US3310040A - Once-through boiler with welded tube system - Google Patents

Once-through boiler with welded tube system Download PDF

Info

Publication number
US3310040A
US3310040A US442605A US44260565A US3310040A US 3310040 A US3310040 A US 3310040A US 442605 A US442605 A US 442605A US 44260565 A US44260565 A US 44260565A US 3310040 A US3310040 A US 3310040A
Authority
US
United States
Prior art keywords
tubes
evaporator
combustion chamber
welded
supports
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
US442605A
Other languages
English (en)
Inventor
Michel Rupprecht
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
Original Assignee
Siemens Corp
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 Siemens Corp filed Critical Siemens Corp
Application granted granted Critical
Publication of US3310040A publication Critical patent/US3310040A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F22B37/62—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
    • 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
    • F22B1/22—Methods of steam generation characterised by form of heating method using combustion under pressure substantially exceeding atmospheric pressure
    • 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
    • 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
    • F22B37/142—Supply mains, e.g. rising mains, down-comers, in connection with water tubes involving horizontally-or helically-disposed water tubes, e.g. walls built-up from horizontal or helical tubes

Definitions

  • This invention relates to boilers of the once-through type as disclosed in the co-pending application of Rupprecht Michel, Ser. No. 234,484, filed Oct. 3l, 1962, for Pressure-Fired Once-Through Boiler, and more particularly to a once-through boiler having superpressure ring, in which the tubes of the evaporator in the lower fire chamber region are wound about the combustion chamber in constant or progressive slope and welded together to form a thick wall.
  • This welded tube system is suitably suspended on vertical flat bars disposed directly therebehind.
  • the present invention starts from this principle of the suspended boiler and has its concept residing in that the vertical evaporator outlet tubes in a once-throughboiler are preferably welded together and combined in groups; and that these welded together tube groups are arranged in such a way that they thermally protect carrying brackets for the tube strips of the evaporator wound about the ring chamber.
  • the flat plates carrying the welded together evaporator tube system are protected in the upper region of the radiation superheater by the here vertically rising and welded together evaporator outlet tubes against undesirable thermal radiation.
  • the U- shaped tubes are suitably welded together into strips of two to three m. in width.
  • the expansion joints between these bands should in each case be at the points where the evaporator tubes are led up vertically so that there is present an overlap for prevention of re chamber radiation.
  • the sealing of the independently suspended heating surfaces of the evaporator system opposite the radiation superheater takes place, for instance, through a horizontal diaphragm running about the entire firing chamber.
  • the vertical separation joints in the region of the radiation superheater are then packed by means of vertical diaphragms.
  • the boiler may have its tubes for its horizontal pass and the second pass constructed of welded together tube walls inserted between the evaporator and the radiation superheater in the working medium ow.
  • the sealing of the fire chamber roof may be effected in a conventional manner, for instance through a plate cover and packing insulation for the thrust-through superheater heating surfaces, with an air chamber laid over the entire fire charnber, the air chamber being kept at a suitable excess pressure with respect to the firing chamber pressure.
  • the concepts of the present invention features an evaporator system for a once-through superpresure-fired steam boiler having a combustion chamber.
  • the evaporator system includes a plurality of evaporator tubes upwardly sloping at a slight incline and extending around said combustion chamber.
  • Vertically extending supports are disposed in spaced relationship to the combustion chamber, and a plurality of strips are disposed between and welded to adjacent of said tubes so that the tubes and the strips form a tube wall.
  • Brackets are secured to the supports and welded to the strips for supporting said tube wall on the supports with the evaporator tubes terminating in vertically extending outlet tubes, disposed between said chamber and said supports.
  • the superheater is also similarly constructed, independently suspended and disposed between the combustion chamber and the evaporator tubes.
  • Still further objects and features of this invention reside in the provision of an evaporator system for a once-through superpressure-fired steam boiler that is extremely safe and self protective and which is substantially trouble free.
  • FIG. 1 is a vertical sectional view illustrating the evaporator system constructed in accordance with the concepts of the present invention.
  • FIG. 2 is a horizontal sectional view through the boiler illustrating the evaporation section in detail.
  • FIG. 1 shows a vertical section in the region of about two thirds of the height of the combustion chamber of the boiler where the evaporator tubes 3 winding about the combustion chamber at first still rising at a slight incline there, double back and then terminate in evaporator outlet tubes 3a which rise vertically up to the combustion chamber ceiling.
  • the radiation superheater 4 is independently suspended and extends substantially the full height of the evaporator.
  • the combustion chamber is located to the right of the representation of FIG. 1.
  • the still slightly inclined or substantially horizontally disposed evaporator tubes 3 are formed of cast iron and they are welded together into a tight tube wall by means of suitable strips 13.
  • the strips 13 are alternately disposed between and welded to adjacent tubes 3.
  • This tube wall is suspended from above on the iboiler frame structure by means of carrier supports 2 which may be in the forrn of plates.
  • Suitable brackets 8 are provided at intervals of about 10 to 15 cm. by means of which the tube wall made up of the evaporator tubes 3 is welded to the supports 2.
  • the brackets are secured to the supports 2 and then welded, as at 14, to the strips 13.
  • the evaporator outlet tubes 3a are welded together into separate groups so that they thermally protect the supports 2 against the heat radiating from the combustion chamber located to the left in FIG. 2.
  • the evaporator outlet tubes 3a form a vertically extending wall through the use of strips 15 which are welded to adjacent tubes 3a.
  • the tubes of the radiation superheater 4 are U-shaped and are suspended independently of the evaporator system.
  • the tubes may likewise be formed of cast iron or other suitable material and are welded together into tight wall sections with band-shaped intermediate straps 17.
  • the parting line 9 between the two wall sections 10 and 11 of the radiation superheater 4 lies parallel to the suspension structure 2 for the evaporator tubes 3.
  • the tube Walls and 11 of the radiation superheater 4 may for example have a width of two to three meters.
  • the vertical spaces between these walls 10 and 11 are covered and closed by a diaphragm sheeting 6 to make the superheater gastight.
  • the differential expansion of the radiation superheater heating surface in the upper part of the combustion chamber with respect to the evaporator heating surfaces is taken up by a diaphragm system surrounding the entire combustion chamber. While in the region of the evaporator horizontal supports or wrappings are not required in the hot areas, such horizontal suppotrs 5 in the form of double T-irons a-re provided in the region of the radiation superheater 4 on account of the vertical separating spaces.
  • T-irons may be welded at the corners or" the combustion chamber. At all points where the vertical through-beam construction of the evaporator system extends, these supports are shown in cutaway section. At 7, are designated the cold, outlying supports which are necessary in the region of the evaporator as well as of the radiation superheater.
  • a once-through superpressure-red steam boiler comprising a combustion chamber, an evaporator system including a plurality of evaporator tubes upwardly sloping at a slight incline and extending around said combustion chamber, vertically extending supports disposed in spaced relationship to said combustion chamber, a plurality of strips disposed between and welded to adjacent of said tubes so that said tubes and said strips form a tube wall, lbrackets secured to said supports and welded to said strips for supporting said tube wall on said supports, said evaporator tubes terminating in vertically extending outlet tubes, said outlet tubes being disposed ⁇ between said chamber and said supports, a superheater disposed between said combustion chamber and said evaporator tubes and independently suspended from said evaporator system, said superheater including a plurality o U-shaped tubes, a plurality of strips welded to and spaced adjacent of said U-shaped tubes to form superheater wall sections spaced from one another in a common plane, the spaces between said superheater wall sections lying in
  • a -boiler according to claim 1 including a horizontally extending diaphragm disposed about the entire combustion chamber and welded to said vertical diaphragm sheeting adjacent said superheater.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Combustion Of Fluid Fuel (AREA)
  • Paper (AREA)
US442605A 1964-03-26 1965-03-25 Once-through boiler with welded tube system Expired - Lifetime US3310040A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES0090244 1964-03-26

