JPH08296166A - Air current-type treatment of rope-like fiber product and treating apparatus - Google Patents

Abstract

PURPOSE: To enable cooling by specific latent heat of vaporization due to pressure control of circulating air current without using cooling medium such as cooling water in a cooling step in an air current type treating apparatus. CONSTITUTION: In a temperature-raising and constant temperature retaining step of treating fluid, a fabric is treated with gas-liquid mixed fluid or only liquid fluid and in a cooling step, the fabric is treated by pressure control of circulating air current. A pressure sensor 30 for detecting pressure in an air current type treating apparatus and a pressure control valve 32 for cooling control connected to the air current type treating apparatus are provided and a high-temperature discharge valve 12 connected to a residence tank and the pressure controlling valve 32 are controlled based on signal from a pressure sensor 30 by a control part 33 and pressure in the treating apparatus is gradually reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an airflow type treatment method for rope-like fiber products such as cloth and a treatment apparatus therefor, and more particularly to a treatment method and treatment apparatus for cooling by controlling the pressure of a circulating airflow in a cooling step. Regarding

[0002]

2. Description of the Related Art The applicant of the present invention first proposed an airflow type rope-shaped fiber product processing apparatus (hereinafter referred to as a processing apparatus) for performing dyeing and other processing while circulatingly moving a rope-shaped fiber product such as cloth by an airflow. (JP-A-6-73658)
Issue).

This processing apparatus mixes and supplies a processing liquid such as a dyeing liquid into an air flow for circulating and moving a textile product in a processing tank, and a heated gas-liquid mixed fluid composed of the processing liquid and the air flow is fed to the textile product. By performing a treatment such as dyeing while spraying and circulating the treatment in the treatment tank, an extremely low bath ratio is realized, and a tensionless relaxation treatment is performed to shorten the treatment time.

[0004]

By the way, in the above-mentioned conventional airflow type processing apparatus, when the processing such as dyeing is completed,
Although the treated cloth is circulated and cooled to at least about 80 ° C., and then the treatment liquid stored in the bottom of the treatment tank is discharged, the mixed fluid of the treatment liquid and the gas is also discharged from the treatment fluid injection unit in the cooling process. The jetting was continued, and the mixed fluid was cooled by heat exchange using a coolant such as cooling water. For this reason, a cooling medium such as cooling water is indispensable, and indirect cooling is performed by interposing the cooling medium, which tends to prolong the cooling time. Further, when the temperature of the treatment fluid is lowered to some extent, the oligomers eluted from the treated cloth may adhere to the cloth again. Further, since the treatment liquid is sprayed onto the cloth even in the cooling step, the heat quantity of the cloth is maintained at a relatively high level, and there is a problem that the cooling time becomes long in combination with the indirect cooling by the refrigerant.

An object of the present invention is to provide an airflow type processing method and a processing apparatus capable of preventing the adhesion of oligomers by the cooling effect of latent heat of vaporization without relying on a cooling medium such as cooling water in the cooling step.

[0006]

As a technical means for achieving the above object, in the method of the present invention, a transfer passage for transferring a rope-shaped fiber product in a substantially straight state and a retention tank for transferring in a meandering state are connected. To form an annular fabric treatment passage, and to put the endless treatment fabric into the passage, and at the same time, to the treatment fluid injection part provided at the upstream end of the transfer passage from the retention tank via the pump and the heat exchanger. A treatment liquid circulation passage for supplying a treatment liquid to the treatment tank, and an air flow circulation passage for supplying an air flow to the treatment fluid injection unit provided at the upstream end of the transfer passage from the retention tank via a blower and a heat exchanger, In an air flow type processing method for circulating treatment of a treated cloth by injecting a treated fluid of a predetermined temperature from a treated fluid ejecting section, in the step of raising the temperature of the treated fluid and maintaining a constant temperature, a gas-liquid mixed fluid or liquid Performs processing of dyeing etc. In German fluid, the cooling step, characterized in that so as to cool the pressure control of the circulating air flow.

In the cooling step, after the high temperature liquid is drained, the pressure in the gas stream type processing device may be gradually lowered and cooled by the latent heat of vaporization. In this case, a high temperature drainage valve is connected to the retention tank, and a pressure sensor for detecting the pressure in the air flow type processing device and a cooling control pressure control valve connected to the air flow type processing device are provided, and the pressure sensor The high temperature drainage valve and the cooling control pressure adjusting valve are controlled by the control unit based on the signal of.

