On the application of sliding vane pumps in crude oil storage and transportation
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During the storage of crude oil, can a vane pump be used as the bottom oil pump for pumping crude oil out of tanks (also used for transferring oil between tanks)? What impact does the viscosity of crude oil have on the performance of the pump?
Both vane pumps and rotor pumps belong to the category of centrifugal pumps, but vane pumps generate a lot of noise and are prone to cavitation in summer, while rotor pumps can effectively address this issue. It should also be noted that most rotor pumps produced in China still require technical improvements. If available, imported rotor pumps can be used for cleaning silos and transferring liquids between tanks.
Let me correct that. 1. Sliding vane pumps belong to positive displacement pumps, not centrifugal pumps. 2. The self-priming and cavitation resistance of the sliding vane pump are quite good. If it’s used at the bottom of a tank, there’s no problem in terms of cavitation resistance. 3. Since the sliding vane pump features direct contact between the sliding vanes and the pump chamber, it is suitable for oils with a slightly higher viscosity and lubricity, which helps to prevent rapid wear of the sliding vanes.
Both sliding vane pumps and rotary vane pumps are positive displacement pumps, not centrifugal pumps. I suggest using a sliding vane pump instead. The functions of sliding vane pumps and rotary pumps are basically similar, but in actual operation, rotary pumps are more fragile than sliding vane pumps. When used for pumping oil with low levels of purity and many impurities present, rotary pumps are prone to getting stuck, whereas sliding vane pumps perform better than rotary pumps. The amount of maintenance required is less than that of rotary pumps. Our oil depots use copper gear rotor pumps and vane pumps; the gears in the rotor pumps often break, and they are also expensive. We are a refined oil depot.
Agree with what was said on floor 4 – they are all positive displacement pumps! For refined oil, self-priming centrifugal pumps can be used for drawing bottom oil, and they are now widely applied.
Positive displacement pump. There is a problem with using vane pumps in crude oil systems: generally, crude oil is quite dirty, which can cause damage to the vanes.
Sliding vane pumps can definitely be used, but the quality of such pumps available in China seems to be rather poor. If financial conditions permit, it is better to use imported sliding vane pumps, as they are more durable than rotor pumps. If possible, it is recommended to use Blackmer’s products; they have a moderate price and decent quality.
It is recommended not to use a sliding vane pump. In actual operation, the rate at which oil is drawn from the bottom of the tank is relatively slow; therefore, a pump with a high flow rate is not suitable. Since transfer pumps have a high flow rate, it is advised not to use the same pump for this purpose. It would be best to add another small pump to the tank dehydration system as a pump for drawing oil from the bottom. (I have been working in the storage and transportation industry for 11 years, and I encounter such problems frequently.)
Personally, I would recommend using a positive displacement pump; however, it seems that slurry pumps won’t perform very well when used with crude oil! ! ! ! If it is also used for transferring liquids, I wonder whether a screw pump would be more effective! ! ! !