凝结水与二次闪蒸汽热能回收利用技术改造

Technical transformation of condensed water and secondary flash steam heat recovery

蒸汽锅炉被购买过热蒸汽经减温减压系统所替代,目前,减温减压工艺利用凝结水回收率≤27%,远低于国家≥60%的回收标准,且富余凝结水与二次闪蒸汽直接排放环境中,造成极大的能源浪费和环境污染。利用热交换技术对凝结水和二次闪蒸利用进行了重新设计,将达到饮用水标准的高温凝结水和高热量二次闪蒸汽,通过"浸入汽水混合器"直接与洗浴水混合换热最大能效的利用热量和水资源。实际应用效果表明,此举措可明显提高凝结水与二次闪蒸汽回收利用率≥78%,节约了蒸汽与自来水量,取得了较大的经济效益和社会效益。

Steam boilers have been replaced by superheated steam purchased through a reduced temperature and pressure system. At present, the recovery rate of condensed water is less than 27%, which is much lower than the national recovery standard of 60%. Moreover, excess condensed water and secondary flash steam are directly discharged into the environment, resulting in great energy waste and environmental pollution. In this paper, the heat exchange technology is used to redesign the use of condensed water and secondary flash. The high-temperature condensed water and high-heat secondary flash steam which meet the drinking water standard are used to make the best use of heat and water resources by directly mixing the "immersed steam-water mixer" with bath water. The practical application results show that this method can obviously improve the recovery efficiency of condensed water and secondary flash steam M 78%, save steam and tap water,and achieve greater economic and social benefits.