CN114798688A - Resource recycling system and process for waste liquid crystal panels - Google Patents
Resource recycling system and process for waste liquid crystal panels Download PDFInfo
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- CN114798688A CN114798688A CN202210429838.7A CN202210429838A CN114798688A CN 114798688 A CN114798688 A CN 114798688A CN 202210429838 A CN202210429838 A CN 202210429838A CN 114798688 A CN114798688 A CN 114798688A
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- 239000000428 dust Substances 0.000 claims abstract description 36
- 238000011084 recovery Methods 0.000 claims abstract description 29
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- 238000012545 processing Methods 0.000 claims description 21
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 15
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 14
- 238000004821 distillation Methods 0.000 claims description 12
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 claims description 10
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 claims description 10
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 9
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Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D11/00—Solvent extraction
- B01D11/02—Solvent extraction of solids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator
Abstract
The invention discloses a resource recycling system and a resource recycling process for waste liquid crystal panels, which comprise a first crushing system, a liquid crystal recycling system, a panel recycling system and a dust removing system which are sequentially arranged, wherein a first conveying system is arranged between the first crushing system and the liquid crystal recycling system, a second conveying system is arranged between the liquid crystal recycling system and the panel recycling system, the liquid crystal recycling system comprises liquid crystal extraction equipment and a liquid crystal recycling device arranged corresponding to the liquid crystal extraction equipment, the input end of the liquid crystal extraction equipment is arranged corresponding to the first conveying system, the first crushing system and the panel recycling system are both communicated with the dust removing system, and a liquid crystal extracting agent is arranged in the liquid crystal extraction equipment. The invention has the advantages of compact structure, stable performance and simple operation, realizes harmless and green recovery treatment of the waste liquid crystal panels, improves the recovery utilization efficiency of the waste liquid crystal panels, and reduces the production cost of the waste liquid crystal panels.
Description
Technical Field
The invention relates to the technical field of environmental protection and resource recovery, in particular to a resource recovery treatment system and process for waste liquid crystal panels.
Background
The liquid crystal display has the advantages of thin body, power saving, no high temperature, no radiation, soft picture and no harm to eyes, and is widely applied to terminal electronic display equipment such as desktop computer displays, liquid crystal televisions, notebook computers, mobile phones, tablet computers and the like. However, with the development of society, the social preservation quantity and the scrappage quantity of liquid crystal televisions in China increase year by year, and how to realize the recycling of waste liquid crystal panels is one of the current research hotspots. The components of the waste liquid crystal display are complex, the product quality is difficult to ensure by simple treatment at the present stage, the related domestic industries generally mainly adopt landfill or incineration, most resources cannot be reused, and only a small number of waste liquid crystal panels are recycled, so that the problems of environmental pollution and resource waste are caused greatly. The liquid crystal display mainly comprises a liquid crystal panel, a film set, a backlight module and the like. The liquid crystal panel is a core component and mainly comprises a polarizer, an upper glass substrate, liquid crystal, a lower glass substrate and the like.
Therefore, the key to recycling and treating the waste liquid crystal panel lies in how to effectively separate the polaroid, the glass substrate and the liquid crystal. For the liquid crystal panel, there have been reports, for example, the blumea and xujin balls use Sodium Dodecyl Sulfate (SDS) as a surfactant as a cleaning agent to successfully remove the liquid crystal in the waste liquid crystal panel, but waste water polluted by the surfactant will be generated; the juvenir and the like recover liquid crystal by using an ultrasonic-assisted and organic solvent soaking combined process, the recovery rate of the liquid crystal is only 50%, the purity of the recovered liquid crystal is low, and the recovered liquid crystal cannot meet the display application requirement; gaokong et al respectively utilize a heat precipitation method to remove liquid crystals in waste liquid crystal panels, but SO is generated after the heat precipitation method treatment 2 And acid gases such as HCl.
Disclosure of Invention
The invention aims to provide a resource recycling system and a resource recycling process for waste liquid crystal panels, which aim to solve the problems in the prior art.
