Dye hydrotropy device and hydrotropy method for waterless dyeing

Abstract

The invention discloses a dyestuff hydrotropy device for waterless dyeing and a hydrotropy method, and belongs to the technical field of waterless dyeing, the dyestuff hydrotropy device comprises a dyestuff bin arranged in a waterless dyeing system, the dyestuff bin is connected with an air inlet pipe, and the air inlet pipe penetrates through the dyestuff bin and conveys supercritical carbon dioxide fluid into the dyestuff bin. According to the dye dissolving assisting device and method for waterless dyeing, the flow is adjusted through different opening areas of the throttling orifice plate, so that the flow of supercritical carbon dioxide fluid for blowing dye is appropriate, and the situation that impurities are blown out due to the fact that the blowing flow of the supercritical carbon dioxide fluid to a dye tank is too large is avoided; the bottom of the dye tank is uniformly purged through the divided supercritical carbon dioxide fluid, impurities in dye can be prevented from being possibly blown out of a dye bin to pollute the surface of fabric or damage sealing surfaces of valves, pumps and the like of equipment pipelines, the service life of the dyeing equipment is prolonged, and the safety in the dyeing operation process is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of waterless dyeing, and particularly relates to a dye dissolution-aiding device and a dissolution-aiding method for waterless dyeing. Background Art

[0002] Waterless dyeing, scientifically known as supercritical fluid waterless dyeing technology, is a dyeing technology that does not use water as a dyeing medium, but uses an organic solvent (such as supercritical carbon dioxide) to replace water. Its basic principle is to heat and pressurize carbon dioxide to a supercritical fluid state that is neither a gas nor a liquid. Carbon dioxide in this state has both the solubility of a liquid and the diffusion capacity of a gas. Therefore, during the dyeing process, the supercritical carbon dioxide fluid is continuously circulated between the dye bin and the dyeing tank, so that the dye can quickly and evenly penetrate into the interior of the textile to complete the dissolution, adsorption and dyeing process of the dye. It has been widely used in the textile industry, especially in the development of dyeing processes for synthetic fibers, natural fibers and multi-component fibers. Remarkable results have been achieved.

[0003] A dye bin is generally provided in the waterless dyeing system for placing dyes. When dyeing, supercritical carbon dioxide is first passed through the dye bin to dissolve the dye, and then the supercritical carbon dioxide fluid with dissolved dyes is sent into the dyeing kettle to dye the fabric. During the dyeing process, due to the inconsistent dissolution temperatures of different types of dyes, mixed dyes will cause the first dissolved dye to crystallize and form a film on the surface of the later dissolved dye to block its dissolution, resulting in dyeing color difference. When the same type of dyes are piled, if the purge force is not enough, the first dissolved dye will also crystallize and form a film on the surface of the dye pile to block its subsequent dissolution, resulting in insufficient dye dissolution, affecting the solubility and dyeing effect of the dye. When the air flow is too large, impurities in the dye may be blown out of the dye bin, contaminating the fabric surface, or damaging the sealing surface of the valves, pumps, etc. of the equipment pipeline. In view of this, a dye dissolution aid device and dissolution aid method for waterless dyeing are proposed for improvement. Summary of the invention

[0004] The purpose of the present invention is to provide a dye dissolution aid device and a dissolution aid method for waterless dyeing, aiming to solve the above-mentioned problems existing in the prior art.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A dye dissolution aid device for waterless dyeing comprises a dye bin arranged in a waterless dyeing system, wherein the dye bin is connected with an air inlet pipe which penetrates the dye bin and conveys supercritical carbon dioxide fluid into the dye bin.

[0006] A dye tank is arranged in the dye bin, and the dye tank is fixed in the dye bin and can be detached and taken out.

[0007] In a preferred embodiment of the present invention, the air inlet pipe extends into the dye bin, and a diversion hole is penetrated through the side wall of the extending section.

[0008] In a preferred embodiment of the present invention, a throttle orifice plate is provided in the air intake pipe, and the throttle orifice plate is located at the downstream side of the diverter hole.

[0009] In a preferred embodiment of the present invention, the throttling orifice plate is detachable, and there are multiple throttling orifice plates, different throttling orifice plates have different opening areas, and the diversion flow rate of the supercritical carbon dioxide fluid is adjusted by the different opening areas.

