SU1416826A2 - Drying installation - Google Patents

Abstract

The invention improves the quality of drying. The installation contains a loading chamber 1, a drum 4, an unloading chamber 5. On the inner surface of the drum at the outlet of the distributor 2 heat carrier, which is made in the shape of a truncated cone, a guide apparatus is fixed. The device is made in the form of a disk 16 and a finger 17 installed with overlapping and at a distance from each other equal to (O, 2-2.0) A, the diameter of the disk 16 is equal to (O, 6-0.8) A, ring width 17 is (0.1-0.2) A, where A is the diameter of the large base of the distributor cone. The disk 16 prevents the passage of coolant along the axis of the drum 4 and changes its direction. Ring 17 also changes the direction of flow of the heat transfer fluid. 2 Il.

Description

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The invention relates to a technique for drying dispersed materials, can: be applied in various areas of industry and is additional to auth. No. 1177621. I The purpose of the invention is to increase the quality; drying facilities.

In Fig. 1, a drying apparatus is shown, a general view, in Fig. 2, section A-A in Fig. 1.

I The drying unit contains a back-up chamber: load chamber 1, a distributor I heat carrier 2, a feeder 3, a rotating drum I, 4, an unloading chamber i 5 with a hygroscopic waste 6 heat sink. Boot chamber 1 ime; There is a device for supplying heat-transfer fluid 7. Its internal space 8: is connected to the internal space: vom 9 of the heat carrier distributor 2 I through tuyeres 10 and slit nozzle 11.: The tuyeres 10 are equipped with regulating; valves 12, suction pipe 13

 bodies through a large base of the cone enters the rotating drum 4.

In the distributor of heat carrier 2, the tangential flow velocity of the gas suspension is 20–50 m / s, and the aerodynamic (axial) velocity is 10–15 m / s.

The tangential speed rejects the product from the center to the periphery and, under the action of this speed, the product settles on the walls of the rotating drum, the product is evenly distributed over the drum volume by its transshipment system and is dried qualitatively. An end wall 15 is installed in the flow path of the heat carrier. The disk 16 of the end wall 15 prevents the heat carrier from passing along the axis of the rotating drum 4 and changes its direction. Part of the product at a meeting with the disk 16 out of the coolant on the walls of the drying drum. Leaving part about

perforated with holes 14 along the side-25 duct and coolant from the central

howl surface. The coolant distributor 2 is made in the shape of a truncated cone with a displaced apex embedded in the loading chamber 1. - The base of the cone. Is inserted inside the rotating drum 4 and is equipped with an end wall 15 consisting of a disk 1 b and a ring 17 .:

Drying installation works as follows.

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The source product is fed by the feeder 3 into the internal space 9 of the heat carrier distributor 2, and through the tuyeres 10 and the slit nozzle 11, a fresh heat carrier is introduced at a speed of 20-50 m / s. The output rate of the coolant of the tuyere 10 is controlled by valves 12.

This speed provides high quality dispersive products and intensive heat and mass transfer during the first drying period. If the starting product comes in the form of lumps that are not sprayed with the energy of the jet of coolant leaving the tuyere 10, then such a lump is blown off by air coming out of the slotted nozzle 11e into the rotating drum. From the distributor of the coolant 2, a part of the high-moisture coolant is discharged through the openings 14 of the suction pipe 13. The other part of the coolant 0 5

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parts of the drum are directed to the periphery, near which the coolant still retains its rotational motion.

When the flow collides, the tangential velocity decays, and the ring 17 again changes the direction of flow of the heat transfer fluid, as a result of which the remaining product falls out of the flow to the drum walls, and the coolant velocity is equalized throughout the cross section of the drum 4 and is 0.5- 5 m / s. If there is no end wall T5, then a part of the product in the amount of 10-15% moves along the axis at a speed of 10-15 m / s and undisturbed enters the flue 6.

Claims (1)

Invention Formula Drying installation on auth. No. 1177621, characterized in that, in order to improve quality, on the inner surface of the drum, at the outlet of the distributor, a guide apparatus in the form of a disk and a ring, mounted with the first cover and at a distance from one another, is fixed (0.2- 2.0) A, with the diameter of the disk D (O, 6-0.8) A, and the width of the ring S (О51-0.2) A, where A is the diameter of the larger base of the distributor cone, FIG. 2