Spray painting factory exhaust gas treatment system - spray painting exhaust gas treatment equipment

Composition of spray paint exhaust gas:

Spray painting exhaust gas comes from the volatilization of organic solvents and diluents used in spray painting operations. Its main components are benzene, toluene, xylene, hexane, heptane, ethyl acetate, carbon tetrachloride, etc.

HuashuiSpray painting factory exhaust gas treatment systemPrinciple:

1. Activated carbon has many micropores and a large specific surface area. By relying on molecular gravity and capillary action, it can adsorb solvent vapor and volatile substances on its surface. Depending on the boiling point of different substances, the adsorbed substances can be precipitated by steam. When steam is used as the desorption medium, the organic solvent vapor desorbed is condensed together with water vapor through a condenser and enters a separation tank for separation before recovering the organic solvent. The residual liquid is discharged after aeration treatment.

2. This device is designed based on two basic principles: adsorption (high efficiency) and catalytic combustion (energy saving). It adopts dual gas path continuous operation, with one catalytic combustion chamber and two adsorption beds alternately used.

3. Firstly, the organic waste gas is adsorbed onto activated carbon, and when it reaches saturation, the adsorption is stopped. Then, the organic matter is desorbed from the activated carbon using a hot gas flow to regenerate the activated carbon; The detached organic matter has been concentrated (with a concentration several tens of times higher than before) and sent to the catalytic combustion chamber for catalytic combustion into carbon dioxide and water vapor, which are then discharged.

4. When the concentration of organic waste gas exceeds 2000PPm, the organic waste gas can maintain spontaneous combustion in the catalytic bed without external heating. Part of the exhaust gas after combustion is discharged into the atmosphere, while the majority is sent to the adsorption bed for activated carbon regeneration. This can meet the heat energy requirements for combustion and adsorption, achieving the goal of energy conservation.

5. After regeneration, it can enter the next adsorption; During desorption, purification can be carried out using another adsorption bed, which is suitable for both continuous and intermittent operations.

What users need to know when selecting waste gas treatment equipment for Huashui Spray Painting Factory:

1. The inlet temperature of the exhaust gas of the device should be below 50 ℃. If the exhaust gas exceeds 50 ℃, an air cooling device should be added and cooled before entering the adsorption tank.

2. For the purification of exhaust gases containing a large amount of particulate dust generated during painting operations, the particulate matter should be filtered and purified first.

3. When the boiling point of the adsorbed organic solvent is high (above 120 ℃), a steam filter can be used to increase the desorption steam temperature

4. If there is no steam supply, a small electric steam generator can be specially equipped with the purification device.

Characteristics of Waste Gas Treatment Technology in Huashui Spray Painting Factory:

(1) This project does not consider land acquisition and utilizes the original factory land, which cannot seriously affect production;

(2) Adopting mature exhaust gas treatment processes, requiring safe, reliable, and economically reasonable technology;

(3) The handling of by-products should not generate secondary pollution;

(4) All equipment and materials are new;

(5) Easy observation, monitoring, and maintenance;

(6) Ensure the safety of personnel and equipment;

(7) Save energy, water, and raw materials;

HuashuiSpray painting factory exhaust gas treatment systemIntroduction to Process Flow:

(1) The exhaust gas collected by the gas collection hood is introduced into the air ductspray towerRemove viscous particles from the exhaust gas, and then reduce water vapor through a defogger before entering the next process.

(2) The exhaust gas enters the core purification system（UV photolysis purification equipment)，UV photolysis purification equipmentA specially designed high-energy UV ultraviolet beam is emitted to decompose oxygen molecules in the air, producing free oxygen (i.e. reactive oxygen species). At the same time, the high-energy UV ultraviolet beam and ozone synergistically photodecompose and oxidize organic waste gas and odors, degrading and converting odorous substances into low molecular weight compounds, water, and carbon dioxide, achieving high-altitude emissions standards.

Company Profile:

Suzhou Weitesi Environmental Protection Technology Co., Ltd. is a predecessor of Jiangsu Huashui Environmental Protection Equipment Co., Ltd. The company was established in November 2013 and relies on well-known domestic and foreign enterprises and institutions such as ECOLOD Odor Control International in Canada and Shanghai Jiao Tong University to specialize in waste gas treatment for industrial and mining enterprises; Industrial wastewater and household waste odor control; Control of air disinfection, dust removal, odor removal, etc. inside buildings. To provide users with comprehensive and systematic services including production and supporting of environmental air treatment products and equipment, technical consultation, project design, equipment research and development, system installation, after-sales support, etc. Welcome all users to call or write to inquire, we will be dedicated to serving you!