Multifunctional off-line cleaning device for membrane module device

Abstract

The utility model relates to the field of membrane modules, in particular to a multifunctional off-line cleaning device for a membrane module, which comprises a tank body which is divided into a cleaning tank body, an aeration tank body and a bottom column positioned below the tank body, the bottom of the tank body is a cambered surface, a plurality of ultrasonic transducers are arranged in the cleaning tank body, and a plurality of aeration pipelines are arranged in the aeration tank body; the ultrasonic transducers are located in the pool hole, embedded in the peripheral side of the cleaning pool body and distributed in a rectangular ring shape. The aeration pipelines are embedded in the peripheral side of the aeration tank body, are distributed in a rectangular ring shape, are connected with an aeration fan, and are independently provided with regulating valves; according to the utility model, ultrasonic oscillation and oxygenation aeration treatment are carried out in the membrane module device cleaning process, so that the cleaning degree and the cleaning efficiency of the membrane module device are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of membrane module, especially to a multifunctional membrane module off-line cleaning device. BACKGROUND

[0002] The background technology of the membrane module cleaning device mainly relates to membrane bioreactor (MBR) technology and its application. MBR technology is a new type of water treatment technology combining biochemical technology with membrane separation technology, and is widely used in wastewater treatment and water resource recycling fields. MBR membranes are easily contaminated during use, including physical blockage, chemical contamination and biological contamination, resulting in a decrease in membrane flux and treatment efficiency. Regular cleaning of the membrane module can prolong the service life of the membrane, ensure the water quality, and reduce the operating cost.

[0003] Chinese patent publication No. CN210448765U discloses a membrane module off-line cleaning device, which comprises a cleaning pool, an isolation screen and a plurality of adjustable ultrasonic transducers embedded in the bottom plate side of the cleaning pool and distributed in a rectangular ring shape. The adjustable ultrasonic transducer comprises an assembly cavity, a buffer hole, a positioning column sleeve penetrating through the buffer hole, a transducer installed in the top end of the positioning column sleeve and exposed to the inner wall of the bottom plate of the cleaning pool, a corrugated sleeve ring sleeved on the positioning column sleeve, and a swing driver connected with the positioning column sleeve to drive the positioning column sleeve to swing. The utility model utilizes the driving effect of the swing driver on the positioning column sleeve to enable the transducer to swing at a certain angle relative to the cleaning pool, thereby changing the direction of sound wave propagation and making the sound wave better tend to the spatial direction of the membrane module, and further accelerating the cleaning efficiency of the membrane module. Therefore, the membrane module off-line cleaning device has the following problems:

[0004] The cleaning pool can only contain one type of cleaning agent, and the transducer is arranged at the bottom of the pool, which results in a large energy loss. Moreover, the membrane module is not subjected to oxygenation and aeration treatment during the cleaning process. UTILITY MODEL CONTENTS

[0005] Therefore, the utility model provides a multifunctional membrane module off-line cleaning device to overcome the problem that the cleaning pool in the prior art can only contain one type of cleaning agent, the transducer is arranged at the bottom of the pool, which results in a large energy loss, and the membrane module is not subjected to oxygenation and aeration treatment during the cleaning process.

[0006] To achieve the above-mentioned purpose, the utility model provides a multifunctional membrane module off-line cleaning device, which comprises:

[0007] The pool body is divided into a cleaning pool body and an aeration pool body, the bottom of the pool body is arc-shaped, the cleaning pool body and the aeration pool body are divided by a pool plate, and the bottom of the pool body and the inner wall of the side plate of the pool plate close to the cleaning pool are arc-shaped.

[0008] The cleaning pool body contains alkaline medicament, and the membrane group is completely immersed in the alkaline medicament. The cleaning pool body internally comprises a plurality of ultrasonic transducers, which are embedded in the circumferential side of the cleaning pool body and are distributed in a rectangular ring shape. The ultrasonic transducers are divided into high-pressure layer transducers and low-pressure layer transducers on the circumferential side of the cleaning pool body.

[0009] The aeration pool body contains organic acid medicament, and the membrane group is completely immersed in the organic acid medicament. The aeration pool body internally comprises a plurality of aeration pipelines, which are embedded in the circumferential side of the aeration pool body and are distributed in a rectangular ring shape. The aeration pipelines are divided into high-pressure pipelines and low-pressure pipelines on the circumferential side of the aeration pool body.

