Experiment study on pyrolysis of Huolinhe lignite with solid heat carrier
-
摘要: 在处理量为10kg/h的粉煤-固体热载体移动床实验装置上，以循环灰为热载体对其进行了热解特性评价实验。考察了热解温度（460℃~610℃）、反应时间（6min~8min）及煤粒粒径对热解产物产率和组成的影响。结果表明，随着热解温度的升高，气体产率增大；焦油产率在520℃时达到最大值4.94%。热解煤气的热值为19.80MJ/m3~23.20MJ/m3。与淮南烟煤相比，热解焦油中BTX、PCX的含量较高，特别是PCX的含量在反应温度为610℃时达到23.82%。热解半焦具有很好的燃烧特性而且硫含量明显低于原煤，有利于减轻循环流化床锅炉的脱硫负荷。Abstract: Pyrolysis of Huolinhe lignite with solid heat carrier was carried out in a moving bed reactor with the capacity of 10kg/h. The solid heat carrier used in the experiment was the circulating ash from a 75t/h CFB boiler. The effects of pyrolysis temperature, residence time and coal particle size on the yields and composition of products were studied. It is found that the gas yield increases with the increasing pyrolysis temperature. The yield of tar reaches a maximum of 4.94% at 520℃. The heating value of pyrolysis gas is from 19.80MJ/m3 to 23.20MJ/m3. Some useful compounds, such as BTX and PCX, could be obtained from pyrolysis tar and the contents of them are much higher than those from a bituminous pyrolysis tar. Moreover, the pyrolysis char exhibits good combustion characteristic. The sulfur content of pyrolysis char is notably lower than that in raw coal, which benefits to reduce the desulphurization burden of the CFB boiler.
-
Key words:
- solid heat carrier /
- lignite /
- pyrolysis
-
点击查看大图
计量
- 文章访问数: 2162
- HTML全文浏览量: 24
- PDF下载量: 946
- 被引次数: 0
下载:
