CN107401076B - Deinked pulp flotation device and deinking method for laboratory - Google Patents
Deinked pulp flotation device and deinking method for laboratory Download PDFInfo
- Publication number
- CN107401076B CN107401076B CN201710776879.2A CN201710776879A CN107401076B CN 107401076 B CN107401076 B CN 107401076B CN 201710776879 A CN201710776879 A CN 201710776879A CN 107401076 B CN107401076 B CN 107401076B
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- plate body
- container
- flotation
- pulp
- flotation plate
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- 238000005188 flotation Methods 0.000 title claims abstract description 87
- 239000002761 deinking Substances 0.000 title claims abstract description 33
- 229920001131 Pulp (paper) Polymers 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000007788 liquid Substances 0.000 claims abstract description 21
- 239000002245 particle Substances 0.000 claims abstract description 13
- 239000000835 fiber Substances 0.000 claims abstract description 12
- 238000007667 floating Methods 0.000 claims abstract description 4
- 239000002002 slurry Substances 0.000 claims description 21
- 239000004088 foaming agent Substances 0.000 claims description 8
- 238000005303 weighing Methods 0.000 claims description 7
- 239000011148 porous material Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 6
- 239000006260 foam Substances 0.000 description 5
- 238000007639 printing Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 239000010893 paper waste Substances 0.000 description 2
- 239000003570 air Substances 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
Abstract
The invention discloses a deinked pulp flotation device for a laboratory and a deinking method, wherein the device comprises a first container, a flotation plate body and a traction mechanism, wherein a plurality of through holes are formed in the flotation plate body, pulp to be deinked and the flotation plate body are arranged in the first container, and under the driving of the traction mechanism, the flotation plate body moves up and down in the first container to enable the pulp to generate bubbles, so that ink particles in the pulp are separated from pulp fibers by means of the floating of the bubbles. The laboratory deinking pulp flotation device can promote ink particles to separate from the surface of the fiber due to inertia in the process of reciprocating the fiber up and down on the panel, and the deinking is finished by floating generated bubbles to the liquid level, and the pulp fiber still keeps good uniformity.
Description
Technical Field
The invention relates to the field of papermaking, in particular to a deinking pulp flotation device and a deinking method for a laboratory.
Background
Waste paper has become an important raw material for paper making, wherein the cultural waste paper requires removal of ink printed on paper surface during pulping, and the pulp is called deinked pulp. In practice, flotation cells are the main equipment for deinking today, and the key technology is that pulp is sprayed into the cell at high speed, the fluid creates a negative pressure which induces ambient air into the pipe causing the formation of froth, and a large amount of ink particles tend to adhere to the froth surface and rise to the liquid level of the flotation cell together to be removed. Experimental devices specifically directed to deinked pulp flotation are not uncommon and achieving high velocity fluids in the laboratory often requires large amounts of pulp, which in itself is inconvenient. The bottom of deinked pulp is blown with gas, which tends to float to the liquid surface together with the fibers. The rotary flotation device of the present application patent receives the centrifugal effect in the rotation process because printing ink particle and paper pulp density difference, and the gathering area of printing ink is inhomogeneous, and the foam that produces is inhomogeneous inadequately, and fibre and printing ink separation effect are not good, and the bubble size is difficult to adjust, does not have selectivity to the difference of deinking thick liquid, and the effect of flotation also can drop.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a deinking pulp flotation device and a deinking method for a laboratory, wherein the device can generate continuous and mild stable bubbles, the size of the bubbles can be properly adjusted according to the size of conical holes of a circular plate, the number of the bubbles can be adjusted according to the reciprocating speed of the circular plate, and in addition, the effect of removing ink can be further analyzed by designing the proportion of good pulp, and the technical scheme is as follows:
on the one hand, the invention provides a deinked pulp flotation device for a laboratory, which comprises a first container, a flotation plate body and a traction mechanism, wherein a plurality of through holes are formed in the flotation plate body, pulp to be deinked and the flotation plate body are arranged in the first container, and under the driving of the traction mechanism, the flotation plate body moves up and down in the first container to enable the pulp to generate bubbles, so that ink particles in the pulp are separated from pulp fibers by means of the floating of the bubbles.
Further, the through holes are multiple, and the through holes are conical round holes or cylindrical holes.
Further, the shape of the flotation plate body is matched with the inner wall of the first container.
Further, the first container is a transparent container, and scales and/or liquid level indication marks are arranged on the first container.
Further, the traction mechanism comprises a traction rope, a guide channel and a traction motor, wherein the upper end of the traction rope is connected with the output end of the traction motor, and the lower end of the traction rope penetrates through the guide channel and is connected with the flotation plate body.
Further, the device also comprises an on-off valve arranged at the bottom of the first container and a second container arranged below the first container, wherein when the on-off valve is opened, the slurry in the first container flows into the second container.
