Backflow type miniature artificial wetland system

Abstract

The utility model provides a backflow type miniature artificial wetland system which is provided with an accommodating cavity formed by walls, and the accommodating cavity is divided into an adjusting tank unit, a first-stage vertical flow wetland unit, a second-stage vertical flow wetland unit and a backflow tank unit which are adjacent in sequence through a plurality of partition plates, an inner-layer bottom plate of the containing cavity is provided with a slope inclining downwards in the direction from the adjusting tank unit to the backflow tank unit, a first cover plate is installed at the top of the adjusting tank unit, a second cover plate is installed at the top of the backflow tank unit, and the first cover plate and the second cover plate are connected to the wall body in a turnover mode. According to the utility model, a plurality of units are sequentially separated and connected, so that the artificial wetland is small in occupied area and efficient in treatment, and the pollutant removal capacity of the wetland is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a reflow type micro artificial wetland system. Background Art

[0002] Rural domestic sewage treatment is a key and difficult task in the improvement of rural living environment. The level of domestic sewage treatment directly affects the low-carbon green development of rural my country. Therefore, it is very important to find a reasonable rural domestic sewage treatment solution.

[0003] Constructed wetlands are an ecological sewage treatment technology that treats sewage mainly through the physical, chemical and biological synergistic effects of matrix fillers, aquatic plants and microorganisms. Constructed wetlands are suitable for the treatment of rural domestic sewage because of their good treatment effect, low construction and operation costs, simple management and maintenance, and high resistance to water force and pollution load impact.

[0004] In the prior art, as the wetland is in operation, it is easy to get clogged, which makes it difficult to discharge water from the wetland. The common solution is to clean or replace the filler, but this greatly increases the operating cost, and the internal structure of the wetland is easily damaged during the replacement of the filler. At the same time, due to long-term immersion inside the artificial wetland, the internal dissolved oxygen concentration is low, and it is difficult to increase the dissolved oxygen in the artificial wetland by relying solely on the oxygen transport capacity of the wetland plant roots, making the wetland mostly anaerobic. During long-term operation, there are problems such as low phosphorus removal efficiency and unstable ammonia nitrogen removal effect. In order to ensure the quality of the effluent, a large number of artificial wetlands have to increase the removal efficiency of pollutants such as ammonia nitrogen and total phosphorus by increasing the wetland area. While increasing the construction cost, it also greatly limits the large-scale application of artificial wetland technology in the field of rural domestic sewage treatment. Utility Model Content

[0005] In order to solve the above problems, the utility model provides a reflow type micro artificial wetland system to solve the problems of artificial wetlands in the prior art being prone to clogging, low phosphorus removal efficiency and unstable ammonia nitrogen removal effect.

[0006] The utility model provides a reflow type micro artificial wetland system, which has a accommodating cavity composed of a wall, wherein the accommodating cavity is divided into a regulating pool unit, a primary vertical flow wetland unit, a secondary vertical flow wetland unit and a reflow pool unit which are adjacent to each other in sequence by a plurality of partitions, and an inner bottom plate of the accommodating cavity is provided with a slope inclined downward from the regulating pool unit to the reflow pool unit, a first cover plate is installed on the top of the regulating pool unit, and a second cover plate is installed on the top of the reflow pool unit, and the first cover plate and the second cover plate can be flipped and connected to the wall respectively.

[0007] Furthermore, an "L"-shaped water inlet pipe is installed through the wall at the lower part of one side of the regulating tank unit. One end of the water inlet pipe is connected to the outside of the artificial wetland system, and the other end extends into the regulating tank unit. The outlet of the water inlet pipe is close to the bottom of the regulating tank unit, and a waterproof solenoid valve is arranged at the outlet of the water inlet pipe.

[0008] Furthermore, a straight-tube return pipe is installed through the wall in the middle of one side of the regulating tank unit. One end of the return pipe is connected to a return water pump through a hose, and the other end extends into the regulating tank unit.

[0009] Furthermore, a first partition is arranged between the regulating tank unit and the primary vertical flow wetland unit, the upper portion of the first partition is serrated, and there is a 10 cm gap between the top of the first partition and the first cover plate.

[0010] Furthermore, a second partition is arranged between the first-level vertical flow wetland unit and the second-level vertical flow wetland unit, and two rows of holes with a diameter of 3 cm are arranged at the lower part of the second partition to form a water passage.

