Micro-polluted water treatment coupling device

Abstract

The invention belongs to the technical field of municipal engineering, and particularly discloses a micro-polluted water treatment coupling device which comprises a pond body, a front area, a wetland area and an ecological pond are arranged in the pond body, the front area comprises a water distribution plate, a gravel layer and a biological filler layer, and overflowing holes are formed in the water distribution plate; a first water distribution baffle is arranged between the gravel layer and the biological filler layer; a first overflow baffle is arranged on one side, away from the gravel layer, of the biological filler layer; the humid area comprises a filler area, and a second water distribution baffle and a third water distribution baffle are arranged on the two sides of the filler area respectively; a second overflow baffle is arranged on the side, facing the humid area, of the ecological pond, the bottom of the second overflow baffle is connected with the bottom of the pond body, and the top end of the second overflow baffle is located below the water surface of the pond body. The device has the characteristics of low construction cost, low operation cost, good hydraulic impact resistance, difficulty in blockage, good denitrification effect, stable effluent and the like, and can reduce the concentration of pollutants in the micro-polluted water body, improve the effluent index and reduce the pollution input of the converged water body.

Description

Technical Field

[0001] The invention relates to the technical field of municipal engineering, and in particular to a coupling device for treating micro-polluted water. Background Art

[0002] Slightly polluted water generally refers to water that is better than the discharge standard of urban sewage treatment plants, and one or several indicators are worse than the surface water standard. Common examples include effluent from urban sewage treatment plants and slightly polluted river and lake water bodies. The concentrations of organic matter, ammonia nitrogen and nitrite nitrogen in slightly polluted water sources are generally very low, and their biodegradability is poor. Direct discharge of slightly polluted water such as urban sewage treatment plants will input pollutants such as nitrogen and phosphorus into the receiving water bodies, which can easily cause eutrophication of the water bodies and affect the water quality of rivers and lakes. Therefore, it is necessary to deeply treat slightly polluted water to reduce the impact on the receiving water bodies.

[0003] Deep treatment of micro-polluted water is to carry out deep treatment after conventional treatment process, and strengthen the removal of dissolved organic pollutants, nitrates, trace chemicals, phosphates, etc. to improve the effluent quality. At present, the most widely used deep treatment technologies for micro-polluted water are mainly physical methods and ecological restoration technologies. Physical methods include activated carbon adsorption technology, biological activated carbon technology, membrane filtration technology, ozone oxidation technology, ozone-biological activated carbon technology and various advanced oxidation combined technologies. Through physical methods such as filtration and adsorption, nitrates and organic matter in water bodies are removed. It has the characteristics of good effluent quality, safety and reliability, but there are shortcomings such as high construction cost, high operating cost, small processing capacity, and complex operation and management. Ecological restoration technology includes artificial wetland technology and water ecological restoration technology. Through the biological characteristics of plants and fillers such as absorption and adsorption, it degrades organic matter, nitrogen and phosphorus in water bodies. It has the characteristics of large processing capacity, low operating cost, and low construction cost, but there are shortcomings such as unstable treatment effect, easy clogging of wetlands, and great impact.

[0004] Based on the existing deficiencies of micro-polluted water deep treatment technology, the present invention proposes a micro-polluted water treatment coupling device. Summary of the invention

[0005] The invention provides a coupling device for treating micro-polluted water, aiming to provide a coupling technology for deeply treating micro-polluted water and overcome the shortcomings of the prior art.

[0006] The present invention organically integrates filler physical adsorption, iron-carbon micro-electrolysis and artificial wetland technology through a coupling device composed of a pre-area, a wetland area and an ecological pond, forming a coupled treatment process of biodegradation, chemical oxidation and physical adsorption, and efficiently treats COD, total nitrogen and total phosphorus in micro-polluted water, making up for the shortcomings of existing traditional treatment processes, and has the characteristics of good effluent water quality, low operating cost, low construction cost, simple operation and management, good impact resistance, and not easy to clog. And a micro-polluted water treatment coupling device of the present invention can deeply treat micro-polluted water, improve effluent indicators, and reduce the input of nitrogen and phosphorus pollution into the water body.

