CN113754186B - Oily wastewater treatment system - Google Patents
Oily wastewater treatment system Download PDFInfo
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- CN113754186B CN113754186B CN202111025069.6A CN202111025069A CN113754186B CN 113754186 B CN113754186 B CN 113754186B CN 202111025069 A CN202111025069 A CN 202111025069A CN 113754186 B CN113754186 B CN 113754186B
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- water separation
- anaerobic reaction
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- 238000000926 separation method Methods 0.000 claims description 136
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 136
- 238000006243 chemical reaction Methods 0.000 claims description 56
- 238000002955 isolation Methods 0.000 claims description 46
- 239000004576 sand Substances 0.000 claims description 20
- 238000004065 wastewater treatment Methods 0.000 claims description 20
- 239000002351 wastewater Substances 0.000 claims description 18
- 239000010802 sludge Substances 0.000 claims description 16
- 238000003756 stirring Methods 0.000 claims description 12
- 125000006850 spacer group Chemical group 0.000 claims description 11
- 238000007667 floating Methods 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 7
- 238000005192 partition Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- 239000003921 oil Substances 0.000 description 32
- 230000000694 effects Effects 0.000 description 9
- 239000004519 grease Substances 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000005191 phase separation Methods 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000004800 polyvinyl chloride Substances 0.000 description 3
- 238000004062 sedimentation Methods 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
-
- 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
- C02F3/28—Anaerobic digestion processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
-
- 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
- C02F2303/24—Separation of coarse particles, e.g. by using sieves or screens
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Microbiology (AREA)
- Analytical Chemistry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention discloses an oil-containing wastewater treatment system, which comprises at least one group of sand-water-oil separation areas and anaerobic reaction areas, wherein each group of sand-water-oil separation areas comprises a sand-water separation area and an oil-water separation area, and the sand-water-oil separation areas and the anaerobic reaction areas are positioned in the same tank unit; each group of sand water oil separation areas are separated from the anaerobic reaction area by a first isolation frame; the sand-water separation areas and the oil-water separation areas of the same group are separated by a second isolation frame and a first isolation frame, and the sand-water separation areas and the upper parts of the oil-water separation areas of the same group are communicated; the bottom of each oil-water separation zone is communicated with the bottom of the anaerobic reaction zone; a plurality of sloping plates are arranged in each oil-water separation zone; the middle upper part of the anaerobic reaction zone is provided with a multi-layer herringbone plate structure; and watertight partitions are paved on each first isolation frame and each second isolation frame. The invention aims at dividing different functional areas in the tank body unit so as to realize multiphase separation treatment of the introduced oily wastewater.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to an oily wastewater treatment system.
Background
At present, along with the continuous expansion of urban scale and the increase of population, water environment pollution becomes a great difficulty, while industrial wastewater is the key point and the difficult point in the current sewage treatment work, especially the wastewater in the oil-containing food industry, although the toxicity is not great, the wastewater relates to the food residence of people, the pollution discharge amount is large, the pollution discharge range is wider, and the hazard is huge; the grease in the oily wastewater seriously affects the activity of water treatment microorganisms, and suspended matters such as muddy sand in the wastewater can also cause the sedimentation of an anaerobic tank to affect the use function of the anaerobic tank.
The existing treatment technology is to divide the sand setting, oil separation and anaerobic into a plurality of units, and an intermediate water pool and a power lifting device are arranged between the units due to different heights of the units. The prior art wastes the land occupation of the plane and the energy consumption of ton water treatment. Specifically, in the oil-gas-water-sand four-phase separator in the prior art CN 112007421A, inorganic sand and associated gas in water are removed by adopting the action of rotational flow and gravity, and mineral oil is separated by an inclined plate. And the prior art CN 106277305A is an anaerobic four-phase separator, which is also a traditional anaerobic reaction annular three-phase separator, and although the separation of floating sludge is increased, the floating sludge belongs to the anaerobic lost gas-containing biological sludge, and the technology cannot realize the four-phase separation function in a strict sense.
Disclosure of Invention
The invention mainly aims to provide an oily wastewater treatment system, which aims to solve the technical problems that the existing oily wastewater is difficult to separate and is not thoroughly treated.
