The project will be undertaken by Mitsubishi Heavy Industries Environmental & Chemical Engineering Company (MHIEC), part of Mitsubishi Heavy Industries.
The Naka plant in Minamiyoshijima, Naka-ku, has a total waste treatment capacity of 600 tonnes per day and MHIEC will refurbish and improve the three stoker-type incinerators and related equipment, each with a capacity of 200 tpd that operate continuously 24-hours per day.
The aim is to enhance energy efficiency and extend the working life of the facility. The plant generates 15.2 MW of electricity to power the equipment in the factory, selling the remainder.
The renovation contract comprises the renewal of superannuated core components at the facility, including the receiving and feeding equipment, combustion facilities, exhaust gas cooling equipment, ventilation systems, ash extractors, and instrumentation. The renovation will incorporate MHIEC’s patented New Incineration Control System to support stable incineration, as well as the use of high-efficiency motors and inverters to increase energy efficiency. Upon completion, CO2à‚ emissions will be reduced by 9.6 per cent annually said MHI.
The refurbishment is expected to be completed in March 2023.
MHIEC acquired MHI’s waste to energy plant business in 2008, incorporating its accumulated technological development capabilities in environmental protection systems, and its expertise in the construction and operation of waste management facilities both in Japan and abroad.
Renovation of waste to energy plants in Japan is increasing as operators aim to extend the service life of facilities and reduce their environmental impact. The Japanese national government also established a related subsidy system in 2010, further accelerating this trend.