CN218561206U - Efficient and green device for online maintenance cleaning of MBR (membrane bioreactor) membrane by micro-nano bubbles - Google Patents
Efficient and green device for online maintenance cleaning of MBR (membrane bioreactor) membrane by micro-nano bubbles Download PDFInfo
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- CN218561206U CN218561206U CN202222608528.XU CN202222608528U CN218561206U CN 218561206 U CN218561206 U CN 218561206U CN 202222608528 U CN202222608528 U CN 202222608528U CN 218561206 U CN218561206 U CN 218561206U
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Abstract
The utility model belongs to the technical field of water pollution prevention and cure, more specifically say, it relates to a device of MBR membrane is washd to high-efficient green micro-nano bubble online maintainability, include: the MBR membrane tank is used for accommodating all parts; the water inlet tank is arranged inside the MBR membrane tank, and the outer wall of the water inlet tank is provided with a water inlet hole for intercepting suspended matters; the micro-nano bubble generating device is arranged inside the water inlet tank and is used for generating micro-nano bubbles; and the MBR membrane module is arranged inside the MBR membrane tank. The utility model discloses can reduce the low-load power consumption, save medicament running cost, take effect fast, reduce the abluent frequency of off-line, improve system's treatment effeciency, prolong the whole life-span of MBR membrane system.
Description
Technical Field
The utility model belongs to the technical field of water pollution control, more specifically say, it relates to a device of MBR membrane is washd to high-efficient green micro-nano bubble online maintainability.
Background
MBR (Membrane bioreactor) is a new water treatment technology combining a Membrane separation unit and a biological treatment unit. The technology replaces a secondary sedimentation tank with a membrane component, and can carry out high-efficiency solid-liquid separation. In the operation of membrane systems, membrane fouling is a key factor affecting the long-term stable operation of MBR processes. In the process of generating membrane pollution, a mud cake layer consisting of particles, microorganisms and suspended substances deposited on the surface of the membrane is a main factor influencing the membrane pollution and accounts for 60 percent of the total resistance, a gel layer consisting of macromolecular organic matters such as microbial exopolymers, soluble microbial metabolites and the like has the contribution rate of 32 percent to the membrane pollution, and an inorganic scale layer and residual resistance account for 8 percent of the contribution rate to the membrane pollution.
In general, MBR membrane maintenance online cleaning mainly adopts an air aeration cleaning method and a clear water backwashing method to clean sludge and dirt of MBR hollow fiber membranes. The air aeration cleaning is to wash off a mud cake layer on the surface of the membrane by utilizing the circulation and shearing force of water, and the clear water back flushing is to apply a back flushing pressure on a membrane water outlet so that the treated water or the mixed fluid of the treated water and air reversely penetrates through the membrane to be washed.
Although the method can obviously improve the cleaning of the mud cake layer, the removal effect on the gelled layer is not large, especially for a system with serious organic and biological pollution, the organic pollution is generally concentrated in a boundary layer with the water flow rate basically zero, the gas in the region is not easy to reach, the cleaning effect cannot be further improved, the air aeration energy consumption and the water pump energy consumption are large, the off-line cleaning frequency needs to be improved based on the requirement, and the production is stopped.
A special chemical cleaning agent can be added in the clear water backwashing method for cleaning; the special dispensing workshop needs to be configured to match with equipment, pipelines and the like, the investment cost is high, and the chemical agents can influence the physical and chemical characteristics of the membrane filaments, so that the membrane aging process is accelerated, and the service life of the membrane is further shortened.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, the utility model aims to provide a device of MBR membrane is washd to high-efficient green micro-nano bubble online maintainability has the advantage that improves the productivity and prolong the life of MBR membrane.
The above technical purpose of the utility model is realized through following technical scheme, a device of MBR membrane is washd to high-efficient green micro-nano bubble online maintainability, include:
the MBR membrane tank is used for accommodating all parts;
the water inlet tank is arranged inside the MBR membrane tank, and the outer wall of the water inlet tank is provided with a water inlet hole for intercepting suspended matters;
the micro-nano bubble generating device is arranged inside the water inlet tank and is used for generating micro-nano bubbles;
and the MBR membrane module is arranged inside the MBR membrane tank.
