EP1526203B1 - Method and device for rinsing fabric in roped form - Google Patents

Description

In the wet treatment of strand-like textile material on JET treatment machines, for example on JET Stückfärbemaschinen, the textile material is in the form of an endless strand of goods in a closed container by means of a transport nozzle system in the form of a JET nozzle circulated, which is acted upon by a transport medium flow, which gives the product strand its advancing movement in the predetermined direction of circulation. In many machines, the transport medium is a treatment liquor that can be admixed with additives depending on the process and that can be brought to different temperatures during the course of the process.

In any such wet finishing process, rinses are required in which substances having an affinity for, in, or adhered to the textile fabric must be rinsed away after they have been self-primed, such as desizing, bleaching, washing, saponifying, etc first or simultaneously with the rinsing process in solution, emulsion, or dispersion. For example, from the EP 1241289 A1 is a jet dyeing machine according to the aerodynamic principle known, in which the transport of the endless warp rope through Venturi transport nozzles takes place, which takes place with a gaseous transport medium. On the product flow path, a washing / rinsing nozzle is arranged in the area in front of a guide roller introducing the product strand into the transport nozzles, which allows heated rinsing water to be sprayed onto the circulating goods strand in order to clean or rinse it.

For rinsing the textile product, which is precisely a dilution process in the course of which the concentration of the dirt particles to be flushed away in the rinsing liquid is lowered, essentially three different procedures are used in practice. This is explained in eg Melliand Textile Reports 6/1997, pages 428 to 433 :

In the so-called batch rinsing, a rinsing liquid bath is introduced into the container, the product strand is circulated, and after a predetermined number of product strand circulations, the rinsing agent bath is drained off again. This results in a mixing of the dirt-laden treatment liquor on the product with the rinsing liquid in the rinsing liquid bath. After a few bath changes, the desired wash result is achieved.

In another approach, purging occurs between two different levels of rinse liquid in the container. The circulation movement of the goods strand is not interrupted during the flushing process by a filling and draining the treatment liquid. Instead, the rinsing fluid is circulated through a circulating pump, usually the liquor pump, during the treatment period, maintaining a rinsing fluid level between an upper and a lower level by appropriate control of the rinsing fluid inlet into the reservoir and rinse fluid out of the reservoir in the reservoir (the minimum level for proper operation of the circulation pump) commutes. The flushing success can be determined similar to the batch flushing by determining the dirt load of the flushing flushing liquid.

A third procedure is finally rinsing in the overflow. In this case, when circulating goods strand of the dirt-laden treatment liquor contained in the container continuously flushing fluid, usually water, fed while the excess diluted by the rinsing liquid treatment liquor is continuously discharged at a certain level by an overflow pipe. The washing success results here by a continuous dilution of the treatment bath; it can be determined by appropriate monitoring of the effluent over the overflow line, increasingly diluted treatment liquor.

Of these rinse procedures, batch rinse and rinsing between two different levels most efficiently, in terms of rinse liquor consumption, ie, typically water consumption. Due to the principle, the rinsing liquid consumption during overflow rinsing is highest, so that this rinsing procedure is inefficient with regard to the rinsing liquid consumption.

The water consumption of a dyeing machine is in many industrialized countries an essential criterion for the efficiency of a wet refining process. The economy is also u.a. influenced by the purging time, which depends on the respective predetermined rinsing effect. Relatively long flushing times result in correspondingly long overall treatment times and thus limit the product throughput that can be achieved on the machine. See, e.g. J.H. Heetjans, Thies GmbH & Co., Coesfeld, Germany, Optimizing the batch dyeing process using new rinsing procedures.

Since, in a nozzle treatment machine of this type, even when rinsing, the drive of the endless product strand is effected hydraulically by the liquor flow impinging the transport nozzle, the rinsing liquid quantity required per unit of time is greatly dependent on the quantity of liquid required for driving the commodity strand, irrespective of the rinsing method used. In other words, it requires a considerable amount of rinsing liquid, ie rinsing water, as a rule, to simply drive the flow of goods. Although it has already been attempted (see Melliand Textilberichte aO) to dispense with the rinsing process on the drive of the goods strand through the recirculation pump circulated by the fleet and drive the strand of material thereby that only fresh rinse water is introduced as a transport medium in the JET nozzle with this to accomplish both the rinsing and the material transport, but such a procedure is very uneconomical because of the high flushing water requirement and the poor fluid exchange between the nozzle flowing through fresh rinse water and the entrained by the fabric strand dirt-laden treatment.

