CN114507964B - Environment-friendly fading treatment process for jean fabric and after-finishing line - Google Patents
Environment-friendly fading treatment process for jean fabric and after-finishing line Download PDFInfo
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- CN114507964B CN114507964B CN202111652926.5A CN202111652926A CN114507964B CN 114507964 B CN114507964 B CN 114507964B CN 202111652926 A CN202111652926 A CN 202111652926A CN 114507964 B CN114507964 B CN 114507964B
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- 239000004744 fabric Substances 0.000 title claims abstract description 81
- 238000000034 method Methods 0.000 title claims abstract description 74
- 230000008569 process Effects 0.000 title claims abstract description 51
- 238000005562 fading Methods 0.000 title claims abstract description 45
- 230000003647 oxidation Effects 0.000 claims abstract description 106
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 106
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 92
- 239000002351 wastewater Substances 0.000 claims abstract description 32
- 238000004383 yellowing Methods 0.000 claims abstract description 32
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000007788 liquid Substances 0.000 claims abstract description 19
- 238000009990 desizing Methods 0.000 claims abstract description 17
- 238000009999 singeing Methods 0.000 claims abstract description 16
- 238000011084 recovery Methods 0.000 claims description 27
- COHYTHOBJLSHDF-UHFFFAOYSA-N indigo powder Natural products N1C2=CC=CC=C2C(=O)C1=C1C(=O)C2=CC=CC=C2N1 COHYTHOBJLSHDF-UHFFFAOYSA-N 0.000 claims description 17
- COHYTHOBJLSHDF-BUHFOSPRSA-N indigo dye Chemical compound N\1C2=CC=CC=C2C(=O)C/1=C1/C(=O)C2=CC=CC=C2N1 COHYTHOBJLSHDF-BUHFOSPRSA-N 0.000 claims description 15
- 206010020112 Hirsutism Diseases 0.000 claims description 13
- 238000005273 aeration Methods 0.000 claims description 13
- 108090000790 Enzymes Proteins 0.000 claims description 10
- 102000004190 Enzymes Human genes 0.000 claims description 10
- 229940088598 enzyme Drugs 0.000 claims description 10
- 238000004061 bleaching Methods 0.000 claims description 8
- 238000011946 reduction process Methods 0.000 claims description 8
- 108010059892 Cellulase Proteins 0.000 claims description 7
- 229940106157 cellulase Drugs 0.000 claims description 7
- 239000003638 chemical reducing agent Substances 0.000 claims description 7
- 238000004064 recycling Methods 0.000 claims description 6
- 239000012141 concentrate Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000004043 dyeing Methods 0.000 abstract description 4
- 238000004065 wastewater treatment Methods 0.000 abstract description 4
- 239000000243 solution Substances 0.000 description 32
- 239000007789 gas Substances 0.000 description 23
- 239000000975 dye Substances 0.000 description 13
- 238000005406 washing Methods 0.000 description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 9
- 239000001301 oxygen Substances 0.000 description 9
- 229910052760 oxygen Inorganic materials 0.000 description 9
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 6
- 239000002699 waste material Substances 0.000 description 5
- 239000005708 Sodium hypochlorite Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 239000012286 potassium permanganate Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 235000000177 Indigofera tinctoria Nutrition 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 229940097275 indigo Drugs 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000004753 textile Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 238000006424 Flood reaction Methods 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 238000010014 continuous dyeing Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000007730 finishing process Methods 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 229910001437 manganese ion Inorganic materials 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000000984 vat dye Substances 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
- D06C9/00—Singeing
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
- D06B23/00—Component parts, details, or accessories of apparatus or machines, specially adapted for the treating of textile materials, not restricted to a particular kind of apparatus, provided for in groups D06B1/00 - D06B21/00
- D06B23/20—Arrangements of apparatus for treating processing-liquids, -gases or -vapours, e.g. purification, filtration or distillation
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
- D06B23/00—Component parts, details, or accessories of apparatus or machines, specially adapted for the treating of textile materials, not restricted to a particular kind of apparatus, provided for in groups D06B1/00 - D06B21/00
- D06B23/20—Arrangements of apparatus for treating processing-liquids, -gases or -vapours, e.g. purification, filtration or distillation
- D06B23/22—Arrangements of apparatus for treating processing-liquids, -gases or -vapours, e.g. purification, filtration or distillation for heating
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
- D06B3/00—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating
- D06B3/10—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating of fabrics
