US3814062A - Waste heat boiler with boiler walls and wall portions of finned pipes - Google Patents

Waste heat boiler with boiler walls and wall portions of finned pipes Download PDF

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Publication number
US3814062A
US3814062A US00363941A US36394173A US3814062A US 3814062 A US3814062 A US 3814062A US 00363941 A US00363941 A US 00363941A US 36394173 A US36394173 A US 36394173A US 3814062 A US3814062 A US 3814062A
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United States
Prior art keywords
boiler
pipes
wall
wall member
frame
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Expired - Lifetime
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US00363941A
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English (en)
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F Vollhardt
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SIEGENER AG
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SIEGENER AG
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Priority claimed from DE19732307870 external-priority patent/DE2307870C3/de
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00—Methods of steam generation characterised by form of heating method
    • F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
    • F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
    • F22B1/1869—Hot gas water tube boilers not provided for in F22B1/1807 - F22B1/1861

Definitions

  • the present invention relates to a waste heat boiler with boiler walls and wall portions of finned pipes and with headers and distributors at the lower and upper pipe ends.
  • FIG. I is a diagrammatic longitudinal section through a boiler according to the invention.
  • FIG. 2 represents a section taken along the line II-II of FIG. I and showing two corner connections of the sidewalls of the boiler according to the invention.
  • FIG. 3 illustrates on a larger scale than that of FIG. 1 two adjacent pipes ofa boiler wall, and also shows the reduction in cross-section as it occurs in view of corrosion during the operation of the boiler.
  • FIG. 4 shows the connection of the sidewalls of the boiler with a central wall.
  • FIG. 5 is a top view'of one of the two pivotable pipe surfaces of the boiler ceiling.
  • FIG. 6 illustrates on an enlarged scale, a cutout of the pipe surface of FIG. 5.
  • FIG. 7 is a side view of the pipe surface of FIG. 5.
  • FIG. 8 illustrates a partial longitudinal section through the collecting and distributing connection of the pipe surface according to FIGS. 5 7.
  • FIG. 9 is a cross-section taken along the line IX-IX of FIG. .8.
  • the waste heat boiler with boiler walls and wall portions of finned pipes and with headers and distributors at the lower and upper pipe ends is, according to the present invention, characterized primarily in that for purposes of operating the boiler with waste gases from the waste acid combustion, the combination of the following features is provided:
  • the shape of the wall portions making up the steam generator is symmetrical with regard to thevertical central axis of the steam generator; 3. All connecting openings within the individual pipe wall sections are located symmetrically with regard 'and wall portions are located symmetrically with regard to the plane of the wall;
  • the boiler frame is statically so dimensioned that 2 wall portions or walls and reinforcements can be removed and exchanged without affecting the stability of the boiler.
  • the invention is based on the idea of removing the walls or wall portions in an easy manner from the framework, which walls or wall portions corrode quickly by aggressive acid mist. These walls or wall portions are then turned about their vertical central axis and with their non-corroded side are again installed in the framework.
  • the principle of the invention applies, namely, that after a certain period of operation of the boiler walls or wall portions during which that side of the pipe which faces the interior of the boiler was subjected to a strong corrosion, whereas'the outer side remains unaffected, the unaffected or non-damaged previous outside will become the inside of the boiler walls, and then up to that time, inner side of the boiler wall, will become the outside of the boiler.
  • US. Pat. No. 3,406,664 describes a waste boiler for pyritic roasting gases, according to which the boiler walls are covered by heat exchanger surface sections composed of pipes while the water or steam is passed along a winding path through the serially arranged surface sections of the heat exchanger. The transfer from one section to the next is effected by pipes located outside the boiler outside the wall plane so that in view, of these pipes on one hand, and the asymmetry of the parts on the other hand, a turning will no longer be possible.
  • German Offenlegungsschrift No. 1,776,043 discloses a waste heat steam generator with angle-shaped finned pipes which form an inner chamber for the waste gases. A turning inside out of the pipes is not possible in view of the straight shape of the pipes.
  • the boiler ceiling comprises one or more pipe surfaces which are formed'of finned pipes and which together with their header and distributor connections are turnable about their longitudinal axis and are pivotable about the longitudinal axis of the connection.
  • the turnability of the tubular surface serves a uniform wear on both pipe sides
  • the pivotability of the pipe surface about the longitudinal axis of the connection is provided for purposes of cleaning the interior of the boilerr.
  • the boiler ceiling is preferably formed by hairpin pipes, the ends of which, lead into a subdivided common connection while the dividing partition is arranged in the plane of the hairpin pipes.
  • the'boiler framework G rests on feet 1 and supports the boiler 2, which consists primarily of the walls or wall portions 3, 4, 5, 6, 7 and 8, and of the pipe groups 10, 11 in the two sections A and B of the boiler which are formed, by the partition 9.
  • the boiler comprises an upper boiler ceiling formedby two pipesurfaces l2, 13 which are pivotable along circular arcs K, for instance, into the position 13', and also comprises a lower inflow member 14 into the aggressive waste gas passes through the connection 15 into the boiler.
  • Such aggressive waste gas may, for instance, be the waste gas of an acid burning furnace, which waste is loaded with an acid mist.
  • the withdrawal of the waste gases can be effected in a well-known manner from the upper section of the boiler, which may above the boiler ceiling support additional heat exchanger parts Au.
  • the walls or wall portions 3 9 are formed by pipes 16 which in the plane W of the walls 3 9 (FIGS. and 3) are provided on both sides with fins 17.
  • the fins of adjacent pipes are connected to each other, for instance, by welding, so that a closed surface of fins and alternating pipes is formed.
  • the walls 3 9 are provided with straight walls, which means that the pipes have a plane and no arched or curved surface.
  • the walls or wall portions 3 9 are designed symmetrically with regard to the central axis M (FIGS. 1 and 2). This axis forms the pivot axis, about which the walls or wall portions are turned when the inside has corroded.
