Water-filled drawer-type ecological purification system with small micro-discharge port

Abstract

The utility model relates to a water-filled drawer-type ecological purification system with a small micro discharge port. The water-filled drawer-type ecological purification system comprises main equipment, a primary filtering area, a drawer-type ecological bed and an aquatic plant area, the main device comprises an outer shell and an inner shell. The primary filtering area comprises an impermeable layer and a filling layer. The drawer type ecological bed comprises an ecological compartment, an ecological drawer, a connecting assembly and an air stripping device. And the gas stripping device comprises a gas guide pipe and a water guide pipe. Compared with the prior art, by arranging the outer shell and adopting the waterproof structure with the hollow interior, weight balancing can be carried out through water injection. By arranging the primary filtering area, the sewage is primarily treated by filling a water treatment filler. The drawer type ecological bed is arranged, multi-layer filler layered filling is adopted, water flows from the upstream to the downstream, multi-step purification is conducted from top to bottom, and it is guaranteed that water can be comprehensively purified under the composite action of multiple filler. Finally, the aquatic plant area is arranged, and the sewage is further purified through the biological action of ecological plants.

Description

A water-filled drawer-type micro-outlet ecological purification system Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a water-filled drawer-type micro-discharge outlet ecological purification system. Background Technology

[0002] Rivers are an indispensable part of human life and ecosystems; however, with the acceleration of industrialization and the improvement of urbanization, river pollution has become increasingly prominent. Among these issues, external pollution from river discharge outlets has become a key focus of pollution prevention and control. While the implementation of urban "zero direct discharge" and "rainwater and sewage separation" projects has effectively controlled the amount of sewage discharged from external outlets, some industrial or domestic sewage discharge outlets still affect river water quality.

[0003] Wastewater discharged from river outlets has high concentrations of organic matter and nitrogen and phosphorus, and is prone to producing odors (especially in hot summer weather). If left untreated, it will affect river water quality, leading to eutrophication, abnormal water color, low transparency, and oxygen deficiency, severely damaging the natural ecological environment of the river. Furthermore, the discharge time, concentration, composition, and flow rate of wastewater vary considerably, posing a significant challenge to conventional biological treatment systems. Common methods for treating discharge outlets involve chemical agents, which are not only costly and inefficient but also prone to secondary pollution, failing to maintain a healthy aquatic ecosystem in the long term. Summary of the Invention

[0004] In view of this, the present invention provides a water-filled drawer-type micro-outlet ecological purification system to solve the above-mentioned technical problems.

[0005] A water-filled drawer-type micro-outlet ecological purification system includes a main unit, an upstream primary filtration zone within the main unit, a drawer-type ecological bed in the central area of ​​the main unit, and an aquatic plant zone downstream of the main unit. The main unit has a double-layer structure, comprising an outer shell and an inner shell. The primary filtration zone includes a seepage-proof layer at its bottom and a filling layer within its internal space. The drawer-type ecological bed has a lower sidewall height near the primary filtration zone compared to the sidewall near the aquatic plant zone. The drawer-type ecological bed includes an ecological compartment between the primary filtration zone and the aquatic plant zone, multiple ecological drawers within the ecological compartment, multiple connecting components between the ecological compartment and the ecological drawers, and multiple air-lift devices within the ecological drawers. The ecological compartment is located in the center of the main unit's interior, with both ends abutting against the inner wall of the outer shell. The ecological compartment is made of a waterproof material and contains multiple spaced-apart small compartments. Multiple permeable holes are provided on the side wall of the ecological compartment near the primary filtration zone. The ecological drawer is a rectangular box-shaped structure made of impermeable material. The side wall of the ecological drawer near the primary filtration zone has dense perforations. The air-lift device is installed in each ecological drawer and includes an air guide pipe and a water guide pipe. The air inlet of the air guide pipe passes through the side wall of the ecological drawer near the primary filtration zone and is connected to an air source, and is located at the top of the ecological drawer near the aforementioned ecological plant layer. The air outlet of the air guide pipe is located at the bottom of the ecological drawer near the aforementioned zeolite layer. The air guide pipe extends vertically downward from the ecological plant layer to the zeolite layer of the ecological drawer. The water inlet of the water guide pipe is located on the side of the air outlet of the air guide pipe. The water outlet of the water guide pipe passes through the side wall of the ecological drawer near the aquatic plant area and is located at the top of the ecological drawer near the aforementioned ecological plant layer. A water outlet is provided on the side of the aquatic plant area away from the drawer-type ecological bed.

