Anaerobic external tubular ultrafiltration membrane bioreactor with filter screen convenient to replace

Abstract

The utility model belongs to the technical field of sewage treatment, and particularly relates to an anaerobic external tubular ultrafiltration membrane bioreactor with a filter screen convenient to replace, which comprises an anaerobic reactor, a methane collecting device and a tubular ultrafiltration membrane device, a corrugated rubber sleeve is arranged on the surface of a tubular ultrafiltration membrane, and one end of the corrugated rubber sleeve is fixed on the surface of the tubular ultrafiltration membrane. The two ends of the tubular ultrafiltration membrane are transversely connected with a threaded rod, the surface of the threaded rod is connected with a convex block, a first nut and a second nut, and when a filter screen in the tubular ultrafiltration membrane is damaged, the filter screen can be conveniently replaced only by disassembling and assembling a fixing block. In addition, due to the matched design of the fixing blocks and the limiting blocks, the stability of the filter screen in the using process is effectively enhanced, displacement of the filter screen due to the water pressure effect is prevented, and normal operation is ensured. Meanwhile, the adopted corrugated rubber sleeve can protect the periphery of the tubular ultrafiltration membrane, and the damage risk caused by external factors is remarkably reduced.

Description

Technical Field

[0001] This utility model belongs to the field of wastewater treatment technology, specifically relating to an anaerobic external tubular ultrafiltration membrane bioreactor with easy filter replacement. Background Technology

[0002] The working principle of an anaerobic external tubular ultrafiltration membrane bioreactor is mainly based on two processes: anaerobic digestion and membrane separation. In the anaerobic reactor, organic matter is metabolized and broken down into smaller molecules by anaerobic and facultative anaerobic microorganisms. Subsequently, the mixed liquor is filtered through an external tubular ultrafiltration membrane device to separate sludge and water, directly obtaining high-quality ultrafiltration permeate, while the concentrated water is returned to the biological treatment tank for further treatment.

[0003] After prolonged operation, the tubular ultrafiltration membrane in an anaerobic external tubular ultrafiltration membrane bioreactor often suffers damage, requiring disassembly and replacement. However, the internal filter screen of the tubular ultrafiltration membrane is welded, necessitating direct replacement of the entire membrane. The high cost of tubular ultrafiltration membranes places a significant economic burden on enterprises. Therefore, we provide an anaerobic external tubular ultrafiltration membrane bioreactor with a convenient filter screen replacement design. Utility Model Content

[0004] The purpose of this invention is to provide an anaerobic external tubular ultrafiltration membrane bioreactor with a convenient filter screen replacement. This addresses the problem in existing technologies where, after prolonged operation, the tubular ultrafiltration membrane in anaerobic external tubular ultrafiltration membrane bioreactors often suffers damage, requiring disassembly and replacement. Since the internal filter screen of the tubular ultrafiltration membrane is welded, direct replacement of the tubular ultrafiltration membrane is necessary, and the high cost of tubular ultrafiltration membranes places a significant economic burden on enterprises. Therefore, we provide an anaerobic external tubular ultrafiltration membrane bioreactor with a convenient filter screen replacement.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an anaerobic external tubular ultrafiltration membrane bioreactor with convenient filter replacement, comprising an anaerobic reactor, a biogas collection device, and a tubular ultrafiltration membrane device. The anaerobic reactor, biogas collection device, and tubular ultrafiltration membrane device are connected by a pipe. A base is provided at the bottom of the anaerobic reactor, biogas collection device, and tubular ultrafiltration membrane device. One end of the anaerobic reactor is connected to an inlet pump. The tubular ultrafiltration membrane device is composed of multiple tubular ultrafiltration membranes connected together. The surface of each tubular ultrafiltration membrane is provided with a corrugated rubber sleeve, and one end of the tubular ultrafiltration membrane is fixed to the surface of the membrane. Threaded rods are laterally connected to both ends of the tubular ultrafiltration membrane. The surface of the threaded rods is connected with protrusions and a first nut and a second nut.

[0006] As a preferred embodiment of the present invention, an anaerobic external tubular ultrafiltration membrane bioreactor with convenient filter replacement, wherein the protrusion is connected to the corrugated rubber sleeve, and the corrugated rubber sleeve is extended to the surface of the tubular ultrafiltration membrane through the protrusion and the threaded rod.

[0007] As a preferred embodiment of the anaerobic external tubular ultrafiltration membrane bioreactor of this utility model, which facilitates filter replacement, the corrugated rubber sleeve is fixedly connected to the surface of the threaded rod by a protrusion and a first nut and a second nut.

[0008] As a preferred embodiment of the present invention, an anaerobic external tubular ultrafiltration membrane bioreactor with convenient filter replacement, the inner cavity of the tubular ultrafiltration membrane is provided with a limiting block and a fixing block. The limiting block is fixed to one end of the inner cavity of the tubular ultrafiltration membrane, and a sealing ring is connected to the end face of the tubular ultrafiltration membrane near the fixing block.

