Radial flow type uniform water inlet immersed hollow fiber membrane tank

Abstract

The utility model discloses a radial-flow uniform water inlet immersed hollow fiber membrane tank which comprises a water inlet pipe, a water inlet well, an annular water collecting tank, a flow baffle, a hollow fiber membrane assembly, a water outlet pipe, a sludge discharge pipe and a tank body, the outer side face of the pool body is provided with a water inlet well, the bottom of the water inlet well is connected with a water inlet pipe, the top of the water inlet pipe is connected with an annular water collecting groove, the annular water collecting groove and a flow baffle are arranged on the inner wall of the pool body in a surrounding mode, the bottom of the pool body is provided with an inclined face inclining towards the center, and the center is provided with a groove. A downward water inlet channel is formed by the flow baffle and the inner wall of the tank body; the device makes full use of the flow state when water enters the radial-flow sedimentation tank, so that a coagulant and raw water are fully mixed, tiny flocs collide with each other under the action of gravity to form larger flocs particles, and meanwhile, the hollow fiber membrane discharges water radially, so that water inflow is more uniform, pollution dead angles are reduced, the working period of the hollow fiber membrane is effectively prolonged, and the service life of the hollow fiber membrane is prolonged. And pool maintenance is reduced.

Description

Technical Field

[0001] This utility model relates to the field of water treatment technology, and in particular to a radial flow uniform water inlet immersion hollow fiber membrane tank. Background Technology

[0002] As urbanization deepens, the population gradually concentrates in cities, leading to high-density population distribution. This high-density population concentration brings about water pollution problems. Among water pollution, the most common type is water quality deterioration caused by the rampant proliferation of algae due to eutrophication.

[0003] Current research indicates that higher water temperatures favor algal growth. The southeastern coastal region of my country has a subtropical monsoon climate, characterized by hot, rainy summers and mild, dry summers. The combined effects of climate and human activities have led to numerous algal blooms in the area, negatively impacting the ecological environment and residents' lives.

[0004] Faced with this challenge, large water plants are under pressure in treating water with high algae levels. Algae not only interfere with water treatment processes, clogging pipes and filters and reducing the efficiency of equipment, but they also increase the use of chemicals and the generation of disinfection byproducts. Algal cells themselves can increase the amount of coagulants needed, leading to excessive metal ion concentrations in the settled water. Furthermore, during subsequent chlorination disinfection, algal organic matter can generate more potential carcinogens, severely weakening the microbial safety and overall quality of the water supply network.

[0005] For example, a radial flow sedimentation and filtration device for deep wastewater treatment, Chinese Patent No. CN219815586U, includes a sedimentation tank with a central column fixedly connected to its center and a support plate rotating above the sedimentation tank around the central column; a spraying mechanism mounted on the support plate for spraying the interior of the sedimentation tank; and a cleaning mechanism mounted on the support plate for cleaning the inner wall of the sedimentation tank. After sedimentation, the device uses an outlet pipe connected to the outer wall of the sedimentation tank to open an outlet valve, allowing the settled clear water to be discharged through a fiber filter screen inside the outlet pipe. After the settled clear water is discharged, the motor is turned on, and the valve on the outer wall of the algaecide pipe is opened, allowing the algaecide in the algaecide tank to flow out and wet the roller brush attached to the outer wall of the algaecide pipe. The rotation of the roller brush removes moss and algae from the inner wall of the sedimentation tank. At the same time, a scraper at the bottom rotates under the rotation of the support plate, pushing the sludge settled at the bottom of the sedimentation tank into a sludge discharge trough and then discharged through a pipe.

[0006] However, in the above-mentioned device, the fiber filter screen installed inside the water outlet pipe is easily clogged during long-term use, affecting the water output efficiency. In addition, the device cannot work continuously, and the pipe valves and motor need to be opened and closed multiple times during operation.

