Sewage deodorization device and method for bio-trickling filter

Abstract

The invention discloses a bio-trickling filter sewage deodorization device and method, and relates to the technical field of sewage treatment.The bio-trickling filter sewage deodorization device is provided with a reciprocating lead screw shaft and a reciprocating lead screw sleeve which are matched with each other, so that a bearing plate of a spiral structure can be driven to be compressed and stretched cyclically, microbial carriers can be extruded in the compression process, and the microbial carriers are prevented from being damaged. According to the present invention, the stretching layer can be stretched and dispersed during the stretching process, such that the impurities and the aged biological membrane attached on the microbial carrier can be effectively stripped, and the flow channel shaping and the channeling can be prevented to a certain extent so as to significantly reduce the risk of the microbial carrier blocking during the sewage deodorization process; the gas phase and the liquid phase can fully contact and react with microorganisms in a long-acting and stable manner, so that the efficiency and the stability of deodorization treatment in the sewage purification process are effectively improved.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a biological trickling filter wastewater deodorization device and method. Background Technology

[0002] In existing technologies, when using bio-trickling filters to deodorize wastewater, the functional microbial community on the surface of the microbial carrier degrades pollutants such as hydrogen sulfide, ammonia nitrogen, and volatile organic compounds in the wastewater into harmless substances, thereby achieving the purification of wastewater odor.

[0003] Existing bio-trickling filters typically employ a fixed installation method for their microbial carriers. These carriers are layered within the filter, their positions relatively fixed, and their pore structure relatively stable. However, during actual operation, as time progresses, microbial metabolic products, suspended particulate matter in the wastewater, and excess biofilm produced by the microorganisms themselves gradually deposit and adhere to the surface and pores of the carrier. Because the carrier is fixed, these deposits accumulate, causing pore blockage and increasing the resistance to gas and liquid flow within the filter. This prevents harmful substances in the wastewater from reaching the microbial community within the carrier, severely impacting the deodorization efficiency of the bio-trickling filter.

[0004] Therefore, a biological trickling filter wastewater deodorization device and method are proposed to solve some of the problems existing in the above-mentioned prior art. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies, such as the fixed structure of microbial carriers in bio-trickling filters, which easily leads to clogging during long-term operation and affects the deodorization effect of wastewater. Therefore, this invention proposes a bio-trickling filter wastewater deodorization device and method.

[0006] To address the problems existing in the prior art, the present invention adopts the following technical solution: A biological trickling filter wastewater deodorization device includes an outer tower body, an inner tower body fixedly installed inside the outer tower body, an inlet connected to the inner tower body fixedly installed at the lower part of the outer end wall of the outer tower body, a spray pipe fixedly installed at the upper part of the inner tower body, a pump assembly fixedly installed on one side of the bottom of the outer tower body, a biological reaction mechanism installed inside the inner tower body, and the biological reaction mechanism includes a bearing fixedly installed at the middle position of the spray pipe, a bracket fixedly installed above the inlet inside the inner tower body, a vertically arranged shaft rotatably installed between the bearing bearing and the bracket, a reciprocating screw shaft fixedly installed on the shaft, a reciprocating screw sleeve meshing with the reciprocating screw shaft, a first crossbar installed on the reciprocating screw sleeve, a second crossbar installed on the bracket, a bearing plate spirally sleeved on the outside of the shaft fixedly connected between the first crossbar and the second crossbar, and a first through hole evenly distributed on the bearing plate, a microbial carrier fixedly covered on the top of the bearing plate, and a microbial colony loaded in the microbial carrier, and a drive mechanism for driving the shaft to rotate installed at the bottom of the inner tower body.

[0007] Preferably, the spray pipe is fixedly connected to multiple evenly distributed branch pipes, and the inner diameter of the branch pipes gradually decreases from the spray pipe outwards. Multiple evenly distributed nozzles are fixedly installed at the bottom of the branch pipes.

[0008] Preferably, an annular cavity is formed between the outer tower body and the inner tower body, and both ends of the spray pipe are connected to the upper part of the annular cavity. A guide vane is fixedly installed inside the annular cavity, and the guide vane is configured as a spiral structure. The water outlet of the pump assembly is connected to the lower part of the annular cavity.

[0009] Preferably, the first crossbar is rotatably connected to the reciprocating lead screw sleeve, and the second crossbar is rotatably connected to the bracket.

