应用于生活垃圾焚烧炉的炉外再热工艺  

The External Reheating Technology for Domestic Waste Incineration

作　　者：郭昂 GUO Ang(Sanhe SUS Resources Renewable&Energy Co.Ltd.,Langfang Hebei 065200)

机构地区：[1]三河康恒再生能源有限公司,河北廊坊065200

出　　处：《环境卫生工程》2023年第S01期179-182,共4页Environmental Sanitation Engineering

摘　　要：提高焚烧发电热效率是垃圾焚烧行业的重点发展方向之一。目前应用于垃圾焚烧发电厂的炉外再热技术研究主要在于:在提高锅炉蒸汽参数的情况下,如何避免焚烧炉受高温腐蚀限制及减少对汽轮机末级叶片的侵蚀,最终切实大幅度提高发电厂的全厂热效率。介绍了应用于康恒集团三河项目的首台国产化特大型1000t/d垃圾焚烧炉,该项目同时配套了世界首台炉外再热汽轮机高效发电成套装备。其再热系统先是将中压缸排出的不饱和湿蒸汽通过设置在汽水分离再热器底部的除湿器进行除湿,然后利用汽轮机的二段抽汽将不饱和蒸汽加热为过热蒸汽,随后过热蒸汽进入低压缸做功,有效避免了湿蒸汽进入低压缸侵蚀低压末级叶片。该项目采用炉外再热工艺后,其常规热效率由21%~25%提高至31%以上。Improving the thermal efficiency of waste incineration power plants is one of the primary developmental focuses in the waste incineration industry.The research of external reheating technology applied in waste incineration power plants mainly focused on how to avoid high-temperature corrosion on the incinerator and reduce fret of the end-stage blades of the steam turbine while enhancing the steam parameters of the boiler,ultimately significantly improving the overall thermal efficiency of the power plant.The first domestically-produced ultra-large-scale waste incineration furnace with a capacity of 1000 tons per day applied in Sanhe project of SUS had been introduced.The project was also equipped with the world’s first high efficiency power generation equipment of external reheat turbine.The reheating system first dehumidified the unsaturated wet steam discharged from the intermediate pressure cylinder through a dehumidifier located at the bottom of the moisture separator and reheater,and then used the third extraction of the turbine to heat the unsaturated steam until the superheated steam enterd the low-pressure cylinder for work,effectively avoiding the risk of wet steam entering the low-pressure cylinder and eroding the low-pressure final stage blades.The conventional thermal efficiency increased from 21%~25%to more than 31%after the external furnace heating process was adopted in this project.

关 键 词：炉外再热 抽汽 腐蚀 汽水分离再热器 

分 类 号：X799.3[环境科学与工程—环境工程]