Sludge synergy anaerobic fermentation gas production system

Abstract

The invention provides a sludge synergy anaerobic fermentation gas production system, the sludge synergy anaerobic fermentation gas production system comprises a tank body, a heating assembly, a stirring assembly and a gas recovery assembly, the tank body is provided with a sludge inlet and a sludge discharge port, the sludge inlet is located at the top of the tank body, the sludge discharge port is located at the bottom of the tank body, the heating assembly comprises a heating part, and the stirring assembly is located at the bottom of the tank body. The heating component is arranged in the side wall of the tank body and used for heating sludge in the tank body, the stirring assembly comprises a driving part and a stirring part, the driving part is arranged in the tank body, the stirring part is connected with the driving part and located in the tank body, the driving part is used for driving the stirring part to stir the sludge in the tank body, and the gas recycling assembly comprises a recycling inlet. The recycling inlet is connected with the tank body, and the gas recycling assembly is used for collecting gas generated by the tank body. The sludge synergistic anaerobic fermentation gas production system has the advantages of being small in occupied area, small in pollution, low in energy consumption and the like, meanwhile, organic matter in the sludge can be effectively recycled, and sustainable utilization of resources is achieved.

Description

Technical Field

[0001] This invention belongs to the field of environmental protection and new energy technology, specifically, it relates to a sludge co-anaerobic fermentation gas production system. Background Technology

[0002] Sludge is a solid waste generated during wastewater treatment, containing a large amount of organic matter. If not properly treated, it will cause serious secondary pollution to the environment. Related technologies for sludge treatment mainly include landfill, composting, and incineration, but these methods have problems such as large land area requirements, soil and groundwater pollution, and high energy consumption. Summary of the Invention

[0003] The present invention aims to at least partially solve one of the technical problems in the related art.

[0004] Therefore, embodiments of the present invention propose a sludge co-anaerobic fermentation gas production system, which has the advantages of small footprint, low pollution, and low energy consumption, and can also effectively recover and utilize organic matter in sludge, thus achieving sustainable resource utilization.

[0005] The sludge co-anaerobic fermentation gas generation system of this invention includes: The tank has a sludge inlet and a sludge outlet, the sludge inlet being located at the top of the tank and the sludge outlet being located at the bottom of the tank, the sludge inlet being used to introduce sludge; A heating assembly, comprising a heating element disposed inside the side wall of the tank, the heating element being used to heat the sludge inside the tank; A mixing assembly, comprising a driving component and a mixing component, wherein the driving component is disposed in the tank body, and the mixing component is connected to the driving component and located inside the tank body, and the driving component is used to drive the mixing component to stir the sludge in the tank body. A gas recovery assembly, comprising a recovery inlet connected to the tank, wherein the gas recovery assembly is used to collect the gas generated by the tank.

[0006] In this embodiment of the sludge co-anaerobic fermentation gas production system, the main shaft of the stirring device drives multiple annular supports to rotate. Scrapers on these supports move along the inner wall of the tank, effectively scraping away sludge adhering to it. Through-holes on the scraper surface enhance sludge fluidity, preventing sludge deposition and ensuring the stability of the fermentation process. The heat transfer medium within the heat transfer medium channel is distributed in a spiral pattern, uniformly transferring heat and maintaining a constant temperature within the tank, which is beneficial for the anaerobic fermentation process. The filtration and condensation units purify and condense the gas generated during fermentation, reducing impurities and improving gas quality.

[0007] In some embodiments, the heating assembly includes a power supply component connected to the heating assembly, the power supply component being used to provide a heat source or electrical energy to the heating assembly.

[0008] In some embodiments, the heating element is a tubular structure, and the power supply element is used to introduce a heating medium into the heating element, the temperature of which is higher than the temperature of the sludge inside the tank.

[0009] In some embodiments, the heating element is a resistance wire, and the power supply element is used to provide the heating element with the required heating power.

[0010] In some embodiments, the side wall of the tank is provided with a heating gap, the heating component is disposed in the heating gap, and the heating gap is used to fill the insulation material.

[0011] In some embodiments, the stirring component includes a stirring spindle and stirring scrapers. The stirring spindle is connected to the driving component, and the stirring scrapers are connected to the stirring spindle. There are multiple stirring scrapers, and the multiple stirring scrapers are arranged at circumferential intervals along the stirring spindle.

