Treatment equipment for plastic packaging waste

Abstract

The utility model discloses treatment equipment for plastic packaging waste, and relates to the field of solid waste resourceful treatment. According to the technical scheme, the waste plastic bag processing system is characterized by comprising a waste plastic bag processing line and a waste plastic barrel processing line, and the waste plastic bag processing line comprises a first crushing device, a pyrolysis device and a cooling device; the waste plastic barrel treatment line comprises a second crushing device, a third crushing device, a first cleaning device, a first rinsing device, a second cleaning device, a second rinsing device and a centrifugal dewatering device, the centrifugal dewatering device is connected with an extrusion granulation device, and the discharge end of the cooling device is connected with a wastewater treatment line. The water outlet end of the first cleaning device is connected to a wastewater treatment line. The utility model aims to provide treatment equipment for plastic packaging wastes.

Description

Technical Field

[0001] More specifically, it relates to a treatment device for plastic packaging waste. Background Art

[0002] my country produces hundreds of billions of packaging containers every year. Recycling and reusing plastic packaging containers can not only solve environmental problems, but also save raw material resources and alleviate the contradiction of insufficient raw materials. At present, packaging containers are mainly waste plastic bags and waste plastic barrels. In particular, chemical packaging wastes such as foaming barrels from solar power plants, refrigerator plants, oil barrels from chemical fiber plants, packaging bags and auxiliary barrels from printing and dyeing plants, softener and degreasing agent barrels from tanneries, packaging barrels from chemical plants, and plastic packaging bags in barrels are hazardous wastes, and there are not many economically reasonable treatment equipment.

[0003] Chinese patent CN01809172.5 discloses a device for dry separation of recycled garbage containing packaging waste, which is used for dry separation of recycled garbage containing plastic packaging waste of different polymer families, and removes impurities in the material flow in a multi-stage manner.

[0004] Chinese patent CN201820352710.4 discloses a packaging waste classification and recycling device, which uses a classification treatment method to mainly classify packaging waste into paper packaging waste, glass packaging waste, plastic packaging waste and metal packaging waste.

[0005] Chinese patent CN200910137104.6 discloses a device for making derived fuel particles from waste plastic bags. The old plastic bags are fed into a crusher through a feed conveyor for crushing, and the dust and sludge are filtered through a screening machine and conveyed to a derived fuel granulator for cleaning and heating to form granular derived fuel.

[0006] Chinese patent CN201821072947.3 discloses a waste plastic recycling and granulation system, which cuts the waste plastic into 10 cm uniform fragments and transports them into a primary plastic washing machine. After washing, the waste plastic is brought into a secondary plastic washing machine by centrifugal force. After washing and water control, it enters a hot melt machine for melting and mixing, and then is extruded into plastic strips by an extrusion molding device.

[0007] Comprehensive analysis shows that the above-mentioned technical solutions have a single treatment form, and are unable to coordinate the disposal and energy complementation of the two types of waste, waste plastic bags and waste plastic barrels, and the treatment efficiency is low.

[0008] Therefore, a new technical solution is urgently needed to solve the above technical problems. Utility Model Content

[0009] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a device for processing plastic packaging waste.

[0010] The above technical purpose of the utility model is achieved through the following technical solutions: a kind of plastic packaging waste processing equipment, including a waste plastic bag processing line and a waste plastic barrel processing line, the waste plastic bag processing line includes a first crushing device, a pyrolysis device, and a cooling device, the waste plastic barrel processing line includes a second crushing device, a third crushing device, a first cleaning device, a first rinsing device, a second cleaning device, a second rinsing device and a centrifugal dehydration device, the centrifugal dehydration device is connected to an extrusion granulation device, the discharge end of the cooling device is connected to a wastewater treatment line, and the water outlet end of the first cleaning device is connected to the wastewater treatment line.

[0011] The utility model is further configured as follows: the wastewater treatment line includes an adsorption purification device, which is connected to a solid-liquid separation device, a sewage treatment system, and a water storage tank, and the water storage tank is also connected to a second rinsing device.

[0012] The utility model is further configured as follows: the solid-liquid separation device is also connected to the pyrolysis device, and the separated solid plastic is transported to the pyrolysis device for carbonization treatment.

[0013] The utility model is further configured as follows: a water delivery device is provided between the centrifugal dehydration device and the second cleaning device, between the second rinsing device and the second cleaning device, between the second cleaning device and the first rinsing device, and between the first rinsing device and the first cleaning device.

[0014] The utility model is further configured as follows: the hot smoke outlet of the pyrolysis device is connected to the hot smoke inlet of the extrusion granulation device, and the hot smoke outlet of the extrusion granulation device is connected to the exhaust gas treatment system.

