CN108315826B

CN108315826B - Filtration regeneration system of old and useless non-woven fabrics

Info

Publication number: CN108315826B
Application number: CN201711470178.2A
Authority: CN
Inventors: 张青海; 曾飞虎
Original assignee: Liming Vocational University
Current assignee: Liming Vocational University
Priority date: 2017-12-29
Filing date: 2017-12-29
Publication date: 2021-06-01
Anticipated expiration: 2037-12-29
Also published as: CN108315826A

Abstract

The invention relates to a filtering and regenerating system of waste non-woven fabrics, which comprises a filtering component and a material conveying component, wherein the filtering component comprises a shell, a top cover is arranged on the shell, a primary filtering section and a fine filtering section are sequentially arranged in the inner cavity of the shell, a conical panel with a first communicating pore is arranged between the top cover and the primary filtering section, a partition plate is arranged between the primary filtering section and the fine filtering section, the partition plate is formed by overlapping a partition net and a waveform partition plate from top to bottom, a second communicating pore is arranged on the waveform partition plate, a partition net pore is arranged on the partition net, a bottom sealing plate formed by overlapping a bottom net with a third communicating pore and a bottom plate is arranged at the bottom, the third communicating pore is formed by connecting a conical guide hole and a through hole, the material conveying component comprises a material conveying bin, a material conveying screw rod and a driving motor, the upper port of the material conveying bin is connected with the lower port of, the inner cavity of the material conveying bin is provided with a horizontally placed material conveying screw rod, and one end of the material conveying screw rod is connected with a driving motor.

Description

Filtration regeneration system of old and useless non-woven fabrics

Technical Field

The invention relates to the technical field of chemical fiber preparation, in particular to a filtering and regenerating system for waste non-woven fabric.

Background

As is well known, China is a large country in textile industry and a large country in textile consumption, and the quantity of waste textiles in China is as high as thousands of tons every year. The terylene is a stable polymer generated by polymerizing terephthalic acid and ethylene glycol, has highly symmetrical molecular structure and certain crystal orientation capability, has higher film-forming property and formation property and non-degradability, and is widely applied to the fields of packaging, spinning, electronic and electric appliance shells and the like, so that the terylene fabric occupies a considerable proportion in waste textiles, but the existing terylene waste materials are almost buried and burned as garbage to damage the environment, and the reutilization rate is extremely low. The production of polypropylene fibers is roughly divided into two types, wherein one of the two types is prepared by polymerizing propylene as a raw material, modifying the raw material, melt spinning, spinning melt filtering, air-blowing cooling and winding, but the produced polypropylene fibers have low strength; the other method is to adopt polypropylene resin as a raw material, form the polypropylene resin by spinning, and then carry out two-stage traction and twisting on a spindle type traction twisting machine to prepare the high-strength polypropylene filament. At present, part of manufacturers produce polypropylene fibers by recycling waste PP plastics, and the production process comprises the production procedures of producing the polypropylene fibers by using the waste PP: regenerating particles, batching, stirring, drying, feeding, screw melting, filtering, spinning, cooling, oiling, drafting, winding, grading and packaging. Therefore, when the waste PP plastics are used for producing the polypropylene yarns at present, the waste PP plastics are required to be processed into the regenerated particles for producing the polypropylene yarns, and then the regenerated particles are processed into the polypropylene yarns, so that the production procedures are more complicated.

Because terephthalic acid and propylene are both required to be refined and processed from petroleum, which belongs to non-renewable precious resources, the finished products use new PET materials and PP materials, have higher manufacturing cost, and are not beneficial to energy conservation. Therefore, how to make the waste polyester fabrics and polypropylene fabrics be recycled through a reasonable and effective method becomes a problem which is to be solved urgently before people, and equipment or a technical process which can recycle the waste fabrics and then reprocess the waste fabrics is urgently needed.

