CN111778372B - Control method for pressure regulating valve bank of blast furnace top pressure - Google Patents
Control method for pressure regulating valve bank of blast furnace top pressure Download PDFInfo
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- CN111778372B CN111778372B CN202010598599.9A CN202010598599A CN111778372B CN 111778372 B CN111778372 B CN 111778372B CN 202010598599 A CN202010598599 A CN 202010598599A CN 111778372 B CN111778372 B CN 111778372B
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/007—Controlling or regulating of the top pressure
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
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Abstract
The invention discloses a control method of a blast furnace top pressure regulating valve group, wherein a pressure reducing valve group A can be operated to be used as a range valve or an automatic regulating valve, a pressure reducing valve group B can be used as an automatic regulating valve only, a pressure reducing valve group C can be used as a quick opening valve or an automatic regulating valve, and a pressure reducing valve group D can be used as a quick opening valve or an automatic regulating valve. When two of the four groups have faults, the two groups can still be normally used, and one group can realize pressure regulation, so that the technical problem that process accidents such as damping down, air reduction and the like of a blast furnace can be caused when one valve of the pressure reducing valve group has an equipment fault is solved.
Description
Technical Field
The invention relates to a control method of a blast furnace top pressure regulating valve group.
Background
Blast furnace gas generated in the production process of the blast furnace enters the pressure reducing valve bank and the TRT through the furnace top ascending pipe, the neutral dust collector and the dry type bag dust collector, and is subjected to flow regulation through the pressure reducing valve bank and the TRT to be converged into the medium gas ring network. The whole iron-making process is in a closed container, the relation among process parameters is nonlinear strong coupling and uneven, the gas quantity change caused by chemical and physical changes in a blast furnace, the furnace change of a hot blast furnace, intermittent feeding, pressure equalizing and releasing of a charging bucket, and the change of the air quantity and the air pressure of an air blower can influence the top pressure stability of the furnace top. In order to realize normal production of the blast furnace, one of the key conditions is that the top pressure of the blast furnace needs to be stable and large fluctuation cannot occur. Therefore, in the actual production, during the long-term shutdown of a TRT (blast furnace gas excess pressure turbine power generation device) or during the starting and shutdown of the TRT, in order to control the top pressure of the blast furnace in cooperation with the safe and stable conversion of the TRT on the blast furnace gas, each set of blast furnace is provided with a set of pressure reducing valve bank, and each pressure reducing valve bank consists of 1 regulating valve with DN600 caliber, one quick opening valve 1 with DN900 caliber, one quick opening valve 2 with DN900 caliber and one measuring range valve with DN900 caliber and is parallel to TRT equipment. As shown in figure 1 of the drawings;
the control mode of four valves of the original pressure reducing valve group is as follows:
in fig. 1, when the pressure reducing valve group a is adjusted by the pressure reducing valve group B, the valve keeps a certain valve opening, so that the valve position of the pressure reducing valve group B is within an effective control range, and the pressure reducing valve group a has a quick opening function once the gas pressure is too high. When the "manual" state is switched, the valve can be manually operated on the screen of the HMI.
In the state that the pressure reducing valve group B in the figure 1 is used for preliminary stabilization of top pressure, the furnace top pressure can be accurately regulated when the automatic state is switched, and PID output control regulation is adopted. When the "manual" state is switched, the valve can be manually operated on the screen of the HMI.
In fig. 1, the pressure reducing valve group C is in a closed state during normal operation, and when the "automatic" state is switched, the pressure reducing valve group C is completely opened within 500 milliseconds after being used as a TRT system to send out a heavy fault signal. When the "manual" state is switched, the valve can be manually operated on the screen of the HMI.
In fig. 1, the pressure reducing valve group D is closed during normal operation, and is used as a backup valve of the quick-opening valve, and is used together with the pressure reducing valve group C. And when the automatic state is switched, the valve is fully opened within 500 milliseconds after a TRT system sends out a heavy fault signal. When the "manual" state is switched, the valve can be manually operated on the screen of the HMI.
The original valve control mode is that the control logics of the valves are mutually independent, and the functions of each valve are mutually independent. Except that the pressure reducing valve group C and the pressure reducing valve group D have one function for use, when any valve has equipment failure, the blast furnace has major process accidents of damping down or slow wind in the production condition.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a control method of a blast furnace top pressure regulating valve group, which can solve the technical problem that process accidents such as damping down, air reduction and the like of a blast furnace can be caused when one valve of a pressure reducing valve group is in equipment failure.
