CN114593369A - Cutting method and device for mixed oil of finished oil - Google Patents
Cutting method and device for mixed oil of finished oil Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/03—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of several different products following one another in the same conduit, e.g. for switching from one receiving tank to another
Abstract
The invention discloses a method and a device for cutting mixed oil of finished oil, wherein the method comprises the following steps: determining the length of a first mixed oil section when the mixed oil to be cut is located at the mileage position of the interface detection system by using the detection data of the mixed oil interface detection system, and drawing a first mixed oil concentration change curve; taking the length of the first mixed oil section and a first mixed oil concentration change curve as initial state conditions, and predicting the length of a second mixed oil section and a second mixed oil concentration change curve after the mixed oil section reaches a receiving station; determining the cutting time of the oil mixing head and the cutting time of the oil mixing tail corresponding to the required cutting concentration according to the oil mixing cutting concentration and the second oil mixing concentration change curve; and performing oil mixing cutting according to the cutting time of the oil mixing head and the cutting time of the oil mixing tail. The invention provides an economical, efficient and practical cutting method for the oil mixing section with small density difference, converts the concentration representation of the oil mixing cutting node into the time point representation, solves the influence of the detection time difference of non-real-time detection equipment, and has better field operation performability.
Description
Technical Field
The invention relates to the field of oil conveying pipeline conveying processes, in particular to a method and a device for cutting mixed oil of finished oil.
Background
At present, almost all product oil pipelines adopt a sequential conveying mode to carry out oil product transportation, and adjacent front/rear oil products of different batches and models are bound to generate mixed oil under the influence of convection and diffusion transfer in the sequential conveying process. And the oil product receiving station needs to detect the oil mixing interface, cut the oil mixing section and receive the oil products into the front/rear oil product pure oil tank and the oil mixing tank. Most of the current methods for detecting the oil mixing interface utilize the density difference of adjacent oil products and adopt a densimeter to perform real-time online detection, but the method is suitable for oil mixing sections with large density difference and is difficult to detect oil products with similar densities, such as 92 gasoline/gasoline blending component oil and 95 gasoline or aviation kerosene/diesel oil. For the oil mixing interface with small density difference, although the oil mixing interface is detected by adopting a near infrared spectrum analysis method in the prior art, how to guide oil mixing cutting after the oil mixing interface is detected by the method is not described, and the practical operation feasibility is lacked.
Disclosure of Invention
Aiming at the problems in the prior art, the embodiment of the invention provides a method and a device for cutting mixed oil of product oil.
Specifically, the embodiment of the invention provides the following technical scheme:
in a first aspect, an embodiment of the present invention provides a method for cutting mixed oil from product oil, where a density difference is smaller than a preset threshold, where the method includes:
determining the mileage position of a mixed oil interface detection system positioned upstream of a receiving station;
determining the length of a first mixed oil section when the mixed oil to be cut is positioned at the mileage position of an interface detection system by using the detection data of the mixed oil interface detection system, and drawing a first mixed oil concentration change curve, wherein the abscissa of the first mixed oil concentration change curve is the mixed oil concentration percentage, and the ordinate of the first mixed oil concentration change curve is the time for the mixed oil to be cut to pass through the mixed oil interface detection system;
taking the length of the first mixed oil section and the first mixed oil concentration change curve as initial state conditions, and predicting the length of a second mixed oil section and a second mixed oil concentration change curve obtained after the mixed oil section undergoes development change from the mileage position to a receiving station;
determining the cutting time of the oil mixing head and the cutting time of the oil mixing tail corresponding to the required cutting concentration according to the required oil mixing cutting concentration and the second oil mixing concentration change curve;
and performing oil mixing cutting according to the cutting time of the oil mixing head and the cutting time of the oil mixing tail.
Further, the determining the mileage position of the oil mixing interface detection system located upstream of the receiving station specifically includes:
determining the maximum oil mixing length according to the historical operation data of the pipeline;
converting the maximum oil mixing length into the maximum oil mixing station passing time expressed by time according to the actual measurement flow corresponding to the maximum oil mixing length;
determining the maximum sampling number according to the maximum oil mixing station passing time and the sampling frequency;
determining the distance from the oil mixing interface detection system to a receiving station according to the preset design flow, the maximum sampling number, the pipeline cross-sectional area and the detection time of the detection equipment;
and determining the mileage position of the oil mixing interface detection system positioned at the upstream of the receiving station according to the distance.
Further, carry out the miscella cutting according to miscella head cutting time and miscella tail cutting time, specifically include:
inputting the oil before the cutting time of the oil mixing head into the first oil tank, inputting the oil between the cutting time of the oil mixing head and the cutting time of the oil mixing tail into the oil mixing tank, and inputting the oil after the cutting time of the oil mixing tail into the second oil tank.
