US3805496A - Formed vane elements for liquid-vapor separators - Google Patents

Formed vane elements for liquid-vapor separators Download PDF

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Publication number
US3805496A
US3805496A US00007694A US769470A US3805496A US 3805496 A US3805496 A US 3805496A US 00007694 A US00007694 A US 00007694A US 769470 A US769470 A US 769470A US 3805496 A US3805496 A US 3805496A
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United States
Prior art keywords
vanes
vane
section
improvement
spacers
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.)
Expired - Lifetime
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US00007694A
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English (en)
Inventor
P Sokolowski
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CBS Corp
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Westinghouse Electric Corp
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Publication date
Application filed by Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Priority to US00007694A priority Critical patent/US3805496A/en
Priority to DE2104355A priority patent/DE2104355C3/de
Priority to CA104,091A priority patent/CA953659A/en
Application granted granted Critical
Publication of US3805496A publication Critical patent/US3805496A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/26—Steam-separating arrangements
    • F22B37/28—Steam-separating arrangements involving reversal of direction of flow
    • F22B37/286—Steam-separating arrangements involving reversal of direction of flow specially adapted for steam generators of nuclear power plants

Definitions

  • ABSTRACT Apparatus for separating entrained liquids from a traveling stream of gas or vapor wherein the gas travels through sinuous paths formed by generally vertical va ne s of gig-zag cross-sectional configuration arranged in side-by-side relationship and provided with vertically extending channels which collect water droplets impinged upon the surfaces of the vanes as the gas travels therethrough.
  • the invention is characterized in that each vane, including the collecting channel therefor, is fabricated from a single sheet of metal formed as by stamping, bending or roll forming into the desired cross-sectional configuration. This reduces the cost of the product and eliminates tolerance problems encountered when an attempt is made to obtain the desired cross-sectional configuration by welding.
  • the vane-type separator consists essentiallyof a housing having an inlet and outlet section for the gas and a plurality of vertically extending vanes arranged in side-by-side relationship which define, in crosssection, a zig-zag configuration.
  • the gas must pass through sinuous passages formed by the spaced vanes in traveling from theinlet to the outlet. In so doing, it is subjected to multiple changes in direction as it travels through the sinuous paths. This causes a turbulent condition of the gas which impinges against the sides of the vanes, causing any entrained droplets of liquid to adhere to the surfaces of the vanes.
  • a turbulent condition of the gas which impinges against the sides of the vanes, causing any entrained droplets of liquid to adhere to the surfaces of the vanes.
  • At the trailing edge of each flat surface of a vane forming a, zig-zag configuration is a vertical channel which collects the liquid droplets and directs them downwardly into a collecting basin from where the water, in the case of a steam turbine, is returned to the boiler.
  • thevanes used in a separator of this type have been fabricated from formed sections of generally zig-zag configuration having strips spot-welded thereto to form the aforesaid collecting channels. Because of I the difficulties encountered in positioning and holding the strips during spot-welding, the resulting pockets which serve as water catchers are not uniform in size. Large pocket gap variations will result in differences in moisture carry-over performance, meaning that in the caseof turbine applications one steam generator'rnay not perform as well. as another because of differences in pocket dimensions. Pocket gap variation may also result in steam generator performance being different from tests conducted in the laboratory. Furthermore, extensive positioning equipment for holding the strips during spot-welding together with a large amount of labor make prior art vanes formed from a plurality of parts inherently expensive.
  • the invention eliminates the difficulties encountered in attempting to weld channels to a vane for a separator by forming the entire vane, including the which, at its end opposite the channel, is connected by a bend to the next portion of the vane which has a channel formed therein in the same manner. All channels'face in the same direction and are located at the trailing ends of the flat surfaces of the vanes (i.e., the trailing ends as viewed from the direction of gas flow through the separator), whereby water collected on the flat surfaces of the vanes will travel backwardly to the channels and be directed downwardly into a collecting ba'sin.
  • FIG. 1 is a cross-sectional view of the top portion of a nuclear steam generator provided with moisture separators formed in accordance with the invention
  • FIG. 2 is a cross-sectional view of the separators of the invention taken substantially along line II-II of FIG. 1;
  • FIG. 3 is an enlarged top view of a complete vane assembly for one of the four banks shown in FIG. I, incorporating a housing for holding the vanes in place;
  • FIG. 4 is a cross-sectional view taken substantially along line IVIV of FIG. 3 showing the jacking plate of the vane assembly
  • FIG. 5 is a top view of a plurality of spaced vanes fabricated in accordance with the teachings of the invention and showing the manner in which the moistureladen gas passes therethrough.
  • FIG. 1 the upper portion of .a nuclear steam generator 5 is shown and includes an outer housing 10. Steam generated therein, in a manner not shown but well known in the art, passes upwardly along the direction of the arrows through a passage 12 containing acentrifugal separator 14. From separator 14,, the steam passes into a chamber 16 of generally annular configuration surrounding a four-bank moisture separator, generally indicated by the reference numeral 18. As shown in FIG. 2, the moisture separator 18 includes four banks 20A, 20B, 20C and 20D of vanes 22, the details of which will hereinafter be described. The steam, after passing from chamber 16 through the vanes 22 in banks 20A-20D passes into a generally rectangular space 24 within the banks and thence upwardly through a perforated plate 26 to a steam outlet 28.