[0006] Furthermore, the water-filled drawer-type micro-discharge outlet ecological purification system also includes an aeration device installed inside the main equipment.

[0007] Furthermore, the outer shell is a hollow structure filled with an internal medium, and the inner shell uses a grid-type liner with a sieve structure and is filled with a carrier.

[0008] Furthermore, a water inlet is provided on the side of the primary filtration zone away from the drawer-type ecological bed. The water inlet includes a lifting gate on the outer shell and a debris barrier on one side of the lifting gate. The lifting gate is equipped with a lifting guide rail and a seepage-proof rubber liner. The debris barrier is located on the side of the lifting gate near the primary filtration zone and is spaced apart from the lifting gate by a predetermined distance.

[0009] Furthermore, the impermeable layer is made of impermeable geomembrane, and the filling layer is made of combined elastic filler.

[0010] Furthermore, the ecological drawer is configured from bottom to top as follows: a zeolite layer, a multifunctional filler layer, a volcanic rock layer, an irregular activated carbon layer, and an ecological plant layer.

[0011] Furthermore, the volume ratio of the zeolite layer to the multifunctional filler layer, the volcanic rock layer, and the ecological plant layer is 1:1 to 1:2, and the volume ratio of the zeolite layer to the irregular activated carbon layer is 1:1 to 1:3.

[0012] Furthermore, each of the connecting components includes a sliding guide rail disposed on the ecological compartment and a roller disposed on the ecological drawer. The sliding guide rail is fixed to the side of the ecological compartment near the ecological drawer, and the roller is fixed to the outer wall of the ecological drawer near the ecological compartment. The positions of the sliding guide rail and the roller correspond. The extension direction of the sliding guide rail is a vertical direction from the bottom of the river to the water surface, and the circumferential direction of the roller is consistent with the extension direction of the sliding guide rail.

[0013] Furthermore, pollution-tolerant ecological plants are cultivated in the aquatic plant area, selecting one or more of cattails, water spinach, and reeds.

[0014] Furthermore, the aeration device includes an air chamber located in the center of the drawer-type ecological bed, an air pump located on the air chamber, a pressure relief and air lift valve located on the air chamber, two nano-aeration discs located in the primary filtration zone and the aquatic plant zone respectively, and multiple air pipes connecting the air pump, the pressure relief and air lift valve and the nano-aeration discs.

[0015] Compared with existing technologies, the water-filled drawer-type micro-discharge outlet ecological purification system provided by this utility model, through its outer shell and hollow waterproof structure, allows for weight adjustment via water injection, thereby controlling the device's buoyancy in the river and facilitating installation and disassembly. The primary filtration zone, filled with water treatment packing, provides initial treatment of wastewater. The drawer-type ecological bed, using multi-layered packing and an internal air-lift device for reflux, ensures comprehensive purification of water quality through the combined action of multiple packing layers, with water flowing from upstream to downstream. The ecological drawer can be easily removed from the ecological compartment for cleaning, desorption, or replacement of worn-out packing, making maintenance convenient and operation simple. It is adaptable to various river environments, highly adaptable, and can be readily implemented using locally available materials. Finally, the aquatic plant zone further purifies the wastewater through the biological action of the plants, eliminating the need for chemicals and effectively maintaining a healthy aquatic ecosystem. Attached Figure Description

[0016] Figure 1 is a planar structural diagram of a water-filled drawer-type micro-drainage outlet ecological purification system provided by this utility model from a top view.

[0017] Figure 2 is a schematic diagram of the planar structure of the drawer-type ecological bed 30 in the water-filled drawer-type micro-drainage outlet ecological purification system of Figure 1 in the top view.

[0018] Figure 3 is a cross-sectional schematic diagram of part of the main equipment 10 of the water-filled drawer-type micro-drainage outlet ecological purification system in Figure 1 on section AA.

[0019] Figure 4 is a schematic diagram of the cross-sectional structure of the drawer-type ecological bed 30 in the BB section of the water-filled drawer-type micro-outlet ecological purification system in Figure 1.

