Storage tank system with gas phase recovery treatment function

Abstract

The utility model relates to the technical field of storage tank pressure stabilization, in particular to a storage tank system with a gas phase recovery treatment function, which comprises a storage tank body and is provided with a gas phase pipeline, and the gas phase pipeline is provided with a self-operated pressure regulating valve; the gas supply pipeline comprises an inlet pipeline, a Venturi jet flow mechanism and an outlet pipeline which are communicated in sequence, the gas phase pipeline is communicated with the Venturi jet flow mechanism, and the gas pressure of the inlet pipeline is larger than that of the gas phase pipeline. The gas flow flowing at a high speed in the gas supply pipeline adsorbs the gas in the storage tank body at the Venturi jet mechanism, so that the light component separated out of the storage tank body and the gas flow in the gas supply pipeline are mixed and output for use, the light component separated out of the storage tank body is recycled, environmental pollution and resource waste are avoided, the treatment cost is low, and the treatment effect is good. Meanwhile, the self-operated pressure regulating valve is arranged on the gas phase pipeline, automatic opening or closing action can be carried out according to the pressure condition in the storage tank body, and the pressure in the storage tank body is kept stable.

Description

Technical Field

[0001] The utility model relates to the technical field of storage tank pressure stabilization, and particularly relates to a storage tank system with gas phase recovery treatment. Background Art

[0002] Crude oil is generally stored in low-pressure crude oil storage tanks. During the storage process, some light components in the crude oil will overflow into gas phase, resulting in an increase in the pressure of the storage tank. Currently, most crude oil storage tanks use installed breather valves to achieve the purpose of stabilizing the pressure of the storage tank. This causes environmental pollution and waste of resources, and also leads to relatively large fluctuations in the pressure of the storage tank. If the storage tank is modified to recover the gas phase precipitated from the crude oil by adding a dedicated gas recovery mechanism, the total amount of precipitated gas is relatively small, and problems such as high transformation cost and operation cost will be faced. Content of the Utility Model

[0003] The purpose of the utility model is to overcome the deficiencies in the prior art that the light components precipitated in the existing crude oil storage tanks affect the pressure stability of the storage tank, and the recovery cost is relatively high, resulting in environmental pollution and waste of resources, and to provide a storage tank system with gas phase recovery treatment.

[0004] The utility model provides a storage tank system with gas phase recovery treatment, including

[0005] A storage tank body is provided with a gas phase pipeline, and a self-operated pressure regulating valve is arranged on the gas phase pipeline;

[0006] A gas supply pipeline includes an inlet pipeline, a Venturi jet mechanism, and an outlet pipeline that are connected in sequence. The gas phase pipeline is connected to the Venturi jet mechanism, and the air pressure of the inlet pipeline is greater than the air pressure of the gas phase pipeline.

[0007] In the storage tank system with gas phase recovery treatment of the utility model, by connecting the storage tank body to the gas supply pipeline provided with a Venturi jet mechanism through the gas phase pipeline, the high-speed flowing air flow in the gas supply pipeline generates an adsorption effect on the gas in the storage tank body at the Venturi jet mechanism, so that the light components precipitated in the storage tank body are mixed with the air flow in the gas supply pipeline and output for use, realizing the recovery of the light components precipitated in the storage tank body, avoiding environmental pollution and waste of resources, and having a relatively low treatment cost. At the same time, by arranging a self-operated pressure regulating valve on the gas phase pipeline, automatic opening or closing actions can be carried out according to the pressure condition in the storage tank body, so that the pressure in the storage tank body is maintained stable.

[0008] Preferably, the gas pipeline is further provided with a first switching valve and a first check valve, and the self-operated pressure regulating valve is arranged between the first switching valve and the first check valve. The first switching valve is used to control the connection state between the storage tank body and the gas supply pipeline, the first check valve is used to control the gas flow in the gas pipeline to only flow from the storage tank body towards the gas supply pipeline, and the self-operated pressure regulating valve is arranged between the first switching valve and the first check valve, which can achieve pressure stability under the normal connection state between the storage tank body and the gas supply pipeline.

