Underwater maintenance free buried full-automatic sewage treatment equipment

Abstract

The utility model provides a kind of maintenance-free underwater buried full-automatic sewage treatment equipment, belong to sewage treatment technical field, including the adjusting pool, anoxic tank, aerobic tank, vertical-flow sedimentation tank and equipment room that are buried in ground surface successively and the equipment hoist hole of high ground that is set on its upper end, sewage is handled automatically by adjusting pool, anoxic tank, aerobic tank and vertical-flow sedimentation tank successively, and the sewage after being handled is discharged from the vertical-flow sedimentation tank, and part of sludge is refluxed to the anoxic tank.The utility model provides a kind of maintenance-free underwater buried full-automatic sewage treatment equipment, by setting multiple equipment hoist holes, equipment maintenance or replacement can be hoisted out through equipment hoist hole to maintain or replace, without personnel entering pool interior, avoid personnel casualties and prevent safety accidents.

Description

Technical Field

[0001] This utility model belongs to the field of sewage treatment technology, and more specifically, it relates to a fully automatic underground sewage treatment device that is maintenance-free underwater. Background Technology

[0002] Buried sewage treatment equipment offers advantages such as space saving, minimal environmental impact, and beautification of the environment, but it also presents significant drawbacks in operation and maintenance. When traditional buried sewage treatment equipment malfunctions, repairs or replacements require personnel to enter the water tank. This operation is not only high-risk but also carries the risks of hydrogen sulfide hazard and oxygen deficiency. Furthermore, it is unpredictable; while initial entry into the tank may appear safe, a sudden release of large amounts of toxic gases can easily cause acute poisoning. The water tanks of buried sewage treatment equipment are permanently enclosed, with a limited number of access ports and poor natural ventilation. Therefore, repairs and replacements must adhere to confined space safety management requirements, require personnel to undergo confined space operation safety training, and ensure adequate emergency rescue capabilities. Failure to do so can easily lead to accidents and injuries.

[0003] Therefore, it is necessary to propose a maintenance-free underground sewage treatment equipment that avoids personnel entering the water tank during maintenance or equipment replacement, thereby preventing safety accidents. Utility Model Content

[0004] The purpose of this utility model is to provide a fully automatic underground sewage treatment equipment that does not require underwater maintenance, in order to solve the technical problem that existing underground sewage treatment equipment requires operators to enter the water tank during maintenance, which is prone to safety accidents.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A fully automatic underground sewage treatment device that requires no underwater maintenance is provided. It includes an equalization tank, an anoxic tank, an aerobic tank, a vertical flow sedimentation tank, and an equipment room, all sequentially and isolated from each other beneath the ground surface. Each of the equalization tank, anoxic tank, aerobic tank, vertical flow sedimentation tank, and equipment room has a hoisting hole at its upper end, extending above ground level. Equipment inside the equalization tank, anoxic tank, aerobic tank, vertical flow sedimentation tank, and equipment room can be hoisted out through the hoisting hole for maintenance and replacement. Sewage is automatically treated sequentially through the equalization tank, anoxic tank, aerobic tank, and vertical flow sedimentation tank. After treatment, the sewage is discharged from the vertical flow sedimentation tank, and some sludge is returned to the anoxic tank.

[0006] In one possible implementation, an inlet pipe is connected to one side of the equalization tank, through which sewage flows into the equalization tank. The equalization tank is equipped with a level gauge, a submersible mixer, and a lift pump. The submersible mixer is used to mix the sewage. The outlet of the lift pump is connected to a lift pipe, the outlet of which is located inside the anoxic tank. The lift pump is used to deliver sewage into the anoxic tank. The level gauge monitors the sewage level inside the equalization tank and is electrically connected to the lift pump. The lift pump is used to start and stop based on the sewage level. During maintenance, the submersible mixer and the lift pump are lifted out through the equipment hoisting hole located at the upper end of the equalization tank.

[0007] In one possible implementation, the lift pipe is equipped with a lift pipe electric valve and a lift pipe flow meter near its outlet end. The lift pipe electric valve is used to control the on / off state of the lift pipe, and the lift pipe flow meter is used to monitor the water flow rate inside the lift pipe. The lift pipe flow meter is electrically connected to the regulating tank lift pump, and the regulating tank lift pump is used to adjust its lift volume according to the water flow rate monitored by the lift pipe flow meter.

[0008] In one possible implementation, the anoxic tank is equipped with a submersible mixer. Wastewater from the equalization tank flows into the anoxic tank. The aerobic tank is connected to the anoxic tank via a nitrification liquid return pipe. The nitrified liquid from the aerobic tank flows into the anoxic tank through the nitrification liquid return pipe. The vertical flow sedimentation tank is connected to the anoxic tank via a sludge return pipe. The sludge returned after sedimentation in the vertical flow sedimentation tank flows into the anoxic tank through the sludge return pipe. The submersible mixer is used to mix the mud and water. The anoxic tank is used for wastewater denitrification treatment. When the submersible mixer is under maintenance, it is lifted out through the equipment lifting hole located at the upper end of the anoxic tank.

