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What is the working principle of the dehumidifying dryer?

source:Plastic pellet dryer
Author:plastic dryer
time:2020年11月10日 09:41:01

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The hot and humid air returned from the drying barrel is cooled and blown into the honeycomb runner. The moisture in the air is absorbed by the runner, and then desorbed by the regeneration heating air.
1. The two air streams act on the runner at the same time, and with the rotation of the runner, the moisture in the air is continuously absorbed and desorbed by the regeneration air to be discharged, forming a stable low dew point air. It is heated to the drying temperature of the plastic and blown into the drying barrel to form a closed loop to dry the raw materials.
2. In the suction part, the suction is sucked into the dry bucket from the storage bucket or other storage bin containers. When the reed switch of the vacuum hopper detects that there is no material, the suction motor runs to make the vacuum hopper produce vacuum.
3. The raw materials in the storage bucket are sucked into the vacuum hopper due to the air pressure difference. When the suction time is completed, the suction motor stops running, and the raw materials will fall into the drying bucket due to their own weight. The material barrel is drawn into the electric eye hopper installed in the plastic molding machine.
4. The internal circulation of the dehumidifier: through the operation of the compressor → discharge high-temperature and high-pressure gas through the exhaust port → enter the condenser for cooling → become a low-temperature and high-pressure gas → intercept the flow through a capillary tube → become a low-temperature and low-pressure liquid → evaporate and suck through the evaporator Heat → return to the compressor to become a low temperature and low pressure gas. So it goes back and forth.
5. The external circulation of the dehumidifier: under normal startup → through the operation of the fan → moist air is sucked in from the air inlet → passes through the evaporator → the evaporator absorbs the moisture in the air on the aluminum sheet → becomes dry air → Pass through the condenser to dissipate heat → blow out from the air outlet.

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