Abstract
The design of an integrated ventilation system, which combines local exhaust ventilation of welders' workplaces and general ventilation of premises, is considered. Thefields of air mobility, its temperature and concentration of harmful impurities are calculated using the method of computer modeling. A comparative analysis of the main types of stationary devices for local exhaust ventilation of electric welding workstations (exhaust hoods, welding panels, as well as blowers) is performed. The conditions for the effective use of lift-and-turn suction pumps have been determined. The factors influencing the efficiency of their work have been identified, and combinations of influencing factors have been established that ensure the maximum permissible concentration of harmful emissions in the working areas of welders. The conditions under which the general exchange effect of local suction is sufficient to maintain the concentration in the room at the level of maximum permissible concentrations (MPC) have been determined. The results obtained can be used to develop engineering methods for calculating and optimizing ventilation devices and systems, as well as to analyze structural and design solutions for the ventilation device of electric welding industries.
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