EP1898151A2 - Ölbrenner für Boiler und ähnliches - Google Patents

Ölbrenner für Boiler und ähnliches Download PDF

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Publication number
EP1898151A2
EP1898151A2 EP07015341A EP07015341A EP1898151A2 EP 1898151 A2 EP1898151 A2 EP 1898151A2 EP 07015341 A EP07015341 A EP 07015341A EP 07015341 A EP07015341 A EP 07015341A EP 1898151 A2 EP1898151 A2 EP 1898151A2
Authority
EP
European Patent Office
Prior art keywords
oil
delivery
oil burner
burner
ventilation pipe
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Withdrawn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
EP07015341A
Other languages
English (en)
French (fr)
Other versions
EP1898151A3 (de
Inventor
Albertina Bianco
Pierangelo Corino
Lucio Pavin
Massimo Sangiacomo
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.)
AR-CO Bruciatori Srl
Original Assignee
AR-CO Bruciatori Srl
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 AR-CO Bruciatori Srl filed Critical AR-CO Bruciatori Srl
Publication of EP1898151A2 publication Critical patent/EP1898151A2/de
Publication of EP1898151A3 publication Critical patent/EP1898151A3/de
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/10—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour
    • F23D11/106—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour medium and fuel meeting at the burner outlet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/36—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/36—Details
    • F23D11/44—Preheating devices; Vaporising devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K5/00—Feeding or distributing other fuel to combustion apparatus
    • F23K5/02—Liquid fuel
    • F23K5/08—Preparation of fuel
    • F23K5/10—Mixing with other fluids
    • F23K5/12—Preparing emulsions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K5/00—Feeding or distributing other fuel to combustion apparatus
    • F23K5/02—Liquid fuel
    • F23K5/14—Details thereof
    • F23K5/18—Cleaning or purging devices, e.g. filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K5/00—Feeding or distributing other fuel to combustion apparatus
    • F23K5/02—Liquid fuel
    • F23K5/14—Details thereof
    • F23K5/20—Preheating devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C2900/00—Special features of, or arrangements for combustion apparatus using fluid fuels or solid fuels suspended in air; Combustion processes therefor
    • F23C2900/99009—Combustion process using vegetable derived fuels, e.g. from rapes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K2300/00—Pretreatment and supply of liquid fuel
    • F23K2300/20—Supply line arrangements
    • F23K2300/203—Purging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K2900/00—Special features of, or arrangements for fuel supplies
    • F23K2900/05084—Creating a combustible foam of liquid fuels and air

