CN211394932U - Pulse type supercritical carbon dioxide printing and dyeing device - Google Patents
Pulse type supercritical carbon dioxide printing and dyeing device Download PDFInfo
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- CN211394932U CN211394932U CN201922284715.5U CN201922284715U CN211394932U CN 211394932 U CN211394932 U CN 211394932U CN 201922284715 U CN201922284715 U CN 201922284715U CN 211394932 U CN211394932 U CN 211394932U
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- 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
- D06B23/14—Containers, e.g. vats
- D06B23/18—Sealing arrangements
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- 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, distillation
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- 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
- D06B3/04—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating of yarns, threads or filaments
- D06B3/09—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating of yarns, threads or filaments as packages, e.g. cheeses
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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
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/94—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using dyes dissolved in solvents which are in the supercritical state
Abstract
The utility model discloses a pulsed supercritical carbon dioxide printing device, include: CO22A storage tank, a three primary color tank, a dye tank, a pulse generator, a dyeing kettle, a dye collecting tank, a decompression cooling unit, an extraction separation unit, and CO2The storage tank is connected with the dye through the three primary color tank sequentially by the filtering unit, the drying unit, the heating unit and the pressurizing unitA tank; the dyeing tank is connected with the dyeing kettle sequentially through an auxiliary agent tank, a flow meter and a plurality of pulse type injectors connected in parallel, and each pulse type injector is respectively connected with a plurality of liquid inlet holes on each section of dyeing kettle; a double-core ultrasonic generating device and a bidirectional circulating pump are arranged on each dyeing kettle; the bottom of the dyeing kettle is connected with a dye tank and a dye collecting tank through a pipeline. The optimal dye liquor conveying condition can be realized by adopting pulse type conveying, and the printing and dyeing uniformity and the printing and dyeing efficiency are improved; and the printing and dyeing process is environment-friendly, clean in production, good in economic benefit and remarkable in environmental benefit.
Description
Technical Field
The utility model relates to a printing and dyeing technical field especially relates to a pulsed supercritical carbon dioxide printing device.
Background
The existing supercritical carbon dioxide printing and dyeing process only realizes semi-continuity, and a dyeing kettle does not have heat preservation and insulation measures, so that a large amount of heat is lost in the process flow; only a one-way circulating pump is arranged in the dyeing process, so that the dyeing uniformity of the product has certain problems; the existing dyeing auxiliary agent does not achieve the best dyeing assisting effect; the existing supercritical carbon dioxide printing and dyeing process is not effectively combined with the action of ultrasound; the residual dye liquor is not recycled, which can realize continuous and cyclic production, and the factors cause that the prior supercritical carbon dioxide printing and dyeing process is in the states of low efficiency, large energy consumption, high cost and low benefit, and the problems of substandard product uniformity and long equipment exist. Therefore, there is a need to develop a printing and dyeing process which can realize green environmental protection, clean production, recycling, high yield and low cost.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: aiming at the defects in the prior art, the pulse type supercritical carbon dioxide printing and dyeing device is provided.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a pulsed supercritical carbon dioxide printing device, include: CO2 holding vessel, three primary colors jar, dyestuff jar, impulse generator, dyeing cauldron, dyestuff collection tank, decompression cooling unit and extraction separation unit, wherein:
the CO2 storage tank is connected with the dye tank through the three-primary-color tank sequentially through a filtering unit, a drying unit, a heating unit and a pressurizing unit through a pipeline, so that carbon dioxide in the CO2 storage tank is converted into supercritical carbon dioxide after being pressurized and heated, and the supercritical carbon dioxide is mixed with three-primary-color dyes in the three-primary-color tank in the dye tank according to a certain proportion to form dye liquor;
the dyeing tank is connected with the dyeing kettle through an auxiliary agent tank, a flowmeter and a plurality of pulse type injectors connected in parallel in sequence through pipelines, each pulse type injector is respectively connected with a plurality of liquid inlet holes sequentially arranged at the top and/or the bottom of each section of dyeing kettle, and is used for feeding dye liquor into each section of dyeing kettle through the pulse type injectors in a pulse type injection mode to dye spindles from a spindle feeding end; a dual-core ultrasonic generator and a dual-direction circulating pump are arranged on each section of the dyeing kettle, two ends of the dual-direction circulating pump are respectively connected with the pulse type injector and the dyeing kettle through Y-shaped interfaces, and the two Y-shaped interfaces are respectively positioned at the liquid inlet holes at two ends of the bottom of each section of the dyeing kettle;
the bottom of the dyeing kettle is connected with the dye tank through a pipeline so as to enable the residual dye liquor discharged by the dyeing kettle to flow back to the dye tank for recycling; or the bottom of the dyeing kettle is connected with the dye collecting tank through a pipeline, so that the residual dye liquor after dyeing in the dyeing kettle is collected in the dye collecting tank, and is separated and purified into liquid carbon dioxide and dye, and then the liquid carbon dioxide and the dye are respectively conveyed to the CO2 storage tank and the dye tank through pipelines for cyclic utilization or storage for later use.
Furthermore, the bottom of the dyeing kettle is connected with the decompression cooling unit through the dye collecting tank through a pipeline so as to collect the residual dye liquor dyed in the dyeing kettle in the dye collecting tank, and the decompression cooling unit is used for decompressing and separating the residual dye liquor.
Furthermore, the top end of the decompression cooling unit is connected with the CO2 storage tank through a purification unit, a filtering unit and a drying unit in sequence through pipelines so as to send the separated carbon dioxide gas into the CO2 storage tank for recycling.
Further, the bottom end of the decompression cooling unit is connected with the extraction separation unit through a pipeline so as to extract the separated dye liquor, the extracted dye is sent into the dye tank for recycling, and/or the extracted auxiliary agent is sent into the auxiliary agent tank for recycling.
