CN114134740A - Waste paper deinking regenerated cultural paper and manufacturing method thereof - Google Patents

Waste paper deinking regenerated cultural paper and manufacturing method thereof Download PDF

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Publication number
CN114134740A
CN114134740A CN202111394013.8A CN202111394013A CN114134740A CN 114134740 A CN114134740 A CN 114134740A CN 202111394013 A CN202111394013 A CN 202111394013A CN 114134740 A CN114134740 A CN 114134740A
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China
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block
driving
waste paper
magnetic
air
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CN202111394013.8A
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CN114134740B (en
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赵磊
王勇
石忠收
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Wuzhou Special Paper Industry Jiangxi Co ltd
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Zhangzhou Wuzhou Special Paper Co ltd
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
    • D21B1/30—Defibrating by other means
    • D21B1/32—Defibrating by other means of waste paper
    • D21B1/325—Defibrating by other means of waste paper de-inking devices
    • D21B1/327—Defibrating by other means of waste paper de-inking devices using flotation devices
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
    • D21B1/30—Defibrating by other means
    • D21B1/34—Kneading or mixing; Pulpers
    • D21B1/345—Pulpers
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
    • D21C5/02—Working-up waste paper
    • D21C5/025—De-inking
    • D21C5/027—Chemicals therefor
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
    • D21D5/02—Straining or screening the pulp
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
    • D21H11/14—Secondary fibres
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/64—Paper recycling

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Toxicology (AREA)
  • Paper (AREA)

Abstract

The invention discloses waste paper deinking regenerated cultural paper and a manufacturing method thereof, belonging to the field of papermaking. A method for manufacturing waste paper deinking recycled cultural paper comprises the following steps: s1, material preparation: mixing the waste paper with water to form waste paper pulp; s2, pulping: defibering the waste paper into fibers, and dispersing the flaky ink particles; s3, purifying: removing large particle impurities separated in the pulping process; s4, flotation: stickness impurity gathers and is scraped by the scraper blade on waste liquid thick liquids upper strata, and S5 is concentrated: concentrating waste paper pulp, and S6, thermally dispersing: feeding the concentrated and heated waste paper pulp into a heat dispersion machine; s7, bleaching: introducing the waste paper pulp into a bleaching tower; s8, paper making: regeneration of cultural paper; the automatic adjustment of the size of the bubbles and the automatic adjustment of the occurrence frequency of the bubbles with various sizes can be realized when sticky impurities are removed by flotation of waste paper pulp, and the removal of sticky substances with various sizes in the pulp is effectively ensured.

Description

Waste paper deinking regenerated cultural paper and manufacturing method thereof
Technical Field
The invention belongs to the field of papermaking, and particularly relates to waste paper deinking recycled cultural paper and a manufacturing method thereof.
Background
In the process of waste paper deinking regeneration, deinking is an important link.
The flotation method is a method for separating by utilizing the different wettability of fibers, fillers, printing ink and the like and applying the mechanism that different particles have different surface properties; in this process, hydrophobic particles or particles which are converted from hydrophilic to hydrophobic by means of a surfactant are adsorbed on air bubbles in the pulp suspension, float upwards and are separated from the pulp. Because viscous impurities are always bonded on the fibers and mainly comprise ink particles, the flotation method collects the ink particles by virtue of bubbles; as the ink-carrying bubbles rise to the surface of the liquid, a foam layer is formed and removed by flooding, mechanical means or vacuum suction.
The most important influencing factor of the flotation method is the size and the number of air bubbles. Generally, small air bubbles can capture small particles of waste impurities, while large air bubbles can capture larger particles of waste impurities by adsorption. The collision probability between the air bubbles and the waste impurity particles is improved as much as possible, so that the number of the air bubbles is increased appropriately by combining the actual situation of the impurity particles; according to practical experience, the diameter of the air bubbles needs to be reasonably controlled to be more than 0.5mm, because the air bubbles below 0.5mm are easy to be adsorbed with the fibers, so that the fibers are lost. The air bubbles with the diameter of more than 0.5mm have enough buoyancy, so that the air bubbles can successfully float to the surface of the flotation tank and smoothly adsorb ink on the surface. Therefore, the core of the flotation method is to control the size and the quantity of air bubbles so as to reasonably control the adsorption effect of the ink.
However, the ink particles in the waste paper pulp cannot be directly detected to know the specific amount of the ink particles, and the amount of the bubbles cannot be effectively controlled; meanwhile, the bubbles need to pass through the air holes, air passes through the air holes to generate bubbles, the sizes of the bubbles are related to the sizes of the air holes, the common air holes are fixedly arranged, and the bubbles with certain sizes are always generated at a certain position, so that ink particles are not completely removed.
Disclosure of Invention
The technical problem to be solved by the invention is to provide the waste paper deinking recycled cultural paper and the manufacturing method thereof, which can realize the automatic adjustment of the size of bubbles and the automatic adjustment of the generation frequency of bubbles with various sizes when sticky impurities are removed by flotation of waste paper pulp, and effectively ensure the removal of sticky substances with various sizes in the pulp.
