A method and system for hopper temperature control of an electrostatic precipitator

Abstract

The application provides a method and system for controlling the temperature of an ash bucket of an electric dust collector. The method comprises: obtaining an operating parameter of a flue of the electric dust collector; calculating a dew point temperature at a position of an ash bucket according to the operating parameter, wherein the ash bucket is located in the flue; and controlling the temperature of the ash bucket according to the dew point temperature at the position of the ash bucket. By the method provided by the application, the dew point temperature at the position of the ash bucket can be calculated in combination with the operating parameter of the flue, and the heating device is controlled according to the dew point temperature, so that the temperature of the ash bucket is adjusted in real time and dynamically, and the risk of dust condensation on the ash bucket wall is reduced.

Description

Technical Field

[0001] This application relates to the field of flue gas treatment, and in particular to a method and system for controlling the temperature of the ash hopper of an electrostatic precipitator. Background Technology

[0002] In an electrostatic precipitator, when the temperature of the ash hopper inside the flue is too low, condensation will form on the ash hopper wall inside the electrostatic precipitator, causing dust to clump together and leading to clogging of the ash hopper.

[0003] Currently, the method for regulating the temperature of the ash hopper using electric heating involves manually setting a target temperature. The ash hopper's built-in heating device is then energized, and proportional-integral-differential (PID) control is used to regulate the hopper's temperature based on feedback from temperature measuring points, maintaining the ash hopper temperature near the target. However, because the target temperature is fixed, it cannot be dynamically adjusted in real time. This can easily lead to situations where the heating device remains on for extended periods or the target temperature is too low, causing damage to the heating device or dust condensation. Summary of the Invention

[0004] In view of this, this application provides a method and system for controlling the temperature of the ash hopper of an electrostatic precipitator, with the aim of achieving real-time and dynamic adjustment of the ash hopper temperature.

[0005] A first aspect of this application provides a method for controlling the temperature of the ash hopper in an electrostatic precipitator, the method comprising:

[0006] Obtain the operating parameters of the flue gas duct of the electrostatic precipitator;

[0007] The dew point temperature at the location of the ash hopper is calculated based on the operating parameters, wherein the ash hopper is located inside the flue.

[0008] The temperature of the ash hopper is controlled according to the dew point temperature at the location of the ash hopper.

[0009] Optionally, calculating the dew point temperature at the location of the ash hopper based on the operating parameters includes:

[0010] The flue gas temperature attenuation coefficient is determined based on the operating parameters and the flue gas temperature attenuation coefficient formula of the flue. The operating parameters include the inlet temperature of the flue, the outlet temperature of the flue, the position information of the ash hopper, and the relative distance between the ash hopper and the flue inlet.

[0011] A first relationship array is constructed based on the location information of the ash hopper and the relative distance between the ash hopper and the flue inlet;

[0012] Substituting the first relation array and the flue gas temperature attenuation coefficient into the flue gas temperature attenuation coefficient formula, the flue gas temperature at the location of the ash hopper is obtained;

[0013] Substitute the flue gas temperature at the location of the ash hopper into the dew point temperature calculation formula to obtain the dew point temperature at the location of the ash hopper.

[0014] Optionally, the method further includes:

[0015] If a second relation array does not exist, the temperature of the ash hopper is controlled according to the dew point temperature.

[0016] Optionally, the method further includes:

[0017] A second relation array is constructed based on the inlet temperature of the flue, the dew point temperature at the location of the ash hopper, and the first relation array.

[0018] Optionally, after obtaining the operating parameters of the electrostatic precipitator's flue, the method further includes:

[0019] The temperature of the ash hopper is controlled according to the dew point temperature at the location of the ash hopper in the second relation array;

[0020] Optionally, controlling the temperature of the ash hopper based on the dew point temperature at the location of the ash hopper in the second relation array includes:

[0021] If the inlet temperature of the flue changes, and the change in inlet temperature is greater than the preset temperature value, the dew point temperature is recalculated to obtain the recalculated dew point temperature.

[0022] The temperature of the ash hopper is controlled based on the recalculated dew point temperature.

[0023] Optionally, controlling the temperature of the ash hopper based on the dew point temperature at the location of the ash hopper in the second relation array includes:

[0024] If the inlet temperature of the flue changes, and the change in inlet temperature is less than or equal to a preset temperature threshold, the temperature of the ash hopper is controlled according to the dew point temperature at the location of the ash hopper in the second relation array.

