CN112194243A - An integrated synchronous pulse aeration device - Google Patents
An integrated synchronous pulse aeration device Download PDFInfo
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- CN112194243A CN112194243A CN202011262137.6A CN202011262137A CN112194243A CN 112194243 A CN112194243 A CN 112194243A CN 202011262137 A CN202011262137 A CN 202011262137A CN 112194243 A CN112194243 A CN 112194243A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1268—Membrane bioreactor systems
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/20—Activated sludge processes using diffusers
- C02F3/201—Perforated, resilient plastic diffusers, e.g. membranes, sheets, foils, tubes, hoses
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
Abstract
本发明涉及膜过滤系统应用技术领域，尤其涉及了一种一体式同步脉冲曝气装置，包括布气槽，其顶板下空间分隔成若干压力损失相同的长度不同的气流均分通道，通道下设密封板，布气槽侧壁气流均分通道的下方开有均匀排布的出气孔，布气槽上方设置若干个内腔体积相同的集气盒，各集气盒内设置一个相同的集气杯，集气杯内设置竖直的曝气管，曝气管出气口上方设置分流挡板，其与集气盒之间的空间形成曝气分流通道，分隔集气盒的各个挡气板上开有补气孔，补气孔位置高于曝气管的进气口。本发明的一种一体式同步脉冲曝气装置，仅需较小流量的气流即可实现在同片膜片底部同步瞬间产生大气泡的脉冲曝气效果，具有结构可靠，曝气效果好，使用寿命长的优点。
The invention relates to the technical field of membrane filtration system application, in particular to an integrated synchronous pulse aeration device, comprising an air distribution groove, the space under the top plate is divided into a plurality of air distribution channels with the same pressure loss and different lengths. On the sealing plate, there are evenly arranged air outlet holes under the air distribution channel on the side wall of the air distribution groove, and several air collecting boxes with the same inner cavity volume are arranged above the air distribution groove. A vertical aeration pipe is arranged in the aeration cup, and a shunt baffle is set above the air outlet of the aeration pipe. There is a supplementary air hole, and the position of the supplementary air hole is higher than the air inlet of the aeration pipe. The one-piece synchronous pulse aeration device of the present invention only needs a small flow of airflow to achieve the pulse aeration effect of synchronizing and instantaneously generating large bubbles at the bottom of the same diaphragm, and has the advantages of reliable structure and good aeration effect. The advantage of long life.
Description
Technical Field
The invention relates to the technical field of application of membrane filtration systems, in particular to an integrated synchronous pulse aeration device for a scrubbing filtration membrane system.
Background
The MBR membrane bioreactor is a novel sewage treatment technology organically combining an efficient membrane separation technology and an activated sludge technology, and compared with the traditional biological wastewater treatment technology, the MBR membrane bioreactor technology has the advantages of good water quality of produced water, small floor area, high automation degree and the like. The main reasons that hinder the application and popularization of MBR process in sewage treatment at present are: the energy consumption is higher than that of the traditional process, the membrane pollution problem and the cost required by membrane replacement are high; among them, the influence of high energy consumption is particularly serious.
From the main energy consumption source of the MBR process, the total energy consumption is 60-80% of the total energy consumption by membrane scrubbing aeration and biochemical process aeration. The membrane scrubbing in the MBR process is to form cross flow on the membrane surface by means of stirring of air bubbles during aeration to generate shearing force and disturbing force, so that large particles such as suspended matters, biological aggregates and the like are separated from the membrane surface under the action of force, and the membrane surface is cleaned.
In the MBR process, in order to alleviate the pollution of the membrane, in the prior art, the membrane surface is mostly flushed by continuous aeration, i.e. the membrane is continuously aerated. The continuous aeration mode has the following problems: firstly, the operation energy consumption is increased, and the continuous aeration stirring forms cross flow on the membrane surface to generate shearing force and disturbance force which are too small, so that the scouring effect is not ideal; on the other hand, the larger aeration quantity makes the mixed liquor dissolve excessive oxygen, which is very unfavorable for the former denitrification reaction and can not better achieve the denitrification effect.
