US3135243A - Furnace wall arrangement - Google Patents

Furnace wall arrangement Download PDF

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Publication number
US3135243A
US3135243A US127396A US12739661A US3135243A US 3135243 A US3135243 A US 3135243A US 127396 A US127396 A US 127396A US 12739661 A US12739661 A US 12739661A US 3135243 A US3135243 A US 3135243A
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United States
Prior art keywords
tubes
furnace
wall
flow
walls
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Expired - Lifetime
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US127396A
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English (en)
Inventor
Willburt W Schroedter
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Combustion Engineering Inc
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Combustion Engineering Inc
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
Priority to DENDAT1255669D priority Critical patent/DE1255669B/de
Priority to NL129291D priority patent/NL129291C/xx
Priority to BE620763D priority patent/BE620763A/xx
Priority to NL281273D priority patent/NL281273A/xx
Priority to US127396A priority patent/US3135243A/en
Application filed by Combustion Engineering Inc filed Critical Combustion Engineering Inc
Priority to US127331A priority patent/US3135251A/en
Priority to CH861162A priority patent/CH402000A/de
Priority to FR904814A priority patent/FR1334588A/fr
Priority to ES0279532A priority patent/ES279532A1/es
Priority to GB29053/62A priority patent/GB1008768A/en
Priority to SE8315/62A priority patent/SE303137B/xx
Application granted granted Critical
Publication of US3135243A publication Critical patent/US3135243A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F22B37/10—Water tubes; Accessories therefor
    • F22B37/14—Supply mains, e.g. rising mains, down-comers, in connection with water tubes
    • F22B37/141—Supply mains, e.g. rising mains, down-comers, in connection with water tubes involving vertically-disposed water tubes, e.g. walls built-up from vertical tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B29/00—Steam boilers of forced-flow type
    • F22B29/02—Steam boilers of forced-flow type of forced-circulation type
    • F22B29/023—Steam boilers of forced-flow type of forced-circulation type without drums, i.e. without hot water storage in the boiler
    • F22B29/026—Steam boilers of forced-flow type of forced-circulation type without drums, i.e. without hot water storage in the boiler operating at critical or supercritical pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B29/00—Steam boilers of forced-flow type
    • F22B29/06—Steam boilers of forced-flow type of once-through type, i.e. built-up from tubes receiving water at one end and delivering superheated steam at the other end of the tubes
    • F22B29/061—Construction of tube walls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B29/00—Steam boilers of forced-flow type
    • F22B29/06—Steam boilers of forced-flow type of once-through type, i.e. built-up from tubes receiving water at one end and delivering superheated steam at the other end of the tubes
    • F22B29/067—Steam boilers of forced-flow type of once-through type, i.e. built-up from tubes receiving water at one end and delivering superheated steam at the other end of the tubes operating at critical or supercritical pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B3/00—Other methods of steam generation; Steam boilers not provided for in other groups of this subclass
    • F22B3/04—Other methods of steam generation; Steam boilers not provided for in other groups of this subclass by drop in pressure of high-pressure hot water within pressure- reducing chambers, e.g. in accumulators
    • 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

