EP0047911A1 - Procédé et installation pour le lavage en continu de matériaux textiles - Google Patents

Procédé et installation pour le lavage en continu de matériaux textiles Download PDF

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Publication number
EP0047911A1
EP0047911A1 EP81106787A EP81106787A EP0047911A1 EP 0047911 A1 EP0047911 A1 EP 0047911A1 EP 81106787 A EP81106787 A EP 81106787A EP 81106787 A EP81106787 A EP 81106787A EP 0047911 A1 EP0047911 A1 EP 0047911A1
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EP
European Patent Office
Prior art keywords
liquor
washing
countercurrent
textile
textile material
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Withdrawn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
EP81106787A
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German (de)
English (en)
Inventor
Wilhelm Dr. Ruettiger
Franz Suetsch
Albrecht Dr. Wuerz
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.)
BASF SE
Original Assignee
BASF SE
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 BASF SE filed Critical BASF SE
Publication of EP0047911A1 publication Critical patent/EP0047911A1/fr
Withdrawn legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
    • D06B3/00—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating
    • D06B3/10—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating of fabrics
    • D06B3/20—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating of fabrics with means to improve the circulation of the treating material on the surface of the fabric

Definitions

  • the invention relates to an increase in the efficiency of continuous washing treatment of textile materials by suitable liquor management.
  • the washing liquor is guided towards the textile web and repeated liquor exchange on and in the textile goods is ensured.
  • each fleet exchange in the textile web is defined as an individual washing process
  • the continuous washing consists of a sequence of individual washing processes in which the load of the textile goods and that of the washing liquor with the substances to be washed out decreases continuously until the desired washing efficiency is reached. For a given water and energy consumption, the efficiency of the overall continuous washing process depends on how quickly this washing efficiency is achieved.
  • Each individual washing process therefore consists of impregnation and subsequent (of course incomplete) separation of the washing liquor from the textile.
  • the impregnation is usually carried out (in principle, also possible by spraying and splashing) by immersing the textile web in the washing liquor, with deflection rollers and the tension in the goods guide and possibly the usual intensifying devices play a role, and the separation as a rule (in Principle also possible by suction) by squeezing between two rollers.
  • washing compartments must be operated in series within the entire continuous washing system, the compartment walls acting as bulkheads.
  • the object of the invention was to increase the efficiency of continuous washing treatment and to facilitate wastewater treatment or product recovery.
  • the separated fleet runs either into the one immediately preceding it in the direction of travel of the goods or, depending on the construction, partially into it subsequent impregnation bath.
  • the separated liquor is mixed with the washing liquor which comes into contact with the goods first in the impregnation bath located before (or even behind) the separation. So it is washed with a liquor that is more heavily loaded with the substances to be washed out than the liquor that comes from the impregnation section that follows in the direction of the goods.
  • the liquor is separated (squeezed) in such a way that it can be collected as completely as possible.
  • the captured fleet is then fed into the countercurrent, skipping over part of the countercurrent in the direction of incoming goods, at the same concentration as possible.
  • a washing device has a substantially increased level compared to an otherwise identical system which is not equipped according to the invention
  • Capacity in addition, based on equal amounts of laundry, considerable amounts of washing water and the energy for heating them are saved, and finally the wastewater treatment or the recovery of the washed-out substance (e.g. sodium hydroxide solution or size) is facilitated by reducing the wastewater volume or the concentration of the substance to be recovered is increased.
  • the wastewater treatment or the recovery of the washed-out substance e.g. sodium hydroxide solution or size
  • the textile material is fed to the liquor separator during a washing treatment. It depends on the construction of the system, the type of textile, the viscosity of the liquor, the length of the return line (the textile rises, the surface-adhering impregnating liquid runs back in part) and its pitch angle and the running speed are loaded differently with the liquor. If it has a low load of washing liquor, then only a little liquor can be separated off. This is usually favorable for the process according to the invention, since a separation liquor with a higher concentration is then obtained.
  • the washing effect of the squeeze mechanism or the liquor separation point can still be used, but an unnecessarily diluted separation liquor is then obtained.
  • the loading of the textile material with washing liquor is so high that at least 10%, based on the dry weight of the textile material, of the liquor are separated off, and the loading should be as possible do not set higher than up to a separation of 200%.
