Control device for ash conveying system of economizer

Abstract

The embodiment of the utility model provides a coal economizer ash conveying system control device. The coal economizer ash conveying system control device comprises a gate valve, a sifter, a blanking dome valve, an ash hopper, a bin pump, an ash conveying pipeline, a DCS (Distributed Control System), a PLC (Programmable Logic Controller), a first state detection module, a second state detection module and a linkage module, the first state detection module is installed on a gate valve, the second state detection module is installed on a blanking dome valve, the first state detection module and the second state detection module are both connected with the DCS, and the linkage module is connected between the first state detection module and the PLC. The closed state of the gate valve serves as an instruction signal for starting the PLC to control the action of the sifter through the linkage module, linkage of the DCS and the PLC is achieved, namely linkage of the gate valve, the sifter and the discharging dome valve is achieved, the situation that no ash can be sifted or no ash exists due to the fact that the sifter is not synchronous with the gate valve and the discharging dome valve is avoided, and the ash conveying efficiency is improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of economizers, and in particular to a control device for an ash conveying system of an economizer. Background Art

[0002] The boiler economizer ash conveying system is mainly responsible for transporting the dust generated by boiler combustion from the economizer to the ash treatment facility. The dust generated by boiler combustion is stored in the ash hopper. Each ash hopper corresponds to a silo pump, and multiple silo pumps are connected in series on an ash conveying pipeline to output the dust.

[0003] In the traditional economizer ash conveying system, a gate valve and a dome valve are installed between the ash hopper and the silo pump from top to bottom. When the dust in the ash hopper needs to be discharged, the ash conveying system control device, that is, the DCS, controls the dome valve to open, and then controls the gate valve to open, thereby ensuring that the dome valve is in the open state when the gate valve is opened; after the discharge is completed, the gate valve and the dome valve are closed in sequence, so that the dust in the ash hopper falls into the silo pump. However, since dust is easy to clump, the block dust easily blocks the channel between the ash hopper and the silo pump, as well as the gate valve and the dome valve, resulting in low dust conveying efficiency. Therefore, to avoid blockage caused by block dust, a screener is installed on the gate valve and the dome valve to screen and break up the dust to facilitate dust conveying.

[0004] Among them, the action of the screener is controlled by PLC, and the PLC control is not synchronized with the DCS control, which causes the screener to be out of synchronization with the gate valve and the blanking dome valve. When the gate valve and the blanking dome valve are opened, the screener does not move, resulting in the screener not screening the dust, that is, the ash is not screened, or, when the screener is in action, the gate valve and the blanking dome valve are closed, and there is no ash to be screened on the screener, affecting the ash conveying efficiency of the economizer. Utility Model Content

[0005] An embodiment of the present application provides a control device for an economizer ash conveying system to solve the technical problems mentioned in the background technology.

[0006] The embodiment of the present application provides a control device for an economizer ash conveying system, comprising: a gate valve, a screen, a blanking dome valve, an ash hopper, a silo pump, an ash conveying pipeline, a distributed control system DCS, a programmable logic controller PLC, a first state detection module, a second state detection module, and a linkage module;

[0007] The gate valve, the screen, and the blanking dome valve are sequentially installed between the ash hopper and the silo pump, and the silo pump is connected to the ash conveying pipeline;

[0008] The first status detection module is installed on the gate valve, and the second status detection module is installed on the blanking dome valve. The first status detection module and the second status detection module are both connected to the DCS, and the linkage module is connected between the first status detection module and the PLC.

[0009] Optionally, the linkage module includes: a relay;

[0010] The coil of the relay is connected to the first state detection module, and the normally open contact of the relay is connected to the PLC.

[0011] Optionally, the first state detection module includes: a first tact switch and a second tact switch;

[0012] The first tact switch is set in the first position of the gate valve, and the second tact switch is set in the second position of the gate valve, wherein the first position is a position where the gate of the gate valve can touch the first tact switch when the gate valve is open, and the second position is a position where the gate of the gate valve can touch the second tact switch when the gate valve is closed;

[0013] The first touch switch and the second touch switch are both connected to the DCS, and the second touch switch is also connected to the linkage module.

