Stacked double-circulation low-temperature drying system, using method and application

Abstract

The invention belongs to the field of drying systems, and particularly relates to a stacked double-circulation low-temperature drying system. The drying system is a system with forward Carnot cycle heating and reverse Carnot cycle refrigeration and dehumidification functions. The stacked double-circulation low-temperature drying system comprises a first refrigerating system, a second refrigerating system, a circulating fan and an air distribution and guide plate, a group of first condensers, first evaporators and second evaporators are arranged on each of the two sides of the circulating fan; a first gas-liquid separator and a first refrigeration compressor of the first refrigeration system are sequentially connected with the first condensers; a second gas-liquid separator and a second refrigeration compressor of the second refrigeration system are sequentially connected with second condensers; and the air distribution and guide plate is arranged in a drying chamber. The drying system has the following advantages that the safety of materials to be dried is high, and a mildew phenomenon is avoided; the loss of nutritional ingredients is low; the energy consumption is reduced; and the drying system has the characteristics that he drying speed is high, the drying speed is consistent, and the environment is protected.

Description

technical field [0001] The invention belongs to the field of drying systems, and in particular relates to a superimposed double-cycle low-temperature drying system. The drying system is a system with forward Carnot cycle heating and reverse Carnot cycle refrigeration and dehumidification functions. Background technique [0002] At present, the drying of Chinese herbal medicines, aquatic products, fruits and vegetables and other products mainly adopts several methods such as air drying, natural drying, natural gas heating drying, electric heating drying, heat pump drying and vacuum freeze drying. [0003] Drying refers to placing the materials to be dried indoors, adopting fan forced ventilation, introducing outdoor air into the room and discharging the humid air generated by the indoor materials to be dried to the atmosphere, although the drying temperature required by the above drying methods is relatively low, The loss of nutrient components of the material to be dried is...

AI Technical Summary

Problems solved by technology

When the freezing temperature of the material to be dried reaches -30°C, only 97% of the water freezes. To make 100% of the water in the material to be dried freeze, it needs to reach -60°C. The loss of active ingredients and nutritional ingredients of dried materials does not exceed 5%, but the energy consumption of the refrigeration system is extremely high, coupled with the vacuum environment, the initial investment is expensive. At present, it is only used in special fields such as medicine and microbiology.

[0008] In summary, if the bottleneck of the existing technology can be overcome, a low-temperature drying device with a relatively low drying temperature, which is not affected by ambient weather during the drying process, has a refrigeration system evaporator for dehumidification, and can achieve 100% waste heat recovery , it can solve the problem of low efficiency of traditional drying and natural drying, and the corruption and deterioration of materials to be dried, solve the problem of loss of active ingredients and nutritional value of materials to be dried in natural gas and electric heating drying methods, and solve the high drying temperature of heat pumps , the inability to perform full heat recovery, the loss of active ingredients and nutritional value is still relatively large, the drying speed is slow, and the efficiency is still low, which can solve the problems of existing drying methods such as high energy consumption in vacuum freeze-drying operation and high initial investment. All problems, then it will play a huge role in promoting the drying of Chinese herbal medicine, aquatic products, fruits and vegetables, grain and other fields, and it will also help reduce the expensive cost and investment of fresh storage and transportation links.

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