[0009] In one possible implementation, an opening connects the anoxic tank and the aerobic tank, through which wastewater from the anoxic tank flows into the aerobic tank. The aerobic tank is equipped with a dissolved oxygen meter, a nitrification liquor return pump, and a liftable aeration system. The outlet of the nitrification liquor return pump is connected to one end of a nitrification liquor return pipe. Nitrified liquor from the aerobic tank is transported to the anoxic tank through the nitrification liquor return pipe. The nitrification liquor return pipe is equipped with a nitrification liquor return pipe electric valve and a nitrification liquor return pipe flow meter. The electric valve is used to control the flow rate of the nitrification liquor return pipe. The nitrification liquid return pipe is switched on and off, and the nitrification liquid return pipe flow meter is used to monitor the nitrification liquid return flow rate. The nitrification liquid return pipe electric valve, the nitrification liquid return pipe flow meter, and the lift water pipe flow meter are electrically connected and linked. The opening of the nitrification liquid return pipe electric valve is adjusted by the lift water pipe flow meter to achieve proportional changes in the nitrification liquid return flow rate and the lift water volume, and to control the nitrification liquid return flow rate. The aerobic tank is used for wastewater denitrification treatment. When the nitrification liquid return pump and the liftable aeration system are under maintenance, they are lifted out through the equipment lifting hole located at the upper end of the aerobic tank.

[0010] In one possible implementation, the liftable aeration system includes a conversion flange, a movable air riser, a riser support, a hose connector, an aeration hose, an open-type fixed sleeve, a fixed support, a movable rope, and a hook. The conversion flange is located near the equipment hoisting hole at the upper end of the aerobic tank, and one end is used to connect to the air outlet of a blower. The blower is electrically connected to and linked with the dissolved oxygen meter, and the blower is frequency-controlled according to the value measured by the dissolved oxygen meter. The movable air riser is vertically arranged, with its upper end connected to the other end of the conversion flange, and its lower end connected to one end of the hose connector. The riser support is used to limit the movable air riser, and the aeration hose is inserted into the open-type fixed sleeve. One end is connected to the other end of the hose connector. The side wall of the perforated fixed sleeve is provided with multiple holes. The fixed support is used to limit the perforated fixed sleeve. One end of the movable rope is connected to the other end of the aeration hose. The other end of the movable rope passes through the equipment hoisting hole located at the upper end of the aerobic tank and is connected to the hook. When the liftable aeration system is being maintained, the equipment hoisting hole is opened and the conversion flange is removed. The movable rope is loosened and the movable air riser, the hose connector, and the aeration hose are lifted. The movable air riser and the hose connector pass through the riser support and are lifted to the ground. The aeration hose and the movable rope pass through the perforated fixed sleeve and the riser support in sequence, so that the aeration hose is lifted to the ground for maintenance or replacement.

[0011] In one possible implementation, the aerobic tank and the vertical flow sedimentation tank are connected by a sedimentation tank inlet pipe. The vertical flow sedimentation tank is connected to an outlet pipe for external discharge on the side near the equipment room. The vertical flow sedimentation tank is equipped with a liftable central cylinder, a sludge hopper, an effluent weir, and a collection trough. The sludge hopper is located at the bottom of the vertical flow sedimentation tank, and the liftable central cylinder is located above the sludge hopper and below the equipment lifting hole. The sludge-water mixture treated in the aerobic tank flows into the vertical flow sedimentation tank through the sedimentation tank inlet pipe and undergoes sludge-water separation inside the vertical flow sedimentation tank. The bottom of the collection trough is connected to one end of the outlet pipe, and the effluent weir is connected to the upper end of the collection trough. The supernatant in the vertical flow sedimentation tank flows into the collection trough through the effluent weir and is then discharged through the outlet pipe after meeting the standards. The activated sludge settles and accumulates at the bottom of the sludge hopper. The liftable central cylinder is lifted out through the equipment lifting hole located at the upper end of the vertical flow sedimentation tank during maintenance.

[0012] In one possible implementation, the equipment room is equipped with a sludge pump and the blower. The suction end of the sludge pump is connected to a sludge discharge pipe of the sedimentation tank. The suction end of the sludge discharge pipe is located inside the vertical flow sedimentation tank and connected to the sludge hopper. The discharge end of the sludge pump is connected to one end of the return sludge pipe. The middle part of the return sludge pipe is connected to one end of the residual sludge pipe. One end of the residual sludge pipe extends out of the equipment room and is used for external sludge discharge. The sludge pump is used to suck up sludge located inside the sludge hopper and flow it into the anoxic tank through the return sludge pipe or discharge it externally through the residual sludge pipe. The air outlet of the blower is connected to one end of an air pipe. The other end of the air pipe is detachably connected to one end of the conversion flange. After the blower blows air, the gas passes sequentially through the air pipe, the conversion flange, the movable air riser, the hose connector, and the aeration hose, and is discharged from the aeration hose.

[0013] In one possible implementation, the return sludge pipe is equipped with a return sludge pipe electric valve and a return sludge pipe flow meter. The return sludge pipe electric valve, the return sludge pipe flow meter, and the lift water pipe flow meter are electrically connected and linked. The return sludge pipe flow meter is used to monitor the sludge return flow rate inside the return sludge pipe. The return sludge pipe electric valve adjusts its opening degree according to the lift water pipe flow meter, thereby achieving a proportional change between the activated sludge return flow rate and the influent flow rate to control the activated sludge return flow rate.

[0014] In one possible implementation, the residual sludge pipe is equipped with a residual sludge pipe electric valve and a residual sludge pipe flow meter. The residual sludge pipe flow meter is used to monitor the sludge flow rate inside the residual sludge pipe. The residual sludge pipe electric valve, the lift water pipe flow meter, and the residual sludge pipe flow meter are electrically connected and linked. The residual sludge pipe electric valve adjusts its opening degree according to the lift water pipe flow meter, thereby achieving a proportional change between the residual sludge discharge and the influent flow rate to control the residual sludge discharge.

