JPH0566163B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a separator that is attached to gas piping for steam, compressed air, etc., and separates water in the gas (for example, condensed water) and removes it from the system. In particular, it relates to the structure of a steam/water separator that swirls fluid and separates steam and water by the action of centrifugal force.

This type of steam/water separator separates the fluid by swirling the fluid in the upper part of the casing and shaking out the water droplets in the gas to the outside by the action of centrifugal force.The gas is passed through to the outlet side and separated. Water droplets are drained out of the casing by a drain valve located at the bottom of the casing.

Prior Art The structure of a conventional steam/water separator is such that a cylindrical partition member is disposed in the upper part of the casing to form an annular space between the partition member and the casing outside the partition member.
A large number of downwardly inclined swirling vanes are arranged radially in an annular space, the upper part of the annular space is connected to the inlet, the lower part is connected to the drain valve part, and the hole inside the partition member is connected to the outlet side. . Therefore, since the fluid from the inlet is swirled by the swirling vanes in the annular space, water droplets are thrown out by the action of centrifugal force. The separated water droplets flow down and are discharged from the system through a drain valve. The gas in the center of the swirling flow passes through the hole inside the partition member and heads toward the outlet side.

Problems to be Solved by the Invention In the above method, even if the swirling flow is strengthened, some of the water droplets are carried away to the outlet side, making it impossible to increase the separation efficiency of air and water beyond a certain level.

This simply takes advantage of the natural law that when a fluid is swirled, centrifugal force causes objects with greater mass to be swung outward, so tiny water droplets are swirling closer to the center. This is because water droplets adhering to the partition wall member wrap around from the outside to the inside along the surface, and are carried by gas to the outlet side.

In order to solve this problem, a means must be added to catch the water droplets and actively shake them out.

Means for Solving the Problems The technical means of the present invention taken to solve the above-mentioned technical problems is to arrange a swirling vane in an annular space formed by a casing and a partition member, and The upper part is connected to the inlet, the lower part of the annular space is connected to the drain valve, and the hole inside the partition member is connected to the outlet side,
In a steam/water separator that separates steam and water using the centrifugal force caused by swirling and discharges the separated water droplets to the outside of the system using a drain valve placed in the space below, a cylindrical partition wall member has a cylindrical partition wall member with a cylindrical partition wall member with a cylindrical partition wall member. A slanted slanted wall is formed, and a spiral wall is formed that gradually extends outward from the top end of the slanted wall toward the bottom end, and is connected to the end wall in the radial direction in a stepped manner at the bottom end. It is positioned below the lower end of the swirl vane, which is made up of an end wall and a spiral wall.

Effect The operation of the above technical means will be explained.

An annular space is formed around the outer periphery of the cylindrical partition member, and a downwardly inclined inclined wall is located in the annular space, so that the direction of the fluid is changed diagonally downward by the inclined wall when passing through the annular space. . Therefore, due to its continuity, the fluid swirls in the annular space, and the swirl also extends above and below the inclined wall. That is, the fluid enters the annular space while swirling and exits while swirling.

Since the spiral wall gradually protrudes outward from the upper end of the inclined wall toward the lower end, the fluid travels outside in the tangential direction of the annular space and is better blown onto the outer inner wall of the casing. Further, since the width of the annular space becomes narrower as it progresses from the upper end of the inclined wall to the lower end, the speed of the swirling flow gradually increases and reaches its maximum at the lower end.

Since the spiral wall is connected to the radial end wall in a stepped manner at the lower end of the inclined wall, the width of the annular space suddenly increases at the end wall. For this reason, when the fluid swirls, the pressure near the end wall decreases, and water droplets adhering to the nearby wall surface gather at the joining ridgeline between the spiral wall and the end wall, and as described above, this joining ridgeline It was blown away from the ridgeline by a strong swirling flow that reached its maximum speed in the
Sprayed on the inner wall of the outer casing.

The water droplets thus separated flow down along the inner wall of the outer casing and are removed from the system by a drain valve.
The gas from which the water droplets have been separated travels further downward from the lower end of the swirling vane while swirling, and flows out from the lower end of the partition member to the outlet through the inner hole.

If a vertical wall is formed downward from the upper end of the inclined wall, the fluid entering the annular space while swirling will collide with the vertical wall, so some of the water droplets will hit the vertical wall and adhere to it, separating it from the gas. You can also get benefits.

Effect of the invention The present invention produces the following unique effects.

It not only swirls the fluid and separates air and water by the action of centrifugal force, but also actively collects water droplets at the ridgeline where the spiral wall and end wall join, and maximizes the speed of the swirling flow at the ridgeline. Water droplets are blown away from the ridgeline and onto the inner wall of the outer casing, resulting in extremely high air-water separation efficiency.

We did not simply increase the speed of the swirling flow, but by making the width of the annular space narrowest at the lower end of the inclined wall, we optimized the velocity of the swirling flow at the key point, that is, at the lower end of the inclined wall. The swirling flow at the front and back is gentle, and there is no possibility that water droplets will be carried by the gas to the outlet side or that the water surface at the drain valve section will be disturbed and the drain valve will malfunction.

In a structure in which the lower end of the partition wall member and the lower end of the swirl vane are formed at approximately the same height, water droplets collected at the joining ridge line between the spiral wall and the end wall pass from the lower end of the partition member to the outlet through the hole inside the wall. Although water droplets are likely to be re-engulfed by the gas flowing towards them, since the lower end of the partition member is positioned below the lower end of the swirling blade, the water droplets will not be re-engulfed by the gas, further improving the separation efficiency of steam and water.

