Denitrifying deep-bed filter device

Abstract

The application provides a denitrification deep-bed filter device and belongs to the technical field of sewage treatment equipment. The device comprises a pool body, the pool body is connected with a first sewage discharge pipe and a second sewage discharge pipe, the inside of the pool body is provided with a sewage inlet pipe, the sewage inlet pipe is connected with a clean water pipe, the pool body is connected with a filter plate and a liquid storage tank, the pool body is connected with a liquid level sensor one and a liquid level sensor two, and the device further comprises: an impact assembly for washing the filter plate; and a blowing assembly for stirring the filter material. The device has the beneficial effects that: the device realizes efficient cooperation of filtering denitrification and self-cleaning, the combination design of the arc-shaped filter plate and the V-shaped spiral blowing rod solves the problems of uneven turning of the filter material of the traditional filter and deposition of the bottom layer, the airflow disturbance and particle collision are used to strengthen the impurity stripping, and the high-pressure rotary flushing of the duck-billed impact head and chemical soaking are used, so that the biofilm and stubborn scale layer on the surface of the filter plate and the filter material can be completely removed, and the damage and hardening of the filter material can be effectively avoided.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment equipment technology, and more specifically, to a denitrification deep bed filter device. Background Technology

[0002] In the field of wastewater treatment, with the rapid development of industrialization and urbanization, the amount of wastewater generated has increased dramatically, and its composition has become increasingly complex and diverse. Current wastewater treatment systems, such as ozone catalytic oxidation systems, magnetic coagulation sedimentation tanks, and activated carbon adsorption regeneration processes, have played a certain role in the initial purification of wastewater, but they still face many challenges in the advanced treatment stages, especially in the removal of nitrate nitrogen.

[0003] A denitrifying deep-bed filter is a water treatment technology that removes nitrates from water through a biological denitrification process, thereby purifying the water. The denitrifying deep-bed filter relies on the close contact between wastewater and specially selected filter media (such as homogeneous quartz sand) within the filter bed. This allows microorganisms to degrade organic matter in the wastewater. Simultaneously, denitrifying bacteria convert nitrates into harmless nitrogen gas in an anaerobic environment, achieving a denitrification effect. Finally, the filtered water is collected through filter bricks and a collection tank at the bottom of the denitrifying deep-bed filter. During the denitrification process, as nitrate nitrogen is continuously reduced to nitrogen gas, a large amount of nitrogen gas gradually accumulates in the deep-bed filter. This nitrogen gas causes the wastewater to circulate between the media, increasing the contact between microorganisms and the water flow, thus improving filtration efficiency. When suspended solids or... When microorganisms multiply to a certain extent, the filter bed needs to be backwashed regularly. However, traditional backwashing mechanisms are fixed in position, have limited flushing range, and have obvious dead corners during backwashing, making it easy for dirt to accumulate on the filter media surface. This not only hinders the contact between oxygen and wastewater but also inhibits the activity and growth of denitrifying microorganisms. At the same time, after long-term operation, the filter media layer will trap a large amount of suspended solids, and the proliferation of microorganisms can easily cause filter bed blockage. If cleaning is not thorough, it will continuously reduce the filtration efficiency and effluent quality of the filter bed, seriously affecting the continuous operating efficiency and long-term economic efficiency of the equipment. These problems together restrict the efficient and stable application of denitrification deep bed filters. How to invent a denitrification deep bed filter device to solve these problems has become an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0004] To overcome the above shortcomings, the present invention provides a denitrification deep bed filter device, which aims to solve the problems of obvious dead corners during backwashing, which make it easy for dirt to accumulate on the surface of the filter media, inhibiting the activity and growth of denitrifying microorganisms. At the same time, after long-term operation, the filter media layer will trap a large amount of suspended solids, and the proliferation of microorganisms will easily cause the filter layer to become clogged, affecting the filtration efficiency of the filter.

[0005] This invention is implemented as follows: This invention provides a denitrification deep bed filter device, comprising a tank body connected to a first and a second drain pipe, an inlet pipe connected to the inside of the tank body, a clean water pipe, a filter plate and a storage tank connected to the tank body, and a level sensor and a level sensor connected to the tank body. The device also includes: An impact assembly, located inside the tank, is used for rinsing the filter plates; An air blowing assembly is located inside the tank and is used to agitate the filter media.

[0006] Preferably, the interior of the pool is provided with an overflow tank and a reaction tank, the inner wall of the overflow tank is provided with an overflow hole, the inner wall of the overflow tank is fixedly connected to a liquid level sensor, the inner wall of the reaction tank is fixedly connected to a liquid level sensor, and the overflow tank is fixedly connected to a drain pipe.

[0007] Preferably, the filter plate is detachably connected to the reaction tank, the filter plate is arc-shaped, and the filter plate is located below the air blowing assembly.

