Showing papers on "Gas heater published in 1996"

Gas heater with alarm system

Abstract: A heater including a housing, a heating assembly having a burner, and at least one of an oxygen level detection assembly adapted to distinguish between a relatively normal oxygen level, a relatively low oxygen level and relatively unsafe oxygen, a carbon monoxide sensor and a combustible gas sensor. The heater may also include an indicator adapted to produce at least one of an audible indication and a visible indication in response to a detection of a relatively low oxygen level, a detection of a predetermined level of carbon monoxide, or a detection of combustible gas.

Apparatus for controlling the supply of gas to and heat from unvented gas heating appliances

Abstract: This invention relates to the operation of unvented gas fired appliances and enhances the safety of effectively controlling the flow of gases to an unvented gas heater, such as gas fired fireplace logs, while enabling a thermostat to control the temperature of the heated area by combining a thermocouple for safety and a thermopile for operation of the thermostat.

Gas burner operating method for gas heater

Abstract: The method uses a regulation circuit, receiving an ionisation signal (Ui) from an ionisation electrode, for regulation of the gas/air ratio to provide a required lambda value corresponding to a required ionisation signal value (Uis). The regulation is effected within a limited regulation range (RB), for ensuring acceptable emission levels, the upper limit (Uio) of this range lying below the maximum value of the ionisation signal and the lower limit (Uiu) lying above the dangerous emission level. A cut- out signal for the burner is provided when the ionisation signal is outside the regulation range for longer than a given interval.

Gas fueled heating appliance

Abstract: A gas heater is provided with a combustion status sensor that provides heater performance data to a controller that controls the heater according to the sensor data and stored calibration parameters optimized for the particular heater.

Baking device and method

Abstract: PROBLEM TO BE SOLVED: To provide the baking device and method capable of heat treatment making no difference in on surface heat history by equalizing the on surface temperature of semiconductor wafer in the PEB (Post Exposure Bake) step within the resist step using chemical amplification type resist. SOLUTION: A gas flow rate adjuster 34 and a gas heater 35 are provided in a gas piping system 31 of an inert gas led from the lower part into a processing chamber 11 of a heating part 5a of a PEB device. In such a constitution, a semiconductor device is heated by a heating part provided with a blowout hole 32 blowing out an inert gas from the peripheral part of a heating substrate 12 heating a mounted semiconductor wafer 10 to the surface side of the heating substrate later shifting the semiconductor wafer 10 to the cooling part of the PEB device to be cooled down. Through these procedures, a high integrated semiconductor device can be manufactured.

Fastening and heating device of fuel cell

Abstract: PROBLEM TO BE SOLVED: To reduce the thermal deflection in an excessive operation time, and to heat the cells evenly for a short time, by providing a pair of current drawing-out plates and a pair of insulating plates having a necessary property, and realizing the fastening and the heating while maintaining a soft structure. SOLUTION: To this fastening and heating device 10, a pair of current drawing-out plates 12 contacting to the upper and the lower surfaces of a laminate fuel cell 7; a pair of insulation members 14 contacting to the upper and the lower surfaces of the plates 12; a pair of fastening plates 16 contacting to the upper and the lower surfaces of the members 14; a gas header 18; and a gas heater 20; are provided. And at least to one side of the plates 12, a gas passage 12b communicated to the gas header 18 is formed through a felxible piping 19. The plates 12 which consist of a copper, a stainless steel, or the like have the flexibility and the heat conductivity almost same as a single separator, while the members 14 which consist of a fire- resisting material, a hard heat insulating material, or the like have a sufficient insulating property and flexibility. The thickness of the plates 12 is made two to three times of the thickness of the separator, the surfaces contacting to a battery 7 are finished at a high plane accuracy, and current terminals 12a are formed integrally or welded to the plates 12.

CIS-Bandsolarzelle - Verfahren und Vorrichtung zu ihrer Herstellung

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.

Regulator for gas heater with burner and gas valve

Abstract: The burner (2) conveys gas via a gas valve (5) and air via a blower (4). A sensor for the flames sends a control signal to a regulating circuit (8) which controls the position of the gas valve and the speed of the blower. The regulating circuit first opens the gas valve with a gas mains pressure (D) falling during the burner's operation, and when a maximum opening position is reached and the gas mains pressure drops, reduces the blower's rotary speed.