Furthermore, the dyeing kettle is composed of a pipeline of 24-25 meters, and a heat preservation and insulation layer is coated on the dyeing kettle.
Furthermore, the dyeing kettle is divided into four sections along the length direction, and each section of the dyeing kettle is provided with the pulse type injector, the ultrasonic generator and the bidirectional circulating pump.
Preferably, liquid inlet holes are formed in positions 1000mm, 3000mm and 5000mm away from the spindle outlet end of each section of the dyeing kettle respectively, and the liquid inlet holes are connected with the pulse type injector through pipelines.
Further preferably, liquid discharge holes are respectively formed at positions 375mm, 625mm, 875mm and 1125mm away from the spindle outlet end of each section of the dyeing kettle, and the liquid discharge holes are connected with the dye tank and the dye collecting tank through pipelines.
More preferably, the liquid discharge hole and the liquid inlet hole are both in a large-small head structure and are formed by an upper hole and a lower hole.
Further, an included angle between the two interfaces in the direction of the two ports on the Y-shaped interface is 90 degrees.
The above technical scheme is adopted in the utility model, compared with the prior art, following technological effect has:
(1) the pulse supercritical carbon dioxide printing and dyeing device completes a group of forward and reverse circulation by configuring a bidirectional circulating pump and taking 4-5 minutes as a unit, so that the dyeing uniformity of a product is improved; configuring a pulse type injection machine, and performing pulse type injection of dyes at the upper end and the lower end of a group at the same time by taking 0.5-1 minute as a unit; meanwhile, the same-frequency ultrasonic waves are added, so that the activity of dye molecules and dyeing-assisting molecules is improved, the diffusion and adsorption processes of the dye molecules are accelerated, and the dyeing efficiency is improved;
(2) the pulse type supercritical carbon dioxide printing and dyeing device adopts the Y-shaped interface to simultaneously connect the pulse type injection machine, the two-way circulating pump and the dyeing kettle, so that the flowability of the dye solution can be accelerated and the uniformity of the dye solution injected by the pulse type injection machine and the original dye solution in the dyeing kettle can be improved no matter the two-way circulating pump circulates in the positive direction or the negative direction, and the color difference is prevented, thereby improving the dyeing uniformity and the product quality;
(3) according to the pulse supercritical carbon dioxide printing and dyeing device, the auxiliary agent is added into the dissolved dye solution, so that the dyeing process is faster, and the absorption of the spindle to the dye is stronger; one spindle can be successfully dyed within 30min, and the spindle enters the product collecting trolley from the spindle outlet end at the time interval of about 18 seconds;
(4) according to the pulse type supercritical carbon dioxide printing and dyeing device, the residual dye liquid collector is additionally arranged at the spindle outlet end, holes are respectively formed at positions 375mm, 625mm, 875mm and 1125mm away from the spindle outlet end to be connected with the residual dye liquid collector to collect residual dye liquid, supercritical carbon dioxide is separated from dye and auxiliaries through the pressure reduction separation device, the dye and the auxiliaries are separated through an extraction mode, and then the supercritical carbon dioxide, the dye and the auxiliaries are respectively purified and dried and circulated to the raw material bin; the process for printing and dyeing by using the supercritical carbon dioxide can realize green, environment-friendly, clean production, recycling, high yield and low cost;
(5) the existing dye liquor conveying mode is pressure conveying, the pulse type supercritical carbon dioxide printing and dyeing device adopts pulse type conveying, the pulse frequency is changed according to different printed and dyed materials, different time periods in the printing and dyeing process and different sections in a dyeing kettle, and the pulse frequency is accurately regulated and controlled from time to time so as to achieve the optimal dye liquor conveying condition; the pulse type conveying is also beneficial to increasing the chaos degree of the dye liquor in the dyeing kettle, simultaneously enhances the convection of the dye liquor, and can improve the uniformity and efficiency of printing and dyeing;
(6) the pulse supercritical carbon dioxide printing and dyeing device has the advantages that the pressure born by the pulse supercritical carbon dioxide printing and dyeing device is reduced by 30-46%, and compared with the common equipment, the printing and dyeing temperature is reduced by 25-33%, so that the equipment cost and the heat supply cost are greatly reduced; compared with the printing and dyeing efficiency of the existing process equipment, the printing and dyeing efficiency is improved by 16-33%; because of the configuration of the dual-core ultrasonic wave, the dyeing is more uniform, the color difference of the inner and outer coils is greatly reduced, and the color fastness of the fabric is improved and can reach 5 grades at most.
Drawings
Fig. 1 is a schematic structural diagram of a pulse supercritical carbon dioxide printing and dyeing device of the present invention;
FIG. 2 is a schematic structural diagram of an ingot feeding end of an 1/4 dyeing kettle in the pulse supercritical carbon dioxide printing and dyeing device of the present invention;
FIG. 3 is a schematic partial enlarged view of a portion A of the ingot feeding end of the dyeing kettle shown in FIG. 2;
FIG. 4 is a schematic structural view of an ingot outlet end of a dyeing kettle in the pulse supercritical carbon dioxide printing and dyeing device of the present invention;
FIG. 5 is a schematic partial enlarged structural view of a part B in the spindle outlet end of the dyeing kettle shown in FIG. 2;
fig. 6 is a schematic structural view of a Y-shaped interface in a pulse supercritical carbon dioxide printing and dyeing apparatus according to the present invention;
FIG. 7 is a schematic structural view of a yarn bobbin in a pulse supercritical carbon dioxide printing and dyeing apparatus according to the present invention;
fig. 8 is a graph showing the diffusion profile of the dye in the fiber in a pulse supercritical carbon dioxide printing and dyeing process according to the present invention.
Detailed Description
The present invention will be described in detail and specifically with reference to specific embodiments so as to provide a better understanding of the present invention, but the following embodiments do not limit the scope of the present invention.
