JP2008280666A - Method and device for dyeing textile substrate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and device for dyeing textile substrate. <P>SOLUTION: The dyeing of textile substrate, in particular, of dyeing a textile substrate with reactive dyes, is described in which the textile substrate is brought in contact with a dyeing liquor containing at least one dye and after a predetermined dyeing time has elapsed, the dyed textile substrate is rinsed. The at least one dye which has not been fixed by the textile substrate and is present in the dyeing liquor is destroyed by a chemical and/or physical treatment to such an extent that the dyeing liquor is largely colorless hereafter, whereby the textile substrate being rinsed with the largely decolored liquor. A device for carrying out the method comprises a vessel for receiving the textile substrate to be dyed and a circulation system for the dyeing liquor, where a reactor through which the dyeing liquor flows is assigned to the vessel and/or the circulation system and where inside the reactor the chemical and/or the physical treatment of the liquor to be decolored is carried out. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention implements a method for dyeing a textile substrate (substrate) having the structure of the preamble part (so-called part) according to claim 1 and a method having the structure of the preamble part according to claim 13. It relates to a device for.

  In order to dye a textile substrate, and in particular to dye a textile substrate using a reactive dye as a dye, the textile substrate is brought into contact with a dye solution containing one or more kinds of dyes, It is known to rinse the dyed textile substrate after the dyeing time has elapsed.

  Depending on the method and equipment chosen in each case, there is a difference between pad roll dyeing, pad steam dyeing and exhaust dyeing, but in any method, after the actual dyeing process, the textile substrate Rinsing is necessary to remove the fixing dye.

  This rinsing process required for conventional dyeing methods is also called a soaping process in the field of reactive dyeing, mainly a dilution process which is repeated several times, which requires a large amount of water. For example, a liquid ratio of 1: 4 to 1: 6 can be used for exhaust dyeing of the strands of the textile web, ie about 4 liters to 6 liters of water are required for 1 kilogram of textile substrate to be dyed. It is. On the other hand, an overall liquid ratio of 1:80 to 1: 200 is necessary in the actual rinsing process, and this overall liquid ratio has to be repeated many times, for example 4 to 8 times. This is due to the fact that That is, as a whole, this rinsing process is on the one hand a very time consuming process and on the other hand a process requiring a large amount of water.

  The object of the present invention is to provide a specific method by which the dyeing of textile substrates, in particular the dyeing of textile substrates with reactive dyes, can be carried out particularly economically.

  This object is achieved according to the invention by a method having the structure of claim 1.

  The method of the present invention for dyeing a textile substrate, in particular for dyeing a textile substrate with a reactive dye, brings the textile substrate into contact with a dye liquor containing at least one dye, The dyed textile substrate is rinsed after a predetermined dyeing time that is processed at a high temperature. In contrast to the known dyeing methods described above, in the method according to the invention, at the end of dyeing, at least one dye still present in the dye liquor that has not fixed to the textile substrate, Degraded by chemical and / or physical treatment until colorless, the textile substrate is then rinsed with the original dye liquor thus decolored.

  Specifically, when the method of the present invention is applied to exhaust dyeing, at the end of exhaust dyeing, the dye solution is not discharged into the drainage channel, and the dye solution is substantially decolored from the original colored dye solution. Until chemically treated and / or physically treated so that it can be further used to rinse the dyed textile substrate. This decolorization process can be repeated frequently, either continuously or batchwise, until the non-fixing dye still present in the textile substrate is removed without residue, and as a whole, in the method of the invention, in the most preferred case A single liquid is sufficient for dyeing and rinsing. As a result, using the method of the present invention, textile substrates, in particular textile substrates dyed with reactive dyes in a liquid ratio of 1: 4 to 1: 6, can be dyed and rinsed. In contrast to the prior art described above, which requires 4 to 6 liters of water to dye and rinse a kilogram of textile substrate.

