CN116924516A - Air-float separation device for oil sewage - Google Patents

Air-float separation device for oil sewage Download PDF

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Publication number
CN116924516A
CN116924516A CN202311196221.6A CN202311196221A CN116924516A CN 116924516 A CN116924516 A CN 116924516A CN 202311196221 A CN202311196221 A CN 202311196221A CN 116924516 A CN116924516 A CN 116924516A
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water
tank
separation
air
separating
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CN202311196221.6A
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CN116924516B (en
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李能立
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Shanxi San Fran Environmental Protection Technology Co ltd
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Shanxi San Fran Environmental Protection Technology Co ltd
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/40Devices for separating or removing fatty or oily substances or similar floating material
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/24Treatment of water, waste water, or sewage by flotation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/28Treatment of water, waste water, or sewage by sorption
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00Specific treatment goals
    • C02F2303/14Maintenance of water treatment installations
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00Specific treatment goals
    • C02F2303/16Regeneration of sorbents, filters

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  • 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)
  • Analytical Chemistry (AREA)
  • Physical Water Treatments (AREA)

Abstract

The application relates to an air floatation separation device for oil sewage, which mainly relates to the technical field of oil-water separation equipment, and comprises a separation mechanism and an air floatation mechanism communicated with the separation mechanism; the separating mechanism comprises a separating tank, a driving rod vertically penetrating through the separating tank along the axial direction, a separating filter screen sleeved on the driving rod and attached to the inner wall of the separating tank, and a driving motor arranged at the top of the separating tank, wherein the driving motor is in transmission connection with the driving rod; the top and the bottom of the separation tank are respectively connected with a water inlet pipe and a water outlet pipe, and the water outlet pipe is communicated with the air floatation mechanism. The application has the advantages of high treatment speed, thorough separation effect and high purity of the separated products.

Description

Air-float separation device for oil sewage
Technical Field
The application relates to the technical field of oil-water separation equipment, in particular to an air floatation separation device for oil sewage.
Background
The oil-water separation technology refers to a technology for separating water and oil by utilizing differences in physical properties between water and oil. The water-oil separation can be classified into centrifugal separation, electric separation, adsorption separation, air-float separation, and the like according to the separation principle. The air flotation separation is a common separation mode in industry, and has wide application in petrochemical industry.
The principle of air flotation separation is that a large amount of micro bubbles are introduced into or managed to be generated in the oil-water mixture, the bubbles are attached to tiny oil drops in the mixture, foam-shaped oil residues with density smaller than that of water are formed by combining the bubbles, and then the bubbles float to the water surface, so that the oil-water separation is finally realized. The method is popularized due to low use cost and large treatment capacity in unit time. However, this separation method can only treat a mixture having a low degree of oil-water mixing, and has a poor separation effect on an emulsified oil-water mixture having a high degree of mixing. Since the oil drop particles of the emulsified oil are small, and are wrapped by the emulsifier to form a relatively stable film. The film prevents the mutual fusion of the oil drops, so that the oil drops are difficult to combine with bubbles to form oil residues. Therefore, the emulsified oil hydrate is generally electrically separated with high use cost, so as to obtain better separation effect.
Aiming at the related technology, an air floatation separation method is used for separating the emulsified oil-water mixture with higher mixing degree, and the defects of poor separation effect and higher residual content of separation products exist.
Disclosure of Invention
In order to improve the separation effect of an oil-water mixture, improve the purity of a separation product and reduce the use cost, the application provides an air floatation separation device for oil sewage.
The application provides an air floatation separation device for oil sewage, which adopts the following technical scheme:
an air floatation separation device for oil sewage comprises a separation mechanism and an air floatation mechanism communicated with the separation mechanism; the separating mechanism comprises a separating tank, a driving rod vertically penetrating through the separating tank along the axial direction, a separating filter screen sleeved on the driving rod and attached to the inner wall of the separating tank, and a driving motor arranged at the top of the separating tank, wherein the driving motor is in transmission connection with the driving rod; the top and the bottom of the separation tank are respectively connected with a water inlet pipe and a water outlet pipe, and the water outlet pipe is communicated with the air floatation mechanism.