Further, the flotation plate body comprises a plurality of plate bodies with different through hole pore sizes and/or different through hole numbers, the flotation plate body is further provided with a central hole, and the pore diameter of the central hole is larger than that of the through hole and is close to the pipe diameter of the discharge pipe at the switch valve.
Further, the device also includes a scale, and the second container is disposed on the scale.
On the other hand, the invention also provides a deinking method by using the deinking pulp flotation device for the laboratory, which comprises the following steps:
s1, closing a switch valve, and pouring pulp to be deinked into a first container;
s2, placing a flotation plate body connected with the traction mechanism into slurry of a first container;
s3, starting a traction mechanism to enable the flotation plate body to reciprocate up and down at a non-uniform speed;
s4, after deinking is finished, opening a switch valve to transfer the deinked pulp to a second container.
Further, pouring the slurry in the step S1 until the liquid level of the slurry reaches a designated liquid level indication mark, and adding a foaming agent; and S3, the highest position of the up-and-down movement of the flotation plate body is not higher than the position 1cm above the liquid level indication mark.
The experimental principle of the invention is as follows: the experimental device designed for the deinked pulp flotation process can generate continuous and mild bubbles, the size of the bubbles can be properly adjusted according to the size of the conical holes of the circular plate, the number of the bubbles can be adjusted according to the reciprocating speed of the circular plate, ink particles can be promoted to be separated from the surface of the fibers due to inertia in the process of reciprocating the fibers up and down on the panel, the generated bubbles float to the liquid level, and the pulp fibers still maintain good uniformity. In addition, the slurry is discharged from the bottom, and the effect of ink removal can be further analyzed by designing the slurry ratio.
The laboratory deinked pulp flotation device provided by the invention has the following beneficial effects:
a. the device adopts the conical hole circular plate to reciprocate up and down at a non-uniform speed, and generates continuous and mild and stable bubbles by virtue of the foaming agent, so that ink particles can float out of paper pulp along with the bubbles, and the deinking effect is achieved;
b. the device has simple operation, high efficiency and rapidness, can flexibly control the discharge amount of the good pulp, flexibly select the foaming agent and the deinking agent, and is suitable for deinking and further analyzing the pulp for a laboratory.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a laboratory deinked pulp flotation device according to an embodiment of the present invention;
FIG. 2 is a top view of a flotation plate of a laboratory deinked pulp flotation device provided by an embodiment of the present invention;
FIG. 3 is a cross-sectional view of a flotation plate of a laboratory deinked pulp flotation device provided by an embodiment of the present invention;
fig. 4 is a flow chart of a deinking method provided by an embodiment of the present invention.
Wherein, the reference numerals include: the device comprises a first container, a 2-flotation plate body, a 21-through hole, a 22-central hole, a 3-traction mechanism, a 31-traction rope, a 32-guide channel, a 33-traction motor, a 4-switching valve, a 5-second container and a 6-weighing meter.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, apparatus, article, or device that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed or inherent to such process, method, article, or device.
Example 1
In one embodiment of the invention, a laboratory deinked pulp flotation device is provided, referring to fig. 1, the laboratory deinked pulp flotation device comprises a first container 1, a flotation plate body 2 and a traction mechanism 3, wherein a plurality of through holes 21 are formed in the flotation plate body 2, the pulp to be deinked and the flotation plate body 2 are arranged in the first container 1, and the flotation plate body 2 moves up and down in the first container 1 under the driving of the traction mechanism 3, so that ink particles in the pulp are separated from pulp fibers by means of air bubbles.
The first container 1 is a transparent container with scales, preferably, the surface of the container is also provided with a liquid level indication mark at a first position, the slurry is added into the first container 1 until the liquid level of the slurry reaches the liquid level indication mark at the first position, optionally, the liquid level indication mark at the first position is near the middle height of the first container 1, through the transparent container, the ink particles attached to the surface of the bubbles during the deinking process of the slurry in the first container 1 can be conveniently observed, and the thickness of the foam can be observed according to the scales of the container 1.
As shown in fig. 2, in this embodiment, the first container 1 is cylindrical, and correspondingly, the flotation plate 2 is a circular plate, and a plurality of through holes 21 are formed in the flotation plate 2, and the through holes 21 are conical round holes or cylindrical holes. In a preferred embodiment, the through hole 21 is a conical round hole, see fig. 3, and the through hole 21 is a reverse conical round hole, i.e. the aperture narrows in the downward direction. The conical round hole design is favorable for forming bubbles, ink particles can more easily reach the upper part of the flotation plate body 2 through the through holes 21 under the action of inertia force along with the increase of the upward aperture, and adhere to the surface of the bubbles above the flotation plate body 2, so that the deinking speed and the deinking efficiency of the pulp are accelerated. However, it should be noted that the flotation plate body 2 is a circular plate, and the present invention is not limited to the specific shape of the first container 1 and the flotation plate body 2, and preferably, the shape of the flotation plate body 2 matches the inner wall of the first container 1, and is preferably adapted in shape and size.
