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Release: September 1, 1997

NGK WILL LAUNCH FIELD TESTS FOR NEW MUNICIPAL SOLID WASTE DISPOSAL SYSTEM

NGK Insulators, Ltd. (President: Masaharu Shibata, Head Office: Nagoya) signed an agreement with the South Ena District Sanitary Affairs Association in Gifu prefecture (Representative: Kanzo Abe) on August 19, 1997, to construct NGK's new municipal solid waste disposal system, introducing fluidized bed pyrolysis melting process, and jointly conduct field tests for this system. The fluidized bed pyrolysis melting process is highly expected to be a next generation's process for municipal solid waste disposal.

The fluidized bed pyrolysis melting process consists of a fluidized bed pyrolysis furnace and a cyclone smelting furnace. Municipal solid waste, which is pyrolyzed at the temperature from 500°C to 600°C in the fluidized bed pyrolysis furnace, is combusted and molten at the high temperature from 1,300°C to 1,400°C in the cyclone smelting furnace to be molten slag.

Compared with other waste disposal system, NGK's new system has the following advantages;

  1. Combustion of municipal solid waste at high temperature from 1,300°C to 1,400°C reduces the generation of harmful matters, such as dioxine.
  2. Since municipal solid waste is combusted after it is pyrolyzed, the emission of exhaust gas is reduced.
  3. NGK's new system requires smaller space because the devices constituting the system are fewer than other systems.

NGK's new system, with the capacity of 25 tons per day, is supposed to be constructed in Akechi-cho, Ena-district, Gifu prefecture. The construction is scheduled to start around April 1998. Between April 1999 and March 2000, the field tests for this system will be conducted; at the same time, the applications of the molten slug to architectural materials and ceramic materials will be investigated.

NGK is pursuing the net sales of 10 billion yen in 2001 from household waste disposal business based on its fluidized bed pyrolysis and melting technology.


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