摘要：

建立包括分布参数F-T合成反应器模型、考虑燃料气热值的燃气轮机模型及其他能够体现内部关键参数耦合关系的系统级单元子模型，并用于研究集成联产系统的整体热力学性能。首先，对合成气H₂/CO、表观气速对F-T合成反应器合成气转化率和F-T合成尾气组成影响分析，结果表明F-T合成尾气存在CO/H₂提高、CO₂增浓的特点。综合考虑F-T合成反应器合成气转化率和反应器烃产率，推荐适合F-T合成的表观气速范围为0.15～0.40 m

关键词: 煤气化, 费托合成, 联产系统, 热力学性能

Abstract:

Sub-unit models involving Fischer-Tropsch(F-T）synthesis reactor with distributed parameter, gas turbine model considering the fuel gas heating value and other related unit model were established.Based on the models integrated performance of coal gasification co-production system for F-T liquids and electricity was studied.Firstly, impaction of H₂/CO in synthesis gas and superficial velocity on F-T reactor were analyzed, and the results showed that suitable supercritical gas velocity was at 0.15—0.40 m·s^-1, considering the syngas conversion and hydrocarbon productivity of F-T reactor. Secondly, in gas turbine model, the turbine blades height was adjusted to reach mass flow rate match of compressor and turbine when fuel gas changed, and function relationship between cooling air and turbine flow area was established through dimensional analysis method, and then a suitable gas turbine model reflecting the fuel gas composition and heating value was proposed.Finally, coupling F-T reactor model and gas turbine model were built, integrated performance of coal gasification co-production system of F-T liquids and electricity was studied at different H₂/CO, and a co-production system with simple process and thermal performance advantages was recommended.

Key words: 煤气化, 费托合成, 联产系统, 热力学性能