Further, carry out the miscella cutting according to miscella cutting time and miscella tail cutting time, specifically include:
and determining the mixed oil amount cut into the mixed oil tank according to the cutting time of the mixed oil head, the cutting time of the mixed oil tail and the average value of the actual oil flow detected by the flow meter of the receiving station.
In a second aspect, the present embodiment further provides a finished oil mixed oil cutting device for the cutting of the finished oil mixed oil with the density difference smaller than the preset threshold, including:
the first determination module is used for determining the mileage position of a mixed oil interface detection system positioned upstream of a receiving station;
the second determining module is used for determining the length of a first mixed oil section when the mixed oil to be cut is located at the mileage position of the interface detection system by using the detection data of the mixed oil interface detection system, and drawing a first mixed oil concentration change curve, wherein the abscissa of the first mixed oil concentration change curve is the mixed oil concentration percentage, and the ordinate of the first mixed oil concentration change curve is the time when the mixed oil to be cut passes through the mixed oil interface detection system;
the prediction module is used for taking the length of the first oil blending section and the first oil blending concentration change curve as initial state conditions, and predicting the length of a second oil blending section and the second oil blending concentration change curve which are obtained after the oil blending section undergoes development change from the mileage position to a receiving station;
the third determining module is used for determining the cutting time of the oil mixing head and the cutting time of the oil mixing tail corresponding to the required cutting concentration according to the required oil mixing cutting concentration and the second oil mixing concentration change curve;
and the oil mixing cutting module is used for carrying out oil mixing cutting according to the cutting time of the oil mixing head and the cutting time of the oil mixing tail.
Further, the first determining module is specifically configured to:
determining the maximum oil mixing length according to the historical operation data of the pipeline;
converting the maximum oil mixing length into the maximum oil mixing station passing time expressed by time according to the actual measurement flow corresponding to the maximum oil mixing length;
determining the maximum sampling number according to the maximum oil mixing station passing time and the sampling frequency;
determining the distance from the oil mixing interface detection system to a receiving station according to the preset design flow, the maximum sampling number, the pipeline cross-sectional area and the detection time of the detection equipment;
and determining the mileage position of the oil mixing interface detection system according to the distance.
Further, the oil mixing and cutting module is specifically used for:
inputting the oil before the cutting time of the oil mixing head into the first oil tank, inputting the oil between the cutting time of the oil mixing head and the cutting time of the oil mixing tail into the oil mixing tank, and inputting the oil after the cutting time of the oil mixing tail into the second oil tank.
Further, the miscella cutting module specifically is used for:
and determining the mixed oil amount cut into the mixed oil tank according to the cutting time of the mixed oil head, the cutting time of the mixed oil tail and the average value of the actual oil flow detected by the flow meter of the receiving station.
In a third aspect, an embodiment of the present invention further provides an electronic device, which includes a memory, a processor, and a computer program stored on the memory and executable on the processor, where the processor executes the computer program to implement the method for cutting the product oil mixture according to the first aspect.
In a fourth aspect, the present invention further provides a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the product oil-mixed oil cutting method according to the first aspect.
It can be known from the above technical solutions that the method and apparatus for cutting mixed oil of finished oil provided in the embodiments of the present invention are used for cutting mixed oil of finished oil with a density difference smaller than a preset threshold, and the method and apparatus are implemented by first determining a mileage position of a mixed oil interface detection system located upstream of a receiving station, then determining a first mixed oil segment length when the mixed oil to be cut is located at the mileage position of the interface detection system by using detection data of the mixed oil interface detection system, and drawing a first mixed oil concentration change curve, where an abscissa of the first mixed oil concentration change curve is a mixed oil concentration percentage, and an ordinate is a time when the mixed oil to be cut passes through the mixed oil interface detection system, then using the first mixed oil segment length and the first mixed oil concentration change curve as initial state conditions, and predicting a second mixed oil segment length and a second mixed oil concentration change curve obtained after the mixed oil segment undergoes a development change from the mileage position to the receiving station, and then determining the cutting time of the oil mixing head and the cutting time of the oil mixing tail corresponding to the required cutting concentration according to the required oil mixing cutting concentration and the second oil mixing concentration change curve, and finally performing oil mixing cutting according to the cutting time of the oil mixing head and the cutting time of the oil mixing tail. It can be understood that, when the mixed oil with small density difference is detected on the mixed oil interface, the real-time on-line detection can not be performed by a densimeter, but the detection is usually performed by a near infrared spectrum analysis method or other methods, because the detection methods can not obtain the processing result in real time, and the influence of the detection time difference is caused, when the mixed oil interface with small density difference is detected, the advanced detection is required to be performed at the upstream position of the receiving