CN113557073A

CN113557073A - Gas-liquid separator

Info

Publication number: CN113557073A
Application number: CN202080012294.3A
Authority: CN
Inventors: 富山靖司; 林隆司; 关根一郎; 稻叶隆成; 板垣刚
Original assignee: Mayekawa Manufacturing Co
Current assignee: Mayekawa Manufacturing Co
Priority date: 2020-02-25
Filing date: 2020-12-21
Publication date: 2021-10-26
Anticipated expiration: 2040-12-21
Also published as: KR102619597B1; KR20210118923A; WO2021171369A1; WO2021171662A1; CN113557073B

Abstract

The invention provides a gas-liquid separator capable of increasing the flow velocity of a gas-liquid mixture flowing into a main body part and properly separating gas and liquid. The gas-liquid separator (1) has: a cylindrical main body (10); an introduction path (20) which is provided in communication with the main body and into which the gas-liquid mixture is introduced; and a flow regulating plate (50) which is attached to the main body and regulates the flow of the gas-liquid mixture, wherein the flow regulating plate has a narrow section (54) which is configured such that the distance from the inner wall of the main body gradually becomes narrower toward the end (50A) where the gas-liquid mixture flows out.

Description

Gas-liquid separator

Technical Field

The present invention relates to a gas-liquid separator that separates gas and liquid from a gas-liquid mixture.

Background

In a gas compressor for compressing a gas such as air, refrigerant gas, or process gas, a lubricant (liquid) such as a refrigerator oil is used for the gas such as air or gas sucked into the compressor for the purpose of cooling or lubrication. Therefore, the lubricating oil is mixed with the gas discharged from the compressor.

Therefore, the gas discharged from the compressor needs to be once introduced into the gas-liquid separator, and the refrigerator oil needs to be separated in the gas-liquid separator.

As such a gas-liquid separator, for example, patent document 1 below discloses a gas-liquid separator in which a gas-liquid mixture is blown into a cylindrical main body portion to centrifugally separate the gas and liquid.

In the gas-liquid separator disclosed in patent document 1, a curved guide plate is attached to a cylindrical pressure vessel, that is, a gas-liquid separator main body (main body) with a predetermined interval from an inner wall thereof, and a guide passage is formed between the inner wall of the main body and the guide plate so as to be rotated in a long-distance receiving tank.

Prior art documents

Patent document

Patent document 1: japanese laid-open patent publication No. 2004-52710

Disclosure of Invention

Problems to be solved by the invention

However, in the gas-liquid separator disclosed in patent document 1, since the predetermined length range of the guide plate from one end toward the other end is formed in a shape in which the interval with the inner wall of the main body is gradually enlarged, the flow velocity of the gas-liquid mixture flowing into the main body is reduced in the guide passage. When the flow rate of the gas-liquid mixture decreases, the gas-liquid mixture does not swirl sufficiently in the main body portion, and there is a possibility that the gas and the liquid cannot be separated properly. Further, since the introduction path is attached to the main body so as to be parallel to and close to the tangent line to the outer wall of the main body, it is difficult to attach the introduction path in terms of manufacturing and it takes a lot of time.

The present invention has been made to solve the above-described problems, and an object thereof is to provide a small and compact gas-liquid separator capable of increasing the flow velocity of a gas-liquid mixture flowing into a main body and appropriately separating gas and liquid.

Means for solving the problems

The gas-liquid separator according to the present invention for achieving the above object is a gas-liquid separator for separating gas and liquid from a gas-liquid mixture. The gas-liquid separator has: a cylindrical main body portion; an introduction path provided in communication with the main body and introducing the gas-liquid mixture; a rectifying plate which is attached to an arc formed in the main body of the main body along the length direction of the chord and rectifies the gas-liquid mixture; and an exhaust passage for the gas from which the liquid has been separated. The rectifying plate has a narrow portion configured such that a distance from an inner wall of the main body portion gradually narrows toward an end portion where the gas-liquid mixture flows out. The convolution portion in the main body portion includes the main body portion and the partition plate extending vertically.

