Device for preparing viscose fiber based on recycling of waste cotton fibers

Abstract

The utility model relates to the technical field of pulp preparation and viscose fiber preparation, specifically relates to a viscose fiber preparation device based on waste cotton fiber recycling, a viscose fiber preparation device based on waste cotton fiber recycling, which comprises pulping and pressing module, dissolving and yellowing module, ripening and filtering module and spinning module enclosed together, each module is connected in turn and forms the integrated system of diversified three -dimensional layout form, and the equipment in each module is rack-mounted and connected through pipeline, realizing three -dimensional layout integration. Through modular design and three -dimensional space optimization layout, a set of viscose fiber preparation device based on waste cotton fiber recycling is constructed, the recovery efficiency and stability of waste cotton fiber are significantly improved, forest resource consumption and carbon emission are reduced at the same time, and the device meets the green low carbon, energy saving and environmental protection and sustainable development direction of textile industry, and the system operation stability is significantly improved to provide reliable parameters for large -scale production.

Description

Technical Field

[0001] This utility model relates to the field of pulp preparation and viscose fiber preparation technology, specifically to a viscose fiber preparation device based on the recycling of waste cotton fibers. Background Technology

[0002] Traditional viscose fiber production relies primarily on natural cellulose pulps, such as wood and cotton linters, consuming vast amounts of forest and cotton linter resources. Simultaneously, large quantities of waste textiles end up in landfills or incineration, resulting in low recycling rates, resource waste, and environmental pollution. Existing technologies for preparing pulp and viscose fibers from waste cotton fibers suffer from problems such as complex equipment, high energy consumption, insufficient safety, lengthy process pipelines, and poor quality, making large-scale, stable production difficult. Furthermore, the current equipment layout is haphazard, with low space utilization, leading to inefficient material handling and increased energy consumption, thus limiting the promotion of a recycling economy model for waste cotton textiles within the textile industry. Utility Model Content

[0003] In view of the deficiencies of the prior art mentioned in the background, this utility model provides a viscose fiber preparation device based on the recycling of waste cotton fibers with modular design and three-dimensional spatial optimization layout.

[0004] To achieve the above technical objectives, the present invention adopts the following technical solution: a viscose fiber preparation device based on the recycling of waste cotton fibers, the device comprising a pulping and pressing module, a dissolving and yellowing module, a maturation and filtration module and a spinning module enclosed together; the modules are connected in sequence to form an integrated system with a diverse three-dimensional layout, and the equipment in each module is integrated in a three-dimensional layout through frame mounting and pipe connection.

[0005] As a preferred technical solution, the diverse three-dimensional layout forms include one or a combination of several of the following: semi-enclosed, straight, and U-shaped. As a preferred technical solution: the equipment in the pulping and pressing module is arranged in a three-dimensional staggered layout, specifically: pulping equipment, press, pressing tank, and impregnation tank are set in the first layer; a heating circulation machine and impregnation alkali metering tank are set in the second layer; and a raw liquid purification tank is set in the third layer; the raw liquid purification tank in the third layer is connected to the impregnation alkali metering tank in the second layer through a pipeline, and the heating circulation machine is connected to the impregnation alkali metering tank for auxiliary heating; the impregnation alkali metering tank is connected to the pressing tank in the first layer through a pipeline; a feeding port for adding waste cotton fibers is set above the impregnation tank in the first layer; a pulp pump is set on the pipeline between the impregnation tank and the press, and the material filtered by the press flows into the pressing tank by gravity through the pipeline.

[0006] As a preferred technical solution: the equipment in the dissolving and xanthation module adopts a two-layer layout, including a lower-layer xanthation machine, dissolving machine, homogenizer, and heating circulation machine, and an upper-layer cooling circulation machine, dissolving alkali metering tank, carbon disulfide metering tank, carbon disulfide storage tank, and water tank; the lower-layer xanthation machine is connected to the pressure tank in the impregnation module through a pipeline, and the heating circulation machine is connected to the xanthation machine for auxiliary heating; the xanthation machine is connected to the dissolving machine through a pipeline, and a viscose pump is installed on the pipeline; a homogenizer is installed on the pipeline at the output end of the dissolving machine; the upper-layer water tank is connected to the carbon disulfide storage tank through a pipeline, and the carbon disulfide storage tank is connected to the xanthation machine through a pipeline, and a carbon disulfide metering tank is installed on this section of the pipeline; the cooling circulation machine is connected to the dissolving alkali metering tank and the dissolving machine through circulation pipelines to achieve dispensing.

