Closed-loop dust discharging device of dust collector and dust discharging method thereof

Abstract

This invention discloses a closed-loop dust removal device and method for a dust collector, relating to the technical field of dust removal devices. It includes: a system dust collector, with its inlet connected to the outlet of the dust collector to be removed; a buffer tank, with its inlet connected to the outlet of the system dust collector; a first air storage tank, with its inlet connected to the outlet of the buffer tank, and an air compressor installed on the storage pipeline; a second air storage tank, with its inlet connected to the outlet of the first air storage tank, and its outlet connected to the dust collector to be removed; a humidification device, connected to the outlet of the system dust collector, containing a stirring device and a conveying device, and a dust outlet on one side; and a replenishment tank, connected to the inlet of the humidification device. This invention uses a closed-loop system to enclose the dust in the dust collector, eliminating the need for oxidation time and preventing pollution of the workshop.

Description

Technical Field

[0001] This invention relates to the field of dust removal device technology, and in particular to a closed-loop dust removal device and method for a dust collector. Background Technology

[0002] The crystal pulling process in single / polycrystalline furnaces generates a large amount of SiO dust that is spontaneously combustible upon contact with air. A simple harmonic vacuum dust collector filters this SiO dust and stores it in an ash hopper. Once the dust in the ash hopper reaches a certain level, ash discharge is required. Currently, ash discharge from dust collectors generally uses ash hopper vibration and a rotary valve at the ash removal port. For small dust collectors, due to their smaller size, manual scooping, shoveling, and sweeping are typically used to achieve ash discharge.

[0003] Current simple harmonic vacuum dust collectors, such as the "simple harmonic dust collector for monocrystalline silicon and polycrystalline silicon" disclosed in patent number CN105251281A, describe a manual dust removal method. Given that SiO dust can spontaneously combust or even explode when exposed to air, the SiO dust must be slowly oxidized into SiO2 dust before manual dust removal. However, this process consumes a lot of time, and the significant time loss has severely restricted production capacity growth.

[0004] The existing dust removal process involves: a slow oxidation process of 90-120 minutes before cleaning; manual removal requires wearing protective clothing, goggles, and a mask; and the use of scrapers and brooms to collect the dust into bags. This process generates dust, causing secondary pollution to the workshop environment and increasing the burden on subsequent workshop cleaning and equipment maintenance.

[0005] Therefore, there is an urgent need in the market for a closed-loop dust removal device and its dust removal method to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide a closed-loop dust removal device and method for a dust collector, which solves the technical problems existing in the prior art. It eliminates the need to wait for dust oxidation for a long time and is a fully sealed process that will not cause any pollution to the workshop.

[0007] To achieve the above objectives, the present invention provides the following solution:

[0008] This invention discloses a closed-loop ash removal device for a dust collector, comprising:

[0009] The dust collector system has its inlet connected to the outlet of the dust collector to be discharged via an outlet pipe.

[0010] A buffer tank, the air inlet of which is connected to the air outlet of the dust collector of the system through an air extraction pipeline, and a vacuum pump is provided on the air extraction pipeline;

[0011] The first air storage tank has its inlet connected to the outlet of the buffer tank via an air storage pipeline, and an air compressor is installed on the air storage pipeline.

[0012] The second gas storage tank has its inlet connected to the outlet of the first gas storage tank via a gas storage connection pipeline, and its outlet connected to the dust collector to be discharged via a purging pipeline.

[0013] A humidification device is provided, which is connected to the dust outlet of the dust collector in the system via a humidification pipeline. The humidification device is equipped with a stirring device and a conveying device. A dust outlet is provided on one side of the humidification device, which is used to connect one end of the sludge discharge pipeline.

[0014] A replenishment tank is connected to the inlet of the humidification device via a replenishment pipeline.

[0015] Preferably, the buffer tank and the first gas storage tank are also connected by a buffer gas replenishment pipeline.

[0016] Preferably, the second gas storage tank is connected to the back-flushing port of the dust collector in the system via a back-flushing pipeline.

[0017] Preferably, it also includes a gas replenishment tank, which is connected to the first gas storage tank, and the gas replenishment tank contains rare gas.

