Automatic spray control method and device for wet electrostatic precipitator
By automatically controlling the spray cycle and duration of the wet electrocutor, combined with the frequency converter and the preset spray frequency curve, the problem of inaccurate spray control in the existing technology is solved, and efficient and water-saving spraying effect is achieved.
Patent Information
- Application Number
- CN202310065873.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-01-16
- Publication Date
- 2025-03-04
- Estimated Expiration
- 2043-01-16
AI Technical Summary
The spray control methods of existing wet electrocutors lack automation, resulting in unfixed spray time and cycle, resulting in waste of water resources and poor spraying effect.
The spray period is determined by obtaining the spray drain turbidity monitoring data to determine the spray duration; using the frequency converter pump and the preset spray frequency curve to dynamically adjust the spray frequency of the spray water pump.
It improves the efficiency and effectiveness of spraying, reduces the water consumption, ensures that the spraying water can cover most areas, and improves the operating efficiency and energy consumption management of wet electrocutors.
Smart Images
Figure CN116099663B_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of dust removal in the thermal power generation industry, and in particular to a spray automatic control method and device for a wet electrostatic precipitator. Background Art
[0002] At present, many power plants have added wet electrostatic precipitators after dry electrostatic precipitators and desulfurization towers. Wet electrostatic precipitators mainly treat wet flue gas with high water content or even saturation but relatively low dust concentration after the desulfurization tower. They have a good combined removal effect on pollutants such as sulfuric acid mist, fine dust, and heavy metals. In terms of removing dust captured on the anode plates / tubes, wet electrostatic precipitators adopt a regular spraying method. Several spray pipes are laid above the anode tube bundle and cathode wire inside the wet electrostatic precipitator. Many nozzles are installed at intervals in the spray pipes. When the spray water pump is turned on, high-pressure process water sprays out an umbrella-shaped stream from the nozzle, and the dust attached to the anode tube bundle and cathode wire is removed under the action of the flushing water.
[0003] In the related art, the time and cycle of a single spraying of a spray water pump are not fixed, nor are there uniform standards, and most of them rely on the experience of the operators. The time and cycle of a single spraying are too long, resulting in a large amount of flushing water and serious waste of water resources. The time and cycle of a single spraying are too short, resulting in poor spraying effect. The dust on the anode tube bundle and cathode wire will gradually harden on its surface, resulting in low operating efficiency and high energy consumption of the wet electrostatic precipitator. In addition, conventional spray water pumps use industrial frequency water pumps, which results in fixed spray water pressure and a relatively fixed fan-shaped area sprayed by the nozzle. Therefore, the area that can be sprayed is also relatively fixed, resulting in poor spraying effect. Summary of the invention
[0004] The present application aims to solve one of the technical problems in the related art at least to some extent.
[0005] To this end, one purpose of the present application is to propose an automatic spray control method for a wet electrostatic precipitator, by determining the current spray cycle of the wet electrostatic precipitator based on the current accumulated dust concentration at the inlet of the wet electrostatic precipitator and the current impedance between the anode tube bundle and the cathode line of the wet electrostatic precipitator, wherein the current spray cycle refers to the total time from the start time of the current spray to the start time of the next spray; obtaining the spray drainage turbidity monitoring data on the drainage pipeline of the wet electrostatic precipitator, and obtaining the current spray duration of the wet electrostatic precipitator based on the spray drainage turbidity monitoring data, wherein the current spray duration refers to the total time from the start time of the current spray to the end time of the current spray; according to the current spray cycle and the current spray duration, controlling the spray water pump of the wet electrostatic precipitator to perform spray dust removal, wherein the spray frequency of the spray water pump changes according to a preset spray frequency curve.
[0006] The second object of the present application is to provide an automatic spray control device for a wet electrostatic precipitator.
[0007] The third objective of the present application is to provide an electronic device.
[0008] A fourth object of the present application is to provide a non-transitory computer-readable storage medium.
[0009] A fifth object of the present application is to provide a computer program product.
