CN215822556U - Cascade axial-flow type gas-liquid separator - Google Patents
Cascade axial-flow type gas-liquid separator Download PDFInfo
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- CN215822556U CN215822556U CN202121679967.9U CN202121679967U CN215822556U CN 215822556 U CN215822556 U CN 215822556U CN 202121679967 U CN202121679967 U CN 202121679967U CN 215822556 U CN215822556 U CN 215822556U
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Abstract
The utility model relates to the technical field of gas-liquid separation, in particular to a cascade axial-flow type gas-liquid separator for removing liquid in natural gas exploitation. The cascade axial-flow type gas-liquid separator comprises a gas-liquid inlet, a buffer cavity, a guide vane, a primary rotational flow cavity, a cone section, a liquid outlet, a gradually-expanding cone cover, an overflow pipe, two side openings, a baffle, a secondary rotational flow cavity, a down-flow hole, a down-flow pipe, a sleeve and a gas outlet. Gas and liquid phases form good rotary motion through the guide vanes and enter the primary cyclone cavity for first centrifugal separation, liquid is discharged through the bottom liquid outlet, the remaining gas and liquid phases enter the secondary cyclone cavity for second separation, the separated liquid flows into the sleeve through the downcomer to realize secondary liquid discharge, and gas is discharged through the top gas outlet. The utility model effectively combines two-stage centrifugal separation processes, can obviously improve the gas-liquid separation efficiency, has smaller pressure drop loss of the separator and has wide application prospect.
Description
Technical Field
The utility model relates to the technical field of gas-liquid separation, in particular to a cascade axial-flow type gas-liquid separator for removing liquid in natural gas exploitation.
Background
During the exploitation and transportation of natural gas, liquid impurities such as moisture are easily mixed in, and the existence of the liquid impurities can cause serious consequences: containing CO2And H2The natural gas of S reacts with water to generate corresponding acid to erode pipelines under the condition that water exists; the natural gas hydrate generated under certain conditions can block valves and pipelines, reduce the capacity of equipment for transporting media and cause additional power consumption. In order to ensure normal transportation and safe use of the natural gas, liquid impurities in the natural gas must be separated and removed, namely the natural gas must be purified, and the output natural gas is ensured to meet the requirements of relevant regulations and safe use.
Traditional gas-liquid separation equipment usually adopts one-way import structure for there is eccentric air current inside the separator, and the pressure drop loss is great, and the short circuit phenomenon near single-stage separation space and overflow pipe import will lead to separation efficiency not high again. Based on the defects, the development of the gas-liquid separator which has a compact structure, high efficiency, energy conservation and stable internal flow field has important significance for industrial production.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects of the prior art, the utility model provides the cascade axial-flow type gas-liquid separator which effectively combines two-stage centrifugal separation processes, adopts the guide vanes and the divergent cone cover to ensure that the internal flow field of the separator has better stability, reduces short-circuit flow, improves the gas-liquid separation efficiency and has smaller pressure drop loss.
The technical scheme of the utility model is as follows: a cascade axial-flow type gas-liquid separator comprises a gas-liquid inlet, a buffer cavity, guide vanes, a primary rotational flow cavity, a cone section, a liquid outlet, a gradually-expanding cone cover, an overflow pipe, two side openings, a baffle, a secondary rotational flow cavity, a down-flow hole, a down-flow pipe, a sleeve and a gas outlet. Guide vanes are arranged above the primary cyclone cavity, a gas-liquid mixture forms a rotary motion state under the action of the guide vanes and enters the primary cyclone cavity to be subjected to primary centrifugal separation, and liquid is discharged through a bottom liquid outlet to realize primary liquid discharge. A secondary rotational flow cavity is additionally arranged above the buffer cavity, gas carries unseparated liquid drops to enter through openings at two sides of the top of the overflow pipe, and at the moment, gas-liquid phases still keep a rotating state to carry out secondary centrifugal separation. The outer part of the separator is provided with a downcomer, and the liquid separated in the secondary cyclone cavity flows downwards into the sleeve through the downcomer to realize the secondary liquid drainage process. And gas in the secondary cyclone cavity is discharged through a gas outlet at the top of the separator.
