Two-phase separation device for high-sulfur gas field

Abstract

The utility model relates to the field of gas field equipment, in particular to a high sulfur gas field two-phase separation device which comprises a separator, the separator comprises a gas-liquid inlet end, an exhaust port is formed in the top of the separator, a two-phase separation part is arranged in the separator, one end of the two-phase separation part is communicated with the gas-liquid inlet end, and the other end of the two-phase separation part is communicated with the exhaust port. The two-phase separation part comprises a plurality of sub-separation parts, the sub-separation parts divide the two-phase separation part into a plurality of flat spaces, a TP plate set is arranged in the two-phase separation part, the sub-separation parts are located at the end, close to the exhaust port, of the two-phase separation part, and the TP plate set is located at the end, close to the gas-liquid inlet end, of the two-phase separation part; the liquid outlet is located in the lower area of the TP plate set and communicated with the two-phase separation part, so that the gas-liquid mixture can be condensed into water drops in the flat space, the water drops sink due to the dead weight, gas with the water drops separated out rises and is discharged from the exhaust port, two-phase separation is achieved, and the separation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of gas field equipment, and particularly relates to a two-phase separation device for a high-sulfur gas field. Background Art

[0002] With the continuous development of high-sulfur gas fields at home and abroad, most gas fields adopt the process of transporting wet raw gas to the purification plant for centralized desulfurization and dehydration treatment. During the gathering and transportation process, there is often a situation of local accumulation of free water in metal pipelines. The existence of free water brings great risks to the safe and stable operation of pipelines:

[0003] The local accumulation of free water will reduce the transportation capacity of natural gas in the pipeline, resulting in an increase in the pressure difference between the starting end and the ending end of the pipeline; it may form hydrates, causing pipeline blockage and even pipeline burst; the existence of free water will cause electrochemical corrosion of metal pipelines, and in the case of not being treated in time, it may cause corrosion perforation of metal pipelines, and finally cause hydrogen sulfide leakage.

[0004] Existing gas fields mostly adopt the "improved all-wet gas heating and insulation mixed transportation process", that is, gas-liquid separation is carried out through a field water separator, a multiphase flow separator or a production separator, and the separation element is a wire mesh demister. However, during the operation of the wire mesh demister, it is found that the wire mesh demister is extremely prone to plugging by elemental sulfur, resulting in a large pressure difference on both sides of the wire mesh demister, affecting the normal operation of the equipment. And when the pressure difference reaches a certain value, the wire mesh demister is damaged and enters the sewage pipeline, affecting sewage transportation. The on-site application effect is not ideal, resulting in poor separation effect and low separation efficiency. Summary of the Utility Model

[0005] The purpose of the utility model is to overcome the problem that the existing sulfur-containing gas fields mostly adopt wire mesh demisters, resulting in poor separation efficiency, and provide a two-phase separation device for a high-sulfur gas field.

[0006] In a first aspect, the utility model provides a two-phase separation device for a high-sulfur gas field. The separation device includes a separator. The separator includes a gas-liquid inlet end. An exhaust port is provided at the top of the separator. A two-phase separation part is provided inside the separator. One end of the two-phase separation part is communicated with the gas-liquid inlet end. The two-phase separation part is provided with a plurality of sub-separation parts. The sub-separation parts divide the two-phase separation part into a plurality of flat spaces. A TP plate group is provided inside the two-phase separation part. The sub-separation parts are located at one end of the two-phase separation part close to the exhaust port. The TP plate group is located at one end of the two-phase separation part close to the gas-liquid inlet end. A liquid discharge port is provided on the separator. The liquid discharge port is located in the area below the TP plate group. The liquid discharge port is communicated with the two-phase separation part.