[0010] To achieve the above-mentioned purpose, the first aspect of the embodiment of the present application proposes a method for automatic spray control of a wet electrostatic precipitator, including: determining the current spray cycle of the wet electrostatic precipitator according to the current accumulated dust concentration at the inlet of the wet electrostatic precipitator and the current impedance between the anode tube bundle and the cathode line of the wet electrostatic precipitator, wherein the current spray cycle refers to the total time from the start time of the current spray to the start time of the next spray; obtaining the spray drainage turbidity monitoring data on the drainage pipeline of the wet electrostatic precipitator, and obtaining the current spray duration of the wet electrostatic precipitator according to the spray drainage turbidity monitoring data, wherein the current spray duration refers to the total time from the start time of the current spray to the end time of the current spray; according to the current spray cycle and the current spray duration, controlling the spray water pump of the wet electrostatic precipitator to spray dust removal, wherein the spray frequency of the spray water pump changes according to a preset spray frequency curve.
[0011] According to one embodiment of the present application, the current spraying cycle of the wet electrostatic precipitator is determined according to the current accumulated dust concentration at the inlet of the wet electrostatic precipitator and the current impedance between the anode tube bundle and the cathode line of the wet electrostatic precipitator, including: determining a spraying cycle reference value corresponding to the wet electrostatic precipitator, a first normalized value corresponding to the accumulated current dust concentration, and a second normalized value corresponding to the current impedance; determining a first weighting coefficient corresponding to the first normalized value, and a second weighting coefficient corresponding to the second normalized value; determining the current spraying cycle according to the spraying cycle reference value, the first normalized value, the second normalized value, the first weighting coefficient, and the second weighting coefficient.
[0012] According to one embodiment of the present application, a method for obtaining a first normalized value corresponding to the cumulative amount of current dust concentration includes: re-sampling the dust concentration at the inlet of a wet electrostatic precipitator after the last spraying is completed, and obtaining the sampling period, number of samplings and real-time dust concentration value of the dust concentration at the inlet of the wet electrostatic precipitator obtained at each sampling; obtaining the historical average dust concentration value at the inlet of the wet electrostatic precipitator and the last spraying period corresponding to the last spraying; obtaining the first normalized value corresponding to the cumulative amount of the current dust concentration based on the real-time dust concentration value, sampling period, number of samplings, historical average dust concentration value and last spraying period.
[0013] According to one embodiment of the present application, a method for obtaining a second normalized value corresponding to a current impedance includes: obtaining a secondary voltage and a secondary current of a high-voltage power supply corresponding to a wet electrostatic precipitator; obtaining a reference impedance between an anode tube bundle and a cathode line when the wet electrostatic precipitator is in a no-load state; and obtaining a second normalized value corresponding to the current impedance based on the secondary voltage, the secondary current and the reference impedance.
[0014] According to an embodiment of the present application, the spray frequency curve adopts a sawtooth wave curve.
[0015] According to one embodiment of the present application, spray drainage turbidity monitoring data on the drainage pipeline of a wet electrostatic precipitator is obtained, and the current spraying duration of the wet electrostatic precipitator is obtained based on the spray drainage turbidity monitoring data, including: obtaining spray drainage turbidity monitoring data on the drainage pipeline of the wet electrostatic precipitator; querying the spray drainage turbidity monitoring data to determine the initial spray drainage turbidity corresponding to this spraying, the last initial spray drainage turbidity corresponding to the last spraying, and the last end spray drainage turbidity corresponding to the last spraying; obtaining the last spraying duration corresponding to the last spraying of the wet electrostatic precipitator; obtaining a preset spray drainage turbidity threshold and a preset time base; obtaining the current spraying duration of the wet electrostatic precipitator based on the last spraying duration, the initial spray drainage turbidity of this time, the last initial spray drainage turbidity, the last end spray drainage turbidity, the spray drainage turbidity threshold and the time base.
[0016] To achieve the above-mentioned purpose, the second embodiment of the present application proposes a spray automatic control device for a wet electrostatic precipitator, including: a first acquisition module, used to determine the current spray cycle of the wet electrostatic precipitator according to the current accumulated dust concentration at the inlet of the wet electrostatic precipitator and the current impedance between the anode tube bundle and the cathode line of the wet electrostatic precipitator, wherein the current spray cycle refers to the total duration from the start time of the current spray to the start time of the next spray; a second acquisition module, used to obtain the spray drainage turbidity monitoring data on the drainage pipeline of the wet electrostatic precipitator, and obtain the current spray duration of the wet electrostatic precipitator according to the spray drainage turbidity monitoring data, wherein the current spray duration refers to the total duration from the start time of the current spray to the end time of the current spray; a spray control module, used to control the spray water pump of the wet electrostatic precipitator to perform spray dust removal according to the current spray cycle and the current spray duration, wherein the spray frequency of the spray water pump changes according to a preset spray frequency curve.