Effects of the invention

According to the gas-liquid separator described above, since the flow regulating plate has the narrow portion configured such that the distance from the inner wall of the main body portion becomes gradually smaller toward the end portion from which the gas-liquid mixture flows out, the flow velocity of the gas-liquid mixture can be increased, the space in the main body can be effectively utilized, and gas-liquid separation can be appropriately performed.

Drawings

Fig. 1 is a schematic perspective view showing a gas-liquid separator according to an embodiment of the present invention.

Fig. 2 is a schematic vertical sectional view showing the gas-liquid separator according to the present embodiment.

Fig. 3 is a view from the direction a-a of fig. 2 showing the gas-liquid separator according to the present embodiment.

Fig. 4 is a diagram for explaining the structure of the flow regulating plate of the gas-liquid separator according to the present embodiment.

Fig. 5 is a diagram showing a gas-liquid separator according to modification 1, and corresponds to fig. 3.

Fig. 6 is a diagram showing a gas-liquid separator according to modification 1, and corresponds to fig. 4.

Fig. 7 is a diagram showing a gas-liquid separator according to modification 2, and corresponds to fig. 2.

Fig. 8 is a diagram showing a gas-liquid separator according to modification 3, and corresponds to fig. 2.

Fig. 9 is a schematic bottom view showing the gas-liquid separator according to modification 3.

Fig. 10 is a diagram showing a gas-liquid separator according to modification 4, and corresponds to fig. 2.

Fig. 11 is a graph showing the relationship between the flow rate of the gas-liquid mixture and the separation efficiency.

Detailed Description

An embodiment of the present invention will be described with reference to fig. 1 to 4. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted. For convenience of explanation, the dimensional scale in the drawings is exaggerated and sometimes differs from the actual scale.

Fig. 1 is a schematic perspective view showing a gas-liquid separator 1 according to an embodiment of the present invention. Fig. 2 is a schematic vertical sectional view showing the gas-liquid separator 1 according to the present embodiment. Fig. 3 is a view from the a-a direction of fig. 2 showing the gas-liquid separator 1 according to the present embodiment. Fig. 4 is a diagram for explaining the structure of the flow regulating plate 50 of the gas-liquid separator 1 according to the present embodiment.

As shown in fig. 1, the gas-liquid separator 1 includes: a cylindrical main body 10; an introduction path 20 for introducing a gas-liquid mixture; an exhaust passage 30 for exhaust gas; an oil discharge passage 40 for discharging the refrigerating machine oil; a rectifying plate 50 for rectifying the gas-liquid mixture; and a partition 60 provided below the introduction passage 20. Here, the gas-liquid separator 1 is used for a gas compressor, preferably for a high-speed multi-cylinder refrigerator, more preferably for a marine high-speed multi-cylinder refrigerator, for returning oil associated with compressed gas to a crankcase.

The main body 10 is configured to be cylindrical so as to extend in the vertical direction. According to this structure, unlike the structure in which a funnel having a conical shape is provided at the lower side and the structure in which a swirling flow is generated by using a gas outflow pipe as an inner cylinder as in japanese patent application laid-open No. 5-296610, since the inner cylinder which becomes resistance due to swirling is not provided, the swirling flow is efficiently formed only in a cylindrical shape, and therefore, the swirling region R (see fig. 2) can be narrowed by providing the partition 60. Therefore, the swirling flow is not dispersed, and the swirling speed can be increased, thereby improving the separation efficiency. Further, since there is no portion of the funnel having a conical shape, the gas-liquid separator 1 can be made compact.

The body portion 10 is made of, for example, a steel pipe, but is not particularly limited. The size of the main body 10 is not particularly limited, but is preferably a size capable of appropriately separating gas and liquid. Specifically, the retention time of the gas-liquid mixture is preferably a volume of 0.6 seconds or more.

As shown in fig. 3, the flow regulating plate 50 is disposed in the chord length direction on an arc formed on the main body of the main body 10 when viewed from above, and has one side connected to the inner wall of the main body 10 and the other side provided with an end portion 50A. The rectifying plate 50 has a narrow portion configured such that the distance from the inner wall of the main body 10 gradually decreases.

