热力发电2017，Vol.46Issue(7)：5-11,7.DOI:10.3969/j.issn.1002-3364.2017.07.005
电站锅炉烟气余热利用方案优化
Optimization on flue gas waste heat recovery scheme in utility boiler
摘要
Abstract
In order to find out the optimal applicable flue gas waste heat utilization scheme for utility boilers, based on the principle of energy cascade utilization, the waste heat recovery system has been idealized as a heat exchanger network composed of many temperature matching heaters according to the temperature distribution of hot and cold fluids. The optimization variables and constraints have been identified according to the system structure, the conservations of energy and mass. The mathematical optimization mode, that the maximum increase of power generation is the optimization target, has been built. Moreover, the optimization results have been calculated by using the fmincon function. The ideal waste heat recovery scheme for an ultra supercritical 1000 MW unit has been achieved through the optimization model. The maximum increase of power generation of the ideal scheme is 22.34 MW. By reducing the system complexity according to the project engineering needs, the project scheme has been obtained from the ideal scheme. Compared with the pre-existing waste heat recovery schemes, the project scheme is much simpler and more energy efficient, and its net coal consumption dropped by 5.05 g/(kW·h).关键词
余热利用/优化变量/约束条件/优化模型/fmincon函数/能量梯级利用Key words
waste heat recovery/optimization variable/constraint condition/optimization mode/fmincon function/energy cascade utilization分类
能源科技引用本文复制引用
郑莆燕,王乔良,朱群志,郭林彬,王伟..电站锅炉烟气余热利用方案优化[J].热力发电,2017,46(7):5-11,7.基金项目
上海市教委科研创新资助项目(14YZ133) （14YZ133）
上海市科学技术委员会资助项目(15DZ1201804) Supported by:Shanghai Municipal Education Committee (14YZ133) （15DZ1201804）
Science and Technology Commission of Shanghai Municipality (15DZ1201804) （15DZ1201804）
