Fermented tail gas purification treatment method

Abstract

The invention discloses a fermented tail gas purification treatment method, and belongs to the field of comprehensive treatment of industrial tail gases. The fermented tail gas purification treatment method comprises treatment steps of pretreatment, molecular sieve treatment, catalytic oxidation, alkali washing, secondary oxidation and water washing. According to the fermented tail gas purification treatment method, a cyclone separator, a primary filter, a condenser and a heater are adopted to pretreat a fermentation tail gas firstly, secondly, the fermentation tail gas is concentrated by using a honeycomb disc rotating wheel type molecular sieve, then the fermentation tail gas is subjected to oxidation decomposition in a high-temperature catalytic oxidation device, and finally through absorption of an alkali washing spraying tower, an oxidation spraying tower and a water washing spraying tower in sequence, residual harmful substances in the fermentation tail gas can be completely removed. By adopting the fermented tail gas purification treatment method, use of the spraying towers and absorption liquids can be greatly reduced, the tail gas treatment cost can be lowered, in addition, high treatment efficiency and a good purification effect can be achieved, and the fermentation tail gas can be in safe up-to-stand discharge.

Description

technical field [0001] The invention relates to a gas purification treatment method, in particular to a purification treatment method of fermentation tail gas, and belongs to the field of comprehensive treatment of industrial tail gas. Background technique [0002] The main components of fermentation tail gas are air and water vapor, but it will entrain trace amounts of volatile organic compounds, odorous gases produced in fermentation, and non-methane total hydrocarbons and other harmful substances. These harmful substances are directly discharged into the atmosphere and will cause certain pollution to the environment. . As people's awareness of protecting the environment has gradually increased, the emission standards and supervision of industrial exhaust gas have become more stringent, and the direct emission of fermentation exhaust gas without treatment will be prohibited and punished by relevant regulatory authorities. [0003] The commonly used purification treatment ...

AI Technical Summary

Problems solved by technology

Since there are many types of harmful substances in the fermentation tail gas, and the concentration is very low, and the treatment process is too simple, it is difficult to completely remove the harmful substances in the waste gas after only one oxidation and one alkali washing

At the same time, the discharge of fermentation tail gas in industrial production is particularly large, so the number of oxidation towers, alkali washing towers and water washing towers required to treat tail gas is large, the equipment occupies a large area, and the cost of construction, operation and maintenance is very high. The consumption of oxidizing agent and alkali absorbing liquid in the process is also very large

[0004] The current reports on the use of molecular sieves for waste gas treatment only combine molecular sieves with thermal incinerators or catalytic combustion devices, without subsequent treatment processes, which are prone to problems of insufficient catalysis or combustion, and are mainly used in spray coatings containing only organic solvents and tar processing waste gas treatment field

However, for fermentation waste gas with relatively complex components, it is difficult to achieve a good purification effect by using these methods, and there are still harmful substances remaining, which cannot fully meet the needs of clean production and safe discharge.

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