Energy-saving and environment-friendly sludge fermentation deodorization device and process

Abstract

The application discloses an energy-saving and environment-friendly sludge fermentation deodorization device and process, and belongs to the technical field of sludge treatment. The energy-saving and environment-friendly sludge fermentation deodorization device and process comprise a shell, a heat exchange pipe is arranged around the first conveying pipe, the heat exchange pipe is arranged in the shell, the heat exchange pipe is filled with a heat-conducting medium, and the heat-conducting medium is used for absorbing the heat of fermentation materials and transferring the heat to the gas in the first conveying pipe when the temperature of the fermentation materials is higher than the temperature of the gas in the first conveying pipe. The application solves the problem that the biological heat generated by materials is directly discharged with tail gas in the existing fermentation device, and energy is wasted. The heat exchange pipe is arranged around the first conveying pipe in the shell, the heat-conducting medium is filled in the heat exchange pipe, the heat absorption and heat release characteristics of the heat-conducting medium are utilized, the heat-conducting medium is heated, the heated heat-conducting medium releases heat to the fermentation materials through the heat exchange pipe, and the treatment efficiency of solid waste is improved.

Description

Technical Field

[0001] This invention relates to the field of sludge treatment technology, specifically to an energy-saving and environmentally friendly sludge fermentation and deodorization device and process. Background Technology

[0002] The sludge fermentation deodorization device is an integrated environmental protection equipment mainly used for the aerobic fermentation stabilization treatment of organic wastes such as municipal sludge and industrial sludge, and converting them into garden fertilizer or soil conditioner. Sludge itself is a typical solid waste. Untreated sludge, if piled up indiscriminately, will cause serious soil pollution, water pollution and air pollution. Therefore, sludge treatment is essentially the treatment of solid waste pollution. This device provides sufficient oxygen to the aerobic microorganisms inside the material through a forced oxygen supply system, enabling them to quickly decompose organic matter and release biological heat, thereby achieving the harmlessness, reduction and stabilization of sludge, and ultimately achieving effective control of solid waste pollution.

[0003] Chinese patent CN220907335U discloses a sludge fermentation stirring device, including a tank. A stirring motor is provided at the top of the tank, and the output shaft of the stirring motor extends to the inner top of the tank. A transmission shaft is fixedly connected to the bottom output shaft of the stirring motor. Multiple stirring rods are provided on the outer periphery of the transmission shaft by welding. In this application, a serrated plate is set on one side of the stirring rod, and a vibrating block drives the sliding rod to move back and forth, so that it drives the serrated plate to move back and forth on the outer side of the stirring rod, thereby breaking up the clumps of sludge in the tank and avoiding large-area clumping, which would affect the fermentation of the sludge.

[0004] Although the aforementioned patented fermentation device achieves aerobic fermentation treatment of sludge, its structure lacks effective management and recovery of heat during the fermentation process. In the high-temperature stage of fermentation, the bioheat generated by the material is directly emitted with the exhaust gas, resulting in energy waste. In the low-temperature environment or in the early stage of fermentation, it is impossible to provide auxiliary heating for the material, which leads to slow fermentation start-up and long cycle, affecting the treatment efficiency and hindering the efficient and stable treatment of sludge as solid waste. Summary of the Invention

[0005] The purpose of this invention is to provide an energy-saving and environmentally friendly sludge fermentation and deodorization device and process. By arranging a heat exchange tube around a first transmission tube inside the outer shell and filling the heat exchange tube with a heat-conducting medium, the heat-conducting medium absorbs heat from the material and transfers it to the gas inside the first transmission tube when the temperature of the fermentation material is higher than the temperature of the gas inside the first transmission tube, thus achieving waste heat recovery and utilization. When the temperature of the fermentation material is lower than the temperature of the gas inside the first transmission tube, the heat-conducting medium is heated, and the heated heat-conducting medium releases heat to the fermentation material through the heat exchange tube, improving the efficiency of solid waste treatment. Sludge is a major source of solid waste pollution, and the device and process of this invention effectively treat this pollution source, solving the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an energy-saving and environmentally friendly sludge fermentation deodorization device, comprising a shell, an air inlet pipe for introducing gas is provided on one side of the shell, a first transmission pipe is provided at one end of the air inlet pipe, and a plurality of diversion pipes with air outlets are provided at one end of the first transmission pipe. Gas is sent in through the air inlet pipe and transmitted along the first transmission pipe and the diversion pipes before being discharged from the air outlets. A heat exchange pipe is arranged around the first transmission pipe and is located inside the shell. The heat exchange pipe is filled with a heat-conducting medium. The heat-conducting medium is used to absorb heat from the fermentation material and transfer it to the gas in the first transmission pipe when the temperature of the fermentation material is higher than the temperature of the gas in the first transmission pipe, and to release heat to the fermentation material when the temperature of the fermentation material is lower than the temperature of the gas in the first transmission pipe.

