An automated mechanical cleaning device for oil storage tanks

Abstract

This utility model provides an automated mechanical cleaning device for oil storage tanks, belonging to the field of tank cleaning technology. It includes a container with a vacuum buffer tank fixedly installed inside. A dual-basket filter sprays water into the vacuum buffer tank through a spray gun. The dual-basket filter uses a parallel dual-basket design to filter impurities in the cleaning fluid, ensuring unobstructed spraying. The drain outlet of the vacuum buffer tank is connected to a cooling water tank fixed inside the container. The cooling water tank is connected to a plate heat exchanger via a water ring vacuum pump. The plate heat exchanger is connected to the vacuum buffer tank via a cleaning pump. A water circulation system is formed by the cooling water tank, the water ring vacuum pump, and the plate heat exchanger. After cooling in the cooling tank, the water undergoes secondary temperature control via the plate heat exchanger, and finally, the cleaning pump provides the circulation power. A spare outlet supports multiple spray gun operations, ensuring the efficiency of the cleaning process. Simultaneously, the water can be continuously recycled, avoiding water waste.

Description

Technical Field

[0001] This utility model relates to the field of oil tank cleaning technology, specifically to an automated mechanical cleaning device for oil tanks. Background Technology

[0002] Oil storage tanks are containers for storing oil products and are the main facilities of oil depots. Based on their architectural features, oil storage tanks can be divided into above-ground oil tanks, underground oil tanks, and cavern oil tanks. Based on their material, they can be divided into two main categories: non-metallic oil tanks and metallic oil tanks. Metallic oil tanks can be further classified by shape into three types: vertical cylindrical, horizontal cylindrical, and spherical. Metallic oil tanks are widely used due to their low cost, leak-proof nature, ease of construction, and simple maintenance.

[0003] The following problems were found in the relevant technology: After long-term operation or idleness, the oil storage tanks settle over the years, and impurities accumulate, producing oil residue, sludge, and sediment. These sediments contain corrosion products from the tank bottom plate caused by the detachment of internal anti-corrosion materials. In order to ensure production safety, eliminate equipment hazards, and guarantee product quality, it is necessary to clean and repair the oil storage tanks regularly. To address this, we have proposed an automated mechanical cleaning device for oil storage tanks.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background section of this application, and therefore may include prior art information that does not constitute prior art information known to those skilled in the art. Utility Model Content

[0005] This utility model aims to solve at least one of the technical problems existing in the prior art or related technologies. To address the problem of cleaning refined oil storage tanks in the prior art, this utility model provides an automated mechanical cleaning device for oil storage tanks, the specific technical solution of which is as follows:

[0006] An automated mechanical cleaning device for oil storage tanks includes a container, inside which a vacuum buffer tank is fixedly installed. The inlet of the vacuum buffer tank is connected to a double-basket filter fixed inside the container. The double-basket filter is supplied with water through a vertical spiral plate heat exchanger. The double-basket filter sprays water into the vacuum buffer tank through a spray gun. The outlet of the vacuum buffer tank is connected to a cooling water tank fixed inside the container. The cooling water tank is connected to a plate heat exchanger through a water ring vacuum pump. The plate heat exchanger is connected to the vacuum buffer tank through a cleaning pump.

[0007] In the above technical solution, the plate heat exchanger and the cleaning pump are connected through a steam-water separator fixed inside the container, and a gas monitoring instrument connected to the steam-water separator is fixed inside the container.

[0008] The drain port of the vacuum buffer tank is connected to an oil-water separator fixed inside the container. The water outlet of the oil-water separator is connected to the cooling water tank. The oil outlet of the oil-water separator is connected to an oil collection tank fixed inside the container. An oil collection tank is fixedly installed inside the container. The oil collection tank is connected to the oil collection tank through a pneumatic diaphragm pump.

[0009] An inert gas generator is fixedly installed on the container, and the inert gas generator is connected to the inner cavity of the vacuum buffer tank.

[0010] The spray gun is powered by an air compressor.

[0011] The dual-basket filter uses a DN100 flange interface.

[0012] The cleaning pump is equipped with a backup outlet.

[0013] The vacuum buffer tank is equipped with a spare interface.

[0014] Compared with the prior art, the beneficial effects of this utility model are: the automated mechanical cleaning equipment for oil storage tanks:

[0015] 1. A water circulation system is formed by cooling water tank 7, water ring vacuum pump and plate heat exchanger 8. After cooling water tank 7 cools down, it passes through plate heat exchanger 8 for secondary temperature control. Finally, the cleaning pump 9 provides circulation power. The spare outlet supports multi-spray gun operation, which ensures the efficiency of the cleaning process. At the same time, the water can be continuously recycled to avoid water waste.