As shown in fig. 1 and 2, the introduction passage 20 is provided to communicate with the main body 10. The introduction passage 20 is provided as shown in fig. 3. As shown in fig. 3, the introduction passage 20 is provided at a free angle with respect to the center of the main body 10 within the range of an arc formed with a length corresponding to 1/4 or less (within 90 ° shown in fig. 3) of the main body circumference of the main body 10.

Here, for example, when the introduction passage 20 is attached to the main body 10 in a tangential direction, it is difficult to form a distorted hole in the main body 10 and weld the introduction passage 20. In contrast, according to the gas-liquid separator 1 of the present embodiment, since the introduction passage 20 is provided at a free angle and an offset amount with respect to the center of the main body 10, the introduction passage 20 can be easily welded to the main body 10.

As shown in fig. 1, the exhaust gas flow path 30 is provided above the main body 10. The gas (gas) separated from the refrigerating machine oil (liquid) is discharged through the exhaust passage 30.

As shown in fig. 2, the insertion portion of the exhaust passage 30 is configured to extend partially downward from the upper end portion 10A of the main body 10.

For example, in the case where the exhaust passage 30 has a structure that does not have an insertion portion and extends upward from the upper end portion 10A, when the introduction passage 20 and the exhaust passage 30 are close to each other, gas that is not sufficiently separated from the refrigerating machine oil or the refrigerating machine oil separated from the gas by collision separation is discharged from the gas-liquid mixture that flows out to the upper portion from the end portion 50A of the rectifying plate 50, and a part of the gas-liquid mixture may be sucked into the exhaust passage 30 and discharged to the outside.

In contrast, in the gas-liquid separator 1 according to the present embodiment, since the insertion portion of the exhaust passage 30 is configured to extend partially downward from the upper end portion 10A of the main body 10, the gas-liquid mixture flowing out from the end portion 50A of the flow regulating plate 50 does not directly flow into the exhaust passage 30, and therefore, the gas that is not separated and the refrigerating machine oil separated from the gas that are discharged to the outer peripheral region of the insertion portion in the space above the flow regulating plate 50 can be appropriately suppressed from being discharged to the outside.

As shown in fig. 2, the insertion portion of the exhaust passage 30 preferably stops extending downward to a height near a first extension 51 of a flow regulating plate 50, which will be described later. With this configuration, the disturbance of the generated swirling flow can be suppressed. In addition, the assembly work becomes easy.

The lower part of the main body 10 serves as an oil reservoir, and as shown in fig. 1, an oil discharge flow path 40 is provided below the main body 10. The refrigerator oil separated from the gas is discharged through the oil discharge passage 40. A float valve 90 is disposed above the oil discharge flow path 40. Since the float valve 90 is a well-known structure, a detailed description thereof will be omitted.

The refrigerator oil stored below the main body 10 is discharged through the oil discharge flow path 40 by opening the float valve 90, and after a predetermined time has elapsed, the float valve 90 is closed to store the refrigerator oil below the main body 10.

The flow regulating plate 50 performs collision separation of the gas-liquid mixture introduced from the introduction passage 20, and also regulates flow by changing the flow direction to the circumferential direction, and increases the flow velocity of the gas-liquid mixture introduced from the introduction passage 20.

As shown in fig. 3 and 4, the flow regulating plate 50 is fixed to the inner wall of the inflow portion inside the main body 10. The rectifying plate 50 has: a first extension 51 extending inward substantially horizontally from the inner wall of the main body 10; a second extension 52 continuous with the first extension 51 and extending downward; and a third extension portion 53 continuous with the second extension portion 52 and extending toward the inner wall of the body portion 10. For example, as shown in fig. 3, the rectifying plate 50 is attached to an arc formed in a length equal to or less than 1/4 (within 90 ° shown in fig. 3) of the main body circumference of the main body portion 10 in the longitudinal direction of a chord on the X-Y line. As shown in fig. 4, the rectifying plate 50 is formed in an コ shape or a front view

Character shape. The current plate 50 may be integrally formed of the first extension 51, the second extension 52, and the third extension 53.

