CENTAC压缩机效率分析及修复对策

Efficiency analysis and reparation for CENTAC air compressors

CENTAC空气压缩机的主要作用是为氧化反应器提供反应所需要的氧气,该压缩机长期在PTA装置环境下(酸性、粉尘)运行,空压机的叶轮、扩压器以及叶轮背板被腐蚀及冲刷磨损严重,导致这些过流部件使用寿命较短,压缩机的效率下降严重,仅为原设计能力的70%左右。笔者分析PTA装置空压机的各项故障及设备效率严重降低的原因,对比了原有空压机的设计思想、依据及标准等,找出其优点和不足,针对PTA空压机原有设计所存在的缺陷,通过新技术、新材料进行修复解决,实现空压机的长周期稳定运行。

The CENTAC air compressor was used to provide oxygen for the oxidation reactor. In PTA devices,the compressors had to work for a long term in an environment with acid gas and dust,leading to both serious corrosion of diffuser pressure devices and erosion wear of impeller backplanes,which made a short life and a serious efficiency decline for the compressor with only about 70% of its original design capacity. With a better understanding of the original air compressor design ideas,basis and standards,etc,causes of troubles and factors of efficiency decline were discussed for the compressors in PTA devices,and new technology and novel materials were used for compressor reparation to realize its long- term- stable operation.