典型富氧燃烧锅炉风烟系统稳态过程分析  

Analysis on Steady-state Process of Air/Gas System for a Typical Oxy-fuel Combustion Boiler

作　　者：黄勇理[1] 刘杰[1] 任健[1] 柳朝晖[1] 郑楚光[1] 

机构地区：[1]华中科技大学能源与动力工程学院,煤燃烧国家重点实验室,武汉430074

出　　处：《动力工程学报》2016年第11期862-869,882,共9页Journal of Chinese Society of Power Engineering

基　　金：国家重点基础研究发展计划(973计划)资助项目(2011CB707300);国家科技支撑计划资助项目(2011BAC0500);湖北省科技厅资助项目(2015ACA051)

摘　　要：以典型富氧燃烧锅炉风烟燃烧稳态模型为基础,对35MW富氧燃烧系统稳态运行工况下的风烟燃烧过程数据进行仿真,并对系统运行中涉及的配风、注氧、漏风控制和CO_2捕集工艺优化等主要问题进行详细分析,提出了改进运行特性和工艺参数的调节手段.结果表明:系统漏风率限制在3.6%以下时,干循环烟气理论上可获得80%以上的CO_2体积分数;高效的烟气水分脱除有利于系统运行和循环烟气中CO_2的捕集;不同的供氧配风方式将会造成燃烧优化、系统安全和控制调节的性能差异.Based on the steady-state model for air/gas combustion system of typical oxy-fuel combustion boilers, running data of the system in a 35 MW oxy-fuel combustion boiler were numerically simulated, with following problems involved in the operation process analyzed in detail, such as the air/gas distribu- tion, oxygen injection, air leakage control and the optimization of CO2 capture and storage, etc. , after which corresponding suggestions were proposed for improvement of relevant operation characteristics and process parameters. Results show that when the air leakage ratio is controlled below 3.6%, the CO2 con- centration can theoretically achieve 80% in dry flue gas recirculation mode. Efficient removal of flue gas moisture is beneficial to both the system operation and the CO2 capture from the gas circulation. Different oxygen distribution modes will bring different results in combustion optimization, system safety and con- trol adjustment.

关 键 词：富氧燃烧锅炉 CO2富集 运行优化 烟气组分 漏风 

分 类 号：TK223[动力工程及工程热物理—动力机械及工程]