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Method for producing coal-to-natural gas by pressurized gasification of pulverized coal combined with coal-water slurry gasification

A technology of pressurized gasification of pulverized coal and coal to natural gas, which is applied in the gasification of granular/powdered fuel, gas fuel, petroleum industry, etc. It 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: 2016-02-10
XINJIANG LONGYU ENERGY HUAIDONG COAL CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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-to-natural gas by pressurized gasification of pulverized coal combined with coal-water slurry gasification

Examples

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Effect test

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-to-natural gas by pressurized gasification of crushed coal combined with coal-water slurry gasification, which can effectively solve the problem of fast fine coal balance and high-concentration containing Phenol wastewater problem. The pulverized coal pressurized gasifier uses lump coal as raw material, and the coal-water slurry gasifier and the supporting boiler of the project use fine coal as raw material, which solves the problem of lump coal balance in supporting coal mines. After the waste water produced by the pressurized gasification of crushed coal is separated by membrane, the fresh water is reused, and the concentrated water is used as water for coal-water slurry gasification and pulping. The high-temperature gasification process of the coal-water slurry gasifier is used to make the organic pollutants in the concentrated water Gasification decomposition converts the difficult-to-treat waste water of the crushed coal pressurized gasification process into easier-to-handle coal-water slurry gasification waste water, which greatly reduces the cost of sewage treatment.

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 Patents(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