Cooperative treatment system for organic solid waste

Abstract

The utility model relates to an organic solid waste co-processing system which comprises a pretreatment system, a fermentation system, a granulation device, a pyrolyzing furnace, a flue gas processing system and a leachate processing system, the pretreatment system is used for carrying out crushing and dewatering pretreatment on organic solid waste, and a discharge port and a liquid outlet are formed in the pretreatment system; the feed end of the fermentation system is connected with the discharge port of the pretreatment system; the feeding end of the granulation device is connected with the discharging end of the fermentation system; the feeding end of the pyrolyzing furnace is connected with the discharging end of the granulating device; the leachate treatment system for treating wastewater is connected with a liquid outlet of the pretreatment system, and the flue gas treatment system is connected with an exhaust port of the fermentation system. The cooperative treatment system is simple in structure and convenient to operate, integrates the technical advantages of organic garbage fermentation and pyrolysis, solves the problems that in the process of preparing biochar from organic garbage powder, dust is large, tar is large, and smoke secondary pollution is not easy to control, and can be used for treating various organic solid wastes.

Description

Technical Field

[0001] The utility model relates to the technical field of organic solid waste resource processing, in particular to an organic solid waste collaborative processing system. Background Art

[0002] Organic solid waste such as restaurant waste, kitchen waste, and garden waste is the main pollutant of urban organic waste. It is not only an important source of pollution in today's environment, but also the only growing "resource" in the world. At present, the widely used methods for resource treatment of organic solid waste at home and abroad include incineration, anaerobic digestion, aerobic composting, pyrolysis, etc., but due to the incomplete classification of organic waste in my country, the sources of organic waste are complex, the composition varies greatly, and it often contains plastics, waste glass, metals, etc., resulting in poor adaptability of a single disposal technology.

[0003] Composting of food waste contains high levels of oil and salt, which affects the use of the product; direct drying and pyrolysis of organic waste will produce a large amount of tar and dust, and the secondary pollution of flue gas is difficult to control, and engineering application is difficult. Many factors have made it difficult for my country to make major breakthroughs in the comprehensive utilization of organic waste. At present, how to achieve coordinated treatment of organic solid waste is the main problem that cities urgently need to solve.

[0004] Therefore, it is necessary to design a coordinated treatment system for organic solid waste to overcome the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide an organic solid waste collaborative treatment system with a simple structure and easy operation. It integrates the technical advantages of organic waste fermentation and pyrolysis, solves the problems of large dust, high tar content and difficult to control secondary pollution of flue gas in the process of preparing biochar from organic waste powder, and can be used to treat various organic solid wastes.

[0006] The utility model provides a system for coordinating the treatment of organic solid wastes, comprising: a pretreatment system, a fermentation system, a granulation device, a pyrolysis furnace, a flue gas treatment system and a leachate treatment system, wherein the pretreatment system is used for pretreatment of organic solid wastes by crushing and dehydrating, and the generated waste residues and waste water are discharged from a discharge port and a liquid outlet arranged thereon respectively; the feed end of the fermentation system is connected with the discharge port of the pretreatment system, and is used for fermentation treatment of the waste residues, and the fermentation system is provided with an exhaust port; the feed end of the granulation device is connected with the discharge end of the fermentation system, and is used for granulating the fermented waste residues to obtain waste residue particles; the feed end of the pyrolysis furnace is connected with the discharge end of the granulation device, and is used for high-temperature pyrolysis of the waste residue particles, and the pyrolysis furnace is provided with an exhaust port and an exhaust port; the leachate treatment system for treating waste water is connected with the liquid outlet of the pretreatment system, and the flue gas treatment system is connected with the exhaust port of the fermentation system, and is used for desulfurization and denitrification treatment of the discharged gas.

[0007] Furthermore, the pretreatment system includes a lifting device, a plate chain conveying device and a crushing and dehydrating device which are connected in sequence, the discharge port of the crushing and dehydrating device is connected to the feed end of the fermentation system, and the liquid outlet of the crushing and dehydrating device is connected to the leachate treatment system.

