PXI-4351 185450D-01在线销售PLC/DCS系统模块
¥6000.00
SCXI-1140在线销售PLC/DCS系统模块
¥6000.00
MTL MTL5053大量库存实拍自动化控制模块
¥4000.00
D138-002-001大量库存实拍自动化控制模块
¥4000.00
PPT5200 661-0337大量库存实拍自动化控制模块
¥4000.00
FBM216b P0927AJ大量库存实拍自动化控制模块
¥4000.00
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The liquid ammonia storage and transportation section is an important part of the technical transformation project of Guizhou Hongfu Industrial Development Co., Ltd. for the annual output of 800000 tons of heavy calcium plant to ammonium phosphate. The designed ammonia unloading capacity is 250 tons / hour and the buffer capacity of tank farm is 9000 tons. Ammonia is a gas at normal temperature and atmospheric pressure, which is flammable, explosive, toxic and harmful; The storage and transportation section of liquid ammonia is one of the high risk areas of the head office. Safety production is the key point to be considered in the automatic control system. 2.2. overview of control system:
In order to improve the safety of production, the strategy of "3 out of 2 voting" is adopted for important process parameter points in this control system, and 21 automatic interlock circuits are designed to protect the production process; In order to ensure the smooth operation of the production process and energy saving and consumption reduction, six regulating circuits are designed. In order to facilitate monitoring and operation, a general picture of the flow picture is designed in the operation station, which shows a batch of process parameters, equipment operation status and alarm information closely related to safety production; The related local flow chart is designed for other chemical unit operation process, and various detailed production information related to it is displayed comprehensively; According to the operator&＃39;s habits, four groups of pictures are designed in the operation station, which display temperature, pressure, flow and liquid level signals; The adjustment screen is designed for six control circuits, which can realize the PID parameter setting, the manual mode switching and the manual operation of the regulating valve; The pop-up switch screen is designed for 21 main valves respectively, which can realize the automatic control or remote control of the production process; The historical trend chart of the main process parameters is designed, which provides data for fault diagnosis and optimal control.
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