A device suitable for the regeneration and dissolution of waste cotton textiles

Abstract

The utility model discloses an equipment suitable for waste cotton textile regeneration and dissolution relates to the technical field of waste cotton textile recycling. The equipment includes horizontal stirring drum with clamping cavity, stirrer arranged along the middle of stirring drum inner chamber, discharge valve assembly arranged in the downward extension of stirring drum cavity bottom, feed joint installed in the middle part of horizontal stirring drum top and extending upward, pneumatic butterfly valve vertically installed on the feed joint, multiple function interfaces arranged on the top of horizontal stirring drum. The utility model is used with new solvent, can mix, stir, regenerate and dissolve the waste cotton textile that is crushed and carded into flocculent fiber according to the required temperature, makes cellulose fully dissolved to obtain the spinning glue liquid of regenerated cellulose fiber, greatly reduces the consumption of textile raw material, reduces the production cost, improves the utilization rate of waste cotton textile, and has the advantages of simple structure, low cost, controllable and reliable dissolution process, and light environmental pollution.

Description

Technical Field

[0001] This utility model relates to the technical field of recycling waste cotton textiles, specifically a device suitable for the regeneration and dissolution of waste cotton textiles. Background Technology

[0002] With rapid economic development and continuously improving living standards, people's demand for textiles is increasing, while their usage cycle is gradually shortening, resulting in a large amount of waste textiles. Therefore, it is necessary to improve the recycling rate of waste cotton textiles. This can not only eliminate the environmental pollution caused by incineration and landfilling of waste cotton textiles, but also further reduce the consumption of textile raw materials. Currently, common methods for recycling waste cotton textiles include physical and chemical methods, but both have certain drawbacks and shortcomings—physical methods suffer from low resource utilization, poor product quality, and secondary environmental pollution; chemical methods can, to some extent, compensate for the shortcomings of physical methods, but they also face challenges such as high technical difficulty and high production costs. Summary of the Invention

[0003] The purpose of this invention is to address the aforementioned shortcomings by providing a device suitable for the regeneration and dissolution of waste cotton textiles. By combining this invention with a new solvent, waste cotton textiles, after being pulverized and combed into flocculent fibers, can be mixed, stirred, and regenerated and dissolved under the required temperature conditions. This allows the cellulose in the waste cotton textiles to be fully dissolved, resulting in a spinning solution of regenerated cellulose fibers. This significantly reduces the consumption of textile raw materials, lowers production costs, and improves the utilization rate of waste cotton textiles. Furthermore, by eliminating the need for processing large quantities of waste cotton textiles, it greatly alleviates environmental pollution, providing technological support for sustainable development and ecological civilization construction. In addition, this invention has the advantages of simple structure, low cost, and a controllable and reliable dissolution process. It solves the problem of industrial-scale production of cellulose dissolution in waste cotton textile fibers using a new solvent method, and has significant potential for widespread application.

[0004] The objective of this utility model can be achieved through the following measures:

[0005] This utility model discloses a device for the recycling and dissolving of waste cotton textiles. It comprises a horizontally shaped mixing drum, formed by an inner and outer cylinder wall and two sealing flanges sealing both ends, creating a self-contained cavity. The horizontal mixing drum provides a working cavity for mixing, stirring, and recycling the waste cotton textiles; the cavity holds circulating hot water to ensure the solution within the mixing drum remains within the required recycling and dissolving temperature range, accelerating the dissolution of cellulose in the waste cotton textiles and promoting its complete dissolution. An agitator (composed of a motor, reducer, and coupling connected in sequence) is arranged along the center of the mixing drum's inner cavity. The power unit drives the agitator to rotate. Simultaneously, large and small spiral ribbon agitator blades rotate synchronously around the agitator shaft. After being mixed with new solvent, the waste cotton textiles in the inner cavity are mixed, stirred, and dissolved. A discharge valve assembly, located in the middle of the bottom of the mixing drum and extending downwards, discharges the adhesive formed after the cellulose in the waste cotton textiles is fully dissolved from the inner cavity of the horizontal mixing drum, allowing the adhesive to enter the next process. An inlet connector, installed in the middle of the top of the horizontal mixing drum and extending upwards, controls the pneumatic butterfly valve to open the inlet of the inlet connector, allowing the waste cotton textiles to pass through. The pulverized and combed flocculent fibers are added into the inner cavity of the horizontal mixing drum through the feed inlet of the feed connector. A pneumatic butterfly valve, vertically installed on the feed connector, controls the opening and closing of the feed inlet. Solvent inlet, inert gas inlet, local exhaust vent, pressure gauge port, lighting port, sight glass port, and manhole are located at the top of the horizontal mixing drum and distributed before and after the feed connector. (The solvent inlet is used to add solvent into the inner cavity of the horizontal mixing drum; the inert gas inlet is used to introduce inert gas into the inner cavity of the horizontal mixing drum as a protective gas to prevent oxidation during the stirring and dissolving process; the local exhaust vent allows air to be discharged during feeding and inert gas introduction.) The pressure gauge port is equipped with a pressure gauge to detect the air pressure inside the mixing drum; the lighting port and sight glass port are designed to facilitate observation of the mixing and dissolving process inside the drum; the manhole port allows maintenance personnel to enter and exit the drum for maintenance and repair. Two rows of rotating nozzles (used for rinsing the inside of the horizontal mixing drum) are arranged at intervals along the length of the left and right sides at a 15° angle to the central longitudinal section at the top of the horizontal mixing drum. Water inlet I is located on the lower left side of the sealing flange at the rear end, and water inlet II is located on the lower right side of the sealing flange at the front end. Water outlet I is located on the upper left half of the front end of the clamping cavity, and water outlet II is located on the upper right half of the rear end.The cavity thickness is 45-70mm. The cavity is divided into a lower left cavity, a lower right cavity, an upper left cavity, and an upper right cavity along the longitudinal center vertical and horizontal cross-sections. The partitions between the lower left and upper left cavities, and between the lower right and upper right cavities, have notches. Short guide plates are arranged at vertical intervals in the lower left and lower right cavities, while long vertical guide plates are arranged at horizontal intervals in the upper left and upper right