[특허]Classifier

LP AMINA LLC

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Classifier

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B07B-007/08 B02C-023/12 B07B-007/02 B02C-015/00 B07B-007/086
출원번호	US-0163773 (2014-01-24)
등록번호	US-9211547 (2015-12-15)
발명자 / 주소	Latta, William Wu, Changchun Targett, Matthew
출원인 / 주소	LP AMINA LLC
대리인 / 주소	Foley & Lardner LLP
인용정보	피인용 횟수 : 1 인용 특허 : 74

초록
▼

A classifier including a housing, a body, a vane assembly, and an outlet. The housing extends along a longitudinal axis between opposing first and second ends, and includes a lower portion provided at the first end and including an inlet, an upper portion provided at the second end and including a reclaim outlet, and an intermediate portion provided between the upper and lower portions. The body is disposed within the housing that defines a chamber therebetween. The vane assembly includes a plurality of blades and is provided between an outer surface of the body and an inner surface of the intermediate portion dividing the chamber into first and second chambers. The outlet is provided at the second end and is fluidly connected to the second chamber to allow fine particles separated from coarse particles to flow through the outlet. The reclaim outlet is fluidly connected with the second chamber and a pulverizer to allow coarse particles separated from the fluid flow to be directed back to the pulverizer.

대표
청구항
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1. A classifier for separating fine and coarse particles in a fluid flow, comprising: a housing extending along a longitudinal axis between a first end and an opposing second end, the housing including: a lower portion provided at the first end and including an inlet for receiving the fluid flow;an upper portion provided at the second end and including a reclaim outlet; andan intermediate portion provided between the upper and lower portions;a body disposed within the housing that defines a chamber between the body and the housing;a vane assembly provided between an outer surface of the body and an inner surface of the intermediate portion of the housing, such that the vane assembly divides the chamber into a first chamber provided between the body and the lower portion and a second chamber provided between the body and the upper portion, wherein the vane assembly includes a plurality of blades aligned at a pitch angle relative to an entrance end of the vane assembly; andan outlet provided at the second end and fluidly connected to the second chamber to allow the fine particles separated from the coarse particles to flow through the outlet after exiting the vane assembly;wherein the reclaim outlet is fluidly connected with the second chamber and a pulverizer to allow the coarse particles separated from the fluid flow after exiting the vane assembly to be directed back to the pulverizer for regrinding;wherein the body includes opposing upper and lower frusto-conical portions; andwherein the lower fusto-conical portion is provided adjacent to the intermediate portion of the housing with the vane assembly therebetween, such that a spacing between the lower frusto-conical portion and the intermediate portion narrows from the entrance end of the vane assembly to an exit end of the vane assembly. 2. The classifier of claim 1, wherein each of the lower and upper portions of the housing are generally cylindrical in shape having a diameter, and wherein the intermediate portion has a smaller diameter relative to the diameters of the lower and upper portions. 3. The classifier of claim 1, wherein the lower portion of the housing further includes a second reclaim outlet, an outer wall, an inner wall, and an intermediate wall provided between the inner and outer walls and separating the first chamber into an inner first chamber and an outer first chamber. 4. The classifier of claim 3, wherein the inlet is provided between the outer wall and the intermediate wall and is fluidly connected to the outer first chamber, wherein the second reclaim outlet is provided between the inner wall and the intermediate wall and is fluidly connected with the pulverizer to direct coarse particles back to the pulverizer for regrinding. 5. The classifier of claim 1, wherein the reclaim outlet is provided in a bottom wall of the upper portion of the housing, and wherein the second chamber is fluidly connected to the outlet between the upper frusto-conical portion and an upper wall of the upper portion of the housing. 6. The classifier of claim 5, further comprising an outlet pipe that is fluidly connected to the outlet and a furnace configured to combust the fine particles passing from the outlet pipe to the furnace. 