In order to achieve the above purpose, the invention provides an oil-containing wastewater treatment system, which comprises at least one group of sand-water-oil separation areas and anaerobic reaction areas, wherein each group of sand-water-oil separation areas comprises a sand-water separation area and an oil-water separation area, and each group of sand-water-oil separation areas and anaerobic reaction areas are positioned in the same tank unit;
each group of sand water oil separation areas are separated from the anaerobic reaction area by a first isolation frame;
the sand-water separation areas and the oil-water separation areas of the same group are separated by a second isolation frame and a first isolation frame, and the sand-water separation areas and the upper parts of the oil-water separation areas of the same group are communicated;
the bottom of each oil-water separation zone is communicated with the bottom of the anaerobic reaction zone;
a plurality of sloping plates are arranged in each oil-water separation zone, and each sloping plate is used for realizing oil-water separation in the oil-water separation zone;
the middle upper part of the anaerobic reaction zone is provided with a plurality of layers of herringbone plate structures, and each herringbone plate structure is used for separating biological sludge and biogas generated in the anaerobic reaction zone;
and watertight partitions are paved on each first isolation frame and each second isolation frame.
Optionally, a stirring structure is arranged in each sand-water separation zone, and the stirring structure is placed in the middle of each sand-water separation zone.
Optionally, each inclined plate is parallel to each other and has an included angle of 30-60 degrees with the horizontal, and each inclined plate is parallel to the upper part of the corresponding second isolation frame.
Optionally, each first isolation frame is composed of a first isolation frame unit with a preset angle and a first isolation frame auxiliary unit, and an included angle between the first isolation frame unit near the lower part of each group of sand water oil separation areas and the horizontal direction is 45-60 degrees.
Optionally, the highest level of the first spacer auxiliary unit near each oil-water separation zone is higher than the liquid level in the tank unit.
Optionally, the bottom of each oil-water separation zone is communicated with the bottom of the anaerobic reaction zone through a plurality of water distribution pipes, and a plurality of through holes are formed in the bottom of each oil-water separation zone and matched with the corresponding water distribution pipes.
Optionally, an oil-containing wastewater inlet is formed in the middle of each sand-water separation zone, a silt outlet is formed in the bottom of each sand-water separation zone, a biological mud outlet after anaerobic reaction is formed in the bottom of each anaerobic reaction zone, a floating oil outlet is formed in the upper portion of each oil-water separation zone, and a plurality of overflow tanks are formed in the upper portion of each anaerobic reaction zone.
Optionally, each herringbone plate structure is communicated with a biogas collecting pipe, and the biogas collecting pipe is connected with a biogas treatment device.
Optionally, each group of sand-water-oil separation areas is connected with the vertical tank wall of the tank body unit in a symmetrical or adjacent mode.
Optionally, each herringbone plate structure covers the middle upper part of the anaerobic reaction zone and is simultaneously contacted with or spaced from each first isolation frame and the vertical tank wall of the tank body unit by a preset distance.
The invention provides an oil-containing wastewater treatment system, which comprises at least one group of sand-water-oil separation areas and anaerobic reaction areas, wherein each group of sand-water-oil separation areas comprises a sand-water separation area and an oil-water separation area, and the sand-water-oil separation areas and the anaerobic reaction areas are positioned in the same tank unit; each group of sand water oil separation areas are separated from the anaerobic reaction area by a first isolation frame; the sand-water separation areas and the oil-water separation areas of the same group are separated by a second isolation frame and a first isolation frame, and the sand-water separation areas and the upper parts of the oil-water separation areas of the same group are communicated; the bottom of each oil-water separation zone is communicated with the bottom of the anaerobic reaction zone; a plurality of sloping plates are arranged in each oil-water separation zone, and each sloping plate is used for realizing oil-water separation in the oil-water separation zone; the middle upper part of the anaerobic reaction zone is provided with a plurality of layers of herringbone plate structures, and each herringbone plate structure is used for separating biological sludge and biogas generated in the anaerobic reaction zone; and watertight partitions are paved on each first isolation frame and each second isolation frame. According to the oily wastewater treatment system, different functional areas are divided in the tank body unit, so that the introduced oily wastewater is subjected to multiphase thorough separation, namely, the separation of muddy sand, grease, biological biogas, anaerobic sludge and reacted clear water in one reactor can be realized, an intermediate water tank and secondary lifting are not needed, the treatment efficiency of the oily wastewater is improved, and the cost expenditure for building the system is reduced.