At present, the PET polyester substance is utilized domestically to have nondegradable property, the prior art that PET can be recycled is developed, for example, a PET spun-bonded hot-rolled non-woven fabric process is utilized, but the processing and recycling technology of the PET substance at present still needs to be developed and improved. Wherein:

the invention patent with publication number CN 102605455B provides a method for producing terylene FDY filament yarn in large scale by recycling PET bottle sheet, the recycled PET bottle is crushed into sheets, cleaned and dried, then the sheets are sent into a crystallization bed body for crystallization and drying, the dried bottle sheet enters a screw extruder for melt extrusion, the filtered melt enters a homogenizing kettle for polycondensation reaction for 1.4 to 1.5 hours, the melt is homogenized in the homogenizing kettle, the homogenized melt enters a spinning box, and the terylene FDY filament yarn is prepared by adopting a high-speed spinning process. The production method adds a homogenization step, solves the problems of large viscosity fluctuation and poor stability of the melt of the polyester bottle flakes, and realizes the continuous and large-scale production of the terylene FDY filament products by taking the recovered PET bottle flakes as raw materials.

The invention patent with publication number CN 105177743A provides a method for producing fine denier and micro-fine denier flat regenerated polyester filaments by using regenerated polyester bottle chips, which comprises the following steps: 1) pretreating the recycled waste recycled polyester bottles to obtain polyester bottle chips; 2) carrying out low-temperature vacuum drying treatment on the pretreated polyester bottle chips; 3) and sequentially carrying out screw melt extrusion, primary filtration, liquid phase viscosity regulation homopolymerization kettle, secondary filtration, metering pump, spinning box body, spinning assembly, circular blowing cooling, bundling oiling, drafting shaping and winding doffing on the dried polyester bottle chips to obtain the finished product.

The invention patent with publication number CN 105525375A provides a method for preparing polyester staple fiber from waste polyester fiber, which comprises the steps of firstly introducing recycled polyester waste cloth, polyester waste fiber or polyester waste pulp into a crusher, introducing into a compaction device for dewatering and compacting after crushing to obtain dry polyester waste with the water content of less than 200PPm, then feeding the dry polyester waste into a screw extruder for melt extrusion, simultaneously vacuumizing to remove low molecular substances brought in the raw materials, filtering melt extruded by the screw extruder, introducing into a spinning box for melt spinning by a metering pump, cooling and solidifying filaments sprayed by a spinneret by circular air blowing, oiling the filaments, and collecting the filaments into tows and falling into a barrel to obtain nascent fiber; and (3) gathering the nascent fibers into tows through a gathering frame, guiding the tows into a drafting device through a yarn guide for drafting, taking the tows out of the drafting device to obtain drafted yarns, and finally curling, drying, loosening and shaping, cutting and packaging to obtain the finished product.

The invention patent with the publication number of CN 102154718B provides a direct spinning process of regenerated polypropylene, which comprises the following steps: a. Pretreatment: selecting waste PP plastics, shredding, carrying out flotation and cleaning, and dehydrating the cleaned waste PP plastics; b. production of polypropylene: measuring the dehydrated waste PP plastics in proportion, compacting, plasticizing, melting, vacuumizing by a vacuum pump, filtering by a filtering device, spinning the filtered waste PP plastics and cooling; c. and (3) post-treatment: the cooled filaments were oiled and drawn. The direct spinning process of the regenerated polypropylene fiber is simple in procedure, simultaneously reasonably utilizes the waste PP plastic, reduces the production cost and avoids the environmental pollution of the waste PP plastic.

However, in the prior art, waste polyester or waste polypropylene is used for cleaning, recrystallization and regeneration or a homogenizing kettle is used for adjusting the viscosity of the waste polyester to form a reclaimed material, and polyester fibers or polypropylene fibers are prepared, but the waste polyester or waste polypropylene contains or is adhered with a large amount of pollutants which are difficult to clean and remove, such as stains and even impurities, the pollutants affect the molecular weight and the distribution of polymers on one hand, so that the viscosity of a melt and the stability of the melt are affected, and on the other hand, the elongation at break, the breaking strength and the like of a fiber product after spinning can be caused.