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/32—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond
- D06M11/34—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond with oxygen, ozone or ozonides
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M16/00—Biochemical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. enzymatic
- D06M16/003—Biochemical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. enzymatic with enzymes or microorganisms
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2200/00—Functionality of the treatment composition and/or properties imparted to the textile material
- D06M2200/25—Resistance to light or sun, i.e. protection of the textile itself as well as UV shielding materials or treatment compositions therefor; Anti-yellowing treatments
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Biochemistry (AREA)
- Microbiology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Coloring (AREA)
- Treatment Of Fiber Materials (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention discloses an environment-friendly fading treatment process and a post-finishing line for jean fabric, which belong to the dyeing and finishing field, wherein the process comprises a singeing process, a desizing process and a fading process, the operation of the fading process comprises the steps of continuously enabling the jean fabric to pass through a plurality of oxidation tank tanks, filling water and ozone and dye-proofing agents dissolved in the water in the oxidation tank tanks, the ozone concentration of a solution in the latter oxidation tank is 10-20% lower than that of the former oxidation tank according to the passing sequence of the jean fabric, the dye-proofing agent concentration in all the oxidation tank tanks is 0.5g/L-2g/L, the ozone concentration is easier to control by ozone solution treatment on one hand, the ozone concentration in the oxidation tank solution is set to be reduced according to the passing sequence of the jean fabric, so that the ozone concentration is prevented from being too high, the treatment time is too long, on the other hand, the dye-proofing agents can be added in a liquid environment, so that the jean fabric is prevented from being stained and yellowing, the process waste water is simple in composition, and the waste water treatment cost is low.
Description
Technical Field
The invention relates to an environment-friendly fading treatment process and a post-finishing line for jean fabric, and belongs to the field of dyeing and finishing.
Background
The washing process is a part of jeans wear finishing process, is a key process for determining the added value of jeans wear, and aims to perform distressing treatment on jeans wear. The indigo dye commonly used for dyeing denim yarns is a vat dye. The traditional washing procedures comprise enzyme bleaching, oxygen bleaching, chlorine bleaching, manganese bleaching and the like, so that indigo dye on the fabric is oxidized and faded, the treatment procedures are various, the treatment process is discontinuous due to washing in a washing machine, and the treatment time is long. On the other hand, a large amount of hydrogen peroxide, sodium hypochlorite, sodium hydroxide and potassium permanganate are needed in the washing procedures, so that the wastewater contains a large amount of chloride ions and manganese ions, and the wastewater treatment cost is high.
With the progress of society and the development of economy, the country puts higher requirements on environmental protection, the traditional washing process is not a road for the green sustainable development of textile industry, and new jeans clothing washing processes, such as laser and ozone, have appeared in the industry with little water consumption. The principle of using ozone gas for distressing is that strong oxidizing property of ozone is directly applied to unsaturated bonds of indigo dye or cellulose fiber to cause discoloration. However, the ozone process has a serious problem in that if the ozone concentration is high or the treatment time is long, the surface of the fabric becomes irreversibly yellow, and the concentration of ozone gas and the treatment time are extremely difficult to control.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides the environment-friendly fading treatment process and the after-finishing line for the jean fabric, so that the difficulty in wastewater treatment is reduced, and the jean fabric is prevented from yellowing.
The technical scheme adopted for solving the technical problems is as follows:
An environment-friendly fading treatment process for jean fabric sequentially comprises the following steps: the method comprises the steps of singeing, desizing and fading, wherein the fading comprises the steps of continuously enabling jean fabric to pass through a plurality of oxidation tank grooves, wherein water, ozone dissolved in the water and a dye-preventing agent are filled in the oxidation tank grooves, the ozone concentration of a solution in the latter oxidation tank groove is 10% -20% lower than that in the former oxidation tank groove according to the passing sequence of the jean fabric, and the dye-preventing agent concentration in all the oxidation tank grooves is 0.5g/L-2g/L.
