A house building underground drainage device and a construction process thereof

Abstract

The application relates to the technical field of civil construction, and discloses a house building underground drainage device and a construction process thereof, which comprises a sedimentation tank, a plurality of parallelly arranged treatment tanks, a plurality of limiting columns arranged in the treatment tank in a vertical direction, a carrier frame assembly movably arranged on the periphery of the limiting column, an aeration device arranged in the treatment tank and located below the carrier frame assembly, a filter tank, and a first conveying pipe, a second conveying pipe and a third conveying pipe. In addition, the application further discloses a construction process of the house building underground drainage device. The application can treat the sewage generated in the house building construction process, and realizes discharge when the sewage meets the discharge standard.

Description

A building underground drainage device and its construction process Technical Field

[0001] This invention relates to the field of civil engineering construction technology, and in particular to an underground drainage device for building construction and its construction process. Background Technology

[0002] In building construction projects, the efficient operation of the underground drainage system is crucial. Wastewater generated during construction mainly includes domestic sewage and construction wastewater. Domestic sewage primarily originates from the daily lives of construction workers, including activities such as bathing and washing. This sewage contains a large number of bacteria, viruses, and parasite eggs. Construction wastewater mainly comes from the construction process, such as concrete mixing, equipment washing, bricklaying, and curing. This wastewater contains a large amount of pollutants such as silt, suspended solids, and oil.

[0003] Construction wastewater is characterized by unstable discharge volumes, high pollutant concentrations, and significant treatment challenges. Due to varying construction schedules, wastewater discharge volumes fluctuate considerably. The wastewater contains high concentrations of pollutants such as suspended solids, chemicals, oil, and bacteria, making treatment difficult. Multiple treatment processes and equipment are required for its management.

[0004] Therefore, for those skilled in the art, designing an underground drainage device for building construction that can treat wastewater generated during building construction has become an urgent technical problem to be solved. Summary of the Invention

[0005] The present invention aims to provide an underground drainage device for buildings and its construction process to overcome the shortcomings mentioned above.

[0006] To achieve the above objectives, a first aspect of the present invention provides a building underground drainage device and its construction process, comprising:

[0007] A sedimentation tank is provided with a first conveying pipe at its inlet end, which is used to convey sewage into the sedimentation tank.

[0008] Multiple treatment tanks are arranged in parallel, with their input ends connected to the output end of the sedimentation tank via a second conveying pipe. Each treatment tank contains multiple vertically aligned limiting columns, with a carrier frame assembly movably fitted around each column. This carrier frame assembly is used for attaching microorganisms to form a biofilm. An aeration device is located below the carrier frame assembly within the treatment tank to provide oxygen to the microorganisms.

[0009] The filter tank, whose input end is connected to the output end of the plurality of treatment tanks via a third delivery pipe, is used to filter suspended solids and microorganisms in wastewater.

[0010] Furthermore, the carrier frame assembly includes:

[0011] A floating box that is movable and suspended in the treatment pool is fitted around the limiting column;

[0012] Multiple connecting ropes are suspended within the treatment tank and fixedly connected at their upper ends to the buoy. These connecting ropes are spaced apart along the periphery of the limiting post. Multiple carrier frames are spaced apart along the length of each connecting rope. These carrier frames are used to attach microorganisms and form a biofilm.

[0013] A counterweight is connected to the lower end of one or more of the connecting ropes, and the counterweight is located on the upper surface of the bottom of the treatment pool.

[0014] Furthermore, the carrier frame includes:

[0015] An annular sleeve connected to the connecting rope, the annular sleeve having a plurality of through holes arranged on its sidewall; and

[0016] The composite filler is filled inside the annular sleeve.

[0017] Furthermore, the counterweight is detachably connected to the lower periphery of the limiting post;

[0018] As the pontoon rises or falls synchronously with the water level in the treatment tank, it can simultaneously rotate around the limiting column in a single direction.

[0019] Furthermore, the projection of the lower end of the limiting post along the vertical direction is a polygon, the counterweight is annular, and the inner sidewall of the counterweight is adapted to the lower end of the limiting post.

