US3119439A - Mounting of combustion elements - Google Patents

Mounting of combustion elements Download PDF

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Publication number
US3119439A
US3119439A US840769A US84076959A US3119439A US 3119439 A US3119439 A US 3119439A US 840769 A US840769 A US 840769A US 84076959 A US84076959 A US 84076959A US 3119439 A US3119439 A US 3119439A
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tube
fibrous
casing
diaphragm
mounting
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US840769A
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Weiss Gerhart
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American Thermocatalytic Corp
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American Thermocatalytic Corp
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D91/00—Burners specially adapted for specific applications, not otherwise provided for
    • F23D91/02—Burners specially adapted for specific applications, not otherwise provided for for use in particular heating operations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2206/00—Burners for specific applications
    • F23D2206/0057—Liquid fuel burners adapted for use in illumination and heating
    • F23D2206/0063—Catalytic burners adapted for use in illumination and heating

Definitions

  • One of the objects of the invention is to mount a hollow, elongated, porous, tubular element at both ends thereof in such a manner as to insure feeding of the fuel vapor to its interior, and carrying off of the exhaust gases emerging from its walls, while insuring. during operation safe support substantially independent from the rapid temperature changes involved in start, operation and stoppage, respectively, of such combustion elements.
  • heating apparatus comprising a rigid cylindrical metal casing, as well as a cylindrical, porous, open-ended, fibrous, self-supporting tube highly resistant to heat and of smaller diameter than the casing and disposed therein axially thereof.
  • the tube and the casing have different temperature coeficients of expansion.
  • a rigid end cap closes one end of the casing and is formed with an axially disposed inlet opening.
  • a flexible and resilient diaphragm is supported on the inner face of the end cap with the major portion of the flexible diaphragm spaced inwardly from the inner face of the end cap. The cap and the diaphragm are cooperatively shaped to form a hollow chamber.
  • the flexible diaphragm has an opening axially thereof, and a further tube is fixed to the diaphragm and extends thereinto through the opening thereof. Said further tube extends frictionally into the bore of the fibrous tube a short distance.
  • the flexible diaphragm is adapted to be flexed so as to permit radial movement of the fibrous tube and of the further tube.
  • the end cap, the flexible diaphragm and the further tube are cooperatively shaped and connected to define a through passage between the outer face of the end cap and the interior of the fibrous tube for flow of an air-fuel gas mixture therethrough.
  • the other end of the fibrous tube is spaced from the other end of the casing.
  • the other end of the casing has an exhaust opening, and said other end of said fibrous tube is plugged by plugging means of temperature coefiicient of expansion substantially the same as that of the fibrous tube.
  • the plugging means has spacer means extending radially therefrom beyond the periphery of the fibrous tube and formed with exhaust ports therethrough.
  • FIG. 1 is a perspective view of the combustion tube in accordance with the invention, showing the flexible diaphragm on one end thereof and the plugging means on the other end thereof.
  • FIG. 2 is a perspective view of the complete assembly of the combustion tube of FIG. 1 with the outer casing and associated elements.
  • FIG. 3 is a vertical longitudinal section of the assembly shown in FIG. 2..
  • FIG. 4 is an end view of the assembly of FIGS. 2 and 3, taken in the direction looking toward the plugging means.
  • FIG. 5 is an end view of the assembly of FIGS. 2 and 3, looking toward the opposite end from that; of FIG. 4.
  • FIG. 6 is a view corresponding to FIG. 4, but showing a second embodiment of the plugging means-
  • a catalytic heater element such as shown at 1 and consisting, for example, of catalyticallyactive fibers sintered into the form of a hollow tube is supported at its inlet end on a. high heatvresistant, metallic sleeve or inner fejeder tube 2. (FIG. 3) which. in turn is supported on a. thin, preferably flexible and; heatresisting or metallic diaphragm or sheet. 3,, consistingfor example of stainless steel foil of. the shape approximately indicated in FIGS. 1 and 3-.