[0007] The present invention is implemented by the following technical scheme: a micro-polluted water treatment coupling device, comprising a pool body, wherein a pre-placement area, a wetland area and an ecological pond are sequentially distributed in the pool body, wherein the pre-placement area comprises a water distribution plate, a gravel layer and a biological filler layer, wherein the water distribution plate is located on one side of the gravel layer, and a flow hole is provided on the water distribution plate;

[0008] A first water distribution baffle is provided between the gravel layer and the biological filler layer, the top of the first water distribution baffle is connected to the top of the pool body, a through-hole channel is provided at the bottom of the first water distribution baffle, and water from the gravel layer enters the bottom of the biological filler layer through the through-hole channel at the bottom of the first water distribution baffle; a first overflow baffle is provided on the side of the biological filler layer away from the gravel layer, the bottom of the first overflow baffle is connected to the bottom of the pool body, and the top of the first overflow baffle is located below the water surface of the pool body;

[0009] The wet area includes a filling area, and a second water distribution baffle and a third water distribution baffle are respectively provided on both sides of the filling area, and the tops of the second water distribution baffle and the third water distribution baffle are connected to the top of the pool body; through holes are opened at the bottom of the second water distribution baffle and the third water distribution baffle; there is a gap between the second water distribution baffle and the first overflow baffle;

[0010] A second overflow baffle is provided on the side of the ecological pond facing the wetland area, the bottom of the second overflow baffle is connected to the bottom of the pool body, the top of the second overflow baffle is located below the water surface of the pool body, and there is a gap between the second overflow baffle and the third water distribution baffle.

[0011] Further, a partition plate is provided in the packing layer, the bottom of the partition plate is connected to the bottom of the pool body, and the top of the partition plate is lower than the tops of the second water distribution baffle and the third water distribution baffle; the partition plate divides the packing layer into a left packing layer and a right packing layer, and the left packing layer includes a lower left packing layer, a left middle packing layer and an upper left packing layer from top to bottom, the lower left packing layer is an iron filings layer, the left middle packing layer is a sawdust layer, and the upper left packing layer is a planting soil layer;

[0012] The right filling layer includes a lower right filling layer and an upper right filling layer from bottom to top, the lower right filling layer is a crushed stone layer, and the upper right filling layer is a fine sand layer.

[0013] Furthermore, the ecological pond includes a shallow water area and a submerged water area, the shallow water area is planted with emergent plants, and the submerged water area is planted with submerged plants.

[0014] Furthermore, a water inlet pipe and a water outlet pipe are respectively installed on both sides of the pool body, and the water inlet pipe is located above the water outlet pipe.

[0015] Furthermore, the water distribution plate is located on the inner side of the pool body, and the water distribution plate and the water inlet pipe are located on the same side, and there is a gap between the water distribution plate and the pool body to form a water storage space.

[0016] Furthermore, the water distribution plate has a plurality of flow holes, and the plurality of flow holes are distributed in a rectangular array.

[0017] Furthermore, the gravel layer is composed of a plurality of gravel modules, each of which comprises a gravel filler and a mesh cage, wherein the gravel filler is located inside the mesh cage.

[0018] Furthermore, the biological filler layer includes an activated carbon fiber filler and a filler support, the activated carbon fiber filler is suspended on the filler support, and two ends of the filler support are respectively connected to the first water distribution baffle and the first overflow baffle.

[0019] Furthermore, the activated carbon fiber filler comprises an upper filler layer and a lower filler layer, the upper filler layer is an activated carbon fiber elastic filler, and the lower filler layer is an activated carbon fiber soft filler.

[0020] Furthermore, the cross-section of the ecological pond is trapezoidal, the side slopes on both sides of the ecological pond are fill structures, and the bottom of the ecological pond is paved with planting soil.

[0021] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0022] By adopting the above-mentioned micro-polluted water treatment coupling device, through the coupling process of the front area, wetland area and ecological pond, it not only has the characteristics of low construction cost and low operation cost, but also can perform physical adsorption, electrochemical decomposition, biological absorption and multi-path degradation treatment on COD, total nitrogen and total phosphorus in micro-polluted water, wherein the water distribution plate in the front area is distributed with flow holes, and the flow holes are distributed in a rectangular array, thereby forming an equidistant distribution form, and the setting of multiple flow holes effectively reduces the water inlet flow rate and has strong resistance to hydraulic shock;

[0023] The gravel filler in the gravel layer has a good adsorption effect on suspended matter in the incoming water, and the gaps between the fillers provide a habitat for microorganisms to form an aerobic biofilm; the activated carbon fiber filler in the biological filler layer further removes suspended matter and COD, greatly reducing the blockage problem in the filler area and ecological pond area.

