US3551674A - Liquid-rinsed precipitation electrode for a device for precipitating and collecting charged particles from a gas - Google Patents

Liquid-rinsed precipitation electrode for a device for precipitating and collecting charged particles from a gas Download PDF

Info

Publication number
US3551674A
US3551674A US615973A US3551674DA US3551674A US 3551674 A US3551674 A US 3551674A US 615973 A US615973 A US 615973A US 3551674D A US3551674D A US 3551674DA US 3551674 A US3551674 A US 3551674A
Authority
US
United States
Prior art keywords
liquid
gas
wires
electrode
precipitation electrode
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.)
Expired - Lifetime
Application number
US615973A
Other languages
English (en)
Inventor
Ove Magnus Strindehag
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.)
Studsvik Energiteknik AB
Original Assignee
Studsvik Energiteknik 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 Studsvik Energiteknik AB filed Critical Studsvik Energiteknik AB
Application granted granted Critical
Publication of US3551674A publication Critical patent/US3551674A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C17/00—Monitoring; Testing ; Maintaining
    • G21C17/02—Devices or arrangements for monitoring coolant or moderator
    • G21C17/04—Detecting burst slugs
    • G21C17/044—Detectors and metering devices for the detection of fission products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/34—Constructional details or accessories or operation thereof
    • B03C3/40—Electrode constructions
    • B03C3/45—Collecting-electrodes
    • B03C3/53—Liquid, or liquid-film, electrodes
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S55/00—Gas separation
    • Y10S55/38—Tubular collector electrode

Definitions

  • the invention is concerned with a device for g g precipitation and collection of charged particles from a gas on [52] U.S. a recipitation electrode.
  • the electrode consists of two lel vertical wires. Water flows along the electrode and [32] Priority [54] LlQUlD-RlNSED PRECIPITATION ELECTRODE FOR A DEVICE FOR PRECIPITATING AND 250/83, paral- 250/435, 250/715, 250/102, 55/120, 55/151 forms a Int. G01t 1/20 thin film between the wires.
  • the water thus has the dual func- Field ofSearch............................................ 250/7l.5, tion of increasing the surface of the electrode and rinsing the 83,43.5FT, R; /l51, 102, wires.
  • the present invention relates to a device for precipitation and collection of charged particles from a gas.
  • the present. invention is especially concerned with precipitation, collection and indication of radioactive parti- :les, for example such particles which escape through leakage :aused by damage to a fuel element in a nuclear reactor.
  • an electrode of .his type in the form of a wire along which the liquid flows, or in the form of a porous plate through which the liquid can pass.
  • these known types of electrode are accomaanied by the disadvantage that it is difficult to effect a continuous, even liquid flow, and that the liquid volume must be kept fairly large, causing a low concentration of precipitated particles in the liquid.
  • the principle object of the present invention is to arrange a device in which the liquid flow is kept absolutely even and at a minimum.
  • the device thus comprises a chamber with a delivery inlet and an outlet for the gas which carries the charged particles, a precipitation electrode situated in the chamber, a delivery inlet for the supply of a liquid to the precipitation electrode and an outlet for the liquid containing precipitated particles flowing from the precipitation electrode, being characterized in that, the precipitation electrode is comprised of at least two, parallel, ertical or inclined wires the upper ends of which are situated idjacent to the delivery inlet for the liquid which will flow ilong the precipitation electrode in the form of a liquid film aetween the wires.
  • the liquid forms a well-defined film that effectively washes the wires, the liquid moving at an even speed along the wires, utilizing a minimum of liquid to transport the precipitated particles to a measuring chamber.
  • a preferred feature of the invention is to embody the precipitation electrode with two parallel metal wires, and when the liquid is water, the wires can preferably have a diameter of 0.2-0.5 mm. being arranged at a mutual distance of approximately 2 mm. from each other.
  • the utilization of a plurality of parallel wires is also possible, but no advantage would be gained thereby in respect of the precipitation, but would result in an undesirable increase of liquid flow in relation to the arrangement with two wires;
  • HO. 1 shows an arrangement according to the invention, l-lGv 2 showing in larger scale a section along the line ll-ll in FIG. 1.
  • the device according to the drawing comprises a vertical metal pipe 1, which is provided with an inlet 2 and an outlet 3 for a gas.
  • the pipe 1 is provided with an end wall 4 of electrically insulating material.
  • a tube 5 which is provided with a liquid delivery inlet 7.
  • a metal rod 6 Centrally through the tube 5 extends a metal rod 6, two metal wires being secured to the lower end of the rod which is at the same level as the lower end of the tube 5.
  • the wires 8 extend parallel to each other and coaxially to the pipe I. the lower ends of the wires being secured to a short metal rod 9 which is secured to the upper end of a coilspring 10.
  • the lower end of the coilspring 10 being secured by means of a retainer 11 to a conduit 12 which extends through an electrically insulating end wall 13 in the bottom of the pipe 1.
  • the lower end of the conduit 12 is connected to a measuring chamber 14, to which an outlet tube 15 is also connected.
  • One wall of the measuring chamber is devised as a window 16, a photomultiplicator 17 being connected to the aforesaid transparent wall.
  • a flow of portative gas containing the radio active isotopes, if any, is introduced through the inlet 2.
  • the metal rod 6 and the metal pipe 1 are then connected to an electric power source so that the metal wires 8 acquire a negative potential.
  • Water is then introduced through the delivery inlet 7 at such a speed that a water film 18, see FIG. 2, is formed between the wires 8 and continuously runs downwards.
  • Such radio active particles which on their decay emit an electron acquire a positive charge and as a result are attracted by the negatively charged precipitation electrode.
  • a Cerenkov-radiation is generated dependent upon the emission of a high energy beta or gamma radiation from the radioactive particles. Thereafter the Cerenkov-radiation is registered according to a previously known method by the photomultiplicator 17.
  • the arrangement according to the invention can be combined with, for example, a scintillometer for measurement of the radioactivity in the collected liquid, or generally with every known type of measuring device suitable for the measurement of small quantities of precipitated particles in a liquid.
  • a device for precipitation and collection of charged particles from a gas comprising a chamber with a delivery port and a discharge port for-the gas, a precipitation electrode situ' ated within the chamber, a delivery port for delivering a rinsing liquid to the precipitation electrode, and a discharge port for rinsing liquid containing precipitated particles flowing from the precipitation electrode, said precipitating electrode comprising at least two parallel nonhorizontally disposed wires the upper ends of whichare so situated adjacent to the liquid-delivery port that the rinsing liquid flows along the wires in the form of a film between the wires.
  • a device characterized in that the precipitation electrode comprises two metal wires of diameter 0.2-0.5 mm., the wires being situated at a mutual distance of approximately 2 mm.
  • a device characterized in that the precipitation electrode extends between two electrically insulating end walls in a metal pipe.
  • a device for measuring radioactive isotopes, wherein the discharge port for the liquid flowing from the precipitation electrode is connected to a measuring chamber provided with a window, a photomultiplicator being connected to said window for measuring Cerenkov-radiation generated on decay of the radioactive isotopes.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Measurement Of Radiation (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
US615973A 1966-02-18 1967-02-14 Liquid-rinsed precipitation electrode for a device for precipitating and collecting charged particles from a gas Expired - Lifetime US3551674A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE2147/66A SE308931B (de) 1966-02-18 1966-02-18