[0007] Preferably, the first transmission pipe is connected to the air inlet pipe, and at least a portion of the first transmission pipe is spirally arranged inside the outer shell. The heat exchange pipe is cylindrically wrapped around the outside of the first transmission pipe, and a first heat-conducting cavity for containing the heat-conducting medium is formed between the inner wall of the heat exchange pipe and the outer wall of the first transmission pipe.

[0008] Preferably, the upper end of the heat exchange tube is connected to a first return pipe communicating with the first heat conduction cavity, and the lower end of the heat exchange tube is connected to a second return pipe communicating with the first heat conduction cavity. A water storage tank is provided between the second return pipe and the first return pipe. The second return pipe is connected to the lower part of the water storage tank through a valve. The upper part of the water storage tank is connected to the inlet of a pump. A three-way valve is provided between the outlet of the pump and the first return pipe. The three-way valve has a first interface, a second interface, and a third interface. The first interface is connected to the outlet of the pump, the second interface is connected to the first return pipe, and the third interface is used to discharge the heat conduction medium to the outside of the device when needed.

[0009] Preferably, the water tank is provided with a liquid storage chamber for containing the heat-conducting medium, and a first electric heating tube for heating the heat-conducting medium is provided in the liquid storage chamber.

[0010] Preferably, the valve is a solenoid valve.

[0011] Preferably, the upper end of the outer shell is provided with a heat insulation frame, the interior of the heat insulation frame forms a second heat conduction cavity, the air inlet pipe is connected to the heat insulation frame, the upper end of the first transmission pipe is connected to the second heat conduction cavity, the heat exchange pipe is vertically inserted into the outer shell, and the upper end of the heat exchange pipe extends into the second heat conduction cavity.

[0012] Preferably, the heat exchange tube is filled with a heat-conducting medium, which is a phase change working fluid.

[0013] Preferably, a second heating element is provided in the second heat-conducting cavity near the air inlet pipe.

[0014] A process for an energy-saving and environmentally friendly sludge fermentation and deodorization device includes the following steps: Step 1: The gas is sent into the first transmission pipe through the air inlet pipe. The gas is then transported through the first transmission pipe and evenly discharged into the fermentation material in the fermentation chamber through the diversion pipe. Step 2: When the temperature of the fermentation material is high and heat dissipation is required, the heat of the fermentation material is transferred to the heat transfer medium inside the heat exchange tube. After absorbing the heat, the heat transfer medium preheats the gas flowing in the first transmission tube. The preheated gas enters the fermentation material through the diversion tube. Step 3: When the temperature of the fermentation material is low and heat needs to be added, the heat transfer medium is heated. The heated heat transfer medium releases heat to the fermentation material through the heat exchange tube, and at the same time, the gas flowing in the first transmission tube is heated. The heated gas enters the fermentation material through the diversion tube.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention, by arranging a heat exchange tube around a first transmission tube inside the outer shell and filling the heat exchange tube with a heat-conducting medium, utilizes the heat absorption and release properties of the heat-conducting medium. When the temperature of the fermentation material is higher than the temperature of the gas inside the first transmission tube, the heat-conducting medium absorbs the heat from the material and transfers it to the gas inside the first transmission tube, thereby realizing the recovery and utilization of waste heat. This solves the problem of energy waste caused by the direct emission of biological heat with exhaust gas during the high-temperature stage of fermentation in the prior art, significantly reduces the energy consumption of the system, embodies the design concept of energy conservation and environmental protection, and enables the solid waste sludge to achieve energy self-optimization during the treatment process.

