Supercritical carbon dioxide anhydrous dyeing horn-shaped flow stabilizing device and application thereof

Abstract

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.

Description

Technical Field

[0001] This invention relates to the field of dyeing equipment technology, specifically to a trumpet-shaped flow stabilizing device for supercritical carbon dioxide anhydrous dyeing and its application. Background Technology

[0002] Supercritical carbon dioxide dyeing technology, as an emerging waterless dyeing process, is considered an important alternative to traditional water-based dyeing technologies due to its advantages such as requiring no water, producing no wastewater, high dye utilization, and short dyeing time, thus possessing significant environmental and economic value. In this technology, supercritical carbon dioxide fluid serves as the medium for dye dissolution and transport, and its flow field characteristics directly determine the quality of dyeing.

[0003] Currently, most mainstream supercritical carbon dioxide dyeing equipment adopts a horizontal dyeing vessel structure. When supercritical carbon dioxide fluid enters the relatively narrow inlet pipe into the large-volume horizontal yarn tube cavity, the flow channel cross-section expands rapidly. This "diameter abrupt change" leads to drastic changes in fluid velocity and pressure distribution, which easily generates large-scale eddies and flow separation phenomena in the inlet area of ​​the horizontal yarn tube cavity. This will bring a series of problems to the actual dyeing process: 1. Uneven dyeing: Large-scale eddies can cause inconsistent dye deposition in different parts of the horizontal yarn tube cavity, resulting in color difference. 2. Increased energy consumption: Unstable flow field increases fluid transport resistance, requiring higher pumping power; 3. Poor process stability: Fluctuations in the flow field directly affect the reproducibility of the dyeing process.

[0004] In view of the above-mentioned problems, there is an urgent need to provide a device that can effectively stabilize the internal flow field of supercritical carbon dioxide dyeing equipment, thereby improving dyeing uniformity, improving process stability and reducing energy consumption. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a trumpet-shaped flow stabilizing device and its application for supercritical carbon dioxide anhydrous dyeing. This device can effectively stabilize the internal flow field of supercritical carbon dioxide dyeing equipment, improve dyeing uniformity, enhance process stability, and reduce energy consumption, thereby solving the aforementioned problems existing in existing supercritical carbon dioxide dyeing equipment during actual dyeing.

[0006] To achieve the above objectives, the present invention provides the following technical solution: In a first aspect, a trumpet-shaped flow stabilizing device for supercritical carbon dioxide anhydrous dyeing includes a trumpet-shaped flow stabilizing body disposed between an air inlet pipe and a yarn bobbin; the trumpet-shaped flow stabilizing body includes a front section of the trumpet, a main section of the trumpet, and a rear section of the trumpet, the air inlet pipe being connected to the front section of the trumpet, and the yarn bobbin being connected to the rear section of the trumpet; the main section of the trumpet is an expanding diameter structure that gradually increases from the input end to the output end, and the inner wall of the main section of the trumpet has several axial flow-guiding ribs evenly distributed along the circumferential direction, and the axial flow-guiding ribs are streamlined straight ribs.

[0007] Furthermore, both the front section and the rear section of the horn are straight cavity sections with a constant inner diameter, and the inner diameter of the front section of the horn is equal to the inner diameter of the air intake pipe, while the inner diameter of the rear section of the horn is equal to the inner diameter of the yarn tube.

[0008] Furthermore, the full expansion angle of the main section of the horn is 10°-25°.

[0009] Furthermore, the inner diameter of the front section of the horn is 80mm, and the inner diameter of the rear section of the horn is 245mm.

[0010] Furthermore, the total length of the horn-shaped current stabilizing body is 655mm, with the front section of the horn being 200mm long, the main section of the horn being 390mm long, and the rear section of the horn being 65mm long.

[0011] Furthermore, the width of the axial flow guide rib is constant, and the height of the axial flow guide rib gradually changes along the radial direction.

[0012] Furthermore, the width of the axial flow guide rib is 6-8mm, the height of the axial flow guide rib at the corresponding input end position is 3-4mm, and the height of the axial flow guide rib at the corresponding output end position is 8-10mm; the corners of the axial flow guide rib are rounded for transition, and the surface roughness Ra of the axial flow guide rib is ≤0.8μm.