station, but the influence factors of non-real time and the position of the non-receiving station are detected in advance, the invention aims to overcome the factors, converts the mixed oil cutting node from the concentration or density representation into the time point representation, reasonably predicts the mixed oil concentration change curve of the corresponding mixed oil section when the mixed oil section reaches the receiving station by adopting a prediction means, and further determines the mixed oil head cutting time and the mixed oil tail cutting time corresponding to the required cutting concentration according to the predicted mixed oil concentration change curve, and finally, mixed oil cutting is carried out according to the cutting time of the mixed oil head and the cutting time of the mixed oil tail, so that the influence of the detection time difference of non-real-time detection equipment can be solved, the field practical operation performability is better, and the technical problem that the mixed oil cutting cannot be conveniently and accurately carried out at present is solved. Therefore, the embodiment of the invention provides specific operably-implemented mixed oil cutting means, which comprises means for determining the mileage position of a mixed oil interface detection system located at the upstream of a receiving station, means for converting the concentration or density representation of a mixed oil cutting node into a time point representation, means for predicting the length of a second mixed oil section and the change curve of the second mixed oil concentration after reaching the receiving station, and the like. Therefore, the embodiment of the invention provides an economic, efficient and practical cutting method for the oil mixing section with small density difference, converts the oil mixing cutting node from the concentration or density representation into the time point representation, solves the influence of the detection time difference of non-real-time detection equipment, has better field actual operation performability, and solves the technical problem that the oil mixing cutting cannot be conveniently and accurately carried out at present.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is also possible for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a flow chart of a method for cutting a product oil mixture according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a product oil blending cutting device according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
The following further describes embodiments of the present invention with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
The invention aims to provide a method and a device for cutting mixed oil of finished oil, which are used for detecting a mixed oil interface between adjacent oil products and cutting an oil mixing section economically and safely in the process of sequential delivery of a finished oil pipeline. The method and the device for cutting the mixed oil of the product oil provided by the invention are explained in detail by the specific embodiments.
Fig. 1 shows a flowchart of a finished oil mixed oil cutting method according to an embodiment of the present invention, and as shown in fig. 1, the finished oil mixed oil cutting method according to the embodiment of the present invention is used for cutting a finished oil mixed oil with a density difference smaller than a preset threshold, and specifically includes the following steps:
step 101: determining the mileage position of a mixed oil interface detection system positioned upstream of a receiving station;
in this step, the oil mixing interface detection system may include an interface detection device, a pressure control device, a pipeline, and a safety protection device. The oil mixing interface detection system is arranged on an oil pipeline in a side branch pipe mode. The mixed oil interface detection system is disposed upstream of the receiving station, and is located at a distance from the receiving station, and the distance may be determined by an empirical value or by a processing method described in the following embodiments.
In this step, the interface detection device may adopt an on-line sulfur content detection device, a near-infrared spectrometer, and the like, and the device selection should be performed specifically by detecting the type of the oil-mixing interface as required.
In the step, the data acquisition system acquires detection data of the interface detection system and transmits the detection data to the computing system through the signal transmission system, the computing system is arranged in a receiving station control room, and the computing system automatically processes and analyzes the detection data of the interface detection system and gives an oil mixing and cutting scheme.
Step 102: determining the length of a first mixed oil section when the mixed oil to be cut is located at the mileage position of the interface detection system by using the detection data of the mixed oil interface detection system, and drawing a first mixed oil concentration change curve, wherein the abscissa of the first mixed oil concentration change curve is the mixed oil concentration percentage, and the ordinate is the time for the mixed oil to be cut to pass through the mixed oil interface detection system;
in this step, the execution main body may be a computing system located in the control room of the receiving station, the computing system automatically processes and analyzes the detection data of the interface detection system, and gives the oil blending cutting scheme, and the specific method is as follows: calculating the length of the mixed oil section when the mixed oil is positioned at the mileage position of the interface detection system by using the detection data of the interface detection system, drawing a mixed oil concentration change curve, wherein the abscissa of the curve is the mixed oil concentration percentage, and the ordinate of the curve is the time for the mixed oil to pass through the mixed oil interface detection system, then using the obtained mixed oil length and mixed oil concentration change curve as initial state conditions, and predicting and calculating the mixed oil length and mixed oil concentration change curve of the mixed oil section after the development change of L mileage according to a common empirical formula or an intelligent algorithm. The L range here refers to the distance from the range position where the interface detection system is located to the receiving yard.
