燃气热水器燃烧产物中CO和NOx的产生与控制

目的研究燃气热水器燃烧产物中CO和NOx的产生与控制。方法对燃气热水器在冷态开机运行、进风口堵塞(堵塞比例为25%,50%,75%,90%)、长时间耐久燃烧(24 d耐久燃烧实验)以及不同烟道设置(0.5 m 1弯、1 m 1弯、2 m 1弯、2 m 2弯、3 m 1弯、3 m 2弯、3 m 3弯)状况下燃烧产生CO和NOx的浓度进行测定和分析。结果燃气热水器冷态开机运行时存在爆燃现象,瞬时过剩空气系数(α)为1时的CO浓度CO(α=1)]可达约350 mg/m3,NOx浓度NOx(α=1)]随燃烧时间的延长而增大。进风口逐渐堵塞,CO急剧上升,当堵塞到90%时,CO(α=1)浓度高达499.69 mg/m3。人工煤气为气源燃气热水器长时间耐久燃烧24 d后,CO(α=1)浓度高达494.3 mg/m3。烟道设置的长度和弯头越多,燃烧产生CO浓度越高,当烟道设置为3 m 3弯时,CO(α=1)浓度为262.7 mg/m3。结论燃气热水器开机时的爆燃、进风口堵塞、长时间耐久燃烧、烟道长度和弯头数目的增加会导致CO和NOx排放增加。用户应该正确安装、减少开机次数、定期清洁燃气热水器。

Control of Carbon Monoxide and Nitrogen Oxides Produced by Gas Water Heater

Objective To research how to control reduce carbon monoxide and nitrogen oxides produced by gas water heater.Methods Conducting a cold start-up operation,the air inlet was plugged and in the long durability of different settings flue conditions,carbon monoxide and nitrogen oxides were determined.Results There was deflagration phenomenon when gas water heater started at cold boot operation,instantaneous carbon monoxide content was 350 mg/m3,nitrogen oxides increased as combustion time increased.The air inlet...