EP3339507B1 - Verfahren zum betrieb eines heizgruppenteilsystems und heizgruppenteilsystem - Google Patents
Verfahren zum betrieb eines heizgruppenteilsystems und heizgruppenteilsystem Download PDFInfo
- Publication number
- EP3339507B1 EP3339507B1 EP17198197.0A EP17198197A EP3339507B1 EP 3339507 B1 EP3339507 B1 EP 3339507B1 EP 17198197 A EP17198197 A EP 17198197A EP 3339507 B1 EP3339507 B1 EP 3339507B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heating
- steam
- heating group
- group
- separator
- Prior art date
- Legal status (The legal status 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 status listed.)
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Links
- 238000010438 heat treatment Methods 0.000 title claims description 369
- 238000000034 method Methods 0.000 title claims description 12
- 238000001035 drying Methods 0.000 claims description 47
- 230000002265 prevention Effects 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 239000000123 paper Substances 0.000 claims 2
- 238000004519 manufacturing process Methods 0.000 description 7
- 239000003990 capacitor Substances 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 1
Images
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
-
- 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
- D21F5/022—Heating the cylinders
- D21F5/028—Heating the cylinders using steam
-
- 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
- D21F5/20—Waste heat recovery
Definitions
- the invention relates to a method for operating a Walker disciplineteilsystems a machine for producing or treating a fibrous web, in particular a paper or board web, said Bankmanteilsystem a first heating group and a last heating group and at least one further heating group, each having at least one having a vapor pressure Heating steam heated device, in particular a drying cylinder, for heating the fibrous web comprises, wherein the fibrous web is guided in the machine direction of the machine successively through the heating groups.
- the invention also relates to a heating group subsystem of a machine for producing or treating a fibrous web, in particular a paper or board web.
- the document WO 2014/180645 A1 discloses a cascade steam system for a dryer section of a paper machine in which the vapor pressure of the heating steam in the first heating group is higher than in the second heating group and higher than the vapor pressure in the third heating group.
- the heating system is arranged so that the vapor pressure of the heating groups in the machine direction increases.
- a thermocompressor is provided, which increases the pressure of the vapor of the last heating group so that it can be supplied to the heating group system again as heating steam.
- the document AT384254 B also describes a cascade steam system for a dryer section of a paper machine in which the vapor pressure of the heating steam in the first heating group is higher than in the second heating group and higher than the vapor pressure in the third heating group.
- the heating group system is arranged so that the vapor pressure of the heating groups in the machine direction increases.
- the vapor of the heating group with the lowest pressure level is deposited in a heat exchanger for heating the engine air and an auxiliary condenser.
- the object of the invention is to propose a heating system with improved energy efficiency and more flexible operation, as well as reduced energy consumption for paper drying.
- the invention relates to a method for operating a heating group subsystem of a machine for producing or treating a fibrous web, in particular a paper or board web, wherein the heating group subsystem comprises a first heating group and a last heating group and at least one further heating group each having at least one with a vapor pressure Heating steam heated device, in particular a drying cylinder, for heating the fibrous web comprises, wherein the fibrous web is seen in the machine direction, first by the first heating group, then passed through the at least one further heating group and then through the last heating group.
- the vapor pressure of the heating steam of the at least one further heating group is set lower than the respective vapor pressure of the heating steam of the first heating group and the last heating group.
- a heating group subsystem of a machine for producing or treating a fibrous web, in particular a paper or board web is proposed, wherein the heating group subsystem comprises a first heating group and a last heating group and at least one further heating group, each with at least one heating device having a steam pressure, in particular a drying cylinder, for heating the fibrous web comprises, wherein the fibrous web seen in the machine direction, first by the first heating group, then passed through the at least one further heating group and then through the last heating group.
- the vapor pressure of the heating steam of the at least one further heating group is lower than the respective vapor pressure of the heating steam of the first heating group and the last heating group.
- the heating group subsystem preferably forms part of the overall heating system of a machine for producing or treating a fibrous web, in particular a paper or board web. Seen in the machine direction, therefore, further heating groups can be arranged after the heating group subsystem.
- the heating group subsystem is advantageously used in a paper machine for drying the fibrous web in a dryer section.
