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How to solve the exhaust pollution in the spray booth? Coating is the surface treatment of qualified products and semi-finished products. The coating has the functions of anti-rust, anti-corrosion, beautiful appearance, and marking. Pre-treatment must be performed before painting. At this time, the product to be painted should be inspected as a whole, and repairable defects should be repaired and remedied.
Paint is often used in machinery, automobiles, electrical equipment, household appliances, ships, furniture and other industries. How to solve the exhaust pollution in the spray booth?
Paint exhaust characteristics:
The paint mist and organic waste gas pollution are mainly produced during the paint process. The paint is atomized into particles under high pressure. When spraying, some paints do not reach the paint surface and spread with the airflow to form paint mist. Organic waste gas comes from the volatilization of the thinner, and the organic solvent will not As the paint adheres to the paint surface, it will be completely released during the paint and curing process, forming organic waste gas.
According to reports, there are as many as 100 kinds of volatile organic compounds, which belong to alkanes, naphthenes, olefins, aromatic compounds, alcohols, aldehydes, ketones, esters, ethers and other compounds.
Paint exhaust hazards:
During the coating process, some organic waste gas in the form of spray particles are often generated. The waste gas contains many toxic substances, which will affect people's health, pollute the environment and cause many problems.
How to solve the exhaust pollution in the spray booth? Spray paint exhaust gas treatment plan:
Water spray method
Water spray technology is widely used in air pollution treatment, and it is also used in water spray process. For example, water curtain cabinet is an example. The principle is to spray water into the exhaust gas and settle water-soluble or large particles in the exhaust gas to pollute the pollution. The material is separated from the cleaning gas.
Its advantage is that water resources are easily available, and can be reused after filtering and sedimentation, which greatly reduces the waste of water resources. Water spray treatment of large particles has a higher efficiency and is often used as a pretreatment for exhaust gas treatment.
2. Condensation recovery method
The exhaust gas is condensed directly or after being concentrated, and valuable organic substances are separated and recovered from the condensate. This method is used to treat high-concentration, low-temperature, and small-air volume exhaust gas.
However, this method has a large investment, high energy consumption, and high operating costs, so there is no special need. This method is generally not used.
3. Absorption method
It can be divided into chemical absorption and physical absorption, but the chemical activity of "triphenyl" exhaust gas is low, and chemical absorption is generally not used. Physical absorption is to choose a liquid absorbent with less volatility, which has a higher affinity with the component being absorbed. After the absorption is saturated, it is heated, dissolved, and cooled before being reused.
This method is suitable for low atmospheric volume, low temperature, and low concentration exhaust gas. The device is complicated, the investment is large, the choice of absorption liquid is difficult, and there is secondary pollution.
4. Direct combustion method
Use the heat released by the combustion of auxiliary fuels such as gas or fuel oil to heat the mixed gas to a certain temperature (700-800 ℃), and stay for a certain period of time to burn combustible and harmful gases.
The method is simple in process and less in equipment investment, but has high energy consumption and operating costs.
5. Catalytic Combustion
The exhaust gas is heated to 200 ~ 300 ° C and burned in a catalytic bed to achieve the purpose of purification. The method has low energy consumption, high purification rate, no secondary pollution, simple process and convenient operation.
Suitable for high temperature and high concentration organic waste gas treatment, not for low concentration and high air volume organic waste gas treatment.
(1) Direct adsorption method: Organic gas can reach a purification rate of 95% directly through activated carbon. The equipment is simple, the investment is small, and the operation is convenient. However, activated carbon needs to be replaced frequently, and it is used for low-concentration and no need to recover pollutants.
(2) Adsorption recovery method: After organic gas is saturated with activated carbon, it is regenerated by hot air desorption.
7.Photocatalytic oxidation method
The exhaust gas is irradiated with special high-energy high-ozone ultraviolet rays, so that the molecular chains of organic or inorganic high-molecular odor compounds react with ozone under high-energy ultraviolet rays to generate low-molecular compounds such as CO2 and H2O.
The invention has low investment cost, wide application range, high purification efficiency, simple operation, good deodorizing effect, stable equipment operation, small footprint, low operating cost and no secondary pollution during use.
8. Low temperature plasma method
The plasma generates electrons, ions, free radicals, excited molecules, and other highly active particles. Pollutants in the exhaust gas react with these active groups with a higher energy, and are eventually converted into substances such as CO2 and H2O, thereby achieving the purpose of purifying the exhaust gas.
Wide range of application, high purification efficiency, especially suitable for multi-component malodor and organic waste gas which are difficult to handle by other methods, small equipment footprint; high electronic energy, can interact with almost all malodor and organic waste gas molecules. Relatively low operating cost ; Quick response, stop quickly, open anytime
However, when the concentration of water, dust and organic waste gas is too high, it is easy to explode, and the one-time investment cost is high.
How to solve the exhaust pollution of spray booth related recommendations: exhaust treatment of spray booth
How to solve the exhaust pollution in the spray booth? 废气处理方案，宇晨除尘设备厂家根据企业废气数据和工程实施经验，制定废气处理工程设计方案。 Specific exhaust gas treatment plan of paint spraying room , Yuchen dust removal equipment manufacturer formulated exhaust gas treatment project design plan based on enterprise exhaust gas data and project implementation experience. Welcome to call 400-622-6298!