CN209835700U - Rotational flow air flotation device with adjustable rotational flow strength - Google Patents
Rotational flow air flotation device with adjustable rotational flow strength Download PDFInfo
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- CN209835700U CN209835700U CN201822258195.6U CN201822258195U CN209835700U CN 209835700 U CN209835700 U CN 209835700U CN 201822258195 U CN201822258195 U CN 201822258195U CN 209835700 U CN209835700 U CN 209835700U
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Abstract
The utility model discloses a whirl air supporting device with adjustable whirl intensity: the oil-saving tank comprises a cylindrical tank body, wherein an upper elliptical sealing head and a lower elliptical sealing head are arranged at the upper end and the lower end of the tank body respectively, an oil outlet is formed in the upper elliptical sealing head, a water outlet is formed in the lower elliptical sealing head, a tangential inlet pipe is arranged at the middle upper part of the side wall of the tank body, a pipe diameter adjusting valve is arranged on the tangential inlet pipe, a guide vane is arranged on the inner wall of the upper end in the tank body, and; a diameter-adjustable flow stabilizing cylinder is arranged in the tank body, cylinder diameter adjusting valves are connected to two sides of the flow stabilizing cylinder, the diameter of the flow stabilizing cylinder is adjusted through the cylinder diameter adjusting valves, and the equivalent rotation radius of fluid in the tank body is changed; the inside of jar body lower extreme is provided with conical vortex ware. The utility model has the characteristics of compact structure, easy operation, running cost are low, separation efficiency is high, can be used to the processing of offshore platform extraction water and the oily sewage's of land combined station, petrochemical plant etc. processing.
Description
Technical Field
The utility model relates to an oily sewage treatment technical field, more specifically says so, relates to a whirl air supporting device with adjustable whirl intensity.
Background
At present, most oil fields in China enter the middle and later stages of oil field exploitation, the content of produced water in the oil fields is continuously increased, and the input of the treatment cost of the produced water is increased. Physical methods are the most economical method in a plurality of methods for treating oily sewage, but the treatment efficiency is low, and the physical methods and other methods are combined into a set of process to achieve the final treatment effect. In order to improve the treatment efficiency of a single oil removal device, researchers begin to combine two or more treatment technologies into one device, and the fact shows that the research idea not only improves the treatment efficiency of the device, but also saves the floor area of the device and is widely accepted. The cyclone air flotation is an effective coupling technology of a centrifugal separation technology and an air flotation technology, the technology is researched at the earliest abroad, in 2001, an air flotation device (EPCON CFU) developed by Norwegian company is respectively subjected to field installation tests in a Brage oil field and a Troll C oil field, the oil content in treated water is basically below 20mg/L, the separation effect is very ideal, the success of the test pulls open the prosperous development of the cyclone air flotation technology, and the research and development of the cyclone air flotation technology are successively developed from home and abroad.
In the process of developing the research on the rotational flow air flotation technology, researchers continuously optimize the internal structure of the equipment in order to increase the competitiveness of the equipment so as to obtain a better treatment effect. In patent CN201110098951.3, an ejector is added to a cyclone air flotation device to increase the centrifugal acceleration of fluid inside the device, thereby increasing the oil-water separation effect; in patent CN201310245879.3, the swirl strength of the fluid in the swirl flotation device is increased by adding a plurality of baffles and designing the layout and the inclination angle of the baffles.
Conventional whirl air supporting device mainly includes the jar body, the stationary flow section of thick bamboo, the tangential inlet tube, the oil drain port, the outlet, the water conservancy diversion piece (or diversion nozzle) etc. partial constitution, though a large amount of researchers have carried out the upgrading optimization on conventional whirl air supporting device's basis, but theory of operation is roughly the same, its theory of operation is at equipment entry pipeline leading-in gas (natural gas or nitrogen gas are commonly used in the oil field), make aquatic produce a large amount of microbubbles, in order to form water, the three-phase mixture of gas and the material of being got rid of, under the combined action of multiple forces such as interfacial tension, microbubble buoyancy and hydrostatic pressure difference, promote the microbubble to adhere on tiny oil drips, form the mixture that density is less than water, thereby force the come-up to the sewage. Oily sewage enters the tank from the tangential inlet pipe and forms softer rotational flow motion under the guidance of the inlet spiral guide vane, and the centrifugal acceleration is generally 8-10 times of the gravity acceleration. At the same time, as the fluid pressure drops due to the increase in fluid flow rate, a residual portion of the dissolved gas in the oil-laden water is released in the form of bubbles. However, the patent and the relevant experimental conditions applied at present show that the treatment effect of the rotational flow air flotation on the produced water of different oil fields is different, the adaptability of the device is poor, even the rotational flow air flotation device is only suitable for being applied to the oily sewage treatment of a light oil field, and the effect shown in the oily sewage treatment of a heavy oil field is not good, so that the application market of the rotational flow air flotation device is greatly reduced, and the competitiveness of the device is also reduced.
