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WO1993018833A1 - Processus et dispositif permettant d'accroitre la teneur de l'air en vapeur - Google Patents

Processus et dispositif permettant d'accroitre la teneur de l'air en vapeur Download PDF

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Publication number
WO1993018833A1
WO1993018833A1 PCT/SE1993/000228 SE9300228W WO9318833A1 WO 1993018833 A1 WO1993018833 A1 WO 1993018833A1 SE 9300228 W SE9300228 W SE 9300228W WO 9318833 A1 WO9318833 A1 WO 9318833A1
Authority
WO
WIPO (PCT)
Prior art keywords
air
heat exchanger
flow
flue gases
vapour
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.)
Ceased
Application number
PCT/SE1993/000228
Other languages
English (en)
Inventor
Hardy Sundberg
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.)
Individual
Original Assignee
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
Publication date
Application filed by Individual filed Critical Individual
Publication of WO1993018833A1 publication Critical patent/WO1993018833A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D1/00—Evaporating
    • B01D1/16—Evaporating by spraying
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L15/00—Heating of air supplied for combustion
    • F23L15/04—Arrangements of recuperators
    • 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
    • F24H8/003—Fluid heaters characterised by means for extracting latent heat from flue gases by means of condensation having means for moistening the combustion air with condensate from the combustion 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Definitions

  • the present invention relates to a process and an arrangement for considerably reducing the negative effect of flue gases on the environment.
  • the invention relates to an apparatus by which combustion air can be
  • vapour enrichment is derived from the energy released in the process of flue-gas condensation.
  • Polluted flue gases exert a negative effect on the environment inasmuch as they contain solid, liquid and gaseous impurities. Apart from the fact that the efficiency of a furnace can be increased by an order of magnitude of 20 - 25%. the discharges of dust and dust-borne impurities can be reduced by up to 90 - 95%, merely by condensation of the flue gases, while other gaseous and water-soluble impurities are separated from the flue gases and transferred to the
  • condensate Owing to the presence of chlorinous impurities in certain fuels the condensate is frequently highly acidic and can be subjected to further purification if necessary. This makes great demands on the structural material in the
  • a known method for achieving more efficient cooling of the flue gases and hence a further recycling of energy from the flue gases involves the use of a heat pump.
  • the cooling medium in the evaporator pertaining to the heat pump is vapourised by the heat released as the flue gases condense in the heat-pump evaporator. It is technically possible to cool the flue gases to temperatures below 0oC.
  • the main object of the present invention consists in providing a method enabling, in a particularly efficient manner, vapour enrichment of air, preferably combustion air. by making use of the energy released in the process of flue-gas condensation, thus enabling vapour enrichment to about 80oC, in which case each m 3 of combustion air contains latent energy in the form of 290 g water vapour.
  • a further object of the present invention is to provide an apparatus which is cheap to manufacture, easy and simple to maintain and possibly to clean, and which can readily be installed in existing combustion plant.
  • Yet another object of the invention consists in providing an apparatus enabling energy exchange between flue gases and combustion air without causing any substantial restriction of the gas and air flows.
  • the distance over which vapour enrichment can take place is relatively long.
  • the water is sprayed in at at least one but preferably several points along the air flow path in the heat exchanger in order to reduce the risk of excess water in the form of a thickened film of water settling on the surfaces of the heat exchanger.
  • condensate Depending on the type of fuel and its moisture content, it is, according to the invention, possible in certain cases to recirculate the condensate entirely to the combustion air.
  • Fig. 1 is a perspective view of a type of cross-flow heat exchanger which with the present invention can be used
  • Fig. 2 shows a heat exchanger according to Fig. 1 in schematic side-view with a first embodiment of the invention
  • Fig. 3 shows a heat exchanger according to Fig. 1 in schematic side-view with a second embodiment of the invention
  • Fig. 4 shows a cross-flow heat exchanger of rectangular cross-section with a third embodiment of the invention.
  • Fig. 1 shows a heat exchanger 1 of cross-flow type, said heat exchanger being already known.
  • Arrow 2 indicates air in the process of vapour enrichment, whereas arrow 3 indicates smoke discharging energy to the heat exchanger during
  • the heat exchanger consists of several stacked profiled plates a and b, with parallel flow ducts being formed between said profiled plates.
  • the profiles are so arranged as to ensure that the flow ducts on either side of a plate a, b pass one another at right angles. Inasmuch as they are
  • Fig. 2 shows heat exchanger 1 with air inlet 6 and air outlet 7 as well as smoke inlet 4 and smoke outlet 5. Between air inlet 6 and air outlet 7 there is a first separating screen 8, whereas a second separating screen 9 is arranged between smoke inlet 6 and smoke outlet 5.
  • the heat exchanger unit and screens are located within an insulated casing 10. Water-spray devices 11 are shown in part at air inlet 6 (11b) and in part (11a) at air-reversing screening devices (not shown).
  • Fig 3 shows a variation of the embodiment according to Fig. 2. whereby further screening devices 12 and 13 are arranged so as to bring about several opportunities for finely dispersed water to be supplied to the air. Otherwise said embodiment corresponds to the embodiment shown in Fig. 2.
  • screening devices 8' and 9' are in this case divided into two parts, whereas additional screening devices 12 and 13 are provided so as to constitute flow ducts for air and flue gas. With this embodiment three spray devices 11' are provided.
  • Fig. 4 shows an embodiment of rectangular cross-section over cross-flow heat exchanger 1', whereby the flue gases 3' pass straight through the heat exchanger, whereas air flow 2' passes several times in the direction from the flue-gas outlet (the right-hand end in the Figure) to the flue-gas inlet (the left-hand end in the Figure).