[0010] The bottom column is located below the pool body and is used to bear the weight of the pool body.

[0011] Further, the low-pressure layer transducers of the ultrasonic transducers are located at the top of the cleaning pool body, and the high-pressure layer transducers are located at the bottom of the cleaning pool body. The setting angle of the high-pressure layer transducers is perpendicular to the pool wall, and the setting angle of the low-pressure layer transducers is inclined downward. The ultrasonic transducers are located in the pool hole, and the connection mode between the pool hole and the ultrasonic transducers is sealed connection.

[0012] Further, the pool bottom of the pool body is recessed in the direction from the inside to the outside of the pool body, and the thickness of the pool bottom gradually decreases from both sides to the middle.

[0013] Further, the low-pressure pipelines of the aeration pipelines are located at the top of the aeration pool body, and the high-pressure pipelines are located at the bottom of the aeration pool body. The pipeline port of the aeration pipeline is provided with a one-way valve, and the communication direction of the one-way valve is from the outside of the aeration pool to the inside of the aeration pool. The aeration pipeline is connected with the aeration fan and is separately provided with an adjusting valve, which is used for separately controlling the oxygenation aeration.

[0014] Further, the aeration pipeline further comprises a corrugated sleeve ring between the hole wall of the buffer through hole, which is used for sealing the gap between the aeration pipeline and the hole wall of the buffer through hole.

[0015] Further, the cleaning pool body and the aeration pool are divided by a pool plate. The inner wall of the side plate of the pool plate near the cleaning pool is arc-shaped, and the arc direction of the inner wall of the side plate of the pool plate is from the inside to the outside of the pool body. The thickness of the pool plate gradually decreases from both sides to the middle.

[0016] Compared with the prior art, the beneficial effects of the utility model lie in that the cavitation effect, acceleration effect and straight flow effect of the ultrasonic wave generated by the transducer in the liquid directly and indirectly act on the cleaning agent and the dirt attached to the membrane module, so that the dirt is dispersed, emulsified and peeled to achieve the cleaning purpose; in order to maximize the utilization degree of the sound wave emitted by the ultrasonic transducer and avoid the situation that most of the sound wave energy generated by the ultrasonic transducer placed at the bottom of the pool is lost from the pool surface, the ultrasonic transducer is embedded in the side of the cleaning pool body, the sound wave energy is circulated between the pool walls, the energy utilization rate of the ultrasonic transducer is improved; meanwhile, the bottom and the pool plate are arranged as arc surfaces close to the inner wall of the side plate of the cleaning pool, the reflection of the sound wave is enhanced, the sound wave forms a stronger oscillation effect in the liquid, the energy distribution is more concentrated, the cleaning efficiency is improved, and the energy utilization rate of the ultrasonic transducer is further improved.

[0017] Further, the aeration during the membrane module cleaning process can increase the dissolved oxygen content in the water, which helps to decompose the biofilm on the membrane surface, prevent biological pollution, enhance the stirring effect of the cleaning liquid, make the cleaning liquid fully contact with the membrane surface, improve the cleaning effect, reduce the blockage of the membrane surface, improve the membrane flux, and thus improve the treatment capacity of the membrane.

[0018] Further, if the aeration pipeline is placed at the bottom of the pool and is affected by the settled sludge, it may be blocked, the utility model adopts the method of placing the aeration pipeline on the pool wall and sealing the gap between the aeration pipeline and the hole wall of the buffer through hole to avoid blockage and affect the cleaning efficiency of the membrane module, and reduce the probability of failure; by setting the regulating valve and using the microporous oxygenation aeration device, the amount of stirring air and the amount of oxygenation air during the aeration process can be flexibly adjusted. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structural schematic view of a multifunctional membrane module offline cleaning device in the utility model embodiment;

[0020] Figure 2 It is a side view sectional schematic view of a multifunctional membrane module offline cleaning device in the utility model embodiment;

[0021] Figure 3 It is a connection schematic view of the ultrasonic transducer and the pool hole in the utility model embodiment;

[0022] Figure 4 It is a connection schematic view of the aeration pipeline and the buffer through hole in the utility model embodiment;

[0023] In the figure: 1-pool body, 11-pool bottom, 12-aeration tank body, 13-cleaning tank body, 14-pool plate, 2-aeration pipeline, 3-ultrasonic transducer, 4-bottom column, 31-pool hole, 32-low pressure layer transducer, 33-high pressure layer transducer, 21-regulating valve, 22-aeration fan, 23-corrugated sleeve ring, 24-one-way valve. DETAILED DESCRIPTION

[0024] In order to make the purpose and advantages of the utility model more clear and apparent, the utility model will be further described below in conjunction with examples; it should be understood that the specific examples described herein are only used to explain the utility model and not to limit the utility model.