[0025] Optionally, controlling the temperature of the ash hopper based on the dew point temperature at the location of the ash hopper includes:

[0026] The ash hopper is heated to a target temperature by a heating device, wherein the target temperature is the sum of the dew point temperature at the location of the ash hopper and a preset dew point temperature deviation threshold.

[0027] Optionally, the method further includes:

[0028] Obtain the heating duration of the heating device;

[0029] If the heating time exceeds a preset time threshold, and the temperature of the ash hopper is less than or equal to the dew point temperature at the location of the ash hopper, then the control system of the electrostatic precipitator will be notified of an abnormality in the heating device.

[0030] A second aspect of this application provides a temperature control system for the ash hopper of an electrostatic precipitator, the system comprising: a communication module, a computing module, and a control module;

[0031] The communication module is used to acquire the operating parameters of the flue of the electrostatic precipitator;

[0032] The calculation module is used to calculate the dew point temperature at the location of the ash hopper based on the operating parameters, wherein the ash hopper is located inside the flue.

[0033] The control module is used to control the temperature of the ash hopper based on the dew point temperature at the location of the ash hopper.

[0034] Optionally, the calculation module is used to determine the flue gas temperature attenuation coefficient based on the operating parameters and the flue gas temperature attenuation coefficient formula, wherein the operating parameters include the inlet temperature of the flue, the outlet temperature of the flue, the position information of the ash hopper, and the relative distance between the ash hopper and the flue inlet;

[0035] The calculation module is used to construct a first relationship array based on the location information of the ash hopper and the relative distance between the ash hopper and the flue inlet;

[0036] The calculation module is used to substitute the first relation array and the flue gas temperature attenuation coefficient into the flue gas temperature attenuation coefficient formula to obtain the flue gas temperature at the location of the ash hopper.

[0037] The calculation module is used to substitute the flue gas temperature at the location of the ash hopper into the dew point temperature calculation formula to obtain the dew point temperature at the location of the ash hopper.

[0038] Optionally, if a second relation array does not exist, the control module is used to control the temperature of the ash hopper based on the dew point temperature.

[0039] Optionally, the calculation module is further configured to construct a second relation array based on the inlet temperature of the flue, the dew point temperature at the location of the ash hopper, and the first relation array.

[0040] Optionally, if the second relation array exists, the control module is used to control the temperature of the ash hopper according to the dew point temperature of the location of the ash hopper in the second relation array;

[0041] If the second relation array does not exist, the dew point temperature at the location of the ash hopper in the flue is calculated based on the operating parameters.

[0042] Optionally, if the inlet temperature of the flue changes, and the change in inlet temperature is greater than a preset temperature value, the calculation module is used to recalculate the dew point temperature to obtain the recalculated dew point temperature.

[0043] The control module is used to control the temperature of the ash hopper based on the recalculated dew point temperature.

[0044] Optionally, if the inlet temperature of the flue changes, and the change in inlet temperature is less than or equal to a preset temperature threshold, the control module is used to control the temperature of the ash hopper according to the dew point temperature at the location of the ash hopper in the second relation array.

[0045] Optionally, the control module is used to heat the ash hopper to a target temperature using a heating device, wherein the target temperature is the sum of the dew point temperature at the location of the ash hopper and a preset dew point temperature deviation threshold.

[0046] Optionally, the control module is used to obtain the heating time of the heating device;

[0047] When the heating time exceeds a preset time threshold, if the temperature of the ash hopper is less than or equal to the dew point temperature at the location of the ash hopper, the communication module is used to feed back information about the abnormality of the heating device to the control system of the electrostatic precipitator.

[0048] This application provides a method and system for controlling the temperature of the ash hopper in an electrostatic precipitator. The method includes: acquiring the operating parameters of the flue of the electrostatic precipitator; calculating the dew point temperature at the location of the ash hopper based on the operating parameters, wherein the ash hopper is located within the flue; and controlling the temperature of the ash hopper based on the dew point temperature at its location. The method provided in this application allows for the calculation of the dew point temperature at the location of the ash hopper by combining the operating parameters of the flue, and the control of the heating device based on the dew point temperature, thereby achieving real-time and dynamic adjustment of the ash hopper temperature and reducing the risk of dust condensation on the ash hopper wall. Attached Figure Description

[0049] Figure 1 A schematic flowchart illustrating a method for controlling the temperature of the ash hopper in an electrostatic precipitator, provided in an embodiment of this application;

[0050] Figure 2 A schematic flowchart illustrating another method for controlling the ash hopper temperature of an electrostatic precipitator provided in an embodiment of this application;

[0051] Figure 3 This is a schematic diagram of the structure of a dust hopper temperature control system for an electrostatic precipitator provided in an embodiment of this application. Detailed Implementation

[0052] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0053] The following is combined with Figure 1 This application introduces a method for controlling the temperature of the ash hopper of an electrostatic precipitator, which can be achieved through steps S101-S103.

