33results about "Textile solvent-dyeing" patented technology

The invention belongs to the field of textile dyeing and finishing, and particularly relates to a functional hollow covering yarn and a preparation method and application thereof. The method comprises the following steps: pretreating textile fibers; preparing a functional additive solution; finishing the auxiliary agent and the fibers by adopting a supercritical CO2 process to obtain functional fibers; twisting the functional fibers and the water-soluble fibers into covering yarns; and dissolving the water-soluble fiber to obtain the functional hollow core-spun yarn. The problems that a traditional technology is single in function, poor in environmental protection performance and unstable in structure are solved, and the product has excellent physical performance (breathability, quick drying, fluffiness and the like) and multiple sanitary functions and is suitable for the field of functional fabric.

The utility model provides a waterless dyeing device which comprises a base, wherein a transmission unit is arranged on the base; the dyeing tank is arranged on the base, a cover plate is rotationally arranged at one end of the dyeing tank, a first rotating rod matched with the transmission unit is arranged at the other end of the dyeing tank, and a driving part is arranged on the first rotating rod; and the dyeing frame is arranged in the dyeing tank. According to the waterless dyeing device, the textile parts are placed on the dyeing frame one by one, then the dyeing frame is placed in the dyeing tank, in the dyeing process, gas dye can be sprayed out to the textile parts along the dyeing holes in the supporting rod, meanwhile, the transmission unit can enable the driving part to rotate, the linkage disc is controlled to rotate through the rotary disc, and therefore the textile parts can be dyed. In other words, the spinning part on the second rotating rod is controlled to rotate, so that the spinning part can be in contact with the dye flowing out of the dyeing holes in multiple directions, and the dyeing effect of the gas dye is improved.

The invention relates to the technical field of textile fabrics, in particular to a comfortable wool blended fabric and a preparation method thereof. The comfortable wool blended fabric comprises the following fiber components in percentage by mass: 25%-45% of merino wool, 20%-35% of lyocell fibers, 10%-25% of bio-based polyamide 56 fibers, 5%-15% of recycled polyester fibers and 3%-8% of spandex. Due to the combination, the softness, the air permeability, the elasticity and the close-fitting comfort of the final fabric are well balanced, and the scratchiness of the pure wool fabric is remarkably reduced. Besides, a large amount of bio-based and regenerated fibers are used in the formula, so that the dependence on non-renewable petroleum resources is reduced, and the concept of low carbon and environmental protection is embodied. Finally, through double innovation of component design and process design, the wool blended fabric which is extremely comfortable, excellent in functionality and environmentally friendly is successfully prepared.

The invention discloses a supercritical waterless dyeing kettle, a dyeing system and a dyeing method.The dyeing kettle at least comprises a dyeing kettle body, the dyeing kettle body comprises a closed end and an open end, and a dyeing cavity is formed in the dyeing kettle body; the kettle cover is fixedly connected with the open end of the dyeing kettle body and closes the open end; the heating and cooling jacket device is fixed outside the dyeing kettle body in a sleeving manner, the heating and cooling jacket device is of a hollow structure, and a medium with a heating or cooling function is introduced into the heating and cooling jacket device; the dyeing warp beam is arranged in the middle of a dyeing cavity of the dyeing kettle body, the dyeing warp beam is a hollow pipe body, and a plurality of fluid permeation holes are formed in the pipe wall of the dyeing warp beam; wherein a spiral flow guide structure is further arranged in the heating and cooling jacket device, and the spiral flow guide structure is arranged along the outer wall of the dyeing kettle body. The method is suitable for implementing efficient and uniform waterless dyeing treatment on the textile by using the supercritical carbon dioxide medium.

