An anaerobic ammonia oxidation bacteria-enriched heat preservation filler device and a sewage treatment system

Abstract

This invention discloses a heat-insulating packing device and a wastewater treatment system for enriching anaerobic ammonia-oxidizing bacteria, specifically relating to the field of biological denitrification technology. The device includes a packing assembly comprising multiple packing units. Each packing unit includes two packing plates and a connector. The two packing plates are arranged parallel to each other at intervals via the connector. Each packing plate includes a supporting heat-conducting plate and a layer of sponge packing fixedly laid on both sides of the supporting heat-conducting plate. The supporting heat-conducting plate has multiple through holes and a heat flow channel is provided inside the supporting heat-conducting plate, within which a high-temperature medium flows. This invention enables the efficient enrichment of anaerobic ammonia-oxidizing bacteria under low-temperature conditions, while providing them with a stable and suitable growth temperature, maintaining the excellent denitrification performance of the bacteria, and improving the adaptability of the anaerobic ammonia oxidation process.

Description

Technical Field

[0001] This invention relates to the field of biological denitrification technology, and in particular to a heat-insulating packing device and a wastewater treatment system for enriching anaerobic ammonia-oxidizing bacteria. Background Technology

[0002] Traditional biological nitrogen removal processes primarily remove nitrogen from wastewater by enriching nitrifying and denitrifying bacteria. This process requires sufficient aeration to ensure the oxidative removal of ammonia nitrogen, and since denitrifying bacteria are mostly heterotrophic microorganisms, an external carbon source is usually needed to maintain ideal nitrogen removal efficiency.

[0003] In contrast, anaerobic ammonia oxidation (AA) denitrification processes utilize autotrophic microorganisms that thrive in anaerobic environments, significantly reducing carbon source dosage and aeration energy consumption while achieving high denitrification efficiency. However, AA bacteria exhibit slow growth rates, requiring longer sludge retention times for effective enrichment. In mainstream wastewater treatment reactors, this can conflict with the sludge retention times required by other microorganisms. Domestic and international research indicates that AA bacteria possess excellent adsorption properties for packing materials; therefore, adding packing materials is an effective way to achieve AA bacteria enrichment.

[0004] However, anaerobic ammonia oxidizing bacteria are quite sensitive to temperature changes, with their optimal growth temperature being 30℃~37℃. In the winter of northern my country, the influent temperature of sewage treatment plants is often insufficient to meet their growth requirements; at the same time, the large volume of municipal sewage also makes it difficult to create a suitable growth environment for anaerobic ammonia oxidizing bacteria by heating the influent. Summary of the Invention

[0005] The purpose of this invention is to provide a heat-insulating packing device and a wastewater treatment system for enriching anaerobic ammonia oxidizing bacteria, so as to solve the problems existing in the prior art. It can achieve efficient enrichment of anaerobic ammonia oxidizing bacteria under low temperature environment, while providing them with a stable and suitable growth temperature, maintaining the excellent denitrification performance of the bacteria, and improving the adaptability of anaerobic ammonia oxidation process.

[0006] To achieve the above objectives, the present invention provides the following solution: This invention provides a heat-insulating packing device for enriching anaerobic ammonia-oxidizing bacteria, comprising a packing assembly, wherein the packing assembly includes multiple packing units, each packing unit includes two packing plates and a connector, the two packing plates are arranged parallel to each other at intervals through the connector, each packing plate includes a supporting heat-conducting plate and a sponge packing layer fixedly laid on both sides of the supporting heat-conducting plate, the supporting heat-conducting plate has multiple through holes, and a heat flow channel is provided inside the supporting heat-conducting plate, wherein a high-temperature medium flows in the heat flow channel.

[0007] Preferably, the supporting heat-conducting plate is a corrugated folded plate.

[0008] Preferably, the supporting heat-conducting plate is formed by mixing and sintering heat-conducting ceramic powder and hydroxyapatite powder.

