CN211170066U - A/O type tidal flow artificial wetland capable of operating autonomously - Google Patents
A/O type tidal flow artificial wetland capable of operating autonomously Download PDFInfo
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- CN211170066U CN211170066U CN201921218251.1U CN201921218251U CN211170066U CN 211170066 U CN211170066 U CN 211170066U CN 201921218251 U CN201921218251 U CN 201921218251U CN 211170066 U CN211170066 U CN 211170066U
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Abstract
The utility model belongs to the field of artificial wetland, and relates to an A/O type tidal flow artificial wetland device which carries out the advanced treatment of nitrate nitrogen and the further treatment of organic pollutants and enables tidal flow to operate autonomously through a siphon forming device, comprising an upper tidal flow treatment area and a lower anoxic denitrification area; a siphon sleeve and a siphon water outlet pipe are arranged above the water inlet and distribution plate in the tidal flow treatment area to form a siphon device for controlling the autonomous operation of tidal flow; the bottom of the anoxic denitrification area is provided with a 'feng' -shaped water distribution device consisting of a water distribution main pipe and a water distribution branch pipe, so that the inlet water is uniformly distributed. The utility model provides a novel tidal flow constructed wetland structural style has that carbon source utilization rate is high, organic matter degradation ability is strong, and area is little, the water distribution is even, anti load impact ability advantage such as strong can realize tidal flow constructed wetland autonomous operation.
Description
Technical Field
The utility model belongs to the field of constructed wetland, and relates to an autonomous operation A/O type tidal flow constructed wetland device used for strengthening the treatment of nitrate nitrogen and further treating organic pollutants as a nitrate nitrogen deepening treatment process.
Background
The A/O method is one of the traditional activated sludge methods, and is a sewage denitrification process widely applied to various large and medium-sized sewage treatment plants at present. Wherein, A refers to an anoxic section, the process of the section mainly serves the denitrification process of nitrogen, O refers to an aerobic section, and the process of the section is the main site of the degradation of organic matters and the nitrification process of nitrogen. The A/O process has the advantages of strong impact load resistance, good organic pollutant removal and denitrification efficiency and the like. In order to fully utilize the carbon source in the inlet water to participate in the denitrification process, the A/O method leads the denitrification process, so that in order to ensure the smooth operation of the denitrification process, high-strength nitrification liquid reflux is required. However, this inevitably leads to a portion of the nitrate nitrogen entering the subsequent treatment process, which has a negative effect on the overall nitrogen removal efficiency of the entire wastewater treatment system. At the present stage, along with the gradual deepening of the work of 'five-water co-treatment', the quality of the effluent water of a sewage treatment plant is improved from primary A to quasi-IV to become the urgent requirement of the current sewage treatment work. Therefore, how to make up for the inherent defects of the A/O method, improve the denitrification efficiency of nitrate nitrogen in the subsequent treatment process, improve the removal efficiency of total nitrogen and become the necessary requirement for upgrading and modifying of the sewage treatment plant.
The artificial wetland belongs to one of ecological treatment processes, and utilizes the principles of species symbiosis and material circulation regeneration to purify sewage under the physical and biological effects of substrates, plants and microorganisms of the wetland, so that the benefits of sewage treatment and recycling are maximized. The horizontal subsurface flow constructed wetland and the vertical subsurface flow constructed wetland are widely applied to deep purification treatment of nitrogen and phosphorus removal processes of small and medium-sized urban sewage plants at present, have the advantages of low construction and operation cost, simple and convenient management, high effluent quality and the like compared with the traditional sewage biological treatment process, and become beneficial supplement of the traditional activated sludge process.
