JP5439026B2 - Gas-liquid separator - Google Patents

Description

  The present invention relates to a gas-liquid separator that separates liquid from gas mixed with liquid.

  For example, in order to separate the cooling oil (liquid) mixed in the discharge gas from the discharge gas of the oil-cooled compressor, the gas is blown into the container and the liquid is subjected to inertial separation or centrifugal separation. A vessel is used.

  In general, since the discharge gas of the oil-cooled compressor contains a lot of oil, the oil is separated to some extent in the introduction pipe of the gas-liquid separator, and the oil flows along the gas at the bottom of the pipe. . Here, when the gas is a compressed fluid and the diameter of the introduction pipe is small, the flow velocity of the gas is faster than when the diameter is large, and the oil that has been separated in the introduction pipe is dispersed and splashed, There is a problem that the oil separation efficiency is lowered.

  In addition, when the diameter of the introduction pipe is relatively large, an event in which the separated oil is dispersed in the introduction pipe is less likely to occur, but since the gas flow rate becomes slow, the liquid mixed in the gas is centrifuged. There is a problem that it becomes difficult to generate a swirling flow and a spiral flow for reducing the separation efficiency of the liquid.

  Therefore, as described in Patent Documents 1 and 2, as described in Patent Documents 1 and 2, a partition that guides an air flow (air flow accompanied by a small amount of oil) is provided as described in Patent Documents 1 and 2. Thus, gas-liquid separators of the type configured to inertially separate or centrifuge liquids are known. With this type of gas-liquid separator, it does not depend much on the diameter of the introduction pipe, and it is easy to generate a swirl flow and a spiral flow, and the above-mentioned problems are unlikely to occur.

  In what is described in Patent Documents 1 and 2, the partition wall is formed integrally with the inner wall of the cylindrical container constituting the gas-liquid separator body. For this reason, in order to increase the flow velocity of the swirl flow and the spiral flow and obtain a sufficient centrifugal separation effect, when the partition wall and the cylindrical container are provided close to each other, because the interval between the container inner wall and the partition wall is narrow, It is difficult to finish the inner wall of the container and the surfaces of the partition walls smoothly by machining. Further, after the predetermined operation time has elapsed, it is necessary to perform maintenance such as internal cleaning on the gas-liquid separator. However, with the above configuration, cleaning between the inner wall of the container and the partition wall is difficult. It is.

JP 2004-52710 A JP 2006-305525 A

  In view of the above problems, the present invention provides a gas-liquid separator capable of providing a partition without requiring strict processing accuracy and capable of exhibiting high gas-liquid separation efficiency. Let it be an issue.

In order to solve the above-mentioned problems, a first aspect of the gas-liquid separator according to the present invention includes a substantially cylindrical container main body and a lid body that has an exhaust port formed in the center and seals the upper end of the container main body. When the introduction channel which opens into the container body, so as to interfere with the path of the gas to be introduced on the extension of the conduit of the introducing flow channel, in said container body Migihitsuji covering the opening of the introduction channel is suspended in the so gap between the inner wall of the container body is gradually wider toward the circumferential end of the circumferential direction end, the lid to protrude cross-section is closed and the arc-shaped partition wall, The circumferential direction of the partition wall in which the gap between the opening of the introduction channel and the inner wall of the container body is narrow so as to increase the flow resistance and substantially restrict the gas flow to one side in the circumferential direction. The length to one end is the other end in the circumferential direction of the partition with a wide gap with the inner wall of the container body. And longer than the length of the.

  According to this configuration, since a gap is provided between the partition wall and the inner wall of the container body, even if there is an error in the relative position between the partition wall and the inner wall, they do not interfere with each other. For this reason, it is possible to project the partition wall on the lid without requiring strict processing accuracy. Accordingly, while the container body is formed of a casting or the like, the air flow can be guided in the circumferential direction with a simple structure to generate a swirl flow or a spiral flow, and the liquid in the gas can be separated by centrifugal force. Further, since the lid body and the partition wall can be integrally removed from the container body, maintenance such as cleaning is easy.

  According to this configuration, since the flow resistance on the side where the gap with the inner wall of the container body is narrow is increased, the gas flow can be substantially restricted to one side in the circumferential direction, and a swirling flow and a spiral flow are generated in the container body. Can effectively separate the liquid.

