Chemical storage tank with anti-explosion system

Abstract

The utility model relates to the technical field of petrochemical production, in particular to a chemical storage tank with an anti-explosion system, which solves the problem that the safety is insufficient when the existing anti-explosion storage tank exhausts and relieves pressure, and comprises a storage tank body, a feeding end is arranged at the upper end of the storage tank body, and a discharging end is arranged at the lower end of the storage tank body. A pressure relief pipe with a plugging valve plate is arranged at the upper end of the storage tank body, a pressure relief mechanism is mounted on the pressure relief pipe and comprises an inner pipe, an electronic barometer, an outer pipe and a collecting tank, the pressure relief pipe is hermetically sleeved with the inner pipe, the electronic barometer is arranged on the inner pipe, the inner pipe is hermetically sleeved with the outer pipe, and the collecting tank is connected to the tail end of the outer pipe. An inert gas device is installed on the inner pipe in a communicating mode, the inert gas device comprises a gas tank and an on-off electromagnetic valve for controlling on-off of the gas tank, and the electronic barometer is in electric signal connection with the on-off electromagnetic valve.

Description

Technical Field

[0001] This utility model relates to the field of petrochemical production technology, specifically to a chemical storage tank with an explosion-proof system. Background Technology

[0002] The explosion-proof structural design of chemical storage tanks mainly revolves around core objectives such as preventing the formation of explosive atmospheres, controlling leakage and diffusion, suppressing ignition sources, and emergency pressure relief. As shown in Chinese patent application CN 118458179 A, ​​an explosion-proof storage tank is proposed. When the gas pressure inside the oil storage tank reaches the first pressure pre-value, the higher gas pressure can force open the initial sealing valve plate. During the flow of oil along the vent chamber, it is blocked by the oil filter membrane. The high-pressure gas is discharged from the exhaust pipe through the oil filter membrane or buffer pipe, thereby completing the rapid discharge of high-pressure gas. When the gas pressure reaches the second pressure pre-value, in order to prevent the oil filter membrane from obstructing the flow of oil too much, a buffer pipe is set. The higher gas pressure carries a small amount of oil around the oil filter membrane and flows into the side near the exhaust pipe through the buffer pipe, thereby reducing the amount of oil discharged from the exhaust pipe and reducing the impact of excessive pressure on the oil storage tank and the external environment.

[0003] The structure of this explosion-proof storage tank is designed for petroleum products; however, when it is used for other volatile liquids and the thermal stability of their volatile gases is insufficient, the high-pressure gas discharged directly may cause harm to the surrounding operators and is also easily affected by the surrounding heat sources, causing safety accidents. Summary of the Invention

[0004] Therefore, this utility model provides a chemical storage tank with an explosion-proof system, which solves the problem of insufficient safety of existing explosion-proof storage tanks when venting and depressurizing.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0006] A chemical storage tank with an explosion-proof system includes a tank body, an inlet end at the upper end of the tank body and a outlet end at the lower end. A pressure relief pipe with a sealing valve is installed at the upper end of the tank body. A pressure relief mechanism is installed on the pressure relief pipe. The pressure relief mechanism includes an inner tube sealed to the pressure relief pipe, an electronic pressure gauge mounted on the inner tube, an outer tube sealed to the outside of the inner tube, and a collection trough connected to the end of the outer tube. An inert gas device, which is a gas cylinder, is connected to the inner tube, along with an opening and closing solenoid valve that controls the opening and closing of the gas cylinder. The electronic pressure gauge is electrically connected to the opening and closing solenoid valve.

[0007] Preferably, a water storage tank is connected to the outer pipe.

[0008] Preferably, the storage tank body consists of an outer tank, an inner tank, and an explosion-proof material layer embedded between the two.

[0009] Preferably, the storage tank body is provided with an extended detection tube with a closed end in the middle, and an array of light and temperature sensors is arranged in a ring around the outside of the extended detection tube. The extended detection tube is a single-layer structure extending outward from the inner tank body.

[0010] Preferably, a metal structural mesh is also provided between the outer tank and the inner tank.

