CN2438508Y

CN2438508Y - Hydrocyclone with screw double-curve overflow pipe structure

Info

Publication number: CN2438508Y
Application number: CN 00243651
Authority: CN
Inventors: 王振波; 郭颖; 金有海
Original assignee: China University of Petroleum East China
Current assignee: China University of Petroleum East China
Priority date: 2000-07-21
Filing date: 2000-07-21
Publication date: 2001-07-11
Anticipated expiration: 2010-07-21

Abstract

The utility model discloses a high efficiency hydraulic cyclone which belongs to a separating device for liquid-solid and liquid-liquid. The utility model is composed of a feed pipe, an overflow pipe, a cylindrical body, a conical body, and an underfow pipe and is characterized in that the upper part of the overflow pipe has a helical structure, and the outer wall at the bottom has a double-curved surface structure. The utility model has the advantages that the phenomena of overflow and coarse granule escape of the ordinary hydraulic cyclone are lightened; granules entering an inner cyclonic flow have an opportunity to return back to an outer cyclonic flow, and the secondary separation is intensified; the phenomenon that the disturbance of part of a flow field occurs at an inlet of the overflow pipe because of the thickness of the pipe wall of the overflow pipe is eliminated; the operating flexibility is large, and the separating performance is more reliable. The utility model is suitable for the separation of liquid and solid, liquid and liquid, and liquid and gas in the industries of petroleum, chemical engineering, environmental protection, medicine, foodstuff, etc. and particularly for occasions with high requirements for the separation of fine granules.

Description

Hydrocyclone with spiral hyperboloid overflow pipe structure

The utility model relates to the liquid one solid, liquid one liquid two water power cyclone that is separated.

Simple in structure, the convenient operating maintenance of hydrocyclone is widely used a kind of equipment in the separation process of liquid solid, liquid liquid.Present widely used hydrocyclone is formed by tangential admission mouth, overflow pipe, shell of column, cone and underflow opening, and the overflow pipe that wherein inserts the shell of column part is generally cylindricality.Because the distribution relation of cyclone internal pressure field, the overflow pipe outer wall is smooth in addition, and in the hydrocyclone course of work, inside inevitably exists short-circuit flow, drains through overflow pipe thereby make many heavy phase particles just directly enter overfall without separation.

At present, people generally adopt the heavy wall overflow pipe to reduce short-circuit flow and improve separative efficiency.Yet test shows, even adopt heavy wall overflow pipe structure, because the distribution relation of cyclone internal pressure field still has a large amount of heavy phase particles and drains with short-circuit flow.And when adopting common heavy wall overflow pipe, mouth (overfall inside diameter D at the bottom of the upstream in the cyclone arrives overflow pipe ₀) after, because the existence of overflow pipe wall thickness, radius is greater than D ₀Upstream in/2 the zone can impact overflow pipe bottom anchor ring (flow velocity is higher), causes the disorder of local flow field; The stability in eddy flow flow field in can having influence on again simultaneously, thus efficiency of hydrocyclone greatly influenced, especially true for small diameter cyclone.

The purpose of this utility model is to avoid the weak point of above-mentioned phenomenon, and a kind of interior media good fluidity, separative efficiency height and the big hydrocyclone of operating flexibility are provided.

The purpose of this utility model realizes by following measure: hydrocyclone is made of charging aperture, overflow pipe, cylindrical shell, awl section, underflow opening etc., and charging aperture is along shell of column upper limb arranged tangential.It is characterized in that on the top of overflow pipe being that helical structure, bottom are the hyperboloid structure.

Accompanying drawing 1 is the utility model cyclone full sectional view;

Accompanying drawing 2 is A-A profiles on the accompanying drawing 1;

Accompanying drawing 3 is spiral+hyperboloid overflow pipe full sectional views;

Accompanying drawing 4 is B-B profiles on the accompanying drawing 3.

Below in conjunction with accompanying drawing, structure of the present utility model and work characteristics are described further:

The utility model is made of charging aperture, overflow pipe, cylindrical shell, awl section, underflow opening etc., and charging aperture is along cylinder section upper limb arranged tangential; The initiating terminal I place of overflow pipe top helicoid a and the upper limb of charging aperture 1 is tangent, outer ring surface and cylinder inboard wall (diameter is D) closely cooperate, tail end II place terminates in charging aperture 1 one sides; Bottom hyperboloid structure is positioned at the charging aperture downside, and wherein top-surface camber b is concave curved surface down, and lower surface camber c is last concave curved surface, and last lower surface camber is circular arc or hyperbola around cyclone axis rotation formation.

During work, mixed liquor tangentially enters cyclone cylindrical shell 2 at a high speed by charging aperture 1, forms a centrifugal force field of rotating at a high speed in cyclone.Wherein heavy phase is descending in the effect lower edge of centrifugal force field and axial thrust awl section 3, is discharged by underflow opening 4, and light phase is then discharged by overfall 5.

1. the helical structure on overflow pipe top design can give its inner medium one axial thrust at the cyclone entrance, increases the axial migration velocity of medium, thereby reduces the existence of cyclone inner annular eddy current, reduces the cyclone energy consumption.This kind structural design also can strengthen the discharge ability of cyclone underflow opening simultaneously, reduces the generation of cyclone underflow opening clogging.

2. the design of overflow pipe bottom curved surface b, make caping limit wall stream in the process descending along overflow pipe, change to flow to and to reenter outward turning stream and carry out two and be separated, thereby the short-circuit flow flow that enters overflow is significantly reduced, thick phenomenon is run in the overflow that has alleviated greatly in the common hydrocyclone; Simultaneously, top-surface camber is the design of streamline shape, makes limit wall stream can remain mobile stability during eddy flow outside reentering.

The design of overflow pipe bottom curved surface b avoided since upstream to the impact of overflow pipe bottom anchor ring, near the disorderly phenomenon of the local flow field that is produced mouth at the bottom of the overflow pipe has kept the stability of cyclone interior flow field; Make greater than D ₀Upstream in/2 zones reenters outer eddy flow smoothly, has strengthened the secondary separation of fine particle.Simultaneously, two curved surface b, c fit applications up and down, upstream can effectively hinder flowing of short-circuit flow again when reentering outward turning stream and carrying out secondary separation, also reduced overflow to a certain extent and run thick.

Use advantage of the present utility model mainly to be:

1. separative efficiency is higher, is particularly suitable for the capture of fine particle. Testing indoor 325 order talcum powder advances The row test shows: under same pressure drop condition, efficient more common (heavy wall) cyclone can improve 5～10 percentages The point.

2. operating flexibility is big, separating property is reliable.Change under the bigger situation in inlet flow rate (inlet flow velocity), input concentration, feed size distribution etc., can both keep higher separative efficiency.

3. simple in structure, processing, transformation realize easily.The liquid solid, liquid liquid that can be widely used in industries such as oil, chemical industry, environmental protection, medicine, food separates and gas solid separation, is particularly useful for the occasion high to the fine particle separation requirement.

Claims

1. an efficient hydrocyclone comprises tangential entry (1), cylindrical shell (2), cone (3), underflow opening (4) and overflow pipe (5) etc., and it is characterized in that: described cyclone overflow pipe top is helical structure, and the bottom is the hyperboloid structure.

2. hydrocyclone as claimed in claim 1 is characterized in that in the hyperboloid of overflow pipe bottom, and top-surface camber is concave curved surface, and lower surface camber is a concave curved surface on; Last lower surface camber is formed around the rotation of cyclone axis by two sections circular arc lines or hyperbola.