CN220012220U - Cyclone dissolved air flotation device - Google Patents
Cyclone dissolved air flotation device Download PDFInfo
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- CN220012220U CN220012220U CN202320952421.9U CN202320952421U CN220012220U CN 220012220 U CN220012220 U CN 220012220U CN 202320952421 U CN202320952421 U CN 202320952421U CN 220012220 U CN220012220 U CN 220012220U
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- outer tank
- tank body
- dissolved air
- cyclone
- pipeline
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- 238000009300 dissolved air flotation Methods 0.000 title claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000007599 discharging Methods 0.000 claims abstract description 6
- 238000010992 reflux Methods 0.000 claims abstract description 4
- 239000007921 spray Substances 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 4
- 238000000926 separation method Methods 0.000 abstract description 15
- 230000000694 effects Effects 0.000 abstract description 6
- 239000007788 liquid Substances 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 21
- 239000010865 sewage Substances 0.000 description 8
- 238000005188 flotation Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 239000000945 filler Substances 0.000 description 6
- 241000758789 Juglans Species 0.000 description 3
- 235000009496 Juglans regia Nutrition 0.000 description 3
- 239000006004 Quartz sand Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- 235000020234 walnut Nutrition 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 230000036632 reaction speed Effects 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Cyclones (AREA)
Abstract
The utility model provides a cyclone dissolved air flotation device, which comprises: an outer can; the inner tank cylinder is positioned in the outer tank body; the water inlet pipe penetrates through the outer tank body and is tangentially connected with the inner tank barrel; the reflux pipeline penetrates through the outer tank body and is tangentially connected with the inner tank barrel; wherein, the top of the outer tank body is provided with an air outlet, and the bottom of the outer tank body is provided with a main drain pipe; the upper part of the inner side of the outer tank body is provided with an oil collecting groove, one side of the oil collecting groove close to the inner tank cylinder is higher than one side of the outer tank body, and the joint of the oil collecting groove and the outer tank body is also provided with an oil discharging pipeline which leads to the outer side of the outer tank body. According to the utility model, through the tangential water inlet of the water inlet pipeline and the return pipeline, the centrifugal force of liquid rotation is increased, and the separation effect is improved; the gas is added into the return pipeline to generate gas-dissolved water, so that the separation effect is improved.
Description
Technical Field
The utility model relates to the technical field of sewage treatment, in particular to a rotational flow dissolved air flotation device.
Background
The petroleum and petrochemical industry can produce a large amount of oily sewage in the production processes of petroleum exploitation, treatment, crude oil extraction and the like, and the common oil-water separation method mainly comprises the following steps: the methods of gravity sedimentation separation, air floatation, hydrocyclone separation, filtration separation and the like have respective advantages and disadvantages and application ranges, wherein the air floatation separation technology has wide application range, low investment, low operation and maintenance cost and the like due to mature technology and has been widely applied to the treatment of petroleum and chemical oily sewage;
at present, the cyclone air floatation technology is paid attention to gradually, the development of the cyclone air floatation technology is also greatly improved in recent years, a plurality of cyclone air floatation separators are sequentially arranged, but the cyclone air floatation technology is mainly introduced on the basis of the traditional air floatation technology, for example, chinese patent CN201420341702.1 provides a novel compact air floatation separation device, and the device has the following defects: insufficient centrifugal strength and air bubbles, and poor water and oil separation effects.
Accordingly, there is a deficiency in the prior art, and there is a need to provide a new apparatus that solves the above-mentioned problems.
Disclosure of Invention
Aiming at the problems existing in the prior art, the utility model provides a rotational flow dissolved air flotation device.
In order to achieve the above object, the present utility model is specifically as follows:
the utility model provides a cyclone dissolved air flotation device, which comprises:
an outer can;
an inner tank cylinder positioned inside the outer tank body;
the water inlet pipe penetrates through the outer tank body and is tangentially connected with the inner tank barrel;
the reflux pipeline penetrates through the outer tank body and is tangentially connected with the inner tank barrel;
wherein, the top of the outer tank body is provided with an air outlet, and the bottom of the outer tank body is provided with a main drain pipe;
the upper part of the inner side of the outer tank body is provided with an oil collecting groove, one side of the oil collecting groove, which is close to the inner tank cylinder, is higher than one side of the outer tank body, and the joint of the oil collecting groove and the outer tank body is also provided with an oil discharging pipeline which leads to the outer side of the outer tank body; the area below the upper air outlet of the inner tank is a flotation separation area.
