EP0211913A1 - Dispositif pour installation de chauffe. - Google Patents

Dispositif pour installation de chauffe.

Info

Publication number
EP0211913A1
EP0211913A1 EP86901371A EP86901371A EP0211913A1 EP 0211913 A1 EP0211913 A1 EP 0211913A1 EP 86901371 A EP86901371 A EP 86901371A EP 86901371 A EP86901371 A EP 86901371A EP 0211913 A1 EP0211913 A1 EP 0211913A1
Authority
EP
European Patent Office
Prior art keywords
blower
control
chimney
burner
air flow
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
EP86901371A
Other languages
German (de)
English (en)
Other versions
EP0211913B1 (fr
Inventor
Gert Basten
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.)
BASTEN, VERA
Original Assignee
HEFEL HERBERT
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 HEFEL HERBERT filed Critical HEFEL HERBERT
Publication of EP0211913A1 publication Critical patent/EP0211913A1/fr
Application granted granted Critical
Publication of EP0211913B1 publication Critical patent/EP0211913B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/18—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel
    • F23N5/184—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N3/00—Regulating air supply or draught
    • F23N3/02—Regulating draught by direct pressure operation of single valves or dampers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N3/00—Regulating air supply or draught
    • F23N3/08—Regulating air supply or draught by power-assisted systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/18—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel
    • F23N2005/181—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel using detectors sensitive to rate of flow of air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2233/00—Ventilators
    • F23N2233/06—Ventilators at the air intake
    • F23N2233/08—Ventilators at the air intake with variable speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/02—Air or combustion gas valves or dampers
    • F23N2235/06—Air or combustion gas valves or dampers at the air intake

