IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0040898
(2005-01-21)
|
등록번호 |
US-7316733
(2008-01-08)
|
발명자
/ 주소 |
- Hedrick,Brian W.
- Johnson, II,Richard A.
- Sechrist,Paul A.
- Iddir,Hadjira
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
4 인용 특허 :
8 |
초록
▼
A third stage separator vessel includes a diffuser to promote uniform flow among an array of separation cyclones in the vessel. The vessel has an inlet to receive a gas stream containing solid particles, and the diffuser is mounted at the inlet so that at least some of the stream passes through the
A third stage separator vessel includes a diffuser to promote uniform flow among an array of separation cyclones in the vessel. The vessel has an inlet to receive a gas stream containing solid particles, and the diffuser is mounted at the inlet so that at least some of the stream passes through the diffuser. In an embodiment, a gap between the diffuser and the inlet causes some of the gas stream to flow over an outer surface of the diffuser. The diffuser preferably includes a perforated plate mounted across a wide end of a frustoconical portion. The plate has a plurality of openings through which the flow passes. The openings in the plate have various sizes and positions to direct a greater amount of flow through radially outward portions of the plate than from a central portion of the plate.
대표청구항
▼
What is claimed is: 1. A vessel for separating particulate solids from a contaminated gas stream, the vessel comprising: a wall defining a generally cylindrical interior, the wall including an inlet at a top of the vessel through which a stream of contaminated gas enters the interior; a plurality o
What is claimed is: 1. A vessel for separating particulate solids from a contaminated gas stream, the vessel comprising: a wall defining a generally cylindrical interior, the wall including an inlet at a top of the vessel through which a stream of contaminated gas enters the interior; a plurality of separation cyclones mounted in a fixed manner relative to the wall within the interior, the cyclones arranged in an array vertically below the inlet; a diffuser mounted to the vessel wall within the interior so that at least a portion of the contaminated gas passes through the diffuser, the diffuser including: an annular body defining a passage having a narrow inlet end and a wider outlet end; and a perforated plate mounted across the passage of the diffuser, the perforated plate having a plurality of openings. 2. The vessel of claim 1, wherein the inlet is in communication with a catalyst regeneration vessel. 3. The vessel of claim 2, wherein at least a portion of the body of the diffuser has a frustoconical shape and the perforated plate is mounted across an opening of the frustoconical portion. 4. The vessel of claim 1, wherein the openings in the perforated plate are configured to provide varying amounts of open area per cross-sectional area at multiple portions of the plate. 5. The vessel of claim 4, wherein some of the openings in the perforated plate have a greater area than in others. 6. The vessel of claim 4, wherein more openings are provided in some portions of the plate than others. 7. The vessel of claim 4, wherein the openings in the perforated plate provide less open area in a central portion of the plate than at a radially outward portion. 8. The vessel of claim 1, wherein the openings occupy about 35 to 55% of an area of the plate. 9. The vessel of claim 1, wherein the openings occupy about 45 to 50% of an area of the plate. 10. The vessel of claim 3, wherein the frustoconical section tapers at an angle of about 20 degrees relative to vertical. 11. The vessel of claim 1, wherein the diffuser is mounted in a manner such that it is spaced from the wall of the vessel so that a portion of the stream of contaminated gas from the inlet flows over an exterior surface of the diffuser. 12. The vessel of claim 11, wherein the diffuser further includes a cylindrical portion that is open toward the inlet, a frustoconical portion extending downwardly outwardly from the cylindrical portion in a tapered manner, the cylindrical portion being positioned at least partially within the inlet and separated therefrom by an annular gap. 13. A system comprising: a catalyst regeneration vessel including at least one cyclone to remove at least some solid particles from a contaminated gas stream; a third stage separator vessel for further removing particulate solids from the contaminated gas stream, the vessel comprising: a wall defining an interior, the wall including an inlet receiving the contaminated gas from the catalyst regeneration vessel; a plurality of separation cyclones mounted within the interior in an array a distance from the inlet; and a diffuser including an annular body, defining a passage, the diffuser mounted to the vessel wall within the interior so that a portion of the contaminated gas passes through the passage and a portion of the contaminated gas passes over an exterior surface of the annular body, the annular body tapering outwardly as it extends away from the inlet. 14. The system of claim 13, wherein the diffuser further includes a perforated plate mounted across the passage through the annular body that defines a frustoconical portion, the perforated plate having a plurality of openings. 15. The system of claim 13, wherein the openings in the perforated plate are configured to provide varying amounts of open area per cross-sectional area at different portions of the plate. 16. The system of claim 13, wherein the diffuser further-includes a cylindrical portion that extends upwardly from a narrow inlet end of a frustoconical portion, the cylindrical portion being positioned at least partially within the inlet and separated therefrom by an annular gap through which a portion of the contaminated gas is directed over an exterior of the diffuser. 17. A process for separating particulate solids from a contaminated gas stream, the process comprising the steps of: delivering said contaminated gas stream through an inlet pipe to a separator vessel having a wall that defines an interior; providing a diffuser mounted to the wall near the inlet, the diffuser defining a passage increasing in cross-sectional area as it extends away from the inlet, and a perforated plate mounted to extend across a wide end of the passage, the perforated plate having a plurality of openings; passing at least some of the contaminated gas stream through the diffuser to exit the diffuser through the openings in the perforated plate; diffusing the flow from the diffuser among a plurality of separation cyclones mounted in an array within the interior a distance below the diffuser; and separating particulate solids from said contaminated gas stream in said cyclones. 18. The process of claim 17, further comprising passing some of the contaminated gas around an exterior of the diffuser. 19. The process of claim 18, wherein the diffuser further includes a cylindrical portion that extends vertically upward from a narrow inlet end of a frustoconical portion, an exterior diameter of the cylindrical portion being smaller than an inner diameter of the inlet to define an annular gap. 20. The process of claim 17, further comprising, before said delivering step, withdrawing said contaminated gas from a catalyst regeneration vessel.
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