CN115305299A

CN115305299A - Blast furnace pipeline airflow pre-judging and processing method and device

Info

Publication number: CN115305299A
Application number: CN202210938776.2A
Authority: CN
Inventors: 陈生利; 陈炯; 詹开洪; 毛佳; 林贤文; 梁杰; 陈振东; 梁桂波; 梁清仁; 黎民杰; 何勇; 温海滨; 俞荣; 何春来; 蓝文韬
Original assignee: SGIS Songshan Co Ltd
Current assignee: SGIS Songshan Co Ltd
Priority date: 2022-08-05
Filing date: 2022-08-05
Publication date: 2022-11-08

Abstract

The invention discloses a blast furnace pipeline airflow pre-judging and processing method and device. The pre-judging and processing method comprises the following steps: acquiring furnace air inlet quantity of a furnace hearth tuyere, furnace air inlet pressure of the furnace hearth tuyere, gas pressure of gas of a furnace top ascending pipe, static pressure at each preset position arranged along a first preset circumference of a furnace body, static pressure at each preset position arranged along a second preset circumference of a furnace waist and static pressure at each preset position arranged along a third preset circumference of a furnace belly in real time; judging whether corresponding preset conditions are met according to at least two of the static pressure at each preset position arranged along a first preset circumference of a furnace body, the static pressure at each preset position arranged along a second preset circumference of a furnace waist and the static pressure at each preset position arranged along a third preset circumference of a furnace belly; if so, judging that the airflow of the blast furnace pipeline is abnormal, and executing corresponding preset operation to realize automatic judgment and treatment of the airflow of the pipeline.

Description

Blast furnace pipeline airflow pre-judging and processing method and device

Technical Field

The invention relates to the technical field of blast furnace production management, in particular to a blast furnace pipeline airflow pre-judging and processing method and device.

Background

In blast furnace production, the pipeline airflow is inevitably generated due to the influence of real-time changes of external factors, raw material quality, smelting process parameters and the like. However, once the pipeline airflow occurs, serious hazards such as explosion, dangerous substance leakage and the like are easily caused, and the direct economic loss is generally at least tens of thousands or even millions. Therefore, there is a need to monitor the blast furnace pipeline gas flow.

The existing monitoring means are mainly as follows: the blast furnace is pre-judged and controlled by the experience of operators before the pipeline airflow occurs in the blast furnace. However, because of the difference in experience and thinking angle of the operators, it is difficult for the blast furnace operator to accurately determine whether or not to initiate the duct flow before the duct flow occurs in the blast furnace. And the pipeline airflow of the blast furnace is usually generated instantly, and the wind reduction or the oxygen reduction strength and the time point adopted by the blast furnace according to manual experience are different, so that the pipeline airflow is still unavoidable.

Disclosure of Invention

The invention provides a blast furnace pipeline airflow prejudging and processing method and device, which are used for automatically prejudging and controlling the blast furnace pipeline airflow and improving the accuracy and effectiveness of judgment and control, thereby ensuring the production safety of a blast furnace and reducing loss.

According to one aspect of the invention, a blast furnace pipeline airflow prejudging and processing method is provided, wherein the blast furnace at least comprises a furnace top, a furnace body, a furnace waist, a furnace belly and a furnace cylinder; the method comprises the following steps:

acquiring the furnace inlet air quantity of the furnace hearth tuyere, the furnace inlet air pressure of the furnace hearth tuyere, the gas pressure of the coal gas of the furnace top ascending pipe, the static pressure at each preset position arranged along a first preset circumference of the furnace body, the static pressure at each preset position arranged along a second preset circumference of the furnace waist and the static pressure at each preset position arranged along a third preset circumference of the furnace belly in real time; wherein the preset orientation comprises at least: eight directions of east, south, west, north, southeast, northeast, southwest and northwest;

judging whether corresponding preset conditions are met according to at least two of the static pressure at each preset position arranged along a first preset circumference of the furnace body, the static pressure at each preset position arranged along a second preset circumference of the furnace waist and the static pressure at each preset position arranged along a third preset circumference of the furnace belly;

if so, judging that the air flow of the blast furnace pipeline is abnormal, and executing corresponding preset operation.

Optionally, according to stove jar wind gap income stove amount of wind, stove jar wind gap income stove wind pressure, furnace roof tedge gas pressure follows the first static pressure of predetermineeing position department of predetermineeing of circumference setting of furnace shaft, follows the static pressure of predetermineeing position department of predetermineeing of circumference setting is predetermine to stove waist second, and follows at least both judges whether satisfy the corresponding preset condition in the static pressure of predetermineeing position department of circumference setting is predetermine to the furnace bosh third, if, then judges blast furnace pipeline gas flow takes place unusually to carry out corresponding preset operation, include:

according to go into the stove amount of wind go into the stove wind pressure, follow the static pressure of each preset position department that the first circumference of furnace body set up of predetermineeing, follow the static pressure of each preset position department that the circumference set up is predetermine to the stove waist second, and follow the static pressure of each preset position department that the circumference set up is predetermine to the furnace belly third judges whether to satisfy and predetermines the symptom condition, if satisfy, then judges the symptom of pipeline air current appear, and sends tip information.

Optionally, the preset symptom condition is: when the circumference is predetermine to the furnace shaft first, circumference is predetermine to the stove waist second with there is the homosynchro rise of three point static pressure on the same position to the circumference is predetermine to the stove abdomen third, just go into the stove wind pressure and rise, when going into the stove amount of wind and reducing, then judge the sign of pipeline air current appears in the position.

according to go into the stove amount of wind go into the stove wind pressure, follow the static pressure of each preset position department that the circumference set up is predetermine to the shaft first, follow the static pressure of each preset position department that the circumference set up is predetermine to the furnace side second, and follow the static pressure of each preset position department that the circumference set up is predetermine to the furnace belly third is judged whether to satisfy and is predetermine the precursor condition, if satisfy, then judges that pipeline air current precursor appears to carry out the air reduction and/or reduce oxygen operation.

Optionally, the preset precursor condition comprises: within a first preset time period or a second preset time period, if three-point static pressures on the same direction of a first preset circumference of the furnace body, a second preset circumference of the furnace waist and a third preset circumference of the furnace belly are synchronously increased, the increasing amounts are all larger than or equal to a first preset increment, the increasing amount of the furnace entering wind pressure is larger than or equal to the first preset increment, and the furnace entering wind volume is gradually reduced, the occurrence of a pipeline airflow precursor is judged; the second preset time length is less than the first preset time length;

or when the static pressures of any two adjacent azimuths on the same circumference are increased and the increase amount is greater than or equal to the first preset increment, judging that a duct airflow precursor occurs.

according to the static pressure at each preset position arranged along the first preset circumference of the furnace body, the static pressure at each preset position arranged along the second preset circumference of the furnace waist and the static pressure at each preset position arranged along the third preset circumference of the furnace belly, whether any static pressure is increased in the first preset time and the increase amount is larger than the second preset increment is judged, if yes, an abnormal complex condition is judged, and abnormal prompt information is sent out.

Optionally, according to stove jar wind gap income stove amount of wind, stove jar wind gap income stove wind pressure, furnace roof tedge gas pressure follows the first static pressure of predetermineeing position department of circumference setting of shaft of the furnace, follows the static pressure of predetermineeing position department of predetermineeing of circumference setting is predetermine to the furnace waist second, and follows at least two in the static pressure of predetermineeing position department of circumference setting is predetermine to the abdomen third and judges whether satisfy the corresponding condition of predetermineeing, if, then judges blast furnace pipeline gas flow takes place unusually to carry out corresponding default operation, include:

according to go into the stove amount of wind go into the stove wind pressure, follow the static pressure of each preset position department that the first preset circumference of shaft set up, follow the static pressure of each preset position department that the circumference set up is predetermine to the stove waist second, and follow the static pressure of each preset position department that the circumference set up is predetermine to the furnace belly third judges whether appear in the second is predetermine in time length go into stove wind pressure rise volume be greater than or equal to the second and predetermine the increment, just go into stove amount of wind reduction and be greater than first preset reduction volume, and follow the static pressure of each preset position department that the first preset circumference of furnace body set up, follow the static pressure of each preset position department that the circumference set up is predetermine to the stove waist second and follow the static pressure of each preset position department that the circumference set up is predetermine to the furnace belly third rises in step, if, then judges that blast furnace gas is not unblocked to carry out the branch and subtract wind and/or stop oxygen boosting operation.

and judging whether the gas pressure of the furnace top ascending pipe is reduced within a second preset time length and the reduction is greater than a second preset reduction amount or not according to the gas pressure of the furnace top ascending pipe and the furnace inlet air volume, if the gas pressure of the furnace top ascending pipe is reduced within the second preset time length and the reduction is greater than the second preset reduction amount, and if the furnace inlet air volume is rapidly increased, judging that pipeline airflow occurs in the furnace, and executing the operation of reducing air and sending prompt information.

