JP2005320674A - Drying section of machine for producing fiber web - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drying section of a machine for producing fiber web. <P>SOLUTION: The drying section of a machine for producing paper, paperboard, tissue paper or other fiber web(2) has at least one suction roll(1), being such that fiber web(2) can be guided relative to the shell of the suction roll(1) from above downward around the suction roll(1), can be guided around the underside area of the shell of the 1st suction roll(1), and can be guided from below upward again so as to be set apart from the shell of the 1st suction roll(1), and a 1st impingement dryer(6) is set against the shell of the suction roll(1), wherein the 1st impingement dryer(6) is set substantially against only a one-fourth lower part of the exit side of the 1st suction roll(1). <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention is a drying section of a machine for producing paper, paperboard, thin paper or other fiber web, having at least one first suction roll around which the fiber web is placed in the shell of the first suction roll From the top to the bottom, can be led around the lower area of the shell of the first suction roll, and again led from the bottom to the top away from the shell of the first suction roll And a first impingement dryer that is installed facing the shell of the suction roll.

  Alternatively, the present invention is a drying section of a machine for producing paper, paperboard, thin paper or other fibrous web, having at least one first suction roll around which the first is placed. It can be guided from the bottom to the top with respect to the shell of the suction roll, can be guided around the upper area of the shell of the first suction roll, and again from the top to the bottom so as to be separated from the shell of the first suction roll It relates to a drying section in which a first impingement dryer is installed facing the shell area of the suction roll.

  US Pat. No. 6,057,059 includes at least one impingement dryer, whereby a hot web or hot steam impingement flow impinges on the material web on at least one side, a dryer section of a machine for producing a material web, in particular a paper or board web Is disclosed.

  US Pat. No. 6,057,089 discloses a drying cylinder for drying a material web, which is used in particular for guiding and holding a paper web on which dry gas acts. The drying cylinder has a shell, and the material web is guided throughout it during operation of the cylinder and partially wraps around the cylinder during the process. The shell has a gas passage opening. Means for conveying gas through the cylinder shell is also provided. Inside the cylinder shell is a second hermetic shell that forms an annular chamber with the outer cylinder shell. The annular chamber is hermetically sealed against the inside of the inner shell.

  (Patent Document 3) discloses a dryer group in a drying section of a machine for producing a material web. The dryer group includes a number of cylinders that are alternately heated and cooled as seen in the direction of travel of the material web, around which the material web is meandered along with the porous transfer belt and metal belt. In this case, the material web is arranged between the transfer belt and the metal belt. The metal belt or transfer belt is highly pre-stretched and the cylinder is assigned an additional heating device which acts on the circumferential region where the material web rests with the transfer belt and the metal belt.

German Patent Application Publication No. 19841768A1 German Patent Application Publication No. 10047369A1 German Patent Application Publication No. 191953030A1

  The object of the present invention is to improve the drying section of the machine that produces the fibrous web so as to achieve good drying performance.

  According to the invention, the purpose of the opening part of the opening type is that the first impingement dryer is the only one facing the suction roll and substantially lower or upper four minutes on the outlet side of the first suction roll. This is achieved by covering the upper area of the suction roll in an alternative embodiment, which is placed opposite only one of the two.

  According to the present invention, good winding around the roll is achieved by the hood-like impingement dryer. The arrangement of the impingement dryer is selected so that the impingement dryer and also the suction roll can be easily kept clean.

  With this arrangement, it is not necessary to guide the relatively wet fibrous web onto the smooth contact surface to achieve proper heat transfer. As a result of eliminating the smooth contact surface at the beginning of drying, the risk of web breakage and web edge overstretching is virtually eliminated. For this reason, a high drying rate is also possible according to the invention, which means that the overall length of the drying section is shortened accordingly.

  Suction rolls covered by impingement dryers have a high drying efficiency, which themselves take up space for three drying cylinders arranged in sequence, but omit eight drying cylinders, for example, resulting in overall space savings Thus, the length of the paper machine is shortened.

