CN112391864A - Flotation deinking machine for removing printing ink in waste paper pulp by utilizing air flotation principle - Google Patents
Flotation deinking machine for removing printing ink in waste paper pulp by utilizing air flotation principle Download PDFInfo
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- CN112391864A CN112391864A CN202011266122.7A CN202011266122A CN112391864A CN 112391864 A CN112391864 A CN 112391864A CN 202011266122 A CN202011266122 A CN 202011266122A CN 112391864 A CN112391864 A CN 112391864A
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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
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- 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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Abstract
The invention discloses a flotation deinking machine for removing ink in waste paper pulp by utilizing an air flotation principle, which comprises a closed flotation tank body, wherein the flotation tank body comprises an outer cylinder and an inner cylinder, an ink discharge device is arranged in the inner cylinder, a plurality of good pulp conical grooves are axially arranged outside the inner cylinder at intervals, a guide ring is arranged between the periphery of each good pulp conical groove and the outer cylinder, the guide ring divides the flotation tank body into multistage flotation units which are arranged up and down, a pulp inlet jet flow distributor is arranged on the outer wall of the outer cylinder corresponding to each stage of flotation unit, and a spiral ascending ladder type pulp inlet flow channel is formed on the guide ring; an imitation cone type reinforcing device is arranged in the good pulp conical groove, and the pulp inlet jet flow distributor is of a three-body structure formed by sequentially connecting a pulp inlet conical pipe, a distribution pipe and a pulp outlet conical pipe. The invention has the obvious advantages of high deinking efficiency, high whiteness of deinked pulp, good brightness, high concentration of discharged printing ink, little fiber loss, small occupied area and the like, and meets the requirements of modern paper making industry on the quality of paper pulp.
Description
Technical Field
The invention relates to the technical field of papermaking equipment, in particular to a flotation deinking machine for removing ink in waste paper pulp by utilizing an air flotation principle.
Background
The flotation deinking machine is designed based on a flotation process and is used for deinking treatment of paper pulp. The pulp enters a jet flow distributor under certain pulp inlet pressure, air brought in the jet flow distributor is dispersed into flotation bubbles with optimal diameters to be fully mixed with the pulp, the flotation bubbles enter a flotation unit of a flotation deinking machine in a tangential flow mode, ink adsorbed on the bubbles floats on the liquid surface along with the bubbles and enters an ink collecting groove under certain pressure, and the bubbles can also perform pressure concentration on ink particles stored in the ink collecting groove and are discharged out of the equipment under the action of the pressure. And the slurry after flotation enters a degassing chamber, and the slurry is discharged from a slurry outlet pipe after being fully degassed.
The utility model discloses a jet type flotation deinking machine, its structure is equipped with a plurality of paper pulp jet ejectors on the upper portion of a cylinder, and there is printing ink foam overflow pipe at the cylinder center, and the bottom is equipped with row's thick liquid mouth and passes through steady thick liquid case, and it utilizes jet ejectors spun foam form gas-liquid to rotate suddenly in the cylinder, discharges printing ink foam from the center tube, and paper pulp utilizes centrifugal force to discharge to steady thick liquid case entering second grade flotation from the bottom. The invention has simple structure, less power consumption, less water consumption, good deinking effect, less land occupation and high yield.
The utility model discloses a totally enclosed flotation deinking machine of notice No. CN2637535Y belongs to the papermaking machinery and makes the field, including shell, entering thick liquid mouth, deinking area, interstage stock groove, interstage play thick liquid pipe, good pulp export, oil extraction ink pipe, interstage enter thick liquid mouth, hollow tube, be provided with at least a slice of degasification blade in the interstage stock groove. The utility model has the advantages of low cost, small volume, large productivity and the like.
The utility model discloses a notice number CN 2828112Y's utility model discloses a closed flotation deinking machine, including the shell, advance the thick liquid mouth, deinking area, interstage stock chest, interstage play thick liquid pipe, good pulp export, collection china ink groove, interstage advance thick liquid mouth, hollow tube, be connected with an at least printing ink scraper blade between the top of collection china ink groove and shell. Has the advantages of quick ink removal and good deinking effect.
