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US 5,207,805 AGranted
Cyclone separator system
AssigneeEmtrol Corporation
InventorsBodo Kalen, Nicholas L. Giuricich
Life of this patent
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AssigneeEmtrol Corporation
InventorsBodo Kalen, Nicholas L. Giuricich
Estimating the term…
An improved cyclone separator and method of construction are disclosed. Such cyclone separators are employed for separating particulates from hot gas entering the separator barrel through an axially disposed slot in its periphery. An improvement in efficiency and recovery of very small particulates is achieved by making the slot very narrow so that the particulates enter the barrel very near its inner surface, thus having less distance to travel under centrifugal force in order to reach said inner surface. In accomplishing this objective, however, it has been discovered that, for the particular inlet gas velocity selected, the structure under certain design conditions will act as a cavity resonator with the characteristic frequencies of the cavity matching the frequency of the incoming gas as it rotates in the barrel, thus causing the structure to function as a resonator thereby destroying the efficiency or, in extreme cases, having catastrophic results (in the mathematical sense). The application explains how this hazard can be avoided. The separator unit is provided with a novel converging inlet to enhance separation efficiency, and a method is provided for increasing bypass of particulate past the separator units without adversely affecting the operation thereof.
A cyclone separator of a type adapted to separate particulates from a hot particulate laden gas entering a cylindrical cyclone barrel at a predetermined velocity through a slot disposed at one end of the periphery of said barrel and extending in the axial direction thereof, wherein said barrel end is closed by a disc member which supports in concentric relation to the barrel a gas discharge tube of substantially smaller diameter than the barrel a distance substantially commensurate with the axial length of the slot and the other end portion extending axially outwardly from the barrel, the axial length of the slot being very substantially less than the axial length of the barrel and said axial length of the barrel differing from what would be the theoretical characteristic frequency length commensurate with the corresponding frequency of the gas in said barrel at the predetermined velocity by an amount sufficient to suppress the natural tendency for the separator to act as a resonator.
The apparatus of claim I in which the cyclone separator has an inlet in the form of a convergent inlet structure, the inlet has an opening which is substantially parallel to flow of said hot particulate laden gas.
A method of constructing a cyclone separator of a type adapted to separate particulates from a hot particulate laden gas entering a cylindrical cyclone barrel at a predetermined velocity through an inlet slot disposed at one end of the periphery of said barrel and extending in the axial direction thereof, which comprises closing the slotted end of such barrel with a disc member which supports in concentric relation to the barrel a gas discharge tube of substantially smaller diameter than the barrel with one end portion of said tube extending inwardly in the barrel a distance substantially commensurate with the axial length of the slot and the other end portion extending axially outwardly of the barrel, and proportioning the axial length of the slot and the barrel so that the axial length of the slot is very substantially less barrel differs from what would be the theoretical characteristic frequency length commensurate with the corresponding frequency of the gas in said barrel at the predetermined velocity by an amount sufficient to suppress the natural tendency for the separator to act as a resonator.
A cyclone separator of a type adapted to separate particulates from hot particulate laden gas entering a cylindrical cyclone barrel at a predetermined velocity thorough a slot disposed at one end of the periphery of said barrel and extending in the axial direction thereof, wherein said barrel end is closed by a disc member which supports in concentric relation to the barrel a gas discharge tube of substantial smaller diameter than the barrel a distance substantially commensurate with the axial length of the slot and the other end portion extending axially outwardly from the barrel, the axial length of the slot being very substantially less then the axial length of the barrel and a converging inlet member connected to said slot for accelerating the particulate laden gas with the separator, said slot having an aspect ratio in the order of approximately 10 to 1.
A method of enhancing the efficiency of a cyclone separator of the type receiving a particulate laden hot gas for separating particulates in a particulate outlet from clean gas which comprises disposing a inlet opening for said cyclone separator in a plane substantially parallel to flow of the particulate laden gas with provision for introducing the particulate laden gas to said cyclone separator in a direction transverse to said particulate laden gas flow, and accelerating the particulate laden gas as it proceeds in said transverse direction, whereby an increase in the quantity of particulate material passing through particulate outlet is achieved without impairing the efficiency of the cyclone separator.
Dependencies are inferred from the claim text.