A terminal oil unloading filter device

Abstract

The utility model provides a kind of wharf oil unloading filtering device, including oil unloading pipeline, filter main road, filtering mechanism, filter branch and differential pressure gauge;The oil inlet end of filter main road is communicated with the oil outlet end of oil unloading pipeline, and the oil outlet end of filter main road is communicated to oil outlet conveying area;Filtering mechanism is detachably installed on filter main road, and main road electric valve for controlling the on-off of filter main road is arranged in series on filter main road;Filter branch is arranged in parallel with filter main road;Branch electric valve for controlling the on-off of filter branch is arranged in series on filter branch;Differential pressure gauge is used for real-time monitoring the pressure difference of filtering mechanism oil inlet and outlet end.The utility model's advantage the device is laid out in parallel by "filter main road+filter branch", and differential pressure gauge is used for real-time monitoring the pressure difference of filtering mechanism oil inlet and outlet end, realizes the accurate control to filter state, guarantees filtering function at the same time, provides foundation for non-stop maintenance, ensures the continuity and efficiency of oil unloading operation.

Description

Technical Field

[0001] This utility model relates to the field of oil unloading technology at docks, and more specifically, to an oil unloading filtration device at a dock. Background Technology

[0002] In the petrochemical and warehousing logistics sectors, terminal unloading is a crucial step in transferring oil products from transport carriers to storage tanks. The rationality of its process and the effectiveness of purification directly impact the stability of the entire subsequent oil depot operation chain. In actual operations, oil products easily carry various solid impurities during long-distance transportation, pipeline transport, and loading / unloading. Besides rust commonly found in terminal transport, these include oxide scale detached from pipeline walls, metal fragments from wear and tear on transport equipment, and dust particles mixed in from the outside. These impurities vary in particle size, and some fine particles can remain suspended in the oil, accumulating and depositing at the bottom of the tanks over time to form sludge.

[0003] The presence of such impurities not only severely affects oil quality, leading to decreased purity and deviations from standards in various indicators, thus impacting subsequent processing and use, but also significantly increases the amount of sludge required for tank cleaning. This shortens the cleaning cycle and necessitates greater investment of manpower, resources, and time during cleaning operations. Furthermore, sludge treatment during the cleaning process faces environmental compliance challenges. Simultaneously, deposited impurities exacerbate corrosion and wear on the inner walls of oil tanks, reducing the structural safety and service life of storage equipment. If these impurities enter subsequent oil dispensing pipelines, pumps, and other equipment, they can cause valve blockages, component wear, equipment malfunctions, and downtime, severely impacting oil depot dispensing efficiency and even potentially leading to safety accidents.

[0004] like Figure 3 As shown, the current oil unloading process only focuses on the continuity of oil transportation. With the continuous improvement of oil quality requirements and increasingly stringent environmental regulations, the existing oil unloading process can no longer meet the urgent needs of modern oil depots for oil purification and equipment protection. Utility Model Content

[0005] The present invention addresses the technical problem that the existing oil unloading process lacks efficient filtration, leading to impurities entering the tank and affecting the safety of oil and equipment. To overcome the shortcomings of the prior art, the present invention provides a method that helps reduce the workload of subsequent tank cleaning and maintenance, lowers operating costs, improves oil quality, and ensures the long-term stable operation of oil dispensing equipment, thereby comprehensively improving the safety, economy, and environmental protection of the oil depot system.

