Two-stage airflow powder material drying device

Abstract

The invention relates to a drying device, in particular to a double-level airflow powdery material drying device. The double-level airflow powdery material drying device comprises a vertical drying pipe, a induced draft fan, a pulverizer, a mixer and a spiral feeder; the induced draft fan is connected to the bottom end of the vertical drying pipe through an air inlet pipe, the pulverizer is arranged in the pipe located at the joint, the mixer is arranged on the side face of the vertical drying pipe through the spiral feeder, the center of the vertical drying pipe is an expansion portion, and the top end of the vertical drying pipe is connected with a discharge hole through a discharge pipe; an inlet air temperature sensor is arranged on the air inlet pipe, a discharge temperature sensor is arranged on the discharge pipe, and the inlet air temperature sensor and the discharge temperature sensor are connected through a circuit and the spiral feeder. According to the double-level airflow powdery material drying device, the drying time of material granules is increased, the hot gas around the material granules is increased, secondary smashing of the material granules in the pipe is achieved, therefore, the drying degree of powdery materials is improved, clustering phenomenon is avoided from occurring, the fact that the powdery materials cannot be polluted by the outside world is guaranteed, and the product quality is improved.

Description

technical field [0001] The invention relates to a drying device, in particular to a two-stage airflow powder material drying device. Background technique [0002] In the fields of pharmacy, chemical industry, food, grain processing, etc., the processed materials are mostly processed into powders, and the powdered materials must be very dry to meet the quality standards, so the powdered materials must go through a strict drying process before they leave the factory. Circulation field. Most of the existing drying devices for powdery materials are horizontal fluidized dryers, which include a fluidized bed host, a cyclone separator, and a high-pressure centrifugal fan. The feeder also enters the fluidized bed, and the wet material forms a boiling state under the action of the hot air, so that the hot air and the wet material are in extensive contact to achieve the purpose of drying. After tens of seconds to several minutes of boiling and drying, the powdery material from boilin...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the defect that the existing drying device does not dry the powdery material thoroughly and is easy to agglomerate, and to invent a two-stage airflow powdery material drying device in which the powdery material is decelerated and then falls back and crushed repeatedly.

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