An unpowered orifice jet hydraulic mixing well

Abstract

The application discloses a non-powered orifice jet flow type hydraulic mixing well, which comprises an inner well body, an outer well body, an upper water inlet box culvert, a lower water inlet box culvert and a water outlet; the inner well body is located at the center position of the hydraulic mixing well, is not covered, and is provided with a jet flow hole group at the bottom; the outer well body is located at the outer periphery of the inner well body, is not covered, and forms an annular space with the inner well body; the upper water inlet box culvert is located above the lower water inlet box culvert and is communicated with the side edge of the inner well body, and is used for introducing water into the inner well body; the lower water inlet box culvert is located below the upper water inlet box culvert and is communicated with the inner well body through the jet flow hole group at the bottom of the inner well body; and the water outlet is located at the bottom of the outer side of the outer well body, and the mixed water flows out of the hydraulic mixing well through the water outlet. The hydraulic mixing well has reasonable structure, high engineering stability, saves energy and has strong practicability for actual engineering.

Description

Technical Field

[0001] This application relates to the field of water conservancy engineering technology, and in particular to a non-powered orifice jet type hydraulic mixing well. Background Technology

[0002] In wastewater treatment projects, the concentrations of substances in different water bodies often vary. Depending on the treatment requirements, it is necessary to mix two or more water bodies with different concentrations to create a homogeneous solution. To achieve this, specialized centralized treatment tanks are typically installed, equipped with mixing machinery or other specialized equipment. While this solves the problem, it consumes significant amounts of energy, space, and capital. Furthermore, the maintenance of electrical and mechanical equipment increases costs and poses safety hazards. Additionally, the water pumped by the pumps possesses a certain kinetic energy. Within the treatment tank, this kinetic energy is not only not fully utilized but also increases the load and wear on the mixing equipment. Summary of the Invention

[0003] Objective: In order to overcome the shortcomings of the existing technology, the present invention provides a non-powered orifice jet type hydraulic mixing well, which uses orifice jet to mix two types of water with different qualities or concentrations evenly, saving energy and having strong applicability.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0005] This application provides a non-powered orifice jet type hydraulic mixing well, including: an inner well body, an outer well body, an upper inlet culvert, a lower inlet culvert, and an outlet;

[0006] The inner well body is located at the center of the hydraulic mixing well, without a cover, and has a group of jet holes at the bottom;

[0007] The outer well body is located on the outer periphery of the inner well body, has no cover, and forms an annular space with the inner well body;

[0008] The upper water inlet culvert is located above the lower water inlet culvert and is connected to the side of the inner well body, and is used to introduce water into the inner well body;

[0009] The lower inlet culvert is located below the upper inlet culvert and is connected to the inner well body through a group of jet holes at the bottom of the inner well body;

[0010] The outlet is located at the bottom of the outer side of the outer well body, and the mixed water flows out of the hydraulic mixing well through the outlet.

[0011] The annular space formed between the inner and outer well bodies serves as a water flow channel. Mixed water overflows from the upper edge of the inner well body and enters the outer well body, undergoing further mixing as it flows downstream. An outlet is located at the bottom of the outer well body to discharge the mixed water.

[0012] The jet orifice group at the bottom of the inner well connects the inner well to the lower inlet culvert, allowing two water streams from different sources to flow into the inner well simultaneously. The two streams collide and mix inside the well to achieve uniform mixing.

[0013] Because of its low location, the outlet allows the water to maintain a certain flow velocity after it flows out, thus meeting the needs of the downstream. Its downstream side is typically connected to an aqueduct, culvert, or other water-carrying structure.

[0014] In some embodiments, a guide pier is provided at the bottom of the inner side of the lower water intake culvert. The guide pier is located below the jet hole group at the bottom of the inner well body and is used to change the flow direction of the water in the lower water intake culvert. In conjunction with the jet hole group, the water in the lower water intake culvert forms multiple jets and enters the inner well body.

[0015] By setting a group of jet holes at the bottom of the inner well body and setting a guide pier on the inner bottom surface of the lower water intake culvert, the kinetic energy of the water body can be fully utilized, so that the water body forms multiple jets that enter the inner mixing well body, collide with the water body drawn by the upper water intake culvert and mix thoroughly, without the need for external power support.

[0016] In some embodiments, the elevation of the top edge of the outer well body is higher than the elevation of the top edge of the inner well body.

[0017] In some embodiments, the elevation of the top edge of the outer well body is higher than the water surface elevation of the water source drawn by the lower intake culvert.

[0018] In some embodiments, the water surface elevation of the water source drawn from the upper inlet culvert is lower than the water surface elevation of the water source drawn from the lower inlet culvert.

[0019] In some embodiments, the elevation of the top edge of the inner well body is higher than the water surface elevation of the water source drawn by the upper intake culvert.

