JPH06205917A - Steam separator - Google Patents

Abstract

PURPOSE:To sharply improve the separation efficiency of liquid particles without increasing an equipment scale. CONSTITUTION:In a cyclone type steam separator by which liquid is separated from a mixed fluid dispersing liquid in gas, a mixed fluid introducing pipe 2 is provided on the side of a shell 1, directed so that the mixed fluid may form a turning flow, and a discharge pipe 4 for the separated liquid is installed in the lower part of the shell and also a gas discharge pipe 3 is provided on the bottom part of the shell so as to pass though it from its central part to the inside. An inner cylinder 5 is provided outside the projecting part 6 of the gas discharge pipe passing through the bottom part, concentrically and so that its upper end may be positioned higher than the upper end of the projecting part 6. Consequently centrifugal forces are generated at two places, between the shell and the inner cylinder and inside the inner cylinder, to separate liquid particles in two stages. The centrifugal force generated inside the inner cylinder of those generated at two places is remarkably large as compared with the one generated inside the shell.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cyclone-type steam-water separator which is used in a boiler, a geothermal power plant or the like, and which separates a liquid from a mixed fluid (gas-liquid mixed fluid) in which a liquid is mixed in a gas.

[0002]

2. Description of the Related Art One of the conventionally used cyclone type steam-water separators is shown in FIG. Figure 5
(a) and (b) are schematic diagrams showing the configuration. In this cyclone-type water-water separator, a gas-liquid mixed fluid introduction pipe 2 is provided on the side of a cylindrical body 1, and a separated liquid discharge pipe 4 is provided at the bottom thereof, and at the bottom thereof. The gas discharge pipe 3 is provided at the center of the. The gas discharge pipe 3 is provided so as to penetrate the bottom portion thereof, and a protrusion 6 is formed inside the body 1. The mixed fluid introducing pipe 2 is attached to the side portion of the body 1 in a tangential direction or in a spiral direction, and the introduced gas-liquid mixed fluid is introduced into the body 1.
A swirl flow is formed inside.

When the gas-liquid mixed fluid is introduced into the steam-water separator having such a structure, the mixed fluid rises while forming a swirling flow along the wall surface of the body 1. Then, while the mixed fluid rises, the liquid particles in the mixed fluid are separated by the action of the centrifugal force and collide with and adhere to the wall surface of the body 1 to form a liquid film. The liquid that has become this liquid film flows down along the wall surface of the body 1 due to gravity, and collects at the bottom thereof. The liquid collected at the bottom is extracted from the liquid discharge pipe 4. On the other hand, the gas from which the liquid particles have been separated changes direction at the upper part of the barrel 1 and descends, and is discharged from the gas discharge pipe 3.

[0004]

DISCLOSURE OF THE INVENTION In a cyclone-type steam-water separator, the performance (minimum particle size that can be captured), which is the size of fine particles, can be separated. It is the main factor affecting efficiency.
The particle size that can be captured is determined by the magnitude of the centrifugal force generated inside the barrel.

However, in the conventional cyclone-type steam-water separator, when the flow velocity of the mixed fluid introduced from the mixed fluid introduction pipe 2 is increased to increase the centrifugal force in order to separate finer particles, conversely, The separation efficiency of liquid particles drops sharply. This is because when the flow velocity of the mixed fluid in the body 1 (the peripheral velocity on the inner wall surface of the body 1) exceeds a certain limit, liquid particles are trapped and the liquid film formed on the wall surface of the body 1 becomes wavy. This is because the wavy liquid film is scattered again. As described above, in the above technique, even if the centrifugal force is increased, finer liquid particles cannot be separated when the means is a method of increasing the introduction flow velocity of the mixed fluid.

An object of the present invention is to provide a cyclone-type steam-water separator which can dramatically improve the liquid particle separation performance without increasing the size of the device.

[0007]

In order to achieve the above-mentioned object, in the present invention, a mixed fluid introducing pipe is provided on the side of the barrel so that the mixed fluid is oriented so as to form a swirling flow.
Further, a separated liquid discharge pipe is provided in the lower portion of the body, and a gas discharge pipe is provided in the bottom portion so as to penetrate from the center to the inside, and the gas discharge pipe is penetrated through the bottom portion to the outside of the protruding portion. , The inner cylinder is concentric with a space between it and the protrusion,
In addition, the upper end of the gas discharge pipe is provided above the upper end of the protruding portion of the gas discharge pipe. Then, it is preferable to provide an opening in the lower part of the inner cylinder above the liquid level of the body.