[0007] The utility model relates to a two-phase separation device for high-sulfur gas fields. By arranging a separator in the separation device and providing a gas-liquid inlet end and an exhaust port on the separator, when the gas-liquid mixture enters the separator from the gas-liquid inlet end, a part of the gas is discharged through the exhaust port at this time, and the liquid remains in the separator due to its own weight. A two-phase separation part is also provided in the separator. The two-phase separation part is provided with a TP plate group on the side close to the gas-liquid inlet end. The TP plate group is used to separate impurities from the gas-liquid mixture entering from the gas-liquid inlet end. The interior of the two-phase separation part is divided into several sub-separation parts, and the sub-separation parts are used to receive the gas-liquid mixture flowing out from the TP plate group. In this way, the gas-liquid mixture flows into several sub-separation parts, and the gas-liquid mixture is shunted by the sub-separation parts. Each sub-separation part is a flat space with a serrated cross-section. In this way, when the gas-liquid mixture in each sub-separation part is flowing, an interface liquid level for solid-liquid separation can be quickly formed in the sub-separation part through the shallow pond theory. And when the gas-liquid mixture flows in the flat space, since the cross-section of the flat space is serrated, the gas-liquid mixture can condense into water droplets in the flat space. The water droplets sink due to their own weight, and the gas after separating the water droplets rises and is discharged from the exhaust port, realizing two-phase separation and improving the separation efficiency.

[0008] Preferably, the main body of the two-phase separation part is a cylinder, the sub-separation part is located inside the two-phase separation part, a support frame is provided in the two-phase separation part, the support frame is connected to the inner wall of the two-phase separation part, and the support frame is configured to carry the sub-separation part.

[0009] Through the above method, the sub-separation part can be quickly installed in the two-phase separation part, realizing the quick installation of the two-phase separation part and improving the work efficiency.

[0010] Preferably, the TP plate group is composed of a plurality of corrugated plates arranged at intervals.

[0011] The impurities in the gas-liquid mixture can be separated out by the corrugated plates first.

[0012] Preferably, the sub-separation part is composed of at least two baffle plates, each baffle plate is connected to the support frame, adjacent two baffle plates are arranged at intervals, and the installation direction of the baffle plates is the flowing direction of the gas-liquid substance.

[0013] Due to the simple structure of the baffle plates, the installation and maintenance are more convenient. During the operation of the equipment, if it is necessary to clean or replace the baffle plates, the operation difficulty of the staff is reduced, the downtime is reduced, and the operation efficiency of the equipment is improved.

[0014] Preferably, at least one groove is provided on the baffle plate, and the setting direction of the groove is the same as the flowing direction of the gas-liquid substance in the two-phase separation part.

[0015] By providing grooves on the baffle plate, when the gas-liquid mixture is separated between the baffle plates, the grooves can block the flow path of the gas-liquid mixture, enabling a part of the gas-liquid mixture to condense into water droplets in the grooves and separating the gas.

[0016] Preferably, the groove comprises a pair of inclined plates, and a horizontal connecting plate is provided between two adjacent inclined plates. The end of the groove with a larger opening faces the flat space.

[0017] This setting makes the cross-sectional shape of the groove trapezoidal. Since the closed end of the groove is narrower than the open end, this can accelerate the flow velocity of the fluid. And through the trapezoidal structure, when the groove accommodates sediments, the flat horizontal connecting plate can disperse the stress received by the groove, reducing the stress concentration and improving the anti-deformation ability of the baffle plate.

[0018] Preferably, an on-line water dew point monitoring device is provided on the exhaust port.

[0019] Through this on-line water dew point monitoring device, the real-time monitoring of the water dew point of natural gas can be realized.

[0020] Preferably, the on-line water dew point monitoring device is connected to a processing system, and the processing system is used to monitor the data of the on-line water dew point monitoring device.

[0021] This setting can record and process the data measured by the on-line water dew point monitoring device through the processing system.

[0022] Preferably, the processing system is connected to an alarm module, and the alarm module is configured to give an alarm when the data of the on-line water dew point monitoring device is abnormal.

[0023] When it is found that the data measured by the on-line water dew point monitoring device is abnormal during data processing, an alarm can be given through the alarm module to remind of draining the liquid from the separator or checking and disposing, etc., which can effectively reduce the entry of condensate water into the off-site sour gas pipeline and delay the liquid accumulation corrosion of the pipeline.

