CN112759140B - Vortex air floatation treatment system - Google Patents
Vortex air floatation treatment system Download PDFInfo
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- CN112759140B CN112759140B CN202110054480.XA CN202110054480A CN112759140B CN 112759140 B CN112759140 B CN 112759140B CN 202110054480 A CN202110054480 A CN 202110054480A CN 112759140 B CN112759140 B CN 112759140B
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- 239000010865 sewage Substances 0.000 claims abstract description 36
- 239000002351 wastewater Substances 0.000 claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 40
- 238000005188 flotation Methods 0.000 claims description 21
- 239000007788 liquid Substances 0.000 claims description 13
- 238000012545 processing Methods 0.000 claims description 7
- 238000007790 scraping Methods 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 4
- 239000002893 slag Substances 0.000 claims description 2
- 238000004065 wastewater treatment Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 47
- 239000003814 drug Substances 0.000 description 16
- 239000012530 fluid Substances 0.000 description 8
- 230000009471 action Effects 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 239000008394 flocculating agent Substances 0.000 description 3
- 239000010802 sludge Substances 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006196 drop Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/80—Mixing plants; Combinations of mixers
- B01F33/81—Combinations of similar mixers, e.g. with rotary stirring devices in two or more receptacles
- B01F33/811—Combinations of similar mixers, e.g. with rotary stirring devices in two or more receptacles in two or more consecutive, i.e. successive, mixing receptacles or being consecutively arranged
-
- 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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (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)
- Physical Water Treatments (AREA)
Abstract
The invention relates to the technical field of oily wastewater treatment, in particular to an eddy air floatation treatment system, which comprises the following components: the device comprises a plurality of multiphase mixing devices, a wastewater tank, an oil discharge tank, an air compressor and a dosing device which are arranged in series. The invention uses low-intensity vortex field to strengthen the collision and adhesion of oil drops, flocs and bubbles. The relatively mild vortex field enables oil drops, flocs and bubbles to obtain proper collision energy, and avoids the influence of energy surplus on subsequent adhesion. In addition, the sewage in the weak vortex field has longer residence time, the bubbles are relaxed, and the oil drops can be fully floated.
Description
Technical Field
The invention relates to the technical field of oily wastewater treatment, in particular to an eddy air floatation treatment system.
Background
Along with the oil exploitation of each oil field entering the middle and later stages, the oil-containing water amount continuously rises, even the water content of crude oil of partial blocks reaches more than 90%, and the water extracted from 5X 10 8m3 a year of China needs to be treated. If a large amount of untreated or unqualified oily sewage is discharged, the natural environment is seriously polluted and water resource waste is caused. The best solution is therefore to reinject the produced water after it has been treated to be acceptable. For offshore oil fields, the existing oil-water separation process can only be optimized and modified due to narrow space and limited bearing capacity.
Disclosure of Invention
The invention aims at solving the problem that the conventional treatment facilities are difficult to meet the treatment requirements of a large amount of produced water in an oil field, optimizing and modifying the conventional treatment process, combining the cyclone separation process and the air floatation process, and forming a novel compact and efficient vortex air floatation treatment system. The compact vortex air floatation is to strengthen the collision and adhesion of oil drops, flocs and bubbles by using a low-strength vortex field. The relatively mild vortex field enables oil drops, flocs and bubbles to obtain proper collision energy, and avoids the influence of energy surplus on subsequent adhesion. In addition, the sewage in the weak vortex field has longer residence time, the bubbles are relaxed, and the oil drops can be fully floated.