[0020] In some embodiments, the guide pier is a cross-shaped guide pier, comprising two trapezoidal partitions that intersect in a cross shape.

[0021] In some embodiments, the height of the guide pier is 0.4 to 0.5 times the internal height of the lower intake culvert.

[0022] In some embodiments, the jet orifice group comprises a plurality of orifices arranged in a symmetrical array.

[0023] The water flow in the lower intake culvert passes through the cross-shaped guide pier below the jet orifice group and then flows into the jet orifice group. After passing through the jet orifice group, the entire flow forms multiple jets, which directly collide and mix with the water drawn from the upper intake culvert. To achieve a good mixing effect, the orifices are generally symmetrically distributed to ensure that the multiple jets can be dispersed and fully mixed with other water bodies. The specific size and number of orifices need to be determined according to the different water flow conditions of each project; if possible, it is best to verify this with hydraulic model tests.

[0024] In some embodiments, the inner well body and the outer well body are made of one or more of concrete, steel bars, and engineering plastics.

[0025] Beneficial effects:

[0026] 1. The non-powered orifice jet hydraulic mixing well provided by the present invention has a reasonable mixing well body and its auxiliary structures, which can mix two waters of different concentrations evenly and then discharge them, facilitating unified treatment in the later stage.

[0027] 2. The non-powered orifice jet-type hydraulic mixing well provided by this invention saves energy and money, increases engineering stability, and reduces construction difficulty: This hydraulic mixing well can complete the process of water mixing uniformly by utilizing the kinetic energy of the water itself, without the need to install large electromechanical or mechanical equipment, and without consuming energy. This saves energy, engineering costs and operation and maintenance costs, and eliminates the impact of later equipment failures and maintenance; it also reduces the installation and debugging of equipment and lowers the construction difficulty.

[0028] 3. The non-powered orifice jet-type hydraulic mixing well provided by the present invention saves space: This hydraulic mixing well, through a reasonable structural design, guides the water to complete the concentration mixing during transportation, eliminating the need for a dedicated large treatment tank and saving space.

[0029] 4. The non-powered orifice jet-type hydraulic mixing well provided by this invention has strong applicability to practical engineering: The concept of this hydraulic mixing well comes from the needs of actual engineering. Its shape and size, as well as the number, location and size of the orifices, can be designed according to different projects. It has a wide range of adaptability. By controlling the flow velocity and flow rate of the incoming water, it can achieve the purpose of uniform concentration by utilizing its own kinetic energy. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is an external schematic diagram of a non-powered orifice jet hydraulic mixing well in an embodiment of the present invention;

[0032] Figure 2 This is a schematic cross-sectional view of the structure of the non-powered orifice jet hydraulic mixing well in an embodiment of the present invention;

[0033] Figure 3 This is a schematic diagram of the jet hole group at the bottom of the inner well body of the non-powered orifice jet hydraulic mixing well in an embodiment of the present invention;

[0034] Figure 4 This is a schematic diagram of the water level measuring points and concentration sampling points for the model experiment.

[0035] In the diagram: 1 Inner well body, 2 Outer well body, 3 Upper inlet culvert, 4 Lower inlet culvert, 5 Jet orifice group, 6 Guide pier, 7 Outlet, 8 Non-powered jet hydraulic mixing well. Detailed Implementation

[0036] The technical solutions in 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. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use.

[0037] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may include different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0038] Example 1:

[0039] This embodiment provides a non-powered orifice jet-type hydraulic mixing well, such as... Figure 1 , Figure 2 As shown, it includes: inner well body 1, outer well body 2, upper inlet culvert 3, lower inlet culvert 4 and outlet 7;

[0040] The inner well body 1 is located at the center of the hydraulic mixing well, without a cover, and has a jet hole group 5 at the bottom;

[0041] The outer well body 2 is located on the outer periphery of the inner well body 1, without a cover, and forms an annular space with the inner well body 1;

[0042] The upper water inlet culvert 3 is located above the lower water inlet culvert 4 and is connected to the side of the inner well body 1, and is used to introduce water into the inner well body 1.

[0043] The lower water inlet culvert 4 is located below the upper water inlet culvert 3 and is connected to the inner well body 1 through the jet hole group 5 at the bottom of the inner well body 1.

[0044] The outlet 7 is located at the bottom of the outer side of the outer well body 2, and the mixed water flows out of the hydraulic mixing well through the outlet 7.

[0045] In some embodiments, a guide pier 6 is provided at the bottom of the inner side of the lower water inlet culvert 4. The guide pier 6 is located below the jet hole group 5 at the bottom of the inner well body 1. It is used to change the flow direction of the water in the lower water inlet culvert 4 and, together with the jet hole group 5, make the water in the lower water inlet culvert 4 form multiple jets before entering the inner well body 1.

