JP7144936B2 - gas-liquid separator - Google Patents

Description

The technology disclosed herein relates to a gas-liquid separator that separates gas and liquid.

For example, Patent Literature 1 discloses a gas-liquid separator provided in a heat exchanger. This gas-liquid separator has a plurality of impingement deflectors and a plurality of swirl vane members. The gas-liquid mixture is separated from the gas-liquid mixture by colliding with the impinging deflection plate. Further, the mixed fluid collides with the swirl vane member to become a swirling flow, and further collides with the impingement deflection plate to separate the gas and liquid.

JP-A-10-176889

By the way, in the gas-liquid separator as described above, the liquid separated from the mixed fluid by the collision of the mixed fluid with a plurality of collision deflection plates or the like collides with the inner peripheral surface of the atmosphere open pipe that forms the flow path of the mixed fluid. It spreads and drips. In other words, the separated liquid is exposed to the mixed fluid flowing into the impingement deflector plate, and there is a risk that the separated liquid will be caught in the mixed fluid and mixed again.

The technology disclosed herein has been made in view of this point, and its purpose is to efficiently separate the liquid from the mixed fluid.

The gas-liquid separator disclosed herein includes a flow pipe through which fluid flows, a trapping section through which the fluid flowing through the flow pipe can pass and which traps liquid contained in the passing fluid, and the trapping section. and a first discharge portion disposed outside the capture portion for discharging the liquid captured by the capture portion.

According to the gas-liquid separator, the liquid can be efficiently separated from the mixed fluid.

FIG. 1 is a front view of a gas-liquid separator. FIG. 2 is a cross-sectional view of the gas-liquid separator taken along line II-II of FIG. FIG. 3 is a perspective view of the gas-liquid separator cut along line II-II of FIG. FIG. 4 is a plan view of the connecting plate. FIG. 5 is a plan view of the demister.

Exemplary embodiments are described in detail below on the basis of the drawings.

FIG. 1 is a front view of the gas-liquid separator 100. FIG. FIG. 2 is a cross-sectional view of the gas-liquid separator 100 along line II-II of FIG. FIG. 3 is a perspective view of the gas-liquid separator 100 cut along line II-II of FIG.

The gas-liquid separator 100 is arranged to surround at least part of the flow pipe 1 through which the fluid flows, the demister 4 that captures the liquid contained in the fluid, and at least part of the flow pipe 1. It has an outer tube 5 forming a double tube and a first discharge section 8 through which the liquid trapped in the demister 4 is discharged. The gas-liquid separator 100 separates at least part of the liquid from the mixed fluid of gas and liquid flowing through the flow pipe 1 by the demister 4, and at least part of the liquid is separated from the mixed fluid. The liquid separated by the demister 4 is discharged from the first discharge part 8 . Here, in the gas-liquid separator 100, air mixed with minute water droplets (mist) is taken as an example of the mixed fluid, and water is an example of the liquid separated from the mixed fluid. Hereinafter, air mixed with water droplets is referred to as "mixed air".

The flow pipe 1 has an upstream pipe 2 and a downstream pipe 3 positioned downstream of the upstream pipe 2 in the direction of flow of the fluid and extending in a bending direction with respect to the upstream pipe 2 . The upstream pipe 2 and the downstream pipe 3 are separated.

The upstream pipe 2 extends along an axis X1 extending substantially horizontally. A flange 21 is provided at the upstream end of the upstream pipe 2 . A downstream end 22 of the upstream pipe 2 has a shape cut by a plane (plane) inclined with respect to the axis X1. Specifically, the lower portion of the downstream end 22 of the upstream pipe 2 extends further downstream. The fluid flowing through the upstream pipe 2 flows along the axis X1. The fluid flowing out from the downstream end 22 of the upstream pipe 2 also flows out in the direction of the axis X1.

The downstream pipe 3 extends along an axis X2 extending substantially vertically. The axis X2 is substantially orthogonal to the axis X1. A lower end of the downstream pipe 3 is an upstream end into which the fluid flowing out from the upstream pipe 2 flows. The upper end of the downstream pipe 3 is a downstream end from which the fluid flowing through the downstream pipe 3 flows out. The fluid flows through the downstream pipe 3 from bottom to top. By separating the upstream pipe 2 and the downstream pipe 3 , an opening 31 a is formed at the upstream end of the downstream pipe 3 .