Definitions

  • This invention relates generally to the art of vapor gen# eration and is particularly concerned with an improved vapor generator organization for operation at supercritical critical pressures and temperatures are such that natural circulation and separation of liquid and vapor as recognized in subcritical operation are either not possible or not satisfactory so Vthat supercritical vapor generators are of the forced once-through llow type wherein the feed pump forces the working medium through a continuous circuit from the inlet of the Vapor generator to its outlet with the feed being regulated in accordance with the output of the unit and with the working medium being heated to its desired temperature during passage through the unit, this medium being delivered at Athis desired temperature and the desired pressure to the point of use, as for example a turbine.
  • the tubes that line the furnace wall are of particular concern with regard to overheating because of the high heat absorption rate of these tubes even at low load. Accordingly, various arrangements have been employed for lining the furnace Walls with tubes as for example, a
  • the temperature diiferental between inlet and outlet of the tubes of the panels also will increase as the load decreases. This is so, because, as previously mentioned, the ratio of furnace absorption to over-al1 absorption of the unit is at its peak at low load operation and the temperature of the water entering the panels is low. Thus the temperature differentials in the panels change with changing load causing cyclic development of stresses within the tube panels which present the danger of ultimate fatigue failure of the welded wall.
  • the present invention provides a once-through ow supercritical vapor generator having welded panel wall type construction and wherein the design of the tubular panel walls is not limited by requirements of the throughflow system and also wherein the stresses in these panel walls resulting from differential temperatures are maintained at a minimum.
  • This supplemental flow also reduces the possibility of unbalance of fluid temperature in the tubes across the panel and accordingly unbalance of the tube metal temperatures. This is so whether this unbalance iiuid temperature is caused by flow variation due to tube geometry or by uneven heat absorption.
  • the tube size may be selected for the one best 'suited for the requirements of the service. It will be suiciently large to avoid any substantial effect or influence by mill tolerance and deposits on pressure flow and temperature.
  • the tube wall thickness can be selected on the basis of pressure and temperature considerationsl only.
  • the wall thickness of uniform outside diameter tubes may have to be increased, beyond that necessary for the temperature and pressure considera- ,tions in order to reduce the inside diameter and provide an area which will give the necessary iiow velocity through a critical portion ofthe tube.
  • the circulating system of vthe invention permits the panel geometry, i.e. the relationship of outside diameter, wall thickness, spacing, 1in placement and size, to be selected so as to provide improved panel exibility as well as a surface pattern best suited to the furnace operation.
  • This series-How relation of the panels has the effect of providing a de,-
  • a further object of the invention is to provide an improved once-through ow vapor generator operating at supercritical pressures and provided with tubular panel wall type construction in which the stresses within the panel walls are maintained at a relatively low value.
  • a still further object of the invention is to provide a once-through ilow vapor generator operating at supercritical pressures and having tubular panel wall type construction with ilexibility in the design of the panel walls being permitted and with this design not being restricted by requirements of the through-flow portion of the system.
  • Y Still another object of the invention is to provide a once-through flow vapor generator operating at supercritical pressures and provided with a panel wall construction including a center partition wall and wherein the temperature differential between inlet and outlet of the furnace walls and the partition walls is maintained at a relatively low value.
  • Another object of the invention is to provide a oncethrough ilow vapor generator operating at supercritical pressures and provided with panel wall construction wherein the flow through the panel walls is not limited to that of the throughiiow but may be supplemented particularly as the load is decreased in order that stresses within the tubes resulting from differential temperatures may be maintained at a minimum and in order that the design of the panels may be the optimum.
  • FIGURE 1 is a vertical sectional View of a once-through ilow supercritical vapor generator embodying the present invention with this view being somewhat diagrammatic in nature; Y
  • FIGURE 2 is also a vertical sectional view somewhat diagrammatic in nature with this View being taken generally along line 2--2 of FIG. l;
  • FIGURE 3 is a transverse section taken generally along line 3 3 of FIG. 1; Y
  • FIGURE 4 is a skeletonized perspective View of the vapor generator of FIG. 1 showing how the various walls of the furnace are interconnected with the through-flow system and with the superimposed circulating system;
