CN101038201A - Intelligent measuring and counting system of oil product tank farm - Google Patents
Intelligent measuring and counting system of oil product tank farm Download PDFInfo
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- CN101038201A CN101038201A CN 200710021678 CN200710021678A CN101038201A CN 101038201 A CN101038201 A CN 101038201A CN 200710021678 CN200710021678 CN 200710021678 CN 200710021678 A CN200710021678 A CN 200710021678A CN 101038201 A CN101038201 A CN 101038201A
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Abstract
The present invention relates to an intelligent measuring system of the finished oil can area including: a measuring device for collecting data in time; a data collecting device for receiving and correcting the collected data; a main control unit for transmitting all the data obtained by the data collecting device to the computer; a computer control device for computing to obtain the oil stocks according to the measured data and for monitoring the data of the oil can area in time. The intelligent measuring system of the finished oil can area is a complex system for computing the stocks and monitoring in real time. The characteristics are: a problem resolving method containing measuring, computing and monitoring is provided. The devices have a high measuring and computing precise and speed.
Description
Technical field
The present invention relates to a kind of measuring system of measuring liquid data in the product tank, especially, relate to a kind of product oil tank field intelligent measuring systems.
Background technology
Oil the operator measure product tank, its objective is by measuring the fluid position to learn the liquid level of jar interior oil product, thereby calculate the goods entry, stock and sales oil mass, reaches oil mass is monitored in real time.Present measuring method is to adopt manual one-level or secondary dipping in the detection hole at oil tank top, detects oil level by hand dipping.Each jar all needs manual detection.Directly calculate after measuring measured value.Different dippings is measured same oil level calculate without any automatic compensation, exist the inconsistent measured value that causes of individual gimmick different during manual measurement, and dipping own just have error, so also can obtain different measured values.
The Level Detection standard of domestic petroleum industry vertical tank is according to GB/T13894-1992 " oil and liquid level petroleum products level gauge (manual method) ".Manual inspection is with the uncertainty of ullage rule: the secondary ullage rule is 0.3+0.2L in the time of 20 ℃.Use the linear expansion coefficient (11.9 * 10-6/ ℃) of also wanting the calculated amount dipstick in other temperature.For example: the value of reading uncertainty in the time of 20 ℃ in 10m place is 2.3mm; Increased 1.8mm in the time of 35 ℃ again, comprehensive uncertainty is 4.1mm.
Except that the uncertainty of ullage rule, also be subjected to the influence of other factors.As: manual inspection operative employee is different with operative employee's gimmick, and the error of 1mm is also often arranged with secondary difference for the first time.So only as the metering examination of enterprises, can not be as trade transaction.
Summary of the invention
The present invention is in order to address the above problem, a kind of product oil tank field intelligent measuring systems is provided, this system is on the basis of measuring real data, measured data is carried out correction-compensation, thereby obtain the data of more accurate oil product, for example, the quality of the volume of the density of oil tank volume, oil product, oil product and oil product.
Intelligent measuring and counting system of oil product tank farm of the present invention comprises the measurement mechanism that is used for real-time image data; Be used to receive data of being gathered and the data collector that the data of these collections are revised; All data that main control unit is used for the data collector that will obtain send computing machine to; Computer Control Unit is used for calculating according to measured data, obtains the tank farm stock of oil product and to the data in real time monitoring of tank field.
Product oil of the present invention tank field intelligent measuring systems, the measurement mechanism that wherein is used for real-time image data comprises magnetostriction liquidometer and temperature sensor, is used to measure oil level and and temperature.
Product oil of the present invention tank field intelligent measuring systems, wherein data collector is the correction that oil level by oil tank equipment just changes and the sedimentation of ground is carried out to the correction of measurement data.
Product oil of the present invention tank field intelligent measuring systems, wherein Computer Control Unit calculates oil tank volume, the density of oil product, the volume of oil product and the quality of oil product.
