Leak-proof hydrogen fluoride acid storage tank

Abstract

The utility model discloses a kind of hydrogen fluoride acid storage tanks of leakage prevention, including tank body, the middle part of the outer surface of tank body upper end is provided with feed inlet, the bottom of the outer surface of tank body one side is provided with discharge port, the outer surface of tank body upper end is installed with exhaust port in one side.The utility model said a kind of hydrogen fluoride acid storage tank of leakage prevention, by the anticorrosive layer, metal barrier layer and elastic buffer layer being set, PTFE is corrosion resistant, metal layer blocks hydrogen fluoride acid penetration, elastic layer absorbs thermal expansion and contraction stress, prolongs service life, reduces leakage risk, solves the problem that traditional single material is easily permeable and easily cracked, additional condensation reflux type exhaust structure, built-in hydrogen fluoride acid absorbent active alumina particles avoid volatile gas direct external discharge, reduce environmental pollution, condensate liquid backflow to storage tank, reduce waste.

Description

Technical Field

[0001] This utility model relates to the field of hydrofluoric acid storage tank technology, specifically a leak-proof hydrofluoric acid storage tank. Background Technology

[0002] Hydrofluoric acid (HF), a highly corrosive chemical, is widely used in petrochemical, electronics, and metal processing industries. However, hydrofluoric acid has extremely strong penetrating and corrosive properties, causing severe corrosion to most metallic and non-metallic materials, and its vapors pose a significant hazard to human health and the environment.

[0003] Traditional hydrofluoric acid storage tanks typically employ a single-material structure, such as a pure polytetrafluoroethylene (PTFE) liner or a standard metal tank body. However, while PTFE is corrosion-resistant, prolonged contact with hydrofluoric acid can still lead to material degradation due to permeation, and its high coefficient of thermal expansion makes it prone to stress cracking under temperature changes. While metal tank bodies (such as stainless steel) possess a certain level of mechanical strength, hydrofluoric acid can corrode the metal, causing perforations or leaks. Furthermore, existing storage tanks often employ simple direct venting structures, failing to effectively treat the volatilized hydrofluoric acid gas. Direct emission not only wastes raw materials but also pollutes the environment and endangers human health.

[0004] Therefore, we propose a leak-proof hydrofluoric acid storage tank. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] In view of the shortcomings of the prior art, this utility model provides a leak-proof hydrofluoric acid storage tank, which can extend the service life, reduce the risk of leakage, and reduce environmental pollution, and can effectively solve the problems in the background art.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a leak-proof hydrofluoric acid storage tank, comprising a tank body, an inlet provided in the middle of the upper outer surface of the tank body, an outlet provided at the bottom of one side of the outer surface of the tank body, and an exhaust port installed on one side of the upper outer surface of the tank body. The exhaust port includes a condenser pipe, an absorption pipe, a bend, a coolant discharge valve, a coolant inlet valve, a protective net, activated alumina particles, a cooling annular chamber, a first spiral guide vane, and a second spiral guide vane. The condenser pipe is fixed to one side of the upper outer surface of the tank body, and the lower end of the condenser pipe extends into one side of the upper cavity of the tank body. The inner wall of the tank body is provided with a multi-layer composite lining, which includes, from the inside to the outside, an anti-corrosion layer, a metal barrier layer, and an elastic buffer layer.

[0009] Preferably, the anti-corrosion layer is made of polytetrafluoroethylene (PTFE) and is attached to the inner surface of the tank; the metal barrier layer is made of nickel alloy and covers the outside of the anti-corrosion layer; and the elastic buffer layer is made of fluororubber and is fixed between the metal barrier layer and the outer shell of the tank.

[0010] Preferably, the thickness of the metal barrier layer is 0.5~2mm, and the nickel alloy is Hastelloy.

[0011] Preferably, the thickness of the elastic buffer layer is 3~10mm.

[0012] Preferably, the bent tube is fixed between the upper outer surface of the condenser tube and the outer surface of one end of the absorber tube, and there are two sets of protective nets. The two sets of protective nets are fixed at the left and right ends of the inner cavity of the absorber tube, and the activated alumina particles are filled between the two sets of protective nets and the inner wall of the absorber tube.

[0013] Preferably, the cooling annular chamber is located inside the condenser tube, the first spiral guide vane is installed in the cooling annular chamber, the second spiral guide vane is fixed inside the condenser tube, the coolant discharge valve is fixed on the upper part of one side of the outer surface of the condenser tube, the coolant inlet valve is fixed on the lower part of one side of the outer surface of the condenser tube, and one end of both the coolant discharge valve and the coolant inlet valve extends into the interior of the cooling annular chamber.

