WO2006126316A1

WO2006126316A1 - Method of cleaning textile product

Info

Publication number: WO2006126316A1
Application number: PCT/JP2006/303804
Authority: WO
Inventors: Toru Shimizu
Original assignee: Hisaka Works, Ltd.
Priority date: 2005-05-25
Filing date: 2006-02-28
Publication date: 2006-11-30
Also published as: US20090089937A1; JP2006328580A; CN101160427A; CN101160427B; JP4551818B2

Abstract

An excellent method of cleaning a textile product capable of removing oligomers, the residue of dyes, and the like completely (or substantially completely) without causing insufficient cleaning or overcleaning by employing a treating apparatus of a type which treats a textile product by circulating a treating liquid. The cleaning method comprises a high temperature treating step of treating a textile product placed in a treating bath by bringing a textile product into contact with a treating liquid circulating through the treating bath while heating the treating liquid to high temperature by means of an indirect heat exchanger provided at a portion of the circulation path, and a liquid replacing/cleaning step of supplying cleaning water gradually into the treating bath while discharging the high-temperature treating liquid gradually therefrom and lowering the liquid temperature in the treating bath down to a predetermined point while keeping the quantity of liquid in the treating bath constant by exchanging heat directly between the high-temperature treating liquid being discharged and the cleaning liquid being supplied and equalizing the quantity of high-temperature treating liquid being discharged to the quantity of cleaning liquid being supplied. An optimal value of the temperature gradient in the liquid replacing/cleaning step is preset and the actual temperature gradient is equalized or approximated to the optimal value by performing heating or cleaning through the indirect heat exchanger.

Description

Specification

How to wash textiles

Technical field

[0001] The present invention relates to a cleaning method after dyeing or other treatments for textiles such as fabrics.

Background art

For example, a liquid flow treatment apparatus as shown in FIG. 4 is widely used as an apparatus for performing a process such as dyeing on a textile. This apparatus includes a staying portion 2 for a fiber product 1 such as a fabric, and an annular treatment tank 4 connecting the staying portion 2 and a transfer passage 3 for the fiber product 1. Then, the processing liquid is sucked in from the processing liquid suction section 5 (three places in this figure) provided at the bottom of the stagnant section 2, and is controlled to a predetermined temperature via the circulation pump 6 and the indirect heat exchanger 7. The treated liquid (normally the maximum temperature is set to a high temperature of 100 ° C or higher) is returned to the treatment liquid jetting part 8 attached to one end of the transfer passage 3, and the textile 1 It is now possible to carry out processing while transporting!

In such a liquid flow treatment, various dyes and other chemicals, auxiliaries, etc. remain in the treatment liquid at the time when the treatment is completed. It also contains oligomers, fluff, scales, etc. that are produced from the fiber product 1 and are products of fiber polymerization.

[0004] For this reason, for example, when polyester deep color dyeing or the like is performed, the treatment liquid is circulated while lowering the temperature of the treatment liquid by passing cooling water through the indirect heat exchanger 7 after the treatment is completed. The so-called “reduction cleaning” in which hydrosulfite and alkali agents (caustic soda, soda ash, etc.) are injected into the treatment tank 4 while the temperature is maintained, and the residue is reduced. It is carried out. After the reduction cleaning, the processing liquid is cooled again to around 60 ° C, and then the processing liquid is discharged. The cleaning water (usually water) is supplied, washed and drained several times to wash the textile 1 After that, the textile is taken out from the processing tank 4. An example of the above series of dyeing / cleaning treatment steps is as shown in FIG.

[0005] However, as can be seen from the process chart of FIG. There is a problem that it takes time and the temperature gradient during cooling is not smooth, and the quality of the fiber product 1 obtained by causing wrinkles in the fiber product 1 is likely to deteriorate. In addition, oligomers that have been dissolved at a high temperature reprecipitate by cooling and remain in the treatment tank 4, so that the so-called kettle washing process must be performed frequently, which is troublesome. There is also.

