Roller fermentation system for treating kitchen garbage
By designing a system including crushing, oil removal and salt removal and roller fermentation devices, the problem of solid-liquid separation and stirring dead corners in kitchen waste treatment is solved, and efficient kitchen waste fermentation and resource utilization is achieved.
Patent Information
- Application Number
- CN202421832958.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-31
- Publication Date
- 2025-05-20
- Estimated Expiration
- 2034-07-31
AI Technical Summary
Existing kitchen waste fermentation equipment cannot effectively achieve solid-liquid separation, and open systems will produce wastewater and unpleasant gases, and the problem of stirring blind spots also affects the fermentation efficiency.
A roller fermentation system including a crushing device, an oil-dehydrating device, a roller fermentation device and a reactor is designed. The system uses crushing and extrusion to treat kitchen waste to achieve solid-liquid separation, and through the closed roller fermentation setting and the coordination of plates and fins, avoiding the blind spots of stirring.
It realizes effective solid-liquid separation of kitchen waste, avoids the diffusion of unpleasant gases, improves the uniformity and efficiency of the fermentation process, and is suitable for resource utilization.
Smart Images
Figure CN222886719U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of kitchen waste treatment equipment, in particular to a drum fermentation system for treating kitchen waste. Background Art
[0002] Kitchen waste, also known as "wet waste" or "perishable waste", mainly comes from household kitchens, restaurants and the food processing industry, and has the characteristics of high moisture content, high organic matter content and easy rotting. For example, vegetable leaves, fruit peels, eggshells, etc. all belong to kitchen waste. With the continuous improvement of the living standards of residents in China, how to balance the treatment efficiency and process economy and maximize the treatment of food waste and kitchen waste is gradually becoming a new problem faced by the domestic environmental sanitation industry.
[0003] At present, at home and abroad, the main processes for treating food waste and kitchen waste include landfill, incineration, composting, anaerobic digestion, feed conversion and reuse, preparation of biodiesel, etc. The main treatment direction is to convert food waste and kitchen waste into high-value organic matter raw materials. Among them, the landfill of kitchen waste is easy to produce malodors, and the leachate may pollute groundwater and soil, and at the same time, greenhouse gases such as methane and carbon dioxide will also be produced; although incineration can reduce the volume of waste and has a certain potential for energy recovery, the high moisture content of kitchen waste will affect the incineration efficiency and may produce harmful gases and dust, posing a threat to the environment and human health; therefore, it is particularly important to carry out resource utilization of kitchen waste, such as using biological methods such as black soldier flies to treat kitchen waste and convert kitchen waste into resources such as high-protein bait and organic fertilizer, as well as using kitchen waste for biogas power generation and composting.
[0004] The hazards of kitchen waste treatment are mainly reflected in environmental pollution and health risks. The disorderly collection, transportation and treatment of kitchen waste are likely to affect the urban appearance, pollute water quality, spread diseases, and may also pose potential food safety hazards. In addition, improper treatment of kitchen waste will produce greenhouse gases and exacerbate climate change. Therefore, it is of great significance to gradually establish a more perfect kitchen waste treatment system, such as promoting garbage classification, resource utilization and low-carbon treatment technologies, to reduce the negative impact on the environment and human health.
[0005] In the process of resource utilization, biological fermentation is a mild and environmentally friendly treatment method. By fermenting kitchen waste, the resource utilization of kitchen waste can be effectively carried out. However, the current fermentation equipment mainly has the following problems: First, kitchen waste is a mixture of solids, oils and water, and the current equipment cannot achieve direct solid-liquid separation, making the pretreatment process before fermentation complex; second, the open fermentation system will produce a large amount of wastewater and unpleasant gases when using biological fermentation technology, polluting the environment; third, when using a stirring shaft for stirring in the fermentation equipment, it is easy to produce stirring dead corners, which is not conducive to the progress of the fermentation process. Summary of the Invention
[0006] In view of this, the present utility model provides a drum fermentation system for treating kitchen waste, specifically a drum fermentation system provided with a crushing device, an oil and salt removal device, a drum fermentation device and a reactor. This drum fermentation system has the advantages of reasonable design, strong practicability and convenient use. Using this drum fermentation system, solid-liquid separation can be directly and effectively carried out, making the obtained solid more suitable for the fermentation process; and a closed drum fermentation setting is adopted to effectively avoid problems such as the diffusion of unpleasant gases. At the same time, through the rolling setting of the reaction cylinder and the settings of the scraper plate, the stirring shaft and the fins, the problem of stirring dead corners is effectively avoided.
