共查询到18条相似文献,搜索用时 109 毫秒
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介绍了梅钢公司利用余热饱和低压蒸汽进行发电的技改方案,通过蒸汽平衡、现场调研,对热轧加热炉汽化冷却回收的蒸汽考虑发电和并网或不并网运行,实现余能、余热充分利用,节能增效。 相似文献
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针对某钢铁企业转炉及加热炉的蒸汽现状,建设一座3MW余热电站用于有效回收利用转炉及加热炉蒸汽.文中从余热利用方案、主要设备参数、余热利用系统、主厂房布置等方面进行了论述,详细介绍了饱和蒸汽发电技术在该钢铁企业的应用情况.饱和蒸汽发电技术的应用为节能减排、环境保护做出了巨大贡献,同时也为企业创造了可观的经济效益. 相似文献
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结合炼钢电炉饱和蒸汽余热发电的工程实例,介绍炼钢电炉的余热统计情况和余热发电系统的技术方案。余热发电技术在炼钢电炉的成功应用,开辟了电炉节能减排的新途径,取得了显著的经济效益和社会效益。 相似文献
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线聚焦太阳能真空集热管 总被引:1,自引:0,他引:1
槽式太阳能热发电利用槽式抛物面聚光器聚光,通过线聚焦太阳能真空集热管集热,获取近400℃左右的高温,然后借助高温导热油导热,通过常规换热技术获得蒸汽,或直接获取饱和蒸汽推动汽轮发电机组发电。由于槽式太阳能热发电所要求的集热器工况温度和压力相对较低,可以利用较为成熟的换热设备和发电技术,单位投资成本低, 相似文献
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本文提出一种新型水泥工业余热与生物质能互补发电系统,该系统采用水泥窑低温余热和生物质补燃有机结合的方式大幅提高水泥窑余热发电蒸汽参数与系统效率。来自水泥生产线窑头和窑尾的低温余热烟气全部用来加热工质水产生饱和蒸汽,饱和蒸汽进入生物质补燃系统中进行过热后送入汽轮发电机组中做功发电,补燃燃料为生物质气化燃气。本研究建立了单压和双压2种互补发电系统,分析了其热力学性能,结果表明:单压互补发电系统与传统单压纯低温发电系统相比,系统循环热效率和系统发电效率分别提高了1.63和1.92个百分点。双压互补发电系统与传统双压纯低温发电系统相比,系统循环热效率和系统发电效率分别提高了1.05和1.53个百分点。 相似文献
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低压饱和蒸汽汽轮机的应用及其发展前景 总被引:1,自引:0,他引:1
节能减排是实现可持续发展的重要途径,在化工、石油、冶金、轻工、建材、环保、纺织、造纸等工业企业存在大量的低品位能源——低压饱和蒸汽,这些低品位能源除少量回收利用外,大量排空,造成极大的能源浪费和环境污染,开发研究低品位能量的回收利用方法具有重要的学术意义和工程应用价值。论文对低品位热能的回收利用方法和关键技术进行了系统的分析,对低压饱和蒸汽特种工业汽轮机技术进行了介绍,所做工作对于工业企业节能降耗具有重要的参考价值。 相似文献
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The impacts of variations of turbine exhaust steam wetness, live steam parameters, and the turbine sectional pressure ratio on the thermodynamic efficiency of the saturated steam cycle in a PWR secondary system are analyzed. The effects of live steam parameters and turbine sectional pressure ratio on the thermodynamic efficiency and the turbine exhaust steam wetness for the superheated steam cycle are also investigated. The optimum ranges of operating parameters are proposed based on the comparison of the performance of the superheated steam cycle with that of the saturated steam cycle. © 2001 Scripta Technica, Heat Trans Asian Res, 30(3): 185–194, 2001 相似文献
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Sun Jin-wu 《锅炉技术》1998,(9)
淮阴发电厂9号炉主汽温度一直偏低,严重影响机组运行的安全性和经济性。通过中修和试验查明主要原因是饱和蒸汽带水,分析了造成地和蒸汽带水的各种因素,为解决此问题和提高安全、经济运行创造条件。 相似文献
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根据国际新工业标准IAPWS—IF97公式计算的数据,利用最小二乘法的原理,在饱和蒸汽的工业锅炉压力等级系列适用范围内,以绝对压力p为变量,拟合出干蒸汽焓h''、干饱和蒸汽比容v''、饱和水焓h'、汽化潜热r(△hv)、饱和水比容v'的函数表达式,最终给出由给水压力pgs和给水温度tgs表示的给水焓hgs给水密度ρgs表达式,这些函数表达式,可用于饱和蒸汽工业锅炉性能试验、热力统计、能源审计等的计算,具有精度高,适用范围大,便捷、实用的特点。 相似文献
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Based on experimental data, typical off-design characteristic curves with corresponding formulas of internal combustion engine
(ICE) are summarized and investigated. In combination with analytical solution of single-pressure heat recovery steam generator
(HRSG) and influence of ambient pressure on combined heat and power (CHP) system, off-design operation regularities of ICE
cogeneration are analyzed. The approach temperature difference ΔT
a, relative steam production and superheated steam temperature decrease with the decrease in engine load. The total energy
efficiency, equivalent exergy efficiency and economic exergy efficiency first increase and then decrease. Therefore, there
exists an optimum value, corresponding to ICE best efficiency operating condition. It is worth emphasizing that ΔT
a is likely to be negative in low load condition with high design steam parameter and low ICE design exhaust gas temperature.
Compared with single shaft gas turbine cogeneration, ΔT
a in ICE cogeneration is more likely to be negative. The main reason for this is that the gas turbine has an increased exhaust
gas flow with the decrease in load; while ICE is on the contrary. Moreover, ICE power output and efficiency decrease with
the decrease in ambient pressure. Hence, approach temperature difference, relative steam production and superheated steam
temperature decrease rapidly while the cogeneration efficiencies decrease slightly. It is necessary to consider the influence
of ambient conditions, especially the optimization of ICE performances at different places, on cogeneration performances. 相似文献