[0016] 2. The parallel switching design of the dual basket filter allows for online replacement of the filter basket, avoiding cleaning interruptions, and achieves a filtration accuracy of 50μm, preventing spray gun clogging.

[0017] 3. The inert gas generator controls the oxygen content of the entire process to ≤2%, and combined with the interlocking alarm of the gas monitor, it eliminates the risk of oil and gas explosions. It is suitable for storage tanks of volatile oil products such as gasoline and diesel.

[0018] IV. The 15MPa spray gun pressure combined with 60℃ hot water improves the peeling efficiency of paraffin-based oil stains by 3 times compared with room temperature cleaning, and shortens the cleaning cycle from 48 hours of traditional manual cleaning to 12 hours. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of an automated mechanical cleaning device for oil storage tanks according to the present invention;

[0020] Figure 2 This is a top view of the structure of an automated mechanical cleaning device for oil storage tanks according to this utility model;

[0021] Figure 3This is a schematic diagram of the water ring vacuum pump part of this utility model;

[0022] Figure 4 This is a schematic diagram of the cleaning pump part of this utility model;

[0023] Figure 5 This is a schematic diagram of the vacuum buffer tank part of this utility model;

[0024] Figure 6 This is a schematic diagram of the structure of the double-basket filter part of this utility model;

[0025] Figure 7 This is a top view of the structure of the double-basket filter part of this utility model;

[0026] Figure 8 This is a schematic diagram of the vertical spiral plate heat exchanger of this utility model.

[0027] in, Figures 1 to 8 The correspondence between the reference numerals and component names in the attached drawings is as follows: 1-Container, 2-Vacuum buffer tank, 4-Double basket filter, 5-Vertical spiral plate heat exchanger, 6-Spray gun, 7-Cooling water tank, 8-Plate heat exchanger, 9-Cleaning pump, 10-Steam-water separator, 11-Gas monitor, 12-Oil-water separator, 13-Oil collection tank, 14-Oil collection box, 15-Pneumatic diaphragm pump, 16-Inert gas generator. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] The following are specific implementation cases and appendices. Figure 1-8 The present invention will be further described below, but the present invention is not limited to these embodiments.

[0030] An automated mechanical cleaning device for oil storage tanks includes a container 1, inside which a vacuum buffer tank 2 is fixedly installed. The container 1 is an integrated frame, with all components fixed to the bottom of its inner cavity. The integrated frame facilitates transportation and on-site deployment, and the components are protected by the top of the container 1. The water inlet of the vacuum buffer tank 2 is connected to a double-basket filter 4 fixed inside the container 1. The double-basket filter 4 is supplied with water through a vertical spiral plate heat exchanger 5. The cleaning fluid is heated by the vertical spiral plate heat exchanger 5, improving the dissolution efficiency of oil stains adhering to the tank during the cleaning process.

[0031] The dual-basket filter 4 sprays water into the vacuum buffer tank 2 through the spray gun 6. The dual-basket filter 4 adopts a parallel dual-basket design to filter impurities in the cleaning fluid and ensure that the spray gun 6 is unobstructed. The drain port of the vacuum buffer tank 2 is connected to a cooling water tank 7 fixed inside the container 1. The cooling water tank 7 is connected to a plate heat exchanger 8 through a water ring vacuum pump. The plate heat exchanger 8 is connected to the vacuum buffer tank 2 through a cleaning pump 9.

[0032] The water circulation system consists of a cooling water tank 7, a water ring vacuum pump, and a plate heat exchanger 8. After cooling in the cooling water tank 7, the water undergoes secondary temperature control in the plate heat exchanger 8, and finally, the cleaning pump 9 provides circulation power. The backup outlet supports multiple spray gun operations, ensuring the efficiency of the cleaning process. At the same time, the water can be continuously recycled, avoiding water waste.

[0033] The plate heat exchanger 8 and the cleaning pump 9 are connected by a steam-water separator 10 fixed inside the container 1. A gas monitor 11 connected to the steam-water separator 10 is fixed inside the container 1.

[0034] It is worth noting that the drain port of the vacuum buffer tank 2 is connected to an oil-water separator 12 fixed inside the container 1. The water outlet of the oil-water separator 12 is connected to the cooling water tank 7. The oil outlet of the oil-water separator 12 is connected to an oil collection tank 13 fixed inside the container 1. An oil collection tank 14 is fixedly installed inside the container 1. The oil collection tank 14 is connected to the oil collection tank 13 through a pneumatic diaphragm pump 15.

