CN210176575U - Strengthened non-blocking vertical subsurface flow constructed wetland - Google Patents
Strengthened non-blocking vertical subsurface flow constructed wetland Download PDFInfo
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- CN210176575U CN210176575U CN201920576615.7U CN201920576615U CN210176575U CN 210176575 U CN210176575 U CN 210176575U CN 201920576615 U CN201920576615 U CN 201920576615U CN 210176575 U CN210176575 U CN 210176575U
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Abstract
The utility model discloses a reinforced non-blocking vertical subsurface flow constructed wetland, which comprises a plurality of wetland units, wherein each wetland unit comprises a bed layer structure, a water inlet and outlet system and a drainage system, and the bed layer structure comprises a side wall, an impermeable layer and a plurality of packing layers arranged on the impermeable layer; the water inlet ends of a main water inlet pipe and a water distribution pipe network of the water inlet and outlet system are connected to two ends of a water inlet three-way control valve, the other end of the water inlet three-way control valve is connected with one end of a water collecting pipe network through an auxiliary water inlet pipe and a water inlet control valve, the other end of the water collecting pipe network and a main water outlet pipe are connected to two ends of a water outlet three-way control valve, and the water outlet end of the water distribution pipe network is connected with the other end of the water outlet three-way control valve through a water outlet; the evacuation system comprises an evacuation pipe network and an evacuation valve arranged at the output end of the evacuation pipe network; the water distribution pipe network is distributed in the top layer packing layer, the water collection pipe network is distributed in the bottom layer packing layer, and the emptying pipe network is arranged below the bottom layer packing layer. The utility model discloses can guarantee the long-term steady operation of wetland unit.
Description
Technical Field
The utility model relates to an artificial wetland, in particular to a reinforced non-blocking vertical subsurface flow artificial wetland.
Background
The artificial wetland is a sewage treatment ecological engineering technology developed in the 70 s of the 20 th century. After more than forty years of development, the artificial wetland has both the sewage purification treatment function and the ecological environment beautifying function, is widely applied to the fields of micro-sewage treatment, domestic sewage (deep) treatment, lake pollution prevention and control and the like, and is considered to be one of the most important ecological infrastructures for ecological civilization construction and sponge city construction.
However, the practical problems of poor sewage treatment effect, easy blockage of filler and the like generally exist in the application of artificial wetland engineering in China, and the reinforced non-blocked artificial wetland needs to be provided urgently.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to overcome the not enough of prior art, provide a can long-term steady operation strengthen stifled type vertical subsurface flow constructed wetland.
In order to solve the technical problem, the utility model discloses a following technical scheme: a reinforced non-blocking vertical subsurface flow constructed wetland comprises a plurality of wetland units, wherein each wetland unit comprises a bed layer structure, a water inlet and outlet system and a drainage system, and the bed layer structure comprises side walls arranged on the periphery, an impermeable layer arranged at the bottom and a plurality of filler layers arranged on the impermeable layer; the water inlet and outlet system comprises a main water inlet pipe, a water distribution pipe network provided with through holes and a water collection pipe network, wherein the water inlet ends of the main water inlet pipe and the water distribution pipe network are connected to two ends of a water inlet three-way control valve, the other end of the water inlet three-way control valve is connected with one end of the water collection pipe network through an auxiliary water inlet pipe and a water inlet control valve, the other end of the water collection pipe network and a main water outlet pipe are connected to two ends of a water outlet three-way control valve, and the water outlet end of the water distribution pipe network is connected with the other end of the water outlet three-; the emptying system comprises an emptying pipe network with a groove uniformly formed in the top and an emptying valve arranged at the output end of the emptying pipe network; the water distribution pipe network is distributed in a top layer filler layer of the bed layer structure, the water collection pipe network is distributed in a bottom layer filler layer of the bed layer structure, and the emptying pipe network is arranged below the bottom layer filler layer.