Through adopting above-mentioned technical scheme, separating mechanism can carry out preliminary separation processing to the oil-water mixture, the filterable mode separation of standing is passed through with a large amount of oil in the mixture, the quantity of the oil that needs to carry out the separation of air supporting mechanism has been showing to reduce, air supporting mechanism can carry out further air supporting separation to the oil-water mixture through separating mechanism preliminary treatment, thereby obtain the higher separation product of purity, the separator tank is as the container of the preliminary separation of oil-water mixture, the installation to the actuating lever provides support and spacing, the actuating lever can drive the separation filter screen along the axis direction ascending under actuating motor's effect, the separation filter screen of oleophilic material can accelerate the separation of oil reservoir and water layer through the adsorption, separation efficiency and separation effect have been improved, the outlet pipe can be sent into the air supporting mechanism with the oil-water mixture that is through the preliminary treatment and carry out further separation, the separation effect has been realized improving the separation product purity and the reduction use cost's of purity.
Optionally, the actuating lever includes wears to establish perpendicularly along the axis direction sleeve pipe and two symmetries on the knockout drum wear to establish the intraductal threaded rod of sleeve pipe, two kidney-shaped holes have been seted up along length direction symmetry to the sheathed tube lateral wall, the threaded rod with sleeve pipe is along perpendicular to axis direction sliding connection, the screw thread section joint of threaded rod is in kidney-shaped hole, and with the separation filter screen screw thread cooperation.
Through adopting above-mentioned technical scheme, sliding fit's structural design between sleeve pipe and the threaded rod that the actuating lever adopted for the cover is established the separation filter screen on the actuating lever and can be risen under the rotation effect of actuating lever, makes the separation filter screen can take the oil in the mixture to remove and assemble the fusion to the top of knockout drum, withdraws from telescopic kidney-shaped hole structure when the threaded rod, and the separation filter screen breaks away from the meshing with the actuating lever and drops to the bottom of knockout drum under the effect of dead weight, and the reaction force that drops the process and produce can wash away the remaining oil on the separation filter screen, thereby has guaranteed that the separation effect of separation filter screen can not drop along with the extension of time.
Alternatively, the separation screen is distributed along the conical surface shape with the opening upward.
Through adopting above-mentioned technical scheme, the structural design of separation filter screen can increase effective area of contact, reduces the oil and disperses Fang Yi downwards, improves separation effect.
Optionally, the air floatation mechanism comprises a water tank communicated with the water outlet pipe, an air floatation filter screen arranged in the water tank along the horizontal direction, a pressurizing assembly arranged at one side of the water tank and a scraping assembly arranged at the top of the water tank; the air-float filter screen is connected with the water tank in a sliding manner along the direction vertical to the ground.
Through adopting above-mentioned technical scheme, the water tank is the container that carries out further oil water separation operation, the installation to the air supporting filter screen provides support and spacing, the air supporting filter screen can assemble big oil droplet with the oil droplet, thereby combine to generate the less foamy oil residue of density with the bubble, the pressurization subassembly can impress the air in the clear water, and will impress the clear water conservancy diversion of air and release respectively to the water tank bottom, can produce a large amount of bubbles after the clear water decompression of excessive air has been dissolved, thereby realize the air supporting deoiling function, strike off the subassembly and can strike off the foamy oil residue that the water tank top assembled from the surface of water.
Optionally, a drain pipe is arranged on one side of the water tank, which is close to the separating mechanism, and the drain pipe and the water outlet pipe are mutually attached and spirally wound.
Through adopting above-mentioned technical scheme, the drain pipe is arranged in discharging the water tank and removes the purified water of oil through the air supporting, and the structure that drain pipe and outlet pipe laminate each other can make between outlet pipe and the drain pipe can carry out the heat exchange to the temperature of the oily water mixture in the entering water tank has been reduced, is favorable to further promotion of water oil separating efficiency.
