反洗系统投用对芳烃联合装置的影响

某石化公司芳烃联合装置采用吸附分离工艺生产对二甲苯(PX)。自2014年吸附塔换剂投用至2020年期间,在带来巨大经济效益的同时,伴随着吸附剂寿命老化,性能下降等问题,导致PX纯度持续恶化,PX收率持续降低。为改善PX纯度,提高PX收率,经公司研究决定,投用吸附塔反洗系统。自反洗系统投用后PX纯度由99.72%上升至99.78%,PX收率由93.5%上升至97.6%,经核算反洗系统投用后年增效约4399万元。

洗井车反洗系统改进设计

江汉石油钻头股份有限公司为了使新开发的JHX5255TJC型洗井车彻底解决目前洗井车滤料不能清洗干净,水质难以达到注水井洗井要求以及工人劳动强度大等问题,对该型洗井车反洗系统进行了改进设计,主要包括流程优化、结构优化设计,将搅拌机构由电机驱动改为液压驱动等。现场应用结果表明,改进后的洗井车反洗系统完全适应国内各油田洗井车滤料快速反洗要求,提高反洗效率,增强洗井车在现场的适应性。

反洗系统的投用对PX装置的影响

为减缓吸附塔14格栅床层压差的增长趋势以及配合反冲洗后13格栅至15格栅大旁路的应用,投用了反洗系统,以保证PX产品的纯度和收率。文章主要讨论反洗系统投用前后对PX装置的产品纯度和收率的影响。结果表明,反洗系统的投用虽然牺牲了一定的能耗和设备损耗,但在一定程度上提高了PX产品纯度及收率,带来了良好的经济效益。

PLC控制系统在循环水反洗系统中的应用

介绍PLC控制系统工作原理及其在唐钢反洗系统中的具体应用。

PLC在水处理工程中过滤上的应用

在冶炼水处理过程控制中，重点在过滤器反洗控制系统，应用可编程控制器，实现反洗泵、反洗电机及众多阀门的联锁控制，保证了安全运行并提高污水处理效果和降低成本。

Laser Cleaning of Mirror Surface for Optical Diagnostic Systems of the International Thermonuclear Experimental Reactor

The development of cleaning optics and deposition-mitigating techniques is a key factor in the construction and operation of optical diagnostics in ITER. The cleaning of optical surface by pulsed radiation from a fiber laser is an effective method that can recover optical properties of the mirror surface. The possibility of cleaning metallic mirrors from films with complex composition by pulsed radiation from a fiber laser has been experimentally researched. It has been shown that the high initial reflection characteristics of optical elements can be recovered by choosing regimes of radiation effect on the deposited surface. Efficient cleaning is ensured by radiation with the power density of less than 107 W/cm2. At this relatively low power density, pollutions are removed in a solid phase and the thermal effect on the mirror is insignificant. Preliminary experiments of the metal mirrors cleaning by fiber laser radiation have demonstrated the possibility of hardware implementation techniques.