Wastewater scum drainage device and construction mode

Abstract

The invention discloses a wastewater scum drainage device and a construction mode, the wastewater scum drainage device comprises a reservoir, an oxidation pond, a catalysis pond and a scum collection pond, a water inlet pipe is connected between the reservoir and the oxidation pond, a connecting pipe is connected between the catalysis pond and the water inlet pipe, a scum cleaning mechanism is arranged at the top of the oxidation pond, a stirring mechanism is arranged in the catalysis pond, and the scum collection pond is connected with the oxidation pond. A guide plate is arranged between the oxidation pond and the scum collecting pond, a drain pipe is arranged at the top of the outer side surface of the oxidation pond, and a booster pump and a Venturi jet device are arranged on the outer side surface of the oxidation pond. According to the wastewater scum drainage device and the construction mode, the scum cleaning mechanism is arranged at the top of the oxidation pond, and scum on the surface of the oxidation pond can be efficiently cleaned and conveyed to a designated position through the scraper, so that the problem of scum accumulation is effectively solved, and the overall efficiency of wastewater treatment is improved; and the maintenance work such as pipeline blockage caused by scum is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of municipal drainage, and particularly to a waste water scum drainage device and a construction method thereof. Background Art

[0002] In the field of municipal engineering drainage, waste water treatment has always been a crucial link. Traditional drainage devices used in municipal engineering face many problems during the process of treating waste water. On the one hand, the treatment efficiency of scum in waste water is relatively low. Common devices lack effective scum cleaning mechanisms, resulting in the accumulation of scum in treatment units such as oxidation ponds, which not only affects the waste water treatment effect, but may also cause pipeline blockage and increase maintenance costs. On the other hand, the connection between each link in the waste water treatment process is not tight enough. For example, the water flow distribution and treatment coordination between the reservoir, oxidation pond and catalytic pond are poor, and the layout of the inlet pipe, connecting pipe, etc. is unreasonable, unable to give full play to the functions of each treatment pond. At the same time, there are also defects in the design of existing devices in terms of stirring, aeration, etc. For example, the stirring in the catalytic pond is uneven and the aeration in the oxidation pond is insufficient, making the chemical reactions in waste water treatment unable to proceed efficiently and difficult to meet the increasingly strict environmental protection emission standards. In addition, during the installation and construction process of traditional drainage devices, there is a lack of standardized and refined processes, resulting in poor stability and low operating efficiency after the device is installed. Summary of the Invention

[0003] Aiming at the above deficiencies in the prior art, the present invention provides a waste water scum drainage device and a construction method thereof, the purpose of which is to solve the problems that the treatment efficiency of scum in waste water is relatively low, common devices lack effective scum cleaning mechanisms, resulting in the accumulation of scum in treatment units such as oxidation ponds, which not only affects the waste water treatment effect, but may also cause pipeline blockage and increase maintenance costs. On the other hand, the connection between each link in the waste water treatment process is not tight enough. For example, the water flow distribution and treatment coordination between the reservoir, oxidation pond and catalytic pond are poor, and the layout of the inlet pipe, connecting pipe, etc. is unreasonable, unable to give full play to the functions of each treatment pond. At the same time, there are also defects in the design of existing devices in terms of stirring, aeration, etc. For example, the stirring in the catalytic pond is uneven and the aeration in the oxidation pond is insufficient, making the chemical reactions in waste water treatment unable to proceed efficiently and difficult to meet the increasingly strict environmental protection emission standards. In addition, during the installation and construction process of traditional drainage devices, there is a lack of standardized and refined processes, resulting in poor stability and low operating efficiency after the device is installed.

[0004] In order to achieve the above invention purpose, the technical solution adopted by the present invention is as follows:

[0005] A waste water scum drainage device, comprising a reservoir, an oxidation tank, a catalytic tank and a scum collection tank. An inlet pipe is connected between the reservoir and the oxidation tank. A connecting pipe is connected between the catalytic tank and the inlet pipe. A scum cleaning mechanism is arranged at the top of the oxidation tank. A stirring mechanism is arranged inside the catalytic tank. A guide plate is arranged between the oxidation tank and the scum collection tank. A drain pipe is arranged at the top of the outer side of the oxidation tank. A booster pump and a Venturi injector are arranged on the outer side of the oxidation tank.

