Supercritical CO2 dyeing kettle with CO2 circulation driven by magnetic motor

Abstract

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.

Description

Technical Field

[0001] The invention relates to a textile product dyeing device, in particular to a supercritical CO2 dyeing kettle with a magnetic motor driving the CO2 circulation. Background Art

[0002] The current supercritical CO2 dyeing process mainly consists of CO2 cylinders, condensers, plunger pumps, heat exchangers, dissolving kettles, CO2 circulation pumps, dyeing kettles, and separation kettles. During the dyeing process, the dissolving and dyeing kettles require continuous heating, which consumes a lot of energy. Furthermore, the use of a CO2 circulation pump causes uneven CO2 flow in the dyeing kettle, making it impossible to precisely control the flow direction. This leads to prominent problems such as uneven dyeing. For example:

[0003] The utility model patent application number is 201821160619.9, and is titled "A Supercritical CO2 Dyeing Device." Although it uses a magnetic coupling drive device to drive the main warp beam with a stirring blade to accelerate the diffusion of the dye solution and improve the dyeing effect, it only speeds up the disordered diffusion of the dye solution, and the problem of uneven dyeing still exists.

[0004] The utility model patent application number is 201821484222.5, and the name is "A supercritical carbon dioxide liquefaction dyeing device". The center of the dyeing kettle cover is inserted with a vertical rotating shaft, on which a cloth clamp and fan blades are set. The cloth clamp and fan blades can be driven by a drive motor to rotate. The fan blades only accelerate the disorderly diffusion of the dye solution, and the problem of uneven dyeing still exists.

[0005] The utility model patent application number is 201921677202.4, and the name is "A Horizontal Supercritical Dyeing Kettle". The dyeing core tube rotates around its own axis under the drive of the dyeing tube drive motor. Under the action of centrifugal force, the outward diffusion pressure of the supercritical fluid is increased, and it also plays a stirring role, improving the dyeing effect. However, the device is that the dye liquid flows into the feed port, passes through the dyeing core tube, and flows out from the discharge port. To complete the dyeing, it needs to be equipped with a dissolving kettle and a CO2 circulation pump. At the same time, the device uses a jacket heat exchange and a rubber-sealed shaft sealing device, which has low heat exchange efficiency and poor sealing effect.

[0006] The invention patent application number is 202010321938.9, and the name is "A Supercritical Fluid Jigger." The invention patent sets a guide roller in the dyeing kettle to increase the exposure surface of a single layer of fabric. It has high dyeing efficiency and uniformity, but the space utilization rate is low and it cannot achieve the dyeing of large pieces of fabric.

[0007] The invention patent application number is 202410018257.3, and the name is "A supercritical carbon dioxide dyeing reactor warp beam structure with capillary action". Grooves and sieve holes are set on the hollow warp beam. Under the action of capillary force, the dye liquid enters the grooves and enters the fiber fabric through penetration and adsorption to dye. However, the dye liquid flow rate is too fast, and the dye liquid may not pass through the grooves and directly enter the fiber fabric through the sieve holes, resulting in uneven dyeing of the fiber fabric that does not correspond to the sieve holes. The dye liquid flow rate is too slow, and the dyeing efficiency is low.

[0008] The invention patent application number is 202410167966.8, and the name is "A supercritical carbon dioxide dyeing kettle with a wing-type distributor". The wing-type distributor is installed in the dyeing kettle, and the through holes along the axial and radial directions are successively larger, which minimizes the concentration gradient of the dye solution in the dyeing kettle and solves the problem of uneven dyeing. However, the fabric needs to ensure that the fan-shaped cylinder is loaded into the dyeing kettle, which easily causes uneven stacking and dead zones of dye solution. At the same time, there are too many partitions, which is not suitable for dyeing large pieces of cloth.

[0009] To summarize the above patents, their characteristics are that a stirring device is added to the dyeing kettle to increase the flow rate of the dye solution and improve the dyeing efficiency, or different through holes are opened on the warp beam, or guide rollers are set to increase the exposure surface of the single-layer fabric to improve the dyeing uniformity. However, they need to be matched with a dissolving kettle and a CO2 circulation pump, which has high energy consumption and cannot accurately control the flow direction of the dye solution. Summary of the Invention

[0010] The purpose of the present invention is to overcome the defects and shortcomings of the existing supercritical CO2 dyeing kettle and provide a supercritical CO2 dyeing kettle with a magnetic motor driving the CO2 circulation.

