CN104826402A - Compact type in-line liquid separator - Google Patents

Abstract

The invention relates to a compact inline dehydrator, which is composed of an air inlet pipe, a vortex generator, a separation chamber, an exhaust pipe, a liquid discharge pipe and a liquid level control valve; wherein, the air inlet pipe, the vortex generator The separator, the separation chamber and the exhaust pipe are connected in turn by flanges; the guide vanes of the vortex generator are closely matched with the housing of the vortex generator, and the guide vanes can swirl after the gas-liquid mixture flows through the guide vanes in the housing. flow; the discharge pipe is connected to the end of the separation chamber, and a liquid level control valve is installed at the end of the discharge pipe. The dehydrator is mainly used to separate the liquid in the gas-liquid mixture (the gas phase is the main body), and can provide a simple structure, Compact inline dehydrator with easy installation, low pressure drop and high separation efficiency. The device can be installed and operated under complex environment and space-limited conditions, and can effectively remove liquid from gas, with high reliability.

Description

Compact Inline Dehydrator

technical field

The invention relates to the field of gas-liquid separation equipment, in particular to a compact inline dehydrator.

Background technique

Cyclone separators have been widely used in mineral processing, petroleum, chemical industry, light industry, environmental protection, medicine, textile and many other industrial fields because of their advantages such as high separation efficiency, small equipment size and suitable for long-term operation. Gas-liquid cyclone separation technology is an efficient multi-phase fluid separation technology. Its principle is to use the density difference between two or more phases under the action of centrifugal force to achieve two-phase or multi-phase separation. According to the working principle, the gas-liquid cyclone separator is divided into column type cyclone separator, axial flow guide vane type gas-liquid cyclone separator, swirl plate type gas-liquid separator, spiral vane type gas-liquid separator, Pipeline gas-liquid cyclone separator, etc. Among them, the pipeline gas-liquid cyclone separator is a compact and high-efficiency gas-liquid separation and a unique new technology high-efficiency separation device that recovers the lost pressure drop during operation. The device can directly install the gas-liquid cyclone separator on the oil or natural gas pipeline with a flange, which has the advantages of high efficiency, skid-mounted, movable and miniaturized, and can effectively reduce the transportation cost and reduce the gas-liquid two-way flow. Intermittent flow, pipeline blockage, deposition and other typical problems of multiphase flow transportation that are easy to occur during phase flow transportation. This makes it an optimal solution to the current problem of gas-liquid separation in complex environments and under space-constrained conditions.

The basic working principle of the pipeline gas-liquid cyclone separator is: the gas-liquid mixture enters the inlet section of the pipeline gas-liquid cyclone separator. After the gas-liquid two-phase flow passes through the swirl flow generator, the gas-liquid two-phase flow rotates under the action of the guide vanes to form a swirl flow, and under the action of centrifugal force, the liquid phase with higher density flows to the inner wall of the separation chamber to form a The liquid film, while the less dense gas phase flows out through the outlet of the exhaust pipe, the separated liquid coalesces in the annular space between the separation chamber and the exhaust pipe, and is discharged through the liquid discharge pipe. Similarly, the selection of the swirl generator material and the design of the swirl generator structure are also the key technologies involved in the pipeline gas-liquid cyclone separator. In order to ensure that the gas-liquid cyclone separator has the advantages of simple structure, low manufacturing cost, long-term operation, easy installation and convenient operation in the application process, the most ideal material for the gas-liquid cyclone separator should be cheap, easy to obtain, Corrosion resistance, corrosion resistance, good mechanical processing and heat treatment performance. The most ideal design specification is to design and manufacture based on the pipeline design specification.