  However, when the textile substrate is dyed by pad roll dyeing or pad steam dyeing, in the method of the present invention, it is necessary to first apply a dye solution to the textile substrate according to the degree of drawing. is there. This requires about 600-900 grams of dye liquor per kilogram of textile substrate. After a predetermined roll time (residence time) or steam time, the textile substrate dyed in this way is preferably rinsed at a liquid ratio of 1: 4 to 1: 6, most preferably a variant of the invention. In the process, the initial rinsing liquid contains dyes present in the dye liquor that did not settle on the textile substrate, which are then treated by chemical and / or physical treatment until they are substantially colorless. Decompose and rinse the textile substrate again with the substantially decolorized liquid. If necessary, the decomposition of the dye and a new rinse with the decolorized rinse can be repeated many times. Therefore, this variant of the invention is also very advantageous with regard to water consumption during rinsing compared to conventional pad roll dyeing or conventional pad steam dyeing. In the process according to the invention, the liquid ratio is especially between 1: 4.6 and 1: 6.9.

  In addition to the advantages described above, the present invention has further advantages. First of all, the method of the present invention compared with the conventional method greatly reduces the need for water, resulting in a significant reduction in the amount of waste water, a reduction in environmental pollution, and a very favorable cost. There must be. In the most preferred case of the process according to the invention, only one rinsing bath is used, so that one rinsing bath has to be heated once. In contrast, the prior art uses four to eight rinsing baths that must be heated from room temperature to, for example, 80 ° C. many times. In particular, since the method of the present invention has no liquid exchange during rinsing (soaping), the method of the present invention also saves considerable time, and using the method of the present invention dyes per predetermined unit time. Substrate throughput is significantly increased. This also leads to considerable headcount reduction and has a positive impact on the economic viability of the method of the invention. Furthermore, dyed textile substrates, in particular those rinsed by the method of the invention, have a level of fastness, preferably wet rub fastness, dry rub fastness, wash fastness, water fastness and sweat fastness. It has also been surprisingly confirmed by those skilled in the art that the level of fastness with respect to sex is not different from textile substrates dyed by conventional methods.

  In a first further embodiment of the method of the invention, after a predetermined dyeing time has passed, the textile substrate is removed from the dye liquor, ie from the device used for dyeing, and transferred to another device for rinsing. In this other apparatus, the actual rinsing process is carried out to first transfer the dye that does not adhere to the textile substrate and does not fix to the rinsing liquid, and the rinsing liquid after treatment is substantially colorless to the rinsing liquid containing the non-fixing dye. Then, chemical treatment and / or physical treatment can be performed so that, if necessary, it can be used for further rinsing. In this further embodiment of the method of the invention, the rinsing process takes place in another device with a technically less complex structure compared to the actual dyeing device, and the work process proceeds at a much reduced cost. There are advantages.

  According to a particularly preferred further embodiment of the method according to the invention, at least one dye that does not settle on the textile substrate and is present in the dyeing or rinsing liquor is decomposed by chemical treatment. This chemical treatment is in particular an oxidation treatment.

  In principle, any chemical that decomposes the dye can be used for this chemistry, preferably the oxidation treatment, until a colorless decomposition product is obtained. For this purpose, hydrogen peroxide, peracetic acid and sodium hypochlorite are preferred.

  However, in the method of the present invention, it is particularly preferable that the oxidation treatment of the dye solution performed at the end of the actual dyeing described above includes treatment with ozone or only treatment with ozone. Ozone decomposes several different dyes or groups of dyes in the shortest time, i.e. within seconds to minutes, leaving no or only a few colorless dye degradation products on the textile substrate Was confirmed.

  As a rule, in the process of the invention, at the end of the actual dyeing in a single bath, the non-fixing dyes still present in the dye liquor and textile substrate are decolorized by chemical and / or physical treatment. The dye liquor can be processed. However, it is particularly preferred to modify the method according to the invention as follows: the dye liquor is separated from the dyed textile substrate and then subjected to chemical and / or physical treatment, Bypassing the actual dyeing device, in this bypass, the dye contained in the dye liquor is modified by suitable chemical and / or physical treatment until a colorless decomposition product of the dye is formed Preferably it is done. Accordingly, the dye liquor is decolorized and used as a colorless rinse to again rinse non-fixed dye from the dyed textile substrate. The accumulated dyed rinsing liquid can be used for rinsing again as a colorless rinsing liquid after chemical and / or physical treatment, if treated as described above for the original dyeing liquid.