Example 1
Referring to fig. 1, the present embodiment provides a pulse supercritical carbon dioxide printing and dyeing apparatus, including: CO22The dye liquor comprises a storage tank, three primary color tanks, a dye tank, a pulse generator, a dyeing kettle, a dye collecting tank, a pressure reduction cooling unit and an extraction separation unit, wherein the three primary color tanks comprise a red tank, a yellow tank and a blue tank which are arranged in parallel, red, yellow and blue three primary color dyes are respectively arranged in the red tank, the yellow tank and the blue tank, and the red, yellow and blue three primary color dyes are respectively installed according to a certain proportion and are respectively mixed with supercritical carbon dioxide to form dye liquor with a specific color. The dyeing kettle is composed of a pipeline of 24-25 meters, and a heat preservation and insulation layer is coated on the dyeing kettle; and is divided into four sections along the length direction, and each section of the dyeing kettle is provided with the pulse type injector, the ultrasonic generator and the bidirectional circulating pump.
In this embodiment, please refer to FIG. 1, wherein the CO is2The storage tank passes through the filtering unit, the drying unit and the heating unit sequentially through the pipelineThe element and pressurizing unit is connected with the dye tank through the three primary color tank to ensure that the CO is absorbed2The carbon dioxide in the storage tank is converted into supercritical carbon dioxide after pressurization and heating treatment, and the supercritical carbon dioxide is respectively mixed with the three-primary-color dyes in the three-primary-color tanks according to a certain proportion in the dye tank to form dye liquor.
In this embodiment, please refer to fig. 1, the dye tank is connected to the dyeing kettle sequentially through an auxiliary tank, a flow meter and a plurality of pulse type injectors connected in parallel through a pipeline, each pulse type injector is connected to a plurality of liquid inlet holes sequentially arranged at the top and/or the bottom of each section of the dyeing kettle respectively, and is used for feeding dye liquor into each section of the dyeing kettle in a pulse type injection manner through the pulse type injector to dye spindles from a spindle inlet end; every section be provided with a binuclear ultrasonic wave generating device and a bidirectional circulating pump on the dyeing kettle, the both ends of bidirectional circulating pump adopt Y shape interface connection respectively pulsed injector with the dyeing kettle, and two Y shape interface is located every section respectively dyeing kettle bottom both ends inlet opening department.
In this embodiment, please refer to fig. 1, the bottom of the dyeing kettle is connected to the dye tank through a pipeline, so as to return the residual dye solution discharged from the dyeing kettle to the dye tank for recycling; or the bottom of the dyeing kettle is connected with the dye collecting tank through a pipeline, so that the residual dye liquor after dyeing in the dyeing kettle is collected in the dye collecting tank, and is separated and purified into liquid carbon dioxide and dye which are then respectively conveyed to the CO through pipelines as a liquid carbon dioxide raw material and a dye raw material2The storage tank and the dye tank are recycled or stored for later use.
In this embodiment, please refer to fig. 1, the bottom of the dyeing kettle is connected to the decompression cooling unit through the dye collecting tank via a pipeline, so as to collect the residual dye solution dyed in the dyeing kettle in the dye collecting tank, and the decompression cooling unit decompresses and separates the residual dye solution; the top end of the decompression cooling unit sequentially passes through the purification unit, the filtering unit and the drying unit through pipelinesLinking the CO2A storage tank for feeding the separated carbon dioxide gas to the CO2The storage tank is recycled; and the bottom end of the decompression cooling unit is connected with the extraction separation unit through a pipeline so as to extract the separated dye liquor, the extracted dye is sent into the dye tank for recycling, and/or the extracted auxiliary agent is sent into the auxiliary agent tank for recycling.
Referring to fig. 2-3, a structural schematic diagram of a quarter length dyeing kettle is shown, wherein the dyeing kettle is at least divided into one section along the length direction. Specifically, the total length of the dyeing kettle is 24-25m, the dyeing kettle is divided into 4 sections along the length direction, the length L16 of each section of the dyeing kettle is 5000-7000mm, preferably 6000mm, and the outer diameter R1 of each section of the dyeing kettle is 220-280mm, preferably 245 mm; the inner diameter R2 of each section of the dyeing kettle is 150-210mm, and is preferably 175 mm. The pulse type injector is respectively connected with the positions L11, L13 and L15 away from the top and the bottom of the dyeing inlet end of each dyeing kettle, and liquid inlet holes are sequentially formed in the positions L11 is 1200mm away from the inlet end, preferably 1000mm away from the inlet end; the L13 is located 2800-3200mm from the inlet end, preferably 3000mm, the L15 is located 400-5200mm from the inlet end, preferably 5000 mm.
As a preferred technical scheme, the pulse type injector is respectively connected to the top and the top of the dyeing kettle at the positions of 1000mm, 3000mm and 5000mm, 6 liquid inlet holes are formed in total, each liquid inlet hole is in a big-end and small-end structure and is formed by an upper hole and a lower hole, and the total height R3 of each liquid inlet hole is 30-40mm, preferably 35 mm; the height of the upper hole is R4 and is 20-30mm, preferably 25 mm; the diameter R7 of the upper hole is 25-30mm, preferably 26.1; the upper hole is open, the opening angle is 60 degrees, and the opening height R8 is 2-3mm, preferably 2.39 mm. The height R6 of the lower hole is 8-12mm, preferably 9 mm; the diameter R5 of the lower hole is 3-8mm, preferably 6 mm.
As a preferable technical scheme, two ends of the bidirectional circulating pump are respectively connected with the lower ends of the ingot feeding ends L11-1000mm and L15-5000mm of each section of the dyeing kettle, two ends of the bidirectional circulating pump are respectively communicated with the pulse type injector and the dyeing kettle through Y-shaped interfaces, two interfaces in the double-port direction on each Y-shaped interface are connected with the bidirectional circulating pump and the pulse type injector, and one interface in the single-port direction on each Y-shaped interface is connected with liquid inlet holes at two ends of the bottom of the dyeing kettle.