[0010] In a preferred embodiment of the present invention, the bottom of the dye tank relative to gravity faces the flow direction of a portion of the fluid diverted by the throttling orifice plate.

[0011] In a preferred embodiment of the present invention, a plurality of dye tanks are arranged in a ring shape, and can be stacked vertically to form multiple layers with the layers being staggered.

[0012] In a preferred embodiment of the present invention, a dissolution hole is formed through the outer wall of the dye tank, and the outer side of the dye tank is wrapped with a filter cloth and fastened with a clamp.

[0013] In a preferred embodiment of the present invention, the tank body of the dye tank is made of stainless steel sintered metal.

[0014] On this basis, the present invention also provides a dye dissolution aid device and a dissolution aid method for waterless dyeing, which are implemented using the above-mentioned dye dissolution aid device for waterless dyeing, and include the following steps: S1: When dyeing a single color, the dye is evenly packed in multiple dye tanks; when dyeing a combination of colors, different dyes are packed in different dye tanks; when there are many dyes, the throttling orifice plate is selected to make the flow rate through the dye tank larger and the number of dye tanks can be increased; when there are few dyes, the throttling orifice plate is selected to make the flow rate through the dye tank smaller; S2: The throttling orifice plate divides the supercritical carbon dioxide fluid entering the dye bin into two parts. One part enters the dye bin through the throttling orifice plate and the rear section of the air inlet pipe, and the other part enters the dye bin through the diversion hole. The diversion volume on both sides is adjusted by the opening area of ​​the throttling orifice plate. The supercritical carbon dioxide fluid entering the dye bin through the diversion hole first blows the bottom of the dye tank, so that the dye at the bottom of the dye tank is dissolved first, or is driven by the airflow to roll in the dye tank to complete the dissolution of the dye.

[0015] In general, compared with the prior art, the above technical solution conceived by the present invention has the following beneficial effects: The dye dissolution-aiding device and dissolution-aiding method for waterless dyeing of the present invention make the dye stacking more uniform by packaging the dye in different dye tanks, and dyes of different colors can be placed in different dye tanks, thereby reducing the mutual influence, and increasing the airflow contact area by packaging, which is helpful for dye dissolution; and adjusting the flow size by different opening areas of the throttling orifice plate, so that the flow rate of the supercritical carbon dioxide fluid for purging the dye is appropriate, thereby avoiding the situation that the purge flow rate of the supercritical carbon dioxide fluid to the dye tank is too large, resulting in impurities being blown out and the filter cloth being blown away, or the flow rate is too small and the dye is not fully dissolved; and it is not necessary for all fluids to pass through the filter tank, The flow resistance is reduced, which is beneficial to reducing the load of the pump, so that more flow pressure difference acts on the through-dyed fabric, making the dyeing more uniform; the bottom of the dye tank is evenly purged by the diverted supercritical carbon dioxide fluid, which is convenient for the uniform dissolution of the dye, and the dye in the dye tank continues to sink under the action of gravity to continue to dissolve, thereby avoiding the risk of the dye on the upper side of the dye tank being dissolved and crystallizing on the surface of the dye pile to form a film to block subsequent dissolution, improving the solubility of the dye and the dyeing effect, and preventing impurities in the dye from being blown out of the dye bin and contaminating the fabric surface, or damaging the sealing surfaces of valves, pumps, etc. in the equipment pipeline, thereby improving the service life of the dyeing equipment and the safety during the dyeing operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a schematic diagram of the side cross-sectional structure of the present invention; Figure 3 It is a schematic diagram of the cross-sectional structure of the present invention in a top view.

[0017] In all the drawings, the same reference numerals represent the same technical features, specifically: 1. dye bin; 2. air intake pipe; 3. dye tank; 4. diverter hole; 5. throttling orifice plate. DETAILED DESCRIPTION

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be briefly introduced below in combination with the drawings and the description of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention.

[0019] Example: like Figure 1-3As shown, this embodiment provides a dye dissolution-aiding device and dissolution-aiding method for waterless dyeing, including a dye tank 1 arranged in a waterless dyeing system, the dye tank 1 is connected to an air inlet pipe 2, the air inlet pipe 2 passes through the dye tank 1 and transports supercritical carbon dioxide fluid into the dye tank 1.

