JP3604854B2 - Condenser ball cleaning device and operating method thereof - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a condenser of a power plant, and more particularly, to a condenser washing apparatus using a smaller number of ball collectors than a condenser body and a method of operating the same.
[0002]
[Prior art]
The condenser cleaning device continuously circulates sponge balls in the cooling pipe during the operation of the condenser to remove slime and foreign matter that has adhered or stagnated on the pipe inner surface. This is for preventing the performance from being lowered, and is described in detail in the paper “Heat exchanger of turbine plant (thermal nuclear power generation; Vol. 42, No. 4; P143-145)”.
[0003]
FIG. 3 shows an external view of a condenser provided with a ball cleaning device. The sponge balls 8 introduced from the ball injection pipe 13 into the cooling water inlet pipes 5 of the condensers 1 for each body wash the inner surface of the cooling pipes 41, and then are supplied to the cooling water outlet pipes 6 of the condenser 1. The ball is collected by the installed ball collector 9. The collected balls 8 are again supplied to the cooling water inlet by the ball circulation pump 11 via the ball take-out tube 10, the ball collection device 12, and the ball injection tube 13. The ball input at the start of cleaning and the ball recovery at the end of cleaning are performed by the ball recovery unit 12.
[0004]
Japanese Patent Application Laid-Open No. 60-206907 discloses that a part of a ball washing device such as a ball circulation pump and a ball collecting device is shared by two systems (two units) of condensers, and the cost of the washing device is reduced. A reduction plan is disclosed.
[0005]
[Problems to be solved by the invention]
In a conventional condenser, a ball collector is provided for each water chamber of each body to perform a cleaning operation. Since the ball collector 9 of the condenser cleaning device is installed in the cooling water outlet pipe of the condenser 1, it has a size approximately equal to the pipe diameter. For example, when a three-body condenser is used in a 1.3 million kW-class nuclear power plant, a ball collector having a diameter of 2600 mm and six units is provided, so that a large arrangement space is required. In addition, since the ball collector is provided with equipment that requires maintenance, such as an open / close grid, it takes a long time for maintenance work.
[0006]
Further, the washing operation of the condenser needs to be controlled for each cylinder for the purpose of restoring the heat conductivity of the cooling pipe and removing foreign substances, and the operation of each cylinder cannot be maintained due to the decrease in the number of ball collectors. Then there is a problem.
[0007]
SUMMARY OF THE INVENTION It is an object of the present invention to provide a condenser cleaning apparatus capable of reducing the number of ball collectors relative to the number of cylinders and enabling a ball cleaning operation for each of the condensers, thereby greatly reducing an arrangement space and cost. It is to provide the driving method.
[0008]
[Means for Solving the Problems]
The above object is to provide a condenser having a plurality of barrels, a counterflow water chamber in each barrel, and a cooling water inlet pipe and a cooling water outlet pipe in each of the water chambers. In a circulating water system of a condenser having two cooling water outlet mother pipes that merges the cooling water outlet pipes, a ball collector is disposed in the cooling water outlet mother pipes, and the number of ball collectors is smaller than the number of the body cylinders. This is achieved by providing a flow path switching means for distributing the cleaning balls collected by the ball collector to the body unit.
[0009]
Alternatively, in the operation method of the condenser ball cleaning device in the circulating water system, during the cleaning operation, a ball collector provided in each of the cooling water outlet mother pipes is set to a collecting state, and the collected cleaning balls 2 This is achieved by controlling the flow path switching means provided at the merging position of the system and distributing the cleaning balls in units of the body so that the washing balls are distributed only to an arbitrary body.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a system diagram of a condenser cleaning device according to one embodiment. The condenser 1 includes three cylinders A, B, and C, and each of the cylinders has two water chambers 4 in which the cooling water flows in the opposite direction. The cooling water is branched from the cooling water inlet mother pipes 3 (only 3a is shown) of the two systems a and b corresponding to the flow directions to the cooling water inlet pipes 5 of each system (total of six rows). It is supplied to the chamber 4 (4-1, 4-2). The cooling water that has passed through the condenser 1 flows out of the six cooling water outlet pipes 6, and is discharged again from the cooling water outlet mother pipes 7 (7a, 7b) assembled in two lines to the ocean outside the system.
[0011]
In the ball cleaning device of the present embodiment, the ball collectors 9 (9a, 9b) are provided in the cooling water outlet mother pipes 7a, b of two systems. The sponge balls collected by the ball collectors 9a and 9b are extracted by the ball circulation pumps 11 (11a and 11b) into the ball extraction pipe 10, and then the balls of both systems are collected. Is sent out to one of the ball collecting devices 12 (12A to 12C) of each of the cylinders A to C.
[0012]
The flow path switching device 15 includes a three-way switching valve, and is switched by the control device 20 so as to completely close or open only one of the flow paths toward each body. The ball collecting device 12 has a configuration in which the ball is not collected in the ball injection pipe 13 during the cleaning operation, and the ball is collected and collected in the collecting operation. The ball injection pipe 13 branches into two injection pipes 13-1 and 13-2 on the way, and the cooling water inlet pipe 6-1 of the water chamber 4-1 and the cooling water inlet pipe 6 of the water chamber 4-2, respectively. -2. Although no special device is provided at the branch portion, the balls are divided into approximately equal numbers by the flow of the cooling water. The B and C cylinders of the condenser 1 have the same configuration.
[0013]
As described above, in the present embodiment, since the ball collector is provided for each cooling water outlet mother pipe of the condenser, not only when provided for each cooling water outlet pipe, but also when provided for each body of the condenser. In comparison, the number of ball collectors can be reduced.
[0014]
Next, an operation method of the condenser cleaning device according to the present embodiment will be described. The condenser washing device repeats washing, collecting and stopping operations. The frequency varies depending on the attachment condition of the cooling pipe and the cooling material, but is about once a day to once or twice a week.
[0015]
FIG. 2 shows a transition diagram of the device state in the ball washing operation of the condenser. The figure shows an example of the operation of the A-body of the condenser 1, which is controlled by the control device 20 at the timing of the start of cleaning, the start of recovery, and the stop of cleaning.
[0016]
FIG. 3A shows the state of the equipment during the ball washing operation, in which the ball collectors a and b of the outlet mother tube series a and b both close the lattice and are in the ball collecting state. The ball circulation pumps a and b are both started and in an operating state. The flow path switching device 15 is opened only for the system A and is in a water-permeable state, and the systems B and C are closed. The ball collection device 12 is operated only in the A-system and throws the ball in at the time of activation, but maintains the non-collection state of the ball. The B and C systems are not operated and maintain the non-recovery state of the ball.
[0017]
FIG. 3B shows the state of the device in the ball collecting operation, in which only the system A of the ball collecting device 12 shifts to the ball collecting state, stops re-introducing the ball flowing into the device, and stocks the ball. .
[0018]
FIG. 3C shows the state of the apparatus when the ball washing is stopped. The ball collectors a and b are in the open state, the ball circulation pumps a and b are in the stopped state, the flow path switching device 15 is in the closed state in all the systems, and the ball is collected. The vessel 13 is in a non-recovery state in the entire system. This state is the normal operation of the condenser 1. When performing the cleaning operation of the B and C cylinders, the B system or the C system of the flow path switching device 15 and the ball collector 13 may be replaced with the state of the A system in FIG.
[0019]
In the configuration in which the ball collector is provided for each cooling water outlet mother pipe of the condenser circulating water system as in the present embodiment, the ball washing operation is performed for each body of the condenser, so that it is possible to manage each body. become. Further, the driving operation is simplified as compared with the case where the operation is performed for each water chamber.
[0020]
【The invention's effect】
According to the present invention, the condenser cooling water outlet mother pipe shared by each body of the condenser is provided with a ball collector of the cleaning device, and the number of the collectors can be made smaller than the number of bodies, so that the power plant can be used. This has the effect of reducing the installation space for the condenser and reducing maintenance work.
[0021]
In addition, according to the operating method of the present invention, since the washing operation of the condenser can be performed for each body, the heat conductivity of the condenser cooling pipe can be recovered and the foreign matter can be removed and managed for each body.
[Brief description of the drawings]
FIG. 1 is a circulation diagram of a condenser including a ball cleaning device according to an embodiment of the present invention.
FIG. 2 is a transition diagram of device states for explaining an operation procedure of the condenser cleaning device in the configuration of FIG. 1;
FIG. 3 is an external view of a condenser provided with a ball cleaning device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Condenser, 2 ... Circulating water pump, 3 ... Cooling water inlet mother pipe, 4 ... Water chamber, 41 ... Cooling pipe, 5 ... Cooling water inlet pipe, 6 ... Cooling water outlet pipe, 7 ... Cooling water outlet mother Pipe, 8: Ball, 9: Ball collector, 10: Ball removal pipe, 11: Ball circulation pump, 12: Ball recovery pipe, 13: Ball injection pipe, 15: Flow path switching device, 20: Control device.

