Method for producing coal-based natural gas through crushed coal pressurized gasification combined with water-coal slurry gasification

A technology of pressurized gasification of crushed coal and coal-to-natural gas, applied in the gasification of granular/powdered fuel, gas fuel, petroleum industry, etc., can solve the problems of high-concentration phenol-containing process wastewater, and achieve the goal of reducing the cost of sewage treatment Effect

Active Publication Date: 2014-08-27
XINJIANG LONGYU ENERGY HUAIDONG COAL CHEM IND
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for producing coal-to-natural gas by pressurized gasification of crushed coal combined with coal-water slurry gasification, and at the same time solve the problem of the balance of lump coal in supporting coal mines and the problem of high-concentration phenol-containing process wastewater in production

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  • Method for producing coal-based natural gas through crushed coal pressurized gasification combined with water-coal slurry gasification

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Embodiment 1

[0034] Such as figure 1 As shown, the method for producing coal-to-natural gas by pressurized gasification of crushed coal combined with coal-water slurry gasification according to the present invention, the specific process steps are as follows:

[0035] 1. After the raw coal is crushed and screened, it is divided into 6~50mm lump coal and <6mm fine coal, which are sent to the crushed coal pressurized gasification device, coal-water slurry gasification device and boiler respectively by the belt conveyor.

[0036] 2. 6~50mm lump coal is gasified in the crushed coal pressurized gasifier, the gasification agent is medium pressure steam and oxygen, and the volume ratio of medium pressure steam and oxygen is 6~8:1. The 180°C, 3.8MPa crude gas leaving the gasifier is converted into CO, H 2 、CH 4 、H 2 O and CO 2 as the main component, and CnHm, N 2 , sulfide, tar, naphtha, phenols and ammonia and other impurities.

[0037] 3. The crushed coal is pressurized and gasified and th...

Embodiment 2

[0051] As shown in the figure, the method for producing coal-to-natural gas by pressurized gasification of crushed coal combined with coal-water slurry gasification according to the present invention, the specific process steps are as follows:

[0052] 1. After the raw coal is crushed and screened, it is divided into 6~50mm lump coal and <6mm fine coal, which are sent to the crushed coal pressurized gasification device, coal-water slurry gasification device and boiler respectively by the belt conveyor.

[0053] 2. 6~50mm lump coal is gasified in a crushed coal pressurized gasifier, the gasification agent is medium pressure steam and oxygen, and the volume ratio of medium pressure steam and oxygen is 6:1. The 180°C, 3.8MPa crude gas leaving the gasifier is converted into CO, H 2 、CH 4 、H 2 O and CO 2 as the main component, and CnHm, N 2 , sulfide, tar, naphtha, phenols and ammonia and other impurities.

[0054] 3. The crushed coal is pressurized and gasified, and the crude...

Embodiment 3

[0068] Such as figure 1 As shown, the method for producing coal-to-natural gas by pressurized gasification of crushed coal combined with coal-water slurry gasification according to the present invention, the specific process steps are as follows:

[0069] 1. After the raw coal is crushed and screened, it is divided into 6~50mm lump coal and <6mm fine coal, which are sent to the crushed coal pressurized gasification device, coal-water slurry gasification device and boiler respectively by the belt conveyor.

[0070] 2. 6~50mm lump coal is gasified in a crushed coal pressurized gasifier, the gasification agent is medium pressure steam and oxygen, and the volume ratio of medium pressure steam and oxygen is 7:1. The 180°C, 3.8MPa crude gas leaving the gasifier is converted into CO, H 2 、CH 4 、H 2 O and CO 2 as the main component, and CnHm, N 2 , sulfide, tar, naphtha, phenols and ammonia and other impurities.

[0071] 3. The crushed coal is pressurized and gasified and the cr...

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Abstract

The invention discloses a method for producing coal-based natural gas through crushed coal pressurized gasification combined with water-coal slurry gasification. The problems of the equilibrium of block and slack coal and high-concentration phenolic wastewater in the process of producing coal-based natural gas through crushed coal pressurized gasification technology can be effectively solved. Block coal is used as raw materials for a crushed coal pressurized gasification furnace, slack coal is used as raw materials for a water-coal slurry gasification furnace and a project supporting boiler, and the equilibrium problem of the block and slack coal of a supporting coal mine is solved. After membrane separation is performed on waste water produced by crushed coal pressurized gasification, fresh water is recycled, and concentrated water is used as water-coal slurry gasification pulping water; through the high-temperature gasification process in the water-coal slurry gasification furnace, organic pollutants in the concentrated water are gasified and decomposed, crushed coal pressurized gasification technology sewage which is difficult to treat is converted into water-coal slurry gasification sewage which is easy to treat, and sewage treatment cost is greatly reduced.

Description

technical field [0001] The invention belongs to the fields of energy chemical industry and sewage treatment, and relates to the production of coal-based natural gas by pressurized gasification of crushed coal combined with gasification of coal-water slurry, and specifically relates to the balance of lump coal in gasification raw materials and sewage treatment of the pressurized gasification process of crushed coal question. Background technique [0002] The production of coal-to-natural gas by using the crushed coal pressurized gasification process has the advantages of high energy efficiency and many by-products, but the crushed coal pressurized gasification technology itself has two problems: the balance of lump coal and the generation of high-concentration phenol-containing wastewater. First of all, the crushed coal pressurized gasification process belongs to fixed bed gasification, and the raw coal is required to be 6~50mm lump coal. With the continuous improvement of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L3/08C10J3/48
Inventor 韩玉峰冯华马剑飞丁建础
Owner XINJIANG LONGYU ENERGY HUAIDONG COAL CHEM IND
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