[0008] Preferably, the pool body is fixedly connected to the liquid storage tank and the sewage inlet pipe respectively. The liquid storage tank and the sewage inlet pipe are fixedly connected. A solenoid valve is provided at the connection between the liquid storage tank and the sewage inlet pipe. A first sewage pipe and a second sewage pipe are provided at one end of the pool body. A support plate is fixedly connected to the side wall of the pool body.

[0009] Preferably, the air blowing assembly includes a hollow cylinder and an air inlet pipe, one end of the hollow cylinder is rotatably connected to the inner wall of the air inlet pipe, and the air inlet pipe is fixedly connected to the pool body.

[0010] Preferably, the outer wall of the hollow cylinder is fixedly connected with a plurality of spirally distributed air blowing rods, the air blowing rods are arranged in a "V" shape, the inner wall of the air blowing rods is provided with air holes, and the end of the hollow cylinder away from the air inlet pipe passes through the side wall of the pool body and the support plate.

[0011] Preferably, the impact assembly includes a motor, a toothed chain, and a drive toothed disc. The motor is fixedly connected to a support plate, one end of the motor is fixedly connected to the end of the hollow cylinder located outside the pool body, the outer wall of the hollow cylinder is fixedly connected to the drive toothed disc, and the drive toothed disc is meshed with the toothed chain.

[0012] Preferably, the impact assembly further includes a rotating cylinder, an inclined plate, and a diversion pipe. The outer wall of the diversion pipe is fixedly connected to one end of the inlet pipe. Several rotating cylinders are arranged in a linear array inside the reaction tank. One end of each rotating cylinder is rotatably connected to the diversion pipe. The inclined plate is fixedly connected to the inner wall of the reaction tank and is located below the rotating cylinder.

[0013] Preferably, the end of the rotating cylinder away from the diversion pipe is rotatably connected to the inner wall of the reaction tank, a gear is fixedly connected to the outer wall of the rotating cylinder, the gear meshes with a gear chain, and a plurality of impact heads arranged in an array are fixedly connected to the outer wall of the rotating cylinder. Each impact head includes a connecting end and a spraying end, and the spraying end is arranged in a duckbill shape.

[0014] Preferably, one end of one of the rotating cylinders is fixedly connected to an extension column, the end of the extension column away from the rotating cylinder passes through the side wall of the pool body, and a driven gear plate is fixedly connected to the outer wall of the extension column. The driven gear plate and the driving gear plate are connected by a gear chain drive.

[0015] The beneficial effects of this invention are: 1. This invention uses a hollow cylinder with one end rotatably connected to an air inlet pipe. A spirally distributed air-blowing rod is fixed to the outer wall, with air vents on the air-blowing rod. The hollow cylinder passes through the tank body and support plate and is connected to a motor. The motor drives the hollow cylinder to rotate, and compressed air is introduced through the air inlet pipe, distributed to the air-blowing rod through the hollow cylinder, and then sprayed at high speed through the air vents. The "V"-shaped air-blowing rod, combined with the arc-shaped filter plate, forms a stirring trajectory with bottom-up and middle-layer diffusion, thus overcoming the pain points of uneven agitation and bottom-layer deposition in traditional filter media. Through airflow disturbance and particle collision, impurity stripping is enhanced, preventing filter media caking and providing a loose filter media environment for subsequent rinsing, thereby improving cleaning efficiency.

[0016] 2. In this invention, the motor extends through a drive gear, a gear chain, and a driven gear, connected to a rotating cylinder. The rotating cylinder achieves synchronous rotation of multiple cylinders via gears and a gear chain. The rotating cylinder is equipped with an array of duckbill-shaped impact heads. A diversion pipe supplies mixed flushing liquid to the rotating cylinder. The motor drives the rotating cylinder to rotate, and the impact heads convert the mixed flushing liquid into a high-pressure jet, performing omnidirectional rotating flushing of the filter plate and the bottom of the reaction tank. After the liquid level submerges the impact heads, the rotating cylinder drives the liquid circulation, assisting in the uniform distribution of the mixed flushing liquid. The high-pressure jet thoroughly removes stubborn scale and biofilm from the surface of the filter plate, leaving no dead corners. Furthermore, the circulation effect, combined with chemical solvent soaking, achieves synergistic cleaning through physical peeling and chemical decomposition, avoiding damage to the filter media and ensuring that the filter plate and filter media regain their permeability. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of a denitrification deep bed filter device provided in an embodiment of the present invention; Figure 2 This is a top view schematic diagram of a denitrification deep bed filter device provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the internal structure of a denitrification deep bed filter device provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the filter plate structure of a denitrification deep bed filter device provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the bottom structure of a denitrification deep bed filter device provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the impact component structure of a denitrification deep bed filter device provided in an embodiment of the present invention; Figure 7 This invention provides a denitrification deep bed filter device. Figure 6 Enlarged schematic diagram of the structure at point A in the middle; Figure 8 This is a schematic diagram of the impact head structure of a denitrification deep bed filter device provided in an embodiment of the present invention; Figure 9 This is a schematic diagram of the air blowing component structure of a denitrification deep bed filter device provided in an embodiment of the present invention; Figure 10 This is a schematic diagram of the half-section structure of the air blowing rod of a denitrification deep bed filter device provided in an embodiment of the present invention; Figure 11 This is a schematic diagram of the half-section structure of a denitrification deep bed filter device provided in an embodiment of the present invention.