  In the gas-liquid separator according to the first aspect of the present invention, the introduction flow path may be disposed in the container body in a substantially radial direction.

  According to this configuration, after the gas is applied to the partition wall and the liquid is inertially separated, the liquid can be further centrifuged by forming a swirl flow.

  Further, in the gas-liquid separator according to the first aspect of the present invention, the container body has a spiral extending downwardly extending from the opening of the introduction flow path to the side having a wide gap with the partition wall on the inner wall. A groove may be formed.

  According to this configuration, the spiral groove helps the generation of the spiral flow, and the liquid separated by the spiral groove can be captured and efficiently separated.

Further, a second aspect of the gas-liquid separator according to the present invention includes a substantially cylindrical container body, a lid having an exhaust port formed at the center and sealing the upper end of the container body, and the container body. Close to the inner wall of the container main body so as to have a certain gap between the inner wall of the container main body in order to obstruct the introduction flow path that opens and the path of the gas introduced on the extension line of the pipe line of the introduction flow path , The container body has a partition wall that is suspended in the container body so as to cover the opening of the introduction channel and protrudes from the lid, and the container body has an inner wall on the introduction channel. is the spiral groove that extends in downward movement of the opening or we screw spiral is formed and the partition wall, that the lid to contain the gas introduced into the container body from the inlet passage into said spiral groove The gas swirl flow is generated .

  According to this configuration, a spiral flow can be generated along the spiral groove, and the liquid in the gas can be centrifuged. Further, by providing a gap between the inner wall and the partition wall, high processing accuracy is not required for the container body, the lid body, and the partition wall.

  Moreover, the gas-liquid separator of the 2nd aspect of this invention WHEREIN: The said introduction flow path may be arrange | positioned by the said container main body in the substantially radial direction.

  According to this configuration, after the gas is applied to the partition wall and the liquid is inertially separated, the liquid can be further centrifuged by forming a swirl flow.

  According to the present invention, since the partition wall provided with a gap with the inner wall of the container main body is provided on the lid, the partition wall can be easily arranged. Further, the liquid can be effectively separated by generating a swirling flow and a spiral flow in the container body by the partition walls and the spiral groove.

It is a horizontal sectional view of the oil separator of a 1st embodiment of the present invention. It is a vertical sectional view of the oil separator of FIG. It is a horizontal sectional view of the oil separator of a 2nd embodiment of the present invention. FIG. 4 is a vertical sectional view of the oil separator of FIG. 3. It is a horizontal sectional view of the oil separator of a 3rd embodiment of the present invention. FIG. 6 is a vertical sectional view of the oil separator of FIG. 5.

  Embodiments of the present invention will now be described with reference to the drawings. 1 and 2 show a gas-liquid separator 1 according to a first embodiment of the present invention. The gas-liquid separator 1 is used, for example, as an oil separator that separates cooling oil from discharge gas of an oil-cooled screw compressor (not shown).

  The gas-liquid separator 1 includes an upright bottomed cylindrical container body 2 and a lid 3 that seals the upper end opening of the container body 2. The container body 2 is made of a casting, and has, for example, an inner diameter of about 250 mm and a height of about 800 mm.

  In the container body 2, an introduction flow path 4 is provided in the radial direction for introducing gas. The introduction flow path 4 is formed in a nozzle shape having an inner diameter of about 20 mm at a position about 1/5 from the upper end of the container body 2, and an opening 4 a is formed in the inner wall 2 a of the container body 2.

  A partition wall 5 is welded to the lid body 3 so as to protrude therefrom. The partition wall 5 is suspended in the container body 2 so as to cover the opening 4 a of the introduction flow path 4. Further, the gap between the partition wall 5 and the inner wall 2a of the container body 2 is narrow at about 3 mm at the proximal end 5a at one end in the circumferential direction, and gradually expands toward the open end 5b at the other end in the circumferential direction. It is enlarged to about 20 mm. Further, the partition wall 5 is approximately 1.5 times longer from the opening 4a to the adjacent end 5a than to the open end 5b.