[0015] The beneficial effects of this utility model's maintenance-free underground fully automatic sewage treatment equipment are as follows: Compared with the prior art, this utility model's maintenance-free underground fully automatic sewage treatment equipment includes a regulating tank, an anoxic tank, an aerobic tank, a vertical flow sedimentation tank, and an equipment room, all buried underground, with equipment hoisting holes extending above the ground at the top. Sewage is automatically treated sequentially through the regulating tank, anoxic tank, aerobic tank, and vertical flow sedimentation tank. The treated sewage is discharged from the vertical flow sedimentation tank, and some sludge is returned to the anoxic tank. This utility model's maintenance-free underground fully automatic sewage treatment equipment, buried underground, does not occupy surface space, making it suitable for areas with limited land. Underground installation reduces the impact of noise and odor on the surrounding environment, while the ground above the equipment can be landscaped, beautifying the environment. With multiple equipment hoisting holes, the equipment can be lifted out for repair or replacement without personnel entering the tank, avoiding injury and preventing accidents. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A structural schematic diagram of a maintenance-free, underground fully automatic sewage treatment device provided for an embodiment of this utility model;

[0018] Figure 2 A schematic diagram of the regulating tank structure of a maintenance-free underground fully automatic sewage treatment equipment provided for an embodiment of this utility model;

[0019] Figure 3 A schematic diagram of the anoxic tank structure of a maintenance-free underground fully automatic sewage treatment device provided for an embodiment of this utility model;

[0020] Figure 4A schematic diagram of the aerobic tank structure of a maintenance-free underground fully automatic sewage treatment equipment provided for an embodiment of this utility model;

[0021] Figure 5 A schematic diagram of a vertical flow sedimentation tank structure for a maintenance-free underground fully automatic sewage treatment device provided in this utility model embodiment;

[0022] Figure 6 This is a schematic diagram of the equipment room structure of a fully automatic underground sewage treatment equipment that requires no underwater maintenance, as provided in an embodiment of this utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Equalization tank; 11. Inlet pipe; 12. Level gauge; 13. Submersible mixer for equalization tank; 14. Booster pump for equalization tank; 15. Booster pipe; 16. Electric valve for booster pipe; 17. Flow meter for booster pipe;

[0025] 2. Anoxic tank; 21. Submersible mixer for anoxic tank; 22. Nitrification liquid return pipe; 23. Return sludge pipe; 24. Electric valve for return sludge pipe; 25. Flow meter for return sludge pipe;

[0026] 3. Aerobic tank; 31. Dissolved oxygen meter; 32. Nitrification liquid return pump; 33. Liftable aeration system; 331. Converter flange; 332. Movable air riser; 333. Riser support; 334. Hose connector; 335. Aeration hose; 336. Perforated fixing sleeve; 337. Fixing support; 338. Movable rope; 339. Hook; 34. Nitrification liquid return pipe electric valve; 35. Nitrification liquid return pipe flow meter;

[0027] 4. Vertical flow sedimentation tank; 41. Sedimentation tank inlet pipe; 42. Outlet pipe; 43. Liftable central cylinder; 44. Sludge hopper; 45. Outlet weir; 46. Water collection trough;

[0028] 5. Equipment room; 51. Blower; 52. Sludge pump; 53. Sedimentation tank sludge discharge pipe; 54. Excess sludge pipe; 55. Air pipe; 56. Excess sludge pipe electric valve; 57. Excess sludge pipe flow meter;

[0029] 6. Equipment hoisting hole; 7. Equipment hoisting device; 8. Opening; 9. Ladder. Detailed Implementation

[0030] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0031] Please refer to the following: Figures 1 to 6 This invention provides a fully automatic underground sewage treatment device that requires no underwater maintenance. The device comprises, in sequence, an equalization tank 1, an anoxic tank 2, an aerobic tank 3, a vertical flow sedimentation tank 4, and an equipment room 5, all arranged underground and isolated from each other. Each of the equalization tank 1, anoxic tank 2, aerobic tank 3, vertical flow sedimentation tank 4, and equipment room 5 has a hoisting hole 6 extending above ground level at its upper end. Equipment inside these tanks can be hoisted out through the hoisting holes 6 for maintenance and replacement. Sewage is automatically treated sequentially through the equalization tank 1, anoxic tank 2, aerobic tank 3, and vertical flow sedimentation tank 4. After treatment, the sewage is discharged from the vertical flow sedimentation tank 4, while some sludge is returned to the anoxic tank 2.

[0032] This utility model provides a maintenance-free, underground, fully automatic sewage treatment device. Compared with existing technologies, it includes an equalization tank 1, an anoxic tank 2, an aerobic tank 3, a vertical flow sedimentation tank 4, and an equipment room 5, all buried underground, with equipment lifting holes 6 extending above ground level. Sewage is automatically treated sequentially through the equalization tank 1, anoxic tank 2, aerobic tank 3, and vertical flow sedimentation tank 4. The treated sewage is discharged from the vertical flow sedimentation tank 4, and some sludge is returned to the anoxic tank 2 to participate in sewage treatment. This maintenance-free, underground, fully automatic sewage treatment device does not occupy surface space, making it suitable for areas with limited land. Underground installation reduces the impact of noise and odor on the surrounding environment, while the ground above the equipment can be landscaped, beautifying the environment. With multiple equipment lifting holes 6, the equipment can be lifted out for repair or replacement without personnel entering the tanks, avoiding injury and preventing accidents.

