US20080099185A1 - Method and Equipment for Heat Recovery - Google Patents

Method and Equipment for Heat Recovery Download PDF

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Publication number
US20080099185A1
US20080099185A1 US11/658,087 US65808705A US2008099185A1 US 20080099185 A1 US20080099185 A1 US 20080099185A1 US 65808705 A US65808705 A US 65808705A US 2008099185 A1 US2008099185 A1 US 2008099185A1
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US
United States
Prior art keywords
exhaust gas
heat
accordance
equipment
particles
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.)
Abandoned
Application number
US11/658,087
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English (en)
Inventor
Erling Naess
Otto Kristian Sonju
Torbjorn Slungaard
Bjorn Petter Moxnes
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Norsk Hydro ASA
NTNU Technology Transfer AS
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Individual
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
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Assigned to NTNU TECHNOLOGY TRANSFER AS, NORSK HYDRO ASA reassignment NTNU TECHNOLOGY TRANSFER AS ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SLUNGAARD, TORBJORN, NESS, ERLING, SONJU, OTTO KRISTIAN, MOXNES, BJORN PETTER
Publication of US20080099185A1 publication Critical patent/US20080099185A1/en
Priority to US14/088,942 priority Critical patent/US9732981B2/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H8/00—Fluid heaters characterised by means for extracting latent heat from flue gases by means of condensation
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
    • C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
    • C25C3/22—Collecting emitted gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
    • F28F1/30—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means being attachable to the element
    • 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
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D21/0001—Recuperative heat exchangers
    • F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Definitions