[0009] Preferably, the storage tank body is further provided with a vent pipeline. It enables the gas in the storage tank body to be vented or recovered according to actual conditions, improves the safety of crude oil storage, and avoids overpressure hazards.

[0010] Preferably, the vent pipeline is connected to the gas pipeline, and the connection position between the vent pipeline and the gas pipeline is located between the storage tank body and the first switching valve. This reduces the number of openings on the storage tank body, enabling the gas separated from the storage tank body to be vented or enter the gas supply pipeline for recycling.

[0011] Preferably, the storage tank body is further provided with a pressure relief pipeline, the pressure relief pipeline is connected to the vent pipeline, and the pressure relief pipeline is provided with a blasting mechanism. This further eliminates the danger of sudden overpressure in the storage tank body through the blasting mechanism and improves the safety of crude oil storage.

[0012] Preferably, the inlet pipeline is provided with a second switching valve and a second check valve. The second switching valve is used to control the conduction state of the inlet pipeline, and the second check valve is used to ensure the flow direction of the gas flow in the gas supply pipeline.

[0013] Preferably, the outlet pipeline is provided with a third switching valve and a third check valve. The third switching valve is used to control the conduction state of the outlet pipeline, and the third check valve is used to ensure the flow direction of the gas flow in the gas supply pipeline.

[0014] Preferably, the outlet pipeline is further provided with a separator, and the separator is arranged on the output side of the third check valve. The output gas flow is further separated through the separator to remove liquids, impurities, etc., so that the gas can be directly used where needed.

[0015] Preferably, the gas supply pipeline includes a fuel gas pipeline, and the fuel gas pipeline is used to supply fuel gas. This enables the light components separated from the storage tank body to be transported together with the fuel gas, and realizes the low-cost recycling of light components by using the existing pipeline.

[0016] Preferably, the gas supply pipeline is connected to the crude oil three-phase separation mechanism and / or the crude oil flash evaporation treatment mechanism. The high-pressure gas flow generated during the crude oil three-phase separation process and the flash evaporation process is used to recover the light components precipitated in the storage tank body, and the existing pipeline is utilized to achieve the low-cost recovery and utilization of the light components.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] 1. The present utility model provides a storage tank system with gas phase recovery treatment. By connecting the storage tank body to the gas supply pipeline provided with a Venturi jet mechanism through a gas phase pipeline, the high-speed gas flow in the gas supply pipeline generates an adsorption effect on the gas in the storage tank body at the Venturi jet mechanism, enabling the light components precipitated in the storage tank body to be mixed with the gas flow in the gas supply pipeline for output and use, realizing the recovery of the light components precipitated in the storage tank body, avoiding environmental pollution and resource waste, and having a relatively low treatment cost.

[0019] 2. The present utility model provides a storage tank system with gas phase recovery treatment. By providing a self-acting pressure regulating valve on the gas phase pipeline, automatic opening or closing actions can be performed according to the pressure condition in the storage tank body, realizing the stable maintenance of the pressure in the storage tank body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Structural schematic diagram of a storage tank system with gas phase recovery treatment for Embodiment 1 Figure 1 ;

[0021] Figure 2 Structural schematic diagram of a storage tank system with gas phase recovery treatment for Embodiment 1 Figure 2 ;

[0022] Figure 3 Structural schematic diagram of a storage tank system with gas phase recovery treatment for Embodiment 1 Figure 3 ;

[0023] Reference numerals in the drawings:

[0024] 1 - Storage tank body, 2 - Gas phase pipeline, 21 - Self-acting pressure regulating valve, 22 - First shut-off valve, 23 - First check valve, 3 - Gas supply pipeline, 31 - Inlet pipeline, 311 - Second shut-off valve, 312 - Second check valve, 32 - Venturi jet mechanism, 33 - Outlet pipeline, 331 - Third shut-off valve, 332 - Third check valve, 4 - Venting pipeline, 5 - Pressure relief pipeline, 51 - Blasting mechanism, 6 - Separator, 7 - Crude oil three-phase separation mechanism, 8 - Crude oil flash evaporation treatment mechanism. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The present utility model will be further described in detail below in conjunction with specific embodiments. However, this should not be construed as limiting the scope of the above-mentioned subject matter of the present utility model to the following embodiments. Any technology implemented based on the content of the present utility model belongs to the scope of the present utility model.