Optionally, the blast furnace pipeline airflow predicting and processing method further includes: acquiring the gas temperature of the furnace top ascending pipe in real time; and when the temperature of the coal gas in the furnace top ascending pipe is higher than the preset temperature, starting the furnace top atomization water-fetching cooling system for cooling.

According to another aspect of the invention, a blast furnace pipeline gas flow pre-judging and processing device is provided, wherein the blast furnace at least comprises a furnace top, a furnace body, a furnace waist, a furnace belly and a furnace cylinder; the device comprises:

the acquisition module is used for acquiring the furnace air inlet quantity of the furnace hearth tuyere, the furnace air inlet pressure of the furnace hearth tuyere, the gas pressure of the coal gas of the furnace top ascending pipe, the static pressure of each preset position arranged along the first preset circumference of the furnace body, the static pressure of each preset position arranged along the second preset circumference of the furnace waist and the static pressure of each preset position arranged along the third preset circumference of the furnace belly in real time; wherein the preset orientation comprises at least: eight directions of east, south, west, north, southeast, northeast, southwest and northwest;

the pipeline airflow abnormity judging module is used for judging whether corresponding preset conditions are met according to at least two of the static pressure at each preset position arranged along a first preset circumference of the furnace body, the static pressure at each preset position arranged along a second preset circumference of the furnace waist and the static pressure at each preset position arranged along a third preset circumference of the furnace belly; if so, judging that the blast furnace pipeline airflow is abnormal; and the presetting operation execution module is used for executing corresponding presetting operation when the abnormal condition of the blast furnace pipeline airflow is judged.

The technical scheme of the embodiment of the invention provides a method and a device for prejudging and processing the airflow of a blast furnace pipeline, wherein the prejudging and processing method comprises the following steps: acquiring furnace air inlet quantity of a furnace hearth tuyere, furnace air inlet pressure of the furnace hearth tuyere, gas pressure of gas of a furnace top ascending pipe, static pressure at each preset position arranged along a first preset circumference of a furnace body, static pressure at each preset position arranged along a second preset circumference of a furnace waist and static pressure at each preset position arranged along a third preset circumference of a furnace belly in real time; wherein, predetermine the position and include at least: eight directions of east, south, west, north, southeast, northeast, southwest and northwest; judging whether corresponding preset conditions are met according to at least two of the static pressure at each preset position arranged along a first preset circumference of a furnace body, the static pressure at each preset position arranged along a second preset circumference of a furnace waist and the static pressure at each preset position arranged along a third preset circumference of a furnace belly; if so, judging that the air flow of the blast furnace pipeline is abnormal, and executing corresponding preset operation. Therefore, the automatic judgment and processing of the abnormal conditions of the blast furnace pipeline airflow can be realized in time, and compared with the prior art, the accuracy and the effectiveness of judgment and processing are improved, so that the safety production of the blast furnace is ensured as much as possible, the accident rate is reduced, and the loss is reduced.

It should be understood that the statements in this section do not necessarily identify key or critical features of the embodiments of the present invention, nor do they necessarily limit the scope of the invention. Other features of the present invention will become apparent from the following description.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a flow chart of a method for predicting and processing a blast furnace pipeline airflow according to a first embodiment of the present invention;

FIG. 2 is a schematic view of a blast furnace according to an embodiment of the present invention;

FIG. 3 is a schematic illustration of the predetermined orientations of the predetermined circumferences provided in an embodiment of the present invention;

FIG. 4 is a flowchart illustrating a method for predicting and processing the air flow in the pipeline of the furnace according to the second embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a three-dimensional model of a blast furnace provided in an embodiment of the present invention;

FIG. 6 is a flowchart illustrating a method for predicting and processing airflow in a blast furnace pipeline according to a third embodiment of the present invention;

FIG. 7 is a flowchart illustrating a method for predicting and processing airflow in a blast furnace pipeline according to a fourth embodiment of the present invention;

FIG. 8 is a flowchart illustrating a method for predicting and processing the air flow in a pipeline of a blast furnace according to a fifth embodiment of the present invention;

FIG. 9 is a flowchart illustrating a method for predicting and processing airflow in a pipeline of a blast furnace according to a sixth embodiment of the present invention;

FIG. 10 is a flowchart illustrating an overall method for predicting and processing the air flow in the blast furnace pipeline according to a seventh embodiment of the present invention;

fig. 11 is a block diagram of a blast furnace pipeline airflow predicting and processing apparatus according to an eighth embodiment of the present invention.

Detailed Description

In order to make those skilled in the art better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, shall fall within the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The inventor researches and discovers that in the production of the blast furnace, the pipeline airflow can not be avoided due to the influence of real-time changes of external factors, raw material quality, smelting process parameters and the like. For the accurate judgment of the pipeline airflow, the ironmaking industry does not know uniformly at present, and the influence factors of different pipeline airflows are different. The appearance of pipeline airflow in the blast furnace generally means that the airflow in the furnace is blown out from a local small range or a small channel, the airflow is directly blown to the furnace top from an air port at the lower part of the blast furnace through a material column (the material column forms a channel) in the blast furnace rapidly, and then enters a cloth bag dust removal system and then enters a gas pipe network. The air flow speed of the pipeline is high, the temperature is high (a large amount of high-temperature air flow which is blown in from the air port and reaches 1200 ℃ does not effectively react with furnace burden and directly passes through a pore channel), and furnace top equipment is easy to burn out. And the gas flow which passes through quickly is concentrated in the furnace top area instantly (the furnace top ascending pipe is directly communicated with the gravity dust collector and then enters the bag dust collection system by virtue of the pipeline, so that the effective channel volume is reduced for the water coming from the blast furnace body), and the pressure of the gas is suddenly and greatly increased after the gas is concentrated in the furnace top area. The pipeline airflow formed in the production process of the blast furnace is mostly caused by the fact that the lower pressure of the blast furnace is not matched with the upper pressure of the furnace top, the lower pressure is suddenly increased, or the upper pressure is suddenly reduced. The occurrence of duct flows in the blast furnace is usually instantaneous, typically within a few seconds. Once pipeline airflow occurs to the blast furnace, at least tens of thousands or even millions of losses are generally caused, so that the control of the pipeline airflow frequency of the blast furnace is an important task for ensuring the safety of the blast furnace and reducing the cost.

Under the condition of the prior art, the blast furnace is pre-judged and controlled by the experience of operators before the pipeline airflow appears, and the accuracy and the effectiveness are insufficient. Before the pipeline airflow occurs in the blast furnace, the blast furnace operator is difficult to accurately judge whether the pipeline airflow is caused. Under the normal production condition, when the pressure of the lower part of the blast furnace is gradually increased and the pressure of the upper part is unchanged, the blast furnace operator can adopt air reduction (or synchronous oxygen reduction) operation according to the phenomenon that the pressure of the lower part is increased, and the pressure of the lower part of the blast furnace is reduced by reducing the air quantity entering the blast furnace, so that the pressure of the lower part of the blast furnace is matched with the pressure of the upper part, and the generation of pipeline airflow is controlled. However, due to different experience and thinking angles of operators, the force and time points of wind reduction or oxygen reduction are different, so that a lot of pipeline airflow still cannot be avoided. Under normal production conditions, when the pressure of the upper part of the blast furnace is reduced (possibly, the gas pipe network valve signal is abnormal, the valve is suddenly opened, or the gas pipe leaks and releases pressure and the like), and the pressure of the lower part is unchanged, an operator usually takes the steps of knowing the reason of the pressure reduction of the upper part of the furnace top and then taking a wind reduction or oxygen reduction control measure, because the pressure release speed of the upper part of the general blast furnace is high, the wind reduction is judged and executed again by depending on the manual work, and the effect is not ideal. According to the statistics of domestic accidents, more than 90% of the upper parts of the blast furnaces suddenly release pressure to blow out pipeline airflow. Under the condition of the prior art, in the process of pipeline airflow of a blast furnace, a blast furnace operator firstly considers that the air quantity entering the furnace is adjusted by taking the pipeline airflow elimination as a core, the air reduction and oxygen reduction quantity is less, and the pipeline process can be prolonged; the air and oxygen reduction amount is too large, so that the time for subsequently recovering the furnace condition is prolonged; in the process of pipeline airflow, if the furnace top pressure is too high, a pressure relief measure is needed to reduce the furnace top pressure, and if the furnace top temperature is too high, a measure for reducing the furnace top temperature is also needed, which are controlled by the experience of an operator. In addition, in actual production, an operator is very easy to ignore certain abnormity and cannot take measures in time to cause subsequent accidents. In short, under the prior art, before a lot of pipeline airflow occurs, blast furnace operators are difficult to predict, and the operators predict the pipeline airflow inside the blast furnace and process the pipeline airflow by experience. And the operator needs to spend considerable effort in observing and analyzing the operation of the airflow at all times.

