CN2173661Y - Solid-containing liquid-containing gas separator - Google Patents

Abstract

A new type of gas separator containing solid and liquid is an improvement on the mechanical separation device for gas containing solid and liquid. It utilizes the principle of cyclone separation and optimizes the design of a reasonable fluid flow path to achieve the purpose of mechanical separation. It is mainly composed of a separator shell, a riser pipe, a special guide vane mechanism and a spiral cone.

Description

The utility model relates to a novel solid-containing liquid-containing gas separator, which is an improvement of a mechanical separation device for solid-containing and liquid-containing gas. It utilizes the principle of separation of the vane mechanism to optimize the design of a reasonable fluid flow path to achieve the purpose of mechanical separation. It is mainly composed of a shell, a riser pipe and a guide vane mechanism.

In petroleum development projects, especially in the development of oil and gas fields, it is often encountered that the bottom of some shallow gas wells in some oil and gas fields has a loose stratum structure, and the sand content in the produced gas flow is high, causing many problems to the gathering and transportation system on the ground. Problems, such as the wear and tear on the ground gathering and transportation pipelines, metering instruments and gas processing equipment by the sand-laden airflow, greatly reduce the life of the gas gathering system. The gas flow area is reduced and the flow resistance is increased, which often brings many changes to the cleaning and maintenance, especially the wear of the sand-containing gas on the throttle nozzle will cause the wellhead flow to be out of control. Although bottom sand control is a relatively effective measure, its operation cost is expensive, and generally only high-production gas wells are used. From an economic point of view, it is unreasonable to use downhole sand control in general low-yield gas wells. Therefore, in oil and gas fields, most of the low-production gas wells with severe sand production are forced to shut down. This not only wastes a lot of drilling costs, but also prevents this part of natural gas resources from being developed and utilized in time. Therefore, how to effectively and economically separate sand-containing liquid-containing gas has been researched and explored by petroleum scientists.

The purpose of the utility model is to avoid the deficiencies of the prior art and provide a gas desander and liquid remover that can effectively separate sand and liquid in sand-containing and liquid-containing gas. It uses the centrifugal separation principle of the blade mechanism to separate the sand and liquid in the gas. It is mainly composed of a cylindrical hollow shell, a riser, a guide vane mechanism and a spiral cone. Its main technical feature is that a riser is arranged in the shell, and a For the guide vane mechanism, the air outlet of the air riser is arranged outside the top of the housing, the air inlet of the air riser is arranged at the lower end of the guide vane mechanism, and the fluid inlet of the housing is arranged between the air outlet of the air riser and the guide vane mechanism In the middle position, the spiral-increasing cone is arranged under the air pipe. In this way, the fluid entering the casing from the fluid inlet will enter the guide vane mechanism under the action of its own pressure, and the flow through the mechanism will be accelerated, prompting the sand and liquid in the fluid to increase the centrifugal force and flow along the inside of the casing. The wall slides down to the exit.

Accompanying drawing 1 is the overall structural representation of the utility model.

Accompanying drawing 2 is the structural representation of the guide vane mechanism of the present utility model.

In order to better realize the above-mentioned purpose of the utility model, the designer of the utility model designs the guide vane mechanism (5) to be composed of a horizontal blade (10) and a vertical blade (9), and the horizontal blade (10) The busbar is a horizontal line and vertically intersects with the central axis of the air riser (3); the busbar of the vertical blade (9) is parallel to the central axis of the air riser (3), and its upper and lower sides are respectively connected with the horizontal blade (10). The two sides of the horizontal vane (10) of its guide vane mechanism (5) are respectively connected with the inner wall of the casing (4) and the outer wall of the air riser (3), and are vertically aligned with the projections of the two horizontal vanes (10). The vanes together form the vane mechanism inlet, and the projected overlapping ends together with the vertical vanes (9) form the vane mechanism outlet.

For the air riser (3), it is designed as a hollow cylinder, the upper end is the air outlet (1), which is set outside the top of the casing (4); the lower end is the air inlet (6), which is set on the guide vane The bottom of the mechanism (5); its outer wall is connected with the guide vane mechanism (5).

For the shell (4), it is designed as a hollow cylinder with both ends blocked, and its fluid inlet (2) is set at the air outlet (1) of the air riser (3) and the guide vane mechanism (5) the middle position; its sand outlet (8) is set at the bottom of the shell (4); (4) The inner wall is provided with an increasing-rotation cone (7), and the conical end of the increasing-rotation cone (7) with the outlet faces downwards to the sand outlet (8) of the housing (4).

In order to optimize the guide vane mechanism, the designer designed the horizontal blade (10) of the guide vane mechanism (5) so that the intersection line with the outer wall of the air riser (3) can be developed into arc lines, power function curves and exponential curves. function curve.

