Module type horizontal subsurface flow wetland capable of being flexibly adjusted and regulation and control method

Abstract

The invention discloses a modular horizontal subsurface wetland capable of being flexibly adjusted and a regulation and control method, and belongs to the field of municipal drainage. The modular horizontal subsurface flow wetland capable of being flexibly adjusted comprises an integrated wetland, the integrated wetland is composed of a first gravel area, wetland plants, a second gravel area, medium-coarse sand and broken stones, the first gravel area is located on one side of the broken stones, the second gravel area is located on the other side of the broken stones, and the first gravel area is located on one side of the medium-coarse sand. And the wetland plants are positioned at the upper ends of the broken stones. The device solves the problems that when wastewater is treated by an existing traditional method, the device cannot be adjusted and switched between an aerobic mode and an anaerobic mode, and the whole structure cannot adjust the tail water flow track according to the mode switching, after the liquid flow track is adjusted through a first manual gate valve, the liquid flow track is adjusted through an electronic valve, and the tail water flow track is adjusted through a second manual gate valve. And the tail water flows into the first gravel area at different positions and is discharged from the position of the second water pipe in the second gravel area after being in contact with the gravel.

Description

Technical Field

[0001] The invention relates to the field of municipal drainage, and in particular to a flexibly adjustable modular horizontal subsurface flow wetland and a control method thereof. Background Art

[0002] Artificial wetland technology originated in the early 20th century and was developed in Europe and the United States. This technology has gradually been widely used due to its advantages such as low cost, simple structure, convenient construction, and easy management and maintenance. Its specific forms include surface flow wetlands, horizontal subsurface flow wetlands, vertical subsurface flow wetlands, and composite vertical flow wetlands. Among them, subsurface flow wetlands are less affected by climate and seasons and can effectively prevent the breeding of mosquitoes and flies, so they have been widely promoted in my country.

[0003] In recent years, with the continuous deepening of research on subsurface artificial wetlands, its shortcomings such as easy clogging and poor ammonia nitrogen removal have been significantly improved. However, in the application process, it was found that the dissolved oxygen concentration inside the subsurface artificial wetland is generally low, usually less than 1 mg / L, which limits the wetland's removal of organic matter, ammonia nitrogen and denitrification effect, especially in horizontal subsurface wetlands. Traditional pre-aeration methods, such as using an aerator to inject air into the water body to increase the dissolved oxygen concentration, have problems such as high energy consumption, the need for a separate pretreatment device, high operating costs, and the inability to meet the continuous oxygen supply needs. In addition, it cannot be adjusted and switched between aerobic and anaerobic modes, and the overall structure cannot adjust the tailwater flow trajectory to cope with the switching of modes. Summary of the invention

[0004] The purpose of the present invention is to provide a modular horizontal submerged flow wetland and a control method that can be flexibly adjusted. After adjusting the liquid flow trajectory through a first manual gate valve, the tail water is adjusted by an electronic valve to flow into a first gravel area at different positions, and is discharged from a second water pipe position inside the second gravel area after contacting the gravel, thereby solving the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a modular horizontal subsurface flow wetland that can be flexibly adjusted, including an integrated wetland, wherein the integrated wetland consists of a first gravel area, wetland plants, a second gravel area, medium-coarse sand and crushed stone, wherein the first gravel area is located on one side of the crushed stone, and the second gravel area is located on the other side of the crushed stone, the wetland plants are located at the upper end of the crushed stone, and a filler layer is laid at the roots of the wetland plants, wherein the filler layer is composed of a variety of sand and gravel and artificial expanded clay filler codes laid flat on the crushed stone, the upper layer of the filler layer uses a small-size graded filter material, and the lower layer uses a larger-size graded filter material; the medium-coarse sand is located at the lower ends of the first gravel area, the crushed stone and the second gravel area, and the upper and lower ends of one side of the first gravel area are provided with a first water pipe, and the upper and lower ends of the other side of the second gravel area are provided with a second water pipe.

[0006] Preferably, an electronic valve is installed on the first water pipe, and a first manual gate valve is installed on the pipeline formed by connecting the two first water pipes in parallel.

[0007] Preferably, both the first water pipe and the second water pipe are provided with through holes facing the gravel position.

[0008] Preferably, a plurality of through holes are sequentially provided in the interior of the first water pipe and the second water pipe, and the distance between two adjacent through holes is 100 mm.

[0009] Preferably, the wetland plants consist of a first pickerel grass, a second pickerel grass and a hydrangea, wherein the first pickerel grass is located on one side of the second pickerel grass, and the hydrangea is located on the other side of the second pickerel grass.