The object of the invention is therefore to provide a rinsing process for stranded textile on JET treatment machines, which allows the rinsing liquid consumption, i. As a rule, to keep the rinse water consumption and the time required to carry out the rinsing process low and match each other according to the prevailing circumstances so that the production costs for the entire, a rinsing process requiring wet finishing process can be minimized.

To solve this problem, the inventive method has the features of claim 1. An apparatus for carrying out this method is the subject of claim 17.

The invention is based on the recognition that in JET treatment machines according to the aerodynamic principle, the transport of the endless fabric strand of the treatment liquor is independent, because the strand of goods by applying the Venturi transport nozzle with a gaseous transport medium, if necessary. Supported by a foreign driven Coiler takes place and therefore there are new possibilities for rinsing the goods.

In the new method for rinsing strand-like textile material, the procedure is accordingly such that the textile material in the form of an endless product strand is circulated by means of a Venturi transport nozzle in a closed container through a gaseous transport medium. The textile material is exposed to the action of a rinsing liquid, such that the rinsing is carried out with continuously flowing rinsing liquid. In this case, the rinsing liquid application per unit of time and / or the goods flow rate depending on goods-specific data of the textile material, controlled by machine-specific data and process-specific data appropriately. The dirt-laden rinsing liquid emerging from the transport nozzle is removed from the container.

Practically, this means, for example, fresh rinse water directly from a water pipe, if necessary. Via a pump and a heat exchanger in the goods flow path before and / or in the transport nozzle and / or applied after this in the manner described on the goods. The drained, flushed rinse water is then drained immediately. It is thereby achieved that, compared to the conditions in the hydraulic JET treatment machine explained in the introduction, a substantially reduced amount of flushing water is required, while at the same time the flushing time can be shortened.

This opens up the possibility of optimizing the rinsing liquid consumption per unit of time and the rinsing time, depending on predetermined criteria. In a particularly advantageous embodiment of the new method, this can be done in such a way that from goods specific data of the textile, eg. Weight, substrate and presentation of the fabric strand, from design data of the transport nozzle, such as nozzle diameter, nozzle length, etc., and treatment-specific data, such as the speed of circulation of the product strand and the like, a calculation model is determined, which maps the rinsing process and its success. The control of the Spülflüssigkeitsdurchsatzes per unit time by the transport nozzle and the goods strand circulation speed is performed by a computer in response to this predetermined computing model.

The calculation model can be updated by data recorded during the flushing process. Apart from that, the calculation model can be compared and calibrated by simple tests with the data obtained in the practical rinsing operation.

In practice, the success of a rinse is determined either with a dyeing feel or by simple manual tests. These tests can eg in the wringing of a strand and the catching of the dripping Water to determine the residual color. Another possibility is, for example, the measurement of the pH value or of the electrical conductance of the dirt-laden draining rinsing liquid. These tests are usually performed directly on the machine, either by removing the fleet or stopping the machine. In the case of finished wet-treated (finished) goods, standardized quality controls (rubbing fastness, washfastness, perspiration fastness, etc.) are usually carried out, which are spread worldwide and whose results are also comparable with each other.

The inventive method, in which a direct rinsing of the product with rinsing liquid, can now be designed so that the success of the rinsing process is monitored continuously or at intervals on-line. The data thus determined, which characterize the respective washing success, can flow into the controller and, in particular, into the computer model in order to automatically change the rinsing process or to determine the end of the rinsing process. Changes in the rinsing process may, for example, be done in such a way that the rinsing liquid application to the product strand at the beginning of the rinsing process, i. in the first rounds of the strand is different, especially higher than towards the end of the rinsing process.

• Sensoren zur pH-Wert Messung der schmutzbeladenen Spülflüssigkeit für das Ausspülen von Säuren und Laugen,
• Sensoren zur Messung des elektrischen Leitwerts der schmutzbeladenen Spülflüssigkeit für das Ausspülen von Salzen,
• Trübungssensoren für die Messung der Restfarbigkeit in der schmutzbeladenen Spülflüssigkeit.

