EP2515950A1 - Plate heat exchanger comprising uv generating members - Google Patents

Plate heat exchanger comprising uv generating members

Info

Publication number
EP2515950A1
EP2515950A1 EP10839892A EP10839892A EP2515950A1 EP 2515950 A1 EP2515950 A1 EP 2515950A1 EP 10839892 A EP10839892 A EP 10839892A EP 10839892 A EP10839892 A EP 10839892A EP 2515950 A1 EP2515950 A1 EP 2515950A1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
plate heat
plates
generating members
plate
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Withdrawn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
EP10839892A
Other languages
German (de)
French (fr)
Other versions
EP2515950A4 (en
Inventor
Johan Duprez
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 EP2515950A1 publication Critical patent/EP2515950A1/en
Publication of EP2515950A4 publication Critical patent/EP2515950A4/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Withdrawn legal-status Critical Current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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F28F19/02—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings
    • F28F19/06—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings of metal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • F28F21/081—Heat exchange elements made from metals or metal alloys
    • F28F21/086—Heat exchange elements made from metals or metal alloys from titanium or titanium alloys
    • 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
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/02—Non-contaminated water, e.g. for industrial water supply
    • C02F2103/023—Water in cooling circuits
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/20—Prevention of biofouling
    • 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
    • C02F2305/02—Specific form of oxidant
    • C02F2305/023—Reactive oxygen species, singlet oxygen, OH radical
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
    • F28D9/0043—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
    • F28D9/005—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another the plates having openings therein for both heat-exchange media
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
    • F28F2265/20—Safety or protection arrangements; Arrangements for preventing malfunction for preventing development of microorganisms

Definitions

  • Plate heat exchanger comprising UV generating members
  • the present invention relates to a device for treatment of fluids and in particular a device that prevents the build-up of organic matter on surfaces of plate heat exchangers.
  • Heat exchangers are used in many applications and for many purposes where energy in one media is extracted in order to obtain and use the energy.
  • the applications are numerous and water is often used as one media that flows through a heat exchanger.
  • heat exchangers of a plate-type configuration are used, where a plurality of plates are stacked on each other, forming channels between the plates. The two media are then introduced in the channels, one media in every second channel. Due to the large heat transferring surfaces of the heat exchanger, the heat from one media is transferred to the other media.
  • biofilms Depending on type of application and type of media, it may contain organic matter that will deposit on the surfaces of the plate exchanger and also grow on the surfaces, especially if the conditions for this are good, creating growth of organisms, fungi, bacteria, viruses and the like, i.e. biofilms. These biofilms degrade heat transfer efficiency, increase pressure drop (and pumping power required) through exchanger tubes and plates by substantially reducing the transfer capability due to insulation effects as well as flow rates through these machines, and can lead to corrosion problems under the film.
  • the aim of the present invention is to remedy most drawbacks with the state of the art systems and to provide a system which definitely and totally removes any unwanted matter.
  • a plate heat comprising a number of plates stacked on top of each other, UV generating members arranged such that surfaces of said plates are radiated with UV light at the inlet of the plate heat exchanger.
  • at least the irradiated surfaces of said plates are arranged with material displaying photo-catalytic properties, whereby said UV light in combination with said catalytic surfaces create radicals, which radicals are effective in treating fluid through the heat exchanger as well as removing and preventing scale on said surfaces of the heat exchanger.
  • the surfaces of the plates are made of or covered with, titanium, which surfaces have been treated to form titanium dioxide.
  • UV generating members also are arranged at the outlet of the heat exchanger.
  • it further comprises a net made of or covered with a material displaying photo-catalytic properties and positioned in the vicinity of said UV generating members.
  • the advantages of the present invention are several.
  • the application of UV- light in the plate exchanger will promote the removal of any biofilm on the surfaces of the plate heat exchanger as well as prevent any build-up of biofilm.
  • the radicals are extremely powerful in destroying any matter in the water, whereby no biofilm can be built up in the heat exchanger. Also if a treatment member according to the invention is connected to a heat exchanger having biofilm on its surfaces, the radicals will effectively remove the biofilm.
  • the surfaces of the heat exchanger are display photo- catalytic properties, but plate exchangers may be made by other material that do not display any catalytic properties.
  • catalysts may be placed in the inlet and radiated, such as nets comprising titanium dioxide. Of course both catalytic surfaces and catalytic nets may be used.
  • Fig. 1 shows schematically the layout and function of a plate heat exchanger
  • Fig. 2 shows schematically a heat exchanger arranged with treatment means at an inlet of the heat exchanger.
  • the system according of the present invention shown schematically in the drawings is utilizing AOT, i.e. Advanced Oxidation Technology as a treatment function.
  • AOT i.e. Advanced Oxidation Technology
  • the AOT technology is based on UV-light and catalysts for creating radicals, which act to destroy and decompose many organisms and matter.
  • a plate heat exchanger 10 provided with a number of plates, between which channels run, Fig. 1.
  • the channels are arranged such that one fluid runs in every second channel and a second fluid in every second channel.
  • the plates of the heat exchanger 10 are made of or covered with titanium treated to create titanium dioxide.
  • the inlet 12 of the heat exchanger 10, through which the fluid to be treated is intended to run, is provided with UV generating members 14, Fig. 2, such as UV lamps, capable of emitting UV radiation.
  • a net 16 covered by or made of, titanium, and treated to create titanium dioxide, is also placed in the inlet.
  • the UV lamps 14 thus radiate the surfaces of the plate heat exchanger as well as the net 16, whereby a photo-catalytic reaction creates a large amount of radicals, which radicals effectively destroys any organisms and other matter in the liquid as well as removes any biofilm that may have been built up on the surfaces of the heat exchanger. Further use of the UV lamps will effectively prevent any build-up of biofilm on the surfaces. It is to be understood that the UV lamps may also be placed at the outlet of the plate heat exchanger for further treatment of the fluid. It is to be understood that the embodiment described above and shown in the drawings is to be regarded only as a non-limiting example of the invention and that it may be modified in many ways within the scope of the patent claims.