[0046] In this embodiment, the guide pier 6 is a cross-shaped guide pier, comprising two trapezoidal partitions that intersect in a cross shape.

[0047] In this embodiment, the height of the guide pier 6 is 0.4 times the internal height of the lower water inlet culvert 4.

[0048] In this embodiment, as Figure 3 As shown, the jet orifice group 5 includes a symmetrical array of nine orifices in a 3×3 configuration.

[0049] In some embodiments, the inner well body 1 and the outer well body 2 are made of one or more of concrete, steel bars, and engineering plastics.

[0050] In some embodiments, the elevation of the top edge of the outer well body 2 is higher than the elevation of the top edge of the inner well body 1.

[0051] In some embodiments, the elevation of the top edge of the outer well body 2 is higher than the water surface elevation of the water source drawn by the lower water intake culvert 4.

[0052] In some embodiments, the water surface elevation of the water source drawn from the upper inlet culvert 3 is lower than the water surface elevation of the water source drawn from the lower inlet culvert 4.

[0053] In some embodiments, the elevation of the top edge of the inner well body 1 is higher than the water surface elevation of the water source drawn by the upper water intake culvert 3.

[0054] Specifically, the four elevations in this embodiment are explained as follows:

[0055] Let the elevation of the upper edge of the inner well body 1 be... The elevation of the upper edge of the outer well body 2 is The water surface elevation of water source A drawn from the upper inlet culvert 3 is: The water surface elevation of water source B drawn from the lower-level inlet culvert 4 is: .

[0056] This non-powered orifice jet-type hydraulic mixing well utilizes jets to achieve a mixing effect. To ensure the mixing effect, water source B needs sufficient kinetic energy to form a complete jet when passing through the jet orifice group 5. Therefore, the water surface elevation of water source B must be higher than that of water source A, i.e. .

[0057] According to Bernoulli's equation, i.e., equation (1):

[0058] (1)

[0059] in: For flow rate; It is static pressure; For fluid density; It is the acceleration due to gravity; This is the kinetic energy correction factor; It is a constant.

[0060] exist Figure 1 In the middle section, take section S1 near water source B and section S2 along the upper edge of inner well body 1, and divide both sides of Bernoulli's equation by... Then, applying this to sections S1 and S2 respectively, without considering the head loss between sections, we have:

[0061] (2)

[0062] In equation (2), there are three terms on each side of the equation, which are position head, velocity head, and pressure head, respectively.

[0063] Generally, head loss inevitably occurs during water flow. Since the two cross-sections are close together, the head loss along the flow path is small and can be disregarded; therefore, the head loss in this process is mainly a local loss. Let's first assume the head loss is... ,Pick Secondly, since the vertical flow velocity of water at water source B is close to 0 and the static pressure is 0, then... , Furthermore, since the upper edge of the inner well body 1 is an overflow outlet, it can be approximated as... Substituting the above conditions into equation (2), we get:

[0064] (3)

[0065] Because the water needs to overflow from the upper edge of the inner well body 1, that is And head loss Therefore, from the above formula, we can obtain ,Right now .

[0066] Similarly, to ensure that water does not overflow the upper edge of the outer well body 2, applying Bernoulli's equation again yields: .

[0067] Considering the mixing effect of the two water bodies within the inner well body 1, a better mixing effect would be achieved if the flow velocity of the water drawn from the inner well body into the well body could be reduced. According to the principle of energy conservation, appropriately reducing the potential energy of water source A can effectively reduce its flow velocity within the inner well body 1. Therefore, the water surface elevation of water source A should be lower than the upper edge elevation of the inner well body 1. .

[0068] In summary, the relationship between these four elevations should be as follows:

[0069] (4)

[0070] During operation, no external power or mechanical equipment is required; only sufficient kinetic energy must be ensured in the inlet culvert, pipe, or channel. Two streams of water with different concentrations enter the inner well 1 through the upper inlet culvert 3 and the lower inlet culvert 4. Inside the well, they collide and mix, eventually forming a uniformly concentrated water body. The uniformly mixed water overflows into the outer well 2, maintaining a certain flow velocity as it exits through the outlet 7. From this point, the inflow and overflow rates automatically balance, and the entire process enters a stable operating phase, capable of continuous operation for extended periods. As the inflow gradually decreases, the water level gradually drops, and water ceases to flow from the outlet 7 until the inflow stops, leaving the inner well 1 empty, thus ending the operation.

[0071] Example 2:

[0072] This embodiment, based on Embodiment 1, provides a physical model for experimental verification. The inlet culvert of the physical model is constructed by plastic welding of gray plastic board, and the flow surface of the hybrid structure is finished with pure cement. The overall roughness of the model basically meets the needs of actual engineering. The overall model was fabricated according to relevant specifications.