Disclosure of Invention

The invention aims to overcome the defects in the existing technology for preparing fibers by recycling waste non-woven fabric reclaimed materials, and provides a filtering and regenerating system for waste non-woven fabrics.

The technical scheme adopted by the invention for solving the problems is as follows: the structure of the waste non-woven fabric filtering and regenerating system is characterized in that the waste non-woven fabric filtering and regenerating system comprises a filtering component and a material conveying component, the filtering component comprises a shell, a top cover with a feed inlet is arranged above the shell, the material conveying component is arranged below the shell, a primary filtering section and a fine filtering section are sequentially arranged in an inner cavity of the shell, coarse filtering sand and fine filtering sand are respectively arranged in the primary filtering section and the fine filtering section, a sealing panel is arranged between the top cover and the primary filtering section, the sealing panel is a conical panel with a certain gradient, a first communicating pore penetrating through the upper surface and the lower surface of the conical panel is arranged on the conical panel, and the first communicating pore is communicated with the primary filtering section.

According to the invention, a partition plate is arranged between a primary filtering section and a fine filtering section, the partition plate is formed by overlapping a partition net and a waveform partition plate from top to bottom, a second communicating pore which penetrates through the upper surface and the lower surface of the waveform partition plate is arranged on the waveform partition plate, a partition net pore is arranged on the partition net, and the pore is communicated with the fine filtering section through the second communicating pore;

the bottom of the fine filtering section is provided with a sealing bottom plate, the sealing bottom plate is formed by overlapping a bottom net and a bottom plate from top to bottom, a third communicating hole penetrating through the upper surface and the lower surface of the bottom plate is formed in the bottom plate, the third communicating hole is formed by connecting a conical guide hole with an upward opening at the upper part and a through hole at the lower part, the bottom net is provided with a bottom net hole, the bottom net hole is communicated with the third communicating hole, and the third communicating hole is communicated with an inner cavity of a material conveying bin.

The material conveying component comprises a material conveying bin, a material conveying screw rod and a driving motor, wherein an upper port of the material conveying bin is connected with a lower port of the shell, a material outlet is formed in the bottom of the material conveying bin, the material conveying screw rod which is horizontally placed is arranged in an inner cavity of the material conveying bin, and one end of the material conveying screw rod horizontally penetrates through the side face of the material conveying bin and is connected with the driving motor.

Preferably, the separation net is a stainless steel net with 20-200 meshes, and the bottom net is a metal non-woven fabric with 60-500 μm of pore size.

Preferably, the separation net is a polytetrafluoroethylene net with meshes of 20-200 meshes, and the bottom net is a polytetrafluoroethylene filter screen with the pore diameter of 60-500 mu m.

Preferably, the tapered panel, the corrugated partition plate and the bottom plate are all made of polytetrafluoroethylene resin plates, the aperture of the tapered panel is 100-1000 μm, the aperture of the corrugated partition plate is 80-800 μm, and the aperture of the bottom plate is 60-600 μm.

As a further preference, the cone panel, the corrugated partition plate and the bottom plate are all made of composite plates, the composite plates use stainless steel layers as substrate layers, and polytetrafluoroethylene layers are respectively arranged on the upper surface layers and the lower surface layers of the stainless steel layers.

More preferably, the coarse filter sand is metal sand with a particle size of 20-60 meshes, and the fine filter sand is metal sand with a particle size of 60-200 meshes.

Preferably, the material conveying screw is provided with a material conveying thread, and the pitch of the material conveying thread gradually narrows from width to width along the direction of the material outlet.

Preferably, the driving motor is a servo driving motor, and the servo driving motor adjusts the screw rotation speed of the material conveying screw to keep a linear relation with the screw rotation speed of the main screw melt extrusion system.