[0026] Unless otherwise specified, in the description of the specific embodiments of the present utility model, the expression terms indicating the orientation or positional relationship such as "upper", "lower", "left", "right", "center", "inner", "outer", etc. are all based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the utility model product / device / equipment is habitually used. These terms of orientation or positional relationship are only for the convenience of describing the solution of the present utility model or simplifying the description in the specific embodiments, so as to facilitate technicians to quickly understand the solution, rather than indicating or implying that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, it should not be construed as a limitation to the present utility model.

[0027] In addition, if terms such as "horizontal", "vertical", "hanging", "parallel" appear, it does not mean that the corresponding device / component / element is required to be absolutely horizontal or vertical or hanging or parallel, but it can be slightly inclined or have a deviation. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but it can be slightly inclined. Or, it can be simply understood that the corresponding device / component / element is arranged in the directions of "horizontal", "vertical", "hanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still play its role in the solution of the present utility model.

[0028] In addition, the expressions such as "first", "second", "third", etc. in the terms are only used to distinguish the description of the same or similar components, and should not be construed as emphasizing or implying the relative importance of specific components.

[0029] In addition, in the description of the embodiments of the present utility model, "several", "multiple", "a number of" represent at least 2. It can be any situation such as 2, 3, 4, 5, 6, 7, 8, 9, etc., and even can be more than 9.

[0030] In addition, in the description of the technical solution of the utility model, unless otherwise clearly specified / defined / restricted, the terms "set", "install", "connect", "connected", "provided with", "laid", and "arranged" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection, and can be a connection method commonly used in the field such as welding, riveting, bolting, and threaded connection. This connection can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be a connection between the two components.

[0031] Example 1

[0032] If Figure 1 As shown, a storage tank system with gas phase recovery treatment includes a storage tank body 1 and a gas supply pipeline 3. The storage tank body 1 is provided with a gas phase pipeline 2, and the gas phase pipeline 2 is provided with a self-operated pressure regulating valve 21. The gas supply pipeline 3 includes an inlet pipeline 31, a venturi jet mechanism 32 and an outlet pipeline 33 which are connected in sequence. The inlet pipeline 31 is connected to the high-pressure inlet of the venturi jet mechanism 32, and the gas phase pipeline 2 is connected to the low-pressure inlet of the venturi jet mechanism 32. The inlet pipeline 31 and the outlet pipeline 33 are connected along the airflow direction, and the air pressure of the inlet pipeline 31 is greater than the air pressure of the gas phase pipeline 2.

[0033] A storage tank system with gas phase recovery and treatment in this embodiment connects the storage tank body 1 to the gas supply pipeline 3 provided with the Venturi jet mechanism 32 through the gas phase pipeline 2. The inlet pipeline 31 with higher pressure inputs airflow into the Venturi jet mechanism 32 as a driving gas source, and generates supersonic airflow through the Lafarge nozzle, and generates low pressure near the high-speed airflow, which produces an adsorption effect, so that the light component airflow with lower pressure input from the gas phase pipeline 2 is entrained and sucked into the mixing chamber of the Venturi jet mechanism 32, and becomes a mixed gas with a certain speed and pressure, and then enters the diffusion section of the Venturi jet mechanism 32, where the speed gradually decreases, and finally the mixed gas with a pressure between the inlet pipeline 31 and the gas phase pipeline 2 is discharged through the outlet pipeline 33, so as to realize the pressurized recovery of the light components precipitated in the storage tank body 1, avoid environmental pollution and waste of resources, and have a low processing cost.

[0034] In an optional embodiment, the self-operated pressure regulating valve 21 switches according to the pressure change in the storage tank body 1. When the pressure in the storage tank body 1 rises to a certain value, it automatically opens to connect the storage tank body 1 with the venturi jet mechanism 32, so as to realize the pressurized recovery of the light components precipitated in the storage tank body 1. When the pressure in the storage tank body 1 drops to a certain value, it automatically closes to maintain the stability of the pressure in the storage tank body 1.

