CN102066655A - Cooling of a cellulose pulp web - Google Patents
Cooling of a cellulose pulp web Download PDFInfo
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- CN102066655A CN102066655A CN2009801217874A CN200980121787A CN102066655A CN 102066655 A CN102066655 A CN 102066655A CN 2009801217874 A CN2009801217874 A CN 2009801217874A CN 200980121787 A CN200980121787 A CN 200980121787A CN 102066655 A CN102066655 A CN 102066655A
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F5/00—Dryer section of machines for making continuous webs of paper
- D21F5/18—Drying webs by hot air
- D21F5/185—Supporting webs in hot air dryers
- D21F5/187—Supporting webs in hot air dryers by air jets
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/18—De-watering; Elimination of cooking or pulp-treating liquors from the pulp
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F5/00—Dryer section of machines for making continuous webs of paper
- D21F5/18—Drying webs by hot air
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F5/00—Dryer section of machines for making continuous webs of paper
- D21F5/18—Drying webs by hot air
- D21F5/185—Supporting webs in hot air dryers
- D21F5/187—Supporting webs in hot air dryers by air jets
- D21F5/188—Blowing devices
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G7/00—Damping devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
- F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
- F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
- F26B13/101—Supporting materials without tension, e.g. on or between foraminous belts
- F26B13/104—Supporting materials without tension, e.g. on or between foraminous belts supported by fluid jets only; Fluid blowing arrangements for flotation dryers, e.g. coanda nozzles
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
- Drying Of Solid Materials (AREA)
Abstract
A pulp dryer (1) is operative for drying a web (2) of pulp by means of hot air in accordance with the air borne web (2) principle and comprises a cooling zone (10) having a length along which the web (2) is made to travel. The cooling zone (10) comprises a plurality of cooling blow boxes (18, 20) being distributed along the length of the cooling zone (10) and being operative for blowing cooling air towards the web (2). Furthermore, the cooling zone (10) comprises at least one liquid supply device (22, 24) being operative for supplying cooling liquid directly onto the web (2).
Description
Technical field
The present invention relates to the paddle board drying cylinder, the paddle board drying cylinder can be operated and be used for according to gas supporting plate principle hot air dries pulp board, and comprises having the cooling zone of plate along its length of advancing.
The invention still further relates to by described plate is advanced and pass the method that the cooling pulp board is distinguished in cooling.
Background technology
The paper pulp that is used to make paper and cardboard is used the drying cylinder oven dry according to the convection-type of gas supporting plate operate usually.The example of this drying cylinder has been described in US4505053.Hot-air blows on the pulp board by bellows on shown in Fig. 4 of US4505053 and following bellows.Give plate so that make its oven dry by the air transfer of heat that bellows blows out, and holding plate swims in down the stabilizing distance place, top of bellows.Hot-air is fed to bellows by (comprising the steam radiator of air blast and heat drying air) gas-circulating system.The gas supporting plate conveyer of stable and fixing position also obtains describing in US3231165 on a pair (a deck of) bellows.Complete paddle board drying cylinder has been shown in WO99/36615.
Leave the paper pulp that the quilt of the dry section of paddle board drying cylinder dries and have quite high mean temperature, in 55-100 ℃ scope, measured in the paper pulp bag as collection dry section after usually.Have been found that this high temperature can damage pulp quality, causes the reduction of brightness of pulp in the storing process of paper pulp.For fear of the problem that brightness of pulp reduces, attempted its packing (being used for transportation) paper pulp of cool drying before.WO02/50370 discloses by the drying cylinder of subregion, and wherein last zone provides the cooling air, so that realize the cooling of pulp board.
Summary of the invention
The purpose of this invention is to provide the method for cooling off pulp board, this method is more effective than the method for prior art.
This purpose realizes that by the paddle board drying cylinder this paddle board drying cylinder can be operated and be used for according to gas supporting plate principle hot air dries pulp board, and comprises having the cooling zone of plate along its length of advancing.Described cooling zone is characterised in that and comprises a plurality of drum cooler bellows and at least one liquid supplying apparatus; The drum cooler bellows are along the distribution of lengths of cooling zone, and can be operated and be used for to but air of plate blast-cold; Liquid supplying apparatus can be operated and be used for directly providing cooling fluid in described cooling zone on plate.