[0017] According to one embodiment of the present application, the first acquisition module is also used to: determine a spray cycle reference value corresponding to the wet electrostatic precipitator, a first normalized value corresponding to the accumulated amount of the current dust concentration, and a second normalized value corresponding to the current impedance; determine a first weighting coefficient corresponding to the first normalized value, and a second weighting coefficient corresponding to the second normalized value; determine the current spray cycle based on the spray cycle reference value, the first normalized value, the second normalized value, the first weighting coefficient and the second weighting coefficient.
[0018] According to one embodiment of the present application, the first acquisition module is also used to: re-sample the dust concentration at the inlet of the wet electrostatic precipitator after the last spraying is completed, and obtain the sampling period, sampling times and real-time dust concentration value obtained at each sampling of the dust concentration at the inlet of the wet electrostatic precipitator; obtain the historical average dust concentration value at the inlet of the wet electrostatic precipitator and the last spraying period corresponding to the last spraying; obtain the first normalized value corresponding to the cumulative amount of the current dust concentration based on the real-time dust concentration value, sampling period, sampling times, historical average dust concentration value and the last spraying period.
[0019] According to one embodiment of the present application, the first acquisition module is also used to: obtain the secondary voltage and secondary current of the high-voltage power supply corresponding to the wet electrostatic precipitator; obtain the reference impedance between the anode tube bundle and the cathode line when the wet electrostatic precipitator is in a no-load state; and obtain a second normalized value corresponding to the current impedance based on the secondary voltage, secondary current and reference impedance.
[0020] According to an embodiment of the present application, the spray frequency curve adopts a sawtooth wave curve.
[0021] According to one embodiment of the present application, the second acquisition module is also used to obtain the spray drainage turbidity monitoring data on the drainage pipeline of the wet electrostatic precipitator; query the spray drainage turbidity monitoring data to determine the initial spray drainage turbidity corresponding to this spraying, the last initial spray drainage turbidity corresponding to the last spraying, and the last end spray drainage turbidity corresponding to the last spraying; obtain the last spraying duration corresponding to the last spraying of the wet electrostatic precipitator; obtain a preset spray drainage turbidity threshold and a preset time base; obtain the current spraying duration of the wet electrostatic precipitator based on the last spraying duration, the initial spray drainage turbidity of this time, the last initial spray drainage turbidity, the last end spray drainage turbidity, the spray drainage turbidity threshold and the time base.
[0022] To achieve the above-mentioned purpose, the third aspect embodiment of the present application proposes an electronic device, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to implement the automatic spray control method for a wet electrostatic precipitator as described in the first aspect embodiment of the present application.
[0023] To achieve the above-mentioned purpose, the fourth aspect embodiment of the present application proposes a non-transitory computer-readable storage medium storing computer instructions, wherein the computer instructions are used to implement the automatic spray control method of the wet electrostatic precipitator as described in the first aspect embodiment of the present application.
[0024] To achieve the above-mentioned purpose, the fifth embodiment of the present application proposes a computer program product, including a computer program, which, when executed by a processor, implements the automatic spray control method of the wet electrostatic precipitator as described in the first embodiment of the present application.
[0025] This application achieves at least the following beneficial effects:
[0026] The present application improves the efficiency of spraying and reduces the water consumption of spraying. The spraying frequency of the spray water pump changes according to a preset spraying frequency curve. As the spray water pressure changes, the shape of the water sprayed from the nozzle also changes continuously. Therefore, the spray water can cover most areas, greatly improving the effectiveness of spraying. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:
[0028] Figure 1 is a schematic diagram of an exemplary implementation of a spray automatic control method for a wet electrostatic precipitator shown in an embodiment of the present application;
[0029] Figure 2 is a schematic diagram of a spray frequency curve shown in an embodiment of the present application;
[0030] Figure 3 is a schematic diagram of an automatic spray control device for a wet electrostatic precipitator shown in one embodiment of the present application;
[0031] Figure 4 It is a schematic diagram of an electronic device shown in one embodiment of the present application. DETAILED DESCRIPTION
[0032] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.
