CN210030154U - Membrane bioreactor for treating oil refining wastewater - Google Patents
Membrane bioreactor for treating oil refining wastewater Download PDFInfo
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- CN210030154U CN210030154U CN201920151848.2U CN201920151848U CN210030154U CN 210030154 U CN210030154 U CN 210030154U CN 201920151848 U CN201920151848 U CN 201920151848U CN 210030154 U CN210030154 U CN 210030154U
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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
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The utility model relates to the technical field of oil refining wastewater treatment, in particular to a membrane bioreactor for treating oil refining wastewater, aiming at providing a membrane bioreactor which utilizes a nano composite material as a biomembrane carrier, which can improve the load capacity of microorganisms, solve the problem of membrane pollution of the Membrane Bioreactor (MBR) and improve the efficiency of treating oil refining wastewater; it includes former water tank (1), former water pump (2), reaction box (3), self priming pump (13), well water tank (14) and controller (18), and its beneficial effect lies in: the utility model discloses combine together biomembrane and MBR technology, adopt the compound hydrophilic polyurethane foam material of nanometer attapulgite clay as the biological carrier, established neotype biomembrane-membrane bioreactor (BF-MBR), compare with traditional membrane bioreactor, BF-MBR has improved the load of microorganism, and Chemical Oxygen Demand (COD) efficiency of getting rid of and NH3-N efficiency of getting rid of all improve to some extent, and the turbidity is compared and is descended to some extent to there is better oil refining waste water efficiency.
Description
Technical Field
The utility model relates to the technical field of oil refining wastewater treatment, in particular to a membrane bioreactor for treating oil refining wastewater.
Background
Petroleum is a strategic resource and plays a major role in national economic development, but a large amount of wastewater is generated in the petroleum exploitation and petroleum refining processes, particularly in the petroleum refining process, crude oil needs to be subjected to dehydration, desalination and other treatments, and a large amount of wastewater with complex components, high oil content and poor biodegradability is generated in the process. Meanwhile, according to the development strategy of national energy conservation and emission reduction and the objective requirements of petrochemical enterprises on water conservation, the petrochemical enterprises not only need to continuously reduce pollutant emission, but also need to save water resources and increase the utilization rate of circulating water, so that the petrochemical enterprises have higher requirements on wastewater recycling, and the advanced wastewater advanced treatment and recycling technology which is applied more at present mainly uses a membrane separation technology.
As a Membrane Bioreactor (MBR) is used as the combination of a membrane separation technology and a traditional activated sludge process, compared with the traditional process, the MBR has the advantages of small floor area, high pollutant removal rate, high sludge concentration, long sludge age, small sludge production amount, good water quality of produced water, reusability, strong impact resistance, more flexible control and the like, and is gradually paid attention and applied to petrochemical wastewater treatment. Generally, petroleum refining enterprises carry out quality-based and flow-dividing treatment on production wastewater from the source to form two categories of oily wastewater and saline wastewater. The oily wastewater has low salt content, and can reach the recycling standard through an advanced treatment process under the condition of not needing a desalting process. Aiming at oily wastewater, petrochemical enterprises generally adopt pretreatment, A/O biochemical treatment, biological aerated filter and filter +
The mode of activated carbon; and by adopting the MBR process, the treatment process is greatly shortened, the process flow of pretreatment plus A/O/MBR biochemical treatment is formed, and the method has obvious advantages in the aspects of floor area, treatment efficiency and the like.
However, when the MBR process is used for treating petrochemical refining wastewater, the main difficulties are controlling the membrane pollution rate and maintaining the membrane flux. Membrane fouling refers to the phenomenon of membrane flux reduction caused by interaction between the membrane separation process and sludge mixed liquor, and several possible membrane fouling modes in MBR have been derived and verified: (1) the colloidal particles block the membrane pores; (2) adsorption of solute in the solution on the surface of the membrane; (3) settling sludge floc on the surface of the membrane; (4) compacting the filter cake layer on the surface of the membrane; (5) the composition and nature of the contaminants change during long-term operation. The membrane pollution greatly hinders the popularization and application of MBR, reduces the service performance of the membrane, increases the replacement frequency of the membrane and the operation loss of the reactor, thereby seriously affecting the economy and the practicability of the MBR technology.