[0006] Further, two inlet valves are arranged on the inlet pipe, and the connecting pipe is located between the two inlet valves.

[0007] Further, the scum cleaning mechanism includes a driving roller rotatably connected to the top of the oxidation tank and a driven roller arranged in pairs with the driving roller. A conveyor belt is connected between the driving roller and the driven roller. A plurality of uniformly distributed scraping plates are arranged on the conveyor belt. A first motor is fixedly installed on the oxidation tank, and the output shaft of the first motor is fixedly connected to one end of the driving roller.

[0008] Further, the stirring mechanism includes a second motor fixedly installed on the top of the catalytic tank. A rotating shaft is fixedly connected to the output shaft of the second motor. A plurality of uniformly distributed stirring rods are fixedly connected to the rotating shaft.

[0009] Further, a feeding port is arranged on the top of the catalytic tank, and a cover door is arranged on the feeding port.

[0010] Further, the water inlet end of the booster pump is communicated with the oxidation tank, the water outlet end of the booster pump is communicated with the water inlet end of the Venturi injector, and the water outlet end of the Venturi injector is communicated with the oxidation tank.

[0011] Further, a liquid level sensor is arranged inside the oxidation tank.

[0012] A construction method of a waste water scum drainage device, comprising the following steps:

[0013] S1: Site measurement and positioning: Use a total station to conduct axis lofting on the reservoir, oxidation tank, catalytic tank and scum collection tank, and set permanent control piles;

[0014] S2: Earthwork excavation and foundation treatment: Use a backhoe excavator to excavate the pool foundation pit in layers, with a slope coefficient of 1:1. Manually clean the bottom to the design elevation. The bottom plates of the reservoir and the oxidation tank are constructed synchronously. The steel bar binding adopts an upper and lower layer mesh structure;

[0015] S3: Concrete pouring and curing: The pool wall is poured in sections, with each section height ≤ 2m. A water stop steel plate is embedded at the joint;

[0016] S4: Laying of the inlet pipe and the connecting pipe: The inlet pipe and the connecting pipe adopt HDPE double-wall corrugated pipes. A 10-mm expansion gap is reserved for the socket joint. Clean the sealing surface and apply food-grade silicone grease before connection. The installation spacing of the two inlet valves on the inlet pipe is ≥1.5 times the pipe diameter. The included angle between the connecting pipe and the inlet pipe is ≤45°. Flange connection is adopted and anti-corrosion treatment is carried out.

[0017] S5: Installation of the booster pump and the Venturi injector: The water inlet end of the booster pump is connected to the opening on the side wall of the oxidation tank, and the water outlet end is connected to the Venturi injector through a PVC pipe.

[0018] S6: Installation of the scum cleaning mechanism: The parallelism deviation between the axis of the driving roller and the long side of the oxidation tank is ≤2 mm. The chain tension of the driven roller is adjusted by the tensioning bolt. The gap between the scraper and the tank wall is ≤5 mm.

[0019] Further, in the step S5, after installation, no-load commissioning is carried out. Check that the vibration value of the pump body is ≤4.5 mm / s and the back pressure of the Venturi injector is ≥0.2 MPa.

[0020] Further, in the step S6, after the conveyor belt is installed, it is pre-run for 2 hours, the linear speed is adjusted to 10 m / min, and observe whether the slag scraping trajectory covers the full width of the liquid surface.

[0021] The coaxiality between the output shaft of the first motor and the driving roller is ≤0.1 mm. The no-load current is ≤30% of the rated value, and the temperature rise is ≤40 °C.

