IGCC气化炉水循环计算与分析

以某整体煤气化联合循环（IGCC）气化炉为例，通过建立控制循环水系统数学模型进行了计算和分析，解：央复杂结构IGCC气化炉水系统流量、热量分配和阻力平衡问题．结果表明：高循环倍率使足够的循环水量流过受热面，能确保受热面不发生传热恶化；气化炉上段三组水冷壁管组在目标流量下压降很大，若优化布置结构、简化汽水流程，并尽量避免汽水混合物沿受热管道向下流动，则能有效提高效率、降低成本．

Calculation and Analysis of the Water Cycle System for IGCC Gasifiers

Taking the gasifier in an integrated gasification combined cycle （IGCC） unit as an example, calculation and analysis were carried out based on newly built mathematical models, so as to balance the water flow, heat distribution and pressure distribution in the water cycle system of complicatedly structured IGCC gasifiers. Results show that high rates of water circulation enable sufficient water to flow through the heat surfaces, among which heat-transfer deterioration is avoided. The high pressure drop, occurring in the three tube banks on upper part of the gasifier at target flow, may be reduced by optimizing the structural arrangement, simplifying the steam-water flow path and preventing the steam-water mixture from flowing downward along the tubes, and accordingly the unit efficiency is raised and the operation cost is reduced.