Cooperative strengthening method and device for kitchen waste medium-temperature anaerobic system

Abstract

The invention relates to the technical field of waste treatment, in particular to a collaborative strengthening method and device for a kitchen waste medium-temperature anaerobic system.The collaborative strengthening device comprises slurry storage equipment, a stirring device and a storage part; the storage part comprises a storage tank and a circulating feeding part arranged in the storage part, and the circulating feeding part comprises a rotating ring arranged at the end of the storage tank, a connecting column arranged at the end of the rotating ring, a rotating cylinder arranged at the end of the connecting column and a spiral feeding piece arranged on the outer wall of the rotating cylinder. When the deoiling slurry and the municipal sludge need to be mixed, the rotary drum is rotated, the rotary drum drives the spiral feeding sheet to rotate, and the spiral feeding sheet drives the mixed liquid to move upwards between the rotary drum and the storage tank to the upper part of the rotary drum and flow into the rotary drum, so that the circulating mixing of the deoiling slurry and the municipal sludge is realized, and the mixing quality is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of garbage treatment, in particular to a synergistic strengthening method and device for a mesophilic anaerobic system of kitchen garbage. BACKGROUND

[0002] The prior art usually processes kitchen materials according to the process route of "impurity removal-coarse separation-fine separation-crushing and pulping-temperature increase and oil extraction-homogenization and temperature reduction-anaerobic fermentation-biogas slurry dreg removal-biogas slurry treatment", wherein the by-products of crude oil and biogas produced by the two process sections of "temperature increase and oil extraction" and "anaerobic fermentation" are important links for the entire treatment system to achieve economic benefits.

[0003] In use, the prior art usually needs to heat the slurry of kitchen garbage to 85-90 DEG C to achieve efficient "oil extraction", and needs to homogenize and cool the material to 36-38 DEG C before entering the anaerobic system to achieve smooth anaerobic fermentation, and the two process sections need to consume a large amount of steam and cooling water respectively.

[0004] And the prior art has a problem that the nutrient composition of the material is not rich and the nutrient composition is not balanced when performing anaerobic fermentation, thereby resulting in low biogas yield and high cost.

[0005] Based on this, the present application designs a synergistic strengthening method and device for a mesophilic anaerobic system of kitchen garbage to solve the above problems. SUMMARY

[0006] In view of the above or the problem of low biogas yield and high cost in the prior art, the present application is proposed.

[0007] Therefore, the purpose of the present application is to provide a synergistic strengthening method and device for a mesophilic anaerobic system of kitchen garbage.

[0008] As a preferred scheme of the synergistic strengthening method for a mesophilic anaerobic system of kitchen garbage of the present application, wherein: comprising the following steps;

[0009] S1: feeding the kitchen garbage into a kitchen material screening machine to screen out coarse impurities and obtain kitchen materials;

[0010] S2: feeding the kitchen materials obtained in S1 into a kitchen material fine screening machine through an axial screw conveyor to separate out fine impurities and obtain remaining kitchen materials;

[0011] S3: feeding the kitchen materials obtained in S2 into a kitchen material pulping machine to make slurry;

[0012] S4: feeding the slurry obtained in S3 into a slurry sand removal machine to separate inorganic sand in the slurry;

[0013] S5: The product obtained in S4 is sent into a steam heater for warming treatment, and is warmed to 85-90°C;

[0014] S6: The product obtained in S5 is sent into a horizontal centrifuge and is separated into oil-containing light material and deoiled slurry;

[0015] S7: The oil-containing light material obtained in S6 is sent into a vertical centrifuge for secondary centrifugal separation into oil and deoiled slurry;

[0016] S8: The oil obtained in S7 is stored;

[0017] S9: The deoiled slurry obtained in S6 and S7 is sent into a slurry storage device;

[0018] S10: The municipal sludge is transported into a sludge material receiver and is sent into a sludge mixing pool for mixing;

[0019] S11: The product obtained in S10 is transported into a slurry pool by a sludge conveying pump and is mixed with the deoiled slurry obtained in S6 and S7 by a stirring device to obtain mixed slurry;

[0020] S12: The mixed slurry obtained in S11 is transported into a shell-and-tube heat exchanger;

[0021] S13: Circulating cooling water is sent into the shell-and-tube heat exchanger by a circulating water cooling system to exchange heat with the mixed slurry, to obtain cooled mixed slurry, and the mixed slurry is cooled to 36-38°C;

[0022] S14: The mixed slurry obtained in S13 is sent into a homogenizing tank for homogenization;

[0023] S15: The product obtained in S14 is transported into an anaerobic reactor by an anaerobic feeding pump for anaerobic fermentation to obtain biogas and post-fermentation material;

[0024] S16: The biogas obtained in S15 is sent into a biogas utilization system;

[0025] S17: The post-fermentation material obtained in S15 is sent into a biogas slurry tank and is sent into a decanter centrifuge by a biogas slurry conveying pump for solid-liquid separation, and the separated solid phase is biogas residue, and the liquid phase is biogas slurry;

[0026] S18: The biogas residue obtained in S17 is sent into a biogas residue incineration system for incineration treatment;

[0027] S19: The biogas slurry is sent into a biogas slurry treatment system for treatment.

