Showing papers on "Gas heater published in 1981"

Thermal heat storage and cooling system

Abstract: An improved heat storage and cooling system utilizing a conventional solar energy collector as a heat source, a thermal mass of stacked cement blocks with interal horizontally aligned air passageways for warm or cool air storage and a dual-purpose structural wall of staggered hollow cement blocks to generate cool air. The system is self-contained and multi-functional, located either in a fully bermed room adjacent on any side to the area to be serviced or in a basement room embedded in the earth beneath the area to be serviced. The circulation system of metal ducts, pipes, air handler, circulating fan, gas heater and dampers interconnects the solar energy collector, the thermal mass and cooling walls to provide seven modes of operation for the storage of heat or cold and the circulation of warm or cool air as circumstances may require.

Solar/gas heater

Abstract: An instantaneous gas domestic hot water system incorporating a solar heating panel (80) connected to a hot water storage cylinder (81), the outlet from the hot water storage cylinder passing through a heating tube assembly (15) adapted to be heated by a gas burner (13). The outlet from the heating tube assembly is connected to a flow switch (4) and a temperature sensing device (14), the flow switch being connected through an electrical control system (10) to operate a control gas valve (11) and a main gas control (5) to control the flow of gas to a pilot burner (6) which is ignited on sensing of the flow of hot water (3) with the temperature sensing unit (14) controlling the control valve (11) to regulate the flow of gas to the main burner (13) to maintain the water at the water at the outlet (83) at a desired temperature.

Method and apparatus for the gaseous reduction of iron ore to sponge iron

Abstract: OF THE DISCLOSURE Process and apparatus for the gaseous direct reduction of iron ores wherein at least a portion of the spent reducing gas effluent from a reduction reactor is upgraded and thereafter heated and recycled to said reactor forming a reducing gas loop and make-up reducing gas is added to said loop The hot products of combustion, i.e., flue gases, in the reformer are used to heat the recycled gas (and optionally the quenched make-up gas) while maintaining independent control of the operating conditions of the reformer and gas heater to give improved thermal efficiency and fuel savings. The reformer has a stand-by stack through which the reformer flue gas is directed when the gas heater is shut down (to permit independent continuous operation of the reformer).

Method for the gaseous reduction of iron ore to sponge iron

Abstract: Process and apparatus for the gaseous direct reduction of iron ores wherein at least a portion of the spent reducing gas effluent from a reduction reactor is upgraded and thereafter heated and recycled to said reactor forming a reducing gas loop and make-up reducing gas is added to said loop. The hot products of combustion, i.e., flue gases, in the reformer are used to heat the recycled gas (and optionally the quenched make-up gas) while maintaining independent control of the operating conditions of the reformer and gas heater to give improved thermal efficiency and fuel savings. The reformer has a stand-by stack through which the reformer flue gas is directed when the gas heater is shut down (to permit independent continuous operation of the reformer).

Gas exhausting device of heating cooker

Abstract: PURPOSE:To prevent the circumference of a kitchen range from contamination by communicating a suction port provided at the rear part of the kitchen range and a heating chamber with an air exhaust duct with a fan, and providing an air guide which freely enters or leaves the suction port, in the range with a gas heater and the like. CONSTITUTION:A fan 7 is operated with the starting of cooking, and in linkage therewith, an air guide 8 operates a limit siwtch and ascends from an accommodating part 9 until the limit switch stops to cover the upper space of the kitchen range 2. As a result, the exhaust gas A of the kitchen range 2 is pulled by the air guide 8 and flows from the suction port 9 to the exhaust duct 6. An exhaust air C of the heating chamber 1 and a cooling air current B of a table 3 are sucked up into the exhaust air duct 6. With the stop of the fan 7, the air guide 8 is accommodated in the accommodating part 9 by the reverse rotation of a motor (not shown). By this construction, contaminations at the kitchen range are prevented and the space at the upper part of the kitchen range can be utilized effectively.

