Abstract: In a gasification reactor having a shell, a combustion chamber in the shell, and a burner positioned to direct a carbonaceous fuel mixture into the combustion chamber. A quench chamber within the shell holds a cooling bath into which the hot effluent resulting from the combustion is cooled. A throat communicating the combustion chamber with the quench chamber guides the hot effluent stream toward the bath. A quench ring including a receptacle rim, is positioned beneath the throat to support a water jacketed dip tube which guides the hot effluent into contact with the bath liquid. Liquid coolant is conducted into the water jacket by way of connectable flow passages formed into the rim and the dip tube assembly, and thereafter discharged against the dip tube.

Abstract: The lock container is connected to a reactor, which serves to gasify or to combust solid fuels. The lock container serves to remove ash from the reactor. A pressure of at least 2 bars prevails in the reactor. The lock container is pressurized and pressure-relieved in alternation. The pressure relief line communicates with a filter element, which is permeable to gas and substantially impermeable to solids and is disposed within the lock container. When the lock container is filled to the usual level during a pressure relief, at least one half of the filter element is surrounded by ash. The filter element may be tubular.

Abstract: The slag tap of a gasifier is offset from the geometrical axis. Coalescent, molten, residual ash from incomplete combustion is directed to a hearth where residence time provides further combustion and a reduction in the volume and temperature of the resulting slag. The reduced volume and temperature ash is then directed to a slag tap after which disposal is accomplished by conventional means.

Abstract: The cooling of a stream of hot product gas exiting from an outlet opening of a gasification reactor is made by way of two separate partial streams of cooling fluid such as a cooling gas, vapor or liquid. The first partial stream of the cooling fluid is fed from the outside substantially in a radial direction against an outer layer of the product gas stream. The second partial stream of cooling liquid is fed axially in a counter direction to the product gas stream to impinge against a central portion thereof. In this manner the path of mixing of the product gas with the cooling fluid is substantially shortened.

Abstract: The arrangement for cooling a hot product gas containing adhesive or fusible particles which lose their adhesiveness during cooling, has a reactor for producing the hot product gas, a cooling duct connected with the reactor for the hot product gas, a nozzle ring subdivided into a plurality of chambers mounted adjacent to and communicating with the cooling duct, each of the chambers being structured to introduce a different ring-shaped jet of cooling fluid into the hot product gas in the cooling duct. The different ring-shaped jets are producible with mass and penetration depths according to the mass of a product gas stream flowing in a cooling zone of the cooling duct with injection speeds selected to obtain a predetermined penetration depth. Using different penetration depths for the different ring-shaped jets allows avoidance of baked deposits on the walls of the reactor and cooling duct.

Abstract: Gasifier for combusting a particulated carbonaceous fuel by injecting a stream of the fuel into the gasifier combustion chamber together with a combustion supporting gas. The fuel mixture is burned to produce a usable gas and a particulated residual, both of which are directed into a liquid holding quench chamber. A constricted, frusto-conical throat which conducts the usable gas and particulated residual includes one or more nozzles that open into the throat and serve to direct pressurized jets of a scouring fluid into contact with residual particles which have become deposited on the throat wall, to displace the latter and thereby keep the throat void of such deposits.

Abstract: A gasification reactor which includes a shell, having a combustion chamber in which a carbonaceous fuel mix is burned to produce a hot gaseous effluent. A quench chamber within the shell includes a water bath in which the hot effluent is cooled. A refractory lined constricted throat directs hot effluent into a dip tube which guides the effluent into the bath. A multi-segment quench ring supports the refractory throat, and is communicated with a coolant distributing manifold. A discharge port is provided in the quench ring to impinge liquid coolant against the dip tube guide surface. A multi-segment distribution ring segment is removably independent of the quench ring main segment to facilitate separation of the manifold from the quench ring, without removing support to the refractory throat.

Abstract: A method and apparatus for determining blockage of a coal gasification slag tap by observing changes in the pressure differential across a diaphragm seal located within an annulus formed by a pressurized vessel and a gasifier contained therewithin.

