Drug injection amount management method and drug injection amount management device

Abstract

To provide a drug injection amount management method or the like capable of effectively coping with a change in a composition of crude oil types.SOLUTION: A drug injection amount management method includes an acquisition step for acquiring crude oil types composing a crude oil and their ratios, a prediction step for inputting the crude oil types and their ratios acquired by the acquisition step in a computer and predicting an index value indicating a correlation to stain or corrosion by a calculation of a calculation formula executed by a program on the computer, and a management step for managing an injection amount of a stain preventing agent or a corrosion inhibitor on the basis of a prediction result by the prediction step.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a drug injection amount management method and a drug injection amount management device. [Background technology]

[0002] Patent Document 1 discloses the use of a fouling inhibitor having a composition corresponding to the H / C atomic ratio of the fouling on the heat exchanger for the purpose of preventing the fouling of the heat exchanger in a petroleum process. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2022-004434 Brochure Summary of the Invention [Problem to be solved by the invention]

[0004] In an oil refinery, various petroleum products are produced using crude oil as a raw material. There are many types of crude oil, and the composition of the crude oil type is changed periodically (for example, once every 3 to 5 days).

[0005] On the other hand, it is also empirically known that the severity of fouling of heat exchangers used in the refining process of an oil refinery changes according to changes in the composition of crude oil types. Fouling of heat exchangers is not only affected by a certain crude oil type. In other words, the severity of fouling changes depending on the combination of crude oil types. An example of an index value that indicates the fouling susceptibility that differs depending on the combination of crude oil types is the S value described in ASTM D7157-09. This S value can be obtained as an analysis result when crude oil is measured using an analytical device.

[0006] However, when analyzing S-values ​​using an analytical device, it is necessary to take samples, transport them, and measure them. This poses the problem that it takes time to manage the injection amount based on the measurement results. In other words, even if the S-value of new crude oil is analyzed, in an oil refining plant that operates 24 hours a day, 365 days a year, it is not possible to manage the injection amount of antifouling agent before switching to the next crude oil type composition, and the analysis results cannot be used effectively.

[0007] Similar problems also apply to the control of the dosage of corrosion inhibitors used in oil refineries.

[0008] Therefore, in one aspect, the present invention aims to provide a method of managing the amount of chemical injection that can effectively respond to changes in the composition of crude oil types. [Means for solving the problem]

[0009] In one embodiment, An acquisition step of acquiring crude oil types constituting the crude oil and their ratios; a prediction step of inputting the crude oil type and its ratio acquired in the acquisition step into a computer and predicting an index value showing a correlation with fouling or corrosion by calculation of a calculation formula executed by a program on the computer; The present invention provides a method for managing the amount of an antifouling agent or an anticorrosion agent injected, the method comprising the steps of: (a) managing the amount of an antifouling agent or an anticorrosion agent injected based on the prediction result obtained by the prediction step; Effect of the Invention

[0010] According to one aspect, the present invention makes it possible to provide a method for managing the amount of chemical injection that can effectively respond to changes in the composition of crude oil types. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a diagram showing the configuration of a drug injection amount management device according to the present embodiment. [Diagram 2] 2 is a diagram illustrating an example of the hardware configuration of a drug injection amount management device. FIG. [Diagram 3] 13 is a flowchart showing the processing in the drug injection amount management device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] In the present disclosure, a calculation formula is statistically created based on index values ​​indicating past susceptibility to contamination or corrosion obtained by analysis and the crude oil type at that time. Also, the created calculation formula is used to calculate (predict) index values ​​for a new crude oil type composition. This makes it possible to obtain the index by calculation prior to switching the crude oil type composition, and the obtained index value can be effectively used.

[0013] In this disclosure, the term "heat exchanger" refers to a heat exchanger used in petroleum processes. Examples of heat exchangers include preheat exchangers (also called preheating heat exchangers or preheat exchangers), preheaters, and reboilers.

[0014] In this disclosure, "fouling" refers to fouling that includes asphaltene and other organic polymeric components, or fouling that includes asphaltene and other components that adhere and / or accumulate within a heat exchanger.

[0015] In this disclosure, "prevention of fouling" may include treating the heat exchanger with a chemical to prevent the adhesion of fouling to the heat exchanger by forming a film on the iron-based metal surface of the heat exchanger, or dispersing the fouling with a chemical to prevent the fouling from adhering to the heat exchanger. For example, the compounds disclosed in Japanese Patent No. 6485598 are effective as fouling prevention chemicals, but are not limited to these compounds. In this disclosure, "prevention of fouling" includes preventing fouling generated within the heat exchanger from adhering to the heat exchanger.

