Process and apparatus for treating water by magneto-electric dialysis

A dialyzer and magnetoelectric technology, applied in the field of equipment for electrochemical treatment of water, can solve the problem of reducing membrane and electrode electrodialysis performance and service life, water treatment speed and treatment quality can no longer be improved, current efficiency can no longer be improved, etc. problems, to reduce the frequency of dismantling and washing or frequent pole reversal, improve water treatment capacity, improve use efficiency and service life

Inactive Publication Date: 2004-08-18
陈树庆 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the above process has been carried out for a period of time, due to scaling and electrode polarization on the ion exchange membrane and the two electrodes, the speed of seawater desalination gradually slows down, the quality of the effluent water decreases, and the power consumption increases.
The disadvantages of existing electroosmotic devices are: 1) the positive and negative ion migration speed depends on the structure, material and current density of the electrodialyzer, the properties of the water to be treated, etc. Once the equipment has been made and installed, all the above parameters will become stable. Therefore, the water treatment speed and treatment quality can no longer be improved, the current efficiency can no longer be improved, and the power consumption cannot be reduced; 2) The scale and electrode polarization that appear on the anion and cation exchange membranes and the two electrodes will The electrodialysis performance and service life of the membrane and electrode are reduced, so it must be washed in time, and in serious cases, it must be disassembled and washed, thereby reducing the water treatment capacity, and this operation is troublesome and time-consuming; method, although it can partially solve the problems of fouling and polarization, but every time the electrode is reversed, the production must be stopped, which affects the productivity

Method used

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  • Process and apparatus for treating water by magneto-electric dialysis
  • Process and apparatus for treating water by magneto-electric dialysis
  • Process and apparatus for treating water by magneto-electric dialysis

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Experimental program
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Embodiment 1

[0014] Embodiment 1. present embodiment magnetoelectric dialyzer, its structure can be from Figure 5 see, and its internal structure can refer to figure 1 and figure 2 . It contains a shell 1 with six shell walls up, down, left, right, front, back, and the upper and lower shell walls of the shell are provided with raw water inlets 11a and 11b (except that 11a and 11b must be separated when the poles are frequently reversed, the rest of the case Tubes 11a and 11b can be combined into one), electrode flushing water inlet 16 (wherein 16b is the anode flushing water inlet, 16a is the cathode flushing water inlet), electrode flushing water outlet 12 (12b is the anode flushing water outlet, if flowing out dilute Acid solution chlorine water; 12a is the cathode washing outlet, such as flowing out dilute lye (NaOH), desalinated water outlet 13a and concentrated water outlet 13b; there are anode chamber 14 and cathode chamber 15 in the housing, anode 2a is arranged in the anode ch...

Embodiment 2

[0016] Embodiment 2. The difference from Embodiment 1 is that the strength of the static magnetic field between the two permanent magnet plates 6 is not less than 0.5 Tesla. Because the Lorent magnetic force Fm=qvB is proportional to the magnetic field strength B, the greater the magnetic field strength is, the better the design offset force of the static magnetic field is to the ions, the better the effect is, and it is also beneficial to improve the water treatment speed. It would be more ideal if a superconductor strong magnetic field above 20 tesla could be used. In addition, since the Lorent magnetic force is a vector, the electrodialysis space of the magnetoelectric dialysis device of the present invention must be non-loop type, so that the liquid flow flows along the entire membrane surface, and the general direction of the flow velocity remains consistent.

Embodiment 3

[0017] Example 3. Available from Figure 5 It can be seen from the figure that the difference from Embodiment 1 and Embodiment 2 is that the two shell walls of the shell parallel to the water flow and the current direction are high magnetic permeability material plates 17, and the rest of the shell walls are all magnetically permeable than before. Low magnetic permeability material plates with low shell walls. In order to overcome the magnetic field shielding effect of the remaining shell walls, the effect on the applied magnetic field is reduced.

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Abstract

A magneto-electric dialysis process for desalinating seawater, preparing salt from seawater and desalting industrial water is characterized by that on the basis is existing electric dialysis equipment, a static magnetic field is additionally used to directionally shift the cations and anions in flowing solution. Its apparatus is composed of a casing with different water inlets and outlets and electrodes, a group of cationic exchange membranes and anionic exchange membranes, which are alternatively arranged between anode and cathode, and a permanent magnet attached to each wall of the casing. Its advantages are high throughput, less electric consumption and not scaling.

Description

technical field [0001] The invention relates to a device for treating water by electrochemical method. In particular, a permanent magnetic plate is added to the existing electrodialyzer to enhance the directional deviation of charged particles in the solution and the equipment for magnetic treatment and descaling of water. It can be widely used in seawater desalination, brackish water desalination, seawater concentration salt production, industrial water desalination, etc. Background technique [0002] The existing water treatment equipment is an electrodialyzer, which is based on the electrodialysis method, that is, the selective permeability of the ion exchange membrane is used in a direct current electric field to make the positive and negative ions in the water or solution flow to the anion exchange membrane and cation exchange respectively. The membrane is used for directional migration, and its structure can be obtained from Figure 1 ~ Figure 3 As seen in the figure,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/469C02F1/48
CPCY02A20/124
Inventor 陈树庆张东红
Owner 陈树庆
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