Flexible pulping process for environment-friendly household paper

Abstract

The invention relates to a flexible pulping process for environment-friendly household paper. The flexible pulping process comprises a first assembly line; the first assembly line comprises the following steps that S1, a chain plate machine conveys raw materials to a first pulper; s2, adding a deinking chemical into the first pulper; s3, the paper pulp with the normal color is conveyed to a transition pool to be sterilized; s4, coarse impurities in the paper pulp are screened out through a cylinder; s5, after solid impurities are removed through a high-concentration sand remover, the paper pulp is conveyed. The problems that three or more sets of processing assembly lines are needed to process paper pulp, the mode has limitation, mixing processing is difficult, and the input cost of the assembly lines is too high are solved.

Description

Technical Field

[0001] The invention relates to the field of paper flexible pulping, and in particular to a green and environment-friendly flexible pulping process for household paper. Background Art

[0002] In the prior art, pulp molded products are a three-dimensional papermaking technology developed on the basis of paper and paperboard production processes. They mainly use natural plant fibers as raw materials, add other additives, use molds to process them into a predetermined shape, and then carry out finishing, functional and other treatments to make products. The raw materials of pulp molded products come from nature, and the waste after use can be recycled and reused, and it is degradable. It is a typical environmentally friendly green packaging product. Its application range has developed from egg trays, fruit trays, industrial product linings, food and drug packaging with relatively low requirements to high-precision instruments and meters, protective packaging for electronic products, and high-precision disposable lunch boxes. The preparation process of pulp molded products mainly includes pulping, pulp sizing, slurry mixing, paper mold forming, extrusion dehydration, paper mold drying, hot pressing shaping and trimming.

[0003] Currently, the waste paper on the market includes office waste paper, cup paper, natural pulp waste paper or others. The existing processing lines often require three or more groups to process them into pulp. This method has limitations, is difficult to mix and process, and the investment cost of the line is too high. Summary of the invention

[0004] The embodiment of the present application provides a green and environmentally friendly flexible pulping process for household paper, which solves the problem in the prior art that processing lines often require three or more groups to process it into pulp. This method has limitations, is difficult to mix, and has too high a cost for line investment.

[0005] The technical solution adopted in the embodiments of the present application is as follows.

[0006] A green and environmentally friendly flexible pulping process for household paper includes a first assembly line; the first assembly line includes the following steps: S1, a chain conveyor transfers the raw material to a first pulp breaker; S2, deinking chemicals are added to the first pulp breaker; S3, pulp with normal color is transferred to a transition pool for disinfection; S4, pulp is passed through a cylinder to screen out coarse impurities; S5, solid impurities are removed through a high-concentration desander and then the pulp is transferred.

[0007] As a further improvement of the above technical solution: comprising a second assembly line; the second assembly line comprises the following steps: S1, the chain conveyor transfers the natural raw material to the second pulp crusher; S2, the pulp is transferred after the solid impurities are removed by the high-concentration desander; S3, the pulp is transferred to the discharge tower; S4, the pulp is screened for coarse impurities;

[0008] S5, remove sand from pulp at low concentration; S6, fine screen pulp; S7, float pulp to prevent solid mixing; S8, concentrate pulp; S9, further peel off residual ink on fiber, and refine and evenly disperse impurities such as ink and adhesives contained in pulp; S10, store pulp after treatment.

[0009] As a further improvement of the above technical solution: S5 of the first assembly line further transfers the pulp to the discharge tower in S3 of the second assembly line.

[0010] As a further improvement of the above technical solution: in S2, the temperature in the first pulp breaker is 80°, and the action time is 25 minutes.

[0011] As a further improvement of the above technical solution: S2 further adds 8 ppm of decomposing enzyme and an acidic solution with a pH of 6.

[0012] As a further improvement of the above technical solution: in S4, the cylinder is a new type of rotary drum screen.

[0013] As a further improvement of the above technical solution: in S1, the raw materials are office waste paper and cup paper.

[0014] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0015] 1. The pulping line uses a set of high-concentration pulpers to process office waste paper or cup paper raw materials. If the office waste paper needs to be de-inked, relevant chemicals are added to the high-concentration pulper. The coarse impurities are screened by a cylindrical screen in the latter stage, and enter the unloading tower through high-concentration sand removal;

[0016] 2. Use another set of low-consistency pulpers to process natural waste pulp (similar to American waste pulp board or yellow board edge strips), and enter the unloading tower through high-consistency sand removal;

[0017] 3. The coarse screening system, low-concentration heavy sand removal system, fine screening system and thermal dispersion system can be selected to process the above raw materials at the same time, using the same process to achieve qualified raw materials with different properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the process of flexible pulping of green and environment-friendly household paper in the present invention. DETAILED DESCRIPTION

[0019] The embodiment of the present application provides a green and environmentally friendly flexible pulping process for household paper, which solves the problem in the prior art that processing lines often require three or more groups to process it into pulp. This method has limitations, is difficult to mix, and has too high a cost for line investment.

