Andritz-patentverwaltungs-gesellschaft M.b.h.

Andritz Ag

Maschinenfabrik Andritz Actiengesellschaft

Mascheninfabrik Andritz Actiengesellschaft

Giselher Stummer

Peter Scheucher

Dag Bergloff

Rudolf Schieg

Christian Maier

Wolfgang Wiesenhofer

Roland Schick

Franz P Kittel

Edgar Brogyanyi

Apparatus and method for drying sludge, in particular sewage sludge, by creating a granulate from the dried product. A mixture of a carrier material consisting of recycled sludge which has already been dried and liquid sludge is fed to a dryer. The dried product is fed to a solids separatorafter the dryerand is stored intermediately in the former in an intermediate container that is placed immediately downstream of the separator.

Method and installation for drying sludge

The invention is directed to a process and apparatus for drying a slurry, particularly a sludge, such as sewage sludge, in which a sludge mixture of recycled dried sludge and wet sludge is fed to a drier. The quantity of wet sludge or recycled dried sludge supplied to the drier is controlled based upon drier inlet temperature. In this way, the evaporation rate of the drier is kept substantially constant.

Process and apparatus for drying a slurry

A heat exchanger particularly for use in fluidized-bed driers, includes at least one supply pipe and one discharge pipe for the heat transfer fluid, and at least one heat exchange tube carrying the heat transfer fluid. In order to make the heat exchanger tubes easily accessible and to ensure that the distribution and drainage system for the heat transfer fluid affects the flow through the heat exchanger as little as possible, each heat exchanger tube is connected to the supply pipe for heat transfer fluid at one end and is closed at the other end. Each heat exchange tube includes an inner outlet tube pipe with a smaller diameter, which has at least one opening at the closed end of the heat exchanger pipe and an opposite end connected to a drainage discharge pipe for receiving the heat transfer liquid.

Heat exchanger with concentric tubes

Method and device for the detection and removal of bulges in continuous

The invention relates to apparatus for the dewatering of a web of cellulosic matter or a web of material for the pasteboard or cardboard production, having endless screen belts or the like circulating in opposite directions between which the web is made to pass for dewatering, the web being made to pass through at least one first dewatering zone with at least two screen belts or the like and thereupon to at least one further dewatering zone, in particular a compresion zone, with at least two screen belts. The invention is mainly characterized in that the web is made to pass at least largely unsupported from at least one dewatering zone serving as a pre-dewatering zone and in particular formed as a double screen belt press to at least one further dewatering zone, in particular to a compression zone in particular formed as a double screen belt press, preferably as a high-pressure press, one or a plurality of heating means, in particular means for applying a heating medium, conveniently one or a plurality of steam-blowing box(es), being provided behind the at least one first dewatering zone serving for pre-dewatering on the web or on the path of the web, in particular above it, one or a plurality of suction site(s), suction box(es) or/and heating means, in particular means for applying a heating medium, conveniently (a) suction box(es), being provided opposite to said steam-blowing box(es) on the other side, in particular underneath, the web or the path of the web, heating means and suction sites conveniently being disposed above and underneath the web opposite to one another and thus forming pairs.

Apparatus for the dewatering of a web of cellulosic matter or a web of

A pressure device for machines for dewatering or filtering of suspensions, sludges or the like or for material to be pressed for the exertion of surface pressure on at least one circulating pressure belt which can be provided for supporting an equally circulating filter belt, which pressure device consists of an essentially completely hollow pressure bladder in the form of a closed frame in particular of essentially quadrangular shape viewed in top view of the pressure belt, which pressure bladder is subjectable to pressure medium and forms a very small, self-adjusting gap on the edge.

Growing community of inventors

Kumberg, Austria

Giselher Stummer