Disclosure of Invention
The utility model aims at providing an utilize membrane bioreactor of nanocomposite as biomembrane carrier, its load that can improve the microorganism has solved Membrane Bioreactor (MBR) membrane pollution's problem, has improved the efficiency of handling oil refining waste water.
In order to achieve the purpose of the invention, the utility model adopts the following technical scheme:
the utility model provides a handle membrane bioreactor of oil refining waste water, includes former water tank 1, former water pump 2, reaction box 3, self priming pump 13, well water tank 14, controller 18, its characterized in that: the raw water tank 1, the raw water pump 2, the reaction tank 3, the self-priming pump 13 and the middle water tank 14 are sequentially connected through a pipeline, a water outlet pipe 40 is connected to a water outlet of the middle water tank 14, a water outlet pipe 41 is connected to the water outlet pipe 40, a backflow branch is connected to the water outlet pipe 41 and comprises a backflow pump 17, a water inlet of the backflow pump 17 is connected to the water outlet pipe 41 through a pipeline, a water outlet of the backflow pump 17 is connected to the raw water tank 1 through a pipeline, the raw water pump 2 and the self-priming pump 13 are electrically connected to the controller 18, an inner cavity of the reaction tank 3 is divided into a first tank body 5 and a second tank body 6 by a partition plate 4, bottoms of the first tank body 5 and the second tank body 6 are communicated, a packing assembly 7 is arranged in the first tank body 5, the packing assembly 7 is composed of an upper grid and a lower grid and, the filler is a microbial carrier formed by a nano attapulgite clay composite hydrophilic polyurethane foam material, a membrane assembly 8 is arranged in the second tank body 6, the membrane assembly 8 is supported by a membrane support 39 at the bottom of the second tank body 6, the membrane assembly 8 comprises a membrane assembly shell, a membrane assembly water inlet and a membrane assembly water outlet are formed in the membrane assembly shell, a filter layer covers the membrane assembly water inlet, the membrane assembly water outlet is connected with a water outlet of the reaction box 3 through a pipeline, the membrane assembly 8 is formed by PVDF hollow fibers, an aeration device is arranged at the bottom of the first tank body 5 and consists of an air pump 9, an air inlet main pipe 10, an air inlet branch pipe 11 and a ceramic aeration head 12, and a disinfection device and a water quality monitoring device 19 are arranged in the middle water tank 14.
The raw water tank 1, the reaction tank 3 and the middle water tank 14 are integrated.
An eighth ball valve 36 is arranged on a water outlet pipe 40 of the middle water tank 14, a ninth ball valve 37 is arranged on a water outlet pipe 41, and the water quality monitoring device 19, the eighth ball valve 36, the ninth ball valve 37 and the controller 18 are electrically connected.
The disinfection device consists of a chlorine tablet feeding pipe 15 and chlorine tablets fed in the chlorine tablet feeding pipe 15, and water inlet holes 16 are uniformly formed in the chlorine tablet feeding pipe 15.
The lower part of the inner wall of the raw water tank 1 is provided with a liquid level sensor 20, and the liquid level sensor 20 is electrically connected with the controller 18.
Overflow pipes are respectively arranged at the upper parts of the raw water tank 1, the reaction tank 3 and the middle water tank 14.
And the lower parts of the raw water tank 1, the reaction tank 3 and the middle water tank 14 are respectively provided with an emptying pipe, the emptying pipes are provided with corresponding ball valves, and the ball valves are electrically connected with the controller 18.
A thermometer and a PH detector are arranged in the reaction box 3 and are electrically connected with the controller 18.