[0020] The pontoon is fixedly connected with multiple sliding protrusions, and the upper side wall of the limiting post is provided with multiple spirally ascending sliding grooves. The sliding grooves penetrate the upper end of the limiting post, and the multiple sliding protrusions and multiple sliding grooves are slidably connected in a one-to-one correspondence.

[0021] Furthermore, the aeration device includes:

[0022] A first aeration pipe is fitted around the periphery of each of the plurality of limiting posts, and the first aeration pipe is connected to an aeration disc, the aeration disc being located below the carrier frame; and

[0023] An air pump is located outside the treatment tank. The air pump is connected to the first aeration pipe through a second aeration pipe. A gas flow meter is installed on the second aeration pipe.

[0024] Further, the second delivery pipe includes:

[0025] A first connecting pipe is connected at one end to the output end of the sedimentation tank, with one end of the first connecting pipe located below the first conveying pipe. A first sewage pump is installed on the first connecting pipe.

[0026] The first connecting main pipe connected to the other end of the first connecting pipe, and

[0027] A second connecting pipe is connected at one end to the input end of the treatment tank, and the other end of the second connecting pipe is connected to the first connecting main pipe. A first valve is installed on the second connecting pipe.

[0028] A first filter plate is installed on the inner wall of the sedimentation tank. The first filter plate is located between the first conveying pipe and the first connecting pipe. The first filter plate is used to filter impurities in domestic sewage.

[0029] The third delivery pipe includes:

[0030] A third connecting pipe, one end of which is connected to the output end of the treatment tank, is located below one end of the second connecting pipe, and a second valve is installed on the third connecting pipe.

[0031] The second connecting main pipe is connected to the other end of the third connecting pipe, and

[0032] A fourth connecting pipe is connected at one end to the input end of the filter tank, and the other end of the fourth connecting pipe is connected to the second connecting main pipe. A second sewage pump is installed on the fourth connecting pipe.

[0033] The output end of the filter tank is provided with a fourth conveying pipe, which is located below one end of the fourth connecting pipe, and a third valve is provided on the fourth conveying pipe;

[0034] A second filter plate is installed on the inner wall of the filter tank. The second filter plate is located between the fourth connecting pipe and the fourth conveying pipe. The second filter plate is used to filter suspended solids and microorganisms.

[0035] Furthermore, the lower end of the sedimentation tank is provided with an inverted conical sedimentation section, the sedimentation section is connected to a sewage discharge pipe, and a fourth valve is provided on the sewage discharge pipe;

[0036] An ultraviolet lamp is installed on the inner wall of the filter tank, and the ultraviolet lamp is located between the second filter plate and the fourth conveying pipe.

[0037] Compared with existing technologies, the underground drainage device for buildings and its construction process described in this invention have the following advantages:

[0038] This invention enables the treatment of wastewater generated within a building area using microorganisms, allowing for discharge once it meets emission standards. Since microbial wastewater treatment requires a relatively long time cycle, setting up multiple treatment tanks allows for a sequential, cyclical treatment process, achieving continuous wastewater treatment and reducing the burden on wastewater management.

[0039] A second aspect of the present invention provides a construction process for an underground drainage system in a building, comprising the following steps:

[0040] Step 1: Excavate and construct an underground drainage treatment chamber. The internal clear height of the underground drainage treatment chamber should be greater than twice the height of the treatment pool.

[0041] The second step is to install the sedimentation tank, treatment tank and filter tank in the underground drainage treatment room, and connect them to the first conveying pipe, the second conveying pipe and the third conveying pipe respectively. The first conveying pipe is connected to the domestic sewage drainage pipe of the residents to collect domestic sewage into the sedimentation tank.

[0042] The third step is to attach biofilm to the carrier frame assembly to create a biofilm, and then hoist each carrier frame assembly into the treatment tank by means of hoisting, ensuring that the carrier frame assembly is located around the periphery of the limiting column;

[0043] The fourth step is trial operation, in which domestic sewage is treated in the sedimentation tank and then transported to the treatment tank, ensuring that the sewage in each treatment tank submerges the carrier frame components.

[0044] Furthermore, the second step also includes:

[0045] A flocculation tank is set at the front end of the sedimentation tank (1). The input end of the flocculation tank is connected to the sewage drainage pipe. Coagulants are selectively added to the flocculation tank. The output end of the flocculation tank is connected to the first conveying pipe.