[0025] The preferred embodiments of the utility model will be described below with reference to the drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the utility model and not to limit the protection scope of the utility model.

[0026] It should be noted that in the description of the utility model, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the direction or positional relationship terms based on the direction or positional relationship shown in the drawings, which are only for the convenience of description and not to indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0027] In addition, it should also be noted that in the description of the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connection" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0028] Please refer to Figures 1-4 As shown in the figure, Figure 1 It is a structure schematic view of a multifunctional membrane group off-line cleaning device in the embodiment of the utility model; Figure 2 It is a side view sectional schematic view of a multifunctional membrane group off-line cleaning device in the embodiment of the utility model; Figure 3 It is a connection schematic view of an ultrasonic transducer and a pool hole in the embodiment of the utility model; Figure 4 It is a connection schematic view of an aeration pipeline and a buffer through hole in the embodiment of the utility model.

[0029] The utility model provides a kind of multifunctional membrane group off-line cleaning device, comprising:

[0030] The pool body 1 is divided into a cleaning pool body 13 and an aeration pool body 12, the pool bottom 11 of the pool body 1 is arc-shaped, the cleaning pool body 13 and the aeration pool body 12 are divided by a pool plate 14, the pool bottom 11 of the pool body and the inner wall of the side plate of the cleaning pool are arc-shaped.

[0031] The cleaning pool body 13 contains alkali medicament, the membrane group is completely immersed in the alkali medicament, the cleaning pool body 13 internally includes a plurality of ultrasonic transducers 3, the ultrasonic transducers 3 are embedded on the circumferential side of the cleaning pool body 13 and are distributed in a rectangular ring shape, the ultrasonic transducers are divided into high-pressure layer transducers 33 and low-pressure layer transducers 32 on the circumferential side of the cleaning pool body.

[0032] The aeration pool body 12 contains organic acid medicament, the membrane group is completely immersed in the organic acid medicament, the aeration pool body 12 internally includes a plurality of aeration pipelines 2, the aeration pipelines 2 are embedded on the circumferential side of the aeration pool body 12 and are distributed in a rectangular ring shape, the aeration pipelines 2 are divided into high-pressure pipelines and low-pressure pipelines on the circumferential side of the aeration pool body 12.

[0033] The sizes of the cleaning pool body 13 and the aeration pool body 12 are greater than the size of the membrane group, the height is 500mm higher than the height of the membrane filaments of the membrane group, the aeration pool body 12 is provided with perforated aeration pipelines 2 and protection platforms.

[0034] The total depth of the soaking tank is equal to the platform height of the pool bottom 11 plus the height from the bottom of the membrane group to the uppermost membrane filaments plus 500mm of overheight.

[0035] Two liquid storage barrels are arranged on the sides of the cleaning pool body 13 and the aeration pool body 12, the capacities of the liquid storage barrels are greater than the effective volumes of the cleaning pool body 13 and the aeration pool body 12, and the liquid storage barrels are used for repeated use of the cleaning medicament.

[0036] The cleaning pool body 13 and the aeration pool body 12 are matched with a plastic sewage pump, which is used for transferring the medicament from the cleaning pool body 13 and the aeration pool body 12 to the liquid storage barrels or discharging.

[0037] The bottom column 4 is located below the pool body and is used for bearing the weight of the pool body.

[0038] The ultrasonic transducers 3 are embedded on the circumferential side of the cleaning pool body 13 and are distributed in a rectangular ring shape, the ultrasonic transducers 3 are located in pool holes 31, and the connection mode between the pool holes 31 and the ultrasonic transducers 3 is sealed connection.

[0039] The low-pressure layer transducers of the ultrasonic transducers are located at the top of the cleaning pool body, the high-pressure layer transducers are located at the bottom of the cleaning pool body, the setting angle of the high-pressure layer transducers is perpendicular to the pool wall, and the setting angle of the low-pressure layer transducers is inclined downward.