[0010] Preferably, a cylinder sleeved on the outside of the shaft is fixedly installed on the bracket, and a ring plate is slidably installed inside the cylinder. A connecting rod arranged parallel to the shaft is fixedly connected between the reciprocating screw sleeve and the ring plate, and the connecting rod is slidably connected to the top of the cylinder.

[0011] Preferably, the bottom of the support plate is fixedly covered with a rubber layer, and the rubber layer has a second through hole corresponding to a plurality of first through holes, and an airbag is installed in the second through hole.

[0012] Preferably, the outer dimensions of the ring plate are adapted to the inner dimensions of the cylinder, and a piston chamber is provided inside the cylinder above the ring plate. The bottom of the piston chamber is connected to the interior of multiple air bladders, and the air bladders and piston chamber are filled with liquid medium.

[0013] Preferably, the drive mechanism includes a vortex chamber, and the top of the vortex chamber is provided with multiple water inlets communicating with the bottom of the inner tower body. The side of the vortex chamber is provided with a water outlet communicating with the water pumping end of the pumping assembly. Fan blades are rotatably installed in the vortex chamber between the water inlets and the water outlets, and the lower end of the shaft is fixedly connected to the axis of the fan blades.

[0014] Preferably, a ratchet mechanism is provided on the outer side of the lower end of the shaft, and the ratchet mechanism includes a housing fixedly installed on the top of the turbofan chamber, a ratchet body rotatably installed on the outer side of the lower end of the shaft, a pawl adapted to the ratchet body rotatably installed in the housing, and a spring for elastically supporting the pawl installed in the housing.

[0015] Preferably, a method for deodorizing wastewater using a bio-trickling filter is provided. This method is applicable to bio-trickling filter wastewater deodorization devices and includes the following steps: S1. The odorous wastewater to be treated is continuously fed into the bottom of the inner tower through the feed inlet; S2. The sewage at the bottom of the inner tower is pumped to the bottom of the annular cavity by the pump assembly. Under the guidance of the guide vanes, the sewage rises steadily to the top of the annular cavity and then enters the spray pipe evenly. It is then sprayed downwards in the form of fine water flow from the evenly distributed nozzles through the diversion pipe. S3. The odorous gas in the sewage at the bottom of the inner tower flows upward and comes into countercurrent contact with the sewage sprayed downward in S2, and performs preliminary gas phase mass transfer and water phase absorption. S4. When the sewage at the bottom of the inner tower is pumped, it enters through the inlet of the vortex chamber, impacts the fan blades, and drives the shaft to rotate in one direction under the restriction of the ratchet mechanism. S5. The unidirectional rotating shaft drives the reciprocating lead screw shaft to rotate, forcing the meshing reciprocating lead screw sleeve to drive the spiral bearing plate and the microbial carrier on it to perform axial reciprocating compression and stretching motion, peeling off the attachments on the surface of the microbial carrier and extending the gas-liquid contact path. S6. When the support plate is stretched, the connecting rod drives the ring plate to move up, compressing the piston chamber and forcing the liquid medium into the air bladder, causing it to expand and reduce the opening of the first through hole at the bottom of the microbial carrier, promoting the retention and deep reaction of sewage inside the microbial carrier. When the support plate is compressed, it drives the ring plate to move down, increasing the piston chamber, causing the air bladder to contract and increasing the opening of the first through hole, which facilitates the smooth discharge of the sewage after the reaction. S7. The water that has been fully purified by microbial degradation is discharged as treated effluent, and the purified gas in the wastewater is discharged from the top of the inner tower.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, by setting up a reciprocating screw shaft and a reciprocating screw sleeve to cooperate with each other, the spiral structure of the bearing plate can be driven to cyclically compress and stretch. During the compression process, the microbial carrier can be squeezed and during the stretching process, it can be extended and dispersed. This can effectively peel off the impurities and aging biofilm attached to the microbial carrier, and to a certain extent prevent the formation of flow channel and channeling. This significantly reduces the risk of microbial carrier blockage during sewage deodorization, and allows the gas and liquid phases to have long-term stable and sufficient contact and reaction with microorganisms, effectively improving the efficiency and stability of deodorization treatment during sewage purification. 2. In this invention, by installing the airbag in the second through hole opened on the rubber layer and connecting the airbag to the piston chamber, the bearing plate can synchronously drive the airbag to periodically expand and contract during the stretching and compression process, thereby intelligently adjusting the opening of the first through hole on the bearing plate. By reducing the opening during the stretching stage, the sewage can be promoted to remain and react deeply in the microbial carrier, while the opening can be expanded during the compression stage to facilitate the smooth discharge of the purified sewage. This effectively realizes the autonomous optimization and control of the reaction and drainage process of the device. 3. In this invention, by connecting the turbine chamber between the inner tower body and the pump assembly, the fluid kinetic energy during the sewage circulation spraying process can be used to impact the rotation of the fan blades, providing power for the bearing plate to drive the microbial carrier to reciprocate compression and extension. No external motor or other power source is required, which can effectively reduce the manufacturing and operating costs of the device. At the same time, by setting a ratchet mechanism to ensure the unidirectional and irreversible movement of the shaft, the stability of the device driven by the shaft rotation to compress the bearing plate can be effectively guaranteed. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a three-dimensional view of the bioreaction mechanism of the present invention; Figure 2 This is a perspective view of the present invention; Figure 3 This is a top view of the present invention; Figure 4 For the present invention Figure 3 Sectional view at point AA; Figure 5 For the present invention Figure 4 Enlarged view of point C in the middle; Figure 6 For the present invention Figure 3 Sectional view at point BB; Figure 7 This is a front view of the present invention; Figure 8 For the present invention Figure 7 Sectional view at point DD; Figure 9 This is a perspective view of the spray pipe, annular cavity, and guide vanes of the present invention; Figure 10 For the present invention Figure 1 A breakdown diagram of the middle structure; Figure 11 For the present invention Figure 10 Enlarged view at point E in the middle; Figure 12 This is an exploded view of the internal structure of the housing of the present invention.

[0018] In the picture: 1. Outer tower body; 11. Inner tower body; 12. Feed inlet; 13. Spray pipe; 14. Diverter pipe; 15. Spray nozzle; 16. Pump assembly; 17. Annular cavity; 18. Guide vane; 2. Shaft seat; 21. Bracket; 22. Shaft; 23. Reciprocating lead screw shaft; 24. Reciprocating lead screw sleeve; 25. First crossbar; 26. Second crossbar; 27. Bearing plate; 28. First through hole; 29. ​​Microbial carrier; 3. Cylinder body; 31. Ring plate; 32. Connecting rod; 4. Rubber layer; 41. Second through hole; 42. Airbag; 43. Piston chamber; 5. Turbofan chamber; 51. Inlet; 52. Outlet; 53. Fan blades; 6. Housing; 61. Ratchet body; 62. Pad; 63. Spring. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] Example: This example provides a biological trickling filter wastewater deodorization device, see [link to example]. Figure 1 - Figure 12 Specifically, it includes an outer tower body 1, an inner tower body 11 fixedly installed inside the outer tower body 1, a feed inlet 12 connected to the inner tower body 11 fixedly installed at the lower position of the outer end wall of the outer tower body 1, a spray pipe 13 fixedly installed at the upper position inside the inner tower body 11, a plurality of evenly distributed diversion pipes 14 fixedly connected to the spray pipe 13, and the inner diameter of the diversion pipes 14 gradually decreases from the spray pipe 13 outwards, a plurality of evenly distributed nozzles 15 fixedly installed at the bottom of the diversion pipes 14, and a water pump assembly 16 fixedly installed on one side of the bottom of the outer tower body 1.

[0021] Wastewater is transported to the bottom of the inner tower 11 through the inlet 12. Then, the pump assembly 16 is powered on and continuously pumps the wastewater at the bottom of the inner tower 11 into the spray pipe 13. The wastewater is distributed into each branch pipe 14 in the spray pipe 13. Since the branch pipe 14 is designed with a tapered structure, it can effectively reduce the insufficient pressure of the wastewater sprayed from the nozzle 15 at the end of the branch pipe 14, so that the wastewater can be sprayed downward evenly and finely to form a stable water distribution layer.