Since in the new rinsing process a direct rinsing of the goods takes place in the rinsing liquid flowing through the container, the dirt load of the rinsing liquid loaded with dirt is a measure of the rinsing effect achieved. For example, the following sensors can be used to measure this dirt load:

• Sensors for pH measurement of dirt-loaded rinsing fluid for rinsing acids and alkalis,
• Sensors for measuring the electrical conductance of the dirt-laden rinsing liquid for rinsing salts,
• Turbidity sensors for the measurement of residual color in the dirt-loaded rinse liquid.

The contamination load can be measured in the rinsing water draining out of the container and / or directly on the rope.

• ein vorgegebener absoluter Messwert wenigstens einer für die Schmutzlast des schmutzbeladenen Spülflüssigkeit kennzeichnenden Größe, bspw. deren Trübung, elektrischer Leitwert, pH-Wert und dergleichen,
• ein vorgegebenes Verhältnis zwischen einem Anfangs- und einem Endwert wenigstens einer für die Schmutzlast der schmutzbeladenen Flüssigkeit kennzeichnenden Größe
• die zeitliche Änderung einer für die Schmutzlast kennzeichnenden Größe der schmutzbeladenen Spülflüssigkeit.
• Durch die erste zeitliche Ableitung des Messwerts dieser Größe wird die Frage beantwortet um wieviel sich der Messwert pro gegebene Zeiteinheit verändert. Nachdem alle Spülvorgänge, graphisch gesehen, in einer sich abflachenden Kurve enden, die anzeigt, dass sich die Schmutzpartikelkonzentration mit fortschreitender Spülzeit kaum mehr ändert, kann auch die erste Ableitung des erwähnten Messwerts als Kriterium für das Ende der Spülzeit dienen.

To determine the end of the purge time, the following may be used, among others, the following criteria measured by corresponding sensors and / or calculated by the computer:

• a predetermined absolute measured value of at least one variable characterizing the dirt load of the dirt-laden rinsing liquid, for example its turbidity, electrical conductance, pH value and the like,
• a predetermined ratio between an initial and a final value of at least one of the dirt load of the dirt-laden liquid characterizing size
• the change with time of a size of the dirt-loaded rinsing liquid that characterizes the dirt load.
• By the first temporal derivative of the measured value of this variable, the question is answered by how much the measured value per given time unit changed. After all rinses, graphically, terminate in a flattening curve indicating that the soil particle concentration hardly changes any more as the rinse time progresses, the first derivative of the noted measurement may also serve as the end rinse time criterion.

The combination of theoretically calculated values and practically measured values in the mentioned calculation model allows a further optimization of the rinsing process. It is conceivable, for example, that at the beginning of the rinsing process, where a large concentration drop is rapidly achieved with high quantities of rinsing liquid, the rinsing time is optimized. Towards the end of the flushing process, when the concentration differences in the dirt-laden effluent flushing liquid from product circulation to product circulation are no longer particularly great, it is advantageous to work with a smaller amount of flushing liquid but with a somewhat higher expenditure of time. The result is in any case a flushing process that is optimized both in terms of the required Spülflüssigkeitsmenge and with respect to the required flushing time.

This optimization is in practical wet treatment operation, ie in the dyeing of great economic importance. For example, in certain industrialized countries, the dye works usually operate with relatively low production and high water costs, while in other countries there is high production and very low water costs. There are also areas in which the process water is assigned to the dye works, and thus an increase in production is only possible if the constantly allocated amount of water, a higher production and thus a higher yield can be achieved.

The method according to the invention makes it possible, with knowledge of the data required for the rinsing process, to optimize the rinsing process. In particular, using the computer model, the controller itself can calculate the water consumption or the required production time depending on the respective existing production conditions, such as water price, production volume and the like. From the operator or programmer of the wet treatment machine, the controller only needs to specify whether the rinsing process should be optimized in terms of water consumption or production time.

Further embodiments of the method according to the invention are the subject of subclaims. They also emerge from the following description of an embodiment of the method according to the invention which is illustrated by the following drawing.

