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Water distribution structure and water distribution method of SPE (Solid Phase Extraction) electrolytic tank

An electrolytic cell and wastewater technology, which is applied in the field of water distribution structure of SPE electrolytic cell, can solve the problems of increasing operating costs and increasing energy consumption.

Active Publication Date: 2014-12-17
BEIJING JINDAYU ENVIRONMENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to overcome the concentration potential and maintain the current intensity, the pressure of the SPE electrolyzer must be increased, resulting in increased energy consumption
If external acid and alkali are added to adjust the pH of the cathode and anode, it will inevitably increase the operating cost and bring the pressure of desalination of the subsequent treatment water

Method used

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  • Water distribution structure and water distribution method of SPE (Solid Phase Extraction) electrolytic tank
  • Water distribution structure and water distribution method of SPE (Solid Phase Extraction) electrolytic tank
  • Water distribution structure and water distribution method of SPE (Solid Phase Extraction) electrolytic tank

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] The SPE electrolyzer adopts Ti wire woven mesh, and is coated with SnCl 4 and SbCl 3 (According to 9:1, total concentration 1.1mol / L) butanol solution, drying at 125°C for 5 minutes, thermal decomposition and sintering at 500°C for 5 minutes, and reciprocating operation 10 times to prepare Ti / SnO 2 -Sb 2 o 5 Solid solution anode catalyst layer 5; nickel mesh is used as the cathode, and the cathode and anode are separated by an ion exchange membrane 7 (such as Nafion), and the effective area of ​​the electrodes is 150cm 2 . The operation mode of SPE electrolytic cell for electrooxidation treatment of coking wastewater is as follows: SPE electrolytic cell distributes water according to water distribution method a (such as image 3 ), that is, the coking wastewater enters the anode of the SPE electrolyzer at a certain flow rate (step 311), and after the electrolytic oxidation of the anode of the electrolyzer, the treated water flows into the sump (step 312); the water ...

Embodiment 2

[0076] The SPE electrolyzer adopts Ti wire braided net, and the preparation method of the anode catalytic layer is as embodiment 1; Adopt the nickel net as the cathode, the cathode and the anode are separated by the ion exchange membrane 7 (such as Nafion), and the electrode effective area is all 150cm 2 . The operation mode of SPE electrolytic cell for electrooxidation treatment of coking wastewater is as follows: SPE electrolytic cell distributes water according to water distribution method b (such as Figure 4 ), that is, the coking wastewater enters the SPE electrolyzer anode (step 321) with the flow rate Q1, and after the electrolytic oxidation of the electrolyzer anode, the treated water enters the sump (step 322); a part of the water in the sump enters with the flow rate Q2 of 10-50% Q1 The cathode of the electrolyzer (step 323), after the cathode is electrolyzed to produce hydrogen, flows back into the water collection tank (step 324); the final treated water flows out...

Embodiment 3

[0081] The SPE electrolyzer adopts Ti wire braided net, and the preparation method of the anode catalytic layer is as embodiment 1; Adopt the nickel net as the cathode, the cathode and the anode are separated by the ion exchange membrane 7 (such as Nafion), and the electrode effective area is all 150cm 2 . The SPE electrolytic cell distributes water according to the water distribution method e (such as Figure 5 ), the specific operation mode is as follows: coking wastewater enters the cathode of the SPE electrolyzer at a flow rate Q (step 351), and after hydrogen is electrolyzed at the cathode of the electrolyzer, the wastewater enters the sump (step 352); the water in the sump enters the electrolyzer at a flow rate Q The anode (step 353), after anodic electro-oxidation treatment, finally flows out of the SPE anode (step 354). The SPE electrolyzer is fed with direct current between the cathode and the anode, and operates in a constant current charging mode.

[0082] When th...

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Abstract

The invention relates to a water distribution structure and a water distribution method of an SPE (Solid Phase Extraction) electrolytic tank. The water distribution structure comprises a water collecting tank, an ion exchange membrane, an anode chamber and a cathode chamber, wherein the anode chamber and the cathode chamber are positioned on two sides of the ion exchange membrane; an ion exchange membrane material is an anion exchange membrane or a cation exchange membrane; the anode chamber is provided with an anode water inlet and an anode water outlet; the cathode chamber is provided with a cathode water inlet and a cathode water outlet; the water collecting tank is provided with a water collecting tank water inlet and a water collecting tank water outlet; a waste water source to be treated is connected to the anode water inlet, the anode water outlet is connected to the water collecting tank water inlet, the water collecting tank water outlet is connected to the cathode water inlet, and the cathode water outlet is connected to treated treating water. According to the water distribution structure, a water distribution mode is simple, and tap water is unnecessary to add as catholyte; anode effluent water is low in pH, and the anode effluent water greatly reduces the pH of a cathode and reduces the pH concentration difference between a cathode and an anode after entering the cathode, so that the pressure of the electrolytic tank is greatly reduced; because the pH of the cathode is reduced, the cathode is reduced in scaling and blocking probability; final effluent water is in proximity to neutrality.

Description

technical field [0001] The invention relates to the technical field of water treatment industry in the field of environmental protection, in particular to a water distribution structure of an SPE electrolyzer and a water distribution method thereof. Background technique [0002] Many industrial wastewaters have poor biodegradability, and contain a large amount of ammonia, cyanide, phenols, pyridine, quinoline and many other inorganic and aromatic toxic and harmful substances, which are difficult to biodegrade. Electrochemical advanced oxidation is an effective method to treat such industrial wastewater. Electrochemical oxidation uses free radicals generated on the electrode surface (such as direct oxidation of hydroxyl radicals) or generated oxidants (such as indirect oxidation of hypochlorous acid), which can effectively oxidize and degrade water Organic Pollutants. In addition, the cathode can produce hydrogen by electrocatalytic reduction of protons in water at the catho...

Claims

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Application Information

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IPC IPC(8): C02F1/461
Inventor 曹文彬张艳苏洋王凤玉尹胜奎曹普晅
Owner BEIJING JINDAYU ENVIRONMENT TECH CO LTD
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