Multi-component stink exhaust gas biological purifying method

Abstract

The invention discloses a multi-component stink exhaust gas biological purifying method which adopts two-stage biological purifying treatment. The method comprises the steps of: treating exhaust gas firstly through a biological bubble column and then through a biological filter column; and discharging tail gas after two-stage biological treatment. The biological bubble column utilizes microbe fungicide containing microbe thallus. Exhaust gas is diffused through a nozzle of the bubble column, and then stink components in the exhaust gas are purified and treated with the microbe fungicide in a bubble reaction district. The nozzle of the bubble column is in a bubble pulse valve structure. Absorption liquid containing thallus is used in the bubble absorption column, which not only can purify hydrogen sulfide and organic sulfide, but also can chemically absorb ammonia-class alkaline exhaust gas components in the exhaust gas; and thus, the purifying effect is improved. The invention has theadvantages of large operation flexibility and impact resistance, and the formal stable operation of the succession biological filter columns is ensured. The invention can be used for efficiently purifying the exhaust gas containing mixed stink components, such as sulfide, ammonia, VOCs (volatile organic chemcials), and the like, and is suitable for effusing stink exhaust gas in various sewage treatment plants and effusing exhaust gas in pump stations, and the like.

Description

technical field [0001] The invention relates to a biological purification method of malodorous waste gas containing sulfur, ammonia and VOCs, in particular to a biological purification method of malodorous waste gas containing harmful components such as hydrogen sulfide, methyl mercaptan and other organic sulfides and hydrocarbons. Background technique [0002] The sewage treatment plant is one of the main sources of odor pollution in oil refineries and municipal facilities. Due to its high operating temperature and the open operation of the biochemical pool, a large amount of odor pollutants are released during normal operation. These odor pollutants include sulfide Pollutants such as hydrogen, organic sulfides, ammonia, benzene series, and other VOCs. Long-term activities of employees in an environment polluted by these substances may cause diseases such as the respiratory system, digestive system, and reproductive system, and may also cause body diseases and cancer. ; Whe...

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Problems solved by technology

These methods can only remove hydrogen sulfide or hydrocarbons, and cannot simultaneously purify the exhaust gas of complex components

[0008] CN01804540.5 proposes a biological purification method equipped with an agitator, through which the inactive biofilm on the surface of the filler is shed and removed, thereby prolonging the service life of the bioreactor, and the method can purify various components Exhaust gas, but for sulfide exhaust gas with large concentration fluctuations, it is difficult to ensure the purification rate, and the impact on biological purification is also relatively large

[0009] CN01114172.7 adopts the method of pretreatment-catalytic combustion to purify the exhaust gas containing complex components. This method has high purification efficiency and can meet the requirements of strict environmental protection standards. When the temperature is low, the reaction temperature is reached entirely by electric heating. For environmental protection devices, the economy is relatively poor

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