The environment-friendly denim fabric fading treatment process provided by the invention has simple wastewater components, ozone is dissolved into water for reuse, the concentration of the ozone is easy to control, and the environment-friendly denim fabric fading treatment process can be matched with a dyeing inhibitor to carry out fading treatment, so that the denim fabric is prevented from yellowing.
Further, in the singeing process, both the front and back sides of the jean fabric are singed.
Further, the treatment temperature of the desizing procedure is 50 ℃, and the concentration of the desizing enzyme is 12g/L-15g/L.
Further, the color fading process further comprises a hairiness removing process, and the hairiness on the surface of the jean fabric is removed by using cellulase.
Further, the method further comprises a reduction process and an anti-yellowing process after the fading process, wherein the reduction process uses a reducing agent to remove residual ozone on the surface of the jean fabric, and the anti-yellowing process uses an anti-yellowing agent to perform anti-yellowing treatment on the jean fabric by using a padding method. The reduction process can avoid the ozone still continuously acting on the jean fabric after finishing and avoid the jean fabric from becoming yellow gradually.
Further, the jean fabric environment-friendly fading treatment process also comprises a dye recovery procedure; ozone gas is introduced into the bottom of each oxidation tank groove in the fading process, and each oxidation tank groove discharges fading wastewater; the dye recovery procedure collects the discolored wastewater into a recovery tank, collects the gas at the top of each oxidation tank, conveys the gas into the recovery tank for aeration, and heats, concentrates and filters the wastewater in the recovery tank to recover solid indigo dye. The waste water is usually directly abandoned and subjected to fading treatment in industry, the chemical oxygen demand of the waste water is high, the treatment cost is high, the chemical oxygen demand of the fading waste water is high because the fading treatment causes a large amount of vat indigo dye to be dissolved in the waste water, and the waste water is oxidized by utilizing oxygen generated after ozone reaction and redundant ozone, so that the indigo dye is oxidized into an insoluble state, the dye is recovered, and the resource is saved.
Further, the implementation step of the solution ozone concentration in the next oxidation tank is 10% -20% lower than that in the previous oxidation tank comprises the steps of pumping excessive ozone gas into each oxidation tank, and adjusting the water temperature of each oxidation tank so that the ozone solubility in the next oxidation tank is 10% -20% lower than that in the previous oxidation tank. The adoption of the ozone concentration meter to control the solubility in the solution is troublesome, and the ozone concentration in a plurality of oxidation tank tanks can be simply reduced by regulating the solubility of ozone through temperature.
The invention also provides a finishing line which sequentially comprises a singeing machine, a desizing tank containing desizing enzyme, a plurality of oxidation tank tanks, an enzyme washing tank containing cellulase, a clear water tank, a reducing tank containing reducing agent and an anti-yellowing tank containing anti-yellowing agent according to the passing sequence of jean fabric, wherein water, ozone dissolved in water and a dye resist agent are filled in the oxidation tank tanks, the ozone concentration of a solution in the latter oxidation tank is 10-20% lower than the ozone concentration in the former oxidation tank, and the dye resist agent concentration in all the oxidation tank tanks is 0.5-2 g/L.
The denim fabric treated by the after-finishing line can prevent the denim fabric from yellowing after the fading treatment, and the waste water generated by the after-finishing line has simple components and is easy to treat.
Further, the bottom of oxidation case groove is provided with air feeder, the entry and the export in oxidation case groove all are provided with U type liquid seal structure, the liquid level in the oxidation case inslot is higher than the minimum of U type liquid seal structure, be provided with the cloth guide roller that restriction jean surface fabric is less than the liquid level in the oxidation case groove. The oxidation box body with the structure can avoid gas dissipation, avoid gas waste and adjust ozone concentration more easily.
Further, the after-treatment line also comprises a recovery tank, an aeration device is arranged at the bottom of the recovery tank, a waste water pipe communicated to the recovery tank is arranged on the side face of the oxidation tank, an exhaust pipe communicated to the aeration device is arranged at the top of the oxidation tank, and a heating device is arranged in the recovery tank.