The advantage of cooling zone provides very effective cooling to plate, and the consumption of cooling water and cooling air is low, and the humidity increase of plate is very limited.Effectively to cause leaving the plate temperature of paddle board drying cylinder lower in the cooling of plate, and reduced may be relevant with the pulp board of heat the problem that descends of quality of colour.
According to preferred embodiment, described liquid supplying apparatus be positioned at along the length of cooling zone, the advanced position of 25-80% of length of cooling zone of plate, as what see from the starting point of cooling zone.Have been found that can offer pulp board along this position of the liquid supplying apparatus of the length of cooling zone especially effectively cools off.
According to an embodiment, described liquid supplying apparatus comprises at least one nozzle.Nozzle take to distribute the effectively onboard effective means of cooling fluid.
According to an embodiment, described cooling zone comprises at least two liquid supplying apparatus that are positioned at along the diverse location of the length of cooling zone, at least one in the described liquid supplying apparatus be positioned at along the length of cooling zone, the advanced position of 25-80% of cooling zone length of plate.The advantage of this embodiment is that more substantial liquid can be employed onboard, and can not form moist zone in the cooling zone.Preferably, all described diverse location all is positioned at the advanced place of length 25-80% of cooling zone of plate.
According to an embodiment, described liquid supplying apparatus comprises and can be operated the top that is used for the coldplate upper surface and can be operated the bottom that is used for the coldplate lower surface.Not only made cooling become more effective in the advantage of supply liquid on the upper surface of plate but also on the lower surface at plate.
According to an embodiment, described cooling zone comprises that a plurality of distribution of lengths and can being operated along the cooling zone are used for respectively to the upper surface of plate and lower surface the blast-cold but last drum cooler bellows and the following drum cooler bellows of air.For described same reason above, if not only to the upper surface of plate but also to but air of the lower surface blast-cold of plate, the cooling of plate just becomes more effective so, and is special in thick plate.
Another object of the present invention provides the method for cooling pulp board, and this method is more effective than the method for prior art.
This purpose is achieved by described plate being advanced pass the cooling zone to cool off the method for pulp board, and this method feature is, in described cooling zone, cools off described plate by following steps:
Described plate is advanced through the drum cooler bellows of a plurality of distribution of lengths along the cooling zone, and blow the cooling air of temperature with described drum cooler bellows to plate with 0-45 ℃, and at least one along the position of the length of cooling zone directly to the one or both sides of plate supply cooling fluid.
The advantage of this method is that the cooling of plate is effectively with rapidly.
According to preferred embodiment, described method also is included in along at least one position of the length of cooling zone directly supply cooling fluid on plate, and in this position, the advanced 25-80% of length of cooling zone of plate is as what see from the starting point of cooling zone.
According to one embodiment of present invention, at supply cooling fluid on plate directly, at the advanced 35-75% of length of cooling zone of this location plate, as what see from the starting point of cooling zone along at least one position of the length of cooling zone.Have been found that at this position supply cooling fluid effective especially for the cooling of plate.
According to one embodiment of present invention, this method also comprises the temperature of the plate of measuring downstream, described cooling zone, and with respect to the described temperature of the plate in downstream, described cooling zone, control is fed to the amount of the cooling fluid of described cooling zone.The advantage of this embodiment is the amount that the amount of the cooling fluid of supply is not higher than the needed cooling fluid of paper pulp that obtains suitable mean temperature after the cooling zone.
According to one embodiment of present invention, control the cooling fluid that is supplied according to the temperature of the plate of the upstream of cooling zone.The advantage of this embodiment is promptly to adapt to the change that takes place in dry run.
According to one embodiment of present invention, this method comprises the temperature of measuring the cooling air be fed to described cooling zone, and with respect to the described temperature of the cooling air that is fed to described cooling zone, control is fed to the amount of the cooling fluid of described cooling zone.The advantage of this embodiment is that the control of cooling zone can promptly be reacted to the variation of cooling air temperature, so that the variation of cooling air temperature can not influence the temperature of the plate that leaves the cooling zone in disadvantageous mode.
