CN103215080A - Ash discharge device for high-temperature high-pressure ash particle and ash discharge method thereof - Google Patents

Abstract

The invention discloses an ash discharge device for a high-temperature high-pressure ash particle. The device comprises a pressure tank, a pressure varying tank, an ash storage bin, a cyclone separator, a U-shaped material return valve, a first pipeline, a second pipeline, a third pipeline, a fourth pipeline, and a fifth pipeline, wherein a feed port is formed on the pressure tank, a heat exchange coil pipe is arranged inside the inner cavity of the pressure tank, an air distributing plate is arranged at the lower part of the pressure tank, the cyclone separator is communicated with the pressure tank and the feed port of the U-shaped material return valve, the discharge port of the U-shaped material return valve is communicated with the pressure tank, the bottom end of the pressure tank is connected with the top end of the pressure varying tank, the bottom end of the pressure varying tank is connected with the top end of the ash storage bin, the first pipeline is provided with a multi-stage pressure reducing valve, the third pipeline is provided with a pressure varying tank vent valve, the fourth pipeline is provided with the pressure varying tank inflation valve, and the fifth pipeline is provided with the ash storage bin inflation valve. The ash discharge device can effectively reduce the temperature and pressure of the ash particle. The invention also discloses an ash discharge method utilizing the ash discharge device, and the method is easy to operate, safe and reliable.

Description

An ash discharge device and ash discharge method for high temperature and high pressure ash particles

technical field

The invention relates to an ash discharge device and ash discharge method for ash particles, in particular to an ash discharge device and ash discharge method for high temperature and high pressure ash particles. the

Background technique

In the rapid development of my country's economy, it is facing the bottleneck of energy resources and environmental constraints. In view of the characteristics of my country's rich coal and lack of oil and gas, coal gasification has become an important basis for clean and efficient conversion of coal energy. Since the current entrained bed coal gasification technology generally adopts the liquid slag discharge method, the technology is limited in the selection of coal with high ash melting point. The ash characteristics of coal types in my country are different from those of foreign countries. The average ash content is relatively high (generally around 27% to 28%), and the ash melting point is generally high. Coal with a melting point higher than 1400°C accounts for 55% of my country's annual coal production. and about 57% of the reserves. For so many coals with high ash melting point, if the flux is added, the oxygen consumption, slag discharge and slag discharge heat loss will inevitably be increased to a certain extent; and the gasification temperature should be increased (the gasification temperature is required to be above 1600°C) If the method is used, the oxygen consumption and the CO ₂ content in the gas will be increased accordingly, and the cold gas efficiency and the service life of the gasifier will be reduced. Using the existing liquid slagging entrained bed gasification technology to burn coal with high ash melting point in my country will face a series of problems such as difficulty in slagging. Therefore, it is necessary to develop a fluidized bed coal gasification technology suitable for coal with high ash melting point in my country.

Fluidized bed gasification technology has wide fuel adaptability, including various coal types, petroleum coke, biomass, etc. For coal types with high ash content and high melting point in my country, fluidized bed technology has obvious advantages. As the gasification pressure increases, the methane content in the gas increases, the calorific value of the gas increases, and the gasification efficiency increases, so the pressurized fluidized bed gasification technology is an effective method. For the coal with high ash content and high melting point, the ash discharged from the fluidized bed pressurized gasification device is large and the pressure is high and the temperature is high, so it must be cooled and pressurized before it can be discharged. In the high-temperature Winkler (HTW) gasification process developed in Germany, the fly ash from the secondary separator enters the primary ash cooler, and then enters the secondary ash cooler through three ash lockers before being discharged. The ash cooler is in the form of an air-cooled spiral, which needs to withstand high temperature and high pressure. The equipment is difficult to process and expensive. the

Contents of the invention

Technical problem: The technical problem to be solved by the present invention is to provide an ash discharge device for high-temperature and high-pressure ash particles, which can effectively reduce the temperature and pressure of ash particles. The ash discharge method of the device is easy to operate, safe and reliable.