Through long-term engineering research, process research, operation practice and analysis summary, the applicant finds that the problems of poor sewage treatment effect and easy blockage of the filler are caused by the fact that the artificial wetland water inlet system is not uniform in water distribution, unreasonable in filler selection and grading, unreasonable in aquatic plant configuration, the wetland interior anaerobic operation condition, the long-term accumulation of sediments, trapped matters and biomembranes peeled off from the surfaces of the fillers in the wetland and the like. Therefore, the utility model discloses a with water distribution pipe network, the collector pipe network in the wetland unit through two water pipe and two tee bend control valve intercommunications of assisting to through a plurality of operating valve control rivers trend, realize the function switch of water distribution pipe network and collector pipe network, thereby convert the undercurrent wetland of descending into the undercurrent wetland of going upward, realize the backwash to the filler. Therefore, water distribution in a normal mode and a back flush mode is arranged in the wetland unit, and a water inlet system and a water outlet system of the artificial wetland are optimized and improved. Additionally, the utility model discloses set up more than 3 packing layers and reasonable filler gradation in wetland unit and increaseed wetland bed structure's depth of operation, cross-sectional area and ensured the space between the filler, created great living space for the microorganism of performance sewage purification effect. The emptying valve is connected to the output end of the emptying pipe network in cooperation with the operation of the emptying system, so that precipitates, intercepted matters, biomembranes peeled off from the surfaces of the fillers, impurities eluted by backwashing and the like generated in the operation of the wetland can be quickly and effectively discharged, the blockage of the fillers is prevented, and finally, the wetland unit can operate for a long time without blockage.
Furthermore, the thickness of the packing layers is 0.3-0.5 m, and the total thickness of the packing layers is 1.0-1.5 m.
Furthermore, the filler of each filler layer is a crushed stone mixed filler which is one or more of limestone, granite, zeolite and quartz sand, the filler particle size of the middle filler layer is the minimum, and the filler particle sizes of the filler layers positioned at the two sides of the middle filler layer are gradually increased compared with the filler particle size of the middle filler layer.
Furthermore, the impermeable layer is laid on the tamped plain soil and consists of two geotechnical impermeable films with one film and sand protective layers positioned above and below the geotechnical impermeable films.
Further, the filler particle size range of the intermediate filler layer is 15-30 mm; the filler particle size range of the filler layers positioned at the two sides of the middle filler layer is 35-50 mm.
Furthermore, the section of the bottom packing layer is W-shaped, the center of the bottom packing layer is provided with an installation position of an emptying pipe, the emptying pipe is buried in the installation position of the emptying pipe in the bottom packing, and a groove-shaped funnel type structure on an emptying pipe network is utilized to collect impurities such as suspended matters.
Furthermore, aquatic plants are planted in the surface layer filler of the top layer filler layer to increase the attractiveness.
Furthermore, the integral structure of the water inlet three-way operation valve and the water outlet three-way control valve is T-shaped, and the auxiliary water inlet pipe and the auxiliary water outlet pipe are both vertically arranged.
Furthermore, the output end of the evacuation pipe network is provided with an evacuation pump, so that precipitates, intercepted matters, biomembranes peeled off from the surfaces of the fillers, impurities eluted by backwashing and the like generated in the operation of the wetland can be rapidly and effectively discharged, the fillers are prevented from being blocked, and finally the wetland unit is operated without being blocked.
Drawings
Fig. 1 is a schematic structural view of the reinforced non-blocking vertical subsurface flow constructed wetland.
Fig. 2 is a schematic structural diagram of the water inlet and outlet system and the emptying system of the present invention.
Fig. 3 is a cross-sectional view of the bed structure and the emptying system of the present invention.