[0040] The pool bottom 11 of the pool body is arc-shaped, the arc-shaped recessed direction is from the inside of the pool body to the outside of the pool body, and the thickness of the pool bottom 11 gradually decreases from the two sides to the middle.

[0041] The cleaning pool body 13 is divided from the aeration pool by the pool plate 14. The pool plate 14 is arc-shaped near the inner wall of the side plate of the cleaning pool, the arc-shaped direction is from the inside of the pool body to the outside of the pool body, and the thickness of the side plate gradually decreases from the two sides to the middle.

[0042] Specifically, the cavitation effect, acceleration effect and straight flow effect of the ultrasonic wave generated by the transducer in the liquid directly or indirectly act on the cleaning agent and the dirt attached to the membrane group, so that the dirt is dispersed, emulsified and peeled off to achieve the cleaning purpose; in order to maximize the utilization of the sound wave emitted by the ultrasonic transducer 3 and at the same time avoid the situation that most of the sound wave energy generated by the ultrasonic transducer placed in the pool bottom 11 is lost from the pool surface, the ultrasonic transducer 3 is embedded in the circumferential side of the cleaning pool body 13, the generated sound wave energy circulates between the pool walls, and the energy utilization rate of the ultrasonic transducer 3 is improved; at the same time, the pool bottom 11 and the inner wall of the side plate of the pool plate 14 near the cleaning pool are arc-shaped, the reflection of the sound wave is enhanced, the sound wave forms a stronger shock effect in the liquid, the energy distribution is more concentrated, the cleaning efficiency is improved, and the energy utilization rate of the ultrasonic transducer 3 is further improved.

[0043] Further, the aeration pipe 2 is embedded in the circumferential side of the aeration pool body 12 and is distributed in a rectangular ring shape. The low-pressure pipe of the aeration pipe is located at the top of the aeration pool body, and the high-pressure pipe is located at the bottom of the aeration pool body. The pipe port of the aeration pipe 2 is provided with a one-way valve 24, and the communication direction of the one-way valve 24 is from the outside of the aeration pool body 12 to the inside of the aeration pool. The aeration pipe 2 is connected with the aeration fan 22 and is separately provided with an adjusting valve 21, and the adjusting valve 21 is used for separately controlling the oxygenation aeration.

[0044] The power of the aeration fan 22 connected with the high-pressure pipe is greater than the power of the aeration fan 22 connected with the low-pressure pipe.

[0045] Further, the aeration pipe 2 further comprises a corrugated sleeve ring 23 between the hole wall of the buffer through hole, and the corrugated sleeve ring 23 is used for sealing the gap between the aeration pipe 2 and the hole wall of the buffer through hole.

[0046] The aeration pipe 2 adopts a DN20 perforated pipe, each membrane gap corresponds to a perforated pipe, the perforation size is Φ2.0mm, the perforation spacing is greater than 40mm, the perforation positions of adjacent two pipes are staggered, the orifice is double-row vertical to the pool wall, and the settled sludge cannot block the orifice.

[0047] The rough estimation of the aeration amount is made according to the experience number, and the aeration fan 22 is selected according to the ratio of 20:1 of air to water, and the highest liquid level is 0.01 Mpa higher than the exhaust pressure head of the aeration fan 22; the aeration fan 22 can be provided with a gas release valve at the outlet, and the air amount can be unloaded by 70% when the gas release pipe is fully opened, and the sound damper is installed on the gas release port.

[0048] Specifically, the aeration during the membrane module cleaning process can increase the dissolved oxygen content in the water, which helps to decompose the biological membrane on the membrane surface, prevent biological pollution, enhance the stirring effect of the cleaning liquid, make the cleaning liquid fully contact with the membrane surface, improve the cleaning effect, reduce the blockage of the membrane surface, improve the membrane flux, and thus improve the treatment capacity of the membrane.

[0049] Meanwhile, if the aeration pipeline 2 is placed on the pool bottom 11 and is affected by the settled sludge, it may be blocked, the utility model avoids the blockage by placing the aeration pipeline 2 on the pool wall and blocking the gap between the aeration pipeline 2 and the hole wall of the buffer through hole, thereby affecting the cleaning efficiency of the membrane module and reducing the probability of failure; by setting the adjusting valve 21 and using the microporous oxygenation aeration device, the stirring air amount and the oxygenation air amount during the aeration process can be flexibly adjusted.

