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Ultrafiltration device for processing papermaking wastewater and application method thereof

An application method and technology for wastewater, applied in the field of water treatment, can solve the problem of waste of valuable materials, and achieve the effects of high content of useful substances, high membrane flux, and low turbidity

Inactive Publication Date: 2014-03-26
北京清大国华膜科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the problem that valuable substances are wasted in the existing coagulation, biochemical and other treatment processes of papermaking wastewater

Method used

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  • Ultrafiltration device for processing papermaking wastewater and application method thereof

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Effect test

Embodiment 1

[0060] The waste water in the tobacco flake manufacturing process section of a certain papermaking method is treated by the small-aperture roll-type ultrafiltration membrane of the present invention. The ultrafiltration device adopts one-stage and two-stage treatment. The water production rate of the ultrafiltration membrane is above 70%, and the treatment effect is As shown in Table 1:

[0061] Table 1 Effect of ultrafiltration treatment of papermaking wastewater

[0062] project unit System water Ultrafiltration product water Concentrate pH —— 5~6 —— —— COD mg / L 3000~6000 ≤80 ≥50000 NH 3 -N mg / L 10~150 ≤10 ≥150 SS mg / L 900~3500 ≤70 ≤70 SO 4 2- mg / L ≥100 ≤50 ≥250 Chroma times 1500~5000 ≤50 ≥5000

Embodiment 2

[0064] Tobacco flake comprehensive wastewater produced by a certain papermaking method is processed by the small-aperture roll-type ultrafiltration membrane of the present invention. The ultrafiltration device adopts one-stage one-stage treatment, and 60% of the ultrafiltration concentrated water is returned to before the ultrafiltration. The treatment effect is as follows: Table 2 shows:

[0065] Table 2 Treatment effect of papermaking wastewater by ultrafiltration

[0066] project unit System water Ultrafiltration product water Concentrate pH —— 4~6 —— —— COD mg / L ≥2300 ≤80 ≥20000 TN mg / L ≥7.2 ≤1.5 ≥20 SS mg / L ≥868 ≤30 ≤50 TP mg / L ≥3.5 ≤0.5 ≥8 Chroma times ≥244 ≤50 ≥1000

Embodiment 3

[0068] The papermaking wastewater of a certain tobacco company is processed through the papermaking wastewater ultrafiltration treatment device of the present invention and its application method, and the treatment effect is as shown in table 3:

[0069] Table 3 Treatment effect of papermaking wastewater by ultrafiltration

[0070] project unit System water Ultrafiltration product water Concentrate pH —— 6.4 —— —— COD mg / L ≥2400 ≤76 ≥20000 Conductivity μs / cm ≥771 ≤150 ≥1630 TN mg / L ≥1.5 ≤0.5 ≥5.0 Chroma times ≥100 ≤50 ≥1000

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Abstract

The invention proposes an ultrafiltration device for processing papermaking wastewater and an application method thereof. The wastewater of a papermaking process section of a tobacco sheet manufactured by adopting a paper-making process is treated by employing a small-aperture rolled ultrafiltration membrane separation technology, useful substances in the wastewater are concentrated while being purified, and the concentrated liquor can be reused in the papermaking process section, so that the papermaking efficiency is improved, and the problem that the useful substances in the existing treatment technologies such as coagulation, biochemistry and the like of the papermaking wastewater are wasted is solved. The ultrafiltration device for processing the papermaking wastewater comprises a pretreatment tank, a coarse filter tank, an ultrafiltration device body, a concentrating tank and a water producing tank; the coarse filter tank is communicated with the pretreatment tank, and used for coarsely filtering the pretreated wastewater; the ultrafiltration device body is communicated with the filter tank, and used for processing and concentrating the wastewater; the concentrating tank is communicated with a thick water outlet of the small-aperture rolled ultrafiltration device, and used for storing the concentrated liquor containing useful substances; and the water producing tank is communicated with a water producing outlet of the small-aperture rolled ultrafiltration device and used for storing ultrafiltration water.

Description

technical field [0001] The invention relates to the field of water treatment, in particular to an ultrafiltration device for treating papermaking wastewater and an application method thereof. Background technique [0002] Papermaking wastewater refers to the wastewater generated in the papermaking section of the pulp and papermaking and papermaking tobacco sheet production process. Our country is a big tobacco planting country. Every year, a certain amount of low-grade tobacco cannot be purchased. In addition, a large number of tobacco rods are discarded as waste in tobacco factories. Tobacco sheets made by papermaking can regenerate valuable components in the waste. Use, such as nicotine, solanesol, sugars and so on. Tobacco sheet is reconstituted tobacco leaf, which is a cigarette sheet produced by using discarded tobacco stems and tobacco powder in cigarette production. After shredding, it is mixed with other shredded tobacco to reduce the tar content in cigarettes and r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/44B01D61/18B01D61/16C02F103/28
Inventor 陈福泰
Owner 北京清大国华膜科技有限公司
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