JPH02302591A - Corrosionproof and contamination preventive control device for condenser - Google Patents

Abstract

PURPOSE:To always accurately bring the inner face state of a monitoring tube into coincidence with that of a condenser tube and to extremely accurately know the inner face state of the real condenser tube by monitoring by measuring cooling wafer flow rate of a condenser body, calculating the flow rate per one tube, and so automatically regulating the flow rate of the cooling water of the monitoring tube in coincidence therewith. CONSTITUTION:In the performance monitoring of the tube of a real condenser using a monitoring tube, when a variable blade opening meter 56 detects the flow rate of cooling water flowing in a condenser body 2, a flow rate controller 60 calculates the flow rate of the cooling water per one of condenser tubes 14 therefrom. An electromagnetic flowmeter 62 detects the flow rate of the water flowing in a monitoring tube 32. An electrolyte drive type regulating valve 66 sets the flow rate of the water flowing in the monitoring tube. The controller 60 compares the detected flow rate value of the tube 32 detected by the flowmeter 62 with the flow rate value of the water per one of the tubes 14 calculated by the controller 60, and controls the set flow rate of the valve 66 so that they coincide.

Description

[Detailed description of the invention] (Technical field) The present invention performs anti-corrosion and anti-fouling management of the inner surface of condenser pipes in condensers used in power plants such as thermal power and nuclear power plants and plants such as chemical factories. It relates to a device for.

(Background Art) As this type of device, conventionally, a condenser is equipped with a condenser tube made of a copper alloy, and seawater or river/seawater is made to flow through the condenser tube as cooling water. This structure is equipped with an iron ion implantation device and a sponge ball injection device, and performs anticorrosion and antifouling management on the inner surface of the condenser pipe by forming an anticorrosive film by implanting iron ions and removing deposits on the inner surface by cleaning the sponge balls. It is known that the condition of the anti-corrosion film formed on the inner surface of the condenser tube, sludge, etc.
Because it is difficult to accurately grasp the state of adhesion of corrosion products, slime (suspended matter), etc., it is difficult to control the operation of the installed iron ion implantation equipment and sponge ball injection equipment. It has been difficult to take optimal anti-corrosion and anti-fouling measures for water pipes.

For this reason, the present inventors first applied for patent application No. 60-2677.
No. 00 (Japanese Unexamined Patent Publication No. 62-129698), a condenser tube with the same specifications is installed as a monitor tube in a bypass system installed separately from the condenser body, and the extra-pipe performance is constantly monitored by a sensor attached to it. A device configured to do this was revealed. That is, in such a device, apart from the condenser main body, a monitor pipe of approximately the same size as the condenser pipe is connected to the condenser pipe so that the same cooling water can be passed under the same water flow conditions. This monitor tube is treated as a representative condenser tube of the condenser body, and a predetermined polarization resistance measurement means and dirt detection means are installed on this monitor tube, and based on the detection information from these means, This system activates the iron ion implantation device and sponge ball injection device in the condenser body, and thereby improves the inner surface condition of the condenser tubes in the condenser body, and ultimately the corrosion resistance of the condenser tubes. This made it possible to monitor the heat transfer properties and maintain the inner surface in a suitable condition.

By the way, in a device in which a monitor pipe is installed in such a bypass system, in order to perform accurate performance monitoring, it is necessary to make the inner surface condition of the monitor tube as similar as possible to the inner surface condition of the actual condenser tube. In particular, the formation of a film on the inner surface of the tube due to iron ion implantation, the adhesion of slime, etc. to the inner surface of the tube, and the state of corrosion of the tube are caused by the flow of cooling water inside the tube! (flow velocity), so in order to accurately monitor performance, it is especially necessary to accurately match the flow rate of cooling water in the actual condenser pipe and the monitor pipe.

Conventionally, in anti-corrosion and anti-fouling control devices using such monitor pipes, the following two methods have been used to match the flow rate of cooling water flowing through the monitor pipes with the flow rate of cooling water flowing through the actual condenser pipes. Two methods were adopted. In other words, the first method is to install a system in the cooling water intake section of the bypass system so that the flow rate of cooling water in the actual condenser pipe and the amount of cooling water flowing into the monitor pipe match under the rated load condition of the power generation turbine, etc. This method allows the amount of cooling water flowing into the monitor pipe to naturally fluctuate in response to fluctuations in the amount of cooling water flowing into the condenser body (actual condenser pipe) by setting the opening degree of the manual valve. In the second method, whenever the amount of cooling water flowing into the condenser body changes, the opening degree of the valve installed in the cooling water intake section of the bypass system is manually adjusted, thereby reducing the amount of cooling water flowing into the monitor pipe. This method matches the flow rate of water to the flow rate of cooling water flowing into the actual condenser pipes.

