JPS6057398B2 - Demineralizer group operation status display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an operating state display device for a group of demineralizers, and particularly to a device for displaying the operating state of a condensate demineralizer in a nuclear power plant.

The water used in nuclear power plants must be maintained at a particularly high level of purity, and solids and ions in the inlet water are usually removed using a condensate desalter.

A plurality of condensate demineralizers, for example n, are installed, but one of them is always on standby during use. The one in standby mode is for continuous operation by switching over when the one currently in use performs backflow or regeneration. When a total of (n-1) condensate demineralizers are operating, the generator output can output the rated output. Backflow is a process in which when solid matter adheres to the demineralizer and the differential pressure between the inlet and outlet increases, the demineralizer is disconnected and the water is allowed to flow in the opposite direction to the normal direction to remove the solid matter. In addition, regeneration is an operation in which when the ion throughput of the demineralizer increases and its performance deteriorates, the ion throughput is reduced using chemicals to improve the performance. Here, the ion throughput is often determined by the product of the ion concentration difference between the inlet and the outlet and the amount of water passing through the demineralizer. In the following, the ion processing amount in this sense will be referred to as the water sampling amount. Cation and anion exchange resins are injected into the demineralizer, and regeneration is performed using sulfuric acid and caustic soda. Therefore, a large amount of waste liquid containing these substances is generated during regeneration work. This waste liquid is treated in a liquid waste treatment system, but because it contains a large amount of sodium sulfate, it is mainly treated in a concentrator.
In recent years, the capacity of nuclear power plants has increased and their proportion in the grid has increased, so output control according to the load is being considered, but if the output is changed, the amount of steam generated changes and condensate desalination The amount of water collected in the vessel will also change.

In this case, the differential pressure increase rate and performance deterioration characteristics of the condensate demineralizer are approximately proportional to the amount of water sampled by the demineralizer, but if the demineralizer is not operated in consideration of the standby demineralizer, backwashing or It is conceivable that the period until regeneration will change, and therefore two or more units will have to be backwashed or regenerated at the same time. However, (n
-1) Since rated output operation is possible only for one unit, there is a problem that if two units enter the backwash regeneration state at the same time, rated output operation will not be possible. By the way, the processing speed of concentrators is usually low, and the resin regeneration work is also irregular, so there are cases where a large amount of waste liquid must be treated due to the generation of waste liquid at the same time.

In this case, the waste liquid must also be treated, which not only requires a great deal of labor, but also may delay resin regeneration for several days. To avoid this, there is a method of frequently treating the waste liquid in the collection tank so that it is always empty and accepting a large amount of waste liquid generated during regeneration. This method has the disadvantage that it increases the labor of the operator and further reduces the utilization rate of the tank, reducing the efficiency of the entire treatment system. Another method is to increase the throughput of the concentrator.

This method requires an increase in the heating boiler capacity, installation area, etc., and also reduces the utilization rate, making it difficult to achieve a significant increase. In view of the above points, the present inventor has specially developed a desalination group control device that controls the operation of desalination devices, disperses the amount of water sampled, performs regeneration work smoothly, and efficiently operates a liquid waste treatment system. It has been filed as Application No. 49-93421 (Japanese Patent Publication No. 53-47228). The present invention provides control in this manner. The purpose of this invention is to provide a device that monitors and displays the control status. In other words, regeneration work is carried out when the desalination equipment becomes so chemically contaminated that sufficient desalination cannot be performed as it is. The method focuses on an index indicating the degree of contamination and displays it.

The index indicating the degree of contamination is, for example, the electrical conductivity of the water at the outlet of the demineralizer, and in the following explanation, it will be expressed in terms of the amount of water sampled.
Figure 1 shows the configuration of the main steam condensate system and recycle and raw waste liquid treatment system of a nuclear power plant.

The former system is constructed by sequentially connecting a nuclear reactor 1, a steam turbine 2, a condenser 3, condensate desalters 4, 5, 6, and a water supply pump 8. The latter system includes resin regeneration devices 901 and 902.
, 903, a waste liquid collection tank 10 and a waste liquid treatment device 11 are sequentially connected. Furthermore, switching valves 12, 13, 14, flowmeters 15, 16, 17, and conductivity meters 18, 19, 20, 21, 22, 23 are inserted into the former system,
Differential pressure gauges 24, 25, 26 are arranged in parallel to each demineralizer 4, 5, 6. These, switching valves 12, 13, 1 male flowmeter 1
5, 16, 17, conductivity meters 18,...22, 23, differential pressure gauges 24, 25, 26, and the resin l regeneration device 90
1,902,903, the control device 27 connects the signal lines 30,3
1...44 and 450, 451, 452. The above conductivity meter 18, 19, 20, 21, 22
, 23 detect the electrical conductivity on the input side and outlet side of the condensate demineralizers 4, 5, and 6. The flow meters 15, 16, 17 detect the processing flow rate, and the differential pressure gauges 24, 25, 26 detect the differential pressure between the inlet and outlet of each demineralizer 4, 5, 6. The control device 27 stores the states of the condensate demineralizers 4, 5, and 6 by comprehensively calculating the above detection results, and calculates the difference in the water sampling amount of each demineralizer 4, 5, and 6 to a predetermined value. The operation is controlled so that the value of . By the output of this control device 27,
The switching valves 12, 13, and 14 are controlled to switch. Further, a display device 28 for displaying the operating status of each desalination device added according to the present invention and an input device 29 for externally supplying signals to the control device 27 are connected by signal lines 46, 47, and 48. There is.

