Problem Analysis and Operation Evaluation of Dry Ash Removal System in Coal-fired Power Plant

Abstract

In this paper, a 600MW unit is selected as the research object. Firstly, the ash output of each ash production equipment and the ash output of the corresponding dry ash conveying system are calculated. Then, the operation situation and problems of the dry ash conveying system are comprehensively evaluated by means of the ash conveying control mode and the calculation of the ash conveying compressed air output. Finally, the transformation and operation suggestions are put forward to form an analysis method of dry ash conveying system. Through the calculation of ash production and dry ash output, the overall design output of the dry ash conveying system meets the existing coal quality requirements, but the ash conveying capacity of each ash transmission pipeline is quite different; the ash delivery time and gas consumption of the two sets of gas sources are different, and the design output of the air compressor itself is insufficient, which affects the overall output of the dry ash conveying system and is easy to block the pipe; it is recommended to adjust operation parameters of the dry ash conveying system, improvement of pressure and air volume of compressed air system, adjustment of boiler combustion for reduction of carbon content in fly ash, redesign and reconstruction of pipeline.