  • the present invention concerns a method and equipment for heat recovery from exhaust gas from a process plant, for instance raw-gas from an electrolysis plant for the production of aluminium.
  • exhaust gas may, before it is cleaned, contain dust and/or particles that will form deposits on the heat recovery equipment and thus reduce the efficiency of the heat recovery to an undesired, low level.
  • exhaust gas from aluminium electrolysis furnaces contains large amounts of energy at a relatively low temperature level.
  • This energy is currently utilized only to a small extent, but it can be used for heating purposes, process purposes and power production if technically and economically acceptable solutions for heat recovery are established.
  • the temperature level achieved in the heated fluid is decisive to the value and usefulness of the recovered thermal energy.
  • the heat should therefore be extracted from the exhaust gas at as high an exhaust gas temperature as possible.
  • Other examples of industrial processes that produce large exhaust gas volumes containing dust/particles are: Ferro-, alloy- and other smelting plant industries that typically operates with dust-containing exhaust gases at 300° C. and higher, and the low temperature section in waste incineration (i.e. economizer and air preheating sections) that typically operate at 300° C. and lower.
  • the exhaust gas from electrolysis furnaces is transported through a suction system by means of fans, and the power consumption of the fans depends on the volume flow of exhaust gas and the pressure drop in the system.
  • the power consumption can be reduced by a reduction of these quantities. Cooling the exhaust gas will contribute to reduced volume flow rate and pressure drop, with reduced fan power as a consequence. The largest reduction in pressure drop is achieved by cooling the exhaust gas as close to the aluminium cells as possible.
  • the suction can thereby be increased without the need of changing the dimensions of channels and gas cleaning plant.
  • the present invention can be utilised in accordance with the last mentioned technical solution, which will be the most economical one as the heat removed from the raw gas can be utilised in other processes or applications.
  • the process is here exemplified by a plant for aluminium production, and is characterised in that large amounts of exhaust gas (in the order of 5,000 Nm 3 /h per aluminium cell) containing low-temperature energy (typically approximately 120-140° C., but can be increased up to approximately 200° C.) being extracted/sucked from the aluminium cells.
  • the exhaust gas contains pollutants such as particles and gaseous components, which must be removed from the exhaust gas in a cleaning process before it can be emitted.
  • the energy content of the exhaust gas can be recovered in a heat exchanger (heat recovery system) in which the exhaust gas gives off heat (is cooled) to another fluid suitable for the application in question.
  • the heat recovery system can be located
  • the thickness of the deposited coating can be controlled using active or passive techniques.
  • Active techniques mean that the deposit is removed fully or partially by means of mechanical sweeping, hydraulic or pneumatic flushing/washing, impact or impulse sweeping or equivalent methods.
  • Passive techniques mean that no form of external equipment or appliance is used to control the particle deposit. It is instead controlled and limited by means of process parameters, for example the velocity of the exhaust gas.
  • the present invention includes a passive technique for limiting the deposit in the heat recovery system.
  • volume flow rate Reducing the volume flow rate produces a gain in the form of lower power consumption for the fans that drive the exhaust gas through the system.
  • a smaller volume flow rate can be achieved by means of
  • a reduction in the volume extracted/sucked from the electrolysis cells will normally not be possible, as it will imply increased pressure within their enclosures. Increased pressure will further make the cells more vulnerable to puncturing, resulting in an increase in gas and dust escaping to the work environment.
  • Reducing the amount of exhaust gas extracted will generally entail an increase in gas temperature out of the electrolysis cells (which reduces the gain from the reduced amount of gas) unless the exhaust gas is cooled before the fans.
  • the pressure drop in the system depends on the gas speed, which can be reduced by reducing the gas temperature.
  • the proposed solution entails a net reduction in power consumption for the fans precisely because the exhaust gas is cooled.
  • the heat recovered from the exhaust gas is available as process heat for various heating and processing purposes.
  • the purpose of the present invention is to recover heat from exhaust gas containing dust/particles from industrial processes, in particular aluminium cells, in one or more heat recovery systems located upstream of the gas cleaning process by using a passive technique to keep the coating deposits on the heat-recovery surfaces under control and to achieve stable operation.
  • FIG. 1 shows results from tests with elliptical, finned tubes
  • FIG. 2 shows a calculation of the heat exchanger volume for 120° C. inlet temperature to the heat recovery system, 6.5 MW thermal power. Exhaust gas flow rate: 440,000 Nm 3 /h, inlet temperature to the fan: 80° C. Results for the permitted pressure drop in the heat recovery system of 3,000 Pa are indicated,
  • FIG. 3 shows a calculation of the heat exchanger volume for 180° C. inlet temperature to the heat recovery system, 6.5 MW thermal power. Gas flow rate: 176,000 Nm 3 /h, inlet temperature to the fan: 80° C. Results for the permitted pressure drop in the heat recovery system of 4,000 Pa are indicated,
  • FIG. 4 shows test equipment for a heat recovery system embodiment with elliptical, finned tubes.
  • the heat recovery system may consist of one or more hollow elements such as tubes with a circular or elliptical/oval cross-section, with or without fins fitted on the outside of the tubes, see FIG. 4 .
  • the tubes may be made of carbon steel that has been treated in a galvanisation process. Other materials may also be relevant for this application, such as aluminium.