Further, a generator 2A is connected to the steam turbine 2.
Next, the control device 27 is shown in FIG. 2, FIG. 3, FIG.
This will be explained based on Figure 0.

This control device 27 is actually a computer, and the input to this control device is sampled and taken in at a predetermined sampling period. FIG. 2 shows the control device 27 classified by operating function. 54, 55...
・Connected with 60. The input data processing device 49 includes signal lines 33, 34...44 and 450, 451, 45.
2 is connected to the valve switching control device 52, and the signal lines 30, 3 are connected to the valve switching control device 52.
1 and 32 are connected to the display control device 53 added according to the present invention, the display device 28 is connected via signal lines 46 and 47.
is connected to the main controller 50, and an input device 29 is connected to the main controller 50.
are connected by a signal line 48. FIG. 3 shows details of the input data processing device 49, with comparators 61, 62
, subtractor 63, multiplier 6, integrator 65, function generator 66
It consists of Comparators 61, 62, multiplier 64,
Signal lines 33, 34...44 are connected to the function generator 66, and predetermined calculation results are output to 54A, 54B...54E. Terminals 67 and 68 are input with the standard conductivities of the treatment liquid on the inlet and outlet sides of the demineralizer. FIG. 5 shows details of the valve switching control device 52, including a timer device 69, arithmetic devices 70, 71...77, and the valve switching device 7.
It consists of 8. Timer device 69, calculation device 7
0, 71, 74 and the valve switching device 78 are connected to signal lines 54E, 54D, 54B, 57C and 48, respectively.
, 32, a confirmation signal is output to 58. Each calculation device 7
2, 73, 75, 77 have terminals 79, 80, 81, 82
are provided, and the backwashing start differential pressure, regeneration start water sampling amount, water sampling amount adjustment start setting value, water sampling amount adjustment stop setting value, and backwashing and regeneration determination setting values are each input. FIG. 10 shows details of the display control device 53, which is composed of a display drawing creation program 83 and subprograms 84, 85, and 86. In the display drawing creation program 83, the main controller 50 and the display device 28 are connected to the signal lines 29, 60, 4.
6 and 47. Next, the display device 28 will be explained based on FIG. 8. The display device 28 is disclosed, for example, in Japanese Patent Publication No. 49-7615 1 character display device, and includes a control circuit CRl, a color code, a refresh memory CR2 for storing character codes, a color code,
Decoder CR3 for identifying character codes, color control circuit CR4, character generation circuit CR5, electron guns CR6, CR7,
It consists of a CR8 and a color cathode ray tube CR9. The refresh memory CR2 is connected to the display control device 53 of the external control device 27 through signal lines 46 and 47. In the storage device 51, a decoder and a program required by the control device 27 are stored. for example,
These include the amount of water sampled by the condensate demineralizer and the pixel pattern required for color CRT display. Next, the effect will be explained.

First, in FIG. 1, steam generated in a nuclear reactor 1 powers a steam turbine 2, is then liquefied in a condenser 3, and this water is purified in demineralizers 4, 5, and 6.

Water is then supplied to the reactor 1. Water used in nuclear reactors must be purified to a particularly high degree of purity, and condensate desalination equipment 4,
In 5 and 6, ions and cladding in water are mainly Fe2O,
However, in order to maintain the specified performance, the demineralizer 4
, 5, 6 are appropriately recycled to resin regenerating devices 901, 902,
903, where backwashing or regeneration work is performed.
The backwashing and regenerating waste liquid at this time is collected in the waste liquid collection tank 10.
The waste water is then purified by the waste liquid treatment device 11 and sent to the condensate storage tank 7. Next, the operation of the control device 27 will be explained.

Flowmeter 15, 16, 17 Conductivity meter 18, 19...23
, differential pressure gauges 24, 25, 26 and resin regeneration device 901
, 902 and 903 are input to the input data processing device 49 of the control device 27. In FIG. 3, the signal lines 36, 37, 38, 42, 43, 44 from the conductivity meter of the treated liquid on the inlet side and the outlet side of the demineralizer are connected to the comparator 61,
62, and here, it is compared with the standard conductivity 67, 68 of the treated liquid on the demineralizer inlet side and outlet side, and if the following formula is satisfied, a signal is sent to 61A, 62A, and if it is not satisfied, a signal is sent to 61A, 62A. A signal is sent to 54A and 54C. Here, μ
m: Conductivity measurement value (μv/C!RL) μR:
Standard conductivity (μV/d) K1: Coefficient 1 This calculation is used to prevent condenser failure and seawater by outputting to terminal 54A when the conductivity μm on the demineralizer treatment liquid inlet side increases abnormally. Detects contamination, etc., and measures the electrical conductivity μ on the exit side.