[0011] Furthermore, the first-level vertical flow wetland unit and the second-level vertical flow wetland unit are filled with gravel with a particle size of 16-32 mm and coarse sand with a particle size of 5-16 mm from bottom to top, respectively. The gravel filling height is 50 cm to form a gravel layer, and the coarse sand filling height is 30 cm to form a coarse sand layer. Aquatic plants are planted in the coarse sand layer.

[0012] Furthermore, cattail and canna are planted in the coarse sand layer of the primary vertical flow wetland unit, and calamus and windmill grass are planted in the coarse sand layer of the secondary vertical flow wetland unit.

[0013] Furthermore, a third partition is arranged between the secondary vertical flow wetland unit and the reflow pool unit, and the height of the third partition is equal to the height of the filler in the secondary vertical flow wetland unit.

[0014] Furthermore, a straight pipe type drainage pipe is installed through the wall in the upper middle part of one side of the reflow pool unit, and a fourth partition is installed in the reflow pool unit. The height of the fourth partition is equal to the internal height of the reflow pool unit, and two rows of holes with a diameter of about 3 cm are arranged at the bottom of the fourth partition to form a water passage.

[0015] Furthermore, a liquid level controller and a reflux water pump are also provided in the reflux pool unit. The reflux water pump is provided close to the wall. The liquid level controller is electrically connected to the reflux water pump and an external control system.

[0016] The regulating tank unit of the reflow type micro artificial wetland system of the utility model removes suspended matter in sewage through sedimentation, solves the problem of filler clogging during the long-term operation of the wetland, and ensures the long-term and stable operation of the wetland.

[0017] The reflow pool unit of the reflow type micro artificial wetland system in the utility model realizes multiple circulation treatment of sewage. At the same time, the circulating flow of the water body realizes the atmospheric reoxygenation of the water body, increases the dissolved oxygen concentration in the wetland, improves the wetland's removal effect on pollutants, and ensures the effluent water quality.

[0018] The top shape of the partition plate between the regulating tank unit and the primary vertical flow wetland unit of the utility model and the design of the height difference between the partition plate and the filler realize natural waterfall, which can increase the dissolved oxygen concentration in the water body and improve the water purification effect of the wetland.

[0019] The utility model connects and separates a plurality of units in sequence, so that the artificial wetland occupies a small area and has efficient treatment, thereby improving the pollutant removal capacity of the wetland, reducing the area of ​​the wetland while ensuring the effluent quality, realizing the treatment of sewage in rural courtyards, and greatly realizing the large-scale application of artificial wetlands in the field of rural domestic sewage treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0021] Figure 1 The utility model provides an overall schematic diagram of a reflow type micro artificial wetland system.

[0022] Description of reference numerals:

[0023] 1-wall, 2-solenoid valve, 3-water inlet pipe, 4-return pipe, 5-regulating tank unit, 6-first partition, 7-first cover plate, 8-primary vertical flow wetland unit, 9-wetland plants, 10-second partition, 11-secondary vertical flow wetland unit, 12-third partition, 13-second cover plate, 14-return tank unit, 15-drain pipe, 16-fourth partition, 17-liquid level controller, 18-return water pump. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0025] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the 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 orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0026] See attached Figure 1 The utility model provides a reflow type micro artificial wetland system, which has a accommodating cavity composed of a wall 1, and the accommodating cavity is divided into a regulating pool unit 5, a first-level vertical flow wetland unit 8, a second-level vertical flow wetland unit 11 and a reflow pool unit 14 which are adjacent to each other in sequence by a plurality of partitions. The inner bottom plate of the accommodating cavity is provided with a slope inclined downward from the regulating pool unit 5 to the reflow pool unit 14. A first cover plate 7 is installed on the top of the regulating pool unit 5, and a second cover plate 13 is installed on the top of the reflow pool unit 14. The first cover plate 7 and the second cover plate 13 can be flipped and connected to the wall 1 respectively.

[0027] Specifically, the downward slope from the regulating tank unit 5 to the reflow tank unit 14 is 2-3‰, and the partition is anti-seepage treated around.

[0028] Specifically, an "L"-shaped water inlet pipe 3 is installed through the wall 1 at the lower part of one side of the regulating tank unit 5. One end of the water inlet pipe 3 is connected to the outside of the artificial wetland system, and the other end extends into the regulating tank unit 5. The outlet of the water inlet pipe 3 is close to the bottom of the regulating tank unit 5, and a waterproof solenoid valve is arranged at the outlet of the water inlet pipe 3.

[0029] Specifically, a straight pipe type return pipe 4 is installed through the wall 1 in the middle of one side of the regulating tank unit 5 . One end of the return pipe 4 is connected to the return water pump 18 through a hose, and the other end extends into the regulating tank unit 5 .

