Cleaning the Air from Drip Aerosols
One of the aspects of protection of the atmosphere from the effect of industrial enterprises emitting polluting substances in the form of aerosols, for cleaning of which it is necessary to provide cleaning devices is considered; devices and methods used now for treatment of emissions depending on the dispersity of aerosols are presented. Special attention should be paid to cleaning emissions from the highly dispersed aerosol (particle size is less than 1 micron). Advantages and disadvantages of existing devices for cleaning of ventilation emissions from the highly dispersed drip aerosol, especially at the presence of a liquid disperse phase, are identified. The production of PVC-linoleum with heating of a polymer composition and emission of plasticizer aerosol is an example of production with the highly dispersed drip aerosol emission. The urgency of development of highly efficient devices for purification of vent emissions from drip aerosols of submicron sizes is substantiated. The development of devices for air cleaning from the highly dispersed drip aerosol is bases on features of the turbulent motion in thin tubes and slit channels. The main forces and phenomena that contribute to the process of deposition of highly dispersed particles in tubes and slit channels are revealed. Conducted theoretical and experimental studies made it possible to develop three types of drip aerosol separators. The comparative economic analysis of the use of the developed tilted-plate separator of drip aerosol, electrostatic filter of FES type, and mechanical cleaning filter of FMS type is made; the analysis shows that the use of developed devices gives the best economic effect.