US3590786A - Rotary boiler - Google Patents

Rotary boiler Download PDF

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Publication number
US3590786A
US3590786A US12296A US3590786DA US3590786A US 3590786 A US3590786 A US 3590786A US 12296 A US12296 A US 12296A US 3590786D A US3590786D A US 3590786DA US 3590786 A US3590786 A US 3590786A
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Prior art keywords
boiler
chamber
liquid
supply
end opening
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US12296A
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English (en)
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William A Doerner
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EIDP Inc
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EI Du Pont de Nemours and Co
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D11/00—Heat-exchange apparatus employing moving conduits
    • F28D11/02—Heat-exchange apparatus employing moving conduits the movement being rotary, e.g. performed by a drum or roller
    • F28D11/04—Heat-exchange apparatus employing moving conduits the movement being rotary, e.g. performed by a drum or roller performed by a tube or a bundle of tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
    • F01K11/04—Plants characterised by the engines being structurally combined with boilers or condensers the boilers or condensers being rotated in use
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B27/00—Instantaneous or flash steam boilers
    • F22B27/12—Instantaneous or flash steam boilers built-up from rotary heat-exchange elements, e.g. from tube assemblies
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28B—STEAM OR VAPOUR CONDENSERS
    • F28B1/00—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser
    • F28B1/06—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser using air or other gas as the cooling medium
    • F28B1/08—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser using air or other gas as the cooling medium employing moving walls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D11/00—Heat-exchange apparatus employing moving conduits