[0016] 2. This invention heats the heat-conducting medium when the temperature of the fermentation material is lower than the temperature of the gas in the first transmission pipe. The heated heat-conducting medium then releases heat to the fermentation material through the heat exchange pipe, while simultaneously heating the gas flowing through the first transmission pipe. This provides an auxiliary heating function, solving the problem of slow fermentation start-up and long cycle caused by the inability to provide auxiliary heating to the material in low-temperature environments or at the initial stage of fermentation in existing technologies. It effectively shortens the fermentation cycle, improves the efficiency of solid waste treatment, and achieves rapid stabilization treatment of sludge, a typical solid waste, thereby controlling solid waste pollution at its source. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall external structure of Embodiment 1 of the present invention; Figure 2 This is a cross-sectional view showing the positional relationship of the first heat-conducting cavity in Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the connection relationship of the water storage tank in Embodiment 1 of the present invention; Figure 4 This is a schematic diagram of the transmission trajectory of the second return pipe in Embodiment 1 of the present invention; Figure 5 This is a schematic diagram of the overall external structure of Embodiment 2 of the present invention; Figure 6 This is a cross-sectional view of the internal structure of the outer shell in Embodiment 2 of the present invention; Figure 7 This is a cross-sectional view of the internal structure of the heat insulation frame of the present invention.

[0018] In the diagram: 1. Outer shell; 2. Exhaust pipe; 3. Inlet pipe; 4. Feed pipe; 5. Motor; 6. Heat exchanger pipe; 7. First reflux pipe; 8. Three-way valve; 9. Water tank; 10. Pump; 11. Valve; 12. Discharge pipe; 13. Stirring paddle; 14. Diverter pipe; 15. First heat conduction chamber; 16. First transmission pipe; 17. Second transmission pipe; 18. First electric heating element; 19. Liquid storage chamber; 20. Third transmission pipe; 21. Heat insulation frame; 22. Liquid replenishment pipe; 23. Second heat conduction chamber; 24. Second electric heating element; 25. Second reflux pipe. Detailed Implementation

[0019] The present invention will be further described below with reference to specific embodiments.

[0020] Example 1, such as Figure 1As shown in the figure, this embodiment of an energy-saving and environmentally friendly sludge fermentation deodorization device is mainly used for the harmless, volume-reducing and stabilizing treatment of solid wastes such as municipal sludge and industrial sludge. Sludge is the main carrier of solid waste pollution. This device transforms sludge into usable resources through aerobic fermentation treatment, thereby achieving effective treatment of solid waste pollution. It includes an outer shell 1, and a fermentation chamber for containing fermentation materials is formed inside the outer shell 1. To promote uniform fermentation of materials, a stirring paddle 13 is set in the middle position inside the outer shell 1. A motor 5 is fixed at the upper end of the outer shell 1. The output shaft of the motor 5 is driven and connected to the upper end of the stirring paddle 13 to drive the stirring paddle 13 to rotate.

[0021] The motor 5 is provided with a feed pipe 4 and an exhaust pipe 2 on both sides, which are connected to the fermentation chamber. Sludge and fermentation auxiliary materials are fed into the outer shell 1 through the feed pipe 4. The exhaust gas generated during the fermentation process is discharged through the exhaust pipe 2. The upper end of the exhaust pipe 2 is connected to a gas purification treatment device, which is used to purify the exhaust gas to meet the emission standards. The gas purification treatment device can be a conventional biological filter, chemical scrubbing tower or activated carbon adsorption device in this field. Its specific structure and working principle are existing technologies and will not be described in detail here.

