Heat recovery closed circulation rice drying system and method

Abstract

The invention discloses a heat recovery closed circulation rice drying system and method. The system comprises a drying room air system and a drying machine fluorine system, wherein the drying room air system comprises a drying room and an air duct, a conveying belt is arranged inside the drying room, the two ends of the air duct are connected with the upper end and the lower end of the drying room respectively to form a gas flow loop, an evaporator, an air blower, a second condenser and a centrifugal fan are sequentially arranged inside the air duct in the gas flowing direction, the drying machine fluorine system further comprises a compressor and a four-way valve, and the compressor is connected with the four-way valve. According to the heat recovery closed circulation rice drying systemand method, heat energy is recovered, the effects of being environment-friendly and energy-saving are achieved, the energy-saving efficiency is high, heat recovery is adopted to remove dust, energy waste is reduced, and the reliability and stability of system operation are ensure; and besides drying rice, domestic hot water can be manufactured, and after the rice is dried, the hot water mode is achieved through switching, and therefore, the machine can be used as a water heater, and the use efficiency of the machine is brought into full play by means of the one-machine-for-two-purpose mode.

Description

technical field [0001] The invention relates to the field of air source heat pump rice dryers, in particular to a heat recovery closed cycle rice drying system and method, which perform full heat recovery, have high drying efficiency, and save energy. Background technique [0002] Historically, most places in our country mainly planted rice, so the output of rice is also very large. When rice is harvested, it is too late to dry due to rainy days, causing the rice to germinate and suffer serious losses. In some places, there are many examples of rice damage caused by resurgence in granaries. With the development of the economy and the increase of per capita income, fewer and fewer people grow rice, so there will be large-scale contracted planting of rice, but it is unrealistic to use artificial drying of rice, because the labor cost is high now, and the artificial drying time is slow. The amount is small, the efficiency is low, and it is also affected by limited environmenta...

AI Technical Summary

Problems solved by technology

With the development of the economy and the increase of per capita income, fewer and fewer people grow rice, so there will be large-scale contracted rice planting, but it is unrealistic to use artificial drying of rice, because the labor cost is high now, and the artificial drying time is slow. The amount is small, the efficiency is low, and it is also affected by limited environmental conditions, so machine drying is the development direction

The traditional electric heating drying method consumes a lot of electricity, resulting in high cost and high energy consumption. Although the open-loop heat pump rice dryer saves electricity compared with traditional electric heating, since the open-loop drying is directly heated, and then The heat is discharged from the drying room, so the cost is still relatively high and the efficiency is relatively low. The existing heat pump rice dryers are open-loop, directly heated and dried, and there is no preheating and dust removal link, so the process is immature.

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