The beneficial effects of the utility model reside in that: the utility model discloses combine together biomembrane and MBR technology, adopt the compound hydrophilic polyurethane foam material of nanometer attapulgite clay as the biological carrier, established neotype biomembrane-membrane bioreactor (BF-MBR), compare with traditional Membrane Bioreactor (MBR), BF-MBR has improved the load of microorganism, Chemical Oxygen Demand (COD) efficiency of getting rid of and NH3-N efficiency of getting rid of all improve to some extent, turbidity is compared and is descended to some extent to there is better oil refining waste water treatment efficiency.
Drawings
FIG. 1 is a process flow diagram of the present invention;
fig. 2 is an integral structure schematic diagram of the central water tank, the reaction tank and the central water tank of the present invention.
Shown in the figure: the device comprises a raw water tank 1, a raw water pump 2, a reaction tank 3, a partition plate 4, a first tank body 5, a second tank body 6, a packing component 7, a membrane component 8, an air pump 9, an air inlet manifold 10, an air inlet branch pipe 11, a ceramic aeration head 12, a self-priming pump 13, a middle water tank 14, a chlorine sheet feeding pipe 15, an air inlet hole 16, a reflux pump 17, a controller 18, a water quality monitoring device 19, a liquid level sensor 20, a first vent pipe 21, a first ball valve 22, a first overflow pipe 23, a second ball valve 24, a third ball valve 25, a first check valve 26, a second vent pipe 27, a fourth ball valve 28, a second overflow pipe 29, a fifth ball valve 30, a sixth ball valve 31, a second check valve 32, a third vent pipe 33, a seventh ball valve 34, a third overflow pipe 35, an eighth ball valve 36, a ninth ball valve 37, a tenth ball valve 38, a membrane support 39, a water outlet pipe 40 and a water.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
The components, structures, mechanisms and the like described in the following examples are all conventional commercially available products unless otherwise specified.
Example 1:
the utility model provides a handle membrane bioreactor of oil refining waste water, includes former water tank 1, former water pump 2, reaction box 3, self priming pump 13, well water tank 14, controller 18, its characterized in that: the raw water tank 1, the raw water pump 2, the reaction tank 3, the self-priming pump 13 and the middle water tank 14 are sequentially connected through a pipeline, a water outlet pipe 40 is connected to a water outlet of the middle water tank 14, a water outlet pipe 41 is connected to the water outlet pipe 40, a backflow branch is connected to the water outlet pipe 41 and comprises a backflow pump 17, a water inlet of the backflow pump 17 is connected to the water outlet pipe 41 through a pipeline, a water outlet of the backflow pump 17 is connected to the raw water tank 1 through a pipeline, the raw water pump 2 and the self-priming pump 13 are electrically connected to the controller 18, an inner cavity of the reaction tank 3 is divided into a first tank body 5 and a second tank body 6 by a partition plate 4, bottoms of the first tank body 5 and the second tank body 6 are communicated, a packing assembly 7 is arranged in the first tank body 5, the packing assembly 7 is composed of an upper grid and a lower grid and, the filler is a microbial carrier formed by a nano attapulgite clay composite hydrophilic polyurethane foam material, a membrane assembly 8 is arranged in the second tank body 6, the membrane assembly 8 is supported by a membrane support 39 at the bottom of the second tank body 6, the membrane assembly 8 comprises a membrane assembly shell, a membrane assembly water inlet and a membrane assembly water outlet are formed in the membrane assembly shell, a filter layer covers the membrane assembly water inlet, the membrane assembly water outlet is connected with a water outlet of the reaction box 3 through a pipeline, the membrane assembly 8 is formed by PVDF hollow fibers, an aeration device is arranged at the bottom of the first tank body 5 and consists of an air pump 9, an air inlet main pipe 10, an air inlet branch pipe 11 and a ceramic aeration head 12, and a disinfection device and a water quality monitoring device 19 are arranged in the middle water tank 14.
The raw water tank 1, the reaction tank 3 and the middle water tank 14 are integrated MBR reaction tank.
