CN116857554A - Liquefied hydrocarbon storage tank leakage positioning method, emergency disposal method and device - Google Patents
Liquefied hydrocarbon storage tank leakage positioning method, emergency disposal method and device Download PDFInfo
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- CN116857554A CN116857554A CN202310809377.0A CN202310809377A CN116857554A CN 116857554 A CN116857554 A CN 116857554A CN 202310809377 A CN202310809377 A CN 202310809377A CN 116857554 A CN116857554 A CN 116857554A
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- 239000004215 Carbon black (E152) Substances 0.000 title claims abstract description 87
- 229930195733 hydrocarbon Natural products 0.000 title claims abstract description 87
- 150000002430 hydrocarbons Chemical class 0.000 title claims abstract description 87
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000007788 liquid Substances 0.000 claims abstract description 88
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 65
- 238000002347 injection Methods 0.000 claims abstract description 56
- 239000007924 injection Substances 0.000 claims abstract description 56
- 238000004364 calculation method Methods 0.000 claims abstract description 9
- 230000000007 visual effect Effects 0.000 claims description 15
- 230000001133 acceleration Effects 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 7
- 230000005484 gravity Effects 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 6
- 239000011550 stock solution Substances 0.000 claims description 4
- 239000000126 substance Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
- F17C13/021—Special adaptations of indicating, measuring, or monitoring equipment having the height as the parameter
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
- F17C13/025—Special adaptations of indicating, measuring, or monitoring equipment having the pressure as the parameter
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/03—Dealing with losses
- F17C2260/035—Dealing with losses of fluid
- F17C2260/036—Avoiding leaks
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The application discloses a liquefied hydrocarbon storage tank leakage positioning method, which is characterized in that the liquid level height and the gas-phase gauge pressure in a liquefied hydrocarbon storage tank are detected at fixed time intervals, and the height position of a leakage point is obtained through calculation of leakage intensity. The application discloses an emergency treatment method for leakage of a liquefied hydrocarbon storage tank, which is characterized in that theoretical leakage time, water injection action time and liquid storage discharge time are calculated after the height position of a leakage point is determined, and then water injection measures or liquid storage discharge measures are determined. The application also discloses a liquefied hydrocarbon storage tank leakage emergency treatment device for realizing the emergency treatment method. The application provides a basis for an emergency treatment scheme, can ensure the safety and reliability of treatment and improves the effectiveness of emergency treatment.
Description
Technical Field
The application relates to a leakage positioning and emergency disposal method, in particular to a liquefied hydrocarbon storage tank leakage positioning method, an emergency disposal method and a device.
Background
At present, a storage tank leakage monitoring and early warning method is quite mature, but little attention is paid to the positioning of leakage points, and the accurate positioning of the leakage points is very important in the aspect of liquefying a hydrocarbon storage tank. For liquefied hydrocarbon storage tanks where leakage occurs, emergency disposal may be performed by a water injection operation. However, if the leak point of the storage tank cannot be determined, blind flooding may accelerate leakage of liquefied hydrocarbon and not prevent leakage. The prior art has the leakage point positioning methods which are mainly applicable to various pipelines, but the methods are not applicable to large-scale liquefied hydrocarbon storage tanks.
Disclosure of Invention
Aiming at the defects of the prior art, the application provides a liquefied hydrocarbon storage tank leakage positioning method, and aims to realize the determination of the height of a liquefied hydrocarbon storage tank leakage point and provide a basis for an emergency disposal scheme. The application also provides an emergency treatment method and an emergency treatment device for the leakage of the liquefied hydrocarbon storage tank, so that the safety and reliability of treatment are ensured, and the effectiveness of emergency treatment is improved.
