Airflow grader

Abstract

The invention discloses an airflow grader, which belongs to the technical field of solid powder grading equipment and comprises a grading impeller driven by a power device. A cyclone barrel is sleeved on the periphery of the grading impeller, grading airflow flows through the cyclone barrel, a feeding opening at the position corresponding to that of the grading impeller is arranged at the top of the cyclone barrel, an air inlet is arranged on the cyclone barrel, a material grading cavity is formed between the cyclone barrel and the grading impeller, an inner barrel is disposed below the grading impeller, a sealing device is disposed between the inner barrel and the grading impeller, a fine powder discharge opening is arranged at the bottom of the inner barrel, the lower side of the cyclone barrel is hermetically connected with an outer barrel surrounding the inner barrel, a coarse powder discharge opening is arranged at the bottom of the outer barrel, materials are graded by the structure and drop in the grading cavity from the feeding opening by the aid of gravity, only one cyclone barrel and the grading impeller are used for separating coarse powder from fine powder, and the airflow grader is simple in structure, stable in performance and low in energy consumption.

Description

technical field [0001] The invention relates to a solid powder classifying device, in particular to an airflow classifier. Background technique [0002] The classification principle of the current air classifier is usually to send the material to the classification chamber, and the classification chamber uses the cooperation of the classification airflow and the classification wheel to classify the material. In order to improve the classification effect, many classifiers usually use the second air intake, or even the third air intake. , or use two or more classifying wheels, resulting in a more complex structure of the whole machine, and higher energy consumption, and for some materials that require lower classification fineness, it is wasteful to use a high-precision air classifier, The feed inlet of some air classifiers is located below the classifying chamber, so a large air flow is required to make the powder reach the sub-chamber, which consumes a lot of energy. Conte...

AI Technical Summary

Problems solved by technology

[0002] The classification principle of the current air classifier is usually to send the material to the classification chamber, and the classification chamber uses the cooperation of the classification airflow and the classification wheel to classify the material. In order to improve the classification effect, many classifiers usually use the second air intake, or even the third air intake. , or use two or more classifying wheels, resulting in a more complex structure of the whole machine, and higher energy consumption, and for some materials that require lower classification fineness, it is wasteful to use a high-precision air classifier, The feed inlet of some air classifiers is located below the classifying chamber, so a large air flow is required to make the powder reach the sub-chamber, which consumes a lot of energy.

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