[0050] Work flow: the membrane module is first vertically placed in the cleaning pool body 13, after the membrane module to be cleaned is soaked in the alkali agent, the ultrasonic transducer 3 is started to ultrasonically oscillate the alkali agent, after cleaning, the membrane module is vertically placed in the aeration pool body 12, after the membrane module to be cleaned is soaked in the organic acid agent, the aeration fan 22 is started to aerate and oxygenate the organic acid agent, and the adjusting valve 21 of the aeration pipeline 2 is controlled separately during the aeration and oxygenation process.

[0051] The technical scheme of the utility model has been described in combination with the preferred embodiments shown in the drawings, but those skilled in the art can easily understand that the protection scope of the utility model is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to the related technical features without deviating from the principles of the utility model, and the technical schemes after the changes or replacements will fall within the protection scope of the utility model.

[0052] The above description is only the preferred embodiments of the utility model and is not used to limit the utility model; for those skilled in the art, the utility model can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model shall be included in the protection scope of the utility model.

Claims

1. A multifunctional membrane module offline cleaning device, characterized in that, include: The pool body is divided into a cleaning pool body and an aeration pool body. The bottom of the pool body is an arc surface. The cleaning pool body and the aeration pool body are separated by a pool plate. The bottom of the pool body and the inner wall of the side plate of the pool plate near the cleaning pool body are arc surfaces. The cleaning tank contains an alkaline solution for immersing the membrane module completely in the alkaline solution. The cleaning tank contains several ultrasonic transducers, which are embedded on the periphery of the cleaning tank and distributed in a rectangular ring. The ultrasonic transducers on the periphery of the cleaning tank are divided into high-pressure layer transducers and low-pressure layer transducers. The aeration tank contains organic acid agents for the membrane module to be completely immersed in the organic acid agents. The aeration tank includes several aeration pipes, which are embedded in the periphery of the aeration tank and distributed in a rectangular ring. The aeration pipes on the periphery of the aeration tank are divided into high-pressure pipes and low-pressure pipes. The bottom column, located below the pool body, is used to support the weight of the pool body.

2. The multifunctional membrane module offline cleaning device according to claim 1, characterized in that, The low-pressure layer transducer of the ultrasonic transducer is located at the top of the cleaning tank, and the high-pressure layer transducer is located at the bottom of the cleaning tank. The high-pressure layer transducer is set at an angle perpendicular to the tank wall, and the low-pressure layer transducer is set at an angle tilted downward.

3. The multifunctional membrane module offline cleaning device according to claim 2, characterized in that, The ultrasonic transducer is located inside the pool hole, and the connection between the pool hole and the ultrasonic transducer is a sealed connection.

4. The multifunctional membrane module offline cleaning device according to claim 1, characterized in that, The concave direction of the bottom arc surface of the pool body extends from the inside of the pool body to the outside of the pool body, and the thickness of the bottom of the pool body gradually decreases from both sides to the middle.

5. The multifunctional membrane module offline cleaning device according to claim 1, characterized in that, The low-pressure pipe of the aeration pipe is located at the top of the aeration tank, and the high-pressure pipe is located at the bottom of the aeration tank.

6. The multifunctional membrane module offline cleaning device according to claim 5, characterized in that, The aeration pipe is equipped with a one-way valve at its inlet, and the one-way valve is configured to connect from the outside of the aeration tank to the inside of the aeration tank.

7. The multifunctional membrane module offline cleaning device according to claim 6, characterized in that, The aeration pipe is connected to the aeration blower and is equipped with a separate regulating valve, which is used to control the oxygenation aeration separately.

8. The multifunctional membrane module offline cleaning device according to claim 7, characterized in that, The aeration pipe also includes a corrugated collar between the aeration pipe and the wall of the buffer through hole, the corrugated collar being used to seal the gap between the aeration pipe and the wall of the buffer through hole.

9. The multifunctional membrane module offline cleaning device according to claim 1, characterized in that, The arc surface of the inner wall of the side plate of the pool extends from the inside of the pool to the outside of the pool.

10. The multifunctional membrane module offline cleaning device according to claim 9, characterized in that, The thickness of the pool plate gradually decreases from both sides to the middle.

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