[0007] Based on the above problems, this utility model proposes a radial flow uniform water inlet immersion hollow fiber membrane tank, which improves the working cycle of ultrafiltration membrane, reduces operation complexity, promotes more uniform water flow, and reduces pollution dead zones. Utility Model Content

[0008] To address the aforementioned issues, this invention proposes a radial flow uniform water inlet immersion hollow fiber membrane tank. This structure can solve the problems of radial flow sedimentation tanks being unable to operate continuously and the outlet pipes being prone to blockage, thus affecting water output efficiency.

[0009] To solve the above problems, the technical solution of this utility model is as follows:

[0010] This utility model discloses a radial flow uniform water inlet immersion hollow fiber membrane tank, including an inlet pipe, an inlet well, an annular water collection trough, a baffle plate, a hollow fiber membrane assembly, an outlet pipe, a sludge discharge pipe, and a tank body. An inlet well is provided on the outer side of the tank body, with the inlet pipe connected to the bottom of the inlet well. The upper part of the inlet well is connected to the annular water collection trough, with an opening at the connection point. The annular water collection trough is located on the inner wall of the tank body, and an outlet gap is provided at the bottom of the annular water collection trough. The annular water collection trough, the baffle plate, and the inner wall of the tank body form a downward-facing annular water inlet channel. The bottom of the tank body has an inclined surface sloping towards the center, with a groove in the center. The sludge discharge pipe inlet is located at the bottom of the central groove. The hollow fiber membrane assembly includes multiple hollow fiber membrane segments, and multiple hollow fiber membrane assemblies arranged in parallel are provided inside the tank body.

[0011] Furthermore, a PVC pipe is laid at the bottom of the annular water collection trough, and the PVC pipe surrounds the entire pool body along the annular water collection trough, with openings evenly distributed at the bottom of the PVC pipe.

[0012] Furthermore, the water outlet pipe includes a membrane module water outlet pipe and a membrane module water collection pipe. Each hollow fiber membrane module corresponds to one membrane module water outlet pipe, and all membrane module water outlet pipes are connected to the membrane module water collection pipe at the center of the pool body.

[0013] Furthermore, a central platform is provided at the center of the pool body. The central platform is hollow inside, and the membrane module water collection pipe is laid along the inside of the central platform to the top of the pool body, and then laid outwards from the top of the pool body.

[0014] Furthermore, the hollow fiber membrane module includes multiple hollow fiber membrane segments, which are evenly distributed inside the pool body. The height of the hollow fiber membrane module is lower than the horizontal plane inside the pool body during operation. The hollow fiber membrane module is evenly arranged in a radial flow pattern along the central platform.

[0015] Furthermore, a water pump is also provided outside the pool body, and the water pump is connected to the water collection pipe of the membrane module.

[0016] Furthermore, a pump house is provided on the side of the pool body, and a water suction pump is installed in the pump house.

[0017] Furthermore, the number of hollow fiber membrane tank components can be selected as 4-12, more preferably 5-8. Each hollow fiber membrane component includes hollow fiber membranes arranged in parallel and a closed space formed by the hollow fiber membranes. A membrane component water outlet pipe is provided at the upper part of the closed space formed by the hollow fiber membranes, and the membrane component water outlet pipe is connected to the membrane component water collection pipe through the outlet.

[0018] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0019] 1. This utility model makes full use of the flow pattern of the radial flow sedimentation tank when the water is fed in, so that the coagulant and the high algae water are fully mixed. Under the dual action of water flow and gravity, the small flocs collide with each other to form larger floc particles. At the same time, the hollow fiber membrane discharges water radially, which promotes more uniform water intake, reduces membrane fouling dead zones, effectively improves the working cycle of the hollow fiber membrane, and reduces the maintenance of the reactor.

[0020] 2. This utility model generates negative pressure inside the hollow fiber membrane by using a water pump to further remove residual micro-suspended particles, colloids, and soluble organic matter in the water. This not only greatly extends the working cycle of the hollow fiber membrane but also effectively removes algal-derived organic matter and suspended particles from the water, improving the quality of the effluent. Attached Figure Description

[0021] Figure 1 This is a cross-sectional view of a radial flow uniform water inlet immersion hollow fiber membrane tank according to the present invention;

[0022] Figure 2 This is a cross-sectional view of a radial flow uniform water inlet immersion hollow fiber membrane tank according to the present invention.