[0008]

In the present invention, since the inner cylinder is provided outside the projecting portion of the gas discharge pipe projecting into the body, and the upper end thereof is located above the upper end of the projecting portion, There will be two new spaces separated by the inner cylinder. One is a space formed between the body and the inner cylinder, and the other is a space inside the inner cylinder. In this way, since a part of the inside of the cylinder is partitioned by the inner cylinder, the mixed fluid introduced from the mixed fluid introduction pipe rises while swirling along the inner wall of the cylinder and reaches the upper part of the cylinder. , Descends while turning in the inner cylinder. Then, the gas from which the liquid particles have been separated is discharged from the gas discharge pipe.

As described above, the introduced mixed fluid first forms a swirl flow along the inner wall of the barrel, and then also a swirl flow in the inner cylinder. That is, this steam separator has a structure in which centrifugal force is generated at two positions inside the barrel and inside the inner cylinder, and the liquid particles are separated in two stages. The flow velocity of the mixed fluid swirling in the inner cylinder (peripheral velocity on the wall surface of the inner cylinder) and the flow velocity of the mixed fluid swirling inside the cylinder (peripheral velocity on the wall surface of the cylinder) are the same, but the diameter of the inner cylinder is Of the centrifugal force at the above two locations, the centrifugal force generated in the inner cylinder is significantly larger than the centrifugal force generated inside the case.

Therefore, since the liquid particles that have not been separated inside the barrel, which is the first centrifugal force field, are separated in the inner cylinder, which is the second centrifugal force field, the liquid particles are extremely fine particles. Even separated.

[0011]

1 (a) and 1 (b) are schematic views showing the structure of an embodiment of the present invention. In FIG. 1, the same components as those in FIG. 5 are designated by the same reference numerals and the description thereof will be omitted. In this embodiment, the inner cylinder 5 is provided outside the protruding portion 6 of the gas discharge pipe protruding into the case 1. The inner cylinder 5 is arranged concentrically with the gas discharge pipe projecting portion 6 with a space therebetween, and the upper end thereof is located above the upper end of the gas discharge pipe projecting portion 6. By providing the inner cylinder 5, a part of the body 1 is partitioned, a cylindrical space 10 is formed between the body 1 and the inner cylinder 5, and the space 1 is formed inside the inner cylinder 5.
I can do one.

With the above-mentioned structure, the gas-liquid mixed fluid introduced from the mixed fluid introducing pipe 2 first rises while swirling in the space 10, and then descends while swirling in the space 11. Then, after the liquid particles are separated, they are discharged from the gas discharge pipe 3. Thus, the liquid particles in the mixed fluid are primarily separated in the space 10 and then secondarily separated in the space 11. The liquid particles captured in the space 11 flow down along the wall surface of the inner cylinder 5, and are collected at the bottom of the barrel 1 together with the liquid separated in the space 10. Reference numeral 13 denotes an opening provided in the inner cylinder 5, which is a liquid flow port in the inner cylinder 5.

FIG. 2 is a schematic diagram showing the configuration of another embodiment according to the present invention. 2, the same components as those in FIG. 1 are designated by the same reference numerals and the description thereof will be omitted. In this embodiment, the inner cylinder 5 above the liquid level 12 of the barrel
An opening 14 is provided in the lower part of the. For this reason, the space 11 in the inner cylinder and the space 10 outside the inner cylinder are communicated at the lower part thereof.

When the space 11 and the space 10 are made to communicate with each other,
A part of the mixed fluid introduced from the space 10 to the space 11 forms a circulating flow. This is because there is a pressure difference between the upper part and the lower part in the inner cylinder 5, and the pressure is lower in the lower part than in the upper part. Therefore, a part of the mixed fluid in the space 11 is discharged from the inner cylinder 5 and the gas. This is because it flows downward between the pipe protrusions 6 and then flows into the space 10 again.