  • the oppositely located walls or wall portions as for instance, the wall portions 3 and 4, or 4 and 6 may be exchanged in such a way that the outside of the wall portions 7 takes the place of the inside of the heretofore wall portion 3, and the inside of the wall portion 3 takes the place of the inside of the heretofore wall portion 7.
  • a similar result can be obtained by pivoting the wall portions about their righthand or left-hand edge up to the level of the respective adjacent wall portion.
  • all connecting openings O, for instance, for the pipe groups 10, I1 and entrance hatches E are located symmetrically with regard to the central or pivot axis M and with regard to the wall plane W (FIG. 2).
  • those pipes 16a and 16! which are located at the longitudinal edges of two adjacent pipe wall portions are likewise provided with fins 17a, 17b.
  • These fins are connected to each other at a right angle, for instance, by welding, so that for disengaging the two fins 17a, 17b, and therefore of the respective adjacent walls, it is merely necessary by severing the welding seam at the connecting ing, connecting, supporting, and the like, of the walls or wall portions are located symmetrically with regard to the wall plane W.
  • the pipes 16 of the pipe walls or pipe wall sections 3 8 have their lower ends respectively lead into a distributing pipe 23 and have their upper ends respectively lead into a collecting pipe 24. Both pipes are provided with corresponding connections 25 forming inlet and outlet connections.
  • the pipes 23, 24 and the connections 25 are located in the plane of the boiler walls or wall portions 3 9 and symmetrically with regard to the central axis M of these walls or parts, and have their lower end connected to a conduit 27 by means of a flange 26.
  • the pipes 16 on the inner side of the wall are subjected to a corrosion as a result of which a crosssectional part 21 of the pipes and a cross-sectional part 22 of the webs is eaten away. As a result thereof, the thickness of the pipe wall is reduced to a cross-section Q.
  • the walls 3-8 are at their longitudinal edges severed from the adjacent walls and from the partition 9 or from the framework.
  • the holding and connecting means of the walls are loosened which consist of extensions of the outer fins of the outer pipes of a wall or a wall portion (fins 17a, 17b of FIG. 2) or of extensions or fins on the collecting and distributing chambers.
  • the walls or wall portions are turned about their longitudinal axis M or about the turning axis or are exchanged so that now that pipe side which heretofore faced the interior of the boiler faces outwardly whereas the sections of the pipes which heretofore were located on the outer side of the boiler now face the interior of the boiler. Then the turned walls or wall portions are fixed in their new location.
  • the boiler ceiling is formed by the two pipe surfaces 12, 13 which consist of hairpin pipes 28 (FIGS. 5 to 7).
  • These pipes 28 comprise the straight sections 29, 30
  • a pipe connection 32 which has its central portion divided by a wall 33 into an upper chamber 34 and a lower chamber 35.
  • the ends 29a, 30a of pipes 29, 30 lead into the chambers 34 and 35 to which end there are provided the bores 36, 37 in the connection 32.
  • the chambers 34, 35 are separated from each other by sidewalls 38, 39.
  • the two pipe surfaces l2, 13 are pivotable in a well known manner about the longitudinal axis S of the pipe connection 32 in the direction of the arrow K (FIG. 1) from their horizontal position into an opening position 13' in FIG. 1 so that the boiler can be cleaned, and the pipe groups 10, 11 can be removed from the boiler 2 after the two pipe surfaces 12, 13 have been pivoted.
  • the pipe surfaces l2, 13 are in the same manner as the sidewalls 3-8 and the partition 9 pivotable or tumable about their longitudinal axis L in such a way that the section 30 of the pipes 28 which heretofore faced the interior of the boiler will occupy the position of the pipe section 29, and the pipe section 29 which did not corrode will occupy the position of the pipe section 30.
  • a fin 40 is provided on each pipe between the pipes 30 while the adjacent fins are connected to each other.
  • the fins 40 on the longitudinal side are similar to the fins 42 on the narrow side detachably connected to the adjacent boiler walls or the other pipe surface so that, when undoing these connections, the pipe surfaces 12, 13 can be turned about their longitudinal axis L.
  • a boiler especially a waste heat boiler comprising; a dimensionally stable vertical support frame having an inlet at the bottom and an outlet at the top, planar wall members mounted on said frame and connected along the adjacent edges to form an enclosure supported by said frame, said enclosure being symmetrical about the central vertical axis of said frame, each wall member being formed with liquid flow passages therein.
  • inlet means and outlet means for the flow passages of each wall member, said inlet means and outlet means being symmetrically located in respect of the vertical central plane of the respective wall member, header means for each wall member symmetrically located in respect of the central axis of said frame and of the respective wall member and connected to the inlet means and outlet means of the respective wall member, and connecting means connecting the wall members to said frame and also symmetrically located in respect of the central axis of the respective wall members, whereby each wall member can be reversed about the said central axis thereof for selectively presenting the two sides thereof to the inside of the enclosure formed by said wall members.
  • a boiler according to claim 1 in which the location of the inlet means and outlet means and header means and connecting means is identical for at least some of said wall members for permitting the placement thereof in any of several positions on said frame.
  • each wall member is formed of pipes having fins thereon, the fins of adjacent pipes in a wall member being joined together to form the wall member.
  • a boiler according to claim 3 in which the fins at the adjacent edges of the wall members are joined together to form the enclosure on the frame.
  • a boiler according to claim 5 in which said set of finned pipes and the distributor pipe are symmetric about an axis perpendicular to the axis of the distributor pipe to permit inversion of the set of finned pipes.
  • said set of finned pipes comprise hairpin shaped pipes with the inlets and outlets in spaced relation, said distributor pipe having a longitudinal partition thereon dividing the inside thereof into separate fluid passages, the inlets of said finned pipes being connected to one of said fluid passages and the outlets being connected to the other of said fluid passages.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)
US00363941A 1972-05-27 1973-05-25 Waste heat boiler with boiler walls and wall portions of finned pipes Expired - Lifetime US3814062A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2225971 1972-05-27
DE19732307870 DE2307870C3 (de) 1973-02-17 1973-02-17 Abhitzekessel mit aus Flossenrohren gebildeten Kesselwänden oder -wandteilen