The purpose of the invention is realized by adopting the following technical scheme:
the utility model provides a blast furnace roof pressure regulating valves control method, pressure regulating valves include A, B, C, D four relief pressure valves, with pressure reducing valves A, pressure reducing valves B, pressure reducing valves C, pressure reducing valves D respectively with the TRT unit set up side by side, pressure reducing valves A, pressure reducing valves B, pressure reducing valves C, pressure reducing valves D, TRT unit one end and blast furnace sack dust pelletizing system connection, the other end and outside pipe connection, its characterized in that includes following step: the operation the pressure reducing valve bank A can be used as a range valve or an automatic regulating valve, the pressure reducing valve bank B only can be used as an automatic regulating valve, the pressure reducing valve bank C can be used as a quick-opening valve or an automatic regulating valve, the pressure reducing valve bank D can be used as a quick-opening valve or an automatic regulating valve, the operation the pressure reducing valve bank A the pressure reducing valve bank B the pressure reducing valve bank C and four pressure reducing valve bank conversion functions of the pressure reducing valve bank D use pressure regulation, wherein only one pressure reducing valve bank is allowed to be used as a regulating valve in the four pressure reducing valve banks.
A control method for a blast furnace top pressure regulating valve group comprises the following steps: confirming that the pressure reducing valve group A is used as a range valve button by operating a human-computer interface, wherein the pressure reducing valve group A is used as a range valve and has an automatic adjusting function of the range valve;
step two: confirming that a valve B of the pressure reducing valve group B is normally put into a button, and regulating a valve of the pressure reducing valve group B to be used;
step three: inputting a white area beside a top pressure setting output frame below a normal input button of a valve B of the pressure reducing valve group B, and confirming a target input value;
step four: confirming that the pressure reducing valve group C and the pressure reducing valve group D are used as quick-opening valve buttons, and quickly opening a valve of the pressure reducing valve group C and quickly opening a valve of the pressure reducing valve group D;
step five: confirming the pressure reducing valve group C or the pressure reducing valve group D as a main quick-opening valve button,
step six: confirming a TRT interlocking button below the pressure reducing valve group C; when the TRT unit breaks down, according to the selected main quick-opening valve of the pressure reducing valve group C or the main quick-opening valve of the pressure reducing valve group D, the corresponding quick-opening valve of the quick-opening valves of the pressure reducing valve group C and the pressure reducing valve group D is opened, and the other quick-opening valve is reserved.
In one embodiment, the top pressure of the blast furnace is set to be 220Kpa, so that the pressure of the blast furnace is stable, when the opening of the regulating valve of the pressure reducing valve group B is larger than 60%, the opening of the range valve of the pressure reducing valve group A is increased by 1% every 5 seconds to perform follow-up change, and the maximum opening of the range valve of the pressure reducing valve group A can reach 60%;
when the opening of the regulating valve of the pressure reducing valve group B fluctuates between 30 and 60 percent, the range valve of the pressure reducing valve group A keeps the opening in the previous state and does not change;
when the opening of the regulating valve of the pressure reducing valve group B is smaller than 30%, the opening of the range valve of the pressure reducing valve group A is reduced by 1% every 5 seconds to perform follow-up change, and the minimum opening of the range valve of the pressure reducing valve group A is 0%.
In one embodiment, the preparation opening of the A-range valve of the pressure reducing valve group is 5% -10%.
A control method of a blast furnace top pressure regulating valve group is characterized in that a pressure reducing valve group A is used as a regulating valve, and the steps are as follows: confirming a valve B withdrawing adjusting button of the pressure reducing valve group B by operating a human-computer interface;
step two: confirming that the pressure reducing valve group A is used as a regulating valve button, and starting to use a regulating valve of the pressure reducing valve group A;
step three: a white area beside an output frame of the pressure reducing valve group A, which is used as the top pressure setting below a regulating valve button, is input for confirming a target input value;
step four: confirming that the pressure reducing valve group C and the pressure reducing valve group D are used as quick-opening valve buttons, and quickly opening the valves of the pressure reducing valve group C and the pressure reducing valve group D;
step five: confirming that the pressure reducing valve group C or the pressure reducing valve group D is used as a main quick-opening valve button;
step six: and confirming a TRT interlocking button below the pressure reducing valve group C, and when the TRT set breaks down, opening a corresponding quick-opening valve in the quick-opening valve of the pressure reducing valve group C and the quick-opening valve of the pressure reducing valve group D according to the selected main quick-opening valve of the pressure reducing valve group C or the main quick-opening valve of the pressure reducing valve group D, wherein the other quick-opening valve is reserved.