Notice No. CN 201447631U's utility model discloses a closed deinking machine is equipped with a foam collecting vat in the cell body, is equipped with a plurality of good dressing troughs around the foam collecting vat, and the one end of each good dressing trough all is connected with a self-cleaning jet distributor, washs jet distributor separately and all is connected with a pump through advancing the thick liquid pipe, is equipped with a sediment thick liquid pipe in the bottom of foam collecting vat, and the sediment thick liquid pipe is connected with sediment thick liquid groove. Through the arrangement, compared with the traditional flotation deinking equipment, the removal rate of the printing ink is improved by 10%, and the reduction rate of the whiteness is improved by 10% ISO, so that the aims of saving energy and reducing consumption are fulfilled.
The prior flotation deinking machine comprising the technical scheme has low efficiency and high energy consumption, and the deinked pulp has low whiteness and poor brightness and can not meet the requirements of the modern paper making industry on the quality of the paper pulp.
Disclosure of Invention
The invention aims to provide a flotation deinking machine for removing ink in waste paper pulp by utilizing an air flotation principle.
In order to solve the technical problems, the invention adopts the following technical scheme:
a flotation deinking machine for removing ink in waste paper pulp by utilizing an air flotation principle comprises a closed flotation tank body, wherein the flotation tank body comprises an outer cylinder body and an inner cylinder body arranged at the center of the outer cylinder body, an ink discharging device is arranged in the inner cylinder body, a plurality of good pulp conical grooves are axially arranged outside the inner cylinder body at intervals, a flow guide ring is arranged between the periphery of each good pulp conical groove and the outer cylinder body, the flotation tank body is divided into multistage flotation units which are arranged up and down by the flow guide ring, a pulp inlet is formed in the outer wall of the outer cylinder body corresponding to each stage of flotation unit, a pulp inlet is connected to the pulp inlet and is connected with a pulp jet distributor, the flow guide ring is formed by overlapping a plurality of flow guide plates along the head and the tail of the circumference, the head-tail connection parts of adjacent flow guide plates are supported by upright posts, and each flow guide plate is upwards inclined along the flow direction;
an imitation cone type reinforcing device is arranged in the good pulp conical groove and comprises an imitation cone cylinder which is small at the top and big at the bottom, the imitation cone cylinder is sleeved on the inner cylinder body, the upper end of the imitation cone cylinder is fixedly connected with the inner cylinder body, the lower end of the imitation cone cylinder is fixedly connected with the conical part of the good pulp conical groove, and the lower end of the imitation cone cylinder is provided with a circle of notch; a deaeration chamber is formed between the cone part of the imitation cone cylinder and the good pulp cone groove and the inner cylinder body, and a pulp outlet is connected with the deaeration chamber on the inner cylinder body;
the slurry inlet jet flow distributor is of a three-body structure formed by sequentially connecting a slurry inlet taper pipe, a distribution pipe and a slurry outlet taper pipe, a plurality of jet devices are arranged in the distribution pipe in an array mode, and each jet device is arranged in an axially extending mode; end plates are respectively arranged at two ends of the distribution pipe, through holes are respectively arranged at positions on the end plates corresponding to two ports of the ejector, and the two ports of the ejector are respectively in sealing connection with the corresponding through holes; the side parts of the distribution pipes are respectively connected with an air inlet pipe;
the jet device consists of a drainage device and a jet pipe, the drainage device is coaxially connected with the inlet of the jet pipe, a conical flow guide hole is arranged at the pulp inlet end of the drainage device, and the large-diameter end surface of the conical flow guide hole faces one side of the pulp inlet conical pipe; the middle of the drainage device is provided with a quincunx through hole connected with the small-diameter end of the conical diversion hole;
the jet pipe is sequentially divided into an air chamber section, a diversion conical hole section, a cylindrical hole section and a dispersion conical hole section from slurry inlet to slurry outlet along the axial direction, wherein the air chamber section is connected with the large-diameter end of the diversion conical hole section; the axial length of the diversion conical hole section is smaller than that of the dispersion conical hole section; an air inlet is arranged at the side part of the air chamber section; the quincunx through hole of the flow diverter is communicated with the air chamber section of the jet pipe.
The slurry inlet is formed by a rectangular slurry inlet pipe tangentially connected to the outer barrel, the outlet of the rectangular slurry inlet pipe is tangentially connected with a spiral ascending ladder type slurry inlet flow channel on the flow guide ring, the inlet of the rectangular slurry inlet pipe is connected with a slurry inlet flange, and a slurry inlet jet flow distributor is connected with the slurry inlet flange.
The slurry inlet taper pipe is composed of a frustum section and a cylinder section, wherein the small-diameter end of the frustum section is used as a slurry inlet, the large direct section of the frustum section is in butt joint with the cylinder section, and the other end of the cylinder section is in butt joint with one end of the distribution pipe.
