WO2008116239A1 - Verfahren und vorrichtung zum pumpen von gashaltigen suspensionen - Google Patents
Verfahren und vorrichtung zum pumpen von gashaltigen suspensionen Download PDFInfo
- Publication number
- WO2008116239A1 WO2008116239A1 PCT/AT2008/000093 AT2008000093W WO2008116239A1 WO 2008116239 A1 WO2008116239 A1 WO 2008116239A1 AT 2008000093 W AT2008000093 W AT 2008000093W WO 2008116239 A1 WO2008116239 A1 WO 2008116239A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- wings
- rotor
- pump
- pump impeller
- suction nozzle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
- F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/0042—Degasification of liquids modifying the liquid flow
- B01D19/0052—Degasification of liquids modifying the liquid flow in rotating vessels, vessels containing movable parts or in which centrifugal movement is caused
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2261—Rotors specially for centrifugal pumps with special measures
- F04D29/2277—Rotors specially for centrifugal pumps with special measures for increasing NPSH or dealing with liquids near boiling-point
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2261—Rotors specially for centrifugal pumps with special measures
- F04D29/2288—Rotors specially for centrifugal pumps with special measures for comminuting, mixing or separating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D31/00—Pumping liquids and elastic fluids at the same time
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
- F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
- F04D7/045—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous with means for comminuting, mixing stirring or otherwise treating
Definitions
- the invention relates to a method for pumping gas-containing suspensions, in particular pulp suspensions, and to an apparatus for carrying out the method with a fluidizing rotor having one or more vanes and a pump impeller.
- US Pat. No. 4,971,519 discloses a pump with a fluidizing rotor in the upper position, in which case the suspension is fluidized in such a way that it is substantially prevented that gas comes to the suction opening of the pump.
- EP 0474 476 or EP 0474 478 are known in which behind the pump impeller, an impeller of a vacuum pump is arranged to suck the gas.
- a zone is generated by the rotation in the center of the rotor, in which the gas is deposited.
- the gas to be separated is generally air, but may be another gas in specific applications. All versions have the disadvantage that for discharging the gas, an additional device either directly in the pump or separately, is needed. For other applications, e.g. Pumping and separating two-phase liquids, especially oil suspensions, are already available according to the
- EP 330 387 A2 describes a process for the degassing of suspensions, in which the impeller generates a separation of suspension and gas, wherein the gas in the
- the invention is therefore characterized in that zones of low pressure and zones of higher pressure are generated on a fluidizing rotor with one or more wings on the wings, which lower the gas at the zones
- Pressure is separated from the suspension and conveyed by means of the fluidizing rotor, in particular in the suction nozzle of the pump, generated pressure to the pump impeller, wherein the fluidizing rotor, in particular in the suction nozzle of the pump, generates a pressure which discharges the gas without suction from the pump ,
- a special design of the pump with integrated vacuum pump or a separate vacuum pump can be dispensed with.
- An advantageous development of the invention is characterized in that the gas is passed through openings in the pump impeller in a separation chamber.
- the flow rate of the suspension in the suction nozzle of the pump is between 0.5 m / s and 4.0 m / s, preferably between 1.0 m / s and 3.0 m / s, for example less than 3 m / s is.
- the gas can be effectively separated without being entrained by the suspension in the pump impeller.
- the invention also relates to a device for pumping gaseous suspensions, in particular pulp suspensions, with a fluidizing rotor having one or more vanes and a pump impeller, the fluidizing rotor protruding into the suction nozzle of the pump and having a hub. It is characterized in that the ratio of suction nozzle diameter to free length of the fluidizing rotor satisfies the following equation: Ds / FL> 0.0024 * Dp + 0.7 where D 3 the suction nozzle diameter FL the free length of the fluidizing rotor (total length - length of the hub)
- D p denotes the pressure nozzle diameter
- the device is also characterized in that the aspect ratio ⁇ satisfies the following equation: ⁇ ⁇ -0.0055 * Dp + 2.15 for D p ⁇ 250 mm and ⁇ ⁇ 0.775 for Dp> 250 mm where the aspect ratio ⁇ is defined as the free length FL of the fluidizing rotor (total length - length of the hub) / blade width b / Number of wings n and D p denotes the pressure nozzle diameter.