In one embodiment, a pressure reducing valve group C is confirmed to be used as a main quick-opening valve button, when a TRT unit has a serious fault, (1) when the opening of a valve calculated by the TRT in real time is lower than 30%, the quick-opening valve of the pressure regulating valve group C is opened to 30%, and meanwhile, a maintenance valve is also opened at the same time, so that the opening speed of the quick-opening valve of the pressure regulating valve group C is increased;
(2) when the opening of the valve calculated by the TRT in real time is larger than 60%, the pressure regulating valve group C is opened to 60% opening, and meanwhile, the maintenance valve is also opened at the same time, so that the opening speed of the quick opening of the pressure regulating valve group C is increased;
(3) when the opening of the valve calculated by the TRT in real time is between 30% and 60%, the quick opening valve of the pressure regulating valve group C is opened to the actual opening of the valve calculated by the TRT in real time, and meanwhile, the maintenance valve is also opened at the same time, so that the opening speed of the quick opening valve of the pressure regulating valve group C is increased;
(4) when the feedback change of the quick opening valve of the pressure regulating valve group C is not received after 1.5 seconds, the quick opening valve of the pressure regulating valve group D immediately executes the actions of (1), (2) and (3).
A control method of a blast furnace top pressure regulating valve group is characterized in that a pressure reducing valve group C is used as a regulating valve, and the steps are as follows: confirming a valve B withdrawing adjusting button of the pressure reducing valve group B by operating a human-computer interface;
step two: confirming that the pressure reducing valve group A is used as a range valve button, and using a range valve of the pressure reducing valve group A;
step three: confirming that the pressure reducing valve group C is used as a regulating valve button, and regulating the valve of the pressure reducing valve group C;
step four: inputting a target input value for confirmation in a white area beside an output frame of the pressure reducing valve group A, which is used as the top pressure setting below a range valve button;
step five: confirming that the pressure reducing valve group D is used as a quick-opening valve button, and quickly opening a valve for the pressure reducing valve group D;
step six: confirming a pressure reducing valve group D as a main quick-opening valve button;
step seven: the TRT unlock button below the pressure relief valve block D is confirmed.
A control method of a blast furnace top pressure regulating valve group is characterized in that a pressure reducing valve group D is used as a regulating valve, and the steps of the method are as follows: confirming a valve B withdrawing adjusting button of the pressure reducing valve group B by operating a human-computer interface;
step two: confirming that the pressure reducing valve group A is used as a range valve button, and using a range valve of the pressure reducing valve group A;
step three: confirming that the pressure reducing valve group C is used as a quick-opening valve button, and quickly opening a valve for the pressure reducing valve group C;
step four: confirming the pressure reducing valve group C as a main quick-opening valve button;
step five: confirming a TRT unlocking button below the pressure reducing valve group C;
step six: confirming that the pressure reducing valve group D is used as a regulating valve button, and regulating the valve of the pressure reducing valve group D;
step seven: and a white area beside an output frame of the pressure reducing valve group A, which is used as the 'top pressure setting' below the range valve button, is input for confirming the target input value.
In one embodiment, the pressure relief valve block a, the pressure relief valve block B, the pressure relief valve block C, and the pressure relief valve block D are provided with an automatic or manual mode of operation.
In one embodiment, the pressure reducing valve group a is a pressure reducing valve group DN900, the pressure reducing valve group B is a pressure reducing valve group DN600, the pressure reducing valve group C is a pressure reducing valve group ADN900, and the pressure reducing valve group D is a pressure reducing valve group ADN 900.
The invention has the beneficial effects that: the pressure reducing valve group A can be used as a range valve or an automatic regulating valve, the pressure reducing valve group B can be used as an automatic regulating valve only, the pressure reducing valve group C can be used as a quick opening valve or an automatic regulating valve, and the pressure reducing valve group D can be used as a quick opening valve or an automatic regulating valve. When two of the four groups have faults, the two groups can still be normally used, and one group can realize pressure regulation, so that the technical problem that process accidents such as damping down, air reduction and the like of a blast furnace can be caused when one valve of the pressure reducing valve group has an equipment fault is solved.
Drawings
FIG. 1 is a flow chart of a control process of a pressure regulating valve set for the top pressure of a blast furnace;
FIG. 2 is a control flow chart of a control method of a blast furnace top pressure regulating valve group of the invention;
FIG. 3 is a flow chart of a pressure reducing valve group A of the present invention as a range valve control;
FIG. 4 is a flow chart of the pressure reducing valve bank A of the present invention as a control valve of the regulator valve;
FIG. 5 is a flow chart of the pressure reducing valve set A of the present invention as a regulator valve set pressure;
FIG. 6 is a flow chart of the pressure reducing valve block B of the present invention as a control valve of the regulator valve;
fig. 7 is a flow chart of the quick-opening control of the pressure reducing valve group C and the pressure reducing valve group D according to the invention.
