CN218262135U - Pollution control device of tubular membrane bioreactor - Google Patents

Abstract

The utility model discloses a tubular membrane bioreactor pollution control device adopts the analysis of instrument and meter real time monitoring, confirms membrane system running state, judges whether need wash according to operating pressure, operation flux isoparametric, realizes dynamic cleaning, and the effective operating duration of maximize also passes through real time parameter analysis simultaneously, confirms the cleaning performance of membrane, realizes the intelligent control that tubular membrane pollutes. Adopt membrane product water to wash + physics and clean as tubular membrane pollution control mode, after retrieval and utilization membrane product water washed system's pipeline and membrane intraductal residual sewage and easily got rid of impurity, produced water by the membrane and drive physics and clean the medium and carry out the circulation by scouring in the membrane pipe, get rid of the pollutant that is difficult to get rid of in membrane pipe surface and the space through direct contact, the friction with membrane intraduct, effectively prolong membrane chemical cleaning cycle and membrane life. The water used for cleaning the membrane tube is membrane produced water, so that the self-sufficiency of the whole system is realized, and meanwhile, the process energy consumption is effectively reduced by only one cleaning water pump.

Description

Pollution control device of tubular membrane bioreactor

Technical Field

The utility model relates to the field of pollution control, in particular to a pollution control device of a tubular membrane bioreactor.

Background

Terms and nouns interpretation: a membrane bioreactor: the sludge-water mixed liquid in the biochemical pool is directly pumped into the membrane tube by a pump, solid-liquid separation is carried out under the driving of pressure, clear water penetrating through the membrane enters a water production tank or is directly discharged, and concentrated liquid returns to the biochemical pool again to continuously participate in the biochemical reaction. A tubular membrane: the membrane tube is formed by tape casting of a support body such as glass fiber synthetic paper, non-woven fabric, plastic, ceramic or stainless steel and the like, and is used for removing impurities in water to achieve the aim of purifying water. Membrane fouling: membrane fouling generally refers to a process in which substances in a mixed solution are adsorbed and accumulated on the surface (outside) and in (inside) membrane pores, so that the membrane pores are blocked, the porosity is reduced, and the flux of the membrane is attenuated and the filtration pressure is increased. Controlling membrane pollution: physical and chemical measures are adopted during the operation of the membrane or in the operation clearance, so that pollutants influencing the normal operation of the membrane are reduced or eliminated, and the membrane is recovered or kept in a normal operation state as much as possible. Physical scrubbing: the physical scrubbing is to remove dirt attached to the membrane surface and in the gaps of membrane pores by directly acting on the membrane surface by using a physical medium.

The biological treatment method is a waste water treatment method which utilizes microorganisms in the natural environment to oxidize and decompose organic matters and certain inorganic poisons (such as cyanides and sulfides) in waste water and convert the organic matters and certain inorganic poisons into stable and harmless inorganic matters. The method has the advantages of low investment, good effect, low operating cost and the like, and is most widely applied to the treatment of urban wastewater and industrial wastewater.

Also, membrane separation technology is receiving increasing attention from the water treatment industry as a separation technology that is easy to handle and has high efficiency. The Membrane Bioreactor (MBR) effectively combines the biological treatment technology with the membrane separation technology, and becomes one of the most promising water treatment technologies in the 21 st century. The membrane bioreactor has the specific advantages that the membrane separation technology effectively intercepts the activated sludge in the reactor, so that microorganisms with long generation cycle can be reserved, the stable high-quality effluent quality is ensured, two parameters of Hydraulic Retention Time (HRT) and Sludge Retention Time (SRT) of the membrane bioreactor are independently controlled, and the small occupied area reduces the civil engineering cost of a sewage treatment plant, so that the membrane bioreactor is more and more commonly applied to sewage treatment plants for treating various kinds of sewage. In recent years, a great deal of research has also been conducted by many scholars into the good integration of various forms of anaerobic/aerobic biological treatment technologies with membrane technologies.

