CN114294642B - Heat supply control method, control device and control system - Google Patents
Heat supply control method, control device and control system Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 79
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 443
- 238000005338 heat storage Methods 0.000 claims abstract description 185
- 238000010438 heat treatment Methods 0.000 claims description 53
- 238000012806 monitoring device Methods 0.000 claims description 14
- 238000009825 accumulation Methods 0.000 claims description 13
- 238000012935 Averaging Methods 0.000 claims description 9
- 230000002068 genetic effect Effects 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 abstract description 2
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
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- 238000012937 correction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
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Abstract
The application provides a heat supply control method, a control device and a control system, relates to the field of thermoelectric technology, and solves the problem that the current mode of controlling a heat storage system cannot meet the increasingly-changing heat supply requirement. The method comprises the following steps: determining the water supply starting time of the heat storage water tank according to the pre-established corresponding relation between different time and heat supply requirement; wherein, the corresponding relation is updated according to the daily heat supply data; and at the water feeding starting time, conveying the desalted water in the desalted water main pipeline to the heat storage water tank.
Description
Technical Field
The application relates to the field of thermoelectric technology, in particular to a heat supply control method, a control device and a control system.
Background
A heat storage system is generally added in a power plant to improve the heat efficiency. This heat accumulation system includes demineralized water heat accumulation case, when the power plant is in night low heat supply demand, carries partial demineralized water in the demineralized water trunk line to demineralized water heat accumulation case, then, carries partial exhaust steam in the backpressure machine exhaust steam pipeline to demineralized water heat accumulation case, utilizes steam heating demineralized water to with the demineralized water heat preservation after the heating store in this demineralized water heat accumulation case. When the power plant is in the daytime high heat supply demand, the hot demineralized water stored in the demineralized water heat storage box is conveyed to the deaerator to supply water for the unit, so that the steam quantity required by the deaerator for heating the demineralized water is reduced, and the heat efficiency is improved.
At present, the water feeding, heat accumulating and heat releasing processes of the demineralized water heat accumulating box are controlled by a single-loop control mode, and the heat supplying requirement of a power plant is continuously changed due to the fact that the single-loop control mode is controlled based on fixed parameters, so that the control mode has certain hysteresis, and the increasingly-changing heat supplying requirement cannot be met.
Disclosure of Invention
The invention provides a heat supply control method, a control device and a control system, which can be used for solving the problem that the mode of controlling a heat storage system in the prior art cannot meet the increasingly-changing heat supply requirement.
In a first aspect, an embodiment of the present application provides a heating control method, including:
determining the water supply starting time of the heat storage water tank according to the pre-established corresponding relation between different time and heat supply requirement; wherein, the corresponding relation is updated according to the daily heat supply data;
and at the water feeding starting time, conveying the desalted water in the desalted water main pipeline to the heat storage water tank.
Optionally, in one embodiment, after the delivering the demineralized water in the demineralized water main pipe to the thermal storage tank, the control method further includes: controlling the water level of the desalted water in the heat storage water tank to reach a target water level;
Before the water level of the demineralized water in the thermal storage water tank reaches the target water level, the control method further includes:
when the water level of the demineralized water in the heat storage water tank reaches a first water level, reducing the flow rate of the demineralized water conveyed to the heat storage water tank; wherein the first water level is lower than the target water level.
Optionally, in one embodiment, the control method further includes:
determining the heat storage starting time of the heat storage water tank according to the corresponding relation;
and at the beginning time of heat accumulation, conveying the steam discharged by the back pressure machine to the heat accumulation water tank.
Optionally, in one embodiment, after the delivering the steam exhausted by the back pressure machine to the heat storage water tank, the control method further includes: controlling the temperature of the desalted water in the heat storage water tank to reach a target temperature;
before the temperature of the demineralized water in the thermal storage tank reaches the target temperature, the control method further includes:
when the temperature of the desalted water in the heat storage water tank reaches a first temperature, reducing the flow rate of the steam delivered to the heat storage water tank; wherein the first temperature is lower than the target temperature.
Optionally, in one embodiment, the control method further includes:
Determining the heat release starting time of the heat storage water tank according to the corresponding relation;
and at the beginning time of heat release, the desalted water in the heat storage water tank is conveyed to a deaerator.
In a second aspect, embodiments of the present application provide a heating control device, including:
the determining module is used for determining the water supply starting time of the heat storage water tank according to the pre-established corresponding relation between different times and heat supply requirements; wherein, the corresponding relation is updated according to the daily heat supply data;
and the control module is used for conveying the desalted water in the desalted water main pipeline to the heat storage water tank at the water supply starting moment.
Optionally, in one embodiment, the determining module is further configured to determine a heat storage start time of the heat storage tank according to the correspondence relationship;
and the control module is also used for conveying the steam discharged by the back pressure machine to the heat storage water tank at the heat storage starting moment.
Optionally, in one embodiment, the determining module is further configured to determine a heat release start time of the thermal storage tank according to the correspondence;
and the control module is also used for conveying desalted water in the heat storage water tank to the deaerator at the starting moment of heat release.