Publications (1)

Publication Number Publication Date
US3310040A true US3310040A (en) 1967-03-21

Family

ID=7515671

Family Applications (1)

Application Number Title Priority Date Filing Date
US442605A Expired - Lifetime US3310040A (en) 1964-03-26 1965-03-25 Once-through boiler with welded tube system

Country Status (5)

Country Link
US (1) US3310040A (en:Method)
AT (1) AT258967B (en:Method)
DE (1) DE1426720A1 (en:Method)
GB (1) GB1063762A (en:Method)
NL (2) NL6414887A (en:Method)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3407788A (en) * 1966-10-05 1968-10-29 Sulzer Ag Expansible linkage for a steam generator

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2948267A (en) * 1955-05-10 1960-08-09 Babcock & Wilcox Co Steam generating unit having a superheater and reheater each including a radiant section and a convection section
US2987052A (en) * 1958-09-29 1961-06-06 Comb Engineers Inc Wall construction for pressurized furnace
GB870735A (en) * 1958-08-01 1961-06-21 Babcock & Wilcox Ltd Improvements in tubulous boilers
US3034485A (en) * 1958-10-17 1962-05-15 Babcock & Wilcox Ltd Tubular wall construction

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2948267A (en) * 1955-05-10 1960-08-09 Babcock & Wilcox Co Steam generating unit having a superheater and reheater each including a radiant section and a convection section
GB870735A (en) * 1958-08-01 1961-06-21 Babcock & Wilcox Ltd Improvements in tubulous boilers
US2987052A (en) * 1958-09-29 1961-06-06 Comb Engineers Inc Wall construction for pressurized furnace
US3034485A (en) * 1958-10-17 1962-05-15 Babcock & Wilcox Ltd Tubular wall construction

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3407788A (en) * 1966-10-05 1968-10-29 Sulzer Ag Expansible linkage for a steam generator

Also Published As

Publication number Publication date
GB1063762A (en) 1967-03-30
NL6414887A (en:Method) 1965-09-27
DE1426720A1 (de) 1969-10-23
NL134695C (en:Method)
AT258967B (de) 1967-12-27

Similar Documents

Publication Publication Date Title
US3267913A (en) Apparatus and method for supporting tubes
US2987052A (en) Wall construction for pressurized furnace
US4510892A (en) Seal for boiler water wall
US3298360A (en) Pressure-fired once-through boiler
US3310040A (en) Once-through boiler with welded tube system
US4294200A (en) Variable pressure vapor generator utilizing crossover circuitry for the furnace boundary wall fluid flow tubes
ES2179696T3 (es) Generador de vapor continuo calentado por combustible fosil.
US4782793A (en) Fossil-fuel fired vapor generator
US3208436A (en) Furnace wall support and expansion apparatus
US2134000A (en) Wall construction
US3358650A (en) Water cooled furnace joint for mixing header arrangement
RU2096679C1 (ru) Вертикальный двухбарабанный котел
US1782096A (en) Superheater boiler
US3212481A (en) Integral box construction for steam generators
US2354222A (en) Fluid heat exchange installation
US3392710A (en) Combined combustor screen and gas flow distributor
EP0044132B1 (en) Boiler comprising a furnace box
US2207497A (en) Fluid heat exchange apparatus
US2292354A (en) Vapor generator
US3261328A (en) Boiler construction
US3181508A (en) Industrial furnaces
US2630104A (en) Steam generator
US3153402A (en) Steam generator
US3612006A (en) Expansion seal
US3476090A (en) Steam generating unit