EP1571255A1 - Dispositif et procédé de réduction de la perte de vapeur dans un système fermé - Google Patents

Dispositif et procédé de réduction de la perte de vapeur dans un système fermé Download PDF

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Publication number
EP1571255A1
EP1571255A1 EP04004959A EP04004959A EP1571255A1 EP 1571255 A1 EP1571255 A1 EP 1571255A1 EP 04004959 A EP04004959 A EP 04004959A EP 04004959 A EP04004959 A EP 04004959A EP 1571255 A1 EP1571255 A1 EP 1571255A1
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EP
European Patent Office
Prior art keywords
section
screw
gas
steam
container
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.)
Withdrawn
Application number
EP04004959A
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German (de)
English (en)
Inventor
Josef Berger
Erich Ortner
Werner Teufel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Essity Germany GmbH
Original Assignee
SCA Hygiene Products GmbH
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 SCA Hygiene Products GmbH filed Critical SCA Hygiene Products GmbH
Priority to EP04004959A priority Critical patent/EP1571255A1/fr
Priority to AT05700813T priority patent/ATE382733T1/de
Priority to PCT/EP2005/000180 priority patent/WO2005085519A1/fr
Priority to ES05700813T priority patent/ES2298992T3/es
Priority to DE502005002412T priority patent/DE502005002412D1/de
Priority to EP05700813A priority patent/EP1727935B1/fr
Publication of EP1571255A1 publication Critical patent/EP1571255A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/02—Pretreatment of the raw materials by chemical or physical means