The slurry outlet taper pipe is composed of a frustum section and a cylinder section, wherein the small diameter end of the frustum section is used as a slurry outlet and is connected with a slurry inlet flange, the large direct section of the frustum section is in butt joint with the cylinder section, and the other end of the cylinder section is in butt joint with the other end of the distribution pipe.
The whole drainage device is of a stepped shaft-shaped structure and comprises a large-diameter section and a small-diameter section, the conical diversion hole is located in the large-diameter section, and the quincunx through hole is located in the small-diameter section; the air chamber section of establishing the efflux pipe is inserted to the little diameter section of drainage ware, and the cooperation of the corresponding tip butt of the big diameter section of drainage ware and efflux pipe.
The diameter of the air chamber section is larger than the diameter of the large-diameter end of the diversion conical hole section.
The cross section of the distribution pipe is circular.
And a washing water inlet pipe is arranged on the side, opposite to the air inlet pipe, of the distribution pipe.
The cone-imitating cylinder and the inner cylinder are arranged in a non-coaxial mode.
The upper end of the imitation cone cylinder is also provided with a notch, and the side part of the imitation cone cylinder is provided with a gap.
The invention has the beneficial effects that:
1. the invention forms a multi-stage flotation unit with distinct layers in the flotation tank body, prevents the mixing of the pulp among different flotation stages, and the dispersion of the air and the mixing of the air and the pulp are completed by the pulp inlet jet flow distributor, so that the pulp is internally circulated, the air is repeatedly utilized in the pulp, and the utilization rate of the air and the deinking rate of the pulp are greatly improved. The equipment has the obvious advantages of high deinking efficiency, high whiteness of deinked pulp, high concentration (more than 3 percent) of discharged printing ink, less fiber loss, small occupied area, simple operation and control, low energy consumption and the like, and meets the requirements of the modern paper making industry on the quality of paper pulp.
2. The invention is a totally enclosed structure, and the working principle is as follows: the slurry enters a slurry inlet jet flow distributor through a pump under certain slurry inlet pressure, air brought in the distributor is dispersed into flotation bubbles with optimal diameters to be fully mixed with the slurry, the flotation bubbles enter a flotation unit in a tangential flow mode, ink adsorbed on the bubbles floats on the liquid surface along with the bubbles, enters an ink discharge device under certain pressure, and is concentrated and discharged out of equipment under certain pressure. The slurry after flotation enters a degassing chamber of the good pulp conical tank, and the slurry enters a slurry outlet after being fully degassed.
The flotation cell body is divided into a plurality of stages of flotation cells (3-5 stages of flotation cells can be arranged in the flotation cell body and are divided into a first-stage flotation cell, a second-stage flotation cell and a third-stage flotation cell of … … degrees from top to bottom), a spiral ascending ladder type slurry inlet flow channel is formed on the flow guide ring, different stages of slurry can be separated independently, mixing of different stages of slurry is avoided, air bubbles in the next stage of slurry are not prevented from moving to the previous stage of slurry, and therefore flotation quality is improved. Meanwhile, because the air entering the equipment can be utilized to the maximum extent, the air brought by the second-stage flotation can be completely utilized by the second-stage flotation and the pulp entering the first-stage flotation except that the air brought by the first-stage flotation can only be utilized by the first-stage flotation alone, and the utilization rate is doubled; air brought by the third-stage flotation is not only utilized by the third stage, but also recycled by the second stage and the first stage, namely the utilization rate is improved by two times; by analogy, the air brought by the fourth-stage flotation can be utilized for four times, and the air utilization rate is improved by three times; the air brought by the fifth stage flotation can be used for five times, and the air utilization rate is improved by four times. Therefore, the flotation efficiency is greatly improved, and the ink removal rate reaches more than 95% (three levels) and more than 99% (five levels), so that the flotation efficiency is greatly improved.
4. According to the invention, the cone-imitating type reinforcing device is arranged in the accept pulp conical groove, the deaeration chamber is formed between the cone-imitating cylinder of the cone-imitating type reinforcing device and the cone part of the accept pulp conical groove and the inner cylinder body, the inner cylinder body is connected with the deaeration chamber and is provided with the pulp outlet, the floated pulp enters the deaeration chamber, and the pulp is discharged from the pulp outlet after being fully deaerated.
5. The flotation tank structure of the invention greatly improves the flotation deinking efficiency of the pulp, and the deinked pulp has high whiteness and good brightness.
