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Process for pretreatment of coke oven gas and partial oxidation preparation of synthetic raw gas

A process method and technology of coke oven gas, which is applied in the chemical modification of combustible gas, purification/transformation of combustible gas, petroleum industry, etc., to achieve the effects of low investment, full use of heat, and reduced consumption

Active Publication Date: 2008-08-20
WUHUAN ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, there is no large-scale synthetic ammonia (300,000 tons of ammonia / year) device or large-scale methanol (300,000 tons of methanol / year) device in production and operation of coke oven gas pretreatment, pure oxygen partial oxidation to synthetic raw material gas

Method used

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  • Process for pretreatment of coke oven gas and partial oxidation preparation of synthetic raw gas

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Embodiment 1

[0031] The process flow and main parameters of the 350,000-ton ammonia synthesis plant designed by the present invention using coke oven gas as raw material.

[0032] Process description:

[0033] 1. Electric tar capture: The coke oven gas from the boundary area passes through the electric tar capture device 1 to remove the tar in the coke oven gas to less than 0.2PPM

[0034] 2. Naphthalene removal from coke oven gas: the coke oven gas after electric tar removal is boosted to 1.3bar by blower 2, and the temperature is 40°C. The gas is compressed to 3.1bar (bar) by the feed gas compressor 4 in one stage, and the coke oven gas with a temperature of 160±10°C enters the fine naphthalene removal tank 5 after heat exchange, and the naphthalene in the coke oven gas after two-stage naphthalene removal is reduced to 60 mg / Nm 3 When it drops below 0.1PPm, the coke oven gas is cooled to normal temperature and then returns to the raw gas compressor 4.

[0035] 3. Deoxidation and desul...

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Abstract

The invention provides a technique for preparation of synthesis raw gases by pretreating coking gas and partial oxidation of coking gas and its devices to reach the purpose of producing large-scale synthesis ammonia and methanol device. The said technique mainly includes electrical tar collecting of coking gas, naphthalene-removing, deoxidation, desulfuration, pretreatment of coking gas, partial oxidation of coking gas, steam conversion and reaction heat utilization of reformed gases. The invention pretreats coking gas containing 20 %-30 % methane to get the coking gas, oxygen and water vapour to perform partial oxidation and steam conversion in converter according the purpose of synthesis raw gases by selecting oxidants with different components and reach a balance of selfheat. After the conversion reaction, the synthesis raw gases containing less than 0.5 % of methane content are obtained. The consumption of the coking gas reduces by 15 %-20 % compared with traditional conversion process, the consumption of the vapor reduces by 50 %-55 %, the investment reduces by 10 %-15 %, which can eliminate the discharge of the flue gas and protect the environment.

Description

technical field [0001] The invention relates to the field of comprehensive utilization of coke oven gas, in particular to a method of pretreatment of coke oven gas with electric tar capture, coke oven gas denaphthalene removal, coke oven gas deoxidation and coke oven gas desulfurization, and then treated with pure oxygen or oxygen-enriched The process method and key equipment for producing synthetic raw material gas by partial oxidation of air are designed to meet the requirements of synthetic raw material gas for large-scale synthetic ammonia or / and synthetic methanol production using coke oven gas as raw material. Background technique [0002] Coke oven gas is the coke oven gas obtained by recovering coking products during the high-temperature coking process of coal under the isolation of air. The main composition range of coke oven gas is as follows. [0003] Main components of industrial coke oven gas [0004] components Content / % (volume) Example 1 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10K3/00
Inventor 汪寿建李要合肖晓愚严应群王玉霞栾忠升
Owner WUHUAN ENG
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