[0013] Furthermore, the number of axial guide ribs is 8-12.

[0014] Furthermore, the front section of the horn is connected to the air intake pipe by a flange, and the rear section of the horn is connected to the yarn bobbin by a thread. The coaxiality error of the air intake pipe, the horn-shaped flow stabilizer body, and the yarn bobbin is ≤0.5mm. The horn-shaped flow stabilizer body is made of stainless steel.

[0015] Secondly, the application of a trumpet-shaped flow stabilizing device for supercritical carbon dioxide anhydrous dyeing, wherein the trumpet-shaped flow stabilizing device is applied to polyester fabric dyeing conditions with a pressure of 23-27MPa, a temperature of 90-130℃, and a single batch weight of 20-40kg.

[0016] By adopting the above-described technical solution of the present invention, at least the following beneficial effects are achieved: 1. By adopting a three-section horn-shaped diameter expansion structure, including the horn front section, the horn main section, and the horn tail section, and in conjunction with axially guided flow ribs with gradually varying heights, eddies, turbulence, and boundary layer separation can be effectively suppressed, achieving smooth fluid transition and uniform flow distribution, and improving flow velocity uniformity. Therefore, by applying this horn-shaped flow stabilization device to supercritical carbon dioxide dyeing equipment, the internal flow field of the supercritical carbon dioxide dyeing equipment can be effectively stabilized, making the dye distribution uniform, thereby improving dyeing uniformity and process stability, and reducing the defect rate.

[0017] 2. Through the streamlined structure design of the axial guide ribs and the full expansion angle design of the horn main section, the friction resistance of the fluid can be effectively reduced, the total pressure loss is minimized, and energy consumption is reduced; at the same time, it will not increase the load of the circulating pump, can be adapted to the original circulating system, and does not require modification of the pump body and pipeline.

[0018] 3. With a fixed-size design, it can accurately match the specifications of existing air intake pipes and yarn tubes. It can be directly added or modified, making it easy to install and highly versatile. Attached Figure Description

[0019] Figure 1 This is a structural diagram of a trumpet-shaped flow stabilizing device for supercritical carbon dioxide anhydrous dyeing according to the present invention. Figure 2 This is a structural diagram of the trumpet-shaped current-stabilizing body in this invention.

[0020] Figure label: 100-shaped horn-shaped current stabilizing device; Yarn tube 200; The horn-shaped current-stabilizing body 1, the horn front section 11, the horn main section 12, and the horn end section 13; Axial guide rib 2. Detailed Implementation

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0022] Please see the appendix Figures 1 to 2As shown, the present invention provides a trumpet-shaped flow stabilizing device 100 for supercritical carbon dioxide anhydrous dyeing. The trumpet-shaped flow stabilizing device 100 includes a trumpet-shaped flow stabilizing body 1 disposed between an air inlet pipe (not shown) and a yarn tube 200. The trumpet-shaped flow stabilizing body 1 includes a front section 11, a main section 12, and a rear section 13. The air inlet pipe is connected to the front section 11, and the yarn tube 200 is connected to the rear section 13, so that the fluid output from the air inlet pipe (such as supercritical carbon dioxide fluid) can pass through the front section 11, the main section 12, and the rear section 13 in sequence to achieve flow stabilization, and then enter the yarn tube 200 to achieve dyeing.

[0023] The main section 12 of the horn is an expansion structure that gradually increases in diameter from the input end to the output end. This is done to slow down the flow velocity decay by gradually increasing the flow cross-sectional area, thereby suppressing boundary layer separation. The inner wall of the main section 12 of the horn has several axial flow guide ribs 2 evenly distributed along the circumferential direction. The axial flow guide ribs 2 are streamlined straight ribs, that is, the axial flow guide ribs 2 are arranged in a straight line along the axial direction. The function of each axial flow guide rib 2 is to: divide the flow channel, suppress circumferential eddies, guide the axial flow of the fluid, and eliminate boundary layer separation and local turbulence.

[0024] In this invention, both the front section 11 and the rear section 13 of the horn are straight cavity sections with a constant inner diameter. The inner diameter of the front section 11 is equal to the inner diameter of the air inlet pipe, so that the air inlet pipe can smoothly deliver supercritical carbon dioxide fluid into the front section 11 of the horn. The inner diameter of the rear section 13 of the horn is equal to the inner diameter of the yarn tube 200, so that the rear section 13 of the horn can smoothly deliver supercritical carbon dioxide fluid into the inner cavity of the yarn tube 200.

