Anaerobic fermentation equipment for kitchen waste

Abstract

The present invention discloses an anaerobic fermentation equipment for kitchen waste, including a fermentation tank body, a heat exchange device and a heat supply device, the fermentation tank body is equipped with a stirring device, the fermentation tank body is sequentially provided with a heating zone, a fermentation zone and a discharge zone which are interconnected, the heating zone is provided with a first hollow interlayer, the first hollow interlayer is provided with a first heat exchange circulation pipe inside; the fermentation zone is provided with a second hollow interlayer, the second hollow interlayer is provided with a second heat exchange circulation pipe inside; the discharge zone is provided with a third hollow interlayer, the third hollow interlayer is provided with a third heat exchange circulation pipe inside; the heat exchange device is provided with a heat supply channel, a first heat exchange channel, a second heat exchange channel and a third heat exchange channel inside, and both ends of the heat supply channel are connected to the heat supply device. The present invention can prevent local accumulation of materials, improve the heating effect of materials, increase the temperature uniformity of materials inside the fermentation tank body, reduce equipment operation costs, and improve economic benefits.

Description

Technical Field

[0001] The invention belongs to the technical field of garbage disposal, and in particular relates to anaerobic fermentation equipment for kitchen waste. Background Art

[0002] With the implementation of garbage classification, the resource utilization of kitchen waste is imminent. Kitchen waste refers to perishable, organic household waste, including household kitchen waste, restaurant kitchen waste and other kitchen waste, etc. Its main sources are household kitchens, restaurants, canteens, markets and other industries related to food processing. Compared with restaurant kitchen waste, kitchen waste has the characteristics of high solid content, high organic matter content, high impurity content, high fiber content, etc., and its composition is more complex and varied.

[0003] At present, the main kitchen waste treatment processes at home and abroad include landfill, incineration, anaerobic fermentation, aerobic composting and bioprotein conversion. Among them, the anaerobic fermentation process can produce methane in the process of harmless and reduced treatment of organic matter, effectively realizing the resource utilization of kitchen waste, so more and more kitchen waste is treated by anaerobic fermentation. As one of the anaerobic fermentation technologies, dry anaerobic, compared with the common wet anaerobic, its feed solid content is usually above 20%, with strong impurity tolerance, low requirements on feed properties, and can reduce the investment in front-end pretreatment equipment. At the same time, no fresh water is added for mixing during dry anaerobic fermentation, so it saves more water resources, and the amount of biogas slurry produced is significantly less than that of wet anaerobic fermentation, reducing the cost of wastewater treatment. The fermentation product is easy to dehydrate to produce biogas solids, which can be used as organic fertilizer for agricultural production, and basically achieve zero discharge of pollutants.

[0004] During dry anaerobic fermentation, temperature has a significant impact on the growth of anaerobic microorganisms, the kinetics and stability of the reaction process, and biogas production. The suitable temperature range for anaerobic fermentation is 30-35℃ (medium temperature) and 50-55℃ (high temperature). Too low a temperature will inhibit the growth of microorganisms, reduce the utilization rate of reactants and the production of biogas. Too high a temperature will easily lead to the accumulation of ammonia nitrogen, inhibit the growth of methanogens, and reduce methane production. Mesophilic anaerobic digestion requires less energy and is more stable, and is more commonly used. 35-37℃ is the optimal reaction range.

[0005] In order to enable the fermented materials to quickly reach the temperature required for fermentation, effective heating measures must be taken to maintain the biological activity of anaerobic bacteria and keep the temperature change of the materials within the allowable range during the entire fermentation period. Therefore, a heating device is required. For dry reactors, the commonly used heating device is built-in coil heating. Since dry anaerobic fermentation garbage has the characteristics of high concentration and high viscosity, during the heating process using built-in coils or coils, local accumulation and hanging of materials are likely to occur around the built-in coils or coils, which not only affects the heat transfer effect, but also causes uneven temperature of the materials in the reactor, preventing the materials from fully entering the anaerobic fermentation condition, affecting the degradation rate of the garbage. Summary of the invention

[0006] The purpose of the present invention is to provide an anaerobic fermentation device for kitchen waste, which is used to solve the above-mentioned problems existing in the prior art.