[0020] The technical solution in the embodiment of the present application is to solve the above problems, and the overall idea is as follows

[0021] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0022] A green and environmentally friendly flexible pulping process for household paper includes a first assembly line; the first assembly line includes the following steps: S1, a chain conveyor transfers the raw material to a first pulp breaker; S2, deinking chemicals are added to the first pulp breaker; S3, pulp with normal color is transferred to a transition pool for disinfection; S4, pulp is passed through a cylinder to screen out coarse impurities; S5, solid impurities are removed through a high-concentration desander and then the pulp is transferred.

[0023] It includes a second production line; the second production line includes the following steps: S1, the chain conveyor transfers the natural raw material to the second pulp crusher; S2, the pulp is transferred after the solid impurities are removed by a high-concentration desander; S3, the pulp is transferred to a discharge tower; S4, the pulp is screened for coarse impurities; S5, the pulp is desanded at a low concentration; S6, the pulp is finely screened; S7, the pulp is floated to prevent solids from mixing in; S8, the pulp is concentrated; S9, the pulp further strips off the residual ink that has not been stripped off the fiber, and the impurities such as ink and adhesives contained in the pulp are refined and evenly dispersed; S10, the pulp is stored after the treatment is completed.

[0024] S5 of the first assembly line further transfers the pulp to a discharge tower in S3 of the second assembly line.

[0025] In S2, the temperature in the first pulp breaker is 80° and the action time is 25 minutes.

[0026] S2: Further, 8 ppm of decomposing enzyme and an acidic solution with a pH of 6 are added.

[0027] In S4, the cylinder is a new type of rotary drum screen.

[0028] In S1, the raw materials are office waste paper and cup paper.

[0029] Temperature increase and chemical addition analysis comparison table (Table 1)

[0030]

[0031]

[0032] Efficiency comparison table of high-concentration pulper transition tank (Table 2)

[0033]

[0034] Comparison table of fiber yield of new drum screen (Table 3)

[0035]

[0036] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0037] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A green and environmentally friendly flexible pulping process for household paper, characterized in that: The invention comprises a first assembly line; the first assembly line comprises the following steps: S1. The chain conveyor transfers the raw materials to the first pulp breaker; S2. Deinking chemicals are added to the first pulp breaker; S3. The pulp with normal color is transferred to the transition pool for disinfection; S4. The pulp passes through the cylinder to screen out coarse impurities; S5. The pulp is transferred after the solid impurities are removed through the high-concentration desander.

2. The green and environment-friendly flexible pulping process for household paper according to claim 1, characterized in that: It includes a second production line; the second production line includes the following steps: S1, the chain conveyor transfers the natural raw material to the second pulp crusher; S2, the pulp is transferred after the solid impurities are removed by a high-concentration desander; S3, the pulp is transferred to a discharge tower; S4, the pulp is screened for coarse impurities; S5, the pulp is desanded at a low concentration; S6, the pulp is finely screened; S7, the pulp is floated to prevent solids from mixing in; S8, the pulp is concentrated; S9, the pulp further strips off the residual ink that has not been stripped off the fiber, and the impurities such as ink and adhesives contained in the pulp are refined and evenly dispersed; S10, the pulp is stored after the treatment is completed.

3. The green and environment-friendly flexible pulping process for household paper according to claim 2, characterized in that: S5 of the first assembly line further transfers the pulp to a discharge tower in S3 of the second assembly line.

4. The green and environment-friendly flexible pulping process for household paper according to claim 1, characterized in that: In S2, the temperature in the first pulp breaker is 80° and the action time is 25 minutes.

5. The green and environment-friendly flexible pulping process for household paper according to claim 4, characterized in that: S2: Further, 8 ppm of decomposing enzyme and an acidic solution with a pH of 6 are added.

6. The green and environment-friendly flexible pulping process for household paper according to claim 1, characterized in that: In S4, the cylinder is a new type of rotary drum screen.

7. The green and environment-friendly flexible pulping process for household paper according to claim 1, characterized in that: In S1, the raw materials are office waste paper and cup paper.

Images