Method and system for optimizing over-station of product oil pipeline and storage medium

Abstract

This invention relates to the field of refined oil transportation technology, specifically to an optimization method, system, and storage medium for refined oil pipeline bypassing. The method obtains the initial rotational speed of the input pump station and the initial rotational speed of at least one intermediate pump station; determines the target rotational speed of the input pump station and the target rotational speed of at least one intermediate pump station based on the drag-reducing agent concentration and a preset correspondence; the correspondence is between different drag-reducing agent concentrations and different pump station rotational speeds; and optimizes the input pump station and the at least one intermediate pump station based on the target rotational speed of the input pump station and the target rotational speed of the at least one intermediate pump station. This method reduces the pump station rotational speed based on the drag-reducing agent concentration, thereby reducing energy consumption and cost in refined oil transportation, maintaining the effect of the drag-reducing agent, and preventing "over-pump shearing" and "throttling shearing" phenomena when passing through intermediate pump stations. The obtained optimization results are reasonable and particularly suitable for long-distance refined oil transportation in environments with complex changes.

Description

Technical Field

[0001] This invention relates to the field of refined oil transportation technology, and more specifically, to an optimized method, system, and storage medium for refined oil pipeline bypassing stations. Background Technology

[0002] In refined oil pipeline transportation, pump units provide power for the transport of refined oil. Along long-distance pipelines, multiple distribution stations and intermediate pumping stations are set up. These stations are equipped with pump units to supplement the pressure of the refined oil during transport, ensuring its smooth delivery to the final station. Because the refined oil obtains power from the pump units at the first station of transportation, and because the terrain changes significantly over long distances, the start-up and shutdown of the pump units at the distribution stations along the route need to be controlled according to different circumstances.

[0003] The energy consumption and costs of pump unit operation are one of the main cost components of refined oil pipeline transportation. Therefore, in order to pursue energy conservation and reduce transportation costs, it is theoretically necessary to minimize them. However, when the operating speed of the pump unit is reduced or some pump units along the pipeline are shut down, transportation problems often occur.

[0004] Drag reducers are high-molecular polymers used to reduce the flow resistance of refined oil in pipelines. Theoretically, using drag reducers can reduce the speed of pump units to a certain extent. However, adding too much drag reducer can lead to a decrease in the quality of the refined oil, rendering it unusable. Moreover, when drag reducers pass through the pump units in pumping stations and the throttling valves in pressure reducing stations, "over-pump shearing" and "throttling shearing" phenomena occur, directly causing the drag reducer to lose its effectiveness. This results in the inability to reduce energy consumption and transportation costs even when using drag reducers.

[0005] Currently, there is no scientific and reasonable optimization method for the operation of refined oil pipeline transfer pump units. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide an optimized method, system and storage medium for pipeline bypassing of refined oil.

[0007] The technical solution of the present invention to solve the above-mentioned technical problems is as follows:

[0008] This invention provides an optimization method for bypassing stations in refined oil pipelines, wherein the refined oil pipeline is provided with an input pumping station and at least one intermediate pumping station in sequence, and the optimization method includes the following steps:

[0009] The initial speed of the input pump station and the initial speed of at least one intermediate pump station are obtained respectively.

[0010] The target speed of the input pump station and the target speed of at least one intermediate pump station are determined based on the drag-reducing agent concentration and a preset correspondence; the correspondence is the relationship between different drag-reducing agent concentrations and different pump station speeds.

[0011] The input pump station and at least one of the intermediate pump stations are optimized based on the target speed of the input pump station and the target speed of at least one of the intermediate pump stations.

[0012] Based on the above technical solution, the present invention can be further improved as follows.

[0013] Furthermore, the optimization involves reducing the rotational speed of the input pump station and / or at least one of the intermediate pump stations.

[0014] Furthermore, when the target speed of any of the intermediate pump stations is lower than the preset speed, the intermediate pump station is shut down.

[0015] Furthermore, the preset rotational speed is 1600–1800 r / min.

[0016] Furthermore, drag-reducing agent is added at the input pump station.

[0017] Furthermore, the concentration of the drag-reducing agent is 3.8–10.8 ppm.

[0018] This invention also provides an optimization system for increasing the number of stations in a refined oil pipeline, comprising:

[0019] An initial speed monitoring unit is used to acquire the initial speed of the input pump station and the initial speed of at least one intermediate pump station.

[0020] The target speed acquisition unit determines the target speed of the input pump station and the target speed of at least one intermediate pump station based on the drag-reducing agent concentration and a preset correspondence.

