Wind direction-changing and temperature difference drying device for grain

Abstract

The invention discloses a grain drying apparatus, which comprises the following parts: a double layer heat-preserving steel board storage with side-to-side cylindrical shape, a hot-blast stove for providing the hot blast, a smoke cleaning and heat-recovering device, a delivery blast pipeline, an air stream direction changer, an electric fan and an electric control distribution system. The invention is characterized by the following: blowing the dried air in the got-blast stove by the positive pressure electric fan; entering the diffusing blast pipe by delivery blast pipe; inflowing the grain draught; absorbing the grain liquid-vapor by the negative pressure electric fan in the delivery blast pipe through the diffusing pipe; converting the air current direction timely by the air double-acting direction-change valve; converting the original delivery blast pipe of the grain storage air to the delivery blast pipe of discharging the wet air; making the air change the direction and flow in the storage. The device has the good drying effect, the simple structure, the low cost, which produces the good quality grain, and is fit for the different size grain processing mill.

Description

Technical areas: [0001] The invention belongs to drying equipment, and particularly relates to a grain drying device for processing agricultural products. Background technique: [0002] In the field of grain processing and production in the prior art, there are two main categories of grain drying equipment: one is tower dryers and fluidized bed drying equipment, both of which use hot air at 110 to 160°C for ventilation and drying. [0003] The main problems with these drying equipment are: First, the dried materials are unevenly distributed, which affects the drying effect. Because the grain will not be scattered in sequence and evenly during movement in the machine, or due to uneven grain flow speed or uneven spacing between grain particles, uneven heat exchange between the material and hot air will result, resulting in poor drying effect. ; Secondly, the thermal mass temperature is high and the contact time with the material is short, which affects the quality of the grai...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: to overcome the problems of poor drying effect, high investment cost and poor quality of dried grain in the existing grain drying equipment, and to provide a drying effect, simple structure, low equipment cost, high quality of processed grain, and Grain drying device suitable for large, medium and small grain processing enterprises

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