The technical scheme of the application is as follows: a liquefied hydrocarbon storage tank leak location method comprising the steps of: detecting the liquid level height and the air-phase gauge pressure in the liquefied hydrocarbon storage tank at fixed time intervals, and calculating the height position of the leakage point through a formula, wherein the formula is that
Wherein h is t For the liquid level height at time t, h t-Δt For the level height delta t from time t, h t-2Δt For a level height, p, separated from time t by a time of 2 Δt t Is the gas phase gauge pressure in the liquefied hydrocarbon storage tank at the time t, p t-Δt For the gas phase gauge pressure in the liquefied hydrocarbon storage tank at an interval delta t from time t, ρ l G is gravity acceleration, L, the density of the liquid in the liquefied hydrocarbon storage tank t Is the distance from the leakage point to the liquid surface.
Further, the time interval is 1-3 s.
The other technical scheme of the application is as follows: a liquefied hydrocarbon storage tank leak emergency disposal method, comprising: detecting liquid level height and gas gauge pressure in the liquefied hydrocarbon storage tank at fixed time intervals, and entering a treatment step when the rate of change of the liquid level height exceeds a rate change threshold; the disposing step includes: calculating the height position of the leakage point and the theoretical leakage time,
wherein h is t For the liquid level height at time t, h t-Δt For the level height delta t from time t, h t-2Δt For a level height, p, separated from time t by a time of 2 Δt t Is the gas phase gauge pressure in the liquefied hydrocarbon storage tank at the time t, p t-Δt For the gas phase gauge pressure in the liquefied hydrocarbon storage tank at an interval delta t from time t, ρ l G is gravity acceleration, L, the density of the liquid in the liquefied hydrocarbon storage tank t The distance from the leakage point to the liquid level;
wherein t is e For the theoretical leakage time, A f A 'is the cross-sectional area of the liquefied hydrocarbon storage tank' d Is the equivalent leakage area;
when the water injection action time is smaller than the time threshold value, water is injected into the liquefied hydrocarbon storage tank;
the water injection action time is determined by the following formula
Wherein t is z For the water injection time, v z，max Is the maximum volume flow of water injection.
Further, the disposing step includes: when the water injection action time is greater than or equal to a time threshold and the liquid storage discharge time is less than the time threshold, discharging the liquid storage from the liquefied hydrocarbon storage tank;
the liquid storage discharge time is determined by the following formula
Wherein t is q For the discharge time of the stock solution, v q,max The maximum volume flow is discharged for the reservoir.
Further, the disposing step includes: and displaying the theoretical leakage time, the water injection action time and the liquid storage discharge time and performing audible and visual alarm.
Further, the time threshold is not greater than 0.3 times the theoretical leak time.
The application also provides a technical scheme that: a liquefied hydrocarbon storage tank leak emergency disposal device, comprising:
the monitoring module is used for detecting the liquid level height and the gas phase gauge pressure in the liquefied hydrocarbon storage tank at fixed time intervals;
the judging module is used for calling the disposal module when the rate of the liquid level height change exceeds a rate change threshold value;
the treatment module comprises a calculation module and a water injection module;
the calculation module is used for calculating the height position of the leakage point and the theoretical leakage time,
wherein h is t For the liquid level height at time t, h t-Δt For the level height delta t from time t, h t-2Δt For a level height, p, separated from time t by a time of 2 Δt t Is the gas phase gauge pressure in the liquefied hydrocarbon storage tank at the time t, p t-Δ For the gas phase gauge pressure in the liquefied hydrocarbon storage tank at an interval delta t from time t, ρ l G is gravity acceleration, L, the density of the liquid in the liquefied hydrocarbon storage tank t Is the distance from the leakage point to the liquid level；
Wherein t is e For the theoretical leakage time, A f A 'is the cross-sectional area of the liquefied hydrocarbon storage tank' d Is the equivalent leakage area;
the water injection module is used for injecting water into the liquefied hydrocarbon storage tank when the water injection action time is smaller than a time threshold value;
the water injection action time is determined by the following formula
Wherein t is z For the water injection time, v z，max Is the maximum volume flow of water injection.
