A cascaded countercurrent heat exchange grain dryer

Abstract

The invention discloses a reverse-flow type grain dryer which comprises an air blower, a hot-air blower, a hot blast heater, a deduster, a bucket elevator (9), a drying tower (1) and a grain discharge machine, wherein hot wind moves from the drying tower (1) against the bucket elevator (9); exhaust gases are emptied by a pre-heating barrel (10) after grains in grain receiving sprayers (16, 6, and 7) on a plurality of balance devices (15) filled with grains, which are supported by a supporting shaft (19) and arranged in the drying tower (1) and a grain bucket (14) of the bucket elevator (9) are dried; wet grains are discharged from a grain discharge outlet (13) after entering the drying tower (1) from a wet grain inlet (3) through the bucket elevator (9) and being dried on the grain receiving sprayers (16, 6 and 7). Flue gases enter the heating barrel (2) from a smoke inlet (12) in the root from the heating barrel (2) to heat the drying tower (1) and are emptied.

Description

technical field [0001] The invention relates to a countercurrent drying grain drying machine. It includes a blower for forming hot air drying, a dust collector, a hot air blower, a hot air stove, a drying tower, and a lifting and grain discharging device. Background technique [0002] As we all know, convective heat transfer is a form of mass transfer and heat transfer with high thermal efficiency, and the efficiency of countercurrent drying is high in grain drying. Drive out, countercurrent drying provides such a process condition. According to the CN201443948U public date of the State Intellectual Property Office of the People's Republic of China on April 28, 2010, the countercurrent heat exchange of this model prolongs the drying process and time, and improves the drying efficiency. Small, non-adjustable drying process and other defects. According to the Patent Office of the Intellectual Property Office of the People's Republic of China on May 26, 2010, the publication...

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Problems solved by technology

According to the Patent Office of the Intellectual Property Office of the People's Republic of China on May 26, 2010, the publication number is 101711534.B, and its patent number is CN200910222398 multifunctional grain dryer. Although this model is countercurrent drying, it is limited by the structure and ventilation Small quantity, low production capacity

None of the above existing technologies has formed a grain drying device that not only has countercurrent drying but also has a certain output and continuous operation, and there are problems such as uneven quality of dried products or low production capacity.

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