[0007] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: an anaerobic fermentation device for kitchen waste, comprising a fermentation tank body, a heat exchange device and a heat supply device, wherein the fermentation tank body is equipped with a stirring device, and the fermentation tank body is sequentially provided with a heating zone, a fermentation zone and a discharge zone which are interconnected, the heating zone is provided with a first hollow interlayer, and a first heat exchange circulation pipe is provided inside the first hollow interlayer; the fermentation zone is provided with a second hollow interlayer, and a second heat exchange circulation pipe is provided inside the second hollow interlayer; the discharge zone is provided with a third hollow interlayer, and a heat exchange circulation pipe is provided inside the third hollow interlayer; A third heat exchange circulation pipe is provided in the heat exchange device; a heat supply channel, a first heat exchange channel, a second heat exchange channel and a third heat exchange channel are provided inside the heat exchange device, both ends of the heat supply channel are connected to the heat supply device, and the media in the first heat exchange channel, the second heat exchange channel and the third heat exchange channel can exchange heat with the medium in the heat supply channel, both ends of the first heat exchange channel are respectively connected to both ends of the first heat exchange circulation pipe, both ends of the second heat exchange channel are respectively connected to both ends of the second heat exchange circulation pipe, and both ends of the third heat exchange channel are respectively connected to both ends of the third heat exchange circulation pipe.

[0008] As an optional implementation of the above technical solution, the heat exchange device includes a heat exchange shell, the interior of the heat exchange shell is hollow to form the heat supply channel, the heat supply channel is provided with a first heat exchange tube, a second heat exchange tube and a third heat exchange tube, the first heat exchange channel is provided inside the first heat exchange tube, the first heat exchange tube is located upstream of the heat supply channel, the second heat exchange channel is provided inside the second heat exchange tube, the third heat exchange channel is provided inside the third heat exchange tube, and the second heat exchange tube and the third heat exchange tube are provided side by side downstream of the heat supply channel.

[0009] As an optional implementation manner of the above technical solution, the heat exchange shell is provided with a heat input interface, a heat output interface, a first heat exchange input interface, a first heat exchange output interface, a second heat exchange input interface, a second heat exchange output interface, a third heat exchange input interface and a third heat exchange output interface, and the two ends of the heat supply channel are respectively connected to the heat input interface and the heat output interface; the two ends of the first heat exchange tube are respectively connected to the first heat exchange input interface and the first heat exchange output interface, the two ends of the second heat exchange tube are respectively connected to the second heat exchange input interface and the second heat exchange output interface, and the two ends of the third heat exchange tube are respectively connected to the third heat exchange input interface and the third heat exchange output interface.

[0010] As an optional implementation of the above technical solution, the first heat exchange tube, the second heat exchange tube and the third heat exchange tube are all spiral.

[0011] As an optional implementation of the above technical solution, the heating device includes a hot water tank, a heater and a thermostat are provided inside the hot water tank, a heat input pipe and a heat output pipe are provided between the hot water tank and the heating channel, and a driving pump is provided on the heat input pipe.

[0012] As an optional implementation of the above technical solution, the stirring device includes a stirring shaft, which is connected to a driving mechanism, and the stirring shaft is sequentially provided with a first stirring blade assembly, a second stirring blade assembly and a third stirring blade assembly, the first stirring blade assembly is located in the heating zone, the second stirring blade assembly is located in the fermentation zone, and the third stirring blade assembly is located in the discharge zone.

[0013] As an optional implementation of the above technical solution, as an optional implementation of the above technical solution, a first flow-pushing mechanism is provided on the stirring shaft, the first flow-pushing mechanism is arranged between the first stirring blade assembly and the second stirring blade assembly, and the first flow-pushing mechanism is located at the junction of the heating zone and the fermentation zone.