[0014] Optionally, the second state detection module includes: a third tact switch and a fourth tact switch;

[0015] The third tact switch is set in the third position of the blanking dome valve, and the fourth tact switch is set in the fourth position of the blanking dome valve, wherein the third position is a position where the rotating disc of the blanking dome valve can touch the third tact switch when the blanking dome valve is open, and the fourth position is a position where the rotating disc of the blanking dome valve can touch the fourth tact switch when the blanking dome valve is closed;

[0016] The third touch switch and the fourth touch switch are both connected to the DCS.

[0017] Optionally, it further includes: a main air intake valve, an auxiliary air intake valve and a pressure detection module, wherein the main air intake valve, the auxiliary air intake valve and the pressure detection module are installed on the ash conveying pipeline, and the pressure detection module is connected to the DCS.

[0018] Optionally, it further includes: a first knob and a first control box, wherein the first knob is connected between the PLC and the first control box.

[0019] Optionally, it further includes a second knob and a second control box, wherein the second knob is connected between the DCS and the second control box.

[0020] The embodiment of the present application provides a control device for an economizer ash conveying system, which includes: a gate valve, a screener, a blanking dome valve, an ash hopper, a silo pump, an ash conveying pipeline, a distributed control system (DCS), a programmable logic controller (PLC), a first state detection module, a second state detection module, and a linkage module; the gate valve, the screener, and the blanking dome valve are sequentially installed between the ash hopper and the silo pump, and the silo pump is connected to the ash conveying pipeline; the first state detection module is installed on the gate valve, and the second state detection module is installed on the blanking dome valve. The first state detection module and the second state detection module are both connected to the DCS, and the linkage module is connected between the first state detection module and the PLC. The linkage module uses the closed state of the gate valve as a command signal to start the PLC to control the action of the screener, thereby realizing the linkage between the DCS and the PLC, that is, realizing the linkage between the gate valve, the screener, and the blanking dome valve, avoiding the situation where there is no ash to be screened or ash is not screened due to the asynchrony between the screener and the gate valve and the blanking dome valve, thereby improving the ash conveying efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0022] Figure 1 A schematic structural diagram of an economizer ash conveying system control device provided in one embodiment of the present application;

[0023] Figure 2 A schematic structural diagram of an economizer ash conveying system control device provided in another embodiment of the present application;

[0024] Figure 3 This is a structural schematic diagram of an economizer ash conveying system control device provided in yet another embodiment of the present application. DETAILED DESCRIPTION

[0025] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0026] Figure 1 This is a schematic diagram of the structure of the economizer ash conveying system control device provided in one embodiment of the present application. Figure 1 As shown, the economizer ash conveying system control device includes: a gate valve 11, a screener 12, a blanking dome valve 13, an ash hopper 14, a silo pump 15, an ash conveying pipeline 16, a distributed control system DCS 17, a programmable logic controller PLC 18, a first state detection module 19, a second state detection module 20 and a linkage module 21;

[0027] The gate valve 11, the screen 12, and the blanking dome valve 13 are sequentially installed between the ash hopper 14 and the silo pump 15, and the silo pump 15 is connected to the ash conveying pipeline 16;

[0028] The first state detection module 19 is installed on the gate valve 11, and the second state detection module 20 is installed on the blanking dome valve 13. The first state detection module 19 and the second state detection module 20 are both connected to the DCS 17, and the linkage module 21 is connected between the first state detection module 19 and the PLC 18.

[0029] Specifically, each ash hopper 14 corresponds to a silo pump 15, and multiple silo pumps 15 transport dust through an ash conveying pipe 16. Among them, a gate valve 11, a screener 12, and a blanking dome valve 13 are successively arranged between the ash hopper 14 and the silo pump 15. The gate valve 11 is used to control the dust in the ash hopper 14 to be output to the screener 12. The screener 12 is used to break up and screen the dust, crush large pieces of dust, and facilitate the dust to be transported to the blanking dome valve 13. The blanking dome valve 13 is used to control the dust to enter the silo pump 15.

[0030] The first state detection module 19 is used to detect the switching state of the gate valve 11 and send the switching state of the gate valve 11 to DCS17; the second state detection module 20 is used to detect the switching state of the blanking dome valve 13 and send the switching state of the blanking dome valve 13 to DCS17. DCS17 is used to receive the switching state of the gate valve 11 and the switching state of the blanking dome valve 13, and control the operation of the gate valve 11 and the blanking dome valve 13 according to the switching state of the gate valve 11 and the switching state of the blanking dome valve 13.