The cyclone air flotation device mainly realizes oil-water separation by means of centrifugal force and buoyancy of bubbles, and the process that oil drops are gathered and float upwards to the outer wall of the flow stabilizing cylinder can be finished only when the bubbles are effectively contacted with the oil drops. Korean et al found that in the cyclone flotation process, the factors influencing the separation efficiency mainly include physical parameters, operation parameters and structural parameters. The physical parameters influencing the total collision efficiency mainly include the diameter of dispersed phase particles/oil drops, the density of the dispersed phase particles/oil drops and the temperature of medium water, the operation parameters mainly include the diameter of bubbles and the speed of a tangential inlet pipe, and the structural parameters mainly include equivalent rotating diameter. The collision efficiency increases with increasing tangential velocity and decreases with increasing swirler diameter. However, when the tangential velocity is increased to a certain extent, the adhesion efficiency and the adhesion stabilization efficiency are lowered due to an increase in the shearing force generated by the turbulent flow, thereby affecting the final separation efficiency; there is also an optimum value for the cyclone diameter, which is mainly that the cyclone diameter in the actual process cannot be too small, which would be too severe to be beneficial to the air-flotation separation effect. The fact that the oily sewage of different oil fields has different physical parameters aiming at different regions is difficult to change, and the operation parameters and the structural parameters can be realized by changing the structure of the device.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the not enough among the prior art, provide a whirl air supporting device with adjustable whirl intensity, have characteristics such as compact structure, easy operation, running cost low, separation efficiency height, can be used to the processing of offshore platform produced water and the oily sewage's of land combined station, petrochemical industry factory etc. processing.
The purpose of the utility model can be realized by the following technical scheme.
The utility model discloses a whirl air supporting device with adjustable whirl intensity, including cylindrical jar body, the upper and lower both ends of jar body are provided with oval upper cover and oval lower cover respectively, oval upper cover is provided with the oil-out, oval lower cover is provided with the delivery port, upper middle portion of the lateral wall of jar body is provided with oily sewage tangential inlet tube, be provided with the pipe diameter governing valve on the tangential inlet tube, the internal upper end inner wall of jar body is provided with guide vane, guide vane initiating terminal and tangential inlet tube terminal smooth excessive linking; a diameter-adjustable flow stabilizing cylinder is arranged in the tank body, cylinder diameter adjusting valves are connected to two sides of the flow stabilizing cylinder, the flow stabilizing cylinder is fixed with the tank body through the cylinder diameter adjusting valves, the diameter of the flow stabilizing cylinder is adjusted through the cylinder diameter adjusting valves, and the equivalent rotation radius of fluid in the tank body is changed; the inside of jar body lower extreme is provided with conical vortex ware.
The flow stabilizing cylinder and the tank body are coaxially arranged, and the guide vanes are fixed between the flow stabilizing cylinder and the tank body.
Compared with the prior art, the utility model discloses a beneficial effect that technical scheme brought is:
(1) the utility model discloses on traditional whirl air supporting device basis, increase a stationary flow section of thick bamboo with adjustable diameter, through the internal diameter of an adjustment stationary flow section of thick bamboo, can change the radius of rotation of fluid at jar internal portion to fluid centrifugal strength has been changed, make different fluids can both carry out water oil separating under suitable centrifugal strength.