  • vanes 22 of the banks 20A- 20D In passing through the vanes 22 of the banks 20A- 20D, moisture is removed from the steam in a manner hereinafter described such that when the gas reaches the outlet 28, it is essentially free from moisture.
  • the vanes 22 are supported on perforated plates 30 at the bottom of each bank 20A-20D.
  • the moisture collected by the vanes 22 is directed downwardly through the perforated plates 30 into a chamber 32 and thence into a basin 34 where it flows into a drain 36 leading back to the lower or steam generating portion of the steam generator 5, not shown.
  • the condensate can be drained directly back to the lower portion of the steam generator 5 from the chamber 32 by means of a conduit 38.
  • Additional drains 40 and 42 are provided for draining any moisture which collects within the space 24 within the banks 20A-20D and above the banks, respectively.
  • Walls 40A and 408 separate the moisture-laden chamber 16 from the chamber 24 within the four-bank moisture separator 18 and the chamber 42 above the separator which communicates with the outlet 28.
  • a perforated plate 44 may be positioned immediately in front of the vanes 22 of the separator 18 such that the moistureladen gas, in striking the perforated plate, will have its moisture particle size reduced before it passes through the vanes 22.
  • the perforated plate 44 also increases the pressure drop, thereby producing a more uniform distribution of flow across the face of the separator.
  • the second perforation plate 26 can be added at the outlet section to help produce a more uniform distribution of flow across the face of the separator.
  • Perforated plate 44 can be used either in addition to plate 26 or by itself.
  • FIG. 3 A typical top cross-sectional view of a separator bank is shown in FIG. 3. It includes a housing 46 having channel-shaped end plates 48 and 50 interconnected by top and bottom stringers 51 and 52 (FIG. 1), only the bottom stringers 52 being shown in FIG. 3. This leaves large openings 54 in the side walls of the bank assembly such that the gas or vapor may flow through the bank from one opening to the other in the direction of arrow 55.
  • the assembly of vanes 22 is bounded on one side by a jacking plate 56 and on the opposite end by the end plate 48.
  • Spacers 58 are welded to the vane 22A which in turn is welded to the jacking plate 56. Consequently, the vane 22A, the jacking plate 56 and the spacers 58 can be removed from the housing 46 as a single unit (FIG. 4). Spacers 60 and 62 are welded to vane 223 but not to the next successive vane 22C (not shown in FIG. 3) such that vane 22B and its spacers 60, 62 can be removed as a unit.
  • each vane is fabricated from a single sheet of metal which is formed by a press brake, by stamping or by forming rolls into the configuration shown.
  • each of the vanes 22A through 22D comprises a plurality of adjoining portions 68A, 68B, 68C, and so on, disposed at an angle with respect to each other to form a generally zigzag configuration.
  • Each portion, such as portion 68B, comprises a first section 70 connected at an angle, as by bend 72 to the next portion 68C and folded upon itself to form a lip 74 which extends along the entire vertical length of the vane.
  • a U-shaped channel 76 Contiguous with the folded section 74 is a U-shaped channel 76 also extending along the length of the vane and having one side comprising the folded section 74. Finally, the U-shaped channel section is contiguous with a straight section 78 parallel to the lip 74. The section 78 is connected at an angle, as by bend 80, to the section 70 of the next preceding portion 68A of the vane.
  • a gas stream laden with liquid particles entering the vanes from the right as viewed in FIG. will travel along the direction of the arrows shown; and in so doing it will follow a sinuous path, its direction of movement being constantly changed as it flows through the paths defined by the vanes. This causes a turbulence in the gas; and the entrained droplets are forced against the walls of the vanes where they impinge and adhere to the vanes surface. This liquid then moves to the channels 32 and then drains downwardly into the basin 18 shown in FIG. 1. It will be noted that as the gas travels from right to left in FIG. 5, the entrained liquid droplets decrease in number until, when the gas reaches the left ends of the vanes, it is essentially free from moisture.
  • the present invention thus provides a vane for a separator formed from a single sheet of metal rather than a corrugated sheet having L-shaped members welded thereto to form pockets. This eliminates the problems encountered in welding and materially reduces the cost of the product.
  • each vane is formed from a single sheet of metal, the vane having adjoining portions disposed at an angle with respect to each other to form said zig-zag configuration, each of said portions having a first section connected at an angle to the preceding portion and folded upon itself to form a folded section and a lip extending along the length of said vane,- a reversely bent section contiguous with said folded section and forming a U- shaped channel spaced from the preceding portion and extending along the length of the vane with one side of the U-shaped channel comprising said folded section, and a flat section contiguous with said U-shaped channel section and extending parallel to said lip, said fiat section
  • each of the spacers is secured to an associated vane and is disposed in free abutment with an adjacent vane, and each of said vanes and its associated spacers is removable from said housing independently of the others.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Separating Particles In Gases By Inertia (AREA)
US00007694A 1970-02-02 1970-02-02 Formed vane elements for liquid-vapor separators Expired - Lifetime US3805496A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US00007694A US3805496A (en) 1970-02-02 1970-02-02 Formed vane elements for liquid-vapor separators
DE2104355A DE2104355C3 (de) 1970-02-02 1971-01-30 Vorrichtung zur Abscheidung von Wasser oder anderen Beladungen strömender Dämpfe und Gase
CA104,091A CA953659A (en) 1970-02-02 1971-02-01 Formed vane elements for liquid-vapor separators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00007694A US3805496A (en) 1970-02-02 1970-02-02 Formed vane elements for liquid-vapor separators

