Built-in MBR membrane hospital sewage treatment device

Abstract

The application discloses a built-in MBR membrane hospital sewage treatment device, which comprises a regulating tank, an MBR membrane tank and MBR flat membrane elements. Sewage in the regulating tank is delivered to the MBR membrane tank through two sets of 1:1 standby lifting pumps. The lifting pumps are controlled to start and stop by high / low liquid level sensors, and are automatically switched every 12 hours and switched in real time when a fault occurs. The regulating tank and the MBR membrane tank are both provided with an aeration system, which comprises an aeration pipeline, an aeration head, a mounting bracket and a supporting assembly. The supporting assembly is detachably connected with the mounting bracket through buckling pieces and plug-in pieces. The self-priming pump in the MBR membrane tank is intermittently operated, the membrane elements intercept sludge, and the aeration system continuously flushes the membrane surface. The device realizes stable sewage treatment, rapid maintenance of the aeration system and redundant operation of the equipment, and is suitable for hospital sewage treatment.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a built-in MBR membrane hospital wastewater treatment device. Background Technology

[0002] In the field of medical wastewater treatment, MBR (membrane bioreactor) technology has become one of the mainstream processes due to its high efficiency in solid-liquid separation and stable effluent quality. For example, Chinese patent CN201234567U discloses an MBR membrane tank aeration structure, which uses a fixed support to install aeration pipes at the bottom of the membrane tank, utilizing aeration to flush the membrane surface and mitigate fouling. However, this existing technology has the following drawbacks:

[0003] The aeration system is difficult to maintain: the aeration pipeline and the fixed support are rigidly connected by welding or bolts. When the aeration head is blocked or the pipeline leaks, the support and pipeline need to be completely removed, resulting in long maintenance time and high cost.

[0004] Lack of equipment redundancy design: Booster pumps and blowers are usually operated as stand-alone units, lacking an automatic switching mechanism. Once a failure occurs, it can easily lead to processing interruption, so it is necessary to make improvements. Summary of the Invention

[0005] This utility model aims to solve one of the technical problems existing in the prior art.

[0006] This application provides a built-in MBR membrane hospital wastewater treatment device, including an equalization tank, an MBR membrane tank, and MBR flat sheet membrane elements. Wastewater in the equalization tank enters the MBR membrane tank through a lift pump. Both the equalization tank and the MBR membrane tank are equipped with an aeration system. The MBR membrane tank contains several MBR flat sheet membrane elements. The equalization tank is equipped with a high liquid level sensor and a low liquid level sensor for controlling the start and stop of the lift pump.

[0007] There are two booster pumps.

[0008] The aeration system includes aeration pipes, aeration heads, mounting brackets, and support components. The mounting brackets are fixed to the bottom of the equalization tank or MBR membrane tank, and the aeration pipes are mounted on the mounting brackets via the support components.

[0009] The support assembly includes a support tube, a locking element, a housing, and a connector. The housing is fixed to the top of the mounting bracket. The top end of the support tube is detachably connected to the aeration pipeline via the locking element, and the bottom end is locked in the housing and detachably connected to the housing via the connector.

[0010] The locking component includes a connecting pipe, a strap, a pair of slots, and a pair of notches. The connecting pipe is threaded onto the support pipe and has a bearing shell at the top that adapts to the outer diameter of the aeration pipe. The pair of slots are symmetrically arranged at both ends of the bearing shell, and the pair of notches are arranged in the middle of the slots. Both ends of the strap are engaged with each slot through a locking rod to fix the aeration pipe in the bearing shell.

[0011] The support assembly also includes a pair of reinforcing ears, which are symmetrically fixed on the peripheral wall of the connecting pipe and support the bearing shell at the top.

[0012] The connector includes a fixed cylinder, a pair of insert blocks, a preload spring, and a pair of slots. The fixed cylinder is fixed to the bottom of the inner cavity of the bearing shell. The pair of slots are symmetrically opened at the lower end of the inner wall of the support tube. The pair of insert blocks are symmetrically inserted into the peripheral wall of the fixed cylinder. The preload spring is disposed between the inner ends of the pair of insert blocks and is used for inserting the outer ends of the insert blocks into the slots.