[0012] In some embodiments, the first end of the stirring scraper is connected to the stirring spindle, the second end of the stirring scraper extends toward the inner wall of the tank, and the stirring scraper has a plurality of through holes.

[0013] In some embodiments, the gas recovery assembly includes a filter component and a condenser component connected in sequence. The recovery inlet is located in the filter component. The condenser component includes a condenser body and an activated carbon layer and a molecular sieve layer arranged in sequence along the direction of gas flow. The activated carbon layer and the molecular sieve layer are located within the condenser body. The condenser body has an exhaust port and a liquid drain port. The exhaust port is used to connect to a gas recovery device, and the liquid drain port is used to connect to a liquid recovery device.

[0014] In some embodiments, the condensing component further includes a cooling coil arranged circumferentially around the condensing body.

[0015] In some embodiments, the sludge co-anaerobic fermentation gas production system of the present invention further includes a control component, the control component including a detection element and a control element, at least a portion of the detection element being disposed in the tank body for detecting temperature changes in the tank body, at least a portion of the control element being disposed in the tank body for adjusting the temperature in the tank body, and the detection element being electrically connected to the control element. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the overall structure of the sludge co-anaerobic fermentation gas production system according to an embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram of the tank structure of the sludge co-anaerobic fermentation gas generation system according to an embodiment of the present invention.

[0018] Figure 3 This is a schematic diagram from another perspective of the sludge co-anaerobic fermentation gas production system according to an embodiment of the present invention.

[0019] Figure label: 1. Tank body; 11. Sludge inlet; 12. Sludge outlet; 13. Heating gap; 21. Heating components; 31. Drive component; 32. Agitator component; 321. Agitator shaft; 322. Agitator scraper; 323. Annular support; 41. Filter component; 42. Condensation component; 51. Inspection component; 52. Controller; 6. Collection tank. Detailed Implementation

[0020] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0021] like Figures 1-3 As shown, the sludge co-anaerobic fermentation gas generation system of this invention includes: tank 1, heating component, stirring component and gas recovery component.

[0022] Tank 1 has a sludge inlet 11 and a sludge outlet 12. The sludge inlet 11 is located at the top of tank 1, and the sludge outlet 12 is located at the bottom of tank 1. The sludge inlet 11 is used to introduce sludge. The heating assembly includes a heating element 21, which is located inside the side wall of tank 1. The heating element 21 is used to heat the sludge inside tank 1. The stirring assembly includes a drive element 31 and a stirring element 32. The drive element 31 is located in tank 1, and the stirring element 32 is connected to the drive element 31 and located inside tank 1. The drive element 31 is used to drive the stirring element 32 to stir the sludge inside tank 1. The gas recovery assembly includes a recovery inlet, which is connected to tank 1. The gas recovery assembly is used to collect the gas generated by tank 1.

[0023] Specifically, such as Figures 1-3As shown, the tank 1 has a sludge inlet 11 at the top and a sludge outlet 12 at the bottom. A collection trough 6 is located below the sludge outlet 12 to collect the sludge discharged from the outlet 12. A heating element 21 is embedded inside the side wall of the tank 1, and the area covered by the heating element 21 is adapted to the dimensions of the side wall of the tank 1 so that the heat radiation from the heating element 21 can cover the entire interior area of ​​the tank 1. The heating element 21 can be connected to an external heat source to heat the sludge inside the tank 1 and maintain the constant temperature required for the fermentation process.

[0024] The mixing assembly includes a drive component 31 and a stirring component 32. The drive component 31 (such as a drive motor) is located at the top of the tank 1, and the stirring component 32 (such as a scraper) is located inside the tank 1. The mixing assembly drives the stirring component 32 to stir the sludge inside the tank 1 via the drive component 31.

[0025] The gas recovery inlet of the gas recovery assembly is connected to the top of tank 1 to collect the gas produced during fermentation. The gas recovery assembly is equipped with gas processing devices (such as filtration devices, cooling devices, etc.) to purify and condense the gas.

[0026] Optionally, such as Figures 1-3 As shown, a sludge collection trough can be arranged below the sludge discharge port 12, and an electrically controlled valve is installed at the sludge discharge port 12 to control its opening and closing. That is, after the sludge in the tank 1 completes the fermentation process, the electrically controlled valve opens the sludge discharge port 12, allowing the fermented sludge in the tank 1 to be discharged from the tank 1 into the sludge collection trough. During the sludge discharge process, the stirring component continues to rotate inside the tank 1 to ensure that the residue on the inner wall and bottom of the tank 1 is thoroughly removed, preventing residue from affecting the next round of fermentation. Furthermore, the electrically controlled valve at the sludge discharge port can be precisely controlled by a controller 52, and the opening or closing time can be flexibly adjusted according to actual needs, thereby achieving automated operation.

