Showing papers on "Gas heater published in 1995"

Thermoformable mat mold with hot gas supply and recirculation

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 of the molding apparatus, a workpiece (26) is placed in a mold cavity between the top mold and the bottom mold. 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.

Flue gas treatment and device therefor

Abstract: PROBLEM TO BE SOLVED: To lower the smoke dust concentration at the outlet of a bag filter without the danger of corrosion, to make excel in economicity and further to remove harmful substances such as mercury and dioxin in waste gas at the same time. SOLUTION: After waste coal combustion gas is subjected to denitrification treatment, it is introduced into an air preheater 14 to recover heat, and then a precoat agent is added to the cooled waste gas, which is introduced into a bag filter 17 to collect dust. After that, the waste gas is introduced into a recuperator 20a using heat resistant, acidproof synthetic resin tubes of a medium circulating type gas/gas heater such as 'Teflon(R)' tubes and cooled, and then the cooled wasted gas is subjected to desulfurization treatment. After that, the waste gas is introduced into a reheater 26 of the medium circulating type gas/gas heater and reheated and led to a stuck 28. As the precoat agent, at least one selected from the group consisting of powdery active material, powdery active coke, powdery slaked limes, powdery caustic lime, powdery limestone, and fly ash is used.

Gas heater for heating rooms

Abstract: The heater (1) has a burner (2) with gas supply and output connections (5) and a heating body (4). The burner is a ceramic fibre burner. It has a burner casing with gas supply and gas-permeable ceramic fibre plate (12) forming a wall of the casing. The main body of the casing is made from a U-form folded sheet with closing end walls, so that the ceramic fibre plate forms the joining wall at the free ends of the U. These free ends may be made with two steps, one of which forms the support for the ceramic fibre plate.

Wall mounted gas heater with a small sanitary water storage tank

Abstract: A burner (2) heats the central-heating boiler (1) directly. Hot water is continuously available (11) from a boiler heat-exchanger (7), via a small (under 20 1) cylinder (10). If its measured (17) flow exceeds a set value, a two-way valve (5) diverts the radiator circuit (4,3) through a by-pass (12), and, in summer, the burner lights to heat the cylinder make-up water, temperature-regulated at the boiler (15). During idle periods, cylinder temperature is maintained by a local thermostat (16), similarly activating the burner and by-pass. An indirect coil (13) in the latter - opt., a small electric heater - transfers the heat required. The burner does not light for brief or low-volume demands, through repeated draw-offs will initiate reheating as cylinder temperature falls.

Regeneration of absorbing solution

Abstract: PURPOSE:To regenerate an absorbing soln. for polar gas without lowering the output of a plant. CONSTITUTION:The exhaust gas 3 of a boiler 10 passes through a denitration device 11, an air preheater 12, a gas heater 17 and a desulfurizer 13 to be lowered in temp. and subsequently enters an absorbing tower 18 and carbon dioxide in the exhaust gas is absorbed by a carbon dioxide absorbing soln. 6. The absorbing soln. having carbon dioxide absorbed thereinto is sent to a regeneration tower 19 through a absorbing soln. tank 20 while heated by an absorbing soln. heat exchanger 22 to discharge carbon dioxide. The absorbing soln. in the regeneration tower 19 is cooled by the absorbing soln. heat exchanger 22 and further cooled to temp. necessary for absorbing carbon dioxide by an absorbing soln. cooler 24 to be supplied to an absorbing tower 18. The absorbing soln. stored in the regeneration tower 19 is further heated in an absorbing soln. regenerating heat exchanger 25 by the exhaust gas of the boiler 10.

Rotary cylinder ironer with an improved gas heating ramp

Abstract: The smoothing iron consists of a rotary cylinder (10)containing a gas heater bar (18) with a feeder to supply it with a gas/air mixture connected to one end. The bar has graduated holes to allow the gas/air mixture out and an igniter. the holes in the bar are in the form of a series of micro-perforations which ensure that the gas burns mainly inside them to provide heating mainly in the infra-red range. The micro-perforations are made in plates (48) of a ceramic material, mounted in apertures along one flat face of the tube by means of sealing fixings in the form of tongues. The cylinder (10) also contains a bar (20) to recover the products of combustion, situated in its upper zone, close to the point at which the linen is inserted between the cylinder and a series of endless belts (12).

