CN1028252C - Papermaking apparatus - Google Patents
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- CN1028252C CN1028252C CN 92100830 CN92100830A CN1028252C CN 1028252 C CN1028252 C CN 1028252C CN 92100830 CN92100830 CN 92100830 CN 92100830 A CN92100830 A CN 92100830A CN 1028252 C CN1028252 C CN 1028252C
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Abstract
The invention discloses paper-making equipment from paper pulp to paper web, including a double-net molding part from paper pulp to paper web. A press part for pressing the mold paper web is positioned in the downstream of the molding part and facilitates the molding part to be stretched to press part, under the situation of no open-type pulling for the mold paper web. The press pare includes an inverse lengthening press. A monolayer drying part is positioned in the downstream of the press part to dry the pressed paper web.
Description
The present invention relates generally to make the paper making equipment of paper web from paper pulp.The present invention is specifically related to include the paper making equipment that upside-down mounting that a back flow roll and one adds the long nip press device adds long nip press at its press section, and described pressing device is disposed on the described back flow roll.
The invention still further relates to and utilize paper making equipment of the present invention to make the method for paper web and the paper web that utilizes equipment of the present invention to make.
In paper technology, once did the quantity that many effort attempt to reduce the required servicing unit of production dry-web.
The present invention proposes a kind of paper making equipment of uniqueness, only need a press felt in this paper making equipment.
In addition, the invention provides the press section that includes only a suction roll.In typical case, about 500,000 dollars of the cost of each suction roll.Therefore, reduce the totle drilling cost that required suction roll number in the paper machine just can reduce paper machine.
In addition, the invention provides a kind of equipment, in this equipment, when the shaping paper web added the long nip press motion by a upside-down mounting, the paper web that is supported by press felt directly contacted with the smooth circumferential surface of back flow roll.Then, the reverse side of paper web directly contacts with the area of heating surface of a felt wrapped roll, thereby stops the press polish paper web dual character to occur.
Dual character appears in the press polish paper web of making by prevention, and the said equipment has improved the uniformity that paper web two sides thereafter all may be printed.
The present invention is by being provided with a totle drilling cost that also reduces paper machine at the single pulper that leads paper web earlier to receive broken from forming section before passing through press section below press section.In addition, this pulper added long nip press reception broken from upside-down mounting earlier before the paper web that leads squeezing to get well is by drying section.
Therefore, a main purpose of the present invention provides a kind of paper making equipment of being made paper web by paper pulp.Paper making equipment of the present invention compared with prior art has its great contribution technically.
Another aspect of the present invention provides a kind of like this paper making equipment, its flow box comprises one can change the paper pulp that flows through the weir plate chamber transverse to the concentration on the machine run direction, thereby can control the paper web made transverse to the croos profile distribution character on the machine run direction.
Another aspect of the present invention provides a kind of paper making equipment with a forming shoe, and this forming shoe is positioned at the downstream part of first end in the district that is shaped.This shaping district then is limited between the crew-served first and second annular forming nets.This this second net that is configured to makes this second net and the co-operating of forming board curved surface, to increase the stability of this second net under the situation between the forming board curved surface and first net.
Another aspect of the present invention provides a kind of paper making equipment with couch roll, and wherein with under the situation of first net between this couch roll and second is netted, this couch roll then is arranged on the second end place that adjoins the district that is shaped.
Another aspect of the present invention provides a kind of paper making equipment with steam chest device.Steam chest is arranged on and adjoins the first net place.This steam chest is arranged between the second end and press section in the district that is shaped, to improve the temperature of paper web.The feasible temperature from the shaping paper web that is right after this steam chest device downstream part of this configuration reaches 60 °～98.89 ℃ scopes.
Another aspect of the present invention provides a kind of its district that is shaped and comprises one and first paper making equipment of netting crew-served fluted roller.This fluted roller is positioned at the downstream part of the district's the second end that is shaped, and makes and wins net between this fluted roller and pressure roller.This fluted roller comprises driven voller lid, this driven voller lid limit on a plurality of circumference, along the groove on the machine run direction with the first water of channel from removing by the shaping paper web of first net.
Another aspect of the present invention provides a kind of paper making equipment, and wherein driven voller covers when stoping the rill closure or heaving, and allows to produce along the deflection on the machine run direction.
Another aspect of the present invention provides a kind of paper making equipment, wherein press section comprises: a paper carrying roll, this paper carrying roll and the first net co-operating, make the shaping paper web between the paper carrying roll and first net, so that from the first net neck shaping paper web and guide this paper web and enter upside-down mounting and add long nip press.The fluted roller co-operating of paper carrying roll and forming section is so that limit an initial dehydration nip betwixt.
Another aspect of the present invention provides a kind of paper making equipment, wherein be shaped paper web during by initial dehydration nip from first's water that the shaping paper web is removed, cause paper web to reach the 20-35% drying in the aridity of the downstream part that is right after initial dehydration nip.
Another aspect of the present invention provides a kind of paper making equipment, and wherein press section comprises that one adds long nip press with respect to upside-down mounting and is placed in the steam slot device that is right after its upstream end so that further heat this paper web.
Another aspect of the present invention provides a kind of paper making equipment, and wherein press section comprises that a press felt is in order to supporting and transmission paper web.This press section comprises that also a upside-down mounting with back flow roll adds long nip press, and this back flow roll limits a smooth circumferential surface.This configuration makes paper web between the smooth circumferential surface and press felt of this back flow roll, and a side of paper web is contacted with the smooth circumferential surface generation direct surface of back flow roll.
Another aspect of the present invention provides a kind of paper making equipment, and wherein press section comprises a scraper.This scraper and back flow roll surface co-operating.Scraper optionally sweeps the paper web of squeezing from back flow roll.
Another aspect of the present invention provides a kind of papermaking apparatus, and wherein the paper web that adds long nip press from upside-down mounting has the aridity within 36 to 75% scopes.
Another aspect of the present invention provides a kind of paper making equipment, and wherein press section comprises a pulper, this pulper be positioned at press section below, in order to the broken that is leading paper web to receive before by press section to come from forming section.This pulper is also leading paper web to receive broken from back flow roll before passing through drying section.
Another aspect of the present invention provides a kind of paper making equipment, and wherein drying section comprises a single dryer section.This dryer section has a vacuum dancing roll.This dancing roll and back flow roll co-operating have been squeezed paper web in order to guiding and have been entered this single dryer section.This configuration makes that when dancing roll is connected to the partial vacuum source squeezing paper web is drawn to this vacuum dancing roll, transfers on the woolen dry felt of dancing roll extension will squeeze paper web.
Another aspect of the present invention provides a kind of paper making equipment, and wherein dancing roll has a perforation housing.This configuration makes when dancing roll is coupled to the partial vacuum source, has squeezed the full width width of paper web and just transferred on the woolen dry felt from back flow roll.
Another aspect of the present invention provides a kind of paper making equipment, and wherein the drying section device includes the air bells cap device, a drying cylinder co-operating in this air bells cap device and the dryer section at least.This air bells cap device blows to air and by woolen dry felt, reducing the temperature of having squeezed by a narrow margin, thereby increases the heat of transferring to paper web from drying cylinder.
Another aspect of the present invention provides a kind of paper making equipment, and this paper making equipment comprises the hot-air bringing device.This hot-air bringing device and be configured in one of them vacuum dancing roll co-operating between the two adjacent drying cylinders of dryer section at least.The hot-air bringing device blows on the paper web thermal air current to help the accelerated evaporation dry run from this hot-air bringing device.A part of hot-air suction can be arrived adjacent vacuum dancing roll by page and woollen blanket.
Another aspect of the present invention provides a kind of paper making equipment, this paper making equipment has a dryer section, this dryer section has lateral adjustment device, this lateral adjustment device in order to control optionally by the vacuum dancing roll transverse to the air-flow on the machine run direction, so that regulate dry-web transverse to the degree of drying on the machine run direction.
Another aspect of the present invention provides a kind of paper making equipment, and wherein a calender is configured in the drying section downstream part.This calender comprises that a felt wrapped roll and abuts against near the induction heater of felt wrapped roll.This induction heater hot roll makes directly to contact with second face of dry-web through the felt wrapped roll of heating.Thereby second face of this paper web just with upside-down mounting add long nip press contacted of back flow roll stop to the side that dual character appears in the press polish paper web.
