CN101649572B - Top unloader of pressure type upwash bleaching tower - Google Patents
Top unloader of pressure type upwash bleaching tower Download PDFInfo
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- CN101649572B CN101649572B CN2009101705386A CN200910170538A CN101649572B CN 101649572 B CN101649572 B CN 101649572B CN 2009101705386 A CN2009101705386 A CN 2009101705386A CN 200910170538 A CN200910170538 A CN 200910170538A CN 101649572 B CN101649572 B CN 101649572B
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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
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- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
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Abstract
The invention discloses a top unloader of a pressure type upwash tower, comprising a rotary pulp discharging barrel, a pulp scraping plate, a pulp storage box, Morse's taper connection, a helical band, a bracket, a rotating shaft, a shaft joint and a variable-frequency motor, wherein the variable-frequency motor is connected with the rotating shaft through the shaft joint, and the rotating shaft is in Morse's taper connection with the rotary pulp discharging barrel; the upper end and the lower end of the rotary pulp discharging barrel are both sealed, the helical band is arranged inside the rotary pulp discharging barrel, pulp inlets are arranged at the left side and the right side of the rotary pulp discharging barrel, a rectangular pulp outlet is arranged in the tangential direction of the helical band and communicated with the pulp storage box; and the lower end of the rotary pulp discharging barrel is connected with the pulp scraping plate. The variable-frequency motor controls the rotating shaft and the rotary pulp discharging barrel internally provided with the helical band to rotate together, and the pulp scraping plate also rotates along with the rotating shaft and the rotary pulp discharging barrel; in addition, paper pulp enters from the two pulp inlets at the sides of the rotary pulp discharging barrel and helically raises in the rotary pulp discharging barrel to form powerful overfall, thereby better dispersing the paper pulp and reducing the flow resistance.
Description
Technical field
The present invention relates to the paper pulp discharger in the pulping and paper-making, specifically relate to a kind of pressure type cat head discharger of up-flow bleaching tower.
Background technology
At present, the top unloader of pressure type upwash bleaching tower of China mainly is divided into two kinds: a kind of is to belong to mechanical scraper-type, utilize the rotation of two rake arms of symmetry, scraper plate on the rake arm ceaselessly is in cat head the paper pulp of viscous flow and scrapes to outlet, this discharger need be harrowed arm and be had higher intensity, because the flow resistance of middle concentration paper pulp is bigger, the required energy consumption of this discharger is higher.And in a single day this discharger runs into fortuitous event; for example short time shutdown or production time have been grown occasionally; the long-pending slurry of some places will be serious; gap between scraper plate and the tower wall can be more and more littler, and the gap of some places may be filled in extremely fully, and pulp will be very difficult like this; discharger is with regard to cisco unity malfunction; can only shut down and manually scrape slurry and maintenance, slurry also can often be amassed in the place that the while scraping blade can not get at.Another discharger then is to utilize the high speed rotor rotated to make cat head paper pulp produce fluidisation, makes it have the seemingly flow behavior of water, flows out upflow tower under the effect of tower top pressure.This discharger is equipped with grout outlet usually on the upper cover of bleaching tower, have in the grout outlet and do not stop the high speed rotor rotated, then from the side pulp, this method pulp ratio is easier to, but to the designing requirement of rotor than higher, the rotor shapes design is bad, hanging easily, and, more need special rotor for this viscoelastic body of middle high consistency pulp, because the tower inside and outside differential pressure is bigger, route is shorter, and flow resistance is smaller, short circuit might occur, most critical be the place of the cat head end socket of up-flow bleaching tower except grout outlet, all the other can be because do not scrape lodicule, not outlet again, and the time has been grown the long-pending slurry of meeting, thereby influence the paper pulp discharging, need the long-pending slurry of labor cleaning equally.So domestic following shortcoming of up-flow bleaching tower cat head discharger ubiquity: (1) needs artificial periodic cleaning than being easier to long-pending slurry; The needs that have are more often cleared up; This is a cumbersome problem.(2) the paper pulp fluid occurs short circuit easily or opens circuit, opening circuit to cause to carry paper pulp to go out, and the short circuit meeting makes the pressure of paper pulp ejection bigger, is unfavorable for causing the operating load of motor to increase behind the long-pending slurry of industrial production (3), even transmission system is gone wrong.