As a preferred technical scheme, the pulse supercritical carbon dioxide printing and dyeing device of the embodiment aims at the defect that the uniformity of product dyeing has a certain problem because only a one-way circulating pump is arranged on the existing dyeing kettle and the dye is injected continuously from top to bottom in a one-way mode. 4 bidirectional circulating pumps are sequentially arranged on the dyeing kettle, and a group of forward and reverse circulation is completed in 4-5 minutes, so that the dyeing uniformity of the product is improved; 4 pulse injection machines are configured to complete simultaneous pulse injection of dye at the upper end and the lower end of a group in 0.5-1 minute; 4 same-frequency ultrasonic waves are configured, so that the activity of dye molecules and dyeing assisting molecules is improved, the diffusion and adsorbed processes of the dye molecules are accelerated, and the dyeing efficiency is improved.
Referring to fig. 1, on the whole dyeing kettle, each section of the dyeing kettle is provided with the pulse injector, the ultrasonic generator and the two-way circulating pump, and four sections of the dyeing kettle are provided with four two-way circulating pumps, so that 8Y-shaped interfaces are additionally arranged in total, and 2 dyeing kettles are arranged on each section of the dyeing kettle. An axial included angle between two interfaces in the double-port direction on the Y-shaped interface is 90 degrees, and the length Y1 of the interface in the single-port direction on the Y-shaped interface is 40-60mm, preferably 50 mm; the length Y2 of the two interfaces in the direction of the two ports on the Y-shaped interface is 70-90mm, preferably 80 mm; the inner diameter Y3 of the three interfaces on the Y-shaped interface is 15-25mm, preferably 20 mm; the outer diameter Y4 of the three ports on the Y-shaped port is 20-30mm, and preferably 26 mm. Two interfaces in the direction of the two ports of the Y-shaped interface are respectively and tightly matched with the pulse type injector and the connecting pipe of the bidirectional circulating pump in an interference manner. The connecting pipe of the Y-shaped interface and the pulse type injector is provided with a one-way valve; and a two-way valve is arranged on a connecting pipe of the Y-shaped interface and the two-way circulating pump, and the switch of the two-way valve is automatically regulated and controlled according to the output direction of the two-way circulating pump.
In this embodiment, please refer to fig. 6, the interfaces corresponding to the two interfaces of the Y-shaped interface are in a single-port direction, the single-port direction of the Y-shaped interface is tightly fitted to the inlets at the lower ends of the dyeing kettle at the positions of 1000mm and 5000mm in an interference manner, and the tight fitting with the interference can prevent leakage of high-pressure liquid better than threaded connection. Adopt the biggest advantage of Y shape interface to be can connect pulsed syringe and two-way circulating pump simultaneously, no matter two-way circulating pump is to positive direction or negative direction circulation can all accelerate the mobility of dye liquor and improve the homogeneity of the original dye liquor in the dye liquor that is injected by the pulsed syringe and the dyeing cauldron, prevent the colour difference, thereby improve the homogeneity of dyeing, improve product quality, also can reduce the trompil quantity on the dyeing cauldron, can reduce the flow resistance to high-pressure liquid than ordinary tee bend interface simultaneously, thereby improve equipment's security, in addition, Y shape interface and two-way valve synergism can prevent because of the influence and the damage of the dye liquor of pulsed injection to two-way circulating pump, thereby improve equipment stability and life.
In the embodiment, please refer to fig. 3-4, which are directed to the defect that the existing spindle discharging end is not provided with a residual dye solution collector, which makes it difficult to recycle the waste materials and has a high cost. A residual dye liquor collecting tank is additionally arranged at the spindle outlet end of the dyeing kettle; liquid discharge holes are respectively formed at positions L21, L22, L23 and L24 which are away from the bottom of the spindle outlet end of the dyeing kettle, wherein the position L21 is 400mm away from the spindle outlet end, preferably 375 mm; the L22 is at a distance of 600-650mm from the ingot outlet end, preferably at a distance of 625 mm; the L23 is positioned at a distance of 850-900mm from the ingot outlet end, preferably at a position of 875 mm; the L24 is located 1150mm, preferably 1125mm from the spindle outlet end 1100-. Namely, as a preferred embodiment, the four liquid discharge holes are sequentially arranged at the positions 375mm, 625mm, 875mm and 1125mm away from the spindle outlet end at the bottom of the dyeing kettle respectively, and each liquid discharge hole is connected with the dye tank and the dye collecting tank through a pipeline. The liquid discharge hole and the liquid inlet hole are the same in structure and are both in a large-small head structure. The total height R3 of the liquid discharge hole is 30-40mm, preferably 35 mm; the height of the upper hole is R4 and is 20-30mm, preferably 25 mm; the diameter R7 of the upper hole is 25-30mm, preferably 26.1; the upper hole is open, the opening angle is 60 degrees, and the opening height R8 is 2-3mm, preferably 2.39 mm. The height R6 of the lower hole is 8-12mm, preferably 9 mm; the diameter R5 of the lower hole is 3-8mm, preferably 6 mm.
In this embodiment, as a preferred technical scheme, still be provided with the manometer on the dyeing kettle, the manometer is installed respectively at the opening of the upper end of 2000mm, 4000mm department apart from every section of dyeing kettle dyeing entry end, and the manometer is used for monitoring the pressure variation in the dyeing kettle. The dyeing process adopted by the embodiment can successfully dye one spindle within 30min, and the spindle enters the product collecting unit from the spindle outlet end at the time interval of about 18 seconds.
The pulse supercritical carbon dioxide printing and dyeing device provided by the embodiment overcomes the defect that a large amount of heat is lost in the process flow because the existing dyeing kettle does not have a heat preservation and insulation measure, and the dyeing kettle is additionally provided with the heat preservation and insulation layer, so that the heat loss in the printing and dyeing process engineering is reduced, the temperature stability in the printing and dyeing process is ensured, the energy consumption is reduced, and the printing and dyeing quality and efficiency are improved.