Definitions

  • Furnace for a furnace Furnace for a furnace.
  • the invention relates to a device for a firing system for solid fuels or with a burner for liquid or gaseous fuels and an intake duct and at least one blower for supplying the combustion air and in the intake duct a cross-section variable control member is arranged and a flow meter with a a control device in operative connection and the fan has a controllable drive and the control device switches on the fan or changes its speed and / or actuates the control element in the sense of a cross-sectional change.
  • a heating boiler system with a gasification burner is known from German Offenlegungsschrift 31 25 512, in which the required and required burner output is determined from the outside air temperature and the boiler flow temperature. As a puncture of this burner output, the air mass flow and the heating oil mass flow are then controlled in a stoichiometric ratio, and deviations of the air mass flow from the setpoint are detected and regulated in the total air flow by means of an air mass flow sensor.
  • a valve is arranged between a compressor and the burner in the air supply line and divides the total air flow according to the corresponding control variables into a gasification air flow and a combustion air flow, both of which are fed to the burner in separate lines.
  • a device for pendulum-free power regulation in combustion plants is also known.
  • This consists of a temperature or pressure-controlled regulation of the angle division of a throttle valve in the supply system of the combustion air and a regulation of the fuel supply controlled by the air flow setting.
  • the throttle angle setting The flap is controlled by one or more temperature or pressure-controlled regulators and the downstream control of the fuel supply is controlled by the angular position of the throttle valve or a probe for measuring the combustion air flow in the supply system.
  • the control variables for the angle setting of the throttle valve pressure and / or temperature
  • Such chimney caps of the most varied types are generally used when there is a risk of excess pressure building up in the chimney due to the occurrence of falling winds, for example in mountainous regions or in the case of narrow buildings.
  • they can prevent backflow in various cases even with horizontal wind. This is the case if the boiler room is located in such a way that a negative pressure generated by the wind on the building walls can impress itself on it.
  • Firing systems with oil or gas burners in residential and residential construction are regulated so that when the burner is switched on, a constant amount of fuel per unit of time is always supplied, but the burner is operated intermittently. It is not possible with these burners to intervene in a regulating manner in the fuel supply line, except that it is opened or closed, that is to say the fuel flow has a free cross section in the switched-on state, and the line is completely blocked when the burner is switched off. Despite these unfavorable conditions to the rain optimal combustion, the aim of the invention is to counteract as far as possible the effects resulting from the chimney behavior described above, in order to achieve optimal combustion regardless of the external pressure and wind conditions in the combustion plant, i.e.
  • the previously known systems described at the outset do not suggest this measure, since they are based on fundamentally different control variables, namely control variables that result directly from the requested heating output (flow temperature of the heating system, outside temperature, pressure), whereas, according to the proposal according to the invention, the requested heating output is the controlled variable as such not directly and directly touched.
  • the measure according to the invention also offers the advantage that an intake duct with the organs and control elements required for regulation and control can be retrofitted as a compact structural unit to conventional and operating burners, since the proposed measures according to the invention do not interfere with condition the existing and existing burner system.
  • the large-scale use of the construction according to the invention is therefore suitable for contributing a considerable portion for the improvement of the air quality, which is complained about by everyone.
  • the drawing schematically illustrates the invention in connection with an oil burner.
  • the oil burner 1 is shown here with the oil supply line 2, the ignition transformer 3, the ignition electrode 4, the atomizer nozzle 5 and the burner fan 6.
  • An intake duct 9 having an enlarged inflow opening 8 leads to the burner 1.
  • the inflow opening 8 is expediently equipped with a grille or a flow straightener 17.
  • a cross-section of the intake duct which can be changed, is installed in the manner of an iris diaphragm and can be actuated with the aid of a motor 11.
  • a blower 16 is arranged in this intake duct 9 and can be driven by a controllable motor 7. It is expedient to design the blower 16 so that it can be driven in both directions of rotation, ie clockwise and counterclockwise.
  • a flow meter here designed as an impeller 12! This impeller 12 is loaded by a spiral spring and stands, for example, with a tap
  • Potentiometers 14 in direct connection.
  • This potentiometer with its central tap serves as a transmitter for a control device 15, which in turn is in operative connection with the drive motor 7 for the fan 16 and / or with the drive motor 11 for the diaphragm 10.
  • Other relevant devices can also be used as flow meters here, for example an impeller which is connected to a dynamically loaded dynamo, the voltage generated by the dynamo serving here as a disturbance variable and increasing with increasing speed.
  • the dynamo can be designed so that the terminal voltage of the dynamo increases linearly with its speed.
  • a freely flowable measuring nozzle would also be conceivable in connection with a differential pressure measurement in the inflow and outflow area of the nozzle, in which case the directly measurable differential pressure can be used as a disturbance or manipulated variable for the control loop.
  • a simple slide valve could also be used, but through this the flow conditions in the intake duct become extremely asymmetrical and very turbulent, which should be avoided in view of the optimization of the device as a whole. Flaps can also be used here.
  • the optimal air flow v o is determined by calculation and / or experiment when there is no wind.
  • This air flow v o flowing through the intake duct, the burner, the boiler and the chimney causes the impeller 12 to be rotated by a predetermined angle ⁇ o when the orifice 10 is set, which is referred to here as b o .
  • the combustion process runs optimally, that is, it shows its highest possible efficiency.
  • the control element 10 is in a middle position, the fan 16 is stationary. Under these conditions described above, the chimney has a pressure difference of
  • the speed of the fan 16 is also reduced by the control device 15.
  • the aperture 10 and the fan 16 can be subjected to such a control process either simultaneously, individually or in succession.
  • the weather-related disturbances can also cause the chimney draft to decrease, so the optimum air flow rate v o is reduced.
  • This also reduces the deflection of the wing Rades 12 and this decrease in angle now acts as a disturbance or control variable on the control circuit with the result that the fan 16 or its drive motor 7 is switched on or the speed of the running fan 16 is increased and / or the aperture b o is increased until the Air flow rate again reaches the value v o at which the pressure difference p o prevails on the combustion system and on the chimney
  • control loops Conventional devices are used for the design of the control loop, which are available to the relevant specialist in a wide range of designs without restricting the invention to a particular type of control; In addition to simple electrical control loops, electronic control loops can also be used. Modern electronics offer an abundance of circuits for such control loops.
  • the fan 6 in the oil burner 1 is used to atomize the from the
  • Nozzle 5 escaping oil and an additional blower 16 is provided in the intake duct 9 for regulating the air flow rate. If oil burners with controllable blowers 6 are offered by the trade, the gas blower 16 can be saved, the control device then acting directly on the drive motor of the blower 6 of the burner 1.
  • the device is expediently designed so that the fan 16 is at a standstill, with optimal air throughput v o
  • the speed is therefore zero and the fan 16 is only switched on when the air flow drops due to the reduction in the pressure difference at the chimney and / or when the required air flow can no longer be achieved by increasing the opening width at the diaphragm 10.
  • the device according to the invention can be used in combustion plants which are used in continuous operation but also in those which work intermittently.
  • the the latter way of working is the usual one, especially for domestic combustion systems.
  • the control and regulating circuit is then designed such that the chimney is ventilated for the time being when the burner is switched on. Oil is only injected into the combustion chamber and ignited after the ventilation process has been completed. From this point in time, the control device described then begins to operate as described above.
  • a flap can be provided in the intake duct 9, which opens the flow cross-section of the intake duct 9 when the burner is switched on, but which closes the intake duct as soon as the burner has switched off, in order to prevent cold air from the chimney when the burner is stopped and switched off flows through and cools it.
  • Such controlled flaps are known in oil and gas burners, for which reason this flap was not shown in the drawing.
  • the toxic exhaust gases carbon monoxide and hydrocarbons, as well as soot, which are produced when combustion is incomplete, do not occur and therefore cannot get into the atmosphere. This greatly reduces the environmental impact and makes a very significant contribution to air hygiene and thus to environmental protection.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Regulation And Control Of Combustion (AREA)

