RU2236887C1 - Separating plant - Google Patents

Abstract

FIELD: oil industry; separation of oil and gas in oil gathering and preparation systems.

SUBSTANCE: proposed separating plant includes vertical hydraulic cyclone apparatus with pipe lines supplying gas-and-liquid mixture, discharging gas and liquid, concentric entrainment chamber and gas equalizing branch pipe. Hydraulic cyclone apparatus is mounted in horizontal reservoir and its lower edge rests at points of engagement with cylindrical shell of reservoir; lower end of entrainment chamber is located at the same level with lower end of hydraulic cyclone apparatus; gas discharge pipe line is mounted by lower end at level of upper generatrix of reservoir; one end of gas equalizing branch pipe is located in gas chamber of reservoir and other end enters axial zone of gas discharge pipe line.

EFFECT: enhanced efficiency of separation.

1 dwg

Description

The invention relates to the oil industry and can be used to separate oil and gas in a system for collecting and preparing well products.

Known gas-liquid separator containing a vertical cylindrical body, pipelines for supplying a gas-liquid mixture (GHS), gas and liquid discharge, drain pipes, a partition separating the separator into chambers [USSR Author's Certificate No. 1254606, class. B 01 D 45/12, 1982].

The disadvantage of the invention is the low separation efficiency of the gas-liquid mixture.

Closest to the claimed design is a gas-liquid separator (hydrocyclone apparatus), containing a vertical cylindrical body, pipelines for supplying a gas-liquid mixture, drainage of gas and liquid, drain pipes, a partition separating the separator into chambers, while it is equipped with a gas equalizing pipe (pipe) connecting the housing (gas cavity under the conical baffle) of the separator with a gas outlet pipe, while the baffle in the separator body is conical, one of the chambers is an inlet, sleep wife and drain pipes installed concentrically eliminator chamber with swirler, conical lower part and the drain pipes whose lower ends are located below the ends of the discharge pipes of the inlet chamber and installed in gidrozatvorny glass on the bottom. The water seal cup is equipped with ribs on the outer surface and is made at least the height of the upper liquid level in the separator [RF Patent 2190450, cl. On 01 D 19/00, 45/12, published July 27, 2002].

The reasons that impede the achievement of the technical result indicated below when using the known gas-liquid separator include the low separation efficiency of the gas-liquid mixture due to the fact that:

- the liquid volume of the gas-liquid separator is small for settling the liquid and separating gas bubbles;

- the conical bottoms of the inlet chamber of the separator and the concentrically mounted drop chamber with a swirler reduce the volume of the gas-liquid separator for preliminary separation of free gas;

- the swirler installed in the drop chamber is calculated for a certain range of gas flow rates and outside this range the pressure drop increases, and this requires an increase in the liquid level in the valve;

- the placement of drain pipes at different levels reduces the possible level of the shutter, and this, in turn, reduces the margin of pressure drop necessary to prevent gas breakthrough into the liquid level;

- gas equalizing pipe, connecting the gas cavity under the conical baffle in the separator with the gas exhaust pipe, does not provide a sufficient degree of removal of the released gas from the liquid;

- narrowing the area of the passage of liquid in the water seal reduces the performance of the gas-liquid separator and creates the possibility of accumulation of solids.

The technical result that can be obtained by carrying out the invention is to increase the separation efficiency of a gas-liquid mixture.

The specified technical result is achieved by the fact that the separation unit comprising a vertical hydrocyclone apparatus with pipelines for supplying a gas-liquid mixture, a gas and liquid outlet, a concentrically mounted drop chamber and a gas equalizing nozzle, while the hydrocyclone apparatus is installed in a horizontal technological tank, resting at the interface points with the bottom end a cylindrical shell of the technological capacity, the lower end of the drop chamber is located at the same level as the lower end of the hydrocyclone apparatus, the exhaust pipe with the bottom end is installed at a level corresponding to the upper generatrix of the technological container, and the gas equalizing pipe is placed at one end in the gas cavity of the technological tank, the other enters the axial zone of the gas discharge pipe, in addition, between the gas equalizing pipe and the maximum horizontal liquid level a chimney is placed in the tank to prevent splashing in the exhaust pipe.