The technical scheme provided by the invention is as follows:
an eddy current air flotation treatment system comprising:
The multi-phase mixing devices are arranged in series, each multi-phase mixing device is provided with an air charging port, a feed port and a bottom flow port, and the bottom flow port of each multi-phase mixing device at the upper stage is communicated with the feed port of the corresponding multi-phase mixing device at the lower stage;
the wastewater tank is communicated with a feed inlet of the multiphase mixing device of the first stage through a sewage pipeline, and the sewage pipeline is provided with a high-pressure pump;
the oil discharge pool is communicated with a bottom flow port of the multiphase mixing device at the last stage;
an air compressor communicated with the air charging ports of the multiphase mixing devices;
And the dosing device is communicated with the sewage pipeline, and the communication part is positioned between the high-pressure pump and the feed inlet of the multiphase mixing device of the first stage.
The upper stage and the lower stage refer to the front-back sequence of a plurality of multiphase mixing devices arranged in series.
Based on the technical scheme, the wastewater tank is connected with the feed inlet of the multiphase mixing device, oily wastewater is pumped out from the wastewater tank through the high-pressure pump and is conveyed to the multiphase mixing device along the pipeline, a pipeline close to the feed inlet of the multiphase mixing device is connected with a dosing device, the dosing device adds floccule medicament into the wastewater through the dosing port opened on the pipeline, an air compressor is connected with the air charging port of the multiphase mixing device, gas enters the barrel of the multiphase mixing device from the air charging port above the multiphase mixing device, the multistage multiphase mixing devices are connected in series, and multiphase mixed floccules are discharged to the oil discharge tank from the bottom flow port of the multiphase mixing device of the last stage. The multistage serial mixer has the advantages of long hydraulic retention time, long contact time of oil drops, flocs and bubbles, high collision adhesion probability of three-phase particles and the like, and the multistage serial mode is adopted to improve the separation efficiency of mixed sewage.
Further, the wastewater tank is provided with a liquid level meter; the sewer line is provided with a flow meter, which is located between the wastewater tank and the high pressure pump.
Based on the technical scheme, the flowmeter can be used for measuring the sewage flow pumped out of the wastewater tank by the high-pressure water pump, and the liquid level meter can be arranged for monitoring the height of the liquid level of the wastewater tank in real time.
Further, the dosing device comprises a dosing tank, a stirrer arranged in the dosing tank and a water pump, wherein an inlet and an outlet of the water pump are respectively communicated with the dosing tank and the sewage pipeline through pipelines.
Based on the technical scheme, the floccule medicament gradually changes into a long line from an initial coiled shape under the stirring of the stirrer, the capability of capturing suspended particles in sewage by the floccule medicament is improved, the floccule medicament is pumped out by a water pump after being stirred for a period of time, and is mixed with the oily sewage through a dosing port.
Specifically, the oil discharge pond includes the air supporting groove and right the sediment machine of scraping of air supporting groove upper portion floc is scraped, the bottom plate of air supporting groove is domatic structure, and its middle part is provided with the delivery port, and its bottom is provided with the oil drain port, with the lateral wall of air supporting groove that the higher one end of bottom plate links to each other is provided with the water inlet, the water inlet intercommunication last level the underflow mouth of multiphase mixing arrangement.
Based on the technical scheme, the bottom plate is obliquely arranged, so that the purpose of preventing oil residues from blocking the water outlet is achieved, or part of oil residues can be prevented from being discharged through the water outlet, the residue scraping machine is arranged at the upper end of the air floatation tank, the floating flocs are scraped through the scraper, the bottom plate bottom is provided with the oil drain port, the oil residues deposited to the bottom of the tank are pumped away through the oil drain port, the water outlet is arranged in the middle of the bottom plate, and treated sewage is discharged from the water drain port.
Further, valves are respectively arranged in front of the air compressor and each charging port.
Based on the technical scheme, the position of inflation and the number of inflation inlets for inflation can be adjusted.
