Low-temperature grain storage method for low-temperature barn

Abstract

The invention discloses a low-temperature grain storage method for a low-temperature barn. A ground cage ventilation pipeline is paved on the ground of the barn; an under-film ventilation pipeline is arranged on the middle part of the barn; grains are piled in the barn in such a manner that a grain pile covers the under-film ventilation pipeline, and a grain mask covers the grain pile; the under-film ventilation pipeline is communicated with a grain pile negative-pressure circulating fan; the ground cage ventilation pipeline is connected with a grain pile positive-pressure circulating fan; when the temperature of air outside the barn is lower than the upper temperature limit value Tmax of grain low-temperature storage, natural air outside the barn is used for cooling; when the temperature outside the barn is higher than the upper temperature limit value Tmax of grain low-temperature storage, a refrigeration room is used for refrigerating in order that the temperature in the refrigeration room is lower than the Tmax, low-temperature air is supplied into the grain pile through the ground cage ventilation pipeline, and the low-temperature air flows through the under-film ventilation pipeline from bottom to top and enters the refrigeration room to be circulated continually. By adopting the low-temperature grain storage method, the low-temperature barn can be refrigerated more intelligently, the existing barn cooling machine is replaced, the refrigeration efficiency is increased, and the energy consumption is lowered.

Description

technical field [0001] The invention relates to the field of low-temperature grain storage, in particular to a low-temperature grain storage method for a low-temperature granary. Background technique [0002] Low-temperature grain storage technology is to apply machinery and automation technology with certain artificial intelligence to the process of grain storage. By controlling the temperature of grain piles during grain storage at a low temperature of 15°C or below a quasi-low temperature of 20°C, the grain will be delayed due to self-respiration. Grain aging and fission phenomenon caused by the action. However, the current grain storage method of low-temperature granaries mainly uses natural low-temperature mechanical ventilation to store grain combined with mobile grain cooling machines for emergency response. The cold air blows into the grain pile to cool the grain pile. However, this kind of refrigeration system has the following disadvantages: 1. The degree of auto...

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Problems solved by technology

However, this kind of refrigeration system has the following disadvantages: 1. The degree of automation is not low, and the labor intensity is high; 2. When the mobile cold grain machine is used, it needs to temporarily connect the cold air pipes, and these cold air pipes are exposed to the hot air outside the granary , so the energy consumption is very large, and the cooling efficiency is low; 3. After the grain piles are stored in winter, the temperature inside the grain piles is relatively low, and in summer, the temperature around the grain piles gradually rises due to external heat radiation, but the grain The temperature in the central area of ​​the pile is still at a suitable low-temperature storage temperature, generally below 15°C. At present, the cold air generated by the grain cooling machine will enter all areas in the grain pile, and in hot days, the cold grain The temperature of the cold air generated by the machine may be higher than the temperature of the central area of ​​the grain pile, so the central area of ​​the grain pile is actually heated up rather than cooled. Therefore, this method is unreasonable, not only increases energy consumption, but also is not conducive to Grain storage in the central area of ​​the grain pile

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