The invention relates to the technical field of cashmere blend fiber fabrics, in particular to a preparation method of a cashmere blend fiber fabric. The cashmere blend fiber fabric is prepared from the following raw materials in parts by weight: 50 to 60 parts of cashmere fiber, 3 to 5 parts of polybutylene adipate elastic fiber, 5 to 8 parts of bacterial cellulose nanofiber, 17 to 22 parts of PNIPAM grafted modified polyester, 6 to 10 parts of polydopamine coated basalt short fiber, 8 to 12 parts of bamboo pulp fiber and 0.8 to 1.5 parts of cross-linking agent. In the manufacturing process of the cashmere blend fiber fabric, the breaking strength of the fabric is improved, meanwhile, the core touch feeling of cashmere is kept, a temperature triggering-humidity cooperation intelligent humidity adjusting system is formed, functional adjustment of the cashmere fabric is improved, the unification of the elastic-soft-durable performance is achieved in the technology, and the production cost is reduced. In-fiber in-situ fixation of the antibacterial agent is achieved, the problem that a traditional after-finishing functional agent is prone to falling off is solved, zero discharge of waste water is achieved, and good environmental protection significance is achieved.

The supercritical CO2 dyeing recovery and separation system comprises a separation kettle, a temperature drop circulation assembly and a central controller, the separation kettle is provided with a movable cylinder and a positioning cylinder which can be driven by a lifting mechanism to be close to or away from each other, and a filter membrane capable of separating a cylinder channel is arranged between the movable cylinder and the positioning cylinder; the filtering membrane is wound and unwound by a winding and unwinding device so as to replace a filtering section arranged in a barrel channel, the barrel channel is used for feeding and discharging through a feeding connecting pipe and a discharging connecting pipe which extend out of the shell respectively, and the temperature in the shell is regulated and controlled by a temperature reduction circulating assembly; the central controller is electrically connected with the separation kettle and the temperature drop circulation assembly, automatic section changing of the filtering membrane can be achieved through the winding and unwinding device, and only low-frequency membrane cylinder changing is needed manually, so that maintenance cost and production interruption can be reduced on the basis that CO2 recovery purity is guaranteed.

The present application relates to the field of dyeing equipment, disclose a kind of supercritical carbon dioxide anhydrous dyeing horn steady flow device and application, including being located between the air inlet pipe and yarn cylinder horn steady flow main body;The horn steady flow main body includes horn front section, horn main section and horn end section, the air inlet pipe is connected with horn front section, yarn cylinder is connected with horn end section;The horn main section is the expanding diameter structure gradually increasing from input end to output end, and the inner wall of horn main section is evenly distributed with several pieces of axial guide rib along the circumferential direction, and axial guide rib is streamline straight rib.The present application has the advantages that: it can effectively stabilize the internal flow field of supercritical carbon dioxide dyeing equipment, improve dyeing uniformity, improve process stability and reduce energy consumption.

A dyed textile hook-and-loop fastener obtained through supercritical CO2 dyeing of a textile hook-and-loop fastener, is dyed in a deep color, and exhibits a high rupture elongation due to having less thermal history in a dyeing step.

The invention discloses a wool fabric waterless dyeing device and a dyeing method thereof in the technical field of fabric processing, the wool fabric waterless dyeing device comprises a reaction kettle main body, a support is arranged on the reaction kettle main body, a hoisting piece, a plurality of outer dyeing columns and a plurality of inner dyeing columns are arranged on the support, and the outer dyeing columns and the inner dyeing columns are arranged on the hoisting piece. The inner dyeing columns are located on the inner sides of the outer dyeing columns, and second through holes used for being communicated with the inner dyeing columns and first through holes used for being communicated with the outer dyeing columns are formed in the support; a fixing piece for fixing the outer dyeing column is arranged on the bracket; the outer dyeing column can move in the axial direction (such as downward) by relieving the fixed limitation on the outer dyeing column, so that the operation space for the inner dyeing column is directly reserved, an operator can directly and conveniently get close to the inner dyeing column without shuttling back and forth in a narrow fixed column gap with great effort or detaching the outer dyeing column in advance, and the operation efficiency is greatly improved. The wool fabric is loaded or unloaded, so that the manual working efficiency is improved.

