State-of-the-Art Waste Treatment and Recycling Plant Delivered to Kishiwada Kaizuka Clean Center

Apr. 02, 2007

Tokyo, April 2, 2007 – Kawasaki Plant Systems, Ltd. (formerly Kawasaki Environmental Engineering, Ltd.) announced today that it has delivered a state-of-the-art waste treatment and recycling plant to the Kishiwada Kaizuka Clean Center in Osaka Prefecture.  The plant consists of three cutting edge stoker-type incinerators that essentially incorporate the core technologies of the Kawasaki Advanced Stoker, as well as two plasma-type ash melting furnaces and a waste recycling system. In addition to supplying the power to operate plant facilities, waste heat from the plant’s steam turbine power generator is sold to the local electric power corporation. Technological features of this plant include: (1) The Kawasaki Parallel Flow Type Incinerator The furnace shape allows the flame to flow parallel to the direction in which refuse is incinerated, enabling complete combustion with less air (or at a lower air ratio) and reducing more combustibles in the bottom ash compared with conventional incinerators. (2) The Kawasaki Water Cooled Grate The water cooling system for grates which feed refuse at high temperature conditions improves the durability of the incinerator. (3) A flue gas recirculation system After high-temperature exhaust gas is burned at a low oxygen concentration, it is recirculated into the incinerator. This system further enhances low air-ratio combustion and enables stable combustion at high temperatures while reducing thermal NOx emissions (nitrogen oxide formation caused by burning at localized high temperatures).  The plant not only meets strict standards for dioxins, exhaust gas, effluent emissions, fly ash leachate and slag but also employs the abovementioned technologies to reduce environmental load through: (1) a 25% reduction in total flue gas (compared with Kawasaki’s conventional systems); (2) a 20% reduction in NOx emissions during combustion (compared with Kawasaki’s conventional systems); and (3) more compact flue gas treatment facilities as well as a reduction in running cost due to the lower load. This plant is the 159th waste treatment system Kawasaki has delivered. It is a model plant that essentially combines the latest feasible technologies that Kawasaki has developed over the years.