Under the newly concluded contract, the service life of Kagoshima's Hokubu WtE Plant will be extended through refurbishment of main equipment: including the waste receiving hopper as well as all equipment handling combustion, combustion gas cooling, flue gas treatment, waste heat recovery, ventilation, ash treatment, water supply and electrical instrumentation. To increase energy efficiency, high-efficiency motors and inverters will be newly adopted throughout the facility. The introduction of a low-temperature catalyst in the plant's desulfurization equipment, a proprietary technology of MHIEC, will enhance the facility's heat recovery ratio, while a low-air-ratio combustion system will improve combustion and enhance boiler efficiency. By increasing the steam turbine output from 8,700 kilowatts (kW) to 10,005 kW, CO2 emissions will be annually reduced by more than 10%, helping to curb global warming.
The Hokubu WtE Plant was originally designed and constructed by MHI. On completion in
MHIEC succeeded to MHI's environmental protection business in 2008, taking over its accumulated technological development capabilities in environmental protection systems as well as its broad expertise in the construction and operation of waste management facilities both in
Going forward, on the strength of this record and boosted by this latest contract, MHIEC will pursue additional refurbishment projects to enhance the energy efficiency and stable operation of existing waste treatment plants. It will also proactively propose solutions for lowering maintenance expenses and other lifecycle costs, in a robust quest to attract new orders.
(1) A stoker furnace is the main type of WtE plant. Waste is combusted as it moves along on a fire grate made of heat-resistant castings.
(2) This program, administered by
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