The coal with low moisture during carbonization could not only increase the yield of coke,but also promote the coke quality and reduce the energy consumption.In this paper,the influence of the moisture in the blend co...The coal with low moisture during carbonization could not only increase the yield of coke,but also promote the coke quality and reduce the energy consumption.In this paper,the influence of the moisture in the blend coal(1.8%10.13%)on the product yields and coke quality during coal carbonization were investigated.The results show that the coke yield is increased from 75.90%to 77.16%,and the coke qualities such as coke strength after reaction with CO2(CSR),coke reactivity index(CRI),fragmentation index(M25)and abrasion index(M10))are also improved when the moisture of the blend coal decreases from 10.13%to 1.80%in a bench scale reactor.Due to the secondary reaction,tar become lighter when the moisture is decreased.In order to further prove the above results,the blend coal with 1.8%and 9%10%(common moisture used in coke plant)moisture is carbonized in a coke oven with 6 m height,the results show that CRI are 23.4%and 27.3%,CRS are 67.1%and 62.2%under 1.8%and 9%10%moisture of blend coal.Moreover,the variation of the moisture in blend coal has a limited influence on dust emission at the ascension pipe and the charging car.展开更多
对国内大型电站煤粉锅炉燃用的154个煤质的工业分析成分数据进行数学分析试验，根据煤质各成分对稳燃和易燃特性影响的物理关系及煤粉气流稳定着火条件等因素，提出新的煤质稳燃指数（ WR ）和易燃指数（ YR ）。主要特点是：在稳燃指...对国内大型电站煤粉锅炉燃用的154个煤质的工业分析成分数据进行数学分析试验，根据煤质各成分对稳燃和易燃特性影响的物理关系及煤粉气流稳定着火条件等因素，提出新的煤质稳燃指数（ WR ）和易燃指数（ YR ）。主要特点是：在稳燃指数中引入煤粉达到着火温度时水分吸热量QM 与焦炭吸热量QJ 和挥发分发热量QV ；在易燃指数中引入固定碳与挥发分之比FCar/Var ，灰分与水分之和与挥发分之比（）/ar ar arA ＋M V ；与传统方法相结合，拟合出YR与Vdaf 的分布函数关系式；给出图像分辨新方法与界限值。结果表明，在模型条件下，（）/M J VQ ＋Q Q ≈55.8%～93.2%，此值越小，稳燃能力越强。新指数与传统方法相结合，能更清晰地分辨不同种类煤质的稳燃和易燃特性。展开更多
基金Project(51706160)supported by the National Natural Science Foundation of ChinaProject(T201906)supported by the Foundation for Outstanding Youth Innovative Research Groups of Higher Education Institution in Hubei Province,China
文摘The coal with low moisture during carbonization could not only increase the yield of coke,but also promote the coke quality and reduce the energy consumption.In this paper,the influence of the moisture in the blend coal(1.8%10.13%)on the product yields and coke quality during coal carbonization were investigated.The results show that the coke yield is increased from 75.90%to 77.16%,and the coke qualities such as coke strength after reaction with CO2(CSR),coke reactivity index(CRI),fragmentation index(M25)and abrasion index(M10))are also improved when the moisture of the blend coal decreases from 10.13%to 1.80%in a bench scale reactor.Due to the secondary reaction,tar become lighter when the moisture is decreased.In order to further prove the above results,the blend coal with 1.8%and 9%10%(common moisture used in coke plant)moisture is carbonized in a coke oven with 6 m height,the results show that CRI are 23.4%and 27.3%,CRS are 67.1%and 62.2%under 1.8%and 9%10%moisture of blend coal.Moreover,the variation of the moisture in blend coal has a limited influence on dust emission at the ascension pipe and the charging car.
文摘对国内大型电站煤粉锅炉燃用的154个煤质的工业分析成分数据进行数学分析试验，根据煤质各成分对稳燃和易燃特性影响的物理关系及煤粉气流稳定着火条件等因素，提出新的煤质稳燃指数（ WR ）和易燃指数（ YR ）。主要特点是：在稳燃指数中引入煤粉达到着火温度时水分吸热量QM 与焦炭吸热量QJ 和挥发分发热量QV ；在易燃指数中引入固定碳与挥发分之比FCar/Var ，灰分与水分之和与挥发分之比（）/ar ar arA ＋M V ；与传统方法相结合，拟合出YR与Vdaf 的分布函数关系式；给出图像分辨新方法与界限值。结果表明，在模型条件下，（）/M J VQ ＋Q Q ≈55.8%～93.2%，此值越小，稳燃能力越强。新指数与传统方法相结合，能更清晰地分辨不同种类煤质的稳燃和易燃特性。
