A horizontal well aeration biochemical treatment device for sewage treatment

Abstract

The invention relates to a horizontal well aeration and biochemical treatment device for sewage treatment, comprising a degassing tank, an upstream connecting pipe, a downstream connecting pipe and at least one U-shaped horizontal well, wherein the U-shaped horizontal well comprises an upstream well, an elbow and a downstream well connected in sequence; the two ends of the upstream connecting pipe are respectively connected to the degassing tank and a water inlet of the upstream well, and the two ends of the downstream connecting pipe are respectively connected to the water inlet of the downstream well and the degassing tank, so that water in the degassing tank enters the U-shaped horizontal well through the upstream connecting pipe, undergoes aeration and biochemical treatment in the U-shaped horizontal well, and then returns to the degassing tank through the downstream connecting pipe, forming a circulation loop; an aeration device is provided in the upstream connecting pipe, and a flow-pushing device is provided in the downstream connecting pipe.

Description

Technical Field

[0001] The invention belongs to the technical field of sewage biochemical treatment, and in particular relates to a horizontal well aeration biochemical treatment device for sewage treatment. Background Art

[0002] Aeration is a crucial component of wastewater biochemical treatment systems. Whether using activated sludge or biofilm processes, aeration is generally required in aerobic, anoxic, or even anaerobic tanks to provide a certain amount of oxygen or act as agitator, controlling the dissolved oxygen concentration within the tank and creating a suitable growth environment for microorganisms. Alternatively, a separate aeration tank can be installed specifically to oxygenate the water. Aeration releasers, commonly placed at the bottom of the tank, typically have low oxygen utilization rates, ranging from 15-40%. Summary of the Invention

[0003] In response to the above problems, the present invention provides a horizontal well aeration biochemical treatment device for sewage treatment, comprising a degassing tank, an upstream connecting pipe, a downstream connecting pipe, and at least one U-shaped horizontal well, wherein the U-shaped horizontal well comprises an upstream well, an elbow, and a downstream well connected in sequence;

[0004] The two ends of the upstream connecting pipe are respectively connected to the degassing tank and the water inlet of the upstream well, and the two ends of the downstream connecting pipe are respectively connected to the water inlet of the downstream well and the degassing tank, so that the water in the degassing tank enters the U-shaped horizontal well through the upstream connecting pipe, and after aeration and biochemical treatment in the U-shaped horizontal well, returns to the degassing tank through the downstream connecting pipe, forming a circulation loop;

[0005] An aeration device is provided in the upstream connecting pipe, and a flow-pushing device is provided in the downstream connecting pipe.

[0006] Optionally, the U-shaped horizontal well is buried underground in a horizontal form; the upstream connecting pipe and the downstream connecting pipe are both arranged at an angle to connect the degassing tank on the ground and the underground U-shaped horizontal well.

[0007] Optionally, the aeration device in the upstream connecting pipe is a first aeration pipe, and aeration holes are densely distributed on the side wall of the first aeration pipe, which is used to aerate the water input into the upstream connecting pipe;

[0008] The flow-pushing device in the downstream connecting pipe is a conventional flow-pushing device, which is used to push the water into the degassing tank.

[0009] Optionally, the elbow is a 180° elbow, so that the water in the upstream well and the downstream well flow in opposite directions.

[0010] Optionally, the upstream well and the downstream well both have an intermittent casing structure, that is, they include several cylindrical hollow inner cylinders, which are arranged in sequence along the length direction of the upstream well or the downstream well, and there is a distance between adjacent inner cylinders; the well wall of the upstream well or the downstream well is an outer cylinder, and the inner cylinder and the outer cylinder are arranged concentrically.

[0011] Further optionally, in two adjacent inner tubes, the inlet of the inner tube on the downstream side is connected to the outlet of the variable diameter guide tube; the inlet of the variable diameter guide tube is connected to the inner wall of the outer tube and corresponds to the outlet of the inner tube on the upstream side; the diameter of the inlet of the variable diameter guide tube is larger than the diameter of the outlet, so that the sewage between the inner tube on the upstream side and the inner wall of the outer tube corresponding to the inner tube is completely drained into the interior of the inner tube on the downstream side along the inner wall of the variable diameter guide tube;

[0012] The inlets of several variable-diameter guide cylinders evenly divide the outer cylinder into several outer cylinder sections.

