Abstract: A dry cooling installation for coke includes an upright cooling shaft having an upper inlet for coke to be cooled and a lower inlet for a recirculating counterstream of cooling gas. Two gas discharge ducts are connected at two opposite points to the cooling shaft and communicate respectively with dust separators. A waste gas heat boiler is arranged between the separator and communicates with the same so as to receive clean gas in a direction which is substantially perpendicular to the movement of separated dust particles.

Abstract: Method for gasifying carbonaceous fine-grained or sludgy material, such as powdered brown coal or biomass, in fixed bed reactors. Carbonaceous material to be gasified is pre-heated and dried, and mixed with coarse-grained, non-carbonaceous ballast material. This mixing is carried out prior to, during or after the pre-heating and drying of the carbonaceous material, to thereby obtain a pre-heated and dried mixture of the carbonaceous material and the ballast material, and to also obtain vapor from the pre-heating and drying of the same. The heated and dried mixture is contacted with a gasification medium within a fixed bed reactor, at a temperature sufficiently high to gasify the carbonaceous material. The gasification medium includes the vapor from the pre-heating and drying of the carbonaceous material. The ballast material provides sufficient gas permeability to the fine-grained or sludgy carbonaceous material, to permit gasification thereof in the fixed bed reactor.

Abstract: A method of generating a low-tar generator gas includes contacting the hot tar-containing generator gas in a contact zone with ballast bodies to cool the generator gas and capture tar and dust on the exposed surfaces of the ballast bodies, and admixing the thus heated ballast bodies to the wet solid fuel to be gasified to dry and pre-heat such fuel in preparation for the actual gasification which is performed in two separate gasification zones which are arranged one above the other by reacting the solid fuel with an oxygen-containing gasification medium that is introduced from above into the upper one, and from below into the lower one, of the gasification zones with attendant formation of two conflagration fronts in the gasification zones. The generator gas which is thus generated in the two gasification zones is discharged through a common discharge conduit which has the contact zone incorporated therein.

Abstract: Method for the continuous gasification of solid carbonaceous fuel, especially fuel having a high water content such as biomass and brown coal, in which the fuel is indirectly heated by condensing steam. Steam removed from the fuel during drying is then utilized to aid in the gasification of the same, thus producing generator gas, which is directly recovered.

Abstract: Method for purifying waste water in a compact settling plant, particularly for waste water which is biologically very loaded, wherein the final settling tank (23) is arranged inside a scavenging basin (3), wherein the aeration of waste is separated from the aeration of the return sludge, the two flows being mixed and previously degased before entering the scavenging basin and optionally once more contacted with a gas. Due to the star configuration of the aeration, suction and mixing units, a uniform charge and transformation are obtained so that at equal flow rate, the volume may be reduced with respect to conventional plants.

Abstract: Apparatus for drying or cooling bulk material of the type which includes a vibratory conveyor through which the bulk material is transported includes the improvement wherein a plurality of partition members are provided in the conveyor so as to define between them a plurality of channels, the partition members preferably having fin-tube configurations whereby the same carry a thermal transfer fluid for facilitating the heat treatment of the bulk material. Apparatus for screening the fine portion of the bulk material is provided in the channels which preferably narrow in the direction in which the bulk material is transported so that the fine portion of the material receives less thermal treatment.