WO2008145519A1 - Procédé et appareil pour sécher une nappe de pâte chimique - Google Patents

Procédé et appareil pour sécher une nappe de pâte chimique Download PDF

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Publication number
WO2008145519A1
WO2008145519A1 PCT/EP2008/055906 EP2008055906W WO2008145519A1 WO 2008145519 A1 WO2008145519 A1 WO 2008145519A1 EP 2008055906 W EP2008055906 W EP 2008055906W WO 2008145519 A1 WO2008145519 A1 WO 2008145519A1
Authority
WO
WIPO (PCT)
Prior art keywords
dryer
chemical pulp
web
pulp web
hot
Prior art date
Application number
PCT/EP2008/055906
Other languages
English (en)
Inventor
Matti Kurki
Matti Luhtanen
Original Assignee
Metso Paper, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Metso Paper, Inc. filed Critical Metso Paper, Inc.
Publication of WO2008145519A1 publication Critical patent/WO2008145519A1/fr

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Classifications

    • 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
    • D21F5/02—Drying on cylinders
    • D21F5/04—Drying on cylinders on two or more drying cylinders
    • D21F5/042—Drying on cylinders on two or more drying cylinders in combination with suction or blowing devices
    • D21F5/044—Drying on cylinders on two or more drying cylinders in combination with suction or blowing devices using air hoods over the cylinders
    • 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
    • D21F5/004—Drying webs by contact with heated surfaces or materials
    • 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
    • D21F5/02—Drying on cylinders
    • 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
    • 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
    • D21F5/181—Drying webs by hot air on Yankee cylinder