[0025] The working principle of the horn-shaped flow stabilizing device 100 of the present invention is as follows: the supercritical carbon dioxide fluid output from the intake pipe first enters the front section 11 of the horn to achieve initial flow stabilization; then, it slowly expands through the main section 12 of the horn, gradually increasing the flow cross-sectional area, delaying the velocity decay, and suppressing boundary layer separation. In addition, the axial guide ribs 2 cut off the circumferential eddies and lateral disturbances, forcing the supercritical carbon dioxide fluid to flow orderly along the axial direction; finally, it is rectified and stabilized through the end section 13 of the horn, and the supercritical carbon dioxide fluid is smoothly sent into the inner cavity of the yarn tube 200, thereby eliminating turbulence and velocity dead zones and achieving uniform velocity distribution across the entire cross-section.

[0026] In some embodiments of the present invention, in order to better avoid fluid separation and suppress turbulence, the full expansion angle of the main section 12 of the horn is 10°-25°. By adopting the above structural design, the expansion can be smooth and eddies can be eliminated, while the overall length of the horn-shaped flow stabilizing device 100 is not too long. This can well balance the flow stabilizing effect and the rationality of the structural design.

[0027] As a preferred embodiment of the present invention, please refer to the following: Figure 2As shown, the inner diameter of the front section 11 of the horn The inner diameter of the front section 11 of the speaker is 80mm. That is, the inner diameter of the inlet of the main section 12 of the horn; and the inner diameter of the end section 13 of the horn. The inner diameter of the speaker's end section 13 is 245mm. That is, the outlet inner diameter of the main section 12 of the horn.

[0028] As a preferred embodiment of the present invention, please refer to the following: Figure 2 As shown, the total length of the horn-shaped current stabilizing body 1 is... It is 655mm, and the length of the front section 11 of the speaker is... The length of the main speaker section 12 is 200mm. The length of the speaker's end section 13 is 390mm. The diameter is 65mm. By adopting the above design of the inlet inner diameter of the horn main section 12, the outlet inner diameter of the horn main section 12, and the size of the horn-shaped flow stabilizing body 1, the flow stabilizing effect and the rationality of the structural design can be well balanced. That is, it can not only smoothly expand the diameter and eliminate eddies, but also prevent the horn-shaped flow stabilizing device 100 from being too long overall.

[0029] In some embodiments of the present invention, the width of the axial flow guide rib 2 is constant, and the height of the axial flow guide rib 2 gradually changes along the radial direction. By designing the axial flow guide rib 2 so that the height along the radial direction increases linearly along the flow direction, it can better adapt to the horn diameter expansion shape.

[0030] In a preferred embodiment of the present invention, the width of the axial flow guide rib 2 is 6-8 mm, which is also the thickness of the axial flow guide rib 2; the height of the axial flow guide rib 2 at the corresponding input end position is 3-4 mm, that is, the radial height of the axial flow guide rib 2 at the input end position is 3-4 mm; the height of the axial flow guide rib 2 at the corresponding output end position is 8-10 mm, that is, the radial height of the axial flow guide rib 2 at the output end position is 8-10 mm. The corners of the axial flow guide rib 2 are rounded to avoid flow loss at sharp corners, and the cross-section of the axial flow guide rib 2 is a streamlined rectangle; the surface roughness Ra of the axial flow guide rib 2 is ≤0.8μm to reduce the frictional resistance of the supercritical carbon dioxide fluid and avoid the formation of eddies.

[0031] In some embodiments of the present invention, in order to ensure that the horn-shaped flow stabilizing device 100 can better achieve flow stabilization while ensuring sufficient effective flow area, the number of axial flow guide ribs 2 is 8-12. As a preferred embodiment of the present invention, the number of axial flow guide ribs 2 is 10.