In this embodiment, it should be noted that the method for cutting mixed oil of product oil provided in this embodiment is mainly used for cutting mixed oil of product oil with density difference smaller than a preset threshold, whereThe preset threshold value can be 5kg/m3。
It can be understood that, when the mixed oil with small density difference is detected on the mixed oil interface, the real-time on-line detection can not be performed by a densimeter, but the detection is usually performed by a near infrared spectrum analysis method or other methods, because the detection methods can not obtain the processing result in real time, and the influence of the detection time difference is caused, when the mixed oil interface with small density difference is detected, the advanced detection is required to be performed at the upstream position of the receiving station, but the influence factors of non-real time and the position of the non-receiving station are detected in advance, the invention aims to overcome the factors, converts the mixed oil cutting node from the concentration or density representation into the time point representation, reasonably predicts the mixed oil concentration change curve of the corresponding mixed oil section when the mixed oil section reaches the receiving station by adopting a prediction means, and further determines the mixed oil head cutting time and the mixed oil tail cutting time corresponding to the required cutting concentration according to the predicted mixed oil concentration change curve, and finally, mixed oil cutting is carried out according to the cutting time of the mixed oil head and the cutting time of the mixed oil tail, so that the influence of the detection time difference of non-real-time detection equipment can be solved, the field practical operation performability is better, and the technical problem that the mixed oil cutting cannot be conveniently and accurately carried out at present is solved. It can be understood that the invention point of the present application lies in skillfully drawing a first mixed oil concentration change curve, that is, the present application skillfully associates the percentage of the mixed oil concentration with the time of the mixed oil to be cut passing through the mixed oil interface detection system, so that the cut concentration of the mixed oil can be converted into a cutting time point corresponding to cutting according to the required cut concentration of the mixed oil, thereby making mixed oil cutting operable, and meanwhile, after drawing the mixed oil concentration change curve, a new mixed oil change curve of the mixed oil concentration change curve after reaching a receiving station yard can be predicted by using prediction means such as empirical values, thereby solving the influence of the detection time difference of non-real-time detection equipment, making the field practical operation performability better, and further well solving the technical problem that the mixed oil cutting cannot be conveniently and accurately performed at present.
Step 103: taking the length of the first mixed oil section and the first mixed oil concentration change curve as initial state conditions, and predicting the length of a second mixed oil section and a second mixed oil concentration change curve obtained after the mixed oil section undergoes development change from the mileage position to a receiving station;
in this step, the length of the first mixed oil segment and the first mixed oil concentration change curve obtained in step 102 are used as initial state conditions, and the second mixed oil length and the second mixed oil concentration change curve of the mixed oil segment after the development change of the L mileage can be predicted and calculated in the following manner.
The second oil mixing length calculation formula is as follows:
the second mixed oil concentration change curve formula is as follows:
wherein: c is the length of the second mixed oil; c0The length of the first mixed oil is; c is a second oil mixing length without considering the first oil mixing length; l is the mileage of the oil mixing interface detection system from the destination receiving station; z is a concentration corresponding value of the symmetrically cut oil mixing head; pedIs the Beckley number; d is the inner diameter of the pipeline; re is Reynolds number; alpha is a correction coefficient; kAIs the concentration percentage of the mixed oil; tau is a time ratio; phi is a function, and the calculation result can be obtained by looking up a table.
It should be noted that the first mixed oil length and the first mixed oil concentration change curve are corresponding situations of mixed oil when the L mileage is upstream of the receiving station, and the second mixed oil length and the second mixed oil concentration change curve are corresponding situations of mixed oil when the mixed oil reaches the receiving station, so that the mixed oil head cutting time and the mixed oil tail cutting time corresponding to the required cutting concentration can be determined subsequently according to the required mixed oil cutting concentration and the second mixed oil concentration change curve.
Step 104: determining the cutting time of the oil mixing head and the cutting time of the oil mixing tail corresponding to the required cutting concentration according to the required oil mixing cutting concentration and the second oil mixing concentration change curve;
in this step, according to the required oil-mixing cutting concentration, the second oil-mixing concentration variation curve obtained in step 103 is compared to find out the oil-mixing head cutting time and the oil-mixing tail cutting time corresponding to the required cutting concentration. For example, the cutting time point T of the oil blending head is obtained by comparing the second oil blending concentration change curve obtained in step 103 with 95% and 5% as the oil blending cutting concentration1And mixed oil tail cutting time point T2。
Step 105: and performing oil mixing cutting according to the oil mixing head cutting time and the oil mixing tail cutting time.
