An electrochemical tubular treatment device and method for high-concentration cyanide-containing wastewater

A treatment method and treatment device technology, applied in chemical instruments and methods, water/sewage treatment, oxidized water/sewage treatment, etc., can solve problems such as complex components, difficult to achieve synchronous high-efficiency treatment, and high TCN concentration

Active Publication Date: 2021-08-20
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] Aiming at the defects of high concentration of TCN in cyanide-containing wastewater produced in chemical and pharmaceutical industries, and the presence of organic and inorganic cyanide at the same time, the composition is complex, and it is difficult to achieve synchronous and efficient treatment. The cyanide wastewater is treated by the synergistic effect of cathode and anode, and the OH produced by the anode is used to treat the inorganic CN - and the refractory organic heterocyclic rings are oxidized, and at the same time, the organic cyanides are reduced at the cathode and converted into inorganic CN - Close to the anode, so as to realize the organic cyanide and inorganic CN in high-concentration cyanide-containing wastewater - Synchronous and efficient removal of wastewater, while reducing COD and toxicity of wastewater, improving the biodegradability of wastewater, in addition, reducing operations during operation, which is convenient for automatic operation

Method used

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  • An electrochemical tubular treatment device and method for high-concentration cyanide-containing wastewater
  • An electrochemical tubular treatment device and method for high-concentration cyanide-containing wastewater
  • An electrochemical tubular treatment device and method for high-concentration cyanide-containing wastewater

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Embodiment 1

[0071] The tubular reactor device of this embodiment

[0072] figure 1 is the anode structure diagram of the tubular reactor device, figure 2 is the cathode 308 structural diagram of the tubular reactor device, image 3 It is the installation structure diagram of the tubular reactor device of the present invention, as Figure 1-Figure 3 As shown, the tubular reactor device includes an anode 305, a cathode 308, an inlet pipe 309 and an outlet pipe 303, the anode 305 is set inside the cathode 308, the inlet pipe 309 communicates with the cathode 308, and the outlet pipe 303 communicates with the anode 305 The anode 305 is a titanium-based metal oxide coated electrode, and the cathode 308 is a stainless steel cathode 308. The anode and the cathode 308 are coaxial and both have a tubular structure, and the distance between the anode 305 and the cathode 308 double tubes is 0.7-1.2 cm.

[0073] The bottom surface of the cathode 308 is installed on the base 311, and the top surf...

Embodiment 2

[0081] Adopt the high-efficiency electrochemical tubular equipment of the present invention to process the cyanide in the cyanide-containing chemical industry wastewater produced by pesticides, comprising the following steps:

[0082] Step 1, preparing a microporous titanium-based ruthenium dioxide anode, the preparation steps are as follows:

[0083] Step 1: Die-cast microporous titanium tubes with a particle size of 43-46 μm into a microporous titanium tube with a pore size of 3-5 μm. After installing the flange, place the tubular microporous titanium substrate in a solution of oxalic acid with a volume concentration of 20-50% and heat it for 60 ~100°C, maintain for 1-3 hours, rinse with deionized water for 3 times, and then soak in deionized water overnight;

[0084] The second step: configure the brushing liquid, configure the ruthenium trichloride isopropanol solution with a mass concentration of 15-20g / L, add 37% (mass concentration) hydrochloric acid according to the am...

Embodiment 3

[0096] Adopt the high-efficiency electrochemical tubular equipment of the present invention to process the cyanide in the cyanide-containing chemical industry waste water of rubber industry, comprise the following steps:

[0097] Step 1. Preparation of microporous titanium-based ruthenium dioxide anode

[0098] The first step: Die-cast microporous titanium tubes with a particle size of 43-46 μm into a microporous titanium tube with a pore size of 3 to 5 μm. After installing the flange, heat the tubular microporous titanium base in a 20 to 50% oxalic acid solution (volume concentration) 60-100°C, maintain for 1-3 hours, rinse with deionized water 5 times, and then soak in deionized water overnight;

[0099] The second step: configure the brushing liquid, configure 15-20g / L ruthenium trichloride isopropanol solution, and add 15-20mL / L37% hydrochloric acid (mass concentration) according to each liter of isopropanol, and stir for 24-48h;

[0100] Step 3: Use a brush to dip in the...

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Abstract

The invention discloses an electrochemical tubular treatment device and method applied to high-concentration cyanide-containing wastewater, belonging to the technical field of water resources treatment. The device includes an anode, a cathode, a water inlet pipe and a water outlet pipe, the anode is set inside the cathode, the water inlet pipe communicates with the cathode, the water outlet pipe communicates with the anode, the anode is a titanium-based metal oxide coated electrode, and the cathode For the stainless steel cathode. The invention realizes enhanced mass transfer for high-concentration cyanide and high-efficiency treatment of cathode and anode synergy, overcomes the defects of needing additional dosing in the actual treatment process of cyanide-containing wastewater, complex operation, high operating cost and easy residual secondary pollution, and can Widely used in electroplating, chemical, pharmaceutical and other industries wastewater.

Description

technical field [0001] The invention belongs to the field of water resources treatment, and in particular relates to an electrochemical oxidation tubular treatment device and system and its application in the electrochemical treatment of high-concentration cyanide-containing wastewater. Background technique [0002] With the development of economy and society, people's demand for products with cyanide as added value is increasing, which also leads to the increasingly complex composition of cyanide-containing wastewater. At the same time, in order to better protect people's health and safety, the country The discharge standards for various cyanides are also constantly improving, and higher environmental protection requirements are also put forward for enterprises that produce cyanide-containing wastewater. At present, the treatment methods widely used in industry include chlorine oxidation method, hydrogen peroxide oxidation method, Inco method, electrochemical method and so ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/461C02F1/72C02F101/12C02F101/36
CPCC02F1/4672C02F2101/12C02F2101/36C02F2201/46145
Inventor 王祎谷青青韩卫清魏卡佳沈锦优李健生孙秀云
Owner NANJING UNIV OF SCI & TECH
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