Gas heater backwash and unburnt gas protector - consists of N-type semiconductor sensor with porous coating damping response

Abstract: A gas heater with a burner (2) and supply valve (7) has a reverse flow protection device in the exhaust return path operating the supply valve so as to rapidly and reliably close it if an exhaust gas backwash or build-up of unburnt gas occurs. This is achieved using an economical reliable device. The reverse flow protector (10) is a sensor consisting of an n-type semiconductor of tin dioxide. The sensor has an insulating coating which is only partially porous for gas. The coating consists of a porous ceramic mass or a fine-meshed metal grid. It ensures that the mechanism does not operate for a transient and therefore permissible build-up or backwash.

Treatment method of exhaust gas containing dust with high electric resistance

Abstract: PURPOSE:To reduce the electric resistance of dusts and enhance the dust collecting efficiency by converting SO2 obtained from a desulfurising apparatus to SO3 and introducing said SO3 into an exhaust gas containing dusts with high electric resistance at an inlet side of an electric dust collector. CONSTITUTION:An exhaust combustion gas 1 from a boiler A is introduced into a denitrification apparatus B to treat nitrogen oxides therein. Subsequently, said gas is introduced into an air preheater C to heat to about 250 deg.C or less and introduced into an electric dust collector D, but, prior to introduction, a SO3 gas is introduced carefully so as to be uniformly diffused. The dusts with electric resistance lowered by the introduction of SO3 is collected efficiently by the electric dust collector D and the exhaust gas issued from the electric dust collector is utilized in a gas/gas heater E to raise the temp. of an exhaust gas generated from an absorbing tower F and the temp. lowered exhaust gas is entered into an absorbing tower F. In said absorbing tower F, a SOx (mainly SO3) component in the exhaust gas is removed by an exhaust smoke desulfurizing method.

Highhtemperature melting treatment

Abstract: PURPOSE:To dry, incinerate and melt high-moisture-content sludge by cumbustion of a small volume of auxiliary fuel oil and to deodorize the dry waste gas, by utiliz- ing the heat capacity of sewerage sludge for drying and melting the sludge CONSTITUTION:Sewerage sludge (dehydrated cake) (a) is dried by a dryer 10, and a gas (c) discharged from the dryer 10 is dehumidified by being passed through a cyclone 11 and a dehumidifying tower 12 And then, heat-exchange is caused to take place in a gas heater 9 between this gas and waste gas discharged from an after-combustion chamber 2 of a high-temperature melting furnace 1, and dehumidified gas (d) is heated and turned into a vapor-carrying gas (e) Major portion of this vapor-carrying gas (e) is led to the dryer 10 to be recycled for re- utilization, and at the same time, a part of surplus gas is introduced into the after- combustion chamber 2 to be deodorized by combustion

Sulfur recovering method

Abstract: PURPOSE:To recover sulfur in a high yield by feeding SO2 gas and a hot gas contg. steam and oxygen to carbonaceous particles to generate hydrogen sulfide, which is then treated with Claus reaction catalyst. CONSTITUTION:Coal granules are thrown in the 1st reactor 1 with feeder 6, SO2 gas of relatively high concn. is introduced into reactor 1 from regenerator 2, and a hot gas contg. steam and oxygen is introduced into reactor 1. The hot gas moves upward while generating water gas by countercurrent contact with the coal granules. Part of the SO2 is converted into vapor sulfur by countercurrent contact with the granules, and another part reacts with the water gas to form hydrogen sulfide. This mixed gas is freed of dust in cyclone 16, scrubbed with liq. sulfur in scrubbingtower 18, and fed to vapor-liq. separator 21 to separage liq. droplets. The gas is then mixed with SO2 gas in mixer 22, heated with gas heater 24, and fed to Claus reactor 27, where it passes through Claus reaction catalyst bed 30. Vapor sulfur is condensed with condenser 35, and recovered sulfur is separated with separator 36.

Radiant for gas heaters

Abstract: A radiant for use with a gas heater embodies a pair of upwardly converging front and rear walls formed of aluminum silicate. Connector members also formed of a fibrous aluminum silicate refractory board extend between the walls to retain their lower end portions in spaced relation to each other. Perforations are provided in the front wall for emitting radiant heat and an upper vent opening is provided in the rear wall. A convexly curved lower end portion is provided on the rear wall for imparting rotary motion to the burning gases as they move upwardly between the walls.

