EP2403808A1 - Method and device for controlling the temperature of an uv assembly - Google Patents

Method and device for controlling the temperature of an uv assembly

Info

Publication number
EP2403808A1
EP2403808A1 EP10714440A EP10714440A EP2403808A1 EP 2403808 A1 EP2403808 A1 EP 2403808A1 EP 10714440 A EP10714440 A EP 10714440A EP 10714440 A EP10714440 A EP 10714440A EP 2403808 A1 EP2403808 A1 EP 2403808A1
Authority
EP
European Patent Office
Prior art keywords
temperature
lamp
enclosure
housing
attachment
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.)
Withdrawn
Application number
EP10714440A
Other languages
German (de)
French (fr)
Inventor
Christer Jungsand
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.)
Wallenius Water AB
Original Assignee
Wallenius Water 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 Wallenius Water AB filed Critical Wallenius Water AB
Publication of EP2403808A1 publication Critical patent/EP2403808A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • C02F1/30—Treatment of water, waste water, or sewage by irradiation
    • C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/32—Details relating to UV-irradiation devices
    • C02F2201/322—Lamp arrangement
    • C02F2201/3223—Single elongated lamp located on the central axis of a turbular reactor
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/32—Details relating to UV-irradiation devices
    • C02F2201/326—Lamp control systems
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/02—Temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/52—Cooling arrangements; Heating arrangements; Means for circulating gas or vapour within the discharge space

Definitions

  • the present invention relates to a method and device for controlling the temperature of UV generating lamps that e.g. are used in Advanced Oxidation Technology liquid treatment systems.
  • the applicant for the present invention has during a number of years been developing systems for treating liquids ranging from tap water to ballast water applications, putting different demands on the different applications.
  • the core of the systems is the so called Advanced Oxidation Technology or AOT that is very effective in treating the liquids without the use of harmful chemicals.
  • the AOT utilizes UV radiation, which is often created by UV lamps emitting radiation in a wavelength range of 130 - 400 nm, where some wavelengths have specific positive properties.
  • connection socket in one end of the lamp.
  • the tubular elongated lamp is placed in an enclosure through which the liquid to be treated flows with the connection socket outside the enclosure. Electrical wiring is attached to the socket.
  • the socket could be of different materials, where brass and plastic are just some examples.
  • the aim of the present invention is to optimize the function of the UV- lamps utilized in the treatment process depending on environmental variations regarding operation temperatures.
  • liquid treating device comprises a housing having an enclosure, an inlet and an outlet arranged to said housing for providing a liquid flow through said enclosure, UV radiating means attached to said housing and arranged in said enclosure, capable of emitting radiation in said enclosure within the range of 130 nm to 400 nm, wherein the device comprises a temperature controlling circuit arranged in the vicinity of the attachment of the lamp to the housing and capable of controlling the temperature around the attachment of said lamp.
  • the temperature controlling circuit comprises a heating member.
  • the heating member comprises a resistance circuit.
  • the temperature controlling circuit comprises a cooling member.
  • said temperature controlling circuit further comprises a temperature gauge capable of measuring the temperature around the attachment of the lamp.
  • said temperature controlling circuit further comprises a micro processor capable of controlling the temperature.
  • the temperature of the UV generating lamp is controlled such that the optimum operation temperature is maintained, whereby the light intensity is maximised.
  • the liquid treatment device could thus be used both for warm and cold liquids as well as in warm and cold environments.
  • the temperature closest to the lamp which affects the effect of the lamp the most, is controlled in the most efficient way.
  • the controlling circuit preferably utilises a temperature gauge for measuring the temperature around the attachment, which temperature measurements are used for controlling the amount of heat or cold to the lamp.
  • a resistance circuit which is of low power consumption
  • a micro processor is used for controlling the temperature controlling circuit.
  • the micro controller may be programmed to function in many different ways and with further devices and functions connected to the temperature controlling device. For instance, there might be more temperature gauges arranged to the device, such as for measuring the liquid inside the enclosure, i.e. the temperature of the liquid to be treated. Further, the micro controller may comprise power measurement means capable of measuring the power consumption of the heating/ cooling member in order to regulate and control the power in order to avoid overloading of components.
  • Fig. 1 shows a diagram for a UV lamp that is commonly used in water treatment units
  • Fig. 2 shows an example of a water treatment unit comprising the present invention
  • Fig. 3 shows a detailed view of the present invention connected to a treatment unit.
  • the intensity of a UV lamp is dependent on the temperature surrounding the lamp.
  • An ideal temperature span would be in the interval of 25-30 degrees Celsius.
  • the treatment unit according to Fig. 2 comprises a generally elongated tube 10, creating a treatment space and having an inlet 12 and an outlet 14. Inside the treatment space a quartz glass tube is arranged (not shown), inside which a lamp is arranged. The lamp is capable of generating light in the UV region, i.e. in the region of 150 to 400 nm. The lamp is connected to an end piece 16 which in turn is detachably connected to the tube 10.
  • the lamp is further connected to a drive unit 18 via a cable 20, which drive unit is capable of providing the necessary power to the lamp for emitting UV radiation inside the treatment space.
  • the drive unit is to this end connected to a power source via a power cable 21.
  • the end piece which the lamp is connected to is in many instances made of a metal such as brass, aluminium or the like. According to the invention it comprises a temperature controlling circuit 22, Fig. 3.
  • the temperature controlling circuit comprises a micro processor 24 with a function as will be described below.
  • the temperature controlling circuit is connected to a power supply via a cable 25.
  • the temperature circuit further comprises a heating member 26 connected to the end piece 16 and capable of providing heat to the connection between the lamp and the end piece.
  • the heating member could for example be a resistance circuit that heats the immediate surrounding the metal attachment when powered via the micro processor. It is however to be understood that other types of heating means could be used. However, it is advantageous if the heat circuit is low consuming.
  • the temperature control circuit 22 further preferably comprises a temperature gauge 28 connected to the micro processor and capable of measuring the temperature around the attachment.
  • the micro processor thus activates or shuts down the heat circuit depending on the temperature measured by the temperature gauge 28.
  • a heating element has been discussed but it is to be understood that also a cooling member could be used instead or together with the heating circuit, depending on the application, which cooling member in its simplest example could be a fan 30, but it is to be understood that a circuit with cooling media could be connected to the lamp attachment. If for example the treatment unit is to be used to treat warm liquids or is placed in a warm environment, the lamp needs to be cooled instead. Also if the treatment unit is used both in warm and cold environments both a heating circuit and a cooling circuit can be arranged to the lamp.