The tidal flow artificial wetland is characterized in that on the basis of the traditional vertical subsurface flow artificial wetland, the rise and fall of the operating water level are artificially controlled, so that the periodic change of the flooded water level in the artificial wetland is realized, the substrate is repeatedly exposed to the atmosphere, conditions are provided for the update of a gas-liquid interface in the substrate, and the possibility is provided for improving the reoxygenation efficiency of the artificial wetland. The tidal flow artificial wetland is mainly used for absorbing O in the atmosphere by utilizing pore suction generated by tidal operation of a saturated wetting surface of a bed body2The oxygen is sucked into the bed body, the oxygen transmission quantity and the utilization efficiency in the wetland bed body are improved, the degradation of organic matters of the artificial wetland and the nitrification process of ammonia nitrogen are further enhanced, and the problem of low reoxygenation rate of the traditional artificial wetland is better solved. However, from the actual operation effect, the flooding and emptying time and speed of the tidal flow artificial wetland need to be manually controlled, and higher requirements are put forward on the precision and accuracy of the control. In the actual operation process, the tidal flow artificial wetland generally has the defects of high labor intensity, poor control precision and low production efficiency. How to realize the autonomous operation of the tidal flow artificial wetland and improve the control precision of the flooding and emptying time of the tidal flow artificial wetland, thereby improving the pollutant removal efficiency of the tidal flow artificial wetland is a key problem for further expanding the application field of the tidal flow artificial wetland.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a to the above-mentioned problem that current AO method sewage treatment process and tidal flow constructed wetland technique exist, provide one kind and can realize tidal flow constructed wetland high accuracy autonomous operation, strengthen the denitrification process of the follow-up nitrate nitrogen of AO method, further degrade organic pollutant, show the novel tidal flow constructed wetland device that improves AO method play water quality of water.
The purpose of the utility model is realized through the following technical scheme.
An autonomous operating A/O type tidal flow artificial wetland device comprises an upper tidal flow treatment area and a lower anoxic denitrification area. The tidal flow treatment area and the anoxic denitrification area are of cuboid three-dimensional structures with openings at the upper parts, and are connected through a water inlet and distribution pore plate. The water inlet distribution pore plate is provided with a water distribution hole, the tidal current treatment area is provided with a siphon water outlet pipe and a siphon sleeve, and the siphon sleeve is supported by the sleeve and is tightly connected with the water inlet distribution pore plate. A water outlet pipe of the treatment area is arranged below the water inlet and distribution pore plate, a water distribution mother pipe is arranged at the bottom of the anoxic denitrification area, and a water distribution branch pipe with water distribution holes is arranged on the water distribution mother pipe.
The tidal flow treatment area is composed of a treatment area front side baffle, a treatment area rear side baffle, a treatment area left side baffle, a treatment area right side baffle and a water inlet distribution pore plate enclosure.
The treatment area front side baffle, the treatment area rear side baffle, the treatment area left side baffle, the treatment area right side baffle and the water inlet and distribution hole plate are rectangular plane sheets.
The water distribution holes are uniformly distributed on the water inlet and distribution pore plate, the clear distance between the water distribution holes is equal to the diameter of the water distribution holes, and the ratio of the total area of the water distribution holes to the area of the upper surface of the water inlet and distribution pore plate is 15-20%.
Foretell siphon sleeve seals and lower open-ended hollow cylinder for last, sets up perpendicularly on the water distribution orifice plate of intaking, and the bottom is passed through the sleeve and is supported and be connected with the water distribution orifice plate of intaking, and the lower clearance between inside and the sleeve support of following of siphon sleeve bottom is as siphon gap of intaking.
The siphon water outlet pipe is vertically arranged at the central position of the siphon sleeve, a siphon water outlet gap is formed between the top end of the siphon water outlet pipe and the top cover of the siphon sleeve, the bottom end of the siphon water outlet pipe penetrates through the water inlet distribution pore plate and is tightly connected with the left end of the water outlet pipe of the treatment area through the equal-diameter 90-degree elbow, and the right end of the water outlet pipe of the treatment area penetrates through the right baffle of the denitrification area and extends out of the outer side of.
The length and the width of the anoxic denitrification area are the same as those of the tidal current treatment area, and the anoxic denitrification area is formed by a front side baffle plate of the denitrification area, a rear side baffle plate of the denitrification area, a left side baffle plate of the denitrification area, a right side baffle plate of the denitrification area and a bottom plate of the denitrification area.
