北京某燃气热电厂余热回收系统设计

作者：颜龙飞王维宋宝同胡洋张翠婷杜志环刘满园

单位：北京电力经济技术研究院有限公司

摘要：通过对北京某燃气热电厂余热资源进行计算分析，提出了循环冷却水和烟气余热回收用于集中供热的方案。根据电厂汽轮机抽汽量，冷却水余热和烟气余热均采用了水源热泵+热网加热器的方式进行回收，解决了传统余热回收方式汽轮机抽汽的同时进行烟气余热与循环冷却水余热回收蒸汽量不足的问题。从综合供热成本分析可知，水源热泵回收方式低于吸收式热泵方式，使用水源热泵进行余热回收具有较好的经济性。

关键词：余热回收电厂冷却水余热烟气余热水源热泵吸收式热泵

作者简介：颜龙飞,男,1988年生,硕士研究生,工程师100029北京市朝阳区安立路248号北京电力经济技术研究院设计中心，E-mail:315230892@qq.com;

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Design of waste heat recovery system for a gas-fired thermal power plant in Beijing

Yan Longfei Wang Wei Song Baotong Hu Yang Zhang Cuiting Du Zhihuan Liu Manyuan

(Beijing Electric Company Research Institute Co., Ltd.)

Abstract: Based on the calculation and analysis of the waste heat resources of a gas-fired thermal power plant in Beijing, this paper proposes a scheme of circulating cooling water and flue gas waste heat recovery for central heating. According to the steam extraction capacity of the steam turbine in the power plant, the waste heat of cooling water and flue gas is recovered by the way of water-source heat pump plus heating network heater, which solves the problem that the steam extraction capacity of the steam turbine in the traditional waste heat recovery method is insufficient for the flue gas waste heat recovery and the circulating cooling water waste heat recovery at the same time. From the comprehensive heating cost analysis, it can be seen that the recovery method of the water-source heat pump is lower than that of the absorption heat pump, and the use of water-source heat pump for waste heat recovery has better economy.

Keywords: waste heat recovery; power plant; cooling water waste heat; flue gas waste heat; water-source heat pump; absorption heat pump;

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