Due to the limitations of the cyclone method and application occasions, it is difficult for the current gas-liquid cyclone separator to meet the design requirements of simple structure, small size, and low pressure drop at the same time. Moreover, during the design and use of the cyclone separator, the pressure drop of the cyclone separator caused by many factors including the factor of the vortex element is too large, and the pressure of the gas-liquid two-phase flow needs to be increased, thus increasing the pressure of the cyclone separator. Design, manufacture and maintenance costs. With the high efficiency and compactness of separation equipment in complex environments and space constraints, it is necessary to design a simple structure, low cost, small size, light weight, small footprint, low maintenance costs, no moving parts, high separation efficiency, The gas-liquid cyclone separator, which is easy to install and operate, has become the ideal solution for separating gas-liquid mixtures (gas phase) in complex environments and space-limited conditions in offshore platforms, deep-water or ultra-deep water oil and gas development (petroleum, natural gas, chemical, biological and environmental protection) and other fields. the urgent need of the subject).

Contents of the invention

Based on the problems existing in the above-mentioned prior art, the present invention provides a compact inline dehydrator, which can overcome the shortcomings of existing separators such as bulky size, excessive pressure drop, complex structure, and easy failure of moving parts. Simple structure, easy installation, low pressure drop, high separation efficiency, can be used in offshore platforms, deep water or ultra-deep water oil and gas development (petroleum, natural gas, chemical, biological and environmental protection) and other fields to separate gas in complex environments and space constraints The liquid phase in a liquid mixture (gas phase as the main body).

In order to solve the above technical problems, the present invention provides a compact inline dehydrator, which is composed of an intake pipe, a vortex generator, a separation chamber, an exhaust pipe, a liquid discharge pipe and a liquid level control valve; wherein ,

The intake pipe, vortex generator, separation chamber and exhaust pipe are sequentially connected by flanges;

The guide vanes of the vortex generator are closely matched with the housing of the vortex generator, and the guide vanes can swirl after the gas-liquid mixture flows through the guide vanes in the housing;

The liquid discharge pipe is connected to the end of the separation chamber, and the liquid level control valve is installed at the end of the liquid discharge pipe.

Compared with the prior art, the present invention has the advantages that: the compact inline dehydrator is formed by sequentially connecting the intake pipe, the vortex generator, the separation chamber and the exhaust pipe with flanges, and serves as the guide vane of the separation element They are all installed inside the shell of the vortex generator, which overcomes the shortcomings of the existing separator such as bulky volume, excessive pressure drop, complex structure, and easy failure of moving parts; at the same time, the compact inline dehydrator is based on the pipeline design specification According to the design and manufacture, the flange can be directly connected to the pipeline during work, which is easy to install, easy to operate, and low maintenance cost. It can be conveniently used in special applications such as offshore platforms, deep-water or ultra-deep-water oil and gas development (petroleum, chemical, biological and environmental protection) in complex environments and limited space.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For Those of ordinary skill in the art can also obtain other drawings based on these drawings on the premise of not paying creative efforts.

Fig. 1 is a schematic structural diagram of a half-section front view of a compact inline dehydrator according to an embodiment of the present invention;

Fig. 2 is the three-dimensional structure schematic diagram of the guide vane of the vortex generator of the embodiment of the present invention;

3 is a schematic cross-sectional structural view of a separation chamber and a drain pipe connector according to an embodiment of the present invention;

Fig. 4 is a schematic cross-sectional structure diagram of the installation position of the exhaust pipe according to the embodiment of the present invention;

The labels in the figure are: 1. Intake pipe; 2. Vortex generator; 20. Shell; 201. First pipe body; 202. Middle pipe body; 203. End pipe body; 21. Guide vane; 3. Separation 4. Exhaust pipe; 40. Annular liquid collection space; 41. Exhaust pipe section; 42. Expanding outlet pipe section; 5. Liquid discharge pipe; 6. Liquid level control valve.