[0030] Specifically, a first partition 6 is arranged between the regulating tank unit 5 and the primary vertical flow wetland unit 8 , the upper portion of the first partition 6 is serrated, and there is a 10 cm gap between the top of the first partition 6 and the first cover plate 7 .

[0031] Specifically, a second partition 10 is disposed between the primary vertical flow wetland unit 8 and the secondary vertical flow wetland unit 11 , and two rows of holes with a diameter of 3 cm are disposed at the lower portion of the second partition 10 to form a water passage.

[0032] Specifically, the first-level vertical flow wetland unit 8 and the second-level vertical flow wetland unit 11 are filled with gravel with a particle size of 16-32 mm and coarse sand with a particle size of 5-16 mm from bottom to top, respectively. The gravel filling height is 50 cm to form a gravel layer, and the coarse sand filling height is 30 cm to form a coarse sand layer. Aquatic plants 9 are planted in the coarse sand layer.

[0033] Specifically, cattail and canna are planted in the coarse sand layer of the primary vertical flow wetland unit 8, and calamus and windmill grass are planted in the coarse sand layer of the secondary vertical flow wetland unit 11.

[0034] Specifically, a third partition 12 is disposed between the secondary vertical flow wetland unit 11 and the reflow pool unit 14 , and the height of the third partition 12 is equal to the height of the filler in the secondary vertical flow wetland unit 11 .

[0035] Specifically, a straight pipe drain pipe 15 is installed through the wall 1 in the middle and upper part of one side of the reflow pool unit 14, and a fourth partition plate 16 is installed in the reflow pool unit 14. The height of the fourth partition plate 16 is equal to the internal height of the reflow pool unit 14, and two rows of holes with a diameter of about 3 cm are arranged at the bottom of the fourth partition plate 16 to form a water passage.

[0036] Specifically, the diameters of the water inlet pipe 3 and the return pipe 4 are DN20, the diameter of the drainage pipe 15 is DN40, the first cover plate 7 and the second cover plate 13 are 2 cm thick, and are made of PPH.

[0037] Specifically, a liquid level controller 17 and a reflux water pump 18 are further provided in the reflux pool unit 14. The reflux water pump 18 is provided close to the wall 1, and the liquid level controller 17 is electrically connected to the reflux water pump 18 and an external control system.

[0038] The sewage treatment using the above-mentioned reflow type micro artificial wetland system includes the following steps:

[0039] S1. The sewage enters the regulating tank unit 5 from the water inlet pipe 3, and the suspended particles in the sewage are gathered in the regulating tank unit through sedimentation;

[0040] S2. After the sewage passes through the first baffle 6 and enters the primary vertical flow wetland unit 8, it enters the secondary vertical flow wetland unit 11 through the bottom hole of the second baffle 10, and the organic matter, nitrogen, phosphorus and other pollutants in the sewage are removed through the physical, chemical and biological effects of matrix fillers, aquatic plants and microorganisms;

[0041] S3. After being treated in the primary and secondary vertical flow wetland units, the sewage is discharged into the reflow tank unit 14 and discharged from the drain pipe 15;

[0042] S4. When the sewage stops entering, the return water pump 18 is started, the solenoid valve 2 on the water inlet pipe 3 is closed, and the wetland enters the self-circulation mode. The water in the return pool unit 14 is re-transported to the regulating pool unit 5 through the return water pump 18 for circulation treatment;

[0043] S5. When sewage from outside the wetland begins to enter, the return water pump 18 is closed, the solenoid valve 2 is opened, and the above steps are repeated.

[0044] Furthermore, in the initial state, the solenoid valve 2 is opened, and the sewage enters the regulating tank unit 5 through the water inlet pipe 3 to remove suspended solids. When the liquid level in the regulating tank unit 5 reaches the height of the first partition 6, the sewage freely falls over the partition into the primary vertical flow wetland unit 8, passes through the primary vertical flow wetland unit 8 from top to bottom, passes through the holes at the bottom of the second partition 10, flows into the secondary vertical flow wetland unit 11, and flows through the wetland from bottom to top. The sewage treated in the wetland flows over the third partition 12 into the return tank unit 14, and the water flow stops before being discharged from the wetland system.

[0045] Furthermore, when the wetland stops taking in water, the solenoid valve 2 is closed, and the reflux pump 18 is opened under the action of the liquid level controller 17. The sewage in the reflux tank unit 14 is re-transported to the regulating tank unit 5 through the reflux pump 18 and the reflux pipe 4 to circulate the water in the wetland.