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Chimneys And Flues (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

L'invention a trait à un appareil qui permet d'accroître la teneur de l'air en vapeur et où l'énergie latente de gaz brûlés passe dans cet air. Cette invention se distingue en ce que l'air et les gaz brûlés passent sans se mélanger au travers d'un échangeur thermique, du type transversal ou à flux croisés. De l'eau et/ou de l'alcool finement pulvérisés sont diffusés dans l'air sous forme de brouillard et transformés en vapeur par la chaleur qui est libérée pendant le processus de condensation de la vapeur en eau se produisant dans les gaz brûlés.
PCT/SE1993/000228 1992-03-17 1993-03-17 Processus et dispositif permettant d'accroitre la teneur de l'air en vapeur Ceased WO1993018833A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9200810-1 1992-03-17
SE9200810A SE9200810L (sv) 1992-03-17 1992-03-17 Foerfarande och anordning foer uppaangning av luft daer latent energi fraan roekgaser vaexlas oever till luft

Publications (1)

Publication Number Publication Date
WO1993018833A1 true WO1993018833A1 (fr) 1993-09-30

Family

ID=20385640

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1993/000228 Ceased WO1993018833A1 (fr) 1992-03-17 1993-03-17 Processus et dispositif permettant d'accroitre la teneur de l'air en vapeur

Country Status (3)

Country Link
AU (1) AU3772893A (fr)
SE (1) SE9200810L (fr)
WO (1) WO1993018833A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7571900B2 (en) * 2002-11-27 2009-08-11 Hovalwerk Ag Method and device for cooling circulating air

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4287938A (en) * 1978-09-14 1981-09-08 Lagerquist Sven Gunnar Roy Method for exchanging heat and a device for carrying out said method
US4452180A (en) * 1982-09-30 1984-06-05 Hassan Kamal Eldin Indirect counterflow heat recovery system of the regenerative type for steam generators, gas turbines, and furnaces and engines in general
US4786301A (en) * 1985-07-01 1988-11-22 Rhodes Barry V Desiccant air conditioning system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4287938A (en) * 1978-09-14 1981-09-08 Lagerquist Sven Gunnar Roy Method for exchanging heat and a device for carrying out said method
US4452180A (en) * 1982-09-30 1984-06-05 Hassan Kamal Eldin Indirect counterflow heat recovery system of the regenerative type for steam generators, gas turbines, and furnaces and engines in general
US4786301A (en) * 1985-07-01 1988-11-22 Rhodes Barry V Desiccant air conditioning system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7571900B2 (en) * 2002-11-27 2009-08-11 Hovalwerk Ag Method and device for cooling circulating air
US8038129B2 (en) 2002-11-27 2011-10-18 Hovalwerk Ag Method and device for cooling circulating air

Also Published As

Publication number Publication date
SE469369B (sv) 1993-06-28
SE9200810D0 (sv) 1992-03-17
AU3772893A (en) 1993-10-21
SE9200810L (sv) 1993-06-28

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