Showing papers on "Gas heater published in 1986"

Design & Operation of a Selective Sweetening Plant Using MDEA

Abstract: The Signalta Resources Forestburg Gas Plant was constructed during the winter of 1983 and placed on stream in April of 1984. A design outlet gas specification of 1/4 grain H/sub 2/S/100 scf was requested to ensure meeting the contract commitment of 1 grain/100 scf. The design gas flowrate was 30 MMSCFD containing 0.5% H/sub 2/S and 3% CO/sub 2/ at 415 psia and 70/sup 0/F. The overall plant is configured as shown in Figure 1. Inlet separation facilities are followed by a feed gas heater. The gas stream then flows through a filter separator followed by the amine contactor. Another filter separator is used as a sweet gas scrubber. After sweetening, the gas is routed to a dew point control refrigeration unit. Finally, a single stage of compression is required to boost the gas to 1200 psig maximum pipeline pressure. The sweetening chemical selected for the Forestburg Plant was methyldiethanolamine (MDEA). This was chosen due to its capability to remove H/sub 2/S and leave a portion of the CO/sub 2/ in the residue gas. At the time of plant commissioning it was one of the first operating MDEA facilities in Western Canada.

Operating method for stack gas treatment device

Abstract: PURPOSE: To make the concn of discharge dust uniform by operating a wet type electrostatic precipitator at the max capacity in the soot-blowing stage and operating the same at the capacity lower than said capacity during the normal operation CONSTITUTION: The performance of the wet type electrostatic precipitator 1 in a method for operating a stack gas treatment device such as waste gas treatment system of a coal firing boiler is preliminarily designed that the peak value of the dust concn in the soot-blowing stage on a heat recovering part 2 side of a gas heater is kept at a specified value or below Said precipitator is operated at the max performance in the soot-blowing stage and is operated at the decreased charge quantity at other times more specifically, a control device 10 receives the operation signal from a soot-blowing device 8, makes command in such a manner that the charge of a power pack 9 attains 100% during the soot-blowing and controls the current value of the power pack 9 in such a manner that the dust concon attains the concn equal to the peak value in the soot-blowing stage of a dust concn meter 7 during the suspension of the soot-blowing COPYRIGHT: (C)1987,JPO&Japio

Heating method of continuous annealing furnace for metallic strip

Abstract: PURPOSE:To prevent the deformation, etc., of nozzles owing to the thermal stress thereof by changing the combustion rate of radiant tubes and changing at the same time the gas flow rate from the nozzle prior to the change of a strip thickness. CONSTITUTION:The fuel supply rate from the combustion burners of the radiant tubes 4 is decreased before the stage of changing conditions in the stage of decreasing a heating rate when the thickness of the strip 1 decreases. On the other hand, the supply of a high temp. gas to a pebble heater 11 is stopped and gaseous NH is supplied from the bottom of the heater 11. The gaseous NH is increased in temp. by contacting with pebbles 10 up to the max. temp. in a short period and such high-temp.l gas is supplied to a plenum chamber 2. The gas heater to the high temp. is supplied gradually by as much as the quantity corresponding to the quantity of heat deficient for heating. As a result, the thermal deformation and breakdown of gas jet nozzles 3 by the effect of high temp. are prevented.

Regenerating method of air thermal evaporator

Abstract: PURPOSE:To surely perform deicing, by allowing gas, evaporated and increasing its temperature by a gas heater, to flow, after the gas passes in a heat transmitting pipe of an evaporator in regeneration for melting ice frozen adhering to an external surface of the pipe, together with gas flowing out from an evaporator in operation. CONSTITUTION:An air thermal evaporator 2' in regeneration, regulating a flow of its deicing gas by a regulating valve V5 from the upstream point of an LNG supply pipe line 4 to be introduced to a heating gas pipe line 7 and evaporating the gas to increase its temperature to a required level by a gas heater 3 using steam and warm water or thermal medium oil, allows the gas to flow into a heat transmitting pipe of the evaporator 2' in regeneration via a valve V'3. The evaporator 2', increasing temperature of a wall of the heat transmitting pipe by the heating gas and melting first frozen ice adhering to the external wall surface of the pipe, exfoliates the ice even if it is not fully melted, regenerating a surface of the heat transmitting pipe.

