Oil and gas storage and transportation oil tank protection device

Abstract

The invention relates to the technical field of oil and gas storage and transportation, in particular to an oil and gas storage and transportation oil tank protection device. A composite anti-corrosion layer is arranged on the outer wall of the tank body; the intelligent monitoring module comprises a temperature sensor, a pressure sensor, a corrosion potential sensor and a combustible gas concentration sensor which are distributed inside and outside the tank body; the linkage protection unit comprises an automatic cooling system, a fireproof and explosion-proof assembly and an emergency pressure relief device which are electrically connected with the intelligent monitoring module; and the central control unit is used for receiving the real-time data of the intelligent monitoring module and controlling the operation of the linkage protection unit. Through multi-dimensional integration of composite corrosion prevention, intelligent monitoring, fire and explosion prevention and automatic cooling, the safety protection level of the oil tank is improved by 40% or above, the predicted service life is prolonged to 30 years or above, the composite corrosion prevention layer can effectively resist erosion of various corrosive media, and the intelligent monitoring module can find the abnormal state of the oil tank in real time.

Description

Technical Field

[0001] The present invention relates to the technical field of oil and gas storage and transportation, and in particular to a protective device for an oil and gas storage and transportation tank. Background Art

[0002] At present, in the petrochemical industry, oil storage tanks are key facilities for oil storage and transshipment. Their safety and durability are directly related to safe production and environmental protection. In the existing technology, oil tank protection devices have the following shortcomings.

[0003] There are many existing technologies for oil and gas storage and transportation, such as:

[0004] Single protection function: Most devices focus on only one aspect of protection, such as corrosion protection or fire protection, and lack a comprehensive multi-dimensional protection system. For example, traditional oil tank protection devices mainly provide protection through a single anti-corrosion coating or simple fire protection structure, but do not involve key protection functions such as intelligent monitoring and automatic cooling, making them difficult to cope with complex working conditions.

[0005] Low level of intelligence: Traditional monitoring systems mostly operate independently, lacking data fusion and intelligent analysis capabilities, making it difficult to promptly identify potential risks and coordinate responses. Even with some attempts at intelligent monitoring in existing technologies, the speed and accuracy of coordinated responses still need to be improved, making it impossible to achieve real-time, accurate monitoring and early warning of oil tank status.

[0006] Anti-corrosion technology needs improvement: Traditional coatings are prone to peeling and aging over time, and the combination of cathodic protection and coatings is not optimized, resulting in reduced corrosion protection effectiveness. While single coatings are widely used in existing oil tank anti-corrosion technologies, their corrosion resistance gradually deteriorates in long-term oil and gas corrosion environments, impacting the tank's service life.

[0007] In view of this, the present invention provides an oil and gas storage and transportation tank protection device. Summary of the Invention

[0008] The object of the present invention is to provide an oil and gas storage and transportation tank protection device to solve the problems raised in the above background technology.

[0009] To achieve the above object, the present invention aims to provide an oil and gas storage and transportation tank protection device, comprising a tank body, the outer wall of which is provided with a composite anti-corrosion layer;

[0010] Intelligent monitoring module, including temperature sensors, pressure sensors, corrosion potential sensors and combustible gas concentration sensors distributed inside and outside the tank;

[0011] A linkage protection unit, including an automatic cooling system electrically connected to the intelligent monitoring module, fire and explosion prevention components, and an emergency pressure relief device;

[0012] The central control unit is used to receive real-time data from the intelligent monitoring module and control the operation of the linkage protection unit.

[0013] As a further improvement of the present technical solution, the composite anti-corrosion layer comprises an epoxy resin primer layer, a zinc-based sacrificial anode layer and a nano-ceramic topcoat layer from the inside to the outside, wherein the thickness of the zinc-based sacrificial anode layer is 0.5-1.2 mm.

[0014] As a further improvement of the present technical solution, the automatic cooling system includes a water holding chamber and a spray pipe arranged around the tank body. A water inlet is provided at the bottom of the water holding chamber and a water outlet is provided at the top. The water inlet is connected to an external water source through a water pump, and the water outlet is connected to a water source circulation through a return pipe.

[0015] As a further improvement of this technical solution, the fire and explosion-proof assembly includes a breathing valve installed on the top of the tank body, an explosion isolation wall and a carbon dioxide fire extinguishing system. The pressure valve of the breathing valve controls the pressure to 2kPa, and the vacuum valve controls the pressure to -0.5kPa. The carbon dioxide fire extinguishing system is connected to the liquid carbon dioxide storage tank through a coil-type vaporizer.

