US3809016A - Steam generator with flat combustion chamber bottom - Google Patents

Steam generator with flat combustion chamber bottom Download PDF

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Publication number
US3809016A
US3809016A US00302277A US30227772A US3809016A US 3809016 A US3809016 A US 3809016A US 00302277 A US00302277 A US 00302277A US 30227772 A US30227772 A US 30227772A US 3809016 A US3809016 A US 3809016A
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US
United States
Prior art keywords
tubes
combustion chamber
bottom wall
steam generator
wall
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
Application number
US00302277A
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English (en)
Inventor
R Kral
H Bruckner
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.)
Kraftwerk Union AG
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Kraftwerk Union AG
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 Kraftwerk Union AG filed Critical Kraftwerk Union AG
Application granted granted Critical
Publication of US3809016A publication Critical patent/US3809016A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F22B37/10—Water tubes; Accessories therefor
    • F22B37/14—Supply mains, e.g. rising mains, down-comers, in connection with water tubes
    • F22B37/146—Tube arrangements for ash hoppers and grates and for combustion chambers of the cyclone or similar type out of the flues

Definitions

  • This invention relates to a steam generator of the type having a combustion chamber formed by suspended wall tubing in which adjacent tubes are welded gastight and wherein the tubes extend spirally upwardly on all sides, and further of the type having a flat or substantially flat combustion chamber bottom in which the tubing of the combustion chamber bottom extends to the side walls and continues as the side wall tubing.
  • the tube configuration of the combustion chamber side walls can usually be carried over readily into the area of the ash funnel.
  • the combustion chamber bottom tubes are to extend or be carried over directly into the side wall tubes, the number of the parallel tubes that must be accommodated in the combustion chamber bottom is predetermined.
  • the mutual spacing of the tubes can be varied only within narrow limits because only relatively slight differences exist as regards the individual tube pitches which are mainly determined by the width of the fins. The aforementioned problems are overcome by the present invention.
  • the present invention provides a central input distributor from which connecting tubes lead to entrance locations of the bottom tubes, which define the combustion chamber bottom wall. These entrance locations are situated in the general plane of the combustion chamber bottom tube wall and are arranged predominantly along vector lines originating from the center of the bottom wall and extending to a length equal to about one-half the length of the diagonal lines and extending at an acute angle relative to the diagonal lines. All the bottom tubes or substantially all of them extend to the outer edge of the combustion chamber bottom wall from the entrance location via two 90 degree turns in such a manner as to provide for heated tube lengths in the combustion chamber bottom which are all substantially equal.
  • the entrance locations at the end of the vector or diagonal lines may also be arranged along an extension line which extends at an obtuse angle. The 90 degree turns may be effected by fittings, angles or elbows.
  • FIG. 1 is a plan view and schematic representation of a combustion chamber bottom according to one embodiment of the invention with only portions of the bottom tubes which define the bottom wall being shown;
  • FIG. 2 is a schematic representation of a sectional view taken along the line IIII of FIG. 1;
  • FIG. 3 is an enlarged plan view of a portion of the bottom wall shown looking at the area of the lower portion of the lower vector line 14 shown in FIG. 1;
  • FIG. 4 is an enlarged plan view of a portion of the bottom wall shown looking at the area of the lower portion of the lower vector line 14 shown in FIG. 1;
  • FIG. 5 is a cross-sectional view taken along the line VV in FIG. 4;
  • FIG. 6 is a view similar to FIG. 4 but relating to an alternate embodiment
  • FIG. 7 is a cross-sectional'view taken along the line VII-VII in FIG. 6;
  • FIG. 8 is an enlarged plan view of a portion of the bottom wall shown looking at the area of the upper portion of the upper vector line 15 shown in FIG. 1;
  • FIG. 9 is a cross-sectional view taken along the line IXIX in FIG. 8.
  • FIG. 10 is a view similar to FIG. 8 but relating to an alternate embodiment.
  • FIG. 1 shows a combustion chamber bottom of rectangular configuration as viewed from the top.
  • the operating medium or fluid is fed to the tubes forming the combustion chamber bottorn by pipelines 1 and 2.
  • An input distributor consisting of two sections 3 and 4 with an equalization line 5 therebetween is arranged underneath the bottom of the combustion chamber as can best be seen in FIG. 2.