The water outlet of the raw water tank 1 is connected with the water inlet of the raw water pump 2 through a pipeline, the water outlet of the raw water pump 2 is connected with the water inlet of the reaction tank 3 through a pipeline, the water outlet of the reaction tank 3 is connected with the water inlet of the self-priming pump 13 through a pipeline, the water outlet of the self-priming pump 13 is connected with the water inlet of the reclaimed water tank 14 through a pipeline, the pipelines around the raw water pump 2 are provided with a second ball valve 24 and a third ball valve 25, the pipelines around the self-priming pump 13 are provided with a fifth ball valve 30 and a sixth ball valve 31, the pipeline between the raw water pump 2 and the reaction tank 3 is provided with a first check valve 26, the pipeline between the self-priming pump 13 and the reclaimed water tank 14 is provided with a second check valve 32, the water outlet pipe 40 of the reclaimed water tank 14 is provided with an eighth ball valve 36, the water outlet pipe 41 is provided with a ninth ball valve 37, the pipeline between the reclaimed water tank, the second ball valve 24, the third ball valve 25, the fifth ball valve 30, the sixth ball valve 31, the eighth ball valve 36, the ninth ball valve 37 and the tenth ball valve 38 are electrically connected with the controller 18.
The water quality monitoring device 19 is electrically connected with the controller 18.
The disinfection device consists of a chlorine tablet feeding pipe 15 and chlorine tablets fed in the chlorine tablet feeding pipe 15, and water inlet holes 16 are uniformly formed in the chlorine tablet feeding pipe 15. The treated reclaimed water is contacted with the chlorine tablets in the chlorine tablet feeding pipe 15 through the water inlet hole 16 so as to disinfect the reclaimed water.
The lower part of the inner wall of the raw water tank 1 is provided with a liquid level sensor 20, and the liquid level sensor 20 is electrically connected with the controller 18. When the liquid level of the raw water tank 1 measured by the liquid level sensor 20 is lower than a contrast value set in the controller 18, the controller 18 controls the power failure and the stop of the raw water pump 2 and the self-priming pump 13, so that the low liquid level protection of the raw water tank 1 is performed.
A first overflow pipe 23 is arranged at the upper part of the raw water tank 1, a second overflow pipe 29 is arranged at the upper part of the reaction tank 3, and a third overflow pipe 35 is arranged at the upper part of the medium water tank 14. Water can be drained through the overflow pipe when the liquid level in the raw water tank 1, the reaction tank 3 and the medium water tank 14 rises due to a malfunction or other reasons.
The device is characterized in that a first emptying pipe 21 is arranged at the lower part of a box body of the raw water box 1, a first ball valve 22 is arranged on the first emptying pipe 21, a second emptying pipe 27 is arranged at the lower part of the box body of the reaction box 3, a fourth ball valve 28 is arranged on the second emptying pipe 27, a third emptying pipe 33 is arranged at the lower part of the box body of the intermediate water box 14, a seventh ball valve 34 is arranged on the third emptying pipe 33, and the first ball valve 22, the fourth ball valve 28 and the seventh ball valve 34 are electrically connected with the controller 18.
Be equipped with thermometer and PH detector (not drawn in the figure) in the reaction box 3, thermometer and PH detector and controller 18 are through electric connection, and thermometer and PH detector are used for detecting temperature and pH value in the waste water treatment in-process reaction box 3, because the survival of microbial community needs suitable temperature and pH, when detecting temperature value and pH value and not being optimum, controller 18 can remind the staff to adjust temperature and pH value to the most suitable.
The membrane area of the hydrophobic polyvinylidene fluoride (PVDF) hollow fiber is 1m2Per sheet, maximum membrane flux 22L/m2·h。
The biomembrane-membrane bioreactor (BF-MBR) of the utility model adopts the mode of continuous backflow feeding to treat wastewater, the working volume is 25L, and the hydraulic retention time is 5 hours. I.e. the volume of the reaction chamber 14 is 25L. The hydraulic retention time refers to the average retention time of the sewage to be treated in the reactor, namely the average reaction time of the sewage and the microorganisms in the bioreactor. The hydraulic retention time of 5 hours means that the water is treated in the reactor for 5 hours.