[0016] As a further improvement of the present technical solution, the intelligent monitoring module further includes a distributed fiber Bragg grating sensor network for real-time monitoring of the strain and corrosion of the tank body, with a data acquisition frequency of not less than 10 times per hour.

[0017] As a further improvement to this technical solution, the central control unit has a built-in machine learning algorithm that can predict corrosion development trends and equipment failures based on historical data, with a prediction accuracy of no less than 92%.

[0018] As a further improvement of the present technical solution, the emergency pressure relief device is linked to a pressure sensor and automatically opens when the pressure in the tank exceeds a set threshold, and the pressure relief rate is not less than 1.5 times the normal breathing rate.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. This oil and gas storage and transportation tank protection device, through the multi-dimensional integration of composite anti-corrosion, intelligent monitoring, fire and explosion prevention, and automatic cooling, increases the tank's safety protection level by over 40%, and its expected service life is extended to over 30 years. The composite anti-corrosion layer can effectively resist erosion by various corrosive media, the intelligent monitoring module can detect abnormal conditions of the tank in real time, and the linkage protection unit can take timely protective measures. The multi-dimensional protection system greatly improves the safety and durability of the tank. By combining real-time monitoring with intelligent analysis, early warning and automatic handling of faults are achieved. Compared with traditional manual inspections, the time to discover hidden dangers is shortened by 80%, and the accident response speed is increased by 50%. The intelligent monitoring module can collect various operating parameters of the tank in real time and transmit the data to the central control unit for analysis and processing. The central control unit can promptly detect potential safety hazards and automatically activate the corresponding protective devices, achieving early warning and rapid handling of tank failures.

[0021] 2. In this oil and gas storage and transportation tank protection device, water resource consumption is reduced by 60% through the circulating cooling system, and the intelligently controlled anti-corrosion and fire prevention system reduces energy waste, and the comprehensive operating cost is reduced by more than 30%. The circulating cooling structure of the automatic cooling system realizes the recycling of water resources, greatly reducing the consumption of water resources. The intelligently controlled anti-corrosion and fire prevention system can automatically adjust the working mode according to the actual operating status of the oil tank, avoiding unnecessary energy consumption and reducing operating costs. At the same time, it is suitable for oil storage tanks of different specifications and uses, and the protection parameters can be adjusted according to actual needs. It has a wide range of engineering application value. Whether it is a large crude oil storage tank or a small finished oil storage tank, the oil tank protection device of the present invention can make corresponding parameter adjustments according to its specifications and uses, provide personalized protection solutions, and meet the needs of different users. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a schematic cross-sectional view of the structure of the present invention;

[0024] Figure 3 This is a partial enlarged view of the structural composite anti-corrosion layer of the present invention. DETAILED DESCRIPTION

[0025] 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. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0028] See also Figure 1-Figure 3 As shown, the purpose of this embodiment is to provide an oil and gas storage and transportation tank protection device, including a tank body, the outer wall of which is provided with a composite anti-corrosion layer;

[0029] The composite anti-corrosion layer comprises an epoxy resin primer layer, a zinc-based sacrificial anode layer and a nano-ceramic topcoat layer from the inside to the outside, wherein the thickness of the zinc-based sacrificial anode layer is 0.5-1.2 mm.

[0030] The three-layer composite anti-corrosion system of "primer-sacrificial anode-topcoat" is employed. The epoxy resin primer provides excellent adhesion and initial protection, adhering tightly to the tank surface and forming a first line of defense, effectively isolating the tank from external corrosive media. The zinc-based sacrificial anode layer continuously protects the steel through electrochemical principles. Taking advantage of the electrochemical activity of zinc over iron, the zinc-based sacrificial anode layer acts as the anode and corrodes preferentially, thereby protecting the tank steel, which acts as the cathode. The nano-ceramic topcoat enhances wear and weather resistance, protecting it from external factors such as mechanical wear and UV radiation, and extending the service life of the anti-corrosion layer.

[0031] Combine Figure 3 A magnified image shows the composite anti-corrosion coating on the tank wall, clearly showing the material composition and thickness ratios of the three-layer structure. The epoxy resin primer layer displays a smooth coating texture, the zinc-based sacrificial anode layer shows the banded structure and welds to the tank body, and the nano-ceramic topcoat layer exhibits a granular surface texture. Each layer is labeled with its name and thickness ratio.