[0024] Compared with the prior art, the beneficial effects of the present utility model are:

[0025] 1. The utility model relates to a two-phase separation device for a high-sulfur gas field. A separator is arranged inside the separation device, and a gas-liquid inlet end and an exhaust port are arranged on the separator. When a gas-liquid mixture enters the separator from the gas-liquid inlet end, part of the gas is discharged through the exhaust port at this time, and the liquid remains in the separator due to its own weight. A two-phase separation part is also arranged inside the separator. The two-phase separation part is provided with a TP plate group on one side close to the gas-liquid inlet end. The TP plate group is used to separate impurities from the gas-liquid mixture entering from the gas-liquid inlet end. The inside of the two-phase separation part is divided into several sub-separation parts, and the sub-separation parts are used to receive the gas-liquid mixture flowing out of the TP plate group. In this way, the gas-liquid mixture flows into several sub-separation parts, and the gas-liquid mixture is shunted by the sub-separation parts. Each sub-separation part is a flat space with a serrated cross-section. In this way, when the gas-liquid mixture in each sub-separation part is flowing, an interface liquid level for solid-liquid separation can be quickly formed in the sub-separation part through the shallow pond theory. And when the gas-liquid mixture flows in the flat space, due to the serrated cross-section of the flat space, the gas-liquid mixture can condense into water droplets in the flat space. The water droplets sink due to their own weight, and the gas after separating the water droplets rises and is discharged from the exhaust port, realizing two-phase separation and improving the separation efficiency. Description of the Drawings

[0026] Figure 1 Structural schematic diagram of the separation device of the present utility model;

[0027] Figure 2 Structural schematic diagram of a single sub-separation part of the present utility model;

[0028] Figure 3 Structural schematic diagram of the baffle plate of the present utility model.

[0029] Reference numerals in the figure: 1 - separator; 2 - gas-liquid inlet end; 3 - exhaust port; 4 - two-phase separation part; 41 - sub-separation part; 411 - baffle plate; 412 - groove; 4121 - inclined plate; 4122 - horizontal connecting plate; 42 - support frame; 5 - liquid discharge port; 6 - on-line water dew point monitoring device; 7 - processing system; 71 - alarm module; 8 - TP plate group. Detailed Embodiments

[0030] The following further describes the present utility model in detail with reference to 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. All technologies implemented based on the content of the present utility model belong to the scope of the present utility model.

[0031] 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 product / device / equipment of the present utility model is commonly 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, facilitating 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.

[0032] 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 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 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 perform its function in the solution of the present utility model.

[0033] 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.

[0034] In addition, in the description of the embodiments of the present utility model, "several", "multiple", "a plurality 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 exceeding 9.

[0035] In addition, in the description of the technical solution of the present utility model, unless otherwise clearly specified / defined / limited, where terms such as "set", "installed", "connected", "connected to", "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. This kind of 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 elements.

[0036] Example 1

[0037] As Figure 1 shown, a two-phase separation device for a high-sulfur gas field, the separation device includes a separator 1 for gas-liquid separation. The separator 1 includes a two-phase separation part 4. An exhaust port 3 for discharging gas is provided at the top of the separator 1, and the exhaust port 3 communicates with the two-phase separation part 4. The two-phase separation part 4 is provided with a number of sub-separation parts 41, and the sub-separation parts 41 are located at one end of the two-phase separation part 4 close to the exhaust port 3, and a number of sub-separation parts 41 divide the two-phase separation part 4 into a number of flat spaces with a serrated cross-section;

