WO2004088706A3 - Ultraviolet lamp - Google Patents

Ultraviolet lamp Download PDF

Info

Publication number
WO2004088706A3
WO2004088706A3 PCT/GB2004/001357 GB2004001357W WO2004088706A3 WO 2004088706 A3 WO2004088706 A3 WO 2004088706A3 GB 2004001357 W GB2004001357 W GB 2004001357W WO 2004088706 A3 WO2004088706 A3 WO 2004088706A3
Authority
WO
WIPO (PCT)
Prior art keywords
envelope
microwave
cavity
resonant cavity
gas
Prior art date
Application number
PCT/GB2004/001357
Other languages
French (fr)
Other versions
WO2004088706A2 (en
Inventor
James Lucas
A Ahmed Ibrahim Al-Shamma
Original Assignee
Univ Liverpool
James Lucas
A Ahmed Ibrahim Al-Shamma
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 Univ Liverpool, James Lucas, A Ahmed Ibrahim Al-Shamma filed Critical Univ Liverpool
Publication of WO2004088706A2 publication Critical patent/WO2004088706A2/en
Publication of WO2004088706A3 publication Critical patent/WO2004088706A3/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J65/00—Lamps without any electrode inside the vessel; Lamps with at least one main electrode outside the vessel
    • H01J65/04—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels
    • H01J65/042—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels by an external electromagnetic field
    • H01J65/044—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels by an external electromagnetic field the field being produced by a separate microwave unit
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
    • C01B13/10—Preparation of ozone
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/30—Treatment of water, waste water, or sewage by irradiation
    • C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
    • C02F1/325—Irradiation devices or lamp constructions
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2305/00—Use of specific compounds during water treatment
    • C02F2305/10—Photocatalysts

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Electromagnetism (AREA)
  • Inorganic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)

Abstract

There is disclosed an ultraviolet ('UV') lamp comprising a microwave-resonant cavity (2), a microwave source (6) arranged to supply microwave power to the cavity, an envelope (4) containing gas, the envelope comprising material which is at least substantially transparent to UV radiation at an emission frequency of the gas and projecting into the resonant cavity (2) whereby microwave energy is coupled into the envelope (4) providing an electrical field with the envelope (4), the microwave source (6) being driven at a power which is such that in a discharge zone within the resonant cavity (2) plasma discharge takes place, while in a UV emission zone of the envelope (4) outside the cavity (2) the kinetic energy imparted to an electron due to acceleration by the electrical field is less than the ionisation energy of the gas.
PCT/GB2004/001357 2003-04-01 2004-03-31 Ultraviolet lamp WO2004088706A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0307505A GB0307505D0 (en) 2003-04-01 2003-04-01 Ultraviolet lamp
GB0307505.8 2003-04-01

Publications (2)

Publication Number Publication Date
WO2004088706A2 WO2004088706A2 (en) 2004-10-14
WO2004088706A3 true WO2004088706A3 (en) 2005-01-20

Family

ID=9955956

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2004/001357 WO2004088706A2 (en) 2003-04-01 2004-03-31 Ultraviolet lamp

Country Status (2)

Country Link
GB (1) GB0307505D0 (en)
WO (1) WO2004088706A2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090120882A1 (en) * 2006-05-10 2009-05-14 Heraeus Noblelight Gmbh Device for Treating Fluids, Especially Water Sterilization, Comprising an Electrodeless Gas Discharge Lamp
GB2451873B (en) * 2007-08-15 2009-08-12 Jenact Ltd UV irradiator
CN102306611A (en) * 2011-06-07 2012-01-04 广东雪莱特光电科技股份有限公司 Super high power electrodeless ultraviolet lamp
US11229095B2 (en) 2014-12-17 2022-01-18 Campbell Soup Company Electromagnetic wave food processing system and methods
CN105762058B (en) * 2016-04-07 2019-07-26 深圳市高斯宝环境技术有限公司 A kind of microwave electrodeless ultraviolet light device
CN108172496A (en) * 2018-01-31 2018-06-15 广州正虹科技发展有限公司 A kind of photodissociation organic exhaust gas microwave plasma lamp

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0772226A2 (en) * 1995-11-06 1997-05-07 R.A. Jenton & Co. Limited Ultraviolet irradiating apparatus and components thereof
US6087783A (en) * 1998-02-05 2000-07-11 Purepulse Technologies, Inc. Method and apparatus utilizing microwaves to enhance electrode arc lamp emission spectra
US6409928B1 (en) * 1997-01-31 2002-06-25 Lynntech, Inc. Photocatalytic oxidation of organics using a porous titanium dioxide membrane and an efficient oxidant
US20020090430A1 (en) * 1996-09-10 2002-07-11 The Boc Group, Inc. Food processing method and system
WO2003021632A2 (en) * 2001-08-30 2003-03-13 Quay Technologies Limited Pulsed uv light source

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0772226A2 (en) * 1995-11-06 1997-05-07 R.A. Jenton & Co. Limited Ultraviolet irradiating apparatus and components thereof
US20020090430A1 (en) * 1996-09-10 2002-07-11 The Boc Group, Inc. Food processing method and system
US6409928B1 (en) * 1997-01-31 2002-06-25 Lynntech, Inc. Photocatalytic oxidation of organics using a porous titanium dioxide membrane and an efficient oxidant
US6087783A (en) * 1998-02-05 2000-07-11 Purepulse Technologies, Inc. Method and apparatus utilizing microwaves to enhance electrode arc lamp emission spectra
WO2003021632A2 (en) * 2001-08-30 2003-03-13 Quay Technologies Limited Pulsed uv light source

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
AL-SHAMMA'A A I ET AL: "Low-pressure microwave plasma ultraviolet lamp for water purification and ozone applications", JOURNAL OF PHYSICS D (APPLIED PHYSICS) IOP PUBLISHING UK, vol. 34, no. 18, 5 September 2001 (2001-09-05), pages 2775 - 2781, XP002298241, ISSN: 0022-3727 *

Also Published As

Publication number Publication date
WO2004088706A2 (en) 2004-10-14
GB0307505D0 (en) 2003-05-07

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