JP2021015039A - Processing device, processing system, and production system - Google Patents

Abstract

To provide a processing device that can reduce the work load on workers.SOLUTION: A processing device includes: a detection unit 52 that detects, based on an inspection result at an inspection device 40 that inspects presence or absence of defects in a passivation film formed on an inner wall of a flow path forming member made from passivation forming metal that forms a fluid flow path, defects of the passivation film on the inner wall; a formation start determination unit 53 that determines that it is necessary to form the passivation film on the inner wall when the detection unit 52 detects the defects; and a first control unit 54 that forms the passivation film on the inner wall by driving a construction device 20 that forms the passivation film on the inner wall of the flow path forming member by flowing the passivation forming liquid through the flow path forming member when the determination unit 53 determines that it is necessary to form the passivation film.SELECTED DRAWING: Figure 4

Description

The present invention relates to processing equipment, processing systems and production systems.

For example, in a production system for beverages, pharmaceuticals, foods, etc., for example, raw material liquids, culture liquids, etc. circulate inside metal pipes. The pipe is made of a passivation-forming metal such as stainless steel, and a passivation film is formed on the inner wall of the pipe. Corrosion inside the pipe is suppressed by forming a passivation film. However, for some reason, the passivation film may be damaged and the metal inside the passivation film may be exposed. It is preferable that the generated defect is repaired because the corrosion originating from the defect is likely to occur. The defect referred to here includes, for example, cracking, scratching, rusting, peeling, melting, etc. of the passivation film.

As a technique for performing a defect inspection, the technique described in Patent Document 1 is known. In Patent Document 1, the stainless steel subject to be measured is directly defined as one pole, and the other pole made of the same material and in an activated state is impregnated with an electrolytic solution capable of dissolving the subject. The surface of the subject is brought into contact with the surface of the subject through the water-bearing paper material, and the spontaneous potential between the two poles is measured, and the degree of passivation of the subject is determined from the change in the generated potential. A simple method for measuring the passivation effect is described.

Japanese Patent Publication No. 5-23386 (see particular claim 1)

In the technique described in Patent Document 1, defect inspection is performed by installing an inspection device at a site where defect inspection is performed. Then, in the technique described in Patent Document 1, when the worker confirms a defect, the worker distributes, for example, a passivation-forming liquid (for example, nitric acid) to the inside of the pipe for repairing the defect. Therefore, every time a defect is confirmed, a worker repairs the defect, which is complicated.

An object of the present invention is to provide a processing device, a processing system and a production system capable of reducing the work load of a worker.

The processing apparatus of the present invention is based on the inspection result of the inspection apparatus for inspecting the presence or absence of a defect of the passivation film formed on the inner wall of the passivation-forming metal channel-forming member forming the fluid flow path. A detection unit that detects a defect in the passivation film on the inner wall, a formation start determination unit that determines that it is necessary to form the passivation film on the inner wall when the detection unit detects the defect, and the above-mentioned When the formation start determination unit determines that the passivation film needs to be formed, the construction apparatus for forming the passivation film on the inner wall of the passivation forming member by the flow of the passivation forming liquid to the flow path forming member. It includes a first control unit that forms the passivation film on the inner wall by driving. Other solutions will be described later in the form for carrying out the invention.

According to the present invention, it is possible to provide a processing device, a processing system and a production system capable of reducing the work load of a worker.

It is a system diagram of the production system which concerns on 1st Embodiment. It is an enlarged view of the installation part of the inspection apparatus in a reaction part. It is an enlarged view of the installation part of the inspection apparatus in a reaction part, and is the figure which shows the part different from FIG. It is a block diagram of a processing apparatus. It is a figure explaining the defect detection method based on the response value. It is a flowchart which shows the processing method which concerns on 1st Embodiment. It is a system diagram of the production system which concerns on 2nd Embodiment. It is a flowchart which shows the processing method which concerns on 2nd Embodiment.

Hereinafter, embodiments for carrying out the present invention (the present embodiment) will be described. However, the present invention is not limited to the following embodiments, and can be arbitrarily modified and implemented as long as the effects of the present invention are not significantly impaired. The present invention may be implemented by combining different embodiments. In different embodiments, the same members and step numbers are designated by the same reference numerals, and duplicate description will be omitted for simplification of description. Each of the referenced figures is schematic and does not illustrate a device configuration that exactly matches the actual device configuration.

FIG. 1 is a system diagram of the production system 100 according to the first embodiment. The production system 100 includes a production device 10, a construction device 20, an inspection device 40, and a processing device 50. Of these, the processing system (not designated) of the present embodiment includes a construction device 20, an inspection device 40, and a processing device 50. In FIG. 1, each device constituting the device group (for example, the production device 10 or the like) is surrounded by a broken line for each device group, but the devices of the device group described below also have the same broken line for convenience of illustration. It may not be surrounded by.