Technological process for recovering afterheat from synthesizing ammonia (methyl alcohol)

Abstract: After heat exchange with high-pressure water heater, out-tower gas heater and high-pressure water preheater, synthetic ammonia or methanol gas at 290-340 deg.C is cooled to 50-60 deg.C. The desalted and deoxidized water at 5MPa or more is heated to more than 250 deg.C by said preheater and heater and the synthetic raw gas is heated by out-tower heater and then passed into synthesis tower. The hot water at more than 5MPa and 250 deg.C is pressure reduced flashed to provide steam and hot water to different processes.

Method for heating fuel cell

Abstract: PURPOSE:To miniaturize a gas heater to reduce the cost of equipment by heating the cathode gas of individual fuel cells one by one at the cold start of the fuel cells together with blowers in a circulation line. CONSTITUTION:A blower 26 and a cathode gas heater 27 are driven with stop valves 34, 36 open and all the other valves closed, to heat the cathode gas of a first molten carbonate fuel cell 11. When heating of the cell 11 is finished, a second molten carbonate fuel cell 12 is heated with stop valves 38, 40 open and all the other valves closed. When heating of the cell 12 is finished, the next fuel cell is heated and then other fuel cells are heated similarly, and finally the anode gas of an (n) molten carbonate fuel cell 1n is heated with stop valves 42, 44 open and all the other valves closed. Since the individual cells 11, 12...1n have their cathode gas heated one by one, a capacity for one cell is sufficient for the capacity of the cathode gas heater 27. The expensive heater 27 can then be miniaturized and equipment cost can be reduced.

Gas heater with burner

Abstract: The gas heater has a burner (8), the temp. of which is monitored. An inadequate supply of gas and air, or a disturbance in inflow or outflow, leads to an increase in the burner flame on the plate (9), thus raising the burner temp.. This is picked up by a temp. regulator (16) which when a critical tamp. is reached, shuts off the gas supply to the burner. Any further excess heating which might lead to impermissible emission of carbon monoxide is thus prevented. The temp. regulator is in narrow thermal contact with the burner plate, and may be set to a switching off temp. which will prevent heat damage to the plate as well as preventing increased CO emission.

Nitrogen-rejection process developed for small fields

Abstract: A nitrogen-rejection process for reservoirs producing 1--50 MMscfd with 10--60% inlet nitrogen content has a successful fullscale commercial installation at the Mist field in Columbia County, Oregon. In the Nitech process, developed and installed by BCCK Engineering Inc., Midland, Texas, the product or sales-gas stream can be delivered at a purity of as low as 2% total inert content if required by local pipeline specifications. It employs a single column and cryogenic separation of methane and nitrogen as the basis of operation. The design keeps equipment requirements to a minimum. The major equipment consists of a molecular-sieve gas dehydrator and associated regeneration gas heater, an aluminum plate-fin heat exchanger, and a single patented process column. Mist has proven that the process will provide successful operation over a wide operating range reflecting various operating conditions. BCCK's NRU cost, uninstalled, for a 10-MMscfd gas stream is approximately $0.18/1 Mscf inlet. When costs are also included for installation and compression, the total cost for the installed facility is between $0.30--0.45/1 Mscf inlet of processed gas.

Structure of air cooler

Abstract: PURPOSE:To construct a power generator in a small size, enhance the low temp. starting characteristics, and reduce emission of the exhaust gas (in particular, in the form of particulate). CONSTITUTION:Suction gas is compressed by a supercharger 1 and supplied to an engine 2 through suction gas passages 3, 3' which are fitted with a suction gas cooler 4. In this suction gas cooling device, a selector valve 5 is furnished in the suction gas passages 3, and the suction gas cooler 4 is connected with one of the branch paths while a suction gas heater 6 is connected with the other branch path, wherein passages 7, 7' supplied with a cooling water from the engine are connected with this suction gas heater 6, and further a controller 8 is furnished which operates the selector valve 5. The controller 8 is equipped with a function to switch the suction gas so that the valve 5 is changed over to the suction gas cooler side when the load is large and to the suction gas heater side when the load remains small.

