Equipment for producing natural gas by coal

A coal-to-natural gas and equipment technology, applied in the field of new energy, can solve the problems of many cost and safety factors and high cost, and achieve the effect of ensuring cost and safety and continuous process

Active Publication Date: 2013-06-19
XINJIANG QINGHUA ENERGY GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the purchased pure hydrogen is gaseous hydrogen, which requires special tank trucks for shipment, and external temporary non-standard equipment is required for reduction, which involves many cost and safety factors
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Method used

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  • Equipment for producing natural gas by coal

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0014] According to the hydrogen production equipment disclosed in the present invention, the process of coal-to-natural gas is specifically:

[0015] The raw coal is processed by the coal preparation unit (1) and then enters the gasification furnace (2). Steam and air-separated oxygen are injected from the lower part of the gasification furnace (2) as gasification agents. The coal is injected into the gasification furnace (2). In countercurrent contact with the gasification agent, the raw coal is dried, retorted, gasified and oxidized to generate crude coal gas. Crude gas includes: hydrogen, carbon monoxide, carbon dioxide, methane, oxygen, nitrogen, hydrogen sulfide, oil and higher hydrocarbons. The purity of the oxygen is 99.5 vol% to 99.8 vol%, and the pressure of the steam is preferably 1.0 MPa to 10.0 MPa, more preferably 4.8 MPa. In the process of producing hydrogen, the volume ratio of the steam to the oxygen is preferably (5.5-5.8):1.

[0016] The auxiliary line is close...

Example Embodiment

[0022] Example 1

[0023] After the raw coal of the pitkou coal mine is processed by the coal preparation unit (1), it is sent to the gasification furnace (2) through the coal lock; steam and oxygen after air separation treatment are injected from the lower part of the gasification furnace (2) as gasification agents, The volume ratio of steam to oxygen is 5.5:1; the raw coal and the gasification agent are in countercurrent contact in the gasifier (2). After the raw coal is dried, retorted, gasified and oxidized, raw coal gas is obtained. The raw gas contains 0.22vol% O 2 , 0.19vol% N 2 , 9.76vol% CH 4 , 12.32vol% CO, 34.99vol% CO 2 , 41.65vol% H 2 , 0.15vol% H 2 S and 0.72vol% C n H m ; Close the auxiliary line and enter the crude gas into the conversion unit (3) to convert all the carbon monoxide in it into hydrogen, and the obtained crude gas enters the first absorption tower (4) to absorb the impurity gas in the crude gas with methanol as the absorbent, and The temperature ...

Example Embodiment

[0025] Example 2

[0026] After being processed by the coal preparation unit (1), the raw coal of the Kengkou coal mine is sent to a gasifier (2) through the coal lock, and the other three gasifiers are shut down; steam and air-separated oxygen are used as gasification agents from the gas Into the lower part of the chemical furnace (2), the volume ratio of steam to oxygen is 5.8:1; the raw coal and the gasification agent are in countercurrent contact in the gasification furnace, and the raw coal is dried, retorted, gasified and oxidized to obtain crude gas. The gas contains 0.35vol% O 2 , 0.40vol% of N 2 , 10.0vol% CH 4 , 17.0vol% CO, 32.0vol% CO 2 , 38.7vol% H 2 , 0.10vol% H 2 S and 1.45vol% C n H m ; Close the auxiliary line, enter the crude gas into the conversion unit (3) to convert all the carbon monoxide in it into hydrogen, and enter the obtained crude gas into the first absorption tower (4) to absorb the impurity gas in the crude gas with methanol as the absorbent. And...

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Abstract

The invention provides equipment for producing natural gas by coal. The equipment comprises a coal preparation unit, a gasification furnace, a subline, a conversion unit, a first absorption tower, a second absorption tower and a methanation unit, wherein the outlet of the coal preparation unit is connected with the inlet of the gasification furnace, and the outlet of the gasification furnace is connected with the inlet of the conversion unit; the outlet of the conversion unit is connected with the inlet of the first absorption tower, and the outlet of the first absorption tower is connected with the inlet of the second absorption tower; the outlet of the second absorption tower is connected with the inlet of the methanation unit, and the outlet of the gasification furnace is connected with the inlet of the subline; the outlet of the subline is connected with the inlet of the first absorption tower; and the absorbent of the first and second absorption towers is methanol. Since hydrogen is firstly prepared in the production equipment for producing natural gas by coal, hydrogen can be prepared in the coal produced natural gas and the cost and safety of hydrogen can be guaranteed.

Description

technical field [0001] The invention relates to the technical field of new energy, in particular to a coal-to-natural gas equipment. Background technique [0002] Natural gas is a clean energy with safe use and high calorific value. Its main component is methane. Compared with coal of the same quality, the CO emitted by burning 2 It is only 40% of coal, and there is no waste water and waste residue. Therefore, natural gas is widely used in power generation, chemical industry, city gas, automobile fuel and other industries, and is one of the main clean energy sources in the world. At present, the most important ways to obtain natural gas are integrated gas fields, refinery gas, shale gas, gas drainage and coal-to-natural gas; coal-to-natural gas uses coal as raw material, which is gasified to generate synthesis gas, which is purified and transformed Under the action of a catalyst, a methanation reaction occurs to synthesize natural gas. Coal-to-natural gas technology can b...

Claims

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Application Information

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IPC IPC(8): C10L3/08
Inventor 孟令江赵守国王大庆刘金国王先延鲍喜军赵泽秀张忠平
Owner XINJIANG QINGHUA ENERGY GROUP
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