JP6466257B2 - Gas-liquid separator - Google Patents

Description

  The present invention relates to a gas-liquid separator that separates liquid and gas from a mixed fluid containing liquid (water, etc.) and gas (air, gas, etc.).

  For example, an EGR (Exhaust Gas Recirculation) system is known as one of systems (devices) for purifying exhaust gas from an internal combustion engine. In the EGR system, by cooling the EGR gas that is recirculated into the combustion chamber, the combustion temperature can be lowered, thereby reducing the amount of NOx (nitrogen oxide) emissions. When the EGR gas is cooled, moisture contained in the EGR gas is condensed and condensed water is generated in the EGR flow path. In an environment where the outside air temperature is 0 ° C. or less, condensed water is more likely to be generated.

  Since EGR gas contains sulfur in the fuel, the condensed water in the EGR flow path contains sulfuric acid. If this condensed water containing sulfuric acid adheres to or stays in the EGR flow path or the combustion chamber of the internal combustion engine, etc., each part of the internal combustion engine (EGR flow path, EGR valve, intake flow path, combustion chamber, etc.) is corroded or damaged, etc. It is thought to cause. It is also conceivable that the combustion chamber of the internal combustion engine sucks in a large amount of condensed water, thereby causing damage to the internal combustion engine due to a so-called water hammer.

  Therefore, a gas-liquid separator (or a gas-water separator), a water absorbing material (filter), or the like is used to remove condensed water from the EGR gas. As the gas-liquid separator, for example, a cyclone type gas-liquid separator is known. This cyclone type gas-liquid separator is a system that separates liquid and gas by introducing a gas containing liquid in a tangential direction into the separation cylinder, and forming a swirl flow in the separation cylinder. In general, the separated liquid is discharged from the lower part of the separation cylinder and only the gas is taken out from the upper part of the separation cylinder. In addition, there has also been proposed a barrier provided in the separation cylinder for suppressing the rotation of the separation liquid in order to enhance the separation performance by promoting the discharge of the separation liquid from the separation cylinder (see Patent Document 1). Furthermore, the condensate collecting part which collects the condensate produced from EGR gas by the uneven | corrugated | grooved part provided in the inner wall of the EGR gas flow path of the EGR gas flow downstream is provided, and it collected by this condensate collection part An EGR device that stores and stores condensed water in a storage section has also been proposed (see Patent Document 2). For example, an exhaust gas recirculation device (see Patent Document 3) in which a water absorbing material is provided on a foreign matter collecting filter protruding from the inner wall surface of the exhaust pipe into the exhaust gas flow path is known as a device that employs a water absorbing material, a filter, or the like. It has been.

JP-A-9-220421 JP 2013-29081 A JP 2012-202265 A

However, the conventional gas-liquid separation means described above has the following drawbacks.
That is, a cyclone type gas-liquid separation device or an EGR gas flow path that separates liquid and gas by introducing gas containing liquid into the separation cylinder in a tangential direction and forming a swirl flow in the separation cylinder In the case of an apparatus for gas-liquid separation with a built-in condensed water collecting part, the moisture collecting action is limited, and it cannot cope with a wide range of gas flow rates such as a flow rate of 10 to 100 m / s. Furthermore, there is little empty space in the vehicle engine room, and it is difficult to install a relatively large gas-liquid separator such as a cyclone system. Further, in the case of an exhaust gas recirculation device, a separation member such as a filter or a water absorbing material is disposed in the separation container, so that the ventilation resistance is high and the ventilation resistance is increased even in a region where there is a large amount of air and a high flow velocity. On the other hand, a load is applied, resulting in deterioration of fuel consumption.

  The present invention has been made in order to eliminate the disadvantages of the conventional gas-liquid separation means described above. By eliminating the separation member such as a filter and a water-absorbing material and reducing the air flow resistance, the flow rate is 10 to 100 m / s. Thus, the present invention is intended to provide a gas-liquid separation device that can cope with a wide range of gas flow rates as described above and can be installed in a narrow place such as an engine room of a vehicle and has high collection efficiency.

