An oil storage system utilizing abandoned open-pit mines

Abstract

The present invention discloses an oil storage system using abandoned open-pit mines. The open-pit mine is used for injecting water and includes an oil storage tank and an oil delivery system. Among them, the oil storage tank is provided with an oil inlet and outlet, and the oil storage tank is fixed at the bottom of the open-pit mine; the oil delivery system includes a high-pressure oil pipeline, and a ground oil tank, a two-way high-pressure oil pump, an oil pipeline flowmeter, and an oil pipeline solenoid valve are sequentially arranged in the direction of the high-pressure oil pipeline leading to the oil storage tank. Compared with the prior art, the present invention has strong operability and small engineering quantity, can realize the full utilization of the huge space of the mine pit, and ensure the safety of the oil storage bin.

Description

Technical Field

[0001] The present invention relates to the technical field of oil storage systems, and particularly to an oil storage system using abandoned open-pit mines. Background Art

[0002] Open-pit mining is an important way of coal mining or metal mining. The number and production capacity scale of open-pit mines are increasing, and the number of closed or closing open-pit mines is also increasing. After an open-pit mine is closed, a huge abandoned open-pit mine will be left, so the treatment and utilization of the space resources of the abandoned open-pit mine are particularly important. At present, the main measures for the treatment and utilization of abandoned open-pit mines are: earthwork backfilling, transformation into a landscape park or a holiday hotel, etc. However, they have large investment, low space utilization rate, and are limited by geographical location and environmental conditions. On the other hand, as an important fossil energy, oil has always been an important strategic reserve resource for each country. However, due to site, safety and investment considerations, the current oil storage capacity in China is far from sufficient, and there is an urgent need to design and build a large number of oil storage tanks through technical means to meet the storage needs. Using abandoned open-pit mines to build oil storage tanks has become an important innovation direction. Therefore, how to provide an oil storage system with strong operability, small project volume, which can make full use of the huge space of the mine pit and ensure the safety of the oil storage tank is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0003] The purpose of the present invention is to provide an oil storage system using abandoned open-pit mines, aiming to solve the technical problems of low utilization rate of abandoned open-pit mines, poor operability, large project volume, low oil storage capacity and poor safety.

[0004] To achieve the above purpose, the present invention provides the following solutions:

[0005] The present invention discloses an oil storage system using abandoned open-pit mines. The open-pit mine is used for injecting water and includes:

[0006] An oil storage tank, which is provided with an oil inlet and outlet, and is fixed at the bottom of the open-pit mine.

[0007] An oil delivery system, which includes a high-pressure oil pipeline. A ground oil tank, a two-way high-pressure oil pump, an oil flow meter and an oil pipeline solenoid valve are sequentially arranged on the high-pressure oil pipeline in the direction leading to the oil storage tank.

[0008] Preferably, the internal space of the oil storage tank is sequentially a gas storage area, an oil storage area and a water storage area from top to bottom. The oil inlet and outlet are located in the oil storage area. A gas inlet and outlet is provided on the oil storage tank corresponding to the gas storage area, and a water body inlet and outlet is provided on the oil storage tank corresponding to the water storage area.

[0009] Preferably, an inert gas delivery system is further included. The inert gas delivery system includes a high-pressure gas pipeline, and a ground gas station, a high-pressure gas pump, and a gas solenoid valve are sequentially arranged in the direction of the high-pressure gas pipeline leading to the oil storage tank.

[0010] Preferably, a water delivery system is further included. The water delivery system includes a high-pressure water pipeline, and a ground water tank, a two-way high-pressure water pump, a water flow meter, and a water solenoid valve are sequentially arranged in the direction of the high-pressure water pipeline leading to the oil storage tank.

[0011] Preferably, a gas relief valve is further included. A first relief port is further provided on the oil storage tank corresponding to the gas storage area, and the gas relief valve is arranged at the first relief port.

[0012] Preferably, a liquid relief valve is further included. A second relief port is further provided on the oil storage tank corresponding to the water storage area, and the liquid relief valve is arranged at the second relief port.

[0013] Preferably, a gas pressure gauge and an underwater pressure gauge are further included. The gas pressure gauge is used to measure the real-time pressure of the gas storage area, and the underwater pressure gauge is used to measure the real-time pressure underwater in the open-pit mine.

[0014] Preferably, a ground anchor, a connecting rope, and a tensile force monitor are further included. The ground anchor is buried in the bottom of the open-pit mine, and

[0015] One end of the connecting rope is fixedly connected to the ground anchor, the other end of the connecting rope is fixedly connected to the outer wall of the oil storage tank, and the tensile force monitor is fixed on the connecting rope.