Definitions

  • the present invention generally relates to a device and a method for reducing a Steam loss in a closed system.
  • the device and find the method of the present invention in particular use in the field of extraction of Primary pulps (digestion), the treatment of Secondary pulp from waste paper, the stock preparation in the general as well as defibering for particle board production.
  • Figure 1 is a system for Processing of secondary pulp from waste paper schematically shown how it z. As described in DE-A-197 42 729 is. In this case, only components for Germination, fractionation or grinding and dilution of the Fiber represented. However, it is the expert it can be seen that such systems also other others Components (eg for bleaching, for so-called "deinking", etc.) may include.
  • the system shown in Figure 1 it is a closed system with a Substance entry 1 and a substance discharge 2.
  • the into the system introduced solid is in this case a pulp, the For example, a certain consistency of about 35% OTRO (oven-dry, DIN EN 20 638) and a temperature of about 40 ° C has.
  • the pulp is placed over the fabric entry 1 in a heating screw 3 introduced.
  • the heating screw by means of a device supplied with live steam for supplying live steam 4, so that in the heating screw an environment with approximately 1.7 bar pressure and 105 to 115 ° C temperature. at These temperatures can effectively disinfect the Fibrous material to be carried in the heating screw transported and promoted and an appropriate Dwell time in the screw, for example, about 20 minutes having.
  • the Stoffeintrag preferably by means of a plug screw, so that the stuffing screw the printing system on the part of Substance entry completes.
  • Disperger 6 In the Disperger 6 are after the sterilization in dispersed disturbing contents of the pulp and cut into small pieces, leaving the final product through the remaining ingredients are not negatively affected becomes. Subsequently, the pulp from the Disperger 6 issued and via a screw conveyor 7 in a Discharge container 8 introduced.
  • the discharge 8 In the discharge 8 is a device for introducing Dilution water 9, dilution water in the Discharge container introduced to the highly consistent To make pulp pumpable.
  • the pumpable, Mid-consistency pulp is subsequently delivered via a pump Issued 10 from the discharge container 8 and has a Consistency of, for example, about 13% OTRO on.
  • the pulp is thus in a conveying direction in the System from the substance entry 1 to the substance discharge 2 promoted.
  • This system is a closed pressure system, on the one hand by the Stuffing screw (not shown) at the cloth entry and on the other hand by the pumpable pulp (im Essentially a liquid section) through the MC pump completed at the pulp discharge.
  • the Discharge container 8 via the means for supplying Dilution water 9, dilution water added to the Make pulp pumpable, so in a second Section 13 of the discharge container 8 a substantially Pulp-liquid mixture is present.
  • a substantially Pulp-liquid mixture is present in a second Section 13 of the discharge container 8 .
  • the technical basis underlying the present invention lies in a device and a method to provide that allows the loss of steam to reduce in closed systems and thereby the Energy balance of the overall system to improve.
  • the device of the present invention in that it comprises a container, the defines a closed space and through the in one Conveying direction from an inlet to an outlet Sediment transport takes place.
  • the solid it can For example, pulp, wood pulp, wood chips, etc. act.
  • the container of the device according to the invention is in the Promotion direction divided into three sections, of which in a first section essentially a solid-vapor mixture, essentially in a second section Solid-liquid mixture and in between lying intermediate portion substantially a solid-vapor-liquid mixture is present.
  • the device of The present invention further comprises at least one Place the container means for introducing an im Essentially non-condensable gas in the enclosed space, causing condensation of the steam in the container is reduced and therefore the loss of steam closed system with the device according to the invention can be reduced.
  • the device for initiating a essentially non-condensable gas in the enclosed space arranged so that the gas in the first section, so the section with the solid-vapor mixture can be initiated. That does not make that condensable gas is a kind of isolation barrier zone opposite the Steam out, which effectively reduces the Steam condensation causes in the container. Furthermore is formed by the gas also a kind of displacement body, the entrained vapor from the condensation surface pushes back. However, it is also conceivable that the gas in the second section or the intermediate section.
  • Invention is the device for initiating a in Essentially non-condensable gas in the enclosed space designed such that the gas under Pressure in the enclosed space can be introduced. This is especially necessary when the device of the present Invention is used in a printing system, so that this pressure must be overcome to introduce the gas.
  • the non-condensable gas Air inert gas, reactive gas or ozone used.
  • the Selection of the gas to be used is subject various considerations, including under Consideration of the overall system in which the inventive device is used. Becomes For example, a system for the preparation of Secondary pulp used from waste paper, which also has a Bleaching step, it should be noted that some Gases, such as oxygen, react with the bleach could. This could be the appropriate process be affected. In addition, however, could also be a Gas can be used which is reactive so as to be chemical Reactions cause, in turn, in the process useful and advantageous, such as Carbon dioxide for PH reduction of the pulp.
