Novel multi-nozzle gasification furnace coupled with biomass gasification

Abstract

The utility model relates to a novel multi-nozzle gasification furnace coupled with biomass gasification. Comprising a gasification chamber shell constructed by refractory bricks, a gasification slag opening is formed in the lower portion of the gasification chamber shell, the bottom of the gasification slag opening is communicated with a chilling chamber, a slag discharging opening is formed in the bottom of the chilling chamber, a gasification gas outlet is formed in one side of the upper portion of the chilling chamber, a downcomer communicated with the gasification slag opening is arranged in the chilling chamber, and a chilling ring is arranged at the top of the downcomer. A plurality of coal water slurry burners and biomass nozzles are arranged on the gasification chamber shell; the biomass nozzles are arranged at the top of the gasification chamber shell and / or the periphery of the gasification chamber shell; according to the invention, the biomass can replace part of coal, the characteristics of cost reduction, energy conservation and environmental protection are realized, the crushing fineness requirement of the biomass can be reduced, and the problem that the viscosity and stability of the coal water slurry are influenced is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of coal water slurry gasification furnace, specifically a new coupling biomass gasification's multi -jet gasification furnace. BACKGROUND

[0002] Coal water slurry is a new low pollution liquid coal product, and the gasification furnace is the core and key equipment of the coal water slurry gasification process, which converts cheap coal into clean coal gas, which can be used for producing chemical products, such as chemical fertilizer, methanol, dimethyl ether, etc., and can also be used in hydrogen energy field, combined cycle power generation (IGCC) and metallurgical field.

[0003] The coal water slurry gasification furnace technology is relatively mature and widely used. Biomass itself has strong water absorption and toughness. When it is mixed with coal water slurry, it needs to be finely crushed (investment in fine crushing equipment is needed) due to the high requirement for coal slurry. At the same time, due to the increase of biomass slurry viscosity or the failure to form slurry, related pipeline blockage and conveying problems may occur, resulting in the failure to blend and burn. UTILITY MODEL CONTENT

[0004] In order to make up for the above shortcomings, the utility model provides a new coupling biomass gasification's multi -jet gasification furnace to solve the technical problems existing in the prior art.

[0005] The utility model solves the technical problems by adopting the following technical scheme:

[0006] A new coupling biomass gasification's multi -jet gasification furnace, the gasification furnace includes the gasification chamber shell constructed by refractory bricks, the lower part of the gasification chamber shell is a gasification slag port, the bottom of the gasification slag port is communicated with the quenching chamber, the bottom of the quenching chamber is provided with a slag outlet, one side of the upper part of the quenching chamber is provided with a gasification gas outlet, the inside of the quenching chamber is provided with a downcomer communicated with the gasification slag port, the top of the downcomer is provided with a quenching ring, and the gasification chamber shell is provided with a plurality of coal water slurry burners and biomass nozzles.

[0007] The biomass nozzle is arranged at the top of the gasification chamber shell and / or around the gasification chamber shell.

[0008] The utility model has the advantages that the utility model discards the mixing idea of biomass and coal water slurry in the traditional technology, and uses the technical scheme that biomass and coal water slurry are fed separately and mixed in the gasification chamber shell, so that biomass replaces part of coal, cost reduction and energy saving and environmental protection are realized, the above-mentioned mode can reduce the crushing fineness requirement of biomass and avoid affecting the viscosity and stability of coal water slurry.

[0009] Preferably, when the biomass nozzle is arranged at the top of the gasification chamber shell, the biomass nozzle is installed on the central position of the top of the gasification chamber shell and vertically extends into the inside of the gasification chamber shell.

[0010] Preferably, the biomass nozzles are arranged around the gasification chamber shell, and when multiple, the biomass nozzles are arranged around the gasification chamber shell and are oppositely installed.

[0011] Preferably, the coal water slurry nozzles are arranged around the gasification chamber shell, and when multiple, the coal water slurry nozzles are arranged around the gasification chamber shell and are oppositely installed.

[0012] Preferably, the biomass nozzles and the coal water slurry nozzles around the gasification chamber shell are all arranged downwardly inclined.

[0013] Preferably, the angle between the nozzle axis and the horizontal line is 1-30°.

[0014] Preferably, the biomass nozzle is a four-channel nozzle, and the four-channel nozzle is sequentially provided with a first combustion-supporting gasification agent channel, a biomass feeding channel, a gasification water channel and a second gas combustion-supporting agent channel from inside to outside.

[0015] Preferably, the central nozzle of the first combustion-supporting gasification agent channel is retracted to the biomass nozzle to form a premixing zone relative to the inner side wall of the outlet of the biomass feeding channel.

