WO2004022825A1 - Verfahren und vorrichtung zur versorgung von mit flüssigkeit beaufschlagten wärmetauschern mit wärmetauschmedium - Google Patents
Verfahren und vorrichtung zur versorgung von mit flüssigkeit beaufschlagten wärmetauschern mit wärmetauschmedium Download PDFInfo
- Publication number
- WO2004022825A1 WO2004022825A1 PCT/EP2003/008985 EP0308985W WO2004022825A1 WO 2004022825 A1 WO2004022825 A1 WO 2004022825A1 EP 0308985 W EP0308985 W EP 0308985W WO 2004022825 A1 WO2004022825 A1 WO 2004022825A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- heat exchange
- exchange medium
- heat exchanger
- heat
- circuit
- Prior art date
Links
Classifications
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
- D02J13/00—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass
- D02J13/006—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass in a fluid bed
Definitions
- the invention relates to a method and a device for supplying heat exchangers to liquid exchanged heat exchangers, the heat exchange medium coming directly into contact with the thread to be treated in the heat exchanger.
- a device for the treatment of synthetic threads is known from EP 0 624 208 B1.
- the heat exchanger is used both as a heating device and also as a cooling device.
- Fiuid - once hot and once cold - is directly associated with the yarn.
- the fluid is located in a heat exchange chamber through which the fluid flows.
- This heat exchange chamber is essentially tubular and has small bores at both ends through which the yarn is introduced and is passed out again after passing through the heat exchange chamber.
- supply and discharge lines for the heat exchange medium are provided on the chamber in order to act upon the heat exchange chamber with a suitable heat exchange medium.
- the object of the present invention is to provide a method and a device which make it possible to use liquid heat exchangers in an efficient manner for the heat treatment of threads. This object is solved by the features of the independent claims.
- sealing medium In heat exchangers, in which sealing medium is used to seal the yarn inlet and thread outlet opening, which mixes with the heat exchange medium, the admixed sealing medium is separated from the latter when the heat exchange medium emerging from the heat exchanger is collected. As a result, the heat exchange medium in its original form can be introduced into the heat exchanger for reuse. If the sealing medium is under overpressure, Furthermore, the advantage that the excess pressure acts as a discharge pressure when the discharge is carried out together, so that the discharge line can be arranged higher than the heat exchanger.
- the heat exchange medium After leaving the heat exchanger, the heat exchange medium expediently runs through a circuit in which the heat exchange medium is collected, separated from any admixed sealing medium and brought to the desired temperature and composition before it is fed back to the heat exchanger.
- a secondary circuit is expediently provided for filtering, cooling and measuring the composition of the heat exchange medium.
- the cooling in the secondary circuit In order to keep the temperature of the collected heat exchange medium at the desired temperature, the cooling in the secondary circuit is controlled. However, instead of cooling, the flow rate in the secondary circuit can also be controlled, so that more cooled heat exchange medium is supplied to the collected heat exchange medium when its temperature rises. If there is a malfunction in the process, individual work stations can be easily removed from the heat exchange circuit and put back into operation after the malfunction has been rectified.
- a collecting container in which the heat exchange medium is collected and brought to a certain temperature.
- a pump ensures that the heat exchange medium is returned to the heat exchanger in such a way that the temperature in the heat exchanger remains constant. This can be done, for example, by the amount of heat exchange medium fed into the heat exchanger controlled by the pump. It is expedient to supply a large number of heat exchangers together via a collecting line and to conduct the heat exchange medium from these heat exchangers in a common discharge line into the collecting container.
- the foam formation in the collection container caused by the spinning finish is monitored by a foam sensor, which rise of a certain foam level from a defoaming agent container.
- the collecting container is advantageously connected to a secondary circuit in which there is a cooling device and a measuring device for the composition of the heat exchange medium.
- a filter is installed upstream of these two devices to ensure that they work properly and to remove any contaminants that can lead to deposits.
- a backwash filter is expediently used for this, so that the continuity of the treatment process is guaranteed.
- the composition of the heat exchange medium can also be reliably determined and, at the same time, the temperature in the collecting container can be precisely controlled at the desired level via the secondary circuit.
- a recycling circuit can be connected to the collection container in order to clean and reuse the heat exchange medium oversaturated with the spin finish.
- the heat exchanger When using fluid-operated heat exchangers, it is important to be able to disconnect a single job from the supply of heat exchange medium after a process failure and its elimination, without affecting neighboring jobs.
- the heat exchanger is provided with a shut-off and drainage device.
- An additional emptying opening and a ventilation opening ensure a quick emptying and filling process.
