Post-treatment process and equipment of desalted seawater

A post-processing and process technology, applied in the field of post-processing after seawater desalination, can solve the problems of unstable water quality, corrosion, red water phenomenon, low calcium ion content, etc., and achieve the effect of stable water quality, sufficient reaction and simple overall structure

Inactive Publication Date: 2012-12-19
HANGZHOU WATER TREATMENT TECH DEV CENT
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Problems solved by technology

However, after seawater desalination treatment, the content of calcium ions is very low, the water quality is unstable and highly corrosive, and even the common red water phenomenon may occur

Method used

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  • Post-treatment process and equipment of desalted seawater
  • Post-treatment process and equipment of desalted seawater
  • Post-treatment process and equipment of desalted seawater

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Embodiment Construction

[0026] The post-treatment process after seawater desalination provided by the present invention comprises the following steps:

[0027] (1) Dosing CO in desalinated water 2 , and make it well mixed;

[0028] (2), will add CO 2 The desalinated water is mineralized in the mineralization pool,

[0029] In the mineralization pool, a calcium carbonate packing bed is set, and CO is added 2 The desalinated water passes through the calcium carbonate packing bed and fully contacts and reacts with the calcium carbonate, thereby increasing the alkalinity and hardness of the desalinated water.

[0030] The desalinated seawater refers to an aqueous solution obtained after seawater is treated by reverse osmosis, electrodialysis, distillation or freeze separation.

[0031] The present invention converts CO 2 Added to desalinated water, and then added CO 2 The desalinated seawater is passed into the mineralization pool for mineralization.

[0032] Added CO 2 is sufficient, and calcium...

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Abstract

The invention provides a post-treatment process of desalted seawater, comprising the following steps of: (1) adding CO2 into seawater desalted water and sufficiently mixing; and (2) mineralizing the seawater desalted water added with the CO2 in a mineralizing pool; arranging a calcium carbonate filler bed in the mineralizing pool; and enabling the seawater desalted water added with the CO2 to pass through the calcium carbonate filler bed to be sufficiently contacted and reacted with calcium carbonate. The invention further provides post-treatment equipment applying the method disclosed by the invention. According to the post-treatment process and equipment of the desalted seawater, the seawater desalted water is subjected to mineralization treatment, so that the alkalinity and the hardness of the seawater desalted water are improved; and finally, the water quality of finished product water can accord with Chinese Drinking Water Standards GB5749-2006 and World Health Organization Standards, and the finished product water is good for health of a human body. According to the equipment disclosed by the invention, the whole structure of the mineralizing pool is simple and the reaction in the mineralizing pool is sufficient and uniform, so that the calcium carbonate is automatically supplemented into the mineralizing pool by gravity according to the consumption of the calcium carbonate.

Description

technical field [0001] The present invention relates to a post-treatment after seawater desalination, in particular to a process and post-treatment equipment for increasing the alkalinity and hardness of water produced in a seawater desalination system (hereinafter referred to as: seawater desalination water). Background technique [0002] The shortage of fresh water resources in the world has become a growing concern. As an open-source incremental technology of water resources, seawater desalination has become a major method to solve global water shortages, and its application is becoming more and more widespread. Desalinated water is characterized by cleanliness, high purity and stable supply, and is a safe and reliable source of high-grade water. The desalinated product water can enter the tap water pipe network as an important water source for urban residents' production and life, and can also be used as the main water source for islands, ships, and offshore platforms; ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F1/68
Inventor 吴雅琴杨波朱力方明戴城怿张宏
Owner HANGZHOU WATER TREATMENT TECH DEV CENT
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