  The drying performance at the start of the drying operation is limited by the effect on the paper quality and is not limited by the web guidance of the wet paper web. Furthermore, by using an impingement dryer that can be controlled more freely and more quickly, the paper quality can be better influenced than a conventional drying cylinder. For example, even at the start of the drying phase with specific heating and drying, it is even possible to modify the moisture profile in particular in the transverse direction. Since no pressing on the hot surface is required, the prevention of the respective lateral shrinkage can also be controlled or better changed.

  It is preferred to guide the fibrous web onto an open, so-called non-smooth support surface, with the sides facing the sides that are each acted upon by impingement flow. Since this eliminates the situation where the relatively wet fibrous web still remains attached to the support surface, the risk of web breakage and overstretching of the side edges is virtually eliminated.

  A further advantage of the present invention is, for example, if the paper web breaks, if there is a hole in the web or during a transport operation, the paper web is blown away without being accurately placed on the fabric of the suction roll located below. The piece of paper can drop into the device that collects debris rather than onto the impingement dryer that is fitted under the inlet side as in the conventional case, so that it is on the impingement dryer located at the bottom. Means that only a few debris accumulate.

  In an apparatus including two suction rolls arranged in order instead of three as in the prior art, the fact that only two impingement dryers are mated saves investment costs for one impingement dryer. And at the same time the performance per impingement dryer increases.

  Advantageous results of the invention will become apparent from the dependent claims, the description and the drawings.

  The at least one impingement dryer preferably comprises a bleed system used for co-evaporation. Therefore, switching between heating and evaporation is not necessary. By eliminating the additional evaporation region, the overall progression length is further reduced.

  One preferred embodiment of the present invention is characterized in that the impingement dryers are both placed opposite each other and the fibrous web is guided onto at least two suction rolls arranged in sequence. If at least one second suction roll is arranged after the at least one first suction roll in the web travel direction of the fiber web, the fiber web is guided from top to bottom with respect to the shell of the second suction roll. And guided around the lower region of the shell of the second suction roll, and again guided from the lower part to the upper part so as to be separated from the shell of the second suction roll, and the second impingement dryer is moved to the lower part of the suction roll. Located opposite the area.

  A particularly large suction roll, for example with a diameter of at least 3 m, ensures reliable and accurate guidance with a constant curvature. Since the suction roll need not be designed as a pressure vessel, it can be relatively large and provide a correspondingly large dry area. Any vacuum required for the suction roll is generated by a fixed suction box installed to seal against the suction roll.

  According to the present invention, at least one of the first and second suction rolls can be provided so that the cloth is wound around the periphery. Both the first and second suction rolls are assigned their own dry cloth.

  If the drying cloth wrapped around the second suction roll is heated by steam and is wound around at least three drying cylinders in sequence, at least a single drying cylinder belonging to the subsequent single row drying section It is also advantageous.

  It is advantageous for the impingement dryer to cover at least one suction roll over an angle of at least 80 ° but not more than 180 °, in particular over an angle between 90 ° and 130 °.

  Any impingement dryer can be moved and returned back away from the first suction roll and the second suction roll, respectively, by translation and / or rotational movement.

  Alternatively, the impingement dryer can also move twice in different directions. This movement is preferably performed in two stages depending on the geometric configuration, but one-stage movement is also conceivable. Further, in the case of cloth change, the impingement dryer is rotated so as to move up or away from the suction roll.

  Advantageously, each impingement dryer has an integrated hot air or hot steam system.

  It is also advantageous if the impingement dryers each have a built-in burner, in particular associated with a recirculation air fan and / or a bypass valve. The burner produces a temperature in the range of 300 ° to 500 °.

  An impingement dryer also designed in an impingement hood in an advantageous refinement may comprise modules having a width of 1.5 m to 4 m, in particular a width of 2 m to 3 m, arranged laterally to each other across its width.

  All modules can be operated in the same and together. However, they can all be operated individually at different temperatures, at different wind speeds and at different moisture contents, so that the profile is imparted to the fiber web in a direction transverse to the flow direction depending on the characteristics of the selected module. .

