US3804070A - Large flow-through boiler - Google Patents

Large flow-through boiler Download PDF

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Publication number
US3804070A
US3804070A US00286704A US28670472A US3804070A US 3804070 A US3804070 A US 3804070A US 00286704 A US00286704 A US 00286704A US 28670472 A US28670472 A US 28670472A US 3804070 A US3804070 A US 3804070A
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US
United States
Prior art keywords
heating
working medium
flow
tube
partition
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
US00286704A
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English (en)
Inventor
R Michel
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
Original Assignee
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 US3804070A publication Critical patent/US3804070A/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

Definitions

  • a boiler includes a heating wall formed of an assembly of tubes and defines a combustion chamber, a heating partition formed of a tube system subdividing the combustion chamber and connected in parallel with the heating wall tube assembly for conducting liquid working medium, and means for adjusting the rate of flow of the working medium through the heating wall and the heating partition so that the temperature of the working medium at the outlet of the heating partition is maintained considerably below the temperature thereof at the heating wall, the heating wall comprising a heating surface tube section having a downstream end in flow direction of the working fluid, a multiplicity of parallel tube strings greater in number than the heating surfaces of the tube section and having an upstream end and a flow-through collector manifold connected between the downstream end of the heating surface tube section and the upstream end of the parallel tube strings.
  • the invention relates to a large boiler and, more particularly, to a boiler operated with pulverized-coal firing and dry ash removal, such as a so-called oncethrough boiler, wherein the combustion chamber of the boiler is subdivided by at least one partition cooled by working medium.
  • Boilers of this general type have a heating wall formed of heating surface members preferably comprising an assembly of coiledtubes and defining a combustion chamber, a heating partition formed of a tube system subdividing the combustion chamber and connected in parallel with the heating wall tube assembly for conducting liquid working medium, and means for adjusting the flow rate of the working medium through the heating wall and the heating partition so that the working medium is at saturated steam temperature at the outlet of the heating partition tube system and is at a higher temperature in the heating surface members of the heating wall such as at steam temperatures in the range of 400 to 450 C.
  • the invention of the instant application calls for the heating wall to comprise a heating surface tube section having a downstream end in flow direction of the working fluid,'a multiplicity of parallel tube strings greater in number than the heating surfaces of the tube section-and having an upstream end and a flow-through collector manifold connected between the downstream end of the heating surface tube section and the upstream end of the parallel tube strings.
  • downcomer tubes connect the upper end of the heating partition tube system to a flow-through collector manifold for conducting discharging steam thereto, the manifold being connected between the heating surface members of the heating wall at a'location at which a transfer to a multiplicity of parallel tube strings greater in number to the number of heating surface members is effected.
  • a flow-through collector manifold for conducting discharging steam thereto, the manifold being connected between the heating surface members of the heating wall at a'location at which a transfer to a multiplicity of parallel tube strings greater in number to the number of heating surface members is effected.
  • the partition is drawn upwardly through the connection heating surfaces whereas, in twice or more flow-through boilers, the partition is passed through the boiler cover.
  • the invention of the instant application has special significance for boilers wherein the heating surface members of the heating wall defining the combustion chamber have a helical coil construction and are suited especially for a type of construction wherein the helical coil ends at about two-thirds of the height of the combustion chamber and, downstream of a flowthrough collector manifold in flow direction of the working medium, continues upwardly with vertical tubing.
  • FIG. 1 is a diagrammatic view of the boiler of the invention
  • FIG. 2 is an enlarged fragmentary view of FIG. I showing a front elevation thereof;
  • FIG. 3 is a side elevational view of FIG. 2.
  • a feed pump 7 which feeds working medium, such as water through the heating surfaces of an economizer 8, the working medium being divided into two partial flows either upstream or downstream of the economizer heating surfaces.
  • working medium such as water
  • a control or regulating valve 9 the mass flow of working medium to heating surfaces of an outer wall of tubes defining a combustion chamber is adjusted, and through a control or regulating valve 10, the mass flow of the working medium to the heating surfaces of a partition formed of vertical tubes and subdividing the combustion chamber, is adjusted.
  • the valve 9 could generally be dispensed with, in most cases, a throttling action effected with the aid of the valve 10 is necessary.
  • the combustion chamber partition in the illustrated embodiment, is represented by heating surfaces 4, provided with vertical tubes having an inlet distributor manifold 5 and an outlet collec-- tor manifold 6. Analogously, instead of a single combustion chamber partition, several of such partitions can naturally be used.
  • the outer wall heating surfaces are formed, in the illustrated embodiment, by a coiled tube system 51 wherein, for example," adjacent tubes are welded gastightly together.
  • the coiled tube system 51 rising upwardly from an inlet distributor manifold 52 do not extend to the top of the combustion chamber, but end rather at an intermediate flow-through collector manifold 53, from which vertical tube 54 extend upwardly to'an outlet collector manifold-55 at the top of the combustion chamber.
  • FIGS. 2 and 3 which are perpendicular to one another, the disposition of the tubes in the vicinity of the flow-through collector manifold 53 is shown in greater detail.
  • the inclined riser tubes 61 of the coiled tube system are bent vertically upwardly so that short tube lengths 62 extend vertically upwardly.
  • the vertically rising tubes extend downwardly with tube lengths 64 to the flow-through collector manifold 53 and return to the location 63 from which they extend as vertical tubes 66 to the upper outlet collector manifold 55 in the manner of the vertical tube system 54 shown in FIG. 1.
  • a boiler comprising a heating wall formed of an assembly of tubes and defining a combustion chamber, a heating partition formed of a tube system subdividing said combustion chamber and connected in parallel with part of said heating wall tube assembly for conducting liquid working medium, and means for adjust- 4 ing the rate of flow of the working medium through the tubes of said heating wall and said heating partition so that the temperature of the working medium at the outlet of said heating partition is maintained considerably below the temperature thereof at said heating wall, said heating wall comprising a heating surface tube section having a downstream end in flow direction of the working fluid, a multiplicity of parallel tube strings greater in number than the heating surfaces of said tube section and having an upstream end and a flow-through collector manifold connected between said downstream end of said heating surface tube section and said upstream end of said parallel tube strings.
  • a boiler according to claim 1 wherein the working medium is water
  • said means for adjusting the rate of flow of the working medium through said heating wall and said heatingpartition is effective for maintaining the temperature of the working medium at the outlet of said heating wall within the range'of 400 and 450 C and the temperature of the working medium at the outlet of said heating partition at saturated steam temperature.