Publications (1)

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US3805496A true US3805496A (en) 1974-04-23

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US (1) US3805496A (de)
CA (1) CA953659A (de)
DE (1) DE2104355C3 (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3961922A (en) * 1975-01-02 1976-06-08 Dallas Research Enterprises Vane separator
US4478614A (en) * 1982-12-03 1984-10-23 Jonelis John A Electrostatic precipitator construction having spacers
US4647296A (en) * 1985-11-08 1987-03-03 Mississippi Power Company Spacers for straightening warped precipitator curtains
US4738698A (en) * 1986-05-14 1988-04-19 Novatome Finned liquid particles separator
US4968328A (en) * 1986-05-16 1990-11-06 Duke Eddie D De-mister baffle and assembly
US5268011A (en) * 1991-06-11 1993-12-07 Dieter Wurz Mist eliminator
US20070137154A1 (en) * 2005-12-16 2007-06-21 Joseph Agnello Vane-type demister
US20100071560A1 (en) * 2008-09-22 2010-03-25 Mark Daniel Composite vane and method of manufacture

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2486201A1 (fr) * 1980-07-02 1982-01-08 Framatome Sa Ensemble de sechage pour generateur de vapeur, destine notamment aux generateurs de vapeur de reacteurs nucleaires
DE3635085A1 (de) * 1986-10-15 1988-06-16 Schmid Rudolf Martin Selbstreinigendes filter fuer gasfoermige medien kompakt-system mit staubeintrittsueberhoehung verfahren und ausfuehrung dazu
SE509216C2 (sv) * 1997-09-08 1998-12-21 Vattenfall Ab Ångutloppsanordning med dysa och fördelningskupa, placerad i en ånggenerators tak

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1896656A (en) * 1930-09-10 1933-02-07 B F Sturtevant Co Assembly of metal surfaces
US2007966A (en) * 1933-02-28 1935-07-16 Babcock & Wilcox Co Steam separator
US2643736A (en) * 1951-07-30 1953-06-30 Edwin W Smith Stripping vane for separators
US3520116A (en) * 1968-12-23 1970-07-14 Peerless Mfg Co Vapor-liquid separator having improved vane spacer means
US3527030A (en) * 1967-09-19 1970-09-08 Ernest C Hungate Eliminator structure
DD223099A1 (de) * 1984-03-16 1985-06-05 Polygraph Leipzig Verfahren und einrichtung zum spannen grossflaechiger werkstuecke

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1896656A (en) * 1930-09-10 1933-02-07 B F Sturtevant Co Assembly of metal surfaces
US2007966A (en) * 1933-02-28 1935-07-16 Babcock & Wilcox Co Steam separator
US2643736A (en) * 1951-07-30 1953-06-30 Edwin W Smith Stripping vane for separators
US3527030A (en) * 1967-09-19 1970-09-08 Ernest C Hungate Eliminator structure
US3520116A (en) * 1968-12-23 1970-07-14 Peerless Mfg Co Vapor-liquid separator having improved vane spacer means
DD223099A1 (de) * 1984-03-16 1985-06-05 Polygraph Leipzig Verfahren und einrichtung zum spannen grossflaechiger werkstuecke

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3961922A (en) * 1975-01-02 1976-06-08 Dallas Research Enterprises Vane separator
US4478614A (en) * 1982-12-03 1984-10-23 Jonelis John A Electrostatic precipitator construction having spacers
US4647296A (en) * 1985-11-08 1987-03-03 Mississippi Power Company Spacers for straightening warped precipitator curtains
US4738698A (en) * 1986-05-14 1988-04-19 Novatome Finned liquid particles separator
US4968328A (en) * 1986-05-16 1990-11-06 Duke Eddie D De-mister baffle and assembly
US5268011A (en) * 1991-06-11 1993-12-07 Dieter Wurz Mist eliminator
US20070137154A1 (en) * 2005-12-16 2007-06-21 Joseph Agnello Vane-type demister
US7618472B2 (en) * 2005-12-16 2009-11-17 Uop Llc Vane-type demister
US20100071560A1 (en) * 2008-09-22 2010-03-25 Mark Daniel Composite vane and method of manufacture
US7686862B1 (en) * 2008-09-22 2010-03-30 Peerless Mfg. Co. Composite vane and method of manufacture

Also Published As

Publication number Publication date
DE2104355A1 (de) 1971-10-21
DE2104355C3 (de) 1980-10-30
DE2104355B2 (de) 1980-02-14
CA953659A (en) 1974-08-27

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