However, in the former method, although the cooling water flow rate of the actual machine condenser pipe and that of the monitor pipe match accurately under the rated load condition of the power generation turbine, etc., at other times,
In other words, when the power generating turbine, etc. is not in the rated load state, the cooling water flow rates in the actual condenser pipe and the monitor pipe do not necessarily match. In most cases, the flow rate of cooling water to the condenser body is changed depending on the water temperature, and recently, the power generation unit has to be started and stopped repeatedly depending on the power demand.
Considering that the 5-tart and 5-top system is being adopted and the amount of cooling water flowing through the power plant condenser frequently fluctuates,
The reality is that it is by no means a desirable method.

In addition, in the latter method, the valve must be manually operated every time the amount of cooling water flowing into the condenser body changes, so the more fluctuations in the amount of cooling water flowing, the more difficult it is to operate the valve. There was a problem in that the labor required increased and the costs associated with it increased, resulting in an economic disadvantage.

(Problem to be solved) The present invention has been made against the background of the above, and the problem to be solved is to solve the problem of condenser pipes in an actual condenser using a monitor pipe. In performance monitoring, regardless of fluctuations in the flow rate of cooling water flowing into the condenser pipes of the actual condenser, the flow rate of cooling water flowing into the monitor pipes is automatically and accurately matched to that of the condenser pipes of the actual equipment, thereby improving accuracy. The purpose is to enable excellent monitoring to be carried out stably and economically.

(Solution Means) In order to solve this problem, the present invention includes a condenser pipe made of a copper alloy, and allows seawater or river/seawater to flow through the condenser pipe as cooling water. In the condenser, an iron ion implantation device and a sponge ball injection device are provided, and a monitor tube of approximately the same material and size as the condenser tube is installed outside the condenser body. It is installed in the bypass line of the condenser pipe so that the same cooling water as that of the condenser pipe is passed through, and based on the polarization resistance value and inner surface dirt condition detected in the monitor pipe, In the anti-corrosion and anti-fouling management device which activates the iron ion implantation device or the sponge ball injection device to form an anti-corrosion film on the inner surface of the condenser pipe or to clean the sponge balls, there is provided the following: (a) the condenser main body; a first flow rate detector that detects the flow rate of cooling water flowing into the (
b) Flow rate calculation for calculating the cooling water flow rate per condenser pipe installed in the condenser body from the first flow rate detection value detected by the first flow rate detector. means and (C)
a second flow rate detector that detects the flow rate of the cooling water flowing into the monitor pipe; (d) a flow rate setting device for setting the flow rate of the cooling water flowing into the monitor pipe; and (e) the second flow rate detector. The second flow rate detection value detected by the flow rate detector is compared with the flow rate value of cooling water per condenser pipe determined by the flow rate calculation means, and the flow rate value is adjusted so that they match. It was decided to provide a comparison control means for controlling the set flow rate of the flow rate setting device.

(Example) Hereinafter, in order to clarify the present invention more specifically,
Some embodiments thereof will be described in detail based on the drawings.

First of all, FIG. 1 shows an overall view of a condenser equipped with a device according to the invention. There, 2 is a condenser main body, and as is well known, it includes a large body 4 and ice chamber forming members (ice chamber II) 6.6 that close both side openings of the body 4. ing. Between the body portion 4 and the rainwater chamber forming member 6°6, two tube plates 8, 8 are provided facing each other so as to partition the inner space.
As a result, the steam chamber 10 is located in the center of the inner space.
However, ice chambers 12 and 12 are formed on both sides.

The steam chamber 10 has two tube plates 8 extending through the steam chamber 10.
．． A large number of copper alloy cooling pipes (condenser pipes) 14 are disposed so as to span between the ice chambers 12 and 12, and the ice chambers 12 and 12 are communicated with each other through these cooling pipes 14. A water supply pipe 20 is connected to one side of the ice chambers 12 and 12 communicated through the cooling pipe 14, and a drain pipe 26 is connected to the other side, so that predetermined cooling such as seawater is supplied from the water supply pipe 20 to one of the water chambers 12. While water is being supplied, such cooling water is made to flow through each cooling pipe 14 to the other water chamber 12 and is discharged from the discharge pipe 26.

