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Printing and dyeing wastewater treatment method

A technology for printing and dyeing wastewater and treatment methods, which is applied in textile industry wastewater treatment, water/sewage treatment, neutralized water/sewage treatment, etc., and can solve the problems of high raw material input costs, difficulty in meeting discharge standards for printing and dyeing water, toxic substances and chromaticity Eliminate problems such as poor effect, achieve the effect of less investment, energy saving and consumption reduction, and improved effect

Active Publication Date: 2018-07-24
海宁华翔漂染科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, under the above methods, the removal effect of toxic substances and chroma in wastewater is poor, and the printing and dyeing water obtained after treatment is often difficult to meet the discharge standards, and the input cost of raw materials is very high.

Method used

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  • Printing and dyeing wastewater treatment method
  • Printing and dyeing wastewater treatment method
  • Printing and dyeing wastewater treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A printing and dyeing wastewater treatment method includes the following steps: (1) After the printing and dyeing wastewater undergoes heat exchange and heat treatment through a heat exchange device, it is passed into a regulating tank; the temperature of the printing and dyeing wastewater after heat exchange is 30°C; and then into the regulating tank Add acid-base regulator to adjust pH to 8.5 and COD to 300mg / L; specifically, acid-base regulator includes the following components by weight: 25 parts of citric acid, 2 parts of sodium hydroxide, and 1 of hydrochloric acid solution; (2) The waste water is passed into the reaction tank, and alkaline resin is added to the reaction tank. The reaction tank is a concrete tank, and the waste water is discharged after stirring and reacting for 1 hour; specifically, the alkaline resin is a strong alkaline anion exchange resin, after the reaction treatment The COD of the discharged wastewater is less than 50 mg / L, specifically 40 mg...

Embodiment 2

[0040] A printing and dyeing wastewater treatment method, including the following steps: (1) After the printing and dyeing wastewater is heat-exchanged through a heat exchange device, it is passed into a regulating tank; the temperature of the printing and dyeing wastewater after heat exchange is 35°C; and then to the regulating tank Add acid-base regulator to adjust pH to 9.5 and COD to 500mg / L; specifically, acid-base regulator includes the following components in parts by weight: 33 parts of citric acid, 4 parts of sodium hydroxide, 3 parts of hydrochloric acid solution; (2) The waste water is introduced into the reaction tank, and alkaline resin is added to the reaction tank. The reaction tank is a concrete tank, and the waste water is discharged after stirring and reacting for 2 hours; specifically, the alkaline resin is a strong alkaline anion exchange resin, after the reaction treatment The COD of the discharged wastewater is less than 50 mg / L; (3) Add phosphate substance...

Embodiment 3

[0042] A printing and dyeing wastewater treatment method includes the following steps: (1) After the printing and dyeing wastewater undergoes heat exchange and heat treatment through a heat exchange device, it is passed into a regulating tank; the temperature of the printing and dyeing wastewater after heat exchange is 30°C; and then into the regulating tank Add acid-base regulator to adjust pH to 8.5 and COD to 300mg / L; specifically, acid-base regulator includes the following components in parts by weight: 25 parts of citric acid, 4 parts of sodium hydroxide, and 1 of hydrochloric acid solution; (2) The waste water is introduced into the reaction tank, and alkaline resin is added to the reaction tank. The reaction tank is a concrete tank, and the waste water is discharged after the stirring reaction for 1.5 hours; specifically, the alkaline resin is a strong alkaline anion exchange resin, which has undergone reaction treatment The COD of the wastewater discharged afterwards is ...

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Abstract

The invention discloses a printing and dyeing wastewater treatment method. The method comprises the following steps: (1) after heat exchange treatment of printing and dyeing wastewater by a heat exchange device, introducing the wastewater into an adjusting tank to adjust the pH value to 8-8.5 and the COD to 300-500mg / L; (2) adding phosphate substances into the wastewater, and carrying out mixing to reaction for 4-6h; and (3) introducing the wastewater in step (2) into a hydrolysis acidification tank for reaction for 2-3h, and then introducing the water into a neutralization tank for neutralization reaction. According to the method provided by the invention, floras in the printing and dyeing wastewater are effectively removed through the coordination of pH value adjustment and acidificationhydrolysis, and then the COD content in the wastewater is effectively reduced, thereby achieving a good water treatment effect.

Description

Technical field [0001] The invention belongs to the technical field of printing and dyeing wastewater treatment, and particularly relates to a printing and dyeing wastewater treatment method. Background technique [0002] In the process of fabric printing and dyeing, a large amount of printing and dyeing wastewater will be produced, and this printing and dyeing wastewater needs to be treated before it can be discharged. Traditional treatment methods usually reduce the COD of wastewater through processes such as adsorption, filtration, coagulation, and biochemistry. However, in the above method, the removal effect of toxic substances and chromaticity in the wastewater is poor, the printing and dyeing water obtained after treatment is often difficult to meet the discharge standard, and the input cost of raw materials is high. Summary of the invention [0003] In order to overcome the shortcomings of the prior art, the present invention provides a printing and dyeing wastewater trea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F103/30
CPCC02F1/66C02F2103/30C02F1/42C02F2001/422C02F2303/04C02F2201/007C02F2201/002
Inventor 陈沛男
Owner 海宁华翔漂染科技有限公司
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