Filled-concentrate countercurrent electric demineralizer and method thereof

A countercurrent electric and electric desalination technology, applied in separation methods, ion exchange water/sewage treatment, dispersed particle separation, etc. The effect of scaling, reducing operating current and operating voltage

Active Publication Date: 2009-09-23
北京坎普尔环保技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The present invention aims to solve the technical problem of concentrated water scaling in existing electric desalination devices, and provides an electric desalination device and method for avoiding the problem of concentrated water scaling

Method used

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  • Filled-concentrate countercurrent electric demineralizer and method thereof
  • Filled-concentrate countercurrent electric demineralizer and method thereof
  • Filled-concentrate countercurrent electric demineralizer and method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] like figure 1 As shown, the electric desalination device is composed of forty pairs of anion exchange membranes and cation exchange membranes. The fresh water chamber 2, the concentrated water chamber 3 and the polar water chamber 1 are all filled with mixed ion exchange resins. The water and polar water enter and exit from the bottom, the conductivity of the feed water is 30uS / cm, the hardness is 10mg / L (calcium carbonate meter), the flow rate of fresh water is 3 cubic meters per hour, the flow rate of concentrated water is 0.3 cubic meters, and the flow rate of polar water is 0.06 cubic meters per hour. The operating parameters of the electrostatic desalination device are shown in Table 1 after the actual operation reaches a steady state.

[0028] Table 1 Test results of concentrated water filling countercurrent electric desalination device

[0029] Current (A) (±0.1)

[0030] After obtaining the above data, the countercurrent electric desalination device ...

Embodiment 2

[0032] like figure 2 As shown, the internal structure of the device is the same as in Example 1, but the inflows 200 and 300 of the concentrated water and the polar water are combined, and the effluents 210 and 310 of the concentrated water and the polar water are combined, and the inflow of the concentrated water and the polar water is fresh water Feed water conductivity 45uS / cm, hardness 35mg / L (calcium carbonate), other conditions are the same as in Example 1, and the operation parameters of the electrostatic desalination device are shown in Table 2 after reaching a steady state.

[0033] Table 2 Test results of high hardness applicable parts of concentrated water filling countercurrent electric desalination device

[0034] Current (A) (±0.1)

[0035] After obtaining the above data, the countercurrent electric desalination device has been continuously operated at 4.0A for 2000 hours, and the resistivity, flow rate of fresh water, flow rate and pressure of concent...

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Abstract

The invention relates to a water purification device using direct current as a driving force for deionization, and in particular discloses a filled-concentrate countercurrent electric demineralizer. The demineralizer is characterized in that: both an unconcentrate chamber and a concentrate chamber of the device are filled with ion conductors; and the flow directions of the unconcentrate and the concentrate are opposite at the same time. In the filled-concentrate countercurrent electric demineralizer and a method thereof of the invention, as the concentrate and the unconcentrate flow in opposite directions in the electric demineralizer, most calcium and magnesium ions, silicate ions, hydrogen silicate ions and other ions which enter the concentrate do not enter a polarized area at an unconcentrate effluent end; at the same time, as the concentrate is filled with the ion conductors, the salt content of concentrate feed water is extremely low; and therefore, the salinity difference between the concentrate and the unconcentrate at the unconcentate effluent end is reduced or eliminated and the excess current is reduced greatly so as to reduce the size and degree of the polarized area on film surface and avoid the scale formation tendency. The filled-concentrate countercurrent electric demineralizer and the method thereof enlarge the application range of electric demineralizers and widely and greatly reduce the electric energy consumption of the electric demineralizers for operation.

Description

Technical field [0001] The invention relates to a solution deionization device using direct current as the driving force for ions, in particular to a water purification device using direct current as the driving force for deionization. Background technique [0002] The main method of traditional fluid desalination is ion exchange method. The primary desalination is mainly realized by cation exchange bed and anion exchange bed, while the secondary desalination is generally realized by mixed ion exchange bed. The biggest problem with the ion exchange method is that the ion exchange resin must be regenerated with acid and alkali, thus causing a large amount of use of chemicals and environmental pollution; it also causes intermittent operation and fluctuations in operating parameters. The traditional primary desalination can be replaced by reverse osmosis, and the electric desalination device mainly replaces the traditional mixed ion exchange bed to produce secondary desalinati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/469C02F1/42
Inventor 孟广祯
Owner 北京坎普尔环保技术有限公司
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