CA2407230A1 - Switching valve and a regenerative thermal oxidizer including the switching valve - Google Patents

Switching valve and a regenerative thermal oxidizer including the switching valve Download PDF

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Publication number
CA2407230A1
CA2407230A1 CA002407230A CA2407230A CA2407230A1 CA 2407230 A1 CA2407230 A1 CA 2407230A1 CA 002407230 A CA002407230 A CA 002407230A CA 2407230 A CA2407230 A CA 2407230A CA 2407230 A1 CA2407230 A1 CA 2407230A1
Authority
CA
Canada
Prior art keywords
valve
flow distributor
valve port
heat exchange
ring seal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002407230A
Other languages
French (fr)
Other versions
CA2407230C (en
Inventor
James T. Cash
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Duerr Systems Inc
Original Assignee
Megtec Systems, Inc.
James T. Cash
Babcock & Wilcox Megtec, Llc
Durr Megtec, Llc
Durr Systems, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Megtec Systems, Inc., James T. Cash, Babcock & Wilcox Megtec, Llc, Durr Megtec, Llc, Durr Systems, Inc. filed Critical Megtec Systems, Inc.
Publication of CA2407230A1 publication Critical patent/CA2407230A1/en
Application granted granted Critical
Publication of CA2407230C publication Critical patent/CA2407230C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
    • F23G7/061—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating
    • F23G7/065—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating using gaseous or liquid fuel
    • F23G7/066—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating using gaseous or liquid fuel preheating the waste gas by the heat of the combustion, e.g. recuperation type incinerator
    • F23G7/068—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating using gaseous or liquid fuel preheating the waste gas by the heat of the combustion, e.g. recuperation type incinerator using regenerative heat recovery means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
    • F27D7/02—Supplying steam, vapour, gases, or liquids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2202/00—Combustion
    • F23G2202/60—Combustion in a catalytic combustion chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/004—Systems for reclaiming waste heat
    • F27D2017/007—Systems for reclaiming waste heat including regenerators
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/5544—Reversing valves - regenerative furnace type
    • Y10T137/5689—Rotary reversing valve

Abstract

Switching valve and a regenerative thermal oxidizer (10) including the switching valve (20). The valve of the present invention exhibits excellent sealing characteristics and minimizes wear. The valve (20) has a seal plate (100) that defines two chambers (25), each chamber being a flow port that leads to one of two regenerative beds of the oxidizer (10). The valve also includes a switching flow distributor (50) which provides alternate channeling of the inlet or outlet process gas to each half of the seal plate (100). The valve operates between two modes: a stationary mode and a valve movement mode. In the stationary mode, a tight gas seal is used to minimize or prevent process gas leakage. The gas seal also seals during valve movement.

Claims (22)