  The impingement dryers together have a length such that the spray length acting on the circumference of the suction roll is at least 5 m. A spray length of between 8.00 m and 10.50 m is particularly preferred. According to the present invention, after the press section, an impingement dryer is designed to follow the press section so that the dryness of the fiber web achieves an increase of 2-5%.

  Advantageously, the first dryer region having a single row arrangement of drying cylinders is arranged after the arrangement of the suction roll or impingement dryer with the impingement dryer and the impingement dryer. In this dryer region, at least two stabilizer boxes are arranged above the suction roll that deflects the fiber web between the drying cylinders. Each stabilizer box has a separation zone away from the stabilization zone in the upper area of the stabilizer box where the fiber web is separated from the circumferential surface of the drying cylinder, and a separation where the fiber web is directed forward in the direction of the subsequent suction roll With a stabilization or retention zone following the zone. Use stronger suction pressure in the separation zone than in the holding zone. The suction pressure is at least 700 Pa and preferably exceeds 1000 Pa.

  In a particular refinement of the invention, a unit for applying the medium, in particular a coating unit, is arranged behind the first dryer area.

  In a more specific refinement, a second dryer region with a single or two-row arrangement of drying cylinders is arranged behind the first dryer region. The second dryer region can be equipped with some single row drying cylinders and some double row drying cylinders.

  A single suction roll with a single impingement dryer can be located in the single row dryer area, the impingement dryer being at least substantially in the upper or lower quarter on the outlet side of the single suction roll. Has been placed.

  It is also advantageous for the drying section to include at least two stabilizer boxes arranged in the single row dryer area and to provide a suction action on the fiber web.

  The invention also relates to a machine for producing a fibrous web, according to the invention, the machine being provided to include a flow box having a feeding device that is regulated in a dilution water zone.

  This is advantageous because a twin wire former (gap former) having two wires in the wire portion can be used.

  In an advantageous improvement of the machine, there is a press part having a single suction nip formed by a press roll together with a shoe press roll. In another improvement of the press section, two press nips arranged in sequence are provided, both of which the press roll interacts with the shoe press roll. In this case, the first press nip can be formed by two press rolls that interact with each other. In the case where the press roll forms a press nip together with the shoe press roll, the press roll is preferably disposed at the lower part. It is preferable to configure at least one of the press rolls as a suction press roll.

  It is advantageous if the pressing part comprises at least one conveyor belt.

  In a further advantageous embodiment of the invention, the machine comprises a coating unit for film coating on both sides of the fiber web.

  Similarly, in order to calender the fibrous web, it is advantageous to arrange at least one calender with a pair of rolls after the drying section. Two calendars are preferred, in particular a calendar with a pair of rolls arranged in sequence.

  In a preferred refinement of the invention, the machine for producing the fiber web has felt and / or conveyor belts in the press section, whereby the fiber web is supported continuously.

  The present invention also relates to a drying section of a machine for producing paper, paperboard, thin paper or other fibrous web, in particular in connection with one of the improvements listed above, at least one second arranged in the drying section. 1 suction roll, around which the fibrous web is guided from the top to the bottom with respect to the shell of the first suction roll, led around the lower region of the shell of the first suction roll, and the first The present invention relates to a method for operating a drying section in which a first impingement dryer is installed to face a lower region of the shell of the suction roll by guiding again from the lower part to the upper part so as to be separated from the shell of the suction roll. Equally, the fibrous web can be led from the lower part to the upper part around the first suction roll and then again from the upper part to the lower part so as to move further upward on its upper region.

  According to the invention, this method is characterized in that the fiber web has a degree of dryness of less than 75% as it proceeds into the drying section.

  Similarly, the present invention is a drying section of a machine for producing paper, paperboard, thin paper or other fibrous web, having at least one first suction roll arranged after the pressing section, around which the fibers The web is guided from the bottom to the top or from the top to the bottom with respect to the shell of the first suction roll, led around the upper or lower area of the shell of the first suction roll, and from the shell of the first suction roll The method relates to a method of operating a drying section in which the first impingement dryer is installed facing the upper or lower region of the shell of the first suction roll, again leading from the top to the bottom or from the bottom to the top so as to leave. . According to the invention, this method is characterized in that the fiber web has a dryness of less than 56%, preferably less than 53%, as it proceeds into the first impingement dryer.