[0013] The connector also includes a guide slope, which is disposed at the bottom of the inner peripheral wall of the support tube, and the outer end faces of the pair of plugs are both inclined.

[0014] The connector also includes a pair of bottom grooves, a pair of side grooves and a pair of pressing plates. The pair of bottom grooves are symmetrically opened at the bottom end of the support tube and connect to the corresponding slot. The pair of side plates are symmetrically opened on the side wall of the insert shell. The pair of pressing plates are respectively fixed to the outer end of each insert block and slidably inserted into the corresponding bottom groove and side groove, with the outer end extending out of the side groove.

[0015] The width of the side groove and bottom groove is smaller than the diameter of the slot. The beneficial effects of this invention are as follows:

[0016] Ease of maintenance: With the detachable design of the locking and plug-in parts, the aeration pipes or aeration heads can be quickly replaced without removing the mounting bracket, reducing maintenance time by more than 50%.

[0017] Equipment redundancy guarantee: The automatic switching mechanism of dual lift pumps and dual blowers ensures the continuity of sewage transportation and aeration processes, and avoids treatment interruption due to single-unit failure. Attached Figure Description

[0018] Figure 1 This is a perspective view of the hospital wastewater treatment device with built-in MBR membrane in the embodiments of this application;

[0019] Figure 2 This is a diagram showing the internal structure of the built-in MBR membrane hospital wastewater treatment device in the embodiments of this application;

[0020] Figure 3 This is a cross-sectional view of the supporting component in an embodiment of this application;

[0021] Figure 4 This is the left view in an embodiment of this application;

[0022] Figure 5 This is a cross-sectional view of the support tube in an embodiment of this application;

[0023] Figure 6 This is a top view of the insert block in an embodiment of this application.

[0024] Figure Labels

[0025] 1-Equalization tank, 2-MBR membrane tank, 3-MBR flat sheet membrane element, 4-Aeration system, 41-Aeration pipeline, 42-Aeration head, 43-Mounting bracket, 5-Support assembly, 51-Support pipe, 52-Locking piece, 521-Connecting pipe, 522-Binding strap, 523-Slot, 524-Notched slot, 525-Bearing shell, 526-Clamping rod, 527-Reinforcing ear, 53-Insertion shell, 54-Insertion connector, 541-Fixing cylinder, 542-Insertion block, 543-Preload spring, 544-Slot, 545-Guide slope, 546-Bottom groove, 547-Side groove, 548-Pressing plate. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0027] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0028] The built-in MBR membrane hospital wastewater treatment device provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0029] A built-in MBR membrane hospital wastewater treatment device includes an equalization tank 1, an MBR membrane tank 2, and MBR flat sheet membrane elements 3. Wastewater in the equalization tank 1 enters the MBR membrane tank 2 through a lift pump. Both the equalization tank 1 and the MBR membrane tank 2 are equipped with an aeration system 4. The MBR membrane tank 2 is equipped with several MBR flat sheet membrane elements 3. The equalization tank 1 is equipped with a high liquid level sensor and a low liquid level sensor for controlling the start and stop of the lift pump.

[0030] In this embodiment of the application, the booster pump has two units.