Specifically, the multiphase mixing device includes:
The upper end of the cylindrical mixer barrel body is provided with the charging port, and the lower end of the cylindrical mixer barrel body is provided with the bottom flow port;
a plurality of split-flow straight branch pipes uniformly arranged at intervals around the circumference of the mixer barrel, wherein each split-flow straight branch pipe is vertically arranged and fixed on the outer surface of the mixer barrel, and the lower end of each split-flow straight branch pipe is provided with an end cover which can be opened or closed;
a split ring pipe circumferentially fixed to the outer surface of the upper part of the mixer cylinder, the split ring pipe being respectively connected to the upper ends of the split straight branch pipes, the split ring pipe having the feed inlet;
The vortex pipelines are arranged at the periphery of the mixer barrel along the tangential direction of the mixer barrel, one end of each vortex pipeline is communicated with the mixer barrel, the other end of each vortex pipeline is communicated with one flow-dividing straight branch pipe, and each flow-dividing straight branch pipe is communicated with the mixer barrel through a plurality of vortex pipelines.
Based on the technical scheme, in the multiphase mixing device, oil-water mixed fluid flows through a split-flow annular pipeline and a split-flow straight branch pipe through a feed inlet, is conveyed to a vortex pipeline, enters the mixer barrel tangentially from the vortex pipeline at a certain inlet speed to form a vortex centrifugal flow field, compressed air entering from an air charging port at the upper end of the mixer barrel forms microbubbles under the action of the flow field, forms floccules with medicament molecules and oil drops, and is finally discharged from a bottom flow port at the lower end of the mixer barrel. Therefore, the efficient mixing of the oil, the air bubbles, the liquid and the floc can be realized by utilizing a mode of combining the rotational flow and the air flotation, and the mixing of the oil, the air bubbles, the liquid and the floc can be obtained.
Specifically, the vortex pipeline includes:
A first connecting pipe section, one end of which is communicated with the mixer barrel, and one side edge of which, away from the axis of the mixer barrel, extends along a tangent line of the outer surface of the mixer barrel;
one end of the second connecting pipe section is communicated with the split straight branch pipe;
And a hose that communicates the other end of the first connecting pipe section and the other end of the second connecting pipe section.
Based on the technical scheme, in the multiphase mixing device, the oil-water mixed fluid can tangentially enter the mixer barrel at a certain inlet speed to form an eddy centrifugal flow field. And the hose is convenient for setting a switch.
Specifically, the hose is provided with a switch.
Based on the technical scheme, in the multiphase mixing device, the switch device is arranged on the hose, the opening and closing of each vortex pipeline can be controlled, the total circulation area of the vortex pipelines is changed by controlling the quantity of the fluid circulation vortex pipelines, and then the fluid jet flow speed is regulated, so that the strength of the rotational flow field is regulated.
Specifically, the diameter of the vortex pipeline is 6-10mm, the first connecting pipe section can be welded on the mixer barrel, the first connecting pipe section can be welded on the split straight branch pipe, and the two parts are connected through a hose.
Specifically, the inflation inlet is communicated with a three-way pipe, and the three-way pipe is also respectively communicated with a pressure gauge and the air compressor.
Based on the technical scheme, the pressure of the compressed air introduced into the mixing device can be adjusted, and the pressure of the compressed air introduced into the mixing device is changed between 0.2 and 1.2 Mpa.
Specifically, the inflation inlet is provided with a connecting flange, and the inflation inlet is communicated with the three-way pipe through the connecting flange.
Based on the technical scheme, the inflation inlet and the three-way pipe can be conveniently and stably communicated.
Specifically, the bottom flow port is provided with a connecting flange.
Based on the technical scheme, the bottom flow port is convenient to be further communicated with the output pipeline.
Specifically, the feed inlet is provided with flange.
Based on the technical scheme, the oil-containing sewage inlet pipe and the feeding port are conveniently and stably communicated.
Specifically, a plurality of rows of vortex pipelines are uniformly arranged on the outer surface of the mixer barrel around the circumferential direction, and the vortex pipelines in each row are vertically arranged on the same side of the corresponding split straight branch pipe.