  In one method according to the invention, the machine at a speed of more than 800 m / min when producing a fine paper web, in particular at a speed of more than 1100 m / min, and at a speed of more than 1200 m / min when producing a sheet of paper, It is particularly advantageous to operate at speeds exceeding 1600 m / min.

  It is advantageous to rotate the impingement dryer away from and / or away from the suction roll during transport of the fiber web, during cloth changes or maintenance work.

  In order to prevent the rear or part of the rear from falling onto an impingement dryer that has already generated hot air in case of breakage during transport, at least the lower impingement dryer should be Apply an additional cover. After the transport operation is completed, the covers are retracted from the impingement dryer so that their total heat output acts on the fiber web.

  During the conveyance or maintenance, that is, other than the production operation of the fiber web, the impingement dryer, that is, its air outlet surface is moved by a distance of at least 200 mm, preferably at least 500 mm, with respect to the circumferential surface of the suction roll.

  In the method of removing the impingement dryer, it is preferable that the impingement dryer is lifted away from the suction roll by two-step movement, translation movement, and rotation movement performed separately in order. However, in one embodiment of the moving device, the order of translational movement and rotational movement can be changed.

  In a further method according to the invention, the first impingement dryer on the at least one first suction roll is moved so that the rest of the fiber web or the dirt on the upper side of the impingement dryer slides down or falls down. The suction roll can be retracted, for example, into a shaft arranged on the side of the impingement dryer.

  After the maintenance work is completed, after the transport operation and the cloth change, the impingement dryer is raised again to an operating distance of at least 20 to 60 mm, particularly 30 to 50 mm with respect to the circumferential surface of the suction roll.

  Particularly in the production of high-quality surface-treated paper webs, for example copier paper, it is advantageous if the fiber web is guided and supported over the entire length of the press by means of felts and / or conveying belts. As a result, the fibrous web is conveyed to the drying section without being in direct contact with the smooth roll surface and without free drawing.

  In this case, it is advantageous if the fibrous web is supported on one side by felt or on one side by felt and on the other side by a conveyor belt.

  It is also advantageous if each lower suction roll is evacuated.

  The present invention allows for an operating speed of 1100 m / min when there are two or more press nips. If there is only a single press nip, preferably a nip formed between the shoe press roll and the press roll, the operating speed is at least 800 m / min.

  In the text that follows, the invention will be described in an exemplary embodiment and with the aid of the drawings.

  At the entrance of the drying section, a suction roll 1 (FIG. 1) is placed after the press section of the machine that produces the fiber web 2. The fiber web 2 is guided down on the first deflection roll 3 together with the conveyor belt or dry cloth around the shell of the suction roll 1 and further up on the further deflection roll 4. Between the deflection rolls 3 and 4, a stabilizer 5 is disposed above the suction roll 1, and a vacuum necessary for the suction roll 1 to attract the fiber web 2 onto its circumferential surface by suction through a dry cloth is supplied. .

  Also, disposed below the suction roll 1 is an impingement dryer 6 that covers the lower quarter of the outlet side of the suction roll 1 as a web traveling direction, and dries the fiber web 2. To do.

  In the machine for manufacturing the fiber web 2, two suction rolls 7 and 8 (FIG. 2), which are arranged in order and in which both impingement dryers 9 and 10 are opposed to each other, are usually used.

  The fiber web 11 coming from the press part is supported by a felt 12. The fiber web 11 is guided away from the felt 12 by a roll 13 having a suction zone, and a dry cloth 14 is guided on the roll 13 and placed on the shell of the roll 13. The dry cloth 14 is guided around the roll 13 together with the fiber web 11 and then separated upward.

