SU1423169A1 - Apparatus for dehydration of polymeric materials - Google Patents

Abstract

The invention relates to devices for the dehydration of polymeric materials, for example films, chips, and can be used in enterprises for the processing of secondary polymeric materials. The purpose of the invention is to increase the degree of dehydration. The device comprises a housing I with a loading nozzle 2. Inside the housing 1 in its upper part, an impeller 4 is mounted on the drive shaft 3. A disk 7 with a central hole 8 for material passage and a cylindrical shell 9 are attached to the lower part of the impeller 4. the drive shaft 5 has blades 6 mounted. The angle of inclination of the blades 6 to the base 10 of the housing 1 is 10-20 °, and the base of the blades 6 is one third of the base 10 of the housing 1. In the cover 16 of the housing I there are holes for the passage air, erekrytye louver 17. This arrangement allows the split air stream conveying the wet material in the dewatering zone, from the air stream conveying the dewatered material, control the amount of inflow of dry air. All this contributes to increasing the degree of dehydration. 4 il. g (L

Description

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The invention relates to a dewatering apparatus for polymeric materials, such as films, chips, and can be used in recycling plants for secondary polymeric materials.

The purpose of the invention is to increase the degree of dehydration.

FIG. 1 shows the proposed device, the cut; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows a section BB in FIG. one; in fig. 4 shows a section B-B in FIG. 3.tO

The device for dewatering polymeric materials includes a housing 1 and a charging nozzle 2. Inside the housing 1 in its upper part, an impeller 4 is mounted on the drive shaft 3, and in the lower part also on the drive shaft 5 are mounted the blades 6. A disk is attached to the lower part of the impeller 4 7 with a central hole 8 for the passage of material and a cylindrical shell 9.

The blades 6 are attached to the base 10 20 of the housing 1 at an angle of 10-20 °. The base of the blades 6 is 1/3 of the area of the base 10 of the housing 1.

The side wall 11 of the housing 1 in the lower part is perforated and has a pocket 12 for collecting and draining the liquid phase and moist air through the nozzle 13.

The upper part of the surface of the housing I is made in the form of a cochlea 14 with a branch pipe 15. In the lid 16 of the housing 1 there are openings for the passage of air, blocked by louvers 17, regulating the flow of dry air. The impeller 4 and the loops 6 are driven back from the drives via the V-belt drives 18 and 19. In the proposed device, the word

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where /) is the inner diameter of the housing 1, mm;

D is the outer diameter of the disk, mm;

D2 is the diameter of the hole 8 for the passage of 40 polymeric material, mm.

A device for dewatering polymeric materials operates as follows.

The crushed and washed material through the loading nozzle 2 and the central hole 8 of the disk 7 enters the shell 9 (spin chamber).

The centrifugal forces formed by the rotation of the blades 6 throw the wet material onto the perforated wall 11 of the housing 1. The liquid phase together with the moist air through the perforations of the wall 11 of the housing 1 enters the pocket 12. The polymeric material continues to move into the upper part of the housing 1. From the pocket 12, liquid Each phase with humid air is led 55 through pipe 13 outside the device.

The pressed material captured by the blades of the impeller 4, through the output Pat

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cuttings 15 are transported to a storage bin.

A disk 7 with a cylindrical shell 9 fixed to the impeller 4 allows the material to be extended and does not allow it to immediately get onto the blades of the impeller 4 after exiting the pipe 2.

The disk 7 with the shell 9 simultaneously allows separation of the air stream transporting the wet material to the dehydration zone from the air stream transporting the dehydrated material.

The louvers 17 allow you to adjust the amount of dry air inflow and, therefore, balance the pressure in the two chambers.

The rotation of the impeller 4 and the blades 6 occurs at different linear speeds through the V-belt transmissions 18 and 19 from two non-interconnected engines, which allows simultaneously creating optimal conditions for the dewatering of the material and its subsequent transportation.

The cylindrical shell 9 mounted on the movable disk 7 partially overlaps the blades 6, which reduces the torque on the drive shaft 5 and hence the power of the electric motor, and the height of the cylindrical shell 9 lengthens the path of the material and improves the separation effect. The blades 6 are attached to the base 10 of the housing 1 evenly around the circumference and at an angle of 10-20 °. The inclination of the blades 6 to the base 10 is made in the direction opposite to the direction of their rotation, which does not allow the material to settle to the bottom of the housing 1.

A certain ratio of the base areas of the blades 6 and the base 10 of the body 1, equal to 1: 3, contributes to the fact that in the central part of the device, where the speed of the blades 6 tends to zero, the material with the liquid phase does not settle to the base 10 of the body I.

On the other hand, the liquid phase, having a density more than 10 times the bulk density of the polymer material, slides along the base of the impeller 4 of the squeezing device, rolls onto the base 10 of the housing 1 and is captured by air through the perforations of the side wall 11 of the housing 1 enters the pocket 12.

Thus, the invention makes it possible to increase productivity by 2, 4 times while reducing the residual moisture content by 3 times.

Claims (1)

Invention Formula A device for dewatering polymeric materials, comprising a housing with a perforated side wall, a lid and a collection of dewatered material, mounted in the upper part of the housing on the drive shaft, an impeller characterized In order to increase the degree of dehydration, a disk with a central opening for the passage of a polymeric material and a cylindrical shell are attached to the lower part of the impeller; blades are mounted on the drive shaft in the lower part of the housing; The base area of the blades is 1/3 of the base area of the housing, while in the housing cover there are holes for air passage, blocked by louvers. Aa 9e.g Vuz.