  • Sleeve 2 is provided with an outer projection, 4 serving as a stop for the mountingv of heater tube 1 while another inner projection 5 forms a stop for the mounting of foil 3 supporting feeder tube 2 and heater tube 1.
  • the central supporting surface of foil 3 has an axial opening intov which tube 2 extends.
  • Foil 3' at its central supporting surface for feeder tube 2, is welded or brazed to feeder tube 2 while at its periphery, it is bent out of its plane, and supported; or clamped at. 7 between section 12 of outer tube 8 and the end wall of closure cap 9.
  • Said tube 8 is rigid and cylindrical and serves as the outer casingv of the as.- sembly. Tube 8 together with tube 1 and closure cap 9 forms a channel for the hot exhaust gases passing in the direction 10 after having entered in the form of fuel vapors through inner feeder tube 2 in the direction of arrow 11.
  • Closure cap 9 is attached upon section 12 of outer tube 8 and has an opening 9a supporting an inlet tube 13 permitting access of the fuel vapors in direct-ion 11.
  • lFoil 3 is also shaped bulging :out at its central portion in the manner indicated in FIGS. 1 and 3 to provide a space or hollow chamber 3b between the supporting or central portion of foil 3 and the inner end of inlet tube 13 thereby increasing flexibility as well as expansibility and compressibility in all directions of the heater assembly under control of widely varying temperatures such as occur in combustion heater installations.
  • the surrounding front section 12 of outer tube 8 is made of a separate piece of stainless steel or other heat resistant material. If necessary outer tube 8 including section 12 can be made of one piece of stainless steel.
  • Heater tube 1 at its rear end is shown to be supported on a plug element 14, consisting preferably of heat insulating material and provided at its periphery with radial extensions or ribs 15 providing exhaust ports therebetween and permitting passage therebetween of the exhaust gases in the direction of arrow 10, while supporting heater tube 1 spaced inside outer tube 8.
  • the supporting plug element of spider shape as shown in FIGS. 1, 3 and 4 at 14, 15, it maybe made to consist of a disc 16 provided with a number of openings or exhaust ports 17, adapted to permit passage of exhaust gases while suppressing passage of flame 'therethrough (see FIG. 6).
  • Cover 9 is removable by turning.
  • a bayonet type closure schematically indicated at 18, serves to close extension 12 of the outer tube 8 in a gas-tight manner at its front end.
  • This closure is effected, preferably as illustrated in FIG. 3, by pressing the outer feeder tube 13 (which is Welded, brazed or otherwise attached) to cover 9 through gaskets 20 and 21 against the outer peripheral portion 7 of supporting disc or diaphragm 3, which in turn is thus clamped to the front edge of section 12 of outer tube 8.
  • the bayonet closure may be replaced by a thread without departing from the scope of this disclosure.
  • the front section 12 of outer casing 8 has a peripheral opening for the insertion of an exciter or igniter element such as a catalytically-active platinum wire, or of a thermostat or any other control element or elements, schematically indicated in FIG. 3 at 22.
  • an exciter or igniter element such as a catalytically-active platinum wire, or of a thermostat or any other control element or elements, schematically indicated in FIG. 3 at 22.
  • the invention is not limited to the type, shape, form, or material of the supporting elements shown or described nor to the particular shape of the heater and heat carrying tubes, accessories or parts nor to the particular arrangement of the supporting and control mechanisms disclosed but may be applied in any form or manner whatsoever without departing from the scope of this disclosure.
