River and lake bank slope discharge port in-situ purification device

Abstract

According to the in-situ purification device for the bank slope discharge port of the river and the lake, a precipitation area comprises a precipitation tank arranged around the bank slope discharge port, and a garbage separation basket is hung at a tank opening of the precipitation tank; the filler purification area is arranged around the settling area and comprises a sand soil layer, a filler layer and a supporting layer in the longitudinal direction; the filler layer is provided with a breather pipe penetrating through the sand soil layer; a water outlet hole communicated with the filler purification area is formed in the bottom side wall of the precipitation tank. Large garbage is separated through the garbage separation basket, and suspended particles are settled in the primary settling tank; the hydraulic retention time is prolonged through the baffle plate, and the adsorption purification effect is enhanced; and residual pollutants are deeply purified through submerged plants. The filler purification box is beneficial to growth of microorganisms, the removal rate of nitrogen and phosphorus is high, and the occupied area is small; the built-in ventilation pipe solves the problem that the upper-layer substrate in the vertical flow wetland is easy to block, and the ventilation cap accelerates air circulation in the pipe under the driving of natural wind, so that the interior of the filler layer is pushed to be converted from anaerobic and anoxic states to aerobic states, and the service life of the purification box is prolonged.

Description

Technical Field

[0001] The present invention relates to a purification device, in particular to an in-situ purification device for a river or lake bank slope outlet, belonging to the technical field of sewage treatment. Background Art

[0002] With the continuous development of the economy, society and urbanization, more and more industrial wastewater and domestic sewage are discharged into rivers and lakes. The quality of the discharged water into the river (lake) outlet directly determines its impact on the water environment.

[0003] Currently, drainage systems can be divided into two types: combined and separate systems. Separate systems use separate pipes for rainwater and sewage, while combined systems use the same pipes for rainwater and sewage. During periods of rainfall, the volume of water in the combined sewer network increases with precipitation. When the volume of water in the network exceeds the load of the main pipeline network and the treatment capacity of the sewage treatment plant, the excess rainwater and sewage overflow into rivers and lakes. If the discharged pollution load exceeds the carrying capacity of the water environment, it will cause a significant decline in the water quality of rivers and lakes, and may even form black and smelly water bodies.

[0004] In recent years, with the continuous improvement of the rainwater and sewage separation transformation of the pipeline network, the overflow pollution situation of river and lake outlets has been significantly improved.

[0005] However, some areas still face slow progress in rainwater and sewage diversion renovations, misconnections or mixed connections in completed areas leading to sewage discharge, and leaks in intercepting sewage pipes. In addition to overflow pollution during the rainy season, some sewage inevitably enters the pipe network and is discharged into the aquatic environment through outlets, resulting in the frequent occurrence of "sunny-day sewage discharge" at rainwater outlets.

[0006] If the problems of "sewage discharge on sunny days" and overflow in rainy seasons at these outlets are not effectively controlled, then over time, the balance of the water body's self-purification capacity will be broken, causing the water body to turn black and smelly again.

[0007] Therefore, it is necessary to provide an in-situ purification device for river and lake bank slope outlets. Summary of the Invention

[0008] In order to solve the deficiencies of the prior art, the purpose of the present invention is to provide an in-situ purification device for river and lake bank slope outlets.

[0009] In order to achieve the above objectives, the present invention adopts the following technical solutions:

[0010] An in-situ purification device for river and lake bank slope outlets, comprising a sedimentation area and a filler purification area;

[0011] The sedimentation area includes a sedimentation tank arranged around the bank slope outlet, and the garbage separation basket is hung on the notch of the sedimentation tank;

[0012] The filler purification zone is arranged around the sedimentation zone and includes a sand layer, a filler layer and a supporting layer in the longitudinal direction; the filler layer is provided with a ventilation pipe penetrating the sand layer;

[0013] The bottom side wall of the sedimentation tank is provided with a water outlet hole which is connected to the filler purification area.