Another object of the present invention is to provide the method for utilizing device fabrication paper web of the present invention.
Another purpose again of the present invention is to provide the paper web that utilizes equipment of the present invention to make.
For the ordinary skill in the art, in conjunction with the drawings with the consideration that specifies to hereinafter being done, other purpose of the present invention and advantage will become and be easy to understand.
The present invention relates to paper making equipment, make the method for paper web and the paper web that utilizes equipment of the present invention to make from paper pulp.This equipment comprises in order to form a pair of net forming section of paper web from paper pulp.One press section is disposed at this forming section downstream part, and this press section is not having under the situation of open draw the shaping paper web in order to squeezing shaping paper web, stretches from this forming section to arrive this press section.This press section comprises that a upside-down mounting adds long nip press.One single-tier dryer section is disposed at the downstream of this press section, has squeezed paper web in order to drying.
Of the present invention one than specific embodiment in, this forming section comprises one first and second annular forming net.These nets each other co-operating to limit a shaping district betwixt with first end and the second end.Flow box is configured in and is right after the first end place that adjoins the district that is shaped.This flow box limits a weir plate chamber, and there is an inlet and a slice opening this weir plate chamber.At the upstream end of weir plate chamber configuration one device, this device flows through the weir plate chamber in order to change paper pulp is transverse to the concentration on the machine run direction.The quantitative distribution transverse to the machine run direction of the feasible shaping paper web of making of this configuration is controlled.
More particularly, the device in order to the change pulp density also comprises a plurality of transverse to disposing and be right after the pipe fitting that adjoins this porch on the machine run direction.In addition, also provide with the used coupling arrangement that supplies water to each pipe fitting, thus but the concentration of diluted pulp.One control device and this coupling arrangement co-operating, the feasible concentration that flows through the paper pulp of every pipe fitting is controlled, and is regulated thereby can make by the concentration of paper pulp on the cross machine traffic direction of slice opening ejection.
More detailed saying, each the root pipe fitting in these a plurality of pipe fittings all comprises a upstream element.This upstream element has a upstream conduit, and this upstream conduit has circular cross section on transverse to the machine run direction.One downstream element limits a downstream conduit, and this downstream conduit has the cross section of rectangle on transverse to the machine run direction.Every pipe also comprises a intermediary element between the element of upstream and downstream, and this intermediary element limits an intermediate conductor, and this intermediate conductor has circular cross section on transverse to the machine run direction.
Forming section also comprises a forming shoe, and this forming shoe is disposed at the downstream part of the district's first end that is shaped.This forming shoe limits a curved surface, make second net and this curved surface co-operating and be disposed at this curved surface and first the net between.This forming shoe is disposed between the center and press section of this curvature of curved surface, so that improve the stability of second net.
And this forming section comprises a couch roll, and this couch roll is disposed at the second end place that adjoins the district that is shaped.First net is disposed between this couch roll and second net.
In addition, this forming section comprise be disposed at adjoin first the net the steam chest device.This steam chest device is disposed between the second end and press section in the district that is shaped, so that the shaping paper web is carried out decatize.
In more detail, the steam chest device is to shaping paper web heating, makes the temperature of the shaping paper web that enters press section between 60 ° to 98.89 ℃ scopes.
Forming section also comprises one and the crew-served fluted roller of first net.This fluted roller is disposed at the downstream part of the second end in the district that is shaped, and the gauze of winning is disposed between this fluted roller and the press section.
In more detail, this fluted roller also comprises driven voller lid, and this roller lid limits the groove along the machine run direction on a plurality of circumference, first's water of removing by first net from paper web in order to channel.
More particularly, this driven voller lid has an elastic modelling quantity along the machine run direction, this along machine run direction elastic modelling quantity greater than this roller lid transverse to machine run direction elastic modelling quantity.This configuration makes when stoping groove to be heaved, allows this roller to cover vertical deflection.
This press section comprises a paper carrying roll, and this paper carrying roll and the first net co-operating make the shaping paper web between the paper carrying roll and first net.This configuration makes paper carrying roll the shaping paper web can be transferred to press section and paper web is directed into upside-down mounting from first net to add long nip press.
In addition, the press section that includes paper carrying roll is arranged to and makes paper carrying roll and fluted roller co-operating, makes at it and limits an initial dehydration nip between the two.This configuration makes paper web cross in the motion process of initial dehydration nip between the paper carrying roll and first net in shaping paper web and first Netcom.
More particularly, paper carrying roll and the co-operating of driven voller lid, the time of staying when passing through initially to dewater nip in order to increase the shaping paper web.
More particularly, to be the shaping paper web remove from the shaping paper web by initial dehydration nip the time first's water, makes to enter shaping paper web that upside-down mounting adds long nip press and have aridity within 20～35% scopes.
In a specific embodiment of the present invention, this paper carrying roll is a suction roll that optionally is connected to the partial vacuum source.
This press section comprises that also one adds steam slot device between the long nip press in forming section and upside-down mounting.This steam slot device further heats paper web, to help the dehydration in upside-down mounting adds long nip press.
More particularly, the steam slot device comprises one and the crew-served steam groove of paper web.This steam slot device also comprise one with the crew-served vacuum tank of steam groove, make that extend in forming section and upside-down mounting adds paper web between the long nip press between steam groove and vacuum tank.
Press section also comprises a press felt, in order to the supporting paper web, paper web is added long nip press from the forming section conveying by upside-down mounting.
This upside-down mounting adds long nip press and also comprises a back flow roll, and this back flow roll limits a smooth circumferential surface, makes paper web between this smooth circumferential surface and press felt of back flow roll.This configuration makes the one side of paper web contact with the smooth circumferential surface generation direct surface of back flow roll.
This press section also comprises a crew-served scraper of smooth circumferential surface with back flow roll.This scraper optionally sweeps from the back flow roll surface and squeezes paper web.
In addition, upside-down mounting adds long nip press and comprises one and the crew-served lengthening pressing device of back flow roll, to limit a lengthening press. nips betwixt.This configuration makes that the time of staying that just prolongs paper web is to remove second portion water from paper web when paper web extends press. nips by this.
In one embodiment of the invention, this lengthening press. nips device is a hydrokinetic forming shoe.
In another embodiment of the present invention, this lengthening press. nips device is a hydrostatic forming shoe.
No matter in hydrokinetic or hydrostatic embodiment of the present invention, add long nip press and comprise a ring-shaped bearing felt that extends through this lengthening press. nips.This felt is disposed between lengthening pressing device and the press felt.
In one embodiment of the invention, this lengthening pressing device is closed in the supporting felt of annular.
The paper web of emerging from this lengthening press. nips has the aridity in 36～75% scopes.
In addition, this press section comprises a pulper that is disposed at below this press section, and this pulper is in order to lead the shaping paper web by receiving the shaping paper web from forming section before the press section when starting working.This pulper also squeezes the paper web of squeezing that paper web receives to add since upside-down mounting long nip press before by single-tier dryer section leading.
This single-tier dryer section also comprises a vacuum guide-in roller, and this dancing roll and upside-down mounting add the long nip press co-operating.This vacuum dancing roll is connected to a part of vacuum source, has squeezed paper web also will squeeze paper web directs into this single-tier dryer section to add long nip press neck from upside-down mounting.
And this drying section comprises a woolen dry felt, and this woollen blanket extended loop is around the vacuum dancing roll.This configuration makes that the shaping paper web is disposed at woolen dry felt and upside-down mounting adds between the long nip press.When this vacuum dancing roll is connected to the partial vacuum source, is disposed at the paper web of squeezing that woolen dry felt and upside-down mounting add between the long nip press and just is drawn to the vacuum dancing roll, and it is transferred on the woolen dry felt.
More particularly, this vacuum dancing roll also comprises a perforation housing, make when this dancing roll is connected to the partial vacuum source, just vacuum is added to along on the full width width of paper web, add long nip press with paper web from upside-down mounting and transfer to woolen dry felt the full width width by woolen dry felt.