  • inert gases such as For example, argon, helium, krypton and other gases, such as for example, nitrogen.
  • gases such as for example, argon, helium, krypton and other gases, such as for example, nitrogen.
  • cost of the gas to be used so is For example, the production of ozone comparatively expensive. It is essential, however, that it is in the Gas is a so-called non-condensable gas.
  • the inlet is arranged such that it communicates with the first Section, ie the section with the pulp-vapor mixture, communicates and the outlet is so is arranged that he with the second section, ie the Section with the solid-liquid mixture, in Connection stands. This ensures that the Sediment transport in conveying direction from the first section via the intermediate section into the second section.
  • the inlet could also be arranged in such a way be that he is with the second section, hence the section with the solid-liquid mixture, communicating, wherein the outlet is arranged such that it communicates with the first section, ie the section with the solid-vapor mixture, communicates.
  • the solids transport would then done in a reverse direction and thus in Conveying direction from the second section over the Intermediate section in the first section.
  • the gas of the present invention selected such that when introducing the gas in the Container the condensation of the vapor in the closed Space, especially in the intermediate section and the second Section is reduced. This can reduce the loss of steam in a closed system with the invention Device be reduced accordingly.
  • the feed gas is with the solid Can be dispensed from the outlet in the conveying direction, so that it does not remains in the device.
  • the gas must be constantly updated. Also, the gas can be otherwise be issued.
  • the present invention proposes a device for Stock preparation, in particular waste paper preparation ago, which is a closed system with a heating screw and a discharge container, wherein a solids transport in the conveying direction of the heating screw to the Discharge container takes place.
  • Discharge container of this device a device, as they has been described above.
  • this further has a Disperger, the downstream in the conveying direction of the heating screw and the Discharge tank is arranged upstream to a To cause grinding or fragmentation of the pulp, so that remaining constituents can be comminuted, so that they no longer have negative effects in the end product to have.
  • the heating screw is between the heating screw and the discharge container or the Disperger and the Discharge container arranged a screw conveyor.
  • This screw conveyor is for example a stuffing screw, However, alternatively, a low-cost, conventional Screw conveyor, which is the mode of action of only one Having partially opened valve.
  • the system is advantageously a printing system.
  • the heating screw advantageously a device for supplying live steam in the Heating screw on, for example, the temperatures to Disinfection necessary to provide.
  • means for supplying Dilution water be provided in the discharge container to to train the second section and high consistency To make pulp pumpable.
  • the present invention also proposes a Apparatus for digestion in a closed system with a refiner and a discharge container.
  • a Device is, as the summary of the beginning Invention has been described.
  • the device according to the invention can be used for digestion advantageously a cyclone and a heat exchanger have, wherein the cyclone downstream of the refiner and is arranged upstream of the discharge and the Heat exchanger downstream of the cyclone in another winningzweig is arranged.
  • the cyclone essentially directly with the Discharge container connected.
  • the present invention proposes a Device for defibering in a closed system in front.
  • the defibration is in the present case a Device to understand in the wood chips (Wood chips) are processed, so this For example, be further processed to chipboard can.
  • This device according to the present invention has an entry screw and a steam room.
  • the Entry auger is advantageously with the steam space connected and there is a solids transport in Conveying direction from the entry screw to the steam room.
  • the Entry screw of the device for defibration of The present invention is a device such as was described at the beginning. This can be in addition to the Reduction of steam loss compared to the stand the technology on a cost-intensive and energy-intensive Stuffing screw can be dispensed as entry screw.
  • the entry screw of the Device for defibration an inlet for liquid offset solid and means for discharging the Liquid from the heating screw on.
  • the entry auger is in with the steam room Connection and make the pressure shutdown for the system on Furnish.
  • the present invention proposes appropriate method with the following steps. So initially a solids transport in a Forderides generated from an inlet to an outlet of a container, which defines a closed space and in the Delivery direction is divided into three sections.
  • the three Sections correspond to the three described above Sections of the container.
  • at least a location of the container substantially not condensable gas introduced into the enclosed space.
  • the inventive method for example, in a Process can be used for stock preparation, in particular for Waste paper preparation, for digestion or defibration Find use.
  • the device comprises a container 20 having a enclosed space defined.
  • a solid entry whereas via the outlet 22a a solids discharge takes place.
  • the substance entry can also through the inlet 21b and the substance discharge via the Outlet 22b. This variant is by the dashed arrows 25 and 26 shown.