[0013] Further optionally, at least one return water pipe is provided on the downstream side of the inner tube, which passes through the well wall of the outer tube and is then connected to the starting end (i.e., the upstream end) of the adjacent outer tube section on the downstream side, so that part of the outlet water in the inner tube on the upstream side is diverted along the return water pipe to between the inner and outer tubes on the downstream side, serving as the inlet water of the outer tube section.

[0014] Optionally, a plurality of second aeration tubes are evenly arranged on the inner wall of the outer tube and along the circumference of the outer tube, and aeration holes are densely distributed on the side walls of the second aeration tubes facing the interior of the outer tube, for aerating the water in the outer tube section;

[0015] The second aeration pipe extends along the upstream connecting pipe or the downstream connecting pipe and is then connected to the air supply device.

[0016] Optionally, a horizontal micro-oxygen liquid tube is provided at the center of the inner cylinder, and one micro-oxygen liquid tube passes through each inner cylinder of the upstream well or the downstream well, with both ends of the micro-oxygen liquid tube located at both ends of the outer cylinder; both ends of the micro-oxygen liquid tube pass through the outer cylinder and are connected to an external micro-oxygen aeration device;

[0017] The micro-oxygen liquid pipe is evenly provided with a number of hollow water outlet strips corresponding to the parts of each inner cylinder, which are used to input the wastewater after micro-oxygen aeration into the inner cylinder.

[0018] Optionally, a movable filling device is provided in the inner cylinder, the filling device comprising a guide rail and a plurality of filling parts on the guide rail, the guide rail being provided on both sides of the outer wall of the micro-oxygen liquid tube and arranged along the length direction of the micro-oxygen liquid tube;

[0019] The packing part is connected to the guide rail through a sliding block. The packing part has an arc that protrudes toward the upstream or downstream side of the inner tube, so that the packing part as a whole forms a spoon shape; the outside of the packing part is a mesh cage, and the inside is filled with carrier monomers, which can carry microorganisms and oxidize in contact with wastewater.

[0020] Further optionally, the packing part is connected to the slider via a connecting handle, the concave surface of the packing part on one side of the micro-oxygen liquid tube faces the upstream side of the wastewater, and the convex surface of the packing part on the other side of the micro-oxygen liquid tube faces the upstream side of the wastewater. The wastewater flowing through the inner tube impacts the concave surface of the spoon-shaped packing part, and pushes all the packing parts on this side to move downstream along the guide rail, thereby prompting all the packing parts on the other side to move upstream along the guide rail, thereby realizing the movement of all the packing parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the horizontal well aeration biochemical treatment device;

[0022] Figure 2 for Figure 1 A partial side view of

[0023] Figure 3 It is a schematic diagram of the interior of an upstream well or a downstream well;

[0024] Figure 4 It is a schematic cross-sectional view of an upstream well or a downstream well (the variable diameter guide tube and return pipe are omitted);

[0025] Figure 5 Schematic diagram of the micro-oxygen liquid pipe and filler device.

[0026] In the accompanying drawings, 1-degassing tank, 2-upstream connecting pipe, 3-downstream connecting pipe, 4-U-shaped horizontal well, 5-upstream well, 6-elbow, 7-downstream well, 8-inner cylinder, 9-outer cylinder, 10-variable guide cylinder, 11-outer cylinder section, 12-return pipe, 13-second aeration pipe, 14-micro-oxygen liquid pipe, 15-water outlet bar, 16-guide rail, 17-filling part, 18-slider. DETAILED DESCRIPTION

[0027] This embodiment provides a horizontal well aeration biochemical treatment device for sewage treatment, such as Figure 1-Figure 5 As shown, it includes a degassing tank 1, an upstream connecting pipe 2, a downstream connecting pipe 3 and at least one U-shaped horizontal well 4. The U-shaped horizontal well 4 includes an upstream well 5, an elbow 6 and a downstream well 7 connected in sequence;