The beneficial effects of the invention are as follows: according to the invention, the technology of the bleaching treatment of the jean fabric by ozone gas in the prior art is changed into the technology of the bleaching treatment of the jean fabric by ozone solution, so that the ozone concentration is easier to control, the ozone concentration in the solution of the oxidation tank is set to be gradually decreased according to the passing sequence of the jean fabric, so that the over-high ozone concentration and the overlong treatment time are avoided, and on the other hand, an anti-dyeing agent can be added in a liquid environment to avoid the staining and yellowing of the jean fabric.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application. The objectives and other advantages of the application will be realized and attained by the structure particularly pointed out in the written description and claims thereof as well as the appended drawings.
Drawings
Fig. 1 is a schematic structural diagram of an after-finishing line according to an embodiment of the present application.
Fig. 2 is a schematic structural diagram of an oxidation tank according to an embodiment of the present application.
Reference numerals: 1. a singeing machine; 2. desizing tank; 3. an oxidation tank; 31. an exhaust pipe; 32. a waste pipe; 33. a U-shaped liquid seal structure; 34. a cloth guide roller; 35. a gas supply device; 4. an enzyme washing tank; 5. a clear water tank; 6. a reduction pool; 7. an anti-yellowing pool; 8. a recovery pool; 81. an aeration device.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention and are not to be construed as limiting the present invention.
The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed.
An environment-friendly fading treatment process for jean fabric sequentially comprises the following steps: the method comprises the steps of singeing, desizing and fading, wherein the operation of the fading comprises the steps of continuously enabling jean fabric to pass through a plurality of oxidation tank grooves 3, water, ozone dissolved in the water and a dye-proofing agent are filled in the oxidation tank grooves 3, the ozone concentration of a solution in the next oxidation tank groove 3 is 10% -20% lower than that in the previous oxidation tank groove 3 according to the passing sequence of the jean fabric, and the dye-proofing agent concentration in all the oxidation tank grooves 3 is 0.5g/L-2g/L. For example, five oxidation tanks are used in total, the concentration of ozone in the first oxidation tank solution is set to be 0.81g/L, the concentration of ozone in the second oxidation tank solution is set to be 0.72g/L, the concentration of ozone in the third oxidation tank solution is set to be 0.63g/L, the concentration of ozone in the fourth oxidation tank solution is set to be 0.54g/L, and the concentration of ozone in the fifth oxidation tank solution is set to be 0.45g/L.
In the prior art, ozone gas is used for carrying out fading treatment on jean fabric, the air injection angle and the air injection dispersion degree are important, yellowing is easy to occur at the concentrated position of the ozone gas, and the cloth moving into a fold line is difficult to cause gas disturbance. The invention is changed to treat with ozone solution, the concentration of ozone in the solution environment is easier to control, and cloth moving along the folding line is easy to increase the flow of the solution, so that the ozone is uniformly distributed in the solution. The ozone concentration in the solution in the oxidation tank 3 is set to be decreased according to the passing sequence of the jean fabric, so that the over-high ozone concentration and the over-long treatment time are avoided. On the other hand, an anti-dyeing agent can be added in a liquid state environment, so that indigo dye which just falls off from the jean fabric is prevented from being dyed on the white surface of the jean fabric again, and the yellow stain of the white surface of the jean fabric is prevented. The process has the advantages that the wastewater volume is more than the ozone gas fading treatment in the prior art, the wastewater volume is less than the conventional hydrogen peroxide, sodium hypochlorite, sodium hydroxide and potassium permanganate treatment, the wastewater components are relatively simple, the wastewater treatment cost is low, and the wastewater volume is further reduced by an improved method.
For example, a dye recovery process is added. Ozone gas is introduced into the bottom of each oxidation tank groove 3 in the fading process, and each oxidation tank groove 3 discharges fading wastewater; the process of dye recovery collects the decoloured waste water into a recovery tank 8, collects the gas at the top of each oxidation tank 3, conveys the gas into the recovery tank 8 for aeration, heats, concentrates and filters the waste water in the recovery tank 8, and recovers the solid indigo dye.