Further, the return pipeline is also connected with a dissolved air pump, and the dissolved air pump is also respectively connected with a dissolved air source pipeline and a primary drain pipe.
Further, the secondary drain pipe is connected with the lower end of the outer tank body.
Further, a release device is arranged at one end of the return pipeline, which is positioned at the inner tank barrel.
Further, an internal part for filtering is arranged below the oil collecting groove and between the inner tank barrel and the outer tank body.
Further, the upper layer of the inner piece is a silk screen filler matched with walnut shells and quartz sand filter materials, and the lower layer is an inclined plate filler.
Further, a demister is arranged below the air outlet on the inner side of the outer tank body.
Further, a rotary spray head is arranged on the inner side of the top of the outer tank body.
The technical scheme of the utility model has the following beneficial effects:
1. through the tangential water inlet of the water inlet pipeline and the return pipeline, the centrifugal force of liquid rotation is increased, and the separation effect is improved;
2. the gas is added into the return pipeline to generate gas-dissolved water, so as to increase the separation effect,
3. compared with the traditional dissolved air flotation, the method has the advantages of shorter effective reaction time, high treatment efficiency and high reaction speed;
4. compared with the traditional dissolved air flotation, the method has the advantages that the diameter of bubbles is smaller, the flotation efficiency of the bubbles is higher, the gas consumption is less, and the energy consumption is low;
5. compared with the traditional dissolved air floatation, the internal smooth flow field structure is more reasonable, the structure is more compact, and the occupied area is smaller.
Drawings
Fig. 1 is a schematic diagram of the principles of the present utility model.
In the figure:
1. an outer can; 2. an inner tank; 3. a dissolved air source pipeline; 4. a return line; 5. a dissolved air pump; 6. a main drain pipe; 7. a water inlet pipeline; 8. a release device; 9. an inner member; 10. an oil discharge pipeline; 11. an oil collecting tank; 12. an air outlet; 13. a demister; 14. rotating the spray head; 15. a flotation separation zone; 16. and a secondary drain pipe.
Detailed Description
The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.
In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "front", "rear", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements 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 utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.
As shown in fig. 1, the present utility model provides a cyclone dissolved air flotation device, comprising: an outer tank 1; the inner tank barrel 2 is positioned inside the outer tank body 1; the water inlet pipe penetrates through the outer tank body 1 and is tangentially connected with the inner tank barrel 2; the reflux pipeline 4 penetrates through the outer tank body 1 and is tangentially connected with the inner tank barrel 2; wherein, the top of the outer tank 1 is provided with an air outlet 12, and the bottom of the outer tank 1 is provided with a main drain pipe 6; the upper part of the inner side of the outer tank body 1 is provided with an oil collecting groove 11, one side of the oil collecting groove 11 close to the inner tank barrel 2 is higher than one side of the outer tank body 1, the joint of the oil collecting groove 11 and the outer tank body 1 is also provided with an oil discharging pipeline 10, the oil discharging pipeline 10 leads to the outer side of the outer tank body 1, and the area below an upper air outlet 12 of the inner tank barrel 2 is a flotation separation area 15. The return pipeline 4 is also connected with a dissolved air pump 5, and the dissolved air pump 5 is also respectively connected with a dissolved air source pipeline 3 and a primary drain pipe 16; the secondary drain pipe 16 is connected with the lower end of the outer tank body 1; the return pipeline 4 is also provided with a release device 8 at one end of the inner tank 2; an inner piece 9 for filtering is arranged below the oil collecting groove 11 between the inner tank cylinder 2 and the outer tank body 1; the upper layer of the inner piece 9 is a silk screen filler matched with walnut shells and quartz sand filter materials, and the lower layer is an inclined plate filler; the inner side of the outer tank body 1 is positioned below the air outlet 12 and is also provided with a demister 13; the inner side of the top of the outer tank 1 is also provided with a rotary spray head 14.
