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Processing method for electro-adsorption demineralized water

A treatment method and electro-adsorption technology, applied in separation methods, dispersed particle separation, etc., can solve the problems of blockage of electro-adsorption module channels, prolonged electrode usage time, and unsatisfactory electrode regeneration effect, so as to avoid system pressure rise and avoid Effect of fouling tendency

Active Publication Date: 2014-11-26
CHINA PETROLEUM & CHEM CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Invention patent CN102010039A believes that the decline in the desalination efficiency of the electro-adsorption module is due to the incomplete long-term regeneration of the module
The process steps are cumbersome and the electrode regeneration effect is not good
[0006] Invention patent CN102126772A believes that the decrease in desalination efficiency of the electro-adsorption module is due to the prolonged use of the electrode and the formation of a large number of acidic groups with ion exchange on the surface.
However, due to the deficiencies in the acid regeneration process, the electrode regeneration effect is not ideal.
[0007] The inventors of the present invention believe that another reason for the continuous decrease in electrode adsorption efficiency in the electro-adsorption desalinated water treatment method is that the channels in the electro-adsorption module are blocked due to fouling of the electro-adsorption module.
The literature report about solving this technical problem has not yet seen

Method used

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  • Processing method for electro-adsorption demineralized water
  • Processing method for electro-adsorption demineralized water
  • Processing method for electro-adsorption demineralized water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] A treatment method for electro-adsorption desalinated water of the present invention, see figure 1 .

[0053] Including the following steps:

[0054] a power-on working process

[0055] ① Pre-arrangement steps

[0056] The working pump (3) draws the water to be treated from the water inlet tank 2 to be absorbed and desalinated by the electro-adsorption module 1, and the initial water production that has not yet reached the technical index enters the intermediate water tank B12;

[0057] ② Adsorption desalination step

[0058] The working pump (3) draws the water to be treated from the water inlet tank 2 to be absorbed and desalinated by the electro-adsorption module 1, and the produced water that reaches the technical index enters the produced water tank 6;

[0059] ③Back steps

[0060] When the output water quality of the adsorption desalination step ② cannot meet the technical indicators, inject industrial hydrochloric acid into the electro-adsorption module 1 wh...

Embodiment 2

[0073] According to the method and steps of embodiment 1, the difference is:

[0074] 1. The pre-discharging step ① in the power-on working process a is omitted, and the working pump (3) draws the water to be treated from the water inlet tank (2) to be adsorbed and desalinated by the electro-adsorption module 1, and the output water reaches the technical level. indicators, directly into the product water tank6.

[0075] 2. In the last step ③ of the power-on work process a, when the technical index of the produced water in the adsorption desalination step ② is close to a certain set value exceeding the standard, the industrial hydrochloric acid is injected into the The electro-adsorption module controls the water after injecting hydrochloric acid until it is just full of the electro-adsorption module system and is not discharged from the system; and the pH value range of the electro-adsorption module system is controlled between 3.0 and 5.0; at the same time as hydrochloric aci...

Embodiment 3

[0078] According to the method and steps of embodiment 1, see figure 2 .

[0079] The difference is:

[0080] 1. In the back step ③ of the power-on work process a

[0081] When the output water quality of the adsorption desalination step ② cannot meet the technical indicators, inject industrial hydrochloric acid into the electro-adsorption module 1 while continuing to supply water and electricity, and control the water injected with hydrochloric acid, just to fully charge the adsorption module system, instead of until it is discharged from the system; and the pH range of the electro-adsorption module system is controlled between 4.5 and 6.0; at the same time as hydrochloric acid is injected, the produced water is switched from normally entering the produced water tank 6 to being discharged into the intermediate water tank B 12; After the adsorption module system is fully charged, stop the water supply, cut off the power supply, and enter the process of discharging and resti...

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Abstract

The invention discloses a processing method for electro-adsorption demineralized water, which belongs to the water processing with an electrochemical separation method. The processing method for the electro-adsorption demineralized water comprises the following technical processes of energizing working, discharging for standing, carrying out short circuit and regenerating, and has the characteristics that industrial hydrochloric acid is injected into an electro-adsorption module (1) under the condition of continuously feeding water and energizing before the technical process of discharging for standing; water injected with the hydrochloric acid is controlled to just fill in the electro-adsorption module without being discharged out of the system; in addition, the pH (Potential Of Hydrogen) value range of the electro-adsorption module is controlled to 2.0-6.0; while the hydrochloric acid is injected, yielding water normally enters a water production tank (6) and is switched to a middle water discharging tank B (12); and after the electro-adsorption module is full of the hydrochloric acid, water is stop to feed, and the power supply is cut off to enter the technical processes of discharging for standing and regenerating. The invention provides the processing method for the electro-adsorption demineralized water, which has the advantages of simple step and excellent electrode regeneration effect, the electro-adsorption module does not scale, and an electro-adsorption demineralizer is guaranteed to continuously and stably operate for a long term.

Description

technical field [0001] The invention relates to an electric adsorption desalination treatment method. It belongs to the treatment of water by electrochemical separation method. Background technique [0002] The reuse of wastewater and sewage can not only save precious water resources, but also greatly reduce sewage discharge and protect the natural environment on which human beings live, which is of great significance to human life and sustainable economic development. Industrial wastewater generally adopts the process of secondary biochemical treatment-filtration-activated carbon adsorption-reverse osmosis treatment, and then reuse. In the prior art, for low-hardness, low-corrosion, and low-salt refinery wastewater, the external drainage after secondary biochemical treatment can reach the standard. After flocculation sedimentation, filtration and sterilization treatment, it can be directly reused as circulating cooling water for replenishment. However, for industrial was...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/469
Inventor 黄斌潘咸峰梁明张广
Owner CHINA PETROLEUM & CHEM CORP
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