Drawings
FIG. 1 is a schematic elevational view of a first embodiment of an oily wastewater treatment system of the present invention;
FIG. 2 is a schematic diagram of an elevation of a second embodiment of an oily wastewater treatment system according to the present invention.
Reference numerals illustrate:
| reference numerals | Name of the name | Reference numerals | Name of the name |
| 10 | Anaerobic reaction zone | 20 | Sand-water separation zone |
| 30 | Oil-water separation area | 40 | Floating oil zone |
| 50 | Overflow trough | 60 | Herringbone plate structure |
| 70 | Water distribution pipe | 80 | Second isolation frame |
| 90 | First isolation frame | 11 | Biological mud outlet |
| 21 | Stirring structure | 22 | Silt outlet |
| 23 | Second valve | 24 | Oily wastewater inlet |
| 25 | First valve | 31 | Sloping plate |
| 32 | Through hole | 33 | Floating oil outlet |
| 41 | Third valve | 51 | Connecting pipeline |
| 61 | Biogas collecting pipe | 62 | Methane liquid sealing device |
| 91 | First isolation frame unit | 92 | First isolation frame auxiliary unit |
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1, which is a schematic structural view of a vertical structure of a first embodiment of an oily wastewater treatment system, specifically includes at least one group of sand-water-oil separation areas and an anaerobic reaction area 10, each group of sand-water-oil separation areas includes a sand-water separation area 20 and an oil-water separation area 30, each group of sand-water-oil separation areas and the anaerobic reaction area 10 are located in the same tank unit, and each group of sand-water-oil separation areas and the anaerobic reaction area 10 are separated by a first isolation frame 90; the sand-water separation area 20 and the oil-water separation area 30 of the same group are separated by a second isolation frame 80 and a first isolation frame 90, and the upper parts of the sand-water separation area 20 and the oil-water separation area 30 of the same group are communicated; the bottom of each oil-water separation zone 30 is communicated with the bottom of the anaerobic reaction zone 10; a plurality of sloping plates 31 are arranged in each oil-water separation zone 30, and each sloping plate 31 is used for realizing oil-water separation in the oil-water separation zone 30; the middle upper part of the anaerobic reaction zone 10 is provided with a plurality of layers of herringbone plate structures 60, and each herringbone plate structure 60 is used for separating biological sludge and biogas generated by the anaerobic reaction zone 10; a watertight barrier is laid on each of the first and second barrier frames 90 and 80.
Specifically, each of the sand-water separation zones 20 mainly includes a bottom muddy sand and an upper water zone, the oil-water separation zone 30 includes an upper oil-floating zone 40 and a water zone below the oil-floating zone 40, and each of the oil-water separation zones 30 and the water zone above the sand-water separation zone 20 are in communication. The anaerobic reaction zone 10 is mainly divided into three-phase separation zones, including a middle-lower anaerobic reaction sludge zone, a middle-upper double-layer or multi-layer herringbone plate structure 60, and a sediment water outlet zone, and meanwhile, each sand-water separation zone 20 and oil-water separation zone 30 occupy part of the upper space of the anaerobic reaction zone 10, so that a part of the anaerobic reaction sludge zone is positioned below the sand-water separation zone 20 and the oil-water separation zone 30, and the space of the lower part of each group of sand-water-oil separation zones is fully utilized. The first isolation frame 90 comprises a first isolation frame unit 91 and a first isolation frame auxiliary unit 92, wherein the first isolation frame unit 91 and the first isolation frame auxiliary unit 92 form a preset included angle, and preferably the included angle is 90-150 degrees; the second isolation frame 80 is connected to the middle part of the first isolation frame unit 91, and is used for separating the sand-water separation area 20 and the oil-water separation area 30 in the same group, and the sand-water separation area 20 and the upper part of the oil-water separation area 30 in the same group are communicated, so that the wastewater after sand-water separation in the sand-water separation area 20 timely enters the oil-water separation area 30, and the highest level of the first isolation frame auxiliary unit 92 close to each oil-water separation