[0009] Preferably, the heat flow channel is a serpentine channel.

[0010] Preferably, the sponge filler layer is a polyurethane sponge filler layer, and the polyurethane sponge filler layer is filled with a composite slurry, which is composed of activated zeolite powder, nano iron suspension and binder.

[0011] Preferably, the packing assembly further includes a fixing frame, in which a plurality of packing units are spaced apart from top to bottom. The fixing frame has a vertical sliding groove, in which the connecting member is slidably disposed. The fixing frame has a locking member, which can fix the relative position of the connecting member and the fixing frame.

[0012] Preferably, each of the packing units further includes multiple thermal bridges, with multiple thermal bridges evenly spaced between the two packing plates, and each thermal bridge having multiple flow holes.

[0013] Preferably, each of the thermal bridges includes a thermally conductive silicone grease layer and two closed-cell EPDM sponge layers, with one closed-cell EPDM sponge layer fixedly laid on each side of the thermally conductive silicone grease layer.

[0014] This invention also provides a wastewater treatment system, including a reactor, a preheater, a heat exchanger, a circulating water tank, a temperature sensor, a controller, and a heat-insulating packing device for enriching anaerobic ammonia oxidizing bacteria. The heat-insulating packing device for enriching anaerobic ammonia oxidizing bacteria is disposed within the reactor, which is used to contain wastewater. The preheater includes a hot flue gas inlet, a hot flue gas outlet, a sludge inlet, and a sludge outlet. The hot flue gas inlet is connected to the flue gas outlet of a boiler, the sludge inlet is connected to the sludge outlet of a sedimentation tank, and the sludge outlet is connected to the reactor. The heat exchanger includes a shell-side inlet, a shell-side outlet, a tube-side inlet, and a tube-side outlet. The shell-side inlet... The shell-side outlet is connected to the hot flue gas outlet and the flue gas inlet of the flue gas purification system, respectively. The tube-side inlet and the tube-side outlet are connected to the outlet of the cold water chamber and the inlet of the hot water chamber of the circulating water tank, respectively. The outlet of the hot water chamber of the circulating water tank is connected to the inlet of each of the hot flow channels. The inlet of the cold water chamber of the circulating water tank is connected to the outlet of each of the hot flow channels. The temperature sensor is connected to the packing unit for monitoring the temperature of the packing unit. The heat-insulating packing device for enriching anaerobic ammonia oxidizing bacteria, the reactor, the heat exchanger, the circulating water tank, and the temperature sensor are all connected to the controller signal.

[0015] Preferably, the shell side of the heat exchanger is filled with a paraffin-based phase change energy storage material.

[0016] The present invention achieves the following technical effects compared to the prior art: This invention provides a heat-insulating packing device and wastewater treatment system for enriching anaerobic ammonia-oxidizing bacteria. Through a packing plate structure integrating a supporting heat-conducting plate with a built-in heat flow channel and a sponge packing layer, precise constant temperature control can be achieved in the core area where anaerobic ammonia-oxidizing bacteria attach, providing a constant and suitable growth temperature environment for the bacteria. This effectively overcomes the strong inhibitory effect of low temperature on the metabolic activity and proliferation rate of anaerobic ammonia-oxidizing bacteria, improving the enrichment efficiency of the bacteria under low-temperature conditions. The integrated design of the supporting heat-conducting plate and the sponge packing layers on both sides, combined with a through-hole structure, achieves temperature control without hindering water flow and pollutant mass transfer. This provides sufficient and stable attachment sites for anaerobic ammonia-oxidizing bacteria and promotes uniform growth and renewal of the biofilm. The structure of the supporting heat-conducting plate and sponge packing layer is simple, easy to process and assemble, and controls material costs while ensuring the strength and service life of the packing. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the packing assembly in Example 1; Figure 2 This is a schematic diagram of the packing unit in Example 1; Figure 3 This is a cross-sectional view of the packing unit in Example 1; Figure 4 This is a side view of the supporting heat-conducting plate in Example 1; Figure 5 This is a top view of the supporting heat-conducting plate in Example 1; Figure 6 This is a schematic diagram showing the connection between the two supporting heat-conducting plates and the heat-conducting bridge in Example 1; Figure 7 This is a schematic diagram of the thermal bridge in Example 1; Figure 8 This is a cross-sectional view of the thermal bridge in Example 1; Figure 9 This is a schematic diagram of the wastewater treatment system in Example 2; Figure 10 This is a schematic diagram showing the connection between the insulation packing assembly at different temperatures and the circulating water tank in Example 2.

