热力发电
熱力髮電
열력발전
THERMAL POWER GENERATION
2014年
9期
71-75
,共5页
烟气%SCR脱硝系统%流场分布%数值模拟%导流板
煙氣%SCR脫硝繫統%流場分佈%數值模擬%導流闆
연기%SCR탈초계통%류장분포%수치모의%도류판
selective catalytic reduction%numerical simulation%guiding plate%flow field distribution
采用CFD软件Fluent对某330 MW机组SCR烟气脱硝系统进行流场数值模拟计算,分析反应器及烟道中导流板的不同布置对流场分布的影响.结果表明：通过在入口烟道采用圆弧过渡转角及6片直形曲板,反应器与混合段水平连接处采用6片折板导流,催化剂入口前采用54片直板等间距布置的优化措施,可显著改善流场均匀性.优化后第1层催化剂截面处速度不均匀值为14．4％,系统压降为134．43 Pa,满足优化要求,有利于脱硝反应和延长催化剂使用寿命.
採用CFD軟件Fluent對某330 MW機組SCR煙氣脫硝繫統進行流場數值模擬計算,分析反應器及煙道中導流闆的不同佈置對流場分佈的影響.結果錶明：通過在入口煙道採用圓弧過渡轉角及6片直形麯闆,反應器與混閤段水平連接處採用6片摺闆導流,催化劑入口前採用54片直闆等間距佈置的優化措施,可顯著改善流場均勻性.優化後第1層催化劑截麵處速度不均勻值為14．4％,繫統壓降為134．43 Pa,滿足優化要求,有利于脫硝反應和延長催化劑使用壽命.
채용CFD연건Fluent대모330 MW궤조SCR연기탈초계통진행류장수치모의계산,분석반응기급연도중도류판적불동포치대류장분포적영향.결과표명：통과재입구연도채용원호과도전각급6편직형곡판,반응기여혼합단수평련접처채용6편절판도류,최화제입구전채용54편직판등간거포치적우화조시,가현저개선류장균균성.우화후제1층최화제절면처속도불균균치위14．4％,계통압강위134．43 Pa,만족우화요구,유리우탈초반응화연장최화제사용수명.
To investigate the effect of arrangement of guiding plates in flue duct on flow field in SCR reac-tors,numerical simulation on a 330 MW unit was performed by applying the Fluent software.The results show that,countermeasures such as employing arc transitional angle and 6 straight curved plates at the flue inlet,using 6 folded plates to guide the flow at joint between the reactor and horizontal part of the mixing section,and applying 54 equal interval straight plates in front of the catalyst entrance can improve uniform-ity of the flow field significantly.The non-uniformity of velocity at cross section of the optimized first cata-lyst layer is 14.4%,and the pressure drop of the system is 134.43 Pa,which satisfies the optimization re-quirements and is beneficial to denitration reaction and prolonging the catalyst's service life.