Compared with the existing supercritical carbon dioxide printing and dyeing technology, the pulse supercritical carbon dioxide printing and dyeing device provided by the embodiment has obvious advantages. The best effect comprehensively achieved by the existing supercritical carbon dioxide printing and dyeing technology is that the minimum printing and dyeing pressure is about 16-18 Mpa, and the printing and dyeing pressure of common equipment is 20-30 Mpa; the printing and dyeing temperature is about 110 ℃ at the lowest, and the printing and dyeing temperature of general equipment is 120-135 ℃; the printing and dyeing time is about 35-45 minutes. Compared with the existing common equipment, the pulse supercritical carbon dioxide printing and dyeing device provided by the embodiment of the invention has the advantages that the pressure born by the pulse supercritical carbon dioxide printing and dyeing device is reduced by 30% -46%, and compared with the printing and dyeing temperature of the existing common equipment, the pulse supercritical carbon dioxide printing and dyeing device is reduced by 25% -33%, so that the equipment cost and the heat supply cost are greatly reduced; compared with the prior art, the printing and dyeing efficiency is improved by 16-33%. Due to the configuration of the dual-core ultrasonic wave, dyeing is more uniform, the color difference of inner and outer coils is greatly reduced, and the color fastness of the fabric is improved to be up to 5 grade.
The pulse supercritical carbon dioxide printing and dyeing device has the working principle that: separating liquid carbon dioxide from CO2The storage tank sequentially passes through the heating unit, the pressurizing unit,Injecting the dye tank, the auxiliary agent tank and the feeding pump into a dyeing kettle through a pulse type injector, dyeing incoming materials from the ingot feeding end under the combined action of ultrasonic waves, bidirectional circulation and auxiliary agents, and sleeving a heat insulation layer on the periphery of the dyeing kettle; after the spindle is dyed and matured, the spindle leaves from the spindle outlet end and enters a product collecting trolley to be carried to the next procedure; dye liquor discharged from the dyeing kettle flows back to the dye tank for recycling; or separating and purifying the discharged dye liquor into liquid carbon dioxide and dye, and recycling or storing the liquid carbon dioxide and dye for later use. The dyeing dye conveying device has the advantages of no generation of dyeing wastewater and other wastes, capability of realizing green environmental protection and clean production, good economic benefit and remarkable environmental benefit, and can realize the purposes of recycling, flow production, yield improvement and industrial cost reduction.
Example 2
Referring to fig. 1, based on the above pulsed supercritical carbon dioxide printing and dyeing apparatus, the present embodiment provides a pulsed supercritical carbon dioxide printing and dyeing process suitable for printing and dyeing a printed matter for the first time or continuously printing and dyeing the same product, which includes the following steps: (1) separating liquid carbon dioxide from CO2The storage tank is sequentially subjected to pressurization and heating treatment through the filtering unit, the drying unit, the heating unit and the pressurizing unit and then is converted into supercritical carbon dioxide; (2) respectively introducing the converted supercritical carbon dioxide into a red tank, a yellow tank and a blue tank of the three primary colors to be mixed with red, yellow and blue dyes, and then introducing the mixed dyes into a dye tank according to a certain proportion to be mixed according to the requirement of spindle dyeing to form dye liquor; (3) injecting dye liquor into the dyeing kettle from liquid inlet holes at the top and the bottom of the dyeing kettle respectively by using a pulse type injector, dyeing the spindle from the spindle inlet end under the combined action of an ultrasonic generator and a bidirectional circulating pump, sleeving a heat insulation layer on the periphery of the dyeing kettle, sending the spindle out from the spindle outlet end after the spindle is dyed to be mature, and carrying the spindle into a product collecting unit to a next process; (4) and (4) directly reflowing the dye liquor discharged from the dyeing kettle to a dye tank to enter a printing and dyeing cycle without being collected by a dye collector, and recycling.
In this embodiment, please use the pressure increasing unit to increase the pressure of the carbon dioxide to more than 16MPa in step (1); the carbon dioxide is heated to a temperature above 80 ℃ by the heating unit. Namely, the carbon dioxide is converted into supercritical carbon dioxide by a pressurizing unit and a heating unit, the pressurizing unit adopts a booster pump, and the heating unit can adopt a heater.
In this embodiment, the step (2) further includes adding a dyeing assistant into the dye solution, the adopted dyeing assistant is suitable for supercritical carbon dioxide printing, and the dyeing assistant in the remaining dye solution can be separated from supercritical dioxide and dye to realize recycling.
In this embodiment, the working power of the ultrasonic generator in step (3) is 600W, so as to perform ultrasonic treatment on the dye liquor and the spindle in the dyeing kettle, and the ultrasonic generator adopts a dual-core ultrasonic generating device; the ultrasonic generator is arranged on the dyeing kettle, so that the activity of dye molecules and dyeing assisting molecules can be improved, the diffusion and adsorbed processes of the dye molecules are accelerated, and the dyeing efficiency is improved. In addition, a bidirectional circulating pump is arranged on the dyeing kettle, so that forward and reverse bidirectional circulation of the dye in the dyeing kettle can be realized, the dyeing uniformity of the product is improved, and a set of forward and reverse circulation processes are completed within 4-5 minutes; and the bidirectional circulating pump can be used for regulating the speed, and the circulating speed of the dye liquor can be regulated for different fabrics. Specifically, the dye liquor is circulated in the dyeing kettle at a speed of 2.4m/min by using a bidirectional circulating pump, and the spindle advances in the dyeing kettle at a range of 1.2m/min and is dyed.