[0015] The utility model is further configured as follows: the exhaust gas treatment system comprises an exhaust gas treatment device (21), a fan and a chimney.

[0016] The utility model has the following beneficial effects:

[0017] 1. The indirect pyrolysis process is used to treat waste plastic bags. The pyrolytic carbon obtained is used for wastewater pretreatment, which greatly reduces the technical difficulty and investment cost of the sewage treatment system; the pyrolysis gas obtained is burned and used for the pyrolysis system's own consumption, and the hot flue gas is used as energy for the extrusion granulation device, realizing the cascade utilization of energy and achieving significant energy-saving effects.

[0018] 2. The new equipment realizes the coordinated treatment of two types of plastic packaging waste, waste plastic bags and waste plastic barrels, to obtain recycled plastic granules. The system operates stably, has a high processing capacity, and realizes cascade utilization of water and energy. While the technology and economy are feasible, it also has significant energy-saving and environmental protection benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1Schematic diagram of the system flow of this embodiment;

[0020] Figure 2 Schematic diagram of the exhaust gas treatment system in this embodiment.

[0021] Description of the drawings: 1. Waste plastic bag processing line; 2. Waste plastic barrel processing line; 3. First crushing device; 4. Pyrolysis device; 5. Cooling device; 6. Second crushing device; 7. Third crushing device; 8. First cleaning device; 9. Wastewater treatment line; 10. Extrusion granulation device; 11. Adsorption purification device; 12. Solid-liquid separation device; 13. Sewage treatment system; 14. Water storage tank; 15. First rinsing device; 16. Second cleaning device; 17. Second rinsing device; 18. Centrifugal dehydration device; 19. Water delivery device; 20. Exhaust gas treatment system; 21. Exhaust gas treatment device; 22. Fan; 23. Chimney. DETAILED DESCRIPTION

[0022] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0023] The same parts are denoted by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings, and the words "bottom" and "top", "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0024] As shown in the figure, a processing equipment for plastic packaging waste includes a waste plastic bag processing line 1 and a waste plastic barrel processing line 2, wherein the waste plastic bag processing line 1 includes a first crushing device 3, a pyrolysis device 4, and a cooling device 5, and the waste plastic barrel processing line 2 includes a second crushing device 6, a third crushing device 7, a first cleaning device 8, a first rinsing device 15, a second cleaning device 16, a second rinsing device 17 and a centrifugal dehydration device 18, wherein the centrifugal dehydration device 18 is connected to an extrusion granulation device 10, a discharge end of the cooling device 5 is connected to a wastewater treatment line 9, and a water outlet end of the first cleaning device 8 is connected to the wastewater treatment line 9.

[0025] The first crushing device 3 and the third crushing device 7 are ordinary plastic shearing crushers, the crushing device 6 is a plastic shredder, the pyrolysis device 4 is an indirect heating rotary drum pyrolysis furnace, the cooling device 6 is a drum indirect cooling device, a belt cooling device or a disc cooling device, the first cleaning device 8 is a water pool with a stirring device, the first rinsing device 15 and the second rinsing device 17 are drum rinsing machines with stirring devices, and the second cleaning device 16 is a crawler cleaning machine with a spray system.

[0026] When processing waste plastics, the waste plastics are classified, and the plastic bags are placed in the waste belt processing line 1 for preliminary processing. After being processed by the first crushing device 3, the plastic bags enter the pyrolysis device 4 for carbonization treatment, and are cooled by the cooling device 5 to obtain pyrolytic carbon and sent to the wastewater treatment line 9; the hard plastic barrels are placed in the waste plastic barrel processing line 2 for preliminary processing, and are crushed by the second crushing device 6 and the third crushing device 7 to become smaller plastic blocks, and pass through the first cleaning device 8, the first rinsing device 15, the second cleaning device 16, the second rinsing device 17 and the centrifugal dehydration device 18 to obtain clean plastic blocks, which are finally sent to the extrusion granulation device 10 for extrusion granulation to obtain recycled plastic granule products.

[0027] This solution uses an indirect pyrolysis process to treat waste plastic bags, and the resulting pyrolytic carbon is used for wastewater pretreatment, which greatly reduces the technical difficulty and investment cost of the sewage treatment system; the pyrolysis gas is burned for the pyrolysis system's own consumption, and the hot flue gas is used as energy for the extrusion granulation device 10, achieving cascade utilization of energy and significant energy-saving effects. The coordinated treatment of two types of plastic packaging waste, waste plastic bags and waste plastic barrels, is achieved to obtain recycled plastic granule products. The system operates stably, has a high processing capacity, and the cascade utilization of water and energy is technically and economically feasible, while the energy-saving and environmental protection benefits are significant.