[0019] In the diagram: 1. Packing assembly; 2. Packing unit; 3. Packing plate; 4. Connector; 5. Supporting heat-conducting plate; 6. Sponge packing layer; 7. Through hole; 8. Heat flow channel; 9. Fixing frame; 10. Thermal bridge; 11. Flow hole; 12. Thermally conductive silicone grease layer; 13. Closed-cell EPDM sponge layer; 14. Reactor; 15. Preheater; 16. Heat exchanger; 17. Circulating water tank; 18. Hot water chamber; 19. Cold water chamber; 20. Temperature sensor; 21. Controller; 22. Removable partition plate; 23. Greywater pipe. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] The purpose of this invention is to provide a heat-insulating packing device and a wastewater treatment system for enriching anaerobic ammonia oxidizing bacteria, so as to solve the problems existing in the prior art. It can achieve efficient enrichment of anaerobic ammonia oxidizing bacteria under low temperature environment, while providing them with a stable and suitable growth temperature, maintaining the excellent denitrification performance of the bacteria, and improving the adaptability of anaerobic ammonia oxidation process.

[0022] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Example 1 This embodiment provides a heat-insulating packing device for enriching anaerobic ammonia-oxidizing bacteria, such as... Figures 1-5As shown, the assembly includes a packing component 1, which comprises multiple packing units 2. Each packing unit 2 includes two packing plates 3 and a connector 4. The two packing plates 3 are arranged parallel to each other at intervals via the connector 4. Each packing plate 3 includes a supporting heat-conducting plate 5 and a sponge packing layer 6 fixedly laid on both sides of the supporting heat-conducting plate 5. The supporting heat-conducting plate 5 has multiple through holes 7 and a heat flow channel 8 is provided inside the supporting heat-conducting plate 5, through which a high-temperature medium flows. By introducing a constant-temperature heat medium into the supporting heat-conducting plate 5, the supporting heat-conducting plate can be uniformly heated throughout, providing a constant and suitable growth temperature environment for the microbial community. This improves the microbial community enrichment efficiency under cold climate / low-temperature conditions and solves the problems of slow start-up, easy loss of microbial community, and insufficient microbial holding capacity in anaerobic ammonia oxidation processes in northern regions and winter. The supporting heat-conducting plate 5, which bears the functions of temperature control and structural support, is integrated with the sponge packing layer 6, which provides bio-attachment sites, in a composite design. Combined with the through-hole structure 7 on the supporting heat-conducting plate 5, this design achieves the core temperature control function without hindering wastewater flow or the mass transfer and diffusion of nitrogenous pollutants. The supporting heat-conducting plate 5 and the sponge packing layer 6 have a simple structure, are easy to process and assemble, and control material costs while ensuring the strength and service life of the packing, giving the device good engineering practicality and prospects for large-scale application.

[0024] In a further preferred embodiment of this invention, the supporting heat-conducting plate 5 is a corrugated folded plate. Compared to a flat plate, the corrugated folded plate significantly increases the effective attachment surface area of ​​the supporting heat-conducting plate 5 and the outer sponge packing layer 6, providing more attachment sites for anaerobic ammonia-oxidizing bacteria, greatly increasing the bacterial holding capacity of the packing, enhancing the microbial enrichment effect, and further improving the denitrification capacity and treatment efficiency. The corrugated folded plate also has higher bending and compressive strength, and is less prone to deformation and collapse than a flat plate. It can stably support the sponge packing layers 6 on both sides for a long time, preventing the packing from collapsing and agglomerating under hydraulic impact, thus improving the overall structural reliability and service life of the device.