An upstream end 31 of the downstream pipe 3 has a shape that is cut by a plane that is inclined with respect to the axis X2. Specifically, the portion of the upstream end 31 of the downstream pipe 3 that is located on the downstream side in the direction of the axis X1 of the upstream pipe 2 extends downward. The upstream end 31 of the downstream pipe 3 generally faces the downstream end 22 of the upstream pipe 2 . As a result, the inner peripheral surface of the upstream end of the downstream pipe 3 is located ahead of the direction in which the fluid flows out from the upstream pipe 2 (that is, the direction of the axis X1). That is, the upstream pipe 2 causes the fluid to flow out toward the inner peripheral surface of the upstream end of the downstream pipe 3 .

Fluid flowing from the upstream pipe 2 into the downstream pipe 3 collides with the inner peripheral surface of the upstream end of the downstream pipe 3 . The downstream tube 3 deflects the flow of fluid entering through the upstream tube 2 and directs it upward to the downstream end. Further, when the fluid flowing through the upstream pipe 2 collides with the inner peripheral surface of the downstream pipe 3, the liquid separates from the fluid and adheres to the inner peripheral surface. The liquid adhering to the inner peripheral surface travels downward along the inner peripheral surface and drops downward from the opening 31 a of the downstream pipe 3 . The opening 31a serves as a second discharge portion for the liquid adhering to the inner peripheral surface.

A connecting plate 6 is joined to the downstream end of the downstream pipe 3 . 4 is a plan view of the connecting plate 6. FIG. 2 and 4, the connecting plate 6 includes a substantially circular inner ring 61 centered on the axis X2, a substantially circular outer ring 62 arranged coaxially with the inner ring 61, and the inner ring 61. and a plurality of connecting portions 63 connecting the outer ring 62 with the outer ring 62 . In other words, a communication hole 64 is formed through the center of the connecting plate 6 . A plurality of discharge holes 65 are formed through the connection plate 6 around the circulation hole 64 so as to surround the circulation hole 64 . The downstream end of the downstream pipe 3 is joined to the inner ring 61 by welding or the like.

FIG. 5 is a plan view of the demister 4. FIG. In addition, in FIG. 5, the communication hole 64 and the discharge hole 65 of the connecting plate 6 are illustrated by two-dot chain lines. The demister 4 is installed on the upper surface of the connecting plate 6, as shown in FIG. As shown in FIG. 5, the demister 4 is generally shaped like a disk. The demister 4 is formed by weaving metal wires into a mesh. In other words, the demister 4 is formed with a plurality of through holes 41 by the intertwined wires, and is configured so that the fluid can pass therethrough. 2 and 5, the demister 4 is simplified and shown in a simple lattice shape, but the actual demister 4 may be formed by intricately intertwining a plurality of metal wires. The demister 4 covers the entire surfaces of the flow holes 64 and the discharge holes 65 . That is, the demister 4 has a central portion 42 that covers the entire area of the flow hole 64 and a peripheral edge portion 43 that is located on the outer periphery of the central portion 42 and covers the entire area of the discharge hole 65 . The central portion 42 is an example of a supplementary portion that allows the fluid flowing through the flow pipe 1 to pass through and traps liquid contained in the passing fluid.

Thus, the demister 4 is provided at the downstream end of the downstream pipe 3 via the connecting plate 6 . That is, the demister 4 is arranged above the upstream end of the downstream pipe 3 where the fluid from the upstream pipe 2 flows.

The outer tube 5 extends coaxially with the downstream tube 3, that is, along the axis X2. Specifically, the outer tube 5 includes a substantially cylindrical main body 51, a first outflow portion 52 and a second outflow portion 53 provided at the upper end of the main body 51, and a discharge portion 54 provided at the lower end of the main body 51. have. The mixed fluid from which at least part of the liquid has been separated flows out from the second outlet 53 , while the separated liquid is discharged from the outlet 54 to the outside of the outer tube 5 .

An upstream pipe 2 is provided on the peripheral wall of the main body 51 . The upstream pipe 2 passes through the peripheral wall of the main body 51 and is joined to the peripheral wall by welding or the like. The upper end of the main body 51 is joined to the outer ring 62 of the connecting plate 6 by welding or the like. That is, the downstream pipe 3 and the main body 51 are connected via the connecting plate 6 . The downstream tube 3 and the body 51 are arranged coaxially to form a double tube.