In a third aspect, embodiments of the present application provide a heating control system, where the system includes a demineralized water main pipe, a deaerator, a back press, a steam exhaust pipe, a demineralized water inlet pipe, a heat storage water tank, a demineralized water outlet pipe, a steam inlet pipe, a first valve, a first controller, a second valve, a second controller, a third valve, a third controller, and a heating control device according to the second aspect of embodiments of the present application;
wherein, the outlet of the desalted water main pipeline is communicated with the inlet of the deaerator; the outlet of the back press is communicated with the inlet of the steam exhaust pipeline;
the inlet of the desalted water inlet pipeline is communicated with the desalted water main pipeline, and the outlet of the desalted water inlet pipeline is communicated with the inlet of the heat storage water tank; the first valve is arranged on the desalted water introducing pipeline, the first valve is connected with the first controller, and the first controller is connected with the heat supply control device;
the inlet of the desalted water leading-out pipeline is communicated with the outlet of the heat storage water tank, and the outlet of the desalted water leading-out pipeline is communicated with the inlet of the deaerator; the second valve is arranged on the desalted water leading-out pipeline, the second valve is connected with the second controller, and the second controller is connected with the heat supply control device;
An inlet of the steam introducing pipeline is communicated with the steam exhaust pipeline, and an outlet of the steam introducing pipeline is communicated with an inlet of the heat storage water tank; the third valve is arranged on the steam introducing pipeline and connected with the third controller, and the third controller is connected with the heat supply control device.
Optionally, in one embodiment, the system further comprises a water level monitoring device and a temperature monitoring device,
the water level monitoring device and the temperature monitoring device are arranged on the heat storage water tank; the water level monitoring device and the temperature monitoring device are connected with the heat supply control device.
In a fourth aspect, embodiments of the present application provide an electronic device comprising a processor, a memory, and a program or instruction stored on the memory and running on the processor, which when executed by the processor, implements the steps of the method according to the first aspect.
In a fifth aspect, embodiments of the present application provide a readable storage medium having stored thereon a program or instructions which when executed by a processor implement the steps of the method according to the first aspect.
In a sixth aspect, embodiments of the present application provide a chip, where the chip includes a processor and a communication interface, where the communication interface is coupled to the processor, and where the processor is configured to execute a program or instructions to implement a method according to the first aspect.
The beneficial effects brought by the application are as follows:
in the embodiment of the application, the water supply starting time of the heat storage water tank is determined according to the corresponding relation between different preset time and the heat supply requirement; wherein, the corresponding relation is updated according to the daily heat supply data; at the water feeding starting moment, conveying desalted water in a desalted water main pipeline to the heat storage water tank; because the corresponding relation between different preset moments and the heat supply demands can be updated according to the heat supply data of each day, the corresponding relation can be changed along with the change of the heat supply demands which are changed day by day, and then the water supply starting moment of the heat storage water tank is determined based on the corresponding relation, and the water supply control is carried out according to the water supply starting moment, so that the heat supply demand condition of the day can be more attached.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. In the drawings:
Fig. 1 is a schematic flow chart of a heat supply control method according to an embodiment of the present application;
fig. 2 is a schematic flow chart of another heat supply control method according to an embodiment of the present application;
FIG. 3 is a schematic flow chart of another heat supply control method according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a heat supply control device according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a heating control system according to an embodiment of the present application;
reference numerals:
30-a heating control system; 301—a main demineralized water pipe; 302-a deaerator; 303-backing press; 304-a steam exhaust pipeline; 305-demineralized water introducing pipe; 306-a heat storage water tank; 307-desalted water extraction pipe; 308-steam introduction line; 309-a first valve; 310—a first controller; 311-a second valve; 312-a second controller; 313-third valve; 314-third controller.
Detailed Description
Technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application are within the scope of the protection of the present application.
As described in the background art above, at present, the water supply, heat accumulation, and heat release processes of the demineralized water heat storage tank are controlled by a single-loop control method, and since the single-loop control method is based on a fixed parameter, the fixed parameter includes when water supply is started, when heat accumulation is started, when heat release is started, and so on. Wherein the fixed parameters are constant, however, the heating requirements of the power plant are constantly changing, provided that the corresponding graphs of each day are not completely consistent, more or less different, on the basis of the heating requirements of the power plant at different times of day and at different times. Along with the continuous change of the heat supply demand of the power plant, the water feeding, heat storage and heat release processes are still controlled according to fixed parameters, and certain hysteresis exists, so that the continuous change of the heat supply demand cannot be met. For example, the fixed parameters include the moment when to start water feeding, the demineralized water heat storage tank is always controlled to start water feeding according to the moment, but with the gradual change of the heat supply requirement of the power plant, the moment may still have larger heat supply requirement, and if the demineralized water heat storage tank is still controlled to start water feeding at the moment, the situations that the demineralized water heat storage tank and the original heat supply system rob water to cause insufficient supply of the demineralized water of the original heat supply system and influence heat supply occur.
In view of this, embodiments of the present application provide a heating control method that can be used to solve the above-described problems. The heating control method provided in the embodiments of the present application will be described in detail below with reference to the accompanying drawings by way of specific examples.
As shown in fig. 1, the embodiment of the present application provides a heating control method that may be performed by an electronic device, in other words, the method may be performed by software or hardware installed on the electronic device, and the method may include the steps of:
step 101, determining the water supply starting time of a heat storage water tank according to the pre-established corresponding relation between different time and heat supply requirements; and updating the corresponding relation according to the daily heat supply data.
Wherein, the heat storage water tank can also be called as demineralized water heat storage tank.
In this embodiment of the present application, the pre-established correspondence between different moments and heat supply requirements may be established by the following method: analyzing big data by utilizing a genetic algorithm, specifically analyzing heat supply demands at different times of each day in historical heat supply, and further obtaining and storing corresponding relations between different times of the day and the heat supply demands; and then, continuously updating the corresponding relation according to the heat supply data of the subsequent day, namely, carrying out self-learning correction on the corresponding relation based on the heat supply demand change of the day.
