Laser cutting technology has been widely used in modern manufacturing, but the exhaust gas pollution generated during the laser cutting process has become a serious problem. This article will elaborate on the composition, hazards and treatment methods of laser exhaust gas. It mainly includes physical adsorption method, chemical absorption method, catalytic oxidation method, plasma catalytic oxidation method and other methods, and various methods are compared and analyzed. Through the introduction of this paper, it can provide a certain reference for the treatment of laser cutting exhaust gas.
1. Composition and hazards of laser exhaust gas
Laser cutting technology is an efficient and processing method, but the exhaust gas generated in the cutting process mainly includes harmful gases such as CO, CO2, NO, NO2, SO2 and solid particles such as smoke and dust. These exhaust gases have certain hazards to human health and the environment, such as CO and NO2 and other harmful gases will cause harm to the human respiratory system, SO2 and soot and other solid particles will cause pollution to the atmospheric environment.
Second, the treatment method of laser exhaust gas
1.Physical adsorption method.
Physical adsorption method refers to the use of adsorption materials to adsorb pollutants in the exhaust gas, and commonly used adsorption materials include activated carbon, molecular sieves, etc. This method has the advantages of simple operation and low cost, but the adsorbed material is easy to be saturatedChemical absorption.
Chemical absorption method refers to the use of absorbent to absorb pollutants in the exhaust gas, commonly used absorbents include NaOH, CAO, etc., low exhaust gas emission concentration and other advantages, but the operation is complex, and the absorbent needs to be replaced regularly.
3.Catalytic oxidation.
Catalytic oxidation refers to the use of catalysts to oxidize organic substances in exhaust gas, and commonly used catalysts include metal oxides such as copper and iron. But the catalyst is easily deactivated, 4Plasma-catalyzed oxidation.
Plasma catalytic oxidation refers to the use of plasma technology to oxidize the organic matter in the exhaust gas, but the equipment cost is high and the operation is complex.
3. Compare and analyze various methods
Compared with the above methods, the chemical absorption method and catalytic oxidation method have higher purification efficiency, but the operation is complex and the equipment investment is large. The cost of physical adsorption method is low, but the adsorption material is easy to be saturated, and the plasma catalytic oxidation method has high purification efficiency, but the equipment cost is high and the operation is complex. Therefore, in practical application, it is necessary to choose the appropriate treatment method according to the actual situation.
To sum up, for the treatment of laser cutting waste gas, physical adsorption method, chemical absorption method, catalytic oxidation method, plasma catalytic oxidation method and other methods can be used. Different methods have their own advantages and disadvantages, and it is necessary to choose the appropriate method according to the actual situation in practical application. For laser cutting enterprises, purifying exhaust gas is not only an environmental protection task, but also a necessary measure to optimize the production process and improve product quality.