An electrostatic precipitator ash delivery device

Abstract

The utility model discloses an electric precipitator ash conveying device, including hopper, pneumatic double -layer ash valve, pneumatic plug valve, scraper conveyor, the outlet of hopper's ash removal pipeline communicates with scraper conveyor, and pneumatic double -layer ash valve and pneumatic plug valve all set up on ash removal pipeline, and pneumatic double -layer ash valve is located pneumatic plug valve top, and pneumatic plug valve includes valve cavity, valve plate, drive part, the valve cavity includes inner valve cavity and outer valve cavity, the inner valve cavity with pneumatic double -layer ash valve's bottom outlet communicates, drive part installs in pneumatic plug valve outside, and its output end is fixedly connected with the valve plate set up in valve cavity, is used for driving valve plate from outer valve cavity motion to inner valve cavity to thereby block up pneumatic double -layer ash valve's bottom outlet, and drive valve plate from inner valve cavity motion to outer valve cavity to thereby open pneumatic double -layer ash valve's bottom outlet. The device can effectively reduce the air leakage of electric precipitator hopper bottom, and reduce the energy consumption loss of main exhaust fan.

Description

Technical Field

[0001] This utility model relates to the technical field of electrostatic precipitators, and in particular to an ash conveying device for an electrostatic precipitator. Background Technology

[0002] The electrostatic precipitator (ESP) at the sintering machine head is mainly used to capture and purify dust in the sintering flue gas system, ensuring that the particulate matter at the ESP outlet meets environmental emission standards. The ash conveying device below each ash hopper of the ESP typically consists of a manual slide gate valve, a double-layer ash discharge valve, and a scraper conveyor, all made of ordinary carbon steel. The manual slide gate valve is mainly used for maintenance and closure, acting as an isolation mechanism. The double-layer ash discharge valve discharges ash from the ash hopper to the scraper conveyor and also provides a seal. Because the dust collected by the ESP at the machine head has moisture, stickiness, and corrosive properties, it easily adheres and cakes on the mushroom head of the double-layer ash discharge valve, preventing it from closing completely. This causes severe air leakage in the ash conveying system, resulting in energy loss from the sintering machine's main exhaust fan. The incoming air can also cause excessive oxygen content in the subsequent dry desulfurization and denitrification systems, and the moisture in the air entering the ESP can easily cause condensation corrosion and dust caking. Utility Model Content

[0003] The technical problem to be solved by this utility model is to address the above-mentioned deficiencies in the existing technology by providing an ash conveying device for an electrostatic precipitator. The ash conveying device can effectively reduce the air leakage at the bottom of the ash hopper of the electrostatic precipitator and reduce the energy consumption loss of the main exhaust fan.

[0004] To solve the above problems, the present invention adopts the following technical solution:

[0005] An electrostatic precipitator ash conveying device includes an ash hopper, a pneumatic double-layer ash discharge valve, a pneumatic slide gate valve, and a scraper conveyor. The outlet of the ash discharge pipe of the ash hopper is connected to the scraper conveyor. The pneumatic double-layer ash discharge valve and the pneumatic slide gate valve are both installed on the ash discharge pipe, with the pneumatic double-layer ash discharge valve located above the pneumatic slide gate valve. The pneumatic slide gate valve includes a valve cavity, a valve plate, and a driving component. The valve cavity includes an inner valve cavity and an outer valve cavity. The inner valve cavity is connected to the bottom outlet of the pneumatic double-layer ash discharge valve. The driving component is installed outside the pneumatic slide gate valve, and its output end is fixedly connected to the valve plate installed in the valve cavity. It is used to drive the valve plate from the outer valve cavity to the inner valve cavity to block the bottom outlet of the pneumatic double-layer ash discharge valve, and to drive the valve plate from the inner valve cavity to the outer valve cavity to open the bottom outlet of the pneumatic double-layer ash discharge valve.