This is for detecting a decrease in the performance of the ion exchange resin of the demineralizer by outputting the signal to the terminal 54C when the value increases abnormally. A subtracter 63 receives signals μm and μ from 61A and 62A. (difference in conductivity of water at the inlet and outlet of the demineralizer) and sends a signal ((μi−μo)) to the multiplier 64.
On the other hand, the signal θF from the flowmeters 15, 16, 17 is 33
, 34, 35 to the multiplier 64, and the subtracter 63
Multiplication is performed with the signal (μ "μ.") of the integrator 6
5 integrates the signal (μ, −μ.) F of the multiplier 64,
Output to 54B. That is, a signal expressed by the following equation is obtained at 54B. In addition, 150 is the amount of water sampled Q(t-Δ
t). Here, Q(t):
Current cumulative amount of water sampled Q(t-Δt): Total amount of water sampled before Δt time (ini μ0/C3E) μm:
Electrical conductivity of demineralizer inlet water (μV/C7l
) μo: Electrical conductivity of demineralizer outlet water (μV/Cm) F: Flow rate of passing water (Tre/h) Δt: Time width (h) Signal lines 33, 34, 35 from flowmeter and differential pressure gauge 2
Signal lines 39, 40, and 41 from 4, 25, and 26 are connected to a function generator 66 to determine the differential pressure at standard flow rate 54D.
Output to.

Figure 4 shows the relationship between flow rate and differential pressure in the condensate demineralizer.

Immediately after the demineralizer is backwashed or regenerated, it exhibits the characteristic of ΔP1, but during use, the differential pressure increases to ΔP2 and ΔP3. When the flow rate is the standard flow rate Fr, the backwashing operation is performed when the differential pressure reaches the set backwashing start differential pressure ΔPr, that is, when it becomes 0. However, if the flow rate is operated at a value F lower than the standard flow rate Fr, the differential pressure will be at a point of 0, which is less than ΔPr, even though the characteristics of the demineralizer are ΔP2. When the flow rate returns to Fr in this state, the differential pressure becomes 02, which exceeds the set backwashing start differential pressure ΔPr. In order to prevent this, backwashing may be performed at a point where the differential pressure is 0 when the flow rate is F1. That is, the function generator 66 generates the value ΔP2 shown in FIG. 4, and uses this, the actual flow rate, and the differential pressure to calculate the differential pressure at the standard flow rate. Resin regeneration device 901
, 902, 903 signal lines 450, 451, 452
is connected to 54E. These results are sent to the main controller 50 via the signal line 54 and to the storage device 51 via the signal line 55. The same applies to FIG. 3 and the following control circuits, but for example, block 66 in FIG.
This means that the information on the information lines 33, 34, and 35 connected to the block 66 is not input to the block 66 all at once and processed, but is input sequentially in a time-sharing manner and processed sequentially.

The storage device 51 has a portion for storing the status of the condensate demineralizer.

For example, the amount of water sampled at terminal 54B in FIG.
Memorize using the method shown in the figure. In FIG. 6B, the suffixed symbol M is the name of memory address 7, and the demineralizer 1 has M1.
M2 is assigned to the desalter 2, and M3 is assigned to the desalter 3. Ql, Q2, and Q3 are the current cumulative water intake values, (2
) is the solution to the equation. Ql, Q2, Q3 are respectively Ml and M
2. Memorize it. Next, according to the PO program, the water sampled is sorted in descending order of the amount of water sampled, and the results are M1″, M
2″, M3″. An example of a PO program is shown in FIG. 6A, and this method has already been disclosed. Using FIG. 6A, a method for arranging the water sampling amounts in ascending order will be explained. Now, the number of desalters is N=
3. Suppose that the calculation is started with the data of each water sampling amount M1 = 10%, M2 = 30%, and = 20%.

Take in Ml and M2 at P4 and P5 and compare M1 and pigeon at 2. Since M1>M2 is incorrect, move to P, and M1
and replace M2. At this stage, M1=30%, M2
= 10%, M3 = 20%. Next, in P8, J=2
Therefore, proceed to P9 and set J=3. M3 is taken in at P5, and M1 and M3 are compared again at P6. M1> The pigeon is correct, so move to P8 and then move to PlO. At this stage, M1=30%, M2=10%, and M3=20%, and the maximum value of M1 is determined. In PlO,
Store the maximum value M1 in M1″. Next, Pll, Pl
2 and I<! ．． Set J so that I=2 and J=3.

In Pl3, I and N are compared, but since ■=2 and N=3, the calculation moves to P4. At P4, M3 is fetched at P5, and at P6, M2 and M3 are compared. M2=10%,
= 20%, so it is incorrect for M2〉,
At P7, the data in M2 and M3 are exchanged. At this gain floor, M1=30%, M2=20%, and M3=10%.
Next, by P8, the calculation moves to PlO, and M2 is stored in M2''.Furthermore, by Pl3, the calculation moves to Pl4, the pigeon is stored in M3'', and the program stops. According to the above calculation, M1″=30%, M2″=20%, M3″=1
0%, which means that the data sorted in descending order of the amount of water sampled is stored. The data M1'', M2'', and M3'' are used for display on a CRT, which will be explained later.

