阅读说明：本技术 一种带辐射废锅的气化炉 (gasification furnace with radiation waste boiler ) 是由 匡建平 姚敏 焦洪桥 刘水刚 黄斌 夏支文 罗春桃 张镓铄 张亚宁 杜常宗 郭中 于 2019-09-27 设计创作，主要内容包括：本申请公开一种带辐射废锅的气化炉,包括承压外壳,燃烧室,辐射废锅和激冷室；辐射废锅包括周向水冷壁管和径向水冷壁管,周向水冷壁管由数个列管组成筒形结构,径向水冷壁管包括大翅片和小翅片；激冷室包括空间激冷室和水浴激冷室；空间激冷室的上缘设置有激冷环,侧壁设有激冷水喷头。本申请利用辐射废锅将粗煤气中的气化显热进行回收,粗煤气温度降为1000℃以下,通过激冷水将粗煤气降温至300℃以下,较低温度的粗煤气通过激冷室下降管进行水浴洗涤、除灰和进一步冷却,最后通过激冷室上升管再次进行气、灰、液空间分离后流出气化炉。本申请具有煤种适用性广,气化效率高,原煤处理能力调节范围大,综合能源利用率高,粗煤气清洁度高等优点。(the application discloses a gasification furnace with a radiation waste pot, which comprises a pressure-bearing shell, a combustion chamber, the radiation waste pot and a chilling chamber; the radiation waste boiler comprises a circumferential water-cooled wall pipe and a radial water-cooled wall pipe, wherein the circumferential water-cooled wall pipe is of a cylindrical structure formed by a plurality of tube arrays, and the radial water-cooled wall pipe comprises a large fin and a small fin; the chilling chamber comprises a space chilling chamber and a water bath chilling chamber; the upper edge of the space chilling chamber is provided with a chilling ring, and the side wall of the space chilling chamber is provided with a chilling water spray head. The gasification sensible heat in the raw gas is recovered by utilizing the radiation waste boiler, the temperature of the raw gas is reduced to be below 1000 ℃, the raw gas is cooled to be below 300 ℃ through chilling water, the raw gas with the lower temperature is subjected to water bath washing, ash removal and further cooling through a chilling chamber descending pipe, and finally the raw gas flows out of the gasification furnace after being subjected to gas, ash and liquid space separation again through a chilling chamber ascending pipe. The method has the advantages of wide coal variety applicability, high gasification efficiency, large raw coal processing capacity adjusting range, high comprehensive energy utilization rate, high cleanliness of crude gas and the like.)

1. A gasification furnace with a radiation waste pot is characterized by comprising a pressure-bearing shell (1), a combustion chamber (2), a radiation waste pot (3) and a chilling chamber (4);

The combustion chamber (2), the radiation waste pot (3) and the chilling chamber (4) are arranged in the pressure-bearing shell (1);

the combustion chamber (2) is communicated with the radiation waste boiler (3) through a slag hole (5);

an overhead burner (21) is arranged at the top of the combustion chamber (2), a plurality of side gasification burners (22) are horizontally and uniformly arranged on the side wall of the combustion chamber (2), and a combustion chamber water-cooled wall coil (23) is also arranged on the side wall of the combustion chamber (2);

the radiation waste boiler (3) comprises a circumferential water wall tube (31) and a radial water wall tube (32), the circumferential water wall tube (31) is of a cylindrical structure formed by a plurality of tube arrays, and the radial water wall tube (32) comprises large fins (321) and small fins (322); the large fins (321) and the small fins (322) are arranged in the circumferential water wall tube (31) at intervals, and the number of the tubes of the large fins (321) is greater than that of the small fins (322);

The chilling chamber (4) is communicated with the radiation waste pot (3), the chilling chamber (4) comprises a space chilling chamber (41), a chilling chamber descending pipe (42) and a water bath chilling chamber (43), and the space chilling chamber (41) is communicated with the water bath chilling chamber (43) through the chilling chamber descending pipe (42);

The upper edge of the space chilling chamber (41) is provided with a chilling ring (411), and the side wall of the space chilling chamber (41) is provided with a chilling water spray head (412).

2. A gasifier according to claim 1, characterized in that said combustion chamber (2), said radiant boiler (3) and said quench chamber (4) are of a unitary structure.

3. a gasifier according to claim 1, characterized in that the number of said lateral gasification burners (22) is 2-6, said lateral gasification burners (22) being all co-directionally offset from the radial direction of said combustion chamber (2) by 0-6 °.

