常用的净化方法酸雾净化塔的气液两相流可以是逆流或并流，通常采用逆流操作。 The gas-liquid two-phase flow of the acid mist purification tower can be countercurrent or co-current, and usually adopts countercurrent operation. An absorbent is added from the top of the tower to flow from top to bottom, and it comes into contact with the gas flowing from the bottom to the top to absorb the liquid at the bottom of the tower
Dilution diffusion method
Principle: The odorous gas is discharged into the atmosphere through the chimney or diluted with odorless air to reduce the concentration of odorous substances and reduce the odor.
Scope of application: It is suitable for treating medium and low concentrations of malodorous gases emitted by tissues. Advantages: low cost and simple equipment. Disadvantages: susceptible to meteorological conditions, there are still malodorous substances.
Principle: By using the characteristics of some substances in the odor that are easily soluble in water, the odor components are in direct contact with water and dissolved in water to achieve the purpose of deodorization.
Scope of application: Water-soluble and organized sources of malodorous gases. Advantages: simple process, convenient management, low equipment operation cost, secondary pollution, and need to deal with detergent.
Disadvantages: low purification efficiency, it should be combined with other technologies, and the treatment effect of thiols and fatty acids is poor.
Acid mist purification tower deodorized with activated sludge
Principle: Disperse odorous substances into a mixture containing activated sludge by aeration, suspended microorganisms can degrade odorous substances.
Scope of application: Japan has been used for odor treatment in manure treatment plants and sewage treatment plants. Advantages: After domestication of activated sludge, the removal rate of odor components that do not exceed the limit load can reach more than 99.5%. Disadvantages: Limitations. There are some limitations to applying this method.
Multimedia catalytic oxidation process
Principle: The reaction tower is filled with a special solid filler composed of a multi-medium catalyst. The odor passes through the filler layer under the action of the induced draft fan and comes into full contact with the liquid-phase composite oxidant. The solid-phase filler is fully decomposed by the catalysis of the multi-medium catalyst in the odor.
The application of the acid mist purification tower in the food industry. In the food industry, a spray adsorption method is used to spray hollow ball filler on the filler layer to achieve a contact reaction with the gas and purify the exhaust gas.
Purify the workshop exhaust gas, remove the malodorous gas, produce no malodor, the treatment effect is obvious, and meet the national emission standards.
Composition and hazards of food industry waste gas
The food manufacturing industry is often accompanied by a large amount of organic waste gas and malodorous gases. Malodorous pollutants refer to various gaseous substances that stimulate the olfactory organs, cause people to be unhappy, and damage the living environment.
Plastic waste gas treatment urgently requires plastic regeneration, causing serious pollution to the environment. During the processing, waste gas, waste water and solid waste will inevitably be generated, which will cause three-dimensional pollution to the environment. Waste gas pollution: the production of plastic products requires the addition of stabilizers, antioxidants, light stabilizers, etc. These substances will decompose and generate a large amount Toxic and irritating organics. Gas produced when plastic is melted and drawn. In addition, some production companies also use incineration to treat wastes such as old screens, and to classify the remaining plastic waste to diffuse a large amount of toxic fumes and produce gaseous organic compounds such as hydrocarbons and benzene in the industrial waste gas emitted during the production process. Contaminants, which have unique ODOs. R, when discharged into the surrounding air, usually causes adverse sensory effects. At the same time, the harm to the human body is also quite serious.
The main components of the acid mist purification tower are hydrogen sulfide, methyl mercaptan, methyl sulfide, dimethyl disulfide, carbon disulfide, ammonia, trimethylamine, and styrene, which cause serious harm to human health and the ecological environment. Lighter causes discomfort, headaches, dizziness, nausea, vomiting, loss of appetite and mental distraction. The most important are the respiratory system, the circulatory system, and the distribution system. The chemical system and the reproductive system cause different levels of toxicity. Among them, aromatic compounds such as benzene, toluene, and styrene can also cause distortion and canceration of the human body. To this end, malodor must be implemented. Effective control and governance.