Method for reproducing antibacterial corrugated paper from high-salinity high-hardness waste paper sludge

Abstract

The invention discloses a method for reproducing antibacterial corrugated paper from high-salinity high-hardness waste paper sludge. Through a technical means of combining a physical method and a chemical method, the waste paper sludge is recovered and used for producing the corrugated paper with an antibacterial function, the sticker weight of waste paper fibers subjected to surface modificationis reduced by 2%, thus the difficulty level of dehydration during paper making of a paper machine is reduced, physical indexes of water absorption, ring crush and the like of the made paper are improved, paper breaking of the paper machine is reduced, the operating rate of the paper machine is improved, and no secondary pollution is caused for the environment; and primary corrugated paper obtainedthrough sizing treatment of the method already has very stable corrugated paper characteristics, has excellent extensibility, elastoplasticity, crack resistance, anti-permeability and weather resistance, can have effects of water prevention, seepage prevention and protection, and is prevented from being affected with damp, a water-resistant grade reaches an ISO 4 grade, and breeding of bacteria in the corrugated paper can be effectively avoided.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to a method for remanufacturing antibacterial corrugated paper from waste paper sludge with high salinity and high hardness. Background technique [0002] Domestic paper mills that produce high-strength corrugated base paper basically use domestic waste paper as the main production raw material. The wastewater generated during the pulping and papermaking process contains a large amount of fine fibers and fillers, which form a large amount of waste in the primary sedimentation tank. Sludge accounts for about 3% of paper production. Taking a high-strength corrugated paper machine with a daily output of 600 tons as an example, the absolute dry amount of sludge produced per day is 18 tons. How to deal with papermaking sludge has become an important issue for the paper industry to achieve clean production. aspect. [0003] At present, there are three main methods of sludge treatment...

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Problems solved by technology

[0004] First, the sludge is dried by a filter press and used to make bricks. This method requires drying of the sludge, which consumes a lot of energy, and produces waste water and waste gas during the production process, causing secondary pollution to the environment;

[0005] Second, the sludge is incinerated through an incinerator. Due to the large water content in the waste paper sludge, the large heat flux in the furnace, the long residence time of the fuel in the furnace, and the need to add a large amount of combustion aids, this method has energy consumption. Large, it will produce toxic chemicals and other disadvantages, the exhaust gas will pollute the atmosphere, and the residue after incineration needs to be landfilled, polluting the land;

[0006] Third, after screening, sterilization, deinking and other treatment steps, the papermaking sludge is used as a filler in the paper production process, but due to the long-term influence of a large number of fine fibers in the waste paper sludge Effect, the fiber has been modified, the fiber is sticky, it is difficult to dehydrate the paper machine, the physical indicators such as the water absorption and ring pressure of the copied paper are reduced, the paper machine breaks more, and the operating rate decreases

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