A stainless steel tank for storing acetic anhydride

Abstract

This invention provides a stainless steel tank for storing acetic anhydride, comprising a stainless steel tank body with an outer wall including a heat insulation layer. The top of the tank body has a liquid inlet, a pressure regulator, and a threaded groove. A sealing cap is connected to the liquid inlet, and the sealing cap has a threaded hole. The threaded groove and the threaded hole are connected by a screw. The interior of the stainless steel tank has a flow guide channel and a flow guide plate from top to bottom. This stainless steel tank, by incorporating a composite heat insulation layer to prevent excessively high internal storage temperatures, and by using a multi-stage buffer system including the flow guide channel and flow guide plate to prevent liquid splashing, along with the added pressure regulator to automatically adjust the internal pressure, significantly improves the safety of the acetic anhydride storage device.

Description

Technical Field

[0001] This utility model belongs to the field of chemical storage tank technology, specifically relating to a stainless steel tank for storing acetic anhydride. Background Technology

[0002] Acetic anhydride, also known as acetic anhydride or anhydrous acetic acid, is an important organic chemical raw material. It is chemically very reactive, has a strong acetic acid odor, a sour taste, is hygroscopic, slightly soluble in water (slowly hydrolyzing to acetic acid in water), and soluble in organic solvents such as alcohols, ethers, and acetone. It is flammable and corrosive; avoid contact with skin and eyes to prevent injury, as it is a lachrymatory agent. Its vapor can form explosive mixtures with air, and it can ignite and explode upon contact with open flames or high heat. It can also react chemically with strong oxidizers. Acetic anhydride is commonly used as an acetylation reagent, and is also used in pharmaceuticals, dyes, cellulose acetate manufacturing, initiators, and bleaching agents. It has wide applications in the rubber industry, textile industry, semiconductor manufacturing, and organic synthesis.

[0003] Most of the major fires and explosions in recent years have been caused by chemical substances, primarily due to excessive heat buildup during production, transportation, or storage. At high temperatures, volatile chemicals can release chemical vapors during container opening, posing a threat to the environment and personnel safety. Furthermore, due to the volatility of many chemicals, the internal pressure of the containers increases after prolonged storage and transportation, and since most storage devices lack pressure relief mechanisms, this can easily lead to safety accidents. Current acetic anhydride storage devices are often stainless steel ship tanks or plastic drums, with simple tank structures and no pressure monitoring devices, resulting in low safety. Utility Model Content

[0004] To address the problems existing in the prior art, the purpose of this utility model is to provide a stainless steel tank for storing acetic anhydride. It can prevent liquid splashing inside the tank by using a multi-stage buffering and diversion system such as a flow guide channel and a flow guide plate. In addition, a pressure regulator is added to automatically adjust the gas pressure inside the tank, so as to achieve the function of storing acetic anhydride while ensuring safety.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A stainless steel tank for storing acetic anhydride includes a stainless steel tank body. The outer wall of the stainless steel tank body includes a heat insulation layer. The top of the stainless steel tank body is provided with a liquid inlet, a pressure regulator, and a threaded groove. The liquid inlet is connected to a sealing cap, and the sealing cap has a threaded hole. The bottom of the stainless steel tank body is provided with a discharge port, and the discharge port is equipped with a discharge butterfly valve. The interior of the stainless steel tank body has a flow guide groove and a flow guide plate from top to bottom.

[0007] Furthermore, the heat insulation layer is composed of an inner aerogel board and an outer vacuum insulation board, with aluminum silicate fiber filling the space between the inner aerogel board and the outer vacuum insulation board.

[0008] Furthermore, a sealing ring is fixedly connected to the inner wall of the liquid inlet, and the shape and size of the sealing ring are matched with the shape and size of the liquid inlet and the sealing cap, and the sealing ring is a rubber sealing ring.

