Gas pressurized diaphragm full liquid inside floating disc device for storage tank

Abstract

A kind of gas pressurization diaphragm type inner liquid full floating disc device for storage tank, including foundation, gravity sensor is installed in foundation, storage tank is installed in the upper side of gravity sensor, air inlet is equipped on the top of storage tank, first fixed ring and second fixed ring are respectively fixed in storage tank, air inlet valve and first exhaust valve are distributed in the middle of first fixed ring and second fixed ring. First bladder and second bladder are respectively fixed on first fixed ring and second fixed ring. Nitrogen with pressure of 5MPa is filled between first bladder and second bladder. Oil inlet valve and oil outlet valve are in the bottom of storage tank, second exhaust valve is arranged in the lower side of oil inlet valve. Gravity sensor is connected with computer. By using the application, the isolation of oil liquid in storage tank and atmosphere can be effectively realized by diaphragm, to meet the needs of production operation.

Description

Technical Field

[0001] This invention relates to the field of internal floating roof technology, specifically to a gas pressurization diaphragm internal liquid floating roof device for storage tanks. Background Technology

[0002] Floating roofs are primarily used for oil storage and are an environmentally friendly and energy-saving device. Generally placed on top of the oil, the floating roof rises or falls with the oil level in the tank, always remaining above the oil surface. This limits the oil's contact with the atmosphere, reducing evaporation losses. Furthermore, in the event of a fire or other accident, the floating roof protects the combustion zone, effectively preventing its spread. In addition, the modular design of the floating roof components facilitates manufacturing, transportation, assembly, and installation, significantly shortening the commissioning cycle. Its high buoyancy, stability, and resistance to tilting and jamming allow multiple people to walk on it. With its excellent anti-evaporation properties, media compatibility, and applicability to daily operations, the floating roof has become the most widely used method for storing volatile liquids.

[0003] Currently, the floating roofs used in my country are mostly made of steel and aluminum. Steel floating roofs offer superior safety and environmental friendliness during oil storage, but they have certain shortcomings in meeting production operation requirements. Aluminum floating roofs effectively meet the actual requirements of production operations, but they are lacking in safety and environmental protection. The emergence of composite material floating roofs has ushered in a new stage in the development of floating roof production. Composite material floating roofs made of glass fiber reinforced plastic can achieve full liquid contact and have a seamless structure, enabling better control of oil evaporation emissions and meeting environmental and safety requirements. Furthermore, as lightweight floating roofs, composite material floating roofs can well meet production and operation needs. However, composite material floating roofs are more expensive, making large-scale promotion and use difficult at present. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention aims to provide a gas-pressurized diaphragm-type internal liquid-contact full floating plate device for storage tanks, which can effectively isolate the oil in the storage tank from the atmosphere and meet the needs of production and operation.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A gas-pressurized diaphragm-type internal liquid-contact full floating roof device for a storage tank includes a foundation 1, a gravity sensor 2 installed inside the foundation 1, a storage tank 3 mounted above the gravity sensor 2, an air inlet 4 at the top of the storage tank 3, and a first fixed ring 5 and a second fixed ring 6 fixedly connected inside the storage tank 3. An air inlet valve 7 and a first air outlet valve 8 are distributed between the first fixed ring 5 and the second fixed ring 6. A first bladder 9 and a second bladder 10 are fixedly connected to the first fixed ring 5 and the second fixed ring 6, respectively. Nitrogen gas 11 at a pressure of 5 MPa is filled between the first bladder 9 and the second bladder 10. An oil inlet valve 12 and an oil outlet valve 13 are located at the bottom of the storage tank 3, and a second air outlet valve 14 is installed below the oil inlet valve 12. The gravity sensor 2 is connected to a computer 15.

[0007] Before oil storage, the computer 15 calculates the total weight of oil that can enter the storage tank 3, and converts this into the total amount of nitrogen that needs to be introduced through the air inlet 4 and the air inlet valve 7. This ensures that the first bladder 9 and the second bladder 10 have appropriate expansion. The second bladder 10 is tightly attached to the inner side of the storage tank 3, filling the tank 3 with nitrogen. During oil storage, the oil enters the storage tank 3 through the oil inlet valve 12, and the first bladder 9 and the second bladder 10 retract upwards. During the oil intake process, the second bladder 10 remains tightly attached to the oil to reduce oil evaporation in the storage tank 3. During oil discharge, the computer 15 calculates the amount of nitrogen that needs to be introduced based on the weight of the discharged oil, and introduces it through the air inlet 4 and the air inlet valve 7. The oil is then discharged through the oil outlet valve 13. During the oil discharge process, the second bladder 10 remains tightly attached to the oil to keep it isolated from the atmosphere.

[0008] Compared with the prior art, the present invention provides a gas-pressurized diaphragm-type internal liquid-contact full floating plate device for storage tanks, which can effectively isolate the oil in the storage tank from the atmosphere through the diaphragm, thus meeting the needs of production and operation. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of the present invention.

[0010] Figure 2 This is a structural diagram before oil storage operations are carried out.

[0011] Figure 3 This is a schematic diagram of the structure during oil storage operations.

[0012] Figure 4 This is a schematic diagram of the structure during oil drainage. Detailed Implementation

[0013] The present invention will now be described in further detail with reference to the accompanying drawings.

