• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A purification arrangement for purifying a contaminated gaseous medium comprising :an ionizing equipment (3) for ionizing air;a supply pipe (1) for the supply of contaminated air; and at least one mixing chamber (2), wherein the contaminated air is fed through the mixing chamber (2) in a main flow and ionized air is added to the main flow; an inlet (10) for introducing ambient air into the main flow of the contaminated gaseous medium prior to the mixing chamber (2);a first temperature sensor (11) arranged in the supply pipe (1) prior to the inlet (10) and configured to detect the temperature of the contaminated gaseous medium;wherein if the temperature of the contaminated gaseous medium detected by the first temperature sensor (11) is above 70°C, ambient air is added through the inlet (10) into the main flow.
    公开号:SE1151245A1
    申请号:SE1151245
    申请日:2011-12-21
    公开日:2013-06-22
    发明作者:Yngve Saewstroem
    申请人:Airqone Building Scandinavia Ab；
    IPC主号:
    专利说明:

    PURIFICATION ARRANGEMENT Field of the lnvention The present invention relates to a purifying arrangement for purifying acontaminated gaseous medium. ln particular, the present invention relates toa purifying arrangement comprising an ionizing equipment for ionizing air andat least one mixing chamber whereby the contaminated medium is fedthrough the mixing chamber in a main flow and ionized air is added to themain flow from the side.
    Technical BackgroundThe demands on purifying exhausts from industries and the like are becoming larger as environmental consciousness increases in society.
    A way to purify gaseous media from, for example, solvent basedgases, paints etc such as benzine, paraffin, propene and other hydrocarbonsoccurs by means of ionizing. ln this form of purifying, the contaminated air ismixed with ionized air. The charged particles cause the contaminatingmolecules to be combined and precipitated out.
    An arrangement for exhaust gas purifying conforming with thepreamble to the enclosed patent claims is for example known from AT 387158 B whereby in a mixing chamber there is a main flow of contaminated airand a smaller flow of ionized air is added from the side.
    However, such a known arrangement is burdened with severalproblems. The most serious problem is that the cost for obtaining the desireddegree of purification is far too large or that the desired degree of purification is not possible to obtain at all.
    Summarv of the lnvention lt is accordingly an object of the present invention to provide apurification arrangement which is effective but still relatively cheap with regardto both investment costs and operation costs. 2According to an aspect of the present invention, it is therefore provided a purification arrangement for purifying a contaminated gaseous mediumcomprising an ionizing equipment for ionizing air, a supply pipe for the supplyof contaminated air, at least one mixing chamber; wherein the contaminatedair is fed through the mixing chamber in a main flow and ionized air is addedto the main flow, an inlet for introducing ambient air into the main flow of thecontaminated gaseous medium prior to the mixing chamber and a firsttemperature sensor arranged in the supply pipe prior to the inlet andconfigured to detect the temperature of the contaminated gaseous medium;wherein if the temperature of the contaminated gaseous medium detected bythe first temperature sensor is above 70°C, ambient air is added through theinlet into the main flow.
    The present invention is based on the realization that to provide animproved purification arrangement for purifying a contaminated gaseousmedium with ionizing air in the mixing chamber, the temperature and the flowof the ionizing air are substantially different from the contaminated gaseousmedium. Furthermore, it is also realized that the efficiency of the purificationprocess may be increased by maintaining the temperature of thecontaminated gaseous medium entering the mixing chamber below apredetermined temperature.
    The temperature of the contaminated gaseous medium that is suppliedin the supply pipe may be as high as 80-90°C. The contaminated gaseousmedium may for example comprise warm process air with a varying degree ofcontamination. At temperatures over 70°C, the reaction between ionizedparticles and the contaminated air in the mixing chamber of the purifyingarrangement does not work in an optimal way. The purification process takesplace in the mixing chamber wherein the contaminated gaseous medium ismixed with the ionized air and the purification process is improved when thetemperature of the contaminated gaseous medium is 70°C or lower.