The membrane for water treatment structurally has 4 kinds of flat membrane, tubular membrane, spiral-wound membrane and hollow fiber membrane, wherein spiral-wound membrane, hollow fiber membrane require to intake water quality of water higher, are not suitable for the feed liquid of high solid content, high concentration to be handled, and the utility model discloses the tubular membrane that adopts requires lowly to the preliminary treatment of intaking because of its open channel design, mechanical strength advantage such as big, is particularly suitable for handling the liquid that contains great granule and suspended solid, if contain the biological treatment of more mud and impurity and go out water.

Although the pollution resistance of the tubular membrane is strong, for complex feed liquid such as landfill leachate, industrial wastewater and the like, flux reduction can be caused by blockage after long-time operation, and the membrane component can be irreversibly damaged seriously, so that the membrane is scrapped. Therefore, efficient and intelligent membrane cleaning is vital to solving the problem of membrane pipe fouling and blocking and improving the operation efficiency of a membrane system, the membrane treatment systems which operate at home and abroad are provided with a clean water flushing process at present, the specific process is that the membrane treatment systems are switched to an automatic flushing mode after operating for a set time, and a flushing pump delivers clean water to flush the membrane pipes and then is switched to a normal operation mode. However, inorganic scale and organic pollutants which cannot be easily removed can still be accumulated on the surface of the membrane tube after the membrane tube runs for a long time, the membrane tube needs to be chemically cleaned by acid-base agents after shutdown, frequent chemical cleaning can cause irreversible influence on the service life of the membrane, and the shutdown cleaning reduces the effective running time of the membrane, so that the problem of pollution and blockage cannot be well solved only by regularly washing with clear water.

The prior tubular membrane bioreactor for advanced sewage treatment mainly has the following problems.

(1) Aiming at the tubular membrane, the prior art mostly adopts a clean water washing mode to control membrane pollution. The membrane system has high solid content and complex components in sewage treatment, causes serious pollution to membrane materials and great removal difficulty, has small effect of pure clear water washing, cannot achieve the aim of timely reducing pollution, has larger water consumption in the washing process, and increases the power consumption of equipment, thereby increasing the whole operation cost.

(2) The backwashing process is also widely applied to tubular membrane pollution control in recent years, pollutants adsorbed above and in membrane holes are cleaned through reverse water flow, and effective control can be formed on membrane pollution. However, the backwashing process has high requirement on the anti-extrusion performance of the membrane tube, the common membrane tube cannot meet the backwashing requirement, the common membrane tube cannot be applied to all tubular membranes, and the backwashing pressure rises obviously along with the increase of the pollution degree, so that the flushing effect is reduced and the operation cost is increased.

(3) The existing tubular membrane washing steps are all preset: after the operation is carried out for hours, the membrane cleaning is started for several minutes to more than ten minutes, the operation is restarted after the cleaning is finished, the operation time is 2-4 weeks, and the machine is stopped to carry out chemical cleaning on the membrane system. The effective operation time of the membrane system is not utilized to the maximum, the cleaning effect gradually becomes worse along with the increase of the operation time of the membrane, and the membrane treatment efficiency is in the trend of obviously sliding down in a chemical cleaning period. And multiple chemical cleanings can also reduce the service life of the membrane and increase the cost caused by membrane replacement.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is not enough to above-mentioned prior art, and the utility model provides a tubular membrane bioreactor pollution control device, through the real time monitoring to operating parameter, confirm the membrane and wash the opportunity to adopt the membrane to produce the method that water washed + physics and cleaned, improve the cleaning performance, alleviate membrane pipe pollution degree, reach increase of service life's purpose.