The first outflow portion 52 and the second outflow portion 53 are formed in a substantially cylindrical shape. Although not shown, the first outflow portion 52 is attached to the connecting portion 63 of the connecting plate 6 with screws. The demister 4 is sandwiched between the first outflow portion 52 and the connecting plate 6 . The first outflow portion 52 and the second outflow portion 53 are joined by clamping members (not shown) between the flanges provided on the respective edges.

The discharge portion 54 is formed in a substantially cylindrical shape. The discharge part 54 is attached to the lower end of the main body 51 with screws. At this time, the auxiliary demister 7 is sandwiched between the discharge portion 54 and the main body 51 . The auxiliary demister 7, like the demister 4, is formed by weaving metal wires into a mesh.

The first discharge portion 8 is formed by a discharge passage 81 formed between the flow pipe 1 and the outer pipe 5 and the discharge hole 65 of the connecting plate 6 . That is, the first discharge portion 8 is arranged outside the central portion 42 of the demister 4 (that is, the portion of the demister 4 that covers the flow hole 64). The water captured by the demister 4 enters the discharge passage 81 through the discharge hole 65 and flows downward along the outer peripheral surface of the downstream pipe 3 or the inner peripheral surface of the outer pipe 5 . Water traveling along the outer peripheral surface of the downstream pipe 3 drips downward from the upstream end 31 of the downstream pipe 3 , that is, to the discharge portion 54 . Water traveling along the inner peripheral surface of the outer tube 5 travels downward along the inner peripheral surface of the outer tube 5 and reaches the discharge portion 54 .

The flow of fluid in the gas-liquid separator 100 configured in this way will be described.

First, mixed air flows into the upstream pipe 2 of the flow pipe 1 . The mixed air flows downstream through the upstream tube 2 and exits the downstream end 22 of the upstream tube 2 . Mixed air from the upstream pipe 2 flows out in a direction generally along the axis X1. The upstream end of the downstream pipe 3 is positioned ahead in the direction along the axis X1. An end surface of the upstream end of the downstream pipe 3 is inclined with respect to the axis X2, and a part of the inner peripheral surface of the downstream pipe 3 is exposed toward the downstream end of the upstream pipe 2 . Therefore, the mixed air flowing out of the upstream pipe 2 collides with the inner peripheral surface of the upstream end portion of the downstream pipe 3 that extends further downstream in the direction of the axial center X2. The mixed air that collides with the inner peripheral surface of the downstream pipe 3 is reflected by the inner peripheral surface and flows upward. That is, the downstream pipe 3 deflects the direction of the flow of the mixed air entering through the upstream pipe 2 and directs the mixed air toward the demister 4 . Here, since the inner peripheral surface of the downstream pipe 3 is curved, part of the mixed air can become a swirling flow.

At this time, when the mixed air collides with the inner peripheral surface of the downstream pipe 3 , some water droplets are separated from the mixed air and adhere to the inner peripheral surface of the downstream pipe 3 . The water adhering to the inner peripheral surface of the downstream pipe 3 travels downward along the inner peripheral surface and drops from the opening 31 a of the downstream pipe 3 to the lower portion of the outer pipe 5 , that is, the discharge portion 54 .

On the other hand, the mixed air flowing through the downstream pipe 3 passes through the central portion 42 of the demister 4 . The mixed air is separated from the air by water droplets adhering to the metal wires as it passes through the holes 41 of the demister 4 . At least some water droplets are separated from the air that has passed through the demister 4 . The air that has passed through the demister 4 flows out from the second outflow portion 53 .

In the demister 4, water separated from the mixed air first adheres to the central portion 42. As shown in FIG. Since mixed air passes through the central portion 42 one after another, the water adhering to the central portion 42 is gradually pushed away from the central portion 42 . A peripheral portion 43 is positioned outside the central portion 42 . The water pushed to the peripheral portion 43 flows into the discharge passage 81 through the discharge holes 65 . Since almost no mixed air flows through the discharge passage 81 , the water flowing into the discharge passage 81 smoothly falls to the lower portion of the outer tube 5 .

Thus, the discharge hole 65 and the discharge passage 81 through which the water separated by the demister 4 passes are separated from the interior of the downstream pipe 3 through which the mixed air flows, so that the separated water is mixed again with the mixed air. can be prevented. As a result, water can be efficiently separated from the mixed air.

