上榆泉煤矿洗选中心密度自动控制系统研发及应用

Development and application of density automatic control system for washing center in Shangyuquan coal mine

针对上榆泉煤矿洗选中心重介系统密度控制滞后、不及时,人工加介工程量大、精确度低,半自动控制系统精度低、不及时,导致液位、密度不稳定,重介分选机分选效果不稳定、介耗增加、运行成本高的问题,采用移动射流技术的自动冲介装置,代替原有人工机械推介,并增设与原生产系统独立的制介系统,系统空闲状态下完成加介、制介功能。研发液位优先的逻辑控制系统,综合考虑合介桶的液位和密度的不同状态的组合,从动态发展的角度出发预制了加介、分流、补水的控制关系,可保持选后产品的质量稳定及分选系统的正常稳定运行,减少人为调整不及时,在实现降低成本的同时,选后产品的质量更加稳定。分选系统的正常稳定运行,有效控制了生产、煤质事故。

The density control of the dense medium system in the washing center of Shangyuquan coal mine lags behind and is not timely,large amount of artificial media and low accuracy,the precision of semi-automatic control system is low and untimely,which leads to the instability of liquid level and density,the instability of separation effect of heavy medium separator,the increase of medium consumption and the high operation cost.The automatic medium flushing device using mobile jet technology replaces the original artificial machinery,and adds a medium preparation system independent of the original production system,which completes the medium feeding and cleaning in the idle state of the system introduction function,The logic control system of liquid level priority is developed,comprehensively considering the combination of different states of liquid level and density of medium mixing barrel,and the control relationship of adding medium,shunting and replenishing water is prefabricated from the perspective of dynamic development.So as to maintain the stable quality of the selected products,ensure the normal and stable operation of the sorting system,reduce the interference of human untimely factors,reduce the cost,make the quality of the selected products more stable,the normal and stable operation of the sorting system,and effectively control the production and coal quality accidents.