[0019] In the diagram: 1. Pool body; 101. Overflow trough; 102. Reaction tank; 103. Overflow hole; 2. First drain pipe; 3. Impact assembly; 31. Motor; 32. Gear chain one; 33. Rotating cylinder; 34. Inclined plate; 35. Impact head; 351. Connecting end; 352. Spray end; 36. Diverter pipe; 37. Gear chain two; 38. Driving gear disc; 39. Gear; 310. Driven gear disc; 311. Extension column; 4. Liquid level sensor one; 5. Second drain pipe; 6. Drain pipe; 7. Liquid level sensor two; 8. Filter plate; 9. Air blowing assembly; 91. Hollow cylinder; 92. Air blowing rod; 93. Air inlet pipe; 94. Vent hole; 10. Storage tank; 11. Sewage inlet pipe; 12. Clean water pipe; 13. Support plate; 14. Solenoid valve. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, 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. Example

[0021] Reference Figures 1-11 A denitrification deep bed filter device includes a tank body 1, with a first drain pipe 2 and a second drain pipe 5 connected to the tank body 1. An inlet pipe 11 is provided inside the tank body 1, and the inlet pipe 11 is connected to a clean water pipe 12. The device is characterized by having a filter plate 8 and a storage tank 10 connected to the tank body 1, and having a liquid level sensor 4 and a liquid level sensor 7 connected to the tank body 1. It also includes: Impact assembly 3 is located inside the tank body 1 and is used for rinsing the filter plate 8. Air blowing assembly 9 is located inside pool body 1 and is used to agitate the filter media.

[0022] Furthermore, the interior of the pool body 1 is provided with an overflow trough 101 and a reaction tank 102. The inner wall of the overflow trough 101 is provided with an overflow hole 103. The inner wall of the overflow trough 101 is fixedly connected to a liquid level sensor 4. The inner wall of the reaction tank 102 is fixedly connected to a liquid level sensor 7. The overflow trough 101 is fixedly connected to a drain pipe 6. The pool body 1 is fixedly connected to a storage tank 10 and a sludge inlet pipe 11. The storage tank 10 and the sludge inlet pipe 11 are fixedly connected. A solenoid valve 14 is provided at the connection between the storage tank 10 and the sludge inlet pipe 11. One end of the pool body 1 is provided with a first sludge pipe 2 and a second sludge pipe 5. A support plate 13 is fixedly connected to the side wall of the pool body 1.

[0023] It should be noted that: The interior of tank 1 is divided into two independent but interconnected functional areas—overflow trough 101 and reaction tank 102—using an integrated casting process. This partitioned design fundamentally separates wastewater treatment from clean water diversion, avoiding cross-interference between clean and wastewater during treatment. Reaction tank 102, as the core treatment space of the entire filter, occupies most of the volume of tank 1. Internally, it contains a filter media layer, an arc-shaped filter plate 8, an impact assembly 3, and an inclined plate 34 arranged sequentially from top to bottom. It undertakes key tasks such as wastewater filtration, suspended solids removal, and biofilm denitrification. After wastewater enters, it is purified through the action of the filter plate 8 and filter media, making it the core area ensuring treatment effectiveness. The overflow trough 101 is located along one edge of tank 1, connected to the reaction tank. The overflow tanks 102 are adjacent to each other and connected by overflow holes 103. Their core function is to guide the orderly discharge of purified water. The inner wall of the overflow tank 101 is smoothed to avoid eddies or stagnation when the water flows, ensuring smooth drainage. The overflow holes 103 on the inner wall are evenly distributed in an array, and the hole size is precisely matched according to the design flow rate of the filter. This ensures that the water flows in quickly and prevents the filter media or suspended solids in the reaction tank 102 from entering the overflow tank 101 through the holes. When the purified water in the reaction tank 102 reaches the preset liquid level, it will flow into the overflow tank 101 at a uniform speed through the overflow holes 103, and then be discharged in a directional manner through the drain pipe 6 fixedly connected to the bottom of the overflow tank 101, and finally flow into the subsequent water treatment network or reuse system.

