Water treatment reactor annular perforated pipe distributor

Abstract

This invention relates to the field of water treatment technology, specifically to a perforated pipe water distributor for a water treatment reactor. It includes two sets of symmetrically distributed lateral narrow-side perforated main pipes and transverse perforated main pipes. The two sets of lateral narrow-side perforated main pipes and transverse perforated main pipes are fixedly connected to form a perforated distribution surface. A water distribution end inlet pipe is vertically installed at the center of each of the two lateral narrow-side perforated main pipes. Due to the reverse pressure gradient effect of the fluid gradient at the junction of the layered perforated branch pipes in the water distribution section and the variable-diameter chamfer on the sinking side, the main fluid stream detaches from the perforated side wall on the water distribution side and forms a vortex. Furthermore, influenced by the variable-diameter outlet cross-section of the conical water distribution sleeve, the water flow ultimately exhibits an increased outlet diameter and decreased fluid velocity when passing through the conical water distribution sleeve cross-section. This allows for sufficient and stable flow towards the outlet perforation on the end water distribution side, where no variable-diameter water distribution compensation component is installed.

Description

Technical Field

[0001] This invention relates to the field of water treatment technology, specifically to a perforated annular tube water distributor for a water treatment reactor. Background Technology

[0002] The water distribution structure of existing water pollution treatment reactors mainly uses single pipes or branched arrangements. This arrangement makes it easy for the water flow to be affected by the superposition of frictional resistance and local resistance along the flow path. This results in the outflow head of the near-end water distribution hole being much larger than that of the far end, forming a nonlinear distribution with a large flow rate near the end and a small flow rate far the end. This flow deviation phenomenon directly causes the load distribution in the water distribution area to deviate significantly from the design value, i.e., some areas have excessively high hydraulic loads while others have excessively low loads. This directly weakens the operational stability of subsequent treatment units. Furthermore, the size of the water distribution hole diameter and the opening angle are not hydraulically verified, which easily leads to jet concentration or dead zones near the hole opening. Excessively high local flow velocities will aggravate the impact on the packing layer or sludge layer, causing short-circuiting, channeling, or even media breakage. Conversely, excessively low local flow velocities can easily lead to suspended solids deposition, uneven biofilm activity, or water distribution blind zones. This not only increases the ineffective hydraulic retention time but also directly reduces the stability of subsequent treatment in the reactor. Summary of the Invention

[0003] To address the problems in the prior art, the present invention provides a perforated annular pipe water distributor for a water treatment reactor.

[0004] The technical solution adopted by this invention to solve its technical problem is: a water treatment reactor annular perforated pipe water distributor, comprising two sets of symmetrically distributed lateral narrow-side annular main pipes and transverse annular main pipes. The two sets of lateral narrow-side annular main pipes and transverse annular main pipes are fixedly connected to form an annular distribution surface. A water distribution end inlet pipe is vertically installed at the center position of the two lateral narrow-side annular main pipes. The output end of the water distribution end inlet pipe is connected to the transverse annular main pipe. Several sets of stratified annular supports are arranged along the vertical distribution path of the water distribution end inlet pipe. The water distribution layered annular branch pipes are arranged at equal intervals. Several sets of water distribution side output perforations are arranged laterally on the inner side of the water distribution layered annular branch pipes. After the water inlet pipe of the water distribution end outputs fluid, the fluid is diverted to multiple directions after changing diameter through the water distribution layered annular branch pipes arranged on the inner side of the lateral narrow-side annular main pipe and the transverse annular main pipe. At least two of the water distribution side output perforations are equipped with diameter-changing water distribution compensation components. The diameter-changing water distribution compensation components are used to balance the flow resistance loss when the fluid is directly output from each of the water distribution side output perforations after the diameter change.

[0005] Preferably, the diameter of the lateral narrow-side annular main pipe and the transverse annular main pipe is 1.5-2.5 times that of the water distribution layered annular branch pipe, wherein the spacing between the water distribution layered annular branch pipes adjacent to the lateral narrow-side annular main pipe and the transverse annular main pipe is 450-550mm.

