CN221741108U - Tidal current constructed wetland system suitable for northern cold regions - Google Patents
Tidal current constructed wetland system suitable for northern cold regions Download PDFInfo
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- CN221741108U CN221741108U CN202322918744.9U CN202322918744U CN221741108U CN 221741108 U CN221741108 U CN 221741108U CN 202322918744 U CN202322918744 U CN 202322918744U CN 221741108 U CN221741108 U CN 221741108U
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Abstract
The utility model relates to a tidal flow constructed wetland system suitable for northern cold areas, which comprises an impermeable layer at the bottom, a multi-layer filler layer positioned above the impermeable layer, water retaining walls positioned at the periphery of the tidal flow constructed wetland system, a first water inlet pipe, a second water inlet pipe and a water purifying channel, wherein a water storage channel is arranged between the multi-layer filler layer and the water retaining walls, a water permeable wall is arranged at the edge of one side of the water storage channel positioned on the multi-layer filler layer, the first water inlet pipe is arranged above the multi-layer filler layer or buried in the multi-layer filler layer, the second water inlet pipe is buried in the multi-layer filler layer, the water purifying channel is arranged on the impermeable layer, the water purifying channel is used for leading out purified sewage, and the water storage channel is used for storing sewage which is not discharged by the water purifying channel. The tidal flow artificial wetland system suitable for the northern cold regions fully utilizes the sewage treatment capacity of the tidal flow artificial wetland, and greatly improves the sewage treatment efficiency of the tidal flow artificial wetland.
Description
Technical Field
The utility model relates to the technical field of artificial wetlands, in particular to a tidal flow artificial wetland system suitable for northern cold areas.
Background
Along with the acceleration of the comprehensive treatment process of the ecological environment in China, the artificial wetland technology is one of the most effective low-carbon and environment-friendly technologies, and the application of the artificial wetland technology is greatly developed from the general application in the southern area and the gradual application in the northern area of China. The artificial wetland is a natural ecological simulation comprehensive ecological chain circulation purification system, and comprises a wetland bed, wetland plants, wetland animals, wetland microorganisms, and the matter circulation biochemical principle that various species are symbiotic, co-melted, mutually restrained and balanced to develop in the comprehensive ecological system such as sunlight, rain dew and organic matters, so that organic pollutants are purified, the ecological environment is repaired, and the good ecological environment balance is always kept.
The tidal flow constructed wetland is characterized in that the water inlet and the water outlet of the system are controlled to alternately circulate in a submerged/empty mode, so that the interior of the wetland is continuously changed in an aerobic environment and an anoxic environment, the tidal flow constructed wetland is suitable for the adsorption and denitrification reactions of organic matters and nitrogen and phosphorus pollutants mainly occurring in the submerged period of the tidal flow constructed wetland system in northern cold areas, and microorganisms utilize oxygen to perform the oxidation removal of the organic matters and the nitrification reaction of ammonia nitrogen in the empty period, so that the removal of the pollutants is realized. Compared with the traditional constructed wetland, the tidal flow constructed wetland has the most remarkable characteristics of higher oxygen transmission quantity and oxygen utilization rate, so that pollutants can be removed more efficiently. And the intermittent water inlet mode can accelerate the decomposition of pollutants in the idle period, so that the risk of wetland blockage is reduced. The flooding and idle time distribution in one period of the tidal flow constructed wetland is an important control parameter, and the longer idle time can enable the wetland to fully reoxygenate, so that good nitrification and organic matter removal effects are obtained.
However, the conventional tidal flow constructed wetland technology has the disadvantages that when it is used in northern areas, particularly in northeast areas where the temperature is extremely low in winter, the multi-layer packing layer for filtration and permeation has a frozen soil layer, when it is used in winter, the water inlet pipe for inputting sewage needs to be buried below the frozen soil layer, and when it is used in summer, the filtration and purification capacity of a part of the upper part of the multi-layer packing for filtration and permeation and the absorption capacity of the green plants planted on the upper part of the multi-layer packing for pollutants are not fully utilized, thus reducing the sewage purification efficiency of the tidal flow constructed wetland, and when the amount of sewage is large, the tidal flow constructed wetland cannot treat excessive sewage, and when the amount of sewage is small, the sewage treatment capacity of the tidal flow constructed wetland is not fully utilized, and the sewage treatment efficiency of the tidal flow constructed wetland is also reduced. Therefore, a new system is desired by the technicians working on the design and construction of the constructed wetland, and the problems can be improved and solved.
