Double-layer barrier anti-explosion oil storage tank

Abstract

The invention relates to the technical field of oil storage tanks, in particular to a double-layer blocking anti-explosion oil storage tank. The oil storage tank comprises an installation support, an oil storage tank body is installed above the installation support, the oil storage tank body is of a double-layer structure, and the anti-explosion, flame-retardant, corrosion-resistant and wear-resistant effects of the oil storage tank body are improved through the oil storage tank body of the double-layer structure. By means of the oil storage tank body of the double-layer structure, the good anti-explosion, flame-retardant, corrosion-resistant and wear-resistant effects can be achieved, the anti-explosion and flame-retardant performance of the oil storage tank is greatly improved, even if the inner tank leaks and the like, the outer tank can achieve a certain blocking effect, the risk of explosion caused by the fact that oil makes contact with an external fire source is reduced, and the service life of the oil storage tank is prolonged. And the oil is not easy to pollute after long-time use.

Description

Technical Field

[0001] The present invention relates to the technical field of oil storage tanks, in particular to a double-layer barrier explosion-proof oil storage tank. Background Art

[0002] Oil storage tanks, also known as oil tanks or storage tanks for short, are large containers with relatively regular shapes used to store oil products. They provide temporary storage space for oil and gas before offshore production, processing, and export, ensuring the continuity and safety of the production process. Conventional oil storage tanks on offshore oil and gas platforms are used specifically to store crude oil, natural gas, or petroleum products extracted from offshore oil and gas platforms. They are directly deployed on offshore oil and gas platforms or floating production storage and offloading units (FPSOs) and integrated with drilling, production, and processing systems. They are mainly made of high-strength carbon steel or stainless steel.

[0003] During the actual use of conventional oil storage tanks on offshore oil and gas platforms, there may be potential risks of fire and explosion. However, offshore platforms are usually unmanned or have few people on duty. The platform's electrical equipment is concentrated and highly automated. In emergency situations, such as equipment failure, fire or the early stages of an explosion, manual intervention cannot be performed immediately, delaying the best time to deal with it. The marine environment is harsh, and salt spray corrosion has a greater impact on equipment. In addition, there are no 24-hour fire support ships on standby for rescue, and it is difficult for operation and maintenance ships to reach observation towers in time. Once a fire occurs, it is difficult to extinguish it quickly in the early stages, and the fire may quickly spread to the entire platform. In view of this, we propose a double-layer barrier explosion-proof oil storage tank. Summary of the Invention

[0004] The present invention aims to solve the technical problems existing in the prior art and provides a double-layer barrier explosion-proof oil storage tank to solve the existing offshore platforms that are usually unmanned or have few people on duty. The electrical equipment on the platform is concentrated and the degree of automation is high. In emergency situations, such as equipment failure, fire or the early stage of explosion, manual intervention cannot be carried out immediately, delaying the best time to deal with it; the marine environment is harsh and salt spray corrosion has a great impact on the equipment; in addition, there are no 24-hour fire support ships on standby for rescue at any time, and it is difficult for operation and maintenance ships to reach the observation tower in time. Once a fire occurs, it is difficult to extinguish it quickly in the early stage and the fire may quickly spread to the entire platform.

[0005] To achieve the above-mentioned purpose, the present invention provides a double-layer barrier explosion-proof oil storage tank, including a mounting bracket, an oil storage tank body is installed above the mounting bracket, and the oil storage tank body is configured as a double-layer structure, wherein: the double-layer structure of the oil storage tank body improves its explosion-proof, flame-retardant, corrosion-resistant and wear-resistant effects.

[0006] Beneficial effects of the present invention:

[0007] By providing an oil storage tank body with a double-layer structure, it can play a better role in explosion-proof, flame-retardant, corrosion-resistant and wear-resistant, and the oil is not easily contaminated after long-term use.

[0008] On the basis of the above technical solution, the present invention can also be improved as follows.

