间接空冷机组“三塔合一、四位一体”技术应用研究

Research on the Application of "Three Towers in One, Four in One" Technology of Indirect Air Cooling Unit

针对不同环境风速工况,以660MW超超临界间接空冷机组为例,通过计算流体力学(CFD)模拟软件对"三塔合一、四位一体"系统进行了仿真模拟,分别计算了无除尘装置、卧式低位布置以及立式布置三种方案下10m高度处的水平风速为0m/s、2m/s、5m/s、8m/s、12m/s对空冷塔热力性能的影响。结果表明,随着水平风速的增加,出塔水温呈增加趋势;在TRL工况下,三种方案的水温范围分别为51.7-56.08℃、51.72-55.61℃和51.71-55.6℃。在TMCR工况下,三种方案的水温范围分别为32.77-37.18℃、32.79-36.75℃和32.78-36.69℃。期望为优化间接空冷系统、烟气系统、脱硫系统、湿式除尘系统的布置提供参考。

Against the different wind speed conditions, taking 660 MW ultra-supercritical indirect air cooling unit as an example, the "three towers in one and four in one" system was simulated by computational fluid dynamics(CFD) simulation software. The influences of horizontal wind speeds of 0 m/s, 2 m/s, 5 m/s, 8 m/s and 12 m/s on the thermal performance of the air cooling tower under three schemes of no dust removal device, horizontal low position arrangement and vertical arrangement were calculated respectively. The results show that with the increase of horizontal wind speed, the water temperature in the tower increases. Under TRL conditions, the water temperature ranges of the three schemes are 51.7-56.08℃, 51.72-55.61℃ and 51.71-55.6℃ respectively. Under TMCR conditions, the water temperature ranges of the three schemes are 32.77-37.18℃, 32.79-36.75℃ and 32.78-36.69℃ respectively. It is expected to provide reference for optimizing the arrangement of indirect air cooling system, flue gas system, desulfurization system and wet dust removal system.