[0011] In order to achieve the above-mentioned object, the technical solution of the present invention is composed of a dyeing vat, a magnetic coupling drive mechanism and a fabric assembly, wherein:

[0012] The dye vat is mainly composed of a quick-opening cylinder cover, a clamp opening and closing device, a cylinder body, a bidirectional impeller, a spiral propulsion shaft, spiral blades, a heat-conducting oil spiral coil, bolts and a sealing ring.

[0013] Furthermore, one end of the cylinder body is a non-removable cylinder head, and a bearing groove is provided on the axis of the non-removable cylinder head for installing the bearing of the spiral propulsion shaft. The diameter of the non-removable cylinder head matches the cylinder body and is connected to the cylinder body by welding. A flange is provided at one end for installing a quick-opening cylinder cover; a CO2 inlet is provided at the bottom end of the cylinder body, and a CO2 outlet is provided at the top end of the cylinder body; a heat-conducting oil spiral coil is provided inside the cylinder body, and the CO2 inlet at the bottom end of the cylinder body has radially symmetrical openings as the heat-conducting oil pipe inlet, which is connected to the bottom end of the heat-conducting oil spiral coil by welding, and the CO2 outlet at the top end of the cylinder body has radially symmetrical openings as the heat-conducting oil pipe outlet, which is connected to the top end of the heat-conducting oil spiral coil by welding;

[0014] Furthermore, the quick-opening cylinder cover is a flat cover with a boss, the boss is provided with a sealing groove and a sealing ring, and is connected to the cylinder body through a clamp opening and closing device. A through hole is provided at the axis of the quick-opening flat cover to match the outer ring of the bearing on the inner magnetic rotor of the magnetic coupling drive mechanism, and a threaded hole is provided at the outer end of the quick-opening cylinder cover to match the shaft cover of the magnetic coupling drive mechanism;

[0015] Furthermore, one end of the spiral propulsion shaft is a shaft head that matches the stepped hole at one end of the inner magnetic rotor. The shaft head is provided with a threaded hole for a countersunk screw to connect and fix the spiral propulsion shaft and the inner magnetic rotor, and a thread is used for a nut to fix the bidirectional impeller. One end is a shaft neck that matches the inner ring of the roller bearing; the spiral blades are connected to the spiral propulsion shaft by welding.

[0016] The magnetic coupling drive mechanism is mainly composed of a variable frequency motor, a support base, an inner end cover of the support base, an outer magnetic rotor, an isolation sleeve, a cooling jacket, an inner magnetic rotor, a shaft cover, bolts and a sealing ring.

[0017] Furthermore, the top axis of the support base is provided with a through hole and a bearing groove that match the output shaft of the variable frequency motor, as well as a through hole that matches the fixed variable frequency motor and the inner end cover of the support base, and the bottom end of the support base is provided with a flange and a through hole that matches the sealing surface of the upper end of the shaft cover;

[0018] Furthermore, the outer magnetic rotor is connected to the output shaft of the variable frequency motor through a key and a nut, and the outer magnetic strips and the outer magnetic rotor are connected by riveting or screws;

[0019] Furthermore, the shaft cover is provided with a through hole matching the isolation sleeve and a bearing groove for installing the bearing along the axis, and the shaft cover is connected to the open end of the isolation sleeve by welding; the shaft cover is provided with a through hole matching the sealing surface and threaded hole of the quick-opening cylinder cover, a sealing groove, and a threaded hole matching the sealing surface and through hole of the flange at the bottom end of the support seat;

[0020] Furthermore, the isolation sleeve is provided with a cooling jacket, and the cooling jacket is provided with a heat exchange fluid inlet and a heat exchange fluid outlet;

[0021] ] Furthermore, the inner magnetic strip and the inner magnetic rotor are connected by rivets or screws.

[0022] The fabric assembly mainly consists of a dye box, a cloth roller and fabric.

[0023] Furthermore, the dye box is annular and fixed to the upper end of the cylinder body by screws;

[0024] Furthermore, the middle of the cloth roller is a mesh cylinder with a diameter matching or slightly larger than the outer diameter of the spiral blade, and discs with a middle opening diameter matching the mesh cylinder are welded at both ends for winding fabric.

