Small reverse osmosis seawater desalting system with energy reclaiming high-pressure pump

Abstract

The invention discloses a small reverse osmosis seawater desalting system with an energy reclaiming high-pressure pump. The high-pressure pump comprises a low-pressure raw water inlet, a high-pressure raw water outlet, a high-pressure thick water inlet, a low-pressure thick water discharge port, a plunger pump head for boosting raw water, a double-extension shaft motor and a plunger motor for reclaiming energy of reverse osmosis high-pressure thick water, wherein the plunger pump head, the double-extension shaft motor and the plunger motor share a rotating shaft. A seawater desalting device at least comprises a water suction pump, a pretreatment assembly and a reverse osmosis membrane assembly. A process comprises that: after seawater is pretreated, enters the high-pressure pump and is boosted, the sweater enters a reverse osmosis membrane pressure container from the high-pressure raw water outlet, fresh water after desalting of a reverse osmosis membrane is produced water, the thick salt water from the reverse osmosis pressure container enters the high-pressure pump and residual pressure is reclaimed, and the low-pressure thick salt water after the residual pressure is reclaimed is discharged from the low-pressure thick water discharge port of the energy reclaiming high-pressure pump. The system can reclaim and utilize the energy of the reverse osmosis high-pressure thick water at the same time of boosting the raw water so as to reduce the energy consumption of a reverse osmosis system.

Description

technical field [0001] The invention relates to a seawater desalination system, in particular to an axial piston type (plunger type) high-pressure pump with energy recovery function for a small-scale reverse osmosis seawater desalination system and a small-scale seawater desalination process using the high-pressure pump. Background technique [0002] The reverse osmosis desalination technology uses a high-pressure pump to pressurize the raw water to reach the required operating pressure, and then the pressurized raw water flows into the pressure vessel of the reverse osmosis membrane, and the fresh water that passes through the reverse osmosis membrane becomes product water. The concentrated brine that has not passed through the reverse osmosis membrane is discharged with high pressure. [0003] An important goal of the development of reverse osmosis desalination technology is to reduce operating costs. Energy consumption accounts for the largest proportion in the compositio...

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Problems solved by technology

[0007] Aiming at the above prior art, the present invention provides an energy recovery high-pressure pump for a small-scale reverse osmosis seawater desalination system. Using the small-scale reverse osmosis seawater desa

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