Abstract: A treatment medium, such as cooling air, is blown onto the surface of a web moving in a longitudinal direction, with the aid of at least one longitudinal blowing box or so-called nozzle finger extending across the web and having at least one blowing nozzle facing the web. The blowing box is longitudinally separated by a divider wall forming at least a longitudinal nozzle chamber and at least one overflow chamber. Both channels receive treatment medium at the same end of the box. The divider wall has at least one opening through which the two channels communicated with each other at the opposite end of the box. This feature assures a treatment medium distribution in the channel facing the web, as if treatment medium were supplied into the blowing box at both ends. The box may also be divided into two nozzle channels and two overflow channels, whereby two divider walls may extend substantially vertically to form two overflow channels each having a triangular cross-section.

Abstract: A process and apparatus to produce ultra high purity oxygen comprising serially oriented stripping and absorbing columns having defined flow stream relationships.

Abstract: The invention provides an improved means of producing the refrigeration required for any fractional distillation air separation process. The improved refrigeration technique causes the distillation columns to operate more efficiently, and thereby permits increased recovery and/or purity of product at lower energy input. Referring to FIG. 3, refrigeration air is partially expanded in expander 313, then condensed by exchanging latent heat with depressurized kettle liquid in condenser 314, and the resulting liquid air is split and used to reflux both columns 307 and 305 via pump 316 and valve 315 respectively.

Abstract: A flotation drying system utilizing a nozzle assembly having a mounting system that enables quick assembly and disassembly of the system. The nozzle assembly comprises one or more high pressure supply headers or bulkheads, a nozzle housing extending across the grooved face of the one or more bulkheads in a perpendicular direction to the direction of the bulkhead, the nozzle housing having a port connecting it to the bulkhead so that a stream of air goes through the nozzle housing and is applied to the web for drying. The nozzle assembly comprises sealing plates removably supported by the groove face of the bulkhead adjacent each of the nozzle housings to seal the area between the nozzle housings. A flange extends from each of the nozzle housings over the sealing plates as a means to seal the nozzle housings to the grooved face of the bulkhead.

Abstract: A process to produce liquid cryogen wherein subcooled supercritical liquid is expanded without vaporization and a portion thereof is used to carry out the subcooling by vaporization under reduced pressure.

Abstract: A process to produce methane gas product with reduced product compression requirements comprising pumping liquid methane from a cryogenic nitrogen rejection plant to a high pressure thereby utilizing available excess refrigeration, and rewarming the pumped liquid methane product against incoming process streams.

Abstract: A stayrod configuration for permitting complete sludge lancing of the tubesheet, including a plurality of first stayrods, each having the same diameter as the steam generator tubing and being threaded into the tubesheet at spaced positions which match the tube pattern. This plurality of first stayrods is attached to a connector, which is threaded to provide a receptacle for a second, full-length stayrod within a shortened spacer.

Abstract: A web of photosensitive material fed into a drying chamber is carried on an endless conveyer belt hanging in a U-shape in contact with and guided along a U-shaped belt guide. Hot air is blown out of a duct arranged within the U-shaped belt guide to dry the material and press it against the surface of the conveyer belt. Thus, the material is carried by the belt conveyer smoothly without suffering any damages on its surface due to rubbing against guide members.

Abstract: A web treatment system includes main housing structure, chamber structure in the main housing structure that defines a thermally insulated web treatment zone, and structure that defines a web inlet at one end of the web treatment zone and a web outlet at the opposite end of the web treatment zone, so that a web path through the web treatment zone between the web inlet and the web outlet is defined. A series of elongated gas distributing nozzle bar structures are supported in the upper region of the web treatment zone above and along the length of the web path. Each gas distribution nozzle bar structure has opposed end walls and elongated lower wall structure extending between the end walls across the width of the web treatment zone, an inlet port in one end wall and outlet port structure in the lower wall extending along the length of the gas distribution nozzle bar for directing flow of gas from the supply plenum downwardly toward the web path.

Abstract: A machine for the continuous centrifugation of fabrics, comprising: a hauling means for the fabric formed by two endless bands having respective facing runs and an orbitting central block in which there are situated guide means for the bands, such that the latter follow cylindrical orbital paths during the passage thereof through the central block and conical orbital paths from the central block to the infeed and delivery ends of the machine. The orbital movement of the central block causes effective centrifugation of the fabric hauled by the bands, without causing therein harmful pulls or stresses.

Abstract: For the separation of C.sub.5+ hydrocarbons from a gaseous stream containing light hydrocarbons, C.sub.1 -C.sub.5, and, in some cases, lower boiling components, e.g., hydrogen, the gaseous feedstream, under pressure, is cooled, partially condensed, and separated into a liquid fraction and a gaseous fraction. The liquid fraction is separated by rectification under a lower pressure into a product stream consisting essentially of C.sub.5+ hydrocarbons and a residual gas stream predominating in components lower boiling than C.sub.5. The gaseous fraction separated after the partial condensation is introduced into a recontacting column wherein C.sub.5+ components still contained in the gas are scrubbed out. The scrubbing step is performed with a partial condensate of the overhead product of the rectification. The loaded scrubbing liquid is then introduced into the rectification as reflux.

