Sewage treatment device

Abstract

The utility model discloses a sewage treatment device, which comprises an adjusting tank, a first water delivery pipe, a second water delivery pipe, a first water pump, a second water delivery pipe and a third water delivery pipe, the water inlet end of the water return pipe is communicated with the first water conveying pipe, and the water outlet end of the water return pipe extends into the adjusting tank and is close to the water inlet of the water pump; the first nozzle assembly is arranged at the water outlet end of the water return pipe, the first nozzle assembly comprises at least one first nozzle, the first nozzle communicates with the water outlet end of the water return pipe, and the first nozzle assembly is used for spraying liquid to the water inlet of the water pump. The water inlet of the water pump can be prevented from being blocked by sediment deposition, the service life of the water pump is prolonged, and the sewage purification effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a wastewater treatment device. Background Technology

[0002] Most cigarette factories have wastewater treatment facilities to purify production and domestic wastewater. Existing wastewater treatment systems include equalization tanks, dissolved air flotation (DAF) tanks, and biological treatment tanks. The equalization tank regulates the quality and quantity of domestic wastewater, ensuring that subsequent treatment equipment operates under stable conditions and preventing significant fluctuations in water quality and quantity from adversely affecting treatment effectiveness. The DAF tank is located downstream of the equalization tank. It generates microbubbles by introducing air into the wastewater, causing suspended particles to adhere to the bubbles and rise to the surface, achieving solid-liquid separation. It is primarily used to remove fine suspended particles and grease that are difficult to settle in domestic wastewater, reducing the suspended solids content. Generally, equalization tanks are located underground, while DAF tanks are above ground. Therefore, pumps are usually installed in the equalization tank to transfer water to the DAF tank. The biological treatment tank is located downstream of the flotation tank. The biological treatment tank uses the metabolism of microorganisms to decompose organic matter in sewage into harmless substances such as carbon dioxide and water. At the same time, it can also remove nutrients such as nitrogen and phosphorus. It is a key link in the process of removing organic matter and nutrients in the purification of domestic sewage.

[0003] To prevent sediment settling in the equalization tank, existing equalization tanks are equipped with mechanical agitators to homogenize the water quality and prevent sediment deposition. However, the wastewater in the equalization tank contains debris such as woven fabrics, plastic bags, and strips of cloth. This debris can become entangled in the mechanical agitators, causing them to malfunction. When the agitator malfunctions, sediment deposition occurs, clogging the water pump inlet. This not only affects the pump's lifespan but also causes unstable water delivery, impacting the purification effect. Utility Model Content

[0004] The purpose of this invention is to solve the problem in the prior art where mechanical agitators are easily entangled by debris, leading to reduced pump life and weakened purification effect. This invention provides a wastewater treatment device that can replace a mechanical agitator to stir wastewater in the equalization tank, thereby preventing silt deposition and pump blockage, improving pump lifespan, and enhancing wastewater purification efficiency.

[0005] To address the aforementioned technical problems, this utility model discloses a wastewater treatment device, including an equalization tank equipped with a water pump. The wastewater treatment device further includes:

[0006] The first water supply pipe has its inlet end connected to the outlet of the water pump;

[0007] The return water pipe has its inlet end connected to the first water supply pipe, and its outlet end extends into the regulating tank and is located near the water pump inlet.

[0008] A first nozzle assembly is disposed at the outlet end of the return water pipe. The first nozzle assembly includes at least one first nozzle, which is connected to the outlet end of the return water pipe. The first nozzle assembly is used to spray liquid into the inlet of the water pump.

[0009] By adopting the above technical solution, and by setting up a return water pipe, a portion of the water in the regulating tank can be directly transported to the water pump inlet using a water pump. By setting up a first nozzle assembly, water can be sprayed towards the water pump to flush away the silt and sand near the pump, thereby preventing silt and sand accumulation near the pump, and thus improving the service life of the water pump and the sewage purification effect.

[0010] Optionally, the number of first nozzles is at least two, and the outlet of each first nozzle is close to the inlet of the water pump.

[0011] Optionally, the outlet of each first nozzle is set vertically downward.

[0012] Optionally, the cross-sectional area of ​​the outlet of each first nozzle gradually decreases from top to bottom along the vertical direction.

[0013] Optionally, the inlet end of the return water pipe is connected to the middle of the first water supply pipe. The sewage treatment device also includes a flotation tank, the outlet end of the first water supply pipe is connected to the flotation tank, and a valve is provided on the return water pipe to adjust the opening of the return water pipe.