Fig. 1

eine JET-Behandlungsmaschine nach dem aerodyna- mischen Prinzip, eingerichtet zur Durchführung des erfindungsgemäßen Spülverfahrens, in schema- tischer Darstellung und im Querschnitt,

Fig. 2

ein Diagramm zur Veranschaulichung des Konzen- trationsabfalls der Schmutzlast in dem schmutzbe- ladenen Spülwasser bei der Durchführung des er- findungsgemäßen Spülverfahrens in Abhängigkeit von der Zahl der Warenstrangumläufe, unter Ver- anschaulichung der Übereinstimmung zwischen ge- messenen und berechneten Konzentrationswerten ,

Fig. 3 und 4

zwei Diagramme zur Veranschaulichung der Spülzeit und des Wasserverbrauchs in Abhängigkeit von der in die Transportdüse injizierten Spülwassermenge und der Umlaufgeschwindigkeit des Warenstrangs bei Verwendung des erfindungsgemäßen Verfahrens und

Fig. 5

ein Diagramm zur Veranschaulichung des gegenläu- figen Verlaufs der Spülzeit und des Wasserver- brauchs bei der Durchführung des erfindungsgemä- ßen Spülverfahrens.

In the drawing show:

Fig. 1

1 shows a JET treatment machine according to the aerodynamic principle, designed for carrying out the rinsing method according to the invention, in a schematic representation and in cross-section,

Fig. 2

a diagram illustrating the concentration decrease of the dirt load in the dirty rinse water in carrying out the inventive rinsing method as a function of the number of product strand circulations, showing the correspondence between measured and calculated concentration values,

3 and 4

two diagrams illustrating the purge time and the water consumption as a function of the amount of flushing water injected into the transport nozzle and the rotational speed of the product strand when using the method according to the invention and

Fig. 5

a diagram illustrating the opposite course of the rinsing time and the water consumption in carrying out the inventive rinsing method.

In the FIG. 1 schematically represented high temperature (HT) -Stückfärbemaschine has a pressure-resistant, cylindrical container 1, in which a closable by a cover 2 operating opening 3, through which a strand of goods 4 can be introduced. The product strand 4 is introduced via a foreign-driven reel 5 in a Venturi transport nozzle 6, to which a Abtafler 7 connects. The Abtafler 7 sets the emerging from the transport nozzle 6 strand of goods 4 in a store 8 from which the endless strand of goods through the reel 5 is pulled out again. The reel 5 and the transport nozzle 6 are housed in housing parts 9, which are liquid-tightly connected to the container 1. The product strand 4 was connected after insertion through the operating opening 3 at its ends to an endless loop of goods.

The transport nozzle 6 is acted upon by a gaseous transport medium flow, which causes the continuous strand of goods 4 in a direction indicated by an arrow 10 circulating in circulation. The transport medium in the present case is air or a vapor-air mixture, which is sucked out of the container 1 by a blower 11 and a suction line 12 and conveyed via a pressure line 13 into the transport nozzle 6.

At the bottom of the container 1 a liquor drain 14 is arranged, which contains a float screen 15 and which is connected to a suction line 16 of a liquor circulating pump 17, the pressure line 18 includes a heat exchanger 19 and opens via a control valve 20 in the transport nozzle 6. The liquor circulating pump 17 makes it possible to circulate liquor drawn in from the container 1 via the transport nozzle 6 and the container 1. Parallel to the heat exchanger 19 and the liquor circulating pump is a bypass line 22 which contains a shut-off valve 23 and connects the liquor drain 14 with the pressure line 21.

Finally, an additive container 24 is provided which contains a chemical additive in aqueous solution, emulsion or dispersion, which can be fed via an additive pump 25 and a connecting line 26 into the suction line 16 of the liquor circulating pump 17.

The extent described, working on the aerodynamic principle piece dyeing machine is known per se. If it is necessary in the course of a treatment process to rinse the product strand 4, the procedure is as follows:

A drain valve 27 of the liquor drain 14 and an inlet valve 28 in the suction pipe 16 of the liquor circulating pump 17 are opened. Rinse water flows into the suction line 16 via the inlet valve 28, as indicated by an arrow 29. The inflowing rinse water may optionally be added to the flushing facilitating or supporting additives from the additional tank 24 and brought in the heat exchanger 19 to a suitable rinsing temperature before it enters the transport nozzle 6.

