Pumps in serial connection
AssigneeMMC First Process AS
InventorRoy Steve Glomset
Life of this patent
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Abstract
System for transporting a liquid from a reservoir containing the liquid. The system includes a first and second conduit, each with a lower end and an upper end, a first pump, with an inlet end and an outlet end; wherein one of the lower end of the first conduit or the upper end of the second conduit is connected to a second pump; wherein a height difference between the first and second pump is within a maximum pumping height of a lower pump of the first and second pump. Further, the present invention relates to a method for operating a plurality of pumps in a system.
Claims29
A system for transporting a liquid from a reservoir containing the liquid to a level above a liquid surface in the reservoir, the system comprising:
- an upper coil pump with an inlet end and an outlet end;
- a lower coil pump with an inlet end and an outlet end;
- wherein the inlet end of the upper coil pump is fluidly coupled to the outlet end of the lower coil pump;
- wherein the inlet end of the lower coil pump is fluidly coupled to an outlet from the reservoir;
- wherein the upper coil pump is arranged at a higher level than the lower coil pump;
- wherein the upper coil pump and the lower coil pump rotate independently of each other;
- and
- a control system coupled to a sensor, the sensor monitoring a level of the liquid surface in the reservoir, the control system being coupled to the coil pumps to control activation and deactivation of the coil pumps depending on the liquid level in the reservoir.
A method for operating a plurality of coil pumps coupled in series, the series comprising at least a lower coil pump and an upper coil pump arranged at different levels, where the total lifting height of the series of coil pumps exceeds the lifting height of each coil pump, and the series of coil pumps is coupled to a liquid reservoir, the method comprising:
- activating the upper coil pump of the series of coil pumps when a level of liquid of the reservoir is at or above an inlet end to the upper coil pump;
- activating the lower coil pump of the series of coil pumps, when the liquid level of the reservoir is below the inlet end of the upper coil pump;
- and
- wherein the activation of the pumps involves supplying gas to an inlet end of the lower coil pump.
Dependencies are inferred from the claim text.