The production apparatus 10 produces a target fluid using the raw material fluid. For example, the raw material fluid is a liquid raw material and the target fluid is a liquid product. For example, by using water in which sugars are dissolved, a pigment solution, or the like as a liquid raw material, a beverage product such as a soft drink can be produced. Similarly, food can be produced by the production apparatus 10. Further, when a liquid medium is used as a liquid raw material and a culture solution is obtained as a liquid product, a drug can be produced from the cultured microorganism, for example, by culturing a microorganism that produces a biopharmacy.

The production apparatus 10 includes a tank 18 for storing the raw material fluid, a valve 11, a pump 12 for flowing the raw material fluid, a heat exchanger 13 for heating the raw material fluid with a heat medium (for example, steam), and a long flow path forming member. It includes a reaction unit 14 composed of 17 (see FIGS. 2 and 3; not shown in FIG. 1), a tank 15 for collecting a target fluid, and a valve 16. These are connected by a flow path forming member 17 indicated by a solid arrow in FIG.

The flow path forming member 17 forms a fluid flow path through which at least one of the raw material fluid and the target fluid flows. The flow path forming member 17 includes, for example, at least one of a pipe, a tank, or a pump. When the flow path forming member 17 is, for example, a pipe, the fluid flow path is formed inside the pipe. When the flow path forming member 17 is, for example, tanks 15 and 18, the raw material fluid flows in the tanks 15 and 18, so that a fluid flow path is formed inside the tanks 15 and 18. When the flow path forming member 17 is, for example, a pump 12, the fluid flow path is formed so that the fluid comes into contact with an impeller (not shown) constituting the pump 12. That is, the fluid flow path is formed inside the pump 12. In the following description, for simplification of the description, an example in which the flow path forming member 17 is a pipe is mainly shown.

The flow path forming member 17 is made of a passivation-forming metal, and the passivation-forming metal includes, for example, a simple substance such as aluminum, chromium, titanium, or an alloy, as well as stainless steel or the like. A passivation film 17a is formed on the inner wall 17b of the flow path forming member 17 (not shown in FIG. 1, see FIGS. 2 and 3), and corrosion of the flow path forming member 17 is suppressed.

The raw material fluid heated by the heat exchanger 13 flows through the reaction unit 14. During the flow of the reaction unit 14, the target fluid is produced by promoting the reaction inside the flow path forming member 17. The produced target fluid is collected in the tank 15 and taken out to the outside by opening the valve 16.

The production system 100 includes an inspection device 40 for inspecting the inner wall 17b of the flow path forming member 17 constituting the reaction unit 14 for a defect of the passivation film. The inspection device 40 includes a non-destructive inspection device (an example of the inspection device 40) that non-destructively inspects the presence or absence of a defect of the passivation film 17a on the inner wall 17b of the flow path forming member 17. By providing the non-destructive inspection device, it is possible to inspect whether or not the passivation film is missing on the inner wall 17b of the flow path forming member 17 without destroying the flow path forming member 17.

FIG. 2 is an enlarged view of the installation portion 14a (see also FIG. 1) of the inspection device 40 in the reaction unit 14. For example, a raw material fluid or the like flows inside a flow path forming member 17 such as a pipe, as shown by a white arrow. A passivation film 17a is formed on the inner wall 17b of the flow path forming member 17 as described above. These points are the same in FIG. 3 described later.

The inspection device 40 includes a first electrode 45 connected to the flow path forming member 17. The first electrode 45 is electrically connected to the outer periphery of the flow path forming member 17. The first electrode 45 is made of a conductive metal (which has corrosion resistance in an inspection environment). The first electrode 45 is, for example, annular, and is fixed to the outer surface of the circular tubular flow path forming member 17, for example, by welding or the like. The inner wall 17b of the first electrode 45 is formed on the flow path forming member 17 so that the inner wall 17b of the circular tubular first electrode 45 and the inner wall 17b of the circular tubular first electrode 45 are flush with each other. A part may be configured.

The first electrode 45 is connected to the power supply device 41 (not shown in FIG. 2, see FIG. 1) through the electric signal line indicated by the broken line arrow in FIG. The power supply device 41 will be described later with reference to FIG.

FIG. 3 is an enlarged view of the installation portion 14b (see also FIG. 1) of the inspection device 40 in the reaction unit 14, and is a diagram showing a portion different from FIG. The inspection device 40 includes a second electrode 46. The second electrode 46 is arranged so as to be in contact with the conductive defect inspection liquid (described later) flowing through the fluid flow path formed by the flow path forming member 17 and to be insulated from the flow path forming member 17. Is. The second electrode 46 is arranged inside the flow path forming member 17 which is expanded by projecting outward. As a result, it is possible to suppress an excessive increase in distribution resistance during distribution of the raw material fluid or the like inside the flow path forming member 17.

The second electrode 46 is fixed to the inner wall 17b of the flow path forming member 17 via an insulator 44 such as rubber. The second electrode 46 is made of a conductive metal (for example, copper) and has a flat plate shape, for example. The second electrode 46 is connected to the measuring device 42 (not shown in FIG. 2, see FIG. 1) through the electric signal line indicated by the broken line arrow in FIG. The measuring device 42 will be described later with reference to FIG.

