Reducing fire hazard of industrial aspiration systems by using a multi-cassette tubular dust collector

Purpose. Industrial production has been using inertial dust collectors for a long time to ensure explosion and fire safety. Their designs are regularly improved, but they are not effective enough for finely-dispersed dust and therefore their use in rooms with corresponding technological processes may be unsafe. When using a multi-cassette tubular dust collector the process of converting combustible dust from an air suspension to an aerogel occurs intensively. Due to this the fire hazard in industrial conditions can be reduced. Methods. The article analyzes the shortcomings of inertial dust collectors from the point of view of fire safety; an experimental method is used - dust concentration is measured by the external flow filtration method; the obtained data are generalized and approximated. Findings. During the work experimental dependences of cleaning efficiency on the design features of the dust separator (diameter of the cassette tubes, number of cassettes) were obtained, confirming the efficiency of the developed design, which in turn ensures a reduction in fire hazard. Research application field. The results can be used in industrial aspiration systems at industrial enterprises. Conclusions. In the course of the scientific work described in the article, the need to improve the designs of inertial dust collectors to ensure a sufficient level of fire safety was substantiated. A new tubular dust separator was developed, capable of performing step-by-step cleaning from dust of different dispersion. To substantiate the efficiency of the device, a laboratory stand was created, including a model of a multi-cassette tubular dust separator. The obtained experimental dependences of dust collection efficiency on the device parameters allowed us to draw a conclusion about the optimal design that ensures fire safety.