[0014] A biological enhanced treatment area is set up around the above-mentioned filler purification area, including fir piles arranged in a ring shape around the filler purification area, submerged plants are planted inside the ring, and biological wax is hung.

[0015] The garbage separation basket is provided with multiple layers of detachable interception nets.

[0016] Furthermore, the above-mentioned interception net is composed of two layers, the mesh of the upper interception net is 40-50mm, and the mesh of the lower interception net is 10-20mm.

[0017] The filler purification area is arranged in the filler purification box, the sand layer is placed on the top and is open, the supporting layer is placed on the bottom, and a water outlet pipe is provided on the bottom side.

[0018] Furthermore, the filler purification box is provided with a baffle for separating the sand layer, the filler layer and the supporting layer.

[0019] The above-mentioned sandy soil layer is composed of gravel with a particle size of 5-15 mm;

[0020] The filler layer is composed of zeolite with a particle size of 15-30 mm, biochar, volcanic slag, and blast furnace slag, which are mixed in a ratio of 80:10:5:5-90:6:2:2;

[0021] The supporting layer is composed of gravel or pebbles with a particle size of 30-60 mm.

[0022] The thickness ratio of the sand layer, filler layer and supporting layer is 1:1.5:1-1:2:1.

[0023] The above-mentioned ventilation pipe is L-shaped, with the bottom buried horizontally at 1 / 3-2 / 3 of the height of the filler layer, and the top extending to 10-15 cm above the sand layer;

[0024] The bottom wall of the horizontally buried pipe is provided with a number of small holes with a diameter of 3-5 cm, and the outside of the pipe wall is wrapped with an anti-blocking net; the top opening is provided with a ventilation cap.

[0025] The submerged plants are one or more of pink-green foxtail algae, black algae, and golden hornwort.

[0026] The present invention is beneficial in that:

[0027] The in-situ purification device for river and lake bank outlets of the present invention strengthens the separation of large garbage and the sedimentation of suspended particles in rainwater and sewage water through the combination of a garbage separation basket and a primary sedimentation tank; the garbage in the basket and the solid particles deposited on the bottom of the tank can be regularly removed by the movable garbage separation basket; by arranging baffles between the sand layer, the filler layer and the supporting layer in the filler purification box, the rainwater and sewage can be changed from flowing longitudinally from the surface of the filler box to the bottom to being deflected and then flowing out through each filler layer, thereby effectively increasing the hydraulic retention time of the rainwater and sewage in the filler purification box, so that each layer of filler and the microorganisms attached thereto have better adsorption and purification effects; the submerged plants and microorganisms in the biological enhanced treatment area are used to deeply purify the remaining pollutants in the water, and at the same time, the submerged plants can also have a good aesthetic effect, thereby improving the landscape around the outlet.

[0028] The filler purification box of the utility model is designed to imitate the vertical flow artificial wetland, and has the advantages of being conducive to the growth of microorganisms, having a high nitrogen and phosphorus removal rate, and occupying a small area. By setting up a number of ventilation pipes, the problem that the upper layer of the matrix in the vertical flow wetland is prone to clogging is solved. Moreover, by means of the unpowered ventilation cap arranged at the pipe mouth, the air circulation in the pipe is accelerated under the drive of natural wind, thereby promoting the transformation of the inside of the filler layer from anaerobic and anoxic state to aerobic state, which is beneficial to reducing the clogging of the matrix and extending the service life of the purification box. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the structure of the in-situ purification device for river and lake bank outlets.

[0030] Figure 2 for Figure 1 A top view of a structural diagram.

[0031] The meanings of the symbols in the accompanying drawings are as follows:

[0032] 1. Sedimentation area, 2. Filler purification area, 3. Bio-enhanced treatment area;

[0033] 11. Garbage separation basket, 12. Sedimentation tank, 13. Water outlet;

[0034] 21. Sand layer, 22. Filling layer, 23. Support layer, 24. Baffle, 25. Ventilation pipe, 26. Water outlet pipe;

[0035] 31. Fir wood piles, 32. Submerged plants, 33. Biowax. DETAILED DESCRIPTION

[0036] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] An in-situ purification device for river and lake bank slope outlets consists of a sedimentation area 1, a filler purification area 2 and a biological enhancement treatment area 3.

