CN111962323A - Improve pressure screen of thick liquids screening quality - Google Patents
Improve pressure screen of thick liquids screening quality Download PDFInfo
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- CN111962323A CN111962323A CN202010798540.4A CN202010798540A CN111962323A CN 111962323 A CN111962323 A CN 111962323A CN 202010798540 A CN202010798540 A CN 202010798540A CN 111962323 A CN111962323 A CN 111962323A
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- rotor
- screen
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- 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
- D21D5/023—Stationary screen-drums
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Abstract
The invention relates to the field of papermaking equipment, in particular to a pressure screen for improving the screening quality of slurry, which comprises a screen cylinder, a screen drum arranged in the screen cylinder, a rotor arranged in the screen drum and power equipment fixedly connected with the rotor, wherein the rotor comprises a rotor cylinder body, and rotor wings are arranged on the outer side of the rotor cylinder body in a circumferential staggered manner; the rotor wing comprises a transverse rotor wing and a longitudinal rotor wing, one end of the transverse rotor wing is fixedly connected with the rotor barrel, and the other end of the transverse rotor wing is fixedly connected with the longitudinal rotor wing; the longitudinal rotor wing is provided with an inner side surface close to the rotor cylinder, and an action surface close to the screen drum; the invention reduces the rotating speed of the rotor by reducing the diameter of the driving wheel, reduces the pulse to the pulp during screening by matching with the rotor and the screen drum modification, improves the removal rate of sticky substances and improves the screening quality, and the reduction of the width of the bars of the screen drum of the pressure screen and the adoption of the plug-in type screen drum make up for the yield loss caused by low rotating speed and low pulse, thereby stabilizing the speed of the paper machine and improving the yield of the paper machine under the condition of improving the running quality and the finished quality of the paper machine.
Description
Technical Field
The invention relates to the field of papermaking equipment, in particular to a pressure screen for improving the screening quality of slurry.
Background
With the rapid development of the paper making industry, the utilization rate of domestic waste paper is improved year by year, the recycling frequency of the waste paper is also improved year by year, the strength of the waste paper is in a descending trend, in order to improve the strength of finished paper, chemical additives such as dry strength agents, wet strength agents, amphoteric starch, sizing agents and the like are used more and more in each paper mill, while the large-scale use of chemicals brings more and more problems to the recycling of the waste paper, and particularly, the auxiliary agents such as amphoteric starch, sizing agents, waxing and the like have more stickies, which influence the operation of a paper machine and the appearance quality of the finished paper. An efficient device for removing stickies by using a pressure screen separates the stickies in pulp through the difference of the sizes and physical properties of fibers and the stickies, so that the quality of the pulp is improved, but the method has the following problems: 1. with the increase of stickies in the waste paper, the removal rate of the stickies of the common pressure screen is small, and the process requirements cannot be met; 2. the paper machine develops towards high width and high speed, and the quality is improved while the yield of the paper machine is not influenced.
Disclosure of Invention
The invention aims to provide the pressure screen which has the advantages of high efficiency, rapidness, good screening quality, energy conservation, consumption reduction and high yield and can improve the screening quality of the slurry.
In order to solve the technical problems, the invention adopts the technical scheme that: a pressure screen for improving the screening quality of slurry comprises a screen cylinder, a screen cylinder arranged in the screen cylinder, a rotor arranged in the screen cylinder and power equipment fixedly connected with the rotor, wherein the rotor comprises a rotor cylinder body, and rotor wings are circumferentially arranged on the outer side of the rotor cylinder body in a staggered manner;
the rotor wing comprises a transverse rotor wing and a longitudinal rotor wing, one end of the transverse rotor wing is fixedly connected with the rotor barrel, and the other end of the transverse rotor wing is fixedly connected with the longitudinal rotor wing;
the longitudinal rotor is provided with an inner side surface close to the rotor barrel, and an action surface close to the screen cylinder.
Further, the screen cylinder includes the connecting piece, the connecting piece is equipped with the draw-in groove, the joint has the stick in the draw-in groove.
Furthermore, the connecting piece is provided with at least one, the shape of draw-in groove with the shape looks adaptation of stick, just the draw-in groove with the interference fit of stick.
Furthermore, the bar is formed by combining a first column with a circular cross section and a second column with a polygonal cross section, and the first column and the second column are integrally formed.
Furthermore, the power equipment comprises a motor fixedly connected with the screen drum, a power transmission device fixedly connected with the output end of the motor, a rotating shaft fixedly connected with the power transmission device, and a fixing device arranged on the rotating shaft, wherein the fixing device is connected with the rotor through bolts.