In order to achieve the purpose, the invention provides the following scheme: the invention provides a waste liquid crystal panel resource recycling system which comprises a first crushing system, a liquid crystal recycling system, a panel recycling system and a dust removing system which are sequentially arranged, wherein a first conveying system is arranged between the first crushing system and the liquid crystal recycling system, a second conveying system is arranged between the liquid crystal recycling system and the panel recycling system, the liquid crystal recycling system comprises a liquid crystal extraction device and a liquid crystal recycling device arranged corresponding to the liquid crystal extraction device, the input end of the liquid crystal extraction device is arranged corresponding to the first conveying system, the first crushing system and the panel recycling system are both communicated with the dust removing system, and a liquid crystal extracting agent is arranged in the liquid crystal extraction device.
Preferably, the liquid crystal recovery processing device comprises an extraction device communicated with the liquid crystal extraction equipment, an extraction agent is arranged in the extraction device, and the extraction device is communicated with distillation equipment.
Preferably, the first crushing system comprises a first crusher, the input end of the first crusher is fixedly connected with a first conveying unit, the output end of the first crusher is communicated with the first conveying system, the first conveying system comprises a second conveying unit, one end of the second conveying unit is fixedly connected with the output end of the first crusher, and the other end of the second conveying unit is fixedly connected with the input end of the liquid crystal extraction equipment.
Preferably, the second conveying system comprises one end and a third conveying unit fixedly connected with the output end of the liquid crystal extraction device, the other end of the third conveying unit is fixedly connected with the input end of a second crusher, the output end of the second crusher is fixedly connected with the one end of a fourth conveying unit, the other end of the fourth conveying unit is fixedly connected with the input end of a first vibration sorting machine, the output end of the first vibration sorting machine is fixedly connected with one end of a fifth conveying unit, the other end of the fifth conveying unit is fixedly connected with the input end of a third crusher, the output end of the third crusher is fixedly connected with one end of a sixth conveying unit, and the other end of the sixth conveying unit is fixedly connected with the second vibration sorting machine.
Preferably, the dust removal system comprises a pulse dust collector and an activated carbon filtering device communicated with the pulse dust collector, and the first crusher, the second crusher, the first vibration sorting machine, the third crusher and the second vibration sorting machine are communicated with the pulse dust collector.
Preferably, the liquid crystal extractant is one or a combination of more of methyl isobutyl ketone, isopropanol, cyclohexanone, ethanol, cyclohexane, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, diethyl ether, ethylenediamine, ethyl acetate and propyl acetate.
Preferably, the extractant is one or a combination of more of ethyl valerate, methyl acetate, ethyl formate, ethylene glycol, propylene glycol, cyclohexane, turpentine and kerosene.
Preferably, the discharge size after the first crusher is crushed is 20-40 mm; the crushing size of the second crusher is 2-3mm, and the aperture of the screen mesh of the first vibration separator is 3 mm; the crushing size of the third crusher is 0.1-1mm, and the mesh diameter of the second vibrating separator is 20 meshes.
A resource recycling treatment process for waste liquid crystal panels comprises the following steps:
a. primary crushing: carrying out primary crushing on the waste liquid crystal panels in a first crusher until the minimum size is 20 mm;
b. liquid crystal extraction: b, conveying the crushed material in the step a to liquid crystal extraction equipment, and performing liquid crystal extraction through a liquid crystal extractant to obtain a mixed solution;
c. liquid crystal treatment and recovery: c, conveying the mixed liquid in the step b into a liquid crystal recovery processing device, and processing and recovering liquid crystal;
d. panel treatment and recovery: and c, processing and recycling the material panel with the liquid crystal recycled in the step b through a recycling processing system.
Preferably, the exhaust gas dust generated in the crushing process in the step a and the step d is collected into a dust removal system through a pipeline for dust removal, filtration and discharge.
