瑞明电厂凝汽器腐蚀原因分析及改造

分析了广州瑞明电厂2台125MW凝汽式汽轮发电机组凝汽器腐蚀原因,并对采用钛管代替铜管的可行性、改造的技术、施工方案、经济性及应注意的问题进行了分析阐述。改造效果明显,为相近水质的电厂凝汽器或换热器改造提供了参考。     

大型汽轮机凝汽器改造可行性研究

大型汽轮机凝汽器将冷却管由铜管改造为不锈钢管已发展成为一种趋势,然而国内很多机组在决策是否进行改造工作时存在盲目性。通过大型汽轮机凝汽器改造可行性研究,提供了凝汽器改造收益和投资回报计算方法,并重点分析了凝汽器实际运行性能对改造工作投资收益的影响,为大型汽轮机凝汽器改造的决策工作提供了指导建议和决策方法。     

630MW机组凝汽器换管改造后性能及经济性分析

介绍扬州第二发电有限责任公司630MW亚临界机组配套凝汽器的运行特性,针对凝汽器运行现状和存在的问题,分析原因,并提出凝汽器铜管更换为不锈钢管的改造方案;通过凝汽器改造前后参数的对比分析凝汽器改造后的性能及节能效果,各项性能指标基本达到了预期的改造目标和效果,经济性明显提高,运行良好。为同类机组的凝汽器换管改造工作提供一些参考。     

薄壁铜管凸圆成型装置的设计

介绍一种给薄壁铜管起凸圆成型装置的运动方案、基本结构。该装置具有结构合理的特点，可大大提高铜管的加工效率。     

均热炉采用蓄热燃烧技术的节能分析及应用

从燃料热利用率分析出发，对均热炉改造的方案进行了节能情况分析，用于指导均热炉的改造实施，从分析得知采用空气单蓄热、煤气预热的方案可以实现节能约16％，通过实际运行对计算结果进行了验证，该方案的成功实施对周期性的室式炉节能改造具有良好的指导意义。     

多向扰流不锈钢螺纹管在凝结器中的应用

针对韶关电厂300 MW发电机组凝结器效率低、端差大、频繁出现渗漏等情况,提出了在不改变凝结器内部结构的前提下,用多向扰流不锈钢螺纹管替代铜管的改造方案,以提高凝结器换热效率,降低管道结垢、腐蚀速度,以达到消除渗漏、提高设备效率的目的.同时,对多向扰流不锈钢螺纹管换热性能进行了详细的分析,并对改造后的效果进行了对比.     

DHN型锅炉省煤器的改进与优化设计

对DHN型热水锅炉的省煤器进行了改造，对省煤器的配置问题做了探讨，找到了铜管省煤器与铸铁省煤器的最佳分界面，从而降低了DHN型锅炉的制造成本，提高了锅炉运行的可靠性，为制造单位和运行使用单位提供了可以借鉴的理论依据。     

不锈钢管在凝汽器上应用分析

本文针对电站的凝汽器通常所用的传热管管材为铜管的缺点和不足，提出采用焊接的有缝不锈钢管取代铜管。并做了可行的技术和经济分析，技术上可行，可杜绝铜管凝汽器的泄漏经济上与铜管的成本相当，且使寿命较铜管的可提高一倍以上。     

薄壁铜管凸圆成型装置的设计

介绍一种给薄壁铜管起凸圆成型装置的运动方案、基本结构.该装置具有结构合理的特点,可大大提高铜管的加工效率.     

生活区蒸汽锅炉的改造与节能

通过生活小区蒸汽锅炉每年运行维护费用的分析和热负荷计算，提出了蒸汽锅炉的改造方案。     

铜陵电厂凝汽器黄铜管换不锈钢管

经过多方面的调查、试验和研究,铜陵电厂将1号机凝汽器HSn70-1黄铜管全部换成了304不锈钢管,与黄铜管相比,不锈钢管具有较好的耐蚀性能、机械性能、经济性能,,总的传热性能也不差,取得了较好的效果。     

真空状态下等离子注入铜管管束的换热特性

进行了不同真空度下单管的凝结试验，研究了真空状态下等离子注入铜管管束的换热特性，以及其换热系数随Re数的变化情况，并与普通铜管管束的换热性能进行比较。研究表明：两种管束的凝结换热系数和总换热系数都随着真空度的提高而增大，而且真空状态下等离子注入铜管表面较普通铜管有更好的换热性能。在较高真空度（0．05MPa）和较大Re数（34755）下，等离子管束的总换热系数约为普通铜管管束的1．43倍，凝结换热系数约为普通铜管管束的2倍。图6表1参11     