In order to solve the technical problem, the utility model discloses a technical scheme is:

a pollution control device of a tubular membrane bioreactor comprises a biochemical pool, a tubular membrane, a produced water backflow tank, a first electric valve, a second electric valve, a third electric valve, a first three-way electric valve, a second three-way electric valve, a water inlet pressure pump, a cleaning water pump, a first pipeline, a second pipeline, a third pipeline and a fourth pipeline; the discharge port of the biochemical tank is connected with the feed inlet of the tubular membrane through a first pipeline, the discharge port of the tubular membrane comprises a concentrated water outlet and a produced water outlet, the concentrated water outlet of the tubular membrane is connected with the feed inlet of the biochemical tank through a second pipeline, the produced water outlet of the tubular membrane is connected with the water inlet of the produced water reflux tank through a third pipeline, and the water outlet of the produced water reflux tank is connected to the first pipeline between the biochemical tank and the tubular membrane through a fourth pipeline; the first electric valve and the water inlet pressurizing pump are arranged on the first pipeline; the second electric valve and the second three-way electric valve are arranged on the second pipeline; the first three-way electric valve is arranged on the third pipeline; the third electric valve and the cleaning water pump are arranged on the fourth pipeline.

As further optimization of the utility model, the system also comprises a water inlet pressure gauge, a water production pressure gauge, a water inlet flow meter and a water production flow meter; the first electric valve, the water inlet pressure pump, the water inlet flowmeter and the water inlet pressure gauge are sequentially arranged on the first pipeline; the water production pressure gauge and the water production flowmeter are sequentially arranged on a third pipeline between the water production outlet of the tubular membrane and the first three-way electric valve.

As a further preferred aspect of the present invention, the device further comprises a scrubbing medium storage tank, a scrubbing medium, a fifth pipeline and a fourth electric valve; the scrubbing medium is arranged in the scrubbing medium storage tank and is sequentially connected with the second three-way electric valve, the scrubbing medium storage tank, the fourth electric valve and the fourth pipeline through a fifth pipeline.

As a further optimization of the utility model, the utility model also comprises a scrubbing medium baffle, a fifth electric valve and a sixth pipeline; the scrubbing medium storage tank, the scrubbing medium baffle and the fifth electric valve are sequentially connected through a sixth pipeline.

As the utility model discloses a further preferred, still include the level gauge, the level gauge sets up on producing the water reflux jar.

As a further preference of the present invention, the scrubbing medium is a flexible medium, and the scrubbing medium is cylindrical or spherical.

As a further preference of the present invention, the diameter of the scouring media is greater than the inner diameter of the tubular membrane.

As a further preferred aspect of the present invention, the scrubbing medium baffle is a hollow metal baffle, which is disposed in the sixth pipeline, and the scrubbing medium baffle is made of copper or stainless steel.

As a further preferred aspect of the present invention, the tubular membranes are plural and connected in series.

As a further preferred aspect of the present invention, the washing water flow meter is further included, and the washing water flow meter is disposed on a fourth pipeline between the washing water pump and the first pipeline

The utility model discloses following beneficial effect has:

1. the operation state of the membrane system is determined by monitoring instruments and meters in real time during the operation of the system, and key parameters (membrane flux and membrane pressure difference) are obtained by analyzing and calculating parameters such as operation pressure, operation flow and the like, so that whether cleaning is needed or not is judged, dynamic cleaning is realized, and the effective operation time is maximized.

2. The membrane pipe washing effect is improved, the washing efficiency is improved, the operation period of a membrane system is prolonged, the chemical cleaning frequency is reduced, and a series of problems caused by membrane pollution, such as short membrane service life, high membrane replacement cost, reduced effluent quality, high subsequent process operation pressure and the like, are solved by combining membrane produced water recycling washing and physical scrubbing.

3. General membrane cleaning process water consumption is great, under the normal condition of membrane operational aspect, can satisfy the sparge water requirement through the filterable product water quality of water of membrane, the utility model discloses make full use of tubular membrane product water need not additionally to use the running water to wash, energy saving and emission reduction.

4. Through the automatic control of a cleaning water pump and an electric valve, the whole process of membrane water production recycling flushing and physical scrubbing is realized, and compared with the conventional process of realizing forward backwashing through a plurality of pumps, the process has better effect and can reduce investment cost and operation energy consumption.