  • FIGURE 5 is a fragmentary sectional View through one of the side walls of the vapor generator
  • FIGURE 6 is a sectional view of one of the side walls of the vapor generator with this section being taken generally along line 6 6 of FIG. 1;
  • FIGURE 7 is an elevational view of a portion of one of the side Walls with this view being taken generally along line 77 of FIG. 6 and with this view showing how the spacing of the tubes is increased in order to provide tubular wall coverage for the lateral gas pass extending from the furnace outlet.
  • the once-through tlow supercritical unit shown therein includes furnace 10 which is vertically disposed and has an outlet for combustion gases at its upper end and provided in its rear wall. Extending from this outlet is the lateral gas pass 12 which connects with the upper end of the vertically extending gas pass 14 that extends downwardly in parallel relation with the furnace. Combustion gases pass up through furnace 10, through the outlet and then through gas passes 12 and 14 with the gases being conveyed from this latter gas pass to a stack and traversing, as is conventional, a suitable air heateror other heat exchange equipment.
  • furnace is iired by means of tangentially arranged burners16 which are disposed to provide a whirling gas mass in the two furnace compartments 18 and 20, FIG. 3.
  • tangential type of firing has been illustratively disclosed in the drawings other well known types of firing may be employed with the inventive organization as for example either the horizontal or vertical cyclone type firing may be used where crushed coal is burned in cyclone chambers or front-wall or opposed-wall firing may be employed.
  • the so-called turbo ring may also be utilized wherein burners, horizontally arranged on opposite walls, are directed downwardly toward the furnace bottom. Regardless of the type of firing employed hot combustion gases are generated in the lower region of the furnace 10 and pass upwardly therethrough and out the outlet at the upper portion of the furnace.
  • the furnace is made up of front wall 22, rear wall 2d, and side walls 26. Centrally disposed between side walls 26 is partition wall 28 which extends between but termi nates, at least throughout a major portion of its length, in spaced relation with front and rear walls 22 and 24- with the'partition wall 28 dividing the furnace into the aforementioned compartments 18 and 26 which extend vertically throughout the heighth of the furnace.
  • the once-through flow system of the vapor ⁇ generator is comprised of a number of heat exchange portions or sections which are connected in series flow relation and through which the through-flow is forced by means of the feed pump.
  • thesey heat exchange sections may be identified as the economizer, the wall tube heating sections and the heating sections comprising tubular members extending down into the gas passageways and the furnace.
  • Feed pump 30 forces the working medium through the economizer 32 which is comprised of numerous tubular elements in parallel flow relation and positioned generally at the lower end of gas pass 14. From economizer 32 the throughflow is conveyed through conduit 34 to mixing vessel 36 and from this mixing vessel the iiuid flows down through conduit 38 to the inlet header 40 positioned at the bottom of center wall or partition wall 28.
  • This partition wall 28 is comprised of vertically extending side-by-side tubular members 29 which are connected at their lower end with the header 40 and at their upper end with header 42. Alternate tubes of the center wall are bent at the lower end of the wall in order to form one side of the hopper bottom for each of the furnace compartments. Each adjacent tube in the center with is in elfect a separate tube that extends only lonce throughout the length of the center wall being connected at its upper and lower ends to the outlet and inlet headers of the wall respectively. The working medium ilows up simultaneously through all of the tubes of the center wall from header 4t) to header 42 in parallel flow relationship through the various tubes. V
  • the working medium is conveyed by downcomers 44 to the inletheader means designated generally 46 from which the iluid is distributed to the tubes which line the furnace'walls.
  • This ⁇ header means includes the headers 48 to which are connected the lower ends of tubes 50 that are disposed in side-by-siderelation and extend vertically up along the side walls 26 connecting at their upper end with outlet headers 52.
  • the header arrangement 46 also includes header 54 to ⁇ which the lower end of tubes 56 are connected with these tubes being in side-by-side relation and extending vertically up along front wall 22 being bent at their upper region to extend along the roof of the furnace and then conneet with outlet header 58.
  • header 60 is header 60 to which the lower ends of tubes 62 are connected with these tubes being disposed in ⁇ sidebyside relation and extending up along the rear wall 24 of the'furnace with some of these tubes 62 being bent to extend along and conform. with nose baille 64 while others continue their vertical extension across the back of theV nose baille with the tubes 24 extending'across gas pass 12 and connecting at their upper end with outlet header 58.
  • the headers 52 are interconnected with header 58 so that the eluent from the wall tubes is all received inthe distribution header 66 which is connected with header 58 via a number of connecting conduits 63.