  For the sake of clarity here, the term “and / or” as used herein may be considered as both individual elements of the part, respectively, and when considered as both, And at least two elements are connected to each other. However, reference to a single dye shall cover not only a single dye but also a mixture of different dyes.

  Within the scope of this application, physical treatment is to be considered as any treatment suitable for degrading the dye until the result is the formation of a colorless degradation product. Thus, the liquid thus decolored can be used in an actual rinsing process.

  It is particularly preferred if this physical treatment is carried out by irradiating the colored liquid to be treated with UV light and / or applying an electrochemical process with a special diamond-coated electrode, also termed a CVD electrode in technical terms. It is.

  As already mentioned above, in the method of the present invention, if preferred, the dyed textile substrate is rinsed with only the decolorized liquid at the end of the dyeing, but in the method of the present invention, preferably by exhaust dyeing. At the end of a certain dyeing, it cannot be excluded that the dyeing liquid is drained and replaced with a single rinsing liquid. After contact with the dyed textile substrate, chemical and / or physical treatment is performed to decompose the unfixed dye contained therein until a colorless decomposition product and a colorless liquid are produced. To do. This variation of the method of the present invention is from a economical point of view because the residual dye concentration in the dye liquor is too high and decoloring by chemical and / or physical treatment is expensive. It can be used whenever replacement is more desirable.

  However, the method of the invention has been modified to rinse the textile substrate with the decolored dye liquor in the first step, and then separate the rinse liquor containing the non-fixing dye in the second step, In step 3, the non-fixing dye in the rinsing liquid is decomposed by chemical and / or physical treatment until the rinsing liquid is substantially colorless, and in the fourth step, the textile substrate is rinsed with the substantially colorless rinsing liquid. Rinsing with a liquid is particularly suitable and economically preferable.

  According to the method of the present invention, depending on which textile substrate is dyed with which dye and to what color intensity, the first to fourth steps according to the modification of the method of the present invention are performed a plurality of times, in particular two times to Repeat 15 times.

  Although already shown to be advantageous, according to an embodiment of the method of the invention, the treatment with ozone is carried out as a chemical treatment of the dye liquor and / or as a chemical treatment of the rinsing liquor. The treatment with ozone has the obvious advantage that ozone decomposes again in a short time, ie within a few seconds. In the method of the present invention, treatment with ozone can be carried out in a reactor assigned to each dyeing or rinsing device in order to reduce the costs of control regulations and safety. Decolorized dye liquor and / or decolorized rinse liquid flows continuously through the reactor. That is, in this embodiment of the method of the present invention, the dyed textile substrate is separated from the dyeing solution ozone treatment step and / or the rinsing solution ozone treatment step, and these dyes already fixed on the textile substrate Ozone will not work reliably.

  In a particularly advantageous further embodiment of the method according to the invention, in order to ensure that the decolorized liquid (dye liquor or rinse) with residual ozone does not come into contact with the dyed textile substrate, It has proved particularly advantageous if redox potential measurements, ozone measurements and / or pH measurements are made at the outlet of the reactor. If the corresponding measured value indicates that residual ozone is present in the corresponding treated liquid, this residual ozone can be removed by increasing the temperature for a short period of time. This is done by providing another bypass to the device and passing the residual ozone-containing liquid through a corresponding valve set.

  As another possibility or in addition to the aforementioned variants, the amount of ozone fed to the reactor is controlled depending on the measured redox potential, the measured ozone concentration and / or the measured pH value. As such, when the method of the present invention is performed to determine residual ozone in the decolorized liquid, the amount of ozone supplied to the reactor is reduced.