[0009] As a further improvement of the present technical solution, the oil storage tank body includes an outer tank and an inner tank, and a base is installed at the bottom end of the inner tank, and the base is welded and fixed to the bottom of the outer tank. A cavity is formed between the inner wall of the outer tank and the outer wall of the inner tank, and a monitoring component is installed inside the cavity. The monitoring component includes a combustible gas detector and a temperature and smoke probe, and one end of the combustible gas detector and the temperature and smoke probe is set in the external space. The monitoring component also includes a liquid level gauge, which is used to monitor the changes in the liquid level inside the oil storage tank body. A thermometer and a pressure gauge are installed on the outer wall of the outer tank.

[0010] The beneficial effect of adopting the above further solution is that the gas concentration, temperature and liquid level changes inside the oil storage tank can be monitored in real time through the monitoring component, providing data support for safety management; when an abnormal situation is detected, the monitoring component can promptly issue an early warning signal to remind staff to take corresponding measures.

[0011] As a further improvement of this technical solution, a ventilation assembly is installed on the outer wall of the outer tank, which is used to reduce heat accumulation inside the oil storage tank body. The ventilation assembly includes a fan and a ventilation valve, and the fan and the ventilation valve are connected by an air duct.

[0012] The beneficial effect of adopting the above further solution is that the ventilation component can discharge the accumulated heat inside the oil storage tank in time, reduce the temperature of the oil product, and reduce safety hazards; the pressure inside the oil storage tank is adjusted by the ventilation valve to prevent accidents such as explosion due to excessive pressure.

[0013] As a further improvement of the present technical solution, an anti-oil spill cofferdam is installed inside the outer tank, and the anti-oil spill cofferdam is used for oil spill recovery.

[0014] The beneficial effect of adopting the above further solution is that, when an oil spill accident occurs, the oil spill prevention cofferdam can quickly collect the spilled oil, preventing the oil leakage from causing environmental pollution and safety accidents.

[0015] As a further improvement of the present technical solution, mounting seats are symmetrically mounted on the upper outer wall of the outer tank.

[0016] The beneficial effect of adopting the above further solution is that the mounting base provides convenient conditions for the installation and maintenance of the oil storage tank, and is convenient for operations such as lifting and maintenance.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. Suitable for unmanned or undermanned offshore platforms with a high degree of automation;

[0019] 2. The oil storage tank body with a double-layer structure can play a good role in explosion-proof and flame-retardant, corrosion-resistant and wear-resistant, greatly enhancing the explosion-proof and flame-retardant performance of the oil storage tank. Even if the inner tank leaks, the outer tank can play a certain barrier role, reducing the risk of explosion caused by contact between oil and external fire sources, and the oil is not easy to be contaminated after long-term use;

[0020] 3. The monitoring components between the inner and outer tanks (liquid level gauge, combustible gas detector, and temperature and smoke sensors) enhance the monitoring of oil leaks and work in conjunction with the alarm and fire extinguishing systems to detect safety hazards such as combustible gas leaks, abnormal temperature rise, and abnormal liquid level changes in advance, providing timely warnings and implementing measures to effectively prevent accidents.

[0021] 4. The fire protection system of the oil storage tank is mainly a fully automatic intelligent fire protection system, and also has a manual control mode for local and remote control, integrating automatic fire detection, early alarm, fire extinguishing and fire situation feedback functions;

[0022] 5. There is an anti-oil spill cofferdam and a simple oil spill recovery device inside the outer tank to facilitate oil spill recovery;

[0023] 6. The outer tank is equipped with ventilation components such as ventilation dampers and fans, which can be automatically or remotely started and stopped under non-fire conditions, reducing heat accumulation in the box and the possibility of explosion caused by accumulation of combustible gases due to high-temperature volatilization of oil. At the same time, the ventilation valve can also prevent external fire sources from entering, further improving safety to achieve the purpose of avoiding fire. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a schematic cross-sectional view of the overall structure of the present invention;

[0026] Figure 3 It is a schematic plan view of the overall structure of the present invention.