    An advantage of the invention is that the temperature of thecontaminated gaseous medium is detected by the first temperature sensorand if the temperature of the contaminated gaseous medium exceeds 70°C, it is lowered to 70°C before the main flow reaches the mixing chamber so that 3the efficiency of the purification arrangement is improved. Ambient air is added to the main flow in the supply pipe when the first temperature sensordetects a temperature over 70°C. Ambient air is added through an inletarranged after the first temperature sensor in the supply pipe.
    Another advantage of the invention is that several mixing chamberscan be used to make the purifying arrangement more effective.
    A further advantage of the invention is that the inlet for ambient air mayalso be uti|ized to lower the temperature of the contaminated gaseousmedium further below the aforementioned predetermined limit by adding moreambient air to the main flow when the temperature of the ambient air is lowerthan the main flow. ln one embodiment of the invention, the purification arrangement mayfurther comprise a second temperature sensor arranged in the supply pipeafter the inlet, the second temperature sensor being configured to detect thetemperature of the contaminated gaseous medium, wherein a flow of ionizedair from the ionizing equipment is controlled based on the temperaturedetected by the second temperature sensor.
    An advantage of this embodiment is that the temperature of the mainflow of the contaminated gaseous medium may be lowered by adjusting theflow of the ionized airfrom the ionizing equipment.
    Another advantage is that by increasing the feeding of the ionized airinto the mixing chamber, the ionized air will penetrate down into the main flowquicker and will thereby increase the probability that a contaminatingmolecule is hit by ionized particles since more ionized particles are present inthe mixing chamber.
    According to one embodiment of the invention, the air to be ionized bythe ionizing equipment may advantageously be ambient air.
    An advantage with this embodiment is that it is effective and costefficient to use ambient air. The ambient air can be fresh air from outside thepurifying arrangement. ln one embodiment of the invention, the purification arrangement mayfurther comprise a cooling element configured to reduce the temperature of the main flow after the main flow has passed the mixing chamber. 4The cooling element may in another embodiment of the invention be arranged in the outlet pipe of the purifying arrangement.
    The temperature of the main flow after the purification process before itis let out of the outlet pipe should preferably not exceed 30°C. Thetemperature of the main flow may accordingly be controlled both by the flowof the ionizing air and by the cooling element. The cooling effect from the flowof the ionizing air is also dependent on the relation between the amount ofcontamination in the contaminated gaseous medium and the amount ofionized air required in order to achieve sufficient purification in the mixingchamber.
    An advantage of the cooling element is that it may cool the purified airto a predetermined temperature such as 30°C or below before the air leavesthe outlet pipe, thereby enabling the use of the air from the outlet in otherprocesses. ln some embodiments, a temperature sensor arranged in the main flowafter the mixing chamber may be used to detect whether the temperature ofthe main flow after the mixing chamber is above 30°C and if the temperatureexceeds this temperature, the main flow might be diverted through a coolingelement in connection with the outlet pipe in a flow separate from the outletpipe. The cooling element may for example be arranged in a separate pipe,wherein the separate pipe is attached to the outlet pipe and is configured tolet the main flow through if the temperature of the main flow exceeds 30°C. lfthe temperature is 30°C or less, this cooling step may be avoided and the airleaves the outlet pipe without passing the cooling element. The separate pipecomprising the cooling element may be reconnected with the outlet pipe afterthe cooling element so that the air leaves from the same outlet.
    By feeding the ionized air into the mixing chamber with a velocity whichsubstantially exceeds the flow velocity of the main flow the ionized air willquickly penetrate down into the main flow and thus the probability that acontaminating molecule of the main flow shall be hit by an ionized particle issubstantially increased.
    According to an embodiment of the invention, the ionized air is supplied further via several successively arranged openings in the flow 5direction of the main flow. ln this way the probability increases further and thereby also the degree of purification.
    According to an embodiment of the invention, at least three suchopenings may be arranged after each other.
    According to an embodiment of the invention, the flow velocity of theionized air may be at least 3 times as large as the flow velocity of the mainflow.