Further, the disposal module includes a reservoir draining module for draining the reservoir from the liquefied hydrocarbon storage tank when the water injection action time is greater than or equal to a time threshold and the reservoir draining time is less than the time threshold;
the liquid storage discharge time is determined by the following formula
Wherein t is q For the discharge time of the stock solution, v q,max The maximum volume flow is discharged for the reservoir.
Further, the treatment module comprises a display and audible and visual alarm module, the display module is used for displaying the theoretical leakage time, the water injection action time and the liquid storage discharge time, and the audible and visual alarm module is used for performing audible and visual alarm.
The technical scheme provided by the application has the advantages that:
the method of the application judges the height position of the leakage point by the data measured by the liquid level sensor, has less detection data, is simple and quick to calculate, further determines the time information of emergency treatment, and provides accurate basis for the selection of specific treatment measures. The method has strong operability, is accurate and reliable, and can remarkably improve the effectiveness of the emergency treatment method.
Drawings
FIG. 1 is a schematic diagram of liquefied hydrocarbon storage tank leak.
FIG. 2 is a schematic flow chart of a method for emergency disposal of liquefied hydrocarbon storage tank leakage in accordance with an embodiment of the present application.
FIG. 3 is a schematic diagram of a liquefied hydrocarbon storage tank leak emergency disposal device module of the present application.
Fig. 4 is a schematic physical module structure of an emergency treatment device for liquefied hydrocarbon storage tank leakage according to an embodiment of the present application.
Detailed Description
The present application is further described below with reference to examples, which are to be construed as merely illustrative of the present application and not limiting of its scope, and various modifications to the equivalent arrangements of the present application will become apparent to those skilled in the art upon reading the present description, which are within the scope of the application as defined in the appended claims.
Leakage of the liquefied hydrocarbon storage tank is shown in fig. 1, a liquid level sensor is arranged in the liquefied hydrocarbon storage tank to obtain the liquid level height in the liquefied hydrocarbon storage tank in real time, the liquid level sensor comprises but is not limited to an ultrasonic liquid level sensor, the sampling time interval is less than 3s, and the resolution is less than or equal to 5mm. And a pressure sensor is arranged in the liquefied hydrocarbon storage tank to acquire the gas phase gauge pressure in the liquefied hydrocarbon storage tank in real time, and the frequency of the pressure sensor is synchronously matched with the liquid level sensor.
Calculating the leakage intensity corresponding to the t moment and the t-delta t moment through formulas (1) and (2) respectively
For the liquid leakage intensity corresponding to time t +.>The liquid leakage intensity corresponding to the time interval delta t (t-delta t moment) of the time t is h t For the liquid level height at time t, h t-Δt For the level height delta t from time t, h t-2Δt For a level height, p, separated from time t by a time of 2 Δt t Is the gas phase gauge pressure in the liquefied hydrocarbon storage tank at the time t, p t-Δt For the gas phase gauge pressure in the liquefied hydrocarbon storage tank at an interval delta t from time t, ρ l G is gravity acceleration, L, for liquefying density of liquid in hydrocarbon storage tank t A is the distance from the leakage point to the liquid level f To liquefy the cross-sectional area of the hydrocarbon storage tank, A' d Is the equivalent leakage area. The equivalent leak area is the actual area of the leak multiplied by a factor that is related to the shape of the leak, e.g. the leak is triangular, then the factor takes 0.60.
From L t ＝L t-Δt -(h t-Δ -h t ) Can be obtained by combining the formulas (1) and (2)
The unknown quantity in formula (3) is L only t Namely, the distance from the leakage point to the liquid level can be obtained by solving the formula (3).
Referring to fig. 2, the emergency treatment method for leakage of the liquefied hydrocarbon storage tank of the present embodiment is as follows:
the level and the barometric pressure in the liquefied hydrocarbon storage tank are detected and recorded at regular time intervals, which, as previously mentioned, are typically less than 3s, and may be 1-2 s.