[0014] As an optional implementation of the above technical solution, the first flow-pushing mechanism includes a first flow-pushing spiral blade, and the first flow-pushing spiral blade is arranged on the stirring shaft.

[0015] As an optional implementation of the above technical solution, a second flow-pushing mechanism is provided on the stirring shaft, the second flow-pushing mechanism is arranged between the second stirring blade assembly and the third stirring blade assembly, and the second flow-pushing mechanism is located at the junction of the fermentation area and the discharge area.

[0016] As an optional implementation of the above technical solution, the second flow-plugging mechanism includes a second flow-plugging spiral vane, and the second flow-plugging spiral vane is arranged on the stirring shaft.

[0017] As an optional implementation of the above technical solution, the first stirring blade assembly includes a first stirring blade A and a first stirring blade B, the first stirring blade A and the first stirring blade B are alternately arranged on the stirring shaft, the length of the first stirring blade A is greater than the length of the first stirring blade B, and the ends of the first stirring blade A and the first stirring blade B are both provided with a first stirring block, and the surface of the first stirring block is provided with a first grinding tooth.

[0018] As an optional implementation of the above technical solution, the second stirring blade assembly includes a plurality of second stirring blades, the plurality of second stirring blades are arranged at intervals on the stirring shaft, the ends of the plurality of second stirring blades are each provided with a second stirring block, and the surface of the second stirring block is provided with a second grinding tooth.

[0019] As an optional implementation of the above technical solution, the third stirring blade assembly includes multiple third stirring blades, and the multiple third stirring blades are arranged at intervals on the stirring shaft. The ends of the multiple third stirring blades are each provided with a third stirring block, and the surface of the third stirring block is provided with a third grinding tooth.

[0020] As an optional implementation of the above technical solution, the fermentation tank body includes an outer tank body and an inner tank body, the inner tank body is U-shaped, the inner tank body is arranged on the inner side of the outer tank body, and the first hollow interlayer, the second hollow interlayer and the third hollow interlayer are arranged between the inner tank body and the outer tank body.

[0021] As an optional implementation of the above technical solution, a gas outlet is provided at the top of the fermentation tank body, and a discharge port is provided at the bottom of the fermentation tank body.

[0022] The beneficial effects of the present invention are:

[0023] The present invention provides an anaerobic fermentation device for kitchen waste, wherein a first hollow interlayer is provided in a heating zone, a first heat exchange circulation pipe is provided inside the first hollow interlayer, a second hollow interlayer is provided in a fermentation zone, a second heat exchange circulation pipe is provided inside the second hollow interlayer, a third hollow interlayer is provided in a discharge zone, and a third heat exchange circulation pipe is provided inside the third hollow interlayer. According to the characteristics of dry anaerobic fermentation, the present invention divides the interior of a fermentation tank into a heating zone, a fermentation zone, and a discharge zone, and respectively configures a first heat exchange circulation pipe, a second heat exchange circulation pipe, and a third heat exchange circulation pipe, and utilizes a heat exchange device to transfer the heat of a heating device to a material, thereby realizing segmented heating of anaerobic fermentation, preventing local accumulation of materials, improving the heating effect of materials, increasing the temperature uniformity of materials inside the fermentation tank, reducing equipment operating costs, and improving economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of an anaerobic fermentation device for kitchen waste in one embodiment of the present invention;

[0025] Figure 2 is a schematic structural diagram of a heat exchange device and a heat supply device in one embodiment of the present invention;

[0026] Figure 3 is a schematic structural diagram of a stirring device in one embodiment of the present invention;

[0027] Figure 4 It is a schematic structural diagram of a fermentation tank body in one embodiment of the present invention.