On the other hand, steam is supplied to the steam chamber 10 from a steam inlet 16 formed in the upper part of the body 4, and the steam supplied into the steam chamber 10 is applied to the outer peripheral surface of the cooling pipe 14. Upon contact, it condenses and liquefies. The condensed water of the condensed and liquefied steam is recovered through a condensate outlet 18 formed at the lower part of the body 4.

Here, a water supply pipe 20 that leads cooling water to the water chamber 12 of the condenser main body 2 is provided with an iron ion implantation device 22 and a sponge ball injection device 24, and by the operation of these devices, the condenser Iron ions are injected into the cooling water supplied to the water chamber 12 of the main body 2, and further into the cooling water flowing through the cooling pipes 14 to form a predetermined anti-corrosion film on the inner surfaces of the cooling pipes 14, or 14 A sponge ball is inserted to remove deposits on the inner surface and clean it.

As is well known, the iron ions injected into the cooling water from the iron ion implantation device 22 are dissolved and supplied to the cooling water as water-soluble iron compounds such as ferrous sulfate, and the iron ion concentration is , usually 0.03' to 0.5 ppm
It is set to a certain degree.

In addition, the sponge balls thrown into the cooling water from the sponge ball throwing device 24 generally have a diameter of about 21 m larger than the inner diameter of the cooling pipe 14, and the number of sponge balls thrown into each cooling pipe 14 is The number is set so that an appropriate number of them can pass through.

Furthermore, the iron ions and sponge balls injected into the cooling water from the iron ion implantation device 22 and the sponge ball injection device 24 reach the other water chamber 12 through the cooling pipe 14, and then flow through the drain pipe 26 to the condenser main body. 2, the sponge balls are collected by a collection device (not shown) provided in the drain pipe 26 and guided to the sponge ball input device 24 through the collection pipe 28. .

By the way, between the water supply pipe 20 and the drain pipe 26, there is a part of the water supply pipe 20 upstream of the connection part with the sponge ball feeding device 24, and a part of the water supply pipe 20 downstream of the connection part with the sponge ball collection pipe 28. A bypass line 30 is provided so as to bypass the condenser main body 2 while connecting to the drain pipe 26 on the side. A monitor tube 32 of approximately the same material (copper alloy) and approximately the same size (length, outer diameter, and wall thickness r) as the cooling tube I4 of the water dispenser body 2 is installed. Here, the water supply pipe 20 is located at a part of the water supply pipe 20 further upstream than the connection part with the monitor line 30.
．． A circulating water pump 34 is provided for sending cooling water to the water chamber 12 of the condenser main body 2 through the cooling water pump 34. Some of the cooling water flows into bypass line 3.
0, and by extension, water can be passed through the monitor pipe 32 as well. That is, in this embodiment, the same cooling water as the cooling water that is made to flow through the condenser pipe (cooling pipe 14) of the actual condenser (condenser body 2) is provided on the bypass line 30. The water is allowed to flow through the monitor tube 32 that is connected to the monitor tube 32.

Here, the bypass line 30 is connected to the monitor pipe 32,
The monitor pipe 32 includes a water intake side flow path 36 that connects the monitor pipe 32 and the water supply pipe 20, and a drainage side flow path 38 that connects the monitor pipe 32 and the drain pipe 26. The condenser main body 2 is connected to each of the flow passages 36 and 38.
Similar to that of the cooling pipe 14 in , a monitor pipe water chamber 40 and a monitor pipe pipe vi (not shown) are provided. A monitoring mechanism similar to the device previously proposed by the inventors in Japanese Patent Application No. 60-267700 is provided for the bypass line 30 in which the monitor tube 32 is disposed in this manner. That is, the polarization resistance measuring device 42 and the monitor tube 3 are located in the middle of the monitor tube 32 and are used to detect the polarization resistance value of the monitor tube 32.
A contamination meter 44 for detecting the contamination state on the inner surface of the monitor tube 2 is provided in an appropriate arrangement configuration, and a sponge ball for the monitor tube is inserted into the water intake flow path 36 on the upstream side of the monitor tube 32. A device 46 is provided.