[0006] Preferably, the spacing between the layered annular branch pipes of the water distribution section is 700-800mm, and a variable diameter interval ring mark used to mark the output perforated dividing section of the water distribution side is fixedly connected to the outer periphery of the layered annular branch pipes of the water distribution section.

[0007] Preferably, the variable-diameter water distribution compensation component includes a conical water distribution sleeve, a fluid spacer plug, and a downward-facing variable-diameter chamfer. The fluid spacer plug is fitted onto the top of the conical water distribution sleeve, and the downward-facing variable-diameter chamfer is integrally formed with the conical water distribution sleeve. The fluid spacer plug is located inside the water distribution side output perforation, and the length of the conical water distribution sleeve is 2.5-3.5 times the diameter of the cavity position at the center point of the water distribution side output perforation.

[0008] Preferably, the conical water distribution sleeve and the side wall of the water distribution side output perforation form a fluid sinking cavity, and the inner side of the fluid sinking cavity is bonded and fixed by filling with an adhesive sealing layer.

[0009] Preferably, the diameters of the top and bottom openings of the water distribution side output perforation are both larger than the diameter of the center point through the cavity, and the top and bottom openings of the water distribution side output perforation are both recessed toward the fluid sinking cavity.

[0010] Preferably, the inner side of the conical water distribution jacket is coated with a 50-70µm Teflon flow-guiding coating.

[0011] Preferably, the water distribution layered annular branch pipe is fixedly connected to its adjacent lateral narrow-side annular main pipe or the transverse annular main pipe.

[0012] Compared to existing technologies, the beneficial effects of this invention are as follows: When the fluid enters through the water inlet pipe at the water distribution end, it is first distributed to the lateral narrow-side annular main pipe and the transverse annular main pipe located at its top and bottom, and then evenly distributed to the layered annular branch pipes of each water distribution section. When the water flow reaches the location of each layered annular branch pipe, it preferentially exits through the water distribution side output perforation equipped with a variable diameter water distribution compensation component. During the output, the fluid passes through the reverse pressure gradient effect of the fluid sinking cavity formed at the junction of the layered annular branch pipe of the water distribution section and the variable diameter chamfer on the sinking side. The main fluid flow leaves the sidewall of the water distribution side output perforation and forms a vortex, which causes the head loss coefficient to increase rapidly. Furthermore, due to the water... When the water flows through, the initial flow position and output position are guided by the concave shape of the upper and lower ends of the cavity through the center point. The variable diameter outlet cross-section of the tapered water distribution sleeve affects the water flow when it finally passes through the tapered water distribution sleeve cross-section, resulting in an increased outlet diameter and decreased fluid velocity. This directly weakens the outflow velocity of the water distribution side output perforation near the lateral narrow-side ring main pipe and the transverse ring main pipe, allowing the water head to flow fully and stably towards the end water distribution side output perforation without the variable diameter water distribution compensation component. This achieves the purpose of balancing the resistance between the branch pipes and making the water distribution more linear, avoiding the formation of jet concentration or dead zones near the output hole. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 This is a structural diagram of an annular perforated pipe water distributor for a water treatment reactor according to the present invention.

[0015] Figure 2 This is a schematic diagram of the structure of the layered annular branch pipe in the annular perforated pipe water distributor of a water treatment reactor according to the present invention.

[0016] Figure 3 This is a cross-sectional view of the layered annular branch pipe in the annular perforated pipe water distributor of a water treatment reactor according to the present invention.

[0017] Figure 4 This is a front cross-sectional view of the layered annular branch pipe in the annular perforated pipe water distributor of a water treatment reactor according to the present invention.

[0018] Figure 5 This is a schematic diagram of one embodiment of the present invention.

