Pressure exchanger energy recovery cylinder

Abstract

The invention discloses a pressure exchanger energy recovery cylinder. The pressure exchanger energy recovery cylinder adopts the structure that a left cylinder barrel and a right cylinder barrel are respectively mounted on the two sides of a central block; a piston rod is mounted on the central block; the two ends of the piston rod respectively extend into the left cylinder barrel and the right cylinder barrel to be connected with a left piston and a right piston; rare earth permanent magnets are mounted on the outer side ends of the left piston and the right piston; a left end cover and a right end cover are mounted on the outer side ends of the left cylinder barrel and the right cylinder barrel; magnetic approach switches mounted on a rack are respectively close to a left end cover and a right end cover; holes are formed in the left end cover and the right end cover; four aperture passages are formed in each of the top and the bottom of the central block; the four aperture passages in the top are in one-to-one correspondence with and connection with four connectors of a four-way rectifying valve; the four aperture passages in the bottom are in one-to-one correspondence with and connection with four connectors of a two-position four-way rectifying valve. The pressure exchanger energy recovery cylinder can automatically adapt to different shaft errors between the left and right cylinder barrels and the central block through a radial clearance between a piston counter bore and the piston rod, and has the advantages of compact structure, reliable operation, convenience in maintenance and the like.

Description

technical field [0001] The invention relates to a mechanical device for recovering residual pressure energy of a pressurized fluid, in particular to a pressure exchange energy recovery cylinder used in a reverse osmosis seawater desalination system. Background technique [0002] Reverse osmosis seawater desalination is one of the mainstream technologies for seawater desalination. The reverse osmosis seawater desalination process needs to consume a lot of electricity to increase the inlet water pressure to overcome the osmotic pressure of the water. High energy consumption is one of the main factors for the high cost of seawater desalination. In the seawater desalination process, the residual pressure of the concentrated brine discharged from the reverse osmosis membrane is as high as 5.5-6.5MPa. Recovering this part of energy into water energy can greatly reduce the energy consumption of reverse osmosis seawater desalination, thereby reducing the cost of seawater desalinatio...

AI Technical Summary

Problems solved by technology

One end of the floating piston rod is floatingly installed on the piston through a fixed flange, which can reduce the coaxiality requirements of the piston rod and the piston, but the installation is more troublesome, especially for the two-way booster cylinder

[0008] Chinese patent (publication number CN1230637A) discloses a two-way supercharger, which adopts an ordinary low-pressure source and can become a high-pressure source through the supercharging action of the supercharger, but lacks a floating mechanism between the piston and the piston rod, and cannot adapt to the left and right cylinders and The problem of different shafts between the intermediate connecting blocks, and the reversing travel switch is installed inside the cylinder, which is not conducive to maintenance and adjustment

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