Pneumatic drying device of circulating fluidized bed

Abstract

The invention discloses a pneumatic drying device of a circulating fluidized bed. According to the pneumatic drying device, a draught fan (1), a circulation pipe I (2), a dust remover (4), a regulating valve (5), an air inlet tee joint (6) and a circulation pipe II (7) form a circulation passage. The draught fan (1) sucks airflow in through the air inlet tee joint (6). Under the action of the airflow, materials are in a fluidization state and flow in the circulation passage at a high speed, heat exchange and water exchange are rapidly carried out between the fluidized materials and the air, and then moisture is discharged out through an exhaust port of the dust remover (4). The process is carried out repeatedly until the moisture content of the materials meets the requirement.

Description

technical field [0001] The invention relates to an airflow drying equipment for granular materials and powder materials. Background technique [0002] Invention patent ZL2010101628876 describes a drying equipment for powder materials. The drying equipment includes a fluidized bed main cavity for materials to form a fluidized state and dry them, and a sieve cage for separating materials from moisture. The circulatory system of the fluidized material circulation and the backflushing system used to remove the materials accumulated on the sieve screen to block the sieve screen have the following shortcomings: First, the air velocity in the main chamber of the fluidized bed is not high, and the water content It is difficult for materials with high rate and high viscosity to effectively form a fluidized state here; second, materials are easy to deposit at the dead corners of the sieve cage; Gas discharge is slow. The above-mentioned shortcomings lead to poor fluidization state o...

AI Technical Summary

Problems solved by technology

[0002] Invention patent ZL2010101628876 describes a drying equipment for powder materials. The drying equipment includes a fluidized bed main cavity for materials to form a fluidized state and dry them, and a sieve cage for separating materials from moisture. The circulatory system of the fluidized material circulation and the backflushing system used to remove the materials accumulated on the sieve screen to block the sieve screen have the following shortcomings: First, the air velocity in the main chamber of the fluidized bed is not high, and the water content It is difficult for materials with high rate and high viscosity to effectively form a fluidized state here; second, materials are easy to deposit at the dead corners of the sieve cage; slow gas discharge

The above deficiencies lead to poor fluidization state of materials, poor circulation, low output of drying equipment, and processing of materials with high water content and viscous materials is also very difficult

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