A process for producing civil gas using coke oven and methanation process

A technology for methanation and coke oven gas is applied in the field of effectively utilizing production waste gas and cheap coke to produce new energy gas, which can solve the problem of high methane production cost, and achieve the effects of reducing coke oven fuel cost, improving thermal efficiency and reducing environmental pollution.

Active Publication Date: 2022-02-15
杨皓
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, methanol is already a high value-added product, and the cost of methane production in this process is relatively high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1 In a certain 800,000-ton coke plant, the composition of all coke oven gas after desulfurization, dephosphorization, deheavy hydrocarbons and heavy metals is as follows:

[0021] Component o 2 +N 2 +A r

H 2

CH 4

CO+CO 2

C 2 +

(V / V) 0.04 0.58 0.26 0.10 0.02

[0022] The total gas volume is 50000Nm 3 / h.

[0023] The gas is directly used to synthesize civil gas raw material 1.

[0024] The 3.5MPa steam generated in the methanation process is decompressed to 0.3MPa for power generation, and enters the fixed-bed continuous gasifier with coke and pure oxygen to produce hydrogen and carbon monoxide, and the gas is directly used to synthesize civil gas raw material 2. The specific components are as follows:

[0025] Component o 2 +N 2 +A r

H 2

CH 4

CO+CO 2

C 2 +

(V / V) 0.01 0.56 0.02 0.41 0.02

[0026] The total gas volume is 11000Nm 3 / h.

[0027] After purific...

Embodiment 2

[0035] Example 2 For a 400,000-ton coke plant, the composition of all coke oven gas after desulfurization, dephosphorization, deheavy hydrocarbons and heavy metals is as follows:

[0036] Component o 2 +N 2 +A r

H 2

CH 4

CO+CO 2

C 2 +

(V / V) 0.04 0.58 0.26 0.10 0.02

[0037] The total gas volume is 25000Nm 3 / h.

[0038] The gas is directly used to synthesize civil gas raw material 1.

[0039] The 3.5MPa steam generated in the methanation process is decompressed to 0.3MPa for power generation, and enters the fixed-bed continuous gasifier with coke and pure oxygen to produce hydrogen and carbon monoxide, and the gas is directly used to synthesize civil gas raw material 2. The specific components are as follows:

[0040] Component o 2 +N 2 +A r

H 2

CH 4

CO+CO 2

C 2 +

(V / V) 0.01 0.56 0.02 0.41 0.02

[0041] The total gas volume is 5500Nm 3 / h.

[0042] After purification of...

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PUM

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Abstract

The invention relates to a process for producing civil fuel gas by using coke oven and methanation process. The coke oven gas produced in the coke production process is used as the raw material for synthesizing methane, and the 3.5 MPa steam generated by the methanation process is reduced to 0.3 After MPa, a part of steam, coke, and pure oxygen fixed bed method are used to produce carbon monoxide and hydrogen as raw material 2 for synthesizing methane. Raw material 1 and raw material 2 are mixed and methanated to make civil gas, and the synthesis gas is directly compressed to make compressed civil gas, or further degassed LNG is produced after carbon dehydration; the remaining steam produced by methanation is combined with coke and oxygen-enriched air fixed bed to produce air gas instead of coke oven gas as coke oven fuel.

Description

technical field [0001] The invention relates to the field of chemical industry, and is a method for effectively utilizing production waste gas and cheap coke to produce new energy gas. Background technique [0002] For the production technology of coal refining coke, the usual method is to use about half of the coke oven gas for combustion to heat up the coke oven. The direct use of high-concentration hydrogen in coke oven gas as fuel is not as economical as using low-concentration hydrogen gas as fuel. [0003] The usual coke oven gas separation process of methane and high carbon hydrocarbons only utilizes the coke oven gas that is not returned to the oven, not all coke oven gas. [0004] The usual coke oven gas synthesis methane process only uses the coke oven gas that is not returned to the oven, not all the coke oven gas. [0005] For the production enterprises that have built coke ovens, when the sales of coke and coke oven gas are not smooth, using coke and coke oven...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L3/08C10L3/10
CPCC10L3/08C10L3/101C10L3/106
Inventor 杨皓王巍宁平王娟芸王猛
Owner 杨皓
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