Low-temperature-resistant and anti-clogging artificial wetland system capable of uniformly distributing water

Abstract

The utility model provides an anti-low temperature uniform water distribution anti-clogging artificial wetland system, which comprises a water inlet unit, a treatment unit, a water outlet unit and a cleaning unit, sewage to be treated flows into the water inlet unit, and the water flow can be adjusted through the water inlet unit; the water inlet unit is communicated with one end of the treatment unit and is used for uniformly distributing water to the treatment unit, and the treatment unit is used for treating inflowing sewage; the water outlet unit is communicated with the other end of the treatment unit, water treated by the treatment unit flows out through the water outlet unit, and the water outlet unit can regulate and control the operation water level of the treatment unit so as to realize low-temperature-resistant operation; the cleaning unit is suitable for cleaning the treatment unit to prevent the treatment unit from being blocked. The low-temperature-resistant uniform-water-distribution anti-blocking artificial wetland system provided by the utility model has the technical effects of uniform water distribution, difficulty in blocking during sewage treatment, low-temperature-resistant operation and high sewage treatment efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of constructed wetland technology, and more specifically, it relates to a low-temperature resistant, uniformly distributed, and anti-clogging constructed wetland system. Background Technology

[0002] Constructed wetland wastewater treatment systems, as a novel ecological restoration technology for wastewater bodies, utilize the synergistic effects of physical, chemical, and biological processes involving fillers (including soil), plants, and microorganisms to purify wastewater. They offer advantages such as low construction costs, ease of operation and maintenance, near-zero power operation, buffering of hydraulic and pollution load impacts, and simple and practical technology, making them a rapidly developing new wastewater treatment technology in recent years.

[0003] Given the numerous advantages of constructed wetlands, they are widely used in my country's ecological and environmental infrastructure construction, and various combinations of wetland technologies, structures, and substrate compositions have been proposed and applied. However, in general, the limitations of constructed wetlands have not been effectively overcome, mainly in the following three aspects.

[0004] First, it has low hydraulic load and occupies a large land area.

[0005] Secondly, the treatment efficiency is greatly affected by temperature. Wastewater treatment is not effective under low-temperature conditions, which limits the promotion and application of constructed wetlands in northern my country.

[0006] Third, the adsorption capacity of the packing material in subsurface flow wetlands gradually becomes saturated, and the pores gradually become clogged. While subsurface flow wetlands offer better treatment results than surface flow wetlands, they are more prone to pore clogging, leading to a gradual decline in their purification function and limiting the further application of subsurface flow wetland technology.

[0007] Therefore, there is an urgent need to develop a technology that can save land resources, ensure that wetland treatment capacity is not significantly reduced under low temperature weather conditions, reduce maintenance costs, and extend the life of substrate filler. This technology has broad application value and significant environmental, economic and social benefits. Utility Model Content

[0008] The purpose of this invention is to provide a low-temperature resistant, uniformly distributed, and clog-resistant constructed wetland system, which aims to solve the technical problems of uneven water distribution, easy clogging, and poor performance in low-temperature winter operations in existing constructed wetlands.

[0009] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a low-temperature resistant, uniformly distributed, and clog-resistant constructed wetland system, comprising:

[0010] The wastewater to be treated flows into the inlet unit, and the water flow rate of the inlet unit can be adjusted.

[0011] The treatment unit is connected to one end of the water inlet unit and is used to evenly distribute water to the treatment unit. The treatment unit is used to treat the incoming sewage.

[0012] The water outlet unit is connected to the other end of the treatment unit. The water treated by the treatment unit flows out through the water outlet unit. The water outlet unit can regulate the operating water level of the treatment unit to achieve low-temperature operation.

[0013] A cleaning unit is provided to clean the processing unit in order to prevent the processing unit from becoming clogged.

[0014] In one possible implementation, the water inlet unit includes:

[0015] A water inlet channel is provided on the side near the treatment unit, and a water passage hole is opened on the side of the water inlet channel near the treatment unit, through which water inside the water inlet channel flows out;

[0016] An adjustable gate is slidably connected to the water inlet channel and is used to block and cover the water passage. The adjustable gate is adapted to adjust the opening of the water passage by sliding, thereby adjusting the water flow rate to the treatment unit.

