Flash steam benzene adsorption device and liquid storage tank thereof

Abstract

The utility model relates to the technical field of oil and gas field gas production processes, in particular to a flash steam benzene adsorption device and a liquid storage tank thereof. The adsorption device comprises a drainage pipe, one end of the drainage pipe is used for being connected with a breather valve of the liquid storage tank, and the other end of the drainage pipe is used for being connected with an emptying header pipe; an adsorption mechanism is arranged in the adsorption tank. Gas escaping from the liquid storage tank is led into the adsorption tank through the drainage pipe, benzene and benzene series in the gas are removed through the adsorption mechanism in the adsorption tank, and environmental pollution caused by direct emission is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of gas production technology in oil and gas fields, and particularly relates to a benzene adsorption device for flash steam and its liquid storage tank. Background Technique

[0002] After the natural gas produced at the gas well site undergoes the gas transmission process of "wellhead sand removal + heating throttling + separation and metering", it is gathered and transported to a natural gas treatment plant or directly enters the gas transmission main line and is transported to downstream well sites. Among them, the produced water from the gas well enters the sewage discharge main pipe through the drain valve skid after being discharged from the separator, and the sewage discharge from the venting and liquid separation tank also enters the steel sewage tank for storage through a pump. Since the sewage tank is not completely sealed, the gas in the tank flashes and escapes into the surrounding atmosphere. After detection, the content of benzene and benzene series (xylene, isopropylbenzene, styrene, etc.) in the flash steam is relatively high, and the benzene content at some detection points exceeds the standard. If the flash steam is not treated, it will have an impact on the environment.

[0003] Therefore, at present, a technical solution is needed to solve the technical problem that the content of benzene and benzene series in the gas escaping from the liquid storage tank is relatively high, and environmental pollution will be caused after being discharged through the breathing valve of the liquid storage tank. Content of the Utility Model

[0004] The purpose of the utility model is to overcome the technical problem that the content of benzene and benzene series in the gas escaping from the liquid storage tank is relatively high, and environmental pollution will be caused after being discharged through the breathing valve of the liquid storage tank, and provide a benzene adsorption device for flash steam and its liquid storage tank.

[0005] In the first aspect, the utility model provides a benzene adsorption device for flash steam, which includes a drainage pipe. One end of the drainage pipe is used to connect to the breathing valve of the liquid storage tank, and the other end is used to connect to the venting main pipe. An adsorption tank is arranged on the drainage pipe, and an adsorption mechanism is arranged inside the adsorption tank.

[0006] When the benzene adsorption device for flash steam of the utility model is in use, one end of the drainage pipe is connected to the breathing valve of the liquid storage tank. The gas containing benzene and benzene series escaping from the liquid storage tank enters the adsorption tank through the drainage pipe. After the benzene and benzene series in the gas are removed by the adsorption mechanism in the adsorption tank, it is introduced into the venting main pipe through the drainage pipe for venting treatment. On the one hand, it avoids the pollution caused by the direct discharge of benzene and benzene series, and on the other hand, it introduces the gas escaping from the liquid storage tank into the venting main pipe through the drainage pipe for discharge, avoiding environmental pollution around the liquid storage tank caused by other substances in the gas.

[0007] Preferably, the adsorption mechanism includes a partition net, which divides the internal space of the adsorption tank into upper and lower parts, and activated carbon is arranged on the partition net.

[0008] Activated carbon, due to its excellent pore structure and easily controllable surface chemical properties, can have a good adsorption effect on benzene and benzene derivatives. The activated carbon is loaded by setting a partition in the adsorption tank, thereby realizing the installation of activated carbon in the adsorption tank.

[0009] Preferably, an air intake pipe and an exhaust pipe are provided on the side wall of the adsorption tank, and the air intake pipe and the exhaust pipe are respectively connected to the drainage pipe, the air intake pipe is located below the partition net, and the exhaust pipe is located above the partition net.

[0010] The gas entering the adsorption tank has a tendency to flow upward. During the upward flow, the gas passes through the adsorption mechanism, thereby improving the gas purification efficiency.

