Abstract: As the main fluid mechanical equipment, pump is widely used in chemical industry, pharmaceutical industry, water conservancy, manufacturing and other fields. And the problems occurred in the practical application of pumps have attracted much attention. The key to solve these problems is to analyze the causes of the problems, improve the process conditions and enhance the performance of the equipment. Under the influence of catalysts in the quench water, the quench water pump in the MTO plant has obvious erosion wear. And under the influence of many factors including corrosion and cavitation, such wear has been intensified. So the frequency of equipment failure caused by wear increases, which greatly limits the long period, stable and efficient operation of quench pump. Aiming at the pump wear problem, the main reasons for the wear of quench water pump can be found from analyzing the quench water fluid characteristics, production operation and equipment materials. Corresponding protective measures for each major cause are taken. This can avoid or reduce the wear of the pump effectively. Among the protective measures, improving the characteristics of quench water is the key measure to alleviate the wear; and lifting pump material grade and applying wear-resistant coating materials are optional means to improve the wear resistance performance of the pump.

Key words: quench water pump, catalyst, quench water pump, wear, catalyst, corrosion, wear, protection, corrosion, protection