[0016] In the present disclosure, the index value of fouling tendency is not limited to the S value. As the index value of fouling tendency, a wide range of values ​​having a correlation with the stability of asphaltene can be used.

[0017] In addition, the present disclosure creates a calculation formula based on an index value that shows a correlation with corrosion and the crude oil type at that time. In addition, the created calculation formula is used to statistically calculate (predict) an index value for a new crude oil type composition. This makes it possible to obtain the index by calculation prior to switching the crude oil type composition, and the obtained index value can be used effectively.

[0018] In the present disclosure, "corrosion" includes corrosion of the top of the atmospheric distillation tower. A known cause of corrosion is hydrolysis of chlorides contained in crude oil to hydrogen chloride, which dissolves in the condensed water at the top of the tower to produce hydrochloric acid. Therefore, a formula showing an index value according to the ratio of the chloride ion concentration contained in the condensed water at the top of the atmospheric distillation tower may be used as a calculation formula. In the present disclosure, the index value of the corrosion severity is not limited to the chloride ion concentration contained in the condensed water at the top of the atmospheric distillation tower.

[0019] In this disclosure, "corrosion inhibitors" can include coating agents and neutralizing agents.

[0020] In the present disclosure, the part of the equipment that is subject to corrosion is arbitrary, but the part may include the top of the atmospheric distillation tower. In addition, the part may include a side reflux, a top reflux, a top pipe connected to the top of the atmospheric distillation tower, an air fin cooler, a condenser, etc.

[0021] Hereinafter, the information processing apparatus of this embodiment will be described with reference to the drawings.

[0022] FIG. 1 is a diagram showing the configuration of an information processing apparatus according to this embodiment.

[0023] As shown in FIG. 1, an information processing device 10 of this embodiment includes an acquisition unit 11, a prediction unit 12, a management unit 13, and an information storage unit 14.

[0024] The acquisition unit 11 acquires the crude oil types constituting the support target crude oil and their ratios. The support target crude oil means the crude oil for which support information is generated, which will be described later. The crude oil types and their ratios may be input by a user. The input method is arbitrary, and may be realized via the input unit 107 shown in FIG. 2, which will be described later.

[0025] The prediction unit 12 inputs the crude oil type and its ratio acquired by the acquisition unit 11 into a calculation formula, and calculates a parameter value (corresponding to an index value) having a correlation with the stability of asphaltene, or a parameter value (corresponding to an index value) according to the chloride ion concentration of the condensate at the top of the atmospheric distillation tower derived from the crude oil. The calculation formula may be stored in the information storage unit 14. A specific example of the calculation formula will be described later.

[0026] The management unit 13 generates and outputs support information regarding the injection of a chemical into a certain crude oil based on the value of a parameter correlated with the stability of asphaltene predicted by the prediction unit 12, or the value of a parameter corresponding to the chloride ion concentration of the condensate at the top of the atmospheric distillation tower derived from the crude oil. The support information relates to the injection of a chemical into the supported crude oil. For example, the support information relates to the amount of chemical to be injected. The chemical may be a maintenance chemical for equipment or parts that handle the supported crude oil in an oil refining plant, such as a fouling inhibitor or a corrosion inhibitor.

[0027] The information storage unit 14 stores various information and calculation formulas related to the operation of the information processing device 10.

[0028] The information processing device 10 can be configured using one or more computers that have a specific program installed. The calculation formula for calculating the parameter value can be updated as necessary. In this case, the updated calculation formula may be transferred from an external server to the information storage unit 14 of the information processing device 10.

[0029] FIG. 2 is a diagram illustrating an example of a hardware configuration of an information processing device.

[0030] In the example shown in FIG. 2, the information processing device 10 includes a control unit 101, a main memory unit 102, an auxiliary memory unit 103, a drive device 104, a network I / F unit 106, and an input unit 107.

[0031] The control unit 101 is a calculation device that executes programs stored in the main memory unit 102 and the auxiliary memory unit 103, and receives data from the input unit 107 or a storage device, calculates and processes it, and outputs it to a storage device or the like.