[0024] The iron chips and sawdust layers in the left filler layer in the wetland area not only form an anoxic environment and promote the denitrification reaction, but also form an iron-carbon micro-electrolysis electrochemical reaction system with the sawdust, which decomposes the difficult-to-degrade organic matter in the influent into degradable small-molecule organic matter, providing a carbon source for denitrification and phosphorus removal, which is beneficial to the denitrification reaction. The gravel layer and fine sand layer in the right filler layer have relatively large porosity and better reoxygenation effect. The filler in the entire wetland area forms an anoxic-aerobic environment, which further removes nitrogen and phosphorus in micro-polluted water.

[0025] The ecological pond is divided into two parts: shallow water area and submerged area. The shallow water area is planted with emergent plants, while the submerged area is planted with submerged plants, forming a clear water ecosystem. The nitrogen and phosphorus in the incoming water are removed through the absorption of aquatic plants and the food chain, forming a long-term mechanism for water quality assurance and ensuring stable effluent quality.

[0026] A coupling device for treating micro-polluted water The coupling device for treating micro-polluted water in the present invention forms a multi-stage purification system for micro-polluted water through the organic coupling of three functional zones: the front zone, the wetland zone and the ecological pond zone, and deeply treats the COD, total nitrogen and total phosphorus in the micro-polluted water, reduces the pollution input to the receiving water body, and even makes the effluent water quality better than the receiving water body. The gravel layer in the front zone of the coupling device for treating micro-polluted water has a good adsorption and filtration effect on suspended matter in the incoming water, reduces the flow rate of the incoming water, and has strong resistance to hydraulic shock; the activated carbon fiber filler in the biological filler layer in the front zone provides a habitat for microorganisms on the one hand, forming an aerobic biofilm to degrade pollutants, and on the other hand, it has a good adsorption effect itself, and can adsorb and remove suspended matter and insoluble organic matter, reducing the impact on subsequent processes and reducing blockage during the operation of the device.

[0027] The wetland area is the core area for nitrogen and phosphorus removal. Through the setting of different wetland fillers, an anoxic-aerobic environment is formed. The iron chips and wood chips in the filler layer form an iron-carbon micro-electrolysis environment, which degrades difficult-to-degrade organic matter into biodegradable small molecular organic matter, promotes the denitrification reaction, and treats the total nitrogen and total phosphorus in the water.

[0028] The ecological pond area utilizes the ecological characteristics of aquatic plants and forms a steady-state underwater ecosystem based on food chains and food webs to absorb, adsorb, transform and remove pollutants in the water, ensuring stable effluent quality.

[0029] The micro-polluted water treatment coupling device of the present invention uses a combination of multiple ecological processes to degrade, purify and remove pollutants in micro-polluted water in multiple ways such as biological and chemical methods. It not only has the characteristics of low construction cost and low operation cost, but also has strong resistance to hydraulic shock, stable effluent, good denitrification effect, and is not easy to be blocked. The effluent can even reach Class III and above of surface water, thereby reducing the pollution input to the water body. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0031] Figure 1 A side view of an embodiment of a coupling device for treating micro-polluted water according to the present invention;

[0032] Figure 2 A plan view of an embodiment of a micro-polluted water treatment coupling device of the present invention;

[0033] Figure 3 It is a three-dimensional diagram of a mesh cage in an embodiment of a coupling device for treating micro-polluted water according to the present invention.

[0034] Marks and corresponding parts names in the attached drawings:

[0035] Pool body 1, water inlet pipe 2, water outlet pipe 3, water distribution plate 4, gravel layer 5, turf 6, first water distribution baffle 70, second water distribution baffle 71, third water distribution baffle 72, filler bracket 8, activated carbon fiber filler 9, first overflow baffle 100, second overflow baffle 101, wetland plants 11, planting soil layer 12, wood chip layer 13, iron chip layer 14, partition plate 15, fine sand layer 16, gravel layer 17, emergent plants 18, submerged plants 19, and planting soil 20. DETAILED DESCRIPTION

[0036] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0037] Example

[0038] like Figure 1-Figure 2 As shown, this embodiment provides a micro-polluted water treatment coupling device, including a pool body 1, in which a pre-area, a wetland area and an ecological pond are sequentially distributed. In this embodiment, the pool body 1 is a rectangular structure, the length of the pool body 1 is 20-30m, the width is 3-4m, and the height is 1.5-2m. The pool body 1 is a concrete or earth cofferdam, and the structural thickness of the pool body 1 is 0.2-0.3m.