    According to an embodiment of the invention, the flow velocity of theionized air may be at least 5 times as large as the flow velocity of the mainflow.
    According to an embodiment of the invention, the flow velocity of theionized air may be about 10 times larger than the flow velocity of the mainflow.
    According to a further embodiment of the invention the ionized air maybe added to the main flow with a flow direction which has at least an angle of40 in relation to the flow direction of the main flow. By this means, the mixing is further improved.
    Brief Description of the Drawinqs These and other aspects of the present invention will now be describedin more detail with reference to the appended drawings showing an exampleembodiment of the invention, wherein: Fig. 1 schematically illustrates a purification arrangement according to an embodiment of the present invention.
    Detailed Description of Preferred Embodiments of the lnventionA purification arrangement according to an embodiment of the invention as illustrated in Fig. 1 comprises a supply pipe 1 for the supply ofcontaminated air, a purification part comprising three mixing chambers 2 andan outlet pipe 6 for removing purified air. A first temperature sensor 11 isarranged in the supply pipe 1. ln the present embodiment, three mixingchambers 2 are used but of course other numbers, such as one, two or more mixing chambers may equally well be used. ln between the first temperature 6sensor 11 and the mixing Chambers 2, an inlet 10 is arranged in the supply pipe 1 to let ambient air mix with the contaminated gaseous medium in thesupply pipe in order to lower the temperature of the main flow down to 70°Cwhen required. The criterion for letting ambient air into the supply pipe is thatthe first temperature sensor detects a temperature of contaminated gaseousmedium to above 70°C.
    A second temperature sensor 12 is attached to the supply pipe 1between the mixing chambers 2 and the inlet 10.
    The temperature sensors may for example comprise thermistors,thermocouples or resistive thermal devices, RTDs.
    Through the mixing chambers 2 a main flow of contaminated airoccurs. From the side, however, a further feed-flow of ionized air occurs. Thisair is ionized in an ionizing equipment 3 which comprises an electricallycharged surface which by corona-discharges gives off electrons to thesurrounding air. This air which shall be ionized must be relatively clean (AirQuality 1) to allow ionizing in a desired degree which, however, is the casewith usual fresh air. The air is conducted after it has been ionized via pipes 4to openings 5 in the sidewalls of the mixing chambers. Every mixing chamber2 is in this embodiment example provided with four openings 5 which arearranged successively after each other in the flow direction of the main flow.Other numbers of openings are, however, of course possible but it ispreferable to have more than one opening per chamber. More inlet openingsgive a better mixing but at the same time the speed (and the amount of gas)of the main flow increases which makes the purification process more difficultdownstream. The highest temperature of the main flow in the mixing chamber2 is preferably 70°C. The controlled flow from the openings 5 of the ionizingequipment 3 is based on the temperature detected by the secondtemperature sensor 12. The second temperature sensor 12 is configured todetect temperatures of at least 70°C and depending on the detectedtemperature, the flow of the ionized air will be adjusted. A higher detectedtemperature will increase the flow velocity of the ionizing air with regard to theproperties of the purification process. 7After the mixing Chambers 2, a cooling element 13 is arranged in the outlet pipe 6. The cooling element 13 is configured to cool the purified air to atemperature of 30°C or below before it is released into the ambient air or isrecycled for other use. The purified air will transfer the heat from the mainflow to the cooling element 13 thereby reducing the temperature of thepurified air. The cooling element 13 may for example comprise ribs attachedin the outlet pipe 6 arranged to let the purified air flow between the ribs on theway out of the outlet pipe 6. The ribs may enclose a cooling medium 13 suchas cold water which circulates and removes the heat from the purifiedgaseous medium as it flows past the ribs. The cooling medium may be anytype of medium suitable for heat removal. The cooling element 13 should notbe limited to the arrangement with ribs; the cooling element 13 may beexecuted in several different ways. The cooling element 13 may also be apipe arranged as a helix around the outlet pipe 6 in thermal contact with thepurified gaseous medium or any other type of heat exchanger known to theperson skilled in the art.