[0024] Liquid level sensor 4 and liquid level sensor 7 are respectively installed at key positions in reaction tank 102 and overflow tank 101. By monitoring liquid level changes in real time, they provide accurate signal support for system operation and flushing operations. Liquid level sensor 4 is a high-precision hydrostatic sensor, fixed in the upper middle part of the inner wall of reaction tank 102, used to monitor the flushing liquid level. Its monitoring range is precisely matched with the liquid level threshold during the filter flushing stage. The core function of this sensor is to link the start of the flushing system. When the filter completes the pretreatment of sewage discharge and enters the flushing state, the clear water pipe 12 is opened to... Water is injected into the reaction tank 102, and at the same time, the solenoid valve 14 is opened, allowing the solvent (such as sodium hypochlorite solution) in the storage tank 10 to flow in along with the water, forming a mixed rinsing solution. When the level of the mixed rinsing solution rises to the monitoring threshold of the level sensor 4, the sensor immediately sends an electrical signal to the external controller, triggering the motor 31 to start, driving the impact assembly 3 and the air blowing assembly 9 to operate synchronously, thus officially starting the rinsing process of the filter plate 8 and the filter media. In addition, the sensor can also provide real-time feedback on the rinsing solution level, preventing filter media loss due to excessively high levels or affecting the soaking effect due to excessively low levels.

[0025] Liquid level sensor 7 is installed in the middle area of ​​the inner wall of overflow tank 101 to monitor the rate of rise of clean water. It adopts non-contact ultrasonic sensing technology to avoid direct contact with sewage and prevent pollution or damage, ensuring long-term stable monitoring accuracy. Its core function is to monitor the rate of change of liquid level in overflow tank 101 during sewage treatment, thereby determining the filtration efficiency of filter plate 8. When the filter tank is operating normally, sewage continuously enters reaction tank 102 through inlet pipe 11. After being filtered by filter plate 8 and filter media, clean water flows into overflow tank 101 through overflow hole 103. At this time, the amount of sewage entering reaction tank 102 and the amount of filtered discharge form a dynamic balance, and the rate of rise of liquid level monitored by liquid level sensor 7 is stable at a preset value. Within the threshold range (which is determined by debugging and calibration based on parameters such as the effective volume of the filter bed, the design influent flow rate, and the filtration area), when the pores on the surface of the filter plate 8 become clogged due to excessive biofilm proliferation and saturation of suspended solids, the filtration flux will decrease significantly. Wastewater cannot pass through the filter plate 8 in time and wastewater will accumulate in the reaction tank 102. The rate of liquid level rise will slow down significantly or even stop. The amount of clean water flowing into the overflow tank 101 will also decrease simultaneously. The level sensor 7 continuously collects this abnormal data and compares it with the normal rate threshold built into the controller in real time. When the liquid level reaches the upper limit of the sensor's preset monitoring, a trigger signal is immediately sent to the external controller to start the subsequent sewage pretreatment process.

[0026] The tank body 1 is equipped with a storage tank 10, a sludge inlet pipe 11, a clean water pipe 12, a solenoid valve 14, and a drain pipe, forming a complementary and highly efficient auxiliary system that provides a stable guarantee for the continuous operation of the filter. The storage tank 10 is made of corrosion-resistant material and is fixed to the upper outer side of the tank body 1. It is used to store chemical solvents (such as sodium hypochlorite solution) for rinsing. The volume of the storage tank 10 is designed according to the amount of chemicals required for a single rinsing of the filter and is equipped with a liquid level observation window and a replenishment port to facilitate timely replenishment of chemicals by maintenance personnel. The storage tank 10 is fixedly connected to the sludge inlet pipe 11 through a dedicated pipeline. The solenoid valve 14 installed at the connection is a key control component for the flow of the medium, and its on / off state is entirely determined by the liquid level. Under the signal control of sensor 4, the solenoid valve 14 remains closed during normal filtration to prevent the chemicals from being lost or contaminating the wastewater. When the rinsing process is started, the solenoid valve 14 opens quickly after receiving the controller command. The chemicals in the storage tank 10 are fully mixed with the clean water injected into the clean water pipe 12 in the sewage inlet pipe 11 according to the preset ratio to form a mixed rinsing solution with uniform concentration. This solution is then precisely distributed to various areas of the reaction tank 102 through the diversion pipe 36 to provide sufficient medium for subsequent rinsing and soaking. The clean water pipe 12 at the other end of the tank 1 is made of high-strength PVC pipe and is equipped with a flow regulating valve. The clean water injection rate can be flexibly adjusted according to the rinsing requirements to ensure that the concentration of the mixed rinsing solution is stable and controllable.