[0033] Figure 1 is a schematic diagram of an exemplary embodiment of a spray automatic control method for a wet electrostatic precipitator shown in the present application, such as Figure 1 As shown, the automatic spray control method of the wet electrostatic precipitator comprises the following steps:
[0034] S101, determining the current spraying cycle of the wet electrostatic precipitator according to the current accumulated dust concentration at the inlet of the wet electrostatic precipitator and the current impedance between the anode tube bundle and the cathode wire of the wet electrostatic precipitator, wherein the current spraying cycle refers to the total duration from the start time of the current spraying to the start time of the next spraying.
[0035] Compared with dry electrostatic precipitators, the dust collection principles of wet electrostatic precipitators are basically the same. Both rely on high-voltage corona discharge to charge the dust. The charged dust adheres to the anode plate / tube under the action of the electric field force.
[0036] According to the operating principle of the wet electrostatic precipitator, the dust entering the wet electrostatic precipitator will be charged under the action of the electric field generated by the high-voltage power supply, and then captured by the anode tube bundle and the cathode wire. When the dust attached to the anode tube bundle and the cathode wire reaches a certain level, it needs to be washed away by spraying water to prevent it from hardening. The attachment rate of dust to the anode tube bundle and the cathode wire is related to the inlet dust concentration. Therefore, the accumulation of the current dust concentration at the inlet of the wet electrostatic precipitator over time is selected as one of the reference factors for the spraying cycle.
[0037] When dust adheres to the anode tube bundle and cathode wire, the impedance between the anode tube bundle and the cathode wire increases, and the impedance can be calculated from the secondary voltage and secondary current of the high-voltage power supply. Therefore, the current impedance between the anode tube bundle and the cathode wire of the wet electrostatic precipitator is selected as another reference factor for the spray cycle.
[0038] Specifically, the current spraying cycle of the wet electrostatic precipitator is determined according to the current accumulated dust concentration at the inlet of the wet electrostatic precipitator and the current impedance between the anode tube bundle and the cathode wire of the wet electrostatic precipitator, wherein the current spraying cycle refers to the total duration from the start time of the current spraying to the start time of the next spraying.
[0039] Among them, the current accumulated dust concentration at the inlet of the wet electrostatic precipitator and the current impedance between the anode tube bundle and the cathode line of the wet electrostatic precipitator can be based on the values in the initial stage of this spraying.
[0040] Among them, this spray cycle refers to the total duration from the start time of this spray to the start time of the next spray. For example, if the current spray cycle is determined to be 8 hours, the total duration from the start time of this spray to the start time of the next spray is 8 hours.
[0041] S102, obtaining the spray drainage turbidity monitoring data on the wet electrostatic precipitator drainage pipeline, and obtaining the current spraying duration of the wet electrostatic precipitator based on the spray drainage turbidity monitoring data, wherein the current spraying duration refers to the total duration from the start time of the current spraying to the end time of the current spraying.
[0042] In this application, a turbidity measuring device is added to the drainage pipeline of the spray water, and the spray drainage turbidity monitoring data is obtained by online monitoring. The spraying duration of the wet electrostatic precipitator is obtained based on the spray drainage turbidity monitoring data, wherein the spraying duration refers to the total time from the start time of the spraying to the end time of the spraying.
[0043] It is not difficult to understand that at the beginning of spraying, the turbidity of the spray drainage is relatively high, and as the spraying proceeds, the turbidity of the spray drainage gradually decreases.
[0044] As a feasible method, when the turbidity of the spray drainage drops below the set turbidity threshold, the current spraying is determined to be over, and the total duration from the start time to the end time of the current spraying is obtained as the current spraying duration of the current spraying.
[0045] S103, according to the current spraying cycle and the current spraying duration, controlling the spray water pump of the wet electrostatic precipitator to perform spray dust removal, wherein the spraying frequency of the spray water pump changes according to a preset spraying frequency curve.
[0046] In order to improve the effectiveness of spraying and reduce the water consumption of spraying, in this application, a variable frequency pump is used for the spray water pump, and the spray water pump of the wet electrostatic precipitator is controlled to perform spray dust removal according to the spray cycle and spray duration obtained as above.
[0047] Among them, the spraying frequency of the spray water pump changes according to a preset spraying frequency curve.
[0048] Among them, according to the spray cycle and spray duration obtained above, the meaning of controlling the spray water pump of the wet electrostatic precipitator to spray dust removal is: controlling the spray water pump to spray for the duration of the spraying obtained above, and controlling the spray water pump to start the next spraying from the start time of the spraying, after the spray cycle obtained above.