The front baffle of the anoxic denitrification area, the rear baffle of the denitrification area, the left baffle of the denitrification area, the right baffle of the denitrification area and the bottom plate of the denitrification area are rectangular plane sheets.
The water distribution branch pipes are arranged in a symmetrical mode with the pipe center line of the water distribution main pipe as a symmetry axis, are perpendicular to the water distribution main pipe and are horizontally arranged in a shape like a Chinese character feng in a bilateral symmetry mode, and the water distribution holes are round small holes and are respectively arranged on the round outer walls of the water distribution branch pipes and are symmetrically distributed on two sides of the pipe center axis of the water distribution branch pipes.
Compared with the prior art, the utility model has the advantages of it is following:
(1) the utilization efficiency of the carbon source is high, and the organic matters are well degraded. The utility model discloses with the anoxic zone leading, place the oxygen deficiency denitrification district before the tidal current treatment area, be favorable to the surplus carbon source in the make full use of upper reaches technology goes out water, make the surplus carbon source can more effectually serve in the denitrification process, simultaneously, if organic matter content is too much in the coming water, can obtain fully degrading in the tidal current treatment area again.
(2) The automatic operation, continuous operation and high precision. The outlet water of the device is controlled by the relative height of the siphon outlet pipe and the water level of the tidal current treatment area, so that the purposes of improving the precision of the device and enabling the device to operate autonomously and work continuously are achieved.
(3) The reoxygenation rate of the tidal flow treatment area is high. The water level in the treatment area automatically rises and falls, so that the oxygen transmission capacity in the wetland bed body can be improved, microorganisms in the matrix can obtain sufficient oxygen, the oxygen environment of the wetland is improved, and the removal effect of organic matters and ammonia nitrogen is further enhanced.
(4) The denitrification area has better anoxic condition. Ordinary tidal current constructed wetland can not provide better oxygen deficiency condition for total nitrogen removal rate is on the low side, and this device denitrification district is located the water layer lower part for a long time during operation, and is better with the isolation of air, can provide better oxygen deficiency environment, makes better going on of denitrification.
(5) The load impact resistance is strong. The anoxic denitrification area is in a flooded state for a long time, and the inlet water can be rapidly mixed with the original sewage in the anoxic denitrification area, so that the fluctuation of inlet water flow and water quality change can be effectively relieved, and the pollution load of the subsequent wetland is reduced.
(6) The water distribution is uniform. The denitrification area adopts 'feng' shaped water distribution, the distance of the water distribution holes is arranged according to the water head loss along the longitudinal change rule of the water distribution main pipe and the water distribution branch pipe, and the water distribution holes are uniformly distributed on the bottom plate of the treatment area, so that the uniform water inlet of the wetland can be ensured.
(7) The occupied area is small. The tidal flow treatment area and the anoxic denitrification area are jointly built in the vertical direction, so that the land occupation is effectively reduced.
Drawings
Fig. 1 is a top view of an autonomous operating a/O type tidal flow constructed wetland of the present invention.
Fig. 2 is a front view of an autonomous operating a/O type tidal flow constructed wetland of the present invention.
Fig. 3 is a side view of an autonomous operating a/O type tidal flow constructed wetland of the present invention.
Fig. 4 is a sectional view taken along line i-i of fig. 1.
Fig. 5 is a sectional view taken along line ii-ii of fig. 1.
Fig. 6 is a cross-sectional view iii-iii of fig. 4.
Fig. 7 is a schematic view of point a in fig. 1.
Fig. 8 is a schematic view of point B of fig. 5.
Detailed Description
The following are specific embodiments of the present invention and the technical solutions of the present invention are further described with reference to the accompanying fig. 1-8, but the present invention is not limited to these embodiments.
