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Double-membrane seawater desalination process

A double-membrane method and process technology, which is applied in seawater treatment, water/sewage treatment, chemical instruments and methods, etc., can solve the problems of increased bacterial colony count, less shell production, increased turbidity of product water, etc., and achieve mineral content The effect of increasing and improving the hardness of product water and high production efficiency

Pending Publication Date: 2020-07-10
青岛百发海水淡化有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing process implements the treatment process of carbon dioxide acidified shells, but the shells that have been aged for many years are used. The output of such shells is small and difficult to mine and utilize. The long-term operation of the equipment will lead to insufficient supply of fillers.
If new shells or shells with a short aging time are used, the turbidity of the treated product water will increase, and the number of bacterial colonies will also increase, which will affect the quality of the product water.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Double-membrane seawater desalination process specifically includes the following steps:

[0026] 1) Take shells aged for two years, which are easy to mine and obtain.

[0027] 2) Crushing the shells into 80 mesh particles.

[0028] 3) Add the crushed shells to the packed tower.

[0029] 4) Fully mix the raw water and carbon dioxide in the mixer. And adjust the pH value of carbon dioxide aqueous solution to 4.3. And use the flow sensor to monitor the flow of raw water.

[0030] 5) Add the carbon dioxide aqueous solution produced in step 4) to the packed tower. Using the acidity of the carbonic acid solution and the action of microorganisms, various minerals are precipitated from the ores and shells.

[0031] 6) The water produced in the packed tower in step 5 is added to the filter through the water delivery pipeline, and after entering the filter, the solid particles in the mineralized produced water can be removed and the turbidity can be reduced. And can use th...

Embodiment 2

[0036] Double-membrane seawater desalination process specifically includes the following steps:

[0037] 1) Take two-year-old shells, medical stone, wooden fish stone, and zeolite.

[0038] 2) Crush the ore in 1) into 60 mesh particles.

[0039] 3) Put the crushed ore into the packed tower.

[0040] 4) Add raw water and carbon dioxide into the mixer and mix thoroughly, and use a pH meter to adjust the pH value of the carbon dioxide aqueous solution to 4.0. And use the flow sensor to monitor the flow of raw water.

[0041] 5) Add the carbon dioxide aqueous solution produced in step 4) to the packed tower. Using the acidity of the carbonic acid solution and the action of microorganisms, various minerals are precipitated from the ores and shells.

[0042] 6) The water produced in the packed tower in step 5 is added to the filter through the water delivery pipeline, and after entering the filter, the solid particles in the mineralized produced water can be removed and the turb...

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PUM

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Abstract

A double-membrane seawater desalination process specifically comprises the following steps: (1) taking shells aged for two years; (2) crushing the shells into particles; (3) adding the crushed shellsinto a packed tower; (4) fully mixing raw water and carbon dioxide in a mixer; (5) adding a carbon dioxide aqueous solution generated in the step (4) into the packed tower; (6) adding the water produced in the packed tower in the step (5) into a filter through a water pipeline; (7) adding the water filtered in the step (6) into an ultraviolet sterilization device; and (8) putting the product waterin the step (7) directly into a drinking water storage tank for backup. The method has the beneficial effects that the hardness and mineral content of the produced water can be improved, the production efficiency is improved, the cost is saved, the produced water meets the requirements of drinking water, and the precipitation content of the trace element strontium reaches the standard of drinkingnatural mineral water.

Description

technical field [0001] The invention belongs to the technical field of seawater desalination, and in particular relates to a double-membrane seawater desalination process. Background technique [0002] In the double-membrane seawater desalination method, the water produced after the reverse osmosis desalination process has low mineral content. Drinking it for a long time will have adverse effects on the body, and the reverse osmosis produced water will corrode the water pipeline and cause red water phenomenon. Therefore, the reverse osmosis produced water needs to increase the mineralization process, increase the mineral content and alkalinity, so that the produced water meets the drinking water standard and is not corrosive. The existing mineralization method is mainly acid leaching mineral method. The acid leaching mineral method uses carbonic acid to dissolve limestone or other minerals. After the gas-liquid mixture dissolves carbon dioxide in water, the carbonic acid so...

Claims

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Application Information

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IPC IPC(8): C02F9/08C02F103/08
CPCC02F1/001C02F1/32C02F1/441C02F1/50C02F1/68C02F9/00C02F2103/08
Inventor 杨兴涛张晓东李珂乔明丽张卫军
Owner 青岛百发海水淡化有限公司
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