[0014] Reference Figure 1A gas-pressurized diaphragm-type internal liquid-contact full floating roof device for storage tanks includes a foundation 1, a gravity sensor 2 installed inside the foundation 1, a storage tank 3 mounted above the gravity sensor 2, an air inlet 4 at the top of the storage tank 3, and a first fixed ring 5 and a second fixed ring 6 fixedly connected inside the storage tank 3. An air inlet valve 7 and a first air outlet valve 8 are distributed between the first fixed ring 5 and the second fixed ring 6. A first bladder 9 and a second bladder 10 are fixedly connected to the first fixed ring 5 and the second fixed ring 6, respectively. Nitrogen gas 11 at a pressure of 5 MPa is filled between the first bladder 9 and the second bladder 10. An oil inlet valve 12 and an oil outlet valve 13 are located at the bottom of the storage tank 3, and a second air outlet valve 14 is installed below the oil inlet valve 12. The gravity sensor 2 is connected to a computer 15.

[0015] Reference Figure 1 and Figure 2 Before carrying out oil storage work, the computer 15 is used to calculate the total weight of oil that can enter the storage tank 3, and the total amount of nitrogen that needs to be injected from the air inlet 4 and the air inlet valve 7 is calculated so that the first bladder 9 and the second bladder 10 can be expanded appropriately. The second bladder 10 is in close contact with the inner side of the storage tank 3 so that the inside of the storage tank 3 is filled with nitrogen.

[0016] Reference Figure 1 and Figure 3 When performing oil storage work, oil 16 enters storage tank 3 through oil inlet valve 12. The first bladder 9 and the second bladder 10 retract upwards. During the oil inlet process, the second bladder 10 always stays in close contact with the oil 16 to reduce the evaporation of oil in storage tank 3.

[0017] Reference Figure 1 and Figure 4 When performing oil drainage, the amount of nitrogen to be injected is calculated by computer 15 based on the weight of the drained oil. The nitrogen is injected through air inlet 4 and air inlet valve 7, and the oil is output through oil drain valve 13. During the oil drainage process, the second bladder 10 is always in close contact with the oil to keep the oil isolated from the atmosphere.

[0018] The working principle of this invention is as follows: First, preparations are made before oil storage. The computer 15 calculates the total weight of oil that can enter the storage tank 3, and converts this into the total amount of nitrogen that needs to be injected through the air inlet 4 and the air inlet valve 7. This ensures that the first bladder 9 and the second bladder 10 have appropriate expansion. The second bladder 10 is tightly attached to the inner side of the storage tank 3, filling the inside of the storage tank 3 with nitrogen. During oil storage, the oil enters the storage tank 3 through the oil inlet valve 12. The first bladder 9 and the second bladder 10 retract upwards. During the oil intake process, the second bladder 10 remains tightly attached to the oil to reduce oil evaporation in the storage tank 3. During oil discharge, the computer 15 calculates the amount of nitrogen that needs to be injected based on the weight of the discharged oil. This nitrogen is injected through the air inlet 4 and the air inlet valve 7, and the oil is discharged through the oil discharge valve 13. During the oil discharge process, the second bladder 10 remains tightly attached to the oil to keep the oil isolated from the atmosphere.

Claims

1. A gas-pressurized diaphragm-type internal liquid-contact full floating plate device for a storage tank, comprising a foundation (1), a gravity sensor (2) installed inside the foundation (1), a storage tank (3) installed on the upper side of the gravity sensor (2), an air inlet (4) installed on the top of the storage tank (3), a first fixed ring (5) and a second fixed ring (6) respectively fixedly connected inside the storage tank (3), and an air inlet valve (7) and a first fixed ring (8) distributed between the first fixed ring (5) and the second fixed ring (6). An exhaust valve (8) is provided; a first bladder (9) and a second bladder (10) are fixedly connected to the first fixed ring (5) and the second fixed ring (6), respectively; nitrogen gas (11) with a pressure of 5 MPa is filled between the first bladder (9) and the second bladder (10); the bottom of the storage tank (3) has an oil inlet valve (12) and an oil outlet valve (13), and a second exhaust valve (14) is installed on the lower side of the oil inlet valve (12); the gravity sensor (2) is connected to the computer (15).

2. The gas-pressurized diaphragm-type internal liquid-contact full-float device for storage tanks according to claim 1, characterized in that: Before carrying out oil storage work, the computer (15) is used to calculate the total weight of oil that can enter the storage tank (3), and the total amount of nitrogen that needs to be filled from the air inlet (4) and the air inlet valve (7) is calculated so that the first bladder (9) and the second bladder (10) can be expanded appropriately. The second bladder (10) is in close contact with the inner side of the storage tank (3) so that the inside of the storage tank (3) is filled with nitrogen.

3. The gas-pressurized diaphragm-type internal liquid-contact full floating plate device for storage tanks according to claim 1, characterized in that: When performing oil storage work, the oil (16) enters the storage tank (3) through the oil inlet valve (12). The first bladder (9) and the second bladder (10) retract upward. During the oil inlet process, the second bladder (10) always sticks tightly to the oil (16) to reduce the evaporation of oil in the storage tank (3).

4. The gas-pressurized diaphragm-type internal liquid-contact full floating plate device for storage tanks according to claim 1, characterized in that: When performing oil drainage, the amount of nitrogen to be injected is calculated by the computer (15) based on the weight of the drained oil. The nitrogen is injected through the air inlet (4) and the air inlet valve (7), and the oil is output through the drain valve (13). During the oil drainage process, the second bladder (10) is always in close contact with the oil to keep the oil isolated from the atmosphere.

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