The gas-liquid separation device according to the present invention introduces a liquid-gas mixed fluid (hereinafter referred to as “gas-liquid mixed fluid” for convenience of description) into the separation container, and the gas-liquid mixed fluid is supplied to the inner wall of the separation container. A gas-liquid separation device that separates liquid and gas by colliding with each other, wherein a gas-liquid mixed fluid inlet pipe is opened and connected to a side surface of the separation container, and an inner wall surface facing the inlet pipe And a gas outlet pipe with an opening projecting into the separation container is connected to the upper surface of the separation container, and the separated liquid droplets separated from the collision wall are separated from the gas-liquid mixture. An inclined bottom surface portion for collecting liquid on the mixed fluid inlet pipe side, and a box-shaped liquid collecting portion provided between the inclined bottom surface portion and the gas-liquid mixed fluid inlet side inner wall surface of the separation container; A semi-circle or circle that is continuous with the part and protrudes into the box-shaped liquid collecting part It has Jo protrusions, and is characterized in that the liquid recovery tank through the drain pipe to the box shape liquid collection unit is no connected thereto.

In the gas-liquid separation device according to the present invention , the positional relationship between the gas-liquid mixed fluid inlet pipe and the separated gas outlet pipe is arranged with the longest offset of the separation container, and the gas-liquid mixed fluid collision wall is roughened. It is preferable that the surface of the gas outlet pipe is 5 to 20 mm, and the inclination angle of the inclined bottom surface portion is 10 to 20 degrees.

  The gas-liquid separation device of the present invention eliminates a separation member such as a filter and a water-absorbing material in the gas-liquid separation container to reduce ventilation resistance, and causes the gas-liquid mixed fluid to collide with the inner wall surface of the separation container for gas-liquid separation. By adopting this method, not only can the apparatus be miniaturized, but it can sufficiently handle a wide range of gas flow rates such as a flow rate of 10 to 100 m / s, and has a great effect on improving the fuel consumption of an internal combustion engine. Play. Also, the gas-liquid mixed fluid introduced into the separation container is placed in the gas outlet by arranging the positional relationship between the gas-liquid mixed fluid inlet pipe and the gas outlet pipe separated from the gas-liquid mixed fluid at the longest offset of the separation container. Since direct discharge from the pipe can be suppressed, the gas-liquid mixed fluid can be processed efficiently. Furthermore, by making the collision wall surface of the gas-liquid mixed fluid in the separation container rough, it is possible to efficiently form droplets by surface collision and increase the droplet collection efficiency. In addition, by providing a liquid recovery tank at the bottom of the separation vessel via a drainage pipe, the collected droplets are prevented from being rolled up into the separation vessel, and the drop in the droplet collection rate at high flow rates is suppressed. it can. Furthermore, by making the protruding length in the separation container of the gas outlet pipe 5 to 20 mm, it is possible to more effectively suppress the liquid droplet suction from the gas outlet pipe, and the inclination angle of the inclined bottom surface portion of the separation container can be reduced. By setting the angle to 10 to 20 degrees, the gas and the liquid droplet after separation can be more effectively collected in the drainage part. In addition, the liquid collection part connected to the inclined bottom surface part of the separation container is formed into a box shape having a desired depth, and the terminal part of the inclined bottom surface part is formed in a semicircular shape or an arc shape to protrude into the box-shaped liquid collection part. As a result, the liquid droplets that have flowed down the inclined bottom surface part fall along the end of the inclined bottom surface part and accumulate in the box-shaped liquid collecting part to improve the liquid collecting property, and also the swirl flow in the separation container. It is possible to prevent the droplets from being rolled up.

It is a perspective view which partially fractures and shows the gas-liquid separation apparatus of the reference example 1 relevant to the gas-liquid separation apparatus which concerns on this invention. It is a top view of the gas-liquid separator shown in FIG. It is explanatory drawing which shows the gas-liquid separation operation | movement of the gas-liquid mixed fluid of the gas-liquid separator shown in FIG. 1, FIG. 2, (a) is a schematic front view, (b) is a schematic plan view. It is a perspective view which partially fractures and shows the gas-liquid separator of the reference example 2 relevant to the gas-liquid separator which concerns on this invention. 1 is a perspective view showing a partially broken embodiment of a gas-liquid separator according to the present invention. FIG. 6 is a view corresponding to FIG. 3A of the gas-liquid separator shown in FIG. 5. It is a longitudinal cross-sectional view which shows the cross-sectional shape example of the inclination bottom face part termination | terminus part of the gas-liquid separator shown in FIG. 5, (a) is the combined shape of an arc-shaped part and a horizontal part, (b) is an arc-shaped part and a slope. The combination shape with the part is shown respectively.

