EP0690456A1 - Méthode et appareil pour le traitement d'aérosols - Google Patents

Méthode et appareil pour le traitement d'aérosols Download PDF

Info

Publication number
EP0690456A1
EP0690456A1 EP95850124A EP95850124A EP0690456A1 EP 0690456 A1 EP0690456 A1 EP 0690456A1 EP 95850124 A EP95850124 A EP 95850124A EP 95850124 A EP95850124 A EP 95850124A EP 0690456 A1 EP0690456 A1 EP 0690456A1
Authority
EP
European Patent Office
Prior art keywords
separator
liquid
aerosols
treatment
suction device
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
EP95850124A
Other languages
German (de)
English (en)
Other versions
EP0690456B1 (fr
Inventor
Heinz Salomon
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.)
Westinghouse Electric Sweden AB
Original Assignee
ASEA Atom AB
ABB Atom 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 Atom AB, ABB Atom AB filed Critical ASEA Atom AB
Publication of EP0690456A1 publication Critical patent/EP0690456A1/fr
Application granted granted Critical
Publication of EP0690456B1 publication Critical patent/EP0690456B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
    • G21F9/04—Treating liquids
    • G21F9/06—Processing
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
    • G21F9/02—Treating gases
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
    • G21F9/28—Treating solids
    • G21F9/34—Disposal of solid waste

