CN104624598A - Harmless disassembly treatment method of liquid crystal display (LCD) - Google Patents
Harmless disassembly treatment method of liquid crystal display (LCD) Download PDFInfo
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- CN104624598A CN104624598A CN201310550452.2A CN201310550452A CN104624598A CN 104624598 A CN104624598 A CN 104624598A CN 201310550452 A CN201310550452 A CN 201310550452A CN 104624598 A CN104624598 A CN 104624598A
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- liquid crystal
- crystal display
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Abstract
The invention relates to a field of methods for destroying solid wastes or converting solid wastes into harmless substances, and specifically relates to a harmless disassembly treatment method of LCD. The method is characterized by comprising the following steps in sequence: step a, disassembling; step b, breaking; step c, heating to degrade; step d, burning; and step e, recycling. The method has the advantages that the disassembly is convenient, the operation is safe, the method does not affect the environment, and the resources can be fully utilized.
Description
Technical field
The present invention relates to the destruction of solid waste or solid waste changed into the method field of harmless object, being specially a kind of harmless disassembly processing method of liquid crystal display.
Background technology
Liquid crystal display has high-resolution and outstanding display effect, has the little and lightweight feature of volume concurrently, has become the main product of computer monitor, television set, monitor at present.Face glass, circuit board, power line, metal framework, plastic casing, base and backlight module etc. are had in the composition of liquid crystal display, at present both at home and abroad about the processing method of waste liquid crystal display, mainly lay particular emphasis on the recovery of indium, glass resource, liquid crystal panel stripping, cleaning aspect, and lack a kind of method of dismounting and environmental protection disposal.
Summary of the invention
In order to overcome the defect of prior art, provide a kind of disassemble convenience, handling safety, on environment without impact, disassembling method that resource utilization is high, the invention discloses a kind of harmless disassembly processing method of liquid crystal display.
The present invention reaches goal of the invention by following technical solution:
A harmless disassembly processing method for liquid crystal display, is characterized in that: implement successively as follows:
A. disassemble: disassemble liquid crystal display, from liquid crystal display, unload the glass substrate containing liquid crystal;
B. broken: implement break process to the glass substrate under disassembling, obtain sheet broken material, the diameter of sheet broken material is not more than 50mm;
C. heat resolve: sheet broken material fragmentation obtained afterwards drops in gasification furnace, first pass into nitrogen in gasification furnace and in gasification furnace, heat resolve is implemented to sheet broken material subsequently in 10 minutes, the temperature of heat resolve is at 400 DEG C ~ 600 DEG C, the retention time of heat resolve is at 10min ~ 20min, by heat resolve, sheet broken material resolves into pyrolysis off-gas and residue;
D. burn: the gas outlet of gasification furnace is connected to incinerator, by the pyrolysis off-gas input gasification furnace generated after heat resolve, make pyrolysis off-gas at incinerator Thorough combustion, ignition temperature is at 1000 DEG C ~ 1200 DEG C, burning time is not shorter than 2sec, product after burning is innocuous gas, and the main component of innocuous gas is carbon dioxide, nitrogen, steam etc., and innocuous gas is disposed to ambient atmosphere;
E. reclaim: the residue obtained after reclaiming step c heat resolve, for further recycling treatment, as the indium for reclaiming in residue.
The harmless disassembly processing method of described liquid crystal display, it is characterized in that: between a step and b step, also shear step for interspersed one, during shearing, shear treatment is implemented to the glass substrate under disassembling, glass substrate being cut into the glass substrate fragment that size is no more than 5cm × 5cm, implementing b step destruction step to shearing the rear glass substrate fragment obtained subsequently.
The harmless disassembly processing method of described liquid crystal display, it is characterized in that: during e step, residue is dropped in sulfuric acid solution, add manganese dioxide subsequently, stir and be heated to temperature and be not less than 90 DEG C, then drop into zine plate or aluminium sheet leach at least 3hour with replacement extraction indium.
The harmless disassembly processing method of described liquid crystal display, is characterized in that: during b step, adopts four axle disintegrating machines to disassembling lower glass substrate enforcement break process.
The harmless disassembly processing method of described liquid crystal display, is characterized in that: during c step, the temperature of heat resolve is 500 DEG C.
The harmless disassembly processing method of described liquid crystal display, is characterized in that: during d step, while combustion and pyrolysis waste gas, blast air with air blast in incinerator, or in incinerator, be blown into oxygen with oxygen blast machine.
The present invention carries out heating and decomposition treatment by waste liquid crystal display under a nitrogen atmosphere containing after the glass substrates crash of liquid crystal; By pyrolysis gas under the high temperature conditions Thorough combustion post processing become innocuous gas to discharge; By the Slag recovering that heat resolve produces, do not produce the harmful toxic matter of contaminated environment, and improve the utilization rate of resource.
The invention has the beneficial effects as follows: disassemble conveniently, handling safety, on environment without impact, resource utilization is high.
