Water outlet weir and intelligent water decanting device

Abstract

The utility model discloses a kind of water weir and intelligent water decanting device, the water weir includes water weir body, weir mouth being opened in the top of the water weir body, one end and the communication of the water weir body of connecting pipe, the other end of the connecting pipe is connected with water outlet pipe, water outlet valve is arranged on the water outlet pipe, the water weir body is connected with float and densimeter, the controller of the water outlet valve is electrically connected with the densimeter, can accurately determine mud-water stratification interface, can effectively block scum and bottom sludge into water weir, ensure water decanting water quality.

Description

Technical Field

[0001] This utility model relates to the field of sewage treatment equipment, and more specifically, to an outlet weir and an intelligent decanting device. Background Technology

[0002] Due to their small scale and limited sludge production, village and town wastewater treatment plants face challenges in installing sludge digestion, drying, or dewatering equipment. This would be costly, require a large area, and be complex to operate. Therefore, sludge generated during wastewater treatment at these plants is typically transported off-site using vacuum trucks. High moisture content in the transported sludge results in large transport volumes and high costs. Therefore, sludge storage tanks are installed at village and town wastewater treatment plants to temporarily store and concentrate sludge, thereby reducing the amount, frequency, and cost of transporting sludge off-site. Decanters are crucial for reducing the moisture content of the sludge in storage tanks. Given the relative lack of operating funds and professional maintenance personnel at village and town wastewater treatment plants, non-powered / micro-powered decanting devices are the preferred choice. Existing non-powered decanting devices mainly include siphon type and buoyancy type. Siphon type non-powered decanting devices require auxiliary aeration and venting devices, making operation relatively complex; the initial flow velocity at the decanting inlet is high, easily carrying sludge; in addition, the decanting height of siphon type decanting devices is limited and not adjustable. Buoyancy type decanting devices are easy to operate and require less maintenance, and are widely used in small SBR tanks or sludge storage tanks.

[0003] Most existing buoyancy-type decanting devices are developed for SBR ponds, with a constant decanting depth, making it impossible to determine the sludge-water stratification interface. When used for decanting sludge storage tanks, they easily carry sludge. Furthermore, some buoyancy-type decanting devices require adjusting the water depth of the float by injecting water into it to achieve sludge retention, which necessitates the use of electromechanical equipment such as water pumps and drainage pumps. Chinese Patent CN102303921B discloses a buoyancy-type decanter, which includes a water collection weir and a control device. The water collection weir floats on the water surface, and the control device controls the water depth of the weir. The bottom of the weir has a drain outlet connected to a drain pipe. This invention is simple and reliable to operate, operates stably, and greatly reduces the problem of sludge entrainment in the effluent. Through buoyancy, the decanter floats on the water surface, ensuring uniform and stable decanting, thus maximizing the weir length. However, this invention has two problems: first, it cannot determine the mud-water stratification interface, which makes it easy to carry sludge when used for decanting in sludge storage tanks; second, it uses a water pump / drainage pump to inject / drain water into the float to control the water depth of the float to block sludge, which requires power consumption and maintenance of electromechanical equipment.

[0004] Therefore, it is necessary for the inventors to design a new outlet weir and intelligent decanting device to overcome the above problems. Summary of the Invention

[0005] The main purpose of this invention is to provide an outlet weir and an intelligent decanting device that can accurately determine the mud-water stratification interface, effectively prevent scum and bottom sludge from entering the outlet weir, and ensure the quality of the decanted water.

[0006] To achieve the above objectives, this utility model provides a water outlet weir, including a water outlet weir body, a weir opening at the top of the water outlet weir body, a connecting pipe with one end connected to the water outlet weir body, a water outlet pipe connected to the other end of the connecting pipe, a water outlet valve provided on the water outlet pipe, a float and a density meter connected to the water outlet weir body, and the density meter being electrically connected to the controller of the water outlet valve.

[0007] Optionally, connecting rods are fixedly connected to both sides of the outlet weir body, the float is fixedly mounted on the connecting rods on both sides, and the density meter is fixedly connected to one of the connecting rods on one side.

[0008] Optionally, slag baffles are also fixedly installed on the connecting rods on both sides.

[0009] Optionally, the slag baffle includes a vertical slag baffle and an inclined slag baffle connected to its bottom, wherein the angle between the inclined slag baffle and the vertical slag baffle is 45°-60°.

[0010] Optionally, the outlet weir body is also connected to a vertical limiting mechanism, which includes a vertically and fixedly installed guide rail, and the connecting rod has a guide rail hole that cooperates with the guide rail.

[0011] Optionally, the guide rails are three in number and are distributed in an isosceles triangle around the outer periphery of the outlet weir body.

[0012] Optionally, a support frame for supporting the outlet weir body is fixedly provided at the bottom of the guide rail.

[0013] Optionally, the connecting pipe is a flexible tube.