Returning to FIG. 1, the inspection device 40 inspects the presence or absence of the passivation film 17a on the inner wall 17b of the flow path forming member 17 constituting the reaction unit 14 as described above. The inspection device 40 includes a power supply device 41 and a measuring device 42 in addition to the above-mentioned first electrode 45 and second electrode 46.

The power supply device 41 either applies a pulse voltage or energizes a pulse current between the first electrode 45 and the second electrode 46. The power supply device 41 is connected to the first electrode 45 and the second electrode 46 by an electric signal line shown by a broken line. The drive control of the power supply device 41 is performed by the processing device 50 (described later) connected via an electric signal line or the like.

The pulse voltage to be applied is, for example, 2 V at the maximum. The maximum energized pulse current is, for example, 1 A. The pulse voltage or pulse current can be gradually increased, for example, for each pulse. The application time of the pulse voltage or the energization time (pulse width) of the pulse current is preferably a time during which the capacitance of the passivation film 17a (see FIGS. 2 and 3) is sufficiently charged, for example, 10 mm. It is not less than 50 milliseconds. The interval between the pulses is preferably a time during which the capacitance of the passivation film 17a (see FIGS. 2 and 3) is sufficiently discharged, and is, for example, 1 second or more and 10 seconds or less.

The measuring device 42 measures the response value of either the response current generated by the application of the pulse voltage by the power supply device 41 or the response voltage generated by the energization of the pulse current. The measuring device 42 is installed at a position where either the current flowing between the first electrode 45 and the second electrode 46 or the voltage generated between the first electrode 45 and the second electrode 46 can be measured. .. The measuring device 42 includes, for example, a voltmeter or an ammeter. The measured value by the measuring device 42 is transmitted to the processing device 50 (described later) connected via an electric signal line or the like.

The defect inspection of the passivation film 17a by the inspection device 40 is performed using the equipment of the construction device 20 described later. Therefore, for convenience of explanation, the configuration of the construction device 20 will be described first, and then the method of defect inspection by the inspection device 40 will be described.

The construction device 20 forms a passivation film 17a on the inner wall 17b of the flow path forming member 17 by flowing the passivation forming liquid through the flow path forming member 17. The construction device 20 includes valves 25 and 21, tanks 22 and 23, and a pump 24. The tank 23 is supplied with a stock solution of the passivation forming liquid used when forming the passivation film 17a on the inner wall 17b of the flow path forming member 17. Although details will be described later, the stock solution of the defect test solution used at the time of the passivation film 17a defect test is also supplied to the tank 23 separately from the stock solution of the passivation forming solution. Water for adjusting the concentration (for example, clean water) is further supplied to the tank 23. The irrigation water supplied to the tank 23 is also used as irrigation water for internal replacement of the flow path forming member 17.

In the tank 23, the stock solution of the supplied passivation-forming solution is diluted with water. As a result, a passivation forming liquid for forming the passivation film 17a on the inner wall 17b of the flow path forming member 17 is generated. The tank 23 is provided with a conductivity meter (not shown), and the dilution rate with water (that is, the concentration of the passivation-forming liquid to be produced) is controlled by the measured value of the conductivity meter.

The passivation-forming solution is arbitrary as long as it is a solution capable of forming the passivation film 17a, and includes, for example, nitric acid, sulfuric acid, citric acid aqueous solution, ascorbic acid aqueous solution and the like. The passivation-forming liquid may contain, for example, an electrolyte (for example, boric acid) that improves conductivity.

A method of forming the passivation film 17a by the construction apparatus 20 will be described. After closing the valves 11, 16 and 21 of the production apparatus 10, the tank 23 is supplied with the stock solution of the passivation-forming liquid and the water for adjusting the concentration. As a result, a passivation-forming liquid is generated in the tank 23. Next, the passivation-forming liquid flows inside the flow path forming member 17 (including the heat exchanger 13 and the tank 15) by opening the valve 25 and driving the pumps 12 and 24. The passivation-forming liquid circulates until the stopping condition (described later) is satisfied, whereby the passivation film 17a is formed on the inner wall 17b of the flow path forming member 17. After the formation of the passivation film 17a, the passivation-forming liquid remaining in the flow path forming member 17 is transferred to the tank 22 through the valve 21 and discarded.

Next, a method of defect inspection by the inspection device 40 will be described. Similar to the time of passivation formation, the tank 23 is supplied with the stock solution of the defect test solution and the water for adjusting the concentration. As a result, a defect test solution is generated in the tank 23. The defect test liquid (and its stock solution) is arbitrary as long as it is a conductive liquid, and is, for example, artificially prepared seawater or the like. The defect test solution may have the same composition as the conductive passivation forming solution as long as the passivation forming solution has conductivity. In addition, when the raw material fluid and the target fluid have conductivity, they can be inspected during the production of the target fluid. Further, also in the step of forming the passivation film 17a by the flow of the passivation forming liquid, the base value is adjusted by measuring the flow path forming member 17 filled with the passivation forming liquid in advance with the inspection device 40. , Can also be inspected.

