Anaerobic thermostatic fermentor

Abstract

The utility model discloses an anaerobic constant temperature fermentation tank, including the jar body and the heat exchange subassembly, be provided with the thermometer in the jar body, the heat exchange subassembly includes the heat exchange pipe, the heat source supply unit and the cold source supply unit, and the heat exchange pipe is close to the outer surface of jar body, and the heat source supply unit and the cold source supply unit are communicated with the heat exchange pipe respectively, are used respectively to the heat exchange pipe in conveying the heating medium and the cooling medium, and the temperature of heating medium is greater than the cooling medium. Compared with prior art, the anaerobic constant temperature fermentation tank provided by the utility model sets up the heat exchange pipe in the jar body, when cleaning and repairing and replacing the heat exchange pipe, do not need to clean the jar body inside, and set up two sets of medium supply unit simultaneously, supply the heating medium of high temperature and the cooling medium of low temperature respectively, are used for warming or cooling the jar body, realize the temperature more fast regulation and control.

Description

Technical Field

[0001] This utility model relates to the field of anaerobic fermentation technology, specifically to an anaerobic constant temperature fermenter. Background Technology

[0002] Large-scale mesophilic biogas digesters are suitable for various fields, including wastewater treatment, resource utilization of livestock and poultry manure from large-scale farms, and biogas fermentation projects for municipal solid waste and urban kitchen waste. Mesophilic biogas anaerobic fermentation technology is a highly efficient biomass energy conversion technology. It promotes the anaerobic digestion of organic matter by microorganisms by controlling the anaerobic fermentation temperature at around 38℃, thereby producing biogas.

[0003] Methanogens are a type of microorganism that produce methane. They operate under anaerobic conditions and are highly sensitive to ambient temperature. Studies have shown that fermentation temperature fluctuations exceeding 1°C / day can lead to anaerobic digestion failure. Currently, to maintain optimal activity and stability, heat exchange coils are often installed inside anaerobic fermenters. However, in various applications, these methods suffer from scale buildup in the heat exchangers, reducing heat exchange efficiency. Heat exchanger maintenance requires tank cleaning, and these methods are not widely adaptable to the actual production and operation requirements of different regions and industries. Maintaining a constant temperature environment is also difficult, and any significant temperature fluctuation can adversely affect the growth of methanogens and methane production. Utility Model Content

[0004] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose an anaerobic constant temperature fermenter to solve the technical problems in the prior art where the heat exchanger is located inside the fermenter, which is prone to scaling and affects the temperature control effect, and is also inconvenient to clean.

[0005] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0006] This utility model provides an anaerobic constant temperature fermenter, including: a tank body and a heat exchange assembly. A thermometer is installed in the tank body. The heat exchange assembly includes a heat exchange tube, a heat source supply unit, and a cold source supply unit. The heat exchange tube is attached to the outer surface of the tank body. The heat source supply unit and the cold source supply unit are respectively connected to the heat exchange tube and are used to deliver a heating medium and a cooling medium into the heat exchange tube, respectively. The temperature of the heating medium is higher than that of the cooling medium.

[0007] In some embodiments, the tank body has a circular cross-section, the heat exchange tube includes a spiral tube, the spiral tube has a helical structure, the spiral tube is coaxially arranged with the tank body and wound around the outer side of the tank body; the heat source supply unit and the cold source supply unit are respectively connected to the spiral tube.

[0008] In some embodiments, the heat exchange tube further includes a main outlet pipe, which is arranged along the height direction of the tank and is connected to the spiral pipe through multiple interfaces, each of which is arranged along the height direction of the tank; the heat source supply unit and the cold source supply unit are respectively connected to the main outlet pipe to form a closed loop pipeline.

[0009] In some embodiments, the input end of the heat exchange component is located at the bottom of the spiral tube, and the output end of the heat exchange component is located at the bottom of the main outlet pipe.

[0010] In some embodiments, the heat exchange tube further includes a plurality of valves, each valve being disposed at a corresponding interface.

[0011] In some embodiments, the tank has a liquid level observation window on its side, or the tank is equipped with a liquid level gauge.

[0012] In some embodiments, a plurality of connectors are also included, each connector comprising a plurality of connecting portions and a plurality of fixing portions, the connecting portions and the fixing portions being alternately connected, the connecting portions being connected to the tank body, the fixing portions being semi-circular, and the fixing portions clamping and fixing the heat exchange tube.

[0013] In some embodiments, a stirring device is also included, wherein the stirring head of the stirring device is disposed inside the tank.

[0014] In some embodiments, an insulation layer is also included, which covers the outer surface of the tank and the heat exchange tube.

[0015] In some embodiments, the heat source supply unit further includes a first storage tank, a first circulation pipeline, a first circulation pump, and a first temperature regulating device. The first storage tank is used to store the heating medium. The first storage tank is connected to the heat exchange tube through the first circulation pipeline to form a closed pipeline. The first circulation pump is disposed on the first circulation pipeline to drive the heating medium to circulate. The first temperature regulating device is disposed in the first storage tank to maintain the temperature of the heating medium.