  • Connecting tubes for example connecting tubes 6, 7 and 8, 9, lead from the input distributor sections 3 and 4 to entrance locations, for example entrance locations 10, 11, 12 and 13 located in the general plane of the combustion chamber bottom. These entrance locations are situated predominantly on the vector lines 14 and 15. These vector lines are disposed at an acute angle, for example 14 degrees, relative to the respective diagonals which pass through the four corners of the rectangular combustion chamber bottom.
  • extension tubes for example tubes l6, l7 and 18, 19, also have further entrance locations disposed at the ends of the vectors 14 and 15.
  • Each tube in the combustion chamber bottom has two turns of each extending from its entrance location to the outer edge of the com-
  • the tubing in the example of the illustrated embodiment may have 344 parallel tubes with a tube pitch of 52 mm. As will be seen from the drawings, particularly FIG. 1, the differences in lengths of the heated tubes in the combustion chamber bottom are only minor. As shown in FIG. 2, the tubes pass immediately at the edge of the combustion chamber bottom into the helical winding of the side walls.
  • FIG. 3 shows an enlarged section of a portion of the area along the lower portion of vector line 14 of FIG. 1.
  • Tubes 20 to 28 extend vertically upwardly from below the combustion chamber bottom and are then formed with a turn or are otherwise bent to form the bottom tubing defining the combustion chamber bottom. It will be seen that all the feed tubes lie along the lines 14a and 14!).
  • Tubes 29 to 32 extend vertically upwardly along the extension line 17. In the area of the combustion chamber bottom, all of the tubing is provided with fins so that gastight welding can be achieved between adjacent tubes.
  • the tube sections can be provided with fittings, angles or elbows to effect the necessary turns.
  • common fin tubes can be used for the combustion chamber bottom. These tubes are welded to the fittings in a simple manner.
  • the fittings have fins of the same dimensions as the fins on the fin tubes.
  • tube elbows are used to effect the turns.
  • gastight welding of the entire tube bottom can be effected.
  • FIGS. 8 and 9 illustrate on an enlarged scale the use of forged angles and FIG. 10, the use of elbows.
  • the tubes are provided with fins and it is possible also to obtain gastight welding of the tubes and elbows which form the combustion chamber bottom.
  • a steam generator comprising a combustion chamber having side walls and a bottom wall, bottom tubes defining a flat combustion chamber bottom wall, said bottom wall tubes extending to the edges of said bottom wall and continuing upwardly to form said combustion chamber side walls, means disposed below said bottom wall for feeding fluid medium to said bottom wall tubes, said means comprising a plurality of entrance locations disposed generally in the plane of said bottom wall and at which said fluid medium enters said bottom wall tubes, said entrance locations being disposed substantially along two substantially perpendicular vector lines which intersect generally at the center of said bottom wall, said bottom tubes being arranged and disposed such that substantially all of the bottom tubes are each provided with two 90 degree turns in passing between its respective entrance location and said side wall and wherein the lengths of each of said bottom wall tubes is substantially equal.
  • combustion chamber is of the type which is suspended from a boiler frame, said combustion chamber side wall being formed by side wall tubes extending spirally upwardly from said bottom wall, means joining adjacent bottom wall tubes and adjacent side wall tubes to one another to form gastight bottom and side walls.
  • said means disposed below said bottom wall comprises a central input distributor and connecting tubes leading from said central input distributor to said entrance locations.
  • entrance locations are also arranged at the outer ends of said vector lines along an extension line disposed at an obtuse angle relative to the respective vector line.
  • Steam generator means comprising a substantially rectangular combustion chamber having walls and a bottom, a plurality gastight welded and upwardly extending tubes in said walls, a plurality of bottom tubes connected to said wall tubes, each tube of the combustion chamber bottom being so bent that it forms an angle of less than 45 with a wall of the combustion chamber, the entrance points of said bottom tubes situated in the said plane of the bottom being positioned on predetermined vector lines positioned substantially perpendicular to each other and intersecting substantially in the center of the bottom of the combustion chamber, said vector lines being located at an obtuse angle to the combustion chamber walls looking downwardly substantially 90 greater than the angle that said bottom tubes form with the walls of the combustion chamber at the junction of the wall and the bottom.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion Of Fluid Fuel (AREA)
  • Feeding And Controlling Fuel (AREA)
US00302277A 1971-10-29 1972-10-30 Steam generator with flat combustion chamber bottom Expired - Lifetime US3809016A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2153965A DE2153965B2 (de) 1971-10-29 1971-10-29 Dampferzeuger mit ebenem Brennkammerboden