[0025] The assembly relationship between the components of the present invention is as follows:

[0026] First, a cooling jacket with the same inner diameter as the outer diameter of the isolation sleeve is directly placed on the isolation sleeve and connected to the isolation sleeve by welding. A heat exchange fluid inlet and a heat exchange fluid outlet are fixedly installed on the cooling jacket.

[0027] Secondly, install the open end of the isolation sleeve into the through hole that matches the shaft cover and connect them by welding; then install the sealing ring in the sealing groove of the shaft cover, and then install the shaft cover on the outer end face of the quick-opening cylinder cover, and fix the shaft cover to the quick-opening cylinder cover with bolts;

[0028] Third, install the rolling bearing outer ring of the bearing into the bearing groove at the top of the support seat, then install the output shaft of the variable frequency motor into the through hole that matches the top of the support seat, the rolling bearing inner ring of the bearing and the inner end cover of the support seat, and fix the variable frequency motor, support seat and the inner end cover of the support seat with bolts; then install the outer magnetic rotor on the output shaft of the variable frequency motor with the key in place and fix it with nuts; finally, install the bottom end face of the support seat on the sealing gasket on the outer end face of the shaft cover and fix it to the shaft cover with bolts;

[0029] Fourth, the spiral blades are connected to the spiral propeller shaft by welding; the rolling bearing inner ring and the quick-opening inner end cover of the bearing are sequentially installed on the inner magnetic rotor, installed in the isolation sleeve, and the quick-opening inner end cover is fixed to the quick-opening cylinder head by the hexagon socket bolts; the nut and the bidirectional impeller are installed on the spiral propeller shaft; the shaft head at one end of the spiral propeller shaft is installed in the stepped hole of the inner magnetic rotor, fixed by the countersunk screw, and the nut is tightened to fix the bidirectional impeller;

[0030] Fifth, install the thermal oil spiral coil in the cylinder body, weld the bottom opening of the cylinder body to the thermal oil pipe inlet, and weld the top opening of the cylinder body to the thermal oil pipe outlet;

[0031] Sixth, fix the dye box to the upper end of the cylinder with screws, and place the cloth roller with the wrapped fabric into the cylinder;

[0032] Seventh, install the sealing ring in the sealing groove of the quick-opening cylinder cover, and fix the roller bearing installed on the shaft diameter of the spiral propulsion shaft with a nut; then, install the spiral propulsion shaft along the mesh cylinder inside the cloth roller disk into the inner cavity of the cylinder body, and then install the quick-opening cylinder cover on the upper end flange of the cylinder body, and fix the quick-opening cylinder cover to the cylinder body with a clamp opening and closing device.

[0033] The advantages of the present invention are as follows: Using magnetically driven spiral propeller blades and a bidirectional impeller, the dye liquor flows upward from the center of the mesh cylinder within the cloth stick plate. Simultaneously, the lower impeller of the bidirectional impeller rotates, evenly distributing the dye liquor to the surrounding area. The dye liquor passes through the dye box, becoming a saturated dye liquor that evenly penetrates the fabric, completing the dyeing process. The upper impeller of the bidirectional impeller draws CO2 out of the isolation sleeve, reducing the pressure within the isolation sleeve and simultaneously reducing the diffusion of CO2 between the isolation sleeve and the dye vat. The rotation of the blades and bidirectional impeller controls the flow direction and speed, improving dyeing efficiency and uniformity, and eliminating the need for a dissolving kettle and a CO2 circulation pump in the supercritical CO2 dyeing process. The use of internal heat exchange improves heat exchange efficiency and reduces energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0035] Figure 2 for Figure 1 A partial enlarged view of center C;

[0036] Figure 3 for Figure 1 A partial enlarged view of middle D;

[0037] Figure 4 for Figure 1 A partial enlarged view of middle E;

[0038] Reference numerals:

[0039] 1. Magnetic coupling drive mechanism 1-1, variable frequency motor 1-1-1, key 1-1-2, nut 1-2, support base 1-2-1, bearing 1-2-2, bolt 1-2-3, sealing gasket 1-3, support base inner end cover 1-3-1, sealing ring 1-3-2, bolt 1-4, outer magnetic rotor 1-4-A, outer magnetic strip 1-5, isolation sleeve 1-5-1, cooling jacket 1-5-A, heat exchange fluid inlet 1-5-B, heat exchange fluid outlet 1-6, inner magnetic rotor 1-6-A, inner magnetic strip 1-7, shaft cover 1-7-1, bearing 1-7-2, bolt 1-7-3, sealing ring

