JP4724100B2 - Leakage detection support device - Google Patents

Description

  The present invention relates to a leak detection support apparatus suitable for detecting a leak of a solution in a chemical plant or the like.

In a chemical plant or the like, a leak detection system that detects a leak of a solution is used.
Conventional leak detection systems detect leaks by installing dedicated sensors for detecting leaks in transfer devices such as pumps and valves. However, in such leak detection systems, the number of sensors for detecting leaks is small. Since it tends to increase, when the number of sensors is reduced, it takes time to determine what solution leaked from which equipment in the plant components, and when the amount of leakage is small, the sensor operates. Thus, there is a problem that leakage cannot be detected (Patent Document 1).

The leak detection by the conventional process monitoring apparatus will be described with reference to the block diagram of FIG.
As shown in FIG. 7, the conventional process monitoring apparatus 10 comprises a process input means 1, an alarm determination means 2, an alarm display means 3, a screen display means 4, and a display device 5, and a leak detection sensor (not shown). The detected value is input to the alarm determination means 2 via the process input means 1, and it is determined whether or not there is an alarm by the alarm determination means 2, and if it is an alarm state, alarm data is created by the alarm display means 3 and displayed on the screen. An alarm was displayed on the display device 5 by means 4.

Usually, the leak detection sensor that inputs a detection value to the process input means is often installed for each transfer device or for each of a plurality of transfer devices, and the number of the leak detection sensors increases. Therefore, there is a need for a leak detection support device that can identify a leak system or leak device in a short time with a few leak detection sensors. Also, with regard to measures after leak occurrence, the number of transfer devices increases as the plant becomes larger. Since the system tends to increase and the system becomes more complicated, there has been a demand for a leak detection support apparatus that can quickly perform a leak stop operation, minimize the influence of the leak, and shorten the leak recovery time.
Japanese Patent Laid-Open No. 3-148031

  As described above, according to the conventional leakage detection method, it is necessary to provide a leakage detection sensor for each device in order to detect leakage and identify the leakage device, but this causes a problem that installation space and cost increase. . Further, depending on the installation status of the leak detection sensor, there is a problem that it takes time to specify the leak system or the leak device.

  Leakage detection sensor operation information is generally provided as an alarm for leak detection. When a leak detection sensor is activated and leak detection sensors are installed for multiple devices, leaks are possible. If the operator can check the operation status of the equipment on the system operation screen, etc., and confirm the site, the information that identifies the system and equipment that has the potential to leak However, there was a problem that it took time to collect and judge information.

  In addition, when the leak detection sensor is activated, it may be necessary to perform a leak stop operation, including the upstream system stop operation, but it takes time to check the leak stop procedure and stop the leak. In order to calculate the amount of solution retained in the leaked system, it is necessary to collect information such as the amount of solution transferred, the remaining amount to the device, and the shape of the device. There was also a problem that it took time.

  In addition, when the leak detection sensor is activated, for example, it is difficult to collect the leaked liquid without any treatment, and when neutralization is required, the liquidity / volume of the processing solution required for neutralization, It is necessary to collect a lot of information for processing solution information such as supply tanks and transfer equipment, and for collection procedures for collecting leaked liquids and confirmation of recovery tanks, transfer equipment, and transfer capabilities. It took a long time to judge, and there was a problem that it took time to collect the leaked liquid.

  The present invention has been made to solve the above problems, and the problem is that a leak detection support that can detect leaks and specify leaks with a small number of leak detection sensors, and can identify leak systems or leak devices in a short time. To provide an apparatus.

  In order to achieve the above object, the present invention specifies a solution transfer system from the process information of the plant of the solution transfer system, installs a leak detection sensor for each of a plurality of blocks, and determines a detection value of the leak detection sensor. A leak detection support device that inputs an alarm determination means to determine whether or not an alarm is present and displays an alarm on a display device if an alarm state is present, wherein a leak detection signal from the leak detection sensor and the leak detection sensor are Transfer judging means for comparing and judging the detected temperature, material characteristics, the process information and the transfer system, a transfer system in which leakage may occur by the transfer judging means, and a transfer device and a leak under the transfer system A leakage detection determination unit having leakage device specifying means for specifying liquid is provided.

  According to the present invention, it is possible to detect a leak and specify a device with a small number of leak detection sensors. Therefore, it is possible to specify a leak system or a leaked device in a short time. Also, the installation space and cost can be reduced by the amount of leak detection sensors.

The best mode for carrying out the present invention will be described below with reference to the drawings.
FIG. 1 is a block diagram of a leak detection support apparatus according to the first embodiment of the present invention.
The leak detection support device 20 of the present embodiment is different from the conventional process monitoring device of FIG. 7 in that a leak determination unit D10 having transfer information F1, device information F2, transfer determination means D1, and leak device identification means D2 is added. Since the other configuration is the same as that of the conventional process monitoring apparatus of FIG. 7, the same components are described with the same reference numerals.

  In FIG. 1, the leak determination unit D10 of the present embodiment includes process information such as the pressure, flow rate, density, temperature, material characteristics, and operating state of the transfer device of the solution transfer system input from the process input means 1. A solution transfer system is selected by comparing the conditions for starting and completing the transfer of the solution stored in advance in the transfer information F1, and the balance between the transfer devices in the selected transfer system is set on the payout side and the receiving side. The transfer determination means D1 which is stored in the information F2 and notified to the screen display means 4, the process information inputted from the process input means 1, the leak detection signal from the leak detection sensor, and the temperature and substance detected by the leak detection sensor Leakage alarm input from characteristics and alarm determination means 2, transfer system specified by transfer determination means D1, and transfer system stored in device information F2 By comparing the temperature and material characteristics of the transfer solution with respect to the transfer device and the transfer device under the transfer system, the transfer system in which leakage of the leaked liquid may occur and the transfer device and leaked liquid under the transfer system It is comprised from the leakage device specific | specification means D2 which pinpoints. FIG. 1 is a block diagram of the most basic leakage detection support apparatus according to the present invention.

Next, the flow of leak detection support processing of the leak detection support device of this embodiment will be described with reference to FIGS.
As shown in FIG. 2, the apparatus on the solution transfer system is divided into blocks B1 to B5, and the leak detection sensor 1SK and the leak detection sensor 2SX are installed in the block B4. For example, when the solution in the tank TP2 of the block B2 is transferred to the tank T1 of the block B4, the liquid supply side valve TV2 is “open”, the receiving side valve V1 is “open”, and the pump P1 is in operation. Judge that the solution is being transferred. Along with the transfer, the temperature, pressure, flow rate, liquid level, density, liquidity, etc. of the sensor TS2 on the liquid supply side and the temperature, pressure, flow rate, liquid level, density, liquidity of the receiving side sensor S1 change. Then, the pump P1 is stopped and the valves TV2 and V1 are “closed” to complete the solution transfer.
When the transfer is completed, the balance concerning the mass transfer is stored in the device information F2 in FIG.

  Usually, it is common to use a computer to monitor the start, completion and transfer side and receiving side processes of the transfer, and provide the balance as operating information. However, the leak detection sensor 1SK and the leak are detected during the transfer. When the detection sensor 2SX detects a leak and a leak alarm is generated, for example, in FIG. 2, the tank TP2 of the block B2 contains the volatile solution E2 at 10 ° C., and the tank TP3 of the block B3 has 50 When the non-volatile solution E3 at 0 ° C. is contained, the pump P1 is operating, the valves TV2 and V1 are “open”, the pump P2 is stopped, and the valves TV3 and V2 are “closed”. When the leak detection sensor 1SK detects a volatile substance and the leak detection sensor 2SX detects the temperature of the leaked liquid and is around 10 ° C., the pump P1 or the valve V1 of the block B4 Or tank S1 or to assume the possibility of leakage in the appropriate line pipe in the block B4,, it displays the information on the screen together with leak alarm (Fig. 3 Case 3). In the case 3, for example, even when the leak detection sensor 1SK does not detect a volatile substance, if the leak detection sensor 2SX detects the temperature of the leaked liquid and is around 10 ° C., the pump P1 or the valve V1 of the block B4 Alternatively, it is determined that there is a high possibility of leakage in the corresponding system piping in the tank S1 or block B4, and this information is displayed on the screen together with the leakage alarm (case 1 in FIG. 3).