[0008] Furthermore, the fermentation system is provided with a circulating water inlet and outlet for heating, and a heat exchange system is provided with a water inlet and a water outlet. The water inlet and water outlet of the heat exchange system are respectively connected to the water outlet and water inlet of the fermentation system, so as to heat the circulating water entering the fermentation system.

[0009] Furthermore, the leachate treatment system comprises an oil-water separator and a sewage purification device which are connected in sequence, and the liquid inlet end of the oil-water separator is connected to the liquid outlet of the pretreatment system.

[0010] Furthermore, the flue gas treatment system includes a denitrification device and a desulfurization device which are connected in sequence, and the air inlet of the denitrification device is connected to the exhaust port of the fermentation system.

[0011] Furthermore, the fermentation system, the granulation device and the pyrolysis furnace are connected via a conveying device.

[0012] Furthermore, a cooling device is provided at the discharge port of the pyrolysis furnace for cooling the waste slag particles after pyrolysis.

[0013] Furthermore, the gas outlet of the pyrolysis furnace is connected to a pyrolysis gas utilization device to recover the heat of the pyrolysis gas.

[0014] Furthermore, the gas outlet of the pyrolysis furnace is connected to the flue gas treatment system.

[0015] The utility model has the following advantages and beneficial effects: it can realize the coordinated treatment of different types of organic solid wastes, dehydrate and extract oil from restaurant waste and kitchen waste with high moisture content, and then conduct pyrolysis after coordinated fermentation and granulation with various pretreated organic wastes, utilize microorganisms to reduce the moisture content and organic matter of organic materials, greatly reduce the amount of dust and tar generated during the pyrolysis process, and solve the problems of high energy consumption, high tar content and serious secondary pollution of traditional technologies.

[0016] Part of the pyrolysis gas is burned to supply the pyrolysis furnace, and the remaining high-temperature pyrolysis gas is recycled for the fermentation system through heat exchange. The biochar at the bottom of the pyrolysis furnace is cooled in a nitrogen protection jacket and then packaged. The gas generated in the process is desulfurized and denitrified before being discharged in compliance with emission standards, thus reducing pollution emissions. Oily wastewater is treated and discharged in compliance with emission standards after oil extraction. Pyrolysis biochar is reused for land improvement. The technical advantages of organic waste fermentation and pyrolysis are integrated to maximize the resource utilization of organic solid waste, making it suitable for the treatment of various organic solid wastes. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural schematic diagram of an organic solid waste collaborative treatment system according to a preferred embodiment of the utility model;

[0018] Description of Figure Numbers:

[0019] 1. Pretreatment system, 11. Lifting device, 12. Plate chain conveyor, 13. Crushing and dehydration device,

[0020] 2. Fermentation system, 21. Exhaust port, 22. Water inlet, 23. Water outlet,

[0021] 3. Granulation device,

[0022] 4. Pyrolysis furnace,

[0023] 5. Flue gas treatment system, 51. Denitrification device, 52. Desulfurization device,

[0024] 6. Leachate treatment system, 61. Oil-water separator, 62. Sewage purification device,

[0025] 7. Heat exchange system, 71. Water inlet, 72. Water outlet,

[0026] 8. Conveying device,

[0027] 9. Cooling device,

[0028] 10. Pyrolysis gas utilization device. DETAILED DESCRIPTION

[0029] For a better understanding of the present invention, the following embodiments are further explanations of the present invention, but the content of the present invention is not limited to the following embodiments.

[0030] like Figure 1 As shown, a system for coordinated treatment of organic solid waste includes: a pretreatment system 1, a fermentation system 2, a granulation device 3, a pyrolysis furnace 4, a flue gas treatment system 5 and a leachate treatment system 6.

