JP2000154456A - Treatment of fiber products and the machine therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the separation efficiency of the residual dye left in the dye waste solution remaining unused and omit the water dyeing process. SOLUTION: Fiber products are dyed with the treatment solution at a prescribed temperature and the treatment solution is circulated through the circulation route. A branching pipe 43 is set to a part of the circulation route. A filtration unit 28 for filtering the treatment solution is set to the branching pipe 43. The returning pipe 44 is set to the treatment solution circulation route so that the branched solution is allowed to flow back to the circulation route.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a textile product (hereinafter referred to as "fiber product").
(Also referred to as a treated fabric) and an apparatus therefor.

[0002]

2. Description of the Related Art Conventionally, in the dyeing treatment of textile products,
As shown in FIG. 5, for example, in the case of polyester fiber,
The temperature of the treatment liquid is raised from about 20 ° C. (point A) to about 130 ° C. (point B), and the temperature is maintained for a certain period of time (up to point C).
From the point to the point C, the treatment liquid is cooled from the end of the dyeing (the point C), discharged at the point D, and then, as shown at the point E, water supply and drainage are repeated two to three times. And washed with water to wash off undyed dyes and used chemicals.

[0003]

In the above-mentioned conventional processing method, drainage and drainage are repeatedly performed in order 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 water washing step of the treated fabric, and that the dye adheres to the inside of the treatment 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 water washing step and washing in a pot.

[0005]

According to a first aspect of the present invention, a textile product is dyed with a processing liquid at a predetermined temperature and the processing liquid is passed through a processing liquid circulation path. In the circulating fiber, the processing liquid is taken out by branching from a part of the processing liquid circulation path, and the taken out processing liquid is filtered by a filter and returned to the processing liquid circulation path. This is the processing method of the product.

According to a second aspect of the present invention, in the first aspect of the present invention, the filter is provided by allowing the processing liquid to flow from one surface of the filter element to the other surface so that the non-deposited liquid in the processing liquid is removed. The residual dyes and the like are captured by the filter element, and the captured unattached residual dyes and the like are removed from the filter element by pumping a cleaning fluid different from the treatment liquid from the other surface to the one surface of the filter element. This is a method for treating textile products, which is configured to be backwashable.

According to a third aspect of the present invention, in order to achieve the method of the first aspect, a textile is dyed with a processing liquid at a predetermined temperature and the processing liquid is circulated in a processing liquid circulation path. In the thing, a branch pipe is provided in a part of the processing liquid circulation path, and a filter for filtering the processing liquid is provided in the branch pipe,
A textile product processing apparatus, further comprising a return pipe provided on a downstream side of the filter to return the filtered processing liquid to the processing liquid circulation path.

According to a fourth aspect of the present invention, in order to achieve the method of the second aspect, in the third aspect, the filter is moved from one surface of the filter element to the other surface. By allowing the treatment liquid to flow, the unreacted residual dyes and the like in the treatment liquid are captured by the filtration element, and the cleaning liquid other than the treatment liquid is pressure-fed from the other surface of the filtration element to one surface. It is configured to be capable of backwashing to remove trapped undeposited residual dyes and the like from the filter element, and is provided with a pumping means for the cleaning fluid and a discharge means for discharging the undeposited residual dyes and the like removed from the filter element. It is a processing device for textile products.

In the above-mentioned present invention, at the time of dyeing,
The treatment liquid is maintained at a constant temperature after heating, and the textile is dyed at this temperature, and after a predetermined time, dyeing of the textile reaches almost the limit. After completion of the dyeing, the treatment liquid is divided by a branch pipe, filtered by a backwashable filter, and returned into the treatment liquid circulation path. As a result, undyed dyes and fine impurities in the processing solution are captured by the filter, but oligomers or the like dissolved in the processing solution are precipitated depending on the temperature range and separated and captured by the filter. You can also.

Therefore, the processing solution after the dyeing is finished 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, by configuring the filter so that the filter element can be backwashed as in the second and fourth inventions, the filter element can be washed and regenerated, used repeatedly, and the filtrate temperature can be reduced. If the temperature is usually 80 ° C. or lower, backwashing can be carried out at any time and the filtration capacity can always be maximized.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described based on an embodiment shown in FIGS. In FIG. 1, a downstream bottom surface of a stagnant portion in a stagnant tank 1 constituting a processing tank is formed in a tapered rising portion 2, and a reel box 3 is disposed at an end of the rising portion 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 an upstream (rear) bottom surface of the storage tank 1. The stagnant tank 1 and the moving pipe 5 constitute a circulation path for a fiber product (hereinafter referred to as a 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 over the accumulation tank 1 and the transfer pipe 5. The treatment cloth 7 moves and circulates in the direction of the arrow by the treatment liquid injection.

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 wall for separating the processing cloth 7 and the processing liquid 9 which are endlessly bonded during normal dyeing.