[0027] In other words, in the sludge co-anaerobic fermentation gas production system of this embodiment, the main shaft of the stirring device drives multiple annular supports 323 to rotate. Scrapers on the annular supports 323 move along the inner wall of the tank 1, effectively scraping away the sludge adhering to the inner wall. The through-holes on the scraper surface enhance sludge fluidity, prevent sludge deposition, and ensure the stability of the fermentation process. The heat transfer medium in the heat transfer medium channel is distributed in a spiral pattern, uniformly transferring heat and maintaining a constant temperature inside the tank 1, which is beneficial for the anaerobic fermentation process. The filtration unit and condensation unit purify and condense the gas generated during fermentation, reducing the impurity content in the gas and improving gas quality.

[0028] In some embodiments, the heating assembly includes a power supply component connected to the heating assembly 21, which is used to provide a heat source or electrical energy to the heating assembly 21.

[0029] Understandably, the power supply component is connected to the heating component 21, and its main function is to provide heat or electrical energy to the heating component 21. The power supply component can be an electric heater, steam pipe, hot oil circulation system, etc., depending on the system design and the required heating method. The heating component 21 is located inside the side wall of the tank 1 and is connected to the power supply component, receiving energy from the power supply component to heat the sludge inside the tank 1.

[0030] Optionally, the power supply component and the heating component 21 are connected by pipes, wires or other connection methods to ensure that energy can be effectively transferred to the heating component 21.

[0031] In other words, through the design of the power supply components, the system can flexibly select different heat sources, such as electricity, steam, and hot oil, to adapt to different operating conditions and sludge treatment needs. The power supply components can efficiently transfer heat or electricity to the heating element 21, ensuring that the sludge in tank 1 can quickly reach and maintain a suitable fermentation temperature, promoting the efficiency of anaerobic fermentation. The design of the power supply components can consider energy recovery and reuse, such as utilizing the waste heat generated during fermentation, reducing energy consumption, lowering operating costs, and minimizing environmental impact.

[0032] Optionally, the heating element 21 has a tubular structure, and the power supply element is used to introduce a heating medium into the heating element 21. The temperature of the heating medium is higher than the temperature of the sludge in the tank 1.

[0033] Understandably, the heating element 21 is composed of tubular structures, which are placed or embedded inside the side wall of the fermentation tank 1, or surround the outside of the tank 1. The design of the heating element 21 ensures that the heating medium can effectively exchange heat with the sludge.

[0034] The power supply component is connected to the heating component 21, and its main function is to provide a heating medium to the heating component 21. The heating medium can be hot water, hot oil, steam, etc., depending on the system design and operating conditions. The heating medium starts from the power supply component, enters the heating component 21 through a pipeline, releases heat in it to heat the sludge, and is then recycled after cooling or reheating.

[0035] The tubular heating element 21 can be a spiral coil or an annular tube, and there are multiple annular tubes arranged at intervals along the height direction of the tank 1, so as to cover all areas of the tank 1.

[0036] In other words, the tubular heating element 21 provides a large contact area, which facilitates heat exchange between the heating medium and the sludge, thereby achieving efficient heat transfer. Since the temperature of the heating medium can be independently controlled, the temperature inside the fermentation tank 1 can be precisely controlled, providing optimal conditions for anaerobic fermentation. The heating medium can be recycled after heating the sludge, and can be reheated by the power supply components, improving energy utilization efficiency and reducing operating costs.

[0037] Optionally, the heating element 21 is a resistance wire, and the power supply element is used to provide the heating element 21 with the required heating power.

[0038] Understandably, the heating element 21 is composed of resistance wire, which is arranged inside the fermentation tank 1. The design of the resistance wire heating element 21 needs to consider heating efficiency, uniform heat distribution, and prevention of localized overheating. The power supply components typically include a power supply and a control system. It provides a stable power supply to the resistance wire heating element 21 and regulates the heating power and temperature through the control system.

