Precipitation equipment

Abstract

The utility model discloses sedimentation equipment which comprises a coagulating basin, the coagulating basin comprises a first water outlet pipeline, the first water outlet pipeline extends along a first direction, and the first direction is not perpendicular to the ground; the coagulating basin is communicated with the flocculation basin through a first water outlet pipeline; the anti-sinking pipeline extends in the first direction and is arranged on the first water outlet pipeline, the anti-sinking pipeline comprises a plurality of first air spraying parts, the first air spraying parts are arranged on the pipe wall of the anti-sinking pipeline at intervals in the first direction, and the first air spraying parts spray air towards the lower wall of the first water outlet pipeline. According to the utility model, the anti-settling pipeline is additionally arranged in the first water outlet pipeline of the coagulating basin to spray air to the lower wall of the first water outlet pipeline, so that the buoyancy of floc is increased by introduced microbubbles, the floc is not easy to settle, and the floc is effectively prevented from being deposited on the first water outlet pipeline of the coagulating basin.

Description

Technical Field

[0001] The utility model relates to the technical field of water treatment, in particular to a precipitation device. Background Art

[0002] High-density sedimentation tanks are an advanced water treatment technology used to improve the efficiency of solid-liquid separation and are commonly used in sewage treatment and drinking water purification. High-density sedimentation tanks combine traditional sedimentation tanks with the carrier flocculation technology used in coagulation processes. High-density sedimentation tanks promote the formation and settling of flocs by adding high-density insoluble particles (such as fine sand).

[0003] In the prior art, when the flocs formed in the coagulation tank are discharged into other equipment, the flocs are easily deposited at the bottom of the first outlet pipe of the coagulation tank, reducing the treatment efficiency of solid-liquid separation and the wastewater treatment effect, and the flocs deposited at the bottom of the first outlet pipe are difficult to clean. Utility Model Content

[0004] The purpose of this utility model is to solve the problem of flocs easily settling at the bottom of the first outlet pipe of the coagulation tank. This utility model provides a sedimentation device. By adding an anti-sinking pipe inside the first outlet pipe of the coagulation tank, air is sprayed toward the lower wall of the first outlet pipe. The introduced micro-bubbles increase the buoyancy of the flocs, making them less likely to settle, and effectively preventing the flocs from settling in the first outlet pipe of the coagulation tank.

[0005] In order to solve the above technical problems, the embodiment of the present utility model discloses a precipitation device, comprising:

[0006] The coagulation tank includes a first outlet pipe, wherein the first outlet pipe extends along a first direction, and the first direction is not perpendicular to the ground;

[0007] a flocculation tank, wherein the coagulation tank is connected to the flocculation tank via the first outlet pipe;

[0008] An anti-sinking pipe, the anti-sinking pipe extends along the first direction and is arranged on the first water outlet pipe. The anti-sinking pipe includes a plurality of first jet parts. Along the first direction, the plurality of first jet parts are spaced apart on the pipe wall of the anti-sinking pipe, and the plurality of first jet parts spray toward the lower wall of the first water outlet pipe.

[0009] With the above technical solution, on the one hand, the coagulation tank and the flocculation tank are directly connected via the first outlet pipe, making the overall design of the sedimentation equipment more compact and saving space. On the other hand, after the water completes coagulation in the coagulation tank, the formed flocs are discharged into the flocculation tank via the first outlet pipe. Because the first outlet pipe is equipped with an anti-sinking pipe, multiple first jets spray toward the lower wall of the first outlet pipe, allowing the introduced microbubbles to increase the buoyancy of the flocs, making them less likely to settle and preventing them from settling on the lower wall of the first outlet pipe. This ensures that the flocs can enter the flocculation tank and participate in subsequent water treatment, thereby improving the efficiency of water treatment.

[0010] According to another specific embodiment of the present invention, the embodiment of the present invention discloses a sedimentation device, wherein the first jet part includes a first jet hole and a second jet hole, and the first jet hole and the second jet hole are axially symmetrically arranged on the pipe wall of the anti-sinking pipe, the first jet hole jets along a first jet direction, and the second jet hole jets along a second jet direction, and the projections of the first jet direction and the second jet direction on the axial direction intersect to form a first angle, and the first angle is an acute angle.

[0011] By adopting the above technical solution, the first and second air jet holes are axially symmetrically arranged on the wall of the anti-sinking pipe, which can increase the air jet range to the bottom wall of the first outlet pipe and prevent flocs from settling in the dead corner of the first outlet pipe.

