Subsurface flow ecological purification ditch

Abstract

The subsurface flow ecological purification ditch comprises a purification ditch body, the purification ditch body is sequentially provided with a waterproof layer, a gravel layer, a multi-gap solid substrate layer and a planting soil layer from bottom to top, and the planting soil layer is used for planting hygrophytes; the device further comprises a water collecting pipe, the water collecting pipe is laid in the gravel layer, the end of the water collecting pipe extends out of a purification ditch, and a plurality of water collecting holes are formed in the pipe wall of the water collecting pipe in the length direction at intervals. The device has the effect of treating the water body in a long and narrow space environment.

Description

Technical Field

[0001] The present application relates to the field of ecological environment technology, and in particular to a subsurface ecological purification ditch. Background Art

[0002] At present, the most commonly used and effective measure for ecological purification of water environment is to build artificial wetlands. However, the construction of artificial wetlands requires a large plane space, which makes the promotion of artificial wetlands have certain limitations, resulting in limitations in the ecological purification of water environment. Utility Model Content

[0003] In order to be able to treat water in a narrow and long space environment, the present application provides a subsurface ecological purification ditch.

[0004] A subsurface ecological purification ditch provided in the present application adopts the following technical solution: a subsurface ecological purification ditch, comprising a purification ditch, wherein the purification ditch is provided with a waterproof layer, a gravel layer, a multi-porous solid matrix layer, and a planting soil layer from bottom to top, and the planting soil layer is used to plant wetland plants; and also comprises a water collecting pipe, wherein the water collecting pipe is laid in the gravel layer, and the end of the water collecting pipe extends out of the purification ditch body, and a plurality of water collecting holes are spaced apart on the pipe wall in the length direction of the water collecting pipe.

[0005] By adopting the above technical scheme, a waterproof layer is set in the purification ditch so that water can be normally stored in the ditch, ensuring the continuous survival of microorganisms in the purification ditch and the luxuriant growth of wetland plants on the upper part, and forming a bacterial bed through a multi-porous solid matrix layer, thereby providing a good growth environment for microorganisms. The water collection pipe covered with gravel can allow water to enter the pipe smoothly and then be discharged, thereby forming a three-dimensional ecological purification space, thereby solving the problem of water purification in narrow and long spaces.

[0006] Preferably, the waterproof layer includes, from bottom to top, a plain soil layer, a coarse sand cushion layer, a cement mortar protective layer, and a waterproof blanket, and the waterproof blanket is laid in the coarse sand cushion layer.

[0007] By adopting the above technical solution, the bottom layer of bare soil is compacted, and then coarse sand is laid, and then a waterproof blanket is attached, and then a coarse sand and cement mortar protective layer is laid on top, thereby improving the structural strength of the permeable layer and improving the waterproof effect at the same time.

[0008] Preferably, a permeable geotextile layer is further included, and the permeable geotextile layer is located between the porous solid matrix layer and the planting soil layer.

[0009] By adopting the above technical solution, the permeable geotextile layer has excellent filtering, isolation, reinforcement and protection functions, thereby improving the overall structural stability of the planting soil layer.

[0010] Preferably, it further includes a water collecting pool and a water retaining dam, wherein the water collecting pool is arranged at one end of the purification ditch and is separated by the water retaining dam, and the water collecting pipe passes through the water retaining dam and extends into the water collecting pool; multiple purification ditches are arranged along the length direction, the water collecting pool is located between the two purification ditches, and the height of the purification ditch gradually decreases along the length direction.

[0011] By adopting the above technical scheme, since the purification ditch area needs to maintain a horizontal height for water storage and purification, the setting of the water collection pool can adjust the height difference of the terrain of the site in sections; at the same time, after the ecological purification ditch is used for a long time, the water collection pipe will inevitably be blocked by silt, and the water collection pool can be used as the silt removal outlet of the water collection pipe.

[0012] Preferably, the water outlet of the water collecting pipe is connected to an overflow pipe via a joint, and the pipe mouth height of the overflow pipe is lower than the height of the planting soil layer.