[0025] In a further preferred embodiment of this invention, the supporting heat-conducting plate 5 is formed by mixing and sintering thermally conductive ceramic powder and hydroxyapatite powder. This ensures structural strength and thermal conductivity while providing the filler with excellent simultaneous phosphorus removal capabilities. Hydroxyapatite can stably release trace amounts of calcium ions in an aquatic environment. These calcium ions can combine with phosphate ions in the water to form calcium phosphate precipitates with extremely low solubility and high chemical stability. Simultaneously, the calcium ions enriched on the surface of the hydroxyapatite can directly react with phosphates at the interface, forming phosphate surface precipitates in situ. This efficiently solidifies and separates phosphorus from the water, achieving simultaneous denitrification and phosphorus removal, significantly broadening the pollutant removal range and process applicability of the device.

[0026] In this embodiment, it is further preferred that the heat flow channel 8 is a serpentine channel, which can extend the flow path of the heat medium and the heat exchange time, improve heat exchange efficiency and temperature control uniformity, eliminate heat exchange dead zones, and ensure stable temperature throughout the packing. Further preferred, backflushing joints are installed at the inlet and outlet of the heat flow channel 8, enabling convenient online backflushing cleaning of the heat flow channel 8. This effectively removes scale, impurities, and deposits accumulated during long-term operation, preventing blockages and poor flow in the heat flow channel 8. Simultaneously, the backflushing operation does not require disassembling the packing unit 2 and the supporting heat-conducting plate 5, simplifying the channel cleaning and maintenance process and reducing operation and maintenance difficulty and labor costs.

[0027] In a further preferred embodiment of this invention, the sponge filler layer 6 is a polyurethane sponge filler layer 6, which can achieve efficient adsorption and targeted enrichment of anaerobic ammonia-oxidizing bacteria. Simultaneously, the water layer adsorbed by the sponge also has a certain heat-insulating function, maintaining the temperature of the filler layer at around 30°C. The polyurethane sponge filler layer 6 is filled with a composite slurry, which is a mixture of activated zeolite powder, nano-iron suspension, and binder. The composite slurry, prepared by mixing activated zeolite powder, nano-iron suspension, and binder, loads the internal pores of the polyurethane sponge filler, significantly improving the adsorption selectivity of the filler for anaerobic ammonia-oxidizing bacteria and enhancing the targeted colonization and enrichment effect of the bacterial community.

[0028] The loading process of composite slurry in sponge is as follows: The activated zeolite powder and nano-iron suspension are mixed according to the set ratio. After adding the binder, the mixture is stirred thoroughly to prepare a uniform and viscous composite slurry. The pretreated polyurethane sponge is completely immersed in the composite slurry and vacuum impregnated for 10-20 minutes. The negative pressure is used to allow the composite slurry to fully penetrate and fill the pores inside the sponge. The impregnated sponge is pulled up at a constant rate to remove excess slurry from the surface, so as to avoid excessive local coating thickness that may block the pores and ensure smooth water flow and mass transfer channels.