(2) The utility model discloses increased the pipe diameter governing valve on the tangential inlet tube, through adjusting the pipe diameter size, adjusted the speed that the fluid got into jar body, indirect adjustable fluidic centrifugal strength has widened the range of application of whirl air supporting device.
(3) The utility model has the characteristics of convenient operation alright automatic control, and unpowered equipment, it is convenient to maintain, take up an area of for a short time, noiseless etc.
Drawings
FIG. 1 is a schematic structural view of a cyclone air-flotation device with adjustable cyclone strength of the utility model;
fig. 2 is a cross-sectional top view of the flow stabilizing cylinder of the present invention.
Reference numerals of the device are 1 oil outlet, 2 elliptical upper end sockets, 3 tank bodies, 4 guide vanes, 5 pipe diameter regulating valves, 6 tangential inlet pipes, 7 cylinder diameter regulating valves, 8 flow stabilizing cylinders, 9 vortex generators, 10 elliptical lower end sockets and 11 water outlets.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1 and 2, the utility model discloses a whirl air supporting device with adjustable whirl intensity, including cylindrical jar body 3, both ends are provided with oval upper cover 2 and oval low head 10 respectively about jar body 3, oval upper cover 2 is provided with oil-out 1, oval low head 10 is provided with delivery port 11. The middle upper portion of the side wall of the tank body 3 is provided with an oily sewage tangential inlet pipe 6, the tangential inlet pipe 6 is provided with a pipe diameter adjusting valve 5, the speed of fluid entering the tank body 3 is adjusted by changing the pipe diameter, and therefore the rotating strength of the fluid in the tank body 3 is adjusted.
The inner wall of the upper end in the tank body 3 is provided with a guide vane 4 which is in a spiral rising shape, and the starting end of the guide vane 4 is smoothly and excessively connected with the tail end of the tangential inlet pipe 6. A flow stabilizing cylinder 8 with adjustable diameter is arranged in the tank body 3, so that the rotating hydraulic radius of oil droplets is reduced, and the rotational flow attenuation phenomenon is prevented. The flow stabilizing cylinder 8 and the tank body 3 are coaxially arranged, and the guide vanes 4 are fixed between the flow stabilizing cylinder 8 and the tank body 3.
The inside stationary flow section of thick bamboo 8 of jar body 3 is folding cask, 8 both sides of stationary flow section of thick bamboo are connected with a section of thick bamboo footpath governing valve 7, stationary flow section of thick bamboo 8 is fixed with jar body 3 through a section of thick bamboo footpath governing valve 7, can play the effect of supporting stationary flow section of thick bamboo 8, and adjusts the diameter of stationary flow section of thick bamboo through rotatory section of thick bamboo footpath governing valve 7 to change the equivalent radius of rotation of fluid in jar body 3 inside, thereby adjust the rotation strength of fluid. The conical vortex generator 9 is arranged in the lower end of the tank body 3, so that the generation of vortex can be promoted, the floating speed of oil drops can be increased, the suction effect of the lower water outlet 11 and the drag force of the floating oil drops are weakened, the upper flow field of the water outlet 11 is stable, and a relatively calm flotation environment is provided for the oil drops.
The utility model discloses a carry out configuration optimization design at operating parameter and structural parameter on traditional whirl air supporting device basis, increase pipe diameter governing valve 5 on whirl air supporting device's tangential inlet tube 6, come the speed that the fluid got into jar body 3 with the size of adjusting the 6 pipe diameters of tangential inlet tube, through the stationary flow section of thick bamboo 8 that increases diameter adjustable in jar body 3 inside, realize changing the equivalent radius of rotation of fluid in jar body 3. The utility model discloses a core thought is through above two kinds of regulation methods for the collision efficiency of oil drop and bubble reaches the best, makes whirl air supporting device carry out the operating parameter to the oily sewage of the rerum natura parameter of difference and adjusts, the wide application degree of the device that also increases when improving treatment effeciency.