The present application relates to the field of ecological and environmentally friendly waterless dyeing, and particularly relates to a horizontal supercritical waterless dyeing color sample system and application thereof. The system comprises a carbon dioxide gas supply assembly, a dyeing circulation assembly and a plurality of dyeing kettles. The carbon dioxide gas supply assembly is connected to the dyeing kettles to provide carbon dioxide gas for the dyeing kettles. The dyeing circulation assembly is in communication with the dyeing kettles to form a dyeing circulation loop. The system further comprises a dyeing support which is detachably connected to the dyeing kettles. The dyeing support comprises dyeing pipelines and dye storage pipelines which are in communication with each other. The dyeing pipelines are used to support the winding of the textile to be dyed. The dye storage pipelines are used to store the dye. The end of the dye storage pipeline which is away from the dyeing pipeline can be inserted into the dyeing circulation assembly to form a part of the dyeing circulation assembly. The present application can determine the dye formula and process parameters required by the production equipment, thereby obtaining the color required by mass production.

The application relates to the technical field of textile printing and dyeing, and discloses a waterless printing and dyeing process intelligent control method and system.The method comprises the following steps: collecting dye dispersion and fabric fiber density data in a waterless medium, and generating an initial concentration distribution map; inputting a convolutional neural network to identify concentration instability regions and local deviation values; if the deviation exceeds a preset threshold, iteratively optimizing dye injection parameters to obtain an optimized concentration distribution map; segmenting the regions and extracting dye penetration path vectors of high fiber density regions; determining regional adsorption adjustment coefficients through a support vector machine; updating the parameters to obtain a dynamic concentration regulation sequence; iteratively optimizing the final uniform coloring distribution through coloring simulation; and extracting quality indicators to optimize process parameters and determine a production compatibility scheme.The application solves the problem of uneven dye dispersion through multi-dimensional data fusion and intelligent algorithm regulation, and improves coloring uniformity, process stability and production compatibility.

The invention discloses a gas dyeing method for whole-process commercial production, which belongs to the technical field of waterless dyeing, and comprises the steps of small-scale sample making, process pilot-scale test and commercial gas dyeing, in the small-scale sample making, test dyeing is performed in small-scale equipment, and dyeability and dyeing process conditions of to-be-dyed cloth are pre-selected and determined; the process pilot plant test comprises the following steps: performing trial dyeing in pilot plant test equipment, verifying and adjusting pre-selected process conditions; commercial gas dyeing is amplified by combining process conditions of a small-scale test and a pilot-scale test, and is carried out in mass production equipment; according to the method, on the basis of industrialization of the supercritical CO2 fluid gas dyeing process, various factors influencing the market for commodity requirements are fully considered, through perfect system configuration, selection and screening of pigment color matching schemes are included, amplification of the process scale is subjected to a progressive step-by-step amplification process from small-scale test and pilot-scale test to industrialization, and the process quality is greatly improved. The industrialization of the supercritical CO2 fluid gas dyeing process is really realized.

A method and an integrated system for dyeing synthetic, natural, and blended textiles in the form of fabrics, yarns, and garments are provided. The integrated system includes a first pressurizing pump for pressurizing liquefied CO2 to supercritical CO2 (Sc-CO2); a second pressurizing pump for pressurizing CO2 to liquefied CO2; a liquefied CO2 storage vessel for storing the liquefied CO2 and the separated liquefied CO2 from the one or more cyclone separators; a heater for heating the Sc-CO2; a dyestuff vessel for mixing a dyestuff and the Sc-CO2 to obtain Sc-CO2-mixed dyestuff; a dyeing vessel for dyeing the textile by circulating the Sc-CO2 and the Sc-CO2-mixed dyestuff between the dyeing vessel and the dyestuff vessel; and one or more cyclone separators for removing the dyestuff from the Sc-CO2-mixed dyestuff to obtain separated liquefied CO2.

