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Environmental protection waste paper deinking method

A deinking and environmental protection technology for waste paper, applied in the processing of waste paper, paper making, paper recycling, etc., can solve the problems of easy corrosion, accelerated ink particle removal, equipment damage, etc.

Inactive Publication Date: 2016-01-20
福建省晋江优兰发纸业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The use of biological enzymes to deink waste paper can not only reduce the consumption of chemicals in the waste paper recycling process, reduce environmental pollution, but also accelerate the removal of ink particles, but due to the limitations of biological enzymes, most biological enzymes need Biological activity can only be exerted in an alkaline environment or an acidic environment, and the equipment is easily corroded in an alkaline environment or an acidic environment, and the acidic or alkaline environment is easy to cause damage to the equipment and shorten its service life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A method for deinking environmentally friendly waste paper, comprising the following processing steps:

[0019] (1) Shredding waste paper: send waste paper and water into a pulper, the weight of water is 10 times the weight of waste paper, the water temperature is 50°C, and shred for 30 minutes to obtain shredded pulp;

[0020] (2) Coarse sieving: filter the shredded paper pulp processed in step (1) through a pressure coarse sieve, and the holes of the pressure coarse sieve are all Φ1.4mm;

[0021] (3) Fine sieve: pass the pulp processed in step (2) through a fine sieve, the sieve gap of the fine sieve is 0.14mm;

[0022] (4) Beating treatment: beating the pulp after fine sieving, adding hemicellulase during beating treatment, the amount of hemicellulase is 0.05% of the weight of the pulp, and reacting for 1.5h;

[0023] (5) Flotation: Send the finely sieved slurry into the flotation tank, add a deinking agent, and the deinking agent is composed of the following compon...

Embodiment 2

[0026] A method for deinking environmentally friendly waste paper, comprising the following processing steps:

[0027] (1) Shredding waste paper: send waste paper and water into a pulper, the weight of water is 11 times the weight of waste paper, the water temperature is 55°C, shred for 40 minutes, and get shredded pulp;

[0028] (2) Coarse sieving: filter the shredded paper pulp processed in step (1) through a pressure coarse sieve, and the holes of the pressure coarse sieve are all Φ1.4mm;

[0029] (3) Fine sieve: pass the pulp processed in step (2) through a fine sieve, the sieve gap of the fine sieve is 0.14mm;

[0030] (4) Beating treatment: the pulp after the fine sieving treatment is also subjected to beating treatment, and hemicellulase is added during the beating treatment. The amount of the hemicellulase is 0.08% of the weight of the pulp, and the reaction is 1.7h;

[0031] (5) Flotation: Send the finely sieved slurry into the flotation tank, add a deinking agent, a...

Embodiment 3

[0034] A method for deinking environmentally friendly waste paper, comprising the following processing steps:

[0035] (1) Shredding waste paper: send waste paper and water into the pulper, the weight of water is 12 times of the weight of waste paper, the water temperature is 60°C, shredding for 45 minutes to obtain shredded pulp;

[0036] (2) Coarse sieving: filter the shredded paper pulp processed in step (1) through a pressure coarse sieve, and the holes of the pressure coarse sieve are all Φ1.4mm;

[0037] (3) Fine sieve: pass the pulp processed in step (2) through a fine sieve, the sieve gap of the fine sieve is 0.14mm;

[0038] (4) Beating treatment: the finely sieved slurry is then subjected to a beating treatment, and hemicellulase is added during the beating treatment, and the amount of the hemicellulase is 0.1% of the weight of the slurry, and the reaction is 2 hours;

[0039] (5) Flotation: Send the finely sieved slurry into the flotation tank, add a deinking agent...

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Abstract

The invention relates to a deinking method, and provides an environmental protection waste paper deinking method. The method The method comprises the following processing steps: firstly, waste paper is crushed; secondly, coarse screening is carried out; thirdly, fine screening is carried out; fourthly, the slurry after fine screening processing is sent to a floating groove, a deinking agent is added, the deinking agent is composed of the following ingredients, by weight, 5-15 parts of fatty alcohol polyoxyethylene ether, 5-15 parts of aliphatic acid polyoxyethylene ether and 70-90 parts of neutral biological enzymes, the weight ratio of the deinking agent to the slurry is 5-10:90-95, and after the deinking agent is added, rotation is carried out for 15-20min at a rotating speed of 200-300r / min at a temperature of 30-40 DEG C; fifthly, the slurry after flotation is washed further.

Description

technical field [0001] The invention relates to a deinking method, in particular to an environmentally friendly waste paper deinking method. Background technique [0002] At present, the demand for fiber raw materials worldwide is increasing day by day. In addition to the need to save energy, recycling waste paper to make paper has attracted the attention of the paper industry at home and abroad. In addition to saving a lot of energy, plant fiber raw materials and reducing product costs, waste paper pulp , It can also save equipment investment costs and reduce environmental pollution, so the utilization of waste paper worldwide is expanding. Printing inks consist of carbon black or other pigment particles dispersed in drying oil, glue or resin. These particles adhere to the fibers through the printing process, while deinking is the opposite. It is necessary to add some chemicals to saponify and dissolve the above-mentioned adhesives under appropriate temperature and mechani...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C5/02
CPCY02W30/64
Inventor 曹旭李丽琴
Owner 福建省晋江优兰发纸业有限公司
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