石油化工设计 ›› 2022, Vol. 39 ›› Issue (2): 8-12.doi: 10.3969 /j.issn.1005 -8168.2022.02.003

• 设计技术 • 上一篇    下一篇

燃气轮机+余热锅炉汽电联产系统设计及影响因素研究

曹欢   

  1. 中国石化工程建设有限公司,北京 100101
  • 收稿日期:2021-10-13 接受日期:2021-10-13 出版日期:2022-06-06 发布日期:2022-06-06
  • 通讯作者: 曹欢,caohuan@sei.com.cn E-mail:caohuan@sei.com.cn
  • 作者简介:曹欢,男,2015年毕业于北京科技大学动力工程专业,硕士,工程师,主要从事石化行业热工专业设计工作。联系电话:010-84876804;E-mail:caohuan@sei.com.cn

Design of Gas Turbine and HRSG Cogeneration System and the Study on Influencing Factors

Cao Huan   

  1. SINOPEC Engineering Incorporation, Beijing, 100101
  • Received:2021-10-13 Accepted:2021-10-13 Online:2022-06-06 Published:2022-06-06
  • Contact: Cao Huan,caohuan@sei.com.cn E-mail:caohuan@sei.com.cn

摘要: 以某装置15MW燃气轮机+双压余热锅炉系统为对象,研究了采用Thermoflow软件建模并进行变工况分析的过程,通过装置实际运行结果验证了该软件流程模拟的准确性,证明该软件具备工程设计的可靠性。利用该软件进行了燃气轮机、余热锅炉汽电联产系统的影响因素分析,结果表明:随着环境温度的升高,燃气轮机出力降低,燃气轮机出力在环境温度40℃时比-10℃时减少26.9%;当环境温度低于15℃时,燃气轮机发电效率随温度上升而增加;当环境温度高于15℃时,燃气轮机发电效率随温度上升而降低。而环境相对湿度总体上对燃气轮机系统影响不大。随着燃气轮机负荷的增加,燃气轮机发电效率值显著提升,燃气轮机100%负荷运行时效率值比50%负荷时提高5.7%。燃气轮机排气温度随着燃气轮机负荷增加呈近似线性降低,当负荷提升到87.5%及以上时,燃气轮机排气温度稳定在506℃左右。余热锅炉排烟温度随着燃气轮机负荷的增加而提高,且均在149℃以上。燃气轮机满负荷运行时,汽电联产系统供热量为25804kW,汽电联产系统的总热效率随着负荷的增加而增加,当燃气轮机负荷达到87.5%时,汽电联产系统总热效率值最大,为87.07%。文章提及的研究结果为装置优化运行和进一步节能降耗改造提供了理论依据和数据支持

关键词: 燃气轮机, 余热锅炉, Thermoflow, 系统设计

Abstract: Taking a 15 MW gas turbine and double-pressure heat recovery steam generator (HRSG) system as the object, the process of modeling and variable condition analysis by Thermoflow software was studied. The accuracy of the process simulation of the software was verified by the actual operation results of the plant, and the reliability of the software in engineering design was proved. The influencing factors of gas turbine and HRSG co-generation system were analyzed by using the software. The results showed that the gas turbine output decreased with the increase of ambient temperature, and the gas turbine output at 40℃ was 26.9% lower than that at -10℃. When the ambient temperature was lower than 15℃, the power generation efficiency of gas turbine increased with the increase of temperature. When the ambient temperature was higher than 15℃, the power generation efficiency of gas turbine decreased with the increase of temperature. The ambient relative humidity had little effect on the gas turbine system in general. With the increase of gas turbine load, the power generation efficiency of gas turbine was significantly increased, and the efficiency of gas turbine at 100% load was 5.7% higher than that at 50% load. The exhaust temperature of gas turbine decreased approximately linearly with the increase of gas turbine load, and when the load was raised to 87.5% and above, the exhaust temperature of gas turbine was stabilized at about 506°C. The HRSG exhaust temperature increased with the increase of gas turbine load, with a minimum of 149°C. When the gas turbine was operated at full load, the heat supply of co-generation system was 25,804 kW. The total thermal efficiency of co-generation system increased with the increase of gas turbine load, and the maximum total thermal efficiency of co-generation system was 87.07% when the gas turbine load reached 87.5%. The study results provided theoretical basis and data support for the optimized operation of the plant and the further energy saving and consumption reduction transformation.

Key words: gas turbine, HRSG, Thermoflow, system design