SU732640A1 - Method for heat treatment of non-threshed grain products - Google Patents

Description

(54) METHOD OF HEAT TREATMENT OF URBRANTED GRAIN PRODUCTS

one

The invention relates to methods for the heat treatment of grain products and can be used in agriculture and the harvesting system.

A known method of heat treatment of unmilled cereal products, mainly maize, is by drying the cobs in the mounds (claddings, tapes or chamber dryers) to a moisture content allowing them to be effectively threshed, after which the grain is dried and cooled 1.10

The disadvantage of this method is low efficiency, which leads to an increase in the duration of the process, as well as the low quality of processing caused by the lack of scientifically grounded processing regimes at each of the stages.

The aim of the invention is to increase the efficiency of the process and improve the quality of processing products.

To this end, the products are pre-heated to the maximum permissible temperature, drying is carried out to a moisture content of 20-25% in two stages, the first of which uses the spent substance, and the second is the drying agent.

with a temperature equal to the permissible heating temperature of the grain, with alternation of blowing the layer for 5-6 hours with the binning of the same length, before threshing, the material is further cooled to a temperature exceeding the outer one by 5-6 °, with a stepwise increasing cooling air velocity from 0, 1 to 0.5 m / s, and after threshing, the products are reheated to the maximum allowable temperature, and the desalination is carried out at a downward temperature of the drying agent, and cooling - with an increase in the velocity of atmospheric air t 0.1 to 0.5 m / s.

The processing of unmilled cereal products in this way is carried out as follows.

Received for processing non-corn grain products, mainly corn cobs, when loaded into the collar or chamber of the dryer are preheated to the maximum allowable temperature, for example, on a conveyor that supplies the cobs to the collet or dryer. Then the material is dried in two stages: the first uses the spent drying agent, and

the second, in order to avoid overheating of the product and reducing its quality, blow the product layer with a fresh drying agent and a temperature equal to the permissible heating temperature of the grain, and the blowing for 5 bh alternate with the cavities of the same length. It is also possible to increase the temperature of the drying agent by 5 ° compared with the permissible heating temperature of the product.

Studies have shown that the best quality of threshing is observed in cooled cobs, so before the threshing of the cob is cooled to a temperature exceeding the cooling air temperature by 5 °, and the speed of the cooling air is increased in steps from 0.1 to 0.5 m / s, which ensures better preservation of product quality and contributes to additional moisture reduction during the cooling process.

After threshing, the grain is sent to the grading, which can be done by one of the known methods, for example, in mining recirculation mines.

Before drying, the grain is preheated again, for example in cascade-type devices, to the maximum allowable temperature, and drying is carried out at descending temperature conditions, and at the beginning of the process it is possible to use a drying agent with a temperature exceeding the temperature of heating the grain by 30-50 °, and At the end of the process, the temperature of the drying agent should be equal to the temperature of the grain.

After drying, grain is cooled, which, in order to preserve

grain quality, carried out with a gradual increase in the velocity of atmospheric air from 0.1 to 0.5 m / s.

Claims (1)

Invention Formula The method of heat treatment of unmilled grain products, mainly maize, by drying their threshing products, drying and cooling with atmospheric air, characterized in that, in order to increase the efficiency of the process and improve the quality of processing, the products are preheated to the maximum allowable temperature; drying lead to a humidity of 20-25% in two stages, the first of which uses the spent drying agent, and the second - the drying agent with a temperature equal to the permissible temperature of heating the grain, alternating layer blowing for 5-b hours with the same the duration, before threshing, the material is additionally cooled to a temperature exceeding the outer temperature by 5-b °, with a stepwise increase in the speed of cooling air from 0.1 to 0.5 m / s, and after threshing, the products are reheated to the maximum allowable temperature, tion is carried out at a temperature range downward drying agent and cooling - with increasing air speed of 0 0.1 to 0.5 m / s. Sources of information taken into account in the examination 1. M. Golik. Storage and processing of corn cobs. M., “Kolos, 1968, p. 160.