Abstract: A dual sleeve boiler is arranged to dispose a portion (72, 74, 76) of its fluid conduit between a support member (64) of the boiler and the heat generating portion (20, 24) of the boiler. The end of a conduit through which water is introduced to the boiler is disposed between an enclosing means (24) which forms an axial end of the boiler and a cylindrical tube (64) disposed through the center of the boiler for purposes of supporting the boiler. As relatively cool fluid is introduced into the conduit of the boiler, it passes between the heat generating portions (20) of the boiler and the support tube (64) and provides a thermal barrier to prevent heat from traveling, through conduction, into the supporting means (64) which is attached to an external support member (71). This prevents heat from flowing into the external support member (71) and possibly damaging heat sensitive components attached thereto.

Abstract: An air box has at a forward side thereof an air inlet or inlets. A pouch-shaped air intake is attached to the forward side of the air intake for drawing air to the air inlet or inlets. A wiper unit is installed on the air box in such a manner as to partly project into the inside of the air intake. A wiper pivot is installed on the forward side of the air box in such a manner as to have an upper portion projecting into the inside of the air intake.

Abstract: A method of burning solid fuel having low melting point alkaline compositions, such as alkali metal salts, particularly lignite and salty brown coal. The fuel is introduced into the reaction chamber of a circulating fluidized bed reactor, and is mixed prior to introduction to the reaction chamber with a reactant material capable of reacting with the low melting point alkaline compositions of the fuel to produce high melting point alkali metal compounds during combustion. The temperature in the reaction chamber is kept below the melting point of the formed alkali metal compounds. The reactant material comprises silica oxide or a metal oxide, or hydroxide, of the group consisting of aluminum, calcium, magnesium, iron, titanium, and mixtures of two or more thereof. Kaolin is particularly effective, especially when the molar ratio of Al/(Na and K) is at least 1.0.

Abstract: A device for preventing resinous condensate dropping for use in a paint drying oven. The device includes a trough extending along an upper edge of a wall opening for passage of articles under drying treatment, to receive condensates of residual tar and guide them to laterally outwardly of the articles. The trough has a slate or other water-retentive member applied to an undersurface thereof to prevent formation of condensates on the undersurface. A glass wool member is interposed between the trough and slate to act as heat insulator.

Abstract: An apparatus for supporting a ceramic tube during firing thereof includes a base on which is mounted a lower end of the ceramic tube and supports extending upwardly from the base. A brick member is supported on the supports for grasping an upper end of the ceramic tube and for, during axial contraction of the tube during firing thereof, suspending the tube and allowing withdrawal of the lower end of the tube from the base while ensuring vertical alignment of the thus suspended tube. The brick has therethrough an opening for surrounding the upper end of the tube and defining a balancing space between the brick and the tube. Mortar fills the balancing space.

Abstract: An in-bed tubular heat exhanger support structure comprising a plurality of fluid-cooled support tubes which extend over and are supported by the wall headers of a fluidized bed boiler. Each support tube has at least one upright portion which extends into the fluidized bed region of the boiler, and wherein at least one of the heat exchanger tubes is clamped or otherwise fixed to the upright portion of the support tube.

Abstract: A process for distillation of two materials of differing boiling points particularly propane, ethane or carbon dioxide from natural gas is described in which the conventional distillation tower is divided into a first tower (102) at higher pressure than a conventional tower and a second tower (104) at lower pressure. Liquid drawn from the first is expanded to the lower pressure through two or more stages (111,112) with cool extracted (65,62) at each stage and used to cool (65,62) gas (51) withdrawn from the top of the first tower to keep the top tray at a required temperature. Gas (19) withdrawn from the second tower (104) is compressed and cooled for return to the first tower as a reflux. The use of the cool from the expanded liquid and the use of the two towers provides an improved thermo-dynamic efficiency and avoids the use of costly turbo-expanders.

Abstract: In a cryogenic air distillation process for producing medium-to-high purity oxygen plus optional coproduct argon, a new process sequence results in more efficient distillations at reduced supply pressure and full O.sub.2 recovery. Reforming to FIG. 2, a minor stream of supply air is additionally compressed by compander 204, cooled, and then reboils column 201 by total condensation in reboiler 205. The liquid air is split into two intermediate reflux streams, one for each column 201 and 202, valves 206 and 207, thereby improving the efficiency of both columns. The air condensing in 205 is somewhat hotter than that supplied to 202, due to its higher pressure, which permits a reduction in the main supply pressure.

Abstract: An apparatus for controlling operation of a recovery boiler for compensating a predetermined reference temperature of black liquor by a compensation value in accordance with a type of an injecting gun provided in the boiler, a compensation value set by the properties of the black liquor, a compensation value set by the temperature of charbed and a compensation value set by an air flow rate to the boiler representing the magnitude of boiler steam output or load to control the black liquor temperature supplied to the boiler.