Step wetland structure

Abstract

The utility model relates to the technical field of constructed wetlands, in particular to a stepped wetland structure, which comprises a box-shaped body with an opening at the top, an inflow channel and an outflow channel are respectively arranged at two ends of the box-shaped body, and the box-shaped body comprises an inflow area, n stepped purification areas and an outflow area. Aiming at the technical problem that the existing constructed wetland has defects, the stepped wetland structure provided by the utility model is integrally in a stepped shape, so that sewage can flow automatically, and the energy consumption of the wetland is saved; by arranging a first partition wall, a second partition wall and a third partition wall, sewage is baffled in the inflow area, the stepped purification area and the outflow area, it is guaranteed that part of sewage flows from top to bottom to form gravity flow, particulate matter between filler can be scoured easily, and the problem of sedimentation in the wetland is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of artificial wetland, specifically relates to a cascade wetland structure. BACKGROUND

[0002] The artificial wetland is a kind of sewage ecological treatment system, is composed of shallow water system of planting aquatic plants, mainly relies on natural biology, physics and chemistry process to realize sewage purification, including the engineering structure of controlling flow direction, liquid detention time and water level.The artificial wetland of present people includes horizontal flow artificial wetland, subsurface artificial wetland, vertical subsurface artificial wetland, horizontal subsurface artificial wetland, ditch type artificial wetland etc.Conventional artificial wetland is filled with purification matrix in bottom, is configured plant in upper portion, realizes water purification.

[0003] In the operation process of artificial wetland, one of the most common problems is that the matrix is blocked.Usually, the problem of blockage is solved by in-situ cleaning, ex-situ cleaning or replacement of matrix.The existing technical measures are time-consuming, and all will affect the normal operation of wetland, and then affect the sewage treatment efficiency. UTILITY MODEL CONTENT

[0004] In view of the technical problem that the existing artificial wetland has defects, the utility model provides a cascade wetland structure, which is in the shape of ladder as a whole, so that the sewage can flow by itself, saving the energy consumption of wetland, and through the setting of the first partition wall, the second partition wall and the third partition wall, the sewage is folded in the inflow area, the cascade purification area and the outflow area, to ensure that part of the sewage flows from top to bottom to form gravity flow, which is conducive to flushing the particulate matter between the fillers and reducing the internal siltation problem of the wetland.

[0005] The utility model provides a technical scheme for: a kind of cascade wetland structure, including the box body of top opening, the both ends of the box body are provided with inflow channel and outflow channel, the box body includes inflow area, n cascade purification zones and outflow area, wherein, n is positive integer;Inflow area with adjacent cascade purification zone, adjacent cascade purification zone between and outflow area with adjacent cascade purification zone between are provided with partition wall, the bottom of the partition wall is provided with gap, and the inflow area, n cascade purification zones and outflow area are communicated by the gap;The inflow area includes first bottom surface, and first partition wall is fixedly arranged on the first bottom surface, and the first partition wall separates the inflow area into first cavity and second cavity, and the inflow channel is communicated with the first cavity;The cascade purification zone includes second bottom surface, and second partition wall is fixedly arranged on the second bottom surface, and the second partition wall separates the cascade purification zone into third cavity and fourth cavity;The outflow area includes third bottom surface, and third partition wall is fixedly arranged on the third bottom surface, and the third partition wall separates the outflow area into fifth cavity and sixth cavity, and the outflow channel is communicated with the sixth cavity;The height of the first bottom surface, second bottom surface and third bottom surface decreases in turn, and when n is greater than 1, the height of the second bottom surface decreases in turn from inflow channel to outflow channel direction;Filler is stacked in the inflow area, n cascade purification zones and outflow area, and vegetation layer is arranged on the top of the filler.

[0006] Optionally, the top elevation of each of the partition walls is higher than the top elevation of the adjacent first partition wall, second partition wall and third partition wall.

[0007] Optionally, the top of the first partition wall, second partition wall and third partition wall is provided with a notch.

[0008] Optionally, the depth of the inflow area, n cascade purification zones and outflow area is 0.3m to 0.2m.

