JP3944319B2 - Condenser cooling pipe cleaning device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a condenser cooling pipe cleaning device attached to remove foreign substances adhering to the condenser cooling pipe inner surface of a steam power plant, combined power plant, and nuclear power plant.
[0002]
[Prior art]
In general, in the ball cleaning operation by the condenser cooling pipe cleaning device, the process of ball circulation 60 minutes + ball recovery 30 minutes is performed twice a day in summer and once a day in winter. Therefore, since the cleaning device is stopped most of the day, marine organisms contained in the seawater that is the cooling water of the condenser adhere to and grow in the cleaning device pipe, causing the pipe to be blocked.
[0003]
FIG. 2 is an example of a condenser condenser pipe cleaning apparatus using the prior art. Seawater supplied from a cooling water pump (not shown) exchanges heat with the exhaust heat of the turbine in three condensers 7A to 7C, and is collected into two cooling water pipes 8A and 8B and discharged to the ocean.
[0004]
The condenser cooling pipe cleaning device is mainly composed of a ball collector 1, a ball circulation pump 2, a switching valve 3, a ball collector 4, and a ball distributor 5 and a pipe connecting them. In the ball circulation operation, the balls collected in the ball collector 4 together with the seawater pumped from the cooling water pipes 8A and 8B by the ball circulation pump 2 pass through the ball distributor 5 to the cooling water pipe 9 at the condenser inlet. Injected. The injected ball comes into contact with the cooling pipe when passing through the condenser cooling pipe, and removes foreign matters adhering to the inner surface of the cooling pipe.
[0005]
The ball that has exited the condenser 7 passes through the cooling water pipe 8, is collected by the ball collector 1, and is again pumped into the cleaning device together with seawater by the ball circulation pump 2. In the ball collection operation, the delivery of the balls from the ball collection device 4 is stopped, and only the balls collected by the ball collection device 1 are collected.
[0006]
When performing the cleaning operation of the condenser 7A, the switching valve 3A is opened and the switching valves 3B and 3C are closed, whereby the ball collectors 1A and 1B, the ball circulation pumps 2A and 2B, the switching valve 3A, the pipe 6A, and the ball collection are collected. 4A, ball distributor 5A, condenser inlet cooling water pipe 9A, and cooling water pipes 8A and 8B are formed. Therefore, seawater stagnate after pipes 6B and 6C. Similarly, when the washing operation of the condenser 7B is performed, since the switching valve 3B is opened and the switching valves 3C and 3A are closed, seawater is stagnated after the pipes 6C and 6A. When performing the cleaning operation of the condenser 7C, the switching valve 3C is opened and the switching valves 3A and 3B are closed, so that the seawater stagnates after the pipes 6A and 6B.
[0007]
As described above, in the prior art, seawater stagnates in pipes other than the condenser to be cleaned, so that marine organisms adhere to the inner surface of the pipe and cause the pipe to be blocked.
[0008]
[Problems to be solved by the invention]
When the pipe in the condenser cooling pipe cleaning device is blocked, it becomes an obstacle for the passage of the ball, and it becomes impossible to supply a sufficient ball to the condenser. That is, since the cleanliness of the condenser cooling pipe cannot be maintained, the cooling capacity is lowered and the condenser vacuum degree is lowered. A reduction in the condenser vacuum will lead to a reduction in the electrical output of the steam power plant.
[0009]
Thus, the blockage | condensation of a condenser cooling pipe cleaning apparatus leads to the fall of a plant electrical output.
[0010]
[Means for Solving the Problems]
The blockage of the condenser cooling pipe cleaning device is caused by the stagnation of seawater. Therefore, it is possible to prevent the growth of marine organisms by constantly circulating seawater other than during the washing operation. The present invention is characterized by always having a function of circulating seawater throughout the apparatus regardless of the operation state of the condenser cooling pipe cleaning apparatus.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows an embodiment of the present invention. In this embodiment, a ball separator 10 is installed between the ball circulation pump 2 and the switching valve 3. The structure of the ball separator 10 is shown in FIG. Seawater containing the balls 11 flows into the inlet 12. Since the ball separator 10 has a lattice 15 that does not allow the balls 11 to pass through, the balls 11 that have flowed in flow out together with seawater to the ball outlet 13, and only seawater flows out to the seawater outlet 14.