At the downstream (front) bottom of the storage tank 1, there is provided a liquid storage section 10 communicating with the inside of the storage tank 1, and the liquid storage section 10 is connected to a pump 12 via a suction pipe 11, and further a pump 12 through a discharge pipe 13, a filter 14, a multi-tube heat exchanger 15, and an outlet pipe 16 from the discharge side of the injection nozzle 4.
And these constitute a processing liquid circulation path.

A shower pipe 17 is provided on the upper portion of the storage tank 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 section, and 23 is an air release valve provided in an air release pipe 24 for reducing the pressure in the storage tank 1. 26 is a flow control valve.

The outlet pipe 16 is provided with a thermometer 25 for detecting the temperature of the processing liquid, and the temperature of the processing liquid can be arbitrarily controlled by a temperature controller (not shown).

A branch pipe 43 for branching the processing liquid is branched from the discharge pipe 13 constituting the processing liquid circulation path. The branch pipe 43 includes a decolorization processing valve 33, a pump 27, and a flow control valve 34. The filter is connected to a filter 28 which is a means for filtering the processing liquid. A filter element 30 is arranged in the filter 28.

As shown in FIG. 2, the filter element 30 is formed by winding a filter cloth 30c around an outer periphery of a perforated tube 30b having a plurality of holes 30a formed therein, and a flow path 30d in the perforated tube 30b. Is communicated with the outflow channel 30e,
The outflow passage 30 e communicates with the return pipe 44.

The return pipe 44 is connected to the storage tank 1 constituting the processing liquid circulation path, and the return pipe 4
4 is provided with a filtrate circulation valve 35 and a check valve 45.
A return path 50 is connected to the filter 28, and a return valve 36 is provided in the return path 50. The downstream of the return path 50 is connected to a precoat tank 31 in which a precoat filter aid such as diatomaceous earth is stored. The precoat tank 31 is provided with a filter aid input lid 32 so as to be openable and closable. Furthermore,
A filter aid supply path 51 is connected to a lower end of the precoat tank 31, and the filter aid supply path 51 is connected to the branch pipe 43 via a circulation valve 37. Precoat tank 3
1 is provided with a pressure reducing valve 42.

At the lower end of the filter 28, a lower lid 29 is provided so as to be openable and closable as a discharging means for discharging unadhered residual dye and the like attached to the filter element 30 to the outside of the filter 28.
Further, a drain valve 38 is provided. An air supply valve 39 is provided above the filter 28. Further, a flow path 52 is branched from the return pipe 44 at an upstream side of the filtration circulation valve 35, and pressurized air from an air pressure feeding means (air source) 40a is supplied to the flow path 52. An air supply valve 40, a water supply valve 41 for supplying processing water from a water pumping means (water source) 41a for supplying water as a cleaning fluid, and a filtrate outlet valve 46 are further provided.

As described above, when dyeing the processing cloth 7, the processing cloth 7 is arranged in an annular shape as shown in FIG. Liquid).

The decolorizing valve 33 and the filtrate circulation valve 35
Is closed, the processing liquid is heated to a predetermined temperature by the heat exchanger 15, and the pump 12 is started to circulate the heated processing liquid in the processing liquid circulation path. The heated processing liquid is jetted from the jet nozzle 4, and the jetting power causes the processing cloth 7 to circulate in the direction of the arrow to perform the dyeing process. This dyeing is performed at points A to C in FIG. 4, that is, at points A to C in FIG.

Next, after the dyeing process is finished, that is, after the point C in FIG. 4, the heating by the heat exchanger 15 is stopped and the processing liquid is cooled. When the cooling starts, the decolorization valve 3
3. The filtrate circulation valve 35 is opened, and the pump 27 is driven. Thus, the processing liquid pumped by the pump 27 is filtered by the filter 2
8, circulates from the filtrate circulation valve 35 through the return pipe 44 into the storage tank 1.

Next, before the filtration process, the circulation valve 37 and the return valve 36 are opened, and a pre-coating filter aid (diatomaceous earth or the like) prepared in the pre-coat tank 31 flows into the branch pipe 43 from the circulation valve 37 and the pump 27. , Through the flow control valve 34 into the filter 28 together with the dyeing solution. As a result, the processing liquid flows from the outer surface of the filtration element 30 to the hole 30a.
As shown in FIG. 3, the filter aid adheres and deposits on the outer surface of the filter cloth 30 c wound around the filter element 30 to form the aid layer 60.
After the auxiliary agent layer 60 is formed to a predetermined thickness, the circulation valve 37 and the return valve 36 are closed.

Then, the undyed dye is captured by the auxiliary layer 60 formed on the filter element 30 by the circulation of the above-mentioned treatment liquid. Since the auxiliary layer 60 has fine gaps, the auxiliary layer 60 effectively captures fine dyes and the like. In this case, depending on the temperature range of the processing solution, oligomers and fine impurities dissolved in the processing solution can also be separated and captured from the processing solution.

The above-mentioned filtration is performed in the range from the point C to the point D in FIG. 4, and then the liquid is discharged. Therefore, the water washing shown in FIG. Filter 2 above
8 performs a backwashing operation for removing the auxiliary layer 60 attached to the filtration element 30 during and at the end of the dyeing process. This backwashing operation is usually performed at the filtrate temperature of 80 ° C. or lower by the following operation. This backwashing operation is controlled according to an almost automated program, and the procedure is as follows.