The specific implementation can be as follows: allowing a machine to iteratively learn and count heat supply demands corresponding to a 24-hour whole-point time of a day to obtain a heat supply demand graph, and averaging the heat supply demand graph with a heat supply demand graph obtained in the previous day, wherein the averaging process is as follows: and averaging the heat supply demands corresponding to the same moment in the two heat supply demand graphs to obtain target heat supply demands corresponding to the same moment, further respectively obtaining target heat supply demands corresponding to different whole moment of 24 hours, and obtaining the pre-established corresponding relation between different moment and heat supply demands based on the target heat supply demands corresponding to different whole moment of 24 hours, wherein the corresponding relation can be specifically a graph corresponding to the heat supply demands at different moment. The heat supply demand graph obtained in the previous day can be obtained based on analysis of heat supply demands at different times of each day in historical heat supply, and can also be obtained according to experience values input by technicians.
The corresponding relation between the preset different moments and the heat supply requirement, which is obtained based on the target heat supply requirement corresponding to the different whole moment of 24 hours, can guide the heat supply control of the following day, and can determine the water supply starting moment of the heat storage water tank based on the corresponding relation. In addition, when the heat supply demand graph is determined on the following day, the corresponding relationship between the different preset moments and the heat supply demand, which is obtained based on the target heat supply demand corresponding to the different whole moments of 24 hours, may also be used as the initial heat supply demand graph, and the corresponding relationship is updated continuously according to the change of the heat supply demand of the following day. It should be understood that, counting the heat supply requirements corresponding to the whole hour of 24 hours a day to obtain 24 heat supply requirement values is only an example, in practical application, a graph can be obtained according to the heat supply requirements corresponding to the whole hour every two hours to obtain 12 heat supply requirement values, and then a curve fitting method is used to obtain a heat supply requirement curve corresponding to the whole hour of 24 hours a day approximately.
In this embodiment of the present application, the change situation of the heat supply demand of one day may be obtained according to the pre-established correspondence between different moments and the heat supply demand, for example, the peak period of one day heat supply and the valley period of one day heat supply may be obtained according to the pre-established graph corresponding to the heat supply demand at different moments. Generally, when the power plant is in the heat supply low-valley period, the load of the unit is relatively low, the demand of the desalted water is low, the back pressure machine supplies heat and discharges steam under the condition that the supply is more than required, at this time, redundant desalted water can be conveyed to the heat storage water tank, namely, part of desalted water in the desalted water main pipeline is conveyed to the heat storage water tank, then, part of steam in the steam discharge pipeline can be conveyed to the heat storage water tank subsequently, the desalted water is heated, and the heated desalted water is stored in the heat storage water tank in a heat preservation manner.
For example, according to the graph, two heat supply peak periods can be obtained, namely, 9 to 12 points in the first peak period and 14 to 18 points in the second peak period, and 2 to 6 points in the heat supply valley period, so that the water supply of the heat storage water tank can be completed in the heat supply valley period, that is, the starting time of the heat supply valley period can be determined as the water supply starting time. The starting moment of the heat supply valley period can correspond to the critical point of the reduction of the demineralized water consumption of the original heat supply system of the power plant, the reduction of the demineralized water consumption of the original heat supply system of the power plant indicates that the heat supply demand starts to be reduced, the starting of the heat supply valley period can be indicated, and at the moment, part of the demineralized water is conveyed to the heat storage tank for water supply, so that the heat storage tank can be used for storing heat energy later when the heat supply of the original heat supply system of the power plant is not affected. The water supply start time may be after the heat supply off-peak period start time and before the heat supply off-peak period end time.
And 102, at the starting time of water supply, conveying the desalted water in the desalted water main pipeline to the heat storage water tank.
The demineralized water main pipeline can be a pipeline for conveying demineralized water to the deaerator in the original heat supply system of the power plant.
In this application embodiment, when carrying demineralized water to the heat storage water tank, can also further carry out real-time supervision to the heat supply demand of power plant. When the heat supply low-valley period starts, the heat supply demand of the power plant may continuously decrease, and as the heat supply demand is lower, the demineralized water required by the original heat supply system is smaller and smaller, and the demineralized water flow rate conveyed to the heat storage water tank can be controlled to be larger and larger, so that water feeding is completed as soon as possible. In practical application, the demineralized water flow rate conveyed to the heat storage water tank is controlled to be larger and larger under the condition that the original heat supply system is not affected, so that the situation of water robbing with the original heat supply system can be avoided, and enough demineralized water can be stored for subsequent heat storage and energy storage.
It can be understood that by adopting the heat supply control method provided by the embodiment of the application, the water supply starting time of the heat storage water tank is determined according to the pre-established corresponding relation between different times and heat supply requirements; wherein, the corresponding relation is updated according to the daily heat supply data; at the water feeding starting moment, conveying desalted water in a desalted water main pipeline to the heat storage water tank; because the corresponding relation between different preset moments and the heat supply demands can be updated according to the heat supply data of each day, the corresponding relation can be changed along with the change of the heat supply demands which are changed day by day, and then the water supply starting moment of the heat storage water tank is determined based on the corresponding relation, and the water supply control is carried out according to the water supply starting moment, so that the heat supply demand condition of the day can be more attached.
In order to avoid excessive demineralized water in the thermal storage tank during water supply, in one embodiment, after the demineralized water in the demineralized water main pipe is delivered to the thermal storage tank in step 102, the heating control method provided in this embodiment further includes: controlling the water level of the desalted water in the heat storage water tank to reach a target water level; before the water level of the demineralized water in the heat storage water tank reaches the target water level, the heat supply control method provided by the embodiment of the application further includes: when the water level of the demineralized water in the heat storage water tank reaches a first water level, reducing the flow rate of the demineralized water conveyed to the heat storage water tank; wherein the first water level is lower than the target water level.
In this embodiment of the present application, the target water level and the first water level may be set according to actual requirements, where the first water level is close to the target water level, for example, the target water level is 15.5m, and the first water level may be 15m.
It can be appreciated that through the above-mentioned scheme, when the water level of demineralized water in the heat storage water tank reaches first water level, reduce the flow of the demineralized water that carries to the heat storage water tank can make the demineralized water in the heat storage water tank slowly reach target water level, and then can avoid controlling the demineralized water in the heat storage water tank that untimely leads to and surpass target water level.
