硫膏生产工艺真空过滤机装置运行优化研究

ON OPERATION OPTIMIZATION OF VACUUM FILTER UNIT IN SULFUR PASTE PRODUCTION PROCESS

真空过滤机是将天然气脱硫系统中的硫磺浆进行固液分离的设备。硫磺浆分离之后得到硫膏和滤液。在现场使用过程中出现了如下问题:1)在生产硫膏时,产出的硫膏含水率较高,可能造成污染;2)真空过滤机运行过程中出现异常振动。针对上述问题,从真空过滤机运行参数、设备性能以及设备异常振动等方面进行优化,具体为:1)控制硫膏生产时的进料速度、驱动轮转速等运行参数;2)控制设备结构参数,包括对滤液支管弯头进行限流,将通径65 mm缩小为25 mm,以及将孔径为30μm的滤布更换为12μm;3)依据现场工况调整阀门开度,同时定期维护保养,消除真空过滤机异常振动问题。通过采取上述控制优化措施,真空过滤机产出的硫膏含水率由高于35%降至低于25%,设备振动值由高于10 mm/s降至低于7.1 mm/s,硫膏含水高、振动大的问题均得到解决。

The vacuum filter is the equipment for solid-liquid separation of sulfur slurry in natural gas desulfurization system.After separation,sulfur paste and filtrate are obtained.The following defects have occurred in the process of on-site use:1)during the production of sulfur paste,the water content ratio of the sulfur paste is high,which may cause pollution;2)abnormal equipment vibration occurs during the operation of the vacuum filter.Aiming at the above problems,the optimization is carried out from such aspects as vacuum filter operating parameters,equipment performance and abnormal vibration of the equipment.The specific optimization involves:1)controlling the feeding speed,driving wheel speed and other operating parameters during sulfur paste production;2)controlling the structural parameters of the equipment,including limiting the flow of filtrate branch pipe elbow and reducing the diameter from 65mm to 25mm and replacing the filter cloth of pore diameter 30μm with that of 12μm;3)adjusting the valve opening according to the on-site working conditions,and conducting regular maintenance to eliminate the abnormal vibration of the vacuum filter.Through taking the above control optimization measures,the rate of water content of sulfur paste produced by vacuum filter is reduced from more than 35%to less than 25%,and the equipment vibration value is reduced from more than 10 mm/s to less than 7.1mm/s.The problems of high water content ratio and large vibration of sulfur paste are solved.