4. The gasifier according to claim 1, characterized in that the ratio of the pulverized coal handling capacity of the overhead burner (21) to the total pulverized coal handling capacity of the side gasification burners (22) is 1 to 4.

5. The gasifier according to claim 1, characterized in that the ratio of the pulverized coal handling capacity of the overhead burner (21) to the total pulverized coal handling capacity of the side gasification burners (22) is 3:2 or 2: 1.

6. A gasifier according to claim 1, characterized in that said water bath quench chamber (43) comprises a slag bath (431) and a quench chamber riser (432) provided above said slag bath (431);

the chilling chamber descending pipe (42) is sleeved in the chilling chamber ascending pipe (432); a raw gas outlet (433) is formed in the side wall of the water bath chilling chamber (43);

The bottom of the slag pool (431) is provided with a slag discharge hole (4311).

Technical Field

The application relates to the technical field of dry coal powder gasification, in particular to a gasification furnace with a radiation waste boiler.

Background

most of the existing dry coal powder entrained flow gasification technologies (such as space furnace, GSP, oriental furnace, Shenning furnace and the like) adopt direct chilling, namely, produced high-temperature crude gas is chilled by water directly after coming out of a combustion chamber, and sensible heat is recovered without a waste boiler. In the direct chilling process, high-temperature raw gas of the gasification furnace is directly contacted and cooled with chilling water, the heat is only used for heating the chilling water to change the chilling water into water vapor, the sensible heat of the high-temperature raw gas is not fully utilized, and as a result, most heat is wasted and the total energy efficiency is lower.

The prior dry coal powder multi-burner entrained flow coal gasification technology with a waste boiler is represented by a shell furnace. The shell furnace process is that high-temperature crude gas generated by the gasification furnace is mixed with cold crude gas returned from downstream, quenched and cooled, and then the crude gas is further cooled by utilizing a convection waste boiler and a washing tower. The dry coal powder has the advantages of wide coal type adaptability; the multi-burner has the advantages that a vortex flow field is formed to improve the carbon conversion rate, and the industrial amplification is easy; the convection waste boiler has the advantage that the sensible heat of the raw gas can be recovered to improve the energy efficiency utilization rate. But the shell furnace technology has the main defects of high investment and complex process flow.

although the shell furnace technology adopts a waste boiler to recover sensible heat, hot crude gas must be mixed with cold crude gas returned from the downstream for cooling, the temperature of the chilled crude gas is reduced from about 850 ℃ to 320 ℃, the heat grade of the temperature interval is low, the equipment investment is expensive, and the process is complex. In addition, convection waste heat boiler operation in shell furnace technology is susceptible to coal quality fluctuation or operation fluctuation, and fly ash may not be completely solidified at the convection waste heat boiler inlet, so that blockage is easy to occur.

although the existing chilling process has short process route and simple structure, the defects of low thermal efficiency, serious resource waste, unreasonable energy utilization and the like exist at the same time; the whole waste boiler process consists of radiation waste boilers and convection waste boilers, and has the defects of complex equipment, high operation difficulty, high investment and the like. Therefore, a partial quench gasification furnace which has the advantages of a quench flow and a waste boiler flow, reasonably recovers gasification high-temperature sensible heat, and is simple to operate and convenient to maintain is lacked.

Disclosure of Invention

An object of the application is to provide a gasifier of area radiation pot scrap to solve and lack one kind and have the advantage of chilling flow and pot scrap flow concurrently, rationally retrieve gasification high temperature sensible heat, and easy operation, maintain convenient problem of part chilling gasifier.

according to the embodiment of the application, a gasification furnace with a radiation waste pot is provided, which comprises a pressure-bearing shell, a combustion chamber, the radiation waste pot and a chilling chamber;

The combustion chamber, the radiation waste pot and the chilling chamber are arranged in the pressure-bearing shell;

The combustion chamber is communicated with the radiation waste boiler through a slag hole;

the top of the combustion chamber is provided with an overhead burner, the side wall of the combustion chamber is horizontally and uniformly provided with a plurality of side gasification burners, and the side wall of the combustion chamber is also provided with a combustion chamber water-cooled wall coil pipe;

the radiation waste boiler comprises a circumferential water-cooled wall tube and a radial water-cooled wall tube, wherein the circumferential water-cooled wall tube is of a cylindrical structure formed by a plurality of tube arrays, and the radial water-cooled wall tube comprises large fins and small fins; the large fins and the small fins are arranged in the circumferential water-cooled wall tube at intervals, and the number of the tubes of the large fins is larger than that of the tubes of the small fins;

The chilling chamber is communicated with the radiation waste pot, the chilling chamber comprises a space chilling chamber, a chilling chamber descending pipe and a water bath chilling chamber, and the space chilling chamber is communicated with the water bath chilling chamber through the chilling chamber descending pipe;

The upper edge of the space chilling chamber is provided with a chilling ring, and the side wall of the space chilling chamber is provided with a chilling water spray head.

further, the combustion chamber, the radiant fryer and the chilling chamber are of an integrated structure.

