High-concentration tetrahydrofuran organic waste gas treatment process and device

Abstract

The invention discloses a high-concentration tetrahydrofuran organic waste gas treatment process and device, and belongs to the technical field of waste gas treatment. The device comprises a gas conveying device, an adsorption device, an LEL online monitoring device, a desorption device, a vacuum pump and a condensation recovery device, a nitrogen generator is arranged on the gas inlet pipeline; the adsorption device comprises at least two adsorption tanks which are arranged in parallel and have the same structure, and the adsorption material is a resin and activated carbon fiber composite layer; the LEL online monitoring device is connected with the gas conveying device, the adsorption device, the desorption device and the vacuum pump; the vacuum pump is connected with the adsorption tank; and the adsorption device and the desorption device are connected with the condensation recovery device. When the device is used for waste gas treatment, the LEL online monitoring device detects the concentration of waste gas in real time, the whole process is adjusted and controlled by the controller, and residual high-concentration waste gas in the valve switching process is rapidly adsorbed through activated carbon fibers. The whole treatment process system is in a low-oxygen state, the safety is improved, and the treatment efficiency and the solvent recovery rate are high.

Description

technical field [0001] The invention belongs to the technical field of waste gas treatment, and in particular relates to a high-concentration tetrahydrofuran organic waste gas treatment process and device. Background technique [0002] Tetrahydrofuran (THF) is a colorless, transparent, volatile organic liquid with an ether odor, with a molecular weight of 72.11, a density of 0.887g / mL, a melting point of 108.5°C, and a boiling point of 66°C. It is compatible with acetone, water, ether, benzene, etc. Miscible with most organic solvents. Tetrahydrofuran is a solvent with excellent performance, used to dissolve PVC, butadiene, etc.; it can be used as a raw material for organic synthesis, such as the production of progesterone. Tetrahydrofuran is volatile. During production, storage and transportation, a large amount of tetrahydrofuran waste gas will volatilize into the environment, causing harm to the human body and the environment. [0003] At present, the commonly used trea...

AI Technical Summary

Problems solved by technology

Tetrahydrofuran is volatile. During production, storage and transportation, a large amount of tetrahydrofuran waste gas will volatilize into the environment, causing harm to human body and environment.

The activated carbon adsorption bed has the following problems in the treatment of THF organic waste gas: ① THF is a polar gas, and activated carbon is a poor adsorbent for THF, and the adsorption effect is poor; The effect is poor; ③ THF exhaust gas is very likely to contain peroxides, and peroxides have the ability to modify the surface of activated carbon to make them lose their adsorption force; ④ THF and air can form explosive mixtures, and activated carbon adsorption devices are likely to cause safety accidents

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