[0016] Preferably, the outer contraction angle a of the central nozzle of the first combustion-supporting gasification agent channel is 70-85°, the outer contraction angle b of the central nozzle of the biomass feeding channel is 60-75°, the outer contraction angle c of the central nozzle of the gasification water channel is 50-65°, the outer contraction angle d of the central nozzle of the second gas combustion-supporting agent channel is 30-50°, and a>b>c>d.

[0017] The utility model has the following advantages:

[0018] 1. The utility model discloses the traditional technical thought, makes water coal slurry and biomass separately enter the gasification chamber shell and carry out the mixing combustion, thereby realizes the energy saving and emission reduction and the cost reduction feature under the premise of replacing part of coal with biomass, further, can reduce the processing requirement to biomass, and avoid the influence water coal slurry's performance.

[0019] 2. As known to all, the ash content in biomass is high, and the quality is light, and when burning or after burning, it will move upward, causing the technical problem of low gasification efficiency;The utility model makes the biomass nozzle and the coal water slurry nozzle all be arranged downwardly inclined, and the above-mentioned setting can increase the time of biomass rising (that is, increase the residence time of biomass in the gasification chamber shell), thereby achieving the feature of improving the gasification efficiency.

[0020] 3. As is well known, biomass is prone to producing tar and bridging, which affects the gasification of coal-water slurry and the continuous production process. This utility model, by setting up opposing installations, enables the coal and biomass to be fully mixed and burned. During the combustion process, the weight of the coal is used to break the bridging phenomenon, and the coal slag after combustion is used to adsorb the tar produced by the biomass, thereby achieving complete gasification of biomass and reducing the impact of biomass combustion on the gasification of coal-water slurry and the continuous production process.

[0021] 4. This utility model also provides a specific structure for the biomass nozzle. By setting a gasification water channel, the biomass feed can be cooled, and at the same time, water vapor can be added to the gasifier.

[0022] 5. The biomass nozzle in this utility model contains a premixing zone, which enables the combustion aid and biomass to be fully mixed, laying the foundation for full combustion in the gasifier; furthermore, by setting the matching angle (outer contraction angle), it is possible to prevent biomass from burning or carbonizing in the pipeline, and to make oxygen and biomass mix more evenly with water vapor, so that gasification combustion is more complete. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Fig. 1 This is a schematic diagram of the structure of this utility model;

[0025] Fig. 2 This is a schematic diagram of the structure of the biomass nozzle of this utility model.

[0026] In the diagram: 1. Refractory brick; 2. Gasification chamber shell; 3. Gasification slag inlet; 4. Quenching chamber; 5. Slag outlet; 6. Gasification gas outlet; 7. Downcomer; 8. Quenching ring; 9. Coal-water slurry burner; 10. Biomass burner; 11. First combustion aid channel; 12. Biomass feed channel; 13. Gasification water channel; 14. Second combustion aid channel; 15. Premixing zone. Detailed Implementation

[0027] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described, obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0028] The following will be described in detail with reference to the drawings of the embodiments of the present application. Figs. 1-2 Further detailed description of the present application, the present application is a kind of novel coupling biomass gasification multi-nozzle gasifier, the gasification furnace includes by refractory brick 1 The gasification chamber shell 2, the lower part of the gasification chamber shell 2 is gasification slag port 3, the bottom of the gasification slag port 3 is communicated with quenching chamber 4, the bottom of quenching chamber 4 is provided with lower slag port 5, one side of the upper part of quenching chamber 4 is provided with gasification gas outlet 6, the inside of quenching chamber 4 is provided with the descending pipe 7 communicated with gasification slag port 3, the top of the descending pipe 7 is provided with quenching ring 8, the gasification chamber shell 2 is provided with a plurality of water-coal slurry burner 9 and biomass nozzle 10;The biomass nozzle 10 is arranged at the top of the gasification chamber shell 2 and / or the periphery of the gasification chamber shell 2.The present application is provided with biomass burner 10 and water-coal slurry burner 9, biomass and coal slurry are respectively fed, to prevent the problem of blockage caused by the increase of coal slurry viscosity when mixed, thereby improving the stability of the device;The form of biomass feeding alone has lower requirements on biomass particle size, and can solve the problem of biomass grinding.The above structure can be modified without changing the structure of the gasification furnace, water-coal slurry burner 9 and the like, and the biomass nozzle 10 is added to ensure the stability of the original equipment mechanism and realize the characteristics of not changing the original equipment operation.Further, the above design can realize the replacement of part of the coal by biomass, to achieve the advantages of cost reduction and environmental protection and energy saving.