[0039] In other words, the control system in the power supply component can work in conjunction with the temperature sensor to adjust the heating power based on the real-time temperature inside the fermentation tank 1, ensuring that the fermentation process takes place at the optimal temperature. The resistance wire heating element 21, through proper layout, achieves uniform heating within the fermentation tank 1, avoiding localized overheating or cooling, and providing a stable environment for microorganisms. The combination of the power supply component and the temperature control system enables precise control of the heating process, ensuring that the temperature conditions required for fermentation are met.

[0040] Preferably, the side wall of the tank body 1 is provided with a heating gap 13, the heating component 21 is disposed in the heating gap 13, and the heating gap 13 is used to fill the insulation material.

[0041] Understandably, the side wall of tank 1 is designed with a dedicated heating gap 13, which is designed to accommodate the heating element 21. The heating element 21 (such as a resistance wire or heating pipe) is installed within the heating gap 13, and it is responsible for providing heat to the sludge inside the fermentation tank 1. The heating gap 13 is filled with insulation material (such as polyurethane foam), which has good thermal insulation properties, can reduce heat loss, and maintain the temperature stability inside the fermentation tank 1.

[0042] In other words, the insulation material within the heating gap 13 effectively reduces heat loss, helping to maintain a stable temperature within the fermentation tank 1 and reducing energy consumption. The layout of the heating components 21 within the heating gap 13 can be designed more rationally, thereby achieving uniform heating within the fermentation tank 1 and avoiding localized overheating or cold spots. The insulation material protects the heating components 21, preventing changes in the external environment from affecting the heating effect, and also helps improve system safety.

[0043] In some embodiments, the stirring component 32 includes a stirring spindle 321 and a stirring scraper 322. The stirring spindle 321 is connected to the driving component 31, and the stirring scraper 322 is connected to the stirring spindle 321. There are multiple stirring scrapers 322, and the multiple stirring scrapers 322 are arranged at intervals along the circumference of the stirring spindle 321.

[0044] Specifically, such as Figures 1-3 As shown, the stirring spindle 321 can be connected to the output shaft of the drive unit 31 via a reduction gear set and a coupling, so that the drive unit 31 can drive the stirring spindle 321 to rotate. The stirring scrapers 322 are multiple scrapers fixed on the stirring spindle 321, arranged at circumferential intervals along the stirring spindle 321. The design of the scrapers ensures that they can effectively scrape away the sludge adhering to the inner wall of the tank 1.

[0045] It is understood that the stirring scraper 322 can be multiple scraper groups, and a scraper group includes multiple stirring scrapers 322. The multiple scraper groups are arranged at intervals along the extension direction of the stirring main shaft 321 so that the stirring scrapers 322 can cover all the space of the tank 1 as much as possible.

[0046] Optionally, such as Figures 1-3 As shown, the stirring component 32 also includes an annular support 323, which is connected to the stirring main shaft 321. There are multiple annular supports 323, which are arranged at intervals in the vertical direction. Each annular support 323 is equipped with a stirring group so that the stirring scrapers 322 can be arranged in layers inside the tank 1.

[0047] In other words, the design and arrangement of the stirring scraper 322 ensures uniform mixing of sludge within the fermentation tank 1, which helps improve fermentation efficiency. The stirring scraper 322 effectively scrapes away sludge adhering to the inner wall of the tank 1, preventing sludge from depositing within the fermentation tank 1 and maintaining the stability of the fermentation process. The design of the stirring scraper 322 enhances the fluidity of the sludge, helping to maintain its uniformity and flowability, and preventing sedimentation from affecting the fermentation effect.

[0048] In some embodiments, the first end of the stirring scraper 322 is connected to the stirring spindle 321, the second end of the stirring scraper 322 extends toward the inner wall surface of the tank 1, and the stirring scraper 322 has a plurality of through holes.

[0049] Specifically, such as Figures 1-3As shown, the first end of the stirring scraper 322 is connected to the stirring main shaft 321 via a fixing device (such as an annular bracket 323) to ensure that the scraper is stably attached to the main shaft during stirring. The second end of the stirring scraper 322 extends towards the inner wall surface of the tank 1, ensuring that the scraper can effectively scrape off the sludge attached to the inner wall of the tank 1 when rotating. Preferably, there is a certain gap between the second end of the stirring scraper 322 and the inner wall surface of the tank 1 to prevent the stirring scraper 322 from rubbing against the tank 1 during rotation.