Technical scheme: in order to solve the above technical problems, the technical scheme adopted in the present invention is:

An ash discharge device for high-temperature and high-pressure ash particles, the ash discharge device includes a pressure tank, a pressure change tank, an ash storage bin, a cyclone separator, a U-shaped return valve, a first pipeline, a second pipeline, a third pipeline, the fourth pipeline and the fifth pipeline, the upper part of the pressure tank is provided with a feed port, the inner cavity of the pressure tank is provided with a heat exchange coil, and the water inlet and outlet of the heat exchange coil are located in the pressure tank On the outside, the lower part of the pressure tank is equipped with an air distribution plate, the cyclone separator and the U-shaped return valve are located outside the pressure tank, and the cyclone separator is connected to the top of the pressure tank through a pipeline, and the bottom of the cyclone separator is connected to the U-shaped return valve. The feed port of the valve is connected, and the discharge port of the U-shaped return valve is connected with the pressure tank; the bottom end of the pressure tank is connected with the top of the pressure tank through the first feed valve and the second feed valve, and the pressure tank The bottom end is connected to the top of the ash storage bin through the first discharge valve and the second discharge valve; the top air inlet of the first pipeline is connected with the cyclone separator, and the middle part of the first pipeline is provided with a multi-stage pressure reducing valve. The lower part of the first pipeline is connected to the bottom end of the ash storage bin through the third discharge valve and the fourth discharge valve; the top end of the second pipeline communicates with the pressure tank, and the bottom end of the second pipeline communicates with the ash storage bin. One end of the third pipeline communicates with the pressure transformer tank, the other end of the third pipeline communicates with the first pipeline, and the middle part of the third pipeline communicates with the second pipeline through the intersection. Tank release valve, the variable pressure tank release valve is located between the second pipeline and the first pipeline; the second pipeline is provided with a first balance valve and a second balance valve, the first balance valve is located at the intersection and the first Between the top of the two pipelines, the second balance valve is located between the intersection and the bottom of the second pipeline; the multi-stage pressure reducing valve is located between the top of the first pipeline and the third pipeline; one end of the fourth pipeline is connected to the bottom of the second pipeline. The pressure transformer is connected, and the fourth pipeline is provided with a pressure transformer inflation valve; one end of the fifth pipeline is connected with the ash storage bin, and the fifth pipeline is provided with an ash storage bin inflation valve.

Further, the ash discharge device for high-temperature and high-pressure ash particles also includes a water jacket wrapped on the outer wall of the feed inlet, and the water jacket communicates with the water outlet of the heat exchange coil. the

The above-mentioned ash discharge method for the ash discharge device for high temperature and high pressure ash particles, the ash discharge method includes the following steps:

Step 10) Reduce the temperature of ash particles: all valves are initially closed, and the multi-stage pressure relief valve is opened when the feed starts, and the cooling medium is passed into the heat exchange coil located inside the pressure tank, and the cooling medium is supplied to the lower part of the pressure tank. Nitrogen gas is introduced into the air distribution plate, and then high-temperature and high-pressure ash particles are discharged into the pressure tank through the feed port, and the cooling medium and nitrogen gas cool the ash particles; the gas in the pressure tank flows to the first pipeline, wherein the gas contains After the ash particles are separated by the cyclone separator, the ash particles enter the separation standpipe of the cyclone separator, and then pass through the U-shaped return valve to send the separated ash particles back to the pressure tank; the outlet gas of the cyclone separator passes through the multi-stage reducing After the pressure valve is depressurized, the conveying air is discharged as ash particles in the ash storage bin, and discharged from the first pipeline;

Step 20) Discharge ash into the transformer tank: first, open the pressure tank filling valve, fill the pressure tank with nitrogen through the pressure tank filling valve, when the gas pressure in the pressure tank is close to the gas pressure of the pressure tank , close the inflation valve of the pressure transformer tank, open the first balance valve, until the pressure in the pressure tank and the pressure tank are equal; In the tank, at last, close the first balancing valve, the first feeding valve and the second feeding valve in sequence;