Therefore, the invention provides a blast furnace pipeline airflow prejudging and processing method and device, which are used for automatically prejudging and controlling the blast furnace pipeline airflow and improving the accuracy and effectiveness of judgment and control, thereby ensuring the production safety of a blast furnace and reducing loss.

Example one

Fig. 1 is a flowchart of a blast furnace pipeline airflow pre-judging and processing method according to an embodiment of the present invention, which is applicable to a process of automatically pre-judging and processing a blast furnace pipeline airflow in a blast furnace production management process, and the method can be executed by a blast furnace pipeline airflow pre-judging and processing device, which can be implemented in a form of hardware and/or software, and the blast furnace pipeline airflow pre-judging and processing device can be configured in a server of a blast furnace production management processing platform. Fig. 2 is a schematic structural view of a blast furnace provided in an embodiment of the present invention. Referring to fig. 2, the blast furnace includes at least a furnace top H1, a furnace shaft H2, a furnace waist H3, a furnace belly H4, and a hearth H5.

As shown in fig. 1, the method includes:

s110, acquiring the furnace inlet air quantity of a furnace hearth tuyere, the furnace inlet air pressure of the furnace hearth tuyere, the coal gas pressure of a furnace top ascending pipe, the static pressure at each preset position arranged along a first preset circumference of a furnace body, the static pressure at each preset position arranged along a second preset circumference of a furnace waist and the static pressure at each preset position arranged along a third preset circumference of a furnace belly in real time.

Wherein, predetermine the position and include at least: east, south, west, north, southeast, northeast, southwest, and northwest. Wherein the first preset circumference may be a circumference at an intermediate position of the height of the furnace shell H2; the second preset circumference may be a circumference at a middle position of the height of the furnace waist H3; the third predetermined circumference may be a circumference at an intermediate position of the height of the furnace belly H4. Wherein, the furnace air quantity of the furnace inlet of the furnace cylinder can be acquired in real time through the air speed and air quantity sensor. The furnace inlet air pressure of a furnace cylinder air inlet, the coal gas pressure of a furnace top ascending pipe and the static pressure of each preset position can be obtained in real time through a pressure sensor.

FIG. 3 is a schematic illustration of the predetermined orientations of the predetermined circumferences provided in an embodiment of the present invention. Referring to fig. 2 and 3, wherein the first preset circumference Y1 may be a circumference at an intermediate position of the height of the shaft H2; the second preset circumference Y2 may be a circumference at an intermediate position of the height of the furnace waist H3; the third preset circumference Y3 may be a circumference at an intermediate position of the height of the furnace belly H4. And static pressure collecting points are arranged at each preset position of each preset circumference. For example, eight preset orientations, i.e., east, south, west, north, southeast, northeast, southwest, and northwest, are set on the first preset circumference Y1 of the furnace shell H2; eight preset directions of east, south, west, north, southeast, northeast, southwest and northwest are arranged on a second preset circumference Y2 of the furnace waist H3; eight preset orientations, east, south, west, north, southeast, northeast, southwest and northwest, are provided on the third preset circumference Y3 of the furnace belly H4.

S120, judging whether corresponding preset conditions are met according to at least two of the static pressure at each preset position arranged along a first preset circumference of a furnace body, the static pressure at each preset position arranged along a second preset circumference of a furnace waist and the static pressure at each preset position arranged along a third preset circumference of a furnace belly; if so, judging that the air flow of the blast furnace pipeline is abnormal, and executing corresponding preset operation.

Wherein, predetermine the condition and can appear the pipeline air current symptom condition for certain position, can for the interior pipeline air current precursor condition that appears of stove, can for the interior unsmooth condition of coal gas flow that appears of stove, still can set up according to actual conditions for the interior pipeline air current condition that appears of stove, do not do specific injecing here.

The preset operation can be the operations of sending prompt information, sending abnormal information, reducing wind, reducing oxygen and the like. Wherein, according to the stove wind rate of going into in the stove jar wind gap, stove wind pressure is gone into in the stove jar wind gap, furnace roof tedge gas pressure, along the static pressure of each preset position department that the first preset circumference of furnace shaft set up, along the static pressure of each preset position department that the circumference set up is predetermine to the furnace waist second to and whether satisfy corresponding preset condition is judged to at least both in the static pressure of each preset position department that sets up along the furnace abdomen third preset circumference whether: for example, it may be the case one that whether the corresponding preset condition is satisfied is determined according to the gas pressure of the furnace top ascending pipe and the furnace inlet air volume. And judging whether the corresponding preset conditions are met according to the furnace inlet air quantity of the furnace hearth air inlet, the furnace inlet air pressure of the furnace hearth air inlet, the static pressure at each preset position arranged along the first preset circumference of the furnace body, the static pressure at each preset position arranged along the second preset circumference of the furnace waist and the static pressure at each preset position arranged along the third preset circumference of the furnace belly. And judging whether the corresponding preset conditions are met or not according to the static pressure at each preset position arranged along the first preset circumference of the furnace body, the static pressure at each preset position arranged along the second preset circumference of the furnace waist and the static pressure at each preset position arranged along the third preset circumference of the furnace belly under the third preset condition. The specific setting may be set according to actual conditions, and is not specifically limited herein.

In the technical scheme of this embodiment, the working principle of the blast furnace pipeline airflow pre-judging and processing method is as follows: referring to fig. 1, the furnace air inlet volume of the hearth tuyere, the furnace air inlet pressure of the hearth tuyere, the gas pressure of the gas in the furnace top riser, the static pressure at each preset position along the first preset circumference of the furnace body, the static pressure at each preset position along the second preset circumference of the furnace waist, and the static pressure at each preset position along the third preset circumference of the furnace belly are obtained in real time. Then, judging whether corresponding preset conditions are met according to at least two of the furnace inlet air quantity of a furnace hearth air inlet, the furnace inlet air pressure of the furnace hearth air inlet, the coal gas pressure of a furnace top ascending pipe, the static pressure at each preset position arranged along a first preset circumference of a furnace body, the static pressure at each preset position arranged along a second preset circumference of a furnace waist and the static pressure at each preset position arranged along a third preset circumference of a furnace belly; if so, judging that the air flow of the blast furnace pipeline is abnormal, and executing corresponding preset operation. Specifically, according to one condition (for example, condition one) of at least two of the static pressure at each preset position arranged along the first preset circumference of the furnace body, the static pressure at each preset position arranged along the second preset circumference of the furnace waist, and the static pressure at each preset position arranged along the third preset circumference of the furnace belly, whether the corresponding preset condition is met is judged, if so, the abnormal air flow of the blast furnace pipeline is judged, and the corresponding preset operation (for example, condition one) is executed. If not, the judgment is carried out continuously according to other (condition one and corresponding preset conditions) conditions and corresponding preset conditions of at least two of the static pressure at each preset position arranged along the first preset circumference of the furnace body, the static pressure at each preset position arranged along the second preset circumference of the furnace waist and the static pressure at each preset position arranged along the third preset circumference of the furnace belly. For example, if the above example condition satisfies the corresponding preset condition, it is determined that the air flow of the blast furnace pipeline is abnormal, and the corresponding preset operation is executed without determining other conditions. If the first condition does not meet the corresponding preset condition, continuously judging whether the second condition meets the corresponding preset condition, if the second condition meets the corresponding preset condition, judging that the air flow of the blast furnace pipeline is abnormal, executing corresponding preset operation, and not needing to judge other conditions. And if the second condition does not meet the corresponding preset condition, continuously judging whether the third condition meets the corresponding preset condition, and so on, and details are not repeated. Therefore, the abnormal conditions of the blast furnace pipeline airflow can be automatically judged and processed in time, so that the safe production of the blast furnace is ensured, the accident rate is reduced, and the loss is reduced.