[0031] Among them, the pretreatment system 1 is used for crushing and dehydrating organic solid waste for pretreatment, and waste residue and waste water are generated after treatment, which are discharged from the discharge port and liquid outlet arranged thereon respectively; the feed end of the fermentation system 2 is connected to the discharge port of the pretreatment system 1, which is used for fermentation treatment of the waste residue, and the fermentation system 2 is provided with an exhaust port 21; the feed end of the granulation device 3 is connected to the discharge end of the fermentation system 2, which is used for granulating the fermented waste residue to obtain waste residue particles; and the feed end of the pyrolysis furnace 4 is connected to the discharge end of the granulation device 3, which is used for high-temperature pyrolysis of the waste residue particles, and the pyrolysis furnace 4 is provided with an exhaust port and an exhaust port; the leachate treatment system 6 is used for treating waste water, and is connected to the liquid outlet of the pretreatment system 1; the flue gas treatment system 5 is connected to the exhaust port 21 of the fermentation system 2, which is used for desulfurization and denitrification treatment of the discharged gas.

[0032] The organic waste enters the pretreatment system 1, where it is crushed and dehydrated to obtain waste residue and wastewater. The waste residue first enters the fermentation system 2 for fermentation to further reduce the moisture content and organic matter; then it enters the granulation device 3 for granulation to obtain waste residue particles; then it enters the pyrolysis furnace 4 for high-temperature pyrolysis. The pyrolysis temperature is controlled to be 600-800°C, and the pyrolysis time is controlled to be 20-30 minutes. The organic matter is fully cracked, and the generated pyrolysis gas is discharged from the gas outlet, which can greatly reduce the amount of dust and tar generated during pyrolysis, solving the problems of high energy consumption, high tar content, and serious secondary pollution. The pyrolyzed waste residue particles are biochar, which can be reused for land improvement, thereby maximizing the resource utilization of organic solid waste.

[0033] like Figure 1 As shown, the pretreatment system 1 includes a lifting device 11, a plate chain conveying device 812 and a crushing and dehydrating device 13 which are connected in sequence, the discharge port of the crushing and dehydrating device 13 is connected to the feed end of the fermentation system 2, and the liquid outlet of the crushing and dehydrating device 13 is connected to the leachate treatment system 6; wherein, the chain plate conveying device 8 has a drainage function, and the leachate and the oily wastewater removed by the dehydration device both enter the leachate treatment system 6 for unified treatment.

[0034] At the same time, a circulating water inlet 22 and a water outlet 23 for heating are provided on the fermentation system 2, and a water inlet 71 and a water outlet 72 are provided on the heat exchange system 7. The water inlet 71 and the water outlet 72 of the heat exchange system 7 are respectively connected to the water outlet 23 and the water inlet 22 on the fermentation system 2, so as to heat the circulating water entering the fermentation system 2; wherein, the hot gas coming out of the subsequent outlet of the pyrolysis furnace 4 can be heat exchanged through the heat exchange system 7 to heat the circulating water entering the fermentation system 2, and then enter the flue gas treatment system 5 for treatment, which is more energy-saving and environmentally friendly.

[0035] In order to better treat the wastewater from the pretreatment system 1, the leachate treatment system 6 includes an oil-water separator 61 and a sewage purification device 62 connected in sequence. The liquid inlet end of the oil-water separator 61 is connected to the liquid outlet of the pretreatment system 1. The wastewater contains oil, which is extracted by the oil-water separator 61 and treated by the sewage purification device 62 before being discharged to protect the environment. At the same time, the flue gas treatment system 5 includes a denitrification device 51 and a desulfurization device 52 connected in sequence. The air inlet of the denitrification device 51 is connected to the exhaust port 21 of the fermentation system 2. The gas collected from the entire system is discharged after desulfurization and denitrification.

[0036] In this embodiment, a cooling device 9 is provided at the discharge port of the pyrolysis furnace 4, which is a nitrogen protection jacket for cooling the waste residue particles after pyrolysis, i.e., biochar. The heat absorbed by the cooling device 9 can be recycled and used in the heat exchange system 7 or the pyrolysis furnace 4. At the same time, the gas outlet of the pyrolysis furnace 4 is connected to the pyrolysis gas utilization device 10, which recovers the heat of the pyrolysis gas and feeds it back to the heat exchange system 7 or the pyrolysis furnace 4. The pyrolysis gas utilization device 10 is a natural gas burner. After the pyrolysis system runs stably, the natural gas intake can be automatically adjusted according to the temperature, which greatly saves fuel. For the convenience of production, the fermentation system 2, the granulation device 3 and the pyrolysis furnace 4 are connected by a conveying device 8, which is simple and convenient, and the biochar material at the discharge port of the pyrolysis furnace 4 through the cooling device 9 can also be transported to the collection device through the conveying device 8, and can be subsequently used for land improvement and reuse.