The method of fixing the first extension 51 and the third extension 53 to the inner wall of the body 10 is not particularly limited, and for example, the fixing is performed by welding. The rectifying plate 50 may be formed integrally with the inner wall of the main body 10. In this way, since the shape of the narrow portion 54 is not variable relative to the main body portion 10 in the first extending portion 51, the rectifying plate 50 can be prevented from being damaged and affecting the life. As shown in fig. 3, the flow regulating plate 50 extends so as to cover the introduction passage 20, and collides with the gas-liquid mixture introduced from the introduction passage 20.

Fig. 3 shows one flow rectification plate 50 having both functions of the collision separation portion and the flow direction rectification portion. The flow direction rectifying portion may be formed of a rectifying plate 50 whose flow path is narrowed toward the narrow portion 54.

The flow path of the narrow portion 54 is narrowed toward the inner opening, and a swirling flow is generated inside the main body while securing a gas flow velocity suitable for centrifugal separation. Further, the member also serves as a member for oblique collision so as not to oppose the swirling flow in the body.

As shown in fig. 3 and 4, the first extending portion 51 is formed linearly when viewed from above and when viewed from the front. As shown in fig. 4, the second extending portion 52 is formed linearly in a front view.

As described above, since the first extending portion 51 and the third extending portion 53 are fixed to the inner wall of the main body portion 10 at the upper and lower sides of the introduction passage 20, the first extending portion 51 and the third extending portion 53 function as a baffle, and the refrigerating machine oil in the gas-liquid mixture introduced from the introduction passage 20 can be appropriately prevented from being discharged from the exhaust passage 30.

As shown in fig. 3, the first extending portion 51 and the third extending portion 53 of the rectifying plate 50 have a narrow portion 54 configured such that the distance from the inner wall of the main body portion 10 gradually narrows toward the end portion 50A where the gas-liquid mixture flows out when viewed from above. That is, in the vicinity of the narrow-width portion 54, the end portions 50A toward the first extension portion 51 and the third extension portion 53 gradually approach the inner wall of the main body portion 10. As shown in fig. 3, the rectifying plate 50 is formed linearly when viewed from above. According to this configuration, the flow velocity of the gas-liquid mixture can be increased, and gas-liquid separation can be performed more appropriately. Further, according to this structure, it is not necessary to form the guide plates and the guide paths about half a circumference in the circumferential direction as disclosed in japanese patent application laid-open No. JP2004-52710, and the structure can be simplified.

Here, for example, when the flow velocity of the gas-liquid mixture in the introduction passage 20 is 4m/s to 10m/s, the flow velocity of the gas-liquid mixture at the end 50A of the rectifying plate 50 is 6m/s to 15 m/s.

As shown in fig. 1, the partition 60 is provided below the introduction passage 20. The partition 60 is connected to the inner wall of the body 10. The partition 60 has a small inner diameter having a so-called circular ring shape. The inner diameter of the partition 60 is not particularly limited, and is 0.4 to 0.6 times the inner diameter of the body 10.

The partition 60 is formed separately from the main body 10, and the partition 60 is fixed to the main body 10 by, for example, welding.

The spacer 60 is formed along the XY plane. That is, the partition 60 is configured to be substantially horizontal without being inclined with respect to the gas-liquid separator 1. In this way, since the partition 60 is provided in the horizontal direction, it can be easily manufactured.

By providing the partition 60 in this way, the turning region R (see fig. 2) in the vertical direction becomes narrower than a structure in which no partition is provided, and the turning speed can be increased. Therefore, gas and liquid can be appropriately separated.

As shown in fig. 1, the separator 60 is disposed sufficiently apart from the exhaust gas flow passage 30. Therefore, the oil attached to the inner wall of the main body 10 is temporarily accumulated on the partition 60 by gravity due to the swirling flow of the gas-liquid mixture, and the oil does not flow out of the exhaust flow path 30 but falls down from the opening portion of the partition 60 to the oil discharge flow path 40 located below.