[0016] Preferably, a connecting ring is further included. There are multiple connecting rings and they are fixed on the outer wall of the oil storage tank, and the other end of the connecting rope is fixed on the connecting ring.

[0017] Preferably, a buffer layer is further included. The buffer layer is arranged on the bottom of the open-pit mine, and the buffer layer can prevent the oil storage tank from directly contacting the bottom of the open-pit mine.

[0018] The present invention has achieved the following technical effects compared with the prior art:

[0019] The oil storage system using abandoned open-pit mines provided by the present invention has the open-pit mine for injecting water, and includes an oil storage tank and an oil delivery system. After the open-pit mining is completed, the oil storage tank is fixedly connected to the bottom surface of the pit, and the oil delivery system is installed and connected to the oil storage tank, which improves the utilization rate of the abandoned open-pit mine, the oil storage capacity, has good operability and small engineering quantity. Water is injected into the open-pit mine, and the water injected into the open-pit mine submerges the top of the oil storage tank. The water surface above the oil storage tank plays a protective role, which not only prevents external impacts, but also can relieve the influence of temperature changes to a certain extent, and can also isolate oxygen and eliminate the explosion risk, ensuring the safety performance of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is a schematic structural diagram of the oil storage system in this embodiment;

[0022] Wherein: 1 - oil storage tank; 2 - oil storage area; 3 - gas storage area; 4 - water storage area; 5 - gas inlet and outlet; 6 - oil inlet and outlet; 7 - water body inlet and outlet; 8 - oil delivery system; 9 - inert gas delivery system; 10 - water body delivery system; 11 - gas relief valve; 12 - liquid relief valve; 13 - gas pressure gauge; 14 - underwater pressure gauge; 15 - ground anchor; 16 - connecting rope; 17 - tension monitor; 18 - connecting ring; 19 - buffer layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0024] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0025] As Figure 1 shown, this embodiment provides an oil storage system using an abandoned open-pit mine. The open-pit mine is used for injecting water and includes: an oil storage tank 1 and an oil delivery system 8.

[0026] Among them, the oil storage tank 1 is provided with an oil inlet and outlet 6, and the oil storage tank 1 is fixed at the bottom of the open-pit mine; the oil delivery system 8 includes a high-pressure oil pipeline, and a ground oil tank, a two-way high-pressure oil pump, an oil pipeline flowmeter, and an oil pipeline solenoid valve are sequentially arranged in the direction of the high-pressure oil pipeline leading to the oil storage tank 1.

[0027] In this embodiment, after the open-pit mine is mined out, the oil storage tank 1 is fixedly connected to the ground at the bottom of the mine pit, the oil delivery system 8 is installed and connected to the oil storage tank 1, water is injected into the open-pit mine, and the water injected into the open-pit mine submerges the top of the oil storage tank 1. The water surface on the upper part of the oil storage tank 1 plays a protective role, preventing external force strikes, alleviating the influence of temperature changes to a certain extent, isolating oxygen, eliminating the explosion risk, and ensuring the safety performance of the device. This device does not occupy ground and water surface space, and the water surface space can be used for other industries, improving the space utilization rate, and effectively increasing the oil storage capacity. It has the characteristics of good operability and small engineering quantity. In this embodiment, the internal space of the oil storage tank 1 from top to bottom is sequentially a gas storage area 3, an oil storage area 2, and a water storage area 4. The oil inlet and outlet 6 is located in the oil storage area 2. A gas inlet and outlet 5 is provided on the oil storage tank 1 corresponding to the gas storage area 3, and a water body inlet and outlet 7 is provided on the oil storage tank 1 corresponding to the water storage area 4. Further, this embodiment also includes an inert gas delivery system 9. The inert gas delivery system 9 includes a high-pressure gas pipeline, and a ground gas station, a high-pressure gas pump, and a gas solenoid valve are sequentially arranged in the direction of the high-pressure gas pipeline leading to the oil storage tank 1. Even further, this embodiment also includes a water body delivery system 10. The water body delivery system 10 includes a high-pressure water pipeline, and a ground water tank, a two-way high-pressure water pump, a water pipeline flowmeter, and a water pipeline solenoid valve are sequentially arranged in the direction of the high-pressure water pipeline leading to the oil storage tank 1. By introducing or extracting inert gas into the oil storage tank 1 through the inert gas delivery system 9, it can effectively ensure that the pressure in the oil storage tank 1 is the same as the underwater pressure when using or storing oil, and by introducing or extracting water into the oil storage tank 1 through the water body delivery system 10, it can effectively ensure that the gravity of the oil storage tank 1 is the same as the buoyancy it receives when using or storing oil, keeping the oil storage tank 1 suspended in water, and further improving the safety and operability of the device.

