CN109290075B - Hydraulic cyclone separation device based on particle size selection - Google Patents

Hydraulic cyclone separation device based on particle size selection Download PDF

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Publication number
CN109290075B
CN109290075B CN201811002039.1A CN201811002039A CN109290075B CN 109290075 B CN109290075 B CN 109290075B CN 201811002039 A CN201811002039 A CN 201811002039A CN 109290075 B CN109290075 B CN 109290075B
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China
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layer
pipe
overflow pipe
tangential
underflow
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CN201811002039.1A
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Chinese (zh)
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CN109290075A (en
Inventor
赵立新
宋民航
杨宏燕
刘琳
徐保蕊
蒋明虎
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东北石油大学
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B04CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04CAPPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00Apparatus in which the axial direction of the vortex is reversed
    • B04C5/24Multiple arrangement thereof
    • B04C5/28Multiple arrangement thereof for parallel flow
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B04CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04CAPPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00Apparatus in which the axial direction of the vortex is reversed
    • B04C5/02Construction of inlets by which the vortex flow is generated, e.g. tangential admission, the fluid flow being forced to follow a downward path by spirally wound bulkheads, or with slightly downwardly-directed tangential admission
    • B04C5/04Tangential inlets
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B04CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04CAPPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00Apparatus in which the axial direction of the vortex is reversed
    • B04C5/08Vortex chamber constructions

Abstract

A hydrocyclone separation device based on particle size selection. The device comprises an outer layer cyclone cylinder, an outer layer conical cylinder, an outer layer underflow pipe, an outer layer overflow pipe, an inner layer cyclone cylinder, an inner layer conical cylinder, an inner layer underflow pipe and an inner layer overflow pipe; the device also comprises an inlet and an elbow; the inlet is connected with the inlet end of the elbow pipe along the vertical direction; a central sealing baffle is arranged in the outlet end of the elbow, the central sealing baffle divides the outlet end of the elbow into two parallel cavities which are not communicated with each other, and the two parallel cavities are respectively an outer layer tangential inlet and an inner layer tangential inlet; the inner layer cyclone cylinder is connected with the inner layer tangential inlet along the tangential direction, and the outer layer cyclone cylinder is connected with the outer layer tangential inlet along the tangential direction; the outlet directions of the inner layer overflow pipe and the outer layer overflow pipe are along the axial directions of the inner layer overflow pipe and the outer layer overflow pipe. The cyclone separator has high separation efficiency on dispersed phases with different particle sizes in the treatment fluid, so that the overall efficiency of cyclone separation is improved.

Description

Hydraulic cyclone separation device based on particle size selection

Technical Field

The invention relates to a cyclone separator in the technical field of two-phase separation, which can be applied to the fields of petroleum, chemical industry, environmental protection and the like.

Background

At present, the rapid separation method for two-phase immiscible media mainly comprises air flotation, filtration, membrane separation, cyclone separation and the like. The air flotation method is suitable for the small range of the variation of the concentration of the disperse phase; the filtration can better realize the separation of two phases, but frequent back washing is needed to ensure the long-term stable operation of the equipment; the membrane separation equipment has higher cost and stricter requirements on medium conditions. The cyclone separation has the advantages of small equipment volume and the like, the separation principle is that centrifugal separation is carried out by utilizing the density difference between immiscible media, the larger the density difference is, the larger the particle size of a disperse phase is, and the better the separation effect is relatively. At present, the cyclone separator is applied to the fields of petroleum exploitation, chemical engineering, food processing, environmental protection and the like which relate to the separation of immiscible multiphase media to a certain extent, but the cyclone separator has the defects of increasing the burden of subsequent separation treatment cost due to the problems of poor removal effect on fine particles or liquid drops and the like.

Disclosure of Invention

In order to solve the technical problems mentioned in the background technology, the invention provides a hydraulic cyclone separation device based on particle size selection, which has higher separation efficiency for large-particle-size particles and small-particle-size particles or liquid drops and has the outstanding advantages of high separation efficiency, small equipment volume, pre-separation of treatment liquid, inner-layer and outer-layer cyclone separation and the like.

