阅读说明：本技术 一种回转窑低阶煤热解循环提质工艺 (Rotary kiln low-rank coal pyrolysis cyclic upgrading process ) 是由 李水清 杨远平 黄骞 宋民航 于 2020-03-06 设计创作，主要内容包括：本发明涉及一种回转窑低阶煤热解循环提质工艺,该方法采用回转窑对低阶煤进行热解提质,生成含有煤焦油和粉尘的高温煤气和提质焦；高温煤气经两级旋风除尘后再经冷却塔初冷(300-320℃),冷凝分离重质焦油；将旋风除尘器中捕集的煤/焦粉与重质焦油混合热压成型制备型煤/焦,并送入回转窑内循环热解；经二级冷却塔、焦油回收塔进一步净化后的冷煤气通入落焦池中熄焦并加热煤气,加热后的煤气一部分作为回转窑的燃料燃烧供热,另一部分为溶剂回收塔回收溶剂供热；落焦池壁布置空气盘管,用来加热燃烧煤气使用的空气。本发明可以实现低阶煤的清洁高效提质,通过重质焦油循环热解和煤气循环载热熄焦,可显著提高产品质量和产率、降低能耗。(The invention relates to a rotary kiln low-rank coal pyrolysis cyclic upgrading process, which adopts a rotary kiln to carry out pyrolysis upgrading on low-rank coal to generate high-temperature coal gas containing coal tar and dust and upgraded coke; the high-temperature coal gas is dedusted by two stages of cyclone and then is initially cooled by a cooling tower (300-; mixing the coal/coke powder captured in the cyclone dust collector with heavy tar, performing hot-press molding to prepare molded coal/coke, and feeding the molded coal/coke into a rotary kiln for circulating pyrolysis; introducing the cold coal gas further purified by the secondary cooling tower and the tar recovery tower into a coke dropping pool to quench coke and heat the coal gas, wherein one part of the heated coal gas is used as fuel of the rotary kiln to burn and supply heat, and the other part of the heated coal gas is used for supplying heat for the solvent recovered by the solvent recovery tower; the wall of the coke falling pool is provided with an air coil pipe used for heating air used for burning coal gas. The invention can realize the clean and efficient quality improvement of low-rank coal, and can remarkably improve the product quality and yield and reduce the energy consumption through the circulating pyrolysis of heavy tar and the circulating heat-carrying coke quenching of coal gas.)

1. The rotary kiln low-rank coal pyrolysis cyclic quality improvement process is characterized by comprising a tar recovery tower (1), a secondary cooling tower (2), a primary cooling tower (3), a secondary cyclone dust collector (4), a primary cyclone dust collector (4), a burner (6), a rotary kiln (7), a coal hopper (8), a conveyor belt (9), a coal feeder (10), a forming machine (11), a coke dropping tank (12), a coke pool (13), a mixing chamber (14), a solvent recovery tower (15), an air heat exchange tube (16), a coke pool switch valve (17), a buffer plate (18), a heat insulation layer (19), a rotational flow plate (20), a solvent sprayer (21), a feed pump (22), a reboiler (23), a reflux tank (24), a condenser (25), a partition plate (26), a cooling tube (27), a baffle plate (28), a tar pool (29), a tar scraper (30) and a tar switch valve (31).

2. The method as claimed in claim 1, wherein the pyrolysis gas is discharged from the higher end of the rotary kiln (7) and then passes through a primary cyclone (5), a secondary cyclone (4), a primary cooling tower (3) and a secondary cooling tower (2) in sequence; then passes through a primary cooling tower (3); the primary cooling tower (3) primarily cools and cools the coal gas, a heat exchange tube is arranged in the primary cooling tower to adjust the temperature in the tower, and meanwhile, a partition plate and a plurality of baffle plates are arranged in the tower, so that the gas in the tower is fully disturbed to reduce the gas temperature gradient, and the temperature in the tower is maintained between 300 ℃ and 320 ℃ so as to condense and separate the heavy coal tar component.

3. The method of claim 1, wherein the coal/coke powder particles filtered by the two-stage cyclone dust collector and the heavy tar component condensed by the primary cooling tower (3) are conveyed to a mixing chamber (14) to be fully mixed, the mixture of the coal/coke powder particles and the heavy tar is subjected to hot press forming by a forming machine (11) to prepare high-strength briquette/coke, and the formed briquette/coke is conveyed into a coal hopper (8) through a conveyor belt (9) and is conveyed into a rotary kiln (7) together with low-rank coal to be subjected to cyclic pyrolysis.

