CN116410772A - Crude oil distillation cutting method, device, equipment and storage medium - Google Patents

Crude oil distillation cutting method, device, equipment and storage medium Download PDF

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CN116410772A
CN116410772A CN202111677778.2A CN202111677778A CN116410772A CN 116410772 A CN116410772 A CN 116410772A CN 202111677778 A CN202111677778 A CN 202111677778A CN 116410772 A CN116410772 A CN 116410772A
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crude oil
physical properties
secondary processing
group
processing device
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CN116410772B (en
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王杭州
纪晔
杨诗棋
王弘历
石振民
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Petrochina Co Ltd
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Petrochina Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10GCRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G7/00Distillation of hydrocarbon oils
    • C10G7/12Controlling or regulating
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/30Computing systems specially adapted for manufacturing

Abstract

The present disclosure relates to the field of petroleum processing technologies, and in particular, to a method, an apparatus, a device, and a storage medium for crude oil distillation and cutting. The method comprises the following steps: according to preset fraction cutting parameters, carrying out simulated distillation on crude oil to obtain a plurality of groups of side-stream fractions; determining physical properties of each set of side streams according to the single molecules and the content of the single molecules contained in each set of side streams; judging whether the physical properties of each group of side line fractions meet the feeding requirements of the secondary processing device: if yes, outputting current fraction cutting parameters to be applied to an actual crude oil distillation process; if not, the current distillate cutting parameters are adjusted, and the steps of carrying out simulated distillation on crude oil to obtain a plurality of groups of side-stream distillates are executed according to the adjusted distillate cutting parameters until the physical properties of each group of side-stream distillates meet the feeding requirements of the secondary processing device. The crude oil fraction cutting parameters are optimized by simulating the crude oil distillation cutting experimental process, so that the time cost and the labor cost are saved.

Description

Crude oil distillation cutting method, device, equipment and storage medium
Technical Field
The present disclosure relates to the field of petroleum processing technologies, and in particular, to a method, an apparatus, a device, and a storage medium for crude oil distillation and cutting.
Background
In oil refining processes, secondary processing (e.g., reforming, catalytic, coking, hydrogenation) units typically have limitations on the feed: for example, there are restrictions on the sulfur (S) content and the carbon residue content. However, since the crude oil contains a large number of molecular species, when different side products distilled from the crude oil are fed as secondary processing units by utilizing the difference in boiling points of the components in the crude oil, there are cases where the feeding requirements of the secondary processing units are not satisfied.
In addition, because of the problem of overlapping distillation ranges among different components in crude oil, the situation that the separation precision of different side products distilled from crude oil is not high easily occurs, so that the components of the side products fed by the secondary processing device cannot be determined, and whether the side products fed by the secondary processing device meet the feeding requirements of the secondary processing device cannot be determined.
Disclosure of Invention
In order to solve the problems of the prior art, at least one embodiment of the present specification provides a crude oil distillation cutting method, apparatus, device, and storage medium.
In a first aspect, embodiments of the present specification provide a crude oil distillation cut method comprising:
According to preset current fraction cutting parameters, performing simulated distillation on crude oil to obtain a plurality of groups of side-stream fractions;
determining physical properties of each group of side streams according to single molecules and the content of single molecules contained in each group of side streams based on a pre-trained physical property calculation model;
judging whether the physical properties of each group of side line fractions meet the feeding requirements of the secondary processing device:
outputting current distillate cutting parameters when the physical properties of each group of side-cut distillate meet the feeding requirements of the secondary processing device, and applying the current distillate cutting parameters to an actual crude oil distillation process;
when the physical properties of any group of side line fractions do not meet the feeding requirements of the secondary processing device, the current fraction cutting parameters are adjusted, and the step of obtaining a plurality of groups of side line fractions by carrying out simulated distillation on crude oil according to the adjusted fraction cutting parameters is carried out until the physical properties of each group of side line fractions meet the feeding requirements of the secondary processing device.
Based on the above technical solutions, the embodiments of the present specification may further make the following modifications.
In one possible implementation, the adjusting the current fraction cutting parameter includes:
determining an unsatisfied constraint index in the feed demand of the secondary processing device;
and adjusting the current fraction cutting parameter according to the unsatisfied limiting index.
In one possible implementation, the type of feed limitation indicator of the secondary processing device includes feed quality and process capacity.
In one possible implementation of the method according to the invention,
the feed quality comprises at least one of the following constraints:
the distillation range of the side stream fed by the secondary processing device is in a preset distillation range threshold range;
the content of specified elements and/or specified structural groups in the side stream fed by the secondary processing device is smaller than a preset content threshold value;
the specified physical property data of the side stream fed by the secondary processing device is within the preset physical property data threshold value range.
In a possible implementation, the single molecule and the content of single molecules contained in each set of side streams are determined by the steps comprising:
acquiring each single molecule and the content of each single molecule in crude oil based on a pre-constructed crude oil molecular database;
and determining the single molecules and the content of the single molecules contained in each group of side-cut lines according to the boiling point and the content of each single molecule in the crude oil based on a pre-constructed distillation cutting model.
In one possible implementation, the boiling point of each single molecule is obtained by:
obtaining, for each of the single molecules, the number of groups of each group constituting the single molecule, and obtaining a contribution value of each of the groups to a boiling point;
Inquiring the consistency molecules in a real molecule database, extracting corresponding boiling point data if unique real molecules exist, otherwise, inputting the number of groups of each group forming the single molecule and the contribution value of each group to the boiling point into a physical property calculation model trained in advance, and obtaining the boiling point of the single molecule output by the physical property calculation model.
