关键词: 热等离子体, 煤裂解, 乙炔, 气固混合, 结焦, 反应器模拟, 经济评价

Abstract:

The thermal plasma process for converting coal to acetylene in one-step opens up a direct means for green, clean and efficient utilization of coal, which has potential to substitute the conventional calcium carbide method for acetylene production. Based on the research and development on pilot-scale (ie, 2 MW & 5 MW) plasma reactors for coal pyrolysis, fundamental understanding and state-of-the-art advancement of this process were firstly reviewed. Then some key issues on the reactor design, involving high-efficient gas-solids mixing, coking control and reactor optimization and scale-up were discussed in detail. Furthermore, the process was investigated systematically based on the analyses of materials balance, energy balance and the economic assessment. It is concluded that the optimal utilization of energy and materials flows in the system is of great significance to ensure the economic feasibility.

Key words: 热等离子体, 煤裂解, 乙炔, 气固混合, 结焦, 反应器模拟, 经济评价