CN115140564A - Continuous production line for separating polyester cotton by alcoholysis method - Google Patents
Continuous production line for separating polyester cotton by alcoholysis method Download PDFInfo
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- CN115140564A CN115140564A CN202210522199.9A CN202210522199A CN115140564A CN 115140564 A CN115140564 A CN 115140564A CN 202210522199 A CN202210522199 A CN 202210522199A CN 115140564 A CN115140564 A CN 115140564A
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- 229920000742 Cotton Polymers 0.000 title claims abstract description 67
- 238000006136 alcoholysis reaction Methods 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000010924 continuous production Methods 0.000 title claims abstract description 20
- 229920000728 polyester Polymers 0.000 title claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 38
- 239000004744 fabric Substances 0.000 claims abstract description 33
- 239000007788 liquid Substances 0.000 claims description 43
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 35
- 238000006243 chemical reaction Methods 0.000 claims description 16
- 238000004064 recycling Methods 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 5
- 239000003638 chemical reducing agent Substances 0.000 claims description 4
- 230000036632 reaction speed Effects 0.000 claims description 4
- 230000009467 reduction Effects 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000004080 punching Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 238000004804 winding Methods 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims 1
- 238000011084 recovery Methods 0.000 description 8
- 239000002699 waste material Substances 0.000 description 7
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- 238000011001 backwashing Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 229920004933 Terylene® Polymers 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 239000005020 polyethylene terephthalate Substances 0.000 description 3
- QPKOBORKPHRBPS-UHFFFAOYSA-N bis(2-hydroxyethyl) terephthalate Chemical compound OCCOC(=O)C1=CC=C(C(=O)OCCO)C=C1 QPKOBORKPHRBPS-UHFFFAOYSA-N 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000543 intermediate Substances 0.000 description 1
- 238000007909 melt granulation Methods 0.000 description 1
- 238000002074 melt spinning Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical group C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G65/00—Loading or unloading
- B65G65/23—Devices for tilting and emptying of containers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
- B01D29/13—Supported filter elements
- B01D29/15—Supported filter elements arranged for inward flow filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0053—Details of the reactor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J4/00—Feed or outlet devices; Feed or outlet control devices
- B01J4/001—Feed or outlet devices as such, e.g. feeding tubes
- B01J4/007—Feed or outlet devices as such, e.g. feeding tubes provided with moving parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G33/00—Screw or rotary spiral conveyors
- B65G33/08—Screw or rotary spiral conveyors for fluent solid materials
- B65G33/14—Screw or rotary spiral conveyors for fluent solid materials comprising a screw or screws enclosed in a tubular housing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G33/00—Screw or rotary spiral conveyors
- B65G33/24—Details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G33/00—Screw or rotary spiral conveyors
- B65G33/24—Details
- B65G33/26—Screws
- B65G33/265—Screws with a continuous helical surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G65/00—Loading or unloading
- B65G65/30—Methods or devices for filling or emptying bunkers, hoppers, tanks, or like containers, of interest apart from their use in particular chemical or physical processes or their application in particular machines, e.g. not covered by a single other subclass
- B65G65/34—Emptying devices
- B65G65/40—Devices for emptying otherwise than from the top
- B65G65/46—Devices for emptying otherwise than from the top using screw conveyors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The invention discloses a continuous production line for separating polyester and cotton by an alcoholysis method, which comprises a screw feeder, wherein a single-screw alcoholysis device is connected with the screw feeder through a feed inlet at the upper part of the single-screw alcoholysis device; the 4 single-screw alcoholysis devices are connected in series through the material turning device, so that the time required by alcoholysis reaction is ensured, the first turning plate rotates 120 degrees anticlockwise to block the discharge hole of the screw, the second turning plate rotates 180 degrees clockwise to turn the cloth or cotton yarn in the material turning hopper over and send the cloth or cotton yarn to the discharge hole and fall into the next single-screw alcoholysis device, the second turning plate and the first turning plate both rotate to the original position, the discharge hole of the screw is opened, and the cloth or cotton yarn is sent to the material turning hopper again, so that the cloth or cotton yarn rotates alternately and repeatedly, and continuous production is realized.