The invention discloses the following technical effects:
the resource recycling treatment system for the waste liquid crystal panels, provided by the invention, can be used for classifying and recycling glass, polarizing films, liquid crystals and the like generated by the waste liquid crystal panels, collecting the generated harmful substances (such as liquid crystal cleaning liquid and broken dust) in real time in the whole recycling process, recycling the harmful substances, and performing multiple purification treatment on the discharged air, so that the liquid crystals and the dust are ensured not to overflow, the harmless and green recycling of the liquid crystal panels is realized, the water resource waste is reduced, the cost is reduced, the resources are saved, the energy consumption is reduced, the whole structure is compact, the performance is stable and reliable, the operation is simple, the recycling efficiency of the waste liquid crystal panels can be greatly improved, the energy consumption of system process equipment is low, and the production cost of the waste liquid crystal panels can be further reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic front view of a recycling system for waste liquid crystal panels according to the present invention;
FIG. 2 is a schematic diagram of a side-inclined structure of a recycling system for waste liquid crystal panels according to the present invention;
FIG. 3 is a schematic view of a recycling process of waste liquid crystal panels according to the present invention;
wherein, 1, a first conveying unit; 2. a first crusher; 3. a second conveying unit; 4. a liquid crystal extraction device; 5. an extraction device; 6. a distillation apparatus; 7. a third conveying unit; 8. a second crusher; 9. a fourth conveying unit; 10. a first vibratory separator; 11. a fifth conveying unit; 12. a third crusher; 13. a sixth conveying unit; 14. a second vibratory separator; 15. a pulse dust collector; 16. an active carbon filter device.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The invention provides a resource recycling treatment system and process for waste liquid crystal panels, which comprises a first crushing system, a liquid crystal recycling treatment system, a panel recycling treatment system and a dust removal system which are sequentially arranged, wherein a first conveying system is arranged between the first crushing system and the liquid crystal recycling treatment system, a second conveying system is arranged between the liquid crystal recycling treatment system and the panel recycling treatment system, the liquid crystal recycling treatment system comprises liquid crystal extraction equipment 4 and a liquid crystal recycling treatment device arranged corresponding to the liquid crystal extraction equipment 4, the input end of the liquid crystal extraction equipment 4 is arranged corresponding to the first conveying system, the first crushing system and the panel recycling treatment system are both communicated with the dust removal system, and a liquid crystal extracting agent is arranged in the liquid crystal extraction equipment 4.
In order to realize the recovery treatment of the liquid crystal, the liquid crystal recovery treatment device comprises an extraction device 5 communicated with a liquid crystal extraction device 4, an extraction agent is arranged in the extraction device 5, the mixed solution of the liquid crystal and the liquid crystal extraction agent is extracted and separated by the extraction agent, the liquid crystal enters the extraction agent, the liquid crystal extraction agent returns to the liquid crystal extraction device 4 for recycling, the extraction device 5 is communicated with a distillation device 6, and the distillation device 6 carries out low-temperature distillation treatment on the mixed solution of the liquid crystal and the extraction agent to obtain the recovered product liquid crystal and the recyclable extraction agent.
Further optimize the scheme, in order to realize the elementary breakage to liquid crystal display panel, first broken system includes first breaker 2, the first conveying unit 1 of input fixedly connected with of first breaker 2, the output and the first conveying system intercommunication of first breaker 2, first conveying system includes one end and the second conveying unit 3 of the 2 output fixed connection of first breaker, the 3 other ends of second conveying unit and the input fixed connection of liquid crystal extraction equipment 4.
Further optimization scheme, in order to realize the breakage and screening of liquid crystal separation rear panel, second conveying system includes that one end and liquid crystal extraction equipment 4 output end fixed connection's third conveying unit 7, the other end fixed connection of third conveying unit 7 has the input of second breaker 8, the output fixed connection of second breaker 8 has the one end of fourth conveying unit 9, the other end fixed connection of fourth conveying unit 9 has the input of first vibration sorting machine 10, the output fixed connection of first vibration sorting machine 10 has the one end of fifth conveying unit 11, the other end fixed connection of fifth conveying unit 11 has the input of third breaker 12, the output fixed connection of third breaker 12 has the one end of sixth conveying unit 13, the other end fixed connection of sixth conveying unit 13 has second vibration sorting machine 14, obtain glass and polarizing film after the screening is accomplished.