[0028] In the figure: 1-fermentation tank body; 2-heat exchange device; 3-heat supply device; 4-stirring device; 5-heating zone; 6-fermentation zone; 7-discharge zone; 8-first heat exchange circulation pipe; 9-second heat exchange circulation pipe; 10-third heat exchange circulation pipe; 11-heat supply channel; 12-heat exchange shell; 13-first heat exchange pipe; 14-second heat exchange pipe; 15-third heat exchange pipe; 16-hot water tank; 17-heater; 18-heat supply input pipe; 19-heat supply output pipe; 20-drive pump; stirring shaft; 22-drive mechanism; 23-first plug flow spiral blade; 24-second plug flow spiral blade; 25-first stirring blade A; 26-first stirring blade B; 27-second stirring blade; 28-third stirring blade; 29-outer tank body; 30-inner tank body; 31-gas outlet; 32-discharge port. DETAILED DESCRIPTION

[0029] like Figure 1-Figure 4 As shown, this embodiment provides an anaerobic fermentation equipment for kitchen waste, including a fermentation tank body 1, a heat exchange device 2 and a heat supply device 3. The fermentation tank body 1 is equipped with a stirring device 4, and the stirring device 4 is arranged along the length direction of the fermentation tank body 1. The stirring device 4 mechanically stirs the garbage inside the fermentation tank body 1. Stirring is beneficial to uniformly distribute organic matter and transfer heat, and stirring during the fermentation process is helpful to reduce the size of reaction particles and exhaust gas.

[0030] A feed port is provided on the fermentation tank body 1, and a heating zone 5, a fermentation zone 6 and a discharge zone 7 are provided in the fermentation tank body 1 in sequence, which are interconnected. The heating zone 5, the fermentation zone 6 and the discharge zone 7 are arranged in sequence from left to right, and the material first enters the heating zone 5, then enters the fermentation zone 6, and then enters the discharge zone 7. The heating zone 5 is used to heat the material so that the material quickly reaches the fermentation temperature and improves the fermentation efficiency. The fermentation zone 6 is used to ferment the material, and the temperature of the fermentation zone 6 remains basically stable. The discharge zone 7 is used to discharge the fermented material, and the temperature of the discharge zone 7 remains basically stable.

[0031] like Figure 1As shown, the heating zone 5 is provided with a first hollow interlayer, a first heat exchange circulation pipe 8 is provided inside the first hollow interlayer, a heat medium is contained inside the first heat exchange circulation pipe 8, and the heat medium quickly heats the material in the heating zone 5 through the first heat exchange circulation pipe 8. The fermentation zone 6 is provided with a second hollow interlayer, a second heat exchange circulation pipe 9 is provided inside the second hollow interlayer, a heat medium is contained inside the second heat exchange circulation pipe 9, and the heat medium keeps the material in the fermentation zone 6 warm through the second heat exchange circulation pipe 9. The discharge zone 7 is provided with a third hollow interlayer, a third heat exchange circulation pipe 10 is provided inside the third hollow interlayer, a heat medium is contained inside the third heat exchange circulation pipe 10, and the heat medium keeps the material in the discharge zone 7 warm through the third heat exchange circulation pipe 10.

[0032] The heat exchange device 2 is provided with a heat supply channel 11, a first heat exchange channel, a second heat exchange channel and a third heat exchange channel. Both ends of the heat supply channel 11 are connected to the heat supply device 3. The media of the first heat exchange channel, the second heat exchange channel and the third heat exchange channel can exchange heat with the medium of the heat supply channel 11. Both ends of the first heat exchange channel are respectively connected to both ends of the first heat exchange circulation pipe 8, both ends of the second heat exchange channel are respectively connected to both ends of the second heat exchange circulation pipe 9, and both ends of the third heat exchange channel are respectively connected to both ends of the third heat exchange circulation pipe 10.

[0033] The heating device 3 transports a high-temperature medium such as high-temperature water into the heating channel 11, and the high-temperature water transfers heat to the water in the first heat exchange channel, the second heat exchange channel and the third heat exchange channel. The hot water in the first heat exchange circulation pipe 8 transfers heat to the material in the heating zone 5, the hot water in the second heat exchange circulation pipe 9 transfers heat to the material in the fermentation zone 6, and the hot water in the third heat exchange circulation pipe 10 transfers heat to the material in the discharge zone 7. The heating zone 5, the fermentation zone 6 and the discharge zone 7 are heated in different areas, which can effectively improve the heating efficiency of the material, increase the temperature uniformity of the material in the fermentation tank body 1, prevent local accumulation of the material, and improve the degradation rate of the material.