More preferably, the length-diameter ratio of the conveying screw is 1:4 to 1: 20.

The invention has the following beneficial effects: the invention can realize the recycling of the waste non-woven fabric, realize the energy-saving and environment-friendly production process and avoid the pollution to the environment caused by burying and burning the waste non-woven fabric; the invention carries out coarse filtration and fine filtration on the waste regenerated melt, ensures the filtration quality, has good filtration effect, reduces melt impurities, improves the uniformity and stability of melt viscosity, avoids the reduction or instability of melt viscosity caused by impurities, solves the problem of unfavorable spinning, and greatly improves the service cycle of a spinning assembly by using the filtration device. Meanwhile, the conveying screw of the filtering system is used for carrying out pre-homogenization treatment on the waste regenerated melt after filtering treatment, so that the mixing effect is greatly improved, the tensile strength of the fiber is ensured, and the quality of the regenerated fiber is improved. The invention can promote the regeneration and cyclic utilization of the waste non-woven fabric, improve the product quality, reduce the consumption of manpower and material resources, is beneficial to realizing the energy-saving and environment-friendly production process, effectively reduces the production cost, and has better economic benefit, social benefit and environment-friendly benefit.

Drawings

Fig. 1 is a schematic structural view of a waste nonwoven fabric filtration and regeneration system of the present invention.

Fig. 2 is a schematic view of the structure of the tapered plate of the present invention.

Fig. 3 is another schematic view of the construction of the tapered plate of the present invention.

Fig. 4 is a schematic structural view of the corrugated separator of the present invention.

Fig. 5 is a schematic structural view of the base plate of the present invention.

Fig. 6 is a block diagram showing a process of filtering and regenerating the waste nonwoven fabric of example 2.

FIG. 7 is a schematic view showing the construction of the filtration regeneration of the used nonwoven fabric of example 2.

Detailed Description

For a further understanding of the present invention, reference will now be made in detail to the accompanying drawings.

Example 1

As shown in fig. 1, the waste filtering system 1 includes a filtering component and a material transporting component, the filtering component includes a casing 3, a top cover 31 with a feeding port is disposed above the casing 3, the material transporting component is disposed below the casing 3, at least one primary filtering section 32 filled with coarse filtering sand 101 and at least one fine filtering section 33 filled with fine filtering sand 102 are sequentially disposed in an inner cavity of the casing 3, but in this embodiment, the primary filtering section 32 and the fine filtering section 33 are preferably disposed in the inner cavity of the casing 3, wherein a volume of the primary filtering section 32 is preferably 0.13-0.15m³The volume of the fine filter segment 33 is preferably 0.09 to 0.10m³。

As shown in fig. 1 and 2, a cover plate is disposed between the top cover 31 and the primary filtering section 32, the cover plate is a tapered plate 35 with a certain gradient, a first through hole 41 penetrating through the upper and lower surfaces of the tapered plate is disposed on the tapered plate 35, and the first through hole 41 is communicated with the primary filtering section 32. The conical surface plate 35 is used for effectively avoiding the direct impact of the waste melt on the coarse filter sand 101 at the central position when the waste melt enters the primary filter section 32, and simultaneously, the waste melt is uniformly diffused along the periphery of the conical surface plate 35 so as to stably and uniformly permeate the primary filter section 32. As a further preferred embodiment, as shown in fig. 3, the distribution density of the first communicating pores 41 may be gradually increased with the distance from the center of the cone top, with the cone top of the cone-shaped plate 35 as the center; when the height of the inlet end axis of the first communicating hole 41 from the cone bottom is one third of the total height of the cone plate 35, the first communicating hole 41 is provided with a cone guide hole 45 along the cone bottom direction.

