摘要
为解决燃煤机组空气预热器(简称空预器)堵塞、烟道腐蚀、硫酸氢铵粘结除尘设备、烟囱蓝羽等问题,应对未来严格的SO_3排放标准,研究了碱性吸附剂脱除SO_3技术。对比了碱性吸附剂干粉注射系统与浆液注射系统的技术特征;研究了不同碱性吸附剂的适用范围及其在中国的资源储量和价格;以燃煤硫分1%的600 MW机组为例,分析了吸附剂注射系统的技术经济性。结果表明:碱性吸附剂注射技术是解决SO_3污染及相关问题的有效方法;不同吸附剂在适合的位置注射均能满足SO_3脱除率的要求,注射位置和经济性是影响技术路线确定的关键;浆液注射系统年运行费用约为干粉注射系统的2.9倍;在中国应用的干粉注射系统推荐采用Ca(OH)_2或MgO等吸附剂,Ca(OH)2注射位置可选择空预器进出口,MgO注射位置以SCR装置进出口为主。
In order to solve the problems of air heater fouling,duct corrosion,ammonium bisulfate adhering to ESP and plume opacity to meet the strict SO3 emission standards in the future,tbe SO3 removal technology with alkaline sorbent is studied in this paper.The technical characteristics of the dry sorbent injection are compared with those of the slurry injection.In addition,the applicable scope of different alkaline sorbents is studied,and the reserves and prices of the mineral resources in China are also investigated.Then the technical and economic characteristics of the sorbent injection system are analyzed on a 600 MW coal-fired unit that fires the coal with 1% sulfur content.The results show that the technology of alkaline sorbent injection is an effective way to solve SO3 pollution and related issues.All sorbents injected in suitable positions can meet the requirements of SO3 removal efficiency.The injecting location and the economy are vital for determining the technical route.The operation cost of the slurry injection system is about 2.9 times of that of the dry sorbent injection system in China.The dry sorbents such as Ca（OH）2 and MgO are recommended,Ca（OH）2 is better to be injected at the inlet or oudet of the air heater and MgO to be injected at the SCR inlet or outlet.
出处
《中国电力》
CSCD
北大核心
2017年第7期102-108,共7页
Electric Power
基金
中国大唐集团公司技术改造专项(DTJG2015-GJ088)~~