[0040] 2. Dye vat 2-1, quick-opening cylinder cover 2-1-1, sealing ring 2-1-2, bearing 2-2, clamp opening and closing device 2-3, cylinder body 2-3-A, CO2 inlet 2-3-B, CO2 outlet 2-4, quick-opening inner end cover 2-4-1, hexagon socket bolt 2-5, bidirectional impeller 2-6, spiral propeller shaft 2-6-1, spiral blade 2-6-2, countersunk screw 2-6-3, nut 2-6-4, roller bearing 2-6-5, nut 2-7, thermal oil spiral coil 2-7-A, thermal oil pipe inlet 2-7-B, thermal oil pipe outlet

[0041] 3. Fabric assembly 3-1, dye box 3-2, cloth roller 3-3, fabric DETAILED DESCRIPTION

[0042] The embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0043] The technical solution of the present invention is composed of a dye vat 2, a magnetic coupling drive mechanism 1 and a fabric assembly 3. Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown.

[0044] The dye vat 2 is mainly composed of a quick-opening cylinder cover 2-1, a sealing ring 2-1-1, a clamp opening and closing device 2-2, a cylinder body 2-3, a CO2 inlet 2-3-A, a CO2 outlet 2-3-B, a quick-opening inner end cover 2-4, a hexagon socket bolt 2-4-1, a bidirectional impeller 2-5, a spiral propulsion shaft 2-6, a spiral blade 2-6-1, a countersunk screw 2-6-2, a nut 2-6-3, a roller bearing 2-6-4, a nut 2-6-5 and a thermal oil spiral coil 2-7.

[0045] The above-mentioned cylinder body 2-3 is a cylinder rolled from stainless steel plate or a stainless steel seamless steel pipe. One end is a non-detachable cylinder head, whose diameter matches that of the cylinder body 2-3 and is connected to the cylinder body 2-3 by welding. A bearing groove is set on the internal axis of the non-detachable cylinder head for installing the roller bearing 2-6-4 on the spiral propulsion shaft 2-6. A flange is set on one end for installing the quick-opening cylinder cover 2-1. A CO2 inlet 2-3-A is set at the bottom end of the cylinder body 2-3, and a CO2 outlet 2-3-B is set at the top end of the cylinder body 2-3. A heat transfer oil spiral coil 2-7 is set inside the cylinder body 2-3. The CO2 inlet 2-3-A at the bottom end of the cylinder body 2-3 opens radially symmetrically as the heat transfer oil pipe inlet 2-7-A, which is connected to the bottom end of the heat transfer oil spiral coil 2-7 by welding. The CO2 outlet 2-3-B at the top end of the cylinder body 2-3 opens radially symmetrically as the heat transfer oil pipe outlet 2-7-B, which is connected to the top end of the heat transfer oil spiral coil 2-7 by welding.

[0046] The above-mentioned quick-opening cylinder cover 2-1 is a flat cover with a boss. The boss is provided with a sealing groove and a sealing ring 2-1-1. It is connected to the cylinder body 2-3 through a clamp opening and closing device 2-2. A through hole is provided at the axis of the quick-opening cylinder cover 2-1 to match the outer ring of the bearing 1-7-1 on the inner magnetic rotor 1-6 of the magnetic coupling drive mechanism 1. A threaded hole is provided at the outer end of the quick-opening cylinder cover 2-1 to match the shaft cover 1-7.

[0047] One end of the above-mentioned spiral propeller shaft 2-6 is a shaft head that matches the stepped hole at one end of the inner magnetic rotor 1-6. The shaft head is provided with a threaded hole for a countersunk screw 2-6-2 to connect and fix the spiral propeller shaft 2-6 and the inner magnetic rotor 1-6, and a thread for a nut 2-6-3 to fix the bidirectional impeller 2-5. One end is a shaft neck that matches the inner ring of the roller bearing 2-6-4; the spiral blade 2-6-1 is connected to the spiral propeller shaft 2-6 by welding;

[0048] The magnetic coupling drive mechanism 1 is mainly composed of a variable frequency motor 1-1, a support base 1-2, an outer magnetic rotor 1-4, an isolation sleeve 1-5, a heat exchange fluid inlet 1-5-A, a heat exchange fluid outlet 1-5-B, an inner magnetic rotor 1-6 and a shaft cover 1-7.