The pulse aeration device in the prior art can accumulate continuous and stable airflow, can instantly generate pulse aeration of high-flow and large-bubble when the gas is accumulated to a set amount, and can break deposits such as scaling films, colloids and the like accumulated on the membrane and separate from the surface of the membrane by the aeration, so that the energy-saving and efficient pulse aeration becomes the best choice for a membrane scrubbing process. However, in the conventional MBR process adopting the pulse aeration devices, each pulse aeration device is of an independent structure, and the air distribution pipes for supplying air to each pulse aeration device cannot uniformly supply air, so that the time required by each pulse aeration device for generating pulse aeration is extremely inconsistent, and the pulse aeration devices under the same membrane cannot simultaneously generate pulse aeration, so that the performance of the pulse aeration device is not fully exerted, and meanwhile, the air distribution pipes mostly supply air by adopting a mode of forming small holes in a circular pipe, so that the mode is extremely easy to generate sludge in the pipeline, and further unevenness of air supply is caused by blocking the pipeline.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the integrated synchronous pulse aeration device which can realize the pulse aeration effect of synchronously and instantly generating large bubbles at the bottom of the same membrane only by using small-flow airflow and can effectively avoid the problem of aeration failure caused by air passage blockage caused by sludge deposition, thereby prolonging the service life of the device.
In order to achieve the purpose, the invention adopts the following technical scheme:
an integrated synchronous pulse aeration device comprises an aeration pipe, a gas collecting box and a gas distribution groove with an air inlet channel, wherein the top plate and four side walls of the gas distribution groove are closed, a plurality of airflow separation plates vertical to the top plate are connected below the top plate, the airflow separation plates divide the upper space of the gas distribution groove into a plurality of airflow equal distribution channels consistent with the air inlet direction, the pressure loss of each airflow equal distribution channel is the same, the rear end parts of the airflow separation plates are uniformly arranged along the air inlet direction, a sealing plate is further arranged, the bottom of each airflow separation plate is sealed by the sealing plate, and the length of each airflow equal distribution channel of the sealing plate is the same as that of the airflow separation plate at the position; the side wall of the air distribution groove is provided with air outlet holes, the air outlet holes are linearly and uniformly distributed along the air inlet direction, and the positions of the air outlet holes are positioned below the air flow equalizing channel;
the gas distribution groove is provided with a plurality of gas collecting boxes above, the gas collecting boxes are uniformly arranged along the gas inlet direction of the gas distribution groove, the inner cavity of each gas collecting box is the same in volume, a same gas collecting cup is arranged in each gas collecting box, a vertical aerator pipe is arranged in each gas collecting cup, the pipe diameter and the length of each aerator pipe are the same, a shunting baffle is arranged above each gas collecting box corresponding to the gas outlet of each aerator pipe and is perpendicular to each aerator pipe, the space between each shunting baffle and each gas collecting box forms an aeration shunting channel, each gas baffle for separating the gas collecting boxes is provided with a gas supplementing hole, and the position of each gas supplementing hole is higher than the gas inlet of each aerator pipe.
The rear end parts of the airflow separation plates are arranged at different positions where airflow needs to enter, so that the lengths of the airflow separation plates are different, but because the pressure loss of each airflow equal-dividing channel is the same, the air flows in from the air inlet channel, the air evenly flows into a plurality of different parts of the air distribution groove after being divided by the enclosed air equal-dividing channels, the air is accumulated in the air distribution groove to enable the liquid surface below to continuously move downwards, because the air flowing into the air distribution groove evenly flows in from the plurality of parts of the air distribution groove, the liquid surface in the air distribution groove is always kept horizontal until the liquid surface is lower than the air outlet holes, the air flows out from the air outlet holes with the same horizontal plane and the same size, the air outlet amount of each air outlet hole is kept consistent at the moment, and the air is evenly supplied to each air collection box above.
The volumes of the inner cavities of the gas collecting boxes are the same, so that the pulse aeration quantity generated by each gas collecting box is the same. The diameter and the height of the cup of the gas collecting cup are the same, so that the space utilization rate of the inner cavity of each gas collecting box is kept consistent.
