Treatment reuse technique for paper-making white-water

A papermaking white water and process technology, applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of small proportion of reused water, high operating costs, poor treatment effect, etc. Achieve the effect of stable water output, low operating cost and zero discharge

Active Publication Date: 2007-02-28
JIANGMEN CHUANYUAN ENVIRONMENT TECH CO LTD
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AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiencies of the prior art, the present invention provides a papermaking white water treatment and reuse process to overcome the shortcomings of the prior art that the treatment effect is poor and unstable, the proportion of reused water is small or not reused, and the operating cost is high.

Method used

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Embodiment Construction

[0013] The suspended solids (SS) content of wastewater generated during papermaking or pulping production is generally around 3500mg / L (6000mg / L in special cases). In order to remove suspended solids in papermaking or pulping wastewater, the present invention adopts the following process to treat it: A. send papermaking white water to primary treatment to remove most of the fibers and impurities in the white water; B. obtained after primary treatment The clear liquid is transported into the disc filter, and the effluent of the disc filter enters the papermaking system as production water; C. The disc filter is backwashed, and the backwash water is returned to the white water tank for initial treatment.

[0014] In this treatment process, the initial treatment includes one or more combinations of inclined plate or inclined tube sedimentation, air flotation and multi-disk vacuum filtration.

[0015] Among them, the inclined plate (inclined tube) is precipitated by adding polymer...

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Abstract

The invention discloses a recycling technology of paper making white water, which comprises the following steps: A. disposing white water to remove most of fiber and impurity; B. transmitting supernatant in the disc-typed filter to obtain the outlet water as producing water in the paper making system; C. backwashing the disc-typed filter to obtain the backwashing water in the white water pool to dispose continuously.

Description

technical field [0001] The invention relates to a wastewater treatment process, in particular to a papermaking white water treatment and reuse process. Background technique [0002] The waste water discharged from the wire and press parts of the paper machine during the sheet forming process of plant fiber wet papermaking is called papermaking white water, and papermaking white water is the main source of waste water in papermaking workshops. Papermaking white water is rich in lost fibers and various chemical additives added to inorganic fillers. The physical and chemical properties of papermaking white water vary greatly depending on the type of pulp, paper type of papermaking, paper machine type and equipment, and control of the wet end of the papermaking process. Generally speaking, the soluble COD and BOD indicators of papermaking white water are low, respectively in the range of 300-800mg / L, the content of suspended solids is high, and the difference is also large, in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/02
Inventor 臧立新
Owner JIANGMEN CHUANYUAN ENVIRONMENT TECH CO LTD
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