RU2768410C1 - Centrifugal gas-liquid separator - Google Patents

Abstract

FIELD: gas, oil, petrochemical, energy industries.

SUBSTANCE: invention is intended for the separation of gas-liquid mixtures and can be used at gas, oil, petrochemical, energy industries and in other industries. The centrifugal gas-liquid separator contains a vertical housing with a cover and a bottom, a tangential inlet of a gas-liquid mixture, a gas duct, a gas outlet pipe, a shaft kinematically connected to an electric motor. The bottom is made of spherical or conical shape. Below the inlet of the gas-liquid mixture, there is a guide of a similar spherical or conical shape, and the shaft is equipped with at least one impeller, providing additional acceleration of the gas-liquid mixture flow for intensive separation. Seals are installed on the shaft. The released gas after separation rises to the upper part of the separator body along the gas duct, where it enters the gas outlet pipe located in the separator cover through the side holes in the upper part of the gas duct.

EFFECT: increasing the efficiency of cleaning liquid from gas.

3 cl, 2 dwg

Description

The invention is intended for the separation of gas-liquid mixtures and can be used at gas, oil, petrochemical, energy industries and in other industries.

Known centrifugal gas-liquid separator containing, a vertical housing with a lid and a bottom, installed in the housing cage, made of the upper cylindrical part and the lower conical, equipped with a coaxial pipe, tangential input of the gas-liquid mixture passing through the housing into the inner cavity of the cage, the gas outlet pipe connected to the inner cavity of the cage using a gas outlet pipe passing through the housing cover, a liquid outlet pipe communicated with the housing bottom (RF Patent No. 2311945, IPC B01D 45/12, 2007).

The disadvantage of this centrifugal gas-liquid separator is the low efficiency of gas separation, especially with a large flow of gas-liquid mixture.

The closest and accepted for the prototype is a centrifugal gas-liquid separator containing a vertical housing with a lid and a bottom, a tangential input of a gas-liquid mixture, a gas duct, a gas outlet pipe passing through the housing cover, a liquid outlet pipe connected with the housing near its bottom, a screw with the possibility of rotation by means of shaft kinematically connected to the electric motor (RF Patent No. 2433855, IPC B01D 45/12, 11/20/2011).

The disadvantage of this centrifugal gas-liquid separator is the low separation efficiency, the complexity of manufacturing the structure, due to the large number of components and parts, the complex gas outlet system, thereby leading to low separation efficiency, the laboriousness of repair work.

The technical task is to create a centrifugal gas-liquid separator that provides effective purification of liquid from gas at increased feeds of the gas-liquid mixture.

The technical result is to increase the efficiency of cleaning the liquid flow from gas due to the use of impellers in the design of the separator and the hermetic design of the separator due to shaft seals.

The problem is solved, and the technical result is achieved due to the fact that a centrifugal gas-liquid separator containing a vertical body with a cover and a bottom, a tangential inlet of a gas-liquid mixture, a gas duct, a gas outlet pipe, a shaft kinematically connected to the electric motor, while the bottom is made of a spherical or conical shape , below the input of the gas-liquid mixture there is a guide of a similar spherical or conical shape, and the shaft is equipped with at least one impeller, providing additional acceleration of the gas-liquid mixture flow for intensive separation, while seals are installed on the shaft, and the released gas after separation rises to the upper part of the housing separator through the gas duct, where through the side holes in the upper part of the gas duct it enters the gas outlet pipe located in the separator cover.

To increase the level of maintainability in the design of the separator, the shaft with at least one impeller installed on it, seals and the gas duct can be made of a cartridge type, thereby there is no need to remove the separator cover and disconnect the pipeline from the separator branch pipes, which simplifies the process of repair work.

The technical result is also achieved due to the fact that the centrifugal gas-liquid separator can be made in the following design, in which the separator is installed directly on the container. To do this, the bottom of the separator, having an opening in its lower part, is made with the possibility of fastening to the neck of the container by means of a flange connection.

