JP4659939B2 - Textile product processing method and apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a processing method and apparatus for scouring and dyeing textile products (hereinafter also referred to as fabrics).
[0002]
[Prior art]
Conventionally, in the textile dyeing process, as shown in FIG. 3, for example, the temperature of the processing liquid is raised from about 20 ° C. (point A) to about 130 ° C. (point B), and this temperature is maintained for a certain time (point C). Until the dyeing is completed, the processing liquid is cooled and discharged at the point D after completion of the dyeing (the point C). The water was washed repeatedly with water, water, and drainage, and undyed dyes and other used chemicals were washed away.
[0003]
[Problems to be solved by the invention]
In the above conventional treatment method, in order to obtain the specified dyeing fastness, it is necessary to repeatedly drain and supply water, so that a large amount of water is required in the washing process of the fabric, and the treatment tank is filled with water. There is a problem that the dye is attached and the pot needs to be washed when changing colors.
[0004]
Therefore, an object of the present invention is to provide a textile processing method and apparatus capable of simplifying the water washing process and the pot washing.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the first invention described in claim 1 is for dyeing a textile product at a predetermined temperature in the treatment tank. After finishing the dyeing of the textile product, the treatment liquid in the treatment tank is used. Drain all or part of it into a storage tank outside the treatment tank,
The processing liquid discharged from the processing tank is cooled by a cooling means and then supplied to a filter, filtered by the filter, and the filtered liquid is supplied to a heat exchanger and then returned to the processing tank. Is a method for treating a textile product.
[0007]
The second invention of claim 2, a storage tank for reserving transferred the processing solution in the processing tank whole or in part, a filter for filtering takes out the treatment liquid in the liquid storage tank, the processing A cooling means for cooling the processing liquid before filtration taken out from the tank, a heat exchanger provided downstream of the filter, and a flow path for returning the processing liquid passed through the heat exchanger to the processing tank. It is the processing apparatus of the textiles characterized.
[0009]
In the above invention, the treatment liquid in the treatment tank is maintained at a constant temperature after heating, and the fabric is treated at this temperature, and the dyeing of the fabric almost reaches its limit after a predetermined time. After completion of the dyeing, all or a part of the processing liquid in the processing tank is transferred to the 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 the filter.
[0010]
As a result, the undyed dye is captured by the filter, and the treatment liquid is used for washing with water.In particular, impurities such as oligomers melted in the treatment liquid by cooling are deposited, Can be separated.
[0011]
Therefore, the processing solution after the dyeing is decolorized, so that the conventional water washing step can be omitted and the stain on the inner surface of the processing tank can be prevented.
[0012]
Furthermore, since the decolorized processing solution can be reused, no replenishing water is required.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described based on the example shown in FIG.
[0014]
A bottom surface on the downstream side of the stagnation portion in the stagnation tank 1 constituting the processing tank is formed in a tapered rising portion 2, and a reel box 3 is disposed at the end of the rising portion 2.
An injection nozzle 4 is provided at the lower part of the reel box 3, and a transfer pipe 5 is connected from the downstream side of the injection nozzle 4 to the upstream (rear) side bottom surface of the stagnation tank 1. The transfer pipe 5 constitutes a circulation path for the treated fabric 7 that is a textile product.
[0015]
A reel 6 is provided in the reel box 3, and a treatment fabric 7 is placed on the reel 6 in an endless manner across the stagnation tank 1 and the transfer pipe 5. The fabric 7 moves and circulates in the direction of the arrow by the ejection.
[0016]
A casing 8 made of a perforated plate is provided at the bottom on the upstream side of the stagnation tank 1, and serves as a partition wall for separating the endlessly bonded fabric 7 and the treatment liquid 9 during normal dyeing.
[0017]
A liquid reservoir 10 communicating with the interior of the tank 1 is provided at the bottom (front) bottom of the stagnation tank 1, and the liquid reservoir 10 is connected to a pump 12 via a suction pipe 11, and further discharged from the pump 12. The discharge pipe 13, the filter 14, the multi-tube heat exchanger 15, and the outlet pipe 16 are connected to the injection nozzle 4 from the side, and these constitute a processing liquid circulation path.