Specifically, the lengths and diameters of the split straight branch pipes are the same, the upper ends of the split straight branch pipes are flush, and the lower ends of the split straight branch pipes are flush.
Specifically, the cylinder body is a long cylinder with the same diameter, 4-8 vortex pipelines are uniformly arranged on the cylinder in the circumferential direction, and 10-16 vortex pipelines are uniformly arranged in the axial direction.
Based on the technical scheme, in the multiphase mixing device, the floccule medicament is added into the cylinder, and compressed air is introduced, so that oil drops, water, floccule medicament and microbubbles in the oily sewage can generate multiphase mixed floccules in the rotational flow field, and the oily content of the oily sewage can be obviously reduced after the multiphase mixed floccules are treated by the multiphase mixer of oil, gas, liquid and floccules.
Drawings
Fig. 1 is a schematic front view of a multiphase mixing device in an eddy air flotation treatment system according to the present invention.
Fig. 2 is a schematic top view of a multiphase mixing device in an eddy current air flotation treatment system according to the present invention.
Fig. 3 is a schematic view of a partial structure of a vortex tube of a multiphase mixing device in a vortex air flotation processing system provided by the invention.
Fig. 4 is a perspective view of a multiphase mixing device in an eddy current air flotation treatment system provided by the invention.
Fig. 5 is a system diagram of an eddy current air flotation treatment system provided by the invention.
In fig. 1,2, 3, 4 and 5, the structures represented by the respective reference numerals are listed below:
1. the mixer comprises a bottom flow port, a mixer barrel, a vortex pipeline, a first connecting pipe section, a second connecting pipe section, a hose, a switch, a split straight branch pipe, a split annular pipeline, a feed port, a vortex pipeline, a pressure meter and a pressure meter, wherein the bottom flow port, the mixer barrel, the vortex pipeline, the first connecting pipe section, the second connecting pipe section, the hose, the switch, the split straight branch pipe, the split annular pipeline, the feed port, the vortex pipeline, the first connecting pipe section, the hose, the second connecting pipe section, the hose and the pressure meter;
11. The device comprises a wastewater tank, 12, a dosing device, 13, a multiphase mixing device, 14, an oil discharge tank, 15 and an air compressor.
Detailed Description
The principles and features of the present invention are described below with examples only to illustrate the present invention and not to limit the scope of the present invention.
It is noted that when an element or component is referred to as being "connected," "positioned," "assembled" to another element or component, it can be directly on the other element or component or intervening elements and components may also be present. The terms "left", "right", "upper", "lower" and the like are used herein for illustrative purposes only.
In one embodiment, as shown in fig. 1,2, 3, 4, the multiphase mixing device 13) comprises: a cylindrical mixer cylinder 2 arranged vertically), the upper end of which is provided with the charging port 7), and the lower end of which is provided with the bottom flow port 1; a plurality of split straight branch pipes 4 uniformly and alternately arranged around the circumference of the mixer barrel 2, wherein each split straight branch pipe 4 is vertically arranged and fixed on the outer surface of the mixer barrel 2, and the lower end of each split straight branch pipe 4 is provided with an end cover which can be opened or closed; a split annular pipe 5 circumferentially fixed on the upper outer surface of the mixer drum 2, the split annular pipe 5 being respectively communicated with the upper ends of the split straight branch pipes 4, the split annular pipe 5 having a feed inlet 6; the vortex pipes 3 are arranged at the periphery of the mixer cylinder 2 along the tangential direction of the mixer cylinder 2, one end of each vortex pipe 3 is communicated with the mixer cylinder 2, the other end is communicated with one split straight branch pipe 4, and each split straight branch pipe 4 is communicated with the mixer cylinder 2 through the vortex pipes 3. Based on the technical scheme, in the multiphase mixing device, oil-water mixed fluid flows through a split annular pipeline and a split straight branch pipe through a feed inlet, is conveyed to a vortex pipeline, enters the mixer barrel tangentially from the vortex pipeline at a certain inlet speed to form a vortex centrifugal flow field, compressed air entering from an air charging port at the upper end of the mixer barrel forms microbubbles under the action of the flow field, forms multiphase mixed flocs with flocs medicament and oil drops, and is finally discharged from a bottom flow port at the lower end of the mixer barrel. Therefore, the efficient mixing of the oil, the air bubbles, the liquid and the flocs can be realized by utilizing a mode of combining the rotational flow and the air flotation, and the multiphase mixed flocs of the oil, the air bubbles, the liquid and the flocs can be obtained.