[0019] In the diagram: 1. Lateral narrow-side ring-type main pipe; 2. Transverse ring-type main pipe; 3. Water inlet pipe at the water distribution end; 4. Layered ring branch pipe in the water distribution area; 41. Variable diameter interval ring mark; 5. Water distribution side output perforation; 51. Fluid sinking cavity; 52. Adhesive sealing filling layer; 53. Center point passage cavity; 6. Variable diameter water distribution compensation component; 61. Conical water distribution sleeve; 62. Fluid interval cavity plug; 63. Sinking side variable diameter chamfer; 64. Teflon flow guiding coating. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments. Example

[0021] like Figures 1-4 As shown, the water treatment reactor annular perforated pipe water distributor of the present invention includes two sets of symmetrically distributed lateral narrow-side annular main pipes 1 and transverse annular main pipes 2. The two sets of lateral narrow-side annular main pipes 1 and transverse annular main pipes 2 are fixedly connected to form an annular distribution surface. A water distribution end inlet pipe 3 is vertically installed at the center of the two lateral narrow-side annular main pipes 1. The output end of the water distribution end inlet pipe 3 is connected to the transverse annular main pipe 2. Several sets of layered annular branch pipes 4 are arranged along the vertical distribution path of the water distribution end inlet pipe 3. The water distribution layered annular branch pipes 4 are arranged at equal intervals. Several sets of water distribution side output perforations 5 are arranged laterally inside the water distribution layered annular branch pipes 4. After the water distribution end inlet pipe 3 outputs fluid, the fluid is diverted to multiple directions after diameter change through the water distribution layered annular branch pipes 4 arranged inside the lateral narrow-side annular main pipe 1 and the transverse annular main pipe 2. At least two water distribution side output perforations 5 are equipped with diameter-changing water distribution compensation components 6. The diameter-changing water distribution compensation components 6 are used to balance the flow resistance loss when each water distribution side output perforation 5 directly outputs fluid after diameter change.

[0022] In this embodiment, the resistance loss generated when the fluid is distributed to each orifice by the layered annular branch pipe 4 of the water distribution section includes two parts: one is the frictional resistance loss caused by the friction between the fluid and the inner wall of the layered annular branch pipe 4, and the other is the local resistance loss caused by the fluid flowing through the water distribution side output perforation 5. In the prior art, although the resistance balance effect can be achieved by changing the diameter of each pipe section at the output end of the pipe distributor, it will directly cause a sudden change in the flow pattern of the water. To solve this problem, this solution achieves water distribution balance by assembling a variable diameter water distribution compensation component 6 at the water distribution side output perforation 5 opened near the lateral narrow-side annular main pipe 1 and the transverse annular main pipe 2 of the layered annular branch pipe 4. The specific process is as follows: When the water inlet pipe 3 is injected with water from an external pump, the fluid first distributes to the lateral narrow-side annular main pipe 1 and the transverse annular main pipe 2 located at its top and bottom, and then evenly distributes to the layered annular branch pipes 4 of each water distribution section. When the water reaches the location of the layered annular branch pipes 4 of each water distribution section, it preferentially exits through the water distribution side output perforation 5, which is equipped with a variable diameter water distribution compensation component 6. During the output, the fluid passes through the reverse pressure gradient of the fluid sinking cavity 51 formed at the junction of the layered annular branch pipe 4 of the water distribution section and the sinking side variable diameter chamfer 63. The main fluid flows away from the sidewall of the water distribution side output perforation 5 and forms a vortex, which causes the head loss coefficient to increase rapidly. When the water flows through the water distribution side output perforation 5, the initial flow position and output position are guided by the concave shape of the upper and lower ends of the cavity 53 through the center point. The variable diameter outlet section of the conical water distribution sleeve 61 affects the water flow, causing the water flow to form an increased outlet diameter and decreased fluid velocity when it finally passes through the conical water distribution sleeve 61 section. This directly weakens the outflow velocity of the water distribution side output perforation 5 near the lateral narrow-side ring main pipe 1 and the transverse ring main pipe 2, so that the water head can flow fully and stably towards the end water distribution side output perforation 5 without the variable diameter water distribution compensation component 6 installed. This achieves the purpose of balancing the resistance between the branches and making the water distribution more linear, avoiding the formation of jet concentration or dead zones near the output hole.