The invention provides a heat setting system taking heat energy generated by reaction of printing and dyeing wastewater as a heat source, and relates to the technical field of energy conservation and environmental protection. The system comprises a setting machine, a waste heat recovery and waste gas purification system, a wastewater concentration system and a supercritical water oxidation system, the setting machine is connected with a circulating water path, and the circulating water path is connected with the supercritical water oxidation system; the circulating water path is used for absorbing reaction heat generated in the reaction space and heat of reaction products through circulating water and conveying the circulating water absorbing the heat to the setting machine. Efficient treatment of printing and dyeing wastewater is achieved through supercritical water oxidation, meanwhile, waste liquid reaction heat and waste heat of reaction products serve as heat sources of the setting machine, and the advantages of being efficient and saving energy are achieved.

The invention provides a dye dissolving system, a dyeing system and a dyeing method, and relates to the technical field of fabric dyeing. The dyeing system comprises a dyeing kettle and a dye dissolving system, the dye dissolving system comprises a dye kettle, a partition plate, a dye layer and a separator are sequentially arranged in the dye kettle, the dye kettle is further provided with a medium inlet and a medium outlet, the partition plate, the dye layer and the separator are arranged between the medium inlet and the medium outlet, and the medium inlet is close to the partition plate. The medium outlet is arranged close to the separator; the external circulation pipeline is connected to the medium inlet and the medium outlet of the dye kettle, the external circulation pipeline comprises a flow direction keeping mechanism, and the flow direction keeping mechanism is configured to respond to the change of the flow direction of the medium in the external circulation pipeline, so that the medium entering the dye kettle always enters from the medium inlet and flows out from the medium outlet. The dyeing method comprises the step of alternately carrying out positive circulation dyeing and reverse circulation dyeing. According to the invention, the dye dissolution consistency in the positive and negative circulation process can be realized, and the dyeing uniformity is improved.

The invention provides a supercritical carbon dioxide dyeing system which is characterized by comprising a high-pressure dyeing kettle, a heat exchanger, a carbon dioxide high-pressure pump, a carbon dioxide storage tank and a separation kettle, an outlet of the carbon dioxide storage tank is sequentially connected with the carbon dioxide high-pressure pump and the heat exchanger and then is connected to an inlet of the high-pressure dyeing kettle; the outlet of the separation kettle is connected with a heat exchanger and then is connected to the inlet of the carbon dioxide storage tank; and a regulating valve is arranged between the outlet of the high-pressure dyeing kettle and the inlet of the separation kettle. The supercritical carbon dioxide circulating pump and the dye loading cabin are arranged in the dyeing kettle, so that the carbon dioxide circulating path and the pressure drop loss are greatly shortened, the mass transfer effect and the efficient dissolution of the dye are improved, the dyeing uniformity and the dyeing efficiency are improved, and the investment and operation cost is reduced. The method is low in cost and easy to industrially amplify. A brand new solution is provided for high-efficiency and low-cost dyeing of textiles.

The invention discloses a differential modification and water-saving dyeing and finishing method for fiber materials of imitated composite fabrics, and relates to the technical field of dyeing and finishing and washing treatment of textile materials, and the method comprises the following steps: obtaining fiber component information and target style information of to-be-treated imitated composite fabrics; performing gas-phase dyeing on the to-be-treated imitated composite fabric; the dyed imitation composite fabric is treated through mechanical friction and steam activation; and performing low liquor ratio cleaning on the fabric subjected to the vintage treatment, and performing setting treatment. According to the method, the fiber composition of the imitated composite fabric is obtained through identification, the process parameters are subjected to differentiation and self-adaptive adjustment so as to be matched with the physicochemical characteristics of different fiber components, the authenticity and consistency of the vintage effect of the composite jean fabric are ensured from the two dimensions of dyeing selectivity and vintage selectivity, and the quality of the composite jean fabric is improved. The problems of splitting, high water consumption and unnatural and uncontrollable distressing effect in the traditional process are solved.

