A modular artificial wetland water purification system

Abstract

The utility model provides a modular artificial wetland water purification system, which comprises an adsorption sedimentation tank, a water distribution channel, a plurality of modular wetland units and a water collection channel in sequence along the flow direction of sewage; the modular artificial wetland water purification system of the invention solves the problems that the amount of urban tail water is large and the water quality is difficult to meet the surface water environmental quality standards, the wetland ecosystem is degraded and the water purification capacity is low, the ecological landscape pattern is fragmented, and the water ecosystem is fragile in the northern region under low temperature.

Description

Technical Field

[0001] The utility model relates to the field of water environment management, in particular to a modular artificial wetland water purification system. Background Art

[0002] Artificial wetlands are a type of sewage ecological treatment engineering technology developed in recent decades. They organically combine sewage treatment with environmental ecology. While effectively treating sewage, they also beautify the environment, create ecological landscapes, and bring environmental benefits and certain economic benefits. As an ecological water treatment method, artificial wetlands have the advantages of low investment, low operating costs, low energy consumption, and low management requirements compared to traditional water treatment methods. They are widely used in domestic sewage, industrial wastewater, storm runoff, eutrophic water bodies, etc., and have achieved good results. However, artificial wetlands have also exposed many problems in the actual application process, such as being easily affected by climatic conditions and temperature, the matrix is ​​easily saturated and blocked, and is easily affected by plant species. It occupies a large area, has an irregular design, is inefficient, has unreasonable management, and has a single ecological service function. For example, CN107344758G discloses a composite system for treating micro-polluted water in northern winter, including a subsurface flow artificial wetland system, which is a rectangular pool structure with an upper opening. The subsurface flow artificial wetland system is placed in a sunny greenhouse. The subsurface flow artificial wetland system includes a water distribution pool, a wetland system, and a regulating water pool in the pool body in sequence. The water inlet pipeline is connected to the water distribution pool, and the water distribution pool is connected to the wetland system through a water distribution pipe on the top of the water distribution pool. A matrix is ​​provided in the wetland system, and the wetland system is connected to the regulating water pool through a wetland water inlet pipe, and the regulating water pool is connected to the outlet pipeline; and the matrix is ​​zeolite, slag, and gravel from bottom to top. The wetland system in the patent is placed in a separate greenhouse, and because there is no pre-treatment step, the matrix in the wetland system is easily blocked. These problems affect the sewage treatment effect of the artificial wetland to a certain extent, shorten the service life of the artificial wetland, and limit its application.

[0003] Especially in the cold northern regions, due to the influence of low temperature stress, biochemical reactions deteriorate, plant growth stagnates, and microbial activity weakens, making the operation of artificial wetlands unsatisfactory and causing the wetlands to significantly reduce the removal effect of pollutants. Therefore, there is an urgent need for a modular artificial wetland water purification system suitable for the low temperature in the north and with high efficiency to be promoted and applied in the cold northern regions of my country. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the utility model is to provide a modular artificial wetland water purification system to solve the problems that artificial wetlands are easily affected by climate and temperature, easy to be blocked, the water purification capacity of artificial wetlands is easily degraded, and the ecosystem is fragile.

[0005] In order to achieve the above-mentioned purpose and other related purposes, the utility model provides a modular artificial wetland water purification system, which includes an adsorption sedimentation tank, a water distribution channel, a plurality of modular wetland units and a water collection channel in sequence along the sewage flow direction;

[0006] A water outlet pipe is also provided between the adsorption sedimentation tank and the water distribution channel, which is used to connect the adsorption sedimentation tank with the water distribution channel and to guide the sewage treated by the adsorption sedimentation tank into the water distribution channel;

[0007] The water distribution channel is provided with a plurality of water outlet channels, so that the sewage flows to the modular wetland unit through the water outlet channels;

[0008] The modular wetland unit uses a heat-insulating material layer as a frame, a filler layer and a heat-insulating layer are provided in the frame, and the heat-insulating layer is laid on the top of the filler layer. The outlet side of the modular wetland unit is a water-impermeable structure, which is suitable for sewage overflow to the next modular wetland unit or a water collection channel;

[0009] The water collection channel is used to collect treated sewage.

[0010] Preferably, the adsorption sedimentation tank is filled with fillers for adsorption and phosphorus removal.

[0011] Preferably, a first water inlet is provided at the bottom of the side of the adsorption sedimentation tank for connecting to a sewage inlet pipe, a first water outlet is provided at the top of the side of the adsorption sedimentation tank, a second water inlet is provided at the bottom of the water distribution channel, one end of the outlet pipe is connected to the first water outlet, and the other end is connected to the second water inlet.