Hereinafter, reference examples 1 and 2 and embodiments of the present invention will be described with reference to the drawings.
1 to 7, 1, 11 and 21 are gas-liquid separators, 2, 12 and 22 are gas-liquid separation containers, 2-1, 12-1 and 22-1 are collision wall surfaces of gas-liquid mixed fluid, 2 -2, 12-2 and 22-2 are inclined bottom surface portions, 2-3 and 12-3 are liquid collecting portions composed of horizontal bottom surface portions, 22-3 is a box-shaped liquid collecting portion, and 22-2a is an inclined bottom surface portion. The semicircular projecting part, 22-2b is the arcuate projecting part of the inclined bottom surface part, 3, 13, 23 are gas-liquid mixed fluid inlet pipes, 4, 14, 24 are gas outlet pipes, 5, 15, 25 are exhausted The liquid pipes 6, 16, and 26 are liquid recovery tanks (water storage tanks and the like).

1, the gas-liquid separator 1 of Reference Example 1 shown in FIG. 2, a gas-liquid separation vessel 2 of box-shaped, gas-liquid separation horizontally connected to the side portions of the container are gas-liquid mixed fluid inlet pipe 3, And a gas outlet pipe 4 perpendicularly connected to the upper surface portion of the same gas-liquid separation container, and a liquid recovery tank 6 connected to the bottom surface portion of the same gas-liquid separation container. The inner wall surface facing the gas-liquid mixed fluid inlet pipe 3 serves as the collision wall surface 2-1 of the gas-liquid mixed fluid, and the bottom surface of the gas-liquid separation container connected to the collision wall surface 2-1 is the inclined bottom surface portion 2-2. The liquid recovery tank 6 is connected via a drainage pipe 5 to a liquid collecting part 2-3 consisting of a horizontal bottom face continuous to the lower end of the inclined bottom face 2-2.

  The gas-liquid mixed fluid inlet pipe 3 is connected horizontally such that the tip thereof opens to the gas-liquid separation container 2, and the gas outlet pipe 4 is open to the upper surface of the gas-liquid separation container 2. 2 are vertically connected so as to protrude into the area 2. The gas-liquid mixed fluid inlet pipe 3 and the gas outlet pipe 4 prevent the gas-liquid mixed fluid flowing into the gas-liquid separation container 2 from the gas-liquid mixed fluid inlet pipe 3 from being directly discharged from the gas outlet pipe 4. Therefore, as shown in FIG. 2, the gas-liquid mixed fluid inlet pipe 3 is provided at one end side with respect to the central position on the side surface of the separation container, and the gas outlet pipe 4 is arranged on the inlet pipe 3 with respect to the central position on the upper surface of the separation container. It is provided at the end opposite to and offset. Here, the protrusion length (protrusion allowance) of the protrusion 4-1 in the gas-liquid separation container 2 of the gas outlet pipe 4 is not particularly limited, but is preferably 5 to 20 mm. That is, if the protrusion length is less than 5 mm, the effect of suppressing the suction of the liquid droplets from the gas outlet pipe 4 is small, while if it exceeds 20 mm, the liquid collection to the drain pipe 5 side is suppressed.

  The inclined bottom surface portion 2-2 connected to the collision wall surface 2-1 of the gas-liquid separation container 2 has the gas-liquid mixed fluid flowing into the gas-liquid separation container 2 from the gas-liquid mixed fluid inlet pipe 3 into the collision wall surface 2-1. It is formed to collect liquid droplets that have collided and separated from gas on the gas-liquid mixed fluid inlet pipe 3 side, and the collision wall surface 2-1 side is high and the gas-liquid mixed fluid inlet pipe 3 side is low. . The inclination angle θ of the inclined bottom surface part 2-2 is not particularly limited, but is preferably set to 10 to 20 degrees. That is, when the inclination angle θ is less than 10 degrees, the collection rate of the liquid and separated droplets is small. On the other hand, when the inclination angle θ exceeds 20 degrees, the collection rate of the droplets is high, but on the inclined bottom surface portion 2-2. This is because the upper limit is preferably about 20 degrees in consideration of the flow state of the droplets (flow velocity, etc.), the relationship between the drainage pipe 5 and the liquid recovery tank 6 and the like.