[0022] The beneficial effects of the present invention are as follows:

[0023] Efficient scum cleaning: By setting a scum cleaning mechanism on the top of the oxidation tank, the scraper can efficiently clean the scum on the surface of the oxidation tank and convey it to the designated position, effectively solving the problem of scum accumulation, improving the overall efficiency of wastewater treatment, and reducing maintenance work such as pipeline blockage caused by scum.

[0024] Optimized water flow distribution: The reservoir and the oxidation tank are connected by an inlet pipe, and there are two inlet valves on the inlet pipe. The connecting pipe is located between them, which can accurately control the flow rate and timing of the water flowing into the oxidation tank and the catalytic tank, enabling the wastewater to be reasonably distributed in different treatment units, giving full play to the respective functions of the oxidation tank and the catalytic tank, and improving the wastewater treatment effect.

[0025] Strengthened stirring and reaction: The stirring mechanism in the catalytic tank can fully stir the wastewater and the added chemicals in the catalytic tank, making the chemical reaction more uniform and efficient, helping to improve the quality of wastewater treatment and accelerating the treatment speed.

[0026] Good aeration effect: The combined setting of the booster pump and the Venturi injector. The booster pump pressurizes and transports the water in the oxidation tank to the Venturi injector and then returns it to the oxidation tank, which can form a good aeration effect in the oxidation tank, increase the dissolved oxygen content in the water, promote the oxidation reaction, and further improve the wastewater treatment capacity.

[0027] Precise installation and stable operation: From site measurement and positioning to the installation of each component, such as the strict requirements for the interfaces, spacing, and angles during the laying of the inlet pipe and connecting pipe, as well as the debugging standards after the installation of the booster pump, Venturi injector, scum cleaning mechanism, etc., ensure the stability and efficient operation of the device after installation, extend the service life of the device, and reduce operation failures.

[0028] Real-time liquid level monitoring: A liquid level sensor is set in the oxidation tank, which can monitor the liquid level situation in the oxidation tank in real time, facilitating the staff to timely grasp the wastewater treatment process, make corresponding adjustments, and ensure the stable operation of the drainage device. Brief description of the drawings

[0029] Figure 1 is a three-dimensional structure schematic diagram of the present invention;

[0030] Figure 2 is a structure schematic diagram of the stirring mechanism of the present invention;

[0031] Figure 3 is a flow chart of the construction method of the present invention.

[0032] List of reference numerals in the drawings:

[0033] 1, water storage tank; 2, oxidation tank; 3, catalytic tank; 4, scum collection tank; 5, inlet pipe; 6, connecting pipe; 7, guide plate; 8, drain pipe; 9, booster pump; 10, Venturi injector; 11, inlet valve; 12, driving roller; 13, driven roller; 14, conveyor belt; 15, scraper; 16, first motor; 17, second motor; 18, rotating shaft; 19, stirring rod; 20, feeding port; 21, cover door; 22, liquid level sensor. Detailed implementation manners

[0034] The following further illustrates the detailed implementation manners of the present invention with reference to the drawings. The same components are denoted by the same reference numerals.

[0035] It should be noted that the terms "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the terms "inner" and "outer" respectively refer to the directions towards or away from the geometric center of a specific component.

[0036] In order to make the content of the present invention easier to be clearly understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0037] As Figures 1 to 3 shown, a wastewater scum drainage device and construction method include a reservoir 1, an oxidation tank 2, a catalytic tank 3 and a scum collection tank 4.

[0038] The reservoir 1 serves as the initial collection place for wastewater and is connected to the oxidation tank 2 through a water inlet pipe 5 to provide water source for subsequent oxidation treatment.

[0039] The oxidation tank 2 is equipped with a scum cleaning mechanism at the top, which can effectively remove the scum on the water surface. A drain pipe 8 is provided at the top of the side for discharging the preliminarily treated water.

[0040] The catalytic tank 3 is connected to the water inlet pipe 5 through a connecting pipe 6 and undertakes the function of catalytic reaction in the wastewater treatment process to further purify the water quality.

