锅炉给水自动控制系统设计

汽包锅炉给水自动控制的任务是使锅炉的给水量适应锅炉的蒸发量,以维护汽包水位在规定的范围内,以提高锅炉和汽轮机的安全性和经济性。     

小型热水锅炉单片机温度控制系统

介绍了用 80 31单片机构成的小型热水锅炉温度控制的最小系统 ,主要包括数学模型的建立、硬件电路的设计和软件程序的分析 .     

不锈钢锅筒破裂成因浅析

某市一台运行中的全不锈钢小型汽水两用锅炉,定期检验试压时发现锅筒出现裂纹,为探究其成因,通过进行综合性检验评定,采用高倍电子显微镜对裂纹形貌,特征及晶界进行了分析,从而给产品监检,制造生产部门提供一些有意义的参考意见。     

High-Temperature Corrosion of Protective Coatings for Boiler Tubes in Thermal Power Plants

High-temperature corrosion is a serious problem for the water-wall tubes of boilers used in thermal power plants. Oxidation, sulfidation and molten salt corrosion are main corrosion ways.Thereinto, the most severe corrosion occurs in molten salt corrosion environment. Materials rich in oxides formers, such as chromium and aluminum, are needed to resist corrosion in high-temperature and corrosive environment, but processability of such bulk alloys is very limited. High velocity electric arc spraying (HVAS) technology is adopted to produce coatings with high corrosion resistance. By comparison, NiCr (Ni-45Cr-4Ti) is recommended as a promising alloy coating for the water-wall tubes, which can even resist molten salt corrosion attack. In the study of corrosion mechanism, the modern material analysis methods, such as scanning electron microscopy ( SEM ), X-ray diffractometry (XRD) and energy dispersive spectrometry (EDS), are used. It is found that the corrosion resistances of NiCr and FeCrAl coatings are much better than that of 20g steel, that the NiCr coatings have the best anti-corrosion properties, and that the NiCr coatings have slightly lower pores than FeCrAI coatings. It is testified that corrosion resistance of coatings is mainly determined by chromium content, and the microstructure of a coating is as important as the chemical composition of the material. In addition, the fracture mechanisms of coatings in the cycle of heating and cooling are put forward. The difference of the thermal physical properties between coatings and base metals results in the thermal stress inside the coatings. Consequently, the coatings spall from the base metal.     

蒸汽锅炉低负荷运行对水动力可靠性的影响

本文从水动力可靠性方面对Y-130/39-2型锅炉低负荷运行的安全性进行研究和分析.结果表明:50%负荷以上水循环可靠;40%负荷循环流量有波动,但水循环可靠;30%负荷不宜长期运行;20%负荷不宜运行.     

浅析常压锅炉房与有压锅炉房设计中水压图的不同及相关问题

通过对比常压锅炉房与有压锅炉房设计中运行水压图的差异,指出常压锅炉房设计中区别于有压锅炉房的两个问题：循环水泵扬程的确定及回水管压力消耗的控制．     

浅谈单元机组的负荷自动控制

通过对现代大型火力发电机组的负荷控制特点的分析,全面介绍和分析适用于单元机组的负荷自动控制系统。     

高层建筑集中直连供暖装置的优点与应用

本文对集中供暖的优点进行阐述,并对在高层建筑采暖系统中集中使用直连供暖装置进行分析和探讨。     

炉水低磷酸盐处理技术在电厂中的应用探讨

盐类隐藏和腐蚀现象是协调磷酸盐处理过程中主要的问题,通过对国电双鸭山有限公司部分锅炉进行低磷酸盐处理试验,结果表明:采用低磷酸盐处理后,水汽质量合格率大幅提升,经过长时间的运行实施效果良好。     

氧化锆测氧仪在锅炉节能控制中的应用

采用氧化锆测氧仪连续测定锅炉烟气中的氧含量,据此控制燃烧时的空燃比,以实现合理燃烧、节约能源和环境保护的目的。