[0012] According to another specific embodiment of the present invention, the embodiment of the present invention discloses a sedimentation device, the anti-sinking pipe includes a plurality of second jet parts, along the first direction, each first jet part and each second jet part are adjacently spaced, the first jet part jets along the first jet direction, the second jet part jets along the second jet direction, the first jet direction and the second jet direction are not in the same plane, the projections of the first jet direction and the second jet direction on the axial direction intersect to form a first angle, and the first angle is an acute angle.

[0013] By adopting the above technical solution, each first jet portion and each second jet portion are arranged adjacent to each other at intervals, the first jet portion jets along the first jet direction, and the second jet portion jets along the second jet direction. The first jet direction and the second jet direction are not in the same plane, that is, the first jet portion only includes the first jet hole, and the second jet portion only includes the second jet hole. Compared with the technical solution in which the first jet portion includes the first jet hole and the second jet hole, when the number of jet portions is the same, the number of openings of the entire anti-sinking pipe can be reduced, which can not only save costs, but also ensure that each jet hole ejects gas at a higher pressure, further increasing the jet range to the bottom wall of the first water outlet pipe, and avoiding the deposition of flocs in the dead corner of the first water outlet pipe.

[0014] According to another specific embodiment of the present invention, the embodiment of the present invention discloses a precipitation device, wherein the first jet part includes a first jet hole, the first jet hole jets along the first jet direction, and the second jet hole jets along the second jet direction.

[0015] According to another specific embodiment of the present invention, the embodiment of the present invention discloses a sedimentation device, the anti-sinking pipe includes 4 first jet parts and 4 second jet parts, the adjacent first jet parts and the second jet parts are spaced 100 mm apart, and the apertures of the first jet hole and the second jet hole are both 5 mm.

[0016] According to another specific embodiment of the present utility model, the embodiment of the present utility model discloses a sedimentation device, the anti-sinking pipe includes a reducer, the reducer includes a large diameter end and a small diameter end, the large diameter end is connected to the other end of the anti-sinking pipe, and the small diameter end is connected to the first water outlet pipe.

[0017] With this technical solution, the smaller end connects to the first water outlet pipe, meaning the other end of the anti-sinking pipe is directly connected to the first water outlet pipe, increasing the jet range. Furthermore, due to the smaller diameter of the smaller end, the high-pressure airflow cannot be fully ejected through the other end of the anti-sinking pipe. Instead, a portion of the airflow is squeezed out through the first and second jet holes, ensuring that the high-pressure airflow can be ejected simultaneously from the first and second jet holes, as well as the third jet pipe.

[0018] According to another specific embodiment of the present invention, the embodiment of the present invention discloses a sedimentation device, the anti-sinking pipe includes a third jet pipe, the third jet pipe is connected to the small diameter end, along the second direction, the first water outlet pipe includes an upper wall and the lower wall, the third jet pipe does not spray toward the upper wall, and the second direction is perpendicular to the first direction.

[0019] By adopting the above technical solution, the third jet pipe does not spray toward the upper wall. While ensuring that the lower wall of the first water outlet pipe is sprayed, it can also spray high-pressure gas in the first direction toward the part of the first water outlet pipe extending to the flocculation tank, so that the flocs are not easily deposited in the entire first water outlet pipe.

[0020] According to another specific embodiment of the present invention, the embodiment of the present invention discloses a precipitation device, the third jet pipe includes a jet port, the radial projection of the jet port is a first straight line, the radial projection of the bottom wall of the third jet pipe is a second straight line, the first straight line and the second straight line intersect to form a second angle, and the second angle does not include an obtuse angle.

[0021] With the above technical solution, the radial projection of the jet port intersects with the first direction to form a second angle, and the second angle does not include an obtuse angle, so that the gas ejected from the jet port tends to be ejected along the first direction toward the lower wall, further ensuring that the third jet pipe does not eject gas toward the upper wall.

[0022] According to another specific embodiment of the present invention, the embodiment of the present invention discloses a sedimentation device, in which one end of the anti-sinking pipe extends out of the first water outlet pipe along the first direction for connecting with an external air source, and the other end of the anti-sinking pipe extends in the first water outlet pipe along the first direction toward the flocculation tank.

[0023] By adopting the above technical solution, there is no need to perform special leak-proof treatment on the end of the anti-sinking pipe connected to the external gas source, which can reduce costs.

