CN107918280A - A kind of NETWORK IN REFINERY Optimization Scheduling for pressing from both sides point method and being mixed with superstructure method - Google Patents
A kind of NETWORK IN REFINERY Optimization Scheduling for pressing from both sides point method and being mixed with superstructure method Download PDFInfo
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Abstract
A kind of NETWORK IN REFINERY Optimization Scheduling for pressing from both sides point method and being mixed with superstructure method of the present invention, using the method for the present invention, the artificial banknotes-system hydrogen of inefficiency can be pressed from both sides to point diagram asks folder point to be changed to efficiently seek folder point with computer programming, without graphical treatment, further the folder tried to achieve point is mixed as folder point constraint with superstructure method and carries out NETWORK IN REFINERY scheduling modeling, after optimizing solution to model, it can obtain meeting reasonable optimal objective value and accurate operating point needed for engine request at the same time.The pinch analysis method with engineering advantage and the superstructure method with theory analysis advantage have been merged well, avoid the defects of pinch analysis method is with superstructure method, can be on the premise of NETWORK IN REFINERY equipment and pipe net arrangement not be changed, make hydrogen source, the matching of hydrogen trap more reasonable, reduce the consumption of pure hydrogen and the discharge capacity of hydrogen combustion gas, greatly improve the technical merit of the hydrogen network Optimized Operation of oil plant, enterprise economic benefit and enhance the competitiveness.
Description
Technical field
The present invention relates to a kind of method that scheduling is optimized to NETWORK IN REFINERY, a kind of hydrogen is pressed from both sides point diagram by this method
Solution ask folder point be changed to language programming ask folder point (without graphical treatment), and further using the folder tried to achieve point as
Folder point constraint is mixed with superstructure method linear programming model progress NETWORK IN REFINERY scheduling modeling, finally with simplex method into
A kind of method that row global optimization solves.
Background technology
Hydrogen resources play very important effect in terms of traditional energy deep processing, and petroleum refining industry is hydrogen disappears
The maximum terminal market of consumption, its hydrogen-consuming volume account for 90% ([1] Chen Feng pretty young woman coming years whole world hydrogen need of global total hydrogen-consuming volume
Ask rapid growth oil Refining Technologies and engineering .2011,41:60).Oil refining enterprise is balanced by the production consumption of reasonable arrangement hydrogen, is strong
The measures such as change hydrogen management, Optimization of Hydrogen network, it is possible to achieve increase the quantity of crude oil deep processing, device for producing hydrogen is stopped or few
Open, various hydrogen resources of effective use and reducing waste, save production cost so as to fulfill oil plant, increase economic efficiency and look forward to
The purpose of industry competitiveness.Currently, the method for optimizing scheduling to hydrogen network both at home and abroad mainly has pinch analysis method and superjunction
Structure method.
Pinch analysis method, be by Britain famous scholar Linnhoff and Hindmarsh ([2] Linnhoff B,
Hindmarsh E.The pinch design method for heat exchanger networks.Chemical
Engineering Science.1983,5:745-763) proposed in early 1980s, earliest applied to heat exchange network
Optimization problem.The Towler in Manchester, England Polytechnics process integration research center in 1996 et al. ([3] Towler G
P,Mann R,Serriere A J,Gabaude C M D.Refinery hydrogen management:Cost
analysis of chemically-integrated facilities.Industrial&Engineering Chemistry
Research.1996,35(7):2378-2388) according to the similitude of hydrogen network and heat-exchange network, first using folder point analysis
Method analyzes and researches hydrogen network.Pinch analysis method be it is a kind of directly graphic method, be easily understood, it is easy to operation with
Perform, it is deep to be welcome by industrial quarters.
Superstructure method is modeled with general mathematical plan model, is a kind of important research method in process system engineering.
Hallale＆Liu ([4] Hallale N, Liu F.Refinery hydrogen management for clean in 2001
fuels production.Advances in Environmental Research.2001,6(1):81-98) propose first
Superstructure method is applied in the problem of management of hydrogen network.The primary work of superstructure method is to establish to be consistent with Practical Project
Mathematical programming model, model includes object function and constraints.Model can be divided into linear programming (LP, Linear again
Programming), Non-Linear Programming (NLP, Nonlinear Programming), mixed integer linear programming (MILP,
Mixed Integer Linear Programming) and mixed integer nonlinear programming (MINLP, Mixed Integer
Nonlinear Programming) model.Superstructure method has very strong versatility and flexibility, deep to be welcome by theoretical circles.
Hydrogen pinch analysis method is based on graphic-arts technique, explicit physical meaning, which kind of purity every kind of device produces and consume
Hydrogen is very clear, by that can obtain hydrogen gas system hydrogen-consuming volume (new hydrogen consumption amount and gas emission amount) to the analysis for pressing from both sides point diagram
Minimum value.This method is easily understood, easy to operation with performing, deep to be favored by industrial quarters.But there is also can not for pinch analysis method
Proceed from the reality at the same consider as far as possible more constraints (change such as hydrogen purity that device for producing hydrogen produces, facing hydrogen production device
Increase or decrease, hydrogen external channeling, purification or compression efficiency etc.)；Although the minimum value of hydrogen gas system hydrogen-consuming volume can be obtained,
But the optimization operating point of hydrogen network can not be directly obtained；For large-scale complicated hydrogen network, due to doing the precision of figure method
Limitation, the problems such as accurately folder point position can not be obtained and multiple-objection optimization cannot be carried out.