[0009] As a preferred embodiment of the anaerobic external tubular ultrafiltration membrane bioreactor of this utility model, which facilitates filter replacement, the surface of the tubular ultrafiltration membrane near the fixed block is connected with bolts.

[0010] In a preferred embodiment of this utility model of an anaerobic external tubular ultrafiltration membrane bioreactor that facilitates filter replacement, the bolt passes through the outer shell of the tubular ultrafiltration membrane and connects to the fixing block.

[0011] As a preferred embodiment of the anaerobic external tubular ultrafiltration membrane bioreactor of this utility model, which facilitates filter replacement, the limiting block and the fixing block are both adapted to the inner cavity size of the tubular ultrafiltration membrane.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] When the filter screen inside the tubular ultrafiltration membrane is damaged, this invention allows for easy replacement of the filter screen simply by removing and installing the fixing block. Furthermore, the coordinated design of the fixing block and the limiting block effectively enhances the stability of the filter screen during use, preventing displacement due to water pressure and ensuring normal operation. Simultaneously, the corrugated rubber sleeve protects the outer periphery of the tubular ultrafiltration membrane, significantly reducing the risk of damage caused by external factors. Attached Figure Description

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the tubular ultrafiltration membrane structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the cross-sectional structure of the tubular ultrafiltration membrane of this utility model;

[0018] Figure 4 For this utility model Figure 3 Enlarged structural diagram at point A in the middle.

[0019] In the diagram: 1. Anaerobic reactor; 2. Biogas collection device; 3. Tubular ultrafiltration membrane device; 4. Base; 5. Pipeline; 6. Inlet pump; 7. Tubular ultrafiltration membrane; 31. Threaded rod; 32. Protrusion; 33. First nut; 34. Second nut; 35. Corrugated rubber sleeve; 36. Sealing ring; 37. Bolt; 38. Fixing block; 39. Limiting block. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Example 1

[0022] Please see Figure 1-4 This utility model provides the following technical solution: an anaerobic external tubular ultrafiltration membrane bioreactor with convenient filter replacement, comprising an anaerobic reactor 1, a biogas collection device 2, and a tubular ultrafiltration membrane device 3. The anaerobic reactor 1, the biogas collection device 2, and the tubular ultrafiltration membrane device 3 are connected by a pipe 5 and are interconnected through the pipe 5. The bottom end of the anaerobic reactor 1, the biogas collection device 2, and the tubular ultrafiltration membrane device 3 is provided with a base 4. One end of the anaerobic reactor 1 is connected to an inlet pump 6. The tubular ultrafiltration membrane device 3 is composed of multiple tubular ultrafiltration membranes 7 connected together. The surface of the tubular ultrafiltration membrane 7 is provided with a corrugated rubber sleeve 35 and one end is fixed to the surface of the tubular ultrafiltration membrane 7. The two ends of the tubular ultrafiltration membrane 7 are connected laterally with threaded rods 31. The surface of the threaded rods 31 is connected with protrusions 32, a first nut 33, and a second nut 34.

[0023] In a preferred embodiment: the protrusion 32 is connected to the corrugated rubber sleeve 35, and the corrugated rubber sleeve 35 unfolds to the surface of the tubular ultrafiltration membrane 7 through the protrusion 32 and the threaded rod 31.

[0024] In a preferred embodiment: the corrugated rubber sleeve 35 is fixedly connected to the surface of the threaded rod 31 by the protrusion 32, the first nut 33, and the second nut 34.

[0025] In this embodiment, the corrugated rubber sleeve 35 is used to protect the periphery of the tubular ultrafiltration membrane 7, significantly reducing the risk of damage caused by external factors.

[0026] Specifically: First, the anaerobic external tubular ultrafiltration membrane bioreactor uses an inlet pump 6 to send wastewater through a pipe 5 into the anaerobic reactor 1, where the anaerobic reactor 1 performs anaerobic digestion of organic matter. Then, the wastewater is sent through the pipe 5 into the tubular ultrafiltration membrane device 3, where the tubular ultrafiltration membrane device 3 separates the sludge and water. The filtered water is discharged directly. Then, a return pipe is connected between the tubular ultrafiltration membrane device 3 and the anaerobic reactor 1, and the sludge is returned to the anaerobic reactor 1 through the return pipe for secondary filtration. This cycle is repeated to filter the wastewater. The biogas collection device 2 is used to collect the biogas produced by the anaerobic reactor 1 during operation and to treat and utilize it.

[0027] When using the tubular ultrafiltration membrane device 3, rotating the first nut 33 and the second nut 34 on the surface of a single tubular ultrafiltration membrane 7 releases the fixed position of the protrusion 32 on the threaded rod 31, allowing the protrusion 32 to slide freely along the surface of the threaded rod 31. Subsequently, pushing the protrusion 32 to the left or right easily unfolds or retracts the corrugated rubber sleeve 35. The unfolded corrugated rubber sleeve 35 effectively protects the outer periphery of the tubular ultrafiltration membrane 7, significantly reducing the risk of damage caused by external factors. Simultaneously, the first nut 33 and the second nut 34 respectively adhere to the two side walls of the protrusion 32, ensuring the protrusion 32 is stable and does not wobble, thereby improving operational stability.

