Ethylene oxide waste gas treatment and energy recovery system

Abstract

The invention relates to an ethylene oxide waste gas treatment and energy recovery system. The system comprises an EO tail gas generating device, a tail gas absorbing device and an energy recycling device, wherein the tail gas absorbing device comprises a water ring type vacuum pump, a steam-water separator, a water storage tank, a plurality of combined type ethylene glycol reaction tanks and a combined type spraying tower; the energy recycling device comprises a waste liquid combustion spiral tube heat exchanger, a plurality of gas-water heat exchangers, a plurality of combined type air energy heat pumps, an activated carbon adsorption box and an induced draft fan, the waste liquid combustion spiral tube heat exchanger comprises a combustion tank, a waste liquid spraying device, a combustion-supporting gas jetting device and a compressed air jetting device. According to the invention, the waste liquid of ethylene glycol treated by the tail gas absorbing device and the ethylene oxide gas which is not absorbed by water are combusted, through automatic control, full combustion is guaranteed, and the ethylene oxide, ethylene glycol and other organic matters are completely converted into water and carbon dioxide to realize the zero emission of ethylene oxide, at the same time, a plurality of groups of heat exchangers are arranged, and the combusted energy is subjected to heat exchange application.

Description

technical field [0001] The invention relates to an ethylene oxide waste gas treatment system, in particular to an ethylene oxide waste gas treatment and energy recovery system. Background technique [0002] The main source of ethylene oxide waste gas is the waste gas produced by ethylene oxide sterilization, a low-temperature chemical sterilization method that is widely used because of its minimal impact on the product. The commonly used ethylene oxide waste gas treatment devices on the market are washing towers and incineration towers. [0003] The working principle of the exhaust gas treatment system of the leaching tower is to pass ethylene oxide into the sulfuric acid solution, pass through the leaching tower, make the ethylene oxide and the sulfuric acid solution fully contact, dissolve in the sulfuric acid solution, and under the catalysis of sulfuric acid, the ring Ethylene oxide is hydrated to form ethylene glycol, which usually requires multi-stage leaching, but et...

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Problems solved by technology

[0003] The working principle of the exhaust gas treatment system of the leaching tower is to pass ethylene oxide into the sulfuric acid solution, pass through the leaching tower, make the ethylene oxide and the sulfuric acid solution fully contact, dissolve in the sulfuric acid solution, and under the catalysis of sulfuric acid, the ring Ethylene oxide is hydrated to form ethylene glycol, which usually requires multi-stage leaching, but ethylene oxide cannot be completely absorbed, and a small amount of ethylene oxide will be discharged into the atmosphere, causing pollution to the environment

And the waste liquid generated is hazardous waste, which needs to be treated by a qualified hazardous waste treatment company, and the treatment cost is expensive

[0004] The working principle of the combustion tower exhaust gas treatment system is to directly burn ethylene oxide to generate carbon dioxide and water. The removal rate of ethylene oxide can reach 100%, and there is no pollution to the environment. However, this method requires high equipment and has great safety hazards. Because ethylene oxide is within the concentration range of 2.6% to 100%, it will explode when it encounters an open flame, and the energy is not recovered.

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