Analyze in contrast, superstructure method is modeled with general mathematical plan model, using general mathematical programming model
Optimization method is solved, and has very strong universality and flexibility, is developed rapidly after being proposed from 2001.It is but super
The similarity of Structure Method model and actual production process determines its accuracy, very stringent to the requirement of establishing accurate model,
Object function and constraints are better closer to actual conditions, but in practical engineering application, are frequently present of constraints simplification
Or approximate situation, and then the optimal solution that superstructure method model obtains occur and can not meet the hydrogen gas system that pinch analysis method obtains
It is to best suit engineering reality that the minimum value of hydrogen-consuming volume, superstructure method model, which obtain multigroup optimal solution and can not voluntarily judge which group solution,
Unreasonable situation, the practical engineering applications to superstructure method such as border requirement bring great difficulty.In the prior art ([5] Liu
Gui Lian, Liu Yongzhong, Zhao Zhenhui, Feng Xiao, Tang Ming member Chinese invention patents：" a kind of definite hydrogen network system folder pure hydrogen amount of point and stream
The method of amount ", CN 1815227A) in, the folder point graphical method of proposition is different with the present invention, is still to be obtained by figure
Point is pressed from both sides, and does not apply to folder point method acquired results in superstructure method model.
The content of the invention
The present invention is in view of the problems of the existing technology and insufficient, there is provided a kind of NETWORK IN REFINERY Optimized Operation side
Method.
The present invention combines the LP models of the superstructure method of NETWORK IN REFINERY optimization, and point graphic principle is pressed from both sides with a kind of hydrogen
Based on, a kind of method that hydrogen network folder point is found using computer programming is proposed, according to hydrogen trap composite curve (broken line)
Translation distance is asked in position of each intersection point of on the hydrogen source composite curve after translation itself, has the friendship of Minimum Translational Distance
Point is the method for folder point.After being converted into computer program according to above-mentioned thought, by the production hydrogen flowrate of all hydrogen sources and corresponding hydrogen
The maximum impurity concentration data input of the impurity concentration of gas, the consumption hydrogen flowrate of all hydrogen traps and corresponding hydrogen, once runs
With direct locating clip point position, and obtain the minimum value essence of corresponding hydrogen network hydrogen-consuming volume (new hydrogen consumption amount and gas emission amount)
Exact figures evidence, without graphical treatment.Then with obtained folder point data establish the constraint of folder point (including the constraint of new hydrogen consumption amount and
Gas emission amount constrains), hybrid modeling in superstructure method LP models is incorporated, finally carries out the global optimization based on simplex method
Solve.
The present invention is to solve above-mentioned technical problem by following technical proposals：
The present invention provides a kind of NETWORK IN REFINERY Optimization Scheduling, its feature is that it comprises the following steps：
S1, press from both sides the folder point that point graphic principle orients hydrogen source composite curve and hydrogen trap composite curve using a kind of hydrogen, and
Obtain corresponding minimum new hydrogen consumption amount and minimum gas emission amount；
S2, establish with the folder point position of acquisition, minimum new hydrogen consumption amount and minimum gas emission amount and press from both sides point constraint, and
Increase folder point constraint in superstructure method LP models, carries out establishing mixing LP modelings, mixed model considers minimum new hydrogen and disappears respectively
Consumption and minimum hydrogen two kinds of targets of surplus, wherein, folder point constraint includes minimum new hydrogen consumption amount constraint and minimum combustion gas
Discharge capacity constrains；
S3, based on simplex algorithm to mixed model carry out global optimization, be met folder point rule a hydrogen network tune
Global optimum's operating point of degree, for instructing actual production.
On the basis of common knowledge of the art, above-mentioned each optimum condition, can be combined, each preferably real up to the present invention
Example.
The positive effect of the present invention is：
The present invention seeks folder point based on a kind of hydrogen folder point graphic principle, and establishes folder point with the folder point tried to achieve and constrain,
Incorporate in superstructure method LP models and carry out hybrid modeling, and consider minimum new hydrogen consumption amount and minimum hydrogen surplus respectively
Two kinds of targets.This hybrid modeling method overcome former pinch analysis method can not proceed from the reality and meanwhile consider as far as possible it is more it is actual about
Beam condition, can not directly obtain the defects of accurate operating point；Former superstructure method LP models are improved due to model accuracy not
Height, the optimal solution tried to achieve can not meet the hydrogen network hydrogen-consuming volume (new hydrogen consumption amount and gas emission amount) that pinch analysis method obtains
Minimum value, obtained multigroup optimal solution and can not voluntarily judge which group optimal solution be to fit well on what actual industrial production required
Defect.
Method used in the present invention, enables to be mixed with the obtained optimal solution of superstructure LP models for pressing from both sides point constraint at the same time
Meet the minimum value for the hydrogen network hydrogen-consuming volume that folder point method obtains, can rapidly and accurately obtain the hydrogen net for meeting engine request
Reasonable optimal objective value and accurate operating point needed for network Optimized Operation.The folder point minute with engineering advantage has been merged well
Analysis method and the superstructure method with theory analysis advantage, avoid the defects of pinch analysis method is with superstructure method, have universality,
It can realize under the process units and technical conditions of existing extensive oil refining enterprise, make the matching more adduction of hydrogen source and hydrogen trap
Reason, reduces the consumption of new hydrogen and the discharge capacity of combustion gas, greatly improves the horizontal and economic effect of network management of hydrogen of oil refining enterprise
Benefit.
Brief description of the drawings
Fig. 1 a-c are the locating clip point of present pre-ferred embodiments, obtain minimum new hydrogen consumption amount and minimum gas emission amount
Flow chart.
Fig. 2 is hydrogen source composite curve, the hydrogen trap composite curve schematic diagram for asking for translation distance vector XX.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, the technical solution in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
Part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
The all other embodiments obtained on the premise of creative work is not made, belong to the scope of protection of the invention.
Step (1)：Programming is carried out using computer language, pressing from both sides point graphical method based on hydrogen is accurately positioned folder point, and obtains
To the precise information of the minimum value (minimum new hydrogen consumption amount and minimum gas emission amount) of corresponding hydrogen network hydrogen-consuming volume.