In one embodiment, the micro-nano bubble generating device includes:
the water pump is arranged inside the water inlet tank and used for conveying water;
a gas inlet duct for conveying gas;
and the micro-nano bubble generator is communicated with the water outlet end of the water pump and the air outlet end of the air inlet pipeline and used for generating micro-nano bubbles.
In one embodiment, the water inlet hole is provided with a grating.
In one embodiment, a valve is arranged on the air inlet pipeline and used for controlling the air flow entering the micro-nano bubble generator.
In one embodiment, the interior of the micro-nano bubble generator is in a high vacuum state.
In one embodiment, a vacuum pressure gauge is arranged on the air inlet pipeline and used for monitoring the vacuum pressure value in the micro-nano bubble generator.
In one embodiment, the water inlet hole is provided with a plurality of water inlet holes at intervals.
In one embodiment, a water outlet end of the micro-nano bubble generating device is communicated with a water outlet diffuser.
The utility model provides a pair of device of MBR membrane is washd to high-efficient green micro-nano bubble online maintenance nature has following useful part:
firstly, the productivity is improved, the frequency of off-line cleaning is reduced, the device can realize in-situ efficient cleaning, stop water production, obviously reduce the transmembrane pressure difference of the MBR membrane in a short time, delay the rising speed of the transmembrane pressure difference and reduce the frequency of off-line cleaning, thereby improving the productivity;
secondly, the overall service life of the MBR membrane system is prolonged, the attenuation speed of the membrane flux is reduced through deep cleaning of the device, the structural stability of the activated sludge is enhanced, flocculent activated sludge flocs become larger, the filtering separation of the MBR membrane is facilitated, and the service life of the MBR membrane is prolonged;
thirdly, energy conservation and consumption reduction are realized, the operation cost is reduced, the energy consumption, the medicament cost and the labor cost of the water pump are saved, the operation cost is controlled, the device has no noise in operation, is flexible to operate, does not generate secondary pollution, and has good promotion effects on improving the post operation environment and improving the enterprise image;
fourthly, the treatment efficiency of the system is improved, the production benefit is obviously improved, the device can assist the MBR membrane system to improve the treatment efficiency of the system, the hydroxyl free radicals generated by the bubbles in the process of blasting cracking can oxidize the substances which are difficult to degrade, the treated water quality is improved, the sludge yield of the MBR membrane system is reduced, and the production benefit of a sewage treatment plant is obviously improved.
Drawings
FIG. 1 is a schematic view of the structure of the apparatus;
FIG. 2 is a system flow diagram of the present apparatus;
FIG. 3 is a system flow chart of the micro-nano bubble generation device;
FIG. 4 is a flowchart of the steps of the present embodiment;
FIG. 5 is a transmembrane pressure difference change curve diagram of the micro-nano cleaning line and the contrast line of the device.
In the figure: 1. an MBR membrane tank; 2. a water inlet tank; 21. a water inlet hole; 3. a micro-nano bubble generating device; 31. a water pump; 32. an air intake duct; 33. a micro-nano bubble generator; 4. and an MBR membrane module.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description of the present invention, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two unless there is an explicit preferred limitation.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art. In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
An efficient and green device for online maintenance cleaning of MBR (membrane bioreactor) membranes by micro-nano bubbles is shown in figures 1, 2 and 4 and comprises an MBR membrane pool 1, a water inlet tank 2, a micro-nano bubble generating device 3 and an MBR membrane module 4.
Wherein, the MBR membrane tank 1 is used for accommodating all parts; the water inlet tank 2 is arranged inside the MBR membrane tank 1, the outer wall of the water inlet tank 2 is provided with a water inlet hole 21, water in the MBR membrane tank 1 enters the water inlet tank 2 through the water inlet hole 21, and large-volume particles and suspended substances in the MBR membrane tank 1 are intercepted while water enters; the micro-nano bubble generating device 3 is arranged inside the water inlet tank 2 and is used for generating micro-nano bubbles; the MBR membrane module 4 is arranged inside the MBR membrane tank 1.
