Rotational flow-coalescence integrated gas-liquid separation device and method
Through the integrated cyclone-coalignment gas-liquid separation device, combined with cyclone, inertia and coalescence separation technology, the problems of low separation efficiency and large equipment area in natural gas purification are solved, and efficient and compact gas-liquid separation is achieved. Reduces the harm of liquid phase impurities.
Patent Information
- Application Number
- CN202411355269.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-27
- Publication Date
- 2024-12-10
AI Technical Summary
The prior art has low separation efficiency, large equipment area and low space utilization during the natural gas purification process, and cannot effectively remove liquid droplets in the gas-liquid separation equipment, resulting in liquid impurities that cause harm to production and life.
Using a cyclone-coaling integrated gas-liquid separation device, liquid particles of different particle size ranges are separated in sequence through a series combination of cyclone separation, inertial separation and coalescence separation technology, including gas-liquid cyclone sections and gas-liquid coalescence sections. , using centrifugal force, inertial separation and filtration separation to achieve efficient separation.
It realizes efficient and compact gas-liquid separation, improves separation efficiency and space utilization, and reduces the harm of liquid phase impurities to production and life.
Smart Images
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Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of gas-liquid purification, and in particular to a cyclone-coalescing integrated gas-liquid separation device and method. Background Art
[0002] As a recognized clean, efficient, stable and low-carbon fossil energy, natural gas has become an important part of my country's energy system. When natural gas is extracted, it is in a water-saturated state and contains some free water and liquid impurities such as light hydrocarbons. Natural gas and water will form natural gas hydrates, which are semi-stable solid compounds that can be formed above zero degrees. It can not only cause pipeline blockages, but also cause blockages in nozzles and separation equipment, so it is very necessary to remove the liquid from the natural gas.
[0003] At present, the technologies for purifying natural gas include: gravity sedimentation, which has the disadvantages of low separation efficiency and can only separate larger droplets, requiring a very slow gas flow rate, large equipment size, and a long residence time; centrifugal separation, which has the disadvantages of narrow separation load range, and when the gas flow rate exceeds a certain range, the separation efficiency decreases. If the gas flow rate is too slow, the inertia of the liquid is too small, and no collision or separation can occur. If the gas flow rate is too fast, the liquid that has collided with the wall will be taken away again; inertial separation, which has the disadvantages of limited separation efficiency and complex design. After the gas flow turns or impacts the baffle, secondary entrainment may occur, that is, the separated droplets may be taken away again by the high-speed gas, affecting the separation effect; filtration separation, which has the disadvantages of large resistance, easy clogging, high cost, and certain selectivity for droplet size, and can usually only effectively separate larger droplets. The single use of the above common methods cannot achieve efficient droplet removal. Therefore, it is very important to develop a natural gas deliquification device that couples multiple separation processes. Summary of the invention
[0004] In order to solve the above technical problems, the purpose of the present invention is to provide a cyclone-coagulation integrated gas-liquid separation device and method, which adopts the technology of centrifugal separation, inertial separation and coagulation separation in series to successively separate liquid particles of different particle size ranges in the gas, so as to effectively solve the problems of large gas-liquid separation equipment footprint, low separation efficiency and low space utilization in the natural gas extraction process, thereby reducing the harm of liquid impurities to production and life.
[0005] The technical solution adopted by the present invention is as follows: a cyclone-coalescing integrated gas-liquid separation device includes a cyclone separation section and a gas-liquid coalescing section, characterized in that: the gas-liquid cyclone separation section is placed below the gas-liquid coalescing section, including: a gas inlet, a cyclone separation section, an exhaust pipe and a liquid outlet, the exhaust pipe of the gas-liquid cyclone separation section directly connects to the end of the gas-liquid coalescing section, and the gas-liquid coalescing separation section includes: a coagulation layer, a liquid discharge port, a gas outlet and an opening.
[0006] As a preferred technical solution, the exhaust pipe extends from the swirl section to the agglomeration section, and the exhaust pipe outlet end is higher than the uppermost end of the agglomeration layer to prevent the gas coming out of the exhaust pipe from directly entering the agglomeration layer without utilizing the inertial separation of the top plate.