[0013] By adopting the above technical solution, the water collecting pipe is connected with an upward overflow pipe, so that the water purified by the purification ditch is gradually discharged, while reducing the disturbance of the sludge in the water collecting tank.

[0014] Preferably, the water outlet of the water collecting pipe is connected to a valve via a joint, and the water inlet of the water collecting pipe is connected to an extension pipe via a joint, and the extension pipe extends out of the planting soil layer.

[0015] By adopting the above technical solution, the silt in the water collecting pipe can be easily removed by means of a valve arranged at the water outlet of the water collecting pipe, and water can be injected into the water collecting pipe through the extension pipe to further flush the pipe wall, thereby facilitating the unblocking of the water collecting pipe.

[0016] Preferably, the tube opening cover of the extension tube is provided with a tube cover.

[0017] By adopting the above technical solution, under normal circumstances, the pipe opening of the extension pipe is covered by the pipe cover, thereby preventing foreign debris from entering the water collecting pipe and affecting normal water purification.

[0018] Preferably, at least two water collecting pipes are laid at intervals in the purification ditch.

[0019] By adopting the above technical solution, at least two water collecting pipes are laid in the purification ditch, thereby improving the efficiency of purification and discharge of water in the purification ditch.

[0020] Preferably, the ditch wall of the purification ditch is paved with a block wall, and the waterproof blanket is clamped in the block wall.

[0021] By adopting the above technical solution, the structural strength of the purification ditch is improved by setting the block wall on the side wall of the purification ditch, and the waterproof blanket is set in the block wall to improve the water storage capacity of the overall purification ditch.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] By setting a waterproof layer in the purification ditch, water can be stored normally in the ditch, ensuring the continued survival of microorganisms in the purification ditch and the luxuriant growth of wetland plants above it, and forming a bacterial bed through a multi-porous solid matrix layer, thus providing a good growth environment for microorganisms. The gravel-covered water collection pipe can allow water to enter the pipe smoothly and then be discharged, thus forming a three-dimensional ecological purification space, thereby solving the problem of water purification in narrow and long spaces. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the cross-sectional structure of the subsurface ecological purification ditch in the embodiment of the present application;

[0025] Figure 2 It is a schematic diagram of the planar structure of the subsurface ecological purification ditch in the embodiment of the present application.

[0026] Explanation of the reference numerals: 1. purification ditch; 11. waterproof layer; 111. bare soil layer; 112. coarse sand cushion layer; 113. waterproof blanket; 114. block wall; 12. gravel layer; 13. porous solid matrix layer; 14. permeable geotextile layer; 15. planting soil layer; 2. water collecting pipe; 21. water collecting hole; 3. water collecting pool; 31. water retaining dam; 4. overflow pipe; 5. valve; 6. extension pipe; 7. pipe cover. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1-2 This application is described in further detail.

[0028] The present application embodiment discloses a subsurface ecological purification ditch. Figure 1 The subsurface ecological purification ditch includes a purification ditch 1, a water collecting pipe 2, and a water collecting pool 3. The purification ditch 1 is narrow and long, and the water collecting pool 3 is arranged at one end of the purification ditch 1. The water collecting pipe 2 is horizontally laid in the purification ditch 1 and extends into the water collecting pool 3. A plurality of water collecting holes 21 are arranged on the pipe wall of the water collecting pipe 2 in the length direction. The water source is connected to the surface of the purification ditch 1, and the water body is purified through the purification ditch 1. The purified water body is discharged into the water collecting pool 3 through the water collecting pipe 2. The length, width and shape of the ecological purification ditch 1 can be appropriately adjusted according to the topography of the site. It can be curved or of different widths. The ditch wall can also be designed as a natural revetment-style tortuous form, as long as the bottom water collecting pipe 2 can pass through.