5. The utility model provides a full automatic operation that a whole set of operating system has realized membrane filtration, membrane washing basically and has cleaned, the operation of being convenient for, the operation is simple.

6. The utility model discloses a flexible cleaning medium, under the prerequisite of abundant clean membrane pipe, can not cause the damage to the membrane, and be convenient for change.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic diagram of the membrane fouling control logic of the present invention.

Among them are: 1. a biochemical pool; 2. a tubular membrane; 3. producing water and refluxing the tank; 4. a scrub medium storage tank; 5. scrubbing the media barrier; 6. a first electrically operated valve; 7. a second electrically operated valve; 8. a third electrically operated valve; 9. a fourth electrically operated valve; 10. a fifth electrically operated valve; 11. a first three-way electric valve; 12. a second three-way electric valve; 13. a first conduit; 14. a second conduit; 15. a third pipeline; 16. a fourth conduit; 17. a fifth pipeline; 18. a sixth pipeline; 19. a water inlet pressure pump 20, a water inlet flow meter; 21. a water inlet pressure gauge; 22. a water production pressure gauge; 23. a produced water flow meter; 24. a liquid level meter; 25. cleaning the water pump; 26. the water flow meter is cleaned.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific preferred embodiments.

In the description of the present invention, it should be understood that the terms "left side", "right side", "upper part", "lower part" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, "first", "second" and the like do not indicate the degree of importance of the component parts, and thus, are not to be construed as limiting the present invention. The specific dimensions used in the present embodiment are only for illustrating the technical solution, and do not limit the protection scope of the present invention.

As shown in fig. 1-2, the utility model discloses a pollution control device of a tubular membrane bioreactor, which comprises a biochemical pool 1, a tubular membrane 2, a produced water reflux tank 3, a first electric valve 6, a second electric valve 7, a third electric valve 8, a first three-way electric valve 11, a second three-way electric valve 12, a water inlet pressure pump 19, a cleaning water pump 25, a first pipeline 13, a second pipeline 14, a third pipeline 15 and a fourth pipeline 16; the discharge port of the biochemical pool 1 is connected with the feed inlet of the tubular membrane 2 through a first pipeline 13, the discharge port of the tubular membrane 2 comprises a concentrated water outlet and a produced water outlet, the concentrated water outlet of the tubular membrane 2 is connected with the feed inlet of the biochemical pool 1 through a second pipeline 14, the produced water outlet of the tubular membrane 2 is connected with the water inlet of the produced water reflux tank 3 through a third pipeline 15, and the water outlet of the produced water reflux tank 3 is connected with the first pipeline 13 between the biochemical pool 1 and the tubular membrane 2 through a fourth pipeline 16; the first electric valve 6 and the water inlet pressurizing pump 19 are arranged on the first pipeline 13; the second electric valve 7 and the second three-way electric valve 12 are arranged on the second pipeline 14; the first three-way electric valve 11 is arranged on the third pipeline 15; the third electric valve 8 and the wash water pump 25 are arranged on the fourth pipe 16. The wash water flow meter 26 is disposed on the fourth pipe 16 between the wash water pump 25 and the first pipe 13.

The utility model also comprises a water inlet pressure gauge 21, a water production pressure gauge 22, a water inlet flow meter 20 and a water production flow meter 23; the first electric valve 6, the water inlet pressurizing pump 19, the water inlet flowmeter 20 and the water inlet pressure gauge 21 are sequentially arranged on the first pipeline 13; the water production pressure gauge 22 and the water production flow meter 23 are sequentially arranged on the third pipeline 15 between the water production outlet of the tubular membrane 2 and the first three-way electric valve 11. The device also comprises a scrubbing medium storage tank 4, a scrubbing medium, a fifth pipeline 17 and a fourth electric valve 9; the scrubbing medium is arranged in the scrubbing medium storage tank 4 and is sequentially connected with the second three-way electric valve 12, the scrubbing medium storage tank 4, the fourth electric valve 9 and the fourth pipeline 16 through a fifth pipeline 17. Also included are a scrub media barrier 5, a fifth motorized valve 10 and a sixth conduit 18; the scrubbing media storage tank 4, the scrubbing media baffle 5 and the fifth electrically operated valve 10 are connected in sequence by a sixth pipe 18.

