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针对江苏徐州阚山电厂600 MW超超临界机组循环水泵冬季单泵运行方式循环水量富余的现状,通过循环水泵马达进行高低速改造,实现低温季节低速泵节能运行。 相似文献
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国电丰城电厂对4台机组凝泵变频改造后,机组低负荷阶段受给水泵密封水压力低的限制,未能充分发挥凝泵变频节能的效应。为此,该公司在给水泵密封水系统加装升压泵,通过调整凝泵运行方式,大大降低了凝泵的运行电流,实现凝泵变频的深度节能,提高了企业经济效益。 相似文献
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某电厂二期机组采用了苏尔寿生产的BDC-500-490/D3S型凝结水泵,随着凝泵变频改造后,变频凝泵A长时间偏离额定转速运行,对泵的重要部件的使用寿命和大修周期有明显影响,在运行过程中多次发生了扬水管裂纹、泵轴断裂的故障。通过运行方式、结构形式及解体情况的分析,提出凝泵备件国产化改造方案,对设备结构进行改进,提高了设备运行可靠性,降低了检修费用。 相似文献
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钦州电厂根据超临界600 MW机组结构特点、运行实际,采用汽封蜂窝、刷式等多种汽封形式对机组进行了改造。结果表明汽封改造是成功的,效果明显,具有推广价值。 相似文献
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循环水泵电机作为火力发电厂的重要一次电气设备,与机组同步长周期运行,是电厂最重要和最关键的设备之一。对火电厂技术经济指标"厂用电率"的影响较大。原循环水泵电机采用工频运行的方式工作,不能根据用水需求而调节,厂用电率高。根据多年的学习及对电机的使用的了解,决定改造其运行方式,将工频运行改造为变频运行。改造后循环水泵电机启动电流下降,厂用电率也同比下降,实现了电机的节能、增效。 相似文献
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350MW开式冷却汽轮机循环水的优化运行 总被引:1,自引:0,他引:1
根据凝汽器的工作特点及水泵的工作原理,在冬季采用单台循环水泵运行代替原设计双台循环水泵运行,并且通过调整凝汽器海水侧出口门的开度来找出单台循环水泵在冬季运行的最佳工作点,同时对循环水优化的安全性进行了详细的分析与阐述。通过循环水泵台数控制及凝汽器出口门的调节这两种优化运行方式,不仅节约了大量的厂用电,取得了明显的经济与社会效益,而且还具有很强的操作性及推广性,对电厂中其它设备的优化运行具有一定的借鉴意义。 相似文献
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叙述了内蒙古博源联合化工公司全厂循环水泵运行及水系统的问题,公司经过不断探索,最后运用“YCGF”节能型循环水系统改造使其彻底解决。主要通过系统综合优化调度的应用、循环水泵增效节能改造,总结了全厂循环水系统节能改造经验及设备选型中需注意的问题。 相似文献
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Lianying Zhang Min Zhou Chunfang Yang Yuefei Li Zhibo Fu Juanfang Wang Liwen Jin 《国际能源研究杂志》2020,44(12):9399-9413
Using high-temperature heat pump technology to recover waste heat of circulating cooling water in a steel plant for central heating system not can only reduce the temperature of circulating cooling water to meet the needs of smelting process but also can save energy and protect environment as well as bring great economic benefits to steel plant that can sell heat to the heat users. The energy consumption equation of heat pump central heating system was established based on the energy consumption of heat pump, energy consumption of water pump, and heat loss. The optimal inlet water temperature, inlet flow rate, and the number of operating heat pump modules at different outdoor temperatures were calculated by genetic algorithm. The superiority and operating control strategy of heat pump central heating system were discussed. The results show that with the increase of outdoor temperature, the optimal inlet flow rate and the number of operating heat pump module decrease. However, the inlet water temperature almost does not change. It is more suitable for the heat pump central heating system to change the inlet flow and the number of operating heat pump modules. The operating control strategy equation was established by linear fitting, which provides guidance for the engineering application of heat pump central heating system. 相似文献
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对天生桥水电站3台调速器油压控制回路存在的问题进行分析研究后,通过增加调速器油泵电机保护、扩展调速器油罐压力表电接点数目、修改完善调速器油泵顺控程序等措施,改造后解决了油泵电机经常烧毁、调速器备用油泵不能正常启动等缺陷,保障了调速器供油回路的可靠性。 相似文献
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《International Journal of Hydrogen Energy》2022,47(50):21435-21449
The hydrogen circulating pump is an essential component of hydrogen fuel cell systems. It plays a vital role in improving hydrogen utilization efficiency and optimizing hydrothermal control capabilities. Due to its compact design, high efficiency, and outstanding low-temperature adaption performance, the lobe hydrogen circulating pump has excellent potential for hydrogen recirculation in fuel cell vehicles (FCVs). This paper investigated the internal flow characteristics of a lobe hydrogen pump for FCV under different rotational speeds by experiments and computational fluid dynamics (CFD). Moreover, the lobe rotor domain was calculated using the dynamic mesh method. The effects of different rotating speeds on transient pressure pulsation, exhaust flow rate, external noise, and vibration were studied. The result reveals that the volumetric efficiency improves with the increased lobe rotor speed when the pressure ratio remains constant. The vibration acceleration level (VAL) and the external noise also increase. The vibration is most significant at the pump casing outlet and tends to decrease as the frequency increases. The sound pressure level spectrum has a discrete character in the low-frequency band, with peaks mainly concentrated at the rotating fundamental frequency and harmonics. The middle and high frequency bands have prominent broadband characteristics, and the energy is relatively concentrated. 相似文献
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国产化600MW超临界直流锅炉采用带有循环泵的启动系统,其主要特点是采用给水泵与循环泵并联运行的方式,提高了水冷壁在低负荷下运行的可靠性和经济性以及机组对负荷变化的跟踪性能.采用新一代启动系统可以对超临界直流锅炉启动过程中的循环流量调节、给水泵流量调节、储水箱水位调节、水冷壁由控制循环转为直流运行工况等复杂过程灵活控制.对启动系统的运行特点和本生点的技术选择问题进行了比较详细的分析. 相似文献
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火电厂循环泵运行方式对机组经济性的影响 总被引:3,自引:0,他引:3
通过定量计算的方法分析了循环水入口温度变化和循环泵运行方式改变与机组经济性之间的关系,为循环泵经济调度提供了依据,并对整个分析给出了详细的计算过程。 相似文献