[0031] The first state detection module 19 is connected to the linkage module 21 and is used to control the conduction and disconnection of the linkage module 21. When the switch state of the gate valve 11 is closed, the linkage module 21 is connected; when the switch state of the gate valve 11 is open, the linkage module 21 is disconnected.

[0032] The linkage module 21 is connected to PLC18. When the linkage module 21 is turned on, PLC18 receives a first instruction signal, and the first instruction signal controls PLC18 to control the action of the screener 12. When the linkage module 21 is disconnected, the first instruction signal disappears. When the linkage module 21 is turned on again, PLC18 receives the first instruction signal again.

[0033] The specific process of this embodiment is as follows:

[0034] Start ash conveying and start the economizer ash conveying system control device of this embodiment. At this time, DCS17 and PLC18 are started, and DCS17 controls the blanking dome valve 13 to open. After the blanking dome valve 13 is opened, the second state detection module 20 sends a signal that the blanking dome valve 13 is opened to DCS17. After DCS17 receives the signal that the blanking dome valve 13 is opened, it starts timing internally. When the timing reaches a first preset time, it controls the gate valve 11 to open. The first preset time can be, for example, 1.5s.

[0035] After the gate valve 11 is opened, the first state detection module 19 sends a signal indicating that the gate valve 11 is open to the DCS 17. After receiving the signal indicating that the gate valve 11 is open, the DCS 17 starts timing internally. When the timing reaches a second preset time, the DCS 17 controls the gate valve 11 to close. The second preset time may be 5 seconds, for example.

[0036] After the first state detection module 19 detects that the gate valve 11 is closed, it sends a signal that the gate valve 11 is closed to the DCS 17 and the linkage module 21. The DCS 17 starts timing, and the linkage module 21 is turned on. At this time, the PLC 18 receives the first command signal and starts timing. After the timing reaches a third preset time, the screener 12 is controlled to operate. The third preset time may be, for example, 3.5 seconds.

[0037] The number of times screener 12 operates can be preset in PLC 18. However, it must ensure that screener 12 completes its operation by the time blanking dome valve 13 closes. Therefore, DCS 17 begins timing when gate valve 11 signals it is closed. Once the timing reaches a fourth preset duration, blanking dome valve 13 closes. This fourth preset duration is related to the number of times screener 12 operates and can be adjusted based on actual conditions.

[0038] In addition, the first preset time length, the second preset time length, and the third preset time length can also be adjusted.

[0039] After the blanking dome valve 13 is closed, the dust in the ash hopper 14 completes one ash conveying.

[0040] In this embodiment, the control device of the economizer ash conveying system includes: a gate valve 11, a screener 12, a blanking dome valve 13, an ash hopper 14, a silo pump 15, an ash conveying pipeline 16, a distributed control system DCS17, a programmable logic controller PLC18, a first state detection module 19, a second state detection module 20, and a linkage module 21; the gate valve 11, the screener 12, and the blanking dome valve 13 are installed in sequence between the ash hopper 14 and the silo pump 15, and the silo pump 15 is connected to the ash conveying pipeline 16; the first state detection module 19 is installed on the gate valve 11, and the second state detection module 20 is installed on the blanking dome valve 13. The first state detection module 19 and the second state detection module 20 are both connected to the DCS17, and the linkage module 21 is connected between the first state detection module 19 and the PLC18. Through the linkage module 21, the closed state of the gate valve 11 is used as the instruction signal to start the PLC18 to control the action of the screener 12, thereby realizing the linkage of the DCS17 and the PLC18, that is, realizing the linkage of the gate valve 11, the screener 12, and the blanking dome valve 13, thereby avoiding the situation where there is no ash to be screened or ash is not screened due to the lack of synchronization between the screener 12 and the gate valve 11 and the blanking dome valve 13, thereby improving the ash conveying efficiency.

[0041] Optionally, the linkage module 21 includes: a relay;

[0042] The coil of the relay is connected to the first state detection module 19 , and the normally open contact of the relay is connected to the PLC 18 .

[0043] Specifically, the coil of the relay is connected to the first state detection module 19. When the first state detection module 19 detects that the gate valve 11 is closed, the coil of the relay is energized, the normally open contact is closed, and the PLC 18 receives the first command signal. The first command signal is, for example, a rising edge signal.

