EP0130065A1 - Verbesserung in bezug auf die Verbrennung - Google Patents

Verbesserung in bezug auf die Verbrennung Download PDF

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Publication number
EP0130065A1
EP0130065A1 EP84304239A EP84304239A EP0130065A1 EP 0130065 A1 EP0130065 A1 EP 0130065A1 EP 84304239 A EP84304239 A EP 84304239A EP 84304239 A EP84304239 A EP 84304239A EP 0130065 A1 EP0130065 A1 EP 0130065A1
Authority
EP
European Patent Office
Prior art keywords
combustion
iron oxide
combustion process
boiler
scale
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.)
Granted
Application number
EP84304239A
Other languages
English (en)
French (fr)
Other versions
EP0130065B1 (de
Inventor
Leonard Rhys Hardy
Richard Geoffrey Ayre
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
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AT84304239T priority Critical patent/ATE38852T1/de
Publication of EP0130065A1 publication Critical patent/EP0130065A1/de
Application granted granted Critical
Publication of EP0130065B1 publication Critical patent/EP0130065B1/de
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L10/00—Use of additives to fuels or fires for particular purposes
    • C10L10/04—Use of additives to fuels or fires for particular purposes for minimising corrosion or incrustation

Definitions

  • the present invention relates to the reduction of undesirable combustion by-products in boilers, incinerators and similar plant.
  • organic compounds containing metals such as lead, cobalt, manganese, copper, nickel and chromium chromium can under certain conditions function as soot destroyers or combustion aids and it has been proposed to add these metals to fuels to provide for more complete combustion of the fuel to C0 2 and H 2 0.
  • soot destroyers or combustion aids it has been proposed to add these metals to fuels to provide for more complete combustion of the fuel to C0 2 and H 2 0.
  • the relatively large amounts of these metals which must be added to the fuel to give a significant improvement causes the fuel to become so unstable that the catalytic properties of these metals cannot be used. This effect can be offset by adding stabilisers or antioxidents to the fuel but again, large amounts are required which renders this economically impractical and gives rise to further disadvantageous secondry effects.
  • the present invention provides a combustion process comprising passing combustion air over an ignited fossil fuel in a combustion chamber and prior to or during combustion introducing into the combustion chamber finely divided iron oxide which acts during combustion to reduce the amount of solid combustion by- products deposited in flue passes and chimneys of the combustion chamber during the combustion process.
  • the substance is introduced during the combustion process, although it may also be introduced prior to combustion in the fueld.
  • a preferred substance is sesquioxide of iron (Fe 2 0 3) .
  • the present invention stems from the unexpected discovery that the addition into the combustion zone of finely divided iron oxide particles alone or mixed with an inert material in small quantities significantly reduces the formation and deposition of scale, smut and other solid combustion by-products and also acts to reduce existing scale. This results in the maintenance of heat transfer rates for very much longer periods and improved plant performance than in the absence of the substance with consequent saving in fuel consumption and maintenance costs.
  • Finely divided iron is introduced into the combustion chamber in any suitable manner, conveniently in the form of ferric oxide (Fe 2 0 3 ) or in some other form which converts to ferric oxide under the conditions in the combustion chamber.
  • the substance is preferably blown into or over the combustion zone repeatedly over short periods of time at intervals as desired, as a fine powder during combustion either in the combustion air or separately.
  • the quantity of ferric oxide required to achieve the desired effect is very small, depending on the quality and type of the fuel.
  • the substance may alternatively or additionally be added to the fuel itself and although the substance is described as being added during'combustion it will be appreciated that quantities can be added prior to combustion.
  • the substance may also be added continuously if desired and can be in the form of a powder, a suspension in a substantially inactive or combustible liquid, or in the form of small pellets.
  • the dosage rate of the substance is a minimum of 0.1134 Kg (0.25 lbs) to 0.4536 Kg (1 lb) per tonne of coal consumed, or the therm equivalent of oil, gas and other fossil fuels, a preferred range being 0.1134Kg to 0-4536 0.4536 Kg (11b).
  • the quantities of substance injected into the combustion chamber can be more easily controlled by first mixing the substance intimately with a neutral powder. This also aids dispersion of the substance throughout the chamber.
  • a diluent powder composed, for example, of bentonite, synthetically organically modified bentonite, dolomite or calcined dolomite or other finely divided diluent powder which is inactive i.e. does not adversely affect the process of the present invention may be used.
  • the overall effect therefore, is a cleaner combustion chamber, flue passes and chimneys resulting in the maintenance of the boiler at higher efficiency and performance for long periods with consequently lowered fuel costs, a significant reduction in the cost of maintenance and cleaning and reduction in smut emission due to entrainment.
  • oxide means one or more of the following: a suboxide, oxide of known valency, super-oxide, peroxide, hydroxide, hydrated oxide or carbonate.
  • a mixture of iron oxide (Fe 2 0 3 ) as 30% by weight in an inactive finely divided naturally occurring clay powder was injected into the combustion chamber of a Colifax Hot Water boiler in the proportion of 0.227 Kg (0.5 lbs) weight of the mixture to each tonne of coal consumed.
  • the powder was injected every 3 hours for the requisite period to achieve the above dose rate.
  • the boiler efficiency as measured by flue gas analysis and temperature method improved from 65% to 71% over a period of 6 days and was associated with the removal of substantially all the adherent scale.
  • the reduction in the carbonacous content of the boiler flue passes was some 50% as measured in before and after conditions.
  • Example 1 A mixture of iron oxide (Fe 2 0 3 ) as 25% by weight in an inactive powder was injected as for Example 1 into the combustion chambers of three Centrax coal-fired boilers over a period of 6 months.
  • the boilers became free from adherent scale within the first 3 to 4 weeks and the flue deposits become,substantially free from soot and greasy smut which made them extremely free flowing and easily removed.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Glass Compositions (AREA)
  • Combustion Of Fluid Fuel (AREA)
  • Macromolecular Compounds Obtained By Forming Nitrogen-Containing Linkages In General (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Incineration Of Waste (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Rear-View Mirror Devices That Are Mounted On The Exterior Of The Vehicle (AREA)
EP84304239A 1983-06-22 1984-06-22 Verbesserung in bezug auf die Verbrennung Expired EP0130065B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84304239T ATE38852T1 (de) 1983-06-22 1984-06-22 Verbesserung in bezug auf die verbrennung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB838316937A GB8316937D0 (en) 1983-06-22 1983-06-22 Combustion processes
GB8316937 1983-06-22