[0027] The meaning of each number in the figure is:

[0028] 600, mounting bracket; 100, oil storage tank body; 101, outer tank; 102, inner tank; 1020, cavity; 200, monitoring component; 201, combustible gas detector; 202, temperature and smoke probe; 203, liquid level gauge; 300, ventilation component; 301, fan; 302, ventilation valve; 1010, oil spill prevention cofferdam; 1021, base; 1011, thermometer; 1012, pressure gauge; 1013, mounting base. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0030] See also Figure 1-Figure 3 As shown, this embodiment provides a double-layer barrier explosion-proof oil storage tank, including a mounting bracket 600. Considering that during the actual use of conventional oil storage tanks on offshore oil and gas platforms, the oil storage tank body 100 may have potential fire and explosion risks, but offshore platforms are usually unmanned or have few people on duty, the platform electrical equipment is concentrated, and the degree of automation is high. In emergency situations, such as equipment failure, fire or explosion in the early stage, manual intervention cannot be carried out immediately, delaying the best time to deal with it. Therefore, the details are as follows: the oil storage tank body 100 is installed above the mounting bracket 600, and the oil storage tank body 100 is configured as a double-layer structure, wherein:

[0031] The double-layer structure of the oil storage tank body 100 improves its explosion-proof, flame-retardant, corrosion-resistant and wear-resistant properties.

[0032] The improvement of this embodiment is that:

[0033] The oil storage tank body 100 with a double-layer structure can play a better role in explosion-proof, flame-retardant, corrosion-resistant and wear-resistant, and the oil is not easily contaminated after long-term use.

[0034] First, in order to improve the monitoring of oil leakage, the oil storage tank body 100 includes an outer tank 101 and an inner tank 102. A base 1021 is installed at the bottom end of the inner tank 102, and the base 1021 is welded and fixed to the bottom of the outer tank 101. A cavity 1020 is formed between the inner wall of the outer tank 101 and the outer wall of the inner tank 102, and a monitoring component 200 is installed inside the cavity 1020. The monitoring component 200 includes a combustible gas detector 201 and a temperature and smoke probe 202. One end of the combustible gas detector 201 and the temperature and smoke probe 202 is set in the external space. The monitoring component 200 also includes a liquid level gauge 203, which is used to monitor the changes in the liquid level inside the oil storage tank body 100. A thermometer 1011 and a pressure gauge 1012 are installed on the outer wall of the outer tank 101;

[0035] The outer tank 101 plays an external protection and support role. Its material usually has a certain strength and corrosion resistance, can withstand the influence of the external environment, and protect the inner tank 102 and the oil. The thermometer 1011 and the pressure gauge 1012 installed on the outer wall of the outer tank 101 can monitor the temperature of the environment in which the outer tank 101 is located and the internal pressure in real time, so as to detect abnormalities in time; the inner tank 102 is in direct contact with the oil and stores the main part of the oil. Its double-layer structure design can enhance the strength and stability of the storage tank, and in special circumstances such as leakage, the inner tank 102 can serve as the first line of defense to reduce the risk of oil leakage; the base 1021 installed at the bottom of the inner tank 102 is welded and fixed to the bottom of the outer tank 101 to ensure that the inner tank 102 is installed firmly and stably to avoid shaking during operation.

[0036] It is installed in the cavity 1020 between the inner wall of the outer tank 101 and the outer wall of the inner tank 102, and is used to monitor in real time whether there is combustible gas, abnormal temperature increase, and smoke in the cavity 1020. The end is placed in the external space to facilitate wiring connection and signal transmission, so as to facilitate timely monitoring of possible safety hazards, such as oil leakage causing the concentration of combustible gas in the cavity 1020 to exceed the standard; the liquid level meter 203 is mainly used to monitor the changes in the liquid level inside the oil storage tank body 100. By monitoring the liquid level changes, the oil reserves in the oil storage tank can be accurately grasped, which facilitates the filling and extraction of oil, and can also help to determine whether there are abnormal oil leakage and other problems to a certain extent.

[0037] Secondly, considering that the oil tank body 100 may accumulate heat during long-term use, a ventilation assembly 300 is installed on the outer wall of the outer tank 101 to reduce heat accumulation inside the oil tank body 100. The ventilation assembly 300 includes a fan 301 and a ventilation valve 302, which are connected by an air duct.

