CN105182928A - Oil product onsite full-flow scheduling instruction issuing and verifying method - Google Patents

Abstract

The invention relates to an oil product onsite full-flow scheduling instruction issuing and verifying method. After components produced by different devices are blended according to certain proportions, each index needs to reach a national quality standard, refinery scheduling personnel need to make a formula instruction for each blending batch, and issued instructions have to meet requirements for accuracy and continuity. A scheduling instruction storage and transmission method is designed so that the production continuity is guaranteed, besides, for formulas issued by the scheduling personnel, reasonableness automatic verifying method is invented, the scheduling personnel can store instruction lists of consecutive several days according to needs, the stored instruction lists are finally automatically issued to a distributed control system (DCS) for execution through an OPC communication mode.

Description

The online whole process dispatch command of a kind of oil product is assigned and verification method

Technical field

The present invention relates to crude oil, gasoline, diesel oil, naphtha, boat coal, lubrication wet goods oil product online whole process dispatch command assign and checking field, the online whole process dispatch command relating to oil product is assigned and verification method.

Background technology

Modern refineries scale is large, product category is many, for considering crude quality and Technological Economy, the cut oil product that the device such as Atmospheric vacuum, catalytic cracking is produced all can not directly meet the national multinomial quality index requirement to oil products such as gasoline, diesel oil, boat coals.In order to reach state quality standard requirement, reduce costs, economize energy etc., refinery often through adding various adjuvant to improve oil quality, the cetane number improver of such as diesel oil, antiwear agent, antistatic agent, the octane enhancing additive, antioxidant, antistatic agent etc. of gasoline.

In order to reach state quality standard requirement, not only need to add merely various oil quality improver, also need each distillate to mix by different proportion, make full use of the physics and chemistry character of different component oil, give full play to the performance of each component oil, finally reach state quality standard requirement.The further raising of gasoline, diesel oil, lubrication wet goods state quality standard, has promoted the development of Of The Oil Product Blending Process technology, and has greatly improved the quality of product.The upgrading of gasoline, diesel oil, lubrication wet goods state quality standard, makes refinery be that satisfied new quality requirements improves or drop into new equipment.For this reason, petroleum products blending means should be passed through, under the condition meeting respective oil quality index, the various basic components oil that will produce in production run to greatest extent, are undertaken withering conjunction by certain formula and produce the product oils such as minimum, the up-to-standard high-quality gasoline of cost, diesel oil, boat coal.

Summary of the invention

For overcoming the problems referred to above, the invention provides the online whole process dispatch command of a kind of oil product to assign and verification method, after each component is concocted according to a certain percentage, indices reaches state quality standard, refinery dispatcher needs to formulate the formula instruction of each blending batch, the instruction assigned must ensure accuracy, and in order to ensure continuous production, dispatcher generally needs the instruction list storing continuous several days, and the instruction list of storage needs again to be finally issued to actual in dcs DCS execution.

Concrete technical scheme is as follows:

The online whole process dispatch command of a kind of oil product is assigned and verification method, comprises the steps:

Select the database installed and used of factory or DCS and the existing database of PLC control system, dispatch command is set; The communication modes of described dispatch command and the described database installed and used adopts ODBC mode; OPC communication modes is adopted between described dispatch command and DCS or PLC control system;

The projects related to according to described dispatch command, in the process condition determination method of inspection of Oil Product Regulating production run, carry out reasonableness test according to the described method of inspection to described dispatch command;

The dispatch command be up to the standards is stored;

Assign dispatch command as requested and perform.

Described dispatch command comprise the formula lower limit of each component oil, the formula upper limit of each component oil, each component oil flux lower limit, each component oil flow upper limit, dispatch assign each component oil initial formulation, dispatch each component oil dipstick, total flow lower limit, the total flow upper limit assigned.

Get used to assigning the traditional operation custom of the receipts oil dipstick of each component to meet refinery dispatcher, the conversion method that described each component oil dipstick and scheduling are filled a prescription is such as formula shown in (1):

$P_i=\frac{M_i*O_i}{{\Σ}_{i=1}^n{M}_i*O_i}*100---\left(1\right)$

In formula, P _ifor the blending number percent of component oil i; M _ifor the dipstick of component oil i; O _iwhether expression component oil i participates in blending, and 0 represents participation blending, and 1 expression does not participate in blending; N is component oil total quantity.