The size and number of the taper holes of the flotation plate body 2 can be selected, the flotation plate body 2 comprises a plurality of plate bodies with different sizes of the through holes 21 and/or different numbers of the through holes, for example, a plate body with 20 through holes 21 with the aperture of 5mm, a plate body with 15 through holes 21 with the aperture of 8mm, a plate body with 12 through holes 21 with the aperture of 10mm and the like can be selected according to different practical experimental environments of different requirements of deinking degree and container size.
In the embodiment of the present invention, the traction mechanism 3 includes a traction rope 31, a guide channel 32 and a traction motor 33, wherein the upper end of the traction rope 31 is connected to the output end of the traction motor 33, and the lower end of the traction rope passes through the guide channel 32 and is connected to the flotation plate 2, and the guide channel 32 is used for further improving the accuracy of the vertical movement of the flotation plate 2, so that the guide channel 32 is an optional additional component, and the flotation plate 2 generates uniform acting force on the slurry in the first container 1 during the vertical movement, thereby improving the uniformity of generating bubbles. In order to further improve the accuracy of the vertical movement of the flotation plate body 2, the traction rope 31 is connected with the central hole 22 of the flotation plate body 2, for example, the lower end of the traction rope 31 is provided with three sections of traction heads which are respectively connected with three points on the circumference of the central hole 22 at equal intervals. Preferably, the traction ropes 31 are rigid rods, so as to exert a force on the flotation plate body 2 when it is driven downwards.
Example 2
On the basis of the embodiment 1, the laboratory deinked pulp flotation device in the embodiment further comprises an on-off valve 4 arranged at the bottom of the first container 1 and a second container 5 arranged below the first container 1, wherein when the on-off valve 4 is opened, the pulp in the first container 1 flows into the second container 5.
Preferably, the aperture of the central hole 22 of the flotation plate body 2 is larger than the aperture of the through hole 21 and is close to the pipe diameter of the discharge pipe at the switch valve 4.
Further, the device comprises a weighing scale 6, and the second container 5 is arranged on the weighing scale 6. That is, after deinking is completed, the on-off valve 4 is opened, the pulp is discharged from the bottom of the first container 1, and flows into the transparent second container 5 with scales, and the weighing meter 6 is placed below the second container 5, and the target pulp amount can be obtained by adjusting the volume (obtained by reading the scales) or the quality (obtained by measuring the weighing meter 6).
In addition to the manner of this example, filtration may be used to skim the upper layer of foam with ink particles and then perform slurry transfer conditioning, which is not described in any greater detail herein.
Example 3
In one embodiment of the present invention, there is also provided a method for deinking using the above-described laboratory deinked pulp flotation apparatus, see fig. 4, comprising the steps of:
s1, closing a switch valve, and pouring pulp to be deinked into a first container;
s2, placing a flotation plate body connected with the traction mechanism into slurry of a first container;
s3, starting a traction mechanism to enable the flotation plate body to reciprocate up and down at a non-uniform speed;
s4, after deinking is finished, opening a switch valve to transfer the deinked pulp to a second container.
In order to increase the number of bubbles to increase deinking efficiency, it is preferable to add a foaming agent to the first vessel to increase the number and stability of the foam, the stability of the bubbles being ensured by the addition of the foaming agent, the foaming agent having no influence on the properties of the analytical pulp.
Further, pouring the slurry in the step S1 until the liquid level of the slurry reaches a designated liquid level indication mark; the highest position of the up-and-down movement of the flotation plate body in the S3 is not higher than the position 1cm above the liquid level indication mark, so that the flotation plate body is mainly prevented from being lifted to be too high to damage the formed foam during the downward movement, and the lowest position is the bottom of the first container.
Further, after deinking is completed in S4, the flotation plate is preferably left near the designated level indicator marks for better isolation of accepts from froth (and ink particles).