[0049] The top axis of the support base 1-2 is provided with a through hole and a bearing groove that match the output shaft of the variable frequency motor 1-1, as well as a through hole that matches the inner end cover 1-3 of the support base for fixing the variable frequency motor 1-1. The bottom end of the support base 1-2 is provided with a flange and a through hole that matches the sealing surface of the upper end of the shaft cover 1-7;

[0050] The outer magnetic rotor 1-4 is connected to the output shaft of the variable frequency motor 1-1 through a key 1-1-1 and a nut 1-1-2, and the outer magnetic strip 1-4-A is connected to the outer magnetic rotor 1-4 by riveting or screws;

[0051] The above-mentioned shaft cover 1-7 is provided with a through hole matching the isolation sleeve 1-5 and a bearing groove for installing the bearing 1-7-1 along the axis, and is connected to the open end of the isolation sleeve 1-5 by welding; the shaft cover 1-7 is provided with a through hole and a sealing groove matching the sealing surface and threaded hole of the quick-opening cylinder cover 2-1, and a threaded hole matching the sealing surface and through hole of the bottom flange of the support seat 1-2;

[0052] The inner magnetic strip 1-6-A is connected to the inner magnetic rotor 1-6 by rivet welding or screws;

[0053] The above-mentioned isolation sleeve 1-5 is provided with a cooling jacket 1-5-1, and the cooling jacket 1-5-1 is provided with a heat exchange fluid inlet 1-5-A and a heat exchange fluid outlet 1-5-B.

[0054] The fabric assembly 3 is mainly composed of a dye box 3-1, a cloth roller 3-2 and a fabric 3-3.

[0055] The dye box 3-1 is annular and fixed to the upper end of the cylinder 2-3 by screws;

[0056] The cloth roller 3-2 has a mesh cylinder in the middle with a diameter matching or slightly larger than the outer diameter of the spiral blade 2-6-1. Discs with a middle opening diameter matching the mesh cylinder are welded at both ends for winding the fabric 3-3.

[0057] The assembly relationship between the components of the present invention is as follows:

[0058] First, directly put the cooling jacket 1-5-1 with the same inner diameter as the outer diameter of the isolation sleeve 1-5 on the isolation sleeve 1-5, connect it to the isolation sleeve 1-5 by welding, and fix the heat exchange fluid inlet 1-5-A and the heat exchange fluid outlet 1-5-B on the cooling jacket 1-5-1;

[0059] Secondly, install the open end of the isolation sleeve 1-5 into the through hole that matches the shaft cover 1-7 and connect them by welding; install the sealing ring 1-7-3 in the sealing groove of the shaft cover 1-7, and then install the shaft cover 1-7 on the outer end surface of the quick-opening cylinder cover 2-1, and fix the shaft cover 1-7 to the quick-opening cylinder cover 2-1 with bolts 1-7-2;

[0060] Third, install the rolling bearing outer ring of bearing 1-2-1 into the bearing groove at the top of support base 1-2, then install the output shaft of frequency conversion motor 1-1 into the through hole matching the top of support base 1-2, the rolling bearing inner ring of bearing 1-2-1 and the inner end cover 1-3 of support base, and fix the frequency conversion motor 1-1 and support base 1-2 with bolts 1-3-2; then install the outer magnetic rotor 1-4 on the output shaft of frequency conversion motor 1-1 with key 1-1-1 in place, and fix it with nuts 1-1-2; finally, install the bottom end face of support base 1-2 on the sealing gasket 1-2-3 on the outer end face of shaft cover 1-7, and fix it to shaft cover 1-7 with bolts 1-2-2;