[0007] Based on the prior art, the present utility model provides a drum fermentation system for treating kitchen waste, including a crushing device, an oil and salt removal device, a drum fermentation device and a reactor;
[0008] The outlet of the crushing device is connected to the inlet of the oil and salt removal device, the outlet of the oil and salt removal device is connected to the inlet of the drum fermentation device, and the solid outlet of the drum fermentation device is connected to the inlet of the reactor;
[0009] The drum fermentation device includes a reaction cylinder, and the reaction cylinder is arranged on a frame;
[0010] End cover A and end cover B are respectively arranged at both ends of the reaction cylinder, and the reaction cylinder is rotationally connected to end cover A and end cover B;
[0011] A gear ring is sleeved outside the reaction cylinder, a gear disk is arranged on the frame, and the gear disk meshes with the gear ring; the gear disk is connected to motor C, and the rotation of motor C drives the gear disk to rotate, and the gear disk drives the gear ring to rotate, thereby making the reaction cylinder rotate;
[0012] A stirring shaft is arranged inside the reaction cylinder, and the stirring shaft is fixedly connected to end cover A and end cover B; fins are arranged on the stirring shaft, and a scraper plate is arranged on the inner wall of the reaction cylinder;
[0013] The rotational setting of the reaction cylinder and the combined use of the scraper plate and the fins overcome the problem of stirring dead corners easily generated by the stirring shaft; during the rotation of the reaction cylinder, the scraper plate can make the material move with the rotation of the reaction cylinder, and the material at the top falls onto the fins when it reaches the top, and the fins further disperse the material to improve the mixing uniformity and facilitate the fermentation process.
[0014] Preferably, the crushing device includes a grinding box, and a double-blade screw is arranged inside the grinding box. The double-blade screw is connected to motor A outside the grinding box; the rotation of motor A drives the double-blade screw to rotate, which can more effectively crush and pulverize the solids in the kitchen waste and realize effective grinding and crushing of the kitchen waste in the grinding box.
[0015] Preferably, the degreasing and desalting device includes an extrusion box, outside which there is a motor B. The motor B is connected to a variable pitch screw located inside the extrusion box. A filter cartridge is sleeved outside the variable pitch screw, and both ends of the filter cartridge are connected to the two sides of the extrusion box respectively, enabling solids to move inside the filter cartridge.
[0016] There is a feed inlet on the extrusion box. The top of the feed inlet is connected to the outlet of the crushing device, and the bottom of the feed inlet is communicated with the inside of the filter cartridge. There is a slag discharge port on the side of the extrusion box, which is communicated with the inside of the filter cartridge. There is a liquid discharge port at the bottom of the extrusion box, and the liquid discharge port is connected to a centrifuge.
[0017] The kitchen waste after grinding and crushing enters the filter cartridge inside the extrusion box from the feed inlet. Under the movement of the variable pitch screw, the kitchen waste is extruded. The solid part moves along with the variable pitch screw and is discharged through the slag discharge port. The liquid passes through the filter cartridge and then enters the centrifuge through the liquid discharge port, where rapid separation of water and oil is carried out under the action of the centrifuge, thus realizing the separation of solids, oil, and water. After subsequent processing, it can be reused.
[0018] Preferably, the shape of the filter cartridge matches the shape of the variable pitch screw, which is conducive to the extrusion process. The feed inlet is located inside the filter cartridge and near the large-diameter end of the variable pitch screw. As the extrusion process progresses, the solid part can move towards the small-diameter end along with the rotation of the variable pitch screw and be discharged from the slag discharge port at the small-diameter end.
[0019] Preferably, the baffle is a spiral baffle, and the included angle between the center line of the baffle and the axis of the reaction cylinder is 50°. To ensure the strength and service life of the baffle, the baffle is made of stainless steel plate. While rotating with the reaction cylinder, the baffle can scoop up the materials, which can not only avoid the generation of stirring dead angles inside the reaction cylinder but also prevent the materials from accumulating at one end of the drum. During the lifting and falling process, the materials can be fully mixed, and the contact between the materials and oxygen can be increased to strengthen the effect of aerobic fermentation experiments.