[0022] A bioreactor is installed inside the inner tower body 11. The bioreactor includes a bearing 2 fixedly installed in the middle of the spray pipe 13. A bracket 21 is fixedly installed above the feed inlet 12 inside the inner tower body 11. A vertically arranged shaft 22 is rotatably installed between the bearing 2 and the bracket 21. A reciprocating screw shaft 23 is fixedly installed on the shaft 22. A reciprocating screw sleeve 24 is meshed on the reciprocating screw shaft 23. A first crossbar 25 is installed on the reciprocating screw sleeve 24. A second crossbar 26 is installed on the bracket 21. A bearing plate 27, which is spirally sleeved on the outside of the shaft 22, is fixedly connected between the first crossbar 25 and the second crossbar 26. The bearing plate 27 has evenly distributed first through holes 28. A microbial carrier 29 is fixedly covered on the top of the bearing plate 27. The microbial carrier 29 contains microbial flora. A drive mechanism for driving the shaft 22 to rotate is installed at the bottom of the inner tower body 11.

[0023] Wastewater is sprayed onto the entire surface of the microbial carrier 29, coming into contact with the microbial community inside the carrier 29. The microbial community decomposes harmful substances in the wastewater, achieving purification and deodorization. During this process, the drive mechanism provides power to the bioreactor, causing the shaft 22 to rotate. The shaft 22 then drives the reciprocating lead screw shaft 23 to rotate synchronously. Through the threaded engagement between the reciprocating lead screw shaft 23 and the reciprocating lead screw sleeve 24, the rotational motion of the reciprocating lead screw shaft 23 is converted into the reciprocating lifting motion of the reciprocating lead screw sleeve 24 along the axial direction of the shaft 22. The bearing plate 27 can be made of thin stainless steel sheet, possessing strong elastic deformation. The microbial carrier 29 is preferably a porous elastomer filler with surface hydrophilic modification, such as open-cell polyurethane foam, rubber-based porous composite material, etc. It has a high specific surface area, good biocompatibility, and elasticity that matches the movement of the support plate 27. Since the support plate 27 is set as a spiral structure, and the upper end of the support plate 27 is fixedly connected to the first crossbar 25 and the lower end of the support plate 27 is fixedly connected to the second crossbar 26, the reciprocating lifting and lowering motion of the reciprocating screw sleeve 24 can intermittently compress and stretch the entire support plate 27, thereby allowing the microbial carrier 29 covering the support plate 27 to undergo periodic axial compression and extension.

[0024] During this process, the spiral-shaped support plate 27 not only provides a stable and ductile support for the microbial carrier 29, but also effectively increases the area of ​​the microbial carrier 29 installed inside the inner tower body 11. During compression, the microbial carrier 29 on the support plate 27 can be squeezed, and during extension, the microbial carrier 29 on the support plate 27 can be released and dispersed. Under the reciprocating action, the impurities and aging biofilm attached to the microbial carrier 29 can be effectively peeled off. Combined with the flushing formed by the sewage spray flow, the probability of the microbial carrier 29 being blocked during the sewage deodorization process can be effectively reduced.

[0025] Furthermore, during the stretching process, the expansion of the microbial carrier 29 allows sewage to more easily penetrate deep into the interior of the microbial carrier 29. During the compression process, the sewage that has already reacted inside the microbial carrier 29 can be squeezed out more efficiently, thereby effectively improving the efficiency of sewage purification and deodorization by microorganisms.

[0026] In this device, by setting the support plate 27 as a spiral structure that spirals upward, the path length that the odor inside the sewage needs to pass through when rising in the inner tower 11 can be significantly extended, effectively increasing the contact time and contact area between the odor and the attached microorganisms and water film, thereby effectively improving the mass transfer efficiency and purification effect of the odor inside the sewage in this device.

[0027] In the specific implementation process, such as Figure 4 , Figure 6 , Figure 8 and Figure 9 As shown, an annular cavity 17 is formed between the outer tower body 1 and the inner tower body 11. The two ends of the spray pipe 13 are connected to the upper part of the annular cavity 17. A guide vane 18 is fixedly installed inside the annular cavity 17, and the guide vane 18 is set as a spiral structure. The outlet end of the pump assembly 16 is connected to the lower part of the annular cavity 17. In this device, the annular cavity 17 can be used as a channel for sewage lifting. The sewage is pumped into the bottom of the annular cavity 17 by the pump assembly 16. Then, the sewage flows from bottom to top in the annular cavity 17 under pressure. The spiral guide vane 18 fixed in the annular cavity 17 guides the rising water flow, so that the sewage rises smoothly along the spiral path. This can effectively eliminate the turbulence, uneven distribution and impact on the structure caused by the direct rush of sewage. It can ensure that the sewage fills the cross-section of the annular cavity 17 smoothly and evenly, so that when the sewage rises to the top, it can enter the spray pipe 13 evenly, laying the foundation for subsequent uniform water distribution.