Preferably, the cascade axial-flow type gas-liquid separator is characterized in that a secondary rotational flow cavity is additionally arranged above the buffer cavity, and the two-stage centrifugal separation process is combined.
Preferably, a plurality of guide vanes are arranged between the buffer cavity and the first-stage rotational flow cavity, so that gas-liquid two phases form a rotational downward movement state.
Preferably, the bottom of the overflow pipe is provided with a gradually expanding type conical cover, the top of the overflow pipe is provided with openings at two sides and a baffle, and gas-liquid two phases enter the overflow pipe from the gradually expanding type conical cover and enter the secondary cyclone cavity through the openings at two sides.
Preferably, the top of the secondary cyclone cavity is provided with a gas outlet, the outer side of the bottom of the secondary cyclone cavity is provided with three down-flow holes, and the down-flow holes are connected with down-flow tubes. The bottom of the primary vortex cavity is provided with a conical section and a liquid outlet, the outside of the primary vortex cavity is additionally provided with a sleeve connected with a downcomer, and liquid flows into the sleeve through the downcomer to realize a secondary liquid drainage process.
The main advantages of the utility model are:
1. the utility model effectively combines two-stage centrifugal separation processes, and the separation efficiency can be improved by more than 10% through experimental tests.
2. The separator adopts the guide vanes to enable the gas phase and the liquid phase to form a better rotary motion state, thereby enhancing the symmetry and the stability of the flow and being beneficial to the improvement of the separation efficiency; the bottom of the overflow pipe is provided with a divergent cone cover, so that short-circuit current can be effectively reduced, and the separation efficiency is improved; the outer part of the separator is provided with a downcomer which can discharge the liquid separated in the secondary cyclone cavity in time.
3. The separator has continuous and stable operation and small pressure drop loss, and the guide vane and the separator are processed into a whole in the application process, so that the installation is convenient, and the application prospect is wide.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic side view of the structure of the present invention;
1-gas-liquid inlet, 2-buffer cavity, 3-guide vane, 4-primary cyclone cavity, 5-conical section, 6-liquid outlet, 7-divergent cone cover, 8-overflow pipe, 9-opening on two sides, 10-baffle, 11-secondary cyclone cavity, 12-down flow hole, 13-down flow pipe, 14-sleeve and 15-gas outlet.
Detailed Description
The preferred embodiments are further explained below in conjunction with the appended drawings so that the advantages and features of the present invention will be more readily understood by those skilled in the art.
A cascaded axial flow gas-liquid separator, characterized by: the separator comprises a gas-liquid inlet (1), a buffer cavity (2), guide vanes (3), a primary rotational flow cavity (4), a conical section (5), a liquid outlet (6), a gradually expanding conical cover (7), an overflow pipe (8), openings (9) at two sides, a baffle (10), a secondary rotational flow cavity (11), a down-flow hole (12), a down-flow pipe (13), a sleeve (14) and a gas outlet (15).
The gas-liquid mixed flow enters the buffer cavity (2) from the gas-liquid inlet (1) and forms a rotary downward motion state under the action of the guide vanes (3). The density difference of gas phase and liquid phase is large, the liquid drops are subjected to relative motion under the action of centrifugal force with different sizes, the centrifugal force borne by the liquid drops is dozens of times of the gravity of the liquid drops, most of the liquid drops move to the inner wall surface of the primary rotational flow cavity (4) and are accumulated to form a liquid film, the liquid film flows downwards along the inner wall surface and passes through the conical section (5), and the liquid is discharged from the separator through the liquid outlet (6) to realize primary liquid discharge. The gas rotates and reaches the conical section (5) downwards, changes the movement direction to move upwards under the influence of the tapered structure of the conical section (5), and enters the overflow pipe (8) through the gradually-expanding conical cover (7). The top of the overflow pipe (8) is provided with two side openings (9) and a baffle (10), gas-liquid mixed flow keeps a rotary motion state and enters the secondary cyclone cavity (11) through the two side openings (9) to carry out secondary centrifugal separation, liquid drops are accumulated on the inner wall surface of the secondary cyclone cavity (11) to form a liquid film flowing downwards, the liquid enters a downcomer (13) outside the separator through a downcomer hole (12), and finally flows into the sleeve (14) to realize a secondary liquid drainage process. Because liquid continuously flows into the downcomer (13) to form a liquid seal state, finally, gas in the secondary cyclone cavity (11) is discharged through a gas outlet (15) at the top of the separator to finish the gas-liquid separation process.
