Catalytic combustion
First Claim
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1. A method of constructing a catalytic heater, comprising the steps of:
- (a) fabricating a first fluid carrying member having a plurality of wall surfaces, one of which is coated with a catalyst and another of which is uncoated;
(b) fabricating a second member precluded from carrying the same fluid as said first member and having inner and outer wall surfaces, with said inner wall surface spaced from an uncoated wall surface of said first member and said outer wall surface receiving a medium to be heated; and
(c) providing for the application of a gaseous fuel/oxidizer mixture to said coated wall surface of said first member and producing combustion on said catalyst.
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Abstract
A self contained catalytic heating device within which a fuel/oxidizer mixture and combustion products are held out of physical contact with a heated medium, allowing the temperature of the catalytic material to be maintained at a level that is independent of the temperature at the surface in contact with the heated medium; materials and geometric dimensions can be chosen to achieve required temperatures for catalytically coated surfaces and heating surfaces, for example in a tubular construction.
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Citations
19 Claims
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1. A method of constructing a catalytic heater, comprising the steps of:
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(a) fabricating a first fluid carrying member having a plurality of wall surfaces, one of which is coated with a catalyst and another of which is uncoated; (b) fabricating a second member precluded from carrying the same fluid as said first member and having inner and outer wall surfaces, with said inner wall surface spaced from an uncoated wall surface of said first member and said outer wall surface receiving a medium to be heated; and (c) providing for the application of a gaseous fuel/oxidizer mixture to said coated wall surface of said first member and producing combustion on said catalyst. - View Dependent Claims (2)
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3. A catalytic heater, comprising
a first tubular member having at least two wall surfaces, one of which is coated with a catalyst and another of which is uncoated; -
a second member spaced from an uncoated wall surface of said first member; means for applying a gaseous fuel/oxidizer mixture to said coated wall surface of said first member and producing combustion on said catalyst; means for contacting said second member with at least one medium to be heated; wherein said first member is a catalytic inner tube with opposed wall surfaces, of which an inside wall surface is coated with a catalyst and another of which is uncoated, and said second member is a plurality of outer tubes facing, spaced from and surrounding said inner tube. - View Dependent Claims (4)
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5. A catalytic heater, comprising
a first tubular member having at least two wall surfaces, one of which is coated with a catalyst and another of which is uncoated; -
a second tubular member spaced from an uncoated wall surface of said first member; means for applying a gaseous fuel/oxidizer mixture to said coated wall surface of said first member and producing combustion on said catalyst; and means for contacting said second member with at least one medium to be heated;
wherein the interval between the first and second members is at least partially occupied by conductive packing material.
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6. Apparatus as defined in claim 6 wherein said members are heat absorptive to provide substantially constant heat output per unit length.
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7. A catalytic heater, comprising
a first tubular member having at least two wall surfaces, one of which is coated with a catalyst and another of which is uncoated; -
a second tubular member spaced from an uncoated wall surface of said first member; means for applying a gaseous fuel/oxidizer mixture to said coated wall surface of said first member and producing combustion on said catalyst; and means for contacting said second member with at least one medium to be heated; wherein the interval between the first and second members is maintained by a plurality of fins therebetween. - View Dependent Claims (8)
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9. A catalytic heater, comprising
a first tubular member constituting a catalytic inner tube with opposed wall surfaces including an inside wall surface coated with a catalyst and an uncoated outside wall surface; -
a second tubular member uniformly surrounding said inner tube and uniformly spaced from said uncoated wall surface of said first tubular member; means for applying a gaseous fuel/oxidizer mixture to said coated wall surface of said first tubular member and producing combustion on said catalyst; and mean for contacting said second member with at least one medium to be heated. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A method of catalytic heating, comprising the steps of:
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(a) providing a first member having a plurality of wall surfaces, one of which is coated with a catalyst and another of which is uncoated; (b) providing a second member having an outer surface and an inner surface surrounding and spaced from an uncoated wall surface of said first member; (c) applying a gaseous fuel/oxidizer mixture to said coated wall surface of said first member and producing combustion on said catalyst; and (d) contacting said outer surface of said second member with at least one medium to be heated. - View Dependent Claims (16, 17, 18, 19)
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Specification