CN102847618B - Secondary separation cyclone - Google Patents
Secondary separation cyclone Download PDFInfo
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- CN102847618B CN102847618B CN 201210345243 CN201210345243A CN102847618B CN 102847618 B CN102847618 B CN 102847618B CN 201210345243 CN201210345243 CN 201210345243 CN 201210345243 A CN201210345243 A CN 201210345243A CN 102847618 B CN102847618 B CN 102847618B
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Abstract
The invention provides a secondary separation cyclone which is mainly used for solving the problem that the existing cyclone separator has a poor effect on separating small oil drops. The secondary separation cyclone is characterized in that: the lower end of a first-grade cyclone pipe is sequentially connected with a second-grade cone section and a second-grade underflow pipe; a cyclone separator is fixed in the cyclone pipe and is formed by connecting a second-grade overflow pipe, a second-grade overflow cone section, a spiral sheet fixing pipe and a second-grade liquid collecting port; a diversion spiral sheet is fixed outside the spiral sheet fixing pipe, and the contour of the diversion spiral sheet is in contact with the inner wall of the first-grade cyclone pipe; a first-grade overflow pipe is connected outside the second-grade overflow pipe, and an annular gap is formed between the two pipes so that a medium in a first-grade cyclone cavity overflows along the annular gap; and the straight pipe length of the first-grade overflow pipe is less than the straight pipe length of the second-grade overflow pipe, both the first-grade overflow pipe and the second-grade overflow pipe penetrate through an upper end cover, and the outer wall of the first-grade overflow pipe is in closed connection with a corresponding hole of the upper end cover. The separation cyclone can increase the separation efficiency of small oil drops and can realize secondary separation.
Description
Technical field
The present invention relates to a kind of cyclonic separation treating apparatus that is applied to carry out in oil, chemical industry and the environmental protection field sewage disposal.
Background technology
At present, in oil, chemical industry and environmental protection field, carry out the fast separating process that profit two is separated and mainly contain cyclonic separation, air supporting choosing, filtration and methods such as film separates.Wherein, the scope of gas floatation adaptation oil concentration variation is less; Though filtration method can be realized the separation of profit two-phase preferably, need backwash frequently to guarantee the long-term stability operation of equipment for high oil-polluted water; The membrane separation process equipment cost is higher, requires again comparatively strict to ambient condition.Comparatively speaking, therefore the cyclonic separation method is to use comparatively general method because the equipment volume that adopts is less, construction cost is low, but existing separation equipment is limited in one's ability for the removal of tiny oil droplet, therefore, has limitation in application.The main hydrocyclone that adopts is as separation equipment in the cyclonic separation method, and its separation principle is to utilize the density contrast between medium to carry out centrifugation, and density contrast is more big, or the particle diameter of decentralized photo is more big, and separating effect is relatively just more good.At present, the high moisture productive life during oil field development has entered, along with the poly-scale of driving constantly enlarges, the polymer-bearing waste-water produced quantity increases year by year.Because polymer-bearing waste-water viscosity is big, the settling section oil removal efficiency is low in the surface technology of oil field, has increased the load of fillter section, causes filtrate seriously polluted, the filtering water variation.Increasing water drive sewage plant has also been seen polymer, causes the water quality treatment variation, is difficult to satisfy waterflooding requirement.It will be severeer can predicting the water quality situation along with the ternary composite driving oil tech applies while.Therefore, how to improve water quality and become the hot issue that the oilfield surface engineering system is competitively studied.
Summary of the invention
In order to solve the technical problem of mentioning in the background technology, the invention provides a kind of secondary separation cyclone, this kind separate hydrocyclone can improve the efficient that tiny oil droplet is separated, can realize secondary separation, and according to existing two-stage cyclonic unit, equipment volume is further reduced, and has stronger practicality.