Because the water level in the gas collecting boxes fluctuates and other reasons, the gas quantity accumulated in each gas collecting box deviates, because the positions of the gas supplementing holes are higher than the lower end face of the aeration pipe, when pulse aeration is not generated in the gas collecting boxes, the gas in each gas collecting box is complemented through the gas of the gas supplementing holes, so that the gas storage quantity in each gas collecting box is kept consistent, when the liquid level is uniformly reduced to the gas inlet of the lower end face of the aeration pipe, the gas accumulated in each gas collecting box is synchronously and instantly discharged from the aeration pipe according to the hydraulics principle, because the pipe diameters and the lengths of the aeration pipes are kept consistent, the strength and the initial speed of the pulse aeration generated by each gas collecting box are kept consistent, and the discharged gas is uniformly discharged through the aeration diversion channel after being drained by the diversion baffle, so as to form synchronous large-bubble pulse aeration. The process is then recirculated to form a continuous, synchronized pulse aeration.
The aeration device can realize the pulse aeration effect of synchronously and instantly generating large bubbles at the bottom of the same membrane only by using airflow with smaller flow; and can effectively avoid the problem of aeration failure caused by air flue blockage caused by sludge deposition, and prolong the service life of the device.
Preferably, the drift diameter of the air flow equal-dividing channel is in negative correlation with the length, the drift diameter of a single channel is 3-50 mm, and the number of the air flow equal-dividing channels is 2-10. The drift diameter of the gas equalizing channel is gradually reduced along with the gradual increase of the length of the gas equalizing channel, and the drift diameter of the gas equalizing channel is calculated according to the pressure loss of the channel so as to keep the same pressure loss of each gas flow equalizing channel.
Preferably, the aperture sizes of the air outlet holes are the same, and the aperture can be set between 2 mm and 15 mm. The gas can be discharged from all the gas outlets at the same time, and the pressure loss of the gas passing through each gas outlet is kept consistent, so that the gas discharge quantity of each gas outlet is kept consistent.
Preferably, the number of the gas collecting boxes is 2-8. The pulse aeration can be generated by pulse aeration, so that the single membrane can be completely covered.
Preferably, the pore size of the air supply hole is 2-10 mm. The gas complementary amount of each gas collecting box is ensured to be always smaller than the gas inflow of a single gas collecting box.
Preferably, the aeration branch channels are all located on the same straight line. The shearing force formed by pulse aeration generated by each gas collecting box is more concentrated, and the membrane wire disturbance effect is more effective.
Preferably, the bottom of the gas distribution groove is of an open structure. The bottom open type structure can avoid the problem of mud accumulation and blockage of the gas distribution groove.
The integrated synchronous pulse aeration device can realize the pulse aeration effect of synchronously and instantly generating large bubbles at the bottom of the same membrane only by using airflow with smaller flow, can effectively avoid the problem of aeration failure caused by air passage blockage caused by sludge deposition, and has the advantages of reliable structure, good aeration effect and long service life.
Drawings
FIG. 1 is a schematic perspective view of an integrated synchronous pulse aeration apparatus according to an embodiment of the present invention.
Fig. 2 is a sectional view a-a of fig. 1.
Fig. 3 is a schematic structural view of the air distribution groove in fig. 2.
Fig. 4 is a schematic view of the internal structure of the gas distribution tank.
FIGS. 5a to 5d are schematic diagrams illustrating a pulse aeration synchronous forming process of an integrated synchronous pulse aeration device according to an embodiment of the present invention.
FIG. 1, an intake passage; 2. an airflow sharing channel; 3. a gas distribution groove; 4. an air outlet; 5. a gas collection box; 6. an aeration pipe; 7. a gas collecting cup; 8. a gas baffle; 9. air hole supplement; 10. a flow dividing baffle; 11. a sealing plate; 12. an aeration flow-dividing channel; 13. an airflow divider plate; 14. a top plate; 15. a side wall; 16 outer shell.
Detailed Description
The invention will be further described with reference to fig. 1-5 and the detailed description.