[0028] As a preferred scheme of the synergistic reinforcement method for the kitchen waste mesophilic anaerobic system, part of the oil-containing light material in S6 and S7 is sent into a vertical centrifuge for secondary centrifugation, and the other part is mixed with the product obtained in S4 as circulating slurry and sent into a steam heater.

[0029] As a preferred scheme of the synergistic reinforcement method for the kitchen waste mesophilic anaerobic system, part of the oil-containing light material in S6 and S7 is sent into a vertical centrifuge for secondary centrifugation, and the other part is mixed with the product obtained in S4 as circulating slurry and sent into a steam heater.

[0030] The synergistic reinforcement method for the kitchen waste mesophilic anaerobic system has the following beneficial effects: the municipal sludge is used as a "nutrient supplement" and a "bacterial strain additive" in the anaerobic reaction process of the kitchen waste, waste is treated by waste, and the synergistic reinforcement effect is achieved, the stability and economy of the kitchen anaerobic system are increased, and the system operation cost is reduced.

[0031] The sludge adding point is arranged in the slurry pool, the low-temperature or normal-temperature sludge is mixed with the high-temperature slurry to realize mixed cooling, the cooling water supplement amount of the circulating water cooling system is reduced, and water resources are saved.

[0032] Part of the clear liquid produced by the sludge dewatering machine is returned into the sludge mixing pool as flushing water for replacing fresh industrial water, and water resources are saved.

[0033] In view of the problem that the municipal sludge and the deoiled slurry are not easy to mix in the actual use process.

[0034] To solve the above technical problems, the application further provides the following technical scheme: an apparatus comprising a synergistic reinforcement method for a kitchen waste mesophilic anaerobic system, and a kitchen material screening machine.

[0035] The discharge port of the kitchen material screening machine is connected with a shaftless screw conveyor, the discharge port of the shaftless screw conveyor is connected with a kitchen material fine screening machine, the waste residue discharge ports of the kitchen material screening machine and the kitchen material fine screening machine are connected with a incineration treatment device, the discharge port of the kitchen material fine screening machine is connected with a kitchen material pulping machine, the discharge port of the kitchen material pulping machine is connected with a slurry desander, the discharge port of the slurry desander is connected with a steam heater, the discharge port of the steam heater is connected with a horizontal centrifuge, the grease discharge port of the horizontal centrifuge is connected with a vertical centrifuge, the grease discharge port of the horizontal centrifuge is also connected with the feed port of the steam heater, the deoiled grease discharge ports of the vertical centrifuge and the horizontal centrifuge are connected with a slurry storage device, the inside of the slurry storage device is provided with a stirring device, the other feed port of the slurry storage device is connected with a sludge conveying pump, the feed port of the sludge conveying pump is connected with a sludge mixing tank, the feed port of the sludge mixing tank is connected with a sludge material receiver, the discharge port of the slurry storage device is connected with a mixed material conveying pump, the discharge port of the mixed material conveying pump is connected with a tube-shell heat exchanger, the inlet and outlet ports of the tube-shell heat exchanger are connected with a circulating water cooling system, the discharge port of the tube-shell heat exchanger is connected with a slurry homogenizing tank, the discharge port of the slurry homogenizing tank is connected with an anaerobic feeding pump, the discharge port of the anaerobic feeding pump is connected with an anaerobic reactor, the gas outlet port of the anaerobic reactor is connected with a biogas utilization system, the discharge port of the anaerobic reactor is connected with a biogas slurry tank, the discharge port of the biogas slurry tank is connected with a biogas slurry conveying pump, the discharge port of the biogas slurry conveying pump is connected with a stacked screw dewatering machine, the solid phase discharge port of the stacked screw dewatering machine is connected with a biogas residue incineration system, the liquid phase discharge port of the stacked screw dewatering machine is connected with a biogas slurry treatment system, and the liquid phase discharge port of the stacked screw dewatering machine is also connected with the feed port of the sludge mixing tank.

[0036] The slurry storage device comprises a storage member.

[0037] The storage member comprises a storage tank.

[0038] The stirring device comprises a circulating feeding member arranged in the storage member.

[0039] The circulating feeding member comprises a rotating ring arranged at the end of the storage tank, a connecting column arranged at the end of the rotating ring, a rotating drum arranged at the end of the connecting column, and a spiral feeding piece arranged on the outer wall of the rotating drum.

[0040] As a preferred scheme of the device, the storage member further comprises a feed pipe, the end of the storage tank is provided with the feed pipe, and the other end of the storage tank is provided with a discharge pipe.

[0041] As a preferred scheme of the device, the slurry storage device further comprises a dispersing feeding member, and the middle part of the storage tank is provided with the dispersing feeding member.

[0042] As a preferred scheme of the device, the dispersing feeding member comprises a feeding cylinder, the middle part of the storage tank is provided with the feeding cylinder, the inside of the feeding cylinder is provided with an auger, the end of the auger is provided with a diverging sheet, and the end of the storage tank is provided with a motor.

