Artificial wetland for treating sewage

Abstract

The invention relates to a constructed wetland for treating sewage, which belongs to the technical field of constructed wetlands and comprises a foundation, a support layer, an adsorption layer, a purification layer, a planting layer, vegetation, an aeration mechanism, a water blocking plate, a water delivery pipe, a water pipe and an air pump. The supporting layer, the adsorption layer, the purification layer and the planting layer are sequentially arranged on the foundation from bottom to top; the vegetation is arranged at the upper end of the planting layer; the aeration mechanism is arranged between the supporting layer and the adsorption layer; the water blocking plate is arranged at a water inlet of the foundation; the water conveying pipe is arranged on the water blocking plate and is communicated with the water blocking plate; the water pipe is arranged at a water inlet of the water pipe; the water pipe is communicated with the water pipe; the rotating mechanism is rotationally arranged on the water pipe; the air pump is arranged on the water pipe; the output end of the rotating mechanism is connected with the air pump through the transmission mechanism; the output end of the air pump is connected with the aeration mechanism; a water outlet is formed in the lower end of the water pipe. Potential energy generated when water flows out is converted into mechanical energy, air pressure is generated, and the air pressure is injected into water through the aeration mechanism.

Description

Technical Field

[0001] This invention relates to the field of constructed wetland technology, and more particularly to an constructed wetland for treating wastewater. Background Technology

[0002] Constructed wetland systems are a novel wastewater treatment technology suitable for various sources of industrial and domestic wastewater. These systems offer advantages such as high hydraulic load, strong purification capabilities, stable long-term operation, low construction and operating costs, and the ability to integrate with landscaping to purify and beautify the environment, making them promising for widespread application.

[0003] Compared to conventional physical, chemical, physicochemical, and biochemical methods, the use of constructed wetland systems for advanced wastewater treatment offers unique advantages: The operating cost of constructed wetland wastewater treatment is very low, typically requiring only a small amount of electricity to raise the influent water level; since constructed wetlands require virtually no electromechanical equipment, they are easy to maintain and manage, while also avoiding high investment and construction costs. Furthermore, wetland plants can be recycled as industrial byproducts and in consumer goods, generating economic benefits. More importantly, the treatment of pollutants in the water can effectively reduce carbon emissions, contributing to efforts to curb global warming.

[0004] Constructed wetlands are used for advanced treatment of secondary effluent, making effluent advanced treatment particularly important. Advancedly treated effluent meets higher water quality standards, making it suitable for discharge, irrigation, or other reuse applications.

[0005] Aeration within constructed wetlands increases dissolved oxygen levels, improving the ammoniation-nitrification-denitrification reactions of organic nitrogen in wastewater by microorganisms and the oxidation of Fe2+ to Fe3+, which then combines with PO3 to form stable compounds. However, existing technologies require air pressure equipment to provide airflow to the aeration devices, necessitating maintenance and incurring high costs. Summary of the Invention

[0006] The purpose of this invention is to address the problems existing in the prior art by proposing an artificial wetland for treating wastewater that converts the potential energy of flowing water into mechanical energy to generate air pressure and injects it into the water through an aeration mechanism.

[0007] The technical solution of the present invention: an artificial wetland for treating sewage, comprising a foundation, a support layer, an adsorption layer, a purification layer, a planting layer, vegetation, an aeration mechanism, a water-blocking frame, a water supply pipe, a water pipe, and an air pump; The support layer, adsorption layer, purification layer, and planting layer are arranged sequentially from bottom to top on the foundation; vegetation is placed on top of the planting layer; the aeration mechanism is located between the support layer and the adsorption layer; the water-blocking frame is located at the water inlet of the foundation; the water supply pipe is located on the water-blocking frame and is connected to the water-blocking frame; the water pipe is located at the water inlet; the water supply pipe is connected to the water pipe; the rotating mechanism is rotatably mounted on the water pipe; the air pump is mounted on the water pipe; the output end of the rotating mechanism is connected to the air pump through a transmission mechanism; the output end of the air pump is connected to the aeration mechanism; and the lower end of the water pipe has a water outlet.

[0008] Preferably, the rotating mechanism includes a support frame, a rotating shaft, and a helical blade; the support frame is mounted on the water pipe; the rotating shaft is rotatably connected to the water pipe and the support frame; the helical blade is mounted on the rotating shaft; and the rotating shaft is driven by an air pump through a transmission mechanism.

[0009] Preferably, the transmission mechanism is a belt drive mechanism; it includes a driving pulley, a driven pulley, and a transmission belt; the driving pulley is mounted on a rotating shaft; the driven pulley is mounted on an air pump; the transmission belt is mounted on the driving pulley and the driven pulley; the size of the driving pulley is larger than that of the driven pulley.

[0010] Preferably, a support net is provided between the support net and the adsorption layer; the aeration mechanism is located below the support net.

[0011] Preferably, a filter frame is installed at the lower end of the water pipe; the filter frame is located below the water outlet.

[0012] Preferably, the planting layer has a stepped structure.

[0013] Preferably, the joints of the stepped structure are inclined and equipped with protective plates.

