CAJ | 학술논문

以某600 MW煤粉锅炉为例,进行了微富氧燃烧方式下锅炉的结构概念设计及受热面优化,并和空气燃烧、纯氧燃烧模式下的特性参数进行了比较.结果表明：与空气燃烧及纯氧燃烧相比,微富氧燃烧模式下单位时间炉膛内烟气量减少,理论燃烧温度升高,辐射换热加强;烟气与工质的辐射换热量及对流换热量与前两者相比均有很大不同,因此需要对其烟气、工质两侧的能量分布进行重新匹配;优化设计后微富氧燃烧锅炉本体尺寸减小,受热面的布置也发生了很大改变,总受热面面积比空气燃烧时减少了46.5%.
이모600 MW매분과로위례,진행료미부양연소방식하과로적결구개념설계급수열면우화,병화공기연소、순양연소모식하적특성삼수진행료비교.결과표명：여공기연소급순양연소상비,미부양연소모식하단위시간로당내연기량감소,이론연소온도승고,복사환열가강;연기여공질적복사환열량급대류환열량여전량자상비균유흔대불동,인차수요대기연기、공질량측적능량분포진행중신필배;우화설계후미부양연소과로본체척촌감소,수열면적포치야발생료흔대개변,총수열면면적비공기연소시감소료46.5%.
Taking a 600 MW pulverized coal-fired boiler as an example,the concept design of boiler structure and the heat surface optimization were carried out at the mode of air enrichment combustion,after which the characteristic parameters were compared with those obtained at air or pure oxygen combustion mode.Results show that compared with air or pure oxygen combustion mode,the air enrichment combustion produces less flue gas,higher theoretical combustion temperature and greater radiation intensity in the furnace,and both the radiant and convective heat transfer differ a lot between flue gas and steam,so the energy distributio on both sides of flue gas and steam needs to be re-arranged.The size of the air enrichment combustion boiler has been reduced after optimization,while its heat surface arrangement changed with a reduction of total heat surface area by 46.5%,compared with air combustion mode.