The micro-nano bubble generating device 3 generates gas-liquid mixed water containing micro-nano bubbles and diffuses the gas-liquid mixed water into the MBR membrane tank 1. The micro-nano bubbles have high-efficiency interface activity and super-strong permeation action and micro-explosive force, and through permeation relaxation and air flotation action, the binding force of sediments and the surface of a substrate is weakened, dirt is adsorbed, residues are taken away, and the effect of cleaning the MBR membrane module 4 in the water tank is achieved.
The micro-nano bubbles have charges on the surfaces, can adsorb more suspended substances such as colloids and the like, can be excited to generate a large amount of hydroxyl radicals at the moment of collapse and rupture, have strong oxidation effect on the hydroxyl radicals, have a chain breaking effect on organic pollutants which are difficult to degrade and remove, and have obvious cleaning effect improvement on MBR membranes due to the high-speed water flow impact of micro-space and the strong-oxidation hydroxyl radicals. And the micro-nano bubble generating device 3 can also enhance the activity of microorganisms in sewage and improve the sewage treatment capacity in the application of an MBR membrane system.
Compare traditional online chemical maintenance nature cleaning mode, the high-efficient washing of normal position just can be realized to micro-nano bubble cleaning technology and adopt the nimble operation of mobile device, resumes the membrane flux of MBR membrane in the short time, and the normal operating of system is guaranteed to the water that does not stop producing. The air-blast aeration and cleaning energy consumption can be saved, chemical cleaning agents and labor cost can be greatly saved, the operation and maintenance cost can be controlled, secondary pollution is not generated by the micro-nano bubble cleaning technology, membrane yarns cannot be damaged at all, the overall service life of the MBR membrane system can be prolonged, sludge can be reduced, the sewage treatment capacity of the MBR membrane process is improved, and the good environment-friendly economic benefit is achieved.
Preferably, as shown in fig. 1 and 3, the micro-nano bubble generating device 3 includes a water pump 31, an air inlet pipe 32, and a micro-nano bubble generator 33.
Wherein, the water pump 31 is arranged inside the water inlet tank 2 and used for conveying water; the gas inlet duct 32 is used for conveying gas; the micro-nano bubble generator 33 is communicated with the water outlet end of the water pump 31 and the air outlet end of the air inlet pipeline 32, and is used for generating micro-nano bubbles.
Preferably, as shown in fig. 1, the water inlet hole 21 is provided with a grating to further intercept the floating objects in the water.
Preferably, a valve is arranged on the air inlet pipeline 32 and used for controlling the air flow entering the micro-nano bubble generator 33.
Further, the interior of the micro-nano bubble generator 33 is in a high vacuum state, and can suck gas to generate decompression and acceleration, and a high-speed gas flow is formed along with the rotation and backflow. The air inlet pipe 32 is further provided with a vacuum pressure gauge for monitoring a vacuum pressure value in the micro-nano bubble generator 33.
Further, as shown in fig. 1, a plurality of water inlet holes 21 are provided at intervals.
Preferably, the water outlet end of the micro-nano bubble generating device 3 is communicated with a water outlet diffuser. The outlet diffuser sprays the micro-nano bubbles generated by the micro-nano bubble generator 33 into the MBR membrane tank 1, and the outlet end of the outlet diffuser can be designed to be wide-mouthed so that the micro-nano bubbles act on the MBR membrane module 4, so that the spraying effect is better.
As shown in fig. 1 to 4, in this embodiment, the operation mode of the apparatus is as follows: (1) Water enters the water inlet tank 2 through the water inlet hole 21 and is conveyed to the micro-nano bubble generator 33 under the action of the water pump 31; (2) The gas enters the gas inlet pipeline 32 and enters the micro-nano bubble generator 33 through negative pressure self-suction; (3) The micro-nano bubble generator 33 fully mixes water pumped by the water pump 31 and gas introduced from the gas inlet pipeline 32, the gas rotates and flows back to form high-speed vortex in a high-vacuum state of the micro-nano bubble generator 33, and the high-speed rotation mixing is sprayed in pressurized water to form micro-nano bubbles; (4) The micro-nano bubbles generated by the micro-nano bubble generator 33 are sprayed into the MBR membrane tank 1 through the water outlet diffuser and are uniformly mixed in water, and the effect of efficiently cleaning the MBR membrane module 4 is achieved by utilizing the characteristics of high-efficiency interfacial activity, super-strong osmosis, hydroxyl radical generation and the like.
