Volatile organic waste gas purification process

Abstract

The invention relates to a volatile organic waste gas purification process, which is characterized in that: the high-concentration volatile organic waste gas is pressurized and sent into a biological scrubber to flow through the packing layer in the tower from bottom to top, and countercurrently contact with the solution attached to the surface of the packing, after washing The liquid phase obtained at the bottom of the tower is sent to the bioreactor, and the exhaust gas overflowing from the top of the tower is sent to the oxidation furnace; the low-concentration volatile organic waste gas is sent from the bottom to the biological trickling filter for washing, and the gas phase part enters the middle part of the biological trickling filter. The first packing layer, the top of the biological trickling filter sprays the first spray liquid downward; after the mixed waste gas is absorbed by the packing layer, the mixed waste gas enters the biological filter from the upper part of the biological filter; the second spray liquid sprays downward After being absorbed by the second packing layer, the gas phase is drawn out and sent to the dehumidifier, and the dehumidified gas phase is sent to the activated carbon adsorption tower. After being adsorbed by activated carbon, the purified tail gas is vented.

Description

technical field [0001] The invention relates to the treatment of industrial pollutants, in particular to the purification process of volatile organic waste gas VOCs. Background technique [0002] As a characteristic pollutant in the petrochemical industry, VOCs mainly come from organized emissions, unorganized emissions from storage tanks, leakage from production equipment, volatilization during wastewater treatment, process emissions, and solvent volatilization, etc. Among them, wastewater collection, transportation and treatment systems are important. source of emission. In the process of wastewater treatment, due to the VOCs concentration gradient difference between the gas and liquid phases, the influence of changes in ambient temperature and pressure, and the aeration treatment process, most of the volatile organic compounds escape from the wastewater and are discharged in the form of fugitive emissions. way into the atmospheric environment, bringing a series of safety...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide an organic waste gas purification process that can simultaneously treat multiple pollutants in order to solve the problems of poor pertinence, high investment costs, low safety, A series of problems such as poor stability, high energy consumption, expensive absorption solvent, and low purification efficiency

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