[0038] Further, a TP plate group 8 (i.e., oil-water separation packing, also known as plug flow mist eliminator packing, TP plate group packing, metal corrugated baffle packing, snake plate corrugated packing, oil-water coalescence packing) is provided in the two-phase separation part 4. The TP plate group 8 is located on one side of the two-phase separation part 4 close to the gas-liquid inlet end 2, and the TP plate group 8 is composed of a number of corrugated plates. The setting direction of the TP plate group 8 is the flow direction of the gas-liquid mixture. By arranging the TP plate group 8 on one side of the two-phase separation part 4 close to the gas-liquid inlet end 2 (i.e., the lower area of the sub-separation part 41), so that after the gas-liquid mixture enters the separator 1 through the gas-liquid inlet end 2, it first passes through the TP plate group 8 to preliminarily separate the impurities in the gas-liquid mixture. Since the setting direction of the TP plate group 8 is the flow direction of the gas-liquid mixture, the preliminarily separated gas-liquid mixture can enter the sub-separation part 41 for two-phase separation. The sub-separation part 41 is a flat space with a serrated cross-section. In this way, when the gas-liquid mixture enters the flat space (sub-separation part 41), through the shallow pond principle (establishing a certain depth of water body, and using the specific gravity difference between the water body and the sediment and the effect of flow to separate impurities and pollutants from the water), and due to the blocking effect of the serrated space on the gas-liquid mixture, a part of the gas-liquid mixture condenses into water droplets in the flat space, and the water droplets fall by their own weight. The remaining gas in the gas-liquid mixture after separating the water droplets is discharged from the exhaust port 3 at the top to achieve two-phase separation;

[0039] Further, a liquid discharge port 5 is provided on the separator 1. The liquid discharge port 5 communicates with the two-phase separation part 4 and is located in the lower area of the TP plate group 8, so that the liquid after two-phase separation can flow out through the liquid discharge port 5. One end of the liquid discharge port 5 is connected to a liquid storage tank for storing the liquid discharged after two-phase separation.

[0040] In this application, the flat space refers to dividing the entire accommodation space of the two-phase separation part 4 into multiple smaller accommodation spaces by setting a number of sub-separation parts 41. Each divided single accommodation space is flatter in geometric shape than the overall accommodation space of the two-phase separation part 4, that is, the height is smaller.

[0041] In one or more embodiments, the body of the two-phase separation section 4 is a cylinder. The sub-separation section 41 is located inside the two-phase separation section 4 and is used to achieve two-phase separation. A support frame 42 is provided inside the two-phase separation section 4. The support frame 42 is located at one end of the two-phase separation section 4. Both sides of the support frame 42 are connected to the inside of the two-phase separation section 4. The support frame 42 is configured to carry the sub-separation section 41, facilitating the subsequent rapid installation of the two-phase separation section 4;

[0042] Furthermore, each sub-separation section 41 is composed of at least two baffle plates 411. Each baffle plate 411 is connected to the support frame 42. The adjacent two baffle plates 411 are arranged at intervals to form the sub-separation section 41. The arrangement direction of the baffle plate 411 is the flow direction of the gas-liquid mixture. The baffle plate 411 has a simple structure, and installation and maintenance are more convenient. During the operation of the equipment, if the baffle plate 411 needs to be cleaned or replaced, the operation difficulty for the staff is reduced, the downtime is reduced, and the operation efficiency of the equipment is improved, as Figure 2 as Figure 3 shown.

[0043] In one or more embodiments, at least one groove 412 is provided on each baffle plate 411. The groove 412 is used to store the dispersed phase separated during the two-phase separation process, avoiding disturbance during the separation process and resulting in a reduction in separation efficiency.

[0044] In one or more embodiments, the groove 412 on the baffle plate 411 includes a pair of inclined plates 4121 and a horizontal connecting plate 4122. Each pair of inclined plates 4121 is connected by the horizontal connecting plate 4122. The bottom of the connected groove 412 is narrower than the top, forming an inverted trapezoidal groove 412. Since the bottom of the groove 412 is narrower than the top, this can accelerate the flow velocity of the fluid. And through this trapezoidal structure, when the groove 412 accommodates sediment, the stress received by the groove 412 can be dispersed through the flat horizontal connecting plate 4122, reducing the stress concentration, and improving the anti-deformation ability of the baffle plate 411, as Figure 2 as Figure 3 shown.