[0006] To achieve the purpose of this utility model, the following technical solution is adopted: A dockside oil unloading filtration device includes an oil unloading pipeline, a main filtration pipeline, a filtration mechanism, filtration branch pipelines, and a differential pressure gauge. The inlet end of the main filtration pipeline is connected to the outlet end of the oil unloading pipeline, and the outlet end of the main filtration pipeline is connected to an oil delivery area. The filtration mechanism is detachably installed on the main filtration pipeline, and a main pipeline electric valve for controlling the on / off state of the main filtration pipeline is connected in series on the feed end side of the filter mechanism. The feed end of each filtration branch pipeline is connected to the outlet end of the oil unloading pipeline, and the outlet end of the filtration branch pipeline is connected to the oil delivery area. The main filtration pipeline and the filtration branch pipelines are arranged in parallel. A branch pipeline electric valve for controlling the on / off state of the filtration branch pipeline is connected in series on each filtration branch pipeline. One end of the differential pressure gauge is connected to the main filtration pipeline on the feed end side of the filter mechanism via a pressure tapping pipeline, and the other end of the differential pressure gauge is connected to the main filtration pipeline on the outlet end side of the filter mechanism via a pressure tapping pipeline. The differential pressure gauge is used to monitor the pressure difference between the feed and outlet ends of the filter mechanism in real time. This device employs a parallel layout of "main filtration line + branch filtration lines," coupled with a differential pressure gauge to monitor the pressure difference between the inlet and outlet of the filtration mechanism in real time. This enables precise control of the filtration status, ensuring filtration functionality while providing a basis for non-stop maintenance. It guarantees the continuity and efficiency of oil unloading operations, solving the technical problem of traditional oil unloading systems lacking efficient filtration, leading to impurities entering the tank and affecting the safety of oil and equipment. The filtration mechanism is detachable and easy to install, facilitating subsequent maintenance, cleaning, or replacement, reducing the difficulty of equipment operation and maintenance, and ensuring the long-term stable operation of the filtration device. The overall structure is simple and rationally laid out, allowing direct integration into existing terminal oil unloading systems. It is highly adaptable, requiring no large-scale modification of existing oil unloading pipelines, thus reducing the cost of technology implementation.

[0007] Preferably, the system also includes a control unit, which is electrically connected to the main electric valve, the branch electric valve, and the differential pressure gauge. When the impurities trapped in the filtration mechanism accumulate to a set amount, causing the differential pressure detected by the differential pressure gauge to reach a preset threshold, the control unit automatically sends a shut-off signal to the main electric valve, cutting off the main filtration path. Simultaneously, the control unit automatically sends an open signal to the branch electric valve, opening the branch filtration path, thus achieving seamless switching of the unloading path. This automated, seamless switching of the unloading path via the control unit eliminates the need for manual intervention, solving problems such as unloading interruptions and low efficiency caused by manual path switching in traditional devices, ensuring the continuity of unloading operations. When the accumulated impurities in the filtration mechanism reach a preset threshold, the control unit automatically cuts off the main filtration path and opens the branch filtration path, preventing abnormal pipeline pressure and oil delivery obstruction caused by filtration mechanism blockage, thus reducing the risk of equipment failure.

[0008] Preferably, the filtration mechanism is a basket filter with a filtration accuracy of 5-100 μm, and the filter element is made of metal or polymer filter material, used to trap solid impurities in the oil unloading medium. The inclusion of a basket filter and its specified accuracy and material provides an efficient and reliable means of impurity trapping; the 5-100 μm filtration accuracy range effectively removes solid particles of different sizes; and the metal or polymer filter element ensures the filter's durability and adaptability in oil media.

[0009] Preferably, the bottom of the basket filter has an integrally formed residual liquid discharge port, which is connected to a residual liquid passage. A filter tail pump is installed on the residual liquid passage, and this pump is used to forcibly discharge the residual liquid containing impurities deposited inside the basket filter to a designated collection area. The residual liquid passage allows for the rapid discharge of residual liquid containing impurities deposited inside the filter, preventing secondary contamination of oil and filter corrosion caused by residual liquid retention, thus ensuring the purification effect and service life of the filtration mechanism. The filter tail pump achieves forced discharge of residual liquid, which is more efficient and thorough than natural drainage, especially suitable for treating residual liquid from high-viscosity oils, ensuring that the residual liquid can be accurately delivered to the designated collection area, meeting environmental compliance requirements.

[0010] Preferably, the filter tailing pump is a self-priming centrifugal pump. Self-priming centrifugal pumps possess strong self-priming capabilities and convenient start-up, eliminating the need for additional priming liquid to extract residual liquid, thus simplifying the operation process. They also offer high operational stability and strong resistance to impurity interference, making them suitable for conveying residual liquids containing impurities. This reduces pump blockages and wear caused by impurities in the residual liquid, extending pump lifespan and lowering equipment maintenance costs. Furthermore, the pump's mature structure and low energy consumption allow for effective residual liquid discharge while controlling the overall operating cost of the device, thereby improving the economic efficiency of oil depot operations.