  • the enclosed space defined by the container 20 is divided into three sections 12 to 14, of which in one first section 12 is a solid-vapor mixture and in a second section 13 a solid-liquid mixture is present.
  • Intermediate section 14 Arranged in between Intermediate section 14 is a kind of mixing zone of the two Sections 12, 13 above, leaving a solid-vapor-liquid mixture formed.
  • These mixed states can be found in minor amounts also contain other ingredients, such as For example, chemical residues or others Impurities. It will also be apparent to those skilled in the art that the boundaries between the sections are fluid and rather correspond to other areas and zones.
  • the Solids transport on the one hand through the inlet 21a in Direction 23 in the order of the first section 12, the Intermediate portion 14 and the second portion 13 of the Outlet 22a towards 24.
  • an alternative Embodiment follows the transport of solids exactly in the reverse direction, namely through the inlet 21b in Direction 25 in the order of the second section 13, via the intermediate section 14 and the first section 12 the outlet 22b in the direction 26th
  • the device has a device for Introducing a non-condensable gas 27, which in the illustrated embodiment, the first Embodiment with the inlet 21a and the outlet 22a corresponds to the first section 12 is in communication.
  • a facility for initiating a liquid medium 28 provided with the section 13 in Connection stands, and can serve the sections train.
  • this device 28 is not mandatory required. So can be seen as follows (see description of FIG. 6) also a substance entry in one Solid-liquid mixture and steam through the Inlet flow to form the sections. In this Case, however, would be a means for discharging Provide fluid.
  • the shown arrangement only for a solids transport in Direction of the arrows 23, 24. If the solids transport in reverse direction according to the arrows 25, 26, it would be the Device for introducing the non-condensable gas according to this exemplary embodiment with the section 12 arranged in connection.
  • a non-condensable gas in the Container is a kind of "isolation barrier" built, which is a vapor condensation of steam, with the solid entrained in the solids entry, d. H. in the container is introduced, on the surface of the liquid medium both in the intermediate section 14, and the second Section 13 reduced.
  • This can be effectively prevented be that by the steam condensation a sudden Pressure loss in the container 20 occurs, which is an undesirable Vapor flow into the device of the present invention could have resulted. It can also be effective Way a vapor loss prevented by the condensation become. Consequently, the loss of steam in one closed system with this device effectively be reduced.
  • FIG. 3 corresponds essentially the schematic system, with reference to Figure 1 in the Description of the description has been explained.
  • shown system is a closed System in which a solid entry in the form of a Fibrous with a certain consistency, like For example, 35% OTRO, is introduced.
  • This pulp is promoted by several bodies until he finally is introduced into a discharge container 8.
  • this Discharge container 8 is via a device 28th Dilution water supplied to the pulp pumpable make, so that a solids discharge or Faserstoffaustrag, for example, a medium-consistency pulp with approx. 13% OTRO can be done via a pump 10.
  • the device for feeding dilution water 28 preferably comprises four feed lines for the dilution water, the are positioned tangentially to the order container 8, the has a substantially circular cross-section.
  • the Feeders are over the edge or circumference of the Distributed container and are each at an angle of offset by about 90 °. Furthermore, they are in one step-like shape in the axial direction of the container positioned. In other words, the feeders are in different heights, which are approximately in one area from 100 mm to 500 mm, in particular by 300 mm, connected to the container.
  • the in the container introduced flake-shaped, high-consistency Fibrous material forced into one rotation, so in combination with the order and the feeding of pulp from or in the container at least in the lower region of the container (Section 13) a screw-like conveying movement of the Fibrous material is produced in the container.
  • the illustrated Plant also has a heating screw 3, the Disinfection of the pulp (secondary pulp from waste paper) Main steam is supplied.
  • the one used for feeding For example, live steam has a temperature of approx. 135 ° C and a pressure of 3.5 bar. This will be in the Heating screw temperatures between 105 ° C and 115 ° C at a pressure between about 1.2 - 2 bar, in particular of about 1.7 bar created for the sterilization of the pulp are advantageous.
  • the residence time of the pulp in the Sterilization is between about 10 to 30 minutes, in particular about 20 minutes, which is sufficient is seen.
  • the pulp is in the heating screw 3 continuously conveyed until it leaves the heating screw 3 is issued.
  • the heating screw 3 is connected via a screw 5 with a Disperger 6 connected, which serves remaining Ingredients in the pulp such as the Fibers adhering or distributed between the fibers To crush and distribute ink particles so that they have no negative impact on the final product.
  • the disperser 6 via a screw conveyor 7th connected to the discharge container 8, which according to a preferred embodiment, the operation of a partial has opened valve.
  • the necessary to a reliable operation of the Dispergers 6 is a vapor return line 11 connected on the one hand the Disperger downstream and on the other hand connected to the heating screw 3, so that a Steam return from one position to the disperser can be done downstream of the heating screw.
