CN103977665A - Gas-liquid separator - Google Patents

Abstract

The invention discloses a gas-liquid separator. The gas-liquid separator comprises: a cylinder, an air inlet pipe is connected to the outer wall of the cylinder along its horizontal tangential direction, and an air inlet pipe is connected to the upper end of the cylinder. The air outlet pipe; the cyclone separation assembly is arranged inside the cylinder, including a spiral plate extending spirally from the inner wall of the cylinder to the center to form a spiral passage, and the air inlet pipe communicates with the spiral passage; the wire mesh part is arranged on the The cylinder is inside and above the cyclone separation assembly; the liquid discharge assembly is arranged inside the cylinder and below the cyclone separation assembly to discharge the separated liquid. The gas-liquid separator provided by the invention is used to efficiently complete the gas-liquid separation.

Description

Gas-liquid separator

technical field

The invention relates to the field of gas-liquid separation, in particular to a gas-liquid separator.

Background technique

The main function of the gas-liquid separator is to remove the liquid substances entrained in the gas, and there are many types of gas-liquid separators. It is common for traditional gas-liquid separators to use wire mesh for mist trapping and separation. This type of gas-liquid separator is prone to crystallization of salts in liquid substances after gas-liquid separation or the accumulation of heavy organic matter in the wire mesh, resulting in The screen is easy to block, the efficiency of gas-liquid separation is low, and the operation cycle is short.

In addition to low separation efficiency, if the screen is blocked, it will directly cause the gaseous substances to be unable to be transported normally, and the pressure of the pipeline and equipment will cause the production system to stop production, directly threatening the safety of personnel and the normal transmission of gas.

Therefore, it is necessary to provide a novel gas-liquid separator to efficiently realize gas-liquid separation.

Contents of the invention

The object of the present invention is to provide a gas-liquid separator to efficiently complete gas-liquid separation.

In order to achieve the above object, the present invention provides a gas-liquid separator, which includes: a cylinder, an air inlet pipe is connected to the outer wall of the cylinder along its horizontal tangential direction, and The upper end of the cylinder is connected with an air outlet pipe; the cyclone separation assembly is arranged inside the cylinder, including a spiral plate extending spirally from the inner wall of the cylinder to the center to form a spiral passage, and the air inlet pipe communicates with the spiral passage; The net part is arranged inside the cylinder and above the cyclone separation assembly; the liquid discharge assembly is arranged inside the cylinder and below the cyclone separation assembly to discharge the separated liquid.

Preferably, the cyclone separation assembly further includes an annular upper baffle and an annular lower baffle respectively fixed on the upper end and the lower end of the spiral plate, and the outer circumference of the annular upper baffle and the annular lower baffle are also fixed to the The inner wall of the cylinder, and the inner circumference corresponds to the inner layer of the spiral channel.

Preferably, the upper end of the spiral plate and the annular upper baffle are tapered upwards, and the lower end of the spiral plate and the annular lower baffle are tapered downwards.

Preferably, the taper of the annular lower baffle is greater than the taper of the annular upper baffle.

Preferably, the gas-liquid separator further includes an intermediate drain pipe fixed on the outer wall of the cylinder, the upper end of the intermediate drain pipe communicates with the space above the annular upper baffle, and the lower end communicates with the space above the annular upper baffle. The space below the cyclone separation assembly, and the lower wall of the upper end of the middle drain pipe is lower than the highest point of the annular upper baffle.

Preferably, a switching valve is installed on the intermediate drain pipe.

Preferably, the air inlet pipe is located above the middle of the cyclone separation assembly.

Preferably, the gas-liquid separator further includes a screen flushing pipe arranged above the screen to flush the screen.

Preferably, the liquid discharge assembly includes: a positioning plate, a part of the outer periphery of the positioning plate extends obliquely downward from the inner wall of the cylinder, and the other part does not contact the inner wall of the cylinder; an emptying tube communicates with Outside the cylinder, one end of the vent tube inside the cylinder is sealed, and a plurality of through holes are opened on the upper surface of the vent tube; upper and lower partitions arranged alternately , the upper end of the upper partition is fixed to the positioning plate, the lower end of the lower partition is fixed to the vent pipe, and the adjacent upper partition and the lower partition are not in contact; the liquid discharge port is opened in the cylinder On the side wall and located on the upper part of the drain assembly.

Preferably, the lower end of the lower partition is fixed to the vent pipe through an inclined connecting plate.

Preferably, a sealing plate is provided between the vent pipe and the inner wall of the barrel to prevent liquid from flowing under the vent pipe.

