A tank pressure balancing device for oil and gas storage tanks

Abstract

The present invention relates to a technical field of oil and gas storage, and specifically to a tank pressure balancing device for oil and gas storage tanks. It includes a water seal tank, the upper end of which is connected to the upper ends of multiple oil tanks through an inlet pipe, and is characterized by a pressure gauge and a flame arrester. The upper ends of multiple oil tanks are connected to an intake pipe, and multiple flame arresters are installed on the intake pipe. A vacuum tube connected to the intake pipe is fixed on the intake pipe, and the vacuum tube is connected to an adsorption and desorption device. A first one-way valve and a vacuum pump are installed on the vacuum tube. Multiple branch pipes connected to the intake pipe are fixed on the intake pipe, and the branch pipes are connected to the adsorption and desorption device. According to the present invention, when the pressure in the oil tank is high, the shut-off valve is closed, the second one-way valve is opened, and the first one-way valve is closed, so that the oil and gas enter the adsorption and desorption device, and the adsorption medium in the adsorption and desorption device is used to adsorb the oil and gas, thereby reducing the pressure in the oil tank.

Description

Technical Field

[0001] The invention relates to the technical field of oil and gas storage, and in particular to a tank pressure balancing device for an oil and gas storage tank. Background Art

[0002] At present, when collecting and distributing oil in oil and gas storage tanks, oil and gas will volatilize, resulting in breathing loss. The main method at present is to connect multiple storage tanks to increase the gas phase volume to reduce breathing loss. When the pressure in the tank is low, nitrogen will be added to maintain the tank pressure balance. This will increase the cost and the subsequent maintenance cost is high. In order to efficiently and economically reduce the breathing loss of oil storage tanks, it is necessary to manufacture a tank pressure balancing device for oil and gas storage tanks.

[0003] The flame arrester is a common safety device for oil and gas tank pressure balance devices. The flame arrester is generally composed of a flame arrester disc and a flame arrester shell. The flame arrester disc is mostly a corrugated plate structure and is the main component to prevent the spread of flames. In order to achieve efficient flame retardant performance, especially to prevent detonation flames, a thicker flame arrester disc is required, which will inevitably increase the resistance loss. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a tank pressure balancing device for oil and gas storage tanks which can avoid the oil and gas generated when the oil tank receives and sends oil from being discharged into the atmosphere, thereby causing waste, can simply and efficiently achieve real-time tank pressure balancing of multiple storage tanks, and also ensure the safe operation of the oil and gas storage tanks. In order to achieve the above purpose, the technical solution provided by the present invention is:

[0005] A tank pressure balancing device for oil and gas storage tanks comprises a water seal tank, the upper end of the water seal tank is connected with the upper ends of multiple oil tanks through an inlet pipe, a pressure gauge and a flame arrester are installed on the inlet pipe, the upper ends of multiple oil tanks are connected with an intake pipe, multiple flame arresters are installed on the intake pipe, a vacuum tube connected with the intake pipe is fixed on the intake pipe, the vacuum tube is connected with an adsorption and desorption device, a first one-way valve and a vacuum pump are installed on the vacuum tube, a second one-way valve is installed on the intake pipe, a plurality of branch pipes connected with the intake pipe are fixed on the intake pipe, and the branch pipes are connected with the adsorption and desorption device; the absorption The adsorption-desorption device comprises a processing tank, in which two sieve plates arranged up and down are fixed, the processing tank part between the two sieve plates forms a processing chamber, the processing chamber is filled with adsorption medium, a vacuum tube and a plurality of branch pipes are connected with the processing chamber, a guide piece corresponding to the branch pipe is fixed in the processing chamber, one end of the branch pipe in the processing chamber is located above the corresponding guide piece, and the plurality of guide pieces are staggered left and right in the height direction of the processing tank, the guide piece comprises a stainless steel plate, a plurality of vertical through pipes are arranged on the stainless steel plate, and a filter cloth is fixed on the upper end of the stainless steel plate.

[0006] The flame arrester includes a shell, a fire arrester disk is fixed in the shell, the inner cavity of the shell on one side of the fire arrester disk is a rectangular cavity, a first spring piece is arranged in the rectangular cavity, any two opposite ends of the first spring piece are fixedly connected to the rectangular cavity, the other two opposite ends of the first spring piece are in sliding contact with the rectangular cavity, the middle part of the first spring piece is curved in an arc shape away from one side of the fire arrester disk, a through hole is opened in the middle part of the first spring piece, a second spring piece is arranged on one side of the first spring piece, the first spring piece is located between the second spring piece and the fire arrester disk, one end of the second spring piece is fixedly connected to the first spring piece, when the first spring piece is deformed by the impact of the deflagration wave, the second spring piece blocks the through hole, and a plurality of pushing devices for pushing the deformed first spring piece to restore are arranged in the shell between the first spring piece and the fire arrester disk.

