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Loop-free complete methanation integrated process and system

A complete methanation, integrated system technology, applied in the petroleum industry, gas fuel, fuel, etc., to achieve the effect of prolonging the service life, not easy to deposit carbon, and simplifying the operation process

Pending Publication Date: 2018-11-09
WUHUAN ENG
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore so far, there is no relatively complete technical means to solve the above technical problems

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  • Loop-free complete methanation integrated process and system
  • Loop-free complete methanation integrated process and system
  • Loop-free complete methanation integrated process and system

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Embodiment Construction

[0028] The system of the present invention will be further explained below in conjunction with the accompanying drawings:

[0029]The non-circulating complete methanation integrated system of the present invention comprises a first-stage shift reaction unit R101, a shift gas-liquid separation tank S101, a second-stage shift reaction unit R102, a sulfur-resistant methanation reaction unit R301, and a first purification unit connected in sequence; A101 and Multi-stage methanation reaction unit, the multi-stage methanation reaction unit includes multi-stage high-temperature methanation reaction units R301, R302, R303, R304 connected in series and multi-stage low-temperature methanation reaction units R305, R306, R307, wherein, this implementation In the example, the methanation gas-liquid separation tank S102 and the product gas-liquid separation tank S103 are connected in series before and after the low-temperature methanation reaction unit R307 to realize gas-liquid separation; ...

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Abstract

The invention discloses a loop-free complete methanation integrated process and system. According to the technical scheme, the process comprises the following steps: dividing crude coal gas which is subjected to oil removal and dust removal into two streams, carrying out conversion, sulfur-resistant methanation reaction and purification on one stream, so as to obtain reaction gas with methane dry-base content of 10mol%-20mol%, introducing the reaction gas into a multi-stage methanation reaction unit, and carrying out methanation, so as to obtain synthetic natural gas with methane dry-base content over 95mol%; and purifying the other stream of crude coal gas so as to obtain purified gas, dividing the purified gas into multiple streams, respectively mixing the multiple streams into the reaction gas at an inlet of the multi-stage methanation reaction unit so as to participate in subsequent methanation unit. The process is simple, easy to operate, low in production cost and high in methaneconcentration, and the circulation of product gas is avoided; and the system is simple in structure, easy to control, low in operation cost and suitable for large-scale methanation production.

Description

technical field [0001] The invention relates to a methanation process and system. Background technique [0002] my country's energy structure is characterized by "rich coal, poor oil, and little gas", and as a major coal producer and consumer, it is urgent to find a clean, efficient, and cost-effective conversion and utilization method. After years of exploration and reference to domestic and foreign experience, the development of clean coal utilization methods such as coal-to-gas can not only realize the clean utilization of coal resources, reduce environmental pollution, but also reduce the dependence of natural gas on foreign countries and ensure my country's energy security. [0003] In the traditional coal-to-natural gas process, the crude gas first undergoes a shift reaction to adjust the hydrogen-carbon molar ratio between 3.0-3.05, and then enters the methanation unit for methanation reaction. The reaction principle is as follows: [0004] [0005] [0006] T...

Claims

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Application Information

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IPC IPC(8): C10L3/08
CPCC10L3/08Y02P20/10
Inventor 张大洲卢文新陈风敬徐建民夏吴刘佳王志刚商宽祥
Owner WUHUAN ENG
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