[0061] Fourth, connect the spiral blade 2-6-1 to the spiral propeller shaft 2-6 by welding; install the rolling bearing inner ring of the bearing 1-7-1 and the bearing 2-1-2, and the quick-opening inner end cover on the inner magnetic rotor 1-6 in sequence, and install them in the isolation sleeve 1-5. Fix the quick-opening inner end cover 2-4 to the quick-opening cylinder head 2-1 by the hexagon socket bolt 2-4-1; install the nut 2-6-3 and the bidirectional impeller 2-5 on the spiral propeller shaft 2-6, and then install the shaft head of one end of the spiral propeller shaft 2-6 in the stepped hole of the inner magnetic rotor 1-6 and fix it with the countersunk screw 2-6-2. Then tighten the nut 2-6-3 to fix the bidirectional impeller 2-5;

[0062] Fifth, install the thermal oil spiral coil 2-7 in the cylinder body 2-3, weld it to the thermal oil pipe inlet 2-7-A at the bottom opening of the cylinder body 2-3, and weld it to the thermal oil pipe outlet 2-7-B at the top opening of the cylinder body 2-3;

[0063] Sixth, fix the dye box 3-1 to the upper end of the cylinder 2-3 with screws, and place the cloth roller 3-2 wrapped with the fabric 3-3 into the cylinder 2-3;

[0064] Seventh, install the sealing ring 2-1-1 in the sealing groove of the quick-opening cylinder cover 2-1, and fix the roller bearing 2-6-4 installed on the axis of the spiral propulsion shaft 2-6 with the nut 2-6-5; then, install the spiral propulsion shaft 2-6 along the mesh cylinder in the cloth roller disk 3-2 into the inner cavity of the cylinder body 2-3, and then install the quick-opening cylinder cover 2-1 on the upper end flange of the cylinder body 2-3, and fix the quick-opening cylinder cover 2-1 to the cylinder body 2-3 with the clamp opening and closing device 2-2.

[0065] The working steps of the present invention are:

[0066] First, open the clamp opening and closing device 2-2 and raise and open the quick-opening cylinder cover 2-1;

[0067] Next, store sufficient dye in the dye box 3-1, wrap the fabric 3-3 around the cloth roller 3-2, secure it with a stainless steel tie, and install the cloth roller 3-2 into the cylinder 2-3;

[0068] Third, the screw propeller shaft 2-6 is inserted along the mesh cylinder inside the cloth roller disc 3-2, and the roller bearing 2-6-4 installed on the axis of the screw propeller shaft 2-6 is installed into the bearing groove inside the non-removable cylinder head of the cylinder body 2-3. The quick-opening cylinder cover 2-1 is closed in place, and the clamp opening and closing device 2-2 is closed;

[0069] Fourth, connect the heat exchange fluid inlet 1-5-A and the heat exchange fluid outlet 1-5-B of the cooling jacket to the cooling external circulation management, and the coolant circulates; connect the heat transfer oil pipe inlet 2-7-A and the heat transfer oil pipe outlet 2-7-B on the cylinder body 2-3 to the heat transfer oil external circulation management, and the heat transfer oil circulates; connect the CO2 inlet 2-3-A and the CO2 outlet 2-3-B on the cylinder body 2-3 to the supercritical CO2 external pipeline, and charge the cooled liquid CO2;

[0070] Fifth, when the temperature and pressure reach the preset setting values, start the frequency conversion motor 1-1 and start dyeing. After the dyeing is completed for a specified time, open the CO2 outlet 2-3-B of the cylinder 2-3. After the pressure drops to atmospheric pressure, open the clamp opening and closing device 2-2, raise and open the quick-opening cylinder cover 2-1, take out the cloth roller 3-2, and complete the dyeing process.

[0071] The present invention utilizes magnetically driven spiral propulsion shaft blades and a bidirectional impeller. The dye liquor flows upward from the center of the mesh cylinder within the cloth stick plate. Simultaneously, the lower impeller of the bidirectional impeller rotates, evenly flinging the dye liquor to the surrounding area. The dye liquor passes through the dye box, becoming a saturated dye liquor that evenly penetrates the fabric, completing the dyeing process. The upper impeller of the bidirectional impeller can absorb the CO2 from the isolation sleeve, reducing the pressure of the isolation sleeve and simultaneously reducing the mutual diffusion of CO2 from the isolation sleeve and the CO2 in the dye vat. The rotation of the blades and bidirectional impeller can control the flow direction and speed, improving dyeing efficiency and dyeing uniformity, and eliminating the two devices, the dissolution kettle and CO2 circulation pump, used in the supercritical CO2 dyeing process. The use of internal heat exchange improves heat exchange efficiency and reduces energy consumption.

