US3129698A - Forced flow steam generator - Google Patents

Forced flow steam generator Download PDF

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Publication number
US3129698A
US3129698A US96015A US9601561A US3129698A US 3129698 A US3129698 A US 3129698A US 96015 A US96015 A US 96015A US 9601561 A US9601561 A US 9601561A US 3129698 A US3129698 A US 3129698A
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Prior art keywords
tubes
structural steel
vertical
corner
vertical tubes
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Expired - Lifetime
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US96015A
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English (en)
Inventor
Davis Reginald Frank
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Sulzer AG
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Sulzer AG
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Publication date
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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
    • F22B37/62—Component parts or details of steam boilers specially adapted for steam boilers of forced-flow type
    • F22B37/64—Mounting of, or supporting arrangements for, tube units
    • F22B37/68—Mounting of, or supporting arrangements for, tube units involving horizontally-disposed water tubes

Definitions

  • the present invention relates to forced-flow steam generators and particularly to the combustion chamber structure thereof.
  • the tubular furnace walls of a forced-flow steam generator are carried by substantially vertical support tubes serving as feeder tubes and arranged at the corners of the furnace, each furnace wall comprising a series of serpentine tubes to which operating fluid is supplied by said feeder tubes.
  • the feeder tubes are hung on a supporting framework and the tubes forming the side walls of the furnace are connected to supporting frames composed of bars and plates, said frames being partly rigidly and partly slidingly connected to tubes forming the furnace wall as well as to the vertical support tubes to afford expansion and contraction under varying temperature conditions.
  • FIG. 1 is a diagrammatic rear view of a combustion chamber wall according to the invention with parts broken off or removed and showing only one supporting frame.
  • FIG. 2 is a horizontal sectional view of tubes near a corner of a combustion chamber one wall whereof is shown in FIG. 1; the section is made along line AB in FIG. 1.
  • FIG. 3 is a vertical sectional view of a support frame with combustion chamber wall tubes connected thereto, the section being made along line 0-D of FIG. 1.
  • FIG. 4 is a vertical sectional view of a support frame showing its connection to a vertical corner tube, the section being made along line EF of FIG. 1.
  • FIG. 5 is an elevation of a portion of a group of tubes in the neighborhood of a rectangular bend at the transition from the vertical support tubes to the horizontal wallforming tubes.
  • FIG. 6 is a horizontal sectional view taken along line GH of FIG. 1, of one of the four corners of a rectangular combustion chamber.
  • the other corners, not shown, are constructed in the same manner as the illustrated corner.
  • an evaporating tube section 1 is provided on each wall of a combustion chamber whose horizontal section is substantially rectangular. Only one wall formed by one evaporating tube section and four vertical tubes of a second evaporating section are shown in FIG. 1.
  • Each tube section is formed by a group of seven juxtaposed tubes, four of the tubes being numbered 2, 3, 4, 5.
  • the tubes have horizontal portions forming panels, the tubes of one panel being connected by vertical or hairpin-like portions to the tubes of the preceding and of the subsequent panels.
  • the tubes are continuous and extend in serpentine fashion from the bottom end to the top end of the respective wall. Substantially vertical, laterally tangent tubes are placed at the four corners of the furnace and form groups of seven tubes at each corner.
  • the diameter of the vertical tubes is greater than that of the wall forming serpentine tubes.
  • the vertical tubes at the right corner and visible in FIG. 1 are numbered 9, 8, 7, 6, three more tubes being placed behind the tube 6.
  • the tubes at the left corner and visible in FIG. 1 are numbered 13, 12, 11, 6, three more tubes being behind tube 6.
  • the tubes of each group of vertical corner tubes are individually connected to the tubes forming one wall of the furnace and serve to feed operating medium into the wall tubes.
  • the vertical tubes depend from a supporting framework or structure 34 and serve as supports for frames to which the tubes forming the furnace walls are connected,
  • grooveand-tongue joints 14, 15 are provided as shown in FIG. 3.
  • Similar joints 16, 17 are provided between the vertical marginal tube portions of the wall panels and the neighboring vertical corner tubes as shown in FIG. 2.
  • the weight of the tubular wall panels is transferred to the respective vertical corner tubes by a framework including horizontal channels or U-beams 21 and 26 extending across the furnace walls.
  • the horizontal tubes 2, 3, 4, 5 of each panel are welded to vertical rods 18 for fixing the tubes in vertical planes.
  • the welds are arranged in staggered or offset relation, preferably two tubes being left unwelded between two welded tubes.
  • An upper lug 19 and a lower lug 21) are welded to every fourth rod 18.
  • the lower channels 21 are supported by brackets 22 (FIG. 4) welded to the corner tubes.
  • the channels 21 are provided with vertical webs 23 parallel and corresponding to the lugs 20 which extend through suitable apertures in the Web of the channel 21.
  • the adjacent lugs 20 and webs 23 are connected by pins 24 connected to the lugs and extending through vertical slots 25 in the webs 23 to permit relative vertical movement of the lugs and webs. This construction also permits relative horizontal movement of the lugs and webs.
  • the channels 26, which are placed above and spaced from the channels 21, are connected to the channels 21 by vertical T-irons or uprights 27.
  • flat steel plates 23 are welded to and interconnect the channels and fill the spaces between the channels and the uprights 2'7.