Next, the operation of the valve switching control device 52 will be explained.

In FIG. 5, the signal 57 from the main controller 50 is the differential pressure of each demineralizer (output signal 54D in FIG. 3), the amount of water sampled (output signal 54D in FIG.
Output signal 54B in the figure), difference between the first and second water sampling amounts, 2
Difference between the 3rd and 3rd... ((57C) Resin regeneration device 90
1,902,903 (output signal 54 in Figure 3)
E), consisting of the signal 48 from the input device 29; When the resin regenerating devices 901, 902, 903 are not used, the computing devices 70, 71 connect the signal lines 54D, 5
Outputs the input from 4B as is.

The output of the arithmetic device 70 is input to the next arithmetic device 72.
This differential pressure input is compared with the set value from the terminal 79 by the calculation device 72, and as a result of the comparison, if backwashing is necessary,
An output is generated and input to the next arithmetic circuit 77. The arithmetic unit 77 selects one of the demineralizers 4, 5, and 6 that requires backwashing;
Determine if the earliest playback start matches.

As a result of the judgment, if they do not match, this arithmetic unit 77 generates an output and inputs it to the valve switching device 78, and if they match, backwashing or regeneration is determined by the following method. When Ts>Tb, backwash When Ts<Tb...(4
) If Ts>Rt, backwashing If Ts<Rt, regeneration Here, n is the time from backwashing to backwashing, Ts is the time until the start of regeneration, Rt is the set value for determining backwashing or regeneration, and This represents at least the usable time after washing.

If equation (4) is for backwashing, a signal is generated at terminal 77A, and for regeneration, a signal is generated at terminal 77B. Rt is R after backwashing
This is a numerical value indicating whether or not it can be used for t time. If this value is made small, regeneration will be performed immediately after backwashing, and if it is made large, regeneration will be performed even if there is desalting ability, so there is an optimal value. This value is for condensate demineralizers 4, 5, and 6.
It depends on the quality of the water being treated, but it is usually 0.1Tb~0.
It is liver degree. The arithmetic unit 73 compares the amount of water sampled with the amount of water sampled at the start of regeneration RQ from the terminal 80, and as a result of the comparison, if there is regeneration, or even though the planned amount of sampled water has not been reached, the outlet is closed for some reason. When the conductivity of the resin increases and it is recognized that the resin has broken, the signal is output and input to the valve switching device 78.

The timer device 69 is the resin regenerating device 901, 902, 90.
3, it generates an output after a time TA after the end of reproduction, and inputs the output to the arithmetic unit 74.

As a result, the arithmetic unit 74 inputs the signal 5C of the amount of water sampled from each demineralizer to the next arithmetic unit 75 when the output of the timer device 69 is generated. Here, TA is selected to a value that satisfies the following equation. 、． −
゛-"Here, ■ is the amount of waste liquid generated during resin regeneration (d)
, Fw is the processing speed (d/h) in the liquid waste treatment system, T
s represents the average time (h) from one regeneration to the next regeneration, and N represents the number of condensate desalters.

The arithmetic unit 75 generates a signal to perform adjustment when the difference between the first and second water sampling amounts and the difference between the second and third water sampling amounts is smaller than the water sampling amount adjustment start set value RRl, and the valve switching device 78, and if it is larger than the water sampling amount adjustment stop setting value RR2, the output is input to the next arithmetic unit 76.

The first sampled water amount is stored in FIG. 6B (7), M1th hour, M23rd, M3, etc., and data is extracted from there for calculation. Here, RRl and RR2 are selected to values that satisfy the following equation. In the above equation, RQ is the capacity of the desalter, that is, the set value at the start of regeneration.

Other signals are the same as in equation (5). The arithmetic device 76 sends a synchronization signal generated by the timer device 69 to the valve switching device 78 in order to operate the plurality of demineralizers 4, 5, and 6 on an average basis.

At this time, the desalters 4, 5, and 6 that are in standby mode are:
The longest period from the last waiting time to the present time is selected, that is, the one that has been driving for a long time. Further, the timer device 69 generates a signal at the end of backwashing and supplies it to the valve switching device 18. Then, the operations of debasing 4, 5, and 6 are made the same as before backwashing. Further, a manual input signal 48 operates the valve switching device. Upon each of the above inputs, the valve switching device 78 operates and outputs a switching confirmation signal to the valve switching device 58.

By the output of this valve switching device 78, the switching valves 12, 13,
14, a valve switching operation is performed. The priority order of this switching operation is as follows. 1. Do not switch during backwashing or regeneration work.

2 Switching adjustment by manual input.

3 Backwashing starts due to increase in differential pressure.

4. At the end of backwashing, operate the demineralizer in the same way as before backwashing.

5. Regeneration begins when a large amount of water is drawn or when it is recognized that the resin has broken.

6 Adjustments to be made when the amount of water sampled approaches.

7 Switching adjustment at fixed intervals.

Next, an example of controlling the operation of the four condensate demineralizers 1, 1, 2, and 2 will be described with reference to FIG.

In the figure, TA is the rest time after the end of regeneration, TC is the scheduled adjustment time, and RQ is the water sampling amount at the start of regeneration. now,
Consider a case in which the amounts of water sampled by the demineralizers 1, ■, ■, and ■ are approximately equal in the initial stage of operation of the condensate demineralizers 1, ■, ■, and ■.

At the point BI, the output signal of the arithmetic unit 75 shown in FIG. 5 is input and the demineralizer (2) is put on standby, and at the points B2 and B3, the demineralizer (2) is similarly put on standby. At the point Cl, the output signal of the arithmetic unit 76 is input and the demineralizer 1 is put on standby, and at the point C2, the demineralizer 2 is put on standby in the same manner. Demineralizer 1 in terms of AI
When the amount of water sampled reaches the reference value, the output signal of the arithmetic unit 73 is input and regeneration is started. After that, only TA is retained, and C
At point 3, the output signal of the arithmetic unit 76 is input, and the demineralizer (2) enters the standby state. By repeating the above operations,
In the conventional case, the demineralizers 1, 2, and 2 had to be regenerated near A1, but the situation is now dispersed as Al, A2, and A3.

In the characteristic shown in FIG. 7, no backwashing operation is shown. This is because backwashing work is usually done in 4 to 6 hours, which is small compared to the downtime after regeneration, and furthermore, after backwashing is completed, the operation of the condensate demineralizer is the same as before backwashing. Therefore, it does not appear on the scale shown in Figure 7-1. In the embodiment, there are three condensate demineralizers 4, 5, and 6, but this number varies depending on the power plant. This can be implemented depending on the number of cases. Next, the method of displaying the operating status of the condensate demineralizer is shown in Figures 8, 9, and 10.
This will be explained based on the diagram. Figure 8 shows the configuration of the display device, and the specific circuit is shown in Japanese Patent Publication No. 49-7615 No. 1.
Although it has been made clear in the text display device, the principle will be briefly explained. The display principle is a raster◆scan method, which is almost the same as commercially available television receivers, and the controller displays characters, symbols, etc. on the cathode ray tube by applying brightness modulation to the electron beam according to the shape of the characters and symbols. let

The external display control device 53 outputs the position code 46A1 color code 46B1 character code 46C through the signal line 46.
The signal is input to the reflex memory CR2. The color code is read out in synchronization with the scanning line of the display section, and decoder C
R3 identifies the red, green, or blue electron gun CR6, CR of the color cathode ray tube CR9 using the color control circuit CR4.
7. Instruct whether to apply brightness modulation to CR8. Figure 9 shows
In the case of 7 where one pixel is composed of 8 x 12 dots,
This shows an example in which the contents of addresses XlIYl, X2・Yl, X3・Y1 are converted into signals by the character generation circuit CR5.
The scanning line signal becomes SYl. As a result, the CRT CR9 has a position code of 46A1 and a color code of 46.
The specified contents (B1 character code 46C) are displayed.
FIG. 10 shows the configuration of the display control device 53.

In the display control device 53, the contents of the storage device 51 are taken in through the signal line 59 via the main control device 50. The captured data is created on the screen by the display drawing creation program 83, and the position code, color code, and character code are output to the display device 28 via the signal line 46. Next, the procedure for creating the drawing shown in FIG. 11 using the display control device 53 will be explained using FIGS. 12, 13, 14, 15, 16, and 17.

In Figure 11, Xl, X2...Xn, Xn+1...X
, n are addresses in the X direction of the drawing, Yl, Y2...Y2
,Yto,,Yk...Y! is the address in the Y direction. 1st
Figure 1 shows the display contents that do not change over time, such as the XV-4, Y-axis q1 titles, and the display contents that change over time, for example, the amount of water sampled in the condensate desalter. Table 7f:. 6. There is a cursor C7 for determining the magnitude relationship of the amount of water sampled. FIG. 14 is an example of the display drawing creation program 83.

When the program shown in FIG. 14 is activated by the main controller 50, drawing creation starts from the upper left position Xl, Y in FIG. Sl. , Sll steps are this.
In Sl2, memories are selected. If the memory storing the standard pattern is designated as 1 and the memory storing the special pattern is designated as 2, the memory 1 and memory 2 will be as shown in FIG. 12. Alphabetical characters, numbers, signals, etc. are prepared in advance in the memory 1, and special symbols are stored in the memory 2. One pixel is 8×12! If one word of memory is 16 bits, the storage capacity per pixel will be six words.

Specifically, the second English letter A in the memo I river in FIG. 12 becomes the data in the dot configuration and the data in FIG. 13a. Here, 0 means a point on the screen that does not shine, and 1 means a point that shines. If A is to be displayed in Xl and Yl in FIG. 11, memory 1 is selected using ``ji'' and information is retrieved from the location where A is stored in memory 1, for example, the second location in FIG.