[0007] Specifically, the processing tank portion below the processing chamber is connected to the recovery tank through a recovery pipe, and a valve is installed on the recovery pipe.

[0008] Specifically, a cut-off valve is installed on the inlet pipe.

[0009] Specifically, medium water is stored in the water seal tank, the outlet end of the fuel gas inlet pipe is immersed in the medium water in the water seal tank, the inlet end of the fuel gas inlet pipe is connected to the outside of the water seal tank, and the fuel gas inlet pipe is fixedly and sealedly connected to the water seal tank.

[0010] Specifically, the adsorption medium is aluminum oxide.

[0011] Specifically, the adsorption medium is activated carbon.

[0012] Specifically, the pushing device is a cylinder, and there are two cylinders. The cylinder bodies of the two cylinders are fixed in the shell, and the two cylinders are symmetrically arranged according to the axis of the through hole.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] When the pressure in the oil tank is high, the shut-off valve is closed, the second one-way valve is opened, and the first one-way valve is closed, so that the oil and gas enter the adsorption and desorption device, and the adsorption medium in the adsorption and desorption device is used to adsorb the oil and gas, thereby reducing the pressure in the oil tank.

[0015] The adsorption-desorption device is also connected to the recovery tank through a recovery pipe, which increases the oil and gas storage space and avoids the waste caused by oil and gas discharge.

[0016] By installing multiple flame arresters, which have high fire-retardant performance and low pressure loss, safe separation between oil tanks and between oil tanks and adsorption and desorption devices is achieved, safety is guaranteed, and economic losses can be reduced in the event of a fire.

[0017] The oil tank pressure can be quickly and efficiently balanced by injecting fuel gas through a water seal tank, thus avoiding the breathing loss of the oil tank. The injection of fuel gas instead of nitrogen is economical and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention.

[0019] Figure 2 Schematic diagram of the internal structure of the adsorption-desorption device.

[0020] Figure 3 Schematic diagram of the internal structure of the flame arrester.

[0021] The names of the parts in the attached drawings are:

[0022] 1. Fuel gas inlet pipe; 2. Medium water; 3. Inlet pipe; 4. Shut-off valve; 5. Pressure gauge; 6. Oil tank; 7. Water seal tank; 8. Flame arrester; 9. Branch pipe; 10. Sieve plate; 11. First one-way valve; 12. Vacuum pump; 13. Vacuum tube; 14. Treatment tank; 15. Adsorption medium; 16. Recovery pipe; 17. Second one-way valve; 18. Inlet pipe; 19. Valve 20. Recovery tank; 21. Filter cloth; 22. Stainless steel plate; 23. Through pipe; 1.1. Shell; 2.1. Flame arrester disk; 3.1. First spring piece; 4.1. Through hole; 5.1. Second spring piece; 6.1. Cylinder. DETAILED DESCRIPTION

[0023] like Figure 1 As shown, a tank pressure balancing device for oil and gas storage tanks includes a water seal tank 7, in which medium water 2 is stored. The outlet end of the fuel gas inlet pipe 1 is immersed in the medium water 2 in the water seal tank 7, and the inlet end of the fuel gas inlet pipe 1 is connected to the outside of the water seal tank 7, and the fuel gas inlet pipe 1 is fixedly sealed and connected to the water seal tank 7. The upper end of the water seal tank 7 is connected to the upper ends of multiple oil tanks 6 through an inlet pipe 3. The inlet pipe 3 is equipped with a cut-off valve 4, a pressure gauge 5 and a flame arrester 8. The upper ends of multiple oil tanks 6 are connected to an intake pipe 18. A second one-way valve 17 is installed on the intake pipe 18, and multiple flame arresters 8 are installed on the intake pipe 18. A vacuum pipe 13 connected thereto is fixed on the intake pipe 18, and the vacuum pipe 13 is connected to the adsorption and desorption device. A first one-way valve 11 and a vacuum pump 12 are installed on the vacuum pipe 13. A plurality of branch pipes 9 connected thereto are fixed on the intake pipe 18, and the branch pipes 9 are connected to the adsorption and desorption device.