Furthermore, as a configuration for separating water from the mixed air, a configuration in which the mixed air collides with a plurality of impingement deflection plates or a plurality of swirl vane members as in Patent Document 1 is also conceivable, but in the case of such a configuration, the structure Can be complex and large. On the other hand, in the above-described configuration, only the trapping portion such as the demister 4 and the first ejection portion such as the ejection hole 65 and the ejection passage 81 are provided outside the trapping portion, so the structure can be simplified and made compact. can. Furthermore, the mixed air only passes through the demister 4 and does not need to repeatedly collide with the plurality of collision deflection plates and the plurality of swirl vane members, so the pressure loss of the mixed air can be reduced.

As described above, the gas-liquid separator 100 includes the flow pipe 1 through which the mixed air (fluid) flows, and the mixed air flowing through the flow pipe 1 can pass through. and a discharge hole 65 and a discharge passage 81 (first discharge portion) arranged outside the central portion 42 and through which the water trapped in the central portion 42 is discharged. and

According to this configuration, when the mixed air flowing through the flow pipe 1 passes through the central portion 42 of the demister 4, the central portion 42 captures water droplets in the mixed air. Water trapped in the central portion 42 is forced outside the central portion 42 as the air mixture continues to pass through the central portion 42 . Since the discharge hole 65 and the discharge passage 81 are located outside the central portion 42 , the water pushed to the outside of the central portion 42 is discharged from the discharge hole 65 and the discharge passage 81 . In this way, the water trapped in the central portion 42 is discharged through the discharge hole 65 and the discharge passage 81 instead of the circulation pipe 1 through which the mixed air flows, so that it is caught in the mixed air and Mixing again is suppressed. As a result, water can be efficiently separated from the mixed air.

In addition, the gas-liquid separator 100 further includes an outer pipe 5 which is disposed so as to surround the flow pipe 1 and forms a double pipe together with the flow pipe 1. A discharge passage 81 extends between the flow pipe 1 and the outer pipe 5. formed between.

According to this configuration, the circulation tube 1 and the outer tube 5 form a double tube, and the discharge passage 81 is formed outside the circulation tube 1 between the circulation tube 1 and the outer tube 5, The mixed air flow path and the separated water flow path can be partitioned. In addition, the flow path 1 and the discharge path 81 can be formed compactly, and thus the gas-liquid separator 100 can be formed compactly.

Further, the flow pipe 1 has an upstream pipe 2 and a downstream pipe 3 located downstream of the upstream pipe 2 and extending in a direction bending with respect to the upstream pipe 2. 3 , the downstream tube 3 deflects the flow of fluid entering through the upstream tube 2 and directs it toward the central portion 42 .

According to this configuration, the mixed air flowing through the upstream pipe 2 and the downstream pipe 3 in this order is reflected by the inner peripheral surface of the downstream pipe 3 . Due to this reflection, in the mixed air entering the central portion 42 of the demister 4, the component entering in a direction inclined with respect to the central portion 42 and the component entering the central portion 42 while swirling increase. As a result, compared to the case where the mixed air enters the central portion 42 vertically, the mixed air adheres to the central portion 42 more when the mixed air enters the central portion 42 in an inclined direction or while rotating. It becomes easier to push water away from the outside of the central portion 42 . That is, the discharge of the water captured by the central portion 42 from the first discharge portion 8 is facilitated.

In addition, the central portion 42 of the demister 4 is arranged above the portion of the downstream pipe 3 into which the mixed air from the upstream pipe 2 flows. A second discharge portion is provided for discharging the water adhering to the inner peripheral surface of the mixed air separated from the mixed air by colliding with the inner peripheral surface of the downstream pipe 3 . is located at a position lower than the central portion 42 of the .

According to this configuration, the second discharge portion is positioned below the central portion 42 of the demister 4, and the portion into which the mixed air from the upstream pipe 2 flows is between the central portion 42 and the second discharge portion. positioned. Therefore, mixed air flowing into the downstream pipe 3 from the upstream pipe 2 flows upward in the downstream pipe 3 and enters the central portion 42 of the demister 4 . The water adhering to the inner peripheral surface of the downstream pipe 3 while the mixed air flows through the downstream pipe 3 travels downward along the inner peripheral surface due to its own weight. Since the downstream pipe 3 is provided with the second discharge portion at a position lower than the central portion 42 of the demister 4, the water flowing down the inner peripheral surface is naturally discharged from the second discharge portion. go.

More specifically, the upstream pipe 2 and the downstream pipe 3 are separated, and the inner peripheral surface of the upstream end portion of the downstream pipe 3 is positioned ahead of the flow direction of the fluid from the upstream pipe 2. , the central part 42 of the demister 4 is arranged above the upstream end of the downstream pipe 3 and the second discharge part is formed by the opening 31 a of the upstream end 31 of the downstream pipe 3 .