- the dryer section is divided into a pre-dryer section and a post-dryer section. It is possible that that Walker lawteilsystem is used in the pre-dryer section and / or in the after-dryer section.
- the heating group subsystem is arranged so that the first heating group of the heating group subsystem is the first heating group in the running direction of the machine.
- the Schumanteilsystem is thus arranged at the beginning of the dryer section.
- the first heating group thus supplies the first or the first plurality of devices heated with a steam pressure having heating steam. This can also be applied correspondingly to a pre-drying section and / or a post-drying section.
- the vapor pressure of the heating steam of the at least one further heating group is, in contrast to the known state of the art of the cascade heating systems, lower than the vapor pressure of the first heating group.
- the at least one further heating group is arranged between the first heating group and the last heating group.
- the heating group subsystem according to the invention preferably has three heating groups.
- the at least one further heating group forms in this case the second heating group seen in the direction of the machine.
- the heating group subsystem according to the invention comprises four heating groups. So there are two more heating groups provided which form the second and the third heating group in this case.
- the vapor pressure of the heating steam of the two further heating groups is in each case lower than the respective vapor pressure of the heating steam of the first heating group and the last heating group.
- the heating group subsystem according to the invention may have more than four heating groups. So there are provided according to more than two more heating groups.
- the vapor pressure of the heating steam of the other heating groups is lower than the respective vapor pressure of the heating steam of the first heating group and the last heating group.
- the vapor pressure of the heating steam of the first heating group is set equal to or higher than the vapor pressure of the heating steam of the last heating group.
- the vapor pressure of the heating steam of the first heating group is thus the highest steam vapor pressure in the heating group subsystem.
- the vapor pressure of the heating steam of the at least one further heating group is set in the range between 50 kPa and 700 kPa above the ambient pressure, preferably between 50 kPa and 400 kPa.
- the vapor pressure of the heating steam of the first heating group is in the range between 200 kPa and 1000 kPa above the ambient pressure and the vapor pressure of the heating steam of the last heating group in the range between 300 kPa and 900 kPa above ambient pressure.
- the heating steam after flowing through the respective steam-heated device, is fed to a heating group in each case to a separator for separating condensate and vapor.
- the broth steam of the first heating group and the broth steam of the at least one further heating group and the broth steam of the last heating group are fed to the heating steam of the steam-heated device at least one of the at least one further heating group.
- the vapor vapor of the at least one further heating group is fed via a thermocompressor to the heating steam of the steam-heated device of at least one of the at least one further heating group.
- the thermocompressor is preferably supplied with live steam of a steam supply system, wherein the vapor pressure of the live steam is higher than the vapor pressure of the heating steam of the heating groups.
- the heating group subsystem seen in the direction of the machine comprising a dryer section, is provided at the beginning of a dryer section of a paper machine.
- the vapor pressure of the heating steam of the first heating group is set equal to or higher than the vapor pressure of the heating steam of the last heating group.
- the respective heating group and thus the respective at least one device heated with heating steam is connected via a steam supply line to a steam supply line.
- Each heating group is assigned a separator for the separation of condensate and Brüdendampf.
- the respective separator is connected in each case via a discharge line with the respective heating group and the respective steam-heated device.
- the separator of the first heating group and the separator of the at least one further heating group and the separator of the last heating group are each connected via a vapor line to the steam supply line of the at least one further heating group.
- the steam supply line is preferably connected to a steam supply system whose vapor pressure is higher than the vapor pressure of the heating steam of the heating groups.
- the vapor line for the vapor from the separator of the at least one further heating group for compression via a thermocompressor to the steam supply line is connected, wherein the thermocompressor is preferably connected to the steam supply line.
- the respective condensate line of the separator of the first heating group and of the separator of the last heating group is connected to the discharge line of one of the at least one further heating group.
- the vapor line of the first heating group has a backflow prevention device, for example a non-return valve.
- a backflow prevention device for example a non-return valve.
- a vacuum separator for generating or providing vapor condensate in the vacuum range is provided, which is connected via a vapor line with a thermocompressor, wherein the vapor of the vacuum separator is compressed by the thermocompressor and the steam supply line of the first heating group is supplied.