[0039] An inlet pipe 2 and an outlet pipe 3 are installed on both sides of the pool body 1, and the inlet pipe 2 is located above the outlet pipe 3. Specifically: the diameter of the inlet pipe 2 is 0.3-0.5m, the center of the inlet pipe 2 is about 0.2m away from the top of the pool body 1, and the material is UPVC, stainless steel or cast iron; the diameter of the outlet pipe 3 is 0.3-0.5m, the center of the outlet pipe 3 is about 0.5m away from the top of the pool body 1, and the material is UPVC, stainless steel or cast iron.

[0040] The front area includes a water distribution plate 4, a gravel layer 5 and a biological filler layer. The water distribution plate 4 is located on one side of the gravel layer 5, and a flow hole is opened on the water distribution plate 4. In this embodiment, the water distribution plate 4 is located on the inner side of the pool body 1, and the water distribution plate 4 and the water inlet pipe 2 are located on the same side. There is a distance between the water distribution plate 4 and the pool body 1 to form a water storage space, so that the water entering from the water inlet pipe 2 will first be located in the water storage space between the water distribution plate 4 and the pool body 1. In this embodiment, the distance between the water distribution plate 4 and the pool body 1 is 0.3-0.5m.

[0041] There are multiple flow holes on the water distribution plate 4, and the multiple flow holes are distributed in a rectangular array, so that the multiple flow holes are distributed at equal intervals, which can reduce the flow rate of the incoming water. The incoming water after the flow rate is reduced enters the gravel layer 5. In this embodiment, the diameter of the flow holes is 40-60mm, the hole spacing is 0.2-0.3m, and they are distributed in rows horizontally, with a row spacing of 0.3-0.5m.

[0042] A first water distribution baffle 70 is provided between the gravel layer 5 and the biological filler layer. The top of the first water distribution baffle 70 is connected to the top of the tank body 1. The lower part of the first water distribution baffle 70 has a through hole channel. In this embodiment, the bottom of the first water distribution baffle 70 is located above the bottom of the tank body 1, so that a through hole channel is formed between the first water distribution baffle 70 and the bottom of the tank body 1. In this embodiment, the bottom of the first water distribution baffle 70 is 0.5m away from the bottom of the tank body 1. In this embodiment, the material of the first water distribution baffle 70 is a steel structure or a concrete structure. In another embodiment, the bottom of the first water distribution baffle 70 can be connected to the bottom of the tank body 1, and a through hole is opened at the lower part of the first water distribution baffle 70 to form a through hole channel, so that the water out of the gravel layer 5 can flow into the biological filler layer through the through hole channel.

[0043] The water entering the water distribution plate 4 after being decelerated through the flow holes enters the gravel layer 5 and then flows out from the gravel layer 5 . The water flowing out of the gravel layer 5 enters the bottom of the biological filler layer through the through-hole channel at the bottom of the first water distribution baffle 70 .

[0044] In this embodiment, the gravel layer 5 is composed of a plurality of gravel modules. Figure 3As shown, the gravel module includes a gravel filler and a mesh cage. The gravel filler is located in the mesh cage. The mesh aperture of the mesh cage is 50-100 mm. The gravel filler is composed of multiple gravels of different particle sizes. The particle size of the gravel is 60-150 mm. The mesh cage is twisted by steel wires, steel strands, etc. In this embodiment, turf 6 is planted on the top of the gravel layer 5. The turf 6 is a common variety such as bermudagrass. The gravel has a certain purification effect on the suspended matter in the influent water, and can also reduce the influent flow rate and reduce the impact on the subsequent treatment unit. The gaps between the gravels in the gravel layer 5 can provide a habitat for microorganisms to form a biofilm.

[0045] A first overflow baffle 100 is provided on one side of the biological filler layer away from the gravel layer 5 . The bottom of the first overflow baffle 100 is connected to the bottom of the pool body 1 , and the top of the first overflow baffle 100 is located 0.2 m below the water surface of the pool body 1 .