Claims (3)

A condenser having a plurality of barrels, a counterflow water chamber in each barrel, and a cooling water inlet pipe and a cooling water outlet pipe in each of the water chambers, and the cooling water in each of the counterflow directions. In a circulating water system of a condenser having two cooling water outlet mother pipes joined with an outlet pipe,
A ball collector is disposed in the cooling water outlet mother pipe, and a flow path switching unit for distributing the cleaning balls collected by the ball collectors having a smaller number of the cylinders to the cylinder unit is provided. And condenser bowl cleaning equipment. A condenser having a plurality of barrels, a counterflow water chamber in each barrel, and a cooling water inlet pipe and a cooling water outlet pipe in each of the water chambers, and the cooling water in each of the counterflow directions. In a circulating water system of a condenser having two cooling water outlet mother pipes joined with an outlet pipe,
A ball collector provided in the cooling water outlet mother pipe, a ball circulation pump for taking out and circulating the collected cleaning balls, and a flow path switching means for distributing the cleaning balls joined from the two systems to the body unit A ball recovery device provided for each of the body and the body to switch between recirculation and recovery of the cleaning ball distributed by the flow path switching means; A condenser ball cleaning device, comprising: a ball injection pipe for injecting into two cooling water inlet pipes. A condenser having a plurality of barrels, a counterflow water chamber in each barrel, and a cooling water inlet pipe and a cooling water outlet pipe in each of the water chambers, and the cooling water in each of the counterflow directions. In a method of operating a ball cleaning device in a circulating water system of a condenser having two cooling water outlet mother pipes having joined outlet pipes,
At the time of the washing operation, a flow switching means is provided at a merging position of the two systems of the collected washing balls, in which the ball collectors provided in each of the cooling water outlet mother pipes are collected, and distributed to the body unit. A method of operating a condenser ball cleaning apparatus, wherein control is performed such that cleaning balls are distributed only to an arbitrary body.

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