Abstract

The present invention relates to a plate heat exchanger comprising a number of plates (10) stacked on top of each other, UV generating members (14) arranged such that surfaces of said plates (10) are radiated with UV light at the inlet (12) of the plate heat exchanger.

Description

Plate heat exchanger comprising UV generating members
TECHNICAL AREA
The present invention relates to a device for treatment of fluids and in particular a device that prevents the build-up of organic matter on surfaces of plate heat exchangers.
BACKGROUND OF INVENTION
Heat exchangers are used in many applications and for many purposes where energy in one media is extracted in order to obtain and use the energy.
The applications are numerous and water is often used as one media that flows through a heat exchanger. Also, often heat exchangers of a plate-type configuration are used, where a plurality of plates are stacked on each other, forming channels between the plates. The two media are then introduced in the channels, one media in every second channel. Due to the large heat transferring surfaces of the heat exchanger, the heat from one media is transferred to the other media.
Depending on type of application and type of media, it may contain organic matter that will deposit on the surfaces of the plate exchanger and also grow on the surfaces, especially if the conditions for this are good, creating growth of organisms, fungi, bacteria, viruses and the like, i.e. biofilms. These biofilms degrade heat transfer efficiency, increase pressure drop (and pumping power required) through exchanger tubes and plates by substantially reducing the transfer capability due to insulation effects as well as flow rates through these machines, and can lead to corrosion problems under the film.
Several attempts have been made for removing the biofilm, mainly including
treatment with chemicals. However this is not very environmentally friendly and requires thus closed systems where the heat exchangers are flushed with a solvent. This treatment also requires a shut-down of the system during cleaning which negatively affects the production. Other attempts of removing the biofilm comprise the use of ozone that is injected into the system. It has been found that ozone both removes the film but also prevents film from being created on surfaces. Even though ozone is capable of destroying most microorganisms like algae and bacteria by rupturing their cell walls, a process to which microorganisms cannot develop immunity, some organisms require more powerful treatment or longer exposure times than what is really practical in many applications.
BRIEF DESCRIPTION OF INVENTION
The aim of the present invention is to remedy most drawbacks with the state of the art systems and to provide a system which definitely and totally removes any unwanted matter.
This aim is obtained by a system defined by the features of the independent patent claim.
Preferable embodiments of the invention form the subject of the dependent patent claims. According to a main aspect of the invention it is characterised by a plate heat comprising a number of plates stacked on top of each other, UV generating members arranged such that surfaces of said plates are radiated with UV light at the inlet of the plate heat exchanger. According to another aspect of the invention, at least the irradiated surfaces of said plates are arranged with material displaying photo-catalytic properties, whereby said UV light in combination with said catalytic surfaces create radicals, which radicals are effective in treating fluid through the heat exchanger as well as removing and preventing scale on said surfaces of the heat exchanger.
According yet another aspect of the invention, the surfaces of the plates are made of or covered with, titanium, which surfaces have been treated to form titanium dioxide. According to a further aspect of the invention, UV generating members also are arranged at the outlet of the heat exchanger.
According to yet a further aspect of the invention, it further comprises a net made of or covered with a material displaying photo-catalytic properties and positioned in the vicinity of said UV generating members.
The advantages of the present invention are several. The application of UV- light in the plate exchanger will promote the removal of any biofilm on the surfaces of the plate heat exchanger as well as prevent any build-up of biofilm.
The application of material displaying catalytic properties in the heat exchanger and irradiating it with UV light will create a very strong oxidation effect in that large amounts of radicals are created.
