CN110396434A - Slag gasifier structure and gasifier system - Google Patents

Abstract

The present invention provides a kind of slag gasification furnace structure and gasified boiler systems, belong to coal gasification apparatus field, the slag gasification furnace structure includes: furnace body, the bottom of furnace body is provided with molten slag bath, the molten slag bath has the first protrusion, the overhead height of first protrusion is higher than the bottom of pond of the molten slag bath, is provided with slag-drip opening at the top of first protrusion；Since the height of slag-drip opening in molten slag bath is higher than the height of bottom of pond, it is gathered in the cinder fallen from top to bottom in furnace body in molten slag bath, melt under hot environment in furnace is liquid, after liquid cinder reaches the height of the first protrusion, it is expelled to outside furnace body by slag-drip opening, avoids the situation that slag-drip opening generates blocking；Gasified boiler system includes above-mentioned slag gasification furnace structure, has the advantages that slag gasification furnace structure.

Description

Slag gasifier structure and gasifier system

technical field

The invention relates to the field of coal gasification equipment, in particular to a slag gasification furnace structure and a gasification furnace system.

Background technique

Coal gasifier is an atmospheric fixed bed coal gasification equipment. The raw material is usually anthracite or coke. Its characteristic is that it can be connected with gasification agent in different operation modes to produce air gas, semi-water gas or water gas. The gasification agent can be Enter the furnace from the bottom or top, and the generated gas is drawn out from the top or bottom accordingly. During the process of making gas, a large amount of waste coal slag is produced.

The slag outlet at the bottom of the current gasifier is in the form of a funnel. After the pulverized coal reacts, the coal slag flows downward through the membrane wall and flows into the water seal through the funnel-type slag outlet. However, during use, the coal slag Due to incomplete melting inside the gasifier, it will accumulate and block the slagging outlet, which will affect the normal use of the gasifier.

Contents of the invention

The object of the present invention is to provide a slag gasifier structure, which solves the problem that the slag outlet in the form of a funnel is easily blocked and affects the use of the gasifier in the prior art.

Based on the above purpose, the slag gasifier structure provided by the present invention includes:

Furnace body, the bottom of the furnace body is provided with a molten slag pool, the molten slag pool has a first protrusion, the height of the top of the first protrusion is higher than the bottom of the molten slag pool, the A slag discharge port is provided on the top of the first protrusion.

In the above technical solution, since the height of the slag outlet in the slag pool is higher than that of the bottom of the pool, the coal slag falling from top to bottom in the furnace gathers in the slag pool and melts into a liquid state under the high temperature environment in the furnace. After the liquid coal slag reaches the height of the top of the first protrusion, it is discharged to the outside of the furnace body through the slag discharge port, thereby avoiding the clogging of the slag discharge port.

Further, the first protruding part is gradually raised from the periphery to the middle part, and the slag discharge port is arranged in the middle part of the first protruding part;

Further, the inner wall of the furnace body adopts a water-cooled wall, the inner wall of the upper region of the furnace body is provided with a high-temperature resistant coating, and the inner wall of the lower region of the furnace body and the slag pool are provided with refractory bricks.

Further, including slag discharge pipeline and water sealing device;

The slag discharge pipeline communicates with the slag discharge port of the molten slag pool to discharge molten slag;

The water sealing device communicates with the outlet of the slag discharge pipeline for storing and cooling the slag discharged from the slag discharge pipeline.

Further, a plurality of nozzles communicating with the furnace cavity of the furnace body are provided on the periphery of the furnace body, and the axes of the nozzles are tangent to the furnace wall of the furnace body.

A gasification furnace system provided by the present invention includes an auxiliary furnace body and the above-mentioned slag gasification furnace structure;

One side of the auxiliary furnace body communicates with one side of the furnace body through an exhaust pipe, so that gas enters the auxiliary furnace body along the horizontal direction.

Further, the gas enters the auxiliary furnace body along the horizontal tangent direction of the furnace wall of the auxiliary furnace body.

Further, the bottom of the auxiliary furnace body is provided with an auxiliary slag pool, and the auxiliary slag pool has a second protrusion, and the height of the top of the second protrusion is higher than that of the auxiliary slag pool bottom, and the top of the second protruding part is provided with a secondary slag outlet.

Further, the second protruding part is in a gradually raised shape from the periphery to the middle part, and the auxiliary slag discharge port is arranged in the middle part of the second protruding part.