[0023] In one optional embodiment of this example, the diameters of the lateral narrow-side annular main pipe 1 and the transverse annular main pipe 2 are 1.5-2.5 times that of the water distribution layered annular branch pipe 4, wherein the spacing between the water distribution layered annular branch pipe 4 on the adjacent side of the lateral narrow-side annular main pipe 1 and the transverse annular main pipe 2 is 450-550mm.

[0024] In this embodiment, the lateral narrow-side ring-type main pipe 1, the transverse ring-type main pipe 2, the water distribution end inlet pipe 3, and the water distribution layered ring branch pipe 4 are all made of UPVC material, whose corrosion resistance meets the requirements of the water treatment reactor.

[0025] In one optional embodiment of this example, the spacing between the water distribution layered annular branch pipes 4 is 700-800mm, and a variable diameter interval ring 41 for marking the water distribution side output perforation 5 segment is fixedly connected to the outer periphery of the water distribution layered annular branch pipe 4.

[0026] In one optional embodiment of this example, the variable diameter water distribution compensation component 6 includes a conical water distribution sleeve 61, a fluid spacer 62, and a downward-facing variable diameter chamfer 63. The fluid spacer 62 is sleeved on the top of the conical water distribution sleeve 61, and the downward-facing variable diameter chamfer 63 is integrally formed with the conical water distribution sleeve 61. The fluid spacer 62 is located inside the water distribution side output perforation 5, and the length of the conical water distribution sleeve 61 is 2.5-3.5 times the diameter of the cavity 53 through which the center point of the water distribution side output perforation 5 is located.

[0027] In one optional embodiment of this example, a fluid sinking cavity 51 is formed between the conical water distribution sleeve 61 and the side wall of the water distribution side output perforation 5. The fluid sinking cavity 51 is bonded and fixed by filling with an adhesive sealing filling layer 52. The adhesive filling layer 52 can be made of epoxy resin. The conical water distribution sleeve 61 and the water distribution layered annular branch pipe 4 can be fixed by a pipe connector. After fixing, the adhesive filling layer 52 performs secondary bonding and sealing.

[0028] In one optional embodiment of this example, the top and bottom diameters of the water distribution side output perforation 5 are both larger than the diameter of the central point through cavity 53, and the top and bottom openings of the water distribution side output perforation 5 are both recessed towards the fluid sinking cavity 51. When the fluid flows through this location, a fluid sinking cavity 51 is formed at the junction of the water distribution layered annular branch pipe 4 and the sinking side variable diameter tangent 63. The 5 has large ends and a small middle section, and is recessed inward to form a flow channel. This allows the fluid velocity to increase and the pressure to decrease when flowing through the central through cavity 53. Subsequently, when entering the enlarged outlet section, the velocity drops sharply and the pressure rises, forming a reverse pressure gradient. This reverse pressure gradient guides the main fluid stream away from the sidewall of the water distribution perforation 5 and generates tiny vortices, increasing the head loss coefficient and thus consuming the excess energy of the near-end water distribution hole. When the fluid passes through this structure, the energy loss caused by the vortices and cross-sectional changes significantly weakens the effective outflow head of the near-end water distribution hole, reducing its outflow velocity. The water head energy can be squeezed towards the end 5 where 6 is not installed to achieve flow, realizing linear and uniform water distribution. At the same time, the structure of 5 with a large top and bottom diameter, a small center, and an overall concave shape can further provide installation space for the conical water distribution shell 61, forming a variable diameter outlet section from the center through the cavity 53 to the conical water distribution shell 61. When the water flows through the gradually expanding section formed by 5, the outlet diameter increases and the fluid velocity decreases, which can further avoid the impact of high-speed jets on the packing or sludge layer in the reactor, prevent short-circuiting and channeling phenomena, and also facilitate the uniform distribution of suspended solids.

[0029] In an optional embodiment of this example, the inner side of the conical water distribution jacket 61 is coated with a 50-70µm Teflon flow-guiding coating 64.

