JPH08285200A - In-piping staying oil control device - Google Patents

Abstract

PURPOSE: To accurately classify a kind of oil even in a small quantity of staying oil by classifying the transport total quantity into large quantity transport and small quantity transport by a transport oil quantity comparing part, performing operation on piping staying oil by using a large quantity transport staying oil operation part and a small quantity transport staying oil operation part, and setting up sections in the number according to a kind of oil when a kind of oil is switched in the middle of the sections. CONSTITUTION: When the transport total quantity in delivering-receiving work at this time is more than the total capacity of a route piping part 30, it is judged as large quantity transport, and when the transport total quantity is less than the total capacity, it is judged as small quantity transport, by a transport oil quantity comparing part 50. In the large quantity transport, operation is performed by using large quantity transport staying oil operation part 60, and in the small quantity transport, operation is performed by using a small quantity transport staying oil operation part 70, and when a kind of oil is switched in the middle of sections, a slave section setting-up control part 80 sets up slave sections in the number according to a kind of oil of the section, and controls a kind of oil, a quantity of oil and piping order in the flowing direction. Therefore, a kind of oil can be accurately classified even in a small quantity of staying oil.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe oil retention management apparatus suitable for use in equipment in which a large amount of oil is trapped in a pipe, such as an oil storage base, and in particular, accurately collects oil retention information in the pipe. Manage improvements.

[0002]

[Prior Art] Oil storage bases in Dubai, Arabia,
Crude oil is transported by tanker from Indonesia etc. and stored in a storage tank. Since the composition and price of crude oil vary depending on the place of production, whether it is light oil or heavy oil, or whether the content of sulfur is high becomes a concern when refining oil. Therefore, a technique for managing oil retention in piping as disclosed in Japanese Patent Application Laid-Open No. 2-217700 and Japanese Patent Application Laid-Open No. 4-302800 is used.

[0003] Fig. 6 is a block diagram for explaining an oil payout / acceptance work at an oil stockpiling base, (A) is an equipment block diagram within the oil stockpiling base, and (B) is a section control diagram of the main pipe. In the figure, the cargo handling facility 2 is connected to the tanker 3 which is anchored at the anchor position inside the port, and the oil is sent to the six tanks TK1 to TK6. The landing root oil, cargo handling facility 2 and the flow meter F _1, a main pipe 1b which connects the F _2, tank 4 pumps P ₁ to P ₄ and 6 groups are connected in parallel TK1
Main pipe 1a is used to connect between 6 and 6. The branch pipes 4a and 4b are pipes branched from the main pipe 1a.

The sections A to F of the main pipe are each tank TK.
The connection points of the branch pipes from 1 to 6, the connection points of the branch pipes 4a and 4b, and the insertion points of the pumps P _{1 to} P ₄ are divided into 6 sections with each section as a boundary. In the section A, the amount of oil remaining in the main piping 1b from the cargo handling facility 2 to the pump is 800 kl,
In the section B, the amount of oil stagnation from the pump of the main pipe 1a to the branch pipe 4b is 400 kl, and in the section C, from the branch pipe 4b of the main pipe 1a to the branch pipe 4a, the amount of oil stagnation is 200 k.
1, the section D is from the branch pipe 4a of the main pipe 1a to the branch pipes of the tanks TK5, 6 with an amount of oil storage of 300 kl, and the section E is the branch pipes of the tanks TK5, 6 and the tanks TK3, 4 of the main pipe 1a. Between the tanks TK3 and 4 of the main pipe 1a and the tank T
The amount of oil remaining between the K1 and 2 branch pipes is 260 kl.

FIG. 7 is an explanatory diagram of the oil retention state for each section when oil is transferred from one tank to the other tank through a pipe. (A) is the oil retention state before the start of work, (B) Shows an illustration of the material balance of the oil to be transferred, and (C) shows the oil retention state after the end of the work. The sections A to F are arranged in this order from the downstream side with respect to the oil flow direction. The oil retention state before the start of work is as follows: Section A has an oil retention amount of 100 kl and oil retention oil type a, Section B has an oil retention oil amount of 300 kl and oil retention oil type b, and Section C has an oil retention oil amount. Is 200 kl and the oil-holding oil type is c, the section D is 500 kl and the oil-holding oil type is d, the section E is 600 kl and the oil-holding oil type is e, and the section F is the oil-holding oil Quantity 3
The oil retention type is f at 00 kl.