[0034] According to the characteristics of dry anaerobic fermentation, the present invention divides the interior of the fermentation tank body 1 into a heating zone 5, a fermentation zone 6 and a discharge zone 7, and respectively configures a first heat exchange circulation pipe 8, a second heat exchange circulation pipe 9 and a third heat exchange circulation pipe 10. The heat exchange device 2 is used to transfer the heat of the heating device 3 to the material, so as to realize the segmented heating of the anaerobic fermentation, prevent the local accumulation of the material, improve the heating effect of the material, increase the temperature uniformity of the material inside the fermentation tank body 1, reduce the equipment operation cost, and improve the economic benefit.

[0035] like Figure 4As shown, in a specific embodiment, the fermentation tank body 1 includes an outer tank body 29 and an inner tank body 30, the inner tank body 30 is U-shaped, the inner tank body 30 is arranged on the inner side of the outer tank body 29, the first hollow interlayer, the second hollow interlayer and the third hollow interlayer are arranged between the inner tank body 30 and the outer tank body 29, the first hollow interlayer corresponds to the heating area 5, the second hollow interlayer corresponds to the fermentation area 6, and the third hollow interlayer corresponds to the discharge area 7. A reinforcing plate is connected between the inner tank body 30 and the outer tank body 29 to ensure the structural strength of the fermentation tank body 1.

[0036] like Figure 1 As shown, the top of the fermentation tank body 1 is provided with a gas outlet 31, and the bottom of the fermentation tank body 1 is provided with a discharge port 32. The gas outlet 31 is arranged at the top of the discharge area 7 to facilitate the discharge of biogas. The discharge port 32 is arranged at the bottom of the discharge area 7 to facilitate the discharge of fermented materials.

[0037] like Figure 2 As shown, specifically, the heat exchange device 2 includes a heat exchange shell 12, the interior of the heat exchange shell 12 is hollow to form the heat supply channel 11, and the heat supply channel 11 is provided with a first heat exchange tube 13, a second heat exchange tube 14 and a third heat exchange tube 15, the first heat exchange tube 13 is provided with the first heat exchange channel, the first heat exchange tube 13 is located upstream of the heat supply channel 11, the second heat exchange tube 14 is provided with the second heat exchange channel, the third heat exchange tube 15 is provided with the third heat exchange channel, and the second heat exchange tube 14 and the third heat exchange tube 15 are arranged side by side downstream of the heat supply channel 11. In order to increase the heat exchange effect, the first heat exchange tube 13, the second heat exchange tube 14 and the third heat exchange tube 15 are all spiral. Since the temperature of the material is low when it just enters the heating zone 5, the material needs to be heated up quickly, so the temperature of the hot water in the first heat exchange tube 13 is relatively high. In the present invention, the first heat exchange tube 13 is located upstream of the heating channel 11, and the second heat exchange tube 14 and the third heat exchange tube 15 are arranged side by side downstream of the heating channel 11, so that the material in the heating zone 5 can be heated quickly, and the material in the fermentation zone 6 and the discharge zone 7 can be kept warm for a long time, and the heat energy of the heating device 3 is effectively utilized.

[0038] Among them, the heat exchange shell 12 is provided with a heat input interface, a heat output interface, a first heat exchange input interface, a first heat exchange output interface, a second heat exchange input interface, a second heat exchange output interface, a third heat exchange input interface and a third heat exchange output interface, and the two ends of the heat supply channel 11 are respectively connected to the heat input interface and the heat output interface; the two ends of the first heat exchange tube 13 are respectively connected to the first heat exchange input interface and the first heat exchange output interface, the two ends of the second heat exchange tube 14 are respectively connected to the second heat exchange input interface and the second heat exchange output interface, and the two ends of the third heat exchange tube 15 are respectively connected to the third heat exchange input interface and the third heat exchange output interface.