[0012] Preferably, the water outlet flow channel is also provided with a corresponding water control gate valve for controlling the flow rate of the water outlet flow channel.

[0013] Preferably, a detachable packing column is further arranged between the water distribution channel and the modular wetland unit, the packing column is tightly connected to the modular wetland unit, the water inlet side of the modular wetland unit is a mesh structure, the connecting surface between the packing column and the modular wetland unit is a mesh structure, the water outlet channel is connected to the packing column, and the sewage is evenly distributed through the packing column and enters the modular wetland unit.

[0014] Preferably, a plurality of the modular wetland units are arranged in series and / or in parallel, and a detachable packing column is provided between the modular wetland units arranged in series, and a waterproof partition is provided between the modular wetland units arranged in parallel.

[0015] Preferably, plants are also planted in the modular wetland unit, and the plants are interplanted in cold seasons and warm seasons.

[0016] Preferably, the modular wetland unit is also provided with an automatic microbial flora dosing device for adding bacterial agents to the modular wetland unit.

[0017] Preferably, a second water outlet is provided at the upper end of the outlet side of the modular wetland unit, suitable for sewage to flow from the second water outlet into the next modular wetland unit or the water collection channel.

[0018] Preferably, the height of the outlet side of the water collection channel is not higher than the height of the outlet side of the modular wetland unit.

[0019] As described above, the modular artificial wetland water purification system of the utility model has at least one of the following beneficial effects:

[0020] (1) The modular artificial wetland water purification system of the utility model first sets up an adsorption sedimentation tank, which removes phosphorus at the front end and also ensures the nitrogen reduction effect of the subsequent wetland. Then, the sewage is controlled to flow to the modular wetland unit through the water distribution channel. The insulation material layer frame and the insulation layer of the modular wetland unit can ensure the normal operation of biological activity and wetlands in a low-temperature environment. Combined with the overflow setting on the outlet side of the modular wetland unit, the pollutant removal effect in a low-temperature environment is further guaranteed. Finally, the treated sewage flows into the water collection channel. The modular artificial wetland water purification system of the utility model is suitable for low-temperature environments in the north.

[0021] (2) The present invention also plants plants in the modular wetland unit and sets up an automatic dosing device for microbial flora. The combination of microbial agents and plants forms a "plant-microorganism spatial coupling configuration", which improves the water purification capacity and effectively removes pollutants.

[0022] (3) The present invention also arranges modular wetland units in series and / or in parallel, in series horizontally and in parallel vertically. The operating state of the modular wetland units can be controlled by the outlet flow channel of the water distribution channel, and the operation of the modular wetland units can be regulated according to the difference in seasonal water volume. Furthermore, packing columns that are easy to disassemble or replace can be arranged between each serially connected modular wetland unit, and slow-release oxygen fillers or heat-release fillers can be loaded according to the wetland operation conditions, so as to ensure the operating environment requirements of the wetland module and the pollution removal effect, while ensuring that the modular wetland units are not blocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Shown is a three-dimensional schematic diagram of a modular constructed wetland water purification system.

[0024] Figure 2 Shown is a plan view of a modular constructed wetland water purification system.

[0025] Description of Figure Numbers

[0026] 1 Adsorption sedimentation tank

[0027] 2. Water channel construction

[0028] 3 Modular Wetland Units

[0029] 4. Water collection channel

[0030] 5 Packing column

[0031] 11 Sewage inlet pipe

[0032] 12 Water outlet pipe

[0033] 21 Water control gate valve

[0034] 31 Packing layer

[0035] 32 Insulation layer

[0036] 33. Automatic dosing device for microbial flora

[0037] 34 Watertight partition DETAILED DESCRIPTION

[0038] The following is an explanation of the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0039] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In the description of the present invention, the terms "horizontal", "longitudinal", "upper" and "lower" etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0041] In the description of the present invention, unless otherwise specified, "several" means two / a group or more than two / a group.

[0042] Please see attached Figures 1-2 It should be noted that the illustrations provided in this embodiment are only used to schematically illustrate the basic concept of the utility model, and the drawings only show the components related to the utility model rather than the number, shape and size of the components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0043] The embodiment of the utility model provides a modular artificial wetland water purification system, which includes an adsorption sedimentation tank 1, a water distribution channel 2, a plurality of modular wetland units 3 and a water collection channel 4 in sequence along the flow direction of sewage;

[0044] A water outlet pipe 12 is also provided between the adsorption sedimentation tank 1 and the water distribution channel 2, which is used to connect the adsorption sedimentation tank 1 with the water distribution channel 2 and to guide the sewage treated by the adsorption sedimentation tank 1 into the water distribution channel 2;

[0045] The water distribution channel 2 is provided with a plurality of water outlet channels, so that the sewage flows to the modular wetland unit 3 through the water outlet channels;

[0046] The modular wetland unit 3 uses a heat-insulating material layer as a frame, and a filler layer 31 and a heat-insulating layer 32 are provided in the frame. The heat-insulating layer is laid on the top of the filler layer. The outlet side of the modular wetland unit 3 is a water-impermeable structure, which is suitable for sewage overflow to the next modular wetland unit 3 or the water collection channel 4;

[0047] The water collection channel 4 is used to collect treated sewage.