Calculating the rate of change of the liquid level height from equation (4)
Setting a speed change threshold (which may be 0.001), and entering a treatment step when the calculated speed of the change of the liquid level height exceeds the speed change threshold;
the treatment steps comprise: and calculating the height position of the leakage point, theoretical leakage time, water injection action time and liquid storage discharge time, displaying the calculated theoretical leakage time, water injection action time and liquid storage discharge time, and performing audible and visual alarm.
The height position of the leakage point is the distance from the leakage point to the liquid level can be obtained by solving the formula (3).
Assuming that the gas phase gauge pressure does not change significantly with time in a short period of time, the theoretical time t required for the container to empty to the liquid level at the leak point can be deduced from formula (1) e ：
The water injection action time is the action time of water injection measures, the water injection measures are to inject water into the storage tank, the liquid level of dangerous chemicals is improved, substances below the leakage point are water, and therefore safety is guaranteed. Time t of water injection z Calculated from equation (6)
Wherein v is z ， max Is the maximum volume flow of water injection.
The liquid storage discharging time is the working time of an emergency switching measure, and the emergency switching measure is to extract and transfer dangerous chemicals in the liquefied hydrocarbon storage tank to other storage tanks so as to reduce the liquid level of the dangerous chemicals to a leakage point, thereby ensuring safety. Liquid storage discharge time t q Calculated from equation (7)
Wherein v is q,max The maximum volume flow is discharged for the reservoir.
And judging three times after calculating the theoretical leakage time, the water injection action time and the liquid storage discharge time. When the water injection time is less than the time threshold (the time threshold is generally not more than 0.3 times the theoretical leakage time, in this embodiment, 0.1 times), i.e., t z <0.1t e When the water source is enough, starting water injection measures; when the water injection action time is greater than or equal to the time threshold and the liquid storage discharge time is less than the time threshold, namely t q <0.1t e And when the emergency switching measures are started. If the automatic starting conditions of the water injection measure and the emergency switching measure are not met, the safety personnel manually select the corresponding emergency measure according to the related information displayed in the central control room.
Referring to fig. 3 and 4, the present embodiment provides an emergency treatment device for implementing the emergency treatment method for liquefied hydrocarbon storage tank leakage in the above embodiment, which includes a monitoring module 100, a discriminating module 101, and a treatment module 102, wherein the treatment module 102 includes a calculating module 102a, a water injection module 102b, a liquid storage discharging module 102c, a display module 102d, and an audible and visual alarm module 102e.
The monitoring module 100 detects the level of liquid and the barometric pressure in the liquefied hydrocarbon storage tank at regular time intervals. The discrimination module 101 invokes the treatment module 102 to perform treatment when the rate of change of the liquid level height exceeds a rate change threshold. The calculation module 102a calculates the height position of the leakage point, the theoretical leakage time, the water injection action time, and the reservoir discharge time, and the specific calculation method is not described in detail in the previous embodiment. The water injection module 102b is configured to inject water into the liquefied hydrocarbon storage tank when the water injection action time is less than the time threshold, and the liquid storage discharge module 102c is configured to discharge liquid storage from the liquefied hydrocarbon storage tank when the water injection action time is greater than or equal to the time threshold and the liquid storage discharge time is less than the time threshold. The display module is used for displaying theoretical leakage time, water injection action time and liquid storage discharge time, and a site safety person can decide what kind of emergency measures to take according to display information. The audible and visual alarm module is used for performing audible and visual alarm.
Fig. 4 shows a specific configuration of a liquefied hydrocarbon storage tank leakage emergency disposal device, including a single chip microcomputer 200 as a core controller. The single chip microcomputer 200 is respectively connected with a liquid level sensor 201, a pressure sensor 202, a display device 203, a field control button 204, a water injection control valve 205, an emergency switching valve 206, a wireless transmission module 207, a power supply device 208 and an audible and visual alarm device 209. The wireless transmission module 207 is connected with the central control room 210, so that data transmission between the singlechip 200 and the central control room 210 is realized. The liquid level sensor 201 and the pressure sensor 202 are main components of the monitoring module 100, the display device 203 is a main component of the display module 102d, and the audible and visual alarm device 209 is a main component of the audible and visual alarm module 102e. The water injection control valve 205 is used for realizing the water injection function of the water injection module 102b, and the emergency switching valve 206 is used for realizing the liquid storage discharging function of the liquid storage discharging module 102 c. The power supply 208 uses dual power supply to power the liquefied hydrocarbon storage tank leak emergency disposal device.