Definitions

  • FIGS. 1 A first figure.
  • the present invention relates to rotating boilers, and more particularly to rotating boilers of novel construction including novel means for maintaining the annular body of liquid in the boiler at the desired predetermined radialdepth during operation of the boiler.
  • Rotating boilers are known in the art of vapor generation and have been demonstrated to provide anumber of advantages over conventional boilers.
  • the high centrifugal acceleration in such a boiler produces a sharp stable interface between the liquid and vapor during boiling which is essentially cylindrical and concentric with the cylindrical heated boiler surface.
  • Such a boiler produces a highquality vapor with steady flow of both vapor and liquid and the boiler operates independent of gravity field and orientation.
  • the high rotational speeds customarily employed in rotating boilers permit heat fluxes well above the peak boiling level for normal gravity.
  • an object of the present invention is to provide a rotating boiler of novel design and construction which is operable to provide optimum beneficial utilization of the aforesaid advantages.
  • Another object of the invention is to provide a rotating boiler as set forth having novel means for automatically controlling and maintaining the radial depth of the annular body of liquid in the boiler chamber at the desired predetermined level.
  • Another object of the present invention is to provide a rotating boiler having novel liquid level control means as set forth which is efficient and foolproof in operation and of highly simplified construction devoid of moving parts.
  • a further object of the invention is to provide a rotating boiler construction as set forth which, among other uses, is especially suited and adapted for use, for example, in highperformance Rankine cycle power systems, Stirling engines, refrigeration, and for supplying vapors for heat exchange or chemical reaction elsewhere.
  • FIG. 1 is a sectional view taken diametrically through a rotary boiler embodying the present invention and showing the ,same schematically in a Rankine cycle power generation system including a turbine and a condenser;
  • FIG. 2 is a sectional view taken on line 2-2, of FIG. 1;
  • FIG. 3 is a fragmentary view on line 3-3, FIG. 2;
  • FIG. 4 is a fragmentary sectional view on line 4-4, FIG. 1',
  • FIG. 5 is an enlarged fragmentary sectional view on line 5-5, FIG. I;
  • FIG. 6 is a view similar to FIG. I showing a modified construction of the rotary boiler
  • FIG. 7 is a sectional view taken on line 7-7, FIG. 6;
  • FIG. 8 is a fragmentary sectional view on line 84!, FIG. 6, and
  • FIG. 9 is an enlarged sectional view on line 9-9, FIG. 7.
  • a rotary boiler constructed according to the present invention comprises an outer cylindrical casing I having a continuous circumferentially extending cylindrical wall 1 and sidewalls 3 and 4, respectively.
  • Fixedly secured to and extending coaxially outward from the casing sidewalls 3 and 4 are tubular shaft members 5 and 6, respectively, by means of which the boiler casing l is rotatably mounted in bearings 7 and 8.
  • the boiler may be rotationally driven at the desired speed by means of an electric motor M driving a gear 9 which in turn drives a gear 10 mounted on the shaft 6.
  • an inner cylindrical chamber ll that is defined by a continuous circumferential wall 12, the aforesaid casing sidewall 4 and an oppositely spaced sidewall 13.
  • shaft 5 and a conduit 14 for example.
  • the diameter of the inner chamber II is less than the diameter of the boiler casing 1 so that the cylindrical wall 12 of the inner chamber is spaced a predetermined distance radially inward from the casing wall 2 and defines therebetween an annular boiler chamber B.
  • the inner chamber wall 13 is spaced a predetermined distance from the adjacent casing wall 3.
  • the space thus defined between the cylindrical wall 12 of the inner chamber and the wall 2 of the casing and between the chamber sidewall 13 and easing sidewall 3 defines a vaporizing chamber V within the rotating boiler casing l.
  • the chamber V is in open communication with the tubular shaft 5 so that vapor generated in the boiler chamber 8 and collecting in the chamber V, as hereinafter described, is discharged from the rotating casing 1 through to a turbine 15.
  • Radial vanes I3a are provided in the chamber V between the walls 3 and 13 as shown in FIG. 4 to transfer rotational energy in the vapors back to the linear exit system as the vapors leave the boiler through the tubular shaft 5.
  • the interior ofthe inner chamber ll is in open communication with the tubular shaft 6 through which boiler feed liquid is admitted to the chamber II, for example, in the form of liquid condensate, through a pipe I6 from a condenser I7 having its inlet connected by a conduit 18 to the exhaust of the turbine 15.
  • a pipe I6 from a condenser I7 having its inlet connected by a conduit 18 to the exhaust of the turbine 15.
  • an imperforate baffle 19 Spaced inwardly from the tubular shaft 6 and from the boiler casing wall 4 is an imperforate baffle 19 which is disposed perpendicular to the rotational axis of the boiler casing.
  • This baffle 19 has a diameter slightly less than the diameter of the chamber wall 12 so that the peripheral edge 20 of the baffle I9 is spaced from the inner surface of the chamber wall 12 to permit the flow of boiler feed liquid from the shaft 6 about the peripheral edge 20 of the baflle l9 into the main portion of the chamber ll.
  • the spacing of the baffle edge 20 from the chamber wall 12 is less than the radial height or depth of the annular body of boiler feed liquid maintained in the chamber 11.
  • Radial vanes l9a are provided between the baffle I9 and easing wall 4 as shown in FIG. 5 to impart rotational movement to the feed liquid as it flows from the inlet shaft 6 to the periphery of the liquid chamber II.