- a safety device prevents the heat exchanger from opening if the supply of heat exchange medium is not uncoupled.
- the thread In order to avoid sticking of the draw-off roller pair or the friction disks and thereby further disturbances in the yarn treatment process, the thread is only inserted into the heater when the process starts, when the heat exchanger is effective, for which purpose a thread insertion device is provided. Further details of the invention will be explained with reference to the drawings.
- Fig. 1 shows the supply system in a schematic representation
- Fig. 2 shows the heat exchanger in the closed state
- Fig. 3 shows the thread run when starting the yarn treatment process
- FIG. 4 shows a foam reduction device in a schematic representation.
- the invention is described by way of example using a heat exchanger 1, which works as a cooler in a false twist texturing process and is fed into the heat exchange medium in the form of water by the pump 21 via the feed line 13.
- the heat exchanger 1 could also work as a heater and a heat exchange medium other than water could be used. It would only change the working temperature in the heat exchanger 1.
- the cooler 1 has a yarn inlet opening 11 and a yarn outlet opening 12 through which the thread F runs in the direction of the arrow and is thus cooled to the desired temperature after leaving the heater 7 (FIG. 3). After leaving the cooler 1, the cooled thread F runs over the friction disks 4 to impart twist before it is fed through a pair of draw-off rollers 92 to a winding device, not shown here.
- the cooling medium comes into direct contact with the thread F, so that the spin finish adhering to the thread F is washed off.
- the cooling medium in the cooler 1 must be kept very precisely at the necessary cooling temperature. There is therefore as much cooling medium in each case via the feed line 13 and the pump 21 supplied with a certain temperature that the heat absorbed by the thread through the cooling medium is completely dissipated via the derivatives 14, so that the temperature of the cooling medium in the heat exchanger 1 remains constant.
- the quantity to be supplied is regulated and metered by the pressure meter 29, which controls the pump 21. It is therefore expedient to use a frequency-controlled pump 21 which can be precisely controlled in terms of its delivery rate.
- cooler 1 Although only a single cooler 1 is shown in FIG. 1, a cooler 1 is provided in the texturing machine for each individual work station. This plurality of coolers 1 is supplied with cooling medium by a distributor line 22. The cooling medium used in the cooler 1 is returned via a common discharge line 3, into which the derivatives 14 of the cooler 1 open. In order to prevent the cooling liquid from escaping at the yarn inlet point 11 or yarn outlet point 12, sealing devices are usually provided at these openings, to which sealing medium is applied. In the cooler 1 shown here, air is used as the sealing medium, for example, and is supplied via the feed lines 15 to the sealing devices, for example labyrinth seals.
- the sealing medium pushes back the coolant that has entered the sealing device, thereby preventing it from escaping from the inlet opening 11 or outlet opening 12. It mixes with the coolant and is fed to the discharge line 3 together with the coolant via the discharge line 14.
- the discharge line 3 transports the used and enriched with sealant coolant into a collecting container 2, from which the coolant, after appropriate preparation by the pump 21, is fed back to the cooler 1 via the lines 22 and 13 of the coolant.
- the coolant is reprocessed in the collecting container 2.
- the sealing medium here air
- the collecting container 2 settles in the collecting container 2, but foam formation can occur. If the Foam level of a certain height, this is determined by a foam sensor 26, which controls a valve 27 through which defoaming agent 28 is fed from a defoaming agent container into the collecting container 2 in order to promote air deposition and to reduce foam formation.
- Foam reduction is very effective per se, but in many cases it is disadvantageous to have chemical additives in the coolant reuse that may be present. knock down on the threads to be cooled.
- Foam reduction is therefore preferably carried out using a vacuum device (FIG. 4).
- the collecting container 2 is provided with a lid 31 which is placed at a distance above the container 2.
- a nozzle 32 is provided in the center of the cover 31, via which a vacuum pump 33 is connected to the space under the cover 31.
- the vacuum pump 33 mainly draws so-called false air, which is drawn in around the container 2 by the distance. There is an air flow over the container 2. If the foam comes up suddenly and suddenly, e.g. by manually adding spin finishes, the individual bubbles of foam 30 are sucked away by this air flow at high speed.
- Fig. 4 shows a situation in which the foam 30 is sucked off as described above.
- Foam reduction by means of an ultrasound device would also be possible. There are already finished devices on the market that are suitable for this application. A detailed description is therefore not necessary. However, the foam reduction by means of negative pressure is more economical, as described above in accordance with FIG. 4.
