CN117534190A - Axial three-phase vortex mixing device and system - Google Patents
Axial three-phase vortex mixing device and system Download PDFInfo
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- CN117534190A CN117534190A CN202311525065.3A CN202311525065A CN117534190A CN 117534190 A CN117534190 A CN 117534190A CN 202311525065 A CN202311525065 A CN 202311525065A CN 117534190 A CN117534190 A CN 117534190A
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- inner cylinder
- vortex mixing
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- 239000003814 drug Substances 0.000 claims abstract description 60
- 238000002347 injection Methods 0.000 claims abstract description 31
- 239000007924 injection Substances 0.000 claims abstract description 31
- 239000007788 liquid Substances 0.000 claims description 15
- 239000012530 fluid Substances 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 18
- 239000010865 sewage Substances 0.000 abstract description 13
- 238000004090 dissolution Methods 0.000 abstract description 6
- 239000003657 drainage water Substances 0.000 abstract 1
- 239000012071 phase Substances 0.000 description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 238000000034 method Methods 0.000 description 7
- 238000005188 flotation Methods 0.000 description 5
- 238000005238 degreasing Methods 0.000 description 4
- 230000010349 pulsation Effects 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
-
- 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
- C02F1/24—Treatment of water, waste water, or sewage by flotation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
Abstract
The invention discloses an axial three-phase vortex mixing device and an axial three-phase vortex mixing system. The three-phase vortex mixing device comprises an upper cylinder and a lower cylinder which are connected with each other, wherein the upper end of the upper cylinder forms an axial inlet, the lower end of the lower cylinder forms a mixing outlet, and the middle upper part of the upper cylinder is provided with a medicament injection pipe; an inner cylinder is arranged in the lower cylinder body, the upper end of the inner cylinder is closed, and a porous plate is arranged at the lower end of the inner cylinder; a plurality of guide vanes are arranged between the inner cylinder and the lower cylinder, and the guide vanes are attached to the surfaces of the inner cylinder and the lower cylinder; the gas injection pipe penetrates through the side wall of the lower cylinder body and the guide vane to be communicated with the inner cylinder. The device integrates gas dissolution and medicament mixing, has compact structure, high-efficiency gas dissolution and mixing effects, and is suitable for various oily sewage treatment occasions with simple flow requirements, limited space and high drainage water quality requirements.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to an axial three-phase vortex mixing device and system.
Background
Along with the continuous development of oil fields, the produced liquid has high water content, serious emulsification and great water treatment difficulty. The dissolved air floatation technology is a common water treatment technology. Under a certain pressure condition, the gas is dissolved in the oily sewage, and released under reduced pressure, so that the gas is separated out from the oily sewage in the form of tiny bubbles, and the bubbles are adhered to oil drops under the cooperation of a water treatment agent (hereinafter referred to as the agent) to form air-entraining floccules with apparent density far less than that of water, and quickly float to the water surface, thereby achieving the purpose of oil-water separation. The more uniformly the oily sewage, the bubbles and the medicament are mixed, the more efficiently the bubbles and the medicament are adhered to oil drops, the higher the oil-water separation efficiency is, and the size of the air floatation device can be correspondingly reduced.
The existing dissolved air floatation technology has the defects of large occupied area of air floatation equipment and related dissolved air equipment, complex flow, low medicament utilization rate, large actual dosage and the like caused by insufficient medicament and oil drop effects. For example, both the Chinese patent No. 105642145B and the Chinese patent No. CN107921386B disclose a static mixer which can uniformly mix two liquids, but can not realize the air dissolving function; as another example, chinese patent No. 110240215a discloses a tangential three-phase mixer, which can realize mixing of bubbles, a medicament and oily sewage, but because of adopting a multi-tangential hole design, the oily sewage and the medicament at the inlet flow out from the tangential holes near the inlet side more easily, the flow distribution of the whole device is uneven, which results in uneven medicament concentration distribution, meanwhile, the stretching effect of vortex on the medicament flocs is not obvious, the contact surface of the bubbles, oil drops and the medicament flocs is small, the net capturing, wrapping and bridging effects of the medicament are weaker, the dosage of the water treatment medicament is still larger, and the air flotation effect is not obvious.