[0020] Figure 5 is a flowchart of the installation process of the water-filled drawer-type micro-outlet ecological purification system shown in Figure 1. Detailed Implementation

[0021] The specific embodiments of this utility model are described in further detail below. It should be understood that the description of the embodiments of this utility model herein is not intended to limit the scope of protection of this utility model.

[0022] Figures 1 to 5 show the structural schematic diagrams of the water-filled drawer-type micro-discharge outlet ecological purification system provided by this utility model. The water-filled drawer-type micro-discharge outlet ecological purification system includes a main device 10, a primary filtration zone 20 located upstream within the main device 10, a drawer-type ecological bed 30 located in the central area within the main device 10, an aquatic plant zone 40 located downstream within the main device 10, and an aeration device 50 located within the main device 10. It is conceivable that the water-filled drawer-type micro-discharge outlet ecological purification system also includes other functional modules such as valves installed at the outlet, packing materials for water purification, etc., which are technologies known to those skilled in the art and will not be described in detail here.

[0023] The main equipment 10 can be made of one or more corrosion-resistant materials such as HDPE, polyvinyl chloride, fiberglass, and stainless steel, using a die-casting process. The main equipment 10 adopts a double-layer structure, including an outer shell 11 located on the outside, an inner shell 12 located on the inside, and a water inlet 13 located on the side of the primary filtration zone 20 away from the drawer-type ecological bed 30.

[0024] The outer shell 11 is die-cast from waterproof material and is a hollow structure filled with internal media. The material is rust-proof and corrosion-resistant, thus isolating the main equipment 10 from direct contact with the river water when it is placed in the working water area. The outer shell 11 encloses the installation area of ​​the primary filtration zone 20, the aquatic plant zone 40, and the drawer-type ecological bed 30, and seals the bottom of the enclosed area to allow wastewater to enter the equipment from the inlet 13 for treatment. Multiple drain ports and drain valves are provided inside the outer shell 11 for draining water. A backflushing port is provided at the top of the outer shell 11 for cleaning the interior and for adding water to adjust the counterweight before use, facilitating placement in the working water area. Furthermore, multiple drain ports and drain valves directly connected to the outside of the equipment, as well as a backflushing port, are also provided within the enclosed area of ​​the outer shell 11 for flushing the interior.

[0025] The inner shell 12 uses a grid-type liner with a sieve structure and is filled with a carrier. This carrier can be primarily porous packing material, such as polyurethane sponge, providing favorable conditions for microbial wastewater purification. Polyurethane sponge has a porous structure and a large specific surface area, providing abundant contact interfaces and adsorption sites, thereby achieving efficient adsorption and removal of suspended particles, dissolved organic matter, and heavy metal ions in wastewater.

[0026] The water inlet 13 includes a lifting gate 131 disposed on the outer casing 11, and a debris barrier 132 disposed on one side of the lifting gate 131.

[0027] The lifting gate 131 is equipped with a lifting guide rail and a seepage-proof rubber liner to achieve the sealing and opening of the equipment and control the water intake. A hydraulically driven impeller can also be configured at the water inlet on the inner side of the lifting gate 131 for homogenizing water intake. The aforementioned lifting guide rail, seepage-proof rubber liner, and hydraulically driven impeller are existing technologies widely used in the field of water conservancy and are well known to those skilled in the art. However, they are not the main content of this application, and therefore only their functions are briefly described here.

[0028] The debris barrier 132 is installed on the side of the lifting gate 131 near the primary filtration zone 20 to prevent suspended debris in the river from entering the equipment. A certain distance is maintained between the debris barrier 132 and the lifting gate 131 to accommodate the intercepted debris, ensuring that the lifting gate 131's operation is not affected by debris accumulation. The debris barrier 132 can be fixed with fasteners or clips for easy disassembly and cleaning of accumulated and tangled debris.

[0029] In use, the water inlet 13 is connected to the external discharge outlet of the river, and the connection can be made seamless by filling with impermeable material or by grouting, ensuring that sewage only enters the equipment from the water inlet 13 and does not directly enter the river and pollute the water. The bottom of the outer shell 11 is closed, and water can be injected into the outer shell 11 to submerge the equipment, while the top of the outer shell 11 is exposed above the water surface to facilitate the subsequent planting of aquatic plants in the drawer-type ecological bed 30 and the aquatic plant area 40.