Disclosure of utility model
In view of the above, there is provided a tidal flow constructed wetland system suitable for northern cold regions, which is provided with a first water inlet pipe for summer use arranged above or buried in a shallower position above a multi-layer filler layer and a second water inlet pipe for winter buried in a deeper position of the multi-layer filler layer, and a water storage ditch for accommodating sewage which is not treated by the tidal flow constructed wetland when the sewage amount is large, so that the sewage treatment efficiency of the tidal flow constructed wetland is greatly improved, and the performance superiority of the system is reflected.
The tidal flow artificial wetland system suitable for the northern cold regions comprises an impermeable layer positioned at the bottom, a multi-layer packing layer positioned above the impermeable layer, water retaining walls positioned at the periphery of the tidal flow artificial wetland system suitable for the northern cold regions, a first water inlet pipe, a second water inlet pipe and at least one water purifying channel.
Specifically, be equipped with a water storage ditch at least between the multilayer packing layer with the retaining wall, the water storage ditch is located multilayer packing layer one side edge is equipped with the wall that permeates water, first inlet tube is located multilayer packing layer top or bury in multilayer packing layer, the second inlet tube bury in multilayer packing layer, first inlet tube with the second inlet tube has a plurality of apopores respectively, through each apopore discharge pipe in sewage and through the filtration of multilayer packing layer is absorbed and decomposed the back and is permeated downwards, every the water purification canal is located on the barrier layer, every water purification canal mostly bury in the multilayer packing layer.
Specifically, each water purifying channel is used for leading out purified sewage, and the water storage channel is used for storing the sewage which is not discharged by the water purifying channels.
In some preferred embodiments, the top of the multi-layer packing layer is planted with a green plant for absorbing, decomposing and purifying contaminants in the wastewater.
In some embodiments, the barrier layer is compacted bottom soil.
Preferably, the multi-layer packing layer comprises three layers, wherein the upper packing layer is one or more of volcanic rock, zeolite, iron slag, rare earth tailings, hydrotalcite or pyrite, the grain size is 8-15mm, the middle packing layer is crushed stone with the grain size of 16-32mm, and the lower packing layer is crushed stone with the grain size of 32-50 mm.
Specifically, the thickness of the upper filler layer accounts for more than 50% of the thickness of the multi-layer filler layer.
In some specific embodiments, the permeable wall is formed by stacking metal woven cages filled with permeable stones, the permeable stones are one or more of volcanic rock or zeolite or iron slag or rare earth tailings or hydrotalcite or pyrite, the particle size is 50-80mm, the width of the permeable wall is 0.5-2.5m, and the top height of the permeable wall is basically consistent with the top height of the multilayer packing layer.
Further, the water purifying channel is buried in the multi-layer packing layer part and is also covered with a layer of gravel pile with the particle size of 50-80mm, the gravel pile is one or more of volcanic rock, zeolite, iron slag, rare earth tailings, hydrotalcite or pyrite, the gravel pile is covered with a layer of isolating cloth, the isolating cloth is used for isolating the gravel pile from the multi-layer packing layer, the top of the gravel pile is basically level with the bottom of the upper packing layer, the water purifying channel comprises a water channel body and a water channel cover, the water channel body is a pipeline with an opening at the upper part and is used for containing and leading out purified sewage, the water channel cover is provided with a plurality of holes and is arranged at the upper part of the water channel body, and the water channel cover is used for enabling the purified sewage to flow into the water purifying channel and isolating the water purifying channel from the gravel pile.
Specifically, the bottom of the water storage ditch is covered with a layer of broken stone, the broken stone is used for compacting and protecting the bottom of the water storage ditch, the upper part of the water storage ditch is provided with a movable anti-freezing cover plate, and the anti-freezing cover plate is used for preventing water in the water storage ditch from freezing in winter.