[0035] In an alternative embodiment, the gas pipeline 2 is further provided with a first on-off valve 22 and a first check valve 23, and the self-operated pressure regulating valve 21 is arranged between the first on-off valve 22 and the first check valve 23. The first on-off valve 22 is used to control the connection state between the storage tank body 1 and the gas supply pipeline 3, the first check valve 23 is used to control the air flow in the gas pipeline 2 to only flow from the storage tank body 1 towards the gas supply pipeline 3, and the self-operated pressure regulating valve 21 is arranged between the first on-off valve 22 and the first check valve 23, capable of achieving pressure stability in the normal connection state between the storage tank body 1 and the gas supply pipeline 3.

[0036] In one or several embodiments, the storage tank body 1 is further provided with a vent pipeline 4. The vent pipeline 4 is an existing structure and is used for discharging the gas in the storage tank body 1 to the air, enabling the selection of discharging or recovering the gas in the storage tank body 1 according to the actual situation, improving the safety of crude oil storage, and avoiding overpressure danger when a failure occurs in the relevant recovery pipeline.

[0037] In an alternative embodiment, the vent pipeline 4 is connected to the gas pipeline 2, and the connection position between the vent pipeline 4 and the gas pipeline 2 is located between the storage tank body 1 and the first on-off valve 22. This reduces the number of openings on the storage tank body 1, enabling the gas separated from the storage tank body 1 to be selectively vented or enter the gas supply pipeline 3 for recycling.

[0038] In one or several embodiments, the storage tank body 1 is further provided with a pressure relief pipeline 5. The pressure relief pipeline 5 is connected to the vent pipeline 4, and the pressure relief pipeline 5 is provided with a blasting mechanism 51. This further eliminates the danger of the sudden overpressure state of the storage tank body 1 through the blasting mechanism 51, improving the safety of crude oil storage.

[0039] In an alternative embodiment, the blasting mechanism 51 may include a rupture disc.

[0040] In an alternative embodiment, the inlet pipeline 31 is provided with a second on-off valve 311 and a second check valve 312, and the outlet pipeline 33 is provided with a third on-off valve 331 and a third check valve 332. The second on-off valve 311 is used to control the conduction state of the inlet pipeline 31, the second check valve 312 is used to ensure the flow direction of the air flow in the gas supply pipeline 3, the third on-off valve 331 is used to control the conduction state of the outlet pipeline 33, and the third check valve 332 is used to ensure the flow direction of the air flow in the gas supply pipeline 3.

[0041] In an alternative embodiment, the first on-off valve 22, the second on-off valve 311, and the third on-off valve 331 may all be globe valves, and the valves on each pipeline and pipeline can be increased, decreased, and adjusted according to the actual situation.

[0042] In one or several embodiments, such as Figure 2As shown, the gas supply pipeline 3 includes a fuel gas pipeline, which is used to supply fuel gas. The light components separated from the storage tank body 1 can be transported together with the fuel gas, and the low-cost recycling of the light components is realized by using the existing pipeline.

[0043] Generally, boilers, jacketed furnaces, etc. that use fuel gas combustion for heating will be set up in crude oil production sites or crude oil treatment stations to heat water or generate steam, insulate the pipeline, and prevent crude oil from solidifying. The fuel gas is transported through the fuel gas pipeline, and generally has a relatively high pressure and needs to be regulated before use. In this technical solution, by using the existing fuel gas pipeline as the gas supply pipeline 3, only the fuel gas pipeline recycles the gas of the light components separated from the storage tank body 1. This not only realizes the pressure regulation of the fuel gas in the fuel gas pipeline, reduces the pressure regulation difficulty of the fuel gas pipeline itself, but also realizes the pressurized recovery of the gas separated from the storage tank body 1, which is convenient for recycling, reduces the gas recovery difficulty, and realizes the pressure stability of the storage tank system.

[0044] In an optional embodiment, a separator 6 is further provided on the outlet pipeline 33. The separator 6 is arranged on the output side of the third check valve 332. The output air flow is further separated and processed by the separator 6 to remove liquids, impurities, etc., so that the gas can be directly used where it is needed.

[0045] In an optional embodiment, the separator 6 can be a liquid separation tank, which is used to remove the liquid generated due to the temperature reduction in the storage tank body 1 or the fuel gas, so as to avoid the liquid affecting the normal combustion of the fuel gas.