It should be noted that, the judgment orders of the case one, the case two, and the like are not in sequence, and the ordering here is only for exemplary description, and the specific judgment order may be set according to actual situations, and is not specifically limited here.

In the technical solution of this embodiment, a method for predicting and processing a blast furnace pipeline airflow is provided, where the method includes: acquiring furnace air inlet quantity of a furnace hearth tuyere, furnace air inlet pressure of the furnace hearth tuyere, gas pressure of gas of a furnace top ascending pipe, static pressure at each preset position arranged along a first preset circumference of a furnace body, static pressure at each preset position arranged along a second preset circumference of a furnace waist and static pressure at each preset position arranged along a third preset circumference of a furnace belly in real time; wherein, predetermine the position and include at least: eight directions of east, south, west, north, southeast, northeast, southwest and northwest; judging whether corresponding preset conditions are met according to at least two of the static pressure at each preset position arranged along a first preset circumference of a furnace body, the static pressure at each preset position arranged along a second preset circumference of a furnace waist and the static pressure at each preset position arranged along a third preset circumference of a furnace belly; if so, judging that the air flow of the blast furnace pipeline is abnormal, and executing corresponding preset operation. Therefore, the automatic judgment and processing of the abnormal conditions of the blast furnace pipeline airflow can be realized in time, and compared with the prior art, the accuracy and the effectiveness of judgment and processing are improved, so that the safety production of the blast furnace is ensured as much as possible, the accident rate is reduced, and the loss is reduced.

On the basis of the above technical solution, optionally, the blast furnace pipeline airflow predicting and processing method further includes: acquiring the gas temperature of a furnace top riser in real time; and when the temperature of the coal gas in the furnace top ascending pipe is higher than the preset temperature, starting the furnace top atomization water-pumping cooling system for cooling. The method comprises the following steps of monitoring the temperature of coal gas in a furnace top ascending pipe in real time before or after the pipeline airflow occurs in a blast furnace, and starting a furnace top atomization water-pumping cooling system to cool when the temperature of the coal gas in the furnace top ascending pipe is higher than a preset temperature. And when the temperature of the coal gas in the furnace top ascending pipe is lower than the preset temperature again, the furnace top atomization water-injection cooling system is closed. The preset temperature may be 400 degrees, and may be specifically set according to an actual situation, which is not specifically limited herein. The mode of starting or closing the furnace top atomization water-spraying cooling system can be to send an electric control instruction to the furnace top atomization water-spraying cooling system, or to send a temperature change prompt signal to an operator, and the operator performs manual intervention to cool or not cool, and the like. The setting may be specifically performed according to actual conditions, and is not specifically limited herein.

Example two

Fig. 4 is a flowchart of a method for predicting and processing the air flow in the blast furnace pipeline according to the second embodiment of the present invention. On the basis of the first embodiment, optionally referring to fig. 4, the method includes the following steps:

s210, acquiring the furnace inlet air quantity of a furnace hearth tuyere, the furnace inlet air pressure of the furnace hearth tuyere, the coal gas pressure of a furnace top ascending pipe, the static pressure at each preset position arranged along a first preset circumference of a furnace body, the static pressure at each preset position arranged along a second preset circumference of a furnace waist and the static pressure at each preset position arranged along a third preset circumference of a furnace belly in real time.

S220, according to the air volume of entering the furnace, the air pressure of entering the furnace, the static pressure of each preset position that sets up along the first preset circumference of furnace body, the static pressure of each preset position that sets up along the second preset circumference of furnace waist, and follow the static pressure of each preset position that the circumference set up is preset to the furnace bosh third judges whether to satisfy and predetermine the symptom condition, if satisfy, then judges the symptom of pipeline air current appear, and sends prompt message.

Judging whether a preset symptom condition (hereinafter referred to as a condition one) is met or not according to the furnace entering air quantity, the furnace entering air pressure, the static pressure at each preset position arranged along the first preset circumference of the furnace body, the static pressure at each preset position arranged along the second preset circumference of the furnace waist and the static pressure at each preset position arranged along the third preset circumference of the furnace belly, if so, judging that a symptom of pipeline air flow appears, sending prompt information to related personnel, and not sending the furnace entering air quantity to a furnace cylinder air inlet, the furnace entering air pressure of the furnace cylinder air inlet, the coal gas pressure of a furnace top riser, the static pressure at each preset position arranged along the first preset circumference of the furnace body, the static pressure at each preset position arranged along the second preset circumference of the furnace waist and the static pressure at each preset position arranged along the third preset circumference of the furnace belly, wherein other judgment conditions except the condition one are judged. If the corresponding preset symptom conditions are not met, judging other conditions except for one of at least two of the furnace inlet air quantity of the furnace hearth tuyere, the furnace inlet air pressure of the furnace hearth tuyere, the coal gas pressure of the furnace top ascending pipe, the static pressure of each preset position arranged along the first preset circumference of the furnace body, the static pressure of each preset position arranged along the second preset circumference of the furnace waist and the static pressure of each preset position arranged along the third preset circumference of the furnace belly.

Fig. 5 is a schematic structural diagram of a three-dimensional model of a blast furnace provided in an embodiment of the present invention. Illustratively, referring to fig. 5, the static pressures at the preset positions (e.g., eight points Ps1 to Ps 8) along the first preset circumference of the furnace shell, the static pressures at the preset positions (e.g., eight points Pf1 to Pf 8) along the second preset circumference of the furnace waist, and the static pressures at the preset positions (e.g., eight points Py1 to Py 8) along the third preset circumference of the furnace belly can be made into 3D solid curves distributed along the periphery of the blast furnace for intuitively and real-timely determining the pressure distribution on the horizontal circumference of the area. When the pressure of a certain point azimuth increases or decreases, the point displacement corresponding to the azimuth can shift (for example, when the pressure increases, the point moves upwards, and when the pressure decreases, the point moves downwards), and the change trend of the area pressure can be judged from the shift amount. Wherein, under the condition that the blast furnace moves forwards, the pressure of each layer of static pressure points is basically stable and has small fluctuation. The static pressure gradually decreases from the lower part of the blast furnace to the upper part of the furnace body. After receiving the prompt message, the relevant personnel can visually observe the static pressure at each preset position arranged along the first preset circumference of the furnace body, the static pressure at each preset position arranged along the second preset circumference of the furnace waist and the change situation of the static pressure at each preset position arranged along the third preset circumference of the furnace belly in real time through the 3D model shown in FIG. 5 so as to further judge whether the blast furnace is in an extreme situation or not.

Optionally, the preset symptom condition is: when the three-point static pressure on the same direction exists on the first preset circumference of the furnace body, the second preset circumference of the furnace waist and the third preset circumference of the furnace belly, the static pressure is synchronously increased, the air pressure of the furnace is increased, and the air quantity of the furnace is reduced, the fact that the pipeline airflow is in the direction is judged.

Illustratively, whether preset sign conditions are met or not is judged according to the furnace entering air quantity, the furnace entering air pressure, the static pressure of each preset position arranged along the first preset circumference of the furnace body, the static pressure of each preset position arranged along the second preset circumference of the furnace waist and the static pressure of each preset position arranged along the third preset circumference of the furnace belly. And (3) setting static pressures of three points of the northeast direction on the first preset circumference of the furnace body, the northeast direction on the second preset circumference of the furnace waist and the northeast direction on the third preset circumference of the furnace belly to be synchronously increased, increasing the furnace entering air pressure, and judging that a sign of pipeline air flow appears in the northeast direction when the furnace entering air volume is reduced, and sending out prompt information to prompt related personnel that the sign of pipeline air flow appears in the northeast direction.

