WO2020233898A1 - Verfahren und anlage produzieren von papier oder zellstoff - Google Patents
Verfahren und anlage produzieren von papier oder zellstoff Download PDFInfo
- Publication number
- WO2020233898A1 WO2020233898A1 PCT/EP2020/060039 EP2020060039W WO2020233898A1 WO 2020233898 A1 WO2020233898 A1 WO 2020233898A1 EP 2020060039 W EP2020060039 W EP 2020060039W WO 2020233898 A1 WO2020233898 A1 WO 2020233898A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- production
- chamber
- adsorbent
- exhaust air
- operating mode
- Prior art date
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F7/00—Other details of machines for making continuous webs of paper
-
- 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 and a production plant for producing paper or cellulose.
- production exhaust air In the production of paper and pulp, production exhaust air is generated with a high level of humidity.
- the production exhaust air often has a temperature of more than 50 ° C near the dew point and therefore leads to the formation of fog and odor and other microclimate changes such as black ice, which can cause displeasure among residents of the production plant, when it cools outside the production plant. This displeasure can even lead to protests that can hinder paper production and / or its expansion and / or make it more expensive.
- the invention is based on the object of specifying a method and a production plant for producing paper or cellulose, which are improved in particular with regard to a production waste output in the vicinity of a production plant.
- the object is achieved by a method with the features of claim 1 and a production plant with the features of claim 8.
- production waste air is dehumidified by adsorption by being passed through an adsorbent.
- the invention therefore provides for production exhaust air generated in the production of paper or cellulose to be passed through an adsorbent. This allows the production exhaust air to be dehumidified before it leaves a production plant, so that the pollution of the environment of the production plant by high humidity and its consequences such as fog, smell and black ice formation is advantageously reduced.
- heat for evaporating water contained in the production exhaust air is withdrawn from a coolant of a coolant circuit of the paper or pulp production for adsorption.
- heat from a coolant is advantageously used in order to evaporate water contained in the production exhaust air for adsorption, and at the same time the coolant is cooled by the heat extracted from it and thus supports its cooling effect.
- water is used as the coolant.
- production exhaust air emerging from the adsorbent is used for drying paper or pulp produced during production.
- This embodiment of the invention takes advantage of the fact that the production exhaust air is humidified and heated by the adsorption so that it can be used for drying in the production of paper or pulp.
- the energy efficiency of production is advantageously increased in that the adsorption heat released during adsorption is used to dry the paper or pulp produced.
- a moisture content of the adsorbent is continuously determined, a threshold value for the moisture content is specified and the adsorbent is dehumidified by desorption when the moisture content exceeds the threshold value.
- a steam is passed through the adsorbent for desorption. Steam emerging from the adsorbent can be used to heat fresh water from paper or pulp production.
- Exceeds threshold The threshold value is adapted to the capacity of the adsorbent to absorb moisture. Any steam that is already present is preferably passed through the adsorbent for desorption. The use of steam emerging from the adsorbent to heat fresh water from paper or pulp production further increases the energy efficiency of production.
- a zeolite is used as the adsorbent.
- Zeolites are advantageously suitable as adsorbents for carrying out the process, since they are inexpensive and have a high capacity to absorb moisture.
- One embodiment of the production system according to the invention provides a coolant circuit which can be thermally connected to each dehumidifying chamber via a first heat exchanger in order to extract heat for evaporating water contained in the production exhaust air in the first operating mode of the dehumidifying chamber from a coolant of the coolant circuit.
- each dehumidifying chamber can be connected to a first heat exchanger which is set up to heat the production exhaust air emerging from the dehumidifying chamber for drying in the first operating mode of the dehumidifying chamber from the production of paper or pulp.
- a humidity sensor is arranged in each dehumidification chamber, which is set up to determine a moisture content of the adsorbent in the dehumidification chamber.
- a dehumidifying chamber is operated in the second operating mode when the moisture content exceeds a predetermined threshold value.
- a steam is passed through the dehumidification chamber in the second operating mode of an Ent humidity chamber.
- steam emerging from the Ent humidity chamber is used to heat fresh water in production.
- a production plant according to the invention and the above-mentioned configurations of such a production plant make it possible to carry out the method according to the invention and the above-mentioned configurations of the method.
- the advantages of a production plant according to the invention and the above-mentioned configurations therefore correspond to the above-mentioned advantages of the method according to the invention and its configurations.