[0007] As a preferred technical solution: the maturation filtration module has a single-layer layout, including a first plate and frame filter press, maturation tank, basket filter, defoaming viscose pump, spinning drum, and a second plate and frame filter press; multiple maturation tanks are connected in parallel on the same platform, with the first maturation tank connected to the first plate and frame filter press via a pipeline, and the last maturation tank connected to the first plate and frame filter press via a pipeline; the dissolving and xanthation module has a dissolving machine connected to the first plate and frame filter press via a pipeline, and a basket filter and a defoaming viscose pump are installed on this pipeline; the second plate and frame filter press is connected to the spinning drum and deaeration tank sequentially via pipelines.

[0008] As a preferred technical solution: the spinning module is a single-layer double-row parallel layout, including a spinning machine, a drawing machine, a plasticizing bath and a hot water tank connected in sequence through pipes in the same row; it also includes a coagulation bath preparation tank, a coagulation bath acid return pump and a coagulation bath reflux tank connected in sequence through pipes in the other row; the degassing tank in the aging filtration module is connected to the spinning machine through a pipe; the coagulation bath acid return pump is installed on the pipe between the coagulation bath reflux tank and the coagulation bath preparation tank.

[0009] Compared with the prior art, the present invention, by adopting the above technical solution, has the following advantages: 1. Through modular design and three-dimensional spatial optimization layout, a viscose fiber preparation device for recycling waste cotton fiber was constructed, which significantly improved the recycling efficiency and stability of waste cotton fiber, while reducing forest resource consumption and carbon emissions, which is in line with the green, low-carbon, energy-saving, environmentally friendly and sustainable development direction of the textile industry. 2. By significantly improving the stability of system operation, reliable parameters (such as pulp soaking time, xanthation reaction temperature, spinning draw ratio, etc.) are provided for large-scale production. Attached Figure Description

[0010] Figure 1 : A schematic diagram of the overall three-dimensional layout of the test line system; Figure 2 Schematic diagram of the layered layout of the pulping and pressing module; Figure 3 : Schematic diagram of the layered layout of the dissolution and yellowing module; Figure 4 Layout diagram of parallel platform for mature filter modules; Figure 5 Schematic diagram of the spinning module layout.

[0011] In the diagram: 1. Pulping and pressing module; 2. Dissolving and xanthation module; 3. Maturation and filtration module; 4. Spinning module; 5. Press; 6. Liquid pressing tank; 7. Impregnation tank; 8. Heating and circulating machine; 9. Impregnation alkali metering tank; 10. Raw material and purified liquid tank; 11. Pulp pump; 12. Homogenizer; 13. Carbon disulfide storage tank; 14. Viscose pump; 15. Dissolving machine; 16. Heating and circulating machine; 17. Water tank; 18. Xanthation machine exhaust fan; 19. Cooling and circulating machine; 20. Dissolving alkali metering tank; 21. Carbon disulfide metering tank; 22. Xanthation machine; 23. Vacuum pump. 24. First-stage plate and frame filter press; 25. Vacuum pump; 26. Second-stage plate and frame filter press; 27. Deaeration viscose pump; 28. Basket filter; 29. ​​Spinning drum; 30. Maturation drum; 31. Deaeration tank; 32. Spinning machine; 33. Drawing machine; 34. Plasticizing bath tank; 35. Coagulation bath reflux tank; 36. Coagulation bath acid return pump; 37. Exhaust fan; 38. Coagulation bath mixing tank; 39. Hot water tank. Detailed Implementation

[0012] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0013] See appendix Figure 1-5 The pulp and viscose fiber preparation device based on the recycling of waste cotton fibers disclosed in this utility model includes a pulping and pressing module 1, a dissolving and xanthation module 2, a maturation and filtration module 3, and a spinning module 4, all enclosed together. These modules are sequentially connected to form an integrated system with a three-dimensional layout, such as semi-enclosed, linear, or U-shaped configurations. The equipment within each module is integrated through frame mounting and pipe connections, achieving a three-dimensional layout.

[0014] After the modules are connected, the waste cotton fiber is used as raw material through three-dimensional optimized layout and pipeline connection. The waste cotton fiber is pretreated, alkali impregnated and pressed through the pulping and pressing module to produce pulp; the cellulose xanthate is prepared through the dissolution and xanthation module; impurities are removed through the aging and filtration module; and finally, the recycled viscose fiber is obtained through coagulation bath molding, stretching and post-treatment in the spinning module.

[0015] As a preferred embodiment, the pulping and pressing module 1 is arranged in a three-layer three-dimensional layout. The first layer includes pulping equipment, a press 5, a pressing tank 6, and an impregnation tank 7; the second layer includes a heating circulation machine 8 and an impregnation alkali metering tank 9; and the third layer is equipped with a raw liquid purification tank 10.

