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Method for using papermaking sludge as papermaking filler

A papermaking sludge and papermaking filler technology, which is applied in chemical instruments and methods, papermaking, papermaking machines, etc., can solve the problems of difficult to meet the effective treatment of bulk papermaking sludge, secondary pollution of resources, occupation of land, etc., and achieve retention rate. The effect of high, large amount of sludge and strong operability

Inactive Publication Date: 2016-12-07
SHAANXI UNIV OF SCI & TECH
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  • Claims
  • Application Information

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Problems solved by technology

The traditional disposal methods for papermaking sludge include landfill, incineration, and ocean disposal. These methods generally have problems such as land occupation, secondary pollution, and waste of resources, so they are difficult to be recognized.
Using the composition characteristics of organic biomass and minerals in the solids of papermaking sludge, the comprehensive utilization of papermaking sludge in the fields of land use, energy and materials is a field of research in recent years, but these methods are economically reasonable. There are still many problems in terms of safety, soil and atmospheric environment safety, operability and treatment scale, and it is difficult to meet the requirements for effective treatment of bulk paper sludge in the industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: in the step (3), the treated sludge is reused with 6%, 8%, and 10% consumption (to the absolute dry pulp quality) to be used by producing quantitatively 100~140g / m with waste and old corrugated box pulp 2 During the corrugated base paper process, the water drainage of the wet paper sheet forming process will be improved to a certain extent. At the same time, the paper’s transverse ring pressure index is ≥7.5N m / g, the longitudinal fracture length is ≥4.5Km, the water absorption is ≤100, and the moisture ( 8.0±2.0)%, in line with the provisions of the national standard GB / T 13023-2008 for Class A products.

Embodiment 2

[0030] Embodiment 2: in the step (3), the treated sludge is reused with 8%, 10%, and 12% consumption (to the absolute dry pulp quality) to be reused by producing quantitatively 200~300g / m 2 During the container board process, the water drainage of the wet paper sheet forming process will be improved to a certain extent. At the same time, the paper transverse ring pressure index≥8.5N·m / g, burst index≥2.7kPa·m 2 / g, moisture (8.0±2.0)%, in line with the provisions of the national standard GB / T 13024-2003 for first-class products.

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Abstract

The invention discloses a method for using papermaking sludge as papermaking filler. The method includes the steps that 1, the raw material sludge is subjected to sterilization and deodorization with an oxidizing agent and a sterilization and deodorization agent first; 2, the concentration of the sterilized and deodorized sludge is regulated to be 2.0%-5.0% with water for clean production, the sludge is fully dispersed in a stirring tank with the rotating speed of 300-500 rmp, sludge slurry with a uniform concentration is obtained, and the sludge slurry is treated with a vibrating slotted screen and a vibrating mesh screen to remove large impurities in the sludge slurry; 3, a conditioner with the dosage being 4.0-6.0% the mass of wastewater dry sludge in the step 2 is added into the sludge slurry obtained in the step 2, and the conditioner and the sludge slurry are mixed evenly; 4, the sludge slurry obtained in the step 2 is placed at a proper position between a paper machine headbox and a fan pump; 5, papermaking is completed with a conventional papermaking technology. The method has the advantages that the sludge dosage is large, the retention rate in paper webs is high, and the physical strength performance of paper is good, and papermaking enterprises can reasonably treat papermaking sludge with a papermaking method more easily.

Description

【Technical field】 [0001] The invention relates to the technical field of comprehensive utilization of pulping and papermaking wastewater sludge, in particular to a method for utilizing papermaking sludge as a papermaking filler. 【Background technique】 [0002] Reasonable disposal of papermaking sludge is an important measure for the papermaking industry to achieve clean production. Papermaking sludge is a kind of sludge waste generated in the process of pulping and papermaking, and wastewater sludge is a common waste faced by all papermaking enterprises. The traditional disposal methods for papermaking sludge include landfill, incineration, and ocean disposal. These methods generally have problems such as land occupation, secondary pollution, and waste of resources, so they are difficult to be recognized. Using the composition characteristics of organic biomass and minerals in the solids of papermaking sludge, the comprehensive utilization of papermaking sludge in the field...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00C02F11/02D21F1/00D21F3/00D21F5/00
CPCC02F11/00C02F11/02D21F1/00D21F3/00D21F5/00
Inventor 韩卿张拓
Owner SHAANXI UNIV OF SCI & TECH
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