TS-71 A Development of Low NO_x Combustion in Medium-Btu Fueled 1300℃-Class Gas Turbine Combustor in IGCC(Session C-7 NO_x Reduction 2)

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概要

• 論文の詳細を見る

• The development of integrated coal gasification combined cycle (IGCC) systems ensures cost-effective and environmentally sound options for supplying future coal utilizing power generation needs. The Japanese government and electric power industries in Japan promoted research and development of an IGCC system using an air-blown entrained-flow coal gasifier. On the other hand, Europe and the United States are developing the oxygen-blown IGCC demonstration plants. Gasified coal fuel produced in an oxygen-blown entrained-flow gasifier, has a calorific value of 8.8MJ/m^3 which is one fifth that of natural gas. However, the adiabatic flame temperature of oxygen-blown medium-Btu gasified coal fuel is higher than that of natural gas and so NO_x production from nitrogen fixation is expected to increase significantly. In the oxygen-blown IGCC system, a surplus nitrogen in quantity is produced in the oxygen-production unit. When nitrogen premixed with gasified coal fuel is injected into the combustor, the power to compress nitrogen increases. A low NO_x combustion technology which is capable of decreasing the power to compress nitrogen is a significant advance in gas turbine development with an oxygen-blown IGCC system. In this paper, the effect of nitrogen injected directly into the combustor on the thermal efficiency of the plant is discussed. Analyses confirmed that the thermal efficiency of the plant improved by 0.3 percent (absolute), compared with a case where nitrogen is premixed with gasified coal fuel before injection into the combustor. A medium-Btu fueled 1573K (1300℃)-class gas turbine combustor with a swirling nitrogen injection function designed with a low NO_x combustion technology, and a half-scale combustor designed based on almost the same specifications as the full-scale one were constructed, and the performance of these combustors were evaluated under atmospheric and high pressure conditions respectively.

• 社団法人日本ガスタービン学会の論文
• 1999-11-14

著者

• Sato Mikio

  Central research Laboratories, Idemitsu Kosan Co., Ltd.

• Sato Mikio

  Central Research Institute Of Electric Power Industry

• Iwai Yasunori

  Toshiba Corporation

• HASEGAWA Takeharu

  Central Research Institute of Electric Power Industry

• HISAMATSU Tohru

  Central Research Institute of Electric Power Industry

• KATSUKI Yasunari

  Central Research Institute of Electric Power Industry

• ONODA Akihiro

  Toshiba Corporation

• UTSUNOMIYA Masaharu

  Toshiba Corporation

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• A Study on Multi-Injection Methods of Over-Fire Air in Pulverized Coal Combustion
• TS-71 A Development of Low NO_x Combustion in Medium-Btu Fueled 1300℃-Class Gas Turbine Combustor in IGCC(Session C-7 NO_x Reduction 2)
• YOKOSUKA RESEARCH LABORATORY IN CENTRAL RESEARCH INSTITUTE OF ELECTRIC POWER INDUSTRY(Letters from R&D Groups)
• Degradation of Silicon Carbide in Combustion Gas Flow at High Temperature and High Speed
• Effect of Primary Equivalence Ratio on Reducing both Fuel-NOx and Thermal-NOx Emissions of Gas Turbine Combustor for Oxygen-blown IGCC with Hot/Dry Syngas Cleanup

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