[0008]

In the present invention, in the cooling step, the fabric is circulated by injecting only the gas without injecting the treatment liquid from the treatment fluid ejecting section, and the fabric is cooled by the latent heat of vaporization by the pressure control of the circulating air flow. The cloth can be cooled directly and efficiently without using a coolant such as cooling water.

Further, the amount of the treatment liquid impregnated into the cloth is extremely small, and even if the temperature of the treatment liquid is lowered and dissolved impurities such as oligomers appear on the surface of the cloth, the amount thereof is very small, and the cloth is Since it is in a semi-dried state, there is little risk of reattachment of oligomers. Further, since the amount of the treatment liquid impregnated in the fabric can be reduced by the air flow treatment, the amount of heat accumulated in the fabric is small, and the cooling time is shortened in combination with the efficient cooling by the latent heat of vaporization by the pressure control.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. FIG. 1 is a schematic configuration diagram of the airflow type processing apparatus of the present invention.

The airflow type processing apparatus shown in FIG. 1 has an annular processing tank 1, a processing liquid circulation path 2 and an airflow circulation path 3 attached to the processing tank 1, and a transfer passage for the processing tank 1 (described later). The processing liquid jetting unit 4 and the processing airflow jetting unit 5 provided at the upstream end of the main part constitute a main part, and are generated by the processing liquid and the processing airflow supplied from the processing liquid jetting unit 4 and the processing airflow jetting unit 5. The rope-shaped fiber product (fabric) a that circulates and moves in the processing tank 1 is processed under high temperature and high pressure by the gas-liquid mixed fluid.

Specifically, the processing tank 1 includes a header portion 7 containing a drive reel 6, a transfer passage 8 extending from the header portion 7 for transferring the textile product a in a substantially straight state, and the transfer thereof. An inlet side is connected at a downstream end of the passage 8 and the header part 7 and an outlet side are connected to each other, and a retention tank 9 for retaining and transferring the fiber product a in a meandering state is connected to the inside, and an endless fiber product a is formed inside. Are stored. The portion from the inlet side to the middle portion of the bottom of the retention tank 9 has a double bottom structure having a porous nest plate 10 so that the treatment liquid dropped from the textile product a and the like can be separated. .

The processing liquid circulation passage 2 connects the liquid reservoir 13 provided at the bottom of the retention tank 9 and the upstream end of the transfer passage 8 via a pump 14, a heat exchanger 15 and an opening / closing valve 16. The processing liquid is circulated between the retention tank 9 and the transfer passage 8. The high temperature drain valve 12 is connected to the liquid reservoir 13.

The air flow circulation path 3 connects the upper part of the retention tank 9 and the upstream end of the transfer passage 8 via a blower 17 and a heat exchanger 18, and the air flow between the retention tank 9 and the transfer passage 8 is established. Circulate. Further, in the branch passage 19 between the upstream end of the transfer passage 8 and the downstream of the heat exchanger 18, the on-off valve 1 is provided.
9 and 20 are provided.

At the upstream end of the transfer passage 8, the treatment liquid such as the dyeing liquid supplied by the treatment liquid circulation passage 2 is introduced into the textile product a.
A treatment liquid ejecting unit 4 for injecting into the fiber product a and an air flow ejecting unit 5 for ejecting the air flow supplied by the air flow circulation path 3 into the textile product a are provided, and are supplied from the treatment liquid ejecting unit 4 and the air flow ejecting unit 5. The textile product a is treated with the treatment liquid and the gas-liquid mixed fluid generated by the air flow.

Specifically, the treatment liquid ejecting section 4 and the air flow ejecting section 5 are annular ones formed around the inner peripheral surface of the transfer passage 8, and the inner guide 25 extending to the downstream side of the transfer passage 8.
And an outer guide 26 which is arranged so as to partially overlap the outer circumference of the inner guide 25 and extends upstream of the transfer passage 8, and finally has a fold-back injection that faces the downstream of the transfer passage 8. The passage 27 is formed.

