SU1566183A1 - Unit for drying and cooling grain products - Google Patents

Abstract

The invention relates to the storage of agricultural products and can be used for drying and cooling of grain and its processed products. The purpose of the invention is to reduce the cost of producing cold and improving the efficiency of the drying process. The plant for drying and cooling of grain products contains a grain cooler 1 with an air-distributing device 18, a supply and discharge connections for grain and air, a refrigeration machine 8, an air cooler 7 with a pipe 13 for cooling air and the fan 6. New in the installation is the presence of a surface heat exchanger 15 in the cooler 1 of the grain, connected to the pipeline 13 of the cooled air and the air-distributing device 18. The suction inlet 5 of the fan 6 is connected to the outlet 4 of the exhaust Air cooler 1 grain, 1 Il.

Description

The invention relates to the storage of agricultural products and can be used for drying and cooling of grain and its processed products.

The purpose of the invention is to reduce the cost of producing cold and improving the efficiency of the drying process.

The drawing shows the installation, general view.

The plant contains grain cooler-1 with holes 2 and 3 for loading and unloading an ernoproduct, exhaust exhaust pipe 4 connected to the suction pipe 5 of the fan 6, which forces air to the air cooler 7 of the refrigerating machine 8, having an evaporator 9, compressor 10, condenser 11 and throttle 12. The air cooler 7 is connected to the inlet 14 of the surface heat exchanger 15 through the pipe 13 of the cooled air outlet 13, whose outlet 16 is connected to the inlet 17 of the air distribution flax device 18 cooler 1 grain. Pipeline 13 is equipped with shut-off valves 19-21.

The installation works as follows.

Due to the 6 tons of gas created by the fan, air is supplied to the air cooler 7, where part of the heat is removed from it due to the processes occurring in the evaporator 9 of the refrigerating machine 8. At the same time, it cools to a temperature close to the boiling point of the refrigerant, its moisture content is reduced and the relative humidity increases, sec to 95-100%. The cooled air with high relative humidity through the pipeline 13 flows through the inlet 14 into the surface heat exchanger 15. Here, at a constant moisture content, some of the heat from the grain product is supplied to the air, 10

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The cabins 16 and 17 are fed into the air-distributing device 18, are evenly distributed over the entire cross-section of the grain cooler 1 and rise up, where through the exhaust exhaust pipe 4 it enters the suction pipe 5 of the fan 6 and then either is vented to the atmosphere or to the corresponding heat utilizing installations. Initial

the grain product enters the upper part of the cooler 1 of the grain through the loading opening 2 and moves downwards under the action of gravity. When contacting with a counter flow of cooling air through the air distribution device 18, and then with the surface of the heat exchanger 15, the energy product loses heat, is cooled and through the discharge opening 3 is removed from the grain cooler 1.

The use of the installation makes it possible to establish the required relative humidity of the air before it is supplied to the grain cooler by removing part of the heat from the cooled product by the surface heat exchanger. This allows, without reducing the boiling temperature of the refrigerant, to reduce the initial temperature of heat removal from the grain product, or, equivalently, at a constant initial temperature of heat removal from the grain product, to increase the boiling temperature of the refrigerant, which in turn, at a constant temperature of the cooled grain, reduces the required the cooling capacity and energy consumption of the compressor drive, i.e. reduce the cost of getting cold.

Claims (1)

Formula of invention 25 thirty 35 40 A plant for drying and cooling of grain products containing a grain cooler from the air distributor through the loading opening with a loading device and extractor 2 into the cooler of 1 grain. At the same time, with the cooling openings, the pipes for the supply of cooled air and exhaust, the refrigerating machine with The air temperature increases by 3-7 ° C, and the relative humidity is lower. five 0 The cabins 16 and 17 are fed into the air distribution device 18, are evenly distributed over the entire cross section of the grain cooler 1 and rise upwards, where through the exhaust exhaust pipe 4 enters the suction pipe 5 of the fan 6 and then either is vented to the atmosphere, or to the corresponding heat sources. installations. the initial the grain product enters the upper part of the cooler 1 of the grain through the loading opening 2 and moves downwards under the action of gravity. When it comes into contact with a counter flow of cooling air through the air distribution device 18, and then with the surface of the heat exchanger 15, the energy product loses heat, is cooled, and through the discharge opening 3 is removed from the grain cooler 1. The use of the installation makes it possible to establish the required relative humidity of the air before it is supplied to the grain cooler by removing part of the heat from the cooled product by the surface heat exchanger. This allows, without reducing the boiling temperature of the refrigerant, to reduce the initial temperature of heat removal from the grain product, or, equivalently, at a constant initial temperature of heat removal from the grain product, to increase the boiling temperature of the refrigerant, which in turn, at a constant temperature of the cooled grain, reduces the required the cooling capacity and energy consumption of the compressor drive, i.e. reduce the cost of getting cold. five 0 five 0 Formula of invention It is compressed to values lower than its equilibrium value, determined by the humidified cool air and by the ventilation of the cooled grain product. From the surface heat exchanger 1 5, cooling air, having a predetermined relative humidity, through the pator tor, characterized in that, in order to reduce the cost of producing cold and increase the efficiency of the drying process, the cooler air cooler and piping L torus, characterized in that, in order to reduce the cost of producing cold and increase the efficiency of the drying process, the cooler 515661836 the grain is provided with a surface heat-distributing device for the cooling-exchanger, the inlet pipe of which is a grain diter, while the suction pipe is connected to the exhaust pipe of the fan’s air pipe connected to the condensed air from the air-cooling system and the exhaust pipe from the air from the grain cooler.