KR102031108B1

KR102031108B1 - Anticorrosion system having oilleak detecting function

Info

Publication number: KR102031108B1
Application number: KR1020150166446A
Authority: KR
Inventors: 배정효; 백지국
Original assignee: 한국전기연구원
Priority date: 2015-11-26
Filing date: 2015-11-26
Publication date: 2019-10-14
Also published as: KR20170061433A

Abstract

An anticorrosion system for a plurality of metal tanks embedded in the ground, the system comprising: a plurality of first anodes embedded outside of an area in which the plurality of metal tanks are clustered; A rectifier for flowing anticorrosive current from each of the plurality of first anodes to each of the plurality of metal tanks; A leaking oil detecting sensor embedded in a lower portion of each of the plurality of metal tanks and a lower portion of a pipe of each of the plurality of metal tanks to detect leaks in the plurality of metal tanks and the pipes of the plurality of metal tanks; And a central control device controlling at least one of an output voltage and an output current of the rectifier and determining whether there is leakage according to a sensing signal of the leakage detection sensor. do.

Description

ANTICORROSION SYSTEM HAVING OILLEAK DETECTING FUNCTION}

The present invention relates to the field of corrosion protection. More specifically, the present invention relates to an anticorrosion system capable of detecting oil leakage in a metal tank.

In general, the term "corrosion" is defined as the substance reacting with its surroundings, altering the substance itself or altering its properties. This corrosion is mostly called electrochemical corrosion because it occurs due to the electrochemical reaction caused by the movement of electrons.

When such corrosion occurs in a metal structure, especially a metal tank for storing oil, or an oil pipe serving as a flow path of oil, not only economic damage due to the outflow of oil, but also various environmental problems are caused. Therefore, there is a need for anticorrosive techniques for preventing corrosion of metal structures. Currently, the electric anticorrosive method is mainly used.

The electric corrosion prevention method is a method of preventing corrosion by artificially introducing a direct current (anticorrosive current) into the metal surface through an electrolyte to cause a cathode reaction on the metal surface. Rectifiers are used to prevent corrosion of anticorrosive materials (gas pipelines, oil pipelines, water and sewage pipes, and other underground metal structures). In order to prevent corrosion of the object to be corroded, this type of rectifier provides a constant direct current through the electrolyte (soil) to lower the potential of the object to be below a certain threshold (eg -850 mV / CSE). Shed.

As mentioned above, although electrical anti-corrosion facilities have been developed and commercialized for various types of anti-corrosion materials buried in the ground, there is a risk of serious environmental pollution when oil leaks due to corrosion of oil tanks concentrated in a limited area such as gas stations. Although present, there is a lack of anticorrosive equipment and oil leakage detection equipment for the oil tank, the development of this is required.

An anticorrosive system having a leak detection function according to an exemplary embodiment of the present invention aims to prevent corrosion of a metal tank embedded in a ground.

In addition, an anti-leakage system having an oil leakage detecting function according to an embodiment of the present invention aims to accurately and easily detect oil leakage in a metal tank.

In addition, the anticorrosive system having a leak detection function according to an embodiment of the present invention aims to prevent economic and environmental damage due to corrosion of the metal tank.

An anticorrosion system according to an embodiment of the present invention,

An anticorrosion system for a plurality of metal tanks embedded in a ground, the system comprising: a plurality of first anodes embedded outside of an area in which the plurality of metal tanks are clustered; A rectifier for flowing anticorrosive current from the plurality of first anodes to each of the plurality of metal tanks; A leakage oil detecting sensor embedded in a lower portion of each of the plurality of metal tanks and a lower portion of a pipe of each of the plurality of metal tanks to detect leakage of oil in the plurality of metal tanks and the pipes of the plurality of metal tanks; And a central control unit controlling at least one of an output voltage and an output current of the rectifier and determining whether there is leakage according to a sensing signal of the leak detection sensor.

The anticorrosive system further includes a second anode embedded in an area in which the plurality of metal tanks are crowded, and the rectifier may allow anticorrosive current to flow from the second anode to each of the plurality of metal tanks. .

The second anode may include a mixed metal oxide (MMO).

The anticorrosive system further comprises a reference electrode embedded in the ground, wherein the central control unit comprises a rectifier to each of the plurality of first anodes based on the potential of each of the plurality of metal tanks measured relative to the reference electrode. At least one of the output current and the output voltage of the can be controlled.

The central control apparatus may further include a potential of a metal tank corresponding to any one of the first anodes when at least one of the output current and the output voltage of the rectifier with respect to any one of the plurality of first anodes increases. When is increased, a message indicating that the polarity connection of any one first positive electrode is incorrect may be output.

