US3610538A - Diffuser for feed water heater - Google Patents

Diffuser for feed water heater Download PDF

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Publication number
US3610538A
US3610538A US847645A US3610538DA US3610538A US 3610538 A US3610538 A US 3610538A US 847645 A US847645 A US 847645A US 3610538D A US3610538D A US 3610538DA US 3610538 A US3610538 A US 3610538A
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United States
Prior art keywords
neck
diffuser
inlet
perforated
feed water
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Expired - Lifetime
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US847645A
Inventor
Joseph T Enders
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Struthers Wells Corp
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Struthers Wells Corp
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
    • F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
    • F22D1/32—Feed-water heaters, i.e. economisers or like preheaters arranged to be heated by steam, e.g. bled from turbines
    • 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
    • Y10T137/8593—Systems
    • Y10T137/86348—Tank with internally extending flow guide, pipe or conduit
    • Y10T137/86372—Inlet internally extending

Definitions

  • a diffuser for a feed water heater is made from capped coaxial lengths of perforated pipe of a larger and a smaller diameter disposed one within the other and fixed to protrude from the water inlet.
  • a rectangular baffle being fixed between the walls of the perforated pipes near the water inlet to direct entering flow to adjacent feed water tubes.
  • tubes of the feed water heater are subjected to high fluid impingement velocities which are thought to be the main factor causing steel wastage in the form of corrosion or arosion near the entrances of the tubes in the inlet chamber.
  • Conventional practice has the water inlet of a feed water heater enter the inlet chamber at right angles to the flow into the tubes fixed in the inlet chamber tube sheet.
  • This invention provides a diffuser to be mounted on the inlet neck of a feed water heater to reduce impingement velocities and minimize eddies in the entrance chamber by distributing entering fiow to the tubes.
  • the inexpensive diffuser of this invention consists of capped coaxial lengths of perforated pipe of larger and smaller diameter disposed one within the other and fixed to protrude from the water inlet.
  • a rectangular baffle with a boxlike configuration is fixed between the walls of the perforated pipes near the water inlet and directs flow to the nearest adjacent tubes which would otherwise be relatively water starved.
  • FIG. 1 is a section through a fragment of an inlet chamber and a difi'user mounted therein;
  • FIG. 2 is a view taken on line 2-2 of FIG. 1 with a portion of the outer perforated pipe of the diffuser broken away.
  • a conventional feed water heater has an inlet chamber with an inlet tube sheet 11 into which tubes 12 are fixed.
  • An inlet neck 13 extends into inlet chamber 10 to conduct water therein.
  • the diffuser of this invention has a base 15 fixed or screwed into neck 13.
  • Base 15 has a washerlike disk 16 welded thereon.
  • a central perforated pipe 17 is welded to extend outward from the central opening of disk 16 and a larger diameter perforated pipe 18 is welded to extend outward from the periphery of disk 16.
  • the perforations 19 of pipe 17 and the perforations 20 of pipe 18 may be of any desired size and spacing to accommodate a required flow therethrough.
  • the pipes 17 and 18 may be formed by rolling them from perforated sheet stock.
  • a cap or closure 22 is welded over the ends of pipes 17 and 18.
  • a rectangular baffle or box 24 has the sides 25 and 26 and the end wall 27 which extend between the inner and outer perforated pipes 17 and 18. Washer 16 forms one end wall of box 24.
  • the perforated pipes 17 and 18 fonn its top and bottom and the perforations l9 and 20 allow flow through the box 24 which serves to direct flow to the tube or tubes 12 nearest inlet neck 13.
  • a diffuser for feed water heater having an inlet chamber, a tube sheet in said inlet chamber, and a water inlet at substantially right angles to said tube sheet, said difiuser comprising, in combination, an inlet neck, a first perforated pipe extending from said inlet neck, a second larger diameter perforated pipe disposed about said first perforated pipe with an annular space therebetween, a washer shaped closure extending between the ends of said perforated pipes disposed towards said neck, a cap fixed over the ends of said perforated pipes disposed away from said neck, and a rectangular baffle having an end wall formed by said washer shaped closure enclosing a portion of the space between said perforated pipes adjacent to said neck and facing toward said tube sheet.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

A diffuser for a feed water heater is made from capped coaxial lengths of perforated pipe of a larger and a smaller diameter disposed one within the other and fixed to protrude from the water inlet, a rectangular baffle being fixed between the walls of the perforated pipes near the water inlet to direct entering flow to adjacent feed water tubes.