Abstract: An apparatus for cooling a hot product gas, the latter is passed through a tubular zone. The product gas contains particles which, on entering the tubular zone, are tacky, but lose their tackiness through cooling in said zone. Within said zone a cooling gas flow forms a gas wall, which prevents contact between the product gas or the tacky particles contained therein, and one of the fixed walls in the tubular zone. Thus within an outlet connection (2) forming the tubular zone is provided an anular insert (3), which forms a gap (4) with the outlet connection. A cooling gas is blown into this gap counter to the flow direction of the product gas. At the end of the insert, this cooling gas is deflected by the product gas and flows within the insert in the same direction as the product gas and protects the inner wall of the insert from the latter.

Abstract: An apparatus for injecting quench gas (cooled syngas) through an injection ring located around the circumference of the gasifier exit duct and having ports in communication with the interior of said duct to achieve thorough mixing of the gasifier gas with the injected quench gas. Interchangeable rings having different configurations and dimensions of the ports may be used to accomodate various types of coal. The rings may be fabricated in sections for ease of maintenance and replacement.

Abstract: A method for forming a terraced structure in the upper surface of a particulate solid bed, typically oil shale, moving upward through an upflow retort and removing particulate solids from the upper surface, which includes rotating a scraping means comprising a shaft having a plurality of scrapers secured thereto arranged in a vertically spaced-apart relationship and in a radially outwardly-stepped relationship relative to a vertical axis of the shaft.

Abstract: The invention relates to the cocurrent gasification of coal and to a gas generator. The gas generator (11) comprises a vertical sealed vessel, the lower third of which is divided into several identical vertical compartments (12). Coal is loaded at the top (17). The major part of the hot reactive gas under pressure is introduced at the top (18), and the remaining part at lower levels (21, 22). Gas evacuation (24) is stopped from one compartment (12) in turn, gas produced is blown in order to unclog the filters (25, 26) and to loosen the ash, the ash is extracted at the bottom (23) and cold reactive gas is blown countercurrently in order to complete the combustion and to cool the ash. This gas generator enables coal from any source to be used and does not require purification downstream.

Abstract: A device for cooling a stream of hot producer gas exiting from a gasification reactor operating at an increased pressure, includes a set of water spraying nozzles directed against the producer gas stream. Water feeding conduits connected to the nozzles pass through a sealing web provided between the pipe wall structure of the reactor and a separate pipe wall structure of a gas outlet connection piece provided above the discharge opening of the reactor. The geometric locations of respective nozzles are on a circle whose diameter is larger than that of the gas discharge opening and is smaller than the inner diameter of the pipe wall structure of the connection piece.

Abstract: An apparatus and process for control and maintenance of fluidized beds under non-steady state conditions. An ash removal conduit is provided for removing solid particulates from a fluidized bed separate from an ash discharge conduit in the lower portion of the grate supporting such a bed. The apparatus and process of this invention is particularly suitable for use in ash agglomerating fluidized beds and provides control of the fluidized bed before ash agglomeration is initiated and during upset conditions resulting in stable, sinter-free fluidized bed maintenance.

Abstract: An improvement for the structure of a quench ring and dip tube combination. It is applicable to an assembly of those elements on a gasification generator at the outlet thereof. It has a hollow perforated standpipe (48) that will bleed off any accumulation of gas above the cooling water in the quench ring.

Abstract: An apparatus for measuring the ash temperature in a gasifier (10) of the kind described, which includes providing an ash contact member (31) in the ash flow path (20) downstream of the ash outlet (21) of the gasifier, and measuring the temperature of the ash contact member. The invention also provides ash temperature measurement means (30) for the gasifier (10). The ash temperature measurement means includes the ash contact member which is located in the ash flowpath below the ash outlet and which is capable of assuming a temperature proportional to the temperature of ash discharged from the gasification chamber (12) and which comes into contact with the contact member, as well as temperature sensing means adapted to measure the temperature of the ash contact member.

Abstract: A steam supply system is provided for use in conjunction with both a superposed turbine driven by a steam boiler and a process chamber. The steam boiler operates at a pressure above that needed for consumption in the process chamber and uses highly purified water. The process chamber can use steam which has been generated from relatively low purity water and may be any steam consuming process, such as in one embodiment coal gasification, not requiring that the water be returned for re-use as steam. Energy remaining in the high purity steam after it leaves the superposed turbine is used in a condensing reboiler to heat the water into steam for the process chamber. The two fluids are kept essentially isolated from contact with each other in the condensing reboiler, and the high purity water is pumped back to the high pressure boiler in a closed loop system.