In one possible implementation, determining the physical properties of each set of side-cuts from the single molecules and the content of single molecules contained in each set of side-cuts based on a pre-trained physical property calculation model, comprises:
calculating to obtain each single molecule physical property of each single molecule based on a physical property calculation model trained in advance;
according to the preset mixing rule of the physical properties of each mixture, calculating the physical properties of each side stream of each group through the physical properties and the content of each single molecule.
In one possible implementation, the secondary processing unit includes at least one of a catalytic reformer, a catalytic cracker, a hydrocracker, a delayed coker, and a resid hydrotreater, wherein the feed requirement of each of the secondary processing units corresponds to a side stream that is the feed to the secondary processing unit.
In one possible implementation, determining whether the physical properties of each set of side streams meet the feed requirements of the secondary processing device includes:
for each set of side cuts, determining whether the physical properties of the set of side cuts meet the feed requirements of the secondary processing device corresponding to the set of side cuts:
when the physical properties of all side-cut streams meet the feeding requirements of the secondary processing device corresponding to the respective side-cut streams, judging that the physical properties of each group of side-cut streams meet the feeding requirements of the secondary processing device;
when the physical properties of any one of the side streams do not meet the feeding requirements of the secondary processing device corresponding to the side stream of the group, the physical properties of the side stream of the group are judged not to meet the feeding requirements of the secondary processing device.
In a second aspect, embodiments of the present disclosure provide a crude oil distillation cutting apparatus, the apparatus comprising:
the simulated distillation unit is used for performing simulated distillation on the crude oil according to preset current fraction cutting parameters to obtain a plurality of groups of side fractions;
a determining unit for determining physical properties of each set of side streams from single molecules and contents of single molecules contained in each set of side streams based on a physical property calculation model trained in advance;
The processing unit is used for judging whether the physical properties of each group of side streams meet the feeding requirements of the secondary processing device: outputting current distillate cutting parameters when the physical properties of each group of side-cut distillate meet the feeding requirements of the secondary processing device, and applying the current distillate cutting parameters to an actual crude oil distillation process; when the physical properties of any group of side line fractions do not meet the feeding requirements of the secondary processing device, the current fraction cutting parameters are adjusted, and the step of obtaining a plurality of groups of side line fractions by carrying out simulated distillation on crude oil according to the adjusted fraction cutting parameters is carried out until the physical properties of each group of side line fractions meet the feeding requirements of the secondary processing device.
In a possible implementation manner, the processing unit is further configured to:
determining an unsatisfied constraint index in the feed demand of the secondary processing device;
and adjusting the current fraction cutting parameter according to the unsatisfied limiting index.
In a possible implementation manner, the determining unit is further configured to:
acquiring each single molecule and the content of each single molecule in crude oil based on a pre-constructed crude oil molecular database;
and determining the single molecules and the content of the single molecules contained in each group of side-cut lines according to the boiling point and the content of each single molecule in the crude oil based on a pre-constructed distillation cutting model.
In a possible implementation manner, the determining unit is further configured to:
calculating to obtain each single molecule physical property of each single molecule based on a physical property calculation model trained in advance;
according to the preset mixing rule of the physical properties of each mixture, calculating the physical properties of each side stream of each group through the physical properties and the content of each single molecule.
In a third aspect, embodiments of the present disclosure provide a crude oil distillation cutting apparatus comprising a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other via the communication bus;
a memory for storing a computer program;
a processor for implementing the steps of the crude oil distillation cut method of the first aspect or any possible implementation of the first aspect when executing a program stored on a memory.
In a fourth aspect, embodiments of the present specification provide a computer readable storage medium storing one or more programs executable by one or more processors to implement steps of the crude oil distillation cut method of the first aspect or any possible implementation of the first aspect.
Compared with the prior art, the technical scheme of the specification has the following advantages:
according to the embodiment of the specification, according to preset fraction cutting parameters, crude oil is subjected to simulated distillation to obtain a plurality of groups of side fractions; determining physical properties of each group of side streams according to single molecules and the content of single molecules contained in each group of side streams based on a pre-trained physical property calculation model; judging whether the physical properties of each group of side line fractions meet the feeding requirements of the secondary processing device: outputting current distillate cutting parameters when the physical properties of each group of side-cut distillate meet the feeding requirements of the secondary processing device, and applying the current distillate cutting parameters to an actual crude oil distillation process; when the physical properties of any group of side line fractions do not meet the feeding requirements of the secondary processing device, the current fraction cutting parameters are adjusted, and the steps of carrying out simulated distillation on crude oil to obtain a plurality of groups of side line fractions are executed according to the adjusted fraction cutting parameters until the physical properties of each group of side line fractions meet the feeding requirements of the secondary processing device, the physical properties of each group of side line fractions obtained by the actual crude oil distillation process are realized by the fraction cutting parameters applied to the actual crude oil distillation process to meet the feeding requirements of the secondary processing device, and the production benefit is improved by carrying out simulated optimization on the actual crude oil distillation process.
Drawings
In order to more clearly illustrate the embodiments of the present description or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present description, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of a crude oil distillation cutting method according to an embodiment of the present disclosure.
Fig. 2 is a schematic flow chart of a crude oil distillation cutting method according to another embodiment of the present disclosure.
Fig. 3 is a schematic flow chart of a crude oil distillation cutting method according to another embodiment of the present disclosure.
Fig. 4 is a schematic flow chart of a crude oil distillation cutting method according to another embodiment of the present disclosure.
