JP2001164481A - Method for treating fiber product and apparatus for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively separate residual dyes included in a dye waste liquid and undyeing to fiber products, omit a water-washing process and remarkably reduce the amount of water to be used. SOLUTION: This device for treating fiber products consists of a liquid storage tank 32 which stores by transferring whole or a part of treating liquid in a treating tank 1, a filter 35 for taking out and filtering the treating liquid in the liquid storing tank 32 and a flow channel for returning the filtered treating liquid filtered by the filter 35 to the aforesaid treating tank 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for scouring and dyeing textile products (hereinafter also referred to as "fabric").

[0002]

2. Description of the Related Art Conventionally, in the dyeing treatment of textile products,
As shown in FIG. 3, for example, the treatment liquid is heated to about 20 ° C. (point A).
To about 130 ° C. (point B), hold this temperature for a certain period of time (up to point C), dye from point A to point C, and finish the dyeing (point C). After cooling and discharging at point D, as shown at point E, water supply and drainage were repeated and washed twice or three times to wash off undyed dyes and other used chemicals.

[0003]

In the above-mentioned conventional processing method, drainage is repeatedly performed to obtain a specified color fastness.
Since the water supply needs to be repeated, there is a problem that a large amount of water is required in the washing step of the fabric, and the dye adheres to the inside of the processing tank, so that the kettle needs to be washed at the time of color change.

Accordingly, an object of the present invention is to provide a method and an apparatus for treating textile products, which can simplify the above-mentioned washing step and washing in a pot.

[0005]

Means for Solving the Problems In order to solve the above-mentioned problems, a first invention according to claim 1 is a method for dyeing a textile at a predetermined temperature in a processing tank.
After the dyeing of the textile product is completed, the processing liquid in the processing tank is entirely or partially discharged into a storage tank provided outside the processing tank, and the processing liquid in the storage tank is filtered by a filter to be transferred to the processing tank. A method for treating a fiber product, wherein the fiber product is returned.

According to a second aspect of the present invention, there is provided a method for treating textile products according to the first aspect, wherein the treatment liquid is cooled by a cooler and supplied to a filter.

According to a third aspect of the present invention, there is provided a storage tank for transferring and storing all or a part of the processing liquid in the processing tank;
An apparatus for treating textile products, comprising: a filter for taking out and filtering the treatment liquid in the storage tank; and a flow path for returning the treatment liquid filtered by the filter to the treatment tank.

According to a fourth aspect of the present invention, in the third aspect of the present invention, there is provided an apparatus for treating textile products, wherein a cooling means for cooling a treatment liquid is provided upstream of the filter.

In the above invention, the processing liquid in the processing tank is maintained at a constant temperature after heating, the cloth is processed at this temperature, and the dyeing of the cloth reaches almost the limit after a lapse of a predetermined time. After the completion of the dyeing, all or a part of the processing liquid in the processing tank is transferred to a liquid storage tank, and then filtered by a filter and returned to the processing tank. If necessary, the treatment liquid is cooled and supplied to a filter.

As a result, undyed dye is captured by the filter, and the treated liquid is used for washing.
In particular, impurities such as oligomers which are melted and present in the treatment liquid by cooling can be precipitated and separated by a filter.

Therefore, the processing solution after the dyeing is decolorized, so that the conventional washing step can be omitted and the stain on the inner surface of the processing tank can be prevented.

Further, since the decolorized processing solution can be reused, no replenishing water is required.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the embodiment shown in FIG.

The downstream side bottom surface of the accumulation section in the accumulation tank 1 constituting the processing tank is formed in a tapered rising section 2,
A reel box 3 is arranged at the end of the rising portion 2. An injection nozzle 4 is provided at a lower portion of the reel box 3, and the storage tank 1 is provided from a downstream side of the injection nozzle 4.
A transfer pipe 5 is connected through a pipe to the bottom surface on the upstream (rear) side of the container.

A reel 6 is provided in the reel box 3, and a treated cloth 7 is hung on the reel 6 and is disposed endlessly across the accumulation tank 1 and the transfer pipe 5. The cloth 7 is moved and circulated in the direction of the arrow by the ejection of the processing liquid.

A casing 8 made of a perforated plate is provided at the bottom of the accumulation tank 1 on the upstream side, and serves as a partition for separating the processing liquid 9 and the cloth 7 bonded endlessly during normal dyeing.

