Pressure control device for nitrogen sealing of storage tank

Abstract

The utility model relates to the technical field of nitrogen sealing of storage tanks, in particular to a pressure control device for nitrogen sealing of storage tanks, which comprises a storage tank body and an auxiliary mechanism, the auxiliary mechanism is positioned at one end inside the storage tank body, and a bottom plate and an inner wall of the storage tank body are subjected to preservative treatment. Through liquid immersion type sealing in the floating disc sealing structure, the risk that materials in the tank volatilize is greatly reduced, combustible and harmful gas escapes is reduced, fire explosion hidden dangers and pollution hazards to the environment are reduced from the source, meanwhile, impurities such as external air and moisture can be prevented from entering the tank through efficient sealing, and the service life of the tank is prolonged. Stable quality of the stored medium is guaranteed, and potential safety problems caused by medium deterioration are avoided; and through the combination of a copper grounding electrode and an anti-static rubber grip of the static electricity elimination structure, it is ensured that static electricity can be conducted and eliminated in time in the storage tank operation process of an operator, the static electricity discharge accident caused by static electricity accumulation is effectively avoided, and the safety and stability of the device are improved.

Description

Technical Field

[0001] This utility model relates to the field of nitrogen sealing technology for storage tanks, specifically a pressure control device for nitrogen sealing of storage tanks. Background Technology

[0002] Internal floating roof storage tanks storing volatile materials require nitrogen sealing protection to reduce material volatilization while providing inert gas protection and improving tank safety. Traditional self-operated nitrogen sealing valves are purely mechanical, using internal springs and other elastic components to achieve pressure balance before and after the valve. The pressure in the tank is controlled by adjusting the spring's extension and retraction, enabling automatic nitrogen replenishment. However, nitrogen sealing valves used for extended periods can experience problems such as aging and jamming of the elastic components and diaphragm leakage. Furthermore, mechanical valves generally have poor control accuracy. Domestically produced self-operated regulating valves are inexpensive, but suffer from poor control accuracy and stability, requiring periodic adjustments. Imported self-operated regulating valves are expensive, but even they can experience decreased accuracy over time, necessitating regular maintenance. Therefore, there is an urgent need to develop a pressure control device for nitrogen sealing in storage tanks. Utility Model Content

[0003] The purpose of this invention is to provide a pressure control device for nitrogen sealing of storage tanks, so as to solve the problem of improving the safety of storage tanks mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A pressure control device for nitrogen sealing of storage tanks includes a storage tank body and an auxiliary mechanism. The auxiliary mechanism is located at one end inside the storage tank body. The bottom plate and inner wall of the storage tank body are treated with anti-corrosion measures.

[0006] The auxiliary mechanism includes a floating roof, an inner cavity, and a sealing strip. The inner cavity is provided inside the tank body. A floating roof is installed at the top of the inner wall of the inner cavity. A sealing strip is fixedly installed on one side of the floating roof. The floating roof and the inner cavity adopt an immersion sealing structure, and the sealing strip is tightly attached to the inner wall of the inner cavity. The immersion sealing method between the floating roof and the tank wall is required to enhance the sealing performance of the tank.

[0007] Preferably, the top of the storage tank body is provided with a feed inlet, a pipe port one is fixedly connected above the feed inlet, a pipe port two is fixedly connected to one end of the storage tank body, an environmentally friendly breather valve is fixedly installed above the pipe port two, and a pipe port three is fixedly connected to the other end of the storage tank body, a tuning fork switch is fixedly installed above the pipe port three. By replacing the traditional breather valve with a high-efficiency and environmentally friendly breather valve, the emission of volatile organic compounds is reduced, and by installing the tuning fork switch, the accuracy of liquid level monitoring is ensured.

[0008] Preferably, a foam tube is connected to one end of the storage tank body, and a foaming tube is fixedly connected inside the foam tube. Foaming holes are evenly opened on the inner side of the foaming tube. According to the "Technical Standard for Foam Fire Extinguishing Systems" 3.6.1, the storage tank must use a vertical foam generator to ensure the effectiveness of the fire extinguishing system.

[0009] Preferably, a sampling port is provided on one side of the top of the storage tank body, and static electricity elimination devices are fixedly installed on both sides of the sampling port. According to the "Petroleum Depot Design Code" 14.3.3, static electricity elimination devices should be installed 1.5m on both sides of the sampling port of the storage tank and electrically connected to the tank body to ensure operational safety.

[0010] Preferably, an anti-slip steel grating is fixedly installed on the top of the tank body, and a railing is fixedly and vertically installed on the outer end of the anti-slip steel grating. A high-level observation manhole is provided on one side of the sampling port of the tank body. By adding an inspection and maintenance platform on the top of the tank, daily maintenance and repair are facilitated. The addition of a high-level observation manhole also facilitates observation of the internal condition of the tank.