In this step, the oil mixture cutting can be performed according to the cutting time of the oil mixture head and the cutting time of the oil mixture tail obtained in step 104. For example, the oil before the cutting time of the mixed oil head is input into the first oil tank, the oil between the cutting time of the mixed oil head and the cutting time of the mixed oil tail is input into the mixed oil tank, and the oil after the cutting time of the mixed oil tail is input into the second oil tank. For another example, the amount of blended oil V cut into the blended oil tank can also be determined according to the cutting time of the blended oil head, the cutting time of the blended oil tail and the average value Q of the actual oil flow detected by the flow meter of the receiving station, for example, V ═ T (T ═ T)2-T1)×Q。
It can be known from the above technical solutions that the method for cutting the mixed oil of the finished oil provided in the embodiments of the present invention includes determining a mileage position of an oil mixing interface detection system, determining a first mixed oil length when the mixed oil to be cut is located at the mileage position of the interface detection system by using detection data of the oil mixing interface detection system, drawing a first mixed oil concentration change curve, taking an abscissa of the first mixed oil concentration change curve as a mixed oil concentration percentage and an ordinate as a time when the mixed oil to be cut passes through the oil mixing interface detection system, predicting a second mixed oil length and a second mixed oil concentration change curve obtained after the mixed oil section undergoes development and change from the mileage position to a receiving station, and then according to a required mixed oil cutting concentration and the second mixed oil concentration change curve, and determining the cutting time of the oil mixing head and the cutting time of the oil mixing tail corresponding to the required cutting concentration, and finally, performing oil mixing cutting according to the cutting time of the oil mixing head and the cutting time of the oil mixing tail. Therefore, the embodiment of the invention provides specific oil mixing and cutting means which can be operated and implemented, and the specific oil mixing and cutting means comprises means for determining the mileage position of an oil mixing interface detection system, means for converting the concentration or density representation of an oil mixing and cutting node into a time point representation, means for predicting the length of a second oil mixing section and the change curve of the second oil mixing concentration after the oil mixing and cutting node arrives at a receiving station, and the like. Therefore, the embodiment of the invention provides an economic, efficient and practical cutting method for the oil mixing section with small density difference, converts the oil mixing cutting node from the concentration or density representation into the time point representation, solves the influence of the detection time difference of non-real-time detection equipment, has better field actual operation performability, and solves the technical problem that the oil mixing cutting cannot be conveniently and accurately carried out at present.
Based on the content of the foregoing embodiment, in this embodiment, the determining the mileage position of the oil mixing interface detection system located upstream of the receiving yard specifically includes:
determining the maximum oil mixing length according to the historical operation data of the pipeline;
converting the maximum oil mixing length into the maximum oil mixing station passing time expressed by time according to the actual measurement flow corresponding to the maximum oil mixing length;
determining the maximum sampling number according to the maximum oil mixing station passing time and the sampling frequency;
determining the distance from the oil mixing interface detection system to a receiving station according to the preset design flow, the maximum sampling number, the pipeline cross-sectional area and the detection time of the detection equipment;
and determining the mileage position of the oil mixing interface detection system positioned at the upstream of the receiving station according to the distance.
In this embodiment, the oil mixing interface detection system is disposed at the upstream of the receiving station, and is a certain distance mileage from the receiving station, and the specific distance mileage can be calculated in the following manner:
A. finding out the maximum oil mixing length according to the historical operation data of the pipeline;
B. converting the maximum oil mixing length into the maximum oil mixing station passing time T expressed by time by using the actually measured flow corresponding to the maximum oil mixing length;
C. the maximum sampling number n is related to the maximum oil mixing station passing time T obtained in the step 2 and the sampling frequency H, and n is T/H;
D. distance receiving station mileage L-QDesign ofA x n x t, wherein QDesign ofDesigning flow for a pipeline, wherein A is the sectional area of the pipeline, and t is the detection time of detection equipment;
wherein, the (oil mixing) detection equipment has the capabilities of continuous sampling and continuous detection, and the detection time is less than or equal to 2 min.
In this embodiment, it should be noted that the method provided in this embodiment can reasonably determine the mileage position of the oil blending interface detection system, where the mileage position can meet the actual operation requirement, and can obtain the first oil blending section length and the first oil blending concentration change curve having a reference meaning, so as to lay a foundation for accurate segmentation of subsequent oil blending.
Based on the content of the above embodiment, in this embodiment, the oil blending cutting is performed according to the cutting time of the oil blending head and the cutting time of the oil blending tail, which specifically includes:
inputting the oil before the cutting time of the oil mixing head into the first oil tank, inputting the oil between the cutting time of the oil mixing head and the cutting time of the oil mixing tail into the oil mixing tank, and inputting the oil after the cutting time of the oil mixing tail into the second oil tank.
Therefore, the oil mixing head cutting time and the oil mixing tail cutting time can accurately cut the oil mixing of two kinds of pure oil and the boundary position, and the whole processing mode is simple, convenient and accurate.
Based on the content of the above embodiment, in this embodiment, the oil blending cutting is performed according to the cutting time of the oil blending head and the cutting time of the oil blending tail, which specifically includes:
and determining the mixed oil amount cut into the mixed oil tank according to the cutting time of the mixed oil head, the cutting time of the mixed oil tail and the average value of the actual oil flow detected by the flow meter of the receiving station.
In this embodiment, the oil blending amount to be cut into the oil blending tank is determined according to the cutting time of the oil blending head, the cutting time of the oil blending tail and the average value of the actual oil flow detected by the flow meter of the receiving station, so that the oil blending amount to be entered into the oil blending tank can be known in advance, and the oil blending tank with the corresponding capacity can be prepared in advance.
In order to better understand the present invention, the following examples are further provided to illustrate the content of the present invention, but the present invention is not limited to the following examples.