- a further embodiment of the production plant according to the invention has at least two dehumidifying chambers that are operated alternately and in opposite directions in the two operating modes, so that one of the dehumidifying chambers is operated in the first operating mode when the other Ent humidity chamber is operated in the second operating mode .
- This configuration of the production plant according to the invention advantageously enables continuous dehumidification of production exhaust air, since at least one dehumidification chamber is always available for dehumidification.
- the operation of the production plant and / or the dehumidification of the production exhaust air must therefore not be interrupted if a dehumidification chamber has to be dehumidified in order to be able to absorb moisture from the production exhaust air again.
- FIG. 1 shows a block diagram of an embodiment of a production plant for producing paper
- FIG. 2 shows a first flow diagram of flows of production exhaust air, steam and coolant of the production plant shown in FIG. 1,
- FIG. 3 shows a second flow diagram of flows of production exhaust air, steam and coolant of the production plant shown in FIG.
- FIG. 1 shows a block diagram of an exemplary embodiment of a production plant 1 for producing paper.
- the production plant 1 includes, among other things, a paper machine 3 and an exhaust air dehumidifier 5.
- the exhaust air dehumidifier 5 With the exhaust air dehumidifier 5 during the paper production from the paper machine 3 exiting production air is dehumidified.
- the exhaust air dehumidifier 5 has two dehumidification chambers 7,
- FIGS. 2 and 3 show different flow diagrams of flows of production exhaust air, steam and coolant of the production plant 1 shown in FIG.
- Each dehumidifying chamber 7, 9 of the exhaust air dehumidifier 5 can optionally be operated in one of two operating modes.
- a first operating mode production exhaust air is dehumidified in the dehumidifying chamber 7, 9 by the production exhaust air being passed through the dehumidifying chamber 7, 9, where the adsorbent 11 adsorbs water vapor contained in the production exhaust air.
- the adsorbent 11 is dehumidified by desorption by being passed through the dehumidifying chamber 7, 9 by a heat source, for example from a heat pump, emitted or heated steam, where the
- the production plant 1 For each dehumidification chamber 7, 9, the production plant 1 has an exhaust air supply line 13 with a shut-off element 15 and an exhaust air discharge line 17 with a shut-off element 19, a steam supply line 21 with a shut-off element 23 and a steam discharge line 25 with a shut-off element 27. Furthermore, the production plant 1 has a coolant circuit 29 in which a coolant, for example water, is used to cool units and / or rooms of the production plant 1. The coolant circuit 29 is thermally ver connectable with each Ent moisture chamber 7, 9 via a heat exchanger 31. The heat exchanger 31 is connected to the coolant circuit 29 via a coolant supply line 33 with a shut-off element 35 and a coolant discharge line 37 with a shut-off element 39.
- a coolant for example water
- a dehumidification chamber 7, 9 is supplied via the exhaust air supply line 13 with production exhaust air which is discharged from the Entfeuchtekam mer 7, 9 via the exhaust air discharge line 17.
- the dehumidification chamber 7, 9 is thermally connected to the coolant circuit 29 via the heat exchanger 31 in order to supply the coolant of the coolant circuit run 29 to extract heat for evaporation contained in the production exhaust air.
- the shut-off elements 15, 19 of the exhaust air supply line 13 and the exhaust air discharge line 17 are open, the shut-off elements 23, 27 of the steam supply line 21 and the steam discharge line 25 are closed and the shut-off elements 35, 39 of the coolant feed line 33 and the coolant discharge line 37 are open net.
- the production exhaust air is dehumidified and heated by adsorption in the dehumidifying chamber 7, 9.
- the produc onsstrom 1 has for each dehumidification chamber 7, 9 a heat exchanger 41, which removes heat from the heated and dehumidified production exhaust air in the dehumidification chamber 7, 9, which is used, for example, for drying paper produced during production.
- the cooled, dehumidified production air is passed through an outlet 43, for example an exhaust air dome, from the production plant 1 to the environment.
- the dehumidifying chambers 7, 9 are operated alternately and in opposite directions in the two operating modes, so that one of the Ent humidity chambers 7, 9 is operated in the first operating mode, while the other dehumidifying chamber 7, 9 is operated in the second operating mode.
- FIG. 2 shows an operating state of the production plant 1 in which a first dehumidifying chamber 7 is operated in the first operating mode and the second dehumidifying chamber 9 is operated in the second operating mode.
- the production exhaust air flows through the exhaust air supply line 13 of the first dehumidifying chamber 7, the first dehumidifying chamber 7 and the exhaust air discharge line 17 of the first dehumidifying chamber 7.