[0043] As a preferred scheme of the device, the stirring device further comprises a stirring member, and the inside of the storage tank is provided with the stirring member.

[0044] As a preferred scheme of the device, the stirring member comprises a first gear, the end of the motor is provided with the first gear, the end of the first gear is provided with a second gear, and the end of the second gear is provided with a stirring rod.

[0045] As a preferred scheme of the device, the circulating feeding member further comprises a third gear, the end of the stirring rod is provided with the third gear, the inner wall of the rotating ring is provided with a toothed ring, and the end of the third gear is arranged on the toothed ring.

[0046] The device has the following beneficial effects: when the deoiled slurry and the municipal sludge need to be mixed, the rotating drum is rotated, the rotating drum drives the spiral feeding piece to rotate, the spiral feeding piece drives the mixed liquid to move upwards between the rotating drum and the storage tank to the upper part of the rotating drum and then to the inside of the rotating drum, the deoiled slurry and the municipal sludge are circularly mixed, and the mixing quality is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0047] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0048] Figure 1 The system diagram of the synergistic reinforcement method for the kitchen waste mesophilic anaerobic system.

[0049] Figure 2 The 3 structure schematic diagram of the synergistic reinforcement method for the kitchen waste mesophilic anaerobic system.

[0050] Figure 3 The 6 structure schematic diagram of the synergistic reinforcement method for the kitchen waste mesophilic anaerobic system.

[0051] Figure 4Figure 21 is a structural schematic diagram of the 21 structure of the synergistic reinforcement method for the kitchen waste mesophilic anaerobic system of the present application.

[0052] Figure 5 Figure 12 is a structural schematic diagram of the 12 structure of the synergistic reinforcement method for the kitchen waste mesophilic anaerobic system of the present application.

[0053] Figure 6 Figure 17 is a structural schematic diagram of the 17 structure of the synergistic reinforcement method for the kitchen waste mesophilic anaerobic system of the present application.

[0054] Figure 7 Figure 1 is a structural schematic diagram of the slurry storage device of the device of the present application.

[0055] Figure 8 Figure 1 is a structural schematic diagram of the slurry storage device of the device of the present application.

[0056] Figure 9 Figure 1 is a structural schematic diagram of the slurry storage device of the device of the present application.

[0057] Figure 10 Figure 1 is a structural schematic diagram of the slurry storage device of the device of the present application.

[0058] The reference numbers in the figures represent: 1, kitchen material screening machine; 2, shaftless screw conveyor; 3, kitchen material fine screening machine; 4, kitchen material pulping machine; 5, slurry sand remover; 6, steam heater; 7, horizontal centrifuge; 8, vertical centrifuge; 9, stirring device; 91, stirring piece; 911, first gear; 912, second gear; 913, stirring rod; 92, circulating feeding piece; 921, third gear; 922, swivel ring; 923, gear ring; 924, connecting column; 925, rotating drum; 926, spiral feeding piece; 10, slurry storage device; 101, storage piece; 1011, storage tank; 1012, feeding pipe; 1013, discharging pipe; 102, dispersing feeding piece; 1021, feeding cylinder; 1022, auger; 1023, diverging sheet; 1024, motor; 11, mixing and conveying pump; 12, tubular heat exchanger; 13, circulating water cooling system; 14, slurry homogenizing tank; 15, anaerobic feeding pump; 16, anaerobic reactor; 17, biogas slurry tank; 18, biogas slurry conveying pump; 19, stacked-screw dewatering machine; 20, sludge conveying pump; 21, sludge mixing pool; 22, sludge material receiver. DETAILED DESCRIPTION

[0059] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0060] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application can be practiced without the specific details set forth in this description. In other instances, well-known methods, procedures, components, and circuits have not been described in detail so as not to unnecessarily obscure aspects of the present application.

[0061] It is also noted that, as used herein, "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the application. The appearances of the phrase "in one embodiment" or "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

[0062] Embodiment 1, Reference Figures 1 to 6 For the first embodiment of the present application, the embodiment provides a synergistic strengthening method for a kitchen waste mesophilic anaerobic system, which can achieve the effect of improving biogas production and saving cost, and comprises the following steps:

[0063] S1: Send the kitchen waste into the kitchen material screening machine, screen out the coarse sundries to obtain the kitchen material;

[0064] S2: Send the kitchen material obtained in S1 into the kitchen material fine screening machine through the shaftless screw conveyor, separate out the fine sundries to obtain the remaining kitchen material;

[0065] S3: Send the kitchen material obtained in S2 into the kitchen material pulping machine to make slurry;

[0066] S4: Send the slurry obtained in S3 into the slurry sand removal machine to separate the inorganic sand in the slurry;

[0067] S5: Send the product obtained in S4 into the steam heater for warming treatment, and warm to 85-90℃;

[0068] S6: Send the product obtained in S5 into the horizontal centrifuge and separate it into the light material containing oil and the deoiled slurry;

[0069] S7: Send the light material containing oil obtained in S6 into the vertical centrifuge for secondary centrifugal separation into oil and deoiled slurry;