Unified desulfurizing device

Abstract: PURPOSE:To reduce number of constituent machinery thereby reduce device spacing interposing a heat exchanger at the central portion of the device in which the heater for heating up desulfurizing catalyser to a predetermined temperature and desulfurizing device are unified CONSTITUTION:Raw gas 1 containing sulfuric ingredient is firstly mixed with hydrogen gas 2 for reduction, and then heated up to the active temperature range of desulfurizing catalyser in the raw gas heater 3 positioned at the central portion of a desulfurizing device Heated-up main raw material 4 is sent into a reactor 5 positioned above the annular portion of the desulfurizing device, where sulfuric ingredient in the raw material 4 reacts with hydrogen, that is, the sulfuric ingredient is reduced into hydrogen sulfide The raw material 6 containing the hydrogen sulfide is sent into an adsorber 7, where the hydrogen sulfide is adsorbed The raw material from which the sulfuric ingredient is removed is then sent into a converter 8 With the constitution in which the heater 3, the reactor 5 and the adsorber 7 are unified into one body, the amount of radiating heat is reduced, and since whole the device is assembled into a compact form, the device spacing is also reduced

Steel for exhaust gas economizer

Abstract: PURPOSE:To allow a steel to show superior corrosion resistance in an environment in which an exhaust gas economizer is used by specifying the amounts of C, Si, Mn, Cr, Cu, Ni and Mo in the steel. CONSTITUTION:The composition of a steel is composed of, by weight, 0.03-0.25% C, =about 0.25%. The steel is suitable for use as a material for an exhaust gas economizer, has superior corrosion resistance, is easily welded and causes hardly electric corrosion. The steel can be also used as a material for a boiler, a gas heater, a heat exchanger, etc.

Method of preventing dew point corrosion by sulfuric acid in heat exchanger

Abstract: PURPOSE:To prevent a dew point corrosion by sulfuric acid of a hot temperature heat exchanging panel, extend a service life of the device and improve a reliability in operation of the device by a method wherein a self-contained type heat exchanger is stored in a hot gas part of the gas heater. CONSTITUTION:Heat exchanging panels in a hot gas duct 5 are separately arranged as a upstream side heat exchanging panel 12 and a downstream side heat exchanging panel 13 to form a self-contained and heated heat exchanger. That is, each of the upper headers 12U and 13U of the upstream side heat exchanging panel 12 and the downstream side heat exchanging panel 13 are connected to each other, each of the lower heads 121 and 13L is also connected to each other and a heat exchanging operation is performed at inlet (upstream side) and outlet (downstream side) in the hot temperature gas duct 5 of a gas-gas heater, thereby the surface temperature of the metallic heat exchanging panel can be prevented from being made corrosion and adjusted. In order to make a superior circulation of the medium (normally water) in the heat pipe between the heat exchanging panels, each of the header connection pipes 14U and 14L is inclined by at least a degree of 5 deg. from a horizontal direction and installed. The heat of the discharged gas from the upstream side is utilized to increase the temperature of the downstream side discharging gas and to prevent a condensation of the sulfuric acid.

Removal of low boiling point noxious substance

Abstract: PURPOSE:To remove the low b.p. substance such as mercury contained in the exhaust gas from an incinerator, by the abrupt change in the temp. of gas and the contact (or collision) of the gas with water. CONSTITUTION:In a method for removing the low b.p. substance in the exhaust gas from an incinerator according to an absorbing tower system, a process generating the abrupt change in temp. over 130-250 deg.C and simultaneously contacting water with the gas is performed in two stages. For example, the exhaust gas from the incinerator is guided to a first absorbing tower 1 by a blower while the dust therein is removed by a dust collector. The inlet gas temp. of the first absorbing tower is 200-300 deg.C but cooled to 65-85 deg.C through the contact with a recirculation liquid. The gas after cooling is again heated to 180-250 deg.C by a gas heater 2 and, thereafter, introduced into a second absorbing tower 3 to be cooled so as to bring the outlet gas temp. of said tower to about 40-70 deg.C. The exhaust gas issued from the second absorbing tower is discharged to the atmosphere through a white smoke preventing apparatus 4.

Apparatus for feeding raw material gas for production of optical fiber preform

Abstract: PURPOSE:To feed the raw material gas stably, preventing the condensation of the gas in the tube after the joint part, by bubbling a part of the carrier gas in a raw material tank to form a mixture of the raw material and the carrier gas, heating the remaining part of the carrier gas at a temperature higher than the temperature of the above mixed gas and joining both gas streams CONSTITUTION:Carrier gas supplied through the line 1 is divided into two, and passed through flow controlling devices 2, 3 The stream passed through the device 2 is introduced into the raw material tank 4 and mixed with the raw material liquid 5 in the tank to form a mixed gas, which is sent through the raw material supplying device to the reaction burner of an optical fiber preform producing apparatus The carrier gas stream passed through the flow controlling device 3 is heated with the carrier gas heater 9 to a temperature higher than the temperature of the mixed gas and is joined with the mixed gas at the joining part 10 A mixed gas can be supplied stably with a simple structure