An autonomous operating A/O type tidal flow artificial wetland device comprises an upper tidal flow treatment area 1 and a lower anoxic denitrification area 2. The tidal flow treatment area 1 and the anoxic denitrification area 2 are of cuboid three-dimensional structures with openings at the upper parts, and the tidal flow treatment area 1 is connected with the anoxic denitrification area 2 through a water inlet and distribution pore plate 15. The water inlet distribution pore plate 15 is provided with a water distribution hole 151, the tidal current treatment area 1 is provided with a siphon water outlet pipe 16 and a siphon sleeve 18, and the siphon sleeve 18 is tightly connected with the water inlet distribution pore plate 15 through a sleeve support 19. A water outlet pipe 17 of the treatment area is arranged below the water inlet and distribution hole plate 15, a water distribution mother pipe 27 is arranged at the bottom of the anoxic denitrification area 2, and water distribution branch pipes 280, 281, 282, 283, 284, 285, 286, 287, 288 and 289 with water distribution holes 2800 are arranged on the water distribution mother pipe 27.
The tidal flow treatment area 1 is formed by surrounding baffles of a treatment area front side baffle 11, a treatment area rear side baffle 12, a treatment area left side baffle 13, a treatment area right side baffle 14 and a water inlet distribution pore plate 15, and the baffles are tightly connected with one another and the baffles are tightly connected with the water inlet distribution pore plate 15.
The treatment area front side baffle 11, the treatment area rear side baffle 12, the treatment area left side baffle 13 and the treatment area right side baffle 14 are all rectangular plane thin plates. The water inlet and distribution pore plate 15 is a perforated rectangular plane thin plate and is arranged at the bottom of the tidal flow treatment area 1, and the function of the water inlet and distribution pore plate is to ensure that the water inlet and distribution in the tidal flow treatment area 1 are uniform. The water inlet and distribution hole plate 15 is provided with a water distribution hole 151.
The water distribution holes 151 are uniformly distributed on the water inlet distribution pore plate 15, the clear distance between the water distribution holes 151 is equal to the diameter of the water distribution holes 151, and the ratio of the total area of the water distribution holes 151 to the area of the upper surface of the water inlet distribution pore plate 15 is 15-20%.
The siphon water outlet pipe 16 is a cylindrical hollow pipeline with two open ends, the diameter of the siphon water outlet pipe is 40% -70% of the diameter of the siphon sleeve 18, and the siphon water outlet pipe is vertically arranged in the center of the siphon sleeve 18. The top of the siphon pipe forms a siphon water outlet gap 162 with the gap of the siphon sleeve top cap 181, and the height of the siphon water outlet gap 162 is 30% of the diameter of the siphon sleeve 18. The bottom end of the siphon water outlet pipe 16 penetrates through the water inlet and distribution pore plate 15 and is tightly connected with the water outlet pipe 17 of the treatment area through an equal-diameter 90-degree elbow.
The treatment area outlet pipe 17 be the cylindrical cavity pipe that both ends are uncovered that the level set up, the height that the line apart from treatment area water distribution orifice 15 of intaking in the pipe is 20% -40% of denitrification district 2 height, and its diameter is the same with siphon outlet pipe 16, and the left end is through equal-diameter 90 elbows and siphon outlet pipe 16's bottom zonulae occludens, and the right-hand member passes oxygen deficiency denitrification district right side baffle 14 and stretches out the oxygen deficiency denitrification district 2 outsides.
The siphon sleeve 18 is a hollow cylinder with a sealed upper end and is vertically arranged at the center of the water inlet and distribution pore plate 15. The height of the siphon sleeve 18 is 90% -95% of the height of the tidal flow treatment area 1, and the bottom end of the siphon sleeve is connected with the water inlet distribution hole plate 15 through a sleeve support 19. The circular gap formed by the lower edge of the bottom end of the siphon sleeve 18 and the water inlet distribution pore plate 15 is a siphon water inlet gap 161. The height of the siphon inlet gap 161 is one tenth of the diameter of the siphon sleeve 18.
The sleeve support 19 is vertically arranged between the siphon sleeve 18 and the water inlet distribution hole plate 15, and supports the siphon sleeve 18. The sleeve supports 19 are solid columns with annular horizontal cross sections, the area of the horizontal cross sections is 10% -25% of that of the siphon sleeve 18, 4 sleeve supports are evenly arranged in a 360-degree annular array, and the included angle between the sleeve supports 19 is 90 degrees.