Disclosure of Invention
The invention provides an axial three-phase vortex mixing device and an axial three-phase vortex mixing system for solving the technical problems. The three-phase vortex mixing device has controllable vortex intensity, can realize high-efficiency gas dissolution, can realize uniform mixing of medicament, bubbles and oily sewage, can pretreat the oily sewage, can improve the air flotation degreasing effect, can effectively reduce the size of air flotation equipment, and can simplify the air flotation process.
In a first aspect, the present invention provides an axial three-phase vortex mixing apparatus, which is implemented by adopting the following technical scheme.
An axial three-phase vortex mixing device comprises an upper cylinder and a lower cylinder which are connected with each other, wherein the upper end of the upper cylinder forms an axial inlet, the lower end of the lower cylinder forms a mixing outlet, and the middle upper part of the upper cylinder is provided with a medicament injection pipe; an inner cylinder is arranged in the lower cylinder body, the upper end of the inner cylinder is closed, and a porous plate is arranged at the lower end of the inner cylinder; a plurality of guide vanes are arranged between the inner cylinder and the lower cylinder, and the guide vanes are attached to the surfaces of the inner cylinder and the lower cylinder; the gas injection pipe penetrates through the side wall of the lower cylinder body and the guide vane to be communicated with the inner cylinder.
Further, the medicament injection pipe stretches into the upper cylinder, and the medicament injection point is located on the axis of the upper cylinder.
Furthermore, the front end of the medicament injection tube adopts a 45-degree chamfer section, and the chamfer section faces away from the axial inlet.
Further, the upper cylinder body comprises a straight cylinder section and a reducing section, and the ratio of the length of the reducing section to the length of the straight cylinder section is (0.5-1.0): 1; the diameter of the straight section is the same as that of the liquid inlet pipe; the diameter of the upper end of the reducing section is the same as that of the straight cylinder section, and the diameter of the lower end of the reducing section is the same as that of the lower cylinder body.
Further, the diameter of the lower cylinder is related to the axial inlet flow, and the average section axial flow velocity of the fluid flowing through the lower cylinder is 1-20 m/s; the length of the lower cylinder body is less than or equal to 1m.
Further, the top end of the inner cylinder is elliptic, and the distance from the top end of the lower cylinder is 0-20 cm.
Further, the ratio of the diameter of the inner cylinder to the diameter of the lower cylinder is (0.5-0.95): 1; the ratio of the length of the inner cylinder to the length of the lower cylinder is (0.2-0.6): 1.
Further, the lower end of the inner cylinder is provided with a tapered section, the length of the tapered section is less than or equal to 15cm, and the bottom end of the tapered section is provided with a porous plate.
Further, the number of the guide vanes is 2-6; the connection point of the gas injection pipe and the guide vane is positioned at the center of the guide vane.
In a second aspect, the present invention provides an axial three-phase vortex mixing system, which is implemented by adopting the following technical scheme.
An axial three-phase vortex mixing system comprises a plurality of stages of axial three-phase vortex mixing devices which are connected in series, wherein the series number is less than or equal to 6; the spiral direction of each stage of guide vanes is the same or opposite.
The present application has the following advantageous effects.
1. The inlet and outlet pipelines and the cylinders of the three-phase vortex mixing device are provided with the standard flanges, and meanwhile, the axial design is compact in volume, so that the connection and the installation can be conveniently and rapidly carried out;
2. the medicament injection pipe extends into the upper cylinder body to avoid layered flow of the medicament injection pipe and the upper cylinder body, and the inclined cross section is adopted, so that turbulent flow pulsation of inlet incoming liquid can be fully utilized, and full mixing of medicament and inlet incoming liquid is promoted;
3. the upper cylinder body adopts a gradually expanding design, so that dead zones are avoided when fluid flows, and the stability of fluid flow is ensured;
4. the top end of the inner cylinder is ellipsoidal, so that the impact of liquid can be relieved, the breakage of medicine floccules due to the impact is avoided, and meanwhile, the medicine floccules are uniformly split; the inner cylinder cavity design can buffer fluctuation of air inflow and ensure air dissolving effect;
5. the axial guide vane design can form stable and uniform vortex with controllable strength, stretch and improve the effect on the bulk medicament flocs, increase the contact area of the medicament flocs and oil drops, and simultaneously promote the medicament flocculation by vortex stirring, so that on one hand, the trapping of the oil drops is enhanced, on the other hand, the dissolution of bubbles on the medicament flocs is promoted, and the oil-water separation effect in the subsequent flotation process is improved;
6. the design of the porous plate can divide continuous gas, promote the gas to be dissolved more efficiently, and meanwhile, the porous plate can adopt smooth scale-inhibiting materials to prevent the porous plate from scaling and blocking;
7. the three-phase vortex mixing device can be used in series in multiple stages, and the mixing and gas dissolving effects are enhanced.