[0020] A dye tank 3 is arranged in the dye bin 1 , and the dye tank 3 is fixed in the dye bin 1 and can be removed and taken out.

[0021] In a specific application scenario, by packaging the dye in different dye tanks 3, the dye is stacked more evenly, and dyes of different colors can be placed in different dye tanks 3, reducing the mutual influence, and increasing the larger airflow contact area by packaging, which is conducive to dye dissolution; and adjusting the flow rate by different opening areas of the throttling orifice plate 5, so that the supercritical carbon dioxide fluid flow rate of the dye is appropriate, thereby avoiding the situation where the supercritical carbon dioxide fluid purges the dye tank 3 too much and impurities are blown out, or the flow rate is too small and the dye is not fully dissolved; the bottom of the dye tank 3 is evenly purged by the shunted supercritical carbon dioxide fluid, which is convenient for the uniform dissolution of the dye, and the dye in the dye tank 3 continues to sink under the action of gravity to continue to dissolve, thereby avoiding the risk of the dye on the upper side of the dye tank 3 dissolving and crystallizing on the surface of the dye pile to form a film to block subsequent dissolution. The following is a further description of the dye dissolution aid device and dissolution aid method for anhydrous dyeing of the present invention in conjunction with this application scenario.

[0022] Further, refer to Figure 1-3 The air inlet pipe 2 extends into the dye bin 1, and a diversion hole 4 is provided through the side wall of the extending section.

[0023] In this embodiment, in order to divert the supercritical carbon dioxide fluid, a diversion hole 4 is opened through the side wall of the extension section of the air inlet pipe 2 extending into the dye tank 1, so that after the supercritical carbon dioxide fluid enters the air inlet pipe 2, it will also be diverted through the diversion hole 4, so that the supercritical carbon dioxide fluid is diverted from the air inlet pipe 2 to blow on the bottom of the dye tank 3, which helps to dissolve the dye in the dye tank 3.

[0024] For more details, see Figure 1-3 A throttle orifice plate 5 is arranged in the intake pipe 2 , and the throttle orifice plate 5 is located on the downstream side of the diversion hole 4 .

[0025] In this embodiment, although the supercritical carbon dioxide fluid will be diverted through the diversion hole 4 after entering the intake pipe 2, the diversion flow rate is not controllable, resulting in uneven blowing effect of the supercritical carbon dioxide fluid on the bottom of the dye tank 3 after diversion, which will cause the risk of too small or too large blowing effect, thereby affecting the dissolution effect of the dye in the dye tank 3; in order to control the flow of the supercritical carbon dioxide fluid, a throttling orifice 5 is set on the downstream side of the diversion hole 4, so that the supercritical carbon dioxide fluid in the intake pipe 2 is limited by the throttling orifice 5 to improve the diversion effect.

[0026] More preferably, referring to Figure 1-3 The throttling orifice plate 5 is detachable, and there are multiple throttling orifice plates 5. Different throttling orifice plates 5 have different opening areas, and the diversion flow rate of the supercritical carbon dioxide fluid is adjusted through different opening areas.

[0027] In the present embodiment, in order to make the flow control of the supercritical carbon dioxide fluid through the intake pipe 2 and the diverter hole 4 more accurate, the throttling orifice plate 5 is detachable and has multiple parts, so that the throttling orifice plate 5 has different opening areas. Since the opening area of ​​the throttling orifice plate 5 changes, the flow rate of the supercritical carbon dioxide fluid that can pass through the opening part of the throttling orifice plate 5 in the intake pipe 2 will also change accordingly. The supercritical carbon dioxide fluid passing through the intake pipe 2 has a fixed flow rate. If more supercritical carbon dioxide fluid passes through the opening part of the throttling orifice plate 5, then less supercritical carbon dioxide fluid will inevitably pass through the diverter hole 4. This balances the flow rate of the supercritical carbon dioxide fluid, thereby improving the accuracy of the flow control of the supercritical carbon dioxide fluid.

[0028] More preferably, referring to Figure 1-3 , the bottom of the dye tank 3 relative to gravity is directed toward a portion of the fluid diverted by the throttling orifice plate 5.

