Showing papers on "Gas heater published in 1997"

Method and apparatus for controlling gas flow to ceramic plaque burners of differing sizes

Abstract: A radiant gas heater includes a first ceramic plaque burner and an adjacent and larger second plaque burner. A valve spindle is movable to establish in series "Low," "Medium" and "High" heat positions by first supplying gas in the vicinity of the first burner, then supplying gas in the vicinity of the second burner while momentarily maintaining the flow of gas to the first burner, next discontinuing the flow of gas to the first burner and finally by reestablishing the flow of gas to the first burner while maintaining the flow of gas to the second burner.

Process and device for producing a CIS-strip solar cell

Abstract: The invention relates to a method of fabricating a strip CIS solar cell and an apparatus for practicing the method. It is the task of the invention to describe a method and an apparatus for providing a technical solution as well as the required layer structure, by which it is possible economically to fabricate adhering CIS solar cells on copper strips. In accordance with the invention the task is solved by a first step of continuously galvanically coating one side of a pre-cleaned copper strip with indium, a second step of very quickly heating the copper strip coated with indium by a contact method with a heated body of graphite and to bring one side into contact with a heated sulfur or selenium containing carrier gas in a narrow gap, a third step of selectively removing by an etching technique the generated cover layer of copper sulfide or selenide, and a fourth step of providing a p + conductive transparent collector or planarizing layer of copper oxide/sulfide. It is a further object of the invention to develop a reactor for practicing the method. The reactor consists of a strip heater made of graphite convexly curved at its gapped surface, a gas heater also made of graphite concavely curved at the gapped surface and quartz glass plates which close a gap set between the strip heater and the gas heater toward the exterior. The strip heater and the gas heater may be separately heated from their interior or their exterior to the necessary process temperatures by radiation heaters.

Single stage and multistage expansion stirling engine expander and stirling cooler

Abstract: PROBLEM TO BE SOLVED: To contrive an increment of specific power and nonpressure promotion by injecting saturated steam into an operating space of a cold side piston in the vicinity where all the operating space becomes minimized, and in the vicinity where the all operating space becomes maximized and at the process scheduled henceforth, emitting internal operating gas and steam from the operating space of the cold side piston SOLUTION: An alpha type Stirling engine by V-shaped two cylinders is equipped with a hot cylinder 1, a cold cylinder 2, a hot side piston 3, a cold side piston 4, a regenerative heat exchanger 5, and an operating gas heater 6 respectively, and in this case, a steam filling port 12 is formed in the upper part of a cold side piston operating space 11 In addition, a lot of exhaust ports 13 and 14 are installed in a side face of the cold cylinder 2 Then, feedwater of a feed water tank 18 is fed to a process coil 21 and steam is generated, then this steam is fed to an injecting steam valve 28 by way of a steam separator 26 Furthermore, at an air suction injector 30, atmospheric air is inhaled and mixed by way of a check valve 32, and this air-fuel mixture is taken into the cold side piston operating space 11 from the steam filling port 12 COPYRIGHT: (C)1999,JPO

Semiconductor wafer heat treatment apparatus

Abstract: PROBLEM TO BE SOLVED: To make feasible of uniform heat teatment as well as various process temperature range by a method wherein the title heat treatment apparatus is provided with heat resistant heaters arranged in susceptors and lamps heating inside of process chamber arranged above a wafer. SOLUTION: The heat treatment process temperature inside a process chamber 21 is maintained by halogen lamps 28 arranged above a wafer 23, heat resistant heaters 29 arranged on susceptors 22 and temperature sensors 30 also arranged on the susceptors 22 so as to set up the heating temperature range of the halogen lamps 28 and the heat resistant heaters 29 according to the characteristics of the temperature sensors 30 thereby enabling the temperature control and the process temperature range to be variously adjusted. Besides, a gas indicator 33 is provided on the sidewall of the process chamber 21 furthermore, a gas heater 34 is provided on the gas feed line of the gas indicator 33 so as to preheat the gas. Through these procedures, various heat treatment processes can be performed while enabling the even heat treatment of large diameter wafers to be performed. COPYRIGHT: (C)1998,JPO