To become obvious according to specification and claims other purpose of the present invention and feature.
Description of drawings
Now will describe the present invention with reference to the accompanying drawings in detail, wherein:
Fig. 1 is schematic side view, and the paddle board drying cylinder is shown.
Fig. 2 is the side view that amplifies, and the area I I of Fig. 1 is shown.
Fig. 3 is the profile of cooling zone, is seen as the line III-III along Fig. 2.
Fig. 4 is the schematic side view of cooling zone, and the diverse location of nozzle is shown.
Fig. 5 is a chart, is illustrated in the cooling effect of diverse location spray cooling water.
Fig. 6 is a chart, is illustrated in the effect of diverse location spray cooling water.
The schematically illustrated control device of Fig. 7.
Two modes of the schematically illustrated control spray of Fig. 8 cooling fluid.
The specific embodiment
Fig. 1 illustrates the cellulose paddle board drying cylinder 1 according to the work of gas supporting plate principle.Wet cellulose paper pulpboard 2 enters paddle board drying cylinder 1 at inlet 4.Arrow A display plate 2 passes the direct of travel of paddle board drying cylinder 1.Plate 2 is transported and passes a plurality of bellows 6 and following bellowss 8 gone up.Bellows 6,8 blows the dry air of heat usually on wet plate 2 with 110-200 ℃ temperature.The dry air holding plate 2 that is blown out by following bellows 8 is in floating state, that is, make in the passage of plate 2 between bellows 6,8 to be held up by gas.The design example of bellows can find in US4719708.As shown in Figure 1, the plate 2 that wets passes the baking zone 9 of paddle board drying cylinder 1 through a plurality of drying channels.Paddle board drying cylinder 1 is provided with cooling zone 10, and it is positioned at the downstream of baking zone 9 and will illustrates in greater detail hereinafter.Partition wall 12 separates cooling zone 10 and baking zone 9.The paper pulp of being dried and being cooled leaves paddle board drying cylinder 1 in outlet 14 with the form of the pulp board 16 of drying, cooling at last, and described pulp board 16 has the temperature less than 50 ℃ usually.
Fig. 2 be Fig. 1 area I I zoomed-in view and the details of cooling zone 10 is shown.The mixture work that cooling zone 10 usefulness of paddle board drying cylinder are made up of cooling air and the cooling fluid of taking the form of water.Cooling zone 10 is provided with a plurality of (promptly at least two) goes up drum cooler bellows 18 and following drum cooler bellows 20.Last drum cooler bellows 18 and following drum cooler bellows 20 have the conventional design identical with the bellows described according to Fig. 1 hereinbefore 6,8 and according to similarly principle work, therefore by drum cooler bellows 18,, the 20 cooling air holding plates 2 that blow out 10 also are in by gas and hold up state in the cooling zone.But the air that blows on the plate 2 by drum cooler bellows 18,20 is not the dry air of heat, but cools off air, normally has the surrounding air of 0-45 ℃ temperature usually, and more frequent is 15-40 ℃.
Except drum cooler bellows 18,20, cooling zone 10 also is provided with nozzle 24 under one group of top nozzle 22 and a group.Top nozzle 22 (wherein having only a nozzle can see in Fig. 2) is installed on the top nozzle bearing 26 that extends to across the width of plate 2.Following nozzle 24 is installed on the following nozzle bearing 28 that extends to across the width of plate 2.
Fig. 3 is the part sectioned view of cooling zone 10, as what see along the direction of the arrow III of Fig. 2.As can be seen, top nozzle bearing 26 supports a plurality of top nozzles 22.Pipe 30 can be operated and be used for upward nozzle 22 supply cooling waters.In addition, following nozzle bearing 28 supports a plurality of nozzles 24 down, and pipe 32 can be operated and be used for supplying with cooling water to these nozzles 24.Nozzle 22,24 can be operated and be used for spraying cooling water on plate 2, cools off in the mode that will be described in more detail below so that make it.Top nozzle 22 directly sprays cooling water on the upper surface of plate 2, and nozzle 24 directly sprays cooling water on the lower surface of plate 2 down. Nozzle 22,24 distributes equably along their nozzle bearings 26,28 separately, so that provide the basic of cooling water of being sprayed to distribute uniformly across the width of plate 2.