[0006] Preferably, the inner valve cavity and the outer valve cavity are separated by a first partition, and the first partition is provided with a first through hole for the valve plate to pass through, and the length of the valve plate is longer than the length of the inner valve cavity.

[0007] Preferably, the inner valve cavity is provided with a first sealing part and a second sealing part, the driving member is disposed on the outer wall of the first side wall of the outer valve cavity away from the inner valve cavity, the first sealing part is disposed on the inner wall of the second side wall of the inner valve cavity away from the outer valve cavity and opposite to the first side wall, and the second sealing part is disposed on the third side wall and the fourth side wall perpendicularly connected to the first side wall. When the valve plate is inserted into the inner valve cavity, the end of the valve plate away from the driving member is inserted into the first sealing part, and the two sides of the valve plate are inserted into the second sealing part.

[0008] Preferably, the first sealing part includes a first sealing plate and a second sealing plate, which are disposed vertically opposite to each other and form a first sealing groove between them. The thickness of the first sealing groove is adapted to the thickness of the valve plate. The second sealing part includes a third sealing plate and a fourth sealing plate, which are disposed vertically opposite to each other and form a second sealing groove between them. The thickness of the second sealing groove is adapted to the thickness of the valve plate.

[0009] Preferably, the outer valve cavity is further provided with a first guide portion, which is disposed on the fifth and sixth side walls that are perpendicularly connected to the first side wall, and the driving member drives the valve plate to slide within the first guide portion.

[0010] Preferably, the first guide portion includes a first guide plate and a second guide plate, which are disposed opposite to each other and form a first guide groove between them. The thickness of the first guide groove is adapted to the thickness of the valve plate.

[0011] Preferably, the second sealing plate, the fourth sealing plate, and the second guide plate are provided with multiple ash discharge grooves at intervals.

[0012] Preferably, the first sealing plate, the second sealing plate, the third sealing plate, the fourth sealing plate, the first guide plate, and the second guide plate are all made of polytetrafluoroethylene.

[0013] Preferably, the valve plate is made of steel lined with polytetrafluoroethylene, and the end of the valve plate away from the drive component has a chamfered structure.

[0014] Preferably, the ash conveying device of the electrostatic precipitator further includes a manual slide gate valve, which is installed on the ash discharge pipe and located above the pneumatic double-layer ash discharge valve. The pneumatic double-layer ash discharge valve includes an upper valve and a lower valve. The upper valve includes an upper valve chamber and an upper mushroom head, and the lower valve includes a lower valve chamber and a lower mushroom head. The inlet of the upper valve chamber is connected to the upper part of the ash discharge pipe, and the upper mushroom head is located between the inlet of the upper valve chamber and the upper part of the ash discharge pipe. The outlet of the lower valve chamber is connected to the lower part of the ash discharge pipe, and the lower mushroom head is located between the inlet of the lower valve chamber and the outlet of the upper valve chamber.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects:

[0016] (1) In this utility model, a pneumatic slide gate valve is added to the lower part of the pneumatic double-layer ash discharge valve. When the upper mushroom head of the pneumatic double-layer ash discharge valve is open and closed, the pneumatic slide gate valve is in the closed state; when the upper mushroom head of the pneumatic double-layer ash discharge valve is closed and the lower mushroom head is open, the pneumatic slide gate valve is in the closed state; when the upper and lower mushroom heads of the pneumatic double-layer ash discharge valve are closed at the same time, the pneumatic slide gate valve is in the open state for ash discharge, which can effectively increase the sealing performance and reduce the air leakage.