[0020] Preferably, the reaction cylinder is a seamless welded cylinder made of 304 stainless steel, which has high strength and stiffness. To avoid being corroded and affecting the service life of the reaction cylinder, the inner surface of the reaction cylinder is polished. To improve the heat preservation effect of the reaction cylinder, the reaction cylinder is provided with an inner layer and an outer layer, and a polyurethane heat preservation layer with a thickness of 18 - 19 mm is filled between the inner layer and the outer layer.
[0021] Preferably, at least one limiting ring and a supporting wheel are sleeved outside the reaction cylinder. The supporting wheel and the limiting ring cooperate with each other, and during the rotation of the reaction cylinder, the friction of the reaction cylinder can be greatly reduced, and the service life of the drum fermentation device can be prolonged.
[0022] Preferably, a jacket is sleeved outside the reactor. By introducing cold and hot media into the jacket, the temperature inside the reactor is controlled, thereby achieving the purpose of treating the fermentation product.
[0023] Compared with the prior art, the beneficial effects of the present utility model are as follows: by arranging a variable pitch screw inside the oil and salt removal device and a filter cartridge outside the variable pitch screw, the material entering the filter cartridge can be extruded to achieve the purpose of liquid-solid separation, which is beneficial to the fermentation of subsequent solids; by arranging a drum fermentation device, the solid material after oil and salt removal can be fermented. By sleeving a gear ring outside the reaction cylinder and arranging a gear disk cooperating with the gear ring, it is beneficial to drive the gear ring to rotate by motor C and then drive the reaction cylinder to roll. Cooperating with the lifter inside the reaction cylinder and the fins on the stirring shaft, the problem of stirring dead corners easily generated by the traditional stirring shaft is overcome; during the rotation of the reaction cylinder, the lifter can make the material move with the rotation of the reaction cylinder. When the material reaches the top, it falls onto the fins, and the fins further disperse the material, improving the mixing uniformity and being beneficial to the progress of the fermentation process. The above settings make the drum fermentation system have the advantages of reasonable design, strong practicability and convenient use. Using this drum fermentation system can directly and effectively separate solids and liquids, making the obtained solids more suitable for the fermentation process; and adopting a closed drum fermentation setting can effectively avoid problems such as the diffusion of unpleasant gases. At the same time, through the rolling setting of the reaction cylinder and the settings of the lifter, the stirring shaft and the fins, the problem of stirring dead corners is effectively avoided. Description of the Drawings
[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0025] Figure 1 It is a structural schematic diagram of the present utility model.
[0026] Figure 2 It is a structural diagram of the drum fermentation device.
[0027] In the figure, 101 - grinding box, 102 - double - blade screw, 103 - motor A, 201 - extrusion box, 202 - motor B, 203 - variable pitch screw, 204 - filter cartridge, 3 - feed inlet, 4 - slag discharge port, 5 - liquid discharge port, 6 - centrifuge, 701 - reaction cylinder, 702 - frame, 703 - end cover A, 704 - end cover B, 8 - gear ring, 9 - gear disk, 10 - motor C, 11 - stirring shaft, 12 - fins, 13 - lifter, 14 - heat - insulating layer, 15 - limit ring, 16 - supporting wheel, 17 - jacket, 18 - primary reactor, 19 - secondary reactor, 20 - tertiary reactor, 21 - quaternary reactor. Detailed implementation manners
[0028] In order to enable those skilled in the art of this technology to better understand the technical solutions in the present utility model, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0029] Combined with Figure 1 - Figure 2 , the present utility model provides a drum fermentation system for treating kitchen waste, including a crushing device, an oil and salt removal device, a drum fermentation device and a reactor;
[0030] The crushing device includes a grinding box 101, in which a double-blade screw 102 is provided. The double-blade screw 102 is connected to a motor A 103 outside the grinding box 101; the motor A 103 drives the double-blade screw 102 to rotate, which can more effectively break and pulverize the solids in the kitchen waste, and realize the effective grinding and crushing of the kitchen waste in the grinding box 101;