Definitions

  • the present invention concerns a method and an apparatus for the treatment of aerosols, especially aerosols generated during treatment of liquid suspensions or liquid solutions in, for example, a nuclear power station.
  • the method according to the invention accordingly concerns the treatment of aerosols occurring during the treatment of materials where liquid is to be found, in a machine included in the treatment process.
  • a reduced pressure is arranged in said machine so that in the case of a possible leakage the surrounding atmosphere can leak into the machine.
  • the method is characterised in that a reduced pressure is arranged through liquid being pumped out of the machine, that a liquid suction device is driven by the pumped out liquid, that aerosols and surrounding atmosphere that may possibly have leaked in are sucked out of the machine by means of said liquid suction device, whereby the aerosols are taken up in said liquid.
  • Said treatment process can especially be included in the treatment of waste in a waste disposal plant at a nuclear power station in which a large amount of waste can be a suspension of water and radioactive filtered substances.
  • radioactive suspensions radioactive aeosols arise in said machine.
  • the apparatus for the treatment of aerosols occurring during the treatment of materials where a liquid is present, is applied to a machine which is included in a treatment process.
  • a reduced pressure is arrangable in the device so that in the case of a leak the surrounding atmosphere is able to leak into the device.
  • the apparatus is characterised in that a liquid pump is arranged for pumping out liquid from the said machine.
  • the liquid pump is coupled as a power source to a liquid suction device, so that the liquid suction device's driving pressure is able to be produced by means of the liquid pumped out of the machine.
  • the machine is also coupled to the liquid suction device's suction inlet so that the reduced pressure in the machine is achieved by means of the liquid suction device.
  • Both surrounding atmosphere which may have leaked into the machine and aerosols produced during the treatment are introducable into the liquid suction device for mixing with liquid, so that said aerosols are able to be taken up in the liquid.
  • said liquid pump is included in the process machine.
  • Said machine can be a separator, for example a decanting centrifuge, for separating radioactive filter substances which are suspended in water.
  • figure 1 an outline diagram of one embodiment of the invention arranged in a process machine in the form of a decanting centrifuge, in figure 2a a preferred embodiment of a suction arrangement according to the invention, and in figure 2b a side view of the suction arrangement according to figure 2a.
  • FIG 1 is shown fundamentally the principles of one embodiment of the invention, arranged in a process machine 2, which in this example is an already known decanting centrifuge.
  • the decanting centrifuge is used in the embodying example to separate by sedimenting solid particles and liquid from a pumpable slurry, which divides up into a dry phase and a liquid phase during the centrifuging.
  • the slurry is led in a known manner from a sludge tank into a decanting centrifuge, via a pipe 4, through slurry inlet 18, and is centrifuged in a conical rotor, after which the solid phase of the slurry is removed through a dry phase outlet 8 and is fed, for example, to a drying arrangement via a dry phase pipe 9.
  • the liquid phase is pumped out through a liquid phase outlet 16 by a liquid phase pump 14 built into the decanting centrifuge 2.
  • a liquid phase pump 14 built into the decanting centrifuge 2.
  • the liquid phase pump is built in the decanting centrifuge, but in other process machines a corresponding pump can be arranged separately.
  • aerosols are produced, which are removed through an aerosol outlet 20.
  • a liquid suction device in this embodiment in the shape of an ejector 22, which can be regarded as being known in principle, is arranged coupled to liquid phase outlet 16 and aerosol outlet 20.
  • ejector 22 is driven by the liquid pumped out of the decanting centrifuge, whereby aerosols together with any air which may have leaked into the decanting centrifuge are sucked into the ejector through its suction inlet.
  • aerosols are combined with the liquid and returned to the process liquid while at the same time the reduced pressure in the decanting centrifuge is maintained.
  • the liquid is then fed further via pipe 26 to some other process machine, to a chemical tank or back to the slurry tank where it is blended to a homogenous liquid.
  • the aerosols can also be led by means of an adjustable valve 23 to, for example, a fan driven ventilation system.
  • the ventilation system is used to maintain a reduced pressure in the decanting centrifuge when it is not in use and also functions as a reserve evacuating arrangement.
  • Liquid which in this embodiment can be deionised water, for cleaning the decanting centrifuge can be led in via pipe 10 and distributed via spray nozzles 12 and can also after being introduced through liquid inlet 18 be flushed through rotor 6.
  • a number of adjustable valves 11 are arranged for controlling the cleaning liquid. After separating has finished the decanting centrifuge 2 is cleaned by means of cleaning liquid until it is free of radioactive aerosols. Valve 23 is then set so that the reduced pressure in the decanting centrifuge is maintained by means of the ventilation system, and subsequently liquid pump 14 and the liquid flow can be switched off.
  • Figure 2a shows a plan view and figure 2b a side view of a preferred embodiment of an, in principle, already known ejector 22, comprising an ejector inlet 28, an ejector outlet 30, a suction inlet 32 as well as a diffuser 34.
  • the process liquid pumped out of a process machine is led into ejector inlet 28 and is dispersed by diffuser 34 in ejector 22 so that a suction effect is produced at the suction inlet. Aerosols which enter through suction inlet 32 are mixed with process liquid in the ejector and are carried further through the ejector outlet.
  • the liquid flow required through the ejector is dependent on the process machines function and size. In this example the liquid flow sometimes reaches 1.5 kg/s.
  • the ejector's suction power can be adjusted by changing the diffusers nozzle diameter and nozzle angle.
  • the ejector 22 is very simply designed and gives a weak but controllable reduced pressure in the process machine.
  • the ejector's suction power can be controlled and thereby the reduced pressure in the process machine can be regulated.
  • the power of the ejector can also be varied by the use of different diffuser nozzles.
  • the ejector is preferably mounted vertically, with the ejector inlet 28 and the suction inlet 32 in its upper end.
  • the method and apparatus according to the invention is used in the preferred embodiment for treating radioactive aerosols during the cleaning of waste water in a nuclear power station.
  • the invention can also be used in any other process where aerosols are present, or condensable or absorbable vapours or gases which one wishes to return to a process liquid. It can, for example, be a matter of mixers, mills or screwfeeds. It is also possible to use a separate circulation flow of liquid as the drive source for the liquid suction device and collecting liquid for the aerosol or the gas. In the case of gases or vapours, these are dissolved or condensed in the fluid which flows through the ejector.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • General Preparation And Processing Of Foods (AREA)
  • Centrifugal Separators (AREA)
EP19950850124 1994-07-01 1995-06-30 Méthode et appareil pour le traitement d'aérosols Expired - Lifetime EP0690456B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9402336A SE9402336L (sv) 1994-07-01 1994-07-01 Förfarande och anordning för omhändertagande av aerosoler
SE9402336 1994-07-01

Publications (2)

Publication Number Publication Date
EP0690456A1 true EP0690456A1 (fr) 1996-01-03
EP0690456B1 EP0690456B1 (fr) 1998-08-19

Family

ID=20394601

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19950850124 Expired - Lifetime EP0690456B1 (fr) 1994-07-01 1995-06-30 Méthode et appareil pour le traitement d'aérosols

Country Status (4)

Country Link
EP (1) EP0690456B1 (fr)
DE (1) DE69504147T2 (fr)
ES (1) ES2120707T3 (fr)
SE (1) SE9402336L (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1276082A (en) * 1965-01-08 1972-06-01 Licentia Gmbh An apparatus for the decontamination of gas
FR2576525A1 (fr) * 1985-01-25 1986-08-01 Commissariat Energie Atomique Extracteur centrifuge pour l'extraction liquide-liquide en presence de particules solides, et installation faisant intervenir plusieurs de ces extracteurs
WO1994009904A1 (fr) * 1992-11-04 1994-05-11 Abb Atom Ab Procede et dispositif de traitement et d'elimination de resine echangeuse d'ions usee
EP0628970A1 (fr) * 1993-06-07 1994-12-14 Robatel Décanteuse centrifuge pour le traitement des produits nucléaires