The chemical oxygen demand of the fading waste water is high, the treatment cost is high, because the fading waste water contains indigo dye which is relatively high in concentration and falls off from the fiber and unoxidized indigo leuco bodies, the waste water subjected to the traditional fading treatment of hydrogen peroxide, sodium hypochlorite, sodium hydroxide and potassium permanganate is complex in components, the indigo dye is difficult to recover and purify, the resource waste is caused, and the waste water is difficult to treat. The oxidant used in the invention is ozone, and finally only oxygen and ozone which does not participate in the reaction can be generated, the ozone is easy to separate from the solution and still has oxidizing property, the gases are collected and pumped back into the wastewater, and meanwhile, the recovery tank 8 is heated, so that the indigo dye can be separated out, the indigo dye can be recovered after filtration, and the cost is saved. Preferably, the wastewater is filtered once before being collected in the recovery tank 8 to remove hairiness in the wastewater.
Singeing is carried out on the front side and the back side of the jean fabric in the singeing process, and one of the purposes is to reduce hairiness entering into the solution, so that indigo dye can be recovered. On the other hand, the hairiness in the solution is reduced, so that the ozone in the hairiness consuming solution can be reduced, and the treatment effect on the fabric main body is ensured.
The treatment temperature of the desizing procedure is 50 ℃, and the concentration of the desizing enzyme is 12g/L-15g/L. The method is carried out by adopting a conventional desizing method, and aims to remove the sizing agent on the surface of the jean fabric and expose the fiber to react with ozone solution.
The color fading process also comprises a hairiness removing process, wherein the hairiness on the surface of the jean fabric is removed by using cellulase. The cellulase acts on the surface of the fabric to remove hairiness on the surface of the fabric, so that the color fastness of the fabric can be effectively improved, otherwise, the dye on the hairiness can fall off along with the falling of the hairiness, and the color fastness is reduced.
The method also comprises a reduction process and an anti-yellowing process after the fading process, wherein the reduction process uses a reducing agent to remove residual ozone on the surface of the jean fabric, and the anti-yellowing process uses an anti-yellowing agent to perform anti-yellowing treatment on the jean fabric by using a padding method. The anti-yellowing process is carried out by a conventional anti-yellowing method, and the reduction process can avoid the ozone still continuously acting on the jean fabric after finishing is finished, so that the jean fabric is prevented from becoming yellow gradually in the future.
The implementation step of the solution ozone concentration in the next oxidation tank 3 being 10% -20% lower than the ozone concentration in the previous oxidation tank 3 comprises pumping excessive ozone gas into each oxidation tank 3, and adjusting the water temperature of each oxidation tank 3 so that the ozone solubility in the next oxidation tank 3 is 10% -20% lower than the ozone solubility in the previous oxidation tank 3. Of course, an ozone concentration meter or an ozone sensor can be arranged in the oxidation tank 3 to monitor the concentration of ozone in the solution, but the control logic is complex, the valve for supplying ozone and the ozone monitoring equipment are connected to the controller, the transformation cost is high, and a control model is required to be designed. In the preferred embodiment, the characteristic of low water solubility of ozone is utilized, the ozone gas is directly supplied to the excess, the solution gradient of the ozone solution is controlled by adjusting the temperature of each oxidation tank 3, a control model is not required to be established, a controller is not required to be added, the control difficulty is extremely low, and the excess ozone is directly collected to be used for recycling indigo dye and one stone bird.
In combination with the above process, referring to fig. 1, a finishing line sequentially comprises a singeing machine 1, a desizing tank 2 containing desizing enzyme, a plurality of oxidation tank 3, an enzyme washing tank 4 containing cellulase, a clean water tank 5, a reducing tank 6 containing reducing agent and an anti-yellowing tank 7 containing anti-yellowing agent according to the passing sequence of jean fabric. The speed of the singeing machine 1 is 70 m/min-80 m/min.