According to this configuration, the upstream end 31 of the downstream pipe 3 is formed with an opening 31 a by separating the upstream pipe 2 and the downstream pipe 3 . This opening 31a serves as a second discharge portion for discharging water adhering to the inner peripheral surface of the downstream pipe 3. As shown in FIG. A central portion 42 of the demister 4 is arranged above the opening 31a.

Further, the upstream end 31 of the downstream pipe 3 has a shape that is cut by a plane that is inclined with respect to the axial center X2 of the downstream pipe 3 .

According to this configuration, a part of the inner peripheral surface of the upstream end of the downstream pipe 3 is exposed laterally (that is, in a direction intersecting the axis X2). Therefore, in the structure in which the upstream pipe 2 and the downstream end 3 extend so as to bend with each other, the structure in which the mixed air is directed from the upstream pipe 2 toward the inner peripheral surface of the upstream end of the downstream pipe 3 can be easily realized. .

More specifically, the upstream pipe 2 causes the fluid to flow out toward the inner peripheral surface of the upstream end portion of the downstream pipe 3 that extends further upstream in the direction of the axial center X2 of the downstream pipe 3 .

If the upstream end 31 has a shape cut by a plane perpendicular to the axis X2, the position of each part of the upstream end 31 in the direction of the axis X2 is the same at any position in the circumferential direction of the upstream end 31. be. However, in the case where the upstream end 31 of the downstream pipe 3 has a shape cut by an inclined surface as described above, the position of each portion of the upstream end 31 in the direction of the axis X2 is the position of the upstream end 31 in the circumferential direction. Varies depending on A certain portion of the upstream end 31 is located lower than other portions of the upstream end 31 in the direction of the axis X2. The fluid flows out from the upstream pipe 2 toward the inner peripheral surface of the upstream end portion of the downstream pipe 3 that extends further upstream in the direction of the axial center X2 of the downstream pipe 3 . As a result, the mixed air can be directed from the upstream pipe 2 toward the inner peripheral surface of the upstream end of the downstream pipe 3 .

A central portion 42 of the demister 4 is formed with a plurality of through holes 41 through which fluid passes.

This configuration allows mixed air to pass through the central portion 42 through the through holes 41 . When the mixed air passes through the through hole 41, it contacts the portion of the central portion 42 that defines the through hole 41, and water is separated from the mixed air.

<<Other embodiments>>
As described above, the embodiments have been described as examples of the technology disclosed in the present application. However, the technology in the present disclosure is not limited to this, and can be applied to embodiments in which modifications, replacements, additions, omissions, etc. are made as appropriate. Moreover, it is also possible to combine the constituent elements described in the above embodiments to create new embodiments. In addition, among the components described in the attached drawings and detailed description, there are not only components essential for solving the problem, but also components not essential for solving the problem in order to exemplify the above technology. can also be included. Therefore, it should not be immediately recognized that those non-essential components are essential just because they are described in the attached drawings and detailed description.

The gas-liquid separator 100 is intended for air mixed with minute water droplets as a mixed fluid of gas and liquid, but the types of gas and liquid are not limited to these. For example, the gas may be steam.

The catching portion may be a member other than the demister 4 . For example, the catching portion may be a wire mesh, a grating, a plate having a plurality of through holes, or the like.

Also, the first discharge portion is not limited to the discharge hole 65 and the discharge passage 81 . For example, the circulation pipe 1 may extend downstream from the demister 4 , and a discharge hole as a first discharge portion may be formed through the peripheral wall of the portion of the circulation pipe 1 immediately downstream of the demister 4 . In this configuration, the liquid trapped in the demister 4 is pushed outside the demister 4 and discharged outside the flow pipe 1 through the discharge holes of the flow pipe 1 .

The flow pipe 1 has a structure in which the upstream pipe 2 and the downstream pipe 3 are separated, but the structure is not limited to this. When the upstream pipe 2 and the downstream pipe 3 are integrally formed, the inner peripheral surface of the flow pipe 1 is formed on the portion of the flow pipe 1 on the downstream side of the central portion 42 (capture portion) of the demister 4. It is preferable to provide an opening or the like as a second discharge portion for discharging the liquid adhering to the surface.