4. The method of claim 1, characterized in that the secondary cooling tower (2) adopts solvent spray to cool and absorb tar, and the mixture of the tar and the absorbent in the secondary cooling tower (2) is discharged from the bottom of the cooling tower and is conveyed to the solvent recovery tower (15); the coal tar is cooled by the secondary cooling tower (2), the coal tar is absorbed, the coal tar is cooled, and the coal tar in the gas phase is recovered by the tar recovery tower (1).

5. The method is characterized in that the purified cold coal gas is used as a circulating heat-carrying medium, a coal gas inlet pipe on the inclined surface of the coke falling pool (12) is led into the coke falling pool (12) and is in contact with high-temperature coke in the coke falling pool (12) for heat exchange, and the temperature of the coal gas is increased while quenching the coke; hot coal gas is discharged from a coal gas outlet at the top of the coke falling pool (12), the gas outlet is divided into two branches, one branch is directly connected with an inlet of a burner (5) and used for providing heat required by the rotary kiln for combustion, high-temperature coal gas of the other branch provides heat for a reboiler (23) of a solvent recovery tower (15), low-temperature coal gas discharged from a heat exchange tube of the reboiler (23) is recycled and introduced into the coke falling pool (12) for quenching and raising the temperature of the coal gas, and surplus low-temperature coal gas is output as a coal gas product.

6. The method according to claim 1, characterized in that the coke-falling side of the coke-falling pool (12) is provided with an inclined surface, two or more buffer plates are arranged on the inclined surface, one or more cold gas inlet pipes are arranged below each buffer plate for the purpose of dispersing the gas, air preheating pipes (16) are arranged on the other three wall surfaces of the coke-falling pool (12), and the temperature of the coke in the coke-falling pool (12) is further reduced while the air used for burning the high-temperature gas by the heating burner (6) is combusted.

7. The coke oven as claimed in claim 1, wherein a coke oven switch valve is arranged at the lower part of the coke oven chamber (12), medium and low temperature coke in the coke oven chamber is periodically discharged into the coke oven chamber (13), and a water sprayer is arranged at the upper part of the coke oven chamber (13) and used for regulating and controlling the temperature of the coke.

8. The method as claimed in claim 1, characterized in that the fuel of the burner (6) is high-temperature circulating gas, the amount of the gas can be proper or excessive, and the heat of the high-temperature coke can be fully applied to the process as much as possible; the burner (6) is arranged at the lower end of the rotary kiln (7), and high-temperature coke generated in the pyrolysis process of the rotary kiln (7) directly falls into the coke dropping pool (12).

9. The rotary kiln as recited in claim 1, characterized in that the wall of the rotary kiln (7) is provided with a heat insulating layer, and the inner wall of the heat insulating layer is provided with a plurality of cyclone plates (20) for stirring the coal in the rotary kiln to make the pyrolysis more uniform and complete.

Technical Field

The invention relates to a rotary kiln low-rank coal pyrolysis cyclic upgrading process, in particular to a pyrolysis integrated upgrading treatment process for promoting low-rank coal upgrading and coal tar lightening.

Background

Coal is the basic and main energy source in China. At present, the coal mined reserves in China are 1145 hundred million tons, and the reserves of medium-rank coal are 635 hundred million tons, accounting for more than 55 percent. With the rapid development of national economy, coal resources are consumed by more than 30 hundred million tons every year, so that high-quality coal resources such as anthracite and coking coal are increasingly deficient, the development and utilization of low-rank coal become necessary trends, and the environmental pollution caused by the large-scale utilization process of the low-rank coal is raised as a hot problem of social attention. Therefore, the enhancement of the clean and efficient utilization of the low-rank coal conforms to the relevant policy of air pollution prevention and control in China, and has great significance for enhancing the autonomous guarantee capability of energy in China and promoting the clean and efficient utilization of coal.