Step 30) Reduce the pressure of the ash particles: open the air release valve of the pressure tank until the gas pressure in the pressure tank is close to the gas pressure in the ash storage bin, then close the air release valve of the pressure tank;

Step 40) Ash discharge: First, open the second balance valve until the pressure between the pressure transformer tank and the ash storage bin is balanced, then open the second discharge valve and the first discharge valve in sequence, and the ash particles will flow from the ash under the action of gravity The pressure transformer enters the ash storage bin, then closes the first discharge valve, the second discharge valve and the second balance valve in sequence, then opens the ash storage bin inflation valve to fill the ash storage bin with gas, and then, Open the fourth discharge valve and the third discharge valve in turn, fill the ash storage bin with nitrogen gas through the ash storage bin inflation valve, and the ash particles enter the first pipe from the ash storage bin under the action of gravity and the transport of nitrogen gas. In the middle of the road, it is discharged from the ash outlet of the first pipeline.

Beneficial effects: compared with the prior art, the technical solution of the present invention has the following advantages:

1. Ash particle cooling and depressurization are carried out in stages. Firstly, the cooling process is carried out: in the pressure tank of the present invention, the ash particles are cooled. Specifically, the ash particles are cooled by the heat exchange coil installed in the pressure tank, and the loose wind introduced from the air distribution plate also has a certain cooling effect. Then carry out decompression treatment: in the pressure transformer, open the pressure relief valve of the pressure transformer until the gas pressure in the pressure transformer is close to the gas pressure in the ash storage bin. By reducing the temperature and reducing the pressure twice, the temperature and pressure reduction treatment of the ash particles is realized.

2. The high-temperature and high-pressure ash is cooled to about 400°C in the pressure tank. At this time, the requirements for the material and production process of the mechanical valve are reduced, the valve is easy to choose, and the cost is saved; at the same time, the life of the entire system is extended and the operating time is increased. safety. the

3. The cooling medium in the water jacket of the upper feed port of the pressure tank and the heat exchange coil in the pressure tank is water or steam, and the cooling medium exchanges heat with high-temperature ash particles. The cooling medium absorbs heat, and the temperature rises, and finally Enter the waste heat boiler to make full use of the waste heat in the ash particles. the

4. Set up balance valves between the pressure tank and the pressure tank, and between the pressure tank and the ash storage bin to ensure the pressure balance in the pressure tank and the ash storage bin. The ash particles fall by their own gravity, so that the ash particles The movement is smoother and the controllability is enhanced, which reduces the impact on the equipment. the

5. In the lower part of the pressure tank, an air distribution plate is installed, and nitrogen flow can be introduced to effectively avoid the phenomenon of ash accumulation in the pressure tank and blockage of ash particles, so as to ensure smooth ash discharge. the

6. The pressure tank can continuously feed and cool the material, and the ash storage bin can continuously discharge low-temperature and low-pressure ash particles. the

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention. the

In the figure, there are: feed inlet 1, water jacket 2, pressure tank 3, heat exchange coil 4, air distribution plate 5, first feeding valve 6, second feeding valve 7, variable pressure tank inflation valve 8, The fourth pipeline 9, the pressure transformer 10, the first discharge valve 11, the second discharge valve 12, the ash storage bin inflation valve 13, the fifth pipeline 14, the ash storage bin 15, the first pipeline 16, the cyclone Separator 17, U-shaped return valve 18, multi-stage pressure reducing valve 19, first balance valve 20, second pipeline 21, third pipeline 22, intersection 23, variable pressure tank release valve 24, second Balance valve 25, third discharge valve 26, fourth discharge valve 27, compressor 28. the

Detailed ways

The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings. The high-temperature and high-pressure ash particles mentioned in the present invention refer to ash particles with a temperature of 500-1000 degrees Celsius and a pressure of 0.5-10 MPa. the