This is step Sl3. Sl5. The color is designated at step 16, and the signal is transmitted to the refresh memory CR2 shown in FIG. 8 at step SI6. As a result, refresh memory Xl, Y
The English letter A and a color are input to l, and the display device 28 displays A at a predetermined position on the color CRT. Contents that change over time, such as the amount of water sampled in the condensate demineralizer, are stored in the memory 2 and displayed in the same manner as in the memory 1. A method for selecting the contents of memory 2 will be explained later. Sl
, , Sl8 moves the display position one by one in the X direction, and S2O and S2l control the display position to move it in the Y direction. In this way, when the pixel contents and colors are specified up to Xm and Yl, a predetermined screen is displayed on the color CRT, and the program shown in FIG. 14 ends. Next, a case will be described in which content that changes over time is displayed.

There are two possible ways to do this. The first method is
In this method, various patterns are stored in advance in the special memory 2 shown in FIG. 2, and a necessary pattern is selected at the time of display. The second method is to display a pattern, e.g.
This is a method in which C6 in FIG. 11 is associated with an address in the special memory 2, and the required pattern is stored in the special memory 2. The first method and the second method may be divided into uses depending on the display content. A method of displaying the amount of water sampled in the condensate demineralizer shown in FIG. 11 as shown in C6 using the first method will be explained. The data on the amount of water sampled is arranged in ascending order and stored in memories M″1, M″2, and M″3 in FIG. 6.No. 15
The figure shows the data taken from M″1 in Figure 6 and the 12th
This is a program for selecting the contents of the special memory 2 shown in the figure.
This program is one of 84, 85, and 86 in Figure 10.
and is activated when 83 programs need it. Now, 12 points in the vertical direction of one pixel are 20% of the water sampling amount.
If the patterns are classified in 5% steps, they can be classified into the following five types of patterns. This is 1 of memory 2 in Figure 12.
Let's say it's a dispute that includes items from 5th to 5th. 1 Pixels where all points do not shine... Indicates 0%.

2. The bottom three rows indicate the luminous pixels...5%.

3. The bottom 6 rows of pixels indicate 10%.

4 The bottom 9th row is a glowing pixel... Indicates 15%.

5. All of the pixels are illuminated, indicating 20%.

FIG. 13b shows the dot configuration and data of the pixels whose bottom six rows are illuminated. When FIG. 15 is activated after specifying the address in the X direction as Xn, data is taken out from M″1 in S3O.

Assume that this value is 26%. In S3l, this is divided by 20, and in S32, the decimal point is discarded to obtain 1. This means that if the vertical direction of one pixel is 20%, 26% is 20%.
This means that at least one pixel of % is used.
In S34, a Y-axis address is selected. The first time was S32 and J
= 0, and the Y axis is Yk. J in S35
~H2, the process moves to S39, and the fifth data in memory 2 in FIG. 12 is fetched. There are pixels here that all light up. The color is specified in S4O, and the data is sent to the refresh memory in S4l. With this operation, all the pixels at locations Xn and Yk light up and display 20%. In S42, since it is J¥, the process moves to S43, adds 1 to J, and returns to S34.
This is an operation in which 20% of 26% has been displayed, but the process returns to S34 in order to display the remaining 6%. In S34, the Y-axis is designated again, but in S43, J=1, and the Y-axis becomes YK-1. In S36, the result of S32 is subtracted from the result of S3l and multiplied by 4, and in S37, the decimal point is rounded to the nearest 4. This means that one pixel has 12 points in the vertical direction, and 2 points in the vertical direction.
If we divide it into 4 with 0%, 6% means that the bottom 3 rows will be illuminated. This is selected in S38, but the 12th
It is sufficient to import H4+1st of memory 2 in the figure. S4
Specify the color with O, and send it to the refresh memory with S4l, the lower three rows of pixels at locations Xn, YK-1 will light up,
In addition to the 0% display, 25%, which is closest to 26%, is displayed. In this example, the display is performed in 5% increments, but the definition of the memory 2 can be determined by determining the percentage of 12 points in the vertical direction of one pixel.

Next, a method of displaying the cursor shown in FIG. 11 C7 using the second method will be explained.

The second method is to associate the curve to be displayed, for example C7, with the address of the special memory 2, and store the required pattern in the special memory 2. Now, the number of condensate demineralizers is 3.
Assume that the water sample is a stand, and data on the amount of water sampled is stored in the memory shown in FIG. 6B.