[0023] Figure 3 This is a schematic diagram of the planar structure of a radial flow uniform water inlet immersion hollow fiber membrane tank according to the present invention;

[0024] Figure 4 This is a schematic diagram showing the placement of the hollow fiber membrane module of this utility model;

[0025] Figure 5 This is a schematic diagram of the water outlet of the hollow fiber membrane module of this utility model.

[0026] Legend:

[0027] 0. Inlet pipe; 1. Inlet well; 2. Annular collection trough; 3. Baffle plate; 4. Hollow fiber membrane module; 5. Membrane module outlet pipe; 6. Valve; 7. Automatic air vent valve; 8. Central platform; 9. Membrane module collection pipe; 10. Pump room; 11. Suction pump; 12. Vent pipe; 13. Support column; 14. Tank body; 15. Sludge discharge pipe; 16. PVC pipe. Detailed Implementation

[0028] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0029] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0030] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings: Example 1

[0031] like Figures 1 to 5 As shown:

[0032] This utility model discloses a radial flow uniform water inlet immersion hollow fiber membrane tank, including an inlet pipe 0, an inlet well 1, an annular water collection tank 2, a hollow fiber membrane module 4, a membrane module outlet pipe 5, a membrane module water collection pipe 9, a pump house 10, a suction pump 11, a vent pipe 12, a tank body 14, and a sludge discharge pipe 15. The side of the tank body 14 is provided with an inlet well 1 and a pump house 10. An inlet pipe 0 is pre-embedded in the inlet well 1. The annular water collection tank 2 is located above the inner wall of the tank body 14. The hollow fiber membrane module 4 is located inside the tank body 14. The top of the hollow fiber membrane module 4 is connected to the membrane module outlet pipe 5. The upper end of the membrane module water collection pipe 9 is connected to the membrane module outlet pipe 5. The lower end of the membrane module water collection pipe is connected to the suction pump 11 located in the pump house 10. The bottom of the tank body 14 is provided with a sludge discharge pipe 15 and a vent pipe 12.

[0033] The inlet well 1 is used to slow down the flow rate of the raw water and ensure that the water flows into the sedimentation tank evenly. The annular water collection tank 2 is used to distribute the raw water to the periphery of the tank body 14, so that the raw water enters the tank from the periphery of the tank body 14. The hollow fiber membrane module 4 is used to filter the raw water. The filtered water is discharged through the membrane module water collection pipe 9 under the action of the suction pump 11. At the same time, the suction pump 11 is also used to create negative pressure in the hollow fiber membrane module 4. The sludge that settles at the bottom of the tank is discharged through the sludge discharge pipe 15 under the action of gravity. The pump house 10 is used to house the suction pump 11.

[0034] In this embodiment, a PVC pipe 16 is also provided at the bottom of the annular water collection tank 2. The PVC pipe 16 has multiple small holes evenly distributed. The raw water and coagulant are mixed before the water inlet pipe 0. The mixed water enters the water inlet well 1 through the water inlet pipe 0 to complete the first mixing. The water in the water inlet well 1 overflows into the annular water collection tank 2 and undergoes a second mixing in the PVC pipe 16. One side of the annular water collection tank 2 is the inner wall of the tank, and the other side is provided with a baffle plate 3. The baffle plate 3 and the inner wall of the tank form a channel leading to the bottom of the tank. After the mixed raw water and coagulant flow out from the openings on the PVC pipe 16, they reach the bottom of the tank along the channel formed by the baffle plate 3 and the inner wall of the tank.