[0014] (III) Beneficial Effects

[0015] Compared with the prior art, this utility model provides a leak-proof hydrofluoric acid storage tank, which has the following beneficial effects:

[0016] 1. This leak-proof hydrofluoric acid storage tank, through the setting of an anti-corrosion layer, a metal barrier layer and an elastic buffer layer, uses PTFE for corrosion resistance, the metal layer to block hydrofluoric acid penetration, and the elastic layer to absorb thermal expansion and contraction stress, thereby extending service life, reducing leakage risk, and solving the problems of easy penetration and cracking of traditional single materials.

[0017] 2. This leak-proof hydrofluoric acid storage tank is equipped with a condensation reflux exhaust structure and contains activated alumina particles as a built-in hydrofluoric acid absorbent to prevent the direct discharge of volatile gases, thereby reducing environmental pollution. The condensate is returned to the storage tank to reduce waste. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a leak-proof hydrofluoric acid storage tank according to the present invention.

[0019] Figure 2 This is a schematic diagram of the combined layering of a multi-layer composite lining in a leak-proof hydrofluoric acid storage tank according to the present invention.

[0020] Figure 3This is a schematic diagram of the exhaust port structure in a leak-proof hydrofluoric acid storage tank according to the present invention.

[0021] Figure 4 This is a side cross-sectional view of the exhaust port in a leak-proof hydrofluoric acid storage tank according to this utility model.

[0022] In the diagram: 1. Tank body; 2. Inlet; 3. Outlet; 4. Exhaust port; 5. Anti-corrosion layer; 6. Barrier layer; 7. Elastic buffer layer; 8. Condenser; 9. Absorption pipe; 10. Bend; 11. Coolant discharge valve; 12. Coolant inlet valve; 13. Protective net; 14. Activated alumina particles; 15. Cooling annular chamber; 16. First spiral guide vane; 17. Second spiral guide vane. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0024] This embodiment is a leak-proof hydrofluoric acid storage tank.

[0025] like Figure 1-4 As shown, the tank includes a tank body 1. A feed inlet 2 is provided in the middle of the upper outer surface of the tank body 1. A discharge outlet 3 is provided at the bottom of one side of the outer surface of the tank body 1. An exhaust port 4 is installed on one side of the upper outer surface of the tank body 1. The exhaust port 4 includes a condenser pipe 8, an absorption pipe 9, a bend pipe 10, a coolant discharge valve 11, a coolant inlet valve 12, a protective net 13, activated alumina particles 14, a cooling annular chamber 15, a first spiral guide vane 16, and a second spiral guide vane 17. The condenser pipe 8 is fixed to one side of the upper outer surface of the tank body 1, and the lower end of the condenser pipe 8 extends into one side of the upper part of the inner cavity of the tank body 1. The inner wall of the tank body 1 is provided with a multi-layer composite lining, which includes an anti-corrosion layer 5, a metal barrier layer 6, and an elastic buffer layer 7 from the inside to the outside.

[0026] The anti-corrosion layer 5 is made of polytetrafluoroethylene (PTFE) and adheres to the inner surface of the tank body 1. The metal barrier layer 6 is made of nickel alloy and covers the outside of the anti-corrosion layer 5. The elastic buffer layer 7 is made of fluororubber and is fixed between the metal barrier layer 6 and the outer shell of the tank body 1. The thickness of the metal barrier layer 6 is 0.5~2mm, and the nickel alloy is Hastelloy. The thickness of the elastic buffer layer 7 is 3~10mm. The bend 10 is fixed between the upper outer surface of the condenser tube 8 and the outer surface of one end of the absorption tube 9. There are two sets of protective nets 13, and the two sets of protective nets 13 are fixed to the absorption tube. At the left and right ends of the inner cavity 9, activated alumina particles 14 are filled between the two sets of protective nets 13 and the inner wall of the absorption tube 9; the cooling annular chamber 15 is opened inside the condenser tube 8, the first spiral guide vane 16 is installed in the cooling annular chamber 15, the second spiral guide vane 17 is fixed inside the condenser tube 8, the coolant discharge valve 11 is fixed on the upper part of the outer surface of one side of the condenser tube 8, and the coolant inlet valve 12 is fixed on the lower part of the outer surface of one side of the condenser tube 8. One end of the coolant discharge valve 11 and the coolant inlet valve 12 both extend into the interior of the cooling annular chamber 15.