  Furthermore, the liquid collection part 2-3 which consists of a horizontal bottom face part connected to the lower end of the inclined bottom face part 2-2 is provided with a drainage outlet 2-3a, and the drainage pipe 5 is connected to the drainage outlet 2-3a. A liquid recovery tank 6 is attached. Note that the position of the drainage outlet 2-3a is not particularly limited, and in consideration of the flow rate of the gas-liquid mixed fluid introduced into the gas-liquid separation container 2, the gas and the liquid droplets after separation are likely to accumulate. The location will be set.

  1 and FIG. 2, the gas-liquid mixed fluid M flowing into the gas-liquid separation container 2 from the gas-liquid mixed fluid inlet pipe 3 is shown in FIGS. 3 (a) and 3 (b). As described above, the gas G and the droplet W are separated by the inertial force and the centrifugal force while repeating the collision with the collision wall surface 2-1 while turning along the inner peripheral wall surface of the gas-liquid separation container 2. At that time, the separated gas G in the gas-liquid mixed fluid M flows out from the gas outlet pipe 4 on the upper surface of the separation container. However, the effect of suppressing the suction to the droplets W and the liquid collection to the drain pipe 5 side. Due to the action of the protruding portion 4-1 in the gas-liquid separation container 2 of the gas outlet pipe 4 set in consideration of the above, only the separated gas G is effectively taken out without sucking the droplets W. On the other hand, the separated droplet W falls on the inclined bottom surface portion 2-2 and flows downward on the upper surface of the inclined bottom surface portion to accumulate in the liquid collecting portion 2-3. At this time, the droplet W dropped on the upper surface of the inclined bottom surface portion 2-2 is provided with the inclined bottom surface portion 2 set at a desired inclination angle θ in consideration of the flow state (flow velocity, etc.) of the droplet. -2 is efficiently collected in the liquid collection part 2-3. The droplets W collected in the liquid collection unit 2-3 are collected in the liquid collection tank 6 through the drainage pipe 5 from the drainage port 2-3a. The liquid droplet W thus separated from the gas-liquid mixed fluid is collected in the liquid collection tank 6 separate from the gas-liquid separation container 2, so that the collected liquid is rolled up into the gas-liquid separation container 2. Is prevented, and a decrease in the liquid collection rate in the high flow rate region can be suppressed.

Next, the gas-liquid separation device 11 of Reference Example 2 shown in FIG. 4 uses the collision wall surface 2-1 of the gas-liquid mixed fluid of the gas-liquid separation container 2 shown in FIGS. 1 except that the gas-liquid separation device having the configuration shown in FIG. 1 and FIG. 2 has the same configuration as above. It is a gas-liquid separation device that can efficiently form droplets by means of and can increase the collection efficiency of the droplets.

That is, the structure is horizontally connected to the box-shaped gas-liquid separation container 12 and the side surface of the gas-liquid separation container, similarly to the gas-liquid separation apparatus 1 of Reference Example 1 shown in FIGS. A gas-liquid mixed fluid inlet pipe 13, a gas outlet pipe 14 connected perpendicularly to the upper surface of the gas-liquid separation container, and a liquid recovery tank 16 connected to the bottom surface of the gas-liquid separation container, The inner wall surface of the gas-liquid separation container 12 facing the gas-liquid mixed fluid inlet pipe 13 is a rough collision wall surface 12-1, and the bottom surface of the gas-liquid separation container connected to the collision wall surface 12-1 is the inclined bottom surface. A liquid recovery tank 16 is connected via a drainage pipe 15 to a liquid collecting part 12-3 formed of a horizontal bottom face continuous to the lower end of the inclined bottom face 12-2.

