四角切圆煤粉炉天然气再燃烧技术的试验研究  

TEST STUDY ON NATURAL GAS REBURNING TECHNOLOGY FOR TANGENTIALLY FIRED PULVERIZED COAL BOILER

作　　者：刘汉周[1] 邹和根 郭涛[1] 卢啸风[1] 王大军[3] 文军[4] 辛明道[1] 

机构地区：[1]重庆大学,重庆400044 [2]中国东方电气集团工程分公司,四川成都610041 [3]四川电力试验研究院,四川成都610072 [4]西安热工研究院有限公司,陕西西安710032

出　　处：《热力发电》2006年第1期37-40,共4页Thermal Power Generation

基　　金：教育部"春晖计划"项目资助(999558)

摘　　要：在一台按1∶12.5比例建造的50MW机组切圆燃烧煤粉锅炉冷模试验台上对煤粉燃烧射流、天然气再燃射流、燃尽风射流的混合特性进行了试验研究,并对射流间的混合特性进行了计算机数值模拟。在此基础上,在四川江油电厂50MW机组的6号炉上首次完成了天然气再燃脱氮的实炉试验。结果表明,利用冷模试验研究与计算模拟的方法对切圆煤粉炉天然气再燃技术进行系统设计合理;在燃用劣质贫煤(热值约17MJ/kg,灰分约41%)的切圆煤粉炉上,采用前后墙对冲喷射天然气及OFA的再燃脱氮技术是可行的。当天然气热值为15.6%时,NOx的降低率为42.7%。The test study on mixing properties of pulverized coal jet flow, the natural gas reburning jet flow, and burnaway air flow has been carried out on a minified (1∶12.5) coldstate simulation test stand of a 50 MW tangentially fired pulverized coal boiler, and the computerized numerical simulation of mixing properties for jet flows being made. On the basis of coldstate test study and numerical simulation, the first industrial test of natural gas reburning (NGR) for denitrification has been completed on real boiler no.6 of 50 MW unit in Jiangyou Power Plant, Sichuan Province. Results show that it is reasonable to apply coldstate test study and computerized numerical simulation ways for designing NGR system, and opposed injecting natural gas jet flow and burnaway air flow on front and rear wall being feasible in a tangential firing pulverized coal boiler for burning inferior coal with low calorific value (about 17 MJ/kg) and high ash content (about 41%). Under condition of natural gas’s heat input to be 15.6%, the reduction rate of NOx to be 42.7%.

关 键 词：50 MW机组锅炉 煤粉炉 四角切圆 氮氧化物 冷模试验 数值模拟 

分 类 号：TK229.63[动力工程及工程热物理—动力机械及工程]