【作者】 刘强；

【导师】 潘伟平；

【作者基本信息】 华北电力大学 ， 动力工程， 2014， 硕士

【摘要】 我国的基本能源结构为富煤、缺油、少气,我国的能源发展主要依靠煤炭资源的大量使用。近三十年来,随着我国经济的发展,煤炭资源逐渐匮乏,直接燃烧煤炭造成的环境污染也日趋严重；我国是农业大国,生物质能源丰富,如果对生物质资源合理利用将可以减少对化石能源的依赖。将生物质和煤炭联合使用是一种既符合我国基本国情,又可以解决我国能源短缺的一种有效途径。生物质和煤共气化是一种典型的联合使用方式,这不仅使煤和生物质的物理化学性质得到了互补,而且产生了清洁高效的二次能源。这对提高生物质的利用品味、丰富完善煤炭的气化技术有着积极的意义。气化过程是由热解过程和焦气化过程组成。本文选取了2011年神华集团的神华煤和2011年贵州烟草公司的烟梗作为实验样品,研究了升温速率、载气流量、碱金属元素对神华煤气化反应的影响,并以不同比例的烟梗和神华煤进行混合进行气化实验,探求生物质和神华煤的最佳混合比例。在实验过程中使用了热重-红外-质谱联用来进行辅佐验证。论文工作的主要进展如下：(1)升温速率影响了煤炭气化的转化程度和转化方式,升温速率越快,相同温度下转化率越低；(2)气流量影响了煤炭气化过程中的气化反应和煤炭中的碳酸盐的分解反应；(3)碱金属对神华煤的气化具有促进作用,这也是生物质和神华煤混合方式气化对完善煤炭气化技术提供了理论依据；(4)在以10%、20%、30%、40%、50%为比例混合的生物质和神华煤混合物中,20%在几种混合比例中经济性最好。更多还原

【Abstract】 There are abundant coals, absent petroleum and lean natural gases in China. China’s energy development mainly relies on the extensive use of coal resources. Nearly30years, with the development of China, coal resource is scarcity gradually and serious environmental pollution is caused by burning. Biomass is renewable and abundant in China. It is very important way to solve the energy shortage that biomass is used effectively. There is a way to solve the shortage energy problem that jointing use of biomass and coal. Co-gasification of biomass and coal not only make the complementary nature of the two, but also get clean energy, which is a positive meaning on improving the utilization of biomass taste and riching sound of coal gasification technology.Gasification process can be divided into the pyrolysis process and gasification process. Shenhua bituminous coal and tobacco stems from Guizhou scrap tobacco companies are chosen to carry the experiment. Carrier gas flow rate, alkali metal elements have been studied to find the differences among these reactions. In order to examine kinetics properties of the different proportion of coal gasification, the Shenhua coal and tobacco stems are mixed with different ratios to carry the gasification experiments. The Shenhua coal with Chinese tobacco stems are studied using simultaneous SDT-MS-FTIR technique. The experimental results show that:(1) Heating rate affects the degree of conversion of coal gasification and conversion method, the faster heating rate is, the lower the conversion rate;(2) Gas flow rate influences on the gasification reaction and carbonate decomposition;(3) The alkali metals in the tobacco stems play an important role in the co-gasification of coal and tobacco stems;(4) In10%,20%,30%,40%,50%for the proportion of mixed biomass and Shenhua coal mixture, mixing ratio of20%is the best.更多还原