[0070] S8: Store the oil obtained in S7;

[0071] S9: Send the deoiled slurry obtained in S6 and S7 into the slurry storage device;

[0072] S10: Transport the municipal sludge to the sludge material receiver and send it into the sludge mixing pool for mixing;

[0073] S11: the product obtained in S10 is delivered into a slurry pool by a slurry delivery pump and mixed with the deoiled slurry obtained in S6 and S7 by a stirring device to obtain mixed slurry;

[0074] S12: the mixed slurry obtained in S11 is delivered into a tubular heat exchanger;

[0075] S13: the circulating cooling water is delivered into the tubular heat exchanger by a circulating water cooling system to exchange heat with the mixed slurry to obtain cooled mixed slurry, and the mixed slurry is cooled to 36-38℃;

[0076] S14: the mixed slurry obtained in S13 is delivered into a homogenizing tank to homogenize;

[0077] S15: the product obtained in S14 is delivered into an anaerobic reactor by an anaerobic feeding pump to carry out anaerobic fermentation to obtain biogas and fermented material;

[0078] S16: the biogas obtained in S15 is delivered into a biogas utilization system;

[0079] S17: the fermented material obtained in S15 is delivered into a biogas slurry tank and delivered into a decanter centrifuge by a biogas slurry delivery pump to carry out solid-liquid separation, the separated solid phase is biogas residue, and the liquid phase is biogas slurry;

[0080] S18: the biogas residue obtained in S17 is delivered into a biogas residue incineration system for incineration treatment;

[0081] S19: the biogas slurry is delivered into a biogas slurry treatment system for treatment.

[0082] Part of the oil-containing light material in S6 and S7 is delivered into a vertical centrifuge for secondary centrifugation, and the other part is mixed with the product obtained in S4 as circulating slurry and delivered into a steam heater.

[0083] Part of the biogas slurry in S19 is returned to the sludge mixing pool to mix with municipal sludge.

[0084] Further, the kitchen material is transported to a kitchen material screening machine 1 to screen out coarse impurities, the screened kitchen material is transported to a kitchen material fine screening machine 3 by an axial screw conveyor 2 to finely separate fine impurities, and the finely separated kitchen material enters a kitchen material pulping machine 4 to make the kitchen material into slurry.

[0085] The kitchen slurry enters the slurry desander 5 to separate the large proportion of inorganic sand in it, and then enters the steam heater 6 with the oil extraction circulating slurry to heat the slurry. The heated slurry enters the horizontal centrifuge 7, and the light material containing oil enters the vertical centrifuge 8 for secondary centrifugal separation, and the separated oil enters the grease storage and transportation system. The part of the slurry containing oil separated by the vertical centrifuge 8 enters the steam heater 6 as circulating slurry mixed with fresh slurry from the slurry desander 5, and the deoiled slurry enters the slurry pool 10 together with the deoiled slurry from the horizontal centrifuge 7.

[0086] The municipal sludge is transported to the sludge material receiver 22, and then enters the sludge mixing pool 21 to be mixed with part of the biogas slurry produced by the screw press dewaterer 19, and is transported to the slurry pool 10 by the sludge conveying pump 20. The agitator 9 is arranged in the slurry pool 10, and the deoiled slurry and the sludge are fully mixed into mixed slurry under the action of the agitator, and then are transported to the tube-shell heat exchanger 12 by the mixed material conveying pump 11. The mixed slurry and the circulating cooling water exchange heat in the tube-shell heat exchanger 12, and the circulating cooling water is cooled by the circulating water cooling system 13. The amount of water evaporated by the circulating water cooling system 13 is supplemented by the cooling water source to ensure the water amount in the entire cooling system.

[0087] The cooled mixed slurry enters the homogenizing tank 14 for homogenization, and then is transported to the anaerobic reactor 16 by the anaerobic feeding pump 15 for anaerobic fermentation. The biogas produced by the fermentation enters the biogas utilization system, and the fermented material is discharged to the biogas slurry tank 17. The part of the biogas slurry contains a large amount of biogas residue, which is transported to the screw press dewaterer 19 by the biogas slurry pump 18 for solid-liquid separation. The separated solid phase is the biogas residue, which is sent to the biogas residue incineration system for treatment. The liquid phase is the biogas slurry, part of which is returned to the sludge mixing pool 21 to be mixed with the municipal sludge, and the other part enters the biogas slurry treatment system for treatment.

[0088] In use, the municipal sludge and the anaerobic biogas slurry are mixed in the sludge mixing pool 21, and the mixture with a solid content of 4% enters the slurry storage device 10 to be mixed with the deoiled slurry. In this process, the temperature of the mixture of the municipal sludge and the biogas slurry is usually 25-30°C, and the kitchen slurry is heated to 85-90°C in the deoiling process. The heat of the mixture is neutralized in the mixing process, and the overall temperature is reduced to below 70°C. The operating load of the tube-shell heat exchanger 12 is significantly reduced, and the evaporation consumption of the circulating cooling water is reduced.