Further, the gasifier system includes an auxiliary slagging pipeline and an auxiliary water sealing gas device;

The auxiliary slag discharge pipeline communicates with the auxiliary slag discharge port of the auxiliary slag pool to discharge molten slag;

The auxiliary water sealing device communicates with the outlet of the auxiliary slag discharge pipeline, and is used for storing and cooling the slag discharged from the auxiliary slag discharge pipeline.

Further, refractory bricks are arranged on the inner wall of the lower area of the auxiliary furnace body, the auxiliary slag pool and the inner wall of the exhaust pipe.

Further, the bottom of the auxiliary furnace body is inclined, so that the slag can return to the slag pool of the furnace body through the bottom of the auxiliary furnace body and the exhaust pipe in sequence.

Further, the gasifier system includes a first auxiliary slagging pipeline and a first auxiliary water sealing device;

The bottom of the auxiliary furnace body is provided with a first auxiliary slag outlet;

The bottom of the exhaust pipe is inclined, so that slag can enter the molten slag pool from the bottom of the exhaust pipe;

The first auxiliary slag discharge pipe communicates with the first auxiliary slag discharge port for discharging slag;

The first auxiliary water sealing device communicates with the outlet of the first auxiliary slag discharge pipeline, and is used for storing and cooling the slag discharged from the first auxiliary slag discharge pipeline.

Further, the inner wall of the lower region of the auxiliary furnace body and the bottom of the auxiliary furnace body are provided with refractory bricks.

Further, the gasifier system includes a waste heat boiler, and the waste heat boiler communicates with the auxiliary furnace body.

Further, the gasifier system includes a dust filtering device and a pulverizing system, the dust filtering device communicates with the exhaust port of the waste heat boiler, and the dust filtered by the dust filtering device is returned to the pulverizing system through a pipeline , the pulverizing system is used to feed reaction raw materials into the furnace body.

A gasification furnace system provided by the present invention includes a front furnace body and the above-mentioned slag gasification furnace structure;

One side of the front furnace body communicates with one side of the furnace body through an exhaust pipe, so that the gas enters the furnace body along the horizontal direction from the front furnace body.

Further, the bottom of the front furnace body is inclined, so that slag can enter the slag pool of the furnace body through the bottom of the front furnace body and the exhaust pipe in sequence.

The slag gasifier structure provided by the invention has the following technical effects:

A molten slag pool is provided at the bottom of the furnace body, the molten slag pool has a first protruding part, the height of the top of the first protruding part is higher than the bottom of the molten slag pool, and the top of the first protruding part is provided with a slag discharge port ; Because the height of the slag outlet in the slag pool is higher than the bottom of the pool, the coal slag falling from top to bottom in the furnace body gathers in the slag pool, and melts into a liquid state under the high temperature environment in the furnace, and the liquid coal slag reaches the first convex After reaching the height of the top of the part, it is discharged to the outside of the furnace body through the slag discharge port, which avoids the clogging of the slag discharge port.

Description of drawings

In order to more clearly illustrate the specific implementation of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings that need to be used in the specific implementation or description of the prior art. Obviously, the accompanying drawings in the following description The drawings show some implementations of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative work.

Fig. 1 is a schematic diagram of the structure of a slag gasifier provided in Embodiment 1 of the present invention;

Fig. 2 is the first structural schematic diagram of the gasifier system provided by Embodiment 2 of the present invention;

Fig. 3 is a top view of the connection between the furnace body and the auxiliary furnace body in the gasifier system provided by Embodiment 2 of the present invention;

Fig. 4 is a second structural schematic diagram of the gasifier system provided in Embodiment 2 of the present invention;

Fig. 5 is a third structural schematic diagram of the gasifier system provided in Embodiment 2 of the present invention;

Fig. 6 is a schematic structural diagram of the gasifier system provided by Embodiment 3 of the present invention.

Icon: 10-front furnace body; 100-furnace body; 110-slag pool; 111-first protrusion; 120-slag discharge port; 130-high temperature resistant coating; 140-refractory brick; Pipeline; 300-water sealing gas device; 400-nozzle; 500-auxiliary furnace body; 510-auxiliary slag pool; Slag discharge pipeline; 710-first auxiliary slag discharge pipeline; 800-secondary water sealing gas device; 810-first auxiliary water sealing gas device; 900-waste heat boiler; 910-dust filter device; 920-milling system.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, or in a specific orientation. construction and operation, therefore, should not be construed as limiting the invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

Embodiment one

As shown in Figure 1, the slag gasifier structure provided by the present invention includes:

The furnace body 100, the bottom of the furnace body 100 is provided with a molten slag pool 110, the molten slag pool 110 has a first protruding portion, the height of the top of the first protruding portion 111 is higher than the bottom of the molten slag pool 110, the first protruding The top of the part 111 is provided with a slag outlet 120 for discharging coal slag.