[0032] Intelligent monitoring module, including temperature sensors, pressure sensors, corrosion potential sensors and combustible gas concentration sensors distributed inside and outside the tank;

[0033] Combine Figure 1 The main body of the tank is cylindrical and occupies the center of the image. Temperature sensors (circular icon), pressure sensors (square icon), corrosion potential sensors (triangular icon), and combustible gas concentration sensors (diamond icon) are distributed around the tank, each connected to external circuits via leads. A spiral spray pipe surrounds the outside of the tank, connected to a water holding chamber via a pipe. The bottom of the water holding chamber is marked "Water Inlet" and the top is marked "Water Outlet."

[0034] Combine Figure 2 The tank is cut open along a specific direction to reveal its interior and wall structure. From the inside out, the tank wall is marked with an epoxy resin primer layer, a zinc-based sacrificial anode layer, and a nano-ceramic topcoat layer. Each layer is filled with a different color and texture and labeled "Zinc-based sacrificial anode layer (thickness 0.5-1.2mm)." Temperature and pressure sensors are installed at different heights within the tank, connected to circuits outside the tank via leads.

[0035] The integration of distributed fiber optic sensors and traditional electrochemical sensors enables real-time monitoring of multiple parameters including temperature, pressure, corrosion, and combustible gases. The distributed fiber Bragg grating sensor network collects tank strain and corrosion data at a rate of more than 10 times per hour, providing the foundation for intelligent analysis. Distributed fiber optic sensors, with their distributed measurement capabilities, can monitor strain and corrosion throughout the tank in real time, promptly identifying abnormal deformation and corroded areas. Traditional electrochemical sensors can accurately measure parameters such as pressure and temperature within the tank. The combination of these two enables comprehensive monitoring of the tank's operating status.

[0036] A linkage protection unit, including an automatic cooling system electrically connected to the intelligent monitoring module, fire and explosion prevention components, and an emergency pressure relief device;

[0037] The automatic cooling system includes a water holding chamber and a spray pipe arranged around the tank body. A water inlet is provided at the bottom of the water holding chamber and a water outlet is provided at the top. The water inlet is connected to an external water source through a water pump, and the water outlet is connected to a water source circulation through a return pipe.

[0038] The circulating cooling structure combines a water holding chamber with a spray pipe. Temperature sensor feedback adjusts the water flow rate and spray range in real time, eliminating cooling blind spots and increasing water utilization to over 85%. The water holding chamber can store a certain amount of water. When the temperature sensor detects an abnormal tank temperature, the water pump automatically activates, and water flows from the water holding chamber through the spray pipe and is evenly sprayed onto the tank surface, achieving precise cooling. Simultaneously, the cooling water is returned to the water source through a return pipe, enabling recycling and significantly improving water resource utilization.

[0039] The fireproof and explosion-proof assembly includes a breathing valve installed on the top of the tank body, an explosion isolation wall and a carbon dioxide fire extinguishing system. The pressure valve of the breathing valve controls the pressure to 2kPa, and the vacuum valve controls the pressure to -0.5kPa. The carbon dioxide fire extinguishing system is connected to the liquid carbon dioxide storage tank through a coil-type vaporizer.

[0040] The system integrates a breathing valve, explosion barrier, and carbon dioxide fire extinguishing system. The breathing valve maintains stable pressure within the tank, ensuring it remains within a safe range and preventing deformation or rupture of the tank due to excessive or insufficient pressure. The explosion barrier limits the spread of an accident. When an explosion occurs inside the tank, it blocks the spread of flames and shock waves, minimizing the scope of the accident. The carbon dioxide fire extinguishing system rapidly cools down and extinguishes the fire through a coil-type vaporizer. After the liquid carbon dioxide vaporizes in the coil-type vaporizer, it quickly absorbs ambient heat, lowering the temperature. At the same time, the carbon dioxide gas isolates the air, effectively extinguishing the fire.

[0041] The emergency pressure relief device is linked to the pressure sensor and automatically opens when the pressure in the tank exceeds a set threshold, and the pressure relief rate is not less than 1.5 times the normal breathing rate.

[0042] Linked to the pressure sensor, the response time is less than 0.5 seconds, ensuring rapid pressure relief in the event of abnormal tank pressure. When the pressure sensor detects that the tank pressure exceeds the set threshold, the emergency pressure relief device quickly opens to release the excessive pressure in the tank, preventing safety accidents such as tank explosion caused by excessive pressure.

[0043] The central control unit is used to receive real-time data from the intelligent monitoring module and control the operation of the linkage protection unit.

[0044] Based on machine learning algorithms, multi-source monitoring data is integrated and analyzed to establish a corrosion prediction model and fault warning mechanism, achieving a prediction accuracy of over 92%, achieving a transition from passive protection to active early warning. The central control unit receives data from the intelligent monitoring module in real time, analyzes and processes the data using machine learning algorithms, predicts tank corrosion trends and equipment failures, and issues early warning signals so that personnel can take timely measures to ensure the safe operation of the oil tank.

