US3919783A — Method for hot gas heat transfer, particularly fo…

Claim 1

Independent Claim 104 words

THE METHOD OF SUPPLYING HEAT FOR HEAT TRANSFER, WHICH INCLUDES PRODUCING CLEAN HOT HIGH PRESSURE COMBUSTION GASES BY MIXING FUEL AND OXYGEN-BEARING GASES IN A CONFINED PRIMARY SPACE, COMBUSING SAID MIXTURE TO PRODUCE HOT HIGH PRESSURE GASES AS COMBUSTION PRODUCTS, EXPANDING AT LEAST A PORTION OF SAID COMBUSTION PRODUCTS IN THE ACTUATION OF COMPRESSOR MEANS WHEREBY TO COMPRESS ADDITIONAL OXYGEN-BEARING GASES, MIXING AT LEAST A PORTION OF THE LATTER WITH ADDITIONAL FUEL IN A SECONDARY COMBUSTION SPACE AT SUBSTANTIALLY HIGHER TEMPERATURES, AND COMBINING THE HOT HIGGH PRESSURE GASES FROM SAID SECONDARY COMBUSTION SPACE WITH EXHAUST GASES DERIVED FROM THE ACTUATION OF SAID COMPRESSOR MEANS.

Claim 2

Independent Claim 104 words

THE METHOD OF SUPPLYING HEAT FOR HEAT TRANSFER, WHICH INCLUDES PRODUCING CLEAN HOT HIGH PRESSURE COMBUSTION GASES BY MIXING FUEL AND OXYGEN-BEARING GASES IN A CONFINED PRIMARY SPACE, COMBUSING SAID MIXTURE TO PRODUCE HOT HIGH PRESSURE GASES AS COMBUSTION PRODUCTS, EXPANDING AT LEAST A PORTION OF SAID COMBUSTION PRODUCTS IN THE ACTUATION OF COMPRESSOR MEANS WHEREBY TO COMPRESS ADDITIONAL OXYGEN-BEARING GASES, MIXING AT LEAST A PORTION OF THE LATTER WITH ADDITIONAL FUEL IN A SECONDARY COMBUSTION SPACE AT SUBSTANTIALLY HIGHER TEMPERATURES, AND COMBINING THE HOT HIGGH PRESSURE GASES FROM SAID SECONDARY COMBUSTION SPACE WITH EXHAUST GASES DERIVED FROM THE ACTUATION OF SAID COMPRESSOR MEANS.

Claim 3

Dependent Claim 27 words

The method of claim 1 wherein the temperatures in said secondary combustion space are substantially higher than permissible in said primary combustion space or said compressor means.

Claim 4

Dependent Claim 25 words

The method of claim 2 wherein vaporizing liquids are injected into the clean hot gas streams to moderate the temperatures of said clean hot gases.

Claim 5

Dependent Claim 25 words

The method of claim 1 wherein vaporizing liquids are injected into the clean hot gas streams to moderate the temperatures of said clean hot gases.

Claim 6

Independent Claim 135 words

The method of supplying heat to a heat transfer surface comprising mixing fuel and oxygen-bearing gases in confined spaced, combusting said mixture at a temperature of at least 900* F., to produce hot, high-pressure gases as combustion products, expanding at least a portion of said combustion products in the actuation of compressor means whereby to compress, in at least one compression stage, additional oxygen bearing gases for mixing with additional fuel, delivering the combustion products to nozzles adjacent said heat transfer surface and expanding said combustion products through said nozzles and along said heat transfer surface, whereby to convert a portion of the energy stored in said combustion products as potential energy of pressure into kinetic energy of flow and turbulence at the heat transfer boundary between said combustion products and said heat transfer surface.

Claim 7

Independent Claim 135 words

The method of supplying heat to a heat transfer surface comprising mixing fuel and oxygen-bearing gases in confined spaced, combusting said mixture at a temperature of at least 900* F., to produce hot, high-pressure gases as combustion products, expanding at least a portion of said combustion products in the actuation of compressor means whereby to compress, in at least one compression stage, additional oxygen bearing gases for mixing with additional fuel, delivering the combustion products to nozzles adjacent said heat transfer surface and expanding said combustion products through said nozzles and along said heat transfer surface, whereby to convert a portion of the energy stored in said combustion products as potential energy of pressure into kinetic energy of flow and turbulence at the heat transfer boundary between said combustion products and said heat transfer surface.