[0041] The scum collection tank 4 is connected to the oxidation tank 2 through a guide plate 7 for collecting the scum cleared from the oxidation tank 2.

[0042] Two water inlet valves 11 are provided on the water inlet pipe 5, and the connecting pipe 6 is located between the two water inlet valves 11. The operator can accurately control the wastewater flow rates flowing into the oxidation tank 2 and the catalytic tank 3 by controlling the opening and closing degrees of the water inlet valves 11.

[0043] The scum cleaning mechanism is installed on the top of the oxidation tank 2 and consists of a driving roller 12, a driven roller 13, a conveyor belt 14, a scraper 15 and a first motor 16. The driving roller 12 is rotatably connected to the top of the oxidation tank 2, and the driven roller 13 is arranged in pairs with it. A conveyor belt 14 is connected between the two. A number of scrapers 15 are evenly distributed on the conveyor belt 14. The first motor 16 is fixedly installed on the oxidation tank 2, and its output shaft is firmly connected to one end of the driving roller 12. During operation, the first motor 16 drives the driving roller 12 to rotate, thereby driving the conveyor belt 14 to circulate. The scraper 15 moves accordingly, scraping the scum on the water surface of the oxidation tank 2 and transporting it to a designated position, effectively solving the problems that the scum accumulation of the traditional device affects the treatment effect and easily blocks the pipeline.

[0044] The stirring mechanism is installed inside the catalytic tank 3 and consists of a second motor 17, a rotating shaft 18 and stirring rods 19. The second motor 17 is fixed on the top of the catalytic tank 3, and its output shaft is fixedly connected to the rotating shaft 18. A number of stirring rods 19 are evenly fixed on the rotating shaft 18. When the second motor 17 is started, the output shaft drives the rotating shaft 18 to rotate, and the stirring rods 19 accordingly fully stir the wastewater and the added medicament in the catalytic tank 3, promoting the uniform and efficient progress of the chemical reaction, and greatly improving the quality and speed of wastewater treatment.

[0045] At the top of the catalytic pool 3, there is a feeding port 20, which is convenient for adding various reagents used in the catalytic reaction. There is also a cover door 21 on the feeding port 20, which can prevent sundries from entering and the volatilization of reagents. On the outer side of the oxidation pool 2, a booster pump 9 and a Venturi injector 10 are installed. The water inlet end of the booster pump 9 is connected to the oxidation pool 2, and the water outlet end is connected to the water inlet end of the Venturi injector 10. The water outlet end of the Venturi injector 10 is then connected to the oxidation pool 2. Through this combination, a good aeration effect can be formed in the oxidation pool 2, increasing the dissolved oxygen content in the water and improving the oxidation reaction efficiency. In addition, a liquid level sensor 22 is installed in the oxidation pool 2, which can monitor the liquid level in the oxidation pool 2 in real time and provide data for the staff to adjust the treatment process.

[0046] Site measurement and positioning. In the early stage of construction, a total station is used to accurately loft the axes of the reservoir 1, oxidation pool 2, catalytic pool 3 and scum collection pool 4. Through the high-precision measurement of the total station, the accurate positions of each pool are determined, and permanent control piles are set. These control piles play a key positioning role in the subsequent construction process, ensuring that each pool meets the design requirements in terms of plane position and elevation.

[0047] Earthwork excavation and foundation treatment. A backhoe excavator is used to excavate the pool foundation pit in layers. During the excavation process, the slope coefficient is strictly controlled at 1:1 to ensure the stability of the foundation pit slope. When the excavation approaches the design elevation, manual bottom cleaning is used to accurately clean the bottom of the foundation pit to the design elevation, avoiding adverse effects on the foundation caused by over-excavation or under-excavation. In terms of foundation treatment, the bottom plate construction of the reservoir 1 and the oxidation pool 2 is carried out synchronously. The steel bar binding adopts an upper and lower layer mesh structure to enhance the bearing capacity of the bottom plate and ensure the stability of the pool structure.