The invention relates to a method for manufacturing waste paper deinking recycled cultural paper, which comprises the following steps:
s1, material preparation: mixing the waste paper and water to form waste paper pulp, wherein the concentration of the waste paper pulp is 23-25%;
s2, pulping: placing the waste paper pulp in a hydrapulper, and adding a silicon deinking agent to untwist the waste paper into fibers, dispersing the flaky ink particles, and separating large-particle impurities from the fibers;
s3, purifying: placing the waste paper pulp after pulping in a high-concentration slag separator, a low-concentration slag separator, a composite coarse screening machine, a coarse pulp tower and a heavy slag separator, and removing large-particle impurities separated in the pulping process;
s4, flotation: the method comprises the steps of introducing air bubbles and a surfactant into purified waste paper pulp to change sticky impurities bonded on fibers into hydrophobic particles, adsorbing the hydrophobic particles by the air bubbles, finally gathering the particles on the upper layer of the waste paper pulp and scraping the particles by a scraper, and controlling the size of the air bubbles and the introduction amount of the air bubbles with different sizes according to the amount of the sticky impurities in the waste paper pulp during flotation;
s5, concentrating: concentrating waste paper pulp to 25-35% dryness, and heating to 90-110 ℃ by using saturated steam;
s6, thermal dispersion: the concentrated and heated waste paper pulp is introduced into a heat dispersion machine, and hot melt substances stuck on the waste paper are separated from the fibers under the mechanical action by utilizing the strong friction action among high-concentration fibers, are dispersed into tiny particles, are uniformly dispersed in the middle of the fibers, and remove impurities;
s7, bleaching: introducing the waste paper pulp into a bleaching tower, and bleaching by using hydrogen peroxide, sodium sulfate and formamidine sulfinic acid;
s8, paper making: and introducing the waste paper pulp into a paper making system to regenerate the cultural paper.
As a further improvement of the invention, the waste paper pulp is introduced into a flotation barrel during flotation, a main shaft is arranged in the flotation barrel, and fan blades and a driving unit are arranged on the periphery of the main shaft; the bottom of the flotation barrel is provided with a through air hole which is communicated with the air pump and used for introducing air into the flotation barrel, and the air forms bubbles after entering the flotation barrel through the air hole; an interference unit is arranged in the flotation barrel, and the caliber of the air hole can be reduced after the interference unit is driven by external force; after the driving unit is abutted against the interference unit, the driving unit drives the interference unit to move towards the air hole.
As a further improvement of the invention, the air holes are provided with a plurality of air holes which are uniformly distributed relative to the circumference of the axis of the main shaft;
the interference unit comprises a cam, the cam is positioned on the inner bottom wall of the flotation barrel, one end of the cam is rotationally connected with the inner bottom wall of the flotation barrel, the other end of the cam is a movable end, the rotation of the cam has self-return performance, and the number of the cams corresponds to the number of the air holes; the cam is positioned on the inner side of the axis of the spindle relative to the air hole, and the rotating range of the movable end of the cam is overlapped with the area of the outlet of the air hole part;
the driving unit comprises abutting blocks, the number of the abutting blocks corresponds to the number of the air holes, the abutting blocks are evenly distributed relative to the axis circumference of the main shaft, the abutting blocks are arc-shaped, and the abutting blocks are fixedly connected with the main shaft through connecting rods;
when the main shaft rotates around the axis of the main shaft, the abutting block rotates around the axis of the main shaft, and in a free state, the movable end of the cam is positioned in the rotating range of the abutting block;
after the movable end of the cam is abutted to the abutting block, the movable end rotates towards the air hole direction and covers a part of the air hole, so that the caliber of the air hole is reduced.
As a further improvement of the invention, the inner bottom wall of the flotation barrel is provided with a plurality of layers of air outlet rings, each layer of air outlet ring comprises a plurality of uniformly distributed air holes, and the plurality of layers of air outlet rings are distributed in a plurality of concentric circles; the concentric circles are coaxial with the main shaft;
the abutting blocks have various specifications, the connecting rods of the abutting blocks with different specifications have different lengths, and the specification number corresponds to the number of the layers of the air outlet ring; the movable range of the abutting block of each specification covers the position of the movable end of the cam in the corresponding air outlet ring in a free state.
As a further improvement of the invention, each air hole is correspondingly provided with an electromagnetic valve, the electromagnetic valves are controlled by a controller arranged outside, and each electromagnetic valve is independently controlled; firstly, opening the air hole of a certain layer of air outlet ring, observing the air bubbles on the upper layer of the waste paper pulp, and observing the elapsed time from the beginning of carrying ink to the end of carrying no ink; according to the length of the elapsed time, the ink is divided into three grades of a multi-ink type, a medium-ink type and a low-ink type; the generation amount of bubbles of three grades of a multi-ink type, a medium-ink type and a low-ink type is reduced in sequence; according to different bubble generation quantities, the flow and frequency of bubbles introduced into the flotation barrel are different.
As a further improvement of the invention, the air holes of a certain layer of the air outlet ring are opened firstly, the bubbles on the upper layer of the waste paper pulp are observed, and the time from the beginning of ink carrying to the end of ink carrying of the small bubbles is observed; according to the length of the elapsed time, the ink is divided into a small ink-rich type and a small ink-poor type; observing the time that the large bubbles spend from initial inking to non-inking; according to the length of the elapsed time, the ink is divided into a large ink type and a small ink type; the small ink is more in small bubbles needed by the small ink and less in small bubbles needed by the small ink; the large ink-rich type requires a large amount of large bubbles, and the large ink-poor type requires a small amount of large bubbles.