Furthermore, the number of the side gasification burners is 2-6, and the side gasification burners deviate from the radial direction of the combustion chamber by 0-6 degrees in the same direction.

Further, the ratio of the coal dust treatment capacity of the overhead burner to the total coal dust treatment capacity of the side gasification burner is 1-4.

Further, the ratio of the coal dust treatment capacity of the overhead burner to the total coal dust treatment capacity of the side gasification burner is 3:2 or 2: 1.

Further, the water bath chilling chamber comprises a slag pool and a chilling chamber riser pipe arranged above the slag pool;

the chilling chamber descending pipe is sleeved in the chilling chamber ascending pipe; a crude gas outlet is formed in the side wall of the water bath chilling chamber;

And a slag discharge port is arranged at the bottom of the slag pool.

according to the technical scheme, the embodiment of the application provides the gasification furnace with the radiation waste pot, which comprises a pressure-bearing shell, a combustion chamber, the radiation waste pot and a chilling chamber; the combustion chamber, the radiation waste pot and the chilling chamber are arranged in the pressure-bearing shell; the combustion chamber is communicated with the radiation waste boiler through a slag hole; the radiation waste boiler comprises a circumferential water-cooled wall tube and a radial water-cooled wall tube, wherein the circumferential water-cooled wall tube is of a cylindrical structure formed by tube arrays, and the radial water-cooled wall tube comprises large fins and small fins; the large fins and the small fins are arranged in the circumferential water-cooled wall tube at intervals, and the number of the tubes of the large fins is larger than that of the tubes of the small fins; the chilling chamber is communicated with the radiation waste pot, the chilling chamber comprises a space chilling chamber, a chilling chamber descending pipe and a water bath chilling chamber, and the space chilling chamber is communicated with the water bath chilling chamber through the chilling chamber descending pipe; the upper edge of the space chilling chamber is provided with a chilling ring, and the side wall of the space chilling chamber is provided with a chilling water spray head. The gasification sensible heat in the raw gas is recovered by utilizing the high-temperature radiation waste boiler embedded in the gasification furnace, the temperature of the raw gas is reduced to be below 1000 ℃, the raw gas is cooled to be below 300 ℃ through chilling water, then the raw gas with the lower temperature is subjected to water bath washing, ash removal and further cooling through a chilling chamber descending pipe, and finally the raw gas flows out of the gasification furnace after being subjected to gas, ash and liquid space separation again through a chilling chamber ascending pipe. The coal type gasification furnace has the advantages of wide coal type applicability, high gasification efficiency, large adjustment range of coal powder treatment capacity, high comprehensive energy utilization rate, high cleanliness of crude gas, simplicity in operation, convenience in maintenance and the like.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a gasification furnace with a radiant waste boiler according to an embodiment of the application;

Fig. 2 is a schematic structural diagram of a radiation waste boiler according to an embodiment of the present application.

Illustration of the drawings:

The method comprises the following steps of 1-pressure-bearing shell, 2-combustion chamber, 21-overhead combustor, 22-side gasification burner, 23-combustion chamber water wall coil, 3-radiation waste boiler, 31-circumferential water wall tube, 32-radial water wall tube, 321-large fin, 322-small fin, 4-chilling chamber, 41-space chilling chamber, 411-chilling ring, 412-chilling water nozzle, 42-chilling chamber descending tube, 43-water chilling chamber, 431-slag bath, 432-chilling chamber ascending tube, 433-crude gas outlet, 5-slag notch, 6-annular space cavity, 61-annular space blowing gas inlet and 7-sealing plate.

