SU575463A1 - Apparatus for drying loose materials in fluidized bed - Google Patents

Description

one

The invention relates to a drying technique and can be used in peat processing, chemical, food and other industries.

A known device for drying loose materials in a boiling layer, comprising a variable-section drying chamber with a gas distribution grid at the base, a loading and unloading device l.

During the operation of such an installation, the material being dried is fed into the chamber via a charging device onto a gas distribution grid, through which the coolant flows. The material is dried in

fluidized bed mode and removed from the chamber by means of a discharge device.

However, with this installation it is difficult to regulate the parameters of the heat transfer medium without deteriorating the thermal performance of the process, which reduces the efficiency of the installation.

The purpose of the invention is to increase the efficiency and quality of drying.

This is achieved by attaching longitudinal side panels to the base of the chamber.

| Pockets covering the lattice, and in pockets symmetrically with respect to the vertical axis of the chamber, are mounted with the possibility of moving a trapezoidal plate arranged parallel to the lattice and overlapping a portion of its surface from above,

The image of the working area of the lattice surface in the direction of the unloading device, and above the lattice section, located under the boot device is installed with the possibility of reciprocating movement parallel to the lattice perforated valve.

In addition, the flow area of the lattice in the area located under the flap is 2O-25% more than the passage section of the lattice in the rest of the area, and the parameters

the perforations of the valve are equal to the parameters of the perforation of the lattice area located under the valve.

FIG. 1 shows schematically the proposed installation, the general view; in fig. 2, section A-A of FIG. 3; in fig. 3 shows a section Ej-B of FIG. one; in fig. 4 shows a section bb of FIG. one;

in fig. 5 shows a section of GGD FIG. 2

The installation contains a drying chamber 1, the side walls of which form an angle of 30, gas supply psh 2 and discharge 3 nozzles, loading 4 and unloading 5 devices, side pockets 6, covering the gas distribution grid 7, in which trapezoidal plates 8 are placed, moved with drives 9, perforated valve 10, having a drive 11. Each drive 9 consists of a lead screw 12, a pair of gears 13, an intermediate shaft 14 and pins 15, and the drive 11 of a screw pair 16 and pin 17,

The installation works as follows.

The material to be dried, for example, milled peat, is fed into chamber 1 by means of a loading device on the grate 7 under the influence of the heat transfer fluid coming through the nozzle 2. The dried material

is removed from chamber 1 by means of a discharge device 5, or the heat transfer medium through pipe 3.

The amount of heat transfer fluid entering through the grate 7 in the loading zone is adjusted by horizontal movement of the flap 10 having a perforation identical to the perforation of the grate 7 in this area. This movement is carried out by means of a drive 11.

Flow control The heat of the ositel entering through the grid 7 in the rest of its area is made by moving the plates, 8, located; in the side pockets 6. This movement, carried out simultaneously by both plates 8, either at one end or at both ends, allows the working surface of the grille 7 to be narrowed or stretched. For this purpose, actuators 9, in each of which

the ends of the plates 8 are interconnected

through sheome intermediate shaft 14.

The proposed installation allows by

Adjusting the flow of coolant to the length of the grating 7 lead-the process of actual materials

: with varying initial moisture in optimal conditions, which reduces energy consumption and improves the quality of the dried material.

Claims (3)

1. Installation for the bulk materials in the fluidized bed, containing a variable-section drying chamber with a gas distribution grid at its base, a loading and unloading device, characterized in that, in order to improve the efficiency and quality of the juice, longitudinal side pockets are attached to the base of the chamber covering the lattice and in pockets symmetrically with respect to the vertical axis of the chamber are mounted with the possibility of longitudinal movement of the trapezoidal plate arranged parallel to the lattice and overlapping from above, a part of its surface, forming a narrowing of the working section of the lattice surface in direction to the unloading device, and above the section of the grid located under the loading device, is installed with the possibility of reciprocating, the perforated damper moves parallel to the grid. J. 2. Installation on. 1, about tl and. h and so that the flow cross section of the grating in the area located under the flap is 20–25% larger than the flow cross section of the grating in the rest of its area. 3. Installation on PP. 1 and 2, characterized in that the parameters of the perforation of the valve are equal to the parameters of the perforation of the yiacTKa lattice located under the embossment. Source of information taken during the examination: 1. Copyright certificate №252923, M.Kl. F 26 V 17/40, 1967. FIG. 2 fig c - B 8 5rrr // FIG. 5 / J /,