Claims

1. A supercritical CO2 dyeing kettle with a magnetic motor driving CO2 circulation, characterized in that: It consists of a dye vat, a magnetic coupling drive mechanism and a fabric assembly, wherein: the dye vat is mainly composed of a quick-opening cylinder cover, a clamp opening and closing device, a cylinder body, a bidirectional impeller, a spiral propulsion shaft, spiral blades, a thermal oil spiral coil, bolts and a sealing ring; the magnetic coupling drive mechanism is mainly composed of a frequency conversion motor, a support base, an inner end cover of the support base, an outer magnetic rotor, an isolation sleeve, a cooling jacket, an inner magnetic rotor, a shaft cover, bolts and a sealing ring; the fabric assembly is mainly composed of a dye box, a cloth roller and fabric.

2. The supercritical CO2 dyeing kettle with a magnetic motor driving CO2 circulation as claimed in claim 1, characterized in that: One end of the cylinder body is a non-removable cylinder head, and a bearing groove is provided on the axis of the non-removable cylinder head for installing the bearing of the spiral propulsion shaft. The diameter of the non-removable cylinder head matches the cylinder body and is connected to the cylinder body by welding. A flange is provided at one end for installing a quick-opening cylinder cover; a CO2 inlet is provided at the bottom end of the cylinder body, and a CO2 outlet is provided at the top end of the cylinder body; a heat-conducting oil spiral coil is provided inside the cylinder body, and the CO2 inlet at the bottom end of the cylinder body opens radially symmetrically as the heat-conducting oil pipe inlet, which is connected to the bottom end of the heat-conducting oil spiral coil by welding, and the CO2 outlet at the top end of the cylinder body opens radially symmetrically as the heat-conducting oil pipe outlet, which is connected to the top end of the heat-conducting oil spiral coil by welding; The quick-opening cylinder cover is a flat cover with a boss, and the boss is provided with a sealing groove and a sealing ring, and is connected to the cylinder body through a clamp opening and closing device. A through hole matching the outer ring of the bearing on the inner magnetic rotor of the magnetic coupling drive mechanism is provided at the axis center of the quick-opening flat cover, and a threaded hole matching the shaft cover of the magnetic coupling drive mechanism is provided at the outer end of the quick-opening cylinder cover; one end of the spiral propulsion shaft is a shaft head matching the step hole at one end of the inner magnetic rotor, and the shaft head is provided with a threaded hole for a countersunk screw to connect and fix the spiral propulsion shaft and the inner magnetic rotor, and a thread for a nut to fix the bidirectional impeller, and one end is a shaft neck matching the inner ring of the roller bearing; the spiral blade is connected to the spiral propulsion shaft by welding.

3. The supercritical CO2 dyeing kettle with a magnetic motor driving CO2 circulation as claimed in claim 1, characterized in that: The top axis of the support seat is provided with a through hole and a bearing groove that match the output shaft of the variable frequency motor, as well as a through hole that matches the inner end cover of the fixed support seat. The bottom end of the support seat is provided with a flange, which is sealed with the upper end sealing surface of the shaft cover and the through hole of the mounting support seat; the external magnetic rotor is connected to the output shaft of the variable frequency motor through a key and a nut; the shaft cover is provided with a through hole that matches the isolation sleeve and a bearing groove for mounting the bearing along the axis, and the shaft cover is connected to the open end of the isolation sleeve by welding; the shaft cover is provided with a through hole that matches the sealing surface and threaded hole of the quick-opening cylinder cover, as well as a sealing groove and a threaded hole that matches the sealing surface and through hole of the bottom flange of the support seat; the isolation sleeve is provided with a cooling jacket, and the cooling jacket is provided with a heat exchange fluid inlet and a heat exchange fluid outlet.

4. The supercritical CO2 dyeing kettle with a magnetic motor driving CO2 circulation as claimed in claim 1, characterized in that: The dye box is annular and fixed to the upper end of the cylinder body by screws; the middle of the cloth roller is a mesh cylinder with a diameter matching the outer diameter of the spiral blade or slightly larger than the outer diameter of the spiral blade, and discs with a middle opening diameter matching the mesh cylinder are welded at both ends for winding fabric.

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