Its thought is：The abscissa and ordinate of the acquisition each intersection point of hydrogen source composite curve, and hydrogen trap composite curve are each
The abscissa and ordinate of a intersection point；According to hydrogen source composite curve of each intersection point of hydrogen trap composite curve (broken line) after translation
On position ask for translation distance；The size for comparing translation distance obtains Minimum Translational Distance, so as to ask for folder point, minimum new hydrogen
Consumption and minimum gas emission amount.The flow chart of program is as shown in Figure 1.
1. illustrate：
J：The set of hydrogen source, J={ 1,2 ..., j ..., Nsc}；
K：The set of hydrogen trap, K={ 1,2 ..., k ..., Nsk}；
Zsc：The vector of all hydrogen source impurity concentrations (%),
Zsk：Impurity maximum entrance limting concentration (%) vector of all hydrogen traps,
Ysc：The vector of all hydrogen source hydrogen purities (%),
Ysk：Minimum hydrogen purity (%) vector of all hydrogen trap requirements,
Represent all hydrogen source design maximum supply flow (Nm3/ h) vector,
Represent the minimum hydrogen flowing quantity requirement (Nm of all hydrogen traps3/ h) vector,
Msc：Represent the impurity load vector (Nm of all hydrogen sources3/ h),*
For Hadamard products；
Msk：Represent the maximum contaminant load vector (Nm of all hydrogen traps3/ h),*
For Hadamard products；
The hydrogen purity (%) of hydrogen source j (∈ J)；
The minimum hydrogen purity (%) of hydrogen trap k (∈ K) requirements；
The impurity concentration (%) of hydrogen source j (∈ J)；
The impurity maximum entrance limting concentration (%) of hydrogen trap k (∈ K)；
Design maximum supply flow (the Nm of hydrogen source j3/h)；
The minimum hydrogen flowing quantity of hydrogen trap k requires (Nm3/h)；
Impurity load (the Nm of hydrogen source j3/h)；
Maximum contaminant load (the Nm of hydrogen trap k3/h)；
FNS：Minimum new hydrogen consumption amount (Nm3/h)；
FWS：Minimum gas emission amount (Nm3/h)。
Wherein：
Obtain the abscissa and ordinate of each intersection point of hydrogen source composite curve, and the horizontal stroke of each intersection point of hydrogen trap composite curve
Coordinate and ordinate comprise the following steps：
By ZskMiddle element is ascending to be ranked up, and willMiddle element and ZskMiddle element corresponds；
WillMiddle element adds up one by one, obtains each intersection point abscissa of hydrogen trap composite curve
ByObtain hydrogen trap maximum contaminant load
By MskMiddle element adds up one by one, obtains each intersection point ordinate of hydrogen trap composite curve
By ZscMiddle element is ascending to be ranked up, and willMiddle element and ZscMiddle element corresponds；
WillMiddle element adds up one by one, obtains each intersection point abscissa of hydrogen source composite curve
ByObtain hydrogen source impurity load
By MscMiddle element adds up one by one, obtains each intersection point ordinate of hydrogen source composite curve
2. translation distance vector XX's seeks method：
Fig. 2 is hydrogen source recombination line, the portion intercepts figure of hydrogen trap recombination line for asking for translation distance vector XX.Judge that hydrogen trap is answered
Close the ordinate of each intersection point (such as point B) of curveBelong to two endpoints of which section hydrogen source line of hydrogen source composite curve (such as
Point C is lower extreme point) ordinateWithBetween, and hydrogen trap composite curve intersection point is obtained according to formula (1-4) and is not being put down (such as point B)
The abscissa X of corresponding point (such as point A) on the hydrogen source composite curve of shiftingk, the difference of the abscissa of point B and point A is then obtained, such as formula
The distance XX of the translation of (1-5), i.e. hydrogen source composite curve under the intersection point (such as point B)k, by each intersection point of hydrogen trap composite curve
(such as point B) corresponding translation distance is obtained, and can obtain translation distance vector
Due to the slope (i.e. the impurity concentration of hydrogen source, with point A and the coordinate representation of point C) of hydrogen source line：
Derivation can obtain：
3. Rule of judgment, Minimum Translational Distance ask method and output data：
According to the definition of hydrogen folder point, onboard hydrogen source composite curve intersects until it with hydrogen trap composite curve, and overlapping
Region, hydrogen source composite curve are fully located at the lower section of hydrogen trap composite curve, their intersection point is exactly the folder point of hydrogen network.Full
On the premise of hydrogen source composite curve is below the hydrogen trap composite curve in sufficient overlapping region, the translation distance of minimum is found out, it is corresponding
Hydrogen trap composite curve intersection point (as point B) be to press from both sides point.Therefore each translation distance XX is tackled firstkJudged, judge bar
Part such as formula (1-6).
This sentences first translation distance (i.e. the corresponding translation distance of first intersection point of hydrogen trap composite curve) XX1Exemplified by,
It is if each such as the point (X of point AkFor its abscissa) translation XX1Afterwards, still on the right of hydrogen trap composite curve intersection point (as point B), that
It can illustrate that, in overlapping region, hydrogen source composite curve is fully located at the lower section of hydrogen trap composite curve, i.e. XX1It is to meet condition
, otherwise just excluded.Similar, to each translation distance XXkSuch judgement is carried out, all satisfactions can be obtained
The alternative translation distance of condition.Sequence from small to large is carried out to all alternative translation distances, you can be met condition
Minimum Translational Distance, it is assumed that XX1For Minimum Translational Distance, XX1Corresponding hydrogen trap composite curve intersection point is folder point (such as point B)XX1As minimum new hydrogen consumption amount FNS, it should be noted that new hydrogen here generally refer to pure hydrogen (hydrogen it is pure
Spend for 100%), if not pure hydrogen is, it is necessary at impurity concentration by the way that the impurity concentration of hydrogen source and hydrogen trap to be subtracted to new hydrogen
Reason.This method stands good after treatment, it should be noted that the impurity concentration of new hydrogen should meet less than other hydrogen sources
The condition of impurity concentration.Corresponding minimum gas emission amount FWSSuch as formula (1-7).