[0032] In some embodiments of the present invention, the front section 11 of the horn is connected to the air inlet pipe by a flange, and the rear section 13 of the horn is connected to the yarn tube 200 by a threaded connection. The coaxiality error of the air inlet pipe, the horn-shaped flow stabilizer 1, and the yarn tube 200 is ≤0.5mm to ensure that the supercritical carbon dioxide fluid can flow in a centered manner. The horn-shaped flow stabilizer 1 is made of stainless steel, such as 316L stainless steel, and requires polishing after molding to ensure that it is resistant to corrosion by the supercritical carbon dioxide fluid and adaptable to high-temperature and high-pressure conditions. In specific implementations of the present invention, it is necessary to ensure that after connecting the front section 11 of the horn to the air inlet pipe, the inner diameter of the front section 11 is equal to the inner diameter of the air inlet pipe, and that after connecting the rear section 13 of the horn to the yarn tube 200, the inner diameter of the rear section 13 is equal to the inner diameter of the yarn tube 200.

[0033] The calculation methods involved in this invention are as follows: (a) Calculation of the full expansion angle To prevent fluid separation and suppress turbulence, the main section 12 of the horn needs to have a reasonable full expansion angle. If the full expansion angle is too small, the horn-shaped flow stabilizing device 100 will be too long overall; if the full expansion angle is too large, it will cause boundary layer separation. The formula for calculating the half expansion angle is as follows: ; in, This indicates the half-expansion angle of the main section 12 of the horn (in degrees). This indicates the inner diameter of the inlet of the main section 12 of the horn, which is also the inner diameter of the front section 11 of the horn. This indicates the inner diameter of the outlet of the main section 12 of the horn, which is also the inner diameter of the end section 13 of the horn. This indicates the length of the main section 12 of the speaker; Substitute the numerical values ​​into the calculation: ; Full expansion angle is The full expansion angle falls exactly within the 10°-25° range defined in this invention, which can both smoothly expand the diameter and eliminate eddies, and prevent the trumpet-shaped flow stabilizing device 100 from being too long as a whole, thus achieving a good balance between flow stabilization effect and structural design rationality.

[0034] (II) Calculation of flow cross-sectional area and flow velocity 1. Calculation of cross-sectional area The inlet cross-sectional area (circular) of the main section 12 of the horn: ; The exit cross-sectional area (circular) of the main section 12 of the horn: ; The inner diameter of the inlet of the main section 12 of the horn. The inner diameter of the outlet of the main section 12 of the horn is obtained by substituting the numerical values. , ; 2. Flow rate verification According to the law of conservation of mass, neglecting fluid compressibility (i.e., under steady-state conditions), the flow velocity satisfies: ; in, The inlet velocity (m / s) of the main section 12 of the horn is indicated. The recommended inlet velocity for the supercritical carbon dioxide fluid dyeing system is 1.5-2.5 m / s. This represents the outlet velocity (m / s) of the main section 12 of the horn; take... If the value is 2 m / s, then the calculation yields... The flow velocity decreases gradually without drastic deceleration, thus avoiding the generation of eddies.

[0035] (III) Parameter calculation of axial guide rib 2 1. Calculation of the spacing between axial guide ribs 2 Because the axial guide ribs 2 are uniformly distributed circumferentially, the central angle between two adjacent axial guide ribs 2 is: ; in, This indicates the central angle between two adjacent axial guide ribs 2. Indicates the number of axial guide ribs 2, taking... It is 10 o'clock. ; 2. Correction of the effective flow area of ​​the axial guide rib 2 After taking into account the axial guide rib 2, the actual effective flow area is corrected using the following formula: ; in, Represents the corrected actual effective flow area (units). ); The theoretical flow area of ​​the circular tube without axial guide ribs 2 (units) ); This represents the cross-sectional area of ​​the single axial flow guide rib 2 (unit: ...). ); Indicates the number of axial guide ribs 2; This indicates the inner diameter of the pipe at the calculated cross-section (in mm). This indicates the width of the single axial flow guide rib 2 (i.e., the thickness of the axial flow guide rib 2). This indicates the height of the single-piece axial flow guide rib 2 in the radial direction at the cross-section.

[0036] After actual calculation, the corrected effective flow area is sufficient, the pressure drop loss is ≤3%, and it will not increase the load on the circulating pump.