[0029] Further, when the biomass nozzle 10 is arranged at the top of the gasification chamber shell 2, the biomass nozzle 10 is installed at the central position of the top of the gasification chamber shell 2 and vertically extends into the inside of the gasification chamber shell 2.The above arrangement can make the running track of biomass downward, to prolong the rising time of biomass (i.e., increase the residence time of biomass in the gasification chamber shell);At the same time, the material or combustion flame is prevented from being sprayed onto the refractory brick or water-cooled wall, thereby playing the role of protecting the gasification chamber shell 2 and prolonging the service life of the burner.

[0030] Further, the biomass nozzles 10 are arranged around the gasification chamber shell 2, and when there are multiple, the biomass nozzles 10 are arranged around the gasification chamber shell 2 and are oppositely installed. Through the above arrangement, the combustion during the spraying process can be realized, not only the material or the combustion flame is avoided to be sprayed on the refractory bricks or the water-cooled wall, thereby the gasification chamber shell 2 is protected and the service life of the burner is prolonged, and the full combustion of the material and the purpose of improving the gasification efficiency are realized.

[0031] Further, the biomass nozzles 10 are arranged around the gasification chamber shell 2, and when there are multiple, the biomass nozzles 10 are arranged around the gasification chamber shell 2 and are oppositely installed. Through the above arrangement, the combustion during the spraying process can be realized, not only the material or the combustion flame is avoided to be sprayed on the refractory bricks or the water-cooled wall, thereby the gasification chamber shell 2 is protected and the service life of the burner is prolonged, and the full combustion of the material and the purpose of improving the gasification efficiency are realized.

[0032] Further, the biomass nozzles 10 and the coal slurry burners 9 around the gasification chamber shell 2 are arranged to be inclined downward. Through the above arrangement, the material or the combustion flame of the process burner is avoided to be sprayed on the opposite refractory bricks or the water-cooled wall, thereby the shell is protected and the service life of the burner is prolonged, the residence time of the fuel is increased, the gasification efficiency is improved, the coal and the biomass are fully mixed and combusted, the bridge phenomenon is destroyed by the weight of the coal during the combustion, the tar generated by the biomass is adsorbed by the coal slag after the combustion, thereby the complete gasification of the biomass is realized, and the influence of the biomass combustion on the continuous process of the coal slurry gasification and production is reduced.

[0033] Further, the angle between the burner axis and the horizontal line is 1-30°.

[0034] Further, the biomass nozzle 10 is a four-channel burner, and the four-channel burner is sequentially provided with a first combustion-supporting gasification agent channel 11, a biomass feeding channel 12, a gasification water channel 13 and a second gas combustion-supporting gasification agent channel 14 from inside to outside. In the utility model, the material flowing into the first combustion-supporting gasification agent channel 11 and the second gas combustion-supporting gasification agent channel 14 is preferably liquid oxygen, the biomass raw material (the biomass raw material after being crushed, without being finely ground) in the biomass feeding channel 12 is preferably conveyed by using inert gas, and the material in the gasification water channel 13 is desalted water. The liquid oxygen is mixed with the biomass raw material to improve the combustion efficiency, the gasification water channel 13 is arranged to reduce the temperature of the burner, avoid the combustion or carbonization of the biomass in the pipeline, and realize the characteristics of supplementing water vapor.

[0035] Further, the center nozzle of the first combustion-supporting gas passage 11 is retracted to the biomass nozzle 10 relative to the inner side wall of the outlet of the biomass feeding passage 12 to form a premixing zone 15. By setting the premixing zone 15, sufficient mixing between the first combustion-supporting gas and the biomass can be provided, and meanwhile, the problem of carbonization or combustion of the biomass material in the front end of the biomass feeding passage 12 due to the excessively high temperature of the end of the biomass feeding passage 12 can be avoided.

[0036] Further, the outer retraction angle a of the center nozzle of the first combustion-supporting gas passage 11 is 70-85°, the outer retraction angle b of the center nozzle of the biomass feeding passage 12 is 60-75°, the outer retraction angle c of the center nozzle of the gasification water passage 13 is 50-65°, and the outer retraction angle d of the center nozzle of the second combustion-supporting gas passage 14 is 30-50°, and a > b > c > d. By the above setting, the oxygen and the biomass can be more uniformly mixed with the water vapor, and the gasification combustion can be more sufficient. Further, the water vapor can be sprayed from the gasification water passage during the combustion process, which can lower the internal temperature of the burner and enhance the purpose of the gasification reaction.

