A/s Niro Atomizer

Niro A/s

Niro Holding A/s

Mogens A Christensen

Ib H Sorensen

Mikael Bonde

Benny Madsen

Henrik B Mortensen

Jens K Laursen

Benny H Madsen

Svend Hovmand

A bed plate for a fluid bed apparatus comprises a great plurality of bulges or dents each having at least one through-going gas flow opening defined therein. Conventional bed plates having openings of the gill type inevitably comprises small cracks or notches formed in the edge portion defining each of the gas flow openings. According to the invention the gas flow openings are formed in the bulges or dents in a manner so as to exclude the formation of such notches in the edge portion. This may, for example, be done by forming such openings with crack free edges prior to or after the formation of the bulges or dents. Thus, the openings may be formed by punching, drilling, laser cutting or the like. Each of the gas flow openings is directed in relation to the plane of the bed plate so as to cause a flow of gas, which is passed through the opening, to contact an adjacent part of the bed plate, which interconnects the bulges or dents.

Fluid bed apparatus, a bed plate therefore, and a method of making a bed

Method and apparatus for treating a pulverulent or particulate material

Bed plate for a fluidized bed apparatus and a method for making the same

A fluid bed dryer comprises a bed plate having gas distributing openings in the plate. The gas distributing openings are arranged in pairs of substantially oppositely directed openings, and a depressed portion of the plate extends between the openings of each pair. Throughfall of products through such openings is substantially eliminated, and by suitably choosing the relationship of the effective area of the oppositely directed openings in the pairs of openings it is possible to obtain a desired relationship between the vertical fluidizing component and the horizontal transporting component of the upwardly directed gas flow through the openings of the bridge plate.

Fluid bed dryer and a bed plate therefor

The invention relates to an apparatus for processing a powdered or particulate product forming a vibrating fluidized bed supported by a thin, perforated bed plate which is vibrated while gas is blown upwardly through the perforations of the plate. The bed plate which is made from thin sheet metal is provided with parallel corrugations extending transversely to the direction in which the fluidized product is moved along the plate. The corrugations impart a desired stiffness to the plate and in order to promote removal of residual product from the plate when supply of product to the plate has been terminated, the openings in the plate may be formed so as to direct gas flows supplied therethrough in the same general direction transverse to said corrugations towards an outlet of the apparatus.

Apparatus for processing a powdered or particulate product

In the chamber of a fluidized bed reactor for processing powdered products, a pneumatic cleansing device is arranged which comprises at least one pipe member mounted to be movable parallel to a perforated powder supporting plate at a small distance from the upper side thereof and having nozzles for ejecting air or gas towards the supporting plate to remove depositions of material from the upper side thereof between the perforations in the plate through which a fluidization gas flows upwardly to form a fluidized powder layer overlying the plate. The cleansing device may comprise additional pipe members with nozzles for ejecting air or gas towards the side wall and ceiling of the chamber and may be constructed for use in a box-shaped chamber as well as a cylindrical chamber for fluidized bed reactors of the plug-flow or spray granulation types.

Cleansing device for fluidized bed reactors

Growing community of inventors

Virum, Denmark

Mogens A Christensen