Further optimization scheme, in order to realize the dust collection in the recovery processing process, the dust removal system comprises a pulse dust collector 15 and an active carbon filtering device 16 communicated with the pulse dust collector 15, the first crusher 2, the second crusher 8, the first vibration sorting machine 10, the third crusher 12 and the second vibration sorting machine 14 are all communicated with the pulse dust collector 15, dust generated in the process is conveyed to the pulse dust collector 15 for dust removal, then passes through the active carbon filtering device 16, and the discharged waste gas is discharged after final processing.
In order to further optimize the scheme, in order to realize the extraction of the liquid crystal, the liquid crystal extracting agent is one or the combination of several of methyl isobutyl ketone, isopropanol, cyclohexanone, ethanol, cyclohexane, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, diethyl ether, ethylenediamine, ethyl acetate and propyl acetate, and the liquid crystal is efficiently separated from the liquid crystal panel.
In order to further optimize the scheme, in order to realize the extraction of the extracted liquid crystal, the extracting agent is one or a combination of several of ethyl valerate, methyl acetate, ethyl formate, ethylene glycol, propylene glycol, cyclohexane, turpentine and kerosene, and the liquid crystal is dissolved in the extracting agent to realize the effective separation of the liquid crystal.
According to a further optimized scheme, the discharging size of the crushed material of the first crusher 2 is 20-40 mm; the crushing size of the second crusher 8 is 2-3mm, and the mesh diameter of the first vibrating separator 10 is 3 mm; the crushing size of the third crusher 12 is 0.1-1mm, and the mesh size of the second vibratory separator 14 is 20 meshes.
A resource recycling treatment process for waste liquid crystal panels comprises the following steps:
a. primary crushing: the waste liquid crystal panels are subjected to primary crushing in a first crusher 2 until the minimum size is 20 mm;
b. liquid crystal extraction: b, conveying the crushed material in the step a to liquid crystal extraction equipment 4, and performing liquid crystal extraction by adopting a liquid crystal extracting agent with the concentration of 2-15% to obtain a mixed solution;
c. liquid crystal treatment and recovery: b, conveying the mixed liquid in the step b into an extraction device 5, extracting by using an extractant to obtain a mixed liquid of liquid crystal and the extractant, conveying the extracted liquid crystal extractant to a liquid crystal extraction device 4 for reuse, distilling the mixed liquid of the liquid crystal and the extractant in a distillation device 6 at 20-40 ℃ to obtain the liquid crystal and the extractant, recycling the liquid crystal, and conveying the extractant to the extraction device 5 for reuse;
d. panel treatment and recovery: and b, performing secondary crushing on the material panel with the liquid crystal recovered in the step b by using a second crusher 8 to 2-3mm, then sorting the material panel by using a first vibration sorting machine 10, classifying and collecting undersize materials on the first vibration sorting machine 10, performing tertiary crushing on oversize materials in a third crusher 12 to less than 1mm, then screening the materials by using a screen with 20 meshes by using a second vibration sorting machine 14, and classifying and collecting the screened glass and the polarizing film.
And (3) further optimizing the scheme, and collecting the waste gas and dust generated in the crushing process in the step a and the step d into a dust removal system through a pipeline for dust removal, filtration and discharge.