[0039] The heat input interface and the heat output interface are both connected to the heat supply device 3, and high-temperature water enters the heat supply channel 11 from the heat input interface, and then returns to the heat supply device 3 from the heat output interface, realizing water recycling. The first heat exchange input interface and the first heat exchange output interface are both connected to the first heat exchange circulation pipe 8, and hot water enters the first heat exchange circulation pipe 8 from the first heat exchange output interface, and then returns to the first heat exchange pipe 13 from the first heat exchange input interface, realizing the material heating function of the heating area 5. The second heat exchange input interface and the second heat exchange output interface are both connected to the second heat exchange circulation pipe 9, and hot water enters the second heat exchange circulation pipe 9 from the second heat exchange output interface, and then returns to the second heat exchange pipe 14 from the second heat exchange input interface, realizing the material heating function of the fermentation area 6. The third heat exchange input interface and the third heat exchange output interface are both connected to the third heat exchange circulation pipe 10, and hot water enters the third heat exchange circulation pipe 10 from the third heat exchange output interface, and then returns to the third heat exchange pipe 15 from the third heat exchange input interface, realizing the material heating function of the discharge area 7.

[0040] The heating device 3 includes a hot water tank 16, a heater 17 and a thermostat are provided inside the hot water tank 16, a heat input pipe 18 and a heat output pipe 19 are provided between the hot water tank 16 and the heat supply channel 11, and a driving pump 20 is provided on the heat input pipe 18. The heater 17 is used to heat the water in the hot water tank 16 to obtain high-temperature water, the thermostat controls the water temperature of the hot water tank 16, and the driving pump 20 drives the water to circulate between the hot water tank 16 and the heat exchange device 2.

[0041] like Figure 3 As shown, in a specific embodiment, the stirring device 4 includes a stirring shaft 21, the stirring shaft 21 is connected to a driving mechanism 22, and a first stirring blade assembly, a second stirring blade assembly and a third stirring blade assembly are sequentially arranged on the stirring shaft 21, the first stirring blade assembly is located in the heating zone 5, the second stirring blade assembly is located in the fermentation zone 6, and the third stirring blade assembly is located in the discharge zone 7. The driving mechanism 22 drives the stirring shaft 21 to rotate, the first stirring blade assembly stirs the material in the heating zone 5, the second stirring blade assembly stirs the material in the fermentation zone 6, and the third stirring blade assembly stirs the material in the discharge zone 7, so as to improve the temperature uniformity of the material and promote the degradation reaction of the material.

[0042] Specifically, the first stirring blade assembly includes a first stirring blade A25 and a first stirring blade B26, the first stirring blade A25 and the first stirring blade B26 are alternately arranged on the stirring shaft 21, the length of the first stirring blade A25 is greater than the length of the first stirring blade B26, the ends of the first stirring blade A25 and the first stirring blade B26 are both provided with a first stirring block, and the surface of the first stirring block is provided with a first grinding tooth. The first stirring blade A25 and the first stirring blade B26 are alternately arranged on the stirring shaft 21 to improve the temperature uniformity of the material, and the first grinding teeth can grind larger materials during the rotation process to enhance the fermentation treatment effect of the material.

[0043] The second stirring blade assembly includes a plurality of second stirring blades 27, which are arranged at intervals on the stirring shaft 21, and the ends of the plurality of second stirring blades 27 are each provided with a second stirring block, and the surface of the second stirring block is provided with a second grinding tooth. The third stirring blade assembly includes a plurality of third stirring blades 28, which are arranged at intervals on the stirring shaft 21, and the ends of the plurality of third stirring blades 28 are each provided with a third stirring block, and the surface of the third stirring block is provided with a third grinding tooth.