This data is M″1=30%, M″2=20%, M″
Assume that 3=10%. FIG. 16 shows the data taken out from the memories M″1, M″2, M″3 in FIG.
This is a program that defines the sixth and subsequent parts of the special memory 2 in FIG. 2 as shown in FIG. 13C. This program is one of 84, 85, and 86 in FIG. 10, and is activated when the program 83 requires it. In FIG. 11, in order to display the amount of water sampled from three condensate demineralizers, five pixels are required in the horizontal axis direction at one pixel intervals. The amount of water sampled in the condensate demineralizer is displayed in a bar graph, with M゛1 in the horizontal axis direction Xn in Fig. 11, M″2 in Xn+2, and M″3 in Xn+4.
Consider the case where . If the cursor connects the center of the top of the bar graph representing the maximum value of the water sampling amount and the center of the top of the bar graph representing the minimum value, the length in the horizontal axis direction will be 4 pixels, and the maximum value of the water sampling amount. The difference between the value and the minimum value will be expressed by four pixels. When Figure 16 starts up, S
Initial conditions for 5O, S5l, and S52 are set.

Here, I is Dl, D2, D3...D8 in Figure 13C
The number indicating the position, J1 is Dl, D2, D in Fig. 13C.
3, etc., and after D8 is a number for specifying the next pixel from D1, and J2 is a number for specifying the 6th and subsequent pixels in the special memory 2 in FIG. In S53,
FIG. 6B(7) Extract data from M″1 and M″3.
M″1=30%, M″3=10%. M in S54
Take the difference between ``1'' and M''3. If we combine this with country and 3, country = 2
It is 0%. In S55, FIG. 13 C(7) Dl, D2
, D3...D8 is calculated. The constant 12 of the numerator is the 12 points in the vertical direction of one pixel, and the country is the solution in S54, and the constant 20 is the 12 points in the vertical direction of one pixel, the 2 points of the water sampling amount.
The constant is 4 when it corresponds to 0%. Denominator constant 8
is a point 8 in the horizontal direction of one pixel, and the constant 4 is a number for expressing the difference between the maximum value and the minimum value of the water sampling amount with a cursor having a length of four pixels. The first calculation in S56 is the leftmost point of the X axis Xn in FIG. 11, that is, Cf in FIG.
) is a numerical value for calculating the shining point on D1. If you use the method of connecting the center of the top of the bar graph with the cursor, the left end will be higher or lower than the center value, but S5
Calculate this value in step 6. If this value is MM, MM=3
It becomes 1.325. In S57, divide this by 20 and get S5
8, round down to 1 after the decimal point. This means that if the vertical direction of one pixel is 20%, 31.325% means that at least one 20% is required), and S5
In step 9, this value is used to select the Y-axis address. S6O,S
6l, S62 determines which of the six words constituting one pixel the MM value of 31.325% is to be assigned. S6
In O, the result of S58 is subtracted from the result of S57, multiplied by 12, and in S6l, the decimal places are rounded down. If this is further increased to 112 in S62, the result becomes 3. This means that if 12 points in the vertical direction of one pixel are taken as 20% and divided by the number of words in one pixel which is 6, the third word from the bottom, that is, W4 in FIG. 13C is used.

In S63, it is determined whether there is a remainder in the result of S62, and the first
Select pattern 1 and pattern 2 in Figure 7A. If there is no remainder, the upper row of W4 in FIG. 13C will be used, so pattern 1 is selected in which the 8 data points in the upper row are set to 1 and the 8 data points in the lower row are set to 0. In S66, the 17th
C1 to C8 in FIG. B are selected and ANDed with the pattern selected in S64 or B65. Selection of C1 to C8
The value of J1 defined in 5l or S6, which will be explained later.
Using the value of J1 defined in 8, when J1 = 1, data of C1, when J2 = 2, data of C2, ...J1 = 8
When , data of C8 is used. The data C1 is data indicating the position of Cf) D1 in FIG. 13. The AND of pattern 1 in FIG. 17A and the data in B(riC1) is as follows. That is, the data in FIG. 13C(7)W4 is determined.

In S67, S68, S69, S7, Fig. 13 CO) D
Correct the data for selecting l, D2...D8. In S7l, the result in S66 is stored in the sixth and subsequent pixels of the special memory 2.

As is clear from the above situation, the first time, the data of Cf) W4 in FIG. 13 is stored in the sixth pixel. With this operation, the Xn, YK-1 positions in Fig. 11 are changed to
It can be illuminated as shown in the example shown in FIG. 13C. When this operation is performed a predetermined number of times in S72, the cursor line is specified from the 6th position onwards in the special memory 2 in FIG.
A cursor can be displayed. Next, a specific display example is shown in FIG. Figure 18 shows the amount of water sampled as a bar graph, arranged in descending order of amount of water sampled, and distinguishing desalters in use and standby by color, shape, hunting, etc. There is. The amount of water sampled is shown in Figure 6Bf) M″1, M
``2...'' are stored in descending order of frequency, and these are used.
A bar graph 97 indicates a demineralizer in use, and a bar graph 98 indicates a demineralizer on standby. Broken lines 99, 100, and 101 are curves and sol that display the standard value, upper limit value, and lower limit value of the amount of water to be sampled, which are calculated by the following method and stored in a special memory and displayed by the method shown in FIG. According to the control method of the present invention, the regeneration work of each condensate demineralizer is distributed, but in other words, the difference in water sampling amount of each condensate demineralizer is equalized. For example, if there are four condensate demineralizers, the desalters are operated so that the difference in the amount of water sampled between the demineralizers is 25%. Now, assuming that the regeneration work takes one day and one desalination machine can be used for 30 days, the amount of water sampled by other desalination equipment will increase by 3.3% while the regeneration work is being performed. ing. That is, ±3.
A variation of 3% is possible. Furthermore, the allowable range of variation is determined by the capacity of the liquid waste treatment system that processes the recycled waste liquid. That is, it is possible to determine the standard value of the water sampling amount of each desalter and the upper and lower limits to be controlled. This calculation is performed by the main controller 50, but inputted by the input device 29, the 10th
It is stored in a special memory using the display screen creation program shown in the figure according to the method shown in FIG. 16, is created in a drawing using the method shown in FIG. 14, and is displayed as a screen by sending it to the display device 28. A portion of the screen 92 provides an operation guide and displays the electrical conductivity of the demineralizer treatment liquid on the inlet and outlet sides, the status of backwashing and regeneration work, the operating status of the demineralizer, and the like.

