Synthesis process of natural gas employing methanation of coke oven gas

A coke oven gas and natural gas technology, which is applied in the petroleum industry, gas fuel, fuel, etc., can solve the problems of high energy consumption, large investment, and increased cost of synthetic natural gas, and achieve low energy consumption, improved energy utilization, and easy operation. Convenient, stable and easy-to-control effects

Active Publication Date: 2010-02-17
SHANDONG TIEXIONG METALLURGICAL TECH CO LTD +2
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Problems solved by technology

[0015] The above-mentioned technologies are all developed on the basis of multi-stage methanation (three-stage and more than three-stage methanation) technology. Due to the large investment in multi-stage methanation reaction equipment and high energy consumption, the cost of synthetic natural gas has increased

Method used

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  • Synthesis process of natural gas employing methanation of coke oven gas

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Embodiment 1

[0044] Such as figure 1 The coke oven gas methanation method shown to synthesize natural gas, coke oven gas 50000Nm 3 / h, compressed by a screw compressor to a reaction pressure of 0.3-0.49MPa, and then treated by absorption to remove ammonia, aromatics, tar and dust, and then enter medium-temperature hydrolysis to hydrolyze organic sulfur into H 2 S, then use wet desulfurization, and finally use dry fine desulfurization process to remove trace H 2 S, get pure coke oven gas. At this time, the composition of pure coke oven gas is H 2 : 54.4%, CH 4 : 28.2%, CO: 6.3%, CO 2 : 4.0%, N 2 : 3.1%, C m h n : 2.1%, total sulfur ≤0.1mg / Nm 3 , tar≤0.5mg / Nm 3 , Aromatics≤30mg / Nm 3 .

[0045] After the pure coke oven gas is preheated to 300°C, water steam is added. The amount of water steam added is 20% of the pure coke oven gas. After mixing, it enters the first-stage methanation reactor. Under the action of the methanation catalyst produced by Chemical Technology Co., Ltd., th...

Embodiment 2

[0050] Such as figure 1 The coke oven gas methanation method to synthesize natural gas shown, coke oven gas 20000Nm 3 / h, compressed by a reciprocating compressor to a reaction pressure of 0.5-0.8MPa, and then treated by adsorption to remove ammonia, aromatics, tar and dust, and then enter medium-temperature hydrolysis to hydrolyze organic sulfur into H 2 S, then use wet desulfurization, and finally use dry fine desulfurization process to remove trace H 2 S, get pure coke oven gas. At this time, the composition of pure coke oven gas is H 2 : 56.5%, CH 4 : 25.0%, CO: 5.9%, CO 2 : 2.8%, N 2 : 5.0%, C m h n : 3.0%, total sulfur ≤ 0.1mg / Nm 3 , tar≤0.5mg / Nm 3 , Aromatics≤30mg / Nm 3 .

[0051] After the pure coke oven gas is preheated to 250°C, water steam is added. The amount of water steam added is 30% of the pure coke oven gas, and it enters the first-stage methanation reactor with a reaction pressure of 0.5-0.8MPa. Under the action of the methanation catalyst produced...

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Abstract

The invention relates to a comprehensive utilization synthesis process of natural gas employing methanation of coke oven gas, belonging to the technical field of new energy utilization. The process comprises the following steps: compressing coke oven gas, preliminary cleaning, removing sulfur, performing first section methanation, performing second section methanation and separating natural gas toprepare natural gas which reaches the grade A technological requirements of natural gas national standard (GB17820-1999). The synthesis process of natural gas employing methanation of coke oven gas reaches the aim of high effective comprehensive utilization of natural gas and provides a new way of preparing and synthesizing natural gas.

Description

technical field [0001] The invention relates to a process for comprehensive utilization of coke oven gas methanation to synthesize natural gas, and belongs to the technical field of new energy utilization. Background technique [0002] Natural gas is a clean and efficient energy source. my country's energy development "Eleventh Five-Year Plan" proposes that the proportion of natural gas in total primary energy consumption will increase by 2.5 percentage points within five years, reaching 5.3% by 2010. [0003] In recent years, although my country's natural gas production has increased rapidly, and a large number of natural gas pipeline networks and infrastructure have been built, the demand for natural gas has increased even faster. It is estimated that in 2010, about 21 billion m 3 . As the demand for natural gas continues to increase, various technologies for synthesizing artificial natural gas have emerged, such as coal-based natural gas (SNG), but in terms of economy an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L3/08
Inventor 王清涛娄肖杰刘金刚王俊昌丁心悦刘振峰杜霞茹黄吉荣
Owner SHANDONG TIEXIONG METALLURGICAL TECH CO LTD
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