  In principle, as outlined at the outset, the method of the invention can be used for any dyeing method, in particular pad roll dyeing or pad steam dyeing. In this case, after application and fixing of the dye, the textile substrate thus dyed is usually rinsed continuously or discontinuously in suitable equipment, and in this variant of the process according to the invention, the rinse solution is as described above. A chemical and / or physical treatment is performed to decompose the dye contained in the rinse until the rinse is substantially colorless. The method of the invention applies to dyeings carried out in jiggers at normal and elevated temperature ranges. However, it is particularly preferred that the method of the present invention is used for exhaust dyeing. This is because, in this case, as described above, the dye liquor can be used by physical and / or chemical treatment for decolorization. Similarly, there is no limitation on the formation form of the textile substrate (production of the textile substrate) before dyeing to which the method of the present invention is applied. The method of the invention can also be used for yarn dyeing, traverse bobbin or strand dyeing, and is also suitable when dyeing textile substrates as textile fabrics, preferably as continuous web strands, by the method of the invention. It is. As described above, this is because water is obviously saved.

  The present invention further relates to an apparatus for performing the method of the present invention as described above, and the method of the present invention can be carried out particularly economically.

  As described above, the apparatus of the present invention for carrying out the method of the present invention includes, in particular, a container (housing) containing the textile substrate to be dyed and a circulation system for the dye liquor. A reactor through which the dye liquor flows is assigned to the vessel and / or the circulation system. Within the reactor, chemical and / or physical treatment of the liquid to be decolored (the last dyeing liquid and / or rinsing liquid of the dyeing process) is performed.

  The device according to the invention described above has all the advantages already described for the method according to the invention. In particular, according to the apparatus of the present invention, a textile substrate dyed by the exhaust dyeing method can be rationally used, and in another reactor, the actual physical and / or chemical treatment for liquid decolorization. By doing this, it is possible to avoid disturbing the dyed textile substrate, in particular undesirable damage.

  Similarly, according to an embodiment of the apparatus of the present invention, the container containing the textile substrate to be dyed can form a reactor for performing chemical and / or physical processing. That is, in this embodiment, the actual reactor is formed by the staining container itself or by other devices arranged separately as described above in the method of the present invention. The dyed but not rinsed textile substrate is transferred for rinsing and chemical and / or physical treatment is carried out after dyeing in the dyeing vessel itself or in other equipment.

  In a particularly preferred and space-saving embodiment of the device according to the invention, a first piping system for the dye liquor is placed in the lower region of the container for the actual dyeing and rinsing, which is the first Connected to the reactor in the lower region of the vessel via a valve and a liquid pump. The reactor is connected by a second piping system and a second valve to a container that supplies a substantially colorless dye or rinsing liquid after treatment. Generally speaking, the lower region of the vessel is connected to the reactor via a valve or liquid pump, and the reactor itself is connected to the vessel via a valve. The actual processing steps of liquid chemical and / or physical decolorization take place in this reactor connected as a bypass. After actual dyeing, each dye liquor is fed to the reactor using a liquid pump and a suitable open first valve. The chemical and / or physical treatment of the liquid to break down and decolorize the dye takes place there, and the decolorized liquid is returned back to the container via the second valve to the actual The rinsing process is started.

  In the above-described modified apparatus of the present invention, to ensure the required constant temperature, it is necessary to remove unwanted residues of ozone and / or other oxidants from the decolorized liquid flowing back to the vessel. According to a further embodiment of the device of the present invention, a heat exchanger is assigned to the second piping system.

  Furthermore, in another embodiment of the device according to the invention, at least one sensor for detecting the redox potential, the ozone concentration and / or the pH value is assigned to the second piping system and an unwanted residue of oxidant. In particular, undesired residues of ozone, which may be defective, are detected by at least one sensor before the residual oxidant or liquid with residual ozone comes into contact with the dyed textile substrate . In order to eliminate the cause of such an error, at least one sensor is arranged in front of the second valve when viewed from the direction of liquid flow. This second valve allows each liquid stream to be fed via a second valve, for example to a heat exchanger, when these are detected in an undesirable residue concentration of oxidant, in particular ozone. It is preferred that the undesired residue is discharged and a liquid without residue is supplied to the container.