Described scheduling formula meets the component stock shown in formula (2) or output constraint:

PMin _i≤P _i≤PMax _i(2)

In formula, PMin _irepresent the formula lower limit of i-th kind of component oil, PMax _irepresent the formula higher limit of i-th kind of component oil.

Described scheduling formula meets the material balance constraint shown in formula (3):

${\Σ}_1^n{P}_i=100---\left(3\right)$

In formula, P _ifor the blending number percent of component oil i, all components oil is concocted number percent and is 100.

The flow bound of each component oil meets following flow restriction:

(1) i-th kind of maximum flow SF that component oil can be arranged _{max, i}be not more than the maximum flow that process conditions allow

DF _{max, i}, that is: SF _{max, i}≤ DF _{max, i}(4)

(2) i-th kinds of minimum flow SF that component oil can be arranged _{min, i}be not less than the minimum flow that process conditions allow

DF _{min, i}, that is: SF _{min, i}>=DF _{min, i}(5)

(3) i-th kinds of minimum flow SF that component oil can be arranged _{min, i}, the maximum flow SF that this component oil can be arranged need be less than _{max, i}, that is: SF _{min, i}≤ SF _{max, i}(6)

House steward's flow after the blending of all components oil is satisfied retrains verification method as follows:

(1) the minimum flow sum that all components can be arranged is less than the maximum flow SF that house steward is arranged _max, that is:

${\&Sigma;}_{i=1}^n{\mathrm{SF}}_{Min,i}*O_i<{\mathrm{SF}}_{Max}---\left(7\right)$

(2) the maximum flow sum that all components can be arranged is greater than the minimum flow SF that house steward is arranged _min, that is:

${\&Sigma;}_{i=1}^n{\mathrm{SF}}_{Min,i}*O_i>{\mathrm{SF}}_{Min}---\left(8\right)$

(3) the minimum flow SF of house steward's setting _minnumerical value is less than the maximum flow SF that house steward is arranged _max, that is:

SF _Min＜SF _Max(9)

Described dispatch command is positive number, and dispatch command numerical value soundness verification mode is: instruction is numeric format and numerical value is positive real number.

Compared with prior art, method of the present invention has following advantage:

Dispatch command is saved in the middle of DCS system database, and by odbc database standard interface and OPC real-time communication mode, dispatch command is stored and revises.Stock's constraint, material balance constraint, traffic constraints and numerical value rationality are verified simultaneously, ensure the accuracy assigning instruction, the formula instruction that The inventive method achieves blending process, from the automation process verifying, store, be modified to execution, can ensure contiguity and the accuracy of producing blending instruction.

Accompanying drawing explanation

Fig. 1 is storage and the data transmission stream journey figure of dispatch command.

Embodiment

Below for the on-line blending technological process having 7 kinds of blending component oil, the online whole process dispatch command of a kind of oil product that the present invention proposes is assigned and verification method carries out case analysis.

As shown in Figure 1, the storage of present case dispatch command adopts database mode, the communication modes of dispatch command and database adopts ODBC mode, OPC communication modes is adopted between dispatch command and DCS or PLC control system, ODBC mode and OPC mode communication letter road are all transmitted in both directions, have good dirigibility and versatility.

As shown in table 1 traffic orders instruction is set, contain petroleum products blending device and normally run required all information, comprising: the formula lower limit of each component oil, the formula upper limit of each component oil, each component oil flux lower limit, each component oil flow upper limit, dispatch assign each component oil initial formulation, dispatch each component oil dipstick, total flow lower limit, the total flow upper limit assigned.

Table 1 dispatch command list

As shown in Figure 1, the dipstick proposed according to the present invention and the conversion method of formula, dipstick change after formula be: component 1 number percent is 7.16, component 2 number percent is 33.58, component 3 number percent is 7.74, and component 4 number percent is 11.83, and component 5 number percent is 0, component 6 number percent is 39.69, and component 7 number percent is 0.