  Further, the pump P1 of the block B4 is stopped and the valves TV2 and V1 are “closed”, the pump P2 of the block B4 is also stopped and the valves TV3 and V2 are “closed”, and the transfer condition is not satisfied. In this case, when the leak detection sensor 1SK detects a volatile substance and the leak detection sensor 2SX detects the temperature of the leaked liquid, a solution leak during storage is considered. In this case, the change in the liquid level input from the sensor S1 of the tank T1 and the sensor S2 of the tank T2, the temperature input from the sensor S1 of the tank T1 and the temperature detected by the leak detection sensor 2SX, and the sensor S2 of the tank T2 Compare the input temperature and the temperature detected by the leak detection sensor 2SX and the liquidity of the tanks T1 and T2 of the block B4 stored in the device information F2 of FIG. 1 and the liquidity detected by the leak detection sensor 1SK. Since the temperature difference is within a certain range and the two conditions of volatile liquid match, the pump P1 of block B4, valve V1, tank S1, or the corresponding system piping in block B4 It is determined that there is a high possibility of leakage, and this information is displayed on the screen together with the leakage alarm (case 4 in FIG. 3).

  Usually, a system having different liquidity is arranged in one block, and a duplex system or the like is preferably divided into other blocks. In addition, the leakage judgment conditions are usually stored in the computer as a condition as much as possible, which is used when the operator identifies the leakage system by looking at the process parameters. Can be increased. As a result, even when there are a plurality of transfer systems in one block, a system in which leakage may occur is determined by a computer and provided as information when a leakage alarm occurs.

  According to the present embodiment, a solution transfer system is identified from a plurality of process information, the process information, a leak detection signal from the leak detection sensor, a temperature detected by the leak detection sensor, a material characteristic, a leak alarm, and the transfer system By comparing the temperature and material characteristics of the transfer solution with respect to the transfer system stored in advance and the transfer equipment under the transfer system, a transfer system in which leakage may occur from the transfer system Can be identified. Accordingly, since it is possible to detect a leak and specify a device with a few leak detection sensors, it is possible to specify a leak system or a leaked device in a short time. Also, the installation space and cost can be reduced by the amount of leak detection sensors.

FIG. 4 is a block diagram of a leakage detection support apparatus according to the second embodiment of the present invention.
The configuration in which the leak detection support apparatus 20 of the present embodiment is different from the leak detection support apparatus of the first embodiment of FIG. 1 is a configuration in which a leak information determination unit D20 having a leak display determination means D3 and substance information F3 is added. Since the other configuration is the same as that of the first embodiment of FIG. 1, the same components are described with the same reference numerals.

  In FIG. 4, the leakage information determination unit D20 of the present embodiment includes process information such as the pressure, flow rate, density, temperature, material characteristics, and operating state of the transfer device of the plant of the solution transfer system from the process input unit 1; Transfer device and solution that match by comparing the transfer system from the leak device specifying means D2, the transfer device under the transfer system, the information on the leaked liquid, and the transfer system and transfer device stored in advance in the substance information F3 The information is taken out from the substance information F3 and arranged so that it can be confirmed at the same time. The information is displayed on the display device 5 through the screen display means 4, and the operator confirms the information and inputs the correctness from the display device 5. It includes a transfer system, a transfer device under the transfer system, and a leak display determining means D3 for determining leaked liquid.