Furthermore, power transmission device includes the action wheel of fixed connection in the motor output, with axis of rotation fixed connection from the driving wheel, and will the action wheel with follow the belt that driving wheel power is connected.
Further, the diameter of the driving wheel is smaller than that of the driven wheel.
Further, fixing device includes punch holder and lower plate, the punch holder with the lower plate all with the axis of rotation is fixed to be cup jointed, punch holder and lower plate are located respectively the both sides of rotor upper wall and lower wall, the punch holder with the lower plate with rotor bolted connection.
Further, the screen drum also comprises a feeding pipe and a discharging pipe.
Furthermore, a slag storage tank is arranged at the bottom end of the screen drum, and a stirring device and a slag discharge port are arranged in the slag storage tank.
Further, agitating unit includes the mount, the mount is fixed in the axis of rotation bottom, the mount is equipped with the scraping piece.
Compared with the prior art, the invention has the advantages and positive effects that:
the invention changes the traditional slurry processing mode of the pressure screen, reduces the rotating speed of the pressure screen rotor by reducing the diameter of the motor belt pulley, and reduces the pulse to the slurry during screening by matching with the modification of the pressure screen rotor and the reduction of the height of the screen cylinder bars of the pressure screen, thereby improving the removal rate of sticky matters and improving the screening quality. The reduction of the diameter of the motor belt pulley of the pressure screen reduces the load of the screen, is beneficial to energy conservation and consumption reduction, and reduces the cost. The reduction of the width of the bars of the pressure screen drum and the adoption of the plug-in type screen drum comprehensively make up for the yield loss caused by low rotating speed and low pulse, thereby stabilizing the speed of the paper machine and improving the yield of the paper machine under the condition of improving the running and the paper quality of the paper machine.
The method for improving the screening quality of the slurry adopts a multi-rotor low-rotation-speed screening mode, reduces pulses generated in the screening process, and adopts a flexible screening mode to improve the screening quality.
The pressure screen drum adopted by the invention increases the screening area of the screen drum by reducing the width of the bars of the screen drum, and makes up the influence of low rotating speed on screening on yield. And the reduction of the height of the screen drum bars is organically combined with the low rotating speed and the multi-rotor, so that the pulse intensity during screening is reduced, and the quality of the slurry is improved.
The method for improving the pulp screening quality greatly improves the removal rate of the stickies screened after the pulp screening is implemented, improves the removal rate of the stickies to over 85 percent from the original 78 to 80 percent, reduces the conditions of paper breaking of the stickies of a paper machine and degradation of wax points of finished paper, and greatly improves the running and the quality of the finished paper of the paper machine.
Drawings
FIG. 1 is a front cross-sectional view of the present invention;
FIG. 2 is a top cross-sectional block diagram of the present invention;
FIG. 3 is a block diagram of the rotor of the present invention;
figure 4 is a block diagram of a rotor of the present invention.
In the figure: the device comprises a screen cylinder-1, a screen cylinder-2, a rotor-3, a power device-4, a rotor cylinder-5, a rotor-6, a transverse rotor-7, a longitudinal rotor-8, an inner side surface-9, an action surface-10, a connecting piece-11, a clamping groove-12, a bar-13, a column-14, a column-15, a motor-16, a power transmission device-17, a rotating shaft-18, a fixing device-19, a driving wheel-20, a driven wheel-21, a belt-22, an upper clamping plate-23, a lower clamping plate-24, a feeding pipe-25, a discharging pipe-26, a slag storage groove-27, a stirring device-28, a slag discharge port-29, a fixed frame-30 and a scraping sheet-31.
Detailed Description
For a better understanding of the present invention, reference is made to the following detailed description and accompanying drawings that illustrate the invention.