  • the boiler casing 1 is driven by the motor M at a predetermined speed of rotation calculated to create the centrifugal force necessary to maintain the selected boiler feed liquid unifonnly distributed circumferentially about the boiler chamber B in contact with the inner surface of the casing wall 2, and to provide the desired boiler (vapor) pressure correlated to the radial length of the leg of feed liquid between the baffle I9 and easing wall 4.
  • the interface between the liquid and vapor in the chamber B is highly stable and is essentially cylindrical and concentric with the axis of rotation of the boiler.
  • the boiler feed liquid in the chamber ll is uniformly distributed circumferentially about the inner surface of the cylindrical cham ber wall 12.
  • the radial vanes I34 and I9a are desirable in a boiler of the present type to control radial flow of the liquid and vapor fluids for proper and efficient operation of the boiler.
  • the work W required to pump a unit weight of Iiquid condensate into the boiler is:
  • v is the boiler angular velocity
  • g is the acceleration of gravity
  • R is the radius from the rotational axis of the boiler to the liquid level line y shown in FIG. 1
  • R is the radius from said rotational axis to the liquid level line 1: in FIG. I.
  • a particular feature of the present invention resides in the construction and arrangement provided for supplying boiler feed liquid from the chamber I] to the boiler chamber B and for automatically maintaining the liquid level in the vaporizing chamber at the desired radial height or depth, for example, as indicated at x in the drawings.
  • the boiler feed liquid is supplied from the chamber 11 to the boiler chamber B by means of a plurality of radially disposed feed conduits 2
  • the radial inner ends of the conduits 21 are disposed flush with the inner surface of the chamber wall 12 and the radial outer ends of said conduits 21 are spaced inwardly from the inner surface of the casing wall 2 but extend or terminate below or beyond the liquid surface level x so that the outer ends of said conduits 21 are immersed in and covered by the annular body of liquid maintained uniformly about the inner surface of the boiler casing wall 2 by rotation of the boiler.
  • the body ofliquid in the boiler chamber B of the casing l is maintained at the desired predetermined level it by means of a plurality of radial sensor tubes or conduits 22 also mounted in the circumferential wall 12 of the inner chamber 11.
  • the sensor conduits 22 are equally spaced cireumferentially with respect to each other and the conduits 21 to insure rotational balance in the boiler.
  • the radial outer ends of the conduits 22 are disposed at the radius of the desired predetermined surfsce level I of the body of liquid in the boiler chamber B.
  • the inner ends of the conduits 22 are open to the interior of the chamber ii and extend radially inwardly to a point substantially spaced from the surface of the annular body ofliquid about the inner periphery ofthe chamber 11.
  • the annular body of liquid in the boiler chamber B may be heated to the required boiling temperature to vaporize the same, for example, by the combustion of a suitable fuel-air mixture in a combustion box 23 such as shown in the drawings.
  • the combustion borr 23 is a stationary structure of annular configuration that circumscribes the rotatable boiler casing l and comprises a radially spaced circumferentiully wall 24 and spaced apart annular sidewalls 25 and 26, the latter having offset inner flange portions 27 and 28 that closely overlie the peripheral edge portions of the opposite sidewalls 3 and 4 ofthe boiler casing 1.
  • the combustion box 23 defines an annular combustion chamber C surrounding the casing l and the outer surface of the casing peripheral wall 2 is provided with a plurality of clrcumfcrentially extending radial fins or rlbs 29 to provide maximum efficiency of heat transfer from the combustion chamber C to the annular body of liquid in the boiler caring I to heat the liquid to the desired boiling temperaturc.
  • Fuel for combustion in the chamber C is discharged tangentislly into said chamber from a nozzle 30 to which the fuel is supplied at the required rate and pressure by a pipe 31, and air for mixture with the fuel is discharged into the combustion chamber C through a plurality of ports 32 in l substantial segment of the peripheral wall 24 of the combustion chamber C.
  • the ports 32 are enclosed within a hood structure 33 that defines s plenum chamber 34 into which the air is supplied through it duct 35 from a pump or fun (not shown) at the pressure and volume required for efficient combustion of the fuel to heat the liquid in the boiler cttslng to the desired temperaturc.
  • Combustion of the fuel-air mixture extends substantially about the entire circumference of the rotating boiler and the residual products and gases of combustion are discharged through an outlet or exhaust duct 36.
  • a stationary baffle 37 having projecting portions 3! for complementary intertrtting cooperation with the flnr or ribs 291m the rotating boiler caslng I is mounted transversely of the combustion chamber C in termediste the fuel nozzle 30 and outlet duct 36, as shown in FIG. 3, to prevent recirculation of the combustion gases through the combustion chamber.
  • This interplay between fluctuations of the surface level of the liquid to open and close the outer ends of the sensor conduits 22 and the flow of liquid through the feed conduits 21 to replenish the liquid in the boiler and restore the surface to the desired level, is substantially continuous so that the surface level of the liquid in the boiler casing t is automatically main tained at all times during operation of the boiler substantially continuously at the line it shown in the drawings.
  • the radial depth or thickness of the annular body of liquid in the boiler chamber B is determined by and equal to the radial distance between the outer ends of the sensor conduits 22 and the inner surface of the casing wall 2, and therefore the radial depth of the annular body of liquid in the boiler chamber B and hence the radial position of the surface level line it shown in FIG. I, can be predetermined and controlled as desired by changing the space or gap between the outer ends of the sensor conduits 22 and the inner surface of the casing wall 2.
