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

A coal-to-natural gas and methanol-synthesizing technology, which is applied in the chemical industry and can solve the problems that coal gasification equipment cannot fully function and cannot produce other products

Active Publication Date: 2014-04-09
EAST CHINA UNIV OF SCI & TECH
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  • Description
  • Claims
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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 present invention involves the field of chemical technology. Specifically, it is a preparation method for adjusting the peak of coal -made natural gas by synthesizing methanol. Background technique [0002] In my country's large and medium cities, the use of pipeline gas is very common.The pipeline gas includes natural gas, liquefied natural gas and coal -to -natural gas.With the development of urbanization, the supply of gas will become a bottleneck.In addition to strengthening the needs of gas in the future, 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 natural gas for coal -to -system is also a feasible way.my country is a large coal country with rich coal resources. It produces natural gas with coal as raw materials. It can be used as a replacement or supplement to natural gas and liquefied natural gas, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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