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1276082A (en) * 1965-01-08 1972-06-01 Licentia Gmbh An apparatus for the decontamination of gas
FR2576525A1 (fr) * 1985-01-25 1986-08-01 Commissariat Energie Atomique Extracteur centrifuge pour l'extraction liquide-liquide en presence de particules solides, et installation faisant intervenir plusieurs de ces extracteurs
WO1994009904A1 (fr) * 1992-11-04 1994-05-11 Abb Atom Ab Procede et dispositif de traitement et d'elimination de resine echangeuse d'ions usee
EP0628970A1 (fr) * 1993-06-07 1994-12-14 Robatel Décanteuse centrifuge pour le traitement des produits nucléaires

Also Published As

Publication number Publication date
ES2120707T3 (es) 1998-11-01
DE69504147D1 (de) 1998-09-24
SE9402336L (sv) 1996-01-02
EP0690456B1 (fr) 1998-08-19
SE9402336D0 (sv) 1994-07-01
DE69504147T2 (de) 1999-04-15

Similar Documents

Publication Publication Date Title
US4663035A (en) Apparatus for separating air and solid particles from a liquid
US4919826A (en) Process and apparatus for separating solids and liquids from an effluent stream
RU2520815C2 (ru) Система и способ удаления материала, система для образования пены и устройство для преобразования пены в жидкость
JPH0638120B2 (ja) 放射性物質で汚染された部分を除染するための方法及び装置
CN109013666B (zh) 真空餐厨垃圾处理系统及处理方法
US5534162A (en) Method for disposal of biological waste
JP2006305648A (ja) 工作機のクーラント循環装置
JPH04263689A (ja) ガス排出装置
EP0690456B1 (fr) Méthode et appareil pour le traitement d'aérosols
US6969414B2 (en) Waste stream separator
EP0620192A1 (fr) Séparateur solide-liquide des boues
CN211562514U (zh) 一种处理有机废气的uv光氧催化设备
US5032260A (en) Eductor system for water ring vacuum pump
KR102116560B1 (ko) 하이테크 리모델링 현장의 친환경 고효율 슬래브 절단 시스템 및 이를 이용한 슬래브 절단방법
CN219530537U (zh) 气柜污水收集排放装置
CN208711948U (zh) 一种抽吸卸料离心机
JP5269514B2 (ja) 眼鏡レンズ周縁加工の脱臭システム
KR100571564B1 (ko) 고압을 이용한 표면 방사능 물질의 제염 및 집진장치
CN208437036U (zh) 一种带有溶剂泵出装置的立式离心机
CN116406317A (zh) 具有可移除的离心机容器的分离器
US5149424A (en) Centrifuge apparatus for residual liquid waste removal from recyclable container material
CN108816528A (zh) 一种抽吸卸料离心机
CN110666680A (zh) 真空吸附装置
CN218436035U (zh) 一种羽绒除尘装置
CN218653475U (zh) 一种污水泵站废气治理设备

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): BE CH DE ES FR LI NL SE

K1C1 Correction of patent application (title page) published

Effective date: 19960103

17P Request for examination filed

Effective date: 19960625

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

17Q First examination report despatched

Effective date: 19970819

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE CH DE ES FR LI NL SE

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 69504147

Country of ref document: DE

Date of ref document: 19980924

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: BOVARD AG PATENTANWAELTE

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2120707

Country of ref document: ES

Kind code of ref document: T3

ET Fr: translation filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19990610

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 19990621

Year of fee payment: 5

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19990628

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19990706

Year of fee payment: 5

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19990819

Year of fee payment: 5

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 20000701

BERE Be: lapsed

Owner name: ABB ATOM A.B.

Effective date: 20000630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010101

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010228

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20010101

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010403

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20020304

REG Reference to a national code

Ref country code: CH

Ref legal event code: PFA

Owner name: ABB ATOM AB

Free format text: ABB ATOM AB# #721 63 VAESTERAS (SE) -TRANSFER TO- ABB ATOM AB# #721 63 VAESTERAS (SE)

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20140617

Year of fee payment: 20

Ref country code: SE

Payment date: 20140624

Year of fee payment: 20

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: SE

Ref legal event code: EUG