[0007] As an optimal technical solution, the uppermost end of the liquid outlet is lower than the lower end of the coalescence layer to prevent backflow caused by liquid not being discharged in time, and the lowermost end of the gas outlet is higher than the upper end of the coalescence layer to prevent the liquid phase from being blown out of the coalescence layer by high-speed gas.
[0008] As a preferred technical solution, the inner part of the aggregation layer uses fiber aggregation material and adopts a double-layer or multi-layer composite structure.
[0009] As a preferred technical solution, the fiber agglomeration material in the agglomeration layer is selected from two or more of metal fibers, glass fibers, polytetrafluoroethylene fibers and polypropylene fibers.
[0010] As a preferred technical solution, the gas inlet is a circular or tubular inlet structure, or a rectangular tangent inlet structure, or a volute inlet mechanism, or a guide swirl blade inlet structure.
[0011] As a preferred technical solution, the bottom of the coalescing layer has an opening for discharging part of the liquid separated by inertial separation.
[0012] Based on the above device, the present invention also relates to a separation method of a cyclone-coalescing integrated gas-liquid separation device, comprising the following steps:
[0013] 1) The liquid-containing mixed gas enters the cyclone separation section from the gas inlet. The liquid-containing mixed gas rotates along the side wall of the cylinder. Under the action of gravity and centrifugal force, large droplets are easily thrown to the side wall and flow out from the bottom liquid outlet, realizing the centrifugal separation process.
[0014] 2) At this time, the mixed gas still containing small droplets gathers at the central axis and moves upward along the exhaust pipe. The mixed gas hits the top plate and is separated from the gas under the action of inertial separation, and is discharged through the bottom opening of the coalescence layer, realizing the inertial separation process.
[0015] 3) The gas carrying fine droplets passes through the coalescing layer, the gas phase is discharged from the gas outlet, and the intercepted liquid phase is discharged from the liquid outlet, thus realizing the filtration separation process.
[0016] Compared with the prior art, the advantages of the present invention are:
[0017] The present invention proposes a cyclone-coalescing integrated gas-liquid separation device, which is no longer a traditional single separation technology in series, but adopts a technology of cyclone separation, inertial separation and coalescing separation in series to successively separate liquid particles of different particle size ranges in the gas. The separation device integrates multiple separation technologies in one, and has the advantages of compact structure, high separation efficiency and high space utilization. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a schematic diagram of the structure of the cyclone-coalescence integrated gas-liquid separation device of the present invention, Figure 2 It is a cross-sectional view of the gas-liquid coalescence section.
[0019] In the figure: 1, shell, 2, top plate, 3, liquid outlet, 4, gas inlet, 5, gas outlet, 6, liquid drain, 7, exhaust pipe, 8, coalescing layer, 9, opening. DETAILED DESCRIPTION
[0020] The present invention is further described in detail below with reference to the accompanying drawings.
[0021] The following is a specific embodiment to illustrate the implementation method of the present invention. People familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.
[0022] With reference to the drawings, the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any structural modification, change in proportional relationship, or adjustment of size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention. At the same time, the position limiting terms quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of the relative relationship, without substantially changing the technical contents, should also be regarded as the scope of the implementation of the present invention.
[0023] Figure 1The structure diagram of the cyclone-coalescing integrated gas-liquid separation device of the present invention is shown in the figure. As shown in the figure, the cyclone-coalescing integrated gas-liquid separation device of the present invention comprises a gas-liquid cyclone section and a gas-liquid coalescing section, the gas-liquid cyclone section comprises a gas inlet 4, a cyclone separation section, an exhaust pipe 7 and a liquid outlet 3, the gas-liquid coalescing section comprises an annular coagulation layer 8, a liquid discharge port 6 and a gas outlet 5, the exhaust pipe 7 extends from the cyclone area to the coagulation area, the outlet end of the exhaust pipe 7 is higher than the uppermost end of the coagulation layer 8 to prevent the gas coming out of the exhaust pipe 7 from directly entering the coagulation layer 8 without utilizing the inertial separation of the top plate, the uppermost end of the liquid outlet 3 is lower than the lower end of the coagulation layer 8 to prevent the liquid from being discharged in time and causing reflux, the lowermost end of the gas outlet 5 is higher than the upper end of the coagulation layer 8, the coagulation layer 8 is composed of a metal skeleton, a coagulation layer and a drainage layer, and the bottom of the coagulation layer has an opening 9, which is conducive to the mixed gas coming out of the exhaust pipe hitting the top plate, and part of the liquid is discharged from the liquid discharge port under the action of inertial separation.