[0046] The third step also includes:

[0047] Before hoisting the carrier frame assembly into the treatment tank, an aeration device is installed around the perimeter of the limiting column and at the bottom of the treatment tank.

[0048] The fourth step also includes:

[0049] The aeration device is activated after the sewage submerges the carrier frame assembly.

[0050] The construction process of the underground drainage device for buildings is the same as the advantages of the underground drainage device for buildings over the existing technology, and will not be repeated here. Attached Figure Description

[0051] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0052] Figure 1 is a schematic diagram of the underground drainage device for buildings according to the present invention;

[0053] Figure 2 is a structural schematic diagram of the underground drainage device for buildings according to the present invention from another perspective.

[0054] Figure 3 is a schematic diagram of the assembly of the carrier frame and aeration device of the present invention.

[0055] Figure 4 is a structural schematic diagram of the invention's shelf assembly;

[0056] Figure 5 is a schematic diagram of the aeration device of the present invention.

[0057] Reference numerals: 1. Sedimentation tank; 2. First conveying pipe; 3. Treatment tank; 4. Second conveying pipe; 5. Carrier frame assembly; 6. Aeration device; 7. Filter tank; 8. Third conveying pipe; 9. Fourth conveying pipe; 10. Third valve; 11. Sewage pipe; 12. Fourth valve; 13. First filter plate; 14. Second filter plate; 15. Ultraviolet lamp; 16. Limiting post; 17. Sliding protrusion; 18. Sliding groove; 19. Hook; 401. First connecting pipe; 402. First sludge... Water pump; 403, First connecting main pipe; 404, Second connecting pipe; 405, First valve; 501, Float box; 502, Connecting rope; 503, Annular sleeve; 504, Through hole; 505, Combined packing; 506, Counterweight; 601, First aeration pipe; 602, Aeration disc; 603, Second aeration pipe; 604, Air pump; 801, Third connecting pipe; 802, Second valve; 803, Second connecting main pipe; 804, Fourth connecting pipe; 805, Second sewage pump. Detailed Implementation

[0058] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0059] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0060] Referring to Figures 1-3, the first aspect of the present invention provides an underground drainage device for building construction, which belongs to the category of underground facilities engineering for building construction. It can treat wastewater generated during the construction process of building construction, and the treated wastewater can be directly discharged after meeting the discharge standards.

[0061] The specific structure includes a sedimentation tank 1, a treatment tank 3, a filtration tank 7, and pipelines for transporting wastewater. The sedimentation tank 1 has a first conveying pipe 2 at its input end, which is used to input wastewater. The first conveying pipe 2 connects to the upper side wall of the sedimentation tank 1, allowing the wastewater to be transported to the top of the sedimentation tank 1 for sedimentation. Multiple treatment tanks 3 are provided, typically three or more, connected in parallel. The input ends of the multiple treatment tanks 3 are connected to the output end of the sedimentation tank 1 via a second conveying pipe 4, selectively transporting wastewater from the sedimentation tank 1 to the treatment tanks 3. The treatment tank 3 has multiple vertically oriented limiting columns 16, with a carrier frame assembly 5 movably fitted around the periphery of each limiting column 16. The carrier frame assembly 5 is used for attaching microorganisms to form a biofilm. An aeration device 6 is provided in the treatment tank 3, located below the carrier frame assembly 5, to provide oxygen to the microorganisms. The limiting column 16 can limit the carrier frame assembly 5, preventing it from shifting during the flow of sewage in the treatment tank 3. The biofilm in this invention uses an inoculation and attachment method, where mature activated sludge is mixed with treated water and repeatedly aerated and water-changed to form a biofilm. The aeration device 6 effectively improves the removal efficiency of microorganisms for COD, ammonia nitrogen, total nitrogen, and total phosphorus. The input end of the filter tank 7 is connected to the output ends of multiple treatment tanks 3 via a third conveying pipe 8. The filter tank 7 is used to filter suspended solids and microorganisms from the sewage, and the sewage can be discharged after meeting discharge standards.