As shown in Fig. 1, a kind of ash discharging device for the high temperature and high pressure ash particles of the present invention includes a pressure tank 3, a transformer tank 10, an ash storage bin 15, a cyclone separator 17, a U-shaped return valve 18, a first The pipeline 16 , the second pipeline 21 , the third pipeline 22 , the fourth pipeline 9 and the fifth pipeline 14 . The upper part of the pressure tank 3 is provided with a feed port 1 . The feed port 1 is used to add high-temperature and high-pressure ash particles into the pressure tank 3 . A heat exchange coil 4 is arranged in the inner cavity of the pressure tank 3 . The water inlet and outlet of the heat exchange coil 4 are located outside the pressure tank 3 . The heat exchange coil 4 is filled with a cooling medium, which can cool down the high temperature and high pressure ash particles. The heat exchange coil 4 can be water-cooled or steam-cooled. The cooling medium can be water or steam. The lower part of the pressure tank 3 is provided with an air distribution plate 5 . Nitrogen gas is introduced into the air distribution plate 5, which can effectively prevent the ash particles from bridging, ensure smooth ash discharge, and also play a role in cooling the ash particles. The cyclone separator 17 and the U-shaped return valve 18 are located outside the pressure tank 3 , and the cyclone separator 17 communicates with the top of the pressure tank 3 through a pipeline. The bottom of the cyclone separator 17 communicates with the feed port of the U-shaped return valve 18 , and the discharge port of the U-shaped return valve 18 communicates with the pressure tank 3 . The bottom end of the pressure tank 3 is connected with the top end of the pressure change tank 10 through the first feed valve 6 and the second feed valve 7 . Set the first feeding valve 6 and the second feeding valve 7, the first feeding valve 6 is for material control, and controls most of the materials, but there is air leakage; the second feeding valve 7 is sealed gas, Prevent a large amount of gas leakage. The bottom end of the variable pressure tank 10 is connected with the top end of the ash storage bin 15 through a first discharge valve 11 and a second discharge valve 12 . Set the first discharge valve 11 and the second discharge valve 12, the first discharge valve 11 is for material control, and controls most of the materials, but there is air leakage; the second discharge valve 12 is sealed gas, Prevent a large amount of gas leakage. The top air inlet of the first pipeline 16 communicates with the cyclone separator 17, the middle part of the first pipeline 16 is provided with a multi-stage pressure reducing valve 19, and the lower part of the first pipeline 16 passes through the third discharge valve 26 and the fourth discharge valve. The valve 27 is connected with the bottom end of the ash storage bin 15 . The third discharge valve 26 and the fourth discharge valve 27 are set, the third discharge valve 26 is for material control, and most of the materials are controlled, but there is air leakage; the fourth discharge valve 27 is sealed gas, Prevent a large amount of gas leakage. The top end of the second pipeline 21 communicates with the pressure tank 3 , and the bottom end of the second pipeline 21 communicates with the ash storage bin 15 . One end of the third pipeline 22 communicates with the pressure transformer tank 10 , and the other end of the third pipeline 22 communicates with the first pipeline 16 . The middle part of the third pipeline 22 communicates with the second pipeline 21 through the junction 23 . The third pipeline 22 is provided with a variable pressure tank release valve 24 which is located between the second pipeline 21 and the first pipeline 16 . The second pipeline 21 is provided with a first balance valve 20 and a second balance valve 25, the first balance valve 20 is located between the junction 23 and the top of the second pipeline 21, and the second balance valve 25 is located between the junction 23 and the second pipeline 21. Between the bottom ends of the two pipelines 21. The multi-stage pressure reducing valve 19 is located between the top of the first pipeline 16 and the third pipeline 22 . One end of the fourth pipeline 9 communicates with the pressure transformer tank 10 , and the pressure transformer tank inflation valve 8 is provided on the fourth pipeline 9 . One end of the fifth pipeline 14 communicates with the ash storage bin 15 , and the fifth pipeline 14 is provided with an ash storage bin inflation valve 13 . the

Further, the ash discharge device for high temperature and high pressure ash particles also includes a water jacket 2, the water jacket 2 is wrapped on the outer wall of the feed inlet 1, and the water jacket 2 communicates with the water outlet of the heat exchange coil 4 . The water jacket 2 is provided to cool the feed port 1, avoiding damage to the feed port 1 caused by the high temperature of the ash particles, and to protect the feed port 1. the