[0024] According to another specific embodiment of the present invention, the embodiment of the present invention discloses a sedimentation device, the anti-sinking pipe includes a support portion, the support portion is arranged at the other end of the anti-sinking pipe, and along the second direction, the support portion is arranged between the anti-sinking pipe and the lower wall.

[0025] The above technical solution can ensure that the anti-sinking pipe is extended along the first direction, improve the stability of the anti-sinking pipe, and prevent the anti-sinking pipe from deflecting under the impact of gas, thereby affecting the anti-deposition effect.

[0026] According to another specific embodiment of the present invention, the embodiment of the present invention discloses a sedimentation device, the support part includes a first support plate and a second support plate, the first support plate and the second support plate are axially symmetrically arranged on the pipe wall of the anti-sinking pipe, and the first support plate and the second support plate intersect to form a third angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of the precipitation equipment provided in an embodiment of the present application is shown.

[0028] Figure 2 A partially enlarged view of the precipitation equipment provided in an embodiment of the present application is shown.

[0029] Figure 3 A schematic diagram of the anti-settling pipeline of the sedimentation equipment provided in an embodiment of the present application is shown.

[0030] Figure 4 A schematic diagram of the first air jet hole of the precipitation device provided in an embodiment of the present application is shown.

[0031] Figure 5 A schematic diagram of the second air jet hole of the precipitation device provided in an embodiment of the present application is shown.

[0032] Figure 6 A cross-sectional view showing an anti-settling pipe of a sedimentation device provided in an embodiment of the present application, including a first air-jet hole and a second air-jet hole.

[0033] Figure 7 A cross-sectional view showing an anti-settling pipe of a sedimentation device provided in an embodiment of the present application including a first air injection hole is shown.

[0034] Figure 8 A cross-sectional view showing an anti-settling pipe of a sedimentation device provided in an embodiment of the present application including a second air-jet hole is shown.

[0035] Figure 9 A partially enlarged view of the anti-settling pipeline of the sedimentation equipment provided in an embodiment of the present application is shown.

[0036] Figure 10 A cross-sectional view of an anti-sinking pipe including a support portion of a sedimentation device provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0037] The following is an explanation of the implementation of the present invention by means of specific specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this utility model are limited to this implementation. On the contrary, the purpose of introducing the utility model in conjunction with the implementation is to cover other options or modifications that may be extended based on the claims of the present invention. In order to provide an in-depth understanding of the present invention, the following description will contain many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0038] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0039] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in 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, be constructed and operated in a specific orientation. Therefore, they cannot be understood as a limitation on the utility model.

[0040] The terms "first", "second", etc. are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0041] In the description of the embodiments, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments can be understood according to the specific circumstances.

[0042] In order to make the purpose, technical scheme and advantages of the utility model clearer, the embodiments of the utility model will be further described in detail below with reference to the drawings.

[0043] The working principle of the sedimentation equipment provided by the embodiments of the present application mainly includes the following steps:

[0044] 1. Coagulation: Before entering the sedimentation tank, the water body usually goes through the coagulation stage, at which time chemical agents are added to make the suspended particles and dissolved substances in the water gather into larger flocs.

[0045] 2. Carrier flocculation: Inside the sedimentation tank, these flocs will combine with the pre-poured high-density medium particles, and the gravity of the medium will help to accelerate the settling process of the flocs. The presence of the medium increases the collision opportunities between particles, promotes the growth of flocs, and thus improves the settling speed.

[0046] 3. Sedimentation: As the flocs increase in size and density, they quickly settle to the bottom of the tank under the action of gravity, forming a sludge layer.

[0047] 4. Sludge backflow: In order to maintain the efficient operation of the system, part of the settled sludge will be backflowed to the front end of the treatment process to ensure that there is enough flocculant to continue participating in the coagulation process.

[0048] 5. Clear water discharge: The clear water after sedimentation is discharged from the top of the tank to achieve the purpose of purification.

[0049] The sedimentation equipment provided by the embodiments of the present application can realize efficient solid-liquid separation, and enhance the removal effect of chemical oxygen demand (COD, Chemical Oxygen Demand) and suspended solids (SS, Suspended Solids). Therefore, the sedimentation equipment provided by the embodiments of the present application can also adapt to different water quality conditions, and is suitable for various water treatment application scenarios, including municipal sewage treatment, industrial wastewater treatment and drinking water pretreatment, etc.

