Automatic sampling device for fine ash of fly ash separation system

Abstract

The utility model discloses a fly ash sorting system fine ash automatic sampling device, including the raw ash storehouse, the coarse ash storehouse and the fine ash storehouse, and the raw ash storehouse stores fly ash, and the top of coarse ash storehouse is provided with two vortex classificators of up and down, and the raw ash storehouse is communicated to the material inlet of upper vortex classificator through pipeline, and the coarse ash outlet of upper vortex classificator is communicated to the material inlet of lower vortex classificator, and the coarse ash outlet of lower vortex classificator is communicated to coarse ash storehouse through pipeline, and the fine ash outlet of two vortex classificators is communicated to the same pipeline, and the pipeline is fixed and communicated with the material inlet of cyclone separator, and the discharge port of cyclone separator bottom is communicated with the material inlet of fine ash sieve moving bin through pipeline, and the fine ash outlet of fine ash sieve moving bin is communicated to fine ash storehouse through pipeline. The utility model carries out secondary sorting processing to the coarse ash and fine ash obtained by sorting on the basis of completing the preliminary sorting of fly ash, thereby improves the grading precision of fly ash, and makes the sampling result more accurate.

Description

Technical Field

[0001] This utility model relates to the field of fly ash sorting, specifically to an automatic fine ash sampling device for fly ash sorting systems. Background Technology

[0002] Fly ash is the particulate matter and bottom ash collected from the flue gas of coal-fired power plant boilers by dust collectors. The rapid development of the power industry has led to a dramatic increase in fly ash emissions, with the total amount of fly ash emitted by coal-fired power plants increasing year by year. Therefore, fly ash treatment has become an urgent problem to be solved in this field. However, open-air storage of fly ash easily causes dust pollution and the spread of toxic chemicals, and its discharge into water systems can cause siltation and harm to humans and other organisms. Therefore, fly ash usually needs to be sorted and processed so that it can be used in concrete admixtures, cement raw materials, environmentally friendly adsorbent materials, and other fields.

[0003] In the process of fly ash treatment in power plants, it is necessary to sample and analyze the sorted fly ash to ensure that its quality meets relevant standards. Traditional fine ash sampling is mostly done manually on-site. The top of the fly ash silo can be 20-30 meters high, requiring personnel to reach the top for sampling, resulting in high labor intensity and certain safety hazards. Furthermore, traditional fly ash sorting devices typically use gas transport to send the fly ash into an eddy current classifier or air classifier for particle size classification. However, due to the small size and large quantity of fly ash particles, particles of different sizes easily become entangled and aggregate during the sorting process, leading to unsatisfactory classification results. This further results in a certain amount of coarse ash mixed in with the sampled fine ash, causing a large particle size deviation in the sampled fine ash. Consequently, the test results and performance of the sampled fine ash differ significantly from those of fine ash with smaller particle size deviations, thus affecting its expected performance in various application fields. Utility Model Content

[0004] The purpose of this invention is to provide an automatic fine ash sampling device for a fly ash sorting system to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an automatic fine ash sampling device for a fly ash sorting system, comprising a raw ash silo, a coarse ash silo, and a fine ash silo. The raw ash silo contains fly ash. Above the coarse ash silo are two vortex classifiers, one above the other. The raw ash silo is connected to the inlet of the upper vortex classifier via a pipe. The coarse ash outlet of the upper vortex classifier is connected to the inlet of the lower vortex classifier. The coarse ash outlet of the lower vortex classifier is connected to the coarse ash silo via a pipe. The fine ash outlets of the two vortex classifiers are connected to the same pipe, which is fixed and connected to the inlet of a cyclone separator. The outlet at the bottom of the cyclone separator is connected to the inlet of the fine ash screening chamber via a pipe. The fine ash outlet of the fine ash screening chamber is connected to the fine ash silo via a pipe. The fine ash sieve includes a coarse ash zone, a fine ash zone, and a square screen. The discharge port at the bottom of the cyclone separator is connected to the inlet of the coarse ash zone through a pipe. The lower end of the coarse ash zone is fixedly connected to the square screen, and the lower end of the square screen is fixedly connected to the fine ash zone. The fine ash outlet of the fine ash zone is connected to the fine ash silo through a pipe. A vibrator is fixedly connected to the square screen. The fine ash discharged from the fine ash outlet in the fine ash zone is collected into the ash sample collection container by the sampling component above the fine ash silo.

