精对苯二甲酸定量包装秤系统改造

MODIFICATION TO PTA QUANTITATIVE PACKING SCALE SYSTEM

针对天津石化化工部精对苯二甲酸(PTA)定量包装秤性能不稳定、产生误差(70%超标)的问题,就提高包装秤实时测量精度,探讨包装秤测控系统的设计方法,着重阐述了系统的设计方案。利用该方案实现了对包装秤进行连续监控,保证定量包装秤安全、准确运行。信号调理设备采用美国国家仪器公司(National instruments)的数据采集与提出提高产品出厂计量准确性的具体措施。精对苯二甲酸定量包装秤系统改造后,测量98000包/t精度达到了0.1%,大大减少了误差,包装速度比以前加快10%,满足了装置生产的需要。

As to the problems of unstable performance and deviations off-spec (70% off-spec) of PTA quantitative packing scale of TPCC Chemical Division, this paper discusses the design method of scale monitoring system for the purpose of better real-time measuring accuracy of the scale with emphasis on system design pattern.With this design we realized continuous monitoring on scale,so that the management level of the system is improved and the safe and accurate operation of the scale is guaranteed.Signal adjustment ...