Specifically, the tidal flow constructed wetland system suitable for northern cold regions is also provided with water outlet wells, each water purifying channel is respectively communicated with the water outlet wells, and the water outlet wells are used for accommodating purified drainage led out by the water purifying channels.
In some embodiments, the first inlet pipe is for summer sewage introduction and the second inlet pipe is for winter sewage introduction.
The tidal flow constructed wetland system suitable for the northern cold region is provided with the first water inlet pipe which is arranged above the multilayer packing layer or buried in a shallower position above the multilayer packing layer during summer use, the filtering and purifying functions of the upper part of the multilayer packing layer and the pollutant absorbing capacity of green plants planted on the upper part of the multilayer packing layer are fully utilized during summer use, and the second water inlet pipe which is buried in a deeper position of the multilayer packing layer during winter use, so that the tidal flow constructed wetland system suitable for the northern cold region can normally operate in winter, the sewage treating capacity of the tidal flow constructed wetland can be fully utilized, in addition, the tidal flow constructed wetland system suitable for the northern cold region is further provided with the water storage ditch for accommodating sewage which is not treated by the tidal flow constructed wetland when the sewage amount is large, a part of sewage flows into the water storage ditch through the permeable wall to be stored, and when the sewage amount is small, the sewage stored in the tidal flow constructed wetland is discharged by the tidal flow constructed wetland, so that the tidal flow constructed wetland can further fully utilize the sewage treating capacity of the tidal flow constructed wetland, and the tidal flow constructed wetland has a wide application prospect.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model. It is evident that the figures in the following description are only some embodiments of the utility model, from which other figures can be obtained without inventive effort for a person skilled in the art. In the drawings:
Fig. 1 is a schematic cross-sectional view of a tidal flow constructed wetland system suitable for northern cold regions according to an embodiment of the present utility model.
Fig. 2 is a schematic diagram showing a cross-sectional view of a tidal flow constructed wetland system suitable for northern cold regions according to an embodiment of the present utility model.
Fig. 3 is a cross-sectional view of a water purifying channel structure of a tidal flow constructed wetland system suitable for northern cold regions, which is provided by the embodiment of the utility model.
Fig. 4 is a schematic view of a water retaining wall structure of a tidal flow constructed wetland system suitable for northern cold regions according to an embodiment of the utility model.
Wherein:
101. An impermeable layer; 130. bottom soil; 201. a multi-layer filler layer; 220. an upper filler layer; 252. a middle filler layer;
272. A lower filler layer; 301. a water retaining wall; 350. a water permeable wall; 360. a permeable stone; 370. a metal braiding cage;
401. A first water inlet pipe; 430. a second water inlet pipe; 450. a water outlet hole; 501. a water purifying canal; 532. a pile of crushed stone;
540. A spacer cloth; 550. a canal body; 560. a water canal cover; 601. a water storage trench; 620. an anti-freezing cover plate;
637. A layer of crushed stone; 701. green planting; 710. and (5) a water outlet well.
Detailed Description
The present utility model will be described in detail with reference to specific embodiments and drawings.
Referring to fig. 1 to 4, there is shown a tidal flow constructed wetland system suitable for northern cold regions, which includes a barrier layer 101 positioned at the bottom, a multi-layer filler layer 201 positioned above the barrier layer 101, water blocking walls 301 positioned at the peripheral edges of the tidal flow constructed wetland system suitable for northern cold regions, a first water inlet pipe 401, a second water inlet pipe 430 and at least one water purifying channel 501. In this embodiment, the number of the water purifying channels 501 is two, and the two water purifying channels 501 are respectively positioned at the middle left and the middle right of the constructed wetland system, so that the sewage purified by the multi-layer filler layer 201 can be more efficiently stored and discharged. The water retaining walls 301 at the peripheral edges of the system are connected to form a closed loop seal for preventing the sewage from diffusing out of the tidal flow constructed wetland system suitable for northern cold areas.