[0024] The specific operation process is as follows: the liquid-containing mixed gas enters the cyclone separation section from the gas inlet, and the liquid-containing mixed gas rotates along the side wall of the cylinder. Under the action of gravity and centrifugal force, large droplets are easily thrown to the side wall and flow out from the bottom liquid outlet, realizing the centrifugal separation process. At this time, the mixed gas still with small droplets gathers at the central axis and moves upward along the exhaust pipe. The mixed gas hits the top plate and is separated from the gas under the action of inertial separation, and is discharged through the bottom opening of the coalescence layer, realizing the inertial separation process. The gas carrying fine droplets passes through the coalescence layer, the gas phase is discharged from the gas outlet, and the intercepted liquid phase is discharged from the liquid outlet, realizing the filtration separation process.
[0025] Although the specific implementation modes of the present invention are described above in conjunction with the accompanying drawings, this does not limit the scope of protection of the present invention. Those skilled in the art should understand that, based on the technical solution of the present invention, various modifications or deformations of equivalent structures or equivalent processes that can be made by those skilled in the art without creative work, or directly or indirectly applied to other related technical fields, are still within the scope of protection of the present invention.
Claims
1. A cyclone-coalescing integrated gas-liquid separation device, comprising a cyclone separation section and a gas-liquid coalescing section, characterized in that: The gas-liquid cyclone separation section is placed below the gas-liquid coalescing section, and includes: a gas inlet, a cyclone separation section, an exhaust pipe and a liquid outlet. The exhaust pipe of the gas-liquid cyclone separation section directly leads to the end of the gas-liquid coalescing section. The gas-liquid coalescing separation section includes: a coalescing layer, a liquid discharge port, a gas outlet and an opening.
2. The cyclone-coalescence integrated gas-liquid separation device according to claim 1, characterized in that: The gas inlet is a circular or tubular inlet structure, or a rectangular tangent inlet structure, or a volute inlet mechanism, or a guide swirl blade inlet structure.
3. The cyclone-coalescence integrated gas-liquid separation device according to claim 1, characterized in that: The outlet end of the exhaust pipe should be higher than the uppermost end of the coalescence layer to facilitate the inertial separation process of gas and liquid.
4. The cyclone-coalescence integrated gas-liquid separation device according to claim 1, characterized in that: The uppermost end of the liquid outlet is lower than the lower end of the coalescing layer, and the lowermost end of the gas outlet is higher than the upper end of the coalescing layer.
5. The cyclone-coalescence integrated gas-liquid separation device according to claim 1, characterized in that: The coalescing layer adopts a double-layer or multi-layer composite structure, and the fiber coalescing material in the coalescing layer is selected from two or more of metal fibers, glass fibers, polytetrafluoroethylene fibers and polypropylene fibers.
6. The cyclone-coalescence integrated gas-liquid separation device according to claim 1, characterized in that: The bottom of the coalescing layer is provided with an opening for discharging part of the liquid separated by inertial separation.
7. A separation method using a cyclone-coalescing integrated gas-liquid separation device as described in any one of claims 1 to 6, comprising the following steps: 1) The liquid mixed gas enters the cyclone separation section from the gas inlet, and the liquid mixed gas rotates along the side wall of the cylinder. Under the action of gravity and centrifugal force, large liquid droplets are easily thrown to the side wall and flow out from the bottom liquid outlet. 2) At this time, the mixed gas still containing small droplets gathers at the central axis and moves upward along the exhaust pipe. The mixed gas hits the top plate and is separated from the gas under the action of inertial separation and discharged through the bottom opening of the coalescence layer. 3) The gas carrying fine droplets passes through the coalescing layer, the gas phase is discharged from the gas outlet, and the retained liquid phase is discharged from the liquid outlet.