Publications (1)

Publication Number Publication Date
US3809016A true US3809016A (en) 1974-05-07

Family

ID=5823746

Family Applications (1)

Application Number Title Priority Date Filing Date
US00302277A Expired - Lifetime US3809016A (en) 1971-10-29 1972-10-30 Steam generator with flat combustion chamber bottom

Country Status (8)

Country Link
US (1) US3809016A (da)
JP (1) JPS5640241B2 (da)
DE (1) DE2153965B2 (da)
DK (1) DK130029B (da)
FR (1) FR2159037A5 (da)
GB (1) GB1362102A (da)
IT (1) IT969936B (da)
NL (1) NL173883C (da)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4546731A (en) * 1983-08-31 1985-10-15 Sulzer Brothers Limited Heat exchanger having a gas flue

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4135575A (en) * 1976-05-13 1979-01-23 Balcke-Durr Aktiengesellschaft Tube wall made of tubes which extend parallel to one another and horizontal to inclined
GR20010100548A (el) * 2000-12-12 2002-09-26 Alstom Power Boiler Gmbh Ατμοπαραγωγος
JP6817983B2 (ja) * 2018-06-15 2021-01-20 株式会社技研製作所 駐車システム

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3259109A (en) * 1963-04-18 1966-07-05 Licentia Gmbh Tubing
US3354870A (en) * 1965-10-20 1967-11-28 Babcock & Wilcox Co Tube fitting arrangement for furnace bottom
US3376859A (en) * 1965-10-05 1968-04-09 Sulzer Ag Pipe lining for a steam generator
US3395677A (en) * 1966-02-04 1968-08-06 Sulzer Ag Tube lining for prismatic combustion chambers
US3457903A (en) * 1967-08-30 1969-07-29 Ernest C Huge Furnace floor arrangement

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5117103B2 (da) * 1972-08-04 1976-05-31

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3259109A (en) * 1963-04-18 1966-07-05 Licentia Gmbh Tubing
US3376859A (en) * 1965-10-05 1968-04-09 Sulzer Ag Pipe lining for a steam generator
US3354870A (en) * 1965-10-20 1967-11-28 Babcock & Wilcox Co Tube fitting arrangement for furnace bottom
US3395677A (en) * 1966-02-04 1968-08-06 Sulzer Ag Tube lining for prismatic combustion chambers
US3457903A (en) * 1967-08-30 1969-07-29 Ernest C Huge Furnace floor arrangement

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4546731A (en) * 1983-08-31 1985-10-15 Sulzer Brothers Limited Heat exchanger having a gas flue

Also Published As

Publication number Publication date
JPS5640241B2 (da) 1981-09-19
IT969936B (it) 1974-04-10
DE2153965B2 (de) 1974-09-12
NL7213978A (da) 1973-05-02
DK130029C (da) 1975-05-20
DK130029B (da) 1974-12-09
DE2153965A1 (de) 1973-05-03
NL173883C (nl) 1984-03-16
JPS4851101A (da) 1973-07-18
NL173883B (nl) 1983-10-17
FR2159037A5 (da) 1973-06-15
GB1362102A (en) 1974-07-30

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