CN209906444U - Membrane siphon goes out water MBR device - Google Patents
Membrane siphon goes out water MBR device Download PDFInfo
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- CN209906444U CN209906444U CN201920417563.9U CN201920417563U CN209906444U CN 209906444 U CN209906444 U CN 209906444U CN 201920417563 U CN201920417563 U CN 201920417563U CN 209906444 U CN209906444 U CN 209906444U
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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
Abstract
The utility model discloses a membrane siphon goes out water MBR device, including device casing and clear water bucket, still include: the membrane aeration device is arranged in each membrane component, and the main aeration device and all the membrane aeration devices are externally connected with a fan; and a water inlet of the membrane siphon water outlet pipe is connected with a water outlet of the membrane component, a water outlet of the membrane siphon water outlet pipe is connected into the clear water barrel, and the height of the clear water barrel is lower than the height of the liquid level in the device. The utility model discloses a membrane siphon outlet pipe carries out the siphon and goes out water, need not the energy consumption, consequently the energy consumption is low, no power consumption goes out water.
Description
Technical Field
The invention belongs to the field of sewage treatment devices, and particularly relates to a membrane siphon water outlet MBR device.
Background
Water is an important factor for economic development and social sustainable development, and with the enlargement of urban scale, industrial development and population growth, the problem of water pollution becomes a difficult problem which must be solved at present.
An integrated Membrane Bioreactor (MBR) is a novel process which is started in recent years, and the process comprises the steps of placing a membrane component in a bioreactor, obtaining membrane filtered water through negative pressure suction of a process pump, and using the membrane component with a hollow fiber membrane, a tubular membrane and a flat membrane. In the MBR process, the membrane module replaces a secondary sedimentation tank in the traditional activated sludge method, so that the problems that the water quality in the effluent water is not stable enough and the sludge is easy to swell in the traditional process are solved. Patent CN201410805456 discloses an MBR sewage treatment process, which has the characteristics of small equipment, high efficiency and the like, and has a good treatment effect on low-concentration COD wastewater, but the MBR device still adopts a water outlet mode of a traditional suction pump to suck outlet water, so that the energy consumption is high, and the operation cost is high. Patent CN201621271742 discloses a low energy consumption self-flowing membrane bioreactor, the water outlet mode of the MBR device is membrane self-flowing water, which can effectively reduce energy consumption, but the device needs higher potential difference and cannot be widely applied.
SUMMERY OF THE UTILITY MODEL
The utility model provides a membrane siphon goes out water MBR device carries out the siphon through membrane siphon outlet pipe and goes out water, need not the energy consumption, therefore the energy consumption is low, no power consumption goes out water.
The utility model provides a membrane siphon goes out water MBR device, includes device casing and clear water bucket, still includes:
the membrane aeration device is arranged in each membrane component, and the main aeration device and all the membrane aeration devices are externally connected with a fan;
a water inlet of the membrane siphon water outlet pipe is connected with a water outlet of the membrane component, a water outlet of the membrane siphon water outlet pipe is connected into the clear water bucket, and the height of the clear water bucket is lower than the height of the liquid level in the device;
a first electric valve is arranged on the pipe section on the membrane siphon water outlet pipe and outside the device shell; and two sides of the first electric valve are provided with a section of branch connected with the first electric valve in parallel, and the branch is provided with a membrane suction pump and a second electric valve.
Preferably, the membrane siphon water outlet device further comprises a backwashing pump, an inlet of the backwashing pump is connected with the clean water barrel through a pipeline, an outlet of the backwashing pump is connected into the membrane siphon water outlet pipe, and a third electric valve is arranged on the inlet pipeline.
The water outlet of each group of membrane modules is connected with one end of a siphon water outlet pipe, the other end of the siphon water outlet pipe is divided into three branches, the first branch is connected with the water outlet of the clear water barrel, a backwashing pump and a third electric valve are arranged on the first branch, a first electric valve is arranged on the second branch, a membrane suction pump and a second electric valve are arranged on the third branch, and the second branch and the third branch are both connected with the water inlet of the clear water barrel.
Preferably, still include the equipment room, power supply, clear water bucket, membrane suction pump, backwash pump, first motorised valve, second motorised valve and third motorised valve all locate in this equipment room.