[0028] The two ends of the upstream connecting pipe 2 are respectively connected to the degassing tank 1 and the water inlet of the upstream well 5, and the two ends of the downstream connecting pipe 3 are respectively connected to the water inlet of the downstream well 7 and the degassing tank 1, so that the water in the degassing tank 1 enters the U-shaped horizontal well 4 through the upstream connecting pipe 2, and after aeration and biochemical treatment in the U-shaped horizontal well 4, returns to the degassing tank 1 through the downstream connecting pipe 3, forming a circulation loop;

[0029] An aeration device is provided in the upstream connecting pipe 2, and a flow-pushing device is provided in the downstream connecting pipe 3.

[0030] Optionally, the U-shaped horizontal well 4 is buried in the ground in a horizontal form, which can greatly save space and has low sensitivity to the environment and climate, and is not affected by winter and summer temperatures;

[0031] The upstream connecting pipe 2 and the downstream connecting pipe 3 are both arranged at an angle, and are used to connect the above-ground degassing tank 1 and the underground U-shaped horizontal well 4 .

[0032] Optionally, the aeration device in the upstream connecting pipe 2 is a first aeration pipe, and the side wall of the first aeration pipe is densely covered with aeration holes for aerating the water input into the upstream connecting pipe 2;

[0033] The flow-pushing device in the downstream connecting pipe 3 is a conventional flow-pushing device, which is used to push water into the degassing tank 1 .

[0034] Optionally, the elbow 6 is a 180° elbow 6 , so that the water in the upstream well 5 and the downstream well 7 flow in opposite directions.

[0035] Optionally, the horizontal well aeration and biochemical treatment device can be provided with several U-shaped horizontal wells 4 connected in sequence, so that the sewage flows through each U-shaped horizontal well 4 in sequence, extending the residence time and improving the treatment effect. There are two forms of connecting several U-shaped horizontal wells 4 in sequence: first, two U-shaped horizontal wells 4 are arranged side by side, and the outlet of the downstream well 7 of the first U-shaped horizontal well 4 is connected to the inlet of the upstream well 5 of the second U-shaped horizontal well 4 through an elbow 6; second, the downstream well 7 of the first U-shaped horizontal well 4 serves as the upstream well 5 of the second U-shaped horizontal well 4. Several U-shaped horizontal wells 4 can be used as different biochemical treatment sections to implement AAO or AO treatment processes, and the aeration volume in the horizontal wells can be controlled according to the actual oxygen demand.

[0036] Optionally, the upstream well 5 and the downstream well 7 both have an intermittent casing structure, that is, they include several cylindrical hollow inner tubes 8, which are arranged in sequence along the length direction of the upstream well 5 or the downstream well 7, and there is a distance between adjacent inner tubes 8; the well wall of the upstream well 5 or the downstream well 7 is an outer tube 9, and the inner tube 8 and the outer tube 9 are concentrically arranged.

[0037] Further optionally, in two adjacent inner tubes, the inlet of the inner tube on the downstream side is connected to the outlet of the variable diameter guide tube 10; the inlet of the variable diameter guide tube 10 is connected to the inner wall of the outer tube and corresponds to the outlet of the inner tube on the upstream side; the diameter of the inlet of the variable diameter guide tube 10 is larger than the diameter of the outlet, so that the sewage between the inner tube on the upstream side and the inner wall of the outer tube 9 corresponding to the inner tube is completely drained into the interior of the inner tube on the downstream side along the inner wall of the variable diameter guide tube 10;

[0038] The inlets of the plurality of variable-diameter guide cylinders evenly divide the outer cylinder into a plurality of outer cylinder sections 11 .

[0039] Further optionally, at least one return pipe 12 is provided on the downstream side of the inner tube 8. The return pipe 12 passes through the well wall of the outer tube 9 and is then connected to the starting end (i.e., the upstream end) of the outer tube section 11 adjacent to the downstream side, so that part of the outlet water in the inner tube on the upstream side is diverted along the return pipe 12 to between the inner and outer tubes on the downstream side, serving as the inlet water of the outer tube section 11.