Detailed Description
The present invention is further described with reference to the drawings, and it should be noted that the technical features described below can be arbitrarily combined to form a new embodiment without conflict.
As shown in fig. 2, a blast furnace roof pressure regulating valves control method, pressure regulating valves include A, B, C, D four relief valves, with relief valve group A, relief valve group B, relief valve group C, relief valve group D respectively with the TRT unit set up side by side, relief valve group A, relief valve group B, relief valve group C, relief valve group D, TRT unit one end and blast furnace sack dust pelletizing system connection, the other end and outside pipe connection, include following step: operation pressure reducing valve group A can be done range valve or automatically regulated valve and use, and automatic regulated valve uses only to be done to pressure reducing valve group B, and quick-opening valve or automatically regulated valve use can be done to pressure reducing valve group C, and quick-opening valve or automatically regulated valve use can be done to pressure reducing valve group D, and four pressure reducing valve group conversion functions of operation pressure reducing valve group A, pressure reducing valve group B, pressure reducing valve group C and pressure reducing valve group D use the pressure regulating, and wherein, only allow a pressure reducing valve group to use as the governing valve among four pressure reducing valve groups. The pressure reducing valve group A is a pressure reducing valve group DN900, the pressure reducing valve group B is a pressure reducing valve group DN600, the pressure reducing valve group C is a pressure reducing valve group ADN900, the pressure reducing valve group D is a pressure reducing valve group ADN900, and the pressure reducing valve group A, the pressure reducing valve group B, the pressure reducing valve group C and the pressure reducing valve group D are all provided with automatic or manual operation modes.
The pressure-reducing valve bank A can be used as a range valve or an automatic regulating valve, the pressure-reducing valve bank B can be used as an automatic regulating valve only, the pressure-reducing valve bank C can be used as a quick-opening valve or an automatic regulating valve, and the pressure-reducing valve bank D can be used as a quick-opening valve or an automatic regulating valve. When two of the four groups have faults, the two groups can still be normally used, and one group can realize pressure regulation, so that the technical problem that process accidents such as damping down, air reduction and the like of a blast furnace can be caused when one valve of the pressure reducing valve group has an equipment fault is solved.
As shown in fig. 3, the pressure reducing valve group a can be used as a range valve:
when the left button of the mouse of the user is used as a range valve button, the picture can pop up a confirmation button, and after the mouse confirms, the picture of the button is changed into green. And the user mouse left button "automatic" button, the picture will pop up the confirmation button at this moment, after the mouse confirms, the button picture turns into green. At the moment, the pressure reducing valve group A range valve has the automatic range valve adjusting function. (the preliminary opening degree is generally 5% -10%, and can be determined as required).
If the top pressure of the blast furnace is set to be 220Kpa, the regulating valve of the pressure valve group B starts to automatically regulate. When the pressure of the blast furnace is ensured to be stable, once the opening of the regulating valve of the pressure reducing valve group B is larger than 60%, the opening of the range valve of the pressure reducing valve group A is increased by 1% every 5 seconds to change with the change (the opening is up to 60%). When the opening of the regulating valve of the pressure reducing valve group B fluctuates between 30 and 60 percent, the range valve of the pressure reducing valve group A keeps the opening in the previous state and does not change. When the opening of the regulating valve of the pressure reducing valve group B is smaller than 30%, the opening of the range valve of the pressure reducing valve group A is reduced by 1% every 5 seconds to perform follow-up change (the opening is minimum to 0%).
As shown in fig. 4 and 5, the pressure reducing valve group a can be used as a regulating valve:
firstly, when a user needs to push a mouse left button of a 'B valve exit regulation' button of a regulating valve of a pressure regulating valve group B, a picture can pop up a confirmation button, and after the confirmation of the mouse, the picture of the button is changed into green. The system now allows the other hydraulic valve block to function as a regulator valve.
At the moment, when a left mouse button of a user is used as an adjusting valve, a confirmation button can pop up on the picture, and the picture of the button is changed into green after the mouse confirms. And the user mouse left button "automatic" button, the picture will pop up the confirmation button at this moment, after the mouse confirms, the button picture turns into green. At the moment, the range valve A of the pressure regulating valve group has the automatic regulating function of the regulating valve.
At the moment, a user clicks a white area beside the top pressure setting output frame in the graph 5, the output frame flickers at the moment, a target input value is input, and after a confirming button is clicked, the range valve A of the pressure regulating valve group has the automatic regulating function of the regulating valve and is regulated according to the fluctuation of actual top pressure.