- the steam flows via the pump 45 through the steam supply line 21 of the second dehumidifying chamber 9, the second dehumidifying chamber 9 and the vapor discharge line 25 of the second dehumidifying chamber 9.
- the coolant flows from the coolant circuit 29 through the coolant supply line 33 of the first dehumidifying chamber 7 to the heat exchanger 31 of the first dehumidifying chamber 7 and from there back through the coolant discharge line 37 of the first dehumidifying chamber 7 into the coolant circuit 29.
- FIG. 3 shows an operating state of the production plant 1 in which the first dehumidifying chamber 7 is operated in the second operating mode and the second dehumidifying chamber 9 is operated in the first operating mode.
- the production exhaust air flows through the exhaust air supply line 13 of the second dehumidifying chamber 9, the second dehumidifying chamber 9 and the exhaust air discharge line 17 of the second dehumidifying chamber 9.
- the steam flows via the pump 45 through the steam supply line 21 of the first humidity chamber 7, the first dehumidifying chamber 7 and the vapor discharge line 25 of the first dehumidifying chamber 7.
- the coolant flows from the coolant circuit 29 through the coolant supply line 33 of the second dehumidifying chamber 9 to the heat exchanger 31 of the second dehumidifying chamber 9 and from there through the coolant discharge line 37 back into the second dehumidifying chamber 9 the coolant circuit 29.
- a humidity sensor 47 is arranged in each dehumidification chamber 7, 9, which is set up to determine a moisture content of the adsorbent 11 in the dehumidification chamber 7, 9. If the
Landscapes
- Drying Of Gases (AREA)
- Paper (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20721446.1A EP3959375A1 (de) | 2019-05-17 | 2020-04-08 | Verfahren und anlage produzieren von papier oder zellstoff |
BR112021022847A BR112021022847A2 (pt) | 2019-05-17 | 2020-04-08 | Processo e sistema para a produção de papel ou celulose |
CN202080036512.7A CN113840959B (zh) | 2019-05-17 | 2020-04-08 | 用于制造纸张或纸浆的方法和设备 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19175079.3 | 2019-05-17 | ||
EP19175079.3A EP3739117A1 (de) | 2019-05-17 | 2019-05-17 | Verfahren und anlage zum produzieren von papier oder zellstoff |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2020233898A1 true WO2020233898A1 (de) | 2020-11-26 |
Family
ID=66589424
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2020/060039 WO2020233898A1 (de) | 2019-05-17 | 2020-04-08 | Verfahren und anlage produzieren von papier oder zellstoff |
Country Status (4)
Country | Link |
---|---|
EP (2) | EP3739117A1 (de) |
CN (1) | CN113840959B (de) |
BR (1) | BR112021022847A2 (de) |
WO (1) | WO2020233898A1 (de) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050132598A1 (en) * | 2003-12-19 | 2005-06-23 | Kimberly-Clark Worldwide, Inc. | Method and system for heat recovery in a throughdrying tissue making process |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4317768A1 (de) * | 1993-05-28 | 1994-12-01 | Somos Gmbh | Verfahren und Vorrichtung zum Aufbereiten eines insbesondere feuchten Adsortionsmittels |
JP4746798B2 (ja) * | 2001-01-30 | 2011-08-10 | 高砂熱学工業株式会社 | 汚染物の浄化方法及び浄化装置 |
WO2014029719A1 (de) * | 2012-08-20 | 2014-02-27 | Voith Patent Gmbh | Trockenhaube |
-
2019
- 2019-05-17 EP EP19175079.3A patent/EP3739117A1/de not_active Withdrawn
-
2020
- 2020-04-08 WO PCT/EP2020/060039 patent/WO2020233898A1/de unknown
- 2020-04-08 CN CN202080036512.7A patent/CN113840959B/zh active Active
- 2020-04-08 EP EP20721446.1A patent/EP3959375A1/de active Pending
- 2020-04-08 BR BR112021022847A patent/BR112021022847A2/pt unknown
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050132598A1 (en) * | 2003-12-19 | 2005-06-23 | Kimberly-Clark Worldwide, Inc. | Method and system for heat recovery in a throughdrying tissue making process |
Also Published As
Publication number | Publication date |
---|---|
EP3739117A1 (de) | 2020-11-18 |
BR112021022847A2 (pt) | 2022-04-12 |
CN113840959B (zh) | 2024-04-16 |
EP3959375A1 (de) | 2022-03-02 |
CN113840959A (zh) | 2021-12-24 |
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