[0010] Preferably, a drainage area is provided on the other side of the second gravel area, a glass fiber reinforced plastic grating cover is provided at the upper end of the drainage area, a drainage pipe is provided at the bottom of the drainage area, and a second manual gate valve is installed on the drainage pipe.

[0011] The present invention provides another technical solution: a method for regulating a modular horizontal subsurface flow wetland that can be flexibly adjusted, comprising the following steps:

[0012] S1: Multiple integrated wetlands are connected in series and in parallel through pipelines to form a modular structure according to the tailwater quality;

[0013] S2: When operating in aerobic mode, a low liquid level operation mode is adopted, and the first water pipe at the upper left end and the second water pipe at the upper right end are blocked by an electronic valve, and the electronic valve between the first water pipe at the lower left end and the first manual gate valve is opened at the same time. After the tail water is opened through the first manual gate valve, it flows toward the integrated wetland, so that the tail water flows into the first water pipe at the lower left end of the first gravel area, and is finally discharged from the second water pipe at the lower right end of the second gravel area;

[0014] S3: When operating in anaerobic mode, a high liquid level operation mode is adopted, and the first water pipe at the lower left end and the second water pipe at the lower right end are blocked by an electronic valve. At the same time, the electronic valve between the first water pipe at the upper left end and the first manual gate valve is opened. After the tail water is opened through the first manual gate valve, it flows toward the integrated wetland, so that the tail water flows into the first water pipe at the upper left end of the first gravel area, and finally the tail water is discharged from the second water pipe at the upper right end of the second gravel area.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The modular production and assembly of the integrated wetland of the present invention saves earth excavation time, is simple to construct, and is convenient to replace. At the construction site, it is only necessary to simply organize the area covered by the integrated wetland, without the need for large-scale land leveling, hardening treatment or anti-seepage measures, thereby significantly accelerating the construction progress of the wetland project. The first water pipe and the second water pipe are respectively arranged at the upper and lower parts of the first gravel area and the second gravel area, which can control the water level height in the equipment, realize the switching of the aerobic and anaerobic modes of the equipment operation, and control the nitrification and denitrification reaction processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the integrated wetland connection plane of the present invention;

[0018] Figure 2 This is a front view of the internal structure of the integrated wetland of the present invention;

[0019] Figure 3 It is a schematic diagram of the internal structure of the wetland plant of the present invention;

[0020] Figure 4 This is a schematic diagram of the positional relationship between the first water pipe and the second water pipe of the present invention;

[0021] Figure 5 A schematic diagram of the position relationship of the through holes of the present invention;

[0022] Figure 6 It is a working state diagram of the present invention.

[0023] In the figure: 1. FRP grille cover; 2. Drainage area; 3. Drainage pipe; 5. Wetland plants; 6. Gravel; 7. Medium-coarse sand; 8. First gravel area; 9. Second gravel area; 10. First pickerel grass; 11. Second pickerel grass; 12. Zaocys strychnifolia; 13. First water pipe; 14. Second water pipe; 15. Through hole; 16. Submersible sewage pump; 17. First manual gate valve; 18. Integrated wetland; 19. Second manual gate valve; 20. Electronic valve. DETAILED DESCRIPTION

[0024] The present invention is further described below in conjunction with specific embodiments.

[0025] like Figure 1 and Figure 2As shown, a modular horizontal submerged flow wetland with flexible adjustment in this embodiment includes an integrated wetland 18, a first manual gate valve 17 is arranged outside the integrated wetland 18, when a plurality of integrated wetlands 18 are arranged in parallel, the flow trajectory of the liquid can be directly adjusted by adjusting the first manual gate valve 17 corresponding to the integrated wetland 18, a second manual gate valve 19 is arranged on the other side of the integrated wetland 18, the tail water passing through the integrated wetland 18 will be controlled by the second manual gate valve 19 when discharged, a submersible sewage pump 16 is arranged on one side of the first manual gate valve 17, and the submersible sewage pump 16 is sealed and connected to the first manual gate valve 17, when the submersible sewage pump 16 extracts liquid and transmits it toward the integrated wetland 18, the submersible sewage pump 16 is started, and the start of the submersible sewage pump 16 can transmit the liquid to the integrated wetland 18 through the first manual gate valve 17;

