Optimization method and system for transportation increasing and station crossing of product oil pipeline and storage medium

Abstract

The invention relates to the technical field of product oil transportation, in particular to a product oil pipeline transportation increasing and station crossing optimization method and system and a storage medium. The method comprises the following steps: acquiring an initial rotating speed of an input pump station and an initial rotating speed of at least one intermediate pump station; determining an input pump station target rotating speed and at least one intermediate pump station target rotating speed according to the drag reducer concentration and a preset corresponding relation; the corresponding relation is the corresponding relation between different drag reducer concentrations and different pump station rotating speeds; and optimizing the input pump station and the at least one intermediate pump station according to the target rotating speed of the input pump station and the target rotating speed of the at least one intermediate pump station. According to the method, the rotating speed of the pump station is reduced according to the concentration of the drag reducer, the conveying energy consumption and cost of the product oil can be reduced, the effect of the drag reducer is kept, and the phenomena of over-pump shearing and throttling shearing when the product oil passes through the middle pump station are prevented; the obtained optimization result is reasonable, and the method is particularly suitable for long-distance product oil conveying with complex environment changes.

Description

Technical Field

[0001] The present invention relates to the technical field of refined oil transportation, and in particular to an optimization method, system and storage medium for increasing and skipping stations in a refined oil pipeline. Background Art

[0002] In the transportation of finished oil products through pipelines, pump units are used to provide power for the transportation of finished oil products. On long-distance pipelines, there are multiple sub-transmission stations and intermediate pumping stations. Pump units are installed in sub-transmission stations and intermediate pumping stations to supplement the pressure of finished oil during transportation and ensure its smooth transportation to the final station. Since the finished oil obtains power through the pump unit at the first station of transportation, and the terrain environment changes greatly during long-distance transportation, the start and stop of the pump units at the sub-transmission stations along the line need to be controlled according to different situations.

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

[0004] Drag reducer is a kind of high molecular polymer, which is a substance that reduces the flow resistance of finished oil in the pipeline. When using drag reducer, the speed of the pump unit can be reduced to a certain extent in theory. However, adding too much drag reducer will reduce the quality of finished oil and make it impossible to use it normally. Moreover, when the drag reducer passes through the pump unit of the pump station and the throttle valve of the pressure reducing station, it will produce "over-pump shear" and "throttling shear", which directly leads to the failure of the drag reducer effect. This makes it difficult to reduce energy consumption and transportation costs when using drag reducer.

[0005] There is currently no scientific and reasonable optimization method for the operation of finished oil pipeline pump units. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide an optimization method, system and storage medium for increasing the transmission of finished oil pipelines and bypassing stations.

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

[0008] The present invention provides an optimization method for increasing the output of a finished oil pipeline and bypassing a station. The finished oil pipeline is provided with an input pump station and at least one intermediate pump station in sequence. The optimization method comprises the following steps:

[0009] respectively obtaining an initial rotation speed of an input pump station and an initial rotation speed of at least one intermediate pump station;

[0010] Determine the input pump station target speed and at least one intermediate pump station target speed according to the drag reducer concentration and a preset corresponding relationship; the corresponding relationship is the corresponding relationship between different drag reducer concentrations and different pump station speeds;

[0011] The input pumping station and the at least one intermediate pumping station are optimized according to the target speed of the input pumping station and the target speed of the at least one intermediate pumping station.

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

[0013] Furthermore, the optimization is to reduce the rotation speed of the input pumping station and / or at least one of the intermediate pumping stations.

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

[0015] Furthermore, the preset rotation speed is 1600-1800 r / min.

[0016] Furthermore, the drag reducer is added at the input pump station.

[0017] Furthermore, the concentration of the drag reducer is 3.8 to 10.8 ppm.

[0018] The present invention also provides an optimization system for increasing the transmission of finished oil pipelines and skipping stations, comprising:

[0019] An initial speed monitoring unit, used to obtain an initial speed of an input pump station and an initial speed of at least one intermediate pump station;

[0020] A target speed acquisition unit, which determines a target speed of an input pump station and a target speed of at least one intermediate pump station according to a drag reducer concentration and a preset corresponding relationship;

[0021] A control unit is used to optimize the input pumping station and at least one of the intermediate pumping stations according to the target speed of the input pumping station and the target speed of at least one of the intermediate pumping stations.

[0022] Furthermore, it also includes a drag reducer input unit, which is used to input the drag reducer at the input pump station.

[0023] The present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the above-mentioned optimization method when executing the computer program.

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

[0025] The beneficial effects of the present invention are:

[0026] (1) The optimization method for increasing the delivery of finished oil pipelines by passing stations of the present invention combines the drag reducer concentration with the speed of the intermediate pump station, and reduces the speed of the pump station according to the drag reducer concentration, thereby effectively reducing the energy consumption and cost in the process of delivering finished oil;

[0027] (2) The optimization method for increasing the throughput of a refined oil pipeline according to the present invention can specifically and objectively judge the speed and start / stop conditions of the pump by using the preset relationship between the drag reducer concentration and the pump speed, thereby making it possible to shut down the intermediate pump station and more reasonably optimizing the operation of the pump unit.

[0028] (3) The optimization method for increasing the transmission of finished oil pipelines through stations of the present invention can maximize the effect of the drag reducer within a reasonable drag reducer concentration range, and prevent the occurrence of "over-pump shear" and "throttling shear" when passing through intermediate pump stations;

[0029] (4) The optimization method for increasing the transmission of finished oil pipelines by skipping stations of the present invention has simple steps and does not require the use of too many additional equipment for optimization. The obtained optimization results are more reasonable and are particularly suitable for the transportation of finished oil pipelines over long distances and with complex environmental changes. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 The present invention is a flow chart of the optimization method for increasing the transmission of finished oil pipelines and bypassing stations. DETAILED DESCRIPTION

[0031] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0032] like Figure 1 As shown, the optimization method for increasing the output of a finished oil pipeline by skipping stations of the present invention, the finished oil pipeline is provided with an input pump station and at least one intermediate pump station in sequence, and the optimization method comprises the following steps:

[0033] S1, respectively obtaining an initial speed of an input pump station and an initial speed of at least one intermediate pump station;

[0034] S2, determining the input pump station target speed and at least one intermediate pump station target speed according to the drag reducer concentration and a preset corresponding relationship; the corresponding relationship is the corresponding relationship between different drag reducer concentrations and different pump station speeds;

[0035] S3. Optimize the input pumping station and at least one intermediate pumping station according to the target speed of the input pumping station and the target speed of at least one intermediate pumping station.

[0036] The optimization method for increasing the delivery of finished oil pipelines through stations of the present invention combines the drag reducer concentration with the rotation speed of the intermediate pump station, and relatively reduces the pump station rotation speed according to the drag reducer concentration, thereby effectively reducing the energy consumption and cost in the finished oil transportation process, while ensuring the smooth transportation of the finished oil and the oil quality.

[0037] In the optimization method of the present invention, the input pump station is located upstream of at least one intermediate pump station, and drag reducers can be injected at the input pump station, while only the pump is started and stopped at the intermediate pump station. The initial speed of the input pump station and the initial speed of the intermediate pump station refer to the speeds required to transport a known amount and type of finished oil when no drag reducer is added. Generally speaking, the inner diameter of the pipeline is determined, the delivery amount of the finished oil is also known, and the type of the finished oil can specifically be gasoline or diesel.

[0038] In the optimization method of the present invention, the concentration of the drag reducer is the concentration of the drag reducer in the finished oil; ppm means one part per million, 1ppm is 0.0001%; ​​according to the current ppm value, it can be confirmed how much drag reducer is added to a certain amount of finished oil.

[0039] When there are multiple pumps in a pump unit, the speeds of the pumps cannot be superimposed, but they can be superimposed through the pressure of the pump unit. If the pump units are connected in series, the pressures are added and the flow rate remains unchanged; if the pump units are connected in parallel, the flow rates are added and the pressure remains unchanged. In other words, when multiple pumps need to be turned on, the optimized speed obtained according to the optimization scheme of the present invention can be further converted into a pressure value, and each pump can be adjusted to a scheme that meets the pressure.

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

[0041] The preset corresponding relationship between the drag reducer concentration and the pump station rotation speed can be obtained through experiments or calculated through some parameters.

[0042] In the optimization method for increasing the delivery of finished oil pipelines through stations of the present invention, the optimization is specifically to reduce the rotation speed of the input pump station and / or at least one intermediate pump station; this can significantly reduce the transportation energy consumption and transportation cost of the finished oil.

[0043] Preferably, when the target speed of any intermediate pumping station is lower than the preset speed, the intermediate pumping station is closed; in this way, the optimization method of the present invention can realize the direct closing of the intermediate pumping station, and the refined oil can be transported across the station only by inputting the pressure of the pumping station. At the same time, in this case, the drag reducer will not produce "over-pump shear" and "throttling shear" when passing through the intermediate pumping station, so that the effect of the drag reducer can be continuously maintained, thereby limiting the amount of drag reducer used, further reducing the transportation cost of the refined oil.

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

[0045] Preferably, the concentration of the drag reducer is 3.8 to 10.8 ppm; when the concentration of the drag reducer is greater than 10.8 ppm, although the pump speed can be further reduced, the drag reducer concentration is too high, which will affect the quality of the finished oil and make the finished oil unable to be used normally.

[0046] The optimization system for increasing the transmission of finished oil pipelines and skipping stations of the present invention comprises:

[0047] An initial speed monitoring unit, used to obtain an initial speed of an input pump station and an initial speed of at least one intermediate pump station;

[0048] A target speed acquisition unit, which determines a target speed of an input pump station and a target speed of at least one intermediate pump station according to a drag reducer concentration and a preset corresponding relationship;

[0049] A control unit is used to optimize the input pumping station and at least one intermediate pumping station according to the target rotation speed of the input pumping station and the target rotation speed of at least one intermediate pumping station.

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

[0051] The above optimization system of the present invention also includes a drag reducer input unit for inputting the drag reducer at the input pump station; the drag reducer input unit can be independently provided or connected to the control unit circuit. The drag reducer input unit can realize automatic and real-time input of the drag reducer, making the optimization system more flexible.

[0052] The electronic device of the present invention comprises a memory, a processor and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the above-mentioned optimization method is implemented.

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

[0054] In some embodiments, the optimization system for increasing the output of a refined oil pipeline and bypassing a station provided by the present invention can be implemented in a combination of software and hardware. As an example, the optimization system for increasing the output of a refined oil pipeline and bypassing a station provided by the present invention can be a processor in the form of a hardware decoding processor, which is programmed to execute the gene mutation grading method provided by an embodiment of the present invention. For example, the processor in the form of a hardware decoding processor can adopt 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 optimization system for increasing the output of a refined oil pipeline and bypassing a station provided by the present invention can be implemented in a software manner. The optimization system for increasing the output of a refined oil pipeline and bypassing a station stored in a memory can be software in the form of programs and plug-ins, and includes a series of units for implementing the optimization method for increasing the output of a refined oil pipeline and bypassing a station provided by the present invention.

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

[0056] Example

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

[0058] Table 1 Basic information of Chengdu-Chongqing pipeline

[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 in use and one in reserve). Under normal circumstances, 1 variable frequency pump is started (it can be started across stations); Neijiang Station has 2 variable frequency pumps. Under normal circumstances, 1 variable frequency pump is started (it can be started across stations).

[0061] According to the above information, the Chengdu sub-transmission pumping station corresponds to the input pumping station in the present invention, and the Ziyang sub-transmission pumping station and Neijiang sub-transmission pumping station equipped with variable frequency pumps correspond to the intermediate pumping station in the present invention.

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

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

[0064] Table 2 Basic parameters of drag reducing agent used in oil product pipeline for increased transmission and overtaking

[0065]

[0066] This embodiment adopts the optimization method of the present invention, and obtains the corresponding relationship between the drag reducer injection concentration and the pump speed of the pump unit of the Chengdu sub-transmission station, and the pump speed of the pump unit of the Ziyang station and Neijiang station by adjusting the drag reducer injection concentration of the Chengdu sub-transmission station. The specific corresponding relationship is shown in Table 3.