cavities. Temperature measuring ports I and II are respectively provided in the lower left and lower right cavities (to inject circulating hot water at 50℃-70℃ into the cavity to preheat the inner wall of the horizontal stirring drum—one branch enters the lower left cavity from inlet I and follows the arrangement of the vertically spaced short guide plates in a "Z" pattern). One branch flows upwards in a "V" shape, segment by segment, until it enters the upper left cavity. Then, following the arrangement of vertically spaced long guide vanes, it flows backwards in an "N" shape, finally exiting from outlet I and entering the external heat circulation pipe for reheating and circulation. The other branch enters the lower right cavity from inlet II and flows upwards in a "Z" shape, segment by segment, following the arrangement of short guide vanes spaced vertically. Then, following the arrangement of vertically spaced long guide vanes, it flows backwards in an "N" shape, finally exiting from outlet II and entering the external heat circulation pipe for reheating and circulation. This ensures that the temperature-regulating water in the jacketed cavity flows along a predetermined path, evenly distributing the heat. The temperature of the inner wall and cavity of the horizontal stirring drum is uniformly adjusted to achieve the appropriate temperature required for the dissolved substance. Temperature measuring ports I and II are used to install bimetallic thermometers for real-time measurement of the temperature inside the horizontal stirring drum cavity. The stirrer is a horizontal double-layer spiral ribbon stirrer consisting of two sets of small and large spiral ribbon stirring blades arranged in opposite directions, layered internally and externally, and installed at the front and rear ends of the stirring shaft. This allows for both circumferential and axial stirring of the material—the small spiral ribbon stirring blades push the stirred material from the center to both ends, while the large spiral ribbon stirring blades push the stirred material from both ends to the center, forming a closed loop. The ring ensures that the materials are fully mixed and stirred evenly, making the entire dissolution process more uniform and rapid. This facilitates the full dissolution of cellulose in waste cotton textiles, thereby successfully obtaining the spinning sizing solution of regenerated cellulose fibers. This greatly reduces the consumption of textile raw materials, lowers production costs, and improves the utilization rate of waste cotton textiles. At the same time, it greatly alleviates environmental pollution by eliminating the need to process large quantities of waste cotton textiles. Both the front and rear ends of the stirring shaft are connected to bearings embedded in bearing seats. The front end of the stirring shaft is connected in sequence to the coupling, reducer, and motor (the motor, reducer, and coupling, connected in sequence, provide stirring power for the stirring shaft and the large and small spiral belt stirring blades).The discharge valve assembly includes an L-shaped valve body connected to the bottom of the mixing drum cavity, a valve core controlling the opening and closing of the discharge port, and a cylinder mounted on the valve body to drive the valve core to move up and down (when the material is being stirred and dissolved, the piston rod of the cylinder extends, causing the valve core to move upward, and the discharge port is closed; when the cellulose in the waste cotton textiles is fully dissolved and the spinning sizing solution of the regenerated cellulose fibers needs to be discharged, the piston rod of the cylinder retracts, causing the valve core to move downward, the discharge port is opened, and the spinning sizing solution of the regenerated cellulose fibers is discharged from the inner cavity of the horizontal mixing drum and enters the next process through the L-shaped valve body).

