《扬子PTA技术服务报告》.doc

Memo of field meeting regarding to phenomena of water hammer and vibration arise at condensate inlet of deaerator for Yangzi PTA project 关于扬子石化PTA除氧器振动以及水击情况的现场会议记录 Date日期： 2006-10-10 Attendee参加人： 中国石化工程建设公司： 济南市压力容器厂： Stork Thermeq B.V. /Beijing Hofung Technology: Description of issue: 问题描述： Stork sprayer type deaerator is applied at Yangzi PTA, which outlet capacity is 320t/h, effective/total volume is 112/1 cubic meter, sprayer model is DN250. During the commissioning of deaerator, the phenomena of water hammer and vibration arise. The purpose of meeting is to find the reason causing water hammer and vibration and give the solution. 扬子PTA除氧器采用STORK无头除氧器技术，除氧器出力为320T/H，有效/总容积为 ，喷嘴型号为DN250。 在除氧器开车试运中，凝结水进口管段靠近除氧器段产生振动，以及水击现象。 此次现场会议，就是要找出振动以及水击现象产生的原因，并且确定解决方案。 Design and operation parameter: 设计参数以及实际运行参数： Water level: LWL1550 NWL1700 (现场值 1200-1310=-110mm ) HWL1800 Guaranteed Oxygen content at outlet: 5~7 ppb ( NA ) Operating pressure: 0.2 MPa (现场值 0.13MPaG ) Operating Temperature: 133.5 Degr.C (现场值124Degr.C ) 水位： 低水位- 正常水位00 (1200-1310=-110mm) 高水位0 出口含氧量 5~7 ppb 操作压力：0.2 MPa ) 操作温度：133.5 Degr.C 124Degr.C ) Parameter of stream injected into condensate inlet:汇入凝结水管线工质参数： Item Pressure /Reading (MPaG) Temperature /Reading (Degr.C) Flow /Reading (T/h) Remarks Deaerator Feed water NA NA Outlet of Filter 过滤器出口 0.3 41.5 NA LP condensate 2 凝结水2 0.7 134.6 NA A1 DEMI water 除盐水 0.5 41.5 NA Deaerator 除氧器 0.13 124 现场示意图： A1: temperature of condensate 2 calculation as: P of flash container (p of flash steam head pipe) is 0.21MPaG Then: Ps=0.21+0.1=0.31MPa So: Ts = 134.6 Degr.C A1: 凝结水2的温度计算如下: 扩容器罐的压力（与扩容器闪蒸蒸汽连接的蒸汽母的压力）为 0.21MPa（表压） 那么: 饱和压力为Ps=0.21+0.1=0.31MPa（绝压） 饱和水温度 Ts = 134.6 Degr.C A2: Pressure is equal to p of deaerator plus pressure drop of sprayer The inlet capacity of condensate is approx 170t/h, under this amount of flow, the pressure drop of sprayer is approx. 0.05MPa, P1=0.23+0.05=0.28MPa Accordingly: