WO2018105563A1 - 気液分離装置 - Google Patents
気液分離装置 Download PDFInfo
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- WO2018105563A1 WO2018105563A1 PCT/JP2017/043506 JP2017043506W WO2018105563A1 WO 2018105563 A1 WO2018105563 A1 WO 2018105563A1 JP 2017043506 W JP2017043506 W JP 2017043506W WO 2018105563 A1 WO2018105563 A1 WO 2018105563A1
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- WIPO (PCT)
- Prior art keywords
- gas
- liquid
- pipe
- peripheral surface
- inlet pipe
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
- B01D45/14—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by rotating vanes, discs, drums or brushes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/04—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
- B01D45/08—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by impingement against baffle separators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C3/00—Apparatus in which the axial direction of the vortex flow following a screw-thread type line remains unchanged ; Devices in which one of the two discharge ducts returns centrally through the vortex chamber, a reverse-flow vortex being prevented by bulkheads in the central discharge duct
- B04C3/02—Apparatus in which the axial direction of the vortex flow following a screw-thread type line remains unchanged ; Devices in which one of the two discharge ducts returns centrally through the vortex chamber, a reverse-flow vortex being prevented by bulkheads in the central discharge duct with heating or cooling, e.g. quenching, means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C3/00—Apparatus in which the axial direction of the vortex flow following a screw-thread type line remains unchanged ; Devices in which one of the two discharge ducts returns centrally through the vortex chamber, a reverse-flow vortex being prevented by bulkheads in the central discharge duct
- B04C3/06—Construction of inlets or outlets to the vortex chamber
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C3/00—Apparatus in which the axial direction of the vortex flow following a screw-thread type line remains unchanged ; Devices in which one of the two discharge ducts returns centrally through the vortex chamber, a reverse-flow vortex being prevented by bulkheads in the central discharge duct
- B04C2003/003—Shapes or dimensions of vortex chambers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C3/00—Apparatus in which the axial direction of the vortex flow following a screw-thread type line remains unchanged ; Devices in which one of the two discharge ducts returns centrally through the vortex chamber, a reverse-flow vortex being prevented by bulkheads in the central discharge duct
- B04C2003/006—Construction of elements by which the vortex flow is generated or degenerated
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/02—EGR systems specially adapted for supercharged engines
- F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
- F02M26/05—High pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust system upstream of the turbine and reintroduced into the intake system downstream of the compressor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Definitions
- the present invention relates to a gas-liquid separator that separates gas and liquid contained in a gas-liquid two-phase fluid.
- the gas-liquid two-phase fluid flowing in the pipe is swirled, and the liquid is separated from the gas by guiding the liquid to the inner peripheral surface of the pipe by centrifugal force to form liquid droplets.
- Gas-liquid separation devices that discharge outside are known (see, for example, Patent Document 1, Patent Document 2, and Patent Document 3).
- the present invention has been made paying attention to the above-mentioned problem, and it is possible to prevent liquid droplets from flowing together with gas when the gas-liquid two-phase fluid is swirled and gas-liquid separated while suppressing enlargement of the apparatus. It is an object of the present invention to provide a gas-liquid separator that can be prevented.
- the present invention comprises a pipe through which a gas-liquid two-phase fluid flows, and a swirl flow generating means arranged inside the pipe to swirl the gas-liquid two-phase fluid along the inner peripheral surface of the pipe. It is a gas-liquid separator provided.
- a first step surface having a larger inner diameter dimension toward the downstream side is formed on the inner peripheral surface on the downstream side in the flow direction of the gas-liquid two-phase fluid than the swirling flow generating means. .
- FIG. 1 is an overall system diagram showing an exhaust gas recirculation system for an internal combustion engine to which a gas-liquid separator according to a first embodiment is applied. It is sectional drawing which shows the gas-liquid separator of Example 1.
- FIG. It is an enlarged view of the A section shown in FIG. It is an enlarged view of the B section shown in FIG. It is a perspective view which shows the swirl
- FIG. 6 is a sectional view taken along the line CC in FIG. It is explanatory drawing which shows the gas-liquid two-phase fluid in the gas-liquid separation apparatus of Example 1, and the flow of the isolate
- FIG. It is an enlarged view of the A1 part shown in FIG. It is sectional drawing which shows the gas-liquid separator of Example 2. It is explanatory drawing which shows the gas-liquid two-phase fluid in the gas-liquid separation apparatus of Example 2, and the flow of the isolate
- FIG. It is sectional drawing which shows the 1st modification of the gas-liquid separation apparatus of Example 1.
- FIG. It is sectional drawing which shows the 2nd modification of the gas-liquid separation apparatus of Example 1.
- FIG. It is sectional drawing which shows the 3rd modification of the gas-liquid separation apparatus of Example 1.
- FIG. It is sectional drawing which shows the 4th modification of the gas-liquid separation apparatus of Example 1.
- FIG. is sectional drawing which shows the 1st modification of the gas-liquid separation apparatus of Example 1.
- FIG. It is sectional drawing which shows the 2nd modification of the gas-liquid separation apparatus of Example 1.
- FIG. It
- FIG. 1 It is sectional drawing which shows the 5th modification of the gas-liquid separation apparatus of Example 1.
- FIG. 2 It is sectional drawing to which the principal part which shows the 6th modification of the gas-liquid separation apparatus of Example 1 was expanded. It is sectional drawing which shows the 1st modification of the gas-liquid separation apparatus of Example 2.
- FIG. 2 It is sectional drawing which shows the 2nd modification of the gas-liquid separation apparatus of Example 2.
- Example 1 First, the configuration of the gas-liquid separation device according to the first embodiment will be described by dividing it into “the overall system configuration of the application example”, “the detailed configuration of the gas-liquid separation device”, and “the detailed configuration of the swirling flow generating ribbon”.
- FIG. 1 is an overall system diagram showing an exhaust gas recirculation system for an internal combustion engine to which a gas-liquid separator according to a first embodiment is applied.
- the overall system configuration of an application example of the first embodiment will be described below with reference to FIG.
- the gas-liquid separator 20 of Example 1 is applied to the exhaust gas recirculation system S of the internal combustion engine 1 shown in FIG.
- the internal combustion engine 1 shown in FIG. 1 is a diesel engine mounted on a vehicle as a driving source for traveling, and has four cylinders (not shown). An intake passage 2 and an exhaust passage 3 are connected to each cylinder.
- the intake passage 2 is formed with an intake port 2a at an end, and in order from the intake port 2a side, an air filter 4 for intake filtration, a compressor 5a of a turbocharger 5, an intercooler 6 for cooling intake air, and an intake air amount
- a throttle valve 7 is provided for adjusting.
- a turbine 5b of the turbocharger 5 an exhaust purification catalyst 8 for purifying exhaust, and an exhaust throttle valve 9 for adjusting the exhaust flow rate are provided in this order from the internal combustion engine 1 side.
- a muffler 10 is provided on the downstream side of the exhaust throttle valve 9, and an exhaust port 3a is formed at the end thereof.
- EGR exhaust Gas Recirculation
- exhaust gas recirculation is a technique in which a part of exhaust gas after combustion in the internal combustion engine 1 is taken out and re-intaked, and is also referred to as exhaust gas recirculation.
- the low pressure EGR passage 11 connects the intake passage 2 upstream of the compressor 5 a and the exhaust passage 3 downstream of the exhaust purification catalyst 8.
- the high pressure EGR passage 12 connects the intake passage 2 downstream of the compressor 5a and the exhaust passage 3 upstream of the turbine 5b.
- the low-pressure EGR passage 11 has an EGR cooler 13 for cooling the exhaust led to the intake passage 2 and a low-pressure EGR for adjusting the flow rate of the exhaust gas recirculated to the intake passage 2 through the low-pressure EGR passage 11. And a valve 14.
- the high pressure EGR passage 12 is provided with a high pressure EGR valve 15 for adjusting the flow rate of the exhaust gas recirculated to the intake passage 2 through the high pressure EGR passage 12.
- the exhaust gas can be recirculated without reducing the exhaust amount passing through the turbine 5b of the turbocharger 5, and the NOx reduction effect is great.
- the gas-liquid separator 20 shown in FIG. 2 is positioned downstream of the low-pressure EGR valve 14 and upstream of the compressor 5a of the turbocharger 5 (position surrounded by a one-dot chain line X in FIG. 1). ) To evaporate the condensed water as droplets.
- FIG. 2 is a cross-sectional view illustrating the gas-liquid separator according to the first embodiment.
- the detailed structure of the gas-liquid separation apparatus 20 of Example 1 is demonstrated.
- the gas-liquid separator 20 includes an inlet pipe 21 (piping), an inner pipe 22 (piping), and a swirling flow generating ribbon 30 (swirling flow generating means). Yes.
- the inlet pipe 21 has an upstream end (right side in FIG. 2) that communicates with the intake port 2a and the low-pressure EGR valve 14, and the exhaust (hereinafter referred to as " Gas-liquid two-phase fluid ”) flows in.
- a swirl flow generating ribbon 30 that swirls the flow of the gas-liquid two-phase fluid along the inner peripheral surface 21b is disposed inside the inlet pipe 21.
- an exhaust port 21a opened in the axial direction is formed at the downstream end portion (left side in FIG. 2) of the inlet pipe 21.
- a tapered surface 21c and an annular groove 21d are formed in order from the upstream side along the flow direction of the gas-liquid two-phase fluid.
- the tapered surface 21 c is an inclined surface that gradually increases the inner diameter of the inlet pipe 21 toward the downstream side in the flow direction of the gas-liquid two-phase fluid, and the flow of the gas-liquid two-phase fluid more than the swirling flow generating ribbon 30. It is formed at a position downstream in the direction. Thereby, the inner diameter dimension of the inlet pipe 21 is the smallest in the first region 23A on the upstream side in the flow direction of the gas-liquid two-phase fluid from the tapered surface 21c, and in the second region 23B in which the tapered surface 21c is formed. The size gradually increases, and the third region 23C, which is downstream of the tapered surface 21c in the flow direction of the gas-liquid two-phase fluid, becomes the largest.
- a swirl flow generating ribbon 30 is disposed in the first region 23A, and an exhaust port 21a is formed in the third region 23C.
- the annular groove 21d is an annular recess extending along the circumferential direction of the inlet pipe 21, and is provided at a position further downstream from the tapered surface 21c, that is, in the third region 23C.
- the annular groove 21d has a first step surface 41, a second step surface 42, and a bottom surface 43 as shown in an enlarged view in FIG.
- step difference surface 41 is a surface located in the upstream of the flow direction of a gas-liquid two-phase fluid in the surface which forms the annular groove part 21d. Due to the first step surface 41, the inner diameter of the inlet pipe 21 increases stepwise toward the downstream side in the flow direction of the gas-liquid two-phase fluid. That is, the inlet pipe 21 has a larger inner diameter dimension D2 at a position inside the annular groove 21d than an inner diameter dimension D1 at a position upstream of the annular groove 21d. Further, the angle ⁇ 1 formed by the first step surface 41 and the inner peripheral surface 211b on the upstream side of the first step surface 41 is set to 90 ° here.
- step difference surface 42 is a surface located in the downstream of the flow direction of a gas-liquid two-phase fluid in the surface which forms the annular groove part 21d. Due to the second step surface 42, the inner diameter of the inlet pipe 21 decreases stepwise toward the downstream side in the gas-liquid two-phase fluid flow direction. That is, the inlet pipe 21 has a larger inner diameter dimension D2 at a position inside the annular groove portion 21d than an inner diameter dimension D3 at a position downstream of the annular groove portion 21d.
- the angle ⁇ 2 formed by the second step surface 42 and the inner peripheral surface 212b on the downstream side of the second step surface 42 is set to 90 ° here.
- the height dimension H2 of the second step surface 42 is set to be the same as the height dimension H1 of the first step surface 41.
- the bottom surface 43 is a surface that extends in the circumferential direction of the inlet pipe 21 and serves as a bottom surface of the annular groove portion 21d, and is located between the first step surface 41 and the second step surface 42.
- the inner pipe 22 is formed of a straight pipe member having an outer diameter smaller than the minimum inner diameter of the third region 23 ⁇ / b> C of the inlet pipe 21, and one end 22 a is inserted into the exhaust port 21 a of the inlet pipe 21. Installed coaxially.
- the one end 22a is formed with an opening 22b that is opened downstream of the swirling flow generating ribbon 30 in the flow direction of the gas-liquid two-phase fluid. Further, the downstream end (the left side in FIG. 2) of the inner pipe 22 communicates with the compressor 5 a of the turbocharger 5.
- the opening 22b is open in the axial direction of the inner pipe 22. That is, the inlet pipe 21, the inner pipe 22, the exhaust port 21a, and the opening 22b are coaxial.
- each annular groove 22d is an annular recess extending along the circumferential direction of the inner pipe 22, and is located in the inner pipe 22, that is, at a position downstream of the swirling flow generating ribbon 30 in the flow direction of the gas-liquid two-phase fluid. Is provided.
- one of the two annular groove portions 22 d is formed at a portion inserted into the inlet pipe 21, and the other is formed at a portion protruding from the inlet pipe 21.
- Each annular groove 22d has a first step surface 44, a second step surface 45, and a bottom surface 46, as shown in an enlarged view in FIG.
- step difference surface 44 is a surface located in the upstream of the flow direction of a gas-liquid two-phase fluid in the surface which forms the annular groove part 22d. Due to the first step surface 44, the inner diameter of the inner pipe 22 increases stepwise toward the downstream side in the flow direction of the gas-liquid two-phase fluid. That is, the inner pipe 22 has a larger inner diameter dimension D5 at a position inside the annular groove portion 22d than an inner diameter dimension D4 at a position upstream of the annular groove portion 22d. In addition, an angle ⁇ 3 formed by the first step surface 44 and the inner peripheral surface 221c upstream of the first step surface 44 is set to 90 ° here.
- step difference surface 45 is a surface located in the downstream of the flow direction of a gas-liquid two-phase fluid in the surface which forms the annular groove part 22d. Due to the second step surface 45, the inner diameter of the inner pipe 22 decreases stepwise toward the downstream side in the flow direction of the gas-liquid two-phase fluid. That is, the inner pipe 22 has a larger inner diameter dimension D5 at a position inside the annular groove 22d than an inner diameter dimension D6 at a position downstream of the annular groove 22d.
- the angle ⁇ 4 formed by the second step surface 45 and the inner peripheral surface 222c on the downstream side of the second step surface 45 is set to 90 ° here.
- the height dimension H4 of the second step surface 45 is set to the same dimension as the height dimension H3 of the first step surface 44.
- the bottom surface 46 is a surface that extends in the circumferential direction of the inner pipe 22 and serves as the bottom surface of the annular groove portion 22 d, and is located between the first step surface 44 and the second step surface 45.
- a spacer 24 that closes the gap ⁇ generated between the inner peripheral surface 21 b and the inner pipe 22 is fitted into the exhaust port 21 a of the inlet pipe 21.
- the spacer 24 has a cylindrical shape surrounding the entire circumference of the inner pipe 22, the outer peripheral surface is in airtight contact with the inner peripheral surface 21 b of the inlet pipe 21, and the inner peripheral surface is in an airtight state with the outer peripheral surface of the inner pipe 22. In contact.
- FIG. 5 is a perspective view showing a swirl flow generating ribbon of Example 1
- FIG. 6 is a side view of the swirl flow generating ribbon.
- FIG. 7 is a cross-sectional view taken along the line CC in FIG. The detailed configuration of the swirling flow generating ribbon of the first embodiment will be described below with reference to FIGS.
- the swirl flow generating ribbon 30 is formed of a strip-shaped plate member that is spirally twisted, and is disposed in the first region 23 ⁇ / b> A of the inlet pipe 21.
- the swirl flow generating ribbon 30 has a radial dimension RR (see FIG. 6) set to be equal to the inner diameter dimension of the first region 23A, is installed coaxially with the inlet pipe 21, and has a peripheral edge with the inlet pipe 21. In contact with the inner peripheral surface 21b.
- the swirl flow generating ribbon 30 has a first end point 31a, a second end point 31b, and a center end point 31c at a terminal end 31 on the outflow side of the gas-liquid two-phase fluid, and a first end edge. 32a and a second end edge 32b are formed.
- the first end point 31 a is set to one of the radially outer ends of the swirl flow generating ribbon 30.
- the second terminal point 31 b is set to the other of the terminal ends on the radially outer side of the swirling flow generating ribbon 30.
- the axial position of the first terminal point 31a coincides with the axial position of the second terminal point 31b, and the terminal line L connecting the first terminal point 31a and the second terminal point 31b is turned.
- the center terminal point 31c is set on the axis O of the swirling flow generating ribbon 30, and is set closer to the inflow side of the gas-liquid two-phase fluid than the first terminal point 31a and the second terminal point 31b.
- the first edge 32 a is an edge connecting the first terminal point 31 a and the center terminal point 31 c among the terminal edges of the swirl flow generating ribbon 30.
- the second end edge 32 b is an end edge connecting the second end point 31 b and the center end point 31 c among the end edges of the swirl flow generating ribbon 30.
- the end portion 31 of the swirling flow generating ribbon 30 is provided with a space region cut out in a V shape surrounded by the first end edge 32a, the second end edge 32b, and the end line L.
- the swirling flow generating ribbon 30 is formed with a folded structure 33 that is folded on the inflow side of the gas-liquid two-phase fluid at each of the first end edge 32a and the second end edge 32b.
- the folded structure 33 includes a first folded piece 33 a in which the tips of the first end edge 32 a and the second end edge 32 b are folded back to the one spiral surface 30 a side of the swirl flow generating ribbon 30, And a second folded piece 33b in which the tips of the end edge 32a and the second end edge 32b are folded back to the opposite spiral surface 30b side.
- the folded structure 33 is formed between the center terminal point 31c and the first terminal point 31a, and between the center terminal point 31c and the second terminal point 31b. As a result, a gap ⁇ is generated between both radial ends of the folded structure 33 and the inner peripheral surface 21b of the inlet pipe 21 (see FIG. 2).
- the swirl flow generating ribbon 30 is disposed in the first region 23A, at least the first terminal point 31a and the second terminal point 31b of the terminal portion 31 are regions where the tapered surface 21c is formed, that is, the first terminal point 31b. 2 is inserted into the area 23B.
- the start end 34 of the swirling flow generating ribbon 30 on the inflow side of the gas-liquid two-phase fluid has a first start end point 34a, a second start end point 34b, and a center start end point 34c.
- the first starting point 34 a is set to one of the starting ends on the radially outer side of the swirling flow generating ribbon 30.
- the second starting end point 34 b is set to the other of the starting ends on the radially outer side of the swirling flow generating ribbon 30.
- the center start end point 34c is on the axis O of the swirling flow generating ribbon 30, and the first start end point 34a and the second start end point 34b coincide with the axial position.
- the center start point 34c is set on the intersection of the start line connecting the first start point 34a and the second start point 34b and the axis O, and the first and second start points 34a, 34b and the center start point 34c. Are aligned along the radial direction of the swirl flow generating ribbon 30. Further, the starting end portion 34 of the swirling flow generating ribbon 30 is erected along the direction of gravity.
- the operation of the gas-liquid separation device according to the first embodiment is divided into “droplet evaporation operation on the first step surface”, “droplet holding operation on the second step surface”, and “other characteristic operations”. I will explain.
- FIG. 8 is an explanatory diagram illustrating a gas-liquid two-phase fluid and separated gas / liquid flows in the gas-liquid separator according to the first embodiment.
- the outside air taken in from the intake port 2a and the exhaust taken in from the exhaust passage 3 through the low-pressure EGR passage 11 are turbocharged at a flow rate of 10 m / s to 100 m / s. It flows into the compressor 5a of the feeder 5. At this time, moisture is contained in the outside air and exhaust, and when this gas is cooled by the EGR cooler 13, the moisture is condensed to form a particulate liquid as condensed water, and the liquid is mixed with a gas such as air. It becomes a combined gas-liquid two-phase fluid.
- the liquid guided toward the inner peripheral surface 21b aggregates into droplets and is separated from the gas. Then, the liquid (hereinafter referred to as “droplet”) separated from the gas by forming into droplets is attached to the inner peripheral surface 21b from the second region 23B to the third region 23C by the flow of the swirl flow. It flows.
- annular groove 21d is formed on the inner peripheral surface 21b of the inlet pipe 21 in the third region 23C. Therefore, the droplet that has flowed into the third region 23C due to the flow of the swirl flow while adhering to the inner peripheral surface 21b enters the annular groove 21d together with the gas that has turned into the swirl flow.
- the bottom surface 43 of the annular groove 21 d extends in the circumferential direction of the inlet pipe 21. Therefore, the gas that has turned into the swirl flows in the circumferential direction along the bottom surface 43 inside the annular groove 21 d. Further, the droplet W remaining in the annular groove portion 21d also flows along the bottom surface 43 in the annular groove portion 21d together with the swirling gas. That is, the gas and the droplet W swirl along the bottom surface 43 in the annular groove 21d. The droplet W evaporates by continuing the rotation along the bottom surface 43.
- the liquid (droplet W) that has been formed into droplets and separated from the gas is swirled in the annular groove portion 21d and evaporated while being drawn to the first step surface 41.
- the droplet W does not flow down to the downstream side in the flow direction of the gas-liquid two-phase fluid, and the droplet W can be prevented from flowing into the inner pipe 22 together with the gas.
- the gas-liquid separation apparatus 20 of Example 1 since it becomes unnecessary to discharge and collect the droplet W out of the inlet pipe 21, the enlargement of the apparatus can be suppressed.
- a plurality of (here, two) annular groove portions 22d are also formed on the inner peripheral surface 22c of the inner pipe 22. Therefore, even if the liquid that could not be separated from the gas or the liquid droplet that could not be evaporated flows together with the gas from the opening 22b into the inner pipe 22, these liquids and the like remain in the inner pipe 22. Is agglomerated by being guided to the inner peripheral surface 22c by the gas flowing through the gas. And if it flows while adhering to the inner peripheral surface 22c in a droplet state, it enters the annular groove 22d.
- the liquid droplets that have entered the annular groove 22d are attracted to the negative pressure region generated along the first step surface 44 of the annular groove 22d, as in the case of the inlet pipe 21, and the annular groove 22d. Stay inside. Then, the liquid droplet remaining in the annular groove 22d flows in the circumferential direction along the bottom surface 46 together with the swirling gas, and swirls along the bottom surface 46 in the annular groove 22d. The droplets evaporate by continuing the swirling along the bottom surface 46. As a result, in the gas-liquid separator 20, it is possible to prevent the liquid from flowing in the form of liquid droplets downstream of the annular groove 22d to the downstream side of the gas-liquid two-phase fluid.
- the inner pipe 22 is also provided with the annular groove portion 22d having the first step surface 44, so that the liquid that has been formed into droplets into the inner pipe 22 together with the gas. Even if it flows, the liquid droplets remain in the vicinity of the first step surface 44 of the annular groove 22d and gradually evaporate. Thereby, it is not necessary to collect the liquid droplets, and the size of the apparatus can be suppressed. Further, since the droplets are evaporated and vaporized, it is possible to prevent the droplets from flowing into the inner pipe 22 together with the gas.
- the annular groove portion 21 d formed in the inlet pipe 21 and the annular groove portion 22 d formed in the inner pipe 22 are both more gas-liquid two than the first step surfaces 41 and 44. It has the 2nd level
- the gas-liquid separation device 20 can prevent the droplet W from flowing downstream from the annular groove 21d by the second step surface 42. Therefore, in this gas-liquid separator 20, the liquid droplet W stays inside the annular groove portion 21d to evaporate, and the flow of the liquid as the liquid droplet W can be suppressed.
- the liquid droplets that have entered the annular groove 22d are moved downstream by the swirl flow to the first side. Even if it is separated from the step surface 44, the movement is blocked by the second step surface 45 and can remain in the annular groove 22d. For this reason, the second step surface 45 can prevent the droplet W from flowing downstream from the annular groove 22d. The droplet W stays inside the annular groove 22d to evaporate, and the droplet W The flow of the liquid as it is can be suppressed.
- annular groove portion 21 d having a first step surface 41 and a second step surface 42 is formed on the inner peripheral surface 21 b of the inlet pipe 21.
- An annular groove 22 d having a surface 44 and a second step surface 45 is formed on the inner peripheral surface 22 c of the inner pipe 22. That is, the first step surfaces 41 and 44 are formed on both the inlet pipe 21 and the inner pipe 22.
- this gas-liquid separation device 20 first, the liquid separated from the gas by rotating the gas-liquid two-phase fluid is separated into the first step surface 41 of the annular groove 21 d in the inlet pipe 21. Let it stay in the vicinity and evaporate. On the other hand, when the liquid that could not be separated from the gas or the liquid droplet that could not be evaporated flowed into the inner pipe 22, it stays in the vicinity of the first step surface 44 of the annular groove 22d formed in the inner pipe 22, Can be evaporated.
- the gas-liquid separation device 20 can evaporate liquid droplets in two places, that is, the inlet pipe 21 and the inner pipe 22, and the liquid remains as a liquid droplet. Can be further prevented from flowing down together with the gas, and the vaporization rate of the droplets can be improved.
- the pipe (inlet pipe 21) is arranged on the inner peripheral surface 21b on the downstream side in the flow direction of the gas-liquid two-phase fluid with respect to the swirling flow generating means (the swirling flow generating ribbon 30).
- the first step surface 41 having a larger inner diameter of the inlet pipe 21) is formed.
- the swirling flow generating means (the swirling flow generating ribbon 30) is disposed inside, and the flow direction of the gas-liquid two-phase fluid is more than that of the swirling flow generating means (the swirling flow generating ribbon 30).
- An inlet pipe 21 having an exhaust port 21a formed at a position downstream thereof, and one end thereof is inserted into the exhaust port 21a, and the gas-liquid two-phase fluid is more than the swirl flow generating means (the swirl flow generating ribbon 30).
- An inner pipe 22 having an opening 22b opened at a downstream position in the flow direction,
- the first step surfaces 41 and 44 are formed on both the inner peripheral surface 21 b of the inlet pipe 21 and the inner peripheral surface 22 c of the inner pipe 22.
- Example 2 The gas-liquid separator of Example 2 is an example in which a protrusion extending in the circumferential direction is formed on the outer peripheral surface of the inner pipe inserted into the inlet pipe, and heating means for the outer peripheral surface of the inner pipe is provided. .
- FIG. 10 is a cross-sectional view illustrating the gas-liquid separator according to the second embodiment.
- the structure of the gas-liquid separation apparatus of Example 2 is demonstrated.
- symbol same as Example 1 is attached
- subjected and detailed description is abbreviate
- the gas-liquid separator 50 includes an inlet pipe 21 (pipe) into which a gas-liquid two-phase fluid flows, and an inner pipe 51 in which one end 51 a is inserted into the exhaust port 21 a of the inlet pipe 21. (Piping) and a swirl flow generating ribbon 30 (swirl flow generating means) disposed inside the inlet pipe 21.
- the inner pipe 51 is formed of a straight pipe member having an outer diameter smaller than the minimum inner diameter of the third region 23C of the inlet pipe 21, and is installed coaxially with the inlet pipe 21. Accordingly, a gap ⁇ is generated between the outer peripheral surface 52b of the inner pipe 51 and the inner peripheral surface 21b of the inlet pipe 21. Further, an opening that opens in the axial direction of the inner pipe 51 at a position downstream of the swirl flow generating ribbon 30 in the flow direction of the gas-liquid two-phase fluid is provided at one end 51 a of the inner pipe 51 inserted into the inlet pipe 21. 51b is formed. Further, the downstream end (left side in FIG. 13) of the inner pipe 51 communicates with a turbocharger compressor (not shown).
- a plurality of annular groove portions 53 (two here) extending along the circumferential direction of the inner pipe 51 are formed on the inner peripheral surface 52 a of the inner pipe 51.
- Each annular groove 53 has a first step surface 53a, a second step surface 53b, and a bottom surface 53c, and has the same configuration as the annular groove 22d in the first embodiment. Is omitted.
- a protrusion 54 is formed at a portion inserted into the inlet pipe 21, and a heating electric heating sheet 55 (heating means) is provided at a portion protruding from the inlet pipe 21. Is provided.
- the protrusion 54 is a protrusion that protrudes outward in the radial direction from the surface of the outer peripheral surface 52b, extends in the circumferential direction of the inner pipe 51, and surrounds the entire periphery of the outer peripheral surface 52b.
- the protrusion 54 is formed between the opening 51 b formed at one end 51 a of the inner pipe 51 and the spacer 24 fitted to the exhaust port 21 a of the inlet pipe 21.
- the height dimension H5 of this projection part 54 is set so that it may become smaller than the clearance dimension H6 of the inner peripheral surface 21b of the inlet pipe 21, and the outer peripheral surface 52b of the inner pipe 51.
- a gap is generated between the front end surface 54 a of the protrusion 54 and the inner peripheral surface 21 b of the inlet pipe 21.
- the heating electric heating sheet 55 is a flexible sheet provided with a heating wire that generates heat when a switch (not shown) is turned on.
- the heating electric sheet 55 is wound around the inner pipe 51 and covers the outer peripheral surface 52b. And the outer peripheral surface 52b of the inner pipe 51 is heated because the heating wire provided in this heating heating sheet 55 generates heat.
- one of the two annular grooves 53 formed in the inner pipe 51 is formed on the inner peripheral surface 52 a of the portion inserted into the inlet pipe 21, and the other is formed from the inlet pipe 21. It is formed on the inner peripheral surface 52a of the protruding portion. Therefore, the heating electrothermal sheet 55 heats the outer peripheral surface 52b of the portion where the annular groove 53 (first step surface 53a) is formed.
- FIG. 11 is an explanatory diagram illustrating a gas-liquid two-phase fluid and separated gas / liquid flows in the gas-liquid separator according to the second embodiment.
- the operation of the second embodiment will be described with reference to FIG.
- the gas-liquid two-phase fluid that flows inside the inlet pipe 21 flows along the swirl flow generating ribbon 30 to form a swirl flow. It is guided toward the inner peripheral surface 21b of the pipe 21 and aggregates into droplets. Then, the liquid that has become droplets flows from the second region 23B to the third region 23C by the flow of the swirl flow while adhering to the inner peripheral surface 21b.
- the droplet that has flowed into the third region 23C flows into the annular groove 21d formed on the inner peripheral surface 21b of the inlet pipe 21, and remains in the annular groove 21d and continues to turn as in the case of the first embodiment. It will evaporate.
- gas that did not flow into the inner pipe 51 also flows between the inlet pipe 21 and the inner pipe 51.
- the gas flowing between the inlet pipe 21 and the inner pipe 51 is blocked by the spacer 24 and cannot escape. Therefore, although this gas flows as a swirl flow along the inner peripheral surface 21 b of the inlet pipe 21, it collides with the spacer 24, and thereby flows backward along the outer peripheral surface 52 b of the inner pipe 51. Heading to the opening 51b.
- the droplet W that flows downstream from the annular groove 21d and flows between the inlet pipe 21 and the inner pipe 51 also flows along the inner peripheral surface 21b of the inlet pipe 21 by the gas flow. Then, after colliding with the spacer 24, it goes to the opening 51b along the outer peripheral surface 52b of the inner pipe 51.
- the protruding portion 54 is formed on the outer peripheral surface 52b of the inner pipe 51 in the portion inserted into the inlet pipe 21.
- the gas-liquid separator 50 of the second embodiment as shown in FIG. 11, the outer peripheral surface 52 b of the inner pipe 51 protruding from the inlet pipe 21 is covered with the heating electric heating sheet 55. Therefore, the gas-liquid separator 50 can heat the outer peripheral surface 52b of the inner pipe 51 by turning on the heating electric heating sheet 55 to generate heat.
- the temperature inside the inner pipe 51 protruding from the inlet pipe 21 can be increased, and the evaporation of the liquid flowing into the inner pipe 51 together with the gas can be promoted.
- the gas-liquid separation device 50 can evaporate and vaporize the droplets that have flowed into the inner pipe 51, further preventing the liquid as droplets from flowing down with the gas, The vaporization rate can be improved.
- the first step surface 53a is also formed on the portion of the inner peripheral surface 52a of the inner pipe 51 that protrudes from the inlet pipe 21 covered with the heating electrothermal sheet 55.
- An annular groove 53 is formed. That is, in the inner pipe 51, the outer peripheral surface 52 b of the portion where the annular groove 53 is formed is heated by the heating electric heating sheet 55.
- the evaporation of the droplets remaining in the vicinity of the first step surface 53a of the annular groove 53 can be promoted, and the evaporation of the droplets flowing into the inner pipe 51 can be accelerated. This can be performed efficiently, and the drop removal rate can be further improved.
- a gap ⁇ is provided between the outer peripheral surface 52b of the inner pipe 51 and the inner peripheral surface 21b of the inlet pipe 21, and the inner pipe 51 is an outer periphery of a portion inserted into the inlet pipe 21.
- a protrusion 54 extending in the circumferential direction is formed on the surface 52b.
- the piping (inner pipe 51) is provided with a heating means (heating heating sheet 55) for heating the outer peripheral surface 52b.
- the heating means (heating heating sheet 55) is configured to heat the outer peripheral surface 52b of the portion where the first step surface 53a is formed in the pipe (inner pipe 51).
- an annular groove portion is not formed on the inner peripheral surface 21b of the inlet pipe 21, and the first step surface 44 is provided only on the inner peripheral surface 22c of the inner pipe 22.
- the groove 22d may be formed. Further, as shown in FIG. 13A
- annular groove 21d having a first step surface 41 is formed only on the inner peripheral surface 21b of the inlet pipe 21, and the gas-liquid does not form an annular groove on the inner peripheral surface 22c of the inner pipe 22.
- the separation device 20B may be used.
- the first step surface is formed on at least one inner peripheral surface 21b, 22c of the inlet pipe 21 or the inner pipe 22, the liquid separated from the gas-liquid two-phase fluid is allowed to stay in the vicinity of the first step surface. Evaporation can prevent the liquid from flowing down as droplets.
- annular groove 21d having the first step surface 41 is formed only on the inner peripheral surface 21b of the inlet pipe 21, it is not necessary to provide the inner pipe as in the gas-liquid separator 20C shown in FIG. 13C. In this case, there is no exhaust port into which the inner pipe is inserted, and the end of the inlet pipe 21 connected to a turbocharger (not shown) corresponds to the exhaust port.
- the annular groove portion 21 d formed in the inlet pipe 21 is located downstream of the swirl flow generating ribbon 30 and upstream of the opening 22 b of the inner pipe 22.
- the example formed is shown.
- the annular groove 21d may be formed at a position downstream of the opening 22b of the inner pipe 22, that is, a position surrounding the periphery of the inner pipe 22. At this time, since the droplets are evaporated on the downstream side of the opening 22b of the inner pipe 22, even if the droplets that have become smaller during the evaporation are blown off by the gas force, the droplets enter the inner pipe 22. Can be prevented.
- the annular groove part 21d formed in the inner peripheral surface 21b of the inlet pipe 21 showed the example which has the 1st step surface 41,44 and the 2nd step surface 42,45.
- the example in which the annular groove portion 22d formed on the inner peripheral surface 22c of the inner pipe 22 also has the first step surface 44 and the second step surface 45 is shown.
- the present invention is not limited to this, as in the gas-liquid separator 20E shown in FIG. Only the first step surface 41A having an inner diameter dimension that increases toward the side may be formed.
- a negative pressure region is generated along the first step surface 41A, and the liquid droplets stay in the vicinity of the first step surface 41A and are swirled in the circumferential direction to evaporate.
- the first step surface may be formed on at least one of the inner peripheral surface 21 b of the inlet pipe 21 or the inner peripheral surface 22 c of the inner pipe 22.
- a plurality of first step surfaces may be formed on the inner peripheral surfaces 21b and 22c of the inlet pipe 21 and the inner pipe 22 along the flow direction of the gas-liquid two-phase fluid.
- the inner diameter of the pipe such as the inlet pipe 21 may be increased a plurality of times in a stepped manner.
- the liquid droplets can remain in the vicinity of each of the plurality of first step surfaces and can be evaporated, the liquid droplets can be evaporated in a plurality of times. The vaporization rate of the droplets can be improved.