As an acceptance work, the oil amount is 1 and the oil amount is 1
It is assumed that 000 kl of oil is sent from the section F of this pipe in the direction of section A. Then, from the continuity of the amount of oil in the pipe and the material balance, the oil retention state after the completion of the receiving work is as follows. First, regarding the oil sent from the section A to the receiving tank, the oil amount a is 100 kl and the oil type b is 300 k.
1, oil type c has an oil amount of 200 kl, oil type d has an oil amount of 400 kl
Has become. And in section A, the amount of oil retention is 100 kl
The oil retention oil type is d, the oil retention oil amount in section B is 300 kl and the oil retention oil type is e, the oil retention oil amount in section C is 200 kl and the oil retention oil type is e, and the oil retention oil amount is in section D At 500 kl, the ratio of retained oil is e: f: g is 100: 300: 100. In the section E, the amount of retained oil is 600 kl and the retained oil type is g, and in the section F, the retained oil amount is 300 kl and the retained oil type is g.

[0007]

However, the section D in FIG.
When oil of multiple oil types is stagnant in one section like
There is a problem that the type of oil inside the pipe becomes unclear if it is controlled by the oil type ratio. In the past, crude oil of a small number of oil species such as Arabian Light was stored in a large tanker like the national stockpiling, and the frequency of paying out and receiving the crude oil stored in the tank was rare, so it is sufficient to manage by the oil type ratio. Met. However, in the case where crude oil of many oil types is handled by small and medium-sized tankers such as private stockpiling, and the delivery and acceptance of crude oil is frequently performed due to price fluctuations, etc., it is desired to know the oil type accurately, even if it is about several hundred kl. There was a request.

The present invention has solved such a problem. Even when a large amount of crude oil of a large number of oil types is frequently delivered and received using small and medium tankers as in the case of private stockpiling, even when a small amount of oil is stored, oil can be stored. It is an object of the present invention to provide a pipe oil retention management device that can accurately identify the species.

[0009]

According to the present invention for achieving the above object, an oil storage state of a route pipe portion 30 which is a route for transporting oil from a delivery oil storage portion 10 such as a tanker or a tank to a receiving oil storage portion 20 is provided. In the piping oil retention management device shown, the connection point of the branch pipeline from each tank of the root piping section, the connection point of the piping branched from the root piping section, the insertion point of the pump, etc. A route piping section management unit 40 that stores the capacity, a transportation oil amount comparison unit that determines whether a large amount of transportation or a small amount of transportation is performed by comparing the total amount of transportation in the present payout / acceptance work and the total volume of the route piping unit. 50, and when it is judged by the transported oil amount comparison unit that a large amount of transportation is being carried out, the total amount of oil remaining in the route piping unit and the amount of oil dispensed Co in the delivery oil storage unit in the previous delivery are calculated from the total amount of transportation in this time and the total amount in the route piping unit. capacity Is sent to the receiving oil storage section, and at the same time the amount of oil remaining in the route piping section is used as the type of oil to be delivered from the delivering oil storage section.
When the transport oil amount comparison unit determines that the transport amount is a small amount, the oil stored in the downstream section of the oil stored in the previous route piping unit is sent to the receiving oil storage unit and the route piping installed this time. Among the oil retention from the previous time, the oil retention from the previous time moved to the downstream side of the route piping section and remains, and the small amount transportation oil retention calculation section 7 which is the oil newly discharged from the oil storage section for delivery.
0, and in this small amount transport oil retention calculation unit, when a plurality of oil types exist in each section, a child section creation management unit 80 that creates a child section corresponding to the position in the flow direction of each oil type. It is characterized by having.

[0010]

According to the configuration of the present invention, the transportation oil amount comparison unit 50 determines that the transportation amount in the present payout / acceptance work is larger than the total capacity of the route piping portion, and if the transportation amount is small, the transportation amount is small. In the mass transportation, all the oil stagnation in the pipes is the oil type sent from the oil storage unit 10 in the present dispensing work, so the oil stagnation calculation unit 60 is used. In small-quantity transportation, oil spillage in the pipe exists in the oil spill upstream from the previous oil stagnation, and the oil type sent from the oil storage unit 10 in the present dispensing work coexists. . Pipe oil retention management divides the route piping section into a plurality of sections to manage the amount of oil and the type of oil. When the type of oil switches in the middle of this section, the child section creation management unit 80 In order to manage the oil type, the amount of oil, and the arrangement order with respect to the flow direction, a number of child sections are created according to the oil type.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG.
FIG. 1 is a configuration block diagram of an oil storage terminal facility and a pipe oil retention management device showing an embodiment of the present invention. In the figure, as a facility of an oil stockpiling base, there is a route piping unit 30 that serves as a route for transporting oil from a delivery oil storage unit 10 such as a tanker or a tank to a receiving oil storage unit 20. The route piping unit 30 is a main piping used for the oil transportation of this time in the pipeline network installed in the base.