As shown in fig. 1 and fig. 4, a partition plate is arranged between the primary filtering section 32 and the fine filtering section 33, the partition plate is formed by overlapping a partition net 36 and a waveform partition plate 37 from top to bottom, a second communicating pore 42 penetrating through the upper surface and the lower surface of the waveform partition plate 37 is arranged on the waveform partition plate 37, a partition net pore is arranged on the partition net 36, and the partition net pore is communicated with the fine filtering section 33 through the second communicating pore 42.

As shown in fig. 1 and 5, a bottom sealing plate is disposed at the bottom of the fine filtering section 33, the bottom sealing plate is formed by overlapping a bottom net 38 and a bottom plate 39 from top to bottom, a third communicating hole 43 penetrating through the upper and lower surfaces of the bottom plate 39 is disposed on the bottom plate 39, the third communicating hole 43 is formed by connecting a tapered guide hole 44 with an upward opening at the upper part and a through hole 46 at the lower part, the bottom net 38 is provided with a bottom net hole, the bottom net hole is communicated with the third communicating hole 43, and the third communicating hole 43 is communicated with the inner cavity of the material conveying bin 40.

As shown in the attached drawing 1, the material conveying component comprises a material conveying bin 40, a material conveying screw rod 52 and a driving motor 51, the upper end opening of the material conveying bin 40 is connected with the lower end opening of the shell in a sealing manner, a material outlet 54 is formed in the bottom of the material conveying bin 40, the material conveying screw rod 52 which is placed horizontally is arranged in the inner cavity of the material conveying bin 40, and one end of the material conveying screw rod 52 penetrates through the side face of the material conveying bin 40 horizontally and is connected with the driving motor 51.

Specifically, the screen 36 of the present embodiment is a stainless steel screen or a teflon screen with mesh openings of 20-200 meshes, preferably 40-60 meshes. The bottom net 38 is a metal non-woven fabric or polytetrafluoroethylene filter screen with the pore size of 60-500 μm, preferably a polytetrafluoroethylene filter screen with the pore size of 60-150 μm. In a further preferred embodiment, the partition net 36 and the bottom net 38 are each a composite partition net or a composite bottom net having a surface layer coated with polytetrafluoroethylene, which is formed by surface-treating a stainless steel net or a metal nonwoven fabric, and then impregnating the stainless steel net or the metal nonwoven fabric with a polytetrafluoroethylene emulsion and sintering the resultant.

Specifically, in this embodiment, the tapered panel 35, the corrugated partition 37, and the bottom plate 39 are all made of teflon resin, the aperture of the tapered panel 35 is 100-1000 μm, the aperture of the corrugated partition 37 is 80-800 μm, and the aperture of the bottom plate 39 is 60-600 μm. In some further preferred embodiments, the conical panel 35, the corrugated partition 37 and the bottom plate 39 may be made of stainless steel as a substrate layer, and the composite plate is formed by disposing polytetrafluoroethylene layers on the upper surface layer and the lower surface layer of the stainless steel layer, respectively.

Specifically, in this embodiment, the coarse filter sand 101 is metal sand with a particle size of 20-60 mesh, and the fine filter sand 102 is metal sand with a particle size of 60-200 mesh, and the metal sand may be irregular diamond metal sand.

Specifically, the feeding screw 52 of the present embodiment is provided with a feeding thread 53, the pitch of the feeding thread 53 gradually narrows from wide to narrow along the discharge port direction, but in some embodiments, the pitch does not change along the discharge port direction, and even gradually widens from narrow to wide, and the length-diameter ratio of the feeding screw is 1:4 to 1:20, preferably 1:6 to 1: 10.

Specifically, in this embodiment, the driving motor 51 is a servo driving motor, and the servo driving motor adjusts the screw rotation speed of the feeding screw 52 to keep a linear relationship with the screw rotation speed of the screw extruder 15.

In addition, in some embodiments, the outer layer of the waste filtering system 1 may be provided with an insulation material in the prior art for insulation, so as to keep the viscosity and fluidity of the melt stable.