  • the through llow ⁇ is conveyed to and through the group of sinuously bent tubes 7i) which are supplied from the distribution header 66 via conduit 72 header 76 and headers 71, FIG. l.
  • the discharge from the tube group 70 is received in header 74 which is in turn connected with header 78.
  • header 74 Connected with this latter header is the inlet of the tubes which make up the panel type heat exchange portion that extends down into the upper end of the furnace and is comprised of a plurality of panels disposed in side-by-side relation across the furnace. In traversing the panel heat exchange portion S0 the fluid is heated to its desired temperature and is at its desired supercritical pressure and accordingly is delivered to the turbine 82.
  • the unit is provided with a reheater 84 disposed in gas pass 12 and which is connected with the turbine S2 in the usual manner to reheat the vapor after it has given up a portion of its energy.
  • the exhaust from the turbine 82 is received in condenser 83 where the vapor is condensed and this condensate is pumped by pump 85 through feedwater heaters 87 and daerator S9 to the inletof feed pump 30.
  • Each of the side-by-side tubes that line the inner surface of the furnace walls 22, 24 and 26 are in effect separate tubes which extend between the inlet and outlet headers of the respective walls with each adjacent tube being in parallel flow relation so that all of the tubes lining the furnace walls are in parallel ilow relation with the through-flow passing upwardly through these parallel ilow paths.
  • Adjacent tubes on each wall are welded together throughout the length of the wall with the juncture of the tubes being shown in FIG. 5.
  • tubes 50 are joined together throughout the length of the wall by providing spacer 86 between each adjacent pair of tubes and welding this spacer to the tubes throughout the wall length.
  • the center wall is also preferably of welded construction in order to provide greater strength and in orderV to provide a surface to which slag is much less likely to adhere.
  • the center wall throughout a major portion of its length terminates in spaced relation with the front and rear walls of the furnace in order to provide a suitable opening or passage between the compartments 1S and 20 for pres.- sure equalization and other purposes.
  • a circulating system superimposed on the throughow system for recirculating a portion of the Working fluid through the tubes that make up these wall portions.
  • This circulating system includes conduit 88 which is connected with distribution header 66 that receives the working medium egressing from the tubes extending up along the furnace walls.
  • This conduit 88 is connected with pump 90 which has its outlet connected with mixing vessel 36.
  • the unit may be designed so that in its upper load range no recirculation is necessary since in this range the through-flow is sufficiently great to provide ample velocity through the center wall and furnace wall tubes without encountering the objections hereinbefore mentioned.
  • the circulating system is effective to circulate the working medium or a portion of the working medium through y these portions of the through-flow system.
  • the circulating pump 9 may be a constant speed pump and may be so designed that at 70 percent load it become effective to initiate circulation through the center partition wall and the furnace wall tubes. As the load on the unit decreases this constant speed pump will be effective to maintain the velocity through the center partition wall and furnace wall tubes adequate to insure against tube failure and of course as the load decreases the pump will be effective to circulate a greater proportion of the total flow through the center partition and furnace wall tubes.
  • a check valve 92 to prevent reverse flow through the pump and conduit 88.
  • Center partition wall 28 and the furnace walls are connected in series flow relation in order to decrease the differential temperature between the inlet and the outlet of the tubes making up these wall portions. Whether these wall portions are connected in parallel or in series ow relation the amount of heat that must be absorbed by the fluid owing through them would have to be the same, since this would be a requirement in order to meet the load imposed upon the vapor generator. It is accordingly apparent that the difference in temperature in the working medium entering and leaving these wall portions Will be substantially less if they are connected in series than if they are connected in parallel.
  • the total flow area of the tubes 29 of the center wall is substantially less than the total combined ilow area of the outer furnace wall tubes 50, 56 and 62. This is necessary in order that the center wall tubes may be maintained an acceptable size and not become inordinately large.
  • the center wall tubes may be 2" O.D. and the furnace wall tubes 11/2" O.D.
  • lt is the superimposing of the circulating system on the once-through flow system of the supercritical vapor generator and in particular on the welded panel wall portion of the once-through flow system whichl permits the use of this panel construction while maintaining relatively low stresses due to temperature differences transversely of the panel walls and particularly the cyclic stresses caused by temperature changes resulting from change in load and which are otherwise of substantial magnitude particularly at low loads and start up.