area 30 is higher than the liquid level in the tank body unit, so as to assist in isolating each group of sand-water-oil separation areas from the anaerobic reaction area 10. Wherein, the first isolation frame 90 and the second isolation frame 80 adopt steel constructs or steel concrete frames, and the waterproof baffle has been laid between the steel frames of first isolation frame 90 and second isolation frame 80, waterproof baffle adopts high density polyethylene HDPE, polypropylene PP and polyvinyl chloride PVC etc. material to make to control waterproof baffle's thickness more than or equal to 1.5mm, and then can realize that the water pressure in waterproof baffle upper and lower both sides keeps unanimous, also can adopt panel of corresponding intensity and corrosion resistance to replace simultaneously, and then the combination setting of isolation frame and waterproof baffle can replace traditional whole steel constructs or whole steel concrete structure, effectively reduced the cost. According to the oily wastewater treatment system, different functional areas are divided in the tank body unit, so that the introduced oily wastewater is subjected to multiphase thorough separation, namely, the separation of the muddy sand, the grease, the biological marsh gas, the anaerobic sludge and the reacted clear water, namely five-phase components, can be realized in one reactor, an intermediate water tank and secondary lifting are not needed, the treatment efficiency of the oily wastewater is improved, and the cost expenditure for building the system is reduced.
Further, a stirring structure 21 is arranged in each sand-water separation zone 20, and the stirring structure 21 is placed in the middle of each sand-water separation zone 20. Specifically, under the action of gravity, the sand can be separated from the water; meanwhile, the stirring structure 21 is arranged in the sand-water separation area 20, so that organic matters attached to the sand surface are easily eluted by water flow which is stirred, and the sand separation effect is improved; under the condition that the space of the sand-water separation areas 20 is limited, the stirring structure 21 can be obliquely placed in each sand-water separation area 20, so that a better sand-water separation effect can be realized; generally, the stirring structure 21 is arranged in the middle of the sand-water separation zone 20, so that the sand-water separation effect is further enhanced; and the middle part of the sand-water separation area 20 is provided with an oil-containing wastewater inlet 24 close to the vertical tank wall of the tank body unit, which is used for entering the initial oil-containing wastewater and is controlled by a corresponding first valve 25, and the bottom of the sand-water separation area 20 is provided with a silt outlet 22, and correspondingly, the opening and closing of the sand-water separation area are also controlled by a corresponding second valve 23, so that the two-phase separation effect of water inflow in the middle part and the bottom sand discharge in the sand-water separation area 20 is realized.
Further, the inclined plates 31 are parallel to each other, and each inclined plate is disposed in parallel to the upper portion of the corresponding second separator 80. Specifically, the inclined plate 31 is generally made of polyvinyl chloride (PVC) or glass fiber reinforced plastic (frp) or PP, and the oil-water separation is achieved by using the principle of shallow precipitation, so that the inclined plate 31 is controlled to achieve a horizontal angle, the smaller the angle is, the smaller the oil collecting area is, the more advantageous to discharge the oil layer, but the blocking of the pores between the inclined plates 31 may be caused, the angle is preferably controlled to be 30-60 degrees, and the arrangement of the inclined plate achieves the oil-water separation and the high efficiency separation, in practical operation, the general control time is within 120 min. In addition, the distance between the inclined plates 31 is greater than or equal to 50mm, the inclined plates 31 realize oil-water separation, wherein separated grease floats in the oil-water separation areas 40 with contracted areas, further, oil-water separation outlets 33 are arranged at the upper parts of the oil-water separation areas 30, and the grease is discharged after reaching a certain thickness in the oil-water separation areas 40, namely, whether the grease is discharged or not is controlled through corresponding third valves 41.