[0017] A water distribution tank is located above the processing unit and below the water passage hole, and the water distribution tank is used to receive water flowing out from the water passage hole;

[0018] The main water distribution pipe is connected at its upper end to the bottom of the water distribution tank;

[0019] The perforated water distribution pipe is horizontally arranged and connected to the lower end of the main water distribution pipe. Water discharged from the water distribution tank passes through the main water distribution pipe and the perforated water distribution pipe in sequence and flows into the interior of the treatment unit.

[0020] In one possible implementation, the processing unit includes:

[0021] An impermeable layer is installed at the bottom of the pool.

[0022] A lightweight granular packing bed, located at the upper end of the seepage-proof layer, includes lightweight granular packing of a certain thickness. The density of the lightweight granular packing is less than 1000 kg / m³. During the cleaning process, the lightweight granular packing bed is in a suspended fluidized state.

[0023] The upper box is composed of multiple and evenly arranged upper boxes. The upper box is filled with box packing material and wetland plants are planted inside the upper box. The density of the box packing material is greater than 1000 kg / m³. The multiple upper boxes are used to restrict the floating of the lightweight granular packing bed. The multiple upper boxes and the multiple box packing materials form multiple modular units.

[0024] The box packing material can be removed from and inserted into the upper box, and the lightweight granular packing material, the box packing material, and the wetland plants are all used for wastewater treatment.

[0025] In one possible implementation, the upper housing includes:

[0026] A wire mesh box with an open top is provided. The box is filled with filler material. Wetland plants are buried or planted inside the wire mesh box and grow upwards from the top of the wire mesh box. The wire mesh box has multiple evenly distributed mesh holes, and the diameter of the mesh holes is smaller than the diameter of the filler material.

[0027] A handle is attached to the outside of the wire mesh box.

[0028] In one possible implementation, the lightweight particulate filler is ceramsite or composite ceramsite with a particle size of 20-25 mm.

[0029] In one possible implementation, the water outlet unit includes:

[0030] The water outlet channel is located on the other side near the processing unit;

[0031] A perforated water collection pipe is horizontally installed at the bottom inside the treatment unit.

[0032] One end of the main water collection pipe is connected to the perforated water collection pipe;

[0033] A rotating elbow connects one end to the other end of the main water collection pipe;

[0034] The water outlet pipe has one end connected to the other end of the rotary elbow, and the other end placed inside the water outlet channel. The water treated by the treatment unit flows into the water outlet channel after passing through the perforated water collection pipe, the main water collection pipe, the rotary elbow and the water outlet pipe in sequence.

[0035] By rotating the rotary elbow, the height of the end of the water outlet pipe furthest from the rotary elbow can be adjusted, thereby regulating the operating water level of the treatment unit to achieve low-temperature operation.

[0036] In one possible implementation, the cleaning unit includes:

[0037] A clean water pipe, one end of which is connected to the inside of the pool, is used to fill the pool with clean water;

[0038] A mobile aeration device includes a perforated aeration pipe located at the bottom of the inner side of the treatment unit. After the lightweight granular packing bed floats to the surface, the perforated aeration pipe is inserted under the lightweight granular packing bed. The mobile aeration device is adapted to drive the perforated aeration pipe to move along the length of the tank and to deliver gas into the perforated aeration pipe. The gas output from the perforated aeration pipe is used to agitate the water and to blow off and clean the sediments adhering to the lightweight granular packing.

[0039] A drain pipe, one end of which is connected to the inside of the pool, is used to drain the water inside the pool after it has been cleaned.

[0040] When the lightweight granular packing material of the treatment unit becomes clogged, it is removed from the upper tank, and clean water is injected into the tank through the clean water pipe. When the clean water level reaches the bottom of the original position of the upper tank, the lightweight granular packing material bed is in a suspended fluidized state under the buoyancy of the water.

[0041] In one possible implementation, the mobile aeration device includes:

[0042] A mobile aerator, installed on the ground, has an aeration end for aeration, and the mobile aerator has a degree of freedom of movement along the length of the pool.

[0043] A connecting rod is fixedly connected at one end to the mobile aerator and at the other end to the perforated aeration pipe. The connecting rod is used to drive the perforated aeration pipe to move.

[0044] An aeration connection hose is connected at one end to the aeration end of the mobile aerator and at the other end to the perforated aeration pipe. The aeration connection hose is used to deliver gas into the perforated aeration pipe.

[0045] In one possible implementation, the mobile aerator includes:

[0046] A mobile trolley is placed on the ground and has the freedom to move in any direction. One end of the connecting rod is fixedly connected to the mobile trolley, and the connecting rod moves when the mobile trolley moves.