[0014] Optionally, the device also includes a biological treatment tank, and a second water supply pipe is provided between the air flotation tank and the biological treatment tank. The inlet end of the second water supply pipe is connected to the air flotation tank, and the outlet end of the second water supply pipe is connected to the biological treatment tank. The wastewater treatment device also includes a flow meter, which is installed on the second water supply pipe and is used to detect the flow rate of water entering the biological treatment tank.

[0015] Optionally, the valve is an electrically controlled valve, the flow meter is an electronic flow meter, and the sewage treatment device also includes a controller. The controller is electrically connected to the electronic flow meter and the electrically controlled valve respectively. The controller is used to receive the flow value output by the electronic flow meter and adjust the opening degree of the electrically controlled valve according to the flow value output by the electronic flow meter. The opening degree of the electrically controlled valve is proportional to the flow value output by the electronic flow meter.

[0016] Optionally, the stirring device further includes at least one second nozzle assembly, which is disposed on the return water pipe and located upstream of the first nozzle assembly. The second nozzle assembly includes a plurality of second nozzles spaced apart along the extension direction of the return water pipe, and the outlet of each second nozzle is vertically downward.

[0017] Optionally, both the first nozzle assembly and the second nozzle assembly are detachably connected to the return water pipe.

[0018] Optionally, both the first nozzle assembly and the second nozzle assembly are connected to the return water pipe via flanges. Attached Figure Description

[0019] Figure 1 This diagram shows a structural schematic of the wastewater treatment device in an embodiment of the present invention.

[0020] Figure 2 Show Figure 1 A magnified view of part A in the middle.

[0021] Reference numerals in the attached drawings: 1. Equalization tank, 2. Flotation tank, 3. Biological tank, 4. Water pump, 41. Water pump inlet, 42. Water pump outlet, 5. First water supply pipe, 51. Water inlet end of the first water supply pipe, 52. Water outlet end of the first water supply pipe, 6. Return water pipe, 61. Water inlet end of the return water pipe, 62. Water outlet end of the return water pipe, 7. First nozzle assembly, 71. First nozzle, 711. Water outlet of the first nozzle, 8. Valve, 9. Second water supply pipe, 91. Water inlet end of the second water supply pipe, 92. Water outlet end of the second water supply pipe, 10. Flow meter, 11. Second nozzle assembly, 111. Second nozzle, 12. Flange, 13. Sewage inlet, 14. Inlet pipe. Detailed Implementation

[0022] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Although the description of this utility model will be presented in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to this embodiment. On the contrary, the purpose of describing the utility model in conjunction with the embodiments is to cover other options or modifications that may be derived based on the claims of this utility model. To provide a deep understanding of this utility model, many specific details will be included in the following description. This utility model may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this utility model, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0023] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0024] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0025] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0026] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0028] In existing equalization tanks, mechanical agitators are typically installed. These agitators rotate to stir the water, aiming to homogenize the water quality and prevent sediment deposition. However, mechanical agitators have several drawbacks. Because industrial wastewater contains debris such as woven fabrics, plastic bags, cloth strips, sand, and gravel, these materials easily become entangled in the agitator, causing it to malfunction. Once the agitator fails, sediment will accumulate, clogging the pump inlet. This not only affects the pump's lifespan but also leads to unstable water delivery and reduced wastewater purification efficiency.

[0029] To address the aforementioned problems, this utility model proposes a wastewater treatment device. For example... Figure 1 As shown, the wastewater treatment device includes: a regulating tank 1, a water pump 4, a first water supply pipe 5, a return water pipe 6, and a first nozzle assembly 7. The regulating tank 1 is located underground and has a wastewater inlet 13 connected to an inlet pipe 14, allowing wastewater to enter the regulating tank 1 through the inlet pipe 14. Figure 2As shown, the inlet 51 of the first water supply pipe is connected to the outlet 42 of the water pump. The water pump 4 can transport the sewage in the equalization tank 1 to the downstream mechanism for further purification through the first water supply pipe 5. The inlet 61 of the return water pipe is connected to the first water supply pipe 5, and the outlet 62 of the return water pipe extends into the equalization tank 1 and is located near the inlet 41 of the water pump. A first nozzle assembly 7 is installed at the outlet 62 of the return water pipe. The first nozzle assembly 7 includes multiple nozzles arranged in a horizontal direction (e.g., ...). Figure 1 The first nozzles 71, spaced apart in the X direction, are each connected to the outlet end 62 of the return water pipe. The first nozzle assembly 7 is used to spray liquid into the inlet 41 of the water pump. Specifically, as shown... Figure 2 As shown, the outlet 711 of each first nozzle 71 is located close to the inlet 41 of the water pump to disturb the inlet 41 of the water pump and prevent sediment from depositing at the inlet 41 of the water pump.