  • Bolts 39 mounted on the lugs 19 and extending loosely through bores in spaced webs welded to the channels 26, and placed normal to the lugs and webs transfer the weight of the panels to the channels 26 and permit relative h0rizontal movement.
  • the upper channels 26 are connected to the respective vertical corner tubes by sliding points each joint comprising a lug 31 and a pin 33 connected thereto, the pin extending through vertical slots 31 in the opposed end faces of the elements 26. These joints are similar to the joints 24, 25 to permit relative vertical movement of the upper channels and the respective corner tubes.
  • short aligning bars 32 are alternately welded in offset relation to the tubes forming the wall panels in the neighborhood of the bends between the horizontal portions of the tubes and the vertical corner tubes.
  • the bars 32 slidingly engage the respective neighboring tubes to fix the tubes in a plane while permitting relative longitudinal expansion of the tubes.
  • Refractory sealing material 36 is applied to the back side of the tube panels and is about as thick as the rods 18 in order to prevent escape of combustion gas.
  • Casing plates 35 are welded to the support frames in back of the refractory material and form, together with the plates of the support frames, a gastight skin provided with expansion joints and reinforcements in the conventional manner. Outside the skin casing is an outer casing containing insulating material for the boiler walls.
  • Horizontal strap elements are connected to the upper and lower channels and extend from corner to corner of the furnace. The ends of these elements are connected at the corners of the furnace to counteract horizontal pressure caused by explosions within the combustion chamber. These strap elements are connected to the casing and to one another by bolt joints permit-ting relative movement in certain directions in a manner similar to that adopted in known designs of skin casing for other than forcedflow steam generators.
  • the support frames and the skin have, due to the outer insulation, substantially the same temperature as the fluid in the tubes and expand with the tubes.
  • the fluid temperature in the panel coils increases progressively and continuously from bottom to top of the steam generator. Therefore, the upper portions of the structure expand more than the lower.
  • the corner tubes have a lower temperature than the tubes of the wall panels because the operating fluid enters the top end of the corner tubes.
  • a forced-flow steam generator comprising a combustion chamber of angular horizontal cross section and having a plurality of side Walls and corners therebetween, a supporting framework, substantially vertical tubes placed in each corner of said combustion chamber and hung on said framework, a plurality of said vertical tubes being placed in the plane of one of the side walls extending from the corner and a plurality of said vertical tubes being placed in the plane of the second side wall extending from said corner:
  • each of said support frames comprising a horizontal structural steel element at the upper end of the frame, a horizontal structural steel element at the lower end of the frame, and a steel plate placed between said structural steel elements.
  • a forced-flow steam generator comprising a combustion chamber of angular horizontal cross section and having a plurality of side walls and corners therebetween, a supporting framework, a plurality of substantially vertical tubes placed in each corner of said combustion chamher and hung on said framework, each of said side walls being formed by a plurality of tubes bent in serpentine fashion and placed in a plane, said wall-forming tubes being connected to said vertical tubes to receive operating medium therefrom, at least one support frame for each side wall, each of said support frames being composed of structural steel elements and steel plates, support brackets connected to said vertical tubes outside of the combustion chamber, said support frames resting on said brackets, sliding connections slidably connecting said support frames to said vertical tubes and to said wall-forming tubes, one of said support brackets and a lug being welded in axially spaced relation to at least one of said vertical tubes in each corner, a web connected to the support frame supported by said bracket, said lug and said web being placed side by side and in parallel relation, said web having a vertically slotted hole, and
  • a forced-flow steam generator comprising a combustion chamber of angular horizontal cross section and having :a plurality of side Walls and corners therebetween, a supporting framework, a plurality of substantially vertical tubes placed in each corner of said combustion chamber and hung on said framework, each of said side walls being formed by a plurality of tubes bent in serpentine fashion and placed in a plane, said wall-forming tubes being connected to said vertical tubes to receive operating medium therefrom, at least one support frame for each side wall, each of said support frames being composed of structural steel elements and steel plates, support brackets connected to said vertical tubes outside of the combustion chamber, said support frames resting on said brackets, and sliding connections slidably connecting said support frames to said vertical tubes and to said wall-forming tubes, each of said support frames including a lower horizontal channel, an upper horizontal channel spaced from said lower channel, and vertical elements interconnecting said channels, said lower channel resting on said support brackets and being vertically movably connected to said wall-forming tubes, said upper channel being vertically movably connected to said vertical tubes and being
  • each of said structural steel elements is formed by a channel, uprights being provided interconnecting said channels, and said plates being placed parallel to and filling the spaces between said uprights and said channels.
  • each of said vertical tubes is connected to one of said tubes bent in serpentine fashion for supplying operating medium thereto.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)
  • Combustion Of Fluid Fuel (AREA)
US96015A 1960-03-18 1961-03-15 Forced flow steam generator Expired - Lifetime US3129698A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9777/60A GB985965A (en) 1960-03-18 1960-03-18 Improvements in or relating to forced-flow steam generators

