CN214811729U - Expert control system for electrostatic dust collection - Google Patents
Expert control system for electrostatic dust collection Download PDFInfo
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- CN214811729U CN214811729U CN201921051685.7U CN201921051685U CN214811729U CN 214811729 U CN214811729 U CN 214811729U CN 201921051685 U CN201921051685 U CN 201921051685U CN 214811729 U CN214811729 U CN 214811729U
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Abstract
The utility model relates to an automatic control field, its embodiment provides an electrostatic precipitator expert control system, include: the device comprises a channel working condition detection module, a data acquisition card, a data processing module, a data communication module, a power supply control module and an ash removal control module; the channel working condition detection module is connected with the data processing module through the data acquisition card; the data processing module is also connected with the power supply control module and the ash removal control module through the data communication module; the data processing module is used for receiving the signal of the channel working condition detection module and the signal of the data communication module and sending control signals to the power supply control module and the ash removal control module. The utility model discloses an embodiment provides a degree of automation height, energy-conserving efficient dust removal control system.
Description
Technical Field
The utility model relates to an automatic control field, in particular to electrostatic precipitator expert control system.
Background
The electrostatic dust collector has the advantages of high dust collection efficiency, low operation and maintenance cost and the like, is widely used in dust treatment and material recovery occasions of thermal coal-fired power plants, metallurgy, chemical industry, building materials and other industries, and is industrial dust collection equipment widely applied at present. The power technology of the electrostatic dust collector is continuously improved, and the dust collection efficiency of the electrostatic dust collector is continuously improved from an early power frequency single-phase power supply, a power frequency three-phase power supply and a constant current source to the existing high-frequency power supply and pulse power supply; electrostatic precipitators can be divided into dry precipitators and wet precipitators, and the two types are mainly distinguished by differences in the manner of dust collection.
The main working processes of the electrostatic dust collector comprise a dust charging process and a dust collecting process. When the flue gas passes through the high-voltage electric field, the dust in the flue gas is charged, and most of the charged dust is adsorbed on the dust collection polar plate under the action of the electric field force; the dust collecting part is also provided with a rapping device (comprising a mechanical cleaning device) or a spraying device, and the collecting device periodically raps (cleans) or sprays the polar plate to collect dust with certain thickness adsorbed on the polar plate.
The ideal working condition of the electrostatic dust collector is that the dust collection efficiency can be kept high under various working conditions, the requirements of different industries are met, and the charge process and the collection process of dust are required to be in the optimal state; these all rely on a sophisticated hardware architecture. The hardware architecture of the existing electrostatic dust removal control system has certain defects.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention is directed to an expert control system for electrostatic precipitator, which at least solves the above problems.
In order to achieve the above object, the utility model provides an electrostatic precipitation expert control system in a first aspect, include: the device comprises a channel working condition detection module, a data acquisition card, a data processing module, a data communication module, a power supply control module and an ash removal control module;
the channel working condition detection module is connected with the data processing module through the data acquisition card, and the data processing module is also connected with the power supply control module and the ash removal control module through the data communication module;
the channel working condition detection module is used for detecting the working condition in the channel and transmitting the acquired data to the data acquisition card;
the data processing module is used for receiving data transmitted from the data acquisition card and the data communication module and outputting control instructions to the power supply control module and the ash removal control module;
optionally, the channel working condition detection module comprises a unit load measuring meter, a temperature sensor, an air volume sensor and a dust concentration detection sensor.
Optionally, the data acquisition card is configured to transmit and process data acquired by the channel condition detection module, and provide basic data support for the data processing module; the data acquisition card is a high-speed data acquisition card.
Optionally, the power control module is configured to perform data exchange with an electric field power device of the electrostatic precipitator, where the data exchange includes: and reading operation parameters from the electric field power supply equipment, and sending a control instruction generated by the data processing module to the electric field power supply equipment for execution.
Optionally, the ash removal control module is configured to perform data exchange with an ash removal device of the electrostatic precipitator, where the data exchange includes: and reading the operation parameters from the ash cleaning equipment, and sending the control instruction generated by the data processing module to the ash cleaning equipment for execution.
Optionally, the data communication module is used for communication between the system and the outside, and includes communication with the power supply control module and the ash removal control module.
Optionally, the communication opposite end of the data communication module further includes at least one of a field distributed control system, a plant-level monitoring information system, a management information system, and a big data cloud platform.
Optionally, the system further includes a data storage module, and the data storage module is configured to store historical data and system logs of the system.
Optionally, the system further includes a protocol conversion module, where the protocol conversion module is disposed between the channel condition detection module and the data acquisition card, and is configured to provide protocol conversion and adaptation for the data of the channel condition detection module.