6. The invention changes the circular pipe integral straight-through structure of the old pulp-feeding jet distributor into a cone pipe three-body structure, enlarges the volume of the middle distributor, expands more channels for installing jet devices, promotes more air to be mixed with the pulp, and realizes the requirement of the pulp-feeding jet distributor of the flotation deinking machine on the full mixing of the flotation bubbles and the pulp, the air of which is dispersed into the optimal diameter, in the distributor.
The invention changes the front end of the circular hole of the jet pipe into a flow guiding short conical surface structure and the rear end into a long dispersion conical surface structure, thereby enlarging the volume of the air mixed slurry flow and promoting the air in the mixed slurry flow to be dispersed into flotation bubbles with optimal diameters to be further fully mixed with slurry.
The invention changes the plane structure of the pulp inlet end of the drainage device for the old pulp inlet jet distributor into a conical surface structure; the quincunx structure is changed from the circular hole for pulp inlet of the flow diverter for the old pulp-inlet jet distributor, so that the surface area of pulp flow is enlarged, and air brought in the distributor is fully mixed with pulp.
Drawings
FIG. 1 is a front view of the flotation deinking machine of the present example;
FIG. 2 is a left side view of the flotation deinking machine of the present example;
FIG. 3 is a top view of the flotation deinking machine of the present example;
figure 4 is a cross-sectional view of the flotation cell body in this embodiment;
fig. 5 is a first schematic perspective view of the deflector ring in this embodiment:
fig. 6 is a second schematic perspective view of the deflector ring in this embodiment:
FIG. 7 is a top view of the region of the conoid reinforcement device of this embodiment;
FIG. 8 is a schematic cross-sectional view C-C of FIG. 7;
FIG. 9 is a schematic view of a cone of the embodiment of the pseudo-cone reinforcement device;
FIG. 10 is a schematic view of the construction of the jet distributor according to the present embodiment;
FIG. 11 is a side view of FIG. 10;
fig. 12 is a schematic structural view of the ejector in the present embodiment;
FIG. 13 is a schematic structural view of a jet pipe in the present embodiment;
FIG. 14 is a schematic sectional view taken along line A-A in FIG. 13;
FIG. 15 is a perspective view of the flow diverter of this embodiment;
FIG. 16 is a side view of the flow diverter of this embodiment;
fig. 17 is a schematic sectional view taken along line B-B in fig. 16.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings.
As shown in fig. 1 to 17, the present embodiment discloses a flotation deinking machine for removing ink from waste paper pulp by using air flotation principle, which comprises a closed flotation tank 5, wherein the flotation tank 5 comprises an outer cylinder 51 and an inner cylinder 52 arranged at the center of the outer cylinder 51, and the top of the outer cylinder 51 is provided with an upper cover 50 for sealing. An ink discharge device 53 is disposed inside the inner cylinder 52. A plurality of accepted pulp conical grooves 54 are axially arranged at intervals outside the inner cylinder 52, a flow guide ring 55 is arranged between the periphery of each accepted pulp conical groove 54 and the outer cylinder 51, the flow guide ring 55 divides the flotation cell body 5 into multi-stage flotation cells which are arranged from top to bottom, pulp inlets are arranged at the positions corresponding to the flotation cells on the outer wall of the outer cylinder 51, and the pulp inlets are connected with pulp inlet jet flow distributors 10. The bottom of the outer cylinder is also provided with a drain 57.
The improved pulp cone groove 54 is composed of a cone part with a large upper part and a small lower part and a cylindrical part butted with the upper end of the cone part, an imitation cone type reinforcing device is arranged in the improved pulp cone groove 54 and comprises an imitation cone cylinder 6 with a small upper part and a large lower part, the imitation cone cylinder 6 is sleeved on the inner cylinder body 52, and the imitation cone cylinder 6 and the inner cylinder body 52 are not coaxially arranged. The upper end of the imitation cone cylinder 6 is fixedly connected with the inner cylinder body 52, the lower end of the imitation cone cylinder 6 is fixedly connected with the cone part of the good pulp cone groove 54, a circle of rectangular notch 63 is formed in the lower end of the imitation cone cylinder 6, a rectangular notch 64 is also formed in the upper end of the imitation cone cylinder 6, and a gap 65 is formed in the side part of the imitation cone cylinder 6.
