Seawater pressure pump with potential energy recycling function

Abstract

The invention relates to a seawater pressure pump with a potential energy recycling function. The seawater pressure pump comprises a control device, a hydraulic cylinder, a first seawater tank and a second seawater tank, wherein the first seawater tank is partitioned into a first cavity and a second cavity; the second seawater tank is partitioned into a third cavity and a fourth cavity; a two-waypiston rod is arranged in the hydraulic cylinder; two ends of the two-way piston rod are respectively fixedly connected with a first piston and a second piston; a first raw water inlet and a first high-pressure raw water outlet are formed in the first cavity; a second raw water inlet and a second high-pressure raw water outlet are formed in the fourth cavity; water inlet one-way valves are arranged at the first raw water inlet and the second raw water inlet; water outlet one-way valves are arranged at the first high-pressure raw water outlet and the second high-pressure raw water outlet; the first raw water inlet and the second raw water inlet are communicated with a raw water source; a first concentrated water inlet and a first concentrated water outlet are formed in the second cavity; asecond concentrated water inlet and a second concentrated water outlet are formed in the third cavity. The seawater pressure pump disclosed by the invention is simple in pipeline connection and low inenergy consumption.

Description

technical field [0001] The invention relates to a seawater booster pump with potential energy recovery function, which belongs to the technical field of seawater desalination. Background technique [0002] In the field of seawater desalination, reverse osmosis membranes are used to separate ions contained in seawater from water molecules, and the pressure of seawater entering the reverse osmosis membrane must be higher than the osmotic pressure of the membrane, which is usually between 4MPa and 6MPa. between. The pressure of the concentrated seawater with high salinity produced after being filtered by the reverse osmosis membrane is only about 0.2 MPa lower than the pressure when it enters the reverse osmosis membrane. At this time, the concentrated seawater contains extremely high potential energy. If it is directly discharged, it will inevitably cause Great waste of energy. In order to reduce energy consumption and reduce the production cost of seawater desalination, the...

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Problems solved by technology

However, the pipeline connections of the three sets of devices are complicated and the energy consumption is high, which is not conducive to reducing production costs

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