[0048] Concrete pouring and curing. The pool wall construction adopts a segmented pouring method, and the pouring height of each segment is strictly controlled at ≤2m to ensure the quality of concrete pouring. A water stop steel plate is embedded at each joint to effectively prevent the leakage of the pool wall and ensure the waterproof performance of the entire pool. After the concrete pouring is completed, curing is carried out according to the specification requirements to make the concrete strength increase normally and reach the designed strength grade.

[0049] Laying of the inlet pipe and connecting pipe. The inlet pipe 5 and the connecting pipe 6 are made of HDPE double-wall corrugated pipe, which has the advantages of high strength and corrosion resistance. When connecting, a 10mm expansion gap is reserved for the socket joint to adapt to the expansion and contraction deformation of the pipeline caused by factors such as temperature changes. Before connection, the sealing surface is carefully cleaned and food-grade silicone grease is applied to ensure the sealing performance of the joint. The installation distance between the two inlet valves 11 on the inlet pipe 5 is ≥1.5 times the pipe diameter to ensure the normal operation of the valve and the water flow control effect. The included angle between the connecting pipe 6 and the inlet pipe 5 is ≤45°, and the flange connection method is adopted, and the connection part is comprehensively anti-corrosion treated to extend the service life of the pipeline.

[0050] Install the booster pump and the Venturi injector. Connect the water inlet end of the booster pump 9 to the hole pre-drilled on the side wall of the oxidation tank 2, ensuring a tight connection without water leakage. Connect the water outlet end of the booster pump 9 to the Venturi injector 10 through a PVC pipe. After installation, conduct no-load commissioning. Check that the vibration value of the pump body is ≤ 4.5 mm / s to ensure the stable operation of the pump body; at the same time, check that the back pressure of the Venturi injector 10 is ≥ 0.2 MPa to ensure its normal operation and provide a good aeration effect for the oxidation tank 2.

[0051] Install the scum cleaning mechanism. When installing the driving roller 12, strictly control the parallelism deviation between its axis and the long side of the oxidation tank 2 to be ≤ 2 mm to ensure the stable operation of the conveyor belt 14. Adjust the chain tightness of the driven roller 13 through the tensioning bolt to ensure that the conveyor belt 14 always maintains an appropriate tension. When installing the scraper 15, ensure that the gap between it and the pool wall is ≤ 5 mm to improve the slag scraping effect. After installing the conveyor belt 14, pre-run it for 2 hours, adjust the linear speed to 10 m / min, and observe whether the slag scraping trajectory covers the entire width of the liquid surface to ensure the effective operation of the scum cleaning mechanism. At the same time, control the coaxiality between the output shaft of the first motor 16 and the driving roller 12 to be ≤ 0.1 mm, the no-load current to be ≤ 30% of the rated value, and the temperature rise to be ≤ 40 °C to ensure the normal operation of the motor and transmission components.

[0052] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A wastewater scum drainage device, characterized in that, It includes a reservoir (1), an oxidation tank (2), a catalytic tank (3) and a scum collection tank (4). An inlet pipe (5) is connected between the reservoir (1) and the oxidation tank (2). A connecting pipe (6) is connected between the catalytic tank (3) and the inlet pipe (5). A scum cleaning mechanism is provided at the top of the oxidation tank (2). A stirring mechanism is provided inside the catalytic tank (3). A guide plate (7) is provided between the oxidation tank (2) and the scum collection tank (4). A drain pipe (8) is provided at the top of the outer side of the oxidation tank (2). A booster pump (9) and a Venturi injector (10) are provided on the outer side of the oxidation tank (2).

2. The wastewater scum drainage device according to claim 1, characterized in that: Two inlet valves (11) are provided on the inlet pipe (5), and the connecting pipe (6) is located between the two inlet valves (11).