A deaeration chamber 61 is formed between the cone parts of the imitation cone cylinder 6 and the accepted pulp cone groove 54 and the inner cylinder body 52, and a pulp outlet 62 is arranged on the inner cylinder body 52 and connected with the deaeration chamber 61.
In the embodiment, a specially-shaped deaeration chamber is formed in the accept pulp conical groove 54 through a conical reinforcing device, the floated pulp enters the deaeration chamber, and the pulp is sufficiently deaerated and discharged from a pulp outlet.
The guide ring 55 is formed by overlapping a plurality of guide plates 551 end to end along the circumference, the end-to-end connection of adjacent guide plates 551 is supported by the upright post 552, and each guide plate 551 is inclined upwards along the slurry flow direction, so that a spiral ascending ladder type slurry inlet flow channel is formed on the guide ring.
The deflector ring 55 in this embodiment is improved to a spiral-up ladder-type slurry inlet flow channel relative to an old flat circular groove-type slurry inlet flow channel, and the spiral-up ladder-type slurry inlet flow channel can form a driving force for floating flotation bubbles, so that the flotation efficiency is improved.
In the embodiment, the flotation tank body 5 is divided into a plurality of stages of flotation units (the flotation tank body can be provided with 3-5 stages of flotation units which are divided into a first-stage flotation unit, a second-stage flotation unit and a third-stage flotation unit … … from top to bottom), a spiral ascending ladder type slurry inlet flow channel is formed on the flow guide ring 55, different stages of slurry can be separated independently, mixing of different stages of slurry is avoided, air bubbles in the next stage of slurry are not prevented from moving to the previous stage of slurry, and therefore the flotation quality is improved.
Meanwhile, because the air entering the equipment can be utilized to the maximum extent, the air brought by the second-stage flotation can be completely utilized by the second-stage flotation and the pulp entering the first-stage flotation except that the air brought by the first-stage flotation can only be utilized by the first-stage flotation alone, and the utilization rate is doubled; air brought by the third-stage flotation is not only utilized by the third stage, but also recycled by the second stage and the first stage, namely the utilization rate is improved by two times; by analogy, the air brought by the fourth-stage flotation can be utilized for four times, and the air utilization rate is improved by three times; the air brought by the fifth stage flotation can be used for five times, and the air utilization rate is improved by four times. Therefore, the flotation efficiency is greatly improved, and the ink removal rate reaches more than 95% (three levels) and more than 99% (five levels), so that the flotation efficiency is greatly improved.
The flotation cell body is further provided with an explosion-proof device 56 on the outer cylinder body 51 for controlling the pressure in the cell body. The explosion-proof device is the prior art, and the embodiment is not described in detail.
The flotation tank body structure of the embodiment greatly improves the flotation deinking efficiency of the pulp, and the deinked pulp has high whiteness and good brightness.
In this embodiment, the slurry inlet is formed by a rectangular slurry inlet pipe 71 tangentially connected to the outer cylinder 51, an outlet of the rectangular slurry inlet pipe 71 is tangentially connected to the spiral ascending ladder-type slurry inlet flow channel on the guide ring 55, an inlet of the rectangular slurry inlet pipe 71 is connected to a slurry inlet flange 72, and the slurry inlet jet distributor 10 is connected to the slurry inlet flange 72.
In this embodiment, the ink discharging device 53 is an ink collecting duct. In the flotation tank body, the ink adsorbed on the bubbles floats on the liquid surface along with the bubbles and enters the ink collecting duct under certain pressure, and the bubbles can also perform pressure concentration on ink particles stored in the ink collecting duct and discharge the ink particles out of the equipment under the action of the pressure. The concentration of the discharged ink is higher than 3%, and the fiber loss is less.
The slurry inlet jet flow distributor is of a three-body structure formed by sequentially connecting a slurry inlet conical pipe 11, a distribution pipe 12 and a slurry outlet conical pipe 13, a plurality of jet devices are arranged in the distribution pipe 12 in an array mode, and each jet device extends along the axial direction; end plates are respectively arranged at two ends of the distribution pipe 12, through holes are respectively arranged at positions on the end plates 12 corresponding to two ports of the ejector, and the two ports of the ejector are respectively in sealing connection with the corresponding through holes. The sides of the distribution pipe 12 are connected to an air inlet pipe 21 and a washing water inlet pipe 22, respectively.
In this embodiment, the distribution pipe 12 is circular in cross-section.
In the embodiment, an integral straight-through structure of a round pipe of an old pulp inlet jet flow distributor is changed into a cone pipe three-body structure, the volume of the middle distributor is enlarged, and the ejector is installed and expanded to sixteen channels, so that more air and slurry are mixed.