Load locked vacuum processor

Abstract: PROBLEM TO BE SOLVED: To notably cut down the time for mounting specimens on a specimen stage wherein the specimen temperature is stabilized and equalized, by a method wherein either one out of the first or the second heating mechanism or both of them for heating the specimens are provided in a carrier chamber. SOLUTION: A carrier chamber 3 is provided with the first heating mechanism wherein a circulation pipe 10 for heating made of copper is assembled into a holder 11 so as to circulate the liquid or gas controlled at a specific temperature by a liquid or gas heater, so that the temperature of the circulated liquid or gas when carried to a processing chamber may be set up to equalize the specimen temperature with that of the specimen stage 7 in the processing chamber in anticipation of the adiabatic expansion in the vacuum exhausting time. Furthermore, the second heating mechanism equipped with a lamp heater or a nichrome heater corresponding to the first mechanism is provided in the carrier chamber 3, thereby enabling the temperature of the specimens 6 to be set up and stabilized at the temperature of the specimen stage 7 within a short time. COPYRIGHT: (C)1998,JPO

Low-temperature corrosion preventing device for exhaust gas re-combustion type combined plant

Abstract: PROBLEM TO BE SOLVED: To prevent low-temperature corrosion by utilizing the exhaust gas of a gas turbine as boiler combustion air, and providing a heat exchanger utilizing the fluid circulated between a low-pressure gas heater inlet condensate system and a boiler water feed system to transfer heat to the low-pressure gas heater inlet condensate system. SOLUTION: This exhaust gas re-combustion type combined plant is provided with a high-pressure steam turbine 9 driven by the steam from a boiler 5, an intermediate- pressure steam turbine 10 driven by the steam obtained when the exhaust steam is reheated by the boiler 5, and a low-pressure steam turbine 11 driven by the exhaust steam of the intermediate-pressure steam turbine 10. A power generator 12 is driven by these steam turbines 9-11. The combined plant is also provided with a heat exchanger 29 heating condensate on the inlet side of a low-pressure gas heater 7 and a heat exchanger 30 heating feed water at the inlet of a high-pressure gas heater 6. The heat exchangers 29, 30 are connected by a pipe, a heat medium is circulated to increase the inlet condensate temperature of the low-pressure gas heater 7, and the low-temperature corrosion on the heat transfer surface of the low-pressure gas heater 7 is prevented.

Grill gas heater and grill gas cooking equipment

Abstract: PROBLEM TO BE SOLVED: To provide a cooker where heat storing and heat insulating operatings are provided and food is deliciously grilled without the danger of a burn in a gas heater to be used in a roaster and a grill table. SOLUTION: The grill gas heater is provided with an outer case 1 having an opening in a bottom part, an inner case 2 separated from the outer case 1 by a gap 8, heat insulating cylinders 11 and 17 (consisting of vertically bi- seated clayer material such as diatomaceous earth, etc., preferably) internally mounted in the inner case 2, a gas burner 13 arranged in the inner side lower part of the insulating cylinders 11 and 17, a fire grate 19 arranged in the intermediate position of the heat insulating cylinders 11 and 17 and an edge cover 15 which is provided between the upper edges of the outer case 1 and the inner case 2 and is provided with a ventilation holes 25. A stack gas hood is arranged in an upper part at fixed distance. A heat storing material 21 such as lava, etc., is placed on the fire grate 19 and food is cooked in the upper part of it. High temp. is kept inside the cooker, air flowing in the gap 8 and the heat insulating cylinders 11 and 17 restrict the temp. increase of the outer case 1 and the edge cover 15 and air flow coming from the ventilation holes 25 becomes an air curtain so as to restrict the diffusion of smoke. COPYRIGHT: (C)1998,JPO

Process for continuous production of methyl mercaptan

Abstract: A process for continuous production of methyl mercaptan by catalytic reaction of methanol and hydrogen sulfide. Significant improvements in the pretreatment of the feed gas mixture and in utilization of the heat of reaction and the heat content of the product gas mixture. The energy required to vaporize the methanol is derived partly from utilization of the heat of compression of the hydrogen sulfide gas and from the heat content of the product gas leaving the reactor. The heat of reaction is utilized to heat the feed gas mixture to the reaction temperature, with the help of an external gas heater.

Thermal heat treatment method for materials contg. water, esp. foods, e.g. during frying - controls condensation of steam evolved avoiding damage to product by drips, using hot inert gas supply and distribution system

Abstract: Method of thermal treatment is provided, for water-containing goods, esp. foods. The goods are covered by a gas- or vapour blanket during treatment, in the processing space. In this original method, hot gas is so introduced, that the blanket is not disrupted. Also claimed is the use of the procedure in cooking processes, esp. frying of foods. Also claimed is an appts. to carry out the method. This includes: a treatment volume, wall heater, hot gas supply system, gas source and gas heater.

