渣油加氢循环机蒸汽透平HT102结垢清洗分析  

Analysis of fouling deposit on steam turbine for HT102 recycle hydrogen compressor in hydrodesulfurization unit

作　　者：傅风雷 张磊[1] 原栋文[1] 

机构地区：[1]中国石油化工股份有限公司金陵分公司,江苏省南京市210033

出　　处：《炼油技术与工程》2015年第7期37-41,共5页Petroleum Refinery Engineering

摘　　要：针对中国石油化工股份有限公司金陵分公司1.8 Mt/a渣油加氢装置循环氢压缩机驱动蒸汽透平HT102在压缩机负荷较平稳的情况下存在主汽门逐渐开大、蒸汽耗量不断下降、机组效率降低等问题,分析发现自产的饱和中压蒸汽中Na+含量和Si O2-3含量超标,导致蒸汽品质不合格从而造成透平通流部分结垢。利用饱和湿蒸汽对转子进行在线清洗,投入运行后,透平的轮室压力为2.1 MPa,调节汽阀开度为70%,进汽量为36 t/h,转速为9 150 r/min,运行正常,说明在线清洗效果显著。通过对透平和中压汽包解体检查,并对汽包的旋分头进行焊接加固,回装后汽包运行正常。结果证明使用饱和蒸汽在线清洗和解体清洗透平通流部分两种方案除垢的效果相同。首次尝试在不打开机壳的情况下对转子进行在线清洗,效果好,但须对蒸汽压力、温度进行严格控制。The analysis of gradual opening of interceptor valve and reduced steam consumption and reduced efficiency of compressor train of HT102 steam turbine for the recycle hydrogen compressor in a 1. 8 MM TPY residue hydrodesulfurization unit in SINOPEC Jinling Company has found that the cause is off-specification of Na^＋ and SiO3^2- in saturated medium-pressure steam,which leads to off-specification of steam and fouling in the flow path of steam turbine. After on-line cleaning of rotor with saturated wet steam,the pressure in turbine rotor chamber is 2. 1 MPa,the opening of control valve is 70%,the inlet steam flowrate is 36 t / h and speed of turbine is 9 150 r / min. The normal operation indicates that the on-line cleaning is very effective. The turbine and steam drum are opened for examination and cyclone separator in steam drum is welded,which has ensured the normal operation of steam drum. The operations prove that both on-line cleaning with saturated steam and openup cleaning of steam turbine have the same effect of salt deposit removal. The on-line cleaning of rotor of steam turbine is very successful. Whereas,the steam pressure and temperature have to be strictly controlled.

关 键 词：渣油加氢 蒸汽透平 转子 结垢 湿饱和蒸汽 在线清洗 

分 类 号：TE96[石油与天然气工程—石油机械设备]