[0016] Compared with the prior art, the anaerobic constant temperature fermenter provided by this utility model sets the heat exchange tubes outside the tank. When cleaning, repairing or replacing the heat exchange tubes, it is not necessary to clean the inside of the tank. At the same time, two media supply units are set up to supply high-temperature heating media and low-temperature cooling media respectively for heating or cooling the tank, so as to achieve faster temperature control. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the anaerobic constant temperature fermenter provided in this embodiment of the utility model;

[0018] Figure 2This is a structural diagram of the connector. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0020] Please see Figure 1 This anaerobic constant temperature fermenter includes a tank body 1 and a heat exchange component 2.

[0021] Tank 1 is a container for anaerobic fermentation. As is easy to understand, it has the necessary structures to achieve anaerobic fermentation, such as inlet, outlet, drain, and exhaust. A thermometer is installed inside tank 1 to detect the internal temperature.

[0022] The heat exchange assembly 2 includes a heat exchange tube 21, a heat source supply unit, and a cold source supply unit. The heat exchange tube 21 is attached to the outer surface of the tank 1. The heat source supply unit and the cold source supply unit are respectively connected to the heat exchange tube 21 and are used to supply a heating medium and a cooling medium into the heat exchange tube 21, respectively. The temperature of the heating medium is higher than that of the cooling medium. The temperature of the heating medium is slightly higher than the fermentation temperature and is used to heat the tank 1. The temperature of the cooling medium is slightly lower than the fermentation temperature and is used to cool the tank 1. The heating medium and the cooling medium can be pure water at different temperatures.

[0023] This anaerobic constant temperature fermenter has heat exchange tubes 21 installed outside the tank body 1. When cleaning, repairing or replacing the heat exchange tubes 21, it is not necessary to clean the inside of the tank body 1. At the same time, two media supply units are set up to supply high-temperature heating media and low-temperature cooling media respectively for heating or cooling the tank body 1, so as to achieve faster and more timely temperature control.

[0024] In some embodiments, the tank 1 has a liquid level observation window 11 on its side; in other embodiments, the tank 1 is equipped with a liquid level gauge. Both the liquid level observation window 11 and the liquid level gauge are used to detect the amount of fermentation material inside the tank 1.

[0025] In some embodiments, the tank body 1 has a circular cross-section, and the heat exchange tube 21 includes a spiral tube 211. The spiral tube 211 has a helical structure, is coaxially arranged with the tank body 1, and is wound around the outer surface of the tank body 1. The heat source supply unit and the cold source supply unit are respectively connected to the spiral tube 211.

[0026] In some embodiments, the heat exchange tube 21 further includes a main outlet pipe 212, which is arranged along the height direction of the tank 1. The main outlet pipe 212 is connected to the spiral pipe 211 through multiple interfaces, which are arranged along the height direction of the tank 1. The heat source supply unit and the cold source supply unit are also connected to the main outlet pipe 212 to form a closed loop pipeline.

[0027] In some embodiments, the input end of the heat exchange component 2 is located at the bottom of the spiral tube 211, and the output end of the heat exchange component 2 is located at the bottom of the main outlet pipe 212. Preferably, the heat exchange tube 21 also includes multiple valves 213, each corresponding to an interface. During anaerobic fermentation, the valves 213 above the fermentation material are opened, and the valves 213 below the fermentation material are closed. This ensures that the heating or cooling medium only fills the spiral tube 211 slightly above the fermentation material, leaving the spiral tube 211 next to the cavity above the fermentation material empty. This reduces energy consumption and improves energy efficiency.

[0028] In some embodiments, the heat source supply unit includes a first storage tank 221, a first circulation pipeline 222, a first circulation pump 223, and a first temperature regulating device. The first storage tank 221 is used to store the heating medium, and the first storage tank 221 is connected to the heat exchange tube 21 through the first circulation pipeline 222 to form a closed pipeline. The first circulation pump 223 is disposed on the first circulation pipeline 222 to drive the heating medium to circulate. The first temperature regulating device is disposed in the first storage tank 221 to maintain the temperature of the heating medium.

[0029] Similarly, the cold source supply unit includes a second storage tank 231, a second circulation pipeline 232, a second circulation pump 233, and a second temperature control device. The second storage tank 231 is used to store the heating medium, and the second storage tank 231 is connected to the heat exchange tube 21 through the second circulation pipeline 232 to form a closed pipeline. The second circulation pump 233 is disposed on the second circulation pipeline 232 to drive the heating medium to circulate. The second temperature control device is disposed in the second storage tank 231 to maintain the temperature of the heating medium.

