CAJ | 학술논문

动力煤的绝热燃烧温度ta是煤粉锅炉热力计算中最重要的参数之一。绝热燃烧温度与炉膛出口烟气温度之差(ta-t'f )决定了炉膛受热面(包括水冷壁和屏式过热器)的吸热量。文中计算了158种中国动力煤的绝热燃烧温度并且讨论了动力煤的特性参数对绝热燃烧温度的影响。计算结果表明：随着低位发热量数值的提高(Qnet,ar=10.84~29.49 MJ/kg))，中国动力煤的绝热燃烧温度从1458℃提高到1959℃，理论绝热燃烧温度 ta0大约比绝热燃烧温度 ta高254~352℃。低位发热量数值对绝热燃烧温度有近似线性的正面影响。对于中国动力煤而言，w(Car)是影响 Qnet,ar的最重要正面参数， w(Mar)是影响Qnet,ar的最重要负面参数。此外，由煤的w(Vdaf)决定的过量空气系数α对ta具有非线性的负面影响。
동력매적절열연소온도ta시매분과로열력계산중최중요적삼수지일。절열연소온도여로당출구연기온도지차(ta-t'f )결정료로당수열면(포괄수랭벽화병식과열기)적흡열량。문중계산료158충중국동력매적절열연소온도병차토론료동력매적특성삼수대절열연소온도적영향。계산결과표명：수착저위발열량수치적제고(Qnet,ar=10.84~29.49 MJ/kg))，중국동력매적절열연소온도종1458℃제고도1959℃，이론절열연소온도 ta0대약비절열연소온도 ta고254~352℃。저위발열량수치대절열연소온도유근사선성적정면영향。대우중국동력매이언，w(Car)시영향 Qnet,ar적최중요정면삼수， w(Mar)시영향Qnet,ar적최중요부면삼수。차외，유매적w(Vdaf)결정적과량공기계수α대ta구유비선성적부면영향。
The adiabatic combustion temperature of steaming coals, denoted as ta, is one of the most important parameters for thermal calculation of pulverized coal fired boilers. The difference of ta and the flue gas temperature at the exit of the furnace (ta-t'f ) determines the heating power of furnace surfaces, such as water walls and platen superheaters. This paper calculates the adiabatic combustion temperatures of 158 kinds of Chinese steaming coals and discusses the impact of coal properties on ta. Calculation results revealed that with the increase of the low heating value (Qnet,ar=10.84~29.49 MJ/kg), the adiabatic combustion temperature of Chinese steaming coals (ta) rises from 1 458℃ to 1 959℃, and the theoretical adiabatic combustion temperature (ta0) is about 254~352℃ higher than ta. The low heating value (Qnet,ar) has an approximately linear positive impact on ta. For Chinese steaming coals, w(Car) is the most important parameter positively affecting Qnet,ar, and w(Mar) is the most important parameter negatively affecting Qnet,ar. Besides, the excessive air coefficient, denoted as α, which is determined by w(Vdaf) of coal, has a nonlinearly negative impact on ta.