US 4,994,097 A · Rotational particle separator

Abstract

A rotational separator for separating particulate material from gas includes a housing having a gas inlet, a gas outlet, and an outlet for separated particulate material; a centrifuge mounted for rotation in the housing and including separation channels which extend parallel to a common rotation axis; and a driver for rotating the centrifuge; wherein the particulate material separated has a cross-sectional dimension from about 0.1 to about 5 um, that the separation channels are provided with singly-connected cross-sections over a substantial part of the axial separation channel length, and that the hydraulic diameter of the separation channels and the average axial gas velocity are selected in mutual dependence such that the Reynolds number is less than 2400 and the gas passes through the separation channels in a laminar flow.

Claims16

Dependent claims

A rotational particle separator for separating particulate material having cross-sectional dimensions from about 0.1 micron to about 5 microns from a gas, said separator comprising:

a housing having a gas inlet, a gas outlet and an outlet for separated particulate material;
a centrifuge rotatably mounted in said housing along a rotation axis extending through said housing, said centrifuge including a plurality of radially-spaced individual separation channels which extend parallel to each other and parallel to said rotation axis, each of said separation channels having a cross-section along substantially the entire length thereof which extends azimuthally about said rotation axis by less than 360.degree. to prevent azimuthal flows greater than 360.degree. about said rotation axis in any of said individual separation channels;
and
means for rotating said centrifuge within said housing about said rotation axis.

1 more element

A rotational particle separator for separating particulate material having cross-sectional dimensions from about 0.1 micron to about 5 microns from a gas, said separator comprising:

a housing having a gas inlet, a gas outlet and an outlet for separated particulate material;
a centrifuge rotatably mounted in said housing along a rotation axis extending through said housing, said centrifuge including a plurality of radially-spaced individual separation channels which extend parallel to each other and parallel to said rotation axis, each of said separation channels extending azimuthally about said rotation axis by less than 360.degree. to prevent azimuthal flows greater than 360.degree. about said rotation axis in any of said individual separation channels, and each of said separation channels having boundary walls along substantially the entire length thereof bounding the separation in radial and azimuthal directions relative to the rotation axis;
and
means for rotating said centrifuge within said housing about said rotation axis.

1 more element

A rotational particle separator for separating particulate material having cross-sectional dimensions from about 0.1 micron to about 5 microns from a gas, said separator comprising:

a housing having a gas inlet, a gas outlet and an outlet for separated particulate material;
a centrifuge rotatably mounted in said housing along a rotation axis extending through said housing, said centrifuge including a plurality of radially-spaced individual separation channels which extend parallel to each other and parallel to said rotation axis, each of said separation channels extending azimuthally about said rotation axis by less than 360.degree. to prevent azimuthal flows greater than 360.degree. about said rotation axis in any of said individual separation channels, and each of said separation channels enclosed along substantially the entire length thereof by a single wall;
and
means for rotating said centrifuge within said housing about said rotation axis.

1 more element

Dependencies are inferred from the claim text.

Rotational particle separator

Life of this patent

Rotational particle separator

Life of this patent

Abstract

Claims16