[0037] The working principle of the utility model is as follows: when the gasification furnace starts to run, the water coal slurry burner 9 starts to run after the temperature of the gasification furnace reaches the feeding temperature, the oxygen and the coal slurry in the water coal slurry burner 9 are introduced into the gasification chamber shell 2 to complete the initial feeding process, after the temperature and pressure of the initial feeding in the gasification chamber shell 2 are stable, the biomass feeding is carried out through the biomass nozzle 10, under the joint action of the water coal slurry burners 9 and the biomass nozzle 10, the materials sprayed from all the burners collide in the gasification chamber shell 2 to form a rotating downward flow state, then the materials enter the quenching chamber 4 through the gasification slag port 3 and the quenching ring 8, and the gas slag separation is realized under the action of the downcomer 7, the coal gas enters the next section from the gasification gas outlet 6, and the slag is discharged and collected through the slag outlet 5; the above process can realize the biomass mixed gasification, and the water absorption and toughness of the biomass can be avoided, so that the problems in the biomass crushing and pulping process can be avoided; further, the feeding process of the biomass nozzle 10 is as follows: the biomass powder or particles are transported by the biomass feeding passage 12 using inert gas, the external oxygen pipeline is transported through the first combustion-supporting gas passage 11 and the second combustion-supporting gas passage 14 respectively, the desalted water is transported to the gasification water passage 13 through a pump, and the four materials are simultaneously introduced into the gasification chamber shell 2 to burn; the four materials are dispersed through the corresponding passages, so that the oxygen and the biomass can be more uniformly mixed with the water vapor, and the gasification combustion can be more sufficient; further, the water vapor can be sprayed from the gasification water passage during the combustion process, which can lower the internal temperature of the burner and enhance the purpose of the gasification reaction.

[0038] The basic principle, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. A new type of multi-nozzle gasifier coupled with biomass gasification, comprising a gasification chamber shell (2) constructed by refractory bricks (1), the lower part of the gasification chamber shell (2) is a gasification slag port (3), the bottom of the gasification slag port (3) is communicated with a quenching chamber (4), the bottom of the quenching chamber (4) is provided with a slag outlet (5), one side of the upper part of the quenching chamber (4) is provided with a gasification gas outlet (6), the inside of the quenching chamber (4) is provided with a downcomer (7) communicated with the gasification slag port (3), the top of the downcomer (7) is provided with a quenching ring (8), characterized in that: The gasification chamber shell (2) is provided with a plurality of water-coal slurry burners (9) and biomass nozzles (10). The biomass nozzles (10) are arranged on the top of the gasification chamber shell (2) and / or around the gasification chamber shell (2).

2. A novel multi-burner gasifier coupled with biomass gasification according to claim 1, characterized in that: When the biomass nozzles (10) are arranged on the top of the gasification chamber shell (2), the biomass nozzles (10) are installed on the top center of the gasification chamber shell (2) and vertically extend into the gasification chamber shell (2).

3. A novel multi-burner gasifier coupled with biomass gasification according to claim 2, characterized in that: When the biomass nozzles (10) are arranged around the gasification chamber shell (2), the biomass nozzles (10) are arranged around the gasification chamber shell (2) and are oppositely installed.

4. A novel multi-burner gasifier coupled with biomass gasification according to claim 1, characterized in that: When the water-coal slurry burners (9) are arranged around the gasification chamber shell (2), the water-coal slurry burners (9) are arranged around the gasification chamber shell (2) and are oppositely installed.

5. A novel multi-nozzle gasifier coupled with biomass gasification as claimed in claim 1, wherein: The biomass nozzles (10) and the water-coal slurry burners (9) around the gasification chamber shell (2) are all arranged downwardly and obliquely.

6. A novel multi-burner gasifier coupled with biomass gasification according to claim 5, characterized in that: The included angle between the burner axis and the horizontal line is 1-30°.

7. A novel multi-burner gasifier coupled with biomass gasification according to any one of claims 1-6, characterized in that: The biomass nozzle (10) is a four-channel burner, and the four-channel burner comprises, from inside to outside, a first combustion-supporting gasification agent channel (11), a biomass feeding channel (12), a gasification water channel (13) and a second gas combustion-supporting agent channel (14).

8. A novel multi-burner gasifier coupled with biomass gasification according to claim 7, characterized in that: The central nozzle of the first combustion-supporting gasification agent channel (11) is retracted to the inside of the biomass nozzle (10) relative to the inner side wall of the outlet of the biomass feeding channel (12) to form a premixing zone (15).

9. A novel multi-burner gasifier coupled with biomass gasification according to claim 7, characterized in that: The outer contraction angle a of the central nozzle of the first combustion-supporting gasification agent channel (11) is 70-85°. The outer contraction angle b of the central nozzle of the biomass feeding channel (12) is 60-75°. The outer contraction angle c of the central nozzle of the gasification water channel (13) is 50-65°. The outer contraction angle d of the central nozzle of the second gas combustion-supporting agent channel (14) is 30-50°. The object a > b > c > d.

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