Class 432/26 - By mode of admission of treating or protecting fluid

Subclass of Class 432 - Heating
Definition: Process in which the control of the environment is accomplished
No. of patents: 27
Last issue date: 06/05/2007

Number	Title	Issue Date
7225746	Low NOx combustion Combustion of hydrocarbon liquids and solids is achieved with less formation of NOx by feeding a small amount of oxygen into the fuel stream. ...	06/05/2007
7204966	Method and apparatus for improved fired heaters A fired heater is adapted for increasing the output of a plant where the furnace capacity is considerably improved without corresponding increase in the pressure drop. The described technique utilizes a parallel thermal path in contrast to the conventional series th...	04/17/2007
6978726	Combustion with reduced carbon in the ash Combustion of coal in which oxygen is injected into the coal as it emerges from burner produces ash having reduced amounts of carbon. ...	12/27/2005
6367288	Method and apparatus for preventing burner-hole build-up in fused silica processes In furnaces for producing high purity fused silica glass boules, glass particles have a tendency to build-up adjacent the burner hole rim. It was discovered that unburned furnace gases containing silica particles where re-circulated in the furnace close t...	04/09/2002
6276928	Method of retrofitting a furnace to provide oxygen enrichment An oxygen enrichment system is provided which uses the existing air/fuel burners of a regenerative furnace to distribute additional oxygen to the burners for increased efficiency, and reduced nitrous oxide emissions. The centrally positioned cooling air l...	08/21/2001
5189963	Combustible atmosphere furnace control system The operation of a combustible atmosphere furnace is controlled by monitoring the temperature of the combustible atmosphere, and the rate-of-change thereof. The measured rate-of-change is compared to a previously determined safe rate-of-change so as to an...	03/02/1993
4963090	Reverse flow furnace/retort system Reversing the flow of conventional furnace/retort systems prevents damaging exhaust gases from entering the furnace while still maintaining a gas flow through the retort. The gases exit the retort into a treatment system; preventing contamination of any a...	10/16/1990
4597736	Method and apparatus for heating semiconductor wafers A method and apparatus for heating semiconductor wafers characterized by the release of preheated nitrogen into an oven to considerably reduce heating time for the wafers. The oven is evacuated prior to the release of the preheated nitrogen....	07/01/1986
4560346	Method for hardening form substances of building materials containing binding agents and autoclave for the execution of the method The method relates to the hardening of form substances made of building materials and containing binding agents in a pressure chamber of an autoclave to which is conveyed a gaseous heating medium, the temperature of which is increased during a heating-up ...	12/24/1985
4543060	Heat treatment of workpieces A continuous heat treatment furnace has an entrance, a preheat zone, a thermal treatment zone, a cooling zone and an exit. Curtains are provided at the entrance and exit respectively. Nitrogen and hydrogen (or other reducing gas) are supplied to the furna...	09/24/1985
4533439	Apparatus and method of using a fuel gas regulator for a coke oven battery Method and apparatus for the regulation of the flow of fuel gas in the fuel gas supply duct of a heating wall of a coke oven to assure uniform heat distribution in the oven are provided. The regulating means consists of a thin plate having a similar shape...	08/06/1985
4526534	Cantilever diffusion tube apparatus and method A cantilever diffusion tube apparatus includes a quartz cantilever tube having a support end clamped to a laterally movable carriage mechanism and an outer end portion containing a plurality of spaced semiconductor wafers. The cantilever tube is coaxially...	07/02/1985
4490108	Process for reducing the oxygen content of the atmosphere in a heat treatment furnace and heat treatment furnace for carrying out this process A process for reducing the oxygen content of the atmosphere in a heat treatment furnace for ceramic materials to a prescribed value comprises measuring the O2 content of the furnace atmosphere at the point in the furnace to be affected and intr...	12/25/1984
4488871	Process for producing uneven coloring effects on firing plate-like ceramic material For producing uneven coloring on firing plate-like ceramic material such as tiles or flags in a kiln, more specially a roller kiln, made up of preheating, firing and cooling zones, and through whose oxidizing atmosphere in the firing zone the material to ...	12/18/1984
4482316	Insulated atmosphere furnace A heat treat furnace wherein the furnace top and side walls are each defined by an outer, gas-tight metallic structural wall, an intermediate perforate metal plate generally parallel to and coextensive with the exterior wall to define a plenum chamber the...	11/13/1984
4412812	Vertical semiconductor furnace A furnace (100) is provided which aids in the reduction of polysilicon and quartz contaminants during polysilicon deposition on monocrystalline wafers. The wafers are heated for polysilicon deposition within the interior of a quartz tube (102) which is mo...	11/01/1983
4384848	Process and apparatus for firing ceramic materials A process for firing ceramic bodies, in particular tiles, is disclosed, consisting in conveying the ceramic bodies through an elongated heat treatment chamber, both main faces thereof being freely exposed to heat transmission, simultaneously heating said ...	05/24/1983
4244686	Energy saving furnace and method of operating same This disclosure relates to a distinctive construction and method of operating a furnace or oven for controlled atmosphere service whereby substantial savings in heating power or energy are realized. The furnace or oven includes a combination of refractory...	01/13/1981
4219324	Process for treating metals using recycled gases A process is described for treating metals in a furnace by indirect heating techniques, e.g., by using a radiant tube heater, wherein the gas used for heating is passed out of the furnace, treated in a known manner, and passed back into the furnace to ser...	08/26/1980
4208181	Liquid metering and distribution arrangement for rotary reactor Flow control valves are mounted with corresponding axial rows of nozzles about the periphery of a rotary kiln. A metering cylinder is mounted on the kiln and rotates therewith. A piston member is moveable in the metering cylinder in alternately opposite d...	06/17/1980
4191525	Aspiration circulation system and method An improved atmosphere circulation system involving the use of aspirators for inducing turbulence of pressurized atmosphere within a vessel promotes temperature uniformity within the vessel and, for a given degree of temperature uniformity, reduces energy...	03/04/1980
4174951	Furnace heating system A system for heating a furnace having a heating chamber defined by furnace walls is provided with a plurality of individual burner assemblies mounted on a furnace wall to direct heating gas streams into the heating chamber, each of the burner assemblies i...	11/20/1979
4141154	Method for the cooling of a shaft furnace for the calcining of lime, dolomite or magnesite A method and apparatus is disclosed for the cooling of a lime shaft furnace for the calcining of limestone and which is operable with a combustible fuel. In shaft chambers of the shaft furnace, a hollow beam is provided to convey combustible fuel into the...	02/27/1979
4082499	Multipurpose kiln shell gas burner A shell gas burner is provided to preheat a kiln wherein the burner can be also used for process axial air and has provisions for retracting the burner for protection from high heat source or extending the burner for ease of replacement....	04/04/1978
4059395	Device for removing carbonizable residues Device for removing carbonizable residues includes a closed furnace heatable to low-level carbonization temperature, the furnace having an outlet for carbonization gases formed therein, means for burning off carbonization gases from carbonizable residues ...	11/22/1977
4008042	Coal heating temperature control Method for maintaining preheating equipment used for heating coal at a temperature within a temperature range normally used for heating said coal in said equipment which comprises introducing into said equipment a heat-absorbing liquid at a rate sufficien...	02/15/1977
3966560	Method of calcining coke in a rotary kiln In the calcination of petroleum coke in a rotary kiln, procedure wherein air is controllably supplied internally of the kiln to burn the removed volatiles, as by selection or adjustment of the amount of such air and of the speed of coke travel down the ki...	06/29/1976

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Class 432/26 - By mode of admission of treating or protecting fluid