US3292597A - Partition for boiler firing chamer - Google Patents

Partition for boiler firing chamer Download PDF

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Publication number
US3292597A
US3292597A US439523A US43952365A US3292597A US 3292597 A US3292597 A US 3292597A US 439523 A US439523 A US 439523A US 43952365 A US43952365 A US 43952365A US 3292597 A US3292597 A US 3292597A
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United States
Prior art keywords
tubes
partition
working medium
legs
firing chamber
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Expired - Lifetime
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US439523A
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English (en)
Inventor
Bredtschneider Walter
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.)
Siemens Schuckertwerke AG
Siemens Corp
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Siemens Corp
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Publication date
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Publication of US3292597A publication Critical patent/US3292597A/en
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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
    • F22B37/40—Arrangements of partition walls in flues of steam boilers, e.g. built-up from baffles

Definitions

  • My invention relates to steam generators. More particularly, it relates to forced-flow steam boilers of the once-through or series type in which the feedwater is heated, evaporated and the generated steam superheated in a single pass through the tube system of a drumless boiler.
  • the firing chambers thereof may be subdivided into a plurality of combustion chambers by at least one partition.
  • Such subdivision is often provided in this manner in larger boilers in order to enable the reduction of the height of the boiler.
  • partitions to efiect subdivision of the combustion chambers, many difiiculties are encountered. For example, it is difiicult to design the partitions with sufiicient required rigidity since the supporting structures for the partitions and the partitions with their associated bracing members are subjected to extremely high temperatures during the operation of the boilers whereby great thermal deformations result therein.
  • partitions which consist solely of tubes traversed by the working medium, i.e., the fiuid heated by the boiler.
  • partition forming tubes have been arranged to extend downwardly from the roof of the boiler firing chamber and thence through slide gaps to the outside of the chamber.
  • slide gaps are difficult to seal and frequently are a source of other problems.
  • a steam boiler having a firing chamber which is partitioned into a plurality of combustion chambers by at least one partition, the partition being so constructed whereby the supporting structures therefor are preserved from warping and distortion through their potection against direct heat radiation.
  • the aforesaid objects are attained by effectively forming a partition by providing two spaced parallel arrays of registered closely spaced vertically disposed tubes which are traversed by the working medium.
  • Each of the opposing tubes in the arrays are connected by a base tube whereby there are actually utilized a plurality of open-ended registered U-shaped tubes, each of the tubes formed by two spaced opposing vertically disposed tubes interconnected by a base tube, the bases of the U-shaped tubes forming the base of the array, the planar arrays defining a substantially parallelepiped space therebetween.
  • a plurality of spaced horizontally disposed supoprting bracing members are disposed in this space whereby they provide support but are saved from warping and distortion by being protected from direct heat radiation.
  • the tubes comprising the planar arrays are arranged such that they are alternately traversed, i.e., descendingly or ascendingly, by the working medium, in direct or period alternation.
  • the tubes in the planar arrays are arranged compactly, i.e., closely spaced, even in contact with each other, and protect the support members in the space between the planar arrays from the direct radiation and heating of flame jets. Expansion forces which might cause bending and distortion may be compensated for since upward and downward flow of working medium in the tubes may be made to occur alternately, i.e., serially, in the tubes.
  • the bases of the U-shaped tubes are preferably in the form of expansion loops which impart an elastic capability.
  • the supports located in the space between the two spaced planar arrays of vertically disposed tubes may be arranged to permit the vertically disposed tubes to freely extend in the vertical direction but are prevented from being displaced from the planar arrays.
  • U-shaped tubes are arranged whereby one set of alternately occurring tubes are traversed by the working medium in one direction while the other set of alternately occurring tubes are traversed by the working medium in the opposite direction.
  • adjacent tubes are traversed by the working medium in opposite directions whereas the vertically disposed tubes from both planar arrays which occur serially, i.e., as by zig-zagging across the space between the arrays, are traversed in the same direction by the working medium.
  • Such staggering of direction of working medium flow need not be confined to alternately occurring single U-shaped tubes but may be effected with groups of tubes.
  • the upper ends of the two arrays of vertically disposed tubes may terminate some distance from the roof of the firing chamber to permit accessibility to the space between the arrays and the support structures disposed therein.
  • the vertically disposed tubes which are traversed by the working medium in the same direction may be entirely interconnected or may be interconnected by groups thereof, i.e., groups of downwardly traversed tubes and groups of upwardly traversed tubes which respectively have approximately the same temperatures may be combined by groups to achieve an enhancement of the rigidity of the partition.
  • the partition is essentially formed by the two planar arrays of vertically disposed tubes, the space defined therebetween containing only support structures and not structures forming the partition itself.
  • a structure for effecting the partitioning of the firing chamber of a boiler into a plurality of combustion chambers comprises an array of a plurality of registered closely spaced U-shaped open ended tubes, the tubes being vertically disposed with their bases collectively forming the base of the array, the corresponding legs of the tubes forming two spaced compact substantially planar arrays defining a space therebetween.
  • a plurality of spaced substantially horizontally disposed support members substantially coextensive in length with the width of the planar arrays disposed in the space with structures for connecting some of the legs of each of the planar arrays to the support members.
  • Means are provided connected to the respective ends of the aforesaid ones legs of the tubes for supplying working medium to such legs and for collecting heated working medium from the respective other legs of the tubes.
  • FIG. 2 is a schematic depiction of a front elevation partly in section of a partition constructed in accordance with the principles of the invention
  • FIG. 3 is a schematic depiction of a side elevation of the partition of FIG. 2
  • FIG. 1 is a cross-sectional view of the depiction shown in FIG. 2
  • FIG. 4 is a plan view of the partition constructed according to the invention illustrating the alternate arrangement of working medium traversing paths through adjacently disposed tubes
  • FIGS shows an arrangement in which tubes traversed by the working medium in the same direction may be supportedly connected to the same support member.
  • FIGS. 1 to 4 wherein there is shown 'a partition for a boiler constructed in accordance with the principles of the invention, the firing chamber 1 of substantiatlly rectangular configuration of a boiler, particularly a large boiler, is effectively subdivided into two combustion chambers 3 and 4 by the partition 2.
  • An ash funnel 5 is connected to the base of firing chamber 1 and is common to both combustion chambers 3 and 4.
  • Combustion chambers 3 and 4 are respectively provided with burners 7 and 6, each of burners 7 and 6 comprising a plurality of jets as shown, the presence of burners 7 and 6 enabling the production of heat through coal dust, oil or gas flame.