The quality of the low-rank coal is improved by adopting a rotary kiln pyrolysis technology, the low-rank coal can be classified and converted into high-quality-improved coal, light coal tar and high-calorific-value coal gas according to quality, the high-efficiency clean utilization of the low-rank coal is realized, and NO generated in the traditional coal burning process can be greatly reduced_x、SO₂And dust and other atmospheric pollutants are discharged, so that clean utilization of the low-rank coal is realized. However, the rotary kiln adopted for the low-rank coal pyrolysis upgrading process has several problems to be solved urgently. Comprises 1) high dust content pipeline of coal gas is easy to block, 2) light coal tar yield is low, and 3) coal blocks are broken seriously, so that high-quality coke and clean coal gas are difficult to obtain.

In order to solve the problems, the invention realizes high-value gradient utilization of low-rank coal, and obtains high-quality upgraded coke, high-added-value light coal tar and high-heat-value clean coal gas by a rotary kiln low-rank coal pyrolysis integrated upgrading treatment process.

Disclosure of Invention

The invention provides a rotary kiln low-rank coal pyrolysis cycle integrated upgrading process capable of improving the yield of light tar and reducing the yield of coal/coke powder, aiming at solving the problems in the existing low-rank coal utilization process.

The rotary kiln low-rank coal pyrolysis cyclic upgrading process comprises a tar recovery tower, a secondary cooling tower, a primary cooling tower, a secondary cyclone, a primary cyclone, a burner, a rotary kiln, a coal hopper, a conveyor belt, a coal feeder, a forming machine, a coke dropping tank, a coke tank, a mixing chamber, a solvent recovery tower, an air heat exchange tube, a coke tank switch valve, a buffer plate, a heat preservation layer, a rotational flow plate, a solvent sprayer, a feed pump, a reboiler, a reflux tank, a condenser, a partition plate, a cooling tube, a baffle plate, a tar tank, a tar scraper and a tar switch valve.

In one example, the coal hopper is positioned at the upper end of the rotary kiln and used for storing low-rank coal; during the operation of the rotary kiln, the coal blocks fall from the bottom outlet of the coal hopper, are conveyed to the interior of the rotary kiln through the coal feeder and are in countercurrent contact with high-temperature airflow generated by coal gas combustion for pyrolysis.

In one example, the heat-insulating layer is arranged on the inner wall surface of the rotary kiln, and the rotational flow plate is arranged on the inner side of the heat-insulating layer and used for stirring coal in the rotary kiln to enable the coal to be pyrolyzed more uniformly and fully.

In one example, the burner is arranged at the lower end of the rotary kiln, the lower end of the rotary kiln is connected with an inlet at the upper end of the coke falling pool, an outlet at the higher end of the rotary kiln is connected with an inlet of a primary cyclone dust collector, an outlet at the top end of the primary cyclone dust collector is connected with an inlet of a secondary cyclone dust collector, an outlet at the top end of the secondary cyclone dust collector is connected with an inlet of a primary cooling tower, the temperature in the primary cooling tower is controlled to be 300-320 ℃, and a partition plate and a baffle plate are arranged in the primary cooling tower to enable the temperature gradient of pyrolysis gas to be as small as possible.

In one example, the pyrolysis coal gas is dedusted by a bottom outlet of a primary cyclone deduster and a secondary cyclone deduster, then is subjected to primary cooling and condensation by a primary cooling tower to separate heavy tar components, and the collected coal/coke powder and the heavy tar components are conveyed to a mixing chamber to be fully mixed;

in one example, the mixture of the coal/coke powder and the heavy tar mixed in the mixing chamber is subjected to hot-press forming by a forming machine to prepare high-strength coal/coke; and the molded coal/coke is conveyed to another coal hopper through a conveyor belt and is conveyed into the rotary kiln together with the low-rank coal for circular pyrolysis.

In one example, the coal gas discharged from the top end of the primary cooling tower is conveyed into a secondary cooling tower, the coal gas in the secondary cooling tower is sprayed with a solvent to cool and absorb light coal tar, and a mixture of the solvent and the coal tar is discharged into a solvent recovery tower from the bottom of the secondary cooling tower; conveying the coal gas discharged from the secondary cooling tower to a tar recovery tower, and conveying the coal gas after further collecting coal tar by the tar recovery tower to a coke falling pool to contact with high-temperature coke for heat exchange;

in one example, high-temperature coke generated by pyrolysis of low-rank coal in the rotary kiln slides into a coke dropping pool through an inclined plane of the coke dropping pool, and two or more buffer plates are arranged on the inclined plane of the coke dropping pool to reduce the crushing degree of the coke dropping process;