Exhaust gas treatment method and apparatus

Abstract: PROBLEM TO BE SOLVED: To provide an apparatus capable of efficiently and economically treating heavy oil combustion exhaust gas emitted from a heavy oil burning combustion equipment and plan compact construction of the apparatus, reduction of consumption of chemicals, retardation of corrosion and prevention of both deterioration of performance and clogging caused by dust. SOLUTION: After heavy oil combustion exhaust gas has been subjected to denitrification treatment, the exhaust gas is introduced into an air preheating device 14 to recover heat, and then exhaust gas from which heat has been recovered is introduced into a heat recovery device 20a made of a heat-resistant acid-resistant synthetic resin made tube of a medium circulating type gas/gas heater 18a, e.g. Teflon tube heat recovering device, to be cooled, and then the cooled exhaust gas is introduced into a dust collector 16 such as a dry electrostatic precipitator, a bag filer and the like to be subjected to dust removing treatment and the dust removed exhaust gas is subjected to desulfurization treatment before being introduced into a reheating device 26 of the medium circulating type gas/gas heater to be reheated and guided into a flue 28. An interior of the heat recovery device 20a of the gas/gas heater 20 is divided into a plurality of partitions parallelly with gas flow and purified water supply pipes are respectively connected with the partitions to periodically wash the heat resistant/acid resistant synthetic resin pipe with water. COPYRIGHT: (C)1997,JPO

Washing apparatus for gas gas heater

Abstract: PURPOSE: To provide a washing apparatus for a gas gas heater which can clean a heat transfer tube for heat recovery transfer without lowering the temperature of the heat transfer tube for heat recovery during the operation of the apparatus nor lowering heat exchange efficiency. CONSTITUTION: In a gas gas heater in which a heat transfer tube 3 for heat recovery is arranged in an exhaust gas duct 2 to perform a heat exchange with an exhaust gas. A multiple system of heat exchanger tubes 3 are arranged parallel in the exhaust gas duct 2 and spray header pipes 4 for spraying several lines of washing water at an upper part thereof parallel in the direction the same as that of the heat transfer tube 3 for heat recovery and a heat medium circulation control valve 5 is connected to each of inlet/outlet parts of the heat transfer tube 3 for heat recovery. Washing water control valves 6p, 6g and 6r are connected to respective stray header pipes 4. This enables cleaning of the heat transfer tube 3 for heat recovery maintaining a better heat exchange rate between the exhaust gas and the heat medium.

Method and apparatus for drying closed-type washer

Abstract: PURPOSE:To provide a method and apparatus for safely drying a matter to be dried having volatile combustibles adhering thereon at a low energy consumption and at a low equipment cost. CONSTITUTION:A matter to be dried 2 is placed within a closed washer 1 which has been washed by using a solvent. Gas is circulated by means of a circulation a 6 through a drying circulation system composed of the washer 1, a line 22, a heat exchanger 3, a condenser 4, a liquid separator 5, a line 23, a heat exchanger 3, a fan 6, a line 24, a gas heater 7 and the washer 1 in order to dry the matter to be dried. The solvent condensed in the heat exchanger and the condenser is separated and recovered from the liquid separator 5, a line 25, a liquid-liquid separator 13 and a line 26 and recycled to a washing process. When gas has increased within the system during a drying process, a valve 15, an exhaust fan 8, a gas holder 11 and a valve are opened to atmosphere so that the pressure within the circulation system is kept at a pressure of at most -30mmH2O in order to prevent gas leakage from occurring. When the gas decreases within the circulation system, the gas is returned from the gas holder through the fan in order to prevent air from permeating the system.