In one embodiment, as shown in fig. 2 and 3, the swirl tube 3 includes: a first connection pipe section 301, a side edge of the first connection pipe section 301 away from the axis of the mixer drum 2 extending along a tangent line of the outer surface of the mixer drum 2; a second connecting pipe section 302, the second connecting pipe section 302 being communicated with the split straight branch pipe 4; and a hose 303 connecting the first connection pipe section 301 and the second connection pipe section 302. Based on the technical scheme, in the multiphase mixing device, the oil-water mixed fluid can enter the mixer barrel tangentially at a certain inlet speed to form an eddy centrifugal flow field. And the hose is convenient for setting a switch.
In one embodiment, as shown in fig. 2 and 3, the hose 303 is provided with a switch 304. Specifically, the switch 304 may be a water clamp. Based on the multiphase mixing device provided by the technical scheme, the hose is provided with the switch device, the opening and closing of each vortex pipeline can be controlled, the total circulation area of the vortex pipelines is changed by controlling the quantity of the fluid circulation vortex pipelines, and the fluid jet flow speed is further regulated, so that the strength of the rotational flow field is regulated. Moreover, the two sections of pipelines are connected through the hose, so that the hose is easy to detach. The pipe orifice at the lower end of the split straight branch pipe can be opened and closed, and the cleaning easiness of the mixing device is also enhanced.
In one embodiment, as shown in fig. 1, the charging port 7 is connected to a tee pipe, and the tee pipe is also connected to a pressure gauge 8 and an air compressor 15 respectively. Based on the technical proposal, the pressure of the compressed air which is introduced into the mixing device can be adjusted, and the pressure of the compressed air which is introduced changes from 0.2 Mpa to 1.2 Mpa.
In one embodiment, as shown in fig. 1, the charging port 7 is provided with a connecting flange, and the charging port 7 is communicated with the tee pipe through the connecting flange. Based on this technical scheme, can be convenient and stable with inflation inlet and three-way pipe intercommunication setting.
In one embodiment, as in fig. 1, the bottom opening 1 is provided with a connecting flange. Based on this technical scheme, the further intercommunication setting with the output pipeline of underflow opening of being convenient for.
In one embodiment, the feed opening 6 is provided with a connecting flange as in fig. 1. Based on this technical scheme, can be convenient and stable with oily sewage advance pipe and feed inlet intercommunication setting.
In one embodiment, 6 straight branch pipes 4 are uniformly arranged on the outer surface of the mixer barrel 2 at intervals around the circumferential direction, each straight branch pipe 4 is communicated with the mixer barrel 2 through 16 vortex pipelines 3, the lengths of the straight branch pipes 4 are identical, the diameters of the straight branch pipes 4 are equal, the upper ends of the straight branch pipes 4 are flush, and the lower ends of the straight branch pipes 4 are flush. The 16 swirl tubes 3 are arranged on the same side thereof in the axial direction of the branch straight pipe 4. The diameter of the split annular pipeline 5 is 30mm, and the diameter of the split straight branch pipe 4 is 25mm.
Based on the multiphase mixing device, the floccule medicament is added into the cylinder, and compressed air is introduced, so that oil drops, water, medicament molecules and microbubbles in the oily sewage can generate multiphase mixed floccules in the rotational flow field, and the oily content of the oily sewage can be obviously reduced after the multiphase mixed floccules are treated by the multiphase mixer of the oil, gas, liquid and floccules.