    A third temperature sensor 14 is arranged between the mixingchambers 2 and the cooling element 13 .The temperature sensor 14 isconfigured to control the cooling element 13 so that the cooling effect of thecooling element 13 varies depending on the temperature detected by thetemperature sensor 14. The cooling element 13 may for example becontrolled by regulating the flow of cooling medium in the cooling element 13such that if the temperature of the main flow after the mixing chambers 2 isbelow 30°C, no cooling medium flows in the cooling element 13.
    The flow velocity of the ionized air is preferably appreciably muchhigher than the flow velocity of the main flow. The velocity relationship issuitably at least 3/1 and preferably at least 5/1. The velocity difference isimportant for allowing the ionized air to penetrate into the main flow. How great the optimal velocity relationship is will however depend on the contamination concentration and the density of the gas which is to be purified.
    Higher density means that the speed should be higher and lower density thatthe speed should be lower. Usually a velocity relation of about 10/1 is to be preferred. The flow velocity of the ionized air should however be at least 0,5 8m/s so that the laws of mass inertia shall be applicable instead of the gas laws. Further, there is an upper critical velocity which is dependent on theshape of the openings 5. This upper velocity limit depends however on thetotal pressure but is usually about 18 m/s.
    The openings 5 should further be arranged so that the direction of flowfor the ionized air has an angle in relation to the flow direction of the mainflow. This angle should be at least 40° and the addition of ionized air occurspreferably perpendicularly to the main flow. How great the angle should bedepends however on the difference of density between the gases and theionizing energy.
    The purification arrangement according to the invention furthercomprises a control system 7. The control system 7 comprises a sensor 8and 9 for measuring the degree of contamination in the incomingcontaminated air and the purified outgoing air respectively. The differencebetween these values, for example given as a purification degree in the formof incoming contamination amount minus outgoing contamination amount anddivided with the incoming contamination amount, can later be used forconducting the purification arrangement. The result from the sensors 8, 9 istherefore sent via conduits to the ionizing equipment 3 and is used forconducting the ionizing degree and the flow velocity of the ionized air.Normally, an admixture of 20-30% ionized air in the main flow is desirable.The sensors may, for example, be commercially available photo-ionizinginstruments such as Photovac PID 2020 or Photovac IOS Plus.
    Further parameters can also be used for the regulation such as thedirect amount of impurities in the starting-air, the number of ions in theoutgoing air, etc. lt is also an advantage to let the flow-pipe for the main flow expandbefore the mixing chambers 2, as occurs in the embodiment example, to thusdecrease the flow velocity of the main flow through the mixing chambers 2. lt is further possible to combine the purification arrangement accordingto the invention with other types of purification such as filers of different kinds,etc. to further improve the purification effect in that way. The invention has been described above by means of an embodiment example. lt is however 9realized by a person skilled in the art that more variants are possible, some of which have been mentioned, without losing the invention idea. Such obviousvariants must therefore be regarded to be included in the present invention such as it is delimited by the following claims.
    权利要求:
    Claims (10)
    [1] 1. A purification arrangement for purifying a contaminated gaseousmedium comprising: an ionizing equipment (3) for ionizing air; a supply pipe (1 ) for the supply of contaminated air; and at least one mixing chamber (2), wherein the contaminated air is fedthrough the mixing chamber (2) in a main flow and ionized air is added to themain flow; an inlet (10) for introducing ambient air into said main flow of saidcontaminated gaseous medium prior to the mixing chamber (2); a first temperature sensor (11) arranged in said supply pipe (1) prior tosaid inlet (10) and configured to detect the temperature of the contaminatedgaseous medium; wherein if the temperature of the contaminated gaseous mediumdetected by said first temperature sensor (11) is above 70°C, ambient air isadded through said inlet (10) into said main flow.
    [2] 2. Purification arrangement according to claim 1, furthercomprising a second temperature sensor (12) arranged in said supply pipeafter said inlet (10) and configured to detect the temperature of thecontaminated gaseous medium; wherein a flow of ionized air from the ionizing equipment is controlled based on the temperature detected by said second temperature sensor (12).