Embodiment An embodiment illustrating a specific example of the above technical means will be described (see FIGS. 1 to 4).

The embodiment shown in FIG. 1 is a steam separator 2 according to the present invention.
are integrally combined with a pressure reducing valve 1 for steam.

A double substantially cylindrical partition member 4 is arranged around the main valve 3 of the pressure reducing valve 1. The outer cylinder has a straight shape and is formed lower than the inner cylinder. The inner cylinder has a shape that gently widens at the top and bottom.
A tapered screen 5 is arranged outside the partition member 4. A connecting rod 6 is integrally formed on the central axis inside the partition member 4 via a rib, and guides the lower part of the main valve 3. The inlet 7 is connected through the screen 5 to the annular space 8 between the double cylindrical shapes of the partition member 4, and the inside of the partition member 4 is connected to the outlet 9 through the valve port of the main valve 3.

A swirling vane 10 is provided integrally with the partition wall member 4 in the annular space 8.
Form. As shown enlarged in FIGS. 2 to 4, the swirl vane 10 includes a vertical wall 11 formed to protrude in the radial direction from the upper end of the inner cylinder of the partition member 4 to the upper end of the outer cylinder, and an outer wall 11. An inclined wall 12 formed between the inner cylinders by slanting downward from the lower end of the vertical wall 11, and a spiral wall 1 formed spirally from the inner cylinder toward the outer cylinder on the upper surface of the inclined wall 12.
3, and five are formed in the annular space 8. The terminal end of the spiral wall 13 is connected to the radial end wall in a stepped manner.

A lower cover 1 is attached to the lower end of the casing 14 of the steam/water separator.
5 is attached with bolts to form a drain valve chamber 16 inside. A spherical float 17 inside the drain valve chamber 16
to accommodate.

A drain valve seat 18 is attached to the inner end of a drain port 19 on the lower lid 15. A float cover 20 is attached to cover the float 17. float cover 20
A connecting opening 21 is opened at the bottom of the. Reference number 22 is a ventilation hole provided in the upper part of the float cover 20.

The fluid entering from the inlet 7 is swirled by the inclined wall 12 of the swirl vane 10. Water droplets in the fluid are thrown out and separated by centrifugal force. Vertical wall 11
The inflowing fluid is allowed to fall vertically to offset the swirling flow caused by the inclined wall 12, thereby slowing down the flow velocity of the swirling flow and making the swirling flow more downward. At this time, some of the water droplets hit the vertical wall 11 and adhere to the surface.

The spiral wall 13 directs the swirling flow outward from the tangential direction of the annular space 8. Further, the width of the annular space 8 is minimum at the lower end of the inclined wall 12,
Maximum flow velocity. Since the terminal end of the spiral wall 13 is connected to the end wall in the radial direction in a stepped manner, the width of the annular space suddenly increases at the joining ridge line between the spiral wall and the end wall. For this reason, when the fluid swirls, the vicinity of the end wall becomes a low pressure region, and water droplets adhering to the wall surface gather at the joining ridgeline. The water droplets that have collected in this manner are blown away from the joint ridge line by a strong swirling flow and are blown onto the inner wall of the casing.

The water droplets thus separated flow down along the outer partition member 4 and the inner peripheral wall of the casing 14. The gas that has passed through the lower end of the partition member 4 passes through its inside toward the main valve 3 of the pressure reducing valve 1 and flows out to the outlet 9. The separated water enters the interior through the connection opening 21 of the float cover 20. At this time, the gas inside the float cover 20 exits to the outside through the ventilation hole 22. The float 17 ascends and descends according to the water level, opens and closes the drain valve port of the drain valve seat 18, and drains the drain port 1.
Only water is discharged from the system from point 9.

[Brief explanation of the drawing]

Fig. 1 is a partial cross-sectional view of a steam/water separator according to the present invention combined with a pressure reducing valve, Fig. 2 is a cross-sectional view of a swirl vane integrally formed with a partition member, and Fig. 3 is a longitudinal cross-section of Fig. 2. FIG. 4 is an external view of the swirl vane integrally formed with the partition wall member. DESCRIPTION OF SYMBOLS 1... Pressure reducing valve, 2... Steam water separator, 4... Partition member, 8... Annular space, 10... Whirling vane, 11
... Vertical wall, 12 ... Inclined wall, 13 ... Spiral wall, 1
7...Float, 19...Drain port.

Claims (1)

[Claims] 1 A swirling vane is arranged in an annular space formed by a casing and a partition member, the upper part of the swirling vane in the annular space is connected to the inlet, the lower part of the annular space is connected to the drain valve, and the hole inside the partition member is connected to the outlet side, In a steam/water separator that separates steam and water using the centrifugal force caused by swirling and discharges the separated water droplets to the outside of the system using a drain valve placed in the space below, a cylindrical partition wall member has a cylindrical partition wall member with a cylindrical partition wall member with a cylindrical partition wall member. A slanted slanted wall is formed, and a spiral wall is formed that gradually extends outward from the top end of the slanted wall toward the bottom end, and is connected to the end wall in the radial direction in a stepped manner at the bottom end. A steam/water separator located below the lower end of a swirling blade consisting of an end wall and a spiral wall.