The nozzle TPU that an example that can be used to the nozzle of spray cooling water on plate is a model 1100050, this is a flat nozzle with spray angle of 110 °, is to obtain from the Spraying Systems company that the favour of Illinois, USA is paused.Usually this nozzle can be worked under the hydraulic pressure that is higher than environmental pressure 2-6 crust.Central authorities' volume diameter is usually in the scope of 0.1-0.4mm.The temperature of cooling water is usually in 0-35 ℃ scope.
The water cooling plant that Fig. 4 illustrates one or more types of describing according to Fig. 2 and Fig. 3 hereinbefore is 10 diverse location along the cooling zone, and each this water cooling plant all comprises top nozzle 22 and following nozzle 24.As mentioned above, cooling zone 10 comprises a plurality of drum cooler bellows 18 and a plurality of drum cooler bellows 20 down gone up.Cooling zone 10 can have length L usually, and to last one, length is 20-140m from first of drum cooler bellows 18,20. Drum cooler bellows 18,20 distribute along length L substantially equably.As will describing hereinafter, nozzle 22,24 should be along the cooling zone 10 length L be positioned at very concrete position so that realize the best cooling of plate 2.Arrow A display plate 2 passes the direction of advancing in cooling zone 10.
Fig. 4 illustrates along the cooling zone four positions of 10, wherein may be provided with one or more water cooling plants that comprise nozzle 22,24.These four positions are named as " 0% ", " 40% ", " 60% " and " 80% ".Percentage is represented the percentage of the length L of cooling zone 10.Therefore, " 0% " refers in the cooling zone position of 10 starting point B, and described starting point B is the position of first drum cooler bellows 18,20 of cooling zone 10, referring to the direct of travel of plate 2.In addition, " 40% " refers to plate 2 through 40% position of the length of cooling zone 10, or the like.Therefore, for having length L is 50 meters cooling zone 10, " 40% " should refer to 20 meters position apart from the starting point B of cooling zone 10, " 60% " should refer to 30 meters position apart from the starting point B of cooling zone 10, and " 80% " should refer to 40 meters position apart from the starting point B of cooling zone 10.
Fig. 5 is a chart, and the test result that obtains when the diverse location of 10 the length L along the cooling zone is provided with nozzle 22,24 when according to Fig. 4 is shown.Should be appreciated that some tests only spray water in a position of 10 the length L along the cooling zone, and in other test at two diverse locations water sprays of 10 length L along the cooling zone.In the test of two diverse location spray cooling waters, each has all equipped top nozzle 22 and the following nozzle 24 that is provided with Fig. 2 and form shown in Figure 3 described two diverse locations at those.Therefore, in all tests, both on the upper surface of plate 2, sprayed water, also on the lower surface of plate 2, sprayed water in each described position.Table 1 has been summed up the test of carrying out:
Table 1: eject position and at the injection flow rate of various eject positions.
Fig. 5 illustrates the test result in the chart.On Y-axis with ℃ show with in the cooling zone 10 situations about cooling off by drum cooler bellows 18,20 compare the decline of surface temperature.Therefore, " 0 ℃ " should refer to the situation that does not at all have the cooling water effect on Y-axis, that is, cooling effect only comes from the cooling air.The temperature of cooling air approximately is 28 ℃.Usually, as when not having the cooling effect of cooling water, measure the paper pulp bag of collecting after cooling zone 10, average paper pulp temperature is 38-42 ℃.Therefore, " 0 ℃ " should be corresponding to 38-42 ℃ of average paper pulp temperature on the Y-axis of Fig. 5.In addition, cooling water has about 15 ℃ temperature.Pulp board is common soft wood pulp board, and has about 830 to 860g/m
2Basis weight, as measured according to TAPPIT410.Pulp board 2 has the overall width of about 4.2m, but the cooling test is to carry out on the width of about 500mm.The aridity of 10 starting point B pulp board 2 approximately is 89% in the cooling zone, as measured according to TAPPIT412.The length L of cooling zone 10 approximately is 40 meters.Plate 2 is advanced with the speed of about 150m/min and is passed cooling zone 10.The total amount of on X-axis, representing the water that sprays to plate 2 with l/h.