In order to further avoid that the demineralized water in the thermal storage tank exceeds the target water level, in the above embodiment, when the water level of the demineralized water in the thermal storage tank reaches the first water level, the flow rate of the demineralized water delivered to the thermal storage tank is reduced, specifically, when the water level of the demineralized water in the thermal storage tank reaches the first water level, as the water level of the demineralized water in the thermal storage tank approaches the target water level, the flow rate of the demineralized water delivered to the thermal storage tank is reduced; then the demineralized water in the thermal storage tank may reach the target water level more and more slowly.
After the heat storage water tank finishes water supply, in an implementation manner, the heat supply control method provided by the embodiment of the application further includes:
and step 103, determining the heat storage starting time of the heat storage water tank according to the corresponding relation.
And 104, at the beginning time of heat accumulation, conveying the steam discharged by the back pressure machine to the heat accumulation water tank.
And the steam discharged by the back pressure machine is conveyed to the heat storage water tank and can be used for heating desalted water in the heat storage water tank, so that heat storage and energy storage are performed.
In this embodiment of the present application, according to the correspondence, a heat storage start time of the heat storage water tank is determined, and specifically reference may be made to the foregoing process of determining the water supply start time: according to the pre-established corresponding relation between different moments and the heat supply requirement, the change condition of the heat supply requirement of one day can be obtained, for example, according to the pre-established curve graph corresponding to the heat supply requirement at different moments, the heat supply peak time of one day and the heat supply valley time of one day can be obtained. The heat storage start time is located in a heat supply valley period, and more specifically, the heat storage start time may be a water supply end time of the heat storage water tank, or may be after the water supply end time of the heat storage water tank. According to the corresponding relation, the longest heating time and the shortest heating time can be determined, wherein the longest heating time can be from the water feeding ending time of the heat storage water tank to the starting time of the first peak period; the shortest heating time can be from the water feeding ending time of the heat storage water tank to the heat supply valley period ending time.
The step 103 may occur simultaneously with the step 101, or after the step 101, etc., and the embodiment of the present application does not limit the occurrence time of the step 103, as long as the heat storage start time can be determined in time, and the heat storage and energy storage of the heat storage water tank are not affected.
When the steam exhausted by the back pressure machine is conveyed to the heat storage water tank, the heat supply requirement of the power plant can be further monitored in real time. As the heating valley period begins, the heating demand of the power plant may continue to decrease or increase after undergoing a decrease; as the heat supply requirement is lower, more part of steam in the exhaust steam of the back pressure machine can be conveyed to the heat storage water tank, namely, the flow rate of the steam conveyed to the heat storage water tank is controlled to be larger and larger; when the heat supply requirement reaches the lowest valley and then rises, the part of the exhaust steam of the back pressure machine, which is conveyed to the heat storage water tank, can be gradually reduced; the heat energy of the redundant steam of the original heat supply system can be stored, and meanwhile, the energy supply of the original heat supply system is not influenced.
In practical application, the heat storage can be finished before the first peak period starts, and in a more preferable mode, the heat storage is finished in the heat supply valley period, so that the heat supply of the original heat supply system in the normal period can be further ensured.
It can be appreciated that by adopting the scheme, the heat storage starting time of the heat storage water tank is determined according to the corresponding relation between different preset time and heat supply requirement, and the steam discharged by the back pressure machine is conveyed to the heat storage water tank at the heat storage starting time; because the corresponding relation between different preset moments and the heat supply requirement can be updated according to the heat supply data of each day, the corresponding relation can be changed along with the change of the heat supply requirement which is changed day by day, and then the heat storage starting moment determined based on the corresponding relation and the heat storage control is carried out according to the heat storage starting moment, so that the heat supply requirement condition of the current day can be more attached.
In order to avoid that the heat stored in the heat storage water tank affects the heat supply of the original heat supply system excessively during heat storage, in one embodiment, after the steam exhausted by the back pressure machine is conveyed to the heat storage water tank in step 104, the heat supply control method provided in the embodiment of the present application further includes: controlling the temperature of the desalted water in the heat storage water tank to reach a target temperature; before the temperature of the demineralized water in the heat storage water tank reaches the target temperature, the heat supply control method provided by the embodiment of the application further includes: when the temperature of the desalted water in the heat storage water tank reaches a first temperature, reducing the flow rate of the steam delivered to the heat storage water tank; wherein the first temperature is lower than the target temperature.
In this embodiment of the present application, the target temperature and the first temperature may be set according to actual requirements, where the first temperature approaches the target temperature, for example, the target temperature is 95 ℃, and the first temperature may be 90 ℃.
It can be appreciated that through the above-mentioned scheme, when demineralized water in the heat storage water tank reaches first temperature, reduce the flow of carrying to the steam of heat storage water tank can make the demineralized water in the heat storage water tank slowly reach target temperature, and then can avoid controlling the demineralized water in the heat storage water tank that untimely leads to and surpass target temperature.
In order to further avoid that the temperature of the demineralized water in the thermal storage tank exceeds the target temperature, the flow rate of the steam delivered to the thermal storage tank is reduced when the temperature of the demineralized water in the thermal storage tank reaches the first temperature in the above-described embodiment, specifically, when the temperature of the demineralized water in the thermal storage tank reaches the first temperature, the flow rate of the steam delivered to the thermal storage tank is smaller as the temperature of the demineralized water in the thermal storage tank approaches the target temperature; then the demineralized water in the thermal storage tank may reach the target temperature more and more slowly.
After the heat storage is completed in the heat storage water tank, in an implementation manner, the heat supply control method provided in the embodiment of the application further includes:
And 105, determining the heat release starting time of the heat storage water tank according to the corresponding relation.
