【摘要】 液位控制在化工装置中应用非常广泛 ,控制方式也很多 ,合理选择控制方式可以实现较高的性能价格比。针对生产中一纯水罐的液位控制 ,提出 3种方案 ,经分析比较 ,选择一种最佳方案 :利用原有液位计、数显仪组成液位显示报警系统。增加继电器、电磁阀和调节阀组成自动系统。该方案投资少 ,实施方便 ,控制系统安全可靠 ,且完全满足工艺要求。更多还原

【Abstract】 The level control is widely used in chemical industry facilities and has multiple types.The reasonable selection of control method can attain high ratio of quality to cost.Three plans for the level control of pure water tank are put forward.After analysis and comparison,the optimum plan is selected:making use of the old level gauge and digital display instrument to constitute a level display and alarm system,adding a relay,an electromagnetic valve and a regulation valve to constitute an automatic system.This plan needs small investment and can be simply installed.The control system is dependable and can fully satisfy the demand of process.更多还原