[0017] (2) In this utility model, the valve plate of the pneumatic slide gate valve is made of steel-lined polytetrafluoroethylene. The use of steel plate as the base material ensures the strength and hardness of the valve plate. Since polytetrafluoroethylene has excellent corrosion resistance, high temperature resistance and outstanding surface non-stick and wear resistance, the pneumatic slide gate valve has good sealing performance and long service life. The valve plate head adopts a chamfered structure, which can avoid the phenomenon of the valve plate not closing tightly due to the accumulation of dust in the first sealing part. This completely solves the problem of electrostatic precipitator dust adhering and sticking to the valve plate and causing blockage, thus ensuring the sealing performance of the pneumatic slide gate valve.

[0018] (3) In this utility model, the first sealing part, the second sealing part, and the first guide part are all made of polytetrafluoroethylene. The second sealing plate, the fourth sealing plate, and the second guide plate are all provided with ash discharge grooves. When the valve plate moves, the ash accumulated in the first sealing part, the second sealing part, and the first guide part falls automatically through the ash discharge grooves, which effectively prevents the electrostatic precipitator ash from adhering and caking inside, and ensures the sealing performance of the pneumatic slide valve. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the ash conveying device of the electrostatic precipitator in Embodiment 1 of this utility model;

[0020] Figure 2 This is a schematic diagram of the ash conveying device of an electrostatic precipitator in the prior art;

[0021] Figure 3 This is a side sectional view of the pneumatic slide gate valve in Embodiment 1 of this utility model;

[0022] Figure 4 This is a top view of the pneumatic slide gate valve in Embodiment 1 of this utility model;

[0023] Figure 5 This is a top view of the valve plate in Embodiment 1 of this utility model;

[0024] Figure 6 This is a front view of the valve plate in Embodiment 1 of this utility model;

[0025] Figure 7 This is a cross-sectional view of the valve plate in Embodiment 1 of this utility model.

[0026] In the diagram: 100-ash hopper, 110-ash discharge pipe, 200-pneumatic double-layer ash discharge valve, 210-upper valve chamber, 220-upper mushroom head, 230-lower valve chamber, 240-lower mushroom head, 300-pneumatic slide gate valve, 311-inner valve chamber, 312-outer valve chamber, 320-valve plate, 330-driving component, 340-first partition plate, 341-first perforation, 350-first sealing part, 351-first sealing plate, 352-second sealing plate, 353-first sealing groove, 360 - Second sealing part, 361- Third sealing plate, 362- Fourth sealing plate, 363- Second sealing groove, 370- First guide part, 371- First guide plate, 372- Second guide plate, 373- First guide groove, 380- First side wall, 381- Second side wall, 382- Third side wall, 383- Fourth side wall, 384- Fifth side wall, 385- Sixth side wall, 400- Scraper conveyor, 500- Manual slide gate valve, 600- Ash discharge chute, 700- Sealing element. Detailed Implementation

[0027] The technical solutions of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of this utility model.

[0028] In the description of this utility model, it should be noted that the terms "above" and other indications of orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience and simplification of description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection," "setting," "installation," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] Example 1

[0032] like Figures 1-6 As shown, this embodiment discloses an ash conveying device for an electrostatic precipitator, including an ash hopper 100, a pneumatic double-layer ash discharge valve 200, a pneumatic slide valve 300, and a scraper conveyor 400. The bottom outlet of the ash hopper 100 is connected to an ash discharge pipe 110, and the outlet of the ash discharge pipe 110 is connected to the scraper conveyor 400, used to convey the ash in the ash hopper 100 to the scraper conveyor 400, which is used to convey the ash to other processes.