The up-flow bleaching tower cat head discharger of external SUNDS company is a material scraper with umbrella shape scraper plate, in umbrella shape scraper plate rotary course, paper pulp is scraped into the tower central area around tower, and sprayed from cat head axle center plasma discharge mouth.This discharger has scrapes slurry and the incorporate effect of pulp, so the paper pulp outflow can be more smooth and easy, meanwhile scrape slurry and is also carrying out, so the possibility of long-pending slurry is little a lot.But this discharger is owing to have only a grout outlet, and pulp is inhomogeneous; And umbrella shape is scraped lodicule can be powerless to long-pending slurry more of long duration.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, provide that a kind of pulp is even, the suffered flow resistance of slurry is little, long-pending slurry is handled in time, and the effective and energy-conservation top unloader of pressure type upwash bleaching tower of pulp.
Purpose of the present invention is achieved through the following technical solutions:
Top unloader of pressure type upwash bleaching tower comprises variable-frequency motor, shaft coupling, last angular contact ball bearing, rotating shaft, following angular contact ball bearing, rotation pulp tube, slurry-storing box body, cushion block, mechanical seal, support and scrapes lodicule; Described variable-frequency motor is connected by shaft coupling with rotating shaft, and rotating shaft adopts Morse's taper to be connected with rotation pulp tube; In the lower end of shaft coupling, be provided with the last angular contact ball bearing and the following angular contact ball bearing of fixing and supporting rotating shaft on the rotating shaft from top to bottom successively, last angular contact ball bearing and following angular contact ball bearing are fixed on the support; Mechanical seal is arranged on the outside of rotation pulp tube, is positioned at the both sides up and down of slurry-storing box body; The slurry-storing box body is arranged on rotation pulp tube periphery, is connected with support by cushion block; The upper and lower end of rotation pulp tube all seals, and is provided with hurricane band in the inside of rotation pulp tube, and the starting point of hurricane band is in the lower edge of the stock inlet of rotation pulp tube, and terminal point is in the upper edge of its grout outlet, and its pitch is 140-180mm; Stock inlet is arranged on the rotation pulp tube left and right sides, and rectangular grout outlet is arranged on the hurricane band tangential direction, is communicated with slurry-storing box, the lower end that rotates the pulp tube with scrape lodicule and be connected;
For further realizing the object of the invention, the described lodicule of scraping is made up of 2 positives and 6 bluff bits, all is the cutter shape, and wherein the thickness of point of a knife is 0.5mm; Two positives all are welded on the clip, and bluff bit and positive vertical welding mutually.
The lower end of described rotation pulp tube with scrape lodicule and preferably adopt clamp connection.
Mechanical seal is preferably integrated mechanical sealing.
Welded 6 cushion blocks on the described slurry-storing box body slurry-storing box body, slurry-storing box is fixed on the support; The global shape of slurry-storing box is similar to the inside of support.
Described rotating shaft is preferably No. 45 steel and makes.
Compare with existing technology, the present invention has following advantage and beneficial effect:
(1) because two stock inlet symmetries of rotation pulp tube side, and rotation, make the paper pulp discharging in the bleaching tower more even, and paper pulp enter from the side of rotation pulp tube, make the paper pulp discharging short circuit phenomenon can not occur;
(2) because there is hurricane band rotation pulp tube inside, can rise by spiral after paper pulp enters, the power that this can make paper pulp obtain advancing has reduced flow resistance;
(3), make paper pulp at the good simple property pressure vortex of the inner formation of rotation pulp tube because paper pulp throws away from the tangential direction of rotating the pulp tube, and this tangential direction is consistent with the rotation direction of hurricane band.
(4), make and scrape slurry dynamics is arranged very much because positive and the bluff bit of scraping paddle all are blade-like.When the long-pending slurry of bleaching tower inwall, effect is fine especially.
(5) slurry-storing box body of the present invention is used with rotation pulp tube, and its pulp flange-interface is in the bottom of slurry-storing box body, and institute is so that whole plasma discharge process is very well.
(6) rotation pulp tube of the present invention and other designs of part are simple, and integral body assembles up also simple, do not have special highly difficult processing technology.
Description of drawings
Fig. 1 is the top unloader of pressure type upwash bleaching tower structural representation;
Fig. 2 is the structure chart of rotation pulp tube among Fig. 1;
Fig. 3 is the vertical view of slurry-storing box among Fig. 1;
Fig. 4 is a positive front view of scraping lodicule among Fig. 1;
Fig. 5 a is a bluff bit front view of scraping lodicule among Fig. 1;
Fig. 5 b scrapes the positive of lodicule and the cutaway view of bluff bit among Fig. 1.
