Multi-component stink exhaust gas biological purifying method

A biological purification, multi-component technology, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., can solve the problems of not being able to purify exhaust gas at the same time, the impact of biological purification is large, and it is difficult to ensure the purification rate, etc. Degradation efficiency and operation flexibility, reduction of processing load, and the effect of large operation flexibility

Active Publication Date: 2010-12-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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  • Multi-component stink exhaust gas biological purifying method
  • Multi-component stink exhaust gas biological purifying method
  • Multi-component stink exhaust gas biological purifying method

Examples

Experimental program
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Effect test

Embodiment 1

[0037] The fugitive exhaust gas from the biochemical aeration tank of a sewage treatment plant contains 50-100 mg / m of hydrogen sulfide 3 , dimethyl disulfide 10mg / m 3 , toluene 40mg / m 3 , Xylene 60mg / m 3 , the flow rate is 5000Nm 3 / h or so. A three-stage biological bubbling purification tower is adopted, including three bubbling reaction zones and three spraying reaction zones. The internal components of the bubbling purification tower are determined according to the preferred data in the specific embodiment, and the liquid-gas ratio is 10L / Nm 3 , The residence time of the biological bubbling purification tower bacteria liquid in the liquid storage tank is 30 seconds. The thickness of the liquid phase layer in the bubbling reaction zone is 100mm, and the height of the spray section is 250mm. The temperature of the bacterial liquid in the bubbling purification tower is 25°C, mainly acidophilic thiobacillus, and the pH value of the microbial liquid is maintained at about ...

Embodiment 2

[0040] In the fugitive exhaust gas of the sewage treatment plant of an oil refinery. Hydrogen sulfide 10mg / m 3 , VOCs 300mg / m 3 , the flow rate is 2000Nm 3 / h or so. A two-stage pulse bubbling purification tower is adopted, including two bubbling reaction zones and two spraying reaction zones, and the internal components of the bubbling tower are determined according to the preferred data in the specific embodiment. The thickness of the liquid phase layer in the bubbling reaction zone is 100mm, and the height of the spray section is 200mm. The temperature of the bacterial solution was 10°C. The filter tower adopts trickling filter tower, and the packing adopts plastic polyhedral ball packing. Other operating conditions are identical with embodiment 1.

[0041] After being purified by the biological bubble tower and the biological trickling filter tower, the hydrogen sulfide purification rate is 100%, the VOCs purification rate is 99%, and the tail gas emission rate is in...

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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...

Claims

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Application Information

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IPC IPC(8): B01D53/84B65D90/30
CPCY02A50/20
Inventor 郭兵兵彭德强刘忠生刘玲
Owner CHINA PETROLEUM & CHEM CORP
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