In this embodiment, the spindle to be dyed in step (3) is heated, swelled and dried before entering the dyeing kettle, so as to improve the dyeing speed and the dyeing quality of the dye in the dyeing kettle. In addition, the step (3) further comprises the step of carrying out heat preservation and insulation treatment on the dyeing kettle in the dyeing process, wherein the heat preservation and insulation are realized by arranging a heat preservation and insulation sleeve askew in the dyeing kettle, and the heat preservation and insulation design can reduce heat loss and improve the stability of the dyeing temperature in the dyeing process, thereby improving the economic benefit and reducing the energy consumption.
Example 3
Referring to FIG. 1, unlike the above-described embodiment 2, the present embodiment is based on the above-described pulse type supercritical carbon dioxide printing apparatusThe embodiment provides a pulse type supercritical carbon dioxide printing and dyeing process suitable for printing and dyeing product shutdown, which comprises the following steps: (1) separating liquid carbon dioxide from CO2The storage tank is sequentially subjected to pressurization and heating treatment through the filtering unit, the drying unit, the heating unit and the pressurizing unit and then is converted into supercritical carbon dioxide; (2) respectively introducing the converted supercritical carbon dioxide into a red tank, a yellow tank and a blue tank of a three-primary-color tank to be mixed with red, yellow and blue dyes, and then introducing the mixed supercritical carbon dioxide into a dye tank according to a certain proportion to be mixed according to the requirement of spindle dyeing to form dye liquor; (3) injecting dye liquor into the dyeing kettle from liquid inlet holes at the top and the bottom of the dyeing kettle respectively by using a pulse type injector, dyeing the spindle from the spindle inlet end under the combined action of an ultrasonic generator and a bidirectional circulating pump, sleeving a heat insulation layer on the periphery of the dyeing kettle, sending the spindle out from the spindle outlet end after the spindle is dyed to be mature, and carrying the spindle into a product collecting unit to a next process; (4) the residual dye is collected by the dye collecting tank, the supercritical carbon dioxide, the dye and the auxiliary agent are separated by the decompression cooling unit, then the dye and the auxiliary agent are separated by an extraction mode, and then the supercritical carbon dioxide, the dye and the auxiliary agent are respectively purified and dried and then respectively recovered and stored for later reuse or subsequent unified treatment.
Example 4
Referring to fig. 1, unlike the embodiment 2, the embodiment provides a pulse type supercritical carbon dioxide printing process suitable for the same front and back printed materials with a small variation degree, which includes the following steps: (1) separating liquid carbon dioxide from CO2The storage tank is sequentially subjected to pressurization and heating treatment through the filtering unit, the drying unit, the heating unit and the pressurizing unit and then is converted into supercritical carbon dioxide; (2) respectively introducing the converted supercritical carbon dioxide into a red tank, a yellow tank and a blue tank of the three primary colors to be mixed with red, yellow and blue dyes, and then introducing the mixed dyes into a dye tank according to a certain proportion to be mixed according to the requirement of spindle dyeing to form dye liquor; (3) injecting dye liquor into the dyeing kettle from the liquor inlet holes at the top and the bottom of the dyeing kettle respectively by adopting a pulse type injector, and emitting the dye liquor by ultrasonic wavesDyeing the spindle from the spindle feeding end under the combined action of the generator and the bidirectional circulating pump, sleeving a heat-insulating layer on the periphery of the dyeing kettle, sending the dyed spindle out from the spindle discharging end after the dyeing is mature, and conveying the dyed spindle into a product collecting unit to a next process; (4) collecting residual dye by a dye collecting tank, separating supercritical carbon dioxide, dye and auxiliary agent by a decompression cooling unit, separating the dye and the auxiliary agent by an extraction mode, respectively purifying and drying the supercritical carbon dioxide, the dye and the auxiliary agent, respectively purifying and drying the purified and dried supercritical carbon dioxide, the dye and the auxiliary agent, and circulating the purified and dried supercritical carbon dioxide, the dye and the auxiliary agent to CO2A storage tank, a dye tank and an auxiliary agent tank.
Application example 1
Based on the pulse type supercritical carbon dioxide printing and dyeing process and the device, the application example provides a process for dyeing synthetic fibers (polyester fabrics). As shown in figure 1, the process consists of six parts and comprises a complete automatic flow process, wherein the process comprises CO2A storage tank section, a pressurization section, a heating section, a dye mixing section, a two-cycle ultrasonic printing section, and a dye cycle section.
During the printing and dyeing process, liquid carbon dioxide is separated from CO2The storage tank flows out, sequentially enters the dyeing kettle through the filtering unit, the drying unit, the heating unit, the pressurizing unit, the dyeing tank, the auxiliary agent tank and the feeding pump through the pulse type injector, the spindle which is subjected to preheating treatment and drying treatment in the dyeing kettle and the dye which is injected into the dyeing kettle in the pulse type dye under the combined action of KC-TC01 dual-core ultrasonic waves and a bidirectional circulating pump, and the periphery of the dyeing kettle is sleeved with a heat insulation layer. Wherein, the pressurizing unit (booster pump) is required to pressurize the carbon dioxide to more than 16 MPa; the heating unit (heater) needs to heat the carbon dioxide to be above 100 ℃; respectively introducing supercritical carbon dioxide into the three-primary-color tank to dissolve the dye, and then converging the supercritical carbon dioxide into the dye tank to form a dye solution; the auxiliary agent tank does not need to be added with any dye, and the dye solution directly passes through the auxiliary agent tank; KC-TC01 dual-core ultrasonic working power is 600W, the dye liquor is circulated in the dyeing kettle at a speed of 2.4m/min by the bidirectional circulating pump, the uniformity of the dye is improved, and the spindle moves forward in the dyeing kettle at a range of 1.2m/min and is dyed. After the spindle is dyed to be mature,and the ingot is separated from the ingot outlet end and enters a product collecting unit to be carried to the next procedure. The residual dye which flows out does not pass through the dye collector for collection, directly flows back to the dye tank to enter the printing and dyeing cycle again, and is recycled.