In one embodiment, as shown in FIG. 5, an eddy current air flotation treatment system includes: the multiphase mixing devices 13 are arranged in series, each multiphase mixing device 13 is provided with an air charging port 7, a feed port 6 and a bottom flow port 1, and the bottom flow port 1 of each multiphase mixing device 13 at the previous stage is communicated with the feed port 6 of the multiphase mixing device 13 at the corresponding next stage; the wastewater tank 11, the wastewater tank 11 is communicated with the feed inlet 6 of the multiphase mixing device 13 of the first stage through a sewage pipeline, and the sewage pipeline is provided with a high-pressure pump; an oil discharge tank 14, wherein the oil discharge tank 14 is communicated with the bottom flow port 1 of the multiphase mixing device 13 of the last stage; an air compressor 15 connected to the air charging port 7 of each multiphase mixing device 13; and a dosing device 12 which communicates with the sewer line between the high pressure pump and the feed inlet 6 of the multiphase mixing device 13 of the first stage. Based on this technical scheme, the wastewater tank links to each other with multiphase mixing device's feed inlet, oily sewage is taken out from the wastewater tank through the high-pressure pump and is carried multiphase mixing device along the pipeline, the pipeline connection that is close to multiphase mixing device's feed inlet has the dosing device, dosing device adds the floc medicament to sewage through the dosing port that opens on the pipeline, air compressor links to each other with multiphase mixing device's inflation inlet, gas gets into multiphase mixing device barrel from multiphase mixing device top's inflation inlet, multistage multiphase mixing device is established ties, multiphase mixing floc is discharged to the oil extraction pond from last level multiphase mixing device's underflow mouth. The multistage serial mixer has the advantages of long hydraulic retention time, long contact time of oil drops, flocs and bubbles, high collision adhesion probability of three-phase particles and the like, and the multistage serial mode is adopted to improve the separation efficiency of mixed sewage.
In one embodiment, the wastewater tank 11 is provided with a level gauge; the sewer line is provided with a flow meter, which is located between the wastewater tank 11 and the high pressure pump. Based on the technical scheme, the flowmeter can be used for measuring the sewage flow pumped by the high-pressure water pump from the wastewater tank, and the liquid level meter can be arranged for monitoring the height of the liquid level of the wastewater tank in real time.
In one embodiment, as shown in FIG. 5, the dosing device 12 includes a dosing tank, a blender disposed within the dosing tank, and a water pump, with an inlet and an outlet of the water pump being in communication with the dosing tank and the sewer line, respectively, through tubing. Based on the technical scheme, the floccule medicament gradually changes into a long line from an initial coiled shape under the stirring of the stirrer, the capability of capturing suspended particles in sewage by the floccule medicament is improved, the floccule medicament is pumped out by a water pump after being stirred for a period of time, and is mixed with the oily sewage through a dosing port.
In one embodiment, the oil drain tank 14 comprises an air flotation tank and a slag scraping machine for scraping the flocs on the upper part of the air flotation tank, the bottom plate of the air flotation tank is of a slope structure, the middle part of the air flotation tank is provided with a water outlet, the bottom of the air flotation tank is provided with an oil drain port, and the side wall of the air flotation tank connected with the higher end of the bottom plate is provided with a water inlet which is communicated with the bottom flow port 1 of the multiphase mixing device 13 of the last stage. Based on this technical scheme, the bottom plate slope sets up, and the purpose is to prevent that the oil sludge from blockking up the delivery port, perhaps prevents that some oil sludge from being discharged through the delivery port, scrapes the sediment machine and installs in the air supporting groove upper end, scrapes the floc of come-up through the scraper, and the bottom plate bottom sets up the oil drain port, and the oil sludge that deposits to the bottom of the pool is taken away through the oil drain port, and the bottom plate middle part is provided with the delivery port, and the sewage after the processing is discharged from this.