[0054] S101: Obtain the operating parameters of the flue gas duct of the electrostatic precipitator.

[0055] Specifically, it can interact with the power plant's distributed control system (DSC) to obtain real-time operating parameters of the flue inside the electrostatic precipitator.

[0056] Specifically, the operating parameters of the flue include the flue inlet temperature, the flue outlet temperature, the location information of the ash hopper, the relative distance between the ash hopper and the flue inlet, the dust concentration at the inlet of the electrostatic precipitator, the cross-sectional area of ​​the flue, the pressure difference between the flue gas at the inlet and outlet, and the relative humidity of the flue gas.

[0057] S102: Calculate the dew point temperature at the location of the ash hopper based on the operating parameters.

[0058] Specifically, based on the operating parameters of the flue, the flue gas temperature attenuation formula is substituted into the solution to obtain the flue gas temperature attenuation coefficient.

[0059] Specifically, the flue gas temperature at the location of the ash hopper is obtained based on the flue gas temperature decay formula, the flue gas temperature decay coefficient, and the relative distance between the ash hopper and the flue inlet. The dew point temperature at the location of the ash hopper is then calculated using the dew point temperature calculation formula.

[0060] S103: Control the temperature of the ash hopper based on the dew point temperature at the location of the ash hopper.

[0061] Specifically, the dew point temperature at the location of the ash hopper is used as the basis for temperature control of the ash hopper. The heating device built into the ash hopper is closed or opened to control the temperature of the ash hopper.

[0062] The method for controlling the ash hopper temperature of an electrostatic precipitator provided in this application embodiment can calculate the dew point temperature at the location of the ash hopper by combining the operating parameters of the flue, and control the heating device based on the dew point temperature, thereby realizing real-time and dynamic adjustment of the ash hopper temperature and reducing the risk of dust condensation on the ash hopper wall.

[0063] The following is combined with Figure 2 This application introduces another method for controlling the ash hopper temperature of an electrostatic precipitator, which can be implemented through steps S201-S213.

[0064] The embodiments of this application are applied to, for example, Figure 3 The diagram shows a temperature control system for the ash hopper of an electrostatic precipitator. The system includes a communication module 301, a calculation module 302, and a control module 303.

[0065] S201: Obtain the operating parameters of the electrostatic precipitator.

[0066] Specifically, the communication module interacts with the power plant's DCS to obtain the operating parameters of the electrostatic precipitator, so that the temperature of the ash hopper of the electrostatic precipitator can be accurately adjusted according to the operating parameters.

[0067] Specifically, the obtained operating parameters of the electrostatic precipitator include the inlet temperature of the flue, the outlet temperature of the flue, the location information of the ash hopper, the relative distance between the ash hopper and the flue inlet, the dust concentration at the inlet of the electrostatic precipitator, the cross-sectional area of ​​the flue, the pressure difference between the flue gas at the inlet and outlet of the flue, and the relative humidity of the flue gas.

[0068] Specifically, the communication protocol used when the communication module communicates with the DCS is MODBUS TCP / RTU.

[0069] S202: Determine if the second relation array exists.

[0070] Specifically, determine whether the second relation array exists.

[0071] If a second relation array does not exist, proceed to step S203.

[0072] If a second relation array exists, proceed to step S213.

[0073] S203: Calculate the flue gas temperature attenuation coefficient.

[0074] Specifically, the flue gas temperature attenuation coefficient is calculated using the calculation module.

[0075] The formula for calculating the flue gas temperature attenuation coefficient in a flue is shown below:

[0076]

[0077] Where λ is the flue gas temperature attenuation coefficient inside the flue, ΔT is the temperature difference between the flue gas inlet and outlet, and T e T represents the flue gas temperature at the flue gas inlet. o denoted as F, where P is the flue gas temperature at the flue outlet, RH is the relative humidity of the flue gas, D is the dust concentration at the inlet of the electrostatic precipitator, S is the cross-sectional area of ​​the flue, and L is the relative distance from the flue inlet.

