Abstract:
Process and apparatus for treating a comminuted solid carbonizable material, such as comminuted municipal waste; sawdust, granulated coal, shredded tires and the like wherein the material is caused to be pyrolyzed in a horizontally disposed elongated reaction zone essentially free of any oxygen containing gases at ambient pressure and at a temperature of from 400.degree. C. to 900.degree. C. The material is passed through the reaction zone by paddle-like impellers mounted on a shaft while being subject to an indirect heat transfer relationship via a burning air fuel mixture spirally swirling within a heating zone about the reaction zone and the mixture being withdrawn from a lower portion of the heating zone. During pyrolysis, the material is chemically changed into valuable gaseous, liquid and solid products.
Abstract:
Apparatus for effecting the conversion of solid fuels (including solid organic waste materials having a fuel valve) by high temperature gasification into clean-burning and uniform gaseous fuel called "producer gas." The apparatus comprises a two-section, stacked double-shell gasifier reactor defining sequentially descending, drying, distillation, oxidation and reduction reaction zones through which a continuously fed column of the solid fuel descends during its conversion to a gaseous fuel. Means are provided for drawing process air into the oxidation zone for burning reaction with carbonized fuel passing therethrough and for thereafter drawing reaction gases in downdraft fashion through the lower fuel reduction zone of the gasifier and thence in sequence through the annular space defined by the double-shell structure of the lower section of the gasifer in indirect countercurrent heat exchange relationship with the fuel column portion in the oxidation and reduction zones and through the annular space defined by the double-shell structure of the upper section of the gasifier in indirect co-current heat exchange relationship with the fuel column portion in the drying and distillation zones. The inner shell elements of the two sections of the stacked double-shell reactor structure are arranged in hanging manner within their respective outer shell elements to allow expansion of the double-shell structure under the high temperature conditions experienced by the gasifier without harmful stress build-up in the apparatus.
Abstract:
Apparatus for effecting the pyrolytic treatment of solid carbonizable materials, such as coal, shredded scrap-tires, comminuted municipal waste, sawdust and wood shavings, and the like. The treatment takes place in a cylindrical, horizontally-disposed reactor vessel including a material conveying device which transports the carbonizable materials through the vessel as a moving bed. A heating chamber is arranged coaxially around the reactor vessel and is configured as an annulus of substantially uniform inner diameter and of decreasing outer dimension from its forward end adjacent the materials outlet end of the reaction vessel, to its rearward end, adjacent the materials inlet end of such vessel. The material passing through the reaction vessel is subject to an indirect heat transfer relationship with a burning air-fuel mixture spirally swirling within the heating chamber and moving in a direction generally counter-current to the material passing through the reaction vessel. The burning air-fuel mixture and combusted gases are progressively constricted and confined by the heating chamber configuration and leave the heating chamber via an exhaust gas exit conduit located at a low point in the heating zone. During its passage through the reaction zone the material to be carbonized is converted by pyrolysis, or high-temperature destructive distillation, into combustible gases, liquid hydrocarbons and solid carbonaceous residues.
Abstract:
The invention relates to a tubular cored electrode for producing a high-strength fusion-welded connection and relates to a method for producing tubular cored electrodes with a diameter of less than 2 mm. In order to avoid an oxidation and water absorption of the filler flux and to retain the original thermal reaction potentials of the mineral constituents thereof, according to the invention the tubular cored electrode is characterized in that the cold formed metal tube has in the longitudinal direction a tight fusion welded connection or a weld seam, which has a smaller weld penetration than corresponds to the tube wall thickness and in this manner a spacing of the metal bond of the tube wall towards the flux core is formed.
Abstract:
A device for determining the condition of railway switches or railway crossings by monitoring the end position of tongue rails (2), said device having a sensor (18) within the area of the theoretical frog point (17) of a frog (8), said sensor giving on occasion of a mechanical collision with the wheel flange or with the running surface of the wheel a signal indicating premature wear within the area of the frog.
Abstract:
Apparatus for the conversion of solid fuels and solid organic waste materials by high temperature gasification into gaseous fuel called "producer gas." The apparatus comprises a stacked two-section gasifier defining sequentially descending drying, distillation, oxidation and reduction reaction zones through which a column of the solid fuel descends during its conversion to the gaseous fuel. The lower reactor section is of double-shell construction and defines the lower oxidation and reduction reaction zones. Means are provided for drawing air into the oxidation zone for burning reaction with carbonized fuel passing therethrough and for thereafter drawing reaction gases downwardly through the lower reduction zone of the gasifier and then through the annular space defined by the double-shell structure of the lower section in indirect counter-current heat exchange relationship with the fuel column portion in the oxidation and reduction zones. The inner shell element of the lower section is arranged in hanging manner within its associated outer shell element to allow expansion of the double-shell structure under the high temperature conditions experienced by the gasifier without harmful stress build-up in the apparatus. The inner shell element supports within its lower portion two stacked funnel-shaped transition pieces which form a series of throat-like constrictions for supporting the fuel column in the gasifier and which cause localized increase in the velocity of the gases passing downwardly therethrough and leaving the reduction zone of the reactor.
Abstract:
In a reversing device for movable parts of a railway switch within the deflection area of a railway switch, in particular tongue rails, monorail deflection device or movable stock rails, in which device the movable rails can be caused to contact rigid switch parts, the movable rails are supported in their contacting position by supporting rods extending in the longitudinal direction of the rail the supporting rods are slideably guided on the sleepers or, respectively, base plates in the longitudinal direction of the rails. In this case, the supporting rods are designed as adjusting members for the reversing operation and comprise thrust supports cooperating with thrust supports of the movable rails for shifting the rails. At least one of the mutually cooperating surfaces of the thrust supports of rail and/or of supporting rod is formed of a wedge surface passing over into a supporting surface extending in an essentially parallel relation to the longitudinal direction of the supporting rod. The supporting surface cooperates in the contacting position of the rail with the thrust support of the rail. This provides in a simple manner the possibility to reliably and exactly effect reversing operation for railway switches, in particular high speed switches having a great radius of curvature.
Abstract:
The invention relates to a tubular cored electrode for producing a high-strength fusion-welded connection and relates to a method for producing tubular cored electrodes with a diameter of less than 2 mm. In order to avoid an oxidation and water absorption of the filler flux and to retain the original thermal reaction potentials of the mineral constituents thereof, according to the invention the tubular cored electrode is characterized in that the cold formed metal tube has in the longitudinal direction a tight fusion welded connection or a weld seam, which has a smaller weld penetration than corresponds to the tube wall thickness and in this manner a spacing of the metal bond of the tube wall towards the flux core is formed.
Abstract:
In a reversing device for rails which are swivelable around a swivelling axis, or for movable frogs within the crossing area of a railway switch, the swivelable rails or, respectively, the movable frogs are supported in their position being in alignment with wing rails or, respectively, connecting rails or, respectively, being in contact with such rails by supporting ro)$