The anoxic denitrification zone 2 comprises a denitrification zone front side baffle 21, a denitrification zone rear side baffle 22, a denitrification zone left side baffle 23, a denitrification zone right side baffle 24, a denitrification zone bottom plate 25, a water inlet pipe 26, a water distribution mother pipe 27, water distribution branch pipes 280, 281, 282, 283, 284, 285, 286, 287, 288 and 289.
The anoxic denitrification zone 2 is formed by surrounding and blocking a denitrification zone front side baffle 21, a denitrification zone rear side baffle 22, a denitrification zone left side baffle 23, a denitrification zone right side baffle 24 and a denitrification zone bottom plate 25, and all the baffles are tightly connected with one another and are tightly connected with the denitrification zone bottom plate 25.
The front baffle 21 of the denitrification zone, the rear baffle 22 of the denitrification zone, the left baffle 23 of the denitrification zone, the right baffle 24 of the denitrification zone and the bottom plate 25 of the denitrification zone are all rectangular thin plates. The width of the denitrification zone front side baffle 21, the denitrification zone rear side baffle 22, the denitrification zone left side baffle 23 and the denitrification zone right side baffle 24 is respectively equal to that of the treatment zone front side baffle 11, the treatment zone rear side baffle 12, the treatment zone left side baffle 13 and the treatment zone right side baffle 14, and the denitrification zone front side baffle, the denitrification zone rear side baffle 22, the denitrification zone left side baffle 23 and the denitrification zone right side baffle 24 are respectively and tightly connected with each baffle of the tidal current treatment zone 1. The length and width of the denitrification zone bottom plate 25 are equal to the water inlet and distribution pore plate 15. The water inlet pipe 26 is arranged at the outer side of the denitrification zone left baffle 23 and close to the denitrification zone bottom plate 25, and the water distribution main pipe 27 is arranged at the inner side of the denitrification zone left baffle 23 and is at the same horizontal height with the water inlet pipe 26. The water distribution branch pipes 280, 281, 282, 283, 284, 285, 286, 287, 288 and 289 are perpendicular to the water distribution main pipe 27 and are arranged in a shape like a Chinese character 'feng'.
The water inlet pipe 26 and the water distribution main pipe 27 are cylindrical hollow pipes, the diameters of the water inlet pipe and the water distribution main pipe are 70% -90% of those of the siphon water outlet pipe 16, and the distance between the center line of the pipe and the bottom plate 25 of the denitrification area is 10% -30% of the height of the denitrification area 2. The water inlet pipe 26 vertically passes through the baffle 23 at the left side of the denitrification zone and is tightly connected with the water distribution main pipe 27 at the inner side of the baffle 23 at the left side of the denitrification zone. The water distribution main pipe 27 is horizontally arranged at the bottom of the anoxic denitrification area 2, is positioned in the middle, is vertical to the baffle 24 on the right side of the denitrification area and is tightly connected with the baffle.
The water distribution branch pipes 280, 281, 282, 283, 284, 285, 286, 287, 288 and 289 are cylindrical hollow pipes, and the diameter of the water distribution branch pipes is 30 to 50 percent of that of the water distribution main pipe 27. The central line of the main water distribution pipe 27 is taken as a symmetry axis, and the branch water distribution pipes 280, 281, 282, 283 and 284 are respectively symmetrical to the branch water distribution pipes 285, 286, 287, 288 and 289. The starting ends of the water distribution branch pipes 280, 281, 282, 283, 284, 285, 286, 287, 288 and 289 are all perpendicular to the central line of the water distribution main pipe 27, and the tail ends are respectively perpendicular to the front side baffle 21 of the denitrification area and the rear side baffle 22 of the denitrification area and are respectively tightly connected with the front side baffle 21 of the denitrification area and the rear side baffle 22 of the denitrification area. The spacing between the water distribution branch pipes 280, 281, 282, 283 and 284 and the spacing between the water distribution branch pipes 285, 286, 287, 288 and 289 are both 20% of the width of the anoxic denitrification zone 2, and the spacing between the water distribution branch pipes 280 and 285 and the baffle 23 on the left side of the denitrification zone and the spacing between the water distribution branch pipes 284 and 289 and the baffle 24 on the right side of the denitrification zone are both 10% of the width of the anoxic denitrification zone 2. The water distribution branch pipes 280, 281, 282, 283, 284, 285, 286, 287, 288 and 289 are all provided with water distribution holes 2800.