Detailed ways

The following clearly and completely describes the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

As shown in Figure 1, the embodiment of the present invention provides a compact inline dehydrator, which consists of an intake pipe 1, a vortex generator 2, a separation chamber 3, an exhaust pipe 4, a liquid discharge pipe 5 and The liquid level control valve consists of 6 components;

Wherein, the intake pipe 1, the vortex generator 2, the separation chamber 3 and the exhaust pipe 4 are sequentially connected by flanges (preferably standard flanges); preferably, each part is connected in a long tubular structure as a whole;

The guide vanes 21 of the vortex generator 2 are closely matched with the housing 20 of the vortex generator 2, and the guide vanes 21 can swirl after the gas-liquid mixture flows through the guide vanes 21 in the housing 20;

A liquid discharge pipe 5 is connected to the end of the separation chamber 3, and a liquid level control valve 6 is installed at the end of the liquid discharge pipe 5.

In the above dehydrator, the two ends of the inlet pipe 1 are provided with standard flanges for connecting with external equipment, so as to facilitate the connection with upstream equipment or pipelines.

In the above-mentioned dehydrator, the guide vane 21 of the vortex generator 2 is a multi-head guide vane (as shown in Figure 2 ) consisting of a plurality of guide vanes with a helix angle; the casing 20 of the vortex generator 2 consists of three sections The pipe bodies are connected by flanges. Among the three pipe bodies, the shapes of the first pipe body 201 and the last pipe body 203 are conical, and the inlet diameter of the first pipe body 201 is smaller than the outlet diameter; the last pipe body 203 The inlet diameter is greater than the outlet diameter; the middle pipe body 202 is a straight pipe body, its inlet diameter matches the outlet diameter of the first pipe body 201, and its outlet diameter matches the inlet diameter of the end pipe body 203. The two ends of the vortex generator 2 of this structure are tapered bodies and the middle straight pipe section to form a tubular shell structure with thick middle ends and thin ends, and the tapered pipe sections at both ends can play the role of diversion and flow stabilization. Preferably, there are 8 guide vanes, and the angle of each guide vane is 45° at the guide outlet.

In the above-mentioned dehydrator, the cross-sections at both ends of the guide vane 21 of the vortex generator 2 are respectively equal to the outlet diameter of the first pipe body and the inlet diameter of the last pipe body of the casing 20 . In this way, the guide vanes 21 of the vortex generator 2 and the pipe section of the conical body at both ends form an equal-section design with the middle section of the casing, which can ensure that the gas-liquid mixture flow maintains an equal-section flow before and after the vortex generator.

In the above dehydrator, both ends of the separation chamber 3 have standard flanges for easy connection, and the length of the separation chamber 3 is greater than the length of the intake pipe 1 or the vortex generator 2 . Making the separation chamber 3 have a certain length can ensure that the gas-liquid mixture can be separated well.

As shown in Figure 3, in the above-mentioned dehydrator, the exhaust pipe 4 is composed of an exhaust pipe section 41 and a gradually expanding outlet pipe section 42 (similar to a trumpet shape), and the flange connecting the separation chamber 3 is located between the exhaust pipe section 41 and the gradually expanding outlet pipe section 42. At the junction of the expanding outlet pipe section 42, the outer diameter of the exhaust pipe section 41 is smaller than the internal diameter of the separation chamber 3, which is a long thin tube. An annular liquid collection space 40 is formed between them; the gradually expanding outlet pipe section 41 of the exhaust pipe 4 is provided with a standard flange for connecting downstream pipes.

As shown in Figure 4, in the above-mentioned liquid remover, the drain pipe 5 is a U-shaped pipe, and the inlet of the drain pipe 5 is connected to the separation chamber 3 and the exhaust pipe section 41 of the exhaust pipe 4 inserted into the separation chamber 3 The formed annular liquid collection space 40 (refer to Fig. 3) is convenient for collecting liquid and discharging it, and the liquid in the U-shaped pipe can prevent the gas from flowing out from the liquid discharge pipe. Preferably, the separation chamber 3 and the liquid discharge pipe 5 are integrally formed The structure; the liquid level control valve 6 is located at the outlet of the discharge pipe 5, which can control the liquid level in the discharge pipe and prevent the gas from overflowing from the discharge pipe.

