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Rare-earth catalytic oxidation device and method for printing and dyeing wastewater

A rare earth catalysis and oxidation treatment technology, which is applied in textile industry wastewater treatment, oxidized water/sewage treatment, multi-stage water treatment, etc., can solve the problem of high operating costs and achieve the effect of expanding the scope of application

Active Publication Date: 2015-03-04
上海浦希环境科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 2. To achieve reuse after wastewater treatment to reduce the total amount of sewage discharge. The difficulty here is that the quality of recycled water must meet the process requirements, especially the color difference and color fastness. At the same time, there must be a small amount of concentrated wastewater after treatment. How to discharge it up to the standard? For example, membrane technology, ion exchange technology, etc. can completely treat wastewater to the reuse level, but the operating cost is relatively high. More importantly, these two methods are essentially separation methods, not treatment methods. There is no problem in the reuse of fresh water after separation. , but a certain amount of dope will inevitably be produced, which exceeds the discharge standard. How to further process it to meet the discharge standard is a difficult problem

Method used

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  • Rare-earth catalytic oxidation device and method for printing and dyeing wastewater

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Embodiment 1

[0024] Such as figure 1 Shown is a schematic diagram of a rare earth catalytic oxidation treatment device for printing and dyeing wastewater. The rare earth catalytic oxidation treatment device for printing and dyeing wastewater includes a reaction tank 1 in which a grid partition 2 and a grid partition 2 are provided. The lower aeration device 3 includes a polyethylene tube aeration rod with an outer diameter of 10 cm, an inner diameter of 6 cm, and an average pore diameter of 0.05 μm, and compressed air 7 is passed into the aeration device for aeration. The grid partition 2 is provided with a catalytic oxidation reaction bag; the side wall of the reaction tank 1 is provided with a water inlet 4 and a water outlet 5, and the water inlet 4 is located in the aeration device 3 and the grid partition 2 In between, the water outlet 5 is located above the catalytic oxidation reaction bag; the preparation method of the catalytic oxidation reaction bag is: take waste residue from a ra...

Embodiment 2

[0026] A printing and dyeing factory specializes in the production of export curtain fabrics. The pre-treatment and refining wastewater accounts for 8% of the total drainage. The average COD concentration is 10000mg / L, alkaline, pH 13-14, no need to adjust the pH value, directly input from the water inlet of Example 1 The aeration treatment is carried out in the rare earth catalytic oxidation treatment device for printing and dyeing wastewater, the aeration ratio is 20:1, the aeration reaction is 4h, and the volume ratio of mixed rare earth-iron-carbon catalytic oxidant and wastewater is 1:4. After the end, the pH automatically tends to 9-11, remove the printing and dyeing wastewater rare earth catalytic oxidation treatment device to another reaction tank, add XSD-1 accelerator (Shanghai Xisun Environmental Technology Co., Ltd.) 0.030wt%, aeration for 1 hour, use ordinary The coagulant separation of 100ppm basic aluminum chloride and 1ppm of anionic PAM coagulant can achieve COD...

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Abstract

The invention provides a rare-earth catalytic oxidation device and a rare-earth catalytic oxidation method for printing and dyeing wastewater. The rare-earth catalytic oxidation device for printing and dyeing wastewater is characterized by comprising a reaction tank, wherein a gridded clapboard and an aeration device which is arranged below the gridded clapboard are arranged in the reaction tank; a catalytic oxidation reaction ball or a catalytic oxidation reaction bag is arranged on the gridded clapboard; a water inlet and a water outlet are formed in the side wall of the reaction tank; the water inlet is positioned between the aeration device and the gridded clapboard; and the water outlet is positioned above the catalytic oxidation reaction ball or the catalytic oxidation reaction bag. The device disclosed by the invention has high COD (Chemical Oxygen Demand) removal rate on high-concentration refractory organic wastewater.

Description

Technical field [0001] The invention relates to a method for treating high-concentration, non-degradable and high-alkalinity organic wastewater in the textile dyeing and finishing industry, in particular to a variety of high-concentration wastewater suitable for desizing wastewater in the pH range of 13-14, scouring wastewater and a mixture of the two Non-degradable organic wastewater is treated directly without adjusting the pH value. Background technique [0002] my country is the largest textile country in the world, and its output has accounted for 60% of the world. The printing and dyeing industry in the textile industry is the most technical and indispensable intermediate industry, but it is also the industry with high energy consumption and the largest discharge of pollutants, especially wastewater. , In my country’s industrial industry, water pollution discharge is second only to the paper industry, ranking second, and one of the two major industries under the key control ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/74C02F9/04C02F9/14B01J23/83C02F103/30
CPCB01J23/002B01J23/83B01J2523/00C02F1/52C02F1/725C02F1/74C02F3/00C02F9/00C02F2103/30C02F2301/08B01J2523/17B01J2523/3712B01J2523/842
Inventor 奚旦立马春燕刘振鸿李晓阁
Owner 上海浦希环境科技发展有限公司
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