[0062] It should be noted that the sedimentation tank 1, treatment tank 3, and filtration tank 7 of the present invention are all equipped with end caps (not shown in the figure) for sealing purposes, and the end cap of treatment tank 3 should be equipped with an exhaust port. In addition, water level sensors (not shown in the figure) are installed in sedimentation tank 1, treatment tank 3, and filtration tank 7 for monitoring their water levels.

[0063] This invention can treat wastewater generated within a building area using microorganisms, and discharge it after it meets the emission standards. Since microbial wastewater treatment requires a relatively long period, setting up multiple treatment tanks 3 enables a sequential cyclical treatment process, achieving continuous wastewater treatment and reducing the pressure on wastewater treatment.

[0064] Referring to Figures 3-5, the carrier frame assembly includes a float 501, a connecting rope 502, a carrier frame, and a counterweight 506. The float 501 has a hollow structure and can be made of stainless steel to form a hollow, sealed structure, with a density less than that of wastewater. The pontoon 501 is movably fitted around the limiting post 16 and suspended inside the treatment tank 3; multiple connecting ropes 502 are provided, and the connecting ropes 502 are made of corrosion-resistant steel wire or fiber rope. The connecting ropes 502 are also suspended inside the treatment tank 3. The upper end of the connecting rope 502 is fixedly connected to the pontoon 501. Multiple connecting ropes 502 are spaced apart along the periphery of the limiting post 16. Multiple carrier frames are spaced apart along the length of the connecting ropes 502. The carrier frames are used to attach microorganisms to form a biofilm. The density of the carrier frames is greater than that of the sewage. The carrier frames are also suspended under the action of the connecting ropes 502; the counterweight 506 is connected to the lower end of the multiple connecting ropes 502. The density of the counterweight 506 is greater than that of the sewage. The counterweight 506 is located on the upper surface of the bottom of the treatment tank 3. The structure of the float 501, connecting rope 502 and counterweight 506 enables the carrier frame to be suspended on the surface of the sewage. The float 501 can change with the water level in the treatment tank 3, thereby allowing the carrier frame to be submerged in the water and preventing the death of microorganisms.

[0065] During the use of the treatment tank 3 of the present invention, a certain water level should always be maintained in the treatment tank 3 so that the carrier frame can be completely submerged in the water. On the one hand, this can prevent the death of microorganisms, and on the other hand, it can improve the adaptability of microorganisms in the water when new sewage is added later.

[0066] Specifically, the carrier frame includes an annular sleeve 503 and a combined packing material 505. The annular sleeve is connected to a connecting rope 502 via a connecting ring. The annular sleeve 503 has a hollow structure, and its sidewalls are provided with several through holes 504. The combined packing material 505 is filled inside the annular sleeve 503 and consists of aldehyde-modified fiber and plastic sheet, allowing microorganisms to attach to the surface of the annular sleeve 503, the aldehyde-modified fiber, and the plastic sheet.

[0067] Preferably, the counterweight 506 is detachably connected to the lower periphery of the limiting post 16; the float 501 can rotate around the limiting post 16 in a single direction simultaneously as it rises or falls synchronously with the water level in the treatment tank 3. Specifically, the lower end of the limiting post 16 is projected as a polygon in the vertical direction, the counterweight 506 is annular, and the inner sidewall of the counterweight 506 is adapted to the lower end of the limiting post 16; the float 501 is fixedly connected with multiple sliding protrusions 17, and the upper sidewall of the limiting post 16 is provided with multiple spirally ascending sliding grooves 18, which penetrate the upper end of the limiting post 16, and the multiple sliding protrusions 17 and multiple sliding grooves 18 are slidably connected one-to-one.

[0068] After the wastewater in treatment tank 3 has undergone biological treatment, the water in treatment tank 3 is gradually transported to filter tank 7 for filtration. At this time, the water level in filter tank 7 will gradually decrease. After the lower end of the limiting column 16 is connected to the counterweight 506, it can prevent the counterweight 506 from rotating under the action of water flow. As the water level in treatment tank 3 decreases, the float box 501 can rotate around the limiting column 16 in one direction, thereby gradually wrapping the connecting rope 502 around the limiting column 16, thus preventing the connecting ropes 502 around adjacent limiting columns 16 from getting tangled under the impact of water flow. Conversely, when wastewater is added to filter tank 7 again, the water level gradually rises, and the float box 501 rotates in the opposite direction around the limiting column 16 and rises synchronously, and the connecting ropes 502 around a single limiting column 16 are untangled.