The biological membrane-membrane bioreactor (BF-MBR) in the utility model stops for 2 minutes every 13 minutes of operation of the self-priming pump under the automatic mode.
The biological membrane-membrane bioreactor (BF-MBR) in the utility model uses 300mg/LNaClO to carry out routine weekly flushing in the operation process so as to lead the biological membrane-membrane bioreactor to stably operate. Before the flushing, the first ball valve 22, the fourth ball valve 28 and the seventh ball valve 34 are opened under the control of the controller 18, the liquids in the raw water tank 1, the reaction tank 3 and the medium water tank 14 are emptied by the first vent pipe 21, the second vent pipe 27 and the third vent pipe 33, then the flushing is performed by the 300mg/L NaClO, and after the flushing is completed, the flushing liquid in the corresponding tank is also emptied by the corresponding vent pipe.
The utility model discloses a working process does: before the sewage is treated, the second ball valve 24, the third ball valve 25, the fifth ball valve 30, the sixth ball valve 31 and the eighth ball valve 36 are opened through the controller 18, then the pretreated oil refining wastewater, namely the oil refining wastewater with large particles removed through precipitation is poured into the raw water tank 1 from the tank opening of the raw water tank 1, the wastewater in the raw water tank 1 is sucked into the reaction tank 3 through the action of the raw water pump 2, in the reaction tank 3, an activated sludge microbial population which is specially used for treating the oil refining wastewater and is domesticated and fixed on a microbial carrier formed by nano attapulgite clay composite hydrophilic polyurethane foam materials is attached and grown to form a functional microbial membrane, the functional microbial membrane acts on the oil refining wastewater, the wastewater is forced to pass through the functional microbial membrane through the pressurized aeration of the air pump 9, and when the oil refining wastewater carries pollutants and oxygen to flow through the functional microbial membrane, the dissolved oxygen in the wastewater is consumed, organic pollutants are absorbed and degraded by microorganisms on the functional microbial film, so that the wastewater is purified; the microorganism continuously grows and breeds, the functional microbial film is continuously thickened, when the functional microbial film is thickened to a certain degree, an anoxic or anaerobic layer is formed in the biological film, and conditions are provided for biological nitrogen and phosphorus removal; meanwhile, the biomembrane is continuously dropped and updated by the shearing force of water due to the action of pressurizing and aerating of the air pump; the treated wastewater is filtered by a hydrophobic polyvinylidene fluoride hollow fiber membrane of the membrane component 8, the filtered wastewater enters the reclaimed water tank 14 under the action of the self-priming pump 13, the chlorine sheet sterilizer sterilizes the wastewater, the sterilized wastewater is monitored by the water quality monitoring device 19, when the discharge standard is met through monitoring, the controller 18 controls to open the ninth ball valve 37, the treated reclaimed water is discharged and recycled from the water discharge pipe 41, when the discharge standard is not met through monitoring, the controller 18 controls to open the tenth ball valve 38, so that the wastewater returns to the original water tank 1 under the action of the reflux pump 17, and the wastewater is mixed and then subjected to circulating treatment.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but 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, and thus, should not be construed as limiting the present invention. Moreover, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.
