Optimization and transformation of molecular sieve instrument control system of No.2 oxygen generator in Xuangang
The original instrument control mode of molecular sieve of No.2 oxygen generator in Xuanhua Iron and Steel Company is typeⅢinstrument control. With the expansion of the production scale of No. 2 oxygen generator, the typeⅢinstrument control mode can no longer meet the control requirements of the oxygen generator, therefore, Xuanhua Iron and Steel Company decided to upgrade the instrument con⁃trol mode of molecular sieve of No.2 oxygen generator to DCS centralized control mode. This paper sys⁃tematically analyzes the disadvantages of the type Ⅲ instrument control mode, explains the hardware composition and advanced control functions of the DCS control system, and details the implementation plan of the molecular sieve instrument control upgrading reconstruction project. After the implementation of the transformation project, the unplanned shutdown accidents of the No.2 oxygen generator caused by the problems of the typeⅢinstrument were significantly reduced, the oxygen generator unit operated sta⁃bly, and the output of oxygen and nitrogen increased significantly, and bringing considerable economic benefits to the enterprise.
oxygen generatormolecular sieveinstrument control systemtypeⅢinstrumentDCS con⁃trol system
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