在火力发电厂锅炉尾部烟道内增设低压省煤器装置,可将锅炉排烟余热深度提取利用,用来加热锅炉送风机入口风温、加热汽轮机组凝结水、加热城市热网水等。增设低压省煤器装置改造后,可降低机组供电煤耗,达到节能减排的目的。介绍了某热电厂(300MW机组)增设低压省煤器装置的必要性、系统设计改造原则和实际改造方案后的应用效果。通过介绍,更加直观地剖析出火电机组节能改造中锅炉烟气余热利用的效果,对下一步更好地开发烟气利用技术起到指导性的作用。 An additional low-pressure economizer device is installed in the flue of the boiler tail of the thermal power plant to extract and utilize the depth of waste heat from the exhaust of the boiler to heat the temperature of the air inlet of the boiler blower, heat the condensing water of the steam turbine unit and heat the hot water of the city network. Addition of low-pressure economizer device after transformation, can reduce unit coal consumption, to achieve the purpose of energy-saving emission reduction. The necessity of adding a low-pressure economizer device for a 300 MW unit, the principle of system design and reformation, and the application effect after the actual revamping plan are introduced. Through the introduction, more intuitive analysis of the thermal power plant boiler retrofit energy-saving effect of waste heat utilization, the next step to better develop the technology to play a guiding role in flue gas utilization.