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Preparation method for peak regulation of coal-based natural gas through methyl alcohol synthesis

A technology for producing natural gas from coal and synthesizing methanol, which is applied in the chemical industry and can solve the problems of inability to produce other products and the inability of coal gasification equipment to fully function.

Active Publication Date: 2013-03-20
EAST CHINA UNIV OF SCI & TECH
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AI Technical Summary

Problems solved by technology

The traditional coal-to-natural gas process uses coal gasification to directly produce coal-to-natural gas, and other products cannot be produced in the process
In this way, coal gasification equipment cannot fully function due to the peaks and valleys in the supply of coal-to-natural gas

Method used

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  • Preparation method for peak regulation of coal-based natural gas through methyl alcohol synthesis

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Embodiment 1

[0024] A preparation method for peak regulation of coal-to-natural gas by synthesizing methanol, comprising the following steps:

[0025] (1) The purified gas produced by coal gasification is sent to the heat exchanger for heat exchange through the compressor in the compression cycle section. The purified gas after heat exchange first enters the desulfurization reactor for desulfurization, and then enters the deoxidation reactor Deoxygenation to obtain synthesis gas.

[0026] (2) The cycle gas from the methanol separator is sent to the heat exchanger for heat exchange after being pressurized by the compressor in the compression cycle section.

[0027] or

[0028] The synthesis gas after deoxygenation in step (1) and the cycle gas after heat exchange in step (2) are mixed in the synthesis system and sent to the methanol synthesis tower for the reaction of preparing methanol.

[0029] (4) In the methanol synthesis tower, the mixture of synthesis gas and cycle gas passes throug...

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Abstract

The invention discloses a preparation method for peak regulation of coal-based natural gas through methyl alcohol synthesis. The preparation method comprises the steps of: 1, gasifying coal to obtain purified gas; 2, pressurizing recycle gas and then carrying out heat exchange; 3, mixing the purified gas with the recycle gas and then sending the mixed gas to a methanation reaction system to generate the coal-based natural gas, or sending the mixed gas to a methyl alcohol synthetic reactor for preparing methyl alcohol; 4, synthesizing a reaction mixture in the methyl alcohol synthetic reactor; 5, sending the reaction mixture to a methyl alcohol separator for separating a liquid phase, methyl alcohol purge gas and the recycle gas; 6, sending the liquid phase and a methyl alcohol washing solution derived from a water scrubber to a flash tank to generate crude methyl alcohol, and sending the crude methyl alcohol to a methyl alcohol rectifying tower; and 7, producing a methyl alcohol product by the methyl alcohol rectifying tower, or separating the crude methyl alcohol into the methyl alcohol purge gas, scrubbing the methyl alcohol purge gas by the water scrubber and then sending into the methanation reaction system for generating the coal-based natural gas. According to the invention, a methyl alcohol synthesis section is set on a coal-based natural gas device, and the coal-based natural gas is subjected to peak regulation through methyl alcohol synthesis to ensure that the coal-based natural gas device plays a better role.

Description

Technical field [0001] The invention relates to the technical field of chemical engineering, and specifically relates to a preparation method for peak-shaving coal-to-natural gas by synthesizing methanol. Background technique [0002] In large and medium-sized cities in my country, the use of pipeline gas has become very common. The pipeline gas includes natural gas, liquefied natural gas and coal-based natural gas. With the development of urbanization, the supply of gas will become a bottleneck problem. To solve the future demand for coal gas, in addition to strengthening my country's natural gas exploration and development and increasing the purchase of pipeline natural gas and liquefied natural gas from abroad, the development of coal-to-natural gas is also a realistic and feasible way. Our country is a big coal country with relatively abundant coal resources. The production of natural gas from coal can be used as a substitute or supplement for natural gas and liquefied...

Claims

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Application Information

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IPC IPC(8): C10L3/08C07C31/04C07C29/151
Inventor 应卫勇张海涛马宏方李涛钱炜鑫曹发海房鼎业
Owner EAST CHINA UNIV OF SCI & TECH
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