The liquefied hydrocarbon storage tank leakage emergency treatment device is realized, the diameter of the storage tank is set to be 50cm, and the initial liquid level height is set to be 50cm. The diameter of the leakage point is 1cm, and the distance from the liquid level is 40cm. The gas phase pressure being normal, i.e. p t =0kpa. The liquid level sensor is an ultrasonic sensor, the sampling frequency is set to be 2s, and the liquid level sensor is arranged right above the storage tank. After the opening device works stably for 1 minute, the leakage point plug is removed. Table 1 shows the results of the real-time test and calculation.
TABLE 1 partial results of real-time test level and leak location calculations
| t,s | 12 | 14 | 16 | 18 | 20 | 22 | 24 | 26 | 28 | 30 |
| h,mm | 486.65 | 484.44 | 482.25 | 480.06 | 477.87 | 475.69 | 473.52 | 471.36 | 469.20 | 467.04 |
| L,mm | 4034.93 | 265.40 | 383.35 | 381.15 | 378.97 | 376.78 | 374.61 | 372.44 | 370.28 | 368.12 |
L in the table is the height of the leakage point from the liquid level, and the rate of change of the liquid level height is about 4.0X10 -3 Greater than 1.0X10 -3 And (5) starting an audible and visual alarm. Theoretical leakage time t e About 710s. The maximum flow of the matched water injection electromagnetic valve is 30 liters/min, and the corresponding water injection action time t z The theoretical leakage time is 39.27 seconds, which is less than 0.1 times, so that the water injection control valve is opened to inject water into the liquefied hydrocarbon storage tank, and emergency treatment is implemented.
Claims (10)
1. A liquefied hydrocarbon storage tank leak location method comprising the steps of:
detecting the liquid level height and the air-phase gauge pressure in the liquefied hydrocarbon storage tank at fixed time intervals, and calculating the height position of the leakage point through a formula, wherein the formula is that
Wherein h is t For the liquid level height at time t, h t-Δt For the level height delta t from time t, h t-2α For a level height, p, separated from time t by a time of 2 Δt t Is the gas phase gauge pressure in the liquefied hydrocarbon storage tank at the time t, p t-Δt For the gas phase gauge pressure in the liquefied hydrocarbon storage tank at an interval delta t from time t, ρ l G is gravity acceleration, L, the density of the liquid in the liquefied hydrocarbon storage tank t Is the distance from the leakage point to the liquid surface.
2. The liquefied hydrocarbon storage tank leak location method as recited in claim 1, wherein the time interval is 1 to 3 seconds.
3. A liquefied hydrocarbon storage tank leak emergency disposal method, comprising: detecting liquid level height and gas gauge pressure in the liquefied hydrocarbon storage tank at fixed time intervals, and entering a treatment step when the rate of change of the liquid level height exceeds a rate change threshold; the disposing step includes: calculating the height position of the leakage point and the theoretical leakage time,
wherein h is t For the liquid level height at time t, h t-Δt For the level height delta t from time t, h t-2Δt For a level height, p, separated from time t by a time of 2 Δt t Is the gas phase gauge pressure in the liquefied hydrocarbon storage tank at the time t, p t-Δt For the gas phase gauge pressure in the liquefied hydrocarbon storage tank at an interval delta t from time t, ρ l G is gravity acceleration, L, the density of the liquid in the liquefied hydrocarbon storage tank t The distance from the leakage point to the liquid level;
wherein t is e For the theoretical leakage time, A f A 'is the cross-sectional area of the liquefied hydrocarbon storage tank' d Is the equivalent leakage area;
when the water injection action time is smaller than the time threshold value, water is injected into the liquefied hydrocarbon storage tank;
the water injection action time is determined by the following formula
Wherein t is z For the water injection time, v z，max Is the maximum volume flow of water injection.