The technical scheme of the invention is as follows: this kind of hydrocyclone separation device based on particle size selection, including the outer whirl section of thick bamboo, outer awl section of thick bamboo, outer underflow pipe and the outer overflow pipe that has the upper cover that connects in order, the cavity that forms after outer whirl section of thick bamboo, outer awl section of thick bamboo and outer underflow pipe are connected is outer whirl chamber, its unique is characterized in that:

the hydraulic cyclone separation device also comprises an inner layer cyclone cylinder with an upper cylinder cover, an inner layer conical cylinder, an inner layer underflow pipe and an inner layer overflow pipe; the inner layer swirl tube, the inner layer conical tube and the inner layer underflow tube are sequentially connected and then are positioned in the outer layer swirl cavity, and an inner cavity formed after the inner layer swirl tube, the inner layer conical tube and the inner layer underflow tube are sequentially connected is an inner layer swirl cavity; the inner overflow pipe is positioned in the inner underflow pipe and connected through the rib plate, the top end of the inner overflow pipe is positioned in the inner conical cylinder, and the tail end of the inner overflow pipe extends out of the outer overflow pipe.

The upper cover of the inner layer rotational flow cylinder protrudes out of the upper cover of the outer layer rotational flow cylinder.

The hydrocyclone separation device also comprises an inlet and an elbow; the inlet is connected with the inlet end of the elbow pipe along the vertical direction; a central sealing baffle is arranged in the outlet end of the elbow, the outlet end of the elbow is divided into two parallel cavities which are not communicated with each other by the central sealing baffle, and the two parallel cavities are respectively an outer layer tangential inlet and an inner layer tangential inlet; the inner layer cyclone cylinder is connected with the inner layer tangential inlet along the tangential direction, and the outer layer cyclone cylinder is connected with the outer layer tangential inlet along the tangential direction.

The outlet directions of the inner layer overflow pipe and the outer layer overflow pipe are along the axial directions of the inner layer overflow pipe and the outer layer overflow pipe; the outlets of the inner underflow pipe and the outer underflow pipe are tangential outlets, namely the tangential outlets of the outer underflow pipe are connected with the outer underflow pipe along the tangential direction, and the tangential outlets of the inner underflow pipe penetrate through the outer overflow pipe to be connected with the inner underflow pipe along the tangential direction.

The invention has the following beneficial effects: when the separation device is used for separating the immiscible two-phase treatment liquid with density difference, the treatment liquid enters from the inlet and is pre-separated into liquid flow rich in large-particle-size particles and liquid flow rich in small-particle-size particles under the inertial separation action of the bent pipe. Liquid flow rich in small-particle-size particles enters the inner-layer vortex cavity along the inner-layer tangential inlet and forms high-speed rotating flow, the small-particle-size particles are thrown to the position close to the inner wall of the inner-layer vortex cavity under the action of centrifugal force and are collected in an annular space between the inner-layer overflow pipe and the inner-layer underflow pipe to be discharged downwards, and light phase water is collected in a vortex central area and is discharged downwards through the inner-layer overflow pipe; liquid flow rich in large-particle-size particles enters the outer cyclone cavity along the outer tangential inlet to form high-speed rotational flow, the large-particle-size particles are thrown to the area near the inner wall of the outer cyclone cavity under the action of centrifugal force and are discharged downwards along the annular space between the outer overflow pipe and the outer underflow pipe, and light phase water is concentrated on the outer walls of the inner cyclone pipe, the inner cone section and the inner underflow pipe and is transported downwards and finally discharged downwards through the annular space between the inner underflow pipe and the outer overflow pipe.

The separator combines the thought of inlet treatment liquid pre-inertia separation and cyclone separation, realizes the relatively high separation efficiency of particles or liquid drops with different particle sizes in the treatment liquid, and improves the overall efficiency of cyclone separation. In addition, the separator can be used for separating two immiscible phases with density difference. The method can be applied to the fields of oil field and chemical production, municipal environmental protection and the like, and has considerable popularization and application prospects.

Description of the drawings:

FIG. 1 is a schematic longitudinal sectional view of the present invention.

Fig. 2 is a schematic perspective view of the present invention.

Fig. 3 is a front view of the present invention.

Fig. 4 is a top view of the present invention.

FIG. 5 is a schematic view of the cross-sectional structure of the present invention taken along line B-B.

FIG. 6 is a schematic diagram of the cyclone separation based on particle size selective separation of the present invention.

Fig. 7 is a schematic structural diagram of an arrangement form of a 180-degree elbow pipe at an inlet.