[0009] Furthermore, the pressure regulator includes a pressure balancing pipe and a gas absorption box. The pressure balancing pipe includes a guide rod, a movable partition, a fixed orifice plate, and a helical spring. The upper end of the guide rod passes through the movable partition, and the lower end of the guide rod is fixedly connected to the fixed orifice plate. The movable partition is elastically connected to the fixed orifice plate through the helical spring, and the helical spring is sleeved on the rod surface of the guide rod. The gas absorption box contains at least one of activated carbon and silica gel particles.

[0010] Furthermore, the threaded groove and threaded hole are connected by screw threads, which can fix the connection between the sealing cap and the tank body.

[0011] Furthermore, the guide channel is cone-shaped, and a mesh partition is provided at the bottom of the guide channel.

[0012] Furthermore, the guide plate includes a base plate and a spiral shaft. The base plate is provided with multiple guide holes, and the spiral shaft is fixedly connected to the upper side of the base plate, and the spiral shaft is provided with multiple spiral blades.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This invention provides a stainless steel tank for storing acetic anhydride. By setting a composite heat insulation layer, the internal temperature of the stainless steel tank is prevented from becoming too high. A multi-stage buffer flow of guide channels and guide plates is added to prevent liquid splashing inside the tank. At the same time, a pressure regulator is added to automatically adjust the gas pressure inside the tank, preventing explosions caused by excessive internal pressure. This greatly improves the safety of the acetic anhydride storage device. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the air pressure balance tube of this utility model;

[0017] Figure 3 for Figure 1 Enlarged diagram of point A in the middle.

[0018] In the diagram: 1. Stainless steel tank body, 2. Insulation layer, 3. Aerogel board, 4. Aluminum silicate fiber, 5. Vacuum insulation board, 6. Liquid inlet, 7. Pressure regulator, 8. Threaded groove, 9. Sealing cover, 10. Rubber sealing ring, 11. Threaded hole, 12. Screw, 13. Pressure balance pipe, 14. Gas absorption box, 15. Guide rod, 16. Moving partition, 17. Fixed orifice plate, 18. Helical spring, 19. Discharge port, 20. Discharge butterfly valve, 21. Guide groove, 22. Guide plate, 23. Bottom plate, 24. Spiral shaft, 25. Spiral blade. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] The terms "upper," "lower," and "one" used in this utility model are merely for clarity of description and are not intended to limit the scope of implementation of this utility model. Any changes or adjustments to their relative relationships, without substantially altering the technical content, shall also be considered within the scope of implementation of this utility model.

[0021] Reference Figures 1-3A stainless steel tank for storing acetic anhydride includes a stainless steel tank body 1. The outer wall of the stainless steel tank body includes a heat insulation layer 2, which is composed of an inner aerogel board 3 and an outer vacuum insulation board 5, with aluminum silicate fiber 4 filling the space between the inner and outer layers. The top of the stainless steel tank body 1 is provided with a liquid inlet 6, a pressure regulator 7, and a threaded groove 8. The liquid inlet 6 is connected to a sealing cap 9, and a rubber sealing ring 10 is fixedly connected to the inner wall of the liquid inlet 6. The shape and size of the rubber sealing ring 10 are matched with the shape and size of the combination of the liquid inlet 6 and the sealing cap 9. The sealing cap 9 is provided with a threaded hole 11, and the threaded groove 8 and the threaded hole 11 are threadedly connected by a screw 12 to fix the connection between the sealing cap 9 and the stainless steel tank body 1. The pressure regulator 7 includes a pressure balancing pipe 13 and a gas absorption box 14. The pressure balancing pipe includes a guide rod 15, a movable partition 16, a fixed orifice plate 17, and a helical spring 18. The upper end of the guide rod 15 passes through the movable partition 16, and the lower end of the guide rod 15 is fixedly connected to the fixed orifice plate 17. The movable partition 16 is elastically connected to the fixed orifice plate 17 via the helical spring 18, which is sleeved on the rod surface of the guide rod 15. The gas absorption box 14 contains at least one of activated carbon and silica gel particles to absorb overflowing acetic anhydride gas. The bottom of the stainless steel tank 1 is provided with a discharge port 19, and a discharge butterfly valve 20 is provided on the discharge port 19. The stainless steel tank 1 has a flow channel 21 and a flow guide plate 22 arranged from top to bottom inside. The flow channel 21 is conical and has a mesh partition at the bottom. The flow guide plate 22 includes a bottom plate 23 and a spiral shaft 24. The bottom plate 23 has multiple flow guide holes. The spiral shaft 24 is fixedly connected to the upper side of the bottom plate 23 and has multiple spiral blades 25.