The central control apparatus may transmit a message indicating that the polarity connection of the first first polarity is wrong to the user terminal.

A recloser may be connected between each of the plurality of metal tanks and the rectifier or between the plurality of first anodes and the rectifier.

The pipe may connect an oil tanker located on the ground with each of the plurality of metal tanks.

The central control apparatus may transmit a message indicating a potential and leakage of each of the plurality of metal tanks relative to the reference electrode to the user terminal.

The central control apparatus may adjust at least one of an output voltage and an output current of the rectifier under the control of the user terminal.

According to another embodiment of the present invention,

An anticorrosive system for a plurality of metal tanks embedded in the ground, the system comprising: a plurality of first anodes embedded in an outside of an area in which the plurality of metal tanks are clustered; A rectifier for flowing anticorrosive current from the plurality of first anodes to each of the plurality of metal tanks; A reference electrode embedded in a lower portion of the plurality of metal tanks; And a central controller configured to control at least one of an output current and an output voltage of the rectifier to each of the plurality of first anodes based on the potential of each of the plurality of metal tanks measured relative to the reference electrode. The apparatus may determine that leakage of oil occurs in any one of the metal tanks when the potential of any one metal tank measured relative to the reference electrode changes by more than a predetermined value within a preset time range.

Some of the effects that can be achieved by an anti-leakage system having a leak detection function according to an embodiment of the present invention are as follows.

i) Corrosion of metal tanks buried underground can be prevented.

ii) The leakage of metal tank can be detected accurately and easily.

iii) Economic and environmental damage due to corrosion of metal tanks can be prevented.

However, the effect that can be achieved by the anti-leakage system having a leak detection function according to an embodiment of the present invention is not limited to those mentioned above, and other effects not mentioned are described in the following description. It will be clearly understood by those skilled in the art.

1 is a diagram illustrating an anticorrosion system according to an embodiment of the present invention.
FIG. 2 shows the anticorrosion system of FIG. 1 centered on the ground surface.
FIG. 3 is a diagram illustrating the central control unit shown in FIG. 2 and a user terminal connected to the central control unit.
4 is a graph showing a potential change of the metal tank according to an increase in the output current and / or the output voltage of the rectifier when the polarity connection between the first anode and the metal tank is wrong.
5 is a diagram illustrating an anticorrosion system according to another embodiment of the present invention.
6 is a graph showing a change in potential of a metal tank when leakage occurs in the metal tank.

The present invention may be variously modified and have various embodiments, and specific embodiments are illustrated in the drawings and described in detail with reference to the accompanying drawings. However, this is not intended to limit the present invention to specific embodiments, it should be understood that the present invention includes all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

In describing the present invention, when it is determined that the detailed description of the related known technology may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. In addition, the numbers (eg, first, second, etc.) used in the description process of the present specification are merely identification symbols for distinguishing one component from another component.

In addition, in the present specification, when one component is referred to as "connected" or "connected" with another component, the one component may be directly connected or directly connected to the other component, but in particular It is to be understood that, unless there is an opposite substrate, it may be connected or connected via another component in the middle.

In addition, the components represented by '~ unit (unit)', 'module', etc. in the present specification means a hardware component, such as software, FPGA or ASIC, this component plays a role. However, components are not meant to be limited to software or hardware. The component may be configured to be in an addressable storage medium. In addition, two or more components may be combined into one component, or one component may be divided into two or more for each of the more granular functions. In addition, each component to be described below may additionally perform some or all of the functions of other components in addition to the main functions of which they are responsible, and some of the main functions of each of the components may be different. Of course, it may be carried out exclusively by the component.

Hereinafter, exemplary embodiments according to the spirit of the present invention will be described with reference to the drawings.

FIG. 1 is a diagram showing a corrosion protection system according to an embodiment of the present invention, and FIG. 2 is a view showing the corrosion protection system of FIG. 1 with respect to the ground surface G. As shown in FIG. FIG. 2 is based on one metal tank 10a of the three metal tanks 10a, 10b and 10c shown in FIG. 1, and the remaining metal tanks 10b and 10c are also shown in FIG. It may have the same connection relationship as 10a). 3 is a diagram showing the central control unit 70 shown in FIG. 2 and the user terminal 90 connected to the central control unit 70.

1 and 2, an anticorrosion system according to an embodiment of the present invention includes a plurality of first anodes 20a, 20b, and 20c, a rectifier 60, a leakage oil detecting sensor 50a, 50b, and 50c. And a central control unit 70.

