An energy-saving zonal belt dryer

Abstract

The invention discloses an energy-saving partitioned belt dryer which comprises a shell, wherein a conveying belt is mounted in the shell; the conveying belt comprises a first temperature area arranged at a feeding end and a third temperature area arranged at a discharging end, the first temperature area is provided with a first-area air inlet duct and a first-area air outlet duct, and the third temperature area is provided with a third-area air inlet duct and a third-area air outlet duct; the first-area air outlet duct is connected with the third-area air inlet duct, and the first-area air inlet duct is connected with the third-area air outlet duct; the first-area air inlet duct is provided with a heat exchanger and a fan, and tail gas exhausted by the third-area air outlet duct is sucked into the first-area air inlet duct after being heated; the first-area air outlet duct is provided with an air exhaust door used for regulating the flow of the exhausted tail gas; a heat exchanger and a fan are arranged at the air inlet end of the third-area air inlet duct, and an air inlet door used for regulating the flow of incoming air is arranged at the air inlet end of the heat exchanger. The third temperature area utilizes the heat of the tail gas exhausted by the first temperature area, so that the energy-saving partitioned belt dryer conforms to the characteristic of material drying, provides reasonable energy for materials in different drying stages, improves the drying efficiency, reduces energy consumption, and reduces the damage to nutrient elements of the materials.

Description

technical field [0001] The invention relates to a belt dryer, in particular to an energy-saving partition belt dryer, and belongs to the field of grain feed (especially aquatic product and pet feed) processing equipment. Background technique [0002] At present, belt-type hot air dryers are commonly used in the feed industry. The structure of this type of dryer includes a distributor (responsible for feeding and spreading the material), a feeding and returning section (responsible for returning the material and removing powder), and a conveyor belt. (responsible for carrying and transporting materials), drying section (including fans responsible for removing moisture from materials), feet (responsible for supporting the whole machine), air intake and exhaust outlets (responsible for filling in fresh air and discharging material moisture out of the drying machine), Heating system (responsible for providing the heat required for material drying). Similarly, the drying princip...

AI Technical Summary

Problems solved by technology

[0005] The other is a dryer that is partitioned for partitions. Generally, it is also divided into 3-4 zones. The air intake and exhaust of each zone are independent of each other. The energy is not fully utilized, and the energy-saving effect of the dryer is not obvious.

The influence of air flow on moisture uniformity is also not taken into account, and the unbalanced arrangement of air outlets on the dryer has an unbalanced influence on both sides of the material layer, resulting in the phenomenon that the moisture content of the material on the side of the dryer is always low

Some partition dryers do not even have a reasonable sealing structure, and the airflow in the dryer has cross-flow or even short circuit, which leads to increased energy consumption and poorer moisture uniformity

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