Specifically, at least one water storage ditch 601 is disposed between the multilayer packing layer 201 and the water retaining wall 301, the water storage ditch 601 is disposed at an edge of one side of the multilayer packing layer 201 and is provided with a water permeable wall 350, the first water inlet pipe 401 is disposed above the multilayer packing layer 201 or embedded in the multilayer packing layer 201, the second water inlet pipe 430 is embedded in the multilayer packing layer 201, the first water inlet pipe 401 and the second water inlet pipe 430 respectively have a plurality of water outlet holes 450, and sewage in the pipes is discharged through the water outlet holes 450 and filtered, absorbed and decomposed by the multilayer packing layer 201 and then permeates downwards, each water purifying ditch 501 is disposed on the impermeable layer 101, and each water purifying ditch 501 is mostly embedded in the multilayer packing layer 201. In this embodiment, the water storage trench 601 is provided as one water storage trench, the water permeable wall 350 may enable the sewage in the multi-layer filler layer 201 and the water storage trench 601 to permeate and circulate, the first water inlet pipe 401 is disposed above the multi-layer filler layer 201, the second water inlet pipe 430 is buried in the multi-layer filler layer, the buried position of the second water inlet pipe 430 is located at the position of the winter frozen soil layer of the tidal flow constructed wetland system suitable for northern cold areas, so as to ensure that the sewage in the second water inlet pipe 430 is not frozen in winter, and the plurality of water outlet holes 450 are uniformly distributed on the first water inlet pipe 401 and the second water inlet pipe 430, respectively, with a spacing of substantially 3000mm.
Specifically, each water purifying channel 501 is used for leading out purified sewage, and the water storing channel 601 is used for storing sewage which is not discharged by the water purifying channel 501. Specifically, when the amount of sewage is large, a part of sewage flows into the water storage trench 601 through the water permeable wall 350 to be stored, and when the amount of sewage is small, the sewage stored in the water storage trench 601 is purified by the tidal flow artificial wetland and discharged through the water purification trench 501, so that the sewage treatment capacity of the tidal flow artificial wetland can be fully utilized.
In some preferred embodiments, a green plant 701 is planted on top of the multi-layer packing layer 201, and the green plant 701 is used for absorbing and decomposing pollutants in the purified sewage. Specifically, the green land plants, the wetland animals and the wetland microorganisms absorb, decompose and purify pollutants in the sewage in the comprehensive ecological system, and the symbiotic, co-melted and mutually restrained and balanced substance circulation biochemical principles of various species are adopted, so that the pollutants in the sewage can be purified. Specifically, the green plants can be one or more cold-resistant plants, such as radix Ophiopogonis, herba Oenanthes Javanicae, herba Alii Fistulosi, rhizoma Acori Graminei, etc.
In some embodiments, the impermeable layer 101 is compacted bottom soil 130, which in this example is desired to be plain soil, and sludge, household garbage, frozen soil, humus soil, and saline soil are not used to ensure the water-impermeable capacity of the impermeable layer.
Preferably, the multi-layer packing layer 201 comprises three layers, the upper layer packing layer 220 is one or more of volcanic rock or zeolite or iron slag or rare earth tailings or hydrotalcite or pyrite, the particle size is 8-15mm, the middle layer packing layer 252 is crushed stone with the particle size of 16-32mm, and the lower layer packing layer 272 is crushed stone with the particle size of 32-50 mm. In this embodiment, the upper filler layer 220 is made of volcanic rock as a lightweight filter material, and the middle and lower filler layers are made of various crushed stones obtained locally.
Specifically, the thickness of the upper filler layer 220 is greater than 50% of the thickness of the multi-layer filler layer 201. In this embodiment, the thickness of the upper filler layer 201 is 1100mm, the total thickness of the multiple filler layers is 1500mm, and the thickness of the upper filler layer 220 is ensured to be greater than 50% of the thickness of the multiple filler layers 201, which is to ensure the purification efficiency and quality of the sewage applicable to the tidal flow constructed wetland system in northern cold regions.
In some embodiments, the permeable wall 350 is formed by stacking metal woven cages 370 filled with permeable stones 360, the permeable stones 360 are one or more of volcanic rock, zeolite, iron ore slag, rare earth tailings, hydrotalcite, or pyrite, the particle size is 50-80mm, the width of the permeable wall 350 is 0.5-2.5m, and the top height of the permeable wall 350 is basically consistent with the top height of the multi-layer filler layer 201. In this embodiment, the width of the water permeable wall 350 is 1000mm, the water permeable stone 360 is made of light filter material volcanic rock, and the metal woven cage 370 is made of high-galvanized low-carbon steel wires by welding and weaving, so that the strength and the water permeability of the water permeable wall 350 are ensured.