[0006] The large spiral ribbon stirring blade and the small spiral ribbon stirring blade described in this utility model rotate synchronously with the stirring shaft at a speed of 15-40 r / min (to dissolve the fiber evenly through uniform stirring, and at the same time assist in the discharge).

[0007] In this invention, there are two lighting ports and two sight glass ports, which are respectively arranged at the front and rear ends of the top of the stirring drum (to facilitate clear observation of the stirring and dissolution of materials at the front and rear ends of the inner cavity of the horizontal stirring drum).

[0008] In this invention, a stirring shaft through hole is provided in the center of the sealing flange, and an outwardly extending cylindrical protrusion is fixed in the center of the outer surface of the sealing flange (to provide an installation base and support base for the bearing seat). The bearing seat for mounting the bearing is fixed to the end face of the cylindrical protrusion by bolts.

[0009] The design principle of this utility model is as follows:

[0010] This invention, in conjunction with a novel solvent, enables the mixing, stirring, and regeneration dissolution of cellulose raw materials, such as pulverized and combed waste cotton textiles into flocculent fibers, within the inner cavity of a horizontal stirring drum at the desired temperature. This ensures the complete dissolution of cellulose in the waste cotton textiles, yielding a spinning solution for regenerated cellulose fibers. This significantly reduces the consumption of textile raw materials, lowers production costs, and increases the utilization rate of waste cotton textiles. Furthermore, by eliminating the need for large-scale processing of waste cotton textiles, it greatly alleviates environmental pollution, providing technological support for sustainable development and ecological civilization construction. It solves the industrial-scale problem of using a novel solvent method to dissolve cellulose in waste cotton textile fibers and has significant potential for widespread application. More specifically, the horizontal stirring drum designed in this invention provides a working inner cavity for mixing, stirring, and regenerating waste cotton textiles. This invention preheats the inner wall of a horizontal stirring drum by injecting circulating hot water at 50℃~70℃ into the cavity. One path involves the water entering the lower left cavity from inlet I and spreading upwards in a "Z" shape along the arrangement of short guide plates spaced vertically, until it enters the upper left cavity. Then, it spreads backwards in an "N" shape along the arrangement of long vertical guide plates spaced horizontally, finally flowing out from outlet I and entering the external heat circulation pipe for reheating and circulation. The other path involves the water entering the lower right cavity from inlet II and spreading upwards in a "Z" shape along the arrangement of short guide plates spaced vertically, until it enters the upper right cavity. Then, it spreads backwards in an "N" shape along the arrangement of long vertical guide plates spaced horizontally, finally flowing out from outlet II and entering the external heat circulation pipe for reheating and circulation. This ensures that the solution inside the horizontal stirring drum remains within the required regeneration and dissolution temperature range for waste cotton textiles, accelerating and promoting the complete dissolution of cellulose in the waste cotton textiles. It offers the advantages of a controllable and reliable dissolution process. This invention features multiple functional ports, enabling smooth material addition, solvent addition, protective gas addition, temperature testing, pressure testing, real-time monitoring, adhesive discharge, and internal cavity cleaning. It boasts advantages such as simple structure and ease of use.The agitator of this invention is a horizontal double-layer spiral ribbon agitator, consisting of two sets of small and large spiral ribbon agitators arranged in opposite directions, layered internally and externally, and installed at the front and rear ends of an agitator shaft. Driven by a power unit, the agitator rotates, simultaneously stirring the material circumferentially and axially. The small spiral ribbon agitators push the material from the center to both ends, while the large spiral ribbon agitators push it from both ends towards the center, forming a closed loop. This ensures thorough and uniform mixing of the material, making the entire dissolution process more uniform and rapid. This facilitates the complete dissolution of cellulose in waste cotton textiles, resulting in the successful production of regenerated cellulose fiber spinning solution. This significantly reduces the consumption of textile raw materials, lowers production costs, and increases the utilization rate of waste cotton textiles. Furthermore, by eliminating the need for processing large quantities of waste cotton textiles, it greatly alleviates environmental pollution.