As shown in fig. 1-4, a pressure screen for improving the screening quality of slurry, which comprises a screen cylinder 1, a screen cylinder 2 arranged in the screen cylinder 1, a rotor 3 arranged in the screen cylinder 2, and a power device 4 fixedly connected with the rotor 3, wherein the rotor 3 comprises a rotor cylinder 5, rotors 6 are circumferentially staggered outside the rotor cylinder 5, the rotor 3 is driven to rotate by the power device 4, positive pressure and negative pressure are formed on the surface of the rotor in the process of high-speed rotation by the rotors 6, when the power device 4 rotates forwards, the rotors 6 generate positive pressure to press the slurry to the screen cylinder 2, so that qualified fibers and water in the slurry can smoothly pass through screen holes or screen slits of the screen cylinder 2, when the power device 4 rotates backwards, when the rotors 6 generate negative pressure, water outside the screen cylinder 2 is sucked to pass through the screen holes or screen slits to achieve the cleaning effect, and the position of the rotors 6 is arranged to enable the rotors 6 to play a role of combing and guiding to the flow direction of the slurry flow, the combed pulp flow can regularly and tidily flow to the next layer of rotor wing 6, and because the rotor wings 6 are spirally and uniformly arranged, the switching between the rising flow and the falling flow can be carried out by changing the feeding position, so that the adaptability is strong;
the rotor wing 6 comprises a transverse rotor wing 7 and a longitudinal rotor wing 8, one end of the transverse rotor wing 7 is fixedly connected with the rotor barrel 5, and the other end of the transverse rotor wing 7 is fixedly connected with the longitudinal rotor wing 8; vertical rotor 8 is close to 5 sides of rotor barrel and is equipped with medial surface 9, it is equipped with action face 10 to be close to 2 sides of screen drum, the cross-section of vertical rotor 8 is the thick arc in the thin center in both ends or semi-circular, make its action face 10 be the cambered surface of parabola shape's bending, action face 10 both ends are malleation cambered surface and negative pressure cambered surface respectively, the malleation cambered surface is rotor 6 and produces malleation pulse's primary action district, the negative pressure cambered surface is rotor 6 and produces negative pressure pulse's primary action district, rotor 6 of upper and lower integral type changes rotor 3 into many rotors 6, reduce rotor 6 and 2 interbody pulse strength of screen drum, be favorable to the improvement of screening quality, improve the quality of thick liquids.
The screen cylinder 2 comprises a connecting piece 11, the connecting piece 11 is provided with a clamping groove 12, the clamping groove 12 is internally clamped with bars 13, the connecting piece 11 is at least provided with one bar, the shape of the clamping groove 12 is matched with that of the bars 13, the clamping groove 12 is in interference fit with the bars 13, the bars 13 are formed by combining a first column 14 with a second column 15 with a circular cross section and a polygonal cross section, the first column 14 and the second column 15 are integrally formed, the connecting mode of the bars 13 is changed into splicing by welding, the area of a screen seam formed between the bars 13 can be increased, the screening area is increased, compared with the traditional pressure screen cylinder 2, the width of the bars 13 is reduced to 2.3mm by 2.7mm, the passing of slurry is facilitated, and the yield of the slurry is increased. The height of the screen cylinder 2 is reduced to 0.9mm from 1.2, the reduction of the height is matched with the low rotating speed, and the intensity of screening pulse is reduced, so that the screen cylinder is enabled to be in a stable stateThe screening area is from 3.6m2Lifting to 4.0m2The screening area is increased, the throughput of the slurry is improved, the yield of the pressure screen is stabilized, the screening area of the screen cylinder 2 is increased by reducing the width of the bars 13, and the influence of low rotating speed on the screening on the yield is compensated. And the reduction of the height of the bar 13, combined with the low rotation speed and the rotor 3, reduces the pulse intensity during screening and improves the pulp quality.
The power device 4 comprises a motor 16 fixedly connected with the screen cylinder 1, a power transmission device 17 fixedly connected with the output end of the motor 16, a rotating shaft 18 fixedly connected with the power transmission device 17, and a fixing device 19 arranged on the rotating shaft 18, wherein the rotating shaft 18 can be driven by the motor 16 to rotate, the rotor 3 and the rotating shaft 18 can be fixed through a fixing device 19, so that the rotor 3 and the rotating shaft 18 can synchronously rotate, the fixing device 19 is connected with the rotor 3 through a bolt, the power transmission device 17 comprises a driving wheel 20 fixedly connected with the output end of the motor 16, a driven wheel 21 fixedly connected with the rotating shaft 18, and the belt 22 is used for dynamically connecting the driving wheel 20 and the driven wheel 21, the diameter of the driving wheel 20 is smaller than that of the driven wheel 21, the diameter of the driving wheel 20 of the original pressure screen is changed from 355mm to 315mm, and the rotating speed of the pressure screen can be stably reduced. The load of the pressure screen is reduced from 71% to 64% while the rotating speed is reduced, the effects of energy conservation and environmental protection can be achieved, and the power consumption is saved by 221 kWh/day each time.