  • the boiler feed liquid in the chamber 11 is replenished by liquid supplied thereto through the shaft 6, in the present instance in the form of liquid condensate from the condenser 17.
  • the spent vapor discharged from the exhaust of the turbine I5 is conducted by the pipe 18 to the condenser 17 where it is condensed to liquid form and returned through pipe 16 to the inlet shaft 6 and chamber ll.
  • FIGS. 6, 7, B and 9 of the accompanying drawings Another embodiment of the invention is shown in FIGS. 6, 7, B and 9 of the accompanying drawings.
  • This form of the inventlon is generally similar in construction to the embodiment previously described but differs therefrom in certain details of construction and arrangement hereinafter described.
  • a rotary casing 50 is provided comprising a circumferential wall 51 and spaced opposing sidewalls 52 and 53 the latter having radial flanges 54 and 55 extending outwardly beyond the wall 51 and defining therebetween a space in which is mounted an outer boiler chamber 8' comprising a plurality of annular toroidal boiler sections 56.
  • Each of the annular toroidal boiler sections 56 is of tubular con struction, circular in cross section, and they are disposed in spaced relation to each other and to the wall 51 of the rotary casing 50 as shown.
  • the casing 50 is provided with axially projecting tubular shaft members 5a and 6a, respectlvely, by means of which the casingfil] is rotatably mounted in bearings 70 and 8a.
  • the casing 50 is rotationally driven at the desired speed by an electric motor M driving a gear 9a which in turn drives a gear 100 on said shaft 60.
  • a vapor chamber V Formed centrally within the casing 50 coaxially thereof is a vapor chamber V that is defined by a cylindrical wall member 57, the casing wall 52 and an oppositely spaced wall member 58.
  • the chamber V' is in open communication with the tubular shaft 5a so that vapor generated in the boiler sections 56 and admitted to said chamber V is discharged therefrom through said shaft 50 and a conduit 14a, for example, to a turbine a.
  • Radial vanes 52a are provided in the vapor chamber V' as shown in said FIGS. 6 and 7, and these vanes function the same as the vanes 13a previously described.
  • the diameter of the cylindrical wall 57 is less than the diameter of the casing cylindrical wall SI and is spaced inwardly therefrom to define therebetween an annular boiler liquid feed chamber 59.
  • the wall member 58 is spaced inwardly from the casing wall 53 and has a diameter slightly less than the cylindrical casing wall 5
  • the annular boiler liquid feed chamber 59 is in open communication with the tubular shaft 64 through which boiler feed liquid is supplied to said chamber 59, for example. in the form of liquid condensate, through a pipe 16a from a condenser 170 that has its inlet connected by a conduit I80 to the exhaust of the turbine 150.
  • the diameter of the wall 58 is such that the spacing of the peripheral edge 60 thereof from the casing wall 5] is less than the radial depth or height of the annular body of boiler feed liquid maintained in the chamber 59.
  • radial vanes 580 are provided in the feed liquid leg between the wall 58 and easing wall 53 as shown in FIG. 8 to impart rotational movement to the feed liquid similar to the vanes 19a previously described.
  • Boiler feed liquid is supplied from the chamber 59 to each of the toroidal tubular boiler sections 56 by means of feed conduits 61 mounted in the cylindrical wall 51 and extending inwardly of the boiler section 56.
  • feed conduits 61 mounted in the cylindrical wall 51 and extending inwardly of the boiler section 56.
  • is provided for each boiler section 56 and these conduits 6] are equally spaced circumferentially to insure rotational balance in the boiler.
  • the radial inner ends of the feed conduits 61 are disposed flush with the inner surface of the chamber wall SI and the radial outer ends of said conduits are spaced inwardly from the wall of the boiler sections 56, but extend or terminate below or beyond the liquid surface level .t' so that the outer ends of said conduits are immersed in and closed by the annu lar body of liquid maintained about the inner surface of the boiler sections by rotation of the casing 50.
  • Vapor generated in each of the toroidal boiler sections 56 by boiling the liquid therein is discharged into the chamber V' through vapor conduits 62 constructed and arranged as shown in FIGS. 6 and 7 of the drawings.
  • a plurality of such conduits 62 is provided for each boiler section 56 and, like the conduits 61, the said conduits are equally spaced circumferentially of the casing 50 with respect to one another to insure rotational balance in the boiler.
  • the body of liquid in each of the toroidal boiler sections 56 is maintained at the desired predetermined level 1' by sensor tubes or conduits 63 constructed and ar ranged as shown, a plurality of such tubes being provided for each boiler section and equally spaced circumferentially relative to the other conduits to insure rotational balance.
  • the radial outer ends of the conduits 63 are disposed at the radius of the desired predetermined liquid surface level x and their inner ends are open to the interior of the liquid feed chamber 59 inwardly beyond the surface level of the annular body of liquid therein.
  • each toroidal boiler section 56 may be heated to the required boiling temperature to generate vapor in the same manner as shown and described with respect to the first embodiment of the invention. Accordingly.
  • An important feature of a rotating boiler of the type described is the ability of such a boiler to produce high-quality vapor.
  • the centrifugal force resulting from rotation of the boiler and the fluid therein acts to enhance the separation of entrained liquid droplets from the exiting vapor in the chambers V and V.
  • This feature is especially important in the case of rotary boilers used in applications where the entrainment of liquid in the exiting vapors is undesirable, such as in driving a turbine.