EXAMPLE III

Fig. 6 is a flowchart of a method for predicting and processing airflow in a blast furnace pipeline according to a third embodiment of the present invention. On the basis of the above embodiment, optionally, with reference to fig. 6, the method includes the steps of:

s310, acquiring the furnace inlet air quantity of a furnace hearth tuyere, the furnace inlet air pressure of the furnace hearth tuyere, the gas pressure of coal gas of a furnace top ascending pipe, the static pressure of each preset position arranged along a first preset circumference of a furnace body, the static pressure of each preset position arranged along a second preset circumference of a furnace waist and the static pressure of each preset position arranged along a third preset circumference of a furnace belly in real time.

S320, judging whether a preset precursor condition is met or not according to the furnace inlet air quantity, the furnace inlet air pressure, the static pressure at each preset position arranged along the first preset circumference of the furnace body, the static pressure at each preset position arranged along the second preset circumference of the furnace waist and the static pressure at each preset position arranged along the third preset circumference of the furnace belly, if so, judging that a pipeline airflow precursor appears, and executing air reduction and/or oxygen reduction operation.

The method comprises the steps of judging whether a preset precursor condition (hereinafter referred to as a condition II) is met or not according to furnace entering air quantity, furnace entering air pressure, static pressure at each preset position arranged along a first preset circumference of a furnace body, static pressure at each preset position arranged along a second preset circumference of a furnace waist and static pressure at each preset position arranged along a third preset circumference of a furnace belly, if so, judging that a pipeline airflow precursor appears, executing air reduction and/or oxygen reduction operation, and judging whether the furnace entering air quantity of a furnace cylinder air inlet, the furnace entering air pressure of the furnace cylinder air inlet, the coal gas pressure of a furnace top ascending pipe, the static pressure at each preset position arranged along the first preset circumference of the furnace body, the static pressure at each preset position arranged along the second preset circumference of the furnace waist and the static pressure at each preset position arranged along the third preset circumference of the furnace belly are at least two or judging other judging conditions except the condition II. If the preset precursor condition is not met, the other conditions except for the second condition of at least two of the static pressure at each preset position arranged along the first preset circumference of the furnace body, the static pressure at each preset position arranged along the second preset circumference of the furnace waist and the static pressure at each preset position arranged along the third preset circumference of the furnace belly are continuously judged. After the pipeline airflow precursor is judged to appear and the wind reduction operation is executed, if the static pressure does not meet the requirement of the normal static pressure, the oxygen reduction operation is continued. For example,

optionally, the preset precursor condition comprises: within a first preset time period or a second preset time period, if three-point static pressures on the same direction of a first preset circumference of a furnace body, a second preset circumference of a furnace waist and a third preset circumference of a furnace belly are synchronously increased, the increasing amounts are all larger than or equal to a first preset increment, the increasing amount of the furnace entering wind pressure is larger than or equal to the first preset increment, and the furnace entering wind volume is gradually reduced, the occurrence of a pipeline airflow precursor is judged; the second preset time length is less than the first preset time length; or when the static pressure of any two adjacent azimuths on the same circumference rises and the rising amount is larger than or equal to the first preset increment, judging that the pipeline airflow precursor occurs. Preferably, the first preset time period may be 2 seconds, and the second preset time period may be 1 second. The specific values of the first preset time length and the second preset time length can be set according to actual conditions, and are not specifically limited herein. Preferably, the first preset increment is 3KPa, which is only exemplary here, and the specific numerical value may be set according to practical situations, which is not limited herein.

The static pressures of any two adjacent directions on the same circumference refer to the static pressures of any two adjacent directions on a first preset circumference, or the static pressures of any two adjacent directions on a second preset circumference, or the static pressures of any two adjacent directions on a third preset circumference. For example, the static pressure at the north east and east adjacent on the second preset circle. The preset precursor condition comprises three conditions: the first method is that in a first preset time, if three-point static pressures on the same direction exist on a first preset circumference of a furnace body, a second preset circumference of a furnace waist and a third preset circumference of a furnace belly are synchronously increased, the increasing amount is larger than or equal to a first preset increment, the increasing amount of the furnace entering air pressure is larger than or equal to the first preset increment, and when the furnace entering air volume is gradually reduced, a pipeline airflow precursor is judged to appear. The second one is that in the second preset duration, if three-point static pressures on the same direction exist on the first preset circumference of the furnace body, the second preset circumference of the furnace waist and the third preset circumference of the furnace belly are all synchronously increased and the increasing amount is larger than or equal to the first preset increment, the increasing amount of the furnace entering air pressure is larger than or equal to the first preset increment, and when the furnace entering air volume is gradually reduced, the pipeline airflow precursor is judged to appear. Thirdly, when the static pressure of any two adjacent azimuths on the same circumference rises and the rising amount is larger than or equal to the first preset increment, the pipeline airflow precursor is judged to occur.

Illustratively, the first preset time period is 2 seconds, the second preset time period is 1 second, and the first preset increment is 3 KPa. In the technical solution of this embodiment, the blast furnace pipeline airflow prejudging and processing method includes: and judging whether the preset precursor condition is met or not according to the furnace inlet air quantity, the furnace inlet air pressure, the static pressure at each preset position arranged along the first preset circumference of the furnace body, the static pressure at each preset position arranged along the second preset circumference of the furnace waist and the static pressure at each preset position arranged along the third preset circumference of the furnace belly. If three-point static pressures (for example, all the three-point static pressures are in the southeast direction) on the same direction of the first preset circumference of the furnace body, the second preset circumference of the furnace waist and the third preset circumference of the furnace belly are synchronously raised and the raising quantity is more than or equal to 3KPa within 2 seconds, the raising quantity of the furnace entering air pressure is more than or equal to 3KPa, and the furnace entering air quantity is gradually reduced, a pipeline airflow precursor is judged to appear, and then the air reducing operation is automatically executed. For example, the air reducing amount is reduced by 50m/min every 1 second, and the air reducing operation is not stopped until the blast furnace entering air pressure is smaller than the preset entering air pressure (the preset entering air pressure is a pressure value meeting the requirement of the entering air pressure). If in the process of wind reduction operation, the furnace entering wind pressure is reduced to be below the preset furnace entering wind pressure through wind reduction operation, the static pressure in the three same directions (southeast direction) is not reduced, and the static pressure in other directions is reduced, the smooth airflow in the direction (southeast direction) is judged to be generated, or a small pipeline airflow is formed, at the moment, the oxygen reduction operation is continuously adopted (namely, the oxygen enrichment is reduced by 1000 m/h), and meanwhile, an early warning signal is sent out. If the static pressure in the three same directions (southeast direction) continues to rise after the oxygen reduction operation and the temperature rise of the top gas above the three same directions is more than 50 degrees, the oxygen reduction operation is continuously performed again (namely, the oxygen enrichment is reduced by 1000 m/h) until the oxygen enrichment is stopped.

If three-point static pressures (for example, northwest directions) on the same direction exist on the first preset circumference of the furnace body, the second preset circumference of the furnace waist and the third preset circumference of the furnace belly within 1 second, the static pressures are synchronously raised, the raising quantity is greater than or equal to 3KPa, the raising quantity of the furnace inlet air pressure is greater than or equal to 3KPa, and the furnace inlet air quantity is gradually reduced, a pipeline airflow precursor is judged to appear, and the air reducing operation is automatically executed at the moment. For example, the air reduction amount is 100m/min every 1 second, and the air reduction operation is not stopped until the blast furnace charging air pressure is smaller than the preset charging air pressure. If in the process of the wind reducing operation, the furnace entering wind pressure is reduced to be below the preset furnace entering wind pressure through the wind reducing operation, the static pressures in the three same directions (northwest direction) are not reduced, and the static pressures in other directions are reduced, the smooth airflow in the direction (northwest direction) is judged to be generated, or a small pipeline airflow is formed, at the moment, the oxygen reducing operation is continuously adopted (namely, the oxygen enrichment is reduced by 1000 m/h), and meanwhile, an early warning signal is sent out. If the static pressure in the three same directions (northwest direction) continues to increase after the oxygen reduction operation and the temperature of the top gas above the three directions increases by more than 50 degrees, the oxygen reduction operation is continued (i.e. the oxygen enrichment is reduced by 1000 m/h) until the oxygen enrichment is stopped. If the static pressures of any two adjacent directions on the same circumference (for example, the south-east direction and the south-east direction adjacent to the third preset circumference) are both increased and the increase amounts are both greater than or equal to 3KPa, it is determined that a pipeline airflow precursor occurs, and the processing is performed according to the operation condition of wind reduction and/or oxygen reduction for 1 second or 2 seconds, which is not described in detail. It should be noted that, if the furnace entering air pressure meets the preset furnace entering air pressure during the process of executing the air reduction and oxygen reduction operation, the system automatically controls the interruption of the processing function during the manual intervention operation of the blast furnace operator.