Sieve section of thick bamboo 1 still includes inlet pipe 25 and discharging pipe 26, 1 bottom of sieve section of thick bamboo is equipped with slag storage tank 27, be equipped with agitating unit 28 and row's cinder notch 29 in the slag storage tank 27, it is provided with the lid to arrange cinder notch 29, agitating unit 28 includes mount 30, mount 30 is fixed in the 18 bottom of axis of rotation, mount 30 is equipped with scrapes piece 31, it link up mutually with 2 inside of screen cylinder to store up cinder notch 27, can't pass through the fibre of screen joint in the screen cylinder 2, impurity etc. can be stored in slag storage tank 27 along screen cylinder 2 descends, discharge through row cinder notch 29 afterwards, can clear up slag storage tank 27 through mount 30 and scraping piece 31, can prevent that fibre etc. from gluing to cause the pollution to new thick liquids on the slag storage tank 27 inner wall.
The working process of the invention is as follows:
when the screening device works, slurry to be screened is fed into the screening device through the feeding pipe 25, the motor 16 can drive the driving wheel 20 to rotate, the driving wheel 20 drives the driven wheel 21 and the rotating shaft 18 to rotate through the belt 22, the rotor 3 can be clamped through the upper clamping plate 23 and the lower clamping plate 24, the rotor 3 can be fixed on the rotating shaft 18, and the rotor 3 and the rotating shaft 18 can synchronously rotate;
when the motor 16 rotates forwards, the positive pressure cambered surface is a main action area of the rotor wing 6 for generating positive pressure pulse, the rotor wing 6 generates positive pressure to press slurry to the screen cylinder 2, so that qualified fibers and water in the slurry are forced to smoothly pass through screen holes or screen gaps of the screen cylinder 2 and then are discharged through the discharge pipe 26;
the slag storage groove 27 is communicated with the inside of the screen cylinder 2, fibers, impurities and the like which cannot pass through screen seams in the screen cylinder 2 can fall into the slag storage groove 27 along the screen cylinder 2 for temporary storage, then are discharged through the slag discharge port 29, and the slag storage groove 27 can be cleaned through the fixing frame 30 and the scraping pieces 31;
when the device needs to wash, introduce water through discharging pipe 26, then with motor 16 reversal, the negative pressure cambered surface is rotor 6 and produces negative pressure pulse's main effect area, and rotor 6 produces the negative pressure, attracts the water in the screen cylinder 2 outside to pass through sieve mesh or screen cut, reaches abluent effect, discharges water through sediment groove 27 and row cinder notch 29 below afterwards.
The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention should be covered by the present patent.
Claims (10)
1. The utility model provides an improve pressure sieve of thick liquids screening quality, includes a sieve section of thick bamboo (1), screen cylinder (2) that set up in a sieve section of thick bamboo (1), set up in rotor (3) in screen cylinder (2), and with rotor (3) fixed connection's power equipment (4), its characterized in that: the rotor (3) comprises a rotor cylinder (5), and rotor wings (6) are arranged on the outer side of the rotor cylinder (5) in a circumferentially staggered mode;
the rotor wing (6) comprises a transverse rotor wing (7) and a longitudinal rotor wing (8), one end of the transverse rotor wing (7) is fixedly connected with the rotor barrel body (5), and the other end of the transverse rotor wing (7) is fixedly connected with the longitudinal rotor wing (8);
the side of the longitudinal rotor (8) close to the rotor cylinder (5) is provided with an inner side surface (9) close to the side of the screen cylinder (2) is provided with an action surface (10).
2. A pressure screen for improving the quality of pulp screening according to claim 1, wherein: the screen cylinder (2) comprises a connecting piece (11), the connecting piece (11) is provided with a clamping groove (12), and a bar (13) is clamped in the clamping groove (12).
3. A pressure screen for improving the quality of pulp screening according to claim 2, wherein: the connecting piece (11) is provided with at least one, the shape of the clamping groove (12) is matched with the shape of the bar (13), and the clamping groove (12) is in interference fit with the bar (13).
4. A pressure screen for improving the quality of pulp screening according to claim 2, wherein: the bar (13) is formed by combining a first column (14) with a circular cross section and a second column (15) with a polygonal cross section, and the first column (14) and the second column (15) are integrally formed.
5. A pressure screen for improving the quality of pulp screening according to claim 1, wherein: the power equipment (4) comprises a motor (16) fixedly connected with the screen drum (1), a power transmission device (17) fixedly connected with the output end of the motor (16), a rotating shaft (18) fixedly connected with the power transmission device (17), and a fixing device (19) arranged on the rotating shaft (18), wherein the fixing device (19) is connected with the rotor (3) through bolts.
6. A pressure screen for improving the quality of pulp screening according to claim 5, wherein: the power transmission device (17) comprises a driving wheel (20) fixedly connected to the output end of the motor (16), a driven wheel (21) fixedly connected with the rotating shaft (18), and a belt (22) for connecting the driving wheel (20) with the driven wheel (21) in a power mode.