[0046] In one or several embodiments, as Figure 3 shown, the gas supply pipeline 3 is connected to the crude oil three-phase separation mechanism 7 and / or the crude oil flash treatment mechanism 8. The high-pressure air flow generated by the crude oil three-phase separation process and the flash process is used to recover and process the light components separated from the storage tank body 1, and the low-cost recycling of the light components is realized by using the existing pipeline.

[0047] The crude oil three-phase separation mechanism 7 is generally a crude oil three-phase separation tank, which is used to separate oil, gas and water from the produced crude oil. The gas phase pressure therein is relatively high and can be directly exported for use or used as fuel gas after treatment. In this technical solution, by using the existing crude oil three-phase separation mechanism 7 to provide the driving gas source, the low-cost recycling of the gas containing light components separated from the storage tank body 1 is realized.

[0048] The crude oil flash treatment mechanism 8 is generally a crude oil flash tank. After the high-pressure crude oil is input into the flash tank, saturated steam is generated due to the pressure reduction. The crude oil after flash stabilization can be transported to the crude oil storage tank for storage. In this technical solution, by using the saturated steam flow generated by the flash process to increase the driving gas source, the low-cost recycling of the gas containing light components separated from the storage tank body 1 is realized.

[0049] In an alternative embodiment, the storage tank body 1 can be connected to any one of the crude oil three-phase separation tank and the crude oil flash tank through different pipelines or switchable pipelines, so as to provide a driving gas source through different structures, realize the low-cost recovery of the gas precipitated in the storage tank body 1, and maintain the stability of the pressure in the storage tank body 1.

[0050] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A storage tank system with gas phase recovery treatment, characterized in that: include The storage tank body (1) is provided with a gas phase pipeline (2), and the gas phase pipeline (2) is provided with a self-operated pressure regulating valve (21); The gas supply pipeline (3) comprises an inlet pipeline (31), a venturi jet mechanism (32) and an outlet pipeline (33) which are connected in sequence, the gas phase pipeline (2) is connected to the venturi jet mechanism (32), and the gas pressure of the inlet pipeline (31) is greater than the gas pressure of the gas phase pipeline (2).

2. A storage tank system with gas phase recovery treatment according to claim 1, characterized in that: The gas phase pipeline (2) is further provided with a first switch valve (22) and a first check valve (23), and the self-operated pressure regulating valve (21) is arranged between the first switch valve (22) and the first check valve (23).

3. A storage tank system with gas phase recovery treatment according to claim 2, characterized in that: The storage tank body (1) is also provided with a venting pipeline (4).

4. A storage tank system with gas phase recovery treatment according to claim 3, characterized in that: The venting pipeline (4) is connected to the gas phase pipeline (2), and the connecting position of the venting pipeline (4) and the gas phase pipeline (2) is located between the storage tank body (1) and the first switch valve (22).

5. A storage tank system with gas phase recovery treatment according to claim 4, characterized in that: The storage tank body (1) is also provided with a pressure relief pipeline (5), the pressure relief pipeline (5) is in communication with the venting pipeline (4), and the pressure relief pipeline (5) is provided with a blasting mechanism (51).

6. A storage tank system with gas phase recovery treatment according to claim 5, characterized in that: The inlet pipeline (31) is provided with a second switch valve (311) and a second check valve (312).

7. A storage tank system with gas phase recovery treatment according to claim 6, characterized in that: The outlet pipeline (33) is provided with a third switch valve (331) and a third check valve (332).

8. A storage tank system with gas phase recovery treatment according to claim 7, characterized in that: The outlet pipeline (33) is further provided with a separator (6), and the separator (6) is arranged on the output side of the third check valve (332).

9. A storage tank system with gas phase recovery processing according to any one of claims 1 to 8, characterized in that: The gas supply pipeline (3) comprises a fuel gas pipeline, and the fuel gas pipeline is used to provide fuel gas.

10. A storage tank system with gas phase recovery processing according to any one of claims 1 to 8, characterized in that: The gas supply pipeline (3) is connected to a crude oil three-phase separation mechanism (7) and / or a crude oil flash treatment mechanism (8).

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