The defect inspection liquid circulates inside the flow path forming member 17 by driving the pumps 12 and 24. After the defect inspection liquid is sufficiently filled inside the flow path forming member 17, the defect inspection liquid is sealed inside the flow path forming member 17 by stopping the pumps 12 and 24 and closing the valve 25.

Next, as described in the device configuration of the inspection device 40, the power supply device 41 either applies a pulse voltage or energizes a pulse current between the first electrode 45 and the second electrode 46. Then, the measuring device 42 measures the response value of either the response current generated by the application of the pulse voltage by the power supply device 41 or the response voltage generated by the energization of the pulse current. The measured response value is input to the processing device 50, and the processing device 50 determines the presence or absence of a defect in the passivation film 17a based on the input response value, and detects the defect.

The processing device 50 detects the defect of the passivation film 17a and constructs the passivation film 17a at the time of detecting the defect. The processing device 50 is connected to the inspection device 40 via the central control monitoring device 50a and the Internet 50b. Although not shown, the processing device 50 is also connected to the construction device 20. The processing device 50 is installed in a remote place, for example. The processing device 50 will be described with reference to FIG.

FIG. 4 is a block diagram of the processing device 50. In FIG. 4, the central control monitoring device 50a and the Internet 50b are not shown for simplification of the illustration. The processing device 50 includes an inspection start unit 51, a detection unit 52, a formation start determination unit 53, a first control unit 54, a formation stop determination unit 55, and a second control unit 56.

The inspection start unit 51 instructs the start of the defect inspection on the passivation film 17a of the flow path forming member 17 after the production of the target fluid (for example, a beverage) in the production system 100 is completed. Specifically, the inspection start unit 51 instructs the start of the defect inspection by starting the operation of the inspection device 40 and the construction device 20 using the defect inspection liquid. The inspection start unit 51 starts the defect inspection, for example, by pressing the operation start button (not shown) by the user, detecting the end of production of the target fluid by the production apparatus 10, and the like.

The detection unit 52 detects the defect of the passivation film 17a on the inner wall 17b of the flow path forming member 17 based on the inspection result by the inspection device 40. The detection unit 52 includes a slope calculation unit 52a, a first defect determination unit 52b, a coefficient of determination calculation unit 52c, and a second defect determination unit 52d.

The slope calculation unit 52a calculates the slope of an approximate straight line for plotting the response value to the pulse voltage or pulse current measured by the measuring device 42. The first defect determination unit 52b compares the inclination calculated by the inclination calculation unit 52a with the reference value indicating that the potential of the passivation film 17a exists in the passivation region, and determines whether or not the passivation film 17a is defective. Is to be determined. By providing the inclination calculation unit 52a and the first defect determination unit 52b, the inclination that fluctuates due to the presence of the defect can be compared with the reference value, and the presence or absence of the defect can be determined. A specific determination method will be described with reference to FIG.

FIG. 5 is a diagram illustrating a defect detection method based on the response value. FIG. 5 shows, as an example, a case where the response current is measured by applying a pulse voltage. The horizontal axis represents the applied pulse voltage value, and the vertical axis represents the response charge calculated from the response value (response current). Shown. 5 shows, as an example, the approximate straight line L1 (the coefficient of determination ^{(R 2} value) ≧ third reference value A3) of black plots the approximate straight line L2 (the coefficient of determination white plot ^{(R 2} value) <Third Two approximate straight lines with the reference value A3) are shown. The inclination calculation unit 52a calculates the inclination of the approximate straight lines L1 and L2.

The slope calculated by the slope calculation unit 52a is compared with the reference value as described above. The reference values are the first reference value A1 in which the thickness of the passivation film 17a is determined to be equal to or less than the predetermined thickness when the inclination is lower, and the passivation film 17a is corroded when the inclination is higher. Includes the second reference value A2 determined to be.

Of these, the "predetermined thickness" in the first reference value A1 is, for example, a thickness that is excessively thinner (thinner) than the normal thickness of the passivation film 17a. Specifically, for example, the thickness has a great influence on the corrosion resistance of the flow path forming member 17, and is, for example, 2 nm or less. Since the thickness of the passivation film 17a is excessively thinner than usual, it can be determined that the passivation film 17a is defective. If the thickness of the passivation film is less than or equal to a predetermined thickness, that is, if it is too thin, the capacitance of the passivation film 17a is too small to be sufficiently charged. Therefore, the current value measured by the measuring device 42 becomes small, and the slope of the graph shown in FIG. 5 becomes small. Therefore, the first reference value A1 is set based on the behavior of the response value based on this phenomenon.