Wherein,WithThe respectively abscissa of last of hydrogen source composite curve and hydrogen trap composite curve point.
Step (2)：Point data is pressed from both sides using gained in step (1) and establishes folder point constraint, and involvement superstructure method carries out mixing and builds
Mould, includes the following steps：
1. hydrogen network is modeled using superstructure method：The superstructure model of hydrogen network, 2001 by
Hallale&Liu[3]It is proposed first.Hydrogen network superstructure model is mathematical programming model, it is by the company between hydrogen source and hydrogen trap
The relation of connecing shows, and model includes object function (economy, quality, energy saving, emission reduction, the safety target of such as hydrogen network)
With constraints (such as traffic constraints, purity constrain).The present invention is using the super of linear programming (LP) model foundation hydrogen network
Structural model.
About beam analysis：
The hydrogen outlet of hydrogen source (Source) device is analogous to current divider in the modeling of superstructure method, can export device
Hydrogen stream stock for it is one or more stream stock be transported to consumption hydrogen production device go.Common hydrogen source has：Hydrogen production bioreactor, purifying plant,
Consumption hydrogen production device that the new hydrogen of outsourcing and the dry gas of discharge can be utilized etc..Although in the actual production process, the hydrogen of each hydrogen source
Gas purity is slightly changed, but since its amplitude of variation is smaller, will be each in hydrogen network when superstructure of the present invention models
Hydrogen source hydrogen purity is set to fixed value.Current divider simply shunts hydrogen flowing quantity, it is impossible to unnecessary hydrogen is stored, so
The hydrogen total flow of current divider outlet is equal to the flow of hydrogen source actual provision.
Shown in the traffic constraints of hydrogen source such as formula (2-1).It represents that the flow summation of hydrogen source j k hydrogen trap of inflow is necessarily less than
Design maximum supply flow equal to hydrogen source j.
Fj,k：Hydrogen source j is assigned to the hydrogen flowing quantity (Nm of hydrogen trap k3/h)；
Design maximum supply flow (the Nm of hydrogen source j3/h)；
J：The set of hydrogen source, J={ 1,2 ..., j ..., Nsc}；
K：The set of hydrogen trap, K={ 1,2 ..., k ..., Nsk}。
Hydrogen trap (Sink) device is consumption hydrogen production device, its entrance is analogous to mixer, and each hydrogen trap device can receive one
Or branched hydrogen stream stock mixing, mixed hydrogen stream stock should meet the device to parameter indexes such as entrance density of hydrogen, flows
Requirement.Common hydrogen trap has：Reformed pre-hydrogenated, S-Zorb (adsorbing and desulfurizing catalytic cracking gasoline), benzene extracting, kerosene hydrogenation,
Diesel oil hydrogenation, wax oil hydrogenation, lube oil hydrogenation, be hydrocracked, purifying plant etc..
Formula (2-2) represents that the hydrogen total flow of each hydrogen source inflow hydrogen trap k have to be larger than the minimum hydrogen stream equal to hydrogen trap k
Amount requires.
The minimum hydrogen flowing quantity of hydrogen trap k requires (Nm3/h)。
Formula (2-3) represents that the hydrogen purity that the hydrogen purity of each hydrogen source inflow hydrogen trap k have to be larger than equal to hydrogen trap k will
Ask.
The hydrogen purity (%) of hydrogen source j (∈ J)；
The minimum hydrogen purity (%) of hydrogen trap k (∈ K) requirements.
2. newly-increased folder point constraint：
Folder point proposed by the present invention constrains the principle established and is：In step (2) the 1. superstructure model of middle foundation, addition
Meet the minimum value of the hydrogen gas system public work hydrogen-consuming volume that application folder point method program obtains in step (1) at the same time, that is, meet new
The constraint equal with minimum result obtained by folder point method of hydrogen consumption amount and gas emission amount.
Therefore, all new hydrogen j' flow into the sum of flow of hydrogen trap k and should disappear equal to the new hydrogen of minimum that folder point method program is tried to achieve
Consumption, so, the minimum new hydrogen consumption amount constraint of folder point method is increased newly as shown in formula (2-4).
J'：The set of new hydrogen, new hydrogen generally refer to the highest hydrogen source of hydrogen purity in hydrogen network in engineering, and
Fj',k：New hydrogen j' is assigned to the hydrogen flowing quantity (Nm of hydrogen trap k3/h)；
FNS：The new hydrogen consumption amount (Nm of minimum that folder point method program is tried to achieve in step (1)3/h)。
According to the hydrogen network system matches principle of pinch analysis method, (i.e. the hydrogen purity of hydrogen source is big for the hydrogen source under folder point
The hydrogen purity of hydrogen source at folder point, the impurity concentration of hydrogen source is less than the impurity concentration for pressing from both sides the hydrogen source at point in other words) it is improper
Discharged as combustion gas.So only the hydrogen source of (including folder point) is discharged as combustion gas on folder point.Therefore, Suo Youqing
The sum of residual hydrogen tolerance of hydrogen source j " of hydrogen purity that gas purity is less than or equal at folder point should be equal to folder point method program and ask
The minimum gas emission amount obtained, so, folder point method minimum gas emission amount constraint is increased newly such as shown in formula (2-5).