Fig. 5 is a schematic structural diagram of a crude oil distillation cutting device according to another embodiment of the present disclosure.
Fig. 6 is a schematic structural diagram of a crude oil distillation cutting apparatus according to another embodiment of the present disclosure.
[ reference numerals description ]
501. A simulated distillation unit;
502. A determination unit;
503. a processing unit;
802. a computing device;
804. a processing device;
806. storing the resource;
808. a driving mechanism;
810. an input/output module;
812. an input device;
814. an output device;
816. a presentation device;
818. a graphical user interface;
820. a network interface;
822. a communication link;
824. a communication bus.
Detailed Description
The technical solutions of the embodiments of the present specification will be clearly and completely described below with reference to the drawings in the embodiments of the present specification, and it is apparent that the described embodiments are only some embodiments of the present specification, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are intended to be within the scope of the present disclosure.
It should be noted that the terms "first," "second," and the like in the description and the claims of the specification and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the present description described herein may be capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, apparatus, article, or device that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed or inherent to such process, method, article, or device.
It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer executable instructions, and that although a logical order is illustrated in the flowcharts, in some cases the steps illustrated or described may be performed in an order other than that illustrated herein.
As shown in fig. 1, a crude oil distillation cutting method is provided in an embodiment of the present specification. Referring to fig. 1, the crude oil distillation cutting method includes:
step 101, performing simulated distillation on crude oil according to preset current fraction cutting parameters to obtain a plurality of groups of side fractions;
in this embodiment, the preset current fraction cutting parameter may be user-defined or set according to an empirical value. The preset cut parameters include the distillation ranges of the different side cuts, wherein the distillation ranges of the different side cuts include, but are not limited to, the following two groups: in the first group: the distillation ranges of the side stream fractions 1-5 are 0-50 ℃, 50-160 ℃, 160-220 ℃, 220-360 ℃ and >360 ℃ respectively; in the second group: the distillation ranges of the side stream fractions 1-5 are 0-50 ℃, 50-140 ℃, 140-200 ℃, 200-350 ℃ and >350 ℃ respectively. The temperature range of the distillation range in the embodiments of the present specification may or may not include the boundary value itself. The multiple groups of side line fractions comprise light distillate oil, heavy distillate oil and residual oil, wherein the heavy distillate oil and the residual oil are used as the feed materials of the secondary processing device.
Step 102, determining physical properties of each group of side-line fractions according to single molecules and the content of single molecules contained in each group of side-line fractions based on a pre-trained physical property calculation model;
in this embodiment, since the use of each of the plurality of sets of side streams obtained in step 101 is different, the use including feeding as the secondary processing device, and in practical use, the different sets of side streams correspond to feeding as different types of secondary processing devices, the physical properties of each set of side streams to be calculated are determined according to the feeding requirements of the secondary processing device corresponding to the side streams. Specifically, when the side stream corresponds to the feed as the catalytic reformer, since the feed requirement of the catalytic reformer is a feed distillation range of not more than 180 ℃, the aromatic hydrocarbon potential content in the feed is not more than 40%, the arsenic content is not more than 1PPb, the sulfur content is not more than 0.5wt-ppm, the nitrogen content is less than 0.5wt-ppm, the chloride is not more than 0.5wt-ppm, and the lead is not more than 20wt-PPb, the physical properties of the side stream set to be determined include: the distillation range, the potential aromatic hydrocarbon content, the sulfur content, the nitrogen content, the arsenic content, the lead content and the like are compared with the feeding requirements of the catalytic reforming device. Therefore, in this embodiment, the physical properties of the side stream fed to the catalytic reforming device, which need to be calculated, are determined according to the feeding requirements of the catalytic reforming device, and of course, the catalytic reforming device is only one type of secondary processing device, and the manner of determining the physical properties of the side stream corresponding to the other types of secondary processing devices is the same as that of the catalytic reforming device, and this is not described in detail.
Step 103, judging whether the physical properties of each group of side stream meet the feeding requirement of the secondary processing device:
if yes, go to step 104;
if not, go to step 105;
in this embodiment, the feed requirements of the secondary processing device include a feed quality and a processing capacity of the secondary processing device, and the feed requirements of the secondary processing device vary from one type of secondary processing device to another, wherein the feed quality includes, but is not limited to: when the secondary processing device is a reforming device, the feeding quality of the secondary processing device is that the distillation range is less than 180 degrees, and the like, so as to judge whether the distillation range of side line distillate fed by the reforming device is less than 180 degrees; when the secondary processing device is a catalytic cracking device, the feed quality of the secondary processing device is such that the carbon residue content is less than 5%, etc., to determine whether the carbon residue content of the side stream fed as the catalytic cracking device is less than 5%.
The processing capacity refers to the number of processing units that can be performed by the secondary processing device per unit time. The physical properties of the side stream are mainly compared with the feed quality of the secondary processing device, and the yield of the side stream is compared with the processing capacity, and the expected value is that the yield does not exceed the processing capacity.
Step 104, outputting current fraction cutting parameters, and applying the current fraction cutting parameters to an actual crude oil distillation process;
step 105, adjusting current cut parameters, and executing the step 101 of performing simulated distillation on crude oil to obtain a plurality of groups of side cuts according to the adjusted cut parameters until the physical properties of each group of side cuts meet the feeding requirement of the secondary processing device.
