초록 ▼

A mixture of air and particles to be classified is ejected through a nozzle located at a lower portion of a vertical housing to deposit the ejected particles on an inner surface of the housing and to convey separated fine particles by a whirling upward air flow. Air is ejected radially beneath the n

A mixture of air and particles to be classified is ejected through a nozzle located at a lower portion of a vertical housing to deposit the ejected particles on an inner surface of the housing and to convey separated fine particles by a whirling upward air flow. Air is ejected radially beneath the nozzle to separate fine particles from the particles deposited on the inner wall and to convey upward the separated fine particles by the whirling upward air flow and to cause the coarse particles to fall down to the outside of the housing. A rotating disc with vanes is disposed in an enlarged upper portion of the housing to separate and classify said fine particles from the whirling upward air flow. The air conditioning the remaining fine particles is conveyed to a cyclone separator to separate the remaining fine particles. Preferably, the air discharged from the cyclone separator is circulated again through the housing and the cyclone separator.

대표청구항 ▼

A particle classifying apparatus comprising: (a) a vertical cylindrical housing comprising a side wall defining an inner surface and having an upper portion and a lower portion; (b) a first pipe means for introducing into said housing air containing particles to be classified; (c) a nozzle means pro

A particle classifying apparatus comprising: (a) a vertical cylindrical housing comprising a side wall defining an inner surface and having an upper portion and a lower portion; (b) a first pipe means for introducing into said housing air containing particles to be classified; (c) a nozzle means provided in said lower portion of said housing and connected to an upper end of said first pipe means for converting said air containing said particles into an upward whirling flow; (d) means provided in said upper portion of said housing for separating fine particles from said upward whirling flow and discharging said particles out of said housing through an upper opening with remaining particles, mainly consisting of coarse particles and containing some fine particles which have not been separated by said fine particle separating means, descending along said inner surface of said housing; and (e) a second stationary pipe means extending into said housing through said side wall thereof beneath said nozzle means, said pipe means terminating as an outlet spaced from said side wall and directed at said side wall, said pipe means injecting air which is subsequently ejection against said inner surface of said housing, thereby separating and blowing upwardly fine particles present in said descending particles effecting further particle classification, the remaining coarse particles descending along said inner surface of said housing and being discharged out of said housing through a lower opening.