A seawater desalination system using waste heat of flue gas

Abstract

The invention discloses a seawater desalination system capable of making use of afterheat of smoke. The seawater desalination system comprises a seawater filtration device, a humidification tower, a dehumidification tower and a fresh water treatment device which are connected in sequence, wherein the humidification tower is provided with a smoke input opening, and smoke can be introduced into the humidification tower through the smoke input opening; the humidification tower is provided with a concentrated seawater discharging opening, and concentrated seawater can be discharged from the concentrated seawater discharging opening; the humidification tower is provided with a wet smoke discharging opening, and wet smoke can be discharged from the wet smoke discharging opening and conveyed to the dehumidification tower; the dehumidification tower is provided with a smoke discharging opening, and the humidified smoke can be discharged from the smoke discharging opening; the dehumidification tower is provided with a cooling water input opening, and cooling water can enter the dehumidification tower from the cooling water input opening; the dehumidification tower is provided with a wet smoke input opening, and the wet smoke can be discharged from the wet smoke discharging opening and can enter the dehumidification tower from the wet smoke input opening; the dehumidification tower is provided with a fresh water output opening, and fresh water can flow out from the fresh water output opening and reach the fresh water treatment device. The invention provides a system for desalinating the seawater by making use of the afterheat of the smoke and removing pollutants from the smoke.

Description

technical field [0001] The invention belongs to the fields of flue gas waste heat recovery and seawater desalination, in particular to a system for using flue gas waste heat to desalinize seawater. Background technique [0002] my country is a country with serious shortage of energy resources. Per capita remaining recoverable reserves of oil and natural gas are only 7.7% and 7.1% of the world average, and coal, which has relatively abundant reserves, is only 58.6% of the world average. Over the past 30 years of reform and opening up, my country's energy conservation and emission reduction work has achieved great results. Especially in the 21st century, the work of energy conservation and emission reduction has been carried out on a large scale. The new "Energy Conservation Law" has made resource conservation a basic national policy of our country, and energy conservation and emission reduction has become a national and major event involving the participation of the whole so...

AI Technical Summary

Problems solved by technology

In the field of seawater desalination technology using flue gas waste heat, He Hongzhou and Chen Zhiqiang developed a "new type of high-efficiency seawater desalination evaporator", but its basic principle is still the distillation method, and the indirect heat exchange method between seawater and flue gas is still used. The thermal coefficient is generally lower than 80W / m 2

In addition, the indirect heat exchange method also has the problems of easy scaling, regular maintenance, and poor heat exchange effect after long-term operation

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