[0021] A control unit is configured to optimize the input pump station and at least one of the intermediate pump stations based on the target speed of the input pump station and the target speed of at least one of the intermediate pump stations.

[0022] Furthermore, it also includes a drag-reducing agent input unit for inputting drag-reducing agent into the input pump station.

[0023] The present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the above-described optimization method.

[0024] The present invention also provides a computer-readable storage medium on which a computer program is stored that is programmed or configured to perform the optimization method described above.

[0025] The beneficial effects of this invention are as follows:

[0026] (1) The optimization method for increasing the number of intermediate pump stations in the pipeline of the present invention combines the drag-reducing agent concentration and the intermediate pump station speed. By reducing the pump station speed relative to the drag-reducing agent concentration, the energy consumption and cost in the pipeline transportation process of refined oil can be effectively reduced.

[0027] (2) The optimization method for increasing the number of intermediate pump stations in the pipeline of the present invention can make a specific and objective judgment on the pump speed and start-up and shutdown status by means of the preset relationship between the drag-reducing agent concentration and the pump speed, making it possible to shut down the intermediate pump station and optimize the operation of the pump unit more reasonably.

[0028] (3) The optimized method for increasing the transportation of finished oil pipelines by bypassing stations in this invention can maximize the effect of the drag-reducing agent within a reasonable range of drag-reducing agent concentration, and prevent the phenomena of "over-pump shearing" and "throttling shearing" when passing through intermediate pumping stations.

[0029] (4) The optimization method for increasing the number of stations in the pipeline transportation of refined oil in this invention is simple in steps, does not require the use of too many additional equipment for optimization, and the optimization results are more reasonable. It is particularly suitable for long-distance pipeline transportation of refined oil in complex environments. Attached Figure Description

[0030] Figure 1 This is a flowchart of the optimized method for increasing the number of stations in the refined oil pipeline transportation according to the present invention. Detailed Implementation

[0031] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0032] like Figure 1 As shown, the optimization method for bypassing stations in a refined oil pipeline according to the present invention includes the following steps: An input pumping station and at least one intermediate pumping station are sequentially installed on the refined oil pipeline.

[0033] S1. Obtain the initial speed of the input pump station and the initial speed of at least one intermediate pump station respectively;

[0034] S2. Determine the target speed of the input pump station and the target speed of at least one intermediate pump station based on the drag-reducing agent concentration and the preset correspondence; the correspondence is the relationship between different drag-reducing agent concentrations and different pump station speeds;

[0035] S3. Optimize the input pump station and at least one intermediate pump station based on the target speed of the input pump station and the target speed of at least one intermediate pump station.

[0036] The optimized method for bypassing intermediate pump stations in refined oil pipelines of the present invention combines the drag-reducing agent concentration and the intermediate pump station speed. By relatively reducing the pump station speed according to the drag-reducing agent concentration, the energy consumption and cost in the refined oil transportation process can be effectively reduced, while ensuring the smooth transportation and quality of refined oil.

[0037] In the optimized method of this invention, the input pump station is located upstream of at least one intermediate pump station. A drag-reducing agent can be injected at the input pump station, while only pump start-up and shutdown are performed at the intermediate pump stations. The initial speed of the input pump station and the initial speed of the intermediate pump station refer to the speed required to transport a known quantity and type of finished oil without the addition of drag-reducing agent. Generally, the inner diameter of the pipeline is fixed, the transport volume of the finished oil is known, and the type of finished oil can specifically be gasoline or diesel.

[0038] In the optimization method of the present invention, the concentration of the drag-reducing agent is the concentration of the drag-reducing agent in the finished oil; ppm means parts per million, and 1 ppm is 0.0001%; ​​based on the current ppm value, it can be determined how much drag-reducing agent has been added to a certain amount of finished oil.

[0039] When a pump unit has multiple pumps, the speeds of the pumps cannot be summed, but they can be summed by the pressure of the pump unit. If the pump units are connected in series, the pressures are added together while the flow rate remains unchanged; if the pump units are connected in parallel, the flow rates are added together while the pressure remains unchanged. That is to say, when multiple pumps need to be started, the optimized speed obtained according to the optimization scheme of this invention can be further converted into a pressure value, and each pump can be adjusted to meet that pressure.

[0040] Preferably, the input pumping station can be the first station of the pipeline or a distribution pumping station along the pipeline.

[0041] The pre-defined relationship between drag-reducing agent concentration and pump station speed can be obtained through experiments or by calculation using some parameters.

[0042] In the optimization method for increasing the number of stations in the pipeline transportation of refined oil in this invention, the optimization specifically involves reducing the rotational speed of the input pump station and / or at least one intermediate pump station; this can significantly reduce the energy consumption and transportation cost of refined oil transportation.