Detailed Description

Referring to fig. 1, an embodiment of the application provides a gasification furnace with a radiation waste pot, which includes a pressure-bearing housing 1, a combustion chamber 2, a radiation waste pot 3 and a chilling chamber 4;

The combustion chamber 2, the radiation waste boiler 3 and the chilling chamber 4 are arranged in the pressure-bearing shell 1;

Wherein, the gasification furnace is used for carrying out partial oxidation reaction on coal dust, pure oxygen and sub-high pressure steam in the gasification furnace under the environment of high temperature (about 1450-1650 ℃) and medium pressure (about 3.8-4.5MPa) to generate H-rich₂And CO and a small amount of CO₂、H₂The high-temperature crude gas of S simultaneously generates liquid slag. The crude gas and the liquid slag enter a radiation waste boiler 3 and a chilling chamber 4 through a slag hole 5 at the lower part of the combustion chamber 2.

the combustion chamber 2 is communicated with the radiation waste boiler 3 through a slag hole 5;

The top of the combustion chamber 2 is provided with an overhead burner 21; a plurality of side gasification burners 22 are horizontally and uniformly arranged on the side wall of the combustion chamber 2; and a combustion chamber water-cooled wall coil 23 is also arranged on the side wall of the combustion chamber 2.

the overhead burner 21 has an ignition function, while the side gasification burner 22 does not have an ignition function and is used only for conveying oxygen and pulverized coal. The top burner 21 and the side gasification burner 22 are combined to realize flexible adjustment of the load of the gasification furnace, and simultaneously contribute to the improvement of the coal dust handling capacity of the gasification furnace. The combustion chamber 2 is formed by coiling a water-cooled wall coil, and a slag layer is formed on the surface of the water-cooled wall coil in the gasification reaction process to protect the water-cooled wall coil from directly contacting high-temperature flame. The side gasification burners 22 are all located on the same horizontal plane.

the water-cooled wall coil 23 of the combustion chamber is coiled to form the combustion chamber 2, the coal and the oxygen are partially oxidized in the combustion chamber 2 to generate H-rich gas₂And CO and a small amount of CO₂、H₂The high-temperature crude gas of S simultaneously generates liquid slag. Water-cooled wall circulating water is introduced into the combustion chamber water-cooled wall coil pipe 23, partial heat is removed through flowing of the circulating water, a solid slag layer and a liquid slag layer are formed on the fire-facing surface of the combustion chamber water-cooled wall coil pipe 23, the water-cooled wall coil pipe and flame are isolated through the solid slag layer and the liquid slag layer, meanwhile, a high-temperature region of gasification reaction is limited in a cavity formed by winding the combustion chamber water-cooled wall coil pipe 23, a gasifier pressure-bearing shell is arranged on the outer side of the water-cooled wall coil pipe, and after heat is transferred through a water-cooled wall, the pressure-bearing shell can be effectively protected to work below a safe temperature.

High-temperature raw gas and liquid slag from the combustion chamber 2 enter the radiation waste boiler 3 after passing through the throat pipe. Through radiation heat exchange, the crude gas is cooled to below 1000 ℃ and then is discharged out of the radiation waste boiler 3, the high-pressure boiler feed water enters the radiation waste boiler water 3 and is heated to about 314 ℃ to form a vapor-liquid mixture, then the vapor-liquid mixture is sent out of the gasifier, the vapor is sent out of the furnace after vapor-liquid separation, and the liquid water enters the radiation waste boiler again for heating. The structural design of the water-cooled wall type dry pulverized coal gasification combustion chamber with the radiation waste boiler 3 realizes the recycling of gasification high-temperature sensible heat, and improves the overall energy efficiency of the gasification furnace.

The radiation waste boiler 3 comprises a circumferential water wall tube 31 and a radial water wall tube 32, the circumferential water wall tube 31 is a cylindrical structure formed by tube arrays, and the radial water wall tube 32 comprises large fins 321 and small fins 322; the large fins 321 and the small fins 322 are arranged in the circumferential water wall tube 31 at intervals, and the number of the tubes of the large fins 321 is greater than that of the tubes of the small fins 322;

wherein, this application increases heat transfer area through setting up circumference water wall pipe 31 and radial water wall pipe 32 mode in effective length to reduce the equipment height. The radial water wall tubes 32 are arranged at intervals through the large fins 321 and the small fins 322, so that the heat exchange area is increased, the flow cross section area of high-temperature crude gas passing through the radiation waste boiler 3 is ensured, and high-temperature liquid ash is prevented from being accumulated on the water wall tubes.