  • the external surfaces of the tubes that will be in contact with particles/dust may also be treated in accordance with relevant surface treatment techniques to produce an increased slip effect. Relevant slip coatings may also be included in such treatment techniques.
  • the exhaust gas flows on the outside of the tubes and perpendicular to the axial direction of the tubes.
  • the tubes are packed in a regular pattern with the centre-to-centre tube distance adjusted so that the mass flux (mass flow rate per unit of flow cross-section) and momentum of the exhaust gas are kept at a level at which a balance is achieved between particle deposition and particle removal on the heat-transfer surfaces.
  • the heat recovery system is enclosed by side walls and thus forms a channel through which the exhaust gas flows. No special requirements are made for the coolant that flows inside the tubes.
  • the coolant may consist of liquid/steam or gas such as water/steam or air.
  • This threshold is both geometry-specific and process-specific. Tests are carried out to identify the threshold value for some specific geometries ( ⁇ 36 mm circular tubes, ⁇ 36 mm circular tubes with ⁇ 72 mm annular fins, 14 ⁇ 36 mm elliptical tubes with rectangular fins) in a small-scale test setup. In the test, real exhaust gas from aluminium production is used, with particle concentration and particle distribution typical for this process.
  • the net particle/dust deposition on the heat transfer surfaces is controlled by the transport of particles/dust to the surface, adhesion at the surface and entrainment/removal from said surface.
  • the transport to the surface is influenced by the concentration of particles in the gas, together with convection, diffusion, and phoresis for small particles, while momentum forces and inertia forces are more dominant for larger particles.
  • the adhesion to the surface is influenced among other effects by van der Waal bonding forces, capillary forces, phoresis, and gravity.
  • Entrainment/removal of particles/dust from the surface is influenced by shear forces in the flow, grinding and collisions caused by larger particles that hits the surface, together with gravity forces.
  • a balance between particle deposition and particle entrainment/removal is achieved by the fact that the mechanisms causing the entrainment/removal of particles are augmented to a level that balance the deposition mechanisms.
  • these mechanisms can be expressed by characteristic gas velocities, whereby various velocities will give corresponding net thickness of the fouling layer. Said layer will insulate against the heat transfer.
  • characteristic gas velocities can in principle be established by theoretical calculations, but will in practice be determined by experiments and measurements, due of the complexity of the issue.
  • An optimised velocity will be a velocity that, for the given system, renders an acceptable reduction in heat transfer caused by fouling at stable conditions, without rendering a too high pressure drop. In the experiments carried out, acceptable raw gas velocities were measured to be approximately 12 metres/second or higher.
  • the exhaust gas temperature in the tests was approximately 130° C., and the tube wall temperature approximately 70° C.
  • An example of test results in shown in FIG. 1 (elliptical tubes with rectangular fins), where the resistance to heat transfer on account of the deposit layer (fouling factor) is shown as a function of time for various freestream gas mass fluxes.
  • a stable state (no change in the fouling factor) is typically achieved after 50-500 hours of operation at a gas velocity of approximately 11-13 m/s (equivalent to approximately 9.5-11 kg/m 2 s).
  • stable conditions occurred at a gas velocity of approximately 11 m/s (10 kg/m 2 s) after approximately 400 hours of operation.]
  • FIG. 2 and FIG. 3 Examples of dimensioning heat recovery systems for recovery of 6.5 MW heat from exhaust gas at 120° C. and 180° C. are shown in FIG. 2 and FIG. 3 . These examples are based on given pressure drop correlations and an assumed total pressure drop in the heat recovery systems equivalent to a power demand in the fans of 10%, respectively 5% of the energy recovered. In these examples, only designs with exhaust gas velocities (the velocity in the open flow cross-section in the heat recovery system) above approximately 11-13 m/s (9.5-11 kg/m 2 s) will achieve stable conditions. The other designs will experience unacceptably high deposits over time. As the figures show, only elliptical finned tubes will allow a velocity high enough for stable conditions to be achieved at the specific pressure drops.
  • the relationship between mass flux and momentum for the exhaust gas and stabilised coating resistance is a function of exhaust gas temperature and composition, plus particle concentration and distribution.
  • the pressure drop is a function of tube and fin geometry, tube packing, exhaust gas temperature and speed and total heat-transfer surface. The relationships demonstrated so far are therefore not universal. Whether a heat recovery system can operate with stable coating conditions and acceptable pressure drop depends on the process (temperature level, particle characteristics, requirements for thermal efficiency for the heat recovery system, etc.). The relationships found are, however, regarded as typical for applications for heat recovery from exhaust gas from aluminium production based on prebaked electrode technology.
  • tubes with circular and oval (elliptical) cross-sections have been mentioned.
  • the cross-section of the tubes may principally be designed as a wing section.
  • electrostatic or other similar methods may also be used to counteract deposit formation on the heat recovery surfaces.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Thermal Sciences (AREA)
  • Geometry (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Electrolytic Production Of Metals (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
US11/658,087 2004-07-23 2005-07-15 Method and Equipment for Heat Recovery Abandoned US20080099185A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US14/088,942 US9732981B2 (en) 2004-07-23 2013-11-25 Method and equipment for heat recovery