[0032] The main storage unit 102 is a read only memory (ROM), a random access memory (RAM), etc. The main storage unit 102 is a storage device that stores or temporarily saves programs and data, such as an operating system (OS), which is basic software executed by the control unit 101, and application software.

[0033] The auxiliary storage unit 103 is a storage device such as a hard disk drive (HDD) or a solid state drive (SSD) that stores data related to application software and the like.

[0034] The drive device 104 reads out a program from a recording medium 105, for example a flexible disk, and installs it in a storage device.

[0035] A predetermined program is stored in the recording medium 105. The program stored in the recording medium 105 is installed in the information processing device 10 via the drive device 104. The installed predetermined program can be executed by the information processing device 10.

[0036] The network I / F unit 106 is an interface between the information processing device 10 and peripheral devices having a communication function connected via a network established by a data transmission path such as a wired and / or wireless line.

[0037] The input unit 107 includes a keyboard equipped with cursor keys, numeric input keys and various function keys, a mouse, a touch pad, and the like.

[0038] In the example shown in FIG. 2, various processes described below can be realized by making the information processing device 10 execute a program. It is also possible to record the program in a recording medium 105 and make the information processing device 10 read the recording medium 105 on which the program is recorded, thereby realizing various processes described below. Various types of recording media can be used for the recording medium 105. For example, the recording medium 105 may be a recording medium that records information optically, electrically, or magnetically, such as a CD (Compact Disc)-ROM, a flexible disk, or a magneto-optical disk, or a semiconductor memory that records information electrically, such as a ROM or a flash memory. The recording medium 105 does not include a carrier wave.

[0039] In the example shown in Fig. 2, the functions of the acquisition unit 11, prediction unit 12, and management unit 13 shown in Fig. 1 can be realized by the control unit 101 executing one or more programs in a storage device (for example, the main storage unit 102 or the auxiliary storage unit 103). Also, the information storage unit 14 shown in Fig. 1 can be realized by any combination of at least one of the main storage unit 102, the auxiliary storage unit 103, and the recording medium 105 shown in Fig. 1 or two or more of them.

[0040] Next, the operation of the information processing device 10 will be described.

[0041] FIG. 3 is a flowchart showing the process in the information processing device.

[0042] In step S102, the acquisition unit 11 receives input of the crude oil types constituting the crude oil and their ratios, and stores them in the information storage unit 14.

[0043] In step S104, the prediction unit 12 inputs the crude oil type and its ratio (e.g., volume ratio) stored in the information storage unit 14 in step S102 into the above calculation formula stored in the information storage unit 14, and calculates the value of a parameter correlating with the stability of asphaltene in the crude oil or the value of a parameter corresponding to the chloride ion concentration contained in the condensed water at the top of the atmospheric distillation tower.

[0044] In step S106, the prediction unit 12 stores the calculation results of the parameter values ​​in the information storage unit 14. This makes the calculation results of the parameter values ​​stored in the information storage unit 14 available for use at any time.

[0045] In step S108, the management unit 13 generates and outputs support information regarding the injection of chemicals into crude oil based on the calculation results of the parameter values ​​calculated in step S104.

[0046] In step S110, the management unit 13 stores the support information generated in step S108 in the information storage unit 14. This makes it possible for the support information stored in the information storage unit 14 to be used at any time.

[0047] Next, the above calculation formula will be explained.

[0048] The calculation formula can be shown, for example, as formula (1), which is a general formula for a linear model.

[0049]

number

[0050] The calculation formula does not need to have terms for all crude oil types contained in the crude oil, and for example, a calculation formula can be used in which the terms are limited to only crude oil types that actually have a certain level of influence on asphaltene stability based on the properties of the crude oil types (e.g., their contribution to asphaltene stability) and their ratios. Also, for example, a calculation formula can be used in which the terms are limited to only crude oil types that are predicted to have a chloride ion concentration of a certain level or higher in the condensed water at the top of the atmospheric distillation tower. In these cases, in the above step S102, it is sufficient to accept input for only the necessary crude oil types.

[0051] The calculation formula can be updated based on the index value obtained as the analysis result for the new crude oil and the crude oil type of the new crude oil to be analyzed. In this case, it is possible to utilize the data stored in the information storage unit 14 in the above step S102.