[0022] To ensure successful sludge fermentation, air needs to be continuously supplied to the interior of the outer shell 1. In this embodiment, multiple diversion pipes 14 are horizontally arranged at the lower part of the interior of the outer shell 1. The diversion pipes 14 are suspended above the bottom of the outer shell 1, with a gap between them and the bottom of the outer shell 1. Multiple air outlets are opened at the lower end of the diversion pipes 14. The oxygen supplied to the interior of the outer shell 1 is first transmitted to the interior of the diversion pipes 14 and then evenly discharged from the air outlets. The supplied gas is evenly sent into the interior of the outer shell 1, passes upward through the fermentation material layer, and is finally discharged from the exhaust pipe 2. This provides sufficient oxygen for the microorganisms, ensures the stable progress of the aerobic fermentation process, and at the same time suppresses the generation of odor from the source, reduces the burden of subsequent waste gas treatment, and reflects the design concept of energy conservation and environmental protection.

[0023] The lower end of the outer shell 1 is provided with a discharge pipe 12 that communicates with the fermentation chamber. This pipe is used to discharge the fermentation products after fermentation is completed, transforming the sludge, which was originally a solid waste pollutant, into garden fertilizer or soil conditioner, thereby realizing the resource utilization of waste.

[0024] like Figure 2 As shown, the upper end of the feed pipe 4 is provided with an openable and closable sealing cover plate, which is used to seal the feed pipe 4 after feeding to prevent the odor from leaking out during fermentation. The sealing cover plate can adopt a hinged flip-type or threaded tightening type structure, and a sealing gasket is provided between the sealing cover plate and the upper end face of the feed pipe 4.

[0025] like Figure 3As shown, a first transmission pipe 16 is provided inside the outer shell 1. At least a portion of the first transmission pipe 16 is spirally coiled inside the outer shell 1. One end of the first transmission pipe 16 is sealed with an air inlet pipe 3, which is used to connect to a fan. The fan draws in externally filtered gas and transmits it to the inside of the first transmission pipe 16. The other end of the first transmission pipe 16 is provided with a second transmission pipe 17, which is sealed to one end of a plurality of diversion pipes 14. After being transmitted through the first transmission pipe 16, the gas is diverted by the second transmission pipe 17, so that the gas can be evenly distributed among the plurality of diversion pipes 14. This allows the gas replenished to the inside of the outer shell 1 to be evenly discharged from the air outlet, thus replenishing the fermentation position with gas.

[0026] In order to achieve energy recycling and reduce system operating energy consumption, in this embodiment, a heat exchange tube 6 is sleeved on the outside of the first transmission tube 16, and a first heat conduction cavity 15 is provided between the inner wall of the heat exchange tube 6 and the outer wall of the first transmission tube 16.

[0027] In this embodiment, the first heat-conducting cavity 15 is used to contain the heat-conducting medium, preferably water. Water's high specific heat capacity and good fluidity are utilized for heat storage and transfer. When high heat is generated at the fermentation location, the heat from the material is transferred to the water in the first heat-conducting cavity 15 through the heat exchange tube 6. After absorbing heat, the water preheats the gas flowing through the first transmission tube 16. The preheated gas exits through the gas outlet and enters the fermentation material layer, reusing the recovered heat for the fermentation process. This achieves waste heat recovery and utilization, effectively reducing system energy consumption. When the temperature of the fermentation material is low and additional heat is needed, the water in the first heat-conducting cavity 15 can be heated. The heated water can preheat the incoming gas or directly release heat to the material through the heat exchange tube 6, ensuring the fermentation process proceeds stably at a suitable temperature, shortening the fermentation cycle, and improving solid waste treatment efficiency.

[0028] To adjust the water temperature inside the first heat-conducting cavity 15, the upper end of the heat exchange tube 6 is connected to a first return pipe 7 that communicates with the first heat-conducting cavity 15, and the lower end of the heat exchange tube 6 is connected to a second return pipe 25 that communicates with the first heat-conducting cavity 15. The second return pipe 25 is connected to the lower part of the water storage tank 9 through a valve 11. The upper part of the water storage tank 9 is connected to the inlet of the pump 10. A three-way valve 8 is provided between the outlet of the pump 10 and the first return pipe 7. The water storage tank 9 is provided with a liquid storage chamber 19, and a first electric heating tube 18 for heating the heat-conducting medium is provided in the liquid storage chamber 19.