In one embodiment of the invention, this single drying section also comprises this vacuum dancing roll, and this dancing roll is configured in and is right after the scraper place that adjoins this back flow roll.This configuration makes that this afterbody just is pulled to this vacuum dancing roll, makes its afterbody be added long nip press belt by the vacuum dancing roll from upside-down mounting and walks after the afterbody of the paper web that will squeeze sweeps from the back flow roll surface.This configuration makes that having squeezed paper web is led automatically by this single-tier dryer section.
More particularly, this single drying section comprises one first single dryer section.The first individual layer dryer section comprises a plurality of drying cylinders.This dryer section also comprises a plurality of vacuum delivery paper bowls, and this transfer roller is right after between the two adjacent drying cylinders of the two adjacent drying cylinders that are adjacent to first dryer section and position first dryer section.
One woolen dry felt alternately extends the adjacent vacuum delivery paper bowl around each drying cylinder and first drying section, makes to have squeezed paper web between woolen dry felt and each drying cylinder, so that at least a side of paper web is heated.
More particularly, first dryer section comprises and the crew-served air bells cap device of at least one drying cylinder wherein.This air bells cap device can blow to air and by woolen dry felt, to reduce the temperature of having squeezed paper web, makes the heat that is transferred to paper web from drying cylinder obtain increasing.This woolen dry felt is disposed at this air bells cap device and extended loop between the paper web of squeezing of drying cylinder.
In addition, this individual layer first dryer section comprises a hot-air bringing device.This hot-air bringing device and wherein at least one vacuum transfer roller co-operating.This hot-air bringing device is connected to a pressurized heat air source, to improve the rate of drying of paper web.
More particularly, when this hot-air generator device is connected to the pressurized heat air source, just air-flow is blowed to extended loop on the paper web of squeezing of vacuum delivery paper bowl.This configuration makes paper web between hot gas bringing device and woolen dry felt.
More particularly, air-flow flows with the speed of 3048～6096 meters of per minutes with in 204.44 °～371.11 ℃ scope.This air-flow blows out from the hot-air bringing device, and a part of air-flow can flow by squeezing paper web, enters the vacuum delivery paper bowl by woolen dry felt then.
In another one embodiment of the present invention, the hot-air bringing device comprises and is connected to the former vacuum plant of partial vacuum, makes directive squeeze the paper web air communication and crosses vacuum plant and take away from this paper web.
In a specific embodiment of the present invention, this hot-air bringing device also comprises in order to optionally controlling the lateral adjustment device that flows relatively transverse to the air-flow of machine run direction, so that regulate dry-web transverse to the aridity on the machine run direction.
The diameter of each drying cylinder in a plurality of drying cylinders is between 1.83 to 2.44 meters.
In addition, the second individual layer dryer section is disposed at and is right after the downstream part that adjoins the first single dryer section.
First dryer section is lined with woollen blanket in its top, and second dryer section then is lined with woollen blanket in its bottom.Paper web is not have under the situation of open draw, shift between first and second dryer sections, make a side of paper web be dried in by the first dryer section process at this paper web, the another side of paper web then is dried in by the second dryer section motion process at this paper web.
With above-mentioned similar, be provided with the 3rd individual layer dryer section that its top is lined with woollen blanket at the downstream part that is right after the second individual layer dryer section.As the United States Patent (USP) 4 that is presented to scott root people such as (Skaugen), 934,067 and people's such as scott root sequence number be 07/201, that is instructed in the application common co-pending of 705 the U.S. is such, this configuration makes paper web not have under the situation of open draw, transfer is between the second and the 3rd drying section, thereby the prevention paper web produces the contraction transverse to the machine run direction.The content of the common application co-pending of above-mentioned United States Patent (USP) 4,934,067 and sequence number 07/201,705 is attached among the present invention by reference.
Therefore, the first and the 3rd dryer section all is the same side of dry-web.
In a preferred embodiment of the invention, this paper making equipment also comprises the calender that is positioned at the single-tier dryer section downstream part.
More particularly, this upside-down mounting adds long nip press and comprises a back flow roll, and this back flow roll limits a smooth circumferential surface, and this surface with a side of shaping paper web direct surface takes place and contacts.This calender comprises also that a felt wrapped roll and one are disposed at and is right after the induction heater that adjoins this felt wrapped roll.This induction heater heats felt wrapped roll, makes the another side of the paper web that heated felt wrapped roll is direct with dry directly contact, and dual character appears in the press polish paper web thereby stop.
The present invention also comprises the technical process of making paper web from paper pulp.This technical process comprises the following steps: to make paper pulp to pass through two net forming sections and forms paper web; This shaping paper web of squeezing in the motion process of the press section of shaping paper web by being disposed at the forming section downstream part; Make the shaping paper web not have to extend the arrival press section from forming section under the situation of open draw.The squeezing step comprises that making paper web move through a upside-down mounting adds long nip press.To squeeze paper web guiding then by being positioned at the single-tier dryer section of press section downstream part, with should shaping paper web drying.
The paper web that the present invention makes has surface characteristic relatively uniformly, and has good two sides impressionability.
Many modifications and changes of the present invention, concerning the people of the ordinary skill of this area, in conjunction with the drawings and detailed description of the present invention, will become is easy to understand.Yet, also belong to the spirit and scope of the present invention by the sort of modifications and changes that claim limited of enclosing.
Fig. 1 is the side view of paper making equipment of the present invention;
Fig. 2 is the enlarged side view of two net forming sections of paper making equipment shown in Figure 1;
Fig. 3 is the enlarged side view of the flow box of shown in Figure 2 pair of net forming section.
Fig. 4 is the cross section enlarged side view along the 4-4 line intercepting of Fig. 3.
Fig. 4 A is the side view along the cross section of the 4A-4A line intercepting of Fig. 4.
Fig. 5 is the fluted roller shown in Figure 2 and the perspective view of paper carrying roll.
Fig. 6 is the enlarged side view of the press section of paper making equipment shown in Figure 1.
Fig. 7 is the enlarged side view that the upside-down mounting that includes a fluid power forming shoe shown in Figure 6 in one embodiment of the present of invention adds long nip press.
Fig. 8 is the enlarged side view that the upside-down mounting that includes a fluid static(al) forming shoe shown in Figure 6 in an alternative embodiment of the invention adds long nip press.
Fig. 9 is the enlarged side view that the upside-down mounting that is similar to squeezing shown in Figure 6 adds long nip press, but its pressing device then is closed in the ring-shaped bearing felt.
Figure 10 is the enlarged side view of the single-tier dryer section of paper making equipment shown in Figure 1.
Figure 11 is the enlarged side view that upside-down mounting shown in Figure 6 adds long nip press and part first dryer section.
Figure 12 is along the enlarged drawing in the cross section of the 12-12 line intercepting of Figure 11, and the hot-air bringing device that includes lateral adjustment device is described.
Figure 13 is the enlarged side view of another embodiment of the present invention, and the hot-air bringing device that includes vacuum plant is described.
Figure 14 is the enlarged side view of the calender of paper making equipment shown in Figure 1.
In above-mentioned each view, identical reference number is represented identical parts.
Fig. 1 is in order to making the side view of the paper making equipment of the present invention 10 of paper web W from paper pulp, and this equipment 10 comprises two net forming sections 12, in order to form this paper web W from paper pulp.
This press section 14 comprises that upside-down mounting adds long nip press 16.
Single-tier dryer section 18 is positioned at the downstream part of press section 14 in order to carry out drying to squeezing paper web W.
Forming section
Fig. 2 is the enlarged side view of forming section 12 shown in Figure 1.Forming section 12 shown in Figure 2 comprises the first annular forming net 20 and the second annular forming net 22.Forming net 20 and forming net 22 co-operating together distinguish 24 to limit a shaping betwixt.This shaping district 24 has first end 26 and the second end 28.
Fig. 3 is the enlarged side view of flow box 30 shown in Figure 2.
Figure 3 shows that the upstream end that is positioned at weir plate chamber 32 is in order to change the paper pulp that flows through weir plate chamber 32 represented with arrow S at the device 38 transverse to the concentration on the machine run direction.This configuration makes the shaping paper web of making be controlled transverse to the distribution of the croos profile on the machine run direction.
Fig. 4 is the sectional view along 4-4 line intercepting shown in Figure 3.Fig. 4 illustrates in order to change the device 38 of pulp density.This device 38 comprise a plurality of by shown in the arrow C D direction transverse to the machine run direction on the pipe fitting 40,41,42,43,44,45,46,47 and 48 that disposes.Pipe fitting 40～48 is disposed to be right after and adjoins inlet 34 places.
