Seawater desalination energy recovery device

Abstract

The invention discloses a seawater desalination and energy recovery apparatus. The apparatus comprises a seawater desalination device and a pressure recovery device, the output port of the seawater desalination device is connected with a seawater pump through a pipeline, the output port of the seawater pump is respectively connected with a first one-way valve and a second one-way valve through shunting pipes, the output port of the second one-way valve is connected with a high pressure pump through a pipeline, the output port of the high pressure pump is connected with a second control valve through a pipeline, the output port of the second control valve is connected with a reverse osmosis membrane filter through a pipeline, the freshwater discharge opening of the reverse osmosis membrane filter is connected with a freshwater collecting tank, the other output port of the reverse osmosis membrane filter is connected with a first control valve through a pipeline, and the output port of the first discharge valve is connected with the pressure recovery device through a pipeline and is positioned at the high-pressure concentrated seawater inlet of a recovery chamber. The seawater desalination and energy recovery apparatus directly converts pressure energy into pressure energy, so the energy conversion efficiency is greatly improved, and wastes and consumption of energy are avoided.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a seawater desalination energy recovery device. Background technique [0002] The energy recovery device is one of the key devices of the reverse osmosis seawater desalination system, which is very important to greatly reduce the energy consumption of the system operation and the cost of water production. Most of the reverse osmosis seawater desalination projects that have been put into operation or are under construction in my country use energy recovery devices imported from abroad, which are very expensive, accounting for about 10-15% of the total project investment. The energy recovery device is an important link in the reverse osmosis seawater desalination industry chain, and it is also one of the key components that urgently need to be overcome in the development of the reverse osmosis seawater desalination industry in my country. The development of a domes...

AI Technical Summary

Problems solved by technology

[0007] Based on the technical problems existing in the background technology, the present invention proposes a seawater desalination energy recovery device, which has good dynamic performance, utilizes the existing energy conservation law, adopts a work exchange type energy recovery device, and utilizes the synchronization of the runners It reduces the loss during high-voltage conversion, and solves the problems of low conversion efficiency and large energy loss of existing seawater desalination energy recovery devices, resulting in ineffective recycling of energy and energy waste.

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