Description
Technical Field
The invention relates to a continuous production line for separating polyester and cotton by an alcoholysis method, and belongs to the technical field of waste polyester and cotton garment recovery.
Background
At present, the recycling of waste polyester cotton clothes is mainly divided into a physical recycling method and a chemical recycling method.
The physical recovery method is that the waste polyester cotton clothes are crushed and then added into an extruder for melt granulation or spinning; the chemical recovery method is to depolymerize the macromolecular chains into polymeric monomers or intermediates using small molecule depolymerizers such as methanol, ethylene glycol. Physical recycling methods result in degradation of materials due to side reactions of the materials during melting, and a reduction in intrinsic viscosity and molecular weight, which leads to poor quality of the recycled product.
The chemical recovery method mainly comprises an ethylene glycol alcoholysis method, a methanol alcoholysis method and a hydrolysis method; the industrial device of the chemical recovery method is characterized in that waste terylene is put into a reaction tank, ethylene glycol and a catalyst are added, the heating is carried out under normal pressure, the waste terylene is cracked into BHET after reacting for 25 to 3 hours, the BHET in the reaction tank is emptied, and then the waste terylene is put into the reaction tank for carrying out the second alcoholysis, so that the production can be carried out only one tank by one tank, the continuous production can not be carried out, and the production efficiency is not high.
Disclosure of Invention
The invention provides a continuous production line for separating polyester and cotton by an alcoholysis method, which is used for overcoming the defect of low production efficiency caused by the fact that chemical recovery method industrial devices cannot be continuously produced in the prior art.
In order to solve the technical problems, the invention provides the following technical scheme:
the invention discloses a continuous production line for separating polyester and cotton by an alcoholysis method, which comprises a screw feeder, wherein a single-screw alcoholysis device is connected with the screw feeder through a feed inlet at the upper part of the single-screw alcoholysis device, the tail part of the single-screw alcoholysis device is connected with a material turning device, the lower end of the material turning device is connected with a cotton yarn extruding device, the lower part of the cotton yarn extruding device is connected with a liquid recycling box, and a circulating liquid filling device for accelerating alcoholysis reaction speed is also arranged outside the single-screw alcoholysis device.
Furthermore, the spiral feeding machine comprises a feeding cylinder, a hopper is arranged at the upper part of the feeding cylinder, a feeding screw is arranged in the feeding cylinder, a feeding speed reducer is connected with one end of the feeding screw, and the feeding screw is designed into a flat-bottom structure with long tooth space and large tooth depth.
Further, single screw rod alcoholysis device includes the frame, be equipped with reation kettle in the frame, reation kettle's inside is equipped with the screw rod, and its external connection has circulating liquid filling device, the one end and the mounted bearing of screw rod are connected, and the two passes through mechanical seal and seals, the mounted bearing passes through the coupling joint with gear motor.
Further, the reaction kettle is of a multilayer structure and comprises an inner cylinder, a jacket and a heat insulation layer from inside to outside, wherein a screw rod for stirring is arranged in the inner cylinder.
Further, the material turning device comprises a material turning hopper, a first turning plate and a second turning plate are respectively arranged in an inner cavity of the material turning hopper close to a feeding port of the material turning hopper, a first air cylinder and a second air cylinder are respectively arranged on the outer side wall of the material turning hopper, the output end of the first air cylinder is connected with a first rack, the first rack is in meshing transmission with a first gear, and the first turning plate is connected with the first rack through an open slot of the material turning hopper; the output end of the second cylinder is connected with a second rack, the second rack is in meshing transmission with a second gear, the second turning plate is connected with the second rack through an open slot of the turning hopper, and travel switches and time relays are arranged at the first rack and the second rack.