[0030] The primary filtration zone 20 includes an impermeable layer 21 disposed at the bottom of the primary filtration zone 20, and a filling layer 22 disposed in the internal space of the primary filtration zone 20.

[0031] The impermeable layer 21 is made of impermeable geomembrane, which is used to prevent unpurified sewage from seeping into the river and polluting the river.

[0032] The filling layer 22 uses a combined elastic packing material, a novel type of water treatment packing material composed of special materials and structures. Its main structure includes fiber bundles, plastic rings, and other components, possessing unique performance characteristics. It cleverly combines fiber bundles and plastic rings to form a highly elastic and porous structure, offering advantages such as large specific surface area, high porosity, rapid biofilm formation, and resistance to clogging. For example, the use of combined elastic packing material is mentioned in Chinese utility model application CN202311572901.3, which describes an ultra-micro nanobubble oxygenation coupled flotation wastewater treatment device and method. This provides abundant attachment space for microorganisms, allowing them to form dense biofilms on the surface of the combined elastic packing material. These biofilms effectively reduce wastewater pollution levels and meet discharge standards by decomposing and transforming organic matter, heavy metals, and chemical substances in the wastewater.

[0033] In addition, the top of the primary filtration zone 20 can be sealed and equipped with an inspection port to prevent the filter media inside the primary filtration zone 20 from being affected by mud, dust or organisms due to its proximity to the riverbank, thereby reducing the filtration efficiency.

[0034] The drawer-type ecological bed 30 has a lower sidewall height near the primary filtration zone 20 than the sidewall height near the aquatic plant zone 40, which is used to prevent the water that has been purified by the drawer-type ecological bed 30 from flowing back into the aquatic plant zone 40.

[0035] The drawer-type ecological bed 30 includes an ecological compartment 31 disposed between the primary filtration zone 20 and the aquatic plant zone 40, multiple ecological drawers 32 disposed within the ecological compartment 31, multiple connecting components 33 disposed between the ecological compartment 31 and the ecological drawers 32, and multiple airlift devices 34 disposed within the ecological drawers 32.

[0036] The ecological compartment 31 is located in the center of the main equipment 10, with both ends abutting against the inner wall of the outer casing 11, separating the primary filtration zone 20 from the aquatic plant zone 40. The ecological compartment 31 is made of a waterproof material and contains multiple spaced-apart small compartments with an opening at the top for simultaneous insertion or removal of multiple ecological drawers 32. Multiple permeable holes are provided on the side wall of the ecological compartment 31 near the primary filtration zone 20, allowing wastewater that has undergone preliminary filtration in the primary filtration zone 20 to enter the ecological drawers 32 for further purification.

[0037] The ecological drawer 32 can be a rectangular box-shaped structure made of impermeable material, which can be inserted into multiple small compartments of the ecological compartment 31. The side wall of the ecological drawer 32 near the primary filtration zone 20 is provided with dense holes to allow sewage to enter.

[0038] The ecological drawer 32 is configured from bottom to top as follows: a zeolite layer, a multifunctional packing layer, a volcanic rock layer, an irregular activated carbon layer, and an ecological plant layer. The volume ratio of the zeolite layer to the multifunctional packing layer, the volcanic rock layer, and the ecological plant layer is 1:1 to 1:2, and the volume ratio of the zeolite layer to the irregular activated carbon layer is 1:1 to 1:3. The zeolite is a porous mineral composed of aluminosilicates, possessing a unique three-dimensional pore structure and high specific surface area. Its unique microporous structure and ion exchange capacity make zeolite perform excellently in treating wastewater containing heavy metals. The multifunctional packing can be one or more of the following fillers used in wastewater treatment: biofilm packing, reaction packing, semi-soft packing, and three-dimensional elastic packing, thus achieving better wastewater treatment efficiency, promoting microbial attachment and growth, and enhancing aeration capacity. The volcanic rock's role in wastewater treatment mainly includes adsorbing harmful substances, settling suspended solids, and promoting microbial degradation of organic matter. The irregular activated carbon's role in wastewater treatment mainly includes removing organic matter, heavy metal ions, and decolorizing and deodorizing. The aforementioned ecological plant layer can be composed of various pollution-tolerant potted plants, which can absorb odors, purify water, and are also aesthetically pleasing. These are all standard choices in the field of wastewater purification and should be well known to those skilled in the art; therefore, only their functions are briefly described here, without a detailed explanation of their underlying principles.

