CN202516699U

CN202516699U - High-performance hydraulic cyclone separation device

Info

Publication number: CN202516699U
Application number: CN 201120552417
Authority: CN
Inventors: 任连城; 孟江; 魏昌祥; 雷贞贞
Original assignee: Chongqing University of Science and Technology
Current assignee: Chongqing University of Science and Technology
Priority date: 2011-12-27
Filing date: 2011-12-27
Publication date: 2012-11-07
Anticipated expiration: 2021-12-27

Abstract

The utility model discloses a high-performance hydraulic cyclone separation device, which comprises a hydraulic cyclone body (1) and a liquid inlet pipe set (2) of a bidirectional axially symmetric structure, wherein the liquid inlet pipe set (2) of the bidirectional axially symmetric structure comprises two liquid inlet pipes; the two liquid inlet pipes are axially symmetric; the two axially symmetric liquid inlet pipes are connected with a pressure stabilizing device (3) with a built-in air bag in a parallel mode; the pressure stabilizing device (3) with the built-in air bag is provided with a pressure gauge (4); a variable pump (8) is connected with the pressure stabilizing device (3) with the built-in air bag through a pressure adjusting valve (6) and a flow meter (5); and overflow is led into a liquid return box by an overflow pipe through an overflow liquid return pipe set (7). The high-performance hydraulic cyclone separation device provided by the utility model has great practical value to improving the separation efficiency of the conventional hydraulic cyclone.

Description

A kind of high-performance hydraulic cyclone separator

Technical field

The utility model relates to the separator of hydraulic cyclone efficiently that a kind of solid-liquid separates, liquid-separation operations such as liquid separation are used.

Background technology

Hydrocyclone is a kind of application non-homogeneous mixture such as solid-liquid, liquid-liquid separation equipment very widely, is a kind of separation equipment efficiently that under the effect of centrifugal force field, separates different grain size (density) mixture.Compare with settling methods, hydrocyclone separates has compact conformation, floor space is little, separating power is strong, simple to operation, separative efficiency is high, equipment maintenance cost is low, workflow is easy to plurality of advantages such as control.At present, hydrocyclone in the separation in each big field, clarification, concentrate, aspects such as washing, gradation and sorting obtain application widely.Further the separating power of raising hydrocyclone and separative efficiency have very important meaning to the prospects for commercial application of further performance hydrocyclone.

Research theory according to present hydrocyclone: highly pressurised liquid tangentially enters into hydrocyclone inside; Because the special construction of cyclone; The pressure head of liquid changes kinetic head into; Liquid is done high speed rotary motion around the cyclone axis, at this moment, and under action of centrifugal force; The centrifugal force that the separating medium (heavy phase) that granularity (density) is big receives is also big; The peripheral space that has preferentially occupied the whole separated region of cyclone forms outer eddy flow the cyclone wall is slowly descending in the effect lower edge of gravity discharges from underflow opening with the form of underflow at last, and the little separating medium (light phase) of density be brought to zone line form in eddy flow finally discharge from overfall with first-class form, thereby realized centrifugation.So; In the cyclone operate as normal; Interior media is when doing macroscopical rotatablely moving; Also there is axial velocity (the underflow opening discharge that has because the overfall from the upper end that medium finally has from inlet entering cyclone is discharged from the lower end along the cyclone axis direction; So there is the axial velocity along the cyclone axis direction in interior media) and along the radial velocity of radial direction (because medium tangentially inlet get into cyclone, though finally from overfall discharge or underflow opening to discharge all be that discharge central area from cyclone, so there is one in interior media along cyclone radial direction radial velocity inwards).In the time of the hydrocyclone operate as normal; Interior three-dimensional speed has clear physical meaning to the detached job of cyclone: wherein the main effect of tangential velocity is to produce a centrifugal force field; Under the effect of this centrifugal force field, solid particle (or heavy phase) will outwards move along the cyclone radial direction; Totally there is one along radial direction radial velocity from outside to inside owing to medium simultaneously in this; The existence of this radial velocity will be to resistance of particle of the outside motion under centrifugal action; So acting in conjunction of the viscosity resistance inwards that outside centrifugal force that solid particle is produced by tangential velocity at radial direction and radial velocity produce; The solid particle of concrete specification finally is an eddy flow or outwards motion is final gets into the influence degree to particle that outer eddy flow will depend on these two power in inwardly being moved into, if centrifugal force accounts for main aspect then particle finally enters into outer eddy flow, otherwise; If viscosity resistance is occupied an leading position; Then final solid particle will enter into interior eddy flow, if just in time equate in these two, then will rest on this radius of concrete radius upper edge to particle and move in a circle.