Fig. 4 A is the sectional view of Fig. 4 along the intercepting of 4A-4A line.More particularly, shown in Fig. 4 A, each the root pipe fitting in the pipe fitting 40 to 48 all comprises a upstream element 70,71,72,73,74,75,76,77 and 78.Each element 70 to 78 limits a upstream conduit that circular cross-section is arranged on transverse to the machine run direction.
Each root pipe fitting of pipe fitting 40 to 48 also comprises a downstream components 90,91,92,93,94,95,96,97 and 98.Each element of downstream components 90 to 98 limits a downstream conduit that the square-section is arranged on transverse to the machine run direction.
And every pipe fitting of pipe fitting 40 to 48 comprises an intermediary element 110,111,112,113,114,115,116,117 and 118 that is each positioned between upstream 70～78 and the downstream components 90～98.These intermediary element 110～118 each element limit an intermediate conductor that circular cross-section is arranged on transverse to the machine run direction.
Now later referring to Fig. 2, this forming section 12 also comprises the forming shoe 130 of the downstream part of a first end 26 that is positioned at the district 24 that is shaped.This forming shoe 130 has a curved surface 132, makes second net 22 and curved surface 132 co-operatings and make this second net 22 between this curved surface 132 and first net 20.Forming board 130 between the center of curvature CC of curved surface 132 and press section 14 to improve the stability of second net 22.
As shown in Figure 2, forming section 12 also comprises a couch roll 134, and this couch roll 134 is disposed at the second end 28 places in the contiguous district 24 that is shaped.First net 20 is between the couch roll 134 and second net 22.This couch roll 134 comprises a suction zones 135 in order to the shaping paper web is dewatered.
Forming section 12 shown in Figure 2 also comprises a steam chest device 136.This steam chest device 136 is disposed at and adjoins first net, 20 places and between the second end 28 and press section 14 in district 24 that be shaped, in order to the shaping paper web is carried out decatize.
More particularly, the water in these steam chest device 136 heating shaping paper webs makes the shaping paper web that enters press section 14 reach 60 °～98.89 ℃ temperature range, and aridity is between 5～20%.
In a preferred embodiment of the invention, the shaping paper web that enters press section has 10～14% aridity.
As shown in Figure 2, forming section 12 also comprises one and first net, 20 crew-served fluted rollers 138.This fluted roller 138 is positioned at the downstream part of the second end 28 in the district 24 that is shaped, and makes and wins net 20 between this fluted roller 138 and press section 14.
Fig. 5 is the enlarged perspective of fluted roller 138 shown in Figure 2.Fluted roller 138 shown in Fig. 5 also comprises driven voller lid 140.The grooves 141,142 and 143 that this driven voller lid 140 limits on a plurality of circumference along the machine run direction, first's water of removing by first net 20 from shaping paper web W in order to channel.
In more detail, this driven voller lid 140 transverse to the elastic modelling quantity on the machine run direction CD greater than it along the elastic modelling quantity on the machine run direction MD, heave for restrain tank 141～143 like this, just allow this roller lid 140 along producing deflection on the machine run direction MD.
Press section
Fig. 6 is the enlarged side view of press section 14 shown in Figure 1.This press section 14 comprises a paper carrying roll 144.This paper carrying roll 144 and 20 co-operatings of first net make shaping paper web W between the paper carrying roll 144 and first net 20, add long nip press 16 so that shaping paper web W is led and it is directed into upside-down mounting from first net 20.
In more detail, paper carrying roll 144 and fluted roller 138 co-operatings are to limit an initial dehydration nip N1 betwixt.This configuration makes the shaping paper web W and first net 20 by should initially dewatering nip N1 between moving period, and shaping paper web W is disposed between the paper carrying roll 144 and first net 20.
As shown in Figure 6, this paper carrying roll 144 covers 140 co-operatings with driven voller shown in Figure 5, makes shaping paper web W moves through increases this shaping paper web in the process of initial dehydration nip N1 the time of staying.
In more detail, first's water is to remove from shaping paper web W in shaping paper web W moves through the process of initial dehydration nip N1.Make and to enter the aridity that shaping paper web W that upside-down mounting adds long nip press 16 just has 20% to 35% scope.
More particularly, paper carrying roll 144 is suction rolls 146.This suction roll 146 optionally is connected to partial vacuum source 148.
As shown in Figure 6, press section 14 also comprises a steam slot device 150, and this steam slot device 150 is disposed at forming section 12 and the upside-down mounting lengthening is pressed between the squeezer 16, is used for steam is applied to paper web W.
Say that more specifically steam slot device 150 comprises one and the crew-served steam groove 152 of paper web W.Vacuum tank 154 and 152 co-operatings of steam groove make to extend in press section 12 and upside-down mounting and add paper web W between the long nip press 16 between steam groove 152 and vacuum tank 154.
In addition, as shown in Figure 6, this press section 14 comprise one with smooth circumferential surface 160 crew-served scrapers 162.This scraper 162 is optionally worked to sweep with the surface 160 from back flow roll 158 and is squeezed paper web W.
As shown in Figure 6, the upside-down mounting lengthening presses nip press for extracting juice 16 also to comprise a lengthening pressing device 164, and surface 160 co-operatings of this pressing device and back flow roll 158 are to limit a lengthening press. nips N2 betwixt.The feasible paper web W by this lengthening press. nips N2 of this configuration has increased the time of staying, so that remove second portion water from paper web.
Fig. 7 is the enlarged side view of one embodiment of the present of invention, and lengthening pressing device 164A wherein is a fluid dynamic force forming shoe 166.
Fig. 8 is the enlarged side view of another embodiment of the present invention, and lengthening pressing device 164B wherein is a hydrostatic forming shoe 166B.
In Fig. 7 and two embodiment of the present invention shown in Figure 8, its upside-down mounting adds long nip press 16 and also comprises a ring-shaped bearing felt 168 by lengthening press. nips N2.This felt 168 is disposed between lengthening pressing device 164 and the press felt 156.
Fig. 9 is the enlarged side view of another embodiment of the present invention.Lengthening pressing device 164C wherein is closed in the ring-shaped bearing felt 168C.
Usually, the paper web of the squeezing W according to the present invention is emerged from lengthening press. nips N2 has the aridity in 36～75% scopes.
As shown in Figure 6, this press section 14 comprises a pulper 170 that is positioned at below the press section 14, and this pulper receives the shaping paper web W from forming section 12 in order to leading shaping paper web W to begin operating period before by press section 14.Pulper 170 also is received in to lead and squeezes paper web W by add the paper web of the squeezing W of long nip press before the single-tier dryer section 18 from upside-down mounting.
Drying section
Figure 10 is the enlarged side view of single-tier dryer section 18 shown in Figure 1.
As shown in figure 10, this single-tier dryer section 18 comprise one with upside-down mounting add long nip press 16 crew-served vacuum dancing rolls 172.This vacuum dancing roll 172 is connected to a partial vacuum source 174, in order to shifting from the paper web of the squeezing W of lengthening nip press 16 and it be directed on the single-tier dryer section 18.
These woolen dry felt 176 extended loops make that around vacuum dancing roll 172 having squeezed paper web W adds between the long nip press 16 at woolen dry felt 176 and upside-down mounting.This configuration makes when vacuum dancing roll 172 is connected to partial vacuum source 174, will draw to vacuum paper carrying roll 172 so that transfer on the woolen dry felt 176 at the paper web of the squeezing W that woolen dry felt 176 and upside-down mounting add between the long nip press 16.
Figure 11 is the enlarged side view of vacuum dancing roll 172.As shown in figure 10, this dancing roll 172 comprises a perforation housing 178, make when dancing roll 172 is connected to partial vacuum source 174, just vacuum is applied to along on the paper web W of the full width width that has squeezed paper web W by woolen dry felt 176, and the paper web W of this full width width is added long nip press 16 from upside-down mounting transfers on the woolen dry felt 176.