When the system and the process are used, 200kg of liquid crystal panels are conveyed to a first crusher 2 through a first conveying unit 1 and crushed into 20-30mm crushed materials, the crushed materials are conveyed to a liquid crystal extraction device 4 through a second conveying unit 3, liquid crystal is extracted and cleaned in 8% of liquid crystal extracting agent (cyclohexanone: ethanol: cyclohexane: 1:1), the liquid crystal is extracted by the cleaned mixed liquid through extracting agent (turpentine), the extracted cleaning liquid is reused, the extracting agent containing the liquid crystal is distilled at 25 ℃ in a distillation device 6 to obtain product liquid crystal, and the liquid crystal extraction rate reaches 92%. After the washed crushed materials are dried and dehydrated, the crushed materials are conveyed to a second crusher 8 through a third conveying unit 7 to be crushed for the second stage, the crushing size is 2-3mm, then the crushed materials for the second stage are conveyed to a first vibration sorting machine 10 through a fourth conveying unit 9 to be subjected to vibration screening, the size of a screen is 3mm, impurities are removed through combustion, 81.2% of glass fine powder and 18.8% of polarizing film fragments are obtained as undersize, the oversize is glass and polarizing film bonding fragments which are larger than 3mm, the oversize is conveyed to a third crusher 12 through a fifth conveying unit 11 to be subjected to three-stage crushing, the crushing size is 0-1.5mm, the crushed materials for the third stage are conveyed to a second vibration sorting machine 14 through a sixth conveying unit 13 to be screened, the size of the screen is 1.5mm, 88.9% of glass fine powder and 11.1% of polarizing film fragments are obtained as undersize, 90.9% of polarizing film and 9.1% of glass cullet are crushed, and collecting the oversize product and the undersize product respectively to obtain the product glass and the product polarizing film.
In the first embodiment, 200kg of a liquid crystal panel is conveyed to a first crusher 2 through a first conveying unit 1 to be crushed into 20-30mm crushed materials, the crushed materials are conveyed to a liquid crystal extraction device 4 through a second conveying unit 3, liquid crystal is extracted and cleaned in 2% of liquid crystal extractant (ethanol), the cleaned mixed liquid is used for extracting liquid crystal through the extractant (diethyl ether), the extracted cleaning liquid is reused, the extracted extractant containing the liquid crystal is distilled at 30 ℃ in a distillation device 6 to obtain a product liquid crystal, and the liquid crystal extraction rate reaches 68%. After the cleaned crushed materials are dried and dehydrated, the crushed materials are conveyed to a second crusher 8 through a third conveying unit 7 to be crushed for the second stage, the crushing size is 2-3mm, then the crushed materials for the second stage are conveyed to a first vibration sorting machine 10 through a fourth conveying unit 9 to be subjected to vibration screening, the size of a screen is 2.5mm, impurities are removed through combustion, 85.6% of glass fine powder and 14.4% of polarizing film fragments of undersize are obtained, the oversize is glass and polarizing film bonding fragments of more than 2.5mm, the oversize is conveyed to a third crusher 12 through a fifth conveying unit 11 to be crushed for the third stage, the crushing size is 0-1.25mm, the crushed materials for the third stage are conveyed to a second vibration sorting machine 14 through a sixth conveying unit 13 to be screened, the size of the screen is 1.25mm, 93.8% of glass fine powder and 6.2% of polarizing film fragments of undersize are obtained, the oversize is 94.9% of polarizing film and 5.1% of glass cull, and collecting the oversize product and the undersize product respectively to obtain the product glass and the product polarizing film.
