Reverse osmosis seawater desalination system using self-pressurization energy recycling high-pressure pump

Abstract

The invention discloses a reverse osmosis seawater desalination system using a self-pressurization energy recycling high-pressure pump. The process of the reverse osmosis seawater desalination system using the self-pressurization energy recycling high-pressure pump comprises the following steps: pumping seawater by using a raw water pump, performing pretreatment, directly feeding into the self-pressurization energy recycling high-pressure pump for pressurization, feeding the high-pressure raw material which meets the reverse osmosis pressure requirements into a reverse osmosis film pressure container, desalinating the seawater by using a reverse osmosis film, using the desalinated fresh water as water produced from a small-size seawater desalination system, feeding thick salt water discharged from the reverse osmosis film pressure container into the high-pressure thick water inlet of the self-pressurization energy recycling high-pressure pump for recycling residual pressure, and discharging the low-pressure thick salt water after the residual pressure is recycled from the low-pressure thick water outlet of the self-pressurization energy recycling high-pressure pump. The effective energy conversion efficiency in residual pressure utilization can be greater than 90%.

Description

technical field [0001] The invention relates to a reverse osmosis seawater desalination system using a self-pressurized energy recovery high-pressure pump, which belongs to the energy-saving technology in the seawater and brackish water reverse osmosis desalination system. Background technique [0002] The reverse osmosis desalination technology uses a high-pressure pump to pressurize the raw seawater to make it reach the required operating pressure. 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 passing 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 composition of operating costs, so reducing energy consumption is the...

AI Technical Summary

Problems solved by technology

[0005] The present invention is to solve the problem of high energy consumption of the small reverse osmosis seawater desalination system, and provides a reverse osmosis seawater desalination system using a self-pressurized energy recovery high-pressure pump, and the effective energy conversion efficiency of the remaining pressure utilization can reach more than 90%.

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