In addition, in the figure, 48 is a sponge ball counter for counting the number of sponge balls thrown into the monitor tube 32 from the sponge ball throwing device 46, and 50 is a
This is a sponge ball recovery device for a monitor tube for recovering sponge balls that have passed through the monitor tube 32, and also includes a monitor tube 52.
is a float-type flowmeter for visually checking the flow rate of cooling water flowing into the monitor tube 32.

By the way, the circulating water pump 34 that feeds cooling water to the water supply pipe 20 is provided with a variable blade opening gauge 56 for measuring the opening degree of its variable blades.
A signal representing the opening degree of the variable vane of the circulating water pump 34 measured at is supplied to the flow rate control device 60 via the insulating converter 58. Then, in the flow rate control device 60, based on the signal from the variable blade opening gauge 56, the water chamber 12 of the condenser main body 2, and furthermore, the flow rate per cooling pipe 14 provided in the condenser main body 2 is determined. The flow rate is now calculated.

The flow rate of the cooling water pumped to the water supply pipe 20 by the circulating water pump 34, that is, the flow rate of the cooling water supplied to the water chamber 12 of the condenser main body 2 through the water supply pipe 20, depends on the opening degree of the variable blades of the circulating water pump 34. By detecting the opening degree of the variable blade of the circulating water pump 34 with the variable blade opening meter 56,
The flow rate of cooling water supplied to the water chamber 12 of the condenser main body 2 can be known, and therefore the variable blade opening gauge 56
Variable blade opening signal from the cooling pipe 1 in the condenser body 2
4, the flow rate of cooling water flowing through each cooling pipe 14 can be determined.

Note that a part of the cooling water flowing into the water supply pipe 20 by the circulating water pump 34 will be diverted to the bypass line 30 as described above, but the amount of cooling water diverted to the bypass line 30 is as follows. As will become clear from the explanation below, one of the cooling pipes 14 provided in the condenser main body 2
The flow rate per cooling pipe 14 is set to be the same as the flow rate of cooling water flowing into the water supply pipe 20. Here, the flow rate of cooling water flowing into the water supply pipe 20 is expressed as the number of cooling pipes 14 installed (N). It is calculated as the value divided by one number (N+1). Incidentally, FIG. 2 shows the relationship between the opening of the variable blades of the circulating water pump 34 detected by the variable blade opening meter 56 and the amount of cooling water per cooling pipe 14 determined in this way. An example of a relationship is shown.

Further, as is clear from the above description, here, the variable blade opening meter 56 constitutes the first flow rate detector, and the flow rate control device 60 constitutes the flow rate calculation means.

On the other hand, on the water intake side flow path 36 of the bypass line 30 that leads the cooling water to the monitor pipe 32, an inlet manual valve 54 provided at the water intake of the water intake side flow path 36 and the sponge ball feeding device 46 are installed. An electromagnetic flowmeter 62 as a second flow rate detector for measuring the flow rate of cooling water flowing into the monitor pipe 32 is provided between the inlet manual valve 54 and the electromagnetic flowmeter 62. There is an electric/pneumatic drive as a flow rate setting device that pneumatically controls the positioner 64 according to the electric control signal to adjust the valve opening, thereby adjusting the flow rate of the cooling water flowing into the monitor pipe 32. Type control valve 6
6 is provided.

A signal representing the flow rate of the cooling water flowing into the monitor pipe 32 is supplied from the electromagnetic flowmeter 62 to the flow rate control device 60. The monitor tube 32 represented by the signal
The cooling water flow rate is compared with the cooling water flow rate per cooling pipe 14 determined based on the variable blade opening signal from the variable blade opening meter 56, and an electric current is applied to match the cooling water flow rate per cooling pipe 14. A control signal (generally a PID control signal) is output from the flow controller 60 to an electrically/pneumatically actuated control valve 66 . That is, as a result, the electric/air-driven control valve 66 is opened so that the amount of cooling water flowing into the monitor pipe 32 matches the amount of cooling water flowing into one of the cooling pipes 14 provided in the condenser main body 2. The temperature of the cooling pipe 14 of the condenser main body 2 is adjusted relative to the monitor pipe 32.
Regardless of fluctuations in the flow rate of cooling water flowing into the cooling pipe 1,
The same flow rate of cooling water as that flowing through one of the four pipes is allowed to flow.