[0033] like Figure 1 As shown, in this embodiment, both the pneumatic double-layer ash discharge valve 200 and the pneumatic slide gate valve 300 are installed on the ash discharge pipe 110, and the pneumatic double-layer ash discharge valve 200 is located above the pneumatic slide gate valve 300. Specifically, the pneumatic slide gate valve 300 includes a valve cavity, a valve plate 320, and a driving component 330. The valve chamber includes an inner valve chamber 311 and an outer valve chamber 312, which are arranged perpendicular to the ash discharge pipe 110. The inner valve chamber 311 is connected to the bottom outlet of the pneumatic double-layer ash discharge valve 200. The drive unit 330 is installed outside the pneumatic slide gate valve 300, and its output end is fixedly connected to the valve plate 320 located in the valve chamber. It is used to drive the valve plate 320 from the outer valve chamber 312 to the inner valve chamber 311, thereby blocking the bottom outlet of the pneumatic double-layer ash discharge valve 200. At this time, the ash in the ash discharge pipe 110 is blocked on the valve plate 320, and the valve plate 320 is driven from the inner valve chamber 311 to the outer valve chamber 312, thereby opening the bottom outlet of the pneumatic double-layer ash discharge valve 200. At this time, the ash in the ash discharge pipe 110 can directly enter the scraper conveyor 400 below. The drive unit 330 is a cylinder.

[0034] like Figure 3 As shown, the inner valve chamber 311 and the outer valve chamber 312 are separated by a first partition 340, and the first partition 340 is provided with a first through hole for the valve plate 320 to pass through. The shape of the first through hole is adapted to the cross-sectional shape of the valve plate 320 so that the valve plate 320 can pass smoothly through the first through hole. The length of the valve plate 320 is longer than the length of the inner valve chamber 311, so that the valve plate 320 can completely block the bottom outlet of the pneumatic double-layer ash discharge valve 200.

[0035] Optionally, a seal 700 is also provided at the bolt connection of the first partition 340.

[0036] like Figure 3 , Figure 4As shown, the inner valve cavity 311 is further provided with a first sealing part 350 and a second sealing part 360. The driving member 330 is disposed on the outer wall of the first side wall 380 of the outer valve cavity 312 away from the inner valve cavity 311. The first sealing part 350 is disposed on the inner wall of the second side wall 381 of the inner valve cavity 311 away from the outer valve cavity 312 and opposite to the first side wall 380. The first partition 340 is located between the first side wall 380 and the second side wall 381 and is parallel to the first side wall 380 and the second side wall 381. The second sealing part 360 is provided in two sets, and the two sets of second sealing parts 360 are respectively disposed on the third side wall 382 and the fourth side wall 383 which are perpendicularly connected to the first side wall 380. When the valve plate 320 is inserted into the inner valve cavity 311, the end of the valve plate 320 away from the driving member 330 is inserted into the first sealing part 350, and the two sides of the valve plate 320 are inserted into the second sealing part 360.

[0037] like Figure 3 As shown, the first sealing part 350 includes a first sealing plate 351 and a second sealing plate 352, which are arranged vertically opposite each other, forming a first sealing groove 353 between them. The thickness of the first sealing groove 353 is adapted to the thickness of the valve plate 320. When the valve plate 320 is inserted into the inner valve cavity 311, the end of the valve plate 320 away from the drive member 330 is inserted into the first sealing groove 353. The second sealing part 360 includes a third sealing plate 361 and a fourth sealing plate 362, which are arranged vertically opposite each other, forming a second sealing groove 363 between them. The thickness of the second sealing groove 363 is adapted to the thickness of the valve plate 320. When the valve plate 320 is inserted into the inner valve cavity 311, both sides of the valve plate 320 are inserted into the second sealing groove 363. The first sealing part 350 and the second sealing part 360 effectively increase the sealing performance of the pneumatic slide gate valve 300. In addition, the second sealing groove 363 also serves to guide the valve plate 320.

[0038] like Figure 3 , Figure 4 As shown, the outer valve cavity 312 is further provided with a first guide portion 370. Two sets of the first guide portions 370 are respectively disposed on the fifth side wall 384 and the sixth side wall 385, which are perpendicularly connected to the first side wall 380. The driving member 330 drives the valve plate 320 to slide within the first guide portion 370. Specifically, the first guide portion 370 includes a first guide plate 371 and a second guide plate 372, which are arranged vertically opposite to each other, forming a first guide groove 373 between them. The thickness of the first guide groove 373 is adapted to the thickness of the valve plate 320. The first guide groove 373 and the second sealing groove 363 are located on the same straight line, and both together provide guidance for the valve.