The features of the present invention are as follows. That is, the pressure sensor 30, the pressure gauge 31, and the cooling control pressure adjusting valve 32 are connected to a part of the processing device, for example, the header portion 7, and the detection result of the pressure sensor 30 is input to the control portion 33, and the control portion 3
The cooling control pressure control valve 32 and the high-temperature drainage valve 12 are opened / closed based on the command from the controller 3. The control unit 33 stores the optimum speed with respect to the pressure reduction speed in the processing device in the cooling process, and gradually reduces the pressure from, for example, 3 kg pressure to 1 kg pressure over about 10 minutes based on the detection result of the pressure sensor. Ready to run.

The processing operation of the airflow type processing apparatus having the above-mentioned structure will be described below. First, during the processing of the textile product a, the high temperature drain valve 12 is closed and the opening / closing valves 16, 20 and 21 are opened. High-pressure gas is introduced into the processing apparatus through the pressure control valve 32, and the pressure control valve 32 is closed when the pressure inside the processing apparatus reaches a predetermined pressure (for example, 3 kg pressure). In this state, pump 1
4 supplies the processing liquid in a high temperature state to the processing liquid injection unit 4 at the upstream end of the transfer passage 8 of the processing tank 1 (see the broken line arrow in FIG. 1), and the processing liquid injection unit 4 downstream of the transfer passage 8 from the processing liquid injection unit 4. Jet toward the side. At the same time, the air flow sucked from the upper part of the retention tank 9 through the heat exchanger 18 by the operation of the blower 17 is brought to a high temperature state through the air flow circulation path 3
(See the broken line arrow in FIG. 1), and the air is injected toward the downstream side of the transfer passage 8 from the air flow injection part 5.

The injection of the high-temperature processing liquid and the high-temperature processing liquid from the processing liquid injection unit 4 and the airflow injection unit 5 causes the processing liquid to be mixed in the airflow at the upstream end of the transfer passage 8 to form a high-temperature gas. It becomes a liquid mixed fluid and is jetted toward the textile product a, and the treatment liquid permeates into the textile product a.
The textile product a is transferred in the transfer passage 8 by the jetting of the treatment liquid and the airflow from the treatment liquid jetting unit 4 and the airflow jetting unit 5, and in combination with the sliding action due to its own weight, from the inlet side of the retention tank 9 to the intermediate portion. It reaches the section, stays in the middle section, becomes relaxed, and gradually moves horizontally. The textile product a is extruded from the middle portion of the retention tank 9 toward the outlet side, pulled up to the header portion 7 by the drive reel 6, and the above-described operation is repeated again. On the other hand, the surplus processing liquid is dripped from the porous web 10 at the bottom of the retention tank 9 and stored in the liquid reservoir 13, collected in the processing liquid circulation path 2 and supplied again to the processing liquid jetting unit 4.

After the circulating treatment of the textile product a with the treatment liquid and the gas is performed for a predetermined time, the drain valve 12 is opened to drain the hot liquid. After the high temperature drainage, the cooling process is started. In this cooling process, the inside of the processing apparatus is gradually depressurized by a command from the control unit 33. That is, the drain valve 12 is opened at a predetermined opening to discharge the gas (steam) in the processing apparatus, and the pressure control valve 32 is used to partially supplement the pressure drop in the processing apparatus due to the discharge. Is opened at a predetermined opening and high-pressure gas is introduced. As a result, the pressure in the processing device gradually decreases, and the processing liquid impregnated in the fiber product a is rapidly cooled by the latent heat of vaporization.

In the above embodiment, the high temperature liquid was drained before the cooling step, but it is also possible to cool the liquid by lowering the pressure without discharging the high temperature liquid. In this case, as compared with the high temperature liquid drain first. Although some cooling time is required, the effect of preventing re-adhesion of oligomers and the like and the reduction in the amount of heat of the textile product a can be similarly realized.