[0006] On the other hand, the applicant of the present invention uses an airflow treatment apparatus that performs treatment while injecting a gas-liquid mixed fluid of a treatment liquid and an airflow onto a fiber product and circulatingly moving the inside of the treatment tank. And a completely new cleaning method that supplies cleaning water while exchanging heat with the treated wastewater and has already been put into practical use (see Patent Document 1).

Patent Document 1: Japanese Patent Application Laid-Open No. 8-269863

Disclosure of the invention

Problems to be solved by the invention

[0007] Therefore, it is considered that the cleaning method in the airflow treatment device can be applied to the liquid flow treatment device. The liquid flow treatment and the airflow treatment are different in the amount of treatment liquid used and in the device configuration. It has been clarified that it is difficult to apply the method as it is to the liquid flow treatment device.

[0008] Therefore, the present applicant is able to perform an effective cleaning process in a shorter time even when using a liquid flow type treatment method in which a treatment liquid is circulated to treat a fiber article. We have developed and have filed an application for a cleaning method and a textile processing device used therefor (Japanese Patent Application No. 2004-29 5212).

FIG. 6 shows an example of an apparatus that can be applied to the above application. The basic configuration of this apparatus is the same as that shown in FIG. 4, and the same parts are denoted by the same reference numerals and the description thereof is omitted. In this apparatus, however, the circulation pump 6 and the indirect heat exchanger 7 are provided. In the processing liquid circulation path 10 provided, a processing liquid discharge pipe 11 for taking out and discharging a part of the circulating processing liquid is connected to the suction side of the circulation pump 6, and the above processing is performed downstream of the connecting portion. A cleaning water supply pipe 12 for supplying cleaning water into the liquid circulation path 10 is connected via a check valve 13. The treatment liquid discharge pipe 11 and the cleaning water supply pipe 12 both pass through the heat exchanger 14, and the heat exchanger 14 directly exchanges heat between the high temperature processing liquid and the normal temperature washing water. It has become so. The treatment liquid discharge pipe 11 and the cleaning water supply pipe 12 are respectively opened. Closed valves 15 and 16 and flow meters 17 and 18 are provided so that the discharge amount of the processing liquid and the supply amount of cleaning water can be controlled to be equal to each other. In addition, 19 is a pump for supplying cleaning water, and 20 is a water supply valve.

[0010] The cleaning method of the above application uses the liquid flow processing apparatus to perform processing and cleaning of the fiber product 1 as follows, for example. That is, first, in the same manner as a normal liquid flow processing apparatus, the same processing as usual is performed with the fiber article 1 such as a fabric loaded in the processing tank 4 and the on-off valves 15 and 16 closed. When the treatment is completed, the feed valve 20 is opened and the pump 19 is operated to open the on-off valves 15 and 16 to open a part of the treatment liquid circulating in the treatment liquid circulation path 10. At the same time as taking out to the liquid discharge pipe 11, the cleaning water is supplied into the processing liquid circulation path 10. At this time, heat exchange is performed between the discharged high-temperature treatment liquid and normal temperature washing water by passing through the heat exchanger 14. In addition, by controlling the flow rate using the flow meters 17 and 18 and the on-off valves 15 and 16, the discharge amount of the processing liquid and the supply amount of cleaning water are controlled to be always equal. As a result, it is possible to perform cleaning while maintaining a constant amount of the liquid circulating in the processing tank 4 (mixed liquid in which the processing liquid is gradually replaced with the cleaning water). This cleaning process is referred to as a “liquid replacement cleaning process”.

