|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Experimental and Numerical Study on Co-combustion Behaviors and NO_(x) Emission Characteristics of Semi-coke and Coal in a Tangentially Fired Utility Boiler显示文摘The utilization of powdery semi-coke as a power fuel in pulverized coal-fired power plants has become a new and potential technique to consume the excess powdery semi-coke.The characteristic of low volatile results in poor combustion performance and high NO_(x) emission,and to co-fire with bituminous coal is a practical strategy to address this problem.However,the co-combustion characteristics and the inherent interaction between semi-coke and coal remain insufficiently understood.In addition,the influences of secondary air arrangement,the boiler operation load,and the fuel type on co-combustion process are still unclear,which is urgent to be further explored.In the present study,experiments and numerical simulations were jointly utilized to inquire into the co-combustion behaviors and NO_(x) emission features of semi-coke and coal.The results demonstrated that the'out-furnace method'was a suitable choice for small-capacity boiler when the proportion of semi-coke was 33%,due to the limited combinations of the semi-coke injection position.It was recommended that semi-coke was preferred to be injected from the middle layers of the furnace under the'in-furnace method'to improve the overall co-combustion performance.The critical value of the separated over fire air ratio in this study was 27.5%,over which a slight drop of carbon content in fly ash could come about.Moreover,the elevation in the proportion of separated over fire air gave rise to the significant decline of NO_(x) concentration.The constricted secondary air arrangement was preferred to be employed due to the high boiler efficiency.The separated over fire air and the surrounding air needed to maintain a wide-open degree to prevent the increase of NO_(x) emissions and the coking of nozzles.For the load reduction regulation method adopted in this study,the NO_(x) concentration first rose and then dropped,while the burnout ratio decreased obviously as the operation load was reduced.Different combinations of coal and semi-coke generated significant influences on co-combustion behaviors within the furnace.The NO_(x )generated by high-volatile fuel (bituminous coal) combustion was mainly affected by volatile-N,while the NO_(x )generated by low-volatile fuel (semi-coke) was mainly impacted by char-N.This study is of guiding significance for the efficient and clean utilization and beneficial to the large-scale application of powder semi-coke in power plants. | WANG Chang’an FENG Qinqin JIN Liyan WANG Zhichao YAO Wei WANGPengqian DU Yongbo ZHANG Xilai YANG Zhongcan CHE Defu | 2021 | Journal of Thermal Science2021，30，4： | 2 |
| 2 | Investigation on the NO reduction with coal char and high concentration CO during oxy-fuel combustion 显示文摘 | Wang Chang'an Du Yongbo Che Defu | 2012 | Energy & Fuels2012，26，12： | 1 |
| 3 | Release and transformation of sodium during combustion of Zhundong coals显示文摘 | GUANGYU L CHANG'AN W YU Y XI J YINHE L DEFU C | 2015 | J Energy Inst2015，，： | 1 |
| 4 | Investigation on the NO reduction with coal char and high concentration CO during oxy-fuel combustion显示文摘 | WANG Chang'an DU Yongbo CHE Defu | 2012 | Energy & Fuels2012，26，12： | 1 |
| 5 | Reactivities of Coals and Synthetic Model Coal under Oxy-fuel Condi- tions 显示文摘 | WANG Chang'an DU Yongbo CHE Defu | 2013 | Thermochimiea Acta2013，553，： | 1 |
| 6 | Pyrolysis and combustion characteristics of coals in oxyfuel combustion显示文摘 | Chang’an Wang Xiaoming Zhang Yinhe Liu Defu Che | 2012 | Applied Energy2012，，： | 1 |
| 7 | Chemical modification of chitosan under high-intensity ultrasound and properties of chitosan derivatives显示文摘 | Jiangtao Wang Xiaoxiao Jin Defu Chang | 2009 | Carbohydrate Polymers2009，78，： | 1 |
| 8 | Chemical modification of chitosan under high-intensity uhrasound and properties of chi- tosan derivatives显示文摘 | Jiang-tao Wang Xiao-xiao Jin Defu Chang | 2009 | Carbohydrate Polymers2009，78，1： | 1 |
| 9 | Chemical modification of chitosan under high- intensity ultrasound and properties of chitosan derivatives显示文摘 | JIANG-TAO WANG XIAO-XIAO JIN DEFU CHANG | 2009 | Carbohydrate Polymers2009，78，1： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员