[0052] The creation and updating of the calculation formula may be performed by a person other than the owner of the information processing device 10 (for example, the owner of the oil refining plant). In this case, the creator of the calculation formula creates and updates the calculation formula based on a plurality of index values ​​obtained as the analysis result and the crude oil type of each of the crude oils that are the subject of the analysis. In addition, for example, the latest calculation formula may be transferred from a server managed by the creator of the calculation formula to each information processing device 10. By creating and updating the calculation formula externally in this way, it becomes possible to appropriately create and update the calculation formula without increasing the workload of the owner of the information processing device 10.

[0053] Next, the support information generated and output by the management unit 13 will be described.

[0054] The parameter value calculated in step S104 indicates the severity of the fouling of the heat exchanger or the severity of the corrosion of the equipment, so that the management unit 13 can generate information useful for managing the fouling of the heat exchanger or the corrosion of the equipment as support information.

[0055] Examples of the support information include information on the injection of a chemical, for example, a fouling inhibitor for a heat exchanger or a chemical for removing fouling, or information on the injection of a chemical for preventing corrosion of equipment. In this case, the management unit 13 may generate, as the support information, information indicating, for example, the injection amount of the fouling inhibitor or corrosion inhibitor relative to the amount of crude oil (injection ratio to crude oil). Furthermore, when the amount of crude oil is known, the management unit 13 may generate, for example, information indicating the injection amount of the fouling inhibitor or corrosion inhibitor that should actually be injected. Furthermore, the management unit 13 may generate information indicating the timing of injection of the fouling inhibitor or corrosion inhibitor.

[0056] Furthermore, the management unit 13 may generate and output, as support information, information indicating the type of medicine to be injected.

[0057] As described above, in the information processing device of this embodiment, a calculation formula is created based on a plurality of index values ​​(parameter values) obtained as analysis results in the past and the crude oil type of each crude oil that is the subject of analysis. Since the index values ​​(parameter values) corresponding to new crude oil can be predicted using the calculation formula, it is possible to effectively respond to changes in the composition of crude oil types. In addition, when a new crude oil type is used as the raw material for an oil refining plant, the analysis results for the period of the raw material are accumulated, and the calculation formula is reviewed to predict the index values ​​thereafter. Even when no new crude oil type is used, the calculation formula for the index value may be reviewed each time a certain amount of analysis results are accumulated. In this way, according to this embodiment, it is possible to perform appropriate management according to the ratio of crude oil types with respect to fouling of heat exchangers and corrosion of equipment.

[0058] In addition, the information processing device of this embodiment generates and outputs support information related to the injection of chemicals into crude oil. Therefore, for example, in an oil refining plant, this support information can be effectively used as specific information related to the injection of chemicals.

[0059] Although each embodiment has been described above in detail, the present invention is not limited to the specific embodiment, and various modifications and changes are possible within the scope of the claims. In addition, it is also possible to combine all or a plurality of the components of the above-described embodiments. [Explanation of symbols]

[0060] 11 Acquisition Department 12 Prediction Department 13 Management Department 14 Information storage section

Claims

1. An acquisition step of acquiring crude oil types constituting the crude oil and their ratios; a prediction step of inputting the crude oil type and its ratio acquired in the acquisition step into a computer and predicting an index value showing a correlation with fouling or corrosion by calculation of a calculation formula executed by a program on the computer; A chemical injection amount management method comprising a management step of managing the injection amount of an antifouling agent or an anticorrosion agent based on the prediction result by the prediction step.

2. The chemical injection amount management method according to claim 1 , wherein the calculation formula is created based on measured values ​​of the index value obtained for a plurality of crude oils.

3. The chemical injection amount management method according to claim 2 , wherein the calculation formula is created based on a relationship between the measured value of the index value for each crude oil, the crude oil type and its ratio.

4. The chemical injection amount management method according to claim 1 , wherein the management step generates and outputs support information regarding the injection of chemicals into the crude oil related to the crude oil type based on the index value predicted by the prediction step.

5. The drug injection amount management method according to claim 4 , wherein the support information relates to the drug injection amount.

6. an acquisition unit that acquires the crude oil types constituting the crude oil and their ratios; a prediction unit that inputs the crude oil type and its ratio acquired by the acquisition unit into a computer and predicts an index value showing a correlation with fouling or corrosion by calculation of a calculation formula executed by a program on the computer; A chemical injection amount management device comprising: a management unit that manages the injection amount of an antifouling agent or anticorrosion agent based on the prediction result by the prediction unit.

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