The fan 11 is turned on and promotes a via the lines 12, 13, the transport nozzle 6 and the container 1 circulating transport air flow, which drives the product strand 4 in the direction of rotation 10.

The entering into the transport nozzle 6 rinse water is applied in the transport nozzle 6 on the product forming the fabric strand. The withdrawn from the reel 5 from the storage 8 goods strand 4 is soaked in dirt entering the transport nozzle 6, which is introduced through the strand of goods in the transport nozzle 6. In the transport nozzle 6, the liquor loaded with dirt liquor, which passes through the goods strand in the transport nozzle and the supplied through the injection via the pressure line 21 flushing water quantity.

The dirt-laden rinse water emerging from the transport nozzle 6 is collected in the container 1 and then drained via the liquor drain 14 and the drain valve 27, as indicated by an arrow 30. The suction line 16 is shut off by a shut-off valve 31 against the suction side of the liquor circulating pump 17.

As the number of revolutions of the product strand 4 increases, the dirt-laden liquor contained in it is increasingly thinned out by the rinsing water injected via the transport nozzle 6, until finally the respective desired washing success has occurred. The entry of this Spülfolges can be determined by sensor means 32 on-line, which are flowed through by the outflowing from the container 1 dirt-laden rinse water. The sensor means 32 monitor, for example, the pH, the electrical conductance and the turbidity of the effluent rinse water and give corresponding characteristic of these variables electrical signals as data in a computer 33 of the control one.

Once the desired rinsing effect has been achieved, the supply is switched off again and the piece dyeing machine is set up for the next wet treatment step.

During the rinsing process, the product strand is driven by the air flow conveyed by the blower 11, regardless of the amount of flushing water injected. By appropriate control of the fan 11, the rotational speed of the product strand 4 can be changed continuously, while the control valve 20 allows to change the per unit time injected flushing water quantity, controlled by a computer 33.

Alternatively or additionally, the rotational speed of the product strand 4 can also be changed by the computer 33 controlling a throttle valve 340 located downstream of the blower 11 and located in the pressure line 13. The injected amount of flushing water can also be changed by a control intervention on the circulating pump 17, as shown in FIG FIG. 1 is indicated.

The introduced with the product strand 4 in the transport nozzle 6 amount of dirt-laden liquor depends essentially on factors such as weight, substrate and presentation of the fabric strand 4. It is calculated how many liters of liquid the strand of goods can absorb. The amount of liquid actually absorbed in relation to the weight set results in the so-called "pick-up". In addition, it is dependent on the speed of the goods strand 4. The introduced with the product strand in the transport nozzle 6 dirt-laden fleet quantity depends namely directly on the rotational speed of the strand of goods.

Building on these insights, a computer model can be developed that reflects the success of purging. This calculation model can be compared and calibrated by tests with the practical conditions. FIG. 2 shows the result of such comparison experiments between the theoretical calculation and the actual measured values.

Plotted is the concentration of dirt in grams per liter in the running out of the liquor outlet 14 dirt-laden rinse water as a function of the number of revolutions of the strand 4. The two curves show that the concentration drops steeply during the first rounds of the strand of goods and with increasing number of Stall circulation asymptotically approaches a minimum residual value. The correspondence between the calculation and the actual measurement is clearly good.

With the calculation model obtained in this way, the parameters for the flushing process can be optimized in simulation calculations. The result of these calculations is for an embodiment in the FIGS. 3 to 5 illustrated.

That the FIGS. 3 to 5 underlying embodiment applies to a cotton knit fabric with an average grammage of 250gr / m ² and with the following parameters: Pick up (%) 330 Loading storage (Kg) 200 Initial dirt load (gr / ltr) 35 Residual dirt load at end of flushing time (gr / ltr) 3

This results in the following values for the rinsing time in minutes and for the rinse water consumption in liters per kilogram, which are shown in the graphs of the FIGS. 3, 4 graphic are illustrated, which represent the percentage change based on a particular machine setting.

These values and the graphs after FIG. 3, 4 show that the rinsing time can be significantly reduced by changing the rinse water supply and that on the other hand, the rinse water consumption can be reduced by extending the rinsing times. Incidentally, when the machine is under-loaded, the rinsing time automatically decreases.