J″：Hydrogen purity is less than or equal to the set of the hydrogen source of the hydrogen purity at folder point, and
Hydrogen purity is less than or equal to the design maximum supply flow (Nm of the hydrogen source j " of the hydrogen purity at folder point3/
h)；
Fj″,k：The hydrogen source j " for the hydrogen purity that hydrogen purity is less than or equal at folder point is assigned to the hydrogen flowing quantity of hydrogen trap k
(Nm3/h)；
FWS：The minimum gas emission amount (Nm that folder point method program is tried to achieve in step (1)3/h)。
3. determine the optimization aim for the hydrogen network LP models that pinch analysis method is mixed with superstructure method：
Incorporation engineering of the present invention actually discusses two kinds of object functions respectively：A kind of new hydrogen consumption amount for being hydrogen network is most
It is small, the other is the hydrogen total surplus amount of hydrogen network is minimum.
The new hydrogen purity of oil refining enterprise is very high, and the production time produced and cost are very high, therefore, of the invention first
Target is to make the sum of new hydrogen consumption amount of hydrogen network for minimum, as shown in formula (2-6).
Hydrogen is not set up more than independent storage tank progress using hydrogen pipe network as hydrogen-storing device current domestic large and medium-sized oil refining enterprise
Amount stores, and hydrogen unnecessary in pipe network, which will be vented, in production process burns or be discharged into fuel system.Therefore, wasted to reduce,
The second target of the present invention is to make the hydrogen total surplus amount of hydrogen network minimum, as shown in formula (2-7).
Step (3)：The LP models established using simplex algorithm to step (2) are solved
The model that the present invention establishes is single goal LP models, the conventional software for solving LP models can be used to try to achieve optimal
Solution.The simplex algorithm that the present invention is write using c program, the solution carried out on VC++6.0 software platforms to model.Respectively with
1. constrained using folder point is not increased；2. increase the new hydrogen consumption amount folder point constraint of a minimum；3. the minimum new hydrogen consumption amount of increase with
Under three kinds of restrained conditions of minimum two folder point constraints of gas emission amount, respectively with object function one (formula (2-6)) and target letter
Number two (formula (2-6)) is solved, and comparative analysis result of calculation is to verify the validity of mixed model.
A specific example is named to illustrate the present invention, so that those skilled in the art better understood when this
The technical solution of invention：
Existing main 4 sets of the hydrogen production bioreactor of certain Large-scale Refinery, is respectively 1# continuous reformers and three sets of device for producing hydrogen.1#
800,000 tons of CONTINUOUS REFORMER annual production capacity, the hydrogen purity of by-product is up to 92%；1# device for producing hydrogen, production hydrogen 20000Nm3/h (it is current,
1# device for producing hydrogen is in suspended state), 2# device for producing hydrogen, design production hydrogen 37332.6032Nm3/h, 1#, 2# hydrogen manufacturing is through PSA devices
Purification, hydrogen purity reach 99.9%；3# device for producing hydrogen, design production hydrogen 22700.341Nm3/h, after PSA is purified after 99.9% confession
Continuous hydrogen.In addition to PSA devices, hydrogen purification device further includes 1 set of membrane separation device, produces hydrogen 5000Nm3/h, and hydrogen purity is
92%.Wherein, the present invention is calculated for the data of device for producing hydrogen using the data of actual hydrogen output.The existing consumption of the oil plant
Hydrogen production device is respectively reformed pre-hydrogenated, the extracting of S-Zorb, benzene, kerosene hydrogenation, 3# diesel oil hydrogenations, 4# diesel oil hydrogenations, wax oil hydrogenation
Processing, lube oil hydrogenation, hydrocracking unit.It is as shown in table 1 that full factory faces hydrogen production device data summarization.
Table 1 (a) oil plant faces hydrogen production device data summarization-hydrogen production bioreactor
Table 1 (b) oil plant faces hydrogen production device data summarization-consumption hydrogen production device
| Device name | Code | Consumption Nm3/h | Hydrogen purity % |
| S-Zorb | SK1 | 1823 | 99.90 |
| Lube oil hydrogenation | SK2 | 10000 | 99.90 |
| It is hydrocracked | SK3 | 40000 | 98.00 |
| 4# diesel oil hydrogenations | SK4 | 24153 | 97.00 |
| It is reformed pre-hydrogenated | SK5 | 431 | 92.00 |
| Benzene extracts | SK6 | 400 | 91.00 |
| Kerosene hydrogenation | SK7 | 250 | 91.00 |
| Wax oil hydrogenation | SK8 | 10000 | 90.00 |
| 3# diesel oil hydrogenations | SK9 | 6000 | 85.00 |
Step (1)：Folder point method program entry data and its operation result
The program flow diagram of folder point is calculated in step (1) shown in Fig. 1, it is as follows for the input data of embodiment：
Zsc=[7.90%, 7.90%, 32.69%, 67.69%, 69.61%]；
Zsk=[0.00%, 0.00%, 1.90%, 2.90%, 7.90%, 8.90%, 8.90%, 9.90%,
14.90%]；
Have be noted that herein at 2 points first, since SC1 and SC2 is as new hydrogen, so not as folder point method program entry
Data substitute into, and hydrogen production bioreactor entry data only has SC3, SC4, SC5, SC6, SC7；Second, hydrogen folder point diagram as previously mentioned
Described in method principle, since the impurity concentration of new hydrogen (SC1 and SC2) is 0.10%, so here by the miscellaneous of all hydrogen sources and hydrogen trap
Matter concentration data is handled, that is, subtracts 0.10%.
Pressing from both sides point method program operation result is：Minimum new hydrogen consumption amount is 57489.4557Nm3/h, and minimum gas emission amount is
16159.4557Nm3/h, hydrogen surplus for 18702.9442Nm3/h (wherein, surplus is by being calculated, including
Two parts, a part are remaining new hydrogen amount, and another part is gas emission amount), the hydrogen purity for pressing from both sides hydrogen source at point is 92%,
That is the hydrogen purity of 1# CONTINUOUS REFORMERs SC3.