[0044] In a specific embodiment, a first flow-pushing mechanism is provided on the stirring shaft 21, the first flow-pushing mechanism is arranged between the first stirring blade assembly and the second stirring blade assembly, and the first flow-pushing mechanism is located at the junction of the heating zone 5 and the fermentation zone 6. The first flow-pushing mechanism is used to push the material in the heating zone 5 into the fermentation zone 6. Specifically, the first flow-pushing mechanism includes a first flow-pushing spiral blade 23, and the first flow-pushing spiral blade 23 is arranged on the stirring shaft 21. A second flow-pushing mechanism is provided on the stirring shaft 21, the second flow-pushing mechanism is arranged between the second stirring blade assembly and the third stirring blade assembly, and the second flow-pushing mechanism is located at the junction of the fermentation zone 6 and the discharge zone 7. The first flow-pushing mechanism is used to push the material in the fermentation zone 6 into the discharge zone 7. Specifically, the second flow-pushing mechanism includes a second flow-pushing spiral blade 24, and the second flow-pushing spiral blade 24 is arranged on the stirring shaft 21.

[0045] In the description of the present invention, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, and may be fixedly connected, detachably connected, or integrated; may be mechanically connected or electrically connected; may be directly connected or indirectly connected through an intermediate medium, may be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood. In addition, the specific features, structures, etc. described in the embodiments are included in at least one embodiment. Under the condition that there is no contradiction, those skilled in the art may combine the features of different embodiments. The protection scope of the present invention is not limited to the above-mentioned specific embodiments. According to the basic technical concept of the present invention, the embodiments that can be associated with by ordinary technicians in this field without creative work all belong to the protection scope of the present invention.

Claims

1. An anaerobic fermentation equipment for kitchen waste, characterized in that: The invention comprises a fermentation tank body (1), a heat exchange device (2) and a heat supply device (3), wherein the fermentation tank body (1) is provided with a stirring device (4), and the fermentation tank body (1) is provided with a heating zone (5), a fermentation zone (6) and a discharge zone (7) which are interconnected in sequence, wherein the heating zone (5) is provided with a first hollow interlayer, and a first heat exchange circulation pipe (8) is provided inside the first hollow interlayer; the fermentation zone (6) is provided with a second hollow interlayer, and a second heat exchange circulation pipe (9) is provided inside the second hollow interlayer; the discharge zone (7) is provided with a third hollow interlayer, and a third heat exchange circulation pipe (10) is provided inside the third hollow interlayer; 0); the heat exchange device (2) is provided with a heat supply channel (11), a first heat exchange channel, a second heat exchange channel and a third heat exchange channel inside, both ends of the heat supply channel (11) are connected to the heat supply device (3), the media in the first heat exchange channel, the second heat exchange channel and the third heat exchange channel can exchange heat with the media in the heat supply channel (11), both ends of the first heat exchange channel are respectively connected to both ends of the first heat exchange circulation pipe (8), both ends of the second heat exchange channel are respectively connected to both ends of the second heat exchange circulation pipe (9), and both ends of the third heat exchange channel are respectively connected to both ends of the third heat exchange circulation pipe (10); The heat exchange device (2) comprises a heat exchange shell (12), the interior of the heat exchange shell (12) being hollow to form the heat supply channel (11), the heat supply channel (11) being provided with a first heat exchange tube (13), a second heat exchange tube (14) and a third heat exchange tube (15), the first heat exchange tube (13) being provided with the first heat exchange channel, the first heat exchange tube (13) being located upstream of the heat supply channel (11), the second heat exchange tube (14) being provided with the second heat exchange channel, the third heat exchange tube (15) being provided with the third heat exchange channel, and the second heat exchange tube (14) and the third heat exchange tube (15) being arranged side by side downstream of the heat supply channel (11); The heat exchange shell (12) is provided with a heat supply input interface, a heat supply output interface, a first heat exchange input interface, a first heat exchange output interface, a second heat exchange input interface, a second heat exchange output interface, a third heat exchange input interface and a third heat exchange output interface; the two ends of the heat supply channel (11) are respectively connected to the heat supply input interface and the heat supply output interface; the two ends of the first heat exchange tube (13) are respectively connected to the first heat exchange input interface and the first heat exchange output interface; the two ends of the second heat exchange tube (14) are respectively connected to the second heat exchange input interface and the second heat exchange output interface; and the two ends of the third heat exchange tube (15) are respectively connected to the third heat exchange input interface and the third heat exchange output interface.