The water distribution holes 2800 are small circular holes, are respectively arranged on the circular outer walls of the water distribution branch pipes 280, 281, 282, 283, 284, 285, 286, 287, 288, 289, and are symmetrically arranged on two sides of the central axis of the water distribution branch pipes 280, 281, 282, 283, 284, 285, 286, 287, 288, 289. To ensure uniform water distribution, the distances between the water distribution holes 2800 in the water distribution branch pipes 280, 281, 282, 283, 284, 285, 286, 287, 288, 289 are gradually reduced along the water flow direction. On the water distribution branch pipes 280, 285, the center distance between the first two water distribution holes 2800 is 17 times the diameter along the water flow direction, and gradually decreases according to the gradient of 10%. In the distribution branch pipes 281 and 286, the distance between the centers of the first two distribution holes 2800 is 16 times the diameter in the water flow direction, and gradually decreases according to a gradient of 10%. In the water distribution branch pipes 282, 287, the center-to-center distance between the first two water distribution holes 2800 is 15 times the diameter in the water flow direction, and gradually decreases according to a gradient of 10%. On the water distribution branch pipes 283, 288, the distance between the centers of the first two water distribution holes 2800 is 14 times the diameter along the water flow direction, and gradually decreases according to the gradient of 10%. In the water distribution branch pipes 284 and 289, the center-to-center distance between the first two water distribution holes 2800 is 13 times the diameter in the water flow direction, and gradually decreases according to a gradient of 10%.
Additionally, the utility model discloses a main part (tidal current treatment zone 1, oxygen deficiency denitrification zone 2) can be made by the mould pressing of the thick PE of 8 ~ 10mm, PVC or PPP material, also can be made by the stainless steel panel beating welding of 1mm ~ 3mm thickness, or is formed by concrete placement and prevention of seepage membrane pavement. The height of the tidal flow treatment zone 1 is 700-1000 mm, the length and the width are 800-1500 mm, and the height of the anoxic denitrification zone 2 is 500-800 mm, and the length and the width are 800-1500 mm. The diameter of the siphon sleeve 18 is 200-250 mm, and the water outlet pipe 16, the water outlet pipe 17 of the treatment area, the water inlet pipe 26, the water distribution main pipe 27 and the water distribution branch pipes 280, 281, 282, 283, 284, 285, 286, 287, 288 and 289 are selected according to the mutual proportional relation with the diameter of the siphon sleeve 18. The diameter of the water distribution holes 151 is 8-10 mm, and the diameter of the water distribution holes 2800 is 6-10 mm.
The utility model discloses a theory of operation is:
(1) and (5) setting the process. The utility model can be used for strengthening the treatment of nitrate nitrogen and further treating organic pollutants, and can be used as A/O denitrification or A2The subsequent treatment process of the/O nitrogen and phosphorus removal method is used as the advanced treatment of nitrate nitrogen.
(2) And filling the matrix. The utility model discloses after the equipment is accomplished, can directly fill matrix in tidal current treatment area 1, oxygen deficiency denitrification area 2. Different types or sizes of substrates or combinations of substrates may be filled depending on the treatment target contaminant. The tidal flow treatment zone 1, which is primarily intended for the removal of organic matter, may be filled with gravel, zeolite, slag, etc. The anoxic denitrification area 2 mainly aims at treating nitrate nitrogen and can be filled with anthracite, biological ceramsite, steel slag and the like.