Note that, as is clear from the above description, the flow rate control device 60' here serves both as a flow rate calculation means and a comparison control means. Further, in the figure, 65 is an air pressure supply source that supplies pressurized air to the positioner 64 via the air filter 67, and 68 is an outlet manual valve disposed at the most downstream part of the bypass line 30.

Therefore, in such a condenser, the cooling water flowing into the cooling pipe 14 of the condenser main body 2 and the cooling water flowing into the monitor pipe 32 are of the same quality, and the flow rates of the cooling water flowing therethrough are always made to match with high accuracy. The condenser body 2
By performing the operation of inserting sponge balls into the cooling pipe 14 and the monitor pipe 32 in the same way, the degree of contamination on the inner surface of the monitor pipe 32 and the state of anticorrosive film formation on the inner surface of the monitor pipe 32 can be checked from the condenser main body 2. Therefore, by using the polarization resistance measuring device 42 and the dirt meter 44 installed in the monitor tube 32, the inner surface condition of the cooling tube 14 of the condenser body 2 can be accurately matched with the condition of the cooling tube 14 of the condenser body 2 over time. It becomes possible to accurately grasp the changes, and in turn, it becomes possible to more appropriately control the operation of the iron ion implantation device 22 and the sponge ball injection device 24, and the inner surface of the cooling pipe 14 can be managed more accurately. It becomes possible.

Incidentally, Fig. 3 shows a case in which the anti-corrosion/anti-fouling management device configured as in this embodiment is applied as the anti-corrosion/anti-fouling management device in the condenser of a thermal power plant with a rated output of 600 MW, and a circulating water pump (34 ) and the corresponding set flow rate (flow rate) of the cooling water in the actual condenser pipe (cooling pipe 14): relationship with Va, and the flow rate (flow rate) of the cooling water flowing into the monitor pipe (32) :VB's circulating water pump (34) shows the results of measuring the fluctuating state due to changes in the variable blade opening.From the figure, it can be seen that the monitoring pipe (3
2) Flow velocity (flow rate) of the cooling water flowing in: vb extremely faithfully follows changes in the variable blade opening of the circulating water pump (34), and determines the setting of the cooling water in the actual machine condenser pipe' (14). Flow rate: Va
It is recognized that the inner surface condition of the monitor pipe (32) matches the actual condenser pipe (14) with high accuracy, regardless of the fluctuation in the flow rate of cooling water flowing into the actual condenser pipe (14). It is recognized that the change accurately matches the inner surface condition of the tube (14). In this anti-corrosion/anti-fouling management device, the pipe diameter of the bypass line (30) is set to 40A, and the monitor pipe (32) has an outer diameter similar to that of the actual condenser pipe (14). 25.4 mm (1
''), an aluminum brass tube with a wall thickness of 1.24 aus was used.

Next, we will discuss the case where the present invention is applied to an anti-corrosion and anti-fouling management device for a condenser that has a so-called backwashing function that allows cooling water to flow in the opposite direction to the cooling pipes of the condenser body. Another embodiment will be explained in detail based on FIG. Components that perform the same functions as those in the embodiment described above will be designated by the same reference numerals as those in the embodiment described above, and detailed explanations thereof will be omitted.

That is, in this embodiment, as shown in FIG. 4, a portion of the water supply pipe 20 between the installation portion of the circulating water pump 34 and the connection portion of the sponge ball throwing device 24;
These water supply pipes 2 are in a state where they straddle the part of the drain pipe 26 on the downstream side of the branch part of the sponge ball recovery pipe 28.
Backwash channels 70 and 72 are provided to connect the drain pipe 26 and the drain pipe 26. A backwash valve 74 is provided at a connection part with one of the water supply pipes 20 and a connection part with the other drain pipe 26 of the backwash channels 70 and 72, thereby configuring a backwash mechanism. . That is, by switching the backwash pulps 74 and 74 of the backwash mechanism, the condenser main body 2
The direction of flow of cooling water into the cooling pipe 14 can be switched between the forward direction indicated by the solid line arrow and the reverse direction indicated by the broken line arrow in FIG. 4.

By the way, in a condenser equipped with such a backwash mechanism,
As shown in FIG. 4, the portion of the water supply pipe 20 between the connection portion with the backwash flow path 70.72 and the installation site of the circulating water pump 34, and the backwash flow path 70.72. A bypass line 30 is provided to connect a portion of the drain pipe 26 on the downstream side of the connection portion with the drain pipe 26, thereby ensuring that the cooling water is of the same quality as the cooling water flowing through the cooling pipe 14 of the condenser main body 2. cooling water can be passed through the bypass line 30.

