JPS5917358B2 - Method and device for hydrating heat exchanger tube cleaning body - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for impregnating a sponge ball cleaning body used for cleaning condenser cooling pipes.

20-Generally, in a condenser, cleaning work is carried out by administering a sponge ball cleaning body to a stream of cooling water and passing it through the cooling pipes to remove dirt inside the pipes, but the cleaning body contains air. In this case, it is known that the water floats on the cleaning body and is not evenly distributed to the cooling pipes, making it impossible to achieve the intended cleaning effect.

For this reason, a water impregnation operation is performed in advance to expel the air from the cleaning body and add water to it. For example, it has been proposed to repeatedly mechanically deform the cleaning body in water to make it hydrated, or to perform the hydration operation by vacuuming. However, the former method has drawbacks such as severe damage to the cleaning body due to deformation. In addition, in the latter case, even if such air removal work is performed while floating on the free water surface, the pressure of the portion of the cleaning body above the water surface only decreases, and it does not still contain water. Therefore, it is conceivable to immerse the cleaning body in water and perform air removal work by vacuuming, but air is removed from the cleaning body underwater by the interfacial relationship of air bubbles generated on its surface. . That is, the bubbles separate when the buoyant force becomes superior to the adhesion force of the bubbles to the cleaning body. However, countless fine air bubbles remain attached to the surface of the cleaning body, and even if the cleaning body is returned to atmospheric pressure and hydrated in such a state, the air bubbles are drawn into the cleaning body again and complete air removal is not performed. not to mention,
When a large number of cleaning bodies are air-bleeded in a sealed manner, the above-mentioned phenomenon is further exacerbated and it takes a long time. An object of the present invention is to provide a method and apparatus for effectively moistening a cleaning body in a short period of time, which is equipped with a means for completely eliminating air bubbles adhering to the surface of the cleaning body during the moisture-containing work by vacuuming. be.

The characteristics of the present invention are that air bubbles that adhere to the cleaning body during vacuuming are forcibly removed by water agitation,
Circulating cooling water is immediately introduced and kept under the head pressure to absorb water.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a system diagram including a water-containing device that is an embodiment of the present invention. The containment device 4 is installed between the ball circulation systems 7a and 7b that connect the cooling water inlet system 5 and the outlet system 6 connected to the condenser 1, and collects the cleaning water collected by the collector 2 in the outlet system 6. body 1
0 is drawn out by the ball circulation pump 3, and a circulation path is formed in which the cleaning body is introduced into the inlet system 5 again. The water containing device 4 is
The outer cylinder 100 is connected to the inner cylinder 101 to form an upper chamber 100a and a lower chamber 100b.
A perforated plate 102 is provided at the bottom of the inner cylinder 101 and has holes smaller than the diameter of the cleaning body. The circulation system 7 is placed in the lower chamber 100b below the perforated plate 102.
a and system 7b, and the circulatory system 7a, respectively.
, 7b are provided with valves 14 and 15. Further, an upper chamber 100a and a lower chamber 100b of the outer cylinder 100, which are divided by the inner cylinder 101, are connected by a circulating water system 30, and a valve 31 is provided in the circulating water system 30. On the other hand, the inner cylinder 101 has an on-off valve 103 inside.
, with an open shape so that water can overflow from its tip,
An upper chamber 100a is partitioned by the outer cylinder 100 and the inner cylinder 101.
form. A circulating water system 30 is connected to the upper chamber 100a so that a single line of piping is located below the water surface formed by overflowing the inner cylinder 100. Furthermore, an air extraction system 20 equipped with a valve 21 is provided at the top of the outer cylinder 100 and communicates with the space of the water surface soil section. The extraction system 20 is connected to an industrial sector or a vacuum pump 22 or the like. Further, in order to prevent water droplets from entering the bleed system 20, a jam plate 104 is provided in the upper chamber 100a of the outer cylinder 100. The circulating water system 30 is connected to the inner cylinder 1 as described above.
01 into the upper chamber 100a of the outer cylinder 100, a circulation system path is constructed in which the flowing water overflowing into the upper chamber 100a of the outer cylinder 100 is introduced again into the lower chamber 100b below the porous plate 102 by the liquid feed pump 9 provided in the circulation water system 30. Next, the effect of the present invention will be explained with respect to the water-containing work and the cleaning work.

First, during the water-containing work, the cleaning body 10 is kept in the area of the lower chamber 100b of the outer cylinder 100, the valves 14 and 15 are closed, and the vacuum pump 22 and the like are driven to start extracting air from the system 20.