Step (2)：Hydrogen network superstructure method models (without pressing from both sides point constraint and constraining two class LP models containing point is pressed from both sides) and excellent
Change interpretation of result
Simplex algorithm program entry data：
Ysc=[99.90%, 92.00%, 92.00%, 67.21%, 32.21%, 30.29%]；
Ysk=[99.90%, 99.90%, 98.00%, 97.00%, 92.00%, 91.00%, 91.00%, 90.00%,
85.00%]；
Since SC1 and SC2 is as new hydrogen, and hydrogen purity is identical, so here data are merged with processing, i.e., new hydrogen
Yield (SC1+SC2) is 60032.9442Nm3/h, and hydrogen purity 99.90%, remaining hydrogen production bioreactor data is constant, that is, produces hydrogen
Device has (SC1+SC2), SC3, SC4, SC5, SC6, SC7, totally six groups of input datas, and consumption hydrogen production device input data is constant.
Constraint and the example EXPANSION EQUATION FOR STEEL of object function：
Hydrogen source flow constrains：
Hydrogen trap traffic constraints：
Purity constrains：
The newly-increased minimum new hydrogen consumption amount constraint of folder point method：
Newly-increased folder point method minimum gas emission amount constraint：
Minimum new hydrogen consumption amount target：
Minimum hydrogen surplus target：
Result of calculation is analyzed：
1. do not increase the superstructure LP model optimization results of folder point constraint
It is constrained including (3-1), (3-2), (3-3) substantially, and minimum new hydrogen consumption amount target (3-6) and minimum is respectively adopted
Hydrogen surplus target (3-7).The simplex algorithm write using c program solves model, optimum results such as table 2 and table
3, it is noted that the production hydrogen of 2# device for producing hydrogen and 3# device for producing hydrogen is taken as new hydrogen and uses here, and purity is identical, therefore by 2#
The data of device for producing hydrogen and 3# device for producing hydrogen merge.
2. the superstructure LP model optimization results of the minimum new hydrogen consumption amount constraint of one folder point of increase
It is constrained including (3-1), (3-2), (3-3), (3-4) substantially, and minimum new hydrogen consumption amount target (3-6) is respectively adopted
With minimum hydrogen surplus target (3-7).The simplex algorithm write using c program solves model, and optimum results are such as
Table 4 and table 5.
3. the minimum new hydrogen consumption amount of increase and the superstructure LP model optimization knots of minimum two folder point constraints of gas emission amount
Fruit
It is constrained including (3-1), (3-2), (3-3), (3-4), (3-5) substantially, and minimum new hydrogen consumption amount mesh is respectively adopted
Mark (3-6) and minimum hydrogen surplus target (3-7).The simplex algorithm write using c program solves model, optimization
As a result such as table 6 and table 7.
4. contrast three kinds of superstructure LP models optimum results under two kind targets respectively
New hydrogen consumption amount, gas emission amount and hydrogen in optimum results of three kinds of superstructure models under two targets remain
Surplus is removed respectively from 2~table of table 7, and is listed in Table 8.
Table 2 (a) does not increase optimum results of the superstructure model of folder point constraint under minimum new hydrogen consumption amount target
Table 2 (b) does not increase optimum results of the superstructure model of folder point constraint under minimum new hydrogen consumption amount target
Table 3 (a) does not increase optimum results of the superstructure model of folder point constraint under minimum hydrogen surplus target
Table 3 (b) does not increase optimum results of the superstructure model of folder point constraint under minimum hydrogen surplus target
Table 4 (a) increases optimum results of the superstructure model of a folder point constraint under minimum new hydrogen consumption amount target
Table 4 (b) increases optimum results of the superstructure model of a folder point constraint under minimum new hydrogen consumption amount target
Table 5 (a) increases optimum results of the superstructure model of a folder point constraint under minimum hydrogen surplus target
Table 5 (b) increases optimum results of the superstructure model of a folder point constraint under minimum hydrogen surplus target
Table 6 (a) increases optimum results of the superstructure model of two folder point constraints under minimum new hydrogen consumption amount target
Table 6 (b) increases optimum results of the superstructure model of two folder point constraints under minimum new hydrogen consumption amount target
Table 7 (a) increases optimum results of the superstructure model of two folder point constraints under minimum hydrogen surplus target
Table 7 (b) increases optimum results of the superstructure model of two folder point constraints under minimum hydrogen surplus target
The contrast of 8 three kinds of superstructure models of table optimum results under two targets respectively
From table 8 we can see that：With folder point method program operation result (minimum new hydrogen consumption amount 57489.4557Nm3/
H, minimum gas emission amount 16159.4557Nm3/ h, hydrogen surplus 18702.9442Nm3/ h) compare, hydrogen network superstructure
LP models are under minimum new hydrogen consumption amount target, three kinds of model calling program operation results new hydrogen consumption amount, combustion gas row after arranging
High-volume and hydrogen surplus is consistent with folder point method acquired results, it was demonstrated that the feasibility and accuracy of folder point method；And most
Under small hydrogen residue target, do not increase folder point constraints when, new hydrogen consumption amount and with gas emission amount cannot meet press from both sides point
It is that method obtains as a result, new hydrogen consumption amount is excessive, gas emission amount is also smaller than folder point method minimum theoretical value, as a result unreasonable, card
Understand that there are unreasonable area for improvement for original superstructure method LP models；It is constrained adding the new hydrogen consumption amount of a minimum
Afterwards, minimum new hydrogen consumption amount is consistent with folder point method minimum result, but gas emission amount still will than folder point method minimum theoretical value
It is small or unreasonable；After minimum new hydrogen consumption amount and minimum gas emission amount constraint is added, second target also meets
Folder point method acquired results.