The invention relates to the technical field of dyeing, in particular to a dyeing system and a using method, and the dyeing system comprises a dyeing kettle, a dye box and a material supporting piece. The dye box is arranged in the dyeing kettle and comprises a box body, a dye supporting pipe and a dye layer, an inflow port of the dye supporting pipe is communicated with an input port of the dyeing kettle, the dye supporting pipe is partially inserted into the box body and provided with a ventilation section, and a first blocking end of the dye supporting pipe and the ventilation section are both located in the box body. A plurality of ventilation holes are uniformly formed in the side wall of the ventilation section, the dye layer is wound on the ventilation section, the dye layer comprises a porous loading layer and dye uniformly arranged on the porous loading layer, the box body comprises an outflow opening, and the outflow opening is communicated with a gathering space between the box body and the ventilation section. The material supporting piece is arranged in the dyeing kettle and used for supporting materials. The dyeing medium sequentially flows through the input port, the inflow port, the vent hole, the dye layer, the gathering space, the outflow port, the material and the output port.

A method for improving a solubility and a dissolution rate of dyestuffs in supercritical carbon dioxide fluid is provided, by first increasing the temperature to a target temperature above the melting point of the dyestuff to melt the dyestuff, and then mixing the supercritical carbon dioxide fluid in flow with the molten dyestuff at a certain mass ratio, afterwards, lowering the supercritical carbon dioxide fluid with the dyestuff dissolved to the initial temperature, repeating mixing and cooling processes in a cycle and maintaining for a certain time, and all temperature conditions remaining the same as before during the cycle repetition; wherein the dyestuff is a dye and / or a functional auxiliary; the initial temperature is lower than the target temperature; the pressure of the supercritical carbon dioxide fluid remains consistent. The invention improves the solubility and dissolution rate of dyestuffs in supercritical carbon dioxide, without adding other cosolvents, will not cause harm to the human body, and does not need to consider the separation and removal of cosolvents.

To recover a dye from textile waste containing at least 50 mass% of polyester fibers by a safe, easy and environmentally clean means.SOLUTION: A textile waste batch is extracted with a circulating solvent in an extraction chamber, the solution comprising the solvent and the extracted material is used as a dye extraction solvent from another textile waste batch, and the extraction process is repeated until the amount of extracted material in the solution reaches a concentration that impairs further dye extraction.SELECTED DRAWING: Figure 1

The invention relates to a flow uniform distributor for a liquid storage tank of a supercritical carbon dioxide dyeing kettle, which is arranged in the liquid storage tank and comprises a three-stage asymmetric bifurcated network structure, the three-stage asymmetric bifurcated network structure comprises a main inlet pipe, a first-stage pipe, a second-stage pipe and third-stage pipes which are communicated in sequence, and the number, the aperture and the position of the third-stage pipes are matched with those of yarn columns; the number ratio of the main inlet pipe to the first-stage pipe to the second-stage pipe to the third-stage pipe is 1: 3: 6: 18; the main inlet pipe, the first-stage pipe, the second-stage pipe and the third-stage pipe form a fluid flow channel; the turning section of the diode adopts a double-curvature continuous bent pipe design of bending forwards and then bending backwards; the inner diameters of the first-stage tube, the second-stage tube and the third-stage tube are gradually reduced according to a constant-speed principle; and the main inlet pipe, the first-stage pipe, the second-stage pipe and the third-stage pipe can bear static load pressure of 229 MPa. Compared with the prior art, the system pressure loss is reduced; the structure is compact and dismounting is convenient; the long-term high-voltage safe operation is met; and the manufacturing and maintenance cost is low.

The invention relates to the field of synthetic fibers, and discloses a high-fastness easy-to-dye fiber, a fabric preparation method and a waterless dyeing process thereof. The preparation method of the high-fastness easy-to-dye fiber comprises the following steps: introducing modified polyamide chips containing the antibacterial agent into polyester chips, and carrying out melt spinning to obtain the high-fastness easy-to-dye fiber. The fiber is good in mechanical property and good in antibacterial property, the fabric made of the fiber is high in color fastness after being dyed by adopting a supercritical carbon dioxide waterless dyeing process, meanwhile, due to the supercritical carbon dioxide waterless dyeing process, dye aggregation caused by a water medium in a traditional water bath dyeing process is avoided, and the dyeing uniformity is improved.