  • the temperature dierential between the inlet and thc outlet of the tubes of the panels is greatly decreased giving much greater stability. This is so because the portion of the medium that is recirculated is substantially higher in temperature than the through-flow medium that enters the tubular panels.
  • hanger rods 93 may be provided which extend down from structural steel members, as shown (FIG. 1), and are connected with some of the tubes on each wall.
  • the welded tubular panel wall type of construction greatly simplifies support of the unit and construction of the furnace walls permitting a known and proven outer wall design, including buckstays and their supports to be employed.
  • a once-through ow vapor generator designed to operate at supercritical pressures and which is provided with a novel organization which enables the tubular panel wall type construction to be employed while providing for freedom of design with regard to the tubular panels and maintaining the stresses developed within the panels during operation at a minimum, and further by arranging the center wall in series with outside furnace walls, the temperature gradients are approximately halved and the stress and fatigue possibilities greatly reduced.
  • the center Wall ow It is to be understood that the invention is not limited to the specific embodimentherein illustrated and described, but may be used in other Ways without departure from its spirit, and that various changes can be made which would come within the scope of the invention which is limited only by the appended claims.
  • a vapor generator of the once-through flow type for operation at supercritical pressure and having a throughflow system through which the working medium is forced said generator including a furnace defined by elongated wall members that are lined with separate tubes in sideby-side relation across said members and extending longitudinally thereof to absorb heatfrom Within the furnace and which is produced as a result of the burning of a fuel, these tubes being in parallel flow relation with respect to the working medium and forming part of the through-flow system of the generator, the tubes being integrally bonded together generally throughout the length of their respective Walls, a partition Wall disposed Within and extending longitudinally of the furnace, said partition wall being comprised of separate longitudinally extending tubes in side-by-side relation across the Wall and in parallel ow relation, said partition wall tubes also forming part of the through-flow system of the generator, but being in series lio-W relation with the furnace wall tubes with the total ow area of the partition wall tubes being substantially less than that of the furnace Wall tubes in parallel flow relation, and means for increasing the flow of the working medium through
  • a vapor generator of the once-through ow type for operation at supercritical pressure and having a through-How system through which the Working medium is forced said generator including a vertically disposed furnace, means for firing a fuel and generating combustion gases that pass through the furnace with the furnace lbeing provided with an outlet remote from this last mentioned means, said furnace being defined by vertically elongated wall members which are lined with separate, generally vertically extending tubes in side-by-side relation across the width of each wall member, said tubes being in parallel flow relation and with adjacent tubes on each wall being bonded together generally throughout the height of the Wall, forming part of said through-flow system, a vertically disposed partition Wall effectively partitioning the furnace and comprised of separate, vertical tubes in side-by-side relation across the width thereof,
  • said partition wall forming part of said through-How system with the tubes of the partition wall being in parallel ow relationl relative to each other but in series fiow relation with the furnace wall tubes, said furnace wal-1 tubes and partition wall tubes being connected into the throughow system so that the through-flow is upwardly therethrough, and a circulating system superimposed on the through-flow system in parallel relation with the partition wall and the furnace Wall tubes and effective to recirculate working medium through these portions of the through-flow system in supplement to the through-flow.
  • a vapor generator of the once-through How type for operation at supercritical pressure and having a through-how system through which the working medium is forced said generator including a vertically disposed furnace, means for ring a fuel and generating combustion gases that pass through the furnace with the furnace being provided with an outlet remote from this last men ⁇ tioned means, said furnace being defined by vertically elongated wall members which are lined With separate,
  • a forced through-flow circuit through which the working medium is conveyed, a furnace having parallel flow tubes on its walls forming part of the' through-flow system, and a furnace partition wall comprised of parallel flow tubes also forming part of the through-flow systern, in series with and upstream of said furnace Wall tubesV relative to flow of the working medium through the through-flow circuit.