[0018]
A shower pipe 17 is disposed on the upper upstream side of the stagnation section 1 and connected to the heat exchanger 15 through a pipe 18 branched from the outlet pipe 16.
[0019]
19 is a gate valve, 20 is a water supply valve, 21 is a drain valve, 22 is a pressurization valve provided in a compressed air supply path, and 23 is an air vent valve provided in an air vent pipe 24 for decompressing the stagnation tank 1. The outlet pipe 16 is provided with a thermometer 25 for detecting the temperature of the processing liquid. 38 is a flow control valve.
[0020]
A branch pipe 30 that divides the processing liquid is branched into the suction pipe 11, and a filtration discharge valve 31 is provided in the branch pipe 30. The downstream side of the discharge valve 31 in the branch pipe 30 communicates with a liquid storage tank 32 provided outside the stagnation tank 1 constituting the processing tank. The capacity of the liquid storage tank 32 is formed to a capacity capable of storing the processing liquid contained in the stagnation tank 1 and the transfer pipe 5. A discharge pipe 33 communicates with the bottom of the liquid storage tank 32, a pump 34 is provided in the discharge pipe 33, and a 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 made of an ultra-membrane or a reverse osmosis membrane is used.
[0021]
A return pipe 36 is provided on the outlet side of the filter 35, and the return pipe 36 communicates with the suction pipe 11 through a water supply valve 37.
[0022]
The concentrated liquid mixed with the dye captured by the filter 35 is stored in the liquid storage section 41 through the discharge pipe 39 and the discharge valve 40, and is sent to a predetermined section by opening the drain valve 42.
[0023]
In addition, when the processing liquid discharged | emitted from the said branch pipe 30 is preset temperature, for example, 40 degreeC or more, it is desirable to cool a processing liquid before entering the said filter 35. FIG. Therefore, a cooling means for performing such cooling is provided. As the cooling means, piping may be used so as to use the heat exchanger 15, and the liquid storage as shown in FIG. You may provide the cooler 43 which cools a process liquid through the cooling water outside the tank 32. FIG. 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.
[0024]
As described above, when the fabric 7 is dyed, the processing liquid is put in the processing tank, and the fabric 7 is annularly arranged in the stagnation tank 1 and the transfer pipe 5 and joined endlessly as shown in the figure.
[0025]
Then, the discharge valve 31 and the water supply valve 37 are closed, the pump 12 is activated to circulate the treatment liquid in the treatment liquid circulation path, and the treatment liquid is heated to a predetermined temperature by the heat exchanger 15. The treatment liquid heated by the heat exchanger 15 is ejected from the ejection nozzle 4, and the fabric 7 is circulated and moved in the direction of the arrow by the ejection force to perform the dyeing process. This dyeing is performed at points A to C in FIG. 2, that is, points A to C in FIG.
[0026]
Next, after the dyeing process is completed, that is, after point C in FIG. 2, 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 inside of the stagnation tank 1 and the transfer pipe 5 is opened. All or part of the processing liquid is discharged into the liquid storage tank 32 and stored. 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 cooling means 43 cools the processing liquid to the set temperature.
[0027]
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 activated. Thus, the processing liquid in the storage tank 32 enters the stagnation tank 1 through the pump 34, the filter 35, the return pipe 36, the water supply valve 37, and the suction pipe 11. Further, when a part of the processing liquid in the processing tank 1 is transferred to the liquid storage tank 32, it is put into the stagnation tank through the pipe 13, the heat exchanger 15, and the pipe 16 by the pump 34 and the pump 12. In FIG. 2, G indicates a process for discharging the processing liquid to the liquid storage tank 32, H indicates a filtration process, and I indicates a return process to the retention tank 1. In this way, 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 and present in the treatment liquid can be precipitated and separated by the filter 35.