As shown in fig. 6, the pressure reducing valve group B can be used as a regulating valve (in normal operation, the pressure reducing valve group B is preferentially used as a regulating valve):
firstly, a user needs to use a mouse left button of a 'B valve normal operation' button of a regulating valve of a pressure regulating valve group B, a picture can pop up a confirmation button, and after the confirmation of the mouse, the picture of the button is changed into green. At the moment, the regulating valve of the pressure regulating valve group B has the function of a regulating valve.
At the moment, a user clicks a white area beside the top pressure setting output frame in the graph 5, the output frame flickers at the moment, a target input value is input, and after a confirming button is clicked, the regulating valve of the pressure regulating valve group B has the automatic regulating function of the regulating valve and regulates according to the fluctuation of actual top pressure.
As shown in fig. 7: the pressure regulating valve group C and the pressure regulating valve group D can be used as quick opening valves:
when the left mouse button of the user is used as a quick-opening valve button, the picture pops up a confirmation button, and after the mouse confirms, the picture of the button is changed into green. And the user mouse left button "automatic" button, the picture will pop up the confirmation button at this moment, after the mouse confirms, the button picture turns into green. The user also needs to use the left mouse button for the 'TRT chain' button, at this time, the picture can pop up a confirmation button, and after the confirmation of the mouse, the picture of the button is changed into green. At the moment, the quick opening valve of the pressure regulating valve group C has the function of a quick opening valve.
The user mouse left button 'C valve is the main quick-opening valve' button, at this moment, the picture can pop up the confirmation button, and after the mouse confirms, the button picture becomes green. At this time, the C valve is a main quick-opening valve. If the user mouse left button 'D valve is the main quick-opening valve' button, the picture can pop up a confirmation button at the moment, and after the mouse confirms, the button picture is changed into green. The D valve acts as the main quick-opening valve.
When the TRT set has a heavy fault: the pressure regulating valve group C quick-opening valve and the pressure regulating valve group D quick-opening valve are used as quick-opening valves, and a user firstly selects the pressure regulating valve group C quick-opening valve and the pressure regulating valve group D quick-opening valve as main quick-opening valves to be firstly-acting quick-opening valves. At the moment, the regulating valve of the pressure regulating valve group B (automatic selection) continues to automatically regulate.
And (3) selecting the pressure regulating valve group C which is moved firstly, and immediately moving the quick opening valve, wherein the opening degree of the quick opening valve takes the valve opening degree calculated in real time by TRT as a reference.
(1) When the valve opening calculated by the TRT in real time is lower than 30%, the pressure regulating valve group C is opened to 30% opening, and meanwhile, the maintenance valve is also opened at the same time, so that the opening speed of the pressure regulating valve group C is increased.
(2) And when the opening of the valve calculated by the TRT in real time is larger than 60%, the pressure regulating valve group C is opened to 60% opening quickly. And meanwhile, the maintenance valve is also opened simultaneously, so that the opening speed of the quick opening valve of the pressure regulating valve group C is increased.
(3) And when the opening of the valve calculated by the TRT in real time is between 30 and 60 percent, the pressure regulating valve group C is opened quickly to the actual opening of the valve calculated by the TRT in real time. And meanwhile, the maintenance valve is also opened simultaneously, so that the opening speed of the quick opening valve of the pressure regulating valve group C is increased.
(4) When the feedback change of the quick opening valve of the pressure regulating valve group C is not received after 1.5 seconds, the quick opening valve of the pressure regulating valve group D immediately executes the actions of (1), (2) and (3).
(5) When pressure regulating valves D opened the valve for giving first place to, open D valve preferentially, if do not receive the feedback change that pressure regulating valves D opened the valve soon after 1.5 seconds, pressure regulating valves C opened the valve automatically soon, the prerequisite was that pressure regulating valves D, pressure regulating valves C all selected to open the valve soon.
Implementation 1: a control method for a blast furnace top pressure regulating valve group comprises the following steps: the method comprises the steps that by operating a human-computer interface, the pressure reducing valve group A is confirmed to be used as a range valve button, the pressure reducing valve group A is used as a range valve, and the pressure reducing valve group A has an automatic range valve adjusting function;
step two: confirming that a valve B of the pressure reducing valve group B is normally put into a button, and regulating a valve of the pressure reducing valve group B to be used;
step three: inputting a white area beside a top pressure setting output frame below a normal input button of a valve B of the pressure reducing valve group B, and confirming a target input value;
step four: confirming that the pressure reducing valve group C and the pressure reducing valve group D are used as quick-opening valve buttons, and quickly opening the valves of the pressure reducing valve group C and the pressure reducing valve group D;
step five: confirming the pressure reducing valve group C or the pressure reducing valve group D as a main quick-opening valve button,
step six: confirming a TRT interlocking button below the pressure reducing valve group C; when the TRT unit breaks down, according to the selected main quick-opening valve of the pressure reducing valve group C or the main quick-opening valve of the pressure reducing valve group D, the corresponding quick-opening valve of the quick-opening valves of the pressure reducing valve group C and the pressure reducing valve group D is opened, and the other quick-opening valve is reserved.
