JPH11350334A - Treatment of fiber product and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for treating a fiber product, capable of effectively separating a residual dye not dyed on the fiber product and contained in a dyeing liquid drainage, omitting a water-washing process and largely reducing the cost of water used therein. SOLUTION: Treating liquid circulation routes 10-16 are formed on the outside of a treating tank 1 through a pump 12. Routes 25 and 31 used for separating and circulating the dyeing liquid, branched from a part of the treating liquid circulation routes 10-16 and returned to the treating tank 1 are disposed. A cooling device 28 and a filtration device 30 are disposed on the upstream and downstream sides, respectively, in the routes 25 and 31 used for separating and circulating the dyeing liquid.

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 refining 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.
A dye separation circuit having a cooler and a filter is provided, and after the dyeing of the textile product is completed, the treatment liquid is divided into the dye separation circuit and cooled by the cooler. A method for treating a fiber product, wherein the fiber product is returned.

According to a second aspect of the present invention, in order to achieve the above-described method, a processing liquid circulation path is formed outside the processing tank via a pump, and a part of the processing liquid circulation path is branched. And a dye separation circuit for returning to the treatment tank, a cooling device provided on the upstream side of the dye separation circuit, and a filter provided on the downstream side of the dye separation circuit. Processing device.

In the present 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 completion of the dyeing, the treatment liquid in the treatment tank is diverted to the dye separation circulation path, rapidly cooled to a desired temperature by a cooler, and then filtered by a filter and returned to the treatment tank. Circulate.

As a result, undyed dyes are captured by the filter. In particular, impurities such as oligomers dissolved in the treatment liquid and precipitated by cooling can be separated by the filter.

Therefore, the treatment liquid after the completion of the dyeing is decolorized, so that the conventional washing step can be omitted and the stain on the inner surface of the treatment tank can be prevented. In addition, the cloth is also cooled by cooling the processing liquid.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the embodiment shown in FIG. A downstream surface of the accumulation section in the accumulation tank 1 constituting the processing tank is formed in a tapered rising section 2, and a reel box 3 is disposed at the end of the rising section 2. An injection nozzle 4 is provided at a lower portion of the reel box 3, and a transfer pipe 5 is connected by piping from a downstream side of the injection nozzle 4 to a bottom surface on an upstream (rear) side of the accumulation tank 1. The transfer pipe 5 constitutes a circulation path for the treated fabric.

A reel 6 is provided in the reel box 3, and a processing 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 portion on the upstream side of the storage tank 1, and serves as a partition for separating the processing liquid 9 and the cloth 7 bonded endlessly at the time of normal dyeing.

A liquid reservoir 10 communicating with the inside of the tank 1 is provided at the bottom of the downstream side (front portion) of the storage tank 1, and the liquid reservoir 10 is connected to a pump 12 via a suction pipe 11, 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 of the reservoir 1 on the upstream side.
Is connected to the heat exchanger 15 through a pipe 18 branched from the outlet pipe 16. 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 release valve provided in an air release pipe 24 for reducing the pressure in the storage tank 1.

A branch pipe 25 for branching the processing liquid is branched from the outlet pipe 16 constituting the processing liquid circulation path, and serves as a cooling means for the processing liquid via a decolorization processing valve 26 and a flow rate control valve 27. It is connected to a cooler 28. The outlet pipe 29 of the cooler 28 is connected to a filter 30 which is a means for filtering the processing liquid, and the return pipe 31 is connected to the reservoir 1.

The outlet pipe 16 is provided with a thermometer 32 for detecting the temperature of the processing liquid, and the outlet pipe 29 is provided with a thermometer 33 for detecting the temperature of the processing liquid cooled by the cooler 28. .

As the filter 30, a membrane filter made of, for example, an ultra-membrane or a reverse osmosis membrane is used. The concentrated liquid mixed with the dye captured by the filter 30 is supplied to the discharge pipe 34 and the discharge valve 3.
The liquid is stored in the liquid storage part 36 through 5 and sent to a predetermined part by opening the drain valve 37.