[0011] As shown in the process chart of Fig. 7, when the liquid temperature falls to a medium temperature range (80 ° C in this example) higher than the low temperature range where the liquid temperature can be discharged, the on-off valve 15 is closed and processed. Stops taking out the high-temperature treatment liquid from the liquid discharge pipe 11 and supplies the washing water directly into the treatment tank 4 at a constant flow rate without exchanging heat with the high-temperature discharge liquid to cool the circulating liquid ( Direct water washing). The supply of the wash water at this time does not necessarily have to be a constant flow rate, and the increased amount of the liquid in the treatment tank 4 due to the supply of the wash water is gradually discharged from the drain valve. Then, when the temperature of the circulating liquid reaches a predetermined low temperature range (60 ° C in this example), the supply of the washing water is stopped, the textile 1 is taken out, and the series of processes is completed.

[0012] According to this cleaning method, in the liquid replacement cleaning step, the high-temperature processing liquid used in the processing is discharged at a high temperature, and at the same time, heat exchange is performed with normal-temperature cleaning water supplied into the processing tank 4. As a result, the temperature of the cleaning liquid becomes much higher than before, and an excellent cleaning effect is achieved. In addition, since the treatment liquid is discharged at a high temperature, oligomers and dye residues are removed in a state of being dissolved in the treatment liquid. It is possible to omit the reduction cleaning process that is necessary in the above. Therefore, the steam and chemicals used for raising the temperature in the above-described reduction cleaning process are not necessary, and the cost can be reduced. Further, since the amount of the oligomers and dye residues attached to the inner wall of the processing tank 4 is reduced, the burden on maintenance such as cleaning the processing tank 4 regularly is reduced. Have. In addition, the amount of high-temperature processing liquid discharged and the amount of cleaning water supplied are controlled to be equal to each other, so that the amount of liquid circulating in the processing tank 4 remains constant even after shifting from dyeing processing to cleaning processing. As a result, the textile product 1 is not burdened with S and has a good finish.

By the way, in the above cleaning method, the transition from the liquid replacement cleaning process to the next process (for example, the direct cooling water cleaning process) is usually timed by temperature control, The temperature of the liquid is read with the temperature sensor over time, and when the temperature reaches a preset temperature (80 ° C in the above example), an operation instruction is given to the solenoid valve of the device, etc. I'm starting to move on.

[0014] However, if the liquid replacement cleaning process force is also shifted to the next process by temperature control as described above, the end time of the liquid replacement cleaning process becomes faster or slower depending on the water temperature. As a result, water wasted due to insufficient cleaning and excessive cleaning. For example, in the above liquid replacement cleaning process, the liquid temperature of the cleaning water supplied into the processing tank is the standard water temperature (18-20 ° C), and the liquid temperature in the processing tank reaches 80 ° C. Assuming that the required time is 20 minutes, if the wash water supply rate is set so that sufficient washing can be performed in this 20 minutes, the temperature gradient accompanying liquid replacement will increase when the water is cold in winter. For example, since the temperature reaches 80 ° C in 15 minutes and the process moves to the next process, the absolute amount of cleaning water supplied to the cleaning is insufficient and the cleaning is likely to be insufficient. Conversely, when the water is hot in summer, the temperature gradient associated with liquid replacement is small, and for example, it takes 25 minutes to reach 80 ° C. Easy to waste.

[0015] The present invention has been made in view of such circumstances, and an oligomer is used in a treatment method using a treatment apparatus of a type that circulates a treatment liquid and treats a fiber product, such as a liquid flow treatment apparatus. It is an object of the present invention to provide an excellent method for cleaning textiles that can completely (or almost completely) remove dye residues and the like, and that does not cause insufficient or excessive cleaning. Means for solving the problem