[0048] In a preferred embodiment, in the modular artificial wetland water purification system shown in the embodiment of the utility model, the tank body of the adsorption sedimentation tank 1 is composed of a heat-insulating material. The heat-insulating material is a material containing components such as waste glass and straw, and also realizes the resource utilization of waste.

[0049] The adsorption sedimentation tank 1 is filled with fillers for adsorption and phosphorus removal. The fillers are new slow-release phosphorus removal fillers that can ensure the removal effect of phosphorus in a low-temperature environment and have a precipitation effect, so that most of the phosphorus can be removed from the adsorption sedimentation tank 1.

[0050] In a preferred embodiment, Figure 1 As shown, in the modular artificial wetland water purification system shown in the embodiment of the utility model, a first water inlet is provided at the bottom of the side of the adsorption sedimentation tank 1, which is used to connect the sewage inlet pipe 11, a first water outlet is provided at the top of the side of the adsorption sedimentation tank 1, and a second water inlet is provided at the bottom of the water distribution channel 2. One end of the outlet pipe 12 is connected to the first water outlet, and the other end is connected to the second water inlet.

[0051] Among them, the sewage in the adsorption sedimentation tank 1 adopts the method of bottom-in and top-out, which can ensure the effective removal of phosphorus.

[0052] The water distribution channel 2 also adopts the method of water inlet from below, which can effectively prevent the disturbance of silt.

[0053] The water distribution channel 2 adopts antifreeze pipes to receive the water from the sedimentation adsorption tank, which can ensure the normal treatment of sewage in low temperature weather.

[0054] In a preferred embodiment, Figures 1-2 As shown, in the modular artificial wetland water purification system shown in the embodiment of the utility model, the outlet flow channel is also provided with a water control gate valve 21 for controlling the flow rate of the outlet flow channel. The water control gate valve 21 can not only control the flow rate of the outlet water, but also control the sewage to flow into the corresponding modular wetland unit 3.

[0055] In a preferred embodiment, Figure 1 As shown, in the modular artificial wetland water purification system shown in the embodiment of the utility model, a detachable packing column 5 is also arranged between the water distribution channel 2 and the modular wetland unit 3, the packing column 5 is tightly connected to the modular wetland unit 3, the water inlet side of the modular wetland unit 3 is a mesh structure, the connecting surface between the packing column 5 and the modular wetland unit 3 is a mesh structure, the outlet channel is connected to the packing column 5, and the sewage enters the modular wetland unit 3 through the packing column 5 evenly distributed water.

[0056] In a preferred embodiment, Figure 2 As shown, in the modular artificial wetland water purification system shown in the embodiment of the utility model, a plurality of the modular wetland units 3 are arranged in series and / or in parallel, and a detachable packing column 4 is also provided between the modular wetland units 3 arranged in series, and a waterproof partition 34 is also provided between the modular wetland units 3 arranged in parallel.

[0057] The filler in the filler column 5 is selected from oxygen-releasing filler or heat-releasing filler. Slow-release oxygen filler or calcium oxide heat-releasing filler can be loaded into the filler column 5 as required to meet the temperature and oxygen environment required by the wetland module and act as a positioning pile.

[0058] The parallel modular wetland units 3 are separated by watertight partitions 34, and the operation state of the parallel wetland modules is controlled by the water control valve 21 of the water distribution channel 2. Finally, the ends of the modular wetland units 3 in each parallel direction are all high-level outlets at the upper end to the water collection channel 4.

[0059] During operation, the modular wetland units 3 that are operated in series or in series and in parallel are controlled by the water control gate valve 21 of the water distribution channel 2; the water discharged from the water distribution channel 2 first enters the packing column 5, and the water is evenly distributed through the packing column 5 to enter the modular wetland unit 3, and a packing column 5 is arranged between every two modular wetland units 3 connected in series. Each modular wetland unit 3 uses the overflow water from the upper end to enter the packing column 5, and the water is evenly distributed through the packing column 5 to enter the next modular wetland unit 3 in series, and finally the water enters the water collection channel 4.

