辐射废锅内高温高压合成气的辐射特性  

Radiation characteristics of syngas in radiation waste heat boiler at high temperature and high pressure

作　　者：赵加佩[1] 周昊[1] 岑可法[1] 

机构地区：[1]浙江大学能源清洁利用国家重点实验室,浙江大学热能工程研究所,浙江杭州310027

出　　处：《浙江大学学报（工学版）》2010年第9期1781-1786,共6页Journal of Zhejiang University：Engineering Science

基　　金：国家“973”重点基础研究发展规划资助项目(2009CB219802);浙江省自然科学基金资助项目(R107532);新世纪优秀人才支持计划资助项目(NCET-07-0761);全国优秀博士学位论文作者专项资金资助项目(200747);浙江大学曹光彪高科技发展基金资助项目(2008RC001);中央高校基本科研业务费专项资金资助项目.

摘　　要：以Edwards的指数宽带模型为基准,研究了含一氧化碳、二氧化碳和水蒸气的整体煤气化联合循环系统(IGCC)气化炉出口合成气在高温高压环境下的辐射特性,计算出了混合物在不同气体温度、压力、壁面温度和射线行程长度下的总吸收比和总发射率,并将低压下的值与Hottel线算图进行了对比,对比结果良好.针对一工程实际IGCC(压力3.5MPa、平均温度约1300K)辐射余热锅炉,选用了合理的辐射与对流换热模型,将指数宽带模型应用于炉内换热计算,结果显示:辐射换热是炉内主要换热方式,辐射换热可达总换热量的70%左右,炉膛出口烟温计算值与现场值符合较好.The exponential wide-band model （EWBM） Proposed by Edwards was used to investigate the radiation characteristics of the gas mixture of carbon monoxide, carbon dioxide and water vapor at high temperature and high pressure. Total absorptivit and total emissivit of the syngas mixtures at different temperatures, pressures, wall temperatures and beam lengths were accordingly calculated. The total absorp- tivity and total emissivity at low pressures calculated according to EWBM were compared with those given by the Hottel chart,which showed good agreement. An engineering example of an integrated gasification combined cycles （IGCC） radiation waste heat boiler （RWHB） at 3. 5 MPa and the mean temperature of 1 300 K was presented. In an attempt to calculate the heat transfer in the RWHB, appropriate radiative and convective heat transfer models were therefore selected. Results indicated that radiative heat transfer was the primary heat transfer mode in the RWHB, and the amount of radiative heat transfer accounted for as much as 70 % of the total amount. Furthermore, the calculated value of boiler outlet temperature also yielded good agreement with the field data.

关 键 词：辐射废锅 合成气 辐射特性 指数宽带模型 换热计算 

分 类 号：TK121[动力工程及工程热物理—工程热物理]