[0024] like Figure 2As shown, the adsorption and desorption device includes a processing tank 14. Two sieve plates 10 arranged up and down are fixed in the processing tank 14. The part of the processing tank 14 between the two sieve plates 10 forms a processing chamber. The processing chamber is filled with an adsorption medium 15, and the adsorption medium 15 is aluminum oxide or activated carbon. The adsorption medium 15 can adsorb oil and gas. When the adsorption and desorption device is in a negative pressure state, the oil and gas can be separated from the adsorption medium 15 and desorbed. When the vacuum tube 13 and multiple branch pipes 9 are connected to the processing chamber. A guide member corresponding to the branch pipe 9 is fixed in the processing chamber, and one end of the branch pipe 9 in the processing chamber is located above the corresponding guide member. Multiple guide members are staggered left and right in the height direction of the processing tank 14.

[0025] The guide member includes a stainless steel plate 22, on which a plurality of vertical through pipes 23 are arranged, a filter cloth 21 is fixed to the upper end of the stainless steel plate 22, and the processing tank 14 below the processing chamber is connected to the recovery tank 20 through a recovery pipe 16, on which a valve 19 is installed.

[0026] The pressure gauge 5 is connected to the oil tank 6 through the inlet pipe 3. When the pressure gauge 5 shows that the pressure value in the oil tank 6 is normal, the shut-off valve 4, the first one-way valve 11 and the second one-way valve 17 are in a closed state.

[0027] When the pressure gauge 5 shows that the pressure in the oil tank 6 is too high, the second one-way valve 17 and the valve 19 are opened, and the air inlet pipe 18 is connected to the processing chamber of the processing tank 14 through multiple branch pipes 9. The oil and gas enter the processing chamber, and through the adsorption effect of the adsorption medium 15, the adsorption medium 15 adsorbs part of the oil and gas, thereby relieving the oil and gas pressure in the oil tank 6. During the adsorption of the oil and gas by the adsorption medium 15, the oil and gas enter the processing chamber through multiple branch pipes 9. In the process of the oil and gas entering the processing chamber and moving into the recovery tank 20, a serpentine channel is formed in the processing chamber under the action of the staggered stainless steel plates 22. Therefore, the oil and gas entering the processing chamber and moving into the recovery tank 20 will move in the above-mentioned serpentine channel. A filter cloth 21 is set on the stainless steel plate 22. During the movement of the oil and gas in the serpentine channel, the oil and gas cannot pass through the through pipe 23 due to the blocking effect of the filter cloth 21, thereby ensuring that the oil and gas move in the serpentine channel, thereby increasing the contact time between the oil and gas and the adsorption medium 15, and improving the adsorption efficiency of the adsorption medium 15. After the valve 19 is opened, the processing tank 14 is connected to the recovery tank 20. By setting the recovery tank 20, part of the oil and gas can enter the recovery tank 20 through the recovery pipe 16, thereby increasing the storage space of the oil and gas.

[0028] When the pressure gauge 5 shows that the pressure value is too low, the first one-way valve 11 and the valve 19 are opened, and the second one-way valve 17 remains closed. Start the vacuum pump 12, and after vacuuming, the adsorption and desorption device enters the desorption state, and the oil and gas in the recovery tank 20 and the oil and gas separated from the adsorption medium 15 enter the oil tank 6 through the air inlet pipe 18, thereby compensating the pressure in the oil tank 6 and maintaining the pressure balance in the oil tank 6. During the desorption of oil and gas by the adsorption medium 15, negative pressure is generated in the processing tank 14, and the oil and gas can enter the through pipe 23 and pass through the filter cloth 21 to go up. During the desorption of the adsorption medium 15, the oil and gas desorbed from the adsorption medium 15 can go vertically upward in the processing tank 14, and the desorbed oil and gas do not need to go up in the above-mentioned serpentine channel, which can increase the desorbed oil and gas to quickly enter the oil tank 6 and compensate for the pressure of the oil tank 6.

[0029] After the set time, when the pressure of the oil tank 6 is still low, the shutoff valve 4 is opened to input the fuel gas through the fuel gas inlet pipe 1. After the fuel gas enters the water seal tank 7, it is washed by the medium water 2 in the water seal tank 7 and enters the oil tank 6 through the inlet pipe 3, thereby continuing to compensate for the pressure in the oil tank 6, thereby achieving the balance of the pressure in the oil tank 6 with high efficiency.

