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A method of recycling waste paper pulp

A waste paper pulp and paper pulp technology, which is applied in the field of waste paper pulp recycling, can solve the problems affecting quality and quality, poor mechanical properties of newsprint products, and high dustiness, so as to ensure quality and quality, improve deinking efficiency, and reduce pollution.

Active Publication Date: 2022-08-09
浙江金励环保纸业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, through the current process of making newsprint from waste paper pulp, the mechanical properties of the resulting newsprint product itself are relatively poor, and the dustiness is relatively high, which seriously affects its quality and quality.

Method used

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  • A method of recycling waste paper pulp

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A method for recycling waste paper pulp, comprising the following steps:

[0034] Step 1. Screening and removing impurities from waste paper pulp;

[0035] The waste paper pulp to be treated is transferred to high-concentration slag removal equipment for slag removal treatment, and then the pulp is transferred to coarse screen equipment for coarse filtration treatment; the pulp after coarse filtration is transferred to low-concentration slag removal equipment for low concentration Slag removal treatment, and then the obtained pulp is transferred to fine screening equipment for fine filtration treatment; the obtained screened and treated waste paper pulp is stored for future use;

[0036] Step 2, deinking of waste paper pulp;

[0037] The waste paper pulp treated in step 1 is transported to the deinking equipment, and the compound deinking agent with a weight of 0.5% of the waste paper pulp and an appropriate amount of compound enzyme preparation are respectively put in...

Embodiment 2

[0051] The main difference between this embodiment and Embodiment 1 is:

[0052] The dosage of the compound deinking agent is 1.5% of waste paper pulp; and it is compounded by sodium cocoyl methyl taurate and nonylphenol polyoxyethylene ether in a mass ratio of 1:1.2.

[0053] During deinking, the concentration of waste paper pulp was kept at 0.9 wt%, and its pH was adjusted to 6.5.

[0054] The waste paper pulp after flotation treatment was concentrated to a concentration of 6 wt%, and the amount of the functional modifier was 1.2% of the waste paper pulp.

[0055] When preparing newsprint, the amounts of rosin gum, aluminum sulfate and filler used were 1.3%, 6% and 10% by weight of the corresponding waste paper pulp, respectively.

[0056] The compound deinking agent is compounded by sodium cocoyl methyl taurate and nonylphenol polyoxyethylene ether in a mass ratio of 1:1.2.

[0057] The respective dosages of lipase, cellulase and amylase in the compound enzyme preparation a...

Embodiment 3

[0062] The main difference between this embodiment and Embodiment 1 is:

[0063] The dosage of the compound deinking agent is 2% of waste paper pulp; and it is compounded by sodium cocoyl methyl taurate and nonylphenol polyoxyethylene ether in a mass ratio of 1:1.5.

[0064] During deinking, the concentration of waste paper pulp was kept at 1.2 wt%, and its pH was adjusted to 6.8.

[0065] The waste paper pulp after flotation treatment was concentrated to a concentration of 7 wt%, and the amount of the functional modifier was 1.5% of the waste paper pulp.

[0066] When preparing newsprint, the amounts of rosin gum, aluminum sulfate and fillers used were 1.5wt%, 7% and 12% of the corresponding waste paper pulp, respectively.

[0067] The compound deinking agent is compounded by sodium cocoyl methyl taurate and nonylphenol polyoxyethylene ether in a mass ratio of 1:1.5.

[0068] The respective dosages of lipase, cellulase and amylase in the compound enzyme preparation are 0.8u...

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Abstract

The invention relates to the technical field of waste paper pulp recycling, in particular to a method for recycling waste paper pulp; in the present invention, waste paper pulp is used as a raw material, and the processes such as screening and removing impurities, deinking, flotation purification and performance enhancement are carried out in sequence. After that, dewatering, bleaching, beating, purifying and other processes are sequentially performed on the obtained waste paper pulp, and finally a finished newsprint product is prepared. The invention uses waste paper pulp as the raw material for preparing newsprint, realizes the recycling and reuse of waste materials, not only reduces the pollution to the environment, but also realizes the reuse of resources, which saves resources and reduces production costs; In the present invention, trimethylammonium acetolactone and organic acid are used as the raw materials for preparing the functional modifier, which improves the mechanical strength of the prepared newsprint to a certain extent; The performance is further improved to ensure the quality and quality of the prepared newsprint.

Description

technical field [0001] The invention relates to the technical field of waste paper pulp recycling, in particular to a method for recycling waste paper pulp. Background technique [0002] Papermaking is an important invention of the ancient Chinese working people. There are two forms: mechanism and manual. The mechanism is to continuously carry out on the paper machine, dilute the pulp suitable for the paper quality with water to a certain concentration, and initially dehydrate it in the wire part of the paper machine to form a wet sheet, which is then pressed and dehydrated, and then dried into paper. [0003] In the process of papermaking, waste paper pulp will inevitably be produced. Generally, waste paper pulp can be used for papermaking together with other paper pulps. The proportion of waste paper pulp will fluctuate up and down according to the quality of papermaking. In addition, waste paper pulp itself has various uses. For example: making newsprint is one of its ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H11/14D21D5/02D21C5/00D21C5/02D21H27/00D21H17/62D21H17/66D21H17/67
CPCD21H11/14D21D5/02D21C5/005D21C5/025D21C5/027D21H27/00D21H17/62D21H17/66D21H17/67Y02W30/64
Inventor 种道峰李彩鹏种法广罗飞张世忠夏瑜陈欢欢
Owner 浙江金励环保纸业有限公司