Landscapes

  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Physical Water Treatments (AREA)

Abstract

The present invention relates to a device to be used with a liquid treating device, which liquid treating device comprises a housing (10) having an enclosure, an inlet (12) and an outlet (14) arranged to said housing for providing a liquid flow through said enclosure, UV radiating means attached to said housing and arranged in said enclosure, capable of emitting radiation in said enclosure within the range of 150 nm to 400 nm, wherein the device comprises a temperature controlling circuit (22) arranged in the vicinity of the attachment (16) of the lamp to the housing and capable of controlling the temperature around the attachment of said lamp.

Description

METHOD AND DEVICE FOR CONTROLLING THE TEMPERATURE OF AN UV ASSEMBLY
TECHNICAL AREA
The present invention relates to a method and device for controlling the temperature of UV generating lamps that e.g. are used in Advanced Oxidation Technology liquid treatment systems.
TECHNICAL BACKGROUND
The applicant for the present invention has during a number of years been developing systems for treating liquids ranging from tap water to ballast water applications, putting different demands on the different applications. However, the core of the systems is the so called Advanced Oxidation Technology or AOT that is very effective in treating the liquids without the use of harmful chemicals.
The AOT utilizes UV radiation, which is often created by UV lamps emitting radiation in a wavelength range of 130 - 400 nm, where some wavelengths have specific positive properties.
It is quite common to use a tubular elongated UV lamp, arranged with a connection socket in one end of the lamp. The tubular elongated lamp is placed in an enclosure through which the liquid to be treated flows with the connection socket outside the enclosure. Electrical wiring is attached to the socket. The socket could be of different materials, where brass and plastic are just some examples.
For this mercury- type of UV-lamp there is a correlation between the surrounding temperature and the efficiency of the lamp. Because the lamps are used in many different applications, the temperature could be very different such as rather hot tap water to ballast water that is pumped into the ship and treated from a cold ocean. Because of this correlation the efficiency of the lamps could vary quite a lot, as is seen in the diagram of Fig. 1 , and there is a risk that the lamps are not functioning at their optimum capacity due to the working temperature. The variation in light intensity can be explained by the heat generation that takes place between the mercury core that emits the radiation and the direct contact with the attachment of the lamp in the glass tube.
BRIEF DESCRIPTION OF THE INVENTION The aim of the present invention is to optimize the function of the UV- lamps utilized in the treatment process depending on environmental variations regarding operation temperatures.
This aim is obtained by the features of the independent patent claim. Preferable embodiments of the present invention are found in the dependent patent claims.
According to a main aspect of the invention it is characterised in a device to be used with a liquid treating device, which liquid treating device comprises a housing having an enclosure, an inlet and an outlet arranged to said housing for providing a liquid flow through said enclosure, UV radiating means attached to said housing and arranged in said enclosure, capable of emitting radiation in said enclosure within the range of 130 nm to 400 nm, wherein the device comprises a temperature controlling circuit arranged in the vicinity of the attachment of the lamp to the housing and capable of controlling the temperature around the attachment of said lamp.
According to another aspect of the invention, it is characterised in that the temperature controlling circuit comprises a heating member.
According to a further aspect of the invention, it is characterised in that the heating member comprises a resistance circuit. According to yet an aspect of the invention, it is characterised in that the temperature controlling circuit comprises a cooling member.
According to a further aspect of the invention it is characterised in that said temperature controlling circuit further comprises a temperature gauge capable of measuring the temperature around the attachment of the lamp.
Preferably said temperature controlling circuit further comprises a micro processor capable of controlling the temperature.
The advantages with the present invention are several. Because of the present invention the temperature of the UV generating lamp is controlled such that the optimum operation temperature is maintained, whereby the light intensity is maximised. The liquid treatment device could thus be used both for warm and cold liquids as well as in warm and cold environments.
