Method for reducing damage of waste-paper fibers in high-concentration pulping process
A waste paper fiber, high-concentration shredding technology, used in fiber raw materials, fiber raw material processing, papermaking, etc., can solve the problems of short secondary fibers, uncomfortable reuse, easy to destroy fibers, etc., to reduce damage and improve the effect. , the effect of good liquidity
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Embodiment 1
[0025] A method for reducing waste paper fiber damage during high-consistency pulping, comprising the following steps:
[0026] (1) The step of adding waste paper slurry, adding the waste paper slurry into the high-pressure chamber, and controlling the slurry concentration of the waste paper slurry; the slurry concentration of the waste paper slurry is controlled to be 10wt%-16wt%.
[0027] (2) In the first high-pressure puffing step, close the high-pressure chamber, control the water pressure in the chamber at 10-30MPa, stabilize the pressure for 8-12 minutes, and release the pressure instantly, so that the tissue of the plant fiber will be puffed due to the huge pressure change , the fibers are torn and fluffy, so that the fibrous tissue of the plant is destroyed, and the first puffed pulp is obtained;
[0028] (3) In the step of swelling the first expanded slurry, the first expanded slurry is transported to the stirring and mixing equipment through the delivery pipeline, th...
Embodiment 2
[0035] The main structure, principle and effect of this embodiment are the same as those of Embodiment 1, and will not be repeated here. The difference is that:
[0036](1) The step of adding waste paper slurry, adding the waste paper slurry into the high-pressure chamber, and controlling the slurry concentration of the waste paper slurry, and controlling the slurry concentration of the waste paper slurry to 10wt%-16wt%;
[0037] (2) In the first high-pressure puffing step, the steam pressure in the chamber is controlled at 10-30 MPa, the pressure is stabilized for 8-12 minutes, and the pressure is released instantly to obtain the first puffed slurry;
[0038] (3) In the step of swelling the first expanded slurry, the first expanded slurry is transported to the stirring and mixing equipment through the delivery pipeline, the internal temperature of the stirring and mixing equipment is controlled at 40°C to 50°C, and the ZnCl 2 The aqueous solution is added to the stirring and ...
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