In the figure: the water supply system comprises a main water inlet pipe 1, a water inlet three-way control valve 2, a water distribution pipe network 3, an auxiliary water inlet pipe 4, a water inlet control valve 5, a water collecting pipe network 6, a water outlet control valve 7, an auxiliary water outlet pipe 8, a water outlet three-way control valve 9, a main water outlet pipe 10, an emptying pipe 11, a side wall 12, an anti-seepage layer 13, a top layer packing layer 14, a middle layer packing layer 15 and a bottom layer packing layer 16.
Detailed Description
The invention is further described below with reference to specific preferred embodiments, without thereby limiting the scope of protection of the invention.
For convenience of description, the description of the relative position of the components (e.g., up, down, left, right, etc.) is described with reference to the layout direction of the drawings, and does not limit the structure of the patent.
Example 1:
as shown in fig. 1-3, an embodiment of the reinforced non-blocking vertical subsurface flow constructed wetland of the present invention comprises a plurality of wetland units, and each wetland unit comprises a bed structure, a water inlet and outlet system and an evacuation system.
The bed layer structure comprises side walls 12 arranged on the periphery, an impermeable layer 13 arranged at the bottom and a plurality of filler layers arranged on the impermeable layer 13. The impermeable layer 13 is laid on the tamped plain soil, and the impermeable layer 13 consists of two geotechnical impermeable films which are covered by one film and sand protective layers which are positioned above and below the geotechnical impermeable films. The plurality of packing layers are at least 3 packing layers, namely at least comprising a top packing layer 14, a middle packing layer 15 and a bottom packing layer 16, the thickness of each packing layer is 0.3-0.5 m, and the total thickness of the plurality of packing layers is 1.0-1.5 m. The filler of each packing layer is a crushed stone mixed filler consisting of one or more of limestone, granite, zeolite and quartz sand, and the filler of the middle packing layer has the smallest particle size, wherein the particle size range is 15-30 mm; the filler particle size of the filler layers positioned at the two sides of the middle filler layer is gradually increased compared with that of the filler layer at the middle filler layer, and the particle size range is 35-50 mm. The section of the bottom filler layer 16 is W-shaped, so that the center of the bottom filler layer forms an installation position of an emptying pipe.
The surface layer filler of the top layer filler layer is planted with aquatic plants, and the aquatic plants are one or more than two of canna, reed, cattail, yellow flag, thalictrum, loosestrife, juncus effuses, zizania aquatica, drooping umbrella grass and saxifrage.
The water inlet and outlet system comprises a main water inlet pipe 1, a water distribution pipe network 3 and a water collection pipe network 6, wherein the water inlet ends of the water inlet pipe 1 and the water distribution pipe network 3 are connected to two ends of a water inlet three-way control valve 2, the other end of the water inlet three-way control valve 2 is connected to one end of the water collection pipe network 6 through an auxiliary water inlet pipe 4 and a water inlet control valve 5, the other end of the water collection pipe network 6 and a main water outlet pipe 10 are connected to two ends of a water outlet three-way control valve 9, and the water outlet end of the water distribution pipe network 3 is connected to the other end of the water outlet three-way control. The water distribution pipe network 3 is distributed in a top packing layer 14 of the bed structure, the water collecting pipe network 6 is distributed in a bottom packing layer 16 of the bed structure, however, the water inlet end and the water outlet end of the water distribution pipe network 3 and the water collecting pipe network 6 extend out of the wetland unit, and the water pipes of the water distribution pipe network 3 and the water collecting pipe network 6 in the wetland unit are uniformly perforated, so that the packing layer in the wetland unit is uniformly distributed with water. The main water inlet pipe 1, the main water outlet pipe 10, the auxiliary water inlet pipe 4 and the auxiliary water outlet pipe 8 are all arranged outside the wetland unit, and the main water inlet pipe 1, the main water outlet pipe 10, the auxiliary water inlet pipe 4 and the auxiliary water outlet pipe 8 are not provided with holes and are only used for water passing. In this embodiment, the water inlet three-way operation valve 2 and the water outlet three-way control valve 9 have three water inlet ends and three water outlet ends respectively, the water inlet ends and the water outlet ends can be controlled to open and close respectively, the integral structures of the water inlet three-way operation valve 2 and the water outlet three-way control valve 9 are T-shaped, and the auxiliary water inlet pipe 4 and the auxiliary water outlet pipe 8 are both vertically arranged.
