In recent years the size of single-unit sulfuric plants has increased . 近年来单机组硫酸厂规模已经扩大。
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2 . single distributed control system 单机组现场分散控制。
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The control box of workshop is designed . the cpu226 of s7 - 200 plc is selected as the computer on the spot . the software package of step7 - microwin is used for programming 配置单机组现场控制箱,采用simens公司s7 - 200系列plccpu226作为现场控制计算机,运用simens公司的step7 - microwin可编程序控制器编程软件建立下位plc控制程序,实现温湿度模糊自适应自动控制。