[0049] As a feasible method, the preset spray frequency curve can adopt a sawtooth curve. When spraying, the frequency of the spray water pump changes from low to high, then from high to low, and so on. As the spray water pressure changes, the shape of the water sprayed from the nozzle is also constantly changing, so that the spray water can cover most areas, greatly improving the efficiency of spraying.
[0050] The embodiment of the present application proposes an automatic spray control method for a wet electrostatic precipitator, which determines the current spray cycle of the wet electrostatic precipitator according to the current accumulated dust concentration at the inlet of the wet electrostatic precipitator and the current impedance between the anode tube bundle and the cathode line of the wet electrostatic precipitator, wherein the current spray cycle refers to the total duration from the start time of the current spray to the start time of the next spray; obtains the spray drainage turbidity monitoring data on the drainage pipeline of the wet electrostatic precipitator, and obtains the current spray duration of the wet electrostatic precipitator according to the spray drainage turbidity monitoring data, wherein the current spray duration refers to the total duration from the start time of the current spray to the end time of the current spray; and controls the spray water pump of the wet electrostatic precipitator to perform spray dust removal according to the current spray cycle and the current spray duration, wherein the spray frequency of the spray water pump changes according to a preset spray frequency curve. The present application improves the efficiency of spraying and reduces the water consumption of spraying. The spraying frequency of the spray water pump changes according to a preset spraying frequency curve. As the spray water pressure changes, the shape of the water sprayed from the nozzle also changes continuously. Therefore, the spray water can cover most areas, greatly improving the effectiveness of spraying.
[0051] Furthermore, the method for determining the current spraying cycle of the wet electrostatic precipitator specifically includes: determining a spraying cycle reference value T corresponding to the wet electrostatic precipitator base , which is generally obtained through field tests or operating experience; determine the first normalized value d corresponding to the cumulative amount of the current dust concentration corresponding to the wet electrostatic precipitator and the second normalized value R corresponding to the current impedance; determine the first weighting coefficient k1 corresponding to the first normalized value and the second weighting coefficient k2 corresponding to the second normalized value; according to the spray cycle reference value T base , the first normalized value d, the second normalized value R, the first weighted coefficient k1 and the second weighted coefficient k2, determine the current spraying cycle, the specific formula is:
[0052]
[0053] In the above formula, T is the calculated spray cycle, T base is the reference value of the spraying cycle, d is the first normalized value corresponding to the cumulative amount of the current dust concentration, R is the second normalized value corresponding to the current impedance, k1 is the first weighting coefficient, and k2 is the second weighting coefficient.
[0054] The method for obtaining the first normalized value d corresponding to the cumulative amount of the current dust concentration in the above formula includes: re-sampling the dust concentration at the entrance of the wet electrostatic precipitator after the last spraying is completed, and obtaining the sampling period Δt, the number of sampling times n and the real-time dust concentration value d obtained at each sampling of the dust concentration at the entrance of the wet electrostatic precipitator. i ; Get the historical average dust concentration value d at the entrance of the wet electrostatic precipitator avThe last spraying cycle T corresponding to the last spraying last ; According to the real-time dust concentration value d i , sampling period Δt, sampling times n, historical average dust concentration value d av and the last spray cycle T last , obtain the first normalized value corresponding to the current accumulation of dust concentration, the specific formula is:
[0055]
[0056] In the above formula, d is the first normalized value corresponding to the accumulation of the current dust concentration, d i is the real-time dust concentration value obtained at each sampling, Δt is the sampling period, d av is the historical average dust concentration at the inlet, T last This is the last spray cycle.
[0057] The method for obtaining the second normalized value R corresponding to the current impedance in the above formula includes: obtaining the secondary voltage U and the secondary current I of the high-voltage power supply corresponding to the wet electrostatic precipitator; obtaining the reference impedance R between the anode tube bundle and the cathode line when the wet electrostatic precipitator is in an unloaded state base ; According to the secondary voltage U, secondary current I and reference impedance R base , obtain the second normalized value corresponding to the current impedance, the specific formula is:
[0058]
[0059] In the above formula, R is the second normalized value corresponding to the current impedance, U is the secondary voltage of the high-voltage power supply, I is the secondary current of the high-voltage power supply, and R base It is the reference impedance of the wet electrostatic precipitator when it is no-load.