Flue gas treating method

Abstract: PROBLEM TO BE SOLVED: To miniaturize an electrostatic precipitator to make it low costed by a method wherein in that which eliminates dust and sulfur dioxide from a flue gas by using a dry electrostatic precipitator and a wet process line gypsum method desulphurizing equipment, a dust concentration of the flue gas coming out from the dry electrostatic precipitator to be introduced into an absorption tower, is set within a specific range SOLUTION: An untreated flue gas A1 from a coal-fired boiler 1 is at first introduced into an air heater to heat air B to be supplied to the boiler 1 Then, the flue gas A1 is introduced into a heat recovery part 3a of a gas heater, and heat is recovered After cooling, the flue gas is introduced into an electrostatic precipitator 4 Dust is removed from an inside of the flue gas A1, and a flue gas A2 of which a dust concentration is reduced to 100 mg/m N to 500 mg/m is exhausted Then, the flue gas A2 is introduced into a desulfurizing equipment, and sulfur dioxide is removed by absorption Besides, the dust is removed by being collected herein and thereafter, the flue gas is exhausted as a flue gas after treatment A3 The flue gas after treatment A3, after being heated with a reheating part 3b of the gas heater, is released from a stack

Dust removal forecast control

Abstract: PROBLEM TO BE SOLVED: To facilitate a dust concentration control operation by measuring a dust concentration and a liquid/gas ratio and estimating the number of operating circulating pumps based on a previously obtained dust removing performance characteristic curve. SOLUTION: An exhaust gas from a boiler 1 is denitrated by a denitrating device 2, then dust is collected by an electric dust collector 3, and the exhaust gas is heated by a gas heater 4 and desulfurized by a desulfurizing device 5. Further, the exhaust gas is subjected to a dust removing treatment, then is released from a chimney 8 after boosting the pressure and temperatures. The dust concentration is measured by a dust concentration detector 9 at the inlet of the chimney 8. The desulfurizing device 5 is composed of a removed dust absorbing tower 5a, an absorbing liquid 5b, a spray device 5c, a circulating pump 5d and a circulating pump control device 6. An estimated parallel curve is determined based on a measurement value obtained by the detector 9, then the liquid/gas ratio at which the estimated curve is equal to a target dust concentration value is determined. After that, the number of operating circulating pumps 5d for circulating an appropriate absorbing liquid is determined, and the operation is performed using this number of the circulating pumps.

Thermal microsensor with a.c. heating for gas-pressure measurements

Abstract: A method for gas-pressure measurements by means of a micromachined thermal sensor is described. A 0.15 μm thick silicon nitride membrane with dynamically changed dissipated power serves as a gas heater. Theoretical and experimental results of the sensor sensitivity in a frequency range of modulated dissipated power from 20 Hz to 1 kHz are presented. A resolution of 0.2 torr is estimated at atmospheric pressure.

Procedure for distributing sanitary hot water from a gas fired boiler, using a storage vessel and plant for carrying out the process

Abstract: The domestic hot water distribution system from a gas heater (3) comprises a hot water tank (1) equipped with a hot water supply pipe (6) from the heater. The pipe outlet (7) in the upper part of the tank is directed upwards and is a short distance from the tank cover. An outlet pipe (8) takes the hot water discharging in the upper part of the tank to an external tap (12). An admission pipe for cold water comes from the supply pipe (4) to the heater on which is a circulation pump (5). Perforations in the top of the hot water supply pipe in the tank distribute the water into the top part of the tank without turbulence or stratification of the tank hot water.

Catalyst oxidizing method

Abstract: PROBLEM TO BE SOLVED: To reduce the running cost and to improve the safety by oxidation burning the air containing offensive gas and/or a volatile organic composed by an apparatus having heating means and a catalyst reaction chamber, and supplying combustible matter immediately before the chamber. SOLUTION: The air containing offensive gas and/or volatile organic compound is oxidation burned by an apparatus having a heating means 5 and a catalyst reaction chamber 8, and combustible matter is supplied immediately before the chamber 8. The offensive gas means a substrate stipulated by an offensive gas preventing law, and the volatile organic compound means VOC. The apparatus has a pretreating means 2 such as a filter, a preheating means 5 by a heat exchanger, a gas heater 6 using a burner, the reaction chamber 8 having a catalyst, and a posttreating unit 9, and a combustible matter supply means 7 having liquid and gas supply unit is provided immediately before the chamber 8. The catalyst is preferably platinum and/or palladium. The matter is preferably methane, or propane. Thus, even if heating fuel is reduced, offensive substance can be removed, thereby making it possible to reduce NOx.