[0038] When the fan 301 is running, it generates airflow, which can discharge the air inside the oil storage tank body 100 through the air duct and the ventilation valve 302, thereby playing the role of ventilation, reducing internal heat accumulation, and reducing the risk of increased oil volatilization and increased safety hazards caused by heat accumulation; the ventilation valve 302 cooperates with the fan 301 to automatically open or close according to the pressure difference between the inside and outside of the tank, adjust the air pressure in the tank, ensure that the air pressure in the tank is within a reasonable range, and at the same time prevent external fire sources from entering the tank through the ventilation port and causing accidents.

[0039] In addition, an anti-oil spill cofferdam 1010 is installed inside the outer tank 101. The anti-oil spill cofferdam 1010 is used for oil spill recovery. When oil overflows from the inner tank 102, the anti-oil spill cofferdam 1010 can temporarily collect the spilled oil to prevent the oil from flowing directly into the external environment and causing pollution and safety risks, thereby buying time for subsequent oil spill recovery and processing.

[0040] In addition, a mounting base 1013 is symmetrically installed on the outer wall above the outer tank 101, which can be used to install some related equipment, pipeline accessories, etc., facilitating the installation of electrostatic grounding devices, additional monitoring equipment or small safety protection devices, thereby expanding the functional expansion capabilities of the oil storage tank.

[0041] In actual use, the double-layer barrier explosion-proof oil storage tank of the present invention is constructed after the inner tank 102 and outer tank 101 are constructed separately. Before the outer tank 101 is capped, the inner tank 102 is hoisted into the interior of the outer tank 101 using a truck crane. After positioning and leveling, the base 1021 of the inner tank 102 is welded to the bottom of the outer tank 101. The roof of the outer tank 101 is then installed. Instruments such as the level gauge 203, pressure gauge 1012, thermometer 1011, combustible gas detector 201, and temperature and smoke detectors 202 are then installed and wired. The fan 301, damper, and air duct are also installed and wired. Finally, relevant commissioning work is carried out.

[0042] The oil is transported to the inner tank 102 of the double-barrier explosion-proof oil storage tank through the oil pipeline for storage. During the oil injection process, the mounting bracket 600 ensures the stability of the oil storage tank, and the liquid level meter 203 monitors the liquid level changes in real time to prevent the oil from overflowing the inner tank 102. At the same time, the fan 301 starts to operate according to the set timing or according to the temperature in the tank, and discharges the air in the tank through the ventilation valve 302 through the air duct to reduce internal heat accumulation and maintain a suitable air pressure and temperature environment in the tank. If there is a slight leakage of oil, the leaked oil in the inner tank 102 will first enter the cavity 1020 between the inner wall of the outer tank 101 and the outer wall of the inner tank 102. At this time, the monitoring components 200 such as the combustible gas detector 201, temperature sensor, and smoke sensor 202 in the cavity 1020 will promptly sense the abnormality and issue an early warning signal. Staff regularly check the external ambient temperature of the oil storage tank and the pressure inside the tank using the thermometer 1011 and pressure gauge 1012 installed on the outer wall of the outer tank 101 to ensure that they are within the normal range. At the same time, they pay close attention to the data information fed back by the monitoring component 200, including the concentration of combustible gas, temperature, smoke conditions, and liquid level changes. Once the data is found to be outside the normal range, it is promptly inspected and processed to determine whether there is an oil leak or other safety hazards. If the liquid level is insufficient and the oil needs to be canned, under the premise that the ventilation component 300 operates normally to ensure safety, the oil is slowly injected into the inner tank 102 through the relevant pipelines and operating equipment, and various parameters are closely monitored during the injection process. When the monitoring component 200 detects that the concentration of combustible gas exceeds the standard, the temperature rises abnormally, or smoke appears, the emergency plan is immediately activated, and the fully automatic intelligent fire protection system is used to realize automatic fire detection, pre-alarm, fire extinguishing, and fire feedback. At the same time, the anti-oil spill cofferdam 1010 is used to collect oil that may overflow to prevent the leakage from spreading.

