氧碳原子比和水煤浆质量分数对水煤浆气化影响的数值模拟
-
摘要: 用数值方法模拟了水煤浆气化过程中氧碳原子比和水煤浆质量分数对气化过程和出口煤气成分以及碳转化率的影响规律。总结了在具有复杂化学反应的高温、高压容器中，对水煤浆气化过程的数值模拟时经常遇到的问题和解决方法。得到了气化炉内的温度场、流场、浓度场以及出口粗煤气成分，其结果与工程实际相比非常接近；并利用得到的结果分析了影响水煤浆气化过程和出口煤气成分的主要因素：氧碳原子比、水煤浆质量分数等，提出了提高出口煤气有效成分（CO+H2）的方法。Abstract: The simulation analysis on the effects of O/C ratio and coal concentration in the coal-water-slurry (CWS) on the flow and temperature fields of gasifier, gas composition and carbon conversion in the CWS gasification was conducted. The questions and resolving methods which are often met with the simulation of CWS gasification process at a high temperature and a high pressure with complex chemical reactions were discussed. The temperature, velocity and concentration fields in the gasifier as well as coal gas composition were predicated. The predicated results were very close to the engineering data. Furthermore, the effects of O/C molar ratio and coal concentration in CWS on the CWS gasification process and coal gas composition were analyzed and the measures to increase the effective coal gas components (CO+H2) were proposed.
-
Key words:
- coal-water-slurry /
- gasification /
- oxygen-coal molar ratio /
- numerical simulation
-
点击查看大图
计量
- 文章访问数: 1775
- HTML全文浏览量: 27
- PDF下载量: 524
- 被引次数: 0
下载:
