The Application And Development Of Steam Management And Monitoring System In ANSTEEL

Known for high energy intensity, the steel industry consumes 4% of the total world energy. By the end of 2014, the total crude steel production is more than 1billion ton/year. Due to the high recycle rate(65%), in the long run, the iron and steel production based on iron ore would be the major model. And the steam represents near 10% energy. Steam could play adjustment and balance role for energy system,the residual gas and heat could be turned to steam which can be used for blast furnace blowing, RH vacuum steelmaking, pickling, cleaning and coating lines, etc. Therefore the steam system in steel industry is more complicated both in production, transport and end use. Firstly, the steam production equipment involves boiler and waste heat recovery system. And the steams are low, medium and high pressure, which are used for generator, processes and also for district heating in north. On effective way to save cost is to decrease energy loss in steam. Under this background, this paper focuses on the development and application of steam management and monitoring system. The main work as follow:Works have been done to figure out the real situation in the targeted company,which includes both on production and problems. The results show that steam production equipments include boiler and waste heat recovery such as CDQ, sintering and steelmaking waste recovery, steam from reheating furnace cooling and flue gas,and the steam account for 8% of the total energy. The problems are heat recovery steam releasing, degraded use, steams mixed in one pipeline, lack of schedule system,information platform and monitoring system, low accuracy measuring. The need for developing and built steam managing and monitoring system is urgent.Steam management system is developed. The main function include homepage,pipeline management, valve management, inspection management, valve adjustment management, pipeline alteration management, maintenance note management,planned maintenance management and system maintenance.A mathematic steam behavior mode is development. And there three sub-modes:topology mode, steam hydraulic mode and steam dynamic mode. The steam parameter is based on IAPWS-IF97. The calculation result is excellent agree with the actual tested results, the deviation is 6%, and meet the need of scheduling.The steam monitoring system is developed which have two parts: one for pipeline information maintenance and one for steam calculation.