Mitsubishi Heavy Industries Environmental & Chemical Engineering Co., Ltd. has developed an advanced automated crane operation system for waste incineration facilities. This system considerably contributes to the facility's operational stability and a reduction in manpower, and can mitigate the effect of variable factors related to individual operators regarding waste receiving, feeding and mixing. Requiring hardly any human intervention during waste receiving and feeding processes, this system evaluates waste properties using a comprehensive scoring method based on three variables from three variables: (1) the number of mixings, (2) bulk density and (3) waste storage retention time. Automatic waste mixing is then carried out accordingly. Use of this automatic mixing has been confirmed to lead to a smaller standard deviation of lower heating values (LHV) of waste and less fluctuation of the main steam flow rate. Thus, this crane operation system contributes to stable combustion of the incinerator and can become an indispensable system for sustainable and stable operation of a facility.
