Treatment method and device suitable for treatment of medium and high temperature organic waste gas

Abstract

The invention provides a treatment method and device suitable for treatment of medium and high temperature organic waste gas. The process utilizes a sulfate free radical (SO4<->.) generated by contactactivation of a persulfate (S2O8<2->) and a high-temperature gas as a strong oxidant, and utilizes the characteristic that a solubilizing agent has a hydrophilic exterior and a hydrophobic interior or one hydrophilic end and one hydrophobic end to capture the insoluble organic waste gas in the gas phase by the solubilizing agent interface, so that the waste gas more easily breaks through gas-liquid mass transfer resistance, and the waste gas is dissolved and enters a spray liquid to be oxidatively decomposed. The treatment device for the waste gas mainly comprises a waste-gas reaction tower,medicine storage tanks, medicine adding pumps, a circulation pump, a high-temperature-resistant filler, atomizing spray nozzles, a demister and the like. Compared with a common Fenton method, the method provided by the invention does not need to cool the high-temperature waste gas; and transition metal modified cyclodextrin helps the waste gas to break through the gas-liquid mass transfer resistance, and transition metal groups have a promoting effect on generation of the SO4<->. by activation of the persulfate.

Description

technical field [0001] The invention belongs to the technical field of air pollution control, and in particular relates to a treatment method and equipment suitable for medium-high temperature organic waste gas treatment. Background technique [0002] Petroleum, petrochemical, pharmaceutical and many other important industries of the national economy will produce a large amount of volatile organic compounds (VOCs) in the production process. The high-temperature process sections of these industries, such as petroleum refining, fractionation, and drug synthesis sections, often emit complex components of exhaust gas, containing short-chain hydrocarbons, benzene series, oxygen-substituted hydrocarbons or halogenated hydrocarbons and other refractory organic substances, and the temperature is relatively high. High (>100°C). For this kind of exhaust gas, the general solution is to first cool the exhaust gas to below 40°C, then absorb and concentrate it with a zeolite runner, t...

AI Technical Summary

Problems solved by technology

Therefore, the Fenton reaction system of organic waste gas is different from the Fenton reaction system of wastewater, and its reaction is more difficult to realize and the reaction efficiency is lower.

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