報告書番号

M14002

タイトル（和文）

CO2回収型高効率IGCCシステムにおけるガスタービンの基礎燃焼特性 －第2報 量論比条件における基礎燃焼特性－

タイトル（英文）

Fundamental Combustion Characteristics of Gas Turbine for CO2 Capture IGCC System - 2nd report. Fundamental combustion characteristics under stoichiometric condition -

概要 （図表や脚注は「報告書全文」に掲載しております）

当研究所が提案したCO2回収型高効率IGCCシステムにおけるガスタービン燃焼器は、循環ガス（主にCO2）を出口ガス温度制御のための希釈剤として用い、燃料（主な可燃成分：CO）と酸素の量論比近傍での燃焼が求められている。本報告では、CO2回収型GT用基礎燃焼試験装置を用いた大気圧燃焼試験により、量論比条件における各種希釈剤（基準組成CO2 + H2O（H2O／CO2 = 約0.33）、CO2のみ、N2のみ）や分割供給が燃焼効率に及ぼす影響などを実験的に明らかにする。

概要 （英文）

A gas turbine combustor for CO2 capture IGCC system, that burnt CO-rich coal gasified fuel and oxygen near stoichiometric condition in CO2-rich diluent, was assumed and the combustion tests with a small diffusion burner were performed under atmospheric pressure condition. Combustion characteristics near stoichiometric condition, influences of diluent composition, and diluent supplying method were examined. The main results are shown as follows. (1) Near stoichiometric conditions, the combustion efficiency near the burner was different depending on equivalent ratio, and the combustion efficiency in the downstream was nearly equal to the combustion test results with coal gasified fuel and air when the equivalent ratio was less than one. (2)The combustion efficiency depended on the diluent composition and it was improved in order of N2, CO2 + H2O, CO2. This tendency was corresponding to the analytical result. (3)In the case of supplying a half amount of the diluent to the second dilution holes, combustion efficiency near the burner was improved by the increase of gas temperature and combustion gas residence time.

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