Next, the flow of the leak detection support process of the leak detection support apparatus according to the present embodiment will be described with reference to FIGS.
In FIG. 2, for example, the tank TP2 of the block B2 on the liquid supply side contains a 10 ° C. volatile solution E2, and the liquid supply side tank TP3 of the block B3 contains a non-volatile solution E3 of 50 ° C. In many cases, the characteristics of each solution are analyzed in detail by prior sampling analysis and accumulated as the substance information F3 in FIG. 4 in the computer. When a leak occurs, it is important to quickly grasp the characteristics of the leaked liquid. These information and the transfer system determined by the leak display determination means D3, the transfer equipment under the transfer system, the leaked liquid and the figure 4 by selecting the matching solution characteristics by comparing the transfer system and the transfer device stored in advance in the substance information F3, and the temperature, pressure, flow rate, liquid level, density of the sensor TS2 on the liquid supply side of the system, Information such as liquidity and the temperature, pressure, flow rate, liquid level, density, liquidity of the receiving side sensor S1, and information such as temperature, pressure, flow rate, liquid level, density, liquidity of the sensor TS3 and the receiving side sensor S2 Temperature, pressure, flow rate, liquid level, density, liquid leak detection sensor 1SK and leak detection sensor 2SX, pump P1, P2 operating status, valves TV2, TV3 and V1, V2 open / closed status, etc. Seth information displayed simultaneously on the display device 5 via a screen display unit 4 of FIG. 4, a specific result of correctness determination computer may prompt the operator. Usually, when the site confirmation is possible, the information on the site and the leakage of the leakage tray U1 can be analyzed. Let the operator confirm. At this time, the process information of the temperature, pressure, flow rate, liquid level, density, liquidity, liquid leakage detection sensor 1SK and leakage detection sensor 2SX can be easily determined by updating to the latest value at a constant period.

  According to this embodiment, the process information and the specified transfer system when the transfer system that may have leaked in the first embodiment is specified, and the information of the leak detection sensor is under the specified transfer system. Transfer equipment, arranged and displayed so that the liquidity information of the leaked liquid can be confirmed at the same time, the transfer system in which leakage occurs by the operator checking the information, and the transfer equipment under the transfer system, Leakage can be determined. Therefore, by identifying the leaked system in advance and displaying the information at the time of identification, it is possible to determine the leaked system by encouraging the operator to make a comprehensive decision, and collecting and determining leaked information in a short time can do.

FIG. 5 is a block diagram of a leak detection support apparatus according to the third embodiment of the present invention.
The configuration in which the leak detection support device 20 of the present embodiment is different from the leak detection support device of the second embodiment of FIG. 4 is a configuration in which a leak stop information display unit D30 having a leak stop procedure display means D4 is added. Since the other configuration is the same as that of the fourth embodiment in FIG. 2, the same components will be described with the same reference numerals.

  In FIG. 5, the leakage stop information display unit D30 of the present embodiment is stored in advance in the device information F2 for the transfer system determined by the leakage display determination means D3, the transfer device and the leakage liquid under the transfer system. By comparing the transfer system and the transfer device, the leakage stop procedure of the matching transfer system is displayed on the display device 5 through the screen display means 4, and the determined amount of solution in the transfer system is displayed in the device information F2. It can be calculated and calculated from the arrangement and shape of the transfer device stored in the table, the operating state / flow rate of the transfer device from the process input means 1, the liquid level of the supply tank and the receiving tank of the transfer liquid, and can be confirmed simultaneously with the leakage stop procedure The leakage stop procedure display means D4 is displayed.

Next, the flow of the leak detection support process of the leak detection support apparatus according to the present embodiment will be described with reference to FIGS.
In FIG. 2, for example, the leakage display determination means D3 in FIG. 5 determines that there is a high possibility of leakage in the pump P1 in the block B4, the valve V1, or the tank S1, or the corresponding system piping in the block B4. In this case, the operation procedure of stopping the pump P1 and “closing” the valves TV2 and V1 is displayed on the display device 5 via the screen display means 4. Further, the transfer system determined by the leakage display determination means D3 in FIG. 5 and the transfer equipment under the transfer system, the leakage liquid, and the transfer system and transfer equipment stored in the device information F2 in FIG. 5 are compared. The amount of solution held in the transfer system is calculated from the arrangement / shape of transfer equipment such as piping and the liquid level of the tank T1, and displayed on the display device 5 via the screen display means 4 of FIG. If the arrangement and shape differ greatly depending on the device, it is preferable to store a calculation formula in advance in the device information F2 in FIG. Normally, the leak detection sensor 2SX installed in the leak receiving tray U1 may not be installed up to the liquid level meter. By knowing in advance how much leakage is possible, It is possible to provide information for judging the operation of stopping the leakage and the timing of collecting the leakage.