[0039] Each connecting component 33 includes a sliding guide rail 331 disposed on the ecological compartment 31 and a roller 332 disposed on the ecological drawer 32. The sliding guide rail 331 is fixed to the side of the ecological compartment 31 near the ecological drawer 32, and the roller 332 is fixed to the outer wall of the ecological drawer 32 near the ecological compartment 31. The sliding guide rail 331 and the roller 332 are positioned correspondingly to form a sliding rail structure, allowing the roller 332 to roll along the sliding guide rail 331 within the sliding guide rail 331. The sliding guide rail 331 extends vertically from the bottom of the riverbed to the water surface, and the circumferential direction of the roller 332 is consistent with the extension direction of the sliding guide rail 331, thereby enabling the lowering and raising of the ecological drawer 32, facilitating easy cleaning, desorption, and replacement of expired filler. Both the sliding guide rail 331 and the roller 332 are made of rust-resistant and wear-resistant materials to prevent rusting and damage during use in the riverbed.

[0040] In addition, the two adjacent ecological drawers 32 are connected by a connecting buckle to ensure a tight connection between them, preventing gaps from forming between the two adjacent ecological drawers 32, and thus preventing the sewage to be purified from entering the downstream directly from the upstream through the gaps.

[0041] The gas extraction device 34 is designed based on the gas extraction method. It disrupts the original gas-liquid two-phase equilibrium using a gaseous medium, establishing a new gas-liquid equilibrium state. This causes a component in the solution to desorb due to a decrease in partial pressure, achieving the purpose of separating substances. The gas extraction device 34 is installed in each of the ecological drawers 32 and includes a gas delivery pipe 341 and a water delivery pipe 342. The gas inlet of the gas delivery pipe 341 passes through the side wall of the ecological drawer 32 near the primary filtration zone 20 and is connected to a gas source. It is located at the top of the ecological drawer 32 near the aforementioned ecological plant layer. The gas outlet of the gas delivery pipe 341 is located at the bottom of the ecological drawer 32 near the aforementioned zeolite layer. In other words, the gas delivery pipe 341 extends vertically downwards from the ecological plant layer to the zeolite layer of the ecological drawer 32 for gas delivery. The inlet end of the water guide pipe 342 is located on the side of the outlet end of the air guide pipe 341, and the outlet end of the water guide pipe 342 passes through the side wall of the ecological drawer 32 near the aquatic plant area 40 and is located at the top of the ecological drawer 32 near the aforementioned ecological plant layer, so as to discharge the filtrate filtered by the ecological drawer 32 into the aquatic plant area 40.

[0042] The aquatic plant area 40 cultivates pollution-tolerant ecological plants, such as cattails, water spinach, and reeds, to remove residual COD, ammonia nitrogen, and total phosphorus from the water. An overflow pipe 41 is installed at the top of the aquatic plant area 40, connecting to the outside of the equipment, to increase the water output during flood season or heavy rain, discharging the water inside the equipment into the municipal pipe network or other treatment facilities. An outlet 42 is provided on the side of the aquatic plant area 40 away from the drawer-type ecological bed 30 to discharge the purified water into the river.

[0043] The aeration device 50 includes an air chamber 51 located in the center of the drawer-type ecological bed 30, an air pump 52 located on the air chamber 51, a pressure relief and air lift valve 53 located on the air chamber 51, two nano-aeration discs 54 located in the primary filtration zone 20 and the aquatic plant zone 40 respectively, and multiple air pipes 55 connecting the air pump 52, the pressure relief and air lift valve 53 and the nano-aeration discs 54.

[0044] The air chamber 51 can be a sealed compartment for housing the air pump 52 and connecting it to the air pipe 55. A gas flow meter can also be installed on the side wall of the air chamber 51 to detect the gas flow rate in the pipeline. The air pump 52 is fixed inside the air chamber 51, and its inlet end is connected to an air source or to the outside of the equipment via the pressure relief valve 53 to supply air to the air-lift device 34 and the nano-aeration discs 54. The pressure relief valve 53 is located on the air inlet pipe of the air pump 52, and can be fixed to the side wall of the air chamber 51 to control the air intake. The two nano-aeration discs 54 are respectively located at the bottom of the primary filtration zone 20 and the aquatic plant zone 40 to aerate the primary filtration zone 20 and the aquatic plant zone 40 respectively. The air pipe 55 connects the air pump 52 to the pressure relief airlift valve 53, the airlift device 34, and the nano-aeration disc 54, respectively. The airlift device 34 and the nano-aeration disc 54 can be connected in parallel and controlled by pressure relief valves. The aforementioned components are existing technologies widely used in wastewater treatment technology and are well-known to those skilled in the art. However, they are not the main content of this application; therefore, only a brief description of their functions is provided here.