[0006] The sampling assembly includes a sampling pipe. An airlock discharge valve is installed on the pipe between the fine ash zone and the fine ash silo. The pipe at the lower end of the airlock discharge valve has an inclined section. One end of the inclined section of the pipe is connected to the sampling pipe. The other end of the sampling pipe is connected to the inlet at the top of the material tank. An air inlet valve is installed on one side of the material tank. A feed valve is installed at the connection between the pipe and the sampling pipe. The sampling pipe has a feed valve installed above the material tank. The middle of another pipe is fixed below the material tank and connected to it. One end of this pipe is connected to the ash sample collection container, and the other end of this pipe is connected to the pipe at the top of the fine ash silo.

[0007] A first discharge valve is installed on the pipeline between the material tank and the ash sample collection container, and a second discharge valve is installed on the pipeline between the material tank and the fine ash silo.

[0008] The raw ash silo is fixed above and connected to the feed inlet, and the raw ash valve and feeder are installed in sequence below the raw ash silo.

[0009] The lower end of the raw ash silo is connected to the inlet of the air-ash mixer via a pipe, and the outlet of the air-ash mixer is connected to the inlet of the upper vortex classifier via a pipe.

[0010] The inlet of the gas-ash mixer is fixedly connected to the outlet of the manifold and is in communication with it. The inlet of the lower vortex classifier is fixedly connected to the other outlet of the manifold and is in communication with it. The air inlet of the manifold is fixedly connected to the main fan.

[0011] The air outlet of the cyclone separator is fixedly connected to the main fan via a pipe.

[0012] One end of the coarse ash zone is fixedly connected to the fine ash blower, and the other end of the coarse ash zone is connected to one end of a pipe. The other end of the pipe is fixed and connected to the pipe at the feed inlet of the upper vortex classifier.

[0013] Another airlock discharge valve is fixedly connected to the pipeline between the lower vortex classifier and the coarse ash silo.

[0014] A fine ash valve is installed on the pipeline between the cyclone separator and the fine ash screening chamber.

[0015] Compared with existing technologies, the beneficial effects of this invention are as follows: Based on the initial sorting of fly ash, this invention further performs secondary sorting on the coarse and fine ash obtained from the initial sorting, thereby effectively separating the fine ash particles mixed in with the coarse ash. Simultaneously, it can also extract the coarse ash particles mixed in with the fine ash, thus effectively reducing the phenomenon of mutual entrainment. Through this dual sorting process, the overall grading accuracy and particle consistency of fly ash are significantly improved, resulting in smaller particle size deviations in the sampled fine ash, and obtaining fine ash with higher precision. Sampling this high-precision fine ash ensures the accuracy of the test results. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 for Figure 1 A magnified view of a portion of point A in the middle; Figure 3 This is a schematic diagram illustrating the principle of this utility model.