[0018] Preferably, both the buffer tank and the second gas storage tank are equipped with a temperature transmitter and a pressure transmitter;

[0019] Both the dust collector and the first gas storage tank in the system are equipped with pressure transmitters.

[0020] Preferably, each of the ash discharge pipeline, the air extraction pipeline, the air storage pipeline, the air storage connection pipeline, the purging pipeline, the humidification pipeline, the sludge discharge pipeline, and the liquid replenishment pipeline is equipped with an electrically controlled valve.

[0021] Preferably, the stirring device includes a stirring motor, the output shaft of which is connected to a stirring shaft, and the stirring shaft is provided with a plurality of blades;

[0022] The dust outlet is a conical structure, and the conveying device is provided at the dust outlet. The conveying device is a conveying auger.

[0023] Preferably, the system dust collector, the vacuum pump, the buffer tank, the first air storage tank, the second air storage tank, and the humidification device are all mounted on a transport trolley.

[0024] Preferably, the system dust collector is a filter dust collector, the vacuum pump is a rotary vane vacuum pump, and the air compressor is a screw air compressor.

[0025] The present invention also discloses a method for ash removal based on the closed-loop ash removal device of the above-mentioned dust collector, including preparation work, first purging operation, second purging operation and subsequent work;

[0026] Preparations include:

[0027] Step 1: Connect the entire device to the dust collector to be discharged.

[0028] Step 2: Turn on the vacuum pump to reduce the internal air pressure of the system dust collector. The gas is discharged into the buffer tank. After the pressure in the buffer tank reaches the expected pressure, the air compressor starts and discharges the gas into the first air storage tank.

[0029] Step 3: When the pressure inside the buffer tank is insufficient to the set pressure, the first air tank replenishes the pressure to the buffer tank through the buffer air replenishment pipeline.

[0030] The first purging operation includes:

[0031] Step 1: The second air storage tank is purged through the purging pipeline into the ash bin of the dust collector to be discharged.

[0032] Step 2: Start the vacuum pump. Once the buffer tank reaches the expected pressure, start the air compressor to exhaust air into the first air tank to ensure that the air pressure of each device is normal.

[0033] Step 3: A few seconds after the first purging operation starts, start the back-blowing pipeline between the second air tank and the system dust collector to back-blow the filter element of the system dust collector to remove dust.

[0034] Step 4: Start the humidifier and add liquid to the dust inside the humidifier through the liquid replenishment pipeline. The stirring device in the humidifier can stir for a few seconds before stopping.

[0035] The second purging operation includes:

[0036] Step 1: After the first purging operation is completed, after a few seconds, close the purging pipeline and open the gas storage connection pipeline. Close the second gas storage tank when the pressure reaches the expected pressure.

[0037] Step 2: Open the purging line and start the vacuum pump and air compressor to ensure air pressure in all devices;

[0038] A few seconds after the second purging operation is started, the back-blowing pipeline between the second air tank and the system dust collector is started to back-blow the filter element of the system dust collector to remove dust.

[0039] Start the humidifier and add liquid to the dust inside the humidifier through the liquid replenishment pipeline. The stirring device in the humidifier can stir for a few seconds before stopping.

[0040] Step 3: After the gas is discharged into the first gas storage tank, the gas storage connection pipeline is opened when the first gas storage tank reaches a pressure 0.8 MPa higher than atmospheric pressure. The pipeline is closed again when the pressure in the first gas storage tank drops to 0.4 MPa higher than atmospheric pressure. After the second gas storage tank has been purged and released, the gas storage connection pipeline is opened again when the first gas storage tank is 0.8 MPa higher than atmospheric pressure, and the next purging operation is scheduled.

[0041] Follow-up work includes:

[0042] Step 1: When the gas storage connection pipeline is opened, if the pressure of the first gas storage tank and the second gas outlet pipe is insufficient, gas is replenished to the first gas storage tank through the gas storage replenishment pipeline until the expected pressure is met.

[0043] Step 2: After the purging is completed, monitor the dust collector, humidifier and buffer tank of the monitoring system, and ensure that their pressure is 200-400 Pa higher than atmospheric pressure to prevent external gas from entering.

[0044] Step 3: After the purging is completed, start the conveying device of the humidification unit to carry out the sludge removal operation.