Out FIG. 5 It can be seen that with decreasing rinse time, the rinse water consumption increases to achieve a certain predetermined rinsing effect. In the first (left) third, the required rinsing time drops off very sharply. In the last (right) third of the rinse water consumption increases very much, although the rinse time drops only slightly. The optimum operating range is therefore in the middle third, in which the flushing time can be significantly reduced with almost constant flushing water consumption.

The values given in Tables 1, 2 show that by varying the amount of flushing water per unit time (injection amount) and the rate of flow of the product as indicated by the dark fields of the table, e.g. a time saving of 75% can be achieved, while at the same time the required amount of flushing water only increases by 38%.

The illustrated embodiment shows that at low Spülwasserkosten at the expense of increased Spülwasserverbrauchs the amount of goods produced and the yield can be significantly increased because the flushing time is shortened, while high Spülwasserkosten by extending the flushing time and, therefore, by using additional machine capacity Cost can be significantly reduced.

In the above description, it has been generally referred to as "rinsing liquid" which, as indicated, is typically rinse water. In principle, however, it is also possible to use other rinsing liquids, including those of organic type, if this is useful with regard to the textile product to be rinsed.

In the embodiment described above the rinsing liquid is injected into the transport nozzle 6 ( FIG. 1 ) and thus applied to the fabric strand 4. Alternatively or additionally, however, the new rinsing method can also be carried out in such a way that the rinsing liquid is applied to the product strand 4 in the course of the goods flow and / or after the transport nozzle 6. This is in FIG. 1 illustrated schematically by way of example. In the housing 9 opens above the reel 5 a example. From the pressure line 21 outgoing rinsing fluid line 34, in which a control valve 35 is located, which can be controlled by the computer 33. This ensures that the entering into the transport nozzle 6 strand of goods is already loaded with flushing liquid.

The line 34 does not necessarily need to open in the area above the reel 5. Depending on the particular circumstances, the mouth of the conduit 34 may be located somewhere between the reel and the nozzle gap of the Venturi transport nozzle 6. In addition, embodiments are also conceivable in which the mouth of the conduit 34 is in the lying between the memory 8 and the reel 5 (vertical) runway region of the fabric strand 4 and rinsing liquid is already applied to the fabric strand 4 before it reaches the reel 5. In Fig. 1 this variant is indicated by a dot-dash line, which represents a pressure line 34a in which a control valve 35a is located, which can also be controlled by the computer 33.

In addition, can be provided for rinsing liquid on the fabric strand 4 and an opening in Warenstranglaufweg behind the transport nozzle 6 pressure line 36 which, for example, branches off from the pressure line 21 and contains a control valve 37 which is controlled by the computer 33. In this way, it is possible behind the transport nozzle flushing either alternatively or additionally on the strand 4 give up.

The running of the product strand 4 dirt-laden rinsing liquid is collected in the container 1 and drained via the sump and the drain valve 27. Alternatively, however, it is also possible to proceed in such a way that the dirt-laden rinsing liquid is removed from the container in batches, i. the rinse liquid is collected in the container for later reuse.

Finally, it should be mentioned that the sensor means 32, which detect the entry of the washing success, do not necessarily have to be arranged behind the discharge valve 27 in order to monitor the draining, soiled, rinsing liquid. The measurement or determination of the dirty load characterizing data can also be done directly on the product strand 4.

Claims (23)

1. Method for rinsing textile fabric in rope form on JET treatment machines, in which

   • the textile fabric in the form of a continuous rope (4) is caused to circulate through a venturi transport tube (6) in a container (1) by means of a gaseous transport medium,