[0027] A first drain pipe 2 and a second drain pipe 5 are arranged side-by-side at one end of the tank 1. Both drain pipes are equipped with electric actuators (such as electric ball valves) and are linked to an external controller to separate the sewage discharge needs under different operating conditions. The inlet end of the first drain pipe 2 is located in the lower area of ​​the reaction tank 102 and is specifically responsible for discharging untreated sewage from the reaction tank 102. When the level sensor 7 detects blockage of the filter plate 8 and sends a trigger signal, the electric valve of the first drain pipe 2 quickly responds and opens, while the inlet pipe 11 closes. The untreated sewage accumulated in the reaction tank 102 (containing high-concentration suspended solids, undegraded pollutants, aged biofilm, etc.) is discharged into the tank. Under the influence of gravity, the wastewater is discharged directionally through the first drain pipe 2 to the front-end equalization tank of the plant's wastewater treatment station, preventing these pollutants from further depositing and scaling on the surface of the filter plate 8, or diluting the rinsing liquid during subsequent rinsing to ensure the rinsing effect. The inlet end of the second drain pipe 5 is located at the bottom of the reaction tank 102, mainly used to discharge the waste liquid and detached impurities after rinsing. After rinsing is completed, the electric valve of the second drain pipe 5 is opened to quickly discharge the waste liquid containing detached biofilm, suspended solids and residual agents to avoid secondary pollution. The outlet ends of both drain pipes are equipped with check valves to prevent the discharged sewage or waste liquid from flowing back into the tank 1, ensuring that the sewage discharge process is safe and controllable.

[0028] Through precise layout design and intelligent linkage, the core structures and supporting components of the tank 1 achieve efficient collaboration throughout the entire process. During normal operation, wastewater enters the reaction tank 102 through the inlet pipe 11 and is purified by the action of the filter plates 8 and filter media. Clean water flows into the overflow tank 101 through the overflow hole 103 and is discharged through the drain pipe 6. When the filter plates 8 are blocked, the level sensor 7 triggers a signal, and the first drain pipe 2 opens to discharge untreated wastewater. After the discharge is completed, the clean water pipe 12 and the solenoid valve 14 work together to inject mixed flushing liquid into the reaction tank 102. The level sensor 4 triggers the flushing system to start, completing the cleaning of the filter plates 8 and filter media. The flushing waste liquid is discharged through the second drain pipe 5, and the filter tank returns to normal operation. This high degree of synergy between structure and function not only ensures the efficiency and quality of wastewater treatment but also realizes the automation and intelligence of the flushing process, significantly reducing operation and maintenance costs and improving the stability and reliability of the filter tank operation.

[0029] Reference Figures 3-8 Furthermore, the filter plate 8 is detachably connected to the reaction tank 102. The filter plate 8 is arc-shaped and located below the air blowing assembly 9. The air blowing assembly 9 includes a hollow cylinder 91 and an air inlet pipe 93. One end of the hollow cylinder 91 is rotatably connected to the inner wall of the air inlet pipe 93, and the air inlet pipe 93 is fixedly connected to the tank body 1. Several spirally distributed air blowing rods 92 are fixedly connected to the outer wall of the hollow cylinder 91. The air blowing rods 92 are arranged in a "V" shape. The inner wall of the air blowing rods 92 is provided with ventilation holes 94. The end of the hollow cylinder 91 away from the air inlet pipe 93 passes through the side wall of the tank body 1 and the support plate 13.

[0030] It should be noted that: the motor 31, as the core power source, is fixedly connected to one end of the hollow cylinder 91 located on the outside of the pool body 1. After starting, it directly drives the hollow cylinder 91 to rotate around its own axis. This power transmission method has no additional intermediate transmission loss, ensuring that the rotation speed of the hollow cylinder 91 is stable and controllable. While the hollow cylinder 91 is rotating, the air inlet pipe 93 simultaneously introduces compressed air into the hollow cylinder 91 (the gas pressure must match the weight of the filter material to avoid insufficient pressure preventing the filter material from turning or excessive pressure causing the filter material to be lost). The compressed air is evenly distributed to each air blowing rod 92 along the internal channel of the hollow cylinder 91, and finally injected directionally through the air vents 94 opened on the inner wall of the air blowing rod 92, forming a dual action mode of rotational motion plus gas injection, providing sufficient power for the agitation of the filter material.

[0031] The special "V"-shaped structure of the air-blowing rod 92 is a precise design to address the problem of bottom agitation of the filter media layer. It completely breaks through the limitations of traditional straight-line structures, which result in "sufficient surface agitation and insufficient bottom layer contact." The reasonable angle formed by the two rods allows the inner rod to penetrate deep into the bottom of the filter media layer when rotated by the hollow cylinder 91. Using rotational thrust, it hooks and disperses the bottom layer of filter media deposited on the surface of the filter plate 8, while the outer rod simultaneously pushes the middle layer of filter media outwards, creating a three-dimensional agitation trajectory of "bottom agitation and middle layer diffusion." This puts the originally statically accumulated filter media layer into a dynamic flow state, thoroughly eliminating the dead zones of bottom layer filter media deposition. Simultaneously... The filter plate 8 adopts an arc-shaped structure design, which works perfectly with the air blower 92. When the air blower 92 pushes the filter material to both sides, the curved surface of the arc-shaped filter plate 8 will generate a guiding force. With the guidance of gravity and the contact surface, the filter material that has spread to both sides will naturally converge towards the middle area, avoiding the filter material from adhering to the side wall of the reaction tank 102 and forming a dead corner. This combination design of the "V"-shaped air blower 92 flipping and the arc-shaped filter plate 8 converging ensures that the filter material can participate in the stirring and collision in a cycle. It not only ensures the comprehensiveness of the filter material flipping, but also avoids the local filter material being idle. It allows the impurities on the surface of the filter material to be efficiently peeled off in continuous collision, which greatly improves the cleaning effect of the subsequent rinsing process.