[0022] Working Principle: When using the stainless steel tank, acetic anhydride is poured into the tank through the inlet. The sealing cap is then inserted into the inlet to seal it. Screws are then inserted into the screw holes and slots and rotated to secure the cap in place. After passing through the inlet, the acetic anhydride first flows through a conical guide channel, then through a guide plate into the lower part of the stainless steel tank for storage. The liquid flows along the mesh baffle at the bottom of the conical guide channel to the spiral blades of the guide plate, and finally flows through the guide holes of the guide plate to the lower part of the tank. The user dispenses the acetic anhydride by controlling the discharge butterfly valve.

[0023] The stainless steel tank is equipped with a pressure regulator at the top. Due to the inherent volatility of acetic anhydride, the internal pressure of the tank will gradually increase during long-term storage. When the internal pressure difference exceeds the tension of the helical spring on the moving baffle, the baffle will move upwards along the guide rod. During this process, the volatile gases inside the tank overflow through the fixed orifice plate and are absorbed by activated carbon and silica gel particles in the gas absorption box. The activated carbon and silica gel particles effectively adsorb the volatile gases of acetic anhydride, thus preventing leakage. After a certain amount of gas has overflowed, the internal pressure difference becomes less than the tension of the helical spring on the moving baffle, and the internal pressure returns to normal. The helical spring on the guide rod then pulls the moving baffle back to its original position. This automatic pressure regulation of the stainless steel tank, combined with the thermal insulation layer on the outer wall, prevents explosions caused by high temperature and high pressure, greatly improving the safety of the acetic anhydride stainless steel storage tank.

[0024] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A stainless steel tank for storing acetic anhydride, comprising a stainless steel tank body, characterized in that, The outer wall of the stainless steel tank includes a heat insulation layer. The top of the stainless steel tank is provided with a liquid inlet, a pressure regulator and a threaded groove. The liquid inlet is connected to a sealing cap. The sealing cap is provided with a threaded hole. The threaded groove and the threaded hole are connected by a screw thread. The pressure regulator includes a pressure balance pipe and a gas absorption box. The bottom of the stainless steel tank is provided with a discharge pipe port. The discharge pipe port is provided with a discharge butterfly valve. The interior of the stainless steel tank is provided with a guide groove and a guide plate from top to bottom.

2. A stainless steel tank for storing acetic anhydride according to claim 1, characterized in that, The insulation layer is composed of an inner aerogel board and an outer vacuum insulation board, with aluminum silicate fiber filling the space between the inner aerogel board and the outer vacuum insulation board.

3. A stainless steel tank for storing acetic anhydride according to claim 1, characterized in that, A sealing ring is fixedly connected to the inner wall of the liquid inlet, and the shape of the sealing ring matches the shape and size of the liquid inlet and the sealing cap. The sealing ring is a rubber sealing ring.

4. A stainless steel tank for storing acetic anhydride according to claim 1, characterized in that, The pressure balancing tube includes a guide rod, a movable partition, a fixed orifice plate, and a helical spring. The upper end of the guide rod passes through the movable partition, and the lower end of the guide rod is fixedly connected to the fixed orifice plate. The movable partition is elastically connected to the fixed orifice plate through the helical spring, and the helical spring is sleeved on the rod surface of the guide rod. The gas absorption box contains at least one of activated carbon and silica gel particles.

5. A stainless steel tank for storing acetic anhydride according to claim 1, characterized in that, The guide channel is conical in shape and has a mesh partition at the bottom. The guide plate includes a base plate and a spiral shaft. The base plate has multiple guide holes. The spiral shaft is fixedly connected to the upper side of the base plate and has multiple spiral blades.

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