[0040] Optionally, a plurality of second aeration tubes 13 are evenly arranged on the inner wall of the outer cylinder 9 and along the circumference of the outer cylinder, and aeration holes are densely distributed on the side walls of the second aeration tubes 13 facing the interior of the outer cylinder 9, for aerating the water in the outer cylinder section 11;

[0041] The second aeration pipe 13 extends along the upstream connecting pipe 2 or the downstream connecting pipe 3 and is then connected to the air supply device.

[0042] Optionally, a horizontal micro-oxygen liquid tube 14 is provided at the center of the inner cylinder 8. One micro-oxygen liquid tube 14 passes through each inner cylinder of the upstream well 5 or the downstream well 7. Both ends of the micro-oxygen liquid tube 14 are located at both ends of the outer cylinder. Both ends of the micro-oxygen liquid tube 14 pass through the outer cylinder 9 and are connected to an external micro-oxygen aeration device.

[0043] A plurality of hollowed-out water outlet strips 15 are evenly arranged at the portion of the micro-oxygen liquid pipe 14 corresponding to each inner cylinder, for inputting the wastewater after micro-oxygen aeration into the inner cylinder 8 .

[0044] Further optionally, the micro-oxygen aeration device is installed on the ground and is a tank body with a micro-oxygen nano-aeration tube inside the tank body. The tank body inputs pre-treated (filtered and sanded) wastewater, which carries micro-oxygen bubbles after passing through the tank body and is input into the micro-oxygen liquid pipe 14.

[0045] In the present invention, in addition to the more traditional first aeration tube, a micro-oxygen liquid tube 14 and a second aeration tube 13 are also provided in conjunction with the inner and outer tubes of the U-shaped horizontal well 4. Wastewater in the degassing tank 1 enters the upstream well 5 of the first U-shaped horizontal well 4 through the upstream connecting tube 2 (where the first aeration is performed simultaneously). Part of the wastewater enters the inner tube and continuously flows along the sequentially arranged inner tubes for biochemical treatment; part of the wastewater enters the first outer tube section, where it undergoes aeration and oxygenation through the second aeration tube 13. This part of the wastewater then flows into the second inner tube through the variable diameter guide tube; part of the wastewater in the first inner tube flows into the second outer tube section through the return pipe 12, where it also undergoes aeration and oxygenation through the second aeration tube 13. The second aeration tube 13 observes the walls of each variable diameter guide tube on the inner wall of the outer tube. Then, the wastewater in the second outer tube section flows through the next variable diameter guide tube into the third inner tube, and the cycle continues.

[0046] The second aeration pipe 13 increases the oxygen content of the wastewater in the outer tube section, and then this part of the wastewater is input into the next inner tube, mixed with the original wastewater in the inner tube and undergoes a biochemical reaction, thereby improving the treatment efficiency; part of the effluent on the downstream side of the inner tube is input into the next inner tube for further treatment, and part enters the next outer tube section through the return pipe 12 for further aeration and oxygenation, and then is input into the next inner tube, thus achieving the purpose of continuous dynamic oxygenation of part of the wastewater and continuous oxygenation of each inner tube.

[0047] A micro-oxygen liquid pipe 14 is provided within the inner cylinder to continuously feed wastewater containing micro-oxygen bubbles from the external micro-oxygen aeration device into the inner cylinder for a third oxygenation (in-situ oxygenation). For the same upstream well 5 or downstream well 7, the micro-oxygen liquid pipe 14 can flow water from both ends, preventing insufficient oxygen downstream when only one end flows. The micro-oxygen liquid pipe 14 provides a micro-oxygen environment within the inner cylinder, facilitating biochemical reactions within the inner cylinder. Once the wastewater within the degassing tank 1 has met treatment standards, it can be discharged.

[0048] Optionally, a movable filling device is provided in the inner cylinder, and the filling device includes a guide rail 16 and a plurality of filling parts 17 on the guide rail 16. The guide rail 16 is provided on both sides of the outer wall of the micro-oxygen liquid tube 14 and is provided along the length direction of the micro-oxygen liquid tube 14.