Product oil of the present invention tank field intelligent measuring systems, wherein Computer Control Unit calculates oil tank volume:
I, non-insulation jar:, Vt:=V20*[1+2a (t-20)]
Annotate: dip stick should carry out the temperature correction
V20: be the actual volume of oil product in the jar;
One jar of material linear expansion coefficient of a is got a=0.0000121C;
T=(t oil+t gas)/2; Fluid injection temperature in one jar of the t oil: the mean value of empty around one jar in the t gas, temperature);
II, insulation jar: Vt=V20*[1+3a (t-20)];
T-pot liquid medial temperature (℃).
Product oil of the present invention tank field intelligent measuring systems, wherein Computer Control Unit calculates the correction that oil tank volume also further increases the static pressure volume, and the modified value of described static pressure volume is the ratio that the volume modified value of corresponding level height multiply by pot liquid density and water-mass density.
Product oil of the present invention tank field intelligent measuring systems, wherein Computer Control Unit calculates the density of oil in the oil tank and is: ρ 20=ρ 20 bases+[(on the ρ 20-ρ 20 bases)/(ρ ' on the t-ρ ' t yl)] (ρ ' t survey-ρ ' t yl) wherein: the pseudodensity value that ρ ' t surveys-records;
Identical ρ ' the t value of value is carried with table in ρ ' t base-measured value tenths to thousand minute position;
On the ρ ' t-contiguous and greater than ρ ' the t value of ρ ' t base
Basic corresponding ρ 20 values of ρ 20 bases-ρ ' t;
On the ρ 20-last corresponding ρ 20 values of ρ ' t;
Product oil of the present invention tank field intelligent measuring systems, wherein Computer Control Unit calculating tank volume is: V20=Vt*VCF
Wherein Vt is non-standard volume; VCF is the volume modified value; The V20 standard volume.
Product oil of the present invention tank field intelligent measuring systems, wherein the quality of oil is in the Computer Control Unit calculating oil tank: m=V20* (ρ 20-1.1) (vertical metal tank)
V20＝Vt[1+a(t-20)]VCF
Wherein: ρ 20 is a standard density;
T is the mean value of jar inside and outside wall temperature, i.e. t=(t1+t2)/2, and wherein t1 be a jar interior oil metering temperature, t2 is the outer temperature of jar;
Vt is the volume number of jar interior oil product liquid level change;
VCF is the volume correction factor of jar interior oil product;
V20 is the actual volume of jar interior oil product.
A kind of product oil of the present invention tank field intelligent measuring systems that uses is measured the method that oil quality changes, and step is as follows:
1. the liquid level change of oil product in the measurement tank body, the volume number that obtains changing;
2. the apparent temperature of oil product in the measurement tank body, pseudodensity obtains out the standard density of oil product;
3. obtain its volume correction factor according to standard density and measurement temperature by correcting device;
4. converse its standard volume according to standard volume correction factor and standard density:
V20＝Vt[1+a(t-20)]VCF
One jar of material linear expansion coefficient of a; Vt is non-standard volume; VCF is the volume modified value; The V20 standard volume.
5. according to standard volume, standard density and airborne mass conversion formula thereof calculate its standard quality
6. formula is as follows:
m＝V20*(ρ20-1.1)
＝Vt*(1+a(t-20))*VCF*(ρ20-1.1)
Advantage of the present invention and good effect are, can realize the real-time monitoring to oil tank, and measured data are compensated and corrected, and make other physical quantity that calculates more accurate.
Description of drawings
Fig. 1 is the block scheme of product oil of the present invention tank field intelligent measuring systems.
Embodiment
Product oil of the present invention tank field intelligent measuring systems comprises the measurement mechanism that is used for real-time image data, and this measurement mechanism comprises magnetostriction liquidometer and temperature sensor, is used to measure oil level and and temperature.Data collector receives the data gathered and the data of these collections is revised, and described correction to data is the correction that the oil level by oil tank equipment just changes and the sedimentation of ground is carried out.All data that main control unit is used for the data collector that will obtain send computing machine to; Computer Control Unit is used for calculating according to measured data, obtains the tank farm stock of oil product and to the data in real time monitoring of tank field.
