CAJ | 학술논문

某电厂600 MW机组用KWPKC 600-800型离心式脱硫浆液循环泵为锥形密封口环，在运行过程中出现较为剧烈且规律性的振动，影响了脱硫系统的正常运行。为此，运用CFD分析法计算得出泵内两相流流场的速度分布及压力分布，并对叶轮口环进行了加装挡流平台和改变密封流道的改造。改造后，对口环间隙分别为3、6 mm的泵内流场进行数值模拟。结果表明，改造后泄流对入口流道处所形成的高压屏障处压力有所减小，噪声、振动明显减弱。
모전엄600 MW궤조용KWPKC 600-800형리심식탈류장액순배빙위추형밀봉구배，재운행과정중출현교위극렬차규률성적진동，영향료탈류계통적정상운행。위차，운용CFD분석법계산득출빙내량상류류장적속도분포급압력분포，병대협륜구배진행료가장당류평태화개변밀봉류도적개조。개조후，대구배간극분별위3、6 mm적빙내류장진행수치모의。결과표명，개조후설류대입구류도처소형성적고압병장처압력유소감소，조성、진동명현감약。
The 600-800 type centrifugal desulfurization slurry cycling pump in a 600 MW unit applies conical sealing rings,which had intense and regular vibrations during work,affecting normal operation of the des-ulfurization system.Therefore,the CFD software was adopted to simulate the velocity distribution and pressure distribution of the two-phase flow in the pumps.Moreover,the impeller wearing ring was retrofit-ted by installing a buffle plat.After the transformation,numerical simulation on flow field inside the pump was carried out,with the ring gap of 3 mm and 6 mm,respectively.The results show that,the vibration of the slurry pump operation reduced dramatically.