[0029] Reference Figure 1, and also includes a water retaining dam 31, which is arranged at one end of the purification ditch 1 to separate the water collection pool 3, and the water collection pipe 2 extends into the water collection pool 3 through the water retaining dam 31; multiple purification ditches 1 are arranged along the length direction, and the water collection pool 3 is located between two purification ditches 1, and the height of the purification ditch 1 gradually decreases along the length direction. Due to the need for water storage and purification, the water collection pool 3 needs to maintain a horizontal elevation in the purification ditch area, and the setting of the water collection pool 3 can adjust the height difference of the terrain of the site in sections; in addition, after the purification ditch 1 is used for a long time, the water collection pipe 2 will inevitably be blocked by silt, and the water collection pool 3 can be used as a silt removal outlet for the water collection pipe 2.

[0030] Specifically, the purification ditch 1 is provided with a waterproof layer 11, a gravel layer 12, a multi-porous solid matrix layer 13, a permeable geotextile layer 14, and a planting soil layer 15 from bottom to top. The waterproof layer 11 is used to strengthen the bottom structure strength and prevent leakage; the planting soil layer 15 is used to plant wet plants; and the water collection pipe 2 is laid in the gravel layer 12. By arranging the waterproof layer 11 in the purification ditch 1, water can be stored normally in the ditch, ensuring that the microorganisms in the purification ditch 1 continue to survive and the wet plants on the upper part can grow luxuriantly, and the multi-porous solid matrix layer 13 forms a bacterial bed, thereby providing a good growth environment for the microorganisms. The water collection pipe 2 covered with gravel can allow water to enter the pipe smoothly and then be discharged, thereby forming a three-dimensional ecological purification space, thereby solving the problem of water purification treatment in a narrow and long space.

[0031] The waterproof layer 11 includes a soil layer 111, a coarse sand cushion layer 112, and a cement mortar protective layer from bottom to top. The waterproof layer 11 also includes a waterproof blanket 113, which is laid in the coarse sand cushion layer 112. After the bottom soil layer is compacted, coarse sand is laid, and then the coarse sand and cement mortar protective layer are laid on the waterproof blanket 113, thereby improving the structural strength of the waterproof layer 11 and improving the waterproof effect.

[0032] Reference Figure 1 and Figure 2 The wall of the purification ditch 1 is paved with a block wall 114, the waterproof blanket 113 is sandwiched in the block wall 114, and the surface of the block wall 114 is plastered with cement mortar. The block wall 114 arranged on the side wall of the purification ditch 1 improves the structural strength of the purification ditch 1, and the waterproof blanket 113 arranged in the block wall 114 improves the water storage capacity of the overall purification ditch 1.

[0033] Reference Figure 1 and Figure 2 The outlet of the water collecting pipe 2 is connected to a vertically arranged overflow pipe 4 through a joint, and the pipe opening height of the overflow pipe 4 is lower than the height of the planting soil layer 15. The upward overflow pipe 4 is connected to the water collecting pipe 2, so that the purified water of the purification ditch 1 is gradually discharged, while reducing the disturbance of the sludge in the water collecting tank 3.

[0034] The water outlet of the water collecting pipe 2 is connected to a valve 5 through a joint, and the water inlet of the water collecting pipe 2 is connected to a vertical extension pipe 6 through a joint, and the extension pipe 6 extends out of the planting soil layer 15, and the pipe mouth cover of the extension pipe 6 is provided with a pipe cover 7. The valve 5 provided at the water outlet of the water collecting pipe 2 can facilitate the removal of silt in the water collecting pipe 2, and at the same time, water is poured into the extension pipe 6, so that the pipe wall of the water collecting pipe 2 can be further flushed, thereby facilitating the dredging of the water collecting pipe 2. Under normal circumstances, the pipe mouth of the extension pipe 6 is covered by the pipe cover 7, so as to prevent foreign debris from entering the water collecting pipe 2 and affecting the normal water purification.

[0035] Reference Figure 2 At least two water collecting pipes 2 are laid in the purification ditch 1 at intervals. In this embodiment, two water collecting pipes 2 are laid. At least two water collecting pipes 2 are laid in the purification ditch 1, thereby improving the purification and discharge efficiency of the water body in the purification ditch 1.