Detailed description of the invention
The present invention is further illustrated below by way of specific embodiment.
Embodiment 1
A harmless disassembly processing method for liquid crystal display, implement successively as follows:
A. disassemble: disassemble liquid crystal display, from liquid crystal display, unload the glass substrate containing liquid crystal;
B. broken: adopt four axle disintegrating machines to implement break process to the glass substrate under disassembling, obtain sheet broken material, the diameter of sheet broken material is not more than 50mm;
C. heat resolve: sheet broken material fragmentation obtained afterwards drops in gasification furnace, first pass into nitrogen in gasification furnace and in gasification furnace, heat resolve is implemented to sheet broken material subsequently in 10 minutes, the temperature of heat resolve is at 400 DEG C ~ 600 DEG C, more excellent heat resolve temperature is 500 DEG C, the retention time of heat resolve is at 10min ~ 20min, by heat resolve, sheet broken material resolves into pyrolysis off-gas and residue;
D. burn: the gas outlet of gasification furnace is connected to incinerator, by the pyrolysis off-gas input gasification furnace generated after heat resolve, make pyrolysis off-gas at incinerator Thorough combustion, ignition temperature is at 1000 DEG C ~ 1200 DEG C, burning time is not shorter than 2sec, product after burning is innocuous gas, and the main component of innocuous gas is carbon dioxide, nitrogen, steam etc., and innocuous gas is disposed to ambient atmosphere;
E. reclaim: the residue obtained after reclaiming step c heat resolve.
Embodiment 2
A harmless disassembly processing method for liquid crystal display, implement successively as follows:
A. disassemble: disassemble liquid crystal display, from liquid crystal display, unload the glass substrate containing liquid crystal;
B. shear: shear treatment is implemented to the glass substrate under disassembling, glass substrate is cut into the glass substrate fragment that size is no more than 5cm × 5cm;
C. broken: adopt four axle disintegrating machines to implement break process to the glass substrate fragment under shearing, obtain sheet broken material, the diameter of sheet broken material is not more than 50mm;
D. heat resolve: sheet broken material fragmentation obtained afterwards drops in gasification furnace, first pass into nitrogen in gasification furnace and in gasification furnace, heat resolve is implemented to sheet broken material subsequently in 10 minutes, the temperature of heat resolve is at 400 DEG C ~ 600 DEG C, more excellent heat resolve temperature is 500 DEG C, the retention time of heat resolve is at 10min ~ 20min, by heat resolve, sheet broken material resolves into pyrolysis off-gas and residue;
E. burn: the gas outlet of gasification furnace is connected to incinerator, by the pyrolysis off-gas input gasification furnace generated after heat resolve, make pyrolysis off-gas at incinerator Thorough combustion, ignition temperature is at 1000 DEG C ~ 1200 DEG C, burning time is not shorter than 2sec, product after burning is innocuous gas, and the main component of innocuous gas is carbon dioxide, nitrogen, steam etc., and innocuous gas is disposed to ambient atmosphere;
While combustion and pyrolysis waste gas, in incinerator, blast air with air blast, or in incinerator, be blown into oxygen with oxygen blast machine, to impel pyrolysis off-gas Thorough combustion in the sufficient situation of oxygen supply;
F. reclaim: the residue obtained after reclaiming step c heat resolve.
Embodiment 3
A harmless disassembly processing method for liquid crystal display, implement successively as follows:
A. disassemble: disassemble liquid crystal display, from liquid crystal display, unload the glass substrate containing liquid crystal;
B. shear: shear treatment is implemented to the glass substrate under disassembling, glass substrate is cut into the glass substrate fragment that size is no more than 5cm × 5cm;
C. broken: adopt four axle disintegrating machines to implement break process to the glass substrate fragment under shearing, obtain sheet broken material, the diameter of sheet broken material is not more than 50mm;
D. heat resolve: sheet broken material fragmentation obtained afterwards drops in gasification furnace, first pass into nitrogen in gasification furnace and in gasification furnace, heat resolve is implemented to sheet broken material subsequently in 10 minutes, the temperature of heat resolve is at 400 DEG C ~ 600 DEG C, more excellent heat resolve temperature is 500 DEG C, the retention time of heat resolve is at 10min ~ 20min, by heat resolve, sheet broken material resolves into pyrolysis off-gas and residue;
E. burn: the gas outlet of gasification furnace is connected to incinerator, by the pyrolysis off-gas input gasification furnace generated after heat resolve, make pyrolysis off-gas at incinerator Thorough combustion, ignition temperature is at 1000 DEG C ~ 1200 DEG C, burning time is not shorter than 2sec, product after burning is innocuous gas, and the main component of innocuous gas is carbon dioxide, nitrogen, steam etc., and innocuous gas is disposed to ambient atmosphere;
F. reclaim: the residue obtained after reclaiming step c heat resolve, dropped into by residue in sulfuric acid solution, add manganese dioxide subsequently, stirring and being heated to temperature is not less than 90 DEG C, then drop into zine plate or aluminium sheet leach at least 3hour with replacement extraction indium.