[0014] To achieve the above objectives, this utility model provides an intelligent decanting device, including an SBR tank or sludge storage tank, an inlet pipe located above the SBR tank or sludge storage tank, an inlet valve located on the inlet pipe, and the aforementioned outlet weir.

[0015] Optionally, a level gauge is also provided at the top of the SBR tank or sludge storage tank, and the level gauge is electrically connected to the controller of the inlet valve.

[0016] The present invention provides an outlet weir and an intelligent decanting device, which, compared with the prior art, has the following advantages: by setting up a follow-up densitometer to detect the density of mud and water, the mud-water stratification interface can be accurately determined. This is suitable for situations where the decanting volume (i.e., decanting depth) of the mud storage tank is not constant in each cycle, effectively preventing scum and bottom sludge from entering the outlet weir and ensuring the quality of the decanted water. Attached Figure Description

[0017] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model, making other features, objects, and advantages of the utility model more apparent. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0018] Figure 1 This is a schematic diagram of the decanting device.

[0019] Figure 2 This is a top-down view of the decanting system;

[0020] Figure 3 This is a schematic diagram of the slag baffle structure;

[0021] Figure 4 This is a schematic diagram of the guide rail structure;

[0022] Figure 5 yes Figure 1 Enlarged view of point A.

[0023] The components are: 1. Outlet weir body, 2. Slag baffle plate, 21. Slag baffle inclined plate, 22. Slag baffle vertical plate, 3. Float, 4. Flexible hose, 5. Guide rail hole, 6. Guide rail, 61. Horizontal support rod, 62. Diagonal support rod, 7. Density meter, 8. Connecting rod, 81. Nut, 9. Inlet pipe, 10. Inlet valve, 11. Level gauge, 12. Outlet pipe, 13. Outlet valve. Detailed Implementation

[0024] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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 should fall within the protection scope of the present invention.

[0025] It should be noted that the terms "first," "second," etc., in the specification and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of the utility model described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0026] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0027] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0028] In addition, the term "multiple" should mean two or more.

[0029] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] like Figures 1 to 5 As shown, a water outlet weir includes a water outlet weir body 1, a weir opening at the top of the water outlet weir body 1, a connecting pipe with one end connected to the water outlet weir body 1, a water outlet pipe 12 connected to the other end of the connecting pipe, a water outlet valve 13 provided on the water outlet pipe 12, a float 3 and a density meter 7 connected to the water outlet weir body 1, and the density meter 7 is electrically connected to the controller of the water outlet valve 13.

[0031] The weir is triangular in shape; the baffle plate 2 is an integral bent plate, including a baffle plate vertical plate 22 and a baffle plate inclined plate 21 connected to its bottom. The openings of the baffle plate vertical plate 22 and the baffle plate inclined plate 21 are opposite to the outlet weir body 1, and the included angle between the baffle plate vertical plate 22 and the baffle plate inclined plate 21 is preferably 45-60°; the float 3 is set close to the baffle plate vertical plate 22 and is connected to the baffle plate 2 and the outlet weir body 1 by a connecting rod 8 to form a whole; one end of the connecting pipe is connected to the bottom of the outlet weir body 1, and the other end is connected to the drain pipe. Preferably, the connecting pipe is a flexible hose 4, which can be a PE corrugated pipe or a high-flexibility PU flexible hose 4.

[0032] To ensure the stability of the effluent weir body 1 during lifting and lowering, the effluent weir body 1 is also connected to a vertical limiting mechanism. The vertical limiting mechanism includes a vertically and fixedly installed guide rail 6. The connecting rod has a guide rail hole 5 that mates with the guide rail 6. The guide rail 6 passes through the guide rail hole 5 and is vertically fixed to the bottom of the SBR tank or sludge storage tank. The guide rail 6 has a support frame at its lower part, and the support frame is 0.3 to 0.5 m from the bottom of the tank. There are 3 guide rails 6 arranged in an isosceles triangle. The guide rail hole 5 is opened on the connecting rod 8 and is located between the slag baffle 2 and the effluent weir body 1. The diameter of the guide rail hole 5 should preferably be 1.05 to 1.10 times the diameter of the guide rail 6. The density meter 7 is located at the end of one of the connecting rods 8. The connecting rod 8 is an externally threaded cylindrical rod, and the effluent weir body 1, the slag baffle 2, the float 3 and the density meter 7 are connected into a whole by a nut 81.

[0033] like Figure 1 , Figure 2 As shown, an intelligent decanting device is also disclosed, including an SBR tank or sludge storage tank, an inlet pipe 9 located at the top of the SBR tank or sludge storage tank, an inlet valve 10 located on the inlet pipe 9, and the aforementioned outlet weir. A level gauge 11 is also provided at the top of the SBR tank or sludge storage tank, and the level gauge 11 is electrically connected to the controller of the inlet valve 10.