[0027] It should be noted that this utility model is a leak-proof hydrofluoric acid storage tank. The tank body 1 has a multi-layer composite lining. The corrosion-resistant layer 5, made of polytetrafluoroethylene (PTFE), directly contacts the hydrofluoric acid, utilizing PTFE's chemical inertness to resist corrosion. The metal barrier layer 6, made of nickel alloy, blocks hydrofluoric acid penetration, and its high thermal conductivity evenly distributes localized thermal stress, preventing the PTFE layer from cracking due to temperature differences. The elastic buffer layer 7, made of fluororubber, compensates for the difference in thermal expansion coefficients between PTFE and the metal layer, absorbing thermal expansion and contraction. Stress is reduced, service life is extended, leakage risk is reduced, and the problems of easy penetration and cracking of traditional single materials are solved. After the material is added to the tank 1 through the feed port 2, the gas is discharged from the exhaust port 4. The coolant discharge valve 11 and the coolant inlet valve 12 are connected to the external cold water circulation equipment. Cold water is injected into the cooling annular chamber 15 through the coolant inlet valve 12 and guided by the first spiral guide vane 16. It is used to liquefy hydrofluoric acid vapor and reduce waste. Then it is treated by activated alumina particles 14 to adsorb uncondensed hydrofluoric acid gas and reduce the impact on the environment.

[0028] It should be noted that, in this document, relational terms such as first and second (number one, number two), etc., are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0029] The foregoing has shown and described 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 illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A leak-proof hydrofluoric acid storage tank, comprising a tank body (1), wherein a feed inlet (2) is provided at the middle of the upper outer surface of the tank body (1), and a discharge outlet (3) is provided at the bottom of one side of the outer surface of the tank body (1), characterized in that: The tank (1) has an exhaust port (4) installed on one side of the upper outer surface. The exhaust port (4) includes a condenser pipe (8), an absorption pipe (9), a bend pipe (10), a coolant discharge valve (11), a coolant inlet valve (12), a protective net (13), activated alumina particles (14), a cooling annular chamber (15), a first spiral guide vane (16) and a second spiral guide vane (17). The condenser pipe (8) is fixed on one side of the upper outer surface of the tank (1), and the lower end of the condenser pipe (8) extends into one side of the upper part of the inner cavity of the tank (1). The inner wall of the tank (1) is provided with a multi-layer composite lining, which includes an anti-corrosion layer (5), a metal barrier layer (6) and an elastic buffer layer (7) from the inside to the outside.

2. The leak-proof hydrofluoric acid storage tank according to claim 1, characterized in that: The anti-corrosion layer (5) is made of polytetrafluoroethylene and is attached to the inner surface of the tank body (1). The metal barrier layer (6) is made of nickel alloy and covers the outside of the anti-corrosion layer (5). The elastic buffer layer (7) is made of fluororubber material and is fixed between the metal barrier layer (6) and the outer shell of the tank body (1).

3. A leak-proof hydrofluoric acid storage tank according to claim 2, characterized in that: The thickness of the metal barrier layer (6) is 0.5~2mm, and the nickel alloy is Hastelloy.

4. A leak-proof hydrofluoric acid storage tank according to claim 3, characterized in that: The thickness of the elastic buffer layer (7) is 3~10mm.

5. A leak-proof hydrofluoric acid storage tank according to claim 4, characterized in that: The bent tube (10) is fixed between the upper outer surface of the condenser tube (8) and the outer surface of one end of the absorber tube (9). There are two sets of protective nets (13). The two sets of protective nets (13) are fixed at the left and right ends of the inner cavity of the absorber tube (9). The active alumina particles (14) are filled between the two sets of protective nets (13) and the inner wall of the absorber tube (9).

6. A leak-proof hydrofluoric acid storage tank according to claim 5, characterized in that: The cooling annular chamber (15) is located inside the condenser tube (8). The first spiral guide vane (16) is installed in the cooling annular chamber (15). The second spiral guide vane (17) is fixed inside the condenser tube (8). The coolant discharge valve (11) is fixed on the upper part of the outer surface of one side of the condenser tube (8). The coolant inlet valve (12) is fixed on the lower part of the outer surface of one side of the condenser tube (8). One end of the coolant discharge valve (11) and the coolant inlet valve (12) both extend into the interior of the cooling annular chamber (15).

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