[0045] The present invention achieves the following technical effects compared to the prior art:

[0046] This invention utilizes a second air storage tank to blow dust from the dust collector to the system dust collector, where the system dust collector removes the dust. The filtered dust is then agitated by a humidifying device to form a sludge-like structure before being discharged. Throughout the entire process, the dust is handled in a sealed environment, preventing any potential explosion due to contact with the outside world. Furthermore, neither the processing nor the final sludge removal process causes any pollution to the workshop.

[0047] In addition, the entire system can be fully automated, thereby reducing the labor intensity of staff and reducing labor costs for enterprises. Attached Figure Description

[0048] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0049] Figure 1 This is a pipeline connection diagram of the closed-loop ash discharge device of the dust collector in Example 1;

[0050] Figure 2 This is a front view of the closed-loop ash removal device of the dust collector in Embodiment 1;

[0051] Figure 3 This is a side view of the closed-loop ash removal device of the dust collector in Embodiment 1;

[0052] In the diagram: 1-System dust collector; 2-Vacuum pump; 3-Buffer tank; 4-Air compressor; 5-First air storage tank; 6-Second air storage tank; 7-Humidifier; 8-Liquid replenishment tank; 9-Air replenishment tank; 10-Dust collector to be discharged; 11-Ash discharge pipeline; 12-Extraction pipeline; 13-Air storage pipeline; 14-Buffer air replenishment pipeline; 15-Sludge discharge pipeline; 16-Air storage connection pipeline; 17-Backflush pipeline; 18-Air storage and replenishment pipeline; 19-Liquid replenishment pipeline; 20-Purge pipeline. Detailed Implementation

[0053] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0054] The purpose of this invention is to provide a closed-loop dust removal device and method for a dust collector, which solves the technical problems existing in the prior art. It eliminates the need to wait for dust oxidation for a long time and is a fully sealed process that will not cause any pollution to the workshop.

[0055] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0056] Example 1

[0057] like Figures 1-3 As shown, this embodiment provides a closed-loop ash removal device for a dust collector, including:

[0058] The dust collector 1 has its inlet connected to the outlet of the dust collector 10 to be discharged through a ash discharge pipe 11. The ash discharge pipe 11 is DN50, which allows the dust in the dust collector 10 to enter the dust collector 1 through the ash discharge pipe 11. The dust collector 10 to be discharged includes, but is not limited to, a monocrystalline silicon or polycrystalline silicon harmonic dust collector mentioned in the background art, or other dust collectors that need to discharge ash.

[0059] The air inlet of the air inlet of the air inlet of the air inlet is connected to the air outlet of the dust collector 1 of the system through the air extraction pipe 12. The air extraction pipe 12 is equipped with a vacuum pump 2. The vacuum pump 2 can draw the gas in the dust collector 1 of the system into the air inlet of the air inlet, so that the dust collector 1 of the system is in a low-pressure environment.

[0060] The first gas storage tank 5 has its inlet connected to the outlet of the buffer tank 3 via the gas storage pipeline 13. An air compressor 4 is installed on the gas storage pipeline 13, which can be used to draw the gas in the buffer tank 3 into the first gas storage tank 5.

[0061] The second gas storage tank 6 has its inlet connected to the outlet of the first gas storage tank 5 via a gas storage connection pipe 16. The gas in the first gas storage tank 5 can be transported to the second gas storage tank 6. The outlet of the second gas storage tank 6 is connected to the dust collector 10 to be discharged via a purging pipe 20. The gas in the second gas storage tank 6 can be transported to the dust collector 10 to be discharged for purging. The purging pipe 20 is a 4-point pipe.

[0062] Humidification device 7 is connected to the dust outlet of dust collector 1 in the system through humidification pipeline. Humidification device 7 is equipped with a stirring device and a conveying device. The stirring device can mix dust and liquid (water is used in this embodiment) and the conveying device is used to transport the mixed mud-like mixture out. A dust outlet is provided on one side of humidification device 7. The dust outlet is used to connect one end of sludge discharge pipeline 15. The conveying device discharges the mixed mud through the dust outlet and sludge discharge pipeline 15.