  • a rotary boiler comprising a structure defining an annular boiler chamber
  • first conduit means providing for flow of liquid from the supply chamber to said boiler chamber
  • second conduit means communicating between said supply chamber and boiler chamber and cooperable with said first mentioned conduit means to control and maintain the radial depth of the liquid body in the boiler chamber substantially constant and at the desired predetermined surface level.
  • a rotary boiler as claimed in claim 1 wherein the first conduit means comprises at least one radially extending conduit having its inner end opening to the liquid body in the supply chamber and its outer end opening disposed radially outwardly of the desired predetermined surface level of the liquid body in said boiler chamber and immersed therein.
  • a rotary boiler as claimed in claim I wherein the second conduit means comprises at least one radially extending conduit having its inner end opening interiorly of the supply chamber inwardly from the liquid level therein and its outer end opening disposed at the desired predetermined surface level of the liquid body in the ;boiler chamber.
  • the second conduit means comprises at least one radially extending conduit having its inner end opening interiorly of the supply chamber inwardly from the liquid level therein and its outer end opening disposed at the desired predetermined surface level of the liquid body in the boiler chamber.
  • a rotary boiler as claimed in claim I wherein the first conduit means comprises a plurality of radially extending conduits each having its inner end opening to the liquid body in the supply chamber and its outer end opening disposed radially outwardly of the desired predetermined surface level of the liquid body in said boiler chamber and immersed therein,
  • said radially extending conduits being equally spaced circumferentially of the supply and boiler chambers to provide rotational balance in the boiler during rotation thereof.
  • a rotary boiler as claimed in claim I wherein the second conduit means comprises a plurality of radially extending conduits each having its inner end opening interiorly of the supply chamber inwardly from the liquid level therein and its outer end opening disposed at the desired predetermined surface level of the liquid body in the boiler chamber,
  • said radially extending conduits being equally spaced circumferentially of the supply and boiler chambers to provide rotational balance in the boiler during rotation thereof.
  • a rotary boiler as claimed in claim wherein the second conduit means comprises a plurality of radially extending conduits each having its inner end opening to the liquid body in the supply chamber inwardly from the liquid level therein and its outer end opening disposed radially outward of the desired predetermined surface level of the liquid body in said boiler chamber and immersed therein,
  • said radially extending conduits being equally spaced circumferentially of the supply and boiler chambers to provide rotational balance in the boiler during rotation.
  • a rotary boiler as claimed in claim 1 wherein means is provided to heat the liquid in the boiler chamber to the desired temperature to vaporize said liquid.
  • a rotary boiler as claimed in claim 8 wherein a vapor chamber is provided in communication with the boiler chamber to receive the vapor generated in the boiler chamber.
  • a rotary boiler as claimed in claim 9 wherein the means mounting the boiler chamber structure for rotation about its axis includes a pair of coaxially projecting tubular shafts at respectively opposite sides of said structure,
  • one of said shafts communicating with the vapor chamber and constituting an outlet for the vapor generated in the boiler chamber and the other of said shafts communicating with the supply chamber to admit liquid thereto.
  • a rotary boiler as claimed in claim 8 wherein the means provided to heat the liquid in the boiler chamber comprises a stationary combustion box circumscribing the rotary boiler structure
  • a rotary boiler as claimed in claim 12 wherein chamber. 14.
  • the first conduit means comprises at least one radially extending tube having its inner end opening to the liquid body in the supply chamber and its outer end opening disposed radially outwardly of the desired predetermined surface level of the liquid body in each boiler section and immersed therein.
  • a rotary boiler as claimed in claim 12 wherein the second conduit means comprises at least one radially extending conduit having its inner end opening intcriorly of the supply chamber inwardly from the liquid level therein and its outer end opening disposed at the desired predetermined surface level of the liquid body in each boiler section.
  • a rotary boiler comprising a structure defining an annular boiler chamber and a vapor chamber in communication with said boiler chamber,
  • one of said shafts communicating with said vapor chamber and constituting an outlet for the vapor generated in the boiler chamber
  • first conduit means providing for flow of liquid from the supply chamber to said boiler chamber
  • said first conduit means comprising a plurality of radially extending feed tubes each having its inner end opening interiorly of the supply chamber inwardly from the liquid level therein and its outer end disposed radially outwardly of the surface level of the liquid body in the boiler chamber and immersed therein,
  • second conduit means comprising a plurality of radially extending sensor tubes each having its inner end opening interiorly of the supply chamber inwardly from the liquid level therein and its outer end opening disposed at the desired predetermined surface level of the liquid body in the boiler chamber,
  • said sensor tubes being operable in conjunction with said feed tubes to control and maintain the radial depth of the liquid body in the boiler chamber substantially constant and at the desired predetermined surface level
  • a rotary boiler as claimed in claim 16 wherein the means provided to heat the liquid in the boiler chamber comprises a stationary combustion box circumscribing the rotary boiler structure,