- the rotor length L sp in the suction nozzle is greater than 0.5 suction nozzle diameter D s , preferably greater than 0.6 suction nozzle diameter D s .
- a particularly good variant of the invention is characterized in that the ratio of the length of the hub of the fluidizing rotor to the length of the suction nozzle is between 0.9 and 1.1, preferably about 1.0, and the wings of the fluidizing rotor extend as far as the pump impeller.
- zones of lower or higher pressure can form on the upper or lower side of the vanes (viewed in the direction of rotation of the impeller), at which the gas can be deposited, and the separated gas is prevented from collecting in the center, so that the generated pressure can carry the gas out of the system without additional aids.
- the fluidizing rotor In the region of the suction nozzle, the fluidizing rotor generates a high pressure on the part facing the pump impeller, through which the gas can be removed without further units.
- a favorable embodiment of the invention is characterized in that the wings are band-shaped and the curvature of the surface of the wing decreases from the free end in the direction of the pump impeller, wherein this can be done continuously, for example linear.
- the entry losses can be greatly reduced. It has proven advantageous if the surface of the wing merges at the outlet end at a shallow angle to the axis in the wings of the pump impeller. This achieves a smooth transition from the fluidizing rotor to the pump rotor and reduces the deflection losses. If the pump impeller has further vanes for conveying the degassed pulp suspension, which are arranged between the vanes connected to the fluidizing rotor, a better delivery of the suspension can be achieved. With openings provided in the pump impeller on the negative pressure side of the vanes, which openings may communicate with a separation space, the vapor deposition can be made even more effective. Advantageously, it has been found that the fluidizing rotor has four blades. Thus, a good power distribution can be achieved. When the fluidizing rotor is free at the entrance end in the center, the
- FIG. 1 is a 3D view of a fluidization rotor and impeller according to the invention
- Fig. 2 a longitudinal section through a device according to the invention
- Fig. 3 is a plan view of the Fluidmaschinesrotor.
- Fig. 1 shows the pump 1 according to the invention, which consists of a housing 2, a pump impeller 3 with wings 4 and a fluidizing rotor 5 with wings 6.
- the wings 6 are band-shaped and the curvature of the surface of the wings 6 decreases from the free end 7 in the direction of the pump impeller 3 from.
- the surface of the wings 6 is aligned almost perpendicular to the axis. This minimizes entry loss and allows greater force to be transferred to the suspension.
- the surfaces of the wings 6 at the outlet end 8 are arranged at a shallow angle to the axis and go into the wings 4 of the pump impeller 3 over.
- 4 more wings 9 are provided between the wings, which increase the flow rate of the pump 1.
- the base plate 10 of the pump impeller 3 has a number of
- Openings 11 which are arranged on the negative pressure side of the wings 4 and 9 and serve for the removal of the collected gas.
- negative pressure zones are formed in the direction of rotation on the impeller, at the top of the vanes 6. Due to the shape of these wings according to the invention, the gas which has precipitated there is pressed in the direction of the pump impeller 3 and separated there from the delivery flow through the openings 11. Furthermore, a sufficient pressure is generated by the wings 6, to dissipate the separated gas and thus it can be saved a subsequent vacuum pump.
- the deposition of the gas, especially the air, on the wings 6 can be strongly supported. This also makes it easier to convey the suspension in the center. Also, the wings 6 can thereby exert a greater delivery pressure on the suspension and also the separated gas.
- the choice of the diameter D s of the suction nozzle should be such that at a given throughput, a flow rate in the suction nozzle between 0.5 m / s and 4 m / s, preferably between 1, 0 m / s and 3.0 m / s results , This flow rate, especially below 3 m / s leads to an optimal
- Fig. 2 shows a longitudinal section through the device according to the invention, wherein like parts are designated by the same reference numerals.
- a separation chamber 12 At the back of the pump impeller 3 is a separation chamber 12 in which the deposited on the wings 6 from the suspension and by the Fluidizing rotor 5 is deposited through the openings 11 pressed gas, passed into a Gasabscheidehunt 20 and then discharged via a line 16.
- the impeller 3 and 15 wings can still be arranged, the one
- FIG. 3 shows a plan view of the fluidizing rotor 5 in the direction of the pump impeller 3. It can be seen that the wings 6 strongly overlap and that in the center remains a free space 19 which is filled with suspension.