  • a forced through-flow supercritical vapor generator including a tubular forced through-flow circuit through which the Working medium is conveyed, a furnace having its Walls lined with parallel flow tubes, a furnace partition wall comprised of parallel ow tubes and effectively compartmenting the furnace, the total flow area of the partition Wall tubes being substantially less than that of the furnace wall tubes in parallel flow relation, said partition wall tubes and said furnace Wall tubes forming part of the through-How system with the partition Wall tubes being upstream of the furnace wall tubes.
  • a forced through-flow supercritical vapor generator including a tubular forced through-now circuit through which the working medium is conveyed, a vertically disposed furnace having its walls lined with vertically extending tubes in side-by-side relation throughout the wall perimeter and in parallel flow relation, a vertically disposed partion wall in said furnace comprised of vertical, side-by-side tubes also in parallel flow relation and having a total flow area substantially less than that of said parallel ow Wall tubes, these partition wall and furnace wall tubes forming part of the through-flow system, said system including means to direct the through-flow up through the center wall tubes and thereafter up through the furnace wall tubes.
  • a forced through-flow supercritical vapor generator including a tubular forced through-flow circuit through which the working medium is conveyed, an
  • elongated furnace defined by wall members which are ⁇ of longitudinally extending tubes in parallel iiow relation and forming part of the through-flow system, said partition wall tubes. being in series flow relation with the furnace Wall tubes and upstream thereof with relation to flow of the Working medium, and a circulating system l 1 superimposed on the through-how system and operative toV circulate the working medium through the partition wall and furnace wall portions of said system.
  • a forced through-flow supercritical vapor generator including a tubular forced through-How circuit through which the working medium Vis conveyed, said generator including a vertically disposed furnace, means for firing a fuel and generating combustion gases that ow through the furnace from the lower regi'on upward with the furnace having a lateral outlet at its upper region, gas passageway means extending from said outlet including a portion extending down alongside said furnace being dencd by vertically elongated wall members which arel lined with separate, generally vertically'extending tubes in side-by-side relation across the width of each wall member, said tubes being in parallel flow relation relative to the working medium yand connected into said through- ⁇ ow system so the through-flow of working medium is upwardly therethrough with adjacent tubes on each wall being bonded together throughout the height of the wall, means for supporting said tubular walls from above for expansion downward, ⁇ a partition wall within said furnace and extending vertically thereof, ⁇ said partition wall being comprised of side-by-side vertically extending tubes in parallel ow relation with the flow area of the partition wall
  • a forced through-flow circuit through which the working medium is conveyed, a furnace having parallel flow tubes on its walls forming part of the through-flow system, and a furnace partition wall comprised of parallel flow tubes also forming party of the through-flow system, in series with and upstream of said furnace wall tubes relative to the ow of the working medium through the through-flow circuit, said furnace wall tubes being bonded together throughout the extent of the furnace and means operative to provide a flow through said furnace wall tubes greater than the through-flow.
  • a forced through-flow circuit through which the working medium is conveyed, a furnace having parallel flow tubes on its walls forming part of the through-flow system,'and a furnace partition wall comprised of parallel flow tubes with the total How area of the partition wall tubes being substantially less than that of the furnace wall tubes in parallel ow relation, said partition wall tubes also forming part of the through-how system and connected in series flow relation with, and upstream of the furnace wall tubes, said furnace wall tubes bonded together throughout the extent of the furnace and means operative to provide a flow through said furnace wall tubes greater than the through-flow.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)
US127396A 1961-07-27 1961-07-27 Furnace wall arrangement Expired - Lifetime US3135243A (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
DENDAT1255669D DE1255669B (de) 1961-07-27 Zwangdurch laufdampferzeuger
NL129291D NL129291C (zh) 1961-07-27
BE620763D BE620763A (zh) 1961-07-27
NL281273D NL281273A (zh) 1961-07-27
US127331A US3135251A (en) 1961-07-27 1961-07-27 Circuit for vapor generator
US127396A US3135243A (en) 1961-07-27 1961-07-27 Furnace wall arrangement
CH861162A CH402000A (de) 1961-07-27 1962-07-19 Zwanglaufdampferzeuger
FR904814A FR1334588A (fr) 1961-07-27 1962-07-23 Générateur de vapeur fonctionnant à une pression hypercritique
ES0279532A ES279532A1 (es) 1961-07-27 1962-07-26 Generador de vapor especialmente de paso forzado, accionado a presiën supercritica
GB29053/62A GB1008768A (en) 1961-07-27 1962-07-27 Forced-flow vapour generators
SE8315/62A SE303137B (zh) 1961-07-27 1962-07-27