[0063] The replenishment tank 8 is connected to the inlet of the humidification device 7 via the replenishment pipe 19. The replenishment tank 8 provides the humidification device 7 with liquid, such as water, mixed with dust through the replenishment pipe 19.

[0064] When the dust collector 10 needs cleaning, the purging pipeline 20 is opened, allowing high-pressure gas from the second air tank 6 to be blown into the dust collector 10. Simultaneously, the vacuum pump 2 and air compressor 4 are turned on. Under the low-pressure environment of the system dust collector 1, the dust in the dust collector 10 can be better drawn into the system dust collector 1, where it is filtered. The filtered gas then flows through the buffer tank 3, the first air tank 5, and then into the second storage tank, awaiting the next purging. The dust filtered from the system dust collector 1 flows through the humidification pipeline into the humidification device 7, where the stirring device mixes the dust with water from the replenishment tank 8, creating a mud-like mixture (also called mud). The reason for mixing dust with water is that the water encapsulates the dust, effectively preventing it from exploding upon contact with air. Furthermore, the combination of water and dust effectively reduces the overall volume of the dust, further minimizing its contact area with air and preventing explosion. Finally, the stirred, muddy mixture is conveyed out using the conveying device in humidification unit 7.

[0065] In this embodiment, the buffer tank 3 and the first gas storage tank 5 are also connected via a buffer replenishment pipeline 14. When the pressure inside the buffer tank 3 is low (less than atmospheric pressure), the gas in the first gas storage tank 5 needs to be transported to the buffer tank through the buffer replenishment pipeline 14 until the gas pressure inside the buffer tank 3 is 10 kPa higher than atmospheric pressure. The reason for pressurizing the buffer tank 3 to increase its internal pressure is that a higher pressure buffer tank is more conducive to the operation of the air compressor 4. If the gas pressure inside the buffer tank 3 is low or if the buffer tank 3 is not installed, the service life of the air compressor 4 will be seriously affected.

[0066] In this embodiment, the second air tank 6 is connected to the backflush port of the system dust collector 1 via the backflush pipe 17. When the filter element in the system dust collector 1 is prone to clogging after prolonged use, the gas in the second air tank 6 can be transported to the system dust collector 1 through the backflush pipe 17 to blow away the dust clogging the filter element in the system dust collector 1. The blown-away dust will re-enter the humidification device 7, and since the filter element is no longer clogged with dust, its filtration efficiency will also improve.

[0067] In this embodiment, a gas replenishment tank 9 is also included. The gas replenishment tank 9 is connected to the first gas storage tank 5 through a gas storage and replenishment pipeline 18. The gas replenishment tank 9 contains rare gases, including but not limited to nitrogen.

[0068] In practical use, the replenishing gas tank 9 replenishes the first gas storage tank 5. The gas in the first gas storage tank 5 then flows into other devices in the closed-loop system to maintain stable gas pressure in each device. Furthermore, the reason for using inert gas is to avoid reactions with dust that could lead to an explosion.

[0069] In this embodiment, both the buffer tank 3 and the second gas storage tank 6 are equipped with temperature transmitters and pressure transmitters. The temperature transmitters can be used to monitor the temperature inside the buffer tank 3 and the second gas storage tank 6 in real time, while the pressure transmitters can be used to monitor the pressure inside the buffer tank 3 and the second gas storage tank 6 in real time.

[0070] Similarly, both the system dust collector 1 and the first air storage tank 5 are equipped with pressure transmitters, which can monitor the pressure inside the system dust collector 1 and the first air storage tank 5 in real time.

[0071] In addition, a controller can be set up, which can be a PLC controller, a microcontroller, an industrial computer or a computer, etc. The vacuum pump 2, air compressor 4, temperature transmitter and pressure transmitter mentioned above are all electrically connected to the controller to realize remote monitoring by the staff.

[0072] In addition, a flow transmitter is installed on the replenishment line 19, which can be used to monitor the amount of water delivered.

[0073] In this embodiment, electrically controlled valves are installed on the ash discharge pipe 11, the air extraction pipe 12, the air storage pipe 13, the air storage connection pipe 16, the purging pipe 20, the humidification pipe, the sludge discharge pipe 15, the liquid replenishment pipe 19, the buffer air replenishment pipe 14, the air storage air replenishment pipe 18, and the backflushing pipe 17. This means that each pipe in this embodiment is equipped with an electrically controlled valve, and the valve is electrically connected to the controller to facilitate remote control of the opening or closing of each pipe by the operator.