[0011] Preferably, a first valve is provided on the air intake pipe, and a second valve is provided on the exhaust pipe.

[0012] When replacing the internal filler of the adsorption tank, the first valve and the second valve can be closed to reduce gas leakage.

[0013] Preferably, a discharge port is provided on the side wall of the adsorption tank, the discharge port is arranged at a height higher than the partition net on the adsorption tank, and the discharge port is provided with a sealing cover.

[0014] It is convenient to take out the activated carbon adsorbed with benzene and benzene derivatives for cleaning or replacement, which is beneficial to maintain the good adsorption capacity of the adsorption mechanism for benzene and benzene derivatives.

[0015] Preferably, a filling port is provided at the top of the adsorption tank, and an end cover is provided at the seasoning port.

[0016] It is convenient to add fillers into the adsorption tank from the filler port, making the operation easier.

[0017] Preferably, it also includes a base, which includes a rectangular frame, on which two horizontal plates are arranged side by side, each of which is connected to two vertical columns, and the vertical columns are connected to the bottom of the adsorption tank.

[0018] Since the adsorption tank is a newly added equipment around the liquid storage tank, if the adsorption tank is directly installed on the ground without planning its installation position, there will be problems such as instability, easy to tip over, and easy to be corroded by moisture. In this scheme, a base is added, and the base and the adsorption tank are connected by columns to achieve a suspended installation of the liquid storage tank, reducing the problem of moisture corrosion of the liquid storage tank. At the same time, the rectangular frame of the base provides a more stable support for the adsorption tank. In actual use, the rectangular frame and the ground are reinforced with bolts to ensure the stable installation of the adsorption tank.

[0019] Preferably, two support seats are provided on one side of the rectangular frame. The two support seats are located on both sides of the adsorption tank. The support seat includes a bottom plate and a top plate. The bottom plate is connected to the rectangular frame. A support rod is provided between the bottom plate and the top plate. The top plate is used to place the intake pipe or exhaust pipe of the adsorption tank.

[0020] The two support seats respectively support the intake pipe and the exhaust pipe on both sides of the adsorption tank, preventing the intake pipe and the exhaust pipe from being in a suspended state, enhancing their structural strength, and at the same time preventing the intake pipe and the exhaust pipe from directly contacting the ground, thus extending their service life.

[0021] Preferably, a T-shaped groove is provided on one side of the rectangular frame. A T-shaped slider nestedly connected with the T-shaped groove is provided at the bottom of the bottom plate. A limit bolt is provided on the bottom plate, and the limit bolt is used to tightly press against the bottom wall of the T-shaped groove.

[0022] The bottom plate can slide along the length direction of the T-shaped groove with the T-shaped slider, facilitating adjustment according to the specific positions of the intake pipe and the exhaust pipe during the installation process. After the adjustment is in place, rotate the limit bolt on the bottom plate. After the limit bolt presses downward against the bottom wall of the T-shaped groove, the relative fixation of the bottom plate and the rectangular frame is achieved.

[0023] A liquid storage tank includes a tank body. A breathing valve is provided at the top of the tank body. It also includes a flash steam benzene adsorption device as described above. The drainage pipe is connected to the breathing valve.

[0024] In the use of the liquid storage tank of the present utility model, the gas containing benzene and benzene series substances dissipated from the liquid storage tank enters the adsorption tank through the drainage pipe. After the benzene and benzene series substances in the gas are removed by the adsorption mechanism in the adsorption tank, it is introduced into the vent main pipe through the drainage pipe for venting treatment, avoiding environmental pollution around the liquid storage tank.

[0025] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0026] 1. The flash steam benzene adsorption device provided by the present utility model leads the gas dissipated from the liquid storage tank into the adsorption tank through the drainage pipe. In the adsorption tank, the benzene and benzene series substances in the gas are removed by the adsorption mechanism, avoiding environmental pollution caused by direct emission.