The 0-1 channel of the first three-way electric valve 11 is a channel from the produced water outlet of the tubular membrane 2 to the direction of the subsequent advanced treatment workshop, and the 0-2 channel of the first three-way electric valve 11 is a channel from the produced water outlet of the tubular membrane 2 to the direction of the produced water reflux tank 3. The 0-1 channel of the second three-way electric valve 12 is a channel from the concentrated water outlet of the tubular membrane 2 to the direction of the biochemical pool 1, and the 0-2 channel of the second three-way electric valve 12 is a channel from the concentrated water outlet of the tubular membrane 2 to the direction of the scrubbing medium storage tank 4.

As shown in fig. 1, the first pipe 13 is connected to the biochemical pool 1, the first electric valve 6, the water inlet pressure pump 19, the water inlet flow meter 20, the water inlet pressure gauge 21 and the inlet of the tubular membrane 2 in sequence. The second pipeline 14 is connected with the concentrated water outlet of the tubular membrane 2, the channel 0-1 of the second three-way electric valve 12 and the biochemical pool 1 in sequence. The third pipeline 15 is connected with the water outlet of the tubular membrane 2, the water pressure gauge 22, the water flow meter 23, the 0-2 channel of the first three-way electric valve 11 and the water return tank 3 in sequence. The fourth pipeline 16 is sequentially connected with a water outlet of the produced water backflow tank 3, the third electric valve 8, the cleaning water pump 25, the cleaning water flowmeter 26 and the first pipeline 13; and the fourth pipe 16 is connected to the first pipe 13 between the intake flow meter 20 and the intake pressure gauge 21. The fifth pipeline 17 is connected with the channel 0-2 of the second three-way electric valve 12, the scrubbing medium storage tank 4, the fourth electric valve 9 and the fourth pipeline 16 in sequence, and the fifth pipeline 17 is connected on the fourth pipeline 16 between the third electric valve 8 and the cleaning water pump 25. The sixth pipeline 18 is connected with the scrubbing medium storage tank 4, the scrubbing medium baffle 5, the fifth electric valve 10 and the pretreatment units such as the biochemical tank 1 or the process pre-settling tank in sequence.

As shown in figures 1 and 2, the utility model mainly comprises a membrane filtration process, a clear water washing process and a scrubbing process.

When the biochemical pool runs normally, the first electric valve 6 and the second electric valve 7 are opened, the 0-1 channel of the second three-way electric valve 12 is communicated, the outlet water of the biochemical pool 1 enters the tubular membranes 2 under the pressurization effect of the water inlet pressurization pump 19, the number of the tubular membranes 2 is not fixed, and the tubular membranes 2 are overlapped in a series connection mode. The produced water which is fully removed with impurities such as ammonia nitrogen, suspended matters and the like is discharged through the produced water outlet of each membrane tube under the action of membrane filtration and separation. And a liquid level meter 24 is arranged on the produced water reflux tank 3, if the liquid level meter 24 shows that the liquid level of the produced water reflux tank 3 does not reach the set high liquid level, a channel 0-2 of the first three-way electric valve 11 is communicated, produced water flows into the produced water reflux tank 3 from a produced water outlet of the tubular membrane 2 until the set high liquid level is reached, a channel 0-1 of the first three-way electric valve 11 is communicated, and membrane produced water enters a subsequent deep treatment workshop. And the concentrated water for intercepting the pollutants is produced from a concentrated water outlet and sequentially passes through the 0-1 channel of the second electric valve 7 and the second three-way electric valve 12, and then flows back to the biochemical pool 1 again, so that no waste water and waste residue are discharged outside, the function of preventing the biochemical pool 1 from running mud is achieved, and the positive effect is achieved for the stable operation of a biochemical system.