In this embodiment, as shown in fig. 2, step 102, the content of single molecules and single molecules contained in each set of side streams is determined by the steps comprising:
step 201, obtaining each single molecule and the content of each single molecule in crude oil based on a pre-constructed crude oil molecular database, wherein the pre-constructed crude oil molecular database comprises the molecular composition of crude oil and the macroscopic physical property of crude oil; further, the molecular composition of crude oil includes: the molecular species of crude oil and the content of each molecule; macroscopic physical properties of crude oil include: density, cloud point, pour point, aniline point, octane number, cetane number, congealing point, cold filtration point, flash point, etc.;
step 202, determining the single molecule and the content of the single molecule contained in each side stream according to the boiling point and the content of each single molecule in the crude oil based on a pre-constructed distillation cutting model.
In this example, the boiling point of each single molecule is obtained by:
obtaining, for each of the single molecules, the number of groups of each group constituting the single molecule, and obtaining a contribution value of each of the groups to a boiling point;
inquiring the consistency molecules in a real molecule database, extracting corresponding boiling point data if unique real molecules exist, otherwise, inputting the number of groups of each group forming the single molecule and the contribution value of each group to the boiling point into a physical property calculation model trained in advance, and obtaining the boiling point of the single molecule output by the physical property calculation model.
The consistency score refers to molecules with the same molecular structure, and known real molecules and various physical properties corresponding to the known real molecules are stored in a preset real molecule database.
In this embodiment, in the distillation cut model,
regarding two groups of side-cut fractions with adjacent distillation ranges, taking the side-cut fraction with higher distillation range temperature as a first fraction and taking the side-cut fraction with lower distillation range temperature as a second fraction;
and calculating the minimum value of the overlapping interval of the first fraction and the second fraction cutting parameters by the following formula:
T min =T cut ×(1-SF);
The maximum value of the overlapping interval of the first fraction and the second fraction is calculated by the following formula:
T max =T cut ×(1+SF);
wherein T is min Is the minimum value of the overlapping interval, T max T being the maximum value of the overlapping interval cut The distillation cut temperature for the first and second fractions, SF being the separation index of the first and second fractions;
and obtaining the overlapped interval according to the minimum value and the maximum value.
In this embodiment, in the distillation cut model,
according to the content of each single molecule and each single molecule corresponding to each boiling point of the overlapping interval, calculating to obtain the content of each single molecule distilled into the two groups of fractions in the overlapping interval;
wherein the content of each single molecule distilled into the two groups of fractions in the overlapping interval is calculated by the following formula:
Figure BDA0003452735710000091
Figure BDA0003452735710000092
wherein, the liquid crystal display device comprises a liquid crystal display device,
Figure BDA0003452735710000093
for the content of the i-th single molecule distilled into the first fraction with boiling point in the overlapping interval,
Figure BDA0003452735710000094
for the content of the second fraction distilled into the ith single molecule having a boiling point in the overlap interval, T i T being the boiling point of the ith single molecule min Is the minimum value of the overlapping interval, C i Content of the ith single molecule having a boiling point in the overlapping region;
And respectively distilling the single molecules with boiling points in the overlapping region into the content of the first fraction and the content of the second fraction to obtain the content of each single molecule in the first fraction and the second fraction and the content of each single molecule after the crude oil is distilled and cut.
In the present embodiment, determining the physical properties of each set of side streams from the single molecules and the content of single molecules contained in each set of side streams based on a physical property calculation model trained in advance, includes:
calculating to obtain each single molecule physical property of each single molecule based on a physical property calculation model trained in advance;
according to the preset mixing rule of the physical properties of each mixture, calculating the physical properties of each side stream of each group through the physical properties and the content of each single molecule.
In this embodiment, each single molecule physical property of each single molecule is calculated based on a physical property calculation model trained in advance, and the method includes:
inputting the number of groups of each group constituting the single molecule and the contribution value of each group to physical properties into a physical property calculation model trained in advance, and obtaining the physical properties of the single molecule output by the physical property calculation model.
In this embodiment, in order to quickly obtain each single molecular physical property of each single molecule, before calculating each single molecular physical property of each single molecule based on a physical property calculation model trained in advance, the method further includes:
Comparing the number of groups constituting each group of the single molecule with the molecular information of template single molecules with known physical properties prestored in a database; the molecular information includes: the number of groups of each group constituting the template single molecule;
judging whether the template single molecule which is the same as the single molecule exists or not;
outputting physical properties of the template single molecule as physical properties of the single molecule if the template single molecule identical to the single molecule exists;
and if the template single molecule which is the same as the single molecule does not exist, performing the steps of inputting the number of groups of each group which form the single molecule and the contribution value of each group to physical properties into a pre-trained physical property calculation model.
In this embodiment, the step of training the physical property calculation model includes:
constructing a single-molecule physical property calculation model, wherein the physical property calculation model is as follows:
Figure BDA0003452735710000101
wherein f is the physical property of the sample single molecule, n i The number of groups, Δf, being the i-th group i A is a correlation constant, which is a contribution value of the i-th group to the physical property;
obtaining the number of groups of each group constituting a single molecule of the sample; the physical properties of the sample single molecule are known;
Inputting the number of groups of each group contained in the sample single molecule into the physical property calculation model;
obtaining the predicted physical property of the sample single molecule output by the physical property calculation model;
if the deviation value between the predicted physical property and the known physical property is smaller than a preset deviation threshold value, judging that the physical property calculation model converges, acquiring a contribution value corresponding to each group in the converged physical property calculation model, and storing the contribution value as a contribution value of the group to the physical property;
and if the deviation value between the predicted physical property and the known physical property is greater than or equal to the deviation threshold value, adjusting the contribution value corresponding to each group in the physical property calculation model until the physical property calculation model converges.