Further, the included angle between the first spacer units 91 near the lower part of each group of sand water oil separating areas 20 and the horizontal direction is 45-60 degrees. Specifically, the first spacer unit 91 is generally disposed at an angle with respect to the horizontal direction, that is, the first spacer unit 91 is disposed at an angle with respect to the horizontal direction, and the larger the angle is, the better the mud discharging effect is, but the larger the height of the waste pond is, so that the angle is controlled to be 45-60 degrees, and when the mud and sand at the bottom of the sand-water separation area 20 is deposited to a certain extent, the second valve 23 is opened to discharge the mud and sand at the bottom of the sand-water separation area 20 from the mud and sand outlet 22, and in actual operation, the residence time of the oily wastewater in the sand-water separation area 20 is generally controlled to be within 30min, that is, after the stirring structure 21 continuously stirs for 30min, the mud and sand discharged from the bottom of the sand-water separation area 20 can be opened. Moreover, based on the preset included angle between the first isolation frame unit 91 and the horizontal direction, the inclined first isolation frame unit 91 can play a good guiding role on the biogas generated in the anaerobic reaction zone 10, namely, the generated biogas can float out from bottom to top along the inclined direction of the first isolation frame unit 91, so that the required area and construction cost of the anaerobic reaction zone 10 are effectively reduced.
Further, the bottom of each oil-water separation zone 30 is communicated with the bottom of the anaerobic reaction zone 10 through a plurality of water distribution pipes 70, a plurality of through holes 32 are formed in the bottom of each oil-water separation zone 30, each through hole 32 is matched with a corresponding water distribution pipe 70, one end of each water distribution pipe 70 is connected with the bottom of the oil-water separation zone 30, and the other end of each water distribution pipe is connected with the anaerobic reaction sludge zone.
Further, the bottom of the anaerobic reaction zone 10 is provided with an anaerobic-reaction-post-biological-sludge outlet 11, and the discharge of the anaerobic-reaction-zone-10 bottom biological sludge is controlled by opening a fourth valve 12.
Further, a plurality of overflow tanks 50 are provided at the upper part of the anaerobic reaction zone 10, specifically, the overflow tanks are provided at the sedimentation water outlet area at the upper part of the anaerobic reaction zone, and the bottom of the overflow tanks 50 is provided with corresponding through holes and connected with corresponding connecting pipes 51 for discharging water in the overflow tanks 50 out of the tank unit.
Further, each herringbone plate structure 60 is communicated with a biogas collecting pipe 61, and the biogas collecting pipe 61 is connected with a biogas liquid sealing device 62. Specifically, each herringbone plate structure 60 is composed of two or more herringbone plate structure units, each herringbone plate structure 60 covers the middle upper portion of the anaerobic reaction zone 10 and is simultaneously contacted with or spaced from each first isolation frame 90 and the vertical tank wall of the tank body unit by a preset distance, the preset distance is greater than 0 and less than 200mm, further separation of biological sludge and biogas generated in the anaerobic reaction zone 10 of the tank body unit is ensured, the generated biogas is collected to a communicated collecting pipe 61, and the biogas collecting pipe 61 is connected to a biogas liquid sealing device 62 for biogas treatment, the biogas liquid sealing device 62 can achieve a good sealing effect in the tank body unit, reduce the risk of tempering and detonating the tank body during combustion utilization, and further achieve elimination of potential safety hazards existing in the tank body unit.
Further, as shown in fig. 2, on the basis of the embodiment shown in fig. 1, a structural schematic diagram of a vertical structure of a second embodiment of the oily wastewater treatment system of the present invention is provided, which includes connecting each group of sand-water-oil separation areas with a vertical tank wall of the tank unit in a symmetrical and/or adjacent manner, specifically, on the basis of the above-mentioned five-phase separation of oily wastewater realized by combining a single group of sand-water-oil separation areas with the anaerobic reaction area 10, that is, five different substance phases of grease, silt, biogas, anaerobic biological sludge and supernatant after treatment are separated, and the same anaerobic reaction area is provided, and the oily wastewater in the groups of 2 or more sand-water separation areas is alternately introduced into the sand-water separation areas 20 and shared by the anaerobic reaction area 10, wherein each sand-water-oil separation area can be adjacently and/or symmetrically arranged in the tank unit and is connected with the vertical tank wall of the tank unit, thereby realizing isolation of different functional areas, and the same anaerobic reaction area 10 can be divided into groups, the anaerobic reaction area can have increased water inflow and sedimentation areas, the anaerobic reaction area can have increased mixing strength and reduced mixing effect, and the mixing effect can be improved.
In the above examples, the prior art can be adopted by those skilled in the art for software control, and the present invention is merely directed to the structure of the oily wastewater treatment system and the connection relationship with each other.