On the other hand, as shown in figure 11, this single-tier dryer section 18 comprises being disposed at and is right after the vacuum dancing roll 172 that adjoins scraper 162 places, make after the afterbody T that squeezes paper web W sweeps from the surface 160 of back flow roll 158, just this afterbody T is drawn to this vacuum dancing roll 172, this afterbody T just adds long nip press 16 by this vacuum dancing roll 172 from upside-down mounting and transports.This configuration makes squeezes paper web W and is automatically led by single-tier dryer section 18.
As shown in figure 10, in a specific embodiment of the present invention, this single-tier dryer section 18 also comprises one first individual layer dryer section 180.This first individual layer dryer section 180 comprises a plurality of drying cylinders 181,182,183,184,185 and 186.
This dryer section 180 also comprises a plurality of vacuum delivery paper bowls 188,189,190,191 and 192.These a plurality of vacuum delivery paper bowls 188 to 192 are configured to be right after and adjoin and between the drying cylinder 181 to 186 of the first adjoining dryer section 180.
This woolen dry felt 176 alternately extended loop around the vacuum delivery paper bowl 188 to 192 of each drying cylinder of drying cylinder 181 to 186 and adjoining first dryer section 180, make and squeezed paper web W between woolen dry felt 176 and each drying cylinder 181～186, so that to squeezing a side 161 heating of paper web W.
In addition, as shown in figure 10, then there is the second individual layer dryer section 194 first dryer section, 180 back, carry out drying with second side 196 to paper web W.Second side 196 of paper web W is the opposite face of first side.
First dryer section, 180 tops are lined with woollen blanket, and the second individual layer dryer section 194 then is lined with woollen blanket in the bottom.United States Patent (USP) 4,934,067 as people such as this cocas is disclosed such, and paper web W is not having under the situation of open draw, extends between dryer section 180 and 194.United States Patent (USP) 4,934, all the elements of 067 are attached among the present invention by reference.
The first individual layer dryer section 180 also comprises an air bells cap device 198, this air bells cap device at least with one of them drying cylinder 186 co-operating shown in Figure 10.This air bells cap device such as arrow 200 indications are towards woolen dry felt 176 blowings and make wind pass through woollen blanket 176, so that reduce the temperature of having squeezed paper web W, thereby the heat that increases from drying cylinder 186 to paper web W transmits.This woolen dry felt 176 is disposed at air bells cap device 198 and has squeezed between the paper web W, and this has squeezed the paper web extended loop around this drying cylinder 186.
Shown in Figure 10 and 11, single-tier dryer section 18 also comprises hot-air bringing device 202.This hot-air bringing device 202 at least with one of them vacuum transfer roller 189 co-operating.This hot-air bringing device 202 is connected to pressurized heat wind regime 204, to improve the speed of paper web drying.
Say that more specifically this hot-air bringing device 202 is when the heated air source 204 that is connected to pressurization and when paper web W extended loop during around vacuum delivery paper bowl 189, squeeze paper web W just air-flow is blowed to as arrow 206 indications.This configuration makes has squeezed paper web W between hot-air bringing device 202 and woolen dry felt 176.
As shown in figure 11, in a preferred embodiment of the invention, flow in the temperature range of air-flow 206 with 3048～6096 meters/minute speed and 204.44 °～371.11 ℃.This air-flow 206 blows out by squeezing paper web W from hot-air bringing device 202, enters vacuum delivery paper bowl 189 by woolen dry felt 176 then.
Figure 12 is the amplification sectional view along the 12-12 line intercepting of Figure 11.As shown in figure 12, this hot-air bringing device 202 also comprises croos profile adjusting device 208, in order to optionally being controlled at relative discharge, to be adjusted in transverse to the aridity of dry-web W on the machine run direction CD transverse to machine run direction CD overdraught.The adjusting device of above-mentioned pattern is open in the United States Patent (USP) 4,662,398 of authorizing the Wei Weiyaluo Paderewski.United States Patent (USP) 4,662, all the elements of 398 are attached among the present invention by reference.
Figure 13 is the enlarged side view according to the hot-air bringing device 202D of another one embodiment of the present invention.More specifically say, hot-air bringing device 202D is connected to pressurized heat wind regime 204D, this hot-air bringing device 202D comprises vacuum plant 203, make when air-flow 206D from this hot-air bringing device 202D outflow and when blowing at dry-web WD, air-flow 206D just takes away from paper web WD by vacuum plant 203.
The diameter of each drying cylinder in the drying cylinder 181～186 shown in Figure 10 preferably has 2.13 meters diameter in 1.83～2.44 meters scopes.
Figure 14 is the enlarged side view of calender 210, and it is positioned at the downstream part of single-tier dryer section 18.
Say that more specifically upside-down mounting lengthening squeezing 16 as shown in Figure 6 comprises back flow roll 158.This back flow roll 158 has smooth circumferential surface 160.Direct surface takes place with the side 161 of shaping paper web W and contacts in this surface 160.
This press polish device 210 also comprises a felt wrapped roll 212 and induction heater 214.This heater 214 is disposed to be right after and adjoins felt wrapped roll 212 places, in order to felt wrapped roll 212 is heated.The feasible felt wrapped roll that the is heated 212 directly contacts and dry-web W one side 161 second side surface opposite 196 of this configuration, thus dual character appears in paper web after stoping press polish.
In addition, as shown in figure 10, drying section 18 comprises that also a top is lined with the 3rd individual layer dryer section 216 of woollen blanket.This configuration makes the side 161 of paper web W be dried when paper web moves through the first individual layer dryer section 180 and the 3rd layer of dryer section 216.Paper web W is not having under the open draw situation, transfer to second dryer section 194 from first dryer section 180, and then do not having under the situation of open draw, transfer to the 3rd dryer section 216 from second dryer section 194 again, make when paper web along drying section 18 from press section 14 when calender 210 moves, the two sides of paper web all is dried.
In the work of the equipment shown in Fig. 1-13, paper pulp S is controlled on transverse to the machine run direction transverse to the concentration S on the machine run direction, makes changing transverse to the machine run direction from the paper pulp of flow box 10 by slice opening 36 ejections.
Paper pulp S between net 20 and net 22 moves to its second end 28 from first end 26 along the district 24 that is shaped.Paper pulp moves between net 20 and net 22 and forms the curved surface 132 of plate 130 by cambered surface, makes at paper pulp around curved surface between 132 moving periods, and some moisture content in the paper pulp are forced out and by first net 20.In addition, because the cause of curved surface 132, the water in the paper pulp has is dished out by centrifugal force and tendency by first net 20.
And, since cambered surface forms that plate 130 is in second ring network and since the center of curvature of curved surface 132 with shaping district 24 sides of second net, 22 same side, therefore, by being shaped the district between 24 moving periods, can make second net 22 have stable tendency at second net 22.
Shaping paper web W is directed to the couch roll 134 that can be vent roll around, and making it can be by first net 20 from the more water of paper web venting.In addition, first net 20 and second net 22 surpass 90 degree around couch roll 134, make paper web, go and the centrifugal more water of skimming from the paper web pressure by second net 22 between 134 moving periods around couch roll.
At the downstream part that is right after couch roll 134, first net 20 and second net 22 just are separated from each other immediately.Preferably apply vacuum by couch roll 134, with guarantee when first net 20 and second net 22 when the downstream part that is right after couch roll 134 is separated from each other, paper web W expectedly follows first net 20.
The paper web that is positioned at above the forming net 20 leads by steam chest device 136 towards press section 14 motions and by net 20.136 pairs of shaping paper webs of steam chest device W applies high-temperature steam makes steam pass through this paper web, is arranged in steam chest the vacuum tank of side is then taken out these steam from this paper web.Paper web helps to extrude from paper web subsequently the processing step of moisture content through such steam treatment.
Still by the paper web of first net 20 supporting by initial dehydration nip N1 shown in Figure 5.This initial dehydration nip N1 is limited between paper carrying roll 144 and the fluted roller 138.144 of fluted rollers are as suction roll.
This fluted roller 138 is equipped with driven voller lid 140.This driven voller lid 140 limits a plurality of circumferential grooves 141～143, is used for when paper web extends through initial dehydration nip N1 the water that channel comes out from nip N1.