- this inner space 19 is kept as low as possible. Due to the relatively large width b of the wing 6 in relation to the diameter dN of the hub 17, which corresponds approximately to the free space in the center, the deposition of the gas, especially the air, on the wings 6 can be strongly supported. This also makes it easier to convey the suspension in the center. Also, the wings 6 can thereby exert a greater delivery pressure on the suspension and also the separated gas.
- the free (not connected) entrance ends 7 are clearly visible here. Furthermore, the ratio of the diameter d / D of the fluidization rotor 5 and the impeller 3 can be seen. Also, the hub 17 and the suction port 18 can be seen here.
- the invention is not limited by the examples. It can also be selected, for example, other dimensions that are highly dependent on the size and the Delivery of the pump are. Essential, however, are the basic design of the fluidizing rotor and the arrangement in the pump housing / suction nozzle, whereby the fluidizing rotor presses the separated gas out of the pump and no additional facilities for vacuum generation are more necessary.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Paper (AREA)
Abstract
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI20096070A FI127586B (fi) | 2007-03-27 | 2008-03-18 | Laite kaasupitoisten suspensioiden pumppaamiseksi |
| CN2008800100680A CN101652163B (zh) | 2007-03-27 | 2008-03-18 | 用于泵送含有气体的悬浮液的装置 |
| DE112008000788.8T DE112008000788B4 (de) | 2007-03-27 | 2008-03-18 | Vorrichtung zum Pumpen von gashaltigen Suspensionen und Verwendung der Vorrichtung zum Pumpen einer gashaltigen Faserstoffsuspension |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ATA474/2007 | 2007-03-27 | ||
| AT0047407A AT505062B1 (de) | 2007-03-27 | 2007-03-27 | Verfahren und vorrichtung zum pumpen von gashaltigen suspensionen, insbesondere faserstoffsuspensionen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2008116239A1 true WO2008116239A1 (de) | 2008-10-02 |
Family
ID=39434311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/AT2008/000093 Ceased WO2008116239A1 (de) | 2007-03-27 | 2008-03-18 | Verfahren und vorrichtung zum pumpen von gashaltigen suspensionen |
Country Status (5)
| Country | Link |
|---|---|
| CN (1) | CN101652163B (de) |
| AT (1) | AT505062B1 (de) |
| DE (1) | DE112008000788B4 (de) |
| FI (1) | FI127586B (de) |
| WO (1) | WO2008116239A1 (de) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015067748A1 (de) * | 2013-11-10 | 2015-05-14 | Uts Biogastechnik Gmbh | Pumpenvorrichtung und verfahren zum betreiben |
| CN106194760A (zh) * | 2016-07-14 | 2016-12-07 | 西华大学 | 一种气液分离输送泵 |
| EP3177834A4 (de) * | 2014-08-06 | 2018-04-11 | Flow Control LLC. | Laufrad mit axial gebogenen schaufelverlängerungen zur verhinderung von lufteinschlüssen |
| EP3315182A1 (de) * | 2016-10-31 | 2018-05-02 | Pratt & Whitney Canada Corp. | Zentrifugalabscheider |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4015825A1 (de) * | 2020-12-21 | 2022-06-22 | Sulzer Management AG | Kreiselpumpe zum pumpen einer mehrphasensuspension und gasentfernungsvorrichtung zur verwendung in einer kreiselpumpe |
| CN114307259B (zh) * | 2021-12-30 | 2023-05-30 | 中国航空工业集团公司金城南京机电液压工程研究中心 | 一种液力式组合传动发电机的泵式油气分离器 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1987000448A1 (en) * | 1985-07-18 | 1987-01-29 | A. Ahlstrom Corporation | Apparatus for mixing chemicals in fibre suspensions |