[0050] The sedimentation equipment provided in the embodiment of the present application can effectively solve the problem faced by the flocs when the water flows between step one and step two, that is, the flocs are deposited at the bottom of the coagulation tank and cannot enter the coagulation tank.

[0051] In some embodiments, see Figure 1 、 Figure 2 An embodiment of the present application provides a sedimentation device, comprising a coagulation tank 10, a flocculation tank 20, and an anti-settling pipe 30. Exemplarily, the coagulation tank 10 comprises a first outlet pipe 11, which extends along a first direction X. The coagulation tank 10 and the flocculation tank 20 are connected via the first outlet pipe 11, and the first direction X is not perpendicular to the ground. Exemplarily, along a second direction Y, the first outlet pipe 11 comprises an upper wall 111 and a lower wall 112, the first direction X is parallel to the ground, and the second direction Y is perpendicular to the ground. In this case, flocs formed in the coagulation tank 10 are more easily deposited on the lower wall 112 of the first outlet pipe under the action of gravity.

[0052] Exemplarily, the coagulation tank 10 also includes a second outlet pipe 12, which extends along the second direction Y. The second outlet pipe 12 is connected to the first outlet pipe 11, and the flocs formed in the coagulation tank 10 flow into the coagulation tank 20 through the second outlet pipe 12 and the first outlet pipe 11 in sequence.

[0053] For example, see Figure 1 、 Figure 2 、 Figure 3 The anti-sinking pipe 30 extends along the first direction X and is arranged on the first water outlet pipe 11. The anti-sinking pipe 30 includes a plurality of first jet parts 31. Along the first direction X, the plurality of first jet parts 31 are spaced apart on the pipe wall 301 of the anti-sinking pipe. The plurality of first jet parts 31 spray toward the lower wall 112 of the first water outlet pipe.

[0054] By adopting the above technical solution, on the one hand, the coagulation tank 10 and the flocculation tank 20 are directly connected through the first outlet pipe 11, making the overall design of the sedimentation equipment more compact and saving space. On the other hand, after the water body completes coagulation in the coagulation tank 10, the flocs formed are discharged into the flocculation tank 20 through the first outlet pipe 11. Since the first outlet pipe 11 is provided with an anti-sinking pipe 30, multiple first jet parts 31 spray toward the lower wall 112 of the first outlet pipe, so that the introduced microbubbles increase the buoyancy of the flocs, making it difficult for the flocs to settle, and preventing the flocs from being deposited on the lower wall 112 of the first outlet pipe, ensuring that the flocs can enter the flocculation tank 20 to participate in subsequent water treatment, thereby improving the efficiency of water treatment. The anti-sinking pipe 30 provided in the embodiment of the present application has the advantages of easy access to accessories, fast assembly, few accessories, simple operation, and no need for an external power supply. It can solve the problem of floc deposition in the first outlet pipe 11 at the bottom of the coagulation tank at a relatively low cost.

[0055] In some embodiments, see Figure 2 、 Figure 3 Along the first direction X, the anti-sinking pipe 30 includes a first end 302 and a second end 303. The first end 302 of the anti-sinking pipe 30 extends from the first outlet pipe 11 for communication with an external air source, and the second end 303 of the anti-sinking pipe 30 extends within the first outlet pipe 11 along the first direction X toward the flocculation tank 20. Exemplarily, the anti-sinking pipe 30 is welded to the first outlet pipe 11, and the first end 302 includes a connecting flange 3021 for connection to an air pipe of an external air source.

[0056] In some embodiments, see Figure 4 、 Figure 5 、 Figure 6 Combined with Figure 3 The first air-jet portion 31 includes a first air-jet hole 311 and a second air-jet hole 321. The first air-jet hole 311 and the second air-jet hole 321 are axially symmetrically arranged on the wall 301 of the anti-sinking pipe. The first air-jet hole 311 ejects air along a first ejection direction M, and the second air-jet hole 321 ejects air along a second ejection direction N. The axial projections of the first ejection direction M and the second ejection direction N intersect to form a first angle a, which is an acute angle. Exemplarily, the axial direction coincides with the first direction X. Exemplarily, eight first air-jet portions 31 are spaced apart in the first direction X in the anti-sinking pipe 30. This embodiment of the present application does not limit the number of first air-jet portions 31; for example, the number may be two, three, four, five, nine, or ten.

