Chemical raw material storage tank

Abstract

The utility model belongs to the technical field of storage tank, especially chemical raw material storage tank, including the jar body, the inside of jar body has the accommodation chamber for storing chemical raw material, the top of jar body is equipped with with the accommodation chamber intercommunication, is used for to the input chemical raw material of jar body's feed pipe, the bottom of jar body is equipped with with the accommodation chamber intercommunication, is used for from the output chemical raw material of jar body's discharge pipe, still includes pressure buffer sac body, its inside has the gas storage space for buffering pressure change in jar body, the inlet and outlet of pressure buffer sac body pass through the ventilation channel of opening on jar body and extend to the outside of jar body, when the pressure in jar rises, pressure buffer sac body is extruded, and the internal gas is discharged to the outside through the inlet and outlet, when the pressure in jar drops, the atmospheric pressure of outside world will press the gas into pressure buffer sac body, and the gas volume in jar is supplemented, and the relative stability of the pressure in jar is maintained, and the air of outside world can also avoid the pollution of the storage raw material in the inside of jar body.

Description

Technical Field

[0001] This utility model belongs to the field of storage tank technology, and specifically relates to a chemical raw material storage tank. Background Technology

[0002] In the production and storage processes of the chemical industry, chemical raw material storage tanks are indispensable key equipment. The basic structure of existing chemical raw material storage tanks mainly consists of a tank body, inside which is a receiving chamber for storing chemical raw materials. A feed pipe, connected to the receiving chamber, is usually located at the top of the tank body to allow the chemical raw materials to be fed into the tank; a discharge pipe, also connected to the receiving chamber, is located at the bottom of the tank body to allow the chemical raw materials to be discharged from the tank.

[0003] However, many chemical raw materials are highly volatile, such as gasoline, alcohol, and acetone. During storage, these raw materials continuously evaporate from a liquid state to a gaseous state, leading to an increase in gas inside the tank. As the gas continues to accumulate, the pressure inside the tank gradually rises. Especially in the high temperatures of summer, the evaporation rate of volatile raw materials like gasoline accelerates, making the pressure rise inside the storage tank even more pronounced.

[0004] To address the issue of pressure buildup inside chemical storage tanks, the commonly used method is to install breather valves. These valves release excess gas when the pressure rises and draw in air when the pressure drops, thus maintaining a relatively stable pressure. However, this traditional method has several drawbacks: for some organic liquids, oxygen, moisture, and impurities from the air can contaminate the liquid or react with certain chemical raw materials, leading to deterioration or the formation of new compounds. Furthermore, certain components in the air (such as carbon dioxide and sulfides) may react with the chemical raw materials inside the tank, producing corrosive substances that corrode the tank. Long-term corrosion can lead to leaks, causing safety accidents and posing serious safety hazards and economic losses to chemical production. Therefore, developing a new type of chemical storage tank that can effectively solve these problems is of significant practical importance. Utility Model Content

[0005] To address the above problems, the purpose of this utility model is to provide a chemical raw material storage tank that solves the problems mentioned in the background art.

[0006] This utility model provides a chemical raw material storage tank, including a tank body with an internal cavity for storing chemical raw materials. The top of the tank body is provided with a feed pipe connected to the cavity for feeding chemical raw materials into the tank body, and the bottom of the tank body is provided with a discharge pipe connected to the cavity for discharging chemical raw materials out of the tank body. The tank also includes a pressure buffer bladder installed inside the tank body, which has an internal gas storage space for buffering pressure changes within the tank. The inlet and outlet of the pressure buffer bladder pass through a ventilation channel on the tank body and extend to the outside of the tank body.

[0007] Preferably, the tank body is further provided with a spare buffer assembly, which includes an air guide cylinder installed on the tank body, a support sleeve movably connected to the end of the air guide cylinder away from the tank body, a fixed tube installed on the inner top wall of the support sleeve and having a movable cavity inside, a sealing rod slidably connected to the fixed tube and used to block the exhaust port of the air guide cylinder, and a compression spring sleeved on the end of the sealing rod located inside the movable cavity and used to limit the sealing rod.

[0008] Preferably, the device also includes a pressure sensor installed on the tank body, an electromagnetic check valve installed on the air guide tube, and a controller. The pressure sensor is connected to the controller and is controlled by the controller. The controller controls the operating state of the electromagnetic check valve by comparing the preset pressure value with the actual detected pressure value based on the pressure signal detected by the pressure sensor.

[0009] Preferably, the air inlet and outlet of the pressure buffer bladder are detachably connected to the tank body.