Example four

Fig. 7 is a flowchart of a method for predicting and processing the air flow in the blast furnace pipeline according to the fourth embodiment of the present invention. On the basis of the above embodiment, optionally, with reference to fig. 7, the method includes the steps of:

s410, acquiring the furnace inlet air quantity of a furnace cylinder air inlet, the furnace inlet air pressure of the furnace cylinder air inlet, the coal gas pressure of a furnace top ascending pipe, the static pressure at each preset position arranged along the first preset circumference of a furnace body, the static pressure at each preset position arranged along the second preset circumference of a furnace waist and the static pressure at each preset position arranged along the third preset circumference of a furnace belly in real time.

And S420, judging whether any static pressure is increased within the first preset time length and the increasing amount is larger than the second preset increment or not according to the static pressure at each preset position arranged along the first preset circumference of the furnace body, the static pressure at each preset position arranged along the second preset circumference of the furnace waist and the static pressure at each preset position arranged along the third preset circumference of the furnace belly, if so, judging that an abnormal complex condition occurs, and sending abnormal prompt information.

Preferably, the second preset increment is 5KPa, which is only an exemplary function, and the specific value may be set according to actual situations, which is not limited specifically herein. The method comprises the steps of judging whether corresponding conditions (hereinafter referred to as a condition three) are met or not according to static pressure at each preset position arranged along a first preset circumference of a furnace body, static pressure at each preset position arranged along a second preset circumference of a furnace waist and static pressure at each preset position arranged along a third preset circumference of a furnace belly, judging whether abnormal complex conditions occur if the corresponding conditions are met, sending abnormal prompt information, and judging whether the furnace air volume entering a furnace cylinder air inlet, the furnace air pressure entering the furnace at the furnace cylinder air inlet, the coal gas pressure of a furnace top ascending pipe, the static pressure at each preset position arranged along the first preset circumference of the furnace body, the static pressure at each preset position arranged along the second preset circumference of the furnace waist and the static pressure at each preset position arranged along the third preset circumference of the furnace belly are at least two of the static pressures. If the conditions are not met, the other conditions except for the third condition of at least two of the static pressure at each preset position arranged along the first preset circumference of the furnace body, the static pressure at each preset position arranged along the second preset circumference of the furnace waist and the static pressure at each preset position arranged along the third preset circumference of the furnace belly are continuously judged.

Illustratively, the first preset time period is 2 seconds, and the second preset increment is 5 KPa. In the technical solution of this embodiment, the specific blast furnace pipeline airflow anticipation and treatment method is implemented according to the following principle: according to the static pressure at each preset position arranged along the first preset circumference of the furnace body, the static pressure at each preset position arranged along the second preset circumference of the furnace waist and the static pressure at each preset position arranged along the third preset circumference of the furnace belly, whether the static pressure at any position is increased within 1 second or not and the increase amount is more than 5KPa is judged, if yes, the situation that local airflow occurs in a blast furnace material column or other serious hidden dangers occur at the moment is shown, an abnormal prompt message is sent, no operation is executed, and the stability of the airflow is checked and judged by related personnel. By means of the 3D model shown in fig. 5, relevant personnel can visually observe the static pressure at each preset position along the first preset circumference of the furnace body, the static pressure at each preset position along the second preset circumference of the furnace waist, and the change of the static pressure at each preset position along the third preset circumference of the furnace belly in real time, so as to further determine whether the blast furnace is in an extreme condition or not.

EXAMPLE five

Fig. 8 is a flowchart of a method for predicting and processing the air flow in the blast furnace pipeline according to the fifth embodiment of the present invention. On the basis of the above embodiment, optionally, with reference to fig. 8, the method includes the steps of:

s510, acquiring the furnace inlet air quantity of a furnace cylinder tuyere, the furnace inlet air pressure of the furnace cylinder tuyere, the coal gas pressure of a furnace top ascending pipe, the static pressure at each preset position arranged along a first preset circumference of a furnace body, the static pressure at each preset position arranged along a second preset circumference of a furnace waist and the static pressure at each preset position arranged along a third preset circumference of a furnace belly in real time.

S520, judging whether the rise of the furnace entering air pressure is larger than or equal to a second preset increment within a second preset time length or not according to the furnace entering air quantity, the furnace entering air pressure, the static pressure at each preset position arranged along a first preset circumference of the furnace body, the static pressure at each preset position arranged along a second preset circumference of the furnace waist and the static pressure at each preset position arranged along a third preset circumference of the furnace belly, wherein the reduction of the furnace entering air quantity is larger than a first preset reduction, the static pressure at each preset position arranged along the first preset circumference of the furnace body, the static pressure at each preset position arranged along the second preset circumference of the furnace waist and the static pressure at each preset position arranged along the third preset circumference of the furnace belly are synchronously raised, if yes, judging that the blast furnace gas is not unblocked, and executing fractional air reduction and/or oxygen enrichment stopping operation.

Judging whether corresponding preset conditions (hereinafter referred to as condition four) are met according to the furnace entering air quantity, the furnace entering air pressure, the static pressure at each preset position arranged along the first preset circumference of the furnace body, the static pressure at each preset position arranged along the second preset circumference of the furnace waist and the static pressure at each preset position arranged along the third preset circumference of the furnace belly, if so, judging that the blast furnace gas is not unblocked, executing fractional air reduction and/or stopping oxygen enrichment operation, and not continuing to enter the furnace air quantity to the furnace cylinder air inlet, the furnace cylinder air inlet air pressure, the furnace top ascending pipe coal air pressure, the static pressure at each preset position arranged along the first preset circumference of the furnace body, the static pressure at each preset position arranged along the second preset circumference of the furnace waist and other judgment conditions except the condition four in at least two of the static pressures at each preset position arranged along the third preset circumference of the furnace belly. If the conditions are not met, the furnace air inlet quantity of the furnace hearth tuyere, the furnace air inlet pressure of the furnace hearth tuyere, the gas pressure of the gas in the furnace top ascending pipe, the static pressure at each preset position arranged along the first preset circumference of the furnace body, the static pressure at each preset position arranged along the second preset circumference of the furnace waist and the static pressure at each preset position arranged along the third preset circumference of the furnace belly are judged according to other conditions except for at least four conditions.

Wherein, preferably, the first preset reduction amount is 50m/min, which is only an exemplary function here, and the specific value can be set according to the actual situation, which is not limited herein. For example, the second preset time period is 1 second, and the second preset increment is 5 KPa. In the technical solution of this embodiment, the specific blast furnace pipeline airflow anticipation and treatment method is implemented according to the following principle: judging whether the rising amount of the entering blast pressure is larger than or equal to 5KPa within 1 second and the reduction amount of the entering blast volume is larger than 50m/min according to the entering blast volume, the entering blast pressure, the static pressure at each preset position arranged along the first preset circumference of the furnace body, the static pressure at each preset position arranged along the second preset circumference of the furnace waist and the static pressure at each preset position arranged along the third preset circumference of the furnace belly, judging that the blast furnace gas is not unblocked and executing the graded air reduction operation if the rising amount of the entering blast pressure is larger than or equal to 5KPa within 1 second and the reduction amount of the entering blast volume is larger than 50 m/min. For example, the air is reduced by 50m/min every 1 second within a certain time period until the furnace entering air pressure is smaller than the preset furnace entering air pressure. If the static pressure of each direction is reduced in the process of air reduction in a grading way, the reduction of the air pressure entering the furnace is greatly reduced by more than 5KPa, and the air volume is increased instantly, the air flow of the central pipeline is judged to appear, the system sends out prompt information, the air is reduced according to the air reduction volume of 100m/min per second, and the oxygen enrichment stopping operation is synchronously executed.