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NO20043150 2004-07-23
NO20043150A NO20043150D0 (no) 2004-07-23 2004-07-23 "Fremgangsmate og utstyr for varmegjenvining"
PCT/NO2005/000262 WO2006009459A1 (fr) 2004-07-23 2005-07-15 Procede et equipement de recuperation de chaleur

Related Parent Applications (1)

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PCT/NO2005/000262 A-371-Of-International WO2006009459A1 (fr) 2004-07-23 2005-07-15 Procede et equipement de recuperation de chaleur

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Application Number Title Priority Date Filing Date
US14/088,942 Division US9732981B2 (en) 2004-07-23 2013-11-25 Method and equipment for heat recovery

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US14/088,942 Active US9732981B2 (en) 2004-07-23 2013-11-25 Method and equipment for heat recovery

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US (2) US20080099185A1 (fr)
EP (1) EP1781840B1 (fr)
CN (1) CN101031673B (fr)
AU (1) AU2005264776B2 (fr)
BR (1) BRPI0513721B1 (fr)
CA (1) CA2574717C (fr)
NO (2) NO20043150D0 (fr)
RU (1) RU2385365C2 (fr)
WO (1) WO2006009459A1 (fr)
ZA (1) ZA200701194B (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO332375B1 (no) 2008-09-19 2012-09-10 Norsk Hydro As Punktmater med integrert avgassoppsamling samt en fremgangsmate for avgassoppsamling
NO337977B1 (no) 2008-10-31 2016-07-18 Norsk Hydro As Fremgangsmåte og anordning for ekstrahering av varme fra aluminium elektrolyseceller
EP2360296B1 (fr) 2010-01-21 2017-03-15 General Electric Technology GmbH Procédé de ventilation d'une cellule électrolytique de production d'aluminium
FR2960053B1 (fr) * 2010-05-12 2015-07-17 Solios Environnement Procede et dispositif de desencrassement d'echangeur de chaleur
FR2960289B3 (fr) * 2010-05-21 2012-05-11 Solios Environnement Procede et dispositif de desencrassement
EP2407228B1 (fr) * 2010-07-14 2016-09-07 General Electric Technology GmbH Unité de nettoyage des gaz et procédé de nettoyage des gaz
CN102154663A (zh) * 2011-03-10 2011-08-17 伊川龙海科技实业有限公司 一种利用铝电解生产烟气余热对氧化铝预热的方法
CN102134727B (zh) * 2011-03-10 2012-10-31 伊川龙海科技实业有限公司 一种电解槽余热回收利用的方法及装置
CN102853702A (zh) * 2012-09-17 2013-01-02 扬州埃克森能源发展有限公司 一种工业烟气余热极限式回收利用方法
CN105220177B (zh) * 2014-06-30 2017-12-08 沈阳铝镁设计研究院有限公司 铝电解槽强制通风余热利用装置及利用方法
RU2577502C1 (ru) * 2015-04-14 2016-03-20 Александр Иванович Абросимов Биметаллическая гравитационная тепловая труба
CN110614003A (zh) * 2016-06-15 2019-12-27 高境 去除气溶胶中细颗粒物的方法和系统
NO20190343A1 (en) 2019-03-14 2020-09-15 Norsk Hydro As Arrangement for collection of hot gas from an electrolysis process, and a method for such gas collection
CN112642265A (zh) * 2020-01-09 2021-04-13 高境 废气净化系统及净化方法
FR3112842A1 (fr) * 2020-07-24 2022-01-28 Reel Alesa Dispositif de refroidissement d’effluents gazeux provenant d’une installation pour la production d’aluminium par electrolyse ignee

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3752226A (en) * 1970-06-25 1973-08-14 O Bullock Environmental air control unit
US4270493A (en) * 1979-01-08 1981-06-02 Combustion Engineering, Inc. Steam generating heat exchanger
US4339249A (en) * 1977-11-30 1982-07-13 Stal-Laval Apparat Ab Heat exchanger for recovery of heat energy from dust-containing waste gases
US4482363A (en) * 1982-02-15 1984-11-13 Shell Oil Company Process for the cooling and separating of small particle-containing gases
US5639441A (en) * 1992-03-06 1997-06-17 Board Of Regents Of University Of Colorado Methods for fine particle formation
US5799725A (en) * 1993-09-17 1998-09-01 Evapco International, Inc. Heat exchanger coil assembly
US6337330B1 (en) * 1997-07-09 2002-01-08 Toray Industries, Inc. Antitussives
US20030178187A1 (en) * 2002-03-22 2003-09-25 Wanni Amar S. Heat exchanger flow-through tube supports
US20030178185A1 (en) * 2002-03-22 2003-09-25 Wanni Amar S. Heat exchanger with reduced fouling
US20030196781A1 (en) * 2002-04-23 2003-10-23 Wanni Amar S. Heat exchanger with floating head
US20060235350A1 (en) * 2005-03-23 2006-10-19 Oculus Innovative Sciences, Inc. Method of treating skin ulcers using oxidative reductive potential water solution
US20060253060A1 (en) * 2005-05-02 2006-11-09 Oculus Innovative Sciences, Inc. Method of using oxidative reductive potential water solution in dental applications
US20070017811A1 (en) * 2003-04-23 2007-01-25 Emt Research Asa Method for flow improvement and reduction of fouling in process equipment
US20070173755A1 (en) * 2006-01-20 2007-07-26 Oculus Innovative Sciences, Inc. Methods of treating or preventing peritonitis with oxidative reductive potential water solution