[0017] In the diagram: 101, raw ash silo; 102, coarse ash silo; 103, fine ash silo; 104, feed inlet; 105, pipe; 201, main fan; 202, manifold; 301, raw ash valve; 302, feeder; 303, air-ash mixer; 401, vortex classifier; 402, airlock discharge valve; 501, cyclone separator; 502, fine ash valve; 503, fine ash screen hopper; 504, coarse ash zone; 505, fine ash zone; 506, square screen; 507, vibrator; 508, fine ash fan; 601, feed valve; 602, feed valve; 603, silo; 604, first discharge valve; 605, second discharge valve; 606, air inlet valve; 607, ash sample collection container; 608, sampling pipe. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-3To address the problem of fly ash particles being small and numerous, easily becoming entangled and agglomerated during the sorting process, leading to unsatisfactory grading results and large particle size deviations in fine ash sampling, this invention provides a technical solution: an automatic fine ash sampling device for a fly ash sorting system. This device, based on the initial sorting of fly ash, further performs secondary sorting on the coarse and fine ash particles obtained from the initial sorting. This effectively reduces the entanglement of fly ash particles of different sizes, improves the accuracy of fine ash sampling, and ensures the accuracy of test results. The device includes a raw ash silo 101, a coarse ash silo 102, and a fine ash silo 103. The raw ash silo 101 contains fly ash. To achieve secondary sorting of the coarse ash, two eddy current classifiers 401 are installed above the coarse ash silo 102. A vortex classifier is an existing device that uses airflow and centrifugal force to classify powder particles. After the gas carries the granular material into the vortex classifier, the larger particles are subjected to greater centrifugal force and are therefore thrown onto the inner wall of the vortex classifier. Then, under the action of gravity, they are discharged through the coarse powder outlet at the bottom. The smaller particles are subjected to less centrifugal force and are subjected to greater airflow drag force. Therefore, the smaller particles are discharged from the fine powder outlet on one side of the vortex classifier under the action of airflow, and the gas is also discharged from the fine powder outlet at the same time. In this embodiment, the eddy current classifier 401 adopts an existing model of eddy current classifier, and two eddy current classifiers 401 are set at the upper and lower ends. After the gas carries the fly ash into the eddy current classifier 401, the larger coarse ash particles are discharged through the coarse ash outlet at the bottom of the eddy current classifier 401, while the smaller fine ash particles are discharged from the fine ash outlet on one side of the eddy current classifier 401. At the same time, the gas is also discharged from the fine ash outlet. The original ash silo 101 is connected to the feed inlet of the upper eddy current classifier 401 through the pipe 105. The coarse ash outlet of the upper eddy current classifier 401 is connected to the feed inlet of the lower eddy current classifier 401. The coarse ash outlet of the lower eddy current classifier 401 is connected to the coarse ash silo 102 through the pipe 105.

[0020] The fine ash outlets of the two vortex classifiers 401 are connected to the same pipe 105, which is fixed and connected to the inlet of the cyclone separator 501. The cyclone separator is an existing device for separating particulate materials and gases. It typically includes a cylinder and a cone located below the cylinder. After the gas and particulate materials enter the cyclone separator, they rotate along the cylindrical inner wall of the cylinder. When the particles come into contact with the inner wall, they collide and lose kinetic energy. Under the action of gravity, they are discharged from the particle outlet at the bottom. The gas continues to descend along the cylindrical inner wall of the cylinder. When the rotating airflow descends to the bottom of the cone, due to the contraction of the cone, the airflow will turn to the central axis of the cyclone separator, forming an upward internal vortex, and finally discharged from the air outlet at the top. In this embodiment, the cyclone separator 501 adopts an existing model of cyclone separator. After the fine ash and gas discharged from the fine ash outlet of the vortex classifier 401 enter the cyclone separator 501, the fine ash is discharged from the discharge port at the bottom of the cyclone separator 501, and the gas is discharged from the air outlet at the top of the cyclone separator 501.

[0021] To achieve secondary sorting of fine ash, such as Figure 2 As shown, the discharge port at the bottom of the cyclone separator 501 is connected to the inlet of the fine ash sieve chamber 503 via pipe 105. The fine ash outlet of the fine ash sieve chamber 503 is connected to the fine ash silo 103 via pipe 105. The fine ash sieve chamber 503 includes a coarse ash zone 504, a fine ash zone 505, and a square screen 506. The discharge port at the bottom of the cyclone separator 501 is connected to the inlet of the coarse ash zone 504 via pipe 105. The lower end of the coarse ash zone 504 is fixedly connected to the square screen 506. The lower end of the square screen 506 is fixedly connected to the fine ash zone 505. The fine ash outlet of the fine ash zone 505 is connected to the fine ash silo 103 via pipe 105. The square screen 506 extends beyond the coarse ash zone 504 and the fine ash zone 505. A vibrator 507 is fixedly connected at the extended position of the square screen 506. In this embodiment, the vibrator 507 is an existing model vibrator. The vibrator, which is fixedly installed on the square screen, drives the square screen to vibrate in order to achieve screening and anti-clogging, which is also existing technology.

