燃气干衣机半预混旋流燃烧器的一氧化碳排放影响分析  

Analysis of Carbon Monoxide Emissions From Semi-Premixed Swirl Burners in Gas Dryers

作　　者：曾吉鹏 潘登[1] 林长津 高乃平[1] ZENG Jipeng;PAN Deng;LIN Changjin;GAO Naiping(School of Mechanical and Energy Engineering,Tongji University,Shanghai 201804,China;Wuxi Little Swan Limited Company,Wuxi 214028,China)

机构地区：[1]同济大学机械与能源工程学院,上海201804 [2]无锡小天鹅股份有限公司,江苏无锡214028

出　　处：《华侨大学学报（自然科学版）》2020年第2期142-149,共8页Journal of Huaqiao University(Natural Science)

摘　　要：设计一款以丙烷为燃料,适用于燃气干衣机的半预混旋流燃烧器.采用实验测量与数值模拟的方法,研究不同燃气流量和挡环高度对其CO排放的影响.研究表明:在工况中,燃气流量增加使一次空气系数下降,CO生成速率上升,故增加燃气流量后CO浓度升高;挡环主要影响燃烧器头部周围二次空气流场和火焰温度场,增加挡环高度后燃气空气混合程度上升,烟气温度升高;当燃气流量为0.207 m3·h^-1,挡环高度分别为3,11,16 mm时,CO的实测体积比折算值分别为319,242,199 cm3·m^-3,因此,增加挡环高度后CO减排效果明显.模拟结果显示:当燃烧器挡环高度为20 mm时,CO的排放量最低.A semi-premixed vortex burner for gas dryer was designed with propane as fuel.The effects of power and retaining ring height on carbon monoxide emission were studied by methods of experimental measurement and numerical simulation.The research shows that with the increase of gas flow rate,the primary air coefficient decreases and the rate of CO formation increases,so the CO concentration increases with the increase of gas flow rate.The retaining ring mainly affects the secondary air and temperature around the burner head.With the increase of the height of the retaining ring,the gas-air mixing degree and the temperature increase.When the height of retaining ring is 3,11,and 16 mm respectively,under the condition of 0.207 m3·h^-1 burner gas flow rate,the measured CO concentration are 319,242,and 199 cm3·m^-3 accordingly.So,the effect of CO emission reduction is obvious when the height of retaining ring is increased.The simulation results show that when the height of burner retaining ring is 20 mm,the CO concentration is the lowest.

关 键 词：旋流燃烧器 一氧化碳 燃气干衣机 丙烷 数值模拟 

分 类 号：TK174[动力工程及工程热物理—热能工程]