The specific embodiment
The invention will be further described below in conjunction with accompanying drawing, but the scope of protection of the presently claimed invention is not limited to the scope described in the embodiment.
Be provided with pressure type cat head discharger of the present invention at up-flow bleaching cat head, its structure as shown in Figure 1, top unloader of pressure type upwash bleaching tower comprises variable-frequency motor 1, shaft coupling 2, goes up angular contact ball bearing 3, rotating shaft 4, angular contact ball bearing 5, rotation pulp tube 6, slurry-storing box body 7, cushion block 8, mechanical seal 9, support 10 and scrape lodicule 11 down; Variable-frequency motor 1 is connected by shaft coupling 2 with rotating shaft 4, and rotating shaft 4 adopts Morse's taper to be connected with rotation pulp tube 6.In the lower end of shaft coupling 2, be provided with the last angular contact ball bearing 3 and the following angular contact ball bearing 5 of fixing and supporting rotating shaft 4 on the rotating shaft 4 from top to bottom successively.Last angular contact ball bearing 3 and following angular contact ball bearing 5 are fixed on the support 10.Mechanical seal 9 is arranged on the outside of rotation pulp tube 6, the both sides up and down of slurry-storing box body 7; Slurry-storing box body 7 is arranged on rotation pulp tube 6 peripheries, links into an integrated entity by cushion block 8 usefulness screws and support 10; Rise in order to form the paper pulp spiral, at the inside spot welding hurricane band 31 of rotation pulp tube 6, clamp connection is adopted with scraping lodicule 11 in the lower end of rotation pulp tube 6, connects reliable, for convenience detach.In order to improve strength and stiffness, rotating shaft adopts No. 45 steel.
As shown in Figure 2, the upper and lower end of rotation pulp tube 6 all seals, and its top is connected with rotating shaft 4 employing Morse's taper 6# and (is equivalent to 2 ° 59 ' 12 of cone angle ").The hurricane band of portion's spot welding within it 31, hurricane band 31 can adopt the 25X4 band steel to bend according to the shape of spiral, and the starting point of hurricane band 31 is in the lower edge of stock inlet 33, and terminal point is in the upper edge of its grout outlet 32, and its pitch is 140-180mm.Stock inlet 33 is in rotation pulp tube 6 left and right sides, and rectangular grout outlet 32 directly sprays in the slurry-storing box 7 of sealing in its tangential direction, and the tangential direction of grout outlet 32 is consistent with the rotation direction of hurricane band 31.
As Fig. 3 and shown in Figure 1, the top and the bottom of slurry-storing box 7 are all with the mechanical seal 9 of still with packaging type, the mechanical seal 9 usefulness flanges of its middle and lower part and cat head and rotation pulp tube 6 be fixed on the support and end socket on, the mechanical seal 9 on top adopts flanges to be fixed on the 6 root bead pipes of support 10.On slurry-storing box 7, welded 6 cushion blocks 8, slurry-storing box 7 is fixed on the support 10.The global shape of slurry-storing box 7 is similar to the inside of support 10, and pulp flange-interface 41 wherein is convenient to smooth discharging in the bottom of slurry-storing box 7, and discharge more neatly.
Shown in Fig. 4 and Fig. 5 a, 5b, adopt the lodicule 11 of scraping of clamp connection to form with the lower end of rotation pulp tube 6 by two positives 22 and 6 bluff bits 21, all be cutter shape (seeing Fig. 5 b), wherein the thickness of point of a knife is 0.5mm.Two positives all are welded on the clip, and bluff bit and positive vertical welding mutually.This structure can be removed the paper pulp of accumulation to greatest extent.
Because the viscoplasticity of paper pulp, paper pulp can be accumulated in rotation pulp tube 6 and scrape on the lodicule 11, drag torque is bigger, and running part not only bears the gravity of axial component, and bears the drag torque of radial component.Thereby the upper bearing (metal) 3 of rotating part and lower bearing 5 all select angular contact ball bearing for use, both can bearing radial force, also can bear axial force, and guarantee the normal operation of power transmission shaft.
The sealing of power transmission shaft: because the tower internal pressure is generally more than 0.4Mpa, so adopt mechanical seal 9, for convenience, adopt integrated mechanical sealing (can adopt 205G still integrated mechanical sealing), merit attention integrated mechanical sealing and all adopt flange to connect, adopt screw to be fixed on the end socket or support 10 on.