[0046] The biological filler layer includes an activated carbon fiber filler 9 and a filler support 8. The activated carbon fiber filler 9 is suspended on the filler support 8. The two ends of the filler support 8 are respectively connected to the first water distribution baffle 70 and the first overflow baffle 100. The activated carbon fiber filler 9 has the characteristics of large bottom area and large biomass. Under the action of the activated carbon fiber filler 9, the suspended matter and COD in the influent are further purified and removed, reducing the influence of the suspended matter on the subsequent units.

[0047] The filler support 8 is divided into two layers, the upper filler support 8 is about 0.8m away from the top of the pool body 1, and the lower filler support 8 is about 0.5m away from the bottom of the pool body 1.

[0048] In another embodiment, the activated carbon fiber filler 9 is a multi-layer composite filler. In this embodiment, the activated carbon fiber filler 9 includes an upper filler layer and a lower filler layer. The upper filler layer is an activated carbon fiber elastic filler, and the length of the filler is 40-60mm. The lower filler layer is an activated carbon fiber soft filler, and the diameter of the filler is 120-150mm.

[0049] The wet area includes a filling area, and a second water distribution baffle 71 and a third water distribution baffle 72 are respectively provided on both sides of the filling area, and the tops of the second water distribution baffle 71 and the third water distribution baffle 72 are connected to the top of the pool body 1; the lower parts of the second water distribution baffle 71 and the third water distribution baffle 72 have through-hole channels; the second water distribution baffle 71 and the third water distribution baffle 72 are consistent with the setting of the first water distribution baffle 70, and the through-hole channels at the lower parts of the second water distribution baffle 71 and the third water distribution baffle 72 are consistent with the through-hole channels at the lower part of the first water distribution baffle 70, and there are also two setting methods, which will not be repeated here.

[0050] There is a gap between the second water distribution baffle 71 and the first overflow baffle 100, so that water from the biological filler layer can flow into the space between the second water distribution baffle 71 and the first overflow baffle 100, and then enter the wet area from the through hole channel at the bottom of the second water distribution baffle 71.

[0051] In this embodiment, a partition plate 15 is provided in the packing layer, the bottom of the partition plate 15 is connected to the bottom of the pool body 1, and the top of the partition plate 15 is lower than the top of the second water distribution baffle 71 and the third water distribution baffle 72; the partition plate 15 divides the packing layer into two parts, a left packing layer and a right packing layer, wherein the water flow direction of the left packing layer close to the second water distribution baffle 71 is from bottom to top, and the upper water flows through the partition plate 15 from top to bottom through the right packing layer.

[0052] In this embodiment, the left packing layer includes a lower left packing layer, a left middle packing layer and an upper left packing layer from top to bottom. The lower left packing layer is an iron chip layer 14. The iron chip layer 14 is an iron chip filler. The iron chip is cut from iron processing waste. The filler porosity is 0.4-0.6.

[0053] The left middle filler layer is a sawdust layer 13, which is a sawdust filler. The sawdust is cut from common wood processing waste, and the porosity of the sawdust filler is 0.5-0.6;

[0054] The upper left filling layer is a planting soil layer 12, on the top of which wetland plants 11 are planted. The soil porosity of the planting soil layer 12 is 0.3-0.4. The species of wetland plants 11 are common local species such as calamus and canna, with a planting density of 9-16 plants / m 2 ;

[0055] The right packing layer includes a lower right packing layer and an upper right packing layer from bottom to top. The lower right packing layer is a crushed stone layer 17. The crushed stone layer 17 is a crushed stone packing. The packing particle size is 10-50 mm and the porosity is 0.4-0.5.

[0056] The upper right filler layer is a fine sand layer 16, and the fine sand layer 16 is a fine sand filler, the filler particle size is 5-10mm, and the porosity is 0.3-0.4.

[0057] The iron filings layer 14 and sawdust layer 13 in the left packing layer in the wet area can form an anoxic environment on the one hand, which has a certain effect on removing total nitrogen in the influent water, and on the other hand, can form iron-carbon micro-electrolysis, which can decompose the difficult-to-degrade organic matter in the influent water into small molecular degradable organic matter, thereby increasing the denitrification effect; the right packing layer is a gravel layer 17 and a fine sand layer 16, which have a relatively large porosity and can form an aerobic environment, which is conducive to the removal of phosphorus in the influent water. The effluent from the packing area passes through the overflow baffle, and the left and right parts of the packing area form an anaerobic and aerobic environment, realizing the denitrification and phosphorus removal treatment of the influent water, and improving the effluent water quality.