[0034] The inlet pipe 9 is located at the top of the SBR tank or sludge storage tank, and the inlet valve 10 is located on the inlet pipe 9; the level gauge 11 is located at the top of the SBR tank or sludge storage tank, and its height shall not be higher than the center of the inlet pipe 9; the drain pipe is located at the bottom of the SBR tank or sludge storage tank, with one end connected to the hose 4 and the other end extending out of the tank body and connected to the drain valve.

[0035] The size and shape of the effluent weir body 1 are adjusted according to the decanting volume and shape of the SBR tank or sludge storage tank. Multiple hoses 4 can be installed according to the drainage volume. The schematic diagram does not limit the shape of the effluent weir body 1 or the number of hoses 4. The guide rail 6 restricts the decanting device to move only in the vertical direction and is arranged in an isosceles triangle, so that the decanting device rises or falls smoothly, avoiding severe tilting of the effluent weir body 1, which would cause the water flow velocity at some lower weir openings to be too high and thus carry impurities out of the tank. The guide rail 6 does not completely restrict the movement of the hoses 4. In addition to expansion and contraction, the hoses 4 also bend during the decanting process, which greatly improves the decanting depth, i.e., the decanting capacity.

[0036] Control process:

[0037] When decanting the sludge storage tank, the inlet valve 10 is opened, and the sludge from the secondary sedimentation tank of the sewage treatment plant is discharged into the sludge storage tank. The inlet valve 10 is closed by the sludge discharge rate from the secondary sedimentation tank. When the liquid level in the sludge storage tank reaches the warning level, the inlet valve 10 is closed by the sludge storage tank level gauge 11 to prevent sludge from overflowing into the sludge storage tank. After the inlet valve 10 is closed, when the density meter 7 reads ρ1±3‰, the mud and water have separated. At this time, the drain valve is opened, and the supernatant flows from the bottom of the baffle plate 2 to the triangular weir and into the outlet weir. It is discharged outside the tank through the hose 4 and the drain pipe. The scum is blocked by the baffle plate 2. The inclined plate of the baffle plate 2 can catch larger floating objects, which improves the scum-blocking capacity of the baffle plate 2. As the supernatant is discharged from the tank, the liquid level in the tank decreases, and the decanting device drops with the liquid level. When the density meter 7 reads ρ2±5‰, the bottom plate of the outlet weir touches the mud layer. At this time, the drain valve is closed to stop the drainage and prevent the sludge from being discharged. Then open the drain valve to begin the next cycle of discharging sludge into the sludge storage tank, followed by sludge sedimentation and concentration, and decanting.

[0038] When the decanting device needs maintenance, the sludge storage tank is emptied, allowing the decanting device to fall to the support frame of the guide rail 6. The support frame supports the decanting device to prevent it from hitting the bottom of the tank. The support frame consists of a horizontal support rod 61 fixed on the guide rail 6 and an inclined support rod 62 connecting the horizontal support rod 61 and the guide rail 6. The inclined support rod 62 is used for reinforcement.

[0039] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A water outlet weir, characterized in that: It includes a weir body, a weir opening at the top of the weir body, a connecting pipe connected to the weir body at one end, a water outlet pipe at the other end of the connecting pipe, a water outlet valve on the water outlet pipe, a float and a density meter connected to the weir body, and the density meter is electrically connected to the controller of the water outlet valve.

2. The outlet weir as described in claim 1, characterized in that: Both sides of the outlet weir are fixedly connected to connecting rods, the float is fixedly mounted on the connecting rods on both sides, and the density meter is fixedly connected to one of the connecting rods on one side.

3. The outlet weir as described in claim 2, characterized in that: Slag-blocking plates are also fixedly installed on the connecting rods on both sides.

4. The outlet weir as described in claim 3, characterized in that: The slag baffle plate includes a vertical slag baffle plate and an inclined slag baffle plate connected to its bottom. The angle between the inclined slag baffle plate and the vertical slag baffle plate is 45°-60°.

5. The outlet weir as described in claim 2, characterized in that: The outlet weir body is also connected to a vertical limiting mechanism, which includes a vertically and fixedly installed guide rail, and the connecting rod has a guide rail hole that cooperates with the guide rail.

6. The outlet weir as described in claim 5, characterized in that: The guide rails are three in number and are distributed in an isosceles triangle on the outer periphery of the outlet weir body.

7. The outlet weir as described in claim 5, characterized in that: The bottom of the guide rail is fixedly equipped with a support frame for supporting the water outlet weir body.

8. The outlet weir as described in claim 1, characterized in that: The connecting pipe is a flexible hose.

9. A smart decanting device, characterized in that: It includes an SBR tank or sludge storage tank, an inlet pipe located above the SBR tank or sludge storage tank, an inlet valve located on the inlet pipe, and an outlet weir as described in any one of claims 1-8.

10. The intelligent decanting device as described in claim 9, characterized in that: A level gauge is also installed at the top of the SBR tank or sludge storage tank, and the level gauge is electrically connected to the controller of the inlet valve.

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