The jet device consists of a flow diverter 3 and a jet pipe 4, and the flow diverter 3 is coaxially connected with the inlet of the jet pipe 4.
The drainage device 3 is provided with a conical diversion hole 31 at one end of the slurry inlet, and the large-diameter end surface of the conical diversion hole 31 faces one side of the slurry inlet taper pipe 11; the middle of the flow diverter 3 is provided with a quincunx through hole 32 connected with the small-diameter end of the conical flow diversion hole 31.
In this embodiment, the drainage ware entry is made by a cylindrical polytetrafluoroethylene, advances thick liquid end with the drainage ware entry and makes into the circular conical surface structure, advances thick liquid round hole and changes into quincunx structure. The conical surface structure plays a role in guiding the slurry, and the hole with the quincunx structure enlarges the surface area of the slurry flow, so that the air brought in the distributor is fully mixed with the slurry.
The jet pipe 4 is sequentially divided into an air chamber section 41, a flow guiding conical hole section 42, a cylindrical hole section 43 and a dispersing conical hole section 44 along the axial direction from slurry inlet to slurry outlet, wherein the air chamber section 41 is connected with the large-diameter end of the flow guiding conical hole section 42, and the diameter of the air chamber section 41 is larger than that of the large-diameter end of the flow guiding conical hole section 42. The small diameter end of the diversion conical hole section 42 is in equal diameter butt joint with the cylindrical hole section 43, the other end of the cylindrical hole section 43 is in equal diameter butt joint with the small diameter end of the dispersion conical hole section 44, and the large diameter end face of the dispersion conical hole section 44 faces the slurry outlet conical pipe 13. The axial length of the inducer conical bore section 42 is less than the axial length of the dispersion conical bore section 44. The side of the air chamber section 41 is also provided with an air inlet 45.
The quincunx through hole of the flow diverter 2 is communicated with the air chamber section 41 of the jet pipe 4.
In this embodiment, the jet pipe 4 is formed by processing a long cylindrical nylon rod, the front end of the round hole of the jet pipe for the old pulp-feeding jet distributor is changed into a flow-guiding short conical surface structure, and the rear end of the round hole of the jet pipe is changed into a long dispersion conical surface structure, so that the volume of the air mixed pulp flow is enlarged, and the air in the mixed pulp flow is dispersed into flotation bubbles with the optimal diameter to be further fully mixed with the pulp.
In this embodiment, the whole step shaft column structure that is of flow diverter 3, it includes big diameter section and minor diameter section, and toper water conservancy diversion hole 31 is located big diameter section, and 32 holes on the plum blossom shape lead to are located minor diameter section.
When drainage device 3 and efflux pipe 4 assembled, the air chamber section 41 of establishing efflux pipe 4 is inserted to the small diameter section of drainage device 3, and the air inlet 45 exposes to be guaranteed to the depth of insertion of the small diameter section of drainage device 3. The large-diameter section of the flow diverter 3 is matched with the corresponding end part of the jet pipe 4 in an abutting mode.
In this embodiment, the slurry inlet taper pipe 11 is composed of a frustum section and a cylinder section, wherein the small diameter end of the frustum section is used as a slurry inlet, the large direct section of the frustum section is butted with the cylinder section, and the other end of the cylinder section is butted with one end of the distribution pipe.
In this embodiment, the slurry outlet taper pipe 13 is composed of a taper section and a cylinder section, wherein the small diameter end of the taper section is used as a slurry outlet and is connected with the slurry inlet flange 72, and a slurry gate valve 73 is arranged at the connection position of the slurry outlet taper pipe 13 and the slurry inlet flange 72. The large direct section of the cone section is in butt joint with the cylinder section, and the other end of the cylinder section is in butt joint with the other end of the distribution pipe.
When the flotation deinking machine works, the pulp disperses air in the mixed pulp in the distributor into flotation bubbles with the optimal diameter through the inlet of the flow diverter and the jet pipe to be fully mixed with the pulp, and finally the flotation bubbles enter the flotation deinking machine in the form of tangent flow.
The pulp inlet jet flow distributor of the embodiment can bring air into pulp, disperse the air into flotation bubbles with the optimal diameter and mix the flotation bubbles with pulp, can achieve the optimal state only by simple adjustment, and can be started or stopped at any time without affecting the pulp outlet quality, thereby realizing the requirement of the flotation deinking machine on the full mixing of the flotation bubbles and the pulp, the air of which is brought into the optimal diameter in the distributor. At the same time, the ratio of air to slurry can be adjusted, thus achieving both superior and stable removal performance for ink particles and light weight in a wide size range.