[0039] like Figure 3Multiple ash discharge grooves 600 are provided at intervals on the second sealing plate 352 at the bottom of the first sealing part 350, the fourth sealing plate 362 at the bottom of the second sealing part 360, and the second guide plate 372 at the bottom of the first guide part 370, respectively, for discharging ash adhering to the first sealing groove 353, the second sealing groove 363, the first guide groove 373, and the ash adhering to the valve plate 320.

[0040] In this embodiment, the first sealing plate 351, the second sealing plate 352, the third sealing plate 361, the fourth sealing plate 362, the first guide plate 371, and the second guide plate 372 are all made of polytetrafluoroethylene (PTFE). PTFE has excellent corrosion resistance, high-temperature resistance, and outstanding surface non-stick and wear resistance, effectively preventing dust from adhering to and sticking in the first sealing groove 353, the second sealing groove 363, and the first guide groove 373, thus giving the pneumatic slide gate valve 300 good sealing performance and a long service life.

[0041] like Figures 5-7 As shown, in this embodiment, the valve plate 320 is made of steel-lined polytetrafluoroethylene (PTFE). Using steel as the base material ensures the strength and hardness of the valve plate 320. Furthermore, the excellent corrosion resistance, high-temperature resistance, and outstanding non-stick and wear-resistant properties of PTFE effectively prevent dust from adhering to the valve plate 320. The end of the valve plate 320 furthest from the drive component 330 has a chamfered structure. This structure prevents dust accumulation in the first sealing groove 353 (bottom), which could cause the valve plate 320 to not close properly. This completely solves the problem of electrostatic precipitator dust adhering and accumulating on the valve plate 320, causing blockage and ensuring the sealing performance of the slide gate valve.

[0042] like Figure 1 As shown, the ash conveying device of the electrostatic precipitator also includes a manual slide gate valve 500. The manual slide gate valve 500 is installed on the ash discharge pipe 110 and located above the pneumatic double-layer ash discharge valve 200. The manual slide gate valve 500 is mainly used to close during maintenance and to isolate the ash discharge. At other times, it is normally open.

[0043] Specifically, the pneumatic double-layer ash discharge valve 200 includes an upper valve chamber 210, a lower valve chamber 230, an upper mushroom head 220, and a lower mushroom head 240. The upper valve chamber 210 is connected to the upper part of the ash discharge pipe 110, the upper mushroom head 220 is located between the upper valve chamber 210 and the upper part of the ash discharge pipe 110, the lower valve chamber 230 is connected to the lower part of the ash discharge pipe 110, and the lower mushroom head 240 is located between the lower valve chamber 230 and the lower part of the ash discharge pipe 110.

[0044] In this embodiment, the main body of the manual slide gate valve 500, the pneumatic double-layer ash discharge valve 200, the pneumatic slide gate valve 300, and the scraper conveyor 400 are all made of carbon steel, and the pneumatic double-layer ash discharge valve 200 and the pneumatic slide gate valve 300 are interlocked.

[0045] The ash conveying process of the electrostatic precipitator ash conveying device in this embodiment is as follows:

[0046] The manual slide valve 500 remains normally open.

[0047] First, the upper mushroom head 220 and lower mushroom head 240 of the pneumatic double-layer ash discharge valve 200 and the pneumatic slide valve 300 are all kept closed, and the ash in the ash hopper 100 falls onto the upper mushroom head 220 of the pneumatic double-layer ash discharge valve 200 along the ash conveying pipe.

[0048] Then, the upper mushroom head 220 of the pneumatic double-layer ash discharge valve 200 is opened, while the lower mushroom head 240 and the pneumatic slide valve 300 remain closed, and the ash falls into the upper valve chamber 210 of the pneumatic double-layer ash discharge valve 200.