[0047] An aerator, connected to the upper end of the mobile cart, has an aeration end for aeration.

[0048] In one possible implementation, the mobile aerator further includes:

[0049] The electrical control unit is electrically connected to the mobile cart and the aerator, and has a control module that controls the operation of the mobile cart and the aerator respectively.

[0050] The beneficial effects of this invention's low-temperature resistant, uniform water distribution, and anti-clogging constructed wetland system are as follows: Compared with the prior art, this invention's low-temperature resistant, uniform water distribution, and anti-clogging constructed wetland system includes an inlet unit, a treatment unit, an outlet unit, and a cleaning unit. Wastewater to be treated flows into the inlet unit, and the water flow rate of the inlet unit can be adjusted. The inlet unit is connected to one end of the treatment unit and is used to uniformly distribute water to the treatment unit, which treats the incoming wastewater. The outlet unit is connected to the other end of the treatment unit, and the water treated by the treatment unit flows out through the outlet unit. The outlet unit can regulate the operating water level of the treatment unit to achieve low-temperature resistant operation. The cleaning unit is suitable for cleaning the treatment unit to prevent clogging. This solves the technical problems of uneven water distribution, easy clogging during wastewater treatment, and poor performance in low-temperature winter operation. It has the technical effects of uniform water distribution, resistance to clogging during wastewater treatment, low-temperature resistant operation, and high wastewater treatment efficiency. Attached Figure Description

[0051] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0052] Figure 1 A schematic diagram of a low-temperature resistant, uniformly distributed, and clog-resistant constructed wetland system provided for an embodiment of this utility model;

[0053] Figure 2 A top view of an artificial wetland system for low-temperature uniform water distribution and anti-clogging provided in an embodiment of this utility model;

[0054] Figure 3 A front view of an artificial wetland system for low-temperature uniform water distribution and anti-clogging provided in an embodiment of this utility model;

[0055] Figure 4 A schematic diagram of the usage state structure of the water inlet unit of an anti-low temperature uniform water distribution and anti-clogging constructed wetland system provided in this embodiment of the utility model;

[0056] Figure 5 A schematic diagram of another usage state of the water inlet unit of an anti-low temperature uniform water distribution and anti-clogging constructed wetland system provided for an embodiment of this utility model;

[0057] Figure 6 A front view of the treatment unit structure of an anti-low temperature uniform water distribution and anti-clogging constructed wetland system provided in this embodiment of the utility model;

[0058] Figure 7 A schematic diagram of the upper box structure of a low-temperature resistant, uniformly distributed, and anti-clogging constructed wetland system provided for an embodiment of this utility model;

[0059] Figure 8 A schematic diagram of the exploded structure of the upper box of the treatment unit of an artificial wetland system for low-temperature uniform water distribution and anti-clogging, provided for an embodiment of this utility model;

[0060] Figure 9 A top view of the water outlet unit structure of an anti-low temperature uniform water distribution and anti-clogging constructed wetland system provided in this embodiment of the utility model;

[0061] Figure 10 A front view of the water outlet unit structure of an anti-low temperature uniform water distribution and anti-clogging constructed wetland system provided in this embodiment of the utility model;

[0062] Figure 11 A schematic diagram showing the rotating elbow of the outlet unit of an anti-low temperature uniform water distribution and anti-clogging constructed wetland system provided for an embodiment of this utility model, comparing its state after rotation with its original state and the difference in operating water level.

[0063] Figure 12 This is a schematic diagram of the cleaning unit structure of an artificial wetland system that is resistant to low temperatures, provides uniform water distribution, and prevents clogging, as provided in an embodiment of this utility model.

[0064] In the diagram: 1. Water inlet unit; 11. Water inlet channel; 12. Adjustable gate; 13. Water distribution trough; 14. Main water distribution pipe; 15. Perforated water distribution pipe; 16. Water passage hole; 17. Scale;

[0065] 2. Treatment unit; 21. Impermeable layer; 22. Lightweight granular packing bed; 23. Upper box; 231. Box packing; 232. Wetland plants; 233. Wire mesh box; 234. Handle; 235. Mesh;

[0066] 3. Water outlet unit; 31. Water outlet channel; 32. Perforated water collection pipe; 33. Main water collection pipe; 34. Rotary elbow; 35. Water outlet pipe;

[0067] 4. Cleaning unit; 41. Clean water pipe; 42. Mobile aeration device; 421. Perforated aeration pipe; 422. Mobile aerator; 4221. Mobile cart; 4222. Aerator; 423. Connecting rod; 424. Aeration connecting hose; 43. Drain pipe. Detailed Implementation