[0060] Further, optionally, the spray frequency curve in the present application adopts a sawtooth wave curve. Figure 2 is a schematic diagram of a spray frequency curve shown in this application, such as Figure 2 As shown, f(h) is the highest frequency of the sprinkler pump. Optionally, f(h) can be the power frequency of 50Hz. f(l) is the lowest frequency of the sprinkler pump. f(l) is related to the type of water pump, pipeline resistance and other factors. It can be obtained through on-site testing to ensure that the sprinkler water has a relatively obvious pressure at this frequency. t is the duration of this sprinkler. It is not difficult to understand that when the sprinkler pump sprays according to the spray frequency curve, the frequency of the sprinkler pump changes from low to high, and then from high to low, and so on. As the spray water pressure changes, the shape of the water sprayed from the nozzle is also constantly changing, so that the spray water can cover most areas, greatly improving the efficiency of the spray.
[0061] Furthermore, the method for obtaining the current spraying duration of the wet electrostatic precipitator specifically includes: obtaining the spray drainage turbidity monitoring data on the wet electrostatic precipitator drainage pipeline; querying the spray drainage turbidity monitoring data to determine the current initial spray drainage turbidity m0 corresponding to the current spraying, the previous initial spray drainage turbidity m0 corresponding to the previous spraying last.0 And the turbidity of the last spray drainage corresponding to the last spray m last.1 ; Get the last spraying time t corresponding to the last spraying of the wet electrostatic precipitator last ; Get the preset spray drainage turbidity threshold m l And the preset time base t step1 and t step2 ; According to the last spraying time t last , the initial spray drainage turbidity m0, the last initial spray drainage turbidity m last.0 , Turbidity of the last spray drainage m last.1 , Spray drainage turbidity threshold m l and time base t step1 and t step2 , get the spraying time of the wet electrostatic precipitator, the specific formula is:
[0062]
[0063] Among them, t is the duration of this spraying, t last is the duration of the last spraying, m0 is the initial spraying drainage turbidity corresponding to the initial stage of this spraying, m last.0 is the initial spray drainage turbidity corresponding to the initial stage of the last spray, m last.1 The turbidity of the final spray drainage at the end of the last spraying stage, m l is the turbidity threshold of spray drainage, t step1 and t step2 The time base.
[0064] Figure 3 Schematic diagram of a spray automatic control device for a wet electrostatic precipitator shown in the present application, such as Figure 3 As shown, the automatic spray control device 300 of the wet electrostatic precipitator includes a first acquisition module 301, a second acquisition module 302 and a spray control module 303, wherein:
[0065] The first acquisition module 301 is used to determine the current spraying cycle of the wet electrostatic precipitator according to the current dust concentration accumulation at the inlet of the wet electrostatic precipitator and the current impedance between the anode tube bundle and the cathode line of the wet electrostatic precipitator, wherein the current spraying cycle refers to the total time from the start time of the current spraying to the start time of the next spraying;
[0066] The second acquisition module 302 is used to obtain the spray drainage turbidity monitoring data on the wet electrostatic precipitator drainage pipeline, and obtain the current spraying duration of the wet electrostatic precipitator according to the spray drainage turbidity monitoring data, wherein the current spraying duration refers to the total duration from the start time of the current spraying to the end time of the current spraying;
[0067] The spray control module 303 is used to control the spray water pump of the wet electrostatic precipitator to spray dust removal according to the current spray cycle and the current spray duration, wherein the spray frequency of the spray water pump changes according to a preset spray frequency curve.
[0068] This device improves the efficiency of spraying and reduces the water consumption of spraying. The spraying frequency of the spray water pump changes according to a preset spraying frequency curve. As the spraying water pressure changes, the shape of the water sprayed from the nozzle also changes continuously, so that the spray water can cover most areas, greatly improving the effectiveness of spraying.
[0069] According to one embodiment of the present application, the first acquisition module 301 is also used to: determine a spray cycle reference value corresponding to the wet electrostatic precipitator, a first normalized value corresponding to the current accumulated dust concentration, and a second normalized value corresponding to the current impedance; determine a first weighting coefficient corresponding to the first normalized value, and a second weighting coefficient corresponding to the second normalized value; determine the current spray cycle based on the spray cycle reference value, the first normalized value, the second normalized value, the first weighting coefficient, and the second weighting coefficient.