The evacuation system comprises an evacuation pipe network 11 and an evacuation valve (not shown in the figure), the evacuation pipe network 11 is arranged at the installation position of the evacuation pipe under the bottom packing layer 16, the output end of the evacuation pipe network 11 passes through the side wall 12 and then is drained outwards, the evacuation valve is arranged at the output end of the evacuation pipe network 11, the top pipe surface of the evacuation pipe is uniformly grooved, the sediments in the wetland unit are collected through the notch, the evacuation valve is opened, the liquid in the evacuation pipe network 11 can automatically flow out of the wetland unit, and of course, an evacuation pump can also be arranged at the output end of the evacuation pipe network 11.
The utility model discloses during the use, under the normal mode, through 2 control rivers of tee bend operation valve of intaking 1 main inlet tube of water inlet pipe network 3, water distribution network 3 is to wetland unit water distribution, and water inlet control valve 5, play water control valve 7 are closed, and 6 even catchments of water collection pipe network, and through 9 control rivers of play water tee bend operation valve 6 main outlet pipes 10 of getting into of water collection pipe network, outflow wetland unit.
Under the back washing mode, the water flow is controlled to enter the auxiliary water inlet pipe 4 from the main water inlet pipe 1 through the water inlet three-way operation valve 2, the water inlet control valve 5 and the water outlet control valve 7 are both opened, the water is uniformly distributed to the wetland units through the water collecting pipe network 6, the water is uniformly collected to the wetland units through the water distributing pipe network 3, and the water flow is controlled to enter the main water outlet pipe 10 from the auxiliary water outlet pipe 8 and flow out of the wetland units through the water outlet three-way operation valve 9.
Under a normal mode and a back flush mode, the emptying pipe network 11 collects sediments, trapped matters, biomembranes peeled off from the surface of the filler and impurities eluted by the back flush generated in the operation of the wetland unit, and after the sediments are collected for a period of time, an emptying valve or an emptying pump is opened to effectively discharge the impurities collected by the emptying pipe network 11, so that the filler is prevented from being blocked, and finally the wetland unit operates without being blocked.
The design scale of a certain sewage treatment plant in middle cities of China is 4 ten thousand tons/day, a sewage regeneration combined process of 'MSBR + artificial wetland' is adopted, and the MSBR secondary biochemical primary B standard effluent is further purified to a primary A discharge standard through the artificial wetland. This constructed wetland adopts a compound constructed wetland processing system for nitrogen and phosphorus removal, and this processing system includes the tertiary compound constructed wetland of establishing ties each other, wherein the one-level compound constructed wetland by the good oxygen biological pond of one-level with perpendicular undercurrent constructed wetland constitute. The sewage treatment plant (including the artificial wetland) has been stably operated for 6 years, and the artificial wetland has no filler blockage. In 2017, the daily average treated water amount of the sewage treatment plant (including the artificial wetland) is 4.6 ten thousand tons/day, and the daily average inlet and outlet water quality monitoring data of the vertical subsurface flow artificial wetland is as follows: the quality of inlet water is about COD 29.5mg/L, SS 16mg/L, TN 18.5.5 mg/L, TP 0.75.75 mg/L, and the quality of outlet water is about COD 20.5mg/L, SS 9mg/L, TN 15.6.6 mg/L and TP0.57mg/L.
The above description is only for the preferred embodiment of the present application and should not be taken as limiting the present application in any way, and although the present application has been disclosed in the preferred embodiment, it is not intended to limit the present application, and those skilled in the art should understand that they can make various changes and modifications within the technical scope of the present application without departing from the scope of the present application, and therefore all the changes and modifications can be made within the technical scope of the present application.