In a word; Operation principle according to cyclone; Solid particle in the medium finally is regular distribution at the radial direction of cyclone according to the size of particle granularity under the acting in conjunction of outside centrifugal force and inside viscosity resistance: promptly the granularity along cyclone radial direction solid particle is directly proportional with the radius of its residing position, and the granularity of the particle of the zone stop that radius is big more is also big more.If the axial velocity of this point upwards when particle rests on concrete radius in centrifugal force and the mutual balance of viscosity resistance and moves in a circle; Eddy flow was finally discharged from overfall with the form of overflow in then this particle got into; If this axial velocity is downward; Then the outer eddy flow of the final entering of this particle is discharged from underflow opening with the form of underflow, and when the axial velocity of this point was zero just, then this particle got into overflow, 50% according to probability 50% and gets into underflow theoretically; And the granularity of this particle is exactly the corresponding partition size of cyclone, and the natural separating interface of cyclone overflow just of the residing periphery of this particle and underflow.Be a point along this interface of radial direction theoretically, the particle size beyond this point all is greater than the corresponding particle size of this point, and this granularity with interior particle will be less than the granularity of this some place particle.But in the cyclone operate as normal; Because the fluctuation of cyclone inlet hydraulic and the fluctuation of radial velocity, in radial direction eddy flow with outside the separation of eddy flow often be not a desirable point, but the interval of a fluctuation; In this interval; Possibly should get into the particle of the coarsegrain of the underflow overflow the inside of can fluctuating, the particle that should get into the small grain size of the overflow equally underflow the inside of also can fluctuating, thus greatly reduce efficiency of hydrocyclone.This shows, want to improve efficiency of hydrocyclone, the fluctuation that reduces the inner separating medium of cyclone is crucial.And the key that reduces the fluctuation of separating interface is will guarantee cyclone tangential velocity and radial velocity stable.

Structurally there are following two problems in the hydrocyclone of the routine of in industry, using at present: it all is to adopt folk prescription to the tangential direction structure that the hydrocyclone that uses is gone up in industry at first at present; The structure of feed flow pipeline that adopted such feed liquor designs simplification; The velocity field of this single-screw distribution of shapes has been aggravated the fluctuation of separating interface greatly, thereby has reduced the due separative efficiency of cyclone; In addition, the fluctuation that used hydrocyclone hydraulic coupling is gone up in industry at present directly causes the fluctuation of interior three-dimensional speed, thereby can aggravate the fluctuation of separating interface.

The utility model content

The utility model provides a kind of separator of hydraulic cyclone efficiently to the deficiency of prior art.

A kind of separator of hydraulic cyclone efficiently comprises the feed tube group (2) of hydrocyclone body (1) and two-way axially symmetric structure; The feed tube group (2) of two-way axially symmetric structure comprises two feed tubes; Two feed tube axial symmetry; Two axisymmetric feed tubes are connected with the stable-pressure device that is built-in with the air bag (3) with parallel way; Be built-in with on the stable-pressure device (3) of air bag Pressure gauge (4) is installed, variable pump (8) is connected with the stable-pressure device that is built-in with the air bag (3) through pressure regulator valve (6), flowmeter (5), and overflow pipe is introduced liquid-return box through overflow liquid back pipe group (7) with overflow.

In the time of whole device work,, regulate liquid supply pressure through pressure regulator valve according to the specific requirement of centrifugation liquid supply pressure; Make the stable-pressure device internal pressure equal inlet hydraulic, the locking pressure regulator valve, this moment kinetic pump through stable-pressure device to two-way axisymmetric feed tube with the constant compression force feed flow; Because feed liquor tubular bidirectional axially symmetric structure; At this moment, hydrocyclone inside is a double-stranded flow field, and inlet hydraulic is stable basically; So the fluctuation of interior flow field is very little, so can improve efficiency of hydrocyclone greatly.

Description of drawings

Fig. 1 is the operation principle sketch map of the single unit system of the utility model.Among the figure: 1. two-way axial symmetry feed liquor structure cyclone body, the 2. feed tube group of two-way axially symmetric structure, 3. stable-pressure device, 4. Pressure gauge, 5. flowmeter, 6. pressure regulator valve, 7. overflow liquid back pipe group, 8. variable pump.