The utility model discloses an operation method of whirl air supporting device with adjustable whirl intensity, concrete process is as follows:
the first step is as follows: oily sewage and gas required by rotational flow air flotation are uniformly mixed through a gas-liquid mixing pump, the mixture enters the tank body 3 through the tangential inlet pipe 6, and gas-liquid mixed fluid entering the tank body 3 can be guided into upward spiral flow in the process of flowing from the starting end to the ending end of the guide vane 4, so that a rotary centrifugal force field is formed in the tank body 3. The speed of the fluid entering the tank body 3 is changed by adjusting the pipe diameter adjusting valve 5, the inner diameter of the flow stabilizing cylinder 8 is adjusted by adjusting the cylinder diameter adjusting valve 7, and the rotational flow strength of the fluid in the tank body 3 can be further changed by two methods.
The second step is that: under the action of the centrifugal force field, water with high density moves towards the inner wall of the tank body 3, and light components such as oil phase, bubbles adhered with oil drops and the like generate relative inward radial migration and reach the area near the outer wall of the flow stabilizing cylinder 8.
The third step: the oil phase gathered near the outer wall of the flow stabilizing cylinder 8 and the light components such as bubbles adhered with oil drops begin to float upwards under the action of buoyancy, and the floating oil phase and the light components such as bubbles adhered with oil drops are finally discharged through the oil outlet 1.
The fourth step: the gas-liquid mixed fluid rotates and flows downwards after entering the tank body 3, and the purified water is finally discharged from the water outlet 11.
Although the present invention has been described with reference to the accompanying drawings, the present invention is not limited to the above specific functions and operations, and the above specific embodiments are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the spirit and scope of the present invention, which is within the protection scope of the present invention.
Claims (2)
1. A rotational flow air flotation device with adjustable rotational flow strength comprises a cylindrical tank body (3), wherein an elliptical upper end enclosure (2) and an elliptical lower end enclosure (10) are respectively arranged at the upper end and the lower end of the tank body (3), the elliptical upper end enclosure (2) is provided with an oil outlet (1), and the elliptical lower end enclosure (10) is provided with a water outlet (11), and is characterized in that an oily sewage tangential inlet pipe (6) is arranged at the middle upper part of the side wall of the tank body (3), a pipe diameter adjusting valve (5) is arranged on the tangential inlet pipe (6), a guide vane (4) is arranged on the inner wall of the upper end in the tank body (3), and the starting end of the guide vane (4) is smoothly and excessively connected; a diameter-adjustable steady flow cylinder (8) is arranged in the tank body (3), cylinder diameter adjusting valves (7) are connected to two sides of the steady flow cylinder (8), the steady flow cylinder (8) is fixed with the tank body (3) through the cylinder diameter adjusting valves (7), the diameter of the steady flow cylinder (8) is adjusted through the cylinder diameter adjusting valves (7), and the equivalent rotation radius of fluid in the tank body (3) is changed; the lower end of the tank body (3) is internally provided with a conical vortex generator (9).
2. Swirl-flow flotation device with adjustable swirl strength according to claim 1, characterised in that the flow-stabilizing cylinder (8) and the tank (3) are arranged coaxially, and the guide vanes (4) are fixed between the flow-stabilizing cylinder (8) and the tank (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822258195.6U CN209835700U (en) | 2018-12-30 | 2018-12-30 | Rotational flow air flotation device with adjustable rotational flow strength |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822258195.6U CN209835700U (en) | 2018-12-30 | 2018-12-30 | Rotational flow air flotation device with adjustable rotational flow strength |
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| CN209835700U true CN209835700U (en) | 2019-12-24 |
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| CN201822258195.6U Active CN209835700U (en) | 2018-12-30 | 2018-12-30 | Rotational flow air flotation device with adjustable rotational flow strength |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109607658A (en) * | 2018-12-30 | 2019-04-12 | 中海油能源发展股份有限公司安全环保分公司 | A kind of adjustable cyclone air-flotation device of swirl strength and operating method |
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2018
- 2018-12-30 CN CN201822258195.6U patent/CN209835700U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109607658A (en) * | 2018-12-30 | 2019-04-12 | 中海油能源发展股份有限公司安全环保分公司 | A kind of adjustable cyclone air-flotation device of swirl strength and operating method |
| CN109607658B (en) * | 2018-12-30 | 2023-12-15 | 中海油能源发展股份有限公司安全环保分公司 | Cyclone air floatation device with adjustable cyclone strength and operation method |
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