浮阀-筛孔复合塔板在扩能改造中的应用  

Application of valve-sieve combination tray in expansion revamping project

作　　者：杜翔[1,2] 董月胜[3] 吴少敏[2] 

机构地区：[1]中石化洛阳工程有限公司,河南省洛阳市471003 [2]化学工程联合国家重点实验室天津大学,天津市300072 [3]安庆实华工程设计有限责任公司,安徽省安庆市246002

出　　处：《炼油技术与工程》2013年第3期1-5,共5页Petroleum Refinery Engineering

摘　　要：通过改造实例,说明复合塔板的设计方法和操作性能。结果表明,复合塔板可以增加开孔率,降低塔板压力降。对于降液管液泛控制的塔板,采用复合塔板可以有效消除瓶颈,提高气相负荷上限,是提高塔板处理能力的有效方法。将浮阀塔板改为复合塔板后,开孔率由7.45%增至8.89%;浮阀功能因子由15.47降至11.35;塔板压力降由856.8 Pa降至561.4 Pa;降液管液层高度由270.6 mm降至211.2 mm,小于292.5 mm的安全高度。复合塔板与浮阀塔板分离效率接近,操作弹性计算值略低,但实际操作区域较大。另外,用复合塔板技术改造浮阀塔板,具有投资低、实施便捷、工期短等特点。Detailed design procedures and operation performances of valve ＆ sieve combination tray are described in a case study. Results indicate that, as compared with common valve trays, the combination trays allow higher perforation area and thus lower pressure drop. For downflow flooding control cases, the combination trays can effectively debottleneck and increase maximum allowable vapour load so that tray column capacity will be accordingly increased. After replacing the valve plates with combination plates, the porosity is increased to 8.89% from 7.45% , the function factor of float valve is decreased to 11.35 from 15.47, the pressure drop of tower plate is lowered to 561.4 Pa from 856.8 Pa, and the liquid height of downcomer is reduced to 211.2 mm from 270.66 mm, which is lower than the safety height of 292.55 mm. The combination tray has similar se paration efficiency to that of valve tray, slightly lower turn-down ratio and greater operation range. lly, the revamping of valve tray to combination has advantages of lower investment, easier installation and shorter installation period.

关 键 词：浮阀-筛孔复合塔板 浮阀 筛孔 塔板操作性能 塔板处理能力 设计方法 

分 类 号：TQ053.5[化学工程]