in one example, the cold coal gas discharged from the tar recovery tower is introduced into a coke dropping pool through a plurality of coal gas inlet pipes arranged at the lower part of an inclined buffer plate of the coke dropping chamber, so that the temperature of the coal coke is reduced, and the coal gas is heated while the coke is quenched; the heated high-temperature coal gas is discharged from an outlet at the top of the coke falling pool and is divided into two branches, wherein one branch of the coal gas is used as fuel and is combusted by a burner to supply heat to the rotary kiln, and the other branch of the coal gas is connected with an inlet of a heat exchange tube of a reboiler of a solvent recovery tower to provide heat for a solvent recovery section; the heat exchange tube of the reboiler of the solvent recovery tower is merged with the cold coal gas discharged by the tar recovery tower and then is introduced into a coke dropping chamber for circulating heat exchange and coke quenching, and the surplus coal gas is finally obtained clean coal gas;

in one example, air preheating pipes are arranged on three vertical pool walls of the coke falling pool except for the inclined plane, and the preheated air is connected with a burner;

in one example, a coke pool switch valve is arranged at the bottom of the coke dropping pool, the coke cooled in the coke dropping pool is periodically discharged into the coke pool, a water sprayer is arranged at the upper part of the coke pool, and the temperature of the coke is adjusted by starting when necessary.

In the rotary kiln low-rank coal pyrolysis cyclic upgrading process, the low-rank coal blocks fall from the bottom outlet of the coal hopper and are sent into the rotary kiln through the coal feeder, the coal blocks are subjected to high-temperature pyrolysis reaction in the rotary kiln to generate upgraded coke blocks, tar and coal gas, and the high-temperature coal gas simultaneously contains coke powder, non-pyrolyzed coal powder and tar with low density due to the fact that the coal blocks are easy to break to form fine coal/coke dust in the pyrolysis process and are carried by airflow. The coal gas carrying coke/coal powder and tar oil flows out from the higher end of the rotary kiln, and the coal gas, the coke/coal powder and the tar oil sequentially enter a primary cyclone dust collector and a secondary cyclone dust collector, are subjected to centrifugal separation, firstly separate the coal/coke powder with higher density, and are respectively discharged from the bottom outlets of the primary cyclone dust collector and the secondary cyclone dust collector; then, the coal gas carries tar into a primary cooling tower, the temperature in the primary cooling tower is controlled to be 300-320 ℃, and the heavy tar component in the tar is favorably separated and discharged from a bottom outlet of the primary cooling tower; and (2) carrying out secondary cooling on the uncondensed coal gas and the light tar, adopting solvent spraying to absorb the light tar and simultaneously reduce the temperature of the coal tar and the coal gas, then enabling a mixture of the solvent and the coal tar to flow into a solvent recovery tower from the bottom of the tar recovery tower, enabling the cooled coal gas to enter the tar recovery tower, and further separating and recovering the light tar and the coal gas. Meanwhile, purified cold coal gas flows out from an outlet at the top of the tar recovery tower, is directly introduced from a coal gas pipe inlet on the inclined surface of the coke falling pool and is in contact with high-temperature coke for heat exchange, and air preheating pipes are arranged on the other three wall surfaces of the coke falling pool and are used for heating air for the burner. Due to the combined action of the cold coal gas introduced from the inclined plane of the coke falling pool and the air heat exchange tube, the high-temperature upgraded coke in the coke falling pool can be cooled to achieve the purpose of coke quenching. The heated coal gas flows out from an outlet at the upper end of the coke falling pool, the flowing high-temperature coal gas is divided into two branches, wherein one branch of high-temperature coal gas directly enters a burner to be combusted so as to provide required heat for the high-temperature pyrolysis of the coal blocks in the rotary kiln; introducing the other path of high-temperature coal gas into a heat exchange pipe of a reboiler of the solvent recovery tower to exchange heat and recover the spray solvent used by the secondary cooling tower; and introducing part of the low-temperature coal gas subjected to heat exchange in the solvent recovery tower into a coke falling pool for circulating heat exchange, wherein the rest part is the finally obtained clean coal gas. And the coke/coal powder discharged from outlets at the bottoms of the primary cyclone dust collector and the secondary cyclone dust collector and the heavy tar discharged from the bottom of the primary cooling tower are jointly conveyed into a mixing chamber to be mixed, then the mixture is conveyed into a forming machine, the coke/coal powder and the heavy tar are prepared into high-strength coal/coke through the hot press forming action of the forming machine, the high-strength coal/coke is finally conveyed into a coal hopper through a conveying belt, and the high-strength coal/coke and coal blocks in the coal hopper are jointly conveyed into the rotary kiln to be subjected to circulating high-temperature pyrolysis.

The invention has the beneficial effects that:

1. the heavy tar component condensed and separated by the primary cooling tower is used as a binder, and is mixed with coke/coal powder settled from the bottom of the cyclone dust collector to be hot-pressed and molded to prepare high-strength briquette/coke, and the briquette/coke is sent into the rotary kiln to be pyrolyzed circularly, so that the quality and yield of high-added-value light tar and coal gas are improved, and the resource utilization of the coal/coke powder is realized;

2. the formed coal/coke enters the rotary kiln for cyclic pyrolysis, and the heavy tar component in the formed coal/coke has higher viscosity, so that the formed coal/coke is favorable for adhering coke powder generated by crushing in the pyrolysis process of low-rank coal, reducing the dust content in the pyrolysis process of the rotary kiln and relieving the problem of pipeline blockage;

3. the whole process takes coal gas as a heat carrier for circulating heat exchange, so that the heat in high-temperature coke can be efficiently recycled while dry quenching is realized, the environmental pollution generated in the traditional wet quenching process can be greatly reduced, and the heat efficiency of the process is improved;

4. the heat in the rotary kiln is directly supplied by burning clean coal gas obtained by pyrolyzing the low-rank coal, so that the generation of pollutants in the rotary kiln caused by burning coal powder by using a traditional burner is avoided.

Drawings

FIG. 1 is a system process diagram of a rotary kiln low-rank coal pyrolysis cyclic upgrading process;

FIG. 2 is a flow chart of a rotary kiln low-rank coal pyrolysis cyclic upgrading process;

FIG. 3 is a schematic structural view of a decoking tank according to the present invention;

FIG. 4-1 is a sectional view of a rotary kiln according to the present invention;

FIG. 4-2 is a schematic view of the internal perspective structure of the rotary kiln of the present invention;

FIG. 5-1 is a process diagram of a coal tar solvent spray absorption and solvent recovery system of the present invention;

FIG. 5-2 is a schematic diagram of a secondary cooling tower of the present invention.

Description of the reference numerals

1: tar recovery tower

2: secondary cooling tower

3: first-stage cooling tower

4: two-stage cyclone dust collector

5: first-stage cyclone dust collector

6: burner

7: rotary kiln

8: coal hopper

9: conveyor belt

10: coal feeder

11: forming machine

12: coke discharging pool

13: coke pool

14: mixing chamber

15: solvent evaporator

16: air heat exchange tube

17: coke oven switch valve

18: buffer board

19: heat insulation layer

20: rotational flow plate

21: a solvent sprayer.

22: feed pump

23: reboiler device

24: reflux tank

25: condenser

26: partition board

27: cooling pipe

28: baffle plate

29: tar pool

30: tar scraper

31: tar switch valve

Detailed Description

In order to clarify the purpose, technical scheme and advantages of the present invention, the rotary kiln low-rank coal pyrolysis cyclic upgrading process of the present invention is further described in detail by the following examples. It should be noted that the specific embodiments described herein are only for explaining the present invention and are not used to limit the present invention.

As shown in figures 1 and 2, the rotary kiln low-rank coal pyrolysis cyclic upgrading process comprises a tar recovery tower (1), a secondary cooling tower (2), a primary cooling tower (3), a secondary cyclone dust collector (4), a primary cyclone dust collector (4), a burner (6), a rotary kiln (7), a coal hopper (8), a conveyor belt (9), a coal feeder (10), a forming machine (11), a coke dropping tank (12), a coke tank (13), a mixing chamber (14), a solvent recovery tower (15), an air heat exchange pipe (16), a coke tank switch valve (17), a buffer plate (18), an insulating layer (19), a cyclone plate (20), a solvent sprayer (21), a feeding pump (22), a reboiler (23), a reflux tank (24), a condenser (25), a partition plate (26), a cooling pipe (27), a baffle plate (28) and a tar tank (29), a tar scraper (30) and a tar switch valve (31).