[0011] By adopting the aforementioned technical solution, the beneficial effects of this utility model are:

[0012] This technical solution improves upon traditional pressure relief mechanisms by incorporating an inert gas device to continuously reduce the concentration of combustible gases during the pressure relief process. Compared to traditional passive pressure relief methods, this significantly reduces the risk of explosion. The inner and outer pipes, along with a collection tank at the end of the outer pipe, create a closed collection system. The collection tank is designed with environmentally friendly treatment liquid or similar materials to absorb the discharged high-pressure gas, preventing direct discharge into the atmosphere and thus protecting the environment and operator safety. This further ensures that the discharged gas will not ignite, thereby enhancing safety during pressure relief and exhaust. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0014] Figure 2 This is a schematic diagram of the pressure relief mechanism in an embodiment of the present invention (partial enlarged view at point A);

[0015] Figure 3 This is a schematic diagram of the stacked internal structure of the storage tank body in an embodiment of the present invention (partial enlarged view at point B).

[0016] Reference numerals in the attached drawings: 1. Tank body; 1a. Feeding end; 1b. Discharge end; 1c. Pressure relief pipe; 11. Outer tank; 12. Inner tank; 13. Explosion-proof material layer; 14. Metal structure mesh; 15. Extended detection pipe; 16. Light and temperature sensor; 2. Pressure relief mechanism; 21. Inner pipe; 211. Electronic pressure gauge; 22. Outer pipe; 23. Collection tank; 24. Inert gas device; 241. Gas tank; 242. Solenoid valve; 3. Water storage tank. Detailed Implementation

[0017] The following will describe the implementation of this utility model in detail with reference to specific embodiments, so that the process of how this utility model uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly. Example

[0018] refer to Figures 1 to 3A chemical storage tank with an explosion-proof system includes a tank body 1. The upper end of the tank body 1 is provided with a feed end 1a and the lower end is provided with a discharge end 1b. The upper end of the tank body 1 is provided with a pressure relief pipe 1c with a sealing valve plate. A pressure relief mechanism 2 is installed on the pressure relief pipe 1c. The pressure relief mechanism 2 includes an inner tube 21 sealed and fitted on the pressure relief pipe 1c, an electronic pressure gauge 211 installed on the inner tube 21, an outer tube 22 sealed and fitted outside the inner tube 21, and a collection tank 23 connected to the end of the outer tube 22. An inert gas device 24 is connected and installed on the inner tube 21. The inert gas device 24 is a gas tank 241 and an opening and closing solenoid valve 242 that controls the opening and closing of the gas tank 241. The electronic pressure gauge 211 is electrically connected to the opening and closing solenoid valve 242. This technical solution improves upon the traditional pressure relief mechanism 2 by incorporating an inert gas device 24 to continuously reduce the concentration of combustible gas during the pressure relief process. Compared to traditional passive pressure relief methods, this significantly reduces the risk of explosion. The sleeve design of the inner pipe 21 and the outer pipe 22, along with the collection tank 23 at the end of the outer pipe 22, creates a closed collection system. The collection tank 23 is designed with environmentally friendly treatment liquid or similar materials to absorb the discharged high-pressure gas, preventing direct discharge into the atmosphere and thus protecting the environment and operator safety. This further ensures that the discharged gas will not ignite, improving the safety of pressure relief and exhaust.

[0019] In this embodiment, the outer pipe 22 is connected to the water storage tank 3 via a DN80 pipeline. Water is injected into the tank, and pH adjusters and other reagents are added as needed to cooperate with the liquid stored inside the tank for treatment. The water storage tank 3 is configured to obtain a water seal function, which can prevent the risk of backfire. At the same time, the pipeline can also be flushed during maintenance, including forward flushing of the outer pipe 22 and backflushing of the inner pipe 21, to achieve a cleaning effect.