More particularly, this driven voller lid 140 makes that it is vertically flexible than tool, makes this roller cover at paper web during by initial dehydration nip N1 motion, can deflection.This configuration makes that initial dehydration nip N1 is long or an extend nip.Yet comparatively speaking, driven voller lid 140 is that tool is not flexible on transverse to the machine run direction, makes that the bulge phenomenon that groove 141～143 produces can be inhibited when paper web passed through initially to dewater nip N1 motion.This bulge phenomenon exists when using the driven voller lid always, generally is at this roller lid during by the motion of dehydration nip, and pressure that this roller covers causes owing to being applied to.This pressure tends to cause flattening these grooves or make it " heaving ", thereby has reduced its fortune outlet capacity.Driven voller lid provided by the invention, tool is not flexible on transverse to the machine run direction, thereby has overcome the problem of above-mentioned " heaving ", so water is easy to drain from nip N1.
In addition, paper carrying roll 144 is equipped with a suction gland, makes water be drained and shaping paper web W can be transferred on the press felt 156 from forming net 20 by nip N1.
Be bearing in press felt 156 following paper web W and be transmitted through steam slot device 150, so that before the paper web guiding is added long nip press 16 by upside-down mounting, paper web is carried out further presteaming through preliminary hydro-extraction.
Direct surface takes place with the smooth circumferential surface of back flow roll 158 160 and contacts in the side 161 of paper web W.
In addition, this upside-down mounting adds long nip press 16 or comprises that one is hydrokinetic or comprise hydrostatic squeezing forming shoe.This squeezing forming shoe be positioned at back flow roll 158 the top and with these back flow roll 158 co-operatings so that limit betwixt one the lengthening press section.Therefore, this lengthening pressing device and back flow roll 158 co-operatings make paper web between the smooth surface 160 and press felt 156 of roller 158 to limit lengthening press. nips N2.In addition, under the situation between squeezing forming shoe and the press felt 156, ring-shaped bearing felt 168 is movable by nip N2 at felt 168.
In one embodiment of the invention, annular felt surrounds the squeezing forming shoe, thereby avoids squeezing the pollution of the lubricating oil between the inner surface that paper web is subjected to this squeezing forming shoe and ring-shaped bearing felt 168.
Because back flow roll 158 limits smooth surface 160, make that paper web can expectedly be followed this smooth surface 160, and can not follow press felt 156 when press felt 156 separates with this surface 160.
In leading paper web work, an afterbody cutting knife (not shown) that is positioned at initial dehydration nip N1 downstream part moves to from 10.16～12.70 centimetres of web edge from the front of paper web W, and utilizes water to spray or similar way cuts afterbody T from paper web W.
When carrying out the back-end crop step, the leading edge boot (not shown) by paper carrying roll applies vacuum, with the afterbody traction of paper web W to and direct into upside-down mounting by press felt 156 and add long nip press 16, and the remainder of shaping paper web is to falling into pulper 170.
This afterbody T is guided by adding long nip press N2 and by scraper 162 it being swept in the pulper 170 by press felt 156 then.
When afterbody stably passes through press section, by being applied to woolen dry felt 176, make the afterbody squeezing between woolen dry felt 176 and drying cylinder 181 high vacuum in order to vacuum dancing roll 72 with afterbody T traction.In order to help that afterbody is transferred to woolen dry felt 176 from smooth surface 160, a pressure-air nozzle or similar device (not shown) can be set near scraper.Afterbody is blowed to woolen dry felt 176.
When this afterbody stably when the drying section, this afterbody cutting knife can be laterally moved to the trailing flank of this paper web W, can guide the page of full width width by initial dehydration nip N1 and adds long nip press N2, subsequently again by drying section 18.
On the other hand, when this afterbody T stably when adding long nip press N2, this afterbody cutting knife can be moved to the trailing flank of paper web W, make the page of full width width shift by adding long nip press N2 and scraping in the pulper 170 from net 20.
When the paper web of full width width stably when adding long nip press N2, another afterbody can cut with this afterbody cutting knife, makes the paper web of this another afterbody and remaining full width width move through to add long nip press N2 and is scraped in the pulper 170 subsequently.
Then, another afterbody can blow away and by vacuum being applied to vacuum dancing roll 172 it be guided by drying section 18 from scraper.
Lead paper web to pass through the other method of drying section 18, comprise by nip N2 and determine a full width width paper web and this full width width paper web is scraped pulper 170.Since with high vacuum apply by dancing roll 172 and since dancing roll 172 be right after near the smooth surface 160, therefore the full width width sheets can be transferred to woolen dry felt 176 from smooth surface 160, if particularly near the scraper 162 along paper web disposing on the width transverse to the machine run direction under the situation of air nozzle (not shown), all the more so.
Therefore, no matter adopt what method to lead paper web to pass through press section 14, paper web is all led by drying section 18.
Vacuum is put on each vacuum delivery paper bowl 188～192, paper web is automatically led by the first individual layer dryer section 180.
Also vacuum is applied by the adjoining suction roll between first dryer section 180 and second dryer section 194, make paper web like that people such as coca 4934067 those instructions of United States Patent (USP) like that, do not having to transfer to dryer section 194 from dryer section 180 under the open draw situation.
Hate under the condition when paper web is having open draw, by first, second and the 3rd dryer section 180,194 and 216 o'clock, first side 161 of paper web just was dried between the moving period by the first and the 3rd dryer section 180 and 216 respectively at paper web.
Yet, pass through second dryer section between 194 moving periods at paper web W, the surface takes place with the heated surface of the drying cylinder of second dryer section 194 and contacts in the reverse side 196 of paper web.This configuration makes paper web by drying section 18 motions the time, and two opposed faces of this paper web are all by successively dry.
Air bells cap device 198 blows to the woolen dry felt 176 that the top is lined with first dryer section 180 of woollen blanket with air, has squeezed the temperature of paper web so that reduce, and squeezes paper web thereby help heat is transferred to from drying cylinder.This air bells cap device can be arranged on several drying cylinders of first, second or the 3rd dryer section on request.
When by the paper web extended loop of woolen dry felt 176 supporting during around vacuum delivery paper bowl 188～192, hot-air bringing device 202 will hot-air at a high speed blows on the surface that paper web exposes.This high-speed and high-temperature air helps the carrying out of dry run, also helps to keep paper web to be right after the woolen dry felt 176 of adjacent support when paper web centers on 188～192 motions of vacuum delivery paper bowl and suppress the tendency of paper web generation transverse to the contraction on the machine run direction.
Gan Zao paper web is guided to the calendering nip that also passes through calender 210 from drying section 18 in the open draw mode.
Say that in more detail felt wrapped roll 212 is made when dry-web W is by calender 210 that by induction heater 214 heating the reverse side 196 of this paper web takes place directly to contact with the felt wrapped roll that has heated 212, dual character appears in the press polish paper web thereby stop.First side 161 of paper web is then first by press polish by taking place with the smooth surface 160 of back flow roll 158 that direct surface contacts already.
If necessary, this paper web can further be guided to making it pass through subsequently calender.This calender has the felt wrapped roll by the heating of other induction heater, so that first 161 of paper web W heated and press polish.
The invention provides a kind of paper making equipment of compactness, this equipment can be produced the press polish paper web with uniformity surface characteristic.
Press polish paper web with device fabrication of the present invention is high-quality, makes it to print on its two sides.In addition, the press polish paper web of making does not just have because in the wrinkling defect in the dry caused the sort of edge of the constraint that does not have paper web under the open draw situation etc.
And, partly make the present invention that a kind of paper making equipment with low cost can be provided owing to cancelled various suction rolls, press felt, woolen dry felt, drying cylinder etc.
Claims (47)
1, a kind of paper making equipment from paper pulp manufacturing paper web, this equipment comprises:
One in order to forming two net forming sections of paper web from paper pulp,
A press section that is positioned at this forming section downstream part in order to squeezing shaping paper web, the shaping paper web is not having under the situation of open draw, extends from described forming section to arrive described press section;
It is characterized in that described press section comprises:
A back flow roll;
A lengthening pressing device, described lengthening pressing device and described back flow roll co-operating are to limit a press section betwixt;
Described pressing device is configured on the described back flow roll;
Described back flow roll limits a smooth circumferential surface, and described circumferential surface directly contacts with described paper web, makes described paper web be configured between the smooth circumferential surface and described lengthening pressing device of described back flow roll; With
A single-tier dryer section that is positioned at the press section downstream part in order to dry-web.