Family Cites Families (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1585754A (en) * 1921-03-03 1926-05-25 Kidwell Boiler Company Boiler apparatus for utilizing the waste gases from cement kilns
US2462136A (en) * 1945-05-24 1949-02-22 Samuel H Smith Heat exchanger and method of making same
DE1085889B (de) * 1953-07-08 1960-07-28 Mont Kessel Herpen & Co Komm G Aus Rohrtafeln bestehende Beruehrungsheizflaeche fuer Abhitze-Wasserrohrkessel
US4265301A (en) * 1976-04-06 1981-05-05 Anderson James H Heat exchanger support construction
US4099019A (en) * 1976-08-24 1978-07-04 Joetsu Denro Kogyo Co., Ltd. Electric furnace waste heat recovery method and apparatus
US4141702A (en) * 1977-07-11 1979-02-27 Quad Corporation Condensation cleaning of exhaust gases
DK155780C (da) * 1980-12-23 1989-10-02 Roedsgaard Jes Mathias Nordlie Fremgangsmaade til rensning af roeggasser fra varmeanlaeg samt et anlaeg til udoevelse af fremgangsmaaden
US4526112A (en) * 1982-08-10 1985-07-02 Heat Exchanger Industries, Inc. Heat exchanger method and apparatus
JPS59183297A (ja) 1983-03-31 1984-10-18 Kuraray Co Ltd 多管式熱交換器
AU595925B2 (en) * 1987-09-07 1990-04-12 Proizvodstvennoe Obiedinenie "Belgorodsky Zavod Energeticheskogo Mashinostroenia" Tunnel-type waste-heat boiler
DE3840460A1 (de) * 1988-12-01 1990-06-07 Mtu Muenchen Gmbh Waermetauscher
US5305945A (en) * 1989-09-12 1994-04-26 Modine Manufacturing Co. Finned assembly for heat exchangers
DE3934513C2 (de) * 1989-10-17 1996-06-13 Brueckner Trockentechnik Gmbh Abluftreinigungsanlage
FR2653544B1 (fr) * 1989-10-24 1992-02-14 Gaz De France Pompe a vapeur a echangeur air-produits de combustion a contre-courant sans fluide intermediaire.
US5318102A (en) * 1993-10-08 1994-06-07 Wahlco Power Products, Inc. Heat transfer plate packs and baskets, and their utilization in heat recovery devices
US5368096A (en) * 1993-12-02 1994-11-29 The Babcock & Wilcox Company Condensing heat exchanger scrubbing system
CA2157841A1 (fr) * 1994-09-12 1996-03-13 Gregory T. Bielawski Controle de la toxicite de l'air et extraction des vapeurs de gaz de combustion au moyen d'echangeurs de chaleur pour laveur d'air
US5603909A (en) * 1995-08-03 1997-02-18 The Babcock & Wilcox Company Selective catalytic reduction reactor integrated with condensing heat exchanger for multiple pollutant capture/removal
US5676715A (en) * 1996-02-13 1997-10-14 The Babcock & Wilcox Company Key advanced linear kinetic absorber system particulate arresting device
FI106223B (fi) * 1996-06-07 2000-12-15 Valmet Corp Lämmönvaihdin
DE19845258C1 (de) 1998-10-01 2000-03-16 Hamburger Aluminium Werk Gmbh Anlage zum Absaugen der Abgase und zur Nutzung ihrer Abwärme für eine Anlage zur Aluminiumschmelzflußelektrolyse mit mehreren Elektrolysezellen
US6240725B1 (en) * 2000-01-06 2001-06-05 Dominic E. Scappatura Internal combustion engine exhaust treating apparatus and method
JP2001263603A (ja) * 2000-03-24 2001-09-26 Sumitomo Heavy Ind Ltd 排ガスからの熱回収ボイラー
CA2311161C (fr) * 2000-06-02 2003-12-30 Actini Sa Procede de sterilisation mettant en oeuvre un echangeur tubulaire
JP4479117B2 (ja) * 2001-03-15 2010-06-09 アイシン精機株式会社 燃料改質装置
NO318012B1 (no) * 2003-03-17 2005-01-17 Norsk Hydro As Strukturelle elementer for benyttelse i en elektrolysecelle
DE102007031912A1 (de) * 2006-07-11 2008-02-07 Denso Corp., Kariya Abgaswärmetauscher
US8366902B2 (en) * 2008-03-24 2013-02-05 Battelle Energy Alliance, Llc Methods and systems for producing syngas
AU2011208759B2 (en) * 2010-01-21 2014-03-20 Air Products And Chemicals, Inc. Heat exchanger and method of operating a heat exchanger
AU2011201083B2 (en) * 2010-03-18 2013-12-05 Modine Manufacturing Company Heat exchanger and method of manufacturing the same
US8615983B2 (en) * 2010-05-07 2013-12-31 GM Global Technology Operations LLC Heat exchanger method and apparatus for engine exhaust gas recirculation system