[0068] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0069] Please refer to the following: Figures 1 to 12 This invention provides a low-temperature resistant, uniformly distributed, and anti-clogging constructed wetland system. The system includes an inlet unit 1, a treatment unit 2, an outlet unit 3, and a cleaning unit 4. Wastewater to be treated flows into the inlet unit 1, and the water flow rate of the inlet unit 1 is adjustable. The inlet unit 1 is connected to one end of the treatment unit 2 and is used to uniformly distribute water into the treatment unit 2, which treats the incoming wastewater. The outlet unit 3 is connected to the other end of the treatment unit 2, and the water treated by the treatment unit 2 flows out through the outlet unit 3. The outlet unit 3 can regulate the operating water level of the treatment unit 2 to achieve low-temperature resistant operation. The cleaning unit 4 is suitable for cleaning the treatment unit 2 to prevent clogging.

[0070] This utility model provides a low-temperature resistant, uniform water distribution, and anti-clogging constructed wetland system. Compared with the prior art, this utility model's low-temperature resistant, uniform water distribution, and anti-clogging constructed wetland system, through the setting of an inlet unit 1 that can adjust the water flow, enables the sewage to be evenly distributed to the treatment unit 2. Through the setting of an outlet unit 3, the operating water level of the treatment unit 2 can be controlled, thereby enabling low-temperature operation. Through the setting of a cleaning unit 4, the treatment unit 2 can be cleaned, effectively preventing clogging. It solves the technical problems of uneven water distribution, easy clogging during sewage treatment, and poor performance in low-temperature winter operation. It has the technical effects of uniform water distribution, easy clogging during sewage treatment, resistance to low-temperature operation, and high sewage treatment efficiency.

[0071] In some embodiments, please refer to Figures 1-3 , Figures 4-5The water inlet unit 1 includes an inlet channel 11, an adjustable gate 12, a water distribution trough 13, a main water distribution pipe 14, and a perforated water distribution pipe 15. The inlet channel 11 is located on the side near the treatment unit 2, and a water passage hole 16 is opened on the side of the inlet channel 11 near the treatment unit 2. Water inside the inlet channel 11 flows out through the water passage hole 16. The adjustable gate 12 is slidably connected to the inlet channel 11 and is used to block and cover the water passage hole 16. The adjustable gate 12 is adapted to adjust the water passage hole 16 by sliding. The opening of valve 6 adjusts the water flow rate to treatment unit 2. Water distribution tank 13 is located above treatment unit 2 and below water passage 16, receiving water flowing from water passage 16. The upper end of water distribution main pipe 14 connects to the bottom of water distribution tank 13. Perforated water distribution pipe 15 is horizontally positioned and connected to the lower end of water distribution main pipe 14. Water discharged from water distribution tank 13 passes sequentially through water distribution main pipe 14 and perforated water distribution pipe 15, flowing into treatment unit 2. Wastewater to be treated flows into inlet channel 11. When adjustable gate 12 is opened, wastewater inside inlet channel 11 is discharged through water passage 16 and flows into water distribution tank 13, finally flowing into treatment unit 2 through perforated water distribution pipe 15. The adjustable gate 12 is slidably connected to the side of the inlet channel 11. The sliding direction of the adjustable gate 12 is vertical. Sliding downward can block the water passage 16, and sliding upward can block or open the water passage 16. The opening degree or range of the water passage 16 can be adjusted by the lifting height of the adjustable gate 12. The larger the opening degree, the larger the water flow, and vice versa, thus realizing the regulation of water flow.

[0072] Specifically, a scale 17 is installed on the side of the inlet channel 11 to show the water level inside the channel. The upper end of the distribution tank 13 is open or can be closed to hold water, serving as a buffer and temporary storage for the water. Normally, the main water distribution pipe 14 is vertically installed, with its lower end connected to the middle of the perforated water distribution pipe 15. The perforated water distribution pipe 15 is a type of water pipe with multiple holes evenly distributed along its axial direction. Wastewater can flow out from the holes and towards the treatment unit 2.