Furthermore, the first turning plate and the second turning plate are formed by welding punching plates and are provided with filter screens, the first turning plate and the second turning plate realize 120-degree anticlockwise rotation and 180-degree clockwise rotation through travel switches, and the time of the circulating action is controlled by a time relay.
Further, cotton yarn extrusion device includes the extrusion case, the both ends of extrusion case all are equipped with and are used for the extruded hydro-cylinder, and its below is equipped with the cotton yarn case, the hydro-cylinder communicates with the hydraulic pressure station.
Further, circulation liquid filling device includes the pump support, be equipped with the circulating pump on the pump support, the one end of circulating pump is passed through the liquid discharging pipe and is connected with the filter core, filter core and inner tube intercommunication, the other end pass through liquid inlet pipe and inner tube intercommunication.
Furthermore, the circulating liquid filling device has the function of fully contacting the cloth and the glycol, so that the alcoholysis reaction is accelerated, and the cloth or cotton yarns are prevented from winding the screw; the filter element has the function of blocking cloth or cotton yarn, and prevents the cloth or cotton yarn from entering the liquid discharge pipe or the circulating pump to cause blockage; the filter element is internally welded with a backwashing pipe, when the filter element is blocked by cloth or cotton yarn, the ethylene glycol backwashing device is started, and new high-temperature ethylene glycol is flushed outwards from the inside of the filter element to flush away the cloth or cotton yarn wrapped on the filter element, so that the filter element is unblocked.
The invention has the following beneficial effects: the 4 single-screw alcoholysis devices are connected in series through the turning device, so that the time required by alcoholysis reaction is ensured, the first turning plate rotates 120 degrees anticlockwise to block the discharge hole of the screw, the second turning plate rotates 180 degrees clockwise to turn the cloth or cotton yarn in the turning hopper over and send the cloth or cotton yarn to the discharge hole and fall into the next single-screw alcoholysis device, then the second turning plate and the first turning plate both rotate to the original position, the discharge hole of the screw is opened, and the cloth or cotton yarn is sent to the turning hopper again, so that the cloth or cotton yarn rotates alternately and repeatedly, and continuous production is realized.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of a separation production line of polyester-cotton by an alcoholysis method;
FIG. 2 is a schematic view of a single screw alcoholysis apparatus;
FIG. 3 is a schematic view of a circulating liquid filling apparatus;
FIG. 4 is a schematic structural view of a reaction kettle;
FIG. 5 is a schematic view of a screw feeder;
FIG. 6 is a first schematic view of a material turning device;
FIG. 7 is a second schematic view of the material turning device;
FIG. 8 is a schematic view of a cotton yarn pressing apparatus.
In the figure: 1. a screw feeder; 11. a feeding cylinder; 12. a feeding screw; 13. a feeding speed reducer; 14. a hopper; 2. a single screw alcoholysis unit; 21. a reduction motor; 22. a coupling; 23. a pedestal bearing; 24. mechanical sealing; 25. a screw; 3. a reaction kettle; 31. a heat-insulating layer; 32. a jacket; 33. an inner barrel; 4. a material turning device; 41. a first flap; 42. a second flap; 43. a material turning hopper; 44. a first cylinder; 45. a first gear; 46. a first rack; 47. a second cylinder; 48. a second gear; 49. a second rack; 410. a travel switch; 5. a cotton yarn extruding device; 51. extruding the box; 52. an oil cylinder; 53. a hydraulic station; 54. a cotton yarn box; 6. a liquid recovery tank; 7. a circulating liquid filling device; 71. a liquid feed conduit; 72. a liquid discharge pipe; 73. a filter element; 74. and a circulating pump.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it should be understood that they are presented herein only to illustrate and explain the present invention and not to limit the present invention.
