JP2955518B2 - Condenser cleaning equipment in power plants - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a condenser washing apparatus for removing contaminants on the inner surface of a condenser by sliding a large number of balls into the condenser.

[0002]

2. Description of the Related Art Generally, as shown in FIG. 5, a condenser 50 of a power plant has a built-in thin tube 51, and an inlet pipe 52 is connected to one side of the condenser 50 and a discharge pipe 53 is connected to the other side. The seawater is sent in through the inflow pipe 52, and the steam flowing outside the thin tube 51 is cooled from the inside of the thin tube 51 by the seawater and condensed, and the seawater having absorbed the heat is sent out to the discharge tube 53.

In this operation, since the inside of the thin tube 51 is always filled with seawater, organisms floating in the seawater may adhere to the inner surface, and the cooling efficiency may decrease. In order to prevent this, the condenser 50 is equipped with a cleaning device 54 that removes deposits on the inner surface of the thin tube 51.

In this cleaning device 54, a delivery pipe 57 of a sponge-shaped ball 56 is connected to a pump 55, and the tip of the delivery pipe 57 is located in the inflow pipe 52, and the discharge pipe 5
3 is provided with a collector consisting of a pair of screens 58, 58 that swing between a position covering the cross section of the tube and a position to open the tube, and when the screen 58 is closed, the tip of the screen 58 is closed. The collecting pipe 59 of the ball 56 is connected to the peripheral wall of the discharge pipe 53 which is in contact with the discharging pipe 53, and the tip of the collecting pipe 59 is connected to the pump 55.

In the cleaning device 54, when the pump 55 is started with the screen 58 closed in the cleaning operation, a large number of balls 56 are fed into the inflow pipe 52 together with the seawater and flow into the condenser 50. The sliding contact with the inner surface of the thin tube 51 removes the attached matter from the inner surface of the thin tube 51.

[0006] Thereafter, the ball 56 is sent out to the discharge pipe 53 and captured by the screen 58, and the seawater is screened by the screen 5.
8 and is released to the open ocean. On the other hand, the screen 58
The balls 56 accumulated on the upper side are returned to the pump 55 via the recovery pipe 59, and are sent again to the inflow pipe 52.

[0007] At the time other than the washing operation, as shown in FIG.
8 is kept open.

[0008]

In the cleaning device 54, a screen (collector) 5 for collecting the balls 56 is provided.
The attachment points 8 and 58 are located in the discharge pipe 53 relatively near the condenser 50, that is, in the middle of the pipe. However, at this position, a bend, T
Mold pipes, valves, etc. may also be installed, and there is considerable pressure downstream of the collector 58 so that the flow of seawater may be slow or even stopped. Also,
In the vicinity of a curved pipe, eddy currents and backflow are likely to occur,
The flow of the seawater becomes unstable, and the ball 56 flowing with the seawater is also difficult to flow smoothly. Therefore,
When the collector 58 is installed at this position, the flow resistance increases, the flow becomes more unstable, and it takes time to collect the ball 56 or the ball 56 is uncertain. As a result, the operation of the pump 55 Since the time is long or the operation is intermittent, the operation state of the entire plant is not preferable.

In the above-described cleaning apparatus, the screen 58
If the organisms in the seawater adhere to the surface, the screen 58 may be incompletely closed. In this case, the ball 56 leaks to the open sea from the gap between the outer periphery of the screen 58 and the peripheral wall of the discharge pipe 53, resulting in environmental pollution. Can cause

In view of the above, a first object of the present invention is to reduce the flow resistance and ensure smooth and reliable collection of balls, and a second object to completely recover the condenser cleaning balls. And

[0011]

To solve the above Symbol challenges SUMMARY OF THE INVENTION This invention provides a number of balls fed with cooling sea water condenser of a power plant, the ball into the capillary condenser In the above-described condenser cleaning apparatus, the adhering substance on the inner surface of the thin tube is removed by sliding contact, and then the ball is collected and sent to the condenser again, wherein the sea surface of the discharge pipe connected to the downstream side of the condenser is used.
The collector of the ball was attached to the end sunk directly below, and the ball collected from the collector was sent to the condenser again (Claim 1).

[0012] In this way, the internal pressure of the discharge pipe becomes
At the end, the pressure becomes very low and stable, about the atmospheric pressure or the sea level. In addition, since the collector is attached at the end and there is no resistance because there is no pipe on the downstream side, there is no resistance. Since the flow of seawater passing through the water is fast, stable, and always flows out to the sea side, the ball is naturally flushed as well, and the ball collection time is fast and reliable.

The ball that reaches the end of the discharge tube is collected.
It will not be caught by the vessel and leaked into the open sea.

[0014] In the above SL onset bright, towards the end of the discharge pipe downward, the collector, in the vertical direction cage became screen, it can be made to collect the balls at its bottom (Claim 2 ).

[0015] In this case, since the discharge pipe end is downward and the screen is in the vertical direction, the screen is parallel to the flow direction of the seawater, and the seawater changes its direction at substantially a right angle while flowing out of the collector. The ball separates from the flow of seawater from the weight difference containing water and travels straight, and is reliably collected at the bottom of the collector.

Furthermore, in each invention described above, the mechanism for removing the deposits capturing collector unit provided (claim 3), by removing the deposit, can suppress an increase in flow resistance.

[0017]

Embodiments of the present invention will be described below with reference to the accompanying drawings. The members corresponding to the members of the conventional cleaning apparatus shown in FIG. 5 are denoted by the same reference numerals, and description thereof is omitted.