[0028] The wastewater treatment line 9 includes an adsorption purification device 11, a solid-liquid separation device 12, a sewage treatment system 13, and a water storage tank 14, which is also connected to a second rinsing device 17. The adsorption purification device 11 is a common mixing tank with a stirring device, the solid-liquid separation device 12 is a high-pressure belt filter press or a plate-frame filter press, the water storage tank 14 is a reinforced concrete tank, and the centrifugal dehydration device 18 is a drum-type centrifugal dehydrator. The hot carbon deposits in the cooling device 4 are sent to the adsorption purification device 11, and the wastewater in the first cleaning device 8 enters the adsorption purification device 11 for wastewater treatment, and then flows back to the second rinsing device 17 after treatment.

[0029] A water supply device 19 is provided between the centrifugal dehydration device 18 and the second cleaning device 16, between the second rinsing device 17 and the second cleaning device 16, between the second cleaning device 16 and the first rinsing device 15, and between the first rinsing device 15 and the first cleaning device 8. After the waste water is purified and enters the second rinsing device, it is refluxed to the first cleaning device 8 through the water supply device 19. The waste water generated by the centrifugal dehydration device 18 is used to replenish the second cleaning device 16, thereby realizing the cascade circulation of water in the whole process.

[0030] The sludge outlet of the sewage treatment system 13 is connected to the solid-liquid separation device 12, so that the sludge is reciprocated. The solid discharge port of the solid-liquid separation device 12 is also connected to the pyrolysis device 4, and the separated solid plastic is transported to the pyrolysis device 4 to be carbonized again to ensure resource utilization.

[0031] The hot flue gas outlet of the pyrolysis device 7 is connected to the hot flue gas inlet of the extrusion granulation device 10. The waste heat of the flue gas is used for the operation of the extrusion granulation device 10. The temperature is controlled to be 150°C-200°C, and the material residence time is 5-10min, so as to achieve the goal of energy cascade utilization. The hot flue gas outlet of the extrusion granulation device 10 is connected to the tail gas treatment system 20, and the tail gas treatment system 20 includes a tail gas treatment device 21, a fan 22 and a chimney 23. The tail gas treatment device is a conventional dry, semi-dry or wet tail gas purification device, the fan 22 is a flue gas fan, and the chimney 23 is a reinforced concrete structure, a brick-concrete structure or a stainless steel structure chimney.

[0032] The specific embodiments are merely explanations of the present invention and are not limitations of the present invention. After reading this specification, those skilled in the art may make modifications to the embodiments without any creative contribution as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A device for processing plastic packaging waste, characterized in that: The invention comprises a waste plastic bag processing line (1) and a waste plastic barrel processing line (2), wherein the waste plastic bag processing line (1) comprises a first crushing device (3), a pyrolysis device (4), and a cooling device (5), and the waste plastic barrel processing line (2) comprises a second crushing device (6), a third crushing device (7), a first cleaning device (8), a first rinsing device (15), a second cleaning device (16), a second rinsing device (17), and a centrifugal dehydration device (18), wherein the centrifugal dehydration device (18) is connected to an extrusion granulation device (10), the discharge end of the cooling device (5) is connected to a wastewater treatment line (9), and the water outlet end of the first cleaning device (8) is connected to the wastewater treatment line.

2. The device for processing plastic packaging waste according to claim 1, characterized in that: The wastewater treatment line (9) comprises an adsorption purification device (11), connected to a solid-liquid separation device (12), a sewage treatment system (13), and a water storage tank (14); the water storage tank (14) is also connected to a second rinsing device (17).

3. The device for processing plastic packaging waste according to claim 2, characterized in that: The solid-liquid separation device (12) is also connected to the pyrolysis device (4), and the separated solid plastic is transported to the pyrolysis device (4) for carbonization treatment.

4. The device for processing plastic packaging waste according to claim 3, characterized in that: A water delivery device (19) is provided between the centrifugal dehydration device (18) and the second cleaning device (16), between the second rinsing device (17) and the second cleaning device (16), between the second cleaning device (16) and the first rinsing device (15), and between the first rinsing device (15) and the first cleaning device.

5. The device for processing plastic packaging waste according to claim 4, characterized in that: The hot flue gas outlet of the pyrolysis device (4) is connected to the hot flue gas inlet of the extrusion granulation device (10), and the hot flue gas outlet of the extrusion granulation device (10) is connected to the tail gas treatment system (20).

6. The device for processing plastic packaging waste according to claim 5, characterized in that: The tail gas treatment system (20) comprises a tail gas treatment device (21), a fan (22) and a chimney (23).

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