[0026] In order to facilitate the processing of the liquid extracted by the submersible sewage pump 16, as Figure 2 and Figure 3 As shown, the integrated wetland 18 is composed of a first gravel area 8, wetland plants 5, a second gravel area 9, medium-coarse sand 7 and crushed stone 6. The first gravel area 8 is located on one side of the crushed stone 6, and the second gravel area 9 is located on the other side of the crushed stone 6. The wetland plants 5 are located at the upper end of the crushed stone 6. A filler layer is laid at the roots of the wetland plants. The filler layer is composed of a variety of gravels and artificial ceramsite fillers laid flat on the crushed stone 6. The upper layer of the filler layer uses a small-size graded filter material, and the lower layer uses a larger-size graded filter material; the medium-coarse sand 7 is located at the lower ends of the first gravel area 8, the crushed stone 6 and the second gravel area 9. After the first manual gate valve 17 is rotated and opened, the liquid will flow into the integrated wetland 18. The liquid flowing into the integrated wetland 18 will pass through the first gravel area 8, the crushed stone 6 and the second gravel area 9 in sequence, and will contact the roots of the wetland plants 5 when passing through the crushed stone 6.

[0027] In addition, if Figure 6 As shown, in order to facilitate the adjustment of the trajectory of liquid flow, first water pipes 13 are provided at both upper and lower ends of one side of the first gravel area 8, and second water pipes 14 are provided at both upper and lower ends of the other side of the second gravel area 9. Electronic valves 20 are provided between the two first water pipes 13 and the first manual gate valves 17, respectively. After the first manual gate valve 17 is opened, the opening of the electronic valve 20 can determine the final discharge position of the liquid, so as to cope with the operation of the aerobic mode and the anaerobic mode.

[0028] In order to facilitate the discharge of liquid and the cleaning of the drainage position, a drainage area 2 is provided on the other side of the second gravel area 9, a glass fiber reinforced plastic grid cover 1 is provided on the upper end of the drainage area 2, a drainage pipe 3 is provided on the other side of the lower end of the drainage area 2, and a second manual gate valve 19 is provided at one end of the drainage pipe 3:

[0029] In order to facilitate the even transmission and distribution of the transmitted liquid into the integrated wetland 18, the first water pipe 13 and the second water pipe 14 are both provided with through holes 15 in a transverse direction toward the middle of the gravel 6. Figure 4 and Figure 5 As shown, 24 through holes 15 are sequentially provided inside the first water pipe 13 and the second water pipe 14, and the distance between two adjacent through holes 15 is 100 mm;

[0030] The wetland plants 5 are composed of the first pickerel grass 10, the second pickerel grass 11 and the zwiebel flower 12. The first pickerel grass 10 is located on one side of the second pickerel grass 11, and the zwiebel flower 12 is located on the other side of the second pickerel grass 11. During the transmission process, the liquid will pass through the first pickerel grass 10, the second pickerel grass 11 and the zwiebel flower 12 in sequence and then be discharged. The tail water passes through the pickerel grass and the zwiebel flower in sequence to purify the water quality. The pickerel grass is a perennial emergent plant that likes to grow in shallow water areas and plays an important role in purifying water quality. It can decompose harmful and toxic substances in the water and absorb the water at the same time. It removes heavy metal substances, making the water source purer and playing an important role in protecting the environment. Zygophyllum 12 is also an aquatic plant that can purify water quality and has the ability to catch insects. When the tail water contacts the pickerel grass and Zygophyllum 12 in turn, the purification abilities of these two plants can work synergistically to more effectively remove harmful substances in the tail water, including nutrients, heavy metal ions, organic compounds, etc., thereby improving the transparency and overall quality of the water. In addition, they can also provide a healthy environment for aquatic ecosystems, promote the maintenance of biodiversity, and indirectly support the natural evolution process of water quality.

[0031] In order to further better explain the embodiment of the present invention, a method for regulating a modular horizontal subsurface flow wetland that can be flexibly adjusted is also provided, comprising the following steps:

[0032] S1: Multiple integrated wetlands 18 are connected in series and in parallel through pipelines to form a modular structure according to the tailwater quality;

[0033] S2: When running in the aerobic mode, a low liquid level operation mode is adopted, and the electronic valve 20 is used to block the first water pipe 13 at the upper left end and the second water pipe 14 at the upper right end, and the electronic valve 20 between the first water pipe 13 at the lower left end and the first manual gate valve 17 is opened. After the tail water is opened through the first manual gate valve 17, it flows toward the integrated wetland 18, so that the tail water flows into the first water pipe 13 at the lower left end of the first gravel area 8, and is finally discharged from the second water pipe 14 at the lower right end of the second gravel area 9;