[0031] The oil and salt removal device includes an extrusion box 201, outside which a motor B 202 is provided. The motor B 202 is connected to a variable pitch screw 203. The variable pitch screw 203 is located inside the extrusion box 201, and a filter cylinder 204 is sleeved outside the variable pitch screw 203. The two ends of the filter cylinder 204 are respectively connected to the two sides of the extrusion box 201, so that the solids move inside the filter cylinder 204;
[0032] On the extrusion box 201, a feed port 3 is provided. The top of the feed port 3 is connected to the outlet of the crushing device, and the bottom of the feed port 3 is communicated with the inside of the filter cylinder 204; on the side of the extrusion box 201, a slag discharge port 4 is provided, and the slag discharge port 4 is communicated with the inside of the filter cylinder 204; on the bottom of the extrusion box 201, a liquid discharge port 5 is provided, and the liquid discharge port 5 is connected to a centrifuge 6;
[0033] The ground and crushed kitchen waste enters the filter cylinder 204 in the extrusion box 201 from the feed port 3. Under the movement of the variable pitch screw 203, the kitchen waste is extruded. The solid part moves along with the variable pitch screw 203 and is discharged through the slag discharge port 4. The liquid passes through the filter cylinder 204 and then enters the centrifuge 6 through the liquid discharge port 5. Under the action of the centrifuge 6, the water and oil are quickly separated, thus realizing the separation of solid, oil and water; after subsequent processing, it can be reused;
[0034] The shape of the filter cartridge 204 matches the shape of the variable pitch screw 203, which is conducive to the extrusion process; the feed inlet 3 is located inside the filter cartridge 204 and near the large diameter end of the variable pitch screw 203. As the extrusion process proceeds, the solid part can move towards the small diameter end with the rotation of the variable pitch screw 203 and be discharged from the slag discharge port 4 at the small diameter end;
[0035] The slag discharge port 4 of the oil and salt removal device is connected to the inlet of the drum fermentation device;
[0036] The drum fermentation device includes a reaction cylinder 701, and the reaction cylinder 701 is arranged on a frame 702;
[0037] At both ends of the reaction cylinder 701, there are respectively provided an end cover A 703 and an end cover B 704, and the reaction cylinder 701 is rotationally connected to the end cover A 703 and the end cover B 704;
[0038] A gear ring 8 is sleeved outside the reaction cylinder 701, and a gear disk 9 is arranged on the frame 702. The gear disk 9 meshes with the gear ring 8; the gear disk 9 is connected to a motor C 10. By driving the gear disk 9 to rotate through the motor C 10, the gear disk 9 drives the gear ring 8 to rotate, thereby rotating the reaction cylinder 701;
[0039] A stirring shaft 11 is arranged inside the reaction cylinder 701, and the stirring shaft 11 is fixedly connected to the end cover A 703 and the end cover B 704; fins 12 are arranged on the stirring shaft 11, and a lifter 13 is arranged on the inner wall of the reaction cylinder 701;
[0040] The rotational setting of the reaction cylinder 701 and the combined use of the lifter 13 and the fins 12 overcome the problem of stirring dead angles easily generated by the stirring shaft 11; during the rotation of the reaction cylinder 701, the lifter 13 can make the material move with the rotation of the reaction cylinder 701. When the material reaches the top, it falls onto the fins 12, and the fins 12 further disperse the material, improving the mixing uniformity and being conducive to the fermentation process;
[0041] The lifter 13 is a spiral lifter 13, and the central line of the lifter 13 forms an angle of 50° with the axis of the reaction cylinder 701; to ensure the strength and service life of the lifter 13, the lifter 13 is made of stainless steel plate; while rotating with the reaction cylinder 701, the lifter 13 can scoop up the material, which can not only avoid the generation of stirring dead angles in the reaction cylinder 701, but also prevent the material from accumulating at one end of the drum. During the lifting and falling process, the material can be fully mixed, and the contact between the material and oxygen can be increased to strengthen the effect of the aerobic fermentation experiment;
[0042] The reaction cylinder 701 is a seamless welded cylinder made of 304 stainless steel, which has high strength and stiffness. To avoid corrosion and affect the service life of the reaction cylinder 701, the inner surface of the reaction cylinder 701 is polished. To improve the heat preservation effect of the reaction cylinder 701, the reaction cylinder 701 is provided with an inner layer and an outer layer, and a polyurethane heat preservation layer 14 is filled between the inner layer and the outer layer. The thickness of the polyurethane heat preservation layer 14 is 18 mm.
