Ethylene oxide waste gas absorption coupling catalytic reaction purification device and process

Abstract

The invention discloses an ethylene oxide waste gas absorption coupling catalytic reaction purification device and process. High-concentration ethylene oxide waste gas is absorbed by several-level absorption spray tower water, remaining waste gas is emitted on standard, ethylene oxide water solution collected by an absorption spray tower kettle enters a hydration reactor to perform ethylene oxidehydration reaction to generate high-concentration ethylene glycol, part of ethylene glycol water solution reflows into the tower kettle after reaction, clear water is added, the ethylene glycol watersolution continues to serve as ethylene oxide waste gas absorption solution to be used, and parts of reaction products returns to an ethylene glycol water solution storage tank to be recycled. According to the process, absorption and reaction are divided into two portions of an independent unit, the absorption efficiency of a whole process is high, operation processes are simple, energy consumption is low, resource utilization of the absorption solution is achieved, occupied area is small, operation is simple, integrated operating cost is low, safety is high, emission of waste liquid is omitted, and the process is applicable to control of ethylene oxide waste gas of various large and small sterilization enterprises.

Description

[0001] (1) Technical field [0002] The invention relates to the field of air pollution control and its resource utilization, in particular to a device and process for treating toxic and harmful ethylene oxide waste gas in the disinfection and sterilization industry and its resource utilization. [0003] (2) Background technology [0004] As a second-generation disinfectant after formaldehyde, ethylene oxide is often used in bandages, sutures, infusion tubes, acupuncture, precious cultural relics, etc. Disinfection and sterilization of items that are not resistant to high temperature and humidity. Ethylene oxide has a very low boiling point (only 10.8°C), and it is very easy to volatilize into the air and gather in low-lying places, and is explosive and flammable. It is highly toxic to the human body and can cause cancer if exposed to it for a long time. The state stipulates that the emission standard of ethylene oxide is 2.5ppm. The existing ethylene oxide tail gas treatmen...

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Problems solved by technology

But at the same time, a large amount of low-concentration EO waste liquid will be produced after absorption. These waste liquids mainly contain mixtures such as ethylene glycol, diethylene glycol, triethylene glycol, and inorganic acids and bases. The separation is relatively difficult, and the subsequent distillation and purification costs are high. As a result, EO waste liquid becomes dangerous solid waste, which cannot be effectively reused and causes secondary pollution

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