CN111441184B - Dyeing textile washing method free of auxiliary agent, capable of removing foot water and floating color - Google Patents
Dyeing textile washing method free of auxiliary agent, capable of removing foot water and floating color Download PDFInfo
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- CN111441184B CN111441184B CN202010383939.6A CN202010383939A CN111441184B CN 111441184 B CN111441184 B CN 111441184B CN 202010383939 A CN202010383939 A CN 202010383939A CN 111441184 B CN111441184 B CN 111441184B
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P5/00—Other features in dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form
- D06P5/02—After-treatment
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
- D06L1/00—Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods
- D06L1/12—Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods using aqueous solvents
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Coloring (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
Abstract
The invention discloses an assistant-free, foot water-cleaning and flooding-removing dyed textile washing method, which is characterized in that dyed textiles are placed in a washing tank and are subjected to plasma cleaning by a plasma generating device, no assistant is added, the dyed textiles are cleaned by plasma activated water, the flooding effect of the dyed textiles can be removed, the color fastness of the textiles is improved, washing residual liquid is colorless, the COD value is greatly reduced, and the problems of colored wastewater discharge and COD (chemical oxygen demand) failure in dyeing and soaping in the conventional textile dyeing processing are solved.
Description
Technical Field
The invention relates to the technical field of textiles, in particular to a dyeing textile washing method capable of removing floating color without using auxiliaries and with clear foot water.
Background
At present, the traditional dyeing technology is completed under the combined action of various auxiliary agents, such as a dispersing agent, a leveling agent, an accelerating agent and the like. The using amount of the auxiliary agents is huge during dyeing, and all the auxiliary agents enter a water body after dyeing, so that the auxiliary agents are the first large pollution source of dyeing industry and cause serious COD (chemical oxygen demand) and BOD (biochemical oxygen demand) loads of the water body; meanwhile, the solubilizing effect of the auxiliary agent increases the retention of the dye in the dyeing wastewater, and further aggravates the water pollution, especially the chroma pollution; secondly, in order to ensure that the color fastness of the dyed product meets the requirements, a sufficient washing process is indispensable, a large amount of washing aids such as detergents are needed, the water consumption and the complexity of the washing process are far too large for the dyeing process, the washing aids are a large pollution source in the dyeing industry, and the large amount of seriously polluted waste water is directly discharged into a ground water system or is subjected to special end treatment. The additional cost required by the end treatment is huge, the dyeing enterprises are difficult to bear, and actually the current end treatment is up to the real standard, and the emission standard can be met only by diluting with clear water. Actually, the method is a big problem which cannot be overcome at present because surface water quality is seriously deteriorated due to the recessive pollution to a surface water system.
After the dyeing is finished, considerable amounts of dyes and auxiliaries inevitably remain in the aqueous phase of the dye bath and even on the surface of the fibers. The dye and the auxiliary agent left in the dye bath cause serious water body pollution (thousands of COD and deep and concentrated chroma) and become a big problem of environmental management; the dye in the accumulated layer left on the surface of the fiber becomes loose color, which seriously affects the dyeing quality and must be thoroughly cleaned (reduction cleaning, soaping, washing with clear water). The dyeing post-treatment not only consumes a larger amount of water (about 80-120 t of water is consumed for washing 1t of fabric) and energy (heat energy and energy for operating a machine), but also consumes considerable detergent and other chemicals, which causes larger water body pollution. In essence, the dyeing effect is based on the simple process of dissolution of the dye in the aqueous phase, diffusion on the fiber surface and further diffusion into the fiber interior and dyeing, and the enormous cost is the pollution to the water body and the energy consumption.
With the increasingly strengthened requirement of environmental protection, energy conservation and emission reduction become the development direction of the traditional dyeing and finishing processing. The textile processed by dyeing cannot reach 100% exhaustion of dye, especially, partial dye can be hydrolyzed, and the undyed and hydrolyzed dye is attached to the surface and gaps of the textile to form loose color, thereby influencing the color light and fastness of the dyed textile. The flooding dye must be thoroughly removed by soaping and other methods to ensure good color fastness. The conventional soaping procedure is complicated, the water quality of the link is influenced by the discharge of some soaping agents, and particularly, a large amount of high-chroma waste water is generated to cause environmental pollution.
Disclosure of Invention
The invention aims to provide an assistant-free, clear-foot water and floating color-removing dyed textile washing method, which does not need to add any assistant, achieves the effect of removing the floating color of the dyed textile by activating water through plasma, has no color in washing residual liquid, greatly reduces the COD value, has simple process, good product quality, no secondary pollutant discharge and can be used repeatedly.