Publications (1)

Publication Number Publication Date
US3551674A true US3551674A (en) 1970-12-29

Family

ID=20259442

Family Applications (1)

Application Number Title Priority Date Filing Date
US615973A Expired - Lifetime US3551674A (en) 1966-02-18 1967-02-14 Liquid-rinsed precipitation electrode for a device for precipitating and collecting charged particles from a gas

Country Status (3)

Country Link
US (1) US3551674A (de)
GB (1) GB1176425A (de)
SE (1) SE308931B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3748828A (en) * 1970-11-06 1973-07-31 Akzo Belge Sa Process and apparatus for fluid-liquid contacting
US3979593A (en) * 1973-03-22 1976-09-07 Australian Atomic Energy Commission Detector for measuring a radioisotope tracer gas
US20050115406A1 (en) * 2002-07-12 2005-06-02 Hengst Gmbh & Co. Kg Electric separator with a rinsing cleaning system
US10926272B2 (en) * 2017-06-30 2021-02-23 Das Environmental Expert Gmbh Electrostatic precipitator and method for electrostatic precipitation of materials out of an exhaust gas flow

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2126130B (en) * 1982-09-02 1986-09-03 Nat Res Dev Removal of ions from charged powder clouds
CN104289313B (zh) * 2014-11-04 2017-03-29 河北大学 一种半湿式高压静电除尘电极

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3748828A (en) * 1970-11-06 1973-07-31 Akzo Belge Sa Process and apparatus for fluid-liquid contacting
US3979593A (en) * 1973-03-22 1976-09-07 Australian Atomic Energy Commission Detector for measuring a radioisotope tracer gas
US20050115406A1 (en) * 2002-07-12 2005-06-02 Hengst Gmbh & Co. Kg Electric separator with a rinsing cleaning system
US7115153B2 (en) * 2002-07-12 2006-10-03 Hengst Gmbh & Co. Kg Electric separator with a rinsing cleaning system
US10926272B2 (en) * 2017-06-30 2021-02-23 Das Environmental Expert Gmbh Electrostatic precipitator and method for electrostatic precipitation of materials out of an exhaust gas flow

Also Published As

Publication number Publication date
SE308931B (de) 1969-03-03
GB1176425A (en) 1970-01-01

Similar Documents

Publication Publication Date Title
US3114877A (en) Particle detector having improved unipolar charging structure
Battistoni et al. Resistive cathode detectors with bidimensional strip readout: Tubes and drift chambers
US3551674A (en) Liquid-rinsed precipitation electrode for a device for precipitating and collecting charged particles from a gas
US2957084A (en) Alpha air monitor
US2987459A (en) Gas cooled nuclear reactors
CN104570038A (zh) 一种快速测量氡浓度的方法及装置
US3688106A (en) Measuring the density, velocity and mass flow of gases
US3898465A (en) Imaging transducer for radiation particles
JP6139270B2 (ja) α放射能の測定システムおよびその測定方法
CN112764084B (zh) 一种β+放射性气溶胶探测装置
Caswell The average energy of beta-ray spectra
US3070692A (en) Sewage sludge density measuring apparatus
US3465147A (en) Gas flow nuclear detector cell utilizing thin scintillation material in a spiral arrangement
Farid et al. An ionization chamber and a Si-detector for lead-210 chronology
CN115877438A (zh) 浮动式核电厂高氡环境放射性气溶胶浓度监测方法及系统
US5117115A (en) Device for measuring the activity and volume of radioactive liquids
US3015729A (en) Apparatus for measuring the radioactivity of particles in a gas
KR102180970B1 (ko) 섬광체를 이용한 삼중수소 검출기
US3649834A (en) Laminar gas flow radiation detector
JPS62242838A (ja) ガス中に浮遊している微粒子の濃度を測定する方法及びその装置
US3189742A (en) Radioactivity measurement of airborne particulate matter
US2538632A (en) Combination beta and gamma chamber
JPS59137875A (ja) 核燃料要素の表面汚染密度測定法
JPH0635190Y2 (ja) 放射性ガス検出器
US2961543A (en) Monitoring apparatus for radioactive effluents from nuclear reactors