Abstract: An improved process and system for drying moist particulate carbonaceous materials. The invention has particular application to staged drying processes wherein the particulate material is entrained in one or more serially connect hot gas streams having a temperature above the degradation point of the carbonaceous material. The improvement includes providing contactors between the stages which intimately mix and contact the variously sized particles resulting in partial cooling of the smaller hot and dry particles and partial heating of the larger cool and relatively moist particles. The contactor may be provided by a rotating drum, moving bed, fixed bed or fluidized bed. The contactors prevent overheating of small particles during moisture removal and reduce hydrocarbon loss from small particle devolatilization.
Abstract: A hydrocarbon conversion-catalyst regeneration operation is described which relies upon an upflowing fluid catalyst mass generally decreasing in density of catalyst particles superimposed by an upflowing more dispersed catalyst phase undergoing catalyst regeneration and combustion of combustible materials to effect elevated temperature regeneration of catalyst deactivated by hydrocarbonaceous material under conditions providing low CO levels in the flue gas and generally less than 0.15 mol percent in the flue gas separated from regenerated catalyst particles. Regenerated catalyst at an elevated temperature of regeneration is mixed with spent catalyst recovered from hydrocarbon conversion in a first contact zone in the presence of a fluidizing gas to obtain an initial mix temperature of at least 1175.degree. F. before contact with a secondary oxygen containing regeneration gas stream in a more dense catalyst phase as a part of the upflowing fluid catalyst mass.
Abstract: A forced-circulation evaporator plant for concentrating products such as liquid distillation residues and caustic soda has a circulating pump for circulating a product to be concentrated to a battery of heat exchangers interconnected in series. The last exchanger in the series is directly heated with steam. All of the other exchangers are heated by water vapors generated by the evaporation of the product to be concentrated in a battery of flash drums traversed in series by the product and by steam from hot condensate liquids coming from the same exchangers.
Abstract: There is disclosed a heating system for regeneratively heating a coke oven battery having twin-heating flues extending side-by-side transversely of the length of the coke oven battery. Halves of the twin-heating flues are separated by a flue midfeather that forms a gas flow space at the top thereof. Between twin-heating flues, there is a heating wall midfeather extending up to the oven crown. Regenerators below the oven sole extend transversely to the coke oven battery with each regenerator coupled by three passageways to the heating flues. Two regenerators are associated with each twin-heating flue. A first passageway extends to the bottom part of one-half of one twin-heating flue, a second passageway extends to the bottom part of one-half of an adjacent twin-heating flue with these two flue halves separated by a heating wall midfeather.
Abstract: A spring adjusting device for a self-sealing coke oven door embodies a plurality of elongated, outwardly projecting housings carried by the outer side of the door. Each housing is provided with an elongated passageway therethrough in alignment with an opening through the door adjacent the outer edge thereof. A plunger is mounted for sliding movement through each opening with one end of the plunger engaging a flexible sealing member carried by the door and urging a sealing edge of the sealing member into engagement with the door jamb upon inward movement of the plunger. A compression spring is mounted within the passageway with one end thereof engaging an adjacent end of the plunger. Guide members at each end of the spring retain the spring in alignment with the plunger and out of engagement with the passageway. An actuator carried by the outer end of the housing compresses the spring and urges the plunger toward the sealing member.
Abstract: One or more quartz tubes (1) are utilized in apparatus for the concentration of an acid. Each quartz tube is heated from the outside, and the acid is fed in at the upper part of each tube. Concentrated acid is drained off from the lower part of each tube into a vessel (3) and the vapors driven off from the acid during the concentrating rise inside each tube, and are led off from the upper part thereof. Inside each tube, the acid first passes through a rectification zone (A) in the upper part of the tube, and then passes through a liquid film zone and a reservoir zone.
Abstract: An arrangement for filling at least one coke oven chamber has a transport device arranged to transport coal, a chute member located under the transport device to guide coal to a filling opening of the coke oven chamber, at least one closing member arranged between the chute member and the filling opening of the coke oven chamber, and a sliding plate moveable in a housing above the chute member between open and closed positions, wherein the sliding plate and the housing in its region in which the sliding plate is in its open position are inclined toward a horizontal.
Abstract: A coke calcining apparatus comprises a rotary kiln (1), an intermediate cooler (3) installed outside of but rotating unitarily with the kiln at an intermediate part thereof and having inlets (32) and outlets (33) respectively communicating with the upstream and downstream interiors (A,B) of the kiln, and an annular weir (7) fixed to and around the inner wall surface of the kiln at a part thereof between the inlets and outlets of the cooler and functioning to cause the entire quantity of coke (6) which has been subjected to a first-stage calcination at 600.degree. to 1,000.degree. C. in the upstream interior (A) to flow through the cooler (3). The coke thus cooled to 200.degree. C. or lower is subjected to a second-stage calcination at 1,200.degree. to 1,400.degree. C. in the downstream interior (B) for 10 to 30 minutes.
Abstract: A process for utilizing waste heat and for obtaining water gas during the cooling of incandescent coke ejected from a chamber oven is described, this process being in two stages. In the first stage, the coke is dry-cooled with a mixture of water gas and water vapor as the cooling gas. This is circulated, and from the circuit the desired waste heat and the desired water gas are extracted. In the second stage, the coke is wet-cooled with water. The water vapor formed is taken off and returned to the environment and/or to the second stage.
Abstract: Liquid wastes from atomic power plants are treated in an apparatus comprising a low electroconductivity liquid waste concentrator for evaporating a low electroconductivity liquid waste with outside steam as a heat source, and another liquid waste concentrator for evaporating another liquid waste with steam generated by evaporation of the low electroconductivity liquid waste in the low electroconductivity liquid waste concentrator as a heat source.