[0016] In order to achieve the above-mentioned object, the present invention loads a fiber product into a treatment tank and circulates the treatment liquid circulating inside and outside the treatment tank at a high temperature by an indirect heat exchanger provided in the middle of the circulation path. A high-temperature treatment step for treating the fiber product by contacting with the fiber product while heating, and gradually supplying cleaning water into the treatment tank while gradually discharging the high-temperature treatment liquid from the treatment tank. In addition, heat is exchanged directly between the discharged high-temperature treatment liquid and the supplied wash water, and the treatment volume is kept constant by keeping the discharge amount of the high-temperature treatment liquid equal to the supply amount of wash water. A liquid replacement cleaning step for lowering the liquid temperature in the tank to a predetermined temperature, and setting an optimum value of the temperature gradient in the liquid replacement cleaning step in advance, and the actual temperature gradient becomes larger than the optimal value Is heated by the indirect heat exchanger If smaller than the optimum value by performing the cooling by the indirect heat exchanger, to a method of cleaning textiles and to match or approximate to the optimal value of the actual temperature gradient and its gist.

The invention's effect

That is, the method for cleaning a textile product of the present invention is a liquid replacement cleaning process in which the high-temperature processing liquid used in the processing is discharged while exchanging heat with the cleaning water supplied into the processing tank. Thus, the temperature gradient associated with the heat exchange of the high temperature treatment liquid and the washing water is controlled so as to become a preset optimum value. As a result, the processing end time of the liquid replacement cleaning process becomes constant regardless of the temperature of the supplied cleaning liquid, so that the processing end time is shortened, resulting in insufficient cleaning or a long processing end time. In other words, there will be no waste due to excessive supply of cleaning water. Since the high temperature treatment liquid is discharged at a high temperature and gradually replaced with washing water, oligomers and dye residues dissolved at high temperature can be removed without precipitating in the liquid. The reduction cleaning treatment required for the deep color dyeing of polyester can be omitted. In addition, cooling and rinsing can be performed simultaneously while supplying the cleaning liquid in a state where the oligomers are removed, so that the rinsing process can be completed in a short time without the need for further rinsing. wear. And, since impurities such as oligomers do not adhere and remain in the treatment tank, the burden on maintenance such as cleaning the treatment tank regularly can be greatly reduced. It has the advantage of being able to.

[0018] In the same manner as in the above-mentioned prior invention (the invention invented in Japanese Patent Application No. 2004-295212), the draining force of the high-temperature treatment liquid and the supply amount of cleaning water are controlled to be equal to each other. Even if the process shifts from the dyeing process to the cleaning process, the amount of liquid circulating in the processing tank is kept constant, and the fiber product is not burdened, resulting in a good finish.

Brief Description of Drawings

FIG. 1 is a process chart in one embodiment of the present invention.

FIG. 2 is a partial process chart in another example of the present invention.

FIG. 3 is a partial process chart in still another embodiment of the present invention.

FIG. 4 is an explanatory view showing a conventional processing apparatus.

FIG. 5 is an example of a process chart in the above conventional example.

FIG. 6 is an explanatory view showing a processing apparatus for a prior application.

FIG. 7 is a process chart in the embodiment of the prior application.

BEST MODE FOR CARRYING OUT THE INVENTION

[0020] Next, the best mode for carrying out the present invention will be described.

In the cleaning method of the present invention, for example, the apparatus shown in FIG. 6 is used to clean the fiber product 1 as follows. The configuration of the apparatus is as described above, and a description thereof is omitted. That is, first, in the same manner as in a normal liquid flow processing apparatus, a fiber article 1 such as a fabric is loaded into the processing tank 4 and the same processing as normal is performed with the on-off valves 15 and 16 closed. When the treatment is completed, the feed water valve 20 is opened and the pump 19 is operated to open a part of the treatment liquid circulating in the treatment liquid circulation path 10 by opening the on-off valves 15 and 16. At the same time as taking out to the liquid discharge pipe 11, the cleaning water is supplied into the processing liquid circulation path 10.

[0022] At this time, heat exchange is performed between the discharged high-temperature treatment liquid and normal-temperature cleaning water by passing through heat exchange. Then, by controlling the flow rate using the flow meters 17 and 18 and the open / close valves 15 and 16, the discharge amount of the processing liquid and the supply amount of the cleaning water are controlled to be always equal. As a result, cleaning can be performed while the liquid volume and liquid temperature of the liquid circulating in the processing tank 4 (mixed liquid in which the processing liquid is gradually replaced with the cleaning water) and the liquid temperature are kept constant.

