锅炉启动排汽回收技术构建和应用

Build and Application of Start-up Exhaust Steam Recovery Technology for Boilers

热电厂常采用的单母管制系统在锅炉升停炉时会产生蒸汽浪费和排汽噪音污染。基于对某热电厂的调研与分析,结合物质平衡、热平衡等理论公式,提出减温减压器和管道选型方案。开展项目设计与施工,在原有蒸汽管道基础上新增启动排汽回收管道,每次升停炉可回收蒸汽约95 t,噪音测量值降低至45 dB左右,满足国家标准55 dB的要求。锅炉启动排汽回收技术减少了能源浪费,节约了投资成本,静态投资回收期仅为2.14年,对同行业在锅炉节能降噪方面起到了示范作用。

The single-bus control system often used in the thermal power plant will produce steam waste and exhaust noise pollution when the boiler is on and off.Based on the investigation and analysis of a thermal power plant,combined with the theoretical formulas such as material balance and heat balance,the selection scheme of temperature and pressure reducer and pipeline is put forward.The project design and construction are carried out.On the basis of the original steam pipe,a new exhaust steam recovery pipe is added.The steam can be recovered about 95 t each time when the boiler is on and off,and the noise measurement value is reduced to about 45 dB,which meets the requirement of the national standard of 55 dB.The technology reduces energy waste and investment cost,its static investment recovery period is only 2.14 years,playing an exemplary role in the energy saving and noise reduction of boilers.