2, equipment as claimed in claim 1 is characterized in that described forming section further comprises:
Co-operating is to limit the district that is shaped betwixt each other for the first and second annular forming nets, described two nets, and described shaping district has first and second ends;
One is right after the flow box that is adjacent to district's first end that is shaped, and described flow box limits a weir plate chamber, and there is an inlet and a slice opening described weir plate chamber;
Be positioned at described weir plate chamber upstream end and flow through the device of weir plate chamber paper pulp, make the shaping paper web of making be controlled transverse to the distribution of the croos profile on the machine run direction transverse to the CONCENTRATION DISTRIBUTION of machine run direction in order to change.
3, equipment as claimed in claim 2 is characterized in that the described device that distributes in order to the change pulp density also comprises:
Many transverse to machine run direction configuration and be right after the pipe fitting that is adjacent to described inlet;
In order to every described pipe fitting is supplied water with the coupling arrangement of diluted pulp concentration;
Make the pulp density flow through described every pipe fitting be controlled with described coupling arrangement co-operating so that regulates the paper pulp that sprays from slice opening at control device transverse to the concentration on the machine run direction.
4, equipment as claimed in claim 3 is characterized in that every pipe fitting of described multiple tubing element comprises:
A upstream element that limits a upstream conduit, described conduit has circular cross-sectional configuration on transverse to the machine run direction;
The downstream components of a certain downstream conduit of limit, described downstream conduit is in the cross-sectional configuration that rectangle is arranged on the machine run direction; With
Intermediary element between the element of described upstream and downstream, described intermediary element limits an intermediate conductor, and described conduit has circular cross section on transverse to the machine run direction.
5, equipment as claimed in claim 2 is characterized in that this forming section also comprises:
A forming shoe that is positioned at the district's first end downstream part that is shaped, this forming shoe limits a curved surface, described second net and described curved surface co-operating and be located at described curved surface and described first the net between, described forming shoe between the center of curvature and described press section of described curved surface, thereby improve described second the net stability.
6, equipment as claimed in claim 2 is characterized in that described forming section also comprises:
A couch roll that is disposed at the second end place in contiguous described shaping district, described first net is between described couch roll and described second net.
7, equipment as claimed in claim 2 is characterized in that described forming section also comprises:
Be disposed at the steam chest device of contiguous described first net, described steam chest device is between second end and described press section in described shaping district, so that the shaping paper web is carried out decatize.
8, equipment as claimed in claim 7 is characterized in that described steam chest device decatize shaping paper web, makes the temperature of the shaping paper web enter described press section within 60 °～98.89 ℃ scopes.
9, equipment as claimed in claim 2 is characterized in that described formation portion also comprises:
One and the crew-served fluted roller of described first net, described fluted roller is positioned at the downstream part of second end in the district that is shaped, and makes described first net between described fluted roller and described press section.
10, equipment as claimed in claim 9 is characterized in that described fluted roller also comprises:
Driven voller lid limit on a plurality of circumference, along the groove of machine run direction, described groove is removed first water from the shaping paper web by described first net in order to channel.
11, equipment as claimed in claim 10, it is characterized in that described driven voller covers at the elastic modelling quantity transverse to the machine run direction covers greater than described roller when the elastic modelling quantity along the machine run direction makes to stop described groove closure, allows described roller lid to produce deflection along the machine run direction.
12, equipment as claimed in claim 2 is characterized in that described press section also comprises:
One with the crew-served paper carrying roll of described first gauze, make the shaping paper web between described paper carrying roll and described first net, so that from the described first net neck shaping paper web and it is directed into described upside-down mounting add long nip press.
13, equipment as claimed in claim 10 is characterized in that described press section also comprises:
One with the crew-served paper carrying roll of described rill, to limit an initial dehydration nip betwixt, make that described shaping paper web is just between described paper carrying roll and described first is netted when shaping paper web and described first net move through described initial dehydration nip.
14, equipment as claimed in claim 13 is characterized in that the co-operating of described paper carrying roll and described driven voller lid, so that the shaping paper web moves through the time of staying that increases described shaping paper web during the initial dehydration nip.
15, equipment as claimed in claim 14, it is characterized in that described first water removes from the shaping paper web during described shaping paper web moves through initial dehydration nip, make that entering shaping paper web that described upside-down mounting adds long nip press has aridity in 20～35% scopes.
16, equipment as claimed in claim 12 is characterized in that described paper carrying roll is a suction roll, and described suction roll optionally is connected to a part of vacuum source.
17, equipment as claimed in claim 1 is characterized in that described press section also comprises:
One adds steam slot device between the long nip press in described forming section and described upside-down mounting, so that paper web is applied steam.
18, equipment as claimed in claim 17 is characterized in that described steam slot device comprises:
One and the crew-served steam groove of paper web;
One with the crew-served vacuum tank of described steam groove, make that extend in described forming section and described upside-down mounting adds paper web between the long nip press between described steam groove and described vacuum tank.
19, equipment as claimed in claim 1 is characterized in that described press section also comprises:
One in order to support paper web and paper web is carried the press felt that passes through described press section from forming section;
Described paper web is disposed between the smooth circumferential and described press felt of described back flow roll, and this configuration makes a side of paper web directly contact with the smooth circumferential surface of described back flow roll.
20, equipment as claimed in claim 19 is characterized in that described press section also comprises:
The crew-served scraper of smooth circumferential surface with described back flow roll, described scraper optionally sweep from the described surface of described back flow roll and squeeze paper web.
21, equipment as claimed in claim 19 is characterized in that described press section also comprises:
A device makes the time of staying of the paper web that extends through described lengthening press. nips in described device increase, to remove a part of water from paper web.
22, equipment as claimed in claim 21 is characterized in that described lengthening pressing device is a hydrokinetic forming shoe.
23, as device as described in the claim 21, it is characterized in that described lengthening pressing device is a hydrostatic forming shoe.
24, equipment as claimed in claim 21 is characterized in that described upside-down mounting adds long nip press and also comprises:
A ring-shaped bearing felt that extends through described lengthening press. nips.Described felt is disposed between described lengthening pressing device and the described press felt, and this configuration makes described lengthening pressing device be enclosed in the described ring-shaped bearing felt.
25, equipment as claimed in claim 21 is characterized in that having aridity in 36～75% scopes from the paper web that squeezes that described lengthening press. nips is emerged.
26, equipment as claimed in claim 1 is characterized in that this press section also comprises:
A pulper that is positioned at below this press section is in order to have squeezed paper web and received the paper web of squeezing that adds long nip press from described upside-down mounting before by described single-tier dryer section leading the shaping paper web to receive the shaping paper web that comes from described forming section in by the process of starting working before the described press section and leading.
27, equipment as claimed in claim 1 is characterized in that described single-tier dryer section also comprises:
One adds the crew-served vacuum dancing roll of long nip press with described upside-down mounting, and described vacuum dancing roll is connected to a partial vacuum source, in order to add long nip press neck shaping paper web from described upside-down mounting and described shaping paper web is directed into described single-tier dryer section;
Woolen dry felt around described vacuum dancing roll, make that having squeezed paper web adds between the long nip press at described woolen dry felt and described upside-down mounting, this configuration makes when the vacuum dancing roll is connected to described partial vacuum source, adds the paper web of squeezing between the long nip press in described woolen dry felt and described upside-down mounting and just is pulled to described vacuum dancing roll and transfers on the woolen dry felt squeezing paper web.
28, equipment as claimed in claim 27 is characterized in that described vacuum dancing roll also comprises:
A perforation housing, make when the vacuum dancing roll is connected to described partial vacuum source, this vacuum just is applied on the full width width that squeezes paper web by described woolen dry felt, adds long nip press with the paper web of squeezing with the full width width from described upside-down mounting and transfers to described woolen dry felt.
29, equipment as claimed in claim 20 is characterized in that described single-tier dryer section also comprises:
One is disposed at and is right after the vacuum paper carrying roll that adjoins described scraper place, make when an afterbody that squeezes paper web when the described surface of described back flow roll sweeps, described afterbody just is drawn on the vacuum dancing roll, make this afterbody add long nip press and transported that this configuration makes squeezes paper web and automatically led by described single-tier dryer section by the vacuum dancing roll from described upside-down mounting.