In example two, 200kg of a liquid crystal panel is conveyed to a first crusher 2 through a first conveying unit 1, the liquid crystal panel is crushed into 20-30mm crushed materials, the crushed materials are conveyed to a liquid crystal extraction device 4 through a second conveying unit 3, liquid crystal extraction and cleaning are carried out in 10% of a liquid crystal extracting agent (ethylenediamine: ethyl acetate: 1:2), liquid crystal is extracted by a cleaned mixed solution through an extracting agent (kerosene: cyclohexane: 2:1), the extracted cleaning solution is reused, the extracting agent containing the liquid crystal is distilled in a distillation device 6 at 35 ℃ to obtain product liquid crystal, and the liquid crystal extraction rate reaches 94%. After the cleaned crushed materials are dried and dehydrated, the crushed materials are conveyed to a second crusher 8 through a third conveying unit 7 to be crushed for the second stage, the crushing size is 2-3mm, then the crushed materials for the second stage are conveyed to a first vibration sorting machine 10 through a fourth conveying unit 9 to be subjected to vibration screening, the size of a screen is 3mm, impurities are removed through combustion, 77% of glass fine powder and 23% of polarizing film fragments are obtained as undersize, the oversize is glass and polarizing film bonding fragments larger than 3mm, the oversize is conveyed to a third crusher 12 through a fifth conveying unit 11 to be crushed for the third stage, the crushing size is 0-2mm, the crushed materials for the third stage are conveyed to a second vibration sorting machine 14 through a sixth conveying unit 13 to be screened, the screen size is 1.25mm, 90.7% of glass fine powder and 9.3% of polarizing film fragments are obtained as undersize, 89.9% of polarizing film and 10.1% of glass cull are obtained as undersize, and collecting the oversize product and the undersize product respectively to obtain the product glass and the product polarizing film.
In example three, 200kg of a liquid crystal panel was conveyed to a first crusher 2 by a first conveying unit 1, and crushed into a crushed material of 20 to 30mm, the crushed material was conveyed to a liquid crystal extraction apparatus 4 by a second conveying unit 3, liquid crystal extraction and cleaning were performed in 15% of a liquid crystal extractant (cyclohexane: ethylenediamine: propyl acetate: 1:1:1), liquid crystal was extracted by the mixed liquid after cleaning with an extractant (ethyl acetate: kerosene: 2:1), the cleaning liquid after extraction was reused, the extractant containing liquid crystal obtained by extraction was distilled at 40 ℃ in a distillation apparatus 6 to obtain a product liquid crystal, and the liquid crystal extraction rate reached 98%. After the cleaned crushed materials are dried and dehydrated, the crushed materials are conveyed to a second crusher 8 through a third conveying unit 7 to be crushed for the second stage, the crushing size is 2-3mm, then the crushed materials for the second stage are conveyed to a first vibration sorting machine 10 through a fourth conveying unit 9 to be subjected to vibration screening, the size of a screen is 2.5mm, impurities are removed through combustion, 85% of glass fine powder and 15% of polarizing film fragments of undersize are obtained, the oversize is glass and polarizing film bonding fragments larger than 2.5mm, the oversize is conveyed to a third crusher 12 through a fifth conveying unit 11 to be crushed for the third stage, the crushing size is 1-2mm, the crushed materials for the third stage are conveyed to a second vibration sorting machine 14 through a sixth conveying unit 13 to be screened, the size of the screen is 1.25mm, 90.7% of glass fine powder and 9.3% of polarizing film fragments of undersize are obtained, 92.9% of polarizing film and 7.1% of glass cullet are obtained, and collecting the oversize product and the undersize product respectively to obtain the product glass and the product polarizing film.
In example four, 200kg of a liquid crystal panel is conveyed to a first crusher 2 through a first conveying unit 1 to be crushed into 20-30mm crushed materials, the crushed materials are conveyed to a liquid crystal extraction device 4 through a second conveying unit 3, liquid crystal extraction and cleaning are carried out in 8% of a liquid crystal extracting agent (ethylenediamine: ethyl acetate: 1:2), liquid crystal is extracted from a cleaned mixed solution through an extracting agent (ethyl acetate: kerosene: 2:1), the extracted cleaning solution is reused, the extracting agent containing the liquid crystal is distilled in a distillation device 6 at 25 ℃ to obtain a product liquid crystal, and the liquid crystal extraction rate reaches 88%. After the cleaned crushed materials are dried and dehydrated, the crushed materials are conveyed to a second crusher 8 through a third conveying unit 7 to be crushed for the second stage, the crushing size is 2-3mm, then the crushed materials for the second stage are conveyed to a first vibration sorting machine 10 through a fourth conveying unit 9 to be subjected to vibration screening, the size of a screen is 2mm, impurities are removed through combustion, 93.2% of glass fine powder and 6.8% of polarizing film fragments are obtained as undersize, 2.5mm of glass and polarizing film bonding fragments are obtained as oversize, the oversize is conveyed to a third crusher 12 through a fifth conveying unit 11 to be crushed for the third stage, the crushing size is less than 1mm, the crushed materials for the third stage are conveyed to a second vibration sorting machine 14 through a sixth conveying unit 13 to be screened, the size of the screen is 1mm, 94.7% of glass fine powder and 5.3% of polarizing film fragments are obtained as undersize, 95.9% of polarizing film and 4.1% of glass cull are obtained as oversize, and then respectively collecting the oversize product and the undersize product to obtain the product glass and the product polarizing film.