Sludge drying, incinerating and melting treatment system and combustion and melting treatment method thereof and differential pressure control system

Abstract: PURPOSE: To dry and burn moisture in sludge safely without providing any public pollution, smoothen the smelting of molten ash, facilitate the outflow of the same, permit the regulation of solidifying and granuating after outflow, and contrive reutilization. CONSTITUTION: A dryer 1, drying by inert gas, a sludge burning and melting furnace 11, burning organic substances in sludge and melting inorganic substances, are provided while a smelt take-out port 78 is provided on the bottom of the furnace 11. A sludge drying, burning and melting treatment system is provided with a paper extracting line, provided in a sludge recovering seal tank, a secondary combustion furnace 20, burning unburnt organic substances completely, a drain injection nozzle 23, faced toward the inside of the furnace, the main body 25 of convection heat transfer unit, the storage tank 61 of inert gas for drying, a drying medium gas heater 28, provided on the half way of an inert gas supplying passage from the storage tank 61 to the dryer 11 and arranged in the main body 25 of convection heat transfer unit, and an exhaust gas scrubber 38, removing public pollutant contained in the exhaust gas of combustion, which is discharged through the main body 25 of convection heat transfer unit.

Device for removing lubricant in liquefied gas

Abstract: PURPOSE: To effectively remove lubricant contained in liquefied gas by packing a packed bed with which the liquefied gas is brought into contact with active carbon in which the diameter of narrow pores and the ratio of the volume of the narrow pores to the total narrow pore volume of the packed bed each have specified values CONSTITUTION: A packed bed with which liquefied gas is brought into contact is packed with active carbon in which the diameter of narrow pores thereof is in the range of 50-500 angstrome and the ratio of the volume thereof to the total narrow pore volume of the packed bed is >=5% LP gas containing lubricant enters an adsorption tower 10A from a LP gas introducing line 22, and comes into contact with the active carbon to adsorb and remove the lubricant, and is discharged from a LP gas discharge line 26 On the other hand, steam or gaseous nitrogen is heated by a regenerating gas heater 30 and fed into an adsorption tower 10B from a regenerating gas introducing line 28 The active carbon which has adsorbed the lubricant in the adsorption tower 10B is deprived of the lubricant by bringing the regenerating gas of high temperature into contact with it, and the regenerating gas is cooled by a cooler 31 and is discharged from a drain withdrawal line 36 as mixed drain of condensate (or gaseous nitrogen) and the lubricant

Heat treating apparatus

Abstract: PURPOSE:To provide a heat treating apparatus, wherein the formation of an oxide film on a wafer is prevented, and the temperature distribution in a core tube is made uniform with the flow rate of gas flowing in the core tube being suppressed to the low value. CONSTITUTION:A heat treating apparatus 10 has a core tube part 12, a circulating line 14, an electric-furnace gas heater, a fan device 18, a water cooling type gas cooler 20 and gas introducing devices 22 and 23. The core tube part 12 comprises an inner tube 29 and an outer tube 35. The respective part is constituted of the main body having the opening part and the cap part, which is coupled with the opening part. The main bodies and the cap parts of the inner and outer tubes have the introducing pipes having the closing valves or exhuast pipes, respectively, and linked to the gas introducing system and the gas exhausting system of the circulating path having the closing valves. Many obstruction plates 40 are arranged on the inner wall of the inner tube separately in the longitudinal direction and the circumferential direction in the zig-zag pattern. After a wafer is contained, the gas is replaced with inert gas Linking with the core tube path is performed, and the inactive gas is circulated. The inactive gas is heated, and the wafer is heat-treated. The inactive gas is cooled, and the gas is changed into O2, and H2. Thus an oxidizing apparatus can be obtained.

Heat exchanger and scrubbing system for flue gas

Abstract: In the appts, a raw gas cooler (8) supplies cool gas (aROG) to the gas scrubber (5) This enters the scrubber low over its sump (11) Behind the scrubber, a gas heater (20) receives the now clean, cool gas (kREG) leaving the scrubber (5) at the top (12) A thermal fluid (25) recirculates in closed circuit, between cooler (8) and heater (20) The raw gas cooler (8) and clean gas heater (20) pref have concentric rings of vertical tube bundle (7, 22) modules (6, 21), of plastic; fastened together Thermal medium flows inside the tubes, gas outside In the clean gas heater (20), the gas (REG) flows down a central shaft (15), which has incoming hot dirty gas (ROG) outside

