CN212476269U - Vertical subsurface flow constructed wetland suitable for low-temperature condition - Google Patents
Vertical subsurface flow constructed wetland suitable for low-temperature condition Download PDFInfo
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- CN212476269U CN212476269U CN202020163753.5U CN202020163753U CN212476269U CN 212476269 U CN212476269 U CN 212476269U CN 202020163753 U CN202020163753 U CN 202020163753U CN 212476269 U CN212476269 U CN 212476269U
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Abstract
The utility model discloses a vertical subsurface flow constructed wetland suitable for the condition of lower temperature, which comprises a vertical subsurface flow constructed wetland body and a pretreatment pool body which is buried underground and made of FRP materials, wherein the pretreatment pool body comprises a first bin, a second bin, a third bin and a fourth bin which are sequentially communicated through 90-degree elbows; the upper part of the first chamber is provided with a water inlet pipeline; the water inlet of the 90-degree elbow faces the bottom surface of the inner cavity of the upper-stage bin, and the water outlet of the 90-degree elbow is communicated with the inner cavity of the lower-stage bin; a sewage submersible pump is arranged in the fourth bin; a V-grade particle material layer, an IV-grade particle material layer, a III-grade particle material layer, a II-grade particle material layer and an I-grade particle material layer are sequentially arranged in the vertical subsurface flow constructed wetland body from bottom to top; a water collector is arranged in the V-level aggregate layer; a water distributor B is laid at the middle lower part of the II-level aggregate layer, and a water distributor A is laid at the surface of the I-level aggregate layer; plants are arranged on the surface of the I-grade granular material layer.
Description
Technical Field
The utility model belongs to the technical field of the water treatment, concretely relates to perpendicular undercurrent constructed wetland suitable for under the lower condition of temperature.
Background
The artificial wetland is used as an ecological sewage treatment technology for rural domestic sewage treatment. The artificial wetland is applied more in southern areas than in northern areas, and the main reason is that the influence of the environmental temperature on the artificial wetland is large, the freezing can cause the paralysis of the artificial wetland system, and the water treatment effect of the conventional artificial wetland can be greatly reduced even if the artificial wetland is not frozen in a low-temperature environment. The application environment of the conventional artificial wetland is above 5 ℃, and the limit value condition limit value of the conventional artificial wetland has the advantages that the operation and maintenance of the artificial wetland are simple, the water purification effect is good, and the water treatment technology with beautiful environment is widely popularized and applied.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the not enough of prior art, provide a perpendicular undercurrent constructed wetland suitable for the lower condition of temperature, mainly select through wetland preliminary treatment part, wetland water distribution mode, wetland aggregate material ratio innovation and reasonable building material, realize that the wetland can be applicable to lower temperature, widened constructed wetland's application scope.
In order to achieve the above purpose, the utility model provides a technical scheme does:
the vertical subsurface flow constructed wetland suitable for the condition of lower temperature comprises a vertical subsurface flow constructed wetland body (2) and a pretreatment tank body (1) which is buried underground and made of FRP materials; the pretreatment pool body (1) comprises a first bin (12), a second bin (13), a third bin (14) and a fourth bin (15) which are sequentially communicated through a 90-degree elbow (11); a water inlet pipeline is arranged at the upper part of the first chamber (12); the water inlet of the 90-degree elbow (11) faces the bottom surface of the inner cavity of the upper-stage bin, and the water outlet of the 90-degree elbow (11) is communicated with the inner cavity of the lower-stage bin; a submersible sewage pump (17) is arranged in the fourth bin (15); a V-grade distribution particle layer (22), an IV-grade distribution particle layer (23), a III-grade distribution particle layer (24), a II-grade distribution particle layer (25) and an I-grade distribution particle layer (26) are sequentially arranged in the vertical subsurface flow constructed wetland body (2) from bottom to top; a water collector (27) is arranged in the V-grade ingredient material layer (22); a water distributor B (28) is paved at the middle lower part of the II-level particle material layer (25), and a water distributor A (29) is paved on the surface of the I-level particle material layer (26); plants (210) are arranged on the surface of the I-grade ingredient particle layer (26); the submersible sewage pump (17) is communicated with the water distributor A (29) and the water distributor B (28) through pipelines.
Preferably, the first chamber (12) accounts for 35% of the volume of the pretreatment tank body (1); the second bin (13) accounts for 25% of the volume of the pretreatment tank body (1); the third bin (14) accounts for 25% of the volume of the pretreatment tank body (1); the fourth bin (15) accounts for 15% of the volume of the pretreatment tank body (1).