  • Heating apparatus comprising a rigid cylindrical metal casing, a cylindrical, porous, open-ended, fibrous, selfsupporting tube highly resistant to heat and of smaller diameter than said casing and disposed therein co-axially thereof, said tube and said casing having different temperature coefiicients of expansion, a rigid end cap closing one end of said casing and being formed with an axially disposed inlet opening, a flexible and resilient diaphragm, means supporting said flexible diaphragm on the inner face of said end cap with the major portion of said flexible diaphragm spaced inwardly from said inner face of said end cap, said cap and diaphragm being cooperatively shaped to form a hollow chamber, said flexible diaphragm having an opening axially thereof, a further tube fixed to said diaphragm and extending thereinto through said opening thereof, said further tube extending frictionally into the bore of said fibrous tube a short distance, said flexible diaphragm being adapted to be flexed so as to permit radial movement

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Description

Jan. 28,1964 e. WEISS 3,119,439
MOUNTING o1 COMBUSTION ELEMENTS Filed Sept. 17, 1959 INVENTOR.
Gerhurt Weiss BY ATTORNEYS United States Patent 3,119,439 MOUNTING. 0F COMBUSTION ELEMENTS Gerhart Weiss, Mineola, N.Y., assignor to American Thermocatalytic Corporation, Mineola, N.Y., a corporation of New York Filed Sept. 17, 1959, Ser. No. 840,769 1 Claim. (Cl. 158-99) This invention relates to the arrangement of combus-- tion elements and more specifically, to a mounting which permits easy access to, and replacement of, combustion elements with minimum handling and effect on the structure of these elements and their connections to the various parts and accessories of a complete heating system.
One of the objects of the invention is to mount a hollow, elongated, porous, tubular element at both ends thereof in such a manner as to insure feeding of the fuel vapor to its interior, and carrying off of the exhaust gases emerging from its walls, while insuring. during operation safe support substantially independent from the rapid temperature changes involved in start, operation and stoppage, respectively, of such combustion elements.
In accordance with preferred embodiments of the invention, there is provided heating apparatus comprising a rigid cylindrical metal casing, as well as a cylindrical, porous, open-ended, fibrous, self-supporting tube highly resistant to heat and of smaller diameter than the casing and disposed therein axially thereof. The tube and the casing have different temperature coeficients of expansion. A rigid end cap closes one end of the casing and is formed with an axially disposed inlet opening. A flexible and resilient diaphragm is supported on the inner face of the end cap with the major portion of the flexible diaphragm spaced inwardly from the inner face of the end cap. The cap and the diaphragm are cooperatively shaped to form a hollow chamber.
The flexible diaphragm has an opening axially thereof, and a further tube is fixed to the diaphragm and extends thereinto through the opening thereof. Said further tube extends frictionally into the bore of the fibrous tube a short distance. The flexible diaphragm is adapted to be flexed so as to permit radial movement of the fibrous tube and of the further tube. The end cap, the flexible diaphragm and the further tube are cooperatively shaped and connected to define a through passage between the outer face of the end cap and the interior of the fibrous tube for flow of an air-fuel gas mixture therethrough.
The other end of the fibrous tube is spaced from the other end of the casing. The other end of the casing has an exhaust opening, and said other end of said fibrous tube is plugged by plugging means of temperature coefiicient of expansion substantially the same as that of the fibrous tube. The plugging means has spacer means extending radially therefrom beyond the periphery of the fibrous tube and formed with exhaust ports therethrough.
It will be apparent from the foregoing that the structure in accordance with this invention may be readily assembled and at the same time requires the desired flexible mounting for the fibrous combustion tube.
Other objects of the invention will become apparent from the following description in conjunction with the annexed drawing, in which preferred embodiments of the invention are disclosed:
FIG. 1 is a perspective view of the combustion tube in accordance with the invention, showing the flexible diaphragm on one end thereof and the plugging means on the other end thereof.
FIG. 2 is a perspective view of the complete assembly of the combustion tube of FIG. 1 with the outer casing and associated elements.
FIG. 3 is a vertical longitudinal section of the assembly shown in FIG. 2..
FIG. 4 is an end view of the assembly of FIGS. 2 and 3, taken in the direction looking toward the plugging means.
