A kind of styrene waste gas treatment method

Abstract

The invention discloses a styrene exhaust gas treatment method including the following steps: carrying out countercurrent contact of styrene exhaust gas with an alkaline solution of potassium permanganate, carrying out an oxidation reaction of styrene with the alkaline solution of potassium permanganate in the contact process, and after completion of the reaction, discharging the exhaust gas having styrene consumed into the atmosphere. With adopting of the technological process of spraying the potassium permanganate solution to absorb styrene, styrene-containing exhaust gas generated by refinery enterprise styrene materials and generated in highway car loading, wharf shipment, storage tank breathing and other various places can be treated at the same time, and the method has higher treatment efficiency, besides, is simple in flow, small in occupied land area and low in energy consumption, can meet the national latest environmental protection standard requirements for styrene emission limit values, effectively reduces the styrene emission and eliminates environmental risks and security risks at refinery enterprise styrene workplaces.

Description

technical field [0001] The invention relates to a method for treating styrene waste gas, which is used for treating styrene-containing waste gas generated during road loading, wharf loading and storage tank respiration of styrene materials in refining and chemical enterprises. Background technique [0002] Styrene is an important chemical monomer in plastic production and other industries, and its application range and consumption are increasing. Refining and chemical enterprises will produce a large amount of styrene-containing waste gas in the process of styrene road loading, wharf loading and tank tank breathing. The discharge of these styrene-containing waste gases has a huge impact on the ecological environment and human health. Security risks. The latest GB 31571 "Petrochemical Industry Pollutant Discharge Standard" stipulates that the emission limit of styrene in exhaust gas is 50mg / m 3 . However, at present, the effective treatment of styrene waste gas in China is...

AI Technical Summary

Problems solved by technology

The condensation method can directly recover liquid styrene, but the condensation method needs to be lowered to a very low temperature to meet environmental protection standards, the energy consumption is high, and the device configuration is complicated and difficult to maintain

The adsorption method mostly uses activated carbon adsorbents to treat styrene waste gas, but styrene has the problems of easy polymerization, polymerization heat effect and adsorption heat effect, so long-term use of activated carbon adsorption will easily lead to deactivation of activated carbon and failure to regenerate, and there is a risk of fire

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