Publications (1)

Publication Number Publication Date
US3129698A true US3129698A (en) 1964-04-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
US96015A Expired - Lifetime US3129698A (en) 1960-03-18 1961-03-15 Forced flow steam generator

Country Status (6)

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US (1) US3129698A (de)
BE (1) BE601503A (de)
CH (1) CH383404A (de)
ES (1) ES265819A1 (de)
FR (1) FR1284302A (de)
GB (1) GB985965A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3232282A (en) * 1961-12-01 1966-02-01 Sulzer Ag Wall lining for steam generators
US3259109A (en) * 1963-04-18 1966-07-05 Licentia Gmbh Tubing
US20050056020A1 (en) * 2003-08-26 2005-03-17 Honeywell International Inc. Tube cooled combustor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT378249B (de) * 1973-06-15 1985-07-10 Waagner Biro Ag Von rohrwaenden gebildete brennkammer eines dampferzeugers

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2700375A (en) * 1946-12-03 1955-01-25 Babcock & Wilcox Co Fluid cooled furnace wall
DE937351C (de) * 1951-05-27 1956-01-05 Giesserei G M B H Abstuetzung von Nachheizflaechen in senkrechten Einzug-Strahlungskesseln
US2896591A (en) * 1957-07-15 1959-07-28 Combustion Eng Furnace wall for forced once-through boiler
US2989036A (en) * 1954-04-28 1961-06-20 Duerrwerke Ag Once-through vapor generating and superheating units
US2999483A (en) * 1957-11-08 1961-09-12 Combustion Eng Furnace wall and support construction
US3030937A (en) * 1958-01-10 1962-04-24 Combustion Eng Furnace wall and support

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2700375A (en) * 1946-12-03 1955-01-25 Babcock & Wilcox Co Fluid cooled furnace wall
DE937351C (de) * 1951-05-27 1956-01-05 Giesserei G M B H Abstuetzung von Nachheizflaechen in senkrechten Einzug-Strahlungskesseln
US2989036A (en) * 1954-04-28 1961-06-20 Duerrwerke Ag Once-through vapor generating and superheating units
US2896591A (en) * 1957-07-15 1959-07-28 Combustion Eng Furnace wall for forced once-through boiler
US2999483A (en) * 1957-11-08 1961-09-12 Combustion Eng Furnace wall and support construction
US3030937A (en) * 1958-01-10 1962-04-24 Combustion Eng Furnace wall and support

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3232282A (en) * 1961-12-01 1966-02-01 Sulzer Ag Wall lining for steam generators
US3259109A (en) * 1963-04-18 1966-07-05 Licentia Gmbh Tubing
US20050056020A1 (en) * 2003-08-26 2005-03-17 Honeywell International Inc. Tube cooled combustor
US7043921B2 (en) * 2003-08-26 2006-05-16 Honeywell International, Inc. Tube cooled combustor

Also Published As

Publication number Publication date
GB985965A (en) 1965-03-10
FR1284302A (fr) 1962-02-09
CH383404A (de) 1964-10-31
ES265819A1 (es) 1961-06-16
BE601503A (fr) 1961-07-17

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