If the conductivity on the inlet side of the demineralizer treatment liquid rises abnormally, it may be caused by a malfunction of the condenser or sea water gets mixed in. If the conductivity at the outlet side rises abnormally, it may be caused by a break in the resin. Since this is possible, countermeasures can be taken immediately using the operation guide. In this case, data is given to the input device 29 as necessary to cause valve switching and the like to be performed. The input device 29 may be a keyboard, a light pen, etc., but the present invention is not limited by the type of input/output device. Also, the title is δ8,90 and the date and time is 89
will be displayed. The present invention has the following effects.

1. Since the resin regeneration timing of the condensate demineralizer is dispersed, the regeneration work can be carried out smoothly, and the power plant itself can be operated smoothly.

2. Since the timing to start resin regeneration can be determined, planned operations can be carried out, such as preparing the liquid waste treatment system to receive waste liquid in advance.

Even when there are changes in the output of the three power plants, changes in the conductivity of condensate, etc., the amount of water sampled can be easily integrated, and the performance of the condensate demineralizer can be accurately grasped.

4 By displaying the electrical conductivity on the inlet and outlet sides of the condensate demineralizer treated liquid, it is possible to know if there is a condenser failure, seawater contamination, resin breakage, etc., and take immediate countermeasures. can.

5. In the long term, the amount of waste liquid generated is equalized, the efficiency of using tanks and concentrators is increased, and
Solid waste generation will be evened out.

7 Modifications and Applications of Inventions and Ideas Although the present invention has been described with respect to a condensate desalination device for a nuclear power plant, it can be applied to the case where a plurality of devices that require a regeneration process are operated.

[Brief explanation of drawings]

FIG. 1 is a system diagram showing an example of a system to which the present invention is applied, FIG. 2 is a functional block diagram of the control device of the present invention, and FIG.
The figure is a calculation block diagram of the input data processing device, FIG. 4 is a characteristic diagram for explaining the present invention, FIG. 6 is an example of a storage method, FIG. 5 is a calculation block diagram of the valve switching control device, and FIG. is an operating characteristic diagram of the control device, FIG. 8 is a block diagram of each operation of the color CRT, FIG. 9 is a characteristic diagram for explaining the operation of the color CRT, and FIG. 10 is a display control diagram for creating a screen to be displayed on the CRT. 11 is a block diagram of the device; FIG. 11 is a model screen diagram for explaining the screen creation method; FIG. 12 is a memory diagram for explaining the screen creation method; FIG. 13 is a detailed diagram of pixels; 15 and 16 are flow diagrams of a program for creating a screen, FIG. 17 is a pattern diagram, and FIG. 18 is a specific display example. Explanation of symbols: 1... Nuclear reactor, 2... Turbine, 3... Condenser, 4, 5, 6...
・Condensate demineralizer, 901, 902, 903... Resin regeneration device, 10... Waste liquid collection tank, 11...
- Waste liquid treatment device, 27...control device.

Claims (1)

[Scope of Claims] 1. A plurality of demineralizers are arranged in parallel, and at least one of them is kept on standby as a standby unit, and the degree of chemical contamination of each demineralizer reaches a predetermined degree of contamination. Sometimes, in a group of demineralizers, each demineralizer is equipped with a control device that stops the demineralizer for regeneration and determines the standby time of the standby unit so that the degree of chemical contamination of each demineralizer varies. A first means for determining the degree of chemical contamination of a demineralizer, determining the magnitude relationship of the degree of chemical contamination of each demineralizer determined by the first means, and displaying the degree of chemical contamination in descending order of magnitude. a display device for displaying the degree of chemical contamination of each demineralizer in descending order of degree of chemical contamination according to the output of the second means; Operation status display device for salting equipment group. 2. Determine the upper and lower limits for one of the chemical contamination levels of the demineralizer, and determine the chemical contamination of the other demineralizers based on these upper and lower limits and the variation in chemical contamination between demineralizers. An operating state display device for a group of demineralizers according to claim 1, characterized in that it displays upper and lower limits of the degree of contamination.