[0029] In this embodiment, after the supercritical carbon dioxide fluid flows out from the diversion hole 4 into the dye bin 1, it flows from the outside of the dye tank 3 to be purged from bottom to top. In order to improve the dissolution effect of the purging, the bottom of the dye tank 3 relative to gravity is arranged to face the direction of a portion of the fluid diverted by the throttling orifice plate 5, so that the dye in the dye tank 3 will sink to the bottom under the action of gravity, and the dye at the bottom will first be dissolved by the purging of the supercritical carbon dioxide fluid. After the bottom dye is dissolved, the dye on the upper side continues to sink under the action of gravity and continues to be dissolved, thereby avoiding the risk of the upper side dye dissolving on the surface of the dye pile and crystallizing into a film to block subsequent dissolution, so that the dye can be dissolved more fully, and the solubility and dyeing effect of the dye can be improved.

[0030] Furthermore, refer to Figure 1-3 A plurality of dye tanks 3 are arranged in a ring shape, and can be stacked vertically to form multiple layers with the layers being staggered.

[0031] In this embodiment, in order to improve the dissolution effect and dissolution quantity of the dissolution-aiding device, the dye tanks 3 are arranged to form multiple layers by vertical stacking, so that more dye tanks 3 can be assembled and stacked. In order to avoid the stacked dye tanks 3 causing the purging of the supercritical carbon dioxide fluid to be blocked, the dye tanks 3 are staggered, thereby increasing the assembly quantity of the dye tanks 3 while maintaining the purging effect of the supercritical carbon dioxide fluid.

[0032] Furthermore, refer to Figure 1-3 The outer wall of the dye tank 3 is penetrated with a dissolution hole, and the outer side of the dye tank 3 is wrapped with a filter cloth and fastened with a clamp.

[0033] In this embodiment, during the waterless dyeing process, in order to facilitate the mixing of the dissolved dye with the supercritical carbon dioxide fluid and the continuous circulation between the dye bin 1 and the dye tank 3, so that the dye can quickly and evenly penetrate into the interior of the textile to complete the dye dissolution, adsorption and dyeing process, a dissolution hole is opened through the outer wall of the dye tank 3 to facilitate the outflow of the dissolved dye, and the filter cloth wrapped outside the dye tank 3 is used for filtering.

[0034] More specifically, see Figure 1-3 , the tank body of the dye tank 3 is made of stainless steel sintered metal.

[0035] In this embodiment, stainless steel sintered metal is a porous material formed by sintering stainless steel metal powder at high temperature. During the sintering process, the gaps between the metal powder particles are filled and connected to form a solid skeleton with a continuous pore structure. This pore structure not only has a high specific surface area and porosity, but also provides a filtration channel, which can effectively intercept and filter, so that the tank body of the dye tank 3 can be used as a filter medium to replace the filter cloth to filter the dissolved dye. At the same time, the pore structure of the sintered metal can be adjusted as needed to meet the requirements of different filtration accuracy and filtration speed. The sintered metal also has good corrosion resistance, high temperature resistance and mechanical strength, so that the tank body of the dye tank 3 can maintain stable filtration performance.

[0036] Working principle: The dye dissolution-aiding device and dissolution-aiding method for waterless dyeing of the present invention, in the process of waterless dyeing, in order to improve the dissolution effect of the dye, firstly, the dye is divided into different dye tanks 3, so that the dye is piled more evenly, and dyes of different colors can be placed in different dye tanks 3, which reduces the mutual influence, and increases a larger airflow contact area through the division, which is helpful for dye dissolution, and then the supercritical carbon dioxide fluid is transported from the air inlet pipe 2 for purging and dissolution-aiding; When the supercritical carbon dioxide fluid enters the air intake pipe 2 and passes through the suddenly reduced opening position of the throttling orifice plate 5, a part of it passes through the throttling orifice plate 5, while the other part is blocked by the non-opening part of the throttling orifice plate 5 and turns to flow into the dye bin 1 from the diverter hole 4 on the air intake pipe 2, and the dye tank 3 is purged from bottom to top. At this time, in order to control the purging flow rate of the supercritical carbon dioxide fluid to the dye tank 3, the throttling orifice plate 5 is provided with different opening areas through disassembly and replacement, and then the flow rate passing through the opening position of the throttling orifice plate 5 and the flow rate flowing out from the diverter hole 4 are adjusted, so that the air flow rate of the purging dye is appropriate, and it is avoided that the purging flow rate of the supercritical carbon dioxide fluid to the dye tank 3 is too large, which may cause impurities to be blown out, the metal filter cloth to be blown damaged, or the flow rate is too small and the dye is not fully dissolved; The supercritical carbon dioxide fluid flows out from the diversion hole 4 into the dye bin 1 and then flows through the outside of the dye tank 3 to be purged from bottom to top. In order to improve the dissolution effect of the purging, the bottom of the dye tank 3 relative to gravity is arranged to face the direction of a portion of the fluid diverted by the throttling orifice plate 5, so that the dye in the dye tank 3 will sink to the bottom under the action of gravity, and the dye at the bottom will first be dissolved by the purging of the supercritical carbon dioxide fluid. After the bottom dye is dissolved, the dye on the upper side continues to sink under the action of gravity and continues to be dissolved, thereby avoiding the risk of the upper side dye dissolving on the surface of the dye pile and crystallizing into a film to block subsequent dissolution, making the dye dissolve more fully and improving the solubility and dyeing effect of the dye.