Through the gas-liquid separator provided by the present invention, the gas containing liquid droplets enters the cyclone separation assembly from the inlet pipe, and flows along the spiral channel to the center of the cylinder, and then flows upward from the center of the cylinder to the screen part, and then It flows out from the air outlet pipe, and the separated liquid falls down from the screen part and the cyclone separation assembly to the liquid discharge assembly, and then is discharged. Therefore, inside the cylinder, the gas undergoes two gas-liquid separations, which significantly improves the gas-liquid separation efficiency. In addition, because most of the liquid droplets contained in the gas are separated by the cyclone separation component, it will not cause the screen to be blocked, which improves the service life of the gas-liquid separator and reduces maintenance costs.

Description of drawings

Fig. 1 is the structural representation of the gas-liquid separator according to the specific embodiment of the present invention;

Fig. 2 is a sectional view taken along the B-B line of Fig. 1;

Fig. 3 is a sectional view taken along line A-A of Fig. 1;

Fig. 4 is a sectional view taken along line C-C of Fig. 1 .

Detailed ways

In order to enable those skilled in the art to better understand the present invention, specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

Fig. 1 is a schematic structural view of a gas-liquid separator according to a specific embodiment of the present invention, Fig. 2 is a sectional view taken along the B-B line of Fig. 1 , Fig. 3 is a sectional view taken along the A-A line of Fig. 1 , Fig. 4 is a sectional view taken along the line A-A of Fig. 1 Sectional view taken along line C-C of 1.

Referring to Fig. 1 to Fig. 4, the gas-liquid separator according to the embodiment of the present invention comprises: cylinder body 1, and this cylinder body can be generally cylindrical shape, on the outer wall of cylinder body 1 along its horizontal tangential direction, is connected with inlet The air pipe 3 is connected with the air outlet pipe 7 at the upper end of the cylinder body 1; the cyclone separation assembly is arranged inside the cylinder body 1, and includes a spiral plate 2 extending spirally from the inner wall of the cylinder body 1 to the center thereof to form a spiral channel, And the inlet pipe 3 communicates with the spiral channel formed by the spiral plate 2, so that the gas directly enters the spiral channel from the inlet pipe 3 along the tangential direction of the cylinder 1; the silk screen part 5 is arranged inside the cylinder 1 and is located in the cyclone above the separation assembly; the liquid discharge assembly is arranged inside the cylinder 1 and below the cyclone separation assembly to discharge the separated liquid.

In order to ensure the internal sealing of the cylinder body 1, its upper and lower ends can be sealed by sealing covers 6 and 19 respectively, the air outlet pipe 7 can be installed through the sealing cover 6, and the sealing cover 19 can also be used to fix the gas-liquid separator to prevent it from operating. shaking during the process.

The spiral plate 2 of the cyclone separation assembly may be formed of a corrosion-resistant material to prolong its service life. As shown in Figure 2, the cross-section of the spiral plate 2 is spiral, and the gas flows along the outer layer of the spiral plate 2 after entering from the inlet pipe 3, and finally reaches the center of the spiral plate 2, and then flows upwards.

The cyclone separation assembly also includes an annular upper baffle 11 fixed on the upper end of the spiral plate 2 and an annular lower baffle 12 fixed on the lower end of the spiral plate 2 . Specifically, both the annular upper baffle plate 11 and the annular lower baffle plate 12 are ring-shaped, and their outer circumference (i.e., at the outer diameter) is fixed to the inner wall of the cylinder body 1, while the inner circumference (i.e., at the inner diameter) has the same shape as The shape of the inner layer of the spiral plate 2 corresponds. That is to say, the opening size of the upper and lower ends of the cyclone separation assembly is consistent with the inner layer size of the spiral plate 2. When the gas flows through the cyclone separation assembly, it flows upward from the central opening at the upper end, and the gas separated in the cyclone separation assembly The droplet flows downward from a central opening at its lower end, as shown in Figure 1.

In order to facilitate the flow of gas and the discharge of separated liquid droplets, the upper end of the spiral plate 2 and the annular upper baffle 11 are conical shapes protruding upward, while the lower end of the spiral plate 2 and the annular lower baffle 12 are both downward Protruding cone so that no droplets remain in the cyclone baffle. In addition, the taper of the annular lower baffle 12 may be greater than the taper of the annular upper baffle 11 .

A support can also be fixed below the annular lower baffle 12 , one end of the support is fixed to the cylinder body 1 , and the other end is fixed to the annular lower baffle 12 to support the annular lower baffle 12 .

In addition, in order to make the gas flow in the cyclone separation assembly for a longer time as much as possible, the inlet pipe 3 may be located at the middle and upper part of the cyclone separation assembly. When the gas flows in from the inlet pipe 3, the gas flows helically along the spiral channel on the one hand, and has a tendency to flow downward due to the liquid mist on the other hand. In this way, a part of the gas will flow to the middle and lower part of the cyclone separation assembly. When the gas spirally flows to the central position, it will flow upward from the center of the cylinder body 1 due to the pressure effect and the reduction of liquid droplets, and finally flow to the wire mesh part 5 .