[0033] Specifically, in this embodiment, a hoisting hole 6 is provided at the upper end of the equalization tank 1 on the side away from the anoxic tank 2. A hoisting hole 6 is also provided at the upper end of the junction of the equalization tank 1 and the anoxic tank 2. Hoisting holes 6 are provided on the upper ends of opposite sides of the aerobic tank 3. A hoisting hole 6 is provided at the upper end of the middle section of the vertical flow sedimentation tank 4. A hoisting hole 6 is also provided at the upper end of the equipment room 5, for a total of six hoisting holes 6. A cover is provided at the upper end of each hoisting hole 6 to seal it. When maintenance is required, the cover must be opened first, and then the equipment to be repaired can be lifted and transported to the ground for repair or replacement. Each piece of equipment in this application is connected to a hoisting rope, the upper end of which extends from and is fixed to the hoisting hole 6. After opening the cover, the equipment can be hoisted by pulling the hoisting rope. The cover will press down the lifting rope, but it will not affect the obstruction of the equipment lifting hole 6. The purpose of setting the cover is to prevent personnel or equipment from accidentally entering the pool. The cover is similar to the function of manhole covers on roads in our daily lives.

[0034] This utility model adopts a "regulation + anoxic + aerobic + sedimentation" sewage treatment process, integrating various tanks and equipment rooms into a single underground integrated device.

[0035] In some embodiments, please refer to Figures 1 to 6 One side of the equalization tank 1 is connected to an inlet pipe 11, through which sewage flows into the equalization tank 1. Inside the equalization tank 1 are a level gauge 12, a submersible mixer 13, and a lift pump 14. The submersible mixer 13 is used to mix the sewage. The outlet of the lift pump 14 is connected to a lift pipe 15, the outlet of which is located inside the anoxic tank 2. The lift pump 14 is used to pump sewage into the anoxic tank 2. The level gauge 12 monitors the sewage level inside the equalization tank 1 and is electrically connected to the lift pump 14, which starts and stops based on the sewage level. During maintenance, the submersible mixer 13 and the lift pump 14 are lifted out through the equipment hoisting hole 6 located at the top of the equalization tank 1. Sewage flows into the equalization tank 1 through the inlet pipe 11, where the submersible mixer 13 mixes the sewage evenly, adjusting the unevenness of the water volume and making the water quality more balanced, thus ensuring more stable operation of subsequent treatment units (such as the anoxic tank 2). When the submersible mixer 13 in the equalization tank needs inspection, maintenance, or upkeep, it can be lifted from the tank body through the equipment hoisting device 7 and ropes to the ground for inspection and maintenance. The equalization tank lift pump 14 starts when the liquid level is high and stops when the liquid level is low.

[0036] In some embodiments, please refer to Figures 1 to 6A lifting pipe electric valve 16 and a lifting pipe flow meter 17 are installed near the outlet end of the lifting pipe 15. The lifting pipe electric valve 16 is used to control the on / off state of the lifting pipe 15, and the lifting pipe flow meter 17 is used to monitor the water flow inside the lifting pipe 15. The lifting pipe flow meter 17 is electrically connected to the regulating tank lifting pump 14, which adjusts its lifting water volume according to the water flow monitored by the lifting pipe flow meter 17. When the regulating tank lifting pump 14 needs to be inspected, maintained, or repaired, it can be inserted into the tank body using the equipment hoisting device 7 or a hoisting rope and lifted out of the tank body to the ground for maintenance. After maintenance is completed, it can be hoisted back into the tank body. The equipment hoisting hole 6 can be closed after the equipment hoisting device 7 leaves the equipment hoisting hole 6. Under normal circumstances, the equipment hoisting hole 6 is closed, and it is only necessary to open the equipment hoisting hole 6 when some equipment needs to be inspected or maintained.

[0037] In some embodiments, please refer to Figures 1 to 6 Anoxic tank 2 is equipped with an anoxic tank submersible mixer 21. Wastewater from equalization tank 1 flows into anoxic tank 2. Aerobic tank 3 is connected to anoxic tank 2 by a nitrification liquid return pipe 22. The nitrification liquid in aerobic tank 3 flows into anoxic tank 2 through the nitrification liquid return pipe 22. Vertical flow sedimentation tank 4 is connected to anoxic tank 2 by a sludge return pipe 23. The sludge returned after sedimentation in vertical flow sedimentation tank 4 flows into anoxic tank 2 through the sludge return pipe 23. The anoxic tank submersible mixer 21 is used to mix mud and water. Anoxic tank 2 is used for wastewater denitrification treatment. When anoxic tank submersible mixer 21 is under maintenance, it is lifted out through the equipment lifting hole 6 located at the upper end of anoxic tank 2. In the vertical flow sedimentation tank 4, a portion of the sludge is returned to the anoxic tank 2 via the sludge return pipe 23, while the nitrified liquid in the aerobic tank 3 flows to the anoxic tank 2 via the nitrified liquid return pipe 22. Inside the anoxic tank 2, the sludge is mixed evenly by the submersible mixer 21. Through the action of facultative anaerobic denitrifying bacteria, organic pollutants in the water are used as organic carbon sources to reduce nitrates and nitrites from the mixed liquid in the aerobic tank 3 into nitrogen gas, which is then released into the atmosphere, thus achieving the purpose of denitrification.

[0038] The equalization tank lift pump 14 and the anoxic tank submersible mixer 21 share a common equipment hoisting hole 6. When it is necessary to inspect or maintain the anoxic tank submersible mixer 21, it can be hoisted away from the anoxic tank 2.

