کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6588291 | 1423229 | 2018 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
In-situ atomization and flame characteristics of coal water slurry in an impinging entrained-flow gasifier
ترجمه فارسی عنوان
در اتمسفر و ویژگی های شعله ای از دوغاب آب زغال سنگ در یک گازگرایان جریان جابجایی مضر
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کلمات کلیدی
جابجایی تصفیه شده، دوغاب آب زغال سنگ، اتمسفر، مشخصات شعله بهره وری، ثبات،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
Based on the bench-scale impinging entrained-flow gasifier with coal water slurry (CWS) as the feedstock and the development of advanced visualization techniques, the in-situ atomization and flame characteristics of CWS were investigated. A new imaging system was applied to capture the images around the burners in the operating condition. After image post-processing, the instantaneous flame, time-averaged flame and oscillation of the flame were discussed. With the statistical method, the droplet size distribution, oscillation of the droplet concentration and time-dependent droplet size were obtained to analyze the efficiency and stability of the atomization process. The instantaneous flame shows that the atomization and gasification process is turbulent. The time-average CWS flame shows that the atomization angle decreases with an increase in the ratio of elemental oxygen to elemental carbon (O/C ratio). The oscillation of the flame and the atomization process demonstrate that in-situ atomization is closely related to the CWS flame. The diameter and number of droplets after primary atomization decrease with the increase of the O/C ratio. The decreases in median diameter and unconsumed CWS rate demonstrate that the increase in O/C ratio improves the efficiency of the atomization process. The reduction in oscillation scopes of the droplet concentration and size demonstrates that the increase in O/C ratio improves the stability of the atomization process. In addition, the droplet concentration c in three different O/C conditions is 17.8â¯kg·mâ3, 5.9â¯kg·mâ3 and 1.6â¯kg·mâ3 which demonstrates that the CWS is the dilute phase in the OMB gasifier.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Science - Volume 190, 23 November 2018, Pages 248-259
Journal: Chemical Engineering Science - Volume 190, 23 November 2018, Pages 248-259
نویسندگان
Zhicun Xue, Qinghua Guo, Yan Gong, Yifei Wang, Guangsuo Yu,