[0046] Furthermore, when the wetland starts to be filled with water again, the solenoid valve 2 is opened and the return water pump 18 is closed. After the sewage flows through the regulating tank unit, the first vertical flow wetland unit, the second vertical flow wetland unit and the return tank unit, the water in the wetland is discharged from the drain pipe 15.

[0047] Furthermore, the wetland treatment scale is set according to the maximum domestic sewage discharge of farmers' households, and the wetland treatment scale is 0.5m 3 / d, and the test results for 100 consecutive days showed that the wetland treatment effect was stable and efficient.

[0048] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0049] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A reflow type micro artificial wetland system, comprising a receiving cavity composed of a wall (1), characterized in that: The accommodating chamber is divided into a regulating pool unit (5), a first-level vertical flow wetland unit (8), a second-level vertical flow wetland unit (11) and a reflow pool unit (14) which are adjacent to each other in sequence by a plurality of partitions; the inner bottom plate of the accommodating chamber is provided with a slope which is inclined downward in the direction from the regulating pool unit (5) to the reflow pool unit (14); a first cover plate (7) is installed on the top of the regulating pool unit (5); and a second cover plate (13) is installed on the top of the reflow pool unit (14); the first cover plate (7) and the second cover plate (13) are respectively flippably connected to the wall (1).

2. A reflow type micro artificial wetland system according to claim 1, characterized in that: An "L"-shaped water inlet pipe (3) is installed at the lower part of one side of the regulating pool unit (5) and passes through the wall (1); one end of the water inlet pipe (3) is connected to the outside of the artificial wetland system, and the other end extends into the regulating pool unit (5); the outlet of the water inlet pipe (3) is close to the bottom of the regulating pool unit (5); and a waterproof solenoid valve is arranged at the outlet of the water inlet pipe (3).

3. A reflow type micro artificial wetland system according to claim 2, characterized in that: A straight pipe type return pipe (4) is installed through the wall (1) in the middle of one side of the regulating tank unit (5); one end of the return pipe (4) is connected to a return water pump (18) via a hose, and the other end extends into the regulating tank unit (5).

4. A reflow type micro artificial wetland system according to claim 1, characterized in that: A first partition (6) is arranged between the regulating pool unit (5) and the primary vertical flow wetland unit (8); the upper portion of the first partition (6) is serrated, and a gap of 10 cm is provided between the top of the first partition (6) and the first cover plate (7).

5. The reflow type micro artificial wetland system according to claim 1, characterized in that: A second partition (10) is arranged between the first-level vertical flow wetland unit (8) and the second-level vertical flow wetland unit (11), and two rows of holes with a diameter of 3 cm are arranged at the lower part of the second partition (10) to form a water passage.

6. A reflow type micro artificial wetland system according to claim 4 or 5, characterized in that: The first-level vertical flow wetland unit (8) and the second-level vertical flow wetland unit (11) are filled from bottom to top with gravel with a particle size of 16-32 mm and coarse sand with a particle size of 5-16 mm, respectively. The gravel filling height is 50 cm to form a gravel layer, and the coarse sand filling height is 30 cm to form a coarse sand layer. Aquatic plants (9) are planted in the coarse sand layer.

7. A reflow type micro artificial wetland system according to claim 6, characterized in that: Cattail and canna are planted in the coarse sand layer of the first-level vertical flow wetland unit (8), and calamus and windmill grass are planted in the coarse sand layer of the second-level vertical flow wetland unit (11).

8. The reflow type micro artificial wetland system according to claim 1, characterized in that: A third partition (12) is arranged between the secondary vertical flow wetland unit (11) and the reflow pool unit (14), and the height of the third partition (12) is equal to the height of the filler in the secondary vertical flow wetland unit (11).

9. The reflow type micro artificial wetland system according to claim 1, characterized in that: A straight pipe type drainage pipe (15) is installed through the wall (1) at the middle and upper part of one side of the reflow pool unit (14), and a fourth partition plate (16) is installed inside the reflow pool unit (14). The height of the fourth partition plate (16) is equal to the internal height of the reflow pool unit (14), and two rows of holes with a diameter of about 3 cm are arranged at the bottom of the fourth partition plate (16) to form a water passage.

10. A reflow type micro artificial wetland system according to claim 9, characterized in that: The reflow pool unit (14) is also provided with a liquid level controller (17) and a reflow water pump (18). The reflow water pump (18) is arranged close to the wall (1), and the liquid level controller (17) is electrically connected to the reflow water pump (18) and an external control system.

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