The utility model discloses a to the real-time detection, the analysis of operation in-process pressure, flow, confirm the membrane operational aspect, judge membrane pollution degree to produce certain pollution through judging the membrane pipe and need rinse in time, then the stall begins to wash the preface. The membrane pollution control logic of the system is shown in figure 2.

As shown in fig. 2, in the data detection step, the water inlet pressure gauge 21 and the water production end pressure gauge detect the pressure of the running water inlet and outlet in real time, and the water inlet flowmeter 20 and the water production end flowmeter detect the flow of the running water inlet and outlet in real time. And the data is immediately uploaded to a data analysis module for real-time analysis and conversion after being acquired by the data acquisition module. The utility model discloses regard as the decisive parameter who judges membrane running state with membrane pressure differential and membrane flux, pollute the aggravation in the membrane, the membrane pressure of crossing of pending waste water can increase obviously, and membrane flux, the processing water yield of unit membrane area in unit interval can descend gradually promptly, leads to the membrane treatment effeciency to reduce. By calculating on the fly, the calculation mode is as follows:

membrane pressure difference (kPa) = reading of water inlet pressure gauge-reading of water production section pressure gauge

Membrane flux (LMH, i.e. L/m2 · h) = produced water end flow meter reading/active membrane area

When the membrane pressure difference data is higher than a membrane pressure difference threshold value set by the system or the membrane flux is lower than a limit value set by the system, the membrane pollution judging module immediately judges that the tubular membrane 2 has serious membrane pollution which affects normal operation, and the system stops normal operation and executes a cleaning step sequence.

After judging that the membrane tube is to be cleaned in time, the intelligent control module executes real-time control on the pump and the valve, the cleaning step sequence is divided into two steps of membrane produced water flushing and physical scrubbing, and the operation steps are as follows:

flushing membrane produced water: firstly, closing a water inlet pressure pump 19, after the water inlet pressure pump 19 is completely stopped, sequentially closing a first electric valve 6, opening a third electric valve 8, keeping a channel 0-1 of a first three-way electric valve 11 and a channel 0-1 of a second three-way electric valve 12 to be communicated, opening a cleaning water pump 25 to carry out membrane produced water flushing, and returning waste water, which is generated at a concentrated water end after flushing water passes through a membrane and is mixed with a large amount of impurities and sludge, into a biochemical pool 1 through a channel 0-1 of the second three-way electric valve 12, so as to ensure the quality of cleaning produced water in a produced water return tank 3, and discharging water at a produced water end directly through a channel 0-1 of the first three-way electric valve 11.

Physical scrubbing: after membrane produced water is flushed, large-volume impurities in the membrane tube are removed, the normal operation of the flushing water is kept, the fourth electric valve 9 is sequentially opened, the first three-way electric valve 11 and the second three-way electric valve 12 are adjusted to be communicated through channels 0-2, a flexible scrubbing medium in the scrubbing medium storage tank 4 is pumped into the tubular membrane 2 through the flushing water pump 25, the interior of the membrane tube is physically scrubbed, pollutants which are attached to the membrane wall and difficult to clean are removed, the medium is discharged through a concentrated water end, and returns to the scrubbing medium storage tank 4 through the channels 0-2 of the second electric valve 7 and the second three-way electric valve 12, the steps are repeated again to achieve circular scrubbing, and water discharged from a water production end returns to the produced water backflow tank 3 through the channels 0-2 of the first three-way electric valve 11. After a plurality of times of circular scrubbing, the fourth electric valve 9 is closed, the fifth electric valve 10 is opened, the outlet water at the concentrated water end is discharged into a pretreatment unit such as a biochemical tank 1 or a process pre-settling tank after passing through the fifth electric valve 10, and the scrubbing medium is retained in a storage tank due to the scrubbing medium baffle 5. After all the scrubbing media return to the tank, the cleaning water pump 25, the third electric valve 8 and the fifth electric valve 10 are sequentially closed, the second electric three-way valve is adjusted to be communicated with the channel 0-1, the channel 0-2 of the first three-way electric valve 11 is kept communicated (the produced water is supplemented to return the cleaning water of the tank 3), and the first electric valve 6 is opened.

