TWO-STAGE DUST-COLLECTING SYSTEM Russian patent published in 2008 - IPC B04C9/00 B01D50/00 

FIELD: engines and pumps.

SUBSTANCE: system incorporates a fan, pipelines, fist and second whirlwind dust-collectors, each comprising a cylindrical casing with an upper tangential inlet branch pipe, a swirler communicating with the lower inlet branch pipe and an axial outlet branch pipe. The said system includes also a separator-concentrator comprising a cylindrical whirlwind chamber communicating with the inlet chamber furnished with the tangential inlet. The aforesaid whirlwind chamber houses an axial pipe to withdraw the lower concentration dust flow, the chamber outlet being arranged on the side opposite the whirlwind chamber inlet chamber. The said whirlwind chamber side surface accommodates a side branch pipe to withdraw the larger concentration dust flow. The dust collectors communicate with each other via the aforesaid concentrator-separator. The initial gas feed pipeline is connected to the first dust collector upper and lower inlet branch pipes and to concentrator-separator whirlwind chamber tangential inlet communicating with the first dust collector outlet branch pipe. The concentrator-separator whirlwind chamber axial pipe communicates with the second dust collector swirler, while the whirlwind chamber side branch pipe communicates with the second dust collector tangential inlet branch pipe, the said second dust collector axial outlet branch pipe being communicated with the fan suck-in branch pipe.

EFFECT: higher efficiency of gas purification.

3 dwg