Polymerization reaction end gas recovering process

Abstract

The invention discloses a recovery technology of high temperature and high pressure tail gas in the interval polymeric device, which is characterized by the following: decompressing and rinsing the high temperature and high pressure tail gas; transmitting the gas into low temperature and low pressure gas in the gas cabinet; cleaning and compressing and drying the low temperature and low pressure gas; producing fine polymeric reaction material. The invention can recover the interval tail gas and reinforce the operational reliability, which protects the environment and saves energy.

Description

technical field [0001] The invention relates to a process for recovering tail gas of polymerization reaction, in particular to a process for recovering high-temperature and high-pressure tail gas produced by ethylene-vinyl acetate, vinyl chloride-vinyl acetate and other production processes in a batch polymerization device. Background technique [0002] In the existing technology, the treatment methods of intermittently produced tail gas are generally high emission and incineration. The method of high discharge is to use the chimney system to lead the tail gas to a space higher than the ground (30 meters, 50 meters, etc. according to needs) and discharge it directly. The high discharge gas does not pollute the environment relatively significantly, or in There will be no obvious environmental pollution in a short period of time, but it is not a proper method to directly discharge the tail gas of chemical production into the atmosphere. The pollution to the environment will gr...

AI Technical Summary

Problems solved by technology

The method of high discharge is to use the chimney system to lead the tail gas to a space higher than the ground (30 meters, 50 meters, etc. according to needs) and discharge it directly. The high discharge gas does not pollute the environment relatively significantly, or in There will be no obvious environmental pollution in a short period of time, but it is not a proper method to directly discharge the tail gas of chemical production into the atmosphere. The pollution to the environment will gradually become apparent after decades, which is not conducive to the long-term development of the national economy and the Ecological Environment of the Earth

The method of incineration is to pass the intermittently produced tail gas through the flare system and ignite and burn it when it is discharged. It is suitable for some exhaust gas that is significantly polluted or slightly toxic but combustible, but when burning, due to the efficiency of the flare system, the design And other problems, resulting in insufficient combustion during combustion to produce a large amount of carbon monoxide, carbon black, etc., which directly pollute the atmosphere.

[0003] However, the tail gas produced by batch polymerization contains a large amount of polymerization reaction raw materials, and the content is often more than 80%. If the above-mentioned treatment method is adopted, it will not only cause environmental pollution, but also greatly waste the reaction raw materials