Fig. 8 is a schematic structural diagram of an arrangement form adopting a spiral bent pipe at an inlet.

FIG. 9 is a three-dimensional partial cross-sectional view of the inlet of the present invention.

FIG. 10 is a three-dimensional partial cross-sectional view of the outlet of the present invention.

FIG. 1-inner overflow tube; 2-outer overflow pipe; 3-outer underflow pipe; 4-inner underflow pipe; 5-outer layer conical cylinder; 6-inner layer cone; 7-outer layer cyclone cylinder; 8-inner layer cyclone cylinder; 9-outer layer tangential inlet; 10-inner tangential inlet; 11-bending a pipe; 12-an inlet; 13-tangential outlet of outer underflow pipe; 14-tangential outlet of inner underflow pipe; 15-a liquid stream rich in large particle size particles; 16-a liquid stream rich in small particle size particles.

The specific implementation mode is as follows:

the invention will be further described with reference to the accompanying drawings in which:

if it is desired to achieve efficient separation of a portion of fine particles or droplets, it is necessary to increase the centrifugal force to which the fine particles or droplets are subjected during the cyclonic separation, i.e., to subject the dispersed phase to a greater radial migration force.

Based on the above reasons, the technical scheme is that the hydraulic cyclone separation device based on particle size selection comprises an outer layer cyclone cylinder 7 with an upper cylinder cover, an outer layer conical cylinder 5, an outer layer underflow pipe 3 and an outer layer overflow pipe 2 which are connected in sequence, wherein a cavity formed after the outer layer cyclone cylinder, the outer layer conical cylinder and the outer layer underflow pipe are connected is an outer layer cyclone cavity. The unique character lies in:

the hydraulic cyclone separation device also comprises an inner layer cyclone cylinder 8 with an upper cylinder cover, an inner layer conical cylinder 6, an inner layer underflow pipe 4 and an inner layer overflow pipe 1; the inner layer cyclone cylinder 8, the inner layer conical cylinder 6 and the inner layer underflow pipe 4 are sequentially connected and then are positioned in the outer layer cyclone cavity, and an inner cavity formed after the inner layer cyclone cylinder 8, the inner layer conical cylinder 6 and the inner layer underflow pipe 4 are sequentially connected is an inner layer cyclone cavity; the inner layer overflow pipe 1 is positioned in the inner layer underflow pipe 4 and connected through a rib plate, the top end of the inner layer overflow pipe 1 is positioned in the inner layer conical barrel 6, and the tail end of the inner layer overflow pipe 1 extends out of the outer layer overflow pipe.

The upper cover of the inner layer rotational flow cylinder 8 protrudes out of the upper cover of the outer layer rotational flow cylinder 7.

The hydrocyclone separation device also comprises an inlet 12 and an elbow 11; the inlet 12 is connected with the inlet end of the elbow pipe 11 along the vertical direction; a central sealing baffle is arranged in the outlet end of the elbow pipe 11, the outlet end of the elbow pipe is divided into two parallel cavities which are not communicated with each other by the central sealing baffle, and the two parallel cavities are an outer-layer tangential inlet 9 and an inner-layer tangential inlet 10 respectively; the inner layer cyclone cylinder 8 is tangentially connected with an inner layer tangential inlet 10, and the outer layer cyclone cylinder 7 is tangentially connected with an outer layer tangential inlet 9.

The outlet directions of the inner layer overflow pipe 1 and the outer layer overflow pipe 2 are both along the axial directions of the inner layer overflow pipe and the outer layer overflow pipe; the outlets of the inner underflow pipe and the outer underflow pipe are tangential outlets, namely, the tangential outlet 13 of the outer underflow pipe is connected with the outer underflow pipe 3 along the tangential direction, and the tangential outlet 14 of the inner underflow pipe penetrates through the outer overflow pipe 2 to be connected with the inner underflow pipe 4 along the tangential direction.

In specific implementation, the bent pipe 11 may be a 90 ° bent pipe, a 180 ° bent pipe, or a spiral bent pipe.