And 106, conveying desalted water in the heat storage water tank to a deaerator at the beginning time of heat release.
In this embodiment of the present application, the heat release start time of the heat storage water tank is determined according to the correspondence relation, and specifically reference may be made to the foregoing process of determining the water supply start time: according to the pre-established corresponding relation between different moments and the heat supply requirement, the change condition of the heat supply requirement of one day can be obtained, for example, according to the pre-established graph corresponding to the heat supply requirement at different moments, the heat supply peak time of one day and the heat supply valley time of one day can be obtained. The heat release start time is located in the heat supply peak period (e.g., at 9 to 12 points in the first peak period and/or at 14 to 18 points in the second peak period).
The step 105 may occur simultaneously with the steps 101 and 103, or after the steps 101 and 103, etc., and the embodiment of the present application does not limit the occurrence time of the step 105, as long as the heat release start time can be determined in time, and the heat supply of the heat storage tank to the original heat supply system in the heat supply peak period is not affected.
When desalted water in the heat storage water tank is conveyed to the deaerator, the heat supply requirement of the power plant can be further monitored in real time. With the beginning of the heat supply peak period, the heat supply demand of the power plant may continuously rise or decrease after rising; as the heat supply requirement is higher and higher, the flow of desalted water output by the heat storage water tank can be increased; when the heat supply demand is reduced after reaching the highest peak, the flow of desalted water output by the heat storage water tank can be gradually reduced; the heat release of the heat storage water tank can be more matched with the heat supply demand change of the original heat supply system in the heat supply peak period.
In practical application, the heat release of the heat storage water tank can be finished when the first peak period is finished, the heat storage water tank continues to start to release heat when the second peak period is started, and the heat release of the heat storage water tank is finished when the second peak period is finished.
It can be appreciated that by adopting the scheme, the heat release starting time of the heat storage water tank is determined according to the corresponding relation; at the beginning of heat release, the desalted water in the heat storage water tank is conveyed to a deaerator; because the corresponding relation between different pre-established moments and the heat supply demands can be updated according to the heat supply data of each day, the corresponding relation can be changed along with the change of the heat supply demands which are changed day by day, and then the heat release starting moment determined based on the corresponding relation and the heat release control is carried out according to the heat release starting moment, so that the heat supply demand condition of the day can be more attached.
In one embodiment, after step 106 of delivering the demineralized water in the thermal storage tank to the deaerator, the heating control method provided in the embodiment of the present application further includes: and stopping conveying the desalted water in the heat storage water tank to the deaerator when the water level of the desalted water in the heat storage water tank reaches a second water level, and waiting for next water feeding and heat storage, wherein the second water level is lower than the first water level. The second water level can be set according to actual requirements, for example, the second water level is 0.8m.
It can be appreciated that by adopting the scheme provided by the embodiment of the application, the self-consumption of the deaerator for heating deaerated water can be reduced during the heating peak time, namely, the steam consumption is reduced, so that the heat efficiency of the unit is improved. When the unit is in the heat supply valley period, the back press can still be ensured to run at a higher load, so that the occurrence of an event that the unit is forced to stop due to low load can be avoided. Meanwhile, when the demineralized water system of the original heating system is abnormal, the demineralized water in the heat storage water tank can be utilized to win time for overhauling and recovering the demineralized water system of the original heating system, so that the reliability of the demineralized water system is improved. In addition, the water feeding and heat storage process of the heat storage water tank can also occur in a period with lower heat supply demand in the daytime, so that the exhaust steam loss caused by sudden drop of the heat supply demand in the daytime can be avoided. In practical application, when the night heating requirement is low, the boiler is in a low-load stage, so that the chemical reaction of nitrogen oxides is seriously influenced, and the phenomenon of unqualified environment-friendly emission is possibly caused; by applying the scheme provided by the embodiment, the night self-use steam consumption can be improved, the purpose of improving the output of the night boiler is achieved, and the treatment capacity of nitrogen oxides at the outlet of the boiler in the night heat supply valley period can be improved.
It should be noted that, in the heat supply control method provided in the embodiment of the present application, the execution body may be a heat supply control device. In this embodiment, a heating control device executing a heating control method is taken as an example, and the heating control device provided in this embodiment of the application is described.
The embodiment of the present application further provides a heat supply control device 20, as shown in fig. 4, where the heat supply control device 20 includes:
the determining module 201 is configured to determine a water supply start time of the thermal storage tank according to a pre-established correspondence between different times and heat supply requirements; and updating the corresponding relation according to the daily heat supply data.
In this embodiment of the present application, the pre-established correspondence between different moments and heat supply requirements may be established by the following method: analyzing big data by utilizing a genetic algorithm, specifically analyzing heat supply demands at different times of each day in historical heat supply, and further obtaining and storing corresponding relations between different times of the day and the heat supply demands; and then, continuously updating the corresponding relation according to the heat supply data of the subsequent day, and performing self-learning correction by utilizing the change of the heat supply requirement of the day.
In this embodiment of the present application, the change situation of the heat supply demand of one day may be obtained according to the pre-established correspondence between different moments and the heat supply demand, for example, the peak period of one day heat supply and the valley period of one day heat supply may be obtained according to the pre-established graph corresponding to the heat supply demand at different moments. The water supply to the heat storage tank may be completed in the heat supply low valley period, that is, the heat supply low valley period start time may be determined as the water supply start time. The starting moment of the heat supply valley period can correspond to the critical point of the reduction of the demineralized water consumption of the original heat supply system of the power plant, the reduction of the demineralized water consumption of the original heat supply system of the power plant indicates that the heat supply demand starts to be reduced, the starting of the heat supply valley period can be indicated, and at the moment, part of the demineralized water is conveyed to the heat storage tank for water supply, so that the heat storage tank can be used for storing heat energy later when the heat supply of the original heat supply system of the power plant is not affected. The water supply start time may be after the heat supply off-peak period start time and before the heat supply off-peak period end time.
