Multi-path pressure switcher for reverse osmosis sea water desalting energy recovery device

Abstract

The present invention discloses one multipath pressure switcher for reverse osmosis sea water desalting energy recovering apparatus, and belongs to the field of liquid after-pressure recovering technology. The switcher is a casing, a rotating core and end caps assembled to ends. The casing is provided one axial joint and two other joints distributed symmetrically about the axial joint. The rotating core is one hollow cylinder and has sealed joints on two ends, and each of the joints has two radial fan-shaped slots, two fan-shaped holes communicated to the central hole of the rotating core and one central pressure releasing slot communicated to the two fan-shaped slots. The present invention has the advantages of no fluctuation in flow rate and pressure of inflow and outflow salty water and sea water, low rotation speed of the rotating core without noise, good sealing performance, and less leakage and back mixing of salty water and sea water.

Description

technical field [0001] The invention relates to a multi-channel pressure switcher for a reverse osmosis seawater desalination energy recovery device, which belongs to the liquid residual pressure energy recovery technology. Background technique [0002] Reverse osmosis technology is one of the mainstream technologies for seawater desalination. The process operating pressure is usually as high as 5.5-7.0MPa, and the high-pressure concentrated brine discharged from the membrane module also has almost the same pressure level, which is greater than 5.0MPa. Because the water recovery rate of the reverse osmosis seawater desalination system, that is, the ratio of desalinated water to system feed seawater, is usually only 35%-45%, so more than half of the pressure input through the high-pressure pump in the desalination system can be retained in the concentrated brine. Therefore, recovering and utilizing the residual pressure energy of concentrated brine...

AI Technical Summary

Problems solved by technology

The energy recovery device described in patent ZL03101867.X uses multiple three-way valves to realize the pressure exchange process. This design has three disadvantages: first, the synchronization of valve opening and closing actions is difficult to ensure, and the system control is complicated; Second, because the valve needs to be opened and closed frequently during the operation of the device, its service life is shortened and leakage is prone to occur

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