[0028] In the specific implementation process, such as Figure 1 , Figure 6 and Figure 10As shown, the first crossbar 25 is rotatably connected to the reciprocating lead screw sleeve 24, and the second crossbar 26 is rotatably connected to the bracket 21. The first crossbar 25 forms a rotating pair with the reciprocating lead screw sleeve 24 through a bearing or bushing, allowing relative rotation between the two. Similarly, the second crossbar 26 is also connected to the bracket 21 through a rotating pair. This allows the first crossbar 25 and the second crossbar 26 to rotate appropriately when the reciprocating lead screw sleeve 24 performs helical motion on the reciprocating lead screw shaft 23, reciprocating to compress and stretch the bearing plate 27. While providing stable radial support for the upper and lower ends of the bearing plate 27, it also allows the upper and lower ends of the bearing plate 27 to undergo necessary angular deflection around this connection point during the movement to adapt to its compression and stretching deformation, avoiding the forced transmission of rotational torque to the bearing plate 27. This effectively ensures that the bearing plate 27 can smoothly complete the set compression and stretching movements under the drive, and to a certain extent guarantees the stability of the device during operation.

[0029] In the specific implementation process, such as Figure 1 , Figure 4 , Figure 6 and Figure 10 As shown, a cylinder 3 is fixedly installed on the bracket 21 and sleeved on the outside of the shaft 22. A ring plate 31 is slidably installed inside the cylinder 3. A connecting rod 32, which is parallel to the shaft 22, is fixedly connected between the reciprocating screw sleeve 24 and the ring plate 31. The connecting rod 32 is slidably connected to the top of the cylinder 3. During the operation of the device, the movement of the reciprocating screw sleeve 24 can be restricted through the sliding connection between the cylinder 3 and the connecting rod 32, so that the reciprocating screw sleeve 24 can only move up and down axially and cannot rotate radially. Thus, the reciprocating screw shaft 23 can stably drive the reciprocating screw sleeve 24 to move up and down reciprocally during the rotation.

[0030] The bottom of the support plate 27 is fixedly covered with a rubber layer 4, and the rubber layer 4 has a second through hole 41 corresponding to a plurality of first through holes 28. An air bag 42 is installed in the second through hole 41. The outer dimensions of the ring plate 31 are adapted to the inner dimensions of the cylinder 3. A piston chamber 43 is provided in the cylinder 3 above the ring plate 31, and the bottom of the piston chamber 43 is connected to the interior of a plurality of air bags 42. The air bags 42 and the piston chamber 43 are filled with liquid medium.

[0031] In this device, the liquid medium can be purified water. The cylinder 3, ring plate 31, connecting rod 32, piston chamber 43, air bladder 42 and liquid medium can form a closed-loop hydraulic control structure, which is used to automatically adjust the effective opening of the first through hole 28 and the second through hole 41 according to the operating status, thereby effectively optimizing the reaction and discharge cycle of sewage in the microbial carrier 29.

[0032] When the reciprocating screw sleeve 24 is driven to move upward, the bearing plate 27 is axially stretched. Through the connecting rod 32, the ring plate 31 is driven to slide upward synchronously in the cylinder 3. This can drive the ring plate 31 to compress the volume of the piston chamber 43 above it, forcing the liquid medium in the chamber to be pushed into each air bladder 42 through the connecting pipe. This causes the air bladder 42 to expand under hydraulic pressure, and its outer wall expands towards the inner wall of the second through hole 41 and the corresponding first through hole 28, thereby significantly reducing the actual flow opening of the first through hole 28. In this state, in conjunction with the unfolding of the microbial carrier 29 during the stretching process, the sprayed sewage from top to bottom is more easily intercepted and fully soaked and penetrated into the microbial carrier 29, which can effectively prolong the contact reaction time between harmful substances and microbial flora, and effectively enhance the purification and decomposition process.

