摘要
利用发动机高温尾气余热加热醇氢动力系统装置,使液态甲醇裂解反应生成甲醇裂解气(一氧化碳+氢气+甲醇蒸汽),替代原机部分燃油实现掺烧。通过试验研究保温型醇氢裂解器较普通式醇氢裂解器换热效果更好、传热速度更快、受热更均匀、裂解效率更高,对保温型醇氢裂解器的排气温度和污染物排放进行了试验验证。研究结果表明,保温型醇氢裂解器不仅能够满足车载裂解器对热量的需求,掺烧比也可以由30%增加到35%,在相同工况下,随着醇氢燃料替代比的增加,一氧化碳(CO)排放降低了3%,总碳氢(THC)排放降低了6%,氮氧化物(NO_(X))排放降低了7%,甲醇、甲醛排放在不安装尾气净化后处理装置情况下也能达到居民空气中有毒物质的排放标准。
The elevated temperature exhaust heat of engine is used to heat the methanol hydrogen power system,it makes the liquid methanol cracking reaction produce methanol cracking gas(carbon monoxide+hydrogen+methanol steam),which can replaces part of the original engine fuel to achieve Blended Combustion.through the experimental research,the heat transfer effect of the heat preservation type methanol hydrogen cracker is higher than that of the common type methanol hydrogen cracker,the heat transfer speed is faster,the heating is more uniform,and the cracking efficiency is higher.the exhaust temperature and pollutant emission of the heat preservation type methanol hydrogen cracker were tested and verified.the results shows that the thermal insulation type methanol hydrogen cracker can not only meet the heat demand of the vehicle cracker,but also increase the blending ratio from 30%to 35%.under the same conditions,with the increase of the replacement ratio of methanol to hydrogen,the emissions of carbon monoxide(CO),total hydrocarbon(THC)and nitrogen oxide(NOx)are reduced by 3%,6%and 7%,respectively.The emissions of methanol and formaldehyde can also meet the emission standards of toxic substances in the air of residents without the installation of tail gas purification after treatment device.
作者
张江华
姜毅
胡青
ZHANG Jiang-hua;JIANG Yi;HU Qing(Nan chang Technology and Science of University,Nanchang 330108,China)
出处
《山东工业技术》
2021年第4期34-42,共9页
Journal of Shandong Industrial Technology
基金
江西省教育厅科学技术研究项目(GJJ202503)
南昌工学院校级课题(NGKJ-20-10)。
关键词
醇氢动力系统
结构优化设计
裂解温度
尾气排放
甲醛排放
methanol hydrogen power system
structural optimization design
pyrolysis temperature
exhaust emission
formaldehyde emission