Optionally, the scraping assembly comprises a chain plate conveyor belt arranged at the top of the water tank and a plurality of scraping plates obliquely clamped on the chain plate of the chain plate conveyor belt.
Through adopting above-mentioned technical scheme, the scraper blade of slope joint can be under the drive of link joint conveyer belt with the foam form oil residue on the surface of water striking off.
Optionally, the pressurizing assembly comprises a pressure tank fixedly arranged at one side of the water tank, an air compressor arranged at one side of the pressure tank, a shunt pipe with one end communicated with the bottom of the pressure tank and a pressure reducing valve arranged on the shunt pipe; the other end of the shunt tube is communicated with the bottom of the water tank.
Through adopting above-mentioned technical scheme, the compressed air that produces in the overhead tank can be with the air compressor machine in the dissolved entering water, the shunt tubes can be with the water purification reposition of redundant personnel of dissolving excessive air bottom the water tank of discharging to produce a large amount of bubbles.
Optionally, the air-float filter screen comprises a limit frame in sliding connection with the water tank and a plurality of layers of foam nickel screens which are mutually parallel and arranged in the limit frame.
Through adopting above-mentioned technical scheme, the spacing frame in the air supporting filter screen has played the supporting role to the foam nickel net, and spacing frame and water tank sliding connection's structure makes the foam nickel net take place to slide along the direction on perpendicular ground to drive the oil residue motion to the surface of water.
Optionally, the upper surface symmetry of spacing frame is provided with a pair of lug.
Through adopting above-mentioned technical scheme, the lug structure that limit frame upper surface symmetry set up can conveniently connect hoist engine or hoisting equipment.
Optionally, a cushion block is arranged between the foam nickel screens.
Through adopting above-mentioned technical scheme, the cushion between the foam nickel screen can enough increase the effective area of contact of foam nickel screen, improves deoiling efficiency, can make the middle slit that forms one deck to be used for storing the oil content of foam nickel screen again, has improved the separation effect.
In summary, the present application includes at least one of the following beneficial technical effects:
the separation mechanism can perform primary separation treatment on the oil-water mixture, a large amount of oil in the mixture is separated in a static filtering mode, the quantity of the oil which needs to be separated by the air floatation mechanism is obviously reduced, the air floatation mechanism can perform further air floatation separation on the oil-water mixture pretreated by the separation mechanism, so that a separation product with higher purity is obtained, the separation tank is used as a container for preliminary separation of the oil-water mixture, a support and a limit are provided for installation of the driving rod, the driving rod can drive the separation filter screen to rise along the axis direction under the action of the driving motor, the separation filter screen made of an oleophilic material can accelerate the separation of an oil layer and a water layer through adsorption, the separation efficiency and the separation effect are improved, the water outlet pipe can send the pretreated oil-water mixture into the air floatation mechanism for further separation, and the purposes of improving the purity of the separation product and reducing the use cost are achieved;
according to the application, due to the adoption of the structure design of sliding fit between the sleeve and the threaded rod, the separation filter screen sleeved on the drive rod can ascend under the rotation action of the drive rod, so that the separation filter screen can move towards the top of the separation tank with oil in the mixture and converge and merge, when the threaded rod is retracted from the kidney-shaped hole structure of the sleeve, the separation filter screen is disengaged from the drive rod and falls to the bottom of the separation tank under the action of self weight, and the reaction force generated in the falling process can wash the residual oil on the separation filter screen, so that the separation effect of the separation filter screen is ensured not to be reduced along with the time;
the water tank is a container for further oil-water separation operation, the air floatation filter screen is provided with support and limit, the separation filter screen can collect small oil drops into large oil drops, so that foam-shaped oil residues with smaller density can be generated by combining the small oil drops with bubbles, the pressurizing component can press air into clean water, the clean water pressed with the air is guided to the bottom of the water tank to be respectively released, a large number of bubbles can be generated after the clean water with excessive air dissolved is depressurized, the air floatation oil removal function is realized, and the scraping component can scrape the foam-shaped oil residues collected at the top of the water tank from the water surface.
