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Electrochemical oxidation device for advanced treatment of wastewater produced by amidoximation

A technology for production wastewater and advanced treatment, applied in water/sewage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problem of many by-products and intermediate products, long production process, and large amount of recycled materials And other problems, to achieve the effect of not easy to react, long service life, high mechanical strength

Inactive Publication Date: 2015-04-08
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, the production and demand of caprolactam have been continuously increasing. However, its production process is long, the amount of recycled materials is large, there are many by-products and intermediate products, and the wastewater has complex components, high toxicity, and high-concentration nitrogen-containing organic wastewater.
At present, enterprises generally use biological methods to degrade organic matter in water. The advantage of biological methods is that the operating costs are low, but the effect of treating wastewater containing biodegradable organic compounds is not obvious.

Method used

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  • Electrochemical oxidation device for advanced treatment of wastewater produced by amidoximation
  • Electrochemical oxidation device for advanced treatment of wastewater produced by amidoximation
  • Electrochemical oxidation device for advanced treatment of wastewater produced by amidoximation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] An electrochemical oxidation device for advanced treatment of amidoximation production wastewater, including a DC stabilized power supply (1), a constant current pump (2), a storage tank (3), an advanced oxidation pool (4), and a drainage storage tank ( 5), the storage tank (3) and the drainage storage tank (5) are respectively connected to the advanced oxidation tank (4), and a constant flow pump (2) is arranged between the storage tank (3) and the advanced oxidation tank (4), so The reaction pool is provided with an electrode array composed of an oxide anode of a titanium sheet substrate and a stainless steel cathode connected to a power supply. The oxide anode of the titanium sheet substrate is based on titanium, and its surface is provided with an intermediate layer and an oxide layer in sequence. The middle layer is SnO 2 and Sb 2 o 5 The mixed layer, the oxide layer is PbO 2 layer;

[0033] The stainless steel cathode is mesh-shaped.

[0034] The inner wall o...

Embodiment 2

[0041] An electrochemical oxidation device for advanced treatment of amidoximation production wastewater, including a DC stabilized power supply (1), a constant current pump (2), a storage tank (3), an advanced oxidation pool (4), and a drainage storage tank ( 5), the storage tank (3) and the drainage storage tank (5) are respectively connected to the advanced oxidation tank (4), and a constant flow pump (2) is arranged between the storage tank (3) and the advanced oxidation tank (4), so The reaction pool is provided with an electrode array composed of an oxide anode of a titanium sheet substrate and a stainless steel cathode connected to a power supply. The oxide anode of the titanium sheet substrate is based on titanium, and its surface is provided with an intermediate layer and an oxide layer in sequence. The middle layer is SnO 2 and Sb 2 o 5 The mixed layer, the oxide layer is PbO 2 layer;

[0042] The stainless steel cathode is mesh-shaped.

[0043] The inner wall of ...

Embodiment example 1

[0057] Implementation Case 1: Using the above-mentioned preparation method, the required anode is used to treat the production wastewater of a caprolactam ammoximation process in Shandong. The quality of the wastewater is: COD about 6400mg·L -1 , about 255mg·L ammonia nitrogen -1 , pH=11-13, through the design of the treatment tank volume 4L; anode area: 30cm 2 (two pieces), cathode area: 30 cm 2 (three pieces);

[0058] The device is first filled with 4L of waste water that has been adjusted to pH=3 (H 2 SO 4 Adjustment), power on under different conditions, first static treatment for 3 hours, to ensure that the 4L wastewater in the treatment pool is qualified, then turn on the constant flow pump, control the inflow and outflow flow and residence time, treat according to the following different conditions, take samples once an hour, and monitor For the COD and ammonia nitrogen of the water samples at the outlet of the pool, each test runs continuously, the COD of the effl...

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Abstract

The invention provides an electrochemical oxidation device for advanced treatment of wastewater produced by amidoximation. The device comprises a direct current stabilized voltage supply (1), a constant flow pump (2), a storage tank (3), an advanced oxidation tank (4) and a drainage storage tank (5), wherein an electrode array which is connected with the power supply and consists of an oxide anode of a titanium sheet substrate and a stainless steel cathode is arranged in the reaction tank. According to the electrode array consisting of the oxide anode of the titanium sheet substrate and the stainless steel cathode, organic matters in water are directly oxidized or directly mineralized by utilizing high potential and catalytic activity of the anode, the device has high oxidizing ability compared with a general chemical reaction, electrons are mainly taken as the reagents, and no other agents need to be added. With the adoption of the structure, the electrochemical oxidation device disclosed by the invention is wide in adaptability, convenient and flexible to operate, environment-friendly, easy and convenient to maintain and can continuously operate, and no oxidation reductant needs to be added.

Description

technical field [0001] The invention relates to the field of waste water treatment, in particular to an electrochemical oxidation device for advanced treatment of amidoximation production waste water. Background technique [0002] At present, the number and types of refractory organic compounds in wastewater are increasing day by day, and their harm is becoming more and more serious, which has become the focus of water pollution control. In recent years, the production and demand of caprolactam have been continuously increasing. However, its production process is long, the amount of recycled materials is large, and there are many by-products and intermediate products. The wastewater has complex components, high toxicity, and high-concentration nitrogen-containing organic wastewater. At present, enterprises generally use biological methods to degrade organic matter in water. The advantages of biological methods are low operating costs, but the effect of treating wastewater co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F1/467
CPCC02F1/46104C02F1/46109C02F1/4672C02F2001/46138C02F2101/38
Inventor 于萍彭瑞超罗运柏
Owner WUHAN UNIV
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