And the control module 202 is used for conveying the desalted water in the desalted water main pipeline to the heat storage water tank at the water supply starting moment.
In this application embodiment, when carrying demineralized water to the heat storage water tank, can also further carry out real-time supervision to the heat supply demand of power plant. When the heat supply low-valley period starts, the heat supply demand of the power plant may continuously decrease, and as the heat supply demand is lower, the demineralized water required by the original heat supply system is smaller and smaller, and the demineralized water flow rate conveyed to the heat storage water tank can be controlled to be larger and larger, so that water feeding is completed as soon as possible. In practical application, the demineralized water flow rate conveyed to the heat storage water tank is controlled to be larger and larger under the condition that the original heat supply system is not affected, so that the situation of water robbing with the original heat supply system can be avoided, and enough demineralized water can be stored for subsequent heat storage and energy storage.
It can be understood that, with the heat supply control device 20 provided in the embodiment of the present application, the water supply start time of the heat storage tank is determined according to the corresponding relationship between different preset times and the heat supply requirement; wherein, the corresponding relation is updated according to the daily heat supply data; at the water feeding starting moment, conveying desalted water in a desalted water main pipeline to the heat storage water tank; because the corresponding relation between different preset moments and the heat supply demands can be updated according to the heat supply data of each day, the corresponding relation can be changed along with the change of the heat supply demands which are changed day by day, and then the water supply starting moment of the heat storage water tank is determined based on the corresponding relation, and the water supply control is carried out according to the water supply starting moment, so that the heat supply demand condition of the day can be more attached.
In one embodiment, the control module 202 is further configured to control the water level of the desalinated water in the thermal storage tank to a target water level after the desalinated water in the main desalinated water pipe is delivered to the thermal storage tank. The control module 202 is further configured to reduce the flow of demineralized water delivered to the thermal storage tank when the level of demineralized water in the thermal storage tank reaches a first level before the level of demineralized water in the thermal storage tank reaches the target level; wherein the first water level is lower than the target water level.
In one embodiment, the determining module 201 is further configured to determine a heat storage start time of the heat storage tank according to the correspondence relationship. The control module 202 is further configured to deliver the steam exhausted from the back pressure machine to the thermal storage water tank at the thermal storage start time.
In one embodiment, the control module 202 is further configured to control the temperature of the demineralized water in the thermal storage tank to a target temperature after the delivery of the backpressure machine vented steam to the thermal storage tank. The control module 202 is further configured to reduce the flow of steam delivered to the thermal storage tank when the temperature of the demineralized water in the thermal storage tank reaches a first temperature before the temperature of the demineralized water in the thermal storage tank reaches the target temperature; wherein the first temperature is lower than the target temperature.
In one embodiment, the determining module 201 is further configured to determine a heat release start time of the thermal storage tank according to the correspondence relationship. The control module 202 is further configured to deliver demineralized water in the thermal storage tank to a deaerator at the start of the heat release.
Based on the heating control device 20 provided in the foregoing embodiments of the present application, the embodiments of the present application further provide a heating control system 30, as shown in fig. 5, where the heating control system 30 includes: a demineralized water main pipe 301, a deaerator 302, a back pressure machine 303, a steam exhaust pipe 304, a demineralized water introduction pipe 305, a heat storage water tank 306, a demineralized water extraction pipe 307, a steam introduction pipe 308, a first valve 309, a first controller 310, a second valve 311, a second controller 312, a third valve 313, a third controller 314, and a heat supply control device 20; the outlet of the desalted water main pipeline 301 is communicated with the inlet of the deaerator 302; the outlet of the back pressure machine 303 is communicated with the inlet of the steam exhaust pipeline 304; an inlet of the desalted water introducing pipe 305 is communicated with the desalted water main pipe 301, and an outlet of the desalted water introducing pipe 305 is communicated with an inlet of the heat storage water tank 306; the first valve 309 is disposed on the desalted water introducing pipe 305, the first valve 309 is connected to the first controller 310, and the first controller 310 is connected to the heating control device; an inlet of the desalted water leading-out pipe 307 is communicated with an outlet of the heat storage water tank 306, and an outlet of the desalted water leading-out pipe 307 is communicated with an inlet of the deaerator 302; the second valve 311 is arranged on the desalted water leading-out pipeline 307, the second valve 311 is connected with the second controller 312, and the second controller 312 is connected with the heat supply control device; an inlet of the steam introduction pipe 308 is communicated with the steam discharge pipe 304, and an outlet of the steam introduction pipe 308 is communicated with an inlet of the heat storage water tank 306; the third valve 313 is disposed on the steam introduction pipe 308, the third valve 313 is connected to the third controller 314, and the third controller 314 is connected to the heating control device.
The design parameters of the demineralized water introducing pipe 305 are as follows: pressure: 0.8Mpa, temperature: 40 ℃; the pipeline operating parameters are as follows: pressure: 0.6Mpa, temperature: 25 ℃. The pipe design parameters of the steam introduction pipe 308 are: pressure: 1.2Mpa, temperature: 320 ℃; the pipeline operating parameters are as follows: pressure: 0.958Mpa, temperature: 297.3 ℃. The pipeline design parameters of the demineralized water outlet pipeline 307 are: pressure: 0.8Mpa, temperature: 98 ℃; the pipeline operating parameters are as follows: pressure: 0.6Mpa, temperature: 95 ℃.
The first controller 310 may be configured to receive a control command sent from the heating control device 20, and control the opening of the first valve 309 according to the control command. The purpose of the second controller 312 and the third controller 314 is similar to that of the first controller 310, and will not be described again. Each controller is connected to the heat supply control device 20, specifically, may be connected to an electronic device corresponding to the heat supply control device 20.