Product oil of the present invention tank field intelligent measuring systems, wherein Computer Control Unit calculates oil tank volume, the density of oil product, the volume of oil product and the quality of oil product.
Illustrate the modification method of described liquid level instrument measurement data below, this method has guaranteed the degree of accuracy of data
The modification method of data collector is the key that greatly guarantees the image data accuracy, can guarantee the liquid level error of positive and negative 1mm now, considerably beyond the precision of artificial one-level dipping.
Corrected parameter just changes according to oil tank equipment oil level, because problem such as ground, when causing high liquid level, a jar middle part, the end sinks into concavity; During low oil level, a jar end projection is taper.Many oil tanks detection platform of design specialized not under the manual inspection hole.Also along with the jar distortion, the detection reference face also rises thereupon or descends floor detection point, causes the manual inspection distortion, thereby very big with the liquid level instrument value of the reading contrast that is contained in tank deck.The way that addresses this problem is exactly with manual inspection hole check point, and under different liquid levels, the deflection at the bottom of surveying out jar is surveyed a numerical value for every meter generally speaking.In use, every meter mediant is by interpolation calculation.The actual measurement of the measuring point deformation of bottom amount of each oil tank needs considerable time at the jar of going into operation.Requirement obtains the unification of manual inspection and automatic gauge, then the actual measurement deflection is accomplished to compensate in the computer software.
The purpose that the oil operator adorns the liquid level instrument is to calculate the goods entry, stock and sales oil mass by liquid level instrument and loading table, reaches oil mass is monitored in real time.The user with the metering of orthobaric volume jar, can utilize the high precision of standard can and the loading table of an actual measurement of high-precision liquid level instrument indicating value establishment when oil-feed.All errors are revised.As: the loading table error that the volume-variation error of tank bottom deformation, former craft are made.
The practical operation way is as follows:
Calculate the following trapped fuel amount of 0.5m with former loading table when low oil level, the height of record liquid level instrument and the oil inlet quantity of relative height in the every rising 0.5m～1m of liquid level instrument, are made once record during each oil-feed.As long as can be from 0.5m to the oil tank overall height 85% write down 10～20 groups of data and just can utilize calculated with mathematical model to go out actual loading table, the logging data acquisition controller just can accurately calculate the oil storage capability of relative liquid level.As: the precision of test tank is 0.1% o'clock, and revised loading table maximum error can not surpass 0.3%, satisfies relevant national standard.
1, the measurement of vertical metal tank volume
Capacity when this capacities chart is depicted as 20 ℃.Use can be calculated as follows in the time of t ℃
(1), non-insulation jar:, Vt:=V20*[1+2a (t-20)]
Annotate: dip stick should carry out the temperature correction
One jar of material linear expansion coefficient of a is got a=0.0000121C;
T=(t oil+t gas)/2;
Fluid injection temperature in one jar of the t oil: the mean value of empty around one jar in the t gas, temperature);
(2), insulation jar: Vt=V20*[1+3a (t-20)];
T-pot liquid medial temperature (℃).
Jar in volume and its in have outside the Pass temperature.
When considering that static pressure is to volume, the density calculation that water is pressed by its correction chart system should be multiply by the volume modified value under the corresponding height ratio of pot liquid density and water-mass density earlier during use, and will take advantage of the result join in the volume shown in the loading table.
For example: when the height of oil product in the tank body was 5.555m, the standard density in the time of 20 ℃ can be defaulted as 0.9g/cm
3
The vertical metal strapping table
Jar number: 1# fluid density: 0000g/cm
3With reference to height: 15.611m
| Highly | Capacity | Highly | Capacity | Highly | Capacity |
| 5.10 5.11 5.12 5.13 5.14 5.15 5.16 5.17 | 839.778 841.431 843.084 844.737 846.390 848.044 849.697 851.350 | 5.50 5.51 5.52 5.53 5.54 5.55 5.56 5.57 | 905.904 907.557 909.210 910.863 912.516 914.170 915.823 917.476 | 5.90 5.91 5.92 5.93 5.94 5.95 5.96 5.97 | 972.030 * 973.683 * 975.336 * 976.989 * 978.642 * 980.295 * 981.949 * 983.602 * |
The millimeter capacities chart
(4.800m-5.999m)
| (mm) | (kL) |
| 1 2 3 4 5 6 7 8 9 | 0.165 0.331 0.496 0.661 0.827 0.992 1.157 1.322 1.488 |
Vertical metal tank static pressure correction chart
Jar number: 1# fluid density: 1g/cm
3With reference to height: 15.611m
| Highly | Capacity | Highly | Capacity | Highly | Capacity |
| 1.40 1.50 1.60 | 0.016 0.019 0.021 | 5.40 5.50 5.60 | 0.241 0.250 0.259 | 9.40 9.50 9.60 | 0.730 0.746 0.761 |
The first step: the program process of tabling look-up is, selects " vertical metal strapping table " 1# tank body loading table to look into 5.55m and highly is 914.170kL, and be 0.827kL looking into little table 5mm, inquiring about " vertical metal tank static pressure correction chart " 5.50m then is 0.250kL.
Second step: calculate.The little+⊿ V water * P20 of V=V master+V
V＝914.170+0.827+0.250×0.9
＝914.997+0.2250
＝915.222
Wherein said vertical metal strapping table and vertical metal tank static pressure correction chart have been stored in the computing machine, and computing machine calculates the volume through compensation according to the level height of measuring.
2, the conversion of 20 ℃ of standard densities
The calculating of 20 ℃ of standard densities is according to the accurate 91-2 of State Standard of the People's Republic of China GB/T 1885-1998 " petroleum meter scale " adopting by equivalent international standard; The technology contents of 1991 " oil scale second portion: with 20 ℃ are the table of standard temperature ", result of calculation and ISO91-2; 1991 unanimities.
Pressing the oil product of being surveyed (crude oil, product, lubricating oil) directly looks into and gets the corresponding standard density meter.Table 59D's here according to table 59B product standard density meter.Carry out program inquiring and calculating thereof.
The measurement unit of 59B product standard density conversion table is k/m
3
Calculation procedure:
1. the pseudodensity of known certain oil product under a certain test temperature select the standard density table of corresponding oil product according to the oil product classification; 2. determine between the density region in the standard density table of pseudodensity place; 3. in the pseudodensity hurdle, search known pseudodensity value; In temperature columns, find known test temperature value.The crossing number of this pseudodensity value and test temperature value is the standard density of oil product; If known pseudodensity value just in time in the pseudodensity hurdle between two adjacent pseudodensity values, then can adopt the interpolation method density that settles the standard, but test temperature value interpolation is not tabled look-up with more approaching temperature value.4. end product remains into position very much.
Adopt the close method of pseudodensity interpolation test temperature to try to achieve, its formula is
ρ 20=ρ 20 bases+[(on the ρ 20-ρ 20 bases)/(ρ ' on the t-ρ ' t yl)] (ρ ' t survey-ρ ' t yl)
The pseudodensity value that ρ ' t surveys-records;
Identical ρ ' the t value of value is carried with table in ρ ' t base-measured value tenths to thousand minute position;
On the ρ ' t-contiguous and greater than ρ ' the t value of ρ ' t base
Basic corresponding ρ 20 values of ρ 20 bases-ρ ' t;
On the ρ 20-last corresponding ρ 20 values of ρ ' t;
3, the conversion of 20 ℃ of standard volumes
Oil standard volume (V20) is that to be non-standard volume (Vt) with volume modified value (VCF) multiply each other obtains according to the volume tabular value.That is: V20=Vt*VCF.
Calculation procedure:
The standard density of known certain oil product converses this oil product and is adapted to the volume correction factor of standard volume from the metering temperature lower volume, 1. selects the volume correction factor table of corresponding oil product according to the oil product classification; Between the density region in the volume correction factor table of the density that 2. settles the standard place; 3. in the standard density hurdle, search known standard density value, find the metering temperature value of oil product in temperature columns, both crossing numbers are this oil product is adapted to standard temperature from metering temperature volume correction factor; If known standard density between the two adjacent standard densities, then can adopt interpolation method to determine its volume correction factor in the standard density row.Temperature value is only tabled look-up with more approaching temperature value without interpolation.4. end product remain into ten very much the position.
Computing formula is as follows:
The VCF=VCF base+[(on the VCF-the VCF yl)/(on the ρ 20-ρ 20 bases)] * (ρ 20 survey-ρ 20 bases);
The standard density value that ρ 20 surveys-provides;
ρ 20 tenths of ρ 20 bases-provide are to a position and table year identical ρ 20 values of value very much;
On the ρ 20-close on and greater than ρ 20 values of ρ 20 bases;
On the VCF-ρ 20 on corresponding VCF.
Give an example one:
Known ρ 20=0.7180g/cm
3, oil volume is 385467L in the time of t=29.5 ℃, asks VCF and calculates this oil V20;
Check in t=29.5 ℃ and ρ 20=0.7180g/cm
3Intersect to such an extent that VCF is 0.98780;
V20＝385467*0.98780＝380764；
Wherein VCF volume correction chart has been stored in the computing machine, and computing machine calculates the standard volume through compensation according to the oil product actual volume of measuring.
4, the calculating of oil quality in the tank body
Use product oil of the present invention tank field intelligent measuring systems to measure the method that oil quality changes, step is as follows:
Measure the liquid level change of oil product in the tank body, the volume number that obtains changing;
Measure the apparent temperature of oil product in the tank body, pseudodensity obtains out the standard density of oil product;
Obtain its volume correction factor according to standard density and measurement temperature by correcting device;
Converse its standard volume according to standard volume correction factor and standard density:
V20＝Vt[1+a(t-20)]VCF；
One jar of material linear expansion coefficient of a; Vt is non-standard volume; VCF is the volume modified value; The V20 standard volume;
According to standard volume, standard density and airborne mass conversion formula thereof calculate its standard quality;
Formula is as follows:
m＝V20*(ρ20-1.1)
＝Vt*(1+a(t-20))*VCF*(ρ20-1.1)
Example is as follows:
No. 90 gasoline of No. 1 vertical metal tank storage, paying the preceding original liquid level of oil is 5.432m, and the liquid level behind pair oil is 4.453m, and the laboratory records ρ 24.3=0.7208g/cm
3, t=24.0 ℃, ask the quality of the oil of this volume.
Record: apparent temperature: 24.3 ℃, pseudodensity is 720.8kg/M
3, metering temperature is 24.0 ℃, original liquid level 5.432m, and new liquid level is 4.453.
Selecting the 1# jar is its test tank.
Program calculates 20 ℃ of standard densities; 724.5999, revise volume factor: 0.994899, revise volume: 161.0689, changeable volume: 161.8946, it is 161.8946kg that actual computation goes out quality.
Claims (10)
1. product oil tank field intelligent measuring systems is comprising the measurement mechanism that is used for real-time image data; Be used to receive data of being gathered and the data collector that the data of these collections are revised; All data that main control unit is used for the data collector that will obtain send computing machine to; Computer Control Unit is used for calculating according to measured data, obtains the tank farm stock of oil product and to the data in real time monitoring of tank field.
2. product oil according to claim 1 tank field intelligent measuring systems, the measurement mechanism that wherein is used for real-time image data comprises magnetostriction liquidometer and temperature sensor, is used to measure oil level and and temperature.
3. product oil of the present invention according to claim 1 and 2 tank field intelligent measuring systems, wherein data collector is the correction that oil level by oil tank equipment just changes and the sedimentation of ground is carried out to the correction of measurement data.