[0074] In this embodiment, as Figure 3 As shown, the humidification device 7 is installed below the dust collector 1 of the system. The stirring device in the humidification device 7 includes a stirring motor. The output shaft of the stirring motor is connected to a stirring shaft, which is equipped with several blades. The stirring motor can drive the stirring shaft to rotate, and the multiple blades are used to fully stir the water and dust to form a mud-like mixture.

[0075] The dust outlet is a conical structure and is horizontally positioned. Figure 3The diameter gradually increases from left to right. A conveying device is installed at the dust outlet, which is a conveying auger connected to one end of a motor. The auger motor drives the conveying auger to rotate, thereby conveying the mud-like mixture inside the humidifying device 7 out. The conical dust outlet is designed to gradually reduce the gap between the conveying auger and the dust outlet, further compressing the volume of the mud-like mixture and further reducing the risk of dust explosion.

[0076] In this embodiment, the system dust collector 1, vacuum pump 2, buffer tank 3, first air storage tank 5, second air storage tank 6, humidification device 7, and make-up air tank 9 are all mounted on a transport trolley. The transport trolley can move the entire system to the location of the dust collector 10 that needs to be ash removed, facilitating its movement.

[0077] As for the specific transport cart, either a common handcart or an electric cart can be used; no further restrictions are placed here.

[0078] In this embodiment, the system dust collector 1 is a conventional filter dust collector with a filter element inside. The vacuum pump 2 is a rotary vane vacuum pump 2. The air compressor 4 is a screw air compressor. Of course, those skilled in the art can also use other types of system dust collector 1, vacuum pump 2, and air compressor 4, and are not limited to this one embodiment.

[0079] Example 2

[0080] This embodiment provides a method for ash removal based on the closed-loop ash removal device of the dust collector in Embodiment 1, including preparation, first purging operation, second purging operation and subsequent work.

[0081] The preparatory work includes:

[0082] Step 1: Connect the entire device to the dust collector 10 to be discharged. Specifically, push the entire device to the side of the dust collector 10 using a transport trolley, connect one end of the ash discharge pipe 11 to the dust outlet of the dust collector 10, and connect one end of the blowing pipe 20 to the air inlet of the dust collector 10. After the pipes are connected, close all the electric control valves so that the pipes cannot flow normally.

[0083] Step two: Turn on vacuum pump 2 to reduce the internal air pressure of the system dust collector 1, maintaining it at around 1000Pa. The gas inside the system dust collector 1 is discharged into the buffer tank 3. The pressure transmitter inside the buffer tank 3 monitors the internal air pressure in real time. Once the pressure in the buffer tank 3 reaches the expected pressure (10kPa higher than atmospheric pressure), the air compressor 4 starts, discharging the gas in the buffer tank 3 into the first air storage tank 5.

[0084] Step 3: When the pressure inside the buffer tank 3 is insufficient to the set pressure (less than atmospheric pressure), the electric control valve on the buffer gas replenishment pipeline 14 is activated, and the gas in the first gas storage tank 5 is pressurized to the buffer tank 3 through the buffer gas replenishment pipeline until the pressure in the buffer tank 3 reaches 10 kPa more than atmospheric pressure.

[0085] The first purging operation includes:

[0086] Step 1: Open the electrically controlled valve on the purge pipeline 20, and the second air tank 6 will purge the ash bin of the dust collector 10 to be discharged through the purge pipeline 20.

[0087] Step 2: Start vacuum pump 2. When buffer tank 3 reaches the expected pressure (10 kPa more than atmospheric pressure), start air compressor 4 to exhaust air into first air storage tank 5 to ensure that the air pressure of each device is normal.

[0088] Step 3: After the first purging operation starts for a few seconds (2s), start the back-blowing pipeline 17 between the second air tank 6 and the system dust collector 1 (open the electric control valve on the back-blowing pipeline 17) to back-blow the filter element of the system dust collector 1 for dust removal.