Placing the lower end of the hydrocyclone apparatus resting on the interface points with the cylindrical shell of the technological vessel and placing the lower end of the drop chamber at the same level as the lower end of the hydrocyclone apparatus can increase the level of the hydraulic seal, which, in turn, prevents the passage of gas into the liquid and vice versa, the passage of liquid into gas line.

The connection of the gas cavity of the process vessel with the gas pipe equalization zone with the axial zone of the exhaust pipe increases the decrease in the pressure drop required for the hydraulic seal and reduces the likelihood of liquid ejecting into the gas line and gas entering the liquid due to the injection effect and removal of the released gas from the process vessel.

The installation of the exhaust pipe with the lower end at a level corresponding to the upper generatrix of the technological tank leads to equalization of pressure between the gas cavity of the technological tank and the axial zone of the gas manifold, which allows to increase the gate seal between the liquid level in the technological tank and the exhaust manifold, and this prevents gas breakthrough from the inlet cavity of the vertical hydrocyclone apparatus into the gas cavity of the process vessel.

The drawing shows a separation installation, General view.

The separation unit contains a horizontal technological tank 1, which houses a vertical hydrocyclone apparatus 2 with a nozzle 3 for introducing a gas-liquid mixture, resting at the points of interface with the cylindrical shell of the horizontal technological tank 1. A droplet chamber 4 is installed concentrically to the hydrocyclone apparatus 1, the lower end of which is located on flush with the lower end of the hydrocyclone apparatus 2. The exhaust pipe 5 with the lower end is installed at a level corresponding to The primary component of the horizontal technological tank 1. The installation is also equipped with a gas equalizing pipe 6, one end of which is located in the gas cavity of the technological tank 1, the other goes into the axial zone of the exhaust pipe 5. Between the gas equalizing pipe 6 and the maximum liquid level of the horizontal tank 1 there is a chipper 7 for prevent spraying in the exhaust pipe 5. The separated liquid is discharged through the pipe 8.

The separation unit operates as follows.

The gas-liquid mixture (GHS) is fed tangentially through the inlet pipe 3 to the vertical hydrocyclone apparatus 2, where the GHS is separated, while the free gas is separated from the liquid and rises, continuing rotation, to the open end of the drop chamber 4, and the liquid flows down the wall of the hydrocyclone apparatus 2. In the drop chamber 4, the gas continues to rotate, while a dropping liquid is released from it, which flows down the wall of the drop chamber 4. The gas, while continuing to rotate, also moves downward and enters the gas exhaust pipe 5. At the same time, the gas released in the horizontal technological tank 1, through the gas equalizing pipe 6 enters the gas exhaust pipe 5. To prevent splashing out of the gas exhaust pipe 5 between the gas equalizing pipe 6 and the maximum liquid level in the horizontal tank 1, a chimney 7 is installed. The separated liquid is discharged through the pipe 8.

Using the proposed separation unit will allow:

- increase the volume of sedimentation and improve the quality of the separation of liquid and gas due to the separation of free gas bubbles in the process tank;

- increase the efficiency of separation of the gas-liquid mixture, increase the level of the water seal, thereby preventing the passage of gas into the liquid and, conversely, the passage of liquid into the gas line;

- increase the removal of released gas from the process vessel due to the injection effect;

- to prevent spraying in the exhaust pipe by placing a chipper between the gas equalizing pipe and the maximum liquid level of a horizontal tank;

- to exclude the possibility of accumulation of solids in a horizontal tank, without reducing the flow area for the exit of fluid from the hydrocyclone into a horizontal tank.

Claims (1)

A separation unit comprising a vertical hydrocyclone apparatus with pipelines for supplying a gas-liquid mixture, a gas and liquid outlet, a concentrically mounted drop chamber and a gas equalizing nozzle, characterized in that the hydrocyclone apparatus is installed in a horizontal technological tank, resting at the points of interface with the cylindrical shell of the technological tank, the lower end of the drop chamber is located at the same level with the lower end of the hydrocyclone, gas venting the lower pipe is installed at the level corresponding to the upper generatrix of the technological tank, and the gas equalizing pipe is placed at one end in the gas cavity of the technological tank, and the other enters the axial zone of the exhaust pipe, in addition, a chipper is placed between the gas equalizing pipe and the maximum liquid level of the horizontal technological tank to prevent splashing in the exhaust pipe.