The radicals are extremely powerful in destroying any matter in the water, whereby no biofilm can be built up in the heat exchanger. Also if a treatment member according to the invention is connected to a heat exchanger having biofilm on its surfaces, the radicals will effectively remove the biofilm.
It is of course preferable if the surfaces of the heat exchanger are display photo- catalytic properties, but plate exchangers may be made by other material that do not display any catalytic properties. Then catalysts may be placed in the inlet and radiated, such as nets comprising titanium dioxide. Of course both catalytic surfaces and catalytic nets may be used.
These and other aspects of, and advantages with, the present invention will become apparent from the following detailed description of the invention and from the accompanying drawings.
BRIEF DESCRIPTION OF DRAWINGS
In the following detailed description of the invention, reference will be made to the accompanying drawings, of which Fig. 1 shows schematically the layout and function of a plate heat exchanger, and Fig. 2 shows schematically a heat exchanger arranged with treatment means at an inlet of the heat exchanger.
DETAILED DESCRIPTION OF THE INVENTION
The system according of the present invention shown schematically in the drawings is utilizing AOT, i.e. Advanced Oxidation Technology as a treatment function. The AOT technology is based on UV-light and catalysts for creating radicals, which act to destroy and decompose many organisms and matter.
According to the invention, it comprises a plate heat exchanger 10 provided with a number of plates, between which channels run, Fig. 1. The channels are arranged such that one fluid runs in every second channel and a second fluid in every second channel.
In order to have maximum efficiency in treating the fluid that runs in the channel, the plates of the heat exchanger 10 are made of or covered with titanium treated to create titanium dioxide. Further the inlet 12 of the heat exchanger 10, through which the fluid to be treated is intended to run, is provided with UV generating members 14, Fig. 2, such as UV lamps, capable of emitting UV radiation. A net 16 covered by or made of, titanium, and treated to create titanium dioxide, is also placed in the inlet.
The UV lamps 14 thus radiate the surfaces of the plate heat exchanger as well as the net 16, whereby a photo-catalytic reaction creates a large amount of radicals, which radicals effectively destroys any organisms and other matter in the liquid as well as removes any biofilm that may have been built up on the surfaces of the heat exchanger. Further use of the UV lamps will effectively prevent any build-up of biofilm on the surfaces. It is to be understood that the UV lamps may also be placed at the outlet of the plate heat exchanger for further treatment of the fluid. It is to be understood that the embodiment described above and shown in the drawings is to be regarded only as a non-limiting example of the invention and that it may be modified in many ways within the scope of the patent claims.

Claims

PATENT CLAIMS
1. Plate heat exchanger comprising
- a number of plates stacked on top of each other,
- UV generating members arranged such that surfaces of said plates are radiated with UV light at the inlet of the plate heat exchanger.
2. Plate heat exchanger according to claim 1 , wherein at least the irradiated surfaces of said plates are arranged with material displaying photo-catalytic properties, whereby said UV light in combination with said catalytic surfaces create radicals, which radicals are effective in treating fluid through the heat exchanger as well as removing and preventing scale on said surfaces of the heat exchanger.
3. Plate heat exchanger according to clam 2, wherein the surfaces of the plates are made of or covered with, titanium, which surfaces have been treated to form titanium dioxide.
4. Plate heat exchanger according to clam 1 , wherein UV generating members also are arranged at the outlet of the heat exchanger.
5. Plate exchanger according to any of the preceding claims, wherein it further comprises a net made of or covered with a material displaying photo-catalytic properties and positioned in the vicinity of said UV generating members.
EP10839892.6A 2009-12-21 2010-12-20 Plate heat exchanger comprising uv generating members Withdrawn EP2515950A4 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0950999A SE534513C2 (en) 2009-12-21 2009-12-21 Plate heat exchangers including UV-generating devices
PCT/SE2010/051423 WO2011078771A1 (en) 2009-12-21 2010-12-20 Plate heat exchanger comprising uv generating members