[0035] The oil-water separator 12, the oil collection tank 13, and the oil collection box 14 form a three-stage separation and recovery system to improve the oil recovery rate.

[0036] In addition, an inert gas generator 16 is fixedly installed on the container 1, and the inert gas generator 16 is connected to the inner cavity of the vacuum buffer tank 2. Nitrogen gas is introduced into the vacuum buffer tank 2 through the inert gas generator 16 to suppress the risk of oil and gas explosion, thereby improving the safety of the cleaning process.

[0037] In addition, the spray gun 6 is powered by an air compressor.

[0038] Furthermore, the interface of the dual basket filter 4 adopts a DN100 flange interface.

[0039] A spare outlet is provided on the cleaning pump 9.

[0040] The vacuum buffer tank 2 is equipped with a spare interface. An exhaust port is provided on the top of the vacuum buffer tank 2.

[0041] First, nitrogen gas is introduced into the vacuum buffer tank 2 through the inert gas generator 16 to replace the internal air and establish an inert environment. Then, the cleaning pump 9 draws water from the cooling water tank 7, heats it to the set temperature through the plate heat exchanger 8, filters it through the double basket filter 4, and sprays it onto the inner wall of the tank at high pressure by the spray gun 6 to remove oil stains. The cleaning fluid carrying the oil stains flows back to the vacuum buffer tank 2. After preliminary gas-liquid separation, the liquid part flows into the oil-water separator 12. The oil-water separator 12 uses gravity separation based on density difference. The oil phase enters the oil collection tank 13, and the water phase flows back to the cooling water tank 7 for recycling. The oil-gas mixture discharged from the top of the vacuum buffer tank 2 is dehydrated by the gas-water separator 10. The gas monitor 11 detects the combustible gas concentration in real time. It is discharged after meeting the standard. If the standard is exceeded, the inert gas is replenished.

[0042] The recovered oil in the oil collection tank 13 is transported to the oil collection box 14 by the pneumatic diaphragm pump 15. The water content is ≤0.5%, and it can be directly returned to the warehouse.

[0043] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not 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 utility model.

[0044] Furthermore, the terms "first," "second," "third," and "fourth" 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," "second," "third," or "fourth" may explicitly or implicitly include at least one of those features.

[0045] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0046] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automated mechanical cleaning device for oil storage tanks, characterized in that: The container includes a container (1), inside which a vacuum buffer tank (2) is fixedly installed. The inlet of the vacuum buffer tank (2) is connected to a double basket filter (4) fixed inside the container (1). The double basket filter (4) is supplied with water through a vertical spiral plate heat exchanger (5). The double basket filter (4) sprays water into the vacuum buffer tank (2) through a spray gun (6). The outlet of the vacuum buffer tank (2) is connected to a cooling water tank (7) fixed inside the container (1). The cooling water tank (7) is connected to a plate heat exchanger (8) through a water ring vacuum pump. The plate heat exchanger (8) is connected to the vacuum buffer tank (2) through a cleaning pump (9).

2. The automated mechanical cleaning equipment for oil storage tanks according to claim 1, characterized in that: The plate heat exchanger (8) and the cleaning pump (9) are connected by a steam-water separator (10) fixed inside the container (1). A gas monitor (11) connected to the steam-water separator (10) is fixed inside the container (1).

3. The automated mechanical cleaning equipment for oil storage tanks according to claim 1, characterized in that: The drain port of the vacuum buffer tank (2) is connected to an oil-water separator (12) fixed inside the container (1). The water outlet of the oil-water separator (12) is connected to the cooling water tank (7). The oil outlet of the oil-water separator (12) is connected to an oil collection tank (13) fixed inside the container (1). An oil collection tank (14) is fixedly installed inside the container (1). The oil collection tank (14) is connected to the oil collection tank (13) through a pneumatic diaphragm pump (15).

4. The automated mechanical cleaning equipment for oil storage tanks according to claim 1, characterized in that: An inert gas generator (16) is fixedly installed on the container (1), and the inert gas generator (16) is connected to the inner cavity of the vacuum buffer tank (2).

5. The automated mechanical cleaning equipment for oil storage tanks according to claim 1, characterized in that: The spray gun (6) is powered by an air compressor.

6. The automated mechanical cleaning equipment for oil storage tanks according to claim 1, characterized in that: The interface of the double basket filter (4) adopts a DN100 flange interface.

7. The automated mechanical cleaning equipment for oil storage tanks according to claim 1, characterized in that: The cleaning pump (9) is equipped with a spare outlet.

8. The automated mechanical cleaning equipment for oil storage tanks according to claim 1, characterized in that: The vacuum buffer tank (2) is equipped with a spare interface.

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