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What are the treatment options for exhaust pollution from industry?
Author: Want source: http://fatheroye.com/ date: 2019-10-29 Clicks:
A large amount of exhaust gas produced in the industrial production process and VOC organic exhaust gas contained in harmful substances such as carbon monoxide, sulfur dioxide and hydrocarbons are strong carcinogens. The traditional treatment method only discharges the exhaust gas generated from the operation point through high altitude, but this operation only transfers the pollution to the atmosphere and the surrounding environment, which has greater pollution and harm.

The absorption method usually uses a low-volatile or non-volatile liquid as an absorbent. The absorption device utilizes the differences in the solubility or chemical reaction characteristics of various components in the exhaust gas to make harmful components in the exhaust gas absorbed by the absorbent. So as to achieve the purpose of purifying exhaust gas. The main absorption methods of VOCs include physical absorption and chemical absorption. The commonly used method is physical absorption. According to the principle of similarity and compatibility of the organic phase, high boiling point and low vapor pressure are used for desorption treatment. VOCs are recovered and organic liquids are regenerated.
The deodorant uses plant extraction technology to extract effective ingredients from the roots, stems, leaves and flowers and fruits of various plants. It generates forces under the action of rays, improves the activity of plant liquids, and can rapidly polymerize with various harmful and odorous molecules. , Chemical reaction such as substitution, replacement, adsorption, etc., the product is neutral, and it is an environmentally friendly product that effectively removes exhaust gas, odor and odor. Not only can it effectively absorb the odor molecules in the air, but also change the three-dimensional configuration of the adsorbed odor molecules, weaken the chemical bonds in the odor molecules, and increase the instability of the odor molecules. The molecules carry out chemical reactions to achieve complete deodorization and deodorization, and play an effective role in air purification.
Direct combustion refers to the use of fuel oil or gas as an auxiliary material for high-concentration organic waste gas, which is directly decomposed into non-toxic substances at high temperatures. The low concentration of organics is not sufficient to burn without auxiliary fuel.
Catalytic combustion means that in the combustion equipment, the organic waste gas is preheated first, and the chemical reaction process is completed at a lower temperature and in a shorter time through the action of a catalytic bed. The metal catalysts used are mainly Pt and Pd. The technology is mature and has high catalytic activity, but it is relatively expensive. When processing halogen organic compounds containing NSP, the organic compounds are susceptible to oxidation and deactivate the catalyst. Non-metal catalysts have transition elements such as cobalt, Rare earth, etc.
The basic principle of the membrane separation method is based on the difference in the speed at which each component in the gas penetrates the membrane. The speed at which each component penetrates the membrane is related to the nature of the gas and the characteristics of the membrane and the partial pressure of the gas on both sides of the membrane. Purification of organic waste gas is based on the ability of air to permeate the membrane and the ability of organic vapor to separate the two.
The condensing method is based on the feature that substances have different saturated vapor pressures at different temperatures, and lowers the system temperature or increases the system pressure to condense those pollutants in the vapor state and separate them from the exhaust gas. VOCs recovery by condensation method uses the low temperature generated by the condensing device to reduce the temperature of the VOCs-air mixed gas. When the mixed gas enters the condensing device, the components with different dew point temperatures in the VOCs will be condensed into a liquid and separated.
The basic principle of the purification of waste odor from natural plant extracts is that some special natural plants are extracted and combined with waste odor gas molecules to decompose, polymerize, replace, replace and add chemical reactions, which promotes the change of waste odor gas molecules. Some molecular structures make it lose odor, and later produce odorless, non-toxic substances.

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