Preferably, the center of the water outlet of the 90-degree elbow (11) connecting the first secondary chamber (12) and the second chamber (13) is 800-1000mm away from the bottom surface of the inner cavity of the first chamber (12); the distance between the center of the water outlet of the 90-degree elbow (11) connecting the second secondary chamber (13) and the third chamber (14) and the bottom surface of the inner cavity of the second chamber (13) is 800-1000 mm; the center of the water outlet of the 90-degree elbow (11) connecting the third chamber (14) and the fourth chamber (15) is 1000-1500mm away from the bottom surface of the inner cavity of the third chamber (14).
Preferably, the tops of the first bin (12), the second bin (13), the third bin (14) and the fourth bin (15) are provided with access holes (16); the diameters of the access holes (16) at the tops of the first chamber (12) and the second chamber (13) are 500-600 mm; the diameters of the access holes (16) at the tops of the third chamber (14) and the fourth chamber (15) are 600-800 mm; the access hole (16) is connected with the bin through an FRP sleeve (18); a pipeline of the submersible sewage pump (17), the A water distributor (29) and the B water distributor (28) penetrates through the FRP sleeve (18) at the top of the fourth chamber (15); and a check valve (30) and a water distributor ball valve (31) are arranged on a pipeline communicated with the A water distributor (29) and the B water distributor (28) of the submersible sewage pump (17).
Preferably, the granules of the I-grade compound granule layer (26) adopt ceramsite with the grain diameter of 20-25mm, and the heat conductivity coefficient is 0.1W/m.K; the granules of the II-grade distribution granule layer (25) adopt ceramsite with the grain diameter of 10-15mm, and the heat conductivity coefficient is 0.12W/m.K; the granules of the III-grade distribution granule layer (24) adopt ceramic granules with the grain diameter of 5-8mm, and the heat conductivity coefficient is 0.15W/m.K; the aggregate of the IV-level ingredient aggregate layer (23) adopts sandstone and melon seed slices; the granules of the V-grade compound granule layer (22) adopt sand and/or melon seed slices.
More preferably, the thickness of the I-grade distribution particle layer (26) is 150-200 mm; the thickness of the II-grade distribution particle layer (25) is 200-350 mm; the thickness of the III-level grading particle layer (24) is about 200-250 mm; the thickness of the IV-level grading particle layer (23) is 200-250 mm; the thickness of the V-level grading particle layer (22) is 200-300 mm; the total thickness of the V-level grading particle layer (22), the IV-level grading particle layer (23), the III-level grading particle layer (24), the II-level grading particle layer (25) and the I-level grading particle layer (26) is 1350-.
Preferably, the plants (210) are Siberian iris and Iris pseudacorus.
Preferably, the water distributor A (29) comprises a main pipe A (291) circularly arranged in the vertical subsurface flow constructed wetland body (2) and a plurality of rows of perforated pipes A (292) which are arranged in parallel and communicated with the main pipe A (291); the rows of the perforated pipes (292) are parallel to the direction of the water flow entering the vertical subsurface flow constructed wetland; the water distributor B (28) comprises a main water distributor B pipe (281) circularly arranged in the vertical subsurface flow constructed wetland body (2), a plurality of rows of perforated pipes B (282) which are arranged in parallel and communicated with the main water distributor B pipe (281), and a plurality of columns of perforated pipes C (283) which are arranged in parallel and penetrate through the perforated pipes B (282) and are simultaneously communicated with the perforated pipes B (282) and the main water distributor B pipe (281); and the rows of the perforated pipes (281) are parallel to the direction of the water flow entering the vertical subsurface flow constructed wetland.
More preferably, the distance between the two adjacent A perforated pipes (291) is 800-; the distance between two adjacent B perforated pipes (282) is 400-600mm, a group of openings are arranged on the B perforated pipes (282) at intervals of 400-600mm, each group of openings comprises a left opening and a right opening, and the opening diameter is 2 +/-0.05 mm; the distance between the two adjacent C perforated pipes (283) is 400-600mm, a group of openings is arranged on the C perforated pipes (283) every 400-600mm, each group of openings comprises a left opening and a right opening, and the opening diameter is 2 +/-0.05 mm.
Preferably, the vertical subsurface flow constructed wetland body (2) further comprises a wetland retaining wall (21).
The following further description of the present invention:
the utility model discloses in, the perpendicular undercurrent wetland system of type of preventing frostbite mainly comprises pretreatment tank and the perpendicular undercurrent wetland two parts of type of preventing frostbite, and the functional structure of above-mentioned two parts is built and is connected through pressure water pipeline.