The bypass line 30 is configured to include an intake side flow path 36 having an inlet manual valve 54 and a drainage side flow path 38 having an outlet manual valve 68, as in the above embodiment. Differently, a four-way valve 76 is provided between the water intake side flow path 36 and the drainage side flow path 38; It is configured to be selectively connected to both ends of the loop flow path 78 via. A monitor tube 32 is disposed in the middle of the loop flow path 78, and depending on the switching state of the four-way valve 76, the monitor tube 32 is configured to operate in the forward direction indicated by the solid line arrow and in the forward direction indicated by the broken line arrow in the figure. The flow direction of the cooling water with respect to the loop flow path 78, that is, the flow direction of the cooling water with respect to the monitor tube 32 can be switched between the opposite direction.

Here, the loop flow path 7B has an upstream flow path 80 on the upstream side in the forward direction and a downstream flow path 82 on the downstream side of the monitor tube 32, and these upstream flow paths 80 and downstream At the connection portion of the side flow path 82 with the monitor pipe 32, the monitor pipe water chambers 40 each having a monitor pipe tube plate are provided, as in the previous embodiment, and these monitor pipe water chambers 40, 40 are provided.
A monitor tube 32 is disposed straddling between both tube plates.

The monitor tube 32 is provided with a polarization resistance measuring device 42 and a dirt meter 44 similar to those in the embodiment described above, and the upstream channel 80 is provided with a sponge ball feeding device 46 for the monitor tube similar to the embodiment described above. and sponge ball counter 48
However, further downstream flow paths 82 are provided with monitor tube sponge ball recovery devices 50, respectively.

Note that the four-way valve 76 is switched in conjunction with the backwash valve 74, and is operated from the water chamber 12 on the water supply pipe 20 side to the water chamber 12 on the drain pipe 26 side. When the cooling water is passed in the forward direction through the cooling pipe 14,
Cooling water is passed in the forward direction to the loop flow path 78 (monitor pipe 32), and the water supply pipe 20 is passed from the water chamber 12 on the drain pipe 26 side to the water supply pipe 20.
When cooling water is passed in the opposite direction through the cooling pipe 14 toward the side water chamber 12, the cooling water is passed in the opposite direction through the loop flow path 78.

Also, here, as illustrated, the monitor tube 32
A cathodic protection device 83 is provided for applying an anticorrosion potential to.

By the way, the water supply pipe 20 has such a bypass line 30.
An ultrasonic flow meter 84 is provided between the connection site with the backwash flow paths 70 and 72,
The flow rate of cooling water that is allowed to flow through the water supply pipe 20,
In other words, the flow rate of cooling water supplied to the water chamber 12 of the condenser main body 2 is detected by the ultrasonic flowmeter 84. Then, a flow rate signal representing the 2ii amount of cooling water supplied to the condenser main body 2 is transmitted to the ultrasonic flowmeter 84.
is supplied to the flow rate control device 60 via the insulated converter 5, and in the flow rate control device 60, the flow rate signal from the ultrasonic flow meter 84 is supplied to the condenser main body 2, as in the previous embodiment. The flow rate of cooling water flowing through each cooling pipe 14 is determined. That is, here, the ultrasonic flowmeter 84 constitutes the first flow rate detector, and similarly to the above embodiment, the flow rate control device 6
0 constitutes the flow rate calculation means.

Note that here, since the flow rate of cooling water detected by the ultrasonic flow meter 84 is the flow rate of cooling water supplied only to the condenser main body 2, the detected flow rate is calculated by the number of cooling pipes 14 ( The cooling water flow rate per cooling pipe 14 is calculated as the value divided by N).

