(1) Reasonable use of recycled fiber
Regenerated fiber from different waste paper. The quality of the original slurry is very high. It should be good quality, medium quality and low quality. Can even try to achieve high quality. Used in low quality. Considering the use of recycled fiber, especially for large-scale recycled paper pulp mills or integrated paper mills, the use of recycled fiber can be completely achieved.

(2) It is necessary to reasonably classify or reasonably use the original paste

Some paper or cardboard. Can use 100% recycled fiber to make paper. For example, newsprint can be made from 100% old newspapers and recycled paper made from old magazines; cardboard and even whiteboard can also be made from 100% different recycled fibers. However, in many cases, because the characteristics of the recycled fiber will be somewhat different from that of the original fiber, a part of the original slurry is often used to improve the quality of the product.

(3) Reasonable choice of production process, production equipment and production process

According to the type of waste paper and different product varieties, different production processes are selected. It is required to simplify the production process to save equipment investment, run energy consumption and water consumption, and increase the yield of recycled fiber under the premise of meeting product quality requirements. For example, some new screening equipment can both classify and disperse fibers. In some production processes, classifiers, dispersers, and even lighter impurity removers can be omitted, which can greatly save equipment investment and operation. Energy consumption.

The choice of production equipment must first of all be closely linked to the choice of production process, but also the advanced nature of production equipment. For example, in the selection of waste paper disintegration equipment, in a certain scale of production plants, continuous disintegration equipment is selected to be better than intermittent disintegration equipment; and in the selection of continuous disintegration equipment, it is also considered that it is not appropriate to use long-term strong disintegration. Equipment, so as to avoid the difficulty of subsequent separation of ink. When selecting and purifying equipment, one machine should be selected as much as possible. For example, when using a concentrator with a disperser and a classifier, the amount of slag can be reduced, dust points can be reduced, and savings can be made. Electricity and saving the investment costs of the disperser. Secondly, the choice of flotation equipment can also consider advanced multi-stage new flotation equipment instead of multi-machine multi-stage flotation equipment, which can greatly save the number of equipment and energy consumption, but also greatly save the equipment Space.

The production process of each process in the production process should select advanced processes with theoretical basis. For example, what technology is used to disintegrate waste paper is most beneficial to the disintegration and subsequent deinking; when deinking, according to different flotation equipment, what process can be used to effectively save energy and improve flotation yield; when flotation pulp is bleached How to deal with the excessive decomposition of hydrogen peroxide, and how to deal with the adverse effects of fluorescent brighteners in waste paper, all of these should be applied to the actual situation of the plant to apply a new process to solve.

(4) Reasonable construction of deinking waste pulp pulp mill

In China, there is a deinking waste pulp production line with an annual output of more than 100,000 tons. The scale of foreign waste pulp production lines has reached an annual output of 350,000 tons. In addition to meeting the production needs of a large paper mill, the construction of large-scale waste paper pulp mills can also meet the production needs of other local paper mills. The big cities themselves are the centralized production base for waste paper. If they are added to the coastal areas and add some of the waste paper, it would be reasonable and beneficial to build large-scale waste paper pulp mills in certain regions or in some large cities. Of course, the production process, equipment and processes of the deinked pulp pulp production line must be carefully selected to meet various needs.

(5) Reasonable exploitation of deinking sludge

Deinking sludge is generally rich in cellulose fibers, fillers, etc., according to the specific circumstances, the development and application of technology, applied to fuel, paper filler, building board raw materials, soil conditioner.