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本文着重介绍尿素生产用的大型卧式4D22 CO_2压缩机四、五段气缸活塞采用填充聚酰亚胺(PI)作无油润滑元件,实现出口气体的含油量达到0.2～3.8ppm,大大低于CO_2气提法流程所规定的含油量不大于10ppm的指标。活塞元件的使用寿命分别达到2047小时。
This article focuses on urea production with large horizontal 4D22 CO_2 compressor four, five cylinder piston filled with polyimide (PI) for oil-free lubrication components, to achieve export gas oil content of 0.2 ~ 3.8ppm, much lower than CO_2 gas extraction process set forth in the oil content of not more than 10ppm indicators. Piston components of the service life of up to 2047 hours.