  In an embodiment of the apparatus of the present invention where non-fixed dyes from the dye liquor or rinsing liquid are decomposed by ozone treatment until a colorless component is formed, an apparatus that generates ozone can be assigned to the reactor. Such devices themselves are known in the prior art. However, of course, ozone can also be applied to the reactor by providing a suitable ozone storage tank. This variant is to decompose the residual unfixed dye by ozone treatment until the dye liquor still has a high concentration of unfixed dye at the end of the actual dyeing process and a colorless component is produced. Therefore, it is particularly suitable when a large amount of ozone is used in the reactor.

  For safety reasons, in a further embodiment of the device of the invention, it is recommended to assign a third piping system to the reactor. This piping system connects the space of the reactor to the exhaust fan via the residual ozone disappearing device and the third valve. In this case, if the sensor for detecting the ozone concentration is in the exhaust section, a corresponding audible or visually observable signal is optionally generated before the ozone-rich exhaust flows into the atmosphere, which is further particularly advantageous.

  In order to ensure that a sufficient amount of ozone required for the treatment of the dyeing or rinsing liquid is always available, according to another embodiment of the device of the invention, the ozone generator is for oxygen-rich air. Connected to the source, the actual ozone is generated especially just before use.

  As described above, the apparatus of the present invention is particularly used in dyeing methods that employ an exhaust process, and the apparatus of the present invention is therefore applicable to the manufacture of articles to be dyed.

  Thus, the container containing the textile substrate to be dyed includes a storage system assigned to the lower region, and a web strand deflection device is provided on the container. In addition, the web strand deflector includes a drive mandrel and / or nozzle channel so that the web strand is continuously moved and folded during dyeing and rinsing.

  A second possibility, particularly used for dyeing large, fixed webs, is expected to provide a cylindrical container with a dye beam (perforation beam) for receiving a web roll.

  A third possibility is to further develop the device according to the invention so that the container has at least one holder for receiving at least one bobbin, in particular at least one traversed bobbin. This variant of the device according to the invention applies to bobbin staining.

  Circulation pumps, heat exchangers, color troughs (dye supply tanks) and / or scraps (waste fiber traps) so as not to interfere with the process sequence of the method of the invention or the processing of textile substrates dyed with the device of the invention Is assigned to the circulation system, during the actual dyeing process, the dye liquor, the decolored dye liquor at the end of the dyeing process or the decolorized rinse liquid flows there.

  Further advantages of the inventive method and the inventive device are defined in the dependent claims.

  Details of the method of the present invention and the apparatus of the present invention are described below with reference to exemplary embodiments of the apparatus of the present invention. In the drawing, an outline of the apparatus of the present invention is shown.

  The embodiment of the device 11 shown in the drawing includes a normal dyeing facility 10 and is provided with a container 12 for containing a web strand 13 to be dyed. During dyeing and rinsing, the web strand 13 moves continuously through the container 12. In the illustrated embodiment, a drive mandrel 14 is used to move the web strand 13.

  The liquid circulation system 16 is assigned to the lower region 15 of the container 12, where each processing liquid is drawn from the container 12 by the liquid circulation pump 17 and the heat exchanger 18 through the liquid circulation system 16. After the liquid is heated, it is again supplied to the container. During this process, the web strand 13 is moved by the mandrel 14 in the direction of the arrow 19a at a predetermined speed. The moving speed is usually 200 m / min to 800 m / min. In addition, scrap and color troughs (not shown) are assigned to the liquid circulation system 16.

  The reactor 6 is detoured from the dyeing facility 10 and the actual chemical and / or physical treatment of the dyeing or rinsing liquid takes place there, and in the illustrated embodiment, for the non-fixing dyes The dye is decomposed until it is chemically treated with ozone to give a colorless component. Reactor 6 is connected to ozone generator 2 via line 3, where oxygen-rich air is supplied via line 1 in the ozone generator. Furthermore, on the input side, the reactor 6 is connected to the lower region 15 of the container 12 via the first piping system 19, and when viewed from the container 12 to the reactor 6 in the direction of liquid flow, Are provided with a valve 20, a liquid pump 4 and a heat exchanger 5.