[0037] (iv) Pressure loss verification Formula for calculating friction loss: ; in, Indicates pressure loss along the friction path; This represents the friction factor, which is typically taken as 0.015-0.02 for smooth pipes. This indicates the total length of the trumpet-shaped current-stabilizing body 1; Indicates the hydraulic diameter; This indicates the density of supercritical carbon dioxide fluid, typically ranging from 700 to 900 kg / m³. Indicates the average flow velocity across the cross section; Actual calculations show that the total pressure loss of the horn-shaped flow stabilizer 100 is ≤0.05MPa, which has minimal impact on system pressure and will not disrupt flow stability.

[0038] By adopting the above-described technical solution of the present invention, at least the following beneficial effects are achieved: 1. By adopting a three-section horn diameter expansion structure including the horn front section 11, the horn main section 12, and the horn end section 13, and in conjunction with the axial flow guide ribs 2 with gradually varying heights, eddies, turbulence, and boundary layer separation can be effectively suppressed, achieving smooth fluid transition and uniform flow distribution, and improving flow velocity uniformity. Therefore, by applying this horn-shaped flow stabilizing device 100 to supercritical carbon dioxide dyeing equipment, the internal flow field of the supercritical carbon dioxide dyeing equipment can be effectively stabilized, making the dye distribution uniform, thereby improving dyeing uniformity and process stability, and reducing the defect rate.

[0039] 2. Through the streamlined structure design of the axial guide rib 2 and the full expansion angle design of the horn main section 12, the friction resistance of the fluid can be effectively reduced, the total pressure loss is minimized, and energy consumption is reduced; at the same time, it will not increase the load of the circulating pump, can be adapted to the original circulating system, and does not require modification of the pump body and pipeline.

[0040] 3. With a fixed-size design, it can accurately match the specifications of existing air intake pipes and 200mm yarn tubes. It can be directly added or modified, making it easy to install and highly versatile. Example

[0041] Please see the appendix Figures 1 to 2As shown, this invention also provides an application of a trumpet-shaped flow stabilizing device 100 for supercritical carbon dioxide anhydrous dyeing. The trumpet-shaped flow stabilizing device 100 is applied to a polyester fabric dyeing process with a pressure of 23-27 MPa, a temperature of 90-130℃, and a single batch capacity of 20-40 kg. The specific structure and technical effects of the trumpet-shaped flow stabilizing device 100 are exactly the same as in Embodiment 1, and will not be repeated here. By applying the above-mentioned trumpet-shaped flow stabilizing device 100 to a polyester fabric dyeing process with a pressure of 23-27 MPa, a temperature of 90-130℃, and a single batch capacity of 20-40 kg, the flow rate non-uniformity can be well controlled within 5%, and the pressure pulsation can be controlled within ±0.1 MPa, thereby significantly improving the dyeing uniformity of the polyester fabric.

[0042] The technical solution of the present invention will be further described and illustrated below with a specific example: A trumpet-shaped flow stabilizing device 100 for supercritical carbon dioxide anhydrous dyeing, the trumpet-shaped flow stabilizing device 100 is adapted to a 30kg polyester horizontal warp beam dyeing kettle, the operating conditions are pressure 23-27MPa, temperature 90-130℃. The dimensions of the horn-shaped current stabilizing device 100 are as follows: inlet inner diameter D1 = 80 mm, outlet inner diameter D2 = 245 mm, total length L1 of the horn-shaped current stabilizing body is 655 mm, length L2 of the front section of the horn is 200 mm, length L4 of the main section of the horn is 390 mm, and length L3 of the end section of the horn is 65 mm. Axial guide rib 2 configuration: 10 axial guide ribs 2 are evenly distributed in the inner circumference of the main section 12 of the speaker. The width of the axial guide rib 2 is 7mm, the height of the axial guide rib 2 at the corresponding input end is 3.5mm, the height of the axial guide rib 2 at the corresponding output end is 9mm, the axial guide rib 2 adopts a streamlined straight rib, the surface roughness Ra of the axial guide rib 2 is ≤0.8μm, and the corners of the axial guide rib 2 are rounded for transition; Material: The entire horn-shaped flow stabilizer body 1 is made of 316L stainless steel, which is resistant to corrosion by supercritical carbon dioxide fluid, can adapt to high temperature and high pressure conditions, and is polished after molding. Installation method: The front section 11 of the horn is connected to the air inlet pipe by a flange, and the rear section 13 of the horn is connected to the yarn tube 200 by a thread. The coaxiality error of the air inlet pipe, the horn-shaped flow stabilizer 1 and the yarn tube 200 is ≤0.5mm, so as to ensure that the supercritical carbon dioxide fluid can flow in the center. Experimental Results: Actual testing showed that the 100-type horn-shaped flow stabilizing device can completely eliminate turbulence caused by sudden changes in pipe diameter. The outlet cross-sectional flow velocity non-uniformity is ≤4.5%, the pressure pulsation is within ±0.08MPa, the coefficient of variation of the K / S value of polyester dyeing is ≤3%, there is no color difference or color defects, the heat preservation time is shortened by 10%-15%, and the production efficiency and product qualification rate are significantly improved.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A trumpet-shaped flow stabilizing device for supercritical carbon dioxide anhydrous dyeing, characterized in that, It includes a trumpet-shaped flow stabilizer body located between the air inlet pipe and the yarn bobbin; the trumpet-shaped flow stabilizer body includes a front section of the trumpet, a main section of the trumpet, and a rear section of the trumpet, the air inlet pipe is connected to the front section of the trumpet, and the yarn bobbin is connected to the rear section of the trumpet; the main section of the trumpet is an expanding diameter structure that gradually increases from the input end to the output end, and the inner wall of the main section of the trumpet has several axial flow guide ribs evenly distributed along the circumferential direction, and the axial flow guide ribs are streamlined straight ribs.