  The fiber web 11 is conveyed from the roll 13 to the suction roll 7, and at the same time, the dry cloth 15 is guided together with the fiber web 11 around the suction roll 7 from the lower side between the fiber web 11 and the shell of the suction roll 7. Therefore, the fiber web 11 is sandwiched between the dry cloths 14 and 15 and conveyed to the circumferential surface of the suction roll 7. The dry cloth 15 is returned downward again between the rolls 16 and 17. Thus, the dry cloth 15 is wound around a large area of the circumference of the suction roll 7.

  Furthermore, a suction box 18 in which a vacuum necessary for the suction roll 7 is generated is arranged below the suction roll 7. Arranged on the upper side of the suction roll 7 is an impingement dryer 9 which covers the area of about one third of the circumferential surface of the suction roll 7 and dries the fiber web 11.

  By suction, the fiber web 11 is attracted from the suction roll 7 onto the dry cloth 19 and in the direction of the second suction roll 8, and the fiber web 11 is guided around the suction roll 8, so that the dry cloth 19 Place on the circumference. The vacuum of the suction roll 8 is generated in the suction box 20.

  On the suction roll 8, in order to further dry the fiber web 11, an impingement dryer 10 is arranged in the lower quarter of the web exit side on the circumferential surface of the suction roll 8 over an angle of 120 °, for example. ing.

  The drying cylinder 21 in the single row dryer region where the drying of the fiber web 11 continues is directly connected to the suction roll 8. The drying cloth 19 is guided forward on the drying cylinder. The drying cloth 19 can also travel forward on two further drying cylinders following the direction of web travel.

  In the case of cleaning and maintenance work and when the fiber web 11 is transported (FIG. 3), at least the impingement dryer 10 can be further removed from the circumferential surface of the suction roll 8. For this reason, the impingement dryer 10 first moves diagonally downward in the direction of arrow A by linear movement, and then moves vertically downward in the direction of arrow B by further linear movement.

  In an alternative improvement of the moving mechanism, the impingement dryer 10 (FIG. 4) also moves diagonally downward away from the circumferential surface of the suction roll 8 initially in a linear movement. Thereafter, the impingement dryer 10 rotates about the rotation axis C so as to leave in the direction of the arrow D by rotational movement.

  After the maintenance work is completed or the transport operation is completed, the impingement dryer 10 is returned again in the direction of the circumferential surface of the suction roll 8 in the reverse order of movement, so that the impingement dryer is again at least 200 mm from the suction roll 8. It becomes the distance.

Fig. 5 shows a suction roll in the drying section associated with an impingement dryer. Figure 2 shows two suction rolls arranged in the order associated with two impingement dryers. Fig. 3 shows a suction roll according to Fig. 2 in which an impingement dryer installed opposite the second suction roll can be removed from the second suction roll by two linear movements. Fig. 3 shows a suction roll according to Fig. 2 in which an impingement dryer placed opposite the second suction roll can be removed from the second suction roll by linear movement and rotational movement.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 1st suction roll 2 Fiber web 3 Deflection roll 4 Deflection roll 5 Stabilizer 6 1st impingement dryer 7 1st suction roll 8 2nd suction roll 9 1st impingement dryer 10 2nd impingement dryer DESCRIPTION OF SYMBOLS 11 Fiber web 12 Felt 13 Roll 14 Dry cloth 15 Dry cloth 16 Roll 17 Roll 18 Suction box 19 Dry cloth 20 Suction box 21 Drying cylinder

Claims (38)