[0027] 2. The flash steam benzene adsorption device provided by the present utility model leads the gas from which benzene and benzene series substances have been removed into the vent main pipe through the drainage pipe for emission, avoiding environmental pollution around the liquid storage tank caused by other components in the gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic structural diagram of a flash steam benzene adsorption device of the present utility model;

[0029] Figure 2It is a structural schematic diagram of the rectangular frame of the utility model;

[0030] Figure 3 yes Figure 2 Middle AA section view;

[0031] Figure 4 It is a structural schematic diagram of the support seat of the utility model;

[0032] Figure 5 It is a structural schematic diagram of a liquid discharge tank of the utility model;

[0033] Markings in the figure:

[0034] 1- drainage pipe, 2- adsorption tank, 21- adsorption mechanism, 211- partition, 212- activated carbon, 22- air inlet pipe, 221- first valve, 23- exhaust pipe, 231- second valve, 24- discharge port, 241- sealing cover, 25- end cover, 26- column, 3- base, 31- rectangular frame, 311- horizontal plate, 312- T-slot, 32- support seat, 321- bottom plate, 3211- T-slider, 3212- limit bolt, 322- top plate, 323- support rod, 4- liquid storage tank, 5- vent main pipe. DETAILED DESCRIPTION

[0035] The present invention is further described in detail below in conjunction with specific embodiments. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0036] Unless otherwise specified, in the description of the specific embodiments of the present utility model, the expression terms indicating the orientation or position relationship such as "upper", "lower", "left", "right", "center", "inside", "outside", etc. are all based on the expression of the orientation or position relationship shown in the drawings, or the orientation or position relationship when the product / equipment / device of the utility model is usually used. These terms of orientation or position relationship are only for the convenience of describing the scheme of the utility model or simplifying the description in the specific embodiments, so that technicians can quickly understand the scheme, rather than indicating or implying that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation on the present utility model.

[0037] In addition, when 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 it 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 directions such as "horizontal", "vertical", "hanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the solution of the present utility model.

[0038] In addition, when expressions such as "first", "second", "third", etc. appear in the terms, they are only used to distinguish the description of the same or similar components, and should not be understood as emphasizing or implying the relative importance of specific components.

[0039] 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 a situation of more than 9.

[0040] In addition, in the description of the technical solution of the present utility model, unless otherwise clearly specified / defined / limited, when terms such as "set", "installed", "connected", "coupled", "provided with", "laid", "arranged" appear, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be connection means commonly used in the art such as welding, riveting, bolting, threaded connection, etc. Such a connection can be a mechanical connection, an electrical connection or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components.

[0041] Embodiment 1

[0042] As Figure 1 and Figure 5 shown, a flash steam benzene adsorption device includes a drainage pipe 1. One end of the drainage pipe 1 is used to connect the breathing valve 41 of the liquid storage tank, and the other end is used to connect the vent main pipe 5. An adsorption tank 2 is arranged on the drainage pipe 1, and an adsorption mechanism 21 is arranged in the adsorption tank 2.

[0043] During use, one end of the drainage pipe 1 is connected to the breathing valve 41 of the liquid storage tank. The gas containing benzene and benzene series escaping from the liquid storage tank enters the adsorption tank 2 through the drainage pipe 1. After the benzene and benzene series in the gas are removed by the adsorption mechanism 21 in the adsorption tank 2, it is introduced into the vent main pipe 5 through the drainage pipe 1 for venting treatment. On the one hand, it avoids the pollution caused by the direct emission of benzene and benzene series. On the other hand, the gas escaping from the liquid storage tank is introduced into the vent main pipe 5 through the drainage pipe 1 for emission, avoiding environmental pollution around the liquid storage tank caused by other substances in the gas.

[0044] Adsorption mechanism 21: The adsorption mechanism 21 includes a partition net 211. The partition net 211 divides the internal space of the adsorption tank 2 into upper and lower parts. Activated carbon 212 is arranged on the partition net 211. Due to its excellent pore structure and easily adjustable surface chemical properties, the activated carbon 212 can play a good adsorption role on benzene and benzene series. By arranging the partition net 211 in the adsorption tank 2 to load the activated carbon 212, the installation of the activated carbon 212 in the adsorption tank 2 is realized.