[0069] It should be noted that the float 501 in this invention is equipped with a hook 19. The float 501, connecting rope 502, and counterweight 506 are lowered into the treatment tank 3 using the hook 19. During lifting, firstly, the counterweight 506 is aligned with the lower end of the limiting post 16; then, the float 501, connecting rope 502, and counterweight 506 are gradually lowered; finally, when the counterweight 506 contacts the lower end of the limiting post 16, the sliding protrusion 17 is inserted into the sliding groove 18. When the treatment tank 3 is full of sewage, the float 501 gradually floats up, and finally the connecting rope 502 is in a vertical position. The carrier frame can be evenly arranged in the treatment tank 3 in the vertical direction, so that the biofilm can fully contact the sewage.

[0070] Preferably, the aeration device 6 includes a first aeration pipe 601, a second aeration pipe 603, and an air pump 604. The first aeration pipe 601 is annular, and multiple first aeration pipes 601 are correspondingly fitted around multiple limiting posts 16. Each first aeration pipe 601 is connected to an aeration disc 602, which is located below the carrier frame. The air pump 604 is located outside the treatment tank 3 and is connected to the first aeration pipe 601 via the second aeration pipe 603. A gas flow meter is installed on the second aeration pipe 603 to monitor the air flow rate.

[0071] Experiments show that by setting up aeration device 6, the turbulence of the water body can be increased, allowing microorganisms and organic matter in the water to come into full contact. At the same time, the dissolved oxygen concentration in the water is increased, which is conducive to the growth of nitrifying bacteria in the nitrification reaction and results in better COD removal.

[0072] Understandably, the aeration device 6 in treatment tank 3 uses intermittent aeration. When aeration is stopped, the reaction of denitrifying bacteria is enhanced, while when aeration is in progress, the reaction of nitrifying bacteria is enhanced.

[0073] In one specific embodiment of the present invention, the second conveying pipe 4 includes a first connecting pipe 401, a first sewage pump 402, a first connecting main pipe 403, and a second connecting pipe 404. One end of the first connecting pipe 401 is connected to the output end of the sedimentation tank 1, and the other end of the first connecting pipe 401 is connected to the middle of the side wall of the sedimentation tank 1. One end of the first connecting pipe 401 is located below the first conveying pipe 2. The first sewage pump 402 is installed on the first connecting pipe 401. The first connecting main pipe 403 is connected to the other end of the first connecting pipe 401. One end of the second connecting pipe 404 is connected to the input end of the treatment tank 3, and the other end of the second connecting pipe 404 communicates with the first connecting main pipe 403. A first valve 405 is installed on the second connecting pipe 404.

[0074] By turning on the first sewage pump 402 and opening at least one of the first valves 405, the sewage in the sedimentation tank 1 will sequentially enter the treatment tank 3 corresponding to the first valve 405 after passing through the first connecting pipe 401, the first connecting main pipe 403 and the second connecting pipe 404.

[0075] Water treatment using microorganisms has a relatively long cycle, usually around 20-30 days. In this invention, multiple treatment tanks 3 are used in a sequential cycle. Wastewater from a certain period is added to one treatment tank 3 for treatment, and wastewater from the next period is added to the next treatment tank 3 for treatment. After treatment, the wastewater is discharged after passing through a filtration tank 7. The above process is repeated to achieve the treatment process.

[0076] Referring to Figure 1, a first filter plate 13 is installed on the inner wall of the sedimentation tank 1. The first filter plate 13 is located between the first conveying pipe 2 and the first connecting pipe 401, and is used to filter impurities in the wastewater. Over time, the upper surface of the first filter plate 13 should be cleaned regularly to prevent clogging.