    [3] 3. Purification arrangement according to any one of the precedingclaims, wherein the air to be ionized by said ionizing equipment (3) is ambient air.
    [4] 4. Purification arrangement according to any one of the precedingclaims, further comprising a cooling element (13) configured to reduce the 11temperature of the main flow after said main flow has passed said mixing Chamber (2).
    [5] 5. Purifying arrangement according to claim 4, further comprisingan outlet pipe (6), wherein said cooling element (13) is arranged in said outlet pipe (6)-
    [6] 6. Purification arrangement according to any one of the precedingclaims, wherein the ionized air is supplied via several openings (5) arrangedsuccessively after each other in the flow direction of the main flow.
    [7] 7. Purification arrangement according to any one of the precedingclaims, wherein at least three such openings (5) are arranged after eachother.
    [8] 8. Purification arrangement according to any one of the precedingclaims, wherein the flow velocity of the ionized air is at least 3 times as largeas the flow velocity of the main flow.
    [9] 9. Purification arrangement according to any one of the precedingclaims, wherein the flow velocity of the ionized air is at least 5 times as largeas the flow velocity of the main flow.
    [10] 10. Purification arrangement according to any one of the precedingclaims, wherein the flow velocity of the ionized air is about 10 times largerthan the flow velocity of the main flow.
    类似技术:
    公开号 | 公开日 | 专利标题
    JP5243900B2|2013-07-24|Solvent recovery equipment
    CA2867042C|2016-07-05|Oxyfuel combustion boiler system
    JP4787754B2|2011-10-05|Improved method for separating a gas from a gas mixture and apparatus for use in the method
    JP5769066B2|2015-08-26|Heat recovery system from incinerator exhaust gas
    SE1151245A1|2013-06-22|Gas medium purifier including means for controlled supply of ionized air
    WO2017017548A1|2017-02-02|Regeneration system for a metal hydride heat pump
    CA3010925A1|2017-07-27|Carbon dioxide separation/recovery device, combustion system using same, thermal power generation system using same, and method for separating and recovering carbon dioxide
    JP5255675B2|2013-08-07|Exhaust treatment system
    CN1046862C|1999-12-01|Gas-gas heater protection system and method
    JP2017194184A|2017-10-26|Exhaust gas treatment equipment and exhaust gas treatment method
    SI9300414A|1995-02-28|Process for exploitation heat energy, cleaning smoked or poluted air and improvement it by ozon
    CN202823122U|2013-03-27|Waste gas treatment device
    JP2021169090A|2021-10-28|Organic solvent gas removal device
    CN210332180U|2020-04-17|Exhaust gas treatment system
    JP3025129B2|2000-03-27|Operating method of boiler exhaust gas treatment device
    EP0718025A1|1996-06-26|Method for the recovery of ammonia escaping from a denitrification process
    RU2010154128A|2012-08-20|METHOD AND DEVICE FOR THERMAL BURNING OF EXHAUSTED AIR CONTAINING OXIDIZED SUBSTANCES
    Tate2012|Thermal oxidiser waste heat recovery
    WO2019097637A1|2019-05-23|Treatment system for gas containing organic solvent
    SU1314203A1|1987-05-30|Method for recovering waste heat energy of exhaust air
    JPH109780A|1998-01-16|Controlling method of outlet-side gas temperature in rotary type regenerative heat exchanger
    RU2262037C2|2005-10-10|Plant for thorough utilization of waste gas heat and method of avoidance of condensation in tail section of gas duct
    RU1788020C|1993-01-15|System for purifying and cooling blast furnace gas
    SU328928A1|1972-03-28|METHOD FOR REGULATING ADSORPTION BLOCKS