- the angle ⁇ 1 formed between the first step surface 41 formed on the inlet pipe 21 and the inner peripheral surface 211b on the upstream side of the first step surface 41 is set to 90 °
- the inner The example in which the angle ⁇ 3 formed by the first step surface 44 formed on the pipe 22 and the inner peripheral surface 221c upstream of the first step surface 44 is set to 90 ° is shown.
- the angles ⁇ 1 and ⁇ 3 may be angles that allow the negative pressure region H to be formed along the first step surfaces 41 and 44. That is, the angles ⁇ 1 and ⁇ 3 may be set to an acute angle of 90 ° or less as shown in FIG. 15 (note that only the annular groove 21d is shown in FIG. The same applies to the groove 22d).
- the angle ⁇ 2 formed by the second step surface 42 formed on the inlet pipe 21 and the inner peripheral surface 212b on the downstream side of the second step surface 42 is 90.
- An example in which the angle ⁇ 4 formed between the second step surface 45 formed on the inner pipe 22 and the inner peripheral surface 222c on the downstream side of the second step surface 45 is set to 90 °.
- the angles ⁇ 2 and ⁇ 4 may be angles that can prevent the liquid droplets in the annular grooves 21d and 22d from moving along the second step surfaces 42 and 45 to the downstream side. That is, the angle ⁇ 2 and the angle ⁇ 4 may be set to an acute angle of 90 ° or less as shown in FIG. 15 (note that only the annular groove portion 21d is shown in FIG. The same applies to the groove 22d).
- the axial position of the annular groove portion 53 formed on the inner peripheral surface 52a of the inner pipe 51 and the protrusion portion 54 formed on the outer peripheral surface 52b of the inner pipe 51 are shifted.
- the present invention is not limited to this, and the annular groove portion 53 and the protruding portion are protruded outward by projecting the recessed portion of the inner peripheral surface 52a of the inner pipe 51, for example, as in the gas-liquid separator 20F shown in FIG.
- the position in the axial direction of 54 may be matched. In this case, the annular groove 53 and the protrusion 54 can be formed at the same time, and a decrease in the thickness of the inner pipe 51 due to the formation of the annular groove 53 can be suppressed.
- Example 2 although the example which provided the electrothermal sheet
- the inlet pipe 21 may be covered with a heating electric heating sheet 55, and the outer peripheral surface 21e of the inlet pipe 21 may be heated. In this case, the temperature in the inlet pipe 21 rises, and the evaporation of the liquid contained in the gas-liquid two-phase fluid is promoted inside the inlet pipe 21.
- Example 2 although the example which uses the heating electrothermal sheet 55 which has flexibility as a heating means which heats the outer peripheral surface 52b of the inner pipe 51 was shown, it is not restricted to this.
- the heating means only needs to be able to heat the outer peripheral surfaces of the pipes such as the inlet pipe 21 and the inner pipe 51.
- the pipe to be heated such as the inlet pipe, has a double pipe structure, and high-temperature exhaust gas is provided between the double pipes. May be circulated to heat the piping. That is, the heating means may have a double pipe structure using an exhaust gas circulation structure.
- the gas-liquid separator 20 In the exhaust gas recirculation system S, the gas-liquid separator 20 according to the first embodiment is located downstream of the low-pressure EGR valve 14 and upstream of the compressor 5a of the turbocharger 5 (indicated by a one-dot chain line X in FIG. 1). Although the example which installs in the surrounding position was shown, it is not restricted to this. Since it can be installed at a position where condensed water is generated in the exhaust gas recirculation system S, it is downstream of the intercooler 6 and upstream of the cylinder air inlet of the internal combustion engine 1 (position surrounded by a one-dot chain line Y in FIG. 1). May be installed.
- Example 1 the example which installed the gas-liquid separation apparatus 20 in what is called a horizontal installation direction in which the flow direction of a gas-liquid two-phase fluid became horizontal with respect to the gravity direction was shown.
- the installation direction of the gas-liquid separation device 20 of the present invention is not limited to this, and the installation direction may be appropriately set due to the influence of the layout or the like in the exhaust gas recirculation system S.
- the start end 34 is erected along the direction of gravity.