[0011] Preferably, a first ball valve is connected in series between the residual liquid discharge port of the basket filter and the inlet of the filter tail pump in the residual liquid passage. The first ball valve is used to control the opening and closing of the residual liquid passage. A simple opening and closing component achieves reliable shut-off of the residual liquid passage, facilitating the isolation and maintenance of the filter tail pump, and preventing leakage of internal media when not discharging liquid.

[0012] Preferably, a shut-off valve is connected in series on the inlet side of the filter scavenging pump in the residual liquid passage. The shut-off valve is used to isolate the passage during filter scavenging pump maintenance. The shut-off valve provides a better sealing isolation method, specifically for passage isolation during pump maintenance, further ensuring the safety of maintenance operations.

[0013] Preferably, a check valve is connected in series on the outlet side of the filter tail pump in the residual liquid passage. The flow direction of the check valve is consistent with the discharge direction of the residual liquid, which is used to prevent the discharged residual liquid from flowing back into the filter tail pump or basket filter. The check valve can effectively prevent the discharged residual liquid from flowing back, avoid cross-contamination and pump impeller reversal, and ensure that the residual liquid is discharged directionally and smoothly to the collection area.

[0014] Preferably, a second ball valve is connected in series on each of the pressure tapping lines at both ends of the differential pressure gauge. The second ball valve is used to cut off the pressure tapping path when the differential pressure gauge is under maintenance or replaced. The second ball valve allows the differential pressure gauge to be isolated, disassembled, calibrated, or replaced online without affecting the operation of the main pipeline, which facilitates the maintenance and repair of the instrument and ensures the long-term accuracy of the monitoring system.

[0015] The advantages of this invention are that the device, through a parallel layout of "main filtration path + branch filtration path," combined with differential pressure monitoring and an automatic control system, achieves automatic switching of the unloading path without shutdown when the filter is clogged, fundamentally ensuring the continuity and efficiency of oil unloading operations at the terminal. Simultaneously, the basket filter used possesses a fine filtration accuracy of 5-100μm, effectively intercepting various solid impurities such as rust and metal fragments at the source, significantly improving oil cleanliness and directly reducing the risk of sludge deposition in subsequent storage tanks and equipment wear. The unique residual liquid path and sweeping pump design can completely drain the impurities and residual liquid from the filter before maintenance, achieving "dry" cleaning, greatly reducing oil leakage and environmental pollution, making maintenance operations safer and more environmentally friendly. Furthermore, various valves installed on key pipelines facilitate the isolation and maintenance of pumps, instruments, and other components, ensuring the long-term stable operation and ease of maintenance of the system, comprehensively improving the safety, economy, and environmental compliance of oil depot operations. Attached Figure Description

[0016] Figure 1 is a schematic diagram of the pipeline of the wharf unloading oil filtration device of this utility model. Figure 2 is an enlarged schematic diagram of the wharf unloading oil filtration device of this utility model. Figure 3 is a schematic diagram of the pipeline of a conventional wharf unloading oil device of this utility model. Explanation of reference numerals: 1. Unloading pipeline; 2. Main filter line; 21. Main line electric valve; 3. Filtering mechanism; 4. Filtering branch line; 41. Branch line electric valve; 5. Differential pressure gauge; 51. Second ball valve; 6. Oil delivery area; 7. Residual liquid passage; 71. First ball valve; 8. Filter tail pump; 81. Shut-off valve; 82. Check valve. Detailed Implementation

[0017] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0018] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0019] In the embodiments of this application, unless otherwise expressly 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," "on top of," and "over" 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.