[0011] The beneficial technical effects of this utility model are as follows:

[0012] By using this invention in conjunction with a new solvent, it is possible to mix, stir, and regenerate waste cotton textiles that have been pulverized and combed into flocculent fibers under the required temperature conditions. This allows the cellulose in the waste cotton textiles to be fully dissolved, resulting in a spinning solution for regenerated cellulose fibers. This significantly reduces the consumption of textile raw materials, lowers production costs, and improves the utilization rate of waste cotton textiles. Furthermore, by eliminating the need for processing large quantities of waste cotton textiles, it greatly alleviates environmental pollution, providing technological support for sustainable development and ecological civilization construction. In addition, this invention has the advantages of simple structure, low cost, and a controllable and reliable dissolution process. It solves the problem of industrial-scale production of cellulose dissolution in waste cotton textile fibers using a new solvent method, and has significant potential for widespread application. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural view of the present invention.

[0014] Figure 2 yes Figure 1 A cross-sectional view.

[0015] Part numbers in the diagram: 1. Horizontal mixing drum, 1-1. Inner cylinder wall, 1-2. Outer cylinder wall, 1-3. Clamping cavity, 1-3-1. Lower left cavity, 1-3-2. Lower right cavity, 1-3-3. Upper left cavity, 1-3-4. Upper right cavity, 1-4. Sealing flange, 1-4-1. Cylindrical protrusion, 1-5. Short guide plate, 1-5'. Vertical long guide plate, 1-6. Rotary nozzle; 2. Agitator, 2-1. Agitator shaft, 2-2. Large spiral ribbon agitator blade, 2-3. Small spiral ribbon agitator blade, 2-4. Coupling, 2-5. Reducer, 2-6. Motor, 2-7. Bearing housing; 3. Discharge valve assembly, 3-1. L-shaped valve body, 3-2. Cylinder, 3-3. Valve core, w. Discharge port; 4. Pneumatic butterfly valve; 5. Feed connector, r, feed port; p, solvent inlet; h, inert gas inlet; n, local exhaust vent; f, pressure gauge port; b, lighting port; c, sight glass port; t, manhole port; v1, water inlet I; v2, water inlet II; a1, water outlet I; a2, water outlet II; u1, temperature measuring port I; u2, temperature measuring port II. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] like Figure 1 , Figure 2As shown, the device for the recycling and dissolving of waste cotton textiles according to this utility model includes a horizontally shaped stirring drum 1, which is formed by an inner cylinder wall 1-1 and an outer cylinder wall 1-2 encircling each other and sealed at both ends by two sealing flanges 1-4, forming a self-contained clamping cavity 1-3. (The horizontally shaped stirring drum 1 provides a working inner cavity for mixing, stirring, and recycling the waste cotton textiles; the clamping cavity 1-3 is used to hold circulating hot water to ensure that the solution in the inner cavity of the horizontally shaped stirring drum 1 is always within the recycling and dissolving temperature range required for the waste cotton textiles, which can accelerate the dissolution of cellulose in the waste cotton textiles and promote the full dissolution of cellulose.) An agitator 2 is arranged along the center of the inner cavity of the stirring drum (a power assembly consisting of a motor 2-6, a reducer 2-5, and a coupling 2-4 connected in sequence to drive the agitator). The agitator 2 rotates, and simultaneously, the large spiral ribbon agitator blades 2-2 and the small spiral ribbon agitator blades 2-3 rotate synchronously around the agitator shaft 2-1. The large spiral ribbon agitator blades 2-2 and the small spiral ribbon agitator blades 2-3 also push the pulverized and combed fibrous waste cotton textiles that have entered the inner cavity of the horizontal mixing drum 1 to rotate together. After being mixed with new solvent, the waste cotton textiles in the inner cavity are mixed, stirred, and regenerated and dissolved. The discharge valve assembly 3, located in the middle of the bottom of the mixing drum cavity and extending downwards, discharges the adhesive solution formed after the cellulose in the waste cotton textiles is fully dissolved from the inner cavity of the horizontal mixing drum 1, allowing the adhesive solution to enter the next process. The top of the horizontal mixing drum is installed in the middle and extends upwards. The feed inlet 5 (which controls the pneumatic butterfly valve 4 to open the feed port r of the feed inlet 5, allowing the shredded and combed fibrous material from waste cotton textiles to be added into the inner cavity of the horizontal mixing drum 1 through the feed port r of the feed inlet 5) is vertically installed on the feed inlet 5. The pneumatic butterfly valve 4, located at the top of the horizontal mixing drum and distributed before and after the feed inlet 5, includes a solvent inlet p, an inert gas inlet h, a local exhaust vent n, a pressure gauge port f, a lighting port b, a sight glass port c, and a manhole t. The solvent inlet p is used to add solvent into the inner cavity of the horizontal mixing drum 1; the inert gas inlet h is used to introduce inert gas into the inner cavity of the horizontal mixing drum 1 as a protective gas to prevent oxidation during the mixing and dissolving process; the local exhaust vent n can be used for both feeding and ventilation. When inert gas is introduced, air is discharged; after the pressure gauge is installed in the pressure gauge port f, the air pressure in the inner cavity of the horizontal mixing drum 1 can be detected; the lighting port b and the sight glass port c are combined to facilitate observation of the stirring and dissolution in the inner cavity; the manhole port t facilitates maintenance personnel to enter and exit the inner cavity for maintenance and repair, etc.) Two rows of rotating nozzles 1-6 are arranged at intervals along the length of the left and right sides at an angle of 15° to the central longitudinal section of the top of the horizontal mixing drum (used to rinse the inner cavity of the horizontal mixing drum 1); the water inlet Iv1 is opened at the lower left of the sealing flange 1-4 at the rear end and the water inlet IIv2 is opened at the lower right of the sealing flange 1-4 at the front end; the water outlet Ia1 is opened at the upper left half of the front end of the clamping cavity 1-3 and the water outlet IIa2 is opened at the upper right half of the rear end.The cavity thickness of the clamping cavity 1-3 is 45-70mm. The clamping cavity 1-3 is divided into a lower left cavity 1-3-1, a lower right cavity 1-3-2, an upper left cavity 1-3-3, and an upper right cavity 1-3-4 along the longitudinal center vertical and horizontal cross-sections. The partitions between the lower left cavity 1-3-1 and the upper left cavity 1-3-3, and between the lower right cavity 1-3-2 and the upper right cavity 1-3-4, are notched. Short guide plates 1-5 are arranged in the lower left cavity 1-3-1 and the lower right cavity 1-3-2 at vertical intervals. Vertical long guide plates 1-5' are arranged at intervals in 1-3-3 and the upper right cavity 1-3-4. Temperature measuring ports Iu1 and IIu2 are respectively opened in the lower left cavity 1-3-1 and the lower right cavity 1-3-2 (50℃~70℃ circulating hot water is injected into the clamping cavity 1-3 to preheat the inner wall 1-1 of the horizontal stirring cylinder 1—one branch enters the lower left cavity 1-3-1 from the water inlet Iv1, and moves along the arrangement of the short guide plates 1-5 at intervals in a "Z" shape, one section at a time). The flow extends upwards until it enters the upper left cavity 1-3-3, then continues in an "N" shape along the arrangement of the vertically spaced long guide plates 1-5', finally flowing out from outlet Ia1 and entering the external heat circulation pipe for reheating and circulation; another branch enters the lower right cavity 1-3-2 from inlet IIv2, and then continues upwards in a "Z" shape along the arrangement of the vertically spaced short guide plates 1-5', until it enters the upper right cavity 1-3-4, then continues in an "N" shape along the arrangement of the vertically spaced short guide plates 1-5', finally flowing out from outlet Ia1 and entering the external heat circulation pipe for reheating and circulation; The vertically arranged guide plates 1-5' extend backward in an "N" shape, finally flowing out from outlet IIa2 and then entering the external hot circulation pipe for reheating and circulation. This allows the temperature-regulating water in the jacket 1-3 to flow along a predetermined path, uniformly adjusting the temperature of the inner wall 1-1 and the inner cavity of the horizontal stirring drum 1, thereby achieving the appropriate temperature required for the dissolved substance. Temperature measuring ports Iu1 and IIu2 are used to install bimetallic thermometers for real-time measurement of the temperature inside the horizontal stirring drum 1.The agitator 2 is a horizontal double-layer spiral ribbon agitator consisting of two sets of small spiral ribbon agitator blades 2-3 and large spiral ribbon agitator blades 2-2 arranged in opposite directions, layered internally and externally, and respectively installed at the front and rear ends of the agitator shaft 2-1. This agitator performs circumferential agitation on one hand and axial agitation on the other—the small spiral ribbon agitator blades 2-3 push the material being agitated from the center to both ends, while the large spiral ribbon agitator blades 2-2 push the material being agitated from both ends to the center, forming a closed loop. This ensures that the material is fully mixed and uniformly agitated, making the entire dissolution process more uniform and rapid. This facilitates the full dissolution of cellulose in waste cotton textiles, thus successfully obtaining the spinning sizing solution for regenerated cellulose fibers. This significantly reduces the consumption of textile raw materials, lowers production costs, and increases the utilization rate of waste cotton textiles. It also greatly alleviates environmental pollution by eliminating the need for processing large quantities of waste cotton textiles. The front and rear ends of the agitator shaft 2-1 are both connected to the shaft embedded in the bearing housing 2-7. The mixing shaft 2-1 is connected to the coupling 2-4, reducer 2-5, and motor 2-6 in sequence (the sequential connection of motor 2-6, reducer 2-5, and coupling 2-4 provides mixing power for the mixing shaft 2-1, the large spiral ribbon mixing blade 2-2, and the small spiral ribbon mixing blade 2-3); the discharge valve assembly 3 includes an L-shaped valve body 3-1 communicating with the bottom of the mixing cylinder cavity, a valve core 3-3 controlling the opening and closing of the discharge port w, and a valve core 3-3 mounted on the valve body to drive the valve body to move up and down. Cylinder 3-2 (when stirring and dissolving materials, the piston rod of cylinder 3-2 extends, causing valve core 3-3 to move upward, and the discharge port w is closed; when the cellulose in waste cotton textiles is fully dissolved and the spinning sizing solution of regenerated cellulose fibers needs to be discharged, cylinder 3-2 contracts, causing valve core 3-3 to move downward, opening the discharge port w, and the spinning sizing solution of regenerated cellulose fibers is discharged from the inner cavity of the horizontal stirring drum 1 and enters the next process through L-shaped valve body 3-1).