Definitions

  • the invention relates to a method for drying a chemical pulp web according to the preamble of the appended claim 1.
  • the invention also relates to a device for implementing the aforementioned method in accordance with the preamble of the appended claim 13.
  • a chemical pulp web is dried by means of a chemical pulp dryer, in which a hot gaseous medium is blown towards both surfaces of the web.
  • the chemical pulp dryer comprises several blower assemblies arranged on top of each other.
  • the blower assemblies consist of blower boxes installed next to each other over the whole cross-sectional area of the web and over the length of the chemical pulp dryer.
  • the blower boxes are equipped with nozzles, from which a gaseous medium is blown towards the web.
  • the medium may be, for example, hot air, steam or another medium suitable for the purpose.
  • the blower assemblies are arranged in the dryer so that the medium is blown from the blower boxes towards the web on its both sides.
  • the web runs forward, without touching the drying means, from one blower assembly to another by means of reversing rolls installed at the ends of the blower assemblies.
  • the moist chemical pulp web coming from the press and normally having, at this stage, a dry solids content of about 50%, is supplied from a supply plane which is normally in the top part of the chemical pulp dryer. From there, it moves downwards towards the bottom part of the chemical pulp dryer.
  • its dry solids content is typically about 90%.
  • a chemical pulp dryer of the above- described kind is disclosed, for example, in Finnish patent publication 102981 (corresponding US patent 6,230,422).
  • the chemical pulp dryer of the above-described type is functional as such, but it has certain disadvantages. First of all, it is not very efficient. The drying of a thick chemical pulp web takes a lot of time and energy. Furthermore, the transfer of the wet chemical pulp web from the press to the dryer is cumbersome and sometimes leads to a web break. Moreover, the web moves slowly in the dryer, and it is difficult to make its passage smooth in contactless drying, wherein the risk of a web break is high. In case of a break, the cleaning of the dryer is laborious and takes a long time. Furthermore, the chemical pulp dryer of the above-described type is bulky and requires a lot of space in a chemical pulp mill. Its energy consumption is also high.
  • the method according to the invention is primarily characterized in what will be presented in the characterizing part of the independent claim 1.
  • the device according to the invention is primarily characterized in what will be presented in the characterizing part of the independent claim 13.
  • the invention is based on the idea that the chemical pulp web coming from a press is dried in at least one dryer, in which both surfaces of the chemical pulp web are subjected to heat and in which at least one surface of the chemical pulp web is brought into contact with a hot thermal surface.
  • the chemical pulp web can be subjected to heat by any convective or radiative method or device suitable for the purpose, for example, either by blowing a hot gaseous medium, such as hot air or steam towards the web, by subjecting the web to thermal radiation, or by bringing the web into contact with a hot object.
  • a hot gaseous medium such as hot air or steam
  • the thermal surface, onto which the chemical pulp web is guided may be, for example, a cylindrical surface made of metal.
  • An impingement hood or box is arranged against the outer surface of the metal cylinder, spaced from it, to blow a hot gaseous medium, such as air or steam, towards the surface of the cylinder, heating the same.
  • the running web is led onto the hot surface of the heated cylinder, and as the cylinder rotates around its axis, the web is dried, both on its surface against the cylinder and on its other surface, towards which a hot gaseous medium is blown.
  • a drier is, for example, a so- called Yankee dryer.
  • the thermal surface may also be a metal band which is heated by means of a hot medium or thermal radiation.
  • the metal band is preferably an endless metal loop which moves in the machine direction by the effect of the rotational movement of rolls arranged inside the loop and rotating around their axes.
  • the chemical pulp web is brought into contact with the hot metal loop.
  • An impingement hood or box is arranged against the outer surface of the metal loop, spaced from it, to blow a hot gaseous medium towards the metal loop.
  • the running web is led onto the outer surface of the hot metal loop, and as the band runs forward into the range of the blowing box, the web is dried on both the surface against the cylinder and the other surface, towards which a hot gaseous medium is blown.
  • the thermal surface can be heated by means of any heat transfer medium or heater suitable for the purpose.
  • the heating can be either direct or indirect.
  • the heat transfer medium used may be hot steam, air, or liquid.
  • the heater may operate by convection or by radiation. What is essential is that the temperature of the thermal surface is raised to a temperature of at least 60 to 700 0 C, preferably 90 to 200 0 C.
  • the thermal surface coming against the chemical pulp web is preferably smooth.
  • the apparatus comprises two dryers.
  • the first dryer arranged after the press in the travel direction of the chemical pulp web comprises a component with a heatable hot thermal surface, onto which the web is guided.
  • the second dryer, placed after the first dryer in the travel direction of the chemical pulp web may be any dryer suitable for the drying of a chemical pulp web.
  • the second dryer may be, for example, a dryer similar to a conventional chemical pulp dryer equipped with blowing boxes, in which the chemical pulp web is dried in a contactless manner by blowing a hot gaseous medium towards both of its surfaces.
  • the second dryer may also be a Yankee dryer, or a cylinder dryer in which the web is moved forward by a number of heated cylinders.