Preferably, the membrane module comprises a membrane module body, and a water outlet is arranged on the membrane module body; the membrane aeration device is positioned at the bottom of the membrane module body.
Preferably, the membrane aeration device is a perforated aeration pipe, and the aperture of the aeration pipe is 1-3 mm.
Preferably, when the membrane modules are arranged into more than two groups, the membrane modules are sequentially arranged along the horizontal direction; the main aeration device is arranged between the adjacent membrane components. Wherein, 1 pair of membrane modules are respectively arranged at two ends of the device shell close to the side wall, and the rest membrane modules are uniformly arranged between the two groups of membrane modules.
Preferably, when the membrane modules are in two groups, the membrane modules are respectively arranged close to two opposite side walls of the device shell, and the main aeration devices are arranged at the bottom between the membrane modules and are arranged in two groups.
Preferably, the height difference between the height of the clear water barrel and the height of the liquid level in the MBR is 0.5-2.0 m. The height difference is too small, so that the water outlet pressure is insufficient, the construction difficulty is high when the height difference is too large, and the geographical position is difficult to realize.
Preferably, the pipe diameter P of the membrane siphon water outlet pipe is Q x (1.5-2.5)2Q is in m3The flow rate calculated by/h, the unit of the pipe diameter is mm, and the pipe diameter does not exceed DN150 at most.
Pipe diameter P (mm) and flow rate Q (m)3H) positive correlation with pipe diameter P ═ Q × (1.5 to 2.5)2But not to exceed DN150 at maximum. The flow is positively correlated with the pipe diameter, if the pipe diameter is too small during large flow, the flow speed of the discharged water is too high, and the on-way resistance is increased. Too large pipe diameter can lead to air leakage in the pipeline in the water outlet process, and destroy the siphon effect.
Preferably, the device housing is preferably an elongated box.
Compared with the traditional sewage treatment device and method, the invention has the following advantages:
(1) the membrane siphon water outlet pipe is used for siphoning water, and energy consumption is not needed, so that the energy consumption is low, and no electricity is consumed for water outlet;
(2) in the process of siphon water outlet, a motor or a pump is not needed to work, so that the water outlet is quiet and has no noise;
(3) compared with pumping, the siphon effluent has smaller influence on the membrane component, can ensure that the membrane component discharges water under stable negative pressure, and prolongs the service life of the membrane component;
(4) membrane assemblies at two ends of the device and a membrane aeration device below the membrane assemblies are used for alternately aerating, so that aerobic and anaerobic areas can be alternately formed in the device, an aeration blind area does not exist, and the sludge accumulation condition is not easy to generate.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a schematic view of the assembly structure of the membrane module and the membrane aeration device of the present invention.
The reference numerals shown in the figures are as follows:
1-fan 2-membrane component 3-membrane aeration device
4-main aeration device 5-membrane suction pump 6-clear water barrel
7-backwashing pump 8-first electric valve 9-second electric valve
10-third electric valve 11-device shell 12-equipment room
201-membrane module body 202-water outlet 301-air inlet
Detailed Description
The invention will be further elucidated and described with reference to the drawings and the detailed description. The technical features of the embodiments of the present invention can be combined correspondingly without mutual conflict.
As shown in fig. 1 and 2, the membrane siphon effluent MBR device comprises a fan 1, a device shell 11, an equipment room 12, and a membrane suction pump 5 and a backwashing pump 7 which are arranged in the equipment room 12.
The device shell adopts a long strip-shaped shell, at least one membrane module 2 and at least one main aeration device 4 are arranged in the device shell, the main aeration device adopts a perforated aeration pipe, in the embodiment, two groups of membrane modules and two groups of main aeration devices are arranged as an example, the two groups of membrane modules are respectively positioned near the corresponding side walls along the length direction of the shell, the structure of the membrane module 2 is shown in figure 2 and comprises a membrane module body 201, a water outlet 202 is arranged on the membrane module body, the water outlet is generally positioned between the middle part and the top part of the membrane module, and the horizontal height of the water outlet is lower than the lowest height. The whole membrane module is immersed below the liquid level, in the embodiment, the structure of the membrane module adopts a conventional membrane module, each membrane module is independently provided with a membrane aeration device 3, the membrane aeration device is positioned below the corresponding membrane module, the membrane aeration device adopts a perforated aeration pipe, the aperture of the aeration pipe is 1-3 mm, an air inlet 301 of the perforated aeration pipe is externally connected with a fan 1 through a pipeline, and a control valve is independently arranged on the pipeline of each membrane aeration device. Two groups of main aeration devices 4 are arranged between the two membrane components and are positioned at the bottom of the shell of the device, perforated aeration pipes or other conventional aeration pipes are adopted and externally connected with a fan 1, and a control valve is independently arranged on a pipeline of each main aeration device, which is externally connected with the fan.