A drying section of a machine for producing paper, paperboard, thin paper or other fibrous web (2), comprising at least one first suction roll (1), around which said fibrous web (2) is said Leading from the top to the bottom or from the bottom to the top with respect to the shell of the first suction roll (1) and leading around the lower or upper region of the shell of the first suction roll (1); And can be guided again from the lower part to the upper part or from the upper part to the lower part away from the shell of the first suction roll (1), and the first impingement dryer (6) is connected to the first suction roll ( 1) a drying section installed opposite the shell of 1)
The first impingement dryer (6) is installed as the only one facing the suction roll (1), and is substantially lower or upper on the outlet side of the first suction roll (1). A drying section characterized by being arranged only in a quarter. A drying section of a machine for producing paper, paperboard, thin paper or other fiber web (11), comprising at least one first suction roll (7), around which said fiber web (11) is said The shell of the first suction roll (7) can be guided from the lower part to the upper part, can be guided around the upper area of the shell of the first suction roll (7), and further the first suction roll (7) The first impingement dryer (9) can be guided again from the upper part to the lower part so as to be separated from the shell of the roll (7), and is a drying unit installed facing the shell of the suction roll (7). And
The drying section, characterized in that the first impingement dryer (9) substantially covers the upper region of the first suction roll (7).   At least one second suction roll (8) is arranged before or after the at least one first suction roll (7) in the web traveling direction of the fiber web (11), around which the fiber web is located. (11) can be guided from the top to the bottom with respect to the shell of the second suction roll (8), can be led around the lower region of the shell of the second suction roll (8), Furthermore, it can be guided again from the bottom to the top away from the shell of the second suction roll (8), and the second impingement dryer (10) is the only one in the second suction roll (8). 3. The drying unit according to claim 2, wherein the drying unit is disposed oppositely and is disposed substantially only in the lower quarter of the outlet side of the second suction roll (8).   Each of the at least one first and second suction rolls (1; 7, 8) is adapted to have fibers wrapped around them, and the first and second suction rolls (1; 7). , 8) are all assigned their own dry cloth (15, 19).   The drying cloth (19) wrapped around the second suction roll (8) is then at least one single drying cylinder (21) heated by steam, but at most three drying cylinders ( 21. The drying unit according to claim 4, wherein the drying unit is wound around 21).   The impingement dryer (6; 9, 10) causes the at least one suction roll (1; 7, 8) to have an angle of at least 80 ° but not more than 180 °, in particular between 90 ° and 130 °. The drying unit according to claim 1, wherein the drying unit is covered.   The first and second impingement dryers (9, 10) can be removed from the first suction roll (7) and the second suction roll (8), respectively, by translation and / or rotation. The drying unit according to any one of claims 2 to 6, wherein the drying unit is installed as described above.   The drying section according to any one of claims 1 to 7, characterized in that all impingement dryers (6; 9, 10) have an integrated hot air or hot steam system.   9. The impingement dryer (6; 9, 10) all having a built-in burner, particularly in conjunction with a recirculation air fan and / or a bypass valve. The drying section described.   The impingement dryer (6; 9, 10) comprises a module having a width of 1.5m to 4m, in particular a width of 2m to 3m, arranged laterally to each other across its width. Item 10. The drying unit according to Item 8 or 9.   The drying unit according to claim 10, wherein the temperature, wind speed and / or moisture content of the module can be individually set.   The impingement dryer (9, 10) has a spray length acting on the circumference of the suction roll (7, 8) of at least 5m, in particular 8.00m to 10.50m in total. The drying part as described in any one of 2-11.   A first dryer region having a single row arrangement of drying cylinders is arranged, the first suction roll (1) and the impingement dryer (6) are arranged opposite to each other, and has a single row arrangement of drying cylinders. The drying section according to claim 1, wherein the first single row dryer region is disposed behind them.   A first single row dryer region having a row of drying cylinders is provided for the first and second suction rolls (7, 8) and the impingement dryers (9, 10) installed opposite them. It arrange | positions back, The drying part as described in any one of Claims 3-12 characterized by the above-mentioned.   15. The drying unit according to claim 13, wherein a unit for applying a medium, in particular a coating unit, is arranged behind the first dryer region.   A second dryer region having two rows of drying cylinders is disposed behind the first single row dryer region disposed after the suction roll (1) or the suction roll (7, 8). The drying unit according to any one of claims 13 to 15, wherein the drying unit is provided.   