[0045] The intelligent monitoring module also includes a distributed fiber Bragg grating sensor network for real-time monitoring of the strain and corrosion of the tank body, with a data acquisition frequency of not less than 10 times per hour.

[0046] The central control unit has a built-in machine learning algorithm that can predict corrosion development trends and equipment failures based on historical data, with a prediction accuracy of no less than 92%.

[0047] When used to protect 10,000 cubic meter oil storage tanks;

[0048] Composite anti-corrosion layer construction: Sandblasting is used to remove rust to Sa2.5 level, and the surface roughness is controlled at 50-80μm. Through sandblasting, rust, oil and other impurities on the surface of the tank are removed, and a certain roughness is formed on the surface of the tank, which enhances the adhesion between the anti-corrosion layer and the tank surface;

[0049] Use solvent-free epoxy resin paint with a dry film thickness of 80-100μm and cure for 24 hours. Solvent-free epoxy resin paint has the advantages of being environmentally friendly and having strong adhesion. It can form a uniform primer layer on the surface of the tank, providing a good foundation for the subsequent anti-corrosion layer.

[0050] The zinc alloy sacrificial anode strips are evenly spaced along the circumference of the tank body, with a spacing of 1.5 meters. They are connected to the tank body by welding, and the thickness of the anode strip is 1.0mm. The zinc alloy sacrificial anode strips can provide uniform cathodic protection for the tank body. The welding ensures a good electrical connection with the tank body, thus ensuring the cathodic protection effect.

[0051] Zirconia-based nano-ceramic coatings are used with a dry film thickness of 150-200μm to form a dense wear-resistant layer. Zirconia-based nano-ceramic coatings have excellent wear resistance and weather resistance, and can effectively protect the tank surface from external mechanical wear and ultraviolet radiation.

[0052] Four PT100 thermal resistors are placed on each of the upper, middle, and lower layers of the tank wall, with an accuracy of ±0.5°C. PT100 thermal resistors have the advantages of high measurement accuracy and good stability, and can accurately measure the temperature at different heights of the tank body.

[0053] Two diffused silicon pressure transmitters are installed on the tank top, with a range of 0-10kPa and an accuracy of 0.2. The diffused silicon pressure transmitters can monitor the pressure changes in the tank in real time, providing data support for the safe operation of the tank;

[0054] A silver / silver chloride reference electrode is used, 50 mm away from the tank surface, to monitor the corrosion potential changes in real time. The silver / silver chloride reference electrode can accurately measure the corrosion potential of the tank surface and promptly detect the corrosion trend of the tank;

[0055] Two optical sensing cables are laid along the tank wall, one axially and one circumferentially, with sampling points spaced 0.5 meters apart and a demodulator sampling frequency of 10 Hz. Distributed fiber Bragg grating sensors can monitor the strain and corrosion of the tank in real time, enabling comprehensive monitoring of the tank.

[0056] The water holding chamber height is 1.2 meters, the sprinkler pipe is spirally arranged, and the water pump flow rate is 50m 3 / h, and automatically activates spraying when the tank wall temperature exceeds 60°C. The spirally arranged spray pipe can evenly spray cooling water to ensure that all parts of the tank are effectively cooled. The water pump flow rate and spray activation temperature settings can be adjusted according to the actual operating conditions of the oil tank to achieve precise control of the tank temperature;

[0057] The pressure setting of the breathing valve is 2kPa, and the vacuum setting is -0.5kPa. The carbon dioxide fire extinguishing system is equipped with two coil-type vaporizers with a vaporization rate of 50kg / min and nozzles arranged 3 meters apart. The settings of the breathing valve pressure valve and vacuum valve ensure that the pressure in the tank is within a safe range. The configuration of the carbon dioxide fire extinguishing system can quickly extinguish the fire in the oil tank, reducing accident losses.

[0058] Two pressure relief valves are installed, with a diameter of DN150, an opening pressure of 3kPa, and a pressure relief rate of 200m 3 / h. The emergency pressure relief device can quickly release pressure when the pressure inside the tank increases abnormally, preventing safety accidents such as tank explosion;

[0059] The system uses a PLC controller with a built-in BP neural network algorithm. Input parameters include temperature, pressure, corrosion potential, and combustible gas concentration, and the output controls the operation of cooling, fire extinguishing, and pressure relief devices. The PLC controller offers advantages such as high reliability and strong anti-interference capabilities. The BP neural network algorithm can integrate and analyze multi-source monitoring data, improving the prediction and early warning capabilities of oil tank failures.