[0089] Municipal sludge is a mixture of microbial colonies, which has significant particle size and biosorption performance. In the mixing process with the deoiled slurry, it will adsorb and wrap the residual oil, so that the oil and biological phase will be combined before entering the anaerobic reactor 16, which will accelerate the digestion process of the oil in the anaerobic reactor 16. The oil adsorbed by the biological phase will be better contacted with the anaerobic bacteria and assimilated, compared with the free oil which will always float on the surface of the anaerobic reactor and is difficult to be effectively contacted with the anaerobic bacteria and assimilated. This process not only increases the biogas production, but also reduces the residual oil content in the biogas slurry and residue.

[0090] Because the residual oil in the biogas slurry and residue seriously affects the flocculation reaction of the flocculating agent and the suspended matter in the residue, higher residual oil will increase the difficulty of separating the residue and the biogas slurry in the stacked screw dewatering machine 19. Therefore, reducing the residual content in the biogas slurry and residue will reduce the difficulty of separating the residue and the biogas slurry in the stacked screw dewatering machine 19, and reduce the amount of flocculating agent used.

[0091] During the anaerobic fermentation process of kitchen materials, alkalinity is needed to neutralize organic acid to maintain stable pH. When alkalinity is lacking, anaerobic acidification phenomenon will occur, which seriously endangers the operation of the system. Municipal sludge contains a large amount of alkaline substances. By adding municipal sludge, the alkalinity of the anaerobic reactor 16 can be supplemented, which is beneficial to the stability of the alkalinity balance of the anaerobic system and alleviates the inhibition of the organic acid produced in the anaerobic acidification section on the methanogenic bacteria.

[0092] Municipal sludge itself contains high organic matter and minerals. The organic matter composition of municipal sludge is quite different from that of kitchen materials. The input of municipal sludge makes the organic matter composition in the anaerobic system more abundant, and also provides rich mineral nutrient composition for the anaerobic system. The rich comprehensive nutrient composition is beneficial to improve the richness of anaerobic bacteria and the stability of the entire anaerobic ecological system.

[0093] Municipal sludge is the excess microorganisms proliferated in the sewage treatment process. When it enters the anaerobic system, the facultative bacteria in it are converted into anaerobic bacteria, which is equivalent to providing bacteria for the anaerobic reactor 16, so that the anaerobic system maintains a high amount of anaerobic microorganisms, which can make the anaerobic system achieve a high volume load and improve the treatment capacity and biogas production of the entire system.

[0094] Example 2, refer to Figures 7 to 10 The second embodiment of the present application is different from the previous embodiment in that it provides a device that can achieve the effect of fully and uniformly mixing municipal sludge and deoiled slurry, which includes a kitchen material screening machine 1;

[0095] The discharge outlet of the kitchen material screening machine 1 is connected with a shaftless screw conveyor 2, the discharge outlet of the shaftless screw conveyor 2 is connected with a kitchen material fine screening machine 3, the waste residue discharge outlets of the kitchen material screening machine 1 and the kitchen material fine screening machine 3 are connected with a incineration treatment device, the discharge outlet of the kitchen material fine screening machine 3 is connected with a kitchen material pulping machine 4, the discharge outlet of the kitchen material pulping machine 4 is connected with a slurry desander 5, the discharge outlet of the slurry desander 5 is connected with a steam heater 6, the discharge outlet of the steam heater 6 is connected with a horizontal centrifuge 7, the grease discharge outlet of the horizontal centrifuge 7 is connected with a vertical centrifuge 8, the grease discharge outlet of the horizontal centrifuge 7 also communicates with the feed inlet of the steam heater 6, the deoiled grease discharge outlets of the vertical centrifuge 8 and the horizontal centrifuge 7 are connected with a slurry storage device 10, the inside of the slurry storage device 10 is provided with a stirring device 9, the other feed inlet of the slurry storage device 10 is connected with a sludge conveying pump 20, the feed inlet of the sludge conveying pump 20 is connected with a sludge mixing tank 21, the feed inlet of the sludge mixing tank 21 is connected with a sludge material receiver 22, the discharge outlet of the slurry storage device 10 is connected with a mixed material conveying pump 11, the discharge outlet of the mixed material conveying pump 11 is connected with a tubular heat exchanger 12, the inlet and outlet water inlets of the tubular heat exchanger 12 are connected with a circulating water cooling system 13, the discharge outlet of the tubular heat exchanger 12 is connected with a slurry homogenizing tank 14, the discharge outlet of the slurry homogenizing tank 14 is connected with an anaerobic feed pump 15, the discharge outlet of the anaerobic feed pump 15 is connected with an anaerobic reactor 16, the gas outlet of the anaerobic reactor 16 is connected with a biogas utilization system, the discharge outlet of the anaerobic reactor 16 is connected with a biogas slurry tank 17, the discharge outlet of the biogas slurry tank 17 is connected with a biogas slurry conveying pump 18, the discharge outlet of the biogas slurry conveying pump 18 is connected with a stacked screw dewatering machine 19, the solid phase discharge outlet of the stacked screw dewatering machine 19 is connected with a biogas residue incineration system, the liquid phase discharge outlet of the stacked screw dewatering machine 19 is connected with a biogas slurry treatment system, and the liquid phase discharge outlet of the stacked screw dewatering machine 19 is also connected with the feed inlet of the sludge mixing tank 21.