As a further improvement of the invention, the air holes are provided with a plurality of air holes which are uniformly distributed relative to the circumference of the axis of the main shaft;
a movable cavity is formed in the bottom wall of the flotation barrel and is communicated with the flotation barrel;
the upper end of the bottom wall of the flotation barrel is provided with a driving cavity, and the driving cavity is communicated with the moving cavity;
a magnetic stop block is connected in the movable cavity in a sliding manner and is made of a magnetic material;
a driving block is fixedly arranged in the driving cavity, the driving block is made of a magnetic material or a magnetic material, the upper end of the driving block is flush with the inner bottom wall of the flotation barrel, and the lower end part of the driving cavity is positioned at the communication position of the driving cavity and the moving cavity; in a free state, the driving block and the magnetic stop block are relatively static;
the driving unit comprises a butting block, and the butting block is connected with the inner bottom wall of the flotation bucket in a sliding manner; the number of the abutting blocks corresponds to the number of the air holes and is uniformly distributed relative to the circumference of the axis of the main shaft, the abutting blocks are arc-shaped, and the abutting blocks are fixedly connected with the main shaft through connecting rods; when the main shaft rotates around the axis of the main shaft, the abutting block rotates around the axis of the main shaft, and the upper end face of the driving block is positioned in the rotating range of the abutting block; the abutting block is made of magnetic materials, and the magnetism at the lower end of the abutting block is the same as that at the end of the magnetic stop block, which is close to the driving cavity;
when the abutting block rotates to abut against the upper end of the driving block, the magnetic stop block is subjected to magnetic force moving towards the air hole side, the magnetic stop block moves and blocks the partial area of the air hole, and the caliber of the air hole is reduced.
As a further improvement of the invention, an elastic sealing ring is fixedly arranged in the moving cavity and is made of elastic materials; the outer end of magnetism dog is located to the elastic sealing ring cover, and the outer end and the removal intracavity wall fixed connection of elastic sealing ring, the inner and the outer end butt of magnetism dog of elastic sealing ring, and the diameter that the inner bore of elastic sealing ring is less than the magnetism dog under free state, and elastic sealing ring is the compressed state all the time.
As a further improvement of the invention, the driving block is made of a magnetic conductive material, the lower end part of the driving block is abutted against one end of the magnetic block in a free state, and the other end of the magnetic block is flush with the inner wall of the air hole; after the driving block is abutted against the abutting block, the driving block is provided with magnetism, the lower end part of the driving block obtains magnetism consistent with the lower end face of the abutting block, the magnetism of the end, close to the driving cavity, of the magnetic stop block is the same as that of the lower end part of the driving block, and the magnetic stop block moves towards the air hole.
As a further improvement of the invention, the driving block is made of magnetic material, and the magnetism of the lower end part of the driving block is the same as that of the end of the magnetic block close to the driving cavity; in a free state, a gap is reserved between the lower end part of the driving block and one end of the magnetic block, and the other end of the magnetic block is flush with the inner wall of the air hole; after the driving block is abutted to the abutting block, the driving block is additionally provided with magnetic enhancement, the magnetic stop block is enhanced by magnetic force towards the air hole side, and the magnetic stop block moves towards the air hole.
As a further improvement of the present invention, the main shaft includes a drive shaft and a driven shaft; the lower end part of the driving shaft is movably sleeved outside the upper end part of the driven shaft; the upper end of the driving shaft is connected with the output end of an external motor, and fan blades are fixedly arranged on the periphery of the driving shaft; the lower end part of the driving shaft is internally and slidably connected with a clamping block;
the lower end part of the driven shaft is rotationally connected with the flotation barrel; the driving unit is fixedly arranged on the periphery of the lower end part of the driven shaft; the periphery of the upper end part of the driven shaft is provided with a clamping groove; the clamping block is embedded in the clamping groove;
the lower end part of the driven shaft penetrates through the flotation barrel and is connected with an external adjusting unit; the adjusting unit is used for driving the clamping block to move so as to disconnect the driven shaft from the driving shaft.
Another object of the present invention is to provide a waste paper deinking recycled cultural paper produced by the method.
Compared with the prior art, the invention has the beneficial effects that:
the invention can generate bubbles with different sizes at the same position by automatically changing the size of the air holes, so that ink particles attached to fibers in the slurry are completely separated.
The size of the air hole is adjusted through the movement of the cam, and the movement of the cam is driven by the rotation of the main shaft, so that the cost for independently driving the cam is reduced.
The size of the air hole is controlled by the magnetic stop block arranged in the inner bottom wall of the flotation bucket, and the magnetic stop block can extend into the air hole to change the size of the air hole after the abutting block is contacted with the driving block, so that the analysis that the magnetic stop block is blocked by fibers and cannot move is avoided.
The main shaft of the invention is divided into a driving shaft and a driven shaft, and after the driving shaft and the driven shaft are separated by the adjusting unit, the abutting block is always contacted with the driving block, so that the production quantity and the production time of small bubbles are increased, and the production quantity of bubbles with different sizes is changed.