[0070] According to one embodiment of the present application, the first acquisition module 301 is also used to: re-sample the dust concentration at the inlet of the wet electrostatic precipitator after the last spraying is completed, and obtain the sampling period, sampling times and real-time dust concentration value obtained at each sampling of the dust concentration at the inlet of the wet electrostatic precipitator; obtain the historical average dust concentration value at the inlet of the wet electrostatic precipitator and the last spraying period corresponding to the last spraying; obtain the first normalized value corresponding to the cumulative amount of the current dust concentration based on the real-time dust concentration value, sampling period, sampling times, historical average dust concentration value and the last spraying period.
[0071] According to one embodiment of the present application, the first acquisition module 301 is also used to: obtain the secondary voltage and secondary current of the high-voltage power supply corresponding to the wet electrostatic precipitator; obtain the reference impedance between the anode tube bundle and the cathode line when the wet electrostatic precipitator is in a no-load state; and obtain a second normalized value corresponding to the current impedance based on the secondary voltage, secondary current and reference impedance.
[0072] According to an embodiment of the present application, the spray frequency curve adopts a sawtooth wave curve.
[0073] According to one embodiment of the present application, the second acquisition module 302 is also used to obtain the spray drainage turbidity monitoring data on the drainage pipeline of the wet electrostatic precipitator; query the spray drainage turbidity monitoring data to determine the initial spray drainage turbidity corresponding to this spraying, the last initial spray drainage turbidity corresponding to the last spraying, and the last end spray drainage turbidity corresponding to the last spraying; obtain the last spraying duration corresponding to the last spraying of the wet electrostatic precipitator; obtain a preset spray drainage turbidity threshold and a preset time base; obtain the current spraying duration of the wet electrostatic precipitator based on the last spraying duration, the initial spray drainage turbidity of this time, the last initial spray drainage turbidity, the last end spray drainage turbidity, the spray drainage turbidity threshold and the time base.
[0074] In order to implement the above embodiment, the present application embodiment also proposes an electronic device 400, such as Figure 4 As shown, the electronic device 400 includes: a processor 401 and a memory 402 communicatively connected to the processor, the memory 402 stores instructions executable by at least one processor, and the instructions are executed by at least one processor 401 to implement the automatic spray control method of the wet electrostatic precipitator as shown in the above embodiment.
[0075] In order to implement the above embodiment, the embodiment of the present application also proposes a non-transitory computer-readable storage medium storing computer instructions, wherein the computer instructions are used to enable the computer to implement the automatic spray control method of the wet electrostatic precipitator as shown in the above embodiment.
[0076] In order to implement the above embodiments, the embodiments of the present application also propose a computer program product, including a computer program, which, when executed by a processor, implements the automatic spraying control method of the wet electrostatic precipitator as shown in the above embodiments.
[0077] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0078] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0079] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.
[0080] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.
Claims
1. A spray automatic control method for a wet electrostatic precipitator, characterized in that: include: Determine the current spraying cycle of the wet electrostatic precipitator according to the current dust concentration accumulation at the inlet of the wet electrostatic precipitator and the current impedance between the anode tube bundle and the cathode line of the wet electrostatic precipitator, wherein the current spraying cycle refers to the total time from the start time of the current spraying to the start time of the next spraying; Acquiring spray drainage turbidity monitoring data on the drainage pipeline of the wet electrostatic precipitator; Query the spray drainage turbidity monitoring data to determine the initial spray drainage turbidity corresponding to the current spray, the last initial spray drainage turbidity corresponding to the last spray, and the last final spray drainage turbidity corresponding to the last spray; Obtain the last spraying duration corresponding to the last spraying of the wet electrostatic precipitator; Obtaining a preset sprinkler drainage turbidity threshold and a preset time base; According to the last spraying time, the initial spraying drainage turbidity, the last initial spraying drainage turbidity, the last final spraying drainage turbidity, the spraying drainage turbidity threshold and the time base, the current spraying time of the wet electrostatic precipitator is obtained, wherein the current spraying time refers to the total time from the start time of the current spraying to the end time of the current spraying, and the specific formula is: Among them, t is the duration of this spraying, The duration of the last spray. is the initial spray drainage turbidity corresponding to the initial stage of this spray, is the turbidity of the last initial spray drainage corresponding to the initial stage of the last spray, It is the turbidity of the last spray drainage at the end of the last spraying stage. is the turbidity threshold of spray drainage, and is the time base; According to the current spraying cycle and the current spraying duration, the spray water pump of the wet electrostatic precipitator is controlled to perform spray dust removal, wherein the spray frequency of the spray water pump changes according to a preset spray frequency curve.
