SU1374018A1 - Drying installation - Google Patents

Abstract

The invention relates to installations including a heat pump in which air serves as a drying agent. and m. used in agriculture for grain drying. The purpose of the invention is to increase the efficiency of the installation. For this, the circulation system of the drying and cooling agents is designed as a single closed loop. In this circuit, the drying chamber 1 is installed along the agent between the condenser 4 and the evaporator 3, and the cooler 2 between the evaporator 3 and the condenser 4. In the cooler 2, the cold air (cooling agent) assimilates the excess heat contained in the dried grain, carries it away into the air duct 9, then enters the condenser 4, is heated therein, enters the blower and further to the inlet of the drying chamber 1. 1 sludge. ((/) 00 Jib QG

Description

The invention relates to a drying technique, namely, installations including a heat pump, in which air is a drying agent, and can be used in agriculture for drying grain.

The purpose of the invention is to increase efficiency,

Figure 1 shows schematically a plant for drying grain.

The installation contains a drying chamber 1 and a cooler 2 connected in series to the material being dried, a heat pump with an evaporator 3, a condenser 4, a throttle 5 installed in the refrigerant line 6 between the condenser 4 and the evaporator 3, and with a compressor 7 installed in the refrigerant line 8 between evaporator and condenser. The installation also contains a circulation system for drying and cooling; its agents are made in the form of a single closed loop with duct 9, in which condenser 4 and air blower 10 are installed, and with duct 11, in which evaporator 3 and condensate collector 12 are installed. The drying chamber 1 is installed along the agent between the condenser 4 (after the blower 10) and the evaporator 3, and the cooler 2 between the evaporator 3 (after the condensate collector 12) and the condenser 4.

The installation works as follows.

Grain to be dried is supplied to the drying chamber 1, and the drying agent (air) is injected into the chamber by an air-blower 10. Dry warm air assimilates the moisture contained in the grain, partially cools and enters the air duct 1 1 and then

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9

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the receiver 3, where it releases heat (including the heat of condensation of water vapor) to the evaporating coolant circulating in lines 6 and 8 of the heat pump, and loses moisture in the condensate collector 12, which drains it into the sewer system.

Next, the cooled air enters through the ducts 11 to the inlet of cooler 2. In cooler 2, cold air (cooling agent) assimilates the excess heat contained in the dried grain, which flows by gravity from drying chamber 1, and carries it to duct 9, enters condenser 4, is heated in it, the heat of condensing refrigerant vapor (its humidity at this sharply decreases) and enters the blower 10 and further to the inlet of the drying chamber 1.

Claims (1)

Invention Formula A drying unit comprising a drying chamber and a cooler sequentially connected to the material being dried, a heat pump with an evaporator and a condenser, and a circulation system of the drying and cooling agents connected to the drying chamber and the cooler associated with the evaporator and the heat pump condenser, characterized in that In order to improve efficiency, the circulation system of the drying and cooling agents is made in the form of a single closed loop, in which the drying chamber is installed along the agent between condenser and evaporator, and the cooler is between the evaporator and the condenser.