In the operation process of the device, the membrane aeration devices 3 and the main aeration devices 4 on the two sides can alternately operate for aeration, so that the reciprocating flow of water flow is promoted, meanwhile, aerobic and anaerobic areas are alternately formed in the device, one side of aeration is an aerobic area, the other side of aeration is an anaerobic area, and an anoxic area is arranged in the middle of the aeration.
The water outlet 202 of each group of membrane modules 2 is connected with one end of a membrane siphon water outlet pipe, the siphon water outlet pipe is an inverted U-shaped pipeline, one end of the siphon water outlet pipe is immersed below the liquid level in the device shell 13, the siphon water outlet pipe ascends to a certain extent to form a siphon part and then descends, and the outlet is kept lower than the liquid level in the device shell 13. Pipe diameter P (mm) and flow Q (m) of membrane siphon water outlet pipe3H) positive correlation with pipe diameter P ═ Q × (1.5 to 2.5)2But not to exceed DN150 at maximum.
The height of the clear water barrel 6 is guaranteed to be lower than the liquid level in the device shell 11, and the height difference is 0.5-2.0 m. Because the height of the liquid level in the shell of the device affects siphon water outlet, the higher the liquid level is, the larger the generated pressure difference is, the height of the die carrier of the device and the height of the whole device are comprehensively prevented, and the liquid level is higher than the die carrier by more than 20cm, which is beneficial to siphon water outlet of the film.
One end of the membrane siphon water outlet pipe is divided into two branches which are respectively connected with the water outlets of the corresponding membrane components, the other end of the siphon water outlet pipe is divided into three branches, the first branch is connected with the water outlet of the clear water barrel 6, the first branch is provided with a backwashing pump 7 and a third electric valve 10, the second branch is provided with a first electric valve 8, the third branch is provided with a membrane suction pump 5 and a second electric valve 9, and the second branch and the third branch are both connected with the water inlet of the clear water barrel. The membrane suction pump, the clear water barrel, the backwashing pump and the three electric valves are all positioned in the equipment room 12.
The sewage treatment method based on the MBR device comprises the following steps:
1. the lift pump 1 lifts the sewage into the device housing 11, and the perforated aeration pipe performs aeration to sufficiently mix the activated sludge with the sewage.
2. After sewage enters the device, the perforated aeration pipe and the microporous aeration disc are alternately aerated, the dissolved oxygen content of the aerobic zone and the anaerobic zone is ensured while activated sludge and sewage are fully mixed, the sewage fully reacts, and pollutants are removed.
3. And opening the second electric valve 9, opening the membrane suction pump 5, and performing membrane water outlet, wherein the opening time of the membrane suction pump 5 is 1-5 minutes, so that the vacuum degree of a water outlet pipeline is ensured, the water filling degree in the pipeline is enabled to reach a normal operation state, and siphon water outlet can be performed.
4. The second electric valve 9 is continuously opened, the membrane suction pump 5 is closed, the first electric valve 8 is opened, and at the moment, the water flow can form natural siphon without passing through the pump, so that the sewage in the device shell is subjected to membrane siphon water outlet.
5. And after the single water outlet is finished, the second electric valve 9 and the first electric valve 8 are closed, the backwashing pump 7 and the third electric valve 10 are opened, and membrane backwashing is carried out.