As seeing from Fig. 5, test No. 1-3 and 5 result under the water spray flow condition of about 110l/h is about 8 ℃ of plate 2 coolings.Test No. 6, all cooling waters all are used in the starting point B of cooling zone 10, and the result is about 3-4 ℃ of identical water spray flow condition lower plate 2 cooling.Test No. 4 result under identical water spray flow condition is 7 ℃ of plate 2 coolings.The moisture and the eject position of the plate of measuring after cooling zone 10 2 are irrelevant substantially.Therefore, there is tremendous influence the position of 10 length L nozzle 22,24 to cooling effectiveness along the cooling zone, but limited to the moisture influence of paper pulp.
Fig. 6 illustrates by in the but planned cooling of air and the mode pulp board that combines at the diverse location water spray along the length of cooling zone of cooling zone blast-cold.Analyze by the Mathematical Modeling on the basis that is similar to test result shown in Figure 5.Make analysis for being similar to device shown in Figure 4.The cooling water flow velocity is defined in about 115l/h, and cooling water has about 15 ℃ temperature, and the temperature of cooling air approximately is 28 ℃.Analog board is common soft wood pulp board, and has the about 850g/m measured according to TAPPIT410
2Basis weight and the about width of 500mm.The aridity of 10 starting point B pulp board approximately is 89% in the cooling zone, as measured according to TAPPIT412.The cooling zone has 40 meters length L.Plate 2 is advanced with the speed of about 150m/min and is passed cooling zone 10.In all cases, only spray water facing to pulp board 2, but both above pulp board, also below pulp board, spray water in this position a position.The X-axis of Fig. 6 refers to along the cooling zone position of 10 length L water spray.Therefore, " 0% " refers in the cooling zone position of 10 starting point B, as what see along the direct of travel of plate 2, and as shown in Figure 4.In addition, " 10% " refers to 10% the position of plate 2 through the length L of cooling zone 10, or the like.On the Y-axis of Fig. 6, with the decline of comparing surface temperature with situation about cooling off by drum cooler bellows 18,20 cooling zone 10 in ℃ is shown.Therefore, " 0 ℃ " on Y-axis should refer to the situation that does not at all have the cooling water effect, promptly only from the cooling effect of cooling off air.
As can seeing from Fig. 6, cooling effectiveness is best when at the position of the 25%-80% of the length L that is positioned at cooling zone 10 water spray, as from the cooling zone shown in Fig. 4 10 starting point B saw.Therefore, the nozzle 22,24 of Fig. 4 should be positioned at the position corresponding to the 25%-80% of the total length L of cooling zone 10, as from the cooling zone 10 starting point B saw.Therefore, if cooling zone 10 has 50 meters total length, nozzle 22,24 should be positioned at from the cooling zone position of at least 12.5 meters of 10 starting point B so, and 10 starting point B is no more than 40 meters from the cooling zone.In addition, again according to Fig. 6, the position of nozzle 22,24 more preferably scope be in the cooling zone 10 length L 35% to 75%, as from the cooling zone 10 starting point B saw, and the preferred scope in position of nozzle 22,24 be in the cooling zone 10 length L 45% to 70%, as from the cooling zone 10 starting point B saw.The absolute best positions of nozzle 22,24 are the about 55% to 63% of 10 the length L in the cooling zone, as from the cooling zone 10 starting point B saw.
The schematically illustrated control valve 36 of Fig. 7, control valve 36 can be operated the amount that is used to regulate cooling fluid, and cooling fluid is supplied to nozzle schematically illustrated in Fig. 7 22,24 through pipe 38.Control device 40, process control computer for example can be operated and is used for adjusting control valve 36.The information that control device 40 receives from first temperature sensor 42 and second temperature sensor 44, first temperature sensor 42 can be operated and be used to measure the surface temperature of the pulp board 2 of 10 upstream in the cooling zone just, represent with arrow A that the direct of travel of pulp board 2, second temperature sensor 44 can be operated and be used to measure the surface temperature of the pulp board 2 in 10 downstream in the cooling zone just.