Example 1
As shown in fig. 1-8, a continuous production line for separating polyester and cotton by an alcoholysis method comprises a screw feeder 1, a single-screw alcoholysis device 2 is connected with the screw feeder 1 through a feed inlet at the upper part of the single-screw alcoholysis device 2, the tail part of the single-screw alcoholysis device 2 is connected with a material turning device 4, the lower end of the material turning device 4 is connected with a cotton yarn extruding device 5, the lower part of the cotton yarn extruding device 5 is connected with a liquid recycling box 6, and a circulating liquid filling device 7 for accelerating alcoholysis reaction speed is also arranged outside the single-screw alcoholysis device 2.
The screw feeder 1 comprises a feeding cylinder 11, wherein a hopper 14 is arranged at the upper part of the feeding cylinder 11, a feeding screw 12 is arranged in the feeding cylinder, and a feeding speed reducer 13 is connected with one end of the feeding screw 12. The polyester cotton clothing material which is crushed into blocks and has the length or width less than or equal to 10cm is put into a hopper 14 of a spiral feeding machine 1, the spiral feeding machine 1 is started to convey the cloth into an inner cylinder 33 of a single-screw alcoholysis device 2, and the conveying amount of the cloth can be controlled by controlling the rotating speed of a feeding screw 12 through variable frequency speed regulation. In order to prevent the cloth from entangling the feeding screw 12, in order to have enough spiral groove volume and to form a 'material plug' near the feed opening, the feeding screw 12 is designed into a flat-bottom structure with long tooth space and large tooth depth.
The single-screw alcoholysis device 2 comprises a frame, wherein a reaction kettle 3 is arranged on the frame, a screw 25 is arranged in the reaction kettle 3, the exterior of the reaction kettle 3 is connected with a circulating liquid filling device 7, one end of the screw 25 is connected with a bearing with a seat 23, the screw and the bearing with the seat are sealed through a mechanical seal 24, and the bearing with the seat 23 is connected with a speed reducing motor 21 through a coupler 22.
The reaction kettle 3 is of a multilayer structure and comprises an inner cylinder 33, a jacket 32 and a heat insulation layer 31 from inside to outside, wherein a screw 25 for stirring is arranged in the inner cylinder 33.
The material turning device 4 comprises a material turning hopper 43, a first turning plate 41 and a second turning plate 42 are respectively arranged in the inner cavity of the material turning hopper 43 close to the feed inlet of the material turning hopper, a first air cylinder 44 and a second air cylinder 47 are respectively arranged on the outer side wall of the material turning hopper 43, the output end of the first air cylinder 44 is connected with a first rack 46, the first rack 46 is in meshing transmission with a first gear 45, the first turning plate 41 is connected with the first rack 46 through an open slot of the material turning hopper 43, the output end of the second air cylinder 47 is connected with a second rack 49, the second rack 49 is in meshing transmission with a second gear 48, the second turning plate 42 is connected with the second rack 49 through the open slot of the material turning hopper 43, and stroke switches 410 and time relays are respectively arranged at the first rack 46 and the second rack 49.