7. A classifier for separating fine and coarse particles in a fluid flow, comprising: a housing having a first end, a second opposing end, and an inlet opening provided at the first end to introduce the fluid flow into the classifier;an outlet pipe provided at the second end and configured to be fluidly connected to a furnace;an inner casing provided in the housing and fluidly connected to the inlet opening, such that a first chamber is provided between an outer surface of the inner casing and an inner surface of the housing;a body disposed within the housing having a streamlined lower portion that is provided within the inner casing, such that a second chamber is provided between an outer surface of the lower portion of the body and an inner surface of the inner casing; anda reclaim outlet provided at the first end and fluidly connected to the first chamber;wherein the classifier is configured such that coarse particles are directed to the first chamber and out of the reclaim outlet and the fine particles are directed out of the outlet pipe;wherein the inner casing and the lower portion of the body each include a portion having an increasing cross-sectional size when moving in a longitudinal direction from the first end toward the second end; andwherein the lower portion of the body is provided adjacent to the portion of the inner casing. 8. The classifier of claim 7, wherein the lower portion of the body and the adjacent portion of the inner casing each have a conical shape. 9. The classifier of claim 8, wherein the conical portion of the body is provided at an angle relative to the conical portion of the inner casing, such that the second chamber has a decreasing cross-sectional size when moving from an entrance of the second chamber toward an exit of the second chamber. 10. The classifier of claim 9, further comprising a vane assembly provided between the conical portion of the body and the conical portion of the inner casing, wherein the vane assembly includes a plurality of blades radially arranged around the vane assembly. 11. The classifier of claim 10, wherein each blade has an inner end coupled to the conical portion of the body and an outer end coupled to the conical portion of the inner casing, and wherein each blade has an increasing length between the inner and outer ends when moving from the entrance of the second chamber toward the exit of the second chamber. 12. The classifier of claim 11, further comprising an inlet pipe provided at the first end of the housing, wherein the inlet pipe is fluidly connected to the inlet opening of the housing and is configured to receive the fluid flow from a pulverizer. 13. The classifier of claim 12, further comprising a second vane assembly provided in the inlet pipe, wherein the second vane assembly includes a plurality of blades having a radial arrangement. 14. A method for separating fine particles and coarse particles in a fluid flow, comprising the steps of: introducing the fluid flow having fine and coarse particles into an inlet pipe provided at a first end of a housing;directing the fluid flow from the inlet pipe into an inner casing that is fluidly connected to the inlet pipe;directing the fluid flow through a vane assembly that is provided between an inner portion of the inner casing and an outer portion of a streamlined body provided within the inner casing, wherein the vane assembly includes a plurality of vanes having a pitch angle relative to an entrance end of the vane assembly to induce the fluid flow to swirl to separate the fine and coarse particles;directing the coarse particles into a chamber between the housing and the inner casing to pass through a reclaim outlet provided at the first end of housing between the housing and the inlet pipe; anddirecting the fine particles into an outlet pipe provided at a second end of the housing that is opposite the first end;wherein the inner casing includes a portion having an increasing cross-sectional size and the body includes a portion having an increasing cross-sectional size when moving in a longitudinal direction from the first end toward the second end; andwherein the portions of the inner casing and the body are provided adjacent to one another between the vane assembly and the inlet pipe defining a second chamber. 15. The method of claim 14, wherein the portion of the inner casing has a conical shape and the portion of the body has a conical shape, and wherein the conical portion of the inner casing is provided at an angle relative to the conical portion of the body, such that the second chamber narrows in a converging manner moving from the inlet pipe toward the vane assembly. 16. The method of claim 15, wherein the converging manner of the second chamber has a generally V-shaped cross-section, which in combination with the vane assembly induce a swirl and direct the coarse particles in the fluid flow outward to a dead zone in a portion of the first chamber that is outside the vane assembly and the inner casing. 17. The method of claim 16, wherein the reclaim outlet is fluidly connected with a pulverizer, such that the coarse particles are directed from the reclaim outlet to the pulverizer for regrinding. 18. The method of claim 17, wherein the fine particles are directed from the outlet pipe into a furnace to combust the fine particles.

이 특허에 인용된 특허 (74)

이 특허를 인용한 특허 피인용횟수: 1

She, Ying; Nardi, Aaron T.; Klecka, Michael A.. Powder classification system and method. USP2018029889450.

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Classifier

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이 특허에 인용된 특허 (74)

이 특허를 인용한 특허 피인용횟수: 1

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