   • during this, rinsing is conducted with rinsing fluid applied to the goods in rope form before and/or in and/or after the transport nozzle (6) in the running direction of the goods in rope form, wherein the application of rinsing fluid is controlled per unit time and/or the rotational speed of the goods in rope form is controlled in dependence on goods-specific data of the textile fabric and/or machine-specific and/or process-specific data and the dirt-laden rinsing fluid is discharged from the container.
2. Method according to claim 1, characterised in that the dirt-laden rinsing fluid is discharged continuously from the container (1).
3. Method according to claim 1, characterised in that the dirt-laden rinsing fluid is discharged in batches from the container (1).
4. Method according to one of the preceding claims, in which the dirt load of the dirt-laden rinsing fluid is determined and data characteristic thereof are used to control the application of rinsing fluid per unit time and/or the rotational speed of the goods in rope form.
5. Method according to claim 4, characterised in that sensor elements (32), which are exposed to the action of the dirt-laden rinsing fluid, are used to determine the dirt load.
6. Method according to claim 5, characterised in that the pH value and/or the electric conductance and/or the cloudiness of the dirt-laden rinsing fluid are determined.
7. Method according to one of claims 4 to 6, characterised in that the end of the rinsing period is determined in dependence on measured data of the dirt-laden rinsing fluid.
8. Method according to claim 7, characterised in that a predetermined absolute measured value of at least one magnitude characterising the dirt load of the dirt-laden rinsing fluid is used to determine the end of the rinsing period.
9. Method according to claim 7, characterised in that the ratio between a start value and an end value of at least one magnitude characterising the dirt load of the dirt-laden rinsing fluid is used to determine the end of the rinsing period.
10. Method according to one of claims 4 to 9, characterised in that the time change of a magnitude characterising the dirt load is used to determine the end of the rinsing period.
11. Method according to one of claims 4 to 10, characterised in that the measurement or determination of the data characterising the dirt load is conducted on the goods in rope form.
12. Method according to one of the preceding claims, characterised in that only the application of rinsing fluid per unit time or the speed of the goods in rope form is changed during the rinsing period and the respective other parameter remains constant.
13. Method according to one of the preceding claims, characterised in that a higher application of rinsing fluid per unit time is used at the beginning of the rinsing process than towards the end of the rinsing process.
14. Method according to one of the preceding claims, characterised in that a computing model is determined from goods-specific data of the textile fabric, from machine-specific data and from treatment-specific data, and that the control of the application of rinsing fluid application per unit time and/or the speed of the goods in rope form is conducted by a computer (33) in dependence on this predetermined computing model.
15. Method according to claim 14, characterised in that the computing model is updated by data recorded during the rinsing process.
16. Method according to one of the preceding claims, characterised in that the consumption of rinsing fluid per unit time and the rinsing period are optimised in dependence on predetermined criteria.
17. Device for implementing the method according to one of the preceding claims, with a closed container (1) that has fluid discharge means (14, 27), a venturi transport tube system (6) associated with the container (1), to which a gaseous transport medium is applied, and with a means for applying a rinsing fluid to goods in rope form (4) caused to circulate through the transport tube system (6) in the container (1), characterised in that

    • it has means (34, 34a; 21; 36) for applying rinsing fluid before, in the region of or behind the transport tube system (6) in the running direction of the goods in rope form and means (17; 11, 34) for changing the application of rinsing fluid per unit time to the goods in rope form (4) and/or the rotation sped of the goods in rope form,
    and that control elements (33) are provided, by means of which the means for changing the application of rinsing fluid per unit time and/or the rotational speed of the goods in rope form can be actuated in such a manner that the application of rinsing fluid per unit time and/or the rotational speed of the goods in rope form can be program-controlled.
18. Device according to claim 17, characterised in that the means for changing the application of rinsing fluid per unit time has pumping elements (17), which are variable in pumping capacity, and/or elements (20, 35; 55a) controlling the throughput of rinsing fluid.
19. Device according to claim 17 or 18, characterised in that the means for changing the speed of the goods in rope form per unit time has blower elements (11), which are variable in their throughput of transport medium and/or elements (34) controlling the throughput of transport medium.
20. Device according to one of claims 17 to 19, characterised in that it has sensor elements (32), which monitor the goods in rope form (4) and/or the rinsing fluid and which input data characterising the application of rinsing fluid to the goods in rope form during the rinsing process into the control elements (33), and that the control elements (33) are arranged for the program-based processing of these data.
21. Device according to claim 20, characterised in that the control elements (33) have a user-accessible input for an input of data by the user to influence the application of rinsing fluid per unit time and the speed of the goods in rope form.
22. Device according to one of claims 17 to 21, characterised in that the control elements (33) are programmed with a computing model, which displays the rinsing process and the degree of rinsing success on the basis of goods-specific data of the textile fabric, machine-specific data and treatment-specific data.
23. Device according to one of claims 17 to 22, characterised in that the consumption of rinsing fluid per unit time and the rinsing period are optimised by the control elements (33) in dependence on predetermined criteria.

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