Example six

Fig. 9 is a flowchart of a method for predicting and processing airflow in a blast furnace pipeline according to a sixth embodiment of the present invention. On the basis of the above embodiment, optionally with reference to fig. 9, the method comprises the steps of:

s610, acquiring furnace air entering quantity of a furnace hearth tuyere, furnace air entering pressure of the furnace hearth tuyere, gas pressure of coal gas of a furnace top ascending pipe, static pressure at each preset position arranged along a first preset circumference of a furnace body, static pressure at each preset position arranged along a second preset circumference of a furnace waist and static pressure at each preset position arranged along a third preset circumference of a furnace belly in real time.

S620, judging whether the gas pressure of the furnace top ascending pipe is reduced within a second preset time length and the reduction is larger than a second preset reduction amount or not according to the gas pressure of the furnace top ascending pipe and the furnace entering air quantity, judging that pipeline airflow occurs in the furnace if the furnace entering air quantity is rapidly increased, and executing the operations of reducing air and sending prompt information.

And judging whether corresponding conditions (hereinafter referred to as condition five) are met or not according to the coal gas pressure of the furnace top ascending pipe and the furnace entering air quantity, if so, judging that pipeline airflow occurs in the furnace, executing operations of reducing air and sending prompt information, and not continuing to carry out the furnace entering air quantity of a furnace hearth air inlet, the furnace entering air pressure of the furnace hearth air inlet, the coal gas pressure of the furnace top ascending pipe, at least two of the static pressure at each preset position arranged along the first preset circumference of the furnace body, the static pressure at each preset position arranged along the second preset circumference of the furnace waist and the static pressure at each preset position arranged along the third preset circumference of the furnace belly, and judging other judgment conditions except the condition five. If the conditions are not met, the other conditions except for the fifth condition in at least two of the furnace air inlet quantity of the furnace cylinder air inlet, the furnace air inlet pressure of the furnace cylinder air inlet, the coal gas pressure of the furnace top ascending pipe, the static pressure at each preset position arranged along the first preset circumference of the furnace body, the static pressure at each preset position arranged along the second preset circumference of the furnace waist and the static pressure at each preset position arranged along the third preset circumference of the furnace belly are continuously judged. Preferably, the second predetermined reduction amount is 10KPa, which is only an exemplary effect, and the specific value may be set according to actual situations, which is not limited herein. For example, the second preset time period is 1 second, and the second preset decrement amount is 10 KPa. In the technical solution of this embodiment, the specific blast furnace pipeline airflow prejudging and processing method is implemented according to the following principle: judging whether the gas pressure of the furnace top ascending pipe is reduced within 1 second and the reduction is more than 10KPa according to the gas pressure of the furnace top ascending pipe and the air volume entering the furnace, judging that pipeline airflow occurs in the furnace and executing air reduction operation if the air volume entering the furnace is rapidly increased, wherein the air reduction is reduced to be less than or equal to the original air volume (the original air volume is the air volume meeting the requirement of the air volume entering the furnace), and simultaneously sending prompt information.

EXAMPLE seven

Fig. 10 is a general flowchart of a method for predicting and processing the air flow in the blast furnace pipeline according to the seventh embodiment of the present invention. On the basis of the above embodiments, referring to fig. 10, the overall flow of the blast furnace pipeline airflow predicting and processing method includes the following steps:

and S10, starting execution, and judging whether preset symptom conditions are met according to the furnace inlet air quantity, the furnace inlet air pressure and each static pressure. If the condition is met, the abnormal condition of the pipeline airflow of the blast furnace is judged (for example, the symptom of the pipeline airflow occurs), and corresponding preset operation is executed (for example, prompt information is sent out). If not, execution continues with step S20.

The static pressures refer to the static pressure at the preset positions arranged along the first preset circumference of the furnace body, the static pressure at the preset positions arranged along the second preset circumference of the furnace waist and the static pressure at the preset positions arranged along the third preset circumference of the furnace belly.

And S20, judging whether the preset precursor condition is met or not according to the furnace inlet air quantity, the furnace inlet air pressure and each static pressure. If yes, judging that the pipeline airflow of the blast furnace is abnormal (such as pipeline airflow precursor), and executing corresponding preset operation (such as executing wind reduction and/or oxygen reduction operation). If not, execution continues with step S30.

And S30, judging whether any static pressure is increased within the first preset time length and the increase amount is larger than a second preset increment according to the static pressures. If so, judging that the air flow of the blast furnace pipeline is abnormal (if an abnormal complex condition occurs), and executing corresponding preset operation (if an abnormal prompt message is sent out). If not, execution continues with step S40.

And S40, judging whether the furnace entering air pressure rise amount is larger than or equal to second preset positive energy or not within second preset duration according to the furnace entering air quantity, the furnace entering air pressure and each static pressure, wherein the furnace entering air quantity retrieval amount is larger than a first preset reduction amount, and each static pressure rises synchronously. If so, judging that the airflow of the blast furnace pipeline is abnormal (if the blast furnace gas is not unblocked), and executing corresponding preset operation (such as executing fractional air reduction and/or stopping oxygen enrichment operation). If not, execution continues with step S50.

And S50, judging whether the gas pressure of the furnace top ascending pipe is reduced within a second preset time length or not according to the gas pressure of the furnace top ascending pipe and the furnace entering air quantity, wherein the reduction is larger than a second preset reduction amount, and the furnace entering air quantity is rapidly increased. If so, judging that the pipeline airflow of the blast furnace is abnormal (such as the pipeline airflow in the furnace), and executing corresponding preset operation (such as the operation of reducing the wind and sending prompt information). If not, the routine ends.

It should be noted that, in the execution sequence of the determination conditions such as "determining whether the preset symptom condition is satisfied according to the furnace inlet air volume, the furnace inlet air pressure, and each static pressure", "determining whether the preset precursor condition is satisfied according to the furnace inlet air volume, the furnace inlet air pressure, and each static pressure", and the like in this embodiment, the determination sequence of each determination condition is not sequential, and the sequencing is only for exemplary description here.

Example eight

Fig. 11 is a block diagram of a blast furnace pipeline airflow predicting and processing apparatus according to an eighth embodiment of the present invention. Referring to fig. 11, the apparatus 100 for predicting and processing the air flow in the blast furnace pipeline includes: the acquisition module 101 is used for acquiring the furnace inlet air quantity of a furnace hearth tuyere, the furnace inlet air pressure of the furnace hearth tuyere, the gas pressure of a furnace top riser, the static pressure at each preset position arranged along a first preset circumference of a furnace body, the static pressure at each preset position arranged along a second preset circumference of a furnace waist and the static pressure at each preset position arranged along a third preset circumference of a furnace belly in real time; wherein, predetermine the position and include at least: eight directions of east, south, west, north, southeast, northeast, southwest and northwest; the pipeline airflow abnormity judging module 102 is used for judging whether corresponding preset conditions are met according to at least two of the furnace hearth tuyere entering air quantity, the furnace hearth tuyere entering air pressure, the furnace top ascending pipe gas pressure, the static pressure at each preset position arranged along a first preset circumference of a furnace body, the static pressure at each preset position arranged along a second preset circumference of a furnace waist and the static pressure at each preset position arranged along a third preset circumference of a furnace belly; if so, judging that the airflow of the blast furnace pipeline is abnormal; the preset operation executing module 103 is configured to execute a corresponding preset operation when it is determined that the blast furnace pipeline airflow is abnormal.

The technical scheme of this embodiment is through providing a blast furnace pipeline air current is judged and processing apparatus in advance, and the device includes: the acquisition module is used for acquiring the furnace inlet air quantity of a furnace hearth tuyere, the furnace inlet air pressure of the furnace hearth tuyere, the coal gas pressure of a furnace top riser, the static pressure at each preset position arranged along a first preset circumference of a furnace body, the static pressure at each preset position arranged along a second preset circumference of a furnace waist and the static pressure at each preset position arranged along a third preset circumference of a furnace belly in real time; wherein, predetermine the position and include at least: eight directions of east, south, west, north, southeast, northeast, southwest and northwest; the pipeline airflow abnormity judging module is used for judging whether corresponding preset conditions are met according to at least two of the furnace hearth tuyere entering air quantity, the furnace hearth tuyere entering air pressure, the furnace top ascending pipe coal gas pressure, the static pressure at each preset position arranged along a first preset circumference of a furnace body, the static pressure at each preset position arranged along a second preset circumference of a furnace waist and the static pressure at each preset position arranged along a third preset circumference of a furnace belly; if so, judging that the airflow of the blast furnace pipeline is abnormal; and the presetting operation execution module is used for executing corresponding presetting operation when the abnormal condition of the blast furnace pipeline airflow is judged. Therefore, the device can automatically judge and process the abnormal condition of the blast furnace pipeline airflow in time, and compared with the prior art, the device improves the accuracy and the effectiveness of judgment and processing, thereby ensuring the safe production of the blast furnace as much as possible, reducing the accident rate and reducing the loss.

