Abb Flakt Ab

Valmet Fibertech Ab

Andritz Fiber Drying Aktiebolag

Heikki Salo

Lars-Erik Johansson

Claes Halldin

Ingemar Rydell

Ake Ringqvist

Stellan Jonasson

When drying a web-formed material, the web-formed material is passed, in contact with a gas-permeable dryer screen, through a drying plant. One or more fans blow hot process air against, and through, the web-formed material in order to dry it. A chamber, surrounding the fan or the fans, has a limiting surface that is essentially parallel to the surface of the web-formed material. This limiting surface has an opening that extends essentially across the whole width of the web-formed material. A distributing member, in the form of an arcuate perforated, sheet-formed element, placed outside the chamber, covers the opening completely. With the distributing member a first flow of process air is divided into a large number of jets, distributed over essentially the whole of the angular area that faces the web-formed material. Thereafter, the jets are allowed to mix with one another again to form a second flow of process air, which is passed through a flat perforated, sheet-formed element that is positioned close to and extends over essentially the whole of the web-formed material, and then against and through the web-formed material lying on the gas-permeable dryer screen.

Method and a device for drying or heat treatment of a web-formed material

Apparatus is disclosed for separating particles disposed in a carrier gas being delivered from a distributor to a moving web including a roller, a supply conduit for supplying the particles dispersed in the carrier gas substantially tangentially to the roller at a first speed, the roller rotating at a second speed which is substantially greater than the first speed whereby the particles are separated from the carrier gas, the roller including a discharge opening for discharging the particles toward the moving web and a return line for recycling the carrier gas. A method for separating particles dispersed in a carrier gas is also disclosed.

Device for distributing particles

Cyclone

Growing community of inventors

Växjö, Sweden

Heikki Salo