4. product oil according to claim 3 tank field intelligent measuring systems, wherein Computer Control Unit calculates oil tank volume, the density of oil product, the volume of oil product and the quality of oil product.
5. product oil according to claim 3 tank field intelligent measuring systems, wherein Computer Control Unit calculates oil tank volume:
I, non-insulation jar:, Vt:=V20*[1+2a (t-20)];
Annotate: dip stick should carry out the temperature correction;
V20 is the actual volume of jar interior oil product;
A: jar material linear expansion coefficient, get a=0.0000121C;
T=(t oil+t gas)/2; T oil: fluid injection temperature in jar: t gas: the mean value of sky, temperature around jar);
II, insulation jar: Vt=V20*[1+3a (t-20)];
T: the pot liquid medial temperature (℃).
6. product oil according to claim 3 tank field intelligent measuring systems, wherein Computer Control Unit calculates the correction that oil tank volume also further increases the static pressure volume, and the modified value of described static pressure volume is the ratio that the volume modified value of corresponding level height multiply by pot liquid density and water-mass density.
7. product oil according to claim 3 tank field intelligent measuring systems, wherein Computer Control Unit calculates the density of oil in the oil tank and is: ρ 20=ρ 20 bases+[(on the ρ 20-ρ 20 bases)/(ρ ' on the t-ρ ' t yl)] (ρ ' t survey-ρ ' t yl);
Wherein: the pseudodensity value that ρ ' t survey-records;
Identical ρ ' the t value of value is carried with table in ρ ' t base-measured value tenths to thousand minute position;
On the ρ ' t-contiguous and greater than ρ ' the t value of ρ ' t base;
Basic corresponding ρ 20 values of ρ 20 bases-ρ ' t;
On the ρ 20-last corresponding ρ 20 values of ρ ' t.
8. product oil according to claim 3 tank field intelligent measuring systems, wherein Computer Control Unit calculating tank volume is: V20=Vt*VCF;
Wherein Vt is non-standard volume; VCF is the volume modified value; The V20 standard volume.
9. product oil according to claim 3 tank field intelligent measuring systems, wherein the quality of oil is in the Computer Control Unit calculating oil tank: m=V20* (ρ 20-1.1) (vertical metal tank);
V20＝Vt[1+a(t-20)]VCF；
Wherein: ρ 20 is a standard density;
T is the mean value of jar inside and outside wall temperature, i.e. t=(t1+t2)/2, and wherein t1 be a jar interior oil metering temperature, t2 is the outer temperature of jar;
Vt is the volume number of jar interior oil product liquid level change;
VCF is the volume correction factor of jar interior oil product;
V20 is the actual volume of jar interior oil product.
10. one kind is used product oil of the present invention tank field intelligent measuring systems to measure the method that oil quality changes, and step is as follows:
The liquid level change of oil product in I, the measuring tank body, the volume number that obtains changing;
The apparent temperature of oil product in II, the measuring tank body, pseudodensity obtains out the standard density of oil product;
III, according to standard density with measure temperature and obtain its volume correction factor by correcting device;
IV, converse its standard volume according to standard volume correction factor and standard density:
V20＝Vt[1+a(t-20)]VCF；
A: jar material linear expansion coefficient; Vt is non-standard volume; VCF is the volume modified value; The V20 standard volume;
V, according to standard volume, standard density and airborne mass conversion formula thereof calculate its standard quality;
VI, formula are as follows:
m＝V20*(ρ20-1.1)；
＝Vt*(1+a(t-20))*VCF*(ρ20-1.1)。
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| CN1049975C (en) * | 1995-01-28 | 2000-03-01 | 安徽省石油总公司芜湖公司 | Automatic storage volume measuring system and method for oil tank |
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| CN102133982A (en) * | 2011-01-27 | 2011-07-27 | 陆春红 | Full-function metering and alarming system of oil tank |
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