[0043] Preferably, when the target speed of any intermediate pump station is lower than the preset speed, the intermediate pump station is shut down. In this way, the optimized method of the present invention can realize the direct shutdown of intermediate pump stations, and the refined oil can be transported by simply inputting the pressure of the pump station. At the same time, in this case, the drag-reducing agent will not produce the phenomena of "over-pump shear" and "throttling shear" when passing through the intermediate pump station, so that the effect of the drag-reducing agent can be maintained continuously, thereby limiting the amount of drag-reducing agent used and further reducing the transportation cost of refined oil.

[0044] Preferably, in some embodiments, the preset rotational speed of the intermediate pump station is 1600-1800 r / min.

[0045] Preferably, the concentration of the drag-reducing agent is 3.8 to 10.8 ppm. When the concentration of the drag-reducing agent is greater than 10.8 ppm, although the pump speed can still be further reduced, the excessive concentration of the drag-reducing agent will affect the quality of the finished oil and make the finished oil unusable.

[0046] The optimized system for bypassing stations in refined oil pipeline transportation according to the present invention includes:

[0047] An initial speed monitoring unit is used to acquire the initial speed of the input pump station and the initial speed of at least one intermediate pump station.

[0048] The target speed acquisition unit determines the target speed of the input pump station and the target speed of at least one intermediate pump station based on the drag-reducing agent concentration and a preset correspondence.

[0049] The control unit is used to optimize the input pump station and at least one intermediate pump station based on the target speed of the input pump station and the target speed of at least one intermediate pump station.

[0050] Preferably, the control unit can also be used to control the input of drag-reducing agent.

[0051] The optimization system of the present invention further includes a drag-reducing agent input unit for inputting drag-reducing agent into the input pump station. The drag-reducing agent input unit can be set up independently or connected to the control unit circuit. The drag-reducing agent input unit enables automatic, real-time input of drag-reducing agent, making the optimization system more flexible.

[0052] The electronic device of the present invention includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the above-described optimization method.

[0053] The computer-readable storage medium of the present invention stores a computer program that is programmed or configured to perform the optimization method described above.

[0054] In some embodiments, the optimized system for bypassing intermediate stations in refined oil pipelines provided by the present invention can be implemented using a combination of hardware and software. For example, the optimized system can be a processor in the form of a hardware decoding processor, programmed to execute the gene mutation grading method provided in the embodiments of the present invention. For instance, the hardware decoding processor can employ one or more application-specific integrated circuits (ASICs), DSPs, programmable logic devices (PLDs), complex programmable logic devices (CPLDs), field-programmable gate arrays (FPGAs), or other electronic components. In other embodiments, the optimized system for bypassing intermediate stations in refined oil pipelines provided by the present invention can be implemented in software. The optimized system, stored in memory, can be software in the form of programs and plug-ins, and includes a series of units for implementing the optimized method for bypassing intermediate stations in refined oil pipelines provided by the present invention.

[0055] The technical solution of the present invention will be illustrated by specific embodiments below.

[0056] Example

[0057] This embodiment takes the Lanzhou-Chengdu-Chongqing refined oil pipeline as an example to specifically examine the operation optimization of each pump unit in the Chengdu-Chongqing section. The basic situation of this pipeline is shown in Table 1.

[0058] Table 1. Basic Information on the Chengdu-Chongqing Pipeline Section

[0059]

[0060] Chengdu Station has 1 fixed-speed pump and 2 variable-frequency pumps. Under normal circumstances, 1 fixed-speed pump and 1 variable-frequency pump are started. Ziyang Station has 2 variable-frequency pumps (one for use and one for standby). Under normal circumstances, 1 variable-frequency pump is started (can bypass stations). Neijiang Station has 2 variable-frequency pumps. Under normal circumstances, 1 variable-frequency pump is started (can bypass stations).

[0061] Based on the above information, the Chengdu distribution pumping station corresponds to the input pumping station in this invention, and the Ziyang distribution pumping station and Neijiang distribution pumping station, which are equipped with variable frequency pumps, correspond to the intermediate pumping stations in this invention.

[0062] In addition, the finished oil specifically transported in this embodiment is diesel, with an inlet pressure of 1.4 MPa and an outlet flow rate of 485 m³ / h in Chengdu. 3 / h, Chongqing inlet pressure 1.6MPa, and the distribution flow rate of each station is the same.