To sum up it is concluded that：Increase minimum new hydrogen consumption amount and minimum in hydrogen network original superstructure method LP models
After the two folder point constraints of gas emission amount, superstructure method can be merged completely with two methods of folder point analysis.No matter in minimum
Under new hydrogen consumption amount target or under minimum hydrogen residue target, acquired results are consistent with folder point method acquired results, Er Qieke
To directly obtain the folder point not getable precise manipulation point of method.Meanwhile by further analyzing it can be found that institute's calling program is transported
Row result meets the matching principle of pinch analysis method hydrogen network system：(i.e. hydrogen trap hydrogen purity is less than hydrogen trap on folder point
Equal to the hydrogen purity of hydrogen source at folder point) new hydrogen is not consumed；(i.e. the hydrogen purity of hydrogen source is more than at folder point hydrogen source under folder point
Hydrogen source hydrogen purity) do not discharged as combustion gas.
Therefore, the present invention organically carries out a kind of engineering folder dot map analysis method with superstructure Mathematical Planning LP modelings
Fusion, the defects of avoiding two methods each, can before NETWORK IN REFINERY equipment and pipe net arrangement not be changed
Put, it is quick to obtain the globally optimal solution for being more bonded engineering requirements, there is universality, have and promote and apply valency well
Value.
Claims (7)
1. a kind of NETWORK IN REFINERY Optimization Scheduling for pressing from both sides point method and being mixed with superstructure method, it is characterised in that it includes
Following steps：
S1, press from both sides a point graphic principle using a kind of hydrogen and orient the folder point of hydrogen source composite curve and hydrogen trap composite curve, and obtains
Corresponding minimum new hydrogen consumption amount and minimum gas emission amount；
S2, with the folder point position of acquisition, minimum new hydrogen consumption amount and minimum gas emission amount establish folder point constraint, and in superjunction
Increase folder point constraint in structure method LP models, carries out establishing mixing LP modelings, mixed model considers minimum new hydrogen consumption amount respectively
And minimum hydrogen two kinds of targets of surplus, wherein, folder point constraint includes minimum new hydrogen consumption amount constraint and minimum gas emission
Amount constraint；
S3, based on simplex algorithm to mixed model carry out global optimization, be met folder point rule hydrogen network scheduling
Global optimum's operating point.
2. NETWORK IN REFINERY Optimization Scheduling as claimed in claim 1, it is characterised in that step S1 includes following step
Suddenly：
Step S11, the abscissa and ordinate of each intersection point of hydrogen source composite curve, and each intersection point of hydrogen trap composite curve are obtained
Abscissa and ordinate；
Step S12, ask for translating according to position of each intersection point of hydrogen trap composite curve on hydrogen source composite curve after translation
Distance；
Step S13, the size for comparing translation distance obtains Minimum Translational Distance, thus ask for folder point, minimum new hydrogen consumption amount and
Minimum gas emission amount.
3. NETWORK IN REFINERY Optimization Scheduling as claimed in claim 2, it is characterised in that setting：
J：The set of hydrogen source, J={ 1,2 ..., j ..., Nsc}；
K：The set of hydrogen trap, K={ 1,2 ..., k ..., Nsk}；
Zsc：The vector of all hydrogen source impurity concentrations (%),
Zsk：Impurity maximum entrance limting concentration (%) vector of all hydrogen traps,
Ysc：The vector of all hydrogen source hydrogen purities (%),
Ysk：Minimum hydrogen purity (%) vector of all hydrogen trap requirements,
Represent all hydrogen source design maximum supply flow (Nm3/ h) vector,
Represent the minimum hydrogen flowing quantity requirement (Nm of all hydrogen traps3/ h) vector,
Msc：Represent the impurity load vector (Nm of all hydrogen sources3/ h),
* it is Hadamard products；
Msk：Represent the maximum contaminant load vector (Nm of all hydrogen traps3/ h),
* it is Hadamard products；
The hydrogen purity (%) of hydrogen source j (∈ J)；
The minimum hydrogen purity (%) of hydrogen trap k (∈ K) requirements；
The impurity concentration (%) of hydrogen source j (∈ J)；
The impurity maximum entrance limting concentration (%) of hydrogen trap k (∈ K)；
Design maximum supply flow (the Nm of hydrogen source j3/h)；
The minimum hydrogen flowing quantity of hydrogen trap k requires (Nm3/h)；
Impurity load (the Nm of hydrogen source j3/h)；
Maximum contaminant load (the Nm of hydrogen trap k3/h)；
FNS：Minimum new hydrogen consumption amount (Nm3/h)；
FWS：Minimum gas emission amount (Nm3/h)；
Step S11 comprises the following steps：
By ZskMiddle element is ascending to be ranked up, and willMiddle element and ZskMiddle element corresponds；
By ZskMiddle element is ascending to be ranked up, and willMiddle element and ZskMiddle element corresponds；
WillMiddle element adds up one by one, obtains each intersection point abscissa of hydrogen trap composite curve
ByObtain hydrogen trap maximum contaminant load
By MskMiddle element adds up one by one, obtains each intersection point ordinate of hydrogen trap composite curve
By ZscMiddle element is ascending to be ranked up, and willMiddle element and ZscMiddle element corresponds；
WillMiddle element adds up one by one, obtains each intersection point abscissa of hydrogen source composite curve
ByObtain hydrogen source impurity load
By MscMiddle element adds up one by one, obtains each intersection point ordinate of hydrogen source composite curve
4. NETWORK IN REFINERY Optimization Scheduling as claimed in claim 2, it is characterised in that step S12 includes following
Step：
Judge the ordinate of each intersection point of hydrogen trap composite curveTwo of which section hydrogen source line of hydrogen source composite curve belonged to
Endpoint ordinateWithBetween, and according to formulaHydrogen trap composite curve intersection point is obtained as point B to exist
Abscissa X of the corresponding point as point A on the hydrogen source composite curve not translatedk, the difference of the abscissa of point B and point A is then obtained,
To obtain the distance XX of translation of the hydrogen source composite curve under point Bk, by the corresponding translation of hydrogen trap composite curve each intersection point away from
From obtaining, translation distance vector can be obtained
5. NETWORK IN REFINERY Optimization Scheduling as claimed in claim 2, it is characterised in that step S13 includes following
Step：
To each translation distance XXkJudged, obtain all alternative translation distances for meeting condition, to all alternative translations
Distance carries out sequence from small to large, so as to be met the Minimum Translational Distance of condition；
Rule of judgment such as formulaXX1For the corresponding translation distance of first intersection point of hydrogen trap composite curve, if often
A abscissa XkTranslate XX1Afterwards, still hydrogen trap composite curve intersection point the right, then in overlapping region, hydrogen source composite curve
It is fully located at the lower section of hydrogen trap composite curve, i.e. XX1Meet condition, otherwise just excluded, to each translation distance
XXkCarry out such judgement.