The invention discloses a supercritical CO2 dyeing kettle with CO2 circulation driven by a shielding motor. The supercritical CO2 dyeing kettle comprises the shielding motor, a dyeing vat and a fabric assembly. A shielding motor is adopted to drive a spiral propeller shaft blade and a main impeller, dye liquor flows from the middle of a net-shaped cylinder in a cloth roller disc to one end, meanwhile, the main impeller rotates, the dye liquor is evenly thrown to the periphery, passes through a dye box and becomes saturated dye liquor, the saturated dye liquor evenly penetrates through fabric, and dyeing is completed. Dyeing uniformity and efficiency are high, a dissolving kettle and a CO2 circulating pump in a supercritical CO2 dyeing process are omitted, internal heat exchange is adopted, and heat exchange efficiency is high. The auxiliary impeller of the labyrinth sealing shell accelerates CO2 circulation of the shielding motor shell, the motor shell is kept in a low-temperature state, and meanwhile low-temperature CO2 exchange between high-temperature dye liquor in the dye vat and an inner cavity of the shielding motor is reduced through labyrinth sealing. Due to the action of the auxiliary impeller and the labyrinth seal, CO2 in the motor shell is in a low-temperature state, and normal operation of the motor is guaranteed.

The present application relates to cashmere blended fiber fabric technical field, especially to a kind of preparation method of cashmere blended fiber fabric, the cashmere blended fiber fabric is composed of the following weight parts of raw materials: cashmere fiber 50-60 parts, polybutylene adipate elastomeric fiber 3-5 parts, bacterial cellulose nanofiber 5-8 parts, PNIPAM graft modification polyester 17-22 parts, polydopamine coated basalt staple fiber 6-10 parts, bamboo pulp fiber 8-12 parts, crosslinking agent 0.8-1.5 parts.In the process of making cashmere blended fiber fabric, the breaking strength of the fabric is improved while maintaining the core touch of cashmere, forming a "temperature trigger-humidity synergy" intelligent humidity control system, improving the functional regulation of cashmere fabric, in the process, the performance of "elasticity-softness-durability" is unified, and the in-situ fixation of antibacterial agent in the fiber is also realized, solving the problem of easy falling off of traditional after-treatment functional agent, and zero wastewater discharge, with good environmental protection significance.

The invention belongs to the technical field of cleaning, and particularly relates to a cleaning method for removing cobalt pollution on the surface of fabric, which comprises the following steps: 1) preparing an additive solution which comprises a surfactant, citric acid, EDTA and water; the molar ratio of the water to the surfactant is (15-20): 1, and the molar ratio of the citric acid to the EDTA is (5-20): 1, 2) adding the cobalt-polluted fabric and an additive solution into a supercritical carbon dioxide reaction kettle; and (3) carbon dioxide is injected, static extraction cleaning is conducted on the fabric, cobalt pollution on the surface of the fabric is removed, and during static extraction cleaning, the pressure intensity is 15-20 MPa, and the temperature is 60-70 DEG C. According to the method, the removal effect can be improved.

The utility model provides a supercritical carbon dioxide waterless dyeing circulating system, system and equipment, and relates to the technical field of dyeing. The supercritical carbon dioxide waterless dyeing equipment comprises a supercritical carbon dioxide waterless dyeing system, the supercritical carbon dioxide waterless dyeing system comprises a supercritical carbon dioxide waterless dyeing circulating system, the circulating system comprises a dyeing kettle, a circulating pump and a pipeline, the circulating pump is a vane pump, and vanes of the vane pump are arranged in the radial direction of a rotor. The pipelines comprise a first pipeline and a second pipeline, the dyeing kettle is provided with a first fluid interface and a second fluid interface, the circulating pump comprises a third fluid interface and a fourth fluid interface, the first pipeline is connected with the first fluid interface of the dyeing kettle and the third fluid interface of the circulating pump, and the second pipeline is connected with the fourth fluid interface of the circulating pump. The second pipeline is connected with the second fluid interface of the dyeing kettle and the fourth fluid interface of the circulating pump. The vane pump is adopted as a circulating pump, and a circulating system does not need to be provided with a complex pipeline.