  • the separation range of 20 to 130% is also in the in most cases the textile and substance-related optimum with regard to the ratio of the concentration of the separation liquor to that of the impregnation liquor and the ratio of the amount of separated to that of the substance to be separated off.
  • the separated fleet "collect as completely as possible” does not necessarily mean to collect as much as technically possible, but only as appropriate under the given circumstances, taking into account all technical and economic aspects.
  • the local arrangement of the separating device is important: the squeezing can (but less cheaply) take place on the ascending textile web as usual, although then the squeezed out Fleet mainly runs back on the textile web (or on the skein or yarn) and its collection requires additional installations (for example wiping lips, baffles, paddle wheels, see FIGS. 1-3). Apart from this, there is a process-technically unfavorable process on the route between the squeeze mechanism and the squeeze liquor collecting device, because the efficiency-reducing mixing of the squeeze liquor running down on the textile material with the impregnation liquor carried along by the textile material takes place.
  • the collection is also carried out safely and completely when the descending textile web is squeezed (FIG. 6), where the fleet to be collected collects in the upper gusset of the crushing unit and can be removed from there (suctioned off if necessary).
  • FIG. 7 It has proven to be particularly advantageous to arrange the separating device close to the next reloading point (FIG. 7). 8 illustrates the principle of the invention.
  • the fleet squeezed on the textile material (1) by the squeeze mechanism (2) runs downwards on the textile material and is discharged into the collecting container (3) through soft lips (4) made of elastic material that rub against the textile material web.
  • the squeeze liquor runs downwards on the textile material (1) and is deflected by rounded guide surfaces (5) pressing against the textile material and directed into the collecting container (3).
  • the pressed-on baffles scrape off more or less excess washing liquor adhering to the textile material, which flows back or drips into the impregnation bath.
  • the fleet squeezed off on the textile goods (1) runs down along the goods and is removed by the paddle wheels (6) lying against the goods. If the pressure is sufficient, the wheels will be taken away by the goods. They can also be powered. The washing liquor then reaches the collecting container (3) by gravity or centrifugal force from the paddle wheels.
  • the washing liquor located on the textile, carried along from bottom to top, is partially mixed and separated with the flowing squeezing liquor before reaching the pinch joint, as a result of which the mixing effect of the squeezing arrangement does not cover all of the fleet elements carried along by the goods so that the optimal degree of efficiency is reached.
  • the return path for the squeeze liquor on the textile and therefore the mixing time will therefore be kept as short as possible by arranging the scraper elements as close as possible under the squeeze mechanism.
  • the washing liquor squeezed from the textile material (1) on the squeeze mechanism (2) runs partly directly along the lower squeeze roller into the collecting container (3) and partly through the textile material or past it laterally into the collecting container.
  • the textile material runs over a deflection roller (7), expediently with a support roller (8), the pressure of which can be used to set the fleet length carried along by the textile material within certain limits.
  • the squeeze liquor drips partly from the lower squeeze roller (2) and partly from the textile material to the lower deflection roller (7).
  • the complete collection of the squeeze liquor therefore requires no further installations apart from the collection container (3).
  • the distance between the lower deflecting roller and the squeezing mechanism should be as short as possible in view of the undesirable mixing of the squeezing liquor and the impregnating liquor carried along by the textile material on this route.
  • the textile material (1) coming from the impregnation bath is deflected by a deflecting roller (7), which is arranged higher than the squeeze mechanism (2), and is guided into the squeeze mechanism from above, whereby, as in FIG. can use a second deflecting roller to introduce the textile material symmetrically (vertically).
  • the first deflecting roller can in turn (as in FIG. 4) be provided with a support roller (8).
  • the squeeze liquor collecting in the upper gusset (9) can be discharged according to known principles, e.g. by overflow on both side gusset ends. These can be completely open so that the squeeze liquor flows into a collecting vessel located under the roller ends. They can also be closed by pressed sealing plates with a drain opening and possibly connected pipeline. In addition, or exclusively, the squeeze liquor can be sucked off through suction nozzles (10) which dip into the gusset from above.
  • the textile material runs in a classic roller skid over the upper deflection rollers (7) into squeeze units (2) arranged as close as possible to the surface of the impregnation baths (11), from whose upper gusset (9) the squeeze liquor is removed, if necessary suctioned off (suction nozzle (10 This ensures a maximum dwell time for the mass transfer of textile washing liquor on the goods, while the largely washing-ineffective dwell time of the squeezed goods is minimized.