[0036] The implementation principle of the subsurface ecological purification ditch of the embodiment of the present application is as follows: the operating principle of the subsurface ecological purification ditch is to rely on the joint action of the matrix, microorganisms and wetland plants to achieve the removal of various pollutants in sewage, and the subsurface ecological purification ditch can be created in a variety of environmental spaces. Such as the green belts of municipal roads, the sides of park roads, the sides of rural roads or combined with road ditches, the surrounding areas of rivers, etc., can be constructed using some narrow strip spaces. At the same time, some urban parks or small waterways in cities, drainage ditches in township areas, etc. have a small daily drainage volume, but the water quality is relatively low. These areas are not suitable for the construction of artificial wetlands to purify them, and subsurface ecological purification ditches are very suitable for this type of small-scale space construction.

[0037] By setting a waterproof layer 11 in the purification ditch 1, water can be stored normally in the ditch, ensuring the continuous survival of the microorganisms in the purification ditch 1 and the luxuriant growth of the wetland plants on the upper part, and forming a fungal bed through the multi-porous solid matrix layer 13, thereby providing a good growth environment for the microorganisms. The water collection pipe 2 covered with gravel can allow water to enter the pipe smoothly and then be discharged, thereby forming a three-dimensional ecological purification space, thereby solving the problem of water purification treatment in narrow and long spaces.

[0038] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A subsurface ecological purification ditch, characterized by: The invention comprises a purification ditch (1), wherein the purification ditch (1) is provided with a waterproof layer (11), a gravel layer (12), a multi-porous solid matrix layer (13), and a planting soil layer (15) in sequence from bottom to top, wherein the planting soil layer (15) is used to plant wetland plants; and further comprises a water collecting pipe (2), wherein the water collecting pipe (2) is laid in the gravel layer (12), the end of the water collecting pipe (2) extends out of the purification ditch (1), and a plurality of water collecting holes (21) are spaced apart on the pipe wall in the length direction of the water collecting pipe (2).

2. The subsurface ecological purification ditch according to claim 1 is characterized by: The waterproof layer (11) comprises, from bottom to top, a plain soil layer (111), a coarse sand cushion layer (112), a cement mortar protective layer, and also comprises a waterproof blanket (113), wherein the waterproof blanket (113) is laid in the coarse sand cushion layer (112).

3. The subsurface ecological purification ditch according to claim 1 is characterized by: It also includes a permeable geotextile layer (14), which is located between the porous solid matrix layer (13) and the planting soil layer (15).

4. The subsurface ecological purification ditch according to claim 1 is characterized by: It also includes a water collection pool (3) and a water retaining dam (31), wherein the water collection pool (3) is arranged at one end of the purification ditch (1) and is separated by the water retaining dam (31), and the water collection pipe (2) passes through the water retaining dam (31) and extends into the water collection pool (3); a plurality of purification ditches (1) are arranged along the length direction, the water collection pool (3) is located between two purification ditches (1), and the height of the purification ditch (1) gradually decreases along the length direction.

5. The subsurface ecological purification ditch according to claim 4 is characterized by: The water outlet of the water collecting pipe (2) is connected to an overflow pipe (4) via a joint, and the height of the pipe opening of the overflow pipe (4) is lower than the height of the planting soil layer (15).

6. The subsurface ecological purification ditch according to claim 4 is characterized by: The water outlet of the water collecting pipe (2) is connected to a valve (5) via a joint, and the water inlet of the water collecting pipe (2) is connected to an extension pipe (6) via a joint, and the extension pipe (6) extends out of the planting soil layer (15).

7. The subsurface ecological purification ditch according to claim 6 is characterized by: The pipe opening cover of the extension pipe (6) is provided with a pipe cover (7).

8. The subsurface ecological purification ditch according to claim 1 is characterized by: At least two water collecting pipes (2) are laid at intervals in the purification ditch (1).

9. The subsurface ecological purification ditch according to claim 2 is characterized by: The ditch wall of the purification ditch (1) is paved with a block wall (114), and the waterproof blanket (113) is sandwiched in the block wall (114).

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