A pretreatment tank: the pretreatment pool is made of FRP, has a thickness of more than 14mm and is provided with 4 bins. First bin accounts for 35% of the total volume of pretreatment pond, first bin is connected with outside inlet tube, inlet opening size 350mm, first bin is connected through 90 elbows with the second bin, 90 elbows set up in first bin, perpendicular about 400 + 600mm downwards, 90 elbows horizontal center-distance pretreatment pond bottom of the pool is about 800 + 1000mm, first bin is equipped with the access hole, access hole diameter 500 + 600mm, be provided with mixed resin apron, the access hole with pass through FRP muffjoint with the pretreatment pond. The second bin accounts for 25% of the total volume of the pretreatment tank, the second bin is connected with the third bin through a 90-degree elbow, the 90-degree elbow is arranged in the second bin and vertically faces downwards for about 400-1000 mm, the horizontal center of the 90-degree elbow is about 800-1000mm away from the bottom of the pretreatment tank, the second bin is provided with an access hole, the diameter of the access hole is 500-600mm away from the bottom of the pretreatment tank, a mixed resin cover plate is arranged, and the access hole is connected with the pretreatment tank through an FRP sleeve. The third bin accounts for 25% of the total volume of the pretreatment tank, the third bin is connected with the fourth bin through a 90-degree elbow, the 90-degree elbow is arranged in the third bin and vertically faces downwards for about 400-1500 mm, the horizontal center of the 90-degree elbow is about 1000-1500mm away from the bottom of the pretreatment tank, the third bin is provided with an access hole, the diameter of the access hole is 600-800mm, and a mixed resin cover plate is arranged and connected with the pretreatment tank through an FRP (fiber reinforced plastic) sleeve. The fourth bin accounts for 15% of the total volume of the pretreatment tank, the fourth bin is provided with an access hole, the diameter of the access hole is 600-800mm, the access hole is provided with a mixed resin cover plate, and the access hole is connected with the pretreatment tank through an FRP sleeve. A sewage submersible pump is arranged in the fourth bin to lift the sewage in the fourth bin to the anti-freezing vertical underflow chamber. The flow value of the subsurface-soil pump is the same as the daily treatment scale of the anti-freezing vertical subsurface-flow wetland system. And the water outlet pipe of the pretreatment tank is provided with a hole on the FRP sleeve of the fourth bin.
The anti-freezing vertical subsurface flow wetland comprises the following steps: the anti-freezing vertical subsurface flow wetland mainly comprises a wetland retaining wall, wetland plants, a water distributor and graded aggregateAnd a water collector and the like 5. Wherein the core part is a water distributor, graded aggregate and a water collector. The wetland retaining wall is mainly built by aerated light building blocks, and the building thickness is 500 mm. The total height of the wetland retaining wall is 1500mm, wherein the underground is 1400mm, and the overground is 100 mm. The wetland plants adopt perennial Siberian iris and yellow flag, and the planting density is about 20 plants/m2If the landscape effect is considered, the planting density of the two plants can be increased on the premise of ensuring the planting density. The two plants are selected, and have four main functions, namely, oxygen is provided for the interior of the wetland, inorganic ions in water are absorbed, carriers are provided for the growth of microorganisms in the wetland, and the beautifying function is achieved.
The water distributors are 2 sets, and the water distributor A and the water distributor B are opened and closed according to the ambient temperature so as to meet the operation requirement of the wetland. The water distributor B is about 500mm below the water distributor A, the water distributor A is arranged on the surface of the wetland graded aggregate, and the water distributor B is arranged at the middle lower part of the second-level graded aggregate and is about 500mm away from the surface of the graded aggregate. When the pretreatment tank conveys sewage to the water distributors, the sewage passes through the two water distributor ball valves, and one water distributor is respectively arranged in each of the two sets of water distributors.
The water distributor A adopts circulating perforation water distribution and mainly comprises a main pipe of the water distributor, a perforated pipe and a pipe fitting. The water distribution is responsible for the annular, and the perforation pipe straight tube is connected between the water-locator is responsible for, and perforation pipe interval 800 supplyes one's things with power 1200mm, singly supplyes one set of power 1200mm of every 800 supplyes power of power on the perforation pipe, two holes about a set of hole includes, haplopore aperture 2 mm. The horizontal spraying distance is about 200 and 300mm when single-hole water distribution is carried out. The water distributor B adopts a circulating perforated well for water distribution and mainly comprises a main pipe of the water distributor, a perforated pipe and a pipe fitting. The water distribution is responsible for the annular, and the perforation pipe is that the # -shaped connection is responsible for between the water-locator, and perforation pipe interval 400 supplyes one's things with material 600mm, singly supplyes one set of every 400 supplyes one's things with material 600mm on following the perforation pipe, and two holes about a set of hole includes, haplopore aperture 2 mm. The horizontal spraying distance is about 100 and 150mm when the water is distributed by a single hole.
