Modeling gas flows to assess the efficiency of vapor capture from industrial tanks

Purpose of research. Evaluation of the effectiveness and optimization of the developed local ventilation device using modern fluid modeling methods.

Methods. The study considers methods for modeling a complex technical system – an industrial bath, with separate functional units for trapping harmful evaporating substances and pressing them to the surface of the solution – a double-side suction and a boost system, respectively. For each subsystem, which cannot be described by a single mathematical apparatus, methods of complex potential of gas flows and computer modeling were used, followed by comparison and search for optimal results.

Results. The maximum height of trapping harmful substances above the surface of the bath solution is found, the condition for which takes into account the ratio of the amount of air evaporated from the bath solution and the total amount of air removed by the on-board suction. For the constructed model of an exhaust device from a bath for carrying out technological operations with metals, according to the developed utility model, a study of the movement of air flows was conducted and the effectiveness of the developed exhaust on-board suction was analyzed using computer modeling.

Conclusion. The study showed that the effectiveness of a complex supercharged local exhaust ventilation system, determined by the spread of harmful substances in the work area, can be assessed and improved using modeling methods that allow you to change the design of on-board suction systems, calculate and select the parameters of the elements, establish and analyze the principle of operation of the device model as a whole, affecting the effectiveness of removal of harmful substances.

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