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US127331A US3135251A (en) 1961-07-27 1961-07-27 Circuit for vapor generator
US127396A US3135243A (en) 1961-07-27 1961-07-27 Furnace wall arrangement

Publications (1)

Publication Number Publication Date
US3135243A true US3135243A (en) 1964-06-02

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US127331A Expired - Lifetime US3135251A (en) 1961-07-27 1961-07-27 Circuit for vapor generator
US127396A Expired - Lifetime US3135243A (en) 1961-07-27 1961-07-27 Furnace wall arrangement

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US127331A Expired - Lifetime US3135251A (en) 1961-07-27 1961-07-27 Circuit for vapor generator

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US (2) US3135251A (zh)
BE (1) BE620763A (zh)
CH (1) CH402000A (zh)
DE (1) DE1255669B (zh)
ES (1) ES279532A1 (zh)
GB (1) GB1008768A (zh)
NL (2) NL129291C (zh)
SE (1) SE303137B (zh)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3242911A (en) * 1963-12-23 1966-03-29 Combustion Eng Apparatus and method for operating a vapor generator at subcritical and supercritical pressures
US3504655A (en) * 1967-10-11 1970-04-07 Foster Wheeler Corp Natural circulation start-up system for once-through steam generator
DE1551005B1 (de) * 1965-12-01 1972-11-30 Combustion Eng9neering, Ine , Windsor, Conn (VStA) Überkritischer Zwanglaufdampfer zeuger
US4953509A (en) * 1988-07-06 1990-09-04 Deutsche Babcock Werke Aktiengesellschaft Forced-circulation steam generator
US5730071A (en) * 1996-01-16 1998-03-24 The Babcock & Wilcox Company System to improve mixing and uniformity of furnace combustion gases in a cyclone fired boiler
WO2011026462A3 (de) * 2009-09-04 2012-08-16 Alstom Technology Ltd Zwangdurchlaufdampferzeuger für die verfeuerung von trockenbraunkohle
US9163834B2 (en) 2010-12-13 2015-10-20 Alstom Technology Ltd Forced flow steam generator having wall heating surface and method for its operation

