Effect Of Recycled White Water Quality On Papermaking

During papermaking process will produce a lot of white water, the water discharged from wire stable has high content fiber, called thick white water, can dilute the pulp of the paper machine, improve the quality of the paper, such as improving the uniformity, reduce the permeability and so on. Water from Vacuum suction box, suction couch roll, etc., called dilute white water, fiber content is small, can be sent to beating, washing and other sections or dilute the pulp. How much do you know the impact of recycling water quality on papermaking?

Effect Of Recycled White Water Quality On Papermaking

1. Recycled white water generally contains small fibers, fillers, compounds and other additives, when the high content of suspended solids, will increase the ash content of paper, thus affecting the strength of the paper.

2. Reuse white water after repeated recycling, a large number of microbiological breeding of water, easy to cause pulp system appears pulp block, pulp and pipe wall within the easy-ming fog microbial fall off after mixing into the pulp, resulting in paper holes and paper machine break

3. Due to the use of filler and other salts, white water calcium, magnesium ions increased, the hardness of water increased, hard water on the paper sizing adversely. For acidic sizing, because the water Ca2 +, Mg2 + will have the role of saponified rubber compound, form insoluble calcium soap and magnesium soap, resulting in rosin loss.

4. Whitewater reuse on paper dyeing is also great. On the one hand, since the white water contains a part of the toner, it is advantageous for the palette of the paper, and the stability of the white water reuse plays an important role in stabilizing the paper. Whitewater reuse on paper dyeing is also great. On the one hand, since the white water contains a part of the toner, it is advantageous for the palette of the paper, and the stability of the white water reuse plays an important role in stabilizing the paper. On the other hand, due to the increase in white water hardness, will reduce dyeing ability.

5. In the process of papermaking, due to the slurry has wood residue, resin acid, sizing agent, retention agent and other surfactants, white water produce a large number of foam, the gas in the white water will cause the paper machine fluctuate. At the same time is not conducive to the department of dirty water, the paper appears “eye” eventually affect product quality.

6. Paper white water reuse, is conducive to the stability of the wire slurry pH.

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