Drawings
FIG. 1 is a cross-sectional view of an axial three-phase vortex mixing apparatus of the present invention;
FIG. 2 is a schematic view of the structure of the inner barrel, guide vanes and perforated plate of the present invention;
fig. 3 is a schematic diagram of an axial three-phase vortex mixing system of the present invention.
Wherein, 1. An axial inlet; 2. a drug injection tube; 3. an upper cylinder; 4. a lower cylinder; 5. a gas injection tube; 6. an inner cylinder; 7. a porous plate; 8. a guide vane; 9. a mixing outlet.
Detailed Description
The invention will be further described with reference to the drawings and examples.
As shown in fig. 1-3, an axial three-phase vortex mixing device comprises an outer shell part consisting of an upper barrel 3 and a lower barrel 4; an inlet and outlet pipeline part consisting of an axial inlet 1, a medicament injection pipe 2, a gas injection pipe 5 and a mixing outlet 9; the inner structure consists of guide vanes 8, an inner cylinder 6 and a porous plate 7. Wherein the axial inlet 1, the upper cylinder 3, the lower cylinder 4, the inner cylinder 6 and the porous plate 7 are positioned on the same axis; the axial inlet 1 is positioned at the top of the upper cylinder body 3, the medicament injection pipe 2 is positioned at the middle upper part of the upper cylinder body 3 and is vertically communicated with the side wall surface of the upper cylinder body 3, and the axial inlet 1, the medicament injection pipe 2 and the upper cylinder body 3 form a medicament mixing section together; the mixing outlet 9 is positioned at the bottom of the lower cylinder 4, the inner cylinder 6 is positioned at the middle upper part in the lower cylinder 4, the guide vane 8 is positioned between the inner cylinder 6 and the lower cylinder 4 and is tightly attached to the surfaces of the inner cylinder 6 and the lower cylinder 4; the gas injection pipe 5 is vertical to the side wall surface of the lower cylinder 4, and is communicated with the inner cylinder 6 through the side wall of the lower cylinder 4 and the guide vane 8, and the connection point of the gas injection pipe 5 and the guide vane 8 is positioned at the center of the guide vane 8; the porous plate 7 is positioned at the bottom of the inner cylinder 6; the guide vane 8, the lower cylinder 4, the inner cylinder 6 and the porous plate 7 form a three-phase vortex mixing section integrating vortex mixing and dissolved gas.
Specifically, the upper cylinder body 3 comprises a straight cylinder section and a reducing section connected with the lower end of the straight cylinder section, and the ratio of the length of the reducing section to the length of the straight cylinder section is (0.5-1.0): 1. The diameter of the straight section is consistent with that of the liquid inlet pipe, and the straight section and the liquid inlet pipe are connected through a flange. The diameter of the upper end of the reducing section is consistent with that of the straight cylinder section, and the diameter of the lower end of the reducing section is consistent with that of the lower cylinder body 4.
As shown in fig. 1, the medicine injection tube 2 is located at the middle position of the straight section of the upper cylinder and extends into the upper cylinder 3, and the medicine injection point is located on the axis of the upper cylinder 3; the front end of the medicament injection tube 2 adopts a 45-degree chamfer section, and the chamfer section faces away from the axial inlet 1. Under the turbulent flow pulsation effect of the incoming liquid, the medicament near the axis of the upper cylinder body 3 can be well mixed with the incoming liquid in a preliminary step, and then can be uniformly distributed, and enters the guide vane 8 flow channel to be uniformly mixed with dissolved gas in the next step.
The diameter of the lower cylinder 4 is related to the flow of the axial inlet 1, and the diameter of the lower cylinder can maintain the average section axial flow velocity between 1m/s and 20m/s when fluid flows through; the length of the lower cylinder 4 does not exceed 1m.
