報告書番号

W89017

タイトル（和文）

石炭ガス化用ガスタービン燃焼器の開発－第５報保炎強化型燃焼器の基本特性－

タイトル（英文）

DEVELOPMENT OF GAS -TURBINE COMBUSTOR USING COAL- DERIVED GASEOUS FUEL -PART 5; EVALUATION OF RICH- LEAN COMBUSTOR WITH PILOT FLUME

概要 （図表や脚注は「報告書全文」に掲載しております）

副室による一次燃焼域の火炎安定性を図った１３００℃級保炎強化型燃焼器の燃焼試験を行い，以下の知見を得た。（１）燃焼器に副室を設けた結果，全負荷帯において，一次燃焼域の火炎安定性が飛躍的に向上した。（２）二次燃焼空気孔を移動させることにより，燃焼器出口ガス濃度を１３００℃とする定格条件において，ＮＯｘ転換率を７０％から５０％へ低減することができた。（３）燃焼効率は定格条件で，約９９．６％であり，中間負荷時では，９９．９％以上であった。（４）燃焼器壁面のすべての領域において，ライナメタル温度は８００℃以下であった。

概要 （英文）

THIS PAPER DESCRIBES LOW-FUEL NOX COMBUSTIONTECHNOLOGY FOR A 1300 DEGREE -CLASS GAS-TURBINE COMBUSTOR USING LOW-BTU GASEOUS COAL FUEL. IN RICH-LEAN COMBUSTION METHODS,THE RICHER THE PRIMARY ZONE IS THE MORE THE FUEL NOX DECREASE. HOWEVER FLAME HOLDING BECOMES VERY DIFFICULT IN THE EXTRA-RICH PRIMARY ZONE. FOR THIS REASON,THISCOMBUSTOR IS EQUIPPED WITH A FLAME-HOLDER DEVICE. A STUDY WAS PERFORMED TO DETERMINE THE COMBUSTION AND EMISSION CHARACTERISTICS OF A 1300DEGREE-CLASS RICH-LEAN COMBUSTOR WITH PILOT FLAME. THE RESULTS ARE AS FOLLOWS: (1)THE PLAME STABILITY OF THE PRIMARY CONBUSTION ZONE IMPROVED IN ALL LOAD CONDITIONS. (2)AS THE SECONDARY INJECTION PORTS FOR COMBUSTIONAIR ARE MOVED DOWNSTREAM,IT IS POSSIBLE TO DECREASE THE CONVERSION OF AMMONIA TO NOX FROM 70% TO 50% UNDER FULL POAD CONDITIONS AT WHICH THE ONTLET TEMPERATURE IS 1300DEGREE. (3)THE COMBUSTION EFFICIENCY WAS ABOUT 99.6% UNDER FULL LOAD AND AS MORE THAN 99.9% UNDER LOW LOAD CONDITIONS. (4)THE METAL LINER TEMPERATURE WAS LESS THAN 800 DEGREE AT ALL LOCATIONS UNDER ALL LOAD CONDITIONS.

報告者

キーワード