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US3814062A true US3814062A (en) 1974-06-04

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US (1) US3814062A (US07754267-20100713-C00021.png)
GB (1) GB1398475A (US07754267-20100713-C00021.png)
NL (1) NL7307417A (US07754267-20100713-C00021.png)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4325328A (en) * 1979-08-22 1982-04-20 Sulzer Brothers Limited Vapor generator having a pair of combustion chambers
US4395268A (en) * 1980-09-19 1983-07-26 Jaroslav Zabelka Hot gas cooler for a coal gasification plant
US4421065A (en) * 1978-12-06 1983-12-20 Creusot-Loire Heating equipment for an installation using steam and heated gas
US4479536A (en) * 1980-08-26 1984-10-30 Bronswerk K.A.B. B.V. Heat exchanger for a gaseous and a liquid medium
US4546731A (en) * 1983-08-31 1985-10-15 Sulzer Brothers Limited Heat exchanger having a gas flue
US4782768A (en) * 1987-08-24 1988-11-08 Westinghouse Electric Corp. Rotary combustor with efficient air distribution
US4807698A (en) * 1986-05-10 1989-02-28 Krupp-Koppers Gmbh Heat exchanger for gases under high pressure

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2988063A (en) * 1957-12-27 1961-06-13 Vorkauf Heinrich Steam generator
US3375628A (en) * 1965-07-01 1968-04-02 Foster Whceler Corp Insulated wall construction for heated surfaces
US3406664A (en) * 1966-12-29 1968-10-22 Combustion Eng Waste heat boiler
US3453087A (en) * 1964-06-25 1969-07-01 Girdler Corp Modular reformer furnace

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2988063A (en) * 1957-12-27 1961-06-13 Vorkauf Heinrich Steam generator
US3453087A (en) * 1964-06-25 1969-07-01 Girdler Corp Modular reformer furnace
US3375628A (en) * 1965-07-01 1968-04-02 Foster Whceler Corp Insulated wall construction for heated surfaces
US3406664A (en) * 1966-12-29 1968-10-22 Combustion Eng Waste heat boiler

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4421065A (en) * 1978-12-06 1983-12-20 Creusot-Loire Heating equipment for an installation using steam and heated gas
US4325328A (en) * 1979-08-22 1982-04-20 Sulzer Brothers Limited Vapor generator having a pair of combustion chambers
US4479536A (en) * 1980-08-26 1984-10-30 Bronswerk K.A.B. B.V. Heat exchanger for a gaseous and a liquid medium
US4395268A (en) * 1980-09-19 1983-07-26 Jaroslav Zabelka Hot gas cooler for a coal gasification plant
US4546731A (en) * 1983-08-31 1985-10-15 Sulzer Brothers Limited Heat exchanger having a gas flue
US4807698A (en) * 1986-05-10 1989-02-28 Krupp-Koppers Gmbh Heat exchanger for gases under high pressure
US4782768A (en) * 1987-08-24 1988-11-08 Westinghouse Electric Corp. Rotary combustor with efficient air distribution

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NL7307417A (US07754267-20100713-C00021.png) 1973-11-29
GB1398475A (en) 1975-06-25

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