Further, the water purifying channel 501 is buried in the multi-layer packing layer 201 and is further covered with a crushed stone pile 532 with the particle size of 50-80mm, the crushed stone pile 532 is one or more of volcanic rock, zeolite, iron slag, rare earth tailings, hydrotalcite or pyrite, the crushed stone pile 532 is covered with an isolating cloth 540, the isolating cloth 540 is used for isolating the crushed stone pile 532 from the multi-layer packing layer 201, the top of the crushed stone pile 532 is basically level with the bottom of the upper packing layer 220, the water purifying channel 501 comprises a channel body 550 and a channel cover 560, the channel body 550 is a pipeline with an opening at the upper part and is used for containing and leading out purified sewage, the channel cover 560 is provided with a plurality of holes and is arranged at the upper part of the channel body 550, and the channel cover 560 is used for enabling the purified sewage to flow into the water purifying channel 501 and isolating the water purifying channel 501 from the crushed stone pile 532. In this embodiment, 600 g/square meter geotechnical cloth is used as the isolating cloth 540 to ensure the strength and the filtering permeability of the isolating cloth 540, light filter material volcanic rock is used as the gravel pile 532, and the canal body 550 and the canal cover 560 are in reinforced concrete structures to ensure the structural strength and the reliability of the water purifying canal 501.
Specifically, the bottom of the water storage ditch 601 is covered with a layer of broken stone 637, the broken stone is used for compacting and protecting the bottom of the water storage ditch 601, the upper portion of the water storage ditch is provided with a movable anti-freezing cover plate 620, and the anti-freezing cover plate 620 is used for preventing water in the water storage ditch from freezing in winter. The particle size of the broken stone used in this embodiment is 50-80mm, which is used for compacting the bottom of the water storage trench 601 to prevent the water seepage performance of the bottom of the water storage trench 601 from decreasing, the anti-freezing cover plate 620 is made of a reinforced concrete slab structure covered with a heat-insulating layer, and the heat-insulating layer can be made of heat-insulating materials such as rock wool boards, phenolic aldehyde foams, and the like.
Specifically, the tidal flow constructed wetland system suitable for northern cold regions is further provided with water outlet wells 710, each water purifying channel 501 is respectively communicated with the water outlet wells 710, and the water outlet wells 710 are used for accommodating purified drainage led out from the water purifying channels 501. In this embodiment, the water outlet well 710 is disposed at the edge of the tidal current artificial wetland system suitable for the northern cold region and is located outside the water retaining wall, so that the purified sewage in the tidal current artificial wetland system suitable for the northern cold region can be conveniently led out from the water outlet well 710.
In some embodiments, the first inlet pipe 401 is used to introduce sewage in summer and the second inlet pipe 430 is used to introduce sewage in winter. Specifically, the first water inlet pipe 401 is higher than the second water inlet pipe 430 in the setting position of the tidal current constructed wetland system suitable for northern cold regions, and the second water inlet pipe 430 is under the frozen soil layer of the multilayer filler layer 201 in winter, so that the tidal current constructed wetland system suitable for northern cold regions can also normally operate in winter, and the first water inlet pipe 401 arranged above the multilayer filler layer 201 or buried in the surface layer of the multilayer filler layer is used in summer, so that the filtering and purifying functions of the upper parts of the multilayer fillers and the pollutant absorbing capacity of green plants planted on the upper parts of the multilayer fillers are fully utilized, and thus, the sewage treatment efficiency of the tidal current constructed wetland system suitable for northern cold regions is improved.
It should be noted that the present utility model is not limited to the above embodiments, and those skilled in the art can make other changes according to the inventive spirit of the present utility model, and these changes according to the inventive spirit of the present utility model should be included in the scope of the present utility model as claimed.