The flotation deinking machine of the embodiment is a totally enclosed structure, and the working principle is as follows: the slurry enters a slurry inlet jet flow distributor through a pump under certain slurry inlet pressure, air brought in the distributor is dispersed into flotation bubbles with optimal diameters to be fully mixed with the slurry, the flotation bubbles enter a flotation unit in a tangential flow mode, ink adsorbed on the bubbles floats on the liquid surface along with the bubbles, enters an ink discharge device under certain pressure, and is concentrated and discharged out of equipment under certain pressure. The slurry after flotation enters a degassing chamber of the good pulp conical tank, and the slurry enters a slurry outlet after being fully degassed.
The flotation deinking machine of the embodiment forms a multi-stage flotation unit with distinct layers in the flotation tank body, prevents the mixing of the pulp among different flotation stages, and the dispersion of the air and the mixing of the air and the pulp are completed by the pulp inlet jet flow distributor, so that the pulp is internally circulated, the air is repeatedly utilized in the pulp, and the utilization rate of the air and the deinking rate of the pulp are greatly improved. The equipment has the obvious advantages of high deinking efficiency, high whiteness of deinked pulp, high concentration (more than 3 percent) of discharged printing ink, less fiber loss, small occupied area, simple operation and control, low energy consumption and the like, and meets the requirements of the modern paper making industry on the quality of paper pulp.
Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that: modifications and equivalents may be made thereto without departing from the spirit and scope of the invention and it is intended to cover in the claims the invention as defined in the appended claims.
In the description of the present invention, it is to be understood that the terms "front", "rear", "upper", "lower", "left", "right", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the scope of the present invention.
Claims (10)
1. The utility model provides an utilize flotation deinking machine of printing ink in air supporting principle desorption waste paper pulp, including closed flotation cell body, the flotation cell body includes outer barrel and the interior barrel that sets up at outer barrel center, the internal printing ink eduction gear that has arranged of inner barrel, interior barrel has a plurality of good thick liquid taper groove along axial interval arrangement outward, all be equipped with the water conservancy diversion ring between the periphery of every good thick liquid taper groove and the outer barrel, the multistage flotation unit of arranging about the water conservancy diversion ring divide into the flotation cell body, correspond the department with every grade flotation unit on the outer wall of outer barrel and all be equipped with into the thick liquid mouth, it all is connected with into thick liquid efflux distributor to advance thick liquid mouth department, a serial communication port: the flow guide ring is formed by overlapping a plurality of flow guide plates along the circumference from head to tail, the head-tail connection part of the adjacent flow guide plates is supported by a stand column, and each flow guide plate is inclined upwards along the flow direction of slurry, so that a spiral ascending ladder type slurry inlet flow channel is formed on the flow guide ring;
an imitation cone type reinforcing device is arranged in the good pulp conical groove and comprises an imitation cone cylinder which is small at the top and big at the bottom, the imitation cone cylinder is sleeved on the inner cylinder body, the upper end of the imitation cone cylinder is fixedly connected with the inner cylinder body, the lower end of the imitation cone cylinder is fixedly connected with the conical part of the good pulp conical groove, and the lower end of the imitation cone cylinder is provided with a circle of notch; a deaeration chamber is formed between the cone part of the imitation cone cylinder and the good pulp cone groove and the inner cylinder body, and a pulp outlet is connected with the deaeration chamber on the inner cylinder body;
the slurry inlet jet flow distributor is of a three-body structure formed by sequentially connecting a slurry inlet taper pipe, a distribution pipe and a slurry outlet taper pipe, a plurality of jet devices are arranged in the distribution pipe in an array mode, and each jet device is arranged in an axially extending mode; end plates are respectively arranged at two ends of the distribution pipe, through holes are respectively arranged at positions on the end plates corresponding to two ports of the ejector, and the two ports of the ejector are respectively in sealing connection with the corresponding through holes; the side parts of the distribution pipes are respectively connected with an air inlet pipe;
the jet device consists of a drainage device and a jet pipe, the drainage device is coaxially connected with the inlet of the jet pipe, a conical flow guide hole is arranged at the pulp inlet end of the drainage device, and the large-diameter end surface of the conical flow guide hole faces one side of the pulp inlet conical pipe; the middle of the drainage device is provided with a quincunx through hole connected with the small-diameter end of the conical diversion hole;
the jet pipe is sequentially divided into an air chamber section, a diversion conical hole section, a cylindrical hole section and a dispersion conical hole section from slurry inlet to slurry outlet along the axial direction, wherein the air chamber section is connected with the large-diameter end of the diversion conical hole section; the axial length of the diversion conical hole section is smaller than that of the dispersion conical hole section; an air inlet is arranged at the side part of the air chamber section; the quincunx through hole of the flow diverter is communicated with the air chamber section of the jet pipe.