The wetland graded aggregate consists of five layers, and the total thickness is 1400 mm. I. The II and III level particle material layers adopt ceramsite particles, and the IV and V level particle material layers adopt natural sand and stone. The I-level distribution particle layer adopts 20-25 mm-sized particles, has a heat conductivity coefficient of 0.1W/m.K and a thickness of about 150-200mm, and mainly plays a role in fixing plants and filtering suspended substances in sewage. The level II ingredient particle layer adopts 10-15mm of ceramsite, the heat conductivity coefficient is 0.12W/m.K, the thickness is about 200-. The III-level composition particle layer adopts ceramic particles with the particle size of 5-8mm, the heat conductivity coefficient is 0.15W/m.K, the thickness is about 200-250mm, the layer is suitable for the growth of denitrifying bacteria, the sewage can carry out denitrification when passing through the layer, and the total nitrogen in the sewage can be efficiently removed. The IV-level mixture layer is a mixed layer of medium sand and 06 melon seed slices, the thickness is about 200-250mm, the layer has a deep filtration effect and a denitrification effect the same as that of the III-level mixture layer, the sewage can be deeply filtered under the gap of the layer, and the filtered residues are decomposed under the anaerobic condition. The V-level particle material layer adopts 06 melon seed pieces, the thickness is 200-fold and 300mm, the layer is positioned at the bottommost layer of the wetland, the water collecting system is arranged in the layer, the layer is mainly used for supporting, and the upper particle material layer is prevented from blocking the water collecting layer.
The water collecting layer adopts pipeline slotting to collect water, the water collecting pipeline adopts DN100-DN150 UPVC pipe, the water collecting pipe is slotted, the sewage enters the water collecting layer through the slot and is collected and then discharged out of the wetland.
In a working state, domestic sewage is conveyed to the anti-freezing vertical subsurface flow wetland system through the collecting pipeline, the sewage firstly enters the pretreatment tank for pretreatment, and the pretreatment tank (made of FRP materials) mainly performs anaerobic hydrolysis and precipitation. The pretreatment tank is buried underground, and the inside of the pretreatment tank carries out exothermic anaerobic reaction, so that the water body in the tank cannot be frozen. The sewage sequentially passes through all the chambers of the pretreatment tank, the removal rate of SS in the sewage in the first chamber reaches more than 80%, the removal rate of COD is about 5%, the removal rate of SS in the sewage is accumulated to more than 85% after the sewage enters the second chamber through the elbow of the first chamber, the accumulated removal rate of COD is about 11%, the removal rate of SS in the sewage is accumulated to more than 90% after the sewage enters the third chamber through the elbow of the second chamber, the accumulated removal rate of COD is about 20%, and the removal rate of SS and the removal rate of COD are improved after the sewage enters the fourth chamber through the elbow of the third chamberAnd the fourth chamber is not obvious and mainly used as a water distribution chamber, and the sewage is lifted to the anti-freezing vertical subsurface flow wetland through the pump for deep purification. The sewage is lifted to the anti-freezing vertical subsurface flow wetland through the lifting pump, the water passes through a check valve before entering the anti-freezing vertical subsurface flow wetland, the check valve adopts a loose joint control to prevent the water from flowing backwards and impacting the lifting pump, and meanwhile, the pipeline maintenance is facilitated. The sewage enters the water distributor after passing through the check valve, if the temperature is higher than 0 ℃, the ball valve of the water distributor I is opened, the ball valve of the water distributor II is closed, the sewage enters the water distributor I, water is distributed through the perforated pipes in the water distributor, and the sewage is sprayed to the two sides of the perforated pipes; and if the temperature is below 0 ℃, opening a water distribution ball valve of the water distributor II, closing the water distributor ball valve of the water distributor I, and enabling the sewage to enter the water distributor II and distribute water through a perforated pipe in the water distributor. The water distributor I is arranged on the surface of the wetland, and the spraying range of water discharged from the perforated pipe is wide; the water distributor II is arranged below the surface of the wetland, and the number of perforated pipes is increased in the water distributor II in consideration of the blockage of water body injection so as to ensure the uniform water distribution. After passing through the water distributor, the sewage is arranged on the wetland graded aggregate and is allowed to permeate downwards under the action of gravity. The graded granules of the first layer and the second layer mainly play roles in heat preservation, plant fixation and filtration. The third layer of graded aggregate mainly provides a carrier for the growth of microorganisms, and pollutants in the sewage are explained and removed through the microorganisms on the carrier, so that COD and NH in the sewage are mainly removed3-N. The granule is joined in marriage to fourth level mainly is the facultative denitrification layer, and the tiny SS in the ability aquatic and carry out the denitrogenation effect can be got rid of to the biomembrane that this layer grows, because oxygen is difficult to get into and plant roots oxygen suppliment has thin in this layer of air, and this layer is fit for the growth of facultative microorganism, and facultative microorganism can carry out the denitrification to nitrate nitrogen in the sewage. The fifth layer of graded granules mainly serves as a bearing drainage layer and collects the treated sewage. And the sewage is purified in the wetland graded aggregate and then is collected into a water collector, and the water collector collects the sewage and then discharges the sewage out of the anti-freezing vertical subsurface flow wetland.