An integrated synchronous pulse aeration device is shown in figures 1 and 2 and comprises an aeration pipe 6, a gas collecting box 5 and a gas distribution groove 3 with a gas inlet channel 1, as shown in figure 4, a top plate 14 and four side walls 15 of the gas distribution groove 3 are closed, the bottom of the gas distribution groove is of an open structure, a plurality of airflow division plates 13 vertical to the top plate 14 are connected below the top plate 14, the airflow division plates 13 divide the upper space of the gas distribution groove 3 into a plurality of airflow equal-distribution channels 2 consistent with the gas inlet direction, the pressure loss of each airflow equal-distribution channel 2 is the same, the rear end parts of the airflow division plates 13 are uniformly arranged along the gas inlet direction, a sealing plate 11 is further arranged, the bottom of the airflow division plates 13 is sealed by the sealing plate 11, and the length of the sealing plate 11 in each airflow equal-distribution channel 2 is the same as; as shown in the attached fig. 2 and 3, the side wall of the air distribution groove 3 is provided with air outlet holes 4, the air outlet holes 4 are uniformly arranged along the air inlet direction in a straight line, and the positions of the air outlet holes 4 are positioned below the air flow equalizing channel 2;
as shown in fig. 2, a plurality of gas collecting boxes 5 are arranged above the gas distribution groove 3, the gas collecting boxes 5 are uniformly arranged along the gas inlet direction of the gas distribution groove 3, the volume of the inner cavity of each gas collecting box 5 is the same, a same gas collecting cup 7 is arranged in each gas collecting box 5, a vertical aeration pipe 6 is arranged in each gas collecting cup 7, the pipe diameters and the lengths of the aeration pipes 6 are the same, a diversion baffle 10 is horizontally arranged above each gas collecting box 5 corresponding to the gas outlet of the aeration pipe 6, as shown in fig. 1, the diversion baffle 10 is connected with a shell 16 of the aeration device, the diversion baffle 10 is perpendicular to the aeration pipe 6, an aeration diversion channel 12 is formed in the space between the diversion baffle 10 and the gas collecting box 5, each gas baffle 8 for separating the gas collecting boxes 5 is provided with a gas supplementing hole 9, and the position of the gas supplementing hole 9 is.
The drift diameter of the air flow equal-dividing channel 2 is negatively related to the length, the drift diameter of a single channel is 3-50 mm, the number of the air flow equal-dividing channels 2 is 8, the aperture of the air outlet hole 4 is the same, the aperture can be set to 10mm, the number of the air collecting boxes 5 is 8, the aperture of the air supply hole 9 is 6mm, and the aeration flow dividing channels (12) are all located on the same straight line.
As shown in the attached figures 5a-5d, the pulse aeration synchronous forming process of the integrated synchronous pulse aeration device of the embodiment is schematically shown.
The gas is uniformly supplied to each gas collecting box 5 above from the gas distribution groove 3, and the gas amount accumulated in each gas collecting box 5 deviates due to the fluctuation of the water level in the gas collecting box 5 and other reasons, as shown in fig. 5a, the liquid level is uneven; the gas in each gas collecting box is complemented through the gas of the gas supplementing hole 9, so that the gas storage amount in each gas collecting box 5 is kept consistent, as shown in figure 5b, the liquid level is kept consistent at the moment, the liquid level of the gas collecting boxes 5 continuously descends along with the increase of the gas amount, when the liquid level is uniformly reduced to the gas inlet of the lower end face of the aeration pipe 6, as shown in figure 5c, the gas stored in each gas collecting box 5 is synchronously and instantaneously discharged from the aeration pipe 6 according to the hydraulics principle, and large pulse aeration is formed; as the gas bursts, the liquid level below the gas distribution groove begins to rise, and the next circulation is carried out after the gas in the gas distribution groove 3 enters.
In summary, the present invention is only a preferred embodiment, and is not intended to limit the scope of the invention, and all equivalent changes and modifications made in the content of the claims should be considered as the technical scope of the invention.
