Research On Application Of Three Redundancy System In Nitric Acid Four In One Unit

Double pressurizing method is a more advanced production process of nitric acid preparation, equipment with compact structure, advanced production technology, high production efficiency, obvious energy saving effect, safe and reliable production advantages. Four in one unit is the associated process before and after process, provides to the system and from the core equipment of the system energy recovery, by the unit, the main power consumption of nitric acid production process fully realized system provide for oneself, and slightly rich output.This topic research, the design and implementation of the set of integrated control system is the goal of security, guarantee stable operation of Shenhua Wuhai energy West to nitric acid unit peak ammonium nitrate company core equipment of four in one unit, and then to realize the long cycle of continuous production of nitric acid unit. The unit integrated control system security mainly through four aspects, one is the axial gap monitoring of the conventional unit; two is the anti surge control for compressor unit; three is the rapid response of non normal conditions and emergency treatment; four is used for the cause of the accident to judge the event record.Design and implementation of the integrated control system is set around the unit interlock control logic start, also contains the unit axial gap monitoring and related to temperature, pressure, flow and regulation of conventional control; anti surge control of centrifugal compressor and air nitrogen axial How compressor; application of simulation and for the cause of the accident judgment SOE function module.After setup completing in the user configuration of hardware, application programming and communication parameters, the thigh before through the simulation test of the user application of TriStation1131software, to avoid the defects caused by mistakes in grammar and logic design vulnerability. The advantages of simulation test is the off-line simulation of it (i.e., debugging applications that do not rely on any hardware, For any application that has installed a TriStation1131software on the user’s computer is tested, testing whether the program mistakes in grammar and logic whether it meets the requirements, And to ensure that through the debugging process and the future site implementation will meet the design requirements. The subject of system operation platform is Windows XP operating system, development tools is Tristation1131(the system configuration) and Intouchl0.1(human machine interface), using a hardware system is currently the latest version of the TRICON control system of TS-3000, because of using three redundant hardware configuration of the automatic control system more safe and reliable, compared with the control the system adopts dual hot redundancy technology other, application of three heavy redundancy fault tolerance technology make the unit control operation more reliable, stable and safe, solid foundation for safe operation of production equipment and lay. make the safety of production equipment, continuous operation is possible.