Deinking treatment method of mixed office waste paper

Abstract

The invention discloses a deinking treatment method of mixed office waste paper. The deinking treatment method comprises the following steps: step 1, dipping the waste paper in deionized water and then dewatering by squeezing; step 2, disintegrating and carrying out spin-drying to obtain paper pulp; step 3, putting the paper pulp in a refrigerator to balance moisture; step 4, preparing enzyme liquid; step 5, putting an appropriate amount of waste paper pulp into a glass container, putting the container in constant-temperature water bath, preserving heat for 45-50 minutes at the temperature of 50-55 DEG C, and stirring the waste paper pulp in the container by use of an automatic stirrer, adding water while stirring, stopping adding water until the concentration of the paper pulp is 4.5%-6.5%, and then stirring evenly, adding a deinking agent and the enzyme liquid and reacting for 15-20 minutes; deinking by virtue of flotation. According to the mode, the deinking treatment method of the mixed office waste paper has the advantages that the addition of chemicals such as sodium hydroxide and sodium silicate is avoided, and therefore, the contamination rate of wastewater can be reduced, and meanwhile, the cost can be saved and the environment can be protected.

Description

technical field [0001] The invention relates to a waste paper treatment method, in particular to a deinking treatment method for office mixed waste paper. Background technique [0002] Office waste paper is one of the main raw materials of the domestic deinking production line, and mixed office waste paper contains a considerable amount of electrostatic copy paper and laser printing paper, and the traditional chemical deinking method is difficult to achieve the desired effect in the recycling process. [0003] With the improvement of the utilization rate of deinkable waste paper in the world, the problems caused by the traditional chemical deinking method are increasingly exposed, such as the low deoiling rate of deinking and dust, and the COD in deinking wastewater meets High, high content of stickies, low pulp strength, high cost of factory wastewater treatment and biological treatment system, etc. Contents of the invention [0004] The technical problem mainly solved b...

AI Technical Summary

Problems solved by technology

[0002] Office waste paper is one of the main raw materials of the domestic deinking production line, and mixed office waste paper contains a considerable amount of electrostatic copy paper and laser printing paper, and the traditional chemical deinking method is difficult to achieve the desired effect in the recycling process

[0003] With the improvement of the utilization rate of deinkable waste paper in the world, the problems caused by the traditional chemical deinking method are increasingly exposed, such as the low deoiling rate of deinking and dust, and the COD in deinking wastewater meets High, high content of stickies, low pulp strength, high cost of factory wastewater treatment and biological treatment system, etc.