Abstract: A fixed bed gasifier for wood or other solid fuel has an air supply grate or grid spanning its interior horizontally substantially above the floor of the gasifier reactor vessel. The air supply tubes forming the grid are widely spaced apart to offer minimal resistance to the downward movement of ash in the reactor vessel. The ends of the grid tubes are supported by stuffing boxes on the side wall of the reactor vessel. An ash removal auger communicates with an ash pit at the bottom of the gasifier reactor vessel and a separately powered rotating ash plow operates in the ash pit above the ash removal auger and below the level of the air supply grate or grid.

Abstract: An assembly for supplying gas-conveyed solid fuel to the interior of a double wall gasification vessel includes a conduit (4) for conducting the fuel-gas mixture across the annular region (16) formed between the inner (3) and outer (2) vessel walls. A flexible coupling (11) is provided at one end of the conduit proximate the penetration of the fuel-gas stream across the vessel pressure boundary. An expansion joint (14), disposed about the conduit (4) and sealed to the inner vessel wall (3) conducts secondary gas into the inner vessel across the annular region (16) and prevents leakage of corrosive gases from the inner vessel interior.

Abstract: Synthesis gas is produced by partial oxidation of hydrocarbon charge, a first portion being cooled by indirect heat exchange and scrubbed before being combined with the quenched second portion en route to particulate scrubbing, the combined gas scrubber overhead being characterized by a desired steam:dry gas ratio which is controlled by regulating the flow of the quenched second portion in accordance with the measured properties of the combined scrubber overhead gas.

Abstract: A cyclic char gasifier plant is described which, from a single gas expander, can produce two or more separated and differing product reacted gases by use of an exhaust divider valve at the expander discharge.

Abstract: A slagging gasifier has a hearth comprising an annular solid cast structure formed from a high thermal conductivity metal such as copper and shaped to fit above a slag tap of the gasifier. The hearth is provided with one or more integrally formed passageways for circulating a coolant liquid therethrough and has an upper tundish surface with a slope of at least 10.degree. to the horizontal (preferably between 25.degree. and 45.degree.), across which tundish surface the molten slag flows downwardly and inwardly towards to slag tap. The annular structure may be formed from at least three sector-shaped cast parts secured together in situ in the gasifier.

Abstract: In order to ensure a comparatively high purification of gas, a gas producer is provided with a gas treatment stage consisting of a water tank having a gas inlet pipe terminating in a vertical section opening upwards under a bell housing floating on the water by means of a floating system provided with annular ribs. The flotation system further includes a projecting flange just above the water surface. Once the gas has passed from beneath the bell housing to an upper part of the tank it is drawn off by a blower and discharged, e.g. to a gas engine. A valve controlled recirculation line is provided between the blower and the upper part of the tank.

Abstract: A fixed bed gasifier has an annular series of spaced pokehole units thereabout, each unit of which is an outwardly and upwardly extending tapered tube with an end closure having an eccentrically positioned hole through which a poker may be inserted to pass through the unit for poking the fire zone of the gasifier. The tapered tube opens the gasifier vessel at the reduction zone. The hole at the end closure is closed when not in use by a movable closure that is opened only when the poker is to be inserted. The movable closure is connected with an air valve that admits atmospheric air from a manifold encircling the gasifier, at a pressure slightly above the internal pressure in the gasifier, to the interior of the unit as the movable closure is operated to expose the hole at the end of the unit, forcing hot gases in the unit back into the gasifier in the reduction zone, and permitting air only to blow out the end of the unit just before the poker may be inserted and until the pokehole is again covered.

Abstract: A partial oxidation control system for continuously producing synthesis gas, fuel gas or reducing gas in which one process fuel is replaced by a different fuel without shutting down or depressurizing the gas generator. Suitable burners for introducing the feedstreams into the gas generator comprise a central conduit means radially spaced from a concentric coaxial outer conduit having a downstream exit nozzle, and providing a coaxial annular passage means therebetween. The central conduit means may be retracted upstream from the burner face a distance of about 0 to 12 and preferably 3 to 10 times the minimum diameter of the central exit orifice. A premix zone is preferably provided comprising one or more, say 2 to 5 coaxial chambers in series where substantial mixing of the reactant streams and optionally volatilization of the slurry medium takes place.

Abstract: Trim control of a partial oxidation gas generator for the production of synthesis gas, reducing gas, or fuel gas is effected by two improved control schemes which are automatically operated separately or in sequence. The control systems include sensors sensing the flow rate of the feedstreams and analyzers which provide signals corresponding to the wt. % carbon in the effluent gas quench cooling and scrubbing water for use in controlling the particulate carbon in the effluent gas stream, and/or signals corresponding to the mole fraction of CH.sub.4 (dry basis) in the cooled and cleaned effluent gas stream for use in controlling the temperature in the reaction zone. The signals from the sensors and analyzers are provided to the system control unit which computes values that represent the relative difference between the actual and desired carbon-make and/or the actual temperature in the reaction zone, and the relative difference between the actual and desired temperature in the reaction zone.

Abstract: Trim control of a partial oxidation gas generator for the production of synthesis gas, reducing gas, or fuel gas is effected by two improved control schemes which are automatically operated separately or in sequence. The control systems include sensors sensing the flow rate of the feedstreams and analyzers which provide signals corresponding to the wt. % carbon in the effluent gas quench cooling and scrubbing water for use in controlling the particulate carbon in the effluent gas stream, and/or signals corresponding to the mole fractions of CO.sub.2, CH.sub.4, CO and H.sub.2 (dry basis) in the cooled and cleaned effluent gas stream for use in controlling the temperature in the reaction zone.

Abstract: This invention relates to a two stage coal gasification plant which comprises a gasifier 1 and a predistillation retort 2. The gasifier has a plurality of gas extraction outlets 4 located in the periphery thereof which feed into a manifold 5 from where a percentage of the gas from the gasifier is extracted. Gas from the predistillation retort is extracted through an outlet near the top of the retort. An agitator 8 is provided for agitation of the coal in the agglomeration zone. The agitator is preferably automatically controlled by means of a temperature sensing device 10 located on an arm thereof.

Abstract: An improved air-flow regulator for a fixed-bed coal gasifier is provided which allows close air-flow regulation from a compressor source even though the pressure variations are too rapid for a single primary control loop to respond. The improved system includes a primary controller to control a valve in the main (large) air supply line to regulate large slow changes in flow. A secondary controller is used to control a smaller, faster acting valve in a secondary (small) air supply line parallel to the main line valve to regulate rapid cyclic deviations in air flow. A low-pass filter with a time constant of from 20 to 50 seconds couples the output of the secondary controller to the input of the primary controller so that the primary controller only responds to slow changes in the air-flow rate, the faster, cyclic deviations in flow rate sensed and corrected by the secondary controller loop do not reach the primary controller due to the high frequency rejection provided by the filter.

Abstract: A modulated control system is provided for improving regulation of the bed level in a fixed-bed coal gasifier into which coal is fed from a rotary coal feeder. A nuclear bed level gauge using a cobalt source and an ion chamber detector is used to detect the coal bed level in the gasifier. The detector signal is compared to a bed level set point signal in a primary controller which operates in proportional/integral modes to produce an error signal. The error signal is modulated by the injection of a triangular wave signal of a frequency of about 0.0004 Hz and an amplitude of about 80% of the primary deadband. The modulated error signal is fed to a triple-deadband secondary controller which jogs the coal feeder speed up or down by on/off control of a feeder speed change driver such that the gasifier bed level is driven toward the set point while preventing excessive cycling (oscillation) common in on/off mode automatic controllers of this type.

Abstract: An ash level control system is provided which incorporates an ash level meter to automatically control the ash bed level of a coal gasifier at a selected level. The ash level signal from the ash level meter is updated during each cycle that a bed stirrer travels up and down through the extent of the ash bed level. The ash level signal is derived from temperature measurements made by thermocouples carried by the stirrer as it passes through the ash bed and into the fire zone immediately above the ash bed. The level signal is compared with selected threshold level signal to determine if the ash level is above or below the selected level once each stirrer cycle. A first counter is either incremented or decremented accordingly. The registered count of the first counter is preset in a down counter once each cycle and the preset count is counted down at a selected clock rate.

Abstract: A plant for the gasification of fossil fuels which includes a reactor container and a further plant component attachable to the reactor container. The reactor container has a discharge opening and includes a connection part extending outwardly from the discharge opening. A fireproof lining, which determines the inner cross-sectional area of the container, is provided within the container. An intermediate ring is interposed between the connecting part of the reactor container and the further plant component for attaching the connecting part to the further plant component. This intermediate ring is provided with a fireproof lining having an area of reduced inner cross-section which is less than the inner cross-sectional area of the fireproof lining of the reactor container, the area of reduced cross-section being the smallest cross-sectional area in the connection between the reactor container and the further plant component.