For example, when the heating control device 20 determines the water supply start time and issues an instruction for delivering the desalted water in the desalted water main pipe 301 to the heat storage water tank 306 at the water supply start time, the first controller 310 may control the first valve 309 to open according to the instruction, so that a part of the desalted water in the desalted water main pipe 301 may be delivered to the heat storage water tank 306. When the heating control device 20 determines the heat storage start time, and sends a command to transfer the steam discharged from the back press 303 to the heat storage tank 306 at the heat storage start time, the third controller 314 may control the third valve 313 to open according to the command, so that the steam discharged from the back press 303 may be partially transferred to the heat storage tank 306. When the heating control device 20 determines the heat release start time, and issues a command to deliver the demineralized water in the heat storage tank 306 to the deaerator 302 at the heat release start time, the second controller 312 may control the second valve 311 to open according to the command, so that the demineralized water in the heat storage tank 306 may be delivered to the deaerator 302.
It can be appreciated that, with the heat supply control system 30 provided in this embodiment of the present application, since the pre-established correspondence between different moments and heat supply demands may be updated according to daily heat supply data, the correspondence may change along with the change of the heat supply demands that change day by day, so that the water supply start moment, the heat storage start moment and the heat release start moment of the heat storage tank determined based on the correspondence, and the heat supply demand conditions on the day may be more adhered by controlling according to the moments
Further, in one embodiment, the heating control system 30 further includes a water level monitoring device and a temperature monitoring device, both of which are disposed on the thermal storage tank; the water level monitoring device and the temperature monitoring device are connected with the heat supply control device.
It can be appreciated that by adopting the scheme, the water level and the temperature of the demineralized water in the heat storage water tank can be accurately controlled.
In practical applications, a flowmeter, a pumping device, etc. may be further provided in the heating control system 30 according to practical requirements.
Optionally, the embodiment of the present application further provides an electronic device, including a processor, a memory, and a program or an instruction stored in the memory and capable of running on the processor, where the program or the instruction when executed by the processor implements each process of the embodiment of the heating control method, and the process can achieve the same technical effect, so that repetition is avoided, and no description is repeated here.
It should be noted that, the electronic device in the embodiment of the present application includes a mobile electronic device and a non-mobile electronic device. Specifically, the electronic device includes, but is not limited to: the system comprises a radio frequency unit, a network module, an audio output unit, an input unit, a sensor, a display unit, a user input unit, an interface unit, a memory, a processor and the like. The processor is used for determining the water supply starting time of the heat storage water tank according to the pre-established corresponding relation between different times and heat supply requirements; wherein, the corresponding relation is updated according to the daily heat supply data; and at the water feeding starting time, conveying the desalted water in the desalted water main pipeline to the heat storage water tank.
The embodiment of the present application further provides a readable storage medium, where a program or an instruction is stored, and when the program or the instruction is executed by a processor, the processes of the embodiment of the heating control method are implemented, and the same technical effects can be achieved, so that repetition is avoided, and no further description is given here.
Wherein the processor is a processor in the electronic device described in the above embodiment. The readable storage medium includes a computer readable storage medium such as a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk or an optical disk, and the like.
The embodiment of the application further provides a chip, the chip includes a processor and a communication interface, the communication interface is coupled with the processor, the processor is used for running a program or an instruction, implementing each process of the embodiment of the heating control method, and achieving the same technical effect, so as to avoid repetition, and no redundant description is provided herein.
It should be understood that the chips referred to in the embodiments of the present application may also be referred to as system-on-chip chips, chip systems, or system-on-chip chips, etc.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may also be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solutions of the present application may be embodied essentially or in a part contributing to the prior art in the form of a computer software product stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk), comprising several instructions for causing a terminal (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the methods described in the embodiments of the present application.
The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those of ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are also within the protection of the present application.
Claims (10)
1. A heating control method, characterized in that the method comprises: determining the water supply starting time of the heat storage water tank according to the pre-established corresponding relation between different time and heat supply requirement; the corresponding relation between the different preset moments and the heat supply requirement is established by the following method: analyzing big data by utilizing a genetic algorithm, analyzing heat supply demands at different times of each day in the history heat supply, further obtaining and storing corresponding relations of the heat supply demands at different times of the day, continuously updating the corresponding relations according to the heat supply data of the subsequent day, specifically, enabling a machine to iteratively learn and count the heat supply demands corresponding to the whole time of the day, obtaining a heat supply demand graph, and averaging the heat supply demand graph and the heat supply demand graph obtained in the previous day, wherein the averaging process is as follows: averaging the heat supply demands corresponding to the same moment in the two heat supply demand graphs to obtain heat supply demands corresponding to the same moment, wherein the heat supply demands are respectively obtained, the heat supply demands are corresponding to different integral moments in the day, and the pre-established corresponding relation between the different moments and the heat supply demands is obtained based on the heat supply demands corresponding to the different integral moments in the day, wherein the corresponding relation is a graph corresponding to the heat supply demands at the different moments in the day, the graph comprises a heat supply valley period, and the starting moment of the heat supply valley period is the water supply starting moment; and at the water feeding starting time, conveying the desalted water in the desalted water main pipeline to the heat storage water tank.
2. A heat supply control method according to claim 1, wherein after the demineralized water in the demineralized water main pipe is sent to the heat storage tank, the control method further comprises: controlling the water level of the desalted water in the heat storage water tank to reach a target water level; before the water level of the demineralized water in the thermal storage water tank reaches the target water level, the control method further includes: when the water level of the demineralized water in the heat storage water tank reaches a first water level, reducing the flow rate of the demineralized water conveyed to the heat storage water tank; wherein the first water level is lower than the target water level.