At this time, the initial water level in the water absorber 4 is set at least to the upper end position of the inner cylinder 101, and the liquid feed pump 9 is operated with the valve 31 and the on-off valve 103 open. Therefore, in the water absorber 4, the cleaning body 10 is stirred below the perforated plate 102 by the water flow from the system 30, and the air bubbles that adhere to and generate on the cleaning body 10 are desorbed by mutual interference, and the perforated plate 102 When the flow rises upward and overflows at the upper end of the inner cylinder 101, steam and water are separated. After venting the air from the cleaning body in this way, the on-off valve 103 and the valve 31 are closed, the liquid feed pump 9 is stopped, and the valve 14 is opened to introduce the head pressure of the system 7a to complete the water-containing work. Wait until cleaning starts. During the cleaning operation, the valve 15 is opened and the circulation pump 3 is activated to charge the cleaning body 10 into the system 5. In addition, the valve 10 is closed with the valve 14 closed without introducing the water head pressure from the system 7a.
3 is closed, the liquid feeding pump 9 is operated for a short period of time, and its discharge pressure is introduced to complete the water-containing work. After that, the valve 3 is closed.
1 and the liquid feeding pump 9 may be stopped. In this case, during cleaning work, the valves 14 and 15 will be opened before operation. Further, in the stirring in the vessel according to the present invention, in the lower chamber 100b of the lower blade of the perforated plate 102, as shown in FIGS. It is possible to select any interference of the cleaning body 10 by providing the cleaning body 10 in a direction and causing the water flow to swirl.

Furthermore, although the above description is directed to the cleaning body that floats to the surface during cleaning work, when supplying a new cleaning body that does not contain any water, the water in the water-containing device 4 is drained and the cleaning body is loaded before the above operation is performed. It goes without saying that this should be done.

According to this embodiment, the following effects can be obtained.

(1) Air bubbles that adhere to the cleaning body and are generated due to vacuuming can be completely removed. (2) There is no outflow of the cleaning body to the liquid feed pump, and the cleaning body is only agitated by the water flow within the water-containing device, so there is no damage to the cleaning body.

(3) After evacuation, it can be immediately isolated from the space of the water-containing device, and air will not be taken into the cleaning body from the space again.

(4) Circulating water can be introduced immediately after vacuuming is completed, which allows for quick removal of air bubbles attached to the cleaning body, and enables water-retaining work to be carried out in a short period of time.

As explained above, according to the present invention, the effect that the cleaning body can be completely hydrated in a short time can be achieved.

[Brief Description of the Drawings] Fig. 1 is a system diagram of a water-containing device for a heat exchanger tube cleaning body showing an embodiment of the present invention, and Fig. 2 is an A-A diagram of the water-containing device shown in Fig. 1.
The structural diagram shown in Fig. 3, which shows the cross section, is also similar to A- shown in Fig. 1.
It is a structural diagram of another example showing the A cross section. 1... Condenser, 2... Collector, 4...
... Water containing device, 9 ... Liquid feed pump, 10.
...Cleaning body, 100...Outer cylinder, 100a
...Upper chamber, 100b...Lower chamber, 101
...Inner cylinder, 102 ... Perforated plate, 103
...Opening/closing valve, 104...Japanese plate, 20
...Bleed air system, 30...Circulating water system.

Claims (1)

[Scope of Claims] 1. The inside of the outer cylinder is divided into an upper chamber and a lower chamber by a perforated plate having holes smaller than the cleaning body, and a circulation system for supplying and discharging the cleaning body is connected to the lower chamber, and the upper chamber is connected to a circulation system for supplying and discharging the cleaning body. In a method for hydrating a heat exchanger tube cleaning body, the hydration device has a bleed means that communicates with an upper chamber and bleeds air from the upper chamber, and a liquid feed pump that circulates water in the upper chamber into the lower chamber. Water is supplied into the upper chamber and the lower chamber so that the upper chamber has a free surface, and while the air in the upper chamber and the lower chamber is extracted, the water in the upper chamber is pressurized by the liquid supply circulation pump and the water is supplied to the lower chamber. The heat exchanger tube is characterized in that the water in the lower chamber is jetted to agitate the cleaning body in the lower chamber to remove air bubbles attached to the surface of the cleaning body, and then pressure is applied to water in the lower chamber to make the cleaning body contain water. Method of hydrating the cleaned body. 2. In a water-containing device for a heat transfer tube cleaning body, a partitioning member having an on-off valve is provided inside the outer cylinder to divide it into an upper chamber and a lower chamber, and a hole smaller than the cleaning body is provided between the upper chamber and the lower chamber. A perforated plate is arranged, a circulation system is connected to the lower chamber for supplying and discharging the cleaning body to the lower chamber, and a circulation system path equipped with a liquid feeding pump is arranged to interconnect these divided chambers of the container. A water-containing device for a heat exchanger tube cleaning body, further comprising: a bleed air system disposed above the upper chamber. 3. Claim 2, characterized in that the mounting position of the circulation system path in the lower chamber is arranged toward the center of the lower chamber to generate a stirring flow in the lower chamber. The water-containing device for the heat exchanger tube cleaning body described above. 4. Claim 2, characterized in that the attachment position of the circulation system path to the lower chamber is arranged along the tangential direction of the lower chamber to close the agitation flow within the lower chamber. Hydration equipment for heat exchanger tube cleaning bodies.