[0063] The drag-reducing agent used in this embodiment is an ultra-high molecular weight oil-soluble polymer with a viscoelastic long-chain molecular structure. Its main component is polyα-olefin. A small amount of addition can reduce the resistance encountered by the fluid during transportation. The drag-reducing agent is coded as KS-30, and its basic parameters are shown in Table 2.

[0064] Table 2 Basic parameters of drag-reducing agents used for pipeline bypassing of refined oil stations.

[0065]

[0066] This embodiment uses the optimization method of the present invention. By adjusting the injection concentration of drag-reducing agent at the Chengdu distribution station, the corresponding relationship between the injection concentration of drag-reducing agent and the pump speed of the pump unit at the Chengdu distribution station, the pump speed of the pump unit at the Ziyang station and the Neijiang station is obtained. The specific relationship is shown in Table 3.

[0067] Table 3. Correspondence between drag-reducing agent concentration and pump unit speed, energy consumption, and cost.

[0068]

[0069]

[0070] Using the schemes in Table 3, the inlet pressure of the refined oil at the Chongqing terminal station can all reach the requirement of 1.6 MPa, indicating that smooth and stable refined oil transportation can be achieved. Furthermore, Table 3 shows that, within the selectable range, higher drag-reducing agent concentrations result in better economic efficiency. At 8.4 ppm, the intermediate station, Ziyang Pumping Station, can be shut down, and the bypass process can be changed to reduce the shearing of the drag-reducing agent, significantly lowering transportation energy consumption and costs.

[0071] When the drag-reducing agent concentration was 8.4 ppm, Table 3 examined two scenarios: full bypass and pressure bypass. For full bypass, the refined oil entered and exited the Ziyang station through the full bypass pipeline within the station, and proceeded to the next station. For pressure bypass, after arriving at the Ziyang station, the refined oil first entered the station's filter, then entered the pump unit area (without starting the pump), and finally passed through the regulating area before reaching the outlet pipeline and proceeding to the next station.

[0072] In addition, theoretically, Ziyang Station and Neijiang Station can both bypass stations. However, if both intermediate stations bypass stations, it may result in higher outgoing pressure at the first station and a smaller outgoing pressure margin, posing a risk of overpressure in the outgoing area. Therefore, considering the actual working conditions, this embodiment only allows Ziyang Station to bypass stations.

[0073] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0074] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0075] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0076] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0077] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0078] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An optimized method for increasing the number of stations in a refined oil pipeline, characterized in that, The refined oil pipeline is equipped with an input pump station and at least one intermediate pump station in sequence. The optimization method... Includes the following steps; The initial speed of the input pump station and the initial speed of at least one intermediate pump station are obtained respectively. The target speed of the input pump station and the target speed of at least one intermediate pump station are determined based on the drag-reducing agent concentration and a preset correspondence; the correspondence is the relationship between different drag-reducing agent concentrations and different pump station speeds. The input pumping station and at least one intermediate pumping station are optimized based on the target speed of the input pumping station and the target speed of at least one intermediate pumping station. The optimization involves reducing the rotational speed of the input pump station and / or at least one of the intermediate pump stations; When the target speed of any of the intermediate pump stations is lower than the preset speed, the intermediate pump station will be shut down.

2. The optimized method for increasing the number of stations in a refined oil pipeline according to claim 1, characterized in that, The preset rotational speed is 1600~1800 r / min.

3. The optimized method for bypassing stations in a refined oil pipeline according to claim 1 or 2, characterized in that, The drag-reducing agent is added at the input pump station.

4. The optimized method for bypassing stations in refined oil pipeline transportation according to claim 3, characterized in that, The concentration of the drag-reducing agent is 3.8~10.8 ppm.

5. An optimized system for bypassing stations in refined oil pipeline transportation, characterized in that, An optimization method for implementing the refined oil pipeline bypassing method according to any one of claims 1-4, wherein the optimization system comprises: An initial speed monitoring unit is used to acquire the initial speed of the input pump station and the initial speed of at least one intermediate pump station. The target speed acquisition unit determines the target speed of the input pump station and the target speed of at least one intermediate pump station based on the drag-reducing agent concentration and a preset correspondence. A control unit is configured to optimize the input pump station and at least one of the intermediate pump stations based on the target speed of the input pump station and the target speed of at least one of the intermediate pump stations.

6. The optimized system for bypassing stations in refined oil pipeline transportation according to claim 5, characterized in that, It also includes a drag-reducing agent input unit for inputting drag-reducing agent into the input pump station.

7. An electronic device, characterized in that, It includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the optimization method according to any one of claims 1 to 4.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that is programmed or configured to perform the optimization method as described in any one of claims 1 to 4.

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