[0043] Two limiting rings 15 are sleeved outside the reaction cylinder 701, and the limiting rings 15 are located on both sides of the gear ring 8. Supporting wheels 16 corresponding to the limiting rings 15 are provided on the frame 702. The supporting wheels 16 and the limiting rings 15 cooperate with each other. During the rotation of the reaction cylinder 701, the friction of the reaction cylinder 701 can be greatly reduced, and the service life of the drum fermentation device can be prolonged.
[0044] A jacket 17 is sleeved outside the reactor. By introducing cold and hot media into the jacket 17, the temperature inside the reactor is controlled, so as to achieve the purpose of treating the fermentation products.
[0045] In this embodiment, four reactors are provided, namely a primary reactor 18, a secondary reactor 19, a tertiary reactor 20, and a quaternary reactor 21. The solid outlet of the drum fermentation device is connected to the inlet of the primary reactor 18. The gas outlet of the primary reactor 18 is connected to the gas inlet of the secondary reactor 19. The gas outlet of the secondary reactor 19 is connected to the gas inlet of the tertiary reactor 20. The gas outlet of the tertiary reactor 20 is connected to the gas inlet of the quaternary reactor 21.
[0046] When the fermented material enters the primary reactor 18, by introducing hot media into the jacket 17, the temperature inside the primary reactor 18 is raised to 50 °C. At this temperature, the organic substances in the material begin to undergo cracking reactions, that is, the molecular structure is broken, and smaller molecules are generated. These smaller molecules are mainly some gaseous or liquid hydrocarbons, such as methane, ethane, propane, butane, benzene, toluene, ethylbenzene, etc. These hydrocarbons enter the secondary reactor 19 with the gas flow from the gas outlet, while the solid residue in the primary reactor 18 is discharged from the discharge port for recycling or disposal.
[0047] Hot media is introduced into the jacket 17 of the secondary reactor 19 to raise its internal temperature to 60 °C, and at the same time, air is injected from the gas inlet of the secondary reactor 19. Under the action of this temperature and oxygen, the hydrocarbons undergo oxidation reactions, that is, they combine with oxygen to generate carbon monoxide, carbon dioxide, water vapor, etc. These gases enter the tertiary reactor 20 with the gas flow from the gas outlet. Among them, the heat generated during the process can be recycled and used to provide heat energy for other reactors.
[0048] Heat medium is introduced into the jacket 17 of the tertiary reactor 20 to raise its internal temperature to 70 °C. At the same time, water vapor is injected from the air inlet. Under the action of this temperature and water vapor, the water-gas shift reaction of carbon monoxide occurs, that is, it combines with water vapor to generate partial carbon dioxide and hydrogen with higher combustibility. These gases enter the quaternary reactor 21 from the air outlet along with the gas flow;
[0049] Heat medium is introduced into the jacket 17 of the quaternary reactor 21 to raise its internal temperature to 80 °C. At the same time, a catalyst is injected from the air inlet. The catalyst in this embodiment is an alloy powder mixed by iron, nickel, and cobalt according to a weight ratio of 1:2:1.5, which has high catalytic activity and stability; under the action of this temperature and catalyst, the catalytic cracking reaction of carbon dioxide occurs, that is, it decomposes into carbon monoxide and carbon atoms. Among them, the carbon atoms are deposited on the surface of the catalyst in a solid state to form carbon black; the carbon monoxide undergoes a catalytic reforming reaction with other incompletely cracked hydrocarbons, that is, it recombines into hydrocarbons with different types and structures; these hydrocarbons are mainly some liquid or solid hydrocarbons or aromatic compounds, such as n-hexane, cyclohexane, naphthalene, phenanthrene, etc. These carbon black and hydrocarbons are discharged from the discharge port along with the catalyst for separation and purification; finally, the gas coming out of the quaternary reactor 21 is cooled and purified to obtain synthesis gas with higher combustibility. This synthesis gas is mainly composed of about 50% methane and about 50% hydrogen, which can be directly used as fuel or can be used to prepare products with higher added value through further conversion processes, such as liquid fuels, alcohols, ketones, etc.