As shown in fig. 1, the inner cylinder 6 is internally provided with a cavity, the top end of the inner cylinder is ellipsoidal and is 0-20 cm away from the top end of the lower cylinder 4; the ratio of the diameter of the inner cylinder 6 to the diameter of the lower cylinder 4 is (0.5-0.95): 1; the ratio of the length of the inner cylinder 6 to the length of the lower cylinder 4 is (0.2-0.6): 1; the lower end of the inner cylinder 6 forms a tapered section, the length of the tapered section is not more than 15cm, the bottom end of the tapered section is provided with a porous plate 7, the connecting edge is subjected to chamfering treatment, and the aperture number of the porous plate 7 can be changed according to the gas dissolving effect. The upper end and the lower end of the inner cylinder 6 are designed gradually, so that flow blind areas are eliminated, and the breakage of medicament flocs caused by severe changes of a local flow field can be avoided; meanwhile, the cavity design of the inner cylinder 6 can buffer incoming gas, so that the stability of a gas dissolving process is enhanced, and the dissolution of gas is facilitated; the bottom of the inner cylinder 6 is provided with the porous plate 7, and when the gas passes through the porous plate 7, the gas is divided into a plurality of small air flows, so that the contact area between the gas and the incoming liquid is increased, and the dissolution of the gas in the incoming liquid is further promoted.
As shown in FIG. 2, the guide vanes 8 are axially designed, the number of the guide vanes 8 is 2-6, and a plurality of guide vanes 8 are uniformly distributed in an annular area between the inner cylinder 6 and the lower cylinder 4, and the spiral directions are the same. The incoming liquid can be uniformly distributed into a flow channel formed by two adjacent guide vanes 8, and flows out tangentially under the guidance of the guide vanes 8 to form vortex; the bulk medicine floccules stretch in the vortex to improve the effect, so that the surface area of the medicine floccules is increased, and the capture of the medicine floccules on oil drops is enhanced; for different medicaments, the vortex intensity can be regulated by changing the flow or the number of the guide vanes 8, and the vortex intensity is uniform and controllable; meanwhile, in the process of mixing gas, medicament and oil drops in vortex, the gas is dissolved on medicament flocs, and in the subsequent air floatation degreasing stage, the gas is separated out in the medicament flocs due to pressure reduction, so that ultra-light air-sandwiched flocs are formed, and the buoyancy of the medicament flocs is accelerated.
As shown in FIG. 3, the invention also provides an axial three-phase vortex mixing system, which connects the three-phase vortex mixing devices in series in a plurality of stages, wherein the series number is not more than 6, so as to ensure the mixing effect and the gas dissolving effect. When the multiple stages are connected in series, if the air intake of each stage is not needed, the gas injection pipe 5 of the stage can be canceled, meanwhile, the porous plate 7 is canceled, and the bottom of the inner cylinder 6 is closed; if dosing of each stage is not required, the medicament injection tube 2 of that stage may be eliminated. Meanwhile, the spiral direction of each stage of guide vane 8 can be set to be opposite, so that the fluid is ensured to alternately rotate clockwise and anticlockwise in the lower cylinder 4, and the mixing and gas dissolving effects are further enhanced.
The working process of the invention is as follows:
the oily sewage and the medicament respectively enter a medicament mixing section of the three-phase vortex mixing device from an axial inlet 1 and a medicament injection pipe 2, are primarily mixed under the action of turbulent pulsation, enter a flow passage of a guide vane 8, and tangentially flow out under the guidance of the guide vane 8 to form vortex. The bulk medicine floccules are stretched under the radial shearing action of the vortex, so that the contact area of the medicine floccules and the oily sewage is increased, and the net capturing, wrapping and bridging effects of the medicine floccules on oil drops are enhanced. The high-pressure compressed gas enters the buffer cavity of the inner cylinder 6 through the gas injection pipe 5, is cut into small gas flow through the porous plate 7, then contacts with liquid phases such as oily sewage, medicament floc and the like, and is dissolved in the liquid phases under the interaction of vortex flow and gas-liquid two-phase pressure difference. After a plurality of stages of mixing and gas dissolving, the oily sewage, the medicine floccules and the dissolved gas are discharged through a mixing outlet 9, so that the pretreatment of the oily sewage is realized.
The axial three-phase vortex mixing device has compact structure and convenient installation, saves equipment such as a dissolved air tank, a circulating water pump and the like in the air-floatation degreasing process flow, simplifies the air-floatation degreasing process flow, and reduces the occupied area; the design of the axial guide vane ensures that the vortex is uniformly distributed and the strength is controllable, so that the utilization rate of the medicament can be obviously improved, and the medicament consumption is saved; the multistage serial connection design can meet different water quality requirements, and has wide applicability.
