SU924476A1 - Drum dryer - Google Patents

Description

(54) DRUM DRYER

one

This invention relates to bulk materials and can be used in the food and chemical industries.

Lime drum continuous dryers containing a horizontal cylindrical body with a loading and unloading chutes, a pipe for sucking moisture vapor and a rotating drum with a screw, inside which there is a cavity for the drying agent (1.

A disadvantage of the known apparatus is low drying efficiency due to the fact that the contact surface of the dried material with the heated drum is small.

The purpose of the invention is to intensify the drying process by increasing the surface of contact between the material being dried and the heated surface.

This goal is achieved by the fact that blades are mounted between turns of the screw, which are rotatably supported and provided with stops.

The cylindrical body is made up of two cylindrical chebech jets, forming a cavity for the drying agent.

The auger is provided with a mesh shell fixed to its outer generatrix.

FIG. 1 shows a drum dryer, a longitudinal section; in fig. 2 - the same cross section.

The drum dryer consists of a horizontal cylindrical body 1, made of two cylindrical shells 2 and 3, which form a cavity for the coolant. The housing 1 is equipped with a fitting 4 for suctioning the vapors, a loading 5, and an unloading 6 chutes. Inside the housing 1 there is a rotating drum 7 with a screw 8, inside of which there is a cavity 9 for the heat transfer medium. The screw channel of the screw 8 is provided with blades 10 evenly distributed along the length with stops 11. The blades 10 can be rotated through the angle limited by the cams 12. On the outer forming auger 8 fixed mesh shell 13.

Claims (3)

The device works as follows. 3 The lump material subject to slashing through the loading chute 5. Then I it enters the closed cavities bounded by the surfaces of the screw 8, the inner surface of the drum 7, the blades 10 and the mesh shell 13. In the closed cavities the lump material falls on the surface of the mesh shell 13 and the blades 10, which are held down by the stops AND, rise together with them to the upper extreme position of the drum by 7. At the same time, the lumpy material is poured from the surface of the mesh shell 13 onto the surface of the drum 7. After the passage of the extreme the top of the front in the course of the blade 10 under the action of its own weight is deflected at an angle limited by the cams 12, while the dried lumpy material is poured, well with the front folded blades 10, into the lower part of the mesh shell 13, where it again falls a cycle of movement around the drum 7. The dried lumpy material is removed from the dryer through the discharge chute 6. The dryer body 1 and drum 7 are heated with a heat transfer fluid that is fed into the internal cavity 9 of the drum 7 and between echaykami 2 and 3. The moisture vapor is removed from th through the sleeve 4. A proposed arrangement provides a drum dryer drying nostn effektiv6 increase due to the increase of the contact surface with the material to be dried and a heated surface of intense stirring. Claim 1. Drum dryer comprising a horizontal cylindrical body with a loading and unloading chutes, a pipe for sucking moisture vapor and a rotating drum with an insect, inside which is made a cavity for the drying agent, characterized in that, in order to increase the drying efficiency, between turns the blades are mounted blades that are fixed with the possibility of rotation and provided with stops. 2. The drum dryer according to claim 1, wherein the cylindrical body is made of two cylindrical shells, forming an additional cavity for the drying agent. 3. Drum dryer according to paragraphs. 1 and 2, that is, that the screw is provided with a mesh shell attached to its outer generatrix. Sources of information taken into account in the examination 1. Kasatkin A. G. Basic processes and apparatuses of chemical tehnolopi M., Khimi, 1971, p. 662-664. P // Q 2