Combustion flue gas treatment apparatus

Abstract: PURPOSE: To make supplementary water unnecessary at the time of desulfurization of a gas by absorbing and removing sulfur components in a gas, by bringing an object gas for treatment into contact with an absorbing liquid in a desulfurization tower and cooling the absorbing liquid which is brought into contact with the object gas for treatment in the way the water in the gas can be solidified. CONSTITUTION: After a combustion flue gas at high temperature from a boiler 1 is cooled to about 130-140 deg.C by an air preheating apparatus 5, dust is removed from the gas by an electric dust collector 6. The resultant gas is cooled to about 50 deg.C by a first gas heater 7 and then reaches a desulfurization tower 9 of a combustion flue gas desulfurization apparatus 8. An absorbing liquid in a liquid storing tank 11 of the desulfurization tower 9 is circulated through a circulation line 13 with a circulation pump 12 after being sprayed to the tower 9 from a spray nozzle. The flue gas and the circulating liquid are brought into gas-liquid contact mutually and the sulfur component in the gas is absorbed by the absorbing liquid and removed. Since the flue gas is cooled by the absorbing liquid to the temperature at which the water in the gas can be solidified, a part of the water contained in the gas is condensed, so that supplementary water can become unnecessary at the time of desulfurization.

Visible birds-roasting box

Abstract: The utility model discloses a visible bird-roasting box, which comprises a box body, a heater and hanging frame. The box body of the existing bird-roasting box adopts a closed box door; the hanging frame of the existing bird-roasting box can no be moved; the heater of the existing bird-roasting box is heated by electricity or is heated by gas. So the existing bird-roasting box is not convenient. Besides, the quality of bird roasting of the existing bird-roasting box is difficult to ensure. The existing bird-roasting box has a poor commerce valve. The utility model adopts a visible box door; the hanging rod of the hanging frame is horizontally arranged in the box body; the hanging rod of the hanging frame is connected with a motor through a driving device; an electric heater and a gas heater are respectively arranged in the box body. Thereby, the utility model has the advantages of reasonable structure, convenient use and operation, good quality of bird roasting, etc. Besides, the utility model also has commerce valve and is easy to be accepted by consumers.

Preventing device of backflow of high temperature gas

Abstract: PURPOSE: To avoid that a high temperature gas staying in a heat exchanger part is forced back to flow backward and thereby to prevent damages of a gas turbine and others from occurring by a construction wherein an exhaust means having a structure wherein the high temperature gas is exhausted outside a system by a funnel effect produced by a temperature difference from the atmosphere is provided in the ceiling part of a duct of a damper CONSTITUTION: In an exhaust gas dust of a gas turbine 7 wherein a heat exchanger 6 heating exhaust gas and a damper 1 intercepting combustion exhaust gas at the time of stop of an operation are provided in an exhaust gas outlet duct 5 of a combustion apparatus such as the gas turbine 7, a high temperature gas remaining in the duct on the front flow side of the damper 1 and in the heat exchanger 6 is prevented from being forced back to a combustor by a gas flow leaking from the rear flow side of the damper 1 closed into the duct on the front flow side at the time of stop of the operation of the combustion apparatus As a means for preventing this backflow, a preventing device of backflow of the high temperature gas which is installed in the duct 5 between a gas heater 6 and the damper 1 and constructed of gas vent valves 3 and 4 and a seal air valve 2 is provided

Temperature controller for exhaust gas in boiler equipment

Abstract: PURPOSE:To enable suppressing an increase in the concentration of SO3 accompanying elevation in temperature of the exhaust gas from the combustion and an increase in the proportion of SO3, in the exhaust gas passed though an air preheater so that corrosion of the equipment, such as a gas heater, located on the downstream side of an electrostatic precipitator can be prevented. CONSTITUTION:An outside air-drawing line 14 with an intake 13 opening outside a boiler chamber 2 is connected at a suitable point on the upstream side of a forced draft fan 5 in a combustion air-feeding line 3. An outside air-drawing damper 15 is provided at an intermediate point in the outside air-drawing line 14. In the combustion air-feeding line 3 a boiler chamber air-drawing damper 16 is provided at an intermediate point on the upstream side of the connection point of the outside air-drawing line 14.

