Simulation Study Of Sintered Iron And Steel Plant Low Temperature Waste Heat Power Generation Dcs And Intelligent Control

Using sinter-circle-cooling machine to cool sinter and at the same time, adopting low temperature waste heat gas to generate electricity in iron and steel factory, it is an important way to save energy, reduce consumption, improve product efficiency, and achieve sustainable development. The waste heat boiler is a control plant that has features of multi-input/output, and coupling tightly multivariable, which has great particular control scheme. Currently a set of full-scale automation control system has not been worked out. Based on a waste heat power plant project in KunSteel iron and steel factory in Yunnan, A set of DCS for the waste heat boiler has been projected, in order to help to the waste heat boiler automation level in China.Water level of boiler drum, condensator and deaerator are major parameters. The traditional cascade PID and intelligent control method used in other normal boiler cannot be used in the waste heat boiler because of its particularity. After analyzing dynamic feature of the waste heat boiler drum, based on cascade three impulse control method, the fuzzy-neural control algorithm is introduced and composite control strategy based on RBF fuzzy-neural network and on line self-tuning for PID parameters is applied to water level control system of waste heat boiler drum in sinter-circle-cooling machine, and the simulation is carried out. If the experimental work is carried out, the paper applies these control rules to distribute control system (DCS) with VC programme and OPC technology.Field control station of DCS for the waste heat power plant is made up of FM801 redundant controller and FM I/O modules of HOLLIAS Group, which carries out data acquisition and process control; the SCADA system is composed of Engineer Station (ES) and Operation Station (PS). ES installed ConMaker (Control Build M) software, can perform configuration, adjustment parameter and debugging on line; PS installed FacView software, has the function of data display and HMI operation.The computer network has two layers. The lower layer between field controller and I/O modules is made of Profibus-DP Field bus, the upper layer between ES and PS is made up of twisted-pair Ethernet ring network. ES and PS has formed the LAN, which is a part of the MIS of the whole plant, ensuring information shared in the sinter-circle-cooling production.The results of simulation of water level control for waste heat boiler drum based on fuzzy-neural adaptive PID control show that the control system has strong stability, better adaptability, and good control quality. It can implement control tasks well and provide a reference for controlling water level of drum effectively.If DCS of the paper is put into operation, it will have high reliability and safety. Furthermore, DCS will reduce the labor intensity of the site operator, provides a strong guarantee for energy-saving and emission-reduction, consumption reduction and efficiency-increasing in iron and steel enterprise.