[0037] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A dye dissolution aid device for waterless dyeing, comprising a dye bin (1) arranged in a waterless dyeing system, wherein the dye bin (1) is connected to an air inlet pipe (2), characterized in that : The air inlet pipe (2) passes through the dye chamber (1) and conveys supercritical carbon dioxide fluid into the dye chamber (1); A dye tank (3) is arranged in the dye bin (1); the dye tank (3) is fixed in the dye bin (1) and can be removed and taken out.

2. The dye dissolution aid device for anhydrous dyeing according to claim 1, characterized in that: The air inlet pipe (2) extends into the dye bin (1), and a diversion hole (4) is provided through the side wall of the extending section.

3. The dye dissolution aid device for anhydrous dyeing according to claim 2, characterized in that: A throttling orifice plate (5) is arranged in the air intake pipe (2), and the throttling orifice plate (5) is located on the downstream side of the diverter hole (4).

4. The dye dissolution aid device for anhydrous dyeing according to claim 3, characterized in that: The throttling orifice plate (5) is detachable, and there are a plurality of throttling orifice plates (5), and different throttling orifice plates (5) have different opening areas, and the diversion flow rate of the supercritical carbon dioxide fluid is adjusted through the different opening areas.

5. The dye dissolution aid device for anhydrous dyeing according to claim 3, characterized in that: The bottom of the dye tank (3) relative to gravity is directed toward a flow direction of a portion of the fluid diverted by the throttling orifice plate (5).

6. The dye dissolution aid device for anhydrous dyeing according to claim 1, characterized in that: The dye tanks (3) are arranged in a ring shape in plurality, and can be stacked vertically to form multiple layers with the layers arranged in a staggered manner.

7. The dye dissolution aid device for anhydrous dyeing according to claim 1, characterized in that: A dissolution hole is provided through the outer wall of the dye tank (3), and the outer side of the dye tank (3) is wrapped with a filter cloth and fastened with a clamp.

8. The dye dissolution aid device for anhydrous dyeing according to claim 1, characterized in that: The tank body of the dye tank (3) is made of stainless steel sintered metal.

9. A method for dissolving dyes for waterless dyeing, which is implemented by using the device for dissolving dyes for waterless dyeing according to any one of claims 1 to 8, comprising the following steps: S1: when dyeing a single color, the dye is evenly packed into a plurality of dye tanks (3); when dyeing a combination of colors, different dyes are packed into different dye tanks (3); when there are a large number of dyes, the throttling orifice plate (5) is selected to increase the flow rate through the dye tank (3), and the number of dye tanks (3) can be increased; when there are a small number of dyes, the throttling orifice plate (5) is selected to reduce the flow rate through the dye tank (3); S2: The throttling orifice (5) divides the supercritical carbon dioxide fluid entering the dye tank (1) into two parts, one part enters the dye tank through the throttling orifice (5) and the rear section of the air inlet pipe (2), and the other part enters the dye tank (1) through the diversion hole (4), and the diversion amount on both sides is adjusted by the opening area of ​​the throttling orifice (5); through the diversion, a part of the supercritical carbon dioxide fluid is blown to the bottom of the dye tank (3) first, so that the dye at the bottom of the dye tank (3) is dissolved first, or is driven by the airflow to roll in the dye tank (3), thereby completing the dissolution of the dye.

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