The chilling chamber 4 is communicated with the radiation waste pan 3, the chilling chamber 4 comprises a space chilling chamber 41, a chilling chamber descending pipe 42 and a water bath chilling chamber 43, and the space chilling chamber 41 is communicated with the water bath chilling chamber 43 through the chilling chamber descending pipe 42;

The cooled high-temperature crude gas and the cooled slag are discharged from the radiation waste boiler 3 and then enter a chilling chamber 4. Wherein, the washing mode of combining space quenching and water bath is favorable for improving the washing and dust removing efficiency of ash in the crude gas.

The upper edge of the spatial quench chamber 41 is provided with a quench ring 411 and the sidewall of the spatial quench chamber 41 is provided with a quench water spray 412.

wherein the quench water nozzles 412 are circumferentially equispaced around the inner wall of the spatial quench chamber 41. High-pressure chilling water is sprayed into the chilling chamber through the chilling water spray head 412, and the crude gas and the slag are chilled and cooled. The upper edge of the spatial chilling chamber 41 is provided with a chilling ring 411, and a layer of liquid film is formed on the surface of the chilling chamber descending pipe 42 through stable chilling water supply, so that the chilling chamber descending pipe 42 is protected from being burnt by high-temperature crude gas.

During operation, the pulverized coal and oxygen are conveyed to the combustion chamber 2 to be mixed, and after ignition, partial oxidation reaction is carried out to generate H-rich gas₂And CO and a small amount of CO₂、H₂The high-temperature crude gas of S simultaneously generates liquid slag. The crude gas and the liquid slag enter the radiation waste boiler 3 through a slag hole 5 at the lower part of the combustion chamber. Through radiation heat exchange, the crude gas is cooled to below 1000 ℃ and then is discharged out of the radiation waste boiler 3. Wherein the high-pressure boiler feed water in the radiation waste 3 is heated toand the mixture becomes a vapor-liquid mixture at about 310 ℃, and then is sent out of the gasification furnace, the vapor-liquid mixture is subjected to vapor-liquid separation, high-pressure steam is recycled, and the separated water enters the radiation waste boiler 3 again. The cooled high-temperature crude gas and the cooled slag are discharged from the radiation waste boiler 3 and then enter a chilling chamber 4. The cooled high-temperature crude gas and the cooled slag are firstly chilled and cooled by the chilling water spray head 412, then are bubbled in a water bath, and the cooled and washed crude gas is deflected upwards and is discharged out of the gasification furnace through the crude gas outlet 433.

The gasification sensible heat in the crude gas is recovered by utilizing the high-temperature radiation waste boiler device embedded into the gasification furnace, the temperature of the crude gas is reduced to be below 1000 ℃, the crude gas is cooled to be below 300 ℃ through chilling water, then the crude gas with lower temperature is cooled, washed in water bath and dedusted through the chilling chamber descending pipe 42, and finally the crude gas is separated from gas, ash and liquid space and flows out of the gasification furnace. The coal type gasification furnace has the advantages of wide coal type applicability, high gasification efficiency, large adjustment range of coal powder treatment capacity, high comprehensive energy utilization rate, high cleanliness of crude gas, simplicity in operation, convenience in maintenance and the like.

Further, the combustion chamber 2, the radiant fryer 3 and the chilling chamber 4 are of an integral structure. This application adopts combustion chamber 2, and 3 and 4 integrated designs of chilling chamber of radiation waste pot, and 3 low reaches of radiation waste pot directly link chilling chamber 4, help reducing gasification high temperature equipment such as high temperature connecting tube, practice thrift the cost.

Further, the number of the side gasification burners 22 is 2-6. Optionally, the number of side gasification burners 22 is 4. The side gasification burners 22 are all deviated from the radial direction of the combustion chamber 2 by 0-6 degrees in the same direction. The side-mounted gasification burner 22 forms an included angle with the radial direction of the combustion chamber 2, so that pulverized coal and oxygen enter the combustion chamber 2 to form a rotational flow field, and the heat transfer and mass transfer effects of reaction materials are enhanced.

Further, the ratio of the coal dust processing capacity of the overhead burner 21 to the total coal dust processing capacity of the side gasification burner 22 is 1-4. The control of the ratio is realized by controlling the coal powder conveying amount through the flow control valve on the coal powder pipeline, the ratio can ensure that the top-spraying burner is a main burner of the gasification furnace, and the main burner which is caused by the disturbance of the side-arranged gasification burner cannot operate disorderly in the operation process of the gasification furnace.

Further, the ratio of the coal dust treatment capacity of the overhead burner 21 to the total coal dust treatment capacity of the side gasification burner 22 is 3:2 or 2: 1. The ratio can ensure that the top-spraying burner is a main burner of the gasification furnace, and main burner operation disorder caused by disturbance of the side-arranged gasification burner can not occur in the operation process of the gasification furnace.

