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Stirring-type double-filtering desalting technology

A stirring and filtering technology, applied in the field of environmental chemistry, can solve the problems of reverse osmosis membranes, such as high environmental requirements, inability to adapt to complex actual environments, and inability to use for a long time, to achieve stable treatment effects, long service life, The effect of low running cost

Inactive Publication Date: 2016-12-14
SHAOXING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, as the current mainstream desalination technology, reverse osmosis technology has a series of problems in the face of complex industrial high-salt wastewater. The reverse osmosis membrane has high environmental requirements and cannot adapt to the complex actual environment; Easy to change, can't be used for a long time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A stirring type double filter desalination technology, the steps are as follows:

[0029] Step 1, the mixed high-salt wastewater enters the waste liquid regulating tank through the filter screen;

[0030] Step 2, add acid or alkali to the high-salt wastewater to adjust the pH value to 7, and then add it to the waste liquid tank through a high-pressure pump;

[0031] Step 3, pressurizing the waste liquid in the waste liquid tank into the nanofiltration membrane module, and the waste water enters the heating and stirring tank through the nanofiltration membrane module;

[0032] Step 4, stirring and heating the wastewater in the heating and stirring tank, and maintaining a constant temperature;

[0033] In step 5, the constant temperature waste liquid is added to the NACE membrane module, and after being filtered by the membrane, it enters the drainage tank to obtain the discharge water.

[0034] The acid solution in the step 2 adopts sulfuric acid, and the concentration...

Embodiment 2

[0044] A stirring type double filter desalination technology, the steps are as follows:

[0045] Step 1, the mixed high-salt wastewater enters the waste liquid regulating tank through the filter screen;

[0046] Step 2, add acid or alkali to the high-salt wastewater to adjust the pH value to 9, and then add it to the waste liquid tank through a high-pressure pump;

[0047] Step 3, pressurizing the waste liquid in the waste liquid tank into the nanofiltration membrane module, and the waste water enters the heating and stirring tank through the nanofiltration membrane module;

[0048] Step 4, stirring and heating the wastewater in the heating and stirring tank, and maintaining a constant temperature;

[0049] In step 5, the constant temperature waste liquid is added to the NACE membrane module, and after being filtered by the membrane, it enters the drainage tank to obtain the discharge water.

[0050] The acid solution in the step 2 adopts sulfuric acid, and the concentration...

Embodiment 3

[0060] A stirring type double filter desalination technology, the steps are as follows:

[0061] Step 1, the mixed high-salt wastewater enters the waste liquid regulating tank through the filter screen;

[0062] Step 2, add acid or alkali to the high-salt wastewater to adjust the pH value to 8, and then add it to the waste liquid tank through a high-pressure pump;

[0063] Step 3, pressurizing the waste liquid in the waste liquid tank into the nanofiltration membrane module, and the waste water enters the heating and stirring tank through the nanofiltration membrane module;

[0064] Step 4, stirring and heating the wastewater in the heating and stirring tank, and maintaining a constant temperature;

[0065] In step 5, the constant temperature waste liquid is added to the NACE membrane module, and after being filtered by the membrane, it enters the drainage tank to obtain the discharge water.

[0066] The acid solution in the step 2 adopts sulfuric acid, and the concentration...

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Abstract

The invention discloses a stirring-type double-filtering desalting technology. The technology comprises the following steps that 1, a mixed high-salinity wastewater is fed into a waste liquid adjusting tank through a filter screen; 2, the pH value is adjusted to be 7-9 by adding acid or alkali in the high-salinity wastewater, and then the high-salinity wastewater is added into a waste liquid tank through a high-pressure pump; 3, waste liquid in the waste liquid tank is pressurized to be added into a nanofiltration membrane assembly, and the wastewater is fed into a heating and stirring tank through the nanofiltration membrane assembly; 4, the wastewater in the heating and stirring tank is stirred and heated and keeps at constant temperature; 5, the constant-temperature waste liquid is added into an NACE membrane assembly and fed into a liquid discharge tank after being filtered by a membrane, and then discharged water is obtained. According to the stirring-type double-filtering desalting technology, the advantages of a membrane separating technology are fully utilized, the advantages of being free of pollution and low in energy consumption are achieved, and meanwhile the technical defects of a reverse osmosis (RO) membrane are overcome.

Description

technical field [0001] The invention belongs to the technical field of environmental chemistry, and in particular relates to a stirring type double-filter desalination technology. Background technique [0002] Membrane filtration is a screening process related to the pore size of the membrane. The pressure difference on both sides of the membrane is used as the driving force, and the membrane is used as the filter medium. Many small micropores only allow water and small molecular substances to pass through to become the permeate, while the substances in the original solution whose volume is larger than the micropore diameter of the membrane surface are trapped on the liquid inlet side of the membrane and become concentrated solution, thus realizing the separation of the original solution and concentration purposes. [0003] Reverse osmosis technology began to be studied in the 1950s. By the end of the 1960s, reverse osmosis membranes with industrial value were produced. In ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10
CPCY02A20/131C02F9/00C02F1/001C02F1/02C02F1/44C02F1/442C02F1/66
Inventor 令狐文生刘伟杨海
Owner SHAOXING UNIVERSITY