[0060] In a preferred embodiment, Figure 1 As shown, in the modular artificial wetland water purification system shown in the embodiment of the utility model, the modular wetland unit 3 is also provided with a microbial flora automatic dosing device 33 for adding bacterial agents to the modular wetland unit 3. In a preferred embodiment of the utility model, the microbial flora automatic dosing device 33 is arranged near the water inlet side of the modular wetland unit 3. The microbial flora automatic dosing device 33 is provided to construct a wetland microecological environment by adding a bacterial agent carbon source and releasing it into the entire modular wetland unit 3 with the water flow.

[0061] In a preferred embodiment, Figure 1 As shown, in the modular artificial wetland water purification system shown in the embodiment of the utility model, plants are also planted in the modular wetland unit 3, and the plants are cold-resistant plants. Plants combine with microorganisms to play a joint purification role. The wetland plant planting adopts a "cold season + warm season" native plant composite configuration mode to adapt to the growth temperature of each season. Most of the ammonia nitrogen substances are converted into nitrates under the nitrification of the wetland plant root zone and the biofilm system on the filler surface.

[0062] In a preferred embodiment, in the modular artificial wetland water purification system shown in the embodiment of the utility model, a second water outlet is provided at the upper end of the outlet side of the modular wetland unit 3, which is suitable for sewage to flow from the second water outlet into the next modular wetland unit 3 or the collection channel 4.

[0063] Preferably, the height of the outlet side of the water collection channel 4 is not higher than the height of the outlet side of the modular wetland unit 3. When the water level in the water collection channel 4 reaches the highest height of the outlet side, the treated sewage overflows to the external river channel.

[0064] During operation, the entire artificial wetland water purification system is constructed using new materials with thermal insulation properties, which effectively ensures the stable operation of the system and the sewage purification effect under the low temperature climate conditions in the north.

[0065] After the polluted water is collected uniformly, it enters the adsorption sedimentation tank 1 through the sewage inlet pipe 11 through the lower end. The adsorption sedimentation tank 1 is filled with fillers with adsorption and phosphorus removal functions, and most of the phosphorus is removed in this functional area. The effluent from the adsorption sedimentation tank 1 is overflowed to the outlet pipe 12 and connected to the water distribution channel 2. Water enters from the lower end of the water distribution channel 2 to avoid the disturbance and floating of the silt at the bottom of the channel caused by the upper end water inlet, thereby avoiding blockage of the subsequent artificial wetland water purification system, thereby ensuring the stable operation of the system.

[0066] The water distribution channel 2 is connected to the modular wetland unit 3. The front end of the modular wetland unit 3 and any two modular wetland units 3 in series are provided with packing columns 5. The operation state of the modular wetland units 3 in parallel is controlled by the water control gate valve 21 of the water distribution channel 2. The water discharged from the water distribution channel 2 first passes through the packing column 5. The packing column 5 can be selectively filled with oxygen-releasing packing or heat-releasing packing according to the temperature and the actual operation of the wetland; the water discharged from the packing column 5 is used for uniform water distribution of the subsequent modular wetland units 3 in the series direction; the modular wetland units 3 in the parallel direction are separated by impermeable partitions 34, and all the modular wetland units 3 in parallel finally use the upper high water level to discharge water, which effectively prolongs the residence time of pollutants passing through the packing layer 31 and enhances the purification effect. At the same time, a microbial flora automatic dosing device 33 is set in the modular wetland unit 3, and the microbial agent addition is turned on / off and released into the entire modular wetland unit 3 by controlling the switch. A packing layer 31 is arranged inside each modular wetland unit 3 according to the water quality, and an insulation layer 32 is arranged on the top layer of the packing layer 31 to further ensure the survival temperature of the plant root zone and exert the plant root system-microorganism combined purification effect. Finally, all the water outflows of all modular wetland units 3 are collected in the water collection channel 4, and when the water collection channel 4 reaches a certain water level, it flows to the outer river. Under the hardware framework of the utility model, a PLC control system can be installed separately to control the control switch of the microbial flora automatic dosing device 33 and the operation of the water control gate valve 21.