2. The anaerobic fermentation equipment for kitchen waste according to claim 1, characterized in that: The first heat exchange tube (13), the second heat exchange tube (14) and the third heat exchange tube (15) are all spiral-shaped; the heating device (3) comprises a hot water supply tank (16), a heater (17) and a temperature controller are provided inside the hot water supply tank (16), a heat supply input pipe (18) and a heat supply output pipe (19) are provided between the hot water supply tank (16) and the heating channel (11), and a driving pump (20) is provided on the heat supply input pipe (18).

3. The anaerobic fermentation equipment for kitchen waste according to claim 1, characterized in that: The stirring device (4) comprises a stirring shaft (21), the stirring shaft (21) being connected to a driving mechanism (22), and a first stirring blade assembly, a second stirring blade assembly and a third stirring blade assembly being arranged on the stirring shaft (21) in sequence, the first stirring blade assembly being located in a heating zone (5), the second stirring blade assembly being located in a fermentation zone (6), and the third stirring blade assembly being located in a discharge zone (7).

4. The anaerobic fermentation equipment for kitchen waste according to claim 3, characterized in that: The stirring shaft (21) is provided with a first flow-pushing mechanism, the first flow-pushing mechanism is arranged between the first stirring blade assembly and the second stirring blade assembly, and the first flow-pushing mechanism is located at the junction of the heating area (5) and the fermentation area (6); the first flow-pushing mechanism comprises a first flow-pushing spiral blade (23), and the first flow-pushing spiral blade (23) is arranged on the stirring shaft (21).

5. The anaerobic fermentation equipment for kitchen waste according to claim 4, characterized in that: The stirring shaft (21) is provided with a second flow-pushing mechanism, the second flow-pushing mechanism is arranged between the second stirring blade assembly and the third stirring blade assembly, and the second flow-pushing mechanism is located at the junction of the fermentation area (6) and the discharge area (7); the second flow-pushing mechanism comprises a second flow-pushing spiral blade (24), and the second flow-pushing spiral blade (24) is arranged on the stirring shaft (21).

6. The anaerobic fermentation equipment for kitchen waste according to claim 5, characterized in that: The first stirring blade assembly comprises a first stirring blade A (25) and a first stirring blade B (26), wherein the first stirring blade A (25) and the first stirring blade B (26) are alternately arranged on the stirring shaft (21), the length of the first stirring blade A (25) is greater than the length of the first stirring blade B (26), and the ends of the first stirring blade A (25) and the first stirring blade B (26) are both provided with a first stirring block, and the surface of the first stirring block is provided with a first grinding tooth.

7. The anaerobic fermentation equipment for kitchen waste according to claim 6, characterized in that: The second stirring blade assembly comprises a plurality of second stirring blades (27), the plurality of second stirring blades (27) are arranged at intervals on the stirring shaft (21), the ends of the plurality of second stirring blades (27) are each provided with a second stirring block, and the surface of the second stirring block is provided with a second grinding tooth; the third stirring blade assembly comprises a plurality of third stirring blades (28), the plurality of third stirring blades (28) are arranged at intervals on the stirring shaft (21), the ends of the plurality of third stirring blades (28) are each provided with a third stirring block, and the surface of the third stirring block is provided with a third grinding tooth.

8. The anaerobic fermentation equipment for kitchen waste according to claim 1, characterized in that: The fermentation tank body (1) comprises an outer tank body (29) and an inner tank body (30); the inner tank body (30) is U-shaped, the inner tank body (30) is arranged on the inner side of the outer tank body (29), and the first hollow interlayer, the second hollow interlayer and the third hollow interlayer are arranged between the inner tank body (30) and the outer tank body (29); a gas outlet (31) is arranged at the top of the fermentation tank body (1), and a material discharge port (32) is arranged at the bottom of the fermentation tank body (1).

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