In addition, the schematically illustrated air blast 48 of Fig. 7, air blast 48 can be operated and be used for to above according to described drum cooler bellows 18 and following drum cooler bellows 20 supplied with cooling air of going up of Fig. 2.Should be appreciated that in fact having more than one air blast 48 gives drum cooler bellows 18,20 supplied with cooling air.Get back to Fig. 7, air temperature sensor 50 can be operated and be used to measure the temperature of being given the cooling air that drum cooler bellows 18,20 provide by air blast 48.Air temperature sensor 50 sends signal for control device 40.Therefore, when control control valve 36, control device 40 can work at the temperature of cooling air, particularly works at the change of the temperature of cooling off air.
The schematically illustrated two kinds of possible modes that comprise from the feed-forward signal (as shown in Figure 7) of first temperature sensor 42 of controlling control valve 36 of Fig. 8.The dual mode itself that works at feed-forward signal from the other technologies field in control flow chart all is known.In first replacement scheme of representing with continuous lines in Fig. 8, from the setting value and the feedback of output, that is, the temperature of the plate 2 after cooling zone 10 (as measured by second temperature sensor 44) is transfused to PID controller (proportional plus integral plus derivative controller).According to first mode of control control valve 36, wave filter q is passed through in measured interference i.e. temperature before cooling zone 10 (as measured by first temperature sensor 42)
FfObtain and influence from the output of PID controller, so that the signal that sends to control valve shown in Figure 7 36 from the PID controller has also been considered the interference of described measurement.According to second mode of control control valve 36, carry out so-called impulse compensation, shown in dashed lines among Fig. 8.Impulse compensation comprises by wave filter q
FfSend the interference (that is the temperature before cooling zone 10) of measuring potentially and arrive model, for example Mathematical Modeling as measuring by first temperature sensor 42.Come the output influence of self model to send to the input data of PID controller so that measured interference is worked.Should be appreciated that, can utilize similar control flow chart to have an effect to removing lucky other parameters the temperature of the plate before the cooling zone in the mode of feedforward.For example, can work (as by measured according to sensor shown in Figure 7 50 hereinbefore) with the mode of feedforward temperature to the control of the supply of cooling water to the cooling air.
The a plurality of modification that should be appreciated that top described embodiment are possible within the scope of the appended claims.
For example, can use the cooling zone that has following drum cooler bellows 20 and do not go up the drum cooler bellows., still only can produce still according to the work of gas holder principle according to this cooling zone of Fig. 4 than not only comprising drum cooler bellows 18 but also comprise the low slightly cooling effect in cooling zone of drum cooler bellows 20 down. the width of each drum cooler bellows 18,20 is as may changing in the limit of broad of seeing along the length L of cooling zone 10.Usually, each bellows may have the width of 100-500mm, as seeing along length L.
Hereinbefore, described that cooling water is fed to plate by nozzle 22,24 in the cooling zone.Should be appreciated that other devices also can be used to plate 2 supply water.This device comprises and for example soaks roller.For the reason of practice, preferred usually by nozzle 22,24 cooling water supplies.
Hereinbefore, having described a kind of possible cooling fluid is water.Though the normally preferred cooling fluid of water also has other possible cooling fluids.This other the example of cooling fluid comprises alcohol, for example ethanol and ethylene glycol and other ether.Cooling fluid can also comprise mixture, for example water and ethylene glycol.In addition, cooling fluid can also comprise chemical addition agent, constitutes usually less than 10% of cooling fluid, and chemical addition agent can provide useful effect for pulp quality.
Claims (16)
1. paddle board drying cylinder, it can be operated and be used for according to the principle of gas supporting plate (2) with hot air dries pulp board (2), and it comprises the have length cooling zone (10) of (L), and plate (2) is advanced along length (L).
It is characterized in that described cooling zone (10) comprise a plurality of drum cooler bellows (18,20) and at least one liquid supplying apparatus (22,24); The length (L) of (10) distributes described drum cooler bellows along the cooling zone, and can be operated and be used for to but air of plate (2) blast-cold; Described at least one liquid supplying apparatus can be operated and be used in described cooling zone (10) cooling fluid directly being supplied in plate (2).
