Showing papers on "Gas heater published in 1985"

Combustion safety device for a gas heater

Abstract: A combustion safety device for the counter-action against oxygen deficiency in a gas heater which is provided with a main burner of the surface combustion type and with an oxygen-deficiency detecting burner of a Bunsen type, in which a primary-air hole of the oxygen deficiency detecting burner is made to communicate with the primary-air supply chamber or distributing chamber of the main burner.

Machine for softening an asphalt road surface

Abstract: A machine for softening an asphalt road surface has a housing with a bottom peripheral wall positionable in engagement with a road surface, a gas heater, ducts for conveying hot gas from the heater to the housing and to the road surface under the housing and for recycling gas from the housing after contact with the road surface to the gas heater for reheating, and a fan for circulating gas through the ducts.

Suction gas heater control device for engines

Abstract: A suction gas heater control device for an engine comprising first detector for detecting when the engine is brought into complete firing, and for providing a signal in response thereto; a first timer coupled to the output of the first detector for continuously providing a first operating signal for a predetermined period of time after a first period of time, the first period of time starting with the beginning of the inputting of a signal from the first detector and ending with the stopping of the signal from the first detector; a second detector for detecting engine temperature and for providing a second operating signal when the engine temperature is lower than a predetermined level; and a judgement circuit means coupled to the first timer and the second detector for providing a signal for operating a suction gas heater, when the first operating signal is applied thereto and when the second operating signal which indicates that at least one of the temperature of the engine is lower than a predetermined level.

Gas shut-off valve for gas burning apparatus

Abstract: PURPOSE:To stop the gas supply at sudden extinguishment and contrive to improve the safety by a method wherein a connecting rod is attracted and moved toward the member which is deformed by magnetostriction at the temperature lower than the magnetostrictive contact point of a magnetostrictive member by the attracting force of a permanent magnet. CONSTITUTION:A good heat conductive member 14 made of aluminum bronze castings is fixed to the one end of a magnetostrictive member 11, then the good heat conductive member 14 is moved to the position where the large quantity of burning heat of a burner is absorbed into the member. The top end part of the good heat conductive member 14 is made to absorb the burning heat, then the member is fixed to a gas heater frame via a fixing pedestal 15. At the sudden extinguishment, the conductive heat receiving quantity of the good heat conductive member 14 is rapidly decreased, the temperature of the magnetostrictive member 11 is lowered to the temperature lower than the magnetostrictive point, then a connecting rod 9 is sucked and moved by the sucking force of a permanent magnet 10, and fixed by pressing a spring 13 to a just before position where a burning gas flow out channel (d) is closed, then the burning gas flow out channel (d) is closed with a gas shut-off valve 8, accordingly, the gas supply is stopped.

Method and device for compressing gas

Abstract: PURPOSE:To reduce operation cost by a method wherein Stirling cycle is utilized to compress gas directly by heat energy. CONSTITUTION:The high temperature section 4 and the low temperature section 5 of a displacer cylinder 1 are communicated throgh a gas heater 6, a heat regenerator 7 and a cooler 8. A displacer piston 2 is provided in the displacer cylinder 1. The low temperature sectin 5 of the dispalcer cylinder 1 is connected to a low-pressure gas source 20 and a high-pressure gas source 21, both of them are out of the sytem, through nonreturn valves 23, 25. When the pressure in the low temperature section 5 is reduced lower than same of the low-pressure gas source 20, the gas is sucked from the gas source 20. On the contrary, when the pressure in the low temperature section 5 is increased higher than the same of the high-pressure gas source 21, the gas is discharged into the gas source 21. The gas may be compressed by repeating such motions.

Vapor trap for liquid metal

Abstract: PURPOSE:To enhance the collection efficiency of vapor by lowering the concn. of sodium at the inlet of a vapor trap, by providing a gas heater, which is constituted by arranging horizontal heater pipes in a multi-stage zigzag pattern, to the inlet side of a trap. CONSTITUTION:Cover gas is supplied to a gas heater 13 to be impinged to horizontal heater pipes 15 arranged in a multi-stage zigzag pattern and a part of mist is vaporized to lower the concn. of mist at the outlet of the gas heater 13. The formed vapor is supplied into a vapor trap 5 and collected by the mesh filler 7 therein. The outlet temp. of the filler 7 is held to about 140 deg.C by a cooler 8 and sodium is discharged in a liquid form.

Inert atmosphere device for melting low-melting metal

Abstract: PURPOSE:To obtain easily an inert atmosphere for melting an oxidative low- melting metal by providing a discharge port in the lower part of a vessel provided with a feed hole for an inert gas in the upper part so that the discharge of the gas and putting-in and-out of an object are made possible. CONSTITUTION:A stainless steel plate 14 on which a low-melting metal S is placed is inserted through a discharge port 5 into a vessel 1. An inert gas heated by a gas heater 3 is fed through the feed hole 2 in the upper part of the vessel 1 and the cold air is discharged through the port 5. The vessel 1 into which the device for heating and melting said metal S can be housed is thus filled with the inert gas. Electricity is then conducted to a heater 12 and the metal S is melted.