Description

United States. Patent Inventor Joseph T. Enders Berkeley, 11]. App1.No.- 847,645 Filed Aug. 5, 1969 Patented Oct. 5, 1971 Assignee Struthers Wells Corporation Priority Aug. 7, 1968 Great Britain 37697/68 DIFFUSER FOR FEED WATER HEATER 1 Claim, 2 Drawing Figs.
Int. Cl 1105b l/l4 Field of Search 239/542,
[56] References Cited UNITED STATES PATENTS 2,213,955 9/1940 Freitas 239/542 2,760,819 8/1956 Thomas... 239/542 X 2,909,328 10/1959 Babyak.... 239/542 X 3,244,197 4/1966 Stilwell 137/592 3,342,193 9/1967 Deering et al. 239/5535 X FOREIGN PATENTS 876,891 9/1954 Germany 137/592 Primary Examiner-M. Henson Wood, Jr. Assistant Examiner-Michael Y. Mar Attorney-William A. Drucker ABSTRACT: A diffuser for a feed water heater is made from capped coaxial lengths of perforated pipe of a larger and a smaller diameter disposed one within the other and fixed to protrude from the water inlet. a rectangular baffle being fixed between the walls of the perforated pipes near the water inlet to direct entering flow to adjacent feed water tubes.
DIFFUSER FOR FEED WATER HEATER BACKGROUND OF THE INVENTION In a high-pressure utility thermal power system, tubes of the feed water heater are subjected to high fluid impingement velocities which are thought to be the main factor causing steel wastage in the form of corrosion or arosion near the entrances of the tubes in the inlet chamber. Conventional practice has the water inlet of a feed water heater enter the inlet chamber at right angles to the flow into the tubes fixed in the inlet chamber tube sheet.
SUMMARY OF THE INVENTION This invention provides a diffuser to be mounted on the inlet neck of a feed water heater to reduce impingement velocities and minimize eddies in the entrance chamber by distributing entering fiow to the tubes. The inexpensive diffuser of this invention consists of capped coaxial lengths of perforated pipe of larger and smaller diameter disposed one within the other and fixed to protrude from the water inlet. A rectangular baffle with a boxlike configuration is fixed between the walls of the perforated pipes near the water inlet and directs flow to the nearest adjacent tubes which would otherwise be relatively water starved.
BRIEF DESCRIPTION OF THE DRAWING FIG. 1 is a section through a fragment of an inlet chamber and a difi'user mounted therein; and
FIG. 2 is a view taken on line 2-2 of FIG. 1 with a portion of the outer perforated pipe of the diffuser broken away.
DESCRIPTION OF THE PREFERRED EMBODIMENT A conventional feed water heater has an inlet chamber with an inlet tube sheet 11 into which tubes 12 are fixed. An inlet neck 13 extends into inlet chamber 10 to conduct water therein.
The diffuser of this invention has a base 15 fixed or screwed into neck 13. Base 15 has a washerlike disk 16 welded thereon. A central perforated pipe 17 is welded to extend outward from the central opening of disk 16 and a larger diameter perforated pipe 18 is welded to extend outward from the periphery of disk 16. The perforations 19 of pipe 17 and the perforations 20 of pipe 18 may be of any desired size and spacing to accommodate a required flow therethrough. The pipes 17 and 18 may be formed by rolling them from perforated sheet stock. A cap or closure 22 is welded over the ends of pipes 17 and 18.
A rectangular baffle or box 24 has the sides 25 and 26 and the end wall 27 which extend between the inner and outer perforated pipes 17 and 18. Washer 16 forms one end wall of box 24. The perforated pipes 17 and 18 fonn its top and bottom and the perforations l9 and 20 allow flow through the box 24 which serves to direct flow to the tube or tubes 12 nearest inlet neck 13.
While this invention has been shown and described in the best form known, it will nevertheless be understood that this is purely exemplary.
What is claimed is:
l. A diffuser for feed water heater having an inlet chamber, a tube sheet in said inlet chamber, and a water inlet at substantially right angles to said tube sheet, said difiuser comprising, in combination, an inlet neck, a first perforated pipe extending from said inlet neck, a second larger diameter perforated pipe disposed about said first perforated pipe with an annular space therebetween, a washer shaped closure extending between the ends of said perforated pipes disposed towards said neck, a cap fixed over the ends of said perforated pipes disposed away from said neck, and a rectangular baffle having an end wall formed by said washer shaped closure enclosing a portion of the space between said perforated pipes adjacent to said neck and facing toward said tube sheet.

