US 8,025,157 B2 · Power recovery system

Abstract

A power recovery system is used for reducing the total energy consumption in a process such as an industrial treating process or a fluid refining process including the delivery of a fluid under a high pressure. The power recovery system includes a high-pressure pump for pressuring raw water, a reverse osmosis membrane cartridge for treating high-pressure water discharged from the high-pressure pump with a reverse osmosis membrane to produce treated water, a positive-displacement piston pump for pressuring raw water under the pressure of concentrated water which is discharged from the reverse osmosis membrane cartridge without being treated by the reverse osmosis membrane, and a power recovery pump turbine for boosting the pressurized raw water discharged from the positive-displacement piston pump and adding the boosted water to the high-pressure water discharged from the high-pressure pump. The power recovery pump turbine is actuated by pressurized water generated in the power recovery system.

Claims30

Dependent claims

A power recovery system comprising:

a high-pressure pump for pressuring raw water;
a reverse osmosis membrane cartridge for treating high-pressure water discharged from said high-pressure pump with a reverse osmosis membrane to produce treated water;
a positive-displacement piston pump for pressuring raw water under the pressure of concentrated water which is discharged from said reverse osmosis membrane cartridge without being treated by said reverse osmosis membrane;
and
a pump turbine comprising a turbine and a booster pump coupled through a rotational shaft for boosting the pressurized raw water discharged from said positive-displacement piston pump by actuating said turbine with a portion of the concentrated water discharged from said reverse osmosis membrane cartridge and driving said booster pump and for adding the boosted water discharged from said booster pump to the high-pressure water discharged from said high-pressure pump.

2 more elements

A power recovery system comprising:

a high-pressure pump for pressuring raw water;
a reverse osmosis membrane cartridge for treating high-pressure water discharged from said high-pressure pump with a reverse osmosis membrane to produce treated water,
a positive-displacement piston pump for pressuring raw water under the pressure of concentrated water which is discharged from said reverse osmosis membrane cartridge without being treated by said reverse osmosis membrane;
and
a pump turbine comprising a turbine connected to receive the high-pressure water discharged from said high-pressure pump, and
a booster pump connected to receive the pressurized raw water discharged from said positive-displacement piston pump, the turbine and booster pump being coupled to one another through a rotational shaft, wherein the pressure of the pressurized raw water discharged from said positive-displacement piston pump is boosted by the booster pump of said pump turbine, by actuating said turbine with the high-pressure water discharged from said high-pressure pump and driving said booster pump via said rotational shaft, and for adding the boosted water discharged from said booster pump to the high-pressure water discharged from said high-pressure pump.

3 more elements

Dependencies are inferred from the claim text.

Power recovery system

Life of this patent

Power recovery system

Life of this patent

Abstract

Claims30