A dual-stage regenerative solar-driven rotary drying system and its operating method

Abstract

The invention discloses a double-stage backheating solar driven rotary wheel drying system and a running method thereof. The system comprises a regeneration air inlet fan, a first heat tube backheating device, a heat storage device, a solar heat collector, a circulating working medium pump, an auxiliary electric heating device, a rotary wheel dehumidifier, a second heat tube backheating device, aregenerated air outlet fan, a drying chamber inlet fan, a drying chamber, a drying chamber outlet fan and the like. The rotary wheel drying system is driven by solar light heat, a heat storage technology is adopted, the shortcoming of intermittence of solar energy is overcome, energy consumption is reduced, and meanwhile, by arrangement of the auxiliary electric heater, the stability of the systemis ensured. A double-stage backheating technology is adopted, and thus, the utilization rate of energy is maximized. In addition, the system has an open running mode and a closed running mode, can beadjusted for drying requirements and working conditions, and is wide in application range.

Description

technical field [0001] The invention relates to the technical field of drying and dehumidification, in particular to a double-stage heat recovery solar-driven runner drying system. Background technique [0002] Agricultural and sideline products are the necessities of people's life, with the characteristics of large demand, many varieties and strong seasonality of production. At the same time, because many agricultural and sideline products are rich in nutrients such as water, sugar, protein and vitamins, they are prone to spoilage at room temperature . Therefore, the post-harvest drying treatment of agricultural products has gradually attracted people's attention. The coal-fired hot air drying room is the most widely used in the field of post-production drying of agricultural products in my country, which has many advantages such as simple equipment, convenient operation and moderate cost. However, hot air drying rooms are started intensively during the mature period of a...

AI Technical Summary

Problems solved by technology

The key reason lies in the defects of the heat pump drying device itself. First, the heat pump drying device is often designed as a closed structure. The circulating air is used as both the drying medium and the cooling medium for the condenser of the refrigeration system. The temperature rise of the circulating air causes the condensation pressure of the condenser to increase. As a result, the exhaust temperature of the refrigeration compressor rises, so that the high-voltage protection or overheating protection of the refrigeration compressor occurs frequently, and the heat pump drying device cannot work normally; The drying function is lost; in addition, the power supply in many parts of our country is still relatively tight, especially the agricultural power consumption during the peak period, which limits the application of heat pump technology

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