Because, the inlet is connected with the elbow; after passing through the bent pipe, the liquid flow respectively enters the outer layer tangential inlet and the inner layer tangential inlet; the inner layer vortex cavity and the inner layer conical section are respectively positioned inside the outer layer vortex cavity and the outer layer conical section, the inner layer vortex cavity protrudes out of the outer layer vortex cavity by one section, and the protruding section of the inner layer vortex cavity is connected with the inner layer tangential inlet along the tangential direction; the outer tangential inlet is tangentially connected to the outer vortex chamber 7. The outlet part of the invention adopts a four-layer sleeve structure and sequentially comprises an inner-layer overflow pipe, an inner-layer underflow pipe, an outer-layer overflow pipe and an outer-layer underflow pipe from inside to outside.

When the device is used specifically, the immiscible two-phase treatment liquid with the density difference takes the solid-phase treatment liquid and the liquid-phase treatment liquid as an example, the treatment liquid enters from an inlet, firstly passes through the elbow and is subjected to the inertia separation effect, large-particle-size particles mainly gather to flow at the outer wall of the elbow in the steering process due to large self inertia, small-particle-size particles have good following performance with liquid flow due to small self inertia, and the flowing state of the particles is slightly influenced by the structural change of the elbow, so that the solid-phase treatment liquid and the liquid-phase treatment liquid are pre-separated into the liquid flow 15 rich in the large-particle-size particles and the liquid flow 16 rich in the small-particle-size particles through the arrangement of the elbow.

An outer layer tangential inlet 9 and an inner layer tangential inlet 10 are respectively arranged at the corresponding positions of the liquid flow 15 rich in large-size particles and the liquid flow 16 rich in small-size particles. The liquid flow 16 rich in small-particle-size particles enters the inner-layer rotational flow cavity 8 along the inner-layer tangential inlet 10 and forms high-speed rotational flow, the diameter of the inner-layer rotational flow cavity 8 is small, so that the rotational centrifugal force applied to the small-particle-size particles is greatly increased, the separation of the small-particle-size particles is promoted, and the separation efficiency of the small-particle-size particles is improved. In addition, the inner-layer conical section 6 is favorable for compensating the speed loss of the rotating fluid in the cyclone separation process and is favorable for separating two phases. Small-particle-size particles are thrown to the vicinity of the inner wall of the inner-layer vortex cavity 8 under the action of centrifugal force, are concentrated in an annular space between the inner-layer overflow pipe 1 and the inner-layer underflow pipe 4 and are discharged downwards, and light phase water is concentrated in a vortex central area and is discharged downwards through the inner-layer overflow pipe 1; similarly, a liquid flow 15 rich in large-particle-size particles enters the outer layer vortex cavity 7 along the outer layer tangential inlet 9 to form high-speed rotating flow, although the diameter of the outer layer vortex cavity 7 is obviously larger than that of the inner layer vortex cavity 8, the particle phase in the outer layer vortex cavity 7 has large particle size, larger rotating centrifugal force can be ensured, the separation efficiency of the large-particle-size particles is higher, and meanwhile, the arrangement of the outer layer conical section 5 is beneficial to compensating the rotating fluid speed loss in the separation process and is beneficial to the separation of two phases. Large-particle-diameter particles are thrown to the area near the inner wall of the outer-layer vortex cavity 7 under the action of centrifugal force and are discharged downwards along the annular space between the outer-layer overflow pipe 2 and the outer-layer underflow pipe 3, and light phase water is concentrated on the outer walls of the inner-layer vortex pipe 8, the inner-layer conical section 6 and the inner-layer underflow pipe 4 and is finally discharged downwards through the annular space between the inner-layer underflow pipe 4 and the outer-layer overflow pipe 2. After the inner layer and the outer layer are subjected to cyclone separation, the two water-rich phase liquid flows flowing out of the inner layer overflow pipe 1 and the outer layer overflow pipe 2 are finally converged together and discharged along the axial direction from the bottom, and the two particle-rich phase liquid flows flowing out of the outer layer underflow pipe 3 and the inner layer underflow pipe 4 are discharged along the tangential outlet 13 of the outer layer underflow pipe and the tangential outlet 14 of the inner layer underflow pipe respectively.

It should be noted that the present invention is suitable for separation of immiscible two phases with density difference, when the density of the dispersed phase in the treatment fluid is less than that of the continuous phase, the bending direction of the elbow at the inlet needs to be adjusted, taking the dispersed phase as oil drops and the continuous phase as water as an example, at this time, the bending direction of the elbow at the inlet needs to be changed, so that the inlet fluid flow enters from the clockwise direction to the counterclockwise direction, thereby after the inertial separation of the inlet elbow is realized, the fluid flow rich in oil drops with small particle size enters into the inner layer cyclone cavity from the inner layer tangential inlet, and the high-efficiency separation of the small liquid drops is realized.