Definitions

  • the present invention relates to an oil burner for boilers, heat generators, and the like.
  • oil is fed to a nozzle under a relatively high pressure, e.g., 4 or 5 bar, from a pump which is operatively connected to a motor which also drives a fan deliverying the combustion air.
  • a relatively high pressure e.g. 4 or 5 bar
  • the above burners are not even compatible with vegetable oils (e.g., colza oil) and other relatively coarse oils, such as exhausted oils collected in machine shops, garages, and the like, because these oils contain high percentages of residuals and potentially abrasive pollutants which could damage the internal mechanical components of the burner in a short time, mainly in consideration of the high operative pressure of the oil.
  • vegetable oils e.g., colza oil
  • other relatively coarse oils such as exhausted oils collected in machine shops, garages, and the like
  • an oil burner having a high reliability and sturdiness, which is capable of operating effectively, with an optimum combustion, even with oils having a high viscosity as well as with potentially abrasive coarse oils, such as vegetable oils, collected exhausted oils, and the like.
  • an oil burner 2 comprises a fan 4 of a conventional type, which is driven by a motor 6 and is provided with a ventilation pipe 8 deliverying an air stream.
  • Fan 4 integrally bears a compressor/mixer 10, which is also operated by motor 6, as will be better described below.
  • Compressor/mixer 10 comprises a housing 12 having a cylindrical cavity 14 (Fig. 2) leading to a first threaded opening 16 that is open to the outside.
  • a filter is received within cylindrical cavity 14, and consists of a perforated hollow cylinder 18 projecting coaxially from a threaded cylindrical base 20 which is screwed to first opening 16.
  • Hollow cavity 14 is open laterally for receiving oil from an oil intake 22 (Fig. 1), whereby the oil from intake 22 is filtered via the lateral wall of filter 18.
  • Cylindrical cavity 14 is in communication with a heating chamber 24 provided with a drain cock 25.
  • a heater 26 is arranged, which has a substatially cylindrical profile and is placed coaxially in front of filter 18, as well as a thermostat 28 above the heater. Heater 26 and thermostat 28 are respectively inserted through a second threaded opening 30 and a third threaded opening 32 which are bored in housing 12 on the opposite side with respect to first opening 16.
  • Heater 26 comprises a tubular resistor 26a projecting coaxially from a threaded base 34 that is screwed to second opening.
  • Thermostat 28 comprises a cylindrical temperature sensor 28a projecting coaxially from a threaded base 36 that is screwed to third opening 32.
  • Heating chamber 24 is open to receive returned oil from a oil return mouth 37 via a return passage 38.
  • a cylindrical seat 39 is formed with its axis lying parallel and eccentric with respect to the axis of motor 6.
  • Cylindrical seat 39 is internally lined with a liner 40 and houses a rotor 42 which is also operatively connected to motor 6 of fan 4.
  • rotor 42 has four equally-spaced rectilinear cuts such as 44, in which respective vanes such as 46 are slidably received. The vanes are biased to slide against liner 40 while the rotor swivels, by effect of the centrifugal force.
  • Vanes 46 separate the gap between rotor 42 and liner 40 into four sunction/compression chambers; the volume of each of these chambers rises in a first part of the rotation (counterclockwise rotation in the Figures) and then decreases in a second part.
  • Cylindrical seat 39 has a sunction port 50 near the narrowest section of the gap between liner 40 and rotor 42, on the side where the volume progressively rises.
  • Sunction port 50 is connected to a sunction duit 52 which terminates with two branches respectively leading to an air intake 54 connected to the ventilation pipe 8 via an air-feeding pipe 58, and to an oil intake 56.
  • Cylindrical seat 39 has a delivery port 60 near the narrowest section of the gap between liner 40 and rotor 42, on the side where the volume progressively decreases.
  • Delivery port 60 is connected to a delivery duit 62 leading to a delivery mouth 64.
  • delivery duit 62 is connected to an end of a mixture-deliverying pipe 68 (only diagrammatically shown in Fig. 1), which is coaxially arranged within ventilation pipe 8 and is provided with a nozzle 70 at its opposite end near the outlet end of ventilation pipe 8.
  • heating chamber 24 has a lateral oil outlet 72, with a pipe 74 connected thereto which feeds a positive-displacement pump 76 of a type known per se, whose flow rate is adjustable via a knob 78.
  • the outlet of positive-displacement pump 76 is connected to a magnetic valve 79 via a further pipe 80.
  • a first branch of valve 79 is connected to oil intake 56 via a union pipe 82, while a second branch of magnetic valve 79 is connected to oil return mouth 37 via a return pipe 84.
  • Valve 79 is selectively switchable to delivery oil from positive-displacement pump 76 either to the inlet of the sliding-vane mixer or to heating chamber 24.
  • a starting unit known per se (only diagrammatically shown in Fig. 1) is also received within ventilation tube 8 and comprises a plurality of electrodes 86 arranged around the mixture-deliverying pipe 68 and terminating with pointed ends bent towards nozzle 70.
  • the electrodes are connected to a transformer T to generate ignition sparks determining the ignition of the flame.
  • control unit UC also diagrammatically shown in Fig. 1 which is designed according to the normal knowledge of the person skilled in the art, therefore no further description will be given about it.
  • the compressor receives oil from lateral intake 22, e.g., by gravity from a tank arranged at a higher position, or by means of an auxiliary pump (not shown) which is also driven by motor 6.
  • the oil is filtered by filter 18 and then heated in chamber 24 by heater 26, which is controlled by thermostat 28.
  • Positive-displacement pump 76 which is adjusted via knob 78, draws oil from heating chamber 24 and sends it to magnetic valve 79.
  • a pre-washing operation is carried out in which magnetic valve 79 is switched to return the oil from pump 76 to heating chamber 24. Drain cock 25 allows water and any other pollutant within the heating chamber to be drained away.
  • magnetic valve 79 is switched to send oil to compressor/mixer 10, and symultaneously the starting unit is energized to generate sparks at the ends of electrodes 86.
  • the sliding-vane mixer emulsifies the oil coming from magnetic valve 79 via pipe 82 in the air coming from ventilation pipe 8.
  • the mixture obtained is conveyed to nozzle 70 via delivery pipe 66 and mixture-deliverying pipe 68 at a relatively low pressure (preferably in the range 1 to 1,2 bar).
  • the mixture delivered at the outlet end of pipe 68 is atomized by nozzle 70 and is mixed with the air stream generated by fan 4 via ventilation pipe.
  • the sparks generated by the starting unit determine the ignition of the flame.
  • the oil from the feeding circuit upstream which circuit is provided with filtering means, heating means, a positive-displacement pump and a magnetic valve, is pre-emulsified in the sliding-vane mixer, with a fraction of air drawn from the interior of the fan, thereby generating a homogeneous mixture which is suitable to become atomized at the nozzle even when high viscosity oils are used.
  • This circumstance makes it possible to obtain a perfect combustion of the mixture, with consequent advantages in terms of reduction of the consumptions and of the emission of pollutants, and makes the burner compatible with various types of both refined and coarse oils, such as naphtha, gas oil, vegetable oils (e.g., colza oil), collected exhausted oils, and the like.
  • the relatively low delivery pressure together with the compact, sturdy structure of the compressor/mixer, which incorporates all the components required to filter the oil and to heat it in a controlled way, makes the burner more reliable and less subject to wearing with respect to the known burners operating with higher pressures, particularly in relation to the use of oils containing high percentages of potentially abrasive residuals.
  • a nozzle 70 is used of the known type comprising a hollow, cylindrical main housing which is closed by a cap having a conical, perforated end and housing an atomizing nut provided with elicoidal grooves on its outer surface.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Nozzles (AREA)
  • Ventilation (AREA)
  • Feeding And Controlling Fuel (AREA)
EP07015341.6A 2006-09-05 2007-08-06 Ölbrenner für Boiler und ähnliches Withdrawn EP1898151A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000633A ITTO20060633A1 (it) 2006-09-05 2006-09-05 Bruciatore di oli per caldaie e simili