6. NETWORK IN REFINERY Optimization Scheduling as claimed in claim 1, it is characterised in that in step S2,
Minimum new hydrogen consumption amount constraint：All new hydrogen j' flow into the sum of flow of hydrogen trap k and are equal to minimum new hydrogen consumption amount, minimum new
Hydrogen consumption amount constrains formula：
<mrow>
<munder>
<mi>&Sigma;</mi>
<msup>
<mi>j</mi>
<mo>&prime;</mo>
</msup>
</munder>
<munder>
<mi>&Sigma;</mi>
<mi>k</mi>
</munder>
<msub>
<mi>F</mi>
<mrow>
<msup>
<mi>j</mi>
<mo>&prime;</mo>
</msup>
<mo>,</mo>
<mi>k</mi>
</mrow>
</msub>
<mo>=</mo>
<msub>
<mi>F</mi>
<mrow>
<mi>N</mi>
<mi>S</mi>
</mrow>
</msub>
<mo>;</mo>
<mo>&ForAll;</mo>
<msup>
<mi>j</mi>
<mo>&prime;</mo>
</msup>
<mo>&Element;</mo>
<msup>
<mi>J</mi>
<mo>&prime;</mo>
</msup>
<mo>,</mo>
<mi>k</mi>
<mo>&Element;</mo>
<mi>K</mi>
</mrow>
J'：The set of new hydrogen, new hydrogen generally refer to the highest hydrogen source of hydrogen purity in hydrogen network in engineering, and
Fj',k：New hydrogen j' is assigned to the hydrogen flowing quantity (Nm of hydrogen trap k3/h)；
Minimum gas emission amount constraint：All hydrogen purities are less than or equal to the residual hydrogen of the hydrogen source j " of the hydrogen purity at folder point
The sum of tolerance is equal to minimum gas emission amount, and minimum gas emission amount constraint formula is：
<mrow>
<munder>
<mi>&Sigma;</mi>
<msup>
<mi>j</mi>
<mrow>
<mo>&prime;</mo>
<mo>&prime;</mo>
</mrow>
</msup>
</munder>
<msubsup>
<mi>F</mi>
<msup>
<mi>j</mi>
<mrow>
<mo>&prime;</mo>
<mo>&prime;</mo>
</mrow>
</msup>
<mi>max</mi>
</msubsup>
<mo>-</mo>
<munder>
<mi>&Sigma;</mi>
<msup>
<mi>j</mi>
<mrow>
<mo>&prime;</mo>
<mo>&prime;</mo>
</mrow>
</msup>
</munder>
<munder>
<mi>&Sigma;</mi>
<mi>k</mi>
</munder>
<msub>
<mi>F</mi>
<mrow>
<msup>
<mi>j</mi>
<mrow>
<mo>&prime;</mo>
<mo>&prime;</mo>
</mrow>
</msup>
<mo>,</mo>
<mi>k</mi>
</mrow>
</msub>
<mo>=</mo>
<msub>
<mi>F</mi>
<mrow>
<mi>W</mi>
<mi>S</mi>
</mrow>
</msub>
<mo>;</mo>
<mo>&ForAll;</mo>
<msup>
<mi>j</mi>
<mrow>
<mo>&prime;</mo>
<mo>&prime;</mo>
</mrow>
</msup>
<mo>&Element;</mo>
<msup>
<mi>J</mi>
<mrow>
<mo>&prime;</mo>
<mo>&prime;</mo>
</mrow>
</msup>
<mo>,</mo>
<mi>k</mi>
<mo>&Element;</mo>
<mi>K</mi>
</mrow>
J”：Hydrogen purity is less than or equal to the set of the hydrogen source of the hydrogen purity at folder point, and
Hydrogen purity is less than or equal to the design maximum supply flow (Nm of the hydrogen source j " of the hydrogen purity at folder point3/h)；
Fj”,k：The hydrogen source j " for the hydrogen purity that hydrogen purity is less than or equal at folder point is assigned to the hydrogen flowing quantity (Nm of hydrogen trap k3/
h)；
Object function one：Newly hydrogen consumption amount formula is minimum：
Object function two：Minimum hydrogen surplus formula is：
7. NETWORK IN REFINERY Optimization Scheduling as claimed in claim 1, it is characterised in that in step S3,
Mixed model is solved using simplex algorithm, respectively with using do not increase folder point constraint, increase by one minimum it is new
The constraint of hydrogen consumption amount folder point, the minimum new hydrogen consumption amount of increase and three kinds of restrained conditions of minimum two folder point constraints of gas emission amount
Under, solved respectively with object function one and object function two, and comparative analysis result of calculation is to verify having for mixed model
Effect property.
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