SU1545050A1 - Installation for drying paste-like materials - Google Patents

Abstract

The invention relates to a technique for drying pasty materials and allows for intensification of heat and mass transfer and increase operational reliability. The installation contains a drying chamber 1, inside of which is placed a grinding device made in the form of a conical insert 15 attached to the wall of the camera 1 with a central channel 21 and concentrically placed along the periphery of its lower larger base with pins 17 (Ø) and a rotating grinder VI 16 in the form a disk placed under the insert 15 and provided with blades 23 in the central part, and along the periphery — with concentric rows of hollow pins ПШ 18. The PI is placed concentrically with the gas distribution grid 25 with a working clearance. The source material enters the central channel 21 and then to the blades 23, which direct it to grinding between rotating at high speed PN and stationary W. At the same time, in the grinding zone the material is dried by flue gases entering through PN. Next, the crushed material enters the drying part into the flowing layer on the grate 25. Fine dried material in the form of a gas suspension is sent for cleaning, and large particles are again sent to the grinding through the central channel 21. 3 il.

Description

The invention relates to a technique for drying pasty materials and can be used in the woodworking, pulp and paper, medical, chemical and food industries.

The purpose of the invention is to intensify heat and mass transfer and increase operational reliability.

Figure 1 is a schematic representation of a plant for drying pasty materials; Fig.2 - drying chamber, section; on fig.Z - section aa on fig „2„

The plant for drying pasty materials contains a drying chamber 1, in the upper part of which there is a hopper 2, equipped with a pschka feeder 3 with electric drive 4, and the drying chamber 1 itself is connected to a cyclone 5 with a fan 6. Its cyclone 5 is connected to the lower part of discharge hopper 7 through pipe 8, while the hopper 7 is provided with a supply gate 9 for returning a part of the dried material to the loading hopper 2 and a supply gate 10S through which the rest of the dried material is discharged into the transport pter 11. Drying chamber 1 in its lower part is equipped with a nozzle 12 for supplying heat transfer fluid obtained in the furnace 13 having an autonomous fan 14. Inside the drying chamber 1 there is a grinding device, made in the form of an insert 15 "truncated to the walls of the drying chamber 1 the cone, the smaller base of which is directed to the top of the drying chamber 1, and the rotating shredder 16, you

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filled in the form of a disk and installed under a large base insert 15; moreover, on this basis, the inserts 15, along its periphery, concentrically arrange the rows of pins 17, which interact in working condition with hollow pins 18 of a rotating chopper 16 equipped with a shaft 19 with an autonomous electric motor 20. The insert 15 is provided with a central channel 21 and elastic hangers 22 for fastening To the walls of the drying chamber 1. Under the exit from the central channel 21 of the insert 15 in the central part of the rotating shredder 16 are installed profiled blades 23. The gas distribution valve is located below the rotating shredder 16 Yelnia chamber 24, and the shredder ring 16 disposed concentrically with the gas distribution grille 25 and is mounted with a clearance to allow a free rotation. In the upper part of the drying chamber 1 there is a pipe 26 for draining the gas suspension of the dried material into the cyclone 5.

The apparatus for drying the pasty materials works as follows.

The initial wet material is loaded into the hopper 2, where a part of the dried material is returned to the stationary mode and where they are mixed by means of the screw feeder 3, which makes it possible to reduce the adhesion properties of the initial material. Then, the material is squeezed into the drying chamber 1, poured into the central channel 21 of the insert 15 and falls on the shaped blades 23 of the rotary shredder 16j, figure 1

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Claims (2)

SUMMARY OF THE INVENTION '1. Installation for drying pasty materials, containing a chamber, the insert. 2. Installation according to claim 1, characterized in that the insert 30 is attached to the walls of the chamber by means of elastic suspensions. ' I · -, FIG. 3