The embodiments of the present invention are all preferred embodiments of the present invention, and are not intended to limit the scope of the present invention in this way, therefore: all equivalent changes in structure, shape and principle of the invention should be covered in the scope of protection of the invention.
Claims (10)
1. The utility model provides an axial three-phase vortex mixing arrangement, includes interconnect's last barrel (3) and lower barrel (4), goes up the upper end of barrel (3) and forms axial entry (1), and the lower extreme of lower barrel (4) forms mixing outlet (9), its characterized in that: the middle upper part of the upper cylinder body (3) is provided with a medicament injection pipe (2); an inner cylinder (6) is arranged in the lower cylinder body (4), the upper end of the inner cylinder (6) is closed, and a porous plate (7) is arranged at the lower end of the inner cylinder; a plurality of guide vanes (8) are arranged between the inner cylinder (6) and the lower cylinder (4), and the guide vanes (8) are attached to the surfaces of the inner cylinder (6) and the lower cylinder (4); the gas injection pipe (5) penetrates through the side wall of the lower cylinder body (4) and the guide vane (8) to be communicated with the inner cylinder (6).
2. An axial three-phase vortex mixing device according to claim 1, characterized in that: the medicament injection pipe (2) stretches into the upper cylinder (3), and the medicament injection point is positioned on the axis of the upper cylinder (3).
3. An axial three-phase vortex mixing device according to claim 1, characterized in that: the front end of the medicament injection tube (2) adopts a 45-degree chamfer section, and the chamfer section faces away from the axial inlet (1).
4. An axial three-phase vortex mixing device according to claim 1, characterized in that: the upper cylinder body (3) comprises a straight cylinder section and a reducing section, and the ratio of the length of the reducing section to the length of the straight cylinder section is (0.5-1.0): 1; the diameter of the straight section is the same as that of the liquid inlet pipe; the diameter of the upper end of the reducing section is the same as that of the straight cylinder section, and the diameter of the lower end of the reducing section is the same as that of the lower cylinder body (4).
5. An axial three-phase vortex mixing device according to claim 1, characterized in that: the diameter of the lower cylinder (4) is related to the flow rate of the axial inlet (1), and the average section axial flow velocity of the fluid flowing through the lower cylinder (4) is 1-20 m/s; the length of the lower cylinder body (4) is less than or equal to 1m.
6. An axial three-phase vortex mixing device according to claim 1, characterized in that: the top end of the inner cylinder (6) is elliptic, and the distance from the top end of the lower cylinder (4) is 0-20 cm.
7. An axial three-phase vortex mixing device according to claim 1, characterized in that: the ratio of the diameter of the inner cylinder (6) to the diameter of the lower cylinder (4) is (0.5-0.95): 1; the ratio of the length of the inner cylinder (6) to the length of the lower cylinder (4) is (0.2-0.6): 1.
8. An axial three-phase vortex mixing device according to claim 1, characterized in that: the lower end of the inner cylinder (6) forms a tapered section, the length of the tapered section is less than or equal to 15cm, and the bottom end of the tapered section is provided with a porous plate (7).
9. An axial three-phase vortex mixing device according to claim 1, characterized in that: the number of the guide vanes (8) is 2-6; the connecting point of the gas injection pipe (5) and the guide vane (8) is positioned at the center of the guide vane (8).
10. An axial three-phase vortex mixing system, characterized in that: the axial three-phase vortex mixing device comprises a plurality of stages of the axial three-phase vortex mixing devices which are connected in series, wherein the series number is less than or equal to 6; the spiral direction of each stage of guide vanes (8) is the same or opposite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311525065.3A CN117534190A (en) | 2023-11-16 | 2023-11-16 | Axial three-phase vortex mixing device and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311525065.3A CN117534190A (en) | 2023-11-16 | 2023-11-16 | Axial three-phase vortex mixing device and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117534190A true CN117534190A (en) | 2024-02-09 |
Family
ID=89785564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311525065.3A Pending CN117534190A (en) | 2023-11-16 | 2023-11-16 | Axial three-phase vortex mixing device and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117534190A (en) |
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2023
- 2023-11-16 CN CN202311525065.3A patent/CN117534190A/en active Pending
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