[0045] By setting up the aeration device 50, the dissolved oxygen concentration and airlift return flow rate in the primary filtration zone 20 and the aquatic plant zone 40 can be freely controlled. Under normal circumstances, the dissolved oxygen concentration in the primary filtration zone 20 is 0.5 mg / L to 1 mg / L, and the dissolved oxygen concentration in the aquatic plant zone 40 is 2 mg / L to 5 mg / L.

[0046] In this embodiment, during installation, a comprehensive and detailed inspection of the equipment is first conducted, especially the anti-seepage rubber gaskets at the joints. Both the outer shell 11 and the outer shell of the drawer-type ecological bed 30 require an anti-seepage test. River water can be used for the test, and the test pressure is the design pressure. No seepage within 30 minutes is considered acceptable. Once the equipment passes inspection, it can be transported to the outlet. The main equipment shell is slowly filled with water to sink it. After the shell sinks to the bottom, a water pump is used to remove the accumulated water in the middle. During the pumping process, clay or mortar can be used to backfill the pores. After carefully cleaning and leveling the foundation, a geomembrane is installed in the primary filtration area 20 of the main equipment to ensure no leakage at the outlet. Then, under dry operating conditions, the other components of the main equipment (except for the combined elastic filler) are assembled and adjusted as a whole. After adjustment, the outer shell 11 is filled with a medium, mainly river water, and the inner shell 12 is filled with a carrier, mainly porous filler such as polyurethane sponge. After the main equipment is installed, the drawer-type ecological bed 30 can be installed. First, install the ecological compartments 31, especially the connecting components 33. Then, install and fill the ecological drawers 32, ensuring the filler is filled in layers. Finally, install and adjust the aeration device 50, and then install and adjust the combined filler. At this point, the equipment is basically installed and ready for commissioning and trial operation.

[0047] Compared with existing technologies, the water-filled drawer-type micro-discharge outlet ecological purification system provided by this utility model, through the outer shell 11, adopts an internal hollow waterproof structure, which can be counterweighted by water injection to control the floating and sinking of the equipment in the river, facilitating the installation and disassembly of the equipment. The primary filtration zone 20, filled with water treatment packing, performs preliminary treatment of sewage. The drawer-type ecological bed 30, using multi-layered packing and an internal air-lift device 34 for reflux, allows water to flow from upstream to downstream, achieving multi-step purification from top to bottom. This ensures comprehensive purification of water quality through the combined action of multiple packing materials. Simultaneously, the ecological drawer 32 can be removed from the ecological compartment 31 at any time for cleaning, desorption, or replacement of ineffective packing materials, making maintenance convenient and operation simple. It is applicable to different river environments, has strong adaptability, can be adapted to local conditions, utilizes local materials, and is easy to promote. Finally, the aquatic plant zone 40 further purifies the sewage through the biological action of ecological plants, without the use of chemicals, effectively maintaining the healthy ecology of the water body.

[0048] The above are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Any modifications, equivalent substitutions or improvements within the spirit of the present utility model are covered within the scope of the claims of the present utility model.