- FIG. 1a shows a schematic representation of a heating group subsystem for a dryer section of a paper machine with drying cylinders according to the prior art, which is designed as a cascade heating system consisting of 3 heating groups HG1, HG2, HG3.
- the heating groups are heated with heating steam.
- the steam supply pipes 3, 4, 5 are connected to a steam supply pipe 2.
- the steam supply lines 2 are supplied by a steam supply system DV with heating steam.
- the heating groups HG1, HG2, HG3 are arranged successively with respect to the running direction of the paper machine.
- the heating group HG1 thus forms the first heating group and supplies the first drying cylinders with heating steam.
- the steam supply line 2 also supplies an after-drying section NTP with steam.
- the amount of heating steam for each heating group is adjustable by valves.
- the mixture of saturated steam and condensate is fed via the discharge lines 6, 7, 8 to a respective separator S1, S2, S3 for the separation of the broth steam and condensate.
- the respective condensate is discharged.
- the Brüdendampf the heating group HG3 is supplied from the separator 3 via the vapor line 14 of the steam supply line 4 of the second heating group HG2. Accordingly, the Brüdendampf the heating group HG2 is supplied from the separator 2 via the vapor line 13 of the steam supply line 3 of the first heating group HG1.
- the Brüdendampf the heating group HG1 is supplied from the separator 1 via the vapor line 12 a capacitor KS and condensed there.
- the latent heat of the Brüdendampfes the heating group HG1 is therefore not used directly for paper drying.
- the vapor pressure PD of the heating steam in the heating groups HG1, HG2, HG3 are selected such that the first heating group HG1 has the lowest vapor pressure PD, the second heating group HG2 has the second lowest vapor pressure PD, and the third heating group HG3 has the highest vapor pressure PD.
- FIG. 2a shows an exemplary embodiment of a heating group subsystem according to the invention in a schematic and simplified representation for a dryer section of a paper machine with drying cylinders, comprising 3 heating groups HG1, HG2, HG3.
- the heating groups are heated with heating steam.
- the steam supply pipes 3, 4, 5 are connected to a steam supply pipe 2.
- the steam supply lines 2 are supplied by a steam supply system DV with heating steam.
- the heating groups HG1, HG2, HG3 are arranged successively with respect to the running direction of the paper machine.
- the heating group HG1 thus forms the first heating group and supplies one or more first drying cylinders with heating steam.
- the steam supply line 2 also supplies an after-drying section NTP with steam.
- the vapor pressure of the respective heating steam can be set independently for each heating group HG1, HG2, HG3 by means of valves. After the heating steam of a heating group HG1, HG2, HG3 has flowed through the drying cylinder or the cylinder, the mixture of broth steam and condensate via the discharge lines 6, 7, 8 to a respective separator S1, S2, S3 for the removal of vapor and condensate.
- the condensate of the heating group 2 is fed via the condensate line 10 to a condensate collector.
- the condensate of the heating group 1 is supplied from the separator 1 via the condensate line 9 of the discharge line 7.
- condensate of the heating group 3 is also supplied from the separator 3 via the condensate line 11 to the discharge line 7 of the heating group 2.
- the Brüdendampf the heating group HG3 is supplied from the separator 3 via the vapor line 14 of the steam supply line 4 of the second heating group HG2 and used again for the paper drying directly.
- the Brüdendampf the heating group HG1 is supplied from the separator 1 via the vapor line 12 of the steam supply line 4 of the second heating group HG2 and used again for the paper drying directly.
- the broth steam of the heating group HG2 is returned through the vapor line 13 via a thermocompressor from the separator 2 into the steam feed line 4 of the second heating group HG2, and thus also used directly again for the paper drying.
- the thermocompressor 15 acts as a jet pump, steam being used from the steam supply line 2 as the driving jet.
- the vapor pressure of the Brüdendampfes from the separator 2 of the heating group HG2 is characterized at least to the pressure level of Heating steam placed in the steam supply line 4.