Referring to fig. 2, a cloth guide roller 34 is disposed in the oxidation tank, a gas supply device 35 is disposed at the bottom of the oxidation tank, the gas supply device 35 is communicated with an ozone generator (not shown in the figure) through a valve, a U-shaped liquid seal structure 33 is disposed at the inlet and the outlet of the oxidation tank 3, the liquid level in the oxidation tank 3 is higher than the lowest point of the U-shaped liquid seal structure 33, an exhaust pipe 31 is disposed at the top of the oxidation tank 3, and a waste water pipe 32 (not shown in fig. 2) is disposed at the side surface of the oxidation tank 3. Oxygen is generated after the ozone reaction, and the oxidation tank 3 is subjected to liquid seal transformation to avoid the dissipation of the generated oxygen into a workshop and avoid the easy ignition of the high oxygen concentration in the workshop.
The oxidation tank is filled with a solution which floods the cloth guide roller 34, ozone and a dye-preventing agent are dissolved in the solution, the ozone concentration of the solution in the next oxidation tank 3 is 10-20% lower than that in the previous oxidation tank 3 according to the passing sequence of jean fabric, and the dye-preventing agent concentration in all the oxidation tank 3 is 0.5-2 g/L. The number of the oxidation tank grooves 3 and the ozone water concentration of each oxidation tank groove 3 are determined by the distressing degree, and if the distressing is slightly performed, 5 oxidation tank grooves can be used for setting lower ozone concentration; if severe distressing is required, 8 oxidation tanks can be used to set a higher ozone concentration.
The bottom of recovery pond 8 is provided with aeration equipment 81, and waste pipe 32 communicates to recovery pond 8, and blast pipe 31 communicates to aeration equipment 81, can add the fan and pump the gas that will collect to aeration equipment 81, is provided with heating device (not shown in the figure) in the recovery pond 8, after continuous evaporation concentration, can regularly artifical salvage out the indigo crystallization, but reuse after the stoving.
Description of the preferred embodiments
Reform transform original tradition processing line that fades, add recovery tank 8, the bottom of recovery tank 8 is provided with aeration equipment 81. The original traditional fading treatment line comprises nine tank grooves, a singeing machine 1 is additionally arranged in front of the nine tank grooves, a reduction pool 6 is additionally arranged behind the nine tank grooves, so that jean fabrics sequentially pass through the singeing machine, the nine tank grooves, the reduction pool 6 and the original anti-yellowing pool 7, and the speed of the singeing machine 1 is set to be 70 m/min.
Among nine tanks of the continuous dyeing machine, the original cloth guide roller 34 of the tank, the second tank to the seventh tank are modified in sealing property according to the following structure to form an oxidation tank 3: the bottom of oxidation case groove 3 is provided with air feeder 35, and air feeder 35 passes through valve and ozone generator intercommunication, and the entry and the export of oxidation case groove 3 all are provided with U type liquid seal structure 33, and the liquid level in the oxidation case groove 3 is higher than the minimum of U type liquid seal structure 33, and the top of oxidation case groove 3 sets up blast pipe 31, and blast pipe 31 communicates to aeration equipment 81, and the side of oxidation case groove 3 sets up waste pipe 32.
The first tank is filled with desizing enzyme. The second tank to the seventh tank are filled with a solution for submerging the cloth guide roller 34, ozone and a dye-preventing agent are dissolved in the solution, the ozone concentration of the solution in the next oxidation tank 3 is 10-20% lower than that in the previous oxidation tank 3 according to the passing sequence of jean fabrics, and the dye-preventing agent concentration in all the oxidation tanks 3 is 0.5-2 g/L. For example, the temperature of the second tank is controlled to 25.0 ℃, the temperature of the third tank is controlled to 27.7 ℃, the temperature of the fourth tank is controlled to 31.5 ℃, the temperature of the fifth tank is controlled to 36.2 ℃, the temperature of the sixth tank is controlled to 40.1 ℃, and the temperature of the seventh tank is controlled to 46.0 ℃. The set temperature is based on a relation table of ozone solubility and temperature, so that the ozone solubility in the next oxidation tank 3 is 10% -20% lower than that in the previous oxidation tank 3, the concentrations of the anti-dyeing agents in the second to seventh tanks are 2g/L, and the anti-dyeing agents are anti-dyeing agents HWS produced by Fujian Guangdong province. The eighth tank is filled with cellulase, the ninth tank is filled with clear water, the reducing agent is dissolved in the reducing tank, ASUKD 1819 is selected as the reducing agent, and the anti-yellowing agent is dissolved in the anti-yellowing tank.