[0032] The vent 94 has a small inner diameter design. According to fluid mechanics principles, under constant inlet pressure, reducing the outlet cross-sectional area can significantly increase the gas jet velocity. After the high-speed jet of air is ejected from the vent 94, it will form local turbulence in the gaps between the filter media, impacting the suspended matter, aged biofilm and other impurities attached to the filter media surface, providing initial impurity removal. The high-speed airflow can also drive the filter media particles to produce irregular movement, causing frequent collisions and friction between adjacent filter media, which washes off stubborn impurities attached to the filter media surface through physical action, especially removing deep pollutants in the filter media pores. During the upward process, the airflow will also carry some of the detached fine impurities to float to the liquid surface, which can be discharged through the sewage system, reducing the probability of impurities re-attaching to the filter media surface.

[0033] The stirring process of the air blowing component 9 does not operate independently, but rather works synergistically with the rinsing and mixed liquid soaking of the impact component 3. During the stirring stage, most loose impurities are first removed through gas injection and particle collision, reducing the contaminant load of the subsequent rinsing liquid and allowing the rinsing liquid to act more precisely on the stubborn scale layer on the filter media surface. The "V"-shaped air blowing rod 92 drives the filter media to tumble up and down and gather left and right, changing the filter media layer from a dense state to a loose state. The rinsing liquid sprayed by the impact head 35 can penetrate into the filter media layer more evenly, avoiding the inability of the rinsing liquid to reach the deep filter media due to filter media accumulation. The airflow generated during the stirring process can also accelerate the gas-liquid exchange on the surface of the filter media, which helps the reaction between the solvent (such as sodium hypochlorite) in the subsequent mixed liquid and the biofilm on the surface of the filter media, improving the chemical cleaning effect. The entire working process achieves efficient stirring and impurity pretreatment of the filter media through precise matching of structural design and power transmission. This reduces the difficulty of subsequent rinsing and the consumption of reagents, protects the filter media from damage caused by severe impact, extends the service life of the filter media, and ultimately improves the overall rinsing quality and operational stability of the filter pool. Example

[0034] Reference Figures 3-7 , Figure 11 Furthermore, the impact assembly 3 includes a motor 31, a gear chain 32, and a drive gear disc 38. The motor 31 is fixedly connected to the support plate 13, and one end of the motor 31 is fixedly connected to the end of the hollow cylinder 91 located outside the tank body 1. The outer wall of the hollow cylinder 91 is fixedly connected to the drive gear disc 38, and the drive gear disc 38 is meshed with the gear chain 32. The impact assembly 3 also includes a rotating cylinder 33, an inclined plate 34, and a diversion pipe 36. The outer wall of the diversion pipe 36 is fixedly connected to one end of the sewage inlet pipe 11. Several rotating cylinders 33 are provided, and the several rotating cylinders 33 are linearly arrayed inside the reaction tank 102. One end of the rotating cylinder 33 is rotatably connected to the diversion pipe 36. The inclined plate 34 is fixedly connected to the inner wall of the reaction tank 102. 34 is located below the rotating cylinder 33; the end of the rotating cylinder 33 away from the diversion pipe 36 is rotatably connected to the inner wall of the reaction tank 102, the outer wall of the rotating cylinder 33 is fixedly connected to a gear 39, the gear 39 is meshed with a toothed chain 37, the outer wall of the rotating cylinder 33 is fixedly connected to a number of arrayed impact heads 35, the impact head 35 includes a connecting end 351 and a spray end 352, the spray end 352 is arranged in a duckbill shape; one end of one of the rotating cylinders 33 is fixedly connected to an extension column 311, the end of the extension column 311 away from the rotating cylinder 33 penetrates the side wall of the tank body 1, the outer wall of the extension column 311 is fixedly connected to a driven toothed disc 310, the driven toothed disc 310 and the driving toothed disc 38 are connected by a toothed chain 32.