First, the pump 27 is stopped and the decolorizing valve 3 is stopped.
3. The filtrate circulation valve 35 is closed. Next, after the filter 28 is sealed, the drain valve 38 is opened, and pressurized air is supplied into the filter 28 by the air supply valve 39 to drain the dyeing treatment liquid in the filter 28. After draining, the filtrate outlet valve 46 is opened, and the above-mentioned air is pressed into the filter element 30 from outside to inside to dehydrate the auxiliary layer 60 attached to the filter element 30. After dehydration is completed, the air supply valve 39 is closed, and the filter 2
After releasing the pressure in 8, the lower lid 29 is opened. Thereafter, the air supply valve 40 is opened to feed the pressurized air into the filter element 30 under pressure, and the pressurized air adheres to the outer periphery of the filter element 30 by the air force ejected from the inner surface of the filter element 30 to the outer surface through the hole 30a. Dehydrated auxiliary layer 6
0 (cake) is peeled off and discharged from the lower lid 29.

After the auxiliary layer 60 is discharged, the air supply valve 40 is closed and the water supply valve 41 is opened to supply water into the filtration element 30, and the filtration element 30 is washed with the pressurized water.
Thereby, the filtering element 30 can always exhibit the maximum filtering ability.

Next, diatomaceous earth is used as an auxiliary agent in the pre-coating of the filter element 30, polyester fiber is used as a treatment cloth, and a disperse dye is used at 2% owf (dye (%) based on fiber weight) at 130 ° C. An example in which the dye is separated in the cooling step as described above will be described later.

When a polyester fiber is dyed with a disperse dye, most of the dye is exhausted by the fiber. However, depending on the dyeing concentration, if the dye concentration is about 2% owf, a considerable amount of undyed dye remains. Even after dyeing, the treatment liquid remains dark, but this is filtered using the above-mentioned filter 28 for about 20 to
After circulating for 40 minutes, the treatment liquid became almost colorless, and further, suspended matters such as oligomers and fluff could be removed. As a result of measuring the treatment liquid at this time with a spectrophotometer, the absorbance was close to zero. Obtained.

After that, following the drainage, the water washing was performed two or three times in the conventional method, but was omitted once, and the processing was completed. As a result, the same processing result as the conventional one was obtained. Although the above embodiment is an example in which the present invention is applied to a dyeing machine that circulates a treated fabric, the present invention is also applicable to other types of dyeing machines such as other cheese dyeing machines and beam dyeing machines, and also to other types of dyeing machines. It is also possible to use the dyes of the type described above, and it is not limited to the dyeing machines and dyes of the above embodiments.

[0033]

As described above, according to the invention of the present application, it is possible to almost completely separate and remove the undyed residual dye from the textile product contained in the dyeing effluent.
The processing time can be reduced and the amount of water used can be significantly 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 partially cut-away side view showing details of a filtration element of the filter in FIG. 1;

FIG. 3 is a view in which an auxiliary agent has adhered to the filtration element of FIG. 2;

FIG. 4 is a view showing a processing step of the present invention.

FIG. 5 is a view showing a conventional processing step.

[Explanation of symbols]

 1, 10 to 16: Treatment liquid circulation path 43: Branch pipe 28: Filter 29: Lower cover 30 for discharge 30: Filtration element 41: Water supply valve 41a: Pumping means for fluid

Claims (4)

[Claims] 1. A method for dyeing a textile with a processing liquid at a predetermined temperature and circulating the processing liquid in a processing liquid circulation path, wherein the processing liquid is branched off from a part of the processing liquid circulation path, and the processing liquid is taken out. A method for treating textile products, wherein the treated liquid is filtered by a filter and returned to the treatment liquid circulation path. 2. The filter, wherein the processing liquid is allowed to flow from one surface of the filtration element to the other surface to capture unreached residual dyes and the like in the processing liquid by the filtration element. 2. The backwashing device according to claim 1, wherein a cleaning fluid different from the treatment liquid is pumped from one side to one side to remove the trapped unadhered residual dye and the like from the filtration element. How to treat textile products. 3. A method for dyeing textiles with a processing liquid at a predetermined temperature and circulating the processing liquid in a processing liquid circulation path, wherein a branch pipe is provided in a part of the processing liquid circulation path, and the branch pipe is processed. A fiber product processing apparatus, comprising: a filter for filtering a liquid; and a return pipe provided downstream of the filter for returning the filtered processing liquid to the processing liquid circulation path. 4. The filtration device allows the treatment liquid to flow from one surface of the filtration element to the other surface, thereby catching unreached residual dyes and the like in the treatment liquid by the filtration element. A backwashing device that removes the captured unattached residual dyes and the like from the filtration element by pumping a cleaning fluid different from the treatment liquid from one side to one surface, and a means for pumping the cleaning fluid and the filtration element. 4. An apparatus for treating textile products according to claim 3, further comprising a discharge means for discharging the undeposited residual dyes and the like removed from the paper.