Drawings
Fig. 1 is a schematic partial perspective view of a flotation tank according to a first embodiment of the invention;
FIG. 2 is a top view of the flotation tank at the bottom wall thereof according to a first embodiment of the present invention;
FIG. 3 is a top view of a driving unit according to a second embodiment of the present invention;
FIG. 4 is a schematic view of a connection structure between a plurality of cams according to a third embodiment of the present invention;
figure 5 is a schematic plan cross-sectional view of a flotation tank in accordance with a fourth embodiment of the invention in its bottom wall;
FIG. 6 is a schematic sectional plan view of an air vent according to a fourth embodiment of the present invention;
FIG. 7 is a schematic structural diagram of the position between the magnetic stopper and the driving block according to a fourth embodiment of the present invention;
fig. 8 is a schematic diagram illustrating a movement trend of the magnetic block after the abutting block abuts against the driving block according to the fourth embodiment of the present invention;
FIG. 9 is a schematic structural diagram illustrating a position of the magnetic stopper after entering the air hole according to a fourth embodiment of the present invention;
fig. 10 is a schematic plan sectional view of a spindle according to a sixth embodiment of the present invention.
The reference numbers in the figures illustrate:
flotation tank 1, air hole 101, moving cavity 102, driving cavity 103, elastic sealing ring 104, main shaft 2, driving shaft 201, driven shaft 202, interference unit 3, magnetic block 301, driving block 302, driving unit 4 and abutting block 401.
Detailed Description
The first embodiment is as follows: referring to fig. 1-2, a method for manufacturing recycled cultural paper by deinking waste paper comprises the following steps:
s1, material preparation: mixing the waste paper and water to form waste paper pulp, wherein the concentration of the waste paper pulp is 23-25%;
s2, pulping: placing the waste paper pulp in a hydrapulper, and adding a silicon deinking agent to untwist the waste paper into fibers, dispersing the flaky ink particles, and separating large-particle impurities from the fibers;
s3, purifying: placing the waste paper pulp after pulping in a high-concentration slag separator, a low-concentration slag separator, a composite coarse screening machine, a coarse pulp tower and a heavy slag separator, and removing large-particle impurities separated in the pulping process;
s4, flotation: the method comprises the steps of introducing air bubbles and a surfactant into purified waste paper pulp to change sticky impurities bonded on fibers into hydrophobic particles, adsorbing the hydrophobic particles by the air bubbles, finally gathering the particles on the upper layer of the waste paper pulp and scraping the particles by a scraper, and controlling the size of the air bubbles and the introduction amount of the air bubbles with different sizes according to the amount of the sticky impurities in the waste paper pulp during flotation;
s5, concentrating: concentrating waste paper pulp to 25-35% dryness, and heating to 90-110 ℃ by using saturated steam;
s6, thermal dispersion: the concentrated and heated waste paper pulp is introduced into a heat dispersion machine, and hot melt substances stuck on the waste paper are separated from the fibers under the mechanical action by utilizing the strong friction action among high-concentration fibers, are dispersed into tiny particles, are uniformly dispersed in the middle of the fibers, and remove impurities;
s7, bleaching: introducing the waste paper pulp into a bleaching tower, and bleaching by using hydrogen peroxide, sodium sulfate and formamidine sulfinic acid;
s8, paper making: and introducing the waste paper pulp into a paper making system to regenerate the cultural paper.
Except for flotation, the other process steps are consistent with the existing operation mode, and are not described herein.
Wherein, the waste paper pulp is introduced into a flotation barrel 1 during flotation, a main shaft 2 is arranged in the flotation barrel 1, and the main shaft 2 is coaxial with the flotation barrel 1; the fan blades and the driving unit 4 are arranged on the periphery of the main shaft 2;
the bottom of the flotation barrel 1 is provided with a through air hole 101, the air hole 101 is communicated with an air pump and used for introducing air into the flotation barrel 1, and the air enters the flotation barrel 1 through the air hole 101 to form bubbles; the air holes 101 are provided with a plurality of air holes and are uniformly distributed relative to the circumference of the axis of the main shaft 2;
an interference unit 3 is arranged in the flotation barrel 1, the interference unit 3 comprises a cam, the cam is positioned on the inner bottom wall of the flotation barrel 1, one end of the cam is rotatably connected with the inner bottom wall of the flotation barrel 1, the other end of the cam is a movable end, the cam rotates to have self-return performance, and the number of the cam corresponds to the number of the air holes 101; the cam is positioned at the inner side of the axle center of the main shaft 2 relative to the air hole 101, and the rotating range of the movable end of the cam is overlapped with the area of part of the outlet of the air hole 101;
the driving unit 4 comprises abutting blocks 401, the number of the abutting blocks 401 corresponds to the number of the air holes 101, the abutting blocks are evenly distributed relative to the circumference of the axis of the main shaft 2, the abutting blocks 401 are arc-shaped, and the abutting blocks 401 are fixedly connected with the main shaft 2 through connecting rods;
when the main shaft 2 rotates around the axis of the main shaft 2, the abutting block 401 rotates around the axis of the main shaft 2, and in a free state, the movable end of the cam is positioned in the rotating range of the abutting block 401; the free state is an equilibrium state without external force interference; after the movable end of the cam abuts against the abutting block 401, the cam rotates towards the direction of the air hole 101, covers a part of the air hole 101 and reduces the caliber of the air hole 101.
In addition, each air hole 101 is correspondingly provided with an electromagnetic valve, the electromagnetic valves are controlled by a controller arranged outside, each electromagnetic valve is independently controlled, and the electromagnetic valves are positioned between the air holes 101 and the air pump; firstly, opening the air hole of a certain layer of air outlet ring, observing the air bubbles on the upper layer of the waste paper pulp, and observing the elapsed time from the beginning of carrying ink to the end of carrying no ink; according to the length of the elapsed time, the ink is divided into three grades of a multi-ink type, a medium-ink type and a low-ink type; the generation amount of bubbles of three grades of a multi-ink type, a medium-ink type and a low-ink type is reduced in sequence; according to different bubble generation quantities, the flow and frequency of bubbles introduced into the flotation barrel are different.