The principle of the utility model is as follows:
the oily sewage enters the inner tank barrel 2 tangentially through the water inlet pipeline 7 to form rotational flow; the effluent of the secondary drain pipe 16 and the gas of the dissolved gas source pipeline 3 are converged and enter the dissolved gas pump 5, then dissolved gas water which is generated by full pressurization and mixing and carries a large number of microbubbles is returned to the inner tank barrel 2 through the return pipeline 4, and is fully contacted and mixed with the initial rotational flow inlet water through the release device 8, the microbubbles carry oil drops to gradually move towards the middle of the inner tank barrel 2 and rise to the flotation separation area 15, the bubbles are separated out, the oil drops are converged to form oil floating residues, and the oil floating residues are collected through the oil collecting tank 11 and then discharged through the oil discharging pipeline 10; meanwhile, the sewage after flotation moves downwards, and then is further treated by the upper layer of the inner piece 9, together with the silk screen filler of the walnut shell and the quartz sand filter material and the lower layer of the sloping plate filler in sequence, and then is converged at the bottom of the outer tank 1, one part of the sewage is discharged through the main drain pipe 6, and the other part of the sewage returns to the dissolved air pump 5 through the secondary drain pipe 16 for recycling; the separated gas is further processed by the rotary spray head 14 and the demister 13 and then discharged from the gas outlet 12 at the top of the outer tank body 1, so that the sewage achieves the effect of three-phase separation.
Compared with the traditional dissolved air flotation device, the cyclone dissolved air flotation device has the following advantages:
(1) Compared with the traditional dissolved air flotation device, the effective reaction time (15-40 min) of the cyclone dissolved air flotation device is shorter (less than or equal to 5 min), the treatment efficiency is high, and the reaction speed is high;
(2) Compared with the traditional dissolved air flotation device with the bubble diameter (30-100 mu m), the cyclone dissolved air flotation device has smaller bubble diameter (5-30 mu m), higher bubble flotation efficiency, less gas consumption and low energy consumption;
(3) Compared with the traditional dissolved air flotation device, the internal smooth flow field structure of the cyclone dissolved air flotation device is more reasonable, the structure is more compact, and the occupied area is smaller (only 1/3 of that of the traditional device).
(4) Compared with the traditional dissolved air flotation device, the oil removal efficiency (60-85%) is higher (more than 90%), and the application scene is wider.
The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the present utility model.
Claims (5)
1. A cyclone dissolved air flotation device, comprising:
an outer can;
an inner tank cylinder positioned inside the outer tank body;
the water inlet pipe penetrates through the outer tank body and is tangentially connected with the inner tank barrel;
the reflux pipeline penetrates through the outer tank body and is tangentially connected with the inner tank barrel;
wherein, the top of the outer tank body is provided with an air outlet, and the bottom of the outer tank body is provided with a main drain pipe;
the upper part of the inner side of the outer tank body is provided with an oil collecting groove, one side of the oil collecting groove, which is close to the inner tank cylinder, is higher than one side of the outer tank body, and the joint of the oil collecting groove and the outer tank body is also provided with an oil discharging pipeline which leads to the outer side of the outer tank body;
the return pipeline is also connected with a dissolved air pump which is also respectively connected with a dissolved air source pipeline and a primary drain pipe;
the return pipeline is located at one end of the inner tank barrel and is further provided with a release device.
2. The cyclone dissolved air flotation device according to claim 1, wherein the secondary drain pipe is connected to a lower end of the outer tank.
3. The cyclone dissolved air flotation device according to claim 1, wherein an internal piece for filtering is further arranged below the oil collecting tank between the inner tank and the outer tank.
4. The cyclone dissolved air flotation device according to claim 1, wherein a demister is further arranged below the air outlet on the inner side of the outer tank.
5. The cyclone dissolved air flotation device of claim 1, wherein a rotary spray head is further provided on the inside of the top of the outer tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320952421.9U CN220012220U (en) | 2023-04-20 | 2023-04-20 | Cyclone dissolved air flotation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320952421.9U CN220012220U (en) | 2023-04-20 | 2023-04-20 | Cyclone dissolved air flotation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220012220U true CN220012220U (en) | 2023-11-14 |
Family
ID=88677218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320952421.9U Active CN220012220U (en) | 2023-04-20 | 2023-04-20 | Cyclone dissolved air flotation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220012220U (en) |
-
2023
- 2023-04-20 CN CN202320952421.9U patent/CN220012220U/en active Active
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