Fluidized reduction method for iron ore by circulation of heat medium particle and reducing gas as well as coal

Abstract: PURPOSE:To utilize coal and oxygen effectively by appropriating the waste gases from a reduction reacting tower and a combustion reacting tower to a circulating gas and a fuel gas for heating the circulating gas at prescribed ratios depending upon the compsns. of the combined gases and the required heating temps. of the reducing gas. CONSTITUTION:The waste gas formed at the top of a reduction reacting tower 1 of a fluidized reducing device is flowed through a connecting path 19 and a cyclone 11 and is joined with the waste gas of a combustion reacting tower 2 in the upper part of the tower 2. These gases are discharged through a waste gas port 13 and are washed and cooled with a gas cleaner 14 and a cooling scrubber 15. A part of the joined waste gases is increased of pressure with a gaseous pressure increasing machine 16, and is converted to a circulating reducing gas through a shift converter 17, and a dehydrating and CO2 removing device 18. This gas is introduced into a circulating gas heater 19. The balance of the above-described joined waste gases are supplied through a conduit 20 into the heater 19, where they are burned by utilizing the air through a conduit 21, whereby the circulating reducing gas is heated. The appropriate ratios of these joined waste gases are regulated in accordance with the compsns. of the joined gases and the required heating temps. of the reducing gas.

Mobile domestic gas heater - has base trolley with locating dowels for burner and rear cover for gas bottle

Abstract: The mobile heater is supported on a base plate (1) running on castors (6) with an edging strip (1c). The gas burner (2) is located on two dowels (1d) across the front of the trolley whilst the gas bottle (4) sits behind the burner. A rear cover (3) fits onto the trolley around the back of the gas bottle and has a lid (5) which completes the enclosure. If necessary or desirable, the components may be separated and the burner fed from the gas bottle at a distance using a longer connecting pipe.

Explosion protected coal pulverising plant - uses protective gas atmosphere for all containers and dust separator for recycled hot drying gas

Abstract: The coal pulveriser uses a protective atmosphere to exclude oxygen to reduce the risk of explosion and combustion . It has a silo for the material to be pulverised and container for transport which are protected by nitrogen. The input silo includes a level control system to ensure a minimum content of material to reduce the possibility of entry of atmosphere or oxygen into the interior. When the coal enters a predryer before grinding, it does not come into contact with an oxygen containing gas mixture. The warm drying gas is discharged from multiple entry positions so that its temp. remains at higher level to ensure an efficient moisture removal. All separated dust is removed by a flotation system. The gas in the water separator is dried, then reheated to pass through distributor valves for return to the drying and pulverising circuit. Between the water separator and the gas heater is an intermediate tank to equalise pressure surges.

Sea water desalting apparatus

Abstract: PURPOSE:To prevent the air pollution as well as to contrive to conserve energy by a method wherein a temp. of an exhaust gas from a combustion apparatus is reduced to a dew point or less and, thereafter, heated and discharged into the atmosphere as well as the waste heat of said exhaust gas is utilized in the sea water desalting. CONSTITUTION:An exhaust gas exhausted from a boiler 1 is supplied to a gas heater 7 through a heat exchanger 5 and a dust collector 6 to heat the exhaust gas discharged into the atmosphere from a chimney 9 as well as heat the sea water pumped up by a pump P3 in a sea water heater 8 and said exhaust gas itself is cooled to a dew point or less of water and SOx to remove moisture and SOx therein. Moreover, said exhaust gas is sent into the gas heater to be heated and discharged into the atmosphere from the chimney. On the other hand, the warmed sea water heated in the sea water heater 8 is supplied into a multistage flash evaporation chamber 10 and heat exchanged with a cold sea water pumped by a pump P4 to form a condensed water and this condensed water is used as water for utility.