[0022] In order to sample the fine ash, the fine ash discharged from the fine ash outlet of the fine ash zone 505 is collected by the sampling component above the fine ash storage 103 and then sampled in the ash sample collection container 607.

[0023] The sampling assembly includes a sampling pipe 608. An airlock discharge valve 402 is installed on pipe 105 between the fine ash zone 505 and the fine ash silo 103. The airlock discharge valve is an existing device used to continuously convey particulate materials while maintaining the airtightness of the system. Its working principle is as follows: a drive unit drives a rotor with multiple blades to rotate continuously within the valve chamber. Because the rotor blades maintain a tight fit with the valve chamber, the inlet and outlet of the airlock discharge valve are continuously isolated during rotation, preventing direct air convection. Simultaneously, the particles are discharged from the outlet under the action of the impeller. In this embodiment, the airlock discharge valve 402 is an existing model. Fine ash particles from the fine ash zone 505 fall into the airlock discharge valve 402 and are discharged from its outlet. The function of the airlock discharge valve 402 is to effectively block air convection between the atmospheric pressure fine ash silo 103 and the negative pressure fine ash screening chamber 503 and cyclone separator 501. The airlock discharge valve 402 is designed to maintain the necessary negative pressure working environment inside the cyclone separator 501, ensuring that it can effectively separate gas and fine ash.

[0024] In this embodiment, the pipe 105 at the lower end of the airlock discharge valve 402 has an inclined section. The inclined section of the pipe 105 is connected to one end of the sampling pipe 608. The other end of the sampling pipe 608 is connected to the inlet at the upper end of the material tank 603. An air inlet valve 606 is installed on one side of the material tank 603. An inlet valve 601 is installed at the connection between the pipe 105 and the sampling pipe 608. An inlet valve 602 is installed on the sampling pipe 608 above the material tank 603. The lower part of the material tank 603 is fixed and connected to the middle of another pipe 105. One end of the pipe 105 is connected to the ash sample collection container 607, and the other end of the pipe 105 is connected to the pipe 105 at the upper end of the fine ash silo 103.

[0025] A first discharge valve 604 is installed on the pipe 105 between the material tank 603 and the ash sample collection container 607, and a second discharge valve 605 is installed on the pipe 105 between the material tank 603 and the fine ash silo 103.

[0026] The upper part of the original ash silo 101 is fixed and connected to the inlet 104. The original ash valve 301 and the feeder 302 are installed sequentially at the lower part of the original ash silo 101. The feeder is a conventional feeding device with a rotating impeller inside, which guides the material to be discharged evenly and continuously through the rotation of the impeller. In this embodiment, the feeder 302 adopts a conventional model of feeder, which guides the fly ash to be discharged evenly and continuously from the lower end of the original ash silo 101 through the rotation of its internal impeller (not shown in the attached figure).

[0027] The lower end of the original ash silo 101 is connected to the inlet of the gas-ash mixer 303 via pipe 105. The gas-ash mixer is an existing device that utilizes fluid dynamics principles to fully and uniformly mix gas (such as air) with particulate materials. After the gas is injected into the gas-ash mixer at a certain angle, the gas blows the particulate materials entering the gas-ash mixer, dispersing them. Subsequently, the gas and particulate materials are discharged at high speed from the outlet of the gas-ash mixer. In this embodiment, the gas-ash mixer 303 adopts an existing model of gas-ash mixer. The gas-ash mixer 303 is used to mix the gas with the fly ash entering the gas-ash mixer 303. The outlet of the gas-ash mixer 303 is connected to the inlet of the upper vortex classifier 401 via pipe 105.

