Low temperature organic malodorous gas treating system

Abstract

The invention discloses a low temperature organic malodorous gas treating system, comprising a malodorous gas collection system, an ozone generation system, an ozonation pre-reaction zone, a biological deodorizing tower, a heat energy recovery system and a spraying and watering device. During operation of the treating system, organic malodorous gas having passed through a deodorizing fan is mixed with ozone from an ozone generator in a conveying pipeline, a gas mixture enters into the ozonation pre-reaction zone, gas obtained after completion of a reaction enters into the biological deodorizing tower through the bottom of the biological deodorizing tower, and the heat energy recovery system is arranged at the bottom of the biological deodorizing tower. In the biological deodorizing tower, pollutants in malodorous gas is decomposed by microbes in a carbonaceous biological filter pack and then discharged from an air outlet at the upper part of the biological deodorizing tower after reaching standards, and the spraying and watering device is arranged above the filter pack. The low temperature organic malodorous gas treating system provided by the invention is especially applicable to treatment of organic malodorous gas at a temperature of less than 5 DEG C and has the advantages of a simple structure, basically no generation of secondary pollution, low operation cost and simple operation and management.

Description

technical field [0001] The invention relates to a polluted air treatment technology, in particular to a low-temperature organic malodorous gas treatment system, especially suitable for the treatment of organic malodorous gases with a temperature lower than 5°C. Background technique [0002] The main odor generated by the influent lifting pump room of the municipal sewage treatment plant is hydrogen sulfide. The odor generated during the anaerobic digestion of the sludge in the primary sedimentation tank is mainly hydrogen sulfide and other sulfur-containing gases. Ammonia gas and other volatile substances may be produced. Ammonia, amines, sulfides, fatty acids, aromatics and dimethyl sulfide will be produced during the composting process. The process of aerobic digestion and sludge air drying may produce a small amount of hydrogen sulfide, but mainly mercaptan and dimethyl sulfide gas. These substances can be removed by biodegradation. [0003] In addition, the odor prod...

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Problems solved by technology

[0003] In addition, the odor produced by some chemical factories, pharmaceutical factories, printing and dyeing factories and other production workshops and their sewage treatment facilities may contain a large amount of difficult-to- Biochemically degraded organic compounds, such as polycyclic aromatic hydrocarbons, heterocyclic compounds, chlorinated aromatic compounds, organic cyanides, organic synthetic polymer compounds, etc. The harm of these organic compounds to the environment is mainly reflected in: (1) long-term Residuality: Once discharged into the environment, they are difficult to be decomposed; (2) Bioaccumulation; the concentration in the organism after being enriched by the biological food chain is much higher than the concentration in the surrounding environment; (3) Semi-volatile: Volatile in the air (4) High toxicity: generally has toxic effects on humans and animals, some can cause biological endocrine disorders, reproductive and immune dysfunction, and some even cause serious diseases such as cancer

[0004] At present, biological deodorization technology is mainly used in the south. The reason is that in the area north of the Huaihe River, due to the low temperature in winter, the metabolic efficiency of microorganisms decreases significantly. Therefore, conventional biological deodorization technology is often carefully selected and used in the north.

As mentioned above, the odor of some industrial enterprises contains a large amount of organic pollutants that are difficult to biodegrade or are biotoxic, resulting in low efficiency of biological deodorization technology for such odor treatment, and even causing the system to fail to operate normally

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