During work, variable-frequency motor 1 starts, and 4 rotations of rotating shaft that link together with shaft coupling 2 are for the assembling of bottom end bearing 5, (Morse's taper is the international standard of a tapering, is used for stationary fit with accurate location to have adopted the Morse's taper connection between rotating shaft 4 and rotation pulp case 6.Because tapering is very little, utilize the principle of frictional force, can transmit certain torque, again because be taper fit, so can dismantle easily.In the certain limit of same tapering, connector is free to dismounting, can not have influence on result of use again simultaneously when work; In Fig. 2, expressed this annexation.) so rotation pulp tube 6 and rotating shaft 4 be with the rotating speed rotation, adopts clamp connections and scrape lodicule 11 with rotation pulp tube 6, also rotate thereby scrape lodicule 11 together with rotating speed.When 6 rotations of rotation pulp tube, under the effect of tower internal pressure, (be generally 0.4Mpa), paper pulp enters from two stock inlets 33 of rotation pulp tube 6 sides, has avoided short circuit, makes the paper pulp delivery ratio in the tower more even simultaneously.Paper pulp is done the spiral ascending motion under the water conservancy diversion of rotation pulp tube 6 internal helicoid bands 31, discharge from the outlet of tangential direction then, and this spiral ascending motion makes the flow resistance of paper pulp reduce easier discharge.Paper pulp directly enters the slurry-storing box 7 of sealing after grout outlet 32 ejections of rotation pulp tube 6, and grout outlet 32 is also along with rotating shaft 4 rotates synchronously, avoided paper pulp to concentrate on certain position pulp, also reduced rebound effect and the effect of splashing, can not form rough phenomenon in the bottom of casing.Adopt the slurry-storing box 7 of integrated mechanical sealing to utilize cushion block 8 to be screwed on support 10 up and down, its shape is similar to internal stent, effectively utilized the space, and allow pulp flange-interface 41 in its underpart, make plasma discharge very smooth and easy, and sufficient pulp flow is provided for the middle underflow pump of back.
Adopt the form of clip to connect in the bottom of rotation pulp tube 6 and scrape lodicule 11, the positive 22 of scraping lodicule 11 is vertical mutually with bluff bit 21.Scrape lodicule 11 and rotation pulp tube 6 with the rotating speed rotation, wipe the paper pulp on tower upper cover internal face when making pulp off.Simultaneously because the synergy of positive 22 and bluff bit 21 makes slurry scrape relatively thoroughly.When causing long-pending slurry owing to reasons such as misoperations, this moment, bluff bit 21 will be brought into play the function of its blade, directly drew on the tower wall and scraped, and cooperated the slurry effect of scraping of positive 22, can remove the paper pulp of accumulation.
In addition, for different paper pulp, in order to allow paper pulp discharge in tower smoothly, must adjust rotating speed, the present invention adopts variable-frequency motor to make things convenient for speed governing.So the discharging of the top unloader of pressure type upwash bleaching tower of invention is more even, the image that can produce short circuit and open circuit is not fine to the cleaning effect of the long-pending slurry of inner wall of tower, makes the bleaching action better effects if of upflow tower.Rotation pulp tube and slurry-storing box and other designs of part are simple, do not have special highly difficult processing technology.
Embodiment
A diameter is
The up-flow bleaching tower (output is by 190t/d) of 2500mm, tower top pressure 0.4Mpa, reaction temperature is 95-105 ℃, reaction time is one hour, entering the paper pulp weight percent concentration is 10-12%, adopts mechanical scraper-type discharger discharging paper pulp in the past, and wherein the caliber of grout outlet is
350mm has the appearance of yellow slurry frequently behind the bleaching action, must clear up paper pulp about a week, otherwise can influence the emission flow of pulp.Afterwards this nested structure was dismantled, install the discharger of pressure type up-flow bleaching tower of the present invention, adjust its running parameter as follows: the paper pulp weight percent concentration is similarly 10-12%, and the variable-frequency motor power of up-flow bleaching tower base stock slurry distributor is 5KW, and two stock inlet diameters are
159mm, the grout outlet of tangential direction are a mouthful 160X250mm, and the diameter of rotation pulp tube is
325mm, the internal helicoid band forms with the coiling of 4X25 band steel, its pitch is 160mm, the rotating speed of rotation pulp tube is 1-3 commentaries on classics each second, after testing, do not have yellow paper pulp to roll into a ball in the paper pulp and occur, whiteness has increased by 20%, and the phenomenon of long-pending slurry obtained tangible improvement, only needs the long-pending slurry of cleaning in about 1 month now.