TP316L不锈钢管在以中水作为循环水补水的凝汽器中的应用

中水对凝汽器铜管腐蚀性强,导致凝汽器频繁发生泄漏。通过采用TP316L不锈钢管替代铜管,并做好不锈钢管的安装及运行维护工作,解决了中水对凝汽器管的腐蚀问题,保证了凝汽器安全运行。     

1021t_h 煤粉锅炉高温炉烟管改造方案设计

通过对某电厂１０２１ｔ／ｈ煤粉锅炉制粉系统高温炉烟管的技术方案设计,分析了高温炉烟管在运行中产生故障的原因,阐述了方案的设计思想,提出了一种新型的高温炉烟管结构。     

兖矿南屯电力分公司某锅炉顶棚水冷壁爆管的分析与治理

循环流化床锅炉的爆管是影响电厂安全运行的最主要原因,给企业造成巨大的经济损失.本文详细介绍了兖矿南屯电力分公司某锅炉顶棚水冷壁的爆管情况,针对同一部位水冷壁频繁爆管做了分析,提出了相应治理方案,并在现场实际中改造应用,有效控制了爆管的问题.     

84MW大型层燃水火管热水锅炉的开发

通过对84MW大型层燃水火管热水锅炉的开发,不仅成功地解决了水火管热水锅炉进一步大型化的各项难题,而且也为当前市场上29～70MW水火管锅炉产品结构和性能的进一步完善与提高提供了有益的参考。     

Influence of processing conditions of polymer film on dropwise condensation heat transfer

The effect of processing conditions of polymer film on dropwise condensation heat transfer of steam under atmospheric pressure is investigated to find an effective technique to prepare a viable polymer film sustaining long-term dropwise condensation pattern state. The polytetrafluoroethylene (PTFE) films were coated on the external surfaces of brass tubes, copper tube, stainless steel tube and carbon steel tube by means of the dynamic ion-beam mixed implantation technique, with a variety of surface processing conditions. The experimental results indicated that heat flux is increased by 0.3-4.6 times and condensation heat transfer coefficient by 1.6-28.6 times of film condensation values for the brass tubes treated with various conditions. The surface processing condition is crucial to the adhesion between polymer film and metal substrate, different substrate material requires different optimal processing condition, and leads to different condensation heat transfer characteristic.     

Numerical evaluation of the heat transfer in a shell and corrugated coil tube heat exchanger with three various water-based nanofluids

In this paper, turbulence heat transfer and nanofluid flow in a shell and corrugated coil tube heat exchanger are evaluated numerically. The three-dimensional numerical simulations have been done by finite volume method using a commercial computational fluid dynamics code. The spatial discretization of mass, momentum, turbulence dissipation rate, and turbulence kinetic energy equations has been achieved by a second-order upwind scheme. A SIMPLE algorithm has been used for velocity–pressure coupling. To calculate gradients, Green-Gauss cell-based method has been utilized. The cross-section of the coil tube is lobe shaped. First, the impact of corrugated tube cross-section type and then, the impact of utilizing different types of nanofluid on thermal performance are investigated. The outcomes indicate that at high Reynolds number, utilizing a five-lobe cross-section causes augmentation in Nusselt number and pressure drop by about 4.8% and 3.7%, respectively. However, the three-lobe type shows the highest thermal performance. Moreover, water/CuO has the most thermal performance. As the volume concentration of the nanofluid increases, the thermal performance declines.     

Experimental research and theoretical analysis of anti-fouling characteristics on the surface of Ni-based implanted tube

The surface fouling of different tubes in boiling conditions are studied through experiments, which include Carbon steel tube, stainless steel tube, brass tube, and Ni-based implanted tube. Their anti-fouling characteristics and induction period are analyzed by the theory of surface energy. The experiments show that the boiling time is asymptotic regarding to fouling mass in unit area to Ni-based implanted tube, while it is linear in terms of fouling mass in unit area to other three tubes. Furthermore, the induction period of Ni-based implanted tube is two times of the others'. It is concluded that Ni-based implanted tube has better anti-fouling characteristic and longer induction period, which makes it good surface for anti-fouling purpose.     

安康水电厂3~#水轮机尾水管抗磨蚀处理

针对安康水电厂水轮机尾水管磨蚀破坏情况进行了分析 ,提出了利用喷涂技术进行抗磨蚀处理的方法。结合安康水电厂的实际情况 ,对喷涂材料、喷涂方法进行了试验和研究 ,最终选出最佳方案