In the gas-liquid separator 1 configured as described above, when the gas-liquid mixture is introduced from the introduction passage 20, the introduced gas-liquid mixture flows between the inner wall of the main body 10 and the flow regulating plate 50, and flows out from the end 50A of the flow regulating plate 50. Here, since the flow regulating plate 50 has the narrow portion 54, the gas-liquid mixture flows out from the end portion 50A of the flow regulating plate 50 in a state where the flow rate is increased. The gas-liquid mixture flowing out of the end 50A of the rectifying plate 50 swirls on the inner wall of the main body 10, and the gas-liquid mixture is centrifugally separated (see fig. 3). Further, in the region where the swirling flow starts from the end 50A of the flow straightening plate 50, there are no obstacles that prevent the formation of the swirling flow, such as an inner cylinder, and no surfaces or protrusions that collide with a right angle, such as scattering oil droplets.

When oil droplets in the refrigerator oil are small, centrifugal separation is difficult. Therefore, when the gas-liquid mixture swirls around the inner wall of the main body 10, the oil droplets are collected and become large oil droplets, and the large oil droplets are allowed to gravitationally settle along the inner wall of the main body 10.

As described above, the gas-liquid separator 1 according to the present embodiment is a gas-liquid separator 1 that separates gas and liquid from a gas-liquid mixture. The gas-liquid separator 1 has: a cylindrical main body 10; an introduction passage 20 provided in communication with the main body 10 and through which the gas-liquid mixture is introduced; a flow regulating plate 50 attached to the main body 10 and regulating the flow of the gas-liquid mixture to increase the flow rate; and an exhaust passage 30 for the gas from which the liquid has been separated. The rectifying plate 50 is attached to an arc formed in a length equal to or less than 1/4 (within 90 ° shown in fig. 3) of the main body circumference of the main body 10 along the chord length direction. The introduction passages 20 are connected at a free angle and offset within the range of the arc. The rectifying plate 50 has a narrow portion 54 configured such that the distance from the inner wall of the main body 10 gradually narrows toward the end 50A where the gas-liquid mixture flows out. According to the gas-liquid separator 1 configured as described above, since the flow regulating plate 50 has the narrow portion 54 configured such that the distance from the inner wall of the main body portion 10 gradually becomes narrower toward the end portion 50A where the gas-liquid mixture flows out, the flow velocity of the gas-liquid mixture can be increased, and gas-liquid separation can be appropriately performed.

The rectifying plate 50 is formed linearly when viewed from above. According to the gas-liquid separator 1 configured in this manner, the flow regulating plate 50 can be easily manufactured.

The flow regulating plate 50 is fixed to the inner wall of the main body 10 above the introduction passage 20 in a front view. According to the gas-liquid separator 1 configured in this manner, the discharge of the refrigerating machine oil separated from the gas in the gas-liquid mixture flowing out of the end portion 50A of the rectifying plate 50 from the exhaust flow passage 30 can be appropriately suppressed.

The gas-liquid separator 1 further includes a partition plate 60, and the partition plate 60 is provided below the introduction passage 20 and has an annular inner diameter smaller than the inner diameter of the main body 10. According to the gas-liquid separator 1 configured as described above, since the swirl region R along the vertical direction can be sufficiently utilized without using an auxiliary swirl mechanism such as an inner cylinder in the main body 10, the swirl region R becomes narrow, the swirl velocity can be increased, and gas-liquid separation can be more appropriately performed.

Further, the partition 60 is disposed in the horizontal direction. According to the gas-liquid separator 1 configured in this way, the partition 60 can be easily formed. The gas fluid from which the oil is separated rises at the center of the swirling flow through the partition 60 and flows toward the exhaust flow path 30. The conventional body taper portion provided at the lower portion of the body is not required, which contributes to compactness.

The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims.

For example, in the above embodiment, as shown in fig. 3 and 4, the rectifying plate 50 includes: a first extension 51 extending inward substantially horizontally from the inner wall of the main body 10; a second extension 52 continuous with the first extension 51 and extending downward; and a third extending portion 53 extending continuously from the second extending portion 52 toward the inner wall of the body portion 10, and formed in an コ shape. However, as shown in fig. 6, the rectifying plate 150 may be formed in an L-shape having a first extending portion 151 extending inward from the inner wall of the body portion substantially horizontally, and a second extending portion 152 continuous with the first extending portion 151 and extending downward.