[0020] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] like Figures 1 to 2As shown, a dock unloading oil filtration device includes an unloading pipeline 1, a main filtration pipeline 2, a filtration mechanism 3, a filtration branch pipeline 4, and a differential pressure gauge 5; the oil inlet end of the main filtration pipeline 2 is connected to the oil outlet end of the unloading pipeline 1, and the oil outlet end of the main filtration pipeline 2 is connected to the oil delivery area 6. In this embodiment, the oil delivery area 6 is a marine fluid loading and unloading area. The filter mechanism 3 is detachably installed on the filter main line 2, and a main line electric valve 21 for controlling the on / off state of the filter main line 2 is connected in series on the feed end side of the filter mechanism 3 on the filter main line 2; the feed end of the filter branch line 4 is connected to the oil outlet end of the oil discharge line 1, and the oil outlet end of the filter branch line 4 is connected to the oil delivery area 6, and the filter main line 2 and the filter branch line 4 are arranged in parallel; a branch line electric valve 41 for controlling the on / off state of the filter branch line 4 is connected in series on the filter branch line 4; one end of the differential pressure gauge 5 is connected to the filter main line 2 on the oil inlet side of the filter mechanism 3 through a pressure tapping line, and the other end of the differential pressure gauge 5 is connected to the filter main line 2 on the oil outlet side of the filter mechanism 3 through a pressure tapping line, and the differential pressure gauge 5 is used to monitor the pressure difference between the oil inlet and outlet ends of the filter mechanism 3 in real time. This device employs a parallel layout of "main filtration path 2 + branch filtration path 4," coupled with a differential pressure gauge 5 to monitor the pressure difference between the inlet and outlet of the filtration mechanism 3 in real time. This allows for precise control of the filtration status, ensuring filtration functionality while providing a basis for non-stop maintenance. It guarantees the continuity and efficiency of unloading operations, solving the technical problem of traditional unloading systems lacking efficient filtration, leading to impurities entering the tank and affecting oil and equipment safety. Furthermore, the filtration mechanism 3 is detachable, facilitating subsequent maintenance, cleaning, or replacement, reducing equipment operation and maintenance difficulty, and ensuring long-term stable operation of the filtration device. Simultaneously, its overall structure is simple and rationally laid out, allowing for direct integration into existing terminal unloading systems (such as...). Figure 1 and Figure 3 As shown in the figure, it has strong adaptability and does not require large-scale modification of the original oil unloading pipeline, thus reducing the cost of technology implementation.

[0022] like Figure 1 and Figure 2 As shown, it also includes a control unit, which is electrically connected to the main electric valve 21, the branch electric valve 41, and the differential pressure gauge 5. When the impurities trapped in the filter mechanism 3 accumulate to a set amount, causing the differential pressure detected by the differential pressure gauge 5 to reach a preset threshold, the control unit automatically sends a shut-off signal to the main electric valve 21, cutting off the main filter circuit 2. At the same time, the control unit automatically sends an open signal to the branch electric valve 41, opening the filter branch circuit 4, thus achieving seamless switching of the unloading path. The automatic seamless switching of the unloading path is achieved by the control unit without manual intervention, solving the problems of unloading interruption and low efficiency caused by manual switching of the path in traditional devices, and ensuring the continuity of unloading operations. When the impurities accumulated in the filter mechanism 3 reach the preset threshold, the control unit automatically cuts off the main filter circuit 2 and opens the filter branch circuit 4, avoiding abnormal pipeline pressure and oil delivery obstruction caused by blockage of the filter mechanism 3, and reducing the risk of equipment failure.

[0023] like Figure 2 As shown, the filtration mechanism 3 is a basket filter. The basket filter has a filtration accuracy of 5-100μm, and the filter element is made of metal or polymer filter material. It is used to intercept solid impurities in the unloading medium. The basket filter's filtration accuracy of 5-100μm allows it to specifically intercept solid impurities of different particle sizes in the unloading medium, such as rust, scale, metal shavings, and dust particles. This solves the problem of insufficient filtration accuracy and inability to deeply purify oil in existing simple filtration devices, improving oil cleanliness from the source. The filter element uses metal or polymer filter material, adapting to the filtration needs of different oil media. The filter material is highly stable and has a long service life, reducing the frequency of filter element replacement and maintenance costs. The basket filter's structural design facilitates impurity interception and subsequent cleaning. Combined with its detachable feature, this further enhances the device's practicality and ease of maintenance, ensuring continuous and stable filtration efficiency.