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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)
  • Control Of Steam Boilers And Waste-Gas Boilers (AREA)
US00286704A 1971-09-07 1972-09-07 Large flow-through boiler Expired - Lifetime US3804070A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2144675A DE2144675C3 (de) 1971-09-07 1971-09-07 Durchlauf-Großdampferzeuger

Publications (1)

Publication Number Publication Date
US3804070A true US3804070A (en) 1974-04-16

Family

ID=5818858

Family Applications (1)

Application Number Title Priority Date Filing Date
US00286704A Expired - Lifetime US3804070A (en) 1971-09-07 1972-09-07 Large flow-through boiler

Country Status (5)

Country Link
US (1) US3804070A (enrdf_load_stackoverflow)
DE (1) DE2144675C3 (enrdf_load_stackoverflow)
FR (1) FR2157797B2 (enrdf_load_stackoverflow)
GB (1) GB1375763A (enrdf_load_stackoverflow)
IT (1) IT1012040B (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4387668A (en) * 1981-12-28 1983-06-14 Combustion Engineering, Inc. Tube arrangement for furnace wall
US20110005471A1 (en) * 2007-09-07 2011-01-13 Mitsubishi Heavy Industries ,Ltd. Moisture separator reheater

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010038885B4 (de) * 2010-08-04 2017-01-19 Siemens Aktiengesellschaft Zwangdurchlaufdampferzeuger
DE102010038883C5 (de) 2010-08-04 2021-05-20 Siemens Energy Global GmbH & Co. KG Zwangdurchlaufdampferzeuger

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3213835A (en) * 1961-07-27 1965-10-26 Combustion Eng Recirculating system having partial bypass around the center wall
US3221713A (en) * 1963-08-20 1965-12-07 Babcock & Wilcox Co Forced flow vapor generator
US3245385A (en) * 1963-08-07 1966-04-12 Babcock & Wilcox Co Forced flow vapor generating unit

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2797667A (en) * 1953-12-03 1957-07-02 Combustion Eng Controlled circulation boiler with novel dual furnace
NL129291C (enrdf_load_stackoverflow) * 1961-07-27

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3213835A (en) * 1961-07-27 1965-10-26 Combustion Eng Recirculating system having partial bypass around the center wall
US3245385A (en) * 1963-08-07 1966-04-12 Babcock & Wilcox Co Forced flow vapor generating unit
US3221713A (en) * 1963-08-20 1965-12-07 Babcock & Wilcox Co Forced flow vapor generator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4387668A (en) * 1981-12-28 1983-06-14 Combustion Engineering, Inc. Tube arrangement for furnace wall
US20110005471A1 (en) * 2007-09-07 2011-01-13 Mitsubishi Heavy Industries ,Ltd. Moisture separator reheater

Also Published As

Publication number Publication date
GB1375763A (enrdf_load_stackoverflow) 1974-11-27
FR2157797B2 (enrdf_load_stackoverflow) 1979-09-21
DE2144675A1 (de) 1973-03-15
DE2144675B2 (de) 1980-10-09
DE2144675C3 (de) 1981-05-27
FR2157797A2 (enrdf_load_stackoverflow) 1973-06-08
IT1012040B (it) 1977-03-10

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