The foregoing description of the preferred embodiments of the present invention should not be construed as limiting the scope of the invention, but rather as utilizing equivalent structural changes made in the description of the present invention and the accompanying drawings, or as being directly/indirectly applicable to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. The oil-containing wastewater treatment system is characterized by comprising at least one group of sand-water-oil separation areas and an anaerobic reaction area, wherein each group of sand-water-oil separation areas comprises a sand-water separation area and an oil-water separation area, and the sand-water-oil separation areas and the anaerobic reaction areas are positioned in the same tank unit;
each group of sand water oil separation areas are separated from the anaerobic reaction area by a first isolation frame; the sand-water separation areas and the oil-water separation areas of the same group are separated by a second isolation frame and a first isolation frame, the sand-water separation areas and the upper parts of the oil-water separation areas of the same group are communicated, each sand-water separation area is internally provided with a stirring structure, the stirring structure is placed in the middle part of each sand-water separation area, and the middle part of each sand-water separation area is provided with an oil-containing wastewater inlet;
the bottom of each oil-water separation zone is communicated with the bottom of the anaerobic reaction zone, the bottom of each oil-water separation zone is communicated with the bottom of the anaerobic reaction zone through a plurality of water distribution pipes, a plurality of through holes are formed in the bottom of each oil-water separation zone, and each through hole is matched with the corresponding water distribution pipe;
a plurality of sloping plates are arranged in each oil-water separation zone, and each sloping plate is used for realizing oil-water separation in the oil-water separation zone; the middle upper part of the anaerobic reaction zone is provided with a plurality of layers of herringbone plate structures, and each herringbone plate structure is used for separating biological sludge and biogas generated in the anaerobic reaction zone;
and watertight partitions are paved on each first isolation frame and each second isolation frame.
2. The oily wastewater treatment system of claim 1, wherein each inclined plate is parallel to each other and forms an angle of 30-60 degrees with the horizontal, and each inclined plate is disposed parallel to the upper portion of the corresponding second spacer.
3. The oil-containing wastewater treatment system according to claim 1, wherein each first spacer is composed of a first spacer unit and a first spacer auxiliary unit having a predetermined angle, and the angle between the first spacer unit near the lower part of each group of sand-water-oil separation areas and the horizontal direction is 45-60 degrees.
4. An oily wastewater treatment system according to claim 3, wherein the highest level of the first spacer auxiliary unit adjacent each of the oil-water separation zones is higher than the liquid level in the tank unit.
5. The oil-containing wastewater treatment system according to claim 1, wherein a silt outlet is formed in the bottom of each silt-water separation zone, a biological silt outlet after anaerobic reaction is formed in the bottom of each anaerobic reaction zone, a floating oil outlet is formed in the upper portion of each oil-water separation zone, and a plurality of overflow tanks are formed in the upper portion of each anaerobic reaction zone.
6. The oily wastewater treatment system of claim 1, wherein each chevron structure is in communication with a biogas collection tube, the biogas collection tube being connected to a biogas treatment device.
7. An oily wastewater treatment system according to any one of claims 1 to 6, wherein each set of sand-water-oil separation zones is connected to the vertical walls of the cell unit in a symmetrical and/or adjacent manner.
8. The oily wastewater treatment system of claim 7, wherein each chevron structure covers a middle upper portion of the anaerobic reaction zone and is simultaneously in contact with or spaced a predetermined distance from each first spacer and a vertical tank wall of the tank unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111025069.6A CN113754186B (en) | 2021-09-02 | 2021-09-02 | Oily wastewater treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111025069.6A CN113754186B (en) | 2021-09-02 | 2021-09-02 | Oily wastewater treatment system |
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| Publication Number | Publication Date |
|---|---|
| CN113754186A CN113754186A (en) | 2021-12-07 |
| CN113754186B true CN113754186B (en) | 2023-07-25 |
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|---|---|---|---|
| CN202111025069.6A Active CN113754186B (en) | 2021-09-02 | 2021-09-02 | Oily wastewater treatment system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2766932Y (en) * | 2005-01-24 | 2006-03-29 | 晁建伟 | Oil-gas-water-solid four phase separating and filtering apparatus |
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2021
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