[0030] If both the required high and low temperatures are above room temperature, the first and second temperature control devices can be heaters with temperature control. If the required low temperature is below room temperature, the second temperature control device can be a thermoelectric cooler with temperature control.

[0031] As shown in the figure, in a preferred embodiment, the heat source supply unit and the cold source supply unit can share most of the circulation pipeline and circulation pump. A three-way valve 224 is installed on the circulation pipeline to switch the heat source supply unit or the cold source supply unit to participate in temperature regulation.

[0032] In some embodiments, the first storage unit 221 and the second storage unit 231 may take the form of a tank, container, pool, or similar structure. The first temperature control device may be a heater with temperature control. The second temperature control device may be a combination of a heat sink and a fan.

[0033] In some embodiments, the anaerobic constant-temperature fermenter further includes a stirring device 3. The stirring head of the stirring device 3 is disposed inside the tank body 1 and is used to stir the fermentation material to make its temperature uniform. The stirring device 3 includes a motor, a connecting rod, and a stirring head. The motor is located outside the tank body, and the rotating shaft of the motor is fixedly connected to the stirring head through the connecting rod, driving the stirring head to rotate to stir the fermentation material evenly.

[0034] Please see Figure 2 In some embodiments, the anaerobic constant temperature fermenter further includes multiple connectors 4, each connector 4 comprising several connecting parts 41 and several fixing parts 42. The connecting parts 41 and fixing parts 42 are alternately connected. The connecting parts 41 are connected to the tank body 1, and the connection method can be screws, pins, clips, welding, adhesive, etc. The fixing parts 42 are semi-circular and clamp the heat exchange tube 21.

[0035] In some embodiments, the anaerobic constant-temperature fermenter further includes an insulation layer 5, which covers the outer surface of the tank body 1 and the heat exchange tubes 21. The insulation layer 5 can be a sprayed insulation coating, or an installed insulation board, insulation cotton, etc. This application does not limit the form of the insulation layer 5, as long as it can achieve the insulation effect.

[0036] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. An anaerobic constant-temperature fermenter, characterized in that, include: The tank body, wherein a thermometer is installed inside the tank body; A heat exchange assembly includes a heat exchange tube, a heat source supply unit, and a cold source supply unit. The heat exchange tube is attached to the outer surface of the tank. The heat source supply unit and the cold source supply unit are respectively connected to the heat exchange tube and are used to deliver a heating medium and a cooling medium into the heat exchange tube, respectively. The temperature of the heating medium is higher than that of the cooling medium.

2. The anaerobic constant-temperature fermenter according to claim 1, characterized in that, The tank has a circular cross-section, and the heat exchange tube includes a spiral tube with a helical structure. The spiral tube is coaxially arranged with the tank and wound around the outer side of the tank. The heat source supply unit and the cold source supply unit are respectively connected to the spiral tube.

3. The anaerobic constant-temperature fermenter according to claim 2, characterized in that, The heat exchange tube also includes a main outlet pipe, which is arranged along the height of the tank. The main outlet pipe is connected to the spiral pipe through multiple interfaces, and each interface is arranged along the height of the tank. The heat source supply unit and the cold source supply unit are respectively connected to the main outlet pipe to form a closed loop pipeline.

4. The anaerobic constant-temperature fermenter according to claim 3, characterized in that, The input end of the heat exchange component is located at the bottom of the spiral tube, and the output end of the heat exchange component is located at the bottom of the main outlet pipe.

5. The anaerobic constant-temperature fermenter according to claim 3, characterized in that, The heat exchange tube also includes multiple valves, each of which is installed at the interface.

6. The anaerobic constant-temperature fermenter according to claim 1, characterized in that, The tank has a liquid level observation window on its side, or the tank is equipped with a liquid level gauge.

7. The anaerobic constant-temperature fermenter according to claim 1, characterized in that, It also includes multiple connectors, each connector comprising several connecting parts and several fixing parts, the connecting parts and the fixing parts being alternately connected, the connecting parts being connected to the tank body, the fixing parts being semi-circular, and the fixing parts clamping and fixing the heat exchange tube.

8. The anaerobic constant-temperature fermenter according to claim 1, characterized in that, It also includes a stirring device, the stirring head of which is disposed inside the tank.

9. The anaerobic constant-temperature fermenter according to claim 1, characterized in that, It also includes an insulation layer that covers the outer surface of the tank and the heat exchange tube.

10. The anaerobic constant-temperature fermenter according to claim 1, characterized in that, The heat source supply unit further includes a first storage tank, a first circulation pipeline, a first circulation pump, and a first temperature regulating device. The first storage tank is used to store the heating medium. The first storage tank is connected to the heat exchange tube through the first circulation pipeline to form a closed pipeline. The first circulation pump is disposed on the first circulation pipeline to drive the heating medium to circulate. The first temperature regulating device is disposed in the first storage tank to maintain the temperature of the heating medium.

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