Publications (2)

Publication Number Publication Date
EP1898151A2 true EP1898151A2 (de) 2008-03-12
EP1898151A3 EP1898151A3 (de) 2014-01-01

Family

ID=38787045

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07015341.6A Withdrawn EP1898151A3 (de) 2006-09-05 2007-08-06 Ölbrenner für Boiler und ähnliches

Country Status (2)

Country Link
EP (1) EP1898151A3 (de)
IT (1) ITTO20060633A1 (de)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2022513A (en) * 1933-07-11 1935-11-26 Gen Electric Oil burning apparatus
US2724433A (en) * 1951-06-28 1955-11-22 Henney Motor Company Inc Oil burners of the low pressure type
US2753928A (en) * 1953-02-26 1956-07-10 Peter J Vanderlip Apparatus for conditioning fuel oil
GB751635A (en) * 1954-02-27 1956-07-04 Looser & Co A G E Apparatus for burning heavy fuel oils
GB849757A (en) * 1957-05-03 1960-09-28 Robert Von Linde Improvements in or relating to oil burner units
GB890949A (en) * 1960-09-30 1962-03-07 Armino Bianco Improvements in apparatus for supplying air-oil mixture to oil burners

Also Published As

Publication number Publication date
EP1898151A3 (de) 2014-01-01
ITTO20060633A1 (it) 2008-03-06

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