- the erection direction of the start end 34 is not limited to this, and depends on the layout of the gas-liquid separator 20. Set as appropriate.
- the internal combustion engine 1 is a diesel engine mounted on a vehicle.
- the present invention is not limited to this, and the internal combustion engine 1 may be a gasoline engine.
- Example 1 and Example 2 the example which applied the gas-liquid separators 20 and 50 to the exhaust gas recirculation system S of the internal combustion engine 1 was shown.
- the present invention is not limited to this.
- the present invention may be applied to a refrigeration cycle apparatus to separate a gas refrigerant and a liquid refrigerant. That is, the gas-liquid separation device of the present invention can be applied to a device that separates gas and liquid from a gas-liquid two-phase fluid.
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Abstract
Description
また、液体の捕集率が不十分な場合には、気体と共に液滴化した液体が流れてしまい、この気液分離装置の下流側に設置された装置(例えばターボ過給機のタービンや内燃機関)に液滴が衝突して、衝撃を与えるおそれがある。
そして、配管は、旋回流発生手段よりも気液二相流体の流れ方向の下流側の内周面に、下流側に向かって配管の内径寸法が大きくなった第1段差面が形成されている。
まず、実施例1における気液分離装置の構成を、「適用例のシステム全体構成」、「気液分離装置の詳細構成」、「旋回流発生リボンの詳細構成」に分けて説明する。
図1は、実施例1の気液分離装置を適用した内燃機関の排気還流システムを示す全体システム図である。以下、図1に基づき、実施例1の適用例のシステム全体構成を説明する。
これにより、低圧EGR通路11では、タービン5bを通過した排気を、コンプレッサ5aの吸気に戻す。また、高圧EGR通路12では、タービン5bに吸い込まれる前の排気を、コンプレッサ5aを通過したエアに戻す。
そこで、実施例1では、図2に示す気液分離装置20を、低圧EGR弁14の下流位置であって、ターボ過給機5のコンプレッサ5aの上流位置(図1において一点鎖線Xで囲む位置)に設置し、液滴となった凝縮水を蒸発させる。
図2は、実施例1の気液分離装置を示す断面図である。以下、図2に基づいて、実施例1の気液分離装置20の詳細構成を説明する。
さらに、このインレットパイプ21の内周面21bには、テーパ面21cと、環状溝部21dとが、気液二相流体の流れ方向に沿って上流側から順に形成されている。
また、この第1段差面41と、第1段差面41よりも上流側の内周面211bとでなす角θ1は、ここでは90°に設定されている。
また、この第2段差面42と、第2段差面42よりも下流側の内周面212bとでなす角θ2は、ここでは90°に設定されている。さらに、第2段差面42の高さ寸法H2は、第1段差面41の高さ寸法H1と同一寸法に設定されている。
なお、開口22bは、インナーパイプ22の軸線方向に開放している。すなわち、インレットパイプ21と、インナーパイプ22と、排気口21aと、開口22bは、同軸となる。
各環状溝部22dは、インナーパイプ22の周方向に沿って延びる環状のへこみであり、インナーパイプ22の内部、すなわち旋回流発生リボン30よりも気液二相流体の流れ方向の下流側の位置に設けられている。また、ここでは、二つの環状溝部22dのうちの一方が、インレットパイプ21に差し込まれた部分に形成され、他方が、インレットパイプ21から突出した部分に形成されている。
各環状溝部22dは、図4に拡大して示すように、第1段差面44と、第2段差面45と、底面46と、を有している。
また、この第1段差面44と、第1段差面44よりも上流側の内周面221cとでなす角θ3は、ここでは90°に設定されている。
また、この第2段差面45と、第2段差面45よりも下流側の内周面222cとでなす角θ4は、ここでは90°に設定されている。さらに、第2段差面45の高さ寸法H4は、第1段差面44の高さ寸法H3と同一寸法に設定されている。
図5は、実施例1の旋回流発生リボンを示す斜視図であり、図6は旋回流発生リボンの側面図である。また、図7は、図5におけるC-C断面図である。以下、図5~図7に基づき、実施例1の旋回流発生リボンの詳細構成を説明する。
第1終端点31aは、旋回流発生リボン30の径方向外側の終端の一方に設定されている。第2終端点31bは、旋回流発生リボン30の径方向外側の終端の他方に設定されている。ここで、第1終端点31aの軸方向位置と、第2終端点31bの軸方向位置とは一致しており、第1終端点31aと第2終端点31bを結んだ終端線Lは、旋回流発生リボン30の軸線Oと直交する。
そして、中心終端点31cは、旋回流発生リボン30の軸線O上であって、第1終端点31a及び第2終端点31bよりも気液二相流体の流入側に設定されている。
折り返し構造33は、図7に示すように、第1端縁32a及び第2端縁32bの先端を旋回流発生リボン30の一方の螺旋面30a側に折り返した第1折返片33aと、第1端縁32a及び第2端縁32bの先端を反対側の螺旋面30b側に折り返した第2折返片33bと、を有している。
この折り返し構造33は、中心終端点31cから第1終端点31aの手前までの間と、中心終端点31cから第2終端点31bの手前までの間に形成されている。これにより、折り返し構造33の径方向両端部と、インレットパイプ21の内周面21bとの間には隙間βが生じている(図2参照)。
第1始端点34aは、旋回流発生リボン30の径方向外側の始端の一方に設定されている。第2始端点34bは、旋回流発生リボン30の径方向外側の始端の他方に設定されている。中心始端点34cは、旋回流発生リボン30の軸線O上であって、第1始端点34a及び第2始端点34bと軸方向位置が一致している。すなわち、中心始端点34cは、第1始端点34aと第2始端点34bを結んだ始端線と軸線Oとの交点上に設定され、第1,第2始端点34a,34b及び中心始端点34cは、旋回流発生リボン30の径方向に沿って並んでいる。さらに、この旋回流発生リボン30の始端部34は、重力方向に沿って立設している。
図8は、実施例1の気液分離装置における気液二相流体及び分離した気体・液体の流れを示す説明図である。
そのため、気体と共に環状溝部21d内に流れ込んだ液滴Wは、負圧領域Hに引っ張られ、第1段差面41に向かって引き寄せられる。これにより、液滴Wが第1段差面41の近傍位置、つまり環状溝部21d内に留まることになる。
実施例1の気液分離装置20では、インレットパイプ21に形成された環状溝部21d、及び、インナーパイプ22に形成された環状溝部22dが、いずれも第1段差面41,44よりも気液二相流体の流れ方向の下流側に位置し、下流側に向かって各パイプ21d,22dの内径寸法を階段状に小さくする第2段差面42,45を有している。
すなわち、実施例1の気液分離装置20は、第2段差面42により、環状溝部21dよりも下流側へ液滴Wが流れてしまうことを防止できる。そのため、この気液分離装置20では、液滴Wを環状溝部21dの内部に留まらせて蒸発させ、液滴Wのままでの液体の流下を抑制できる。
そのため、第2段差面45により、環状溝部22dよりも下流側へ液滴Wが流れてしまうことを防止でき、この液滴Wを環状溝部22dの内部に留まらせて蒸発させ、液滴Wのままでの液体の流下を抑制できる。
実施例1の気液分離装置20では、図8に示すように、第1段差面41と第2段差面42を有する環状溝部21dがインレットパイプ21の内周面21bに形成され、第1段差面44と第2段差面45を有する環状溝部22dがインナーパイプ22の内周面22cに形成されている。
すなわち、インレットパイプ21とインナーパイプ22との双方に、第1段差面41,44が形成されている。
実施例1の気液分離装置20にあっては、下記に列挙する効果が得られる。
前記配管(インレットパイプ21)は、前記旋回流発生手段(旋回流発生リボン30)よりも前記気液二相流体の流れ方向の下流側の内周面21bに、下流側に向かって前記配管(インレットパイプ21)の内径寸法が大きくなった第1段差面41が形成されている構成とした。
これにより、装置の大型化を抑制しつつ、気液二相流体を旋回させて気液分離したときに液滴化した液体が気体と共に流れることを防止できる。
これにより、上記(1)の効果に加え、第1段差面41の近傍位置よりも液滴化した液体が下流側へと移動することを阻止して、液滴のままでの液体の流下を抑制できる。
前記第1段差面41,44は、前記インレットパイプ21の内周面21bと、前記インナーパイプ22の内周面22cとの両方に形成されている構成とした。
これにより、上記(1)又は(2)の効果に加え、インレットパイプ21の内部と、インナーパイプ22の内部との両方で液滴を蒸発させることができ、液滴のままでの液体の流下を防止できる。
実施例2の気液分離装置は、インレットパイプに差し込まれたインナーパイプの外周面に、周方向に延びる突起部が形成されると共に、このインナーパイプの外周面の加熱手段を設けた例である。
図10は、実施例2の気液分離装置を示す断面図である。以下、図10に基づいて、実施例2の気液分離装置の構成を説明する。なお、実施例1と同様の構成については、実施例1と同一の符号を付し、詳細な説明を省略する。
そして、この突起部54の高さ寸法H5は、インレットパイプ21の内周面21bとインナーパイプ51の外周面52bとの隙間寸法H6よりも小さくなるように設定されている。これにより、突起部54の先端面54aとインレットパイプ21の内周面21bとの間には、隙間が生じる。