[0045] In one or more embodiments, a liquid discharge port 5 is provided on the separator 1. The liquid discharge port 5 is communicated with the two-phase separation section 4. The liquid discharge port 5 is used to discharge the separated liquid;

[0046] Furthermore, an exhaust port 3 is provided at the top of the separator 1, and an on-line water dew point monitoring device 6 is provided at the exhaust port 3. The natural gas water dew point can be monitored in real time through the on-line water dew point monitoring device 6, and the on-line water dew point monitoring device 6 is connected to a processing system 7. The processing system 7 is used to process the data of the on-line water dew point monitoring device 6, record and process the data measured by the on-line water dew point monitoring device 6;

[0047] Furthermore, the processing system 7 is connected to an alarm module 71. When it is found that the data measured by the on-line water dew point monitoring device 6 is abnormal during data processing, an alarm can be issued through the alarm module 71. Through the alarm module 71, the condensate water entering the off-site sour gas pipeline can be effectively reduced, and the liquid accumulation corrosion of the pipeline can be delayed, as Figure 1 shown.

[0048] 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 in the protection scope of the present invention.

Claims

1. A two-phase separation device for a high-sulfur gas field, the separation device comprising a separator (1), characterized in that, The separator (1) includes a gas-liquid inlet end (2). An exhaust port (3) is provided at the top of the separator (1). A two-phase separation part (4) is provided inside the separator (1). One end of the two-phase separation part (4) is communicated with the gas-liquid inlet end (2). The two-phase separation part (4) is provided with a plurality of sub-separation parts (41). The sub-separation parts (41) divide the two-phase separation part (4) into a plurality of flat spaces with serrated cross-sections. A TP plate group (8) is provided in the two-phase separation part (4). The sub-separation parts (41) are located at one end of the two-phase separation part (4) close to the exhaust port (3). The TP plate group (8) is located at one end of the two-phase separation part (4) close to the gas-liquid inlet end (2). A liquid discharge port (5) is provided on the separator (1). The liquid discharge port (5) is located in the area below the TP plate group (8). The liquid discharge port (5) is communicated with the two-phase separation part (4).

2. The two-phase separation device for a high-sulfur gas field according to claim 1, wherein The body of the two-phase separation part (4) is a cylinder. The sub-separation parts (41) are located inside the two-phase separation part (4). A support frame (42) is provided in the two-phase separation part (4). The support frame (42) is connected to the inner wall of the two-phase separation part (4). The support frame (42) is configured to carry the sub-separation parts (41).

3. The two-phase separation device for high-sulfur gas fields according to claim 2, characterized in that, The sub-separation part (41) is composed of at least two baffle plates (411). Each baffle plate (411) is connected to the support frame (42). Adjacent two baffle plates (411) are arranged at intervals. The installation direction of the baffle plates (411) is the flow direction of the gas-liquid substance.

4. The two-phase separation device for a high-sulfur gas field according to claim 3, characterized in that, At least one groove (412) is provided on the baffle plate (411). The setting direction of the groove (412) is the same as the flow direction of the gas-liquid substance in the two-phase separation part (4).

5. A two-phase separation device for a high-sulfur gas field according to claim 4, characterized in that, The groove (412) includes a pair of inclined plates (4121). A horizontal connecting plate (4122) is provided between adjacent two inclined plates (4121). The bottom width of the groove (412) is smaller than the top width.

6. A two-phase separation device for a high-sulfur gas field according to any one of claims 1-5, characterized in that, A water dew point on-line monitoring device (6) is provided on the exhaust port (3).

7. A two-phase separation device for a high-sulfur gas field according to claim 6, characterized in that, The water dew point on-line monitoring device (6) is connected to a processing system (7). The processing system (7) is used to monitor the data of the water dew point on-line monitoring device (6).

8. A two-phase separation device for a high-sulfur gas field according to claim 7, characterized in that The processing system (7) is connected to an alarm module (71). The alarm module (71) is configured to give an alarm when the data of the water dew point on-line monitoring device (6) is abnormal.

9. A two-phase separation device for a high-sulfur gas field according to claim 1, characterized in that, The TP plate group (8) is composed of a plurality of corrugated plates arranged at intervals.

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