EP0141073A2 - Procédé pour augmenter le degré de séparation dans un cyclone, et cyclone pour la mise en oeuvre dudit procédé - Google Patents

Procédé pour augmenter le degré de séparation dans un cyclone, et cyclone pour la mise en oeuvre dudit procédé Download PDF

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Publication number
EP0141073A2
EP0141073A2 EP84109299A EP84109299A EP0141073A2 EP 0141073 A2 EP0141073 A2 EP 0141073A2 EP 84109299 A EP84109299 A EP 84109299A EP 84109299 A EP84109299 A EP 84109299A EP 0141073 A2 EP0141073 A2 EP 0141073A2
Authority
EP
European Patent Office
Prior art keywords
cyclone
particles
gas
separation
ash
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.)
Granted
Application number
EP84109299A
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German (de)
English (en)
Other versions
EP0141073B1 (fr
EP0141073A3 (en
Inventor
Roine Dipl.-Ing. Brännström
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.)
ABB Stal AB
Original Assignee
Asea Stal AB
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Asea Stal AB filed Critical Asea Stal AB
Priority to AT84109299T priority Critical patent/ATE48246T1/de
Publication of EP0141073A2 publication Critical patent/EP0141073A2/fr
Publication of EP0141073A3 publication Critical patent/EP0141073A3/de
Application granted granted Critical
Publication of EP0141073B1 publication Critical patent/EP0141073B1/fr
Expired legal-status Critical Current

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Classifications

    • 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
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • 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
    • B04C9/00—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks

Definitions

  • the present invention relates to a method for increasing the degree of separation of a cyclone according to the preamble of claim 1 and a cyclone separator for performing the method.
  • the degree of separation of a cyclone depends to a large extent on the rate of entry into the cyclone and on the size of the particles. The greater the entry speed, the greater the degree of separation. Small particles are more difficult to separate than large ones. This is due to the fact that small particles have a low falling speed and are more easily entrained with the air flow into the central part of the cyclone.
  • the invention has for its object to develop a method according to the preamble of claim 1 together with bushing arrangement, which has a significantly greater degree of separation, without the shortening of the service life due to increased entry velocities of the gas at the entry of the cyclone.
  • a cyclone separator for performing the method is characterized according to the invention by the features mentioned in claims 5 and 6.
  • the particles in the transport gas are braked or brought to a standstill at a certain distance before entering the cyclone. Behind this braking point, the particles are accelerated again by the transport gas. The large, heavy particles are accelerated more slowly than the small, light particles.
  • a desired "speed profile" can be achieved for the particles at the entrance to the cyclone. This distance is chosen so that the particles, the size of which is above a certain value and which consequently have a large erosion effect, reach a speed which does not exceed approximately 20 m / s.
  • the smallest particles are quickly accelerated to the speed of the transport gas. Due to the high entry speed, a better degree of separation for small particles and an equally good degree of separation for large particles are obtained compared to known cleaning systems. The total degree of separation is thus increased without increasing the erosion and the associated loss in the service life of the cyclone.
  • the particles can be braked in a T-shaped branch pipe, which is connected to the part of the cyclone corresponding to the vertical bar of the "T".
  • the crossbar of the "T" is connected at one end to the transport line, while the other end is closed with a cover and forms a blind space.
  • a “cushion” consisting of particles collects in this blind space, which forms a braking impact surface and prevents direct contact of the flowing particles with the material of the branch pipe and thus prevents erosion thereof. It is understood that the part of the branch pipe corresponding to the crossbar of the "T" may have ends of different lengths.
  • the invention can be used, for example, in an incineration plant with a pressurized fluidized bed (PFBC plant) and gas turbines that are driven by the combustion gases of the plant.
  • PFBC plant pressurized fluidized bed
  • gas turbines that are driven by the combustion gases of the plant.
  • the pressure vessel can be made smaller. The investment costs are significantly reduced.
  • the pressure drop caused by the deflection in the T-shaped branch pipes is compensated for by a smaller number of cyclones connected in series.
  • 1 denotes a cyclone to which gas containing particles is fed through the transport line 2.
  • the particles for example dust, which are entrained by the combustion gases and which leave a pressurized fluidized bed of an incineration system, for example a power plant, have essentially the same speed in the transport line 2 as the transport gas.
  • gas and particles have the same speed when they enter the cyclone 1.
  • Particularly coarse particles cause strong erosion at a high rate of entry in the 3 denotes section of the wall of the cyclone.
  • the limit for the entry speed is usually between 15 and 20 m / s.
  • a T-shaped branch pipe 4 is connected with its part 5 corresponding to the vertical bar of the "T" s to the entrance of the cyclone 1, while the transport line is connected to part 6 of the branch pipe.
  • Part 7 of the branch pipe is closed with a cover 8 and forms a blind space 9 which fills with particles which form a brake pad on which the particles located in the transport line are braked.
  • the particles in the pipe branch 5 of the branch pipe are accelerated. Small particles are accelerated faster than large ones.
  • a suitable "velocity profile" for the particle mass in the gas stream can be obtained . This makes it possible to use gas speeds of 50 m / s and more, but at the same time limit the speed of the larger particles to less than 15 to 20 m / s, which is desirable in view of erosion.
  • Line 10 shows the speed of the transport gas in transport line 2 and in the branch pipe.
  • the particle speed is represented by curve 11, which shows a “speed profile” of the particles. It can be seen from the curve that the particle speed decreases with increasing particle size.
  • the shape and the position of the curve are of the length x of the pipe branch 5 of the branch pipe dependent. With a longer length x, the curve is shifted to the top right, as shown by arrow 12.
  • the dashed curves 11a and 11b show speed profiles with greater or smaller length x of the part 5 of the branch pipe 5.
  • the dashed line 13 denotes the normal entry speed for gas and particles in a conventional cyclone design. As can be seen from curve 11, the entry speed of the larger particles is below line 13, which is desirable in terms of erosion and service life.
  • the cyclone separator according to the invention is extremely valuable for the separation of bed material or ash from the transport gas of a PFBC plant with a bed and ash discharge device of the type described in EP-A-83306073.4.
  • the cyclone separator is arranged at the outlet end of the discharge device between the latter and a collecting container for separated material.
  • ash extraction devices of the type mentioned, it is expedient to work at high transport speeds, for example 50-60 m / s. Direct introduction of the particle-containing gas into a cyclone at this high speed would result in unsustainable erosion and thus shorten the life of the cyclone.
  • the invention achieves both an acceptable wear of the cyclone and a high degree of separation for fine particles.
EP84109299A 1983-08-16 1984-08-06 Procédé pour augmenter le degré de séparation dans un cyclone, et cyclone pour la mise en oeuvre dudit procédé Expired EP0141073B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84109299T ATE48246T1 (de) 1983-08-16 1984-08-06 Verfahren zur erhoehung des abscheidungsgrades eines zyklons und zyklonenabscheider zur durchfuehrung des verfahrens.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8304429 1983-08-16
SE8304429A SE437943B (sv) 1983-08-16 1983-08-16 Sett att oka en cyklons avskiljningsgrad och cyklonavskiljare for genomforande av settet

Publications (3)

Publication Number Publication Date
EP0141073A2 true EP0141073A2 (fr) 1985-05-15
EP0141073A3 EP0141073A3 (en) 1988-03-30
EP0141073B1 EP0141073B1 (fr) 1989-11-29

Family

ID=20352208

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84109299A Expired EP0141073B1 (fr) 1983-08-16 1984-08-06 Procédé pour augmenter le degré de séparation dans un cyclone, et cyclone pour la mise en oeuvre dudit procédé

Country Status (6)

Country Link
US (1) US4606739A (fr)
EP (1) EP0141073B1 (fr)
JP (1) JPS6061060A (fr)
AT (1) ATE48246T1 (fr)
DE (1) DE3480591D1 (fr)
SE (1) SE437943B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993012889A1 (fr) * 1991-12-23 1993-07-08 Kamyr Ab Dispositif et procede de separation destines a neutraliser la formation de mousse

