论文部分内容阅读
尿素合成塔出口压力调节阀 (俗称Ｐ4阀 )是尿素装置中最为主要的调节阀之一。由于工艺介质的特殊性 ,该调节阀不设副线 ,而且该阀前后压差大 ,阀芯冲刷严重 ,因此使用寿命较短 ,故障率较高。一旦出现故障 ,通常要停车处理 ,经济损失严重。我厂投产初期曾 2次因该阀故障造成停车
Urea synthesis tower outlet pressure regulating valve (commonly known as the P4 valve) is one of the most important regulating valve in urea plant. Due to the particularity of the process medium, the control valve does not set a secondary line, and the pressure difference before and after the valve, the spool flushing serious, so the service life is shorter, the failure rate is higher. In the event of failure, it is usually stopped and dealt with with serious economic losses. I plant put into operation early 2 times because of the valve failure caused by parking