[0049] The filler part 17 is slidably connected to the guide rail 16 through the slider 18. The filler part 17 has an arc that bulges toward the upstream or downstream side of the inner tube, so that the filler part 17 as a whole forms a spoon shape; the outer side of the filler part 17 is a mesh cage, and the inside is filled with carrier monomers, which can carry microorganisms and oxidize in contact with wastewater.

[0050] Further optionally, the packing portion 17 is connected to the slider 18 through a connecting handle, and the concave surface of the packing portion 17 on one side of the micro-oxygen liquid tube 14 faces the upstream side of the wastewater, and the convex surface of the packing portion 17 on the other side of the micro-oxygen liquid tube 14 faces the upstream side of the wastewater. The wastewater flowing through the inner tube impacts the concave surface of the spoon-shaped packing portion 17 and pushes all the packing portions 17 on this side to move downstream along the guide rail 16, thereby prompting all the packing portions 17 on the other side to move upstream along the guide rail 16, thereby realizing the movement of all the packing portions 17.

[0051] Traditional fillers are fixedly loaded in biochemical pools. The fillers near the inlet preferentially contact and treat wastewater with high pollutant concentrations, while the fillers near the outlet contact and treat wastewater with low pollutant concentrations. This results in some fillers being constantly loaded with high loads while others are constantly loaded with low loads. This is not conducive to the long-term stable operation of the biochemical pool. The fillers in traditional biochemical pools are difficult to move.

[0052] The present invention uses a U-shaped horizontal well 4 to treat wastewater. Its slender shape helps extend the residence time and improve oxygen utilization. Moreover, through ingenious design, a micro-oxygen liquid tube 14 runs through each inner tube of an upstream well 5 or downstream well 7. The packing device also runs through each inner tube. The wastewater pushes the packing part 17 on one side to move, thereby driving the movement of the packing on the other side. Because the protruding surface of the packing part 17 on the other side faces the wastewater, the resistance can be reduced. Therefore, all the packing can circulate along the micro-oxygen liquid tube 14 in the inner tube, making the processing load of the packing part 17 uniform, which is conducive to the stable operation of the U-shaped horizontal well 4. The moving packing part 17 can also play a stirring role. Specifically, the guide rails on both sides of the micro-oxygen liquid tube are connected to each other at both ends of the micro-oxygen liquid tube (i.e., the inlet and outlet), so that the guide rails on both sides form a continuous track. The obstruction of the guide rails to the water flow at the inlet and outlet is small and can be ignored. The filler part on one side of the guide rail moves from the inlet to the outlet of the micro-oxygen liquid pipe, then continues to move along the guide rail to the other side of the micro-oxygen liquid pipe, and then moves from the outlet to the inlet, and so on.

Claims

1. A horizontal well aeration biochemical treatment device for sewage treatment, characterized in that: It includes a degassing tank, an upstream connecting pipe, a downstream connecting pipe and at least one U-shaped horizontal well, wherein the U-shaped horizontal well includes an upstream well, an elbow and a downstream well connected in sequence; The two ends of the upstream connecting pipe are respectively connected to the degassing tank and the water inlet of the upstream well, and the two ends of the downstream connecting pipe are respectively connected to the water inlet of the downstream well and the degassing tank, so that the water in the degassing tank enters the U-shaped horizontal well through the upstream connecting pipe, and after aeration and biochemical treatment in the U-shaped horizontal well, returns to the degassing tank through the downstream connecting pipe, forming a circulation loop; An aeration device is provided in the upstream connecting pipe, and a flow-pushing device is provided in the downstream connecting pipe; The upstream well and the downstream well both have a discontinuous casing structure, including a plurality of cylindrical hollow inner cylinders arranged in sequence along the length direction of the upstream well or the downstream well, with spacing between adjacent inner cylinders; the well wall of the upstream well or the downstream well is an outer cylinder, and the inner cylinder and the outer cylinder are arranged concentrically; In two adjacent inner tubes, the inlet of the inner tube on the downstream side is connected to the outlet of the variable diameter guide tube; the inlet of the variable diameter guide tube is connected to the inner wall of the outer tube and corresponds to the outlet of the inner tube on the upstream side; the inlets of several variable diameter guide tubes evenly divide the outer tube into several outer tube sections; At least one return water pipe is provided on the downstream side of the inner tube. The return water pipe passes through the well wall of the outer tube and is then connected to the upstream end of the outer tube section adjacent to the downstream side, so that part of the water outlet in the inner tube on the upstream side is diverted along the return water pipe to between the inner and outer tubes on the downstream side as the water inlet of the outer tube section.