Drawings
Fig. 1 is a schematic structural diagram of an air-float separation device for oily water according to an embodiment of the present application.
Fig. 2 is a schematic cross-sectional view of a separating mechanism according to an embodiment of the present application.
Fig. 3 is a schematic view of the structure of the driving rod in the embodiment of the present application.
Fig. 4 is a schematic structural diagram of an air-floating mechanism according to an embodiment of the present application.
Fig. 5 is a schematic structural diagram of an air-float filter according to an embodiment of the present application.
Fig. 6 is a schematic structural view of a pressurizing assembly according to an embodiment of the present application.
Fig. 7 is a schematic view of a scraping assembly according to an embodiment of the present application.
Reference numerals illustrate: 1. a separation mechanism; 11. a separation tank; 12. a driving rod; 13. separating a filter screen; 14. a driving motor; 111. a water inlet pipe; 112. a water outlet pipe; 121. a sleeve; 122. a threaded rod; 2. an air floatation mechanism; 21. a water tank; 22. an air-float filter screen; 23. a pressurizing assembly; 24. a scraping assembly; 211. a drain pipe; 221. a limit frame; 222. a foam nickel screen; 231. a pressure tank; 232. an air compressor; 233. a shunt; 234. a pressure reducing valve; 241. a link plate conveyor belt; 242. a scraper.
Detailed Description
The present application will be described in further detail with reference to fig. 1 to 7.
The embodiment of the application discloses an air floatation separation device for oily water. Referring to fig. 1, the air-float separation apparatus for oily water includes a separation mechanism 1 and an air-float mechanism 2. Wherein, separating mechanism 1 sets up in the one side of air supporting mechanism 2, and separating mechanism 1's bottom communicates with air supporting mechanism 2. The separation mechanism 1 can be used for carrying out preliminary separation on the oil-water mixture in a standing layering mode, and the air floatation mechanism 2 can be used for further separation on the oil-water mixture in an air floatation scraping mode.
Referring to fig. 1 and 2, the separation mechanism 1 includes a separation tank 11, a driving lever 12, a separation screen 13, and a driving motor 14. The separation tank 11 may be a cylindrical hollow metal tank body. The top of the separation tank 11 is provided with a water inlet pipe 111, and the bottom of the separation tank 11 is provided with a water outlet pipe 112. The oil-water mixture enters the separation tank 11 from the water inlet pipe 111, exits the separation tank 11 from the water outlet pipe 112 and enters the air flotation mechanism 2. A water pump is arranged on the pipeline of the water outlet pipe 112. The drive rod 12 is provided in the separator 11 so as to penetrate the separator 11 along the axial direction of the separator 11. The driving rod 12 is rotatably connected with the separating tank 11. The driving motor 14 is fixedly arranged at the top of the separation tank 11, and the driving motor 14 is connected with the driving rod 12 through a belt to realize transmission. The separation filter screen 13 is sleeved on the driving rod 12, and the separation filter screen 13 is in threaded fit with the driving rod 12. The separation screen 13 may be a pure copper mesh cover coated with a thin layer of glyceryl stearate. The separation screen 13 is distributed along the conical surface with the opening upward, and the edge is abutted against the inner wall of the separation tank 11.
Referring to fig. 2 and 3, the drive rod 12 includes a sleeve 121 and a threaded rod 122. Wherein the sleeve 121 is a hollow metal round tube with two open ends. Bearings are respectively sleeved at two ends of the sleeve 121, the outer ring of the top bearing is fixedly arranged on the inner wall of the separation tank 11, and the outer ring of the bottom bearing is connected on the bottom inner wall of the separation tank 11 through a bracket. An elongated kidney-shaped hole is provided through the sidewall of the sleeve 121. The inner wall of the sleeve 121 is provided with two threaded rods 122 in sliding connection along a direction perpendicular to the axis of the sleeve 121. The thread section of the threaded rod 122 is threaded through the kidney-shaped hole and is in threaded engagement with the separation screen 13. As the two threaded rods 122 move toward the center of the sleeve 121, the threaded segments retract into the kidney-shaped apertures and disengage from the separation screen 13.
