共查询到20条相似文献,搜索用时 125 毫秒
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集装箱运输具有安全、高效、经济、快捷,能降低货损,因而它成为世界各国货物运输方式改革的总趋势。岸边集装箱卸船机是大型起重机械,是港口提高集装箱吞吐量的重要装卸设备。岸边集装箱卸船机的检验工作十分重要,不仅检验的项目多,而且有自身的特点,检验方法有别于一般的桥架型起重机。以上拱度和下挠度为例,随着超巴拿马型装卸桥的应用,由于工作幅度大,主梁上需要测试的点位多,采取普通的测量方法难以满足检验要求。 相似文献
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对白山水电站水轮机运行状况进行分析,提出了转轮改造方案,对转轮、基础环、尾水衬板等关键部件的改造施工工艺及关键技术进行了总结和阐述。改造后机组运行稳定,大大增强了机组运行的可靠性,实现了更好的经济效益。此项改造工程的成功实施,对于其他水电机组的改造具有一定的借鉴意义。 相似文献
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针对港口卸载船负荷频繁突变引起电网电压、频率严重波动的问题,配置了储能式柴油发电机组。具体介绍了该发电机组的设计以及试验情况。试验表明:储能式柴油发电机组改善了卸船机负荷频繁突变时柴油发电机组的运行状态,在保证运行经济性的前提下优化了供电品质,非常适用于港口行业的应急供电。 相似文献
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300MW机组空气预热器改造 总被引:1,自引:0,他引:1
嘉兴发电有限责任公司已经完成了一期 1号、2号锅炉空气预热器的改造项目 ,改造取得了成功。在改造中发现了一些问题 ,对这些问题进行了分析 ,提出了处理方案 ,改造的经验对同等级空气预热器的改造具有相当的参考价值 相似文献
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A novel energy and cost effective transport chain for stranded natural gas utilized for power production with CO2 capture and storage is developed. It includes an offshore section, a combined gas carrier and an integrated receiving terminal. The combined carrier will transport liquid carbon dioxide (LCO2) and liquid nitrogen (LIN) outbound, where natural gas (NG) is cooled and liquefied to LNG by vaporization of LIN and LCO2 onboard the carrier. The same carrier is used to transport the LNG onshore, where the NG can be used for power production with CO2 capture. The combined carrier consists of 10 cylindrical tanks with a diameter of 9.2 m and varying lengths from 14 to 40 m. The total ship volume is 13,000 m3. Assuming 85% capture rate of the CO2, the maximum ship utilization factor (SUF) is 63.4%. Due to the combined use of the storage tanks, the SUF is decreased with 1.4% points to 62%. The ship is equipped with a bi-directional submerged turret loading for anchoring and loading of NG and unloading of CO2. Two ships can deliver NG to and remove CO2 from a 400 MWnet power plant, and still obtain continuous production of LNG offshore without intermediate storage. The investment cost for each gas carrier is 40 million EUR giving total transport cost of 16.9 EUR/tonne LNG. The cost for the offshore transfer system is 6.6 million EUR per tonne LNG, whereas the cost for onshore storage and loading system is 3.1 and 0.8 million EUR per tonne LNG, respectively. The total specific costs for the ship transport, including onshore storage, loading shipping and offshore unloading are 27.5 EUR per tonne LNG for a roundtrip of 5 days, including voyage, production of LNG, unloading, connecting and berthing. 相似文献
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燃煤电厂循环流化床锅炉渣库粉尘防治措施 总被引:2,自引:0,他引:2
针对循环流化床锅炉渣库粉尘的防治,提出了其关键在于渣库库顶和渣库卸料口两处的抑尘措施,库顶可通过设置脉冲布袋除尘器和压力释放阀来解决粉尘问题,渣库卸料口可以设置喷雾除尘装置和改进卸料设备来抑制装车时产生的粉尘。 相似文献
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自适应学习误差模型船舶柴油机调速器的研究 总被引:1,自引:0,他引:1
船速控制的重要功能是维持船舶航速稳定和主机的热平衡,从而提高船舶操纵性能,以船-机-桨系统为控制对象的船舶调速器能够较好地实现这些功能.在分析船舶航速误差模型变化特性的基础上,应用激励函数的自适应神经网络和最陡下降法的非线性优化技术,提出了自适应学习误差模型控制方法,应用于船舶柴油机调速器控制系统.为验证新方法的有效性,在实验室条件下,建立了船舶柴油机调速器半实物仿真系统.仿真结果表明,新的船舶柴油机调速器在系统模型不确定和参数摄动情况下,能在线学习被控系统的动态特性,具有抑制扰动和参数摄动的能力,系统调节过程的稳定性和快速性都有提高. 相似文献
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通过三轴卸荷试验,系统分析了卸荷速率对卸荷过程中岩石力学特性的影响,研究了岩体的应力应变特征、卸载变形特征和破环特征,得到卸荷速率与变形模量及峰值围压的关系。结果表明,当卸荷速率小于0.02 MPa/s时,卸荷破坏变形模量随卸荷速率的增大呈非线性增长,破坏时的围压随卸荷速率增加呈非线性递减;当卸荷速率大于0.02 MPa/s时,变形模量呈线性增长,破坏时围压呈线性递减,但当卸荷速率增大到一定值时,变形模量将趋于稳定;不同卸荷速率与峰值围压的二次多项式拟合,相关系数都在0.90左右,说明采用二次多项式进行拟合是可行的。 相似文献
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It is proposed that electric power can be generated from wind by pulling a ship. A parafoil pulls and tows a ship. Electrical power is generated by hydraulic turbines installed on the ship below the water line. The electric power generated is expended onboard to electrolyze water to produce hydrogen or methanol or to convert carbon dioxide into storable forms of liquid. This paper describes the principle of designing such a system, shows the general features of such a system, and describes in detail two example designs which produce 6 MW and 0.8 GW. It is shown that a fleet of such ships operating in two different regions of the sea can produce much more energy than the world needs. 相似文献