[0014] Compared with the prior art, the present invention has the following beneficial technical effects: In this invention, sewage is discharged towards the foundation through a discharge channel. The sewage is blocked by a water-blocking barrier, collects at the barrier, and flows into a water pipe. There, it comes into contact with a spiral blade inside the pipe. The potential energy of the water flow drives the spiral blade to rotate, which in turn drives a rotating shaft. A support frame supports the rotating shaft, which in turn drives a high-speed air pump via a transmission mechanism. The impeller inside the air pump generates negative pressure, which is then delivered to an aeration mechanism. This aeration occurs at the output of the aeration mechanism, thus automatically converting the potential energy of the sewage into a working mass when it flows into the foundation. Mechanical energy is then transported to the lower part of the adsorption layer through aeration, improving the efficiency of wastewater treatment without the need for an additional aeration drive mechanism, thus saving energy. After the wastewater flows into the foundation, vegetation is planted on the planting layer. The vegetation obtains nutrients through the planting layer and substances in the water, thereby improving the survival rate of the vegetation. The vegetation is a combination of evergreen aquatic iris, calamus, golden calamus, and daylily. In winter, its removal efficiency for TN, NO, N, NH, N, and TP is 44.2%, 58.5%, 34.6%, and 67.8%, respectively, thus purifying the water. Impurities and sludge in the water fall into the planting layer and purification layer and are filtered by the purification layer. They then flow into the adsorption layer and are adsorbed by the adsorption layer. The aeration mechanism generates aeration that passes through the adsorption layer, purification layer, planting layer, and wastewater, thus purifying the wastewater. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention; Figure 2 This is a schematic diagram showing the water-blocking plate, water supply pipe, and water pipe in their coordinated installation state according to the present invention; Figure 3 This is a schematic diagram of the rotating mechanism in this invention.

[0016] Reference numerals in the attached diagram: 1. Foundation; 2. Support layer; 3. Support net; 4. Adsorption layer; 5. Purification layer; 6. Planting layer; 7. Vegetation; 8. Aeration mechanism; 9. Water blocking frame; 10. Water supply pipe; 11. Water pipe; 12. Rotating mechanism; 1201. Support frame; 1202. Rotating shaft; 1203. Spiral blade; 13. Transmission mechanism; 14. Air pump; 15. Filter frame. Detailed Implementation

[0017] Example 1 like Figure 1-3 As shown, the present invention proposes an artificial wetland for treating sewage, comprising a foundation 1, a support layer 2, an adsorption layer 4, a purification layer 5, a planting layer 6, vegetation 7, an aeration mechanism 8, a water-blocking frame 9, a water supply pipe 10, a water pipe 11, and an air pump 14. Support layer 2, adsorption layer 4, purification layer 5, and planting layer 6 are arranged sequentially from bottom to top on foundation 1; vegetation 7 is arranged on the upper end of planting layer 6; aeration mechanism 8 is arranged between support layer 2 and adsorption layer 4; water blocking plate 9 is arranged at the water inlet of foundation 1; water supply pipe 10 is arranged on water blocking plate 9 and is connected to water blocking plate 9; water pipe 11 is arranged at the water inlet of water pipe 11; water supply pipe 10 is connected to water pipe 11; rotating mechanism 12 is rotatably arranged on water pipe 11; air pump 14 is arranged on water pipe 11; the output end of rotating mechanism 12 is connected to air pump 14 through transmission mechanism 13; the output end of air pump 14 is connected to aeration mechanism 8; and a water outlet is provided at the lower end of water pipe 11.

[0018] The rotating mechanism 12 includes a support frame 1201, a rotating shaft 1202, and a spiral blade 1203; the support frame 1201 is mounted on the water pipe 11; the rotating shaft 1202 is rotatably mounted on the water pipe 11 and connected to the support frame 1201; the spiral blade 1203 is mounted on the rotating shaft 1202; the rotating shaft 1202 is driven and connected to the air pump 14 through the transmission mechanism 13.

[0019] A support net 3 is provided between the support net 3 and the adsorption layer 4; the aeration mechanism 8 is located below the support net 3.

[0020] A filter frame 15 is installed at the lower end of the water pipe 11; the filter frame 15 is located below the water outlet.

[0021] The planting layer 6 has a stepped structure, which can provide a buffer platform so that even if people fall in an accident, they will not fall directly into deep water.

[0022] The joints of the stepped structure are inclined and equipped with protective plates. The protective plates can press down on the inclined parts to protect the planting layer 6 and prevent rapid soil and water loss.