Claims (1)

1. The utility model provides a water conservancy hydrocyclone separation device based on particle size selection, includes outer whirl section of thick bamboo (7), outer awl section of thick bamboo (5), outer underflow pipe (3) and outer overflow pipe (2) that have the upper cover that connect in order, and outer overflow pipe is located outer underflow pipe, and the top of outer overflow pipe is located outer awl section of thick bamboo, and outer underflow pipe is stretched out to the end of outer overflow pipe outside, the cavity that outer whirl section of thick bamboo, outer awl section of thick bamboo and outer underflow pipe formed after connecting is outer whirl chamber, its characterized in that:
the hydraulic cyclone separation device also comprises an inner layer cyclone cylinder (8) with an upper cylinder cover, an inner layer conical cylinder (6), an inner layer underflow pipe (4) and an inner layer overflow pipe (1); the inner-layer cyclone cylinder (8), the inner-layer conical cylinder (6) and the inner-layer underflow pipe (4) are sequentially connected and then are positioned in the outer-layer cyclone cavity, and an inner cavity formed after the inner-layer cyclone cylinder (8), the inner-layer conical cylinder (6) and the inner-layer underflow pipe (4) are sequentially connected is an inner-layer cyclone cavity; the inner overflow pipe (1) is positioned in the inner underflow pipe (4) and connected through a rib plate, the top end of the inner overflow pipe (1) is positioned in the inner conical cylinder (6), and the tail end of the inner overflow pipe (1) extends out of the outer overflow pipe;
the upper cover of the inner layer rotational flow cylinder (8) protrudes out of the upper cover of the outer layer rotational flow cylinder (7);
the hydrocyclone separation device also comprises an inlet (12) and an elbow (11); the inlet (12) is connected with the inlet end of the elbow (11) along the vertical direction; a central sealing baffle is arranged in the outlet end of the elbow pipe (11), the outlet end of the elbow pipe is divided into two parallel cavities which are not communicated with each other by the central sealing baffle, and the two parallel cavities are respectively an outer layer tangential inlet (9) and an inner layer tangential inlet (10); the inner layer cyclone cylinder (8) is tangentially connected with the inner layer tangential inlet (10), and the outer layer cyclone cylinder (7) is tangentially connected with the outer layer tangential inlet (9);
the outlet directions of the inner layer overflow pipe (1) and the outer layer overflow pipe (2) are along the axial directions of the inner layer overflow pipe and the outer layer overflow pipe; the outlets of the inner underflow pipe and the outer underflow pipe are tangential outlets, namely, the tangential outlet (13) of the outer underflow pipe is connected with the outer underflow pipe (3) along the tangential direction, and the tangential outlet (14) of the inner underflow pipe penetrates through the outer overflow pipe (2) to be connected with the inner underflow pipe (4) along the tangential direction.
CN201811002039.1A 2018-08-30 2018-08-30 Hydraulic cyclone separation device based on particle size selection CN109290075B (en)

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Application Number Priority Date Filing Date Title
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CN109290075B true CN109290075B (en) 2020-06-02

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3865242A (en) * 1972-12-15 1975-02-11 Combustion Eng Upstream classifier for a multi-separator
CN2275907Y (en) * 1996-10-16 1998-03-11 无锡市炼油设备厂 Combined high efficiency cyclone separator
CN101269356A (en) * 2007-03-19 2008-09-24 徐凯 Inner core acceleration type cyclone separator
CN101480636A (en) * 2009-01-05 2009-07-15 哈尔滨工业大学 Centrifugal subsidence mixed dirt remover
CN202064929U (en) * 2011-01-27 2011-12-07 中国石油天然气集团公司 Dynamic hydrocyclone for crude oil sand removal
CN202199443U (en) * 2011-08-31 2012-04-25 南宁吉然糖业技术有限公司 Flue gas spark separator for cluster-type boiler
CN202497957U (en) * 2012-02-28 2012-10-24 东方电气集团东方锅炉股份有限公司 Cyclone separator with double inlet passages
CN106493005B (en) * 2016-10-17 2019-01-25 东北石油大学 A kind of two-phase vortex separation system

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