Short residence time of the sorbent in the gas stream and formation of a dense layer of reaction product surrounding its surface influence the sulfur removal efficiency. A practical means of improving the process perf...Short residence time of the sorbent in the gas stream and formation of a dense layer of reaction product surrounding its surface influence the sulfur removal efficiency. A practical means of improving the process performance is to employ fluidized bed reaction in replacement of entrained bed reaction on normally used in cool side desulfurizaiton. This paper describes cold modeling study of a circulating fluidized bed reactor. Several aspects of the problem are discussed: fluidization behavior of CaO, attrition of the sorbent and solids entrainment from the fluidized bed. Mechanisms and key controlling parameters are identified, and an integral model based on rate of attrition and mass balance is developed for predicting steady state mass flows and particle size distributions of the system. A process flow scheme is finally presented for conducting desulfurization tests in the second stage of the study.展开更多
冷床区范围较大、结构紧凑、安装金属探测仪困难且成本较高,常用的自动化二级跟踪策略无法有效地完成对该场景下钢板的跟踪。通过利用改进的SOLO实例分割算法构建冷床区钢板检测的视觉模型,识别得到冷床区各个钢板对象的坐标位置和长宽...冷床区范围较大、结构紧凑、安装金属探测仪困难且成本较高,常用的自动化二级跟踪策略无法有效地完成对该场景下钢板的跟踪。通过利用改进的SOLO实例分割算法构建冷床区钢板检测的视觉模型,识别得到冷床区各个钢板对象的坐标位置和长宽尺寸;再结合逻辑跟踪模型形成多模型匹配跟踪策略,能够识别到行车下料、冷床卡钢等特殊情况,实现自动下料跟踪和异常预警。结果表明,改进的SOLO实例分割方法在6种不同的环境场景下平均mAP(mean average precision)提升到98.14%,平均mIoU(mean intersection over union)提升到98.72%,并且实现了29.1 fps的处理速率,满足了生产条件中对于准确率和实时性的要求。展开更多
文摘Short residence time of the sorbent in the gas stream and formation of a dense layer of reaction product surrounding its surface influence the sulfur removal efficiency. A practical means of improving the process performance is to employ fluidized bed reaction in replacement of entrained bed reaction on normally used in cool side desulfurizaiton. This paper describes cold modeling study of a circulating fluidized bed reactor. Several aspects of the problem are discussed: fluidization behavior of CaO, attrition of the sorbent and solids entrainment from the fluidized bed. Mechanisms and key controlling parameters are identified, and an integral model based on rate of attrition and mass balance is developed for predicting steady state mass flows and particle size distributions of the system. A process flow scheme is finally presented for conducting desulfurization tests in the second stage of the study.
文摘冷床区范围较大、结构紧凑、安装金属探测仪困难且成本较高,常用的自动化二级跟踪策略无法有效地完成对该场景下钢板的跟踪。通过利用改进的SOLO实例分割算法构建冷床区钢板检测的视觉模型,识别得到冷床区各个钢板对象的坐标位置和长宽尺寸;再结合逻辑跟踪模型形成多模型匹配跟踪策略,能够识别到行车下料、冷床卡钢等特殊情况,实现自动下料跟踪和异常预警。结果表明,改进的SOLO实例分割方法在6种不同的环境场景下平均mAP(mean average precision)提升到98.14%,平均mIoU(mean intersection over union)提升到98.72%,并且实现了29.1 fps的处理速率,满足了生产条件中对于准确率和实时性的要求。
