Application of Local Exhaust Ventilation System and Integrated Collectors for Control of Air Pollutants in Mining Company

Abstract

Abstact: Local exhaust ventilation (LEV) systems and integrated collectors were designed and implemented in a mining company in order to control emitted air pollutant from furnaces. The LEV was designed for capture and transition of air pollutants emitted from furnaces to the integrated collectors. The integrated collectors including four high efficiency Stairmand model cyclones for control of particulate matter, a venturi scrubber for control of the fine particles, SO 2 and a part of h 2 S to follow them, and a packed scrubber for treatment of the residual h 2 S and So 2 were designed. Pollutants concentration were measured to determine system effectiveness. The results showed that the effectiveness of LEV for reducing workplace pollution is 91.83%, 96.32% and 83.67% for dust, So 2 and h 2 S, respectively. Average removal efficiency of particles by combination of cyclone and venturi scrubber was 98.72%. Average removal efficiency of SO 2 and h 2 S were 95.85% and 47.13% for the venturi scrubber and 68.45% and 92.7% for the packed bed scrubber. The average removal efficiency of SO 2 and h 2 S were increased to 99.1% and 95.95% by the combination of venturi and packed bed scrubbers. According to the results, integrated collectors are a good air pollution control option for industries with economic constraints and ancient technologies.

A cross-sectional analysis of respiratory ill-health among charcoal workers and its implications for strengthening occupational health services in southern Nigeria

“…Measures for isolating wood smoke at the source were absent at all sites; thus workers probably breathed in wood smoke from the burning kilns. On the contrary, earlier studies have demonstrated that local exhaust ventilation can efficiently purify contaminated air, and its consistent application has effectively decreased workplace hazards below the threshold limit value 38 39. In addition, health and safety information is indispensable for ensuring a safe work environment and developing educational materials for workers can reduce the risk of work-related injuries;40 nevertheless, no educational material was displayed at any of the sites.…”

The simulation of the emission of iron fumes caused by shielded metal arc welding using a computational fluid dynamics method

“…Gustav Nyrenstedt also stated that the fumes moved up the electrode and the electrode holder and therefore the suction hood could be set at any height along the electrode (Nyrenstedt, 2016). Local exhaust ventilation, according to Ghorbani Shahna et al, is one of the most effective strategies to remove contaminants from reverberatory furnaces and heated sources (Ghorbani Shahna et al, 2012). It has been found, as a result of research carried out by Memon and colleagues, that the velocity of the material is linked to the amount of heat that is generated (Memon et al, 2021).…”

The Efficacy of Local Exhaust Ventilation (LEV) System Controls on Aerosols Exposures during Aluminium Cans Production

“…A hypersensitive state in the airways around the human respiratory system may attack the worker's even at low levels of polluted air exposures. The occurence occur cause by initial working conditions which are exposed to repeated and long-term exposure to polluted air [3,4]. Heavy exposure to dust, fume or other airborne contaminants in a confined space may result in acute and chronic diseases.…”