As shown in FIG. 1 and FIG. 2, at the lower end of the discharge pipe 53 connected to the downstream side of the condenser 50,
A collector 1 is attached. The collector 1 has a funnel 3 connected to the lower end of the screen 2, and a collecting tank 4 is provided at the bottom of the funnel 3.
And is supported by the gantry 5.
The screen 2 has a large number of vertically extending bars 6 arranged in a cylindrical shape, and the funnel 3 is formed of a punching board having a large number of through holes 7. A collecting pipe 8 is connected to one side of the collecting tank 4, and a tip of the collecting pipe 8 is connected to a pump 55.

In this cleaning device, the ball 56 flowing out of the discharge tube 53 enters the collector 1 together with seawater. Since the distance between the adjacent bars 6, 6 of the screen 2 is smaller than the outer diameter of the ball 56, the ball 56 is sent to the funnel 3 without passing through the screen 2, and most of the seawater turns substantially at right angles to the screen. 2 and is released to the open sea.

On the other hand, since the ball 56 has a sponge shape,
It becomes heavier with water, and due to the difference in weight and deflection from water, it travels straight so as to be separated from seawater that changes its direction at a right angle, is guided to the lower center of the funnel 3, and is accumulated in the accumulation tank 4. The seawater that has entered the funnel 3 is discharged to the open sea through the through hole 7. The ball 56 in the collecting tank 4 is sucked into the pump 55 through the recovery pipe 8 together with a small amount of seawater, and is sent to the inflow pipe 52 again.

As described above, in the collector 1, the balls 56 are completely recovered without flowing into the open sea, and the accumulated balls 56 do not obstruct the flow of seawater.

Incidentally, as shown in FIG.
By providing the collector 1 on the downstream side, the ball 56 not caught by the screen 58 can be completely collected without significantly modifying existing equipment.

At this time, a collecting tank 9 may be provided below the tip of the collecting pipe 8, and a pump 10 for transferring the ball 56 from the collector 1 to the collecting tank 9 may be provided at an intermediate portion of the collecting pipe 8. If a large number of through holes 11 are formed in the recovery tank 9, the seawater sent into the recovery tank 9 together with the balls 56 is discharged through the through holes 11.

In addition, instead of the collector 1, a collector 20 shown in FIG. 3 may be provided. This collector 20 has 4
The frame 22 is formed by combining the columns 21 of the book,
A screen 23 is provided between adjacent columns 21, 21,
The bottom surface of the basket 24 surrounded by the screen 23 is covered with an inclined bottom plate 25 having a V-shaped cross section,
The end of the discharge tube 53 is connected to the upper surface of the cage 24, and the bottom plate 2
The collection pipe 8 is connected to the lower end of the pipe 5.

In the cage 24, the two screens 23 can be moved up and down with respect to the frame 22, and a hanger 26 is provided on the upper part of the screens 23. The screen 23 is a long plate 27 with a long plate
6, which are connected in parallel with an interval smaller than the outer diameter of the vertical bar 27 adjacent to the vertically movable screen 23;
A comb tooth-shaped scraper 28 provided on the frame 22 meshes with the space 27. A groove 29 is formed in the bottom plate 25 along the valley, and a number of slits 30 are provided from both sides toward the groove 29.

In this collector 20, the ball 56 falls through the basket 24 without passing through the screen 23, is received by the bottom plate 25, slides down along the groove 29 to the lower end side of the bottom plate 25, and is collected. It is sucked into the pipe 8. Seawater is discharged to the open sea through the screen 23 and the slit 30.

Further, the hanging metal fitting 26 is gripped and the screen 2 is held.
When 3 is moved up and down, the scraper 28 scrapes off the deposits on the vertical rails 27, so that the space between the vertical rails 27, 27 is maintained, and an increase in resistance during seawater discharge is prevented.

[0028]

In the cleaning apparatus according to the present invention, the ball collecting device is provided at the end of the discharge tube that is submerged just below the sea surface , so that the ball can be collected quickly and reliably. In addition, there is almost no outflow of the ball into the open sea, and the problem of environmental pollution does not occur.

Furthermore, if the direction of the screen and the flow direction are the same, and the balls are separated and collected so as to be peeled off, the balls can be reliably collected without increasing the flow resistance.

In addition, if the collector is provided with a mechanism for removing extraneous matter, it is possible to suppress an increase in flow resistance of seawater due to clogging.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an example of a cleaning apparatus according to the present invention.

FIG. 2 is a perspective view showing an embodiment of the collector of the above.

FIG. 3 is a perspective view showing another embodiment of the collector according to the first embodiment;

FIG. 4 is a schematic view showing another example of the cleaning apparatus according to the present invention.

FIG. 5 is a schematic view showing a state of a conventional cleaning device during cleaning.

FIG. 6 is a schematic view showing a state where the cleaning is not performed;

[Explanation of symbols]

 1,20 Collector 2,23,58 Screen 8,59 Recovery pipe 9 Recovery tank 10,55 Pump 28 Scraper 50 Condenser 53 Discharge tube 56 Ball

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F28G 1/12

Claims (3)

(57) [Claims] 1. A large number of balls are fed together with cooling seawater into a condenser of a power plant, and the balls are slid into contact with the narrow tubes of the condenser to remove deposits on the inner surface of the narrow tubes. In the condenser washing device that is fed into the condenser again, it is submerged just below the sea surface of the discharge pipe connected downstream of the condenser.
A condenser cleaning device in a power plant, wherein a collector of the ball is attached to the end of the condenser, and the ball collected from the collector is sent to the condenser again. 2. The collector according to claim 1, wherein the end of the discharge tube is directed downward, and the collector is formed in a cage shape with a vertical screen, and the ball is collected at the bottom thereof. 2. The condenser cleaning device in the power plant according to 1. 3. The condenser cleaning device for a power plant according to claim 1, further comprising a mechanism for removing deposits on the collector.