激光全元素煤质在线分析仪在神东选煤厂的应用

Application of coal on-line coal quality laser analyzer in Shendong coal preparation plant

为解决传统化验方法人工干扰大、化验周期长、化验结果滞后等问题,实现神东商品煤煤质的快速检测,通过对目前常用煤质在线检测技术的优劣势对比后,选择安全、无污染的激光全元素煤质在线分析仪并与采样系统相结合的方法实现商品煤的快速检测。利用煤质在线分析分析仪实时检测采样系统二次缩分后弃样的全水、灰分、发热量、挥发分和全硫5个煤质指标。通过与常规检验的结果对比,激光全元素煤质在线分析仪检测值与常规化验方法的偏倚小,但由于混煤水分较大、容易蒸发、煤质较复杂,所以煤质在线分析仪对混煤检测的偏倚比精煤大;分析仪对灰分和发热量的检测与常规检测变化趋势吻合较好。因此采用激光全元素煤质在线分析仪与采样系统结合的方式可满足神东商品煤快速检测的要求。

In order to solve the problems of artificial interference,long test cycle and lagging test results of traditional test methods,to realize the quick inspection of coal quality of Shendong commodity coal,after comparing the advantages and disadvantages of the commonly on-line coal quality inspection technology,a safe and pollution-free laser all-element coal quality online analyzer is selected and combined with the sampling system to realize the rapid detection of commercial coal. Five coal quality indexes,namely,total water,ash content,calorific value,volatile content and total sulfur,were detected in real time by online coal quality analyzer. Compared with the results of conventional inspection,the deviation between the detected value of the laser all-element coal online analyzer and the conventional analytical method is small. However,due to the large water content of mixed coal,easy evaporation and complicated coal quality,the deviation of the mixed coal online analyzer is larger than that of cleaned coal. The measurement of ash content and calorific value by analyzer is in good agreement with the change trend of conventional measurement. The application results show that the combination of laser all-element coal quality on-line analyzer and sampling system can meet the requirement of quick detection of Shendong commercial coal.