[0029] In a further preferred embodiment of this invention, the packing assembly 1 further includes a fixing frame 9. Multiple packing units 2 are spaced apart from top to bottom within the fixing frame 9. The fixing frame 9 has a vertical groove, and the connecting member 4 is slidably disposed within the groove. The fixing frame 9 also has a locking member that can fix the relative position of the connecting member 4 and the fixing frame 9. Based on the hydraulic load, water quality conditions, and biofilm growth status within the reactor 14, the packing units 2 slide up and down along the fixing frame 9, adjusting the spacing between two adjacent packing units 2, adjusting the packing density and the cross-sectional area of ​​the flow channel, optimizing the water flow pattern within the reactor 14, avoiding short-circuiting, blockage, and hydraulic dead zones, and enhancing the mass transfer efficiency between the aqueous phase and the biofilm. When cleaning of the packing units 2 is required, they are pulled out along the groove for easy cleaning. The locking member ensures the stability of the packing units 2 during operation, preventing displacement, shaking, or stacking of the packing units 2 under hydraulic impact. In a further preferred embodiment, each of the four legs of the fixing frame 9 is provided with a vertical T-shaped slide groove. The four corners of the two filler plates 3 are fixedly connected by four connectors 4. The four connectors 4 are slidably disposed in the four T-shaped slide grooves respectively. The ends of each connector 4 form T-shaped sliders, which slide in cooperation with the T-shaped slide grooves. The fixing frame 9 is provided with multiple fixing holes along the length of the slide groove. The T-shaped sliders are provided with threaded holes. The locking bolts pass through the fixing holes and cooperate with the threaded holes to realize the sliding adjustment and locking of the sliders at any position in the slide groove.

[0030] In the implementation of this embodiment, it is further preferred that, as follows: Figures 6-7 As shown, each packing unit 2 also includes multiple thermal bridges 10. Multiple thermal bridges 10 are evenly spaced between two packing plates 3, and each thermal bridge 10 has multiple flow holes 11. The thermal bridges 10 can establish a transverse heat conduction path between the two packing plates 3, improving the heat transfer efficiency and temperature uniformity between the two packing plates 3, making the internal temperature field of the entire packing unit 2 more stable and uniform, and further ensuring that the anaerobic ammonia-oxidizing bacteria are in a constant and suitable growth environment. The multiple flow holes 11 on the thermal bridges 10 can achieve efficient heat conduction without obstructing water flow and pollutant mass transfer, avoiding the formation of hydraulic dead zones, and ensuring the normal operation of the water flow and denitrification reaction within the reactor 14.

[0031] In the implementation of this embodiment, it is further preferred that, as follows: Figure 8As shown, each thermal bridge 10 includes a thermally conductive silicone grease layer 12 and two closed-cell EPDM sponge layers 13. A closed-cell EPDM sponge layer 13 is fixedly laid on both sides of the thermally conductive silicone grease layer 12. The thermal bridge 10 adopts a composite structure of an inner thermally conductive silicone grease layer 12 and an outer closed-cell EPDM sponge layer 13, forming a sandwich-like functional structure with internal thermal conductivity and external thermal insulation. The inner thermally conductive silicone grease layer 12 enhances the rapid heat transfer between the two packing plates 3, improving the temperature control response speed and overall temperature uniformity; the outer closed-cell EPDM sponge layer 13 has excellent thermal insulation performance, which can effectively prevent the heat inside the packing unit 2 from being lost to the external water body, reduce heat loss, reduce heating energy consumption, and improve temperature control efficiency.