  • the drying of the chemical pulp web becomes more efficient. Thanks to this, the drying capacity of the chemical pulp mill is increased, wherein the running speed of the pulp making machine can be raised. Furthermore, the amount of energy required for drying the chemical pulp, that is, the consumption of the hot gaseous medium, is reduced. Moreover, in an embodiment in which the second dryer is a conventional chemical pulp dryer equipped with blowing boxes, its physical size can be reduced even to a third compared with a dryer with no first dryer at all. As a result, the drying apparatus can be fitted more easily in a mill and it is less expensive than conventional chemical pulp drying apparatuses.
  • the properties of the chemical pulp fibres are improved.
  • shrinking of the web is prevented during its drying.
  • the chemical pulp web is thus subjected to tension in the machine direction, as a result of which the fibres are keratinized more than by the effect of shrinking during free drying.
  • the fibres absorb less water and the consumption of water is reduced.
  • the moisture content of the paper web is lower, whereby it is possible to reduce the steam pressures and the amount of steam required for its drying. Consequently, the drying capacity of the drying section of the paper machine is increased.
  • the wet strength and particularly the wet elasticity of the paper web made of the chemical pulp obtained as a result of drying under tension are higher than as a result of free drying, or the wet elasticity of chemical pulp obtained without tension.
  • Fig. 1 shows the wet elasticity of paper samples made of chemical pulps dried in different ways and further pulped and ground, as a function of the dry solids content.
  • Graph A shows originally undried wet chemical pulp
  • graph B shows originally freely dried chemical pulp
  • graph C shows chemical pulp dried originally under tension.
  • Fig. 1 shows a diagram on the effect of the method of chemical pulp drying on the wet strength of paper
  • Fig. 2 is a schematic view of a chemical pulp drying apparatus seen from the side
  • Fig. 3 is a schematic view of another chemical pulp drying apparatus seen from the side
  • Fig. 4 is a schematic view of a third chemical pulp drying apparatus seen from the side
  • Fig. 5 is a schematic view of a fourth chemical pulp drying apparatus seen from the side
  • Fig. 6 is a schematic view of a fifth chemical pulp drying apparatus seen from the side
  • Fig. 7 is a schematic view of a sixth chemical pulp drying apparatus seen from the side.
  • hot thermal surface refers to a smooth surface which has no embossing, marking or through holes and which is heated by a heat transfer medium or by thermal radiation either directly or indirectly to a temperature at which the drying of the chemical pulp web is possible. The temperature of the thermal surface is thus higher than the temperature of the chemical pulp web.
  • Figures 2 to 7 show embodiments of the invention, in which the drying part 1 for the chemical pulp web comprises two dryers: the first dryer 3 and the second dryer 4.
  • the first dryer the web is brought into contact with a hot thermal surface.
  • the second dryer 4 is a conventional chemical pulp dryer equipped with blowing boxes, in which the chemical pulp web is dried in a contactless manner by blowing hot air towards both surfaces of the web.
  • the chemical pulp web W runs forward in the dryer from one blower assembly to another by means of reversing rolls 8 installed at the ends of the blower assemblies.
  • the drying of the chemical pulp web takes place freely, without being subjected to a tension.
  • the chemical pulp web W dried to the final moisture content is led out of the second dryer 4 and further to finishing (the finishing apparatus is not shown in the figure).
  • the second dryer may also be a Yankee dryer, which embodiment is shown in Fig. 7, or a cylinder dryer.
  • the part 1 for drying the chemical pulp web shown in the figures is part of the apparatus for producing the chemical pulp web.
  • the other parts of the apparatus for producing the chemical pulp web are known as such, and they will not be explained in more detail in this context.
  • one or more guide rolls 18 are used, which are, for the sake of clarity, not all shown in the figures.
  • the chemical pulp web W conning from the press 2 is run into the drying section 1 in the direction of the arrow M.
  • Figures 2 and 3 show embodiments in which the hot thermal surface in the first dryer is implemented by means of a heated cylindrical surface.
  • the first dryer 3 shown in Fig. 2 is a so-called Yankee dryer comprising a drying cylinder heated with steam, that is, a Yankee cylinder 5, and an impingement hood 6 installed close to its outer surface. Part of the circumference of the Yankee cylinder 5 is covered by the halves 6a and 6b of the hood 6. A clearance is provided between the impingement hood 6 and the cylinder 5, and the impingement hood 6 is arranged to blow hot air towards the outer surface 5a of the Yankee cylinder.
  • the Yankee cylinder has a large diameter which may be even 5.5 metres.
  • the steam pressure inside the cylinder is about 8 bar, and the temperature of the outer surface of the cylinder is about 80 to 160 0 C.
  • the outer jacket of the Yankee cylinder is made of metal, and its outer surface is smooth.
  • the Yankee cylinder rotates around its axis, and its axial length extends over the width of the web to be dried.
  • the Yankee cylinder can also be heated by means of another heat transfer medium than steam, for example by hot gases.
  • the web W comes from the press 2 to the first drier 3, it is pressed against the thermal surface, that is, the surface 5a of the Yankee cylinder 5, and kept there for at least the time when the web runs on the Yankee cylinder 5 in the area covered by the impingement hood 6.
  • the web is guided onto and off the Yankee cylinder by means of auxiliary rolls 7.