[0073] In some embodiments, please refer to Figures 1-3 , Figures 6-8The treatment unit 2 includes a seepage-proof layer 21, a lightweight granular packing bed 22, and an upper chamber 23. The seepage-proof layer 21 is located at the bottom of the tank. The lightweight granular packing bed 22 is located above the seepage-proof layer 21 and includes lightweight granular packing of a certain thickness with a density of less than 1000 kg / m³. During the cleaning process, the lightweight granular packing bed 22 is in a suspended fluidized state. Multiple upper chambers 23 are evenly arranged, and each upper chamber 23 is filled with chamber packing 231. The tank is planted with wetland plants 232. The density of the box-type packing material 231 is greater than 1000 kg / m³. Multiple upper boxes 23 are used to restrict the floating of the lightweight granular packing bed 22. The multiple upper boxes 23 and multiple box-type packing materials 231 form multiple modular units. The box-type packing material 231 can be taken out from inside the upper box 23 and inserted into the upper box 23, realizing modular rapid assembly. The lightweight granular packing material, box-type packing material 231, and wetland plants 232 are all used for wastewater treatment. The impermeable layer 21 can prevent water from seeping into the lower part of the tank or into the soil. This impermeable layer 21 is a prior art technology and is coated on the bottom wall of the tank. The tank has a pit-like structure in the prior art. Multiple lightweight granular packing materials are combined to form a lightweight granular packing bed 22, which is distributed on the upper part of the impermeable layer 21. Multiple upper chambers 23 are arranged in contact with each other, that is, two adjacent upper chambers 23 are in contact with each other, located at the upper end of the lightweight particle packing bed 22, which plays a role in pressing down the lightweight particle packing bed 22.

[0074] In some embodiments, please refer to Figures 1-3 , Figures 6-8 The upper box 23 includes a wire mesh box 233 and handles 234. The upper end of the wire mesh box 233 is open. The box filler 231 is filled inside the wire mesh box 233. Wetland plants 232 are buried or planted inside the wire mesh box 233 at the bottom and extend upwards from the top of the wire mesh box 233. The wire mesh box 233 has a plurality of evenly distributed mesh holes 235. The diameter of the mesh holes 235 is smaller than the diameter or particle size of the box filler 231, so that the box filler 231 will not leak out from the mesh holes 235. The handles 234 are connected to the outside of the wire mesh box 233. The wire mesh box 233 is a wire mesh box made of lead wire. The mesh box has mesh holes 235 and is square in shape when viewed from above. There are four handles 234, which are all located at the upper ends of the four ends of the wire mesh box 233 for workers to hold and pull the wire mesh box 233 to move it. The box packing 231 is an integral structure formed by the combination of multiple packings filled inside the wire mesh box 233. The particle size of the box packing 231 refers to the diameter of a single packing.

[0075] As a preferred embodiment, the length, width, and height of the wire mesh box 233 are 0.3m, 1m, and 1m, respectively.

[0076] In some embodiments, please refer to Figures 1-3 , Figures 6-8The lightweight granular filler is made of ceramsite or composite ceramsite with a particle size of 20-25 mm; the box filler 231 has a particle size of 10-20 mm. The lightweight granular filler is in a suspended fluidized state during the cleaning process. During operation, the lightweight granular filler is in a compacted state, purifying the water through the physicochemical action of the granular filler itself, the presence of numerous microorganisms attached to it, and the action of plants. During cleaning, the lightweight granular filler is in a suspended fluidized state, facilitating the removal of impurities and old biofilm from the gaps in the filler, which are then discharged outside the treatment unit 2. The box filler 231 can be made of gravel, which has a density greater than that of water, while the lightweight granular filler has a density less than that of water. The box filler 231 acts as an anti-buoyancy barrier for the lightweight granular filler, preventing its loss, while the upper box 23 provides an attachment substrate for plant growth. In this embodiment, a certain thickness of lightweight granular filler refers to an integral structure formed by combining multiple lightweight granular fillers (i.e., ceramsite or composite ceramsite), which has a certain thickness.

[0077] In winter, the wetland plants 232 growing on the upper chamber 23 can be harvested and laid flat to cover the top of the upper chamber 23. As a slow-release plant carbon source, it increases the C / N ratio of the treated water in winter, promotes ammonification and denitrification, and the covering plants can also play a role in heat preservation.

