JPH0218890B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Field of Application> The present invention relates to improvements in overheaters. For more information,
The present invention relates to an improvement in a supercontainer in which fluid flowing into a container passes through the container while swirling in an overwound shape.

This type of overheater is mainly used in power plants, gas manufacturing plants, and other industries that use heat to prevent clogging of cooling water in cooler heat exchangers, etc., and is also used for cleaning purposes such as steel mills. It is widely used for filtration of various fluids, including circulating water.

<Prior art> Regarding this type of overheating device, the applicant has
We proposed the overpass device described in Publication No. 43371.

As shown in FIG. 4, this container consists of a cylindrical container body 1 with a lid 3 attached to the top.
Drain pipes 4 and 5 are connected to the lower part of the container body 1 and the lid 3. Further, an inflow pipe 6 is connected to the upper part of the container body 1 in a tangential direction of the cylindrical body 1. Further, a funnel-shaped basket 2 with an outflow pipe 7 connected to the bottom thereof is installed inside the container body 1.

In this filtration device, fluid containing dirt, etc. flows into the container from an inflow pipe 6, swirls around a funnel-shaped basket 2 in an overwound shape, and the centrifugal force generated thereby causes the dirt to move around the outer periphery of the vortex. As it is driven away and sinks,
The fluid is passed through the basket 2 and discharged to the outside through the outflow pipe 7, thereby passing the fluid. Then, the garbage accumulated in the container is discharged to the outside by opening the drain pipes 4 and 5.

<Problems to be Solved by the Invention> In the above-mentioned strainer, dust such as sand with a large specific gravity sinks in the swirl and accumulates at the bottom of the container.
On the other hand, trash such as polysheets and leaves, which have a small specific gravity, float upward while circulating in the whirlpool.

As a result, trash with a small specific gravity gathers at the top of the basket 2, and is sucked into the net and pulled away. Especially when the fluid contains a lot of dirt with low specific gravity, a lot of dirt gets caught in the net.
There is a problem that the mesh becomes clogged.

<Means for Solving the Problems> Therefore, the present invention is characterized in that a blade 20 is provided above the inflow pipe 14, and the vertical length a of this blade 20 is gradually changed in the radial direction of the container. The above-mentioned problems are solved by providing a superconductor that does this.

<Function> The fluid that enters the container from the inflow pipe 14 flows in a spiral shape, but at the upper end of the container, a downward flow occurs due to the action of the vanes 20. Moreover, since the vertical length a of the blade 20 changes in the radial direction of the container, the fluid rapidly descends toward either the center or the outer circumference of the container.
For example, if the length a in the vertical direction increases as it increases toward the outer periphery of the container, the fluid will rapidly fall toward the center of the container, and conversely, as the length a in the vertical direction increases toward the center of the container, If the length is increased, the fluid will rapidly fall toward the outer circumference of the container.

Therefore, floating objects in the fluid rapidly descend with the flow of the fluid and do not accumulate at the upper end of the container.

<Example> Embodiments of the present invention will be described below based on the figures.

FIG. 1 is a longitudinal cross-sectional view of the overloader of the embodiment,
FIG. 2 is a sectional view taken along the - line in FIG. 1.

The container shown in the figure includes a container body 11 having a cylindrical shape with a bottom and a lid 12 attached to the top of this body 11, and a basket 13 is installed inside the container. It will be done.

An inflow pipe 14 is connected to the upper part of the container body 1 in the direction in which the cylinders are connected, and a drain pipe 15 is connected to the lower part.

The basket 13 consists of a funnel-shaped main body part 16 whose follower diameter decreases downward, and a flange part 17 provided at the upper end of the main body part 16. This main body portion 16 is composed of a mesh having a large number of small holes. The lower end of the body portion 16 is connected to an outflow pipe 18, which is connected to the container body 1.
The bottom of 1 leads to the outside.

This basket 13 is fixed to the container by having the flange portion 17 sandwiched between the container body 11 and the lid 12. The container body 11 and the lid 12 are fixed by bolts and nuts 19, and a gasket is inserted between them 11 and 12, although not shown.

A blade 20 is attached to the flange portion 17 of this basket 13. This feather 2
0 may be provided one or more times, but in this embodiment, as shown in FIG. 2, three blades 20, 2
0 and 20 were arranged at equal intervals. This feather 20 is
As shown in FIG. 3, the container is formed so that the length a in the vertical direction becomes gradually longer as it approaches the outer periphery from the center of the container, and in this embodiment, it has a substantially triangular shape when viewed from the side.

In addition, the length in the vertical direction may be formed so as to gradually become shorter as the container approaches the outer periphery from the center of the container. Moreover, this blade 20 is attached to the flange portion 1 of the basket.
7, but it may also be attached to the upper end of the container (the upper end of the container body or the lower surface of the lid).

The inflow pipe 14, drain pipe 15, and outflow pipe 18 of the filter having the above configuration are provided with on-off valves 21,
22 and 23 are connected and used. Also, the lid 12
An air vent pipe 25 equipped with an air vent valve 24 is connected to the air vent pipe 25 .

