基于Aspen Plus的生物质颗粒富氧燃烧污染物排放模拟
Pollutant Emission Simulation of Biomass Pellets Oxygen-Enriched Combustion Based on AspenPlus
DOI: 10.12677/SD.2018.83021, PDF,   
作者: 甄子毅：河北工业大学能源与环境工程学院，天津；Imran Ali Shah：河北工业大学国际教育学院，天津
关键词: 富氧燃烧；生物质；NO排放；CO排放；Aspen Plus；Oxy Combustion； Biomass； NO Emission； CO Emission； Aspen Plus
摘要: 为了研究燃烧气氛、进口氧气浓度和过量氧气系数对生物质热水炉富氧燃烧过程中NO，CO排放特性的影响，以生物质颗粒为燃料，在Aspen Plus软件中进行了O2/CO2、O2/N2气氛下不同氧气浓度不同过量氧气系数的生物质燃烧模拟。模拟结果表明，氧气浓度的增加会使O2/N2气氛下NO排放先增加后减少，O2/CO2气氛下NO排放持续升高。而在O2/N2和O2/CO2气氛下，CO的排放都会随着氧气浓度的增高而增高，CO2却会随着氧气浓度的增高而降低。提高过量氧气系数会使NO在两种气氛下的排放有一个先增长后降低的趋势，在1.2左右达到最高。两种气氛下，CO的排放则是随着过量氧气系数的增加而降低。随着氧气浓度的升高O2/N2气氛下CO2占比随着氧气浓度升高而升高，氧气浓度超过50%之后，CO2占比基本不变。而在O2/CO2气氛下却是逐渐降低，且在氧气浓度在21%~50%时，CO2占比下降不明显。而CO2占比对于过量氧气系数的变化并不敏感，只是随着过剩的O2增多而被动下降。
Abstract: This paper is proposed to study the effects of combustion atmosphere, oxygen concentration and excess oxygen coefficient on the NO and CO emission characteristics of a biomass hot water boiler during oxygen-enriched combustion. The simulation on biomass combustion under O2/CO2 and O2/N2 atmospheres was conducted based on Aspen Plus. The increase in oxygen concentration will increase the NO emission in the O2/N2 atmosphere first and then decrease, and the NO emission in the O2/CO2 atmosphere will continue to increase. Under the O2/N2 and O2/CO2 atmospheres, CO emissions increase with the increase of oxygen concentration, and CO2 decreases with the increase of oxygen concentration. Increasing the excess oxygen coefficient causes a trend of NO to increase first and then decrease under the two atmospheres, reaching the maximum around 1.2. In both atmospheres, the CO emissions decrease as the excess oxygen coefficient increases. With the in-crease of oxygen concentration, the proportion of CO2 in the O2/N2 atmosphere increases with the increase of oxygen concentration. After the oxygen concentration exceeds 50%, the CO2 share re-mains basically unchanged. However, under the O2/CO2 atmosphere, it gradually decreased, and when the oxygen concentration was 21%~50%, the CO2 proportion did not decrease significantly. However, the proportion of CO2 is not sensitive to the change of the excess oxygen coefficient, but it only decreases passively as the excess O2 increases.
文章引用：甄子毅, ImranAli Shah. 基于Aspen Plus的生物质颗粒富氧燃烧污染物排放模拟[J]. 可持续发展, 2018, 8(3): 188-198. https://doi.org/10.12677/SD.2018.83021

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