Publications (2)

Publication Number Publication Date
EP2515950A1 true EP2515950A1 (en) 2012-10-31
EP2515950A4 EP2515950A4 (en) 2014-02-26

Family

ID=44196028

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10839892.6A Withdrawn EP2515950A4 (en) 2009-12-21 2010-12-20 Plate heat exchanger comprising uv generating members

Country Status (3)

Country Link
EP (1) EP2515950A4 (en)
SE (1) SE534513C2 (en)
WO (1) WO2011078771A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016092083A1 (en) * 2014-12-12 2016-06-16 Koninklijke Philips N.V. Cooling apparatus for cooling a fluid by means of surface water
CN107003092B (en) * 2014-12-12 2020-11-13 皇家飞利浦有限公司 Cooling device for cooling a fluid with the aid of surface water
RU2695234C2 (en) * 2014-12-12 2019-07-22 Конинклейке Филипс Н.В. Cooling device for cooling of fluid medium by means of water of surface layers
BR112018014580A2 (en) 2016-01-20 2018-12-11 Koninklijke Philips Nv device having surfaces to be subjected to an anti-fouling action and method for designing such device

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JPS6266040A (en) * 1985-09-13 1987-03-25 Matsushita Electric Ind Co Ltd Air conditioning ventilation fan with sterilizing lamp
JPS63162091A (en) * 1986-12-24 1988-07-05 Hitachi Ltd Device for preventing sticking of aquatic living matter
JPH0478709A (en) * 1990-07-19 1992-03-12 Isuzu Motors Ltd Feeling control type air conditioner for vehicle
JP2000320854A (en) * 1999-05-13 2000-11-24 Sharp Corp Indoor machine of air-conditioner
US6280686B1 (en) * 1997-02-20 2001-08-28 Steril-Aire U.S.A., Inc. Control of health hazards in an air handler
WO2002040179A2 (en) * 2000-11-15 2002-05-23 Shurflo Pump Manufacturing Company, Inc. Rapid comestible fluid dispensing apparatus and method employing a diffuser
JP2006242390A (en) * 2005-02-28 2006-09-14 Central Res Inst Of Electric Power Ind Heat exchanger

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JPH10185228A (en) * 1996-12-24 1998-07-14 Diamond Electric Mfg Co Ltd Air conditioner with deodorizing and antibacterial function
JP2000234894A (en) * 1999-02-12 2000-08-29 Zexel Corp Air-conditioning unit
JP3728722B2 (en) * 2000-11-15 2005-12-21 株式会社カントー Heat exchanger for bathtub
US6978793B1 (en) * 2003-05-21 2005-12-27 Phex Llc Portable cleaning apparatus and method for single pass plate and frame heat exchangers
AU2006274424B2 (en) * 2005-07-29 2013-05-16 Freedom Water Company Ltd. Water condenser

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Publication number Priority date Publication date Assignee Title
JPS6266040A (en) * 1985-09-13 1987-03-25 Matsushita Electric Ind Co Ltd Air conditioning ventilation fan with sterilizing lamp
JPS63162091A (en) * 1986-12-24 1988-07-05 Hitachi Ltd Device for preventing sticking of aquatic living matter
JPH0478709A (en) * 1990-07-19 1992-03-12 Isuzu Motors Ltd Feeling control type air conditioner for vehicle
US6280686B1 (en) * 1997-02-20 2001-08-28 Steril-Aire U.S.A., Inc. Control of health hazards in an air handler
JP2000320854A (en) * 1999-05-13 2000-11-24 Sharp Corp Indoor machine of air-conditioner
WO2002040179A2 (en) * 2000-11-15 2002-05-23 Shurflo Pump Manufacturing Company, Inc. Rapid comestible fluid dispensing apparatus and method employing a diffuser
JP2006242390A (en) * 2005-02-28 2006-09-14 Central Res Inst Of Electric Power Ind Heat exchanger

Non-Patent Citations (1)

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Title
See also references of WO2011078771A1 *

Also Published As

Publication number Publication date
WO2011078771A1 (en) 2011-06-30
EP2515950A4 (en) 2014-02-26
SE534513C2 (en) 2011-09-13
SE0950999A1 (en) 2011-06-22

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