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A method of coupling polygeneration of oil and gas in coal chemical industry

A technology of oil and gas coupling and coal chemical industry, applied in the field of coal chemical industry, can solve the problems of low added value of products, low utilization rate of gas and tar, and achieve the effect of avoiding waste of resources, reducing environmental pollution, and strong process flexibility

Active Publication Date: 2015-10-07
SHAANXI COAL & CHEM TECH INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of low utilization rate of gas and tar and low added value of products in the prior art, provide a method for coupling polygeneration of oil and gas in the coal chemical industry, improve the utilization rate of gas and tar, and produce high added value product

Method used

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  • A method of coupling polygeneration of oil and gas in coal chemical industry
  • A method of coupling polygeneration of oil and gas in coal chemical industry
  • A method of coupling polygeneration of oil and gas in coal chemical industry

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Effect test

Embodiment 1

[0034] The atmospheric and vacuum distillation system A includes a tar storage tank 1 , an atmospheric distillation column 2 and a vacuum distillation column 3 . The tar storage tank 1 is connected to the inlet of the atmospheric distillation tower 2, the light oil outlet in the upper part of the atmospheric distillation tower 2 is connected to the inlet of the vacuum distillation tower 3, and the heavy oil outlet in the lower part of the atmospheric distillation tower 2 is connected to the oil-gas coupling system E The heavy oil mixing tank 4 in the middle is connected to the inlet, the outlet of the phenol oil in the upper part of the vacuum distillation tower 3 is connected to the inlet of the alkali washing tower 5 in the chemical removal system B, and the naphthalene oil outlet in the middle of the vacuum distillation tower 3 is connected to the chemical removal system B The inlet of the naphthalene rectifying tower 7 is connected, and the outlet of the washing oil at the ...

Embodiment 2

[0047] In order to further improve the whole system, raw coal pretreatment system F can be added. See the specific process image 3

[0048] The raw material pretreatment system F includes a raw coal screening device 22 , a dry distillation furnace 23 , a coke oven 24 , a high-efficiency separator 25 , and a gasifier 26 . The coking coal outlet of the raw coal screening device 22 is connected with the coking oven 24 , the non-coking coal outlet is connected with the dry distillation furnace 23 , and the pulverized coal outlet is connected with the gasifier 26 . The gas outlet of the carbonization furnace 23 and the gas outlet of the gasification furnace 26 are connected with the inlet of the high-efficiency separator 25, the gas outlet of the coke oven 24 is connected with the inlet of the gas storage tank 8 in the methanol conversion system C, the solid outlet of the carbonization furnace 23, the coking The solid outlet of the furnace 24 is connected to the inlet of the gas...

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Abstract

The invention provides an oil-gas coupling poly-generation method in the coal chemical engineering industry. The oil-gas coupling poly-generation method comprises the following steps of: treating and dividing coal tar into heavy oil fraction, crude phenol, dephenolized oil, crude naphthalene, naphthalene-removed oil and washing oil by virtue of a normal-pressure distillation system and a chemical-removing system; discharging the crude phenol and the washing oil; feeding the heavy oil fraction, the washing oil, the dephenolized oil and the naphthalene-removed oil to an oil-gas coupling system; treating the coal gas to obtain LPG (Liquefied Petroleum Gas), petrol, durene and dealkylation heavy oil by virtue of a methanol conversion system and an MTG (Methanol To Gasoline) system; discharging the LPG, the petrol and the durene; feeding the dealkylation heavy oil to the oil-gas coupling system and carrying out coupling hydrogenation treatment in the oil-gas coupling system to obtain naphtha and diesel oil. According to the oil-gas coupling poly-generation method in the coal chemical engineering industry disclosed by the invention, the tar and the coal gas are effectively coupled, so that the resource waste is avoided; the high-additional value oil and chemicals including phenol, naphthalene, aromatic hydrocarbon and the like are generated, so that the direct emission of coal gas and the car is prevente, and therefore, the environment pollution is reduced and the method is more friendly to the environment.

Description

technical field [0001] The invention belongs to the field of coal chemical industry, and relates to oil-gas coupling polygeneration technology in coal chemical industry, in particular to a method for oil-gas coupling polygeneration in coal chemical industry. Background technique [0002] The existing coal chemical industry includes coking, coal dry distillation, coal gasification, direct coal liquefaction and indirect coal liquefaction, among which gas and tar will be produced in coking, coal dry distillation, and coal gasification. At present, in the coking industry, most of the coke oven gas and tar produced by the coking plant are discharged or directly burned, which pollutes the environment and wastes resources. The recovery and treatment of coke oven gas is also limited to the synthesis of methanol, and the added value of the product is not high; in the coal dry distillation industry, for the pyrolysis gas and tar produced by pyrolysis, the current processing method for...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/02C10G2/00C10C1/08C10C1/12C10C1/00C07C7/04C07C15/24C07C1/20C07C15/02C07C37/86
Inventor 张晶闵小建孙显锋付刚乔婧拓婷婷周凡沈鹏飞赵鹤翔王丹君聂颖颖李学强李瑶刘双泰
Owner SHAANXI COAL & CHEM TECH INST
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