  • the washing-ineffective dwell time of the squeezed goods in the system is also practically possible to have the washing-ineffective dwell time of the squeezed goods in the system to zero if the goods are run vertically from below through the squeezer, e.g. according to one of Figs. 1 to 3 or a corresponding variant of Fig. 5, and the upper gusset of each squeezer instead of the normal impregnation baths as in Use the next impregnation bath direction by filling it with wash liquor (more or less).
  • the squeezing liquor must then be pumped into an upper gusset of the same concentration as possible, and the liquor countercurrent is also pumped from gusset to gusset.
  • the squeeze rollers are then expediently provided with fleet wipers at the uppermost point.
  • the horizontal goods guidance on the squeezing mechanism (according to FIG. 4) was chosen because of the easier representation in the sketch.
  • the goods guidance from above (according to FIG. 6) is preferred, the squeezing units being arranged particularly advantageously (according to FIG. 7) closely above the surface of the impregnation baths.
  • a fleet separation point with "accessories" (3), (13), (14) according to the invention belongs to each (in practice, for reasons of space, every second) section of the washing compartment.
  • the squeeze fleet of the squeeze unit which belongs to the first section in the direction of the goods flow (impregnation bath), can of course not be “fed into the counterflow by skipping a part of the counterflow in the direction of the goods inlet at the same concentration as possible", but as the highly concentrated fleet of the overall process it represents " End product "represents and - possibly along with the (somewhat less concentrated) overflow (16) of the first section in the direction of the goods movement - is fed for further recycling (eg reuse) or processing.
  • a partial aim of the invention is to reduce the water consumption and thus the amount of wastewater or the volume of the solution of washed-out and recoverable substance. It can therefore happen that the textile web carries more fleet volume than (in the direction of travel) fresh water is fed in at the end.
  • the impregnation baths (which may be initially filled) run practically empty more or less quickly.
  • the countercurrent then only exists in the separation liquor collected and fed in according to the invention. Decisive for the concentration inequality of the one-ice point is then the concentration of the liquor adhering to the textile material, as there z.3. would drip off or be obtained by loosely wiping off without any contact pressure and without any squeezing effect can be.
  • the separated liquor is then fed into an impregnation bath which is adjacent to this point.
  • the method and the device according to the invention can be adapted to practically all occurring tasks for the continuous washing treatment of textile materials.
  • the textile material is run as a web, as a strand or as a yarn, whether detergents (detergents, complexing agents, so-called “builders”) or other auxiliaries (eg corrosion and foam inhibitors, stabilizers, enzymes) are used be or not, whether it is heated or not, whether the substances to be washed off the textile goods should be used again or not.
  • detergents detergents, complexing agents, so-called “builders”
  • auxiliaries eg corrosion and foam inhibitors, stabilizers, enzymes
  • the inventive method is suitable except for pure washing processes (solution wash, Dispergierüsche) including washing treatments in which chemical reactions and / or physical-chemical processes take place, for example, neutralization, reduction, Banlungsvor g ength (Texturier mental, bunching), thermal treatments, Farbstoffixier and authenticity improvement processes, stretching and J Fiber fixing treatments, that is to say for all finishing processes which are coupled with a washing process, ie a separation of certain substances from the textile material.
  • solution wash, Dispergier ⁇ sche washing treatments in which chemical reactions and / or physical-chemical processes take place, for example, neutralization, reduction, Banlungsvor g ength (Texturier mental, bunching), thermal treatments, Farbstoffixier and authenticity improvement processes, stretching and J Fiber fixing treatments, that is to say for all finishing processes which are coupled with a washing process, ie a separation of certain substances from the textile material.
  • a universally usable washing device will have numerous connecting pieces for the return of the squeezing liquor into the countercurrent at the same concentration point as possible, so that depending on where in the washing process just carried out the same concentration point, the connecting line can be connected accordingly.
  • a device according to the invention provided for a very special washing process requires only a few or only a single connecting piece for one (possibly permanently installed) connecting line. It is also possible to install a valve cascade in connection with a concentration measuring device and thus ensure that only the valve at the most similar concentration point opens automatically in the event of local / temporal concentration fluctuations in countercurrent.
  • the liquor separation device can consist of a suction slit, a suction drum and preferably a squeeze mechanism.
  • the fleet collecting device can e.g. a collecting trough in connection with a collecting container, but it can also be, as mentioned, the upper gusset in the horizontal squeeze mechanism on the descending textile web, also of course in connection with a collecting container and if necessary with installations for suctioning the squeezing liquor from the gusset into the collecting container.