[0078] In some embodiments, please refer to Figures 1-2 , Figures 9-11The water outlet unit 3 includes an outlet channel 31, a perforated water collection pipe 32, a main water collection pipe 33, a rotary elbow 34, and an outlet pipe 35. The outlet channel 31 is located near the other side of the treatment unit 2. The perforated water collection pipe 32 is horizontally located at the bottom of the inner side of the treatment unit 2. One end of the main water collection pipe 33 is connected to the perforated water collection pipe 32. One end of the rotary elbow 34 is connected to the other end of the main water collection pipe 33. One end of the outlet pipe 35 is connected to the other end of the rotary elbow 34, and the other end is placed inside the outlet channel 31. The water treated by the treatment unit 2 flows into the outlet channel 31 after passing through the perforated water collection pipe 32, the main water collection pipe 33, the rotary elbow 34, and the outlet pipe 35 in sequence. By rotating the rotary elbow 34, the height of the end of the outlet pipe 35 away from the rotary elbow 34 can be adjusted, thereby regulating the operating water level of the treatment unit 2 to achieve low-temperature operation. The outlet channel 31 and the inlet channel 11 are respectively located on both sides or at both ends of the pool. The perforated water collection pipe 32 is also a type of water pipe with multiple holes evenly distributed along the pipe axis. The treated water enters the perforated water collection pipe 32 through the holes and finally flows into the outlet channel 31. It should be noted that in the actual use, the rotating elbow 34 can be rotated reasonably according to the water level to control the water level. The rotating elbow 34 is a type of rotary joint in the prior art. It can rotate itself, thereby driving the outlet pipe 35 to rotate or swing together. Excess water will be discharged from the outlet pipe 35 into the outlet channel 31. The water level in the outlet pipe 35 is the same as the water level in the treatment unit 2.

[0079] Specifically, the water level in the outlet pipe 35 is varied by rotating the elbow 34, thereby regulating the water level in treatment unit 2 to meet the wetland's water level requirements during operation. Especially in low-temperature winter conditions, the water level can be raised initially, and after a certain thickness of ice has formed on the wetland surface, the water level in treatment unit 2 can be lowered, creating an air layer between the ice layer and the lightweight granular filler, with a thickness of [missing information]. Figure 11 The height represented by H in the middle serves to insulate the area, allowing the wetland to continue operating even in low-temperature winter conditions.

[0080] In some embodiments, please refer to Figures 1-2 , Figure 12The cleaning unit 4 includes a clean water pipe 41, a mobile aeration device 42, and an vent pipe 43. One end of the clean water pipe 41 is connected to the inside of the tank and is used to fill the tank with clean water. The mobile aeration device 42 includes a perforated aeration pipe 421 located at the bottom of the inner side of the treatment unit 2. After the lightweight granular packing bed 22 floats up, the perforated aeration pipe 421 passes under the lightweight granular packing bed 22. The mobile aeration device 42 is adapted to drive the perforated aeration pipe 421 to move along the length of the tank and to deliver air into the perforated aeration pipe 421. The gas output from the perforated aeration pipe 421 is used to agitate the water and blow off and clean the sediment adhering to the lightweight granular packing. One end of the vent pipe 43 connects to the inside of the tank to discharge the cleaned water. When the lightweight granular packing in treatment unit 2 becomes clogged, the upper tank 23 is moved away, and clean water is introduced into the tank through the clean water pipe 41. When the clean water level reaches the bottom of the original position of the upper tank 23, the lightweight granular packing bed 22 is in a suspended fluidized state under the buoyancy of the water. The reciprocating movement of the mobile aeration device 42 blows off the sediment on the lightweight granular packing, thus preventing sediment from clogging it. After cleaning, the vent pipe 43 can be opened to discharge the wastewater. The perforated aeration pipe 421 is an aeration pipe with multiple holes evenly distributed along its axial direction to achieve aeration. This invention restores the normal operating capacity of treatment unit 2 after cleaning.

[0081] When a blockage occurs, the upper chamber 23 is moved away by holding the handle, leaving the lightweight granular packing bed 22. The lightweight granular packing bed 22 will then float and move, allowing clean water to be introduced into the treatment unit 2 through the clean water pipe 41. The clean water causes the packing material of the lightweight granular packing bed 22 to be in a suspended fluidized state. The mobile aeration device 42 is used to stir the water and blow off the sediment attached to the lightweight granular packing. Finally, the wastewater is discharged through the vent pipe 43, thus cleaning the lightweight granular packing.

[0082] The mobile aeration device 42 allows for periodic cleaning, achieving anti-clogging operation of the treatment unit 2 and solving technical problems such as easy clogging and high maintenance difficulty in common existing technologies. After cleaning, the perforated aeration pipe 421 is removed, and the cleaning wastewater is discharged through the vent pipe 43.