Claim 8

Dependent Claim 27 words

The method of supplying heat to a heat transfer surface according to claim 5 wherein said surface is of interstitial structure, and moves in a predetermined path.

Claim 9

Dependent Claim 29 words

A method in accordance with claim 6 and further comprising recycling a portion of said combustion products into the combustion products being delivered along said interstitial heat transfer surface.

Claim 10

Dependent Claim 31 words

A method in accordance with claim 6 and further comprising directing said combustion products in at least one subsequent stage into contact with said interstitial surfaces for further heat transfer thereinto.

Claim 11

Dependent Claim 24 words

The method of claim 6, wherein at least a portion of said combustion products is passed through said interstitial structure by a pressure differential.

Claim 12

Independent Claim 248 words

The method of drying a water bearing material of the kind which degrades at a determinable temperature comprising establishing a path of flow for the material to be dried and moving it through said path of flow at a preselected rate, generating hot high pressure gases in a compression-combustion-expansion cycle, said generated gases initially being at temperatures substantially in excess of the degradation temperature of said material to be dried and at pressures substantially in excess of atmospheric pressure, delivering said hot high pressure gases to a region adjacent said path of flow, expanding said hot high pressure gases in said region to convert a portion of the energy stored therein as potential energy of pressure into kinetic energy of flow, whereby to create hot rapidly movig gases, impinging said hot rapidly moving gases on the material to be dried which is moving through said path of fLow to effect heat transfer between the gases and the material to be dried and mass transfer of water from said material to said gases, said gases being impinged upon said material at a rate preselected in accordance with the rate of movement of said material, its degradation temperature, and the temperature of said gases, said rate being so selected that the equilibrium temperature of said material in the vicinity of said impingement is lower than its degradation temperatures, and displacing the impinged gases after said transfer of mass and heat, by impinging additional hot rapidly moving gases of the material.

Claim 13

Independent Claim 248 words

The method of drying a water bearing material of the kind which degrades at a determinable temperature comprising establishing a path of flow for the material to be dried and moving it through said path of flow at a preselected rate, generating hot high pressure gases in a compression-combustion-expansion cycle, said generated gases initially being at temperatures substantially in excess of the degradation temperature of said material to be dried and at pressures substantially in excess of atmospheric pressure, delivering said hot high pressure gases to a region adjacent said path of flow, expanding said hot high pressure gases in said region to convert a portion of the energy stored therein as potential energy of pressure into kinetic energy of flow, whereby to create hot rapidly movig gases, impinging said hot rapidly moving gases on the material to be dried which is moving through said path of fLow to effect heat transfer between the gases and the material to be dried and mass transfer of water from said material to said gases, said gases being impinged upon said material at a rate preselected in accordance with the rate of movement of said material, its degradation temperature, and the temperature of said gases, said rate being so selected that the equilibrium temperature of said material in the vicinity of said impingement is lower than its degradation temperatures, and displacing the impinged gases after said transfer of mass and heat, by impinging additional hot rapidly moving gases of the material.

Claim 14

Dependent Claim 57 words

A method according to claim 10 and further including the step of cooling said hot high pressure gases to a temperature below the degradation temperature of said material by placing said gases in indirect heat transfer relationship with said material prior to converting them to said hot rapidly moving gases and impinging them directly on said meterial.

Claim 15

Dependent Claim 28 words

The method of claim 10 and further including the step of partially cooling said hot high pressure gases prior to impinging them upon the material to be dried.

Claim 16

Dependent Claim 31 words

The method of claim 12 wherein said partial cooling is effected by placing said gases in indirect heat transfer relationship with said material prior to impringing them directly on said material.

Claim 17

Independent Claim 84 words

The method of supplying heat to a moving heat transfer surface, comprising burning combustible material under such conditions as to generate a gas of combustion at substantially elevated temperature and pressure, the temperature being at least 900* F. whereof the pressure energy is derived at least for the most part form most of the internal energy released from sad combustible material, and utilizing such pressure energy to supply high temperature gas to and directing a rapid stream of said gas against said moving surface.

