Method for adjusting and uniform controlling temperature in each return stroke of multi-return stroke roller drier

Abstract

The invention relates to a multi-return stroke roller drier capable of separately adjusting and evenly controlling the temperature of the heated airflow. The drier comprises a combustion furnace, a multi-return stroke roller drying device, a dust-removing device and an induced fan, wherein the hot air leading-in end of the multi-return stroke roller drying device is provided with a facility used for distributing wind, adjusting temperature and evenly controlling temperature, the facility comprises an air distribution flow regulating valve, an air distribution choke group, an outer mixing air duct, a middle mixing air duct, an inner air duct, a grading air distribution ring, a temperature sensor group, an industrial personal computer(IPC), a servo amplifier and a servo motor; the outer mixing air duct, middle mixing air duct and inner air duct are separately communicated with the air distribution flow regulating valve, the grading air distribution ring, the air distribution choke group and each roller of the multi-return stroke roller drier; and the temperature sensor and the IPC performs the closed-loop regulation and control of the servo motor through the servo amplifier. The invention can realize that the temperature of the heated airflow of each return stroke roller of the multi-return stroke roller drier can be separately regulated and evenly controlled and solve the problem of regulating and evenly controlling the temperature of moving airflow of the multi-return stroke roller drier. The method is applicable to the temperature stage regulation and stable control of the material drying process of the multi-return stroke roller drier with over two return strokes.

Description

technical field [0001] The invention relates to a drying machine, in particular to a multi-return drum drying machine capable of separately adjusting and uniformly controlling the temperature of the heating air flow. Background technique [0002] The multi-return drum material dryer, with its compact structure, long heating process, good process performance and high heat preservation efficiency, has been widely used in mineral processing, coal upgrading, cement sintering, chemical raw material manufacturing, grain and medicinal material drying and other industries. The wider the application. [0003] Taking the three-pass drum dryer for coal upgrading as an example, its traditional structure is as follows: figure 1 As shown, it is mainly composed of a combustion furnace, a three-pass drum drying device, dust removal equipment and an induced draft fan. The so-called three-pass drum drying device is mainly composed of three layers of stacked drums, deflectors and lifting pla...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the heating temperature of the traditional multi-return drum dryer cannot be controlled in sections, and to provide a method for separately adjusting and uniformly controlling the temperature of each return of the multi-return dryer to meet the dehydration of special materials drying requirements

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