[0023] Then, the circulating liquid is completely replaced with the cleaning liquid, and the liquid temperature in the processing tank 4 reaches 80 ° C. At that time, the on-off valve 15 is closed to stop taking out the high temperature treatment liquid from the treatment liquid discharge pipe 11, and the washing water is directly supplied into the treatment tank 4 at a constant flow rate without exchanging heat with the high temperature discharge liquid. The circulating liquid is cooled (direct water washing). At this time, the supply of cleaning water does not necessarily have to be a constant flow rate, and the increased amount of liquid in the treatment tank 4 due to the supply of cleaning water gradually discharges the drainage valve force. Then, when the temperature of the circulating liquid reaches a predetermined low temperature range (for example, 60 ° C.), the supply of cleaning water is stopped, and if necessary, a drain port provided in the middle of the processing liquid circulation path 10 The liquid is directly discharged from the (not shown), the fiber product 1 is taken out, and the series of processing ends.

[0024] In the above cleaning method, a series of operation control is performed by previously inputting a value required for the operation control into a predetermined control panel (not shown) provided in the cleaning device. This is done by setting. At this time, the timing of the transition from the liquid replacement cleaning process in which the discharge of the high-temperature processing liquid and the supply of the normal temperature cleaning water to each other while directly exchanging heat from each other is performed in the processing tank 4 It is set so that the temperature sensor detects when the liquid temperature reaches 80 ° C.

[0025] Further, in the liquid replacement cleaning step, the optimum value of the temperature gradient due to the temperature drop caused by the liquid replacement is also input to the control panel in advance. As the above “optimum value of temperature gradient”, for example, the temperature drop from the temperature at the end of the dyeing process (X = 130 ° C) to the temperature at the end of the liquid replacement cleaning process (Y = 80 ° C) It may be set to input three values of X, Y, and という, which is performed for 20 minutes, or (130 ° C-80 ° C) / 1200 seconds = 0. It may be set to enter a numerical value indicating the temperature drop per unit time, such as 04 ° CZ seconds.

In FIG. 1, as indicated by a broken line A, when the actual temperature gradient is larger than the optimum value, that is, the temperature of the cleaning water supplied into the treatment tank 4 is low. If the liquid temperature in the treatment tank 4 falls too rapidly, an instruction is given to heat the liquid in the treatment tank 4 using the indirect heat exchanger 7 provided in the middle of the treatment liquid circulation path 10. Set so that the temperature gradient is reduced by heating to match or approximate the optimum value. In FIG. 1, as indicated by the alternate long and short dash line B, when the actual temperature gradient is smaller than the optimum value, that is, the temperature of the cleaning water supplied into the treatment tank 4 is too high. The liquid temperature in treatment tank 4 is If the temperature does not drop too much, the refrigerant is introduced into the indirect heat exchanger 7 to instruct the cooling of the liquid in the treatment tank 4, and the cooling increases the temperature gradient to match or approximate the optimum value. Set to

[0027] By this temperature gradient control, the processing end time of the liquid replacement cleaning process becomes constant regardless of the temperature of the supplied cleaning liquid, so that the processing end time becomes short and the cleaning becomes insufficient. In addition, there is no wasteful use due to excessive supply of cleaning water due to the long processing end time. This is the greatest feature of the present invention.