[0039] In some embodiments, please refer to Figures 1 to 6An opening 8 connects the anoxic tank 2 and the aerobic tank 3. Wastewater from the anoxic tank 2 flows into the aerobic tank 3 through the opening 8. The aerobic tank 3 is equipped with a dissolved oxygen meter 31, a nitrification liquid return pump 32, and a liftable aeration system 33. The outlet of the nitrification liquid return pump 32 is connected to one end of the nitrification liquid return pipe 22. The nitrified liquid in the aerobic tank 3 is transported to the anoxic tank 2 through the nitrification liquid return pipe 22. The nitrification liquid return pipe 22 is equipped with a nitrification liquid return pipe electric valve 34 and a nitrification liquid return pipe flow meter 35. The nitrification liquid return pipe electric valve 34 is used to control the nitrification liquid return. Pipe 22 is switched on and off. The nitrification liquid return pipe flow meter 35 is used to monitor the nitrification liquid return flow rate. The nitrification liquid return pipe electric valve 34, the nitrification liquid return pipe flow meter 35, and the lift water pipe flow meter 17 are electrically connected and linked. The opening of the nitrification liquid return pipe electric valve 34 is adjusted by the lift water pipe flow meter 17 to achieve proportional changes in the nitrification liquid return flow rate and the lift water volume, and to control the nitrification liquid return flow rate. The aerobic tank 3 is used for wastewater denitrification treatment. When the nitrification liquid return pump 32 and the liftable aeration system 33 are under maintenance, they are lifted out through the equipment lifting hole 6 located at the upper end of the aerobic tank 3. The nitrification liquid return pump 32 transports the nitrification liquid into the anoxic tank 2. The mixture inside the anoxic tank 2 can flow into the aerobic tank 3 by gravity. When the nitrification liquid return pump 32 needs maintenance, it can be lifted out of the tank body through the equipment lifting hole 6 on the right side of the aerobic tank 3. The liftable aeration system 33 is lifted out through another equipment lifting hole 6. The function of aerobic tank 3 is to digest and degrade organic pollutants in wastewater through the aerobic respiration of aerobic microorganisms. At the same time, the digestive bacteria reduce ammonia nitrogen to nitrate under aerobic conditions, thereby achieving the digestion of ammonia nitrogen. The nitrified liquid is then returned to anoxic tank 2, ultimately achieving the purpose of denitrification.

[0040] In some embodiments, please refer to Figures 1 to 6The aeration system 33 includes a conversion flange 331, a movable air riser 332, a riser support 333, a hose connector 334, an aeration hose 335, an open-type fixed sleeve 336, a fixed support 337, a movable rope 338, and a hook 339. The conversion flange 331 is located near the equipment hoisting hole 6 at the upper end of the aerobic tank 3, and one end is used to connect to the air outlet of the blower 51. The blower 51 is electrically connected to and linked with the dissolved oxygen meter 31. The blower 51 adjusts its frequency according to the value measured by the dissolved oxygen meter 31. The movable air riser 332 is vertically arranged and its upper end is connected to the other end of the conversion flange 331. The lower end of the movable air riser 332 is connected to one end of the hose connector 334. The riser support 333 is used to limit the movable air riser 332. The aeration hose 335 is inserted into the open-type fixed sleeve 336. The aeration system 33 is equipped with multiple holes on its side walls, with one end connected to the other end of the hose connector 334. The fixed sleeve 336 is used to limit the opening of the fixed sleeve 336. One end of the movable rope 338 is connected to the other end of the aeration hose 335, and the other end of the movable rope 338 passes through the equipment lifting hole 6 at the upper end of the aerobic tank 3 and is connected to the hook 339. When the aeration system 33 is being maintained, the equipment lifting hole 6 is opened and the conversion flange 331 is removed. The movable rope 338 is loosened and the movable air riser 332, hose connector 334 and aeration hose 335 are lifted. The movable air riser 332 and hose connector 334 pass through the riser support 333 and are lifted to the ground. The aeration hose 335 and the movable rope 338 pass through the opening of the fixed sleeve 336 and the riser support 333 in sequence, so that the aeration hose 335 is lifted to the ground for maintenance or replacement. After maintenance or replacement, pulling the movable rope 338 causes the aeration hose 335 to pass sequentially through the riser support 333 and the perforated fixing sleeve 336. Pulling the rope 338 to the right side of the perforated fixing sleeve 336 stops the pull, and simultaneously, the movable air riser 332 passes into the riser support 333. By pulling the movable rope 338, the movable air riser 332 and the aeration hose 335 can be reset to their original positions, achieving installation and disassembly without requiring personnel to enter the tank, preventing safety accidents. In this embodiment, the conversion flange 331 is a connector, allowing for flexible installation and disassembly. The movable air riser 332 is a pipe that allows airflow. One end of the hose connector 334 connects to the lower end of the movable air riser 332, and the other end connects to one end of the aeration hose 335. The other end of the aeration hose 335 is closed and connected to the lower end of the movable rope 338. The hook 339 is located below the equipment hoisting hole 6, which facilitates the attachment and winding of the extra length of the movable rope 338 onto the hook 339.

[0041] The riser support 333 is equivalent to a clamp, fixed to the inner wall of the aerobic tank 3, allowing the movable air riser 332 to have the freedom of movement along its axis (i.e., vertical). Similarly, the aeration hose 335 also has the freedom of movement along its axis inside the perforated fixed sleeve 336, so that the aeration hose 335 can move inside the perforated fixed sleeve 336 and also inside the riser support 333 (the outer diameter of the aeration hose 335 is smaller than the inner diameter of the riser support 333). This makes it easy to lift the aeration hose 335 to the ground for maintenance and replacement.

[0042] Specifically, the blower 51 is a type of blower that, upon startup, blows or vents air. Air flows sequentially through the conversion flange 331, the movable air riser 332, the hose connector 334, and the aeration hose 335, thus facilitating aeration. The gas discharged from the aeration hose 335 exits through holes in the perforated fixed sleeve 336, allowing aeration to occur within the aerobic tank 3. The frequency conversion regulation of the blower 51 prevents over-aeration, saving on electricity and other operating costs.