In this embodiment, the obtaining the number of groups of each group constituting a single molecule of the sample includes:
determining a primary group, the number of groups of the primary group, a multi-stage group and the number of groups of the multi-stage group in all groups of the single molecule of the sample;
all groups constituting a single molecule are taken as primary groups;
a plurality of groups which are simultaneously present and contribute to the same physical property together are used as a multi-stage group, and the number of the plurality of groups is used as a grade of the multi-stage group.
According to the primary groups, the number of the primary groups, the multi-stage groups and the number of the multi-stage groups, a physical property calculation model shown as follows is established:
Figure BDA0003452735710000102
wherein f is the physical property of the sample single molecule, m 1i The number of groups, Δf, being the i-th group in the primary groups 1i Is the contribution value of the ith group in the primary groups to physical properties, m 2 j The number of groups, Δf, being the j-th group in the secondary groups 2j The contribution value of the j-th group in the secondary groups to physical properties; m is m Nl The number of groups, Δf, being the first group in the N-stage groups Nl The contribution value of the first group in the N-level groups to physical properties; a is a correlation constant; n is a positive integer greater than or equal to 2.
In this embodiment, the physical properties of the single molecule include: the boiling point of the single molecule;
the method for inputting the number of groups of each group constituting the single molecule and the contribution value of each group to physical properties into a physical property calculation model trained in advance to obtain physical properties of the single molecule output by the physical property calculation model comprises the steps of:
the boiling point of the single molecule was calculated according to the following physical property calculation model:
Figure BDA0003452735710000111
wherein T is the boiling point of the single molecule, SOL is a single molecule vector converted according to the number of GROUPs constituting each GROUP of the single molecule, GROUP 11 GROUP is a first contribution vector obtained by converting the contribution value of the primary GROUP to the boiling point 12 GROUP is a second contribution vector obtained by conversion of the contribution value of the secondary GROUP to the boiling point 1N Numh is the number of atoms except hydrogen atoms in single molecules, d is a first preset constant, b is a second preset constant and c is a third preset constant; and N is a positive integer greater than or equal to 2. Therefore, in this embodiment, the boiling point of the side stream is calculated by the above steps, and of course, the boiling point is only one of the physical properties of the side stream, and the calculation method is the same as the boiling point for the other physical properties, and this is not described in detail.
In this embodiment, as shown in fig. 3, in step 103, the secondary processing apparatus includes at least one of a catalytic reforming apparatus, a catalytic cracking apparatus, a hydrocracking apparatus, a delayed coking apparatus, and a residuum hydrogenation apparatus, wherein the feeding requirement of each secondary processing apparatus corresponds to a side stream that is fed by the secondary processing apparatus, and determining whether the physical properties of each group of side streams satisfy the feeding requirement of the secondary processing apparatus includes:
Step 301, for each group of side streams, determining whether the physical properties of the group of side streams satisfy the feeding requirements of the secondary processing device corresponding to the group of side streams:
if yes, go to step 302;
if not, go to step 303;
step 302, judging that the physical properties of each group of side line fractions meet the feeding requirement of a secondary processing device;
step 303, determining that the physical properties of the group of side streams do not meet the feeding requirements of the secondary processing device.
In this embodiment, as shown in fig. 4, in step 105, the adjusting the current fraction cutting parameter includes:
step 401, determining physical indexes which are not met in the feeding requirements of the secondary processing device;
and step 402, adjusting the current fraction cutting parameters according to the unsatisfied physical indexes.
In this embodiment, the types of the feed physical property indexes of the secondary processing device include feed quality and processing capacity.
In this embodiment, further, the feed quality comprises at least one of the following limitations:
the distillation range of the side stream fed by the secondary processing device is in a preset distillation range threshold range;
the content of specified elements and/or specified structural groups in the side stream fed by the secondary processing device is smaller than a preset content threshold value;
The specified physical property data of the side stream fed by the secondary processing device is within the preset physical property data threshold value range.
Correspondingly, adjusting the current cut parameters includes:
when the feed quality is that the distillation range of the distillate is in the distillation range threshold range, and when the distillation range of the side stream fed as the secondary processing device is beyond the distillation range threshold range, adjusting the distillate cutting point in the distillate cutting parameters so that the distillation range of at least one side stream is in the distillation range threshold range;
when the content of the specified element and/or the specified structural group is greater than or equal to the preset content threshold value, determining single molecules containing the specified element and/or the specified structural group, and adjusting a fraction cutting point in a fraction cutting parameter to reduce the content of the single molecules in the current side stream;
when the feeding quality is that the appointed physical property data is in the preset physical property data threshold range, determining single molecules contributing to the physical property when the appointed physical property of the side stream fed as the secondary processing device is not in the preset physical property data threshold range, and adjusting the fraction cutting point in the fraction cutting parameter to adjust the content of the single molecules in the current side stream;
When the total amount of the side stream fed as the secondary processing device exceeds the processing capacity of the secondary processing device, single molecules contained in the side stream are determined, and the cut point of the fraction in the cut parameter is adjusted to reduce the total amount of the current side stream.
According to the crude oil distillation cutting method, the distillate cutting parameters are adjusted according to whether the physical properties of the side stream meet the requirements of the secondary processing device, so that the distillate cutting parameters can be flexibly adjusted according to actual requirements, the problems that the side stream produced by the atmospheric and vacuum device is fixed, part of molecules in the side stream cannot meet the feeding requirements of the secondary processing device, or part of molecules in the side stream do not react in the secondary processing device and the like are avoided.
