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Method of separating foreign matter from a gas
vii
New Patents
There is provided an improvement in a recuperator of the type having an elongated flow passage defined by an inner heat exchanger wall wherein the flow passage has a selected crosssectional shape, a lower hot gas entrant end adjacent the gas outlet of a heating furnace and an upper gas exit end above and axially aligned with the lower end of the passage. The improvement involves the use of a radiator member in the form of a plug reciprocably mounted within said passage and movable axially within the passage betw ~ n a normal plug position adjacent the upper end of the flow passage and a furnace capping position adjacent the lower end of the flow passage.
An overall process of cooling, dust removal, tar removal and heat recovery of high temperature gas generated in coal gasification furnaces, and apparatuses employed therefor are provided. In this process, specific apparatuses such as fluidized bed-cooler, fluidized bed-combustion furnace for regenerating granules, granular bed filter, gas cooler, and tar scrubber are successively and effectively employed. During the process, high, medium and low pressure steam, for example, are recovered by heat exchange in these apparatuses.
4461635 CRYOPUMP OR HEAT PUMP CIRCUIT
4460386 METHOD OF SEPARATING FOREIGN MATTER FROM A GAS
Vigg Rudebeck, Augustenborg, Denmark assigned to Danfoss A/S
Wolodymy Diachuk assignedto Century 21 Pollution Control Inc
The invention relates to a cryopump or heat pump circuit having in series a compressor, a condenser, an expansion valve and an evaporator. The expansion valve is controlled as normally by a sensor which is responsive to the superheating of refrigerant at the outlet of the evaporator. In order to assure sufficient dryness of the evaporator output to make the expansion valve operative, the sensor is connected to a heat source which generates a sufficient amount of heat so that the sensor assumes a temperature corresponding to the set superheating.
A hot gas cleaning and heat transfer method associated with a cooking hood assembly to separate foreign matter and liquids from gas moving through the hood assembly and transferring heat from the gas to a cooling liquid. A heat conducting wall surrounding a tubular passage accommodating a plurality of helical elements divide and, direct gas into separate helical gas streams. The cooling liquid surrounds the wall to lower the temperature of the wall. Foreign matter, gas vapors, and liquids are separated from the hot gas into an annular sheath adjacent the heat conducting wall. The foreign matter, gas vapors, and liquid particles suspended in the gas are combined by mechanisms of centrifugal force, adhesion, condensation, and impaction. The gas vapors are condensed into liquid droplets. The liquid droplets, liquids, and foreign matter merge into a liquid film on the inside of the wall. This liquid film is moved down the wall and collected in an annular collecting member located adjacent the exit end of the wall. Clean gas flows through the annular collecting member to a desired location.
4461629 HEAT RECOVERY PROCESS COAL GASIFICATION
IN
Kenj Arisaki, Kure, Japan assigned to BabcockHitachi Ltd
4461651 SONIC
CLEANING DEVICE AND METHOD
Richard I Hall, St Catherines,Canada assigned to Foster Wheeler Limited A sonic cleaning device and method for removing accumulated fine particles from surfaces such as in heat exchangers using sonic energy vibrations. In the invention, a gas is passed through a tube having internally corrugated walls and having the tube outlet end attached to the inlet end of an expanding horn. The gas flows past the corrugations at high velocity and produces high intensity sonic vibrations within the tube, and the vibrations are amplified by passage through the horn. The horn outlet is directed at a surface to be cleaned and the accumulated particles are fluidized by the sonic energy and removed from the surface by the flowing gas and/or by gravity.
New Patents
There is provided an improvement in a recuperator of the type having an elongated flow passage defined by an inner heat exchanger wall wherein the flow passage has a selected crosssectional shape, a lower hot gas entrant end adjacent the gas outlet of a heating furnace and an upper gas exit end above and axially aligned with the lower end of the passage. The improvement involves the use of a radiator member in the form of a plug reciprocably mounted within said passage and movable axially within the passage betw ~ n a normal plug position adjacent the upper end of the flow passage and a furnace capping position adjacent the lower end of the flow passage.
An overall process of cooling, dust removal, tar removal and heat recovery of high temperature gas generated in coal gasification furnaces, and apparatuses employed therefor are provided. In this process, specific apparatuses such as fluidized bed-cooler, fluidized bed-combustion furnace for regenerating granules, granular bed filter, gas cooler, and tar scrubber are successively and effectively employed. During the process, high, medium and low pressure steam, for example, are recovered by heat exchange in these apparatuses.
4461635 CRYOPUMP OR HEAT PUMP CIRCUIT
4460386 METHOD OF SEPARATING FOREIGN MATTER FROM A GAS
Vigg Rudebeck, Augustenborg, Denmark assigned to Danfoss A/S
Wolodymy Diachuk assignedto Century 21 Pollution Control Inc
The invention relates to a cryopump or heat pump circuit having in series a compressor, a condenser, an expansion valve and an evaporator. The expansion valve is controlled as normally by a sensor which is responsive to the superheating of refrigerant at the outlet of the evaporator. In order to assure sufficient dryness of the evaporator output to make the expansion valve operative, the sensor is connected to a heat source which generates a sufficient amount of heat so that the sensor assumes a temperature corresponding to the set superheating.
A hot gas cleaning and heat transfer method associated with a cooking hood assembly to separate foreign matter and liquids from gas moving through the hood assembly and transferring heat from the gas to a cooling liquid. A heat conducting wall surrounding a tubular passage accommodating a plurality of helical elements divide and, direct gas into separate helical gas streams. The cooling liquid surrounds the wall to lower the temperature of the wall. Foreign matter, gas vapors, and liquids are separated from the hot gas into an annular sheath adjacent the heat conducting wall. The foreign matter, gas vapors, and liquid particles suspended in the gas are combined by mechanisms of centrifugal force, adhesion, condensation, and impaction. The gas vapors are condensed into liquid droplets. The liquid droplets, liquids, and foreign matter merge into a liquid film on the inside of the wall. This liquid film is moved down the wall and collected in an annular collecting member located adjacent the exit end of the wall. Clean gas flows through the annular collecting member to a desired location.
4461629 HEAT RECOVERY PROCESS COAL GASIFICATION
IN
Kenj Arisaki, Kure, Japan assigned to BabcockHitachi Ltd
4461651 SONIC
CLEANING DEVICE AND METHOD
Richard I Hall, St Catherines,Canada assigned to Foster Wheeler Limited A sonic cleaning device and method for removing accumulated fine particles from surfaces such as in heat exchangers using sonic energy vibrations. In the invention, a gas is passed through a tube having internally corrugated walls and having the tube outlet end attached to the inlet end of an expanding horn. The gas flows past the corrugations at high velocity and produces high intensity sonic vibrations within the tube, and the vibrations are amplified by passage through the horn. The horn outlet is directed at a surface to be cleaned and the accumulated particles are fluidized by the sonic energy and removed from the surface by the flowing gas and/or by gravity.