The size of the spiral plate 2 can be set mainly according to the physical and chemical properties of the gas-liquid mixture, the amount of gas processed per hour, and the specific gravity of the liquid contained in the gas. For example, the diameter of the inlet pipe 3 is D1, the inner diameter of the cylinder 1 is D2, and the radial distance D between two adjacent layers of the spiral plate 2 is 0.75D1, so as to ensure the pressure drop when the gas flows in the spiral channel . In addition, the spiral number (or layer number) M of the spiral plate 2 can be D2/D+1, so as to ensure the gas-liquid separation efficiency of the gas in the cyclone separation assembly. The height H1 of the spiral plate 2 may be 0.25πD1 ² /D.

The filter elements in the screen part 5 can be arranged irregularly to improve the gas-liquid separation effect. The size of the screen part 5 can be set according to the properties of the gas-liquid mixture, the content of liquid mist and the pressure drop of the gas. For example, in a preferred embodiment of the present invention, the height H2 of the mesh portion 5 may be 0.25H1.

A screen washing pipe 8 is further arranged above the screen part 5 , and the spray head of the screen washing pipe 8 faces the screen part 5 to clean the screen part 5 regularly. In addition, a flushing pipe 4 can also be connected to the inlet pipe 3 so as to clean the gas-liquid separator from the inlet pipe 3 .

In order to make the liquid separated from the screen part 5 be discharged from the liquid discharge assembly without affecting the normal separation operation of the cyclone separation assembly, an intermediate liquid discharge pipe 9 is also fixed outside the cylinder body 1, and the intermediate liquid discharge pipe 9 The upper end of the upper end is connected to the space between the annular upper baffle 11 and the screen part 5, the lower end is connected to the space between the annular lower baffle 12 and the liquid discharge assembly, and the lower wall of the upper end of the middle discharge pipe 9 should be lower than The highest point of the annular upper baffle 11, so that the liquid separated in the screen part 5 can flow to the liquid discharge assembly through the middle drain pipe 9, and can prevent the liquid from accumulating too much on the annular upper baffle 11 and passing through the cyclone. Separation components flow down.

A switching valve 10 is also installed on the middle drain pipe 9 to control the opening and closing of the middle drain pipe 9 . In addition, a cleaning reserved opening 21 is added on the middle drain pipe 9 to facilitate cleaning of the pipe.

The liquid discharge assembly of the gas-liquid separator may specifically include: a positioning plate 14, a part of its outer circumference extends obliquely downward from the inner wall of the cylinder 1, and other parts are not in contact with the inner wall of the cylinder 1, so as to prepare for the liquid to flow downward. Leave a channel; vent pipe 18, connected to the outside of the cylinder 1; alternately arranged upper partitions 15 and lower partitions 16, the upper end of the upper partition 15 is fixed to the positioning plate 14, and the lower end of the lower partition 16 is fixed to The vent pipe 18, and the adjacent upper partition 15 and the lower partition 16 do not touch, and the lower end of the upper partition 15 does not contact the vent pipe 18, and the upper end of the lower partition 16 does not contact the positioning plate 14; the liquid discharge port 13, set on the side wall of the cylinder body 1, and located on the upper part of the drain assembly. Simultaneously, a plurality of through holes are opened on the vent pipe 18 to make the vent pipe 18 communicate with the space above it, so that the liquid can be accommodated in the vent pipe 18 and the space above the vent pipe 18 . Therefore, the closed vent pipe 18, the upper partition 15 and the lower partition 16 constitute the water seal part of the liquid discharge assembly, thereby effectively preventing gas from overflowing through the liquid discharge assembly.

Furthermore, the lower bulkhead 16 may be fixed to the vent pipe 18 by an inclined connection plate 17 . Of course, the lower partition 16 can also be directly fixed to the vent pipe 18 .

In addition, a sealing plate is provided between the vent pipe 18 and the inner wall of the cylinder body 1 to ensure that the space above the vent pipe 18 is isolated from the space below, preventing the liquid from flowing under the vent pipe 18 and cannot be discharged.

For the liquid discharge assembly, the number of partitions and the height of each partition can be set according to the inner diameter of the cylinder 1 and the physical properties of the separated liquid.

In addition, in order for operators to enter the gas-liquid separator when the gas-liquid separator needs maintenance, a manhole 20 is provided on the side wall of the cylinder body 1, and the manhole 20 can be sealed by a flange.

It should be noted that when the gas-liquid separator provided by the present invention is used for gas-liquid separation, some gas-liquid mixtures are corrosive, so all components inside the cylinder 1 can be made of corrosion-resistant materials.

