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Method for preparing kraft liner cardboard paper by utilizing wastewater sludge

A technology of linerboard and waste water sludge, which is applied in the field of papermaking, can solve the problems of waste of fibers and fillers in sludge and high cost of solid waste reprocessing, and achieve reduced waste paper usage, high interlayer bonding, and maintenance The effect of retention

Inactive Publication Date: 2019-04-09
JIANGSU LEE & MAN PAPER MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main components of the sludge produced by wastewater treatment are fine fibers, fillers, organic matter, microorganisms, etc. After being filtered by a plate and frame filter press, it is sent to the power station for incineration. Although it can generate energy and save coal consumption, the solids produced after combustion The cost of waste reprocessing is high, and it also causes waste of fibers and fillers in the sludge

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A kind of method utilizing waste water sludge to prepare kraft liner linerboard, comprises the following steps:

[0029] Step 1. Precipitation treatment is carried out on the wastewater discharged from the factory, and the precipitated sludge is obtained and stored, and then purified sludge is obtained after purification treatment, which is used as a production raw material to prepare container board for standby;

[0030] Step 2. The purified sludge and waste paper pulp obtained in step 1 are mixed and beaten for use. During the mixing and beating process, an appropriate amount of wrapping agent is added at a uniform speed and mixed to obtain a mixture for use;

[0031] The mixed material obtained in step 3 and step 2 enters the flow delivery system, and retention aids and filter aids are added in the flow delivery system to ensure the retention rate of fine fibers and fillers, followed by forming, pressing, drying, calendering, Sizing produces the desired containerboar...

Embodiment 2

[0038] A kind of method utilizing waste water sludge to prepare kraft liner linerboard, comprises the following steps:

[0039] Step 1. Precipitation treatment is carried out on the wastewater discharged from the factory, and the precipitated sludge is obtained and stored, and then purified sludge is obtained after purification treatment, which is used as a production raw material to prepare container board for standby;

[0040] Step 2. The purified sludge and waste paper pulp obtained in step 1 are mixed and beaten for use. During the mixing and beating process, an appropriate amount of wrapping agent is added at a uniform speed and mixed to obtain a mixture for use;

[0041] The mixed material obtained in step 3 and step 2 enters the flow delivery system, and retention aids and filter aids are added in the flow delivery system to ensure the retention rate of fine fibers and fillers, followed by forming, pressing, drying, calendering, Sizing produces the desired containerboar...

Embodiment 3

[0048] A kind of method utilizing waste water sludge to prepare kraft liner linerboard, comprises the following steps:

[0049] Step 1. Precipitation treatment is carried out on the wastewater discharged from the factory, and the precipitated sludge is obtained and stored, and then purified sludge is obtained after purification treatment, which is used as a production raw material to prepare container board for standby;

[0050] Step 2. The purified sludge and waste paper pulp obtained in step 1 are mixed and beaten for use. During the mixing and beating process, an appropriate amount of wrapping agent is added at a uniform speed and mixed to obtain a mixture for use;

[0051] The mixed material obtained in step 3 and step 2 enters the flow delivery system, and retention aids and filter aids are added in the flow delivery system to ensure the retention rate of fine fibers and fillers, followed by forming, pressing, drying, calendering, Sizing produces the desired containerboar...

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PUM

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Abstract

The invention discloses a method for preparing kraft liner cardboard paper by utilizing wastewater sludge. The method takes sludge obtained by wastewater treatment as a production raw material and thesludge is combined with waste paper pulp according to a certain ratio to prepare cardboard paper; the use amount of waste paper is reduced and the cost is saved; and the prepared kraft liner cardboard paper has relatively high burst index and ring crush index and has high smoothness, a great interlayer binding force and long service life. According to the method for preparing the kraft liner cardboard paper by utilizing the wastewater sludge, the quality of finished-product paper can be ensured through adding the wastewater sludge, a covering agent and a retention aid, and a filter aid and the quality index reaches enterprise standards; and the operation efficiency of a paper machine reaches 98 percent or more, the retention rate of fine fibers and filler can be maintained and the paper has a wide application prospect.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to a method for preparing kraft liner liner paper from waste water sludge. Background technique [0002] Waste paper pulping and papermaking has a large amount of wastewater treatment sludge, which is generally 20%-30% of the output of finished paper. Whether the sludge is applied well or not has a very important impact on the cost of the finished product. At present, there are two main methods of sludge treatment in China, one is dehydrating with a filter press and transporting it to landfill, the other is transporting it to a power station for incineration after pressing a filter. Although these two methods are relatively mature and practical, there are still defects, mainly: (1) Landfilling sludge needs to occupy a large area of ​​land, and the odor generated by natural fermentation of sludge after landfill will be secondary Air pollution; (2) Burning sludge can only burn or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H11/14D21H17/01D21H21/10
CPCD21H11/14D21H17/01D21H21/10
Inventor 李文斌
Owner JIANGSU LEE & MAN PAPER MFG
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