The reduction motor 21 is directly connected with the screw 25 through a coupling 22. The rotating speed of the screw 25 is controlled by frequency control, the forward conveying speed of the materials can be controlled, and the reaction time of the materials in the glycol solution is controlled. And a flange at the outlet of the single-screw alcoholysis device 2 is connected with a flange at the feed inlet of the stirring device 4. The glycol and the catalyst solution soak the cloth in the cylinder, the liquid level accounts for 70% -80% of the height of the inner cylinder 33, the liquid level height depends on the baffle plate in the material turning hopper 43, and the liquid higher than the baffle plate can overflow and flow into the next single-screw alcoholysis device 1. The first turning plate 41 and the second turning plate 42 are formed by welding punched plates and are respectively provided with a filter screen, liquid can pass through the first turning plate 41 and the second turning plate 42 when the first turning plate and the second turning plate move, and cloth or cotton yarn is blocked by the filter screens. The screw rod 25 rotates to feed forwards, the first turning plate 41 rotates 120 degrees anticlockwise, the first turning plate 41 is erected to block a discharge hole of the screw rod 25, the second turning plate 42 rotates 180 degrees clockwise, cloth or cotton yarns in the turning hopper 43 are turned over and conveyed to the discharge hole and fall into the next single-screw alcoholysis device 2, then the second turning plate 42 rotates to the original position, the first turning plate 41 rotates to the original position, the discharge hole of the screw rod 25 is opened, the cloth or cotton yarns are conveyed to the turning hopper 43 again, and therefore continuous production is achieved through repeated alternate rotation. The rotation action of the first turning plate 41 and the second turning plate 42 is realized by driving a first rack 46 and a second rack 49 to drive a first gear 45 and a second gear 48 to rotate by a first air cylinder 44 and a second air cylinder 47 which are matched with each other, the action amplitude of the first turning plate 41 and the second turning plate 42 is controlled by a travel switch 410, and the time of the cycle action is controlled by a time relay.
The cotton yarn squeezing device 5 comprises a squeezing box 51, oil cylinders 52 are arranged at two ends of the squeezing box 51, a cotton yarn box 54 is arranged below the squeezing box, and the oil cylinders 52 are communicated with a hydraulic station 53.
The circulating liquid filling device 7 comprises a pump support, a circulating pump 74 is arranged on the pump support, one end of the circulating pump 74 is connected with a filter element 73 through a liquid discharge pipe 72, the filter element 73 is communicated with an inner cylinder 33, the other end of the circulating pump is communicated with the inner cylinder 33 through a liquid feed pipe 71, and an ethylene glycol backwashing device is arranged in the filter element 73.
Three sets of circulating liquid filling devices 7 are connected to the inner cylinder 33 of the reaction kettle 3, and liquid in the inner cylinder 33 is sent to the liquid feeding pipe 71 by the circulating pump 74 through the filter element 73 and the liquid discharging pipe 72 and then enters the upper part of the inner cylinder 33, so that the liquid in the inner cylinder 33 is continuously circulated. The circulating liquid filling device 7 has the effects that the cloth can be fully contacted with the glycol, so that the alcoholysis reaction speed is accelerated; secondly, prevent the cloth or cotton yarn from tangling the screw 25. The conveying pipelines are all jacketed pipes, the inner layer conveys liquid after reaction, the jacket 32 is communicated with hot oil to heat the liquid in the inner pipe, and the outer pipe is wrapped by a heat-insulating layer 31. The filter element 73 is used for blocking cloth or cotton yarn and preventing the cloth or cotton yarn from entering the liquid discharge pipe 72 or the circulating pump 74 to cause blockage; the filter element 73 is internally welded with a backwashing pipe which is used for starting the ethylene glycol backwashing device when the filter element 9 is blocked by cloth or cotton yarn, so that new high-temperature ethylene glycol is flushed outwards from the inside of the filter element 73 to flush away the cloth or cotton yarn wrapped on the filter element 73, and the filter element 73 is unblocked.
The 4 single-screw alcoholysis devices 2 are connected in series through the material turning device 4, so that the time required by the alcoholysis reaction is ensured. After passing through the 4 th single-screw alcoholysis device 2, the waste polyester cotton cloth is subjected to complete alcoholysis, the rest cotton yarns are sent to a cotton yarn extruding device 5, liquid in the cotton yarns is extruded out, the extruded cotton yarns fall into a cotton yarn box 54, and the extruded liquid flows into a liquid recovery box 6.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The continuous production line for separating the polyester and the cotton by the alcoholysis method is characterized by comprising a spiral feeder, wherein a single-screw alcoholysis device is connected with the spiral feeder through a feed inlet at the upper part of the single-screw alcoholysis device, the tail part of the single-screw alcoholysis device is connected with a turning device, the lower end of the turning device is connected with a cotton yarn extruding device, the lower part of the cotton yarn extruding device is connected with a liquid recycling box, and a circulating liquid filling device for accelerating the alcoholysis reaction speed is also arranged outside the single-screw alcoholysis device.