In the gas-liquid separation devices 1 and 11 of the reference examples 1 and 2, the collision wall surface of the gas-liquid mixed fluid is the rough collision wall surface 12-1. This is to facilitate adhesion. Here, the rough surface is such a roughness that the droplet particles are easily caught on the surface and do not hinder the flow of the airflow. For example, in the case of a mixed fluid having a particle size of several μm to several hundred μm in the gas-liquid mixed fluid, the surface treatment is such that the difference between the concave and convex portions on the surface of the collision surface is about several hundred μm to 5 mm. It is desirable to improve the collection rate by applying (unevenness formation). This numerical value varies depending on the flow velocity of the gas-liquid mixed fluid, the type of liquid droplet (water droplet, oil droplet, etc.), the internal shape of the gas-liquid separation container 12, and the like, and is not limited to the above numerical value. The rough collision wall surface 12-1 may be formed by providing a material that easily attaches droplets to the surface instead of the surface treatment. For example, a woven fabric or mesh body in which metal fibers such as stainless steel are woven in a mesh shape may be attached, and a material such as a synthetic resin or ceramic may be used as long as conditions such as heat resistance and corrosion resistance are satisfied.

  In the case of the gas-liquid separator 11 shown in FIG. 4, the gas-liquid mixed fluid inlet pipe 13 is opened at the tip of the gas-liquid separator 12 as in the case of the gas-liquid separator 1 shown in FIGS. The gas outlet pipe 14 is vertically connected to the upper surface portion of the gas-liquid separation container 12 so that the opening projects into the gas-liquid separation container 12. Similarly to the above, the gas-liquid mixed fluid inlet pipe 13 and the gas outlet pipe 14 are disposed at one end of the gas-liquid mixed fluid inlet pipe 13 with respect to the center position on the side surface of the separation container, and the gas outlet pipe 14 is separated. It is disposed offset from the center position of the upper surface of the container at the end opposite to the inlet pipe 13. The protruding length (protruding margin) of the protruding portion 14-1 in the gas-liquid separation container 12 of the gas outlet pipe 14 is preferably 5 to 20 mm, as described above.

  In addition, the inclined bottom surface portion 12-2 connected to the collision wall surface 12-1 of the gas-liquid separation container 12 also has the gas-liquid mixed fluid W flowing into the gas-liquid separation container 12 from the gas-liquid mixed fluid inlet pipe 13 as described above. In order to collect liquid droplets separated from the gas by colliding with the rough collision wall surface 12-1, the collision wall surface 12-1 side is high and the gas-liquid mixture fluid inlet tube 13 is high. The side is formed low. The inclination angle θ of the inclined bottom surface portion 12-2 is preferably set to 10 to 20 degrees as described above.

  Furthermore, the liquid collection part 12-3 which consists of a horizontal bottom face part connected to the lower end of the inclined bottom face part 12-2 is also provided with a drainage port 12-3a, and the drainage port 12-3a A liquid recovery tank 16 is attached via a drainage pipe 15. Note that the position of the drainage port 12-3a is not particularly limited, and in consideration of the flow rate of the gas-liquid mixed fluid introduced into the gas-liquid separation container 12, the gas and the liquid droplets after separation are likely to accumulate. Needless to say, the location is set.

  In the gas-liquid separation device 11 having the configuration shown in FIG. 4, the gas-liquid mixed fluid M that has flowed into the gas-liquid separation container 12 from the gas-liquid mixed fluid inlet pipe 13 flows along the inner peripheral wall surface of the gas-liquid separation container 12. The gas G and the droplet W are separated by inertia force or centrifugal force while repeating the collision with the collision wall surface 12-1 while turning, but in the case of this apparatus, the collision wall surface 12-1 is a rough surface. Therefore, more droplet particles in the gas-liquid mixed fluid adhere to the collision surface shown in FIGS. 1 and 2 than the collision wall surface on which the rough surface treatment is not performed, and the droplet formation rate is increased. The droplet W separated by colliding with the rough collision wall surface 12-1 falls on the inclined bottom surface portion 12-2 and flows downward on the upper surface of the inclined bottom surface portion to collect in the liquid collecting portion 12-3. The liquid is recovered into the liquid recovery tank 16 through the drainage pipe 15 from the drainage port 12-3a. In the case of the apparatus of the present embodiment as well, the liquid droplets separated from the gas-liquid mixed fluid are recovered in the liquid recovery tank 16 provided separately from the gas-liquid separation container 12, so that the recovered liquid droplets are separated from each other. Needless to say, winding into the container 12 is prevented, and a decrease in the liquid collection rate in the high flow rate region can be suppressed.