| EP0337394A2 (de) * | 1988-04-11 | 1989-10-18 | A. Ahlstrom Corporation | Wirkungsweise und Gerät zur Gasabtrennung von einem gepumpten Medium mittels einer Pumpe |
| EP0395236A1 (de) * | 1989-04-27 | 1990-10-31 | A. Ahlstrom Corporation | Pumpe um Gas von einer zu pumpenden Flüssigkeit abzutrennen |
| US5039320A (en) * | 1989-03-29 | 1991-08-13 | Kamyr Ab | Apparatus for fluidizing, degassing and pumping a suspension of fibrous cellulose material |
| WO1999066209A1 (en) * | 1998-06-17 | 1999-12-23 | Valmet Fibertech Ab | Pulp pump |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD101947A1 (de) * | 1972-12-28 | 1973-11-20 | ||
| DE3033450C2 (de) | 1980-09-05 | 1984-04-05 | Grundfos A/S, 8850 Bjerringbro | Vorrichtung zur Abscheidung von Gas aus einer Flüssigkeit |
| US4826398A (en) * | 1987-07-06 | 1989-05-02 | Kamyr Ab | Medium consistency pump with self-feeding |
| EP0330398A3 (de) * | 1988-02-24 | 1991-07-24 | Seagate Technology International | Magnetischer Lesekopf |
| SE504976C2 (sv) * | 1995-09-07 | 1997-06-02 | Kvaerner Pulping Tech | Fibermassasuspensionspump med inbyggd vakuumpump |
| FI111023B (fi) * | 1998-12-30 | 2003-05-15 | Sulzer Pumpen Ag | Menetelmä ja laite materiaalin pumppaamiseksi sekä laitteen yhteydessä käytettävä roottori |
-
2007
- 2007-03-27 AT AT0047407A patent/AT505062B1/de active
-
2008
- 2008-03-18 CN CN2008800100680A patent/CN101652163B/zh not_active Ceased
- 2008-03-18 WO PCT/AT2008/000093 patent/WO2008116239A1/de not_active Ceased
- 2008-03-18 DE DE112008000788.8T patent/DE112008000788B4/de active Active
- 2008-03-18 FI FI20096070A patent/FI127586B/fi active IP Right Grant
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1987000448A1 (en) * | 1985-07-18 | 1987-01-29 | A. Ahlstrom Corporation | Apparatus for mixing chemicals in fibre suspensions |
| EP0337394A2 (de) * | 1988-04-11 | 1989-10-18 | A. Ahlstrom Corporation | Wirkungsweise und Gerät zur Gasabtrennung von einem gepumpten Medium mittels einer Pumpe |
| US5039320A (en) * | 1989-03-29 | 1991-08-13 | Kamyr Ab | Apparatus for fluidizing, degassing and pumping a suspension of fibrous cellulose material |
| EP0395236A1 (de) * | 1989-04-27 | 1990-10-31 | A. Ahlstrom Corporation | Pumpe um Gas von einer zu pumpenden Flüssigkeit abzutrennen |
| WO1999066209A1 (en) * | 1998-06-17 | 1999-12-23 | Valmet Fibertech Ab | Pulp pump |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015067748A1 (de) * | 2013-11-10 | 2015-05-14 | Uts Biogastechnik Gmbh | Pumpenvorrichtung und verfahren zum betreiben |
| EP3177834A4 (de) * | 2014-08-06 | 2018-04-11 | Flow Control LLC. | Laufrad mit axial gebogenen schaufelverlängerungen zur verhinderung von lufteinschlüssen |
| AU2019203725B2 (en) * | 2014-08-06 | 2020-09-10 | Flow Control Llc. | Impeller with axially curving vane extensions to prevent airlock |
| CN106194760A (zh) * | 2016-07-14 | 2016-12-07 | 西华大学 | 一种气液分离输送泵 |
| EP3315182A1 (de) * | 2016-10-31 | 2018-05-02 | Pratt & Whitney Canada Corp. | Zentrifugalabscheider |
| US10729992B2 (en) | 2016-10-31 | 2020-08-04 | Pratt & Whitney Canada Corp. | Centrifugal separator |
Also Published As
| Publication number | Publication date |
|---|---|
| FI127586B (fi) | 2018-09-28 |
| AT505062A1 (de) | 2008-10-15 |
| AT505062B1 (de) | 2009-08-15 |
| CN101652163A (zh) | 2010-02-17 |
| DE112008000788A5 (de) | 2010-04-08 |
| FI20096070L (fi) | 2009-10-19 |
| CN101652163B (zh) | 2012-09-26 |
| DE112008000788B4 (de) | 2021-08-19 |
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