[0078] By substituting the real-time operating parameters of the electrostatic precipitator obtained in step S201 into the flue gas temperature attenuation coefficient formula, the flue gas temperature attenuation coefficient in the flue is obtained.

[0079] S204: Construct the first relation array.

[0080] Specifically, a first relational array is constructed based on the location information of the ash hopper and the relative distance between the ash hopper and the flue inlet.

[0081] Specifically, the calculation module performs array mapping and arrangement of the ash hoppers in each flue of the electrostatic precipitator according to their actual positions, measures and marks the actual distance between each ash hopper and the flue inlet, establishes the mapping relationship, and obtains the first relationship array.

[0082] The first relation array is shown below:

[0083]

[0084] Where n is an integer greater than or equal to 1, A n L is an array representing the location information of the ash hopper. n An array representing the relative distance between the ash hopper and the flue inlet.

[0085] S205: Calculate the flue gas temperature at the location of the ash hopper.

[0086] Specifically, by substituting the first relational array and the flue gas temperature attenuation coefficient into the flue gas temperature attenuation coefficient formula, the flue gas temperature at the location of the ash hopper can be obtained.

[0087] Specifically, the formula for the flue gas temperature attenuation coefficient is transformed as follows:

[0088]

[0089] Where T0 is the flue gas temperature at the location of the ash hopper, λ is the flue gas temperature attenuation coefficient in the flue, D is the dust concentration at the inlet of the electrostatic precipitator, S is the cross-sectional area of ​​the flue, L is the relative distance from the flue inlet, P is the gas pressure difference between the flue gas at the inlet and outlet of the flue, and RH is the relative humidity of the flue gas.

[0090] L nSubstituting L into the formula for the temperature decay coefficient of the converted flue gas, we can obtain the flue gas temperature at each ash hopper location.

[0091] S206: Calculate the dew point temperature at the location of the ash hopper.

[0092] Specifically, the dew point temperature at the location of the ash hopper is substituted into the dew point temperature calculation formula to obtain the dew point temperature at the location of the ash hopper.

[0093] The formula for calculating dew point temperature is as follows:

[0094] T d =T-((100-RH) / 5);

[0095] Among them, T d Here, T is the dew point temperature, T is the flue gas temperature, and RH is the flue gas relative humidity.

[0096] S207: Construct the second relation array.

[0097] Specifically, a second relation array is constructed based on the inlet temperature of the flue, the dew point temperature at the location of the ash hopper, and the first relation array.

[0098] Specifically, the inlet temperature of each flue and the dew point temperature at the location of the ash hopper are mapped to the first relation array to obtain the second relation array. The second relation array is shown below:

[0099]

[0100] Where n is an integer greater than or equal to 1, A n L is an array representing the location information of the ash hopper. n T is an array representing the relative distance between the ash hopper and the flue inlet. en T is an array representing the flue gas temperature at the flue gas inlet. dn This is an array representing the dew point temperature at the location of each ash hopper.

[0101] S208: Control the temperature of the ash hopper based on the dew point temperature.

[0102] Specifically, the temperature of the ash hopper is regulated based on the dew point temperature of the ash hopper location in the second relation array. The control module heats the ash hopper to the target temperature through a heating device. The target temperature is the sum of the dew point temperature of the ash hopper location and the preset dew point temperature deviation value.

[0103] If the temperature of the ash hopper is greater than or equal to the target temperature at this time, proceed to step S209.

[0104] If the temperature of the ash hopper is lower than the target temperature at this time, proceed to step S210.

[0105] It is understandable that the preset dew point temperature deviation value can be adjusted according to actual needs in practical applications, and this application does not limit this.

[0106] S209: Control the heating device to disconnect.

[0107] Specifically, the control module disconnects the heating device built into the ash hopper. Since the temperature of the ash hopper at this time is greater than or equal to the sum of the dew point temperature at the location of the ash hopper and the preset dew point temperature deviation, condensation on the ash hopper wall is prevented from causing dust agglomeration.

[0108] S210: Controls the closing of the heating device.

[0109] Specifically, the control module closes the heating device built into the ash hopper, thereby controlling the temperature of the ash hopper through the heating device.