[0028] Moreover, according to the above cleaning method, since the high-temperature treatment liquid to be discharged and the supplied wash water are directly subjected to heat exchange, and the treatment liquid is discharged at a high temperature, oligomers, dye residues and the like are contained in the treatment liquid. It can be removed in a dissolved state, and the reduction cleaning treatment that is necessary for conventional polyester deep color dyeing can be omitted. This eliminates the need for steam and chemicals used to raise the temperature in the reduction cleaning process, and can reduce costs. In addition, since the oligomers and dye residues are not deposited and remain on the inner wall of the processing tank 4 and the like, the burden of maintenance such as cleaning the processing tank 4 periodically is greatly reduced. Have Since the amount of high-temperature treatment liquid discharged and the amount of cleaning water supplied are controlled to be equal to each other, the amount of liquid circulating in the treatment tank 4 is not changed even after shifting from the dyeing process to the cleaning process. Stable processing can be performed while maintaining a constant, resulting in a good finish.

[0029] In the present invention, the "high temperature processing liquid" is heated by the indirect heat exchange 7 provided in the processing liquid circulation path 10 and is set from the liquid temperature at the time of supply to a high temperature. ! The temperature is appropriately set depending on the type of treatment, the type of textile 1 and the like.

[0030] Further, in the present invention, "washing water" refers to water having a temperature lower than that of the high temperature treatment liquid to such an extent that the temperature of the high temperature treatment liquid can be lowered by heat exchange with the high temperature treatment liquid. Although it is used, its temperature is not particularly limited. Usually, clean water is used as it is. In addition, for the purpose of improving the cleaning effect or imparting a specific texture or function, it is possible to use a product added with an appropriate chemical.

[0031] Further, in the present invention, as a method for keeping the amount of liquid in the processing tank 4 constant by equalizing the discharge amount of the high temperature processing liquid and the supply amount of cleaning water, Total 17, 18 and In addition, the method is not limited to the method of controlling the flow rate of both using the on / off valves 15 and 16, and an appropriate method can be used. It is possible to provide a liquid level sensor in the processing tank 4 and control the on-off valves 15 and 16 so that the liquid level is always kept constant. Since the treatment liquid circulates in a ripple and it is difficult to specify the liquid level, it is preferable to control the flowmeters 17 and 18 and the on-off valves 15 and 16 in combination as in the above example.

[0032] In the liquid replacement cleaning process in which the high-temperature treatment liquid is discharged and the cleaning water is supplied at the same time, for example, as schematically shown in Fig. 2, the starting force is heated by indirect heat exchange 7 for a predetermined time. By keeping the liquid temperature the same as the high temperature during the dyeing process (this process is called “constant temperature washing step”), this heating is stopped and the high temperature drainage liquid similar to the above example is discharged. Only water washing can be performed. According to this method, the temperature at the time of cleaning is further increased, so that a more excellent cleaning effect can be obtained. Since the treatment liquid is discharged at a high temperature, oligomers and dye residues can be completely removed in a state dissolved in the treatment liquid, and the maintenance burden on the treatment tank 4 can be greatly reduced. .

[0033] Further, based on the same idea as described above, for example, as schematically shown in FIG. 3, after the dyeing process step, first, the high temperature processing liquid is discharged and the cleaning liquid is supplied. It is assumed that heating by the exchanger 7 is not performed, and when the liquid temperature in the treatment tank 4 is lowered to a slightly low temperature such as 100 to 120 ° C by direct heat exchange of both liquids, indirect heat exchange ^^ Heating by 7 may be started and a constant temperature washing step may be performed. That is, the energy cost can be further reduced by performing the constant temperature washing step in a state where the temperature is lowered to an appropriate temperature within a range in which impurities such as oligomers are not deposited.

[0034] As described above, the liquid temperature control in the liquid replacement cleaning step can be appropriately set according to the type of the object to be cleaned, processing conditions, chemicals used, and the like. It is possible to select a method that directly discharges heat and supplies cleaning water, or a method that uses indirect heat exchange7. In any case, however, it is important to control the temperature gradient so that it does not depend on the temperature of the cleaning water, so that the temperature gradient matches or approximates the optimum value.