Preferably, the number of the side gasification burners is 2, the side gasification burners and the radial direction of the combustion chamber form an included angle of 4 degrees, and the ratio of the pulverized coal processing capacity of the overhead burner to the pulverized coal processing capacity of the side gasification burners is 2: 1. The flexible adjustment of the processing capacity of the gasification furnace and the load promotion can be realized through the arrangement of the overhead burner and the side-mounted gasification burner.

Further, the water bath quench chamber 43 comprises a slag bath 431 and a quench chamber riser 432 arranged above the slag bath 431;

The quench chamber downcomer 42 is nested within the quench chamber riser 432; a raw gas outlet 433 is formed in the side wall of the water bath chilling chamber 43;

the bottom of the slag bath 431 is provided with a slag discharge port 4311.

The chilled crude gas and solid slag are introduced into a slag pool 431 of a water bath chilling chamber 43 through a chilling chamber descending pipe 42 for water bath bubbling, the cooled and washed crude gas is deflected upwards, and is discharged out of the gasification furnace through a crude gas outlet 433 after being deflected by the top of an annular space of a chilling chamber ascending pipe 432. The solid slag is settled at the bottom of the slag pool 431 under the action of gravity, discharged through a slag discharge port 4311 and subjected to pressure reduction treatment.

further, an annular space cavity 6 is arranged between the combustion chamber 2 and the radiation waste pan 3 and the pressure-bearing shell 1, and the annular space cavity 6 is separated from the chilling chamber 4 through a sealing plate 7. The annular space cavity 6 is a cavity between the pressure-bearing shell 1 of the gasification furnace and the heated surface, and the annular space cavity 6 can reduce the heating of the pressure-bearing shell 1 and reduce the thermal stress; the radiation waste boiler 3 is also provided with an annular gap blowing gas inlet 61, the purpose of the blowing gas is to enable the pressure of the gasification furnace annular gap cavity 6 to be slightly higher than the pressure of the combustion chamber 2 and the radiation waste boiler 3 all the time, so that high-temperature crude gas and coal ash can not enter the annular gap cavity 6 through the annular gap and a balance hole of the gasification furnace, and the pressure-bearing shell 1 is heated and deposited with ash.

According to the technical scheme, the embodiment of the application provides the gasification furnace with the radiation waste pot, which comprises a pressure-bearing shell 1, a combustion chamber 2, the radiation waste pot 3 and a chilling chamber 4; the combustion chamber 2, the radiation waste boiler 3 and the chilling chamber 4 are arranged in the pressure-bearing shell; the combustion chamber 2 is communicated with the radiation waste boiler 3 through a slag hole 5; the radiation waste boiler 3 comprises a circumferential water wall tube 31 and a radial water wall tube 32, the circumferential water wall tube 31 is a cylindrical structure formed by a plurality of tube arrays, and the radial water wall tube 32 comprises large fins 321 and small fins 322; the large fins 321 and the small fins 322 are arranged in the circumferential water wall tube 31 at intervals, and the number of the tubes of the large fins 321 is greater than that of the tubes of the small fins 322; the chilling chamber 4 is communicated with the radiation waste pan 3, the chilling chamber 4 comprises a space chilling chamber 41, a chilling chamber descending pipe 42 and a water bath chilling chamber 43, and the space chilling chamber 41 is communicated with the water bath chilling chamber 43 through the chilling chamber descending pipe 42; the upper edge of the spatial quench chamber 41 is provided with a quench ring 411 and the sidewall of the spatial quench chamber 41 is provided with a quench water spray 412. The gasification sensible heat in the raw gas is recovered by utilizing the high-temperature radiation waste boiler embedded in the gasification furnace, the temperature of the raw gas is reduced to be below 1000 ℃, the raw gas is cooled to be below 300 ℃ through chilling water, then the raw gas with the lower temperature is subjected to water bath washing, ash removal and further cooling through a chilling chamber descending pipe, and finally the raw gas flows out of the gasification furnace after being subjected to gas, ash and liquid space separation again through a chilling chamber ascending pipe. The coal type gasification furnace has the advantages of wide coal type applicability, high gasification efficiency, large adjustment range of coal powder treatment capacity, high comprehensive energy utilization rate, high cleanliness of crude gas, simplicity in operation, convenience in maintenance and the like.

Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.

It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.