[0029] When active circulation heating is required, valve 11 and pump 10 are opened. Pump 10 extracts the heat-conducting medium heated by the first electric heating tube 18 from the liquid storage chamber 19 and sends it into the first heat-conducting chamber 15 through the three-way valve 8 and the first return pipe 7. After the medium flows through the first heat-conducting chamber 15, it flows back to the liquid storage chamber 19 through the second return pipe 25 and valve 11, forming a circulation loop.

[0030] like Figure 4 As shown, in order to facilitate the pump 10 to draw the heat transfer medium in the liquid storage chamber 19, the inlet of the pump 10 is connected to a third transmission pipe 20 that extends into the liquid storage chamber 19.

[0031] The three-way valve 8 has a first port, a second port and a third port. The first port is connected to the outlet of the pump 10, the second port is connected to the first return pipe 7, and the third port is used to discharge the heat transfer medium to the outside of the device when needed, so as to facilitate periodic cleaning or replacement of the heat transfer medium.

[0032] A replenishment pipe 22, which is connected to the liquid storage chamber 19, is also provided on one side of the water storage tank 9 for replenishing the heat transfer medium into the system.

[0033] When it is necessary to discharge the old medium, adjust the three-way valve 8 to open the third port, and start the pump 10 to extract and empty the heat transfer medium. When it is necessary to replenish the new medium, close the valve 11 and inject the heat transfer medium directly into the liquid storage chamber 19 through the replenishment pipe 22. After the injection is completed, open the valve 11 to restore the circulation.

[0034] Valve 11 can be selected as a solenoid valve or a manual valve according to control requirements. In this embodiment, a solenoid valve is preferred.

[0035] A process for an energy-saving and environmentally friendly sludge fermentation and deodorization device includes the following steps: Gas is introduced through the inlet pipe 3 and enters the first transmission pipe 16. The gas transmitted through the first transmission pipe 16 enters the second transmission pipe 17 and is then distributed to multiple branch pipes 14. The transmitted gas is discharged from the outlet at the lower end of the branch pipe 14. When the temperature of the fermentation material is high and heat dissipation is required, the heat from the material is transferred to the heat-conducting medium in the first heat-conducting chamber 15 through the heat exchange pipe 6. After absorbing the heat, the heat-conducting medium preheats the gas flowing through the first transmission pipe 16. The preheated gas is discharged from the outlet and enters the fermentation material layer, realizing the recovery and utilization of waste heat. When the temperature of the fermentation material is low and heat needs to be supplemented, The first electric heating tube 18 is activated to heat the heat-conducting medium in the storage chamber 19. The valve 11 and pump 10 are opened, and the three-way valve 8 is adjusted to open the second interface. The heated heat-conducting medium is drawn by the pump 10 and sent into the first heat-conducting chamber 15 through the first return pipe 7. The high-temperature heat-conducting medium sent into the first heat-conducting chamber 15 releases heat to the fermentation material through the heat exchange pipe 6, and at the same time heats the gas flowing in the first transmission pipe 16. The heated gas re-enters the fermentation material layer to achieve auxiliary heating. After flowing through the first heat-conducting chamber 15, the medium flows back to the storage chamber 19 through the second return pipe 25 and valve 11 to form a cycle.

[0036] Example 2, as Figure 5 and Figure 6As shown, the sludge fermentation and deodorization device of this embodiment has a general structure that is similar to that of Embodiment 1, except that the arrangement of the heat exchange tubes 6 and the heat exchange principle are different.

[0037] Specifically, in this embodiment, the first return pipe 7, three-way valve 8, water tank 9, pump 10, valve 11, first electric heating tube 18, liquid storage chamber 19, third transmission pipe 20, and replenishment pipe 22 are not provided. The heat exchange tube 6 is no longer sleeved outside the first transmission pipe 16, but is distributed inside the outer shell 1 in a multiple vertically inserted manner. In this embodiment, the first transmission tube 16 is still spirally coiled inside the outer casing 1.

[0038] like Figure 7 As shown, the heat exchange tube 6 in this embodiment is a sealed metal tube filled with a heat-conducting medium, which is a phase change working fluid, forming an independent heat pipe unit. The lower end of the heat exchange tube 6 is an evaporation section, which is buried in the fermentation material, and the upper end is a condensation section, which extends into the second heat-conducting cavity 23. Through the evaporation and condensation cycle of the phase change working fluid, the passive and efficient transfer of heat is achieved without the need for additional power drive, further reducing the system's operating energy consumption.