In the above embodiment, the partition 60 is provided in the horizontal direction. However, as shown in fig. 7, the partition plate 160 may be inclined downward toward the radially inner side. With this configuration, the refrigerating machine oil on the partition 160 can be dropped down along the inclined surface, and accumulation of the refrigerating machine oil on the partition 160 can be appropriately suppressed.

In the above embodiment, the rectifying plate 50 is formed linearly when viewed from above, but the structure of the rectifying plate is not limited as long as it has a narrow portion in which the distance from the inner wall of the main body portion gradually narrows toward the end portion where the gas-liquid mixture flows out, and for example, it may be formed in a curved shape.

In the above embodiment, the gas-liquid separator 1 has the annular partition 60, but may not have the annular partition.

In the above embodiment, the gas-liquid separator 1 has the annular partition 60, but as shown in fig. 8 and 9, the gas-liquid separator 2 may have a partition 260 that vertically partitions the body 10 instead of the annular partition 60. As shown in fig. 8 and 9, the separator 260 has a through hole 261 formed at an end thereof so as to penetrate vertically. The size of the through hole 261 is not particularly limited, but is, for example, 15mm × 15mm when the inner diameter of the body 10 is 150 to 160 mm.

By providing the partition plate 260 having the through hole 261 at the end portion as described above, the gas-liquid mixture is reduced from entering and exiting below the partition plate 260, and the float valve 90 can be reduced from rattling and fluctuation in the oil level.

As shown in fig. 10, the gas-liquid separator 3 may be provided with a demister 360 in the partition 60. The method of attaching the demister 360 to the partition 60 is not particularly limited. The demister 360 is not particularly limited, and SUS304, linear 0.12mm, and 360kg/m density can be used³. In fig. 10, the demister 360 is attached below the partition plate 60, but the demister 360 may be attached above the partition plate 60, or may be attached so as to be sandwiched by the partition plate 60.

By attaching the demister 360 to the partition plate 60 in this manner, the swirling flow of the gas-liquid mixture can be appropriately attenuated in the demister 360, and thus turbulence of the float valve 90 and fluctuation of the oil level can be reduced.

Next, the performance characteristics of the gas-liquid separator 1 will be described. First, in the case where the volume concentration of oil in the gas-liquid mixture flowing into the main body portion 10 is several percent with respect to the gas-liquid mixture to be separated, the amount of oil contained is large and the swirl force is attenuated, so that the partition plate 60 shown in fig. 1 and 2 is preferably used. On the other hand, when the volume concentration of the oil in the gas-liquid mixture flowing into the main body portion 10 is several ppm, the amount of the contained oil is small and the swirl force is not attenuated, so it is preferable to strengthen the swirl flow generated in the main body portion 10 and reduce the opening of the partition plate, thereby suppressing the turbulence of the float valve 90 and the fluctuation of the oil surface. When it is difficult to determine the size of the opening of the partition plate with respect to the volume concentration of the oil flowing in, it is preferable to reduce the turbulence of the float valve 90 and the fluctuation of the oil surface by providing the demister 360 in the partition plate 60 having a large opening to apply resistance. Further, the above-described effects can be obtained by configuring the partition plate 260.

(examples)

In the gas-liquid separator 1 configured as described above, the results of measuring the separation efficiency and the pressure loss at the time of changing the flow velocity of the gas-liquid mixture introduced from the introduction passage 20 within the range of 5 to 20m/s are shown in fig. 11.

In fig. 11, the horizontal axis represents the flow velocity of the gas-liquid mixture, the black circle on the vertical axis represents the separation efficiency, and the white circle represents the pressure loss. As shown in FIG. 11, when the flow velocity of the gas-liquid mixture was changed to 5m/s, 10m/s, 15m/s, and 20m/s, the separation efficiency could be secured to 97% or more. Further, it is understood that the pressure loss increases together with the flow rate of the gas-liquid mixture, but it is not particularly high because it is 5kPa at the maximum.