[0038] The sedimentation area 1 consists of a sedimentation tank 12 and a garbage separation basket 11. The sedimentation tank 12 faces the river or lake bank slope outlet. The garbage separation basket 11 is suspended from the notch of the sedimentation tank 12 and is a movable basket structure. The garbage separation basket 11 is installed with a detachable upper and lower interception net. Preferably, the interception net is a knotless mesh, with the upper mesh of 40-50mm and the lower mesh of 10-20mm.

[0039] Preferably, several expansion screws are provided in the middle of the sedimentation tank 12 to support the garbage separation basket 11, ensuring a more stable placement of the garbage separation basket 11 above the sedimentation tank 12. The garbage separation basket 11 is used to intercept large pieces of garbage in rainwater and sewage, preventing them from entering the sedimentation tank 12 and clogging the water outlet. The basket is a movable structure, facilitating regular cleaning of the captured garbage.

[0040] After the rainwater and sewage are initially precipitated in the sedimentation tank 12, they overflow into the filler purification box through a plurality of water outlet holes provided on the bottom sidewall of the sedimentation tank 12. After the basket body of the garbage separation basket 11 is removed, it is also convenient to clean the solid particles accumulated in the sedimentation tank 12.

[0041] The packing purification zone 2 is arranged around the sedimentation zone 1. Along the longitudinal direction, it is composed of a sand layer 21, a packing layer 22, and a supporting layer 23. Preferably, the packing purification zone 2 is arranged in a packing purification box with an open top. Two layers of baffles 24 are provided in the packing purification box to separate the sand layer 21 and the packing layer 22, and the packing layer 22 and the supporting layer 23. The water flow directions of the two layers of baffles 24 are respectively arranged on both sides of the packing purification box; that is, the water flows in an "H" shape in the packing purification box, and a number of water outlet pipes 26 are evenly distributed at the bottom of the packing water purification box.

[0042] Preferably, the filler purification box is a brick or concrete structure.

[0043] Preferably, the bottom of the sedimentation tank 12 abuts against the top of the filler purification box.

[0044] Preferably, the sand layer 21 is composed of gravel with a particle size of 5-15 mm; the filler layer 22 is composed of zeolite, biochar, volcanic slag, and blast furnace slag with a particle size of 15-30 mm, mixed in a ratio of 80:10:5:5-90:6:2:2; the supporting layer 23 is composed of gravel or pebbles with a particle size of 30-60 mm; wherein the thickness ratio of the sand layer 21, the filler layer 22, and the supporting layer 23 is 1:1.5:1-1:2:1.

[0045] An L-shaped ventilation pipe 25 is also provided in the packing purification box. The horizontal pipe at the bottom is buried at 1 / 3-2 / 3 of the height of the packing layer 22, the vertical pipe penetrates the sand layer 21, and the top pipe mouth extends out of the sand layer 2110-15cm; and the pipe wall of the horizontal pipe buried in the packing layer 22 is evenly opened with a number of small holes with a diameter of 3-5cm, and the outside of the pipe wall is wrapped with an anti-blocking net; the top pipe mouth is installed with a small non-powered ventilation cap.

[0046] When there is more drainage in the rainy season, the water level in the filler purification box remains high, and the buried section of the ventilation pipe is in a submerged anaerobic state.

[0047] When there is no rainfall and the water flow from the outlet is small, the water level in the purification box is lowered, and the buried end of the ventilation pipe can remain exposed. The unpowered ventilation cap on the top of the ventilation pipe can accelerate the air circulation in the pipe driven by natural wind, thereby promoting the transformation of the inside of the filler layer 22 from anaerobic to aerobic state and promoting the growth of related aerobic microorganisms, thereby reducing the blockage of the matrix and extending the service life of the purification box.