Also, the upstream pipe 2 extends substantially horizontally, and the downstream pipe 3 extends substantially vertically, but they are not limited to these. The downstream end of the downstream pipe 3 is preferably located above the upstream end of the downstream pipe 3 from the viewpoint of discharging the liquid adhering to the inner peripheral surface of the downstream pipe 3 by its own weight. For example, the downstream pipe 3 may extend obliquely upward from the upstream end to the downstream end.

As described above, the technology disclosed herein is useful for gas-liquid separators.

100 Gas-liquid separator 1 Flow pipe 2 Upstream pipe 3 Downstream pipe 31 Upstream end 31a Opening (second discharge part)
41 Through hole 42 Central part (capturing part)
5 outer pipe 65 discharge hole (first discharge part)
81 discharge path (first discharge part)

Claims (8)

a flow pipe through which a fluid flows;
a trapping portion through which the fluid flowing through the flow tube can pass and traps liquid contained in the passing fluid;
a first discharge section disposed outside the capture section for discharging the liquid captured by the capture section;
The flow pipe has an upstream pipe and a downstream pipe positioned downstream of the upstream pipe in the direction of flow of the fluid,
The capture unit is provided in the downstream pipe,
The downstream pipe partitions the inside of the downstream pipe and the first discharge part so that the fluid that flows through the downstream pipe and has not passed through the capture part does not flow into the first discharge part. separator. In the gas-liquid separator according to claim 1,
further comprising an outer tube arranged to surround the downstream tube and forming a double tube together with the downstream tube;
The gas-liquid separator, wherein the first discharge part is a discharge passage formed between the downstream pipe and the outer pipe. In the gas-liquid separator according to claim 2,
the downstream pipe extends in a bending direction with respect to the upstream pipe,
The gas-liquid separator, wherein the downstream pipe deflects the flow direction of the fluid flowing in through the upstream pipe and directs the fluid to the trapping section. In the gas-liquid separator according to claim 3,
The capture section is arranged above a portion of the downstream pipe into which the fluid from the upstream pipe flows,
The downstream pipe is provided with a second discharging portion for discharging the liquid adhering to the inner peripheral surface of the downstream pipe separated from the fluid that has flowed through the upstream pipe by colliding with the inner peripheral surface of the downstream pipe. is provided,
The gas-liquid separator, wherein the second discharge section is arranged at a position lower than the capture section. In the gas-liquid separator according to claim 4,
The upstream pipe and the downstream pipe are separated,
an inner peripheral surface of an upstream end portion of the downstream pipe is located ahead of the direction in which the fluid flows out from the upstream pipe,
The capture section is arranged above an upstream end of the downstream pipe,
The gas-liquid separator, wherein the second discharge part is formed by an opening at the upstream end of the downstream pipe. In the gas-liquid separator according to claim 5,
The gas-liquid separator, wherein the upstream end of the downstream pipe has a shape cut by a plane that is inclined with respect to the axial center of the downstream pipe. a flow pipe through which a fluid flows;
a trapping portion through which the fluid flowing through the flow tube can pass and traps liquid contained in the passing fluid;
a first discharge section disposed outside the capture section for discharging the liquid captured by the capture section;
an outer tube disposed so as to surround the circulation tube and forming a double tube together with the circulation tube;
The first discharge portion is a discharge passage formed between the flow pipe and the outer pipe,
The flow pipe has an upstream pipe and a downstream pipe located downstream of the upstream pipe and extending in a direction bending with respect to the upstream pipe,
The upstream pipe and the downstream pipe are separated,
an inner peripheral surface of an upstream end portion of the downstream pipe is located ahead of the direction in which the fluid flows out from the upstream pipe,
The capture section is arranged above an upstream end of the downstream pipe,
the downstream pipe deflects a flow direction of the fluid flowing through the upstream pipe and directs the fluid toward the trap;
The downstream pipe is provided with a second discharging portion for discharging the liquid adhering to the inner peripheral surface of the downstream pipe separated from the fluid that has flowed through the upstream pipe by colliding with the inner peripheral surface of the downstream pipe. is provided,
the second discharge portion is positioned lower than the capture portion and is formed by an opening at the upstream end of the downstream pipe;
the upstream end of the downstream pipe has a shape cut by a plane that is inclined with respect to the axial center of the downstream pipe;
The upstream pipe is a gas-liquid separator that causes the fluid to flow out toward an inner circumferential surface of an upstream end portion of the downstream pipe that extends further upstream in the axial direction of the downstream pipe. In the gas-liquid separator according to any one of claims 1 to 7,
The trapping portion is a gas-liquid separator having a plurality of through holes through which fluid passes.

Images