printing waste gas usually consists of highly volatile organic waste gases such as benzene, toluene, xylene, acetone, butanone, lipids and ethers. The two-phase suspension formed after volatilization or atomization of solid materials and solvents escapes into the surrounding air and pollutes the air. Therefore, effective collection and purification are needed to ensure the safe operation of the enterprise and personnel health, improve the environment of the workshop and plant area and meet the national environmental protection requirements. Among organic solvents, toluene and xylene have carcinogenic effects. Other organic solvents such as benzene, esters and ketones have varying degrees of pollution to the environment, affect human health and waste resources
in China’s occupational exposure limits and emission standards for hazardous factors in the workplace, strict provisions are made on the emission of VOCs. If a reasonable waste gas collection system and solvent recovery device are installed in the printing workshop, VOCs volatilization can be reduced. The waste gas pollutants from the waste gas treatment of printing workshop and printing plant come from the ink, solvent, diluent and pigment in printing processes such as printing and inking, and the organic waste gas volatilizes continuously in the process of inking, printing and curing. 70% of them come from the ink waste gas generated in the process of printing and inking
how to better deal with the organic solvents in the exhaust gas from printing, compounding, coating and painting has become an urgent problem to be solved in the printing and packaging industry. At present, VOC treatment methods and printing plant waste gas treatment methods include adsorption condensation method, absorption dissolution method, reaction combustion method, photocatalytic oxidation method, plasma treatment method, combination method and so on.
printing plants and printing and dyeing plants will produce a lot of pollution dust and gas in the production process, causing damage to the environment. How to deal with the industrial waste gas generated by printing plants
Linsen suggests that spray waste gas purification tower equipment can be used. Different chemicals can be used for different waste gases. The waste gas treatment of printing and dyeing plant is customized, which can be suitable for the treatment of pollutants with high concentration and difficult biodegradation. The treatment effect is high. The waste gas treatment equipment of printing plant generally adopts the methods of acid-base neutralization and conversion into harmless salts, When the dusty gas with a certain air inlet speed enters through the air inlet pipe, it impacts the water layer and changes the movement direction of the gas, and the two dust particles continue to move in the original direction due to inertia
most of the dust particles stay in the water after adhering to the water. After the impact water bath, a part of the dust particles move with the gas, combine with the impact water mist and the circulating spray water, and further fully mix in the waste gas purification tower. The printing and dyeing waste gas treatment is installed. At this time, the dust particles in the dusty gas are captured by the water, the dust water diameter is centrifuged or filtered off, and flows into the circulating pool through the tower wall, The purified gas is discharged, the wastewater is recycled after medium diameter dosing treatment in the circulating tank, and the sediment is cleaned and transported out regularly.
printing waste gas usually contains highly volatile organic waste gas such as benzene, toluene, xylene, acetone, butanone, lipids and ethers, which is very harmful to the environment and human body. Wanchuan environmental protection UV photolysis purifier and activated carbon adsorption tower can be used for treatment.
in the deodorization process: firstly, it is recommended to pretreat the waste gas with water spray tower. When the gas enters the water spray tower, the dust, smoke and acid-base waste gas in the gas are removed by water washing, and they are washed into the circulating water below the spray tower, so as to solve the problem of odor. The treated waste gas is discharged through the chimney, but the circulating water collects ink The volatile substances of the cleaning agent will also produce secondary pollution if the water is not changed frequently for a long time. Therefore, the deodorant of printing and dyeing wastewater needs to be added at the port of the water tank to intercept the secondary generation of odor and enhance the deodorization effect of the spray tower. After adding deodorant, it will not harm human body and will not affect the equipment.