[0012]
As described above, the ball separator 10 has a function of separating the inflowing ball 11 and seawater from each other. The switching valve 3 has three ports and has a function of communicating up to two of them. The ball outlet 13 of the ball separator 10 is connected to the ball inlet side of the switching valves 3A, 3B, 3C. The seawater outlet 14 of the ball separator 10 is connected to the seawater inlet side of the switching valves 3A, 3B, 3C. When performing the cleaning operation of the condenser 7A, the switching valve 3A is in a state where the ball inlet side and the ball recovery device 4A side are in communication.
[0013]
On the other hand, the switching valves 3B and 3C are in communication with the seawater inlet side and the ball collector 4B or 4C, respectively. In this case, one third of the amount of seawater flowing into the seawater inlet 12 of the ball separator 10 flows out from the ball outlet 13 together with the ball, and two thirds out from the seawater outlet 14.
[0014]
In this way, a state where the ball circulates is formed in the pipe line leading to the condenser 7A, and a state where only seawater circulates is formed in the condensers 7B, 7C. The same applies when the condenser 7B or 7C is washed. When any condenser is not being washed, the switching valves 3A, 3B, 3C are all in communication with the seawater inlet side. Accordingly, since there is no place where seawater stays in the condenser condenser pipe cleaning device in any operating state, blockage of the pipe line due to adhesion growth of marine organisms can be prevented.
[0015]
【The invention's effect】
As described above, according to the present invention, when any condenser is performing a cleaning operation or in an operation state where none is performed, the condenser cooling pipe cleaning device generally has seawater. Therefore, it is possible to prevent the blockage of the pipeline due to the adhesion growth of marine organisms.
[Brief description of the drawings]
FIG. 1 is a system diagram showing an embodiment of a condenser condenser pipe cleaning device according to the present invention.
FIG. 2 is a system diagram showing an example of a condenser condenser pipe cleaning device according to the prior art.
FIG. 3 is a structural diagram of a ball separator according to the present invention.
[Explanation of symbols]
1A, 1B ... Ball collector, 2A, 2B ... Ball circulation pump, 3A, 3B, 3C ... Switching valve, 4A, 4B, 4C ... Ball collector, 5A, 5B, 5C ... Ball distributor, 6A, 6B, 6C ... pipe, 7A, 7B, 7C ... condenser, 8A, 8B, 8C ... cooling water pipe, 9A, 9B, 9C ... condenser inlet cooling water pipe, 10 ... ball separator, 11 ... ball, 12 ... seawater inlet , 13 ... ball exit, 14 ... seawater exit, 15 ... lattice.

Claims (1)

A condenser cooling tube cleaning device which is provided with respect to a plurality of condenser provided for each condenser, a flow supplying the ball with seawater condenser inlet cooling water pipe of the condenser In the condenser cooling pipe cleaning device having a path, and switching the flow path for supplying the ball by a switching valve provided upstream of the flow path ,
A ball separator provided upstream of the switching valve, wherein an inlet through which seawater containing the balls flows in, a ball outlet through which the inflowed balls flow out together with the seawater, and a seawater outlet through which the seawater from which the balls are separated flow out Having a ball separator with
The switching valve is provided for each flow path, and each switching valve includes a ball inlet side connected to a ball outlet of the ball separator, a seawater inlet side connected to a seawater outlet of the ball separator, A condenser condenser pipe cleaning device having three ports on the flow channel side and configured so that the flow channel side communicates with the ball outlet side or the seawater inlet side .

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