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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AI-Extracted 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 wil...

Method used

(1) contrast A, B two groups of tests and can find, pH is bigger to the mineralization effect of scallop shell, when not adding carbon dioxide to regulate pH, almost no mineral is separated out (group A), adds carbon dioxide to regulate pH After reaching 4.3, the amount of mineral precipitation increased significantly (group B). Comparing the two groups of tests B and C, it can be found that the flow rate of water in the packed column has an impact on the mineralization effect of the scallop shell. When the flow rate is slow, the amount of mineral precipitation is greater. Increase the soaking time of water on the ore filter material, so that more minerals can be precipitated. Therefore, reducing the pH and increasing the soaking time is conducive to the diss...

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.

Application Domain

Water/sewage treatment by irradiationSeawater treatment +4

Technology Topic

Environmental chemistryCarbon dioxide +11

Examples

Experimental program(2)
Effect test(1)

Example Embodiment

[0024] Example 1:

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

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

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

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

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

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

[0031] 6) In step 5, the product water in the packed tower is added to the filter through the water transmission pipeline, and after entering the filter, the solid particles of the mineralized product water can be removed and the turbidity can be reduced. Turbidity can be monitored at all times using a turbidity sensor.

[0032] 7) adding the water filtered out in step 6) into the ultraviolet sterilization device to carry out ultraviolet sterilization to reduce the number of colonies.

[0033] 8) Add disinfectant to the ultraviolet sterilization device in step 7), and at the same time control the flow of the disinfectant.

[0034] 9) The product water in step 8) is directly stored in a drinking water storage tank, which can be used as drinking water.

Example Embodiment

[0035] Example 2:

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

[0037] 1) Take shells, medical stone, wood fish stone and zeolite that have been aged for two years.

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

[0039] 3) Add the crushed ore to 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 a flow sensor to monitor the flow of raw water.

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

[0042] 6) In step 5, the product water in the packed tower is added to the filter through the water transmission pipeline, and after entering the filter, the solid particles of the mineralized product water can be removed and the turbidity can be reduced. Turbidity can be monitored at all times using a turbidity sensor.

[0043] 7) adding the water filtered out in step 6) into the ultraviolet sterilization device to carry out ultraviolet sterilization to reduce the number of colonies.

[0044] 8) Add disinfectant to the ultraviolet sterilization device in step 7), and at the same time control the flow of the disinfectant.

[0045] 9) The product water in step 8) is directly stored in a drinking water storage tank, which can be used as drinking water.

PUM

Property	Measurement	Unit
Alkalinity	641.0
Hardness	642.1

Description & Claims & Application Information

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Double-membrane seawater desalination process

AI-Extracted Technical Summary

Problems solved by technology

Method used

Abstract

Examples

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

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