Abstract: In a fluidized bed gasification system an ash removal system to reduce the particulate ash to a maximum size or smaller, allow the ash to cool to a temperature lower than the gasifier and remove the ash from the gasifier system. The system consists of a crusher, a container containing level probes and a means for controlling the rotational speed of the crusher based on the level of ash within the container.

Abstract: A slag breaker of a pressure-type coal gasifier having a rotary grate with a plurality of grate segments, a generator bottom and an ash separator, has an inclined breaking plate arranged to be located immediately below the grate segment and prior to the ash separator and provided with a plurality of breaking projections, and a wear sheet arranged to be located on the generator bottom and provided with a plurality of breaking webs.

Abstract: Solid fuels are gasified in a fixed bed with gasifying agents passed through the fixed bed from below. The gasification residues are withdrawn as solid ash or as liquid slag under the fixed bed. The reactor is charged with solid fuels through a lock chamber and with tar through a supply conduit. The tar is delivered to the fuel in numerous individual streams, which are distributed over the cross-section of the fixed bed.In the gasifying reactor, an inclined distributor surface is disposed over the fixed bed and has numerous passage openings for the tar and the solid fuels. The outlet end of the tar supply conduit is directed to the upper portion of the distributor surface. A tar tub having outlet openings is associated with the distributor surface and serves to receive the tar. The distributor surface is rotatable on a vertical axis.

Abstract: A burner and partial oxidation process for producing synthesis gas, fuel gas or reducing gas from slurries of solid carbonaceous fuel and/or liquid or gaseous hydrocarbon fuel. The burner has a high turndown feature and comprises a central conduit; a central bunch of parallel tubes that extend longitudinally through said central conduit; an outer conduit coaxial with said central conduit and forming an annular passage therewith; and an annular bunch of parallel tubes that extend longitudinally through said annular passage; and wherein the downstream ends of said central and annular bunches of parallel tubes are respectively retracted upstream from the burner face a distance of about 0 to 12 i.e. 3 to 10 times the minimum diameter of the central exit orifice and the minimum width of the annular exit orifice. Three ranges of flow through the burner may be obtained by using one or both bunches of tubes and their surrounding conduits.

Abstract: An improved access port structure for a vessel, such as a coal gassification furnace, in which a closure member is mounted for movement, on the vessel to open or close an opening, a means of providing a steam vortex flowing into the opening to prevent the escape of gases from the vessel, and an interconnection to the steam supply to assure that the vortex is operating prior to the opening of the closure member.

Abstract: A poking system for use in checking the condition of and agitating the contents of a coal gasifier utilizes a carriage (22) for transporting a poker (50) around the gasifier from one poke hole (12) to another. The carriage (22) mounts a poker assembly (24) comprising a tiltable arm (30) controlled by hydraulic ram (36) and the poker is incrementally inserted into and with withdrawn from each pokehole (12) by means of a reciprocable slide (38) provide with poker engaging clamps (60) which are operated during the advance or return stroke of the slide (38) depending on whether the poker is to be inserted or withdrawn. A pyrometer (72) is provided on the arm (30) for detecting, during withdrawal, the location of that portion of the poker (50) which has been resident within the oxidation zone of the gasifier.

Abstract: A high temperature (1000.degree. C. or higher) gas distributor for a fluidized bed, which comprises a pair of refractory supporting bricks which are each provided with grooves at given intervals and which are positioned with a space therebetween in such a manner that the grooves face each other; plates made of electrocast zirconia brick, both ends of which are inserted into the respective grooves of opposing supporting bricks and are secured therein by mortar; and refractory holding bricks for holding the refractory supporting bricks and the ends of the plates in relative position.

Abstract: A gas producer for coal gasification in which the gas collecting flues are provided with means for flow rate determination and adjustable flow restriction.

Abstract: A system for removing material from the bottom of a pressure vessel without relieving the vessle's pressure in which a tube connected intermediate its inlet and outlet ends to the pressure vessel receives material through the connection and into pocket means carried by a conveyor running through the tube. The conveyor carries the material to the outlet or discharge of the tube. The pocket means form moving labyrinth seals at each end of the tube for preventing vessel pressure loss through the tube.