- the steam pressure PD of the heating steam in the heating groups HG1, HG2, HG3 is selected such that the first heating group HG1 has the highest vapor pressure PD, the second heating group HG2 the lowest vapor pressure PD and the third heating group HG3 a vapor pressure PD which is between the vapor pressure of the first heating group HG1 and the second heating group HG2.
- FIG. 3 shows a practical, more detail comprehensive embodiment of a heating subset according to the invention after Figure 2a and 2b for a dryer section of a paper machine with drying cylinders 1.1, 1.2, 1.3, 1.4, 2.1, 2.2, 3.1, 3.2 comprising 3 heating groups HG1, HG2, HG3.
- the heating groups are heated with heating steam.
- the steam supply pipes 3, 4, 5 are connected to a steam supply pipe 2.
- the steam supply lines 2 are supplied by a steam supply system DV with heating steam.
- the first heating group HG1 comprises the drying cylinders 1.1, 1.2, 1.3.1.4
- the second heating group HG2 comprises the drying cylinders 2.1, 2.2
- the third heating group HG3 comprises the drying cylinders 3.1, 3.2.
- the heating groups HG1, HG2, HG3 are arranged successively with respect to the running direction of the paper machine.
- the heating group HG1 thus forms the first heating group and supplies several first drying cylinders 1.1, 1.2, 1.3, 1.4 with heating steam.
- the steam supply line 2 also supplies a night dryer section NTP or another steam consumer with steam.
- the vapor pressure of the respective heating steam can be set independently for each heating group HG1, HG2, HG3 by means of valves. After the heating steam of a heating group HG1, HG2, HG3 has flowed through the drying cylinder or the cylinder, the mixture of broth steam and condensate via the discharge lines 6, 7, 8 to a respective separator S1, S2, S3 for the removal of vapor and condensate.
- the condensate of the heating group 2 is supplied via the condensate line 10 to a condensate collection container, wherein previously heat for the Haubenzu poverty HZL was removed for the hood of the dryer section.
- the condensate of the heating group 1 is supplied from the separator 1 via the condensate line 9 of the discharge line 7. Accordingly, condensate of the heating group 3 is also supplied from the separator 3 via the condensate line 11 to the discharge line 7 of the heating group 2.
- the Brüdendampf the heating group HG3 is supplied from the separator 3 via the vapor line 14 of the steam supply line 4 of the second heating group HG2 and used again for the paper drying directly.
- the Brüddenampf the heating group HG2 is returned by the vapor line 13 via a thermocompressor 15 from the separator 2 in the steam supply line 4 of the second heating group HG2 again and thus also used again for the paper drying directly.
- the thermocompressor 15 acts as a jet pump, steam being used from the steam supply line 2 as the driving jet.
- the vapor pressure of the Brüdendampfes from the separator 2 of the heating group HG2 is thereby brought at least to the pressure level of the heating steam in the steam supply line 4.
- the steam pressure PD of the heating steam in the heating groups HG1, HG2, HG3 is selected such that the first heating group HG1 has the highest vapor pressure PD, the second heating group HG2 the lowest vapor pressure PD and the third heating group HG3 a vapor pressure PD which is between the vapor pressure of the first heating group HG1 and the second heating group HG2.
- valves and vapor lines 12, 13, 14 are provided, shown here with arrows to direct the vapors directly to a capacitor KS.
- vapor lines 17 from other heating groups, not shown here may be connected.
- the condenser KS is connected to lines CW for the supply and discharge of cooling water.
- the heating group subsystem 1 also includes a vacuum separator V in the condensate lines from a post-dryer section NTP open.
- the vacuum separator V generates from it vapor vapor, which will be passed directly into the condenser KS.
- thermocompressor 16 is provided with which it is possible to operate the heating group subsystem 1 as a classic cascade heating system, for example in the production of certain types of paper.
- the thermocompressor 16 acts as a jet pump, with steam from the steam supply line 2 being used as the driving jet.
- steam from the steam supply line 2 being used as the driving jet.
- the first heating group HG1 of the heating group subsystem 1 has the lowest vapor pressure of the heating steam of all the heating groups HG2, HG3 of the heating group subsystem 1 and the second heating group HG2 of the heating group subsystem 1 the second lowest vapor pressure and the third heating group HG3 the highest Vapor pressure of the heating steam.