[0031] like Figures 1 to 2 As shown, due to the above structure, hospital wastewater, after pretreatment (such as removing particles ≥3mm by a fine screen), enters the equalization tank 1. High-level and low-level sensors in equalization tank 1 monitor the liquid level in real time. When the liquid level in equalization tank 1 reaches the set value of the high-level sensor, the control system triggers the start of one of the two booster pumps (default 1 active, 1 standby) to transport the wastewater to the MBR membrane tank 2. In manual mode, it can be started directly via a button. During booster pump operation, if there is an overload, the thermal relay will activate and trigger the shutdown protection (when there is an overload, the thermal relay switch trips, and the equipment stops running). When the liquid level in equalization tank 1 drops to the set value of the low-level sensor (to prevent dry running), or when the liquid level in the MBR membrane tank 2 reaches its high-level threshold (to avoid overflow), the booster pump automatically stops. The two booster pumps automatically switch to the other pump every 12 hours of continuous operation. If the operating pump fails, the control system immediately switches to the standby pump to ensure continuous wastewater transport (automatically switching to the other pump after 12 hours of continuous operation, and automatically switching to the other pump when one pump fails). (Pump operation) The aeration systems 4 of equalization tank 1 and MBR membrane tank 2 start synchronously. Aeration in equalization tank 1 releases airflow through pipelines to pre-stir the wastewater to equalize water quality. Aeration system 4 in MBR membrane tank 2 is powered by a blower (airflow 4.84 m³ / min, air pressure 0.03 MPa, 1 in operation, 1 standby), delivering airflow to the bottom of the membrane elements via UPVC main pipe and ABS branch pipes (the aeration base includes main aeration pipe and branch aeration pipes, with a total air supply of 4.84 m³ / min), continuously flushing the membrane surface. Membrane tank 2 is equipped with 4 sets of PE100-110 membrane modules (including 440 MF-F-1.0-PVDF flat sheet membrane elements, each with a surface area of ​​1.0㎡). The self-priming pump operates in an intermittent mode of "pumping for 8 minutes and stopping for 2 minutes" (working mechanism: 0.8, 8 minutes on and 2 minutes off). Under the action of suction negative pressure, the sewage is filtered through the membrane elements (membrane pore size 0.1μm), the permeate is discharged from the outlet, and the activated sludge is retained in the membrane tank (operating sludge concentration 8000-12000mg / L).

[0032] Example 2:

[0033] In this embodiment, in addition to the structural features of the aforementioned embodiments, the aeration system 4 includes an aeration pipe 41, an aeration head 42, a mounting bracket 43, and a support assembly 5. The mounting bracket 43 is fixed to the bottom of the equalization tank 1 or the MBR membrane tank 2, and the aeration pipe 41 is mounted on the mounting bracket 43 through the support assembly 5.

[0034] In this embodiment of the application, the support component 5 includes a support tube 51, a locking element 52, a housing 53, and a connector 54. The housing 53 is fixed to the top of the mounting bracket 43. The top end of the support tube 51 is detachably connected to the aeration pipe 41 through the locking element 52, and the bottom end is locked in the housing 53 and detachably connected to the housing 53 through the connector 54.

[0035] like Figures 1 to 3 As shown, due to the above structure, the mounting bracket 43 is pre-welded or bolted to the bottom of the regulating tank 1 or the MBR membrane tank 2, and the insert shell 53 of the support component 5 is welded to the top of the mounting bracket 43; the top end of the support pipe 51 is locked to the aeration pipe 41 (UPVC main pipe / ABS branch pipe) by the locking piece 52, and after the bottom end is inserted into the insert shell 53, it is locked to the insert shell 53 by the plug-in piece 54 to ensure that the aeration pipe 41 and the aeration head 42 are stable at the preset height (the aeration base includes the main aeration pipe and the branch aeration pipe, which are reinforced and fixed by the support component 5). After the blower is started, the airflow is released from the aeration head 42 through the aeration pipe 41. The air volume required for a single membrane module is ≥1.21m³ / min (440 membrane elements, the air volume required for a single element is 11L / (min・piece)). Due to the fixing effect of the support component 5, the aeration pipe 41 does not shake, and the airflow evenly washes the surface of the membrane element, avoiding local pollution. Two blowers The blowers automatically rotate every 12 hours, switching to the backup pump when one fails. When the equalization tank 1 and MBR membrane tank 2 are at low liquid levels for 30 minutes, the blowers enter an intermittent mode of "stopping for 3 hours and running for 30 minutes" (intermittent operation after equalization tank 1 and MBR membrane tank 2 are at low liquid levels for 30 minutes). When the aeration head 42 is blocked or the pipeline leaks, the locking parts 52 and plug parts 54 are released, the connection between the support pipe 51 and the aeration pipeline 41 and the insert shell 53 is disconnected, and after replacing or cleaning the parts, they are re-fixed by locking parts 52 and plug parts 54. There is no need to completely remove the mounting bracket 43, which shortens the maintenance time. The aeration system 4 is linked with the self-priming pump of MBR membrane tank 2. Aeration is continuous when the self-priming pump is running (ensuring membrane surface scouring). Aeration is still maintained when the self-priming pump is stopped (maintaining sludge suspension). It operates normally when the transmembrane pressure difference is ≤35KPa, and triggers the cleaning procedure when the limit is exceeded (transmembrane pressure difference ≤35KPa).