The drying section includes at least two stabilizer boxes disposed in the single row dryer region, and is separated from a stabilization zone in the upper region of the stabilizer box for producing a suction action on the fibrous web (2, 11). The drying part as described in any one of Claims 1-16 characterized by the above-mentioned.   18. Drying section according to claim 17, characterized in that the stabilizer box in the separation zone exerts a vacuum on the fibrous web of at least 700 Pa, in particular exceeding 1000 Pa.   A machine for producing a fibrous web (2, 11) having a drying section according to any one of the preceding claims, comprising a flow box with a feeding device adjusted in the dilution water zone. A machine characterized by that.   A machine for producing a fibrous web (2, 11) having a drying part according to any one of the preceding claims, comprising a wire part having a twin wire former (gap former). 20. A machine according to claim 19, characterized in particular.   A machine for producing a fibrous web (2, 11) having a drying part according to any one of the preceding claims, comprising a single press nip comprising a press roll and a shoe press roll. 21. Machine according to claim 19 or 20, characterized in that it comprises a part.   19. A machine for producing a fibrous web (2, 11) having a drying section according to any one of the preceding claims, each comprising at least two presses arranged in sequence, each comprising two rolls 21. A machine according to claim 19 or 20, characterized in that it has a press part with a nip.   At least one of the second press nip and / or the subsequent press nip is formed by a press roll and a shoe press roll, in particular the lower press roll and the upper shoe press roll. The machine according to claim 22.   24. A machine according to any one of claims 21 to 23, wherein the at least one press roll is configured as a suction press roll.   25. A machine according to any one of claims 21 to 24, wherein the pressing part comprises at least one conveyor belt.   A machine for producing a fibrous web (2, 11) comprising a drying section according to any one of the preceding claims, wherein a coating unit for film coating on both sides of the fibrous web (2, 11). 26. Machine according to any one of claims 19 to 25, characterized in that it comprises.   A machine for producing a fibrous web (2, 11) comprising a drying part according to any one of the preceding claims, wherein at least one calender having a pair of rolls, preferably arranged in particular order. 27. Machine according to any one of claims 19 to 26, characterized in that it comprises two other calendars.   It is a machine which manufactures the fiber web (2, 11) which has a drying part as described in any one of Claims 1-18, Comprising: The said fiber web (2, 11) is the said press over the full length of the said press part. 28. Machine according to any one of claims 19 to 27, characterized in that there is a felt and / or conveyor belt guided and supported over the entire length of the part.   The at least one first suction roll (1) arranged in a drying section of a machine for producing paper, paperboard, thin paper or other fibrous web (2) according to claim 1, in particular. And surrounding the fiber web (2) from the lower part to the upper part or from the upper part to the lower part with respect to the shell of the suction roll (1), the upper or lower region of the shell of the suction roll (1) To the periphery of the suction roll (1), and again from the top to the bottom or from the bottom to the top so that the impingement dryer (6) is above or below the shell of the suction roll (1). A method of operating a drying section that is placed opposite an area, wherein the fibrous web (2) has a dryness of less than 75% when traveling into the impingement dryer (6). Wherein.   3. At least one first suction roll (7) arranged after the press section, in particular a drying section of a machine for producing paper, paperboard, thin paper or other fibrous web (11) according to claim 2. The fiber web (11) is guided to the shell of the first suction roll (7) from the lower part to the upper part or from the upper part to the lower part around the shell of the first suction roll (7). Around the upper or lower area of the first suction roll (7), and again from the top to the bottom or from the bottom to the top, away from the shell of the first suction roll (7), the first impingement dryer (9) A method of operating a drying section that is installed facing the upper or lower region of the shell of the first suction roll (7), when it proceeds into the first impingement dryer (9) The fiber web (7) The method is less than 56%, preferably characterized by having a less than 53% dryness.   3. At least one first suction roll (7) arranged after the press section, in particular a drying section of a machine for producing paper, paperboard, thin paper or other fibrous web (11) according to claim 2. The fiber web (11) is guided to the shell of the first suction roll (7) from the lower part to the upper part or from the upper part to the lower part around the shell of the first suction roll (7). Around the upper or lower area of the first suction roll (7), and again from the top to the bottom or from the bottom to the top, away from the shell of the first suction roll (7), the first impingement dryer (9) A method for operating a drying section installed opposite the lower or upper region of the shell of the first suction roll (7), wherein the machine exceeds 800 m / min when producing a fine paper web Especially at speed 100 m / min at more than speed, further making the exposed at speeds in excess of 1200 m / min, wherein the operating at speeds especially above 1600 m / min.   