[0028]
Next, after the processing liquid filtered as described above is returned into the stagnation tank 1, the discharge valve 31 and the water supply valve 37 are closed, and the processing liquid is circulated through the stagnation tank 1, the suction pipe 11 and the pipe 16 by the pump 12. Then, the cloth 7 is circulated and moved, and the impurities adhering to the cloth 7 are rinsed and removed. In FIG. 2, J indicates a rinsing step.
[0029]
After the rinsing is completed, the treatment liquid is again discharged into the storage tank 32 as described above, if necessary, and then filtered through the filter 35 as described above to return to the stagnation tank 1 and the fabric is circulated again. And the process similar to said GJ is performed. After repeating this process as many times as necessary, the fabric is taken out. K in FIG. 2 indicates removal of the fabric.
[0030]
Next, a reverse osmosis filter is used as the filter 35, polyester fibers are used as the fabric 7, a disperse dye is used at 2% owf (dye (%) with respect to the fiber weight), and after dyeing at 130 ° C., An example in which the dye is separated in such a cooling step will be described.
[0031]
In the case of polyester fiber, the oligomer is dissolved when the treatment liquid temperature is 100 ° C. or more simultaneously with the filtration treatment of the undyed dye, but it has the property of being precipitated when cooled to a predetermined temperature. When the treatment liquid was cooled to below the first transition point (40 ° C.) of the polyester fiber by 43 and filtered with a filter 35, the treatment liquid became almost colorless and the oligomer could be removed. As a result of measuring with a spectrophotometer, the absorbance was infinitely close to 0.
[0032]
As described above, the treatment liquid was filtered and rinsed with the filtered treatment liquid. As a result, washing of the fabric with water and washing with a kettle was performed three times in the conventional method, but it became unnecessary. Therefore, re-watering became unnecessary.
[0033]
Further, since the treatment can be repeated while leaving components other than the dye, water can be reused 100% simply by adding an auxiliary agent to the next batch.
[0034]
Further, the dye or the like captured by the filter 35 is concentrated to be accumulated in the liquid reservoir 41 from the discharge pipe 39 and is sent to a predetermined portion by opening the drain valve 42. This concentrated solution can be used again for staining.
[0035]
Furthermore, the durability of the reverse osmosis membrane of the filter 35 could be maintained for a long time by setting the cooling temperature of the treatment liquid to 40 ° C. or lower by the cooler 43 as described above.
[0036]
In addition, although the said Example is an example which applied this invention to the dyeing machine which circulates a cloth, this invention can be used also for other types of dyeing machines, and other types of dyes. It is not limited to the dyeing machine of the examples.
[0037]
【The invention's effect】
As described above, according to the invention of the present application, residual dye that has not been dyed can be almost separated and removed from the fiber product contained in the dyeing waste liquid, so that this water can be used for rinsing and re-feeding. The washing step can be omitted, and the amount of water used can be greatly reduced. Furthermore, since the dye adhesion in the dyeing tank can be reduced, cleaning of the pot by color change can be simplified.
[Brief description of the drawings]
FIG. 1 shows an embodiment of the present invention and is a piping diagram with a section of a processing tank section.
FIG. 2 is a diagram showing processing steps of the present invention.
FIG. 3 is a view showing a conventional processing step.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Reservoir tank 10,11,13,16 which is a process tank ... Pipe 32 which comprises a process liquid circulation path ... Liquid storage tank 35 ... Filter 43 ... Cooler

Claims (2)

In the processing tank for dyeing textile products at a predetermined temperature, after finishing the dyeing of textile products, all or part of the processing liquid in the processing tank is discharged to a storage tank provided outside the processing tank,
The processing liquid discharged from the processing tank is cooled by a cooling means and then supplied to a filter, filtered by the filter, and the filtered liquid is supplied to a heat exchanger and then returned to the processing tank. A method for treating textile products. A liquid storage tank for transferring all or part of the processing liquid in the processing tank and storing it, a filter for taking out and filtering the processing liquid in the liquid storage tank, and cooling the processing liquid before filtration taken out from the processing tank And a flow path for returning the treatment liquid that has passed through the heat exchanger to the treatment tank.

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