  • the Yankee cylinder also comprises a number of other parts and components which are, for the sake of clarity, not shown in the figure. If desired, the web can be attached to the thermal surface 5a by adhesion.
  • a device 9 is provided close to the surface of the cylinder 5 to dispense a chemical onto the surface of the cylinder that makes the web adhere to the surface of the cylinder and further prevents shrinking in the direction of the axis of the cylinder, increasing the keratinization of the fibre.
  • the chemical pulp web is led into the second dryer 4, which is a conventional chemical pulp dryer equipped with blower boxes.
  • the operation of this type of a chemical pulp dryer is known as such for a person skilled in the art, wherein it will not be described in more detail in this context.
  • FIG 3 shows another embodiment in which the hot thermal surface in the first dryer is implemented by means of a heated cylindrical surface.
  • the first dryer 3 comprises a cylinder 10 heated with steam, having a large diameter, and rotating around its axis.
  • the temperature of the outer surface of the cylinder is raised to about 80 to 160 0 C.
  • the outer surface 10 of the jacket of the cylinder 10 is smooth, and the axial length of the cylinder extends over the width of the web W to be dried.
  • An impingement hood 11 is installed close to the outer surface 10a of the cylinder 10, at a distance from it.
  • the length of the impingement hood 11 in the axial direction of the cylinder 10 is equal to the length of the cylinder 10, and the impingement hood 11 covers part of the circumference of the cylinder 10.
  • the impingement hood with a single-piece structure is arranged to blow hot air towards the outer surface 10a of the cylinder.
  • first drying part 3 and the drying of the chemical pulp web on two sides are substantially similar to those of the embodiment described above in connection with Fig. 2.
  • the web W enters the first dryer 3 it is pressed against the surface 10a of the cylinder 10 and kept there for at least the time when the web runs in the area covered by the impingement hood 11.
  • the web is guided onto and off the cylinder by means of auxiliary rolls 7.
  • the first dryer also comprises a number of other parts and components which are, for the sake of clarity, not shown in the figure.
  • Figures 4 to 6 show embodiments in which the hot thermal surface in the first dryer is implemented by means of at least one heated metal loop.
  • the metal loop is made of a flexible uniform metal band in the travel direction of the web, or a metal band consisting of several band-like or thread-like strands, to make an endless loop which is wound via several rotating rolls supporting the metal band. Some of the rolls are driving rolls, or drawing rolls. Some of the rolls are placed so that the path of the metal loop is turned by them to another direction. Some of the rolls are only used as rolls to support the metal loop.
  • the width of the metal loop extends at least over the width of the web to be dried.
  • the metal loop is heated by means of heaters provided inside or outside the loop. The heaters extend over the width of the metal band.
  • Heaters may also be placed in pairs on both sides of the metal loop, wherein the same location of the loop is heated on its both sides simultaneously.
  • the heaters may be any heaters suitable for the purpose, and the heat transfer medium used may be, for example, hot air or infrared or microwave radiation.
  • the temperature of the outer surface of the metal loop is raised by the heaters to about 90 to 230 0 C.
  • the first dryer 3 in Fig. 4 comprises one endless metal loop 12.
  • the metal loop 12 is guided via several rotating rolls 13 supporting the metal loop 12. Some of the rolls 13 guide the path of the metal band, and some of the rolls 13 are only used as rolls for supporting the metal loop 12.
  • the supporting rolls are used to control the deflection of the band, which plays a great role in the efficiency of the impingement drying.
  • the heaters heating the metal loop 12 from the inside are indicated with the reference numeral 14.
  • the heaters may also be placed outside the metal loop, which alternative is shown by broken lines in the figures.
  • the metal loop 12 with its heaters forms a part of the first dryer 3.
  • the first dryer 3 also comprises an impingement hood 15 installed close to the outer surface of the metal loop 12, spaced from it.
  • the impingement hood 15 comprises means (not shown in the figure) for blowing hot air towards the outer surface 12a of the metal loop 12.
  • the impingement hood 15 is installed perpendicularly to the width of the metal loop, and it extends over the width of the metal loop. In the travel direction of the chemical pulp web W, the impingement hood covers substantially that part of the metal loop 12 which is in contact with the chemical pulp web W. If desired, the metal loop 12 may also extend, and the web may be in contact with it, outside the range of the impingement hood.
  • the metal loop 12 is supported in the cross direction of the metal loop in the range of the impingement hood 15 by several rolls 13 spaced from each other.
  • the chemical pulp web W conning from the press 2 is run to the drying section 1 in the direction of the arrow M.
  • the web W is guided onto the outer surface 12a of the metal loop 12, where it runs in contact with the loop at least the length that the web runs in the area covered by the impingement hood 15.
  • Figure 5 shows an embodiment, in which the drying of the chemical pulp web in the first dryer 3 is made more efficient by arranging two impingement hoods 15a and 15b to blow hot air towards the chemical pulp web W running on the metal loop 12.
  • the metal loop 12 is heated by a heater 14 placed outside the metal loop.
  • An alternative arrangement, that is, the placement of the heater 14 inside the metal loop 12, is shown by broken lines in the figure.
  • the method of drying shown in Fig. 5 is particularly efficient for chemical pulp webs with a high grammage.