A liquid reservoir 10 communicating with the inside of the tank 1 is provided at the bottom (downstream side) of the storage tank 1, and the liquid reservoir 10 is connected to a pump 12 via a suction pipe 11, and further a pump 12. The discharge nozzle 12 is connected to the injection nozzle 4 via a discharge pipe 13, a filter 14, a multi-tube heat exchanger 15, and an outlet pipe 16, and these constitute a treatment liquid circulation path.

A shower pipe 17 is provided at the upper portion on the upstream side of the accumulation section 1.
Is connected to the heat exchanger 15 through a pipe 18 branched from the outlet pipe 16.

Reference numeral 19 denotes a gate valve, reference numeral 20 denotes a water supply valve, reference numeral 21 denotes a drain valve, reference numeral 22 denotes a pressurization valve provided in a compressed air supply path, and reference numeral 23 denotes an air release valve which is provided in an air release pipe 24 for reducing the pressure in the storage tank 1. ing. The outlet pipe 16 is provided with a thermometer 25 for detecting the temperature of the processing liquid. 38 is a flow control valve.

A branch pipe 30 for branching the processing liquid is branched from the suction pipe 11, and the branch pipe 30 is provided with a discharge valve 31 for filtration. The downstream side of the discharge valve 31 in the branch pipe 30 is connected to a liquid storage tank 32 provided outside the storage tank 1 constituting the processing tank. The capacity of the liquid storage tank 32 is formed so as to be capable of storing the processing liquid contained in the storage tank 1 and the transfer pipe 5. A discharge pipe 33 communicates with the bottom of the liquid storage tank 32, and a pump 34 is provided in the discharge pipe 33. The discharge pipe 33 on the discharge side of the pump 34 communicates with a filter 35. As the filter 35, for example, a membrane filter composed of an ultra-membrane or a reverse osmosis membrane is used.

A return pipe 36 is provided at the outlet side of the filter 35, and the return pipe 36 communicates with the suction pipe 11 via a water supply valve 37.

The concentrated liquid mixed with the dye captured by the filter 35 is discharged through the discharge pipe 39 and the discharge valve 40 to the liquid reservoir 4.
1 and is sent to a predetermined portion by opening the drain valve 42.

When the processing liquid discharged from the branch pipe 30 is at a set temperature, for example, 40 ° C. or higher, it is desirable to cool the processing liquid before entering the filter 35. Therefore, a cooling means for performing such cooling is provided. As the cooling means, a pipe may be provided so as to use the above-described heat exchanger 15, and as shown in FIG. A cooler 43 may be provided outside the tank 32 to cool the processing liquid by passing cooling water. In order to operate such a cooling means, a thermometer 44 for detecting the temperature of the processing liquid is installed in the liquid storage tank 32, and the cooler 43 is operated when the temperature is equal to or higher than a set temperature.

As described above, when dyeing the cloth 7, the processing liquid is put into the processing tank, and the cloth 7 is arranged in the storage tank 1 and the transfer pipe 5 in an annular shape as shown in FIG. Join.

Then, the discharge valve 31 and the water supply valve 37 are closed,
The pump 12 is activated to circulate the processing liquid through the processing liquid circulation path, and the heat exchanger 15 heats the processing liquid to a predetermined temperature. The processing liquid heated by the heat exchanger 15 is supplied to the ejection nozzle 4
The cloth 7 is circulated and moved in the direction of the arrow by the ejection power to perform the dyeing process. This dyeing is performed at points A to C in FIG. 2, that is, at points A to C in FIG.

Next, after the dyeing step is completed, ie, as shown in FIG.
After the point C, the heating by the heat exchanger 15 is stopped, the temperature is cooled to an arbitrary temperature, the discharge valve 31 is opened, and the processing liquid in the accumulation tank 1 and the transfer pipe 5 is entirely or partially discharged to the liquid storage tank 32. And store it. At this time, when the processing liquid stored in the liquid storage tank 32 is higher than a set temperature, for example, 40 ° C., the processing liquid is cooled by the cooling unit 43 to the set temperature.

Next, when all of the processing liquid in the processing tank 1 has been transferred to the liquid storage tank 32, the drain valve 31 is closed, the water supply valve 37 is opened, and the pump 34 is started. Thus, the processing liquid in the storage tank 32 enters the storage tank 1 through the pump 34, the filter 35, the return pipe 36, the water supply valve 37, and the suction pipe 11. Further, a part of the processing liquid in the processing tank 1 is stored in the liquid storage tank 3.
In the case of transfer to 2, the pump 34 and the pump 12 enter the storage tank through the pipe 13, the heat exchanger 15, and the pipe 16. In FIG. 2, G indicates a step of discharging the processing liquid to the storage tank 32, H indicates a filtration step, and I indicates a step of returning the processing liquid to the storage tank 1.
In this manner, the undyed dye is captured by the filter 35 as the treatment liquid passes through the filter 35. At this time, by cooling the treatment liquid to a predetermined temperature by the cooling means 43, impurities such as oligomers dissolved in the treatment liquid are precipitated, and can be separated by the filter 35.