[0024] like Figure 2 As shown, the bottom of the basket filter has an integrally formed residual liquid discharge port, which is connected to a residual liquid passage 7. A filter tail pump 8 is installed on the residual liquid passage 7, and the filter tail pump 8 is used to forcefully discharge the residual liquid containing impurities deposited in the basket filter to a designated collection area. The residual liquid passage 7 can quickly discharge the residual liquid containing impurities deposited in the filter, avoiding problems such as secondary mixing of impurities into the oil and filter corrosion caused by residual liquid retention, thus ensuring the purification effect and service life of the filtration mechanism. The filter tail pump 8 realizes the forced discharge of residual liquid, which is more efficient and thorough than natural drainage, especially suitable for the treatment of residual liquid of oil with high viscosity, ensuring that the residual liquid can be accurately delivered to the designated collection area, meeting environmental compliance requirements. The centralized collection and treatment of residual liquid avoids environmental pollution caused by the random discharge of impurities, reduces environmental governance costs, reduces the amount of sludge accumulation at the bottom of the tank, extends the tank cleaning cycle, and reduces the manpower and material input of tank cleaning operations.

[0025] In this embodiment, the filter tailing pump 8 is a self-priming centrifugal pump. Self-priming centrifugal pumps possess strong self-priming capabilities and convenient start-up, eliminating the need for additional priming liquid to extract residual liquid, thus simplifying the operation process. They also exhibit high operational stability and strong resistance to impurity interference, making them suitable for conveying residual liquids containing impurities. This reduces pump blockages and wear caused by impurities in the residual liquid, extending pump lifespan and lowering equipment maintenance costs. Furthermore, the pump's mature structure and low energy consumption allow for effective residual liquid discharge while controlling the overall operating cost of the device, thereby improving the economic efficiency of oil depot operations.

[0026] like Figure 2As shown, a first ball valve 71 is connected in series between the residual liquid discharge port of the basket filter and the inlet of the filter tail pump 8 on the residual liquid passage 7. The first ball valve 71 is used to control the opening and closing of the residual liquid passage 7. The opening and closing of the residual liquid passage 7 can be flexibly controlled by the first ball valve 71. When the filter is in normal filtration operation, the residual liquid passage 7 is closed to ensure the sealing and stability of oil transportation. When the residual liquid is discharged, the first ball valve 71 is opened to cooperate with the filter tail pump 8 to achieve rapid discharge of residual liquid. The operation is convenient and the control is precise, avoiding the problems of residual liquid leakage or incomplete discharge. The ball valve has good sealing performance, fast opening and closing response, adapts to the opening and closing control requirements of the residual liquid passage 7, and is simple to maintain and has a long service life, further improving the reliability of the device.

[0027] like Figure 2 As shown, a shut-off valve 81 is connected in series on the inlet side of the filter scavenging pump 8 on the residual liquid passage 7. The shut-off valve 81 is used to isolate the passage during maintenance of the filter scavenging pump 8. By using the shut-off valve 81, the residual liquid passage 7 can be cut off during pump maintenance, thus isolating the pump body from the pipeline, preventing residual liquid backflow or leakage, and ensuring the safety and convenience of maintenance operations. The isolation function of the shut-off valve 81 can prevent oil or residual liquid from polluting the environment during maintenance, meeting environmental compliance requirements. At the same time, it prevents impurities from entering the pump body after maintenance, ensuring the operational stability of the pump body after restarting.

[0028] like Figure 2 As shown, a check valve 82 is connected in series on the discharge end of the filter tail pump 8 in the residual liquid passage 7. The flow direction of the check valve 82 is consistent with the discharge direction of the residual liquid, which is used to prevent the discharged residual liquid from flowing back into the filter tail pump 8 or the basket filter. The check valve 82 can effectively prevent the discharged residual liquid from flowing back into the filter tail pump 8 or the basket filter, avoiding secondary contamination of the filter mechanism 3 or damage to the pump body by impurities in the residual liquid, and ensuring the purification effect and equipment safety of the device. The backflow prevention function of the check valve 82 ensures that the residual liquid can be stably delivered to the designated collection area, avoiding problems such as reduced discharge efficiency and residual liquid overflow in the collection area caused by backflow, thereby reducing environmental risks and operational hazards.