Claims (10)
1. The tidal flow artificial wetland system suitable for the northern cold region is characterized by comprising an impermeable layer positioned at the bottom, a multi-layer packing layer positioned above the impermeable layer, water retaining walls positioned at the peripheral edges of the tidal flow artificial wetland system suitable for the northern cold region, a first water inlet pipe, a second water inlet pipe and at least one water purifying channel;
At least one water storage ditch is arranged between the multilayer packing layer and the water retaining wall, the water storage ditch is positioned at one side edge of the multilayer packing layer and is provided with a water permeable wall, the first water inlet pipe is arranged above the multilayer packing layer or buried in the multilayer packing layer, the second water inlet pipe is buried in the multilayer packing layer, the first water inlet pipe and the second water inlet pipe are respectively provided with a plurality of water outlets, sewage in the pipes passes through the water outlets and is filtered, absorbed and decomposed by the multilayer packing layer and then permeates downwards, each water purifying ditch is arranged on the impermeable layer, and most of each water purifying ditch is buried in the multilayer packing layer;
each water purifying channel is used for leading out purified sewage, and the water storage channel is used for storing sewage which is not discharged by the water purifying channels.
2. The tidal flow constructed wetland system for northern cold regions as claimed in claim 1, wherein said multi-layer filler layer is planted with a green plant on top thereof, said green plant being used for absorbing and decomposing pollutants in purified sewage.
3. The tidal flow constructed wetland system for northern cold regions as defined in claim 1 wherein said impermeable layer is compacted bottom soil.
4. The tidal flow constructed wetland system suitable for northern cold regions as claimed in claim 1, wherein the multi-layer filler layer comprises three layers, the upper filler layer has a particle size of 8-15mm, the middle filler layer is crushed stone with a particle size of 16-32mm, and the lower filler layer is crushed stone with a particle size of 32-50 mm.
5. The tidal flow constructed wetland system for northern cold regions as claimed in claim 4 wherein the upper filler layer has a thickness that is greater than 50% of the thickness of said multi-layer filler layer.
6. The tidal flow constructed wetland system suitable for northern cold regions as claimed in claim 1, wherein said water permeable wall is formed by stacking metal woven cages filled with water permeable stones, the particle size of said water permeable stones is 50-80mm, the width of said water permeable wall is 0.5-2.5m, and the top height of said water permeable wall is basically consistent with the top height of said multi-layer filler layer.
7. The tidal flow constructed wetland system suitable for northern cold regions as claimed in claim 4, wherein said water purification channel is buried in said multi-layer filler layer portion and further covered with a crushed stone pile having a particle size of 50-80mm, said crushed stone pile is covered with an isolating cloth for isolating said crushed stone pile from said multi-layer filler layer, the top of said crushed stone pile is substantially flush with the bottom of said upper filler layer, said water purification channel comprises a channel body and a channel cover, said channel body is an upper open pipe for receiving and extracting purified sewage, said channel cover has a porous mounting on the upper portion of said channel body, and said channel cover is for allowing purified sewage to flow into said water purification channel and isolating said water purification channel from said crushed stone pile.
8. The tidal flow constructed wetland system suitable for northern cold regions as claimed in claim 1, wherein said water storage trench bottom is covered with a layer of crushed stone for compaction protection of said water storage trench bottom, said water storage trench upper portion is provided with a movable freeze protection cover plate for water freeze protection in said water storage trench in winter.
9. The tidal flow constructed wetland system suitable for northern cold regions as claimed in claim 1, wherein said tidal flow constructed wetland system suitable for northern cold regions is further provided with water outlet wells, each of said water purifying channels being respectively connected to said water outlet wells, said water outlet wells being for receiving purified water discharged from said water purifying channels.
10. The tidal flow constructed wetland system for northern cold regions as claimed in claim 1 wherein said first water inlet pipe is used for introducing sewage in summer and said second water inlet pipe is used for introducing sewage in winter.
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| CN202322918744.9U CN221741108U (en) | 2023-10-30 | 2023-10-30 | Tidal current constructed wetland system suitable for northern cold regions |
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| CN202322918744.9U CN221741108U (en) | 2023-10-30 | 2023-10-30 | Tidal current constructed wetland system suitable for northern cold regions |
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