Example 2

In the prior art, the components of the non-woven fabric are PP/PE or PET/PE, wherein PP or PET is used as a core layer material, PE is used as a skin layer material, and the PE is melted by a heat sealing process to generate bonding points. In the embodiment, the recycled waste PP/PE non-woven fabric or leftover materials generated in the production process of the PP/PE non-woven fabric are used as raw materials, and a waste regeneration melt is obtained through a regeneration treatment step.

As shown in fig. 1, fig. 6 and fig. 7, the present embodiment obtains a waste recycling melt by recycling waste nonwoven fabrics, and includes the following steps:

1) and (3) crushing: in this step, the waste nonwoven fabric crushing system 21 is a crusher, and the waste nonwoven fabric is crushed into a sheet-like fabric having a size of not more than 30mm × 30mm by using the crusher.

2) The pretreatment step comprises: separating dust, impurities and fine powder in the flaky cloth in the step (1) by using a thermal cyclone separator 22, then putting the flaky cloth into a cleaning process 23, respectively washing the flaky cloth with hot water at 60-80 ℃ in the cleaning process 23 to remove the impurities, and then treating the flaky cloth by using a vacuum drier 24 to obtain a flaky cloth pretreatment material for later use.

3) The feeding step comprises: in the step, the waste material feeding system 29 comprises a suction machine and a feeding hopper, and the sheet-like fabric pretreatment material obtained in the step (2) is conveyed into the feeding hopper through the suction machine, metered by the metering pump 25, subjected to pressurization treatment, and then enters the small screw extruder 26.

4) Heating and melting: the small screw extruder 26 heats and melts the sheet-shaped fabric pretreatment material to obtain a waste melt, and the vacuum extractor 30 vacuumizes and sucks out oil, water vapor and other volatile substances generated in the heating and melting process of the sheet-shaped fabric pretreatment material. The evacuation device 30 used in this step is a device that can be realized by a person skilled in the art, such as a vacuum pump.

5) And (3) melt filtration: and (3) conveying the waste melt prepared in the step (4) to a waste filtering system 1, reaching the conical panel 35 through a feed inlet arranged on the top cover 31, uniformly spreading the waste melt to the whole conical panel 35 under the action of the gradient of the conical panel 35, entering the primary filtering section 32 through the first communicating hole 41, and filtering impurities of the waste melt by using coarse filtering sand 101 filled in the primary filtering section 32.

Then, the waste melt reaches a partition plate consisting of a partition net 36 and a corrugated partition plate 37, and enters the fine filtering section 33 through the meshes of the partition net 36 and the second communicating holes 42 in sequence, and the fine filtering sand 102 filled in the fine filtering section 33 further filters impurities from the waste melt, so that the waste regenerated melt is obtained.

6) And (3) conveying the waste regeneration melt: and (5) conveying the waste regeneration melt to a discharge port 54 and then to a screw extruder 15 under the extrusion and shearing force effects of a conveying thread 53 after the waste regeneration melt reaches a sealing bottom plate consisting of a bottom net 38 and a bottom plate 39 and sequentially enters an inner bin of a conveying bin 40 through the hole of the bottom net 38 and a third communicating hole 43 and is driven by a driving motor 51 to rotate. For more precise control of the incorporation of the scrap regeneration melt, a fluid metering pump may be provided between the scrap filtration system 1 and the screw extruder 15.

In this example, the temperature parameters for setting the small screw extruder are shown in the following table:

a region	Two zones	Three zones	Four zones	Five zones
					180-210℃	210-225℃	225-235℃	235-250℃	250-265℃

In this embodiment, the temperature parameter of the waste filtration system is set to 240-265 ℃.

Although the present invention has been described with reference to specific embodiments, the scope of the present invention is not limited to the above-described embodiments, and various modifications, changes, and substitutions may be made without departing from the spirit of the present invention.

