摘要
整体煤气化联合循环(integrated gasification combinedcycle,IGCC)发电技术是洁净煤发电新技术的发展方向之一,但煤气化释放出的碱金属蒸气易在对流废锅中形成污垢,而且会引起燃气轮机叶片的高温腐蚀。该文建立了IGCC系统高温合成气中碱金属凝结特性研究试验台,进行IGCC合成气的碱金属凝结特性试验,研究合成气成分、碱金属盐种类对碱金属蒸气凝结特性的影响,得出以下结论:在还原性气氛下碱金属蒸气的凝结温度在620～720℃之间;水蒸气对碱金属蒸气的凝结温度影响不大;随着CO浓度的增加,碱金属蒸气的凝结温度降低;相同的CO浓度下,当Na+、K+的浓度比较小,碱金属盐为氯盐和硫酸盐时的凝结温度要比碱金属盐仅为氯盐时低。
Integrated gasification combined cycle （IGCC） is one of the trends of clean coal power generation technology However, that alkali metal vapors contained in the syngas which are generated from coal gasifier easily deposit on the surfaces of convectional syngas cooler （CSC） will not only lead to slagging, but also will cause high-temperature corrosion of gas turbine blades. An experimental facility was built to study the condensation characteristics of high temperature alkali metals contained in the syngas of the IGCC, and the effects of syngas and alkali metal components on the concretion process were obtained. The results show that the concreted temperature of alkali metal is between 620-720 ℃ in the reductive atmosphere; the steam in the syngas has no effect on this concreted temperature; the higher the concentration of CO in the syngas, the lower the concreted temperature; if the concentration of CO keeps invariable, and the ratio of [Na^＋]/[K^＋] is lower, the concreted temperature is lower when both Cl^- and SO4^2- exists than the case only Cl^- exists.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2010年第11期56-61,共6页
Proceedings of the CSEE
基金
国家高技术研究发展计划项目(863计划)(2007AA-05Z246)~~
关键词
整体煤气化联合循环
煤气化
碱金属
凝结特性
合成气
integrated gasification combined cycle （IGCC） coal gasification
alkali metal
condensation characteristics
syngas