[0036] Example 3:

[0037] The difference from Embodiment 2 is that, in this embodiment, in addition to including the structural features of the aforementioned embodiments, the locking member 52 includes a connecting pipe 521, a strap 522, a pair of slots 523 and a pair of notches 524. The connecting pipe 521 is threaded onto the support pipe 51, and the top end is provided with a bearing shell 525 adapted to the outer diameter of the aeration pipe 41. The pair of slots 523 are symmetrically arranged at both ends of the bearing shell 525, and the pair of notches 524 are arranged in the middle of the slots 523. Both ends of the strap 522 are engaged with each slot 523 by a locking rod 526, which is used to fix the aeration pipe 41 in the bearing shell 525.

[0038] In this embodiment of the application, the support component 5 further includes a pair of reinforcing ears 527, which are symmetrically fixed on the periphery of the connecting pipe 521 and support the bearing shell 525 at the top.

[0039] like Figures 3 to 6 As shown, due to the above structure, the connecting pipe 521 is fixed by screwing its external thread into the internal thread at the top of the support pipe 51. The bearing shell 525 is installed synchronously with the connecting pipe 521, and its inner curvature is adapted to the outer diameter of the aeration pipe 41 (such as an ABS branch pipe). The aeration pipe 41 is placed inside the bearing shell 525. The clamping rod 526 at one end of the strap 522 is aligned with the groove 523 at one end of the bearing shell 525, and then it is passed around the aeration pipe 41. The clamping rod 526 at the other end is inserted into the groove 523 at the other end of the bearing shell 525. The connection positions of both ends of the strap 522 and the corresponding clamping rod 526 are located in the corresponding notches 524, realizing the radial tightening of the aeration pipe 41 by the strap 522. The pipeline is fixed inside the bearing shell 525 (the corresponding length of the binding strap 522 can be replaced according to the pipeline diameter). The top of the pair of reinforcing ears 527 on the periphery of the connecting pipe 521 abuts against the bottom of the bearing shell 525 to form a triangular support structure. When airflow is introduced into the aeration pipeline 41 and vibration occurs, the reinforcing ears 527 disperse the force on the bearing shell 525, preventing the connection between the connecting pipe 521 and the bearing shell 525 from breaking due to stress concentration. When the aeration pipeline 41 needs to be replaced or repaired, pull the binding strap 522 rod 526 in the opposite direction of the axial direction of the slot 523 to disengage it from the notch 524 and pull it out of the slot 523. After the binding strap 522 is released, the pipeline can be removed. After the operation is completed, relock it according to the above steps.

[0040] Example 4:

[0041] The difference from Embodiment 3 is that, in this embodiment, in addition to including the structural features of the aforementioned embodiments, the plug-in member 54 includes a fixed cylinder 541, a pair of plug blocks 542, a preload spring 543, and a pair of slots 544. The fixed cylinder 541 is fixed to the bottom of the inner cavity of the bearing shell 525. The pair of slots 544 are symmetrically opened at the lower end of the inner wall of the support tube 51. The pair of plug blocks 542 are symmetrically inserted into the peripheral wall of the fixed cylinder 541. The preload spring 543 is disposed between the inner ends of the pair of plug blocks 542 for inserting the outer ends of the plug blocks 542 into the slots 544.