[0028] The inlet of the gas-ash mixer 303 is fixedly connected to the manifold 202. The manifold is an existing pipeline with an inlet and multiple outlets, which can evenly distribute the airflow entering its interior through the inlet to different outlets, so that each outlet can obtain a continuous and stable airflow. In this embodiment, the manifold 202 has two outlets. The inlet of the gas-ash mixer 303 is fixedly connected to and communicates with one outlet of the manifold 202. The inlet of the lower vortex classifier 401 is fixedly connected to and communicates with the other outlet of the manifold 202. The inlet of the manifold 202 is fixedly connected to the main fan 201 as an air inlet.

[0029] The air outlet of the cyclone separator 501 is fixedly connected to the main fan 201 through the pipe 105.

[0030] One end of the coarse ash zone 504 is fixedly connected to the fine ash blower 508, and the other end of the coarse ash zone 504 is connected to one end of a pipe 105. The other end of the pipe 105 is fixed and connected to the pipe 105 at the feed inlet of the upper vortex classifier 401.

[0031] Another airlock discharge valve 402 is fixedly connected to the pipe 105 between the lower eddy current classifier 401 and the coarse ash silo 102. The function of setting this airlock discharge valve 402 here is: firstly, to achieve continuous and uniform discharge, stably discharging the qualified coarse ash after secondary sorting into the atmospheric pressure coarse ash silo 102; secondly, to effectively block the gas exchange between the atmospheric pressure air in the coarse ash silo 102 and the negative pressure working environment inside the lower eddy current classifier 401 during the discharge process, thereby ensuring the stability of the airflow field inside the eddy current classifier 401 and avoiding the decrease in sorting efficiency caused by the disruption of its working negative pressure.

[0032] A fine ash valve 502 is installed on the pipe 105 between the cyclone separator 501 and the fine ash screen 503.

[0033] The main blower 201, manifold 202, raw ash valve 301, feeder 302, air-ash mixer 303, vortex classifier 401, airlock discharge valve 402, cyclone separator 501, fine ash valve 502, vibrator 507, fine ash blower 508, feed valve 601, feed valve 602, first discharge valve 604, second discharge valve 605 and air inlet valve 606 are all electrically connected to a PLC controller (not shown in the figure), and the start and stop of the equipment are controlled by the PLC controller.

[0034] In this application, the main blower 201, manifold 202, feeder 302, air-ash mixer 303, vortex classifier 401, airlock discharge valve 402, cyclone separator 501, vibrator 507, fine ash blower 508, feed valve 602, first discharge valve 604, second discharge valve 605, air inlet valve 606 and PLC controller are all existing models.

[0035] When preparing to sort fly ash, the raw ash valve 301 is first opened and the feeder 302 is started via the PLC controller. The feeder 302 evenly feeds the fly ash in the raw ash silo 101 into the pipe 105. Then, the main blower 201 is turned on, and the main blower 201 drives the gas in the pipe 105 to start flowing. The fly ash in the pipe 105 is carried by the gas into the gas-ash mixer 303 and is mixed into a gas-ash mixture. The gas-ash mixture continues to move into the upper vortex classifier 401. After being processed by the upper vortex classifier 401, the coarse ash falls from the coarse ash outlet below the upper vortex classifier 401 into the lower vortex classifier 401. The fine ash and gas enter the cyclone separator 501 from the fine ash outlet of the upper vortex classifier 401. The cyclone separator 501 separates the fine ash from the gas.

[0036] Simultaneously, the main blower 201 drives the gas through the manifold 202 into the lower vortex classifier 401. The gas merges with the coarse ash falling from the coarse ash outlet of the upper vortex classifier 401. The merged gas and coarse ash then enter the feed inlet of the lower vortex classifier 401. After being processed by the lower vortex classifier 401, the fine ash mixed in with the coarse ash separated by the upper vortex classifier 401 is blown into the cyclone separator 501. The coarse ash discharged from the coarse ash outlet of the lower vortex classifier 401 enters the coarse ash silo 102 through the airlock discharge valve 402. Secondary sorting of coarse ash is achieved by setting up vortex classifiers 401 at both the upper and lower ends.