2. paddle board drying cylinder according to claim 1, wherein, described liquid supplying apparatus (22,24) be set at along the cooling zone (10) length (L), the advanced position of 25%-80% of length (L) of cooling zone (10) of plate (2), seen as the starting point (B) of (10) from the cooling zone.
3. according to each described paddle board drying cylinder among the claim 1-2, wherein, described liquid supplying apparatus comprises at least one nozzle (22,24).
4. according to each described paddle board drying cylinder among the claim 1-3, wherein, described cooling zone (10) comprises at least two liquid supplying apparatus (22,24) of the diverse location of the length (L) that is positioned at along the cooling zone (10), at least one in described at least two liquid supplying apparatus (22,24) be arranged in along the cooling zone (10) length (L), the advanced position of 25%-80% of length of cooling zone (10) of plate (2).
5. paddle board drying cylinder according to claim 4, wherein, all described diverse locations all are positioned at the advanced place of 25%-80% of length (L) of cooling zone (10) of plate (2).
6. according to each the described paddle board drying cylinder in the aforementioned claim, wherein, described liquid supplying apparatus comprises the top (22) that can be operated the upper surface that is used for coldplate (2), and the bottom (24) that can be operated the lower surface that is used for coldplate (2).
7. according to each the described paddle board drying cylinder in the aforementioned claim, wherein, described cooling zone (10) comprises a plurality of drum cooler bellows and following drum cooler bellows (18 gone up, 20), describedly go up drum cooler bellows and described drum cooler bellows down the length (L) of (10) distributes along the cooling zone, and can be operated and be used for respectively to but air of the upper surface of plate (2) and lower surface blast-cold.
8. one kind is passed the method that described pulp board is cooled off in cooling zone (10) by pulp board (2) is advanced, and it is characterized in that, cools off described plate (2) by following step in described cooling zone (10):
The a plurality of drum cooler bellows (18,20) that described plate (2) advanced distribute through the length (L) of (10) along the cooling zone also blow the cooling air of the temperature with 0-45 ℃ by described drum cooler bellows (18,20) to plate (2), and
In at least one position of the length (L) of cooling zone (10), cooling fluid is directly being supplied on plate (2).
9. method according to claim 8, it also is included at least one position of the length of cooling zone (10) (L) cooling fluid is directly supplied on plate (2), in described at least one position, the advanced 25-80% of length (L) of cooling zone (10) of plate (2) is seen as the starting point (B) of (10) from the cooling zone.
10. each described method according to Claim 8-9, wherein, cooling fluid supply is on the upper surface and lower surface of plate (2).
11. each described method according to Claim 8-10, wherein, at supply cooling fluid at least two diverse locations of the length (L) of cooling zone (10), at least one in described at least two diverse locations be arranged in along the cooling zone (10) length (L), the advanced position of 25-80% of length (L) of cooling zone (10) of plate (2).
12. each described method according to Claim 8-11, wherein with cooling fluid directly supply along the length (L) of cooling zone (10), plate (2) advanced on the plate (2) at least one position of 35-75% of length (L) of cooling zone (10), seen as the starting point (B) of (10) from the cooling zone.
13. each described method according to Claim 8-12, it also comprises the temperature of the plate (2) in the downstream of measuring described cooling zone (10), and with respect to the described temperature of the plate (2) in the downstream of described cooling zone (10), control is fed to the amount of the cooling fluid of described cooling zone (10).
14. each described method according to Claim 8-13, the temperature that also comprises the plate (2) of the upstream of measuring described cooling zone (10), and with respect to the described temperature of the plate (2) of the upstream of described cooling zone (10), control is fed to the amount of the cooling fluid of described cooling zone (10).
15. each described method according to Claim 8-14, it also comprises collects and description is positioned at the relevant data of at least one machined parameters of operation of baking zone (9) of the upstream of described cooling zone (10), and is fed to the amount of the cooling fluid of described cooling zone (10) with respect to described Data Control.