The dehydrator of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

The compact inline dehydrator provided by the embodiment of the present invention can be used in fields such as offshore platforms, deepwater or ultra-deepwater oil and gas development (petroleum, chemical industry, biology and environmental protection), and separates gas-liquid mixtures in complex environments and space constraints (The gas phase is the main body) in the liquid. As shown in Figure 1, the compact inline dehydrator is mainly composed of an intake pipe, a vortex generator, a separation chamber, an exhaust pipe, a liquid discharge pipe, and a liquid level control valve. The generator 2 is connected with a standard flange, and the guide vane is closely matched with the shell of the vortex generator 2; the vortex generator 2 and the separation chamber 3 are connected with a standard flange; the exhaust pipe 4 is connected with the separation chamber 3 through a standard flange, One of the pipes is inserted into the separation chamber 3 to form an annular liquid collection space for collecting liquid, and the other end is provided with a standard flange for easy connection with downstream pipes. The separation chamber 3 and the discharge pipe 5 are connected by a standard flange, wherein the discharge pipe 5 is a U-shaped pipe; the liquid level control valve 6 is connected to the bottom outlet of the discharge pipe 5 through a standard flange.

Fig. 2 is a three-dimensional structural schematic diagram of the vortex generator 2 in the dehydrator of the present invention. There is a cone at each end to form a constant cross-section flow channel. The gas-liquid mixture passes through the guide vanes of the vortex generator 2 to form a swirling flow. During installation, the vortex generator 2 is installed in the pipe section. The vortex generator is composed of guide blades with a certain helix angle. The optimal combination of the number of guide vanes and the helix angle is the key to ensure the inline dehydrator. The optimal combination is 8 sets of blades and 45° guide outlet horn.

In the above dehydrator, the separation chamber 3 has a certain length to meet the requirement of separating the gas-liquid two-phase as much as possible. The annular area formed by the exhaust pipe and the separation chamber should meet the liquid collection requirements as much as possible. The drain pipe can collect the separated liquid, prevent gas from overflowing, and assist in controlling the liquid level. The liquid level control valve can control the liquid level of the discharge pipe.

Fig. 3 is a three-dimensional structural schematic diagram of the installation position of the exhaust pipe 4 in the dehydrator of the present invention, the separated liquid droplets are collected in the annular space formed between the cyclone separation pipe 3 and the exhaust pipe 4, and passed through the U-shaped liquid collection Tube 5 exits. The diffuser section in the second half of the exhaust pipe 4 can restore the gas to a certain pressure, thereby reducing the pressure drop loss of the equipment, and the other end is provided with a standard flange for easy connection with the downstream pipeline.

Fig. 4 is a schematic cross-sectional structure diagram of the connecting body of the separation chamber 3 and the drain pipe 5 in the dehydrator of the present invention, which has good corrosion resistance and can effectively prevent the corrosion of the liquid and acidic substances in the separation liquid. Both ends have standard flanges for easy installation.

As shown in Figure 1, the principle of the above-mentioned dehydrator is: the intake pipe and the vortex generator are connected by a standard flange, wherein the vortex generator is provided with multiple guide vanes, and the guide vanes are closely matched with the vortex generator shell. When the liquid mixture passes through the vortex generator, it can make it swirl, and there is a cone at the front and rear ends to ensure that the gas-liquid mixture flows through the vortex generator. The vortex generator and the separation chamber adopt the standard method The separation chamber has a certain length to ensure that the gas-liquid mixture can be well separated; the exhaust pipe is connected to the separation chamber through a standard flange, and a section of pipe is inserted into the separation chamber to form an annular space for liquid collection. The other end is provided with a standard flange, which is convenient for connection with the downstream pipeline; the separation chamber and the discharge pipe are connected by a standard flange, and the discharge pipe is a U-shaped pipe, whose function is to collect the liquid and discharge it, and at the same time The function of the liquid seal; the liquid level control valve is connected to the discharge pipe through a standard flange, and its function is to control the liquid level in the discharge pipe and prevent the gas from overflowing from the discharge pipe.

