基于卡琳娜循环的电厂机组降耗提效技术
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摘要
随着火电机组规模扩大,常规火电厂产能热效率利用已达瓶颈。且受到朗肯循环参数限制,发电过程中水蒸气热损耗较高,并会伴随着一定程度上的环境污染。文中基于卡琳娜循环技术,提出一种针对火电机组的降耗提效方案。通过深入分析卡琳娜循环工作原理,将其与火电机组循环发电过程结合应用,充分发挥循环优势,突破热转化效率瓶颈,进一步提升火电机组管道余热及排气凝结热利用率。此外,该种技术可深度利用化学能转化热能循环过程中存在的各类固有热损,完成降低热耗、提升发电效率的双向优化。经实际运行测试结果表明:此技术能在不影响原电场循环热效率的前提下,提升机组发电功率近1%。
With the expansion of thermal power unit,the utilization of thermal efficiency of conventional thermal power plant has reached the bottleneck. The limit parameters of Rankine cycle power generation process,water vapor heat loss is higher,and will be accompanied by a certain degree of environmental pollution. In this paper,based on the Karina cycle technology,a scheme for reducing consumption of thermal power units is proposed. By analyzing the working principle of Karina cycle and combining it with the cycle generating process of thermal power units,we should give full play to the advantages of circulation and break through the bottleneck of thermal transformation efficiency,and further improve the utilization of heat and exhaust condensing heat of thermal power units. Besides,this technology can make full use of chemical energy to transform all kinds of inherent heat loss existing in heat cycle process,and complete two-way optimization of reducing heat consumption and improving power generation efficiency. The test results show that the power generation power of the lifting unit can be nearly 1% without affecting the thermal efficiency of the original electric field cycle.
With the expansion of thermal power unit,the utilization of thermal efficiency of conventional thermal power plant has reached the bottleneck. The limit parameters of Rankine cycle power generation process,water vapor heat loss is higher,and will be accompanied by a certain degree of environmental pollution. In this paper,based on the Karina cycle technology,a scheme for reducing consumption of thermal power units is proposed. By analyzing the working principle of Karina cycle and combining it with the cycle generating process of thermal power units,we should give full play to the advantages of circulation and break through the bottleneck of thermal transformation efficiency,and further improve the utilization of heat and exhaust condensing heat of thermal power units. Besides,this technology can make full use of chemical energy to transform all kinds of inherent heat loss existing in heat cycle process,and complete two-way optimization of reducing heat consumption and improving power generation efficiency. The test results show that the power generation power of the lifting unit can be nearly 1% without affecting the thermal efficiency of the original electric field cycle.
引文
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[3]秦文戈.低温余热回收技术在芳烃联合装置中应用[D].广州:华南理工大学,2014.
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[5]付文成.中低温地热能双吸收Kalina循环系统热力学优化与实验研究[D].天津:天津大学,2014.
[6]邵振华,郑子辉,于文远,等.,基于正逆循环的节能技术[J].新能源进展,2015(4):12-18.
[7]张俊锋.煤矿烟气余热回收利用技术研究[D].武汉:武汉理工大学,2012.
[8]罗琼.火灾工况下介质汽化潜热的估算[J].中国石油和化工标准与质量,2013(14):222-226.
[9]宋忠源,李林星,陈盼盼,等.基于EES的一级蒸馏Kalina循环的热力学分析[J].发电与空调,2015(4):66-69.
[10]岳秀艳,韩吉田,于泽庭,等.设置富氨蒸气回热器的固体氧化物燃料电池/燃气轮机/卡琳娜联合循环系统的热力性能分析[J].中国电机工程学报,2014,34(26):4483-4492.
[11]赵洪滨,杨倩,江婷,等.SOFC—联合循环系统性能分析[J].工程热物理学报,2014(5):848-853.
[12]彭烁.塔式太阳能间冷-回热燃气轮机与卡林那联合循环热力特性研究[D].武汉:华中科技大学,2011.
[13]彭烁,洪慧,金红光.太阳能燃气轮机与卡林那循环联合的热发电系统[J].工程热物理学报,2012,33(11):1831-1835.
[14]赵洪滨,江婷,杨倩.3种新型煤层气集输系统增压驱动方案[J].热能动力工程,2015,30(5):708-714.
[15]许臣.煤基SOFC/IGCC联合循环系统性能研究[D].镇江:江苏科技大学,2011.