SU578537A1 - Device for drying loose, lumpy and paste-like materials - Google Patents

Description

one

The invention relates to a drying technique, and more specifically to combined sunflower installations and can be used in the chemical, poverty and other sectors of the industry, as well as in agriculture.

Installations for drying granular, paste-like and lumping materials are known, containing a bale chamber with a gas distribution grid and a tangential inlet of the secondary heat carrier, a cyclone connected to the chamber at the gas turbine, and a pipeline. The discharge port of the cyclone is connected to the tangential input 1.

The sticking of the dried material onto the walls of the cyclone, uneven boiling of the layer and clogging of the gas distribution grid should be attributed to the underemployment of known installations.

The purpose of the invention is to provide an intensification of the drying process.

This is achieved by the fact that the connecting pipe on the unit between the fluidized bed chamber and the cyclone is provided with a bypass line, a cone with a perforated bottom is vertically displaced in the upper part of the chamber, and an axially plugged nozzle at the bottom is connected to the mountain source of which there is air and having a radial lawn yards of pipe fittings, located in a knp and 1, layer. In addition, the gas distribution pcnicTKa is stepped with vertical hardening elements, and in sections of the bend each stunya is connected with 1: i3UHaHpaii.iHioiUcii pipe 11.

FIG. i image / ksna we offer installation, general view; in fig. 2 - the same view

from above; in fig. 3 - gas distribution grid.

The installation contained a casting chamber 1, in the upper part of which a colus 2 with an unformed bottom 3 is mounted for vertical movement. In the lower part of the chamber there are oceBoii plugged with a power pipe 4 with radial gas-distributing pipes 5 connected to a hot air source. The gas distribution grid 6 is made stepped with vertical perforated elements 7. Each grating stage in the bend sections is connected to a gas-gaiter tube 5. Chamber 1 with pipe 8 connects with a pneumatic feeder 9 and a cyclone 10. Pipe 8 in the area between the cyclone 10 and chamber 1 is equipped with a bypass line 11 Cyclone 10 with its discharge nozzle is connected to chamber 1 at the place of tangential entry 12 of a secondary teplonosntel into it.

The small fraction is discharged through the pipe 13, the large fraction through the pipe 14.

The wet material is supplied by pneumatic feeder 9 to cyclone 10, where some of the moisture is removed. After drying in the cyclone 10, the material enters the chamber 1, into the space formed by the wall of the chamber 1 and the cone 2. The coolant is supplied through an axial nozzle 4 with radial gas guide pipes. It then flows through the gap formed by the cone 2 and the wall of chamber 1 into the upper part, where the secondary coolant is introduced tangentially, giving the flow a rotational motion. In the rotating fluidized bed formed by the vortex, the fine fraction of the material is dried and discharged through the nozzle 13, and the large fraction of the material flows into the lower part of the chamber 1 onto the gas distribution grid 6. Here, as a result of the supply of heat transfer fluid through the tubes 5 and the gas distribution grid 6, individual vortex zones are formed. The dried material (crust fraction) is removed through nipple 14.

The spent coolant enters the pipeline 8, where it is divided into the main stream, which picks up the wet material from the pneumatic dryer 9 and directs it to the cyclone 10, and an auxiliary stream to the bypass line 11, which forms an air cushion, preventing the material from sticking to the cyclone wall ten.

The application of the proposed installation will allow to dry materials with high initial humidity in intensive mode.

Claims (2)

1. Installation for drying bulk, lumpy and pasty materials, containing fluidized bed chamber with gas distribution grid and tangential input of secondary heat carrier and connected to the chamber by means of a cyclone pipeline, the discharge port of which is connected to a tangential input, which is different to ensure the intensification of the drying process, the connecting pipe in the area between the chamber and the cyclone is equipped with a bypass line; movement of the cone with a perforated bottom, and the bottom part is muffled axial top nozzle connected to a source of hot air and having a radial gazonapravl tube guides disposed in the fluidized bed. 2. Installation according to Claim 1, characterized in that the gas distributor grid is made stepped with vertical perforated elements, and in the bending sections, each step is connected to a gas-supplying tube. Sources of information taken into account in the examination 1. USSR author's certificate 259700, cl. F 26B 3/10, 1968. five