Technical scheme of the present invention is: this kind secondary separation cyclone, the one-level cyclone pipe and the upper end cover that comprise a cylindrical hollow, have with the chorista excircle at the upper end of described one-level cyclone pipe sidewall and to be the both direction of tangential access inlet tube relative, parallel to each other, its unique distinction is: be connected with a hollow secondary awl section in described one-level cyclone pipe lower end, be connected with a secondary underflow pipe that is straight tube-like in secondary awl section lower end; A cyclonic separation body is fixedly arranged in described one-level cyclone pipe, described cyclonic separation body constitutes after being connected by secondary overflow pipe, secondary Overflow Cone section, flight stationary pipes and secondary liquid collecting mouth successively from top to bottom, wherein, secondary overflow pipe and flight stationary pipes all are straight tube-like, described secondary overflow pipe is identical with the Taper Pipe miner diameter end caliber of secondary Overflow Cone section, and the flight stationary pipes is identical with the Taper Pipe bigger diameter end caliber of secondary Overflow Cone section; Outside described flight stationary pipes, the water conservancy diversion flight is arranged fixedly, the gabarit of described water conservancy diversion flight is tactile mutually with the inwall of one-level cyclone pipe, separate as the inner chamber of one-level cyclone pipe with this water conservancy diversion flight, the chamber that is positioned at water conservancy diversion flight top is one-level eddy flow chamber, and the chamber that is positioned at water conservancy diversion flight bottom is secondary eddy flow chamber; In the tip exterior of described secondary overflow pipe, adopt coaxial manner to be connected with an one-level overflow pipe, there is annular space to overflow along this annular space to realize the medium in the described one-level eddy flow chamber between described secondary overflow pipe and the one-level overflow pipe; The length of straight pipe of described one-level overflow pipe is less than the length of straight pipe of secondary overflow pipe, and described one-level overflow pipe and secondary overflow pipe all pass upper end cover, and the outer wall of one-level overflow pipe is done closed the connection with the corresponding tapping of upper end cover.
The present invention has following beneficial effect: this kind cyclone adopts the structure of secondary separation, and the cyclone underflow is further purified, and can further strengthen deoiling effect, guarantees two treatment effects that are separated, and improves the high efficiency that eddy flow is handled.In addition, according to existing two-stage cyclonic unit, equipment volume is further reduced, and can dwindle greatly to take up room.In addition, this kind separation equipment is not limited to two and is separated, and also can be used for the integrated cyclonic separation of three-phase medium, for the design of two-phase and heterogeneous separation equipment provides a new thinking, promotes the development of isolation technics.
Description of drawings:
Fig. 1 is A-A cross-section profile structural representation of the present invention.
Fig. 2 is B-B cross-section profile structural representation of the present invention.
Fig. 3 is flight stationary pipes of the present invention and the structural representation that is fixed on the water conservancy diversion flight on the pipe.
Fig. 4 overall appearance structural representation of the present invention.
Fig. 5 is for showing the schematic diagram of each intraware size relationship of the present invention.
1-one-level overflow pipe among the figure, 2-secondary overflow pipe, 3-inlet tube, 4-one-level cyclone pipe, 5-secondary Overflow Cone section, 6-water conservancy diversion flight, 7-secondary liquid collecting mouth, 8-secondary eddy flow chamber, 9-secondary awl section, 10-secondary underflow pipe, 11-flight stationary pipes, 12-one-level eddy flow chamber, 13-upper end cover.
The specific embodiment:
The invention will be further described below in conjunction with accompanying drawing:
Extremely shown in Figure 4 by Fig. 1, the concrete formation scheme of this kind secondary separation cyclone is as follows: the upper end cover 13 that the one-level cyclone pipe 4 of a cylindrical hollow is arranged on the top and be used for sealing has with the chorista excircle at the upper end of described one-level cyclone pipe 4 sidewall and to be the both direction of tangential access inlet tube 3 relative, parallel to each other.
In addition, be connected with a hollow secondary awl section 9 in described one-level cyclone pipe 4 lower ends, be connected with a secondary underflow pipe 10 that is straight tube-like in secondary awl section 9 lower ends; A cyclonic separation body is fixedly arranged in described one-level cyclone pipe 4, and described cyclonic separation body constitutes after being connected by secondary overflow pipe 2, secondary Overflow Cone section 5, flight stationary pipes 11 and secondary liquid collecting mouth 7 successively from top to bottom.Wherein, secondary overflow pipe 2 and flight stationary pipes 11 all are straight tube-like, and described secondary overflow pipe 2 is identical with the Taper Pipe miner diameter end caliber of secondary Overflow Cone section 5, and flight stationary pipes 11 is identical with the Taper Pipe bigger diameter end caliber of secondary Overflow Cone section 5.Outside described flight stationary pipes 11, water conservancy diversion flight 6 is arranged fixedly, the gabarit of described water conservancy diversion flight is tactile mutually with the inwall of one-level cyclone pipe 4, separate as the inner chamber of one-level cyclone pipe 4 with this water conservancy diversion flight, the chamber that is positioned at water conservancy diversion flight top is one-level eddy flow chamber 12, and the chamber that is positioned at water conservancy diversion flight bottom is secondary eddy flow chamber 8.