  • Partition 2 comprises a plurality of registered closely spaced or laterally contacted U-shaped tubes, each of the tubes respectively comprising upright tube sections 8 and 9 which form the legs of the U and a portion of 10 which forms the base of the U, tube portion 10 diverging from tube portions 8 and 9 to be shaped as an expansion loop.
  • the tubes are in side by side close contact and in registration whereby the juxtaposed leg portions 8 and 9 respectively collectively present two vertically disposed substantially planar arrays and the juxtaposed base portions 10 collectively present a substantially planar horizontal surface.
  • Each upright portion 8 or 9 of a tube is individually connected either to an entry distributor 11 or an outlet collector 12, i.e., each tube has one of its upright sections connected respectively to the distributor and the collector.
  • the U-tubes are so connected to the entry distributor and the collector whereby those upright tube portions which are traversed in the same direction are alternately disposed in the array, i.e., are disposed in series arrangement; consequently, the tubes are alternately traversed by the working medium.
  • partition 2 comprising the array of the tubes, is provided with support structures, viz., braces such as those respectively designed by the numeral 13, 14, 15, and 16. As shown these braces are horizontally disposed between upright portions 8 and 9, the upright portions of the tubes being physically connected thereto. Such connection may be readily visualized by examining FIG. 5.
  • a brace such as braces 13, 14, 15 and 16 is shown comprising a horizontally disposed structure 19 to which there are connected tubes 17 and 18 by suitable supports.
  • FIG. 5 is, of course, a schematic detpiction.
  • a brace such as one of braces 13, 14, 15 and 16 may suitably have randomly connected thereto some of tube portions from the group designated by the numeral 8 and some of the tube portions designated by the numeral 9.
  • the tubes may be advantageous to consider the tubes as consisting of two types, viz., thosein which the working medium passes through in an upward direction and those in which the working medium passes through in a downward direction With this latter arrangement, an example of which is schematically illusstrated in FIG.
  • the advantage is presented that upright tube portions having substantially the same temperature are connected to the same horizontal support 19 of the brace.
  • the tube portions such as represented by tubes 17 and 18 in FIG. 5 are suitably suspended from the roof of the firing chamber and they carry the supporting structure, i.e., members such as support 19.
  • An arrangement for efiecting the partitioning of the firing chamber of a boiler having burners at the bottom of the firing chamber into a plurality of combustion chambers comprising an array of a plurality of registered closely spaced U-shaped working medium heating tubes, said tubes being vertically suspended within the firing chamber with their bases forming the base of said array and extending to the vicinity of the burners, the corresponding legs of said tubes respectively forming two spaced planar arrays defining a space therebetween, the legs of each of said U-shaped tubes being staggered relative to each other on opposite sides of said partition so that a leg of one tube on one side of said partition is located opposite a corresponding leg of another tube on the other side of said partition, a plurality of spaced substantially horizontally disposed support members substantially coextensive in length with the width of said planar arrays disposed in said space, structures for connecting some of said legs firom each of said arrays to respective ones of said support members, and means connected to the respective upper ends of said tubes for supplying said working medium to and collecting said working
  • An arrangement for effecting the partitioning of the firing chamber of a boiler having burners at the bottom of the firing chamber into a plurality of combustion cham bers comprising an array of a plurality of registered closely spaced open-ended U-shaped working medium heating tubes, each of said tubes being vertically suspended within the firing chamber and comprising two vertically disposed spaced legs and a base connecting said legs and diverging from said legs to form an expansion loop extending to the vicinity of the burners, the corresponding legs of said tubes respectively forming two spaced planar arrays defining a substantially parallelepiped space therebetween, the legs of each of said U-shaped tubes being staggered relatively to each other on opposite sides of said partition so that a leg of one tube on one side of said partition is located opposite a corresponding leg of an other tube on the other side of said partition, the bases forming the base of said tube array, a plurality of spaced substantially horizontally disposed support members substantially coextensive in length with the width of said planar arrays located in said space, structures for connecting some of
  • An arrangement for efiYecting the partitioning of the firing chamber of a boiler having burners at the bottom of the firing chamber into a plurality of combustion chambers comprising an array of a plurality of registered closely spaced U-shaped working medium heating tubes, each of said tubes being vertically suspended within the firing chamber and comprising two vertically disposed spaced legs and a horizontally disposed base connecting said legs and diverging from said legs to form a substantially trapezoidally shaped expansion loop extending to the vicinity of the burners, the corresponding legs of said tubes forming two spaced planar arrays defining a substantially parallelepiped space therebetween, the legs of each of said U- shaped tubes being staggered relative to each other on opposite sides of said partition so that a leg of one tube on one side of said partition is located opposite a corresponding leg of another tube on the other side of said partition, the bases of said tubes forming a horizontal base tor said tube arr-ay, a plurality of spaced substantially horizontally disposed support members substantially coextensive
  • An arrangement for efiecting the partitioning of the firing chamber of a boiler having burners at the bottom of the firing chamber into a plurality of combustion chambers comprising an array of a plurality of registered closely spaced U-shaped working medium heating tubes, each of said tubes being vertically suspended within the firing chamber and comprising two vertically parallel disposed spaced legs and a horizontally disposed base connecting said legs and diverging from said legs to form a substantially trapezoidally shaped expansion loop extending to the vicinity of the burners, the corresponding legs of said tubes forming two spaced planar arrays defining a substantially parallelepiped space therebetween, the legs of each of said U-shaped tubes being staggered relative to each other on opposite sides of said partition so that a leg of one tube on one side of said partition is located opposite a corresponding leg of another tube on the other side of said partition, the bases of said tubes forming a horizontal base for said tube array, a plurality of spaced substantially horizontally disposed support members substantially coextensive in length with the width of said plan
  • An arrangement for elfecting the partitioning of the firing chamber of a boiler having burners at the bottom of the firing chamber into a plurality of combustion chambers comprising an array of a plurality of registered closely spaced U-shaped working medium heating tubes, each of said tubes being vertically suspended within the firing chamber and comprising two vertical parallel disposed spaced legs and a horizontally disposed base connecting said legs and diverging from said legs to form a substantially trapezoidally shaped expansion loop and extending to the vicinity of the burners, the corresponding legs of said tubes forming two spaced planar arrays defining a substantially parallelepiped space therebetween, the legs of each of said U-shaped tubes being staggered relative to each other on opposite sides of said partition .so that a leg of one tube on one side of said partition is located opposite a corresponding leg of another tube on the other side of said partition, the bases of said tube forming a horizontal base for said tube array, working medium supplying means connected to the ends of one set of alternately occurring tubes located in one of said planar array

