燃气轮机进气防冰系统国内外技术对比分析

Contrast and Analysis of the Worldwide Technologies for Gas Turbine Inlet Air Deicing Systems

目前,引进的燃气轮机的进气系统常带有对消音器和进气喇叭口的加热防冰装置,该装置均不能防止高效滤芯在冬季的结冰堵塞,甚至还会严重影响高寒地区燃气轮机在冬季的安全稳定运行。分析了国内外燃机进气防冰技术上的重大差别和某些机组常常发生防冰系统保护性停机的原因,采用国内研制的防冰技术对其进行改造,将加热部位移至滤芯前,起到预防结冰堵塞作用。结果表明,改造后不仅能提高燃机冬季运行的可靠性,而且能节约大量的能源。

At present,the air inlet systems for gas turbines introduced from abroad are often provided with heating and deicing devices for silencers and air inlet bell-mouths. However,such devices are incapable of preventing the high efficiency cartridges from being iced and clogged,even the safe and stable operation of gas turbines in frigid regions in winters are seriously affected and the relevant standards of China are not met. The authors analyzed the major difference in the air inlet deicing technologies for gas turbines in the world and the main causes for protective shutdown of some units often tripped by deicing systems and performed reconstruction of the units by employing the deicing technology developed in domestics. It has been found that the units after the reconstruction can not only enhance the reliability of the operation of the gas turbines in winters but also save a large amount of energy.