Oil Mist Lubrication System In The Application Of 500000 Tons/Year Catalytic Cracking Unit

According to statistics, resulting in rolling bearing overload failure reasons, nearly half are associated with inadequate lubrication. And with the performance of enterprise of machinery and equipment continue to improve, due to improper lubrication and premature bearing damage or other mechanical components will continue to increase, so the choice of high-performance and reasonable lubricating way, is to improve the bearing working environment, reduce the equipment failure, the most effective way to improve the enterprise economic benefits, many petrochemical enterprises urgently the problems need to be solved. Oil mist lubrication technology is a new way to solve this problem. At the same time, because the oil mist lubrication device has the advantages of small volume, light weight, high degree of automation, has the explosion-proof function and alarm system, and can realize remote control and monitoring, to facilitate centralized management, which makes the oil mist lubrication technology has become the effective way for enterprise automation management level and production level of automation greatly improved. As one of the modern petrochemical enterprises, Yanchang Petroleum Group Yongping refinery requirements based on the improvement of the performance of enterprises, constantly improve the level of management and technology, increase the intensity of work in saving production cost. Yong Ping refinery 500000 tons / year catalytic cracking unit was founded in 1997 May, Always use the traditional oil immersed lubrication before 2010, lubricating oil film distribution is not uniform, causing the pump bearing wear; friction generated heat can not easily be taken away, easy to produce the pitting corrosion, reduce the life of the bearing; impurities outside dust and so easy to enter the friction parts, causing the pump bearing wear; in 2008 May, reforming hydrogenation workshop as the pilot took the lead in introducing Beijing lorun technology of oil mist lubrication system, achieved remarkable results in the installation after, to promote the use of machine pumps in 2010 March in the 500000 tons of catalytic cracking unit.Firstly, in this paper, the structure and the function of oil mist lubricating device are introduced, and the atomization mechanism of. The effect of main factors on atomizing effect: the lubricating oil temperature, air temperature, air pressure, air to liquid mass ratio and oil viscosity are analyzed in theory. And get the relation curve between the atomizing quantity and parameters through the pilot data, find out the main parameters influence the effect of atomization and its optimum range.Secondly, the mathematical model of oil mist lubrication is described, and the method of transforming the physical problem into a mathematical model is found. The device group of pump oil consumption to calculate, provides the basis for the selection of equipment. At the same time, the transformation of the centrifugal pump is introduced, and the application conditions of the pure oil mist system and the oil mist system are introduced.In the end, the advantages of the oil mist lubricating device are analyzed, and the economic performance is calculated. Through the oil mist lubrication platform, the relevant data of different machine pump are compared and analyzed, and the advantages of oil mist lubrication in reducing mechanical friction pair, reducing equipment wear and improving the utilization ratio of lubricating oil are verified.