Example 2: a control method of a blast furnace top pressure regulating valve group is characterized in that a pressure reducing valve group A is used as a regulating valve, and the steps are as follows: confirming that a valve B of the pressure reducing valve group B exits from an adjusting button (when an adjusting valve of the pressure reducing valve group B is in failure or needs to be overhauled) by operating a human-computer interface;
step two: confirming that the pressure reducing valve group A is used as a regulating valve button, and starting to use a regulating valve of the pressure reducing valve group A;
step three: a white area beside an output frame of the pressure reducing valve group A, which is used as the top pressure setting below a regulating valve button, is input for confirming a target input value;
step four: confirming that the pressure reducing valve group C and the pressure reducing valve group D are used as quick-opening valve buttons, and quickly opening the valves of the pressure reducing valve group C and the pressure reducing valve group D;
step five: confirming that the pressure reducing valve group C or the pressure reducing valve group D is used as a main quick-opening valve button;
step six: and confirming a TRT interlocking button below the pressure reducing valve group C, and when the TRT set breaks down, opening a corresponding quick-opening valve in the quick-opening valve of the pressure reducing valve group C and the quick-opening valve of the pressure reducing valve group D according to the selected main quick-opening valve of the pressure reducing valve group C or the main quick-opening valve of the pressure reducing valve group D, wherein the other quick-opening valve is reserved.
Example 3: a control method of a blast furnace top pressure regulating valve group is characterized in that a pressure reducing valve group C is used as a regulating valve, and the steps are as follows: confirming that a valve B of the pressure reducing valve group B is withdrawn from an adjusting button (when an adjusting valve of the pressure reducing valve group B is in failure or needs to be overhauled) by operating a human-computer interface;
step two: confirming that the pressure reducing valve group A is used as a range valve button, and using a range valve of the pressure reducing valve group A;
step three: confirming that the pressure reducing valve group C is used as a regulating valve button, and regulating the valve of the pressure reducing valve group C;
step four: inputting a target input value for confirmation in a white area beside an output frame of the pressure reducing valve group A, which is used as the top pressure setting below a range valve button;
step five: confirming that the pressure reducing valve group D is used as a quick-opening valve button, and quickly opening a valve for the pressure reducing valve group D;
step six: confirming a pressure reducing valve group D as a main quick-opening valve button;
step seven: the TRT unlock button below the pressure relief valve block D is confirmed.
Example 4: a control method of a blast furnace top pressure regulating valve group is characterized in that a pressure reducing valve group D is used as a regulating valve, and the steps are as follows: confirming that a valve B of the pressure reducing valve group B is withdrawn from an adjusting button (when an adjusting valve of the pressure reducing valve group B is in failure or needs to be overhauled) by operating a human-computer interface;
step two: confirming that the pressure reducing valve group A is used as a range valve button, and using a range valve of the pressure reducing valve group A;
step three: confirming that the pressure reducing valve group C is used as a quick-opening valve button, and quickly opening a valve for the pressure reducing valve group C;
step four: confirming the pressure reducing valve group C as a main quick-opening valve button;
step five: confirming a TRT unlocking button below the pressure reducing valve group C;
step six: confirming that the pressure reducing valve group D is used as a regulating valve button, and regulating the valve of the pressure reducing valve group D;
step seven: and a white area beside an output frame of the pressure reducing valve group A, which is used as the 'top pressure setting' below the range valve button, is input for confirming the target input value.
Implement 1, the control method that the valve function of pressure reducing valve group switches makes four groups of valves of blast furnace pressure reducing valve group normal operation, and embodiment 2 to embodiment 4 are when the governing valve B of pressure reducing valve group breaks down or need overhaul when, and the control method that the valve function of pressure reducing valve group switches makes three groups of valves of blast furnace pressure reducing valve group normal operation.
The control method for switching the functions of the valves of the pressure reducing valve bank can ensure that only two groups of valves of the blast furnace pressure reducing valve bank can normally operate, wherein the normal operation of the blast furnace can be guaranteed under the condition that two groups of valves fail, and the blast furnace can not have process accidents such as damping down, air reducing and the like.
The features of the invention claimed and/or described in the specification may be combined, and are not limited to the combinations set forth in the claims by the recitations therein. The technical solutions obtained by combining the technical features in the claims and/or the specification also belong to the scope of the present invention.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention are still within the scope of the technical solution of the present invention.