Further, the air pressure is always present in the air holes 101, and the slurry is pushed upward by the air pressure, so that the slurry cannot settle into the air holes 101.
The second embodiment is as follows: on the basis of the first embodiment, please refer to fig. 3 for a manufacturing method of waste paper deinking recycled cultural paper, the inner bottom wall of the flotation tank 1 is provided with a plurality of layers of air outlet rings, each layer of air outlet ring comprises a plurality of air holes 101 which are uniformly distributed, and the plurality of layers of air outlet rings are distributed in a plurality of concentric circles; the concentric circles are coaxial with the main shaft 2;
the abutting blocks 401 have various specifications, the connecting rods of the abutting blocks 401 with different specifications are different in length, and the specification number corresponds to the number of the layers of the air outlet ring; the movable range of the abutment block 401 of each specification covers the position of the movable end of the cam in the corresponding balloon in the free state.
The connecting rods corresponding to the abutting blocks 401 of each specification are located in different planes, namely the connecting rods corresponding to the abutting blocks 401 of different specifications are located at different horizontal heights; the abutting blocks 401 are all located on the lower side, away from the end of the main shaft 2, of the corresponding connecting rod, and the connecting rod is effectively prevented from interfering the cam motion corresponding to the abutting blocks 401 of other specifications.
The third concrete embodiment: different from the second embodiment, please refer to the manufacturing method of recycled cultural paper for deinking waste paper in fig. 4, the abutting block 401 has only one specification, that is, the abutting block 401 drives only the cam corresponding to the air hole 101 of the air outlet ring closest to the main shaft 2; every layer goes out the gas pocket 101 quantity of gas circle and all is unanimous, and the gas pocket 101 that goes out the gas circle of difference all is located same straight line, through leg joint between the cam of the gas pocket 101 that is located same straight line, after the cam that is closest to main shaft 2 rotates, drives all the other cams syntropy and rotates simultaneously through the support, has effectively avoided too much connecting rod to obstruct the bubble and has risen, increases the bonding rate of bubble and printing ink particle.
In a fourth embodiment, different from the first or second embodiment, please refer to the manufacturing method of recycled cultural paper for deinking waste paper in FIGS. 5-9,
the air holes 101 are provided with a plurality of air holes and are uniformly distributed relative to the circumference of the axis of the main shaft 2;
a movable cavity 102 is formed in the bottom wall of the flotation barrel 1, and the movable cavity 102 is communicated with the flotation barrel 1;
the upper end of the bottom wall of the flotation barrel 1 is provided with a driving cavity 103, and the driving cavity 103 is communicated with the movable cavity 102;
a magnetic block 301 is connected in the movable cavity 102 in a sliding manner, and the magnetic block 301 is a magnet; each wall of the flotation barrel 1 is made of non-magnetic materials; the end of the magnetic block 301 close to the air hole 101 is an S pole, and the end of the magnetic block 301 close to the driving cavity 103 is an N pole;
a driving block 302 is fixedly arranged in the driving cavity 103, the driving block 302 is made of magnetic conductive materials (such as ferroalloy), the upper end of the driving block 302 is flush with the inner bottom wall of the flotation barrel 1, and the lower end part of the driving block 302 is positioned at the communication part of the driving cavity 103 and the movable cavity 102; in the free state, the driving block 302 and the magnetic block 301 are relatively static;
the driving unit 4 comprises a butting block 401, and the butting block 401 is connected with the inner bottom wall of the flotation bucket 1 in a sliding manner; the number of the abutting blocks 401 corresponds to that of the air holes 101, the abutting blocks 401 are evenly distributed relative to the circumference of the axis of the main shaft 2, the abutting blocks 401 are arc-shaped, and the abutting blocks 401 are fixedly connected with the main shaft 2 through connecting rods; when the main shaft 2 rotates around the axis of the main shaft 2, the abutting block 401 rotates around the axis of the main shaft 2, and the upper end face of the driving block 302 is located in the rotating range of the abutting block 401; the abutting block 401 is made of a magnetic material, the upper end of the abutting block 401 is an S pole, and the lower end of the abutting block 401 is an N pole;
when the abutting block 401 rotates to abut against the upper end of the driving block 302, the driving block 302 is magnetized by the abutting block 401, and the driving block 302 is magnetized to form a magnet with an N-pole lower end due to the magnetic setting of the abutting block 401; the end of the magnetic block 301 close to the driving cavity 103 is an N pole, and the N pole of the magnetic block 301 corresponds to the lower end of the driving block 302, so that the magnetic block 301 is subjected to magnetic force moving towards the air hole 101, the magnetic block 301 moves to block partial area of the air hole 101, and the aperture of the air hole 101 is reduced.
