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A method and device for treating printing and dyeing wastewater by fenton oxidation using iron filings as an iron source

A printing and dyeing wastewater, oxidation treatment technology, applied in the direction of oxidation water/sewage treatment, chemical instruments and methods, special compound water treatment, etc., can solve the problems of a large amount of iron sludge, secondary pollution, unfavorable wastewater continuous treatment, etc.

Active Publication Date: 2022-04-26
BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual treatment of printing and dyeing wastewater, it is necessary to continuously add FeSO 4 After the reaction, a large amount of iron sludge will be produced, forming secondary pollution, which is not conducive to the continuous treatment of large amounts of wastewater

Method used

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  • A method and device for treating printing and dyeing wastewater by fenton oxidation using iron filings as an iron source

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Example 1, Fenton oxidation treatment of printing and dyeing wastewater using iron filings as an iron source

[0071] like figure 1 Shown is a schematic structural view of the device for the Fenton oxidation treatment of printing and dyeing wastewater using iron filings as the iron source in the present invention.

[0072] The design parameters of each component are as follows: the water inlet pipe a 1 is made of 304 stainless steel (anti-acid); the acid medicine tank 2 is made of phenolic resin-lined steel, and the design size is Φ20×20cm; the water pump a 3 is made of CN-7M (alloy 20) Type water pump, the pipeline where the water pump a 3 is located is made of 304 stainless steel; the size of the pH adjustment pool 7 is 50×50×50cm, and it is made of carbon steel for corrosion protection; Fe 2+ The main material of the dissolution tower 91 adopts glass fiber reinforced plastics (FRP), and the tower body is divided into 3 parts. The lower part of the tower is H=100cm, ...

Embodiment 2

[0075] experimental method:

[0076] The waste water enters through the water inlet pipe 1. Start the centrifugal pump to extract the H in the acid medicine tank 2 2 SO 4 , enter the pH adjustment pool through the pipeline mixer 4, open the stirring paddle 5, and adjust the H in real time according to the pH detector 6 2 SO 4 The amount of input is to ensure that the pH of the wastewater is stable as early as 2±0.2. The wastewater in the regulating tank enters the Fe through the centrifugal pump 2+ Stripping tower 9, at this moment, the H produced 2 Enter the air storage tank 10 through the air duct 11, and the contact time between the waste water and the iron filings filling layer depends on the experimental conditions. mixed Fe 2+ The waste water enters the Fenton reaction tower 9 through a centrifugal pump, from the H 2 o 2 Add H to the medicine tank 2 o 2 solution, and the stirring paddle 5 is turned on, and the residence time is determined through experiments a...

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Abstract

The invention discloses a method and a device for treating printing and dyeing wastewater by Fenton oxidation using iron filings as an iron source. The device includes a pH adjustment tank connected in sequence, Fe 2+ Dissolution tower, Fenton oxidation tower and sedimentation tank; wherein, the upper part of the pH adjustment tank is connected with water inlet pipe a and acid medicine tank; Fe 2+ The dissolution tower is along the direction from the lower part of the tower body to the middle part. The lower part of the tower body is provided with perforated plates, lower support layer, upper support layer and iron filings filling layer in sequence; connected; Fenton oxidation tower is connected with H 2 o 2 Medicine tank, the upper part of which is provided with an outlet pipe connected to the sedimentation tank; the water inlet pipe b of the Fenton oxidation tower is set at the same level as the outlet pipe; Equipped with sludge pipe. The present invention realizes Fe through iron filings 2+ Continuous input to meet the continuous treatment process of a large amount of wastewater; the iron element in the solution can effectively avoid Fe 2+ oxidized to Fe 3+ ; The hydrogen produced is recovered and used as energy.

Description

technical field [0001] The invention relates to a method and a device for Fenton oxidation treatment of printing and dyeing wastewater using iron filings as an iron source, and belongs to the technical field of wastewater treatment. Background technique [0002] The textile industry is a traditional pillar industry in my country, and textile printing and dyeing is one of the key industries for industrial pollution prevention and water conservation. Printing and dyeing is the post-processing process of textile products, and it is also the most polluting process in the textile industry. At present, my country's printing and dyeing enterprises mainly use wet processing technology with water as the medium. This type of method consumes a lot of water in the production process, and will discharge a large amount of highly chromatic and highly polluted organic wastewater. According to statistics, the discharge of printing and dyeing wastewater in the country is 3×10 6 ~4×10 6 m ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/72
CPCC02F1/725C02F2305/026
Inventor 孙迎雪刘晨吴毅晖潘国强胡洪营
Owner BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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