[0030] In one optional embodiment of this example, the water distribution layered annular branch pipe 4 is fixedly connected to its adjacent lateral narrow-side annular main pipe 1 or the transverse annular main pipe 2. Example

[0031] Please refer to the accompanying drawings in the instruction manual. Figure 5In one embodiment of the present invention, a perforated annular water distributor for a water treatment reactor is provided. In this embodiment, a preferred scheme is provided, comprising two symmetrically distributed lateral narrow-side annular main pipes 1 and transverse annular main pipes 2. The two sets of lateral narrow-side annular main pipes 1 and transverse annular main pipes 2 are fixedly connected to form an annular distribution surface. A water distribution end inlet pipe 3 is vertically installed at the center of the two lateral narrow-side annular main pipes 1. The output end of the water distribution end inlet pipe 3 is connected to the transverse annular main pipe 2. A plurality of [unclear text - possibly related to water distribution end inlet pipes] are arranged along the vertical distribution path of the water distribution end inlet pipe 3. The water distribution layered annular branch pipes 4 are arranged at equal intervals. Several sets of water distribution side output perforations 5 are arranged laterally inside the water distribution layered annular branch pipes 4. At least two water distribution side output perforations 5 are installed with variable diameter water distribution compensation components 6 inside. The water distribution end inlet pipe 3 is vertically fixed at the center position of the filter tank where the water distributor is installed. The lateral narrow-side annular main pipe 1, the transverse annular main pipe 2 and the water distribution layered annular branch pipes 4 are connected to the water distribution end inlet pipe 3 through flanges. The water distribution side output perforations 5 are horizontally set 0.5m above the bottom of the filter tank.

[0032] In one optional embodiment of this example, the diameters of the lateral narrow-side annular main pipe 1 and the transverse annular main pipe 2 are 2.5 times that of the water distribution layered annular branch pipe 4, wherein the interval between the water distribution layered annular branch pipe 4 on the adjacent side of the lateral narrow-side annular main pipe 1 and the transverse annular main pipe 2 is 550mm.

[0033] In one optional embodiment of this example, the spacing between the water distribution layered annular branch pipes 4 is 800mm, and a variable diameter interval ring 41 for marking the water distribution side output perforation 5 segment is fixedly connected to the outer periphery of the water distribution layered annular branch pipe 4.

[0034] In one optional embodiment of this example, the variable diameter water distribution compensation component 6 includes a conical water distribution sleeve 61, a fluid spacer plug 62, and a downward-facing variable diameter chamfer 63. The fluid spacer plug 62 is sleeved on the top of the conical water distribution sleeve 61, and the downward-facing variable diameter chamfer 63 is integrally formed with the conical water distribution sleeve 61. The fluid spacer plug 62 is located inside the water distribution side output perforation 5, and the length of the conical water distribution sleeve 61 is 2.5 times the diameter of the cavity 53 at the center point of the water distribution side output perforation 5.

[0035] In one optional embodiment of this example, the inner side of the conical water distribution jacket 61 is coated with a 70µm Teflon flow-guiding coating 64.

