RU1816472C - Apparatus for separating solid phase from liquid phase - Google Patents

Abstract

SUMMARY OF THE INVENTION: a device for separating a solid phase from a liquid comprises a screw placed vertically in the inner casing of the sump, the outer casing consists of cylindrical and conical parts. The auger is equipped with radial patches and a float fixed respectively in the upper and lower parts. The inner surface of the cylindrical part of the outer casing of the sump is provided with a screw baffle, and a circular vibration exciter is attached to the outer surface of the conical part of the casing. At. the inlet pipes are located in the upper part of the inner casing of the sump, and the outlet pipe in the upper part of the outer casing. 1 ill.

Description

The invention relates to the oil industry and can be used in systems for collecting and preparing oil, gas and water, as well as in other sectors of the national economy, where processes of separation of the solid phase from the liquid are used.

The purpose of the invention is to increase the efficiency of fuzz separation processes by utilizing the energy of the liquid phase and organizing the movement of the stream.

Such arrangement and execution of individual units allows increasing the efficiency of phase separation processes due to the fact that the flow supplied to the system device changes the direction of movement by 180 °. The centrifugal component of the driving force of the circular vibrations of the vibration exciter, for example hydraulic, also contributes to the separation and sedimentation of the solid phase. In this case, the angle of vibration, (the angle between the direction of vibration and normal to the axis of the settler) is preferably chosen equal to the angle of inclination of the screw j l of the partition, which is 10-20 ° with the angle of inclination of the screw turn.

Such a ratio of the angle of vibration and the angle of inclination of the turns of the screw baffle and the screw will ensure the intensification of the deposition of the solid phase on the surface of the turns of the screw and the solid particles deposited on the screw baffle to slide into the hopper. In addition, vibration directed against the flow in the screw baffle will prevent the main stream from passing through the intermediate layer of oil with the smallest (dcp 0.37 mm) sand particles to the outlet pipe.

The drawing shows a diagram of the device. means for separating the solid phase from the liquid. The device comprises a screw 1, which is placed vertically in the inner housing 2 of the sump formed by a cylindrical shell. The outer casing consists of a cylindrical 3 and conical 4

ate

WITH

00

CN

Јк

VI

N5

parts, and the cylindrical part is provided with a ring 5 to which the shell 2 is attached. The inner casing is equipped with two inlet pipes 6 and 7, which serve to supply liquid in the mode of separation of the solid phase from the liquid, and in the mode of cleaning the screw turns from sand, The screw is provided radially located blades 8 and a float 9, rigidly fixed vetno in its upper and lower parts. The screw contains a stop 10 at the bottom and is mounted on the outer support 11, and at the top is equipped with a stop 12, by means of which it is connected to the support 13 of the cover 14, which is mounted on the nozzle 15, which in turn is mounted on the cover 16, equipped with a gas discharge nozzle 17. In the upper part A liquid outlet pipe 18 is installed in the cylindrical outer casing of the sump 18. The inner surface of the cylindrical 3 part of the casing is provided with a screw guide 19, and a hydraulic vibration exciter 20 is attached to the outer surface of the conical part 4 of the casing x vibrations, to which the pipe 21 is connected, connected to the lower conical part of the housing.

The device operates as follows.

A liquid with suspended solids in it (for example, high-viscosity oil with sand particles) through a pipe b (or 7) enters the inner housing 2 of the sump and enters the radial blades 8. As the sump consisting of the bodies 2 is filled , 3 and 4, the screw 1 with the help of the float 9, located in the conical part 4, floats, after which it acquires a rotational movement due to the influence of the fluid flow through the blade 8. In this case, the lower stop of the screw 10 is detached from the lower support 11 and touches the upper support 12 with the upper focus 13. Pr feeding liquid through the nozzle 6 screw rotation occurs in the direction of flow - Mode separating solids from a liquid and sedimentation (operating mode),

When the flow is supplied through the nozzle 7, the screw rotates in the opposite direction - the displacement mode of the solid phase accumulated on the screw turns in the conical part 4.

The solid phase extracted by means of the screw from the inner cylindrical tank of the settler settles downward towards the conical part 4, and the liquid phase changes the direction of motion by 180 ° and enters the screw baffle 19 located in the precipitation channel formed by the inner surface of the cylindrical part 3 of the outer tank of the settler and inner case.