The above-mentioned compact inline dehydrator has the advantages of compact structure, simple, no power parts, small size, light weight, small space occupation, high separation efficiency, low manufacturing cost, low maintenance cost, easy installation and convenient operation, etc. It is conveniently used in offshore platforms, deepwater or ultra-deepwater oil and gas development (petroleum, natural gas, chemical industry, biology and environmental protection) and other fields to separate liquids in gas-liquid mixtures (gas phase as the main body) in complex environments and space constraints.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person familiar with the technical field can easily conceive of changes or changes within the technical scope disclosed in the present invention. Replacement should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (10)

1. A compact internal connection type liquid remover is characterized in that the liquid remover consists of an air inlet pipe (1), a vortex generator (2), a separation cavity (3), an exhaust pipe (4), a liquid discharge pipe (5) and a liquid level control valve (6); wherein,

the air inlet pipe (1), the vortex generator (2), the separation cavity (3) and the exhaust pipe (4) are connected in sequence by flanges;

the guide vane (21) of the vortex generator (2) is tightly matched with the shell (20) of the vortex generator (2), and the guide vane (21) can generate rotational flow after a gas-liquid mixture flows through the guide vane (21) in the shell (20);

the liquid discharge pipe (5) is connected to the tail end of the separation cavity (3), and the liquid level control valve (6) is installed at the tail end of the liquid discharge pipe (5).

2. The compact inline liquid trap according to claim 1, wherein the air inlet pipe (1), the vortex generator (2), the separation chamber (3) and the air outlet pipe (4) are connected to form a long tubular structure.

3. The compact inline liquid trap according to claim 1 or 2, characterized in that both ends of the inlet pipe (1) are provided with standard flanges for connection with external equipment.

4. The compact inline liquid trap according to claim 1 or 3, characterized in that the guide vane (21) of the vortex generator (2) is a multi-start guide vane consisting of a plurality of guide vanes with a helical angle;

the shell (20) of the vortex generator (2) is formed by connecting three sections of pipe bodies through flanges, wherein in the three sections of pipe bodies, the first section of pipe body (211) and the last section of pipe body (213) are both conical in shape, and the diameter of an inlet of the first section of pipe body (211) is smaller than that of an outlet; the inlet diameter of the end section pipe body (213) is larger than the outlet diameter; the middle section pipe body (212) is a straight pipe body, the inlet diameter of the middle section pipe body is matched with the outlet diameter of the first section pipe body (211), and the outlet diameter of the middle section pipe body is matched with the inlet diameter of the tail section pipe body (213).

5. The compact inline liquid stripper according to claim 4, characterized in that the cross sections of the two ends of the guide vanes (21) of the vortex generator (2) are respectively equal to the outlet diameter of the first section pipe body (211) and the inlet diameter of the last section pipe body (213) of the casing (20).

6. The compact inline liquid trap according to claim 1, characterized in that the separation chambers (3) each have a length which is greater than the length of the inlet pipe (1) or the vortex generator (2).

7. The compact inline liquid remover according to claim 1, wherein the gas exhaust pipe (4) is composed of a gas exhaust pipe section (41) and a divergent outlet pipe section (42), a flange connecting the separation chamber (3) is provided at the connection of the gas exhaust pipe section (41) and the divergent outlet pipe section (42), the gas exhaust pipe section (41) is inserted into the separation chamber (3), and an annular liquid collecting space (40) is formed between the outer wall of the gas exhaust pipe section (41) and the inner wall of the separation chamber (3).

8. The compact inline liquid trap according to claim 7, characterized in that the diverging outlet section (42) of the exhaust pipe (4) is provided with a standard flange for connecting downstream pipes.

9. The compact inline liquid trap according to claim 1, wherein the drain pipe (5) is a U-shaped pipe;

the liquid level control valve (6) is arranged at the outlet of the liquid discharge pipe (5).

10. The compact inline liquid stripper according to claim 1, 7 or 9, characterized in that the inlet of the liquid discharge pipe (5) is connected at the annular liquid collecting space formed by the separation chamber (3) and the gas discharge pipe section of the gas discharge pipe (4) inserted into the separation chamber (3).