Mobile de-icer for undercarriage frame

Abstract: A moisture pump (6) and a heater bell (3) are located one behind the other underneath the undercarriage frame (1) or vehicle trailer (14) between the drive wheels (2). Therefore, during forward motion of the de-icer the icing (10) on the ground surface is melted to form condensate (11) and is channeled via a flexible tube (7) into a condensation container (8) by the moisture pump. The heating bell is equipped with gas heater jets (4), the energy source coming from a gas bottle (5). The heating bell can be equipped with alternative heating devices if installed on the de-icer. The condensation container (8) is equipped with a heater lining (9) to prevent the condensate from freezing before being emptied from the container.

Flue gas treating device

Abstract: PROBLEM TO BE SOLVED: To provide a compact flue gas treating device. SOLUTION: In the flue gas treating device for exhausting a desulfrized waste gas from an absorption tower 7 to a stack, etc., with a fan installed on the ground, a lowering duct 16 introducing the waste gas discharged from an upper part of the absorption tower main body 8 to the fan 35 installed on the ground is formed, and a gas heater 15 for rehashing which rehears the deslufurized waste gas discharged from the adsorption tower 7 by using a sensible heat recovered from the waste gas at an upper stream side of the absorption tower 7 is provided inside the lowering duct 16.

Gas heater for high pressure hybrid airbag inflator

Abstract: A gas heater (36) for a high pressure hybrid airbag inflator (10). The inflator includes a main chamber (22) containing a quantity of stored pressurized gas (24). The chamber additionally includes at least one heating device (36) to heat the stored gas. The heating device includes a main body which extends through the housing. The main body has an enlarged section (78) within the housing, and this enlarged section abuts against the housing due to the pressure of the stored gas. This enlarged section thus serves to retain the heater, and to seal the heater to the housing. An initiator (46) is mounted within the heater. Over the face of the heater there is a supported burst disk (60). The inner side (64) of the burst disk is supported against deflection to permit the disk to survive the high pressures within the inflator. The outer (62) side is much less supported, to permit the initiator to more easily rupture the burst disk.

System control device for gas combustion apparatus

Abstract: PROBLEM TO BE SOLVED: To provide a system control device for a gas combustion apparatus in which replacing time of dry cells can be suitably notified beforehand according to the fluctuation of supply voltage at the time of ignition action in the gas combustion apparatus and a safe combustion control can be conducted. SOLUTION: In a gas heater 10 in which dry cells 26 are used in a power source for system control, in the case that an ignition operation is carried out using an igniter 28, if voltage value of the cells 26 becomes lower than a cell replacing notice voltage (2, 2V), the number of times, at which the voltage value becomes lower than the notice voltage, is counted and if the number of times reaches a predetermined number, LED 36 is turned on to announce cell replacing time and if voltage of the cells 26 further drops below OFF voltage (2, 0V) more than predetermined times, combustion is suspended by the controller.

Domestic hot water producing system with a gas heater and method for controlling the temperature of the domestic hot water in such a system

Abstract: of EP0781965The hot water system includes a device (40) measuring the flow (Qecs) of sanitary hot water in the circuit (11,14), and a further device (30) measuring the temperature (Ts) of this water at the output of the heat exchanger (13). A control system (100) controls the modulation valve (20) in response to the detected temperature and a reference temperature (Tc). A module (103) providing proportional control action adjusts the valve (Qecs) adjusting the pulsed flow of gas to the burner, thus providing a continuously adjusted and controlled burner output in response to the measured conditions. The proportional action operates according to a control formula taking account of the flow and temperature measurements, and the known characteristics of the boiler.

Room central heating installation with gas heater boiler regulation method

Abstract: A central heat generator (1), for example a gas-heated boiler, works with a regulating unit (2) for the preliminary temperature. The heating installation is divided into zones (I, II) and each zone has at least one space heater (3, 4; 3', 4') in one or more of the rooms. Each zone is supplied with heating water through a line (5, 5') and possesses a powered adjusting valve (6, 6') or a variable pump. The valve or the pump is controlled by a room regulating circuit (7, 7'), with a required temperature source (8, 8') and a timer (9, 9'), and also a temperature sensor (10, 10'), the room temperature regulator (7) providing a signal for raising the flow temp. of the heat-carrier medium at the heat generator (1,2).