- This thermocompressor 16 is connected to the vapor line 18 and to the steam supply line 2. This makes it possible in the case of cascade operation of the heating subset 1 of the resulting in the separator S1 and V in the vacuum separator vapor back into the steam supply line 3 of the heating group HG1 and directly to use for paper web drying.
- the vapor line 12 of the first heating group HG1 has a non-return valve 19 in order to prevent a backflow of heating steam from the steam supply line 4 via the vapor line 12 into the separator S1 of the first heating group HG1 or into the vacuum separator V.
- thermocompressor 16 may be out of service.
- the thermocompressor 16 can also be operated with steam from another steam supply network, for example a steam supply network with a higher vapor pressure.
- the vapor pressure of the Brüdendampfes from the vacuum separator V can thereby be brought at least to the pressure level of the heating steam in the DampfzuQuerytechnisch 3 and used directly for the drying of the paper web.
- valves in the steam supply lines 3, 4, 5 are connected to pressure control systems PIC for controlling the vapor pressure of the respective heating steam and the valves the discharge lines 6, 7, 8 are coupled to pressure difference control systems PDIC.
- the valves in the condensate lines 9, 10, 11 are equipped with leveling LIC.
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- Drying Of Solid Materials (AREA)
- Paper (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102016125172.0A DE102016125172A1 (de) | 2016-12-21 | 2016-12-21 | Verfahren zum Betrieb eines Heizgruppenteilsystems und Heizgruppenteilsystem |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3339507A1 EP3339507A1 (de) | 2018-06-27 |
EP3339507B1 true EP3339507B1 (de) | 2019-04-17 |
Family
ID=60182439
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17198197.0A Active EP3339507B1 (de) | 2016-12-21 | 2017-10-25 | Verfahren zum betrieb eines heizgruppenteilsystems und heizgruppenteilsystem |
Country Status (4)
Country | Link |
---|---|
US (1) | US10533284B2 (zh) |
EP (1) | EP3339507B1 (zh) |
CN (1) | CN108221450B (zh) |
DE (1) | DE102016125172A1 (zh) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4249838A3 (de) * | 2023-05-17 | 2023-11-22 | KARL MAYER STOLL R&D GmbH | Textilbahn-trocknungsvorrichtung |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016125172A1 (de) * | 2016-12-21 | 2018-06-21 | Voith Patent Gmbh | Verfahren zum Betrieb eines Heizgruppenteilsystems und Heizgruppenteilsystem |
GB2622394A (en) * | 2022-09-14 | 2024-03-20 | James Cropper Plc | A steam supply system and a method of supplying steam |
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CN205741757U (zh) * | 2016-05-12 | 2016-11-30 | 湖北宜昌翔陵纸制品有限公司 | 一种造纸烘干机冷凝水排放装置 |
CN205711542U (zh) * | 2016-06-19 | 2016-11-23 | 东莞市鼎邦机械科技有限公司 | 一种纸品智能节能温控系统 |
DE102016125172A1 (de) * | 2016-12-21 | 2018-06-21 | Voith Patent Gmbh | Verfahren zum Betrieb eines Heizgruppenteilsystems und Heizgruppenteilsystem |
-
2016
- 2016-12-21 DE DE102016125172.0A patent/DE102016125172A1/de not_active Withdrawn
-
2017
- 2017-10-25 EP EP17198197.0A patent/EP3339507B1/de active Active
- 2017-11-17 US US15/816,143 patent/US10533284B2/en active Active
- 2017-12-04 CN CN201711260359.2A patent/CN108221450B/zh active Active
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Cited By (1)
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EP4249838A3 (de) * | 2023-05-17 | 2023-11-22 | KARL MAYER STOLL R&D GmbH | Textilbahn-trocknungsvorrichtung |
Also Published As
Publication number | Publication date |
---|---|
DE102016125172A1 (de) | 2018-06-21 |
CN108221450A (zh) | 2018-06-29 |
US10533284B2 (en) | 2020-01-14 |
EP3339507A1 (de) | 2018-06-27 |
US20180171555A1 (en) | 2018-06-21 |
CN108221450B (zh) | 2019-11-12 |
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