Based on the process of dyeing synthetic fibers (polyester fabrics) in the embodiment, a method for constructing a mass transfer model of the synthetic fibers (polyester fabrics) in the printing and dyeing process is provided:
as shown in fig. 8, a one-dimensional coordinate system with the fiber center as the axis and the fiber radial direction as the x-axis. The dye precipitates on the surface of the fiber and then diffuses into the fiber.
The dye diffusion process in the fiber follows:
in the formula: cA-the dye molarity at any time and at any position in the fiber;
DAB-diffusion coefficient of dye atoms in the fiber;
the process of precipitation of the dye solution on the surface of the fiber follows:
NA＝k(CAf-CA0) (2)
in the formula: cAf-the molar concentration of the dye in supercritical carbon dioxide;
CA0initial dye concentration in the center of the fiber, generally CA0＝0
The magnitude of the convection intensity coefficient k is influenced by the dye flow regime:
in the formula: dAf-diffusion coefficient of the dye in supercritical carbon dioxide;cf-dye concentration boundary layer thickness in supercritical carbon dioxide;
thickness of concentration boundary layercfIn relation to the velocity boundary layer of the flow
In the formula: sC-a schmitt number; v-the viscosity coefficient of supercritical carbon dioxide;ν-velocity boundary layer thickness of supercritical carbon dioxide fluid; n-constant;
in the formula:
average velocity of fluid
Rho-density of supercritical carbon dioxide dye fluid
Eta-viscosity of supercritical carbon dioxide dye fluids
Rex-Reynolds number of dye fluid
Substituting formula (6) for formula (4) to obtain:
as can be seen from the equations (7) and (8), the higher the fluid velocity, the higher Rex, and the more intense the convection, the higher the fluid velocitycfThe smaller, the
The larger the degree of convection at the fiber surface. If the convective extent is more rapid than the diffusion of the dye from the surface to the interior, the dye is deposited on the surface, increasing the diffusion of the dye into the interior of the fiberThe drag, preferably both, speeds being balanced, i.e.
From the verification, the pressure P in the dyeing kettle can be increased by introducing the dye solution through the pulse type injector, so that the saturated concentration of the dye fluid is increased, the concentration difference between the dye fluid and the dye in the fiber is enlarged, and the delta C is increasedA＝(CAf-CA0) Will also rise; on the other hand, when the fuel is introduced in a pulse mode, the convection of the dye is strengthened, the mass transfer coefficient is increased, and the precipitation amount of the dye on the surface of the fiber is increased due to the combination of the two aspects. When the precipitation speed of the dye on the surface of the fiber is far greater than the diffusion speed of the dye in the fiber, dye molecules are deposited on the surface of the fiber, the diffusion resistance of the dye to the interior of the fiber is correspondingly increased along with the thickening of the deposited layer, and the printing and dyeing speed is reduced, so that the pressure P also has to be reasonably controlled, and the deposition speed of the dye on the surface of the fiber is basically balanced with the diffusion speed of the dye to the interior of the fiber.
Application example 2
Based on the pulse type supercritical carbon dioxide printing and dyeing process and the device, the application example provides a process for dyeing and processing synthetic natural fibers (cotton, hemp and wool fabrics). As shown in FIG. 1, the process consists of seven major parts into a complete automated flow process, including CO2The device comprises a storage tank part, a pressurizing part, a heating part, a dye mixing part, an auxiliary agent part, a double-circulation ultrasonic printing and dyeing part and a dye circulation part.
During the printing and dyeing process, liquid carbon dioxide is separated from CO2The storage tank flows out, sequentially passes through the filtering unit, the drying unit, the heating unit, the pressurizing unit, the dyeing tank, the auxiliary agent tank and the feeding pump and enters the dyeing kettle through the pulse type injector, the spindle which is preheated, swollen by absolute ethyl alcohol and subjected to drying treatment in the dyeing kettle and the dye which is injected into the dyeing kettle in the pulse type carry out dyeing under the combined action of KC-TC01 dual-core ultrasonic waves and a bidirectional circulating pump, and the periphery of the dyeing kettle is sleeved with a heat-insulating layer. Wherein the pressurizing unit (booster pump)The pressure of the carbon dioxide is required to be increased to 16 MPa; the heating unit (heater) needs to heat the carbon dioxide to 80 ℃; respectively introducing supercritical carbon dioxide into the three-primary-color tank to dissolve the dye, and then converging the supercritical carbon dioxide into the dye tank to form a dye solution; the auxiliary agent tank needs to be added with absolute ethyl alcohol as an auxiliary dyeing agent, so that the reactive dye is more fully dissolved in the supercritical carbon dioxide, and the dye solution is more uniform; the KC-TC01 dual-core ultrasonic working power is 600W, the dye liquor is circulated in the dyeing kettle at the speed of 3m/min by the bidirectional circulating pump, the uniformity of the dye is improved, and the spindle moves forward in the dyeing kettle at the amplitude of 1.2m/min and is dyed. After the spindle is dyed to be mature, the spindle leaves from the spindle outlet end and enters a product collecting unit to be carried to the next procedure. The residual dye which flows out does not pass through the dye collector for collection, directly flows back to the dye tank to enter the printing and dyeing cycle again, and is recycled.
By adopting the application example 1 and the application example 2 of the supercritical carbon dioxide printing and dyeing process and the supercritical carbon dioxide printing and dyeing device, a spindle can be dyed successfully within 30min, the spindle comes out from the spindle outlet end at a time interval of about 18 seconds, and the length of equipment can be controlled within 30 m; compared with the prior art, the efficiency is improved by about 20 percent at least, the equipment is reduced by about 25 percent, and the cost is reduced by about 10 percent at least; the supercritical carbon dioxide printing and dyeing process and the supercritical carbon dioxide printing and dyeing device can realize the processes of printing and dyeing synthetic fibers and natural fibers by using the supercritical carbon dioxide, which are environment-friendly, clean in production, recycled, high in yield and low in cost, improve the uniformity of dyeing of fabrics on the inner side and the outer side of a spindle, and simultaneously improve the color fastness of the fabrics, and the highest level can reach 5.