If the water distributor A is opened and the water distributor B is closed, the cold-proof type vertical subsurface flow wetland with the floor area 4 times of the daily treatment scale of the wetland is operated to purify sewage, the treated inlet water quality is domestic sewage with the COD of 250mg/L, the ammonia nitrogen of 25mg/L and the total nitrogen of 35mg/L, and the removal rates of the COD, the ammonia nitrogen and the total nitrogen can respectively reach 90%, 80% and 60%. The effluent water can reach the first class A standard in the discharge Standard of pollutants for municipal wastewater treatment plants. If the water distributor II is opened and the water distributor I is closed due to low temperature, the cold-proof type vertical subsurface flow wetland with the floor area 4 times of the daily treatment scale of the wetland is operated and purified, the removal rates of COD, ammonia nitrogen and total nitrogen can respectively reach 80%, 70% and 55% when the treated inlet water is domestic sewage with the COD of 250mg/L, the ammonia nitrogen of 25mg/L and the total nitrogen of 35 mg/L. The whole wetland effect is stable, and the water treatment effect is better. The effluent water can reach the first class B standard in the discharge Standard of pollutants for municipal wastewater treatment plants.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the pulse double water distribution layers are adopted, so that the problem that the wetland is not practical due to the fact that water distribution at a lower temperature is frozen on the surface of the wetland or in a pipeline in winter is avoided. The pulse water distribution can avoid the phenomenon that the surface layer of the wetland is frozen at low temperature due to long-time water supply caused by continuous water supply. The pulse water distribution can prevent the wetland from continuously feeding water all the time, and the pulse water distribution divides the sewage into a plurality of times to be pumped into the wetland, so that the surface layer and the shallow layer of the wetland can not have water for a long time.
(2) The pulse double water distribution layer can realize water distribution 40-70cm below the surface layer of the wetland when the temperature is low, and not only can distribute water below a frozen soil layer in most areas, but also can avoid internal freezing caused by water collection in the wetland. When the temperature is not low, water is distributed on the upper layer of the pulse double water distribution layer, so that the wetland space is fully utilized; the lower layer of the pulse double water distribution layer is adopted for water distribution at lower temperature,
(3) the wetland graded aggregate has double functions of purification, heat preservation and freeze prevention, and the reasonable combination not only ensures the effluent quality, but also saves the cost. The upper 3 layers of granules adopt ceramsite with poor thermal conductivity, heat preservation and water purification are both considered, the lower 2 layers of granules mainly take the water purification effect, and graded sand stone with better purification effect and low cost is adopted.
(4) The pretreatment tank and the anti-freezing vertical subsurface flow wetland realize heat preservation and cold resistance from structural materials. The pretreatment tank is made of FRP material with poor heat conductivity, high strength and strong corrosion resistance, the structure form is buried, and the minimum water inlet elevation equipment is 1.2m below the ground; the anti-freezing vertical subsurface flow wetland is built by aerated light building blocks, the wetland retaining wall and the bottom cushion layer are all made of aerated light building blocks, and the anti-freezing vertical subsurface flow wetland is fully buried.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the structure of the water distributor A of the present invention;
fig. 3 is a schematic view of the structure of the water distributor B of the present invention.
