Pulverized coal injection device for sintering tunnel kiln of brickyard and control method

Abstract

The invention discloses a pulverized coal injection device for a sintering tunnel kiln of a brickyard and a control method. The pulverized coal injection device comprises a small pulverized coal bin,a coal conveying pipeline, an electromagnetic valve, a coal conveying fan, a frequency converter, the tunnel kiln, a temperature measurement detection element and a computer control unit. The temperature measurement detection element is arranged on the sintering tunnel kiln, sintering thermal parameters in the kiln are detected, is transmitted to the computer control unit and then are compared with a preset ideal firing temperature curve, a signal is output after judgment and comparison to control the pulverized coal injection device on the kiln to operate, pulverized coal is automatically added from a coal feeding hole in the top of the kiln through the pulverized coal injection device, the thermal parameters and the combustion atmosphere of the tunnel kiln are controlled, full-automaticcoal feeding of the top of the tunnel kiln is achieved, and manual coal feeding widely adopted at present is replaced. According to the pulverized coal injection device, automatic closed-loop controlis achieved through a computer, and therefore the purposes of reducing consumption and improving the yield and quality are achieved.

Description

technical field [0001] The invention relates to an automatic pulverized coal injection device and a control method for a sintering tunnel kiln in a brick factory, and belongs to the technical field of electromechanical integration industry. Background technique [0002] At present, with the increase of the annual output of sintered hollow bricks, the section of the tunnel kiln increases correspondingly, resulting in the unbalanced temperature of the section, the larger temperature difference, the lower quality of sintered hollow bricks, and high coal consumption. While the output is increasing, higher requirements are put forward for product quality and energy consumption. [0003] The overall self-control level of domestic sintered brick factories is not high. As an important production link, the coal injection point at the coal injection hole of the tunnel kiln has not been given a good solution at home and abroad. Most wall materials have multiple coal injection holes in ...

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Problems solved by technology

[0003] The overall self-control level of domestic sintered brick factories is not high. As an important production link, the coal injection point at the coal injection hole of the tunnel kiln has not been given a good solution at home and abroad. Most wall materials have multiple coal injection holes in the tunnel kiln. Relying on the experience of workers to add coal in intervals has become more and more obvious as the "bottleneck" problem in the application of production line automatic control system technology, which not only wastes energy consumption, but also cannot guarantee a high-quality firing environment

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