[0016] The third-layer raw material purification tank 10 is connected to the second-layer impregnation alkali metering tank 9 via a pipeline. The heating circulation machine 8 is connected to the impregnation alkali metering tank 9 for auxiliary heating. The impregnation alkali metering tank 9 is connected to the first-layer pressure tank 6 via a pipeline. A feeding port for adding waste cotton fibers is provided above the first-layer impregnation tank 7. A slurry pump 11 is installed on the pipeline between the impregnation tank 7 and the press 5. The material filtered by the press 5 flows into the pressure tank 6 by gravity through the pipeline.

[0017] The material handling process is as follows: the pulping equipment produces wet cotton pulp from waste cotton fiber products, which enters through the feed port above the impregnation tank 7. After reacting with the impregnation alkali, it is transported by the pulp pump 11 to the press 5 for filtration, and then flows by gravity into the liquid pressing tank 6 to produce alkali cellulose. This module, through a three-dimensional staggered layout, reduces the length of the process pipeline by 38%.

[0018] In another preferred embodiment, the equipment in the dissolving and xanthation module 3 is arranged in a two-layer layout, including a lower-layer xanthation machine 22, a dissolving machine 15, a homogenizer 12, and a heating circulation machine 16, and an upper-layer cooling circulation machine 19, a dissolving alkali metering tank 20, a carbon disulfide metering tank 21, a carbon disulfide storage tank 13, and a water tank 17. The lower-layer xanthation machine 22 is connected to the pressure tank 6 in the impregnation module via a pipeline.

[0019] The alkali cellulose produced in the pulping and pressing module 1 is fed into the xanthating machine 22 and reacts with carbon disulfide under a certain temperature and vacuum to generate cellulose sulfonate. Dissolving alkali is added, and the resulting mixture is discharged into the dissolving machine 15 for stirring and temperature adjustment to achieve initial dissolution. After multiple grinding processes by the viscose pump 14 and homogenizer 12, a viscose solution is obtained and transported to the maturation and filtration module 3. A cooling circulation machine 19 is used to regulate the dissolving machine 15 and the dissolving alkali metering tank 20. A heating circulation machine 16 heats the xanthating machine 22 and adjusts its temperature. The xanthating machine 22 is used for the reaction of alkali cellulose with carbon disulfide and subsequent dissolution operations. The heating circulation machine 16 is connected to the xanthating machine 22 to heat the machine and adjust its internal temperature. A vacuum pump 23 is connected to the xanthating machine 22 to create a vacuum. Water in water tank 17 is pressurized into carbon disulfide storage tank 13, and the water pressurizes carbon disulfide into carbon disulfide metering tank 21. A certain amount of carbon disulfide is added into xanthating machine 22, and xanthating machine exhaust fan 18 is used to regulate the working pressure inside xanthating machine 22.

[0020] In another preferred embodiment, the aging and filtration module 3 has a single-layer layout, including a primary plate and frame filter press 24, a vacuum pump 25, a secondary plate and frame filter press 26, a degassing adhesive pump 27, a basket filter 28, a spinning drum 29, an aging drum 30, and a degassing tank 31. The dissolving and xanthation module's dissolving machine 15 is connected to the primary plate and frame filter press 24 via a pipeline.

[0021] Multiple maturation tanks are integrated in parallel on the same platform, working in conjunction with vacuum pump 25 and plate and frame filter press. The maturation filtration module 3 transports the dissolved viscose through a first plate and frame filter press 24, maturation tank 30, and a second plate and frame filter press 26 to the spinning drum 29 for spinning. This module uses a basket filter 28 to remove impurities and air bubbles from the viscose and, under controlled temperature, allows it to stand for a period of time to obtain viscose with acceptable viscosity, degree of maturation, methyl cellulose, and alkali content. A degassing viscose pump 27 then pumps this viscose into the spinning machine 31. Multiple maturation tanks 30 are centrally located on a dedicated platform, designed in parallel, and integrated with vacuum pump 25, first plate and frame filter press 24, second plate and frame filter press 26, and spinning drum 29, shortening the material transport path and reducing energy consumption.

[0022] As another preferred embodiment, the spinning module 4 is a single-layer double-row parallel layout, including a spinning machine 32, a drawing machine 33, a plasticizing bath 34 and a hot water tank 39 connected in sequence by pipes in the same row; it also includes a coagulation bath mixing tank 38, a coagulation bath acid return pump 36 and a coagulation bath reflux tank 35 connected in sequence by pipes in the other row.

[0023] The degassing tank 31 in the maturation filtration module is connected to the spinning machine 32 via a pipeline. The coagulation bath acid return pump 36 is installed on the pipeline between the coagulation bath reflux tank 35 and the coagulation bath mixing tank 38.