  • the drying of the chemical pulp web is boosted not only by the two impingement hoods but also because the path travelled by the chemical pulp web on the heated metal loop is considerably longer than, about twice as long as in the embodiment shown in Fig. 4.
  • the chemical pulp web W coming from the press 2 is guided onto the outer surface 12a of the metal loop 12 where it runs in contact with the loop first through the area covered by the first impingement hood 15a and then through the area covered by the second impingement hood 15b.
  • the metal loop 12 is guided via several rotating rolls 13. Some of the rolls 13 are placed in such a way that the path of the metal loop 12 is turned to the opposite direction. Some of the rolls are only used as rolls to support the metal loop 12.
  • the impingement hoods 15a and 15b are arranged almost one after the other in the direction of travel of the chemical pulp web W. If desired, the impingement hoods 15a and 15b can also be arranged to each other, if this is allowed by the placement of the other components of the first dryer.
  • Figure 6 shows an embodiment in which the first dryer 3 comprises three heated metal loops 12, 16 and 17. At least one impingement hood is arranged in connection with each metal loop to blow hot air towards the chemical pulp web running on the metal loop. Each metal loop is also heated by at least one heater 14 fitted outside the metal loops. An alternative arrangement, that is, the placement of the heater 14 inside the metal loop 12, is shown by broken lines in the figure.
  • the metal loops are arranged in relation to each other in such a way that the chemical pulp web W is supported by one of the metal loops all the time when it runs through the first dryer.
  • the first element in the direction of travel of the chemical pulp web W is the first metal loop 16, and an impingement hood 15c is arranged close to its outer surface 16, spaced from it.
  • the first metal loop 16 is in nip contact with the second metal loop 12.
  • Two impingement hoods 15a and 15b are arranged close to the outer surface of the second metal loop 12 to blow hot air towards the chemical pulp web W running on the outer surface 12a of the metal loop 12.
  • the second metal loop 12 with its impingement hood and heater is substantially similar to the example shown in Fig. 5.
  • the second metal loop 12 is also in nip contact with the third metal loop 17.
  • An impingement hood 15d is arranged close to the outer surface 17a of the third metal loop 17.
  • the metal loops 12, 16 and 17 are heated by heaters 14 arranged inside the loops.
  • the chemical pulp web W coming from the press 2 is guided onto the outer surface 16a of the first metal loop 16 where it runs in contact with the loop. Supported by the loop, the chemical pulp web runs through the range of the impingement hood 15c and further via the nip N1 formed by the first and second metal loops onto the outer surface 12a of the second metal loop 12.
  • the chemical pulp web W runs with the movement of the loop 12 first through the range covered by the impingement hood 15a and then through the range covered by the impingement hood 15b. After this, the web runs through the nip N2 formed by the second and third metal loops onto the outer surface 17a of the third metal loop 17.
  • the web runs in contact with the third metal loop 17 before and after the range of the impingement hood 15d, as well as through the range.
  • the chemical pulp web is in contact with the hot thermal surface, i.e. the surface of the metal loop, its free shrinking is prevented and it dries under tension.
  • the chemical pulp web is dried in these dryers on two sides: one surface S1 of the chemical pulp web W is dried when it is in contact with the hot surface of the metal loop or metal loops, and the other surface S2 of the web is dried by the effect of hot air blown by the impingement hood / impingement hoods.
  • the position and length of the metal loop 12 as well as the number of rolls supporting and guiding the same may vary to a great extent.
  • the position of the metal loop in relation to the horizontal plane is determined on the basis of the size and placement of the components of the first dryer and the space available in the pulp mill. In the example of Fig. 5, the metal loop is arranged in the vertical position, which takes little space in a pulp mill.
  • the first dryer 3 shown in Figs. 4 to 6 naturally also comprises a number of other parts and components which are not shown in the figure for the sake of clarity.
  • the second dryer may also be another dryer than a conventional pulp dryer equipped with blowing boxes.
  • Figure 7 shows an embodiment in which the second dryer 4 is a Yankee dryer.
  • the first dryer 3 is also a Yankee dryer. Both of the dryers are substantially similar to the Yankee dryer described in connection with Fig. 2.
  • the first dryer 3 used may be any of the dryer types described above, for example a dryer that contains a heated metal loop.
  • the second dryer comprises a drying cylinder heated with steam, i.e. a Yankee cylinder 5D, and an impingement hood 6D installed close to its outer surface. Part of the circumference of the Yankee cylinder 5D is covered by the halves 6aD and 6bD of the hood 6D .
  • a clearance is provided between the impingement hood 6D and the cyihder 5D ⁇ nd the impingement hood 6D is arranged to blow hot air towards the outer surface 5aD of the Yankee cylinder.
  • the web is guided onto the surface 5aD of the Yankee cylinder 5D and kept there for at least the time when the web runs on the Yankee cylinder 5D in the area covered by the impingement hood 6D .
  • the invention is not intended to be limited to the embodiments presented as examples above, but the invention is intended to be applied widely within the scope of the inventive idea as defined in the appended claims.
  • the invention can also be applied in such a way that the second dryer is a cylinder dryer consisting of several cylinders.
  • the first dryer may be any of the alternatives shown above as the first dryer.

