Showing papers on "Gas heater published in 1993"

Forming method and apparatus

Abstract: The molding apparatus includes a press (10) with a top mold (12) and a bottom mold (14). The top mold (12) has a die (32) with a contoured die surface (34) and gas passages (36). The bottom mold (14) has a die (44) with a contoured die surface (46). The die (44) is made from either a solid piece of material with gas passages or from a porous material. During operation, a workpiece (26) is placed in a mold cavity (24). The mold cavity (24) is closed to shape the workpiece. The workpiece is heated by hot gas supplied by a gas supply and recirculation system (52) when the diverter valves (68 and 70) are opened and gas flows from gas circulation fan (56) to the gas heater chamber (54) to the bottom mold (14), through the die (44), through the workpiece (26), through the die (32) and back to the inlet side of the gas circulation fan (56). When the workpiece (26) has been heated to the desired temperature for the required time, the diverter valves (68 and 70) are closed. When the diverter valves are closed, gas flows through the gas recirculation duct (62) from the gas heater chamber (54) to the inlet of the gas circulation fan (56). The mold cavity (24) is then opened and the workpiece (26) is removed and an unformed workpiece is placed in the mold cavity to repeat the cycle.

Control for a closed cycle gas turbine system

Abstract: A throttle valve having defined characteristics controls flow of gas from a gas heater to a turbine in a closed cycle gas turbine system. The gas heater may be a nuclear reactor fueled by fission material preferably having a negative temperature coefficient of reactivity whereby the reactor automatically ceases heat production upon closing of the throttle valve.

Electronic gas valve power interruption switch

Abstract: An electronic safety circuit for a portable gas heater includes a transformer and half wave rectifier connected in parallel with a fan motor for charging a capacitor, and a solid state switching circuit, which may be either a pair of cascaded transistors, an SCR, or a Darlington switch, for applying a reverse polarity voltage across the solenoid of a solenoid operated gas valve to immediately turn off the gas valve in the event of loss of power to the combustion fan motor. The electronic safety circuit may be conveniently mounted on a PC board and enclosed in the combustion fan motor.

Automatic rice cooker

Abstract: PURPOSE:To change over to a proper heat source, an electric heater or gas heater, which are provided below a rice boiling pan, corresponding to rice boiling condition by providing a heating device which switches the heat sources. CONSTITUTION:This rice cooker 1 which consists of a rice storage tank 3, rice washing device 4 a grain elevator, and a rice cooking pan 5 is provided with an electric heater 53 and gas heater 76 as heat sources below the pan 5, and a heating device 33 which switches each heat source. Rice measured and ejected from the storage tank 4 is carried by the grain elevator and fed into a rice washing cylinder of a rice washing section. Rice is washed while carried crosswise by a crew conveyor in the cylinder and dehydrated in a dehydrating section, and sent to the pan 5. Water for boiling rice is fed and heating and boiling is performed. Rice boiling is performed by changing over to the electric heater 53 or gas heater 76 corresponding to rice boiling condition.

Gas-gas heater protection system and method

Abstract: A system for protecting the material of a gas-gas heater which receives a raw flue gas for being provided to a desulfurization plant for cleaning of the flue gas comprises a path of raw flue gas having a gas temperature which is provided to the heater. A quench device communicates with the raw flue gas flow for providing a rapid cooling of the raw flue gas. A controller communicates with the flow of raw flue gas and the quench device. The controller has a variable, pre-set temperature value which is the temperature at which the material of the heater can be damaged. The controller monitors the temperature of the raw flue gas for detecting when the temperature of the raw flue gas is greater than the pre-set temperature value for activating the quench device in order to provide a rapid cooling of the raw flue gas until the gas temperature is less than the pre-set temperature value.

Direct evacuation gas heater or fireplace and safety release valve for said heaters

Abstract: A direct ventilation gas fireplace having co-linear air intake pipe and gas outlet pipe. The pipes are separated from each other so that the fluid flowing in one pipe does not come in contact with the other pipe. The gas outlet pipe may comprise a safety release valve that allows any excess pressure, in case of explosion, to exit through a lateral spring-actuated door into an enclosure closed around the combustion chamber. This safety release valve allows to build fireplaces having pipes longer than the usual length allowed for respecting specific safety tests in case of gas explosion.

Device for shortening regeneration time of pretreatment adsorber for feed air used for air liquefying separator

Abstract: PURPOSE: To shorten regeneration time by further heating low purity nitrogen for regenerating an adsorber heated by feed air on the outlet side of a feed air compressor of an air liquefying separator. CONSTITUTION: At first, feed air is compressed by an air compressor 1. Then, the compressed air exchanges its heat with low temp and, low purity gaseous nitrogen separated by liquefaction from an air liquefying separator 6 in a heat exchanger 2. The cooled air is sent through a water cooling column 3 to an adsorber 4 in which moisture and carbon dioxide in the air are eliminated and removed. Then, liquefying separation of the air is performed in the air liquefying separator 1. On the other hand, the low purity gaseous nitrogen subjected to heat exchange in the heat exchanger 2 is further heated in a regenerating gas heater 5 and sent to the adsorber 4, and after regeneration is performed there, it is discharged to the outside. In this way, when the adsorber is regenerated, the low purity nitrogen is used as a refrigerant for the heat exchanger. COPYRIGHT: (C)1995,JPO

Gas-heated oil cooking apparatus

Abstract: A gas-heated oil cooking apparatus including a vat (2) with a bottom and side walls (8, 10), a first gas heater (112, 20) arranged in the vat (2) near and above the bottom thereof, and a rear compartment (16) extending over substantially the whole breadth and height of the rear wall (8) of the vat (2). The apparatus further includes a second heater consisting of a heat exchanger (42) arranged substantially in a lower portion of the rear compartment (16), and an opening (141) provided in the lower portion of the rear wall (8) of the vat (2) so that the oil (4) in the vat (2) can fill the lower part of the rear compartment (16), and be further heated by the heat exchanger (42).