[0032] Example 2 This embodiment provides a wastewater treatment system, such as Figure 9 As shown, the system includes a reactor 14, a preheater 15, a heat exchanger 16, a circulating water tank 17, a temperature sensor 20, a controller 21, and an insulated packing device for enriching anaerobic ammonia oxidizing bacteria as described in Example 1. The insulated packing device for enriching anaerobic ammonia oxidizing bacteria is installed inside the reactor 14, which is used to contain wastewater. The preheater 15 includes a hot flue gas inlet, a hot flue gas outlet, a sludge inlet, and a sludge outlet. The hot flue gas inlet is connected to the flue gas outlet of a boiler, the sludge inlet is connected to the sludge outlet of a sedimentation tank, and the sludge outlet is connected to the reactor 14. The heat exchanger 16 includes a shell-side inlet, a shell-side outlet, a tube-side inlet, and a tube-side outlet. The shell-side inlet and shell-side outlet are respectively connected to the hot flue gas outlet. The inlet and outlet of the flue gas purification system are connected to the flue gas inlet. The tube-side inlet and outlet are connected to the outlet of the cold water chamber 19 of the circulating water tank 17 and the inlet of the hot water chamber 18 of the circulating water tank 17, respectively. The outlet of the hot water chamber 18 of the circulating water tank 17 is connected to the inlet of each hot flow channel 8. The inlet of the cold water chamber 19 of the circulating water tank 17 is connected to the outlet of each hot flow channel 8. The temperature sensor 20 is connected to the packing unit 2 to monitor the temperature of the packing unit 2. The temperature sensor 20 can be set between two packing plates 3. The heat-insulating packing device for enriching anaerobic ammonia oxidizing bacteria, the reactor 14, the heat exchanger 16, the circulating water tank 17 and the temperature sensor 20 are all connected to the controller 21 for signal connection.

[0033] The wastewater treatment system fully recovers and utilizes the waste heat from high-temperature flue gas generated in processes such as sludge incineration and boiler heating in the wastewater treatment plant. The high-temperature flue gas and returned sludge from the sedimentation tank are fed into the preheater 15 to preheat the returned sludge, which is then returned to the reactor 14. The flue gas after primary heat exchange continues to be fed into the heat exchanger 16 for secondary heat exchange with the circulating medium. After absorbing heat in the heat exchanger 16, the circulating medium enters the hot water chamber 18 of the circulating water tank 17 and is then transported to the internal heat flow channel 8 of the packing material to heat the packing material and biofilm. The circulating medium, after releasing heat, returns to the cold water chamber 19, completing the closed-loop circulation. Temperature signals are collected in real time by temperature sensors 20 arranged between the packing plates 3, and the controller 21 performs closed-loop regulation of the heat exchange and circulation processes to achieve precise and constant control of the packing material temperature.

[0034] Further preferred, such as Figure 10 As shown, the packing assemblies in different compartments or areas within reactor 14 are heated using independent heat circulation medium loops. A removable partition plate 22 separates the hot water chamber 18 and cold water chamber 19 of the circulating water tank 17 into compartments. The hot water output from the heat exchanger 16 is stored in the corresponding compartments of the tank, and each compartment is connected to a medium-water pipe 23 for temperature fine-tuning, thus achieving independent and precise temperature control of each zone in reactor 14. When differentiated temperature adjustment is required for each zone of reactor 14, the removable partition plate 22 is kept in the inserted state, allowing each compartment to operate independently. By opening the medium-water pipe 23 connected to the corresponding compartment of reactor 14, the temperature of the heat medium in that compartment is adjusted. This one-to-one correspondence between the water tank compartments and the zones of reactor 14 enables precise and independent control of the packing temperature in each zone. When no zone control is required and the overall temperature of the packing material in reactor 14 needs to be kept consistent, the removable partition plate 22 can be pulled out to allow the liquids inside the hot water chamber 18 and cold water chamber 19 of the circulating water tank 17 to be interconnected and fully mixed, ensuring uniform temperature of the heat medium throughout the entire process, thereby achieving uniform and constant temperature control of all packing material in reactor 14.

[0035] In a further preferred embodiment of this invention, the shell side of the heat exchanger 16 is filled with a paraffin-based phase change energy storage material, which can continuously provide heat to the liquid when the flue gas volume is low or the temperature is low; the shell side of the heat exchanger 16 is designed with a spiral flow guiding structure, which can increase the contact area between the flue gas and the energy storage material.

[0036] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A heat-insulating packing device for enriching anaerobic ammonia-oxidizing bacteria, characterized in that: The device includes a packing assembly, which comprises multiple packing units. Each packing unit includes two packing plates and a connector. The two packing plates are arranged in parallel at intervals through the connector. Each packing plate includes a supporting heat-conducting plate and a sponge packing layer fixedly laid on both sides of the supporting heat-conducting plate. The supporting heat-conducting plate has multiple through holes and a heat flow channel is provided inside the supporting heat-conducting plate, in which a high-temperature medium flows.