    CN201819567U|2011-05-04|Flue gas cooler capable of adjusting temperature
    同族专利:
    公开号 | 公开日
    EP2794070A1|2014-10-29|
    US9375680B2|2016-06-28|
    PL2794070T3|2017-11-30|
    CN104066495A|2014-09-24|
    EP2794070B1|2017-06-07|
    EP2794070A4|2015-09-09|
    SE536263C2|2013-07-23|
    CN104066495B|2016-07-13|
    CA2859776A1|2013-06-27|
    US20140314626A1|2014-10-23|
    WO2013095295A1|2013-06-27|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3188167A|1961-07-12|1965-06-08|Minerals & Chem Philipp Corp|Treatment of exhaust gases|
    US3949551A|1972-01-29|1976-04-13|Robert Bosch G.M.B.H.|Method and system for reducing noxious components in the exhaust emission of internal combustion engine systems and particularly during the warm-up phase of the engine|
    AT387158B|1987-04-03|1988-12-12|Zebinger Hans Dipl Ing|Device for the purification of exhaust gases|
    JPH07180539A|1993-12-24|1995-07-18|Mitsubishi Electric Corp|Chemical heat generating device|
    US5806305A|1994-05-18|1998-09-15|Lockheed Martin Corporation|Method and apparatus for reducing pollutants|
    US5750823A|1995-07-10|1998-05-12|R.F. Environmental Systems, Inc.|Process and device for destruction of halohydrocarbons|
    US5845485A|1996-07-16|1998-12-08|Lynntech, Inc.|Method and apparatus for injecting hydrogen into a catalytic converter|
    SE9701519L|1997-04-22|1998-02-09|Ekonomivaerme I Skaraborg Ab|Purification device for purifying a contaminated gas medium|
    US6036827A|1997-06-27|2000-03-14|Lynntech, Inc.|Electrolyzer|
    US5964089A|1997-06-27|1999-10-12|Lynntech, Inc|Diagnostics and control of an on board hydrogen generation and delivery system|
    DE19906159A1|1999-02-09|2000-08-10|Schering Ag|16-hydroxyestratrienes as selectively active estrogens|
    JP2004041847A|2002-07-09|2004-02-12|Daikin Ind Ltd|Air cleaning apparatus|
    DE102007040439A1|2007-08-28|2009-03-05|Daimler Ag|Operating and diagnostic procedures for an SCR exhaust aftertreatment system|
    DE102007046460A1|2007-09-28|2009-04-02|Daimler Ag|A method for reducing the emission of nitrogen dioxide in a motor vehicle with a lean-burn engine|
    DE102007047356A1|2007-10-02|2009-04-09|Langner, Manfred H.|Method and device for cleaning a hot air stream|
    DE102008036885A1|2008-08-07|2010-02-11|Daimler Ag|Method for operating an emission control system with an SCR catalytic converter|
    US8347857B2|2010-06-24|2013-01-08|GM Global Technology Operations LLC|Method and device for improving charged engines|SE538212C2|2013-06-20|2016-04-05|Exhaust gas purification system for combustion engine exhaust gas comprising an ionization air ionizing device|
    法律状态:
    2019-07-30| NUG| Patent has lapsed|
    优先权:
    申请号 | 申请日 | 专利标题
    SE1151245A|SE536263C2|2011-12-21|2011-12-21|Gas medium purifier including means for controlled supply of ionized air|SE1151245A| SE536263C2|2011-12-21|2011-12-21|Gas medium purifier including means for controlled supply of ionized air|
    CN201280067652.6A| CN104066495B|2011-12-21|2012-12-21|The arrangement of contaminated gas is purified with ionized air|
    PCT/SE2012/051492| WO2013095295A1|2011-12-21|2012-12-21|Arrangement for purifying contaminated gases with ionized air|
    US14/367,575| US9375680B2|2011-12-21|2012-12-21|Arrangement for purifying contaminated gases with ionized air|
    CA2859776A| CA2859776A1|2011-12-21|2012-12-21|Arrangement for purifying contaminated gases with ionized air|
    EP12860022.8A| EP2794070B1|2011-12-21|2012-12-21|Arrangement for purifying contaminated gases with ionized air|
    PL12860022T| PL2794070T3|2011-12-21|2012-12-21|Arrangement for purifying contaminated gases with ionized air|
    [返回顶部]