[0043] In some embodiments, please refer to Figures 1 to 6 A sedimentation tank inlet pipe 41 connects the aerobic tank 3 and the vertical flow sedimentation tank 4. An outlet pipe 42 for external discharge is connected to the side of the vertical flow sedimentation tank 4 closest to the equipment room 5. The vertical flow sedimentation tank 4 is equipped with a liftable central cylinder 43, a sludge hopper 44, an effluent weir 45, and a collection trough 46. The sludge hopper 44 is located at the bottom of the vertical flow sedimentation tank 4, and the liftable central cylinder 43 is located above the sludge hopper 44 and below the equipment hoisting hole 6. The sludge-water mixture treated in the aerobic tank 3 is discharged through... The inlet pipe 41 of the sedimentation tank flows into the vertical flow sedimentation tank 4, where mud and water are separated. The bottom of the collection trough 46 is connected to one end of the outlet pipe 42, and the outlet weir 45 is connected to the upper end of the collection trough 46. The supernatant in the vertical flow sedimentation tank 4 flows into the collection trough 46 through the outlet weir 45 and is then discharged through the outlet pipe 42 after meeting standards. Activated sludge settles and accumulates at the bottom of the sludge hopper 44. The liftable central cylinder 43 can be lifted out through the equipment lifting hole 6 located at the upper end of the vertical flow sedimentation tank 4 for maintenance. The mixture in the aerobic tank 3 flows into the vertical flow sedimentation tank 4 through the inlet pipe 41 of the sedimentation tank. The mud and water mixture undergoes mud-water separation in the vertical flow sedimentation tank 4. The outlet weir 45 is located at the upper end of the collection trough 46, and the supernatant above the outlet weir 45 flows into the collection trough 46 and is finally discharged through the outlet pipe 42. Activated sludge settles and accumulates at the bottom of the sludge hopper 44. The liftable central cylinder 43 achieves mud-water separation and sedimentation. The outlet end of the sedimentation tank inlet pipe 41 is connected to the interior of the liftable central cylinder 43, which serves as a medium for mud-water separation and sedimentation. The structure of the vertical flow sedimentation tank 4 can refer to existing technologies.

[0044] In some embodiments, please refer to Figures 1 to 6The equipment room 5 is equipped with a sludge pump 52 and a blower 51. The suction end of the sludge pump 52 is connected to a sedimentation tank sludge discharge pipe 53. The suction end of the sedimentation tank sludge discharge pipe 53 is located inside the vertical flow sedimentation tank 4 and connected to a sludge hopper 44. The discharge end of the sludge pump 52 is connected to one end of a return sludge pipe 23. The middle of the return sludge pipe 23 is connected to one end of a residual sludge pipe 54. One end of the residual sludge pipe 54 extends out of the equipment room 5 and is used for external sludge discharge. The sludge pump 52 is used to pump sludge from the equipment room 5. Sludge inside sludge hopper 44 flows into anoxic tank 2 through return sludge pipe 23 or is discharged through excess sludge pipe 54. One end of blower 51 is connected to air pipe 55, and the other end of air pipe 55 is detachably connected to conversion flange 331. After blown by blower 51, the gas flows sequentially through air pipe 55, conversion flange 331, movable air riser 332, hose connector 334, and aeration hose 335, and is discharged from aeration hose 335. After sludge pump 52 operates, it discharges sludge from sludge hopper 44. Part of the activated sludge flows into anoxic tank 2 through return sludge pipe 23, and the other part is discharged through excess sludge pipe 54. When hoisting aeration hose 335, the air pipe 55 and conversion flange 331 are disconnected. At this time, air pipe 55 does not need to be moved; operation can be carried out after opening equipment hoisting hole 6, without requiring personnel to enter the tank. The blower provides oxygen for the growth of microorganisms in the aerobic tank 3. It is linked to the dissolved oxygen meter 31 inside the aerobic tank 3 for control. The blower is frequency-adjusted according to the value measured by the dissolved oxygen meter 31, so that the blower can operate at the highest efficiency, reducing unnecessary power consumption, achieving precise aeration, and maintaining the dissolved oxygen in the aerobic tank 3 at the optimal oxygen content for microorganisms.

[0045] Preferably, a ladder 9 is also installed in the equipment room 5, allowing personnel to enter and exit the equipment room 5 from the ground. The upper end of the ladder 9 extends below the equipment hoisting hole 6, allowing personnel to enter the equipment room 5 after opening the equipment hoisting hole 6. When the sludge pump 52 and the blower 51 require inspection, maintenance, or repair, necessary ventilation and testing must be performed before entering the equipment room 5 for operation. The equipment room 5 is kept in a dry state.

[0046] In some embodiments, please refer to Figures 1 to 6The return sludge pipe 23 is equipped with a return sludge pipe electric valve 24 and a return sludge pipe flow meter 25. The return sludge pipe electric valve 24 and the return sludge pipe flow meter 25 are electrically connected to and linked with the lift water pipe flow meter 17. The return sludge pipe flow meter 25 is used to monitor the sludge return flow rate inside the return sludge pipe 23. The return sludge pipe electric valve 24 adjusts its opening according to the lift water pipe flow meter 17, thereby realizing the proportional change between the activated sludge return flow rate and the influent flow rate, so as to control the activated sludge return flow rate. The waste sludge pipe 54 is equipped with a waste sludge pipe electric valve 56 and a waste sludge pipe flow meter 57. The waste sludge pipe flow meter 57 is used to monitor the sludge flow rate inside the waste sludge pipe 54. The waste sludge pipe electric valve 56, the lift water pipe flow meter 17, and the waste sludge pipe flow meter 57 are electrically connected and linked. The waste sludge pipe electric valve 56 adjusts its opening according to the lift water pipe flow meter 17, thereby achieving a proportional change in the waste sludge discharge rate and the influent flow rate to control the waste sludge discharge rate. The influent flow rate, nitrification liquor return flow rate, sludge return flow rate, and sludge discharge rate can be linked and adjusted to accurately control the nitrification liquor return flow rate, sludge return flow rate, and sludge discharge rate. Through real-time monitoring and interlocking control of the influent flow rate, the equipment's resistance to shock loads is improved, it can cope with water flow fluctuations, and it can achieve fully automated control of the entire process.