[0018] In this invention, the large spiral ribbon stirring blade 2-2 and the small spiral ribbon stirring blade 2-3 rotate synchronously with the stirring shaft 2-1 at a speed of 15-40 r / min (to dissolve the fiber evenly through uniform stirring and to assist in material discharge).

[0019] In this invention, there are two lighting ports b and two sight glass ports c, which are respectively arranged at the front and rear ends of the top of the stirring drum (to facilitate clear observation of the stirring and dissolution of materials at the front and rear ends of the inner cavity of the horizontal stirring drum 1).

[0020] In this utility model, a stirring shaft through hole is provided in the center of the sealing flange 1-4, and an outwardly extending cylindrical protrusion 1-4-1 (providing an installation base and support base for the bearing seat 2-7) is fixed in the center of the outer surface of the sealing flange 1-4. The bearing seat 2-7 for mounting the bearing is fixed to the end face of the cylindrical protrusion 1-4-1 by bolts.

[0021] The specific usage of this utility model is as follows:

[0022] First, the piston rod of the control cylinder 3-2 extends, causing the valve core 3-3 to move upward and close the discharge port w.

[0023] Next, circulating hot water at 50℃~70℃ is injected into the jacket cavity 1-3 to preheat the inner wall 1-1 of the horizontal stirring drum 1. One branch enters the lower left cavity 1-3-1 from the inlet Ⅰv1 and spreads upward in a "Z" shape along the arrangement of the short guide plates 1-5 spaced vertically, until it enters the upper left cavity 1-3-3. Then, it spreads backward in an "N" shape along the arrangement of the long vertical guide plates 1-5' spaced vertically, finally exiting from the outlet Ⅰa1. One branch flows out and then enters the external heat circulation pipe for reheating and circulation; the other branch enters the lower right cavity 1-3-2 from the inlet Ⅱv2, and spreads upward in a "Z" shape along the arrangement of the short guide plates 1-5 set at intervals, until it enters the upper right cavity 1-3-4, and then spreads backward in an "N" shape along the arrangement of the vertical long guide plates 1-5' set at intervals, and finally flows out from the outlet Ⅱa2, and then enters the external heat circulation pipe for reheating and circulation.

[0024] Then, the motor 2-6 is started. The motor 2-6 drives the stirring shaft 2-1 to rotate at a speed of 15-40 r / min through the reducer 2-5 and coupling 2-4. The stirring shaft 2-1 then drives the large spiral ribbon stirring blade 2-2 and the small spiral ribbon stirring blade 2-3 to rotate synchronously. At the same time, the cellulose raw materials such as waste cotton textiles that have been crushed and combed into flocculent fibers, along with solvent A and solvent B in a certain proportion and concentration, are weighed and added to the inner cavity of the horizontal stirring drum 1. That is, on the one hand, the pneumatic butterfly valve 4 is controlled to open the feed port r of the feed connector 5, and the flocculent fibers of the waste cotton textiles that have been crushed and combed are added into the inner cavity of the horizontal stirring drum 1 from the feed port r. Then, the pneumatic butterfly valve 4 is controlled to close the feed port r. On the other hand, solvent A and solvent B are added into the inner cavity of the horizontal stirring drum 1 from the solvent inlet p. After the addition is completed, the solvent inlet p is closed. In addition, it is also necessary to simultaneously open the inert gas inlet h to introduce inert gas into the inner cavity of the horizontal stirring tank 1 as a protective gas to prevent oxidation during the stirring and dissolving process; open the local exhaust port n and use the pressure gauge embedded in the pressure gauge port f to adjust the gas pressure in the inner cavity of the horizontal stirring tank 1 to the required range; use the lighting port b and the sight glass port c to facilitate observation of the stirring and dissolving process in the inner cavity of the horizontal stirring tank 1; use the bimetallic thermometers embedded in the temperature measuring ports Iu1 and IIu2 to measure the temperature in the inner cavity of the horizontal stirring tank 1 in real time; use the lighting port b and the sight glass port c to clearly observe the stirring and dissolving process of the material at the front and rear ends of the inner cavity of the horizontal stirring tank 1. Once the materials and solvent are added, the stirring shaft 2-1 drives the large spiral ribbon stirring blade 2-2 and the small spiral ribbon stirring blade 2-3 to rotate synchronously. After being mixed with the new solvent, they mix, stir, and regenerate the waste cotton textiles in the inner cavity. On the one hand, the materials are stirred circumferentially, and on the other hand, they are stirred axially. That is, the small spiral ribbon stirring blade 2-3 pushes the stirred materials from the center to both ends, while the large spiral ribbon stirring blade 2-2 pushes the stirred materials from both ends to the center, forming a closed loop. This ensures that the materials are fully mixed and stirred evenly, making the entire dissolution process more uniform and rapid. This facilitates the full dissolution of cellulose in the waste cotton textiles, thus successfully obtaining the spinning sizing solution of regenerated cellulose fibers. This greatly reduces the consumption of textile raw materials, lowers production costs, and improves the utilization rate of waste cotton textiles. At the same time, it greatly alleviates environmental pollution by eliminating the need to process large quantities of waste cotton textiles.

[0025] Subsequently, when the cellulose in the waste cotton textiles is fully dissolved and the spinning solution of the regenerated cellulose fibers needs to be discharged, the control cylinder 3-2 contracts. When the cylinder 3-2 contracts, it drives the valve core 3-3 to move downward, and the discharge port w is opened. The spinning solution of the regenerated cellulose fibers is discharged from the inner cavity of the horizontal stirring drum 1 and enters the next process through the L-shaped valve body 3-1.