The whole length of a certain finished oil pipeline is 200 kilometers, the inner diameter of the pipeline is 300mm, the gasoline component oil of No. 95 and No. 92 are sequentially conveyed, and the designed flow of the pipeline is 350m3H, actual flow rate 320m3And h, receiving the mixed oil at a terminal station, wherein the terminal station is provided with a mixed oil tank, a No. 95 gasoline tank and a No. 92 gasoline component oil tank.
The interface detection device of the interface detection system is an internal infrared spectrometer, the interface detection device is a near infrared spectrometer, the oxygen content of the mixed oil of No. 95 gasoline and No. 92 gasoline component oil is detected, the detection time of a sample is controlled to be 2min by limiting the wavelength range, the sample is placed at the position L kilometers upstream of a destination receiving station, and the calculation process of L is as follows:
1. analyzing according to the historical data of the pipeline operation to obtain the maximum oil mixing length;
2. converting the maximum oil mixing length into a time expression, wherein the time for the section to pass through a destination receiving station is 30 min;
3. the sampling frequency is 1 min/piece, and the maximum sampling number n is 30;
4. design flow rate Q is 350m3H, pipeline sectional area A is 0.25 pi d2＝0.07m2And the detection time is 2min, and the distance L between the station and the receiving station is QDesign of/A×n×t＝4.97km。
The data acquisition system and the signal transmission system transmit the detection data back to the terminal receiving station computing system, and the computing system automatically analyzes and calculates the data and provides a receiving scheme, wherein the specific method comprises the following steps:
converting the detection data of the oxygen content of the mixed oil into the mixed oil concentration according to a linear relation, calculating the length of the mixed oil to be 2000m, the abscissa of a mixed oil concentration curve is concentration percentage, and the ordinate is the time point of the mixed oil passing through the mileage of an interface detection system, wherein the accuracy is up to minutes;
taking the mixed oil length of 2000m and the mixed oil concentration curve obtained in the above step as initial conditions, and predicting and calculating the mixed oil length increase of 2150m after the mixed oil section is transported by a 4.76km pipe by using a common empirical formula, wherein the time represented by the abscissa of the mixed oil concentration curve is increased;
taking 95% and 5% as the cutting concentration of the mixed oil, and contrasting the predicted concentration curve of the mixed oil to obtain a cutting time point T1 of the mixed oil head and a cutting time point T2 of the mixed oil tail;
the average value Q of the actual oil flow detected by the inlet and the outlet of the receiving station is 320m3The amount of oil mixture V cut into the oil-mixed tank was calculated, and the amount of oil mixture V calculated in this example was 53m3。
During actual operation, at T1Before the time point, the oil product enters a No. 95 gasoline tank T2To T1Oil entering the tank mix between time points, T2Then the oil product enters a No. 92 gasoline component oil tank.
The oil product mixed oil cutting method provided by the embodiment provides an economic, efficient and practical cutting method for the oil mixed section with small density difference, converts the mixed oil cutting node into time point representation from concentration or density representation, solves the influence of non-real-time detection equipment detection time difference, and has better field actual operation performability.
Fig. 2 is a schematic structural diagram of a finished oil mixed oil cutting device according to an embodiment of the present invention, and as shown in fig. 2, the finished oil mixed oil cutting device according to the embodiment of the present invention is used for cutting finished oil mixed oil with a density difference smaller than a preset threshold, and includes: a first determination module 21, a second determination module 22, a prediction module 23, a third determination module 24, and a blended oil cutting module 25, wherein:
the first determination module 21 is configured to determine a mileage position of the oil mixing interface detection system;
the second determining module 22 is configured to determine, by using detection data of the oil blending interface detection system, a length of a first oil blending section of the oil blending to be cut located at a mileage position of the interface detection system, and draw a first oil blending concentration change curve, where an abscissa of the first oil blending concentration change curve is a percentage of oil blending concentration, and an ordinate of the first oil blending concentration change curve is time for the oil blending to be cut to pass through the oil blending interface detection system;
the prediction module 23 is configured to predict a second mixed oil length and a second mixed oil concentration change curve, which are obtained after the mixed oil section undergoes development and change from the mileage location to the receiving yard, by using the first mixed oil length and the first mixed oil concentration change curve as initial state conditions;
the third determining module 24 is configured to determine, according to the required oil mixing cutting concentration and the second oil mixing concentration variation curve, oil mixing head cutting time and oil mixing tail cutting time corresponding to the required cutting concentration;
and the oil mixing cutting module 25 is used for performing oil mixing cutting according to the cutting time of the oil mixing head and the cutting time of the oil mixing tail.
Based on the content of the foregoing embodiment, in this embodiment, the first determining module is specifically configured to:
determining the maximum oil mixing length according to the historical operation data of the pipeline;
converting the maximum oil mixing length into the maximum oil mixing station passing time expressed by time according to the actual measurement flow corresponding to the maximum oil mixing length;
determining the maximum sampling number according to the maximum oil mixing station passing time and the sampling frequency;
determining the distance from the oil mixing interface detection system to a receiving station according to the preset design flow, the maximum sampling number, the pipeline cross-sectional area and the detection time of the detection equipment;
and determining the mileage position of the oil mixing interface detection system according to the distance.