In one embodiment, valves are provided before the air compressor 15 and each of the charging openings 7, respectively. Based on this technical scheme, the position of inflation and the quantity of inflation inlet that aerifys can be adjusted.
Based on the vortex air-float treatment system provided by the invention, sewage in the wastewater tank 11 enters the mixer cylinder 2 from the feed inlet 6 of the multiphase mixing device 13 through the sewage pipeline by the pressurization of the high-pressure water pump. The medicament enters the sewage pipeline through a medicament adding port formed in the sewage pipeline and is mixed with the oily sewage to enter the interior of the mixer barrel 2, and the air compressor 15 inputs compressed air into the mixer barrel 2 from the charging port 7. The compressed air is dissolved in water to form large bubbles, shearing and crushing are carried out under the action of a flow field to form micro bubbles, oil drops in the cylinder, water, the micro bubbles and the flocculating agent are mixed under the action of a rotational flow field to generate multiphase mixed flocculating agent, and then the multiphase mixed flocculating agent is discharged to the next stage from the bottom flow port 1. Because the multiphase mixing device 13 is in multistage series connection, compared with a single-stage multiphase mixer, the mixing efficiency of oil drops, water, microbubbles and floccules is greatly improved, and multiphase mixed floccules are directly discharged into the oil discharge tank 14 after passing through the last-stage multiphase mixing device 13. Due to the reduction of pressure, microbubbles in the flocs grow up and squeeze out water in the flocs, the flocs float upwards due to the reduction of density, finally, the flocs are scraped by a scraper on the liquid level, oil residues are deposited downwards to the bottom of the tank and pumped away through an oil drain port at the bottom, and treated sewage is discharged through a drain port at the side surface of the oil drain tank.
The foregoing is only illustrative of the present invention and is not to be construed as limiting thereof, but rather as various modifications, equivalent arrangements, improvements, etc., within the spirit and principles of the present invention.
Claims (6)
1. An eddy current air flotation treatment system, comprising:
The multi-phase mixing device comprises a plurality of multi-phase mixing devices (13) which are sequentially connected in series, wherein each multi-phase mixing device (13) is provided with an air charging port (7), a feed port (6) and a bottom flow port (1), and the bottom flow port (1) of each multi-phase mixing device (13) at the upper stage is communicated with the feed port (6) of the corresponding multi-phase mixing device (13) at the lower stage;
the wastewater tank (11) is communicated with a feed inlet (6) of the multiphase mixing device (13) of the first stage through a sewage pipeline, and the sewage pipeline is provided with a high-pressure pump;
an oil drain tank (14), wherein the oil drain tank (14) is communicated with a bottom flow port (1) of the multiphase mixing device (13) at the last stage;
an air compressor (15) communicated with the air charging ports (7) of the multiphase mixing devices (13);
and a dosing device (12) communicating with the sewer line, the communication being located between the high pressure pump and the feed inlet (6) of the multiphase mixing device (13) of the first stage;
The multiphase mixing device (13) comprises: the upper end of the cylindrical mixer barrel (2) is provided with the air charging port (7), and the lower end of the cylindrical mixer barrel is provided with the bottom flow port (1);
A plurality of split straight branch pipes (4) which are uniformly arranged at intervals around the circumference of the mixer barrel (2), wherein each split straight branch pipe (4) is vertically arranged and fixed on the outer surface of the mixer barrel (2), and the lower end of each split straight branch pipe (4) is provided with an end cover which can be opened or closed;
A split-flow annular pipeline (5) circumferentially fixed on the upper outer surface of the mixer barrel (2), wherein the split-flow annular pipeline (5) is respectively communicated with the upper ends of the split-flow straight branch pipes (4), and the split-flow annular pipeline (5) is provided with the feed inlet (6);