[0067] Table 3 Corresponding relationship between drag reducer concentration and speed of each pump unit, energy consumption and cost

[0068]

[0069]

[0070] By adopting the schemes in Table 3, the inlet pressure of the finished oil can reach the requirement of 1.6MPa when it is transported to the terminal in Chongqing, indicating that smooth and stable transportation of finished oil can be achieved. At the same time, it can be seen from Table 3 that within the optional range, the higher the drag reducer concentration, the better the economy. At 8.4ppm, the intermediate station Ziyang pump station can be stopped and the cross-station process flow can be changed to reduce the shearing of the drag reducer, and the transportation energy consumption and cost can be significantly reduced.

[0071] When the drag reducer addition concentration is 8.4ppm, two cases, full-stop and pressure-stop, are investigated in Table 3. For full-stop, the finished oil enters and exits the station through the full-stop pipeline in Ziyang Station and goes to the next station; for pressure-stop, after the finished oil arrives at Ziyang Station, it first enters the filter in the station, then enters the pump unit area (the pump is not started), and finally passes through the adjustment area to reach the outlet pipeline and enter the next station.

[0072] In addition, in theory, both Ziyang Station and Neijiang Station can be skipped, but if both intermediate stations are skipped, the exit pressure of the first station may be higher, the exit pressure margin may be smaller, and there is a risk of overpressure in the exit area. Therefore, based on the actual working conditions, this embodiment only skips Ziyang Station.

[0073] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0074] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0075] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0076] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0077] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to 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 principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for optimizing the increase of pipeline transportation of refined oil products, characterized in that: The finished oil pipeline is provided with an input pump station and at least one intermediate pump station in sequence. The steps include: respectively obtaining an initial rotation speed of an input pump station and an initial rotation speed of at least one intermediate pump station; Determine the input pump station target speed and at least one intermediate pump station target speed according to the drag reducer concentration and a preset corresponding relationship; the corresponding relationship is the corresponding relationship between different drag reducer concentrations and different pump station speeds; The input pumping station and the at least one intermediate pumping station are optimized according to the target speed of the input pumping station and the target speed of the at least one intermediate pumping station.

2. The optimization method for increasing the number of stations in a refined oil pipeline according to claim 1 is characterized in that: The optimization consists in reducing the rotational speed of the input pumping station and / or at least one of the intermediate pumping stations.

3. The optimization method for increasing the number of stations in a refined oil pipeline according to claim 2 is characterized in that: When the target speed of any one of the intermediate pumping stations is lower than the preset speed, the intermediate pumping station is shut down.

4. The optimization method for increasing the number of stations in a product oil pipeline according to claim 3 is characterized in that: The preset rotation speed is 1600-1800 r / min.

5. The optimization method for increasing the number of stations in a product oil pipeline according to any one of claims 1 to 4, characterized in that: The drag reducer is added at the input pump station.

6. The optimization method for increasing the number of stations in a product oil pipeline according to claim 5 is characterized in that: The concentration of the drag reducer is 3.8 to 10.8 ppm.

7. An optimization system for increasing the number of stations in a refined oil pipeline, characterized in that: include: An initial speed monitoring unit, used to obtain an initial speed of an input pump station and an initial speed of at least one intermediate pump station; A target speed acquisition unit, which determines a target speed of an input pump station and a target speed of at least one intermediate pump station according to a drag reducer concentration and a preset corresponding relationship; A control unit is used to optimize the input pumping station and at least one of the intermediate pumping stations according to the target speed of the input pumping station and the target speed of at least one of the intermediate pumping stations.

8. The optimization system for increasing the flow of refined oil products through the pipeline according to claim 7 is characterized in that: It also includes a drag reducer input unit, which is used to input the drag reducer at the input pump station.

9. An electronic device, characterized in that: The invention comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the optimization method according to any one of claims 1 to 6 when executing the computer program.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program programmed or configured to execute the optimization method according to any one of claims 1 to 6.

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