Fig. 2 is the feed tube axially symmetric structure sketch map of two-way axial symmetry feed liquor structure cyclone.

The specific embodiment

Below in conjunction with specific embodiment, the utility model is elaborated.

With reference to figure 1 and Fig. 2, the separator of hydraulic cyclone efficiently that the utility model is related comprises the feed tube group 2 of hydrocyclone body 1 and two-way axially symmetric structure; The feed tube group 2 of two-way axially symmetric structure comprises two feed tubes; Two feed tube axial symmetry; Two axisymmetric feed tubes are connected with the stable-pressure device that is built-in with the air bag 3 with parallel way, be built-in with on the stable-pressure device 3 of air bag Pressure gauge 4 is installed, and can directly show the stable-pressure device internal pressure; Variable pump 8 is connected with the stable-pressure device that is built-in with the air bag 3 through pressure regulator valve 6, flowmeter 5, and overflow pipe is introduced liquid-return box through overflow liquid back pipe group 7 with overflow.

Two feed tubes structure, size and with the connecting mode of cyclone body on all just the same; And two groups of symmetrical fully feed tubes are wanted to connect with stable-pressure device 3 through feed tube group 2; Guaranteed that two feed tubes think the inner feed flow of cyclone with identical pressure; Thereby reduced the fluctuation of cyclone interior flow field radial velocity greatly, improved efficiency of hydrocyclone; Stable-pressure device 3 is built-in with and is filled with compressed-air actuated air bag; Compressed air in the air bag can play the effect of voltage stabilizing to the pressure oscillation of kinetic pump 8; Thereby guaranteed the stable of two inlet liquid supply pressures of cyclone; Thereby reduced the fluctuation of the inner tangential velocity of cyclone, thereby improved efficiency of hydrocyclone.

The concrete operation principle of the utility model is following:

In the time of the utility model work; At first start variable kinetic pump 8; And,, make the flow of flowmeter 5 just in time equal the flow of job requirement through the flow of regulated variable pump 8 according to the requirement of detached job condition of work; And then adjusting pressure regulator valve 6; Make Pressure gauge 4 show that pressure equal the liquid supply pressure of detached job requirement, at this moment, kinetic pump 8 through stable-pressure device 3 buffering voltage stabilizings after feed tube group 2 to the separating medium of the stable input certain pressure of two-way axial symmetry feed liquor structure cyclone body 1; Separating medium is done stable double helix combined vortex motion in the cyclone inside of two-way feed liquor structure; Tangential velocity, radial velocity fluctuate very little, so eddy flow is also little than traditional strength cyclone interior flow field fluctuation with the fluctuation at outward turning flow point interface in foregoing, so the utility model can improve efficiency of hydrocyclone greatly.

Analysis according to the front; The feed tube of the two-way axially symmetric structure that the strength cyclone that the utility model relates to adopts; Change into symmetrical double-stranded combined vortex to the combined vortex of original single-screw shape, greatly reduce the fluctuation of radial velocity, thereby improve efficiency of hydrocyclone; Equally; Analysis according to the front; The stable-pressure device that the cyclone that the utility model relates to adopts makes the inlet liquid supply pressure more stable, thereby the interior flow field tangential velocity that guarantees is stable; Further reduce the fluctuation of interior flow field, thereby further improved the separating effect of hydrocyclone.

Should be understood that, concerning those of ordinary skills, can improve or conversion, and all these improvement and conversion all should belong to the protection domain of the utility model accompanying claims according to above-mentioned explanation.

Claims

1. a high-performance hydraulic cyclone separator is characterized in that, comprises the feed tube group (2) of hydrocyclone body (1) and two-way axially symmetric structure; The feed tube group (2) of two-way axially symmetric structure comprises two feed tubes; Two feed tube axial symmetry; Two axisymmetric feed tubes are connected with the stable-pressure device that is built-in with the air bag (3) with parallel way; Be built-in with on the stable-pressure device (3) of air bag Pressure gauge (4) is installed, variable pump (8) is connected with the stable-pressure device that is built-in with the air bag (3) through pressure regulator valve (6), flowmeter (5), and overflow pipe is introduced liquid-return box through overflow liquid back pipe group (7) with overflow.