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Desulfurization Computer Control System
 

  China is coal-dominated energy structure in the country, are large and medium-sized coal-fired generating units have begun supporting desulphurization equipment. Desulfurization method consists of wet and dry / semi-dry. According to various desulfurization process, the company desulfurization technology expert and computer control system, after years in the chemical industry, power plant and environmental sectors scene practical experience, summed up a set of mature advanced control programs, and developing FGD's expert control system software, embedded control system DCS called DLFGD-3000 coal-fired generating units desulfurization Island computer control system. The system is mainly used for coal-fired power plant boiler island desulfurization system detection, alarm, control and management.

  According to crew size and characteristics of rational allocation Host Operator Station engineer and the number of field control, according to manufacturers need to be configured to MIS information systems throughout the plant control integration, but also provide the system with the host DCS systems and PLC remote control system interface, with flexible opening caving. Real-time monitoring software to support real-time database and network database, user-friendly and can easily and accurately complete the process of running Desulfurization Process surveillance tasks.

System features

  To meet all sizes desulfurization unit control technology requirements, and cost-effective.

  Follow the "centralized management and decentralized control" principle.

  Using advanced, safe, reliable system, the overall performance reached the international advanced level.

  The process (functional) intelligence unit set up local monitoring system, the acquisition modules process data, the control unit the equipment, coordination unit within the process.

  Modular control system with manual, automatic and remote control operates in three modes, set up local control interface for the control of the scene equipment and system debug.

  There FGD control room, the establishment of a central monitoring desulfurization system, the management of the whole plant desulfurization system in operation.

  To achieve the level of control without the support of field personnel in the control room FGD completed installation of the FGD normal Commitment, the completion of the normal surveillance operation, operation and troubleshooting.

  Based on UTP / Industrial Ethernet fiber connecting the central control unit and the control system, through gateways and decentralized control unit to exchange information between systems and to achieve the unit operator station for monitoring desulfurization system.

  The system compatibility, compatibility of other smart meters fieldbus products.

  The main control functions

  1. Analog Control System MCS

  Tobacco conditioning duct system complete the main gas system pressure, flow matching and emergency protection.

  Desulfurization performance optimization control expert control system to achieve the main material balance control, the realization of various operating conditions defined to achieve low cost, high efficiency operation optimization objectives.

  Gypsum dehydration system regulating main task is to maintain a vacuum belt filter cake thickness, filter cloth cleaning water tanks, water tanks filtrate water level in the required value.

  Utility system is used to control the level of water.

  2. Sequence Control System (SCS)

  Sequence Control System in accordance with the requirements of the different levels of control, boiler flue gas desulfurization equipment and coordination between the control and operation.

  Drive Control FGD drive - including all motor and solenoid valve actuators and other devices.

  Group-level control to a main and auxiliary equipment for the Commitment-group-level control.

  Function-level control function control system necessary to set up break point, after a small amount of operator intervention and confirmed some information, a complete set of desulfurization system start / stop.

  Interlock, protection and the police under the process set up conditions for the effective operation of the interlock device can automatically in the accident condition resection. Large installations important equipment design a reliable interlock system failure and record the first out conditions for important signal redundancy.


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