  According to the present embodiment, the transfer system in which the leakage is confirmed in the second embodiment, the transfer equipment under the transfer system, the leakage liquid and the leakage stop procedure related to the transfer system are displayed and after the leakage stop The expected leakage amount is calculated from the arrangement, shape, operating state, flow rate of the transfer equipment, and the liquid level, density, and temperature of the supply tank and receiving tank of the transfer liquid, and the leakage stop procedure and the retention of the solution in the transfer system determined The amount can be displayed so that it can be confirmed at the same time. Therefore, the leakage stop operation can be performed in a short time by displaying the leakage stop means of the determined leakage system. In addition, by calculating and displaying the amount of liquid retained in the leakage system, it is possible to determine information collection for leakage recovery in a short time.

FIG. 6 is a block diagram of a leak detection support apparatus according to the fourth embodiment of the present invention.
The leak detection support apparatus 20 of the present embodiment is different from the leak detection support apparatus of the third embodiment of FIG. 5 in that a leak recovery procedure display having recovery information F4, a leak recovery determination means D5, and a leak recovery procedure display means D6. This is a configuration in which the part D40 is added, and the other configuration is the same as that of the third embodiment of FIG. 5, and therefore, the same components are described with the same reference numerals.

  In FIG. 6, the leakage recovery procedure display unit D40 of the present embodiment is stored in the transfer system determined by the leakage display determination means D3, the transfer device under the transfer system, the leaked liquid, and the recovery information F4. In order to compare the transfer system, transfer equipment, and leaked liquid, and to collect information on the leaked liquid that matches the leaked liquid, processing solution liquidity and volume required for processing the leaked liquid, supply tank, transfer equipment, etc. Leakage recovery determination means D5 for selecting the recovery procedure, recovery tank / transfer equipment / transfer capability, the transfer system determined by the leak display determination means D3, the transfer equipment under the transfer system, and the process input means 1 for the leaked liquid Through the screen display means 4 so that the process information such as the liquid level from the liquid and the information necessary for the collection of the leaked liquid such as the solution information, the collection procedure, the collection tank, the transfer device, and the transfer capability can be checked at the same time. , And a leakage recovery procedure display unit D6 Metropolitan to be displayed on the display device 5.

Next, the flow of the leak detection support process of the leak detection support apparatus according to the present embodiment will be described with reference to FIGS.
In FIG. 2, the leaked liquid leaked to the leak tray U1 is collected in the tank T4 of the recovery destination block B5 after being neutralized by, for example, injecting the neutralized solution E1 from the tank TP1 of the block B1. And the case of collecting in the tank T3 of the final transfer destination block B5. Since these differ depending on the liquidity and amount of the leaked solution, the transfer system, the transfer device under the transfer system, the leaked liquid, and the recovery information F4 in FIG. By comparing the transfer system and leaked liquid stored in, select the processing solution information such as the liquidity / liquid amount of the processing solution, supply tank, transfer equipment, etc. necessary for the processing of the matching leaked liquid, 6 is notified to the leakage recovery procedure display means D6. In the leakage recovery procedure display means D6 of FIG. 6, for example, when leakage occurs during transfer of the volatile solution E2 from the tank TP2 of the block B2 to the tank T1 of the block B4, the solution used for neutralization is the tank of the block B1. For the solution E1 in TP1 and its liquidity, retained amount, transfer method, for example, the valve VS1 “open” and the liquid level of the tank TP1 from the sensor TS1 input from the process input means 1, for injection The process information such as the state of the valve TV1 may be displayed on the display device 5 via the screen display means 4 of FIG. As a procedure for transferring the neutralized leaked liquid to the tank T4 of the block B5, a procedure such as “open” operation of the valve V6, “operation” of the pump P4, and the valve V6 pump P4, sensor Process information such as S3 and sensor S4 may be simultaneously displayed on the display device 5 of FIG. As a case where direct recovery is possible, for example, when leakage occurs during transfer of the non-volatile solution E3 from the tank TP3 to the tank T2 in the block B5, the processing solution information is not displayed, and the valve V6 is used as a recovery procedure to the tank T4. "Open" and "Operation" of the pump P4 may be displayed on the display device 5 of FIG.