2. The flotation deinking machine for removing ink from waste paper pulp by utilizing the air flotation principle as claimed in claim 1, characterized in that: the slurry inlet is formed by a rectangular slurry inlet pipe tangentially connected to the outer barrel, the outlet of the rectangular slurry inlet pipe is tangentially connected with a spiral ascending ladder type slurry inlet flow channel on the flow guide ring, the inlet of the rectangular slurry inlet pipe is connected with a slurry inlet flange, and a slurry inlet jet flow distributor is connected with the slurry inlet flange.
3. The flotation deinking machine for deinking ink from waste paper pulp by utilizing the air flotation principle as claimed in claim 2, characterized in that: the slurry inlet taper pipe is composed of a frustum section and a cylinder section, wherein the small-diameter end of the frustum section is used as a slurry inlet, the large direct section of the frustum section is in butt joint with the cylinder section, and the other end of the cylinder section is in butt joint with one end of the distribution pipe.
4. The flotation deinking machine for deinking ink from waste paper pulp by utilizing the air flotation principle as claimed in claim 2, characterized in that: the slurry outlet taper pipe is composed of a frustum section and a cylinder section, wherein the small diameter end of the frustum section is used as a slurry outlet and is connected with a slurry inlet flange, the large direct section of the frustum section is in butt joint with the cylinder section, and the other end of the cylinder section is in butt joint with the other end of the distribution pipe.
5. The flotation deinking machine for removing ink from waste paper pulp by utilizing the air flotation principle as claimed in claim 1, characterized in that: the whole drainage device is of a stepped shaft-shaped structure and comprises a large-diameter section and a small-diameter section, the conical diversion hole is located in the large-diameter section, and the quincunx through hole is located in the small-diameter section; the air chamber section of establishing the efflux pipe is inserted to the little diameter section of drainage ware, and the cooperation of the corresponding tip butt of the big diameter section of drainage ware and efflux pipe.
6. The flotation deinking machine for removing ink from waste paper pulp by utilizing the air flotation principle as claimed in claim 1, characterized in that: the diameter of the air chamber section is larger than the diameter of the large-diameter end of the diversion conical hole section.
7. The flotation deinking machine for removing ink from waste paper pulp by utilizing the air flotation principle as claimed in claim 1, characterized in that: the cross section of the distribution pipe is circular.
8. The flotation deinking machine for removing ink from waste paper pulp by utilizing the air flotation principle as claimed in claim 1, characterized in that: and a washing water inlet pipe is arranged on the side, opposite to the air inlet pipe, of the distribution pipe.
9. The flotation deinking machine for deinking ink from waste paper pulp by utilizing the air flotation principle as recited in any one of claims 1 to 8, wherein: the cone-imitating cylinder and the inner cylinder are arranged in a non-coaxial mode.
10. The flotation deinking machine for deinking ink from waste paper pulp by utilizing the air flotation principle as claimed in claim 9, characterized in that: the upper end of the imitation cone cylinder is also provided with a notch, and the side part of the imitation cone cylinder is provided with a gap.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011266122.7A CN112391864B (en) | 2020-11-13 | 2020-11-13 | Flotation deinking machine for removing printing ink in waste paper pulp by utilizing air flotation principle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011266122.7A CN112391864B (en) | 2020-11-13 | 2020-11-13 | Flotation deinking machine for removing printing ink in waste paper pulp by utilizing air flotation principle |
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| CN112391864A true CN112391864A (en) | 2021-02-23 |
| CN112391864B CN112391864B (en) | 2023-06-20 |
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| CN202011266122.7A Active CN112391864B (en) | 2020-11-13 | 2020-11-13 | Flotation deinking machine for removing printing ink in waste paper pulp by utilizing air flotation principle |
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| CN (1) | CN112391864B (en) |
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| CN112391864B (en) | 2023-06-20 |
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