Optionally, the system further comprises a human-machine interface plug-in for providing an input device interface and a display interface, and for providing interaction between the system and a user.
Through the utility model provides an above-mentioned technical scheme provides an electrostatic precipitator expert control system's system architecture, can provide the hardware basis for realizing electrostatic precipitator's automatic operation.
Other features and advantages of the present invention will be described in detail in the detailed description which follows.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:
FIG. 1 is a schematic structural diagram of an expert control system for electrostatic precipitation according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a fuzzy control flow of an expert electrostatic precipitator control system according to an embodiment of the present invention.
Detailed Description
In the present invention, the embodiments and the features of the embodiments may be combined with each other without conflict.
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.
Fig. 1 is a schematic structural diagram of an expert control system for electrostatic precipitation according to an embodiment of the present invention. As shown in fig. 1, the device comprises a channel working condition detection module, a data acquisition card, a data processing module, a data communication module, a power supply control module and an ash removal control module;
the channel working condition detection module is connected with the data processing module through the data acquisition card, and the data processing module is also connected with the power supply control module and the ash removal control module through the data communication module;
the channel working condition detection module is used for detecting the working condition in the channel and transmitting the acquired data to the data acquisition card;
the data processing module is used for receiving data transmitted from the data acquisition card and the data communication module and outputting control instructions to the power supply control module and the ash removal control module;
therefore, the embodiment of the utility model provides an electrostatic precipitator expert control system provides the hardware basis for realizing electrostatic precipitator's automatic operation.
Specifically, the system mainly comprises a collecting device, a control device and a dust removal device. The utility model provides a pair of collection system among embodiment mainly is passageway operating mode detection module, and it has included multiple sensor, can gather the multiple state parameter in the passageway, provides input data for controlling means's decision-making. The control device is mainly a data processing module and can execute a fuzzy control strategy to control the dust removal device according to input collected data, and the control comprises the control of the switch and the operation intensity of the device. The dust removing device mainly comprises a power supply control module and the ash removal control module. The power supply control module is used for controlling a high-voltage electrostatic field in the dust removal device, dust-containing gas is electrically separated when passing through the high-voltage electrostatic field, and dust particles and negative ions are combined to be charged negatively and then tend to be discharged on the surface of an anode to be deposited. In the metallurgical, chemical and other industries to purify gases or recover useful dust particles. The ash removal control module is used for controlling ash removal equipment, and the ash removal equipment can be mechanical type, electromagnetic type or motor type rapping ash removal equipment and can also be wet-type dust removal water spraying ash removal equipment. The data acquisition card is used for automatically acquiring non-electric quantity or electric quantity signals from analog and digital tested units such as a sensor and other devices to be tested and sending the signals to the control device for analysis and processing.
The following describes each component in the system according to the embodiment of the present invention:
the channel working condition detection module comprises a unit load measuring meter, a temperature sensor, an air quantity sensor and a dust concentration detection sensor and is used for detecting the working condition in the channel and transmitting the working condition to the data acquisition card. The data required to be collected are set correspondingly to the type of the sensor, and the position of the sensor is also arranged according to the requirements of the actual scene. The detection module is not limited to the detection of the near end of the electric field of the dust remover, and also comprises the detection of the far end of the outlet of the electric field channel of the dust remover and the inlet and outlet working condition information of the multi-stage dust remover.
The data acquisition card is used for transmitting and processing the data acquired by the channel working condition detection module and providing basic data support for the data processing module; the data acquisition card is a high-speed data acquisition card. The data acquisition hardware is a high-speed data acquisition card, and the data processing part hardware can be special FPGA special hardware structure equipment or a hardware structure that software depends on an industrial control computer CPU. The data acquisition device is a measuring device which is combined with a computer or other special testing platform-based measuring software and hardware products to realize flexibility and user-definition. The data acquisition card, i.e. the computer expansion card for realizing the Data Acquisition (DAQ) function, can be accessed to the personal computer through the buses of USB, PXI, PCI Express, firewire (IEEE1394), PCMCIA, ISA, Compact Flash, 485, 232, Ethernet, various wireless networks, etc.
The power control module is mainly used for data interaction with an electric field power supply of the electrostatic dust collector, and comprises: and reading operation parameters from the electric field power supply equipment, and issuing an instruction generated by the data processing module to the electric field power supply equipment for execution. The power supply control module is used for controlling a high-voltage electrostatic field in the dust removal device, dust-containing gas is electrically separated when passing through the high-voltage electrostatic field, and dust particles and negative ions are combined to be charged negatively and then tend to be discharged on the surface of an anode to be deposited. The power supply control module can be a network communication hardware card and is used for reading the operation parameters of the high-voltage electrostatic field, controlling the on and off of the high-voltage electrostatic field and controlling the operation state of the high-voltage electrostatic field.