[0030] When the water pump 4 starts, the water in the regulating tank 1 is pumped into the first water supply pipe 5. Then, part of the water enters the downstream mechanism through the outlet 52 of the first water supply pipe for further purification, and the other part of the water flows back into the regulating tank 1 through the return water pipe 6 to play a role in turbulence.

[0031] By adopting the above technical solution, and by setting up a return water pipe 6, a portion of the water in the regulating tank 1 can be directly transported to the water inlet 41 of the water pump through the return water pipe 6. By setting up the first nozzle assembly 7, water can be sprayed towards the water pump 4 to flush away the silt near the water pump 4, thereby preventing silt deposition near the water pump 4 and improving the service life of the water pump 4 and the sewage purification effect. In addition, compared with mechanical agitators, this hydrodynamic agitator is less susceptible to interference from entangled materials and can reduce the number of parts used, thus lowering production costs.

[0032] Further reference Figure 2 The outlet 711 of the first nozzle is set vertically downward, which can effectively prevent the first nozzle 71 from being blocked by sludge settling during long-term shutdown.

[0033] Further reference Figure 2 The cross-sectional area of ​​the outlet 711 of the first nozzle, from top to bottom in the vertical direction (e.g.) Figure 2 The cross-sectional area gradually decreases (as shown in the T direction). Reducing the cross-sectional area increases the outlet pressure of the first nozzle 711, thereby increasing the rotational speed and turbulence distance of the water flow to some extent. For example, the outlet 711 of the first nozzle is duckbill-shaped. Because the duckbill-shaped outlet has a flat structure, its internal structure is relatively simple, making it suitable for wastewater environments containing impurities. Furthermore, to prevent the first nozzle 71 from rusting after long-term immersion in wastewater and affecting normal use, the material of the first nozzle 71 is preferably PPR, PVC, or stainless steel.

[0034] Further reference Figure 1 The inlet 61 of the return water pipe is connected to the middle of the first water supply pipe 5. The wastewater treatment device also includes a flotation tank 2, which is located above ground and used for flotation separation. The first water supply pipe 5 is located between the equalization tank 1 and the flotation tank 2, and its outlet 52 is connected to the flotation tank 2. A valve 8 is installed on the return water pipe 6, which is used to adjust the opening of the return water pipe 6. By adjusting the opening of the valve 8, the flow rate in the return water pipe 6 can be controlled, so as to ensure that while taking into account the flushing force of the silt at the water pump inlet 41, there is also enough flow to enter the subsequent flotation tank 2 to ensure normal purification.

[0035] Further reference Figure 1 The wastewater treatment device also includes a biological treatment tank 3, which is used for the biodegradation of organic matter. A second water supply pipe 9 is provided between the flotation tank 2 and the biological treatment tank 3. Specifically, the inlet end 91 of the second water supply pipe is connected to the flotation tank 2, and the outlet end 92 of the second water supply pipe is connected to the biological treatment tank 3. Wastewater is purified successively through the equalization tank 1, the flotation tank 2, and the biological treatment tank 3 before being transported to downstream water-using facilities. The wastewater treatment device also includes a flow meter 10, which is installed on the second water supply pipe 9. The flow meter 10 is used to detect the flow rate of water entering the biological treatment tank 3, thereby facilitating the monitoring of the wastewater purification progress and improving the purification effect.

[0036] Furthermore, valve 8 is an electrically controlled valve, flow meter 10 is an electronic flow meter, and the wastewater treatment device also includes a controller (not shown in the figure), which is electrically connected to both the electronic flow meter and the electrically controlled valve. The controller can receive data output from the electronic flow meter and automatically adjust the opening of the electrically controlled valve according to the water flow rate entering the biological treatment tank 3, thereby ensuring the stable operation of the wastewater treatment system. Specifically, the opening of the electrically controlled valve is proportional to the flow rate output by the electronic flow meter. When the flow rate output by the electronic flow meter exceeds the maximum value of the set flow range, the opening of the electrically controlled valve is increased to increase the flow rate entering the return water pipe 6 and decrease the flow rate entering the biological treatment tank 3, ensuring purification quality while increasing the flushing force at the inlet 41 of the water pump. When the flow rate output by the electronic flow meter is lower than the minimum value of the set flow range, the opening of the electrically controlled valve is decreased to increase the flow rate entering the biological treatment tank 3 and decrease the flow rate entering the return water pipe 6, ensuring that there is a sufficient amount of wastewater being purified in the biological treatment tank 3, thereby ensuring the normal operation of downstream water-using facilities.

