Heat pump tower type vacuum drier

Abstract

The heat pump tower type vacuum drier contains vacuum drying silo, vacuum pump and heat pump. Inside the vacuum drying silo, the inner cavity is provided with continuous to-and-for heat medium flow passage as the condensing pipe of the heat pump condenser and with two ends connected with the heat pump. The vacuum drying silo has vacuum pumping pipe communicated with the vacuum pump via the heat pump evaporator, which has evaporating pipes and water outlet pipe. The present invention has heat pump condenser installed inside the drying silo to supply heat to the material directly in high heat efficiency, and the pumped out water vapor is condensed fast in the condensing pipes in greatly power consumption, so that the present invention has high energy utilizing efficiency and is favorable to environment protection.

Description

1. Technical field: [0001] The invention relates to crop drying equipment, in particular to a heat pump tower type vacuum drying device. 2. Background technology: [0002] my country is a large agricultural country, and the output of crops is huge. If they are not stored well, they will deteriorate. Therefore, it is necessary to reduce their moisture content before storage. At present, the traditional drying method mainly adopts hot air drying equipment, which makes the hot air pass through the crop particles under normal pressure to evaporate its moisture. The drying methods are usually cross flow, mixed flow and forward (counter) flow, but this drying method , it is easy to damage the inherent quality of crops. Taking dry corn as an example, the temperature of hot air is generally 120-160°C, while the natural temperature in the dry season in Northeast China is -5--30°C. Due to the huge temperature difference, the corn is dry During the process, its internal structure is d...

AI Technical Summary

Problems solved by technology

However, the defects of this equipment are: heating and condensation depend on the boiler and cooling tower respectively, the building area is large, the investment is large, the efficiency is low, the energy waste is serious, and the use of the boiler at the same time is not conducive to environmental protection

Chinese patent (authorized announcement number is CN2503437Y, patent number is 01268530.5) discloses a kind of " vacuum heat pump drying device ", and it comprises a drying box, and the box machine of a heat pump device is installed in the box of this drying box, and the box outside An out-of-box unit equipped with a heat pump device, the out-of-box unit is connected to the in-box unit through pipes, and there is a water injector whose throat is connected to the valve through a check valve and a pipe, and the other end of the valve is connected to the box through a pipe , the inlet of the water jet is connected to the outlet of the high-pressure water pump through a high-pressure pipe, and the inlet of the water pump is connected to the water tank by a water pipe and a connecting valve. The device uses heat pump heating to reduce environmental pollution, but it also has some defects: Heat pump and cooling water, a lot of investment, serious waste of energy

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