Based on the content of the foregoing embodiment, in this embodiment, the oil mixing and cutting module is specifically configured to:
inputting the oil before the cutting time of the oil mixing head into the first oil tank, inputting the oil between the cutting time of the oil mixing head and the cutting time of the oil mixing tail into the oil mixing tank, and inputting the oil after the cutting time of the oil mixing tail into the second oil tank.
Based on the content of the foregoing embodiment, in this embodiment, the oil mixing and cutting module is specifically configured to:
and determining the mixed oil amount cut into the mixed oil tank according to the cutting time of the mixed oil head, the cutting time of the mixed oil tail and the average value of the actual oil flow detected by the flow meter of the receiving station.
Because the finished oil mixed oil cutting device provided by the embodiment can be used for executing the finished oil mixed oil cutting method provided by the embodiment, the working principle and the beneficial effect are similar, and the detailed description is omitted here.
Based on the same inventive concept, another embodiment of the present invention provides an electronic device, which specifically includes the following components, with reference to fig. 3: a processor 301, a memory 302, a communication interface 303, and a communication bus 304;
the processor 301, the memory 302 and the communication interface 303 complete mutual communication through the communication bus 304; the communication interface 303 is used for realizing information transmission between the devices;
the processor 301 is configured to call a computer program in the memory 302, and when the processor executes the computer program, the processor implements all the steps of the above-mentioned finished oil mixing and cutting method, for example, when the processor executes the computer program, the processor implements the following steps: determining the mileage position of the oil mixing interface detection system; determining the length of a first mixed oil section when the mixed oil to be cut is located at the mileage position of the interface detection system by using the detection data of the mixed oil interface detection system, and drawing a first mixed oil concentration change curve, wherein the abscissa of the first mixed oil concentration change curve is the mixed oil concentration percentage, and the ordinate is the time for the mixed oil to be cut to pass through the mixed oil interface detection system; taking the length of the first mixed oil section and the first mixed oil concentration change curve as initial state conditions, and predicting the length of a second mixed oil section and a second mixed oil concentration change curve obtained after the mixed oil section undergoes development change from the mileage position to a receiving station; determining the cutting time of the oil mixing head and the cutting time of the oil mixing tail corresponding to the required cutting concentration according to the required oil mixing cutting concentration and the second oil mixing concentration change curve; and performing oil mixing cutting according to the cutting time of the oil mixing head and the cutting time of the oil mixing tail.
Based on the same inventive concept, another embodiment of the present invention provides a non-transitory computer-readable storage medium, on which a computer program is stored, which when executed by a processor implements all the steps of the above-mentioned finished oil-mixed oil cutting method, for example, the processor implements the following steps when executing the computer program: determining the mileage position of the oil mixing interface detection system; determining the length of a first mixed oil section when the mixed oil to be cut is located at the mileage position of the interface detection system by using the detection data of the mixed oil interface detection system, and drawing a first mixed oil concentration change curve, wherein the abscissa of the first mixed oil concentration change curve is the mixed oil concentration percentage, and the ordinate is the time for the mixed oil to be cut to pass through the mixed oil interface detection system; taking the length of the first oil blending section and the change curve of the first oil blending concentration as initial state conditions, and predicting the length of a second oil blending section and the change curve of the second oil blending concentration, which are obtained after the oil blending section undergoes development change from the mileage position to a receiving station; determining the cutting time of the oil mixing head and the cutting time of the oil mixing tail corresponding to the required cutting concentration according to the required oil mixing cutting concentration and the second oil mixing concentration change curve; and performing oil mixing cutting according to the oil mixing head cutting time and the oil mixing tail cutting time.
In addition, the logic instructions in the memory may be implemented in the form of software functional units and may be stored in a computer readable storage medium when sold or used as a stand-alone product. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the embodiments of the present invention. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. Based on such understanding, the technical solutions mentioned above may be embodied in the form of a software product, which may be stored in a computer-readable storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the finished oil mixing and cutting method according to various embodiments or some portions of embodiments.
In addition, in the present invention, terms such as "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Moreover, in the present invention, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Furthermore, in the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A cutting method of mixed oil of finished oil is characterized in that the cutting method is used for cutting the mixed oil of the finished oil with the density difference smaller than a preset threshold value, and comprises the following steps:
determining the mileage position of a mixed oil interface detection system positioned upstream of a receiving station;
determining the length of a first mixed oil section when the mixed oil to be cut is located at the mileage position of the interface detection system by using the detection data of the mixed oil interface detection system, and drawing a first mixed oil concentration change curve, wherein the abscissa of the first mixed oil concentration change curve is the mixed oil concentration percentage, and the ordinate is the time for the mixed oil to be cut to pass through the mixed oil interface detection system;
taking the length of the first oil blending section and the change curve of the first oil blending concentration as initial state conditions, and predicting the length of a second oil blending section and the change curve of the second oil blending concentration, which are obtained after the oil blending section undergoes development change from the mileage position to a receiving station;
determining the cutting time of the oil mixing head and the cutting time of the oil mixing tail corresponding to the required cutting concentration according to the required oil mixing cutting concentration and the second oil mixing concentration change curve;
and performing oil mixing cutting according to the cutting time of the oil mixing head and the cutting time of the oil mixing tail.