Claims (9)
1. A strengthened non-blocking vertical subsurface flow constructed wetland comprises a plurality of wetland units, wherein each wetland unit comprises a bed layer structure, a water inlet and outlet system and a drainage system, and is characterized in that the bed layer structure comprises side walls (12) arranged on the periphery, an impermeable layer (13) arranged at the bottom and a plurality of packing layers arranged on the impermeable layer; the water inlet and outlet system comprises a main water inlet pipe (1), a water distribution pipe network (3) with through holes and a water collection pipe network (6), wherein the water inlet ends of the main water inlet pipe and the water distribution pipe network are connected to two ends of a water inlet three-way control valve (2), the other end of the water inlet three-way control valve is connected to one end of the water collection pipe network through an auxiliary water inlet pipe (4) and a water inlet control valve (5), the other end of the water collection pipe network and a main water outlet pipe (10) are connected to two ends of a water outlet three-way control valve (9), and the water outlet end of the water distribution pipe network is connected to the other end of the water outlet three-way control valve through a water outlet; the emptying system comprises an emptying pipe network (11) with a groove uniformly formed in the top and an emptying valve arranged at the output end of the emptying pipe network; the water distribution pipe network is distributed in a top packing layer (14) of the bed layer structure, the water collection pipe network is distributed in a bottom packing layer (16) of the bed layer structure, and the emptying pipe network is arranged below the bottom packing layer.
2. The reinforced non-blocking vertical subsurface flow constructed wetland according to claim 1, wherein the filler of each filler layer is a crushed stone mixed filler, the filler particle size of the middle filler layer is the smallest, and the filler particle sizes of the filler layers positioned at the two sides of the middle filler layer are gradually increased compared with the filler particle size of the middle filler layer.
3. The reinforced non-blocking vertical subsurface flow constructed wetland according to claim 2, wherein the filler particle size range of the intermediate filler layer is 15-30 mm; the filler particle size range of the filler layers positioned at the two sides of the middle filler layer is 35-50 mm.
4. The reinforced non-blocking vertical subsurface flow constructed wetland according to claim 1, wherein the impermeable layer is laid on the compacted plain soil and consists of two geotextile impermeable films and sand protective layers positioned above and below the geotextile impermeable films.
5. The reinforced non-blocking vertical subsurface flow constructed wetland according to claim 1, wherein the thickness of the packing layers is 0.3-0.5 m, and the total thickness of the packing layers is 1.0-1.5 m.
6. The reinforced non-blocking vertical subsurface flow constructed wetland according to claim 1, wherein the section of the bottom filler layer is W-shaped, the center of the bottom filler layer is provided with an installation position of an emptying pipe, and the emptying pipe of the emptying pipe network is buried at the installation position of the emptying pipe.
7. The enhanced non-blocking vertical subsurface flow constructed wetland according to claim 1, wherein aquatic plants are planted in the surface filler of the top filler layer.
8. The reinforced non-blocking vertical subsurface flow constructed wetland as recited in claim 1, wherein the integral structure of the three-way operation valve for water inlet and the three-way control valve for water outlet is T-shaped, and the auxiliary water inlet pipe and the auxiliary water outlet pipe are both vertically arranged.
9. The enhanced non-blocking vertical subsurface flow constructed wetland according to claim 1, wherein an evacuation pump is arranged at the output end of the evacuation pipe network.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920576615.7U CN210176575U (en) | 2019-04-25 | 2019-04-25 | Strengthened non-blocking vertical subsurface flow constructed wetland |
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| CN201920576615.7U CN210176575U (en) | 2019-04-25 | 2019-04-25 | Strengthened non-blocking vertical subsurface flow constructed wetland |
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| CN210176575U true CN210176575U (en) | 2020-03-24 |
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