FIG. 5 is an end view of the assembly of FIGS. 2 and 3, looking toward the opposite end from that; of FIG. 4.
FIG. 6 is a view corresponding to FIG. 4, but showing a second embodiment of the plugging means- In FIGS. 1, 2 andv 3, a catalytic heater element such as shown at 1 and consisting, for example, of catalyticallyactive fibers sintered into the form of a hollow tube is supported at its inlet end on a. high heatvresistant, metallic sleeve or inner fejeder tube 2. (FIG. 3) which. in turn is supported on a. thin, preferably flexible and; heatresisting or metallic diaphragm or sheet. 3,, consistingfor example of stainless steel foil of. the shape approximately indicated in FIGS. 1 and 3-.
Sleeve 2 is provided with an outer projection, 4 serving as a stop for the mountingv of heater tube 1 while another inner projection 5 forms a stop for the mounting of foil 3 supporting feeder tube 2 and heater tube 1. The central supporting surface of foil 3 has an axial opening intov which tube 2 extends.
Foil 3', at its central supporting surface for feeder tube 2, is welded or brazed to feeder tube 2 while at its periphery, it is bent out of its plane, and supported; or clamped at. 7 between section 12 of outer tube 8 and the end wall of closure cap 9. Said tube 8 is rigid and cylindrical and serves as the outer casingv of the as.- sembly. Tube 8 together with tube 1 and closure cap 9 forms a channel for the hot exhaust gases passing in the direction 10 after having entered in the form of fuel vapors through inner feeder tube 2 in the direction of arrow 11.
Closure cap 9 is attached upon section 12 of outer tube 8 and has an opening 9a supporting an inlet tube 13 permitting access of the fuel vapors in direct-ion 11.
lFoil 3 is also shaped bulging :out at its central portion in the manner indicated in FIGS. 1 and 3 to provide a space or hollow chamber 3b between the supporting or central portion of foil 3 and the inner end of inlet tube 13 thereby increasing flexibility as well as expansibility and compressibility in all directions of the heater assembly under control of widely varying temperatures such as occur in combustion heater installations.
In order to facilitate manufacture and assembly at the front end of heater element 1, the surrounding front section 12 of outer tube 8 is made of a separate piece of stainless steel or other heat resistant material. If necessary outer tube 8 including section 12 can be made of one piece of stainless steel.
Heater tube 1 at its rear end is shown to be supported on a plug element 14, consisting preferably of heat insulating material and provided at its periphery with radial extensions or ribs 15 providing exhaust ports therebetween and permitting passage therebetween of the exhaust gases in the direction of arrow 10, while supporting heater tube 1 spaced inside outer tube 8. The spaces 14a between the spacer means or radial extensions 15, and also bounded by the central part of the plug element 14 and the tube or casing 18, accordingly serve as exhaust ports for flow of the exhaust gases out of the end of the casing.
Instead of making the supporting plug element of spider shape as shown in FIGS. 1, 3 and 4 at 14, 15, it maybe made to consist of a disc 16 provided with a number of openings or exhaust ports 17, adapted to permit passage of exhaust gases while suppressing passage of flame 'therethrough (see FIG. 6).
All these arrangements facilitate removal and/ or replacement of heater tube 1 as a structural unit.
Cover 9 is removable by turning. A bayonet type closure schematically indicated at 18, serves to close extension 12 of the outer tube 8 in a gas-tight manner at its front end. This closure is effected, preferably as illustrated in FIG. 3, by pressing the outer feeder tube 13 (which is Welded, brazed or otherwise attached) to cover 9 through gaskets 20 and 21 against the outer peripheral portion 7 of supporting disc or diaphragm 3, which in turn is thus clamped to the front edge of section 12 of outer tube 8.
The bayonet closure may be replaced by a thread without departing from the scope of this disclosure.
The front section 12 of outer casing 8 has a peripheral opening for the insertion of an exciter or igniter element such as a catalytically-active platinum wire, or of a thermostat or any other control element or elements, schematically indicated in FIG. 3 at 22.
