最近，エネルギーの有効利用の観点から，石炭だきボイラ燃料として低揮発分炭を使用する要求が増加している．低揮発分炭は，通常のれき青炭に比べ着火，燃焼性に劣り，NO_X，未燃分共に大幅に増加することが予想される．当社は，低NO_Xでかつ低空気比でも安定燃焼可能なCUF（Circular Ultra Firing）方式に加え，操作性，保守性に優れかつ従来型PM（Pollution Minimum）バーナの低NO_X，高燃焼性能を上回るA-PM（Advanced-PM）バーナを開発，実用化した．運転実績では，自家発用微粉炭だきボイラとしては世界最高レベルの低NO_X，高効率燃焼を達成し，現在順調に稼働中である．

There is a growing demand for the use of non-bituminous coal in coal fired boilers in order to achieve effective energy utilization. However it is more difficult to ignite and maintain the combustion of non-bituminous, in comparison with bituminous, coal. An advanced type PM burner (Advanced-Pollution Minimum burner). which was developed from original PM technology burner. was applied this new low NO_X CUF boiler. The A-PM burner has a simple construction which provides good operability and maintainability. The A-PM burner combined with CUF (Circular Ultra Firing) and MACT (Mitsubishi Advanced Combustion Technology) systems, have high combustion efficiency and low NO_X emission characteristics. This boiler achieves the lowest NO_X emissions and the highest thermal efficiency of any industrial pulverized coal-fired boiler, and has been operating successfully since it started commercial operation in November 1996.