[0045] Adsorption tank 2: A discharge port 24 is provided on the side wall of the adsorption tank 2. The discharge port 24 is arranged above the partition net 211. The discharge port 24 is equipped with a sealing cover 241, which is convenient for taking out the activated carbon adsorbed with benzene and benzene series for cleaning or replacement, and is beneficial to maintaining the good adsorption capacity of the adsorption mechanism 21 for benzene and benzene series. A filler port is provided at the top of the adsorption tank 2. The filler port is equipped with an end cover 25, which is convenient for adding filler into the adsorption tank 2 from the filler port, and the operation is more convenient. An air inlet pipe 22 and an exhaust pipe 23 are provided on the side wall of the adsorption tank 2. The air inlet pipe 22 and the exhaust pipe 23 are respectively connected to the drainage pipe 1 to form a continuous passage. The air inlet pipe 22 is located below the partition net 211. The setting height of the discharge port 24 on the adsorption tank 2 is higher than the partition net 211. The gas entering the adsorption tank 2 has an upward flow trend. During the upward flow of the gas, it passes through the adsorption mechanism 21 to improve the gas purification efficiency. A first valve 221 is provided on the air inlet pipe 22, and a second valve 231 is provided on the exhaust pipe 23. When replacing the filler, the first valve 221 and the second valve 231 can be closed to reduce gas leakage.

[0046] Embodiment 2

[0047] As Figure 1 、 Figure 2 、 Figure 3 and Figure 4 shown, in this embodiment, the difference from Embodiment 1 is that it further includes a base 3. The base 3 includes a rectangular frame 31. Two cross plates 311 are arranged side by side on the rectangular frame 31. Two columns 26 are connected to each cross plate 311. The columns and the cross bars are connected by bolts or welded. The columns are welded to the bottom of the adsorption tank.

[0048] Since the adsorption tank 2 is a newly added device around the liquid storage tank, without planning its installation position, directly installing the adsorption tank 2 on the ground has problems such as being unstable, prone to tipping over, and susceptible to moisture corrosion. In this embodiment, by adding a base 3, the base 3 is connected to the adsorption tank 2 through a column 26, realizing the suspended installation of the liquid storage tank, reducing the moisture corrosion problem of the liquid storage tank. At the same time, the rectangular frame 31 of the base 3 provides a more stable supporting effect for the adsorption tank 2. In actual use, the rectangular frame 31 is reinforced with the ground through bolts to ensure the stable installation of the adsorption tank 2.

[0049] Furthermore, two support seats 32 are provided on one side of the rectangular frame 31. The two support seats 32 are located on both sides of the adsorption tank 2. The support seat 32 includes a bottom plate 321 and a top plate 322. The bottom plate 321 is connected to the rectangular frame 31. A support rod 323 is provided between the bottom plate 321 and the top plate 322. The top plate 323 is used to place the intake pipe 22 or the exhaust pipe 23 of the adsorption tank 2. The two support seats 32 respectively support the intake pipe 22 and the exhaust pipe 23 on both sides of the adsorption tank 2, avoiding the intake pipe 22 and the exhaust pipe 23 from being in a suspended state, improving their structural strength, and at the same time avoiding the intake pipe 22 and the exhaust pipe 23 from directly contacting the ground and extending their service life.

[0050] Furthermore, a T-shaped groove 312 is provided on one side of the rectangular frame 31. When in normal use, the T-shaped groove 312 is in an inverted T shape. A T-shaped slider 3211 nestedly connected to the T-shaped groove 312 is provided at the bottom of the bottom plate 321. A limit bolt 3212 is provided on the bottom plate 321. The limit bolt 3212 is used to press tightly against the bottom wall of the T-shaped groove 312. The bottom plate 321 can slide along the length direction of the T-shaped groove 312 with the T-shaped slider 3211, facilitating adjustment according to the specific positions of the intake pipe 22 and the exhaust pipe 23 during the installation process. After the adjustment is in place, rotate the limit bolt 3212 on the bottom plate 321. After the limit bolt 3212 presses down tightly against the bottom wall of the T-shaped groove 312, the relative fixation of the bottom plate 321 and the rectangular frame 31 is achieved.