[0044] When the gate valve 11 is opened, the coil of the relay loses power and the normally open contact is reset and disconnected. When the gate valve 11 is closed again, the coil of the relay loses power again, and the cycle is repeated to carry out ash conveying.

[0045] In this embodiment, a relay is used as a linkage device to realize the gate valve 11, the screener 12, and the blanking dome valve 13, wherein the coil of the relay is connected to the first state detection module 19, and the normally open contact of the relay is connected to the PLC 18, so that the linkage module 21 has a simple structure and is easy to implement, and there is no need to change the structure of the existing economizer ash conveying system control device.

[0046] Optional, such as Figure 2 As shown, the first state detection module 19 includes: a first touch switch 191 and a second touch switch 192;

[0047] The first touch switch 191 is set at the first position of the gate valve 11, and the second touch switch 192 is set at the second position of the gate valve 11. The first position is the position where the gate of the gate valve 11 can touch the first touch switch 191 when the gate valve 11 is open, and the second position is the position where the gate of the gate valve 11 can touch the second touch switch 192 when the gate valve 11 is closed.

[0048] The first touch switch 191 and the second touch switch 192 are both connected to the DCS 17 , and the second touch switch 192 is also connected to the linkage module 21 .

[0049] Specifically, the opening and closing of the gate valve 11 is achieved through the gate plate. Therefore, when the gate valve 11 is opened, the gate plate can touch the position of the first touch switch 191, that is, the first touch switch 191 is installed at the first position. When the gate valve 11 is closed, the gate plate of the gate valve 11 can touch the position of the second touch switch 192, that is, the second touch switch 192 is installed at the second position.

[0050] In this way, when the gate valve 11 is opened, the gate contacts the first touch switch 191, and the first touch switch 191 sends a signal to the DCS17 to open the gate valve 11. The DCS17 starts timing, and when the timing reaches the second preset time, the DCS17 controls the gate valve 11 to close.

[0051] When gate valve 11 is closed, the gate plate contacts second touch switch 192, which sends a signal to DCS 17 indicating the closing of gate valve 11. DCS 17 then begins timing. After the timing reaches a fourth preset duration, it controls the closing of dome valve 13. Simultaneously, second touch switch 192 sends the signal to close gate valve 11 to the relay coil, energizing the relay coil and closing the normally open contacts. This causes PLC 18 to receive the first command signal and activate PLC 18. At this point, PLC 18 begins timing, and after the timing reaches a third preset duration, it controls the operation of screener 12.

[0052] In this embodiment, the first state detection module 19 includes a first touch switch 191 and a second touch switch 192. The first touch switch 191 is set in the first position of the gate valve 11, and the second touch switch 192 is set in the second position of the gate valve 11. The first position is when the gate valve 11 is open, and the gate of the gate valve 11 can touch the first touch switch 191. The second position is when the gate valve 11 is closed, and the gate of the gate valve 11 can touch the second touch switch 192. The first touch switch 191 and the second touch switch 192 are both connected to the DCS 17, and the second touch switch 192 is also connected to the linkage module 21. The first touch switch 191 and the second touch switch 192 are used to detect the open and close state of the gate valve 11, thereby achieving linkage between the gate valve 11, the screener 12, and the blanking dome valve 13. This has a simple structure, low cost, and is easy to implement.

[0053] Optional, such as Figure 2 As shown, the second state detection module 20 includes: a third touch switch 201 and a fourth touch switch 202;

[0054] The third touch switch 201 is set in the third position of the blanking dome valve 13, and the fourth touch switch 202 is set in the fourth position of the blanking dome valve 13. The third position is the position where the rotating disk of the blanking dome valve 13 can touch the third touch switch 201 when the blanking dome valve 13 is open, and the fourth position is the position where the rotating disk of the blanking dome valve 13 can touch the fourth touch switch 202 when the blanking dome valve 13 is closed.

[0055] The third touch switch 201 and the fourth touch switch 202 are both connected to the DCS 17 .

[0056] Specifically, the dome valve 13 is opened and closed by a rotating disc. Therefore, the on / off state of the dome valve 13 can be determined by detecting the position of the rotating disc. Therefore, when the dome valve 13 is open, the rotating disc of the dome valve 13 can touch the position of the third tact switch 201, i.e., the third tact switch 201 is installed in the third position. When the dome valve 13 is closed, the rotating disc of the dome valve 13 can touch the position of the fourth tact switch 202, i.e., the fourth tact switch 202 is installed in the fourth position.