[0033] Conversely, when the reciprocating screw sleeve 24 moves downward, the bearing plate 27 is axially compressed, causing the ring plate 31 to slide downward, increasing the volume of the piston chamber 43 and creating a negative pressure. This draws back the liquid medium inside the air bladder 42, causing the air bladder 42 to contract. This increases the flow opening of the first through hole 28. In this state, combined with the compression of the microbial carrier 29, the wastewater that has completed the reaction inside the microbial carrier 29 can be smoothly discharged. This achieves timely removal of reaction products and hydraulic renewal inside the carrier, making it easier to prepare for the next reaction cycle efficiently and effectively improving the microbial purification effect of the device on wastewater.

[0034] In the specific implementation process, such as Figure 4 , Figure 6 , Figure 8 and Figure 12 As shown, the drive mechanism includes a turbine chamber 5, and the top of the turbine chamber 5 is provided with multiple water inlets 51 connected to the bottom of the inner tower 11. The side of the turbine chamber 5 is provided with an outlet 52 connected to the water pumping end of the pump assembly 16. The turbine chamber 5 is rotatably installed with fan blades 53 between the water inlets 51 and the outlets 52. The lower end of the shaft 22 is fixedly connected to the axis of the fan blades 53. In this device, when the pump assembly 16 pumps the sewage from the bottom of the inner tower 11 to the upper spray, the pumping flow of the sewage will act on the fan blades 53, generating a rotational torque, which drives the shaft 22 connected to the fan blades 53 to rotate, thereby converting part of the kinetic energy of the water flow into mechanical energy to drive the reciprocating motion of the bioreactor. This makes the device not require an external motor, which is beneficial for energy conservation and environmental protection.

[0035] In the specific implementation process, such as Figure 4 , Figure 6 , Figure 8 and Figure 12As shown, a ratchet mechanism is provided on the outer side of the lower end of the shaft 22. The ratchet mechanism includes a housing 6 fixedly installed on the top of the turbine chamber 5. A ratchet body 61 is fixedly installed on the outer side of the lower end of the shaft 22 and rotatably disposed within the housing 6. A pawl 62 adapted to the ratchet body 61 is rotatably installed within the housing 6. A spring 63 is installed within the housing 6 to elastically support the pawl 62. In this device, the ratchet mechanism serves as a unidirectional transmission and anti-reverse structure, ensuring the reliability of the internal bioreactor mechanism during operation. The ratchet body 61 rotates synchronously with the shaft 22. When the water flow impacts the fan blade 53 and drives the shaft 22 to rotate continuously in the designed direction, the pawl 62 slides on the tooth surface of the ratchet body 61 and passes over the tooth tip. Under the elasticity of the spring 63, the pawl 62... The shaft 22 falls into the next tooth groove under the action of water flow fluctuations or other reasons. This process has very little rotational resistance, allowing the shaft 22 to rotate freely in the forward direction. If the shaft 22 has a tendency to rotate in the reverse direction due to water flow fluctuations or other reasons, the pawl 62 will lock the back of the teeth of the ratchet body 61 to prevent it from reversing. Through this unidirectional transmission characteristic, it can be ensured that the shaft 22 can only be driven to rotate in the preset direction. This makes the power transmission direction unique and certain when the drive mechanism drives the bearing plate 27 to complete the compression and stretching cycle. Especially when it is necessary to overcome resistance to perform the compression stroke, the motion transmission is smoother, more efficient and without backlash. It can avoid motion mismatch and energy loss caused by reverse rotation or jamming, thereby effectively ensuring the stability of the entire device's operating rhythm and the accuracy of the control process.