Claims (5)
1. top unloader of pressure type upwash bleaching tower is characterized in that: comprise variable-frequency motor, shaft coupling, last angular contact ball bearing, rotating shaft, following angular contact ball bearing, rotation pulp tube, slurry-storing box body, cushion block, mechanical seal, support and scrape lodicule; Described variable-frequency motor is connected by shaft coupling with rotating shaft, and rotating shaft adopts Morse's taper to be connected with rotation pulp tube; In the lower end of shaft coupling, be provided with the last angular contact ball bearing and the following angular contact ball bearing of fixing and supporting rotating shaft on the rotating shaft from top to bottom successively, last angular contact ball bearing and following angular contact ball bearing are fixed on the support; Mechanical seal is arranged on the outside of rotation pulp tube, is positioned at the both sides up and down of slurry-storing box body; The slurry-storing box body is arranged on rotation pulp tube periphery, is connected with support by cushion block; The upper and lower end of rotation pulp tube all seals, and is provided with hurricane band in the inside of rotation pulp tube, and the starting point of hurricane band is in the lower edge of the stock inlet of rotation pulp tube, and terminal point is in the upper edge of its grout outlet, and its pitch is 140-180mm; Stock inlet is arranged on the rotation pulp tube left and right sides, and rectangular grout outlet is arranged on the hurricane band tangential direction, is communicated with slurry-storing box, the lower end that rotates the pulp tube with scrape lodicule and be connected;
The described lodicule of scraping is made up of 2 positives and 6 bluff bits, all is the cutter shape, and wherein the thickness of point of a knife is 0.5mm; Two positives all are welded on the clip, and bluff bit and positive vertical welding mutually.
2. top unloader of pressure type upwash bleaching tower according to claim 1 is characterized in that: the lower end of described rotation pulp tube with scrape lodicule and adopt clamp connection.
3. top unloader of pressure type upwash bleaching tower according to claim 1 is characterized in that: mechanical seal is integrated mechanical sealing.
4. according to each described top unloader of pressure type upwash bleaching tower of claim 1-3, it is characterized in that: welded 6 cushion blocks on the described slurry-storing box body, slurry-storing box is fixed on the support; The global shape of slurry-storing box is similar to the inside of support.
5. according to each described top unloader of pressure type upwash bleaching tower of claim 1-3, it is characterized in that: described rotating shaft is made by No. 45 steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101705386A CN101649572B (en) | 2009-08-31 | 2009-08-31 | Top unloader of pressure type upwash bleaching tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101705386A CN101649572B (en) | 2009-08-31 | 2009-08-31 | Top unloader of pressure type upwash bleaching tower |
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| Publication Number | Publication Date |
|---|---|
| CN101649572A CN101649572A (en) | 2010-02-17 |
| CN101649572B true CN101649572B (en) | 2011-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009101705386A Expired - Fee Related CN101649572B (en) | 2009-08-31 | 2009-08-31 | Top unloader of pressure type upwash bleaching tower |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105256635B (en) * | 2015-10-31 | 2017-06-16 | 重庆市南川区金鑫纸业有限公司 | For the bleaching equipment of paper pulp |
| CN109505181A (en) * | 2018-12-03 | 2019-03-22 | 轻工业杭州机电设计研究院有限公司 | Tower top discharger for middle concentration paper pulp ozone bleaching reactor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2038651A1 (en) * | 1991-03-19 | 1992-09-20 | Kwei-Nam Law | Method and apparatus for bleaching pulps |
| CN201109884Y (en) * | 2007-08-18 | 2008-09-03 | 李风宁 | Unloading device for high density bleaching tower |
| CN101314926A (en) * | 2008-06-12 | 2008-12-03 | 李�昊 | Drawing mechanism of medium-high density bleaching column |
-
2009
- 2009-08-31 CN CN2009101705386A patent/CN101649572B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2038651A1 (en) * | 1991-03-19 | 1992-09-20 | Kwei-Nam Law | Method and apparatus for bleaching pulps |
| CN201109884Y (en) * | 2007-08-18 | 2008-09-03 | 李风宁 | Unloading device for high density bleaching tower |
| CN101314926A (en) * | 2008-06-12 | 2008-12-03 | 李�昊 | Drawing mechanism of medium-high density bleaching column |
Non-Patent Citations (1)
| Title |
|---|
| 文超辉.高浓过氧化氢漂白技术初探.《湖南造纸》.1998,(第1期),10-13. * |
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Granted publication date: 20110316 Termination date: 20130831 |