Circulating dryer for cereals

Abstract

The invention discloses a circulating dryer for cereals. The circulating dryer for cereals comprises a radiation drying section, a grain discharging section, a hot air drying section and a grain storing section, which are arranged on a base in sequence from the bottom up; a material circulating conveyer is arranged between the radiation drying section and the grain storing section; one side of the radiation drying section is communicated with a heat source that can produce a heat medium; an induced draft fan and an air mixing chamber are respectively arranged on two sides of the hot air drying section; the inlet of the air mixing chamber is communicated with a heat medium outlet of the radiation drying section; the outlet of the air mixing chamber is communicated with the induced draft fan through the hot air drying section. The circulating dryer has the advantages that not only can hot air drying be realized individually, but also hot air drying is organically combined with radiation drying, so that heat of the high-temperature heat medium is sufficiently used in high level and low level, the heat efficiency is high, the energy consumption is low, the drying is sufficient and uniform, the drying cost is low, the temperature is uniform, and the safety is good.

Description

technical field [0001] The invention relates to the technical field of grain drying, in particular to a novel grain circulation dryer. Background technique [0002] Drying is one of the most important processing stages in grain production. The so-called drying is the process of removing moisture from the material by means of heat supply, which is a complex heat and mass transfer process. In order to ensure the good quality of grain in drying operation, appropriate drying conditions and equipment must be selected to minimize the adverse effects of drying on grain quality. [0003] At present, the normal-pressure hot air drying using hot air as the medium for convective heat transfer is still the most widely used and most economical grain dehydration storage method, such as cross-flow grain dryers. The grain channel of the cross-flow grain dryer is a vertical grain channel made of two layers of vertical nets. The grain forms a layer of grain wall in the channel, and the grai...

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Problems solved by technology

[0006] After practice tests, the above-mentioned far-infrared drying device does not pass through the mesh plate and the grain layer well after the hot air generated by the oil furnace is mixed with the cold air in the hot and cold air mixing chamber, and then enters the infrared drying section through the hot air inlet. Most of them will go up along the gap between the mesh plate and the shell of the hot air drying section, so the grains cannot be dried well in the hot air drying section, and the cylinder type can not be fully utilized. There is a certain waste of heat energy in the residual heat energy discharged by the far-infrared radiator

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