3. A heating control method according to claim 2, characterized in that the control method further comprises: determining the heat storage starting time of the heat storage water tank according to the corresponding relation; and at the beginning time of heat accumulation, conveying the steam discharged by the back pressure machine to the heat accumulation water tank.
4. A heat supply control method according to claim 3, wherein after said delivering the steam discharged from the back pressure machine to the heat storage water tank, the control method further comprises: controlling the temperature of the desalted water in the heat storage water tank to reach a target temperature; before the temperature of the demineralized water in the thermal storage tank reaches the target temperature, the control method further includes: when the temperature of the desalted water in the heat storage water tank reaches a first temperature, reducing the flow rate of the steam delivered to the heat storage water tank; wherein the first temperature is lower than the target temperature.
5. A heat supply control method as claimed in claim 4, wherein the control method further comprises: determining the heat release starting time of the heat storage water tank according to the corresponding relation; and at the beginning time of heat release, the desalted water in the heat storage water tank is conveyed to a deaerator.
6. A heating control device, characterized in that the device comprises: the determining module is used for determining the water supply starting time of the heat storage water tank according to the pre-established corresponding relation between different times and heat supply requirements; the corresponding relation between the different preset moments and the heat supply requirement is established by the following method: analyzing big data by utilizing a genetic algorithm, analyzing heat supply demands at different times of each day in the history heat supply, further obtaining and storing corresponding relations of the heat supply demands at different times of the day, continuously updating the corresponding relations according to the heat supply data of the subsequent day, specifically, enabling a machine to iteratively learn and count the heat supply demands corresponding to the whole time of the day, obtaining a heat supply demand graph, and averaging the heat supply demand graph and the heat supply demand graph obtained in the previous day, wherein the averaging process is as follows: averaging the heat supply demands corresponding to the same moment in the two heat supply demand graphs to obtain heat supply demands corresponding to the same moment, wherein the heat supply demands are respectively obtained, the heat supply demands are corresponding to different integral moments in the day, and the pre-established corresponding relation between the different moments and the heat supply demands is obtained based on the heat supply demands corresponding to the different integral moments in the day, wherein the corresponding relation is a graph corresponding to the heat supply demands at the different moments in the day, the graph comprises a heat supply valley period, and the starting moment of the heat supply valley period is the water supply starting moment; and the control module is used for conveying the desalted water in the desalted water main pipeline to the heat storage water tank at the water supply starting moment.
7. The heating control device according to claim 6, wherein the determining module is further configured to determine a heat storage start time of the heat storage tank according to the correspondence relation; and the control module is also used for conveying the steam discharged by the back pressure machine to the heat storage water tank at the heat storage starting moment.
8. The heating control device according to claim 7, wherein the determining module is further configured to determine a heat release start time of the heat storage tank according to the correspondence relation; and the control module is also used for conveying desalted water in the heat storage water tank to the deaerator at the starting moment of heat release.
9. A heating control system, characterized in that the system comprises a main demineralized water pipe, a deaerator, a back press, a steam exhaust pipe, a demineralized water inlet pipe, a heat storage water tank, a demineralized water outlet pipe, a steam inlet pipe, a first valve, a first controller, a second valve, a second controller, a third valve, a third controller and a heating control device as claimed in claim 8; wherein, the outlet of the desalted water main pipeline is communicated with the inlet of the deaerator; the outlet of the back press is communicated with the inlet of the steam exhaust pipeline; the inlet of the desalted water inlet pipeline is communicated with the desalted water main pipeline, and the outlet of the desalted water inlet pipeline is communicated with the inlet of the heat storage water tank; the first valve is arranged on the desalted water introducing pipeline, the first valve is connected with the first controller, and the first controller is connected with the heat supply control device; the inlet of the desalted water leading-out pipeline is communicated with the outlet of the heat storage water tank, and the outlet of the desalted water leading-out pipeline is communicated with the inlet of the deaerator; the second valve is arranged on the desalted water leading-out pipeline, the second valve is connected with the second controller, and the second controller is connected with the heat supply control device; an inlet of the steam introducing pipeline is communicated with the steam exhaust pipeline, and an outlet of the steam introducing pipeline is communicated with an inlet of the heat storage water tank; the third valve is arranged on the steam introducing pipeline and connected with the third controller, and the third controller is connected with the heat supply control device.
10. A heating control system according to claim 9, further comprising a water level monitoring device and a temperature monitoring device, both of which are provided on the thermal storage tank; the water level monitoring device and the temperature monitoring device are connected with the heat supply control device.
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| JP2011089701A (en) * | 2009-10-22 | 2011-05-06 | Rinnai Corp | Hot water supply system |
| WO2011105881A2 (en) * | 2010-02-24 | 2011-09-01 | Genadij Pavlovskij | Centralized heat and hot water supply system |
| CN209196968U (en) * | 2018-11-26 | 2019-08-02 | 董伟兵 | A kind of accumulation of heat heating system suitable for retail users warming |
| CN112460668A (en) * | 2020-12-01 | 2021-03-09 | 福建晋江热电有限公司 | Undisturbed heat storage system and method for peak valley filling of back pressure type heat supply unit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2011089701A (en) * | 2009-10-22 | 2011-05-06 | Rinnai Corp | Hot water supply system |
| WO2011105881A2 (en) * | 2010-02-24 | 2011-09-01 | Genadij Pavlovskij | Centralized heat and hot water supply system |
| CN209196968U (en) * | 2018-11-26 | 2019-08-02 | 董伟兵 | A kind of accumulation of heat heating system suitable for retail users warming |
| CN112460668A (en) * | 2020-12-01 | 2021-03-09 | 福建晋江热电有限公司 | Undisturbed heat storage system and method for peak valley filling of back pressure type heat supply unit |
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