The crude oil distillation cutting method of the embodiment obtains molecular composition data of a side cut by using a pre-constructed distillation cutting model, and further checks and judges whether the feeding limit of a downstream device is met according to a side cut limit index obtained by prediction calculation, so as to determine whether the cutting parameter is suitable, if not, the cutting parameter is adjusted until the side cut limit index meets the feeding limit of the downstream device, and the cutting parameter is applied to an actual crude oil distillation process, so that when the side cut obtained by the actual crude oil distillation process is fed as a secondary processing device, the side cut meets the feeding requirement of the secondary processing device.
When the crude oil distillation cutting method of the embodiment adjusts the fraction cutting parameters, the cutting points are reversely pushed according to the unsatisfied limiting indexes in the feeding requirements of the secondary processing device, so that the proper fraction cutting parameters can be obtained quickly.
Based on the same description concept, as shown in fig. 5, the embodiment of the present description provides a crude oil distillation cutting device, the device includes: a simulated distillation unit 501, a determination unit 502 and a processing unit 503.
In this embodiment, the simulated distillation unit 501 is configured to perform simulated distillation on crude oil according to preset current fraction cutting parameters to obtain multiple groups of side-stream fractions.
In the present embodiment, the determining unit 502 is configured to determine the physical properties of each set of side streams from the single molecules and the content of single molecules contained in each set of side streams based on a physical property calculation model trained in advance.
In this embodiment, the processing unit 503 is configured to determine whether the physical properties of each group of side streams meet the feeding requirement of the secondary processing apparatus: outputting current distillate cutting parameters when the physical properties of each group of side-cut distillate meet the feeding requirements of the secondary processing device, and applying the current distillate cutting parameters to an actual crude oil distillation process; when the physical properties of any group of side line fractions do not meet the feeding requirements of the secondary processing device, the current fraction cutting parameters are adjusted, and the step of obtaining a plurality of groups of side line fractions by carrying out simulated distillation on crude oil according to the adjusted fraction cutting parameters is carried out until the physical properties of each group of side line fractions meet the feeding requirements of the secondary processing device.
In some embodiments, the processing unit 503 is further configured to perform the following steps:
determining an unsatisfied constraint index in the feed demand of the secondary processing device;
and adjusting the current fraction cutting parameter according to the unsatisfied limiting index.
In some embodiments, the type of feed limitation indicator of the secondary processing device includes feed quality and process capacity, wherein,
the feed quality comprises at least one of the following constraints:
the distillation range of the side stream fed by the secondary processing device is in a preset distillation range threshold range;
the content of specified elements and/or specified structural groups in the side stream fed by the secondary processing device is smaller than a preset content threshold value;
the specified physical property data of the side stream fed by the secondary processing device is within the preset physical property data threshold value range.
In some embodiments, the determining unit 502 is further configured to determine the single molecule and the content of single molecules contained in each set of side streams by:
acquiring each single molecule and the content of each single molecule in crude oil based on a pre-constructed crude oil molecular database;
and determining the single molecules and the content of the single molecules contained in each group of side-cut lines according to the boiling point and the content of each single molecule in the crude oil based on a pre-constructed distillation cutting model.
In some embodiments, the determining unit 502 is further configured to obtain the boiling point of each single molecule by:
obtaining, for each of the single molecules, the number of groups of each group constituting the single molecule, and obtaining a contribution value of each of the groups to a boiling point;
inquiring the consistency molecules in a real molecule database, extracting corresponding boiling point data if unique real molecules exist, otherwise, inputting the number of groups of each group forming the single molecule and the contribution value of each group to the boiling point into a physical property calculation model trained in advance, and obtaining the boiling point of the single molecule output by the physical property calculation model.
In some embodiments, the determining unit 502 is further configured to perform the following steps:
calculating to obtain each single molecule physical property of each single molecule based on a physical property calculation model trained in advance;
according to the preset mixing rule of the physical properties of each mixture, calculating the physical properties of each side stream of each group through the physical properties and the content of each single molecule.
In some embodiments, in the processing unit 503, the secondary processing units include at least one of a catalytic reformer, a catalytic cracker, a hydrocracker, a delayed coker, and a resid hydrotreater, wherein the feed requirements of each of the secondary processing units correspond to a side draw as feed to the secondary processing unit.
In some embodiments, the processing unit 503 is further configured to perform the following steps:
for each set of side cuts, determining whether the physical properties of the set of side cuts meet the feed requirements of the secondary processing device corresponding to the set of side cuts:
when the physical properties of all side-cut streams meet the feeding requirements of the secondary processing device corresponding to the respective side-cut streams, judging that the physical properties of each group of side-cut streams meet the feeding requirements of the secondary processing device;
when the physical properties of any one of the side streams do not meet the feeding requirements of the secondary processing device corresponding to the side stream of the group, the physical properties of the side stream of the group are judged not to meet the feeding requirements of the secondary processing device.
The implementation process of the functions and roles of each unit in the above device is specifically shown in the implementation process of the corresponding steps in the above method, and will not be described herein again.