High-temperature carbonized gas heater in continuous coke producing facilities

Abstract: PURPOSE:To obtain the subject device suppressing dissipation of combustion heat and adhesion of soot by equipping a heating medium gas-blowing blast part of an upright continuous carbonizing furnace with a combustion space for partially burning a combustible gas, and introducing an oxygen gas conduit for feeding an oxygen- containing gas to the combustion space. CONSTITUTION:Molded coal 2 produced by molded coal producing facilities 1 is thrown from the top of an upright continuous carbonizing furnace 3, heated and carbonized firstly by a low-temperature carbonizing gas 5 sent from a middle part and then by a high-temperature gas 4 sent from the lower part, cooled by a cooling gas 6 and taken out as carbonized coke 8 from a discharging device 7. In the operation, a heating medium gas-blowing blast part 3a of the upright continuous carbonizing furnace 3 is equipped with a combustion space 31 for partially burning a combustible gas, an oxygen gas conduit 28 for feeding an oxygen-containing gas, is connected to the space, the oxygen-containing gas is sent to a circulating gas 14, a combustible gas in the circulating gas is burnt, the temperature of the circulating gas 14 is raised, the gas is used as the high-temperature carbonizing gas 4 and the molded coal 2 is continuously carbonized to produce coke.

Solvent removing device of printing machine drier

Abstract: PURPOSE:To improve adsorption removing rate of a circulating has in a printing machine drier and to reduce exhausted gas volume to outside CONSTITUTION:In a device in which a circulating gas inlet 8 is provided at an upper part of a printing machine drier 7, an exhaust passage 12 of a circulating gas blower 11 connected with an inlet 8 through a suction passage 10 is connected with an circulating gas outlet 9 provided inside of the printing machine drier 7 through a circulating gas heater 13 provided at the exhaust passage 12, and a solvent adsorption removing device 16 is provided at the suction passage 10 via a heat exchanger 15 Total volume of solvent removing gas in the removing device 16 is returned to the circulating gas outlet and, at the same time, heated air line 23 desorbing solvent in the solvent removing device 16 is provided

Antidim observation window

Abstract: PURPOSE:To prevent dew condensation on the outside or testing tank-side surface of an antidim observation window without burning or deteriorating the light transmittance of the glass plate, etc., of the window. CONSTITUTION:The outside glass plate 1, inside glass plate 2, and intermediate glass plate 2 of a testing tank are fixed with a frame 4 and a dry nitrogen gas generated from a nitrogen gas generating device 17 is heated with a gas heater 18. The heated nitrogen gas is selectively made to flow to a outside or testing tank-side space 11 or 12 by switching solenoid valves 19, 20 and 21, or 22. The gas heater 18 heats the nitrogen gas until the temperature of the outside glass plate 1 or inside glass plate 2 becomes higher than the dew- point temperature of the outside 8 or testing tank 7. Therefore, dew condensation on the antidim observation window can be prevented without burning or deteriorating the light transmittancy of the glass plates.

Gas heater for processing gases.

Abstract: A heater (11) for heating processing gases used in semiconductor processing equipment; the heater (11) including a chamber (14) whose walls (17 and 18) are heated by a strip heater (29) whereby gases flowing through the chamber (14) are heated by said heated walls.

Cold/hot water passage switch valve for gas-fired water-heater

Abstract: The valve body has at least four external connecting passages, and the valve core has at least two changing passages and a rotary body In the external connecting water piping system of gas heater, it can effect hot and cold water passage changing instead of the pressent practice with many valves and pipe attachments, thus to simplify mounting of water heater, reduce mounting cost and provide easy operation of the heater

Vapor growing apparatus

Abstract: PURPOSE:To provide a constitution of a vapor growing apparatus for easily controlling a temperature of a substrate only by a substrate heater without influence of a gas heater and maintaining a desired composition without receiv ing heat radiation of the gas heater at a thin film deposited on the substrate in the apparatus having the heater and a substrate heater. CONSTITUTION:A constitution of an apparatus having heat shielding means between a gas heater 71 and a substrate 3, is provided. More particularly, compound gas is introduced into a reaction tank 1 through gas inlet tubes 51, 52 protruding into the tank through the wall of the tank, and a heat shielding plate 9 made of a low thermal conductivity material is arranged at the end face of a gas inlet tube of the heater 71 surrounding the gas inlet tube, or decomposing heat is introduced out of the tank to the end of the gas inlet tube through a thermal conductive rod which is operated as a function of a heat totally reflecting surface on an inner peripheral surface. Further, the substrate side of the plate is covered with a porous electrode plate to apply a high frequency voltage, thereby improving film characteristics.

Desulfurizer for exhaust gas

Abstract: PURPOSE:To operate a dust collector stably while improving the rate of desulfurization by ensuring the temperature of exhaust gas introduced into the dust collector when furnace desulfurization is conducted by lime stone and exhaust gas is further desulfurized by slurry composed of ash recovered from exhaust gas by the dust collector. CONSTITUTION:The subject desulfurizer is provided with a combustion furnace 10, in which furnace desulfurization by lime stone is performed, a flue desulfurizer 20, into which exhaust gas from the combustion furnace is introduced and water 22 is atomized, a gas/gas heater 60 heating exhaust gas from the flue desulfurizer by exhaust gas from the combustion furnace, a dust collector 30 recovering ash in exhaust gas discharged from said gas/gas heater, and a mixer 24 atomizing ash recovered by said dust collector into the flue desulfurizer 20 as slurry.