On the other hand, with respect to the second reference value A2, the thickness of the passivation film 17a is a thickness that does not significantly affect the corrosion resistance (for example, 2 nm or more, preferably 5 nm or more). However, corrosion of the passivation film 17a may occur. Due to the occurrence of corrosion, rust such as rouge is generated on the passivation film 17a, and defects have already begun to occur on the passivation film 17a. Therefore, the defect can be detected by detecting the occurrence of corrosion. A corrosion current is detected due to the occurrence of corrosion of the passivation film 17a. Therefore, the current value measured by the measuring device 42 becomes large, and the slope of the graph shown in FIG. 5 becomes large. Therefore, the second reference value A2 is set based on the behavior of the response value based on this phenomenon.

In the example shown in FIG. 5, the slope is equal to or greater than the first reference value A1 and equal to or less than the second reference value A2 in any of the approximate straight lines L1 and L2. Therefore, in the first defect determination unit 52b, the thickness of the passivation film 17a is sufficient in both the black plot corresponding to the approximate straight line L1 and the white plot corresponding to the approximate straight line L2, and corrosion also occurs. It is determined that there is no defect.

By including the first reference value A1 and the second reference value A2, it is possible to detect defects caused by excessive thinning of the passivation film 17a and occurrence of corrosion. The first reference value A1 and the second reference value A2 can be determined during the trial run after the production system 100 is installed and before the normal operation. Further, the first reference value A1 and the second reference value A2 can also be determined by an experiment in a small facility imitating the production system 100.

Here, the thickness of the passivation film 17a is usually substantially the same (or the same; the same applies hereinafter) in the flow direction of the defect test liquid in the flow path forming member 17. However, there is a high possibility that defects will actually occur or that defects will occur in the future, although the inclination exceeds the first reference value A1, such as when there is a locally thin portion or when the surface of the passivation film 17a is rough. It may happen. In order to improve the detection accuracy of the defect, based on the determined coefficient of the approximate straight line (R ² values), the following determination is made.

The detection unit 52 shown in FIG. 4 further includes a coefficient of determination calculation unit 52c and a second defect determination unit 52d. The coefficient of determination calculation unit 52c calculates the coefficient of determination of the approximate straight line shown in FIG. The second defect determination unit 52d determines whether or not the passivation film 17a is defective by comparing the coefficient of determination calculated by the coefficient of determination calculation unit 52c with the third reference value A3, which indicates the degree of disturbance of the response value. It is a thing. By providing the coefficient of determination calculation unit 52c and the second defect determination unit 52d, it is possible to detect the variation in the response value due to the occurrence of the defect or the high possibility of the occurrence of the defect, and detect the defect.

The third reference value A3 can be determined during the trial run after the production system 100 is installed and before the normal operation. Further, the third reference value A3 can also be determined by an experiment in a small facility imitating the production system 100.

In the example shown in FIG. 5, as described above, the slope is equal to or greater than the first reference value A1 and equal to or less than the second reference value A2 in any of the approximate straight lines L1 and L2. Therefore, the first defect determination unit 52b determines that there is no defect in any of the above. The coefficient of determination of the approximate straight line L1 (R ² value) is at the third reference value A3 above, variations in the plots corresponding to approximate straight line L1 can be said to be small. However, the coefficient of determination (R ² value) of the approximated straight line L2 is less than the third reference value A3, it can be said that variations in the plots corresponding to approximate straight line L2 is large. Therefore, the second defect determination unit 52d determines that the defect has occurred or the possibility of the defect is high in the passivation film 17a for which the plot corresponding to the approximate straight line L2 has been acquired, and the defect is detected.

Returning to FIG. 4, the formation start determination unit 53 needs to form the passivation film 17a on the inner wall 17b of the flow path forming member 17 when the detection unit 52 detects a defect in the passivation film 17a. It is a judgment. When the formation start determination unit 53 determines that the formation of the passivation film 17a is necessary, the first control unit 54 drives the construction device 20 (see FIG. 1) to prevent the flow path forming member 17 from forming the inner wall 17b. The dynamic film 17a is formed. By providing the formation start determination unit 53, the first control unit 54, and the detection unit 52 described above, the defect can be automatically repaired when the defect of the passivation film 17a is detected. As a result, the work load of the worker associated with the repair work of the defect can be reduced.

Further, the processing device 50 further includes a formation stop determination unit 55 and a second control unit 56.

The formation stop determination unit 55 determines that the flow of the passivation forming liquid is stopped when the condition for stopping the flow of the passivation forming liquid is satisfied after the flow of the passivation forming liquid is started by the construction apparatus 20. The distribution suspension condition referred to here includes the first distribution suspension condition when a predetermined time has elapsed from the start of distribution of the passivation-forming liquid. By including the first distribution suspension condition, the distribution of the passivation-forming liquid can be suspended based on a simple index of the elapsed time from the start of distribution. The predetermined time here cannot be unequivocally determined because it differs depending on the length of the flow path forming member 17, but for example, the passivation forming liquid comes into contact with the inner wall 17b on which the passivation film 17a is to be formed. It can be about 1 hour after that.

