Sealed circulating flow heat exchange and cooling system for granary and cooling method thereof

Abstract

The invention provides a sealed circulating flow heat exchange and cooling system for a granary and a cooling method thereof. The sealed circulating flow heat exchange and cooling system comprises a heat exchanger, a ventilation machine and an in-granary ventilation pipe net, wherein a hot air channel in the heat exchanger, the in-granary ventilation pipe net and the ventilation machine jointly form an in-granary hot air closed circulation channel for isolating air outside the granary; a cold air channel in the heat exchanger and a strong convection fan form an open channel communicated with the atmosphere. When the temperature difference between the temperature of grains and the atmosphere reaches a pre-set startup value, the system is started up; in-granary hot air is internally circulated in the hot air sealed circulation channel through the ventilation machine, and cold air in the atmosphere is sucked by the strong convection fan from a cold air inlet of the heat exchanger and thenis exhausted from a cold air outlet through the cold air channel. The cold air of the atmosphere and the in-granary hot air are subjected to heat exchange in the heat exchanger and the in-granary hotair is cooled and then is returned back to the granary to realize the aim of cooling. When the system provided by the invention is used for cooling the granary, the system is not influenced by atmospheric humidity and the moisture of the grains is not influenced, so that the disadvantages of open type ventilation are overcome.

Description

technical field [0001] The invention belongs to the field of grain ventilation and storage, and in particular relates to a granary airtight circulation heat exchange cooling system and a cooling method thereof. Background technique [0002] Grain ventilated storage is the mainstream technology of grain storage at present, which provides reliable technical support for safe grain storage. The basic principle is that before the grain enters the warehouse, a ventilation pipe with densely distributed small ventilation holes (later referred to as a ventilation cage) is laid in the granary, or a ventilation trough is installed on the floor in the warehouse, and a ventilation pipe with densely distributed small ventilation holes is laid on the ground trough. The cover plate (hereinafter referred to as the trough cover plate) connects the ventilation duct or the ventilation slot with the ventilation opening set on the wall of the granary, and uses a blower to blow air into the granar...

AI Technical Summary

Problems solved by technology

In order to form a cold core with a lower temperature in the grain pile, it is necessary to fully ventilate the grain in winter to cool the grain. Because the northern grain depots are worried about excessive ventilation causing excessive moisture loss in the grain and are unwilling to ventilate too much, they cannot The low-temperature cold core is formed, which leads to the inability of the internal circulation temperature control technology to be fully implemented; the southern grain depot is worried that low temperature and humidity will increase the grain moisture and cause the water to rise beyond the standard and cannot be ventilated, so the role of the internal circulation temperature control technology cannot be fully utilized

[0011] The main reason why ventilation and temperature control storage technology and internal circulation temperature control technology cannot fully play their role is that the current ventilation method is an open ventilation and cooling method, which directly introduces external air into the grain pile, which also reduces the temperature of the grain during cooling. Water, too much water loss Storage enterprises cannot bear the economic loss, which makes enterprises unwilling to lower the temperature of grain to a lower temperature, which affects the safe storage of grain and also affects the maintenance of fresh quality of grain

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