On the other hand, on the other hand, the water intake side flow path 3 of the bypass line 30
A water pump 88 is provided on the upstream side of the artificial manual valve 54 and whose discharge amount is controlled by an inverter by a drive circuit 86. It is set by this water pump 88. Further, on the water intake side flow path 36 of the bypass line 30, a float-type flowmeter 52 and a second flow rate detector similar to the above embodiment are installed downstream of the inlet manual valve 54 and function as a second flow rate detector. An electromagnetic flowmeter 62 is provided, and the monitor pipe 3 is controlled by the float type flowmeter 52.
The flow rate of the cooling water flowing through the monitor tube 2 can be visually confirmed, and the flow rate of the cooling water flowing through the monitor pipe 32 can be detected by the electromagnetic flowmeter 62. Then, the flow rate signal representing the flow rate of the cooling water flowing through the monitor pipe 32 is transmitted to the electromagnetic flowmeter 6 as in the previous embodiment.
2 to the flow rate control device 60, and the flow rate control device 60
, the flow rate of cooling water per cooling pipe 1401 is compared, and a control signal corresponding to the difference in flow rate is supplied from the flow rate control device 60 to the drive circuit 86 of the water pump 88. The discharge amount of the water pump 88 is adjusted so that the flow rate of the cooling water flowing through the cooling water pump 32 matches the flow rate of the cooling water flowing through one of the cooling pipes 14. That is, here, the drive circuit 86
The water pump 88 including the above constitutes a flow rate setting device, and similarly to the embodiment described above, the flow rate control device 60 serves both as a flow rate control means and a comparison control means.

Therefore, in such a condenser, as in the condenser of the above embodiment, the cooling water flowing into the cooling pipe 14 of the condenser main body 2 and the cooling water flowing into the monitor pipe 32 are of the same quality, and there is no difference between them. The flow rate of the cooling water is always reduced in a friendly manner, and when the cooling water is made to flow in the opposite direction through the cooling pipe 14 of the condenser main body 2, the cooling water also flows in the opposite direction into the monitor pipe 32. Therefore, the cooling pipe 14 of the condenser main body 2 and the monitor pipe 3 of the bypass line 30
2, the inner surface condition of the monitor tube 32 is made to match the inner surface condition of the cooling tube 14 with high accuracy, and the inner surface condition of the monitor tube 32 is Based on the state detection results, the inner surface of the cooling pipe 14 can be managed very well.

Incidentally, Fig. 5 shows a corrosion protection system with the same configuration as this example applied to a condenser of a thermal power plant with a rated output of 700 MW.
In the antifouling management device, the flow rate of cooling water supplied to the condenser main body (2) is measured using an ultrasonic flowmeter (
84), and the flow velocity (flow rate) of the cooling water per one pipe of the actual condenser pipe (cooling pipe 14) determined based on the measurement result: ■a and the second flow rate detector. This figure shows a comparison of the flow rate (flow rate) of cooling water flowing into the monitor pipe (32) measured by the electromagnetic flowmeter (62): Vb. If water flow to the bypass line (30) is stopped due to
In the figure, the flow rate of the cooling water flowing into the monitor pipe (32) of the bypass line (30) (except for the part indicated by code A)
It is recognized that the flow rate of the cooling water flowing into the actual machine condenser pipe (cooling pipe 14): ■a is exactly the same as the flow rate of the cooling water flowing into the actual machine condenser pipe (cooling pipe 14). , the inner surface condition of the monitor tube (32) is determined to be the actual condenser tube (14) regardless of the fluctuation in the flow rate of the cooling water flowing into the actual condenser tube (14).
It is recognized that the change accurately matches the inner state of 14).

In this anti-corrosion/anti-fouling control device, the pipe diameter of the bypass line (30) is set to 50A, and the monitor pipe (32) has an outer diameter similar to that of the actual condenser pipe (14). 32.75mm (1,25″) with a wall thickness of 1.24
mm aluminum brass tube was used.

Also, here, the water intake to the bypass line (30) is slightly different from the device shown in FIG.
), the seawater (cooling water) that is passed through the cooling water cooler is the same as the seawater (cooling water) that is passed through the cooling water cooler. In addition, the seawater taken in as cooling water is temporarily stored in a water tank and then sent to the bypass line (30) by a water pump (88).

Although the embodiments 2.3 of the present invention have been described in detail above, these are literal illustrations, and the present invention is not limited to these specific examples, and within the scope of the spirit thereof, It goes without saying that the present invention can be implemented in 8i format with various changes, modifications, improvements, etc.

For example, as the first flow rate detector and the second flow rate detector, various flowmeters with signal output functions other than those shown in the example can be used, and as the flow rate setting device and its control mechanism, other types of flow meters other than those shown in the example can be used. Various configurations can be adopted.

However, for the first flow rate detector, if you want to obtain high measurement accuracy, it is desirable to use a flow meter that directly detects the cooling water flow rate.However, in terms of cost and installation space, An advantageous method is to detect the variable blade opening of the circulating water pump and indirectly measure the cooling water flow rate.