[0110] Specifically, through steps S209-S210, the closing or opening of the heating device is controlled based on the dew point temperature obtained by dynamic calculation, thus avoiding power waste or condensation.

[0111] S211: Does the heating time exceed the preset time threshold?

[0112] Specifically, the heating duration of the heating device is obtained by monitoring the closing time of the heating device through the control module.

[0113] If the heating time does not exceed the preset time point, return to step S210.

[0114] If the heating time exceeds the preset time point, and the temperature of the ash hopper is less than or equal to the dew point temperature at the location of the ash hopper, then proceed to step S212.

[0115] It is understandable that the preset time point can be adjusted according to actual needs in practical applications, and this application does not limit this.

[0116] S212: Warning of abnormal heating.

[0117] Specifically, the communication module sends a warning message about heating device malfunctions to the electrostatic precipitator's control system. This step enables real-time dynamic identification of whether the ash hopper is heating abnormally.

[0118] S213: Determine the flue gas temperature at the flue inlet.

[0119] If the inlet temperature of the flue changes, and the change in inlet temperature is greater than the preset temperature threshold, then proceed to step S205.

[0120] If the inlet temperature of the flue changes, and the change in inlet temperature is less than or equal to the preset temperature threshold, then proceed to step S208.

[0121] It is understandable that the change in inlet temperature can be adjusted according to actual needs in practical applications, and this application does not limit this.

[0122] When the inlet temperature of the flue changes, the new dew point temperature can be dynamically calculated, thereby adjusting the target temperature of the ash hopper heating device.

[0123] The ash hopper temperature control method for an electrostatic precipitator provided in this application can automatically calculate the dew point temperature at the location of the ash hopper by combining the operating parameters of the flue gas duct. Based on the dew point temperature, the heating device is controlled, thereby achieving real-time and dynamic adjustment of the ash hopper temperature and reducing the risk of dust condensation on the ash hopper wall. Temperature control can identify any abnormal heating faults in the ash hopper, improving the accuracy and timeliness of heating anomaly identification. When the flue gas temperature changes, the temperature control target can be adjusted promptly to avoid energy waste and the recurrence of condensation.

[0124] The following is combined with Figure 3 This application introduces a dust hopper temperature control system for an electrostatic precipitator, which includes a communication module 301, a calculation module 302, and a control module 303.

[0125] In this embodiment, the communication module 301, the computing module 302, and the control module 303 communicate using the HTTP protocol.

[0126] The communication module 301 is used to acquire the operating parameters of the flue gas duct of the electrostatic precipitator.

[0127] The calculation module 302 is used to calculate the dew point temperature at the location of the ash hopper based on the operating parameters, wherein the ash hopper is located inside the flue.

[0128] The control module 303 is used to control the temperature of the ash hopper based on the dew point temperature at the location of the ash hopper.

[0129] Specifically, the calculation module 302 is used to determine the flue gas temperature attenuation coefficient based on the operating parameters and the flue gas temperature attenuation coefficient formula. The operating parameters include the flue gas inlet temperature, the flue gas outlet temperature, the ash hopper location information, and the relative distance between the ash hopper and the flue gas inlet.

[0130] The calculation module 302 is used to construct a first relation array based on the location information of the ash hopper and the relative distance between the ash hopper and the flue inlet.

[0131] The calculation module 302 is used to substitute the first relation array and the flue gas temperature attenuation coefficient into the flue gas temperature attenuation coefficient formula to obtain the flue gas temperature at the location of the ash hopper.

[0132] The calculation module 302 is used to substitute the flue gas temperature at the location of the ash hopper into the dew point temperature calculation formula to obtain the dew point temperature at the location of the ash hopper.

[0133] Specifically, if the second relation array does not exist, the control module 303 is used to control the temperature of the ash hopper based on the dew point temperature.

[0134] Specifically, the calculation module 302 is also used to construct a second relation array based on the inlet temperature of the flue, the dew point temperature at the location of the ash hopper, and the first relation array.

[0135] Specifically, if a second relation array exists, the control module 303 is used to control the temperature of the ash hopper based on the dew point temperature of the ash hopper location in the second relation array.

[0136] If a second relation array does not exist, the dew point temperature at the location of the ash hopper in the flue is calculated based on the operating parameters.

[0137] Specifically, if the inlet temperature of the flue changes and the change is greater than the preset temperature value, the calculation module 302 is used to recalculate the dew point temperature to obtain the recalculated dew point temperature.