[0051] Embodiment 3

[0052] As Figure 1 and Figure 5 shown, in this embodiment, a liquid storage tank is provided, including a tank body 4. A breather valve 41 is provided at the top of the tank body 4. It also includes a flash steam benzene adsorption device as described in Embodiment 1 or Embodiment 2. The diversion pipe 1 is connected to the breather valve 41.

[0053] During use, the gas containing benzene and benzene series emitted from the liquid storage tank enters the adsorption tank 2 through the drainage pipe 1. After the benzene and benzene series in the gas are removed by the adsorption mechanism 21 in the adsorption tank 2, it is introduced into the vent main pipe 5 through the drainage pipe 1 for venting treatment, so as to avoid environmental pollution around the liquid storage tank.

[0054] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A flash benzene adsorption device, characterized in that: The invention comprises a drainage tube (1), one end of which is used to connect to a breathing valve (41) of a liquid storage tank, and the other end of which is used to connect to a main venting pipe (5). An adsorption tank (2) is arranged on the drainage tube (1), and an adsorption mechanism (21) is arranged inside the adsorption tank (2).

2. A flash benzene adsorption device according to claim 1, characterized in that: The adsorption mechanism (21) comprises a partition net (211), wherein the partition net (211) divides the internal space of the adsorption tank (2) into two upper and lower parts, and activated carbon (212) is arranged on the partition net (211).

3. A flash benzene adsorption device according to claim 2, characterized in that: An air intake pipe (22) and an exhaust pipe (23) are provided on the side wall of the adsorption tank (2); the air intake pipe (22) and the exhaust pipe (23) are respectively connected to the drainage pipe (1); the air intake pipe (22) is located below the partition net (211), and the exhaust pipe (23) is located above the partition net (211).

4. A flash benzene adsorption device according to claim 3, characterized in that: The air intake pipe (22) is provided with a first valve (221), and the air exhaust pipe (23) is provided with a second valve (231).

5. A flash benzene adsorption device according to claim 2, characterized in that: The side wall of the adsorption tank (2) is provided with a discharge port (24); the height of the discharge port (24) on the adsorption tank (2) is higher than the partition net (211); and the discharge port (24) is provided with a sealing cover (241).

6. A flash benzene adsorption device according to claim 1, characterized in that: The top of the adsorption tank (2) is provided with a filling port, and the filling port is provided with an end cover (25).

7. A flash benzene adsorption device according to any one of claims 1 to 6, characterized in that: It also comprises a base (3), the base (3) comprising a rectangular frame (31), two horizontal plates (311) are arranged side by side on the rectangular frame (31), each of the horizontal plates (311) is connected to two upright posts (26), and the upright posts (26) are connected to the bottom of the adsorption tank (2).

8. A flash benzene adsorption device according to claim 7, characterized in that: Two support seats (32) are provided on one side of the rectangular frame (31), and the two support seats (32) are located on both sides of the adsorption tank (2). The support seat (32) comprises a bottom plate (321) and a top plate (322), and the bottom plate (321) is connected to the rectangular frame (31). A support rod (323) is provided between the bottom plate (321) and the top plate (322), and the top plate (322) is used to place an air intake pipe (22) or an air exhaust pipe (23) of the adsorption tank (2).

9. A flash benzene adsorption device according to claim 8, characterized in that: A T-shaped slot (312) is provided on one side of the rectangular frame (31), a T-shaped sliding block (3211) nested and connected to the T-shaped slot (312) is provided at the bottom of the bottom plate (321), and a limiting bolt (3212) is provided on the bottom plate (321), and the limiting bolt (3212) is used to tighten against the bottom wall of the T-shaped slot (312).

10. A liquid storage tank, comprising a tank body (4), wherein a breathing valve (41) is provided on the top of the tank body (4), characterized in that: It also comprises a flash steam benzene adsorption device as claimed in any one of claims 1 to 9, wherein the drainage pipe (1) is connected to the breathing valve (41).

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