[0037] Further reference Figure 1The stirring device also includes a second nozzle assembly 11, which is disposed on the return water pipe 6 and located upstream of the first nozzle assembly 7. Specifically, there are multiple second nozzle assemblies 11. A portion of the return water pipe 6 extends horizontally and is located in the central region of the equalization tank 1. Each second nozzle assembly 11 is spaced apart along the extension direction of this portion of the return water pipe 6, and each second nozzle assembly 11 includes three second nozzles 111 spaced apart along the extension direction of this portion of the return water pipe 6. By setting the second nozzle assemblies 11, the water in the middle and upper parts of the equalization tank 1 can be stirred, thereby achieving uniform water quality and preventing sediment deposition.

[0038] Furthermore, the first nozzle assembly 7 and the return water pipe 6, as well as the second nozzle assembly 11 and the return water pipe 6, are detachably connected. This connection method facilitates the replacement or cleaning of the first nozzle assembly 7 and the second nozzle assembly 11 during periodic sludge removal from the equalization tank 1, effectively improving the convenience of equipment maintenance. For example, refer to... Figure 1 The first nozzle assembly 7 and the return water pipe 6 are both connected by flanges 12.

[0039] The mixing device of this invention exhibits numerous advantages in practical applications. Firstly, the hydrodynamic mixing device can dissipate sediment near the water pump 4, thus preventing sediment buildup at the pump inlet 41 and improving the service life of the pump 4 as well as the wastewater purification effect. Secondly, by replacing the mechanical mixing device with the hydrodynamic mixing device, frequent replacement of the mechanical mixer is eliminated, while also reducing the power consumption generated by mechanical mixing. Finally, it improves the stability of the influent water quality, enabling subsequent wastewater treatment processes to operate more stably and efficiently.

[0040] Although the present invention has been illustrated and described with reference to certain preferred embodiments, those skilled in the art should understand that the above description is a further detailed explanation of the present invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the present invention to these descriptions. Those skilled in the art can make various changes in form and detail, including some simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A sewage treatment device comprising a conditioning tank in which a water pump is provided, characterized in that, The sewage treatment device further comprises: a first water delivery pipe, a water inlet end of which is connected to a water outlet of the water pump; a backwater pipe, a water inlet end of which is connected to the first water delivery pipe, and a water outlet end of which extends into the adjusting pool and is arranged close to a water inlet of the water pump; a first nozzle assembly arranged at the water outlet end of the backwater pipe, the first nozzle assembly comprising at least one first nozzle, the first nozzle being connected to the water outlet end of the backwater pipe, and the first nozzle assembly being used for spraying liquid to the water inlet of the water pump.

2. The sewage treatment device according to claim 1, wherein The number of the first nozzles is at least two, and the water outlet of each first nozzle is arranged close to the water inlet of the water pump.

3. The sewage treatment device of claim 2, wherein The water outlet of each first nozzle is arranged vertically downward.

4. The sewage treatment device of claim 3, wherein The cross-sectional area of the water outlet of each first nozzle gradually decreases from top to bottom along the vertical direction.

5. The sewage treatment device according to any one of claims 1 to 4, wherein The water inlet end of the backwater pipe is connected to the middle part of the first water delivery pipe, the sewage treatment device further comprises a flotation tank, the water outlet end of the first water delivery pipe is connected to the flotation tank, a valve is arranged on the backwater pipe, and the valve is used for adjusting the opening degree of the backwater pipe.

6. The sewage treatment device of claim 5, wherein A biochemical tank is further arranged, a second water delivery pipe is arranged between the flotation tank and the biochemical tank, a water inlet end of the second water delivery pipe is connected to the flotation tank, a water outlet end of the second water delivery pipe is connected to the biochemical tank, and a flow meter is arranged on the second water delivery pipe, the flow meter being used for detecting the flow of water entering the biochemical tank.

7. The sewage treatment device of claim 6, wherein The valve is an electrically controlled valve, the flow meter is an electronic flow meter, the sewage treatment device further comprises a controller, the controller is electrically connected to the electronic flow meter and the electrically controlled valve respectively, the controller is used for receiving the flow value output by the electronic flow meter and adjusting the opening degree of the electrically controlled valve according to the flow value output by the electronic flow meter, and the opening degree of the electrically controlled valve is proportional to the flow value output by the electronic flow meter.

8. The sewage treatment device of claim 1, wherein At least one second nozzle assembly is further arranged, the second nozzle assembly is arranged on the backwater pipe, the second nozzle assembly is arranged upstream of the first nozzle assembly, the second nozzle assembly comprises a plurality of second nozzles arranged at intervals along the extension direction of the backwater pipe, and the water outlet of each second nozzle is arranged vertically downward.

9. The sewage treatment device of claim 8, wherein The first nozzle assembly and the second nozzle assembly are detachably connected to the backwater pipe.

10. The sewage treatment device of claim 9, wherein The first nozzle assembly and the second nozzle assembly are connected to the backwater pipe through flanges.

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