[0035] In the above example, when the liquid temperature drops to 80 ° C, the on-off valve 15 is closed to stop taking out the high temperature processing liquid from the processing liquid discharge pipe 11, and the washing water is discharged to the high temperature. Liquid and heat exchange The direct cold water washing method is used to cool the circulating liquid by supplying it at a constant flow rate directly into the treatment tank 4 without changing it, but this method is not always necessary. However, the liquid temperature may be lowered to a low temperature range of 60 ° C! /. However, according to the above-mentioned direct cooling water washing method, since the washing water is supplied directly into the treatment tank 4 that can lower the temperature to a predetermined low temperature range in a shorter time, washing can be performed simultaneously with cooling. , Cleaning efficiency is further improved. In the conventional method, when the temperature is lowered to a low temperature range, it is difficult to cool the fiber product 1 with a smooth temperature gradient. Therefore, it has the advantage that it is difficult for wrinkles to occur. Therefore, it is preferable to adopt this method.

[0036] In the present invention, the type of fiber product to be treated is not particularly limited. For example, various synthetic fibers such as polyester, polyamide, and acrylic, blended products, and woven fabrics are used. Products, unionized products, cellulose fibers such as cotton, rayon and hemp, blended products, unionized products and unionized products. And the shape and form of the above-described finely-developed product may be any woven fabric, knitted fabric, non-woven fabric, product (garment) or the like.

[0037] In the present invention, any apparatus for treating and cleaning the above-mentioned textiles may be used as long as it is of a type that performs treatment with a treatment liquid circulating inside and outside the treatment tank. There is no problem. For example, in addition to the liquid flow processing apparatus shown in the above example, a package processing apparatus, a beam processing apparatus, a thread, a woven or knitted fabric, etc., which processes a fiber-like fiber product in a skein, cheese or corn shape Various types of processing devices such as a processing apparatus that processes the finely processed products in a state of being processed in a suspended manner or stacked in a flat shape can be given. Furthermore, the present invention can be applied to an airflow processing apparatus.

[0038] In the present invention, the treatment for the fiber product can be widely applied to various treatments such as relaxation processing, resin processing, and scouring in addition to the dyeing treatment.

Next, examples of the present invention will be described together with comparative examples.

Example

[Example 1]

Using the liquid flow treatment device shown in Fig. 6, the textiles were dyed and washed according to the following conditions. Textile: Polyester fabric (Polyester yarn 56dtexZ48f plain weave) 100kg Process chart: Follow Fig. 1. However, in the liquid replacement cleaning process, the temperature gradient from 130 ° C to 60 ° C is set to the optimum value, and if the temperature gradient is greater than the optimum value, heating is performed by indirect heat exchange 7 If the temperature gradient force is greater than the optimum value, in the case of cooling by the indirect heat exchanger 7 as well, the actual temperature gradient should be set to match or approximate the optimum value.

Agents used in the dyeing process:

Dye 5kg

Dispersant (Nitsuka Sun Salt RM-340, manufactured by Nikka Chemical) 600g

Acetic acid 600g

Bath ratio: 1Z12

Washing water'cooling water temperature: 15 ° C and 28 ° C

[Comparative Example 1]

The temperature gradient was controlled. Otherwise, in the same manner as in Example 1, the fiber product was dyed and washed.

[Comparative Example 2]

Using the conventional liquid flow treatment device shown in Fig. 4, the fiber products were dyed and washed according to the following conditions.

Textile product: the same as in Example.

Process chart: Follow Fig. 5.

Agents used in the staining process: the same as in the examples.

Agents used in the reduction cleaning process:

NaOH 1200g

Noidrosanore Fight 1200g

Bath ratio: Same as the example

[0043] The amount of steam and water (washing water, cooling water, etc.) used in Example 1 and Comparative Examples 1 and 2 was examined and summarized in Tables 1 to 3 below. In addition, for each fiber product obtained, friction fastness (according to JIS L-0849 method (dry, wet)), wash fastness (JIS L-0844 A4 method) ) And sweat fastness (according to JIS L-0848 A method [acid, alkali]) were evaluated, and the grades 1-5 were also shown.