また、この実施例2では、インナーパイプ51に形成された二つの環状溝部53のうちの一方が、インレットパイプ21に差し込まれた部分の内周面52aに形成され、他方が、インレットパイプ21から突出した部分の内周面52aに形成されている。そのため、加熱用電熱シート55は、環状溝部53(第1段差面53a)が形成された部分の外周面52bを加熱することになる。
図11は、実施例2の気液分離装置における気液二相流体及び分離した気体・液体の流れを示す説明図である。以下、図11に基づいて、実施例2の作用を説明する。
これにより、この気液分離装置50では、環状溝部21dよりも下流側へ流れて、インレットパイプ21とインナーパイプ51の間に流れ込んだ液滴が、インナーパイプ51内に流れ込むことを防止でき、インナーパイプ51を流れる気体に液滴化した液体が混じることを防止できる。
実施例2の気液分離装置50にあっては、下記に列挙する効果が得られる。
これにより、上記(3)の効果に加え、インレットパイプ21内で蒸発しきれなかった液滴がインナーパイプ51を流れる気体に混じることを防止できる。
これにより、上記(1)~(4)のいずれかの効果に加え、液体の蒸発を促進させることができ、液滴の気化率の向上を図ることができる。
これにより、上記(5)の効果に加え、第1段差面53aの近傍位置に留まっている液滴の蒸発を促進できて、液滴の蒸発を効率的に行うことができる。
例えば、図13Aに示す気液分離装置20Aのように、インレットパイプ21の内周面21bには環状溝部を形成せず、インナーパイプ22の内周面22cのみに第1段差面44を有する環状溝部22dを形成してもよい。
また、図13Bに示すように、インレットパイプ21の内周面21bのみに第1段差面41を有する環状溝部21dを形成し、インナーパイプ22の内周面22cには環状溝部を形成しない気液分離装置20Bでもよい。
つまり、インレットパイプ21又はインナーパイプ22の少なくとも一方の内周面21b,22cに第1段差面を形成すれば、気液二相流体から分離した液体を第1段差面の近傍位置に留まらせて蒸発させ、液滴のままでの液体の流下を防止できる。
このときには、インナーパイプ22の開口22bの下流側にて液滴を蒸発させることになるため、蒸発途中で小さくなった液滴が気体の勢いで飛ばされても、インナーパイプ22内に入り込むことを防止できる。
しかしながら、これに限らず、図14に示す気液分離装置20Eのように、旋回流発生リボン30よりも気液二相流体の流れ方向の下流側のインレットパイプ21の内周面21bに、下流側に向かって内径寸法が大きくなった第1段差面41Aのみを形成してもよい。この場合であっても、第1段差面41Aに沿って負圧領域が発生し、この第1段差面41Aの近傍位置に液滴化した液体を留まらせて周方向に旋回させ、蒸発させることができる。
つまり、インレットパイプ21の内周面21b、又はインナーパイプ22の内周面22cの少なくとも一方に、第1段差面のみを形成してもよい。
この場合には、複数の第1段差面のそれぞれの近傍位置に液滴化した液体を留まらせて、蒸発させることができるため、複数回に分けて液滴を蒸発させることが可能となり、液滴の気化率を向上させることができる。
しかし、この角θ1及び角θ3は、第1段差面41,44に沿って負圧領域Hが形成できる角度であればよい。つまり、この角θ1及び角θ3は、具体的には図15に示すように、90°以下の鋭角に設定されればよい(なお、図15では、環状溝部21dのみを示すが、環状溝部22dについても同様である)。
しかし、この角θ2及び角θ4は、第2段差面42,45に沿って環状溝部21d,22d内の液滴の下流側への移動を阻止できる角度であればよい。つまり、この角θ2及び角θ4は、具体的には図15に示すように、90°以下の鋭角に設定されればよい(なお、図15では、環状溝部21dのみを示すが、環状溝部22dについても同様である)。
また、インレットパイプ21の外周面21e及び、インレットパイプ21から突出した部分のインナーパイプ51の外周面52bの双方を加熱用電熱シート55によって加熱してもよい。
なお、実施例1において、始端部34を重力方向に沿って立設した例を示したが、この始端部34の立設方向についてもこれに限らず、気液分離装置20のレイアウトに応じて適宜設定される。
Claims (6)
- 気液二相流体が流れる配管と、前記配管の内部に配置されて前記気液二相流体を前記配管の内周面に沿って旋回させる旋回流発生手段と、を備えた気液分離装置において、
前記配管は、前記旋回流発生手段よりも前記気液二相流体の流れ方向の下流側の内周面に、下流側に向かって前記配管の内径寸法が大きくなった第1段差面が形成されている
ことを特徴とする気液分離装置。 - 請求項1に記載された気液分離装置において、
前記配管は、前記第1段差面よりも前記気液二相流体の流れ方向の下流側の内周面に、下流側に向かって前記配管の内径寸法が小さくなった第2段差面が形成されている
ことを特徴とする気液分離装置。 - 請求項1又は請求項2に記載された気液分離装置において、
前記配管は、前記旋回流発生手段が内部に配置されると共に、前記旋回流発生手段よりも前記気液二相流体の流れ方向の下流側の位置に排気口が形成されたインレットパイプと、前記排気口に一端が差し込まれると共に、前記旋回流発生手段よりも前記気液二相流体の流れ方向の下流側の位置で開放した開口を有するインナーパイプと、を備え、
前記第1段差面は、前記インレットパイプの内周面と、前記インナーパイプの内周面とのうち、少なくとも一方に形成されている
ことを特徴とする気液分離装置。 - 請求項3に記載された気液分離装置において、
前記インナーパイプの外周面と、前記インレットパイプの内周面との間に間隙が設けられると共に、前記インナーパイプは、前記インレットパイプに差し込まれた部分の外周面に、周方向に延びる突起部が形成されている
ことを特徴とする気液分離装置。 - 請求項1から請求項4のいずれか一項に記載された気液分離装置において、
前記配管には、外周面を加熱する加熱手段が設けられている
ことを特徴とする気液分離装置。 - 請求項5に記載された気液分離装置において、
前記加熱手段は、前記配管のうち、前記第1段差面が形成された部分の外周面を加熱する
ことを特徴とする気液分離装置。
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| EP17877860.1A EP3552685B1 (en) | 2016-12-08 | 2017-12-04 | Gas-liquid separation device |
| BR112019010026A BR112019010026A2 (pt) | 2016-12-08 | 2017-12-04 | dispositivo de separação de gás-líquido |
| CN201780072160.9A CN109982767B (zh) | 2016-12-08 | 2017-12-04 | 气液分离装置 |
| US16/463,997 US11179662B2 (en) | 2016-12-08 | 2017-12-04 | Gas-liquid separator |
| RU2019120829A RU2019120829A (ru) | 2016-12-08 | 2017-12-04 | Газожидкостное разделительное устройство |
| MX2019006669A MX2019006669A (es) | 2016-12-08 | 2017-12-04 | Dispositivo de separacion de gas y liquido. |
| KR1020197016214A KR102452177B1 (ko) | 2016-12-08 | 2017-12-04 | 기액분리장치 |
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| CN111495040B (zh) * | 2020-04-30 | 2021-03-16 | 西安交通大学 | 一种水平管道式气液分离装置和方法 |
| KR102843009B1 (ko) * | 2020-06-15 | 2025-08-05 | 현대자동차주식회사 | 차량용 인터쿨러 |
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| JP7690283B2 (ja) * | 2020-12-28 | 2025-06-10 | 臼井国際産業株式会社 | 気液分離装置 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3662984A1 (en) * | 2018-12-07 | 2020-06-10 | Hamilton Sundstrand Corporation | Water extractors and methods of making water extractors |
| US11154804B2 (en) | 2018-12-07 | 2021-10-26 | Hamilton Sundstrand Corporation | Water extractors and methods of making water extractors |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6934297B2 (ja) | 2021-09-15 |
| US11179662B2 (en) | 2021-11-23 |
| CN109982767B (zh) | 2021-07-02 |
| JP2018094459A (ja) | 2018-06-21 |
| EP3552685A4 (en) | 2020-07-01 |
| CN109982767A (zh) | 2019-07-05 |
| BR112019010026A2 (pt) | 2019-09-03 |
| EP3552685A1 (en) | 2019-10-16 |
| RU2019120829A (ru) | 2021-01-11 |
| KR102452177B1 (ko) | 2022-10-06 |
| MX2019006669A (es) | 2019-08-26 |
| KR20190089905A (ko) | 2019-07-31 |
| US20200386195A1 (en) | 2020-12-10 |
| EP3552685B1 (en) | 2022-02-02 |
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