Publications (2)

Publication Number Publication Date
EP0130065A1 true EP0130065A1 (de) 1985-01-02
EP0130065B1 EP0130065B1 (de) 1988-11-23

Family

ID=10544613

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84304239A Expired EP0130065B1 (de) 1983-06-22 1984-06-22 Verbesserung in bezug auf die Verbrennung

Country Status (7)

Country Link
EP (1) EP0130065B1 (de)
JP (1) JPS60501669A (de)
AT (1) ATE38852T1 (de)
AU (1) AU3741785A (de)
DE (1) DE3475320D1 (de)
GB (2) GB8316937D0 (de)
WO (1) WO1985000181A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101955818A (zh) * 2010-10-15 2011-01-26 鞠立梅 锅炉除焦清灰助燃剂

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3432365A1 (de) * 1984-09-03 1986-03-13 Deutsche Bp Ag, 2000 Hamburg Brennstoff auf basis von kohle
JPS6348392A (ja) * 1986-08-15 1988-03-01 Toa Netsuken Kk 石炭の排ガスダストのクリンカ−アツシユ抑制方法
JP2000090348A (ja) * 1998-09-09 2000-03-31 Honda Motor Co Ltd バッテリ充電装置及びバッテリ返却装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1335462A (en) * 1972-01-12 1973-10-31 Vp Chemicals Ltd Method of cleaning and or maintaining the cleanliness of heating surfaces in a fuel-fired heating appliance
DE2361091A1 (de) * 1973-08-28 1975-03-27 Geb Baykam Mueyesser Goerguen Rauchlose briketts aus kohlenstaub
US4191115A (en) * 1978-06-23 1980-03-04 The United States Of America As Represented By The United States Department Of Energy Carbonaceous fuel combustion with improved desulfurization
FR2510237A1 (fr) * 1981-07-22 1983-01-28 Steinmueller Gmbh L & C Procede pour incorporer un additif a un courant de gaz de reaction

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB490064A (en) * 1936-02-18 1938-08-09 Jean Benjamin Toustou Process for improving solid carbonaceous fuels
GB469241A (en) * 1936-04-29 1937-07-21 Katalik Ltd Catalytic composition for improving the combustion of solid fuels
CH281765A (de) * 1950-03-28 1952-03-31 Tech Studien Ag Verfahren zur Verminderung von Zerstörungen an hitzebeständigen Metallteilen bei hohen Temperaturen durch Verbrennungsprodukte.
GB743472A (en) * 1951-03-01 1956-01-18 Power Jets Res & Dev Ltd Improvements in or relating to fuel oils and the combustion of fuel oils
GB858942A (en) * 1957-02-04 1961-01-18 Nat Cylinder Gas Co Method of inhibiting slag formation in boilers and inhibitor materials for use therein
GB858096A (en) * 1957-09-27 1961-01-04 Amber Chemical Company Ltd Improvements relating to the reduction of the corrosive attack of gases of combustion on metal
GB1189356A (en) * 1967-07-13 1970-04-22 Apollo Chem Improvements in or relating to Fuel Compositions
GB1164856A (en) * 1967-09-19 1969-09-24 Apollo Chem Improvements in or relating to Fuel Compositions
GB1204177A (en) * 1967-10-10 1970-09-03 Coal Industry Patents Ltd Process for the combustion of carbonaceous material
GB1435090A (en) * 1972-11-09 1976-05-12 Gen Electric Briquettes for coal gasification

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1335462A (en) * 1972-01-12 1973-10-31 Vp Chemicals Ltd Method of cleaning and or maintaining the cleanliness of heating surfaces in a fuel-fired heating appliance
DE2361091A1 (de) * 1973-08-28 1975-03-27 Geb Baykam Mueyesser Goerguen Rauchlose briketts aus kohlenstaub
US4191115A (en) * 1978-06-23 1980-03-04 The United States Of America As Represented By The United States Department Of Energy Carbonaceous fuel combustion with improved desulfurization
FR2510237A1 (fr) * 1981-07-22 1983-01-28 Steinmueller Gmbh L & C Procede pour incorporer un additif a un courant de gaz de reaction

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101955818A (zh) * 2010-10-15 2011-01-26 鞠立梅 锅炉除焦清灰助燃剂
CN101955818B (zh) * 2010-10-15 2013-01-02 鞠立梅 锅炉除焦清灰助燃剂

Also Published As

Publication number Publication date
GB8316937D0 (en) 1983-07-27
AU3741785A (en) 1985-01-25
JPS60501669A (ja) 1985-10-03
GB2142342A (en) 1985-01-16
DE3475320D1 (en) 1988-12-29
GB2142342B (en) 1988-01-27
WO1985000181A1 (en) 1985-01-17
GB8416184D0 (en) 1984-08-01
ATE38852T1 (de) 1988-12-15
EP0130065B1 (de) 1988-11-23

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