3. The wastewater scum drainage device according to claim 1, characterized in that: The scum cleaning mechanism includes a driving roller (12) rotatably connected to the top of the oxidation tank (2) and a driven roller (13) arranged in pairs with the driving roller (12). A conveyor belt (14) is connected between the driving roller (12) and the driven roller (13). A number of uniformly distributed scraping plates (15) are provided on the conveyor belt (14). A first motor (16) is fixedly installed on the oxidation tank (2), and the output shaft of the first motor (16) is fixedly connected to one end of the driving roller (12).

4. A wastewater scum drainage device according to claim 1, characterized in that: The stirring mechanism includes a second motor (17) fixedly installed on the top of the catalytic tank (3). A rotating shaft (18) is fixedly connected to the output shaft of the second motor (17). A number of uniformly distributed stirring rods (19) are fixedly connected to the rotating shaft (18).

5. The wastewater scum drainage device according to claim 1, characterized in that: A feeding port (20) is provided on the top of the catalytic tank (3), and a cover door (21) is provided on the feeding port (20).

6. The wastewater scum drainage device according to claim 1, characterized in that: The water inlet end of the booster pump (9) is communicated with the oxidation tank (2), the water outlet end of the booster pump (9) is communicated with the water inlet end of the Venturi injector (10), and the water outlet end of the Venturi injector (10) is communicated with the oxidation tank (2).

7. The waste water scum drainage device according to claim 1, wherein: A liquid level sensor (22) is provided inside the oxidation tank (2).

8. A construction method of a waste water scum drainage device, comprising the waste water scum drainage device according to any one of claims 1 to 7, characterized in that: It includes the following steps: S1: Site measurement and positioning: Use a total station to carry out axis lofting for the reservoir (1), oxidation tank (2), catalytic tank (3) and scum collection tank (4), and set permanent control piles; S2: Earthwork excavation and foundation treatment: Use a backhoe excavator to excavate the pool foundation pit in layers, with a slope coefficient of 1:

1. Manually clean the bottom to the design elevation. The bottom plates of the reservoir (1) and the oxidation tank (2) are constructed synchronously, and the steel bars are tied with an upper and lower layer mesh structure; S3: Concrete pouring and curing: The pool wall is poured in sections, with each section height ≤ 2m, and a water stop steel plate is embedded at the joint; S4: Laying of the inlet pipe (5) and the connecting pipe (6): The inlet pipe (5) and the connecting pipe (6) use HDPE double-wall corrugated pipes. A 10mm expansion gap is reserved at the socket joint. Clean the sealing surface and apply food-grade silicone grease before connection. The installation distance between the two inlet valves (11) on the inlet pipe (5) is ≥ 1.5 times the pipe diameter. The included angle between the connecting pipe (6) and the inlet pipe (5) is ≤ 45°. Flange connection is used and anti-corrosion treatment is carried out; S5: Installation of the booster pump (9) and the Venturi injector (10): The water inlet end of the booster pump (9) is connected to the opening on the side wall of the oxidation tank (2), and the water outlet end is connected to the Venturi injector (10) through a PVC pipe. S6: Installation of the scum cleaning mechanism: The parallelism deviation between the axis of the driving roller (12) and the long side of the oxidation tank (2) is ≤ 2 mm. The chain tension of the driven roller (13) is adjusted by the tensioning bolt, and the gap between the scraper (15) and the tank wall is ≤ 5 mm.

9. The construction method of a wastewater scum drainage device according to claim 8, characterized in that: In the step S5, after installation, an unloaded test run is carried out to check that the vibration value of the pump body is ≤ 4.5 mm / s, and the back pressure of the Venturi injector (10) is ≥ 0.2 MPa.

10. The construction method of a wastewater scum drainage device according to claim 8, characterized in that: In the step S6, after the conveyor belt (14) is installed, it is pre-run for 2 hours, the linear speed is adjusted to 10 m / min, and it is observed whether the slag scraping trajectory covers the full width of the liquid surface. The coaxiality between the output shaft of the first motor (16) and the driving roller (12) is ≤ 0.1 mm, the no-load current is ≤ 30% of the rated value, and the temperature rise is ≤ 40 °C.

Images