[0057] In this way, when the blanking dome valve 13 is opened, the rotating disc will abut against the third touch switch 201, and the third touch switch 201 will send a signal to DCS17 to open the blanking dome valve 13. DCS17 starts timing, and when the timing reaches the first preset time, the gate valve 11 is controlled to open; when the blanking dome valve 13 is closed, the rotating disc will abut against the fourth touch switch 202, and the fourth touch switch 202 will send a signal to DCS17 to close the blanking dome valve 13. DCS17 starts timing, and when the timing reaches the fourth preset time, the blanking dome valve 13 is controlled to close.

[0058] In this embodiment, the second state detection module 20 includes a third touch switch 201 and a fourth touch switch 202. The third touch switch 201 is set in the third position of the blanking dome valve 13, and the fourth touch switch 202 is set in the fourth position of the blanking dome valve 13. The third position is when the blanking dome valve 13 is open, and the rotating disk of the blanking dome valve 13 can touch the third touch switch 201. The fourth position is when the blanking dome valve 13 is closed, and the rotating disk of the blanking dome valve 13 can touch the fourth touch switch 202. The third touch switch 201 and the fourth touch switch 202 are both connected to the DCS 17. The third touch switch 201 and the fourth touch switch 202 are used to detect the switch state of the blanking dome valve 13, thereby realizing the linkage between the gate valve 11, the screener 12, and the blanking dome valve 13. This has a simple structure, low cost, and is easy to implement.

[0059] Optionally, the economizer ash conveying system control device further includes: a main air intake valve, an auxiliary air intake valve and a pressure detection module, the main air intake valve, the auxiliary air intake valve and the pressure detection module are installed on the ash conveying pipeline 16, and the pressure detection module is connected to the DCS17.

[0060] Specifically, the main air intake valve and the auxiliary air intake valve are used to deliver gas to the ash conveying pipeline 16 so that dust is output from the ash conveying pipeline 16 , and the pressure detection module is used to detect the pressure in the ash conveying pipeline 16 .

[0061] When the dome valve 13 is closed, DCS17 controls the main air intake valve and the auxiliary air intake valve to open, supplying gas to the ash conveying pipe 16. The pressure detection module detects the pressure in the ash conveying pipe 16 and transmits the pressure in the ash conveying pipe 16 to DCS17. When all the dust in the ash conveying pipe 16 is discharged, the main air intake valve and the auxiliary air intake valve are still supplying gas to the ash conveying pipe 16, causing the pressure in the ash conveying pipe 16 to increase. When the pressure in the ash conveying pipe 16 reaches the preset pressure, DCS17 controls the main air intake valve and the auxiliary air intake valve to close, completing one ash conveying cycle. At this time, DCS17 starts timing, and when the timing reaches the duration corresponding to the set ash conveying cycle, the next ash conveying cycle is started.

[0062] The pressure detection module may be, for example, a pressure sensor.

[0063] In this embodiment, the economizer ash conveying system control device further includes a main air intake valve, an auxiliary air intake valve, and a pressure detection module. The main air intake valve, the auxiliary air intake valve, and the pressure detection module are installed on the ash conveying pipeline 16, and the pressure detection module is connected to the DCS 17. This achieves efficient dust removal from the ash conveying pipeline 16, improving ash conveying efficiency.

[0064] Optional, such as Figure 3 As shown, the economizer ash conveying system control device further includes: a first knob 22 and a first control box 23 , and the first knob 22 is connected between the PLC 18 and the first control box 23 .

[0065] Specifically, the screener 12 can not only be automatically remotely controlled by the PLC 18, in which case the screener 12 can be automatically controlled by the PLC 18, but can also be manually controlled on-site.

[0066] A first control box 23 can be installed near the economizer ash conveying system. It is equipped with multiple control buttons. Operators, following the economizer ash conveying process, press the corresponding control buttons on the first control box 23 to send instructions to the PLC 18, causing it to execute the corresponding actions. The screener 12 can be switched between automatic remote control and manual local control using a first knob 22. When the first knob connects the PLC 18 to the first control box 23, the screener 12 is manually controlled. When the first knob disconnects the PLC 18 from the first control box 23, the screener 12 is automatically remotely controlled. Alternatively, the first knob 22 can be located on the first control box 23.