[0022]

As described above, according to the present invention, since cooling is performed by latent heat of vaporization by controlling the pressure of the circulating air flow in the cooling process, a cooling medium such as cooling water is unnecessary, and direct and efficient cooling that does not rely on a refrigerant can be performed. It becomes possible, and it does not require circulation power such as a cooling medium, which helps save energy. Also, even if impurities dissolved in the treatment liquid under high temperature come out as oligomers etc. as the temperature decreases, the amount of treatment liquid impregnated into the fabric is very small, so that the oligomers etc. are also very small. Oligomer does not adhere easily because it is semi-dry. Further, since the amount of the treatment liquid impregnated in the fabric can be reduced by the airflow treatment, the amount of heat accumulated in the fabric is reduced and the cooling time is shortened. Further, if the high temperature drainage is performed before the cooling step, the cooling time can be shortened, and since the drainage is discharged at a high temperature, dissolved impurities such as oligomers are discharged together with the high temperature drainage, so that the so-called internal treatment equipment is discharged. The pot stains and redeposition of treated fabrics are improved. Further, redeposition of dissolved impurities on the inside of the processing apparatus and the treated cloth is significantly improved, so that post-treatment steps such as impurity removal are reduced.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an airflow type processing apparatus according to the present invention.

[Explanation of symbols]

 1 Processing Tank 2 Processing Liquid Circulation Path 3 Air Flow Circulation Path 4 Processing Liquid Injection Section 5 Air Flow Injection Section 8 Transfer Passage 9 Retention Tank 12 High Temperature Drain Valve 13 Liquid Reservoir 14 Pump 15,18 Heat Exchanger 17 Blower 30 Pressure Sensor 31 Pressure gauge 32 Pressure control valve for cooling control 33 Control section a Rope-shaped fiber product

Claims (3)

[Claims] 1. An endless process for forming an annular fabric processing passage by connecting a transfer passage for transferring a rope-shaped fiber product in a substantially straight state and a retention tank for transferring in a meandering state to form an annular fabric processing passage. A processing liquid circulation path for supplying a processing liquid to the processing fluid jetting unit provided at the upstream end of the transfer passage from the holding tank through a pump and a heat exchanger, and a blower and heat from the holding tank. An airflow circulation path for supplying an airflow to a treatment fluid ejecting unit provided at an upstream end of the transfer passage via an exchanger is provided, and the treatment fluid is ejected from the treatment fluid ejecting unit to a treated cloth at a predetermined temperature. In the airflow type processing method for circulating the cloth, in the step of raising the temperature of the processing fluid and maintaining a constant temperature, dyeing or other processing is performed with a gas-liquid mixed fluid or a liquid single fluid, and in the cooling step, the pressure of the circulating airflow is Air flow type processing method of rope-like textile product characterized in that so as to cool the control. 2. An endless treatment is provided in the fabric treatment passage by connecting a transport passage for transporting the rope-shaped fiber product in a substantially straight state and a retention tank for transporting it in a meandering state to form an annular fabric treatment passage. A processing liquid circulation path for supplying a processing liquid to the processing fluid jetting unit provided at the upstream end of the transfer passage from the holding tank through a pump and a heat exchanger, and a blower and heat from the holding tank. By providing an airflow circulation path for supplying an airflow to the processing fluid ejecting unit provided at the upstream end of the transfer passage via an exchanger, and injecting the processing fluid at a predetermined temperature from the processing fluid ejecting unit to the treated cloth. In an airflow type processing method for circulating the treated cloth, in the step of raising the temperature of the processing fluid and maintaining a constant temperature, dyeing or other processing is performed with a gas-liquid mixed fluid or a liquid single fluid, and in the cooling step, after high temperature drainage Air flow type processing method of rope-like textile product characterized in that the gradually cooled by latent heat of vaporization, while lowering adjusting the pressure in the processing apparatus. 3. An endless treated cloth is formed in the passage by connecting a transfer passage for transferring the rope-shaped fiber product in a substantially straight state and a retention tank for transferring in a meandering state to form an annular cloth treatment passage. A processing liquid circulation path that feeds the processing liquid from the retention tank to a processing fluid injection unit provided at an upstream end of the transfer passage via a pump and a heat exchanger, and a blower and a heat exchanger from the retention tank. And an airflow circulation path for supplying an airflow to the treatment fluid ejecting unit provided at the upstream end of the transfer passage via the treatment fluid ejecting unit to eject the treatment fluid at a predetermined temperature onto the treatment cloth to form the treatment cloth. In an air flow type processing device for circulating treatment, a high temperature drain valve connected to the retention tank, a pressure sensor for detecting the pressure in the air flow type processing device, and a cooling control pressure control valve connected to the air flow type processing device, The pressure Airflow type processing apparatus of the rope-like fiber product characterized by comprising a control unit for controlling the cooling control pressure regulating valve and the high-temperature liquid discharge valve based on a signal from the sensor.