When the gas-liquid separator provided by the present invention is used for gas-liquid separation, the gas containing liquid droplets first enters the cyclone separation assembly from the inlet pipe 3 . Afterwards, the gas flows to the center of the cylinder 1 along the spiral channel formed by the spiral plate 2. At the same time, the gas will flow down due to the liquid mist droplets during the process, and the liquid contained in it will decrease as the gas-liquid separation process continues. The trend of upward flow, during the gas flow, the liquid contained in it adheres to the wall surface of the spiral plate 2 and forms droplets, and these droplets flow down the wall surface of the spiral plate 2 to the liquid discharge assembly under the action of gravity. After the gas reaches the central position, on the one hand, due to the reduction of the liquid content in the gas, on the other hand, due to the pressure, it flows upward from the center of the cylinder 1 to the screen part 5, and then flows out from the outlet pipe 7. The liquid droplets further separated from the screen part 5 fall on the annular upper baffle 11 , then flow to the liquid discharge assembly through the middle liquid discharge pipe 9 , and finally the liquid is discharged through the liquid discharge port 13 .

Therefore, inside the cylinder 1, the gas undergoes two gas-liquid separations, thereby significantly improving the gas-liquid separation efficiency. In addition, since most of the liquid droplets contained in the gas are separated by the cyclone separation component, the cyclone separation component can separate more than 85% of the liquid droplets in the gas, so it will not cause the screen to be blocked, and the efficiency of the gas-liquid separator is improved. Long service life and reduced maintenance costs.

The specific embodiments of the present invention have been described in detail above. Although some embodiments have been shown and described, those skilled in the art should understand that without departing from the principle and spirit of the present invention whose scope is defined by the claims and their equivalents Under the circumstances, these embodiments can be modified and improved, and these modifications and improvements should also be within the protection scope of the present invention.

Claims (11)

1. A gas-liquid separator, characterized in that, comprising: A cylinder, an air inlet pipe is connected to the outer wall of the cylinder along its horizontal tangential direction, and an air outlet pipe is connected to the upper end of the cylinder; The cyclone separation assembly is arranged inside the cylinder, including a spiral plate spirally extending from the inner wall of the cylinder to the center to form a spiral channel, and the air inlet pipe communicates with the spiral channel; a wire mesh part arranged inside the cylinder and above the cyclone separation assembly; A liquid discharge assembly is arranged inside the barrel and below the cyclone separation assembly to discharge the separated liquid. 2. The gas-liquid separator according to claim 1, wherein the cyclone separation assembly also includes an annular upper baffle and an annular lower baffle respectively fixed on the upper and lower ends of the spiral plate, the annular The outer periphery of the upper baffle and the annular lower baffle are also fixed to the inner wall of the barrel, and the inner periphery corresponds to the inner layer of the spiral channel. 3. The gas-liquid separator according to claim 2, characterized in that, the upper end of the spiral plate and the annular upper baffle are in a conical shape protruding upward, and the lower end of the spiral plate and the annular The lower baffle is in the shape of a cone protruding downward. 4. The gas-liquid separator according to claim 3, wherein the taper of the annular lower baffle is larger than the taper of the annular upper baffle. 5. The gas-liquid separator according to claim 2, further comprising an intermediate drain pipe fixed on the outer wall of the cylinder, the upper end of the intermediate drain pipe communicates with the annular upper baffle The lower end of the space above is connected to the space below the cyclone separation assembly, and the lower wall of the upper end of the middle drain pipe is lower than the highest point of the annular upper baffle. 6. The gas-liquid separator according to claim 5, characterized in that, an on-off valve is installed on the intermediate discharge pipe. 7. The gas-liquid separator according to claim 1, wherein the air inlet pipe is located above the middle of the cyclone separation assembly. 8. The gas-liquid separator according to claim 1, further comprising a wire mesh flushing pipe arranged above the wire mesh to flush the wire mesh. 9. The gas-liquid separator according to claim 1, wherein the drain assembly comprises: A positioning plate, a part of the outer periphery of the positioning plate extends obliquely downward from the inner wall of the cylinder, and the other part does not contact the inner wall of the cylinder; The emptying pipe is connected to the outside of the cylinder, and one end of the emptying pipe located inside the cylinder is sealed, and a plurality of through holes are opened on the upper surface of the emptying pipe; Alternately arranged upper partitions and lower partitions, the upper ends of the upper partitions are fixed to the positioning plate, the lower ends of the lower partitions are fixed to the vent pipe, and the adjacent upper partitions and lower partitions do not touch; The liquid discharge port is opened on the side wall of the cylinder and is located on the upper part of the liquid discharge assembly. 10. The gas-liquid separator according to claim 9, wherein the lower end of the lower partition is fixed to the vent pipe through an inclined connecting plate. 11. The gas-liquid separator according to claim 9, wherein a sealing plate is provided between the vent pipe and the inner wall of the cylinder to prevent liquid from flowing under the vent pipe .