Further, the ash discharge device for high-temperature and high-pressure ash particles also includes a compressor 28, and the lower part of the first pipeline 16 is T-shaped, including a first branch, a second branch and a third branch, Among them, the first branch is connected with the multi-stage decompression valve 19, the end of the second branch is opposite to the air outlet of the compressor, and the third branch is connected with the ash storage valve through the third discharge valve 26 and the fourth discharge valve 27. The bottom of storehouse 15 is connected, and the end of the third branch is the ash outlet. the

Adding the compressor 28 can ensure that the ash particles are discharged from the ash outlet of the first branch, and improve the ash discharge efficiency. the

The above-mentioned ash discharge method for the ash discharge device for high temperature and high pressure ash particles comprises the following steps:

Step 10) Reduce the temperature of the ash particles: the initial state of all valves is closed, and the multi-stage pressure reducing valve 19 is opened at the beginning of feeding, and the cooling medium is passed into the heat exchange coil 4 located inside the pressure tank 3, and the cooling medium is supplied to the heat exchange coil 4 located inside the pressure tank 3. Nitrogen gas is passed into the air distribution plate 5 at the bottom of the tank 3, and then the high-temperature and high-pressure ash particles are discharged into the pressure tank 3 through the feed port 1, and the cooling medium and nitrogen cool the ash particles; the gas in the pressure tank 3 flows to the first Pipeline 16, wherein the gas contains ash particles, after being separated by the cyclone separator 17, the ash particles enter the separation standpipe of the cyclone separator 17, and then pass through the U-shaped return valve 18 to send the separated ash particles back to the pressure In the tank 3; after the gas at the outlet of the cyclone separator 17 is depressurized by the multi-stage pressure reducing valve 19, it is discharged as the ash particles in the ash storage bin 15 and discharged from the first pipeline 16;

Step 20) Ash discharge into the pressure transformer 10: First, open the gas pressure valve 8 of the pressure transformer, fill nitrogen into the pressure transformer 10 through the gas pressure valve 8 of the pressure transformer, when the gas pressure in the pressure transformer 10 is close to the pressure When the gas pressure of the tank 3 is closed, the pressure transformer tank filling valve 8 is opened, and the first balance valve 20 is opened until the pressure in the pressure tank 3 and the pressure transformer tank 10 is equal; then, the second feeding valve 7 and the first feeding valve are opened in sequence Valve 6, the ash particles in the pressure tank 3 enter the variable pressure tank 10, and finally, close the first balancing valve 20, the first feeding valve 6 and the second feeding valve 7 in sequence;

Step 30) Reduce the pressure of the ash particles: open the pressure tank release valve 24 until the gas pressure in the pressure tank 10 is close to the gas pressure in the ash storage bin 15, then close the pressure tank release valve 24;

Step 40) Ash discharge: first, open the second balance valve 25 until the pressure between the variable pressure tank 10 and the ash storage bin 15 is balanced, then open the second discharge valve 12 and the first discharge valve 11 in sequence, and the ash particles Enter the ash storage bin 15 from the pressure transformer 10 under the action of gravity, then close the first discharge valve 11, the second discharge valve 12 and the second balance valve 25 in sequence, then open the ash storage bin inflation valve 13, Inflate gas into the ash storage bin 15, then open the fourth discharge valve 27 and the third discharge valve 26 in sequence, and fill the ash storage bin 15 with nitrogen through the ash storage bin inflation valve 13, and the ash particles will be discharged under the action of gravity. Under the transportation of nitrogen and nitrogen, it enters the first pipeline 16 from the ash storage bin 15 and is discharged from the ash outlet of the first pipeline 16.