[0039] A heat insulation frame 21 is provided around the upper end of the outer casing 1, surrounding the feed pipe 4, motor 5, and exhaust pipe 2. A second heat-conducting cavity 23 is formed inside the heat insulation frame 21. Unlike embodiment 1, in this embodiment, the air inlet pipe 3 is located on the side of the heat insulation frame 21 and communicates with the second heat-conducting cavity 23. The upper end of the first transmission pipe 16 is also communicated with the second heat-conducting cavity 23. After the external gas enters the second heat-conducting cavity 23 through the air inlet pipe 3, it is then transported downward to the diversion pipe 14 through the first transmission pipe 16.

[0040] The upper end of the heat exchange tube 6 extends into the interior of the second heat conduction cavity 23, forming the condensation section of the heat pipe. When the temperature of the fermentation material is high, the heat of the material is transferred to the phase change working fluid inside through the evaporation section of the heat exchange tube 6. The working fluid absorbs heat and evaporates, transferring the heat to the condensation section. The gas flowing through the second heat conduction cavity 23 comes into contact with the condensation section of the heat exchange tube 6, absorbs heat and is preheated, and then is sent into the fermentation material layer through the first transmission pipe 16, realizing the recovery of waste heat without power and achieving significant energy-saving effect.

[0041] A second electric heating tube 24 is installed inside the second heat conduction chamber 23 near the air inlet pipe 3. When the temperature of the fermentation material is low and heat needs to be added, the second electric heating tube 24 is activated to preheat the gas entering the second heat conduction chamber 23. When the preheated gas flows through the condensation section of the heat exchange tube 6, it transfers heat to the phase change working fluid in the heat exchange tube 6. The phase change working fluid releases heat to the fermentation material through the evaporation section to achieve auxiliary heating.

[0042] A process for an energy-saving and environmentally friendly sludge fermentation and deodorization device includes the following steps: Gas is fed into the second heat-conducting cavity 23 inside the insulation frame 21 from the inlet pipe 3, then enters the first transmission pipe 16, and is transferred to the second transmission pipe 17. From the second transmission pipe 17, the gas is split into multiple branch pipes 14, and finally evenly discharged from the fermentation chamber through the outlet at the lower end of the branch pipes 14. When the temperature of the fermentation material is high and heat dissipation is required, the heat is transferred to the internal phase change working fluid through the evaporation section of the heat exchange pipe 6. The working fluid absorbs heat and evaporates, transferring the heat to the condensation section. The gas flowing through the second heat-conducting cavity 23 contacts the condensation section of the heat exchange pipe 6, absorbs heat, and is then preheated. The preheated gas enters the fermentation material layer through the first transmission pipe 16, realizing the recovery of waste heat without power. When the temperature of the fermentation material is low and heat needs to be supplemented, the second electric heating tube 24 is activated to preheat the gas entering the second heat conduction chamber 23. When the preheated gas flows through the condensation section of the heat exchange tube 6, it transfers heat to the phase change working fluid in the heat exchange tube 6. The phase change working fluid releases heat to the fermentation material through the evaporation section, realizing auxiliary heating. At the same time, the preheated gas enters the material layer through the first transmission pipe 16 to further supplement the heat, ensuring the stable and efficient operation of the solid waste fermentation process.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0044] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. An energy-saving and environmentally friendly sludge fermentation and deodorization device, comprising a shell (1), characterized in that, An air inlet pipe (3) for introducing gas is provided on one side of the outer shell (1). A first transmission pipe (16) is provided at one end of the air inlet pipe (3). A plurality of diversion pipes (14) with air outlets are provided at one end of the first transmission pipe (16). Gas is sent in through the air inlet pipe (3) and transmitted along the first transmission pipe (16) and the diversion pipes (14) before being discharged from the air outlets. A heat exchange pipe (6) is provided around the first transmission pipe (16). The heat exchange pipe (6) is located inside the outer shell (1). The heat exchange pipe (6) is filled with a heat-conducting medium. The heat-conducting medium is used to absorb the heat of the fermentation material and transfer it to the gas in the first transmission pipe (16) when the temperature of the fermentation material is higher than the temperature of the gas in the first transmission pipe (16). When the temperature of the fermentation material is lower than the temperature of the gas in the first transmission pipe (16), it releases heat to the fermentation material.