Electric and gas heater

Abstract: The utility model discloses an electric and gas heater, mainly composed of an injecting pipe, electric heating pipes and a heating plate, wherein, the heating plate is combined with an air mixing chamber, a burner and an electric heating plate into a whole body; the back side of the heating plate is provided with the circular air mixing chamber communicated with the injecting pipe and two annular grooves concentrical with the air chamber; the electric heating pipes are arranged in the annular grooves; the front side of the heating plate is drilled with gas holes which are circularly provided and communicated with the circular air mixing chamber; circular comburant grooves are arranged along the end surfaces of the gas holes to realize the purpose of using two energy sources. The utility model has the advantages of high heating efficiency, capability of realizing three-stage electrothermal temperature regulation, uniform heating of a pot body, convenient operation and convenient maintenance; the utility model is suitable to be sued in cooking ranges.

Molecular beam epitaxial growth system

Abstract: PURPOSE:To shorten the time required for degassing of a trap greatly when a target degree of vacuum is elevated by effecting desorption of gas effectively in a vacuum container and a low temperature trap. CONSTITUTION:The molecular beam epitaxial growth system comprises a vacuum container 1 in which a semiconductor substrate 10 for growing a thin film crystal is placed, a molecular beam cell 3 for irradiating the semiconductor substrate 10 with a molecular beam of element forming the thin film crystal, a substrate heater 9, and a low temperature trap 6 for capturing gas liberated from the inner wall of the vacuum container 1, wherein a circulation means comprising a temperature measuring body 14 for circulating heated gas through the low temperature trap 6, a pipe 15, a compressor 16, a gas heater 17 with an electric heater 17a, and a pipe 18 is disposed in the low temperature trap 6.

Control device for feedwater heater

Abstract: PURPOSE:To prevent a pipe from being damage at a merging point between a steam heater system and a gas heater system by a method wherein amounts of water flowing in a low pressure feedwater heating system and a gas heater system are controlled by a three-way adjusting valve in its distributed state by a load signal of a steam turbine. CONSTITUTION:A low pressure feedwater heating device system is operated such that condensated water is heated with extracted steam of a steam turbine by a low pressure feedwater heater 2, and a gas heater system is operated such that the condensed water is heated with discharged gas of a gas turbine by a low pressure gas heater 3. A three-way adjusting valve 5 is arranged at a branch point between both systems. Then, a load signal of the steam turbine is inputted into a condensed water flow rate control device 6, a distribution ratio of condensed water flow rates in both systems is calculated, a distribution control over the condensed water is carried out by the three-way adjusting valve 5 through a controller 7 so as to cause the condensed water to flow in each of the systems, resulting in that the condensed water is fed to a deaerator 1. With such an arrangement as above, it is possible to prevent a damage of the pipe from being produced at the merging point between the steam heater system and the gas heater system.

Exhaust afterburning type combined plant operating method and exhaust heat recovering system

Abstract: PURPOSE:To effectively use exhaust heat of a combined plant in air-conditioning, hot-water supply, and the like without returning excessive heat amount of a combined plant into a steam turbine cycle by separating a part of exhaust gas in a boiler, and supplying exhaust gas to the system outside a combined plant. CONSTITUTION:Exhaust gas of a boiler 5 is supplied to a high pressure gas heater 6 through a ventilation pipe 70, and heat recovery is carried out by the high pressure gas heater 6 at the time of feed water. Heat recovery is carried out by a low pressure gas heater 7 at the time of condensation, so that exhaust gas of the boiler 5 is cooled to about 100 deg. degree, and exhaust gas is discharged toward the atmosphere through a chimney 8. Especially, a branch pipe 71 for branching a part of exhaust gas of the boiler 5 is provided in the ventilation pipe 70. A heat accompanying supply plane 25 for supplying exhaust heat of boiler exhaust gas to the system outside a combined plant is arranged on one end of the branch pipe 71. It is thus possible to utilize exhaust heat of a power plant for air-conditioning, hot-water supply, and the like effectively without being influenced by the load fluctuation of a plant, improve overall heat efficiency, and reduce environmental pollution due to exhaust heat.