16. each described method according to Claim 8-15, also comprise the temperature of measuring the cooling air that is fed to described cooling zone (10), and be fed to the amount of the cooling fluid of described cooling zone (10) with respect to the described temperature control of the cooling air that is fed to described cooling zone (10).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE0801446-6 | 2008-06-19 | ||
| SE0801446A SE532624C2 (en) | 2008-06-19 | 2008-06-19 | Cooling of a cellulose pulp web |
| PCT/SE2009/050724 WO2009154549A1 (en) | 2008-06-19 | 2009-06-12 | Cooling of a cellulose pulp web |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102066655A true CN102066655A (en) | 2011-05-18 |
| CN102066655B CN102066655B (en) | 2013-07-03 |
Family
ID=41434292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009801217874A Active CN102066655B (en) | 2008-06-19 | 2009-06-12 | Cooling of cellulose pulp board |
Country Status (6)
| Country | Link |
|---|---|
| CN (1) | CN102066655B (en) |
| BR (1) | BRPI0914818A2 (en) |
| CL (1) | CL2010001403A1 (en) |
| FI (1) | FI125145B (en) |
| SE (1) | SE532624C2 (en) |
| WO (1) | WO2009154549A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE535634C2 (en) | 2010-11-16 | 2012-10-23 | Andritz Tech & Asset Man Gmbh | Cellulose dryer having lower blow boxes and method of drying a web of cellulose pulp |
| SE536108C2 (en) * | 2010-11-16 | 2013-05-07 | Andritz Tech & Asset Man Gmbh | Drying box comprising at least two zones for drying a cellulose pulp web |
| DE212013000118U1 (en) | 2012-05-15 | 2015-01-30 | Andritz Technology And Asset Management Gmbh | Pulp dryer with blow boxes for drying a pulp web |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19614887A1 (en) * | 1996-04-16 | 1997-10-23 | Voith Sulzer Papiermasch Gmbh | Machine for the production of a material web |
| DE19901801C2 (en) * | 1999-01-19 | 2003-12-11 | Baldwin Germany Gmbh | Device for conditioning a paper web |
| FI110625B (en) * | 1999-02-22 | 2003-02-28 | Metso Paper Inc | Blowing device in paper machine or equivalent |
| US6735883B1 (en) * | 1999-10-15 | 2004-05-18 | Megtec Systems, Inc. | Electrostatic assisted web cooling and remoistening device |
| ES2159488B1 (en) * | 2000-03-07 | 2002-04-16 | Uriach & Cia Sa J | PROCEDURE FOR THE PREPARATION OF PIRIMIDONE DERIVATIVES WITH ANTIFUNGIC ACTIVITY. |
| WO2001088448A2 (en) * | 2000-05-17 | 2001-11-22 | Megtec Systems, Inc. | Water spray web cooling apparatus for web dryer |
| FI110626B (en) * | 2000-11-29 | 2003-02-28 | Metso Paper Inc | Method and apparatus for pre-drying fiber-based pulp tape |
| ES2261101B1 (en) * | 2006-05-22 | 2007-12-16 | Digital Internet Transport System, S.L. | PROCEDURE AND DEVICE FOR PAPER CONDITIONING. |
-
2008
- 2008-06-19 SE SE0801446A patent/SE532624C2/en unknown
-
2009
- 2009-06-12 WO PCT/SE2009/050724 patent/WO2009154549A1/en not_active Ceased
- 2009-06-12 CN CN2009801217874A patent/CN102066655B/en active Active
- 2009-06-12 BR BRPI0914818A patent/BRPI0914818A2/en not_active Application Discontinuation
-
2010
- 2010-12-10 CL CL2010001403A patent/CL2010001403A1/en unknown
- 2010-12-20 FI FI20106347A patent/FI125145B/en active IP Right Grant
Also Published As
| Publication number | Publication date |
|---|---|
| FI125145B (en) | 2015-06-15 |
| SE0801446L (en) | 2009-12-20 |
| CN102066655B (en) | 2013-07-03 |
| CL2010001403A1 (en) | 2011-06-03 |
| BRPI0914818A2 (en) | 2015-10-27 |
| SE532624C2 (en) | 2010-03-09 |
| WO2009154549A1 (en) | 2009-12-23 |
| FI20106347L (en) | 2010-12-20 |
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