[0037] Cyclone separator 501 separates the fine ash discharged from the two vortex classifiers 401 from the gas. The separated fine ash falls onto the square screen 506 in the fine ash screening chamber 503. The gas returns to the main fan 201 from the outlet of cyclone separator 501. Vibrator 507 is turned on, causing the square screen 506 to vibrate, thus screening out the fine ash. The screened fine ash enters the fine ash zone 505. After passing through the airlock discharge valve 402, the fine ash enters the inclined section of pipe 105 and then enters the fine ash silo 103. Coarse ash impurities in the fine ash are trapped on the square screen 506 and located in the coarse ash zone 504.

[0038] Since coarse ash cannot pass through the square screen 506, and the small aperture of the square screen 506 is prone to clogging, resulting in poor sorting effect, the square screen 506 is vibrated by the vibrator 507 to improve sorting efficiency. At the same time, the fine ash valve 502 and the fine ash blower 508 alternately operate, and the fine ash blower 508 blows the coarse ash accumulated above the square screen 506 into the upper vortex classifier 401, which then enters the coarse ash silo 102. This not only improves the sorting accuracy but also avoids clogging of the square screen 506. Therefore, the fine ash valve 502 and the fine ash blower 508 alternately operate by the PLC controller. When the fine ash valve 502 is closed, the fine ash blower 508 starts, and the fine ash blower 508 drives the coarse ash above the square screen 506 back into the upper vortex classifier 401. When the fine ash valve 502 is open, the fine ash blower 508 is closed, and the fine ash discharged from the cyclone separator 501 enters the fine ash screen chamber 503 for processing. The secondary sorting of fine ash is achieved by setting up a cyclone separator 501 and a fine ash screen chamber 503.

[0039] When sampling of fine ash is required, the feed valve 601 is opened. The fine ash then passes through the airlock discharge valve 402 at the lower end of the fine ash zone 505 and enters the inclined section of pipe 105. It then passes through the feed valve 601 and enters the sampling pipe 608. At this point, the feed valve 602 is activated, controlling the fine ash to enter the hopper 603. Then, the air inlet valve 606 and the second discharge valve 605 are opened. The air inlet valve 606 introduces compressed air into the hopper 603 and blows away the accumulated ash in pipe 105, thus blowing the accumulated ash in pipe 105 into the fine ash sample. Inside the ash silo 103, the air inlet valve 606 and the second discharge valve 605 are closed. At this time, the fine ash continues to enter the silo 603 from the inlet valve 602. Then the inlet valve 602 is closed, the first discharge valve 604 is opened, and the air inlet valve 606 is opened again. The air inlet valve 606 introduces compressed air into the silo 603 and blows the fine ash into the ash sample collection container 607 through the first discharge valve 604. When a certain amount has been collected, the inlet valve 601, the pneumatic air inlet valve 606, and the first discharge valve 604 are closed to complete one sampling process.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic fine ash sampling device for a fly ash sorting system, comprising a raw ash silo (101), a coarse ash silo (102), and a fine ash silo (103), wherein the raw ash silo (101) contains fly ash, characterized in that: Two vortex classifiers (401) are installed above the coarse ash silo (102). The original ash silo (101) is connected to the inlet of the upper vortex classifier (401) through a pipe (105). The coarse ash outlet of the upper vortex classifier (401) is connected to the inlet of the lower vortex classifier (401). The coarse ash outlet of the lower vortex classifier (401) is connected to the coarse ash silo (102) through a pipe (105). The fine ash outlets of the two vortex classifiers (401) are connected to the same pipe (105). This pipe (105) is fixed and connected to the inlet of the cyclone separator (501). The outlet at the bottom of the cyclone separator (501) is connected to the inlet of the fine ash sieve chamber (503) through a pipe (105). The fine ash outlet of the fine ash sieve chamber (503) is connected to the fine ash silo (103) through a pipe (105). The fine ash sieve hopper (503) includes a coarse ash zone (504), a fine ash zone (505), and a square sieve (506). The discharge port at the bottom of the cyclone separator (501) is connected to the inlet of the coarse ash zone (504) through a pipe (105). The lower end of the coarse ash zone (504) is fixedly connected to the square sieve (506), and the lower end of the square sieve (506) is fixedly connected to the fine ash zone (505). The fine ash outlet of the fine ash zone (505) is connected to the fine ash silo (103) through a pipe (105). A vibrator (507) is fixedly connected to the square sieve (506). The fine ash discharged from the fine ash outlet of the fine ash zone (505) is collected by the sampling component above the fine ash silo (103) and sampled into the ash sample collection container (607).