The invention is not limited to the type, shape, form, or material of the supporting elements shown or described nor to the particular shape of the heater and heat carrying tubes, accessories or parts nor to the particular arrangement of the supporting and control mechanisms disclosed but may be applied in any form or manner whatsoever without departing from the scope of this disclosure.
What is claimed is:
Heating apparatus comprising a rigid cylindrical metal casing, a cylindrical, porous, open-ended, fibrous, selfsupporting tube highly resistant to heat and of smaller diameter than said casing and disposed therein co-axially thereof, said tube and said casing having different temperature coefiicients of expansion, a rigid end cap closing one end of said casing and being formed with an axially disposed inlet opening, a flexible and resilient diaphragm, means supporting said flexible diaphragm on the inner face of said end cap with the major portion of said flexible diaphragm spaced inwardly from said inner face of said end cap, said cap and diaphragm being cooperatively shaped to form a hollow chamber, said flexible diaphragm having an opening axially thereof, a further tube fixed to said diaphragm and extending thereinto through said opening thereof, said further tube extending frictionally into the bore of said fibrous tube a short distance, said flexible diaphragm being adapted to be flexed so as to permit radial movement of said fibrous and further tubes, said end cap, said flexible diaphragm and said further tube being cooperatively shaped and connected to define a through passage between the outer face of said end cap and the interior of said fibrous tube for flow of an airfuel gas mixture therethrough, the other end of said fibrous tube being spaced from the other end of said casing, said other end of said casing having an exhaust opening, and plugging means of temperature coefficient of expansion substantially the same as that of said fibrous tube plugging said other end of said fibrous tube, said plugging means having spacer means extending radially therefrom beyond the periphery of said fibrous tube and being formed with exhaust ports therethrough.
References Cited in the file of this patent UNITED STATES PATENTS 821,939 Harris May 29, 1906 1,213,470 Finlay Jan. 23, 1917 2,048,993 Claffey et a1 July 28, 1936 2,253,920 Vaughn Aug. 26, 1941 2,336,879 Mekler Dec. 14, 1943 2,821,510 Gottwald Jan, 28, 1958 FOREIGN PATENTS 183,084 Austria Sept. 10, 1955 1,056,454 France Oct. 21, 1953
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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3173470A (en) * 1961-11-17 1965-03-16 Gen Precision Inc Gas-fueled radiant heater
US3315646A (en) * 1965-01-22 1967-04-25 American Radiator & Standard Boiler
US3520646A (en) * 1968-05-16 1970-07-14 Tokyo Gas Co Ltd Pre-mixing type gas burner
US3731668A (en) * 1971-05-19 1973-05-08 Impala Ind Inc Catalytic heater
US3733164A (en) * 1970-07-13 1973-05-15 Shell Oil Co Porous media tunnel burner
US3804163A (en) * 1972-06-08 1974-04-16 Sun Oil Co Catalytic wellbore heater
US3947233A (en) * 1971-04-26 1976-03-30 C. A. Sundberg Ab Free-burning equipment
US4318392A (en) * 1980-08-11 1982-03-09 Acurex Corporation Catalytic gas-fired furnace system and method
US4408984A (en) * 1980-04-05 1983-10-11 Kernforschungsanlange Julich Gesellschaft Mit Beschrankter Haftung Burner for the formation and combustion of an ignitable mixture of a liquid fuel and combustion air
US4732559A (en) * 1986-02-11 1988-03-22 Uniweld Products Incorporated Combustion device
US4846670A (en) * 1986-02-11 1989-07-11 Pearl Ii David S Combustion device
US5544644A (en) * 1994-05-13 1996-08-13 Dubix De Souza Snc Drying and ironing machine having a rotary cylinder equipped with an improved pipe burner
WO1999014534A1 (en) * 1997-09-17 1999-03-25 Catalytic Systems Technologies Ltd. Catalytic radiant tube heater and method for its use
US20090277969A1 (en) * 2006-09-18 2009-11-12 Briselden Thomas D Radiant Heat Transfer System

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US821939A (en) * 1905-04-12 1906-05-29 Richard E Harris Water-heater.