  Further, an exhaust port 6 opening in the center direction of the container body 2 is formed at the center of the lid 3. A liquid discharge port 7 for discharging the separated oil is formed at the bottom of the container body 2. The container body 2 and the lid 3 are fixed by a plurality of bolts 8.

  In the gas-liquid separator 1 of the present embodiment, the partition wall 5 covers the opening 4 a of the introduction flow path 4, that is, in the radial direction from the introduction flow path 4 to the container body 2 on the extension line of the introduction flow path 4. It arrange | positions so that the course of the gas which flows in may be obstructed. Thereby, the partition wall 5 first receives the flow of the gas introduced from the introduction flow path 4, flows through the cooling oil (liquid) accompanying the gas, and the bottom of the introduction flow path 4, and is a container together with the gas. The cooling oil (liquid) flowing into the main body 2 is inertially separated. The liquid that has been inertially separated by the partition walls 5 travels down the partition walls 5 and is collected below the container body 2.

  In the opening 4 a, the gap between the inner wall 2 a and the partition wall 5 forms a flow path that allows gas to flow out in the entire circumferential direction perpendicular to the introduction flow path 4. In other words, the gas once blocked by the partition wall 5 tends to flow in a distributed manner along the flow path formed by the gap between the inner wall 2 a and the partition wall 5.

  Further, the partition wall 5 is provided in the proximity end 5a in the vicinity of the inner wall 2a of the container body 2, and is disposed so that the distance from the opening 4a to the proximity end 5a is long. For this reason, the flow path resistance of the path through which the gas flows into the internal space of the container main body 2 through the gap between the inner wall 2a and the adjacent end 5a is much larger than the flow path resistance on the open end 5b side. Accordingly, the gas flowing in from the opening 4 a mainly flows in the direction of the open end 5 b along the gap between the inner wall 2 a and the partition wall 5 and swivels in one direction inside the container body 2.

  Further, when the gas moves along the gap between the inner wall 2 a and the partition wall 5, the flow velocity increases as the flow path area gradually increases, and a high-speed swirling flow along the inner wall 2 a of the container body 2 is formed. Thereby, the liquid in gas is centrifuged and collect | recovered.

  As described above, the gas-liquid separator 1 is subjected to inertial separation of the liquid from the gas by the above arrangement of the partition walls 5, further centrifuged, and discharged from the exhaust port 6. In order to inertially separate the liquid by the partition wall 5, it is preferable that the direction of the air flow is changed greatly by the partition wall 5. Preferably, the introduction flow path 4 is preferably provided at an angle close to the radial direction of the container body 2 as in the present embodiment so that the airflow is blown to the partition wall at a substantially right angle.

  In other words, the gap between the adjacent end 5a of the partition wall 5 and the inner wall 2a of the container body 2 is provided to absorb a dimensional error of the container body 2 formed of a casting. That is, in the present invention, the gap between the proximal end 5a and the inner wall 2a is a margin for avoiding a situation in which the container body 2 cannot be sealed with the lid 3 due to the contact between the container body 2 and the partition wall 5, In order to reduce leakage that goes back to the swirl flow, it is preferable to design as small as possible.

  With the above-described configuration, the gas-liquid separator 1 receives the gas by the partition wall 5, inertially separates the cooling oil (liquid) accompanying the gas, and is formed along the inner wall 2a of the container body 2. Since the cooling oil (liquid) is centrifuged by a simple swirling flow, high gas-liquid separation efficiency can be exhibited.

  The partition wall 5 is suspended in the container body 2 so as to cover the opening 4 a of the introduction flow path 4 and protrudes from the lid body 3, but there is a gap between the partition wall 5 and the inner wall 2 a of the container body 2. Is provided. Therefore, even if the relative position between the inner wall 2a of the container body 2 and the partition wall 5 is slightly shifted, they do not interfere with each other. The partition wall 5 can be provided.

  Further, since the gas-liquid separator 1 is provided with the partition wall 5 on the lid 3, the partition wall 5 can be detached from the container body 2 by removing the lid 3. Therefore, maintenance such as cleaning of the partition wall 5 and the opening 4a of the introduction channel 4 is easy.