As shown in fig. 1, the coal hopper (8) is positioned at the higher end of the rotary kiln (7) and is used for storing low-rank coal; in the operation process of the rotary kiln (7), the coal blocks fall from the bottom outlet of the coal hopper (8), and are sent into the rotary kiln (7) through the coal feeder (10).

As shown in fig. 1 and 3, the burner (6) is disposed at the lower end of the rotary kiln (7), and the lower portion of the lower end of the rotary kiln (7) is connected to the upper inlet of the decoking pool (11), so that the high-temperature coke generated by pyrolysis of the low-rank coal in the rotary kiln (7) falls into the decoking pool (12).

As shown in fig. 4-1 and 4-2, a heat insulation layer (19) is installed on the inner wall surface of the rotary kiln (7), and a plurality of cyclone plates (20) are arranged on the inner side of the heat insulation layer and used for stirring coal in the rotary kiln to enable the coal to be pyrolyzed more uniformly and fully.

As shown in figure 1, high-temperature coal gas generated by pyrolysis of the rotary kiln (7) is discharged from one end of the rotary kiln (7) at a higher position, and then the high-temperature coal gas is dedusted and cooled by a primary cyclone dust collector (5), a secondary cyclone dust collector (4), a primary cooling tower (3), a secondary cooling tower (2) and a tar recovery tower (1) in sequence and heavy tar and light tar components in the coal gas are respectively separated and collected.

As shown in fig. 1 and 2, the coal/coke powder settled and collected in the primary cyclone dust collector (5) and the secondary cyclone dust collector (4) and the heavy coal tar component separated and collected by the primary cooling tower (3) are conveyed into a mixing chamber (14) to be fully stirred and mixed;

as shown in fig. 1 and 2, the mixture of the coal/coke powder and the heavy coal tar mixed in the mixing chamber (14) is hot-pressed and molded by a molding machine (11) to prepare molded coal/coke, the molded coal/coke is conveyed to the upper part of a coal hopper (8) through a conveyor belt (9), and then is conveyed into a rotary kiln together with coal through a coal feeder (10) for pyrolysis;

as shown in fig. 3, the high-temperature coke generated by pyrolysis of the low-rank coal in the rotary kiln slides into the coke dropping pool through the inclined surface of the coke dropping pool (12), and two or more buffer plates (18) are arranged on the coke dropping side of the coke dropping pool (12) and used for buffering the descending speed of the coke and reducing the crushing degree of the coke;

as shown in fig. 1, 3 and 5-1, a cold gas outlet of the tar recovery tower (1) is connected with a gas inlet pipe at the lower part of a slope buffer plate (18) of a decoking pool (12), the gas outlet at the top of the decoking pool (12) is divided into two branches, one branch is directly connected with an inlet of a burner, the other branch is connected with an inlet of a heat exchange pipe of a reboiler (23) of a solvent recovery tower (15), and an outlet of the heat exchange pipe of the reboiler (23) is connected with the cold gas inlet pipe at the lower part of the slope buffer plate (18) of the decoking pool (12);

as shown in fig. 1 and fig. 5-1, the secondary cooling tower (2) adopts a solvent to spray, cool and absorb light coal tar, and the mixture of the solvent and the coal tar is discharged into a solvent recovery tower (15) from the bottom of the secondary cooling tower (2);

as shown in fig. 5-1, a solvent recovery outlet at the top of the solvent recovery tower (15) is connected with an inlet of a solvent sprayer (21) in the secondary cooling tower (2), so that the absorption solvent can be recycled;

as shown in fig. 5-2, the first-stage cooling tower (3) is internally provided with a heat exchange tube for adjusting the temperature in the tower, and is internally provided with a partition plate and a plurality of baffle plates, so that the gas in the tower is fully disturbed to reduce the temperature gradient of the gas, and the temperature in the tower is maintained between 300 ℃ and 320 ℃ so as to condense and separate the heavy coal tar component;

as shown in fig. 3, three vertical tank walls of the coke falling tank (12) except for the inclined plane are provided with air preheating pipes (16), and the outlets of the air preheating pipes are connected with the burner (6);

as shown in figure 3, a coke chest switch valve (17) is arranged at the bottom of the coke chest (12), the coal coke cooled in the coke chest is periodically discharged into the coke chest (14), a sprayer is arranged at the upper part of the coke chest, and water can be sprayed to adjust the temperature of the coal coke if necessary.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.