Abstract: Coal is pretreated for a coking plant so that it is passed in two stages through two throughflow driers successively connected with one another, the driers are supplied with a heat carrier formed by a steam overheated to a temperature between 400.degree. and 600.degree. C., dust is removed from the steam after passing the throughflow driers, and the steam is heated after the dust removal in a heat exchange with a circulating gas of a coke dry cooler.
Abstract: A monitoring system for checking an electric rotary machine for local overheating including a sensing device for sensing the concentration of minuscule particles in a gas serving as coolant for the machine, and a supply device for supplying to the sensing device a test gas containing minuscule particles of gasifiable liquid. The test gas is supplied to the sensing device by the supply device to permit the sensing device to perform a sensing operation, so as to determine whether or not the sensing device is functioning normally.
Abstract: Devolatizable fine-grained material which contains hydrocarbons is devolatilized by means of fine-grained solids which have been heated to temperatures of about 500.degree. to 1000.degree. C. The devolatilizable fine-grained material is mixed with the heated solids and is thus heated to temperatures of about 400.degree. to 900.degree. C. The mixture is passed through a dwell zone, and gaseous and vaporous devolatilization products are withdrawn and cooled. The heated solids are fed to the dwell zone as a loosened stream in a trickling and/or agitated state of motion, and the devolatilizable fine-grained material is introduced into said stream in order to be admixed thereto. The heated solids and the devolatilizable fine-grained material can be mixed in a weight ratio of 3:1 to 12:1. The stream of trickling heated solids can be deflected at least in part.
Abstract: A process for rapidly dewatering and drying calcium sulfate hemihydrate in a centrifuging and flash drying operation by ejecting the wet solids from the centrifuge bowl directly into the flash dryer's high velocity, high volume, heated air stream.
Abstract: A device for adjusting the position of a track mounted car from a first position where the car is initially spotted by conventional braking means to a second predetermined position on the track which must be reached within close tolerances. An arm which may be pivoted in a vertical arc parallel to the track is pivotally attached to the car at its one end and at its other end it has preferably cone-shaped feeler means which engages a protrusion fixed adjacent to the track. A preferably vertical gravity based reference position is selected for the arm, and a sensing means for producting a direct current output signal proportional in magnitude to angular displacement of the arm from this position and corresponding in polarity to direction of displacement is provided.
Abstract: System for concentrating and recovering acid comprising in combination a receptacle or storage tank for receiving and containing weak or dilute acid; an evaporating pan including a pipe connected to the receptacle or storage tank and a pump whereby acid may be delivered to the evaporating pan; a second receptacle or storage tank including a pipe connected to the evaporating pan and a pump whereby concentrated acid may be delivered to the second receptacle or storage tank; and an air drier device in the form of a tank containing acid and including an inlet through which air and water vapor may be introduced, and a pipe connection to the tank for weak or dilute acid; wherein the evaporating pan includes a heat collecting surface as a floor thereof and a lens focus top whereby heat energy from the sun's rays will heat and concentrate the acid therein by developing water vapor which is removed with air.
Abstract: A liquid solution is passed through a multi-stage evaporation plant while using recirculated vapor, fed through a mechanical compressor in order to increase the pressure and temperature of the vapor.The plant comprises a number of evaporators connected in series and split up into a plurality of groups, which comprise a decreasing number of evaporators; as seen in the flow direction--the vapor being fed in parallel, streams through said groups.
Abstract: A process for making doped semiconductor bodies in thick sheets by epitaxial growth of a doped monocrystalline semiconductor layer on a substrate body by means of a transfer reaction, the transfer system being so arranged that dead spaces are avoided and that within the transfer system a gradient of maximally 1.degree. C./mm is maintained. The invention makes it possible to obtain doped layers of larger thickness than heretofore known.
Abstract: A heating system for regenerative coke oven batteries having a plurality of coke oven chambers separated by heating walls and a plurality of regenerators extending the length of the coke oven for preheating air and cooling hot waste gases comprises a plurality of spaced heating ducts extending upwardly in the heating walls which are grouped into two adjacent pairs of heating ducts. The ducts in each group of four heating ducts are separated by first and second binder walls with the first binder walls carrying one binder duct for supplying air and discharging hot waste to and from adjacent heat ducts in one of the pairs in the group. The second wall is either provided with no heating ducts or a pair of heating ducts. A horizontal channel connects the tops of all four heating ducts in each group and the lower end of each heating duct is provided with a rich gas supply nozzle.
May 14, 1982
Date of Patent:
February 14, 1984
Firma Carl Still GmbH & Co. KG
Heinrich Weber, Dieter Stalherm, Klaus Urbye, Manfred Morgenstern
Abstract: An apparatus for distilling shale oil from oil shale, which comprises: a vertical type distilling furnace which is divided by two vertical partitions each provided with a plurality of vent apertures into an oil shale treating chamber and two gas chambers, said oil shale treating chamber being located between said two gas chambers in said vertical type distilling furnace, said vertical type distilling furnace being further divided by at least one horizontal partition into an oil shale distilling chamber in the lower part thereof and at least one oil shale preheating chamber in the upper part thereof, said oil shale distilling chamber and said oil shale preheating chamber communicating with each other through a gap provided at an end of said horizontal partition, an oil shale supplied continuously from an oil shale supply port provided in said oil shale treating chamber at the top thereof into said oil shale treating chamber continuously moving from the oil shale preheating chamber to the oil shale distilling c