Because the temperature is controlled around the attachment of the lamp, the temperature closest to the lamp, which affects the effect of the lamp the most, is controlled in the most efficient way.
The controlling circuit preferably utilises a temperature gauge for measuring the temperature around the attachment, which temperature measurements are used for controlling the amount of heat or cold to the lamp.
When the lamp is to be heated a resistance circuit, which is of low power consumption, may be used. Preferably a micro processor is used for controlling the temperature controlling circuit. The micro controller may be programmed to function in many different ways and with further devices and functions connected to the temperature controlling device. For instance, there might be more temperature gauges arranged to the device, such as for measuring the liquid inside the enclosure, i.e. the temperature of the liquid to be treated. Further, the micro controller may comprise power measurement means capable of measuring the power consumption of the heating/ cooling member in order to regulate and control the power in order to avoid overloading of components.
These and other aspects of and advantages with the present invention will become apparent from the following detailed description and the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
In the detailed description, reference will be made to the accompanying drawings, of which
Fig. 1 shows a diagram for a UV lamp that is commonly used in water treatment units,
Fig. 2 shows an example of a water treatment unit comprising the present invention, and
Fig. 3 shows a detailed view of the present invention connected to a treatment unit.
DETAILED DESCRIPTION OF THE INVENTION
As is shown in figure 1 the intensity of a UV lamp is dependent on the temperature surrounding the lamp. An ideal temperature span would be in the interval of 25-30 degrees Celsius.
In order to ascertain this, the present invention has been developed and will be described in connection with an example of a water treatment unit marketed and sold by the applicant of the present invention. The treatment unit according to Fig. 2 comprises a generally elongated tube 10, creating a treatment space and having an inlet 12 and an outlet 14. Inside the treatment space a quartz glass tube is arranged (not shown), inside which a lamp is arranged. The lamp is capable of generating light in the UV region, i.e. in the region of 150 to 400 nm. The lamp is connected to an end piece 16 which in turn is detachably connected to the tube 10.
The lamp is further connected to a drive unit 18 via a cable 20, which drive unit is capable of providing the necessary power to the lamp for emitting UV radiation inside the treatment space. The drive unit is to this end connected to a power source via a power cable 21.
The end piece which the lamp is connected to is in many instances made of a metal such as brass, aluminium or the like. According to the invention it comprises a temperature controlling circuit 22, Fig. 3. The temperature controlling circuit comprises a micro processor 24 with a function as will be described below. The temperature controlling circuit is connected to a power supply via a cable 25.
The temperature circuit further comprises a heating member 26 connected to the end piece 16 and capable of providing heat to the connection between the lamp and the end piece. The heating member could for example be a resistance circuit that heats the immediate surrounding the metal attachment when powered via the micro processor. It is however to be understood that other types of heating means could be used. However, it is advantageous if the heat circuit is low consuming.
The temperature control circuit 22 further preferably comprises a temperature gauge 28 connected to the micro processor and capable of measuring the temperature around the attachment. The micro processor thus activates or shuts down the heat circuit depending on the temperature measured by the temperature gauge 28.
In the above embodiment, a heating element has been discussed but it is to be understood that also a cooling member could be used instead or together with the heating circuit, depending on the application, which cooling member in its simplest example could be a fan 30, but it is to be understood that a circuit with cooling media could be connected to the lamp attachment. If for example the treatment unit is to be used to treat warm liquids or is placed in a warm environment, the lamp needs to be cooled instead. Also if the treatment unit is used both in warm and cold environments both a heating circuit and a cooling circuit can be arranged to the lamp.
It is to be understood that the embodiments of the invention described above and shown in the drawings are to be regarded only as non- limiting examples of the invention and that it may be modified in many ways within the scope of the patent claims.

