SU580419A2 - Method of heat treatment of loose heat-sensitive materials - Google Patents

Description

one

The invention relates to methods for heat treatment of bulk heat-sensitive materials and can be used in agriculture.

According to the main author. St. 513221 is a method of heat treatment of bulk heat-sensitive materials, such as grains, with partial recirculation of dry material by preheating, mixing with recycle material, binning and drying in isothermal mode, with all material passed through preheating in a boiling layer being isothermally dried and the bin, and after leaving the zone, it is divided into two streams, one of which is sent for recirculation and the other for cooling 1.

The disadvantage of this method is the cumbersome design and low operational reliability.

In order to increase the processing efficiency by organizing a secondary recirculation loop, a part of the wet material after preheating to the / right is mixed with the initial wet material, and the mixture is fed to the extractor, and then reheated.

The drawing shows a diagram of the installation that implements the described method.

The installation contained vertical lifts I and 2 materials, heat and moisture exchangers 3 and 4, chambers 5 and 6 for heating and drying, respectively, cooler 7, mixers 8 and 9 for wet and dried (or dry) materials.

Mixer 8 simultaneously receives unheated wet and heated dried material, the mixture of which is directed through vertical lift 1 and heat exchanger 3 to chamber 5, in which the mixture is heated to the maximum permissible volume / ne / temperature and L, then divided into two parts.

One part of the mixture, which is recycled, enters the mixer 8, in it

mixed with unheated material. Another part of the mixture through the mixer 9, in which it is mixed with dry recycled material, enters the lift 2 and then through the heat exchanger 4 into the chamber

6 drying, the last mixture is heated to the maximum allowable temperature. After the drying chamber 6, the flow of the dried wet material is divided into two parts. One part of the stream is sent to cooler 7, the other part is recycled. In cooler 7, the heated dried material is cooled by blowing it with atmospheric or artificially cooled air and removed from the plant.

The drying agent that has been discharged in the chambers is cleaned and sent to the mixing chamber of the plant flue.

Technical and economic efficiency from the irimenium of the method is to reduce the capital costs of creating new types of installations and operating costs for processing materials.

Claims (1)

Invention Formula The method of heat treatment of bulk heat-sensitive materials, such as grain. on auth. St. 513221, characterized in that, in order to improve the efficiency of processing the secondary recirculation circuit by the nute, some of the material after preheating is sent biased with the initial wet material, and the mixture is added to the spindle and then reheated. Sources of information taken into account in the examination 1. Copyright certificate № 513221, cl. F 26B 3/02, 1971.