[0083] In some embodiments, please refer to Figures 1-2 , Figure 12The mobile aeration device 42 includes a mobile aerator 422, a connecting rod 423, and an aeration connecting hose 424. The mobile aerator 422 is located on the ground and has an aeration end for aeration. The mobile aerator 422 has the freedom to move along the length of the tank. One end of the connecting rod 423 is fixedly connected to the mobile aerator 422, and the other end is fixedly connected to the perforated aeration pipe 421. The connecting rod 423 is used to drive the perforated aeration pipe 421 to move. One end of the aeration connecting hose 424 is connected to the aeration end of the mobile aerator 422, and the other end is connected to the perforated aeration pipe 421. The aeration connecting hose 424 is used to deliver gas into the perforated aeration pipe 421. The mobile aerator 422 can reciprocate, thereby driving the connecting rod 423 to move together. The connecting rod 423 can move together with the perforated aeration pipe 421, allowing the perforated aeration pipe 421 to reciprocate below the lightweight granular packing bed 22, thus cleaning the lightweight granular packing. The aeration connecting hose 424 can deform but will not bend, meaning it will not affect the delivery of gas into the perforated aeration pipe 421.

[0084] In some embodiments, please refer to Figures 1-2 , Figure 12 The mobile aerator 422 includes a mobile cart 4221, an aerator 4222, and an electrical control unit. The mobile cart 4221 is mounted on the ground and has the freedom to move in any direction. One end of a connecting rod 423 is fixedly connected to the mobile cart 4221, and the mobile cart 4221 moves, causing the connecting rod 423 to move as it moves. The aerator 4222 is connected to the upper end of the mobile cart 4221 and has an aeration end for aeration. The electrical control unit is electrically connected to both the mobile cart 4221 and the aerator 4222, and has control modules for controlling the operation of both. The mobile cart 4221 can move back and forth in any direction. By controlling the movement path of the mobile cart 4221, the movement path of the perforated aeration pipe 421 can be controlled, thus achieving the function of cleaning the lightweight granular packing. The mobile cart 4221 can be moved manually or by installing a driver at its bottom to drive its movement. In this embodiment, multiple actuators installed at the bottom of the mobile cart 4221 are controlled by an electronic control unit, which in turn drives the mobile cart 4221 to move. The direction of movement can be manually adjusted, thereby controlling the automatic movement of the perforated aeration pipe 421. The aerator 4222 is a prior art product capable of generating aeration, and its operation is controlled by the electronic control unit. The electronic control unit in this embodiment is prior art and includes a control panel, a PLC controller, control circuits, etc., which can be controlled by the operator.

[0085] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A low temperature resistant, uniform water distribution, clogging resistant, constructed wetland system, characterized in that, The application relates to a sewage treatment device. The device comprises: a water inlet unit, into which sewage to be treated flows, the water flow through the water inlet unit being adjustable; a treatment unit, which is in communication with one end of the water inlet unit and is used for uniformly distributing water to the treatment unit, and which is used for treating the sewage flowing in; a water outlet unit, which is in communication with the other end of the treatment unit, through which the water treated by the treatment unit flows out, and which can regulate the running water level of the treatment unit to realize low-temperature resistance operation; 2. The low temperature resistant uniform water distribution anti-clogging constructed wetland system according to claim 1, wherein, a cleaning unit, which is suitable for cleaning the treatment unit to prevent the treatment unit from being blocked. The water inlet unit comprises: a water inlet channel, which is arranged near one side of the treatment unit, and which is provided with a water passing hole near the side of the treatment unit, water inside the water inlet channel flowing out from the water passing hole; an adjustable gate, which is slidably connected to the water inlet channel and is used for blocking the water passing hole, the adjustable gate being suitable for adjusting the opening degree of the water passing hole through sliding, so as to adjust the water flow to the treatment unit; a water distribution tank, which is arranged above the treatment unit and below the water passing hole, and which is used for receiving the water flowing out from the water passing hole; a water distribution main pipe, the upper end of which is in communication with the bottom of the water distribution tank; 3. The low temperature resistant uniform water distribution anti-clogging constructed wetland system according to claim 1, wherein, a perforated water distribution pipe, which is arranged in a horizontal shape and is in communication with the lower end of the water distribution main pipe, the water discharged from the water distribution tank sequentially passing through the water distribution main pipe and the perforated water distribution pipe and flowing into the treatment unit. The treatment unit comprises: an anti-seepage layer, which is arranged at the bottom of the pool body; a light-weight granular filler bed, which is arranged at the upper end of the anti-seepage layer and comprises light-weight granular fillers with a density less than 1000 kg / m3, the light-weight granular filler bed being in a suspended and fluidized state during the cleaning process; a plurality of upper box bodies, which are arranged uniformly, are filled with box filler, are planted with wetland plants, have a density greater than 1000 kg / m3, and are used for limiting the light-weight granular filler bed from floating up, and the plurality of upper box bodies and the plurality of box fillers form a plurality of modular units; 4. The low temperature resistant uniform water distribution anti-clogging constructed wetland system of claim 3, wherein, wherein the box filler can be taken out from and loaded into the upper box body, and the light-weight granular filler, the box filler and the wetland plants are used for treating sewage. The upper box body comprises: a lead wire mesh box, the upper end of which is arranged in an open manner, the box filler being filled in the lead wire mesh box, the lower part of the wetland plants being buried or planted in the lead wire mesh box and the upper part of the wetland plants extending and growing above the lead wire mesh box, the lead wire mesh box being provided with a plurality of mesh holes arranged uniformly, the diameter of the mesh holes being smaller than the particle size of the box filler; 5. The low temperature uniform water distribution anti-clogging constructed wetland system of claim 3, wherein, a handle, which is connected to the outer side of the lead wire mesh box.

