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Cyclic utilization method of dyeing and printing advanced treatment wastewater

A technology of advanced treatment and waste water circulation, applied in separation methods, water/sewage treatment, chemical instruments and methods, etc., can solve the problems of large investment in fixed assets, high cost of waste water regeneration, waste of water resources, etc., and reduce the cost of cleaning and regeneration , low cost, cost-saving effect

Inactive Publication Date: 2012-12-26
BOYING XIAMEN SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide a method based on nano The combination of catalytic electrolysis technology, submerged ultrafiltration technology and electrodialysis technology has low cost and high efficiency, making it a printing and dyeing advanced treatment wastewater recycling method for wastewater regeneration and recycling

Method used

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  • Cyclic utilization method of dyeing and printing advanced treatment wastewater
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  • Cyclic utilization method of dyeing and printing advanced treatment wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] 150 tons / day printing and dyeing advanced treatment wastewater purification regeneration and recycling method.

[0049] The measured indexes of the printing and dyeing advanced treatment wastewater are shown in Table 1.

[0050] Table 1

[0051]

[0052] After 150 tons of printing and dyeing advanced treatment wastewater is extracted by the water supply pump 12 at a flow rate of 7.5T / h, it is input into the nano-catalytic electrolysis machine 13, and the nano-catalytic electrolyzed water directly enters the sedimentation tank 14, and after precipitation, it enters the submerged ultrafiltration membrane system to remove solids in the water Impurities, plankton, bacteria, and colloids can be used to purify wastewater.

[0053] The working voltage of the nano-catalytic electrolysis is 8-9V, and the current intensity is 500-510A. The nascent chlorine [Cl], hydroxyl and nascent oxygen [O] produced by the nano-catalytic electrolysis can kill microorganisms in wastewater, ...

Embodiment 2

[0059] 3000 tons / day printing and dyeing advanced treatment wastewater purification regeneration and recycling method.

[0060] The indicators of the advanced printing and dyeing wastewater treatment are as shown in Table 4 after determination of the printing and dyeing advanced treatment wastewater:

[0061] Table 4

[0062]

[0063] After the printing and dyeing advanced treatment wastewater is extracted by the water supply pump 12 at a flow rate of 150T / h, it is input into the nano-catalysis electrolysis tank 13, and the nano-catalysis electrolysis water directly enters the precipitation tank 14, and after neutralization and precipitation, the ultrafiltration membrane system 22 removes solid impurities in the water. Plankton, bacteria, and colloids can purify wastewater.

[0064] Due to the low salt content of the printing and dyeing advanced treatment wastewater, first add industrial sodium chloride to adjust its salt content to 12.5‰, and then perform nano-catalytic e...

Embodiment 3

[0073] 6000 tons / day printing and dyeing advanced treatment wastewater purification regeneration and recycling method.

[0074] The indicators of the purification, regeneration and recycling device for advanced printing and dyeing wastewater treatment are shown in Table 7.

[0075] Table 7

[0076]

[0077] After the printing and dyeing advanced treatment wastewater is extracted by the water supply pump 12 at a flow rate of 300T / h, it is input into the nano-catalysis electrolysis tank 13, and the nano-catalysis electrolysis water directly enters the precipitation tank 14, and after precipitation, the solid impurities in the water are removed by the submerged ultrafiltration membrane system 22. Plankton, bacteria, and colloids can purify wastewater.

[0078] Said printing and dyeing advanced treatment wastewater has a low salt content, the working voltage of the nano-catalyzed electrolysis is 16-18V, and the current intensity is 3760-3800A. The nascent chlorine [Cl], hydro...

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Abstract

The invention relates to a cyclic utilization device of dyeing and printing advanced treatment wastewater and a method thereof. The cyclic utilization device contains a nanometer catalytic electrolysis system, an immersed ultrafiltration-membrane filtration separation system and an electrodialysis system which are connected in turn, wherein the dyeing and printing advanced treatment wastewater passes through the nanometer catalytic electrolysis system, the immersed ultrafiltration-membrane filtration separation system and the electrodialysis system in sequence to perform nanometer catalytic electrolysis, ultrafiltration and filtration, and electrodialysis treatment. The cyclic utilization device of the invention has the outstanding advantages that the recovery rate of water is high, the cost is low, the decoloring and deodorizing effects are good, the total discharge amount of wastewater chemical oxygen demand (COD) can be greatly reduced, the biological pollution of membrane can be eliminated, no secondary pollution is caused, the amount of sludge can be greatly reduced, the floor space is small, the quality of the reused water is high, the energy consumption is greatly reduced during the operation of the device, etc.

Description

technical field [0001] The invention relates to printing and dyeing wastewater treatment technology, in particular to a recycling method for advanced printing and dyeing wastewater treatment. Background technique [0002] The textile industry usually includes five major components: textile, printing and dyeing, chemical fiber, clothing and textile special equipment manufacturing. With the rapid development of the national economy, the printing and dyeing industry has also entered a period of rapid development. The level of equipment and technology has been significantly improved, and the production process and equipment have been continuously updated. The printing and dyeing enterprises have developed very rapidly. More than 2000. Printing and dyeing process refers to the general term for the physical and chemical treatment of various textile materials fibers, yarns, and fabrics during the production process, including the pretreatment, dyeing, printing and finishing proce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/06C02F1/461C02F1/44C02F1/469C02F103/30
Inventor 张世文
Owner BOYING XIAMEN SCI & TECH
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