[0036] In specific implementation, a method for deodorizing wastewater using a biological trickling filter is provided. This method is applicable to the aforementioned biological trickling filter wastewater deodorization device and includes the following steps: S1. The odorous wastewater to be treated is continuously fed into the bottom of the inner tower body 11 through the feed inlet 12; S2. The sewage at the bottom of the inner tower 11 is pumped to the bottom of the annular cavity 17 by the pumping assembly 16. Under the guidance of the guide vane 18, the sewage rises steadily to the top of the annular cavity 17 and then enters the spray pipe 13 evenly. It is then sprayed downwards in the form of fine water flow from the evenly distributed nozzles 15 through the diversion pipe 14. S3. The odorous gas in the sewage at the bottom of the inner tower 11 flows upward and comes into countercurrent contact with the sewage sprayed downward in S2, and performs preliminary gas phase mass transfer and water phase absorption. S4. When the sewage at the bottom of the inner tower body 11 is pumped, it enters through the inlet 51 of the turbine chamber 5, impacts the fan blades 53, and drives the shaft rod 22 to rotate in one direction under the restriction of the ratchet mechanism. S5. The unidirectional rotating shaft 22 drives the reciprocating lead screw shaft 23 to rotate, which forces the meshing reciprocating lead screw sleeve 24 to drive the spiral bearing plate 27 and the microbial carrier 29 on it to perform axial reciprocating compression and stretching motion, peel off the attachments on the surface of the microbial carrier 29, and extend the gas-liquid contact path. S6. When the support plate 27 is stretched, the connecting rod 32 drives the ring plate 31 to move upward, compressing the piston chamber 43 and forcing the liquid medium into the air bag 42, causing it to expand and reduce the opening of the first through hole 28 at the bottom of the microbial carrier 29, promoting the retention and deep reaction of sewage inside the microbial carrier 29. When the support plate 27 is compressed, it drives the ring plate 31 to move downward, increasing the piston chamber 43, causing the air bag 42 to contract and increasing the opening of the first through hole 28, which facilitates the smooth discharge of the sewage after the reaction. S7. The water that has been fully purified by microbial degradation is discharged as treated effluent, and the purified gas in the wastewater is discharged from the top of the inner tower 11.

[0037] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A biological trickling filter tower sewage deodorization device, comprising an outer tower body (1), characterized in that: The outer tower body (1) is fixedly installed with an inner tower body (11), the lower position of the outer end wall of the outer tower body (1) is fixedly installed with a feeding port (12), the upper position in the inner tower body (11) is fixedly installed with a spraying pipe (13), the bottom side of the outer tower body (1) is fixedly installed with a pump water assembly (16), a biological reaction mechanism is installed in the inner tower body (11), and the biological reaction mechanism comprises an axle seat (2) which is fixedly installed at the middle position of the spraying pipe (13), the inner tower body (11) is fixedly installed with a support (21) which is located above the feeding port (12), the axle seat (2) and the support (21) are rotatably installed with a shaft rod (22), the shaft rod (22) is fixedly installed with a reciprocating screw rod shaft (23), the reciprocating screw rod shaft (23) is sleeved with a reciprocating screw rod sleeve (24), the reciprocating screw rod sleeve (24) is installed with a first cross rod (25), the support (21) is installed with a second cross rod (26), the first cross rod (25) and the second cross rod (26) are fixedly connected with a bearing plate (27) which is spirally sleeved outside the shaft rod (22), the bearing plate (27) is uniformly provided with first through holes (28), the top of the bearing plate (27) is fixedly covered with a microorganism carrier (29), and the bottom of the inner tower body (11) is installed with a driving mechanism.

2. A biological trickling filter sewage deodorization device according to claim 1, characterized in that: A plurality of evenly distributed and scattered shunt pipes (14) are fixedly and communicatively connected to the spraying pipe (13), and the inner diameter of the shunt pipe (14) gradually decreases from the spraying pipe (13) to the outside, and a plurality of evenly distributed spray heads (15) are fixedly installed at the bottom of the shunt pipe (14).

3. A biological trickling filter sewage deodorization device according to claim 2, characterized in that: An annular cavity (17) is formed between the outer tower body (1) and the inner tower body (11), both ends of the spraying pipe (13) are communicated to the inside upper position of the annular cavity (17), and guide vanes (18) are fixedly installed in the annular cavity (17), and the guide vanes (18) are arranged in a spiral structure, and the water outlet end of the pump water assembly (16) is communicated to the inside lower position of the annular cavity (17).

4. A biological trickling filter sewage deodorization device according to claim 1, characterized in that: The first cross rod (25) is rotatably connected with the reciprocating screw rod sleeve (24), and the second cross rod (26) is rotatably connected with the support (21).

5. A biological trickling filter sewage deodorization device according to claim 1, characterized in that: A cylinder (3) is fixedly installed outside the shaft rod (22) on the support (21), and a ring plate (31) is slidably installed in the cylinder (3), a connecting rod (32) which is parallel to the shaft rod (22) is fixedly connected between the reciprocating screw rod sleeve (24) and the ring plate (31), and the connecting rod (32) is slidably connected with the top of the cylinder (3).