The descriptions of the attached drawings are as follows:

1－－－air pipe outlet 2－－－fluid inlet 3－－－air pipe 4－－－housing

5－－－Guide vane mechanism 6－－－Intake port of air riser 7－－－Screw-increasing cone 8－－－Sand outlet

9－－－Vertical blade 10－－－Horizontal blade

The structural characteristics of the utility model will be described in detail below in conjunction with the accompanying drawings and embodiments:

In actual design and manufacture, the designer of the utility model designed the fluid inlet to enter the separator shell tangentially or radially, so that the sand-containing liquid gas also enters the separator tangentially or radially, and then Then enter the guide vane mechanism; the guide vane mechanism is designed to be composed of horizontal blades and vertical blades, all of which are composed of three or four pieces, and the overlapping projections of the two horizontal blades form the inlet and outlet of the rotating fluid. exit, and add vertical blades where the projections of the two horizontal blades overlap; wherein, the generatrix of the horizontal blades is a horizontal line and intersects vertically with the central axis of the air riser, and the intersection line between the horizontal blades and the outer wall of the air riser can be expanded into a circular arc line, power line, or exponential curve. The wrap angle of the horizontal blade is 135-225°, the inlet angle of the horizontal blade is between 45-75°, and the outlet angle is between 10-20°; Its front edge is connected with the outer wall of the air pipe, and its end forms the outlet of the blade mechanism with the upper and lower horizontal blades and the shell. The projection of the vertical blades on the horizontal plane can be arc lines, ellipse lines, involute lines or spiral lines.

In this way, the sand-containing liquid-containing fluid enters the separator along the fluid inlet of the separator, and accelerates to rotate after passing through the guide vane mechanism to form a vortex flow. At the same time, the vortex flow can be further strengthened in the lower swirling cone tube. Under the action, the denser solids and liquids migrate to the wall of the shell, the gas forms an inner blade mechanism, and is discharged upward through the air riser, and the solids and liquids are discharged from the sand outlet below. Thereby achieving the purpose of desanding fluid.

The utility model has a wider adaptable flow range and can have higher separation efficiency under low processing capacity. It is light in weight and small in size, which is only a few tenths of the gravity sedimentation separator in the current oil field gas well metering station.

Claims (5)

1. A solid-containing liquid-containing gas separator, which is composed of a shell (4), a gas riser (3), a guide vane mechanism (5) and a spiral cone (7), and its body is characterized in that the shell (4) ) is provided with a riser pipe (3), and a guide vane mechanism (5) is arranged at the annular space between the riser pipe (3) and the housing (4), and the air outlet (1) of the riser pipe (3) is arranged at Outside the top of the casing (4), the air inlet (6) of the air riser (3) is arranged at the lower end of the guide vane mechanism (5), and the fluid inlet (2) of the casing (4) is arranged at the air riser (3). ) between the air outlet (1) and the guide vane mechanism (5), and the increasing-rotation cone is arranged below the air inlet of the air riser. 2. The solid-containing liquid-containing gas separator according to claim 1, characterized in that the guide vane mechanism (5) is composed of horizontal vanes (10) and vertical vanes (9), and the generatrices of the horizontal vanes (10) It is a horizontal line and vertically intersects with the central axis of the air riser (3); the generatrices of the vertical blades (9) are parallel to the central axis of the air riser (3), and its upper and lower sides are connected to the horizontal blades (10) respectively. 3. The gas separator containing solid and liquid according to claim 1, characterized in that the two sides of the horizontal vane (10) of the guide vane mechanism (5) are respectively connected to the inner wall of the shell (4) and the outer wall of the air riser (3) They are connected to each other and form the inlet of the blade mechanism together with the vertical blade at the overlapping projection of the two horizontal blades (10), and form the outlet of the blade mechanism together with the vertical blade (9) at the end where the projection overlaps. 4. The solid-containing liquid-containing gas separator according to claim 1, characterized in that the gas riser (3) is a hollow cylindrical cylinder, and the upper end is an air outlet (1), which is arranged outside the top of the shell (4); The lower end is an air inlet (6), which is arranged below the guide vane mechanism (5); its outer wall is connected with the guide vane mechanism (5). 5. The solid-containing liquid-containing gas separator according to claim 1, characterized in that the shell (4) is a hollow cylindrical cylinder with both ends blocked, and its fluid inlet (2) is set at the bottom of the gas riser (3). The middle position between the air outlet (1) and the guide vane mechanism (5); its sand outlet (8) is set at the bottom of the casing (4); and at the air inlet (6) of the air riser (3) The bottom and the top of the sand outlet (8) are provided along the inner wall of the casing (4) with an increasing rotation cone (7). The sand outlet (8) is relative.

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