The corrosion protection system according to an embodiment of the present invention prevents corrosion of the plurality of metal tanks 10a, 10b, and 10c embedded in the ground below the ground surface G, and at the same time, the plurality of metal tanks 10a, 10b, 10c) each leak can be detected.

The plurality of first anodes 20a, 20b, and 20c are embedded in the ground, and as shown in FIG. 1, each of the plurality of first anodes 20a, 20b, and 20c may be a plurality of metal tanks 10a, 10b, and 10c. ) May be installed outside the region R in which the clusters are clustered. Here, the region R in which the plurality of metal tanks 10a, 10b, and 10c are clustered is provided with a plurality of first anodes 20a, 20b, and 20c and second anodes 40a, 40b, and 40c described later. As an area defined to distinguish the location, the area R may mean a closed area including all of the plurality of metal tanks 10a, 10b, and 10c. Each of the plurality of first anodes 20a, 20b, and 20c may be installed at 1: 1, 1: n (n is a natural number greater than 1) or n: 1 with respect to the plurality of metal tanks 10a, 10b, and 10c. have.

The rectifier 60 allows the anticorrosive current c to flow from the plurality of first anodes 20a, 20b, 20c to each of the plurality of metal tanks 10a, 10b, 10c. The first anodes 20a, 20b, and 20c are connected to the (+) pole of the rectifier 60, and the metal tanks 10a, 10b, and 10c are connected to the (-) pole of the rectifier 60, and the first anode The anticorrosive current c flows from the 20a, 20b, 20c to the metal tanks 10a, 10b, 10c. The metal tanks 10a, 10b, and 10c supplied with the anticorrosive current c may have a low potential to prevent corrosion.

The leak detection sensors 50a, 50b, and 50c are provided at the bottom of each of the plurality of metal tanks 10a, 10b, and 10c, and at the bottom of each of the pipes 12a, 12b, and 12c of each of the plurality of metal tanks 10a, 10b, and 10c. It is embedded in the plurality of metal tanks (10a, 10b, 10c) and detect the leakage in the pipes (12a, 12b, 12c). Piping 12a, 12b, 12c is provided in order to connect metal tank 10a, 10b, 10c and lubricator 80. FIG. The leak detection sensors 50a, 50b, and 50c may include a sensor having a cable structure in contact with oil to change its resistance value.

As shown in FIG. 2, the leak detection sensors 50a, 50b and 50c may be buried along the metal tanks 10a, 10b and 10c and the pipes 12a, 12b and 12c. Not only the oil leakage in the tanks 10a, 10b and 10c but also the oil leakage in the pipes 12a, 12b and 12c can be monitored.

The central controller 70 controls the output current and / or the output voltage of the rectifier 60 and determines whether there is leakage according to the sensing signals of the leak detection sensors 50a, 50b, and 50c. As shown in FIG. 1 and FIG. 2, the reference electrodes 30a, 30b, and 30c may be embedded in the ground, and the central control unit 70 may include the metal tanks 10a, 30b, 30c, and 30c compared with the reference electrodes 30a, 30b, and 30c. The potentials of 10b and 10c may be measured and the output current and / or output voltage of the rectifier 60 may be controlled based on the measured potential. For example, when the reference electrodes 30a, 30b, and 30c are Cu / CuSO4, the potential of the metal tanks 10a, 10b, and 10c should be less than or equal to −850 mV, so that the metal tanks 10a, 10b, and 10c are maintained. If the potential of is greater than -850 mV, the central control unit 70 can increase the output of the rectifier 60 to further reduce the potential of the metal tanks 10a, 10b, 10c.

Referring to FIG. 3, the central control apparatus 70 may be connected to the user terminal 90 through a network 75 such as the Internet, where the user terminal 90 is not only a smartphone but also a desktop PC, a notebook computer, a PDA. And various types of digital devices such as tablet PCs. The central control unit 70 transmits a message indicating the potential and leakage of each of the plurality of metal tanks 10a, 10b, and 10c to the user terminal 90 to the user terminal 90, thereby allowing the user to receive a message. Information on whether the systems of the plurality of metal tanks 10a, 10b, and 10c are normally maintained, or no oil leakage has occurred can be provided. In addition, the central control apparatus 70 may adjust the output voltage and / or output current of the rectifier 60 under the control of the user terminal 90. In the user terminal 90, an application for receiving a message from the central control apparatus 70 and transmitting a control command to the central control apparatus 70 may be installed.