Claims (9)
1. The utility model provides a blast furnace roof pressure regulating valves control method, pressure regulating valves include A, B, C, D four relief pressure valves, with pressure reducing valves A, pressure reducing valves B, pressure reducing valves C, pressure reducing valves D respectively with the TRT unit set up side by side, pressure reducing valves A, pressure reducing valves B, pressure reducing valves C, pressure reducing valves D, TRT unit one end and blast furnace sack dust pelletizing system connection, the other end and outside pipe connection, its characterized in that includes following step: operating the pressure reducing valve group A to be used as a range valve or an automatic regulating valve, operating the pressure reducing valve group B to be used only as an automatic regulating valve, operating the pressure reducing valve group C to be used as a quick opening valve or an automatic regulating valve, operating the pressure reducing valve group A, the pressure reducing valve group B, the pressure reducing valve group C and the pressure reducing valve group D to perform conversion functions to use pressure regulation, wherein only one pressure reducing valve group in the four pressure reducing valve groups is allowed to be used as a regulating valve;
wherein, the first step: confirming that the pressure reducing valve group A is used as a range valve button by operating a human-computer interface, wherein the pressure reducing valve group A is used as a range valve and has an automatic adjusting function of the range valve;
step two: confirming that a valve B of the pressure reducing valve group B is normally put into a button, and regulating a valve of the pressure reducing valve group B to be used;
step three: inputting a white area beside a top pressure setting output frame below a normal input button of a valve B of the pressure reducing valve group B, and confirming a target input value;
step four: confirming that the pressure reducing valve group C and the pressure reducing valve group D are used as quick-opening valve buttons, and quickly opening a valve of the pressure reducing valve group C and quickly opening a valve of the pressure reducing valve group D;
step five: confirming the pressure reducing valve group C or the pressure reducing valve group D as a main quick-opening valve button,
step six: confirming a TRT interlocking button below the pressure reducing valve group C; when the TRT unit breaks down, according to the selected main quick-opening valve of the pressure reducing valve group C or the main quick-opening valve of the pressure reducing valve group D, the corresponding quick-opening valve of the quick-opening valves of the pressure reducing valve group C and the pressure reducing valve group D is opened, and the other quick-opening valve is reserved.
2. The control method of the blast furnace top pressure regulating valve group according to claim 1, characterized in that the top pressure of the blast furnace is set to 220KPa, the pressure of the blast furnace is ensured to be stable, and when the opening of the regulating valve of the pressure reducing valve group B is more than 60%, the opening of the measuring valve of the pressure reducing valve group A is increased by 1% every 5 seconds to change with follow-up, and the maximum opening of the measuring valve of the pressure reducing valve group A is up to 60%;
when the opening of the regulating valve of the pressure reducing valve group B fluctuates between 30 and 60 percent, the range valve of the pressure reducing valve group A keeps the opening in the previous state and does not change;
when the opening of the regulating valve of the pressure reducing valve group B is smaller than 30%, the opening of the range valve of the pressure reducing valve group A is reduced by 1% every 5 seconds to perform follow-up change, and the minimum opening of the range valve of the pressure reducing valve group A is 0%.
3. The control method of the blast furnace top pressure regulating valve group according to claim 1, wherein the preparation opening of the A range valve of the pressure reducing valve group is 5-10%.
4. The control method of the blast furnace top pressure regulating valve group according to claim 1, wherein the pressure reducing valve group A is used as a regulating valve, and the first step is as follows: confirming a valve B withdrawing adjusting button of the pressure reducing valve group B by operating a human-computer interface;
step two: confirming that the pressure reducing valve group A is used as a regulating valve button, and starting to use a regulating valve of the pressure reducing valve group A;
step three: a white area beside an output frame of the pressure reducing valve group A, which is used as the top pressure setting below a regulating valve button, is input for confirming a target input value;
step four: confirming that the pressure reducing valve group C and the pressure reducing valve group D are used as quick-opening valve buttons, and quickly opening the valves of the pressure reducing valve group C and the pressure reducing valve group D;
step five: confirming that the pressure reducing valve group C or the pressure reducing valve group D is used as a main quick-opening valve button;
step six: and confirming a TRT interlocking button below the pressure reducing valve group C, and when the TRT set breaks down, opening a corresponding quick-opening valve in the quick-opening valve of the pressure reducing valve group C and the quick-opening valve of the pressure reducing valve group D according to the selected main quick-opening valve of the pressure reducing valve group C or the main quick-opening valve of the pressure reducing valve group D, wherein the other quick-opening valve is reserved.