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Control Of Steam Boilers And Waste-Gas Boilers (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
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US12296A 1970-02-18 1970-02-18 Rotary boiler Expired - Lifetime US3590786A (en)

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US1229670A 1970-02-18 1970-02-18

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US (1) US3590786A (de)
DE (1) DE2107872A1 (de)
FR (1) FR2078719A5 (de)
GB (1) GB1331563A (de)
SE (1) SE360165B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3690302A (en) * 1971-03-25 1972-09-12 Du Pont Rotary boilers
FR2213474A1 (de) * 1972-11-23 1974-08-02 Finventa Holding
US5010735A (en) * 1989-10-06 1991-04-30 Geophysical Engineering Company Centrifugal heat engine and method for using the same

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009022773A1 (de) 2009-05-19 2010-11-25 Wolfgang Maier Rotationsverdampfer

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2098841A (en) * 1937-04-10 1937-11-09 Heil Co Steam generator
US3051144A (en) * 1958-10-06 1962-08-28 Dynamic Engineering Corp Rotary hot water and steam generator

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2098841A (en) * 1937-04-10 1937-11-09 Heil Co Steam generator
US3051144A (en) * 1958-10-06 1962-08-28 Dynamic Engineering Corp Rotary hot water and steam generator

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3690302A (en) * 1971-03-25 1972-09-12 Du Pont Rotary boilers
FR2213474A1 (de) * 1972-11-23 1974-08-02 Finventa Holding
US5010735A (en) * 1989-10-06 1991-04-30 Geophysical Engineering Company Centrifugal heat engine and method for using the same

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FR2078719A5 (de) 1971-11-05
SE360165B (de) 1973-09-17
DE2107872A1 (de) 1971-08-26
GB1331563A (en) 1973-09-26

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