[0047] This application incorporates multiple equipment hoisting holes 6, allowing the equipment (submersible mixer 13 in the equalization tank, lift pump 14 in the equalization tank, submersible mixer 21 in the anoxic tank, liftable aeration system 33, nitrification liquid return pump 32, and liftable central cylinder 43) to be hoisted away from the tank body. This facilitates inspection, maintenance, and upkeep, eliminating the need for maintenance personnel to enter the underground sewage treatment equipment's tank, thus preventing safety accidents such as oxygen deficiency, suffocation, and poisoning. The equipment is constructed from integrated steel profiles, requiring minimal floor space and allowing for rapid processing. The number of equipment units can be adjusted according to changes in the treated water volume, enabling modular application. Fully automated operation reduces the workload of operators, achieving efficient and energy-saving operation. Furthermore, the inclusion of a series of liftable or hoistable components eliminates the need for maintenance inside the tank, removing this hazard and effectively preventing safety accidents.

[0048] This utility model is equipped with a control valve system, including the above-mentioned electric valves, flow meters, etc., and also includes a detection instrument system, including a dissolved oxygen meter 31, a level gauge 12, etc. It is connected in conjunction with the equalization tank 1, the anoxic tank 2, the aerobic tank 3 and the vertical flow sedimentation tank 4 to achieve linkage control and realize the automated treatment of sewage.

[0049] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fully automatic underground sewage treatment device that requires no underwater maintenance, characterized in that, The system includes an equalization tank, an anoxic tank, an aerobic tank, a vertical flow sedimentation tank, and an equipment room, all sequentially and isolated from each other below ground level. Each of the equalization tank, anoxic tank, aerobic tank, vertical flow sedimentation tank, and equipment room has a hoisting hole at its upper end that extends above ground level. Equipment inside these tanks can be hoisted out through these hoisting holes for maintenance and replacement. Wastewater undergoes automated treatment sequentially through the equalization tank, anoxic tank, aerobic tank, and vertical flow sedimentation tank. After treatment, the wastewater is discharged from the vertical flow sedimentation tank, and some sludge is returned to the anoxic tank.

2. The underground fully automatic sewage treatment equipment requiring no underwater maintenance as described in claim 1, characterized in that, The equalization tank is connected to an inlet pipe on one side, through which sewage flows into the equalization tank. Inside the equalization tank are a level gauge, a submersible mixer, and a lift pump. The submersible mixer is used to mix the sewage. The outlet of the lift pump is connected to a lift pipe, the outlet of which is located inside the anoxic tank. The lift pump is used to pump sewage into the anoxic tank. The level gauge monitors the sewage level inside the equalization tank and is electrically connected to the lift pump. The lift pump is used to start and stop based on the sewage level. During maintenance, the submersible mixer and lift pump are lifted out through the equipment hoisting hole located at the top of the equalization tank.

3. The underground fully automatic sewage treatment equipment requiring no underwater maintenance as described in claim 2, characterized in that, The lifting water pipe is equipped with a lifting water pipe electric valve and a lifting water pipe flow meter near its outlet end. The lifting water pipe electric valve is used to control the opening and closing of the lifting water pipe, and the lifting water pipe flow meter is used to monitor the water flow inside the lifting water pipe. The lifting water pipe flow meter is electrically connected to the regulating tank lifting pump, and the regulating tank lifting pump is used to adjust its lifting water volume according to the water flow monitored by the lifting water pipe flow meter.

4. The underground fully automatic sewage treatment equipment requiring no underwater maintenance as described in claim 3, characterized in that, The anoxic tank is equipped with a submersible mixer. Wastewater from the equalization tank flows into the anoxic tank. The aerobic tank is connected to the anoxic tank by a nitrification liquid return pipe. The nitrification liquid from the aerobic tank flows into the anoxic tank through the nitrification liquid return pipe. The vertical flow sedimentation tank is connected to the anoxic tank by a sludge return pipe. The sludge returned after sedimentation in the vertical flow sedimentation tank flows into the anoxic tank through the sludge return pipe. The submersible mixer is used to mix the mud and water. The anoxic tank is used for wastewater denitrification treatment. When the submersible mixer is under maintenance, it is lifted out through the equipment lifting hole located at the upper end of the anoxic tank.

5. The underground fully automatic sewage treatment equipment requiring no underwater maintenance as described in claim 4, characterized in that, An opening connects the anoxic tank and the aerobic tank, allowing wastewater from the anoxic tank to flow into the aerobic tank. The aerobic tank is equipped with a dissolved oxygen meter, a nitrification liquor return pump, and a liftable aeration system. The outlet of the nitrification liquor return pump is connected to one end of a nitrification liquor return pipe. Nitrified liquor from the aerobic tank is transported to the anoxic tank through the nitrification liquor return pipe. The nitrification liquor return pipe is equipped with an electric valve and a flow meter. The electric valve controls the flow of the nitrification liquor return pipe. The flow meter of the nitrification liquid return pipe is used to monitor the nitrification liquid return flow rate. The electric valve of the nitrification liquid return pipe, the flow meter of the nitrification liquid return pipe, and the flow meter of the lift water pipe are electrically connected and linked. The opening of the electric valve of the nitrification liquid return pipe is adjusted by the flow meter of the lift water pipe to achieve proportional changes in the nitrification liquid return flow rate and the lift water volume, and to control the nitrification liquid return flow rate. The aerobic tank is used for wastewater denitrification treatment. When the nitrification liquid return pump and the liftable aeration system are under maintenance, they are lifted out through the equipment lifting hole located at the upper end of the aerobic tank.

