SU1019192A1 - Sunflower seed drying method - Google Patents

Description

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The invention relates to a technique for drying sunflower seeds and can be used in agriculture, the harvesting system, and in the oil and fat industry.

A known method of heat treatment of heat-sensitive materials in countercurrent, and before heating the mixture is subjected to preliminary extraction for min, and drying is carried out with a step downward change in the temperature of the coolant using a Preheater of the mixture of fresh heat carrier with the same temperature as in the high-temperature drying step, and recirculated are taken after low temperature stage 1.

The disadvantages of this method are low intensity of the drying process and uneven processing.

The closest to the invention to the technical essence is the method of drying sunflower seeds by sequentially heating the agent to dry the mixture of initial and recirculating materials, binning, drying, additional binning, drying in the descending temperature mode and cooling with outside Air 2 J.

The disadvantages of this method are low intensity of the process, uneven processing and low quality of drying.

The aim of the invention is to intensify the process, reduce energy consumption and improve the quality of drying,

The goal is achieved by the fact that according to the method of drying sunflower seeds by heating agents drying the mixture of raw and recirculating materials, binning, drying, additional binning, drying at a downward temperature and cooling the outside air before heating the mixture of the source and recirculating materials, the recirculating material is preliminarily treated for 3 hours with a drying agent with a temperature of 190-200 C, heating the mixture is carried out at the same temperature for 6-8 seconds, extracting the mixture is carried out in echenie min drying - for 6-12 with drying agent at a temperature 0 120-1 G, additional otlezhki - during 1112 min, and after cooling, the mixture is subjected to final binning.

The drawing shows the setup diagram that implements the proposed method

The installation contains drying and heating 1, drying 2 and cooling 3 shafts with corresponding bunkers - heat and mass exchangers 4-6, heat generator 7, pipe 8 for loading raw seeds and diffusers for entering the drying agent. The cooling shaft 3 has a diffuser 12 for intake of outside air. Bunkers - heat and mass exchangers have overflow windows 13.

The installation works as follows.

The raw seeds come through the pipe 8 into the drying and heating shaft 1, where they are heated to the maximum allowable temperature from the drying agent supplied through the diffuser 9 from the heat generator 7. After the seeds are heated in the mine 1, they are fed to a heat exchanger. In the process of retrieving the seeds in the bunker 4, they are cooled. Therefore, in order to reach the maximum permissible heating temperature, a part of the seeds is returned to the shaft 1, where they are exposed to a fresh drying agent supplied to the shaft 1 from the heat generator 7 through the diffuser 10. The circulated seeds are mixed with the raw seeds coming from the pipe about 8 heat them up. Heated to the maximum permissible tegiperperatu heating through overflow windows 13 seeds come from the hopper

4c bunker. Heat exchange exchanger 5. During the circulation of seeds and feeding them into the drying shaft 2 from the bunker

5 intensive drying occurs while maintaining the maximum permissible seed heating temperature. Dried seeds from the hopper 5 through the overflow windows 13 are fed to the hopper 6.

For the possibility of cooling the seeds to a predetermined temperature from the hopper

6 seeds are supplied with the required number of circulation through the cooling shaft 3. Through the diffuser 12 into the shaft

3, external air is supplied. The cooled and dried seeds are removed from the dryer through the overflow windows 13. The number of raw seeds fed through the pipe 8. The number of dried seeds removed through the overflow seeds is indicative of the dryer, the windows 13 and. The invention allows to intensify the process, reduce energy consumption and improve the quality of drying.

Claims (1)

METHOD FOR DRYING SUNFLOWER SEEDS by heating with a drying agent a mixture of source and recycle materials, draining, drying, additional draining, drying under a descending temperature regime and cooling with outside air, which differs in that, in order to intensify the process, reduce energy consumption and improve the quality of drying, before heating the mixture of the source and recycle materials, the recycle material is preliminarily activated for 3–4 with a drying agent with a temperature of 190–200 ° C; the mixture is heated at the same temperature temperature for 6–8 s, the mixture was cured for 5–8 min, dried for 6–12 s with a drying agent at a temperature of 120–140 ° C, additional cured for 11–12 min, and after cooling subjected to final, recycle.