(3) And (5) transplanting the plants. After the substrate is filled, different aquatic plants with corresponding water purification functions can be planted above the tidal flow treatment area 1. The principle of plant selection is as follows: local plants are preferably selected, and foreign plants are carefully introduced, so that the problem of introducing biological safety is avoided; selecting plants with strong decontamination capability and good purification effect; selecting plants with developed root systems and flourishing stems and leaves; the stress-resistant plants are selected. The plant species can be selected from canna, reed, calamus, cattail, etc. After the plant is transplanted to a seedling revival stage, nutrient solution can be prepared to promote the growth of plant roots and stems, and the plant can adapt to a new artificial wetland substrate environment as soon as possible.
(4) And (5) starting. After the plants grow stably, the water can be intermittently injected into the corresponding upstream process water through the water inlet pipe 26, and the water level is gradually reduced, so that the plant root system is promoted to extend towards the inside of the substrate. Simultaneously utilizes an inoculation training method of activated sludge, namely an A/O method or an A method2And residual sludge in the secondary sedimentation tank in the/O method is inoculated to the wetland, so that the abundance of functional flora in the artificial wetland is increased. And in the later stage, the concentrations of organic pollutants and nitrate nitrogen in the inlet water are increased, the microorganisms are domesticated, and dominant strains are screened. And monitoring the effluent quality until water is normally fed in. And after the quality of the effluent is stable, the artificial wetland can be considered to complete the starting stage.
(5) And (5) operating. The water from the upstream process enters the water distribution mother pipe 27 through the water inlet pipe 26, then flows to the water distribution branch pipes 280, 281, 282, 283, 284, 285, 286, 287, 288 and 289, and is uniformly distributed through the water distribution holes 2800, thus entering the anoxic denitrification area 2 for denitrification. After the water level of the anoxic denitrification area 2 rises to the water inlet and distribution hole plate 15, the water is uniformly distributed through the water distribution holes 151 and then enters the tidal flow treatment area 1. The water level rises progressively and as the water level in the tidal flow treatment zone 1 rises above the sleeve support 19, a portion of the sewage enters the annular space between the siphon sleeve 18 and the siphon outlet pipe 16 via the siphon water inlet gap 161; when the water level of the tidal current treatment area 1 is higher than the top end of the siphon water outlet pipe 16, the incoming water overflows into the siphon water outlet pipe 16 and is discharged out of the tidal current treatment area 1 through the water outlet pipe 17 of the treatment area, the siphon forming condition is met, the siphon effect is formed, the water level of the tidal current treatment area 1 automatically discharges water, and the water level begins to gradually drop. The siphon action enables the outlet water to continuously enter the siphon sleeve 18 from the siphon water inlet gap 161, the water level is higher than the top end of the siphon water outlet pipe 16, then enters the siphon water outlet pipe 16 through the siphon water outlet gap 162 and then flows out of the water outlet pipe 17 of the treatment area, the water level of the tidal current treatment area 1 is continuously reduced, at the moment, the air enters the matrix gap, and the tidal current treatment area 1 carries out the reoxygenation process; when the water level is below the bottom end of the siphon sleeve 18, air enters the siphon sleeve 18 and the siphon action is broken, at which point the water level in the tidal stream treatment zone 1 drops to the lowest level and the water discharge stops. Since the inflow water continuously and continuously flows into the tidal flow treatment area 1 through the water distribution holes 151, the water level of the tidal flow treatment area 1 gradually rises again, and the above siphoning water outlet process is repeated after the siphoning conditions are met. According to different requirements of effluent quality, the flow of inlet and outlet water is controlled by combining the change of environmental temperature and additionally adding regulating valves at the water inlet pipe 26 and the water outlet pipe 17 of the treatment area, so that the hydraulic retention time of different areas is changed, the denitrification of the anoxic denitrification area 2 and the reoxygenation process of the tidal flow treatment area 1 are flexibly regulated, and the effluent quality meets the requirements.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (9)
1. An A/O type tidal flow artificial wetland capable of running autonomously comprises an upper tidal flow treatment area and a lower anoxic denitrification area, and is characterized in that: the tidal flow treatment area and the anoxic denitrification area are of cuboid three-dimensional structures with openings at the top, and are connected through a water inlet and distribution pore plate; the water inlet and distribution pore plate is provided with a water distribution hole, the tidal current treatment area is provided with a siphon water outlet pipe and a siphon sleeve, and the siphon sleeve is tightly connected with the water inlet and distribution pore plate through a sleeve support; a water outlet pipe of the treatment area is arranged below the water inlet and distribution hole plate, a water distribution mother pipe is arranged at the bottom of the anoxic denitrification area, and a water distribution branch pipe with water distribution holes is arranged on the water distribution mother pipe.
