触摸屏与PLC在海水淡化控制系统中的应用_刘振全.pdfVIP

PLC , PLC A pp lica tion o f Touch Screen and PLC in the Contro l System o f Seawa te r Desa lina tion (天津科技大学电子信息与自动化学院, 天津 300222) : , , , , , , PLC , : : TP273 : A Abstract: Based on the techniques of reverse osm osis in-de th rocessing in seawater desalination, a system is ex loited and designed. In the system, doublemembranes assembly that can run smi ultaneously or alternatively is included, so the system can continuously su ly water in long-term o eration. Two o erationalmodes in the control system are offered, auto andm anual. T ouch screen is used as the humanm achine in- terface to realize the functions such as arameter adjusting, modifying and dis lay ing, etc. ; every stage of seaw ater desalination can be su er- vised more conveniently andmore easily settled or determ ined, and the abnorm al cond itions of the system can be located quick ly. The rogram- mable logical controller controls the rocess of seaw aterdesalination, and controls the equi ment, e. g. solenoid valves, motors ofw ater um s. The system can be aused or changed to safety condition autom atically when the system is abnorma.l The sy stem features excellent stability, high reliability, and easy maintenance. Key ords: Seawater desalination Double membrane T ouch screen PLC 0 [ 3] , PLC 1/4, , , , Eview [ 1] , , , , , , , , , , [ 2] , 1 ,