2. The horizontal well aeration biochemical treatment device for sewage treatment according to claim 1, characterized in that: The aeration device in the upstream connecting pipe is a first aeration pipe, and the side wall of the first aeration pipe is densely covered with aeration holes for aerating the water input into the upstream connecting pipe; The flow-pushing device in the downstream connecting pipe is a conventional flow-pushing device, which is used to push the water into the degassing tank.

3. The horizontal well aeration biochemical treatment device for sewage treatment according to claim 1, characterized in that: The U-shaped horizontal well is buried in the ground in a horizontal form, and the upstream connecting pipe and the downstream connecting pipe are both inclined to connect the degassing tank on the ground and the underground U-shaped horizontal well; The elbow is a 180° elbow, so that the water in the upstream well and the water in the downstream well flow in opposite directions.

4. The horizontal well aeration biochemical treatment device for sewage treatment according to claim 1, characterized in that: The diameter of the inlet of the variable diameter guide tube is larger than the diameter of the outlet, so that the sewage between the upstream inner tube and the inner wall of the outer tube corresponding to the inner tube is all drained into the interior of the downstream inner tube along the inner wall of the variable diameter guide tube.

5. The horizontal well aeration biochemical treatment device for sewage treatment according to claim 4, characterized in that: A plurality of second aeration tubes are evenly arranged on the inner wall of the outer tube and along the circumference of the outer tube, and aeration holes are densely distributed on the side walls of the second aeration tubes facing the interior of the outer tube, for aerating the water in the outer tube section; The second aeration pipe extends along the upstream connecting pipe or the downstream connecting pipe and is then connected to the air supply device.

6. The horizontal well aeration biochemical treatment device for sewage treatment according to claim 4, characterized in that: A horizontal micro-oxygen liquid pipe is provided at the center of the inner cylinder. One micro-oxygen liquid pipe runs through each inner cylinder of the upstream well or the downstream well, and both ends of the micro-oxygen liquid pipe are located at both ends of the outer cylinder. Both ends of the micro-oxygen liquid pipe pass through the outer cylinder and are connected to an external micro-oxygen aeration device. The micro-oxygen liquid pipe is evenly provided with a number of hollow water outlet strips corresponding to the parts of each inner cylinder, which are used to input the wastewater after micro-oxygen aeration into the inner cylinder.

7. The horizontal well aeration biochemical treatment device for sewage treatment according to claim 6, characterized in that: A movable filling device is provided in the inner cylinder, and the filling device includes a guide rail and a plurality of filling parts on the guide rail. The guide rail is provided on both sides of the outer wall of the micro-oxygen liquid tube and is provided along the length direction of the micro-oxygen liquid tube; The packing part is connected to the guide rail through a sliding block. The packing part has an arc that protrudes toward the upstream or downstream side of the inner tube, so that the packing part as a whole forms a spoon shape; the outside of the packing part is a mesh cage, and the inside is filled with carrier monomers, which can carry microorganisms and oxidize in contact with wastewater.

8. The horizontal well aeration biochemical treatment device for sewage treatment according to claim 7, characterized in that: The packing part is connected to the slider through a connecting handle, the concave surface of the packing part on one side of the micro-oxygen liquid tube faces the upstream side of the wastewater, and the convex surface of the packing part on the other side of the micro-oxygen liquid tube faces the upstream side of the wastewater. The wastewater flowing through the inner cylinder impacts the concave surface of the spoon-shaped packing part and pushes all the packing parts on this side to move downstream along the guide rail, thereby prompting all the packing parts on the other side to move upstream along the guide rail, thereby realizing the movement of all the packing parts.

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