2. The autonomously operating tidal flow constructed wetland of the a/O type of claim 1, wherein: the tidal flow treatment area is composed of a treatment area front side baffle, a treatment area rear side baffle, a treatment area left side baffle, a treatment area right side baffle and a water inlet distribution pore plate enclosure.
3. The autonomously operating tidal flow constructed wetland of the a/O type of claim 2, wherein: the treatment area front side baffle, the treatment area rear side baffle, the treatment area left side baffle, the treatment area right side baffle and the water inlet and distribution hole plate are rectangular plane thin plates.
4. The autonomously operating tidal flow constructed wetland of the a/O type of claim 1, wherein: the water distribution holes are uniformly distributed on the water inlet and distribution pore plate, the clear distance between the water distribution holes is equal to the diameter of the water distribution holes, and the ratio of the total area of the water distribution holes to the area of the upper surface of the water inlet and distribution pore plate is 15-20%.
5. The autonomously operating tidal flow constructed wetland of the a/O type of claim 1, wherein: siphon sleeve seals and lower open-ended hollow cylinder for last, sets up perpendicularly on the water distribution orifice plate of intaking, and the bottom is passed through the sleeve and is supported and be connected with the water distribution orifice plate of intaking, and the lower clearance between inside and the sleeve support of following of siphon sleeve bottom is as siphon gap of intaking.
6. The autonomously operating tidal flow constructed wetland of the a/O type of claim 1, wherein: siphon outlet pipe sets up perpendicularly in the telescopic central point of siphon puts, and the clearance of its top and siphon sleeve top cap forms siphon play water gap, and the bottom passes into water distribution orifice plate, through equal-diameter 90 elbows and treatment area outlet pipe left end zonulae occludens, and treatment area outlet pipe right-hand member passes the denitrification district right side baffle and stretches out the oxygen deficiency denitrification district outside.
7. The autonomously operating tidal flow constructed wetland of the a/O type of claim 1, wherein: the length and the width of the anoxic denitrification area are the same as those of the tidal current treatment area, and the anoxic denitrification area is formed by a front side baffle plate of the denitrification area, a rear side baffle plate of the denitrification area, a left side baffle plate of the denitrification area, a right side baffle plate of the denitrification area and a bottom plate of the denitrification area.
8. The autonomously operating tidal flow constructed wetland of the a/O type of claim 5, wherein: the front side baffle of the anoxic denitrification area, the rear side baffle of the denitrification area, the left side baffle of the denitrification area, the right side baffle of the denitrification area and the bottom plate of the denitrification area are rectangular plane thin plates.
9. The autonomously operating tidal flow constructed wetland of the a/O type of claim 1, wherein: the water distribution branch pipes are arranged in a symmetrical mode with the center line of the main water distribution pipe as a symmetry axis, are perpendicular to the main water distribution pipe and are horizontally arranged in a shape like a Chinese character feng in a bilateral symmetry mode, and the water distribution holes are round small holes and are respectively arranged on the round outer walls of the water distribution branch pipes and are symmetrically distributed on two sides of the central pipe axis of the water distribution branch pipes.
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| CN110330109A (en) * | 2019-07-30 | 2019-10-15 | 台州学院 | A kind of A/O type tidal flow artificial wetland of autonomous operation |
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