In example five, 200kg of liquid crystal panels were conveyed to a first crusher 2 through a first conveying unit 1, crushed into 20-30mm crushed materials, the crushed materials were conveyed to a liquid crystal extraction apparatus 4 through a second conveying unit 3, liquid crystal extraction and cleaning were performed in 12% liquid crystal extractant (ethanol: diethyl ether: 1:1), liquid crystal was extracted by the extractant (ethyl acetate: cyclohexane: cyclohexanone: 1:1:1) from the cleaned mixed liquid, the cleaning liquid after extraction was reused, the extractant containing liquid crystal obtained by extraction was distilled at 30 ℃ in a distillation apparatus 6 to obtain liquid crystal products, and the liquid crystal extraction rate reached 85%. After the cleaned crushed materials are dried and dehydrated, the crushed materials are conveyed to a second crusher 8 through a third conveying unit 7 to be crushed for the second stage, the crushing size is 2-3mm, then the crushed materials for the second stage are conveyed to a first vibration sorting machine 10 through a fourth conveying unit 9 to be subjected to vibration screening, the size of a screen is 32mm, impurities are removed through combustion, glass fine powder with the undersize of 92.8 percent and 7.2 percent of polarized film fragments are obtained, the oversize is glass and polarized film bonding fragments with the oversize of more than 2.0mm, the oversize is conveyed to a third crusher 12 through a fifth conveying unit 11 to be crushed for the third stage, the crushing size is less than 1mm, the crushed materials for the third stage are conveyed to a second vibration sorting machine 14 through a sixth conveying unit 13 to be screened, the size of the screen is 0.85mm, the glass fine powder with the undersize of 98.7 percent and 1.3 percent of polarized film fragments are obtained, the oversize is 98.9 percent of polarized film and 1.1 percent of glass cull, and collecting the oversize product and the undersize product respectively to obtain the product glass and the product polarizing film.
Through the experimental data of the above embodiments, a higher recovery ratio is obtained, which is used for realizing high-ratio classified recovery of glass, polarizing films, liquid crystals and the like in the waste liquid crystal panels, and greatly improving the utilization efficiency of the waste liquid crystal panels.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (10)
1. The utility model provides a waste liquid crystal panel resource recovery processing system, its characterized in that, including the first broken system, liquid crystal recovery processing system, panel recovery processing system and the dust pelletizing system that set gradually, first broken system with be provided with first conveying system between the liquid crystal recovery processing system, liquid crystal recovery processing system with be provided with the second conveying system between the panel recovery processing system, liquid crystal recovery processing system include liquid crystal extraction equipment (4) and with the liquid crystal recovery processing device that liquid crystal extraction equipment (4) corresponds the setting, the input of liquid crystal extraction equipment (4) with first conveying system corresponds the setting, first broken system with panel recovery processing system all with the dust pelletizing system intercommunication, be provided with the liquid crystal extractant in liquid crystal extraction equipment (4).
2. The recycling system for waste liquid crystal panels as claimed in claim 1, which is characterized in that: the liquid crystal recovery processing device comprises an extraction device (5) communicated with the liquid crystal extraction equipment (4), an extraction agent is arranged in the extraction device (5), and the extraction device (5) is communicated with distillation equipment (6).