[table 1]

[Table 2] Comparative Example 1

Water temperature 15. C Water temperature 28. Item C Process use amount Joint needle C use amount Total D Steam (k s) Heating 264.6 264.6

1 30 X hold 20.0 284.6 20.0 284.6 Temperature gradient correction

Temperature drop 3000 7000

(Washing water)

Temperature gradient correction

Water (cooling water)

(Liter) 4200 8200

Dyeing process

(Water supply) 1200 1200

Slow cooling (wash water) 0 0

Washing with water (Washing water) 0 0

Electric power (kw) All processes 25.8 25.8 25.8 25.8 Dye (ε) Dye processing 5000 5000 5000 5000 Auxiliary M340 Same as above 600 Cost 600 Cost

(g) Acetic acid Same as above 600 600

555 yen 555 yen Reducing agent N a OH Reduction cleaning 0 0

(g) Hydrosa Same as above

Rufuite 0 0 Various fastnesses of textiles are not good enough

(3-40) (4-5 grade)

Comparative Example 2

Item Process Usage p ρ "ί" 0

Steam (kg) Heating 264.6

1 3 0 "C hold 20.0 292.5

8 0 Hold 7.9

Temperature drop

(Cooling water) 3818

Dyeing process

Water (water supply) 1200 17268

(Little)

Slow cooling (wash water) 2500

Washing water (Washing water) 9750

Electric power (k w) All processes 29.0 29.0

Dye (g) Dyeing 5000 5000

Auxiliary R 3 4 0 Same as above 600 Cost

(g) Acetic acid Same as above 600

1053 jpy

Reducing agent NaOH Reduction cleaning 1200

(g) Hi Drosa Same as above

Rufuite 1200 Various fastness of textiles Good

(4th to 5th grade)

[0047] From the above results, in Example 1, the cleaning was performed properly regardless of whether the cleaning water was 15 ° C or 28 ° C, and it was as robust as the conventional product (comparative product 2). It can be seen that the one with the degree is obtained. On the other hand, in Comparative Example 1 where the temperature gradient is not properly controlled, when the washing water is 15 ° C, the maintenance time of the liquid replacement washing process is short, the washing treatment is insufficient, and the degree of robustness of the resulting fiber product is low. It can be seen that when the washing water is 28 ° C, the washing is excessive in the liquid replacement washing process and the cooling water is used excessively.

[0048] In addition, compared with Comparative Example 2 which is a conventional cleaning method, Example 1 shows that steam (except for the case where the water temperature is 15 ° C), water, electric power, and chemicals are used regardless of the temperature of the cleaning water. In both cases, the amount used can be greatly reduced, and the time required for the cleaning process can be greatly shortened, which means that a significant cost reduction can be realized.

Claims

The scope of the claims

The fiber product is loaded into the treatment tank and the treatment liquid circulating inside and outside the treatment tank is heated to a high temperature by indirect heat exchange provided in the middle of the circulation path, and the fiber product is processed by contacting it. The cleaning water is gradually supplied into the processing tank while the high temperature processing liquid is gradually discharged from the processing tank, and the discharged high temperature processing liquid and the supplied cleaning water are directly supplied. Liquid replacement cleaning process that heat-exchanges and lowers the liquid temperature in the treatment tank to a predetermined temperature while keeping the liquid quantity in the treatment tank constant by making the discharge amount of the high-temperature treatment liquid and the supply amount of cleaning water equal. When the optimum temperature gradient in the liquid replacement cleaning step is set in advance, and the actual temperature gradient is larger than the optimum value, heating with the indirect heat exchanger is performed, and If it is smaller than the optimum value, the indirect heat By performing the cooling by ^^, textiles cleaning method is characterized in that so as to actually match or approximate the optimum value the temperature gradient.