Solutions To Problems Of The Bucket-wheel Stacker Recaimers In Northern Cold Area

With the development of information society, electrical power equipment has been more and more towards digitization, informationization and intelligentialization. How to make use of these devices efficiently and conveniently is a direction for our research. A boom-type bucket wheel stacker reclaimer in a power plant of Daqing area shoulders the task of taking and discharging coal in the coal yard. In the half-year-long low temperature of the northeast Daqing, the reclaimer is frequently used and as a result electrical failure rate is high, which becomes the most important problem in the power plant’s safe production.Therefore, to find and solve the problem of electrical faults of the bucket wheel stacker reclaimer in northern cold areas has been an imminent problem. In view of the above problems, this power plant implemented the research on these problems and their solutions.This paper first introduces the basic knowledge of stacker reclaimers such as their composition, working principles, operation methods and the causes and handling of the faults. And then by analyzing the cause of the failure of that bucket wheel stacker reclaimer in Daqing, we conclude that the electrical failures account for80%of reclaimers’faults. The main causes of the malfunction are as follows:in cold boot, due to excessive starting current and overload of motors; the PLC and frequency converter are unable to work normally. The cold northern winter shortens the service life of the stacker’s power cables. After finding out the problems, through analysis and demonstration, the technicians decided to install the the ACS800-04M-0210-3inverter in the primary circuit of the stacker reclaimer; And heating reform was carried out in the walls of distribution rooms of layer one and two, bucket forearm, tail and auxiliary tail reducers. Through the self-made equipment, the cables’service life has been prolonged. Through the transformation of the electrical equipments, after running test, the reclaimer’s electrical fault rate was reduced to20%after the transformation and thus greatly improved the stability of bucket wheel stacker in the north area and also guarantee the smooth operation of the coal-fired power plant in northern area.