Next, after the treatment liquid filtered as described above is returned to the storage tank 1, the discharge valve 31 and the water supply valve 37 are closed, and the processing liquid is supplied by the pump 12 to the storage tank 1, the suction pipe 11, and the pipe. The fabric 7 is circulated and moved by circulating the fabric 16, and impurities and the like adhering to the fabric 7 are rinsed and removed. In FIG.
The rinse step is shown.

After the rinsing is completed, if necessary, the treatment liquid is discharged again into the storage tank 32 as described above, and then filtered through the filter 35 as described above, returned to the storage tank 1, and then re-washed. Are circulated, and the same steps as those of G to J are performed. After repeating this step as necessary, the fabric is taken out. K in FIG. 2 indicates removal of the fabric.

Next, a reverse immersion filter is used as the filter 35,
Polyester fiber is used as the cloth 7, and the disperse dye is 2%.
owf (dye (%) based on fiber weight)
An example in which the dye is separated at the above cooling step after dyeing at ° C. will be described.

In the case of polyester fiber, the oligomer is dissolved when the temperature of the treatment liquid is 100 ° C. or higher at the same time as the filtration treatment of the undyed dye, but the oligomer is dissolved when cooled to a predetermined temperature. The processing liquid is cooled by the cooler 43 at the first transition point of the polyester fiber or lower (40 ° C.).
When the solution was cooled down and filtered with the filter 35, the treatment solution became almost colorless, and further, the oligomer could be removed. As a result of measuring the treatment solution at this time by a spectrophotometer, the absorbance was almost zero. The value was obtained.

As described above, the treatment liquid was filtered and rinsed with the filtered treatment liquid. As a result, the cloth was washed with water and the kettle three times in the conventional method, but became unnecessary. Therefore, re-watering became unnecessary.

Further, since the treatment can be repeated while leaving components other than the dye, 100% of the water can be reused only by adding an auxiliary agent to the next batch.

The dye and the like captured by the filter 35 are
It is stored in the liquid storage part 41 from the discharge pipe 39 as a concentrated liquid,
When the drain valve 42 is opened, it is sent to a predetermined portion. This concentrate can be used again for staining.

Further, by setting the cooling temperature of the processing liquid to 40 ° C. or less by the cooler 43 as described above,
5 was able to maintain the durability of the reverse osmosis membrane for a long time.

The above embodiment is an example in which the present invention is applied to a dyeing machine that circulates a cloth, but the present invention can be used for other types of dyeing machines and other types of dyes. However, the present invention is not limited to the dyeing machine of the embodiment shown in the drawings.

[0037]

As described above, according to the invention of the present application, it is possible to separate and remove most of the undyed residual dye from the textile contained in the dyeing effluent. It is possible to omit the washing step by re-supplying water, and to greatly reduce the amount of water used. Further, since the adhesion of the dye in the dyeing tank can be reduced, the washing of the kettle by changing the color can be simplified.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention, and is a piping diagram in which a processing tank section is sectioned.

FIG. 2 is a view showing a processing step of the present invention.

FIG. 3 is a view showing a conventional processing step.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Storage tank which is a processing tank 10, 11, 13, 16 ... Pipe which comprises a processing liquid circulation path 32 ... Storage tank 35 ... Filter 43 ... Cooler

Claims (4)

[Claims] 1. A method for dyeing a textile at a predetermined temperature in a processing tank, wherein after the dyeing of the textile is completed, the processing liquid in the processing tank is completely or partially stored in a liquid storage tank provided outside the processing tank. A method for treating textile products, comprising discharging the treated liquid in the storage tank, filtering the treated liquid with a filter, and returning the treated liquid to a treatment tank. 2. The method according to claim 1, wherein the treatment liquid is cooled by a cooler and supplied to a filter. 3. A storage tank for transferring and storing all or a part of the processing liquid in the processing tank, a filter for removing and filtering the processing liquid in the storage tank, and a processing liquid filtered by the filter. And a flow path for returning to the processing tank. 4. The textile product processing apparatus according to claim 3, wherein a cooling means for cooling the processing liquid is provided upstream of the filter.