[0028] In addition, the biogas collection device 2 is a stainless steel biogas collector made of 380V refractory material, and the tubular ultrafiltration membrane device 3 is a UF-201. Both of these devices belong to existing mature technologies and are connected to the anaerobic reactor 1.

[0029] Example 2

[0030] Please see Figure 1-4 The tubular ultrafiltration membrane 7 has a limiting block 39 and a fixing block 38 in its inner cavity. The limiting block 39 is fixed to one end of the inner cavity of the tubular ultrafiltration membrane 7, and a sealing ring 36 is connected to the end face of the tubular ultrafiltration membrane 7 near the fixing block 38.

[0031] In a preferred embodiment: a bolt 37 is connected to the surface of the tubular ultrafiltration membrane 7 near the fixed block 38.

[0032] In a preferred embodiment, bolt 37 passes through the outer shell of tubular ultrafiltration membrane 7 and connects to fixing block 38.

[0033] In the preferred embodiment, both the limiting block 39 and the fixing block 38 are adapted to the inner cavity size of the tubular ultrafiltration membrane 7.

[0034] In this embodiment, when the filter screen inside the packed tubular ultrafiltration membrane 7 is damaged, the filter screen can be easily replaced simply by removing and installing the fixing block 38.

[0035] Specifically, after prolonged use, if the filter screen (ultrafiltration membrane) inside the tubular ultrafiltration membrane 7 is damaged, the user can easily disassemble and replace a single tubular ultrafiltration membrane 7. The steps are as follows: first, open the outer casing of the tubular ultrafiltration membrane 7; then, unscrew the bolt 37 to release the fixing block 38; next, remove the fixing block 38 to expose the filter screen and easily pull it out for replacement. This design significantly reduces the cost of replacing the entire tubular ultrafiltration membrane 7. Simultaneously, the precise fit between the fixing block 38 and the limiting block 39 effectively enhances the stability of the filter screen during use, preventing displacement caused by water pressure and ensuring the normal operation of the device.

[0036] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An anaerobic external tubular ultrafiltration membrane bioreactor with easily replaceable filter screen, comprising an anaerobic reactor (1), a biogas collection device (2), and a tubular ultrafiltration membrane device (3), characterized in that: The anaerobic reactor (1), biogas collection device (2) and tubular ultrafiltration membrane device (3) are connected by a pipe (5) and are connected to each other through the pipe (5). The bottom end of the anaerobic reactor (1), biogas collection device (2) and tubular ultrafiltration membrane device (3) is provided with a base (4); one end of the anaerobic reactor (1) is connected to a water inlet pump (6). The tubular ultrafiltration membrane device (3) is composed of multiple tubular ultrafiltration membranes (7) connected together. The surface of the tubular ultrafiltration membrane (7) is provided with a corrugated rubber sleeve (35) and one end is fixed to the surface of the tubular ultrafiltration membrane (7). The two ends of the tubular ultrafiltration membrane (7) are connected with threaded rods (31) in a transverse manner. The surface of the threaded rods (31) is connected with protrusions (32), a first nut (33), and a second nut (34).

2. The anaerobic external tubular ultrafiltration membrane bioreactor with convenient filter replacement according to claim 1, characterized in that: The protrusion (32) is connected to the corrugated rubber sleeve (35), and the corrugated rubber sleeve (35) unfolds to the surface of the tubular ultrafiltration membrane (7) through the protrusion (32) and the threaded rod (31).

3. The anaerobic external tubular ultrafiltration membrane bioreactor with easily replaceable filter screen according to claim 1, characterized in that: The corrugated rubber sleeve (35) is fixedly connected to the surface of the threaded rod (31) by a protrusion (32), a first nut (33), and a second nut (34).

4. The anaerobic external tubular ultrafiltration membrane bioreactor with convenient filter replacement according to claim 1, characterized in that: The tubular ultrafiltration membrane (7) has a limiting block (39) and a fixing block (38) in its inner cavity. The limiting block (39) is fixed to one end of the inner cavity of the tubular ultrafiltration membrane (7), and a sealing ring (36) is connected to the end face of the tubular ultrafiltration membrane (7) near the fixing block (38).

5. The anaerobic external tubular ultrafiltration membrane bioreactor with convenient filter replacement according to claim 1, characterized in that: The tubular ultrafiltration membrane (7) is connected to a bolt (37) on the surface near the fixed block (38).

6. An anaerobic external tubular ultrafiltration membrane bioreactor with a convenient filter screen replacement according to claim 5, characterized in that: The bolt (37) passes through the outer shell of the tubular ultrafiltration membrane (7) and is connected to the fixing block (38).

7. An anaerobic external tubular ultrafiltration membrane bioreactor with a convenient filter screen replacement according to claim 4, characterized in that: The limiting block (39) and the fixing block (38) are both adapted to the inner cavity size of the tubular ultrafiltration membrane (7).

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