Method and device for decomposing organic matter in gas

Abstract: PROBLEM TO BE SOLVED: To treat a gas containing organic matters at relatively low temperature by guiding a gas containing organic particles, fume or vapor, and excess oxygen into a runway onto which infrared rays are applied to oxidize and decompose the particles. SOLUTION: In a coating step 1, supplied coating material is applied to the surface of a metal 15 supplied to nipping positions of rollers 11, 12. In a baking and exhaust step 2, an infrared ray gas heater 18 is provided and a hood 19 is provided so as to cover a coating metal plate 16 opposed to the heater 18. A coating film on the plate 16 absorbs infrared rays from the heater 18 to effect self heating thereof. On the other hand, a runway 5 of gas containing fume, solvent vapor, and decomposition products is formed in the hood 19. Infrared rays from the heater 18 are applied to the runway 5. Exhaust gas from which organic matters have been removed is discharged to the outside through an exhaust port 21. A cooling water spray nozzle is disposed in a cooling step 3 to spray cooling water on the plate 16.

Floor-installed type dish washing and drying machine

Abstract: PROBLEM TO BE SOLVED: To easily perform the construction of water supply/drain piping or the like for a dish washer/drier by housing the dish washer/drier, whose lateral width is narrower than that of main body, under the gas heater of the main body mounting the gas heater, and arranging the connection part of water supply or drain pipes inside a housing chamber adjacent to the dish washer/drier. SOLUTION: Concerning a main body 1 of a floor-installed type dish washing and drying machine, a built-in type gas heater 2 is attachably and detachably housed at the upper part, for example, a dish washer/drier 3 having the lateral width a little narrower than that of the main body 1 is housed closer to the right or left side under the gas heater 2, and a housing chamber 4 is formed adjacently to that dish washer/drier. Then, a piping space 6 for arranging gas piping 5 for supplying gas to the gas heater 2 is formed under the dish washer/ drier 3 and the housing chamber 4. Besides, the connection part of a water supply pipe 28 for supplying water to the dish washer/drier 3 and a water drain pipe 29 for discharging drainage after washing, etc., is housed in the housing chamber 4. Thus, the construction of water supply/drain pipes or the like for the dish washer/drier can be easily performed.

So3 collection method in waste gas and collection equipment

Abstract: PROBLEM TO BE SOLVED: To provide a method and a device capable of efficiently removing and collecting SO3 while the capacity of an electric dust collector is kept small. SOLUTION: In the collection method of SO3 in the waste gas generated by burning high sulfur-containing fuel, the heat in the waste gas is recovered by passing it through a gas heater 21 and also the SO3 which is contained in the waste gas and condensed on the surface of a heat conductive tube 24 of the gas heater 21 is continuously or intermittently washed away by using washing water when the heat is recovered, and is dissolved into the washing water to recover the SO3 as sulfuric acid.

Process and apparatus for the simultaneous production of coarse ceramic products and combustion gas.

Abstract: of EP0623568The invention relates to a process and the associated apparatus for the utilisation (valorisation) of mixtures of combustible organic substances and clay or carboniferous clay by recovery of a tar-free CO-containing and H2-containing combustion gas and coarse ceramic products (building ceramics) or components. For this purpose, the mixtures shaped into green bodies are subjected in a chamber (1) to heat treatment in a steam-containing reducing atmosphere by direct contact with a steam-containing circulating gas which is circulated and heated before this contact in a circulating gas heater (15, 23). In this heat treatment, there takes place at temperatures of up to 200@C the drying of the green bodies, at temperatures of 200-700@C the pyrolysis of the organic substance and a ceramic consolidation of the green bodies, at temperatures of 700-900@C the gasification of the carbon formed during pyrolysis, a further ceramic consolidation of the green bodies and a leach-proof binding-in of environmentally significant heavy metals which can be completed at temperatures above 900@C.

Process and device for producing a cis-strip solar cell

Abstract: This invention concerns a process and device for producing a CIS-(copper/indium/diselenide) strip solar cell. The aim of the present invention is to describe a production solution and the necessary construction of coatings required to economically produce CIS solar cells which securely adhere to copper strips. That aim is achieved in this invention as follows: in a first step, the pre-cleaned copper strip is continuously galvanically coated on one side with indium; in a second step, the indium-coated copper strip is very quickly heated in a contact process with a heated graphit body and brought into contact on one side with a small slot with a gas vehicle containing heated sulphur or selenium; in a third step, the surface coating of copper sulphide or copper selenide is selectively removed with an etching process; and in a fourth step, the surface of the CIS layer is given a transparent p+- conducting collector coating or adapter coating of copper oxide/sulfide. In addition, the subject of the invention is to develop a reactor to carry out this process. This reactor consists of an arched convex strip heater made of graphite, an arched concave gas heater, also of graphite, and quartz glass tiles which seal to the outside the slot set between the band heater and gas heater. Band heater and gas heater can be separately heated from within or without to the necessary process temperature by means of quickly heating radiant heaters.