[0010] Preferably, the pressure buffer bladder is installed on the upper part of the tank, and its volume accounts for 5%-20% of the volume of the accommodating chamber.

[0011] Preferably, a protective component is also installed at the air inlet and outlet of the pressure buffer bladder. The protective component includes a protective cover mounted above the air inlet and outlet via a support frame and a filter cover detachably connected to the air inlet and outlet.

[0012] The beneficial effects of this utility model are as follows: By installing a pressure buffer bladder inside the tank, the gas storage space inside the bladder can effectively buffer changes in the tank pressure. When the tank pressure rises, the pressure buffer bladder is compressed, and the internal gas is discharged to the outside through the inlet and outlet. When the tank pressure drops, the external atmospheric pressure forces gas into the pressure buffer bladder to replenish the gas volume inside the tank and maintain a relatively stable tank pressure. The pressure buffer bladder is installed on the upper part of the tank, making full use of the internal space of the tank and avoiding direct contact with the chemical raw materials stored inside the tank, reducing the corrosion and damage of the pressure buffer bladder by the chemical raw materials, and further improving the service life of the pressure buffer bladder.

[0013] The backup buffer assembly serves as a backup buffer when the main pressure buffer system malfunctions or cannot meet pressure regulation requirements. When the tank pressure rises, the pressure overcomes the spring force of the compression spring and the weight of the sealing rod, causing the sealing rod to slide into the movable chamber, opening the vent and releasing the pressure inside the tank. When the tank pressure rises abnormally, the backup buffer assembly can release excess gas through the vent pipe, preventing serious accidents such as tank explosions due to excessive pressure, and greatly improving the safety and reliability of the storage tank. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a side view of the structural plan of this utility model; Figure 3 This is a cross-sectional structural diagram of the present invention; Figure 4 This is an enlarged structural diagram of point A in this utility model; Figure 5 This is an enlarged structural diagram of point B in this utility model.

[0015] In the diagram: 1. Tank body; 2. Receiving chamber; 3. Feed pipe; 4. Discharge pipe; 5. Pressure buffer bladder; 6. Gas storage space; 7. Inlet and outlet; 8. Pressure sensor; 9. Backup buffer assembly; 10. Controller; 11. Air guide tube; 12. Support sleeve; 13. Movable chamber; 14. Fixed pipe; 15. Exhaust port; 16. Sealing rod; 17. Compression spring; 18. Electromagnetic check valve; 19. Support frame; 20. Protective cover; 21. Filter cover. Detailed Implementation

[0016] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of this utility model in any way.

[0017] This utility model relates to an existing chemical raw material storage tank, which mainly includes a tank body 1. The tank body 1 has an internal chamber 2 for storing chemical raw materials. An inlet pipe 3, connected to the chamber 2, is located at the top of the tank body 1 for feeding chemical raw materials into the tank body 1. An outlet pipe 4, also connected to the chamber 2, is located at the bottom of the tank body 1 for discharging chemical raw materials from the tank body 1. This is a description of the existing chemical raw material storage tank. Because many chemical raw materials are highly volatile, such as gasoline, alcohol, and acetone, these raw materials will continuously evaporate from a liquid state to a gaseous state during storage, increasing the gas content inside the tank. As the gas accumulates, the pressure inside the tank gradually increases. For example, in high-temperature environments during summer, the evaporation rate of gasoline accelerates, and the pressure increase inside the gasoline storage tank 1 will be more pronounced. To address the aforementioned technical issues, breather valves are installed on chemical raw material storage tanks. Their function is to expel excess gas when the tank pressure increases and draw in air when the pressure decreases, thus maintaining a relatively stable tank pressure. However, for some organic liquids, oxygen, moisture, and impurities from the air can enter the tank and contaminate the liquid, or react with certain chemical raw materials through oxidation, leading to deterioration or the formation of new compounds. Furthermore, certain components in the air (such as carbon dioxide and sulfides) may react with the chemical raw materials inside the tank, producing corrosive substances that corrode the storage tank. Long-term corrosion can lead to tank leaks, potentially causing safety accidents.