[0049] The upper mushroom head 220 of the pneumatic double-layer ash discharge valve 200 is closed, the lower mushroom head 240 of the pneumatic double-layer ash discharge valve 200 is open, the pneumatic slide valve 300 remains closed, and the ash falls into the lower valve chamber 230 of the pneumatic double-layer ash discharge valve 200.

[0050] The upper mushroom head 220 and the lower mushroom head 240 of the pneumatic double-layer ash discharge valve 200 are both closed, and the pneumatic slide valve 300 is both open. Ash falls into the scraper conveyor 400 along the ash discharge pipe 110.

[0051] The above is one ash conveying process. After one ash conveying process is completed, the pneumatic slide gate valve 300 is closed, and the next ash conveying process is started in a pneumatic cycle.

[0052] As can be seen, keeping at least two valves closed in each step of the ash conveying process can effectively increase the sealing of the ash conveying pipeline, thereby reducing air leakage.

[0053] In this embodiment, the ash conveying device of the electrostatic precipitator adds a pneumatic slide gate valve 300 at the lower part of the pneumatic double-layer ash discharge valve 200. When the upper mushroom head 220 of the pneumatic double-layer ash discharge valve 200 is open and the lower mushroom head 240 is closed, the pneumatic slide gate valve 300 is in the closed state; when the upper mushroom head 220 of the pneumatic double-layer ash discharge valve 200 is closed and the lower mushroom head 240 is open, the pneumatic slide gate valve 300 is in the closed state; when both the upper mushroom head 220 and the lower mushroom head 240 of the pneumatic double-layer ash discharge valve 200 are closed at the same time, the pneumatic slide gate valve 300 is in the open state for ash discharge, which can effectively increase the sealing performance and reduce the air leakage. Furthermore, the valve plate 320 of the pneumatic slide gate valve 300 is made of steel-lined polytetrafluoroethylene (PTFE). Using steel plate as the base material ensures the strength and hardness of the valve plate 320. Due to the excellent corrosion resistance, high temperature resistance, and outstanding non-stick and wear resistance of PTFE, the pneumatic slide gate valve 300 has good sealing performance and a long service life. The head of the valve plate 320 adopts a chamfered structure, which can avoid the phenomenon of dust accumulation in the first sealing part 350 causing the valve plate 320 to not close tightly. This completely solves the problem of electrostatic precipitator dust adhering and sticking to the valve plate 320, causing blockage, and ensures the sealing performance of the pneumatic slide gate valve 300. Furthermore, the first sealing part 350, the second sealing part 360, and the first guide part 370 are all made of polytetrafluoroethylene. The second sealing plate 352, the fourth sealing plate 362, and the second guide plate 372 are all provided with ash discharge grooves 600. When the valve plate 320 moves, the ash accumulated in the first sealing part 350, the second sealing part 360, and the first guide part 370 automatically falls down through the ash discharge grooves 600, effectively preventing the electrostatic precipitator ash from adhering and caking inside, and ensuring the sealing performance of the pneumatic slide valve 300.

[0054] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of this utility model, and the utility model is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of this utility model, and these modifications and improvements are also considered to be within the protection scope of this utility model.

Claims

1. A dust conveying device for an electrostatic precipitator, characterized in that, Includes ash hopper, pneumatic double-layer ash discharge valve, pneumatic slide gate valve, and scraper conveyor. The outlet of the ash discharge pipe of the ash hopper is connected to the scraper conveyor. Both the pneumatic double-layer ash discharge valve and the pneumatic slide gate valve are installed on the ash discharge pipe, and the pneumatic double-layer ash discharge valve is located above the pneumatic slide gate valve. The pneumatic slide gate valve includes a valve chamber, a valve plate, and a drive component. The valve chamber includes an inner valve chamber and an outer valve chamber. The inner valve chamber is connected to the bottom outlet of the pneumatic double-layer ash discharge valve. The drive component is installed outside the pneumatic slide gate valve, and its output end is fixedly connected to the valve plate disposed in the valve chamber. It is used to drive the valve plate from the outer valve chamber to the inner valve chamber to block the bottom outlet of the pneumatic double-layer ash discharge valve, and to drive the valve plate from the inner valve chamber to the outer valve chamber to open the bottom outlet of the pneumatic double-layer ash discharge valve.

