EP2622225B1 - Zentrifugalpumpe - Google Patents

Zentrifugalpumpe Download PDF

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Publication number
EP2622225B1
EP2622225B1 EP11779548.4A EP11779548A EP2622225B1 EP 2622225 B1 EP2622225 B1 EP 2622225B1 EP 11779548 A EP11779548 A EP 11779548A EP 2622225 B1 EP2622225 B1 EP 2622225B1
Authority
EP
European Patent Office
Prior art keywords
pump
ribs
disc
centrifugal pump
separator
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.)
Active
Application number
EP11779548.4A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2622225A1 (de
Inventor
Ludwig Michal
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Andritz AG
Original Assignee
Andritz AG
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Filing date
Publication date
Application filed by Andritz AG filed Critical Andritz AG
Publication of EP2622225A1 publication Critical patent/EP2622225A1/de
Application granted granted Critical
Publication of EP2622225B1 publication Critical patent/EP2622225B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D9/00—Priming; Preventing vapour lock
    • F04D9/001—Preventing vapour lock
    • F04D9/002—Preventing vapour lock by means in the very pump
    • F04D9/003—Preventing vapour lock by means in the very pump separating and removing the vapour

Definitions

  • the invention relates to a centrifugal pump for conveying a gas conceptionigen pulp suspension, with a pump impeller having at least one opening in the base plate, and ribs on the back, wherein a Separatorü is provided, consisting of a Separatorgekoruse with a fixed disc and a co-rotating with the pump shaft Disc, wherein the separator unit is arranged in the pump housing in the axial direction of the pump impeller following the pump impeller on the rear side and wherein the separator housing has a gas collection chamber with gas discharge line, wherein the co-rotating with the pump shaft pulley has a closed surface without openings.
  • Today's pumps for pumping medium-consistency pulp suspensions require the separation of the air from the pulp during operation in order to ensure pumpability. This is achieved by first liquefying the pulp by applying shear forces (either by means of a mixer or fluidizer mounted on the pump shaft or by an external conditioner), thereby separating the air from the pulp. This air is then removed from the pump with or without the aid of a vacuum pump. Depending on the consistency and / or the air content and the flow rate of the pump, fiber losses occur via the degassing line. In order to solve this problem or at least reduce it comparatively complex control systems are used, which should reduce the fiber loss. Such a system is for example from the US 5 087 171 known.
  • EP 1 736 218 A1 a gas separation unit with a rotor.
  • a high fiber loss occurs by transporting the fibers in the degassing.
  • a compromise with reduced pump performance has to be made.
  • These known systems require a high construction cost, also much effort for the setting of the control loops is necessary to be tuned from plant to plant for different types of materials.
  • the existing systems are not reliable enough to completely prevent fiber loss. Faserveriuste can in addition to the loss of pulp also lead to problems with the Pump-Stabitmaschine.
  • the aim of the present invention is to eliminate these problems.
  • the invention is therefore characterized in that the wall is formed as a fixed disc and provided with ribs (vanes), wherein the fixed disc can have a smooth surface on the side facing the pump impeller and the ribs are arranged on the opposite side.
  • the ribs or guide vanes can be arranged radially or else at any angle and designed to be straight or curved. Together with the closed surface of the co-rotating disc, this has the advantage that there is practically no material loss and also the pump stability is given. In this case, the compressed material pressed in the direction of the degassing space is conveyed back into the pump by means of a separator impeller, and the air can escape from the pump counter to the pumping action of the separator.
  • the disk co-rotating with the pump shaft is provided with ribs (blades), whereby the disk co-rotating with the pump shaft can have a smooth surface on the side facing the fixed disk and the ribs on the opposite side are arranged.
  • the ribs or vanes can be arranged radially or at any angle and be executed straight or curved. This achieves a further reduction of the substance loss.
  • An advantageous embodiment of the invention is characterized in that an opening for rinsing water is provided in the separator housing, which communicates with the channel formed by the ribs of the co-rotating disk (separator rotor) and prevents the separator unit from being laid.
  • the pump impeller is preceded by a fluidizer, which may be designed as a rotor connected to the pump shaft or may be provided as a rotor arranged separately from the pump shaft, then the pulp suspension is liquefied in a simple manner and the air is separated from the substance.
  • the pulp enters the pump impeller, where the vast majority of pulp is pumped into the volute casing.
  • the part of the pulp mixture (fiber suspension with air) which is pressed through degassing holes in the pump impeller passes through the degassing holes in the pump impeller and through backflows in the pump impeller back space to the degassing chamber or into the separator chamber.