6. The underground fully automatic sewage treatment equipment requiring no underwater maintenance as described in claim 5, characterized in that, The liftable aeration system includes a conversion flange, a movable air riser, a riser support, a hose connector, an aeration hose, an open-type fixed sleeve, a fixed support, a movable rope, and a hook. The conversion flange is located near the equipment hoisting hole at the upper end of the aerobic tank, and one end is connected to the air outlet of the blower. The blower is electrically connected to and linked with the dissolved oxygen meter, and the blower adjusts its frequency according to the value measured by the dissolved oxygen meter. The movable air riser is vertically arranged, with its upper end connected to the other end of the conversion flange, and its lower end connected to one end of the hose connector. The riser support is used to limit the movable air riser. The aeration hose is inserted into the open-type fixed sleeve, and one end is connected to the... At the other end of the hose connector, the side wall of the perforated fixed sleeve is provided with multiple holes. The fixed support is used to limit the perforated fixed sleeve. One end of the movable rope is connected to the other end of the aeration hose. The other end of the movable rope passes through the equipment lifting hole located at the upper end of the aerobic tank and is connected to the hook. When the liftable aeration system is being maintained, the equipment lifting hole is opened and the conversion flange is removed. The movable rope is loosened and the movable air riser, the hose connector, and the aeration hose are lifted. The movable air riser and the hose connector pass through the riser support and are lifted to the ground. The aeration hose and the movable rope pass through the perforated fixed sleeve and the riser support in sequence, so that the aeration hose is lifted to the ground for maintenance or replacement.

7. A fully automatic underground sewage treatment equipment requiring no underwater maintenance as described in claim 6, characterized in that, A sedimentation tank inlet pipe connects the aerobic tank and the vertical flow sedimentation tank. An outlet pipe for external discharge is connected to the side of the vertical flow sedimentation tank closest to the equipment room. The vertical flow sedimentation tank contains a liftable central cylinder, a sludge hopper, an effluent weir, and a collection trough. The sludge hopper is located at the bottom of the vertical flow sedimentation tank, and the liftable central cylinder is located above the sludge hopper and below the equipment lifting hole. The sludge-water mixture treated in the aerobic tank flows into the vertical flow sedimentation tank through the sedimentation tank inlet pipe and undergoes sludge-water separation inside. The bottom of the collection trough is connected to one end of the outlet pipe, and the effluent weir is connected to the upper end of the collection trough. The supernatant in the vertical flow sedimentation tank flows into the collection trough through the effluent weir and is then discharged through the outlet pipe after meeting discharge standards. Activated sludge settles and accumulates at the bottom of the sludge hopper. The liftable central cylinder is lifted out through the equipment lifting hole located at the upper end of the vertical flow sedimentation tank during maintenance.

8. A fully automatic underground sewage treatment equipment requiring no underwater maintenance as described in claim 7, characterized in that, The equipment room is equipped with a sludge pump and a blower. The suction end of the sludge pump is connected to a sludge discharge pipe of the sedimentation tank. The suction end of the sludge discharge pipe is located inside the vertical flow sedimentation tank and connected to the sludge hopper. The discharge end of the sludge pump is connected to one end of the return sludge pipe. The middle part of the return sludge pipe is connected to one end of the residual sludge pipe. One end of the residual sludge pipe extends out of the equipment room and is used for external sludge discharge. The sludge pump is used to suck up sludge located inside the sludge hopper and flow it into the anoxic tank through the return sludge pipe or discharge it externally through the residual sludge pipe. The air outlet of the blower is connected to one end of an air pipe. The other end of the air pipe is detachably connected to one end of the conversion flange. After the blower blows air, the gas passes sequentially through the air pipe, the conversion flange, the movable air riser, the hose connector, and the aeration hose, and is discharged from the aeration hose.

9. A fully automatic underground sewage treatment equipment requiring no underwater maintenance as described in claim 4, characterized in that, The return sludge pipe is equipped with a return sludge pipe electric valve and a return sludge pipe flow meter. The return sludge pipe electric valve, the return sludge pipe flow meter, and the lift water pipe flow meter are electrically connected and linked. The return sludge pipe flow meter is used to monitor the sludge return flow rate inside the return sludge pipe. The return sludge pipe electric valve adjusts its opening degree according to the lift water pipe flow meter, thereby achieving a proportional change between the activated sludge return flow rate and the influent flow rate to control the activated sludge return flow rate.

10. A fully automatic underground sewage treatment equipment requiring no underwater maintenance as described in claim 8, characterized in that, The residual sludge pipe is equipped with a residual sludge pipe electric valve and a residual sludge pipe flow meter. The residual sludge pipe flow meter is used to monitor the sludge flow rate inside the residual sludge pipe. The residual sludge pipe electric valve, the lift water pipe flow meter, and the residual sludge pipe flow meter are electrically connected and linked. The residual sludge pipe electric valve adjusts its opening degree according to the lift water pipe flow meter, thereby achieving a proportional change between the residual sludge discharge and the influent flow rate to control the residual sludge discharge.

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