[0035] In this embodiment, the bottom surface of the pool body 14 is sloped from all sides to the center, and a recessed area is provided in the center. A central platform 8 is provided in the center of the pool body 14. A drain pipe 12 and a sludge discharge pipe 15 are provided at the bottom of the pool body 14. Under the action of gravity, the sludge in the water settles to the bottom of the pool and flows from the bottom of the pool body 14 to the center. The sludge gathers from all sides to the center and falls into the recessed area in the center. The inlet of the sludge discharge pipe 15 is located in the central recessed area. At this time, as long as the water pipe switch is turned on, the sludge in the central recessed area of ​​the pool will be discharged into the pool body 14 through the sludge discharge pipe 15.

[0036] like Figure 5 As shown, in this utility model, multiple membrane module outlet pipes 5 are provided, and all of the multiple membrane module outlet pipes 5 are connected to the membrane module collection pipe 9. The hollow fiber membrane module 4 is provided in 4 groups, and the included angle between each group of hollow fiber membrane modules 4 is 90°. Each group of hollow fiber membrane modules 4 is individually connected to a membrane module outlet pipe 5, which converges at the central platform 8 and then connects to the membrane module collection pipe 9. The central platform 8 is hollow inside, and the membrane module collection pipe 9 is laid upward along the central platform 8, reaching the water pump 11 from the top of the pool.

[0037] Each hollow fiber membrane module 4 includes two rectangular structures with an internal hollow structure formed by fiber membranes. The top fiber membrane has through holes for connecting the membrane module outlet pipe 5, and the bottom fiber membrane has four supports to support its own weight. The supports support the weight of the hollow fiber membrane module 4 and can lift the bottom fiber membrane to prevent sludge from being sucked into the bottom of the tank body 14 when the hollow fiber membrane module 4 is under negative pressure, which would cause the fiber membrane to become blocked. At the same time, it can prevent the connection between the membrane module outlet pipe 5 and the hollow fiber membrane module 4 from being damaged due to the weight of the hollow fiber membrane module 4 when the tank is not working. The membrane module outlet pipe 5 is equipped with a valve 6 and an automatic air vent valve 7. The automatic air vent valve 7 can be used to release pressure between the membrane module outlet pipe 5 and the hollow fiber membrane module 4 to stop the equipment operation.

[0038] The hollow fiber membrane module 4 is detachably fixed to a bottom support at the bottom of the pool. The bottom support has a substantially flat plane. The center of the bottom support is connected to the central platform 8. The lower part of the bottom support is provided with a plurality of pillars 13 that match the bottom of the conical pool. The pillars 13 keep the bottom support substantially flat for placing the hollow membrane module 4. Example 2

[0039] Compared with Example 1, the difference is that the radial flow uniform water inlet submerged hollow fiber membrane tank in Example 2 is further provided with a working platform at the top, and the working platform is located between the central platform 8 and the tank wall.

[0040] Specific working process: The coagulant is added before the raw water passes through the inlet pipe 0. After the mixture enters the inlet well 1, the raw water in the inlet well 1 overflows into the annular collection tank 2. After further reaction and flocculation in the annular collection tank 2, it enters the PVC pipe 16 at the bottom. When passing between the PVC pipe 16 and the inlet well 1, it undergoes preliminary mixing in the PVC pipe 16. Then, it flows through the opening at the bottom of the PVC pipe 16 into the channel formed by the inner wall of the pool and the baffle plate 3 to the bottom of the pool. Under the action of gravity, the coagulant and the raw water are fully mixed. Under the dual action of the coagulated micro-flocs and gravity, they collide with each other to form larger floc particles. Most of the suspended particles in the raw water and Organic matter is removed, and the flocs that settle at the bottom of the pool gather at the central depression at the bottom of the pool body 14 under the action of gravity. When sludge needs to be discharged, the sludge discharge pipe 15 is opened, and the sludge discharge pipe 15 at the central depression at the bottom of the pool body 14 discharges the sludge from the pool. When the water level submerges the hollow fiber membrane module 4, the suction pump 11 in the pump house 10 is started. A negative pressure is generated in the hollow fiber membrane module 4 through the membrane module water collection pipe 9, and the water is filtered through the hollow fiber membrane module 4. The filtered water is collected along the membrane module outlet pipe 5 and then discharged through the membrane module water collection pipe 9 and discharged through the pump house. This utility model makes full use of the radial flow pattern, reduces membrane fouling dead zones, promotes uniform membrane surface fouling, and improves the working cycle of the ultrafiltration membrane.