  • Fig. 1 shows a system for the promotion of gas-containing suspensions with degassing device according to the prior art.
  • the centrifugal pump 1 is mounted here in the lower part of a standpipe 2, which is below a larger container 3, eg bleaching tower or similar. located.
  • the pump 1 has an outlet line 4 for the medium to be pumped, eg pulp suspension and at the inlet a rotor 5, which is completely in the standpipe 2 and 2 should generate turbulence in interaction with the wall of the standpipe, which lead to fluidization of the pulp suspension ,
  • a regulating valve 6 In the outlet line 4 is a regulating valve 6, which is connected to a control unit 7.
  • the pump 1 has a gas discharge line 8, in which a regulating valve 9 and a vacuum pump 10 are arranged.
  • the control unit 7 controls the amount in the outlet line 4 through the control valve 6 and in particular the control valve 9 in the gas discharge line 8. If the height of the suspension in the container 3 and standpipe 2, measured by the pressure sensor 11 at the lower end of the standpipe 2, too high and thus there is the risk that suspension enters the gas discharge line 8, the control unit 7 closes the regulating valve 9.
  • This system essentially makes it possible for gas to be adequately separated during startup and shutdown of the system.
  • Fig. 2 shows a section through a centrifugal pump 1 according to the invention with a pump impeller 12 and integrated thereon fluidizer 13.
  • the pump impeller 12 are located near the axis 14 openings 15 for the removal of gas, which has collected at the fluidizer.
  • fibers and liquid are conveyed back into the pump space through the ribs 16 in the gas / liquid stream passing through the openings 15.
  • To the Pump impeller then connects to a Separatorappel 17.
  • the inner diameter of the stator plate 18 is greater than the inner diameter of the ribs 19 of the fixed disc 18 in this area to ensure an open passage for the air / pulp suspension.
  • This clearance can also be bladed through-up to just outside the outer diameter of the pump shaft projecting blades of the stator plate 18.
  • the stator plate 18 sits a fixedly connected to the pump shaft and rotating at the same speed disc 22 as a rotating Separatorlaufrad 22.
  • This Separatorlaufrad 22 has on the stator plate 18 side facing a smooth surface 23 and has on the stator 18 side facing away from or a plurality of vanes or ribs 24.
  • This rotating disc 22 is smaller in diameter than the inner diameter of the separator housing 25 and forms between its outer periphery and the separator housing 25 has a gap 26 to ensure a flow of air and also of the fibers.
  • This rotating disk 22 has a closed surface without openings. Due to the surface without openings, pressure build-up inside the separator becomes possible. As a result, leakage of pulp in the degassing chamber is largely prevented and the air can escape against the pumping action of the separator from the pump. To prevent clogging of the separator unit 17, rinse water can be introduced through an opening 27.
  • pulp is forced through the openings 15 into the degassing chamber or, in the present case, into the separator unit 17 as a function of flow rate and consistency.
  • This fibrous material is conveyed back into the pump by the separator impeller 22 with the aid of the blades 24.
  • more or less air is forced through the separator unit 17, depending on the amount of air separated.
  • This air is over a bore 28 on the Separatorlaufrad 22 side facing away with or without the aid of a vacuum pump from the pump.
  • the separator unit 17 according to the invention thus takes place a permanent pumping back of fibers without hindering the outflowing air. Characterized in that the Separatorlaufrad 22 has a closed surface without openings, the leakage of fibers is prevented.
  • the separator housing 25 forms with the pump shaft 21 the gas collecting chamber 31 and includes the gas discharge port (28) and the pipe 27 for washing water.
  • the separated gas in particular the separated air, flows from the rear side of the pump impeller 12 through the channels formed by the ribs 19 of the standing disc 18, subsequently passes through the gap 26 into the channels formed by the ribs 24 of the rotating disc 22 the gas collection chamber 31 and is discharged from there via the gas discharge line with or without additional vacuum pump from the centrifugal pump 1.
  • Fig. 3 shows a section through the centrifugal pump according to the invention along the line III-III in Fig. 2 ,
  • the ribs 19 of the fixed disc 18 can be seen, which are shown here bent by way of example.
  • the ribs 19 of the fixed disc 18 as well as the ribs 24 of the rotating disc 22 can be made both straight or curved.
  • the gap 26 between the rotating disc 22 and the housing 25 can be seen.
  • the annular space 29 can be seen, which is located between the fixed disc 18 and the pump shaft 21 and passes through the gas-liquid mixture in the separator 17.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Paper (AREA)
EP11779548.4A 2010-09-27 2011-09-23 Zentrifugalpumpe Active EP2622225B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA1613/2010A AT510538B1 (de) 2010-09-27 2010-09-27 Zentrifugalpumpe
PCT/AT2011/000391 WO2012040752A1 (de) 2010-09-27 2011-09-23 Zentrifugalpumpe

Publications (2)

Publication Number Publication Date
EP2622225A1 EP2622225A1 (de) 2013-08-07
EP2622225B1 true EP2622225B1 (de) 2016-04-06