Meanwhile, in order to ensure that the magnetic block 301 keeps a gap with the driving block 302 in a free state and cannot abut against and suck the driving block 302, the driving block 302 is magnetized, an elastic sealing ring 104 is fixedly arranged in the moving cavity 102, and the elastic sealing ring 104 is made of an elastic material; the outer end of the magnetic block 301 is sleeved with the elastic sealing ring 104, the outer end of the elastic sealing ring 104 is fixedly connected with the inner wall of the movable cavity 102, the inner end of the elastic sealing ring 104 is abutted to the outer end of the magnetic block 301, the inner end caliber of the elastic sealing ring 104 is smaller than the diameter of the magnetic block 301 in a free state, and the elastic sealing ring 104 is always in a compressed state. When magnetic block 301 has a tendency to move towards drive block 302, resilient sealing ring 104 will pull magnetic block 301 all the way away from drive block 302. Meanwhile, the air holes 101 and the moving cavity 102 can be ensured to be closed, so that air and slurry cannot enter the moving cavity 102.
Due to the rotation of the abutting block 401, the driving block 302 and the abutting block 401 are separated in a direction perpendicular to the magnetic induction line, so that the separation is easy, and the interference of the spindle 2 caused by the fact that the driving block 302 and the abutting block 401 cannot be separated due to the attraction of magnetic force is avoided.
In the fifth embodiment, different from the fourth embodiment, the driving block 302 is a magnet, the lower end of the driving block 302 is an N pole, and the upper end of the driving block 302 is an S pole; in a free state, a gap is reserved between the lower end part of the driving block 302 and the N pole end of the magnetic block 301 due to the same magnetism, and the S pole end of the magnetic block 301 is flush with the inner wall of the air hole 101; when the driving block 302 abuts against the abutment block 401, the magnetism of the lower end of the abutment block 401 is opposite to that of the upper end of the driving block 302, and thus the magnetism of the new magnet formed by combining the driving block 302 and the abutment block 401 is increased, and the magnetic force of the magnetic stopper 301 toward the air hole 101 is increased, so that the magnetic stopper 301 moves into the air hole 101. Such an arrangement also ensures that the drive block 302 and abutment block 401 are more firmly combined and do not separate quickly due to the centrifugal force of the rotation of the abutment block 401.
In the sixth embodiment, different from the second, fourth or fifth embodiment, please refer to the manufacturing method of recycled cultural paper for deinking waste paper in fig. 10, the main shaft 2 includes a driving shaft 201 and a driven shaft 202; the lower end part of the driving shaft 201 is movably sleeved outside the upper end part of the driven shaft 202; the upper end of the driving shaft 201 is connected with the output end of an external motor, and fan blades are fixedly arranged on the periphery of the driving shaft 201; a clamping block is connected in the lower end part of the driving shaft 201 in a sliding way;
the lower end part of the driven shaft 202 is rotationally connected with the flotation barrel 1; the driving unit 4 is fixedly arranged on the periphery of the lower end part of the driven shaft 202; a clamping groove is formed in the periphery of the upper end of the driven shaft 202; the clamping block is embedded in the clamping groove; so that the driving shaft 201 and the driven shaft 202 are detachably connected;
the lower end part of the driven shaft 202 penetrates through the flotation barrel 1 and is connected with an external adjusting unit; the adjusting unit is used for driving the fixture block to move, so that the driven shaft 202 is disconnected with the driving shaft 201;
the adjusting unit is an electromagnet, and the driven shaft 202 is made of a magnetic conductive material; the flotation barrel 1 and the driving shaft 201 are both made of non-magnetic materials, the fixture block is made of magnetic materials, and the end part of the fixture block embedded in the clamping groove is an N pole; the electromagnet becomes a magnet after being electrified, the driven shaft is provided with magnetism, the upper end part of the driven shaft is an N pole, the magnetism of the fixture block in the fixture groove is the same as that of the fixture groove, the fixture block moves towards the direction far away from the fixture groove and finally breaks away from the fixture groove, the connection between the driving shaft 201 and the driven shaft 202 is disconnected, and the driving shaft 201 does not drive the driven shaft 202 to rotate any more; the range of movement of the fixture block is limited, the fixture block cannot be separated from the driving shaft 201, and the fixture block is always located inside the lower end portion of the driving shaft 201, that is, the sliding space of the fixture block is closed and not open.
When the driving unit 4 drives the interference unit 301 to reduce the caliber of the air hole 101, the driven shaft 202 does not rotate at the time of the electrifying time node of the electromagnet, and the air hole 101 can always discharge small-sized bubbles; after the electromagnet is powered off, the clamping block is attracted by magnetic force and is embedded in the clamping groove again, the driving shaft 201 continues to drive the driven shaft 202 to rotate, at the moment, the driving unit 4 does not drive the interference unit 301 any more, the interference unit 301 returns, and the air hole 101 discharges large-size bubbles again, so that the respective discharge amount and time of the small-size bubbles and the large-size bubbles can be controlled.
The method how to control the discharge amount of small-size bubbles and large-size bubbles: firstly, opening the air hole of a certain layer of air outlet ring, observing the bubbles on the upper layer of the waste paper pulp, and observing the time from the beginning of ink carrying to the end of ink carrying of small bubbles; according to the length of the elapsed time, the ink is divided into a small ink-rich type and a small ink-poor type; observing the time that the large bubbles spend from initial inking to non-inking; according to the length of the elapsed time, the ink is divided into a large ink type and a small ink type; the small ink is more in small bubbles needed by the small ink and less in small bubbles needed by the small ink; the large ink-rich type requires a large amount of large bubbles, and the large ink-poor type requires a small amount of large bubbles.