[0089] Step 4: Two seconds after the first purging operation begins, start the humidification device 7, open the electronically controlled valve on the liquid replenishment line 19, and add liquid to the dust in the humidification device 7 through the liquid replenishment line 19. The stirring device in the humidification device 7 can stir for a few seconds and then stop.

[0090] The second purging operation includes:

[0091] Step 1: After the first purging operation is completed, after a delay of a few seconds, close the electric control valve on the purging pipeline 20 and open the electric control valve on the gas storage connection pipeline 16. Close the second gas storage tank 6 when the pressure reaches the expected pressure (0.4 MPa more than atmospheric pressure).

[0092] Step 2: Open the electrically controlled valve on the purge line 20, and start the vacuum pump 2 and air compressor 4 to ensure the air pressure of each device;

[0093] A few seconds after the second purging operation is started, the back-blowing pipeline 17 between the second air storage tank 6 and the system dust collector 1 is started to back-blow the filter element of the system dust collector 1 to remove dust.

[0094] Start the humidifier 7 and add liquid to the dust inside the humidifier 7 through the liquid replenishment pipeline 19. The stirring device in the humidifier 7 can stir for a few seconds and then stop the machine.

[0095] Step 3: After the gas is discharged into the first gas storage tank 5, the gas storage connection pipeline 16 is opened when the first gas storage tank 5 reaches a pressure 0.8 MPa higher than atmospheric pressure. The pipeline is closed again when the pressure of the first gas storage tank 5 drops to 0.4 MPa higher than atmospheric pressure. After the second gas storage tank 6 has been purged and released, the gas storage connection pipeline 16 is opened again when the first gas storage tank 5 is accumulating energy to a pressure 0.8 MPa higher than atmospheric pressure, and the next purging operation is awaited.

[0096] Follow-up work includes:

[0097] Step 1: When the gas storage connection pipeline 16 (electric control valve) is opened, if the pressure of the first gas storage tank 5 and the second gas outlet pipe is insufficient (less than 0.4 MPa above atmospheric pressure), gas is replenished to the first gas storage tank 5 through the gas storage replenishment pipeline until the expected pressure (0.4 MPa above atmospheric pressure) is met.

[0098] Step two: After the purging is completed, monitor the dust collector 1, humidifier 7 and buffer tank 3 of the monitoring system and make their pressure 200-400 Pa higher than atmospheric pressure, so that they are in an atmospheric pressure environment that is slightly higher than atmospheric pressure, thus preventing external gas from entering.

[0099] Step 3: After the purging is completed, start the conveying device of the humidification device 7 to perform the mud discharge operation and discharge the mud-like mixture in the humidification device 7.

[0100] This specification uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A closed-loop ash removal device for a dust collector, characterized in that, include: The dust collector system has its inlet connected to the outlet of the dust collector to be discharged via an outlet pipe. A buffer tank, the air inlet of which is connected to the air outlet of the dust collector of the system through an air extraction pipeline, and a vacuum pump is provided on the air extraction pipeline; The first air storage tank has its inlet connected to the outlet of the buffer tank via an air storage pipeline, and an air compressor is installed on the air storage pipeline. The second gas storage tank has its inlet connected to the outlet of the first gas storage tank via a gas storage connection pipeline, and its outlet connected to the dust collector to be discharged via a purging pipeline. A humidification device is provided, which is connected to the dust outlet of the dust collector in the system through a humidification pipeline. The humidification device is equipped with a stirring device and a conveying device. A dust outlet is provided on one side of the humidification device, which is used to connect one end of the sludge discharge pipeline. A replenishment tank is connected to the inlet of the humidification device via a replenishment pipeline.

2. The closed loop dust unloading device of a dust collector according to claim 1, characterized in that: The buffer tank and the first gas storage tank are also connected by a buffer gas replenishment pipeline.

3. The closed-loop ash discharge device for the dust collector according to claim 1, characterized in that: The second gas storage tank is connected to the back-flushing port of the dust collector in the system via a back-flushing pipeline.

4. The closed-loop ash discharge device for the dust collector according to claim 1, characterized in that: It also includes a gas replenishment tank, which is connected to the first gas storage tank, and the gas replenishment tank contains rare gas.

