UV photolysis treatment process of spraying waste gas

Time:2017-09-26 17:31
The paint waste gas is produced on the paint spraying stage of the workpiece, and the paint ejected by the high-pressure air is mostly left on the workpiece, and the other is taken out with the exhaust gas to form paint fog dust. These dust content is not high, the particle size is small, most of the below 10 mu m, if untreated, directly into the UV photolysis purification equipment, will block the UV tube emission energy, affect the processing effect.
The process flow chart is as follows:
Lacquering through spray scrubber purifying treatment, because of the spiral intake and in advanced atomization, full contact liquid, paint particles of fine dust, exhaust gas without solidification and a small amount of organic waste gas is absorbed by the washing liquid waste gas by washing Taneisi mesh demister after dehydration into dry powder filter, the depth of treatment of dust. To ensure complete removal of dust in exhaust gas.
Lacquering process, lacquering after washed Taiwan painting to remove resin particles, the waste gas washed Taiwan painting after treatment with exhaust fan into the packed tower under the normal temperature and pressure, packing absorption tower used for diesel oil or lubricating oil 5 ~ 10; absorbent concentration reached 10-30% when replacing the absorbent; when the absorbent absorption of organic waste gas concentration to 10-30% into the distillation kettle fractionation, collection 160 DEG C fraction, is the use of thinner, after absorption to distillation treatment after cooling agent back to the storage tank standby. The process used in handling equipment, waste gas collecting cover to the packed tower inlet pipeline is arranged on the exhaust fan; the absorption towers and pipes is arranged on the lower part of the absorption liquor storage tank, the absorption towers set the upper pipe and the absorption liquor storage tank, the pipeline is equipped with a circulating pump.
The waste gas treated by the packed absorption tower then enters the UV high efficiency photolysis purification equipment to do further deodorization and odor removal treatment to achieve the standard discharge.
Principle of UV photolysis purification:
A, the product with special high ozone UV ultraviolet beam irradiation of malodorous gases, malodorous gases such as ammonia, pyrolysis of trimethylamine, hydrogen sulfide, dimethyl sulfide hydrogen, methyl mercaptan and dimethyl sulfide, two methyl two sulfur, carbon disulfide and sulfide H2S, styrene, VOC, benzene, toluene, molecular bonds, the a pollutant molecules and ozone oxidation free state with small molecular compounds into harmless or less harmful, such as CO2, H2O etc..
Two, the use of high energy and high ozone UV ultraviolet beam decomposition of oxygen molecules in the air to produce free oxygen, that is, reactive oxygen species due to free oxygen carrying positive and negative electron imbalance, so the need to combine with oxygen molecules, and then produce ozone.
UV + O2 = O-+O * (reactive oxygen) O+O2 = O3 (ozone), as we all know, ozone has a strong oxidation of organic compounds, and has an immediate scavenging effect on malodorous gases and other irritating odors.
Three, the use of foul gas exhaust equipment into the purification equipment, purification equipment using high energy UV light beam and the odor of ozone decomposition CO oxidation reaction of the malodorous gases into the material degradation of low molecular compounds, water and carbon dioxide, and then exhausted to the outside through the exhaust pipe.
Four, using high-energy UV beams to break the molecular bonds of bacteria in malodorous gas, destroy the nucleic acid of bacteria (DNA), and then oxidize by ozone, and completely achieve the purpose of deodorization and killing bacteria
Product performance review
In addition, a high efficient odor removal of volatile organic compounds (VOC), the main pollutants of inorganic compounds, ammonia, hydrogen sulfide, mercaptans, and odor, deodorization efficiency up to 99% or more, the deodorization effect greatly exceeded the national emission standard of odor pollutants issued in 1993 (GB14554-93).
Two, no need to add any substance: only need to set the corresponding exhaust duct and exhaust power, so that odor gas through this equipment for deodorization, decomposition and purification, without adding any substance to participate in chemical reactions. ,
Three, adaptability: can adapt to high concentration, atmospheric quantity, different odor gas material deodorization purification treatment, can work 24 hours every day, continuous operation, stable and reliable.
Four, low cost of operation: This equipment without any mechanical action, no noise, no special management and daily maintenance, only for regular inspection, the low energy consumption equipment (every 1000 cubic meters / hour, consumes only about 0.2 degrees of electricity), equipment drag is lower than 50pA, can save a large amount of exhaust wind power consumption.
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