The piping oil retention management device has a route piping section management section 40, a transportation oil quantity comparison section 50, a large transportation oil retention calculation section 60, a small transportation oil retention calculation section 70, and a child section establishment management section 8 here. are doing. Route piping section management unit 40
Is each section N1 defined as a boundary recognizable from the facility such as a connection point of a branch pipe from each tank of the root piping section, a connection point of a piping branched from the root piping section, a pump insertion point, etc. The capacity V1 to Vn of Nn is stored. The transported oil amount comparing unit 50 compares the total transport amount Vo in the present payout / acceptance work with the total capacity ΣVi of the route piping unit to determine whether the transport amount is large or small.

When the transportation oil amount comparison unit 50 determines that the transportation amount is large, the heavy transportation oil retention calculation unit 60 calculates the total oil retention ΣVi of the previous route piping portion and the delivery oil type component of the delivery storage unit 10. Regarding Co, the oil amount obtained by subtracting the total capacity ΣVi of the route piping part from the total transport amount Vo of this time is received
The oil that has been sent to the oil storage section 10 is sent out from the oil storage section 10 and discharged from the oil storage section 10. When the transportation amount comparison unit 50 determines that the transportation amount is a small amount, the small amount transportation oil storage calculating unit 70 receives the oil storage located in the downstream side of the oil storage of the previous route piping unit 30 and receives the oil storage unit. The oil stored in the route piping section 10 this time is the oil remaining in the oil stored in the route piping section 30 that has moved to the downstream side of the route piping section 30 among the oil storage from the previous time, and the oil newly discharged from the payout oil storage section 10. And In the small-quantity transportation oil retention calculating unit 70, the child section establishment management unit 80 creates a child section in correspondence with the position in the flow direction of each oil type when a plurality of oil types exist in each section. When the oil transportation of this time is completed, the oil retention management device for pipes allows the amount of oil retained in each section of the route piping unit 30 and the oil type, and when a plurality of oil types coexist in one section, a more detailed description will be given to the child section. Since the information is described, it is advisable to update the contents of the tank history file and the pipe oil retention file.

Next, the calculation contents will be concretely described using a model diagram of oil transportation. FIG. 2 is an explanatory diagram of a route piping unit 30 that serves as a route for transporting oil from the payout storage unit 10 to the receiving storage unit 20. The liquid level of the dispensing oil storage unit 10 was L1 at the start of transportation this time, but was L2 at the end of transportation.
Has fallen to. At this time, the total amount of transportation becomes the fixed quantity Vo, and the oil type is the delivered oil type Co stored in the delivered storage section 10. The liquid level of the receiving oil storage section 20 was L3 at the start of the current transportation, but has risen to L4 at the end of the transportation. The route piping unit 30 is the route piping section management unit 4
It is divided into n sections by 0, each section is given a section number Ni (1 ≦ i ≦ n) from the upstream side, and each section Ni has an oil storage capacity Vi (1 ≦ i ≦ n). And oil retention oil type C
i (1 ≦ i ≦ n) is managed.

FIG. 3 is a flow chart of the calculation process of the pipe oil retention management device. First, the transport oil amount comparison unit 50 calculates the total transport amount Vo in the present delivery / acceptance work and the route piping unit 3
The total capacity .SIGMA.Vi of 0 is compared with each other, and the case is classified according to the size relationship, and it is determined whether it is a large quantity transportation or a small quantity transportation. The large-volume transport oil retention calculation unit 60 is in charge of large-volume transport, and the small-volume transport oil retention calculation unit 70 is in charge of small-volume transport. As a special case, when the total transportation amount Vo and the total capacity ΣVi of the route piping portion 30 match, a part of the function of the heavy transportation oil retention calculating portion 60 is used here.

First, in the case of a large amount of transportation (Vo> ΣVi), all the oil types of all sections N1 to Nn of the route piping section management section 40 are all delivered and the delivery oil type Co stored in the oil storage section 10 is delivered.
(S11). Then, it is assumed that the oil types in all the sections N1 to Nn at the start of transportation this time have entered the receiving oil storage section 20 (S
12). Further, regarding the oil type Co delivered from the delivered oil storage section 10, it is assumed that an oil volume (Vo-ΣVi) obtained by subtracting the total volume of the route piping section from the total transport volume of this time is stored in the received oil storage section 20 (S13). The total transport volume Vo and route piping 3
When the total capacity ΣVi of 0 is substantially the same, S11,
The same calculation as S12 may be performed (S21, S22).