6. A biological trickling filter sewage deodorization device according to claim 5, characterized in that: A rubber layer (4) is fixedly covered on the bottom of the bearing plate (27), second through holes (41) corresponding to the plurality of first through holes (28) are formed in the rubber layer (4), and air bags (42) are installed in the second through holes (41).

7. A biological trickling filter sewage deodorization device according to claim 6, characterized in that: The outer size of the ring plate (31) is matched with the inner size of the cylinder (3), a piston cavity (43) is arranged above the ring plate (31) in the cylinder (3), and the bottom of the piston cavity (43) is communicated with the interiors of a plurality of air bags (42), and the air bags (42) and the piston cavity (43) are filled with liquid medium.

8. A bio-trickling filter wastewater deodorization device according to claim 1, characterized in that: The driving mechanism comprises a turbofan chamber (5), a plurality of water inlets (51) are formed in the top of the turbofan chamber (5) and communicated with the bottom of the inner tower body (11), a water outlet (52) is formed in one side of the turbofan chamber (5) and communicated with the water pumping end of the water pumping assembly (16), a fan blade (53) is rotatably arranged between the water inlet (51) and the water outlet (52) in the turbofan chamber (5), and the lower end of the shaft rod (22) is fixedly connected with the shaft center position of the fan blade (53).

9. A biological trickling filter sewage deodorization device according to claim 8, characterized in that: A ratchet mechanism is arranged outside the lower end of the shaft rod (22), the ratchet mechanism comprises a shell (6) fixedly arranged on the top of the turbofan chamber (5), a ratchet body (61) is fixedly arranged outside the lower end of the shaft rod (22) and rotatably arranged in the shell (6), a pawl (62) matched with the ratchet body (61) is rotatably arranged in the shell (6), and a spring (63) for elastically supporting the pawl (62) is arranged in the shell (6).

10. A method for deodorizing wastewater by a bio-trickling filter, characterized by: The biological trickling filter tower wastewater deodorization method is suitable for the biological trickling filter tower wastewater deodorization device in any one of claims 1-9, and comprises the following steps: S1, the to-be-processed odor-containing wastewater is continuously introduced into the bottom of the inner tower body (11) through the feed inlet (12); S2, the wastewater in the bottom of the inner tower body (11) is pumped to the bottom of the annular cavity (17) by the water pumping assembly (16), and the wastewater is guided to stably rise to the top of the annular cavity (17) under the guidance of the guide vane (18) and then uniformly enters the spray pipe (13), and is sprayed in the form of fine water flow downward from the uniformly distributed spray heads (15) through the shunt pipe (14); S3, the odor in the wastewater in the bottom of the inner tower body (11) flows upward and is in countercurrent contact with the wastewater sprayed downward in S2, so that preliminary gas-phase mass transfer and water-phase absorption are performed; S4, the wastewater in the bottom of the inner tower body (11) is pumped into the water inlet (51) of the turbofan chamber (5) and impacts the fan blade (53), so that the shaft rod (22) is driven to rotate in one direction under the limitation of the ratchet mechanism; S5, the one-way rotating shaft rod (22) drives the reciprocating screw rod shaft (23) to rotate, forces the meshed reciprocating screw rod sleeve (24) to drive the spiral-shaped carrier plate (27) and the microbial carriers (29) thereon to perform axial reciprocating compression and stretching movement, peels off the attachments on the surface of the microbial carriers (29), and prolongs the gas-liquid contact path. S6. When the support plate (27) is stretched, the ring plate (31) is driven to move upward through the connecting rod (32), compressing the piston chamber (43) and forcing the liquid medium into the air bag (42), causing it to expand and reduce the opening of the first through hole (28) at the bottom of the microbial carrier (29), promoting the retention and deep reaction of sewage inside the microbial carrier (29). When the support plate (27) is compressed, the ring plate (31) is driven to move downward to increase the piston chamber (43), causing the air bag (42) to contract and increase the opening of the first through hole (28), which is conducive to the smooth discharge of sewage after reaction. S7. The water body that has been fully degraded and purified by microorganisms is discharged as treated effluent, and the purified gas in the sewage is discharged from the top of the inner tower body (11).

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