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Solar seawater recycling method

A treatment method, solar energy technology, applied in the field of solar seawater resource treatment, can solve problems such as large-scale use difficulties, achieve high production efficiency, save electric energy, and save operating costs

Inactive Publication Date: 2014-03-12
DONGHUA UNIV
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Problems solved by technology

It is difficult to use large-scale for life and production users

Method used

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the embodiments and accompanying drawings, but the present invention is not limited.

[0022] The solar seawater resource treatment method provided by the present invention can evaporate seawater to obtain fresh water products and by-products of concentrated brine; use the ion membrane to electrolyze the by-products of concentrated brine after seawater desalination to obtain important chemical products such as chlorine and alkali; use independent The solar photovoltaic power supply system directly provides electrolysis power for ion membrane electrolysis (no inverter is required). Form a new type of co-production industrial equipment that uses seawater as raw material and solar energy as energy for sustainable development.

[0023] The solar seawater resource treatment method provided by the present invention includes a seawater desalination step, a concentrated brine electrolysis step, and a phot...

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Abstract

The invention provides a solar seawater recycling method. The solar seawater recycling method comprises the processes of seawater desalination and strong brine electrolysis, wherein the process of seawater desalination comprises the steps that after being pretreated by a pretreatment unit, seawater carries out heat exchange with high-temperature steam in a spiral heat exchange tube in a heat exchange water tank, the high-temperature steam is condensed into a fresh water product in the heat exchange tube, and the fresh water product is collected; the seawater subjected to heat exchange in the heat exchange water tank is heated by a solar thermal collector and an evaporator in sequence and is evaporated in the evaporator; part of the fresh water steam generated by evaporating the seawater in the evaporator through heating is condensed on the oblique surface in a glass cover plate of the evaporator and is collected, and the other part of the fresh water steam is pumped into the heat exchange tube by an air pump to carry out heat exchange with the raw seawater outside the heat exchange tube; after the seawater in the evaporator is evaporated, the residual strong brine is electrolyzed by ion membrane electrolysis equipment. The method has the advantages that in the process of seawater desalination, the electric energy and the operating cost can be saved, and the generated Cl2, H2 and NaOH can serve as raw materials in the chlorine alkali industry.

Description

technical field [0001] The invention relates to an energy-saving and environment-friendly solar seawater resource treatment method, in particular to a solar seawater resource treatment process system and its by-product treatment process system. Background technique [0002] At present, the capacity of seawater desalination devices in the world is growing rapidly, at a rate of 10% to 30%, and the growth rate is still increasing gradually. More than 130 countries around the world are desalinating seawater, and more than half of the desalination capacity is concentrated in the Middle East Gulf countries, accounting for 70% of the Middle East's freshwater sources. There are mainly two kinds of engineering seawater desalination process routes at home and abroad: thermal method and membrane method. However, these two methods have the problems of complicated pretreatment, low localization of equipment, large energy consumption, and high processing costs. The comprehensive cost of...

Claims

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Application Information

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IPC IPC(8): C02F1/04C25B1/46C25B9/10C02F103/08C25B9/23
CPCY02A20/124
Inventor 曾庆福龙学军陈海英苏工兵徐爱华
Owner DONGHUA UNIV
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