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Three-layer film four-chamber aqueous solution plate-and-frame electrolytic cell and application thereof

A three-membrane, four-chamber, electrolyzer technology, applied in the electrolyzer and its application fields, to achieve full utilization of electric energy, low environmental risk, and stable performance

Inactive Publication Date: 2016-12-14
国能宝清煤电化有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a three-membrane four-chamber aqueous solution plate-frame electrolytic cell suitable for the regeneration of chromium-containing waste liquid and its application, so as to solve the problem of the recycling and utilization of chromium-containing waste water in the above-mentioned background technology, and improve the efficiency of electrolysis. Slot space-time yield makes full use of electrical energy

Method used

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  • Three-layer film four-chamber aqueous solution plate-and-frame electrolytic cell and application thereof
  • Three-layer film four-chamber aqueous solution plate-and-frame electrolytic cell and application thereof
  • Three-layer film four-chamber aqueous solution plate-and-frame electrolytic cell and application thereof

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Embodiment 1

[0030] (a) Installation of the electrolyzer: see Figures 1 to 4 , a structural schematic diagram of a three-membrane four-chamber aqueous solution plate-and-frame electrolyzer, with an electrolyzer end plate, a silica gel gasket, an electrolyzer frame plate, a meshed titanium cathode electrode, a meshed titanium-based lead dioxide anode electrode, and a cationic membrane , anion membrane, and PP plastic mesh protection plate are assembled in sequence, and are fastened and fixed with eight 304 stainless steel screws that have been insulated. After static and pressurized leak test, the electrolytic cell has no leakage. After leakage inspection, there is no leakage in the electrolytic cell.

[0031] Among them, the cell body of the electrolytic cell is made of polypropylene or polytetrafluoroethylene, and the cell body of the electrolytic cell is made of polypropylene, which is stable to most chemical reagents. A perfluorosulfonic acid cation exchange membrane and a homogeneous...

Embodiment 2

[0037] (a) the installation of electrolyzer is the same as embodiment 1

[0038] (b) Electrolytic treatment: inject 100L anolyte containing 0.8123mol / L chromium sulfate and 0.6mol / L sulfuric acid into the anode chamber, inject 100L1mol / L sulfuric acid solution into the acid chamber, and inject 100L0.8mol / L potassium sulfate solution In the salt chamber, inject 100L0.6mol / L potassium hydroxide solution into the cathode chamber, apply constant current direct current to the two poles of the three-membrane four-chamber electrolytic cell for electrolysis, and control the current density to 1100A / m 2 , during the electrolysis process, the electrolyte in each electrolysis chamber is forced to circulate with a matching corrosion-resistant circulating pump, the liquid flow rate in each electrolysis chamber is controlled to be 50L / min, the electrolyte is heated in the circulation tank, and the temperature of the electrolyte is kept at 58±2°C; electrolyze for 9 hours under this condition...

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Abstract

The invention provides a three-layer film four-chamber aqueous solution plate-and-frame electrolytic cell and application thereof, belongs to the field of electrochemical industries, and aims to solve the problem about recycling of chromium-containing wastewater and to improve the time-space yield of the electrolytic cell for sufficient utilization of the electric energy. The electrolytic cell comprises a cathode chamber, a salt chamber, an acid chamber and an anode chamber which are sequentially arranged and connected together, wherein a cationic film I is arranged between the cathode chamber and the salt chamber; a cationic film II is arranged between the acid chamber and the anode chamber; an anionic film is arranged between the salt chamber and the acid chamber; the anode chamber contains a sulfuric acid solution of chromium sulfate; the acid chamber contains a sulfuric acid solution; the salt chamber contains sodium sulfate or a potassium sulfate solution; the cathode chamber contains sodium hydroxide or a potassium hydroxide solution; and electrolytes in all the chambers flow in a down-in and up-out manner and are forcibly circulated by matched corrosion-resistant circulating pumps. By utilization of the electrolytic cell provided by the invention, the anodic current efficiency reaches 65-75%, the cathodic current efficiency reaches 80-90%, the total current efficiency reaches 145-165%, and the time-space yield of the electrolytic cell is greatly improved.

Description

technical field [0001] The invention relates to an electrolytic cell and its application, belonging to the field of electrochemical industry. Background technique [0002] Chromium is one of the five heavy metals, which can easily enter human cells and cause great damage to organs and tissues such as the skin, gastrointestinal tract, eyes, ears, liver and kidneys, and its accumulation in the human body is carcinogenic, teratogenic, and mutagenic. This year's "chromium capsules" and "chromium pollution" incidents emerged one after another, which not only endangered human health, but also caused serious pollution of the natural environment. At present, the treatment methods for chromium-containing sewage generated in the production process mainly include chemical methods, microbial methods, ion exchange methods, adsorption methods, and electrolysis methods. [0003] The principle of the chemical method is to add a reducing agent such as ferrous sulfate under acidic conditions...

Claims

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Application Information

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IPC IPC(8): C25B9/10C25B15/08C25B9/23
CPCC25B15/08C25B9/23
Inventor 张照武孙跃张福水李宝才角仕云覃豪钱玺丞张敉秦谊戴伟锋何静向诚
Owner 国能宝清煤电化有限公司