[0018] Based on the above problems, this utility model adopts the following improvement method to solve them, such as... Figure 1-5As shown, a chemical raw material storage tank, based on existing technology, further includes a pressure buffer bladder 5. This pressure buffer bladder 5 is installed inside the tank body 1, and its interior has a gas storage space 6 for buffering pressure changes within the tank body 1. The inlet and outlet 7 of the pressure buffer bladder 5 pass through a ventilation channel on the tank body 1 and extend to the outside of the tank body 1. The pressure buffer bladder 5 is installed at the upper part of the tank body 1, which can fully utilize the internal space of the tank body 1, avoid direct contact with the chemical raw materials stored inside, reduce corrosion and damage to the pressure buffer bladder 5 from the chemical raw materials, and improve the service life of the pressure buffer bladder 5. Simultaneously, the inlet and outlet 7 of the pressure buffer bladder 5 are detachably connected to the tank body 1, such as by threaded connection, clamps, or bolts, to ensure the stability of the pressure buffer bladder 5 within the tank body 1, and also facilitate the inspection, replacement, or cleaning of the pressure buffer bladder 5. The volume of the pressure buffer bladder 5 occupies 5% of the volume of the accommodating chamber 2. The 20% ratio is an optimized range that ensures sufficient buffer space to effectively regulate pressure changes within the tank, without occupying excessive internal space and affecting the storage capacity of chemical raw materials. Specifically, when the internal pressure rises, the pressure buffer bladder 5 is compressed, and the internal gas is discharged to the outside through the inlet / outlet 7. When the internal pressure drops, atmospheric pressure forces gas into the pressure buffer bladder 5 to replenish the gas volume and maintain a relatively stable internal pressure. To prevent leakage of chemical raw materials from the tank and the entry of external impurities into the tank, a sealing structure is provided between the ventilation channel and the inlet / outlet 7. The sealing structure can be a rubber sealing ring or a sealing gasket. The pressure buffer bladder 5 is made of rubber, plastic, or a polymer composite material, and the appropriate material can be selected according to the properties of the stored chemical raw materials. When the stored chemical raw materials are highly corrosive, the pressure buffer bladder 5 is made of polytetrafluoroethylene or fluororubber; when the stored chemical raw materials are flammable and explosive, the pressure buffer bladder 5 is made of flame-retardant rubber or plastic.

[0019] Furthermore, such as Figure 1As shown in Figure 5, to prevent dust, rainwater, and other impurities from the external environment from entering the pressure buffer bladder 5 along the inlet and outlet, a protective component is also installed above the tank 1. This protective component includes a protective cover 20 and a filter cover 21. The protective cover 20 is installed above the inlet and outlet 7 via a support frame 19. The protective cover 20 is made of metal or high-strength plastic and is hemispherical or conical in shape, effectively blocking external rainwater, dust, debris, etc. This prevents these impurities from entering the pressure buffer bladder 5 or the tank 1, avoiding damage to the equipment or affecting the quality of chemical raw materials, and extending the service life of the equipment. The filter cover 21 is detachably installed to the inlet and outlet 7 via a threaded connection or a snap-fit ​​connection. In this technical solution, the filter cover 21 is connected to the inlet and outlet 7 via a threaded connection. The filter cover 21 adopts a conical structure, which can guide the impurities filtered on the filter cover 21 along the outer surface of the filter cover 21 while filtering impurities, reducing the chance of the filter cover 21 becoming clogged.