Claims (8)
1. The utility model provides a handle membrane bioreactor of oil refining waste water, includes former water tank (1), former water pump (2), reaction box (3), self priming pump (13), well water tank (14) and controller (18), its characterized in that: the device comprises a raw water tank (1), a raw water pump (2), a reaction tank (3), a self-priming pump (13) and a reclaimed water tank (14) which are sequentially connected through pipelines, wherein a water outlet of the reclaimed water tank (14) is connected with a water outlet pipe (40), the water outlet pipe (40) is connected with a water outlet pipe (41), the water outlet pipe (41) is connected with a backflow branch, the backflow branch comprises a backflow pump (17), a water inlet of the backflow pump (17) is connected with the water outlet pipe (41) through a pipeline, a water outlet of the backflow pump (17) is connected with the raw water tank (1) through a pipeline, the raw water pump (2) and the self-priming pump (13) are electrically connected with a controller (18), an inner cavity of the reaction tank (3) is divided into a first tank body (5) and a second tank body (6) through a partition plate (4), and bottoms of the first tank body (5) and the, the aeration device is characterized in that a filler component (7) is arranged in the first tank body (5), the filler component (7) is composed of an upper grid, a lower grid and a filler, the filler is fixed between the upper grid and the lower grid, the filler is a microbial carrier composed of a nano attapulgite clay composite hydrophilic polyurethane foam material, a membrane component (8) is arranged in the second tank body (6), the membrane component (8) is supported by a membrane support (39) at the bottom of the second tank body (6), the membrane component (8) comprises a membrane component shell, a membrane component water inlet and a membrane component water outlet are arranged on the membrane component shell, a filter layer covers the membrane component water inlet, the membrane component water outlet is connected with a water outlet of the reaction box (3) through a pipeline, the membrane component (8) is composed of PVDF hollow fibers, an aeration device is arranged at the bottom of the first tank body (5), and the, The air inlet manifold (10), the air inlet branch pipe (11) and the ceramic aeration head (12), wherein a disinfection device and a water quality monitoring device (19) are arranged in the middle water tank (14).
2. The membrane bioreactor for treating refinery wastewater according to claim 1, wherein: the raw water tank (1), the reaction tank (3) and the medium water tank (14) are integrated.
3. The membrane bioreactor for treating refinery wastewater according to claim 1, wherein: an eighth ball valve (36) is arranged on a water outlet pipe (40) of the middle water tank (14), a ninth ball valve (37) is arranged on a water outlet pipe (41), and the water quality monitoring device (19), the eighth ball valve (36), the ninth ball valve (37) and the controller (18) are electrically connected.
4. The membrane bioreactor for treating refinery wastewater according to claim 1, wherein: the disinfection device consists of a chlorine tablet feeding pipe (15) and chlorine tablets fed in the chlorine tablet feeding pipe (15), and water inlet holes (16) are uniformly formed in the chlorine tablet feeding pipe (15).
5. The membrane bioreactor for treating refinery wastewater according to claim 1, wherein: the lower part of the inner wall of the raw water tank (1) is provided with a liquid level sensor (20), and the liquid level sensor (20) is electrically connected with the controller (18).
6. The membrane bioreactor for treating refinery wastewater according to claim 1, wherein: overflow pipes are respectively arranged at the upper parts of the raw water tank (1), the reaction tank (3) and the middle water tank (14).
7. The membrane bioreactor for treating refinery wastewater according to claim 1, wherein: and emptying pipes are respectively arranged at the lower parts of the raw water tank (1), the reaction tank (3) and the medium water tank (14), corresponding ball valves are arranged on the emptying pipes, and the ball valves are electrically connected with the controller (18).
8. The membrane bioreactor for treating refinery wastewater according to claim 1, wherein: a thermometer and a PH detector are arranged in the reaction box (3) and are electrically connected with the controller (18).
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| CN201920151848.2U CN210030154U (en) | 2019-01-29 | 2019-01-29 | Membrane bioreactor for treating oil refining wastewater |
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| CN201920151848.2U CN210030154U (en) | 2019-01-29 | 2019-01-29 | Membrane bioreactor for treating oil refining wastewater |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109867350A (en) * | 2019-01-29 | 2019-06-11 | 兰州大学 | A kind of membrane bioreactor of Refinery Wastewater |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109867350A (en) * | 2019-01-29 | 2019-06-11 | 兰州大学 | A kind of membrane bioreactor of Refinery Wastewater |
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