In order to achieve the purpose, the invention provides the following technical scheme: an assistant-free, clear-foot and loose-color-removing dyeing textile washing method comprises the following steps:
(1) placing the dyed textile in a rinsing bath, wherein the rinsing bath is arranged between a positive electrode and a negative electrode of a plasma generating device;
(2) and turning on a power supply, starting a plasma generating device, generating dielectric barrier discharge between the positive electrode and the negative electrode, ionizing air on the water surface to generate air plasma, contacting with water in a water washing tank, activating a water body in the water washing tank, removing the floating color on the surface of the dyed textile to obtain the dyed textile without the floating color, and destroying the washed dye conjugated structure to decolor.
Preferably, the power of the plasma generated by the plasma generating device is 70-100W.
Preferably, the time of the water washing treatment of the dyed textiles is 2-4 min.
Preferably, the output frequency of the power supply of the plasma generating device is 5-20kHz, the voltage of the power supply is 10-20 kv, the output value of the current sampling resistor is 50 Ω, and the output value of the capacitor is 0.47 μ F.
Preferably, the positive and negative electrodes of the plasma generator are aluminum electrodes.
Preferably, the positive electrode and the negative electrode are respectively arranged above the water tank and at the bottom of the water tank.
Preferably, the dyed textile comprises a dyed textile of a reactive dye, an acid dye, a vat dye, a disperse dye or a cationic dye.
Preferably, the fibers of the dyed textile comprise cellulose fibers, protein fibers, polyester fibers, nylon fibers or acrylic fibers.
Preferably, the dyed textile comprises dyed fibers, dyed yarns, dyed woven fabrics, dyed knitted fabrics or dyed garments.
Compared with the prior art, the invention has the beneficial effects that:
the invention replaces the traditional conventional soaping process with the plasma technology, the dyed textiles can be cleaned by activating water through plasma without adding any auxiliary agent in a rinsing bath, the effect of removing the loose color of the dyed textiles can be achieved, the color fastness of the textiles is improved, the washing residual liquid has no color, the COD value is reduced to be below 100, the problems of colored wastewater discharge and unqualified COD in the dyeing and soaping process of the current textiles are solved, and the water can be recycled.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a technical scheme that: an assistant-free, clear-foot and loose-color-removing dyeing textile washing method comprises the following steps:
(1) placing the dyed textile in a rinsing bath, wherein the rinsing bath is arranged between a positive electrode and a negative electrode of a plasma generating device;
(2) turning on a power supply, starting the plasma generating device, wherein the power of the plasma generated by the plasma generating device is 70-100W, and the positive electrode and the negative electrode of the plasma generating device ionize air (oxygen) ionized on the water surface to generate air (oxygen) plasma; the method comprises the steps of firstly activating water molecules on the water surface in contact with air by air (oxygen) plasma, fully activating water in a dyed textile washing tank, removing the floating color of the dyed textile in the water, and destroying the conjugated structure of the washed dye to decolor the obtained floating dyed textile, wherein the treatment time of the dyed textile is 2-4 min. Preferably, the power of the plasma generated by the plasma generating device is 100W, and the time for treating the dyed textiles is 4 min.
And 2, the positive electrode and the negative electrode of the plasma generating device are aluminum electrodes, the positive electrode and the negative electrode are respectively arranged above the water tank and at the bottom of the water tank, the output frequency of the power supply is 5-20kHz, the voltage of the power supply is 10-20 kilovolts, the output value of the current sampling resistor is 50 omega, and the output value of the capacitor is 0.47 muF.
The dyed textile includes dyed textiles of reactive, acid, vat, disperse or cationic dyes.
The fiber of the dyed textile comprises cellulose fiber, protein fiber, polyester fiber, nylon fiber or acrylic fiber.
The dyed textile includes dyed fibers, dyed yarns, dyed woven fabrics, dyed knitted fabrics, or dyed garments.
The following are specific examples:
(1) effect of time on cleaning Effect
The effect of plasma treatment time on the cleaning effect of reactive red M3BE, reactive yellow M-3RE and reactive blue M-2GE dyed textiles (dyeing concentration of 1% o.w.f.) was investigated at a power of 85W, and the results are shown in tables 1 and 2:
TABLE 1 influence of plasma treatment time on the absorbance of the raffinate
TABLE 2 Effect of time on K/S values of dyed textiles
As can be seen from tables 1 and 2, the absorbance value of the raffinate gradually decreased with the increase of the plasma treatment time, i.e., the longer the treatment time, the more the leuco dye was degraded; when the treatment time is 4min, the residual liquid is nearly colorless, and the K/S value of the dyed textile is reduced along with the prolonging of the treatment time, which indicates that the more the flooding dye on the textile is washed; considering that the color of the dyed fabric becomes light due to too long time, the plasma treatment time is determined to be 4min in order to meet the color depth of the dyed product of the customer.