Fluidised bed incinerator

Abstract: The combustion device includes a firing furnace(100) for receiving fluidal materials and combustable solids and sludges from feeding hoppers, a heater connected to a preheating gas heater(201) and a burner(202) to heat the furnace(100), a cyclone(109) for separating and recovering fluidal materials, dusts and pollutants included in exhaust gas from the heater(200), an air pollution preventive unit(300) connected to the cyclone(109) to lower the exhaust heat and remove pollutant dusts, and a smoke stack(400) having a vertical smoke duct. The furnace(100) has within it a firing chamber(101) for incinerating a charge of fluidal materials and wastes and also has on its outer side a heating chamber(102) for indirectly heating the firing chamber(101).

Microwave introduction joint used for gas and power supply method and device

Abstract: PURPOSE:To allow only gas to pass and to prevent microwave from passing by forming a gas piping and a connection port at both edges of a joint body and at the same time mounting a wire net with a mesh much smaller than that of microwave to be used inside the joint body. CONSTITUTION:In a microwave insulation joint 22, a gas piping 1 and connection ports 24 and 24a are formed at both edges of a joint body 23, a wire net 25 with a mesh much smaller than the wavelength of microwave is mounted inside, the microwave insulation joint 22 is mounted to the down-stream side of a microwave take-out device 15 in a gas heater 5, and the microwave insulation joint 22 prevents the microwave by the wire net 25 and allows only gas to pass, thus enabling the wire net in the microwave insulation joint to positively block the microwave and hence preventing the control circuit, etc., of gas equipment from being poorly affected at the down-stream side.

Deodorizing and melting device for thermoplastic plastic

Abstract: PURPOSE:To provide a device which is free from a danger of explosion of cracked and melted gas and can secure safety in operation. CONSTITUTION:A melting furnace 1 possessing a loading port 8 with a lid for a treated matter 30 on the upper part and a discharge port with a lid for a molten matter 31 of the treated matter 30 on the lower part, a gas duct 13 communicating between the upper part and lower part of the melting furnace 1 and forming a circulation path of cracked and melted gas, a gas heater 12 which can be set up a temperature of a heater provided extending from an upstream side to a downstream side of the gas duct 13 at a constant state, a catalytic reaction device 40 provided in succession to the heater 12 and a blower 17 circulating the melted and cracked gas G are provided.

Water heater/feeder controller

Abstract: PURPOSE:To obtain a water heater/feeder controller, preventing the damage of a tube at the joining point of a steam heater systems and a gas heater systems as well as the generation of heat loss of condensed water. CONSTITUTION:A regulating valve, controlling a flow rate by the water level of a deaerator 1 before being branched into a low-pressure water heater/feeder systems and a gas heater system, is arranged and a three-way regulating valve 4 is provided at the joining point of respective systems while a control means 6, distributing and controlling the amount of condensed water, which flows through the low-pressure water heater/feeder system and the gas heater systems, by the three-way regulating valve 4 in accordance with the load signal of a steam turbine, is provided.

Semiconductor device, and method and apparatus for manufacturing same

Abstract: PURPOSE:To provide a semiconductor device, a method and an apparatus for manufacturing the same in which a surface state of a semiconductor substrate and particularly a compound semiconductor substrate can be stabilized, element characteristics and uniformity in its surface can be improved and stabilized. CONSTITUTION:A wafer holder 14 in which a wafer 12 is charged and rotated by a motor 16 is installed in a chamber 10. A gas introducing nozzle 18a for injecting mixed gas is installed on a surface of the wafer 12, and connected to an O2 gas supply source, an N2 gas supply source, an Ar gas supply source through a gas mixer 20, etc. Further, a pure water introducing nozzle 18b for injecting pure water to the surface of the wafer 12 is installed, and connected to a pure water supply source. A gas heater 28a, a pure water heater 28b, a chamber heater 30 for respectively heating mixed gas, pure water, an atmosphere in the chamber 10 are installed, and a wafer temperature, etc., is controlled.