The anticorrosion system according to an embodiment of the present invention may further include second anodes 40a, 40b, and 40c embedded in the region R in which the plurality of metal tanks 10a, 10b, and 10c are clustered. . The second anodes 40a, 40b, 40c are provided for the shielding area of the metal tanks 10a, 10b, 10c that are not able to receive the anticorrosive current c from the plurality of first anodes 20a, 20b, 20c. . Like the first anodes 20a, 20b, 20c, the second anodes 40a, 40b, 40c are connected to the positive pole of the rectifier 60, and correspondingly the metal tanks 10a, 10b, 10c It is connected to the negative pole of the rectifier 60. The second anodes 40a, 40b, and 40c may be made of mixed metal oxide (MMO). The first anodes 20a, 20b, and 20c may also be made of MMO.

As shown in FIG. 2, a recloser 14a, 14b between the metal tanks 10a, 10b, 10c and the rectifier 60 or between the first anodes 20a, 20b, 20c and the rectifier 60. , 14c) may be installed. Reclosers 14a, 14b, 14c prevent surges from breaking or malfunctioning through surges to rectifier 60. The reclosers 14a, 14b, 14c are trips that cut off between the metal tanks 10a, 10b, 10c and the rectifier 60 or between the first anodes 20a, 20b, 20c and the rectifier 60. Reclosing between the metal tanks 10a, 10b, 10c and the rectifier 60 or between the first anodes 20a, 20b, 20c and the rectifier 60 after the blocking operation, and the metal tanks. Surge protection can be performed while performing a permanent lockout that permanently blocks between 10a, 10b, 10c and rectifier 60 or between first anode 20a, 20b, 20c and rectifier 60. Can be.

On the other hand, the installation of the anticorrosive system is often installed by the owner who owns the anticorrosive material, but the owner who does not have knowledge of the anticorrosive system incorrectly installs the anticorrosive system. There is a risk that corrosion of) may proceed faster. For example, the metal tanks 10a, 10b, 10c should be connected to the negative pole of the rectifier 60 and the first anode 20a, 20b, 20c should be connected to the positive pole of the rectifier 60. If the owner connects the metal tanks 10a, 10b, 10c and the first anodes 20a, 20b, 20c to the contrary, the anticorrosive current is from the metal tanks 10a, 10b, 10c to the first anode 20a, 20b, 20c, the corrosion of the metal tanks 10a, 10b, 10c increases more quickly.

In order to solve this problem, the central control unit 70 may output an output current of the rectifier 60 to any one of the plurality of first anodes 20a, 20b, and 20c. And / or when the potential of the metal tanks 10a, 10b, and 10c corresponding to any one of the first anodes 20a, 20b, and 20c increases when the output voltage is increased, either one of the first anodes 20a, 20b, 20c) and the metal tanks 10a, 10b, 10c may be determined to be incorrectly connected to the rectifier 60.

4 shows a metal tank according to an increase in the output current and / or the output voltage of the rectifier 60 when the polarity connection between the first anodes 20a, 20b, and 20c and the metal tanks 10a, 10b, and 10c is incorrect. It is a graph showing the change in potential of 10a, 10b, 10c). Although the output current and / or output voltage of the rectifier 60 for either one of the first anodes 20a, 20b, 20c is increased, as shown in FIG. 4, when the potential increases from p1 to p2, the central control The device 70 determines that the polarity connection is reversed.

When the polarity connection between the first anodes 20a, 20b, and 20c and the metal tanks 10a, 10b, and 10c is incorrect, the central control unit 70 indicates that the polarity connection is incorrect through an output device such as a speaker, a printer, or a display. The message may be displayed and the message may be transmitted to the user terminal 90.

5 is a diagram illustrating an anticorrosion system according to another embodiment of the present invention.

Referring to FIG. 5, a corrosion protection system according to another exemplary embodiment of the present invention may include a plurality of metal tanks 10a, 10b, and 10c and a plurality of first anodes 20a, 20b, and 20c, as in the corrosion protection system of FIG. 2. ), A plurality of reference electrodes 30a, 30b, 30c, a plurality of second anodes 40a, 40b, 40c, a plurality of reclosers 14a, 14b, 14c, rectifier 60 and a central control unit 70 It may include. However, compared with the anticorrosive system of FIG. 2, the leak detection sensors 50a, 50b, and 50c are omitted from the anticorrosive system, and the reference electrodes 30a, 30b, and 30c are replaced by the lower portions of the metal tanks 10a, 10b, and 10c. You can see it installed in. In the method system according to another exemplary embodiment of the present invention, the reference electrodes 30a, 30b, and 30c may perform the function of leak detection instead of the leak detection sensors 50a, 50b, and 50c.

When the potential of any one of the metal tanks 10a, 10b, and 10c measured relative to the reference electrodes 30a, 30b, and 30c changes by more than a predetermined value within a preset time range, It may be determined that leakage occurs in any one of the metal tanks 10a, 10b, and 10c.