The seventh specific embodiment is different from the sixth specific embodiment in that the adjusting unit is an air pump, the driven shaft is hollow, an air bag is arranged in the clamping groove, the air bag is communicated with an inner cavity of the driven shaft, and the air pump is communicated with the inner cavity of the driven shaft; the expansion direction of the air bag is in the radial direction of the driven shaft in the clamping groove, and the air bag is always abutted to the clamping block; when the driving shaft 201 and the driven shaft 202 need to be separated, the air pump is started to inflate the air bag, the air bag extends from inside to outside along the radial direction, the clamping block is ejected out of the clamping groove, and the driving shaft 201 is separated from the driven shaft 202.

Claims (10)

1. A method for manufacturing waste paper deinking recycled cultural paper is characterized in that: the method comprises the following steps:
s1, material preparation: mixing the waste paper and water to form waste paper pulp, wherein the concentration of the waste paper pulp is 23-25%;
s2, pulping: placing the waste paper pulp in a hydrapulper, and adding a silicon deinking agent to untwist the waste paper into fibers, dispersing the flaky ink particles, and separating large-particle impurities from the fibers;
s3, purifying: placing the waste paper pulp after pulping in a high-concentration slag separator, a low-concentration slag separator, a composite coarse screening machine, a coarse pulp tower and a heavy slag separator, and removing large-particle impurities separated in the pulping process;
s4, flotation: the method comprises the steps of introducing air bubbles and a surfactant into purified waste paper pulp to change sticky impurities bonded on fibers into hydrophobic particles, adsorbing the hydrophobic particles by the air bubbles, finally gathering the particles on the upper layer of the waste paper pulp and scraping the particles by a scraper, and controlling the size of the air bubbles and the introduction amount of the air bubbles with different sizes according to the amount of the sticky impurities in the waste paper pulp during flotation;
s5, concentrating: concentrating waste paper pulp to 25-35% dryness, and heating to 90-110 ℃ by using saturated steam;
s6, thermal dispersion: the concentrated and heated waste paper pulp is introduced into a heat dispersion machine, and hot melt substances stuck on the waste paper are separated from the fibers under the mechanical action by utilizing the strong friction action among high-concentration fibers, are dispersed into tiny particles, are uniformly dispersed in the middle of the fibers, and remove impurities;
s7, bleaching: introducing the waste paper pulp into a bleaching tower, and bleaching by using hydrogen peroxide, sodium sulfate and formamidine sulfinic acid;
s8, paper making: and introducing the waste paper pulp into a paper making system to regenerate the cultural paper.
2. The method for producing a used paper deinking recycled cultural paper as recited in claim 1, wherein: when the waste paper pulp is floated, the waste paper pulp is introduced into a flotation barrel (1), a main shaft (2) is arranged in the flotation barrel (1), and fan blades and a driving unit (4) are arranged on the peripheral side of the main shaft (2); the bottom of the flotation barrel (1) is provided with a through air hole (101), the air hole (101) is communicated with an air pump and used for introducing air into the flotation barrel (1), and the air enters the flotation barrel (1) through the air hole (101) to form bubbles; an interference unit (3) is arranged in the flotation barrel (1), and the aperture of the air hole (101) can be reduced after the interference unit (3) is driven by external force; after the driving unit (4) is abutted with the interference unit (3), the interference unit (3) is driven to move towards the air hole (101).
3. The method for producing a used paper deinking recycled cultural paper as recited in claim 2, wherein: the air holes (101) are provided with a plurality of air holes and are uniformly distributed relative to the circumference of the axis of the main shaft (2);
the interference unit (3) comprises a cam, the cam is positioned on the inner bottom wall of the flotation barrel (1), one end of the cam is rotatably connected with the inner bottom wall of the flotation barrel (1), the other end of the cam is a movable end, the cam rotates to have self-return performance, and the number of the cam corresponds to the number of the air holes (101); the cam is positioned on the inner side of the axis of the main shaft (2) relative to the air hole (101), and the rotating range of the movable end of the cam is overlapped with the area of part of the outlet of the air hole (101);
the driving unit (4) comprises abutting blocks (401), the number of the abutting blocks (401) corresponds to that of the air holes (101), the abutting blocks are uniformly distributed relative to the circumference of the axis of the main shaft (2), the abutting blocks (401) are arc-shaped, and the abutting blocks (401) are fixedly connected with the main shaft (2) through connecting rods;
when the main shaft (2) rotates around the axis of the main shaft (2), the abutting block (401) rotates around the axis of the main shaft (2), and in a free state, the movable end of the cam is positioned in the rotating range of the abutting block (401);
after the movable end of the cam is abutted to the abutting block (401), the movable end rotates towards the air hole (101), covers part of the air hole (101), and reduces the caliber of the air hole (101).
4. The method for producing a used paper deinking recycled cultural paper as recited in claim 3, wherein: the inner bottom wall of the flotation barrel (1) is provided with a plurality of layers of air outlet rings, each layer of air outlet ring comprises a plurality of uniformly distributed air holes (101), and the plurality of layers of air outlet rings are distributed in a plurality of concentric circles; the concentric circle is coaxial with the main shaft (2);
the abutting blocks (401) have various specifications, the lengths of the connecting rods of the abutting blocks (401) with different specifications are different, and the specification number corresponds to the number of the layers of the air outlet ring; the movable range of the abutting block (401) of each specification covers the position of the movable end of the cam in the corresponding air outlet ring in a free state.