[0058] In this embodiment, a second overflow baffle 101 is provided on the side of the ecological pond facing the wetland area. The bottom of the second overflow baffle 101 is connected to the bottom of the pool body 1, and the top of the second overflow baffle 101 is located 0.2m below the water surface of the pool body 1. There is a gap between the second overflow baffle 101 and the third water distribution baffle 72, thereby leaving a water storage space, and the installation height of the outlet pipe 3 is lower than the top of the second overflow baffle 101.

[0059] The cross section of the ecological pond is trapezoidal, and the side slopes on both sides of the ecological pond are fill structures with a slope of 1:2-1:5 and a water depth of 0-1.5m; the bottom of the ecological pond is paved with planting soil 20 with a thickness of 0.3-0.5m.

[0060] The ecological pond includes a shallow water area and a submerged water area. The shallow water area is distributed at a water depth of 0-0.5m, and the submerged water area is distributed at a water depth of 0.5-1.5m. Emergent plants 18 are planted in the shallow water area, and submerged plants 19 are planted in the submerged water area, forming a benign water ecosystem. Nitrogen and phosphorus in the incoming water are removed through absorption by aquatic plants and food chains, thereby increasing the environmental capacity of the receiving water body.

[0061] In this embodiment, the water depth of the emergent plants 18 is 0-0.5m, and they are planted along the slope of the ecological pond. The species of the emergent plants 18 are common local species such as calamus and canna, and the planting density is 16-25 plants / m 2 ;

[0062] The planting depth of submerged plants 19 ranges from 0.5 to 1.5 m, and the planting species are common native species such as Vallisneria serrata and Potamogeton serrata, with a planting density of 80 to 120 plants / m2;

[0063] The specific implementation process is as follows:

[0064] In order to implement the technical solution of the present invention, specific embodiments are provided below for illustration.

[0065] The tailwater of a sewage treatment plant meets the Class A standard of urban sewage discharge, and requires the addition of deep treatment technology, and the effluent meets the Class IV standard of surface water. The designed daily water treatment volume is 200m 3 The total nitrogen content in the influent is high, and the total phosphorus and COD are higher than the surface water standards.

[0066] The effluent from the sewage treatment plant is treated by a multi-stage coupled wetland purification device. After passing through the gravel layer 5 in the pre-area, the suspended solids are reduced to below 5 mg / l. After passing through the biological filler layer, the effluent COD is reduced by 10%, and the suspended solids are 2-3 mg / l. After passing through the wetland area, the total nitrogen is reduced to 4-5 mg / l, the total phosphorus is reduced to 0.5 mg / l, and the COD is reduced to 30 mg / l. After passing through the ecological pond, the effluent COD is reduced to 20 mg / l, the total nitrogen is reduced to 1.0 mg / l, and the total phosphorus is 0.02 mg / l. The effluent water quality is basically stable and reaches Class III surface water. There is basically no blockage of the filler during operation, and the operation and management are convenient.

[0067] It should be noted that the above description of the disclosed embodiments enables professionals and technicians in the field to implement or use the present application. Various modifications to these embodiments will be apparent to professionals and technicians in the field, and the general principles defined herein can be implemented in other embodiments without departing from the scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features disclosed herein.

[0068] In the description of the present invention, it should be noted that the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0069] In the description of this document, terms such as "up", "down", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", and "longitudinal" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only used to illustrate the relative positional relationships between the various components or components, and do not particularly limit the specific installation orientations of the various components or components.

[0070] In the description of this document, some terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances.

[0071] In the description of this document, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0072] The structures, proportions, sizes, etc. drawn in the drawings in this application are only used to match the contents disclosed in this technical briefing book for technical personnel in this field to understand and read, and are not used to limit the restrictive conditions for the implementation of this application. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application.

[0073] The terms used in this document are those common terms currently widely used in the art in consideration of the functions of the present disclosure, but these terms may vary according to the intention of a person of ordinary skill in the art, precedents, or new technologies in the art. In addition, specific terms may be selected by the applicant, and in this case, their detailed meanings will be described in the detailed description of the present disclosure. Therefore, the terms used in the document should not be understood as simple names, but rather as an overall description based on the meaning of the terms and the present disclosure.