[0035] It should be noted that: The level sensor 4, as the core triggering element for flushing initiation, not only links with the solenoid valve 14 to regulate the flushing medium supply, but also establishes an electrical linkage with the motor 31. When the level of the mixed flushing liquid (clean water and solvent in the storage tank 10) in the reaction tank 102 reaches the preset threshold of the level sensor 4, the sensor immediately sends a signal to the external controller to start flushing. The controller then instructs the motor 31 to start. The position of the level sensor 4 is lower than the impact head 35 below the rotating cylinder 33. After the motor 31 (the selection must match the filter specifications to ensure that the output torque meets the transmission requirements) starts, it directly drives the hollow cylinder fixedly connected to it through the output shaft. The 91 rotates, achieving lossless power transmission. At the same time, the active gear disk 38 fixed on the outer wall of the hollow cylinder 91 rotates synchronously. Through the meshing transmission of the first gear chain 32, it drives the driven gear disk 310 on the outer wall of the extension column 311 to rotate, thereby driving the extension column 311 to rotate. The extension column 311 is fixedly connected to one of the rotating cylinders 33. The gear 39 on the outer wall of the rotating cylinder 33 meshes with the gear 39 of other rotating cylinders 33 through the second gear chain 37, ultimately realizing a closed-loop transmission of synchronous rotation of the hollow cylinder 91 and multiple rotating cylinders 33, ensuring that the impact assembly 3 and the air blowing assembly 9 operate precisely and synchronously under the drive of the same power source.

[0036] While the motor 31 starts, the solenoid valve 14 remains open. The solvent (such as sodium hypochlorite solution) in the storage tank 10 and the clean water injected through the clean water pipe 12 continue to mix thoroughly in the inlet pipe 11 and the diversion pipe 36, forming a uniformly concentrated mixed flushing solution. The diversion pipe 36 is rotatably connected to multiple rotating cylinders 33. The mixed flushing solution is evenly distributed into the interior of each rotating cylinder 33 through the diversion pipe 36, and then directionally sprayed out by the impact heads 35 arrayed on the outer wall of the rotating cylinder 33. The spray end 352 of the impact head 35 adopts a duckbill-shaped design, which can aspirate the mixed solution into the air. The pressure of the flushing liquid is concentrated to form a high-pressure jet (the jet pressure is adapted according to the degree of clogging of the filter plate 8). During the synchronous rotation of the rotating cylinder 33, the high-pressure jet will thoroughly flush the bottom of the reaction tank 102 and the lower end of the filter plate 8 without dead angles. On the one hand, the impact force of the jet can directly peel off the deposited sludge attached to the bottom of the tank and the stubborn biofilm on the lower end of the filter plate 8; on the other hand, the annular flushing trajectory formed by the rotating jet can cover the entire lower surface of the filter plate 8, avoiding flushing dead angles and achieving a preliminary cleaning effect, laying the foundation for subsequent chemical soaking.

[0037] While the impact component 3 is performing high-pressure flushing, the air blowing component 9, which is fixedly connected to the hollow cylinder 91, operates synchronously. The air inlet pipe 93 continuously introduces compressed air into the hollow cylinder 91. The air is distributed through the hollow cylinder 91 to each spirally distributed "V"-shaped air blowing rod 92, and then ejected at high speed through the small-diameter air vents 94 on the inner wall of the air blowing rod 92. The high-speed airflow not only promotes the friction between filter media particles and removes impurities attached to the surface, but also forms a large number of microbubbles in the mixed flushing liquid. As the bubbles rise, they disturb the liquid, allowing the mixed flushing liquid to penetrate more evenly into the gaps between the filter media, allowing the solvent to fully contact the biofilm and improve the efficiency of the chemical reaction.

[0038] As the mixed flushing liquid is continuously replenished and the impact head 35 sprays, the liquid level in the reaction tank 102 gradually rises. When the liquid level surpasses the duckbill-shaped spray end 352 of the impact head 35, the scouring effect of the high-pressure jet naturally terminates. At this point, the core function of the impact component 3 changes from "mechanical scouring" to "auxiliary stirring." The continuous rotation of the rotating cylinder 33 drives the surrounding liquid to form a circulation, further promoting the uniform distribution of the mixed flushing liquid. After the liquid level continues to rise until it completely submerges the filter plate 8 and the filter media layer, the chemical soaking stage begins. The solvent in the mixed flushing liquid (such as sodium hypochlorite) has fully penetrated into the pores of the filter plate 8, the gaps between the filter media, and the interior of the biofilm under the previous scouring and stirring action. Through oxidation, it destroys the bacterial floc structure of the biofilm, kills microorganisms, and decomposes their cell walls, achieving thorough biofilm removal. During the continuous stirring process of the air blowing component 9, uneven local concentration of the mixed rinsing solution can be avoided. At the same time, it prevents the detached biofilm and impurities from re-attaching to the filter plate 8 or filter media surface, ensuring the consistency and thoroughness of the soaking effect. The entire working process, through the design of power linkage, media coordination and stage transition, organically combines the physical stripping effect of mechanical flushing with the deep cleaning effect of chemical soaking. This not only improves the removal efficiency of biofilm and impurities, but also reduces the consumption of rinsing media, extends the service life of filter plate 8 and filter media, and ensures that the filter pool can quickly restore the filtration and denitrification denitrification efficiency. The inclined plate 34 is set at an angle, which can guide the detached impurities flushed by the impact head 35 to converge to the bottom of the reaction tank 102, which is convenient for centralized discharge by the second drain pipe 5 and avoids the deposition of impurities at the bottom of the tank.