2. The method for cutting mixed oil of finished oil according to claim 1, wherein the determining the mileage position of the mixed oil interface detection system located upstream of the receiving station specifically comprises:
determining the maximum oil mixing length according to the historical operation data of the pipeline;
converting the maximum oil mixing length into maximum oil mixing station passing time expressed by time according to the actual measurement flow corresponding to the maximum oil mixing length;
determining the maximum sampling number according to the maximum oil mixing station passing time and the sampling frequency;
determining the distance from the oil mixing interface detection system to a receiving station according to the preset design flow, the maximum sampling number, the pipeline cross-sectional area and the detection time of the detection equipment;
and determining the mileage position of the oil mixing interface detection system according to the distance.
3. The finished oil mixed oil cutting method according to claim 1, wherein the mixed oil cutting is performed according to mixed oil head cutting time and mixed oil tail cutting time, and specifically comprises the following steps:
inputting the oil before the cutting time of the oil mixing head into the first oil tank, inputting the oil between the cutting time of the oil mixing head and the cutting time of the oil mixing tail into the oil mixing tank, and inputting the oil after the cutting time of the oil mixing tail into the second oil tank.
4. The product oil mixing cutting method according to claim 1, wherein the oil mixing cutting is performed according to oil mixing head cutting time and oil mixing tail cutting time, and specifically comprises:
and determining the mixed oil amount cut into the mixed oil tank according to the cutting time of the mixed oil head, the cutting time of the mixed oil tail and the average value of the actual oil flow detected by the flow meter of the receiving station.
5. The utility model provides a finished product oil mixes oil cutting device which characterized in that for the cutting is mixed to finished product oil that density difference is less than preset threshold value, include:
the first determination module is used for determining the mileage position of a mixed oil interface detection system positioned upstream of a receiving station;
the second determining module is used for determining the length of a first mixed oil section when the mixed oil to be cut is located at the mileage position of the interface detection system by using the detection data of the mixed oil interface detection system, and drawing a first mixed oil concentration change curve, wherein the abscissa of the first mixed oil concentration change curve is the mixed oil concentration percentage, and the ordinate of the first mixed oil concentration change curve is the time when the mixed oil to be cut passes through the mixed oil interface detection system;
the prediction module is used for taking the length of the first oil blending section and the first oil blending concentration change curve as initial state conditions, and predicting the length of a second oil blending section and the second oil blending concentration change curve which are obtained after the oil blending section undergoes development change from the mileage position to a receiving station;
the third determining module is used for determining the cutting time of the oil mixing head and the cutting time of the oil mixing tail corresponding to the required cutting concentration according to the required oil mixing cutting concentration and the second oil mixing concentration change curve;
and the oil mixing cutting module is used for carrying out oil mixing cutting according to the cutting time of the oil mixing head and the cutting time of the oil mixing tail.
6. The finished oil miscella cutting apparatus of claim 5, wherein the first determining module is specifically configured to:
determining the maximum oil mixing length according to the historical operation data of the pipeline;
converting the maximum oil mixing length into maximum oil mixing station passing time expressed by time according to the actual measurement flow corresponding to the maximum oil mixing length;
determining the maximum sampling number according to the maximum oil mixing station passing time and the sampling frequency;
determining the distance from the oil mixing interface detection system to a receiving station according to the preset design flow, the maximum sampling number, the pipeline cross-sectional area and the detection time of the detection equipment;
and determining the mileage position of the oil mixing interface detection system according to the distance.
7. The finished oil miscella cutting apparatus of claim 5, wherein the miscella cutting module is specifically configured to:
inputting the oil before the cutting time of the oil mixing head into the first oil tank, inputting the oil between the cutting time of the oil mixing head and the cutting time of the oil mixing tail into the oil mixing tank, and inputting the oil after the cutting time of the oil mixing tail into the second oil tank.
8. The finished oil miscella cutting apparatus of claim 5, wherein the miscella cutting module is specifically configured to:
and determining the mixed oil amount cut into the mixed oil tank according to the cutting time of the mixed oil head, the cutting time of the mixed oil tail and the average value of the actual oil flow detected by the flow meter of the receiving station.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor executes the computer program to implement the method of any one of claims 1 to 4.
10. A non-transitory computer readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the method of any one of claims 1 to 4.
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