It is found that the characteristics of the gas-liquid separator 1 can maintain high separation efficiency even if the blowing speed of the swirling flow is changed in the range of 5m/sec to 20 m/sec. Further, since the pressure loss can be dealt with in accordance with the allowable pressure loss of the facility in which the gas-liquid separator 1 is installed, the degree of freedom in selection increases.

As described above, in the method for separating refrigerating machine oil from gas in the gas-liquid separator 1 according to the present embodiment, first, the gas flowing into the body 10 from the introduction passage 20 is collided and separated by the flow regulating plate 50, and then, the gas-liquid mixture flowing out of the end 50A of the flow regulating plate 50 swirls on the inner wall of the body 10, so that the gas and liquid are centrifugally separated. Since there is no obstacle in the region where swirling starts to form the swirling flow, centrifugal separation and gravity settling in the main body can be effectively used, and therefore the space in the main body can be effectively used, and oil separation can be efficiently performed. Further, since the

partition plates

60 and 260 are provided above the oil level to prevent the oil from being reconciled by the surging and swirling flows of the oil level of the refrigerating machine oil temporarily stored in the lower portion of the main body 10, the separated oil can be stably recovered.

Further, since the funnel portion at the lower portion can be eliminated, the refrigerator can be further reduced in size and size, and therefore, the refrigerator is suitably used as an oil separator of a gas compressor, a high-speed multi-cylinder refrigerator, and more suitably used for a marine high-speed multi-cylinder refrigerator in which an installation space is limited.

Description of the symbols

1 gas-liquid separator

10 main body part

10A upper end

20 introduction path

30 exhaust gas flow path

40 oil discharge flow path

50. 150 rectification plate

50A end

51 first extension part

52 second extension

53 third extension

54 narrow part

60. 160, 260 baffle

90 float valve

360 demister.

Claims

1. A gas-liquid separator for separating gas and liquid from a gas-liquid mixture,

the gas-liquid separator has:

a cylindrical main body portion;

an introduction path provided in communication with the main body and introducing the gas-liquid mixture;

a rectifying plate that is attached to an arc formed in the main body of the main body along the length direction of the chord and rectifies the gas-liquid mixture; and

an exhaust passage for the gas from which the liquid has been separated,

the rectifying plate has a narrow width portion configured such that a distance from an inner wall of the main body portion gradually narrows toward an end portion where the gas-liquid mixture flows out,

the convolution portion in the main body portion includes the main body portion and the partition plate extending vertically.

2. The gas-liquid separator according to claim 1,

the extension length of the insertion portion of the exhaust passage into the main body reaches the height of the upper end position of the horizontal extension portion of the rectifying plate.

3. The gas-liquid separator according to claim 1 or 2,

the flow regulating plate is disposed in a chord length direction on the arc formed on the main body of the main body when viewed from above, and one side of the flow regulating plate is connected to the inner wall of the main body and the other side is the narrow portion.

4. The gas-liquid separator according to any one of claims 1 to 3,

the flow straightening plate is attached along a chord length direction of the arc below 1/4 of the circumference of the main body portion.

5. The gas-liquid separator according to claim 4,

the introduction path is connected at a free angle and offset within the range of the arc.

6. The gas-liquid separator according to any one of claims 1 to 5,

the narrow portion of the flow straightening plate at the fluid blowing tip is selected so that the blowing speed of the swirling flow is in the range of 5m/sec to 20 m/sec.

7. The gas-liquid separator according to any one of claims 1 to 6,

the rectifying plate is コ -shaped when viewed from the front, and is fixed to the inner wall of the main body at least above the introduction passage.

8. The gas-liquid separator according to any one of claims 1 to 7,

the partition plate is provided below the introduction path and has an inner diameter smaller than an inner diameter of the main body.

9. The gas-liquid separator according to any one of claims 1 to 8,

the partition plates are arranged along the horizontal direction.

10. The gas-liquid separator according to any one of claims 1 to 9,

the gas-liquid separator also has a demister installed to the partition plate.

11. The gas-liquid separator according to any one of claims 1 to 10,

the gas-liquid separator further includes the partition plate which is provided below the introduction path and vertically partitions the main body,

the end of the partition plate is provided with a through hole which penetrates up and down.