7. The pressure screen for improving the screening quality of the pulp according to claim 6, wherein: the diameter of the driving wheel (20) is smaller than that of the driven wheel (21).
8. A pressure screen for improving the quality of pulp screening according to claim 1, wherein: fixing device (16) include punch holder (23) and lower plate (24), punch holder (23) and lower plate (24) all with axis of rotation (18) are fixed to be cup jointed, punch holder (23) and lower plate (24) are located respectively the both sides of the upper wall and the lower wall of rotor (3), punch holder (23) and lower plate (24) with rotor (3) bolted connection.
9. A pressure screen for improving the quality of pulp screening according to claim 1, wherein: sieve section of thick bamboo (1) still includes inlet pipe (25) and discharging pipe (26), sieve section of thick bamboo (1) bottom is equipped with storage slag groove (27), be equipped with agitating unit (28) and row's cinder notch (29) in storage slag groove (27).
10. A pressure screen for improving the quality of pulp screening according to claim 9, wherein: agitating unit (28) are including mount (30), mount (30) are fixed in axis of rotation (18) bottom, mount (30) are equipped with scraping piece (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010798540.4A CN111962323A (en) | 2020-08-10 | 2020-08-10 | Improve pressure screen of thick liquids screening quality |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010798540.4A CN111962323A (en) | 2020-08-10 | 2020-08-10 | Improve pressure screen of thick liquids screening quality |
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| Publication Number | Publication Date |
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| CN111962323A true CN111962323A (en) | 2020-11-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010798540.4A Pending CN111962323A (en) | 2020-08-10 | 2020-08-10 | Improve pressure screen of thick liquids screening quality |
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| CN (1) | CN111962323A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1852550A2 (en) * | 2006-05-02 | 2007-11-07 | Voith Patent GmbH | Method for fractionating and processing a fibre suspension |
| CN201158778Y (en) * | 2008-03-03 | 2008-12-03 | 江西洪都航空工业集团有限责任公司 | Stick screen drum with long direction reinforced stick |
| KR20150113407A (en) * | 2014-03-28 | 2015-10-08 | 주연임 | Paper manufacturing raw material filtering basket recycle method and paper manufacturing raw material filtering basket thereby |
| CN205529663U (en) * | 2016-05-04 | 2016-08-31 | 玖龙纸业（太仓）有限公司 | Processing system of effect is got rid of to gluing thing in improvement waste paper stock |
| CN108468245A (en) * | 2018-05-30 | 2018-08-31 | 山东杰锋机械制造有限公司 | Pressurized screen is streamed before a kind of low pulse mesh of outer-flowing type |
| CN110359309A (en) * | 2019-07-20 | 2019-10-22 | 张斌 | A kind of paper grade (stock) pressurized screen |
| CN110924214A (en) * | 2019-12-26 | 2020-03-27 | 郑州运达造纸设备有限公司 | Rolling type bar screen cylinder |
| CN111364274A (en) * | 2020-04-30 | 2020-07-03 | 郑州磊展科技造纸机械有限公司 | Novel pressure screen |
-
2020
- 2020-08-10 CN CN202010798540.4A patent/CN111962323A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1852550A2 (en) * | 2006-05-02 | 2007-11-07 | Voith Patent GmbH | Method for fractionating and processing a fibre suspension |
| CN201158778Y (en) * | 2008-03-03 | 2008-12-03 | 江西洪都航空工业集团有限责任公司 | Stick screen drum with long direction reinforced stick |
| KR20150113407A (en) * | 2014-03-28 | 2015-10-08 | 주연임 | Paper manufacturing raw material filtering basket recycle method and paper manufacturing raw material filtering basket thereby |
| CN205529663U (en) * | 2016-05-04 | 2016-08-31 | 玖龙纸业（太仓）有限公司 | Processing system of effect is got rid of to gluing thing in improvement waste paper stock |
| CN108468245A (en) * | 2018-05-30 | 2018-08-31 | 山东杰锋机械制造有限公司 | Pressurized screen is streamed before a kind of low pulse mesh of outer-flowing type |
| CN110359309A (en) * | 2019-07-20 | 2019-10-22 | 张斌 | A kind of paper grade (stock) pressurized screen |
| CN110924214A (en) * | 2019-12-26 | 2020-03-27 | 郑州运达造纸设备有限公司 | Rolling type bar screen cylinder |
| CN111364274A (en) * | 2020-04-30 | 2020-07-03 | 郑州磊展科技造纸机械有限公司 | Novel pressure screen |
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Application publication date: 20201120 |
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