Apply method of the present invention, instruction reasonableness test carried out to the dispatch command that dispatcher assigns:

1) by dispatching fill a prescription and fill a prescription lower limit and formula upper limit row, component stock or output constraint that formula meets refinery is dispatched as seen;

2) scheduling quality meets material balance constraint, and all scheduling are filled a prescription and are 100;

3) each component oil flow bound, meets the flow restriction of process operation:

As shown in Table 1: flow upper limit row and technique flow upper limit row, the maximum flow that often kind of component oil can be arranged all is less than the maximum flow of process conditions permission;

As shown in Table 1: flux lower limit row and technique flux lower limit row, the minimum flow that often kind of component oil can be arranged all is greater than the minimum flow of process conditions permission;

As shown in Table 1: flux lower limit row are all less than flow upper limit row, and the minimum flow that often kind of component oil can be arranged all is less than the maximum flow that this component can be arranged;

4) blending house steward's flow and each composition flow rate are restricted to:

As shown in Table 1: the minimum flow sum that all components that flux lower limit list is shown can be arranged is 46, is less than the total flow upper limit 800;

As shown in Table 1: all components maximum flow sum 1157 is greater than total flow lower limit 300;

As shown in Table 1: the minimum flow 300 that house steward is arranged is less than the maximum flow 800 that house steward is arranged.

As shown in Table 1: in instruction, all items all meets numerical value soundness verification.

Be only the preferred embodiment of invention in sum, be not used for limiting practical range of the present invention.Namely all equivalences done according to the content of the present patent application the scope of the claims change and modify, and all should be technology category of the present invention.

Claims (8)

1. the online whole process dispatch command of oil product is assigned and a verification method, it is characterized in that, comprises the steps:

Select the database installed and used of factory or DCS and the existing database of PLC control system, dispatch command is set;

The communication modes of described dispatch command and the described database installed and used adopts ODBC mode;

OPC communication modes is adopted between described dispatch command and DCS or PLC control system;

The projects related to according to described dispatch command, in the process condition determination method of inspection of Oil Product Regulating production run, carry out reasonableness test according to the described method of inspection to described dispatch command;

The dispatch command be up to the standards is stored;

Assign dispatch command as requested and perform.

2. method according to claim 1, it is characterized in that, described dispatch command comprise the formula lower limit of each component oil, the formula upper limit of each component oil, each component oil flux lower limit, each component oil flow upper limit, dispatch assign each component oil initial formulation, dispatch each component oil dipstick, total flow lower limit, the total flow upper limit assigned.

3. method according to claim 2, is characterized in that, the conversion method that described each component oil dipstick and scheduling are filled a prescription is such as formula shown in (1):

In formula, P _ifor the blending number percent of component oil i; M _ifor the dipstick of component oil i; O _iwhether expression component oil i participates in blending, and 0 represents participation blending, and 1 expression does not participate in blending; N is component oil total quantity.

4. method according to claim 3, is characterized in that, described scheduling formula meets the component stock shown in formula (2) or output constraint:

PMin _i≤P _i≤PMax _i(2)

In formula, PMin _irepresent the formula lower limit of i-th kind of component oil, PMax _irepresent the formula higher limit of i-th kind of component oil.

5. method according to claim 3, is characterized in that, described scheduling formula meets the material balance constraint shown in formula (3):

In formula, P _ifor the blending number percent of component oil i, all components oil is concocted number percent and is 100.

6. method according to claim 3, is characterized in that, the flow bound of each component oil meets following flow restriction:

(1) i-th kind of maximum flow SF that component oil can be arranged _{max, i}be not more than the maximum flow DF that process conditions allow _{max, i}, that is: SF _{max, i}≤ DF _{max, i}(4)

(2) i-th kinds of minimum flow SF that component oil can be arranged _{min, i}be not less than the minimum flow DF that process conditions allow _{min, i}, that is: SF _{min, i}>=DF _{min, i}(5)

(3) i-th kinds of minimum flow SF that component oil can be arranged _{min, i}, the maximum flow SF that this component oil can be arranged need be less than _{max, i}, that is: SF _{min, i}≤ SF _{max, i}(6).

7. method according to claim 3, is characterized in that, the house steward's flow after the blending of all components oil is satisfied retrains verification method as follows:

(1) the minimum flow sum that all components can be arranged is less than the maximum flow SF that house steward is arranged _max, that is:

(2) the maximum flow sum that all components can be arranged is greater than the minimum flow SF that house steward is arranged _min, that is:

(3) the minimum flow SF of house steward's setting _minnumerical value is less than the maximum flow SF that house steward is arranged _max, that is:

SF _Min＜SF _Max(9)。

8. method according to claim 3, is characterized in that, described dispatch command is positive number, and dispatch command numerical value soundness verification mode is: instruction is numeric format and numerical value is positive real number.