In the figure: 1. a pretreatment tank body; 11. a 90-degree elbow; 12. a first chamber; 13. a second chamber; 14. a third chamber; 15. A fourth chamber; 16. an access hole; 17. a submersible sewage pump; 18. an FRP sleeve; 2. a vertical undercurrent artificial wetland body; 21. retaining walls in the wet land; 22. a V-level grading particle layer; 23. a grade IV ingredient particle layer; 24. a III-grade ingredient particle layer; 25. a II-grade ingredient particle layer; 26. a I-grade ingredient particle layer; 27. a water collector; 28. b, a water distributor; 281. b, a main pipe of the water distributor; 282. a B perforated tube 282; 283. c, perforating a pipe; 29. a water distributor; 291. a water distributor main pipe; 292. a, perforating a pipe; 210. a plant; 30. A check valve; 31. a ball valve of the water distributor.
Detailed Description
Referring to fig. 1 to 3, the vertical subsurface flow constructed wetland suitable for the low temperature condition comprises a vertical subsurface flow constructed wetland body 2 and a pretreatment tank body 1 made of an FRP material buried underground; the pretreatment pool body 1 comprises a first bin 12, a second bin 13, a third bin 14 and a fourth bin 15 which are sequentially communicated through a 90-degree elbow 11; a water inlet pipeline is arranged at the upper part of the first chamber 12; the water inlet of the 90-degree elbow 11 faces the bottom surface of the inner cavity of the upper-stage bin, and the water outlet of the 90-degree elbow 11 is communicated with the inner cavity of the lower-stage bin; a submersible sewage pump 17 is arranged in the fourth bin 15; a V-grade particle material layer 22, an IV-grade particle material layer 23, a III-grade particle material layer 24, a II-grade particle material layer 25 and an I-grade particle material layer 26 are sequentially arranged in the vertical subsurface flow constructed wetland body 2 from bottom to top; a water collector 27 is arranged in the V-level particle material layer 22; a B water distributor 28 is paved on the middle lower part of the II-level particle material layer 25, and an A water distributor 29 is paved on the surface of the I-level particle material layer 26; plants 210 are arranged on the surface of the I-grade ingredient particle layer 26; the submersible sewage pump 17 is communicated with the water distributor A29 and the water distributor B28 through pipelines.
Wherein the first chamber 12 accounts for 35% of the volume of the pretreatment tank body 1; the second bin 13 accounts for 25% of the volume of the pretreatment tank body 1; the third bin 14 accounts for 25% of the volume of the pretreatment tank body 1; the fourth bin 15 accounts for 15% of the volume of the pretreatment tank body 1.
The distance between the center of the water outlet of the 90-degree elbow 11 connecting the first secondary chamber 12 and the second chamber 13 and the bottom surface of the inner cavity of the first chamber 12 is 800-1000 mm; the distance between the center of the water outlet of the 90-degree elbow 11 connecting the second chamber 13 and the third chamber 14 and the bottom surface of the inner cavity of the second chamber 13 is 800-1000 mm; the center of the water outlet of the 90-degree elbow 11 connecting the third chamber 14 and the fourth chamber 15 is 1000-1500mm away from the bottom surface of the inner cavity of the third chamber 14.
The tops of the first bin 12, the second bin 13, the third bin 14 and the fourth bin 15 are provided with access holes 16; the diameters of the access holes 16 at the tops of the first chamber 12 and the second chamber 13 are 500-600 mm; the diameters of the access holes 16 at the tops of the third chamber 14 and the fourth chamber 15 are 600mm and 800 mm; the access hole 16 is connected with the bin through an FRP sleeve 18; the pipeline of the submersible sewage pump 17 communicated with the water distributor A29 and the water distributor B28 passes through the FRP sleeve 18 at the top of the fourth chamber 15; and a check valve 30 and a water distributor ball valve 31 are arranged on a pipeline of the submersible sewage pump 17 communicated with the A water distributor 29 and the B water distributor 28.
The granules of the I-grade distribution granule layer 26 adopt 20-25mm granules, and the heat conductivity coefficient is 0.1W/m.K; the granules of the II-grade distribution granule layer 25 adopt ceramsite with the grain diameter of 10-15mm and the heat conductivity coefficient of 0.12W/m.K; the granules of the III-grade distribution granule layer 24 adopt granules with the grain diameter of 5-8mm, and the heat conductivity coefficient is 0.15W/m.K; the granules of the IV-level compound granule layer 23 adopt sandstone and melon seed slices; the granules of the V-level compound granule layer 22 adopt sand and/or melon seed slices.
The thickness of the I-level grading particle layer 26 is 150-200 mm; the thickness of the II-level grading particle layer 25 is 200-350 mm; the thickness of the III-level grading particle layer 24 is about 200mm and 250 mm; the thickness of the IV-level grading particle layer 23 is 200-250 mm; the thickness of the V-level grading particle layer 22 is 200-300 mm; the total thickness of the V-level, IV-level, III-level, II-level and I-level particle material layers 22, 23, 24, 25 and 26 is 1350-1450 mm.
