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Production technology of natural gas or liquefied natural gas

A technology of liquefied natural gas and production process, applied in the petroleum industry, gas fuel, fuel and other directions, can solve the problems of complex process, high energy consumption and high investment, and achieve the effect of simple process, simple process and reasonable energy utilization

Active Publication Date: 2015-07-08
青岛联信催化材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, synthetic natural gas is a non-sulphur-resistant methanation production process after hydrogen sulfide is removed by wet method (low temperature methanol washing, etc.), and there are defects such as hot and cold diseases in the process, complicated process, high investment and energy consumption, etc.

Method used

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  • Production technology of natural gas or liquefied natural gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The first level of sulfur resistance-methanation: coke oven gas and Lurgi mixed gas with a CO dry basis content of 20% first enters the detoxification tank to remove dust and other impurities, and then exchanges heat with the gas after the first-level methanation reaction to 450°C, enter the first reactor for the first-stage sulfur-tolerant methanation reaction, the hot spot temperature of the first-stage reactor bed is 630°C, the reaction pressure is 2.5MPa, and the dry basis content of CO in the outlet gas of the first-stage reactor is 13.1%; CH 4 Dry basis content 15.2%.

[0033] The gas after the primary methanation is heat-exchanged with the inlet gas of the first-stage reactor, and the temperature of the medium-pressure steam produced by the waste pot is lowered to 560°C and enters the second-stage reactor for sulfur-resistant methanation reaction. The second-stage reaction The hot spot temperature of the reactor bed is 600°C, the dry content of CO at the outlet ...

Embodiment 2

[0038] First-level sulfur resistance-methanation: Coke oven gas and Lurgi mixed gas with a CO dry content of 13.5% first enter the detoxification tank to remove dust and other impurities, and then exchange heat with the gas after the first-level methanation reaction. 400°C, enter the first reactor for the first-stage sulfur-resistant methanation reaction, the hot spot temperature of the first-stage reactor bed is 670°C, the reaction pressure is 2.5MPa, and the dry basis content of CO in the outlet gas of the first-stage reactor is 8.2 %; CH4 dry basis content 18.9%.

[0039] After recovering high-pressure superheated steam from the waste boiler, the gas from the first stage exchanges heat with the inlet gas and further recovers the heat through boiler feed water and other devices. Enter the pressure swing adsorption unit to absorb CO 2 , the hydrogen sulfide in the gas is removed to 0.1PPm, CO 2 The content is less than 0.5%.

[0040] The gas after desulfurization and decar...

Embodiment 3

[0043] The first level of sulfur resistance-methanation: coke oven gas and Lurgi mixed gas with a CO dry basis content of 23% first enters the detoxification tank to remove dust and other impurities, and then exchanges heat with the gas after the first-level methanation reaction to 410°C, enter the first reactor for the first-stage sulfur-tolerant methanation reaction, the hot spot temperature of the first-stage reactor bed is 660°C, the reaction pressure is 3.2MPa, and the dry basis content of CO in the outlet gas of the first-stage reactor is 15.7%; CH 4 Dry basis content 16.1%.

[0044] The gas after the first-stage methanation exchanges heat with the inlet gas of the first-stage reactor, and is cooled to 530°C by the medium-pressure steam produced by the waste pot, and enters the second-stage reactor for sulfur-resistant methanation reaction. The second-stage reaction The hot spot temperature of the reactor bed is 600°C, the dry basis content of CO at the outlet of the se...

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Abstract

The invention provides a technology for preparing natural gas or liquefied natural gas from Lurgi and coke oven gas mixture. The technology comprises at least a first-stage multifunctional catalytic reaction, and parts of sulfur-tolerant shift conversion and sulfur-tolerant methanation reactions and an organic sulfur hydrogenation conversion reaction are carried out in the multifunctional reaction; a gas from a multifunctional reactor undergoes heat exchange and high pressure superheated steam recovery, undergoes selective oxidation to remove hydrogen sulfide, undergoes transformation adsorption to remove carbon dioxide, and enters a sulfur-intolerant methanation reactor (heat insulation or isothermal reaction) to undergo a CO methanation reaction, and a gas from the outlet of the sulfur-intolerant methanation reactor is finished natural gas or is sent o a low temperature cold box to liquefy methanol in order to form liquefied natural gas, wherein the CO content is smaller than 0.1%, the CO2 content is smaller than 0.5%, and the CH4 content is greater than 97%.

Description

technical field [0001] The invention provides a production process of natural gas or liquefied natural gas, in particular, provides a fully dry production process for producing natural gas or liquefied natural gas by using Lurgi coke oven mixed gas as a raw material. Background technique [0002] Coal, oil and natural gas are the three pillars of energy in the world today. my country is poor in oil and gas, but rich in coal resources. In recent years, with the rapid development of the national economy, natural gas, as a clean and efficient energy source, has rapidly increased its proportion in energy consumption. At present, the domestic demand for natural gas far exceeds the supply. Therefore, coal-to-natural gas technology can not only It meets the growing market demand, and is of great significance to my country's energy security, energy conservation and emission reduction. [0003] In the prior art, synthetic natural gas is a non-sulfur-tolerant methanation production pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L3/08
Inventor 纵秋云刘博男高辉古黎明荆宏健
Owner 青岛联信催化材料有限公司
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