[0026] Finally, after the adhesive liquid has been discharged, close the discharge port w and open two rows of rotating nozzles 1-6 arranged at intervals on the left and right sides of the top of the horizontal mixing drum at a 15° angle to the central longitudinal section to clean the inner cavity of the horizontal mixing drum 1 in preparation for the dissolution of the next batch of materials.

Claims

1. A device suitable for the recycling and dissolving of waste cotton textiles, characterized in that: The equipment includes a horizontally shaped mixing drum (1) with an oval overall shape, formed by an inner cylinder wall (1-1) and an outer cylinder wall (1-2) enclosing both ends and sealed by two sealing flanges (1-4), a stirrer (2) arranged in the center of the inner cavity of the mixing drum, a discharge valve assembly (3) arranged in the middle of the bottom of the mixing drum cavity and extending downward, a feed connector (5) installed in the middle of the top of the horizontal mixing drum and extending upward, a pneumatic butterfly valve (4) vertically installed on the feed connector (5) for controlling the opening and closing of the feed port (r), and solvent inlet (p), inert gas inlet (h), local exhaust port (n), and pressure gauge port (f) located at the top of the horizontal mixing drum and distributed in front of and behind the feed connector (5). The horizontal mixing drum has a lighting port (b), a sight glass port (c), and a manhole port (t). Two rows of rotating nozzles (1-6) are arranged at intervals along the length of the left and right sides at a 15° angle to the central longitudinal section. Water inlet I (v1) is located to the lower left of the rear sealing flange (1-4), and water inlet II (v2) is located to the lower right of the front sealing flange (1-4). Water outlet I (a1) is located in the upper left half of the front end of the clamping cavity (1-3), and water outlet II (a2) is located in the upper right half of the rear end. The clamping cavity (1-3) has a thickness of 45-70 mm. The clamping cavity (1-3) is divided into a lower left cavity (1-3-) along the longitudinal central vertical section and the longitudinal central horizontal section. 1) The lower right chamber (1-3-2), upper left chamber (1-3-3), and upper right chamber (1-3-4) are respectively. The partitions between the lower left chamber (1-3-1) and the upper left chamber (1-3-3), and between the lower right chamber (1-3-2) and the upper right chamber (1-3-4) are all notched. Short guide plates (1-5) are arranged in the lower left chamber (1-3-1) and the lower right chamber (1-3-2) in an up-down interval. Long vertical guide plates (1-5') are arranged in the upper left chamber (1-3-3) and the upper right chamber (1-3-4) in a back-to-back interval. Temperature measuring port I (u1) and temperature measuring port II (u2) are respectively opened in the lower left chamber (1-3-1) and the lower right chamber (1-3-2); the stirrer (2) is A horizontal double-layer spiral ribbon agitator is formed by assembling two sets of small spiral ribbon agitator blades (2-3) and large spiral ribbon agitator blades (2-2) with opposite rotation directions, which are layered internally and arranged in opposite directions and respectively installed on the front and rear ends of the agitator shaft (2-1). The front and rear ends of the agitator shaft (2-1) are connected to bearings embedded in bearing seats (2-7), and the front end of the agitator shaft (2-1) is connected to the coupling (2-4), the reducer (2-5), and the motor (2-6) in sequence. The discharge valve assembly (3) includes an L-shaped valve body (3-1) that connects to the bottom of the agitator chamber, a valve core (3-3) that controls the opening and closing of the discharge port (w), and a cylinder (3-2) installed on the valve body to drive the valve core (3-3) to move up and down.

2. The equipment for the recycling and dissolving of waste cotton textiles according to claim 1, characterized in that: The large spiral ribbon impeller (2-2) and the small spiral ribbon impeller (2-3) rotate synchronously with the stirring shaft (2-1) at a speed of 15-40 r / min.

3. The equipment for the recycling and dissolving of waste cotton textiles according to claim 1, characterized in that: There are two of each of the illumination port (b) and sight glass port (c), which are respectively arranged at the front and rear ends of the top of the stirring tank.

4. The equipment for the recycling and dissolving of waste cotton textiles according to claim 1, characterized in that: A stirring shaft through hole is provided in the center of the sealing flange (1-4). A cylindrical protrusion (1-4-1) extending outward is fixed in the center of the outer surface of the sealing flange (1-4). The bearing seat (2-7) for mounting the bearing is fixed to the end face of the cylindrical protrusion (1-4-1) by bolts.

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