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Efficient and controllable desalinated seawater mineralization process

A process and high-efficiency technology, applied in the field of highly efficient and controllable seawater desalination water mineralization process, can solve problems such as the inability to realize efficient utilization of carbon dioxide gas, achieve safe, stable and controllable process operating conditions, increase calcium ions and alkalinity, and efficiently The effect of using

Inactive Publication Date: 2017-05-03
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The Chinese patent application with the publication number CN102826689A discloses a post-treatment process and post-processing equipment after seawater desalination. Carbon dioxide gas is mixed with desalinated water through a gas dosing device and a static mixer, which cannot realize efficient utilization of carbon dioxide gas, and does not involve To the recovery and reuse of carbon dioxide gas tail gas,

Method used

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  • Efficient and controllable desalinated seawater mineralization process

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Embodiment 1

[0018] The compressed air produced by the air compression system 5 is fully mixed with the carbon dioxide gas (food grade) from the steel cylinder 3 in the static mixer 7, and the volume ratio is 1:20. The mixed gas enters from the bottom of the absorption tower 8, and the desalinated water in the desalinated water storage tank 1 is transported to the top of the absorption tower through the centrifugal pump 2, and the countercurrent contact is adopted to fully dissolve the carbon dioxide gas. The pH of the acidified water at the bottom of the tower is 5.5. The acidified water flowing out from the bottom of the absorption tower is transported to the bottom of the reactor 11 through the centrifugal pump 10, and passes through the reactor in an upflow manner. The particle size of the limestone filler in the reactor is 0.5mm, and the linear velocity of the rising water flow is 0.0012m / s. The mineralized water overflowing from the reaction kettle passes through the desorption tower...

Embodiment 2

[0020] The compressed air produced by the air compression system 5 is fully mixed with the carbon dioxide gas (food grade) from the cylinder 3 in the static mixer 7, and the volume ratio is 1:10. The mixed gas enters from the bottom of the absorption tower 8, and the desalinated water enters from the top of the absorption tower. Countercurrent contact is adopted to fully dissolve the carbon dioxide gas. The pH of the acidified water at the bottom of the tower is 4. The acidified water flowing out from the bottom of the absorption tower is transported to the bottom of the reactor 11 through the centrifugal pump 10, and passes through the reactor in an upflow manner. The particle size of the limestone filler in the reactor is 2.5mm, and the linear velocity of the rising water flow is 0.002m / s. The mineralized water overflowing from the reaction kettle passes through the desorption tower to remove excess carbon dioxide gas, and the finished mineralized water can be obtained. The ...

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Abstract

The invention provides an efficient and controllable desalinated seawater mineralization process. The process includes the steps of: fully mixing carbon dioxide gas (food grade) and compressed air according to certain ratio by a static mixer, then letting the mixture enter an absorption tower from the tower bottom, and making desalinated seawater enter the absorption tower from the tower top; letting acidified water flowing out from the absorption tower bottom enter a reaction kettle bottom in an upwelling way, with the reaction kettle filled with limestone filler of certain height; removing redundant carbon dioxide gas from mineralized water overflowing out of the reaction kettle by a desorption tower, thus obtaining the finished product mineralized water. The process provided by the invention not only can improve the desalinated water quality stability, but also can realize efficient utilization of carbon dioxide, and reduces the waste of carbon dioxide resources. Also the operation conditions of the whole process are safe, stable and controllable, thus greatly improving the economical efficiency and feasibility of the process.

Description

technical field [0001] The invention relates to the technical field of seawater desalination water post-treatment, in particular to an efficient and controllable seawater desalination water mineralization process. Background technique [0002] Seawater desalination technology is the main way to solve the crisis of fresh water resources, but the desalinated water lacks calcium and magnesium minerals needed by the human body, and the stability of the water body is extremely poor. It is highly corrosive and erosive to the original cast iron municipal water supply pipelines. Directly introducing desalinated water into the urban domestic water pipe network system will definitely break the chemical balance of the old pipe network system, thereby reducing the water quality of the delivered water. Therefore, it is very necessary to carry out a certain mineralization treatment on the desalinated water. by CO 2 The method of dissolving natural limestone is used to post-treat desalina...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04
CPCC02F9/00C02F1/66C02F1/68C02F1/688C02F2301/08
Inventor 唐娜孙权于江龙程鹏高张蕾
Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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