[0030] like Figure 3 As shown, the flame arrester 8 includes a shell 1.1. A fire arrester disk 2.1 is fixed in the shell 1.1, and the inner cavity of the shell 1.1 on one side of the fire arrester disk 2.1 is a rectangular cavity. A first spring clip 3.1 is arranged in the rectangular cavity, and any two opposite ends of the first spring clip 3.1 are fixedly connected to the rectangular cavity, and the other two opposite ends of the first spring clip 3.1 are in sliding contact with the rectangular cavity. The middle part of the first spring clip 3.1 is curved in an arc shape in a direction away from one side of the fire arrester disk 2.1. A through hole 4.1 is provided in the middle part of the first spring clip 3.1. A second spring clip 5.1 is arranged on one side of the first spring clip 3.1, and the first spring clip 3.1 is located between the second spring clip 5.1 and the fire arrester disk 2.1, and one end of the second spring clip 5.1 is fixedly connected to the first spring clip 3.1. When the first spring clip 3.1 is deformed by the impact of the deflagration wave, the second spring clip 5.1 blocks the through hole 4.1.

[0031] A plurality of pushing devices for pushing the deformed first spring piece 3.1 to restore the first spring piece 3.1 are arranged in the housing 1.1 between the first spring piece 3.1 and the fire-blocking disk 2.1. The pushing devices are cylinders 6.1, and there are two cylinders 6.1. The cylinder bodies of the two cylinders 6.1 are fixed in the housing 1.1, and the two cylinders 6.1 are symmetrically arranged according to the axis of the through hole 4.1.

[0032] Under normal circumstances, oil and gas are allowed to pass through the through hole 4.1 and the fire arrester disk 2.1. When the flame propagates in the pipeline in the form of deflagration, the gas in the pipeline will also be squeezed, generating a deflagration wave with a relatively high pressure. The deflagration wave enters the shell 1.1 of the flame arrester 8 and pushes the first spring piece 3.1 to deform, causing the middle part of the first spring piece 3.1 to deform in the direction of the fire arrester disk 2.1. After the first spring piece 3.1 is deformed, the second spring piece 5.1 will block the through hole 4.1 to prevent the flame from passing through. Even if a small amount of flame passes through during the fire arresting process, the setting of the fire arrester disk 2.1 can block the small amount of flame that passes through the through hole 4.1, thereby achieving the purpose of complete fire arresting.

[0033] After completing one fire arresting operation, when the flame arrester 8 needs to be used again, the two cylinders 6.1 are started at the same time, and the telescopic rods of the two cylinders 6.1 are used to push the first spring piece 3.1 to restore the first spring piece 3.1 to the initial state, so as to prepare for the next use.

[0034] In this embodiment, the upper and lower ends of the first spring piece 3.1 are fixedly connected to the upper and lower ends of the rectangular cavity, the middle part of the first spring piece 3.1 is curved toward the end away from the fire-blocking disk 2.1, and the front and rear ends of the first spring piece 3.1 are in sliding contact with the front and rear side walls of the rectangular cavity. The upper end of the second spring piece 5.1 is fixedly connected to the part of the first spring piece 3.1 above the through hole 4.1, and the lower end of the second spring piece 5.1 is curved toward the direction away from the fire-blocking disk 2.1. When the flame propagates in the form of deflagration in the pipeline, the gas in the pipeline will also be squeezed, generating a deflagration wave with a relatively high pressure. The deflagration wave enters the shell 1.1 of the flame arrester 8 and pushes the first spring piece 3.1 to bend and deform in the direction of the fire-blocking disk 2.1. After the deformation of the first spring piece 3.1 is completed, the second spring piece 5.1 will be attached to the first spring piece 3.1 and block the through hole 4.1, thereby achieving the purpose of fire prevention.

[0035] When the pressure in the oil tank 6 is high, the shutoff valve 4 is closed, the second one-way valve 17 is opened, and the first one-way valve 11 is closed, so that the oil and gas enter the adsorption and desorption device. The adsorption medium 15 in the adsorption and desorption device is used to adsorb the oil and gas, thereby reducing the pressure in the oil tank 6. The adsorption and desorption device is also connected to the recovery tank 20 through the recovery pipe 16, which increases the oil and gas storage space and avoids the waste caused by the emptying of oil and gas.