[0096] Specifically, the slurry storage device 10 comprises a storage member 101.

[0097] The storage member 101 comprises a storage tank 1011.

[0098] Further, the slurry storage device 10 comprises a storage member 101.

[0099] The storage member 101 comprises a storage tank 1011, the deoiled slurry discharge outlets of the horizontal centrifuge 7 and the vertical centrifuge 8 communicate with the storage tank 1011, the discharge outlet of the sludge conveying pump 20 communicates with the storage tank 1011, and the feed inlet of the mixed material conveying pump 11 communicates with the storage tank 1011.

[0100] Specifically, the stirring device 9 comprises a circulating feeding member 92 arranged in the storage member 101.

[0101] Further, the stirring device 9 comprises a circulating feeding part 92, and the circulating feeding part 92 is connected to the inside of the slurry storage device 10;

[0102] Specifically, the circulating feeding part 92 comprises a rotating ring 922 arranged at the end of the storage tank 1011, a connecting column 924 arranged at the end of the rotating ring 922, a rotating drum 925 arranged at the end of the connecting column 924, and a spiral feeding piece 926 arranged on the outer wall of the rotating drum 925;

[0103] Further, the circulating feeding part 92 comprises the rotating ring 922, the top plate of the storage tank 1011 is rotationally connected with the rotating ring 922, the bottom of the rotating ring 922 is fixedly connected with a plurality of groups of connecting columns 924, the lower end of the connecting column 924 is fixedly connected with the rotating drum 925, the side wall of the rotating drum 925 close to the inner wall of the storage tank 1011 is fixedly connected with the spiral feeding piece 926, and the end of the spiral feeding piece 926 away from the rotating drum 925 is slidingly connected with the inner wall of the storage tank 1011;

[0104] Specifically, the storage part 101 further comprises a feeding pipe 1012, and the end of the storage tank 1011 is provided with the feeding pipe 1012, and the other end of the storage tank 1011 is provided with a discharging pipe 1013;

[0105] Further, the storage part 101 further comprises the feeding pipe 1012, the upper end of the storage tank 1011 is fixedly connected with the feeding pipe 1012, the feeding pipe 1012 is in communication with the deoiled slurry discharge port of the horizontal centrifuge 7 and the vertical centrifuge 8, and the lower end of the storage tank 1011 is fixedly connected with the discharging pipe 1013, and the discharging pipe 1013 is in communication with the feeding port of the mixing conveying pump 11;

[0106] Specifically, the slurry storage device 10 further comprises a dispersing feeding part 102, and the middle part of the storage tank 1011 is provided with the dispersing feeding part 102;

[0107] Further, the slurry storage device 10 further comprises the dispersing feeding part 102, and the middle part of the storage tank 1011 is connected with the dispersing feeding part 102;

[0108] Specifically, the dispersing feeding part 102 comprises a feeding cylinder 1021, the middle part of the storage tank 1011 is provided with the feeding cylinder 1021, the inside of the feeding cylinder 1021 is provided with an auger 1022, the end of the auger 1022 is provided with a diverging piece 1023, and the end of the storage tank 1011 is provided with a motor 1024;

[0109] Further, the dispersion feeding piece 102 comprises a feeding cylinder 1021, the feeding cylinder 1021 is fixedly connected to the middle part of the top plate of the storage tank 1011, the feeding cylinder 1021 penetrates through the top plate of the storage tank 1011, the inside of the feeding cylinder 1021 is rotationally connected with an auger 1022 through a support frame, a plurality of groups of diverging sheets 1023 are fixedly connected to the lower end side wall of the rotating shaft of the auger 1022, the diverging sheets 1023 are located below the feeding cylinder 1021, a motor 1024 is fixedly connected to the bottom of the storage tank 1011, the output end of the motor 1024 penetrates through the bottom plate of the storage tank 1011 and is fixedly connected with the rotating shaft of the auger 1022;

[0110] The upper end inlet of the feeding cylinder 1021 is in communication with the feeding port of the mud conveying pump 20;

[0111] Specifically, the stirring device 9 further comprises a stirring piece 91, and the inside of the storage tank 1011 is provided with the stirring piece 91;

[0112] Further, the stirring device 9 further comprises a stirring piece 91, and the inside of the storage tank 1011 is connected with the stirring piece 91;

[0113] Specifically, the stirring piece 91 comprises a first gear 911, the end of the motor 1024 is provided with the first gear 911, the end of the first gear 911 is provided with a second gear 912, and the end of the second gear 912 is provided with a stirring rod 913;

[0114] Further, the stirring piece 91 comprises a first gear 911, the output end of the motor 1024 is fixedly connected with the first gear 911, a plurality of groups of second gears 912 are meshingly connected to the outer end of the first gear 911, the middle part of the second gear 912 is fixedly connected with the stirring rod 913, the rotating shaft of the stirring rod 913 penetrates through the bottom plate of the storage tank 1011 and the second gear 912 and is rotationally connected with the storage tank 1011, and the rotating shaft of the stirring rod 913 is rotationally connected to the inner top of the storage tank 1011;

