RU2367867C1 - Device for bulk material drying - Google Patents

Abstract

FIELD: heating; drying.

SUBSTANCE: invention concerns bulk material drying and can be applied in various industrial spheres. Device for bulk material drying includes case with several discrete insulated pipes for drying agent inlet and discharge, insulated cooling boxes, and active work body. Work body is made in the form of auger with discrete gaps in coils at the points of cooling box mounting. Vanes are mounted in coil gap points.

EFFECT: improved performance and drying quality.

4 dwg

Description

The invention relates to the drying of bulk materials and may find application in various industries.

A device is known for drying bulk material, comprising a rotatable housing with a lifting-blade nozzle, the cantilever part of which is enclosed in a fixed casing, made in the upper part with double walls forming a collector (AS USSR No. 1339372, class F26В 11 / 04).

The closest in its technical essence is a device for drying bulk material, containing a housing with a number of discretely installed insulated ducts with air inlet and outlet pipes and an active working body (RF Patent No. 2314470, CL 26V 11/04).

The disadvantage of this device is the low productivity caused by the duration of the drying process. This disadvantage occurs because in the places where the cooling boxes are installed, there is insufficient interaction of the dried material with the cooled surface of the casing.

The objective of the present invention is to increase the productivity of the device and improve the quality of drying.

The present problem is solved in that in a screw dryer containing a housing with a number of discretely installed insulated nozzles for supplying and discharging a drying agent and insulated cooling boxes, the active working body is made in the form of a screw with discrete rupture of auger turns, and discrete breaks of auger turns are made in places installation of insulated cooling boxes, while blades are installed in the places of rupture of the turns.

The technical result is achieved by the fact that in the places where the boxes are installed inside the dryer body, more intense contact of the dried material with the cooled surface of the case occurs, which makes it possible to cool the external surface of the material and draw moisture residues from its warmest central part, and then remove moisture from the surface with a portion of hot gas bulk material.

Given that the ducts for supplying cold air are installed discretely, the drying process of the material is repeated several times and intensified, which is the achievement of the technical result.

Figure 1 is a diagram of the proposed device for drying bulk material.

Figure 2 is a diagram of the proposed device for drying bulk material with a local cut.

Figure 3 is a section along aa zone of motion of the drying agent.

Figure 4 is a section along BB the zone of movement of cold air.

The device for drying bulk material consists of an inclined housing 1, in which a working screw 2 with blades 3 is installed. A number of discretely mounted nozzles 4 for supplying a drying agent and nozzles 5 for removing the working agent through the mesh surface 6 are mounted on the housing 1 cooling boxes 7, in which the blades 3 of the working screw 2 are installed. At the end of the housing 1, nozzles are installed for supplying 8 and for extracting 9 cold air, as well as a loading nozzle 10 and an unloading chamber 11.

A device for drying bulk material works as follows.

The source material through the loading pipe 10 enters the body of the dryer 1, when the working screw 2 rotates, the material moves along the body of the dryer 1 and enters the zone of intense heating of the material, in which the drying agent is fed through the pipe 4 through the mesh surface 6 and discharged through the pipe 5, with This partially removes moisture from the outer surface of the material.

Then the material, moving along the casing 1, enters the fastening zone of the isolated cooling boxes 7, into which cold air is supplied, while it locally cools the surface of the casing 1, limited by the box 7.

In turn, the blades 3, mounted on the working screw 2 in places of insulated cooling boxes 7, during rotation increase the contact of the material with the cooled part of the housing 1, more intensive contact of the dried material with the cooled surface of the housing 1 occurs, which allows cooling the external surface of the material and pulling it out its warmest central part is moisture. Then, when passing through the zone of casings, the material will again be in the zone of intense heating of the material and the air flow of the coolant will remove moisture from the surface of the material. This process is repeated several times (depending on the number of boxes), then the material enters the final cooling zone, into which cold air is supplied through the pipe 8, blows the material and is discharged through the pipe 9, the material, in turn, is removed from the dryer through the discharge chamber 11.

Claims (1)

A device for drying bulk material, comprising a housing with a number of discretely installed insulated nozzles for supplying and discharging a drying agent and insulated cooling boxes, an active working body, characterized in that the active working body is made in the form of a screw with a discrete break of the turns, and discrete breaks of the turns of the screw made in places of installation of insulated cooling boxes, while blades are installed in places of rupture of turns.

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