The liquid moves from bottom to top and is twisted in the opposite direction to the rotation of the flow along the turns of the screw in the operating mode (phase separation and settling mode). As a result of rotational motion, the liquid is freed from solid particles and is discharged through the nozzle 18. In this case, the conical

 part of the water is discharged through the pipe 21 and 0 falls on the hydraulic vibration exciter of circular vibrations 20. It should be emphasized that the circular vibrations of the vibration exciter 20 in the operating mode of the screw are directed in the direction of flow 5 in the turns of the screw 1, thereby contributing to the deposition of sand, and in the opposite - the movement the fluid flow through the screw baffle 19, thereby holding the lightweight intermediate layer - a mixture of 0 fluid with the smallest fractions of sand

 (dcp 0.37 mm), preventing it from rising along the helical partition and facilitating the deposition of fine sand fractions entrained in the liquid on the helical partition, and

5

displacement of settled particles into the conical part

4, Displacement is also provided by a tilt angle of the helical partition of 22.5-30 °. The gas released during the separation process is removed through the nozzle 17.

0 A prototype of the proposed device was manufactured.

The volume of the sump is 0.6 m3, the diameter of the hopper is 0.5 m with a taper angle of 45 °, the diameter of the auger body is 0.3 m. The screw parameters:

5, the number of turns n 10, the step of a turn of 0.15 m. The angle of inclination of the screw line of the screw 14 °. The angle of inclination of the screw guide is 30 °, and the pitch of the screw guide is 0.15 m. The device is made of 1 mm thick sheet. Screw

0 is equipped with 8 radial blades measuring 0.14 x 0.14 mm.

The experiments were carried out on highly viscous oils. Oil temperature 60 ° C, kinematic viscosity v 0.68 10 h,

5 sand density p 2100 kg / m3, oil density ph 945 kg / m3, water cut 20%. The sand content of 3.2 wt.%. The size of the sand fractions is from 0.005 to 2 mm. Inlet and outlet nozzles d 0.06 m were equipped

0 control valves.

Flow characteristic: velocity at the device inlet 0.15 m / s. The flow velocity in the screw is 0.1 m / s. In the operating mode, the screw speed is 0.8 r / s, in the output mode

5 solid phase speed was equal to 0.5 r / s.

Parameters of vibration exciter: frequency of oscillations 45-50 Hz. the oscillation amplitude is 0.2-0.3 mm.

Evaluation of the performance of the proposed device is given by the difference in the content of solid particles in the stream at the inlet and outlet. The quantification of the solid phase (flow) is determined by weighing the dry residue,

As a comparison base, a device for separating a solid phase from a liquid (prototype) is used.

The tests were carried out at the stand.

The results of comparative tests are shown in the table.

The table shows that the sand content in oil when using the proposed device decreased from 3.2 to 0.22%, i.e. 14.5 times, and when using the prototype device from 3.2 to 0.86, i.e. 3.7 times.

Moreover, the content of sand fractions dcp 0.075-0.17 decreased from 9.09 to 0.81, respectively, and from 9.09 to 3.24, i.e. the proposed technical solution in this area is four times more effective than the prototype.

Claims (1)

SUMMARY OF THE INVENTION A device for separating a solid phase from a liquid, comprising a cylindrical conical body, a vertical screw with radial blades in the upper part and a float in the lower part, nozzles for introducing the liquid to be cleaned and outlet for the purified liquid, which, in order to increase the efficiency of the process phase separation, it is equipped with a cylindrical shell coaxially mounted in the housing with the formation of a precipitation channel between them, a screw partition attached to the inner surface of the cylindrical of the casing part, and a circular vibration exciter, for example, hydraulic, mounted on the outer surface of the conical part of the casing, for example, hydraulic, whose vibrations are directed in the direction of flow in the turns of the screw and against the direction of flow in the turns of the screw partition, while the screw is placed inside the cylindrical shell, the nozzle for the input of the liquid to be cleaned located in the upper part of the shell, and the outlet pipe of the purified liquid in the upper part of the housing. The results of bench tests to assess the effectiveness of the invention