In this technical solution, since the height of the slag outlet 120 in the slag pool 110 is higher than the bottom of the pool, the coal slag falling from top to bottom in the furnace body 100 gathers in the slag pool 110. After melting into a liquid state, the liquid coal slag reaches the top height of the first protruding portion 111 and is discharged to the outside of the furnace body 100 through the slag discharge port 120 , avoiding the clogging of the slag discharge port 120 .

In the technical solution of the present application, the shape of the first protruding part 111 is gradually raised from the periphery to the middle, and the slag discharge port 120 is arranged in the middle part of the first protruding part 111, so that the slag discharge port 120 is located in the molten slag pool A high of 110.

In application, since the slag outlet 120 has a certain height, the coal slag is melted in the slag pool 110 and then discharged out of the furnace body 100 through the slag outlet 120 .

In the technical solution of the present application, the inner wall of the furnace body 100 adopts a water-cooled wall, and the inner wall of the upper region of the furnace body 100 is provided with a high-temperature resistant coating 130, and the inner wall of the lower region of the furnace body 100 and the slag pool 110 are provided with refractory bricks. 140. Preferably, in this embodiment, silicon carbide coating is used for the high temperature resistant coating, and refractory bricks 140 are placed in the slag pool 110 to protect the inner wall of the furnace body 100 and keep the inner space of the furnace body 100 warm.

In the technical solution of the present application, the structure of the slag gasifier also includes a slag discharge pipeline 200 and a water sealing device 300;

The slag discharge pipeline 200 communicates with the slag discharge port 120 of the slag pool 110, and the slag discharge pipeline 200 plays the role of transporting coal slag, and then discharges the molten slag;

The water-blocking gas device 300 communicates with the outlet of the slag discharge pipeline 200 to store the slag discharged from the slag discharge pipeline 200. The water-blocking gas device 300 plays the role of cooling the coal slag and storing the coal slag; at the same time, the melted coal slag enters the After the water seal is quenched and broken, it falls into the water seal.

In the technical solution of the present application, a plurality of nozzles 400 communicating with the furnace cavity of the furnace body are provided on the periphery of the furnace body 100, and the axes of the nozzles 400 are tangent to the furnace wall of the furnace body.

In application, a plurality of nozzles 400 are evenly distributed around the furnace body 100 , and the function of the nozzles 400 is to inject reaction materials such as coal powder, water vapor, and carbon dioxide into the furnace body 100 .

In addition, the axis of the nozzle 400 is tangent to the furnace wall, and the reaction raw materials are sprayed tangentially into the furnace body 100, so that the reaction raw materials are mixed more evenly, thereby improving the reaction efficiency and achieving the purpose of fully utilizing the raw materials.

Embodiment two

As shown in Figure 2 and Figure 3, the embodiment of the present invention also provides a gasifier system, including an auxiliary furnace body 500 and the slag gasifier structure in the first embodiment above;

Since the structure of the slag gasifier has been described in the first embodiment, the structure of the slag gasifier in this embodiment may refer to the scheme described in the first embodiment.

One side of the auxiliary furnace body 500 communicates with one side of the furnace body 100 through an exhaust pipe 600 , and the exhaust pipe 600 is arranged horizontally so that gas can enter the auxiliary furnace body 500 along the horizontal direction. Preferably, the nozzle of the exhaust pipe 600 is tangent to the furnace wall of the auxiliary furnace body 500, so that the gas enters the auxiliary furnace body 500 along the horizontal tangent direction of the inner wall of the auxiliary furnace body 500, and the auxiliary furnace body 500 is used to receive the reacted The gas and the coal slag and fly ash discharged through the furnace body 100 are separated and then discharged to the outside of the auxiliary furnace body 500 .

The bottom of the auxiliary furnace body 500 is provided with an auxiliary slag pool 510, the auxiliary slag pool 510 has a second protruding portion 511, the height of the top of the second protruding portion 511 is higher than the bottom of the auxiliary slag pool 510, the second The top of the protruding portion 511 is provided with a secondary slag outlet 520 .