[0009] Optionally, the height of the gap provided at the bottom of the partition wall is 10cm to 50cm.

[0010] Optionally, the surface of the filler is covered with a coconut shell cushion layer.

[0011] Optionally, the thickness of the coconut shell cushion layer is 5cm to 10cm.

[0012] Optionally, it further comprises a pre-heating device, the pre-heating device is used for heating sewage, and the pre-heating device is communicated with the inflow channel.

[0013] Beneficial effects

[0014] Compared with the prior art, the technical scheme has the beneficial effects that: for the technical problem of the defects of the existing artificial wetland, the ladder wetland structure provided by the utility model is in the shape of ladder as a whole, so that the sewage can flow by itself and the energy consumption of the wetland is saved; and through the arrangement of the first partition wall, the second partition wall and the third partition wall, the sewage is deflected in the inflow area, the ladder purification area and the outflow area, so that the gravity flow of the part of the sewage flowing from top to bottom is ensured, which is beneficial to flushing the particulate matters between the fillers and reducing the internal siltation problem of the wetland. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 A structure schematic view of the ladder wetland structure is provided for the utility model embodiment.

[0016] Figure 2 A structure schematic view of the ladder wetland structure is provided for the utility model embodiment. DETAILED DESCRIPTION

[0017] In order to further understand the content of the utility model, the utility model is described in detail in combination with the drawings and the embodiments.

[0018] The present application will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the utility model. Furthermore, it should be noted that, for ease of description, only the parts related to the utility model are shown in the accompanying drawings. The terms "first," "second," etc., used in this utility model are provided for the convenience of describing the technical solution of this utility model and have no specific limiting effect; they are all general terms and do not constitute a limitation on the technical solution of this utility model. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Multiple technical solutions in the same embodiment, as well as multiple technical solutions in different embodiments, can be arranged and combined to form new technical solutions that do not contradict or conflict, all of which are within the scope of protection claimed by this utility model.

[0019] Example 1

[0020] Combined with appendix Figure 1 and attached Figure 2 This embodiment proposes a tiered wetland structure, including a box-shaped body 1 with an open top. The box-shaped body 1 has an inflow channel 2 and an outflow channel 3 at its two ends. The box-shaped body 1 includes an inflow area 10, n tiered purification zones 11, and an outflow area 12, where n is a positive integer. Filler material is stacked within the inflow area 10, the n tiered purification zones 11, and the outflow area 12, and a vegetation layer is placed on top of the filler material.

[0021] A partition wall 4 is provided between the inflow area 10 and the adjacent tiered purification area 11, between adjacent tiered purification areas 11, and between the outflow area 12 and the adjacent tiered purification area 11. A gap 40 is provided at the bottom of the partition wall 4, and the inflow area 10, the n tiered purification areas 11 and the outflow area 12 are connected through the gap 40.

[0022] The inflow area 10 comprises a first bottom surface 101, and a first partition wall 102 is fixedly arranged on the first bottom surface 101, and the first partition wall 102 divides the inflow area 10 into a first cavity 103 and a second cavity 104, and the inflow channel 2 communicates with the first cavity 103; the stepped purification area 11 comprises a second bottom surface 111, and a second partition wall 112 is fixedly arranged on the second bottom surface 111, and the second partition wall 112 divides the stepped purification area 11 into a third cavity 113 and a fourth cavity 114; the outflow area 12 comprises a third bottom surface 121, and a third partition wall 122 is fixedly arranged on the third bottom surface 121, and the third partition wall 122 divides the outflow area 12 into a fifth cavity 123 and a sixth cavity 124, and the outflow channel 3 communicates with the sixth cavity 124. The heights of the first bottom surface 101, the second bottom surface 111 and the third bottom surface 121 decrease in sequence, and when n is greater than 1, the height of the second bottom surface 111 decreases in sequence from the inflow channel 2 to the outflow channel 3.

