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Papermaking wastewater advanced treatment and recycling device and method thereof

A technology for papermaking wastewater and advanced treatment, which is applied in processing wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. and other problems to achieve the effect of overcoming the unsatisfactory treatment effect, reducing treatment costs and reducing emissions

Inactive Publication Date: 2012-06-27
BOYING XIAMEN SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The purpose of the present invention is to provide a method based on nano Combination of catalytic electrolysis technology and membrane technology, low cost, high efficiency, making it a papermaking advanced wastewater treatment recycling device and method for recycling

Method used

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  • Papermaking wastewater advanced treatment and recycling device and method thereof
  • Papermaking wastewater advanced treatment and recycling device and method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] A method for purification, regeneration and recycling of 150 tons / day papermaking advanced treatment wastewater.

[0051] The measured indicators of the papermaking advanced treatment wastewater are shown in Table 1.

[0052] Table 1

[0053] serial number

project

unit

measured value

serial number

project

unit

measured value

1

COD Cr

mg / L

186

4

Chroma

80

2

SS

mg / L

90

5

pH

7.5

3

Turbidity

NTU

6

6

Conductivity

μS / cm

5200

[0054] The advanced papermaking waste water is input into the nano-catalyzed electrolytic tank 13 through the water pump 12 at a flow rate of 7.5T / h through the water pipe. When the system runs smoothly, it enters the buffer tank 14, and enters the filter tank 17 through the water pump 15 and valve 16 for filtration to remove the impurities in the water. Solid impurities, plankton...

Embodiment 2

[0063] Purification and recycling method of 3000 tons / day papermaking advanced treatment wastewater.

[0064] Described papermaking advanced treatment waste water is measured, and index is as shown in table 4:

[0065] Table 4

[0066] serial number

project

unit

measured value

serial number

project

unit

measured value

1

COD Cr

mg / L

109

4

Chroma

120

2

SS

mg / L

75

5

pH

7.5

3

Turbidity

NTU

6

6

Conductivity

μS / cm

3200

[0067]The advanced papermaking waste water is input into the nano-catalytic electrolytic tank 13 through the water pump 12 at a flow rate of 150T / h. When the system is running smoothly, the wastewater electrolyzed by the nano-catalytic electrolytic tank 13 enters the buffer tank 14, passes through the water pump 15 and the valve 16, and enters the The multimedia filter tank 17 filters and remo...

Embodiment 3

[0076] Purification and recycling method of 6000 tons / day papermaking advanced treatment wastewater.

[0077] The papermaking advanced treatment wastewater has been measured, and the indicators are as shown in Table 7:

[0078] Table 7

[0079] serial number

project

unit

measured value

serial number

project

unit

measured value

1

COD Cr

mg / L

234

4

Chroma

110

2

SS

mg / L

73

5

pH

7.5

3

Turbidity

NTU

6

6

Conductivity

μS / cm

3700

[0080] Wastewater from papermaking advanced treatment is input into the nano-catalyzed electrolytic tank 13 through the water pump 12 at a flow rate of 300T / h. The microfiltration filter tank 17 filters and removes solid impurities, plankton, bacteria and colloids in the water to obtain purified waste water.

[0081] The working voltage of nano-catalytic electrolysis is 98-100V, the ...

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Abstract

A papermaking wastewater advanced treatment and recycling device and a method thereof relate to the treatment of papermaking wastewater. The invention provides a papermaking wastewater advanced treatment and recycling device which combines the nanometer catalytic electrolysis technology with the membrane technology, has lower cost and higher efficiency and can recycle wastewater, and a method thereof. The papermaking wastewater advanced treatment and recycling device is provided with a nanometer catalytic electrolysis system, a membrane filtration separation system and a membrane cleaning regeneration system. The method of the invention comprises the following steps: papermaking wastewater is extracted by a water pump and introduced in a nanometer catalytic electrolysis tank to perform nanometer catalytic electrolysis, then the obtained water is introduced in a filtering tank for filtration to remove the solid impurities, plankton, bacteria and colloid in wastewater and obtain the purified wastewater; and the purified wastewater is filtered and separated by the membrane filtration separation system to obtain dialyzate and concentrated solution, wherein the dialyzate is used for recycling; and one part of the concentrated solution flows back to the nanometer catalytic electrolysis system and the other part is directly discharged.

Description

technical field [0001] The invention relates to the treatment of papermaking wastewater, in particular to a papermaking advanced wastewater treatment recycling device and method based on nano-catalyzed electrolysis technology and membrane technology. Background technique [0002] Pulping and papermaking wastewater refers to the cooking waste liquid (also known as black liquor and red liquor) produced by chemical pulping, the middle water produced in the pulp washing and bleaching process and the white water produced in the papermaking process. Generally, 1t of organic matter and 400kg of alkalis and sulfides are dissolved in black liquor for every 1t of sulphate pulp produced; about 900kg of organics and 200kg of oxides (calcium, magnesium, etc.) in the liquid. The discharge of waste liquid into rivers not only seriously pollutes water sources, but also causes a lot of waste of resources. The paper industry is a traditional large water user and one of the important sources...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/06C02F103/28
Inventor 张世文王峰黄丽芹纪锡和潘美萍
Owner BOYING XIAMEN SCI & TECH
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