Isobaric grain-drying tower

Abstract

The invention discloses an isobaric grain-drying tower, belonging to the field of grain machinery. The tower body comprises a grain feeding layer, a grain storing layer, a drying bin, a cooling bin and a grain discharging layer which are laminated sequentially from top to bottom, wherein one side of the tower body is provided with a hot wind channel and a cold wind channel which are respectively as equal wide as the tower body; the other side of the tower body is provided with an exhaust gas channel as equal wide as the tower body; the cold wind channel is arranged at the inner side the hot wind channel; the lower end of the cold wind channel is provided with an atmosphere inlet; the upper side of the cold wind channel is provided with a cold wind outlet of the cold wind channel; the cold wind outlet of the cold wind channel is abutted with a cold wind inlet of the cooling bin; the lower end of the hot wind channel is provided with a hot wind inlet of a heat source; the upper end side of the hot wind channel is provided with a hot wind outlet of the hot wind channel; the hot wind outlet of the hot wind channel is abutted with the hot wind inlet of the drying bin; the cold wind outlet of the cooling bin and the hot wind outlet of the drying bin is respectively abutted with an exhaust gas channel; and the upper end of the exhaust gas channel is provided with an exhaust fan and an ash separating and discharging system. The wind resistance and the motor power consumption of the drying tower are small, and the wind quantity and the wind pressure of the hot wind or the cold wind are uniform, therefore, the quality of the dried grains is excellent.

Description

technical field [0001] The invention relates to grain drying equipment, in particular to an isobaric grain drying tower, which belongs to the technical field of grain machinery. Background technique [0002] In the field of grain processing and circulation, the precipitation drying of grain is usually completed through vertically arranged grain drying towers. The existing grain drying tower includes a frame and a drying bin and a cooling bin supported on the frame. The drying bin includes multiple drying layers stacked one after another, and each drying layer is respectively provided with staggered ventilation boxes. , the upper part of the drying bin is equipped with a material inlet and a hot air outlet, and the lower part of the drying bin is equipped with a material outlet and a hot air inlet. The hot air generated by the heat source is sent to the hot air inlet by the hot air blower through the hot air pipe; Below, the cooling chamber includes multiple layers of coolin...

AI Technical Summary

Problems solved by technology

[0004] The grain drying tower has the following disadvantages: 1. The cold and hot air medium are respectively sent to the cooling layer and the drying layer through the pipeline. The drying tower generally has a large air volume, and the wind speed in the pipeline is relatively large, and the wind resistance is roughly proportional to the square of the wind speed. Proportional, so there is greater resistance to the flow of cold and hot air media in the air duct, and the reverse flow of cold and hot air media in the drying tower and grain increases the wind resistance

This resistance is overcome by the wind pressure generated by the cold and hot fans. The power of the fan is proportional to the wind pressure. If the fan wants to generate a larger wind pressure, the power of the fan must be increased, resulting in an increase in drying energy consumption.

[0005] 2. Because the air inlet surface of the drying layer and the cooling layer has a certain cross-sectional size, the use of the air duct to supply air will cause uneven distribution of the air volume on the air inlet section, that is, the uneven air volume for heat and moisture exchange with the grain, resulting in The uneven moisture content of the grain after drying affects the quality of the grain after drying

[0006] 3. Grain is mixed with a large amount of marl, and at the same time, a large amount of dander will be produced during the flow of grain. The cold and hot air medium of the existing drying tower and the grain are exchanged for heat and moisture, and then directly discharged into the atmosphere through the exhaust port for drying. The dust generated in the process is discharged into the atmosphere driven by the drying exhaust gas, resulting in a bad working environment for the drying tower

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