  Furthermore, when viewed in the direction of the liquid flow again, the reactor 6 is connected to the lower region 15 of the container 12 by the second piping system 21 via the sensor 7 and the second valve 22. Yes.

  Finally, the third piping system 23 is opened from the reactor 6 to the exhaust fan 9, and connects the space provided to the reactor 6 to the exhaust fan 9 via the residual ozone disappearing device 8. The exhaust fan 9 is opened to the atmosphere.

  The illustrated apparatus operates as follows.

  First, the textile web strand 13 is supplied to the dyeing equipment 10. For this purpose, the web strands 13 are made of continuous web strands and are arranged inside the container 12. The lower region of the container is filled with the dye solution, and during the actual dyeing, the liquid circulation system 16 continuously pumps the liquid and moves the web strand 13 continuously. Such a dyeing facility 10 and its mode of operation are those of the prior art.

  After the dyeing is completed in the dyeing equipment 10, the dye solution in the container 12 is opened in the valve 20, the liquid pump 4 is utilized, the heat exchanger 5, the first piping system 19, and the reactor. Pump continuously to 6. Thereby, the liquid in the reactor still containing residual dye that has not been discharged and fixed is treated in the reactor 6 with ozone. In this case, ozone is continuously formed in the ozone generator 2 from the oxygen-rich air supplied via the line 1 and is added to the reactor in a predetermined amount by the line 3. Controlling the amount of ozone, on the one hand, the liquid leaving the reactor 6 is colorless and, on the other hand, the sensor provided in the second piping system 21 no longer displays residual ozone. However, in the unlikely event that residual ozone is still detected here, the valves 20 and 22 provided to the piping systems 19 and 21 that were open during processing are automatically closed. At the same time, the pump 4 is switched off so that the process in the reactor is interrupted immediately.

  The liquid decolorized in this way by the ozone treatment passes through the second piping system 21 and the opened valve 22 to the lower region 15 of the container and moves at a predetermined speed in the direction of the arrow 19a. The web strand 13 is rinsed.

  After a predetermined time, which depends on the substrate to be dyed, the selected dye, the color intensity, the liquid ratio and / or the loading and moving speed of the container 12, the rinsing process is terminated and residual ozone remaining in the system, in particular in the reactor Residual ozone can be decomposed by the residual ozone disappearing device 8, and ozone-free exhaust gas can be removed from the system via the exhaust gas fan 9.

  The container 12 can be evacuated, dyed and fully rinsed web strands can be removed from the container 12 and the aforementioned dyeing and rinsing process can be carried out in a total liquid ratio of 1: 4 to 1: 6 in total. it can.

The outline of the device of the present invention is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Line 2 Ozone generator 3 Line 4 Liquid pump 5 Heat exchanger 6 Reactor 7 Sensor 8 Ozone disappearance apparatus 9 Exhaust fan 10 Dyeing equipment 11 Apparatus 12 Container 13 Web strand 14 Drive mandrel 15 Lower area 16 Circulation system 17 Liquid circulation pump 18 Heat exchanger 19 First piping system 20 Valve 21 Second piping system 22 Second valve 23 Third piping system

Claims (25)