[0077] The third conveying pipe 8 includes a third connecting pipe 801, a second connecting main pipe 803, a fourth connecting pipe 804, and a second sewage pump 805. One end of the third connecting pipe 801 is connected to the output end of the treatment tank 3, and the other end is connected to the middle of the side wall of the treatment tank 3. A second valve 802 is installed on the third connecting pipe 801. The second connecting main pipe 803 is connected to the other end of the third connecting pipe 801. One end of the fourth connecting pipe 804 is connected to the input end of the filter tank 7, and one end of the fourth connecting pipe 804 is located above the side wall of the treatment tank 3. The other end of the fourth connecting pipe 804 is connected to the second connecting main pipe 803. A second sewage pump 805 is installed on the fourth connecting pipe 804. A fourth conveying pipe 9 is installed at the output end of the filter tank 7, located below one end of the fourth connecting pipe 804. A third valve 10 is installed on the fourth conveying pipe 9.

[0078] Referring again to Figure 1, a second filter plate 14 is installed on the inner wall of the filter tank 7. The second filter plate 14 is located between the fourth connecting pipe 804 and the fourth conveying pipe 9. The second filter plate 14 is used for suspended solids and microorganisms. Over time, the upper surface of the second filter plate 14 should be cleaned regularly to prevent clogging.

[0079] After treatment in treatment tank 3, the wastewater is discharged above the second filter plate 14 via the third connecting pipe 801, the second connecting main pipe 803, and the fourth connecting pipe. The second filter plate 14 is used to filter fine suspended solids and microorganisms. An ultraviolet lamp 15 is installed on the inner wall of the filter tank 7, located between the second filter plate 14 and the fourth conveying pipe 9. When powered on, the ultraviolet lamp 15 emits ultraviolet light, which can kill pathogens in the wastewater.

[0080] The lower end of the sedimentation tank 1 is provided with an inverted cone-shaped sedimentation section, which is connected to a sewage pipe 11. A fourth valve 12 is installed on the sewage pipe 11. During long-term sedimentation, a large amount of sludge and other impurities will accumulate at the lower end of the sedimentation tank 1 and gather in the sedimentation section. By opening the fourth valve 12, the impurities at the bottom of the sedimentation tank can be cleaned.

[0081] In this invention, the first valve 405, the second valve 80, the third valve 10, and the fourth valve 12 can be solenoid valves. The invention also includes a control unit electrically connected to the aforementioned valves, which can be a PLC device or a computer. Furthermore, the control unit can also be connected to the first sewage pump 402 and the second sewage pump 805 to realize the opening and closing processes of the first sewage pump 402 and the second sewage pump 805. Similarly, the water level sensors in the sedimentation tank 1, the treatment tank 3, and the filter tank 7 can also be electrically connected to the control unit to read the water level information in the sedimentation tank 1, the treatment tank 3, and the filter tank 7.

[0082] The present invention provides a second aspect: a construction process based on the above-mentioned underground drainage device for building construction, comprising the following steps:

[0083] Step 1: Excavate and construct an underground drainage treatment chamber. The internal clear height of the underground drainage treatment chamber should be greater than twice the height of the treatment pool 3.

[0084] The second step is to install sedimentation tank 1, treatment tank 3 and filter tank 7 in the underground drainage treatment room, and connect them to the first conveying pipe 2, the second conveying pipe 4 and the third conveying pipe 8 respectively. The first conveying pipe 2 is connected to the sewage drainage pipe of the residents to collect sewage into sedimentation tank 1.

[0085] The third step is to attach a biofilm to the carrier frame assembly and then hoist the carrier frame assembly 5 into the treatment tank 3.

[0086] The fourth step is trial operation. After the sewage is treated in sedimentation tank 1, it is transported to treatment tank 3, ensuring that the sewage in each treatment tank 3 submerges the carrier frame.

[0087] Preferably, the second step further includes:

[0088] A flocculation tank (not shown in the figure) is set at the front end of the sedimentation tank 1. The input end of the flocculation tank is connected to the sewage drainage pipe. Coagulants are selectively added to the flocculation tank. The output end of the flocculation tank is connected to the first conveying pipe.

[0089] The third step also includes: before hoisting the carrier frame assembly 5 into the treatment tank 3 by means of hoisting, installing an aeration device 6 on the periphery of the limiting column 16 and the bottom of the treatment tank 3.