2. The ash conveying device for an electrostatic precipitator according to claim 1, characterized in that, The inner valve cavity and the outer valve cavity are separated by a first partition, and the first partition is provided with a first through hole for the valve plate to pass through. The length of the valve plate is longer than the length of the inner valve cavity.

3. The ash conveying device for an electrostatic precipitator according to claim 2, characterized in that, The inner valve cavity is provided with a first sealing part and a second sealing part. The driving member is disposed on the outer wall of the first side wall of the outer valve cavity away from the inner valve cavity. The first sealing part is disposed on the inner wall of the second side wall of the inner valve cavity away from the outer valve cavity and opposite to the first side wall. The second sealing part is disposed on the third side wall and the fourth side wall that are perpendicularly connected to the first side wall. When the valve plate is inserted into the inner valve cavity, the end of the valve plate away from the driving member is inserted into the first sealing part, and the two sides of the valve plate are inserted into the second sealing part.

4. The ash conveying device for an electrostatic precipitator according to claim 3, characterized in that, The first sealing part includes a first sealing plate and a second sealing plate, which are disposed opposite each other, forming a first sealing groove between them. The thickness of the first sealing groove is adapted to the thickness of the valve plate. The second sealing part includes a third sealing plate and a fourth sealing plate, which are arranged opposite each other and form a second sealing groove between them. The thickness of the second sealing groove is adapted to the thickness of the valve plate.

5. The ash conveying device for an electrostatic precipitator according to claim 4, characterized in that, The outer valve cavity is also provided with a first guide portion, which is disposed on the fifth and sixth side walls that are perpendicularly connected to the first side wall. The driving member drives the valve plate to slide within the first guide portion.

6. The ash conveying device for an electrostatic precipitator according to claim 5, characterized in that, The first guide portion includes a first guide plate and a second guide plate, which are arranged opposite each other vertically, forming a first guide groove between them. The thickness of the first guide groove is adapted to the thickness of the valve plate.

7. The ash conveying device for an electrostatic precipitator according to claim 6, characterized in that, Multiple ash discharge grooves are provided at intervals on the second sealing plate, the fourth sealing plate, and the second guide plate.

8. The ash conveying device for an electrostatic precipitator according to claim 7, characterized in that, The first sealing plate, the second sealing plate, the third sealing plate, the fourth sealing plate, the first guide plate, and the second guide plate are all made of polytetrafluoroethylene.

9. The ash conveying device for an electrostatic precipitator according to claim 8, characterized in that, The valve plate is made of steel lined with polytetrafluoroethylene, and the end of the valve plate away from the drive component has a chamfered structure.

10. The ash conveying device for an electrostatic precipitator according to claim 1, characterized in that, It also includes a manual slide gate valve, which is installed on the ash discharge pipe and located above the pneumatic double-layer ash discharge valve. The pneumatic double-layer ash discharge valve includes an upper valve and a lower valve. The upper valve includes an upper valve chamber and an upper mushroom head. The lower valve includes a lower valve chamber and a lower mushroom head. The inlet of the upper valve chamber is connected to the upper part of the ash discharge pipe. The upper mushroom head is located between the inlet of the upper valve chamber and the upper part of the ash discharge pipe. The outlet of the lower valve chamber is connected to the lower part of the ash discharge pipe. The lower mushroom head is located between the inlet of the lower valve chamber and the outlet of the upper valve chamber.

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