The at least one first suction roll (1) arranged in a drying section of a machine for producing paper, paperboard, thin paper or other fibrous web (2) according to claim 1, in particular. The fiber web (2) is guided to the shell of the first suction roll (1) from the lower part to the upper part or from the upper part to the lower part around the shell of the first suction roll (1). Around the upper or lower area of the first suction roll (1) from the top to the bottom or from the bottom to the top again away from the shell of the first suction roll (1), the first impingement dryer 1) A method of operating a drying section that is installed facing the upper or lower region of the shell, wherein the impingement drum is moved during the transfer of the fiber web (2), during the cloth change or during the maintenance work. At least 200 mm, preferably at least 500 mm, set between the circumferential surface of the at least one suction roll (1) and the air outlet surface of the impingement dryer (6) facing it And a distance of said at least one suction roll (1).   The first and second suction rolls (7, 7) arranged after the press section, in particular in a drying section of a machine for producing paper, paperboard, thin paper or other fiber web (11) according to claim 2. 8) around which the fibrous web (11) is guided from the bottom to the top or from the top to the bottom with respect to the shells of the first and second suction rolls (7, 8), respectively. From the top again, leading around the upper or lower region of the shell of the first and second suction rolls (7, 8) and further away from the shell of the first and second suction rolls (7, 8), respectively. At least one first impingement dryer (9) is installed facing the upper or lower region of the shell of the first suction roll (7) and leads to the lower part or from the lower part to the upper part, and at least In a method in which one second impingement dryer (10) operates a drying unit that is installed facing the upper or lower region of the shell of the first and second suction rolls (7, 8). And at least the impingement dryer installed facing the lower region of the first or second suction roll (7, 8) during conveyance of the fiber web (2), during cloth change or maintenance work. (10) is set at least 200 mm, preferably at least 500 mm, between the circumferential surface of the suction roll (7, 8) and the air outlet surface of the impingement dryer (9, 10) facing it. A distance between the suction rolls (7, 8) and being rotated away from and / or away from the suction roll (7, 8).   The at least one impingement dryer (6; 9, 10) is moved in two stages, translated and rotated, or two translational movements in different directions, which are performed separately in sequence, the suction roll (1; 7, 8) 34. A method according to claim 32 or 33, wherein the method is lifted off.   The impingement dryer (6, 10) on the lower side of the suction roll (1; 8) is not covered by the rest of the fiber web (2, 11) or on the upper side of the impingement dryer (6, 10). 35. Method according to claim 34, characterized in that the suction roll (1; 8) is retracted to the extent that it slides.   19. A drying section of a machine for producing paper, paperboard, thin paper or other fiber web (2, 11) according to any one of the preceding claims, characterized in that it comprises at least one first suction roll ( 1; 7) around which the fibrous web (2, 11) is guided from the bottom to the top or from the top to the bottom with respect to the shell of the first suction roll (1; 7), Led around the upper or lower region of the shell of the suction roll (1; 7) and again from top to bottom or from bottom to top away from the shell of the first suction roll (1; 7) The first impingement dryer (6; 9) is a method for operating a drying unit installed facing the lower or upper region of the shell of the suction roll (1; 7), and includes a conveying operation, Cloth change or maintenance work was performed The air outlet surfaces of the first impingement dryer (6; 9) and the second impingement dryer (10) with respect to the circumferential surface of the suction roll (1; 7), in particular 20 to 60 mm, Raising into a working position at a distance of 30-50 mm.   A method for producing a fiber web (2, 11) from a fiber suspension in a machine having a wire part, a press part and a drying part according to any one of the preceding claims, wherein said fiber web. The method (2, 11) is guided and supported over the entire length of the press part by felt and / or a conveyor belt.   In the press section, the fiber web (2, 11) is supported on both sides by the felt or by at least one felt and at least one transport belt, and between a pair of press rolls or between a press roll and a shoe press roll. 38. The method of claim 37, wherein the method is conducted through at least one press nip formed.

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