A method for dyeing a textile substrate, in particular, a method for dyeing a textile substrate with a reactive dye, wherein the textile substrate is brought into contact with a dye solution containing at least one dye, and a predetermined dyeing time has elapsed. Later, in a method of rinsing the dyed textile substrate,
At least one dye present in the dye liquor without fixing to the textile substrate is decomposed by chemical treatment and / or physical treatment until the dye liquor is subsequently substantially colorless, and the textile substrate Rinsing with the substantially decolorized liquid.   After a predetermined dyeing time has elapsed, the textile substrate is removed from the dyeing liquid, transferred to an apparatus for rinsing, and the rinsing liquid containing non-fixing dye is subjected to chemical treatment and / or physical treatment. The method of claim 1, characterized in that:   3. A method according to claim 1 or 2, characterized in that the at least one dye present in the dye liquor or rinse without fixing to the textile substrate is decomposed by chemical treatment.   The method according to claim 1, wherein an oxidation treatment is performed as the chemical treatment.   The method according to claim 4, wherein treatment with ozone is performed as the oxidation treatment.   6. A method according to any one of the preceding claims, wherein the dye liquor is separated from a dyed textile substrate and the chemical and / or physical treatment is subsequently performed.   The method of claim 6, wherein the textile substrate is rinsed only with the decolorized liquid.   In the first step, the textile substrate is rinsed with the decolored dye liquor, and in the second step, the rinsing liquid containing the non-fixing dye is subsequently separated, and in the third step, The unfixed dye in the rinsing liquid is decomposed until the rinsing liquid becomes substantially colorless, and the textile substrate is rinsed with the substantially colorless rinsing liquid in a fourth step. The method according to claim 7.   The method according to claim 8, wherein the first to fourth steps are repeated a plurality of times, particularly 2 to 15 times.   A reactor in which treatment with ozone is performed as the chemical treatment of the dyeing liquid and / or rinsing liquid, and the treatment with ozone is assigned to each dyeing apparatus, and the dyeing liquid and / or rinsing liquid flows continuously. The method according to claim 1, wherein the method is carried out in   The method according to claim 10, wherein the oxidation-reduction potential measurement, ozone measurement and / or pH measurement of the ozone-treated liquid are performed at the outlet of the reactor.   The method according to claim 11, wherein the amount of ozone supplied to the reactor is controlled according to the measured redox potential, the measured ozone concentration and / or the measured pH value.   The method according to any one of claims 1 to 12, characterized in that a fabric is dyed as the textile substrate. An apparatus for carrying out the method according to any one of claims 1 to 13, comprising a container for containing the textile substrate to be dyed and a circulation system for the dye liquor. In
The reactor (6) through which the dye liquor flows is assigned to the vessel (12) and / or the circulation system (16), and in the reactor (6) the chemical treatment and / or physics of the liquid to be decolorized A device characterized by performing a general process.   15. A device according to claim 14, characterized in that a container (12) containing the textile substrate to be dyed forms a reactor for carrying out the chemical and / or physical treatment.   A first piping system (19) for the dye liquor is disposed in a lower region (15) of the container (12), and is connected to the reactor via a first valve (20) and a liquid pump (4). (6) is connected to the lower region (15) of the vessel (12) and, after the treatment, the reactor (6) is connected to a second piping system ( Device according to claim 14, characterized in that it is connected to the container (12) by 21) and a second valve (22).   17. A device according to claim 16, characterized in that a heat exchanger (18) is assigned to the second piping system (21).   At least one sensor (7) for detecting the redox potential, ozone concentration and / or pH value is assigned to the second piping system (21) and when viewed in the direction of the liquid flow, 18. Device according to claim 16 or 17, characterized in that the at least one sensor (7) is arranged in front of the second valve (22).   Device according to any one of claims 14 to 18, characterized in that a device (1, 2, 3) for generating ozone is assigned to the reactor (6).   A third piping system (23) is assigned to the reactor (6), and the piping system connects the void of the reactor (6) to the exhaust fan (9), the residual ozone elimination device (8) and 20. The device according to claim 19, wherein the device is connected via a third valve.   21. The device according to claim 19 or 20, characterized in that the ozone generator (1, 2, 3) is connected to an oxygen-enriched air source.   The container (12) containing the textile substrate (13) to be dyed comprises a storage system assigned to the lower region (15), and a deflection device (14) for the web strand (13) 23. Any of the claims 14-21, characterized in that a deflection device (14) for the web strands is provided on the container (12) and has a drive mandrel and / or nozzle channel. The apparatus according to one item.   22. An apparatus according to any one of claims 14 to 21, wherein the container has a dye beam for receiving web strands.   Device according to any one of claims 14 to 21, characterized in that the container has at least one holder for receiving at least one bobbin, in particular at least one traversed bobbin. 25. A liquid circulation system (16) comprising a liquid circulation pump (17), a heat exchanger (18), debris and / or a color trough. The device described.

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