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Method for producing synthetic natural gas SNG from coal and processing installation thereof

A synthetic natural gas and coal gasification technology, applied in the petroleum industry, gas fuel, fuel, etc., can solve the problems of complex process, long process, high investment, etc., achieve high heat recovery rate, long service life, and increase heat transfer intensity Effect

Inactive Publication Date: 2010-07-14
SHANXI KELING ENVIRONMENT ENG DESIGN TECH
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

Its calorific value is close to that of coal gas with medium calorific value. In order to distinguish it from methane-rich natural gas with high calorific value, it is named quasi-natural gas. When using quasi-natural gas to produce hydrogen, it must be purified, and then steam reformed to produce pure hydrogen by pressure swing adsorption or membrane separation. , the patent can only supply quasi-natural gas or purify quasi-natural gas, pressure swing adsorption or membrane separation to obtain natural gas, which has the problems of complex process, long process and high investment

Method used

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  • Method for producing synthetic natural gas SNG from coal and processing installation thereof
  • Method for producing synthetic natural gas SNG from coal and processing installation thereof
  • Method for producing synthetic natural gas SNG from coal and processing installation thereof

Examples

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Embodiment 1

[0027] like figure 1 Shown, coal, steam and O 2 The crude gas is produced in a pressurized gasifier (normal pressure, 3.0Mpa, 4.0Mpa). When the crude gas undergoes sulfur-resistant conversion, the H can be adjusted. 2 , CO and CO 2 At the same time, most of the organic sulfur in the gas is converted into inorganic sulfur. When the converted gas passes through the gas purification process, the organic and inorganic sulfur are removed, so that the total sulfur in the gas is ≤0.1ppm, and part of the CO is also removed. 2 , so that the stoichiometric ratio is reached in the purified gas: In the methanation process of the purified gas, the methanation reaction is completed due to the action of the Ni-based catalyst, that is, SNG (synthetic natural gas) is generated, and CO in the methanated gas is released. 2 and H 2 The content of all ≤ 0.1% (VOL), CO content can not be measured. The heat of reaction is taken away by strong flowing water to produce medium and high pressure s...

Embodiment 2

[0029] like figure 2 Shown, coal, steam and O 2 Raw gas, raw gas and external H-rich gas are produced in a pressurized gasifier (normal pressure, 3.0Mpa, 4.0Mpa) 2 Gas (could be coke oven gas or other H 2 Gas with high content) mixed, the mixed gas should meet the stoichiometric ratio: requirements. When the mixed gas is purified, the H in the gas 2 S and organic sulfur are removed, and the purified gas must meet the requirement that its total sulfur content is ≤0.1PP. In the methanation process of the purified gas, due to the action of the Ni-based catalyst, the CO 2 , CO and H 2 Carry out methanation reaction to synthesize CNG (synthetic natural gas), and remove CO from the CNG gas in the methanation process 2 and H 2 The content of each is less than or equal to 0.1% (VOL), and the CO content cannot be measured. The heat of reaction is taken away by strong flowing water to produce medium and high pressure steam.

[0030]In addition, the SNG in this embodiment can...

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Abstract

The invention relates to a method for producing synthetic natural gas SNG from coal and a processing installation thereof. The method includes the following steps that: coal is gasified and goes through sulfur-tolerant shift, the proportion between CO, CO2 and H2 in the gas is regulated, organic sulfur is converted into inorganic sulfur, the gas is then purified to remove the sulfur and part of the CO2 in the gas, and after the components of the gas meet the following formula: the ratio of(H2-3CO)to CO2 is about 4, the gas is sent into a methanation reactor, so that the H2, the CO and the CO2are methanated to synthesize the SNG (synthetic natural gas). The installation consists of a coal gasification process, a sulfur-tolerant shift process, a purification process and a methanation process, in particular, the methanation reactor in the methanation process adopts a water-cooled tube array structure, which can quickly take away reaction heat, so that the overheat of catalyst can be prevented, the high-pressure steam in the removed heat by-product serves as power for equipment such as a compressor and a pump, consequently, the reaction heat is rationally utilized, and the produced synthetic natural gas can be directly used as fuel for urban residents or further processed into SNG and LNG. Compared with the prior reactor methanation process, the method has the advantages of shortprocess, investment saving and high heat energy utilization rate.

Description

technical field [0001] A method of producing SNG (synthetic natural gas) from coal, that is, by transforming and purifying coal gasification, and then through methanation reaction to make H 2 , CO and CO 2 Synthetic natural gas SNG. In particular, it relates to a set of chemical process equipment for realizing the above method. It belongs to the field of chemical process technology and energy development. Background technique [0002] my country is short of oil and gas resources and relatively rich in coal resources. Moderate development of coal chemical industry can not only obtain transportation fuel oil (synthetic oil) that can replace petroleum, but also can obtain basic petroleum (ethylene, propylene) chemical raw materials that can replace petroleum, and can also obtain synthetic natural gas that can replace natural gas. This is of great significance to ensure my country's energy security and sustainable economic development. [0003] With the implementation of po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L3/08
Inventor 谢克昌苗茂谦张文效乔海星赵炜上官炬王殿忠白玉祥张永发
Owner SHANXI KELING ENVIRONMENT ENG DESIGN TECH
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