[0138] The control module 303 is used to control the temperature of the ash hopper based on the recalculated dew point temperature.

[0139] Specifically, if the inlet temperature of the flue changes, and the change in inlet temperature is less than or equal to a preset temperature threshold, the control module 303 is used to control the temperature of the ash hopper based on the dew point temperature at the location of the ash hopper in the second relation array.

[0140] Specifically, the control module 303 is used to heat the ash hopper to a target temperature through a heating device, wherein the target temperature is the sum of the dew point temperature at the location of the ash hopper and a preset dew point temperature deviation threshold.

[0141] Specifically, the control module 303 is used to obtain the heating time of the heating device.

[0142] When the heating time exceeds the preset time threshold, if the temperature of the ash hopper is less than or equal to the dew point temperature at the location of the ash hopper, the communication module 301 is used to feed back information about the abnormality of the heating device to the control system of the electrostatic precipitator.

[0143] The ash hopper temperature control system of the electrostatic precipitator provided in this application embodiment can calculate the dew point temperature at the location of the ash hopper by combining the operating parameters of the flue, and control the heating device based on the dew point temperature, thereby realizing real-time and dynamic adjustment of the ash hopper temperature and reducing the risk of dust condensation on the ash hopper wall.

[0144] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments described herein can be implemented in a sequence other than that illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0145] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0146] In the embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical business division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, indirect coupling or communication connection between apparatuses or units, and may be electrical, mechanical, or other forms.

[0147] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0148] Furthermore, the various business units in the embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software business unit.

[0149] If the integrated unit is implemented as a software business unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0150] Those skilled in the art will recognize that, in one or more of the examples above, the services described in this invention can be implemented using hardware, software, firmware, or any combination thereof. When implemented in software, these services can be stored in a computer-readable medium or transmitted as one or more instructions or code on a computer-readable medium. Computer-readable media include computer storage media and communication media, wherein communication media include any medium that facilitates the transmission of computer programs from one place to another. Storage media can be any available medium accessible to general-purpose or special-purpose computers.

[0151] The above specific embodiments further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above are merely specific embodiments of the present invention.

[0152] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A method for controlling the temperature of the ash hopper in an electrostatic precipitator, characterized in that, The method includes: Obtain the operating parameters of the flue gas duct of the electrostatic precipitator; The dew point temperature at the location of the ash hopper is calculated based on the operating parameters, wherein the ash hopper is located inside the flue. The temperature of the ash hopper is controlled according to the dew point temperature at the location of the ash hopper; The calculation of the dew point temperature at the location of the ash hopper based on the operating parameters includes: The flue gas temperature attenuation coefficient is determined based on the operating parameters and the flue gas temperature attenuation coefficient formula. The operating parameters include the inlet temperature of the flue, the outlet temperature of the flue, the location information of the ash hopper, the relative distance between the ash hopper and the flue inlet, the dust concentration at the inlet of the electrostatic precipitator, the cross-sectional area of ​​the flue, the gas pressure difference between the flue gas at the inlet and outlet of the flue, and the relative humidity of the flue gas. A first relationship array is constructed based on the location information of the ash hopper and the relative distance between the ash hopper and the flue inlet; Substituting the first relation array and the flue gas temperature attenuation coefficient into the flue gas temperature attenuation coefficient formula, the flue gas temperature at the location of the ash hopper is obtained; Substitute the flue gas temperature at the location of the ash hopper into the dew point temperature calculation formula to obtain the dew point temperature at the location of the ash hopper. The formula for the flue gas temperature attenuation coefficient is as follows: ； This is the coefficient for temperature attenuation of flue gas inside the flue. For the temperature difference between the flue gas inlet and outlet, The inlet temperature of the flue. The outlet temperature of the flue. The pressure difference between the flue gas at the inlet and outlet of the flue. The relative humidity of the flue gas. The dust concentration at the inlet of the electrostatic precipitator. Let be the cross-sectional area of ​​the flue. This represents the relative distance between the flue outlet and the flue inlet. The formula for the flue gas temperature attenuation coefficient is transformed into: ； in, This refers to the flue gas temperature at the location of the ash hopper. This is the relative distance between the ash hopper and the flue inlet; The formula for calculating the dew point temperature is: ； This is the dew point temperature.