2. The continuous production line for separating cotton and polyester by the alcoholysis process as claimed in claim 1, wherein the screw feeder comprises a feeding cylinder, the upper part of the feeding cylinder is provided with a hopper, the feeding cylinder is internally provided with a feeding screw, a feeding speed reducer is connected with one end of the feeding screw, and the feeding screw is designed to be a flat-bottomed structure with long space between teeth and large tooth depth.
3. The continuous production line for separating cotton and polyester by an alcoholysis process according to claim 1, wherein the single-screw alcoholysis device comprises a frame, a reaction kettle is arranged on the frame, a screw is arranged in the reaction kettle, a circulating liquid filling device is connected outside the reaction kettle, one end of the screw is connected with a bearing with a seat, the screw and the bearing with the seat are sealed by mechanical sealing, and the bearing with the seat is connected with a speed reduction motor by a coupler.
4. The continuous production line for separating polyester and cotton by an alcoholysis process as claimed in claim 3, wherein the reaction kettle is of a multilayer structure and comprises an inner cylinder, a jacket and a heat-insulating layer from inside to outside, and a screw for stirring is arranged in the inner cylinder.
5. The continuous production line for separating cotton and polyester by an alcoholysis process according to claim 1, wherein the material turning device comprises a material turning hopper, a first turning plate and a second turning plate are respectively arranged in an inner cavity of the material turning hopper close to a feed inlet of the material turning hopper, a first air cylinder and a second air cylinder are respectively arranged on an outer side wall of the material turning hopper, an output end of the first air cylinder is connected with a first rack, the first rack is in meshing transmission with a first gear, and the first turning plate is connected with the first rack through an open slot of the material turning hopper; the output end of the second cylinder is connected with a second rack, the second rack is in meshing transmission with a second gear, the second turning plate is connected with the second rack through an open slot of the turning hopper, and travel switches and time relays are arranged at the first rack and the second rack.
6. The continuous production line for separating polyester-cotton by an alcoholysis process according to claim 5, wherein the first turning plate and the second turning plate are formed by welding punching plates and are both provided with filter screens, the first turning plate and the second turning plate realize 120-degree anticlockwise rotation and 180-degree clockwise rotation through travel switches, and the time of the circulating action is controlled by a time relay.
7. The continuous production line for separating polyester and cotton by an alcoholysis method according to claim 1, characterized in that the cotton yarn extruding device comprises an extruding box, oil cylinders for extruding are arranged at two ends of the extruding box, a cotton yarn box is arranged below the extruding box, and the oil cylinders are communicated with a hydraulic station.
8. The continuous production line for separating polyester-cotton fibers by an alcoholysis method according to claim 1 is characterized in that the circulating liquid filling device comprises a pump support, a circulating pump is arranged on the pump support, one end of the circulating pump is connected with the filter element through a liquid discharging pipe, the filter element is communicated with the inner cylinder, and the other end of the circulating pump is communicated with the inner cylinder through a liquid feeding pipe.
9. The continuous production line for separating polyester and cotton through an alcoholysis process as claimed in claim 1, wherein the circulating liquid filling device has the function of fully contacting the cloth with ethylene glycol, accelerating the alcoholysis reaction and preventing the cloth or cotton yarns from winding around the screw; the filter element has the function of blocking cloth or cotton yarn, and prevents the cloth or cotton yarn from entering the liquid discharge pipe or the circulating pump to cause blockage; the inside of the filter element is also welded with a backwash pipe which is used for washing away the cloth or cotton yarns blocked at the filter element from the inside of the filter element to ensure that the filter element is smooth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN115140564B (en) | 2024-06-18 |
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