Next, in the case of small-quantity transportation (Vo <ΣVi), the section Nk (1 ≦ k ≦, which is filled with the pay-out oil type Co of the route piping section 30 by the total amount of transportation Vo in the present payout / acceptance work. n-1), and the surplus oil amount Vr corresponding to the position where the dispensed oil type Co has stopped in the downstream section Nk + 1 adjacent thereto (S31). Then, the oil types of the sections N1 to Nk of the route piping section management unit 40 are paid out.
(S32). Since the dispensed oil type Co and the oil type C1 existing in the previous section N1 coexist in the section Nk + 1, the child section creation management unit 80 creates a child section, and the child section Nk on the upstream side of the section Nk + 1. +1,1 is the oil amount Vr and the oil type is the payout oil type Co (S33).

Further, in the section Nk + 1 to the section Nn of the route piping portion 30, the oil amount C1 to Cm (1≤m≤n) is the oil amount (ΣVi-Vo) existing in the section N1 to Nm from the upstream side to the previous section. -K
+1) will lose oil. Therefore, the child section Nk + 1,2 on the downstream side of the section Nk + 1 and the sections Nk + 2 to N on the downstream side thereof
For n, the amount of oil that existed in the previous section N1 to Nm (ΣV
Oil types C1 to Cm are arranged at i-Vo (S34). At this time, when a plurality of oil types coexist in a certain section, the child section creation management unit 80 creates a child section to manage the oil retention oil type and the oil amount.

Finally, the type of oil and the amount of oil having entered the receiving oil storage section 20 will be examined. From the material balance, from the upstream side, the oil amount Cm + 1 to Cn due to the amount of oil existing in the previous section Nm + 1 to Nn, as well as the portion of the oil type present in the section Nm that does not become a pipe oil stagnant in S34, are received. Enter the oil storage section 20. This oil amount is Vo according to the definition (S35). Then, the contents of the tank history file and the pipe oil retention file are updated based on this calculation result.

FIG. 4 is an explanatory view of a large amount of transportation, where (A) shows the oil retention state at the start of this transportation and (B) at the end of this transportation. Here, AL represents Arabian Light, KF represents Kafji, and DB represents Dubai. At the start of transportation this time, the oil type AL is 100,000 kl in the payout oil storage section 10.
The oil is stored, and the oil type AL is 5000 in the receiving oil storage unit 20.
It is assumed that 0 kl has been stored. Route piping section management unit 40
Thus, the route piping section 30 is divided into sections 1 to 3. The amount of oil remaining in Section 1 is 3000 kl, which is divided into three subsections here. Child section 1-1 has 1000 kl oil type AL
Oil has accumulated, and the child section 1-2 has 1000 kl of oil type DB, and the child section 1-3 has 1000 kl of oil type AL. The amount of oil remaining in Section 2 is 2000 kl, which is divided into two subsections here. The child section 2-1 has 1000 kl of oil type AL and the child section 2-2 has 1000 kl of oil type KF. The amount of stagnant oil in Section 3 is 1000 kl, which is oil type AL.

At the end of the current transportation, 90000 kl of the oil type AL has been stored in the payout storage section 10, and the receiving storage section 2
A total of 60,000 kl of oil is stored in 0. Therefore, the amount of oil transported is 100.
The amount is 00 kl, which is larger than the total capacity of the route piping section 30 of 6000 kl, which corresponds to mass transportation. Therefore, in the route piping section 30, the oil type AL stays 3000 kl in the section 1, and the oil type AL in the section 2
2000 kl has been stagnation, and Section 3 has 1000 kl of oil type AL. In addition, the amount of oil stored by the oil type of the receiving oil storage unit 20 is the oil type A.
L is 58,000 kl, oil type KF is 1000 kl, and oil type DB is 1000 kl.