  • the connecting line to the point of equal concentration in countercurrent can be a pipe, a channel or a hose, with or without a pump unit.
  • a terrycloth fabric of just under 300 g / m 2 was loaded with a chemical liquor containing 40 g sodium hydroxide and 45 g hydrosulfite (sodium dithionite) per liter for a dark blue color with vat dyes and steamed to fix the dye. After leaving the water lock, the product still contained 24 g / kg of sodium hydroxide (determined by titration).
  • the washing out of the alkali up to the oxidation was then followed once according to the prior art and secondly according to the invention.
  • the running speed was 25 m / min in each case.
  • the alkali was washed out with 15 l of water per kg of textile material in 2 compartments, each consisting of 5 sections separated by bulkheads and a squeezer behind the 5th section.
  • the residual load of the goods was 1.3 to 1.4 g sodium hydroxide per kg textile. It was worked in countercurrent.
  • the wash liquor flow from the back to the front wash compartment (in the direction of travel) usually had a concentration of 0.5 g NaOH per liter.
  • the waste water had an alkali concentration of 1.5 g / l.
  • the 15 l / kg textile goods fed in as fresh water were found completely again.
  • the washing efficiency was 95%, which resulted in safe production for the article.
  • the wash liquor running from the last compartment contained 0.7 to 0.8 g NaOH per liter. This fleet arrived on the terry goods in the last sector before the first washing compartment was squeezed. The washing liquor separated off on this squeezer had a concentration of 9 g NaOH per liter. It was treated separately.
  • the wastewater (which was taken from the first section of the first washing compartment in the direction of travel) was produced in an amount of 7 l / kg of textile material and had a loading of 2 g of NaOH per liter.
  • the deflecting rollers were raised in front of the squeezing mechanism, so that a textile material inlet inclined by approximately 10 ° from top to bottom was created.
  • the originally available discharge plate which led the fleet back into the washing compartment in the prior art, was replaced in each case by a collecting tray made of rust-free sheet metal, on which there was a 2-inch threaded connector for the fleet drain.
  • a metal hose with a Teflon inner lining was connected to this, in order to remove the fleet separated on the crushing unit by gravity from the high-lying crushing units to the feed points.
  • the separated washing liquor was fed into the countercurrent at the same concentration point.
  • the individual separated fleets were ironed in by skipping part of the countercurrent according to the following scheme:
  • the fleet carried by the goods to the crushing plant was approximately 170% in each case.
  • the flow from the individual washing compartments averaged 4.2 m 3 / h.
  • the waste water from the plant had an alkali load of between 12 and 15 g NaOH per liter. It was combined with the other company wastewater because the concentration was too low for a targeted individual treatment and the quantity was too high. In contrast, a separate treatment was worthwhile for the strongly alkaline liquor (20.8 g NaOH per liter, 2.1 m 3 / h), which was separated off in the first crushing unit.
  • a raw material was desized in a pilot plant with a working width of 0.5 m, which had a size coating of 50 g of the ammonium salt of an acrylic acid polymer per kg of textile material.
  • the system consisted of two washing compartments, each with a total pull-in length of 6 m, divided into 4 sections, and 2 squeezing units, which stood separately directly behind the associated washing compartments.
  • the speed of the goods was 10 m / min.
  • the wet and pre-swollen incoming goods were desized after counter-current operation at a liquor temperature of 60 ° C. with 2 l / kg of fresh water additive in order to reuse the size.
  • the washing compartments were only filled with water until the lower rollers were covered. 2.2 l of regenerated liquor were obtained per kg of textile material passed through.
  • the size concentration in the L was Average 16 g / 1 of polyacrylate (solid substance).
  • the washing effect which corresponds to the recovery yield, was around 70% as a permanent value.
  • the separated from the second squeezing Schlichtewaschf ott l e 7 g / l of the washing compartment 2 is fed into the 1st section, namely at the input side of the meander - fleet counter-current.
  • the amount of regrind produced was 1.2 l per kg of product passing through and had an average concentration of 29 g size per liter, so that about 35 g size was recovered per kg product, i.e. the recovery yield has not decreased, although, due to the reduced amount of washing water by half, the concentration of size in the regenerated liquor has increased significantly (29 g / 1 instead of 16 g / l).
  • the size regeneration fleet had to be reduced to 58 g / l in order to be used again. Only at this size concentration can you increase the required size concentration of 75 to 80 g / l with commercially available fresh acrylate size solution without creating a fleet excess.
  • the method according to the invention thus saves considerable amounts of energy when concentrating the regenerated liquor.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
EP81106787A 1980-09-11 1981-08-31 Procédé et installation pour le lavage en continu de matériaux textiles Withdrawn EP0047911A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803034220 DE3034220A1 (de) 1980-09-11 1980-09-11 Verfahren und vorrichtung zur kontinuierlichen waschbehandlung von textilmaterialien
DE3034220 1980-09-11

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EP0047911A1 true EP0047911A1 (fr) 1982-03-24

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EP81106787A Withdrawn EP0047911A1 (fr) 1980-09-11 1981-08-31 Procédé et installation pour le lavage en continu de matériaux textiles

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4834851A (en) * 1986-10-22 1989-05-30 S.E.R.E. S.R.L. Permanent anode
US5407269A (en) * 1992-07-09 1995-04-18 International Business Machine Corporation Dynamic mixing chamber
US6069996A (en) * 1995-01-26 2000-05-30 Timm; Eberhard Device for heating a drinkable liquid

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3381506A (en) * 1966-08-19 1968-05-07 Du Pont Liquid-stripper bar
US3426554A (en) * 1964-03-13 1969-02-11 Krantz H Apparatus for bleaching
US3675621A (en) * 1970-07-24 1972-07-11 Goodyear Tire & Rubber Device for removing excess liquid coating from a moving fabric
DE2425374A1 (de) * 1974-05-25 1975-12-04 Artos Meier Windhorst Kg Verfahren und vorrichtung zur nassbehandlung, insbesondere zum waschen von laufenden warenbahnen
DE2518770A1 (de) * 1975-04-28 1976-11-11 Vepa Ag Nassbehandlungsvorrichtung fuer endlosmaterial
DE2527734A1 (de) * 1975-06-21 1977-01-13 Vepa Ag Verfahren und vorrichtung zum nassbehandeln von auf laengszug zu beanspruchenden waren
DE2820471A1 (de) * 1978-05-10 1979-11-15 Cilander Ag Verfahren und einrichtung zum kontinuierlichen nassbehandeln von strangfoermigem textilgut

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3426554A (en) * 1964-03-13 1969-02-11 Krantz H Apparatus for bleaching
US3381506A (en) * 1966-08-19 1968-05-07 Du Pont Liquid-stripper bar
US3675621A (en) * 1970-07-24 1972-07-11 Goodyear Tire & Rubber Device for removing excess liquid coating from a moving fabric
DE2425374A1 (de) * 1974-05-25 1975-12-04 Artos Meier Windhorst Kg Verfahren und vorrichtung zur nassbehandlung, insbesondere zum waschen von laufenden warenbahnen
FR2272214A1 (fr) * 1974-05-25 1975-12-19 Meier Windhorst Christian A
DE2518770A1 (de) * 1975-04-28 1976-11-11 Vepa Ag Nassbehandlungsvorrichtung fuer endlosmaterial
DE2527734A1 (de) * 1975-06-21 1977-01-13 Vepa Ag Verfahren und vorrichtung zum nassbehandeln von auf laengszug zu beanspruchenden waren
DE2820471A1 (de) * 1978-05-10 1979-11-15 Cilander Ag Verfahren und einrichtung zum kontinuierlichen nassbehandeln von strangfoermigem textilgut
FR2425493A1 (fr) * 1978-05-10 1979-12-07 Cilander Ag Procede et dispositif de traitement au mouille en continu de produits textiles ininterrompus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4834851A (en) * 1986-10-22 1989-05-30 S.E.R.E. S.R.L. Permanent anode
US5407269A (en) * 1992-07-09 1995-04-18 International Business Machine Corporation Dynamic mixing chamber
US6069996A (en) * 1995-01-26 2000-05-30 Timm; Eberhard Device for heating a drinkable liquid

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DE3034220A1 (de) 1982-04-22

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