[0042] In this embodiment of the application, the plug-in 54 further includes a guide slope 545, which is disposed at the bottom end of the inner peripheral wall of the support tube 51, and the outer end faces of the pair of plugs 542 are both inclined.

[0043] like Figures 3 to 6 As shown, due to the aforementioned structure, when the bottom end of the support tube 51 is aligned with the top end of the insert shell 53 and inserted, the guide slope 545 at the bottom end of the inner circumferential wall of the support tube 51 contacts the inclined surface at the outer end of the insert block 542. As the insertion depth increases, the guide slope 545 presses against the inner end of the insert block 542, forcing the insert block 542 to contract towards the inside of the fixed cylinder 541 and compress the preload spring 543. When the support tube 51 is inserted to the preset position (the insert block 542 is aligned with the slot 544), the preload spring 543 releases its elastic force, pushing the outer end of the insert block 542 out along the through hole in the circumferential wall of the fixed cylinder 541 and inserting it into the slot 544 on the inner wall of the support tube 51, thus completing the insertion. The axial locking of the support tube 51 and the insert shell 53 is achieved. The outer end of the insert block 542 is in contact with the inner wall of the slot 544. Under the continuous force of the preload spring 543, the insert block 542 will not detach from the slot 544 on its own, ensuring the connection stability between the support tube 51 and the insert shell 53. Even if the aeration system 4 vibrates during operation, the insertion structure will not loosen. When it is necessary to separate the support tube 51 and the insert shell 53, a pair of insert blocks 542 are pressed from the inside of the support tube 51 towards the center with a tool (overcoming the elasticity of the preload spring 543), so that the outer end of the insert block 542 is detached from the slot 544. At this time, the support tube 51 can be pulled out from the insert shell 53 to complete the unlocking.

[0044] Example 5:

[0045] The difference from Embodiment 4 is that, in this embodiment, in addition to the structural features of the aforementioned embodiments, the plug-in 54 also includes a pair of bottom grooves 546, a pair of side grooves 547, and a pair of pressing plates 548. The pair of bottom grooves 546 are symmetrically opened at the bottom end of the support tube 51 and communicate with the corresponding slot 544. The pair of side plates are symmetrically opened on the side wall of the plug shell 53. The pair of pressing plates 548 are respectively fixed to the outer end of each plug block 542 and slidably inserted in the corresponding bottom groove 546 and side groove 547, with the outer end extending out of the side groove 547.

[0046] In this embodiment of the application, the width of the side groove 547 and the bottom groove 546 is smaller than the diameter of the slot 544.

[0047] like Figures 3 to 6 As shown, due to the above structure, when the support tube 51 needs to be disassembled, the operator presses a pair of pressing plates 548 extending out of the side groove 547 with their fingers or tools. The pressing plates 548 slide along the side groove 547 and the bottom groove 546 toward the center of the support tube 51, causing the fixed insert 542 to retract inward against the elastic force of the preload spring 543, so that the outer end of the insert 542 completely disengages from the slot 544, releasing the lock between the support tube 51 and the insert shell 53. The pressing plates 548 slide in the bottom groove 546 and the side groove 547. The width of the bottom groove 546 and the side groove 547 is smaller than the diameter of the slot 544, which provides a sliding guide for the pressing plates 548 and prevents the insert 542 from being disengaged from the preset position after it is fully retracted into the fixed cylinder 541. When reinstalling the support tube 51, the pressing plates 548 are released, allowing the insert 542 to extend to the preset position. This structure can be unlocked without the aid of tools, simplifying the disassembly and assembly of the aeration system 4.