The deashing control module is mainly used for carrying out data exchange with the deashing equipment of electrostatic precipitator, includes: and reading the operating parameters from the ash cleaning equipment, and sending the instruction generated by the data processing module to the ash cleaning equipment for execution. The ash cleaning equipment can be mechanical, electromagnetic or motor type rapping ash cleaning equipment, and can also be wet type dust removal water spraying ash cleaning equipment. In a specific scene, the dust removing device can be a network communication hardware card or a multi-path IO output card according to different on-site dust removing devices. Besides the reading of the operation state of the ash cleaning device, the rapping frequency or the electric field intensity or the water spraying amount of the ash cleaning device is also controlled.
The data communication module is used for communicating the system with the outside, and communicates with the power supply control module and the ash removal control module. The data communication module is mainly used for communication, and can be a common RJ45, RS232, RS485 and other wired communication modules, and can also be a WIFI, Bluetooth, GPRS, 2G \3G \4G \5G and other wireless communication modules. The specific structure can be a network communication hardware card, and can also be a hardware structure of which software depends on an industrial computer CPU.
The communication opposite end of the data communication module further comprises at least one of a field distributed control system, a factory-level monitoring information system, a management information system and a big data cloud platform. The embodiment of the utility model provides a system can be an independent system, also can be the subsystem among the automatic system in the enterprise. For example, the data is transmitted to other systems such as a field Distributed Control System (DCS), a plant monitor information system (SIS), a Management Information System (MIS), a big data cloud platform, and the like, and becomes a part of the cooperative work thereof.
Optionally, the system further includes a data storage module, and the data storage module is configured to store historical data and system logs of the system.
The preferred means of data storage here is a storage server, which is connected to the data communication module. When the data storage in the embodiment is a separate storage device, such as an SD card or a hard disk, it may be directly connected to the data processing module. The function of the stored data is mainly to provide a data base for big data analysis and historical data learning and to improve the intelligent degree of the electrostatic dust removal expert control system.
Optionally, the system further includes a protocol conversion module, where the protocol conversion module is disposed between the channel condition detection module and the data acquisition card, and is configured to provide protocol conversion and adaptation for the data of the channel condition detection module.
The protocol conversion module can ensure that hosts adopting different high-level protocols on the communication network still cooperate with each other to complete various distributed applications. It operates at the transport layer or higher. The interface protocol converter can be completed by using an ASIC chip generally, and has low cost and small volume. It can convert the Ethernet or V.35 data interface of IEEE802.3 protocol and the 2M interface of standard G.703 protocol. Or the conversion CAN be carried out on 232/485/422 serial ports, E1 interfaces, CAN interfaces and 2M interfaces. The protocol conversion module is arranged, so that the system can select components with different protocols when networking, and the networking flexibility is improved.
Optionally, the system further comprises a human-machine interface plug-in for providing an input device interface and a display interface, and for providing interaction between the system and a user. The human-machine operation interface plug-in is connected with the data processing module.
A human machine interface insert, abbreviated HMI, is usually mounted on a cabinet door of an electrical apparatus to enable communication with the electrical apparatus outside the electrical apparatus. The HMI typically comprises, on the outer surface, push buttons and a display screen, or a touch screen, to display operating parameters of the electrical apparatus and the like, while operator instructions can be input by means of the push buttons or the touch screen. The HMI equipment commonly used in the market at present all provides abundant interface, all includes COM mouth, USB mouth, RS485, CAN, RJ45 net twine interface usually, and the HMI product mainly falls into three kinds: the mobile terminal comprises a touch screen, a text terminal and a tablet personal computer, wherein the touch screen is taken as a representative product.
The following illustrates a workflow of an embodiment of the present invention, which is only used to help understanding of the present invention, but does not belong to the technical content of the embodiment.
Fig. 2 is a schematic diagram of a fuzzy control flow of an expert electrostatic precipitator control system according to an embodiment of the present invention. As shown in fig. 2, the fuzzy control process mainly includes fuzzification, control strategy and defuzzification. The fuzzification is mainly achieved by membership functions.
The membership functions in the data processing module comprise:
defining the unit load in the input variable as a high membership function and a low membership function; defining the dust concentration at the outlet of the electrostatic dust collector as three membership functions of high, medium and low; defining the dust concentration at the far end of the outlet of the electrostatic dust collector as a high membership function and a low membership function; the output variables include the electric field power supply and the control signal for ash removal control.