US1213470A (en) * 1913-08-05 1917-01-23 Robert Gilmour Finlay Process for securing heat energy from combustible substances.
US2048993A (en) * 1934-11-16 1936-07-28 United Gas Improvement Co Gas filter
US2253920A (en) * 1939-01-06 1941-08-26 Electric Furnace Co Radiant tube heater
US2336879A (en) * 1942-07-10 1943-12-14 Universal Oil Prod Co Reactor
FR1056454A (en) * 1954-02-26
AT183084B (en) * 1938-01-19 1955-09-10 Baker & Co Inc Process and filter for the recovery of precious metals from precious metal catalysts
US2821510A (en) * 1954-01-20 1958-01-28 Gottwald Antonin Catalyst carrier for catalytic heaters and method of making same

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1056454A (en) * 1954-02-26
US821939A (en) * 1905-04-12 1906-05-29 Richard E Harris Water-heater.
US1213470A (en) * 1913-08-05 1917-01-23 Robert Gilmour Finlay Process for securing heat energy from combustible substances.
US2048993A (en) * 1934-11-16 1936-07-28 United Gas Improvement Co Gas filter
AT183084B (en) * 1938-01-19 1955-09-10 Baker & Co Inc Process and filter for the recovery of precious metals from precious metal catalysts
US2253920A (en) * 1939-01-06 1941-08-26 Electric Furnace Co Radiant tube heater
US2336879A (en) * 1942-07-10 1943-12-14 Universal Oil Prod Co Reactor
US2821510A (en) * 1954-01-20 1958-01-28 Gottwald Antonin Catalyst carrier for catalytic heaters and method of making same

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3173470A (en) * 1961-11-17 1965-03-16 Gen Precision Inc Gas-fueled radiant heater
US3315646A (en) * 1965-01-22 1967-04-25 American Radiator & Standard Boiler
US3520646A (en) * 1968-05-16 1970-07-14 Tokyo Gas Co Ltd Pre-mixing type gas burner
US3733164A (en) * 1970-07-13 1973-05-15 Shell Oil Co Porous media tunnel burner
US3947233A (en) * 1971-04-26 1976-03-30 C. A. Sundberg Ab Free-burning equipment
US3731668A (en) * 1971-05-19 1973-05-08 Impala Ind Inc Catalytic heater
US3804163A (en) * 1972-06-08 1974-04-16 Sun Oil Co Catalytic wellbore heater
US4408984A (en) * 1980-04-05 1983-10-11 Kernforschungsanlange Julich Gesellschaft Mit Beschrankter Haftung Burner for the formation and combustion of an ignitable mixture of a liquid fuel and combustion air
US4318392A (en) * 1980-08-11 1982-03-09 Acurex Corporation Catalytic gas-fired furnace system and method
US4732559A (en) * 1986-02-11 1988-03-22 Uniweld Products Incorporated Combustion device
US4846670A (en) * 1986-02-11 1989-07-11 Pearl Ii David S Combustion device
US5544644A (en) * 1994-05-13 1996-08-13 Dubix De Souza Snc Drying and ironing machine having a rotary cylinder equipped with an improved pipe burner
US5992409A (en) * 1996-12-02 1999-11-30 Catalytic Systems Technologies Ltd. Catalytic radiant tube heater and method for its use
WO1999014534A1 (en) * 1997-09-17 1999-03-25 Catalytic Systems Technologies Ltd. Catalytic radiant tube heater and method for its use
US20090277969A1 (en) * 2006-09-18 2009-11-12 Briselden Thomas D Radiant Heat Transfer System

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