Reference numeral 38 denotes a flow control valve. As described above, at the time of dyeing the cloth 7, the cloth 7 is arranged in an annular shape as shown in FIG.

Then, the decolorization valves 26 and 26a 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 heated treatment liquid is ejected from the ejection nozzle 4, and the ejection power causes the cloth 7 to circulate in the direction of the arrow to perform the dyeing treatment. This dyeing is performed at points A to C in FIG.
That is, the process is performed at points A to C in FIG.

Next, after the dyeing process is completed, ie, as shown in FIG.
After point C, the heating by the heat exchanger 15 is stopped, and the cooler 28 is cooled, the decolorization valves 26 and 26a are opened, and the pump 12 is driven. Thereby, the processing liquid pumped by the pump 12 circulates through the processing liquid circulation path and
And a part of the processing liquid is diverted from the outlet pipe 16 to the branch pipe 25, and circulates into the storage tank 1 through the cooler 28, the filter 30, the decolorization processing valve 26 a, and the return pipe 31.

Since the processing liquid is cooled by the cooler 28 by this circulation, the temperature of the processing liquid is detected by the thermometer 33, and the processing liquid is cooled to the set temperature. Note that the processing liquid can be cooled by using the heat exchanger 15 in combination. Due to the circulation of the treatment liquid, undyed dyes are captured by the filter 28. In particular, impurities such as oligomers dissolved and present in the treatment liquid are precipitated by cooling, and separated by the filter. Can be. The cooling and filtration of the above processing solution is shown in FIG.
Is performed in the range F from the point C to the point D, and then the liquid is drained. Therefore, the conventional water washing shown by E in FIG.

Next, a reverse immersion filter is used as the filter 30.
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. When the processing solution is cooled to 40 ° C. by the cooler 28 and circulated for about 20 to 30 minutes, the processing solution becomes almost colorless and the oligomer can be removed. At this time, the processing solution is removed by a spectrophotometer. As a result of the measurement, the absorbance was as close to 0 as possible.

Then, following the drainage, the washing was performed three times in the conventional method, but was omitted once, and the processing was completed. As a result, a processing result equivalent to the conventional one was obtained. Filter 3
The dye or the like captured at 0 is stored in the liquid storage section 36 from the discharge pipe 34 as a concentrated liquid, and is sent to a predetermined section by opening the drain valve 37. This concentrate can be used again for staining.

Further, as described above, the cooling temperature of the
By setting the temperature to 0 ° C., the durability of the reverse osmosis membrane of the filter 30 could be maintained for a long time. In the above embodiment,
This is an example in which the present invention is applied to a dyeing machine that circulates a fabric. However, the present invention can be used for other types of dyeing machines and other types of dyes, and is limited to the dyeing machine in the illustrated embodiment. It does not do.

[0026]

As described above, according to the invention of the present application, it is possible to separate and remove almost all of the undyed residual dye from the textile contained in the dyeing effluent, so that the washing step can be omitted and the processing time can be reduced. Shortening and the amount of water used can be greatly reduced.
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 diagram showing a conventional processing step.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Retention tank which is a processing tank 10, 11, 13, 16 ... Pipe which comprises a processing liquid circulation path 25, 31 ... Pipe which comprises a dye separation circulation path 28 ... Cooler 30 ... Filter

Claims (2)

[Claims] 1. A dyeing process for dyeing textiles at a predetermined temperature in a processing tank, wherein a dye separation circuit having a cooler and a filter is provided. And cooling the mixture with the cooler, followed by filtering with a filter and returning to a treatment tank. 2. A processing liquid circulation path is formed outside the processing tank via a pump, and a dye separation circulation path branched from a part of the processing liquid circulation path and returning to the processing tank is provided. And a cooling device provided on the upstream side and a filter provided on the downstream side.