By setting the auxiliary furnace body 500, it plays the role of re-separating coal slag and fly ash;

And, because the height of the auxiliary slag outlet 520 in the auxiliary slag pool 510 in the auxiliary slag pool 510 is higher than the bottom of the pool, the coal slag falling from top to bottom in the auxiliary furnace body 500 gathers in the auxiliary slag pool 510 , melts into a liquid state under the high temperature environment in the attached furnace body, and the liquid coal slag reaches the height of the second protrusion 511 and is discharged to the outside of the auxiliary furnace body 500 through the auxiliary slag discharge port 520, avoiding the blockage of the auxiliary slag discharge port 520 .

In the technical solution of the present application, the second protruding portion 511 is gradually raised from the periphery to the middle, and the auxiliary slag discharge port 520 is arranged in the middle of the second protruding portion 511 .

By designing the structure of the second protrusion 511, the auxiliary slag outlet 520 has a certain height, so that the coal slag is melted in the auxiliary slag pool 510 and then discharged to the outside of the auxiliary furnace body 500 through the auxiliary slag outlet 520, and then the coal slag And fly ash reprocessing.

In addition, the outlet of the exhaust pipe 600 communicates with the tangential direction of the auxiliary furnace body 500, so that the coal slag and fly ash form a spiral flow in the auxiliary furnace body 500, and fully contact with the furnace wall, so that the coal slag and fly ash are discharged. Falling into the auxiliary slag pool 510 , it melts into a liquid state in the high temperature environment in the auxiliary furnace body 500 , and the liquid cinder reaches a corresponding height and is discharged to the outside of the auxiliary furnace body 500 through the auxiliary slag discharge port 520 .

In the embodiment of the present application, the gasifier system also includes a secondary slag discharge pipeline 700 and a secondary water sealing gas device 800;

The auxiliary slag discharge pipe 700 communicates with the auxiliary slag discharge port 520 of the auxiliary slag pool 510 to discharge the molten slag;

The auxiliary water sealing device 800 communicates with the outlet of the auxiliary slag discharge pipeline 700 to store and cool the slag discharged from the auxiliary slag discharge pipeline 700 .

In the embodiment of the present application, the auxiliary slag discharge pipeline 700 plays the role of transporting coal slag;

The auxiliary water sealing device 800 plays the role of cooling and storing coal cinders.

In addition, a gas relief valve may also be provided on the auxiliary slagging pipeline 700 to relieve the pressure of the gasifier system.

In the embodiment of the present application, the gasifier system includes a waste heat boiler 900 , and the waste heat boiler 900 communicates with the auxiliary furnace body 500 .

Waste heat boiler 900 refers to a boiler that uses the waste heat in waste gas, waste materials or waste liquid in various industrial processes and the heat generated by the combustion of combustible substances to heat water to a certain working medium. Oil-fired boilers, gas-fired boilers, and coal-fired boilers with smoke boxes and flue waste heat recovery are also called waste heat boilers. Waste heat boilers can produce hot water or steam for use in other sections through waste heat recovery.

Gas and coal are burned to produce high-temperature flue gas to release heat. The high-temperature flue gas first enters the furnace, then enters the waste heat recovery device of the front smoke box, then enters the pyrotechnic tube, and finally enters the waste heat recovery device in the flue of the rear smoke box. It becomes low-temperature flue gas and is discharged into the atmosphere through the exhaust port. Since the waste heat boiler greatly improves the utilization rate of the heat released by fuel combustion, this kind of boiler is very energy-saving.

In the technical solution of the present application, by setting the waste heat boiler 900, the heat in the gasification furnace can be rationally utilized.

In the technical solution of the present application, refractory bricks 140 are arranged on the inner wall of the lower area of the auxiliary furnace body 500 and the auxiliary slag pool 510;

It should be noted here that, according to the needs of use, the auxiliary furnace body 500 can also adopt other structures:

Referring to Fig. 4, for example, the bottom of the auxiliary furnace body 500 is closed, and the bottom of the auxiliary furnace body 500 is arranged in an inclined shape, so that the slag in the auxiliary furnace body 500 can pass through the inclined bottom of the auxiliary furnace body 500, exhaust The pipeline 600 returns to the slag pool 110 of the furnace body 100 , and then the slag is melted again in the slag pool 110 to form slag, which is finally discharged through the slag outlet 120 .