[0057] In some embodiments, see Figure 4 、 Figure 5 、 Figure 6 Combined with Figure 3 The anti-sinking pipe 30 includes a plurality of second jet portions 32. Along the first direction X, each first jet portion 31 and each second jet portion 32 are adjacently spaced. The first jet portion 31 jets along a first jet direction M, and the second jet portion 32 jets along a second jet direction N. The projections of the first jet direction M and the second jet direction N in the axial direction intersect to form a first angle a. The first angle a is an acute angle. For example, the first jet portion 31 includes a first jet hole 311 (such as Figure 7 As shown), the second jet portion 32 includes a second jet hole 321 (as shown Figure 8 As shown in FIG, the first jet hole 311 jets air along a first jet direction M, and the second jet hole 321 jets air along a second jet direction N.

[0058] For example, when the first air jet portion 31 includes the first air jet hole 311 and the second air jet portion 32 includes the second air jet hole 321, the first air jet direction M and the second air jet direction N are not in the same plane. When both the first air jet portion 31 and the second air jet portion 32 include the first air jet hole 311 and the second air jet hole 321, the first air jet direction M and the second air jet direction N are in the same plane, and the axial projections of the first air jet hole 311 of the first air jet portion 31 and the first air jet hole 311 of the second air jet portion 32 coincide with each other. The axial projections of the second air jet hole 321 of the first air jet portion 31 and the second air jet hole 321 of the second air jet portion 32 coincide with each other.

[0059] Exemplarily, the first angle a includes any one of 45° to 60°, and the first angle a includes 45° and 60°. It can be understood that the embodiment of the present application does not limit the size of the first angle a. For example, it can also be 30°, 47.1°, 50°, 70° and other values.

[0060] In some embodiments, the anti-sinking pipe 30 includes four first air jets 31 and four second air jets 32. Adjacent first air jets 31 and second air jets 32 are spaced 100 mm apart. The diameters of the first air jet holes 311 and second air jet holes 321 are both 5 mm. It is understood that the present embodiment does not limit the number of first air jets 31 and second air jet holes 32; for example, the number of first air jets 31 and second air jet holes 32 may be 2, 3, 5, 6, 7, 8, or 9, respectively. The present embodiment also does not limit the spacing between the first air jets 31 and second air jets 32; for example, the spacing may be 60 mm, 70 mm, 80 mm, 90 mm, or 110 mm. The present embodiment also does not limit the diameters of the first air jet holes 311 and second air jet holes 321; for example, the spacing may be 2 mm, 3 mm, 4 mm, or 6 mm, etc.

[0061] In some embodiments, see Figure 9 Combined with Figure 2 、 Figure 3 The anti-sinking pipe 30 includes a reducer 33, which has a large-diameter end 331 and a small-diameter end 332. The large-diameter end 331 communicates with the other end of the anti-sinking pipe 30, while the small-diameter end 332 communicates with the first outlet pipe 11. The reducer 33, also known as a reducer, is a chemical pipe fitting that can connect two pipes of different diameters. The large-diameter end 331 is larger than the small-diameter end 332. Due to the smaller diameter of the small-diameter end 332, the high-pressure airflow cannot be fully ejected through the other end of the anti-sinking pipe 30. A portion of the airflow is squeezed out through the first and second air jet holes 311 and 321.

[0062] In some embodiments, see Figure 9 Combined with Figure 2 、 Figure 3The anti-sinking pipe 30 includes a third air jet 34, which is connected to the smaller diameter end 332. The third air jet 34 does not spray toward the upper wall 111. The second direction Y is perpendicular to the first direction X. Exemplarily, the third air jet 34 includes an air jet port 341. The radial projection of the air jet port 341 forms a first straight line. The radial projection of the bottom wall 342 of the third air jet 34 forms a second straight line. The first and second straight lines intersect to form a second angle b, which does not include an obtuse angle. Exemplarily, the radial direction coincides with the second direction Y. Exemplarily, the second angle b includes an acute angle, and the radial projection of the third air jet 34 forms a right-angled trapezoid, ensuring that the third air jet 34 does not spray toward the upper wall 111 of the first outlet pipe 11. It is understood that the embodiment of the present application does not limit the value of the second angle b; for example, it can be 30°, 40°, 45°, 50°, 80°, 85.5°, 90°, or other values.