5. The control method of the blast furnace top pressure regulating valve bank according to claim 4, characterized in that a pressure reducing valve bank C is confirmed as a main quick-opening valve button, when a TRT unit has a serious fault, (1) when the opening of a valve calculated by a TRT in real time is lower than 30%, the quick-opening valve of the pressure regulating valve bank C is opened to 30%, and meanwhile, a maintenance valve is also opened at the same time, so that the opening speed of the quick-opening valve of the pressure regulating valve bank C is increased;
(2) when the opening of the valve calculated by the TRT in real time is larger than 60%, the pressure regulating valve group C is opened to 60% opening, and meanwhile, the maintenance valve is also opened at the same time, so that the opening speed of the quick opening of the pressure regulating valve group C is increased;
(3) when the opening of the valve calculated by the TRT in real time is between 30% and 60%, the quick opening valve of the pressure regulating valve group C is opened to the actual opening of the valve calculated by the TRT in real time, and meanwhile, the maintenance valve is also opened at the same time, so that the opening speed of the quick opening valve of the pressure regulating valve group C is increased;
(4) when the feedback change of the quick opening valve of the pressure regulating valve group C is not received after 1.5 seconds, the quick opening valve of the pressure regulating valve group D immediately executes the actions of (1), (2) and (3).
6. The control method of the blast furnace top pressure regulating valve group according to claim 1, wherein the pressure reducing valve group C is used as a regulating valve, and the first step is as follows: confirming a valve B withdrawing adjusting button of the pressure reducing valve group B by operating a human-computer interface;
step two: confirming that the pressure reducing valve group A is used as a range valve button, and using a range valve of the pressure reducing valve group A;
step three: confirming that the pressure reducing valve group C is used as a regulating valve button, and regulating the valve of the pressure reducing valve group C;
step four: inputting a target input value for confirmation in a white area beside an output frame of the pressure reducing valve group A, which is used as the top pressure setting below a range valve button;
step five: confirming that the pressure reducing valve group D is used as a quick-opening valve button, and quickly opening a valve for the pressure reducing valve group D;
step six: confirming a pressure reducing valve group D as a main quick-opening valve button;
step seven: the TRT unlock button below the pressure relief valve block D is confirmed.
7. The control method of the blast furnace top pressure regulating valve group according to claim 1, wherein the pressure reducing valve group D is used as a regulating valve, and the step one is as follows: confirming a valve B withdrawing adjusting button of the pressure reducing valve group B by operating a human-computer interface;
step two: confirming that the pressure reducing valve group A is used as a range valve button, and using a range valve of the pressure reducing valve group A;
step three: confirming that the pressure reducing valve group C is used as a quick-opening valve button, and quickly opening a valve for the pressure reducing valve group C;
step four: confirming the pressure reducing valve group C as a main quick-opening valve button;
step five: confirming a TRT unlocking button below the pressure reducing valve group C;
step six: confirming that the pressure reducing valve group D is used as a regulating valve button, and regulating the valve of the pressure reducing valve group D;
step seven: and a white area beside an output frame of the pressure reducing valve group A, which is used as the 'top pressure setting' below the range valve button, is input for confirming the target input value.
8. The control method of the blast furnace top pressure regulating valve group according to claim 1, wherein the pressure reducing valve group A, the pressure reducing valve group B, the pressure reducing valve group C and the pressure reducing valve group D are all provided with automatic or manual operation modes.
9. The control method for the blast furnace top pressure regulating valve bank according to claim 1, wherein the pressure reducing valve bank A is a pressure reducing valve bank DN900, the pressure reducing valve bank B is a pressure reducing valve bank DN600, the pressure reducing valve bank C is a pressure reducing valve bank ADN900, and the pressure reducing valve bank D is a pressure reducing valve bank ADN 900.
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| US4315619A (en) * | 1979-10-30 | 1982-02-16 | Ishikawajima-Harima Jukogyo Kabushiki Kaisha | Process and system for recovering top gas from blast furnace or the like |
| CN201292370Y (en) * | 2008-11-17 | 2009-08-19 | 武汉钢铁(集团)公司 | Blast furnace top pressure control rearrange apparatus |
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2020
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| US4315619A (en) * | 1979-10-30 | 1982-02-16 | Ishikawajima-Harima Jukogyo Kabushiki Kaisha | Process and system for recovering top gas from blast furnace or the like |
| CN201292370Y (en) * | 2008-11-17 | 2009-08-19 | 武汉钢铁(集团)公司 | Blast furnace top pressure control rearrange apparatus |
| CN101760573A (en) * | 2009-12-31 | 2010-06-30 | 中冶南方工程技术有限公司 | Method for controlling pressure of blast furnace top by adopting gas dry dust removing device |
| CN108796152A (en) * | 2018-06-07 | 2018-11-13 | 福建三钢闽光股份有限公司 | A kind of blast furnace top pressure auto-adjustment control method |
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