6. The low temperature uniform water distribution anti-clogging constructed wetland system of claim 1, wherein, The light-weight granular filler is ceramic granular or composite ceramic granular, and the particle size is 20-25 mm. The water outlet unit comprises: a water outlet channel, which is arranged near the other side of the treatment unit; a perforated water collecting pipe, which is arranged in a horizontal shape at the inner bottom of the treatment unit; a water collecting main pipe, one end of which is in communication with the perforated water collecting pipe; a rotary elbow, one end of which is in communication with the water collecting main pipe and the other end of which is in communication with An outlet pipe is connected to one end of the rotating elbow and placed inside the water outlet channel. The water treated by the treatment unit flows into the water outlet channel through the perforated water collecting pipe, the water collecting main pipe, the rotating elbow and the outlet pipe in sequence. The height of the outlet pipe away from the rotating elbow is adjusted by rotating the rotating elbow, so as to control the water level of the treatment unit to resist low-temperature operation.

7. The low temperature uniform water distribution anti-clogging constructed wetland system of claim 3, wherein, The cleaning unit comprises: A clean water pipe is connected to one end of the pool body and used to fill clean water into the pool body. A movable aeration device comprises a perforated aeration pipe arranged on the inside bottom of the treatment unit. When the light particle filler bed floats, the perforated aeration pipe penetrates below the light particle filler bed. The movable aeration device is suitable for moving the perforated aeration pipe along the length direction of the pool body and conveying gas into the perforated aeration pipe. The gas output from the perforated aeration pipe is used to agitate the water body and blow off and clean the sediments adhered to the light particle filler. A vent pipe is connected to one end of the pool body and used to discharge the water in the pool body after cleaning. When the light particle filler of the treatment unit is blocked, the upper box is moved away, clean water is filled into the pool body by using the clean water pipe, and when the height of the clean water reaches the height of the bottom of the original position of the upper box, the light particle filler bed is in a suspended and fluidized state under the action of the water body buoyancy.

8. The low temperature uniform water distribution anti-clogging constructed wetland system of claim 7, wherein, The movable aeration device comprises: A movable aeration machine is arranged on the ground and has an aeration end for aeration. The movable aeration machine has a moving degree along the length direction of the pool body. A connecting rod is fixedly connected to one end of the movable aeration machine and fixedly connected to the other end of the perforated aeration pipe. The connecting rod is used to move the perforated aeration pipe. An aeration connecting hose is connected to one end of the aeration end of the movable aeration machine and connected to the other end of the perforated aeration pipe. The aeration connecting hose is used to convey gas into the perforated aeration pipe.

9. The low temperature uniform water distribution anti-clogging constructed wetland system of claim 8, wherein, The movable aeration machine comprises: A movable cart is arranged on the ground and has a moving degree in any direction. One end of the connecting rod is fixedly connected to the movable cart. The movable cart moves to move the connecting rod. An aeration machine is connected to the upper end of the movable cart and has an aeration end for aeration.

10. The low temperature uniform water distribution anti-clogging constructed wetland system of claim 9, wherein, The movable aeration machine further comprises: An electric control part is electrically connected to the movable cart and the aeration machine respectively and has a control module for controlling the operation of the movable cart and the aeration machine respectively.

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