2. The automatic fine ash sampling device for the fly ash sorting system according to claim 1, characterized in that: The sampling assembly includes a sampling pipe (608). An airlock discharge valve (402) is installed on the pipe (105) between the fine ash zone (505) and the fine ash silo (103). The lower end of the pipe (105) of the airlock discharge valve (402) has an inclined section. One end of the inclined section of the pipe (105) is connected to the sampling pipe (608). The other end of the sampling pipe (608) is connected to the inlet at the upper end of the material tank (603). An air inlet valve is installed on one side of the material tank (603). 606), a feed valve (601) is installed at the connection between the pipe (105) and the sampling pipe (608). The sampling pipe (608) is equipped with a feed valve (602) above the material tank (603). The material tank (603) is fixed below and connected to the middle of another pipe (105). One end of the pipe (105) is connected to the ash sample collection container (607), and the other end of the pipe (105) is connected to the pipe (105) at the top of the fine ash silo (103).

3. The automatic fine ash sampling device for the fly ash sorting system according to claim 2, characterized in that: A first discharge valve (604) is installed on the pipe (105) between the material tank (603) and the ash sample collection container (607), and a second discharge valve (605) is installed on the pipe (105) between the material tank (603) and the fine ash silo (103).

4. The automatic fine ash sampling device for the fly ash sorting system according to claim 3, characterized in that: The raw ash silo (101) is fixed above and connected to the feed inlet (104), and the raw ash valve (301) and feeder (302) are installed in sequence below the raw ash silo (101).

5. The automatic fine ash sampling device for the fly ash sorting system according to claim 4, characterized in that: The lower end of the raw ash silo (101) is connected to the inlet of the gas-ash mixer (303) via a pipe (105), and the outlet of the gas-ash mixer (303) is connected to the inlet of the upper vortex classifier (401) via a pipe (105).

6. The automatic fine ash sampling device for the fly ash sorting system according to claim 5, characterized in that: The inlet of the gas-ash mixer (303) is fixedly connected to the outlet of the manifold (202) and is in communication with it. The inlet of the lower vortex classifier (401) is fixedly connected to the other outlet of the manifold (202) and is in communication with it. The air inlet of the manifold (202) is fixedly connected to the main fan (201).

7. The automatic fine ash sampling device for the fly ash sorting system according to claim 6, characterized in that: The air outlet of the cyclone separator (501) is fixedly connected to the main fan (201) through a pipe (105).

8. The automatic fine ash sampling device for the fly ash sorting system according to claim 7, characterized in that: One end of the coarse ash zone (504) is fixedly connected to the fine ash blower (508), and the other end of the coarse ash zone (504) is connected to one end of a pipe (105). The other end of the pipe (105) is fixed and connected to the pipe (105) at the feed inlet of the upper vortex classifier (401).

9. The automatic fine ash sampling device for the fly ash sorting system according to claim 8, characterized in that: Another airlock discharge valve (402) is fixedly connected to the pipe (105) between the lower eddy classifier (401) and the coarse ash silo (102).

10. The automatic fine ash sampling device for the fly ash sorting system according to claim 9, characterized in that: A fine ash valve (502) is installed on the pipe (105) between the cyclone separator (501) and the fine ash screen chamber (503).

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