Referring to fig. 4, the air flotation mechanism 2 includes a water tank 21, an air flotation screen 22, a pressurization assembly 23, and a scraping assembly 24. Wherein the water tank 21 is provided at one side of the separation mechanism 1, and the water tank 21 communicates with the water outlet pipe 112. The air-float filter 22 is installed inside the water tank 21, and the air-float filter 22 is slidably connected with the water tank 21 along the height direction of the water tank 21. The pressurizing assembly 23 is provided at one side of the water tank 21 and communicates with the bottom of the water tank 21. A scraping assembly 24 is mounted on top of the water tank 21. The bottom of the water tank 21 is provided with a drain pipe 211. The drain pipe 211 and the drain pipe 112 are mutually attached and spirally wound.
Referring to fig. 4 and 5, the air-float screen 22 includes a stopper frame 221 and a nickel foam screen 222. The stopper frame 221 may be a metal frame body slidably coupled to the inner wall of the water tank 21 in the height direction of the water tank 21. The foam nickel net 222 is clamped inside the limiting frame 221. The number of nickel foam wires 222 is 2. The two layers of foam nickel nets 222 are uniformly and fixedly provided with cushion blocks along a fixed interval. Lifting lugs are symmetrically arranged on two sides of the upper surface of the limiting frame 221.
Referring to fig. 4 and 6, the pressurizing assembly 23 includes a pressure tank 231, an air compressor 232, a shunt 233, and a pressure reducing valve 234. Wherein the pressure tank 231 is fixedly installed at one side of the water tank 21. The air compressor 232 is fixedly arranged at one side of the pressure tank 231, and the output end of the air compressor 232 is communicated with the inside of the pressure tank 231. One end of the shunt tube 233 is communicated with the bottom of the pressure tank 231, and the other end is uniformly shunted into a plurality of branch tubes. A plurality of branch pipes are penetrated in the bottom of the water tank 21 in the horizontal direction. A plurality of diversion holes are uniformly arranged on the branch pipes along the length direction of the axis. A pressure relief valve 234 is mounted to the end of the shunt tube 233 adjacent the pressure tank 231.
Referring to fig. 4 and 7, scraper assembly 24 includes a flight conveyor 241 and a scraper 242. The link plate conveyor belt 241 is installed at the top of the water tank 21, and the scraper 242 is obliquely installed on the link plate of the link plate conveyor belt 241 by means of a clamping connection.
The implementation principle of the air floatation separation device for the oil sewage provided by the embodiment of the application is as follows: the oil-water mixture with more oil content and higher mixing degree enters the separating mechanism 1 from the water inlet pipe 111, after standing for a period of time, part of the oil content floats upwards to the top of the separating tank 11 to be discharged, and the driving motor 14 drives the driving rod 12 to rotate in a belt transmission mode, so that the separating filter screen 13 positioned at the bottom of the separating tank 11 rises along the axial direction of the driving rod 12. The lipophilicity of the separation screen 13 will drive more oil components to fuse with each other to form droplets and float up towards the top of the separation tank 11. The pretreated oil-water mixture enters the water tank 21 through the water outlet pipe 112, a large amount of bubbles can be generated by the purified water which is dissolved with excessive air and flows out of the shunt pipe 233 at the bottom of the water tank 21, the foam nickel screen 222 structure in the air floatation filter screen 22 can damage the emulsifier film on the oil drop surface in the emulsified oil-water mixture, the oil drops are adsorbed together, and the oil drops are stored in the slit in the middle of the foam nickel screen 222. The bubbles can carry excessive oil drops to continue to float to the water surface and form foam oil residues, and the scraping plate 242 scrapes the oil residues from the water surface under the drive of the link plate conveying belt 241. The purified water is discharged from the water discharge pipe 211, and the temperature of the oil-water mixture in the water discharge pipe 112 is reduced in a heat exchange manner, so that the separation efficiency and the purity of the separated product are further improved.