Next, to explain how to use this filter, the fluid that has passed through the on-off valve 21 enters the container from the inflow pipe 14 in a tangential direction, swirls around the basket 13, and descends. It is filtered through the net of the basket, passes through the outflow pipe 18, passes through the on-off valve 23, and is sent to the next process. The waste, etc., can be removed by opening the on-off valve 22 during operation.
It is discharged from the drain pipe 12.

During this process, among the debris in the fluid, those with a high specific gravity and a small volume, such as sand, sink in the swirling flow and accumulate at the bottom of the container. Therefore, it is desirable to extend the upper end of the outflow pipe 18 to a position further away from the vicinity of the bottom of the container.

Among the debris in the fluid, those with a low specific gravity and a large volume enter from the inflow pipe 14 and float upward while swirling. However, a blade 20 is provided at the upper end of the container. This feather 20
serves as a flap against the vortex flow, directing the fluid flow downward toward the center as shown by arrow b in FIG. As a result, even garbage with a small specific gravity,
It gets caught up in the downward flow of fluid and sinks downward.

At this time, if the drain pipe 15 is operated with the on-off valve 22 open (continuous blowing), even dirt with a small specific gravity will be discharged from the drain pipe 15. or,
When blowing is performed by opening the on-off valve 22 using a timer, such as once every 24 hours (timer blow), when the on-off valve 22 is closed, the debris that has settled once will be removed by arrow c.
After floating, it sinks again as shown by arrow b due to the action of the blades 20. Therefore, even if the on-off valve 22 of the drain pipe 15 is kept closed, the dirt repeatedly sinks and floats, and does not accumulate in one place, thereby preventing clogging of the screen.

Next, an example of an experiment conducted in a transparent container is shown below. Water is used as the fluid, and sand and sawdust are mixed in as dust.

Example 1 The drain pipe 15 was
is carried out in the open state.

Sand: It was confirmed that the sand that entered the container from the inflow pipe 14 immediately settled in the swirl.

Sawdust...The sawdust that entered the container from the inflow pipe 14 is
It was confirmed that it gradually ascended to the surface while rotating around the outer circumference of the vortex at high speed (along the inner wall of the container), but when it surfaced near the top of the container, it was confirmed to descend downward. For more information, go below and inward (basket 13)
after being rapidly drawn in (along the outer circumference of the
The drain pipe 1 descends slowly while rotating at high speed.
It is discharged from 5. It was confirmed that some of the sawdust floated up again before reaching the bottom of the container, but when it rose to the top of the container, it descended again.

Example 2 The experiment was carried out using the same strainer as in Example 1, but with the drain pipe 15 closed.

Both sand and sawdust move in the same manner as in Example 1, but the descending sawdust floats up from the bottom or middle of the container without being discharged from the drain pipe 15, and then repeats the descent and rise.

Comparative Example 1 A test was carried out using the filter shown in FIG. 1 with the blades 20 removed.

Sand: As in Examples 1 and 2, it immediately sinks in the vortex.

Sawdust...Sawdust gradually floats up while rotating at high speed around the outer circumference of the vortex (along the inner wall of the container). Then, it accumulates while rotating between the top of the container and the top of the basket.

Comparative Example 2 In the filter shown in FIG. 1, the blades 20 are removed, and instead, blades X, which are rectangular in side view, are attached at approximately the same level as the inlet pipe 14.

Sand: As in Examples 1 and 2, it immediately sinks in the vortex.

Sawdust...Sawdust gradually floats up while rotating around the inner and outer circumferences of the vortex at high speed. However, due to the turbulent flow caused by the blades X, the sawdust does not rotate along the inner wall of the container, but is scattered between the inner wall of the container and the outer periphery of the basket.

However, the sawdust that has floated to the top of the container does not fall down, but accumulates while spinning around.

<Effects of the Invention> As described above, according to the present invention, dirt in a fluid having a large volume and a small specific gravity is caused to sink by the action of the blades provided above the inflow pipe. As a result, it is possible to prevent the screen from clogging due to debris floating to the top and accumulating near the top of the basket. Drain water from the drain pipe at appropriate intervals or at all times while the filter is in operation. As a result, it was possible to provide a superconductor that can be operated continuously for a long period of time without disassembling or cleaning the superconductor.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of an embodiment of the present invention, FIG. 2 is a longitudinal sectional view taken along the - line of FIG. 1, and FIG.
FIG. 4 is an enlarged view of the main part of the figure and a vertical cross-sectional view of a conventional overpass unit.

Claims (1)

[Claims] 1 A container having a basket 13 inside to which an outflow pipe 18 is connected, and an inflow pipe 14 connected to the upper part of the container.
and a drain pipe 15 connected to at least the lower part of the container, in which the fluid from the inflow pipe passes through the container while swirling in an overwound shape, and a vane 20 is provided above the inflow pipe 14. A container characterized in that the vertical length a of the blade is varied in the radial direction of the container.