Application of mechanical seals in petrochemical industry

Application of mechanical seals in petrochemical industry 1. Mechanical seals for pumps: The reliability of pumps depends to a large extent on mechanical seals. In petrochemical seal factories and enterprises, most of the fluids handled are flammable and flammable. Once the mechanical seal fails and leaks, it will not only pollute the environment and affect human health, but also cause major accidents such as fire and blasting. We mainly start with the selection of the seal structure of the mechanical seals for petroleum refining pumps under different working conditions to reduce the failure rate of the seal and improve the reliability of the application. 1. Mechanical seals for high temperature hot oil pumps High temperature hot oil pumps mainly include constant bottom pumps, reduced bottom pumps, and catalytic slurry pumps. The mechanical seals of this type of pump are characterized by high temperature (370℃-400℃) and oil viscosity. Large, there are impurities at the bottom of the tower. 2. Mechanical seals for gasoline and diesel pumps The mechanical seals of this type of pump use stop structure (the bellows structure is used for pumps with a temperature higher than 200 ℃). One is to prevent the pump from using a mechanical seal to stop the heat generated by high-speed mixing; the other is to prevent the tension spring from transmitting torque. 4. The mechanical seals for low-temperature light hydrocarbon pumps adopt methods such as adding a non-compensation ring tail length and selecting a secondary back cover structure, and adding the anti-scratch ability of the light hydrocarbon pump mechanical seals. After flushing, the pressure in the seal cavity is increased to prevent the seal from being caused by flicking. The self-flushing method can not only ensure a higher medium pressure in the sealed cavity, prevent the vaporization or gas accumulation of the medium in the sealed cavity, but also take away the conflict heat caused by the conflict pair in time, and effectively control the temperature rise of the sealing end surface and increase it. Liquid phase area to improve the conflict situation. 2. Valves: Valves are an indispensable part of petrochemical refining equipment. They use a large variety and large number of valves. Most of the media in chemical production are corrosive, toxic or flammable and explosive. When the valve leaks, Not only will it cause severe waste of raw materials, energy, and commodities, but it will also have a severe impact on the environment, and even lead to severe safety accidents. Therefore, it is necessary and we should pay attention to the problem of valve leakage in the petrochemical production process. 3. Ordinary seals: With the continuous progress of static sealing technology, rubber seal products and gasket materials and structures have developed greatly, and they are also widely used in various sealing fields, including petrochemical fields. Subordinate industries will also be encouraged, and the prospects for the development of the entire industrial chain are extremely promising. Keywords: seal factory, mechanical seal factory, pump mechanical seal