UV paint exhaust gas treatment system

Abstract

The invention discloses a UV paint exhaust gas treatment system. The UV paint exhaust gas treatment system comprises a UV spray inlet, a UV tank, an active carbon catalytic combustion tank, an active carbon tank, a high-altitude exhausting chimney, a plurality of ultraviolet lamps, a filter bag, and a catalytic decomposition bed; the active carbon tank and the active carbon catalytic combustion tank are arranged in parallel via a technical pipeline; the active carbon catalytic combustion tank is provided with a desorption fan, the catalytic decomposition bed, and a flame arrester; the ultraviolet lamp and the filter bag are arranged in the UV tank; the ultraviolet lamps are arranged at the front segment of the UV tank; the filter bag is arranged at the back segment of the UV tank. According to the UV paint exhaust gas treatment system, ultraviolet ray irradiation is adopted for curing of viscous UV particles via ultraviolet lamp irradiation, and the filter bag is used for removing UV particles; VOC in exhaust gas is absorbed by active carbon; the UV paint exhaust gas treatment system is provided with the active carbon catalytic combustion tank for low temperature regeneration of active carbon; treatment efficiency is as high as 97%, and is higher than that disclosed in national exhaust gas discharge standards.

Description

technical field [0001] The invention relates to the field of environmental protection painting technology equipment, in particular to a UV paint waste gas treatment system. Background technique [0002] Exhaust gas from industrial activities is one of the sources of environmental pollution. The "combustion method" and "activated carbon adsorption method" are widely used in the treatment of harmful gas waste gas generated by the volatilization of oil-based paint during the construction process of spray painting. The former is not widely used due to the high cost, and the latter is one of the commonly used methods, but the biggest difficulty in application is that the benzene, toluene, xylene and other waste gases generated by the volatilization of construction paints and coatings contain sticky particles; sticky particles will cause activated carbon The oily particles of activated carbon in the absorption device stick together into blocks, which accelerates the secondary pol...

AI Technical Summary

Problems solved by technology

The former is not widely used due to the high cost, and the latter is one of the commonly used methods, but the biggest difficulty in application is that the benzene, toluene, xylene and other waste gases generated by the volatilization of construction paints and coatings contain sticky particles; sticky particles will cause activated carbon The oily particles of activated carbon in the absorption device stick together into blocks, which accelerates the secondary pollution; leads to the current situation of sneak discharge and direct discharge, which often causes great troubles to the supervision of the government environmental protection department and the operation of enterprises that produce and control pollution

[0003] In the prior art, a treatment process is as follows: spraying UV paint mist into the spray tower, washing the paint particles in the air through the leaf shower tower, and melting them into the water to remove them. After removing the paint particles in the air, the exhaust gas enters the activated carbon The box body, then absorb and remove the VOC (harmful gas) in the air, and then discharge it at high altitude, the treatment effect can reach 50%-70%; the disadvantages are: UV paint is insoluble in water, and the air after the spray tower is wet Yes, there are still paint particles, which will cause the activated carbon to get wet and the pores to be blocked. The ability of the activated carbon to absorb VOC is seriously reduced, and it is easy to be saturated, and then the activated carbon is blocked, causing the entire exhaust gas treatment equipment to fail! Activated carbon must be replaced frequently, resulting in a lot of solid waste, high use cost, high maintenance cost, and failing to meet national standards

[0004] Another treatment process is: spraying UV paint mist into the spray tower, through the spray tower, the paint particles in the air are washed with water, melted into the water to remove them, and after removing the paint particles in the air, enter the UV ultraviolet photo-oxygen catalytic box , decompose the VOC (harmful gas) in the air, and then discharge it at high altitude, the treatment effect can reach 60%-80%; the disadvantages are: the UV paint is insoluble in water, and the air after the spray tower is wet Some paint particles are easy to adhere to the UV lamp, blocking the ultraviolet rays from radiating outward, and the ability to decompose VOC drops sharply until it fails! The maintenance cost is high, the treatment effect is not good, and it cannot meet the national standard

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