Abstract

Le brûleur (1) possède une tubulure d'aspiration (9) avec une soufflante (16) et un organe de régulation (10) faisant varier la section de la tubulure d'aspiration (9). Un appareil de mesure de l'écoulement (12) muni d'un capteur (14) mesure le courant d'air passant dans la tubulure d'aspiration (9). D'une part il est nécessaire d'amener une quantité d'air déterminé (vo) en vue d'une combustion optimale du combustible, et d'autre part le tirage naturel de la cheminée, qui détermine le débit d'air, est soumis à de fortes variations dues aux conditions climatiques, qui sont si importantes que dans des cas extrêmes, le sens de tirage de la cheminée va même jusqu'à s'inverser. Le capteur (14) est relié à un dispositif régulateur (15) qui, d'une part, agit sur l'organe (10) et/ou sur la commande (7) de la soufflante (16), de manière à pouvoir maintenir le débit d'air optimal indépendamment des influences atmosphériques. En fonction de celles-ci, et donc du tirage naturel de la cheminée, la section de passage de l'organe (10) est agrandie ou réduite par l'intermédiaire du dispositif régulateur (15), ou bien la soufflante (16) est branchée ou débranchée ou sa vitesse de rotation modifiée ou encore son orientation inversée.
EP86901371A 1985-02-07 1986-02-01 Dispositif pour installation de chauffe Expired - Lifetime EP0211913B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT357/85 1985-02-07
AT0035785A AT399767B (de) 1985-02-07 1985-02-07 Einrichtung zur eliminierung von atmosphärischen beeinflussungen auf das zugverhalten eines schornsteines

Publications (2)

Publication Number Publication Date
EP0211913A1 true EP0211913A1 (fr) 1987-03-04
EP0211913B1 EP0211913B1 (fr) 1990-05-09

Family

ID=3488463

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86901371A Expired - Lifetime EP0211913B1 (fr) 1985-02-07 1986-02-01 Dispositif pour installation de chauffe

Country Status (4)

Country Link
EP (1) EP0211913B1 (fr)
AT (1) AT399767B (fr)
DE (1) DE3671097D1 (fr)
WO (1) WO1986004663A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62190322A (ja) * 1986-02-18 1987-08-20 Rinnai Corp 燃焼制御装置
DE3817598A1 (de) * 1988-05-24 1989-11-30 Stahl Und Apparatebau Josef Sc Vorrichtung zum regeln der verbrennungsleistung eines feststoffheizkessels
DE4217150C2 (de) * 1992-05-23 1996-02-15 Webasto Thermosysteme Gmbh Motorunabhängig betreibbares Fahrzeugheizgerät
DE10114405B4 (de) * 2001-03-23 2011-03-24 Ebm-Papst Landshut Gmbh Gebläse für Verbrennungsluft
DE102009056140A1 (de) * 2009-11-27 2011-06-01 Robert Bosch Gmbh Verfahren zum Betreiben eines Gasbrenners und Gasbrenner
US10443840B2 (en) * 2011-05-12 2019-10-15 RM Manifold Group, Inc. Reversible draft controllers and exhaust systems incorporating same

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT166182B (de) * 1943-10-19 1950-06-26 Stig Karl Magnus Dipl Billman Vorrichtung zum Messen der Menge eines durch eine Leitung strömended Mittels
FR1177577A (fr) * 1956-06-28 1959-04-27 Kelvin & Hughes Ltd Réglage de l'écoulement de gaz
JPS5037923A (fr) * 1973-08-09 1975-04-09
US4232595A (en) * 1978-06-15 1980-11-11 Jefco Laboratories, Incorporated Exhaust system for smokestack
FR2492505A1 (fr) * 1980-10-20 1982-04-23 Exxon France Bruleur a regulateur d'air
FR2506899B1 (fr) * 1981-05-27 1987-07-03 Kempense Steenkolenmijnen Nv Dispositif pour le reglage automatique de l'admission d'air a un bruleur a charbon
DE3125513A1 (de) * 1981-06-29 1983-01-13 Siemens AG, 1000 Berlin und 8000 München "verfahren zum betrieb einer vergasungsbrenner/heinzkesselanlage"
JPS5828921A (ja) * 1981-08-12 1983-02-21 Toshiba Corp 炉圧の制御装置
FR2515314A1 (fr) * 1981-10-23 1983-04-29 Seccacier Procede et installation pour reguler le fonctionnement d'une chaudiere a gaz
DE3202425A1 (de) * 1982-01-26 1983-07-28 Ruhrkohle Ag, 4300 Essen Einrichtung zur pendelfreien leistungsregulierung von feuerungsanlagen
FR2545585B1 (fr) * 1983-05-05 1989-04-21 Laurent Francois Perfectionnements a des generateurs de chaleur fonctionnant au gaz et susceptibles d'etre raccordes a une aspiration controlee

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8604663A1 *

Also Published As

Publication number Publication date
AT399767B (de) 1995-07-25
DE3671097D1 (de) 1990-06-13
EP0211913B1 (fr) 1990-05-09
ATA35785A (de) 1993-04-15
WO1986004663A1 (fr) 1986-08-14

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