4. A liquefied hydrocarbon storage tank leak emergency disposal method as claimed in claim 3, wherein the disposal step comprises: when the water injection action time is greater than or equal to a time threshold and the liquid storage discharge time is less than the time threshold, discharging the liquid storage from the liquefied hydrocarbon storage tank;
the liquid storage discharge time is determined by the following formula
Wherein t is q For the discharge time of the stock solution, v q,max The maximum volume flow is discharged for the reservoir.
5. A liquefied hydrocarbon storage tank leak emergency disposal method as claimed in claim 3, wherein the disposal step comprises: and displaying the theoretical leakage time, the water injection action time and the liquid storage discharge time and performing audible and visual alarm.
6. The liquefied hydrocarbon storage tank leak emergency treatment method of claim 3 or 4, wherein the time threshold is not greater than 0.3 times a theoretical leak time.
7. A liquefied hydrocarbon storage tank leak emergency disposal device, comprising:
the monitoring module is used for detecting the liquid level height and the gas phase gauge pressure in the liquefied hydrocarbon storage tank at fixed time intervals;
the judging module is used for calling the disposal module when the rate of the liquid level height change exceeds a rate change threshold value;
the treatment module comprises a calculation module and a water injection module;
the calculation module is used for calculating the height position of the leakage point and the theoretical leakage time,
wherein h is t For the liquid level height at time t, h t-Δt For the level height delta t from time t, h t-2Δt For a level height, p, separated from time t by a time of 2 Δt t Is the gas phase gauge pressure in the liquefied hydrocarbon storage tank at the time t, p t-Δt For the gas phase gauge pressure in the liquefied hydrocarbon storage tank at an interval delta t from time t, ρ l G is gravity acceleration, L, the density of the liquid in the liquefied hydrocarbon storage tank t The distance from the leakage point to the liquid level;
wherein t is e For the theoretical leakage time, A f A 'is the cross-sectional area of the liquefied hydrocarbon storage tank' d Is the equivalent leakage area;
the water injection module is used for injecting water into the liquefied hydrocarbon storage tank when the water injection action time is smaller than a time threshold value;
the water injection action time is determined by the following formula
Wherein t is z For the water injection time, v z，max Is the maximum volume flow of water injection.
8. The liquefied hydrocarbon storage tank leakage emergency treatment device of claim 7, wherein the treatment module includes a liquid storage discharge module for discharging liquid storage from the liquefied hydrocarbon storage tank when a water injection on time is greater than or equal to a time threshold and a liquid storage discharge time is less than a time threshold;
the liquid storage discharge time is determined by the following formula
Wherein t is q For the discharge time of the stock solution, v q,max Discharge the maximum volume for the liquid storageFlow rate.
9. The liquefied hydrocarbon storage tank leakage emergency treatment device of claim 7, wherein the treatment module comprises a display module for displaying the theoretical leakage time, the water injection action time and the liquid storage discharge time, and an audible and visual alarm module for performing audible and visual alarm.
10. The liquefied hydrocarbon storage tank leak emergency treatment apparatus of claim 7 or 8, wherein the time threshold is not greater than 0.3 times a theoretical leak time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310809377.0A CN116857554A (en) | 2023-07-04 | 2023-07-04 | Liquefied hydrocarbon storage tank leakage positioning method, emergency disposal method and device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310809377.0A CN116857554A (en) | 2023-07-04 | 2023-07-04 | Liquefied hydrocarbon storage tank leakage positioning method, emergency disposal method and device |
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| CN116857554A true CN116857554A (en) | 2023-10-10 |
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| CN202310809377.0A Pending CN116857554A (en) | 2023-07-04 | 2023-07-04 | Liquefied hydrocarbon storage tank leakage positioning method, emergency disposal method and device |
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- 2023-07-04 CN CN202310809377.0A patent/CN116857554A/en active Pending
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