[0028] Further, this embodiment also includes a gas pressure gauge 13 and an underwater pressure gauge 14. The gas pressure gauge 13 is used to measure the real-time pressure in the gas storage area 3, and the underwater pressure gauge 14 is used to measure the real-time pressure underwater in the open-pit mine. It can make the pressure in the oil storage tank 1 balance with the underwater pressure, reduce the requirement for the structural strength of the oil storage tank 1, and further improve the safety of this device.

[0029] Further, this embodiment further includes a ground anchor 15, a connecting rope 16, a tension monitor 17, and a connecting ring 18. The ground anchor 15 is buried in the bottom of the open-pit mine. One end of the connecting rope 16 is fixedly connected to the ground anchor 15. The connecting ring 18 is fixed to the outer wall of the oil storage tank 1. The other end of the connecting rope 16 is fixed to the connecting ring 18, which can effectively fix the oil storage tank 1 and keep it stable in the water, improving the operability of the oil storage tank 1. At the same time, it can prevent the oil storage tank 1 from rolling or drifting significantly in the water, ensuring the normal operation of the device. The tension monitor 17 is fixed on the connecting rope 16 to monitor the tension of the connecting rope in real time, avoiding the breakage of the connecting rope when the tension it bears is too large, and the situation of the oil storage tank turning over or sinking when the tension of the connecting rope is too small, further improving the safety of the device.

[0030] In this embodiment, the number of connecting rings 18 is preferably 4. The vertical distances from the 4 connecting rings 18 to the bottom of the open-pit mine are equal and are evenly arranged circumferentially along the outer wall of the oil storage tank 1, making the force on the oil storage tank 1 more uniform, ensuring that the tensions on each connecting rope are the same, and improving the stability of the device.

[0031] In this embodiment, the material of the connecting rope 16 is preferably stainless steel, which has the characteristics of high corrosion resistance and high strength.

[0032] In this embodiment, the buffer layer 19 is a fine sand accumulation layer. The buffer layer 19 is arranged on the bottom of the open-pit mine, which can prevent the oil storage tank 1 from directly contacting the bottom of the open-pit mine, enabling the oil storage tank 1 to land softly when it falls, thus avoiding damage and improving the safety of the device. Those skilled in the art can also select other buffering methods according to needs.

[0033] In this embodiment, the connecting rope 16 is connected to the connecting ring 18. After the open-pit mining is completed, the ground anchor 15 is buried in the bottom of the mine pit. The ground anchors 15 are evenly arranged in the horizontal and vertical directions at the bottom of the mine pit. Multiple ground anchors 15 are connected to each other. Each ground anchor 15 is connected to 4 connecting ropes 16. Fine sand is laid with the center of the 4 ground anchors 15 as the midpoint, and the thickness of the fine sand decreases from the center to the edge. Every adjacent 4 connecting ropes 16 are connected to the four connecting rings 18 of the same oil storage tank 1, and the oil storage tank 1 is placed at the center of the 4 fine sand accumulation layers. When the oil storage tank 1 falls, the fine sand accumulation layer can effectively buffer it and prevent the oil storage tank from being damaged.

[0034] The specific steps during the operation of the oil storage system in this embodiment are as follows:

[0035] First, close all solenoid valves, inject water into the mine pit, and straighten the connecting rope 16 after the oil storage tank 1 floats. Then open the waterway solenoid valve, start the two-way high-pressure water pump, inject water into the oil storage tank 1, and introduce or extract inert gas to keep the pressure in the oil storage tank 1 consistent with the underwater pressure in the mine pit. When the gravity of the oil storage tank 1 is equal to the buoyancy it receives, stop injecting water.

[0036] When oil needs to be stored, the waterway solenoid valve opens, the two-way high-pressure water pump starts, and the water in the oil tank is pumped out. At the same time, the oilway solenoid valve opens, the high-pressure oil pump starts, and oil is injected into the storage oil tank 1 to keep the gravity of the storage oil tank 1 equal to the buoyancy it receives. The real-time flow is monitored through the oilway flowmeter and the waterway flowmeter, and the ratio of the volume of the pumped-out water to the volume of the injected oil is kept as the inverse ratio of their densities. The storage oil tank 1 floats in water, which can reduce the force on the connecting rope 16. The gas solenoid valve is opened to introduce or extract inert gas to keep the pressure in the storage oil tank 1 consistent with the underwater pressure in the mine pit.

