化工学报
化工學報
화공학보
CIESC Jorunal
2015年
10期
4170-4176
,共7页
煤燃烧%燃料%热力着火%着火温度%着火热%模型
煤燃燒%燃料%熱力著火%著火溫度%著火熱%模型
매연소%연료%열력착화%착화온도%착화열%모형
coal combustion%fuel%thermal ignition%ignition temperature%ignition heat%model
为了寻求动力煤成分分布与煤质着火及稳燃特性之间的函数关系，根据燃烧学的热力着火理论，对国内大型电站煤粉锅炉燃用的166个典型的煤质分析数据进行了数学分析。分析了固态碳（ Cgt ）和当量气态碳（Cqt+3.67Har）比值随 Vdaf的分布规律及其对煤质着火的影响；根据文献中77个煤质的一维沉降炉实验数据，拟合出煤粉的着火温度与Vad及Aad的函数关系，计算分析了本文大数据样本煤质的着火温度及着火热的分布规律，提出将着火热和着火温度作为煤质着火特性的图像分辨新方法。据此分析了各类煤质的着火与稳燃特性。结果表明，本方法能明确地定量区分不同类煤质和同类煤质的着火特性差异，且在理论上给出符合宏观规律的合理解释。
為瞭尋求動力煤成分分佈與煤質著火及穩燃特性之間的函數關繫，根據燃燒學的熱力著火理論，對國內大型電站煤粉鍋爐燃用的166箇典型的煤質分析數據進行瞭數學分析。分析瞭固態碳（ Cgt ）和噹量氣態碳（Cqt+3.67Har）比值隨 Vdaf的分佈規律及其對煤質著火的影響；根據文獻中77箇煤質的一維沉降爐實驗數據，擬閤齣煤粉的著火溫度與Vad及Aad的函數關繫，計算分析瞭本文大數據樣本煤質的著火溫度及著火熱的分佈規律，提齣將著火熱和著火溫度作為煤質著火特性的圖像分辨新方法。據此分析瞭各類煤質的著火與穩燃特性。結果錶明，本方法能明確地定量區分不同類煤質和同類煤質的著火特性差異，且在理論上給齣符閤宏觀規律的閤理解釋。
위료심구동력매성분분포여매질착화급은연특성지간적함수관계，근거연소학적열력착화이론，대국내대형전참매분과로연용적166개전형적매질분석수거진행료수학분석。분석료고태탄（ Cgt ）화당량기태탄（Cqt+3.67Har）비치수 Vdaf적분포규률급기대매질착화적영향；근거문헌중77개매질적일유침강로실험수거，의합출매분적착화온도여Vad급Aad적함수관계，계산분석료본문대수거양본매질적착화온도급착화열적분포규률，제출장착화열화착화온도작위매질착화특성적도상분변신방법。거차분석료각류매질적착화여은연특성。결과표명，본방법능명학지정량구분불동류매질화동류매질적착화특성차이，차재이론상급출부합굉관규률적합리해석。
In order to identify the function between the distribution pattern of steam coal content and ignition and stable combustion characteristics, a mathematical analyzing data test is made to 166 coal qualities used by pulverized-coal fired boiler of large power station in China. This research analyzed the distribution pattern ofVdaf ratio between fixed carbon (Cgt) and equivalent gaseous carbon (Cqt+3.67Har), and its influence on the ignition and combustion characteristics. With the experimental data from one dimension sedimentation furnace of 77 coals collected from the literatures, the function of ignition temperature toVad andAadwas simulated, and the distribution characteristics of ignition temperature and heat of different coal samples were calculated and analyzed. A new method for resolving images of ignition temperature and heat was introduced, which has been applied to analyze the characteristics of coal firing. The results showed that it can not only quantitatively distinguish the ignition characteristics among the same and different type of coals, but also give reasonable explanation of macroscopic law in theory.