Claims (7)
1. The utility model provides a synchronous pulse aeration equipment of integral type, includes aeration pipe (6), gas collection box (5), has gas distribution groove (3) of inlet channel (1), its characterized in that: the top plate (14) and four side walls (15) of the air distribution groove (3) are closed, a plurality of airflow separation plates (13) vertical to the top plate (14) are connected below the top plate (14), the airflow separation plates (13) separate the upper space of the air distribution groove (3) into a plurality of airflow equal-dividing passages (2) consistent with the air inlet direction, the pressure loss of each airflow equal-dividing passage (2) is the same, the rear end parts of the airflow separation plates (13) are uniformly arranged along the air inlet direction, a sealing plate (11) is further arranged, the bottom of each airflow separation plate (13) is sealed by the sealing plate (11), and the length of each airflow equal-dividing passage (2) of each sealing plate (11) is the same as that of the airflow separation plate (13) at the position; the side wall of the air distribution groove (3) is provided with air outlet holes (4), the air outlet holes (4) are linearly and uniformly distributed along the air inlet direction, and the positions of the air outlet holes (4) are positioned below the air flow equalizing channel (2);
the gas distribution tank is characterized in that a plurality of gas collecting boxes (5) are arranged above the gas distribution tank (3), the gas collecting boxes (5) are uniformly arranged along the gas inlet direction of the gas distribution tank (3), the volume of the inner cavity of each gas collecting box (5) is the same, a same gas collecting cup (7) is arranged in each gas collecting box (5), vertical aeration pipes (6) are arranged in each gas collecting cup (7), the pipe diameters and the lengths of the aeration pipes (6) are the same, a diversion baffle (10) is arranged above each gas collecting box (5) and in a position corresponding to the gas outlet of each aeration pipe (6), the diversion baffle (10) is perpendicular to each aeration pipe (6), an aeration diversion channel (12) is formed in the space between the diversion baffle (10) and each gas collecting box (5), gas supplementing holes (9) are formed in each gas baffle (8) for separating the gas collecting boxes (5), and the gas supplementing holes (9) are higher than the gas.
2. The integrated synchronous pulse aeration apparatus according to claim 1, wherein: the drift diameter of the air flow equal-dividing channels (2) is in negative correlation with the length, the drift diameter of a single channel is 3-50 mm, and the number of the air flow equal-dividing channels (2) is 2-10.
3. The integrated synchronous pulse aeration apparatus according to claim 1, wherein: the aperture size of the air outlet (4) is the same, and the aperture can be set between 2-15 mm.
4. The integrated synchronous pulse aeration apparatus according to claim 1, wherein: the number of the gas collecting boxes (5) is 2-8.
5. The integrated synchronous pulse aeration apparatus according to claim 1, wherein: the pore size of the air supply hole (9) is 2-10 mm.
6. The integrated synchronous pulse aeration apparatus according to claim 1, wherein: the aeration flow-dividing channels (12) are all positioned on the same straight line.
7. The integrated synchronous pulse aeration apparatus according to claim 1, wherein: the bottom of the air distribution groove (3) is of an open structure.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011262137.6A CN112194243A (en) | 2020-11-12 | 2020-11-12 | An integrated synchronous pulse aeration device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011262137.6A CN112194243A (en) | 2020-11-12 | 2020-11-12 | An integrated synchronous pulse aeration device |
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| CN112194243A true CN112194243A (en) | 2021-01-08 |
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| CN202011262137.6A Withdrawn CN112194243A (en) | 2020-11-12 | 2020-11-12 | An integrated synchronous pulse aeration device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114394663A (en) * | 2022-03-01 | 2022-04-26 | 浙江长兴求是膜技术有限公司 | Gas distribution device |
| CN114751505A (en) * | 2022-04-19 | 2022-07-15 | 宁波水艺膜科技发展有限公司 | Pulse aeration device with safety gap |
| CN115959786A (en) * | 2022-12-20 | 2023-04-14 | 天津膜天膜科技股份有限公司 | Spiral-flow pulse type aerator and MBR (membrane bioreactor) membrane system |
| CN116102161A (en) * | 2022-12-06 | 2023-05-12 | 北京时远科技有限公司 | Large-bubble pulse aeration device, membrane bioreactor and working method |
| WO2024193117A1 (en) * | 2023-03-22 | 2024-09-26 | 海南立昇净水科技实业有限公司 | Aerator, and submerged membrane assembly and submerged membrane filtration device including same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114394663A (en) * | 2022-03-01 | 2022-04-26 | 浙江长兴求是膜技术有限公司 | Gas distribution device |
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| CN115959786A (en) * | 2022-12-20 | 2023-04-14 | 天津膜天膜科技股份有限公司 | Spiral-flow pulse type aerator and MBR (membrane bioreactor) membrane system |
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| WO2024193117A1 (en) * | 2023-03-22 | 2024-09-26 | 海南立昇净水科技实业有限公司 | Aerator, and submerged membrane assembly and submerged membrane filtration device including same |
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Application publication date: 20210108 |