The basic principles of operation, principal features and advantages of the utility model are described with reference to the accompanying drawings. The present invention is subject to various changes and modifications without departing from the spirit and scope of the utility model, and such changes and modifications are intended to be included within the scope of the utility model as claimed.
Claims (6)
1. A cascaded axial flow gas-liquid separator, characterized by: the separator comprises a gas-liquid inlet (1), a buffer cavity (2), guide vanes (3), a primary rotational flow cavity (4), a conical section (5), a liquid outlet (6), a gradually expanding conical cover (7), an overflow pipe (8), openings (9) at two sides, a baffle (10), a secondary rotational flow cavity (11), a down-flow hole (12), a down-flow pipe (13), a sleeve (14) and a gas outlet (15), wherein the buffer cavity (2) is connected with the gas-liquid inlet (1), the secondary rotational flow cavity (11) is additionally arranged above the buffer cavity, and the guide vanes (3) are arranged below the buffer cavity; an overflow pipe (8) is arranged in the middle of the guide vane (3), and a primary vortex cavity (4) is communicated below the guide vane; a sleeve (14) is additionally arranged outside the primary rotational flow cavity (4), and a conical section (5) and a liquid outlet (6) are sequentially connected below the primary rotational flow cavity; the top of the secondary rotational flow cavity (11) is provided with a gas outlet (15), and the outer side of the bottom is communicated with a downcomer (13); the downcomer (13) communicates downwardly with the sleeve (14).
2. The cascaded axial flow gas-liquid separator of claim 1, wherein: the separator combines two-stage centrifugal separation processes, namely gas-liquid two phases are subjected to first centrifugal separation in the primary vortex cavity (4) and then enter the secondary vortex cavity (11) for second centrifugal separation.
3. The cascaded axial flow gas-liquid separator of claim 1, wherein: the gas phase and the liquid phase rotate to move downwards under the action of the guide vanes (3), and the liquid is discharged out of the separator through the conical section (5) and the liquid outlet (6) to realize primary liquid discharge.
4. The cascaded axial flow gas-liquid separator of claim 1, wherein: the bottom of the overflow pipe (8) is provided with a gradually-expanding type conical cover (7), the top of the overflow pipe is provided with two side openings (9) and a baffle (10), gas and liquid phases enter the overflow pipe from the gradually-expanding type conical cover (7) and enter a secondary vortex cavity (11) through the two side openings (9) to carry out secondary separation.
5. The cascaded axial flow gas-liquid separator of claim 1, wherein: three downcomers (13) are arranged outside the separator, and liquid after secondary separation enters the downcomers (13) through the downcomer holes (12) and flows downwards into the sleeve (14) to realize a secondary liquid drainage process.
6. The cascaded axial flow gas-liquid separator of claim 1, wherein: liquid continuously flows into the downcomer (13) to form a liquid seal state, and gas in the secondary cyclone cavity (11) moves upwards and is discharged out of the separator through the gas outlet (15).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121679967.9U CN215822556U (en) | 2021-07-23 | 2021-07-23 | Cascade axial-flow type gas-liquid separator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121679967.9U CN215822556U (en) | 2021-07-23 | 2021-07-23 | Cascade axial-flow type gas-liquid separator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116651089A (en) * | 2023-04-27 | 2023-08-29 | 北京普瑞浩特能源科技有限公司 | Double-stage serial direct current separator and separation method and application thereof |
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2021
- 2021-07-23 CN CN202121679967.9U patent/CN215822556U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116651089A (en) * | 2023-04-27 | 2023-08-29 | 北京普瑞浩特能源科技有限公司 | Double-stage serial direct current separator and separation method and application thereof |
| CN116651089B (en) * | 2023-04-27 | 2023-12-08 | 北京普瑞浩特能源科技有限公司 | Double-stage serial direct current separator and separation method and application thereof |
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