6. And after backwashing is finished, the treatment is continued by circulating the steps 1-5.
In the actual operation process, the single opening time of the first electric valve 8 is 10-30 minutes, and the single opening time of the membrane suction pump 5 is 1-5 minutes. The single membrane siphon water outlet time is 10-30 minutes, the membrane siphon water outlet time is too long, so that the sludge concentration between membrane gaps is rapidly improved, the membrane surface is easily blocked by sludge, and the siphon water outlet time is too short, so that the starting frequency of a suction pump is improved, and the power consumption is relatively improved. 5 single opening time of membrane suction pump is 1 ~ 5 minutes, and this time quantum can make outlet conduit vacuum, and the sufficient degree of intraductal water reaches normal operating condition, can carry out siphon play water. The back washing time is 0-3 minutes, and the back washing flow is Q (2-4) m3And h, the back washing interval is 15-20 minutes. The backwashing time and the flow rate are too small, and the aim of backwashing cannot be achieved. The back washing time and flow are too large, the membrane pressure is too large, and the membrane is easily damaged. The air volume for scrubbing the membrane of the membrane aeration device is 50-100 m3/(h·m2) The aeration rate is too low to play a role of scrubbing, and the too high aeration rate can lead to the dissolved oxygen in the anoxic tank to rise.
The membrane modules 2 have a plurality of pairs, wherein 1 pair of membrane modules 2 are respectively placed at two ends of the device shell 11 close to the side wall, and the other membrane modules 2 are uniformly arranged between the two groups of membrane modules 2, but should form a layout with left and right sides separated. The main aeration device is positioned between the adjacent membrane components and is used for assisting aeration and sludge mixing.
The above description is only the specific embodiments of the present invention, but the technical features of the present invention are not limited thereto, and any person skilled in the relevant art can also make changes or modifications within the scope of the present invention.
Claims (7)
1. The utility model provides a membrane siphon goes out water MBR device, includes device casing and clear water bucket, its characterized in that still includes:
the membrane aeration device is arranged in each membrane component, and the main aeration device and all the membrane aeration devices are externally connected with a fan;
a water inlet of the membrane siphon water outlet pipe is connected with a water outlet of the membrane component, a water outlet of the membrane siphon water outlet pipe is connected into the clear water bucket, and the height of the clear water bucket is lower than the height of the liquid level in the device;
a first electric valve is arranged on the pipe section on the membrane siphon water outlet pipe and outside the device shell; and two sides of the first electric valve are provided with a section of branch connected with the first electric valve in parallel, and the branch is provided with a membrane suction pump and a second electric valve.
2. The membrane siphon effluent MBR device according to claim 1, further comprising a backwash pump, wherein the inlet of the backwash pump is connected with a clear water tank through a pipeline, the outlet of the backwash pump is connected into the membrane siphon effluent pipe, and a third electric valve is arranged on the inlet pipeline.
3. The membrane siphon effluent MBR device according to claim 1, wherein the membrane module comprises a membrane module body, and a water outlet is arranged on the membrane module body; the membrane aeration device is positioned at the bottom of the membrane module body.
4. The membrane siphon effluent MBR device according to claim 3, wherein the membrane aeration device is a perforated aeration pipe, and the aperture of the aeration pipe is 1-3 mm.
5. The membrane siphon effluent MBR device according to claim 1, wherein when more than two groups of membrane modules are arranged, the membrane modules are arranged in sequence along the horizontal direction; the main aeration device is arranged between the adjacent membrane components.
6. The membrane siphon effluent MBR device according to claim 1, wherein the difference between the height of the clear water tank and the height of the liquid level in the MBR is 0.5-2.0 m.
7. The membrane siphon effluent MBR device according to claim 1, wherein the pipe diameter P of the membrane siphon effluent pipe is Q x (1.5-2.5)2Q is in m3The flow rate calculated by/h, the unit of the pipe diameter is mm, and the pipe diameter does not exceed DN150 at most.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920417563.9U CN209906444U (en) | 2019-03-29 | 2019-03-29 | Membrane siphon goes out water MBR device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920417563.9U CN209906444U (en) | 2019-03-29 | 2019-03-29 | Membrane siphon goes out water MBR device |
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| CN209906444U true CN209906444U (en) | 2020-01-07 |
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| CN201920417563.9U Active CN209906444U (en) | 2019-03-29 | 2019-03-29 | Membrane siphon goes out water MBR device |
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