[0041] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A radial flow uniform water-inlet submerged hollow fiber membrane cell, characterized by: The application relates to a water purification device, which comprises a water inlet pipe, a water inlet well, an annular water collecting tank, a flow baffle, a hollow fiber membrane assembly, a water outlet pipe, a sludge discharge pipe and a pool body; the water inlet well is arranged on the outer side of the pool body, the water inlet pipe is connected to the bottom of the water inlet well, the upper part of the water inlet well is connected with the annular water collecting tank, and the connecting part is provided with an opening; the annular water collecting tank is arranged on the inner wall of the pool body, the bottom of the annular water collecting tank is provided with a water outlet gap, and the annular water collecting tank, the flow baffle and the inner wall of the pool body form an annular water inlet channel for downward water inlet; the bottom of the pool body is provided with an inclined surface inclined to the center, the center is provided with a groove, and the inlet of the sludge discharge pipe is arranged at the bottom of the center groove; the hollow fiber membrane assembly comprises multiple hollow fiber membranes, and the pool body is internally provided with multiple hollow fiber membrane assemblies arranged in parallel.

2. A radial flow uniform water inlet submerged hollow fiber membrane cell according to claim 1, characterized in that: The bottom of the annular water collecting tank is paved with a PVC pipe, the PVC pipe surrounds the whole pool body along the annular water collecting tank, and the bottom of the PVC pipe is uniformly provided with openings.

3. A radial flow uniform water inlet submerged hollow fiber membrane cell according to claim 1, characterized in that: The water outlet pipe comprises a membrane assembly water outlet pipe and a membrane assembly water collecting pipe, each hollow fiber membrane assembly is correspondingly provided with a membrane assembly water outlet pipe, and the membrane assembly water outlet pipes are all connected to the membrane assembly water collecting pipe at the center of the pool body.

4. A radial flow uniform water inlet submerged hollow fiber membrane cell according to claim 3, characterized in that: The center of the pool body is provided with a center platform, the center platform is hollow, the membrane assembly water collecting pipe is paved to the top of the pool body along the inside of the center platform, and is paved outward along the top of the pool body.

5. A radial flow uniform water inlet submerged hollow fiber membrane cell according to claim 1, characterized in that: The hollow fiber membrane assembly comprises multiple hollow fiber membranes and is uniformly distributed in the pool body, the height of the hollow fiber membrane assembly is lower than the horizontal plane during operation in the pool body, and the hollow fiber membrane assembly is uniformly arranged in a radial flow mode along the center platform.

6. A radial flow uniform water inlet submerged hollow fiber membrane cell according to claim 1, characterized in that: The pool body is further provided with a water suction pump outside, and the water suction pump is connected with the membrane assembly water collecting pipe.

7. A radial flow uniform water inlet submerged hollow fiber membrane cell according to claim 6, characterized in that: The side of the pool body is provided with a pump house, and the water suction pump is arranged in the pump house.

8. A radial flow uniform water inlet submerged hollow fiber membrane cell according to claim 5, characterized in that: The number of the hollow fiber membrane assemblies is 4-12, each hollow fiber membrane assembly comprises hollow fiber membranes arranged in parallel and a closed space formed by the hollow fiber membranes, the upper part of the closed space formed by the hollow fiber membranes is provided with a membrane assembly water outlet pipe, the membrane assembly water outlet pipe is connected with the membrane assembly water collecting pipe through an outlet.

9. A radial flow uniform water inlet submerged hollow fiber membrane cell according to claim 8, characterized in that: The number of the hollow fiber membrane assemblies is 5-8.

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