The utility model discloses supercritical extraction and dyeing function integrated equipment which comprises a dye tank, an extractor, a separator I, a separator II, a carbon dioxide condenser, a carbon dioxide liquid tank, a carbon dioxide boost pump and a filter, one side of the dye tank is connected with the extractor through a pipeline, one side of the extractor is connected with the separator I through a pipeline, and the other side of the extractor is connected with the separator II through a pipeline. One side of the separator I is connected with a separator II through a pipeline, one side of the separator II is connected with a carbon dioxide condenser through a pipeline, one side of the carbon dioxide condenser is connected with a carbon dioxide liquid tank through a pipeline, and one side of the carbon dioxide liquid tank is connected with a carbon dioxide propulsion pump through a pipeline; one side of the carbon dioxide propulsion pump is connected with a filter through a pipeline, and the filter is connected with the dye tank through a pipeline. According to the supercritical dyeing device, plant essential oil and pigments can be extracted, textiles can be dyed, no waste water is generated during supercritical dyeing, and the supercritical dyeing device is more environment-friendly.

The invention discloses a supercritical CO2 dyeing kettle with CO2 circulation driven by a magnetic motor. The supercritical CO2 dyeing kettle comprises a dye vat, a magnetic coupling driving mechanism and a fabric assembly. A spiral propeller shaft blade and a bidirectional impeller are driven by magnetic force, dye liquor flows upwards from the middle of a net-shaped cylinder in a cloth roller disc, meanwhile, a lower impeller of the bidirectional impeller rotates, the dye liquor is evenly thrown to the periphery, passes through a dye box and becomes saturated dye liquor, the saturated dye liquor evenly penetrates through fabric, and dyeing is completed. The impeller on the two-way impeller can suck out CO2 of the spacer sleeve, the pressure of the spacer sleeve is reduced, and meanwhile mutual diffusion of CO2 of the spacer sleeve and CO2 of the dye vat is reduced. The flowing direction and speed can be controlled through rotation of the blades and the bidirectional impeller, the dyeing efficiency and the dyeing uniformity are improved, and a dissolving kettle and a CO2 circulating pump in the supercritical CO2 dyeing process are omitted. And by adopting built-in heat exchange, the heat exchange efficiency is improved, and the energy consumption is reduced.

A supercritical waterless dyeing kettle comprises a kettle body, a feed pipe, a discharge pipe, and an insulation jacket unit disposed on the kettle body, wherein the insulation jacket unit comprises a jacket disposed on the outside of the kettle body and sealedly connected to the outer wall of the kettle body, an air inlet pipe disposed on one end of the jacket body, an air outlet pipe disposed on the other end of the jacket body, a control valve disposed on the air inlet pipe, and an insulation adjustment member disposed between the inner wall of the jacket body and the outer wall of the kettle body. The present invention, through the provision of the insulation jacket unit, not only has a preheating effect on the dye, thereby improving the uniformity and stability of dyeing within the kettle body, improving dyeing efficiency, and enhancing dyeing quality, but also can flexibly switch the heating or insulation effect of the kettle body according to process requirements, effectively avoiding waste of resources and achieving the goals of energy conservation, emission reduction, and green environmental protection.

This invention provides an intelligent supercritical CO2 dyeing waste gas recovery device, comprising: a dyeing tail gas nanofilter; a first check valve connected to the outlet of the dyeing tail gas nanofilter; and a recovery carbon dioxide pump, the inlet of which is connected to the outlet of the first check valve via a pipeline for pressurizing and transporting the filtered CO2 gas. The intelligent supercritical CO2 dyeing waste gas recovery device provided by this invention utilizes the coordinated structure of the dyeing tail gas nanofilter, the first check valve, the recovery carbon dioxide pump, the condenser, the storage tank, and the low-pressure carbon dioxide pump. During operation, the recovery carbon dioxide pump can forcibly extract the low-pressure CO2 tail gas after pressure equalization, achieving residual gas recovery without additional pressurization equipment, thereby avoiding CO2 waste.