Claim 18

Independent Claim 84 words

The method of supplying heat to a moving heat transfer surface, comprising burning combustible material under such conditions as to generate a gas of combustion at substantially elevated temperature and pressure, the temperature being at least 900* F. whereof the pressure energy is derived at least for the most part form most of the internal energy released from sad combustible material, and utilizing such pressure energy to supply high temperature gas to and directing a rapid stream of said gas against said moving surface.

Claim 19

Dependent Claim 23 words

The method of claim 14 wherein at least a substantial portion of said gas it utilized as a power stream for jet pumping.

Claim 20

Dependent Claim 37 words

The method of claim 14, wherein said surface is of interstitial structure, including moving said structure across a pressure zone and constraining at least a portion of said gas to pass through said structure in said zone.

Claim 21

Dependent Claim 35 words

The method of claim 14, wherein said surface constitutes one side of a foraminous web, and wherein at least a portion of said gas of combustion is passed through said web by a pressure differential.

Claim 22

Independent Claim 129 words

The method of supplying heat, to a heat transfer surface movable in a predetermined path, comprising burning combustible material under such conditions as to generate a gas of combustion at substantially elevated temperature and pressure, whereof the pressure energy is derived at least for the most part from the internal energy released from said combustible material, and supplying such hot high pressure gas to and directing a rapid stream of said gas against said surface in such manner and in such a direction that at least a substantial component of the force exerted thereby is in the general direction of movement of said heat transfer surface so as to impart to the latter a tendency to move in said predetermined path while at the same time heating said surface.

Claim 23

Independent Claim 129 words

The method of supplying heat, to a heat transfer surface movable in a predetermined path, comprising burning combustible material under such conditions as to generate a gas of combustion at substantially elevated temperature and pressure, whereof the pressure energy is derived at least for the most part from the internal energy released from said combustible material, and supplying such hot high pressure gas to and directing a rapid stream of said gas against said surface in such manner and in such a direction that at least a substantial component of the force exerted thereby is in the general direction of movement of said heat transfer surface so as to impart to the latter a tendency to move in said predetermined path while at the same time heating said surface.

Claim 24

Independent Claim 134 words

The method of supplying heat for heat transfer, which includes producing clean hot pressure combustion gases by mixing fuel and oxygenbearing gases in a confined primary space, combusting said mixture in a temperature range of about 900* to 1500* F.; to produce hot high pressure gases as combustion products, expanding at least a portion of said combustion products in the actuation of compressor means whereby to compress additional oxygen-bearing gases containing most of the available kinetic and flow energy developed by said compressor means, mixing at least a portion of the latter with additional fuel in a secondary combustion space, with combustion at a higher temperature than in said primary combustion space, and delivering the resulting combustion mixtUre from said secondary space with at least said kinetic and flow energy for such heat transfer.

Claim 25

Independent Claim 134 words

The method of supplying heat for heat transfer, which includes producing clean hot pressure combustion gases by mixing fuel and oxygenbearing gases in a confined primary space, combusting said mixture in a temperature range of about 900* to 1500* F.; to produce hot high pressure gases as combustion products, expanding at least a portion of said combustion products in the actuation of compressor means whereby to compress additional oxygen-bearing gases containing most of the available kinetic and flow energy developed by said compressor means, mixing at least a portion of the latter with additional fuel in a secondary combustion space, with combustion at a higher temperature than in said primary combustion space, and delivering the resulting combustion mixtUre from said secondary space with at least said kinetic and flow energy for such heat transfer.

Claim 26

Dependent Claim 34 words

The method of claim 19, wherein said gases containing most of said energy are first delivered to ejector means to admix with at least one other gas before the specified delivery for heat transfer.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1978-11-17	1979-05-19	1979-11-18	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1982-11-17	1983-05-19	1983-11-18	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1986-11-17	1987-05-19	1987-11-18	$7700.00	Window Closed / Lapsed

Method for hot gas heat transfer, particularly for paper drying

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