[0063] In some embodiments, see Figure 10 Combined with Figure 2 、 Figure 3 The anti-sinking pipe 30 includes a support portion 35 disposed at the second end 303 of the anti-sinking pipe and extending between the anti-sinking pipe 30 and the lower wall 112 along the second direction Y. For example, the first end 302 of the anti-sinking pipe is welded to the first outlet pipe 11, and the second end 303 is supported by the support portion 35, ensuring that the anti-sinking pipe 30 can extend along the first direction X. The support portion 35 includes a first support plate 351 and a second support plate 352, which are axially symmetrically disposed on the anti-sinking pipe wall 301. The first support plate 351 and the second support plate 352 intersect to form a third angle c. Exemplarily, the first support plate 351 and the second support plate 352 are welded to the upper wall 111 or the lower wall 112 of the first water outlet pipe to fix the second end 303 of the anti-sinking pipe. It can be understood that the embodiment of the present application does not limit the size of the third angle c, for example, it can be 0°, 30°, 40°, 45°, 50°, 80°, 90°, 100°, 121.5°, 180° and other values.

[0064] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above description is provided to further illustrate the present invention in conjunction with specific embodiments, and that the present invention should not be construed as being limited to these descriptions. Those skilled in the art may make various changes in form and detail, including simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A precipitation device, characterized in that: include: The coagulation tank includes a first outlet pipe, wherein the first outlet pipe extends along a first direction, and the first direction is not perpendicular to the ground; a flocculation tank, wherein the coagulation tank is connected to the flocculation tank via the first outlet pipe; An anti-sinking pipe, the anti-sinking pipe extends along the first direction and is arranged on the first water outlet pipe. The anti-sinking pipe includes a plurality of first jet parts. Along the first direction, the plurality of first jet parts are spaced apart on the pipe wall of the anti-sinking pipe, and the plurality of first jet parts spray toward the lower wall of the first water outlet pipe.

2. The precipitation device according to claim 1, characterized in that The first jet portion includes a first jet hole and a second jet hole, which are axially symmetrically arranged on the wall of the anti-sinking pipe. The first jet hole jets along a first jet direction, and the second jet hole jets along a second jet direction. The projections of the first jet direction and the second jet direction on the axial direction intersect to form a first angle, and the first angle is an acute angle.

3. The precipitation device according to claim 1, characterized in that The anti-sinking pipe includes multiple second jet parts. Along the first direction, each first jet part and each second jet part are adjacently spaced apart. The first jet part jets along a first jet direction, and the second jet part jets along a second jet direction. The first jet direction and the second jet direction are not in the same plane. The projections of the first jet direction and the second jet direction in the axial direction intersect to form a first angle, and the first angle is an acute angle.

4. The precipitation device according to claim 3, characterized in that The first jet portion includes a first jet hole, and the second jet portion includes a second jet hole. The first jet hole jets along the first jet direction, and the second jet hole jets along the second jet direction.

5. The precipitation device according to claim 4, characterized in that The anti-sinking pipe includes four first air-jet parts and four second air-jet parts, the interval between adjacent first air-jet parts and second air-jet parts is 100 mm, and the apertures of the first air-jet holes and the second air-jet holes are both 5 mm.

6. The precipitation device according to claim 5, characterized in that The anti-sinking pipe includes a reducer, and the reducer includes a large diameter end and a small diameter end. The large diameter end is connected to the other end of the anti-sinking pipe, and the small diameter end is connected to the first water outlet pipe.

7. The precipitation device according to claim 6, characterized in that The anti-sinking pipe includes a third air injection pipe, which is connected to the small-diameter end. Along the second direction, the first water outlet pipe includes an upper wall and the lower wall. The third air injection pipe does not spray toward the upper wall. The second direction is perpendicular to the first direction.

8. The precipitation device according to claim 7, characterized in that The third air injection pipe includes an air injection port, the radial projection of the air injection port is a first straight line, the radial projection of the bottom wall of the third air injection pipe is a second straight line, the first straight line and the second straight line intersect to form a second angle, and the second angle does not include an obtuse angle.

9. The precipitation device according to claim 1, characterized in that Along the first direction, one end of the anti-sinking pipe extends out of the first outlet pipe for communicating with an external air source, and the other end of the anti-sinking pipe extends in the first outlet pipe along the first direction toward the flocculation tank.

10. The precipitation device according to claim 9, characterized in that The anti-sinking pipe includes a support portion, which is provided at the other end of the anti-sinking pipe. Along the second direction, the support portion is provided between the anti-sinking pipe and the lower wall.

11. The precipitation device according to claim 10, characterized in that The support portion includes a first support plate and a second support plate. The first support plate and the second support plate are axially symmetrically arranged on the pipe wall of the anti-sinking pipe. The first support plate and the second support plate intersect to form a third angle.

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