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Manifestations of governance technical problems of welding fume processing equipment


The treatment of welding fume processing equipment is an international technical problem, and its difficulties are mainly reflected in the following aspects:

1. Welding fume has a small particle size, its particle size is 0.01 ~ 5μm, it is difficult to filter out;
2. The variability of the welding station makes it difficult to capture welding fume;
3. Welding smoke and hot air retention characteristics, ordinary ventilation technology is difficult to remove dust;
4. Welding fume dedusting equipment has large investment, high operating cost, and difficult investment.
Welding dust removal is divided into local dust removal and overall plant welding dust treatment.
The local dust removal plan is to directly address areas with high concentrations of welding fumes. The local dust removal equipment consists of two parts: the soot capture part and the soot filter part. The local dust removal method can effectively prevent the fugitive air flow from promoting the diffusion of pollutants in the space and consume less air. For the welding workshop, there is manual welding with a fixed workbench. The local exhaust hood can basically remove the welding fumes. Local ventilation can be used to achieve better treatment results. The investment is small and the effect is remarkable. However, it is greatly restricted by the site layout, operator habits and equipment movement space.

Main problems to be solved in welding fume control

1. Hazard caused by excessive indoor smoke concentration to human health Smoke in welding fume is a very complex substance, and more than 20 elements have been found in smoke. The harmful fumes during carbon steel CO2 / MAG welding are mainly Fe2O3, SiO2, MnO, etc. The main fumes during aluminum MIG welding are Al2O3 particles. Some harmful gases such as ozone and nitrogen oxides are also generated during welding , Carbon monoxide, fluoride and chloride. Workers work in welding fumes for a long time. Without proper protective measures, it will lead to various occupational diseases, such as pneumoconiosis, osteomalacia, and anemia. Harmful gases can also cause pulmonary edema, bronchitis, acute asthma, neurasthenia, and chronic respiratory inflammation.
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