Waste gas treatment method for spray painting room

1. Spray booth exhaust gas treatment method one: water spray+adsorption method

Spray painting exhaust gas is generated during the spraying process, and liquid paint forms atomized dust particles and volatile organic hazardous substances such as triphenyl under the action of air pressure. The concentration is high, the particle size is small, and the vast majority are in the range of 10? Below m, if not pretreated, the micropores of activated carbon will quickly clog, rendering the activated carbon ineffective. After being cleaned by a water curtain cabinet, the spray paint exhaust gas has a good cleaning and degradation effect on the paint mist.

The exhaust gas enters the water spray exhaust gas treatment tower, and after further cleaning and treatment by the wet cyclone plate exhaust gas tower, it enters the activated carbon adsorption tower through a pressurized induced draft fan. The organic gas is adsorbed by the activated carbon in the bed, which is suitable for high flow and low concentration organic exhaust gas. The activated carbon adopts granular activated carbon with a specific surface area (adsorption area) of up to 500-1500m2/g, thus having high surface activated carbon and adsorption capacity.Waste gas treatment method for spray painting room

The low concentration organic gas emitted is adsorbed on its active surface and purified. The gas is discharged at high altitude through the external exhaust duct to meet the standard.Waste gas treatment method for spray painting room

2. Spray booth exhaust gas treatment method 2: water spray+photocatalysis+activated carbon adsorption

Spray painting exhaust gas is generated during the spraying process, and liquid paint forms atomized dust particles and volatile organic hazardous substances such as triphenyl under the action of air pressure. The concentration is high, the particle size is small, and the vast majority are in the range of 10? Below m, if not pretreated, the micropores of activated carbon will quickly clog, rendering the activated carbon ineffective.

After being cleaned by a water curtain cabinet, the spray paint exhaust gas has a good cleaning and degradation effect on the paint mist. The exhaust gas enters the water spray exhaust gas treatment tower, and after further cleaning and treatment by the wet cyclone plate exhaust gas tower, it enters the photocatalytic deodorization equipment through a pressurized induced draft fan. Under high-energy ultraviolet irradiation, it undergoes various reactions such as chemical bond opening and breaking of volatile organic compounds (photochemical reactions), and is degraded into CO2 and H2O Low molecular weight compounds are used to irradiate oxygen in the air with high-energy ultraviolet light to generate ozone. Ozone absorbs ultraviolet light to generate oxygen radicals and oxygen. Oxygen radicals react with water vapor in the air to generate hydroxyl radicals, a stronger oxidant that oxidizes organic waste gases such as alcohols, aldehydes, and carboxylic acids into inorganic substances such as water and carbon dioxide. After adsorption, the waste gas is purified and discharged into the atmosphere through pipelines to meet emission standards. To achieve purification effect, after the exhaust gas is decomposed by photocatalytic deodorization equipment, there is a pipeline reaction time of 3-5 seconds thereafter.