Novel internal circulation type grain drying tower

Abstract

The invention discloses a novel internal circulation type grain drying tower. The novel internal circulation type grain drying tower comprises a first-section drying bin and a second-section drying bin, wherein to-be-dried grains enter the first-section drying bin from a first-section grain inlet, pass through the first-section drying bin and then are discharged from a first-section grain outlet;the discharged grains are lifted to a second-section grain inlet through a lifting machine, pass through the second-section drying bin and then are discharged from a second-section grain outlet; partof cold air entering from an air inlet enters a second-section hot air duct, is heated and then flows to a second-section drying section; part of cold air entering from the air inlet enters a coolingsection through a cold air duct; hot air passing through the second-section drying section and the cooling section enters a mixed air duct and then flows to a first-section hot air duct; the grains are heated again and then are introduced into the first-section drying section and a first-section drying section; air passing through the first-section drying section is converted into waste gas to bedischarged; hot air flowing out of the first-section drying section sequentially passes through a waste heat air duct and a preheating air duct and enters a preheating section; and finally waste gas is formed and discharged. According to the novel internal circulation type grain drying tower, heat is recycled, and heat loss in the grain drying process is reduced.

Description

technical field [0001] The invention relates to the technical field of grain drying equipment, in particular to a novel internal circulation grain drying tower. Background technique [0002] my country's total annual grain output has reached 600 million tons, but the high-moisture grains after harvest have not had time to dry and have not reached safe storage moisture, resulting in 5% of the losses caused by mildew, germination, and deterioration in storage, transportation, and processing. About 60 billion catties, the economic loss is as high as about 50 billion yuan per year, and the grain loss is more serious in the years with abnormal climate in the south and north. In recent years, due to the improvement in the understanding of grain drying and the promotion of agricultural machinery promotion and subsidy policies, grain drying machinery has been popularized and applied rapidly, but the proportion of mechanized drying of the total grain is less than 30%, and a core leadi...

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Problems solved by technology

[0002] my country's total annual grain output has reached 600 million tons, but the high-moisture grains after harvest have not had time to dry and have not reached safe storage moisture, resulting in 5% of the losses caused by mildew, germination, and deterioration in storage, transportation, and processing. About 60 billion catties, the economic loss is as high as 50 billion yuan per year, and the food loss is even more serious in the years with abnormal climate in the south and north

In recent years, due to the improvement in the understanding of grain drying and the promotion of agricultural machinery promotion and subsidy policies, grain drying machinery has been popularized and applied rapidly, but the proportion of mechanized drying of the total grain is less than 30%, and a core leading technology has not yet been formed.

Drying technology is still relatively backward. At present, more than 99% of grain dryers in my country have a series of problems such as high drying cost, large heat loss, and no exhaust gas waste heat recovery. Traditional dryers are arranged vertically. After drying, simmering and cooling, the dry food is discharged directly from the bottom

After the hot air in this structure enters the tower to dry the grain, the waste gas is directly discharged to the atmosphere on both sides, and most of the heat is lost. Although some equipment leads the waste gas out through the pipeline for recycling, the recovery also causes the loss of the tower temperature, making the overall equipment Reduced efficiency

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