Andritz-patentverwaltungs-gesellschaft M.b.h.

Voith Sulzer Papiermaschinen Gmbh

Sulzer-escher Wyss Limited

Binder + Co. Aktiengesellschaft

Erwin Brunnmair

Herbert Holik

Werner Leitenberger

Reinhard Pinter

Gerhard Moosmann

Peter Commerford

Georg Krebs

Alfred Bubik

Harald Hess

Elmer Weisshuhn

Thomas Merath

Klaus Steier

Johann Moser

Helmut Steib

Stephan Wild

Robert Kollegger-Riedler

A cyclone for separating solid particles from an exhaust gas flow includes a housing with a jacket area that is cylindrical at least in some sections, with a cover area, and with a bottom area. An exhaust gas line opens into an inlet opening and is for an exhaust gas flow mixed with solid particles. A discharge opening is for the solid particles separated from the exhaust gas flow. An immersion pipe has a penetration area passing through the housing and has an open end area protruding into the interior of the housing and used as an outlet opening for the purified exhaust gas flow from the housing. At least one pure gas line supplies pure gas, creating a second boundary layer flow to replace a first boundary layer flowing having an increased concentration of solid particles.

Cyclone having a pure gas line

A process for the incineration of particulate solids, especially biological waste matter with low caloric value, feeds the solids into a combustion chamber of a furnace together with a sub-stoichiometric amount of fresh air to control the rate of combustion and to inhibit the formation of sintered ash. The furnace for implementing the process can be a cyclone furnace having a primary combustion chamber with a first feed inlet for the solids and air and a second air inlet positioned between the first inlet and an exhaust gas outlet. A supply tube extends through the exhaust gas outlet of the primary combustion chamber to supply a source of fresh air at ambient temperature to maintain the primary combustion chamber at a desired temperature. The fresh air maintains the furnace temperature at least at about 850&deg; C. and generally at about 850&deg; C. to less than about 1100&deg; C. A source of fresh air at ambient temperature can also be directed into the primary combustion chamber through an annular air passage surrounding the exhaust gas outlet of the primary combustion chamber. The less than stoichiometric amount of air and the secondary air maintains the furnace at a sufficiently lower temperature to inhibit sintering of the solids.

Process and device for incineration of particulate solids

A process and apparatus for mechanical and thermal dewatering of solid-liquid mixture, particularly industrial and sewage sludges, feeds the sludge to a dewatering device to produce a dewatered material which is then dried in a thermal drier. The dewatered sludge is reduced to a granulate-like structure without any intermediate stage and is then dried immediately afterwards. An apparatus for implementing the process includes a mechanical dewatering device being directly connected to a feed unit to produce a granulate-like structure and which is permanently connected to the thermal drier.

Process and plant for mechanical and thermal dewatering of sludges

A process and apparatus for drying material, particularly sludges, with indirectly heated driers includes a system for the thermal decontamination of exhaust air from the drier. Excess exhaust air from the drier loop is fed as secondary air to the heating boiler or furnace separately from the primary air for combustion of the fuel and to thermally clean the exhaust air from the drier. The exhaust drier gas from the drier remains in the furnace for a period to decontaminate the drier gas, after which it is mixed with the flue gases. The mixture is then removed from the furnace. The system is suitable for operation under normal operating temperatures and at low, below normal operating temperatures.

Process and apparatus for drying material with indirectly heated driers

A process and apparatus for drying material, in which a previous dried material is mixed into the wet material to be dried to produce a dried mixture of different particle sizes. The process for drying material requires less industrial equipment implemented in a more economical and simpler plant that can be operated with low energy and maintenance requirments. The amount of fine material obtained after drying is measured and the amount of fine previously dried material mixed into the wet material to be dried is then set in inverse proportion to the quantity of fine dried material produce.

Process and apparatus for drying material

A process and an apparatus is disclosed for drying sludge or other materials, more specifically, sewage sludge, in which a mixture of base material and wet material is introduced to a drier and passing hot gas or hot air passed over the mixture. The process and apparatus by regulating the feed rate of the wet material (wet sludge) in relation to the exit temperature of the hot gas or hot air from the drier. In embodiments, the feed rate of material is adjusted to maintain a substantially constant temperature of the gas.

Process and apparatus for drying a solid-liquid mixture

A drying section of a papermaking machine includes several drying groups with at least one drying screen each. At the end of one drying group and/or at the beginning of the next following drying group, a finishing roller is utilized. A finishing nip is formed between one of two finishing rollers and a finishing roller and a drying cylinder of an adjacent drying group. Only the paper web is conveyed through the finishing nip.

Drying section with an adjacent finishing roller

The apparatus for interconnecting two groups of driers of a papermaking machine serves to interconnect two successive drying sections through which successively travels a paper web which is dried by such successive drying sections. When needed or desired, such interconnection must be interrupted. For this purpose there are used additional elements which are capable of bringing about a separation of the endless drying wires associated with the respective web drying sections and, at the same time, during normal operation, that is, during the transfer of the paper web from the one to the other drying section, affording a regulatable operation capable of retaining the quality of the paper web. Thus, for this purpose there are proposed the use of adjustable rollers and also suction boxes operated under vacuum conditions.

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Graz, Austria

Erwin Brunnmair