[0043] It is important to note that the inner tank 102 is designed and constructed in accordance with conventional oil storage tanks for offshore oil and gas platforms. Its net volume, dimensions, design pressure, and design temperature must meet the requirements of the design documents. It must be suitable for marine environments and obtain a ship inspection certificate. Its design life is 30 years. The materials of the tank body, internals, pipes / fittings, flanges, and forgings must meet the requirements of the data sheet. All electrical and instrumentation equipment on the skid must meet the IP56 protection level. If explosion-proof equipment is included, a CCC certificate must be provided in accordance with CNCA-C23-01. A water seepage test will be conducted after completion. The outer tank 101 is designed and constructed in accordance with conventional oil storage tanks for offshore oil and gas platforms. Its exterior is sprayed with a fire-retardant and wear-resistant coating. Its net volume, dimensions, design pressure, and design temperature must meet the requirements of the design documents. Its design life is 30 years. All electrical and instrumentation equipment must meet the IP56 protection level. If explosion-proof equipment is included, a CCC certificate must be provided in accordance with CNCA-C23-01.

[0044] Further explanation: When using a fixed HFC-227ea fire extinguishing method, if the leaked oil encounters an open flame to form a blazing fire or flash fire, the oil storage tank should be protected from the fire, to avoid the oil storage tank from exploding due to heat, and to be able to handle the remaining burning oil that has spread; the oil storage tank and pipeline should have devices to handle oil overflow under abnormal circumstances, and the indoor lighting, switches and other components should meet the fire and explosion protection requirements.

[0045] It will be apparent to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above, and that the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present application is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0046] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A double-layer barrier explosion-proof oil storage tank, comprising a mounting bracket (600), characterized in that: An oil storage tank body (100) is installed above the mounting bracket (600), and the oil storage tank body (100) is configured as a double-layer structure, wherein: The double-layer structure of the oil storage tank body (100) improves its explosion-proof, flame-retardant, corrosion-resistant and wear-resistant functions.

2. The double-layer barrier explosion-proof oil storage tank according to claim 1 is characterized in that: The oil storage tank body (100) comprises an outer tank (101) and an inner tank (102); a cavity (1020) is formed between the inner wall of the outer tank (101) and the outer wall of the inner tank (102); and a monitoring component (200) is installed inside the cavity (1020).

3. The double-layer barrier explosion-proof oil storage tank according to claim 2 is characterized in that: The monitoring assembly (200) comprises a combustible gas detector (201) and a temperature and smoke detector (202), wherein one end of the combustible gas detector (201) and the temperature and smoke detector (202) is arranged in an external space.

4. The double-layer barrier explosion-proof oil storage tank according to claim 2 is characterized in that: The monitoring component (200) further comprises a liquid level meter (203), and the liquid level meter (203) is used to monitor changes in the liquid level inside the oil storage tank body (100).

5. The double-layer barrier explosion-proof oil storage tank according to claim 2 is characterized in that: A ventilation assembly (300) is installed on the outer wall of the outer tank (101), and the ventilation assembly (300) is used to reduce heat accumulation inside the oil storage tank body (100).

6. The double-layer barrier explosion-proof oil storage tank according to claim 5 is characterized in that: The ventilation assembly (300) comprises a fan (301) and a ventilation valve (302), and the fan (301) and the ventilation valve (302) are connected via an air duct.

7. The double-layer barrier explosion-proof oil storage tank according to claim 2 is characterized in that: An anti-oil spill cofferdam (1010) is installed inside the outer tank (101), and the anti-oil spill cofferdam (1010) is used for oil spill recovery.

8. The double-layer barrier explosion-proof oil storage tank according to claim 2 is characterized in that: A base (1021) is installed at the bottom end of the inner tank (102), and the base (1021) is welded and fixed to the bottom of the outer tank (101).

9. The double-layer barrier explosion-proof oil storage tank according to claim 2, characterized in that: A thermometer (1011) and a pressure gauge (1012) are installed on the outer wall of the outer tank (101).

10. The double-layer barrier explosion-proof oil storage tank according to claim 2, characterized in that: A mounting seat (1013) is symmetrically mounted on the upper outer wall of the outer tank (101).

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