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (6)
1. The deinked pulp flotation device for the laboratory is characterized by comprising a first container (1), a flotation plate body (2) and a traction mechanism (3), wherein the shape of the flotation plate body (2) is matched with the inner wall of the first container (1), a plurality of through holes (21) are formed in the flotation plate body (2), the through holes (21) are conical round holes or cylindrical holes, the first container (1) is a transparent container, the first container (1) is configured to contain pulp to be deinked and the flotation plate body (2), and scales and liquid level indication marks are arranged on the first container (1);
the traction mechanism (3) comprises a rigid traction rope (31) to drive the flotation plate body (2), and the flotation plate body (2) moves up and down in the first container (1) under the drive of the traction mechanism (3) to enable slurry to generate bubbles, so that ink particles in the slurry are separated from slurry fibers by means of the floating of the bubbles;
the traction mechanism (3) further comprises a guide channel (32) and a traction motor (33), the upper end of the traction rope (31) is connected with the output end of the traction motor (33), and the lower end of the traction rope penetrates through the guide channel (32) and is connected with the flotation plate body (2);
the flotation plate body (2) comprises a plurality of plate bodies with different through hole pore diameters and/or different through holes, so that the flotation plate bodies (2) with different specifications are selected according to different deinking requirements;
the deinking pulp flotation device completes deinking by the following steps: pouring the pulp to be deinked into the first container until the liquid level of the pulp reaches a designated liquid level indication mark, and adding a foaming agent; placing a flotation plate body connected with the traction mechanism into slurry of a first container; and starting a traction mechanism to enable the flotation plate body to do up-and-down reciprocating non-uniform motion, wherein the highest position of the up-and-down motion of the flotation plate body is not higher than the position 1cm above the liquid level indication mark.
2. Laboratory deinked pulp flotation device according to claim 1, characterized in that the device further comprises an on-off valve (4) arranged at the bottom of the first vessel (1) and a second vessel (5) arranged below the first vessel (1), the pulp in the first vessel (1) flowing into the second vessel (5) when the on-off valve (4) is opened.
3. Laboratory deinked pulp flotation device according to claim 2, characterized in that the flotation plate body (2) is also provided with a central hole (22), the hole diameter of the central hole (22) being larger than the hole diameter of the through hole (21) and being close to the pipe diameter of the discharge pipe at the on-off valve (4).
4. A laboratory deinked pulp flotation device according to claim 2 or 3, characterized in that the device further comprises a weighing scale (6), the second container (5) being arranged on the weighing scale (6).
5. A method of deinking using the laboratory deinking pulp flotation plant of claim 2, comprising the steps of:
s1, closing a switch valve, and pouring pulp to be deinked into a first container;
s2, placing a flotation plate body connected with the traction mechanism into slurry of a first container;
s3, starting a traction mechanism to enable the flotation plate body to reciprocate up and down at a non-uniform speed;
s4, after deinking is finished, opening a switch valve to transfer the deinked pulp to a second container.
6. The method of claim 5, wherein the slurry is poured in S1 until the slurry level reaches a specified level indicator mark and a foaming agent is added; and S3, the highest position of the up-and-down movement of the flotation plate body is not higher than the position 1cm above the liquid level indication mark.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710776879.2A CN107401076B (en) | 2017-09-01 | 2017-09-01 | Deinked pulp flotation device and deinking method for laboratory |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710776879.2A CN107401076B (en) | 2017-09-01 | 2017-09-01 | Deinked pulp flotation device and deinking method for laboratory |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107401076A CN107401076A (en) | 2017-11-28 |
| CN107401076B true CN107401076B (en) | 2023-12-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710776879.2A Active CN107401076B (en) | 2017-09-01 | 2017-09-01 | Deinked pulp flotation device and deinking method for laboratory |
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| CN (1) | CN107401076B (en) |
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| CN2269415Y (en) * | 1996-08-05 | 1997-12-03 | 诸城市造纸设备制造厂 | Floatation and ink removing machine for waste paper |
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| CN1851116A (en) * | 2006-05-31 | 2006-10-25 | 华南理工大学 | Aeration type convection mixing ink-removing flotation tank |
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| CN102802802A (en) * | 2009-06-24 | 2012-11-28 | 西门子公司 | Pneumatic flotation machine and flotation method |
| CN204530300U (en) * | 2015-03-30 | 2015-08-05 | 哈尔滨商业大学 | Deinking flotation cell |
| CN205347866U (en) * | 2016-01-14 | 2016-06-29 | 河北昌泰纸业有限公司 | Broken deinking device of waste paper |
| CN205856908U (en) * | 2016-06-21 | 2017-01-04 | 泉州华祥纸业有限公司 | A kind of deinking flotation cell |
| CN106573665A (en) * | 2014-05-27 | 2017-04-19 | 埃斯特科股份公司 | Floating structure and method of installing same |
| CN207159673U (en) * | 2017-09-01 | 2018-03-30 | 玖龙纸业（太仓）有限公司 | A kind of use for laboratory Deinking Pulp flotation unit |
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2017
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|---|---|---|---|---|
| CN2269415Y (en) * | 1996-08-05 | 1997-12-03 | 诸城市造纸设备制造厂 | Floatation and ink removing machine for waste paper |
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| EP1029975A1 (en) * | 1999-02-16 | 2000-08-23 | Voith Sulzer Papiertechnik Patent GmbH | Method for removing impurities from an aqueous fibre suspension |
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| Publication number | Publication date |
|---|---|
| CN107401076A (en) | 2017-11-28 |
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