Abstract: In a cooling column the feed material to be dried or cooled is intermittently transferred from any one sieve bottom to a subjacent sieve bottom as by tilting individual sectors of the respective sieve bottoms. As a result, the feed material comes to rest on the sieve bottoms with a non-uniform bed thickness, resulting in non-uniform drying or cooling, respectively, of the feed material. A substantially uniform bed thickness of the feed material on the sieve bottoms is therefore desirable. This is achieved by the invention by providing a levelling rod mounted in support means for oscillating movement about a stationary pivot axis and extending substantially transversely of the direction of movement of the feed material.

Abstract: The invention relates to apparatus for gentle thermal treatment of flaky or granulated material with vapors in continuous operation, wherein the vapors are introduced from the bottom and conducted in countercurrent to the material falling downwardly by gravity and by the aid of additional mechanical means through one treatment stage or a plurality of treatment stages, the individual treatment stages being defined by perforated plates to which the material to be treated is fed by horizontal motion, the space below the lowermost, unheated perforated plate serving to distribute the gases or vapors and to admit the latter uniformly to the entire treatment space, the bores of the openings or perforations in the plates having a cross-section which allows the vapors, but not the material being treated, to pass therethrough, in order, on the one hand, to achieve optimum vapor exploitation and, on the other hand, to prevent any damage to the material being treated (FIG. 1).

Abstract: A plate-type dryer or like heat-treatment apparatus has a plurality of annular horizontal plates upon which material is treated while a shaft surrounded by these plates carries a plurality of generally radial arms from which scraper blades are suspended. According to the invention, each blade is carried by a hanger which is pivotally mounted on the arm and reaches rearwardly to support the blade, another pivot providing a further degree of freedom ensuring full line contact of the lower edge of the blade with the plate.

Abstract: A particulate dryer is disclosed in which upwardly moving hot gases contact downwardly moving particulate matter. The particulate matter is supported by rotating trays which, due to the absence of support at their outer ends at selected loci are caused to tilt downward to effect passage of the particulate matter downwardly through the dryer.

Abstract: A sawdust drying apparatus and process wherein sawdust passes downwardly in a sinuous fashion to and through multiple, vertically spaced dryer plates at a temperature and velocity so as to progressively dry the sawdust and render it suitable as a highly combustible wood fiber fuel.

Abstract: A fuel dryer system for waste fuel boilers, such as for example those in the sugar cane processing industry where bagasse is used as a primary fuel, in which the dryer comprises an assembled, enclosed, vertical dryer structure of basically cylindrical shape through which hot drying gases flow with a conical materials collecting hopper and bottom discharge, having alternating conical-shaped rotating and fixed materials trays over which the materials (e.g. bagasse) to be dried move in a net direction from top to bottom (note Figure 1). Adjustable wipers are provided with the conical materials trays, with access portholes at each tray level. In the sugar cane boiler system the stack gases from the boiler are used for the hot drying gases (note Figure 5).

Abstract: Method and apparatus for the thermal treatment of slurries such as slurries of magnesite hydrate or the like. The method involves suspending the slurry in an airstream, passing the airstream with the suspended slurry particles into contact with a heated gas stream in a dryer, passing the thus-dried slurry to a multi-tiered heated kiln, introducing heated gases into the kiln for drying contact with the thus dried slurry, and passing the exhaust gases from the kiln to the dryer to serve as the heated gas stream.

Abstract: An apparatus for the treatment of divided solid material is provided having a chamber disposed about a generally vertical axis. Means are provided for introducing the divided solid material into the top portion of the chamber and further means are provided for introducing a pressurized gas into the bottom portion of the chamber. The apparatus includes first impeller means, supported by a first shaft adapted to rotate about the axis, and situated in the top portion of the chamber, for fluidizing the divided solid material in the top portion of the chamber to thereby prevent the divided solid material from clogging within the top portion of the chamber. Additionally, the apparatus includes second impeller means, spaced from the first impeller means, supported by a second shaft adapted to rotate about the axis, and situated in the bottom portion of the chamber, for radially dispersing the pressurized gas and for fluidizing the divided solid material in the bottom portion of the chamber.

Abstract: Aluminium fluoride hydrates, especially aluminium fluoride trihydrate, are dehydrated by a process involving dehydration in two sections, the first dehydration being effected in a disc dryer while observing certain process conditions and the second dehydration being effected in a fluidized bed at a temperature up to 600.degree. C.

Abstract: A fuel dryer system for waste fuel boilers, such as for example those in the sugar cane processing industry where bagasse is used as a primary fuel, in which the dryer comprises an assembled, enclosed, vertical dryer structure of basically cylindrical shape through which hot drying gases flow with a conical materials collecting hopper and bottom discharge, having alternating conical-shaped rotating and fixed materials trays over which the materials (e.g.bagasse) to be dried move in a net direction from top to bottom (note FIG. 1). Adjustable wipers are provided with the conical materials trays, with access portholes at each tray level. In the sugar cane boiler system the stack gases from the boiler are used for the hot drying gases note (FIG. 5).