Principles of exhaust gas treatmentExhaust gas treatment equipment, mainly the use of different technology, through the recovery or removal of emissions to reduce the harmful components of exhaust, to protect the environment, air purification of an environmentally friendly equipment.
Principle of handling:
Dilution diffusion method
Principle: the smell of gas through the chimney to the atmosphere, or with odorless air dilution, reduce the concentration of odor material to reduce odor. Scope: Suitable for handling, low concentrations of organized emissions of malodorous gases. Advantages: low cost, simple equipment. Disadvantages: susceptible to meteorological conditions, malodorous material still exists.
Water absorption method
Principle: the use of some substances in the smell of water soluble in the characteristics of the odor components directly contact with water, which dissolved in the water to achieve the purpose of deodorization. Scope of application: water-soluble, organized emissions of stench gas. Advantages: simple process, easy management, equipment operating costs low secondary pollution, the need for treatment of washing liquid. Disadvantages: low efficiency of purification, should be used in conjunction with other technologies, mercaptans, fatty acids and other treatment effect is poor.
Aeration type activated sludge deodorization method
Principle: the odor material in the form of aeration dispersed into the mixed with activated sludge, through the growth of suspended microorganisms to reduce the application of a wide range of odor substances. Scope: As of 2013, Japan has been used for stool processing, sewage treatment plant odor treatment. Advantages: activated sludge after acclimation, not exceeding the limit load of malodorous ingredients, the removal rate of up to 99.5% or more. Disadvantages: by the aeration strength limit, the application of the law there are some limitations.
Multi - media catalytic oxidation process
Principle: The reaction tower filled with a special solid-state filler, packing internal complex multi-media catalyst. When the malodorous gas passes through the packing layer under the action of the draft fan, it is fully contacted with the liquid phase compound oxidant sprayed in the mist with the special nozzle, and under the catalysis of the multi-media catalyst, the malodorous gas In the pollution factor is fully decomposed. Scope: Applicable to a wide range, especially for dealing with atmospheric, high concentrations of waste gas, hydrophobic pollutants have a good removal rate. Advantages: small footprint, low investment, low operating costs; easy management, that is ready to use. Disadvantages: impact load, not easy to contaminant concentration and temperature changes, need to consume a certain amount of pharmaceutical.
Low temperature plasma
The cryogenic plasma is the fourth state of the material after the solid state, the liquid state, and the gaseous state. When the applied voltage reaches the ignition voltage of the gas, the gas molecules are punctured to produce a mixture including electrons, various ions, atoms and free radicals The Although the electronic temperature is very high during the discharge process, but the temperature of the heavy particles is very low, the whole system shows a low temperature state, so called low temperature plasma. Low temperature plasma degradation of pollutants is the use of these high-energy electrons, free radicals and other active particles and pollutants in the role of pollutants, so that pollutants in a very short period of time decomposition, and follow-up of various reactions to achieve degradation of pollutants the goal of.
Low temperature plasma air purification equipment can significantly control the pollution are: VOC, odor gas, odor gas, soot, dust, can also be used for disinfection and sterilization. Low temperature plasma technology is a new purification process, does not require any additives, does not produce waste water, waste residue, will not lead to secondary pollution.
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