Oil loading issue
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For loading oil products into vehicles, 10 loading nozzles are installed at the loading platform. Two pumps are placed in the pump room, along with two pipelines – either DN300 or DN400 in diameter – each pipeline being equipped with 4–5 loading nozzles. In my opinion, this setup isn’t very reasonable: first, when different nozzles are used for loading oil at different times, there is significant backflow of fluid. Second, when different grades of the same oil product are available, it’s not possible to load them simultaneously. I think it would be more flexible to use one pump connected to two loading nozzles. Please share your thoughts.
Today, most loading facilities use a single pump connected to a single dip pipe, employing a fixed-volume loading system in which digital control valves regulate the flow rate, ensuring high precision while eliminating the need for return pipelines. It is relatively applicable.
This post was last edited by Oil Transfer Arm on June 9, 2009, at 16:57. I agree with “Beanie Flying Pig’s” opinion: it’s best to carry out the loading operation on a one-to-one basis, as this avoids many troubles. The capacity of the pump should be set to a lower value.
It is best to have one pump corresponding to one dip pipe, which is both convenient and energy-efficient.
This should still be determined based on your company’s market environment. I think the 1-to-2 format you mentioned is quite good.
Typically, design institutes for refineries use this design of one pump with multiple nozzles! ! ! ! In fact, such requirements are quite high for CNC valves; moreover, it’s easy to end up without a backup pump, which is also not conducive to energy savings. . . One pump per crane is a common setup in commercial or operational oil depots; it is cost-effective and practical! ! ! ! I personally recommend one-on-one! ! ! ! ! ! ! !
A single crane with a single pump is better; although it has a higher cost, it is more suitable. Single pumps at multiple crane positions are prone to flow deviation; some crane positions have already been equipped, while others are only half-equipped, making operations more complicated. Especially when loading the last truck, it is necessary to regulate the flow rate; there are safety issues associated with loading light oils in this manner.
One variety is equipped with a corresponding pump and several loading positions, and there are more than one such position – at least two – which helps to increase the loading speed.
In many commodity warehouses, pipeline pumps are installed one-to-one under the crane positions for loading, which is cost-effective and easy to control. However, factors such as terrain and distance must be taken into account; that is, the oil level should be higher than the pump inlet, so that the frictional losses at the inlet are not too significant. A one-on-one format is recommended. If the tank area is too far from the crane position, it needs to be reconsidered.
Since loading is done by vehicle, it is generally not possible to carry out multiple loading operations simultaneously, and using pumps with high flow rates for loading is not appropriate. Generally, pumps with low flow rates are used, in a one-pump-per-hose-type configuration, but the issue of having pumps as backups for each other must be taken into consideration. The pump outlet pipe is DN100 or DN80 (light oil), taking into account the flow velocity at the pipe outlet. The pump inlet pipeline needs to be determined based on the site conditions, with main considerations being friction loss and the saturated vapor pressure of the oil.
I have some ideas; it depends on how you load the equipment. If loading is frequent, similar to the way trains are loaded, a 1-to-many configuration is also feasible, but an inverter is required. Domestic inverters are inexpensive and energy-efficient. For train loading, I designed a 1-to-many setup, while for vehicle loading I designed a 1-to-1 setup