3. The recycling system for waste liquid crystal panels as claimed in claim 1, which is characterized in that: the first crushing system comprises a first crusher (2), the input end of the first crusher (2) is fixedly connected with a first conveying unit (1), the output end of the first crusher (2) is communicated with the first conveying system, the first conveying system comprises a second conveying unit (3) with one end fixedly connected with the output end of the first crusher (2), and the other end of the second conveying unit (3) is fixedly connected with the input end of the liquid crystal extraction equipment (4).
4. The recycling treatment system for the waste liquid crystal panels as claimed in claim 3, which is characterized in that: the second conveying system comprises a third conveying unit (7) with one end fixedly connected with the output end of the liquid crystal extraction device (4), the other end of the third conveying unit (7) is fixedly connected with the input end of a second crusher (8), the output end of the second crusher (8) is fixedly connected with one end of a fourth conveying unit (9), the other end of the fourth conveying unit (9) is fixedly connected with the input end of a first vibration sorting machine (10), the output end of the first vibration sorting machine (10) is fixedly connected with one end of a fifth conveying unit (11), the other end of the fifth conveying unit (11) is fixedly connected with the input end of a third crusher (12), the output end of the third crusher (12) is fixedly connected with one end of a sixth conveying unit (13), the other end of the sixth conveying unit (13) is fixedly connected with a second vibration sorting machine (14).
5. The recycling system for waste liquid crystal panels as claimed in claim 4, wherein the recycling system comprises: the dust removal system comprises a pulse dust collector (15) and an activated carbon filtering device (16) communicated with the pulse dust collector (15), wherein the first crusher (2), the second crusher (8), the first vibration separator (10), the third crusher (12) and the second vibration separator (14) are communicated with the pulse dust collector (15).
6. The recycling system for waste liquid crystal panels as claimed in claim 1, which is characterized in that: the liquid crystal extractant is one or more of methyl isobutyl ketone, isopropanol, cyclohexanone, ethanol, cyclohexane, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, diethyl ether, ethylenediamine, ethyl acetate and propyl acetate.
7. The recycling treatment system for the waste liquid crystal panels as claimed in claim 2, which is characterized in that: the extractant is one or more of ethyl valerate, methyl acetate, ethyl formate, ethylene glycol, propylene glycol, cyclohexane, turpentine and kerosene.
8. The recycling system for waste liquid crystal panels as claimed in claim 4, wherein the recycling system comprises: the discharging size of the crushed material of the first crusher (2) is 20-40 mm; the crushing size of the second crusher (8) is 2-3mm, and the mesh diameter of the first vibrating separator (10) is 3 mm; the crushing size of the third crusher (12) is 0.1-1mm, and the mesh size of the second vibrating separator (14) is 20 meshes.
9. A waste liquid crystal panel recycling treatment process is applied to the waste liquid crystal panel recycling treatment system of claim 1, and is characterized in that: the method comprises the following steps:
a. primary crushing: carrying out primary crushing on the waste liquid crystal panels in a first crusher (2) until the minimum size is 20 mm;
b. liquid crystal extraction: b, conveying the crushed material in the step a to liquid crystal extraction equipment (4), and performing liquid crystal extraction through a liquid crystal extractant to obtain a mixed solution;
c. liquid crystal treatment and recovery: b, conveying the mixed liquid in the step b into a liquid crystal recovery processing device, and processing and recovering liquid crystal;
d. panel treatment and recovery: and c, processing and recycling the material panel with the liquid crystal recycled in the step b through a recycling processing system.
10. The resource recycling treatment process of the waste liquid crystal display panel according to claim 9, characterized in that: collecting the waste gas and dust generated in the crushing process in the step a and the step d into a dust removal system through a pipeline, and performing dust removal, filtration and discharge.
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| CN113976595A (en) * | 2021-11-01 | 2022-01-28 | 江苏荣麒循环科技有限公司 | Soft package lithium ion battery recovery processing system and process |
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| CN104498721A (en) * | 2015-01-08 | 2015-04-08 | 中国科学院城市环境研究所 | Innocent treatment method and system for liquid crystal panel |
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