In the ash discharge method of the present invention, the high-temperature and high-pressure ash particles are subjected to one temperature-lowering and one-time pressure-lowering treatment, so as to obtain low-temperature and low-pressure ash particles. The present invention first carries out cooling treatment: in the pressure tank 3, the ash particles are cooled. Specifically, the ash particles are cooled by the heat exchange coil 4 and the air distribution plate 5 arranged in the pressure tank 3 . Then carry out decompression treatment: the decompression treatment is carried out in the pressure change tank 10, and the pressure change tank release valve 24 is opened until the gas pressure in the pressure change tank 10 is close to the gas pressure in the ash storage bin 15. By reducing the temperature and reducing the pressure once, the temperature and pressure reduction treatment of the ash particles is realized. The pressure in the ash storage bin can be 2MP-4MP, and the specific value is determined by the conveying distance of the ash particles. The temperature of the ash particles discharged in the ash storage bin 15 is lower than 400 degrees centigrade. The effect of the multi-stage decompression valve 19 keeps the pressure in the pressure tank 3 at a constant value, and the pressure in the pressure tank 3 will not increase due to inflation. the

In the present invention, two valves are respectively arranged between the pressure tank 3 and the pressure change tank 10 and between the pressure change tank 10 and the ash storage bin 15 . The upper valve is used for material control, controlling most of the material, but there is air leakage. The valve located below is used to seal the gas and prevent the gas from leaking in large quantities. When enabled, first open the lower valve, then open the upper valve. When closing, the upper valve is closed first, and then the lower valve is closed. The setting of the two valves is conducive to the safe operation of the whole device. the

In the ash discharge process of the present invention, the high-temperature and high-pressure ash particles are first cooled in the pressure tank 3 by the cooling medium and the loose wind, then decompressed in the transformer tank 10, stored in the ash storage bin 15, and finally the low-temperature and low-pressure Ash particles are expelled by pneumatic force. Aiming at the gasification technology of solid-state slag and ash discharge, the solid-state ash discharge method provided by the invention can solve the difficult problem of high-temperature and high-pressure ash discharge. the

Claims (4)