Claims (9)
1. a harmless disassembly processing method for liquid crystal display, is characterized in that: implement successively as follows:
A. disassemble: disassemble liquid crystal display, from liquid crystal display, unload the glass substrate containing liquid crystal;
B. broken: implement break process to the glass substrate under disassembling, obtain sheet broken material, the diameter of sheet broken material is not more than 50mm;
C. heat resolve: sheet broken material fragmentation obtained afterwards drops in gasification furnace, first pass into nitrogen in gasification furnace and in gasification furnace, heat resolve is implemented to sheet broken material subsequently in 10 minutes, the temperature of heat resolve is at 400 DEG C ~ 600 DEG C, the retention time of heat resolve is at 10min ~ 20min, by heat resolve, sheet broken material resolves into pyrolysis off-gas and residue;
D. burn: the gas outlet of gasification furnace is connected to incinerator, by the pyrolysis off-gas input gasification furnace generated after heat resolve, make pyrolysis off-gas at incinerator Thorough combustion, ignition temperature is at 1000 DEG C ~ 1200 DEG C, burning time is not shorter than 2sec, product after burning is innocuous gas, and innocuous gas is disposed to ambient atmosphere;
E. reclaim: the residue obtained after reclaiming step c heat resolve.
2. the harmless disassembly processing method of liquid crystal display as claimed in claim 1, it is characterized in that: between a step and b step, also shear step for interspersed one, during shearing, shear treatment is implemented to the glass substrate under disassembling, glass substrate being cut into the glass substrate fragment that size is no more than 5cm × 5cm, implementing b step destruction step to shearing the rear glass substrate fragment obtained subsequently.
3. the harmless disassembly processing method of liquid crystal display as claimed in claim 1, it is characterized in that: during e step, residue is dropped in sulfuric acid solution, add manganese dioxide subsequently, stir and be heated to temperature and be not less than 90 DEG C, then drop into zine plate or aluminium sheet leach at least 3hour with replacement extraction indium.
4. as the harmless disassembly processing method of the liquid crystal display in claims 1 to 3 as described in any one, it is characterized in that: during b step, adopting four axle disintegrating machines to disassembling lower glass substrate enforcement break process.
5. as the harmless disassembly processing method of the liquid crystal display in claims 1 to 3 as described in any one, it is characterized in that: during c step, the temperature of heat resolve is 500 DEG C.
6. as the harmless disassembly processing method of the liquid crystal display in claims 1 to 3 as described in any one, it is characterized in that: during d step, while combustion and pyrolysis waste gas, in incinerator, blast air with air blast, or in incinerator, be blown into oxygen with oxygen blast machine.
7. the harmless disassembly processing method of liquid crystal display as claimed in claim 4, is characterized in that: during c step, the temperature of heat resolve is 500 DEG C.
8. the harmless disassembly processing method of liquid crystal display as claimed in claim 4, is characterized in that: during d step, while combustion and pyrolysis waste gas, blast air with air blast in incinerator, or in incinerator, be blown into oxygen with oxygen blast machine.
9. the harmless disassembly processing method of liquid crystal display as claimed in claim 5, is characterized in that: during d step, while combustion and pyrolysis waste gas, blast air with air blast in incinerator, or in incinerator, be blown into oxygen with oxygen blast machine.
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| CN201310550452.2A CN104624598A (en) | 2013-11-08 | 2013-11-08 | Harmless disassembly treatment method of liquid crystal display (LCD) |
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| CN104923551A (en) * | 2015-07-08 | 2015-09-23 | 上海第二工业大学 | Dismantling and classifying process of waste liquid crystal display |
| CN105080938A (en) * | 2015-09-02 | 2015-11-25 | 扬州宁达贵金属有限公司 | Method for recycling indium, glass and polaroid from waste liquid crystal display screen |
| CN106338069A (en) * | 2016-10-28 | 2017-01-18 | 荆门市格林美新材料有限公司 | Method for performing direct pyrolysis treatment on waste liquid crystal display panels |
| CN106517802A (en) * | 2016-10-28 | 2017-03-22 | 荆门市格林美新材料有限公司 | Method for preparing foam glass by adopting waste liquid crystal display panel |
| CN106623338A (en) * | 2015-10-28 | 2017-05-10 | 格林美股份有限公司 | Waste circuit board harmless treatment method and waste circuit board harmless treatment apparatus |
| CN105063364B (en) * | 2015-09-02 | 2020-01-07 | 扬州宁达贵金属有限公司 | Method for recovering indium from waste liquid crystal display screen |
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| CN106517802A (en) * | 2016-10-28 | 2017-03-22 | 荆门市格林美新材料有限公司 | Method for preparing foam glass by adopting waste liquid crystal display panel |
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Application publication date: 20150520 |