As shown in fig. 5, the cleaning effect of the present example was verified by a specific test. After the cleaning device is applied to an MBR membrane process, transmembrane pressure difference changes before and after micro-nano bubble cleaning are observed.
After the device for cleaning the MBR membrane in an efficient and green online maintenance manner is installed, the transmembrane pressure difference of the micro-nano lines is obviously reduced, and is stably kept at about 18.30KPa, which is 1-2KPa lower than that of a cleaning contrast line; after the test device runs for half a year, the transmembrane pressure difference of the micro-nano lines is still stably maintained at about 18.50KPa under the trend of water quantity increase, the transmembrane pressure difference of the contrast lines is about 27KPa, and is about 8.5KPa lower than that of the contrast lines, so that the obvious effect of online maintainability cleaning is verified.
The above embodiments only represent several embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (8)
1. The utility model provides a device of MBR membrane is washd to high-efficient green micro-nano bubble online maintainability which characterized in that includes:
the MBR membrane tank is used for accommodating all parts;
the water inlet tank is arranged inside the MBR membrane tank, and the outer wall of the water inlet tank is provided with a water inlet hole for intercepting suspended matters;
the micro-nano bubble generating device is arranged inside the water inlet tank and is used for generating micro-nano bubbles;
and the MBR membrane module is arranged inside the MBR membrane tank.
2. The device for the efficient and green online maintenance cleaning of the MBR membrane by the micro-nano bubbles according to claim 1, wherein the micro-nano bubble generating device comprises:
the water pump is arranged inside the water inlet tank and used for conveying water;
the gas inlet pipeline is used for conveying gas;
and the micro-nano bubble generator is communicated with the water outlet end of the water pump and the air outlet end of the air inlet pipeline and used for generating micro-nano bubbles.
3. The device of claim 1 for online maintenance cleaning of MBR membranes by efficient green micro-nano bubbles, which is characterized in that: the water inlet hole is provided with a grid.
4. The device of claim 2 for online maintenance cleaning of the MBR membrane by the efficient green micro-nano bubbles, which is characterized in that: and a valve is arranged on the air inlet pipeline and used for controlling the air quantity entering the micro-nano bubble generator.
5. The device for the efficient and green online maintenance cleaning of the MBR membrane by the micro-nano bubbles according to claim 2, is characterized in that: the interior of the micro-nano bubble generator is in a high vacuum state.
6. The device of claim 5 for online maintenance cleaning of the MBR membrane by the efficient green micro-nano bubbles, which is characterized in that: and a vacuum pressure gauge is arranged on the air inlet pipeline and used for monitoring the vacuum pressure value in the micro-nano bubble generator.
7. The device for the efficient and green online maintenance cleaning of the MBR membrane by the micro-nano bubbles according to claim 1, is characterized in that: the inlet opening interval is provided with a plurality ofly.
8. The device of claim 1 for online maintenance cleaning of MBR membranes by efficient green micro-nano bubbles, which is characterized in that: and the water outlet end of the micro-nano bubble generating device is communicated with a water outlet diffuser.
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| CN202222512783 | 2022-09-22 | ||
| CN2022225127834 | 2022-09-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115417498A (en) * | 2022-09-22 | 2022-12-02 | 广东汇祥环境科技有限公司 | Efficient and green device and method for online maintainable cleaning of MBR (membrane bioreactor) membrane by micro-nano bubbles |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115417498A (en) * | 2022-09-22 | 2022-12-02 | 广东汇祥环境科技有限公司 | Efficient and green device and method for online maintainable cleaning of MBR (membrane bioreactor) membrane by micro-nano bubbles |
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