催化燃烧中生物质与催化剂混合流化行为
Mixing fluidization behaviors of biomass and catalyst in catalytic combustion
王家兴 1王敏 2郭石开 3解冠宇 3丁芸 3张志鹏2
作者信息
- 1. Yantai Longyuan Power Technology Co.,Ltd.,Yantai 264006,Shandong,China
- 2. 烟台龙源电力技术股份有限公司,山东烟台 264006
- 3. 内蒙古京海煤矸石发电有限责任公司,内蒙古乌海 016000
- 折叠
摘要
新能源利用在减少碳排放中扮演着重要的角色,生物质能的利用与转化已经成为其中重要的一环,生物质催化燃烧可以很好地降低着火点,促进燃烧效率,为改进生物质直燃提供了新的思路.针对生物质催化燃烧反应器,以秸秆生物质作为燃料,利用离散单元模型,探究秸秆生物质燃料与催化颗粒间的混合流化行为,分析生物质长径比对颗料混合行为的影响机制.结果表明,在气泡周围生物质与催化颗粒的混合程度较大.在床中心区域,气固相间作用力对颗粒混合行为的影响增强.随着生物质长径比的增大,床层中颗粒混合程度减弱,非均匀分布增强.本研究为流化床生物质催化燃烧的过程调控提供了理论依据.
Abstract
The utilization of new energy plays an important role in reducing carbon emission.The biomass conversion has become a key issue.Biomass catalytic combustion can effectively reduce ignition points,promote combustion efficiency,which provides a new idea for improving biomass direct combustion.This article focuses on the biomass catalytic combustion process in a fluidized bed reactor.Taking straw fuel as an example,a discrete element method is implemented to explore the fluidization behavior between straw fuel and catalyst particle with different aspect ratios.The influence of biomass aspect ratio on the mixing behavior of particle is analyzed.The results reveal that the mixing degree between biomass and catalyst particles around the bubbles is relatively high.In the central region of the bed,the influence of gas-solid interaction forces on particle mixing behaviors is enhanced.As the aspect ratio of biomass particles increases,the degree of particle mixing in the bed decreases and the non-uniform distribution increases.This study provides a theoretical basis for the process control of fluidized bed biomass catalytic combustion.
关键词
能源化学/秸秆/生物质/流化床/催化燃烧/长径比Key words
energy chemistry/straw/biomass/fluidized bed/catalytic combustion/aspect ratio引用本文复制引用
出版年
2024
NETL
NSTL
万方数据