JPH0411246B2 - - 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, the present invention relates to the improvement of a steam/water separator that swirls fluid to separate steam and water by the action of centrifugal force, and further traps minute water droplets with a filter.

This type of steam/water separator swirls the fluid in the upper part of the casing, uses centrifugal force to shake out and separate water droplets in the gas, and then uses a filter to increase the separation efficiency of the gas. is allowed to pass through to the outlet side, and the separated water droplets are discharged to the outside of the casing by a drain valve placed at the bottom of the casing.

Prior art A conventional steam/water separator is, for example,
There is one proposed in No. 202951 (see Utility Model Application Publication No. 107719/1983). This is done by placing a cylindrical partition member in the upper part of the casing, forming an annular space between the partition member and the casing outside the casing, placing swirl vanes in the annular space, and using the upper part of the annular space as an inlet. , the lower part is connected to the drain valve part, the hole inside the partition member is filled with a filter, and the filter 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. Furthermore,
The swirling flow passes through the filter in the hole inside the partition member, where minute water droplets are captured and grow collectively, and drop into the drain valve part under their own weight and are discharged out of the system, with only the gas heading toward the outlet side.

Problems to be Solved by the Present Invention In the above method, some of the water droplets are carried away to the outlet side, making it impossible to increase the separation efficiency of steam and water beyond a certain level.

This is because the water droplets captured by the filter are carried back to the outlet by the gas flow at the outlet side of the filter before they aggregate and grow as large as they can fall under their own weight.

Means for Solving the Problems The technical means of the present invention taken to solve the above problems is to dispose swirling blades in an annular space formed by a casing and a partition member, and to generate air by centrifugal force caused by swirling. In the steam/water separator, a filter is provided on the outlet side of the swirling vane to further separate air and water, and the separated water droplets are discharged from the system through a drain valve placed in the space below the swirling vane. A constricted portion of the flow path is provided in the filter, and a communicating tube is provided with one end opened near the constricted portion and the other end opened near the outlet side of the filter.

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 the swirling vanes are located in the annular space, so that the fluid swirls when passing through the annular space. Water droplets with a large mass contained in the fluid are blown outward and separated by the action of centrifugal force. The large-mass water droplets thrown out flow down the inner peripheral wall of the casing or are removed to the outside by a drain valve. Microscopic water droplets and gases flow into the filter section. Minute water droplets are captured in the filter section, collect and grow, and water droplets that are large enough to drip under their own weight flow down to the drain valve section or are removed to the outside. Water droplets that cannot drip due to their own weight are carried to the outlet side of the filter by the gas flow. As is clear from Bernoulli's theorem, a communication pipe with one end opened at the constriction below the swirler blade and the other end near the outlet side of the filter has a low pressure at the constriction where the flow velocity is high, and the flow velocity is low. Pressure increases near the small filter outlet side. Therefore, the water droplets that have been carried to the vicinity of the filter outlet pass through the communication pipe to the constriction section and are swirled again by the swirling flow. In this case, some of the water droplets become mist and flow into the filter again, but some of the water droplets are shaken out and separated by the swirling flow and flow down the inner peripheral wall of the casing, or are removed to the outside by the drain valve. Ru. As the above circulation is repeated, water droplets that are captured by the filter and cannot fall due to their own weight are gradually removed from the system.

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

Since the water droplets captured by the filter are not re-engulfed by gas and transported to the outlet side, the efficiency of separating air and water is extremely high.

Filter clogging can be continuously cleared, and there is no need to remove the filter for cleaning or replacement, reducing maintenance costs.

Example An example showing a specific example of the above technical means will be described. (See Figure 1) Connect the upper body 1, lower body 2, and bottom cover 3 with bolts 20,
At 21, the separator casing 4 is installed airtightly.
form. The upper body 1 has a fluid inlet 5 and an outlet 6 coaxially formed in the upper part thereof.

