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Combined process for preparing Fischer-Tropsch synthetic oil raw material gas by utilizing coke-oven gas

A Fischer-Tropsch synthetic oil, combined process technology, applied in the petroleum industry, sustainable manufacturing/processing, preparation of liquid hydrocarbon mixtures, etc., can solve problems such as environmental pollution, waste of resources, etc., achieve high sulfur purification, and save investment costs , the obvious effect of economic benefits

Active Publication Date: 2012-08-22
SHANGHAI HUANQIU ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For a long time, the coke oven gas produced by coking enterprises has been burned in vain by "lighting sky lanterns", which wastes resources and pollutes the environment

Method used

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  • Combined process for preparing Fischer-Tropsch synthetic oil raw material gas by utilizing coke-oven gas

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Table 1 shows the composition and content of crude coke oven gas for a coke oven gas comprehensive treatment project in an industrial park in China.

[0019] Table 1 Composition and content of crude coke oven gas

[0020]

[0021] A combined process for preparing synthesis gas required for Fischer-Tropsch synthetic oil with coke oven gas as raw material, the process comprises the following steps:

[0022] (1) Coke oven gas pretreatment unit

[0023] Because the crude coke oven gas from the industrial park contains benzene, naphthalene and tar, etc., it is easy to cause compressor blockage, and impurities, hydrogen sulfide, hydrogen cyanide, ammonia, organic sulfur, etc. are likely to cause poisoning and deactivation of the F-T synthesis catalyst. Therefore, secondary purification of coke oven gas is required. Coarse coke oven gas (pressure: 4KPa(G), temperature: 30℃) from the industrial park first enters the gas tank for buffering, is boosted to 30KPa(G) by the Roo...

Embodiment 2

[0031] A combined process for preparing Fischer-Tropsch synthetic oil raw material gas from coke oven gas, the process includes a crude coke oven gas pretreatment unit, a gas compression unit, a coke oven gas non-catalytic partial oxidation unit, and a precision desulfurization and deep desulfurization unit, the crude coke oven The gas pretreatment unit is to enter the crude coke oven gas into the gas tank for buffering, pass through the water cooler and the oil removal tower respectively, and send it to the TSA temperature swing adsorption pretreatment process and the PSA pretreatment process to remove naphthalene, tar, Hydrogen sulfide, hydrocyanic acid, ammonia, organic sulfur and heavy hydrocarbon impurities make the tar content in coke oven gas less than 1mg / Nm 3 , naphthalene content is less than 5mg / Nm 3 , the benzene content is less than 5mg / Nm 3 , NH 3 Content less than 1mg / Nm 3 , H 2 S content is less than 2mg / Nm 3 , organic sulfur content is less than 5mg / Nm 3...

Embodiment 3

[0033] A combined process for preparing Fischer-Tropsch synthetic oil raw material gas from coke oven gas, the process includes a crude coke oven gas pretreatment unit, a gas compression unit, a coke oven gas non-catalytic partial oxidation unit, and a precision desulfurization and deep desulfurization unit, the crude coke oven The gas pretreatment unit is to enter the crude coke oven gas into the gas tank for buffering, pass through the water cooler and the oil removal tower respectively, and send it to the TSA pretreatment process and the PSA pretreatment process to remove naphthalene, tar and hydrogen sulfide entrained in the crude coke oven gas , hydrocyanic acid, ammonia, organic sulfur and heavy hydrocarbon impurities, so that the tar content in coke oven gas is less than 1mg / Nm 3 , naphthalene content is less than 5mg / Nm 3 , the benzene content is less than 5mg / Nm 3 , NH 3 Content less than 1mg / Nm 3 , H 2 S content is less than 2mg / Nm 3 , organic sulfur content is ...

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Abstract

The invention relates to a combined process for preparing a Fischer-Tropsch synthetic oil raw material gas by utilizing a coke-oven gas. The combined process comprises the following steps of: with coarse coke-oven gas as a raw material, removing naphthalene, tar, hydrogen sulfide, hydrocyanic acid, ammonia, organic sulfur and other heavy-hydrocarbon impurities out of coarse coke-oven gas in a pretreatment unit;; then pressurizing the coarse coke-oven gas in a gas compression unit; then converting into CH4 through oxidation of non-catalysis part of the coke-oven gas; and finally carrying out precision desulfurization and deep desulfurization, thereby obtaining the high-quality Fischer-Tropsch synthetic oil raw material gas. According to the invention, through a step-by-step purification combined process, impurities and the sulfurous gas in the coke-oven gas are removed efficiently, so that coke-oven gas becomes the synthetic gas with high additional value and high economic benefit; the coking industrial chain is prolonged; the coke-oven gas is converted into fuel oil, greenhouse gas and toxic gas which are brought about by gas combustion are reduced; the combined process meets national requirements of energy conservation, emission reduction and industry policy and has the advantages of low sulfur, high degree of purification, obvious environment effect, high resource utilization ratio, relative low construction investment in devices, low operating cost and the like.

Description

technical field [0001] The invention relates to a method for preparing Fischer-Tropsch synthetic oil raw material gas, in particular to a combined process for preparing Fischer-Tropsch synthetic oil raw material gas from coke oven gas. Background technique [0002] Coke oven gas is a by-product of the coking process. Its main components are hydrogen and methane, and a small amount of olefins, carbon monoxide and carbon dioxide, and trace impurities such as tar, naphthalene, NH3, and H2S. About 430 cubic meters of coke oven gas is produced for every ton of coke produced, half of which is used to return to the furnace for combustion. For a long time, the coke oven gas produced by coking enterprises has been burned in vain by "lighting sky lanterns", which wastes resources and pollutes the environment. Therefore, the comprehensive utilization of domestic coke oven gas is imminent. Contents of the invention [0003] The purpose of the present invention is to overcome the def...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/00C01B3/36C01B3/50C10G2/00
CPCY02P30/00
Inventor 刘峻江水张强石仙罗张丽丽吴永霞李宏耀
Owner SHANGHAI HUANQIU ENG
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