Claims (1)

1. A diffuser for feed water heater having an inlet chamber, a tube sheet in said inlet chamber, and a water inlet at substantially right angles to said tube sheet, said diffuser comprising, in combination, an inlet neck, a first perforated pipe extending from said inlet neck, a second larger diameter perforated pipe disposed about said first perforated pipe with an annular space therebetween, a washer shaped closure extending between the ends of said perforated pipes disposed towards said neck, a cap fixed over the ends of said perforated pipes disposed away from said neck, and a rectangular baffle having an end wall formed by said washer shaped closure enclosing a portion of the space between said perforated pipes adjacent to said neck and facing toward said tube sheet.
US847645A 1968-08-07 1969-08-05 Diffuser for feed water heater Expired - Lifetime US3610538A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB37697/68A GB1215187A (en) 1968-08-07 1968-08-07 Diffuser for feed water heater

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US3610538A true US3610538A (en) 1971-10-05

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GB (1) GB1215187A (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1982000700A1 (en) * 1980-08-19 1982-03-04 Techn Corp Nps Pipe rupture restraint and jet shield diffuser assembly
US4438883A (en) * 1982-08-23 1984-03-27 Getty Synthetic Fuels, Inc. Dynamic pressure attenuator and method
EP0214367A1 (en) * 1985-05-03 1987-03-18 Deutsche Vortex GmbH Aeration device
US4736713A (en) * 1984-11-15 1988-04-12 Westinghouse Electric Corp. Foraminous or perforated flow distribution plate
US5592969A (en) * 1995-03-10 1997-01-14 Reichert; Russell L. Turbulence arrester
US5806586A (en) * 1993-07-03 1998-09-15 Ernst Flitsch Gmbh & Co. Plate heat exchanger with a refrigerant distributor
US6835307B2 (en) 2000-08-04 2004-12-28 Battelle Memorial Institute Thermal water treatment
US20100200069A1 (en) * 2007-06-28 2010-08-12 Karsten Glomset Water inlet arrangement
CN102032551A (en) * 2010-11-12 2011-04-27 杭州锅炉集团股份有限公司 Steam-water anti-scour device for nuclear power heater
US20110139422A1 (en) * 2009-12-15 2011-06-16 Delphi Technologies, Inc. Fluid distribution device
US20140284035A1 (en) * 2013-03-25 2014-09-25 Lg Electronics Inc. Heat exchanger
US20220088514A1 (en) * 2019-01-11 2022-03-24 Technology Trading, Llc. Double pipe for uniformly distributing flow

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2581162B1 (en) * 1985-04-24 1988-09-09 Electricite De France STEAM GENERATOR FOOD WATER HEATER

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1982000700A1 (en) * 1980-08-19 1982-03-04 Techn Corp Nps Pipe rupture restraint and jet shield diffuser assembly
US4364417A (en) * 1980-08-19 1982-12-21 Nps Technologies, Inc. Pipe rupture restraint and jet shield diffuser assembly
US4438883A (en) * 1982-08-23 1984-03-27 Getty Synthetic Fuels, Inc. Dynamic pressure attenuator and method
US4736713A (en) * 1984-11-15 1988-04-12 Westinghouse Electric Corp. Foraminous or perforated flow distribution plate
EP0214367A1 (en) * 1985-05-03 1987-03-18 Deutsche Vortex GmbH Aeration device
US5806586A (en) * 1993-07-03 1998-09-15 Ernst Flitsch Gmbh & Co. Plate heat exchanger with a refrigerant distributor
US5592969A (en) * 1995-03-10 1997-01-14 Reichert; Russell L. Turbulence arrester
US6835307B2 (en) 2000-08-04 2004-12-28 Battelle Memorial Institute Thermal water treatment
US20100200069A1 (en) * 2007-06-28 2010-08-12 Karsten Glomset Water inlet arrangement
US8707988B2 (en) * 2007-06-28 2014-04-29 Linde Aktiengesellschaft Water inlet arrangement
US9717219B2 (en) 2007-06-28 2017-08-01 Linde Aktiengesellschaft Water inlet arrangement
US20110139422A1 (en) * 2009-12-15 2011-06-16 Delphi Technologies, Inc. Fluid distribution device
CN102032551A (en) * 2010-11-12 2011-04-27 杭州锅炉集团股份有限公司 Steam-water anti-scour device for nuclear power heater
US20140284035A1 (en) * 2013-03-25 2014-09-25 Lg Electronics Inc. Heat exchanger
US20220088514A1 (en) * 2019-01-11 2022-03-24 Technology Trading, Llc. Double pipe for uniformly distributing flow
US11986755B2 (en) * 2019-01-11 2024-05-21 Technology Trading, Llc. Double pipe for uniformly distributing flow

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Publication number Publication date
GB1215187A (en) 1970-12-09

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