[0050] Using the drum fermentation system provided by the present utility model to treat kitchen waste can produce valuable products including: ① synthetic oil, about 400 kg of synthetic oil can be produced for every 1 t of solid waste treated; ② carbon black: about 200 kg of carbon black can be produced for every 1 t of solid waste treated; ③ synthesis gas: about 700 m 3 of synthesis gas can be produced for every 1 t of solid waste treated.
[0051] The above has introduced the present utility model in detail. The "upper", "lower", "left", and "right" in this embodiment are described relative to the positions in the attached drawings of the specification. Although the present utility model has been described in detail by referring to the attached drawings and in combination with the preferred embodiments, the present utility model is not limited thereto. Without departing from the spirit and essence of the present utility model, those of ordinary skill in the art can make various equivalent modifications or substitutions to the embodiments of the present utility model, and these modifications or substitutions should all be within the scope covered by the present utility model / Any person familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present utility model, and all should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claims.
Claims
1. A drum fermentation system for processing kitchen waste, characterized in that: It includes a crushing device, an oil and salt removal device, a drum fermentation device and a reactor; The outlet of the pulverizing device is connected to the inlet of the deoiling and desalting device, the outlet of the deoiling and desalting device is connected to the inlet of the drum fermentation device, and the solid outlet of the drum fermentation device is connected to the inlet of the reactor; The drum fermentation device comprises a reaction cylinder, which is arranged on a frame; An end cap A and an end cap B are respectively provided at both ends of the reaction tube, and the reaction tube is rotatably connected to the end cap A and the end cap B; A gear ring is sleeved on the outside of the reaction cylinder, and a gear disc is provided on the frame, the gear disc is meshed with the gear ring; the gear disc is connected to the motor C; A stirring shaft is arranged inside the reaction tube, and the stirring shaft is fixedly connected with the end cover A and the end cover B; fins are arranged on the stirring shaft, and a lifting plate is arranged on the inner wall of the reaction tube.
2. The drum fermentation system for processing kitchen waste according to claim 1, characterized in that: The pulverizing device comprises a grinding box, in which a double-blade spiral is arranged, and the double-blade spiral is connected to a motor A outside the grinding box.
3. The drum fermentation system for processing kitchen waste according to claim 1, characterized in that: The deoiling and desalting device comprises an extrusion box, a motor B is arranged outside the extrusion box, a variable pitch screw is connected to the motor B, the variable pitch screw is arranged inside the extrusion box, a filter cartridge is sleeved outside the variable pitch screw, and two ends of the filter cartridge are respectively connected to two sides of the extrusion box; A feed port is provided on the extrusion box, the top of which is connected to the outlet of the crushing device, and the bottom of which is connected to the interior of the filter cartridge; a slag discharge port is provided on the side of the extrusion box, and the slag discharge port is connected to the interior of the filter cartridge; a liquid discharge port is provided at the bottom of the extrusion box, and the liquid discharge port is connected to a centrifuge.
4. The drum fermentation system for processing kitchen waste according to claim 3, characterized in that: The shape of the filter cartridge matches the shape of the variable pitch screw; the feed port is located inside the filter cartridge and close to the large diameter end of the variable pitch screw.
5. The drum fermentation system for processing kitchen waste according to claim 1, characterized in that: The copying plate is a spiral copying plate, the angle between the center line of the copying plate and the axis of the reaction tube is 50°, and the copying plate is a stainless steel plate.
6. The drum fermentation system for treating kitchen waste according to claim 1, characterized in that: The reaction tube is a 304 stainless steel seamless welded tube; the reaction tube is provided with an inner layer and an outer layer, a polyurethane insulation layer is filled between the inner layer and the outer layer, and the thickness of the polyurethane insulation layer is 18-19 mm.
7. The drum fermentation system for treating kitchen waste according to claim 1, characterized in that: At least one limiting ring and a supporting wheel are sleeved on the outside of the reaction cylinder, and the supporting wheel cooperates with the limiting ring.
8. The drum fermentation system for processing kitchen waste according to claim 1, characterized in that: The outer shell of the reactor is provided with a jacket.