[0073] In the model, the inner well body 2 is connected to the upper intake culvert 3 and the lower intake culvert 4. In this experiment, physical models of two unpowered orifice jet-type hydraulic mixing wells 8 were established. The unpowered orifice jet-type hydraulic mixing wells 8 in the two models share the same lower intake culvert 4.

[0074] In this model test, the jet hole group 5 consists of nine 0.6 m × 0.6 m water inlets arranged in a 3×3 grid, with a lateral spacing of 0.6 m and a longitudinal spacing of 0.4 m between them.

[0075] The model experiment was verified using advanced measurement instruments supplemented by traditional measurement methods:

[0076] For concentration measurement, fluorescent dye was added to the lower inlet culvert 4; Figure 4 At the eight concentration sampling points shown, the absorbance was measured using a U2800 UV-Vis spectrophotometer to calculate the content of the fluorescent agent in each sample, and thus the concentration of each sample was calculated. The concentration refers to the volume percentage of water treated in the primary enhanced high-efficiency sedimentation tank in the total mixed fluid.

[0077] For the determination of the results, in this experiment, the two types of water were mixed in equal volumes. The theoretical concentration of the sample should be 50% when completely mixed, that is, the volume of each type of water in the sample should be 1 / 2 of the total volume. After discussion with relevant experts, if the difference between the concentration of the mixed water and the theoretical concentration (50%) of complete mixing is not greater than 10%, then the hydraulic mixing effect is considered to meet the design requirements. Table 1 shows the concentration values ​​at 8 concentration sampling points in the model test.

[0078] Table 1. Sample concentration values ​​at each sampling point

[0079] Sampling points 1 2 3 4 5 6 7 8 Sample concentration (%) at each sampling point 53.30 43.87 58.75 43.87 41.56 57.40 47.25 54.00

[0080] As can be seen from the table, the maximum concentration value at the 8 concentration sampling points was 58.75%, and the minimum was 41.56%, all within the range of 50% ± 10%. It can be considered that the concentration mixing effect was good and met expectations.

[0081] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to explain the relative positional relationship and movement between components in a specific orientation. If the specific orientation changes, the directional indication will also change accordingly. These terms are used only for the convenience of describing this application and for simplifying the description, 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. Therefore, they should not be construed as limitations on this application.

[0082] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0083] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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 between two components. Those skilled in the art will understand the specific meaning of the above terms in this application based on the specific circumstances.

[0084] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A non-powered orifice jet-type hydraulic mixing well, characterized in that, include: Inner well body, outer well body, upper inlet culvert, lower inlet culvert and outlet; The inner well body is located at the center of the hydraulic mixing well, without a cover, and has a group of jet holes at the bottom; The outer well body is located on the outer periphery of the inner well body, has no cover, and forms an annular space with the inner well body; The upper water inlet culvert is located above the lower water inlet culvert and is connected to the side of the inner well body, and is used to introduce water into the inner well body; The lower intake culvert is located below the upper intake culvert and is connected to the inner well body through a group of jet holes at the bottom of the inner well body. A guide pier is provided on the inner bottom of the lower intake culvert, located below the group of jet holes at the bottom of the inner well body. This guide pier is used to change the flow direction of the water in the lower intake culvert, coordinating with the jet holes to form multiple jets of water before entering the inner well body. The guide pier is a cross-shaped guide pier, comprising two trapezoidal piers intersecting in a cross shape. The height of the guide pier is 0.4 to 0.5 times the internal height of the lower intake culvert. The outlet is located at the bottom of the outer side of the outer well body, and the mixed water flows out of the hydraulic mixing well through the outlet.

2. The non-powered orifice jet-type hydraulic mixing well according to claim 1, characterized in that, The elevation of the top edge of the outer well body is higher than the elevation of the top edge of the inner well body.

3. The non-powered orifice jet-type hydraulic mixing well according to claim 1, characterized in that, The elevation of the top edge of the outer well body is higher than the water surface elevation of the water source drawn by the lower water intake culvert.

4. The non-powered orifice jet-type hydraulic mixing well according to claim 1, characterized in that, The water surface elevation of the water source drawn from the upper water intake culvert is lower than that of the water source drawn from the lower water intake culvert.

5. The non-powered orifice jet-type hydraulic mixing well according to claim 1, characterized in that, The elevation of the top edge of the inner well body is higher than the water surface elevation of the water source drawn by the upper water intake culvert.

6. The non-powered orifice jet-type hydraulic mixing well according to claim 1, characterized in that, The jet orifice group includes multiple symmetrically arranged orifices.

7. The non-powered orifice jet-type hydraulic mixing well according to claim 1, characterized in that, The inner and outer well bodies are made of one or more of the following materials: concrete, steel reinforcement, and engineering plastics.

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