Further, in another embodiment, the passivation-forming liquid has conductivity, and the flow stop condition is detected during the inspection for the presence or absence of defects in the passivation film 17a by the inspection device 40 during the flow of the passivation-forming liquid. The second distribution suspension condition is included when the defect is no longer detected by the part 52. In this case, since the passivation-forming liquid has conductivity, defect detection using the passivation liquid-forming liquid is performed in the same manner as in the case of circulating the conductive defect inspection liquid. Therefore, the defect inspection by the inspection device 40 can be performed at the same time during the formation of the passivation film 17a by the construction device 20.

By including the second distribution suspension condition, the distribution of the passivation forming liquid can be stopped after confirming the absence (that is, repair) of the defect, so that the reliability of construction by the construction apparatus 20 can be improved. The formation of the passivation film 17a and the defect inspection may be performed while circulating the passivation forming liquid that also serves as the defect inspection liquid, and the passivation forming liquid that also serves as the defect inspection liquid is sealed in the flow path forming member 17. You may go by.

The second control unit 56 is constructed so as to stop the flow of the passivation forming liquid to the fluid flow path formed by the flow path forming member 17 when the formation stop determination unit 55 determines that the flow of the passivation forming liquid is stopped. It controls the device 20. By providing the second control unit 56 and the above-mentioned formation stop determination unit 55, the passivation formation can be automatically stopped when the distribution stop condition is satisfied.

After the flow of the passivation-forming liquid is stopped, the defect inspection using the inspection device 40 can be performed again. From this, it can be confirmed that the passivation film 17a is formed (that is, no defect occurs) on the inner wall 17b of the flow path forming member 17. If the defect still occurs, the passivation film 17a can be formed again by the construction apparatus 20 in the same manner as described above.

Although not shown, the processing device 50 includes a CPU, a ROM, a RAM, and an I / F. Then, the processing device 50 is embodied by executing the program recorded in the ROM by the CPU. Similarly, the central control monitoring device 50a also includes a CPU, a ROM, a RAM, and an I / F, although none of them are shown. Then, the central control monitoring device 50a is realized by executing the program recorded in the ROM by the CPU.

FIG. 6 is a flowchart showing a processing method according to the first embodiment. The flowchart shown in FIG. 6 is executed by the processing device 50 shown in FIG. 4 in the production system 100 shown in FIG. Therefore, FIG. 6 will be described below with reference to FIGS. 1, 4 and the like as appropriate.

In the production system 100, for example, the production of beverages and the like is completed. After that, the inspection start unit 51 fills the flow path forming member 17 with the defect inspection liquid via the construction device 20 as described above (step S1). Then, the inspection start unit 51 controls the drive of the power supply device 41, and the measuring device 42 measures the response value. The measured response value is input to the slope calculation unit 52a and the coefficient of determination calculation unit 52c. The inclination calculated by the inclination calculation unit 52a is input to the first defect determination unit 52b. Further, the coefficient of determination calculated by the coefficient of determination calculation unit 52c is input to the second defect determination unit 52d.

The first defect determination unit 52b and the second defect determination unit 52d each determine the presence or absence of a defect in the passivation film 17a (step S2). If no defect is detected as a result of determining the presence or absence of a defect (No), the inside of the flow path forming member 17 is replaced with water, and the control ends. On the other hand, if a defect is detected (Yes), the formation start determination unit 53 starts the distribution of the passivation forming liquid to the flow path forming member 17 by the drive control of the construction device 20 through the first control unit 54. (Step S3). At the same time, the formation start determination unit 53 transmits the distribution start of the passivation forming liquid to the formation stop determination unit 55.

The formation stop determination unit 55 determines whether or not the distribution stop condition is satisfied (step S4). The determination can be made, for example, every 5 minutes and is repeated until the distribution suspension condition is satisfied (No). When the flow stop condition is satisfied (Yes), the formation stop determination unit 55 stops the flow of the passivation forming liquid to the flow path forming member 17 by the drive control of the construction device 20 through the second control unit 56. (Step S5).

Next, the inspection start unit 51 fills the defect inspection liquid, and the detection unit 52 determines the presence or absence of the defect again (steps S6 and S7). If no defect is detected (No), the flow path forming member 17 The inside is replaced with irrigation water, and control ends. On the other hand, if a defect is detected (Yes), the above steps S3 and subsequent steps are repeated again.

According to the treatment method of the present embodiment, the defect can be automatically repaired when the defect of the passivation film 17a is detected. As a result, the work load of the worker associated with the repair work of the defect can be reduced.

In the above example, a defect inspection was performed after the production of the target fluid was completed. However, when at least one of the raw material fluid and the target fluid is conductive and the passivation film 17a of the flow path forming member 17 through which the conductive fluid flows is inspected for defects, for example, the defect inspection is performed during the production of the target fluid. Can also be done. By inspecting the passivation film 17a for defects during the production of the target fluid, it is possible to suppress a decrease in profit due to the shutdown of the production apparatus 10.