Family

ID=44913127

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11779548.4A Active EP2622225B1 (de) 2010-09-27 2011-09-23 Zentrifugalpumpe

Country Status (9)

Country Link
US (1) US9784275B2 (pt)
EP (1) EP2622225B1 (pt)
CN (1) CN103124852B (pt)
AT (1) AT510538B1 (pt)
BR (1) BR112013007344B1 (pt)
ES (1) ES2579005T3 (pt)
PT (1) PT2622225T (pt)
RU (1) RU2561344C2 (pt)
WO (1) WO2012040752A1 (pt)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT510538B1 (de) 2010-09-27 2013-02-15 Andritz Ag Maschf Zentrifugalpumpe
JP6088918B2 (ja) * 2013-06-28 2017-03-01 株式会社丸八ポンプ製作所 遠心式ポンプ
CN104373362A (zh) * 2013-08-12 2015-02-25 苏州维艾普新材料股份有限公司 一种物料的平面抽取设备
DK2894342T3 (en) * 2014-01-12 2017-04-03 Alfa Laval Corp Ab SELF-TILTING CENTRIFUGAL PUMP
EP2894343B2 (en) 2014-01-12 2021-09-01 Alfa Laval Corporate AB Self-priming centrifugal pump
CN106715915B (zh) * 2014-08-06 2020-01-17 流量控制有限责任公司 具有防止气锁的轴向弯曲叶片延伸部的叶轮
US20190023411A1 (en) * 2017-07-24 2019-01-24 Hamilton Sundstrand Corporation Hydrocarbon fuel system
KR102495740B1 (ko) * 2018-03-14 2023-02-06 한화파워시스템 주식회사 임펠러
CN109340122A (zh) * 2018-09-28 2019-02-15 佛山市金诺凯机械设备有限公司 一种陶瓷生产用的高压泵
FI129759B (en) * 2018-11-30 2022-08-15 Andritz Oy Arrangement and procedure for removing gas from a pump

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU558691A1 (ru) * 1975-11-27 1977-05-25 Всесоюзный Научно-Исследовательский Биотехнический Институт Сепарационное устройство
FI89516B (fi) 1989-05-10 1993-06-30 Ahlstroem Oy Foerfarande foer blekning av cellulosamassa med otson
US4936744A (en) 1989-07-25 1990-06-26 Goulds Pumps, Incorporated Centrifugal pump
US5087171A (en) 1989-07-25 1992-02-11 Goulds Pumps, Incorporated Paper pulp centrifugal pump with gas separation
US5116198A (en) * 1990-09-07 1992-05-26 Ahlstrom Corporation Centrifugal pumping apparatus
US5114310A (en) * 1990-09-07 1992-05-19 A. Ahlstrom Corporation Centrifugal pump with sealing means
US5151010A (en) * 1990-09-07 1992-09-29 A. Ahlstrom Corporation Combined centrifugal and vacuum pump
FI97024C (fi) * 1991-07-15 1996-10-10 Ahlstroem Oy Menetelmä ja laite kaasun erottamiseksi kaasupitoisesta materiaalista
SE502127C2 (sv) * 1993-12-01 1995-08-28 Kvaerner Pulping Tech Anordning vid en vakuumpump för avluftning av suspensionspump
SE9802178L (sv) * 1998-06-17 1999-04-12 Sunds Defibrator Ind Ab Centrifugalpump för pumpning av en massasuspention
FI111023B (fi) * 1998-12-30 2003-05-15 Sulzer Pumpen Ag Menetelmä ja laite materiaalin pumppaamiseksi sekä laitteen yhteydessä käytettävä roottori
FI20050733A (fi) * 2005-06-22 2006-12-23 Sulzer Pumpen Ag Kaasunerotuslaite, sen etuseinä ja erotuspyörä
FI20050674L (fi) 2005-06-22 2006-12-23 Sulzer Pumpen Ag Keskipakopumppu sen takaseinä ja erotinpyörä
AT510538B1 (de) 2010-09-27 2013-02-15 Andritz Ag Maschf Zentrifugalpumpe

Also Published As

Publication number Publication date
ES2579005T3 (es) 2016-08-03
US20140023485A1 (en) 2014-01-23
RU2561344C2 (ru) 2015-08-27
AT510538B1 (de) 2013-02-15
BR112013007344B1 (pt) 2020-12-08
US9784275B2 (en) 2017-10-10
WO2012040752A1 (de) 2012-04-05
PT2622225T (pt) 2016-07-12
EP2622225A1 (de) 2013-08-07
AT510538A1 (de) 2012-04-15
RU2013116378A (ru) 2014-11-10
CN103124852A (zh) 2013-05-29
BR112013007344A2 (pt) 2016-07-05
CN103124852B (zh) 2016-09-21

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