1. An ash discharge device for high-temperature and high-pressure ash particles, characterized in that the ash discharge device includes a pressure tank (3), a transformer tank (10), an ash storage bin (15), a cyclone separator (17), U-type return valve (18), first pipeline (16), second pipeline (21), third pipeline (22), fourth pipeline (9) and fifth pipeline (14), pressure The upper part of the tank (3) is provided with a feed inlet (1), and the inner cavity of the pressure tank (3) is provided with a heat exchange coil (4), and the water inlet and outlet of the heat exchange coil (4) are located in the pressure tank On the outside of (3), the lower part of the pressure tank (3) is provided with an air distribution plate (5), the cyclone separator (17) and the U-shaped return valve (18) are located outside the pressure tank (3), and the cyclone separator (17) communicates with the top of the pressure tank (3) through a pipeline, the bottom of the cyclone separator (17) communicates with the inlet port of the U-shaped return valve (18), and the outlet port of the U-type return valve (18) Connected with the pressure tank (3); The bottom end of the pressure tank (3) is connected to the top end of the pressure change tank (10) through the first discharge valve (6) and the second discharge valve (7), and the bottom end of the pressure change tank (10) is connected through the first discharge valve (7). The feed valve (11) and the second discharge valve (12) are connected to the top of the ash storage bin (15); The top air inlet of the first pipeline (16) communicates with the cyclone separator (17), the middle part of the first pipeline (16) is provided with a multi-stage pressure reducing valve (19), and the lower part of the first pipeline (16) passes through the The three discharge valves (26) and the fourth discharge valve (27) are connected to the bottom of the ash storage bin (15); The top of the second pipeline (21) communicates with the pressure tank (3), the bottom of the second pipeline (21) communicates with the ash storage bin (15), and one end of the third pipeline (22) communicates with the pressure tank ( 10) communication, the other end of the third pipeline (22) communicates with the first pipeline (16), and the middle part of the third pipeline (22) communicates with the second pipeline (21) through the intersection (23). The three-pipeline (22) is provided with a pressure-transformer vent valve (24), and the pressure-transformer vent valve (24) is located between the second pipeline (21) and the first pipeline (16); the second The pipeline (21) is provided with a first balance valve (20) and a second balance valve (25). The first balance valve (20) is located between the intersection (23) and the top of the second pipeline (21). The second balance valve (25) is located between the junction (23) and the bottom of the second pipeline (21); the multi-stage pressure reducing valve (19) is located at the top of the first pipeline (16) and the third pipeline (22) between; One end of the fourth pipeline (9) communicates with the pressure transformer tank (10), and the fourth pipeline (9) is provided with a pressure transformer inflation valve (8); one end of the fifth pipeline (14) is connected with the ash storage The bins (15) are connected, and the fifth pipeline (14) is provided with an ash storage bin inflation valve (13). 2. The ash discharge device for high-temperature and high-pressure ash particles according to claim 1, which is characterized in that it also includes a water jacket (2), and the water jacket (2) is wrapped on the outer wall of the feed inlet (1), The water jacket (2) communicates with the water outlet of the heat exchange coil (4). 3. The ash discharge device for high-temperature and high-pressure ash particles according to claim 1, characterized in that it also includes a compressor (28), the lower part of the first pipeline (16) is T-shaped, and contains a first Road, the second branch and the third branch, wherein, the first branch is connected with the multi-stage pressure reducing valve (19), the end of the second branch is opposite to the air outlet of the compressor, and the third branch passes through the third The discharge valve (26) and the fourth discharge valve (27) are connected to the bottom of the ash storage bin (15), and the end of the third branch is the ash outlet. 4. an ash discharge method utilizing the ash discharge device for high temperature and high pressure ash particles according to claim 1, is characterized in that, the ash discharge method comprises the following steps: Step 10) Reduce the temperature of the ash particles: all valves are initially closed, and the multi-stage pressure reducing valve (19) is opened at the beginning of feeding, and feeds into the heat exchange coil (4) inside the pressure tank (3) Cooling medium, blow nitrogen into the air distribution plate (5) located at the lower part of the pressure tank (3), and then discharge high-temperature and high-pressure ash particles into the pressure tank (3) through the feed port (1), the cooling medium and Nitrogen cools the ash particles; the gas in the pressure tank (3) flows to the first pipeline (16), wherein the gas contains ash particles, and after being separated by the cyclone separator (17), the ash particles enter the cyclone separator (17) In the separation standpipe, the separated ash particles are sent back to the pressure tank (3) through the U-shaped return valve (18); the gas at the outlet of the cyclone separator (17) is depressurized by the multi-stage pressure reducing valve (19) , as the ash particles in the ash storage bin (15) are discharged from the first pipeline (16); Step 20) Discharge ash into the pressure transformer (10): First, open the pressure transformer inflation valve (8), and fill nitrogen into the pressure transformer (10) through the pressure transformer inflation valve (8). When the gas pressure in the tank (10) is close to the gas pressure of the pressure tank (3), close the pressure change tank inflation valve (8), open the first balance valve (20), until the pressure tank (3) and the pressure change tank (10 ) are equal in pressure; then, open the second feed valve (7) and the first feed valve (6) in turn, the ash particles in the pressure tank (3) enter into the pressure change tank (10), and finally, close the first feed valve (6) in sequence A balance valve (20), a first feeding valve (6) and a second feeding valve (7); Step 30) Reduce the pressure of the ash particles: open the air release valve (24) of the pressure change tank until the gas pressure in the pressure change tank (10) is close to the gas pressure in the ash storage bin (15), then close the air release valve of the pressure change tank (twenty four); Step 40) Ash discharge: First, open the second balance valve (25), until the pressure between the pressure change tank (10) and the ash storage bin (15) is balanced, then open the second discharge valve (12) and the second A discharge valve (11), the ash particles enter the ash storage bin (15) from the pressure change tank (10) under the action of gravity, and then close the first discharge valve (11), the second discharge valve (12) in sequence ) and the second balance valve (25), then open the ash storage bin inflation valve (13) to fill the ash storage bin (15) with gas, then open the fourth discharge valve (27) and the third discharge valve in sequence The feed valve (26) fills the ash storage bin (15) with nitrogen gas through the ash storage bin inflation valve (13), and the ash particles enter the first ash storage bin (15) under the action of gravity and nitrogen transport. In the pipeline (16), it is discharged from the ash outlet of the first pipeline (16).

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