  • Discharge container 8 is by the supply of Dilution water through the device 28 a mixing zone formed so that in the discharge container 8 in Form three main sections.
  • a first Section 12 essentially forms a pulp-steam mixture from, wherein this first section 12 in the uppermost region of the discharge container 8 is arranged the solid entry takes place in the discharge container 8.
  • Another area is the area 13, where in the Essentially forms a fibrous-liquid mixture, the means of a medium consistency pump 10 from the Discharge container 8 can be discharged in the direction of 2.
  • Between the two sections 12 and 13 forms a Mixing zone in which both pulp and steam and Liquid present.
  • the solid according to the invention in order Pulp.
  • FIG. 4 shows the discharge container 8 of the system from FIG. 3 shown in an enlarged view and the three Sections were schematically visualized.
  • the above-mentioned three sections are formed. How out Figures 3 and 4 can be seen, the means for Supplying dilution water above or below the Border between the intermediate portion 14 and the section 13th of the solid-liquid mixture may be formed.
  • the surface of the solid-liquid mixture section and the surface of the liquid portions in the Intermediate section 14 form in the discharge container 8 in the Comparison to the temperature of the supplied pulp and the Steam "colder" condensation surface.
  • the one with the Fibrous introduced into the discharge tank 8 steam would therefore tend to condense on this surface, so that in the discharge container 8 in the condensation sudden pressure drop would arise.
  • This pressure drop would increase the flow of steam from the heating screw 3 lead into the discharge tank 8, so that the steam from the Heating screw 3 would escape, which in turn results that would have about the device for supplying live steam 4 new live steam are introduced into the heating screw would.
  • the generation of live steam requires one high energy consumption, so that this effect would be detrimental and should be avoided.
  • the discharge container 8 for this purpose a Device for introducing a non-condensable gas assigned in the exemplary embodiment with the Section 12 is connected. Since this is the present System is a pressure system, the gas, For example, air against which present in the system Pressure pressed in. The non-condensable gas tends to to flow on a cold surface. In the present case Form the section 13 and the liquid components in Intermediate section 14, the cold surface to the not condensable gas flows.
  • This forms in the Discharge container 8 is a kind of insulating barrier layer, the the condensation of the vapor in the discharge container 8 at the previously described condensation surface reduced.
  • the solids entry 1 was carried out with a pulp having a consistency of about 35% OTRO and was in the comparative experiments 12 tons per hour (t / h).
  • Figure 5 illustrates another exemplary embodiment a device for digestion according to the present invention Invention.
  • the illustration is purely exemplary and the system could include additional components. So these systems are generally multi-level, as is the Is known in the art.
  • the illustrated plant presents schematically a TMP or CTMP process for digestion.
  • the present invention is not limited to such Limited procedure. Rather, any method can for digestion use find.
  • the digestion system shown in FIG. 5 stops closed system.
  • the system is on Stoffeintrag 1 in the form of wood chips in one Entry screw 34.
  • This screw 34 are the Wood chips, for example, heated to 160 ° C.
  • the present system is also a printing system that works at between about 5 to about 8 bar.
  • the wood chips (solid) in a refiner 6 introduced.
  • This refiner is about one Motor M driven and generally requires a high Energy demand.
  • the chips become by the introduced refining work according to the process objective as completely as possible disassembled into individual fibers. Since it is about a technical process that affects efficiency is, this succeeds only to a certain extent.
  • a part the wood chips remain as fragment material (splinters are Fiber bundle), which then in a subsequent Process step with similar workflow with the same Basic objective is aftertreatment (multistage). Besides arise fiber fragments up to so-called flour material as constituents of the wood pulp, which are actually undesirable are eliminated from the system as far as possible.
  • the energy applied via the motor M is in the refiner in Form of mechanical work applied to the wood pulp. By the frictional heat generated thereby becomes the liquid content evaporated in the wood pulp or chips, so that The refiner leaves a mixture of steam and pulp.
  • the pulp with the steam is then further into a cyclone 29 promoted, in which a separation of the steam from the Fiber is to be made.
  • the cyclone 29 is on the one hand with another conveyor line in its upper area connected, which derive the steam via a heat exchanger 30 so that its heat in another process of System can be reused or can be used.
  • the connection between the Cyclone 29 and the discharge container 8 preferably via a Plug screw, another conventional screw conveyor or similar systems.
  • the discharge container always designed open, so that steam the guided via the screw with the pulp in the container becomes, escapes and gets lost.
  • the cyclone 29, however, directly to the discharge 8 connected This allows the additional components like the screw, plug screw or other facilities saved between the cyclone and the discharge container which leads to a significant cost reduction of the Entire facility leads.
  • the discharge container 8 is closed designed.