The plant 210 is Siberian Iris and Iris pseudacorus.
The A water distributor 29 comprises an A water distributor main pipe 291 which is circularly arranged in the vertical subsurface flow constructed wetland body 2 and a plurality of rows of A perforated pipes 292 which are arranged in parallel and communicated with the A water distributor main pipe 291; the rows of the A perforated pipes 292 are parallel to the direction of the water flow entering the vertical subsurface flow constructed wetland; the B water distributor 28 comprises a main B water distributor pipe 281, a plurality of rows of B perforated pipes 282 and a plurality of columns of C perforated pipes 283, wherein the main B water distributor pipe 281 is annularly arranged in the vertical subsurface flow constructed wetland body 2, the rows of B perforated pipes are arranged in parallel and are communicated with the main B water distributor pipe 281, and the columns of C perforated pipes 283 are arranged in parallel and penetrate through the main B perforated pipes 282 and are simultaneously communicated with the main B water distributor pipe 282 and the main B water distributor pipe 281; the rows of the perforated pipes 281 are parallel to the direction of the water flow entering the vertical subsurface flow constructed wetland.
The distance between the two adjacent A perforated pipes 291 is 800-1200mm, a group of openings is arranged on the A perforated pipes 291 every 800-1200mm, each group of openings comprises a left opening and a right opening, and the opening diameter is 2 +/-0.05 mm; the distance between the two adjacent B perforated pipes 282 is 400-600mm, a group of openings are arranged on the B perforated pipes 282 at intervals of 400-600mm, each group of openings comprises a left opening and a right opening, and the opening diameter is 2 +/-0.05 mm; the distance between the two adjacent C perforated pipes 283 is 400-600mm, a group of openings are arranged on the C perforated pipes 283 every 400-600mm, each group of openings comprises a left opening and a right opening, and the opening diameter is 2 +/-0.05 mm.
The vertical subsurface flow constructed wetland body 2 further comprises a wetland retaining wall 21.
Claims (10)
1. The vertical subsurface flow constructed wetland suitable for the condition of lower temperature is characterized by comprising a vertical subsurface flow constructed wetland body (2) and a pretreatment tank body (1) which is buried underground and made of FRP materials; the pretreatment pool body (1) comprises a first bin (12), a second bin (13), a third bin (14) and a fourth bin (15) which are sequentially communicated through a 90-degree elbow (11); a water inlet pipeline is arranged at the upper part of the first chamber (12); the water inlet of the 90-degree elbow (11) faces the bottom surface of the inner cavity of the upper-stage bin, and the water outlet of the 90-degree elbow (11) is communicated with the inner cavity of the lower-stage bin; a submersible sewage pump (17) is arranged in the fourth bin (15); a V-grade distribution particle layer (22), an IV-grade distribution particle layer (23), a III-grade distribution particle layer (24), a II-grade distribution particle layer (25) and an I-grade distribution particle layer (26) are sequentially arranged in the vertical subsurface flow constructed wetland body (2) from bottom to top; a water collector (27) is arranged in the V-grade ingredient material layer (22); a water distributor B (28) is paved at the middle lower part of the II-level particle material layer (25), and a water distributor A (29) is paved on the surface of the I-level particle material layer (26); plants (210) are arranged on the surface of the I-grade ingredient particle layer (26); the submersible sewage pump (17) is communicated with the water distributor A (29) and the water distributor B (28) through pipelines.
2. The vertical subsurface flow constructed wetland according to claim 1, characterized in that the first chamber (12) occupies 35% of the volume of the pretreatment tank body (1); the second bin (13) accounts for 25% of the volume of the pretreatment tank body (1); the third bin (14) accounts for 25% of the volume of the pretreatment tank body (1); the fourth bin (15) accounts for 15% of the volume of the pretreatment tank body (1).
3. The vertical subsurface flow constructed wetland according to claim 1, characterized in that the center of the water outlet of the 90-degree elbow (11) connecting the first chamber (12) and the second chamber (13) is 800mm and 1000mm away from the bottom surface of the inner cavity of the first chamber (12); the distance between the center of the water outlet of the 90-degree elbow (11) connecting the second chamber (13) and the third chamber (14) and the bottom surface of the inner cavity of the second chamber (13) is 800-1000 mm; the center of the water outlet of the 90-degree elbow (11) connecting the third chamber (14) and the fourth chamber (15) is 1000-1500mm away from the bottom surface of the inner cavity of the third chamber (14).