[0023] In this embodiment, sewage is discharged towards the foundation 1 through a discharge channel. The sewage is blocked by a water-blocking plate 9 and collects at the water-blocking plate 9. It then flows into the water pipe 11 through the water delivery pipe 10 and comes into contact with the spiral blade 1203 inside the water pipe 11. The potential energy of the water flow drives the spiral blade 1203 to rotate, which in turn drives the rotating shaft 1202 to rotate. The support frame 1201 supports the rotating shaft 1202. The rotating shaft 1202 drives the air pump 14 to rotate at high speed through the transmission mechanism 13. The impeller structure inside the air pump 14 generates negative pressure, which is delivered to the aeration mechanism 8, so that aeration occurs at the output end of the aeration mechanism 8, thereby achieving... When sewage flows into the foundation 1, it automatically converts potential energy into mechanical energy and then transports it to the adsorption layer 4 via aeration, improving sewage treatment efficiency without the need for an additional aeration drive mechanism, thus saving energy. After the sewage flows into the foundation 1, vegetation 7 is planted on the planting layer 6. The vegetation 7 obtains nutrients through the planting layer 6 and substances in the water, thereby improving the survival rate of the vegetation 7. The vegetation 7 is a combination of evergreen aquatic iris, calamus, golden calamus, and daylily. In winter, its removal efficiency for TN, NO, N, NH, N, and TP is 44.2%, 58.5%, 34.6%, and 67.8%, respectively, thus purifying the water. Impurities and sludge in the water fall onto the planting layer 6 and purification layer 5 and are filtered by the purification layer 5. They then flow into the adsorption layer 4 and are adsorbed by the adsorption layer 4. The aeration mechanism 8 generates aeration that passes through the adsorption layer 4, purification layer 5, planting layer 6, and sewage, thus purifying the sewage.

[0024] Example 2 like Figure 1-3 As shown, the present invention proposes an artificial wetland for treating sewage. Compared with Embodiment 1, the transmission mechanism 13 in this embodiment is a belt drive mechanism; it includes a driving pulley, a driven pulley and a transmission belt; the driving pulley is mounted on the rotating shaft 1202; the driven pulley is mounted on the air pump 14; the transmission belt is mounted on the driving pulley and the driven pulley; the size of the driving pulley is larger than that of the driven pulley.

[0025] In this embodiment, the rotating shaft 1202 drives the active pulley to rotate, and the active pulley drives the driven pulley to rotate through the transmission belt. The driven pulley drives the air pump 14 to rotate, so that the air pump 14 can generate air pressure and deliver it to the aeration mechanism 8. The aeration mechanism 8 generates aeration on the support net 3, thereby improving the efficiency of wastewater treatment.

[0026] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A constructed wetland for treating sewage, characterised in that, The application relates to a water purification and planting device, which comprises a foundation (1), a supporting layer (2), an adsorption layer (4), a purification layer (5), a planting layer (6), vegetation (7), an aeration mechanism (8), a water-blocking section (9), a water conveying pipe (10), a water pipe (11) and a gas pump (14); the supporting layer (2), the adsorption layer (4), the purification layer (5) and the planting layer (6) are sequentially arranged on the foundation (1) from bottom to top; the vegetation (7) is arranged at the upper end of the planting layer (6); the aeration mechanism (8) is arranged between the supporting layer (2) and the adsorption layer (4); the water-blocking section (9) is arranged at the water inlet of the foundation (1); the water conveying pipe (10) is arranged on the water-blocking section (9) and communicates with the water-blocking section (9); the water pipe (11) is arranged at the water inlet of the water pipe (11); the water conveying pipe (10) communicates with the water pipe (11); the rotating mechanism (12) is rotatably arranged on the water pipe (11); the gas pump (14) is arranged on the water pipe (11); the output end of the rotating mechanism (12) is connected with the gas pump (14) through the transmission mechanism (13); the output end of the gas pump (14) is connected with the aeration mechanism (8); and the lower end of the water pipe (11) is provided with a water outlet.

2. A constructed wetland for treating sewage according to claim 1, characterised in that, The rotating mechanism (12) comprises a supporting frame (1201), a rotating shaft (1202) and a spiral blade (1203); the supporting frame (1201) is arranged on the water pipe (11); the rotating shaft (1202) is rotatably arranged on the water pipe (11) and the supporting frame (1201); and the spiral blade (1203) is arranged on the rotating shaft (1202); the rotating shaft (1202) is drivingly connected with the gas pump (14) through the transmission mechanism (13).

3. A constructed wetland for treating sewage according to claim 2, characterised in that, The transmission mechanism (13) is a belt transmission mechanism and comprises a driving belt wheel, a driven belt wheel and a transmission belt; the driving belt wheel is arranged on the rotating shaft (1202); the driven belt wheel is arranged on the gas pump (14); the transmission belt is arranged on the driving belt wheel and the driven belt wheel; and the size of the driving belt wheel is larger than that of the driven belt wheel.

4. The constructed wetland for treating sewage according to claim 1, wherein, A supporting net (3) is arranged between the supporting net (3) and the adsorption layer (4); and the aeration mechanism (8) is located below the supporting net (3).

5. The constructed wetland for treating sewage according to claim 1, wherein, The lower end of the water pipe (11) is provided with a filter frame (15); and the filter frame (15) is located below the water outlet.

6. A constructed wetland for treating sewage according to claim 5, characterised in that, The planting layer (6) has a stepped structure.

7. A constructed wetland for treating sewage according to claim 6, characterised in that, The connecting part of the stepped structure is obliquely arranged and provided with a protection plate.

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