FIG. 7 is a system diagram of the production system 200 according to the second embodiment. The production system 200 includes, in addition to the device of the production system 100 described above, a cleaning device 60 that performs clean-in-place cleaning (CIP cleaning) of the flow path forming member 17. In the illustrated example, the device configuration of the cleaning device 60 also serves as the device configuration of the construction device 20 except that the stock solution used is different.

The production system 200 includes a cleaning device 60 that cleans the inner wall 17b of the flow path forming member 17 by flowing a conductive cleaning liquid through the fluid flow path formed by the flow path forming member 17. Further, although not shown, the processing device 50 includes a cleaning execution unit that performs CIP cleaning of the flow path forming member 17 by driving the cleaning device 60.

The flow path forming member 17 can be washed by the same method as that for forming the passivation film 17a, except that a cleaning liquid is used instead of the passivation forming liquid. The conductive cleaning liquid is not particularly limited, but is, for example, a strong alkali (sodium hydroxide aqueous solution or the like) to which an electrolyte is added as necessary. However, by using a strong acid (for example, nitric acid) to which conductivity is imparted by adding an electrolyte, it is possible to combine all of the passivation forming solution, the defect test solution, and the cleaning solution.

The cleaning liquid is supplied to the tank 23 at the time of cleaning as a stock solution of the cleaning liquid. The stock solution of the supplied cleaning liquid is diluted with irrigation water, and the cleaning liquid is generated in the tank 23. The cleaning liquid is sealed inside the flow path forming member 17 by driving the pumps 12 and 24.

FIG. 8 is a flowchart showing a processing method according to the second embodiment. The flowchart shown in FIG. 8 is executed in the production system 200 shown in FIG. 7 by the processing device 50 (provided that the cleaning execution unit is not shown) shown in FIG.

In the production system 200, for example, the production of beverages and the like ends. After that, the cleaning execution unit performs CIP cleaning of the flow path forming member 17 (step S8). Specifically, the cleaning execution unit (not shown, provided in the above-mentioned processing device 50) generates a conductive cleaning liquid in the tank 23 by supplying the cleaning liquid stock solution and the irrigation water to the tank 23. The cleaning execution unit encloses the cleaning liquid inside the flow path forming member 17 by driving the pumps 12 and 24 and the like. As a result, the dirt adhering to the inner wall 17b of the flow path forming member 17 is peeled off and transferred to the cleaning liquid.

Here, the cleaning liquid has conductivity as described above. Therefore, in the production system 200, the conductive cleaning liquid also serves as the conductive defect inspection liquid described in the production system 100. Therefore, during cleaning by the cleaning execution unit, the inspection start unit 51 starts a defect inspection of the passivation film 17a by driving the inspection device 40. Then, the detection unit 52 detects the defect of the passivation film 17a on the inner wall 17b of the flow path forming member 17 during cleaning with the cleaning liquid (step S2).

If a defect is detected (Yes), it is determined whether or not to finish the cleaning (step S9). The index for determining the end of cleaning is, for example, the elapse of a predetermined time after the cleaning liquid is sealed in the entire area of the flow path forming member 17. Step S9 is repeated until the cleaning end determination is made (No. For example, before the elapse of a predetermined time). On the other hand, if it is determined that the cleaning is completed (Yes), the cleaning execution unit flows the enclosed cleaning liquid as waste liquid into the tank 22. Then, in the same manner as in the production system 100 described above, the formation of the passivation film 17a and the re-examination of defects are performed (steps S3 to S7).

If no defect is detected in step S2 (No), it is determined whether or not the cleaning is completed in the same manner as in step S9 (step S10). According to the determination of the end of cleaning (Yes), the cleaning execution unit flows the enclosed cleaning liquid as waste liquid into the tank 22. Next, the inside of the flow path forming member 17 is replaced with water.

According to the above production system 200, the defect inspection of the passivation film 17a can be performed during the cleaning of the flow path forming member 17. As a result, the maintenance time, which is the time other than the production time in the production system 200, can be shortened.

10 Production equipment 100 Production system 11 Valve 12 Pump 13 Heat exchanger 14 Reaction part 14a Installation part 14b Installation part 15 Tank 16 Valve 17 Flow path forming member 17a Immobility coating 17b Inner wall 18 Tank 20 Construction equipment 200 Production system 21 Valve 22 Tank 23 Tank 24 Pump 25 Valve 40 Inspection device 41 Power supply device 42 Measuring device 44 Insulator 45 First electrode 46 Second electrode 50 Processing device 50a Central control monitoring device 50b Internet 51 Inspection start unit 52 Detection unit 52a Tilt calculation unit 52b First Defect determination unit 52c Determination coefficient calculation unit 52d Second defect determination unit 53 Formation start determination unit 54 First control unit 55 Formation stop determination unit 56 Second control unit 60 Cleaning device A1 First reference value A2 Second reference value A3 Third Standard value