[0029] like Figure 2As shown, a second ball valve 51 is connected in series on each of the pressure tapping lines at both ends of the differential pressure gauge 5. The second ball valve 51 is used to cut off the pressure tapping path when the differential pressure gauge 5 is under maintenance or replaced. The second ball valve 51 is connected in series on the pressure tapping lines at both ends of the differential pressure gauge 5. When the differential pressure gauge 5 is under maintenance or replaced, the pressure tapping path can be cut off to prevent oil leakage from the pipeline through the pressure tapping line, ensuring the safety and cleanliness of the maintenance operation. Cutting off the pressure tapping path can prevent impurities from entering the interface of the differential pressure gauge 5 or the pressure tapping line during the maintenance process, ensuring the detection accuracy of the differential pressure gauge 5 after restarting, avoiding misjudgment of the device control logic due to detection data deviation, and ensuring the stable operation of the filtration system. The ball valve has a convenient opening and closing mechanism, good sealing performance, and is suitable for the on / off control requirements of the pressure tapping line. It does not affect the pressure transmission when the differential pressure gauge 5 is working normally, ensuring the real-time performance and accuracy of differential pressure monitoring.

[0030] The workflow is as follows: During normal oil unloading and filtration, the main electric valve 21 is open and the branch electric valve 41 is closed. The oil flows through the main filtration channel 2 and is filtered by the basket filter. As the impurities trapped by the basket filter increase, its flow resistance increases, causing the differential pressure value displayed on the differential pressure gauge 5 to gradually rise. When the differential pressure value on the differential pressure gauge 5 reaches a preset threshold (this threshold can be set according to the filter capacity and process requirements), it indicates that the basket filter is clogged and needs to be cleaned. At this time, the control unit automatically issues a command to close the main electric valve 21 and simultaneously open the branch electric valve 41. The oil then continues to be transported to the oil delivery area 6 through the filtration branch channel 4 (since oil unloading is done one at a time, the basket filter will need to be cleaned of impurities after several unloading operations; the amount that does not pass through the basket filter in a particular operation does not affect the overall quality), thus achieving continuous and uninterrupted oil unloading operations. Once this unloading operation is complete, close the main line electric valve 21 and the branch line electric valve 41, and open the filter cleaning pump 8 to drain the accumulated impurities from the basket filter. At this point, the basket filter can be opened, the filter element can be disassembled for cleaning, and after cleaning and maintenance, it can be restored to await the next unloading operation.

[0031] To ensure overall quality, when the differential pressure value on the differential pressure gauge 5 reaches the preset threshold, it is first cleaned. After cleaning, oil unloading and filtration can continue. If the filter cleaning pump 8 needs to be repaired, the circuit can be isolated by closing the shut-off valve 81. If the differential pressure gauge 5 needs to be replaced, the pressure tapping circuit is cut off by closing the second ball valves 51 at both ends to prevent oil leakage.

[0032] In summary, the advantages of this utility model are: High-efficiency filtration and continuous operation: By setting up parallel main filtration path 2 and filtration branch path 4, and combining differential pressure monitoring and automatic control, the unloading path can be automatically switched without stopping when the filter is clogged, ensuring the continuity and efficiency of the unloading operation at the terminal and avoiding production interruption.

[0033] Source purification and deep interception: Using basket filters with a filtration accuracy of 5-100μm, it can effectively intercept various solid particulate impurities in oil, from coarse to fine, improving the cleanliness of oil from the source and reducing the risk of sludge deposition in subsequent storage tanks and equipment wear.

[0034] Intelligent control and safety: The control unit automatically controls the valve action based on the differential pressure signal, realizing the intelligent filtration-switching process. It responds quickly, operates accurately, reduces human intervention, and improves the safety and reliability of the system.

[0035] Convenient and environmentally friendly residual liquid cleaning: A dedicated residual liquid passage 7 and filter tail pump 8 are set up to completely drain the impurity-containing residual liquid in the filter before maintenance, realizing "dry" cleaning of impurities, significantly reducing oil leakage and environmental pollution, and making maintenance operations safer and more environmentally friendly.

[0036] Convenient maintenance and system stability: Ball valves, shut-off valves 81 and check valves 82 are installed on key pipelines to facilitate the isolation, maintenance and replacement of components such as pumps and differential pressure gauges 5, ensuring long-term stable operation of the system and extending the service life of the equipment.