Patent Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3752226A (en) * 1970-06-25 1973-08-14 O Bullock Environmental air control unit
US4339249A (en) * 1977-11-30 1982-07-13 Stal-Laval Apparat Ab Heat exchanger for recovery of heat energy from dust-containing waste gases
US4270493A (en) * 1979-01-08 1981-06-02 Combustion Engineering, Inc. Steam generating heat exchanger
US4482363A (en) * 1982-02-15 1984-11-13 Shell Oil Company Process for the cooling and separating of small particle-containing gases
US5639441A (en) * 1992-03-06 1997-06-17 Board Of Regents Of University Of Colorado Methods for fine particle formation
US5799725A (en) * 1993-09-17 1998-09-01 Evapco International, Inc. Heat exchanger coil assembly
US6337330B1 (en) * 1997-07-09 2002-01-08 Toray Industries, Inc. Antitussives
US20030178185A1 (en) * 2002-03-22 2003-09-25 Wanni Amar S. Heat exchanger with reduced fouling
US20030178187A1 (en) * 2002-03-22 2003-09-25 Wanni Amar S. Heat exchanger flow-through tube supports
US20030196781A1 (en) * 2002-04-23 2003-10-23 Wanni Amar S. Heat exchanger with floating head
US20070017811A1 (en) * 2003-04-23 2007-01-25 Emt Research Asa Method for flow improvement and reduction of fouling in process equipment
US20060235350A1 (en) * 2005-03-23 2006-10-19 Oculus Innovative Sciences, Inc. Method of treating skin ulcers using oxidative reductive potential water solution
US20060241546A1 (en) * 2005-03-23 2006-10-26 Oculus Innovative Sciences, Inc. Method of treating second and third degree burns using oxidative reductive potential water solution
US20060253060A1 (en) * 2005-05-02 2006-11-09 Oculus Innovative Sciences, Inc. Method of using oxidative reductive potential water solution in dental applications
US20070173755A1 (en) * 2006-01-20 2007-07-26 Oculus Innovative Sciences, Inc. Methods of treating or preventing peritonitis with oxidative reductive potential water solution
US20070196434A1 (en) * 2006-01-20 2007-08-23 Oculus Innovative Sciences, Inc. Methods of preventing or treating sinusitis with oxidative reductive potential water solution

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RU2385365C2 (ru) 2010-03-27
US20140069625A1 (en) 2014-03-13
EP1781840A1 (fr) 2007-05-09
CN101031673B (zh) 2012-06-27
NO20070800L (no) 2007-02-12
WO2006009459A1 (fr) 2006-01-26
CA2574717A1 (fr) 2006-01-26
AU2005264776A1 (en) 2006-01-26
BRPI0513721A (pt) 2008-05-13
CN101031673A (zh) 2007-09-05
EP1781840B1 (fr) 2014-11-19
EP1781840A4 (fr) 2012-08-15
NO20043150D0 (no) 2004-07-23
US9732981B2 (en) 2017-08-15
RU2007106895A (ru) 2008-09-10
BRPI0513721B1 (pt) 2016-04-19
CA2574717C (fr) 2012-07-10
ZA200701194B (en) 2015-09-25
NO339614B1 (no) 2017-01-16
AU2005264776B2 (en) 2011-01-06

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