热力发电
熱力髮電
열력발전
THERMAL POWER GENERATION
2014年
10期
70-73
,共4页
高建强%王立坤%程少伟%顾兴鹏%薛楠楠
高建彊%王立坤%程少偉%顧興鵬%薛楠楠
고건강%왕립곤%정소위%고흥붕%설남남
锅炉%富氧燃烧%密封系统%漏风系数%烟气成分%CO2 浓度
鍋爐%富氧燃燒%密封繫統%漏風繫數%煙氣成分%CO2 濃度
과로%부양연소%밀봉계통%루풍계수%연기성분%CO2 농도
boiler%oxy-fuel combustion%sealing system%air leakage coefficient%flue gas composition%CO2 concentration
在干烟气再循环方式下,以某超临界600 MW 机组富氧煤粉燃烧锅炉为研究对象,分别对富氧煤粉燃烧锅炉在不同负荷、不同漏风系数的条件下,锅炉烟气成分的变化进行了计算和分析。结果表明：在漏风系数一定的条件下,随负荷的增加 CO2浓度呈上升趋势,N2、O2浓度呈下降趋势；而漏风系数增加时,烟气中各成分的体积分数变化明显。因此,对富氧煤粉燃烧锅炉密封系统的严密性要求高于常规锅炉。
在榦煙氣再循環方式下,以某超臨界600 MW 機組富氧煤粉燃燒鍋爐為研究對象,分彆對富氧煤粉燃燒鍋爐在不同負荷、不同漏風繫數的條件下,鍋爐煙氣成分的變化進行瞭計算和分析。結果錶明：在漏風繫數一定的條件下,隨負荷的增加 CO2濃度呈上升趨勢,N2、O2濃度呈下降趨勢；而漏風繫數增加時,煙氣中各成分的體積分數變化明顯。因此,對富氧煤粉燃燒鍋爐密封繫統的嚴密性要求高于常規鍋爐。
재간연기재순배방식하,이모초림계600 MW 궤조부양매분연소과로위연구대상,분별대부양매분연소과로재불동부하、불동루풍계수적조건하,과로연기성분적변화진행료계산화분석。결과표명：재루풍계수일정적조건하,수부하적증가 CO2농도정상승추세,N2、O2농도정하강추세；이루풍계수증가시,연기중각성분적체적분수변화명현。인차,대부양매분연소과로밀봉계통적엄밀성요구고우상규과로。
In dry flue gas recirculation mode,taking a supercritical 600 MW unit oxygen-enriched pulverized coal-fired boiler as the research object,calculation on fuel combustion was performed to investigate the var-iation of flue gas components under conditions with different loads and air leakage coefficients.The results show that,with a certain air leakage coefficient,the CO2 concentration increased with the unit load,while the N2 and O2 concentration showed an opposite trend.As the air leakage coefficient increased,the volume fraction of each component in flue gas changed obviously,which put forward higher requirements for seal-ing system of the oxygen-enriched coal-fired boilers.