The invention is illustrated by the following figures:

Fig. 1 shows the design of a centrifugal gas-liquid separator.

Fig. 2 - shows the design of a centrifugal gas-liquid separator with installation on the tank.

The claimed device includes:

1. Body

2. Lid

3. Pipe for inlet of gas-liquid mixture

4. Gas outlet

5. Electric motor

6. Fluid outlet

7. Impeller

8. Shaft

9. Gas duct

10. Impeller

11. Shaft seals

12. Bottom

13. Capacity

The centrifugal gas-liquid separator contains a vertical housing 1 with a cover 2 installed on it, and a bottom 12 having a spherical or conical shape, an electric motor 5 is installed on the cover 2, the electric motor 5 is kinematically connected to the shaft 8, on which the impellers 7 and 10 are installed in the tapering part the bottom 12 and the spherical or conical guide of the housing 1. The tightness of the separator is ensured by the shaft seal 11 mounted on the shaft 8. In the housing 1 above the impeller 7 there is a gas duct 9, inside which the shaft 8 passes, in the upper part of the gas duct 9 holes are made on the side surface for gas outlet. In the lower part of the bottom 12 there is a branch pipe 6 for liquid output.

Centrifugal gas-liquid separator operates as follows.

The gas-liquid mixture enters through the inlet pipe 3, tangentially installed in the upper part of the housing 1.

The first stage of separation takes place in a curved space formed by the wall of the housing 1. The flow of the gas-liquid mixture is thrown by centrifugal force onto the wall of the housing 1 of the separator and under the action of gravitational forces in the course of rotation of the flow along the downward spiral of the conical guide of the housing 1 moves to the second separation stage. In this case, the released gas rushes to the center, where it rises to the upper part of the separator and is discharged through the gas outlet pipe 4.

The second stage of separation is carried out using the impeller 7, which reports the circular motion of the gas-liquid mixture. As a result of the emerging centrifugal force, the gas-liquid mixture from the center of the impeller 7 moves to the outer outlet, and the vacated space is again filled with the gas-liquid mixture coming from the inlet pipe 3. After leaving the first impeller 7, the gas-liquid mixture, having received acceleration energy, rushes to the periphery, being divided into free gas and degassed liquid. Under the action of gravitational forces, the pumped liquid rushes to the second impeller 10.

The third stage of separation is carried out with the help of the second impeller 10, which gives additional acceleration to the rotation of the fluid flow coming from the first impeller 7, and due to the narrowing part of the bottom 12, as a result of which there is an accelerated rotation of the liquid during which the remaining gas is released from the liquid.

The released gas (dotted arrows) in the process of the second and third separation stages rises to the upper part of the housing 1 through the gas duct 9, where it enters the gas outlet pipe 4 located in the cover 2 through the side holes in the upper part of the gas duct 9 and is discharged from the separator.

The degassed liquid after passing through all separation stages is removed from the separator through the pipe 6 for the liquid outlet into the pipeline for further transportation, and when the separator is installed directly on the tank, the degassed liquid enters directly into the tank.

Claims (4)

1. A centrifugal gas-liquid separator containing a vertical housing with a cover and a bottom, a tangential inlet of a gas-liquid mixture, a gas duct, a gas outlet pipe, a shaft kinematically connected to an electric motor, characterized in that the bottom is made of a spherical or conical shape, a guide of a similar spherical or conical shape is placed below the inlet of the gas-liquid mixture, and the shaft is equipped with at least one impeller, providing additional acceleration of the gas-liquid mixture flow for intensive separation, while seals are installed on the shaft. 2. Centrifugal gas-liquid separator according to claim 1, characterized in that the separator shaft with at least one impeller, seals and flue is made of cartridge type. 3. Centrifugal gas-liquid separator according to paragraphs. 1, 2, characterized in that the bottom of the separator is made with the possibility of installation on the container by means of a flange connection.

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