Exhaust gas cooling/desulfurizing/reheating system

Abstract: PURPOSE:To facilitate SO3 countermeasure and thus to prevent a dust from sticking in a gas heater by carrying out cooling of an exhuast gas after desulfurizing and reheating up to a temperature high enough to discharge in the atmosphere only by a heat exchange between exhaust gases. CONSTITUTION:An exhaust gas coming out of a coal boiler 11 is cooled down on a front stage gas heater 15-1 by way of a denitrating device 12 and an air preheater 13. The exhaust gas thus cooled is kept dry for mist adsorption effect by dust in a precipitator 14. The exhaust gas is then cooled down on a rear stage gas heater 15-2 and treated on a desulfurizer 16. The exhaust gas supercooled to contain moisture is reheated on the rear stage gas heater 15-2 and the front stage gas heater 15-1 and then discharged in the atmosphere. According to such constitution, the exhaust gas can be treated effectively and also reheated without preparing other heat source particularly therefor.

IC engine by liquefied gas - has gas heater operated from engine exhaust using water circulated by pump

Abstract: The liquified gas is supplied through an expander (D) from the inlet piping (1) to the delivery pipe (2) The gas heater circuit has a water pipe (3) with a heat exchanger (4) mounted around the exhaust pipe (5) The system has an accumulator (8) sealed by a pressure cap (9) The liquid, which may be treated water, circulates via the pump (7) The system allows the gas to leave at a temperature of about 80 degrees centigrade

Waste heat treatment in dry quenching of coke

Abstract: PURPOSE:To effectively recover sensible heat of red-hot coke and simultaneously reduce the time for coal dry distillation, by a method wherein a high-temperature inert gas obtained in the process of recovering sensible heat of red-hot coke is used as preheating gas for raw coal after heat recovery CONSTITUTION:Red-hot coke 11-1 discharged from a coke oven 5 is led into a dry quencher 6 and is quenched Inert gas G-1 heated in a quenching process is subjected to heat recovery in a waste-heat boiler 7, then is adjusted to a temperature lower than the thermal decomposition temperature of coal The inert gas is then used alone or together with combustion waste gas G-7 from the oven 5 in order to dry or preheat G-2 raw coal 1 in an internal-combustion type gas heater 2 The gas G-3, G-4 out of the heater 2 are used to heat a mixer 3 and heavy oil tank 4, then undergoes dehydration and dust-removing treatment in a gas purifier 8, and is circulated to the quencher 6 Meanwhile, the raw coal 1-2 discharged from the heater 2 is mixed in the mixer 3, with heavy oil 9 supplied from the tank 4, is charged into the oven 5 as preheated coal 1-3, and is subjected to dry distillation

Improvements relating to gas heaters.

Abstract: A gas heater comprising a furnace (12) having a roof (12a), means (14a) for firing the furnace, means for feeding the products of combustion from the furnace (12) into a temperature reducing chamber (21) and means (24) to feed products of combustion which has been reduced in temperature in said chamber (21) from said heater.

A Gas/Microwave Combination Oven

Abstract: A gas and. microwave combination oven which has a gas heater, a circulating blower and a magnetron in the same cavity was developed. Hoi-air generated is introduced into the cavity through openings designed to provide microwave cut-off. This oven can be operated simultaneously with both gas and microwaves, which results in a reduction of cooking time and energy consumption as well as provides a wider variety of dishes with improved taste than cooking with either mode alone.

Treatment of sludges by utilizing excessive heat

Abstract: PURPOSE:To dry sludges by utilizing excessive heat by heat-exchanging hot air heated by using excess steam and waste gas generated in the incineration plant with sludges. CONSTITUTION:Wastes are put in an incinerator 2 and burned, and waste gas formed there is discharged through an excess heat boiler 3 and an air heater 4 into a waste gas cylinder 8. Also, sludges are sent through a feed pump 20 to a dryer 15. Drying air is heated by a steam preheater 12 and a gas heater 13 and then sent to the dryer 15 to dry the sludges and then reused as secondary air for the incinerator 2. Thus, the saving of energy or the creation of new energy in the incineration plant can be attained.