A plurality of vortex pipes (3), wherein each vortex pipe (3) is arranged at the periphery of the mixer cylinder (2) along the tangential direction of the mixer cylinder (2), one end of each vortex pipe is communicated with the mixer cylinder (2), the other end of each vortex pipe is communicated with a corresponding split straight branch pipe (4), and each split straight branch pipe (4) is communicated with the mixer cylinder (2) through the corresponding vortex pipe (3);
The swirl tube (3) comprises: -a first connection pipe section (301), a side edge of the first connection pipe section (301) remote from the axis of the mixer drum (2) extending along a tangent to the outer surface of the mixer drum (2);
a second connecting pipe section (302), the second connecting pipe section (302) being in communication with the split straight branch pipe (4);
And a hose (303) communicating the first connection pipe section (301) and the second connection pipe section (302), the hose (303) being provided with a switch (304);
The oil drain tank (14) comprises an air flotation tank and a slag scraping machine for scraping flocs on the upper portion of the air flotation tank, a bottom plate of the air flotation tank is of a slope structure, a water outlet is formed in the middle of the bottom plate, an oil drain port is formed in the bottom of the bottom plate, a water inlet is formed in the side wall of the air flotation tank, the side wall of the air flotation tank is connected with the higher end of the bottom plate, and the water inlet is communicated with a bottom flow port (1) of the multiphase mixing device (13) of the last stage.
2. The vortex air bearing processing system of claim 1 wherein: the wastewater tank (11) is provided with a liquid level meter; the sewer line is provided with a flow meter, which is located between the wastewater tank (11) and the high pressure pump.
3. The vortex air bearing processing system of claim 1 wherein: the dosing device (12) comprises a water pump, a dosing tank and a stirrer arranged in the dosing tank, wherein an inlet and an outlet of the water pump are respectively communicated with the dosing tank and the sewage pipeline through pipelines.
4. The vortex air bearing processing system of claim 1 wherein: valves are respectively arranged in front of the air compressor (15) and each charging port (7).
5. The vortex air bearing processing system of claim 1 wherein: the air charging port (7) is communicated with a three-way pipe, and the three-way pipe is also respectively communicated with a pressure gauge (8) and the air compressor (15).
6. The vortex air bearing processing system of claim 5 wherein: the air charging port (7) is provided with a connecting flange, and the air charging port (7) is communicated with the three-way pipe through the connecting flange; the bottom flow port (1) is provided with a connecting flange; the feed inlet (6) is provided with a connecting flange.
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|---|---|---|---|---|
| CN206580590U (en) * | 2017-03-14 | 2017-10-24 | 河南大禹水处理有限公司 | A kind of whirlpool can multiphase flash dissolving device |
| CN110204085A (en) * | 2019-05-20 | 2019-09-06 | 武汉工程大学 | A kind of multiple coil air-float degreasing device and its application |
| CN110240215A (en) * | 2019-06-24 | 2019-09-17 | 武汉工程大学 | A kind of vortex three-phase mixer |
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| US20110147302A1 (en) * | 2005-02-18 | 2011-06-23 | Conder Products Limited | Oil/Water Separator |
| NO329085B1 (en) * | 2008-01-31 | 2010-08-16 | Sorbwater Technology As | Process and apparatus for separating fluid phases, and their applications |
| EP2421655B1 (en) * | 2009-04-20 | 2019-02-13 | Sorbwater Technology As | Apparatus and method for separation of phases in a multiphase flow |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206580590U (en) * | 2017-03-14 | 2017-10-24 | 河南大禹水处理有限公司 | A kind of whirlpool can multiphase flash dissolving device |
| CN110204085A (en) * | 2019-05-20 | 2019-09-06 | 武汉工程大学 | A kind of multiple coil air-float degreasing device and its application |
| CN110240215A (en) * | 2019-06-24 | 2019-09-17 | 武汉工程大学 | A kind of vortex three-phase mixer |
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