FIG. 5 is an explanatory view of small-quantity transportation. FIG. 5A shows an oil retention state at the time of starting the transportation of this time and FIG. 5B at the end of the transportation of this time. Here, at the time of starting the transportation this time, FIG. 4 (A)
Is the same as. At the end of this transportation, 95500 kl of the oil type AL has been stored in the payout storage section 10, and a total amount of 54500 kl has been stored in the receiving storage section 20. Therefore, the amount of transported oil is 4,500 kl, which is smaller than the total capacity of 6000 kl in the route piping section 30, which corresponds to a small amount of transportation. The amount of oil transported is 45
00kl means that the oil type AL reaches a part of section 2 (S31). As for the section 2, the child section 2-1 is the oil from the payout oil storage section 10, and the child section 2-2 is the oil of the section 1-1 at the start (S33). However, child section 2
In -1, 2-2, since the oil type is the same as AL, the child sections are integrated and treated as section 2. As a result, in the route piping section 30, the section 1 had 3000 kl of the oil type AL, the section 2 had 2,000 kl of the oil type AL, and the section 3 had 500 kl of the oil type AL. 500 kl oil type DB stagnant child section 3
-2 (S34). In addition, the amount of oil stored in the oil storage unit 20 for each oil type is 53000 kl for oil type AL and KF for oil type.
Is 1000 kl and the oil type DB is 500 kl (S35).

According to the above embodiment, the creation of the child section has been described by using the case where a plurality of oil types are present in one section. However, an oil that is mixed with different oils accompanying transportation Can also be managed by using a child section, and when the owner is different for the same oil type, a child section may be provided for each owner. Furthermore, even if the conditions for establishing a child section are satisfied, if the oil types of adjacent child sections are the same or the amount of oil in the child section is small, the child section integration processing may be performed.

[0024]

As described above, according to the present invention, if the total amount of transportation in the present delivery / acceptance work is larger than the total capacity of the route piping portion by the transportation oil amount comparing unit 50, it is large-volume transportation, and if it is small, it is small-volume transportation. Since the large-fluid-transportation-oil-holding calculation unit 60 and the small-quantity-transportation-oil-holding-calculation unit 70 share the determination to perform the pipe oil holding calculation, the calculation work can be easily performed. Further, when the oil type is switched in the middle of the section, the child section creation management unit 80 creates child sections of the number corresponding to the oil type in the section, and the arrangement order with respect to the oil type, the oil amount, and the flow direction is set. Since they can be identified, even a small amount of oil can be surely distinguished, which is suitable for small-lot transportation.

[Brief description of drawings]

FIG. 1 is a block diagram of a petroleum stockpiling base facility and a pipeline oil retention management device according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a route piping unit 30 that serves as a route for transporting petroleum from the payout oil storage unit 10 to the receiving oil storage unit 20.

FIG. 3 is a flowchart of a calculation process of a pipe oil retention management device.

FIG. 4 is an explanatory diagram of mass transportation.

FIG. 5 is an explanatory diagram of small-quantity transportation.

FIG. 6 is a configuration diagram for explaining an oil payout / acceptance work at an oil stockpiling base.

FIG. 7 is an explanatory diagram of an oil retention state for each section when oil is transferred from one tank to the other tank through a pipe.

[Explanation of symbols]

 10 Dispensing oil storage section 20 Receiving oil storage section 30 Route piping section 40 Route piping section management section 50 Transportation oil amount comparison section 60 Large amount transportation oil retention calculation section 70 Small amount transportation oil retention calculation section 80 Child section establishment management section

Claims (1)

[Claims] 1. A payout oil storage section (1) for a tanker, a tank, or the like.
0) In the oil retention management apparatus for indicating the oil retention state of the route piping section (30) which is a route for transporting oil from the receiving oil storage section (20), the connection of the branch pipeline from each tank of the root piping section point,
The route piping section management unit (40) that stores the capacity of each section defined by the connection points of the piping branched from the root piping section, the insertion point of the pump, etc. as a boundary, and the total amount of transportation in this delivery / acceptance work , The total quantity of the route piping section is compared to judge whether it is a large quantity transportation or a small quantity transportation, and the transportation oil quantity comparing section (50), and when this transportation oil quantity comparing section judges a large quantity transportation, Regarding the total amount of oil remaining in the route piping section and the type of oil (Co) delivered in the delivery storage section, the oil amount obtained by subtracting the total volume of the route piping section from the total transport volume of this time is sent to the receiving oil storage section and When a large amount of oil retention calculation unit (60) that uses the oil remaining in the route piping unit as the type of oil to be dispensed from the dispensing oil storage unit and this transportation oil amount comparison unit determines a small amount of transportation, Located in the downstream section of the retained oil The accumulated oil is sent to the receiving oil storage section, and the oil accumulated in the route piping section this time moves to the downstream side of the route piping section among the oil accumulated from the previous time and remains. Small amount transportation oil retention calculation part (70) to be used as discharged oil
And in this small amount transportation oil retention calculation unit, when there are a plurality of oil types in each section, a child section creation management unit (80) that creates a child section corresponding to the position of each oil type in the flow direction. A pipe oil retention management device comprising: