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Method for improving net retention rate of regenerated fiber cultural paper

A retention rate and paper machine technology, applied in the field of waste paper papermaking, can solve the problems of large retention rate interference, low first-pass retention rate, and low waste paper utilization rate, so as to facilitate the operation rate, stability and retention of paper machines The effect of improving efficiency and reducing production cost

Inactive Publication Date: 2015-04-29
DONGGUAN NINE DRAGONS PAPER IND
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AI Technical Summary

Problems solved by technology

Although this method largely retains the fine fillers in the paper and improves the evenness of the paper, its retention rate is greatly disturbed by system anion garbage, its stability is poor, and the first-pass retention rate is still low, generally only Keep between 60~80%, the utilization rate of waste paper is still low

Method used

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  • Method for improving net retention rate of regenerated fiber cultural paper

Examples

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Comparison scheme
Effect test

Embodiment 1

[0042] A method for improving the retention rate of regenerated fiber cultural paper network, the method steps are as follows:

[0043] 1) Biological enzyme treatment

[0044] First, use a small flow metering pump to add biological enzyme 0.1kg / t paper to the 1.0m outlet of the double disc mill outlet of the waste paper deinking pulp line to carry out biological enzyme treatment on the waste paper pulp. The flow rate of the biological enzyme is 50ml / min. The temperature of waste paper pulp is controlled at <50°C, and the pH value of waste paper pulp is controlled at 7.0.

[0045] 2) Combined treatment of cationic polyaluminum chloride PAC and sticky matter control agent TEP

[0046] Use a small flow metering pump to add cationic polyaluminum chloride PAC 4.0kg / t paper to the entrance of the white water tank outside the paper machine at 0.5m, the flow rate of cationic polyaluminum chloride PAC is 1.0l / min, and then use a small flow metering pump Add sticky matter control agen...

Embodiment 2

[0050] A method for improving the retention rate of regenerated fiber cultural paper network, the method steps are as follows:

[0051] 1) Biological enzyme treatment

[0052] First, use a small flow metering pump to add biological enzyme 0.2kg / t paper to the outlet of the double disc mill of the waste paper deinking pulp line 1.0m to carry out biological enzyme treatment on the waste paper pulp. The flow rate of the biological enzyme is 70ml / min. The temperature of the waste paper pulp is controlled at <50°C, and the pH value of the waste paper pulp is controlled at 8.0.

[0053] 2) Combined treatment of cationic polyaluminum chloride PAC and sticky matter control agent TEP

[0054] Use a small flow metering pump to add cationic polyaluminum chloride PAC 5.0kg / t paper to the entrance of the white water tank outside the paper machine at 0.5m, the flow rate of cationic polyaluminum chloride PAC is 5.0l / min, and then use a small flow metering pump Add sticky matter control age...

Embodiment 3

[0058] A method for improving the retention rate of regenerated fiber cultural paper network, the method steps are as follows:

[0059] 1) Biological enzyme treatment

[0060] First, use a small flow metering pump to add biological enzyme 0.15kg / t paper to the 1.0m outlet of the double disc mill outlet of the waste paper deinking pulp line to carry out biological enzyme treatment on the waste paper pulp. The flow rate of the biological enzyme is 90ml / min. The temperature of waste paper pulp is controlled at <50°C, and the pH value of waste paper pulp is controlled at 7.5.

[0061] 2) Combined treatment of cationic polyaluminum chloride PAC and sticky matter control agent TEP

[0062] Use a small flow metering pump to add cationic polyaluminum chloride PAC 4.5kg / t paper to the 0.5m entrance of the white water tank outside the paper machine. The flow rate of cationic polyaluminum chloride PAC is 3.0l / min, and then use a small flow metering pump to feed Add sticky matter contro...

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Abstract

The invention discloses a method for improving net retention rate of regenerated fiber cultural paper. By adding a bio-enzyme+cationic poly aluminum chloride PAC+glue control agent TEP for combined treatment, most anionic trash in a paper machine system, particularly in a paper machine system which recycles waste paper pulp manufacturing cultural paper by 100% can be captured so as to play a role in an efficient cleaner of the paper machine system, and therefore, the paper machine system is stabilized and the retention rate is enhanced. By adopting the treatment method, the bottleneck that the retention rate is hard to enhance and the stability is poor due to interference of anionic trash when the waste paper pulp manufacturing cultural paper is recovered by 100% is directly broken through. The method not only has the characteristics of high net retention rate, controllability of the retention rate, good stability and the like, but also has good paper evenness of finished paper and dehydrating effect of the net.

Description

technical field [0001] The invention relates to the field of papermaking from waste paper, in particular to a method for improving the net portion retention rate of regenerated fiber cultural paper. Background technique [0002] In the waste paper and papermaking industry, especially in the field of 100% recycled waste paper secondary fiber papermaking, after repeated recycling of waste paper, its fibers become shorter and the loss rate increases, which reduces the net portion of fine fibers and waste paper fillers. The retention rate is not conducive to waste recycling and reuse, resulting in a waste of resources. In addition, there are more anionic garbage such as ink and stickies in the pulp system and paper machine system than in ordinary virgin pulp paper machine systems. These anionic garbage have a greater interference force on the paper machine system, further reducing the retention rate of the wire section. [0003] In the prior art, in order to improve the retenti...

Claims

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Application Information

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IPC IPC(8): D21H11/14D21H21/10D21H17/00
Inventor 刘名中林新阳傅国法颜利兵刘祥星
Owner DONGGUAN NINE DRAGONS PAPER IND
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