[0115] Specifically, the circulating feeding piece 92 further comprises a third gear 921, the end of the stirring rod 913 is provided with the third gear 921, a tooth ring 923 is arranged on the inner wall of the rotating ring 922, and the end of the third gear 921 is arranged on the tooth ring 923;

[0116] Further, the circulating feeding piece 92 further comprises a third gear 921, the upper end of the stirring rod 913 is fixedly connected with the third gear 921, and a tooth ring 923 is fixedly connected to the inner wall of the rotating ring 922, the third gear 921 is meshingly connected with the tooth ring 923;

[0117] In use, the dewatered slurry is filled into the storage tank 1011 through the feeding pipe 1012, and when the dewatered slurry is delivered, the municipal sludge is delivered into the feeding cylinder 1021 through the upper end inlet of the feeding cylinder 1021, at this time, the motor 1024 is started, the motor 1024 drives the diverging sheet 1023 and the auger 1022 to rotate, the auger 1022 drives the municipal sludge to move downward to the diverging sheet 1023, at this time, the municipal sludge is dispersed and thrown into the storage tank 1011 through the diverging sheet 1023, so that the dispersed feeding of the municipal sludge is realized, and the mixing of the municipal sludge and the dewatered slurry is more sufficient.

[0118] The motor 1024 drives the first gear 911 to rotate at the same time, the first gear 911 drives the second gear 912 to rotate, the second gear 912 drives the stirring rod 913 to rotate, the stirring rod 913 stirs and mixes the materials in the inside of the rotating drum 925, the second gear 912 drives the third gear 921 to rotate at the same time, the third gear 921 drives the rotating ring 922 to rotate through the gear ring 923, the rotating ring 922 drives the rotating drum 925 to rotate through the connecting column 924, the rotating drum 925 drives the spiral feeding piece 926 to rotate, at this time, the spiral feeding piece 926 drives the materials at the lower end of the storage tank 1011 to move upward to the upper side of the rotating drum 925, the materials are splashed from the upper side of the rotating drum 925 to the inside of the stirring rod 913 in the rotating drum 925 by the spiral feeding piece 926 and are further mixed by the stirring rod 913, so that the circulating mixing of the materials in the inside of the storage tank 1011 is realized, and the materials in the inside of the storage tank 1011 can be more fully mixed.

[0119] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, not to limit the present application, although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present application, which should be covered in the scope of the claims of the present application.

Claims

1. A synergistic enhancement method for a mesophilic anaerobic system for food waste, characterized in that: Includes the following steps; S1: Feed the kitchen waste into the kitchen material screening machine to screen out the large impurities and obtain kitchen materials; S2: The kitchen materials obtained in S1 are conveyed to the kitchen material separator through a shaftless screw conveyor to separate out the fine impurities and obtain the remaining kitchen materials. S3: The kitchen materials obtained in S2 are fed into a kitchen material pulping machine to make a pulp; S4: The slurry obtained in S3 is sent into the slurry desanding machine to separate the inorganic sand in the slurry; S5: The product obtained in S4 is sent into a steam heater for heating treatment to 85℃-90℃. S6: The product obtained in S5 is fed into a horizontal centrifuge and separated into light materials containing oil and deoiled slurry. S7: The light material containing oil obtained in S6 is fed into a vertical centrifuge for secondary centrifugation to separate oil and deoiled slurry. S8: Store the grease obtained in S7; S9: The deoiled slurry obtained from S6 and S7 is fed into the slurry storage device; S10: Transport municipal sludge to the sludge material receiver and send it into the sludge mixing tank for mixing; S11: The product obtained in S10 is transported to the slurry tank by a mud conveying pump and mixed with the deoiled slurry obtained in S6 and S7 by a stirring device to obtain a mixed slurry; S12: The mixed slurry obtained in S11 is transported into a shell-and-tube heat exchanger; S13: Circulating cooling water is sent into a shell-and-tube heat exchanger through a circulating water cooling system to exchange heat with the mixed slurry, resulting in a cooled mixed slurry that is cooled to 36℃-38℃. S14: The mixed slurry obtained in S13 is sent into a homogenizing tank for homogenization and equalization. S15: The product obtained in S14 is transported to the anaerobic reactor through an anaerobic feed pump for anaerobic fermentation to obtain biogas and fermented materials. S16: Send the biogas obtained in S15 into the biogas utilization system; S17: The fermented material obtained in S15 is sent into the biogas slurry tank and then sent to the screw press dewatering machine through the biogas slurry transfer pump for solid-liquid separation. The separated solid phase is biogas residue and the liquid phase is biogas slurry. S18: The biogas residue obtained in S17 is sent to the biogas residue incineration system for incineration treatment. S19: Send the biogas slurry into the biogas slurry treatment system for processing.

2. The synergistic enhancement method for a mesophilic anaerobic system for food waste according to claim 1, characterized in that: In S6 and S7, a portion of the oil-containing light material is fed into a vertical centrifuge for secondary centrifugation, while the other portion is mixed with the product obtained in S4 as circulating slurry and fed into a steam heater.