(2) Effect of Power on cleaning Effect
The effect of the power on the cleaning effect of dyed textiles (dyeing concentration of 1% o.w.f.) was examined under plasma treatment for a period of 3min, and the results are shown in tables 3 and 4:
TABLE 3 influence of plasma treatment power on the absorbance of raffinate
TABLE 4 Effect of Power on K/S values of dyed textiles
As can be seen from tables 3 and 4, the higher the plasma treatment power, the smaller the absorbance of the raffinate, and the more nearly colorless the raffinate, i.e., the more the leuco dye in the raffinate is oxidized and degraded into colorless material; the K/S value of the dyed textile is gradually reduced along with the increase of the power, which indicates that the more the floating dye on the surface of the textile is washed away; the treatment power exceeds 100W, there is a risk of breaking down the fabric, and therefore the plasma treatment power is determined to be 100W.
(3) Plasma cleaning compares with conventional soaping process
Reactive red M-3BE, reactive yellow M-3RE and reactive blue M-2GE dyed textiles (dyeing concentration of 1% o.w.f.) were subjected to a cleaning treatment with plasma under optimized cleaning process conditions and compared with a conventional soaping process, the results are shown in table 5:
TABLE 5 comparison of cleaning effectiveness of plasma cleaning Process and conventional soaping Process
As can be seen from Table 5, after the three reactive dyes dyed textiles are subjected to plasma cleaning, the dry and wet rubbing fastness, color change and staining fastness of the textiles are equivalent to the effects of conventional soaping process treatment; compared with the conventional soaping, the K/S value of the fabric after the plasma-assisted washing is not changed greatly, the absorbance of the residual liquid is reduced greatly, the residual liquid is nearly colorless, and the COD value of the wastewater is obviously reduced and is below 100 and is as low as 54. Therefore, when the fabric is cleaned, the plasma not only washes away the floating color on the surface of the fabric to ensure the color fastness of the fabric, but also can destroy the color system of the floating color dye, degrade the floating color dye into a colorless substance, and is more environment-friendly compared with the conventional soaping process.
In conclusion, the plasma technology is used for replacing the conventional soaping process, the dyed textiles are cleaned by the plasma technology without adding any auxiliary agent, so that the flooding can be removed, the color fastness is improved, the foot water is clear, the washing residual liquid is colorless, and the problems of discharge of colored wastewater and unqualified COD (chemical oxygen demand) generated by soaping the dyed textiles in the conventional textile dyeing and finishing processing can be solved.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. An assistant-free, clear-foot and loose-color-removing dyeing textile washing method is characterized in that: comprises the following steps:
(1) placing the dyed textile in a rinsing bath, wherein the rinsing bath is arranged between a positive electrode and a negative electrode of a plasma generating device;
(2) turning on a power supply, starting a plasma generating device, generating dielectric barrier discharge between a positive electrode and a negative electrode, ionizing air on the water surface to generate air plasma, contacting with water in a water washing tank, activating a water body in the water washing tank, removing floating color on the surface of the dyed textile to obtain the dyed textile without floating color, and destroying the conjugated structure of the washed dye to decolor;
the power of the plasma generated by the plasma generating device is 70-100W;
the time of the water washing treatment of the dyed textiles is 2-4 min;
the output frequency of a power supply in the plasma generating device is 5-20kHz, the voltage of the power supply in the plasma generating device is 10-20 kilovolts, the output value of a current sampling resistor of the power supply in the plasma generating device is 50 omega, and the output value of a capacitor of the power supply in the plasma generating device is 0.47 muF.
2. The dyeing textile washing method free of auxiliary agents, capable of removing foot water and floating color according to claim 1, characterized in that: the positive electrode and the negative electrode of the plasma generating device are aluminum electrodes.
3. The dyeing textile washing method free of auxiliary agents, capable of removing foot water and floating color according to claim 1, characterized in that: the positive electrode and the negative electrode are respectively arranged above the water tank and at the bottom of the water tank.
4. The dyeing textile washing method free of auxiliary agents, capable of removing foot water and floating color according to claim 1, characterized in that: the dyed textile includes dyed textiles of reactive, acid, vat, disperse or cationic dyes.
5. The dyeing textile washing method free of auxiliary agents, capable of removing foot water and floating color according to claim 1, characterized in that: the fiber of the dyed textile comprises cellulose fiber, protein fiber, polyester fiber, nylon fiber or acrylic fiber.
6. The dyeing textile washing method free of auxiliary agents, capable of removing foot water and floating color according to claim 1, characterized in that: the dyed textile includes dyed fibers, dyed yarns, dyed woven fabrics, dyed knitted fabrics, or dyed garments.
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| CN202010383939.6A CN111441184B (en) | 2020-05-08 | 2020-05-08 | Dyeing textile washing method free of auxiliary agent, capable of removing foot water and floating color |
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| CN202010383939.6A CN111441184B (en) | 2020-05-08 | 2020-05-08 | Dyeing textile washing method free of auxiliary agent, capable of removing foot water and floating color |
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