【作者】 张华；

【导师】 邵林广；

【作者基本信息】 武汉科技大学 ， 市政工程， 2007， 硕士

【摘要】 水力失调是钢铁企业循环冷却水管网普遍存在的现象,如何实现循环冷却水管网的水力平衡,消除水力失调的运行工况,提高管网的经济性、安全性和可靠性,改善冷却水质量,这些是我国各钢铁企业目前所面临的问题。在循环冷却水管网中,循环冷却水处理还要解决换热设备的结垢和腐蚀问题。结垢与腐蚀降低了换热设备的换热效率、增加耗能,不但缩短了管道与设备的使用寿命,而且存在设备有可能爆炸的安全隐患。基于此,主要研究了以下三个方面的问题:1.以常见的水力工况变化为例,定性地分析了循环冷却水管网水力失调的规律性,针对影响水力失调的主要因素,提出了解决水力失调的途径与方法;2.分析了循环冷却水管网中换热设备产生结垢和腐蚀问题的成因,综合比较了国内外结垢和腐蚀防治方法的利弊,探讨了磁化水处理器在循环冷却水管网中对控制换热设备的结垢和腐蚀的作用;3.以武钢二冷轧工程循环冷却水管网安装调试平衡阀和磁化水处理器为例,采用初调节方法以确保水力管网达到最优化平衡状态,阐述了平衡阀和磁化水处理器初调节的原理和方法。通过对工程实例采用平衡阀和磁化水处理器前、后的技术经济比较,证明在循环冷却水管网中采用平衡阀,能有效地解决水力失调的问题,具有明显的节能降耗效果;磁化水处理器能够有效地控制循环冷却水管网中换热设备的结垢和腐蚀,不仅降低生产运行成本费用,而且减少了磷系药剂对环境的污染。更多还原

【Abstract】 As we know,hydraulic disorder is an ubiquitous problem ,which exits in the pipe network of circulation cooling water system of steel and iron enterprises.Therefore,at present a new problem faces Chinese steel and iron enterprises,that is how to realize the hydraulic banlance,elimineta the existing disordered running states ,enhance the utilization of pipe network economically,securely、reliably and improve the quality of cooling water.In the circulation cooling water system,the most important thing of water treatment is to solve the problem of exchanger’s smudge and corrosion.As the smudge and corrosion can influence exchanging efficiency,energy consume, not only reduce the life of pipe and equipment;but also exist the hidden danger of equipment explosion,therefore,according to the above,this paper focuces on the following three issues:1.Taking the ordinary changes of hydraulic disorder in circulation cooling water system.Aimed at the main influential factors for hydraulic disorder,we advance some approaches and solutions to settle down hydraulic disorder.2.This paper analyses the causes of smudge and corrosion brought about by exchanger of circulation cooling water system’s pipe network,makes a comparision synthetically between advantages and disadvantages of prevention measures against smudge and corrosion at home and abroad,and disadvantages of prevention measures against smudge and corrosion st home and abroad,and discusses the function of magnetized water processor which controls the smudge and corrosion of exchanger.3.Taking the example of the installation and commissioning of balanced valve and magnetized water processor of NO2 cooling rool mill engineering in WISCO circulation cooling water system’s pipe network,which adopts the way of primary adjustment to make sure the hydraulic system can reach the most optimized balanced stable,this paper explains the principle and method of balanced valve and magnetized water processor’s primary adjustment.Through the comparision of technology and economy before and after WISCO adopting balanced valve and magnetized water processor,we prove that it can solve the hydraulic disorder efficiently and also have good effect on energy reduction by adopting balanced valve in circulation cooling water system;magnetized water processor can also control the smudge and corrosion of exchanger in pipe network efficiently,by this way,it will not only reduce the production cost,but slao decrease the environment pollution caused by phosphorus chemical agents.更多还原