The treated jean fabric has obvious distressing effect after being dried, and the yellowing grade is measured to be 4.5 according to the yellowing result of the fabric tested in national standard GB/T29778-2013 evaluation of potential phenol yellowing of textile color fastness test, so that the process can be used for carrying out fading treatment on the jean fabric and can avoid the yellowing of the fabric.
In the description of the present specification, the descriptions of the terms "one embodiment," "certain embodiments," "an exemplary embodiment," "an example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the invention, such changes and modifications are also intended to be within the scope of the invention.
Claims (5)
1. The environment-friendly fading treatment process for the jean fabric is characterized by comprising the following steps of: the method comprises the following steps of singeing, desizing and fading, wherein the fading comprises the steps of continuously enabling jean fabric to pass through a plurality of oxidation tank grooves, wherein water, ozone dissolved in the water and a dye resist agent are filled in the oxidation tank grooves, and the ozone concentration of a solution in the latter oxidation tank groove is 10-20% lower than that in the former oxidation tank groove according to the passing sequence of the jean fabric, and the dye resist agent concentration in all the oxidation tank grooves is 0.5-2 g/L;
The method also comprises a dye recovery procedure; ozone gas is introduced into the bottom of each oxidation tank groove in the fading process, and each oxidation tank groove discharges fading wastewater; the dye recovery procedure collects the discolored wastewater into a recovery tank, collects gas at the top of each oxidation tank and conveys the gas into the recovery tank for aeration, heats, concentrates and filters the wastewater in the recovery tank, and recovers solid indigo dye;
the implementation step of the solution ozone concentration in the next oxidation tank is 10% -20% lower than that in the previous oxidation tank, and the implementation step comprises the steps of pumping excessive ozone gas into each oxidation tank, and adjusting the water temperature of each oxidation tank to enable the ozone solubility in the next oxidation tank to be 10% -20% lower than that in the previous oxidation tank;
The bottom of the oxidation tank groove is provided with an air supply device, the inlet and the outlet of the oxidation tank groove are both provided with U-shaped liquid seal structures, the liquid level in the oxidation tank groove is higher than the lowest point of the U-shaped liquid seal structures, and the oxidation tank groove is internally provided with a cloth guide roller for limiting jean fabrics to be lower than the liquid level;
The dye recycling process uses a recycling tank, an aeration device is arranged at the bottom of the recycling tank, a waste water pipe communicated to the recycling tank is arranged on the side face of the oxidation tank, an exhaust pipe communicated to the aeration device is arranged at the top of the oxidation tank, and a heating device is arranged in the recycling tank.
2. The process for environmental-friendly fading treatment of jean fabric according to claim 1, wherein in the singeing process, singeing is carried out on both the front side and the back side of the jean fabric.
3. The environment-friendly fading treatment process of jean fabric according to claim 1, wherein the treatment temperature of the desizing procedure is 50 ℃, and the concentration of desizing enzyme is 12g/L-15g/L.
4. The process for environmental-friendly bleaching of jean fabric according to claim 1, wherein the bleaching process further comprises a hairiness removing process, wherein hairiness on the surface of the jean fabric is removed by using cellulase.
5. The process for environmental-friendly fading treatment of jean fabric according to claim 1, wherein the fading process further comprises a reduction process and an anti-yellowing process, the reduction process uses a reducing agent to remove residual ozone on the surface of the jean fabric, and the anti-yellowing process uses an anti-yellowing agent to perform anti-yellowing treatment on the jean fabric by using a padding method.
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| CN115748269A (en) * | 2022-12-01 | 2023-03-07 | 吉林省荣发服装服饰有限公司 | Worn-out processing method of clothes |
| CN116620953B (en) * | 2023-07-24 | 2023-09-19 | 江苏长江智能制造研究院有限责任公司 | Machine vision-based broken filament cleaning equipment |
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