- a secondary circuit 5 is connected to the collecting container 2, in which a secondary circuit pump 51, a filter 52 and a cooler 53 are integrated. Furthermore, before the secondary circuit 5 enters the collecting container 2, a measuring device 54 is also installed, which measures the composition of the cooling medium.
- thermometer 25 is provided as a sensor on the collecting container 2, which controls a cooling unit 53 in the system shown here in FIG. 1, through which the water in the secondary circuit 5 is pumped and cooled.
- the control can be carried out in two ways: the thermometer controls the amount of the cooling medium delivered by the pump 51 with constant cooling output of the cooling unit 53. Alternatively, however, the output of the cooling unit 53 can be controlled with a constant delivery amount of the pump 51. The latter has proven to be more economical in energy consumption.
- the spin finish concentration in the cooling medium has a great influence on the stability of the yarn treatment process and on the twist entry by the twist element in the thread. Too little spin finish is bad, but too much spin finish is also bad. It is therefore important to determine the spin finish concentration, which is conveniently done by measuring the turbidity of the cooling medium. Depending on the measured spin finish concentration, the cooling medium is adjusted to the optimal concentration tion brought. A concentration of 0.5 to 2% has proven to be optimal for process reliability. This takes place in the secondary circuit 5 connected to the collecting tank 2, in which the measuring device 54 for the composition of the cooling medium is integrated. This is designed, for example, as a turbidity meter. This turbidity meter 54 is expediently arranged at the end of the secondary circuit 5, in any case after the filter 52, since at this point the turbidity is best constant and can therefore be measured exactly.
- the turbidity is mainly generated by the spin finish, which is applied to the yarn F. While the yarn F is passed through the cooler and is in direct contact with the cooling medium, the cooling medium washes the spin finish from the thread F. This spinning finish is returned with the cooling medium to the collecting tank 2 and also reaches the secondary circuit 5. This is fed by the pump 51 from the collecting tank 2. A so-called work window is built into the line of the secondary circuit 5 and is measured by means of the turbidity sensor 54. If the system displays a measurement that indicates an excessively high spin finish concentration, water is automatically removed from the collecting container 2 via a valve 24 and fresh water is supplied through a second valve 23. This heavily loaded cooling medium is then cleaned before it reaches the sewage pipe. However, a recycling circuit can also be connected via the valves 24 and 23, through which the cooling medium is cleaned in such a way that it can be returned to the collecting container 2 through the fresh water valve 23.
- the secondary circuit 5 is constantly in operation by the pump 51, so that cooling medium is continuously pumped out of the reservoir 2 through this secondary circuit 5.
- the cooling medium passes through a filter 52 in the secondary circuit 5, which filter removes all coarser impurities and thus prevents deposits.
- a backwash filter 52 is expediently used here, so that during the ongoing yarn process Filter 52 can always be cleaned and interruptions avoided.
- This secondary circuit 5 thus cleans the coolant and controls the temperature and the spin finish concentration in the coolant.
- the thread F emerging from the heater 7 is introduced into the cooler 1 through the thread inlet opening 11 and then led out through the thread outlet opening 12 to the swirl unit 4.
- the seals at the thread inlet 11 and at the thread outlet 12 are each made using labyrinth seals which are pressurized with air. While the cooling medium is supplied via the distributor line 22, the sealing medium and the used cooling medium are discharged together via the discharge line 14 and the discharge line 3. The sealing medium is fed to the labyrinth seals via line 15.
- Such seals of thread coolers are well known, for example by EP 0 624 208 B1 or the unpublished patent application PCT / DE01 / 02643 by the same applicant, so that a more detailed description is not necessary here.
- the cooler 1 has a cover 6 which can be pivoted about hinges 61 and through which it can be opened in order to insert the thread F.
- the cooler 1 has a control lever 17 which actuates a control shaft 16. By moving the lever 17 from the position shown in FIG. 2 upward by approximately 90 °, the control shaft 16 is rotated by the same angle and the supply line 13 and the discharge lines 14 are closed by control cams arranged on this control shaft.
- the thread F must be inserted into the swirl element 4, the cooler 1 and the heater 7 when the yarn treatment process starts, while it is already being transported through the take-off rollers 92 at operating speed. Since the cooler 1 only has its full effectiveness after inserting the thread F when the water filling is reached again in the closed state, the thread F may only be heated when the cooler 1 is effective, otherwise the uncooled one Thread F leads to sticking of the swirl element 4. According to the invention, therefore, the running thread F is only exposed to the heating effect of the heater 7 when the yarn treatment process is started, when the effectiveness of the cooler 1 is given. Therefore, a device is provided on the heater 7, which thread outside the heater conducts until the cooler 1 has reached its effectiveness, whereupon the thread F is inserted into the heater 7.