For the device embodiments, reference is made to the description of the method embodiments for the relevant points, since they essentially correspond to the method embodiments. The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purposes of the present description. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
As shown in fig. 6, which is a schematic structural diagram of a crude oil distillation cutting apparatus according to an embodiment of the present disclosure, the methods in the above embodiments may be executed on a computer in the present embodiment, which is referred to as a computing apparatus in the present embodiment, and the computing apparatus 802 may include one or more processing apparatuses 804, such as one or more Central Processing Units (CPUs), each of which may implement one or more hardware threads. Computing device 802 may also include any storage resources 806 for storing any kind of information, such as code, settings, data, etc. For example, and without limitation, storage resources 806 may include any one or more of the following combinations: any type of RAM, any type of ROM, flash memory devices, hard disks, optical disks, etc. More generally, any storage resource may store information using any technology. Further, any storage resource may provide volatile or non-volatile retention of information. Further, any storage resources may represent fixed or removable components of computing device 802. In one case, when processing device 804 executes associated instructions stored in any storage resource or combination of storage resources, computing device 802 may perform any of the operations of the associated instructions. The computing device 802 also includes one or more drive mechanisms 808, such as a hard disk drive mechanism, an optical disk drive mechanism, and so forth, for interacting with any storage resources.
Computing device 802 may also include an input/output module 810 (I/O) for receiving various inputs (via input device 812) and for providing various outputs (via output device 814)). One particular output mechanism may include a presentation device 816 and an associated Graphical User Interface (GUI) 818. Computing device 802 may also include one or more network interfaces 820 for exchanging data with other devices via one or more communication links 822. One or more communications buses 824 couple the above-described components together.
The communication link 822 may be implemented in any manner, such as, for example, through a local area network, a wide area network (e.g., the internet), a point-to-point connection, etc., or any combination thereof. Communication link 822 may include any combination of hardwired links, wireless links, routers, gateway functions, name servers, etc., governed by any protocol or combination of protocols.
The embodiments of the present specification also provide a computer device including a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor implementing the following steps when executing the computer program:
according to preset current fraction cutting parameters, performing simulated distillation on crude oil to obtain a plurality of groups of side-stream fractions;
Determining physical properties of each group of side streams according to single molecules and the content of single molecules contained in each group of side streams based on a pre-trained physical property calculation model;
judging whether the physical properties of each group of side line fractions meet the feeding requirements of the secondary processing device:
outputting current distillate cutting parameters when the physical properties of each group of side-cut distillate meet the feeding requirements of the secondary processing device, and applying the current distillate cutting parameters to an actual crude oil distillation process;
when the physical properties of any group of side line fractions do not meet the feeding requirements of the secondary processing device, the current fraction cutting parameters are adjusted, and the step of obtaining a plurality of groups of side line fractions by carrying out simulated distillation on crude oil according to the adjusted fraction cutting parameters is carried out until the physical properties of each group of side line fractions meet the feeding requirements of the secondary processing device.
The computer device provided in the embodiments of the present description may also implement the methods as in fig. 1-4.
Corresponding to the method in fig. 1-4, the present description also provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the above method.
The present description also provides computer-readable instructions, wherein the program therein causes the processor to perform the method of fig. 1-4 when the processor executes the instructions.
It should be understood that, in various embodiments of the present disclosure, the sequence numbers of the foregoing processes do not mean the order of execution, and the order of execution of the processes should be determined by the functions and internal logic thereof, and should not constitute any limitation on the implementation of the embodiments of the present disclosure.
It should also be understood that, in the embodiments of the present specification, the term "and/or" is merely one association relationship describing the association object, meaning that three relationships may exist. For example, a and/or B may represent: a exists alone, A and B exist together, and B exists alone. In the present specification, the character "/" generally indicates that the front and rear related objects are an or relationship.
Those of ordinary skill in the art will appreciate that the elements and algorithm steps described in connection with the embodiments disclosed herein may be embodied in electronic hardware, in computer software, or in a combination of the two, and that the various example components and steps have been generally described in terms of function in the foregoing description to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present specification.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.
In the several embodiments provided in this specification, it should be understood that the disclosed systems, apparatuses, and methods may be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. In addition, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices, or elements, or may be an electrical, mechanical, or other form of connection.
The units described as separate units may or may not be physically separate, and units shown 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 units may be selected according to actual needs to achieve the purposes of the embodiments of the present description.
In addition, each functional unit in each embodiment of the present specification may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on this understanding, the technical solution of the present specification is essentially or a part contributing to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium, including several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in the embodiments of the present specification. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The principles and embodiments of the present specification are explained in this specification using specific examples, the above examples being provided only to assist in understanding the method of the present specification and its core ideas; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope based on the ideas of the present specification, the present description should not be construed as limiting the present specification in view of the above.

Claims (15)

1. A method of distillating a crude oil, the method comprising:
according to preset current fraction cutting parameters, performing simulated distillation on crude oil to obtain a plurality of groups of side-stream fractions;
determining physical properties of each group of side streams according to single molecules and the content of single molecules contained in each group of side streams based on a pre-trained physical property calculation model;
judging whether the physical properties of each group of side line fractions meet the feeding requirements of the secondary processing device:
outputting current distillate cutting parameters when the physical properties of each group of side-cut distillate meet the feeding requirements of the secondary processing device, and applying the current distillate cutting parameters to an actual crude oil distillation process;
when the physical properties of any group of side line fractions do not meet the feeding requirements of the secondary processing device, the current fraction cutting parameters are adjusted, and the step of obtaining a plurality of groups of side line fractions by carrying out simulated distillation on crude oil according to the adjusted fraction cutting parameters is carried out until the physical properties of each group of side line fractions meet the feeding requirements of the secondary processing device.