[0037] When using oil, the operation process is the same as when storing oil. While pumping out the oil in the storage oil tank 1, water is injected into it to keep the gravity of the storage oil tank 1 equal to the buoyancy it receives. Inert gas is introduced or extracted to keep the pressure in the storage oil tank 1 consistent with the underwater pressure in the mine pit.

[0038] Furthermore, it also includes a gas pressure relief valve 11. There is also a first pressure relief port on the storage oil tank 1 corresponding to the gas storage area 3, and the gas pressure relief valve 11 is arranged at the first pressure relief port. Specifically, it also includes a liquid pressure relief valve 12. There is also a second pressure relief port on the storage oil tank 1 corresponding to the water storage area 4, and the liquid pressure relief valve 12 is arranged at the second pressure relief port.

[0039] In this embodiment, by comparing the pressure value of the gas pressure gauge 13 with the pressure value of the underwater pressure gauge 14, the gas pressure relief valve 11 is opened or closed to introduce or discharge inert gas to keep the pressure in the storage oil tank 1 consistent with the underwater pressure. When the value of the tension monitor 17 is lower than the set value, the liquid pressure relief valve 12 is opened to discharge the water in the tank, and the gravity of the storage oil tank 1 is balanced with the buoyancy it receives, which further improves the safety of the device.

[0040] In this specification, specific examples are used to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. An oil storage system using abandoned open-pit mines, where the open-pit mines are used for water injection, characterized in that, Comprising: An oil storage tank, which is provided with an oil inlet and outlet. The oil storage tank is fixed at the bottom of an open-pit mine and suspended in the water of the open-pit mine. The internal space of the oil storage tank is successively a gas storage area, an oil storage area, and a water storage area from top to bottom. A gas inlet and outlet is provided on the oil storage tank corresponding to the gas storage area; An inert gas delivery system for introducing or extracting inert gas into or from the oil storage tank. It also includes a gas pressure gauge and a submersible pressure gauge. The gas pressure gauge is used to measure the real-time pressure of the gas storage area, and the submersible pressure gauge is used to measure the real-time pressure underwater in the open-pit mine; An oil delivery system, which includes a high-pressure oil pipeline. A ground oil tank, a two-way high-pressure oil pump, an oil flow meter, and an oil pipeline solenoid valve are successively arranged in the direction of the high-pressure oil pipeline leading to the oil storage tank; It also includes a gas relief valve. A first relief port is also provided on the oil storage tank corresponding to the gas storage area. The gas relief valve is arranged at the first relief port. By comparing the pressure value of the gas pressure gauge with the pressure value of the submersible pressure gauge, the gas relief valve is opened or closed to introduce or discharge inert gas, so as to keep the pressure in the oil storage tank consistent with the underwater pressure; It also includes a liquid relief valve. A second relief port is also provided on the oil storage tank corresponding to the water storage area. The liquid relief valve is arranged at the second relief port. It also includes a ground anchor, a connecting rope, and a tension monitor. The ground anchor is buried in the bottom of the open-pit mine. One end of the connecting rope is fixedly connected to the ground anchor, and the other end of the connecting rope is fixedly connected to the outer wall of the oil storage tank. The tension monitor is fixed on the connecting rope. When the value of the tension monitor is lower than the set value, the liquid relief valve is opened to discharge the water body in the oil storage tank, and the gravity of the oil storage tank is balanced with the buoyancy it receives.

2. The oil storage system using abandoned open-pit mines according to claim 1, characterized in that, The oil inlet and outlet is located in the oil storage area. A water body inlet and outlet is provided on the oil storage tank corresponding to the water storage area.

3. The oil storage system using abandoned open-pit mines according to claim 2, characterized in that, The inert gas delivery system includes a high-pressure gas pipeline. A ground gas station, a high-pressure gas pump, and a gas pipeline solenoid valve are successively arranged in the direction of the high-pressure gas pipeline leading to the oil storage tank.

4. The oil storage system using abandoned open-pit mines according to claim 2, characterized in that, It also includes a water body delivery system, which includes a high-pressure water pipeline. A ground water tank, a two-way high-pressure water pump, a water flow meter, and a water pipeline solenoid valve are successively arranged in the direction of the high-pressure water pipeline leading to the oil storage tank.

5. The oil storage system using abandoned open-pit mines according to claim 1, characterized in that, It also includes connecting rings. There are multiple connecting rings and they are fixed on the outer wall of the oil storage tank. The other end of the connecting rope is fixed to the connecting ring.

6. The oil storage system using abandoned open-pit mines according to claim 5, characterized in that, It also includes a buffer layer, which is arranged on the bottom of the open-pit mine. The buffer layer can prevent the oil storage tank from directly contacting the bottom of the open-pit mine.

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