[0050] Understandably, the through holes on the stirring scraper 322 reduce sludge adhesion to the scraper surface, thereby enhancing sludge flowability and helping to prevent sludge from settling within the fermentation tank 1. The through-hole design improves the mixing effect of the sludge during the stirring process, resulting in a more even distribution of sludge within the fermentation tank 1. The through-holes on the scraper reduce sludge adhesion to the scraper surface, thus preventing sludge from settling within the fermentation tank 1 and maintaining the stability of the fermentation process.

[0051] Preferably, the diameter of the through holes is typically between 5 and 10 mm, which helps to enhance the flowability of the sludge and prevent the sludge from adhering to the scraper surface.

[0052] In some embodiments, the gas recovery assembly includes a filter component 41 and a condenser component 42 connected in sequence. The recovery inlet is located in the filter component 41. The condenser component 42 includes a condenser body and an activated carbon layer and a molecular sieve layer arranged in sequence along the direction of gas flow. The activated carbon layer and the molecular sieve layer are located in the condenser body. The condenser body has an exhaust port and a liquid drain port. The exhaust port is used to connect to the gas recovery device, and the liquid drain port is used to connect to the liquid recovery device.

[0053] Specifically, such as Figures 1-3 As shown, the top of the tank 1 has a gas outlet, and the recovery inlet is connected to the gas outlet via a pipeline for preliminary filtration of solid particles and other impurities in the gas. The recovery inlet is located in the filter component 41, so that the gas generated by the fermentation tank 1 first enters the filter component 41. The condenser component 42 is located after the filter component 41. The condenser component 42 includes a condenser body and an internal activated carbon layer and molecular sieve layer, which are arranged sequentially along the flow direction of the recovered gas for further purification and condensation of the gas.

[0054] Understandably, the activated carbon layer, located inside the condenser, adsorbs volatile organic compounds and odors from the gas, improving its purity. The molecular sieve layer, following the activated carbon layer, adsorbs moisture from the gas, making it drier. The exhaust port, located at the end of the condenser, discharges the purified and condensed gas and connects to a gas recovery system. The liquid drain port, also located at the end of the condenser, drains the condensed liquid and connects to a liquid recovery system.

[0055] In other words, through the sequential processing of the filter component 41 and the condenser component 42, impurities and moisture in the gas are effectively removed, improving the gas purity. After entering the condenser component 42, the gas's temperature decreases after passing through the activated carbon layer and molecular sieve layer, thereby condensing the moisture in the gas into a liquid state for easy recovery and utilization. After purification and condensation, the quality and purity of the gas are improved, making it suitable for energy utilization or other industrial applications. The liquid recovered through the drain port can be further processed or utilized, maximizing resource utilization.

[0056] Preferably, the condensing component 42 further includes a cooling coil arranged circumferentially around the condensing body. The cooling coil is part of the condensing component 42 and is arranged circumferentially around the condensing body. A cooling medium, such as cold water or cold brine, typically flows inside the cooling coil to absorb heat from the gas and cool it. The cooling medium enters the cooling pipe through a pipe, absorbs heat from the gas, is cooled by the circulation system, and then re-enters the cooling pipe to continue cooling the gas.

[0057] Understandably, the circumferential arrangement of the cooling pipes around the condenser provides a larger cooling area, enabling more effective cooling of the gas below the dew point and promoting moisture condensation. This circumferential cooling pipe design helps achieve uniform cooling of the gas during condensation, avoiding localized overcooling or overheating. By increasing the number of cooling pipes and optimizing their arrangement, condensation efficiency can be improved, and the time required for condensation can be reduced.

[0058] In some embodiments, the sludge co-anaerobic fermentation gas production system of the present invention further includes a control component, which includes a detection element 51 and a control element. At least a portion of the detection element 51 is disposed inside the tank 1 to detect temperature changes inside the tank 1, and at least a portion of the control element is disposed inside the tank 1 to adjust the temperature inside the tank 1. The detection element 51 and the control element are electrically connected.

[0059] Specifically, such as Figures 1-3 As shown, at least a portion of the detection element 51 is disposed within the tank 1 for real-time detection of temperature changes within the tank 1. The detection element 51 can be a temperature sensor, such as a thermocouple or a thermistor. At least a portion of the control unit is disposed within the tank 1 for adjusting the temperature within the tank 1 based on the temperature information provided by the detection element 51. The control unit can be a heater, such as a resistance wire heater, or other types of heating devices; preferably, the control unit is disposed at the bottom of the tank 1. The detection element 51 and the control unit are connected by an electrical connection (such as a signal line, cable, etc.) to ensure that temperature information can be transmitted from the detection element 51 to the control unit, and the control unit adjusts the heating power based on this information.

