METHOD FOR CLEANING OF SPENT INDUSTRIAL GASES FROM HARD PARTICLES TO PREPARE THEM FOR USE IN CLOSED CYCLE, PLANT FOR ITS REALISATION AND FILTERING DEVICE USED IN DEVICE Russian patent published in 2009 - IPC B01D50/00 B01D39/06 

FIELD: technological processes.

SUBSTANCE: inventions are related to facilities for community air protection and may be used for extraction of dust and hazardous admixtures from gas emission of factories, TPP, central heating boilers, etc. in order to use them repeatedly for burning in closed production cycle. Method for cleaning includes burning of spent gas in furnace, separation of coarse hard fraction in cyclone, deposition with the help of gas spraying with water in scrubber of products of gas and water reaction, separation of fine dust by means of filtration. Prior to filtration temperature of gas flow is stabilised, and filtration is carried out serially in three stages with further moisturising of filtered flow after every stage. Plant for cleaning of spent gases comprises the following components that are serially installed and technologically connected to each other - furnace for burning, chamber of cyclone type, scrubber with nozzles for gas irrigation by water, filtering device. Chamber of cyclone type is connected with collector of coarse hard fraction, and filtering device - with collector of liquid slag. Plant also comprises fan of atmospheric air injection and control device connected to nozzles for irrigation and filtering device. Filtering device is arranged out of three serially installed filtering units - inclined filters with controlled angle of inclination, flat filters and cylindrical filters. Outlets of every unit are connected to water evaporator. Every filter element consists of several serially installed, starting from external layer, alternating, applied one above another, functional layers: the first and second turbulent layers, the first overspeed layer, the first membrane layer, the third turbulent layer, the second overspeed layer, the second membrane layer, the fourth turbulent and fifth turbulent layers. The first and fifth turbulent layers are made of glass wool, the second - fourth turbulent layers - from glass wool impregnated with water, membrane layers - from glass wool, impregnated with compound, overspeed layers - from glass tissue.

EFFECT: simplification of cleaning facilities and improved cleaning quality, due to air enrichment with oxygen and restoration of oxides.

3 cl, 2 dwg