[0074] Flowcharts or text are used in this document to illustrate the operating steps performed according to the embodiments of the present application. It should be understood that the operating steps in the embodiments of the present application are not necessarily accurately performed in the order of recording. On the contrary, various steps can be processed in reverse order or simultaneously as needed. At the same time, other operations can also be added to these processes, or a certain step or several steps can be removed from these processes.

[0075] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A micro-polluted water treatment coupling device, comprising a tank body, characterized in that: The pool body is sequentially provided with a front area, a wetland area and an ecological pond, wherein the front area includes a water distribution plate, a gravel layer and a biological filler layer, the water distribution plate is located on one side of the gravel layer, and a flow hole is provided on the water distribution plate; A first water distribution baffle is provided between the gravel layer and the biological filler layer, the top of the first water distribution baffle is connected to the top of the pool body, the lower part of the first water distribution baffle has a through hole channel, and the water from the gravel layer enters the bottom of the biological filler layer through the through hole channel at the bottom of the first water distribution baffle; a first overflow baffle is provided on the side of the biological filler layer away from the gravel layer, the bottom of the first overflow baffle is connected to the bottom of the pool body, and the top of the first overflow baffle is located below the water surface of the pool body; The wet area includes a packing area, and a second water distribution baffle and a third water distribution baffle are respectively provided on both sides of the packing area, and the tops of the second water distribution baffle and the third water distribution baffle are connected to the top of the pool body; the lower parts of the second water distribution baffle and the third water distribution baffle have through-hole channels; and there is a gap between the second water distribution baffle and the first overflow baffle; A second overflow baffle is provided on the side of the ecological pond facing the wetland area, the bottom of the second overflow baffle is connected to the bottom of the pool body, the top of the second overflow baffle is located below the water surface of the pool body, and there is a gap between the second overflow baffle and the third water distribution baffle.

2. A micro-polluted water treatment coupling device according to claim 1, characterized in that: A partition plate is provided in the packing layer, the bottom of the partition plate is connected to the bottom of the pool body, and the top of the partition plate is lower than the tops of the second water distribution baffle and the third water distribution baffle; the partition plate divides the packing layer into a left packing layer and a right packing layer, and the left packing layer includes a lower left packing layer, a left middle packing layer and an upper left packing layer from top to bottom, the lower left packing layer is an iron filings layer, the left middle packing layer is a sawdust layer, and the upper left packing layer is a planting soil layer; The right filling layer includes a lower right filling layer and an upper right filling layer from bottom to top, the lower right filling layer is a crushed stone layer, and the upper right filling layer is a fine sand layer.

3. A micro-polluted water treatment coupling device according to claim 1, characterized in that: The ecological pond comprises a shallow water area and a submerged water area, wherein emergent plants are planted in the shallow water area and submerged plants are planted in the submerged water area.

4. A micro-polluted water treatment coupling device according to claim 1, characterized in that: A water inlet pipe and a water outlet pipe are respectively installed on both sides of the pool body, and the water inlet pipe is located above the water outlet pipe.

5. A micro-polluted water treatment coupling device according to claim 4, characterized in that: The water distribution plate is located on the inner side of the pool body, and the water distribution plate and the water inlet pipe are located on the same side. There is a distance between the water distribution plate and the pool body to form a water storage space.

6. A micro-polluted water treatment coupling device according to claim 1, characterized in that: The water distribution plate has a plurality of flow holes, and the plurality of flow holes are distributed in a rectangular array.

7. A micro-polluted water treatment coupling device according to claim 1, characterized in that: The gravel layer is composed of a plurality of gravel modules, each of which comprises a gravel filler and a mesh cage, wherein the gravel filler is located inside the mesh cage.

8. A micro-polluted water treatment coupling device according to claim 1, characterized in that: The biological filler layer includes an activated carbon fiber filler and a filler support, the activated carbon fiber filler is suspended on the filler support, and two ends of the filler support are respectively connected to the first water distribution baffle and the first overflow baffle.

9. A micro-polluted water treatment coupling device according to claim 8, characterized in that: The activated carbon fiber filler comprises an upper filler layer and a lower filler layer, the upper filler layer is an activated carbon fiber elastic filler, and the lower filler layer is an activated carbon fiber soft filler.

10. A micro-polluted water treatment coupling device according to claim 1, characterized in that: The cross section of the ecological pond is in a trapezoidal shape, the side slopes on both sides of the ecological pond are fill structures, and the bottom of the ecological pond is paved with planting soil.

Images