Mobile welding and grinding purification air environmental protection filter manufacturer

Point exhaust is to remove welding fumes directly from the vicinity of the welding arc area. Point exhaust forms include large air volume low pressure systems, small air volume high pressure systems, mobile welding smoke purifiers, etc. The exhaust volume and wind speed of the point smoke exhaust unit must be appropriate. If the air volume is too small, it cannot be pumped out. If the air volume is too large, the protective atmosphere will be destroyed and the welding quality will be affected. When using point exhaust, the amount of protective gas should be increased accordingly. Local exhaust is to suck the smoke directly from the welding point, including ventilation hood, blowing and suction type, pit exhaust type, etc. This method is mainly used when the welding workpiece is small, the welding station is relatively fixed, or it moves within a small range, and there is no crane above the workshop station. See figure, figure.
The local blowing and suction type is mainly used for welding inside closed containers with two-way openings, which uses one side to blow and one side to suck the smoke. In the manufacturing process of large containers, smoke exhaust ventilation for welding workers in the containers is widely used.
The pit smoke exhaust type is mainly used for under-table ventilation and smoke exhaust devices such as gas cutting machines. Recently, water cutting workbenches are used to collect plasma cutting smoke and dust to purify the air.
The welding workshop must adopt full room ventilation if it meets the following conditions
The welding station cannot be fixed, and point exhaust and local exhaust methods cannot be used
Only some welding stations are equipped with spot exhaust and The local smoke exhaust method cannot ensure that the smoke concentration in the workshop remains within the allowable range.
The purpose of whole-room ventilation is mainly to introduce fresh outdoor air to dilute the concentration of welding fume in the indoor air, so that the average concentration of welding fume in the work area is controlled below the allowable standard. From the perspective of air balance, as much fresh air needs to be introduced as much indoor air containing welding fumes must be discharged. In this way, fresh air is continuously introduced and indoor polluted air is continuously discharged, thereby taking away the welding fumes that are constantly generated indoors. .
Whole room ventilation is also divided into organized natural ventilation and mechanical ventilation.