煤与生物质混烧特性研究

论文总字数：22623字

摘 要

关键词：生物质与煤混燃；污染物排放；积灰结渣

Experimental Study on Co-combustion of Coal with Biomass

03012321 Sun Hao

Supervised by Zhong Zhaoping

Abstract： In the current energy system, renewable energy is playing an increasingly important role. As a part of renewable energy, biomass resources have many advantages compared with other energy sources. There are many ways to utilize biomass resources, and the co-combustion of biomass and coal for electricity generation is a new way of thinking. In this co-combustion process, how to choose the appropriate proportion of biomass and temperature to make the best combustion efficiency and the least pollution emissions rate is an urgent problem to be solved.The above problems have been studied in the experiment. I made the data collection and analysis of the coal combustion and biomass combustion. And I made experiments in different biomass proportions and different temperatures to figure out the best condition which has the minimum pollution emission rate. In addition, I Selected bauxite and quartz sand as the burning bed material to study the influence which the different bed material have on the biomass burning slagging. Through the experiment, it was found that the increase of biomass could promote the release of SO2, and the amount of NO decreased with the increase of the proportion of biomass. The above phenomena may be related to the element contents of biomass and coal. And with the increase of temperature, the released SO2 will increase, and it will result in a decrease in the amount of NO released. Comparing bauxite with quartz sand, high aluminum bauxite is less residue. The reason is that the quartz sand will produce low melting compounds on the surface which will promote slagging.

Key words: co-combustion of coal and biomass；pollutant emission；fouling and slagging

目 录

1绪论……………………………………………………………………………2

1.1 我国的生物质资源…………………………………………………………………………2

1.2 煤和生物质混合燃烧…………………………………………………………………………2

1.3 生物质能的利用转化技术及现状………………………………………………………………………………… 2

1.3.1 燃烧技术 …………………………………………………………………………3

1.3.2 生物质气化技术 …………………………………………………………………………3

1.3.3 生物质液化 …………………………………………………………………………3

1.3.4 生物质热解技术 …………………………………………………………………………4

1.3.5 生物质固化成型技术 …………………………………………………………………………4

1.3.6 生物质发酵技术 …………………………………………………………………………4

1.4 污染物的发生与控制………………………………………………………………………………… 5

1.4.1 氮氧化物的发生与控制 …………………………………………………………………………5

1.4.2 硫氧化物的发生与控制 …………………………………………………………………………6

1.5 研究现状………………………………………………………………………………… 7

2试验部分……………………………………………………………………………9

2.1 试验材料的制备…………………………………………………………………………9

2.2 试验装置与方法…………………………………………………………………………9

3结果与讨论……………………………………………………………………………11

3.1 木屑与煤单独燃烧时污染排放特性研究…………………………………………………………11

3.2 木屑含量对于木屑和煤混合燃烧污染排放特性影响研究…………………………………14

3.3 燃烧温度对于木屑和煤混燃污染排放特性影响研究…………………………………………16

3.4 生物质混煤燃烧与煤、生物质单独燃烧的对比分析……………………………………………19

3.5 不同床料对于煤和生物质混合燃烧粘结特性的影响……………………………………………22

3.5.1 积灰结渣的机理 …………………………………………………………………………22

3.5.2 影响积灰结渣特性的几种重要元素 …………………………………………………………………………22

3.5.3 试验过程及结果分析 …………………………………………………………………………23

4总结……………………………………………………………………………25

致谢……………………………………………………………………………………………26

参考文献………………………………………………………………………………………27

煤与生物质混烧特性研究

1. 绪论

1.1我国的生物质资源

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