  3 and 4 show a gas-liquid separator 1a according to a second embodiment of the present invention. In the following description, the same components as those of the above-described embodiment are denoted by the same reference numerals, and redundant description is omitted.

  The gas-liquid separator 1a of the present embodiment spirally descends on the inner wall 2a of the container body 2 on the side where the gap between the opening 4a of the introduction flow path 4 and the inner wall 2a is wide, that is, on the open end 5b side of the partition wall 5. Thus, a spiral groove 9 extending is formed.

  Thereby, since the gas introduced into the gap between the inner wall 2a and the partition wall 5 from the introduction channel 4 and blocked by the partition wall 5, the channel area in the direction in which the spiral groove 9 is formed is particularly large. It is easy to form a flow along the spiral groove 9. Further, the spiral groove 9 receives the centrifuged liquid and holds it so as not to be scattered again in the airflow, which contributes to enhancing the gas-liquid separation effect.

  5 and 6 show a gas-liquid separator 1b according to a third embodiment of the present invention. The gas-liquid separator 1b has partition walls 10 that are evenly arranged on both sides in the circumferential direction of the opening 4a so as to form a certain small (for example, 5 mm) gap between the inner wall 2a of the container body 2 and the gas-liquid separator 1b. .

  The partition wall 10 serves as a lid for containing the gas introduced from the introduction flow path 4 in the spiral groove 9. Thereby, although the airflow along the spiral groove 9 is generated, since there is a gap between the inner wall 2a and the partition wall 10, the gas leaks from the spiral groove 9. The gas overflowing outside the spiral groove 9 is also dragged by the airflow flowing through the spiral groove 9 to form a spiral flow along the spiral groove 9.

  That is, since the gas-liquid separator 1b easily forms a spiral flow along the spiral groove 9 and effectively captures the separated liquid, the gas-liquid separator 1b has high gas-liquid separation efficiency. Can demonstrate.

DESCRIPTION OF SYMBOLS 1, 1a, 1b ... Gas-liquid separator 2 ... Container main body 3 ... Cover body 4 ... Introduction flow path 5 ... Partition 5a ... Proximity end 5b ... Open end 6 ... Exhaust flow path 7 ... Oil discharge flow path 8 ... Bolt 9 ... Spiral groove 10 ... Bulkhead

Claims (5)

A substantially cylindrical container body;
An exhaust port is formed at the center , and a lid that seals the upper end of the container body;
An introduction channel opening in the container body;
To interfere with the path of the gas to be introduced on the extension of the conduit of the introducing passage, it is suspended in the container body opening of the introduction channel covering the Migihitsuji, the gap between the inner wall of the container body to be gradually wider toward the circumferential end of the circumferential direction end, the lid projecting into the cross section have a circular arc-shaped partition wall,
The circumferential direction of the partition wall in which the gap between the opening of the introduction channel and the inner wall of the container body is narrow so as to increase the flow resistance and substantially restrict the gas flow to one side in the circumferential direction. The gas-liquid separator characterized in that the length to one end is longer than the length to the other circumferential end of the partition with a wide gap with the inner wall of the container body . The gas-liquid separator according to claim 1, wherein the introduction flow path is disposed in the container main body in a substantially radial direction. The container body, the inner wall, the opening of the introduction channel, claim 1, characterized in that the gap between the partition wall is formed a spiral groove extending descends spirally broad side or 2 The gas-liquid separator described in 1. A substantially cylindrical container body;
An exhaust port is formed at the center , and a lid that seals the upper end of the container body;
An introduction channel opening in the container body;
In order to obstruct the path of the gas to be introduced on the extension line of the conduit of the introduction flow path, the opening of the introduction flow path is made close to the inner wall of the container body so as to have a certain clearance between the inner wall and the inner wall. A cross-section that is suspended in the container main body so as to cover and protrudes from the lid body has an arc-shaped partition wall,
The container body, an inner wall, a spiral groove extending descends to the opening or et threaded spiral of the introduction channel is formed,
The gas-liquid separator, wherein the partition wall serves as a lid for confining the gas introduced into the container main body from the introduction flow path into the spiral groove, thereby generating a swirl flow of the gas . The gas-liquid separator according to claim 4 , wherein the introduction flow path is disposed in the container main body in a substantially radial direction.

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