含水物質の燃焼特性

フォーマット:

論文

責任表示:

斉藤, 正浩 ; 天谷, 賢児 ; 萩原, 五郎 ; 新井, 雅隆

言語:

日本語

出版情報:

日本機械学会, 2001-06-25

著者名:

• 斉藤, 正浩
• 天谷, 賢児
• 萩原, 五郎
• 新井, 雅隆

掲載情報:

日本機械学會論文集. B編

ISSN:

0387-5016    

巻:

67

通号:

658

開始ページ:

1536

終了ページ:

1543

バージョン:

VoR

概要:

application/pdf<br />Journal Article<br />To clarify the effect of water content on combustion characteristics of watery materials, combustion test of a high water-permeable balsa wood was performed using a thermogravimetric fur … nace. The furnace temperature is between 650℃ and 1000℃, and water contents in the small balsa pieces (0.3g) were varied up 70 wt%. Mass reduction during pre-heating, volatile matter combustion and char combustion were measured with a microbalance. Also, the variations of flame temperature and center temperature of the test piece during combustion process were measured. On the combustion of high water-contained balsa, it was found that ignition started before the water was evaporated completely. It means that two proceses, devolatilization of volatiles and vaporization of remaining water, are proceeding simultaneously during the volatile matter combustion. Ignition delay and retention time of volatile matter combustion increased with increasing the water content. The increases of flame temperature and center temperature of the test piece were prevented by the latent heat of water vaporization. The combustion rate of volatile matter was drastically reduced in proportion to the water content. Also, it was confirmed that a part of char burned during the latter stage of volatile matter combustion. The effect of water content on char combustion rate was small. From this study, it was concluded that the water content over 50 wt% affected remarkably to the volatile matter combustion. 続きを見る