30, equipment as claimed in claim 21 is characterized in that described single-tier dryer section also comprises:
One first individual layer dryer section;
The described first individual layer dryer section comprises:
A plurality of drying cylinders,
A plurality of drying cylinder and vacuum delivery paper bowls between two adjoining drying cylinders that are right after contiguous described first dryer section that are disposed at;
One alternately around the woolen dry felt of described each drying cylinder of first dryer section and adjoining vacuum delivery paper bowl, makes and has squeezed paper web between described woolen dry felt and each drying cylinder, so that at least a side of squeezing paper web is heated.
31, equipment as claimed in claim 30 is characterized in that described first dryer section also comprises:
With the crew-served air bells cap device of at least one drying cylinder in described a plurality of drying cylinders, in order to air is blowed to and by described woolen dry felt, to reduce the temperature of having squeezed paper web, be transferred to the heat that squeezes paper web thereby increase from described drying cylinder, described woolen dry felt centers between the paper web of squeezing of described drying cylinder at described air bells cap device and extension.
32, equipment as claimed in claim 30 is characterized in that described single-tier dryer section also comprises:
With the crew-served hot-air bringing device of at least one vacuum delivery paper bowl in described a plurality of vacuum delivery paper bowls, described hot-air bringing device is connected to the heated air source of a pressurization, to improve the rate of drying of paper web.
33,, it is characterized in that described hot-air bringing device when being connected to described pressurized heat air source, just air-flow blown to the paper web of squeezing that extends around described vacuum delivery paper bowl as device as described in the claim 32.This configuration makes has squeezed paper web between described hot-air bringing device and described woolen dry felt.
34, equipment as claimed in claim 33, the flowing velocity scope that it is characterized in that described thermal air current is 3048～6096 meters/minute and the temperature range of air flow is 204.44 °～371.11 ℃, described air-flow is blown over from described hot-air bringing device and is squeezed paper web, arrives the vacuum delivery paper bowl by described woolen dry felt then.
35, equipment as claimed in claim 33 is characterized in that described hot-air bringing device also comprises:
Be connected to the vacuum plant in a partial vacuum source, in order to described air-flow has been squeezed paper web from this after squeezing paper web and takes away blowing to.
36, equipment as claimed in claim 34 is characterized in that described hot-air bringing device also comprises:
In order to optionally controlling described air-flow transverse to the croos profile adjusting device that flows relatively on the machine run direction, to regulate dry-web transverse to the degree of drying on the machine run direction.
37, equipment as claimed in claim 30, the diameter that it is characterized in that each drying cylinder in described a plurality of drying cylinder is within 1.83～2.44 meters scopes.
38, equipment as claimed in claim 1 is characterized in that also comprising:
A calender that is positioned at described single-tier dryer section downstream part.
39, equipment as claimed in claim 38 is characterized in that described upside-down mounting adds long nip press and comprises:
Direct surface takes place with a side of shaping paper web and contacts in a back flow roll that limits smooth circumferential surface, its smooth circumferential surface, and described calender also comprises:
A felt wrapped roll;
One is disposed to be right after and adjoins felt wrapped roll and sentence induction heater to the heating of described felt wrapped roll, and this configuration makes the described felt wrapped roll that has heated directly contact second of dry-web, and stoping, dual character appears in the press polish paper web.
40, equipment as claimed in claim 1 is characterized in that this equipment also comprises:
A calender that is positioned at described single-tier dryer section downstream part in order to press polish dry-web;
This calender also comprises:
A felt wrapped roll; With
One is disposed to be right after and adjoins described felt wrapped roll place in order to heating the heater of described felt wrapped roll, and this configuration makes the described felt wrapped roll that has heated directly contact with second side of dry-web, and dual character appears in the press polish paper web so that stop.
41, paper making equipment as claimed in claim 1 is characterized in that described equipment also comprises:
Described press section have only one in order to the shaping paper web from forming section guiding and make its press felt that passes through described press section, this configuration that the shaping paper web is held below described press felt to described squeezing branch from described forming section.
42, paper making equipment as claimed in claim 1 is characterized in that described equipment also comprises:
Described press section has a single pulper that is positioned at below the described press section, in order to lead paper web to receive before passing through press section from the broken of forming section and to receive other broken from described press section.
43, paper making equipment as claimed in claim 1 is characterized in that described equipment also comprises:
Described single-tier dryer section comprises:
One in order to carry out the first dry individual layer dryer section to a side of squeezing paper web; With
A downstream part that is positioned at described first single-tier dryer section carries out the second dry individual layer dryer section in order to the reverse side to paper web, and this configuration makes paper web not have under the situation of open draw, shifts between first and second drying sections.
44, paper making equipment as claimed in claim 1 is characterized in that described equipment also comprises:
Described single-tier dryer section comprises:
Individual layer dryer section with a plurality of drying cylinders;
Be disposed at and be right after the air bells cap device that adjoins a drying cylinder in described at least a plurality of drying cylinders, described air bells cap device blows to described drying cylinder with air-flow, this configuration makes paper web extend around between the woolen dry felt and described drying cylinder of described drying cylinder, make the paper web that extends around described drying cylinder be cooled, transmit with this heat of strengthening from described drying cylinder to paper web.
45, paper making equipment as claimed in claim 1 is characterized in that described equipment also comprises:
Described single-tier dryer section comprises:
An individual layer dryer section;
Described individual layer dryer section comprises:
A plurality of drying cylinders;
A plurality of vacuum delivery paper bowls, each vacuum delivery paper bowl are disposed to be right after and adjoin between the two adjoining drying cylinders;
One is alternately extended around the woolen dry felt of each drying cylinder and vacuum delivery paper bowl, makes when paper web moves through drying section, and paper web is at described woolen dry felt and each is between the cylinder;
The hot-air bringing device is disposed to be right after and one of adjoins in the described at least a plurality of vacuum delivery paper bowls of neck a vacuum delivery paper bowl, described hot-air bringing device is connected to the heated air source of a pressurization, in order to thermal air current is blowed to the paper web of squeezing that extends around described vacuum delivery paper bowl, this configuration makes that squeezed paper web places the hot-air bringing device and extend around between the woolen dry felt of described vacuum delivery paper bowl, thereby has strengthened the drying of paper web and suppressed dry-web transverse to the contraction on the machine run direction.
46, a kind of technical process from paper pulp manufacturing paper web, described technical process comprises the following steps:
Paper pulp was sprayed two net forming sections to form paper web from paper pulp;
Move through during the press section that is positioned at the forming section downstream part at the shaping paper web, described shaping paper web is squeezed; Make the shaping paper web not have under the situation of open draw, extend the described press section of arrival from described forming section, it is characterized in that described press section comprises a back flow roll and a lengthening squeezing forming shoe, the squeezing of described lengthening forming shoe and described back flow roll co-operating also are disposed on the described back flow roll, describedly directly contact with the smooth circumferential surface of described back flow roll by a narrow margin;
Move through during the single-tier dryer section that is positioned at the press section downstream part at paper web, the shaping paper web is carried out drying.
47,, it is characterized in that prepared paper web has surface characteristic relatively uniformly, has therefore improved the impressionability on the paper web two sides of making according to the paper web of the described device fabrication of claim 1.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US65471691A | 1991-02-13 | 1991-02-13 | |
| US654,716 | 1991-02-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1064119A CN1064119A (en) | 1992-09-02 |
| CN1028252C true CN1028252C (en) | 1995-04-19 |
Family
ID=24625979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92100830 Expired - Fee Related CN1028252C (en) | 1991-02-13 | 1992-02-10 | Papermaking apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1028252C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2369053B1 (en) * | 2007-12-21 | 2015-04-29 | Valmet Technologies, Inc. | Belt assembly and paper- or board making machine comprising the belt assembly |
| CN102817269A (en) * | 2012-06-08 | 2012-12-12 | 方汉佐 | Semi-wet blanket device of high-speed, reverse-net and multi-roller drying type special paper making machine |
| DE102016209780A1 (en) * | 2016-06-03 | 2017-12-07 | Voith Patent Gmbh | press section |
| CN106868918A (en) * | 2017-01-25 | 2017-06-20 | 广东华泰纸业有限公司 | A kind of corrugated paper making system |
-
1992
- 1992-02-10 CN CN 92100830 patent/CN1028252C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1064119A (en) | 1992-09-02 |
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