[0037] The collaborative treatment system has a simple structure and is easy to operate. It integrates the technical advantages of organic waste fermentation and pyrolysis, solving the problems of large dust, high tar content, and difficult-to-control secondary pollution of flue gas in the process of preparing biochar from organic waste powder. It can be used to treat various organic solid wastes.

[0038] The above is only a preferred implementation of the present utility model, which certainly cannot be used to limit the scope of rights of the present utility model. It should be pointed out that for ordinary technicians in this technical field, several improvements and changes can be made without departing from the principle of the present utility model, and these improvements and changes are also regarded as the protection scope of the present utility model.

Claims

1. An organic solid waste collaborative treatment system, characterized in that: include: A pretreatment system, a fermentation system, a granulation device, a pyrolysis furnace, a flue gas treatment system and a leachate treatment system. The pretreatment system is used for crushing and dehydrating organic solid waste for pretreatment, and the generated waste residue and waste water are discharged from the discharge port and liquid outlet respectively arranged thereon; the feed end of the fermentation system is connected with the discharge port of the pretreatment system, and is used for fermenting the waste residue, and the fermentation system is provided with an exhaust port; the feed end of the granulation device is connected with the discharge end of the fermentation system, and is used for granulating the fermented waste residue to obtain waste residue particles; the feed end of the pyrolysis furnace is connected with the discharge end of the granulation device, and is used for high-temperature pyrolysis of the waste residue particles, and the pyrolysis furnace is provided with an exhaust port and an exhaust port; The leachate treatment system for treating wastewater is connected to the liquid outlet of the pretreatment system, and the flue gas treatment system is connected to the exhaust port of the fermentation system for desulfurization and denitrification of the exhausted gas.

2. The organic solid waste collaborative treatment system as claimed in claim 1, characterized in that: The pretreatment system includes a lifting device, a plate chain conveying device and a crushing and dehydrating device which are connected in sequence. The discharge port of the crushing and dehydrating device is connected to the feed end of the fermentation system, and the liquid outlet of the crushing and dehydrating device is connected to the leachate treatment system.

3. The organic solid waste collaborative treatment system as claimed in claim 1, characterized in that: The fermentation system is provided with a circulating water inlet and outlet for heating, and a heat exchange system is provided with a water inlet and a water outlet. The water inlet and water outlet of the heat exchange system are respectively connected to the water outlet and water inlet of the fermentation system, so as to heat the circulating water entering the fermentation system.

4. The organic solid waste collaborative treatment system as claimed in claim 1, characterized in that: The leachate treatment system comprises an oil-water separator and a sewage purification device which are connected in sequence, and the liquid inlet end of the oil-water separator is connected to the liquid outlet of the pretreatment system.

5. The organic solid waste collaborative treatment system as claimed in claim 1, characterized in that: The flue gas treatment system comprises a denitration device and a desulfurization device which are connected in sequence, and the air inlet of the denitration device is connected to the exhaust port of the fermentation system.

6. The organic solid waste collaborative treatment system as claimed in claim 1, characterized in that: The fermentation system, the granulation device and the pyrolysis furnace are connected through a conveying device.

7. The organic solid waste collaborative treatment system as claimed in claim 1, characterized in that: A cooling device is provided at the discharge port of the pyrolysis furnace to cool the waste slag particles after pyrolysis.

8. The organic solid waste collaborative treatment system as claimed in claim 1, characterized in that: The gas outlet of the pyrolysis furnace is connected to the pyrolysis gas utilization device to recover the heat of the pyrolysis gas.

9. The organic solid waste collaborative treatment system as claimed in claim 1, characterized in that: The gas outlet of the pyrolysis furnace is connected to the flue gas treatment system.

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