Claims

PATENT CLAIMS
1. Device to be used with a liquid treating device, which liquid treating device comprises a housing (10) having an enclosure, an inlet (12) and an outlet (14) arranged to said housing for providing a liquid flow through said enclosure, UV radiating means attached to said housing and arranged in said enclosure, capable of emitting radiation in said enclosure within the range of 150 nm to 400 nm, wherein the device comprises a temperature controlling circuit (22) arranged in the vicinity of the attachment ( 16) of the lamp to the housing and capable of controlling the temperature around the attachment of said lamp.
2. Device according to claim 1 , characterised in that the temperature controlling circuit comprises a heating member (26).
3. Device according to claim 2, characterised in that the heating member comprises a resistance circuit.
4. Device according to any of the claims 1 to 3, characterised in that the temperature controlling circuit comprises a cooling member
(30).
5. Device according to any of the preceding claims, characterised in that said temperature controlling circuit further comprises a temperature gauge (28) capable of measuring the temperature around the attachment of the lamp.
6. Device according to any of the preceding claims, characterised in that said temperature controlling circuit further comprises a micro processor (24) capable of controlling the temperature.
EP10714440A 2009-03-06 2010-03-04 Method and device for controlling the temperature of an uv assembly Withdrawn EP2403808A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0950128A SE535371C2 (en) 2009-03-06 2009-03-06 Apparatus for UV treatment of liquids including temperature gauges
PCT/EP2010/052738 WO2010100216A1 (en) 2009-03-06 2010-03-04 Method and device for controlling the temperature of an uv assembly

Publications (1)

Publication Number Publication Date
EP2403808A1 true EP2403808A1 (en) 2012-01-11

Family

ID=42235768

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10714440A Withdrawn EP2403808A1 (en) 2009-03-06 2010-03-04 Method and device for controlling the temperature of an uv assembly

Country Status (3)

Country Link
EP (1) EP2403808A1 (en)
SE (1) SE535371C2 (en)
WO (1) WO2010100216A1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4400270A (en) * 1980-04-18 1983-08-23 Adco Aerospace, Inc. Ultraviolet apparatus for disinfection and sterilization of fluids

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0236575B1 (en) * 1986-02-12 1989-11-15 BBC Brown Boveri AG Apparatus for the disinfection of liquids
WO1995009814A1 (en) * 1993-10-06 1995-04-13 Water Recovery Plc Uv apparatus for fluid treatment
KR20050004557A (en) * 2003-07-03 2005-01-12 (주)두원기전 Ultraviolet disinfection system
CN101248511B (en) * 2005-05-20 2010-12-22 特洛伊科技有限公司 Ultraviolet radiation lamp and source module and treatment system containing same
US7741617B2 (en) * 2006-03-28 2010-06-22 Trojan Technologies Fluid treatment system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4400270A (en) * 1980-04-18 1983-08-23 Adco Aerospace, Inc. Ultraviolet apparatus for disinfection and sterilization of fluids

Also Published As

Publication number Publication date
WO2010100216A1 (en) 2010-09-10
SE535371C2 (en) 2012-07-10
SE0950128A1 (en) 2010-09-07

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