[0023] The working principle of the stepped wetland structure of the embodiment is as follows: the sewage enters the first cavity 103 of the inflow area 10 from the inflow channel 2, the fillers in the first cavity 103 preliminarily filter the sewage, the height of the sewage in the first cavity 103 gradually increases until the sewage flows into the second cavity 104 from top to bottom after the first partition wall 102 is passed, and the fillers and the vegetation layer on the top of the fillers in the second cavity 104 further purify the sewage.

[0024] Subsequently, the sewage flows to the adjacent stepped purification area 11 from the gap 40 at the bottom of the partition wall 4, specifically, the sewage enters the third cavity 113 of the adjacent stepped purification area 11 from bottom to top, the fillers and the vegetation layer on the top of the fillers in the third cavity 113 further purify the sewage. The height of the sewage in the third cavity 113 gradually increases until the sewage flows into the fourth cavity 114 from top to bottom after the second partition wall 112 is passed, and the fillers and the vegetation layer on the top of the fillers in the fourth cavity 114 further purify the sewage.

[0025] If a plurality of stepped purification areas 11 are arranged, the sewage flows step by step and is purified by the plurality of stepped purification areas 11, and the purification process is as described above.

[0026] The sewage in the last stage purification zone 11 flows from the gap 40 at the bottom of the partition wall 4 to the adjacent outflow zone 12. Similar to the above, the sewage enters the fifth cavity 123 of the adjacent outflow zone 12 from bottom to top, and the fillings in the fifth cavity 123 and the vegetation layer on the top of the fillings further purify the sewage. The sewage height in the fifth cavity 123 gradually rises until it overflows the third partition wall 122, and then the sewage flows into the sixth cavity 124 from top to bottom. The fillings in the sixth cavity 124 and the vegetation layer on the top of the fillings further purify the sewage. Finally, the purified sewage flows out of the box-shaped body 1 through the outflow channel 3.

[0027] In combination with the above principle, when the sewage flows from the first cavity 103 into the second cavity 104, from the third cavity 113 into the fourth cavity 114, and from the fifth cavity 123 into the sixth cavity 124, a gravity flow is formed from top to bottom. The formation of such a gravity flow is conducive to flushing the particulate matter between the fillings, thereby reducing the internal siltation problem of the wetland. By arranging the first partition wall 102, the second partition wall 112, and the third partition wall 122, the sewage in the inflow zone 10, the stage purification zone 11, and the outflow zone 12 forms a deflection, thereby further improving the sewage purification efficiency and saving land.

[0028] For the stage wetland structure of the present embodiment, the shape of the box-shaped body 1 can be rectangular, or can be flexibly adjusted to other shapes according to site conditions. The fillings are preferably gravel fillings, and the plants can be any plants that can purify sewage. In the present embodiment, the heights of the first bottom surface 101, the second bottom surface 111, and the third bottom surface 121 decrease in turn, and when n is greater than 1, the height of the second bottom surface 111 decreases in turn from the inflow channel 2 to the outflow channel 3. Thus, the bottom surface of the box-shaped body 1 is formed in a stepped shape, so that the sewage can flow by itself and save energy consumption of the wetland.

[0029] In a preferred embodiment, the top elevation of each partition wall 4 is higher than the top elevation of the adjacent first partition wall 102, second partition wall 112, and third partition wall 122. In this way, it can prevent the sewage from overflowing the partition wall 4 of the inflow zone 10, the stage purification zone 11, and the outflow zone 12, and ensure that the sewage can form a gravity flow.

[0030] In addition, the top of the first partition wall 102, the second partition wall 112, and the third partition wall 122 is preferably provided with a notch. The notch makes it easier for the sewage to flow over the top of the partition wall 4 and overflow into the downstream side.

[0031] It can be understood that as the size of the box-shaped body 1 increases, the sewage treatment capacity will also increase, but considering the safety and construction difficulty of the structure, in a preferred embodiment, the depth of the inflow zone 10, the n stage purification zones 11, and the outflow zone 12 should be controlled within 0.3m to 0.2m.

[0032] According to the foregoing principle, sewage flows from upstream to downstream through the gap 40 arranged at the bottom of the partition wall 4, and in the preferred embodiment, the height of the gap 40 arranged at the bottom of the partition wall 4 is 10-50 cm. The height is arranged to ensure the efficient flow of sewage and the stability of the partition wall 4.