[0067] In this embodiment, by setting the first knob 22 and the first control box 23, the first knob 22 is connected between the PLC18 and the first control box 23 to realize the switching between automatic remote control and manual on-site control of the screener 12, so that during maintenance, the control mode can be switched to manual on-site control, which is convenient for maintenance and also improves the reliability of the economizer ash conveying system control device.

[0068] Optional, such as Figure 3 As shown, the economizer ash conveying system control device further includes: a second knob 24 and a second control box 25 , and the second knob 24 is connected between the DCS 17 and the second control box 25 .

[0069] Specifically, a second control box 25 can be installed near the economizer ash conveying system. The second control box 25 is used to manually control the gate valve 11 and the dome valve 13. The second control box 25 is equipped with multiple control buttons. When the second knob 24 connects the DCS 17 to the second control box 25, the gate valve 11 and the dome valve 13 are manually controlled. At this time, according to the economizer ash conveying operation process, the operator sends instructions to the DCS 17 by operating the corresponding control buttons on the second control box 25, causing the DCS 17 to perform the corresponding actions. When the second knob 24 disconnects the DCS 17 from the second control box 25, the gate valve 11 and the dome valve 13 are automatically controlled remotely. Optionally, the second knob 24 can be installed on the second control box 25.

[0070] When the gate valve 11 and the blanking dome valve 13 are manually controlled locally, the staff operates the second control box 25 to send instructions to the DCS 17, so that the DCS 17 executes the set program.

[0071] In this embodiment, by providing a second knob 24 and a second control box 25, the second knob 24 is connected between the DCS 17 and the second control box 25, so as to realize the switching between automatic remote control and manual local control of the gate valve 11 and the blanking dome valve 13, so that during maintenance, the control mode can be switched to manual local control, which facilitates maintenance and improves the reliability of the economizer ash conveying system control device.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A control device for an economizer ash conveying system, characterized in that: include: Gate valve, screener, blanking dome valve, ash hopper, silo pump, ash conveying pipeline, distributed control system DCS, programmable logic controller PLC, first state detection module, second state detection module, linkage module; The gate valve, the screen, and the blanking dome valve are sequentially installed between the ash hopper and the silo pump, and the silo pump is connected to the ash conveying pipeline; The first status detection module is installed on the gate valve, and the second status detection module is installed on the blanking dome valve. The first status detection module and the second status detection module are both connected to the DCS, and the linkage module is connected between the first status detection module and the PLC.

2. The economizer ash conveying system control device according to claim 1, characterized in that: The linkage module includes: a relay; The coil of the relay is connected to the first state detection module, and the normally open contact of the relay is connected to the PLC.

3. The economizer ash conveying system control device according to claim 1, characterized in that: The first state detection module includes: a first tact switch and a second tact switch; The first tact switch is set in the first position of the gate valve, and the second tact switch is set in the second position of the gate valve, wherein the first position is a position where the gate of the gate valve can touch the first tact switch when the gate valve is open, and the second position is a position where the gate of the gate valve can touch the second tact switch when the gate valve is closed; The first touch switch and the second touch switch are both connected to the DCS, and the second touch switch is also connected to the linkage module.

4. The economizer ash conveying system control device according to claim 2, characterized in that: The second state detection module includes: a third touch switch and a fourth touch switch; The third tact switch is set in the third position of the blanking dome valve, and the fourth tact switch is set in the fourth position of the blanking dome valve, wherein the third position is a position where the rotating disc of the blanking dome valve can touch the third tact switch when the blanking dome valve is open, and the fourth position is a position where the rotating disc of the blanking dome valve can touch the fourth tact switch when the blanking dome valve is closed; The third touch switch and the fourth touch switch are both connected to the DCS.

5. The economizer ash conveying system control device according to claim 1, characterized in that: Also includes: A main air intake valve, an auxiliary air intake valve and a pressure detection module are installed on the ash conveying pipeline, and the pressure detection module is connected to the DCS.

6. The economizer ash conveying system control device according to claim 1, characterized in that: Also includes: A first knob and a first control box, wherein the first knob is connected between the PLC and the first control box.

7. The economizer ash conveying system control device according to any one of claims 1 to 6, characterized in that: The invention also includes a second knob and a second control box, wherein the second knob is connected between the DCS and the second control box.

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