The above detailed description of the embodiments of the present invention is only for exemplary purposes, and the present invention is not limited to the above described embodiments. Any equivalent modifications and substitutions to those skilled in the art are also within the scope of the present invention. Accordingly, variations and modifications in equivalents may be made without departing from the spirit and scope of the invention, which is intended to be covered by the following claims.
Claims (10)
1. Pulse-taking deviceTowards supercritical carbon dioxide printing device of formula, its characterized in that includes: CO22Storage tank, three primary colors jar, dyestuff jar, impulse generator, dyeing cauldron, dyestuff collection tank, decompression cooling unit and extraction separation unit, wherein:
the CO is2The storage tank is connected with the dye tank through the three primary color tank sequentially by a pipeline passing filtering unit, a drying unit, a heating unit and a pressurizing unit so as to enable the CO to pass through the dye tank2The carbon dioxide in the storage tank is converted into supercritical carbon dioxide after pressurization and heating treatment, and the supercritical carbon dioxide is respectively mixed with the three-primary-color dyes in the three-primary-color tanks according to a certain proportion in the dye tank to form dye liquor;
the dyeing tank is connected with the dyeing kettle through an auxiliary agent tank, a flowmeter and a plurality of pulse type injectors connected in parallel in sequence through pipelines, each pulse type injector is respectively connected with a plurality of liquid inlet holes sequentially arranged at the top and/or the bottom of each section of dyeing kettle, and is used for feeding dye liquor into each section of dyeing kettle through the pulse type injectors in a pulse type injection mode to dye spindles from a spindle feeding end; a dual-core ultrasonic generator and a dual-direction circulating pump are arranged on each section of the dyeing kettle, two ends of the dual-direction circulating pump are respectively connected with the pulse type injector and the dyeing kettle through Y-shaped interfaces, and the two Y-shaped interfaces are respectively positioned at the liquid inlet holes at two ends of the bottom of each section of the dyeing kettle;
the bottom of the dyeing kettle is connected with the dye tank through a pipeline so as to enable the residual dye liquor discharged by the dyeing kettle to flow back to the dye tank for recycling; or the bottom of the dyeing kettle is connected with the dye collecting tank through a pipeline, so that the residual dye liquor after dyeing in the dyeing kettle is collected in the dye collecting tank, and is separated and purified into liquid carbon dioxide and dye which are then respectively conveyed to the CO through pipelines as a liquid carbon dioxide raw material and a dye raw material2The storage tank and the dye tank are recycled or stored for later use.
2. The pulsed supercritical carbon dioxide printing and dyeing apparatus according to claim 1, wherein the bottom of the dyeing kettle is connected to the reduced-pressure cooling unit through the dye collection tank via a pipeline, so that the residual dye liquor dyed in the dyeing kettle is collected in the dye collection tank, and the residual dye liquor is subjected to pressure reduction and separation treatment by the reduced-pressure cooling unit.
3. The pulsed supercritical carbon dioxide printing and dyeing apparatus according to claim 1, wherein the top of the reduced pressure cooling unit is connected to the CO via a purification unit, a filtration unit and a drying unit in sequence via pipes2A storage tank for feeding the separated carbon dioxide gas to the CO2The storage tank is recycled.
4. The pulse type supercritical carbon dioxide printing and dyeing device according to claim 1, characterized in that the bottom end of the decompression cooling unit is connected with an extraction separation unit through a pipeline to extract the separated dye liquor, the extracted dye is sent into the dye tank for recycling, and/or the extracted auxiliary agent is sent into the auxiliary agent tank for recycling.
5. The pulsed supercritical carbon dioxide printing and dyeing apparatus according to claim 1, wherein the dyeing vessel is a 24-25m pipe, which is covered with a thermal insulating layer.
6. The apparatus according to claim 1, wherein the dyeing vessel is divided into four sections along its length, and each section of the dyeing vessel is provided with the pulse-type injector, the ultrasonic generator, and the bidirectional circulation pump.
7. The pulse supercritical carbon dioxide printing and dyeing apparatus according to claim 6, wherein liquid inlet holes are formed at positions 1000mm, 3000mm and 5000mm from the spindle outlet end of each dyeing vessel, and the liquid inlet holes are connected to the pulse injector through pipes.
8. The pulse type supercritical carbon dioxide printing and dyeing apparatus according to claim 6, wherein liquid discharge holes are respectively opened at 375mm, 625mm, 875mm and 1125mm from the spindle outlet end of each dyeing vessel, and the liquid discharge holes are connected with the dye tank and the dye collecting tank through pipelines.
9. The pulsed supercritical carbon dioxide printing apparatus according to claim 8, wherein the liquid discharge hole and the liquid inlet hole are both in a large and small head structure, and both are composed of an upper hole and a lower hole.
10. The pulsed supercritical carbon dioxide printing apparatus according to claim 1, wherein the angle between the axes of the two ports in the direction of the two ports on the Y-port is 90 °.
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| CN201922284715.5U CN211394932U (en) | 2019-12-18 | 2019-12-18 | Pulse type supercritical carbon dioxide printing and dyeing device |
| PCT/CN2020/137761 WO2021121409A1 (en) | 2019-12-18 | 2020-12-18 | Pulse-type supercritical carbon dioxide printing and dyeing device |
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| CN110565415A (en) * | 2019-10-11 | 2019-12-13 | 上海复璐帝流体技术有限公司 | Supercritical carbon dioxide printing and dyeing process and printing and dyeing system thereof |
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