[0048] The side groove 547 is opened along the insertion direction (vertical direction) of the support tube 51. The outer side of the pressing plate 548 is in contact with the inner wall of the side groove 547 and slides (fitting gap ≤ 0.5mm). When the support tube 51 descends, the pressing plate 548 is constrained by the side groove 547 and can only slide in the vertical direction and cannot rotate. This ensures that the insert 542 is always kept in the radial plane corresponding to the slot 544, avoiding misalignment between the insert 542 and the slot 544 due to slight deviation when the support tube 51 is inserted.

[0049] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0050] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A built-in MBR membrane hospital wastewater treatment device, characterized in that, It includes an equalization tank, an MBR membrane tank, and MBR flat sheet membrane elements. Wastewater in the equalization tank enters the MBR membrane tank through a lift pump. Both the equalization tank and the MBR membrane tank are equipped with an aeration system. The MBR membrane tank contains several MBR flat sheet membrane elements. The equalization tank is equipped with a high liquid level sensor and a low liquid level sensor for controlling the start and stop of the lift pump.

2. The built-in MBR membrane hospital wastewater treatment device according to claim 1, characterized in that, There are two booster pumps.

3. The built-in MBR membrane hospital wastewater treatment device according to claim 1, characterized in that, The aeration system includes aeration pipes, aeration heads, mounting brackets, and support components. The mounting brackets are fixed to the bottom of the equalization tank or MBR membrane tank, and the aeration pipes are mounted on the mounting brackets via the support components.

4. The built-in MBR membrane hospital wastewater treatment device according to claim 3, characterized in that, The support assembly includes a support tube, a locking element, a housing, and a connector. The housing is fixed to the top of the mounting bracket. The top end of the support tube is detachably connected to the aeration pipeline via the locking element, and the bottom end is locked in the housing and detachably connected to the housing via the connector.

5. A built-in MBR membrane hospital wastewater treatment device according to claim 4, characterized in that, The locking component includes a connecting pipe, a strap, a pair of slots, and a pair of notches. The connecting pipe is threaded onto the support pipe and has a bearing shell at the top that adapts to the outer diameter of the aeration pipe. The pair of slots are symmetrically arranged at both ends of the bearing shell, and the pair of notches are arranged in the middle of the slots. Both ends of the strap are engaged with each slot through a locking rod to fix the aeration pipe in the bearing shell.

6. A built-in MBR membrane hospital wastewater treatment device according to claim 5, characterized in that, The support assembly also includes a pair of reinforcing ears, which are symmetrically fixed on the peripheral wall of the connecting pipe and support the bearing shell at the top.

7. A built-in MBR membrane hospital wastewater treatment device according to claim 4, characterized in that, The connector includes a fixed cylinder, a pair of insert blocks, a preload spring, and a pair of slots. The fixed cylinder is fixed to the bottom of the inner cavity of the bearing shell. The pair of slots are symmetrically opened at the lower end of the inner wall of the support tube. The pair of insert blocks are symmetrically inserted into the peripheral wall of the fixed cylinder. The preload spring is disposed between the inner ends of the pair of insert blocks and is used for inserting the outer ends of the insert blocks into the slots.

8. A built-in MBR membrane hospital wastewater treatment device according to claim 7, characterized in that, The connector also includes a guide slope, which is disposed at the bottom of the inner peripheral wall of the support tube, and the outer end faces of the pair of plugs are both inclined.

9. A built-in MBR membrane hospital wastewater treatment device according to claim 7, characterized in that, The connector also includes a pair of bottom grooves, a pair of side grooves and a pair of pressing plates. The pair of bottom grooves are symmetrically opened at the bottom end of the support tube and connect to the corresponding slot. The pair of side grooves are symmetrically opened on the side wall of the insert shell. The pair of pressing plates are respectively fixed to the outer end of each insert block and slidably inserted into the corresponding bottom groove and side groove, with the outer end extending out of the side groove.

10. A built-in MBR membrane hospital wastewater treatment device according to claim 9, characterized in that, The width of the side groove and bottom groove is smaller than the diameter of the slot.

Images