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Exhaust gas treatment equipment processing principle
Dilution diffusion method
Principle: The smell of gas through the chimney to the atmosphere, or diluted with odorless air to reduce the concentration of malodorous substances to reduce odor. Scope of application: Suitable for handling malodorous gases with medium and low concentrations of organic pollutants. Advantages: low cost, simple equipment. Disadvantages: vulnerable to weather conditions, stench material still exists.
Water absorption method
Principle: The use of certain substances in the odor of water-soluble properties, the odor component in direct contact with water, so as to dissolve in water to achieve the purpose of deodorization. Application: water-soluble, organized sources of odor emissions. Advantages: simple process, easy management, low operating costs of equipment produce secondary pollution, the need to wash liquid for processing. Disadvantages: low purification efficiency, should be used in combination with other technologies, the mercaptan, fatty acids, such as poor treatment.
Aeration activated sludge deodorization method
Principle: The malodorous substances in the form of aeration to disperse the mixture containing activated sludge, suspended microorganisms grow degradation of malodorous substances applicable to a wide range. Application: As of 2013, Japan has been used for excrement disposal sites, sewage treatment plant odor treatment. Advantages: Activated sludge after acclimation, not more than the maximum load of malodorous ingredients, the removal rate of up to 99.5%. Disadvantages: aeration intensity by the limitations of the application of the law there are some limitations.
Multi-media catalytic oxidation process
Principle: The reaction tower filled with a special solid filler, filler compound with multi-media catalyst. When the malodorous gas passes through the packing layer under the action of an induced draft fan and is in full contact with the liquid phase mixed oxidant sprayed through the special nozzle in a diffused spray form on the surface of the solid phase filler and under the catalysis of a multi medium catalyst, In the pollution factor is fully decomposed. Scope: Wide range of applications, especially for the treatment of air volume, high concentration of exhaust gas, hydrophobic pollutants have a good removal rate. Advantages: small footprint, low investment, low operating costs; easy management, ready to use. Disadvantages: resistance to impact load, easy to pollutant concentration and temperature changes, need to consume a certain amount of pharmaceutical.