2. The method according to claim 1, characterized in that, The method further includes: A second relation array is constructed based on the inlet temperature of the flue, the dew point temperature at the location of the ash hopper, and the first relation array; The second relation array is: ； n is an integer greater than or equal to 1. An array representing the location information of the ash hopper. An array representing the relative distance between the ash hopper and the flue inlet. An array representing the temperature of the flue gas at the flue inlet. This is an array representing the dew point temperature at the location of each ash hopper.

3. The method according to claim 2, characterized in that, The method further includes: If a second relation array does not exist, the temperature of the ash hopper is controlled according to the dew point temperature.

4. The method according to claim 3, characterized in that, After obtaining the operating parameters of the flue gas duct of the electrostatic precipitator, the method further includes: The temperature of the ash hopper is controlled based on the dew point temperature at the location of the ash hopper in the second relation array.

5. The method according to claim 4, characterized in that, The step of controlling the temperature of the ash hopper based on the dew point temperature at the location of the ash hopper in the second relation array includes: If the inlet temperature of the flue changes, and the change in inlet temperature is greater than a preset temperature threshold, the dew point temperature is recalculated to obtain the recalculated dew point temperature. The temperature of the ash hopper is controlled based on the recalculated dew point temperature.

6. The method according to claim 5, characterized in that, The step of controlling the temperature of the ash hopper based on the dew point temperature at the location of the ash hopper in the second relation array includes: If the inlet temperature of the flue changes, and the change in inlet temperature is less than or equal to a preset temperature value, then the temperature of the ash hopper is controlled according to the dew point temperature at the location of the ash hopper in the second relation array.

7. The method according to claim 1, characterized in that, The step of controlling the temperature of the ash hopper based on the dew point temperature at the location of the ash hopper includes: The ash hopper is heated to a target temperature by a heating device, wherein the target temperature is the sum of the dew point temperature at the location of the ash hopper and a preset dew point temperature deviation threshold.

8. The method according to claim 7, characterized in that, The method further includes: Obtain the heating duration of the heating device; If the heating time exceeds a preset time threshold, and the temperature of the ash hopper is less than or equal to the dew point temperature at the location of the ash hopper, then the control system of the electrostatic precipitator will be notified of an abnormality in the heating device.

9. A temperature control system for the ash hopper of an electrostatic precipitator, characterized in that, The system includes: a communication module, a computing module, and a control module; The communication module is used to acquire the operating parameters of the flue of the electrostatic precipitator; The calculation module is used to calculate the dew point temperature at the location of the ash hopper based on the operating parameters, wherein the ash hopper is located inside the flue. The control module is used to control the temperature of the ash hopper based on the dew point temperature at the location of the ash hopper. The computing module is specifically used for: The flue gas temperature attenuation coefficient is determined based on the operating parameters and the flue gas temperature attenuation coefficient formula. The operating parameters include the inlet temperature of the flue, the outlet temperature of the flue, the location information of the ash hopper, the relative distance between the ash hopper and the flue inlet, the dust concentration at the inlet of the electrostatic precipitator, the cross-sectional area of ​​the flue, the gas pressure difference between the flue gas at the inlet and outlet of the flue, and the relative humidity of the flue gas. A first relationship array is constructed based on the location information of the ash hopper and the relative distance between the ash hopper and the flue inlet; Substituting the first relation array and the flue gas temperature attenuation coefficient into the flue gas temperature attenuation coefficient formula, the flue gas temperature at the location of the ash hopper is obtained; Substitute the flue gas temperature at the location of the ash hopper into the dew point temperature calculation formula to obtain the dew point temperature at the location of the ash hopper. The formula for the flue gas temperature attenuation coefficient is as follows: ； This is the coefficient for temperature attenuation of flue gas inside the flue. For the temperature difference between the flue gas inlet and outlet, The inlet temperature of the flue. The outlet temperature of the flue. The pressure difference between the flue gas at the inlet and outlet of the flue. The relative humidity of the flue gas. The dust concentration at the inlet of the electrostatic precipitator. Let be the cross-sectional area of ​​the flue. This represents the relative distance between the flue outlet and the flue inlet. The formula for the flue gas temperature attenuation coefficient is transformed into: ； in, This refers to the flue gas temperature at the location of the ash hopper. This is the relative distance between the ash hopper and the flue inlet; The formula for calculating the dew point temperature is: ； This is the dew point temperature.

Images