5. The closed-loop ash discharge device for the dust collector according to claim 1, characterized in that: Both the buffer tank and the second gas storage tank are equipped with temperature transmitters and pressure transmitters; Both the dust collector and the first gas storage tank in the system are equipped with pressure transmitters.

6. The closed-loop ash discharge device for the dust collector according to claim 1, characterized in that: The ash discharge pipeline, the air extraction pipeline, the air storage pipeline, the air storage connection pipeline, the purging pipeline, the humidification pipeline, the sludge discharge pipeline, and the liquid replenishment pipeline are all equipped with electrically controlled valves.

7. The closed-loop ash discharge device for the dust collector according to claim 1, characterized in that: The stirring device includes a stirring motor, and a stirring shaft is connected to the output shaft of the stirring motor. The stirring shaft is provided with a plurality of blades. The dust outlet is a conical structure, and the conveying device is provided at the dust outlet. The conveying device is a conveying auger.

8. The closed-loop ash discharge device for the dust collector according to claim 1, characterized in that: The system dust collector, vacuum pump, buffer tank, first air storage tank, second air storage tank, and humidification device are all mounted on a transport trolley.

9. The closed-loop ash discharge device for the dust collector according to claim 1, characterized in that: The system dust collector is a filter dust collector, the vacuum pump is a rotary vane vacuum pump, and the air compressor is a screw air compressor.

10. A method for discharging ash from a closed-loop ash discharge device of a dust collector according to any one of claims 1-9, characterized in that: This includes preparation, the first purging operation, the second purging operation, and follow-up work; Preparations include: Step 1: Connect the entire device to the dust collector to be discharged. Step 2: Turn on the vacuum pump to reduce the internal air pressure of the system dust collector. The gas is discharged into the buffer tank. After the pressure in the buffer tank reaches the expected pressure, the air compressor starts and discharges the gas into the first air storage tank. Step 3: When the pressure inside the buffer tank is insufficient to the set pressure, the first air tank replenishes the pressure to the buffer tank through the buffer air replenishment pipeline. The first purging operation includes: Step 1: The second air storage tank is purged through the purging pipeline into the ash bin of the dust collector to be discharged. Step 2: Start the vacuum pump. Once the buffer tank reaches the expected pressure, start the air compressor to exhaust air into the first air tank to ensure that the air pressure of each device is normal. Step 3: A few seconds after the first purging operation starts, start the back-blowing pipeline between the second air tank and the system dust collector to back-blow the filter element of the system dust collector to remove dust. Step 4: Start the humidifier and add liquid to the dust inside the humidifier through the liquid replenishment pipeline. The stirring device in the humidifier will stir for a few seconds and then stop. The second purging operation includes: Step 1: After the first purging operation is completed, after a few seconds, close the purging pipeline and open the gas storage connection pipeline. Close the second gas storage tank when the pressure reaches the expected pressure. Step 2: Open the purging line and start the vacuum pump and air compressor to ensure air pressure in all devices; A few seconds after the second purging operation is started, the back-blowing pipeline between the second air tank and the system dust collector is started to back-blow the filter element of the system dust collector to remove dust. Start the humidifier and add liquid to the dust inside the humidifier through the liquid replenishment pipeline. The stirring device in the humidifier will stir for a few seconds and then stop. Step 3: After the gas is discharged into the first gas storage tank, the gas storage connection pipeline is opened when the first gas storage tank reaches a pressure 0.8 MPa higher than atmospheric pressure. The pipeline is closed when the pressure in the first gas storage tank drops to 0.4 MPa higher than atmospheric pressure. After the second gas storage tank has been purged and the pressure has been released, the gas storage connection pipeline is opened again when the first gas storage tank has accumulated energy to 0.8 MPa higher than atmospheric pressure, and the next purging operation is awaited. Follow-up work includes: Step 1: When the gas storage connection pipeline is opened, if the pressure of the first gas storage tank and the second gas outlet pipe is insufficient, gas is replenished to the first gas storage tank through the gas storage replenishment pipeline until the expected pressure is met. Step 2: After the purging is completed, monitor the dust collector, humidifier and buffer tank of the monitoring system, and ensure that their pressure is 200-400 Pa higher than atmospheric pressure to prevent external gas from entering. Step 3: After the purging is completed, start the conveying device of the humidification unit to carry out the sludge removal operation.

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