2. The method for distillative cutting of crude oil according to claim 1, wherein,
the adjusting of the current fraction cutting parameters comprises:
determining an unsatisfied constraint index in the feed demand of the secondary processing device;
and adjusting the current fraction cutting parameter according to the unsatisfied limiting index.
3. The crude oil distillation cut method as set forth in claim 2, wherein the type of feed limit indicator of the secondary processing device includes feed quality and processing capacity.
4. A crude oil distillation cut according to claim 3, wherein the feed quality comprises at least one of the following limitations:
the distillation range of the side stream fed by the secondary processing device is in a preset distillation range threshold range;
the content of specified elements and/or specified structural groups in the side stream fed by the secondary processing device is smaller than a preset content threshold value;
the specified physical property data of the side stream fed by the secondary processing device is within the preset physical property data threshold value range.
5. The crude oil distillation cut process as set forth in claim 1, wherein the single molecule and the content of single molecules contained in each set of side streams is determined by the steps comprising:
Acquiring each single molecule and the content of each single molecule in crude oil based on a pre-constructed crude oil molecular database;
and determining the single molecules and the content of the single molecules contained in each group of side-cut lines according to the boiling point and the content of each single molecule in the crude oil based on a pre-constructed distillation cutting model.
6. The crude oil distillation cut method according to claim 5, wherein the boiling point of each single molecule is obtained by:
obtaining, for each of the single molecules, the number of groups of each group constituting the single molecule, and obtaining a contribution value of each of the groups to a boiling point;
inquiring the consistency molecules in a real molecule database, extracting corresponding boiling point data if unique real molecules exist, otherwise, inputting the number of groups of each group forming the single molecule and the contribution value of each group to the boiling point into a physical property calculation model trained in advance, and obtaining the boiling point of the single molecule output by the physical property calculation model.
7. The crude oil distillation cut method according to claim 1, wherein determining the physical properties of each set of side streams from the single molecules and the content of single molecules contained in each set of side streams based on a physical property calculation model trained in advance, comprises:
Calculating to obtain each single molecule physical property of each single molecule based on a physical property calculation model trained in advance;
according to the preset mixing rule of the physical properties of each mixture, calculating the physical properties of each side stream of each group through the physical properties and the content of each single molecule.
8. The crude oil distillation cut process of claim 1, wherein the secondary processing unit comprises at least one of a catalytic reformer, a catalytic cracker, a hydrocracker, a delayed coker, and a resid hydrotreater, wherein the feed requirement of each of the secondary processing units corresponds to a side stream that is the feed to the secondary processing unit.
9. The method for distillating and cutting crude oil according to claim 8, wherein determining whether the physical properties of each set of side streams satisfy the feeding requirements of the secondary processing device comprises:
for each set of side cuts, determining whether the physical properties of the set of side cuts meet the feed requirements of the secondary processing device corresponding to the set of side cuts:
when the physical properties of all side-cut streams meet the feeding requirements of the secondary processing device corresponding to the respective side-cut streams, judging that the physical properties of each group of side-cut streams meet the feeding requirements of the secondary processing device;
When the physical properties of any one of the side streams do not meet the feeding requirements of the secondary processing device corresponding to the side stream of the group, the physical properties of the side stream of the group are judged not to meet the feeding requirements of the secondary processing device.
10. A crude oil distillation cutting apparatus, the apparatus comprising:
the simulated distillation unit is used for performing simulated distillation on the crude oil according to preset current fraction cutting parameters to obtain a plurality of groups of side fractions;
a determining unit for determining physical properties of each set of side streams from single molecules and contents of single molecules contained in each set of side streams based on a physical property calculation model trained in advance;
the processing unit is used for judging whether the physical properties of each group of side streams meet the feeding requirements of the secondary processing device: outputting current distillate cutting parameters when the physical properties of each group of side-cut distillate meet the feeding requirements of the secondary processing device, and applying the current distillate cutting parameters to an actual crude oil distillation process; when the physical properties of any group of side line fractions do not meet the feeding requirements of the secondary processing device, the current fraction cutting parameters are adjusted, and the step of obtaining a plurality of groups of side line fractions by carrying out simulated distillation on crude oil according to the adjusted fraction cutting parameters is carried out until the physical properties of each group of side line fractions meet the feeding requirements of the secondary processing device.
11. The crude unit of claim 10, wherein the processing unit is further configured to:
determining an unsatisfied constraint index in the feed demand of the secondary processing device;
and adjusting the current fraction cutting parameter according to the unsatisfied limiting index.
12. The crude unit of claim 10, wherein the determining unit is further configured to:
acquiring each single molecule and the content of each single molecule in crude oil based on a pre-constructed crude oil molecular database;
and determining the single molecules and the content of the single molecules contained in each group of side-cut lines according to the boiling point and the content of each single molecule in the crude oil based on a pre-constructed distillation cutting model.
13. The crude unit of claim 10, wherein the determining unit is further configured to:
calculating to obtain each single molecule physical property of each single molecule based on a physical property calculation model trained in advance;
according to the preset mixing rule of the physical properties of each mixture, calculating the physical properties of each side stream of each group through the physical properties and the content of each single molecule.
14. The crude oil distillation cutting equipment is characterized by comprising a processor, a communication interface, a memory and a communication bus, wherein the processor and the communication interface and the memory are communicated with each other through the communication bus;
a memory for storing a computer program;
a processor for implementing the steps of the crude oil distillation cut method as claimed in any one of claims 1 to 9 when executing a program stored on a memory.
15. A computer readable storage medium storing one or more programs executable by one or more processors to perform the steps of the crude oil distillation cut method of any of claims 1-9.
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