[0036] In this embodiment, using the above-described technical solution, three sets of water distribution-side output perforations 5 located near the laterally narrow-side annular main pipe 1 and the transverse annular main pipe 2 in the water distribution layered annular branch pipe 4 at both ends of the water distribution end inlet pipe 3 are selected as the installation ends of the variable-diameter water distribution compensation component 6. Then, a flow meter installed at the output port of the water distribution-side output perforation 5 can calculate the difference in flow rate between the water distribution-side output perforation 5 without the variable-diameter water distribution compensation component 6 and the water distribution-side output perforation 5 with the variable-diameter water distribution compensation component 6 during water distribution. The difference is that when the fluid enters the water distribution layered annular branch pipe 4 through the lateral narrow-side annular main pipe 1 and the transverse annular main pipe 2, the pressure change inside the pipe is mainly affected by the pressure reduction caused by the frictional resistance of the pipe wall of the water distribution layered annular branch pipe 4. As the mainstream flows out of the orifice, the velocity head decreases, while the resistance loss generated by the water distribution layered annular branch pipe 4 that does not pass through the water flow pipe section decreases. The flow rate of the water distribution side output perforation 5 without the variable diameter water distribution compensation component 6 can gradually increase, so as to achieve the uniformity of the water output of each water distribution side output perforation 5 when balancing water distribution.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A perforated annular pipe water distributor for a water treatment reactor, characterized in that: It includes two sets of symmetrically distributed lateral narrow-side ring-shaped main pipes (1) and transverse ring-shaped main pipes (2). The two sets of lateral narrow-side ring-shaped main pipes (1) and transverse ring-shaped main pipes (2) are fixedly connected to form a ring distribution surface. A water distribution end inlet pipe (3) is vertically installed at the center of the two lateral narrow-side ring-shaped main pipes (1). The output end of the water distribution end inlet pipe (3) is connected to the transverse ring-shaped main pipe (2). Several sets of water distribution layered ring-shaped branch pipes (4) are arranged along the vertical distribution path of the water distribution end inlet pipe (3). The water distribution layered ring-shaped branch pipes (4) are evenly spaced. The water distribution layered annular branch pipe (4) is arranged with several sets of water distribution side output perforations (5) arranged laterally inside. After the water distribution end inlet pipe (3) outputs fluid, the fluid is diverted to multiple directions after diameter change through the water distribution layered annular branch pipe (4) arranged inside the lateral narrow side annular main pipe (1) and the transverse annular main pipe (2). At least two of the water distribution side output perforations (5) are equipped with diameter-changing water distribution compensation components (6). The diameter-changing water distribution compensation components (6) are used to balance the flow resistance loss when each of the water distribution side output perforations (5) directly outputs fluid after diameter change.

2. The water treatment reactor annular perforated pipe water distributor according to claim 1, characterized in that: The diameters of the lateral narrow-side ring-type main pipe (1) and the transverse ring-type main pipe (2) are 1.5-2.5 times that of the water distribution layered ring branch pipe (4), wherein the spacing between the water distribution layered ring branch pipe (4) on the adjacent side of the lateral narrow-side ring-type main pipe (1) and the transverse ring-type main pipe (2) is 450-550mm.

3. The water treatment reactor annular perforated pipe water distributor according to claim 2, characterized in that: The spacing between the water distribution layered annular branch pipes (4) is 700-800mm. A variable diameter interval ring (41) is fixedly connected to the outer periphery of the water distribution layered annular branch pipes (4) to mark the dividing segments of the water distribution side output perforation (5).

4. The annular perforated pipe water distributor for a water treatment reactor according to claim 3, characterized in that: The variable diameter water distribution compensation component (6) includes a conical water distribution sleeve (61), a fluid spacer plug (62), and a downward-facing variable diameter chamfer (63). The fluid spacer plug (62) is fitted on the top of the conical water distribution sleeve (61). The downward-facing variable diameter chamfer (63) is integrally formed with the conical water distribution sleeve (61). The fluid spacer plug (62) is located inside the water distribution side output perforation (5). The length of the conical water distribution sleeve (61) is 2.5-3.5 times the diameter of the center point of the water distribution side output perforation (5) through the cavity (53).

5. The water treatment reactor annular perforated pipe water distributor according to claim 4, characterized in that: The conical water distribution sleeve (61) and the side wall of the water distribution side output perforation (5) form a fluid sinking cavity (51), and the inner side of the fluid sinking cavity (51) is bonded and fixed by filling with an adhesive sealing filler layer (52).

6. The water treatment reactor annular perforated pipe water distributor according to claim 5, characterized in that: The diameters of the top and bottom openings of the water distribution side output perforation (5) are both larger than the diameter of the center point through cavity (53), and the top and bottom openings of the water distribution side output perforation (5) are recessed toward the fluid sinking cavity (51).

7. A perforated pipe water distributor for a water treatment reactor according to claim 6, characterized in that: The inner side of the conical water distribution jacket (61) is coated with a 50-70µm Teflon flow-guiding coating (64).

8. The annular perforated pipe water distributor for a water treatment reactor according to claim 1, characterized in that: The water distribution layered annular branch pipe (4) is fixedly connected to the adjacent lateral narrow-side annular main pipe (1) or the transverse annular main pipe (2).

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