Claims

1. A water-filled drawer-type small and micro-pore ecological purification system, characterized in that: The water-filled drawer-type micro-outlet ecological purification system includes a main unit, an upstream primary filtration zone within the main unit, a drawer-type ecological bed in the central area of ​​the main unit, and an aquatic plant zone downstream of the main unit. The main unit has a double-layer structure, including an outer shell and an inner shell. The primary filtration zone includes a seepage-proof layer at its bottom and a filling layer within its interior space. The drawer-type ecological bed has a lower sidewall height near the primary filtration zone than the sidewall height near the aquatic plant zone. The drawer-type ecological bed includes an ecological compartment between the primary filtration zone and the aquatic plant zone, multiple ecological drawers within the ecological compartment, multiple connecting components between the ecological compartment and the ecological drawers, and multiple air-lift devices within the ecological drawers. The ecological compartment is located in the center of the main unit, with both ends abutting against the inner wall of the outer shell. The ecological compartments are made of waterproof material and contain multiple small, spaced-apart compartments. Each compartment has multiple permeable holes on its side wall near the primary filtration area. Each ecological drawer is a rectangular box-shaped structure made of waterproof material, with densely packed perforations on its side wall near the primary filtration area. An air-lift device is installed in each ecological drawer, including an air guide pipe and a water guide pipe. The air inlet of the air guide pipe passes through the side wall of the ecological drawer near the primary filtration area and is connected to an air source. The ecological drawer is located near the top of the aforementioned ecological plant layer. The air outlet of the air guide pipe is located near the bottom of the ecological drawer near the aforementioned zeolite layer. The air guide pipe extends vertically downward from the ecological plant layer to the zeolite layer of the ecological drawer. The water inlet of the water guide pipe is located on the side of the air outlet of the air guide pipe. The water outlet of the water guide pipe passes through the side wall of the ecological drawer near the aquatic plant area and is located near the top of the ecological drawer near the aforementioned ecological plant layer. A water outlet is provided on the side of the aquatic plant area away from the drawer-type ecological bed.

2. The water-filled drawer-type micro-outlet ecological purification system as described in claim 1, characterized in that: The water-filled drawer-type micro-discharge outlet ecological purification system also includes an aeration device installed inside the main equipment.

3. The water-filled drawer-type micro-outlet ecological purification system as described in claim 1, characterized in that: The outer shell is a hollow structure filled with a medium. The inner shell uses a grid-type liner with a sieve structure and is filled with a carrier.

4. The water-filled drawer-type mini-micro orifice ecological purification system according to claim 1, characterized in that: A water inlet is also provided on the side of the primary filtration zone away from the drawer-type ecological bed. The water inlet includes a lifting gate on the outer shell and a debris barrier on one side of the lifting gate. The lifting gate is equipped with a lifting guide rail and a seepage-proof rubber liner. The debris barrier is located on the side of the lifting gate near the primary filtration zone and is spaced apart from the lifting gate by a predetermined distance.

5. The water-filled drawer-type mini-micro orifice ecological purification system according to claim 1, characterized in that: The impermeable layer is made of impermeable geomembrane, and the filling layer is made of combined elastic filler.

6. The water-filled drawer-type micro-outlet ecological purification system as described in claim 1, characterized in that: The ecological drawer is arranged from bottom to top as follows: zeolite layer, multifunctional filler layer, volcanic rock layer, irregular activated carbon layer, and ecological plant layer.

7. The water-filled drawer-type micro-outlet ecological purification system as described in claim 6, characterized in that: The volume ratio of the zeolite layer to the multifunctional filler layer, the volcanic rock layer, and the ecological plant layer is 1:1 to 1:2, and the volume ratio of the zeolite layer to the irregular activated carbon layer is 1:1 to 1:

3.

8. The water-filled drawer-type micro-outlet ecological purification system as described in claim 1, characterized in that: Each of the connecting components includes a sliding rail disposed on the ecological compartment and a roller disposed on the ecological drawer. The sliding rail is fixed to the side of the ecological compartment near the ecological drawer, and the roller is fixed to the outer wall of the ecological drawer near the ecological compartment. The sliding rail and the roller are positioned correspondingly. The sliding rail extends vertically from the bottom of the river to the water surface, and the circumferential direction of the roller is consistent with the extension direction of the sliding rail.

9. The water-filled drawer-type mini-micro orifice ecological purification system according to claim 1, characterized in that: The aquatic plant area is cultivated with pollution-tolerant ecological plants, including one or more of cattails, water spinach, and reeds.

10. The water-filled drawer-type mini-micro orifice ecological purification system according to claim 2, characterized in that: The aeration device includes an air chamber located in the center of the drawer-type ecological bed, an air pump located on the air chamber, a pressure relief and air lift valve located on the air chamber, two nano-aeration discs located in the primary filtration zone and the aquatic plant zone respectively, and multiple air pipes connecting the air pump, the pressure relief and air lift valve and the nano-aeration discs.

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