The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims (10)

1. An air supporting separator for oily water, its characterized in that: comprises a separation mechanism (1) and an air floatation mechanism (2) communicated with the separation mechanism (1); the separating mechanism (1) comprises a separating tank (11), a driving rod (12) vertically penetrating through the separating tank (11) along the axial direction, a separating filter screen (13) sleeved on the driving rod (12) and attached to the inner wall of the separating tank (11), and a driving motor (14) arranged at the top of the separating tank (11), wherein the driving motor (14) is in transmission connection with the driving rod (12); the top and the bottom of the separation tank (11) are respectively connected with a water inlet pipe (111) and a water outlet pipe (112), and the water outlet pipe (112) is communicated with the air floatation mechanism (2).
2. An air flotation separation apparatus for oily water according to claim 1, wherein: the driving rod (12) comprises a sleeve (121) vertically penetrating through the separating tank (11) along the axis direction and a threaded rod (122) symmetrically penetrating through the sleeve (121), two kidney-shaped holes are symmetrically formed in the side wall of the sleeve (121) along the length direction, the threaded rod (122) is slidably connected with the sleeve (121) along the direction perpendicular to the axis, and a threaded section of the threaded rod (122) is clamped in the kidney-shaped holes and is in threaded fit with the separating filter screen (13).
3. An air flotation separation apparatus for oily water according to claim 1, wherein: the separation filter screens (13) are distributed along the conical surface shape with the upward opening.
4. An air flotation separation apparatus for oily water according to claim 1, wherein: the air floatation mechanism (2) comprises a water tank (21) communicated with the water outlet pipe (112), an air floatation filter screen (22) arranged in the water tank (21) along the horizontal direction, a pressurizing assembly (23) arranged on one side of the water tank (21) and a scraping assembly (24) arranged on the top of the water tank (21); the air-float filter screen (22) is connected with the water tank (21) in a sliding manner along the direction vertical to the ground.
5. The air flotation separation apparatus for oily water of claim 4, wherein: the water tank (21) is close to one side of the separating mechanism (1) and is provided with a drain pipe (211), and the drain pipe (211) and the water outlet pipe (112) are mutually attached and spirally wound.
6. The air flotation separation apparatus for oily water of claim 4, wherein: the scraping assembly (24) comprises a chain plate conveying belt (241) arranged at the top of the water tank (21) and a plurality of scraping plates (242) which are obliquely clamped on the chain plates of the chain plate conveying belt (241).
7. The air flotation separation apparatus for oily water of claim 4, wherein: the pressurizing assembly (23) comprises a pressure tank (231) fixedly arranged on one side of the water tank (21), an air compressor (232) arranged on one side of the pressure tank (231), a shunt pipe (233) with one end communicated with the bottom of the pressure tank (231) and a pressure reducing valve (234) arranged on the shunt pipe (233); the other end of the shunt pipe (233) is communicated with the bottom of the water tank (21).
8. The air flotation separation apparatus for oily water of claim 4, wherein: the air-float filter screen (22) comprises a limit frame (221) which is in sliding connection with the water tank (21) and a plurality of layers of foam nickel screens (222) which are mutually parallel and arranged in the limit frame (221).
9. The air flotation separation apparatus for oily water of claim 8, wherein: and a pair of lifting lugs are symmetrically arranged on the upper surface of the limiting frame (221).
10. The air flotation separation apparatus for oily water of claim 8, wherein: and a cushion block is arranged between the foam nickel screens (222).
CN202311196221.6A 2023-09-18 2023-09-18 Air-float separation device for oil sewage Active CN116924516B (en)

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