[0048] The bio-augmentation treatment zone 3 is located around the filler purification zone 2 and consists of fir stakes 31, submerged plants 32, and bio-wax 33. Preferably, the fir stakes 31 are arranged in a semicircular pattern around the filler purification box; submerged plants 32 are planted between the fir stakes 31 and the filler purification box to form the bio-augmentation treatment zone 3, and the bio-wax 33 is suspended.

[0049] Preferably, the submerged plants 32 can be selected from one or more of the group consisting of pink-green foxtail algae, black algae, and golden hornwort.

[0050] During use,

[0051] The rainwater and sewage from the outlet enter the sedimentation tank 12 after passing through the double-layer mesh in the garbage isolation basket to intercept large pieces of garbage and debris. After the solid particles in the rainwater and sewage in the sedimentation tank 12 undergo preliminary sedimentation, they overflow into the top of the filler purification box through the water outlet 13.

[0052] Baffles 24 are provided between each packing layer 22 in the packing purification box. Rainwater and sewage will not flow directly from the surface of the packing box to the bottom vertically, but will flow in a "self" shape, bend from the surface through each packing layer 22 and then flow out; this effectively increases the hydraulic retention time of rainwater and sewage in the packing purification box, thereby enabling each layer of packing and the microorganisms attached thereto to achieve better adsorption and purification effects.

[0053] After the initially purified rainwater and sewage flow into the bio-enhanced treatment area 3, the abundant submerged plants 32 and microorganisms can deeply purify the remaining pollutants in the water. At the same time, the submerged plants 32 can also have a good aesthetic effect and improve the landscape around the outlet.

[0054] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the above embodiments do not limit the present invention in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation fall within the scope of protection of the present invention.

Claims

1. An in-situ purification device for river and lake bank outlets, characterized in that: Including sedimentation area and filler purification area; The sedimentation area includes a sedimentation tank arranged around the bank slope outlet, and the garbage separation basket is hung on the notch of the sedimentation tank; The filler purification zone is arranged around the sedimentation zone and includes a sand layer, a filler layer and a supporting layer in the longitudinal direction; the filler layer is provided with a ventilation pipe penetrating the sand layer; The bottom side wall of the sedimentation tank is provided with a water outlet hole which is connected to the filler purification area.

2. The purification device according to claim 1, characterized in that The filler purification area is provided with a biological enhanced treatment area, including fir piles arranged in a ring shape on the periphery of the filler purification, submerged plants are planted in the ring, and biological wax is hung.

3. The purification device according to claim 1, characterized in that The garbage separation basket is provided with multiple layers of detachable interception nets.

4. The purification device according to claim 3, characterized in that The interception net is composed of two layers, the mesh of the upper layer interception net is 40-50mm, and the mesh of the lower layer interception net is 10-20mm.

5. The purification device according to claim 1, characterized in that The filler purification area is arranged in the filler purification box, the sand layer is placed on the top and is open, the supporting layer is placed on the bottom, and a water outlet pipe is arranged on the bottom side.

6. The purification device according to claim 5, characterized in that The filler purification box is provided with baffles separating the sand layer, the filler layer and the supporting layer.

7. The purification device according to claim 1, characterized in that The thickness ratio of the sand layer, the filler layer and the supporting layer is 1:1.5:1-1:2:

1.

8. The purification device according to claim 1, characterized in that The ventilation pipe is L-shaped, with the bottom buried horizontally at 1 / 3-2 / 3 of the height of the filler layer, and the top extending to 10-15 cm above the sand layer; The bottom wall of the horizontally buried pipe is provided with a number of small holes with a diameter of 3-5 cm, and the outside of the pipe wall is wrapped with an anti-blocking net; the top opening is provided with a ventilation cap.

9. The purification device according to claim 2, characterized in that The submerged plants are one or more of pink-green foxtail algae, black algae, and golden hornwort.

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