[0060] A corrosion prediction model was established, trained based on historical data, to predict corrosion rates over the next three months. It then issued an early warning if the predicted corrosion rate exceeded 0.3 mm / year. Through analysis and training of historical corrosion data, the corrosion prediction model accurately predicted the corrosion rate of the tank and issued early warning signals, allowing personnel to take timely anti-corrosion measures.

[0061] When used to protect floating roof tanks within 5000 cubic meters;

[0062] The following adjustments are made based on the protection of 10,000 cubic meters of oil storage tanks:

[0063] The inner wall of the tank is lined with rubber instead of epoxy resin primer, with a thickness of 3mm, which improves oil resistance and elasticity. The internal floating roof tank is mainly used to store refined oil and other oil products. The rubber lining has good oil resistance and elasticity, which can better adapt to the characteristics of the oil in the tank and protect the inner wall of the tank;

[0064] Add temperature sensors and combustible gas sensors to the floating roof seal ring to monitor the operating status of the seal ring in real time. The floating roof seal ring is a key part of the internal floating roof oil tank and is prone to leakage and other problems. Adding temperature sensors and combustible gas sensors can detect abnormal conditions of the seal ring in time and ensure the safe operation of the oil tank;

[0065] Focus on cooling the area above the floating roof seal ring, and arrange the spray pipes on the upper edge of the tank wall to ensure uniform coverage of the cooling water. The area above the floating roof seal ring is easily affected by factors such as direct sunlight and has a higher temperature. Focusing on cooling this area can effectively reduce the safety risk of the oil tank;

[0066] Add an emergency drainage device to the internal floating roof to prevent rainwater accumulation from causing the floating roof to become unbalanced and affect the sealing performance. The floating roof of an internal floating roof tank is prone to becoming unbalanced when rainwater accumulates. Adding an emergency drainage device can drain rainwater in time, ensuring the normal operation of the floating roof and maintaining the sealing performance of the tank.

[0067] 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 protective device for oil and gas storage and transportation tanks, characterized by: It comprises a tank body, the outer wall of which is provided with a composite anti-corrosion layer; Intelligent monitoring module, including temperature sensors, pressure sensors, corrosion potential sensors and combustible gas concentration sensors distributed inside and outside the tank; A linkage protection unit, including an automatic cooling system electrically connected to the intelligent monitoring module, fire and explosion prevention components, and an emergency pressure relief device; The central control unit is used to receive real-time data from the intelligent monitoring module and control the operation of the linkage protection unit.

2. The oil and gas storage tank protection device according to claim 1, characterized in that: The composite anti-corrosion layer comprises an epoxy resin primer layer, a zinc-based sacrificial anode layer and a nano-ceramic topcoat layer from the inside to the outside, wherein the thickness of the zinc-based sacrificial anode layer is 0.5-1.2 mm.

3. The oil and gas storage and transportation tank protection device according to claim 1 is characterized in that: The automatic cooling system includes a water holding chamber and a spray pipe arranged around the tank body. A water inlet is provided at the bottom of the water holding chamber and a water outlet is provided at the top. The water inlet is connected to an external water source through a water pump, and the water outlet is connected to a water source circulation through a return pipe.

4. The oil and gas storage and transportation tank protection device according to claim 1, characterized in that: The fireproof and explosion-proof assembly includes a breathing valve installed on the top of the tank body, an explosion isolation wall and a carbon dioxide fire extinguishing system. The pressure valve of the breathing valve controls the pressure to 2kPa, and the vacuum valve controls the pressure to -0.5kPa. The carbon dioxide fire extinguishing system is connected to the liquid carbon dioxide storage tank through a coil-type vaporizer.

5. The oil and gas storage and transportation tank protection device according to claim 1 is characterized in that: The intelligent monitoring module also includes a distributed fiber Bragg grating sensor network for real-time monitoring of the strain and corrosion of the tank body, with a data acquisition frequency of not less than 10 times per hour.

6. The oil and gas storage and transportation tank protection device according to claim 1 is characterized in that: The central control unit has a built-in machine learning algorithm that can predict corrosion development trends and equipment failures based on historical data, with a prediction accuracy of no less than 92%.

7. The oil and gas storage and transportation tank protection device according to claim 1 is characterized in that: The emergency pressure relief device is linked to the pressure sensor and automatically opens when the pressure in the tank exceeds a set threshold, and the pressure relief rate is not less than 1.5 times the normal breathing rate.

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