After the operation is finished, the water inlet pressurizing pump 19 is started to continue normal operation, and when the liquid level meter 24 displays that the set high liquid level is reached, the 0-1 channel of the first three-way electric valve 11 is conducted.

The membrane pollution is a continuously accumulated process, the combination of washing and physical scrubbing can greatly improve the cleaning effect of the membrane tube, reduce the chemical cleaning frequency and prolong the service life of the membrane, but the membrane can not be operated for a long time without chemical cleaning, and the chemical cleaning still is the best recovery means after the membrane tube is seriously polluted. If the membrane pressure difference data is higher than the membrane pressure difference threshold value set by the system or the membrane flux is lower than the membrane flux limit value set by the system in the first hour of the operation process, the tubular membrane 2 is seriously polluted, and the machine needs to be stopped for chemical cleaning to recover the normal state of the membrane.

Supplementary explanation as technical scheme, the utility model discloses the medium is cleaned to physics that adopts, for flexible medium, because of the characteristic of membrane, too hard material can directly scrape rupture of membranes surface through the membrane tube is inside, makes it lose the filter effect. The utility model discloses a medium material is scrubbed to flexibility, including but not limited to wood fiber, foamed plastic, polyvinyl alcohol etc. that have flexibility and surface strength concurrently. The medium can be columnar or spherical, the size of the medium is slightly larger than the inner diameter of the membrane tube, and the medium enters the membrane tube by pressure to fully scrub the inner wall of the membrane tube. After a certain service time, the medium may be damaged and hardened due to long-time pressure action and water immersion, and the scrubbing medium can be replaced.

The utility model discloses a clean medium baffle 5, for the metal baffle of fretwork, the fretwork aperture should be as big as possible under the condition that the guaranteeing to clean the medium and can't pass through, otherwise can the siltation in jar through cleaning impurity, the scale deposit that drops. The baffle is made of copper or stainless steel or common steel subjected to anticorrosion treatment (painting or galvanizing), so that the surface of the baffle is prevented from being corroded or part of metal materials are prevented from falling off after the baffle is used for a long time.

The utility model discloses an instrument and meter real time monitoring analysis determines membrane system running state, judges whether need wash according to operating pressure, operation flux isoparametric, realizes dynamic cleaning, and the maximize effective operation duration also passes through real-time parametric analysis simultaneously, confirms the cleaning performance of membrane, realizes the intelligent control that 2 membranes of tubular membrane pollute.

The utility model discloses a membrane is produced water and is washed + physics and clean as 2 pollution control modes of tubular membrane, and the retrieval and utilization membrane is produced water and is left sewage and easily get rid of impurity back in system's pipeline and the membrane pipe, is produced water by the membrane and drives physics and clean the medium and circulate in the membrane pipe and erode, get rid of the pollutant that is difficult to get rid of in membrane pipe surface and the space through with inside direct contact of membrane pipe, friction, effectively prolong membrane chemistry cleaning cycle and membrane life. Just the utility model discloses membrane pipe washs used water and is membrane product water, realizes entire system's "self-sufficiency", only through a washing water pump 25 simultaneously, realizes above-mentioned whole flows of washing + scrubbing, effectively reduces the technology energy consumption, reduces the running cost.

The above detailed description describes the preferred embodiments of the present invention, but the present invention is not limited to the details of the above embodiments, and the technical idea of the present invention can be within the scope of the present invention to perform various equivalent transformations, which all belong to the protection scope of the present invention.