2. The method according to claim 1, characterized in that The method of determining the current spraying cycle of the wet electrostatic precipitator according to the current dust concentration accumulation at the inlet of the wet electrostatic precipitator and the current impedance between the anode tube bundle and the cathode line of the wet electrostatic precipitator comprises: Determine a spray cycle reference value corresponding to the wet electrostatic precipitator, a first normalized value corresponding to the cumulative amount of the current dust concentration, and a second normalized value corresponding to the current impedance; Determining a first weighting coefficient corresponding to the first normalized value and a second weighting coefficient corresponding to the second normalized value; The current spraying cycle is determined according to the spraying cycle reference value, the first normalized value, the second normalized value, the first weighting coefficient, and the second weighting coefficient.
3. The method according to claim 2, characterized in that The method for obtaining the first normalized value corresponding to the cumulative amount of the current dust concentration includes: After the last spraying is completed, the dust concentration at the inlet of the wet electrostatic precipitator is sampled again, and the sampling period, sampling times and real-time dust concentration value obtained at each sampling of the dust concentration at the inlet of the wet electrostatic precipitator are obtained; Obtaining the historical average dust concentration value at the inlet of the wet electrostatic precipitator and the last spraying cycle corresponding to the last spraying; According to the real-time dust concentration value, the sampling cycle, the number of sampling times, the historical average dust concentration value and the last spraying cycle, a first normalized value corresponding to the cumulative amount of the current dust concentration is obtained.
4. The method according to claim 2, characterized in that: The method for obtaining the second normalized value corresponding to the current impedance includes: Obtaining a secondary voltage and a secondary current of a high-voltage power supply corresponding to the wet electrostatic precipitator; Obtaining a reference impedance between the anode tube bundle and the cathode line when the wet electrostatic precipitator is in a no-load state; A second normalized value corresponding to the current impedance is acquired according to the secondary voltage, the secondary current and the reference impedance.
5. The method according to claim 1, characterized in that The spray frequency curve adopts a sawtooth wave curve.
6. A spray automatic control device for a wet electrostatic precipitator, characterized in that: include: A first acquisition module is used to determine the current spraying cycle of the wet electrostatic precipitator according to the current dust concentration accumulation at the inlet of the wet electrostatic precipitator and the current impedance between the anode tube bundle and the cathode line of the wet electrostatic precipitator, wherein the current spraying cycle refers to the total time from the start time of the current spraying to the start time of the next spraying; The second acquisition module is used to obtain the spray drainage turbidity monitoring data on the drainage pipeline of the wet electrostatic precipitator; query the spray drainage turbidity monitoring data to determine the initial spray drainage turbidity corresponding to this spray, the last initial spray drainage turbidity corresponding to the last spray, and the last end spray drainage turbidity corresponding to the last spray; obtain the last spraying time corresponding to the last spraying of the wet electrostatic precipitator; obtain the preset spray drainage turbidity threshold and the preset time base; according to the last spraying time, the initial spray drainage turbidity of this time, the last initial spray drainage turbidity, the last end spray drainage turbidity, the spray drainage turbidity threshold and the time base, obtain the current spraying time of the wet electrostatic precipitator, wherein the current spraying time refers to the total time from the start time of this spraying to the end time of this spraying, and the specific formula is: Among them, t is the duration of this spraying, The duration of the last spray. is the initial spray drainage turbidity corresponding to the initial stage of this spray, is the turbidity of the last initial spray drainage corresponding to the initial stage of the last spray, It is the turbidity of the last spray drainage at the end of the last spraying stage. is the turbidity threshold of spray drainage, and is the time base; The spray control module is used to control the spray water pump of the wet electrostatic precipitator to spray dust removal according to the current spray cycle and the current spray duration, wherein the spray frequency of the spray water pump changes according to a preset spray frequency curve.
7. An electronic device comprising: at least one processor; as well as, a memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the method according to any one of claims 1 to 5.
8. A non-transitory computer-readable storage medium storing computer instructions, wherein: The computer instructions are used to cause the computer to execute the method according to any one of claims 1-5.
9. A computer program product, comprising a computer program, which, when executed by a processor, implements the method according to any one of claims 1 to 5.
Citation Information
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