5. The method for producing a used paper deinking recycled cultural paper as recited in claim 2, wherein: the air holes (101) are provided with a plurality of air holes and are uniformly distributed relative to the circumference of the axis of the main shaft (2);
a movable cavity (102) is formed in the bottom wall of the flotation barrel (1), and the movable cavity (102) is communicated with the flotation barrel (1);
the upper end of the bottom wall of the flotation barrel (1) is provided with a driving cavity (103), and the driving cavity (103) is communicated with the moving cavity (102);
a magnetic block (301) is connected in the movable cavity (102) in a sliding manner, and the magnetic block (301) is made of a magnetic material;
a driving block (302) is fixedly arranged in the driving cavity (103), the driving block (302) is made of a magnetic conductive material or a magnetic material, the upper end of the driving block (302) is flush with the inner bottom wall of the flotation barrel (1), and the lower end part of the driving block (302) is positioned at the communication part of the driving cavity (103) and the moving cavity (102); in a free state, the driving block (302) and the magnetic block (301) are relatively static;
the driving unit (4) comprises a butting block (401), and the butting block (401) is connected with the inner bottom wall of the flotation barrel (1) in a sliding manner; the number of the abutting blocks (401) corresponds to that of the air holes (101), the abutting blocks are uniformly distributed relative to the circumference of the axis of the main shaft (2), the abutting blocks (401) are arc-shaped, and the abutting blocks (401) are fixedly connected with the main shaft (2) through connecting rods; when the main shaft (2) rotates around the axis of the main shaft (2), the abutting block (401) rotates around the axis of the main shaft (2), and the upper end face of the driving block (302) is located in the rotating range of the abutting block (401); the abutting block (401) is made of magnetic materials, and the magnetism at the lower end of the abutting block (401) is the same as that at the end, close to the driving cavity (103), of the magnetic block (301);
when the abutting block (401) rotates to abut against the upper end of the driving block (302), the magnetic block (301) receives magnetic force moving towards the air hole (101), the magnetic block (301) moves to block partial area of the air hole (101), and the caliber of the air hole (101) is reduced.
6. The method for producing a used paper deinking recycled cultural paper as recited in claim 5, wherein: an elastic sealing ring (104) is fixedly arranged in the moving cavity (102), and the elastic sealing ring (104) is made of elastic materials; the outer end of the magnetic stop block (301) is sleeved with the elastic sealing ring (104), the outer end of the elastic sealing ring (104) is fixedly connected with the inner wall of the moving cavity (102), the inner end of the elastic sealing ring (104) is abutted to the outer end of the magnetic stop block (301), the inner end caliber of the elastic sealing ring (104) is smaller than the diameter of the magnetic stop block (301) in a free state, and the elastic sealing ring (104) is always in a compressed state.
7. The method for producing a used paper deinking recycled cultural paper as recited in claim 6, wherein: the driving block (302) is made of a magnetic conductive material, the lower end part of the driving block (302) is abutted against one end of the magnetic block (301) in a free state, and the other end of the magnetic block (301) is flush with the inner wall of the air hole (101); after the driving block (302) is abutted with the abutting block (401), the driving block (302) is provided with magnetism, wherein the lower end part of the driving block (302) obtains the magnetism consistent with the lower end surface of the abutting block (401), the magnetism of the end, close to the driving cavity (103), of the magnetic block (301) is the same as that of the lower end part of the driving block (302), and the magnetic block (301) moves into the air hole (101).
8. The method for producing a used paper deinking recycled cultural paper as recited in claim 6, wherein: the driving block (302) is made of a magnetic material, and the magnetism of the lower end part of the driving block (302) is the same as that of the end, close to the driving cavity (103), of the magnetic block (301); in a free state, a gap is reserved between the lower end part of the driving block (302) and one end of the magnetic block (301), and the other end of the magnetic block (301) is flush with the inner wall of the air hole (101); when the driving block (302) is abutted against the abutting block (401), the driving block (302) is provided with magnetic enhancement, the magnetic block (301) is enhanced by magnetic force towards the air hole (101), and the magnetic block (301) moves towards the air hole (101).
9. The method for producing a used paper deinking recycled cultural paper as recited in claim 6, wherein: the main shaft (2) comprises a driving shaft (201) and a driven shaft (202); the lower end part of the driving shaft (201) is movably sleeved outside the upper end part of the driven shaft (202); the upper end of the driving shaft (201) is connected with the output end of an external motor, and fan blades are fixedly arranged on the periphery of the driving shaft (201); a clamping block is slidably connected in the lower end part of the driving shaft (201);
the lower end part of the driven shaft (202) is rotationally connected with the flotation barrel (1); the driving unit (4) is fixedly arranged on the periphery of the lower end part of the driven shaft (202); a clamping groove is formed in the periphery of the upper end of the driven shaft (202); the clamping block is embedded in the clamping groove;
the lower end part of the driven shaft (202) penetrates through the flotation barrel (1) and is connected with an external adjusting unit; the adjusting unit is used for driving the fixture block to move, so that the driven shaft (202) is disconnected with the driving shaft (201).
10. A waste paper deinking regeneration culture paper is characterized in that: the process for producing a used paper deinking recycled cultural paper according to any one of claims 1 to 9.
CN202111394013.8A 2021-11-23 2021-11-23 Waste paper deinking regeneration cultural paper and manufacturing method thereof Active CN114134740B (en)

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