The present invention engaging Ru gas-liquid separator 21 shown in FIGS. 5-7, the collecting liquid portion 2-3,12-3 the desired depth of the gas-liquid separation vessel 2, 12 shown in FIG. 1 to FIG. 4 Except for the box shape and the structure in which the end portions of the inclined bottom surface portions 2-2 and 12-2 are formed in a semicircular shape or an arc shape and project into the box-shaped liquid collecting portion, the above-described FIG. 4 has the same configuration as the gas-liquid separator having the configuration shown in FIG. 4, and the liquid collection part can be improved by making the liquid collection part into a box shape with a desired depth, and the end part of the inclined bottom part is semicircular Alternatively, by forming it into an arc shape and projecting into the box-shaped liquid collecting part, the shielding action of the projecting part prevents the liquid from being rolled up and scattered by the swirling flow in the separation container, and the liquid droplet is captured. This is a gas-liquid separator that can further increase the collection rate.

That is, as shown in FIGS. 5 and 6, the structure is similar to the gas-liquid separators 1 and 11 shown in FIGS. 1 to 4, and the box-shaped gas-liquid separator 22 and the gas-liquid separator Gas-liquid mixed fluid inlet pipe 23 connected horizontally to the side surface, gas outlet pipe 24 connected perpendicularly to the top surface of the gas-liquid separation container, and desired depth connected to the bottom surface of the gas-liquid separation container The inner wall surface of the gas-liquid separation container 22 facing the gas-liquid mixed fluid inlet pipe 23 is defined as a collision wall surface 22-1. In addition, the bottom surface of the gas-liquid separation container connected to the collision wall surface 22-1 is formed as an inclined bottom surface portion 22-2, and the box-shaped liquid collection is formed in a semicircular shape at the end portion of the inclined bottom surface portion 22-2. A semicircular protruding portion 22-2a protruding inside the portion 22-3, the semicircular shape Through the drain pipe 25 to the horizontal bottom of the box form liquid collection unit 22-3 having protrusions 22-2a liquid collection tank 26 is connected. The depth of the box-shaped liquid collecting part 22-3, the protruding amount and the size of the semicircular protruding part 22-2a, etc. are the same as the scale of the gas-liquid separating device 21, the volume of the gas-liquid separating container 22, and the like. It will be determined accordingly. Further, the bottom surface of the box-shaped liquid collecting portion 22-3 may be an inclined bottom surface in order to make it easier for liquid droplets falling from the semicircular protruding portion 22-2a to collect in the drainage pipe 25. 24-1 is a protrusion in the gas-liquid separation container 22 of the gas outlet pipe 24.
Note that the gas-liquid mixed fluid inlet pipe 23 and the gas outlet pipe 24 are provided at one end side of the gas-liquid mixed fluid inlet pipe 23 with respect to the center position on the side surface of the separation container. Is provided at an end opposite to the inlet pipe 23 with respect to the center position of the upper surface of the separation container. Further, the protruding length (protruding allowance) of the protruding portion 24-1 in the gas-liquid separation container 22 of the gas outlet pipe 24 is preferably 5 to 20 mm as described above. In addition, the inclination angle θ of the inclined bottom surface portion 22-2 is preferably set to 10 to 20 degrees as described above.