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)
US439523A 1964-03-13 1965-03-10 Partition for boiler firing chamer Expired - Lifetime US3292597A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES89994A DE1241460B (de) 1964-03-13 1964-03-13 Dampferzeuger mit unterteiltem Feuerraum

Publications (1)

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US3292597A true US3292597A (en) 1966-12-20

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US439523A Expired - Lifetime US3292597A (en) 1964-03-13 1965-03-10 Partition for boiler firing chamer

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US (1) US3292597A (de)
AT (1) AT259582B (de)
DE (1) DE1241460B (de)
FR (1) FR1426633A (de)
GB (1) GB1018358A (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2918835C3 (de) * 1979-05-10 1982-02-18 Balcke-Dürr AG, 4030 Ratingen Zwangdurchlauf-Dampferzeuger

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2305611A (en) * 1940-07-31 1942-12-22 Foster Wheeler Corp Heater
CH295788A (de) * 1943-01-26 1954-01-15 Herpen Co Kg La Mont Kessel Dampferzeuger mit den Feuerraum unterteilenden Zwischenwänden.

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1075782B (de) * 1960-02-18 L. & C. Steinmüller G.m.b.H., Gummersbach (RhId.) Aufhängung von Kesselwänden mit Hilfe von Ankern oder Rohren
DE1121067B (de) * 1959-03-26 1962-01-04 Steinmueller Gmbh L & C Rauchgaszug-Trenn- bzw. Begrenzungswand fuer Roehrendampfkessel

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2305611A (en) * 1940-07-31 1942-12-22 Foster Wheeler Corp Heater
CH295788A (de) * 1943-01-26 1954-01-15 Herpen Co Kg La Mont Kessel Dampferzeuger mit den Feuerraum unterteilenden Zwischenwänden.

Also Published As

Publication number Publication date
FR1426633A (fr) 1966-01-28
DE1241460B (de) 1967-06-01
AT259582B (de) 1968-01-25
GB1018358A (en) 1966-01-26

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