[0067] In summary, the modular artificial wetland water purification system of the utility model is arranged in sequence through the adsorption sedimentation tank 1, the water distribution channel 2, a plurality of modular wetland units 3 and the water collection channel 4, and the modular wetland unit 3 is arranged in series and / or in parallel, so that the operation of the modular wetland unit 3 can be regulated according to the difference in seasonal water volume. Further, the spatial coupling configuration formed by plants and microorganisms in the modular wetland unit 3 can effectively remove pollutants. At the same time, the adsorption sedimentation tank 1 and the water distribution channel 2 both adopt the bottom-in and top-out method, which can effectively prevent the disturbance of the bottom sludge, and the modular wetland unit 3 adopts the overflow water method, which can extend the sewage treatment distance and achieve the purpose of effective purification. The modular artificial wetland water purification system of the utility model purifies sewage by exerting the synergistic phosphorus and nitrogen reduction, algae inhibition and carbon control effects of plants and microorganisms, etc., and solves the problems of large amount of urban tailwater and water quality that is difficult to meet the surface water environmental quality standards under low temperature in northern regions, low water purification capacity of wetland ecosystem degradation, fragmented ecological landscape pattern, and fragile water ecosystem.

[0068] That is, the utility model effectively overcomes various shortcomings in the prior art and has high industrial utilization value.

[0069] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A modular artificial wetland water purification system, characterized in that: The system includes an adsorption sedimentation tank (1), a water distribution channel (2), a plurality of modular wetland units (3) and a water collection channel (4) in sequence along the flow direction of the sewage; A water outlet pipe (12) is also provided between the adsorption sedimentation tank (1) and the water distribution channel (2), which is used to connect the adsorption sedimentation tank (1) with the water distribution channel (2) and to guide the sewage treated by the adsorption sedimentation tank (1) into the water distribution channel (2); The water distribution channel (2) is provided with a plurality of water outlet channels, so that sewage flows to the modular wetland unit (3) through the water outlet channels; the modular wetland unit (3) uses a heat insulation material layer as a frame, and a filler layer (31) and a heat preservation layer (32) are provided in the frame, and the heat preservation layer (32) is laid on the top of the filler layer (31); the water outlet side of the modular wetland unit (3) is a water-impermeable structure, which is suitable for sewage to overflow to the next modular wetland unit (3) or the water collection channel (4); The water collection channel (4) is used to collect treated sewage.

2. The modular artificial wetland water purification system according to claim 1 is characterized in that: The tank body of the adsorption sedimentation tank (1) is composed of heat-insulating materials; And / or, the adsorption sedimentation tank (1) is filled with fillers for adsorption and phosphorus removal.

3. The modular artificial wetland water purification system according to claim 1, characterized in that: A first water inlet is provided at the bottom of the side of the adsorption sedimentation tank (1) for connecting to a sewage inlet pipe (11); a first water outlet is provided at the top of the side of the adsorption sedimentation tank (1); a second water inlet is provided at the bottom of the water distribution channel (2); one end of the outlet pipe (12) is connected to the first water outlet, and the other end is connected to the second water inlet.

4. The modular artificial wetland water purification system according to claim 1, characterized in that: The water outlet flow channel is also provided with a water control gate valve (21) corresponding to the water outlet flow channel, which is used to control the flow rate of the water outlet flow channel.

5. The modular artificial wetland water purification system according to claim 1, characterized in that: A detachable packing column (5) is also provided between the water distribution channel (2) and the modular wetland unit (3); the packing column (5) is tightly connected to the modular wetland unit (3); the water inlet side of the modular wetland unit (3) is a mesh structure; the connection surface between the packing column (5) and the modular wetland unit (3) is a mesh structure; the water outlet channel is connected to the packing column (5); sewage is evenly distributed through the packing column (5) and enters the modular wetland unit (3).

6. The modular artificial wetland water purification system according to claim 1, characterized in that: A plurality of the modular wetland units (3) are arranged in series and / or in parallel. Removable packing columns (5) are provided between the modular wetland units (3) arranged in series, and impermeable partitions (34) are provided between the modular wetland units (3) arranged in parallel.

7. The modular artificial wetland water purification system according to any one of claims 5 to 6, characterized in that: The filler in the filler column (5) is selected from oxygen-releasing fillers or heat-releasing fillers.

8. The modular artificial wetland water purification system according to claim 1, characterized in that: The modular wetland unit (3) is also provided with a microbial flora automatic dosing device (33) for adding bacterial agents to the modular wetland unit (3).

9. The modular artificial wetland water purification system according to claim 1, characterized in that: Plants are also planted in the modular wetland unit (3), and the plants are arranged in a cold season and warm season interplanting configuration; And / or, a second water outlet is provided at the upper end of the outlet side of the modular wetland unit (3), suitable for sewage to flow from the second water outlet into the next modular wetland unit (3) or the water collection channel (4).

10. The modular artificial wetland water purification system according to claim 1, characterized in that: The height of the outlet side of the water collection channel (4) is not higher than the height of the outlet side of the modular wetland unit (3).

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