In addition, in the tip exterior of described secondary overflow pipe 2, adopt coaxial manner to be connected with an one-level overflow pipe 1, have annular space to overflow along this annular space to realize the medium in the described one-level eddy flow chamber between described secondary overflow pipe 2 and the one-level overflow pipe 1.The length of straight pipe of described one-level overflow pipe 1 is less than the length of straight pipe of secondary overflow pipe 2, and described one-level overflow pipe 1 and secondary overflow pipe 2 all pass upper end cover 13, and the outer wall of one-level overflow pipe 1 is done closed the connection with the corresponding tapping of upper end cover 13.
When Fig. 5 is concrete enforcement, show the schematic diagram of each intraware size relationship of the present invention.Wherein the diameter of one-level overflow pipe is expressed as D
1, the diameter of secondary overflow pipe is expressed as D
2, the diameter of secondary liquid collecting mouth is expressed as D
3, the diameter of secondary underflow pipe is expressed as D
4, the big footpath of secondary Overflow Cone section is expressed as D
5, the altimeter of one-level cyclone pipe is shown H
1,Secondary Overflow Cone section altimeter is shown H
2, one-level overflow pipe built-in length is expressed as H
3, the altimeter of secondary overflow pipe is shown H
4, the altimeter in secondary eddy flow chamber is shown H
5, the altimeter of secondary underflow pipe is shown H
6, the cone angle of secondary Overflow Cone section is expressed as α
1, the cone angle of secondary awl section is expressed as α
2, the number of turns of water conservancy diversion flight is expressed as N, and the outer ring lift angle of flight is expressed as β.After determining each intraware size relationship of the present invention according to following from (1) to (16) listed condition, resulting cyclone separating effect is better.Condition is as follows:
(1) 0.2D＜D
1＜0.65D; (2) 0.2D＜H
3＜1.5D; (3) 2D＜H
1＜8D; (4) 0.2D
1＜D
2＜0.8D
1(5) 2D＜H
2＜6D; (6) D＜H
4＜4D; (7) 5 degree＜α
1＜90 degree; (8) 0.6D＜D
5＜0.9D; (9) 2＜N＜8; (10) 0 degree＜β＜50 degree; (11) 0.5D
2＜D
3＜2.5D
2(12) 0.1D＜H
7＜0.8D; (13) 0.5D＜H
5＜2D; (14) 2 degree＜α
2＜45 degree; (15) 0.05D＜D
4＜0.3D); (16) 0.1D＜H
6＜3D.
This programme obtains the subsidy of national 863 Program 2012AA061303 problem and the natural science fund ZD201018 of Heilongjiang Province project in the specific implementation process, obtain above preferred embodiment through testing in many ways.In addition, during specific implementation, entrance also can adopt the axial entrance pipe, and the tangential inlet pipe can adopt single entrance or multiple entry structure, and the two entrance structures that are not limited to propose in this programme.Equally, secondary awl section also can adopt the pattern of single awl, bipyramid and curved cone.
The concrete course of work of this kind of cyclone is as follows:
The separation principle of this kind of cyclone is utilized two kinds of immiscible liquid density of medium differences and is carried out centrifugation.Be separated into example with the profit two-phase, oil-water mixture enters separator inside by the tangential inlet pipe, in the one-level cyclone pipe, form the rotating flow of height, the water that density is big, be subjected to action of centrifugal force to be thrown toward the inwall in eddy flow chamber, the oil phase that density is little accumulates in the outer wall place of secondary overflow pipe, and upwards discharges along the annular space between one-level overflow pipe and the secondary overflow pipe.Through after the first separation, do not separate being further rotated after the water that contains a small amount of oil completely enters the water conservancy diversion flight through one-level eddy flow chamber.Under this programme, because one-level cyclone pipe outside wall surface size constancy, and secondary Overflow Cone section adopts cone structure, thereby formed a variable cross-section annular space inner chamber, can promote the separation of oil droplet and coalescent, form larger oil droplet in its outside wall surface and also assemble upwards, under the drive of rotation blending agent, further along upwards discharge of the annular space between one-level overflow pipe and the secondary overflow pipe.After separating the water contain a small amount of oil completely and entering flight, through after the guide functions of flight, force to keep the direction of rotation of fluid, make and in secondary eddy flow chamber, form the height rotating flow, carry out secondary separation, wherein secondary awl section has the certain energy compensating action to rotating fluid, speed loss in the compensation separation process, be conducive to the separation of two-phase, separate finally by crossing, lightweight oil is mutually examined the secondary liquid collecting mouth that enters the center, is finally discharged by the secondary overflow pipe through the cavity of flight center, the cavity of secondary Overflow Cone intersegmental part.At last, discharge along the secondary underflow pipe through the heavy phase water of secondary separation.