[0020] Furthermore, such as Figure 3-4 As shown, to further improve the safety of the storage tank, a backup buffer assembly 9 is also provided. This backup buffer assembly 9 includes an air guide cylinder 11 installed on the tank body 1, a support sleeve 12 movably connected to the end of the air guide cylinder 11 away from the tank body 1, a fixed tube 14 installed on the inner top wall of the support sleeve 12 and having a movable cavity 13 inside, a sealing rod 16 slidably connected to the fixed tube 14 and used to seal the exhaust port 15 of the air guide cylinder 11, and a compression spring 17 sleeved on the end of the sealing rod 16 located inside the movable cavity 13 and used to limit the movement of the sealing rod 16. The air guide cylinder 11 is fixed to the tank body 1 by welding or flange connection to ensure a strong and airtight connection. Simultaneously, the exhaust port 15 of the air guide cylinder 11 communicates with the receiving chamber 2 inside the tank body 1. Figure 4As shown, the side wall of the support sleeve 12 has a notch that communicates with the air guide cylinder 11. The support sleeve 12 and the air guide cylinder 11 are connected by a threaded connection or a pin connection to facilitate the disassembly and installation of the support sleeve 12 for component maintenance and replacement. When the main pressure buffer system fails or cannot meet the pressure regulation requirements, it can play a backup buffer role. In specific use, when the pressure in the tank 1 increases, the pressure in the tank 1 overcomes the elastic force of the compression spring 17 and the weight of the sealing rod 16, causing the sealing rod 16 to slide into the movable cavity 13, opening the exhaust port 15, and allowing the pressure inside the tank 1 to be released. When the pressure inside the tank rises abnormally, the backup buffer component 9 can discharge excess gas through the air guide cylinder 11, avoiding serious accidents such as explosion of the tank 1 due to excessive pressure, thus improving the safety and reliability of the storage tank. To facilitate precise timing of the activation of the backup buffer assembly 9, a pressure sensor 8 is installed on the tank 1, an electromagnetic check valve 18 is installed on the gas duct 11, and a controller 10 is also installed. The pressure sensor 8 is electrically connected to the controller 10 and is controlled by the controller 10. The controller 10 controls the operation of the electromagnetic check valve 18 based on the pressure signal detected by the pressure sensor 8, comparing a preset pressure value with the actual detected pressure value. The normally closed electromagnetic check valve 18 is closed under normal circumstances to prevent gas leakage from the tank 1 and ensure stable pressure inside the tank. When venting is required (when the pressure sensor 8 detects a rapid increase in pressure inside the tank 1 exceeding a preset threshold), the electromagnetic check valve 18 can be quickly opened under the control of the controller 10 to release excess pressure in the tank 1, preventing damage from excessive pressure. This control method is flexible and reliable, meeting the pressure regulation needs under different operating conditions. This intelligent control method eliminates the need for frequent manual intervention, improving the automation and accuracy of pressure regulation and reducing the workload of operators.

[0021] It should be noted that, in this document, 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. Specific examples have been used in this document to illustrate the principles and implementation methods of this utility model. The above examples are merely to aid in understanding the method and core ideas of this utility model. The above descriptions are only preferred embodiments of this utility model. It should be pointed out that, due to the limitations of written expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or variations can be made without departing from the principles of this utility model, and the above technical features can be combined in an appropriate manner. These improvements, modifications, variations, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of this utility model.

Claims

1. A chemical raw material storage tank, comprising a tank body (1), wherein the interior of the tank body (1) has a receiving chamber (2) for storing chemical raw materials, a feed pipe (3) connected to the receiving chamber (2) for feeding chemical raw materials into the tank body (1) is provided at the top of the tank body (1), and a discharge pipe (4) connected to the receiving chamber (2) for discharging chemical raw materials out of the tank body (1) is provided at the bottom of the tank body (1), characterized in that: It also includes a pressure buffer bladder (5), which is installed inside the tank (1) and has an air storage space (6) for buffering pressure changes inside the tank (1). The air inlet and outlet (7) of the pressure buffer bladder (5) pass through the ventilation channel opened on the tank (1) and extend to the outside of the tank (1).

2. A chemical raw material storage tank according to claim 1, characterized in that: The tank (1) is also provided with a spare buffer assembly (9), which includes an air guide cylinder (11) installed on the tank (1), a support sleeve (12) movably connected to the end of the air guide cylinder (11) away from the tank (1), a fixed tube (14) installed on the inner top wall of the support sleeve (12) and having a movable cavity (13) inside, a sealing rod (16) slidably connected to the fixed tube (14) and used to seal the exhaust port (15) of the air guide cylinder (11), and a compression spring (17) sleeved on the end of the sealing rod (16) inside the movable cavity (13) and used to limit the sealing rod (16).

3. A chemical raw material storage tank according to claim 2, characterized in that: It also includes a pressure sensor (8) installed on the tank (1), an electromagnetic check valve (18) installed on the air guide tube (11), and a controller (10). The pressure sensor (8) is connected to the controller (10) and is controlled by the controller (10). The controller (10) controls the operation of the electromagnetic check valve (18) by comparing the preset pressure value with the actual detected pressure value based on the pressure signal detected by the pressure sensor (8).

4. A chemical raw material storage tank according to claim 1, characterized in that: The air inlet and outlet (7) of the pressure buffer bladder (5) are detachably connected to the tank (1).

5. A chemical raw material storage tank according to claim 4, characterized in that: The pressure buffer bladder (5) is installed on the upper part of the tank (1), and its volume accounts for 5% - 20% of the volume of the accommodating chamber (2).

6. A chemical raw material storage tank according to claim 4, characterized in that: The pressure buffer bladder (5) is also equipped with a protective component at the air inlet and outlet (7). The protective component includes a protective cover (20) mounted above the air inlet and outlet (7) via a support frame (19) and a filter cover (21) detachably connected to the air inlet and outlet (7).

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