(Effects of the Invention) As is clear from the above description, the present invention measures the flow rate of cooling water supplied to the condenser main body, and based on the measurement results, calculates the Cooling water flow rate per book (
This system measures the flow rate of cooling water flowing into the monitor pipe, and automatically adjusts the flow rate (flow velocity) of the cooling water flowing into the monitor pipe so that these flow rates match. Therefore, the flow rate of cooling water flowing into the monitor pipe must always accurately match the flow rate of cooling water flowing into the actual condenser pipe, and the inner surface condition of the monitor pipe must always accurately match that of the actual condenser pipe. Therefore, by adopting the device of the present invention, it becomes possible to know the inner surface condition of the actual condenser tube extremely accurately by monitoring the inner surface condition of the monitor tube. It becomes possible to manage the inner surface condition of the pipe more accurately than before, and furthermore, according to the device of the present invention, the flow rate of cooling water to the monitor pipe can be automatically controlled to fluctuate. This has the advantage of eliminating the need for labor to vary the amount of water flow, which is also economically advantageous.

[Brief explanation of drawings]

FIG. 1 is a schematic explanatory diagram showing one embodiment of the device according to the present invention, and FIG. 2 is a diagram showing the opening degree of the variable blade of the circulating water pump and the cooling to the actual condenser pipe in such a device. This is a graph for explaining the relationship between the flow rate of water and the flow rate of water. Figure 3 shows the relationship between the opening of the variable blades of the circulating water pump and the actual condenser pipe in an actual device configured as shown in Figure 1. 3 is a graph showing both the relationship between the flow rate of cooling water and the measurement result of the fluctuation state of the flow rate of cooling water to the monitor pipe due to the change in the opening degree of the variable blade of the circulating water pump. FIG. 4 is a schematic explanatory diagram showing another embodiment of the device according to the present invention, and FIG. 5 is a schematic explanatory diagram showing another embodiment of the device according to the present invention, and FIG. It is a graph showing a comparison between the measurement results of the fluctuation state of the water flow amount and the measurement result of the fluctuation state of the cooling water flow amount to the monitor pipe. 2: Condenser body 10: Steam room 12: Water room 14: Cooling pipe (actual condenser pipe) 20:
Water supply pipe 22: Iron ion implanter 24; Sponge ball charging device 26: Drain pipe 30: Pibath line 32: Monitor pipe 34: VIi ring water pump 42: Polarization resistance measuring device 44: Dirt meter 46: Sponge pole charging for monitor pipe Device 56: Variable blade opening meter (first flow rate detector) 60: Flow rate control device (flow rate calculation means; comparison control means) 62: Electromagnetic flow meter (second flow rate detector) 66: Electric/pneumatic drive type Control valve (flow rate setting device) 70.72: Backwash channel 76: Four-way valve 84: Ultrasonic flow meter (first flow rate detector) 88; Water pump (flow rate setting device) Figure 1 Figure 2 '71 FlIIIk (%) Figure 4

Claims (1)

[Scope of Claims] A condenser comprising a condenser pipe made of a copper alloy, through which seawater or river/sea water is passed as cooling water, which includes an iron ion implantation device and a sponge ball. While a charging device is provided, a monitor pipe made of substantially the same material and of substantially the same size as the condenser pipe is installed in a bypass line of the condenser pipe provided outside the condenser main body. Cooling water similar to that of the tube is made to flow through, and the iron ion implantation device or sponge ball injection device is operated based on the polarization resistance value detected in the monitor tube and the state of internal contamination, and the condensate water is An anti-corrosion and anti-fouling management device that forms an anti-corrosion film on the inner surface of a vessel or performs sponge ball cleaning, comprising: a first flow rate detector that detects the flow rate of cooling water flowing into the condenser body; a flow rate calculation means for calculating a cooling water flow rate per one of the condenser pipes arranged in the condenser main body from a first flow rate detection value detected by a first flow rate detector; a second flow rate detector for detecting the flow rate of the cooling water flowing through the monitor pipe; a flow rate setting device for setting the flow rate of the cooling water flowing through the monitor pipe; The second detected flow rate value is compared with the flow rate value of cooling water per condenser pipe determined by the flow rate calculation means, and the set flow rate of the flow rate setting device is adjusted so that they match. An anti-corrosion/anti-fouling management device for a condenser, characterized by comprising a comparison control means for controlling the condenser.