This invention also can be used for the integrated cyclonic separation of three-phase medium.For example can carry out three phase separation such as oil gas water, gas-liquid is solid, be separated into example to carry out gas-liquid-solid three-phase, the gas-liquid-solid three-phase medium is entered in the cyclone pipe by the two inlets entrance, forming gas nuclear through cyclonic separation gas at the place, axle center is discharged by the one-level overflow pipe, through after the degasification, solid-liquid two-phase flow enters secondary eddy flow chamber after the guide functions of flight, in secondary eddy flow chamber, form the height rotating flow, carry out Separation of Solid and Liquid, wherein the solid that density is big is followed the partially liq medium, form with fluid is discharged by the secondary underflow pipe, and the liquid that density is little is upwards discharged by secondary liquid collecting mouth.
Claims (1)
1. secondary separation cyclone, the one-level cyclone pipe (4) and the upper end cover (13) that comprise a cylindrical hollow, have with the chorista excircle at the upper end sidewall of described one-level cyclone pipe (4) and to be the both direction of tangential access inlet tube (3) relative, parallel to each other, be connected with a hollow secondary awl section (9) in one-level cyclone pipe (4) lower end, be connected with a secondary underflow pipe (10) that is straight tube-like in secondary awl section (9) lower end, a cyclonic separation body is fixedly arranged in one-level cyclone pipe (4), it is characterized in that:
Described cyclonic separation body connects the back by secondary overflow pipe (2), secondary Overflow Cone section (5), flight stationary pipes (11) and secondary liquid collecting mouth (7) successively from top to bottom and constitutes, wherein, secondary overflow pipe (2) and flight stationary pipes (11) all are straight tube-like, described secondary overflow pipe (2) is identical with the Taper Pipe miner diameter end caliber of secondary Overflow Cone section (5), and flight stationary pipes (11) is identical with the Taper Pipe bigger diameter end caliber of secondary Overflow Cone section (5); Water conservancy diversion flight (6) is fixedly arranged outside described flight stationary pipes (11), the gabarit of described water conservancy diversion flight is tactile mutually with the inwall of one-level cyclone pipe (4), separate as the inner chamber of one-level cyclone pipe (4) with this water conservancy diversion flight, the chamber that is positioned at water conservancy diversion flight top is one-level eddy flow chamber (12), and the chamber that is positioned at water conservancy diversion flight bottom is secondary eddy flow chamber (8);
In the tip exterior of described secondary overflow pipe (2), adopt coaxial manner to be connected with an one-level overflow pipe (1), there is annular space to overflow along this annular space to realize the medium in the described one-level eddy flow chamber between described secondary overflow pipe (2) and the one-level overflow pipe (1); The length of straight pipe of described one-level overflow pipe (1) is less than the length of straight pipe of secondary overflow pipe (2), described one-level overflow pipe (1) and secondary overflow pipe (2) all pass upper end cover (13), and the outer wall of one-level overflow pipe (1) is done closed the connection with the corresponding tapping of upper end cover (13).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210345243 CN102847618B (en) | 2012-09-18 | 2012-09-18 | Secondary separation cyclone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210345243 CN102847618B (en) | 2012-09-18 | 2012-09-18 | Secondary separation cyclone |
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| CN102847618A CN102847618A (en) | 2013-01-02 |
| CN102847618B true CN102847618B (en) | 2013-08-21 |
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| CN103551262A (en) * | 2013-10-30 | 2014-02-05 | 西南石油大学 | Embedded-type inverted double-cone oil-gas-water triphase cyclone separator |
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