Abstract: An ignition burner and a pilot burner form part of an ignition system for a fluidized stream of finely-divided coal particles in a pressurized gasifier housing having a slag overflow pipe coupled to a discharge vessel. A fuel supply pipe delivers fuel for combustion by the ignition burner and the pilot burner. A sparkplug or hot wire is used to ignite the fuel delivered to the ignition burner. The flame produced by the ignition burner is widened by a baffle so that ignition by the pilot burner occurs to produce a flame which is monitored through a thermocouple. The parts forming the ignition system are carried by a pair of levers with pivots on the inner wall of a slag overflow pipe for movement between an operative position wherein the ignition burner is situated near the slag-receiving opening of the overflow pipe and an inoperative position wherein the ignition burner is protected from contact by slag and radiation heating.

Abstract: A thermal shielding for covers and bottoms of gas generators and other reaction vessels intended to operate at elevated temperature and pressure is disclosed wherein the cover or bottom comprises an extension, integral with the reaction vessel, with an outer closure supporting a plurality of spaced guide tubes having fluid jackets at the inner ends thereof, the fluid jackets of a plurality of circumferentially spaced guide tubes being interconnected by concentrically spaced heat transfer tubes substantially aligned with the inner surface of the reaction vessel, the fluid jacket of one of said guide tubes being divided by baffle means into separate chambers respectively connected with supply and discharge lines for cooling fluid to be circulated through said plurality of fluid jackets and concentric connecting tubes whereby effective cooling is achieved at inner ends of said guide tubes with a minimum of congestion externally of the vessel cover or bottom.

Abstract: A water jacket for coal gasification in which the gas producer is provided with an inwardly directed collar spaced from the water jacket and a plurality of apertures through the collar formation such that the collar can assist in supporting the refractory material of the wall of the gas producer.

Abstract: A soot blower assembly (10) for use in combination with a coal gasifier (14). The soot blower assembly is adapted for use in the hot combustible product gas generated in the gasifier as the blowing medium. The soot blower lance (20) and the drive means (30) by which it is moved into and out of the gasifier is housed in a gas tight enclosure (40) which completely surrounds the combination. The interior of the enclosure (40) is pressurized by an inert gas to a pressure level higher than that present in the gasifier so that any combustible product gas leaking from the soot blower lance (20) is forced into the gasifier rather than accumulating within the enclosure.

Abstract: The invention discloses an apparatus for maximizing the uniformity of distribution of gasification medium in a rotary grid generator. To insure proper input, a distribution head is rotatably mounted within the interior of the rotary grid, and the distribution head is connected by means of elastic input conduits to either openings which are directly connected with the reactor chamber, or to distribution chambers in the individual segments of the rotary grid. Through use of the apparatus, the formation of canals through preferential gas flow in the solid beds of pressure gas generators is eliminated.

Abstract: Particulates are both filtered from a product stream and recycled to an associated reactor by a filtration means disposable in a product stream outlet port of the reactor.

Abstract: A cooling arrangement particularly for cooling a locking device arranged in a fuel feed opening of pressure gasification generators comprises a lock seat connected to the generator and a lock cone adapted for moving into and out of engagement with the lock seat and provided with a supply line to provide a cooling medium to the lock cone and a discharge line through which the used medium is drained off the lock cone. The lock cone is formed as a hollow body with a cooling chamber in its interior and is provided with guide means extending towards the lowermost area of the lock cone to direct the cooling medium into contact with the mostly overheated lowermost area of the lock cone positioned in a close relationship with the pressure gasification generator.

Abstract: An apparatus for handling lock gas which enters a charging lockhopper from a fixed bed coal gasifier vessel includes a separator having a fluid inlet, a gas outlet and a drain. After a charging operation, a pump floods the lockhopper with water under pressure to force the lock gas through the fluid inlet to the separator without loss of gas pressure. When rising water is sensed in the separator, the pump is deactivated and drain valves are opened to drain water from the separator and lockhopper back into a storage tank. The lock gas leaves the separator under pressure and may be applied to gas cleanup equipment.

Abstract: Apparatus for limiting fuel gas fed to the gas flare unit in a coal pressure gasification unit provided with a gas-steam turbine power plant connected thereto. Safety valves and a pressure orifice minimize atmospheric pollution.