5, for example, the bottom of the exhaust pipe 600 is inclined, so that slag can naturally enter the slag pool 110 from the bottom of the exhaust pipe 600;

A first auxiliary slag outlet is provided at the bottom of the auxiliary furnace body 500;

The gasifier system includes a first auxiliary slag discharge pipeline 710 and a first auxiliary water sealing device 810;

The first secondary slag discharge pipe 710 communicates with the first secondary slag discharge port for discharging slag;

The first secondary water sealing device 810 communicates with the outlet of the first secondary slag discharge pipeline 710 for storing and cooling the slag discharged from the first secondary slag discharge pipeline 710 .

Refractory bricks 140 are respectively arranged on the inner wall of the lower area of the auxiliary furnace body 500 , the bottom of the auxiliary furnace body 500 and the inner wall of the first auxiliary slag discharge pipe 710 .

In the technical solution of this application, the gasifier system further includes a dust filter device 910 and a pulverization system 920, the dust filter device 910 communicates with the discharge port of the waste heat boiler 900, the pulverization system 920 communicates with the dust filter device 910 through a pipeline, and at the same time, It also communicates with the corresponding nozzle 400 through the pipeline, and the dust filtered by the dust filter device 910 is returned to the pulverizing system 920 through the pipeline, and the pulverizing system 920 is used to feed the reaction raw materials into the furnace body 100 .

In the above technical solution, the dust filtering device 910 is used to filter the dust in the exhaust gas of the waste heat boiler 900, and the dust is returned to the furnace body 100 through the pulverizing system 920 for reuse, thereby protecting the environment from pollution.

Preferably, the dust filtering device 910 includes a bag filter. The cloth bag filter has the advantages of high filtration precision, large processing capacity, low cost, convenient and fast operation and maintenance, complete specifications, various materials, and wide application range.

Embodiment Three

This embodiment provides another gasifier system. Referring to FIG. 6, the gasifier system includes a front furnace body 10 and the slag gasifier structure provided in Embodiment 1;

One side of the front furnace body 10 communicates with one side of the furnace body 100 through an exhaust pipe 600 , so that gas enters the furnace body 100 from the front furnace body 10 along the horizontal direction.

The bottom of the front furnace body 10 is set in an inclined shape, so that the slag can enter the slag pool 110 of the furnace body 100 through the bottom of the front furnace body 10 and the exhaust pipe 600 in sequence.

Adopting the gasifier system provided by the embodiment of the present application has the following advantages:

1. In the slag pool 110 at the bottom of the furnace body 100, the height of the slag outlet 120 is higher than the height of the bottom of the slag pool 110, so that the coal slag falling from top to bottom in the furnace body 100 gathers in the slag pool 110 , melts into a liquid state in the high temperature environment in the furnace, and the liquid cinder reaches the height of the first protrusion 111 and is discharged to the outside of the furnace body 100 through the slag discharge port 120, thereby avoiding the clogging of the slag discharge port 120.

2. A plurality of nozzles 400 communicating with the furnace cavity of the furnace body are arranged on the peripheral side of the furnace body 100, and the axes of the nozzles 400 are tangent to the furnace wall. The reaction raw materials are sprayed tangentially into the furnace body 100, so that the reaction raw materials are mixed more uniformly, thereby improving the reaction efficiency.

3. By setting the auxiliary furnace body 500, the coal slag and fly ash are separated again; and, since the height of the auxiliary slag discharge port 520 in the auxiliary slag pool 510 is higher than the bottom of the pool, the auxiliary furnace body 500 is automatically The coal slag falling from top to bottom gathers in the auxiliary slag pool 510 and melts into a liquid state under the high temperature environment in the furnace. The liquid coal slag reaches the height of the second protrusion 511 and is discharged to the auxiliary furnace body 500 through the auxiliary slag discharge port 520 Externally, the situation that the secondary slag outlet 520 is blocked is avoided.

4. The dust filter device 910 is used to filter the dust substances in the exhaust gas of the waste heat boiler 900, thereby protecting the environment from pollution.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. scope.

Claims (18)

1. a kind of slag gasification furnace structure characterized by comprising

Furnace body, the bottom of the furnace body are provided with molten slag bath, and the molten slag bath has the first protrusion, first protrusion Overhead height is higher than the bottom of pond of the molten slag bath, is provided with slag-drip opening at the top of first protrusion.

2. slag gasification furnace structure according to claim 1, which is characterized in that first protrusion is by surrounding to middle part In gradually crowned, the middle part of first protrusion is arranged in the slag-drip opening.

3. slag gasification furnace structure according to claim 1, which is characterized in that the inner wall of the furnace body uses water-cooling wall, The inner wall in furnace body internal upper part region is provided with high-temperaure coating, the inner wall of lower area and molten slag bath setting in the furnace body There is refractory brick.

