电力与能源
電力與能源
전력여능원
Power and Energy
2014年
3期
362-365
,共4页
郦建国%刘含笑%姚宇平%袁伟锋%郭峰%余顺利
酈建國%劉含笑%姚宇平%袁偉鋒%郭峰%餘順利
역건국%류함소%요우평%원위봉%곽봉%여순리
凝聚器%PM2.5%气流分布%湍流强度
凝聚器%PM2.5%氣流分佈%湍流彊度
응취기%PM2.5%기류분포%단류강도
Coagulator%PM2.5%Flow distribution%Turbulence Intensity
电凝聚技术是目前燃煤电厂P M2．5捕集增效的控制技术之一。将凝聚器设在电除尘器进口封头内，可扩大使用范围。参照某135 MW机组布置方式，利用流体动力学软件，构建几何模型并进行网格划分，分析凝聚器在第一层、第二层分布板间对气流的影响，计算进口封头内颗粒运动轨迹及湍流大小。结果表明：在电除尘器进口封头第一层、第二层分布板间设置凝聚器，能满足第一电场入口速度均匀性的要求；在第二层、第三层分布板下端，割掉0．5 m导流板，有利卸灰，但对气流均匀性影响较大；由湍流强度可知，将凝聚器设在第一层分布板前，可使荷电颗粒有更多碰撞、凝聚的概率，从而提高捕集P M2．5能力。
電凝聚技術是目前燃煤電廠P M2．5捕集增效的控製技術之一。將凝聚器設在電除塵器進口封頭內，可擴大使用範圍。參照某135 MW機組佈置方式，利用流體動力學軟件，構建幾何模型併進行網格劃分，分析凝聚器在第一層、第二層分佈闆間對氣流的影響，計算進口封頭內顆粒運動軌跡及湍流大小。結果錶明：在電除塵器進口封頭第一層、第二層分佈闆間設置凝聚器，能滿足第一電場入口速度均勻性的要求；在第二層、第三層分佈闆下耑，割掉0．5 m導流闆，有利卸灰，但對氣流均勻性影響較大；由湍流彊度可知，將凝聚器設在第一層分佈闆前，可使荷電顆粒有更多踫撞、凝聚的概率，從而提高捕集P M2．5能力。
전응취기술시목전연매전엄P M2．5포집증효적공제기술지일。장응취기설재전제진기진구봉두내，가확대사용범위。삼조모135 MW궤조포치방식，이용류체동역학연건，구건궤하모형병진행망격화분，분석응취기재제일층、제이층분포판간대기류적영향，계산진구봉두내과립운동궤적급단류대소。결과표명：재전제진기진구봉두제일층、제이층분포판간설치응취기，능만족제일전장입구속도균균성적요구；재제이층、제삼층분포판하단，할도0．5 m도류판，유리사회，단대기류균균성영향교대；유단류강도가지，장응취기설재제일층분포판전，가사하전과립유경다팽당、응취적개솔，종이제고포집P M2．5능력。
Electro-coagulation technology is one of the main technologies for controlling the PM2 .5 discharged from the coal-fired power plant currently.The application of coagulator can be expanded if set it in the inlet nozzle of electrostatic precipitator.In this paper,reference to the arrangement of a 135 MW unit,geometric model and meshing was done with the use of CFD software,and the effects of velocity distribution with the co-agulator arranged separately in the first and the second distribution plate ,and the particle traj ectories and tur-bulence intensity in the inlet nozzle were calculated.The results show that,it can satisfy the requirement of the velocity uniformity on the first electric field inlet with the coagulator arranged separately in the first and the second distribution plate;Cuting 0.5m guide plate under the bottom floor of second and third distribution board is good for ash removaling,while it is greater influence on the flow uniformity;On the basis of the tur-bulence intensity value,it can make the charged particles have more the probability of collision,condensation, thus improve the ability of PM2.5 capture ,with coalescer is located before the first distribution board.
