Apparatus and method for ferrate preparation

A ferrate and tank technology, applied in chemical instruments and methods, water treatment parameter control, polluted groundwater/leachate treatment, etc. Achieve the effect of small footprint of the device, lower tank voltage, and low cost

Pending Publication Date: 2019-11-12
CHINA ENFI ENGINEERING CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of process equipment occupies a large area, the power efficiency is low, the anode utilization rate is low, and the iron produced by electrolysis is not easy to discharge, and it adheres to the plate and is continuously oxidized, losing its effectiveness

Method used

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  • Apparatus and method for ferrate preparation

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preparation example Construction

[0035] According to the device for preparing ferrate according to the embodiment of the present invention, a diaphragm is arranged in the tank body, and the diaphragm divides the tank body into a first reaction zone and a second reaction zone, and sodium hydroxide is respectively set in the first reaction zone and the second reaction zone And / or potassium hydroxide and the first electrolytic basket and the second electrolytic basket, and the first electrolytic basket and the second electrolytic basket are hollow and filled with electrolytic materials, and the first electrolytic basket is electrically connected to the positive pole of the power supply React with the electrolytic material in one of the second electrolytic baskets: Fe+8OH - = FeO 4 2- +4H 2 O+6e - , while the reaction occurs at the other of the first and second electrolytic baskets electrically connected to the negative pole of the power supply: 6H 2 O+6e - =3H 2 +6OH - , the total reaction is Fe+2OH - +2...

Embodiment 1

[0041] Add sodium hydroxide solution / or potassium hydroxide solution (concentration is 18mol / L) respectively in the tank body of the present application, the first electrolysis basket is made of stainless steel, and the electrolytic material in the first electrolysis basket is pure iron, the second The second electrolysis basket is made of graphite, the electrolysis material in the second electrolysis basket is carbon steel, the positive electrode of the commutation power supply is periodically electrically connected with one of the first electrolysis basket and the second electrolysis basket, The negative electrode is periodically electrically connected to the other of the first electrolysis basket and the second electrolysis basket, and the current density of the electrolysis reaction is 50A / m 2 , the temperature is 50 degrees Celsius, and the reversing period of the reversing power supply is 30min. Sodium ferrate is collected under the electrolytic basket as the anode, and t...

Embodiment 2

[0043] Add potassium hydroxide solution (concentration is 14mol / L) respectively in the tank body of the present application, the first electrolysis basket is made of titanium, and the electrolysis material in the first electrolysis basket is iron-carbon alloy, the second electrolysis basket The basket is made of copper, the electrolytic material in the second electrolysis basket is pure iron, the positive pole of the commutation power supply is periodically electrically connected with one of the first electrolysis basket and the second electrolysis basket, and the negative pole of the commutation power supply is periodically The other one of the first electrolysis basket and the second electrolysis basket is electrically connected, and the current density of the electrolysis reaction is 500A / m 2 , the temperature is 20 degrees Celsius, the reversing period of the reversing power supply is 120min, and the potassium ferrate is collected under the electrolytic basket as the anode,...

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Abstract

The invention discloses a device and method for ferrate preparation. The device comprises: a cell body in which a separator membrane is arranged and divides the cell body into a first reaction zone and a second reaction zone, with the first reaction zone being provided with a first discharge opening at the bottom, and the second reaction zone being provided with a second discharge opening at the bottom; an electrolytic basket comprising a first electrolytic basket disposed in the first reaction zone and a second electrolytic basket disposed in the second reaction zone, with the first and second electrolytic baskets being hollow and filled with an electrolytic material; a power supply the positive electrode of which is electrically connected to one of the first and second electrolytic baskets, and the negative electrode of which is electrically connected to the other of the first and second electrolytic baskets. The ferrate can be prepared effectively through the device, the cell voltage is effectively reduced, the device has small floor space and low construction cost, and the ferrate has a high removal rate when the ferrate is used for a wastewater COD removal process.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a device and method for preparing ferrate. Background technique [0002] At present, the wastewater terminal in the non-ferrous industry usually adopts electrochemical treatment process. Traditional electrochemical treatment generally adopts the method of open electrolytic cell and iron plate commutation electrolysis. This method is atmospheric pressure and simple equipment, and is widely used. However, this kind of process equipment occupies a large area, the power efficiency is low, the anode utilization rate is low, and the iron produced by electrolysis is not easy to discharge, and it adheres to the plate and is continuously oxidized, losing its effectiveness. [0003] Therefore, the existing electrochemical treatment technology suitable for non-ferrous industry wastewater needs to be further improved. Contents of the invention [0004] The present...

Claims

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Application Information

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IPC IPC(8): C25B1/14C25B9/08C02F1/72C02F103/06C25B9/19
CPCC25B1/14C02F1/72C02F2103/06C02F2209/08C25B9/19
Inventor 孙宁磊刘苏宁李明川秦丽娟王霄
Owner CHINA ENFI ENGINEERING CORPORATION
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