2. The trumpet-shaped flow stabilizing device for supercritical carbon dioxide anhydrous dyeing according to claim 1, characterized in that, Both the front and rear sections of the horn are straight cavity sections with a constant inner diameter, and the inner diameter of the front section of the horn is equal to the inner diameter of the air intake pipe, while the inner diameter of the rear section of the horn is equal to the inner diameter of the yarn tube.

3. The trumpet-shaped flow stabilizing device for supercritical carbon dioxide anhydrous dyeing according to claim 1, characterized in that, The full expansion angle of the main section of the horn is 10°-25°.

4. The trumpet-shaped flow stabilizing device for supercritical carbon dioxide anhydrous dyeing according to claim 3, characterized in that, The inner diameter of the front section of the horn is 80mm, and the inner diameter of the rear section of the horn is 245mm.

5. The trumpet-shaped flow stabilizing device for supercritical carbon dioxide anhydrous dyeing according to claim 4, characterized in that, The total length of the horn-shaped current stabilizer is 655mm, with the front section of the horn being 200mm long, the main section being 390mm long, and the rear section being 65mm long.

6. The trumpet-shaped flow stabilizing device for supercritical carbon dioxide anhydrous dyeing according to claim 1, characterized in that, The width of the axial flow guide rib is constant, and the height of the axial flow guide rib gradually changes along the radial direction.

7. The trumpet-shaped flow stabilizing device for supercritical carbon dioxide anhydrous dyeing according to claim 6, characterized in that, The width of the axial flow guide rib is 6-8mm, the height of the axial flow guide rib at the corresponding input end is 3-4mm, and the height of the axial flow guide rib at the corresponding output end is 8-10mm; the corners of the axial flow guide rib are rounded, and the surface roughness Ra of the axial flow guide rib is ≤0.8μm.

8. The trumpet-shaped flow stabilizing device for supercritical carbon dioxide anhydrous dyeing according to claim 1, characterized in that, The number of axial guide ribs is 8-12.

9. The trumpet-shaped flow stabilizing device for supercritical carbon dioxide anhydrous dyeing according to claim 1, characterized in that, The front section of the horn is connected to the air intake pipe by a flange, and the rear section of the horn is connected to the yarn bobbin by a thread. The coaxiality error of the air intake pipe, the horn-shaped flow stabilizer body, and the yarn bobbin is ≤0.5mm. The horn-shaped flow stabilizer body is made of stainless steel.

10. An application of a funnel-shaped flow stabilizing device for supercritical carbon dioxide anhydrous dyeing according to any one of claims 1-9, characterized in that, The trumpet-shaped flow stabilizing device is used in polyester fabric dyeing processes with pressures of 23-27 MPa, temperatures of 90-130℃, and a single batch weight of 20-40 kg.

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