SU714111A1 - Method of drying rice grain - Google Patents

Description

(54) METHOD FOR DRYING RICE-GRAIN

The invention relates to methods for drying rice grain and other bulk heat-sensitive materials under cracked cracks. The known method of drying rice grain consists in supplying a heat carrier to the free grain supply. The grain is pre-heated by the spent drying agent 1 before entering the zone with the main component. At the same time, condensation of the good on the surface of the grain is excluded, i.e. the grain is dried during this period. The disadvantage of this method lies in the fact that cracks are formed in the grain during the drying process and therefore it is not possible to ensure the output of the whole core when processing processed rice-grain at the rice plant. The aim of the invention is to reduce the formation of cracks in the grain during the drying process. The goal is achieved by the described method of drying rice-grains, which consists in supplying a coolant to the free feeding grain. At the same time, the grain is preheated without moisture evaporating from it, then the grain is washed with heat-transfer agent of the state of equilibrium with it, then csmiaT the grain with an unhumidified drying agent, then again washed with an equilibrium with its heat-transfer agent and dried grain to a predetermined humidity. The technology of the method is as follows. The initial wet rice grain enters the preheating apparatus at the beginning of the heating zone of the grain, and then into the drying zone. In the heating zone, the grain passes through a condensation zone, in which the moisture of the coolant condenses on the grain, and the heat necessary for heating to a predetermined temperature is released (depending on the temperature and moisture content of the coolant in the condensation zone). From the condensation zone, the grain enters the heating stabilization zone, in which the grain is washed with heat carrier with a temperature close to that of the heated grain. From the heating zone, the grain enters the drying zone, in which moisture and part of the original condensate evaporates, which eliminates the appearance of a volume-stressed state in the grain, leading to cracks. Wherein

  -. .,. “Vv.

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the grain reaches a humidity of 16-17% and enters; sishylny annspaf and stshy

IridHbniieifmoro vlabosbdё ezhShy. In the case of high humidity of the initial grain, the air flow to the high drying zone of the drying zone is divided into two streams, one of which is sent for recirculation, and the second also enters the drying unit in the zone of increased moisture content. In this call, the moisture is condensed on the already heated, dried grain, which leads to the restoration of the initial formation of the Cisat during the drying

- krg5P p and kashll y sh top. grain and smart) is a volume-stressed state in the grain. Then the grain enters the drying zone of the drying apparatus, where it is dried. n

moistened drying agent . . .,. FIG. 1 shows a diagram of the drying process.

The raw grain enters the heater 1, in the yyrhyoy part of which the heat carrier is recirculated. From the heat generator 2. in the lower part of the heater 1 enters the drying agent coolant. The heated and dried grain from the heater .1 enters the grain dryer 3, forming several zones, to which the drying agent is supplied. Exit from. grain dryers 3, the grain is divided into

two streams, one grain stream returns to dry (recirculation), ai second stream, which is a grain with a moisture content of 16-17%, enters the zone 4 of the increased vlazg-soderzhanyy drying apparatus

5, which serves waste in 1Pg sealer 1 coolant. From zone 4, the grain enters the drying zone 6 of the drying apparatus 5, into which the drying agent is supplied from the heat generator 2. Then the grain enters the cooling chamber 7, the drying apparatus 5, where atmospheric air is supplied, and is sent for storage. .

Data from experimental studies of drying rice grain using the described method have shown that grain quality is improved, which in turn ensures a high return of the target core when processing rice grain for

rice factory.

the invention

Formula

  The method of drying rice-turf, which consists in supplying a heat carrier to the free grain, has been done so that, in order to reduce the formation of treshin in the grain during the drying process, the grain is preheated without drying from it, moisture, then the grain is washed with a coolant of the state of equilibrium with it, after which the grain is dried with an unaffected drying agent, then the grain is again washed with a uniformly balanced coolant and the grain is dried with an unstable wetting agent to a predetermined humidity.

Sources of information taken into account in the examination

1. Ulrich N.N. and others. Installation for sUSHKI grain abroad. M., Selskokhoz Yednana literature / 1963, p. 81-82.

Claims (1)

Claim A method of drying rice sod, which consists in supplying heat to a free-flowing grain ’· carrier, heating, and so on. that, in order to reduce the formation of '.. I cracks in the grain during the drying process, the grain is preheated without evaporating moisture from it, then the grain is washed with a coolant with an equilibrium state with it, then the grain is dried with a moistened drying agent, then the grain is again washed with an equilibrium coolant with it state and dry the grain with an moistened drying agent to a predetermined humidity.