2. The heat-insulating packing device for enriching anaerobic ammonia-oxidizing bacteria according to claim 1, characterized in that: The supporting heat-conducting plate is a corrugated folded plate.

3. The heat-insulating packing device for enriching anaerobic ammonia-oxidizing bacteria according to claim 1, characterized in that: The supporting heat-conducting plate is made by mixing and sintering heat-conducting ceramic powder and hydroxyapatite powder.

4. The heat-insulating packing device for enriching anaerobic ammonia-oxidizing bacteria according to claim 1, characterized in that: The heat flow channel is a serpentine channel.

5. The heat-insulating packing device for enriching anaerobic ammonia-oxidizing bacteria according to claim 1, characterized in that: The sponge filler layer is a polyurethane sponge filler layer, and the polyurethane sponge filler layer is filled with a composite slurry, which is composed of activated zeolite powder, nano iron suspension and binder.

6. The heat-insulating packing device for enriching anaerobic ammonia-oxidizing bacteria according to claim 1, characterized in that: The packing assembly further includes a fixing frame, in which multiple packing units are spaced apart from top to bottom. The fixing frame has a vertical sliding groove, in which the connector is slidably disposed. The fixing frame has a locking element, which can fix the relative position of the connector and the fixing frame.

7. The heat-insulating packing device for enriching anaerobic ammonia-oxidizing bacteria according to claim 1, characterized in that: Each of the packing units further includes multiple thermal bridges, with multiple thermal bridges evenly spaced between the two packing plates, and each thermal bridge having multiple flow holes.

8. The heat-insulating packing device for enriching anaerobic ammonia-oxidizing bacteria according to claim 7, characterized in that: Each of the thermal bridges includes a thermally conductive silicone grease layer and two closed-cell EPDM sponge layers, with a closed-cell EPDM sponge layer fixedly laid on each side of the thermally conductive silicone grease layer.

9. A wastewater treatment system, characterized in that: The system includes a reactor, a preheater, a heat exchanger, a circulating water tank, a temperature sensor, a controller, and a heat-insulating packing device for enriching anaerobic ammonia oxidizing bacteria as described in any one of claims 1-8. The heat-insulating packing device for enriching anaerobic ammonia oxidizing bacteria is disposed within the reactor, which is used to contain wastewater. The preheater includes a hot flue gas inlet, a hot flue gas outlet, a sludge inlet, and a sludge outlet. The hot flue gas inlet is connected to the flue gas outlet of a boiler, the sludge inlet is connected to the sludge outlet of a sedimentation tank, and the sludge outlet is connected to the reactor. The heat exchanger includes a shell-side inlet, a shell-side outlet, a tube-side inlet, and a tube-side outlet. The shell-side inlet and the... The shell-side outlet is connected to the hot flue gas outlet and the flue gas inlet of the flue gas purification system, respectively. The tube-side inlet and the tube-side outlet are connected to the outlet of the cold water chamber of the circulating water tank and the inlet of the hot water chamber of the circulating water tank, respectively. The outlet of the hot water chamber of the circulating water tank is connected to the inlet of each of the hot flow channels. The inlet of the cold water chamber of the circulating water tank is connected to the outlet of each of the hot flow channels. The temperature sensor is connected to the packing unit for monitoring the temperature of the packing unit. The heat-insulating packing device for enriching anaerobic ammonia-oxidizing bacteria, the reactor, the heat exchanger, the circulating water tank, and the temperature sensor are all connected to the controller signal.

10. The wastewater treatment system according to claim 9, characterized in that: The shell side of the heat exchanger is filled with paraffin-based phase change energy storage material.

Images