[0011] Preferably, a pressure transmitter is fixedly installed on the top of the tank body on the side away from the high-level observation manhole, and a metering-grade radar level gauge and waveguide are fixedly installed on one end of the outer wall of the tank body. The addition of a pressure transmitter on the top of the tank allows for real-time monitoring of the pressure inside the tank, and the addition of a metering-grade radar level gauge and waveguide to the tank improves the metering accuracy.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This pressure control device for nitrogen sealing of storage tanks significantly reduces the risk of material volatilization and the escape of flammable and harmful gases through the liquid immersion seal in the floating roof sealing structure. This reduces the risk of fire and explosion and environmental pollution from the source. At the same time, the efficient seal also prevents impurities such as external air and moisture from entering the tank, ensuring the stability of the stored medium quality and avoiding potential safety problems caused by medium deterioration. Furthermore, the electrostatic elimination structure, through the combination of a copper grounding electrode and an anti-static rubber handle, ensures that static electricity can be promptly discharged by operators during tank operations, effectively avoiding electrostatic discharge accidents caused by static electricity accumulation and improving the safety and stability of the device. This pressure control device for nitrogen sealing of storage tanks replaces the breather valve structure with a high-efficiency and environmentally friendly type. With its precise pressure sensing and regulation mechanism, it significantly reduces VOC emissions while ensuring normal breathing of the storage tank. Without passing through the diffuser at the inlet, the material can enter the storage tank evenly and stably, reducing energy loss and splashing caused by material impact, thereby reducing material volatilization and achieving the dual benefits of energy saving and environmental protection. The storage tank body and auxiliary structures are treated with anti-corrosion measures in many places to reduce wear and extend the service life of the storage tank and improve the practicality of the device. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a frontal cross-sectional view of the present invention.

[0016] Figure 3 This is a schematic diagram of the overall structure at the top of the storage tank body of this utility model;

[0017] Figure 4 This is a top view schematic diagram of the storage tank body of this utility model. In the figure: 1. Storage tank body; 2. Auxiliary mechanism; 201. Floating plate; 202. Inner cavity; 203. Sealing strip; 3. Feed inlet; 4. Pipe port one; 5. Dispersing pipe; 6. Pipe port two; 7. Environmentally friendly breather valve; 8. Pipe port three; 9. Tuning fork switch; 10. Foam pipe; 11. Foaming pipe; 12. Foaming hole; 13. Sampling port; 14. Device for eliminating static electricity in the human body; 15. Anti-slip steel grating; 16. Railing; 17. High-level observation manhole; 18. Pressure transmitter; 19. Metering-grade radar level gauge and waveguide. Detailed Implementation

[0018] 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.

[0019] Please see Figures 1-4 As shown, this utility model provides a technical solution:

[0020] A pressure control device for nitrogen sealing of storage tanks includes a storage tank body 1 and an auxiliary mechanism 2. The auxiliary mechanism 2 is located at one end inside the storage tank body 1. The bottom plate and inner wall of the storage tank body 1 are treated with anti-corrosion measures.

[0021] The auxiliary mechanism 2 includes a floating roof 201, an inner cavity 202, and a sealing strip 203. The inner cavity 202 is provided inside the storage tank body 1. The floating roof 201 is installed at the top of the inner wall of the inner cavity 202. The sealing strip 203 is fixedly installed on one side of the floating roof 201. The floating roof 201 and the inner cavity 202 adopt a liquid immersion sealing structure, and the sealing strip 203 is tightly attached to the inner wall of the inner cavity 202. Through the liquid immersion sealing in the sealing structure of the floating roof 201, the risk of material volatilization in the tank is greatly reduced, the escape of flammable and harmful gases is reduced, and the risk of fire and explosion and environmental pollution is reduced from the source. At the same time, the efficient sealing can also prevent impurities such as external air and moisture from entering the tank, ensuring the stability of the quality of the stored medium and avoiding potential safety problems caused by medium deterioration.

[0022] In this embodiment, preferably, a feed inlet 3 is provided at the top of the tank body 1, a pipe port 4 is fixedly connected above the feed inlet 3, a dispersing pipe 5 is connected to the bottom of the feed inlet 3, a pipe port 6 is fixedly connected to one end of the tank body 1, an environmentally friendly breather valve 7 is fixedly installed above the pipe port 6, and a pipe port 8 is fixedly connected to the other end of the tank body 1, a tuning fork switch 9 is fixedly installed above the pipe port 8. By replacing the traditional breather valve with a high-efficiency environmentally friendly breather valve 7, the emission of volatile organic compounds is reduced, and by installing the tuning fork switch 9, the accuracy of liquid level monitoring is ensured.

[0023] In this embodiment, preferably, a foam tube 10 is connected to one end of the storage tank body 1, and a foaming tube 11 is fixedly connected inside the foam tube 10. Foaming holes 12 are evenly opened on the inner side of the foaming tube 11. A large amount of foam can be delivered to the fire area at the first moment of a fire through the foaming tube 11. The foam can effectively cover the burning liquid surface, isolate oxygen, and quickly extinguish the fire, greatly improving the fire extinguishing efficiency and providing a solid guarantee for the safety of the storage tank.

[0024] In this embodiment, preferably, a sampling port 13 is provided on one side of the top of the storage tank body 1, and a static electricity elimination device 14 is fixedly installed on both sides of the sampling port 13. Through the combination of the static electricity elimination structure, copper grounding electrode and anti-static rubber handle, it is ensured that static electricity can be discharged in time during the operation of the storage tank, effectively avoiding electrostatic discharge accidents caused by static electricity accumulation, and improving the safety and stability of the device.