[0024] The process flow of the spinning module is from west to east (indicated by the arrows in the diagram). The coagulation bath reflux tank and the spinning machine are located on the north and south sides of the module, respectively. The spinning module 4 reacts the viscose obtained from the maturation and filtration module 3 through the spinning machine 32 to generate primary cellulose fibers. After passing through the drawing machine 33 and the plasticizing bath 34, the fibers are automatically wound into a yarn cake through the post-processing steps. The arrangement from west to east includes the spinning machine 32, the drawing machine 33, and the plasticizing bath 34 on the north side, and the coagulation bath reflux tank 35, the coagulation bath acid return pump 36, the coagulation bath mixing tank 38, the hot water tank 39, the exhaust fan 37, and other supporting equipment on the south side, achieving efficient connection between the spinning and post-processing steps.

[0025] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. For those skilled in the art, various modifications and variations can be made to the embodiments of the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A viscose fiber preparation device based on the recycling of waste cotton fibers, characterized in that: The device includes a pulping and pressing module, a dissolution and yellowing module, a maturation and filtration module, and a spinning module that are enclosed together. The modules are connected in sequence to form an integrated system with diverse three-dimensional layouts. The equipment in each module is integrated through rack mounting and pipeline connection to achieve a three-dimensional layout.

2. The viscose fiber preparation device based on the recycling of waste cotton fibers according to claim 1, characterized in that: The diverse three-dimensional layout forms include one or more combinations of semi-enclosed, linear, and U-shaped layouts.

3. The viscose fiber preparation device based on the recycling of waste cotton fibers according to claim 1, characterized in that: The equipment in the pulping and pressing module is arranged in a three-dimensional staggered layout, specifically: pulping equipment, press, pressing tank, and impregnation tank are set in the first layer; heating circulation machine and impregnation alkali metering tank are set in the second layer; and raw liquid purification tank is set in the third layer. The third-layer raw liquid purification tank is connected to the second-layer impregnation alkali metering tank via a pipeline. A heating circulation machine is connected to the impregnation alkali metering tank for auxiliary heating. The impregnation alkali metering tank is connected to the first-layer pressure tank via a pipeline. A feeding port for adding waste cotton fibers is set above the first-layer impregnation tank. A slurry pump is installed on the pipeline between the impregnation tank and the press. The material filtered by the press flows into the pressure tank by gravity through the pipeline.

4. The viscose fiber preparation device based on the recycling of waste cotton fibers according to claim 1, characterized in that: The equipment in the dissolving and xanthation module is arranged in a two-layer layout, including a xanthation machine, a dissolving machine, a homogenizer, and a heating circulation machine in the lower layer, and a cooling circulation machine, a dissolving alkali metering tank, a carbon disulfide metering tank, a carbon disulfide storage tank, and a water tank in the upper layer. The lower-level xanthation machine is connected to the pressure tank in the impregnation module via a pipeline. The heating circulation machine is connected to the xanthation machine for auxiliary heating. The xanthation machine is connected to the dissolving machine via a pipeline, and a viscose pump is installed on the pipeline. A homogenizer is installed on the pipeline at the output end of the dissolving machine. The upper water tank is connected to the carbon disulfide storage tank via a pipeline; the carbon disulfide storage tank is connected to the xanthation machine via a pipeline, and a carbon disulfide metering tank is installed on this pipeline; the cooling circulation machine is connected to the dissolving alkali metering tank and the dissolving machine via circulation pipelines to achieve mixing.

5. The viscose fiber preparation device based on the recycling of waste cotton fibers according to claim 1, characterized in that: The aging and filtration module has a single-layer layout, including a plate and frame filter press, a aging tank, a basket filter, a defoaming viscose pump, a spinning tank, and a second plate and frame filter press. Multiple maturation tanks are connected in parallel on the same platform. The first maturation tank is connected to a plate and frame filter press via a pipeline, and the last maturation tank is connected to a plate and frame filter press via a pipeline. The dissolving and xanthation module is connected to the first plate and frame filter press via a pipeline. A basket filter and a degassing adhesive pump are installed on the pipeline. The second plate and frame filter press is connected to the spinning drum and the degassing tank in sequence via pipelines.

6. The viscose fiber preparation device based on the recycling of waste cotton fibers according to claim 1, characterized in that: The spinning module is a single-layer double-row parallel layout, including a spinning machine, a drawing machine, a plasticizing bath and a hot water tank connected in sequence through pipes in the same row; it also includes a coagulation bath preparation tank, a coagulation bath acid return pump and a coagulation bath reflux tank connected in sequence through pipes in the other row. The degassing tank in the aging filtration module is connected to the spinning machine via a pipeline; The coagulation bath acid return pump is installed on the pipeline between the coagulation bath reflux tank and the coagulation bath mixing tank.

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