[0090] The fourth step also includes: turning on the aeration device 6 after the sewage has submerged the carrier frame.

[0091] The process for treating construction wastewater generally includes the following steps:

[0092] Pretreatment: This step involves removing large particles from wastewater and adjusting water quality and quantity using facilities such as screens. If there are no large particles in the wastewater, this step can be skipped. In this invention, a screen (not shown in the figure) can be installed in the flocculation tank to achieve the pretreatment process.

[0093] Coagulation reaction: Adding coagulants to the flocculation tank causes suspended solids in the wastewater to form larger flocs, which facilitates subsequent sedimentation.

[0094] Sedimentation: Wastewater with added coagulant in the flocculation tank is passed into the sedimentation tank, where the coagulated flocs settle down and suspended solids in the wastewater are removed.

[0095] Biochemical treatment: Wastewater from the sedimentation tank is transported to the treatment tank, where microorganisms decompose the organic matter in the wastewater into inorganic matter, reducing the degree of pollution.

[0096] Filtration: Suspended solids and impurities in the wastewater are further removed through a filtration tank. Ultraviolet disinfection and other methods are used to kill bacteria and viruses in the wastewater.

[0097] Discharge or reuse: Treated wastewater that meets discharge standards can be discharged directly; if the water quality is good, it can also be reused for purposes such as washing during construction and landscaping.

[0098] The construction process of the underground drainage device for buildings is the same as the advantages of the underground drainage device for buildings over the existing technology, and will not be repeated here.

[0099] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0100] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A building underground drainage device, characterized in that, include: A sedimentation tank (1) is provided with a first conveying pipe (2) at its input end, which is used to convey sewage into the sedimentation tank (1); Multiple treatment tanks (3) are arranged in parallel. The input ends of the multiple treatment tanks (3) are connected to the output end of the sedimentation tank (1) through a second conveying pipe (4). Multiple vertical limiting columns (16) are provided in the treatment tanks (3). Carrier frame assemblies (5) are movably sleeved on the periphery of the limiting columns (16). The carrier frame assemblies (5) are used to attach microorganisms to form a biofilm. An aeration device (6) is provided in the treatment tanks (3). The aeration device (6) is located below the carrier frame assembly (5) and is used to provide oxygen to the microorganisms. A filter tank (7) is connected to the sedimentation tank (1) through a third conveying pipe (8). The output ends of multiple treatment tanks (3) are connected, and the filter tank (7) is used to filter suspended solids and microorganisms in sewage; the carrier frame assembly (5) includes: a float box (501) movably sleeved around the periphery of the limiting post (16) and suspended in the treatment tank (3); multiple connecting ropes (502) suspended in the treatment tank (3) and fixedly connected at their upper ends to the float box (501), the multiple connecting ropes (502) being spaced apart along the periphery of the limiting post (16), and multiple carrier frames being spaced apart along the length direction of the connecting ropes (502), the carrier frames being used to attach microorganisms to form a biofilm; The carrier frame includes: a ring sleeve (503) connected to the lower ends of the connecting ropes (502), the ring sleeve (503) having several through holes (504) arranged on its sidewall; and a composite filler (505) filled in the ring sleeve (503); the counterweight (506) is detachably connected to the lower periphery of the limiting post (16); the float (501) can rise or fall synchronously with the water level in the treatment tank (3) during the process. It can rotate around the limiting post (16) in a single direction at the same time; the projection of the lower end of the limiting post (16) in the vertical direction is a polygon, the counterweight (506) is annular, and the inner sidewall of the counterweight (506) is adapted to the lower end of the limiting post (16); the float (501) is fixedly connected with multiple sliding protrusions (17), and the upper sidewall of the limiting post (16) is provided with multiple spirally ascending sliding grooves (18), the sliding grooves (18) penetrate the upper end of the limiting post (16), and the multiple sliding protrusions (17) and the multiple sliding grooves (18) are slidably connected one-to-one.

2. The underground drainage device for buildings according to claim 1, characterized in that, The aeration device (6) includes: a first aeration pipe (601) that is sleeved around the periphery of the plurality of limiting posts (16) in a one-to-one correspondence, the first aeration pipe (601) being connected to an aeration disc (602), the aeration disc (602) being located below the carrier frame; and an air pump (604) located outside the treatment tank, the air pump (604) being connected to the first aeration pipe (601) through a second aeration pipe (603), the second aeration pipe (603) being provided with a gas flow meter.