When the circulation flow of the mixed fluid is formed as described above, even if the insufficiently separated mixed fluid exists near the inner wall of the inner cylinder 5 in the space 11, this insufficiently separated mixing occurs. The fluid is guided into the space 10 and is separated again. For this reason,
The separation efficiency of liquid particles is further improved. As described above, when the opening 14 is provided above the liquid level 12 of the cylinder, even if the operation is performed to some extent in an overloaded state, the separation efficiency of the liquid particles is little affected.

FIG. 3 is a schematic diagram showing the configuration of still another embodiment according to the present invention. 3, the same components as those in FIG. 1 are designated by the same reference numerals and the description thereof will be omitted.
In this embodiment, the inner cylinder 5 is arranged such that there is a gap between its lower end 15 and the liquid level 12 of the barrel. Therefore, a donut-shaped opening 16 is formed at the lower end of the inner cylinder 5.
Is provided. Also in this embodiment, a circulating flow of the mixed fluid flowing through the opening 16 is formed, and this opening 16 has the same effect as the embodiment of FIG.

FIG. 4 is a schematic diagram showing the structure of still another embodiment of the present invention. 4, the same components as those in FIG. 3 are designated by the same reference numerals, and the description thereof will be omitted. In this embodiment, an inverted cone-shaped expanded portion 7 is provided on the upper portion of the inner cylinder 5. The expanded diameter portion 7 serves as an introduction portion when the mixed fluid enters the space 11 from the upper portion of the body 1, and prevents the swirling flow from being disturbed.

[0018]

The present invention has a structure in which the inner cylinder is provided outside the protruding portion of the gas discharge pipe penetrating into the body, and it is provided between the body and the inner cylinder and at two locations in the inner cylinder. A centrifugal force is generated to separate the liquid particles in two steps.

When the present invention is used, the liquid particles in the gas-liquid mixed fluid are separated in two stages, so that a dramatically high separation efficiency can be obtained. In addition, among the centrifugal force fields at the above-mentioned two locations, a remarkably large centrifugal force acts in the inner cylinder, so that liquid particles not separated in the first stage treatment between the barrel and the inner cylinder are also in the inner cylinder. They are separated inside, and even extremely fine liquid particles can be separated.

Further, if an opening is provided in the lower part of the inner cylinder above the liquid level of the cylinder, even if the mixed fluid which is not sufficiently separated exists in the inner cylinder, this mixed fluid passes through the opening. Then, a circulation flow that flows into the space between the body and the inner cylinder is formed, and the separation process is performed again, so that the separation efficiency is further improved.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing the configuration of an embodiment of the present invention.

FIG. 2 is a schematic diagram showing the configuration of another embodiment according to the present invention.

FIG. 3 is a schematic diagram showing a configuration of still another embodiment according to the present invention.

FIG. 4 is a schematic diagram showing a configuration of still another embodiment according to the present invention.

FIG. 5 is a schematic diagram showing a configuration of a conventional cyclone-type steam-water separator.

[Explanation of symbols]

 1 Body 2 Mixed Fluid Introducing Pipe 3 Gas Discharging Pipe 4 Liquid Discharging Pipe 5 Inner Cylinder 6 Gas Discharging Pipe Projection 7 Expanded Diameter of Gas Discharging Pipe 10 Space between Body and Inner Cylinder 11 Space in Inner Cylinder 12 Liquid Level of the Body 13 Opening for Flowing Liquid 14 Opening for Flowing Mixed Fluid 15 Lower End of Inner Cylinder 16 Opening for Flowing Mixed Fluid

Claims (2)

[Claims] 1. A cyclone-type steam-water separator for separating a liquid from a mixed fluid in which a liquid is mixed in a gas, wherein a mixed fluid introducing pipe is directed to a side portion of a body so that the mixed fluid forms a swirling flow. In addition, a separate liquid discharge pipe is provided in the lower part of the barrel, and a gas discharge pipe is provided in the bottom part so as to penetrate inward from the center part thereof, and the gas which penetrates the bottom part is provided. An inner cylinder is provided outside the protrusion of the discharge pipe in a concentric pattern with a space between the protrusion and the protrusion, and the upper end of the inner cylinder is located above the upper end of the protrusion of the gas discharge pipe. A steam-water separator characterized in that. 2. The steam separator according to claim 1, wherein an opening is provided in the lower portion of the inner cylinder above the liquid level of the cylinder.