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3320934A (en) * 1965-04-05 1967-05-23 Babcock & Wilcox Co Vapor generator
US3297004A (en) * 1965-08-26 1967-01-10 Riley Stoker Corp Supercritical pressure recirculating boiler
DE2144675C3 (de) * 1971-09-07 1981-05-27 Kraftwerk Union AG, 4330 Mülheim Durchlauf-Großdampferzeuger
JPS5719526Y2 (zh) * 1976-10-28 1982-04-24
DE4431185A1 (de) * 1994-09-01 1996-03-07 Siemens Ag Durchlaufdampferzeuger
CN109764328B (zh) * 2018-12-12 2020-08-25 华中科技大学 一种超临界二氧化碳锅炉使用方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2821965A (en) * 1952-10-01 1958-02-04 Combustion Eng Dual furnace with pressure equalizing means
US2856906A (en) * 1954-11-15 1958-10-21 Combustion Eng Boiler
GB831175A (en) * 1957-02-07 1960-03-23 Sulzer Ag Apparatus and method for controlling a forced flow once-through steam generator
US2952975A (en) * 1957-11-15 1960-09-20 Babcock & Wilcox Co Vapor generating and superheating unit
US2962005A (en) * 1958-05-16 1960-11-29 Babcock & Wilcox Co Forced flow vapor generating unit
US2999483A (en) * 1957-11-08 1961-09-12 Combustion Eng Furnace wall and support construction
US3038453A (en) * 1957-02-07 1962-06-12 Combustion Eng Apparatus and method for controlling a forced flow once-through steam generator

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2552830A (en) * 1948-08-06 1951-05-15 Comb Eng Superheater Inc Furnace wall construction

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2821965A (en) * 1952-10-01 1958-02-04 Combustion Eng Dual furnace with pressure equalizing means
US2856906A (en) * 1954-11-15 1958-10-21 Combustion Eng Boiler
GB831175A (en) * 1957-02-07 1960-03-23 Sulzer Ag Apparatus and method for controlling a forced flow once-through steam generator
US3038453A (en) * 1957-02-07 1962-06-12 Combustion Eng Apparatus and method for controlling a forced flow once-through steam generator
US2999483A (en) * 1957-11-08 1961-09-12 Combustion Eng Furnace wall and support construction
US2952975A (en) * 1957-11-15 1960-09-20 Babcock & Wilcox Co Vapor generating and superheating unit
US2962005A (en) * 1958-05-16 1960-11-29 Babcock & Wilcox Co Forced flow vapor generating unit

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3242911A (en) * 1963-12-23 1966-03-29 Combustion Eng Apparatus and method for operating a vapor generator at subcritical and supercritical pressures
DE1551005B1 (de) * 1965-12-01 1972-11-30 Combustion Eng9neering, Ine , Windsor, Conn (VStA) Überkritischer Zwanglaufdampfer zeuger
US3504655A (en) * 1967-10-11 1970-04-07 Foster Wheeler Corp Natural circulation start-up system for once-through steam generator
US4953509A (en) * 1988-07-06 1990-09-04 Deutsche Babcock Werke Aktiengesellschaft Forced-circulation steam generator
US5730071A (en) * 1996-01-16 1998-03-24 The Babcock & Wilcox Company System to improve mixing and uniformity of furnace combustion gases in a cyclone fired boiler
WO2011026462A3 (de) * 2009-09-04 2012-08-16 Alstom Technology Ltd Zwangdurchlaufdampferzeuger für die verfeuerung von trockenbraunkohle
CN102782405A (zh) * 2009-09-04 2012-11-14 阿尔斯通技术有限公司 用于干燥褐煤的燃烧的强制通流蒸汽发生器
CN102782405B (zh) * 2009-09-04 2016-01-13 阿尔斯通技术有限公司 用于干燥褐煤的燃烧的强制通流蒸汽发生器
AU2010291653B2 (en) * 2009-09-04 2016-03-17 General Electric Technology Gmbh Once-through steam generator for burning dry brown coal
US9163834B2 (en) 2010-12-13 2015-10-20 Alstom Technology Ltd Forced flow steam generator having wall heating surface and method for its operation
EP2652396B1 (en) * 2010-12-13 2016-03-02 ALSTOM Technology Ltd Forced flow steam generator having wall heating surface and method for its operation

Also Published As

Publication number Publication date
DE1255669B (de) 1967-12-07
NL129291C (zh)
US3135251A (en) 1964-06-02
GB1008768A (en) 1965-11-03
BE620763A (zh)
ES279532A1 (es) 1962-12-16
CH402000A (de) 1965-11-15
NL281273A (zh)
SE303137B (zh) 1968-08-19

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