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  • Drying Of Solid Materials (AREA)
  • Paper (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)

Abstract

L'invention porte sur un procédé et appareil pour sécher une nappe de pâte chimique, la nappe de pâte chimique (W) étant séchée au moyen d'au moins un séchoir (3, 4), dans lequel les deux surfaces (S1, S2) de la nappe de pâte chimique (W) sont soumises à la chaleur. Dans le séchoir (3), au moins une surface (S1) de la nappe de pâte chimique (W) est mise en contact avec au moins une surface thermique (5a, 10a, 12a, 16a, 17a).
PCT/EP2008/055906 2007-05-25 2008-05-14 Procédé et appareil pour sécher une nappe de pâte chimique WO2008145519A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20075373 2007-05-25
FI20075373A FI20075373L (fi) 2007-05-25 2007-05-25 Menetelmä ja laitteisto sellurainan kuivaamiseksi

Publications (1)

Publication Number Publication Date
WO2008145519A1 true WO2008145519A1 (fr) 2008-12-04

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012140323A1 (fr) * 2011-04-14 2012-10-18 Metso Paper, Inc. Procédé permettant d'observer des incidents dans une zone de partie d'extrémité d'un séchoir à pulpe, séchoir à pulpe et utilisation d'un élément de surveillance
WO2014152960A1 (fr) * 2013-03-14 2014-09-25 Auburn University Cellulose fonctionnalisée permettant d'améliorer l'essorage et l'efficacité énergétique

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB430909A (en) * 1933-12-22 1935-06-24 William Wycliffe Spooner Improvements in drying or conditioning apparatus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB430909A (en) * 1933-12-22 1935-06-24 William Wycliffe Spooner Improvements in drying or conditioning apparatus

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
STIG SALKVIST: "torning av massa del 2", 1997, OLOV F BORG - SKOGSINDUSTRINS UTBILDNING, MARKARYD (SE), ISBN: 91-7322-198-8, XP002501824 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012140323A1 (fr) * 2011-04-14 2012-10-18 Metso Paper, Inc. Procédé permettant d'observer des incidents dans une zone de partie d'extrémité d'un séchoir à pulpe, séchoir à pulpe et utilisation d'un élément de surveillance
WO2014152960A1 (fr) * 2013-03-14 2014-09-25 Auburn University Cellulose fonctionnalisée permettant d'améliorer l'essorage et l'efficacité énergétique

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FI20075373A0 (fi) 2007-05-25
FI20075373L (fi) 2008-11-26

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