4. The vertical subsurface flow constructed wetland according to claim 1, characterized in that the tops of the first chamber (12), the second chamber (13), the third chamber (14) and the fourth chamber (15) are provided with manholes (16); the diameters of the access holes (16) at the tops of the first chamber (12) and the second chamber (13) are 500-600 mm; the diameters of the access holes (16) at the tops of the third chamber (14) and the fourth chamber (15) are 600-800 mm; the access hole (16) is connected with the bin through an FRP sleeve (18); a pipeline of the submersible sewage pump (17), the A water distributor (29) and the B water distributor (28) penetrates through the FRP sleeve (18) at the top of the fourth chamber (15); and a check valve (30) and a water distributor ball valve (31) are arranged on a pipeline communicated with the A water distributor (29) and the B water distributor (28) of the submersible sewage pump (17).
5. The vertical subsurface flow constructed wetland according to claim 1, wherein the I-level distribution particle layer (26) is made of particles with a particle size of 20-25mm, and has a thermal conductivity of 0.1W/m-K; the granules of the II-grade distribution granule layer (25) adopt ceramsite with the grain diameter of 10-15mm, and the heat conductivity coefficient is 0.12W/m.K; the granules of the III-grade distribution granule layer (24) adopt ceramic granules with the grain diameter of 5-8mm, and the heat conductivity coefficient is 0.15W/m.K; the aggregate of the IV-level ingredient aggregate layer (23) adopts sandstone and melon seed slices; the granules of the V-grade compound granule layer (22) adopt sand and/or melon seed slices.
6. The vertical subsurface flow constructed wetland according to claim 5, wherein the thickness of the I-level distribution particle layer (26) is 150-200 mm; the thickness of the II-grade distribution particle layer (25) is 200-350 mm; the thickness of the III-level grading particle layer (24) is 200-250 mm; the thickness of the IV-level grading particle layer (23) is 200-250 mm; the thickness of the V-level grading particle layer (22) is 200-300 mm; the total thickness of the V-level grading particle layer (22), the IV-level grading particle layer (23), the III-level grading particle layer (24), the II-level grading particle layer (25) and the I-level grading particle layer (26) is 1350-.
7. The vertical subsurface constructed wetland of claim 1 wherein the plants (210) are Siberian iris and Acorus calamus.
8. The vertical subsurface flow constructed wetland according to claim 1, characterized in that the A water distributor (29) comprises an A water distributor main pipe (291) arranged in the vertical subsurface flow constructed wetland body (2) in a circular manner and a plurality of rows of A perforated pipes (292) arranged in parallel and communicated with the A water distributor main pipe (291); the rows of the perforated pipes (292) are parallel to the direction of the water flow entering the vertical subsurface flow constructed wetland; the water distributor B (28) comprises a main water distributor B pipe (281) circularly arranged in the vertical subsurface flow constructed wetland body (2), a plurality of rows of perforated pipes B (282) which are arranged in parallel and communicated with the main water distributor B pipe (281), and a plurality of columns of perforated pipes C (283) which are arranged in parallel, penetrate through the perforated pipes B (282) and are simultaneously communicated with the perforated pipes B (282) and the main water distributor B pipe (281); and the rows of the perforated pipes (282) are parallel to the direction of the water flow entering the vertical subsurface flow constructed wetland.
9. The vertical subsurface flow constructed wetland according to claim 8, wherein the distance between two adjacent A perforated pipes (292) is 800-; the distance between two adjacent B perforated pipes (282) is 400-600mm, a group of openings are arranged on the B perforated pipes (282) at intervals of 400-600mm, each group of openings comprises a left opening and a right opening, and the opening diameter is 2 +/-0.05 mm; the distance between the two adjacent C perforated pipes (283) is 400-600mm, a group of openings is arranged on the C perforated pipes (283) every 400-600mm, each group of openings comprises a left opening and a right opening, and the opening diameter is 2 +/-0.05 mm.
10. The vertical subsurface flow constructed wetland according to claim 1, characterized in that the vertical subsurface flow constructed wetland body (2) further comprises a wetland retaining wall (21).
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Effective date of registration: 20231012 Address after: Room 1201-1232, Building 1 and 2, Phase 2, Yingxiangyuan, No. 220 Fuyuan West Road, Liuyanghe Street, Kaifu District, Changsha City, Hunan Province, 410000 Patentee after: Hunan haiweiyuan Environmental Protection Technology Co.,Ltd. Address before: 410199 201, building 2, District 6, shanxianling community, Xingsha street, Changsha County, Changsha City, Hunan Province Patentee before: Hunan Luze huanchuang Environmental Engineering Co.,Ltd. |