Leak detection of heat transfer element for steam type gas heater

Abstract: PURPOSE:To check existence of leak of the heat transfer element due to corrosion or the like without stopping an equipment by a method wherein the inside of the heat transfer element is made negative pressure and the existing concentration of harmful constituents of gas in condensed water is measured. CONSTITUTION:A regulating valve 2, for regulating the amount of steam or condensed water, is provided at the inlet and outlet port of the heat transfer element to make the pressure inside of the heat transfer element negative by regulating the regulating valve 2 in accordance with necessity in order to induce gas containing the harmful constituents through openings in case the openings are generated in the heat transfer element by corrosion or the like. In this case, the pressure inside of the tube panel 1 of the steam type gas heater is made negative one by one by choking the steam amount regulating valve 2 for a given period of time in a constant interval and fully closing a condensed water intercepting valve 3 by the signal of a control box 6 so that no trouble is caused in the temperature rise of exhaust gas. Then, the existing concentration of the harmful constituents in the condensed water is measured in a detector 5 by a signal from a detecting terminal 4, the amount of the harmful constituents resolved in the condensed water is evaluated based on the measured value and, thus, the leak is detected. This kind of check is repeated sequentially with respect to respective panels.

Automatic additional heater for bath

Abstract: PURPOSE:To automatically stop additional heating when an appropriate water temperature is reached, by a construction wherein a temperature detector for operating a stopping means for hot water circulated between a heat exchanger and a bath heater is fitted at such a position that the hot water temperature thereat is made equal to an average hot water temperature obtained by stirring the water contained in a bathtub. CONSTITUTION:In a device for automatically heating a bath by a bath heater heated by a heat source such as a gas heater, the temperature detector 13 is fitted at such a position that the hot water temperature thereat is equal to the average hot water temperature obtained on stirring the water contained in the bathtub. Hot water for heating is circulated in the order of the heat exchanger 2, a pipe 10, a heat-exchanging coil 8, a pipe 9, a tank 1 and the heat exchanger 2 by a circulating pump 3. On the other hand, bath water is naturally circulated in the bath heater 5 to be heated through heat exchange with the coil 8. When an appropriate hole water temperature is reached, it is detected by the detector 13, and a controller 12 operates a shut-off valve 14 to cut off the circulating water, and additional heating is stopped. When the hot water temperature in the bathtub 4 is lowered to a predetermined temperature, this is detected by the detector 13, the valve 14 is again opened, and additional heating is restarted. These operations are repeated thereafter.

Method of regulating during change in kind of gas for gas device

Abstract: PURPOSE:To perform regulation during change in a kind of gas without replacement of a gas nozzle, by a method wherein a nozzle pressure is set through replacement or regulation of a gas pressure regulating member, mounted to a gas passage, so that the same flow rate of gas calculated in terms of calorie is injected through a gas nozzle. CONSTITUTION:In a gas device being a type in which a primary air for combustion is forcibly fed to a burner for a hot air type gas heater, when a kind of gas is varied, the same flow rate calculated in terms of calorie is provided by means of a regulating screw 9a of a governor 9 through regultion of a set pressure. However, if a set pressure is set to a low pressure of about 10mm. H2O when high calorie gas is varied, even if a slight error of about 1mm. occurs to the set value, an error ratio inrelative to a base value is incresed, and thereby a gas flow rate is sometimes widely changed. In which case, mounting of an orifice 11 enables the set pressure of the gas governor 9 to be increased by an amount equivalent to a decrease in the pressure of the orifice 11, and a gas flow rate is substrantially prevented from a change due to even slight unevenness in a set pressure. When low calorie gas is used, the orifice is removed and a plug is placed in an insertion port 12. Regulation during a change in a kind of gas is effected through regulation and replacement of a gas pressure regulating member, and this causes facilitation of a regulating work.

Method of heating, melting and coal conversion

Abstract: A method of heating gases for combustion, operating turbines, and heating of a material and the like comprises the steps of providing a melt deposited in a vessel including two vessel elements and selected from the group consisting of a metal, a slag which is a mixture of metal oxides and nonmetal oxides, and a metal and a slag, supplying coal, air, fluxes and hot flue gases into the melt, passing the flue gases leaving the melt through a gas heater, passing a gas to be heated through one of the vessel elements, circulating the melt between the vessel elements, and supplying the gas which has been heated during passing through the one vessel element, to a gas consumer.