High-temperature coal tar hydrogenation, post-delayed coking and methanol preparation by utilizing coke oven gas combined technology

A technology of high-temperature coal tar and coke oven gas, which is applied in the fields of hydrotreating process, petroleum industry, hydroxyl compound preparation, etc., can solve the problems of unrealized industrialized production, extraction of phenol and naphthalene from coal tar, and reduce air pollution, The effect of low overall cost and maximum energy utilization

Inactive Publication Date: 2012-08-15
焦云
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0002] At present, Shaanxi Tianyuan Co., Ltd. delays coking into the whole fraction of coal tar. Delayed coking cannot extract phenol and naphthalene from coal tar. Part of the light oil fraction is cracked into gases below C4 during the delayed coking process. Therefore, most domestic coking plants adopt The method of direct combustion for power generation, even if it is recycled,

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] (1) Process for producing methanol from coke oven gas:

[0016] The coke oven gas sent from the coking plant first enters the coke oven gas cabinet to buffer and stabilize the pressure. The coke oven gas compressor draws gas from the gas cabinet and pressurizes it to 2.5MPa, and then enters the fine desulfurization device to desulfurize the total sulfur in the gas. To below 0.1ppm, the methane content in the coke oven gas reaches 26%. The pure oxygen catalytic partial oxidation conversion process is used to convert methane and a small amount of multi-carbon hydrocarbons in the gas into carbon monoxide and hydrogen, which are useful components for synthesizing methanol. The converted gas composition meets The basic requirement of raw material gas for methanol synthesis is that the converted gas is compressed to 6.0MPa by the synthesis gas compressor and enters the methanol synthesis unit. The methanol synthesis adopts 6.0MPa low-pressure synthesis technology, and the rec...

Embodiment 2

[0022] (1) Process for producing methanol from coke oven gas:

[0023] The coke oven gas sent from the coking plant first enters the coke oven gas cabinet to buffer and stabilize the pressure. The coke oven gas compressor draws gas from the gas cabinet and pressurizes it to 2.5MPa, and then enters the fine desulfurization device to desulfurize the total sulfur in the gas. To below 0.1ppm, the methane content in the coke oven gas reaches 26%. The pure oxygen catalytic partial oxidation conversion process is used to convert methane and a small amount of multi-carbon hydrocarbons in the gas into carbon monoxide and hydrogen, which are useful components for synthesizing methanol. The converted gas composition meets The basic requirement of raw material gas for methanol synthesis is that the converted gas is compressed to 6.0MPa by the synthesis gas compressor and enters the methanol synthesis unit. The methanol synthesis adopts 6.0MPa low-pressure synthesis technology, and the rec...

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PUM

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Abstract

The invention relates to a high-temperature coal tar hydrogenation, post-delayed coking and methanol preparation by utilizing coke oven gas combined technology. The combined technology comprises the following technologies: (1) a methanol preparation technology by utilizing coke oven gas, (2) a high temperature coal tar hydrogenation technology and (3) a needle coke preparation technology by utilizing a post-delayed coking technology. With the adoption of the combined technology provided by the invention, when a coking plant produces cokes, by-products coke oven gas and high-temperature coal-tar oil are produced, the coke oven gas is used as a raw material for manufacturing methanol, the by-product spread air escape of the methanol is used for preparing hydrogen through a pressure swing adsorption device and then the hydrogen is taken as the raw material for the high-temperature coal tar hydrogenation; the by-product maltha generated by the high-temperature coal tar hydrogenation enters a post-delayed coker, is used as the raw material for manufacturing the needle coke; each productive unit is connected with each step, and a circulation economic model with energy conservation and emission reduction is realized; and therefore, the composite cost is low, the air pollution of the coking plant to surrounding environment is reduced.

Description

technical field [0001] The invention relates to a combination process of high-temperature coal tar hydrogenation, post-delayed coking and methanol production from coke oven gas. Background technique [0002] At present, Shaanxi Tianyuan Co., Ltd. delays coking into the whole fraction of coal tar. Delayed coking cannot extract phenol and naphthalene from coal tar. Part of the light oil fraction is cracked into gases below C4 during the delayed coking process. Therefore, most domestic coking plants adopt The method of direct combustion for power generation, even if it is recycled, is limited to the production of methanol. There is no complete coke oven gas-to-methanol synthesis tail gas co-production of high-temperature coal tar hydrogenation to light fuel oil at home and abroad, let alone industrialized production. , or the hydrogenation source adopts different processes, such as direct coal gasification process or coke oven gas hydrogen production process. Contents of the ...

Claims

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Application Information

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IPC IPC(8): C10G67/00C10K1/00C07C31/04C07C29/151
CPCY02A50/20
Inventor 焦云宋希祥杨国祥孙喜忱秦怀李毓良
Owner 焦云
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