[0036] By installing multiple flame arresters 8, the flame arresters 8 have high flame retardancy and low pressure loss, and the safe separation between the oil tanks 6 and between the oil tanks 6 and the adsorption and desorption device is achieved, safety is guaranteed, and economic losses can be reduced in the event of a fire. The pressure of the oil tank 6 can be quickly and efficiently balanced by injecting fuel gas through the water seal tank 7, and the breathing loss of the oil tank 6 can be avoided. The injection of fuel gas instead of nitrogen is economical and efficient.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A tank pressure balancing device for oil and gas storage tanks, comprising a water seal tank (7), the upper end of the water seal tank (7) being connected to the upper ends of a plurality of oil tanks (6) through an inlet pipe (3), It is characterized in that The inlet pipe (3) is provided with a pressure gauge (5) and a flame arrester (8); the upper ends of the plurality of oil tanks (6) are connected to the air inlet pipe (18); the air inlet pipe (18) is provided with a plurality of flame arresters (8); the air inlet pipe (18) is provided with a vacuum pipe (13) connected thereto; the vacuum pipe (13) is connected to an adsorption and desorption device; the vacuum pipe (13) is provided with a first one-way valve (11) and a vacuum pump (12); the air inlet pipe (18) is provided with a second one-way valve (17); the air inlet pipe (18) is provided with a plurality of branch pipes (9) connected thereto; the branch pipes (9) are connected to the adsorption and desorption device; the adsorption and desorption device comprises a treatment tank (14); the treatment tank (14) 4) two sieve plates (10) arranged up and down are fixed inside, the processing tank (14) part between the two sieve plates (10) forms a processing chamber, the processing chamber is filled with an adsorption medium (15), the vacuum tube (13) and a plurality of branch pipes (9) are connected to the processing chamber, a guide piece corresponding to the branch pipe (9) is fixed inside the processing chamber, one end of the branch pipe (9) in the processing chamber is located above the corresponding guide piece, and the plurality of guide pieces are staggered left and right in the height direction of the processing tank (14), the guide piece comprises a stainless steel plate (22), a plurality of vertical through pipes (23) are arranged on the stainless steel plate (22), and a filter cloth (21) is fixed on the upper end of the stainless steel plate (22); the flame arrester (8) comprises a shell (1.1), a fire-blocking disk (2.1) is fixed in the shell (1.1), the inner cavity of the shell (1.1) on one side of the fire-blocking disk (2.1) is a rectangular cavity, a first spring piece (3.1) is arranged in the rectangular cavity, any two opposite ends of the first spring piece (3.1) are fixedly connected to the rectangular cavity, the other two opposite ends of the first spring piece (3.1) are in sliding contact with the rectangular cavity, the middle part of the first spring piece (3.1) is curved in an arc shape in a direction away from the side of the fire-blocking disk (2.1), a through hole (4.1) is opened in the middle part of the first spring piece (3.1), a second spring piece (5.1) is arranged on one side of the first spring piece (3.1), and the first spring piece (3.1) is located on the second spring piece (5.1) and the fire-blocking disk (2.1), one end of the second spring piece (5.1) is fixedly connected to the first spring piece (3.1), when the first spring piece (3.1) is deformed by the impact of the deflagration wave, the second spring piece (5.1) blocks the through hole (4.1), a plurality of pushing devices for pushing the deformed first spring piece (3.1) to restore the deformed first spring piece (3.1) are arranged in the housing (1.1) between the first spring piece (3.1) and the fire-blocking disk (2.1), the upper end of the second spring piece (5.1) is fixedly connected to the part of the first spring piece (3.1) above the through hole (4.1), and the lower end of the second spring piece (5.1) is curved in an arc shape in a direction away from the fire-blocking disk (2.1).

2. According to claim 1, a tank pressure balancing device for oil and gas storage tanks, It is characterized in that The processing tank (14) below the processing chamber is connected to the recovery tank (20) via a recovery pipe (16), and a valve (19) is installed on the recovery pipe (16).

3. According to the oil and gas storage tank pressure balancing device of claim 1, It is characterized in that A cut-off valve (4) is installed on the inlet pipe (3).

4. According to claim 1, a tank pressure balancing device for oil and gas storage tanks, It is characterized in that The water seal tank (7) stores medium water (2), the outlet end of the fuel gas inlet pipe (1) is immersed in the medium water (2) in the water seal tank (7), the inlet end of the fuel gas inlet pipe (1) is connected to the outside of the water seal tank (7), and the fuel gas inlet pipe (1) is fixedly sealed and connected to the water seal tank (7).

5. A tank pressure balancing device for oil and gas storage tanks according to any one of claims 1, 2, 3 and 4, It is characterized in that The adsorption medium (15) is aluminum oxide.

6. A tank pressure balancing device for oil and gas storage tanks according to any one of claims 1, 2, 3 and 4, It is characterized in that The adsorption medium (15) is activated carbon.

7. According to claim 1, a tank pressure balancing device for oil and gas storage tanks, It is characterized in that The pushing device is a cylinder (6.1), there are two cylinders (6.1), the cylinder bodies of the two cylinders (6.1) are fixed in the housing (1.1), and the two cylinders (6.1) are symmetrically arranged according to the axis of the through hole (4.1).

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