In the gas-liquid separation device 21 configured as shown in FIGS. 5 and 6, the gas-liquid mixed fluid M flowing into the gas-liquid separation container 22 from the gas-liquid mixed fluid inlet pipe 23 is the inner peripheral wall surface of the gas-liquid separation container 22. The gas G and the liquid droplet W are separated by inertial force or centrifugal force while repeating the collision with the collision wall surface 22-1 while turning along, and the liquid droplet W separated by colliding with the collision wall surface 22-1 is It falls on the inclined bottom surface portion 22-2 and flows downward on the upper surface of the inclined bottom surface portion to fall into the box-shaped liquid collecting portion 22-3 from the semicircular protruding portion 22-2a formed at the terminal portion thereof. At this time, due to the shielding action of the semicircular protruding portion 22-2a, the winding and scattering of the droplets in the box-shaped liquid collecting portion 22-3 due to the swirling flow in the separation container are reduced. The liquid droplets in the box-type liquid collecting section 22-3 are collected in the liquid collection tank 26 through the drain pipe 25.
Thus, in the case of the apparatus of the present embodiment, not only can the liquid collecting property be improved by making the liquid collecting portion into a box shape with a desired depth, but also a semicircular protruding portion formed at the end portion of the inclined bottom surface portion. The action of 22-2a prevents the liquid droplet from being rolled up and scattered by the swirling flow in the separation container, so that the liquid droplet collection rate can be further increased.
In addition, although drawing is abbreviate | omitted here, it cannot be overemphasized that the effect similar to the above is acquired also in a present Example, when the collision wall surface 22-1 of a gas-liquid mixed fluid is made into a rough surface. Nor.

  The protrusion formed at the terminal end of the inclined bottom surface portion 22-2 in the gas-liquid separator 21 having the structure shown in FIGS. 5 and 6 is replaced with the semicircular protrusion 22-2a, for example, FIG. The lower part shown in FIG. 4B may be an arcuate protruding part 22-2b having a horizontal part 22-2c, and the lower part shown in FIG. In the case of the arc-shaped protrusion 22-2b, the droplets in the box-shaped liquid collecting part 22-3 are wound up by the swirling flow in the separation container as in the case of the semicircular protrusion 22-2a. Needless to say, scattering is reduced.

1, 11, 21 Gas-liquid separation device 2, 12, 22 Gas-liquid separation container 2-1, 12-1, 22-1 Collision wall surface 2-2, 12-2, 22-2 Inclined bottom surface 2-3, 12 -3 Liquid collecting part 2-3a, 12-3a Drain port 3, 13, 23 Gas-liquid mixed fluid inlet pipe 4, 14, 24 Gas outlet pipe 4-1, 14-1, 24-1 Protruding part 5, 15 , 25 Drain pipe 6, 16, 26 Liquid recovery tank 12-1 Rough collision wall 22-2a Semi-circular protrusion 22-2b Arc-shaped protrusion 22-2c Horizontal part 22-2d Slope part 22-3 Box Liquid collecting part M Gas-liquid mixed fluid G Gas W Droplet

Claims (5)

  A gas-liquid separation device of a type that separates liquid and gas into liquid and gas by introducing a mixed fluid of liquid and gas into the separation container and causing the gas-liquid mixed fluid to collide with the inner wall surface of the separation container. A gas-liquid mixed fluid inlet tube is opened and connected to the side surface, and an inner wall surface facing the inlet tube is formed as a collision wall surface of the gas-liquid mixed fluid, and an upper portion of the separation container has an opening in the separation container. Is connected to the collision wall surface, and has an inclined bottom surface portion for collecting the separated liquid droplets on the gas-liquid mixed fluid inlet tube side, and the inclined bottom surface portion and the gas-liquid of the separation container A box-shaped liquid collection part is provided between the inner wall surface of the mixed fluid inlet side, and has a semicircular or arc-shaped protrusion that continues to the terminal end of the inclined bottom surface part and protrudes into the box-shaped liquid collection part. A liquid recovery tank is connected to the box-type liquid collector through a drainage pipe Gas-liquid separation device is characterized in that no the configuration. The gas-liquid separator according to claim 1 , wherein a positional relationship between the gas-liquid mixed fluid inlet pipe and the separated gas outlet pipe is offset. The gas-liquid separator according to claim 1 or 2 , wherein a collision wall surface of the gas-liquid mixed fluid is a rough surface. The gas-liquid separation device according to any one of claims 1 to 3 , wherein a protruding length of the gas outlet pipe in the separation container is 5 to 20 mm. The gas-liquid separator according to any one of claims 1 to 4 , wherein an inclination angle θ of the inclined bottom surface portion is set to 10 to 20 degrees.

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