1. A valve, comprising:
a first valve port and a second valve port separate from said first valve port;
a flow distributor having an inlet passageway and an outlet passageway, said flow distributor being movable with respect to said first and second valve ports between a first position in which said first valve port is in fluid communication with said inlet passageway and said second valve port is in fluid communication with said outlet passageway, and a second position in which said first valve port is in fluid communication with said outlet passageway and said second valve port is in fluid communication with said inlet passageway; said flow distributor comprising a blocking surface which blocks flow through a first portion of said first valve port and through a second portion of said second valve port when said flow distributor is between said first and second positions.
2. The valve of claim 1, wherein said first and second valve ports are each divided into at least two chambers.
3. The valve of claim 1, wherein said first and second valve ports are each divided into at least three chambers.
4. The valve of claim 1, wherein said flow distributor is rotatable 180° between said first and second positions.
5. The valve of claim 1, wherein said first and second portions of said valve ports are congruent.
6. The valve of claim 1, further comprising a drive shaft coupled to said flow distributor; at least one radial duct in fluid communication with and extending radially from said drive shaft; and a rotating port comprising: an outer ring seal, an inner ring seal spaced from said outer ring seal and having a plurality of bores, and at leat one piston ring, said at least one piston ring being positioned in a respective one of said plurality of bores in said inner ring seal and biasing against said outer ring seal.
7. The valve of claim 6, further comprising means for causing gas to flow through said drive shaft, through said at least one radial duct, and between said at least one piston ring and said inner ring seal.
8. The valve of claim 6, wherein there are a plurality of piston rings, and further comprising means for causing gas to flow through said drive shaft, through said at least one radial duct, and between said plurality of piston rings.
9. The valve of claim 1, further comprising a sealing plate, and wherein said flow distributor further comprises a mating surface having a plurality of apertures through which gas flows, creating a cushion of gas between said mating surface and said sealing plate.
10. The valve of claim 9, wherein said sealing plate comprises at least one annular groove aligned with at least one of said plurality of apertures.
11. The valve of claim 1, further comprising drive means for moving said flow distributor between said first and second positions.
12. The valve of claim 11, wherein said drive means comprises a gear coupled to said flow distributor, said gear having a plurality of spurs, and at least one rack having a plurality of grooves into which said plurality of spurs fit, whereby movement of said rack causes a corresponding movement of said gear, which rotates said flow distributor.
13. A regenerative thermal oxidizer for processing a gas, comprising:
a combustion zone;
a first heat exchange bed containing heat exchange media and in communication with said combustion zone;
a second heat exchange bed containing heat exchange media and in communication with said combustion zone;
a valve for alternating the flow of said gas between said first and second heat exchange beds, said valve comprising:
a first valve port in fluid communication with said first heat exchange bed and a second valve port separate from said first valve port and in fluid communication with said second heat exchange bed;
a flow distributor having an inlet passageway and an outlet passageway, said flow distributor being movable with respect to said first and second valve ports between a first position in which gas entering said inlet passageway flows into said first heat exchange column through said first valve port and out of said outlet passageway through said second heat exchange column and said second valve port, and a second position in which gas entering said first passageway flows into said second heat exchange column through said second valve port and out said outlet passageway through said first heat exchange column and said first valve port; said flow distributor comprising a blocking portion for blocking the flow of gas through a portion of said first and second valve ports when said flow distributor is between said first and second positions.
14. The regenerative thermal oxidizer of claim 13, further comprising a cold face plenum comprising at least one baffle for dividing said first and second valve ports into a plurality of chambers.
15. The regenerative thermal oxidizer of claim 14, wherein each of said chambers is congruent.
16. The regenerative thermal oxidizer of claim 13, wherein said flow distributor is housed in a manifold having a manifold inlet and a manifold outlet, and wherein said manifold inlet is in fluid communication with said first passageway of said flow distributor, and said manifold outlet is in fluid communication with said second passageway of said flow distributor.
17. The regenerative thermal oxidizer of claim 13, further comprising a drive shaft coupled to said flow distributor; at least one radial duct in fluid communication with and extending radially from said drive shaft; and a rotating port comprising: an outer ring seal, an inner ring seal spaced from said outer ring seal and having a plurality of bores, and at least one piston ring, said at least one piston ring positioned in a respective one of said plurality of bores in said inner ring seal and biasing against said outer ring seal.
18. The regenerative thermal oxidizer of claim 17, further comprising means for causing gas to flow into said drive shaft, into said at least one radial duct, and between said at least one piston ring and said inner ring seal.
19. The regenerative thermal oxidizer of claim 13, further comprising a sealing plate, and wherein said flow distributor further comprises a mating surface having a plurality of apertures through which gas flows, creating a cushion of gas between said mating surface and said sealing plate.
20. The regenerative thermal oxidizer of claim 19, wherein said sealing plate comprises at least one annular groove aligned with some of said plurality of apertures.
21. The regenerative oxidizer of claim 13, further comprising drive means for moving said flow distributor between said first and second positions.
22. The regenerative oxidizer of claim 21, wherein said drive means comprises a gear coupled to said flow distributor, said gear having a plurality of spurs, and at least one rack having a plurality of grooves into which said plurality of spurs fit, whereby movement of said rack causes a corresponding movement of said gear, which rotates said flow distributor.
CA2407230A 2000-05-17 2001-04-16 Switching valve and a regenerative thermal oxidizer including the switching valve Expired - Lifetime CA2407230C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/572,129 US6261092B1 (en) 2000-05-17 2000-05-17 Switching valve
US09/572,129 2000-05-17
PCT/US2001/012480 WO2001088453A1 (en) 2000-05-17 2001-04-16 Switching valve and a regenerative thermal oxidizer including the switching valve

Publications (2)

Publication Number Publication Date
CA2407230A1 true CA2407230A1 (en) 2001-11-22
CA2407230C CA2407230C (en) 2010-02-09

Family

ID=24286461

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2407230A Expired - Lifetime CA2407230C (en) 2000-05-17 2001-04-16 Switching valve and a regenerative thermal oxidizer including the switching valve

Country Status (17)

Country Link
US (2) US6261092B1 (en)
EP (1) EP1290392B1 (en)
JP (1) JP5058423B2 (en)
KR (1) KR100590304B1 (en)
CN (2) CN101210680B (en)
AT (1) ATE343774T1 (en)
AU (2) AU5165201A (en)
CA (1) CA2407230C (en)
CZ (1) CZ20023798A3 (en)
DE (1) DE60124097T2 (en)
ES (1) ES2273825T3 (en)
MX (1) MXPA02010881A (en)
NO (1) NO328903B1 (en)
PL (1) PL199188B1 (en)
PT (1) PT1290392E (en)
RU (1) RU2253812C2 (en)
WO (1) WO2001088453A1 (en)

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Also Published As

Publication number Publication date
AU2001251652B2 (en) 2004-10-21
WO2001088453A1 (en) 2001-11-22
JP5058423B2 (en) 2012-10-24
ATE343774T1 (en) 2006-11-15
MXPA02010881A (en) 2003-03-27
DE60124097D1 (en) 2006-12-07
PT1290392E (en) 2007-01-31
US6892750B2 (en) 2005-05-17
CN101210680A (en) 2008-07-02
NO328903B1 (en) 2010-06-14
US20010044090A1 (en) 2001-11-22
RU2253812C2 (en) 2005-06-10
PL199188B1 (en) 2008-08-29
KR20030022800A (en) 2003-03-17
CN101210680B (en) 2011-11-09
EP1290392A1 (en) 2003-03-12
NO20025485D0 (en) 2002-11-15
KR100590304B1 (en) 2006-06-15
CA2407230C (en) 2010-02-09
JP2003533666A (en) 2003-11-11
DE60124097T2 (en) 2007-05-03
PL365194A1 (en) 2004-12-27
CN1443296A (en) 2003-09-17
EP1290392B1 (en) 2006-10-25
US6261092B1 (en) 2001-07-17
AU5165201A (en) 2001-11-26
CN100402928C (en) 2008-07-16
NO20025485L (en) 2003-01-14
EP1290392A4 (en) 2004-06-30
ES2273825T3 (en) 2007-05-16
CZ20023798A3 (en) 2003-03-12

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