When the oil leaked from the metal tanks 10a, 10b, 10c flows in the direction of the reference electrodes 30a, 30b, 30c, the reference electrodes 30a, 30b, 30c itself and the reference electrodes 30a, 30b, 30c Due to the change in electrical characteristics of the surrounding environment, the potential measured in the metal tanks 10a, 10b, and 10c may change significantly. The central control unit 70 detects the sudden change in potential to determine whether the metal tanks 10a, 10b, and 10c leak.

FIG. 6 is a graph showing the potential change of the metal tanks 10a, 10b and 10c when leakage occurs in the metal tanks 10a, 10b and 10c. As shown in FIG. 6, when the amount of change (p4-p3) of the potential of the metal tanks 10a, 10b, and 10c exceeds the preset value during the preset time range t2-t1, the central controller 70 ) May be determined as leakage of oil in the corresponding metal tanks 10a, 10b, and 10c. Here, the preset time range and the preset value may be variously set by the administrator.

The central control apparatus 70 may output a message indicating that leakage is detected through an output device such as a speaker, a printer, or a display, and transmit the corresponding message to the user terminal 90.

According to the anticorrosion system shown in FIG. 5, since the oil leakage of the metal tanks 10a, 10b, and 10c may be detected using only the reference electrodes 30a, 30b, and 30c, the leakage oil detection sensors 50a, 50b, and 50c may be used. It can save the cost of purchase and burial.

The anticorrosive system having a leak detection function according to an embodiment of the present invention can prevent corrosion of the metal tanks 10a, 10b, and 10c embedded in the ground, and at the same time, accurately prevent leakage of the metal tanks 10a, 10b, and 10c. And easy to detect. In addition, the anticorrosion system having a leak detection function according to an embodiment of the present invention may prevent economic and environmental damage due to corrosion of the metal tanks 10a, 10b, and 10c.

Although embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may realize that the present invention may be embodied in other specific forms without changing the technical spirit or essential features thereof. I can understand. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive.

10a, 10b, 10c: metal tank
12a, 12b, 12c: piping
14a, 14b, 14c: recloser
20a, 20b, 20c: first anode
30a, 30b, 30c: reference electrode
40a, 40b, 40c: second anode
50a, 50b, 50c: leak detection sensor
60: rectifier
70: central control unit
80: lubricator
90: user terminal

Claims

A plurality of first anodes buried outside the region where the plurality of metal tanks embedded in the ground are crowded to supply anticorrosive current to the plurality of metal tanks;
A plurality of second anodes embedded in an area in which the plurality of metal tanks are crowded to supply anticorrosive current to shielded areas of the plurality of metal tanks;
A rectifier for providing said anticorrosive current from said plurality of first anodes to each of said plurality of metal tanks and from said plurality of second anodes to each of said plurality of metal tanks;
A recloser connected between each of the plurality of metal tanks and the rectifier or between the plurality of first anodes and the rectifier;
A leaking oil detection sensor embedded in a lower portion of each of the plurality of metal tanks and a lower portion of a pipe of each of the plurality of metal tanks to detect leakage of oil in the plurality of metal tanks and the pipes of the plurality of metal tanks;
A reference electrode embedded in the ground; And
A central control device for controlling at least one of the output voltage and the output current of the rectifier based on the potential of each of the plurality of metal tanks measured relative to the reference electrode, and determines whether or not leakage according to the sensing signal of the leak detection sensor Including,
The central control apparatus may further include at least one of a metal tank corresponding to any one of the first anodes when at least one of the output current and the output voltage of the rectifier with respect to any one of the plurality of first anodes increases. And if the potential is increased, outputting a message indicating that the polarity connection of any one of the first anodes is wrong.

delete

The method of claim 1,
Each of the plurality of second anodes,
An anticorrosive system comprising a mixed metal oxide (MMO).

delete

The method of claim 1,
The central control unit,
The system of claim 1, wherein the message indicating that the polarity connection of any one of the first anode is wrong is transmitted to the user terminal.

delete

The method of claim 1,
The pipe is,
Connecting each of the plurality of metal tanks with an oil tank located above the ground.

The method of claim 1,
The central control unit,
And a message indicating a potential and leakage of each of the plurality of metal tanks relative to a reference electrode is transmitted to a user terminal.

The method of claim 9,
The central control unit,
And at least one of an output voltage and an output current of the rectifier under control of the user terminal.

The method of claim 1,
The central controller determines that leakage of oil occurs in any one of the metal tanks when the potential of any one metal tank measured relative to the reference electrode changes by more than a predetermined value within a preset time range. Characteristic system.