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5660282A (en) * 1993-04-29 1997-08-26 Evergreen Global Resources, Inc. Method and apparatus for separating resource materials from solid waste
US6936086B2 (en) * 2002-09-11 2005-08-30 Planar Systems, Inc. High conductivity particle filter
WO2009019072A1 (fr) * 2007-08-07 2009-02-12 Polysius Ag Dispositif pour séparer un solide et un gaz et installation de fabrication de ciment
AT505750B1 (de) * 2007-12-21 2009-04-15 Siemens Vai Metals Tech Gmbh Verfahren und vorrichtung zur grobabscheidung von feststoffpartikeln aus feststoffbeladenen gasen
US10231546B2 (en) 2017-03-02 2019-03-19 Knoll, Inc. Chair back tilt mechanism
CA3174436A1 (fr) * 2020-03-06 2021-09-10 Metso Outotec Finland Oy Agencement de separateur a cyclone

Family Cites Families (15)

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Publication number Priority date Publication date Assignee Title
US1469702A (en) * 1923-10-02 Air-cleaning attachment eor automobile carburetors
US2056022A (en) * 1936-01-18 1936-09-29 Gen Electric Flow controlling device for refrigerating systems
US2311868A (en) * 1940-10-01 1943-02-23 Armentrout Arthur L Apparatus for controlling the flow of fluids
US2718754A (en) * 1951-06-30 1955-09-27 Exxon Research Engineering Co Combustion system for combustion gas turbines
US3146998A (en) * 1960-10-22 1964-09-01 Kloeckner Humboldt Deutz Ag Method and apparatus for preheating of fine-grain material
DE2440888C3 (de) * 1974-08-27 1978-11-23 Waeschle Maschinenfabrik Gmbh, 7980 Ravensburg Anlage zum aufeinanderfolgenden Beschicken mehrerer, hintereinander an eine pneumatische Förderleitung über Abscheider angeschlossener Entnahmestationen mit Schüttgut
US3974572A (en) * 1975-01-16 1976-08-17 Aluminium Pechiney Process and heat exchanger for continuous circulation of fluidized powder in heat exchange with a hot gas
SU761539A1 (ru) * 1977-01-24 1980-09-07 Uk Nii Oroshaemogo Zemledeliya Установка для мелиорации оросительной воды 1
US4267048A (en) * 1979-03-12 1981-05-12 Oishikikai Mfg. Co., Ltd. Equipment for separating foreign matter from liquid papermaking materials
US4288235A (en) * 1979-07-06 1981-09-08 Stone & Webster Engineering Corporation Low residence time solid-gas separation device and system
JPS5624530U (fr) * 1979-07-31 1981-03-05
JPS56137751U (fr) * 1980-03-14 1981-10-19
SE8004924L (sv) * 1980-07-03 1982-01-04 Stal Laval Turbin Ab Askkylare for virvelbeddsbrennkammare
JPS5821549U (ja) * 1981-08-04 1983-02-09 岸本産業株式会社 医療用薬液容器の密栓
US4504291A (en) * 1983-06-29 1985-03-12 Mobil Oil Corporation Dropout boot for power recovery train

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ARCHIV F]R W[RMEWIRTSCHAFT UND DAMPFKESSELWESEN, Band 25, Heft 5/6, Mai/Juni 1944, Seiten 95-99, VDI-Verlag, Berlin, DE; M. JARMUSKE: "Entwicklung und Stand der Feifel-Wirbelsieb-Entstaubungsanlagen" *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993012889A1 (fr) * 1991-12-23 1993-07-08 Kamyr Ab Dispositif et procede de separation destines a neutraliser la formation de mousse
US5669948A (en) * 1991-12-23 1997-09-23 Kamyr Ab Separating arrangement and method for counteracting foam formation
US5879422A (en) * 1991-12-23 1999-03-09 Kamyr Ab Separating arrangement and method for counteracting foam formation

Also Published As

Publication number Publication date
SE437943B (sv) 1985-03-25
EP0141073B1 (fr) 1989-11-29
JPS6061060A (ja) 1985-04-08
EP0141073A3 (en) 1988-03-30
DE3480591D1 (de) 1990-01-04
ATE48246T1 (de) 1989-12-15
US4606739A (en) 1986-08-19
JPH0446623B2 (fr) 1992-07-30
SE8304429L (sv) 1985-02-17
SE8304429D0 (sv) 1983-08-16

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