[0037] In the description of the embodiments of this application, it should be noted that the terms "inner" and "outer" and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0038] In the description of this application, the references to terms such as "an embodiment," "some embodiments," "in this embodiment," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. 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 a suitable manner in any 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.

[0039] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A dockside oil unloading filtration device, characterized in that, The system includes an oil unloading pipeline (1), a main filter pipeline (2), a filter mechanism (3), a filter branch pipeline (4), and a differential pressure gauge (5). The oil inlet of the main filter pipeline (2) is connected to the oil outlet of the oil unloading pipeline (1), and the oil outlet of the main filter pipeline (2) is connected to the oil delivery area (6). The filter mechanism (3) is detachably installed on the main filter pipeline (2), and a main electric valve (21) for controlling the on / off state of the main filter pipeline (2) is connected in series on the feed end side of the filter mechanism (3) on the main filter pipeline (2). The feed end of the filter branch pipeline (4) is connected to the oil outlet of the oil unloading pipeline (1). The oil outlet of the filter branch (4) is connected to the oil delivery area (6), and the filter main line (2) and the filter branch (4) are arranged in parallel. A branch electric valve (41) for controlling the on / off of the filter branch (4) is connected in series on the filter branch (4). One end of the differential pressure gauge (5) is connected to the filter main line (2) on the oil inlet side of the filter mechanism (3) through a pressure tapping pipeline, and the other end of the differential pressure gauge (5) is connected to the filter main line (2) on the oil outlet side of the filter mechanism (3) through a pressure tapping pipeline. The differential pressure gauge (5) is used to monitor the pressure difference between the oil inlet and outlet of the filter mechanism (3) in real time.

2. The dock unloading oil filtration device according to claim 1, characterized in that, It also includes a control unit, which is electrically connected to the main electric valve (21), the branch electric valve (41) and the differential pressure gauge (5) respectively. When the impurities trapped in the filter mechanism (3) accumulate to a set amount, causing the differential pressure gauge (5) to detect that the pressure difference between the two ends reaches a preset threshold, the control unit automatically sends a shut-off signal to the main electric valve (21) to cut off the filter main line (2). At the same time, the control unit automatically sends an open signal to the branch electric valve (41) to open the filter branch line (4) and realize seamless switching of the oil unloading passage.

3. The dock unloading oil filtration device according to claim 1, characterized in that, The filtration mechanism (3) is a basket filter with a filtration accuracy of 5-100μm. The filter element of the basket filter is made of metal or polymer filter material and is used to intercept solid impurities in the unloading medium.

4. The dock unloading oil filtration device according to claim 3, characterized in that, The bottom of the basket filter is integrally formed with a residual liquid discharge port, which is connected to a residual liquid passage (7); a filter tail pump (8) is provided on the residual liquid passage (7), and the filter tail pump (8) is used to force the residual liquid containing impurities deposited in the basket filter to be discharged to a designated collection area.

5. The dock unloading oil filtration device according to claim 4, characterized in that, The filter tail pump (8) is a self-priming centrifugal pump.

6. The wharf oil unloading filtration device according to claim 4, characterized in that, A first ball valve (71) is connected in series between the residual liquid discharge port of the basket filter and the inlet of the filter tail pump (8) on the residual liquid passage (7). The first ball valve (71) is used to control the opening and closing of the residual liquid passage (7).

7. The dock unloading oil filtration device according to claim 4, characterized in that, A shut-off valve (81) is connected in series on the residual liquid passage (7) at the inlet end of the filter tail pump (8). The shut-off valve (81) is used to isolate the passage when the filter tail pump (8) is under maintenance.

8. The dock unloading oil filtration device according to claim 6, characterized in that, A check valve (82) is connected in series on the residual liquid passage (7) at the outlet end of the filter tail pump (8). The flow direction of the check valve (82) is consistent with the discharge direction of the residual liquid, and is used to prevent the discharged residual liquid from flowing back into the filter tail pump (8) or basket filter.

9. The dock unloading oil filtration device according to claim 1, characterized in that, A second ball valve (51) is connected in series on the pressure tapping lines at both ends of the differential pressure gauge (5). The second ball valve (51) is used to cut off the pressure tapping path when the differential pressure gauge (5) is under maintenance or replaced.

Images