It should be understood that various forms of the flows shown above may be used, with steps reordered, added, or deleted. For example, the steps described in the present invention may be executed in parallel, sequentially, or in different orders, and are not limited herein as long as the desired result of the technical solution of the present invention can be achieved.

The above-described embodiments should not be construed as limiting the scope of the invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A blast furnace pipeline airflow prejudging and processing method is characterized in that a blast furnace at least comprises a furnace top, a furnace body, a furnace waist, a furnace belly and a furnace hearth; the method comprises the following steps:

2. The blast furnace pipeline air flow pre-judging and processing method according to claim 1, wherein the blast furnace pipeline air flow is judged to be abnormal and corresponding preset operation is performed according to at least two of the furnace cylinder air inlet air volume, the furnace cylinder air inlet air pressure, the furnace top riser coal gas pressure, the static pressure at each preset position along the first preset circumference of the furnace body, the static pressure at each preset position along the second preset circumference of the furnace waist and the static pressure at each preset position along the third preset circumference of the furnace belly, if so, the blast furnace pipeline air flow is judged to be abnormal and corresponding preset operation is performed, including:

3. The blast furnace pipeline airflow predicting and processing method according to claim 2, wherein the predetermined symptom condition is: when the circumference is predetermine to the furnace shaft first, circumference is predetermine to the stove waist second with there is the homosynchro rise of three point static pressure on the same position to the circumference is predetermine to the stove abdomen third, just go into the stove wind pressure and rise, when going into the stove amount of wind and reducing, then judge the sign of pipeline air current appears in the position.

4. The blast furnace pipeline airflow prejudging and processing method according to claim 1, wherein the blast furnace pipeline airflow prejudging and processing method is characterized in that according to the furnace cylinder tuyere furnace entering air volume, the furnace cylinder tuyere furnace entering air pressure, the furnace top riser coal gas pressure, the static pressure at each preset position arranged along the first preset circumference of the furnace body, the static pressure at each preset position arranged along the second preset circumference of the furnace waist, and the static pressure at each preset position arranged along the third preset circumference of the furnace belly, at least two of the static pressures at each preset position judge whether the corresponding preset conditions are met, if so, the blast furnace pipeline airflow is judged to be abnormal, and corresponding preset operations are executed, including:

according to go into the stove amount of wind go into the stove wind pressure, follow the static pressure of each preset position department that the first circumference of furnace body set up of predetermineeing, follow the static pressure of each preset position department that the circumference set up is predetermine to the furnace waist second, and follow the static pressure of each preset position department that the circumference set up is predetermine to the furnace belly third judges whether to satisfy and predetermines the precursor condition, if satisfies, then judges that pipeline air current precursor appears to carry out the operation of subtracting wind and/or oxygen.

5. The blast furnace pipeline airflow anticipation and treatment method according to claim 4, wherein the predetermined precursor condition comprises: within a first preset time length or a second preset time length, if three-point static pressures on the same direction of a first preset circumference of the furnace body, a second preset circumference of the furnace waist and a third preset circumference of the furnace belly are synchronously increased and the increasing amount is larger than or equal to a first preset increment, the increasing amount of the furnace entering air pressure is larger than or equal to the first preset increment, and the furnace entering air volume is gradually reduced, the occurrence of a pipeline airflow precursor is judged; the second preset time length is less than the first preset time length;

or when the static pressures of any two adjacent azimuths on the same circumference are increased and the increasing amount is larger than or equal to the first preset increment, judging that the pipeline airflow precursor occurs.

6. The blast furnace pipeline air flow pre-judging and processing method according to claim 1, wherein the blast furnace pipeline air flow is judged to be abnormal and corresponding preset operation is performed according to at least two of the furnace cylinder air inlet air volume, the furnace cylinder air inlet air pressure, the furnace top riser coal gas pressure, the static pressure at each preset position along the first preset circumference of the furnace body, the static pressure at each preset position along the second preset circumference of the furnace waist and the static pressure at each preset position along the third preset circumference of the furnace belly, if so, the blast furnace pipeline air flow is judged to be abnormal and corresponding preset operation is performed, including:

7. The blast furnace pipeline air flow pre-judging and processing method according to claim 1, wherein the blast furnace pipeline air flow is judged to be abnormal and corresponding preset operation is performed according to at least two of the furnace cylinder air inlet air volume, the furnace cylinder air inlet air pressure, the furnace top riser coal gas pressure, the static pressure at each preset position along the first preset circumference of the furnace body, the static pressure at each preset position along the second preset circumference of the furnace waist and the static pressure at each preset position along the third preset circumference of the furnace belly, if so, the blast furnace pipeline air flow is judged to be abnormal and corresponding preset operation is performed, including:

according to go into the stove amount of wind go into the stove wind pressure, follow the static pressure of each preset position department that the first preset circumference of shaft set up is followed the static pressure of each preset position department that the circumference set up is predetermine to the furnace side second, and follow the static pressure of each preset position department that the circumference set up is predetermine to the furnace belly third judges whether appear in second preset duration go into stove wind pressure rise volume and be greater than or equal to second preset increment, just go into stove amount of wind reduction and be greater than first preset reduction, and follow the static pressure of each preset position department that the first preset circumference of furnace body set up, follow the static pressure of each preset position department that the circumference set up is predetermine to the furnace side second and follow the static pressure of each preset position department that the circumference set up is predetermine to the furnace belly third rises in step, if, then judges that blast furnace gas is unblocked, and carries out the wind reduction of gradation and/or stop oxygen boosting operation.

8. The blast furnace pipeline air flow pre-judging and processing method according to claim 1, wherein the blast furnace pipeline air flow is judged to be abnormal and corresponding preset operation is performed according to at least two of the furnace cylinder air inlet air volume, the furnace cylinder air inlet air pressure, the furnace top riser coal gas pressure, the static pressure at each preset position along the first preset circumference of the furnace body, the static pressure at each preset position along the second preset circumference of the furnace waist and the static pressure at each preset position along the third preset circumference of the furnace belly, if so, the blast furnace pipeline air flow is judged to be abnormal and corresponding preset operation is performed, including:

9. The blast furnace pipeline airflow anticipation and treatment method according to claim 1, further comprising: acquiring the gas temperature of the furnace top riser in real time; and when the temperature of the coal gas in the furnace top ascending pipe is higher than the preset temperature, starting the furnace top atomization water-pumping cooling system for cooling.

10. A blast furnace pipeline airflow prejudging and processing device is characterized in that the blast furnace at least comprises a furnace top, a furnace body, a furnace waist, a furnace belly and a furnace cylinder; the device comprises:

the acquisition module is used for acquiring the furnace inlet air quantity of the furnace hearth tuyere, the furnace inlet air pressure of the furnace hearth tuyere, the gas pressure of the furnace top riser, the static pressure at each preset position arranged along the first preset circumference of the furnace body, the static pressure at each preset position arranged along the second preset circumference of the furnace waist and the static pressure at each preset position arranged along the third preset circumference of the furnace belly in real time; wherein the preset orientation comprises at least: eight directions of east, south, west, north, southeast, northeast, southwest and northwest;

the pipeline airflow abnormity judging module is used for judging whether corresponding preset conditions are met according to at least two of the static pressure at each preset position arranged along a first preset circumference of the furnace body, the static pressure at each preset position arranged along a second preset circumference of the furnace waist and the static pressure at each preset position arranged along a third preset circumference of the furnace belly;

if so, judging that the airflow of the blast furnace pipeline is abnormal;

and the preset operation execution module is used for executing corresponding preset operation when the abnormal condition of the blast furnace pipeline airflow is judged.