Gas heater with water storage reservoir

Abstract: The water heater has a rectangular section heater unit (2) fitted with a gas burner (13) in its lower part. The heater is inside the square section water reservoir (3), mounted on the floor of the reservoir. The cold water at the bottom of the tank circulates by convection over the heater walls, and a hot layer forms at the top of the tank. The flue gases pass over a transverse finned tube (6) that allows water to pass through. The front face of the reservoir carries controllers and temperature detectors (25,26,27) and water level detectors (21,22) set at different levels to perform instrumentation, regulation and safety functions.

Gas flow rate controller in desulfurization device

Abstract: PURPOSE: To provide a device enabling capable of preventing an untreated exhaust gas containing a sulfur component from being discharged from a channel to the atmosphere via a desulfurization bypass line, in the case that a desulfurization bypass damper is opened at the time of damage to a gas heater and a mist eliminator, etc., of the desulfurization device. CONSTITUTION: In the case that the desulfurization bypass damper 9 is opened, a desulfurization gas flow rate 28 detected by a desulfurization gas flow rate detector 29 is always increased by a required quantity more than a discharge gas flow rate 26 detected with a discharge gas flow rate detector 27 by adjusting the opening degree of a desulfurization ventilator gas flow rate controlling damper 7.

Exhaust gas processing method and device thereof

Abstract: PURPOSE: To provide a exhaust gas processing method and a device which is free of corrosion and capable of reducing the concentration of soot at the outlet of an electric dust collector and excellent in economical performance. CONSTITUTION: Coal combustion exhaust gas, after it is denitrified, is introduced into an air preheater 14 where the heat is collected. Then, the cooled exhaust gas after the heat collection is introduced into a pulse charge type electric dust collector 16a and the dust is collected and then introduced into a heat collector 20a made of a heat resistant and acid proof synthetic resin-made tube, for example, a teflon tube and cooled. Then, the cooled exhaust gas is denitrified, and then it is introduced into a reheater 26 of a medium circulation type gas heater and reheated and introduced to a stack 28.

Method and device for treating waste

Abstract: PURPOSE: To contrive the realization of thermal decomposition by direct heating system, which is capable of effecting the thermal decomposition of waste properly and safely and recovering reusable things unoxidized from the residual substances of thermal decomposition CONSTITUTION: A part of low-temperature dry distillation gas, produced by the thermal decomposition of waste in a thermal decomposition reactor 1, is guided into a low temperature dry distillation gas heater 13 by a low-temperature dry distillation gas branching pipe 14 The low-temperature dry distillation gas heater 13 is provided in a flue 11 for guiding combustion waste gas discharged out of a melting furnace 5 Heat exchange between the combustion waste gas and the low-temperature dry distillation gas, guided by the low-temperature dry distillation gas branching pipe 14, is effected indirectly in the low-temperature dry distillation gas heater 13 In this case, the low-temperature dry distillation gas, heated to 500-600 degC, is returned into the thermal decomposition reactor 1 by a low-temperature dry distillation gas returning pipe 15 The returned low-temperature dry distillation gas is introduced directly into waste in the thermal decomposition reactor 1 to serve as the heat source of thermal decomposition of the waste According to this method, thermal decomposition by self-supplying direct heating system can be effected while keeping reducing atmosphere in the thermal decomposition reactor 1

Non-polluting treatment of industrial waste containing chlorine

Abstract: PURPOSE:To make industrial waste contg chlorine non-polluting by separating materials contg chlorine from the industrial waste, then adding these materials into a melting and refining furnace which utilizes electric energy, thereby melting and refining the materials CONSTITUTION:An electrode seal 63 is disposed in the spacing between a furnace cap 4 and an electrode 6 A furnace body section 2 and this furnace cap 4 are air-tightly maintained from each other by a water sealing device 41, etc A tunnel-shaped scrap charging port 8 is disposed and the leakage of in- furnace gases is prevented by double doors 82, 84 Further, a flue 14 for introducing the in-furnace gases into a secondary combustion chamber 16 is connected to the furnace cap 4 A mist separator 28, a gas heater 30, a bag filter 32 and an active carbon adsorption device 34 are disposed in a waste gas treating system to remove the gaseous chlorine, dioxine, etc, in waste gases On the other hand, a waste water filter 20, an active carbon adsorption device 22, a neutralizing vessel 24 and a thickener 26 are disposed in a waste water treating system to recover cooling water