Multistage pump in the transport of crude oil and other high-viscosity media, usually not as good as water and other low-viscosity media as handy, then, when the multistage pump is used to transport high-viscosity liquid, according to our multistage pump manufacturer Changsha Zoomlian pump industry technical experience, summed up may face the following challenges:
1, high starting torque demand: high viscosity liquid will cause the multi-stage pump at the start of the need for greater torque to overcome adhesion and inertia resistance. This may exceed the rated starting capacity of the motor, and it is necessary to consider the use of additional starting devices or the use of gradual acceleration methods to mitigate the impact of starting.
2, the multistage pump internal flow problem: when the high-viscosity liquid flows inside the multi-stage pump, it will lead to greater friction loss and energy loss, which may affect the efficiency of the multi-stage pump. This may require optimization of the pump design, such as increasing internal lubricants or reducing internal friction.
3, overheating and cooling problems: high-viscosity liquids may cause the internal temperature of the multistage pump to increase during operation, which may affect the seal and the life of the multistage pump. Consider strengthening the cooling system or selecting pump materials that can withstand high temperatures.
4, flow instability: high viscosity liquid may cause the pump flow output is unstable, especially in the frequency control. This needs to be designed to take into account the effects of viscosity changes on hydrodynamic performance and may require adjustments to the pump's control system.
Solutions to these challenges include:
5, choose the appropriate multistage pump model and design: Choose a multistage pump specially designed to handle high viscosity liquids, such as a pump with a large internal channel and wear resistant coating.
6, optimize the transmission system of the multistage pump: consider the use of liquid couplings or soft starting devices to start the pump smoothly and reduce the impact of starting.
7, improve the internal cooling system of multistage pump: design an effective pump cooling system to keep the internal temperature of the pump stable and extend the service life of the pump.
8, enhance the material and seal design of the multistage pump: use materials that can withstand high temperature and high viscosity liquids, while optimizing the pump seal system to prevent leakage and energy loss.
9, consider the impact of viscosity on multistage pump performance: When selecting and designing pumps, fully consider the impact of high-viscosity liquids on pump performance, including flow characteristics and energy efficiency, which may require customized pump design and adjustment.
In summary, multistage pumps need to pay special attention to the special needs of start-up, internal flow, temperature control and pump materials when dealing with high-viscosity liquids to ensure their safe and efficient operation.