1、 Overview of Spray Paint Exhaust Gas Spray painting technology is widely used in industries such as machinery, electrical equipment, household appliances, automobiles, ships, furniture, etc. Spray paint raw materials—Coatings are composed of non-volatile matter and volatile matter. Non volatile matter includes film-forming substances and auxiliary film-forming substances, while volatile matter refers to solvents and diluents (mainly xylene).
The organic gases in the spray paint exhaust come from the volatilization of solvents and diluents. Organic solvents will not adhere to the surface of the spray paint and will be completely released during the spray paint and curing process to form organic exhaust gas. The amount of xylene waste gas evaporated during the spray painting process accounts for about% of the amount of diluent used30%Additionally, there is70%Volatile during the drying process. The hazards of spray painting include the release of two-phase suspended particles formed by the atomization of paint and solvents during spray painting operations into the surrounding air, which pollutes the air. Spray paint particles are easily inhaled into the lungs,Harm to physical health,Mild cases can cause discomfort, headaches, dizziness, nausea, vomiting, loss of appetite, and lack of concentration, while severe cases can cause varying degrees of toxicity to the respiratory, circulatory, digestive, and reproductive systems. Paint contains various organic solvents such as benzene, toluene, and xylene, which pose great harm to human hematopoietic function. It is the main cause of inducing aplastic anemia and leukemia (commonly known as blood cancer), and can also affect female reproductive ability, leading to congenital defects in fetuses. Aromatic compounds such as benzene, toluene, styrene, etc. can also cause distortion and cancer in the human body. During the paint spraying process, mist like paint particles and organic solvents in the paint will evaporate from the paint spraying plant and be discharged outside the paint spraying room through mechanical exhaust methods, such as water bath paint washing and activated carbon adsorption of some benzene organic waste gases. This will cause serious pollution and harm to the surrounding ecological environment. The continuous release of carcinogenic substances such as benzene and formaldehyde from the paint spraying workshop can cause serious pollution to nearby residential areas, causing significant harm to human health and endangering life.

2、 Spray painting exhaust gas treatment technology

The collection and separation of paint mist in polluted air is the main method to improve painting quality, enhance painting environment, and meet environmental emission requirements.
Paint spraying exhaust gas is mainly composed of2Partial composition, one is liquid paint mist, and the other is gaseousVOCFor liquid paint mist, a paint mist removal device should be used; But for insoluble waterVOCMature industrial technology is“Coarse effect paint mist filter+Photocatalytic oxidation desorption combined exhaust gas purification system”The second is to adopt“Coarse effect paint mist filter+Organic absorption composite liquid spray tower combined exhaust gas purification system”The waste liquid is treated by our company's proprietary technology and reused without being discharged.

1Coarse effect paint mist filter: The paint mist collection filter is suitable for filtering solid or liquid particles in the airflow, such as paint; Polyester adhesive; Asphalt (bitumen); plastic cement; Asphalt coating; Iron Furong; Epoxy resin; Porcelain veneers; Dyes; Precision ceramics; Air dried porcelain; Oil; Liquefied workpieces; Glass raw materials; Clear varnish, etc. Under the suction of the fan, the exhaust gas enters the paint mist collection filter through the suction hood and air duct. When passing through the filtering device, the particles in the paint mist are intercepted and collide to form inert separation, which accumulates the paint mist particles in the paint mist collection filter and plays a collecting role. The air is discharged through the outlet;

2Photocatalytic oxidation purification device
Due to the regenerative nature of activated carbon, in situations where the amount of activated carbon used is large, the concentration of exhaust gas is high, and the adsorption saturation time of activated carbon is short, an activated carbon desorption device can be used to regenerate and recycle the activated carbon (steam can be used as the desorption medium). The use of activated carbon desorption devices can not only save operating costs, but also recover the adsorbed exhaust gas, while avoiding secondary pollution. In the absence of solvent recovery, a photocatalytic oxidation activated carbon regeneration device can also be used to regenerate and recycle activated carbon. The nano photocatalytic catalyst material in the core of the device（GC-100）It is a substance that can undergo catalytic reactions on its surface after absorbing light energy, and its function is similar to that of chlorophyll in plants. When specific nano wavelength ultraviolet light is irradiated on photocatalytic catalytic materials（GC-100）At this time, photocatalytic oxidation-reduction reactions occur on its surface. Photocatalytic catalyst materials（GC-100）After absorbing photons, electrons are generated on its surface（E-）And holes（H+）Convert the absorbed light energy into chemical energy, which has photocatalytic activity.
When photocatalytic catalyst materials（GC-100）When in contact with water in the air, the surface adsorbsH2O、O2、OH-，H2O、OH-Being hollowed out（H+）Oxidized,O2Being Electronic（E-）Reduction, the reaction chamber is as follows:
H2O+ H+→OH. + H+ O2+ E-→O2-. OH—The oxidation ability of functional groups is strong, causing organic matter to oxidize and ultimately decompose into water andCO2.

3Organic absorption composite liquid spray tower device

The absorption method uses an appropriate liquid as the absorbent,Contact the waste gas containing "triphenyl" with absorbent,Absorb 'triphenyl' into the absorbent,Thus purifying the gas. During the absorption process,Based on whether there is a chemical reaction between the absorbed substance and the absorbent,It can be divided into physical absorption and chemical absorption,The former undergoes a pure physical dissolution process during absorption. Chemical absorption involves a chemical reaction between the absorbing substance and the absorbent during the absorption process,New compounds have emerged. The selection of solvents in the absorption method is an important factor in the treatment of "triphenyl" waste gas.

The composite absorption method for purifying complex organic waste gas technology involves preparing composite solution absorbents by distributing active groups in water, which improves the efficiency ofVOCsPurification technology for complex organic waste gases with high absorption efficiency. Due to the physical and chemical synergy in absorption reactions, the absorption efficiency is high and suitable for handling various concentrations, air volumes, dust particles, inorganic substances, and oil mistVOCsWaste gas. At present, this technology is applied in various waste gas treatment projects such as organic waste gas in spraying workshops.

Organic solvent waste gas and its components are relatively complex, including aromatic compounds such as benzene, toluene, xylene, styrene, etc; Ketones: Acetone, Cyclohexanone, Methyl Ethyl Ketone, etc; Esters: ethyl acetate, butyl acetate, methyl isoacetate, banana water, etc; Alcohols: methanol, ethanol, butanol, isopropanol, etc. The waste gas generated during the production process often has complex and diverse components, and the degree of damage to human health varies according to this characteristic. In order to better address the impact of organic solvents and organic waste gas on human health. Our company has been cooperating with multiple waste gas treatment companies for many years, absorbing foreign waste gas purification concepts and technologies. We have conducted long-term research and development, testing, and development of purification equipment and odor removal working fluids for organic waste gas and organic solvent waste gas, and ultimately developed low-cost waste gas purification products.

3、 Equipment specifications and models: Please refer to……Call the company's sales department

4、 Comparison of indicators and characteristics of various governance methods