Combustion plate for infrared gas heater having no flame

Abstract: PURPOSE:To promote an oxidation reaction and improve an efficiency of generating an infrared ray by a method wherein a gas oxidation catalyst layer is arranged at one side of a ceramic plate having several gas passage holes therein. CONSTITUTION:A main body B of a burner is provided with a combustion plate A and one side of gas passage holes 1 of the combustion plate A is provided with a gas oxidation catalyst layer 2. The gas entered from the gas injection nozzle 3 is taken out through the gas passage holes 1 and the gas catalyst layer 2. When the mixed gas is ignited, the ignited fuel gas burns with flame. When a ceramic plate having gas oxidation catalyst layer 2 is heated, the gas oxidation catalyst layer 2 may generate an oxidation reaction with the catalyst, the flame is diminished and then the infrared ray may be generated at the part of the gas oxidation catalyst layer 2.

Installation for the treatment of solid residues

Abstract: Solid residues received in a bunker (1) are driven to a hopper (2) with a bag tearing device and are deposited on a conveyor (3) with a device for controlling the maximum height of the residues. Glass is removed on the belt (3) and the remaining residues pass to a hammer mill (4) from which the ground elements are collected by a conveyor (5) passing a suction device (6) removing light materials. The remaining materials continue past an elctromagnet (9) which separates ferromagnetic material. The remaining material mostly organic matter, is introduced into a hopper (10) which feeds pyrolysis reactors by means of a conveyor (11) with a device for ad­ justing the maximum height of the residues. The reactors are connected to a suction line including a gas heater, a tar con­ densor, a water condensor, a chemical gas washing system, and a light solvent separating system. Non-condensable gas is recycled as a combustible gas in the installation.

Gas leakage preventing device

Abstract: PURPOSE:To obviate dangerousness due to a gas leakage, by lighting a red lamp bulb informing that a solenoid valve is opening now and an orange lamp bulb that gas is running, respectively CONSTITUTION:When a switch 14 is turned on after a cable 8 is connected to a power source, lighting of a red lamp bulb and opening of a solenoid valve are carried out simultaneously gas inside an outdoor gas pipe is directly fed to a gas pipe terminal part 17 directly connected to a knob 3 When this knob 3 is turned counterclockwise, a bulge part 4 of the knob 3 moves to the left, making a plastic push rod 6 go back and turning a switch 5 on, lighting each of orange lamp bulbs 18 and 19 and a gas supply to a gas heater from the gas pipe terminal part 17 both takes place at the same time After application, requirement for the closure of a main cock is checked with eyes and a fire and a mortality accident are prevented from occurring before it happens

Gas range cover plate and its manufacturing method

Abstract: PURPOSE:To provide gas range cover plates which can be adapted to a wide range of use at a reduced cost by forming multiple waved ribbs at rounded corners in the inclined side wall. CONSTITUTION:The base material of the gas range cover plate is made of 20mu thick aluminum sheet 10, and its overall plain view is a square with rounded corners 16, 16. There is a hole 13 for gas burner in the center of the bottom 17. The side wall 15 is inclined, expanding to the above, and has no horizontal flange in its upper rim. Since said side wall 15 has multiple waved ribbs 18, 18 in respective rounded corners 16, 16, the ribbs 18, 18 have a bellows-like function, allowing an easy adjustment of inclination angle of the side wall 15. Therefore, even if there is a difference in the size of the gas heater to a certain degree, the cover can easily be fitted to the gas heater by adjusting the inclination angle of the side wall, which is a great advantage for a wide range of use. Further, 10-20 sheet of them can be formed at a time.

Continuous synthesizing device for nonoxide powder

Abstract: PURPOSE:To produce nonoxide ceramic powder industrially and continuously at low cost by connecting an oxidation device for gaseous CO to a gas discharging port of a reaction furnace of nonoxide powder, connecting absorbing devices for CO2 and H2 successively thereto, and circulating nonoxidizing gas generated from the device for use in the reaction furnace. CONSTITUTION:For example, a rotary furnace 1 is used for a reaction furnace. Gaseous mixture consisting of nonoxidizing gas (e.g. N2, Ar) and CO flowing through the inside of the furnace and discharged from a gas discharging port 31 is boosted by a fan 31, then heated in accordance with demand in a gas heater 33 provided with a heater 32, and the heated gas is transferred to an oxidizing zone 5 where Pt catalyst 34 is packed. Necessary amt. of air or O2 for oxidizing CO in the gaseous mixture to CO2 is introduced from a gas introducing port 35. The gaseous mixture consisting of the nonoxidizing gas, CO2, and H2O is fed to an absorbing section 6 packed with molecular sieve 36 where CO2 and H2O are absorbed. The nonoxidizing gas freed of CO2 and H2O is introduced into a rotary furnace 1 from a gas introducing port 39 to the rotary furnace 1.