Claims (13)

Passivation formation that forms a fluid flow path The passivation film on the inner wall is based on the inspection results of an inspection device that inspects the presence or absence of defects in the passivation film formed on the inner wall of the metal flow path forming member. Detection unit that detects the defect of
When the defect is detected by the detection unit, the formation start determination unit that determines that the formation of the passivation film on the inner wall is necessary, and
A construction device that forms a passivation film on the inner wall of the flow path forming member by flowing the passivation forming liquid to the flow path forming member when the formation start determination unit determines that the passivation film needs to be formed. A processing device including a first control unit for forming the passivation film on the inner wall. After the start of the flow of the passivation-forming liquid, the formation stop determination unit that determines that the flow of the passivation-forming liquid is stopped when the conditions for stopping the flow of the passivation-forming liquid are satisfied,
When the formation stop determination unit determines that the flow of the passivation forming liquid is stopped, the construction device is controlled so as to stop the flow of the passivation forming liquid to the fluid flow path formed by the flow path forming member. The processing apparatus according to claim 1, further comprising a second control unit. The processing apparatus according to claim 2, wherein the distribution suspension condition includes a first distribution suspension condition when a predetermined time has elapsed from the start of distribution of the passivation-forming liquid. The passivation-forming liquid has conductivity and
The claim including the second distribution suspension condition, which is a time when the defect is no longer detected by the detection unit during the inspection for the presence or absence of the defect by the inspection device during the flow of the passivation forming liquid. The processing apparatus according to 2 or 3. Passivation forming that forms a fluid flow path A construction device that forms a passivation film on the inner wall of the flow path forming member by flowing a passivation forming liquid through a metal flow path forming member.
An inspection device that inspects the inner wall for defects of the passivation film, and
Equipped with a processing device,
The processing device
A detection unit that detects a defect in the passivation film on the inner wall based on the inspection result of the inspection device, and a detection unit.
When the defect is detected by the detection unit, the formation start determination unit that determines that the formation of the passivation film on the inner wall is necessary, and
A processing system including a first control unit that forms the passivation film on the inner wall by driving the construction apparatus when the formation start determination unit determines that the formation of the passivation film is necessary. The processing system according to claim 5, wherein the inspection device includes a non-destructive inspection device that non-destructively inspects the presence or absence of defects in the passivation film on the inner wall. The inspection device
The first electrode connected to the flow path forming member and
A second electrode formed of the flow path forming member, which is in contact with the conductive defect inspection liquid flowing through the fluid flow path and is arranged so as to be insulated from the flow path forming member.
A power supply device that either applies a pulse voltage or energizes a pulse current between the first electrode and the second electrode.
The processing system according to claim 5 or 6, further comprising a measuring device for measuring a response value of either a response current generated by applying the pulse voltage or a response voltage generated by energization of the pulse current. The detection unit
A slope calculation unit that calculates the slope of an approximate straight line for plotting the response value to the pulse voltage or the pulse current,
The first defect determination unit for determining the presence or absence of a defect in the passivation film by comparing the inclination calculated by the inclination calculation unit with a reference value indicating that the potential of the passivation film exists in the passivation region. The processing system according to claim 7, further comprising. The reference value is
A first reference value in which the thickness of the passivation film is determined to be equal to or less than a predetermined thickness when the inclination falls below
The processing system according to claim 8, further comprising a second reference value for determining that the passivation film is corroded when the inclination is exceeded. The detection unit
The coefficient of determination calculation unit that calculates the coefficient of determination of the approximate straight line and
By comparing the coefficient of determination calculated by the coefficient of determination calculation unit with the third reference value indicating the degree of disturbance of the response value, the second defect determination unit for determining the presence or absence of the defect of the passivation film is used. The processing system according to claim 8 or 9. The processing system according to any one of claims 5 to 10, wherein the flow path forming member includes at least one of a pipe, a tank, and a pump. A production device that produces the target fluid using the raw material fluid,
Passivation forming on the inner wall of the flow path forming member by the flow of the passivation forming liquid to the flow path forming member made of a passivation forming metal forming a flow path through which at least one of the raw material fluid or the target fluid flows. Construction equipment that forms a film and
An inspection device that inspects the inner wall for defects of the passivation film, and
Equipped with a processing device,
The processing device
A detection unit that detects a defect in the passivation film on the inner wall based on the inspection result of the inspection device, and a detection unit.
When the defect is detected by the detection unit, the formation start determination unit that determines that the formation of the passivation film on the inner wall is necessary, and
A production system including a first control unit that forms the passivation film on the inner wall by driving the construction apparatus when the formation start determination unit determines that the formation of the passivation film is necessary. A cleaning device for cleaning the inner wall by flowing a conductive cleaning liquid through the fluid flow path formed by the flow path forming member is provided.
The production system according to claim 12, wherein the detection unit detects a defect of the passivation film on the inner wall during cleaning with the cleaning liquid.

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