A double, substantially cylindrical partition wall member 7 is arranged inside the upper body 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 constricted portion 26 is formed by the lower widening portion 25 and the inner circumferential wall of the casing. Incidentally, the outer cylinder can be omitted and the main body 1 can also be used. A tapered screen 8 is arranged outside the partition member 7. The inlet 5 is connected through a screen 8 to the annular space 9 between the double cylindrical shapes of the septum member 7, and the inside of the septum member 7 is connected to the outlet 6.

A cylindrical partition tube 10 extending below the partition wall member 7 is fitted inside the partition wall member 7. Partition tube 1
0 is filled with a filter 11. The filter 11 is made of a thin wavy net made of thin metal wires and glass fibers, stacked so that the waves alternate, and its outer diameter is large enough to fit into the hole of the partition tube 10. A communication pipe 27, which has one end opened immediately below the constriction part 26 and the other end opened at the outlet side inside the filter, is inserted through the partition tube 10 and a part of the filter 11. The number of communication pipes 27 is not limited to two as shown in the figure, but may be one or two or more. The filter 11 is prevented from coming off by screens 22 and 23 attached above and below.

The annular space 9 is connected to the outlet 6 from the lower end of the partition tube 10 through a hole inside thereof. A swirl vane 12 is formed integrally with the partition member 7 in the annular space 9.

A spherical float 14 is housed in a drain valve chamber 13 formed by a lower body 2 and a bottom cover 3. A drain valve seat 15 is attached to the inner end of a drain port 16 on the bottom cover 3. A float cover 17 is attached to cover the float 14. A connecting opening 18 is opened in the lower part of the float cover 17. Reference number 19 is a ventilation hole provided in the upper part of the float cover 17.

Fluid entering the annular space 9 from the inlet 5 is swirled by swirl vanes 12. Water droplets with a large mass in the fluid are swung outward and separated by the action of centrifugal force. The large-mass water droplets swung outward flow into the drain valve chamber 13 along the inner circumferential wall of the lower body 2 and descend. Minute water droplets and gas flow into the inside of the partition tube 10 from the lower end thereof. Since the inside of the partition wall 10 is filled with a filter 11, minute water droplets are captured by the filter 11, and water droplets that have grown large enough to fall under their own weight flow down to the drain valve part.
Water droplets that are too large to fall under their own weight are swirled again through the communication pipe 27 at the outlet side of the filter 11, and some of them become mist and flow into the filter 11 again, but some of them are caused by the swirling flow. It is blown out, separated, flows down the inner peripheral wall of the casing, and is removed from the system, repeating the cycle. Therefore, only gas flows towards the outlet 6. Water flowing down into the drain valve chamber 13 enters the interior through the connection opening 18 of the float cover 17. At this time, the gas inside the float cover 17 is
exit through it. The float 14 rises and falls according to the water level, opens and closes the drain valve port of the drain valve seat 15, and discharges only water from the drain port 16 to the outside of the system.

[Brief explanation of drawings]

FIG. 1 is a sectional view of the steam/water separator of the present invention. 1: Upper body, 2: Lower body, 3: Bottom cover, 5: Inlet, 6: Outlet, 7: Partition member, 9: Annular space, 1
0: partition tube, 11: filter, 12: swirl vane, 13: drain valve chamber, 14: float, 15: drain valve seat, 16: drain port, 26: throttle section, 27: communicating pipe.

Claims (1)

[Claims] 1. A swirling vane is placed in the annular space formed by the casing and the partition member, and air and water are separated by the centrifugal force caused by the swirling. A filter is provided on the outlet side of the swirling vane to further separate the air and water, and the separated water droplets are collected. In a steam separator that discharges water to the outside of the system using a drain valve placed in the lower space, a constriction part of the flow path is provided below the swirl vane, one end is opened near the constriction part, and the other end is an outlet in the filter. A steam/water separator equipped with a communicating pipe that opens near the side.