[0025] In this embodiment, preferably, an anti-slip steel grating plate 15 is fixedly installed on the top of the tank body 1, and a railing 16 is fixedly and vertically installed on the outer end of the anti-slip steel grating plate 15. A high-level observation manhole 17 is opened on one side of the sampling port 13 of the tank body 1. By adding an inspection and maintenance platform on the top of the tank, daily maintenance and repair are facilitated. By adding a high-level observation manhole 17, it is convenient to observe the internal condition of the tank.

[0026] In this embodiment, preferably, a pressure transmitter 18 is fixedly installed on the top of the tank body 1 on the side away from the high-level observation manhole 17, and a metering-grade radar level gauge and waveguide 19 are fixedly installed on one end of the outer wall of the tank body 1. By adding a pressure transmitter 18 to the top of the tank, the pressure inside the tank can be monitored in real time for easy observation. The addition of a metering-grade radar level gauge and waveguide 19 to the tank can improve the metering accuracy.

[0027] This embodiment of a pressure control device for nitrogen sealing of storage tanks, through the immersion sealing in the floating roof 201 sealing structure, greatly reduces the risk of material volatilization inside the tank, reduces the escape of flammable and harmful gases, and reduces the risk of fire and explosion and environmental pollution from the source. At the same time, the efficient sealing also prevents external air, moisture, and other impurities from entering the tank, ensuring the stability of the stored medium quality and avoiding potential safety problems caused by medium deterioration. Furthermore, the electrostatic elimination structure, through the combination of a copper grounding electrode and an anti-static rubber handle, ensures that static electricity is promptly discharged during tank operations, effectively preventing... To avoid electrostatic discharge accidents caused by static electricity accumulation and improve the safety and stability of the device, the breather valve structure is replaced with a high-efficiency and environmentally friendly type. With its precise pressure sensing and regulation mechanism, it significantly reduces VOC emissions while ensuring normal tank breathing. Furthermore, by bypassing the diffuser at the inlet 3, materials can enter the tank evenly and stably, reducing energy loss and splashing caused by material impact, thereby reducing material volatilization and achieving both energy saving and environmental protection benefits. Multiple parts of the tank body 1 and its auxiliary structures undergo anti-corrosion treatment, reducing wear and extending the tank's service life and improving the device's practicality. The above describes the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made without departing from the spirit and scope of this utility model, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A pressure control device for nitrogen sealing in storage tanks, comprising a storage tank body (1) and an auxiliary mechanism (2), characterized in that: The auxiliary mechanism (2) is located at one end inside the tank body (1), and the bottom plate and inner wall of the tank body (1) are treated with anti-corrosion. The auxiliary mechanism (2) includes a floating plate (201), an inner cavity (202) and a sealing strip (203). The inner cavity (202) is provided inside the tank body (1). The floating plate (201) is installed at the top of the inner wall of the inner cavity (202). The sealing strip (203) is fixedly installed on one side of the floating plate (201). The floating plate (201) and the inner cavity (202) adopt a liquid immersion sealing structure, and the sealing strip (203) is tightly attached to the inner wall of the inner cavity (202).

2. The pressure control device for nitrogen sealing of storage tanks according to claim 1, characterized in that: The top of the storage tank body (1) is provided with a feed inlet (3), a pipe inlet (4) is fixedly connected above the feed inlet (3), a dispersing pipe (5) is fixedly connected to the bottom of the feed inlet (3), a pipe inlet (6) is fixedly connected to one end of the storage tank body (1), an environmentally friendly breathing valve (7) is fixedly installed above the pipe inlet (6), a pipe inlet (8) is fixedly connected to the other end of the storage tank body (1), and a tuning fork switch (9) is fixedly installed above the pipe inlet (8).

3. The pressure control device for nitrogen sealing of storage tanks according to claim 1, characterized in that: One end of the storage tank body (1) is connected to a foam tube (10), and a foaming tube (11) is fixedly connected inside the foam tube (10). Foaming holes (12) are evenly opened on the inner side of the foaming tube (11).

4. A pressure control device for nitrogen sealing of storage tanks according to claim 1, characterized in that: A sampling port (13) is provided on one side of the top of the storage tank body (1), and a device (14) for eliminating static electricity of the human body is fixedly installed on both sides of the sampling port (13).

5. A pressure control device for nitrogen sealing of storage tanks according to claim 1, characterized in that: The top of the storage tank body (1) is fixedly installed with an anti-slip steel grating (15), and the outer end of the anti-slip steel grating (15) is fixedly and vertically installed with a railing (16). A high-level observation manhole (17) is opened on one side of the sampling port (13) of the storage tank body (1).

6. A pressure control device for nitrogen sealing of storage tanks according to claim 1, characterized in that: A pressure transmitter (18) is fixedly installed on the top of the tank body (1) away from the high-level observation manhole (17), and a metering-grade radar level gauge and waveguide (19) are fixedly installed on one end of the outer wall of the tank body (1).

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