Claims (10)

1. A pollution control device of a tubular membrane bioreactor is characterized in that: the device comprises a biochemical pool (1), a tubular membrane (2), a produced water backflow tank (3), a first electric valve (6), a second electric valve (7), a third electric valve (8), a first three-way electric valve (11), a second three-way electric valve (12), a water inlet pressure pump (19), a cleaning water pump (25), a first pipeline (13), a second pipeline (14), a third pipeline (15) and a fourth pipeline (16);

the discharge hole of the biochemical pond (1) is connected with the feed inlet of the tubular membrane (2) through a first pipeline (13), the discharge hole of the tubular membrane (2) comprises a concentrated water outlet and a produced water outlet, the concentrated water outlet of the tubular membrane (2) is connected with the feed inlet of the biochemical pond (1) through a second pipeline (14), the produced water outlet of the tubular membrane (2) is connected with the water inlet of the produced water reflux tank (3) through a third pipeline (15), and the water outlet of the produced water reflux tank (3) is connected to the first pipeline (13) between the biochemical pond (1) and the tubular membrane (2) through a fourth pipeline (16);

the first electric valve (6) and the water inlet pressure pump (19) are arranged on the first pipeline (13); the second electric valve (7) and the second three-way electric valve (12) are arranged on the second pipeline (14); the first three-way electric valve (11) is arranged on the third pipeline (15); the third electric valve (8) and the cleaning water pump (25) are arranged on the fourth pipeline (16).

2. The pollution control device of a tubular membrane bioreactor according to claim 1, wherein: the system also comprises a water inlet pressure gauge (21), a water production pressure gauge (22), a water inlet flow meter (20) and a water production flow meter (23); the first electric valve (6), the water inlet pressure pump (19), the water inlet flow meter (20) and the water inlet pressure gauge (21) are sequentially arranged on the first pipeline (13); the water production pressure gauge (22) and the water production flow meter (23) are sequentially arranged on the third pipeline (15) between the water production outlet of the tubular membrane (2) and the first three-way electric valve (11).

3. The pollution control device of a tubular membrane bioreactor according to claim 2, wherein: the device also comprises a scrubbing medium storage tank (4), a scrubbing medium, a fifth pipeline (17) and a fourth electric valve (9); the scrubbing medium is arranged in the scrubbing medium storage tank (4) and is sequentially connected with the second three-way electric valve (12), the scrubbing medium storage tank (4), the fourth electric valve (9) and the fourth pipeline (16) through a fifth pipeline (17).

4. The pollution control device of a tubular membrane bioreactor according to claim 3, wherein: the device also comprises a scrubbing medium baffle (5), a fifth electric valve (10) and a sixth pipeline (18); the scrubbing medium storage tank (4), the scrubbing medium baffle (5) and the fifth electric valve (10) are sequentially connected through a sixth pipeline (18).

5. The pollution control device of a tubular membrane bioreactor according to claim 1, wherein: the device also comprises a liquid level meter (24), and the liquid level meter (24) is arranged on the produced water reflux tank (3).

6. The pollution control device of a tubular membrane bioreactor according to claim 3, wherein: the scrubbing medium is flexible and is columnar or spherical.

7. The pollution control device of a tubular membrane bioreactor according to claim 6, wherein: the diameter of the scouring media is greater than the inner diameter of the tubular membrane (2).

8. The pollution control device of a tubular membrane bioreactor according to claim 4, wherein: the scrubbing medium baffle (5) is a hollow metal baffle and is arranged in the sixth pipeline (18), and the scrubbing medium baffle (5) is made of copper or stainless steel.

9. The pollution control device of a tubular membrane bioreactor according to claim 1, wherein: the tubular membranes (2) are connected in series.

10. The pollution control device of a tubular membrane bioreactor according to claim 1, wherein: the washing water flow meter (26) is further included, and the washing water flow meter (26) is arranged on the fourth pipeline (16) between the washing water pump (25) and the first pipeline (13).

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