Characteristics of carbon steel welding fume control technology

The development of industrial production will bring about some environmental pollution. This article focuses on the hazards caused by a large amount of smoke and dust generated in the carbon steel welding process, and how to choose a suitable carbon steel welding smoke and dust treatment method, especially in the concentration of welding stations and automatic robots. The key to smoke and dust control is how to set up the smoke and dust capture on the scene where the welding smoke is large, the manual continuous welding time is long, and there is crane hoisting or cantilever crane work.

Occupational exposure limit is the exposure limit value of occupational harmful factors, which refers to the allowable exposure level of workers who cause acute or chronic harmful health effects on the body caused by long-term repeated exposure during occupational activities. Therefore, the welding environment must use various methods to control the harmful gases and dust generated during the welding process to meet the requirements of occupational health and safety.

Characteristics of welding fume control

Because the indoor air pollution and atmospheric air pollution in the workshop are in different environments, their pollution characteristics are also different, and the following points for the treatment of welding fume are:

(1) The labor protection method is to protect the health of workers by equipping the dust mask. The protection object of this method is limited to welding workers, and the whole workshop environment cannot be improved.

(2) The local dust removal method is to directly treat the area with high concentration of welding fumes. The local dust removal equipment consists of two parts: the soot catching part and the soot filtering part. The local dust removal method can effectively prevent the unorganized airflow from driving the diffusion of pollutants in the space, and consumes less air.

(3) The local dust removal method is restricted, the workpiece is large, the welding area is long, and the welding range is large. The upper part needs to be driven or cantilevered to move the workpiece. The tight welding conditions in the work site cannot be achieved by local treatment methods. The technology of layered air supply for overall treatment of welding fume can meet its requirements for fume control.

The layered air supply has many advantages for the overall treatment of welding fume: ①The capture of fume is not directly aimed at the fume-producing part, so the dust removal system is not affected by the size of the welding workpiece, and is not affected by the change of the welding station. ②Using high-efficiency filters, the filtering accuracy fully meets the indoor emission standards, effectively improving the working area environment. ③ Thoroughly solve the problem of smoke and dust purification, and will not cause secondary pollution to the atmosphere. ④The required air volume is only half of the traditional mixed air supply form, and the operating energy consumption is greatly reduced. ⑤Because the smoke and dust can reach the indoor emission standard after filtering, the indoor air can be circulated to avoid the waste of indoor cold/heat energy caused by direct exhaust. ⑥ The dust removal system is not affected by the operator's habits, and the operator is not disturbed by the dust removal system during the work process, which can greatly improve production efficiency. ⑦High degree of automation, PLC control, friendly man-machine interface, easy to use.

In short, with the wider application of aluminum alloy welding, the various hazards caused by aluminum alloy welding are more and more recognized. The treatment of aluminum alloy welding fume can improve the humanistic environment and improve the welding process. All are necessary.