Rotary flow separator for fine grain particles

Claim 2

A ROTARY FLOW PARTICLE SEPARATOR, COMPRISING: A CYLINDRICAL CENTRIFUGAL CHAMBER, A COAXIAL INLET PIPE DISPOSED AT ONE END OF SAID CHAMBER, ACOAXIAL OUTLET PIPE DISPOSED AT THE OTHER END OF SAID CHAMBER, A PLURALITY OF SECONDARY AIR NOZZLES DISPOSED IN A SINGLE RING ARRANGEMENT FOR DIRECTING A FLOW OF AIR TANGENTIALLY WITH RESPECT TO THE INNER SURFACE OF SAID CHAMBER AND AT AN ANGLE TOWARDS SAID INLET PIPE, THE DISTANCE BETWEEN SAID INLET PIPE AND SAID SECONDARY NOZZLES BEING ADJUSTABLE, A PARTICLE OUTLET DISPOSED CONCANTRICALLY ABOUT SAID INLET PIPE AND INCLUDING MEANS FOR ROTATING PARTICLE LADEN GAS INTRODUCED THERETHROUGH, AND MEANS FOR FORMING AN ANNULAR GAP AT THE OUTLET OF SAID INLET PIPE.

Claim 3

The apparatus recited in claim 1, wherein said inlet pipe is axially adjustable.

Claim 4

The apparatus recited in claim 1, wherein said plurality of secondary air nozzles comprise guide vanes attached to a portion of said outlet pipe which is disposed within said chamber, said guide vanes forming nozzles between said inlet pipe and the wall of said cylindrical chamber, and wherein said inlet pipe and guide vanes are axially movable with respect to said chamber.

Claim 5

The separator recited in claim 1, wherein said means for forming an annular gap comprises a symmetrical, streamlined body, axially disposed in said inlet pipe, and having a cross-sectional area which is at least one half of the cross-sectional area of said inlet pipe, for forming an annular gap about said body within said inlet pipe.

Claim 6

The separator recited in claim 4 wherein said inlet pipe is closed at its lower end with the lower end of said streamlined body resting thereon and wherein gas containing the particles to be separated is fed into the gap between said inlet pipe and said streamlined body through at least one tangential feed line which comprises said means for rotating.

Claim 7

The separator recited in claim 5, wherein said streamlined body is mounted within said inlet pipe so as to be interchangeable.

Claim 8

The separator recited in claim 6, wherein said streamlined body is interchangeable with another streamlined body having a different diameter.

Claim 9

The separator recited in claim 1, in which said means for rotating comprises a plurality of guide vanes disposed in said annular gap.

Claim 10

The separator recited in claim 1, wherein said inlet pipe is axially adjustable.

Claim 11

The separator recited in claim 1, wherein said plurality of secondary air nozzles comprises a plurality of guide vanes attached to a portion of the outlet pipe which is within the cylindrical chamber to form nozzles between said inlet pipe and the wall of said cylindrical chamber and wherein said inlet pipe and attached guide vanEs are axially movable with respect to said chamber.

Claim 12

The separator recited in claim 1, wherein a plurality of said separators are connected in series to provide a plurality of stages with an increasing distance between the particle inlet and secondary nozzle ring from stage to stage.

Claim 13

A rotary flow particle separation apparatus, comprising: a cylindrical centrifugal chamber; a coaxial inlet pipe disposed at one end of said chamber; a coaxial outlet pipe disposed at the other end of said chamber; a plurality of secondary air nozzles disposed in a single annular arrangement for directing a flow of air tangentially with respect to the inner surface of said chamber and at an angle towards said inlet pipe; a particle outlet disposed concentrically about said inlet pipe; and means for forming an annular gap at the outlet of said inlet pipe and including means for rotating particle laden gas introduced therethrough, a plurality of said separators being coupled in series so as to provide a plurality of stages in which the distance between said particle inlet and secondary nozzles increases from stage to stage.

Claim 14

A rotary flow particle separation apparatus, comprising: a cylindrical centrifugal chamber; a coaxial inlet pipe disposed at one end of said chamber; a coaxial outlet pipe disposed at the other end of said chamber; a plurality of secondary air nozzles disposed in a single annular arrangement for directing a flow of air tangentially with respect to the inner surface of said chamber and at an angle towards said inlet pipe; a particle outlet disposed concentrically about said inlet pipe; and means for forming an annular gap at the outlet of said inlet pipe and including means for rotating particle laden gas introduced therethrough, a plurality of said separators being coupled in series so as to provide a plurality of stages in which the distance between said particle inlet and secondary nozzles increases from stage to stage.