Process of recovering ethylene and methane from emptying end gas of glycol apparatus

A ethylene glycol and tail gas technology, applied in organic chemistry, membrane purification/separation, etc., can solve the problems of polluting the environment, increasing production costs, wasting resources, etc., achieving simple operation, reducing raw material consumption, and small maintenance workload. Effect

Active Publication Date: 2010-06-02
中石油吉林化工工程有限公司
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Problems solved by technology

[0002] During the production of ethylene oxide by direct oxidation of ethylene and the production of ethylene glycol by hydration of ethylene oxide, the tail gas after washing is directly discharged into the venting system and enters the atmosphere. In addition to 11.77% CO in the tail gas 2 , 16% argon, 23% ethylene and 48% methane. Taking a 100,000 tons / year ethylene glycol plant as an example, the exhaust gas is 130NM per hour 3 , will cause the loss of 300 tons of ethylene and 600 tons of methane every year, waste resources, increase production costs, and pollute the environment

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  • Process of recovering ethylene and methane from emptying end gas of glycol apparatus
  • Process of recovering ethylene and methane from emptying end gas of glycol apparatus
  • Process of recovering ethylene and methane from emptying end gas of glycol apparatus

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Embodiment Construction

[0007] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0008] As shown in the figure, take the 100,000 tons / year ethylene glycol production plant as an example to implement the present invention, the equipment of the existing plant need not be changed, only need to increase the corresponding equipment. Raw material gas is the tail gas discharged from the original discharge port before the reformation of the ethylene glycol plant. After the present invention is provided with coarse filter F-101A, B, 40 mesh, the inlet temperature is 90 ℃ ~ 100 ℃, its inlet pressure (absolute Pressure, hereinafter all the same) is 1.8 ~ 1.9MPa, and then through the fine filter F-102A, B, through the 60 mesh net, further remove granular impurities, to prevent poisonous membrane separator, the membrane separation is divided into two stages, with a First-stage membrane separator M-101A, B, C, second-stage memb...

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Abstract

The invention discloses a recycling technique of ethylene and methane in the organic compound manufacturing course, which comprises the following steps: transmitting tail gas of washing tower top intorough filter F-101; sieving through 40-order screen; transmitting into fine filter F-102; sieving through 60-order screen; removing solid particle; passing one-grade film separator M-101 and two-grade film separator M-102; obtaining permeatible gas with ethylene and methane; recycling; boosting through compressor; returning to decarburizing system of ethandiol device; obtaining new tail gas; transmitting into blow-down system; draining into atmosphere through torch.

Description

technical field [0001] The invention relates to a process for recovering waste gas in the production of organic compounds Background technique [0002] During the production of ethylene oxide by direct oxidation of ethylene and the production of ethylene glycol by hydration of ethylene oxide, the tail gas after washing is directly discharged into the venting system and enters the atmosphere. In addition to 11.77% CO in the tail gas 2 , 16% argon, 23% ethylene and 48% methane. Taking a 100,000 tons / year ethylene glycol plant as an example, the exhaust gas is 130NM per hour 3 , will cause the loss of 300 tons of ethylene and 600 tons of methane every year, which wastes resources, increases production costs, and pollutes the environment. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a process for recovering ethylene and methane in the waste gas discharged from an ethylene glycol plant. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C7/144C07C11/04C07C9/04
Inventor 王涛巩传志张锐锋白元峰唐忠杰孙伟刘学线宋顺利赵立岩杨昌南刘利
Owner 中石油吉林化工工程有限公司
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