- a switchable thread guide device 8 which, according to FIG. 3, holds the thread outside the heater 7 in the starting phase, so that the latter is not exposed to the heating effect.
- This approach thread run is indicated by the line F1 in Fig. 3.
- the thread guide device 8 is switched over, so that the thread F receives its normal thread running position and runs through the heating unit 7 and is thus exposed to the heating effect.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Treatment Of Fiber Materials (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2003260411A AU2003260411A1 (en) | 2002-08-16 | 2003-08-13 | Method and device for providing heat exchangers supplied with liquids with a heat exchanging medium |
EP03793732A EP1530656A1 (de) | 2002-08-16 | 2003-08-13 | Verfahren und vorrichtung zur versorgung von mit flüssigkeit beaufschlagten wärmetauschern mit wärmetauschmedium |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10238350.2 | 2002-08-16 | ||
DE2002138350 DE10238350A1 (de) | 2002-08-16 | 2002-08-16 | Verfahren und Vorrichtung zur Versorgung von mit Flüssigkeit beaufschlagten Wärmetauschern mit Wärmetauschmedium |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2004022825A1 true WO2004022825A1 (de) | 2004-03-18 |
WO2004022825A8 WO2004022825A8 (de) | 2005-04-28 |
Family
ID=30775491
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2003/008985 WO2004022825A1 (de) | 2002-08-16 | 2003-08-13 | Verfahren und vorrichtung zur versorgung von mit flüssigkeit beaufschlagten wärmetauschern mit wärmetauschmedium |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1530656A1 (de) |
AU (1) | AU2003260411A1 (de) |
DE (1) | DE10238350A1 (de) |
WO (1) | WO2004022825A1 (de) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2886403A (en) * | 1956-01-31 | 1959-05-12 | American Cyanamid Co | Method for the liquid treatment of continuous filamentary material |
US3783649A (en) * | 1971-10-07 | 1974-01-08 | Asahi Chemical Ind | Apparatus for continuously treating fibrous materials under pressure |
US4332151A (en) * | 1980-09-05 | 1982-06-01 | D.I.E.N.E.S Apparatebau Gmbh | Apparatus for heat treatment of synthetic yarns and fibers |
US5497637A (en) * | 1994-03-29 | 1996-03-12 | Ful-Dye, Inc. | Dye bath structure and apparatus for applying dye to textiles |
DE19909380A1 (de) * | 1999-02-16 | 2000-08-17 | Temco Textilmaschkomponent | Verfahren zum Einführen und Anlegen von Garn und Falschdralltexturiereinrichtung |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19625365A1 (de) * | 1995-06-30 | 1997-01-09 | Barmag Barmer Maschf | Kühlvorrichtung zum Kühlen eines laufenden Fadens |
DE10058543A1 (de) * | 2000-07-14 | 2002-01-24 | Temco Textilmaschkomponent | Verfahren und Vorrichtung zur kontinuierlichen Behandlung von synthetischen Fäden in einer Wärmeaustauschkammer |
-
2002
- 2002-08-16 DE DE2002138350 patent/DE10238350A1/de not_active Withdrawn
-
2003
- 2003-08-13 WO PCT/EP2003/008985 patent/WO2004022825A1/de not_active Application Discontinuation
- 2003-08-13 AU AU2003260411A patent/AU2003260411A1/en not_active Abandoned
- 2003-08-13 EP EP03793732A patent/EP1530656A1/de not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2886403A (en) * | 1956-01-31 | 1959-05-12 | American Cyanamid Co | Method for the liquid treatment of continuous filamentary material |
US3783649A (en) * | 1971-10-07 | 1974-01-08 | Asahi Chemical Ind | Apparatus for continuously treating fibrous materials under pressure |
US4332151A (en) * | 1980-09-05 | 1982-06-01 | D.I.E.N.E.S Apparatebau Gmbh | Apparatus for heat treatment of synthetic yarns and fibers |
US5497637A (en) * | 1994-03-29 | 1996-03-12 | Ful-Dye, Inc. | Dye bath structure and apparatus for applying dye to textiles |
DE19909380A1 (de) * | 1999-02-16 | 2000-08-17 | Temco Textilmaschkomponent | Verfahren zum Einführen und Anlegen von Garn und Falschdralltexturiereinrichtung |
Also Published As
Publication number | Publication date |
---|---|
WO2004022825A8 (de) | 2005-04-28 |
EP1530656A1 (de) | 2005-05-18 |
DE10238350A1 (de) | 2004-02-26 |
AU2003260411A1 (en) | 2004-03-29 |
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