2. The energy-saving and environmentally friendly sludge fermentation and deodorization device according to claim 1, characterized in that, The first transmission pipe (16) is connected to the air inlet pipe (3). At least a portion of the first transmission pipe (16) is spirally arranged inside the outer shell (1). The heat exchange pipe (6) is cylindrically wrapped around the outside of the first transmission pipe (16). A first heat-conducting cavity (15) for accommodating the heat-conducting medium is formed between the inner wall of the heat exchange pipe (6) and the outer wall of the first transmission pipe (16).

3. The energy-saving and environmentally friendly sludge fermentation and deodorization device according to claim 2, characterized in that, The upper end of the heat exchange tube (6) is connected to a first return pipe (7) communicating with the first heat conduction cavity (15), and the lower end of the heat exchange tube (6) is connected to a second return pipe (25) communicating with the first heat conduction cavity (15). A water storage tank (9) is provided between the second return pipe (25) and the first return pipe (7). The second return pipe (25) is connected to the lower part of the water storage tank (9) through a valve (11). The upper part of the water storage tank (9) is connected to the inlet of a pump (10). A three-way valve (8) is provided between the outlet of the pump (10) and the first return pipe (7). The three-way valve (8) has a first interface, a second interface and a third interface. The first interface is connected to the outlet of the pump (10), the second interface is connected to the first return pipe (7), and the third interface is used to discharge the heat conduction medium to the outside of the device when needed.

4. The energy-saving and environmentally friendly sludge fermentation and deodorization device according to claim 3, characterized in that, The water tank (9) is provided with a liquid storage chamber (19) for containing the heat-conducting medium, and a first electric heating tube (18) for heating the heat-conducting medium is provided in the liquid storage chamber (19).

5. The energy-saving and environmentally friendly sludge fermentation and deodorization device according to claim 3, characterized in that, The valve (11) is a solenoid valve.

6. The energy-saving and environmentally friendly sludge fermentation and deodorization device according to claim 1, characterized in that, The upper end of the outer shell (1) is provided with a heat insulation frame (21), and a second heat conduction cavity (23) is formed inside the heat insulation frame (21). The air inlet pipe (3) is connected to the heat insulation frame (21), the upper end of the first transmission pipe (16) is connected to the second heat conduction cavity (23), and the heat exchange pipe (6) is vertically inserted into the outer shell (1), with the upper end of the heat exchange pipe (6) extending into the second heat conduction cavity (23).

7. The energy-saving and environmentally friendly sludge fermentation and deodorization device according to claim 6, characterized in that, The heat exchange tube (6) is filled with a heat-conducting medium, which is a phase change working fluid.

8. The energy-saving and environmentally friendly sludge fermentation and deodorization device according to claim 7, characterized in that, A second electric heating tube (24) is provided in the second heat-conducting cavity (23) near the air inlet pipe (3).

9. A process for an energy-saving and environmentally friendly sludge fermentation and deodorization device according to any one of claims 1-8, characterized in that, Includes the following steps: Step 1: The gas is sent into the first transmission pipe (16) through the air inlet pipe (3). The gas is transported through the first transmission pipe (16) and evenly discharged into the fermentation material in the fermentation chamber through the diversion pipe (14). Step 2: When the temperature of the fermentation material is high and heat dissipation is required, the heat of the fermentation material is transferred to the heat transfer medium inside the heat exchange tube (6). After absorbing the heat, the heat transfer medium preheats the gas flowing in the first transmission tube (16). The preheated gas enters the fermentation material through the diversion tube (14). Step 3: When the temperature of the fermentation material is low and heat needs to be added, the heat transfer medium is heated. The heated heat transfer medium releases heat to the fermentation material through the heat exchange tube (6), and at the same time heats the gas flowing in the first transmission tube (16). The heated gas enters the fermentation material through the diversion tube (14).

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