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Method of preparing pulp by deinking ONP/OMG mixed wastepaper blended with paper making white water

A technology for papermaking white water and waste paper deinking, which is applied in the field of papermaking and pulping, can solve the problems of high COD content, aggravated end treatment costs, and difficulty in making full use of workshops, and achieves improved whiteness, good economic and environmental benefits, and reduced The effect of production costs

Inactive Publication Date: 2009-04-15
福建省南平南纸有限责任公司
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Problems solved by technology

In addition, the process water in the waste paper deinking workshop has not been effectively treated, and it is difficult to make full use of it in the workshop, resulting in high COD content in the wastewater discharged from the deinking workshop, which increases the cost of terminal treatment

Method used

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  • Method of preparing pulp by deinking ONP/OMG mixed wastepaper blended with paper making white water
  • Method of preparing pulp by deinking ONP/OMG mixed wastepaper blended with paper making white water

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Embodiment Construction

[0020] Raw material: 70% #8 old newspaper (ONP) + 30% #10 old magazine paper (OMG), raw pulp whiteness 44.3% ISO, dustiness 1042mm 2 / m 2 . Add paper-making white water on the deinking production line, the amount of paper-making white water: 20 tons of white water / ton of deinked pulp. In the drum pulper, the conventional process conditions are adjusted: pH range: 10-11; slurry concentration 10-20%; pulping temperature 50-60°C. Then add the biological deinking agent of the present invention, the biological deinking agent can be selected from the existing biological deinking agent according to the waste paper quality, and the consumption is 0.09%~0.1% for pulp; The deinking agent can be selected from the existing chemical deinking agent according to the quality of waste paper, and the dosage is only 50% of that of the simple chemical deinking agent, and it is 0.5% to 0.8% for the pulp. Add chemical deinking agents to the pre-flotation tank and post-flotation tank in the subse...

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Abstract

The invention relates to a method for dipping pulping white water to void ONP / OMG mixed waste paper to produce pulp. The invention is characterized in that 1, using the white water in paper industry into whole void product line, 2, putting biological void agent and chemical void agent into drum pulper on the void product line, while the biological void agent is 0.09-0.1% and the chemical void agent is 0.5-0.8%, putting chemical void agent into pre-floating selecting groove and following floating selecting groove as 0.25-0.5% relative to the pulp, 3, adding alta-mud into white water pool as 5ppm. The invention can reduce clean water consumption, reduce dust and sewage discharge and discharge COD value, to improve white degree for 3-5% and void efficiency.

Description

technical field [0001] The invention relates to a method for blending into papermaking white water to deink ONP / OMG mixed waste paper into pulp, which is applied to papermaking and pulping. Background technique [0002] Due to resource, environment and energy issues, secondary fiber has become an important source of fiber in the pulp and paper industry worldwide. As one of the key technologies of waste paper recycling, the deinking pulping process has become a hot spot in the application and development of waste paper deinking production plants at home and abroad. [0003] At present, the waste paper deinking process is mainly based on chemical deinking, such as adding caustic soda, chemical deinking agent (fatty acid salt collector and surfactant), sodium silicate, EDTA and hydrogen peroxide. These chemicals are highly corrosive to equipment and will also increase the COD content of workshop wastewater. With the increasing complexity of waste paper types and ink formulati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21C5/02D21C11/00D21C3/22
CPCY02W30/64
Inventor 吴冰文林孝帮叶世城钟开才郑飞刘正誉陈德强
Owner 福建省南平南纸有限责任公司
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