[0034] S3: When operating in anaerobic mode, a high liquid level operation mode is adopted, and the electronic valve 20 is used to block the first water pipe 13 at the lower left end and the second water pipe 14 at the lower right end. At the same time, the electronic valve 20 between the first water pipe 13 at the upper left end and the first manual gate valve 17 is opened. After the tail water is opened through the first manual gate valve 17, it flows toward the integrated wetland 18, so that the tail water flows into the first water pipe 13 at the upper left end inside the first gravel area 8, and finally the tail water is discharged from the second water pipe 14 at the upper right end inside the second gravel area 9.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0036] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A modular horizontal subsurface flow wetland with flexible adjustment, comprising an integrated wetland (18), characterized in that: The integrated wetland (18) is composed of a first gravel area (8), wetland plants (5), a second gravel area (9), medium-coarse sand (7) and crushed stones (6); the first gravel area (8) is located on one side of the crushed stones (6), and the second gravel area (9) is located on the other side of the crushed stones (6); the wetland plants (5) are located at the upper end of the crushed stones (6); a filler layer is laid at the root of the wetland plants (5); the filler layer is composed of a variety of sand and gravel and artificial ceramsite filler codes laid flat on the crushed stones (6); the upper layer of the filler layer uses a filter material with a small particle size grade, and the lower layer uses a filter material with a larger particle size grade; the medium-coarse sand (7) is located at the lower ends of the first gravel area (8), the crushed stones (6) and the second gravel area (9); the first water pipe (13) is provided at both upper and lower ends of one side of the first gravel area (8), and the second water pipe (14) is provided at both upper and lower ends of the other side of the second gravel area (9).

2. The flexibly adjustable modular horizontal subsurface flow wetland according to claim 1, characterized in that: An electronic valve (20) is installed on the first water pipe (13), a first manual gate valve (17) is installed on the pipeline formed by connecting the two first water pipes (13) in parallel, and the outside of the parallel pipeline is connected to a submersible sewage pump (16).

3. The flexibly adjustable modular horizontal subsurface flow wetland according to claim 2, characterized in that: The first water pipe (13) and the second water pipe (14) are both provided with through holes (15) facing the position of the gravel (6).

4. The flexibly adjustable modular horizontal subsurface flow wetland according to claim 3 is characterized in that: A plurality of through holes (15) are sequentially arranged inside the first water pipe (13), and the distance between two adjacent through holes (15) is 100 mm.

5. The flexibly adjustable modular horizontal subsurface flow wetland according to claim 1, characterized in that: The wetland plants (5) are composed of a first pickerel grass (10), a second pickerel grass (11) and a waterlily (12), wherein the first pickerel grass (10) is located on one side of the second pickerel grass (11), and the waterlily (12) is located on the other side of the second pickerel grass (11).

6. The flexibly adjustable modular horizontal subsurface flow wetland according to claim 1, characterized in that: A drainage area (2) is arranged on the other side of the second gravel area (9), a glass fiber reinforced plastic grating cover plate (1) is arranged at the upper end of the drainage area (2), a drainage pipe (3) is arranged at the bottom of the drainage area (2), and a second manual gate valve (19) is installed on the drainage pipe (3).

7. A method for regulating a modular horizontal subsurface flow wetland that can be flexibly adjusted according to claim 1, characterized in that: The following steps are involved: S1: Multiple integrated wetlands 18 are connected in series and in parallel through pipelines to form a modular structure according to the tailwater quality; S2: When running in the aerobic mode, a low liquid level operation mode is adopted, and the electronic valve 20 is used to block the first water pipe 13 at the upper left end and the second water pipe 14 at the upper right end, and the electronic valve 20 between the first water pipe 13 at the lower left end and the first manual gate valve 17 is opened. After the tail water is opened through the first manual gate valve 17, it flows toward the integrated wetland 18, so that the tail water flows into the first water pipe 13 at the lower left end of the first gravel area 8, and is finally discharged from the second water pipe 14 at the lower right end of the second gravel area 9; S3: When operating in anaerobic mode, a high liquid level operation mode is adopted, and the electronic valve 20 is used to block the first water pipe 13 at the lower left end and the second water pipe 14 at the lower right end. At the same time, the electronic valve 20 between the first water pipe 13 at the upper left end and the first manual gate valve 17 is opened. After the tail water is opened through the first manual gate valve 17, it flows toward the integrated wetland 18, so that the tail water flows into the first water pipe 13 at the upper left end inside the first gravel area 8, and finally the tail water is discharged from the second water pipe 14 at the upper right end inside the second gravel area 9.

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