[0060] Understandably, the control assembly also includes a controller 52, which is located on the outer wall of the tank 1. The controller 52 is electrically connected to the detection element 51 and the control unit. The detection element 51 monitors the temperature changes inside the tank 1 in real time and transmits the data to the controller 52. The controller 52 adjusts the operating state of the control unit according to the set temperature range to ensure that the temperature inside the tank 1 is always maintained within a suitable range (typically 35°C to 38°C). This temperature control system design, through the combination of corrosion-resistant coating and insulation materials, further extends the service life of the equipment and reduces heat loss, ultimately achieving a highly efficient and stable fermentation environment.

[0061] Therefore, the detection element 51 can monitor the temperature changes inside the tank 1 in real time, ensuring that the fermentation process always takes place within a suitable temperature range. Based on the temperature information provided by the detection element 51, the control unit precisely adjusts the heating power to maintain a stable temperature inside the tank 1, providing an optimal growth environment for microorganisms. Electrical connection automates the control process, eliminating the need for manual intervention and improving operational convenience and system reliability. Precise temperature control can improve fermentation efficiency, accelerate gas production, and increase gas yield. Precise temperature control also helps reduce energy waste, lower operating costs, and minimize environmental impact.

[0062] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0063] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0064] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0065] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0066] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0067] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A sludge co-fermentation system for producing gas, characterized in that, The application relates to a sludge treatment device. The device comprises a tank body, a heating assembly, a stirring assembly and a gas recovery assembly. The tank body has a sludge inlet and a sludge outlet, the sludge inlet is arranged at the top of the tank body, and the sludge outlet is arranged at the bottom of the tank body. The heating assembly comprises a heating component arranged inside the sidewall of the tank body, and the heating component is used for heating sludge in the tank body. The stirring assembly comprises a driving member arranged on the tank body and a stirring member connected with the driving member and arranged inside the tank body.

2. The sludge co-fermentation system according to claim 1, wherein, The driving member is used for driving the stirring member to stir sludge in the tank body.

3. The sludge co-fermentation system according to claim 2, wherein, The gas recovery assembly comprises a recovery inlet connected with the tank body, and the gas recovery assembly is used for collecting gas generated by the tank body.

4. The sludge co-fermentation system according to claim 2, wherein, The heating assembly comprises an energy supply component connected with the heating component, and the energy supply component is used for supplying heat source or electric energy to the heating component.

5. The sludge co-fermentation system according to claim 2, wherein, The heating component is in a tubular structure, the energy supply component is used for supplying a heating medium to the heating component, and the temperature of the heating medium is higher than that of sludge in the tank body.

6. The sludge co-fermentation system according to claim 1, wherein, The heating component is an electric resistance wire, and the energy supply component is used for supplying required heating power to the heating component.

7. The sludge co-fermentation system according to claim 6, wherein, The sidewall of the tank body is provided with a heating gap, the heating component is arranged in the heating gap, and the heating gap is filled with thermal insulation material.

8. The sludge co-fermentation system according to claim 1, wherein, The stirring member comprises a stirring spindle connected with the driving member and a plurality of stirring scrapers connected with the stirring spindle and arranged along the circumference of the stirring spindle.

9. The sludge co-fermentation system according to claim 8, wherein, The first end of the stirring scraper is connected with the stirring spindle, the second end of the stirring scraper extends towards the inner wall of the tank body, and the stirring scraper has a plurality of through holes.

10. The sludge co-fermentation gas production system according to any one of claims 1-9, wherein, The gas recovery assembly comprises a filter component and a condensing component connected in sequence, the recovery inlet is arranged on the filter component, the condensing component comprises a condensing body and an activated carbon layer and a molecular sieve layer arranged in sequence along the flow direction of recovery gas, the activated carbon layer and the molecular sieve layer are arranged in the condensing body, the condensing body has a gas outlet and a liquid outlet, the gas outlet is connected with a gas recovery device, and the liquid outlet is connected with a liquid recovery device. The condensing component further comprises a cooling coil arranged along the circumference of the condensing body and surrounding the condensing body. The device further comprises a control assembly, the control assembly comprises a detection member arranged at least partially in the tank body and used for detecting temperature change in the tank body and a control member arranged at least partially in the tank body and used for adjusting the temperature in the tank body, and the detection member is electrically connected with the control member.

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