3. The synergistic enhancement method for a mesophilic anaerobic system for food waste according to claim 1, characterized in that: A portion of the biogas slurry in S19 is diverted back to the sludge mixing tank for mixing and blending with municipal sludge.

4. An apparatus, characterized in that, The method for synergistic enhancement of a mesophilic anaerobic system for kitchen waste as described in any one of claims 1 to 3, and a kitchen waste material screening machine (1). The discharge port of the kitchen waste screening machine (1) is connected to a shaftless screw conveyor (2), the discharge port of the shaftless screw conveyor (2) is connected to a kitchen waste refining machine (3), the waste discharge ports of the kitchen waste screening machine (1) and the kitchen waste refining machine (3) are connected to an incineration treatment device, the discharge port of the kitchen waste refining machine (3) is connected to a kitchen waste pulping machine (4), the discharge port of the kitchen waste pulping machine (4) is connected to a slurry desander (5), the discharge port of the slurry desander (5) is connected to a steam heater (6), and the discharge port of the steam heater (6) is connected to... A horizontal centrifuge (7) is provided, and the oil outlet of the horizontal centrifuge (7) is connected to a vertical centrifuge (8). The oil outlet of the horizontal centrifuge (7) is also connected to the inlet of a steam heater (6). The de-oiled oil outlets of the vertical centrifuge (8) and the horizontal centrifuge (7) are connected to a slurry storage device (10). The slurry storage device (10) is equipped with a stirring device (9). Another inlet of the slurry storage device (10) is connected to a sludge conveying pump (20). The inlet of the sludge conveying pump (20) is connected to a sludge mixing tank (21). The sludge mixing tank (21) is connected to a sludge material receiver (22) at its inlet. The slurry storage device (10) is connected to a mixing and conveying pump (11) at its outlet. The mixing and conveying pump (11) is connected to a shell-and-tube heat exchanger (12) at its outlet. The shell-and-tube heat exchanger (12) is connected to a circulating water cooling system (13) at its inlet and outlet. The shell-and-tube heat exchanger (12) is connected to a slurry homogenizing tank (14) at its outlet. The slurry homogenizing tank (14) is connected to an anaerobic feed pump (15) at its outlet. The anaerobic feed pump (15) is connected to an anaerobic reactor at its outlet. (16) The gas outlet of the anaerobic reactor (16) is connected to a biogas utilization system. The discharge outlet of the anaerobic reactor (16) is connected to a biogas slurry tank (17). The discharge outlet of the biogas slurry tank (17) is connected to a biogas slurry transfer pump (18). The discharge outlet of the biogas slurry transfer pump (18) is connected to a screw press dewatering machine (19). The solid phase discharge outlet of the screw press dewatering machine (19) is connected to a biogas residue incineration system. The liquid phase discharge outlet of the screw press dewatering machine (19) is connected to a biogas slurry treatment system. The liquid phase discharge outlet of the screw press dewatering machine (19) is also connected to the inlet of the sludge mixing tank (21). The slurry storage device (10) includes a storage component (101); wherein, The storage unit (101) includes a storage tank (1011); and, The stirring device (9) includes a circulating feeder (92) disposed within the storage unit (101); wherein, The circulating feeder (92) includes a rotating ring (922) disposed at the end of the storage tank (1011), a connecting post (924) disposed at the end of the rotating ring (922), a rotating cylinder (925) disposed at the end of the connecting post (924), and a spiral feeder (926) disposed on the outer wall of the rotating cylinder (925).

5. The apparatus according to claim 4, characterized in that: The storage device (101) also includes a feed pipe (1012), the end of the storage tank (1011) is provided with a feed pipe (1012), and the other end of the storage tank (1011) is provided with a discharge pipe (1013).

6. The apparatus according to claim 5, characterized in that: The slurry storage device (10) further includes a dispersing feeder (102), and the dispersing feeder (102) is provided in the middle of the storage tank (1011).

7. The apparatus according to claim 6, characterized in that: The dispersing feeder (102) includes a feed cylinder (1021), the feed cylinder (1021) is provided in the middle of the storage tank (1011), the feed cylinder (1022) is provided inside the feed cylinder (1021), the end of the auger (1022) is provided with a dispersing plate (1023), and the end of the storage tank (1011) is provided with a motor (1024).

8. The apparatus according to claim 7, characterized in that: The stirring device (9) also includes a stirring element (91), and the stirring element (91) is provided inside the storage tank (1011).

9. The apparatus according to claim 8, characterized in that: The stirring component (91) includes a first gear (911), the end of the motor (1024) is provided with the first gear (911), the end of the first gear (911) is provided with a second gear (912), and the end of the second gear (912) is provided with a stirring rod (913).

10. The apparatus according to claim 9, characterized in that: The circulating feeder (92) also includes a third gear (921), the end of the stirring rod (913) is provided with a third gear (921), the inner wall of the rotating ring (922) is provided with a toothed ring (923), and the end of the third gear (921) is provided on the toothed ring (923).

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