[0033] In order to reduce the erosion of the surface filler by rain, in other embodiments, a coconut shell cushion layer can be covered on the top of the filler, and preferably, the thickness of the coconut shell cushion layer is 5-10 cm.

[0034] In addition, in other embodiments, the stepped wetland structure can further comprise a pre-heating device 5 for heating sewage, and the pre-heating device 5 is in communication with the inflow channel 2. The pre-heating device 5 can improve the temperature of the sewage, so as to ensure that the plants in the vegetation layer of the stepped wetland structure can survive even in winter.

[0035] The above describes the present application and its embodiments in a schematic manner, and the description is not limited, and the embodiments shown in the drawings are only one of the embodiments of the present application, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by the present application, without departing from the creative purpose of the present application, similar structural modes and embodiments can be designed without creativity, which should belong to the protection scope of the present application.

Claims

1. A stepped wetland structure, characterised in that, The application relates to a box-shaped body (1) comprising a top opening, wherein two ends of the box-shaped body (1) are respectively provided with an inflow channel (2) and an outflow channel (3), and the box-shaped body (1) comprises an inflow area (10), n step-by-step purification areas (11) and an outflow area (12), wherein n is a positive integer. The inflow area (10), the step-by-step purification areas (11) and the outflow area (12) are all provided with a spacing wall (4) between the inflow area (10) and the adjacent step-by-step purification area (11), between the adjacent step-by-step purification areas (11) and between the outflow area (12) and the adjacent step-by-step purification area (11), and the bottom of the spacing wall (4) is provided with a gap (40) for communication between the inflow area (10), the n step-by-step purification areas (11) and the outflow area (12). The inflow area (10) comprises a first bottom surface (101), and a first partition wall (102) is fixedly arranged on the first bottom surface (101), so that the inflow area (10) is divided into a first cavity (103) and a second cavity (104), and the inflow channel (2) is communicated with the first cavity (103). The step-by-step purification area (11) comprises a second bottom surface (111), and a second partition wall (112) is fixedly arranged on the second bottom surface (111), so that the step-by-step purification area (11) is divided into a third cavity (113) and a fourth cavity (114). The outflow area (12) comprises a third bottom surface (121), and a third partition wall (122) is fixedly arranged on the third bottom surface (121), so that the outflow area (12) is divided into a fifth cavity (123) and a sixth cavity (124), and the outflow channel (3) is communicated with the sixth cavity (124). The heights of the first bottom surface (101), the second bottom surface (111) and the third bottom surface (121) are gradually reduced, and when n is greater than 1, the height of the second bottom surface (111) gradually reduces from the inflow channel (2) to the outflow channel (3). Fillers are stacked in the inflow area (10), the n step-by-step purification areas (11) and the outflow area (12), and a vegetation layer is arranged on the top of the fillers.

2. A stepped wetland structure according to claim 1, characterised in that, The top elevation of each spacing wall (4) is higher than the top elevation of the adjacent first partition wall (102), second partition wall (112) and third partition wall (122).

3. A stepped wetland structure according to claim 1, characterised in that, The top of each of the first partition wall (102), the second partition wall (112) and the third partition wall (122) is provided with a notch.

4. A stepped wetland structure according to claim 1, characterised in that, The depth of the inflow area (10), the n step-by-step purification areas (11) and the outflow area (12) is 0.3m to 0.2m.

5. A stepped wetland structure according to claim 1, characterised in that, The height of the gap (40) arranged at the bottom of the spacing wall (4) is 10cm to 50cm.

6. A stepped wetland structure according to claim 1, characterised in that, The surface of the fillers is covered with a coconut shell cushion layer.

7. A stepped wetland structure according to claim 6, characterised in that, The thickness of the coconut shell cushion layer is 5cm to 10cm.

8. A stepped wetland structure according to claim 1, characterised in that, A preheating device (5) is further arranged, and the preheating device (5) is used for heating sewage and is communicated with the inflow channel (2).

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