  • the invention is a device for initiating a non-condensable gas in the discharge container. 8 intended.
  • This will be similar to the system of Figure 3 describes a kind of insulation barrier generates the steam condensation in the discharge 8 reduced, so that the pressure in the discharge container 8 in Can be kept substantially constant.
  • This will be a increased steam flow in the direction of the discharge 8 prevents and the steam in the system can over the Heat exchangers 30 are used effectively. This is the result Total energy balance of the closed system considerably improved and occurring due to condensation Steam loss is reduced.
  • Figure 6 is another example of the application Device of the present invention shown. So shows Figure 6 shows a device for defibration, wherein the Final product after defibration for processing for example chipboard or MDF can be used.
  • Such devices have an entry screw 31 and a vapor space 32. Also with this system it acts is a closed system where the wood chips (Chips, shavings) in the steam room at a pressure of approx. 10 to about 15 bar and a temperature of about 170 ° C. be fiberized before being dispensed from the steam room become. Below are these chips, for example milled in a refiner and directly blown out of this, to be further processed. To those in the steam room prevailing environment of about 10 to about 15 bar at one Temperature of about 170 ° C is reached, the steam room Main steam supplied via a device 4. To the printing system compared to the substance entry 1 of Completing feed screw 31 is in the prior art previously provided a stuffing screw, which is a considerable Has a size and an enormous energy demand in the Has magnitude of 1000 KW.
  • a stuffing screw which is a considerable Has a size and an enormous energy demand in the Has magnitude of 1000 KW.
  • the device according to the present invention has a conventional feed screw, which in Compared to a plug screw construction is smaller and one much lower energy consumption on the order of 200 KW has.
  • the Complete printing system against substance entry be the wood chips on the Stoffeintrag 1 with a high liquid content introduced, so that a Section 13 with a solid (woodchip) liquid mixture trains, similar to the System in Fig. 3 forms the conclusion.
  • the Wood chips from the feed screw 31 in the steam room 32nd promoted.
  • the feed screw 31 of the exemplary Embodiment in Figure 6 further comprises a device 33rd for removing the introduced with the wood chips Liquid from the entry auger. From the steam room steam flows through the outlet of the feed screw. Thus, three are formed in the feed screw 31 Sections 12 to 14 off.
  • a section 13 is essentially a solid-liquid mixture exist, whereas in one section 12 are essentially a solid-vapor mixture becomes. Between these two sections forms also a mixing zone in an intermediate section 14, in the substantially a solid-vapor-liquid mixture is present. Consequently, that would also be the case System the problem that the in the steam room 32 introduced live steam at the liquid surface in the Entry screw 31 would condense. This would be in the Feed screw 31 lead to a pressure drop, so that a increased steam flow from the steam space 32 in the Entry screw would be done. However, this would become one increased vapor loss and therefore increased Lead energy because more live steam 4 are supplied would.
  • the present device has a Device for feeding a non-condensable gas in the entry screw 31.
  • Feeding the not condensable gas is preferably carried out in the Section 12 or Section 14.
  • the non-condensable Gas forms a kind in the entry screw 31 Isolation barrier layer, which is the condensation of the vapor at the liquid surface in the feed screw 31 (in FIG the sections 12, 14) is reduced, so that the pressure in the Entry screw 31 remains substantially constant. consequently Also, increased vapor flow from the vapor space 32 in FIG the entry screw 31 is reduced. This will do the whole Amount of energy needed to generate the live steam is reduced, resulting in an improved energy balance of Overall system leads.
  • the connection between Entry screw 31 and steam space 32 for example in the Form of a partially opened valve designed to a Escape of the injected gas in the steam room to avoid.
  • the device according to the invention is opposite the prior art advantageous because the conclusion of the Systems over a conventional auger in the farthest Senses can be done and not via a plug screw must be done. As the energy needs of a conventional Entry screw much lower than the one Is also the energy requirement of the Overall system reduced. In addition, both the Size, as well as the cost of the overall system by the Reduced device according to the invention.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
EP04004959A 2004-03-03 2004-03-03 Dispositif et procédé de réduction de la perte de vapeur dans un système fermé Withdrawn EP1571255A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP04004959A EP1571255A1 (fr) 2004-03-03 2004-03-03 Dispositif et procédé de réduction de la perte de vapeur dans un système fermé
AT05700813T ATE382733T1 (de) 2004-03-03 2005-01-11 Vorrichtung und verfahren zur reduzierung eines dampfverlustes in einem geschlossenen system
PCT/EP2005/000180 WO2005085519A1 (fr) 2004-03-03 2005-01-11 Procede et dispositif de reduction des pertes de vapeur dans un systeme ferme
ES05700813T ES2298992T3 (es) 2004-03-03 2005-01-11 Dispositivo y metodo para disminuir una perdida de vapor en un sistema cerrado.
DE502005002412T DE502005002412D1 (de) 2004-03-03 2005-01-11 Vorrichtung und verfahren zur reduzierung eines dampfverlustes in einem geschlossenen system
EP05700813A EP1727935B1 (fr) 2004-03-03 2005-01-11 Procede et dispositif de reduction des pertes de vapeur dans un systeme ferme