  According to this embodiment, the transfer system determined in the leakage information display section of the second embodiment and the transfer equipment, leaked liquid under the transfer system, and the transfer system, transfer equipment or leaked liquid stored in advance are stored. By comparing, the liquidity / liquid amount of the processing solution required for processing the matching leaked liquid, the processing solution information such as the supply tank, transfer equipment, and the recovery procedure for collecting the leaked liquid, the recovery tank / transfer equipment, It has a leak recovery procedure display section having a leak recovery procedure display means for displaying information necessary for recovery of leaked liquid such as transfer capability and leaked liquid recovery tank / transfer equipment / transfer capability. Therefore, the liquidity / liquid volume of the processing solution necessary for the treatment of the leaked liquid such as neutralization after the occurrence of the leak, the processing solution information such as the supply tank, transfer equipment, and the recovery procedure for collecting the leaked liquid, By displaying the transfer device, transfer capability, etc., it is possible to collect and determine information related to the collection of leaked liquid in a short time, and the collection time of leaked liquid can be shortened.

The block block diagram of the leak detection assistance apparatus which is the 1st Embodiment of this invention. Schematic which shows the flow of the process of the leak detection assistance by this invention. The figure which shows the case judged by the combination of the presence or absence of the system in transfer in FIG. 2, and the detection of a leak detection sensor. The block block diagram of the leak detection assistance apparatus which is the 2nd Embodiment of this invention. The block block diagram of the leak detection assistance apparatus which is the 3rd Embodiment of this invention. The block block diagram of the leak detection assistance apparatus which is the 4th Embodiment of this invention. The block block diagram of the conventional leak detection assistance apparatus.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Process input means, 2 ... Alarm determination means, 3 ... Alarm display means, 4 ... Screen display means, 5 ... Display apparatus, 10 ... Process monitoring apparatus, 20 ... Leak detection support apparatus, D1 ... Transfer determination means, D2 ... Leakage device identification means, D3 ... Leakage display determination means, D4 ... Leakage stop procedure display means, D5 ... Leakage recovery determination means, D6 ... Leakage recovery procedure display means, F1 ... Transfer information, F2 ... Equipment information, F3 ... Substance information, F4 ... Recovery information, D10 ... Leakage determination unit, D20 ... Leakage information determination unit, D30 ... Leakage stop information display unit, D40 ... Leakage recovery procedure display unit.

Claims (4)

  Specify the solution transfer system from the process information of the plant of the solution transfer system, install a leak detection sensor for each block, and input the detection value of the leak detection sensor to the alarm determination means to determine whether an alarm Is a leak detection support apparatus that displays an alarm on a display device if an alarm state is detected, and includes a leak detection signal from the leak detection sensor, a temperature detected by the leak detection sensor, a material characteristic, the process information, and Leakage having transfer determination means for comparing and determining transfer systems, a transfer system in which leakage may occur by the transfer determination means, and a leakage device specifying means for specifying a transfer device and leakage liquid under the transfer system A leakage detection support apparatus comprising a detection determination unit.   The leak detection support apparatus according to claim 1, wherein the process information of the plant of the solution transfer system, the transfer system in which leakage may occur, the transfer device under the transfer system, and the liquidity of the leaked liquid A leak detection support apparatus comprising a leak information determination unit that displays information so that the information can be confirmed simultaneously and easily identifies a transfer system and transfer equipment or leaked liquid under the transfer system.   3. The leak detection support apparatus according to claim 2, wherein the transfer system in which the leaked liquid is specified and the leakage stop procedure of the transfer device under the transfer system are displayed and the amount of solution held in the specified transfer system is displayed in the transfer device. A leak detection support device comprising a leak stop information display unit that calculates and confirms the arrangement, shape, operating state, flow rate, and liquid level of a supply tank and a receiving tank of a transfer liquid.   3. The leakage detection support apparatus according to claim 2, wherein the liquidity / liquid amount, supply tank, and transfer of the processing solution necessary for processing the leakage liquid of the transfer system in which the leakage liquid is specified and the transfer equipment under the transfer system Equipped with information on processing solution such as equipment, recovery procedure for recovering leaked liquid, and a recovery procedure display section for displaying leaked liquid, recovery equipment, transfer capability, information necessary for recovering leaked liquid, etc. A leakage detection support apparatus characterized by that.

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