3. The underground drainage device for buildings according to claim 1, characterized in that, The second conveying pipe (4) includes: a first connecting pipe (401) with one end connected to the output end of the sedimentation tank (1), one end of the first connecting pipe (401) being located below the first conveying pipe (2), a first sewage pump (402) being installed on the first connecting pipe (401), a first connecting main pipe (403) being connected to the other end of the first connecting pipe (401), and a second connecting pipe (404) with one end connected to the input end of the treatment tank (3), the other end of the second connecting pipe (404) being connected to the first connecting main pipe (403), and a first valve (405) being installed on the second connecting pipe (404); a first filter plate (13) is installed on the inner wall of the sedimentation tank (1), the first filter plate (13) being located between the first conveying pipe (2) and the first connecting pipe (401), and the first filter plate (13) being used to filter impurities in domestic sewage; the third conveying pipe (8) includes: a third connecting pipe (801) with one end connected to the output end of the treatment tank (3). One end of the third connecting pipe (801) is located below one end of the second connecting pipe (404). A second valve (802) is installed on the third connecting pipe (801). A second connecting main pipe (803) is connected to the other end of the third connecting pipe (801). A fourth connecting pipe (804) is connected to the input end of the filter tank (7). The other end of the fourth connecting pipe (804) is connected to the second connecting main pipe (803). A second sewage pump (805) is installed on the fourth connecting pipe (804). A fourth conveying pipe (9) is installed at the output end of the filter tank (7). The fourth conveying pipe (9) is located below one end of the fourth connecting pipe (804). A third valve (10) is installed on the fourth conveying pipe (9). A second filter plate (14) is installed on the inner wall of the filter tank (7). The second filter plate (14) is located between the fourth connecting pipe (804) and the fourth conveying pipe (9). The second filter plate (14) is used to filter suspended solids and microorganisms.

4. The underground drainage device for buildings according to claim 3, characterized in that, The sedimentation tank (1) has an inverted cone-shaped sedimentation section at its lower end, and the sedimentation section is connected to a sewage pipe (11). A fourth valve (12) is installed on the sewage pipe (11). An ultraviolet lamp (15) is installed on the inner wall of the filter tank (7). The ultraviolet lamp (15) is located between the second filter plate (14) and the fourth conveying pipe (9).

5. A construction process for an underground drainage system for residential buildings according to any one of claims 1 to 4, characterized in that, Includes the following steps: Step 1: Excavate and construct an underground drainage treatment chamber. The internal net height of the underground drainage treatment chamber should be more than twice the height of the treatment tank (3). Step 2: Arrange the sedimentation tank (1), treatment tank (3) and filter tank (7) in the underground drainage treatment chamber and connect them to the first conveying pipe (2), the second conveying pipe (4) and the third conveying pipe (8) respectively. Connect the first conveying pipe (2) to the sewage drainage pipe to collect domestic sewage into the sedimentation tank (1). Step 3: Make a biofilm by attaching the carrier frame assembly (5) to it and hoist each carrier frame assembly (5) into the treatment tank (3) by hoisting, ensuring that the carrier frame assembly (5) is located around the limiting column (16). Step 4: Trial operation. After the domestic sewage is treated by the sedimentation tank (1), it is transported to the treatment tank (3), ensuring that the sewage in each treatment tank (3) submerges the carrier frame assembly (5).

6. The construction process according to claim 5, characterized in that, The second step also includes: setting a flocculation tank at the front end of the sedimentation tank (1), with the input end of the flocculation tank connected to the sewage drainage pipe, selectively adding coagulant into the flocculation tank, and the output end of the flocculation tank connected to the first conveying pipe; the third step also includes: before hoisting the carrier frame assembly (5) into the treatment tank (3) by means of hoisting, installing an aeration device (6) on the periphery of the limiting column (16) and the bottom of the treatment tank (3); the fourth step also includes: turning on the aeration device (6) after the sewage submerges the carrier frame assembly (5).

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