[0039] It should be noted that the specific model and specifications of the motor need to be selected and determined based on the actual specifications of the device. The specific selection and calculation method adopts the existing technology in this field, so it will not be described in detail here.

[0040] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the invention by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. A denitrification deep bed filter device, comprising a tank body (1), wherein the tank body (1) is connected to a first drain pipe (2) and a second drain pipe (5), and an inlet pipe (11) is provided inside the tank body (1), wherein the inlet pipe (11) is connected to a clean water pipe (12), characterized in that, The pool body (1) is connected to a filter plate (8) and a liquid storage tank (10), and the pool body (1) is connected to a liquid level sensor one (4) and a liquid level sensor two (7), and also includes: Impact assembly (3), which is located inside the pool body (1), is used for rinsing the filter plate (8); An air blowing assembly (9) is located inside the pool body (1) and is used to agitate the filter media.

2. The denitrification deep bed filter device according to claim 1, characterized in that, The interior of the pool (1) is provided with an overflow trough (101) and a reaction tank (102). The inner wall of the overflow trough (101) is provided with an overflow hole (103). The inner wall of the overflow trough (101) is fixedly connected to a liquid level sensor (4). The inner wall of the reaction tank (102) is fixedly connected to a liquid level sensor (7). The overflow trough (101) is fixedly connected to a drain pipe (6).

3. The denitrification deep bed filter device according to claim 2, characterized in that, The filter plate (8) is detachably connected to the reaction tank (102), the filter plate (8) is arc-shaped, and the filter plate (8) is located below the air blowing assembly (9).

4. The denitrification deep bed filter device according to claim 1, characterized in that, The pool body (1) is fixedly connected to the liquid storage tank (10) and the sewage inlet pipe (11) respectively. The liquid storage tank (10) and the sewage inlet pipe (11) are fixedly connected. A solenoid valve (14) is provided at the connection between the liquid storage tank (10) and the sewage inlet pipe (11). A first sewage pipe (2) and a second sewage pipe (5) are provided at one end of the pool body (1). A support plate (13) is fixedly connected to the side wall of the pool body (1).

5. The denitrification deep bed filter device according to claim 4, characterized in that, The air blowing assembly (9) includes a hollow cylinder (91) and an air inlet pipe (93). One end of the hollow cylinder (91) is rotatably connected to the inner wall of the air inlet pipe (93), and the air inlet pipe (93) is fixedly connected to the pool body (1).

6. The denitrification deep bed filter device according to claim 5, characterized in that, The outer wall of the hollow cylinder (91) is fixedly connected with several spirally distributed air blowing rods (92). The air blowing rods (92) are arranged in a "V" shape. The inner wall of the air blowing rods (92) is provided with air vents (94). The end of the hollow cylinder (91) away from the air inlet pipe (93) passes through the side wall of the pool body (1) and the support plate (13).

7. The denitrification deep bed filter device according to claim 6, characterized in that, The impact assembly (3) includes a motor (31), a toothed chain (32), and an active toothed disc (38). The motor (31) is fixedly connected to the support plate (13). One end of the motor (31) is fixedly connected to the end of the hollow cylinder (91) located outside the pool body (1). The outer wall of the hollow cylinder (91) is fixedly connected to the active toothed disc (38). The active toothed disc (38) is meshed with the toothed chain (32).

8. The denitrification deep bed filter device according to claim 7, characterized in that, The impact assembly (3) further includes a rotating cylinder (33), an inclined plate (34), and a diversion pipe (36). The outer wall of the diversion pipe (36) is fixedly connected to one end of the sewage inlet pipe (11). There are several rotating cylinders (33), which are linearly arrayed inside the reaction tank (102). One end of the rotating cylinder (33) is rotatably connected to the diversion pipe (36). The inclined plate (34) is fixedly connected to the inner wall of the reaction tank (102), and the inclined plate (34) is located below the rotating cylinder (33).

9. A denitrification deep bed filter device according to claim 8, characterized in that, The end of the rotating cylinder (33) away from the diversion pipe (36) is rotatably connected to the inner wall of the reaction tank (102). A gear (39) is fixedly connected to the outer wall of the rotating cylinder (33). The gear (39) meshes with a toothed chain (37). Several arrayed impact heads (35) are fixedly connected to the outer wall of the rotating cylinder (33). The impact head (35) includes a connecting end (351) and a spraying end (352). The spraying end (352) is arranged in a duckbill shape.

10. A denitrification deep bed filter device according to claim 9, characterized in that, One end of one of the rotating cylinders (33) is fixedly connected to an extension column (311). The end of the extension column (311) away from the rotating cylinder (33) passes through the side wall of the pool body (1). The outer wall of the extension column (311) is fixedly connected to a driven gear disc (310). The driven gear disc (310) and the driving gear disc (38) are connected by a gear chain (32).

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