4. slag gasification furnace structure according to claim 1 or 2, which is characterized in that further include Residue extraction pipeline and water seal lock Device of air；

The Residue extraction pipeline is connected to the slag-drip opening of the molten slag bath, the clinker of thawing is discharged；

The outlet of the water seal air-lock device and the Residue extraction pipeline, to store and cool down the Residue extraction pipeline discharge Clinker.

5. slag gasification furnace structure according to claim 1 or 2, which is characterized in that the side setting of the furnace body is multiple The nozzle being connected to the furnace chamber of the furnace body, the axis of the nozzle and the furnace wall of the furnace body are tangent.

6. a kind of gasified boiler system, which is characterized in that including secondary furnace body and according to claim 1 described in any one of -5 Slag gasification furnace structure；

The side of the pair furnace body is connected to the side of the furnace body by exhaust pipe, and gas is made to enter secondary furnace in the horizontal direction In vivo.

7. gasified boiler system according to claim 6, which is characterized in that horizontal cutting of the gas along the furnace wall of the secondary furnace body Line direction enters in the secondary furnace body.

8. gasified boiler system according to claim 6, which is characterized in that the bottom of the pair furnace body is provided with secondary slag Pond, the pair molten slag bath have the second protrusion, and the overhead height of second protrusion is higher than the bottom of pond of the secondary molten slag bath, Secondary slag-drip opening is provided at the top of second protrusion.

9. gasified boiler system according to claim 8, which is characterized in that second protrusion by surrounding to middle part be in by The middle part of second protrusion is arranged in gradually crowned, the pair slag-drip opening.

10. gasified boiler system according to claim 9, which is characterized in that the gasified boiler system includes secondary Residue extraction pipeline With secondary water seal air-lock device；

The pair Residue extraction pipeline is connected to the secondary slag-drip opening of the secondary molten slag bath, the clinker of thawing is discharged；

The outlet of the pair water seal air-lock device and the secondary Residue extraction pipeline, to store and cool down the secondary Residue extraction pipeline The clinker of discharge.

11. gasified boiler system according to claim 8, which is characterized in that the inner wall of lower area, institute in the pair furnace body The inner wall for stating secondary molten slag bath and the exhaust pipe is provided with refractory brick.

12. gasified boiler system according to claim 6, which is characterized in that the bottom of the pair furnace body is set as skewed, Bottom of the clinker successively through the secondary furnace body, the exhaust pipe is set to be back in the molten slag bath of the furnace body.

13. gasified boiler system according to claim 6, which is characterized in that the gasified boiler system includes the first secondary deslagging Pipeline and the first secondary water seal air-lock device；

The bottom of the pair furnace body is provided with the first secondary slag-drip opening；

The bottom of the exhaust pipe is oblique, and clinker is enable to be entered in the molten slag bath by the bottom of exhaust pipe；

Described first secondary Residue extraction pipeline is connected to the described first secondary slag-drip opening, clinker is discharged；

The outlet of the first secondary water seal air-lock device and the first secondary Residue extraction pipeline, to store and cool down described the The clinker of one secondary Residue extraction pipeline discharge.

14. gasified boiler system according to claim 13, which is characterized in that it is described pair furnace body in lower area inner wall and The bottom of the pair furnace body is provided with refractory brick.

15. the gasified boiler system according to any one of claim 6-14, which is characterized in that the gasified boiler system packet Waste heat boiler is included, the waste heat boiler is connected to the secondary furnace body.

16. gasified boiler system according to claim 15, which is characterized in that the gasified boiler system includes dust-filtering dress It sets and pulverized coal preparation system, the dust filtering device is connected to the discharge outlet of the waste heat boiler, also, pass through dust filtering device The dust of filtering is back in pulverized coal preparation system by pipeline, and the pulverized coal preparation system is for being passed through reaction raw materials into furnace body.

17. a kind of gasified boiler system, which is characterized in that including preposition furnace body and according to claim 1 any one of -5 institute The slag gasification furnace structure stated；

The side of the preposition furnace body is connected to the side of the furnace body by exhaust pipe, makes gas by the preposition furnace body edge Horizontal direction enters in furnace body.

18. gasified boiler system according to claim 17, which is characterized in that the bottom of the preposition furnace body is set as tilting Shape enables bottom of the clinker successively through the preposition furnace body, the exhaust pipe to enter in the molten slag bath of the furnace body.