In fuzzy control, it is necessary to define a membership function for each input variable and each output variable, where the membership function for each variable may be two or more segments, and these functions may be one or more combinations of standard functions such as Λ (triangle), Π (trapezoid), S (waveform), and gaussian (bell), and each variable should also be set to have a reasonable data range. And converting the input analog quantity into a corresponding membership function through the selected function and the data range so as to match the fuzzy control rule and output a corresponding fuzzy output quantity.
The rule set defined is as follows: for example: the IF outlet dust concentration IS IS high, the load IS of the AND unit IS high, the remote dust concentration IS IS high, the THEN pulse width IS IS large, AND the ALSO pulse interval IS IS small;
similarly, the load IS of an AND unit in the IF outlet dust concentration IS IS high, the remote dust concentration IS IS high, AND the ALSO pulse interval IS in the THEN pulse width IS IS small;
from the previous membership functions, there are 3 cases of outlet dust concentration, 2 cases of unit load and 2 cases of remote dust concentration, so that a total of 12 rules can be set to cover all input cases. The remaining ten rules are similar to the exemplary rule format and are not further enumerated here.
The defuzzification module adopts an area center defuzzification method. The area center (CoA) defuzzification method is used to ensure the continuity of output quantity, and a fuzzy control program firstly calculates the area of a membership function after conversion in an output variable range. The area-centric defuzzification method effectively calculates the best compromise between multiple output variable terms.
Through the utility model discloses embodiment provides an electrostatic precipitator expert control system can provide a degree of automation height, energy-conserving efficient dust removal mode.
The above describes in detail optional implementation manners of embodiments of the present invention with reference to the accompanying drawings, however, the embodiments of the present invention are not limited to the details in the above implementation manners, and in the technical concept scope of the embodiments of the present invention, it is possible to perform various simple modifications on the technical solutions of the embodiments of the present invention, and these simple modifications all belong to the protection scope of the embodiments of the present invention.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, the embodiments of the present invention do not separately describe various possible combinations.
In addition, various different implementation manners of the embodiments of the present invention can be combined arbitrarily, and as long as it does not violate the idea of the embodiments of the present invention, it should be considered as the disclosure of the embodiments of the present invention.
Claims (10)
1. An electrostatic precipitator expert control system, comprising: the device comprises a channel working condition detection module, a data acquisition card, a data processing module, a data communication module, a power supply control module and an ash removal control module;
the channel working condition detection module is connected with the data processing module through the data acquisition card, and the data processing module is also connected with the power supply control module and the ash removal control module through the data communication module;
the channel working condition detection module is used for detecting the working condition in the channel and transmitting the acquired data to the data acquisition card;
the data processing module is used for receiving data transmitted from the data acquisition card and the data communication module and outputting control instructions to the power supply control module and the ash removal control module.
2. The system according to claim 1, wherein the channel working condition detection module at least comprises a unit load measuring meter, a temperature sensor, an air volume sensor and a dust concentration detection sensor.
3. The system according to claim 1, wherein the data acquisition card is configured to transmit and process the data acquired by the channel condition detection module, and provide basic data support for the data processing module; the data acquisition card is a high-speed data acquisition card.
4. The system of claim 1, wherein the power control module is configured to exchange data with an electric field power device of an electrostatic precipitator, the data exchange comprising: and reading operation parameters from the electric field power supply equipment, and sending a control instruction generated by the data processing module to the electric field power supply equipment for execution.
5. The system of claim 1, wherein the ash removal control module is configured to exchange data with an ash removal device of an electrostatic precipitator, the data exchange comprising: and reading the operation parameters from the ash cleaning equipment, and sending the control instruction generated by the data processing module to the ash cleaning equipment for execution.
6. The system of claim 1, wherein the data communication module is used for communication with the system and comprises communication with the power control module and the ash removal control module.
7. The system of claim 6, wherein the communication peer of the data communication module further comprises at least one of a field distributed control system, a factory level monitoring information system, a management information system, and a big data cloud platform.
8. The system of claim 1, further comprising a data storage module to store historical data and system logs of the system.
9. The system according to claim 1, further comprising a protocol conversion module, said protocol conversion module being disposed between said channel condition detection module and said data acquisition card for providing protocol conversion and adaptation for data of said channel condition detection module.
10. The system of claim 1, further comprising a human machine interface plug-in to provide an input device interface and a display interface for providing interaction between the system and a user.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110201797A (en) * | 2019-07-08 | 2019-09-06 | 浙江明灿科技有限公司 | Electrostatic precipitation expert control system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110201797A (en) * | 2019-07-08 | 2019-09-06 | 浙江明灿科技有限公司 | Electrostatic precipitation expert control system |
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