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04004959A EP1571255A1 (fr) 2004-03-03 2004-03-03 Dispositif et procédé de réduction de la perte de vapeur dans un système fermé

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EP1571255A1 true EP1571255A1 (fr) 2005-09-07

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EP04004959A Withdrawn EP1571255A1 (fr) 2004-03-03 2004-03-03 Dispositif et procédé de réduction de la perte de vapeur dans un système fermé
EP05700813A Expired - Lifetime EP1727935B1 (fr) 2004-03-03 2005-01-11 Procede et dispositif de reduction des pertes de vapeur dans un systeme ferme

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EP05700813A Expired - Lifetime EP1727935B1 (fr) 2004-03-03 2005-01-11 Procede et dispositif de reduction des pertes de vapeur dans un systeme ferme

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EP (2) EP1571255A1 (fr)
AT (1) ATE382733T1 (fr)
DE (1) DE502005002412D1 (fr)
ES (1) ES2298992T3 (fr)
WO (1) WO2005085519A1 (fr)

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Publication number Priority date Publication date Assignee Title
JP6381947B2 (ja) † 2013-09-04 2018-08-29 日東電工株式会社 携帯機器、充電システム、及び、電源回路基板等
CN115341400B (zh) * 2022-08-02 2025-03-18 安徽永利纸业有限公司 一种纱管纸生产用原料粉碎装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4236959A (en) * 1971-12-20 1980-12-02 Reinhall Rolf Bertil Method of producing fiber pulp by grinding fibrous material in a steam environment
WO1987001402A1 (fr) * 1985-09-03 1987-03-12 Chaudhuri Punya B Procede de production de pate de cellulose

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4236959A (en) * 1971-12-20 1980-12-02 Reinhall Rolf Bertil Method of producing fiber pulp by grinding fibrous material in a steam environment
WO1987001402A1 (fr) * 1985-09-03 1987-03-12 Chaudhuri Punya B Procede de production de pate de cellulose

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EP1727935B1 (fr) 2008-01-02
ATE382733T1 (de) 2008-01-15
DE502005002412D1 (de) 2008-02-14
EP1727935A1 (fr) 2006-12-06
ES2298992T3 (es) 2008-05-16

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