[0020] In this embodiment, the storage tank body 1 consists of an outer tank 11, an inner tank 12, and an explosion-proof material layer 13 embedded between them. The inner tank 12 is made of S31603 stainless steel with a wall thickness of 8mm and employs a fully welded structure. The outer tank 11 is made of Q345R stainless steel with a wall thickness of 6mm. A 50mm thick expanded graphite layer with a density of 1.1g / cm³ and a thermal conductivity of 5W / m•K is filled between the outer and inner tank 11. The filling layer is pre-pressed and sealed in segments, each segment being 1m long, with a 10mm expansion joint between segments. With this structure, the expanded graphite layer of the storage tank body 1 can absorb 30%-40% of the energy under explosive impact, while its thermal conductivity reduces the rate of temperature rise of the tank wall by 50%. The segmented design prevents cracks caused by thermal expansion and contraction, ensuring long-term sealing. Furthermore, a metal structure mesh 14, specifically a 304 stainless steel diamond mesh, is provided between the outer tank 11 and the inner tank 12. It is connected to the tank grounding stake through a copper braided strip. The metal structure mesh 14 reduces the overall resistance of the tank to below 0.1Ω, eliminating the risk of static electricity accumulation. The mesh structure improves the tank's resistance to explosion pressure and prevents the tank from tearing.

[0021] In this embodiment, an extended detection tube 15 with a closed end is provided in the middle of the storage tank body 1. An array of light and temperature sensors 16 is arranged in a ring around the outside of the extended detection tube 15. The extended detection tube 15 is a single-layer structure extending outward from the inner tank body 12. The extended detection tube 15 extends horizontally outward from the middle of the inner tank body 12, and its end does not penetrate the outer tank body 11. The array of light and temperature sensors 16 is arranged on the outer wall of the tube. The extended detection tube 15 is an extension of the inner tank body 12 that is in contact with the stored liquid, thereby realizing the monitoring of the axial temperature gradient of the storage tank. It can locate local hot spots in the inner tank body 12, and the detection response time is short. Compared with traditional top single-point monitoring, it can realize early warning and greatly improve the safety detection rate.

[0022] This technical solution achieves three core objectives—reduced explosion risk, environmental compliance, and reduced operation and maintenance costs—through structural innovation and intelligent control synergy. It is applicable to high-risk chemical storage scenarios in the petrochemical, pharmaceutical, and other fields.

[0023] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.

Claims

1. A chemical storage tank with an explosion-proof system, comprising a tank body (1), an inlet end (1a) is arranged at the upper end of the tank body (1), and an outlet end (1b) is arranged at the lower end, characterized in that: The upper end of the storage tank body (1) is provided with a pressure relief pipe (1c) with a blocking valve piece, a pressure relief mechanism (2) is installed on the pressure relief pipe (1c), the pressure relief mechanism (2) comprises an inner pipe (21) sealingly sleeved on the pressure relief pipe (1c), an electronic air pressure gauge (211) arranged on the inner pipe (21), an outer pipe (22) sealingly sleeved on the outside of the inner pipe (21), and a collecting groove (23) connected to the end of the outer pipe (22), the inner pipe (21) is provided with an inert gas device (24) in communication, the inert gas device (24) is a gas tank (241) and an opening and closing electromagnetic valve (242) for controlling the opening and closing of the gas tank (241), and the electronic air pressure gauge (211) and the opening and closing electromagnetic valve (242) are electrically connected.

2. A chemical storage tank with an explosion prevention system according to claim 1, characterized in that: The outer pipe (22) is communicated with a water storage tank (3).

3. A chemical storage tank with an explosion prevention system according to claim 1, characterized in that: The storage tank body (1) is composed of an outer tank body (11), an inner tank body (12) and an explosion-proof material layer (13) embedded between the two.

4. A chemical storage tank with an explosion prevention system according to claim 3, characterized in that: The middle part of the storage tank body (1) is provided with an extension detection pipe (15) with a closed end, an array of light temperature sensors (16) is arranged on the outside of the extension detection pipe (15), and the extension detection pipe (15) is a single-layer structure extending outward from the inner tank body (12).

5. A chemical storage tank with an explosion prevention system according to claim 3, characterized in that: A metal structure net (14) is further arranged between the outer tank body (11) and the inner tank body (12).

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