Claims

1. A filtering and regenerating system for waste non-woven fabrics is characterized in that:

the waste non-woven fabric filtering and regenerating system comprises a filtering component and a material conveying component, wherein the filtering component comprises a shell, a top cover with a feed inlet is arranged above the shell, the material conveying component is arranged below the shell, a primary filtering section and a fine filtering section are sequentially arranged in an inner cavity of the shell, coarse filtering sand and fine filtering sand are respectively arranged in the primary filtering section and the fine filtering section, a sealing panel is arranged between the top cover and the primary filtering section, the sealing panel is a conical panel with a certain gradient, a first communicating pore penetrating through the upper surface and the lower surface of the conical panel is arranged on the conical panel, and the first communicating pore is communicated with the primary filtering section;

the cone top of the cone panel is taken as a center, and the distribution density of the first communication pores is gradually increased along with the increase of the distance from the center of the cone top; when the height from the axle center of the inlet end of the first communicating pore to the cone bottom is one third of the total height of the conical plate, arranging a conical guide hole in the first communicating pore along the direction of the cone bottom;

a partition plate is arranged between the primary filtering section and the fine filtering section, the partition plate is formed by overlapping a partition net and a wave-shaped partition plate from top to bottom, second communication holes penetrating through the upper surface and the lower surface of the wave-shaped partition plate are formed in the wave-shaped partition plate, the partition net is a polytetrafluoroethylene net A with meshes of 20-200 meshes, and the polytetrafluoroethylene net A is communicated with the fine filtering section through the second communication holes;

a sealing bottom plate is arranged at the bottom of the fine filtering section, the sealing bottom plate is formed by overlapping a bottom net and a bottom plate from top to bottom, a third communicating hole penetrating through the upper surface and the lower surface of the bottom plate is arranged on the bottom plate, the third communicating hole is formed by connecting a conical guide hole with an upward opening at the upper part and a through hole at the lower part, the bottom net is a polytetrafluoroethylene filter screen B with the aperture of 60-500 mu m, the polytetrafluoroethylene filter screen B is communicated with the third communicating hole, and the third communicating hole is communicated with the inner cavity of the conveying bin;

the conveying component comprises a conveying bin, a conveying screw rod and a driving motor, an upper port of the conveying bin is connected with a lower port of the shell, a discharge port is formed in the bottom of the conveying bin, the conveying screw rod which is horizontally placed is arranged in an inner cavity of the conveying bin, and one end of the conveying screw rod horizontally penetrates through the side face of the conveying bin and is connected with the driving motor; the length-diameter ratio of the material conveying screw is 1:4 to 1: 20.

2. The system for filtering and regenerating waste non-woven fabric according to claim 1, characterized in that: the separation net is a stainless steel net with 20-200 meshes, and the bottom net is a metal non-woven fabric with the aperture of 60-500 mu m.

3. The system for filtering and regenerating waste non-woven fabric according to claim 1, characterized in that: the cone panel, the wave-shaped partition plate and the bottom plate are all made of polytetrafluoroethylene resin plates, the aperture of the cone panel is 100-1000 mu m, the aperture of the wave-shaped partition plate is 80-800 mu m, and the aperture of the bottom plate is 60-600 mu m.

4. The system for filtering and regenerating waste non-woven fabric according to claim 1, characterized in that: the composite board is selected from the conical panel, the corrugated partition board and the bottom board, the composite board uses a stainless steel layer as a base material layer, and a polytetrafluoroethylene layer is respectively arranged on the upper surface layer and the lower surface layer of the stainless steel layer.

5. The system for filtering and regenerating waste non-woven fabric according to any one of claims 1 to 4, characterized in that: the coarse filter sand is metal sand with the particle size of 20-60 meshes, and the fine filter sand is metal sand with the particle size of 60-200 meshes.

6. The system for filtering and regenerating waste non-woven fabric according to any one of claims 1 to 4, characterized in that: the material conveying screw is provided with a material conveying thread, and the pitch of the material conveying thread gradually narrows from width to width along the direction of the material outlet.