EP1971805A1 - Bruleur de chauffage - Google Patents
Bruleur de chauffageInfo
- Publication number
- EP1971805A1 EP1971805A1 EP06841098A EP06841098A EP1971805A1 EP 1971805 A1 EP1971805 A1 EP 1971805A1 EP 06841098 A EP06841098 A EP 06841098A EP 06841098 A EP06841098 A EP 06841098A EP 1971805 A1 EP1971805 A1 EP 1971805A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuel
- heating burner
- ignition
- heating
- interval
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
- F23N1/02—Regulating fuel supply conjointly with air supply
- F23N1/022—Regulating fuel supply conjointly with air supply using electronic means
-
- 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
- F23D11/04—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying action being obtained by centrifugal action
- F23D11/06—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying action being obtained by centrifugal action using a horizontal shaft
-
- 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, e.g. burner cooling means, noise reduction means
- F23D11/44—Preheating devices; Vaporising 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
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2227/00—Ignition or checking
- F23N2227/22—Pilot burners
Definitions
- the present invention relates to a heating burner for a heating system.
- Heating burners are used for a variety of applications. They are used to heat buildings, surfaces and liquids, whether for everyday use or, for example, for a swimming pool. Even though the requirements that arise in the individual application areas sometimes differ greatly, a requirement for the burner is common to all application scenarios. It is important to set a certain required temperature in the system to be heated at all times, whereby the temperature can vary greatly over time, the reaction time of the
- the heating burners have an input that determines the desired setpoint temperature and at least one sensor that determines the actual temperature in the system.
- Internal control methods try the heating burner or its combustion flame to control so that the actual temperature as closely as possible corresponds to the target temperature.
- the reaction time of the entire heating system is relatively slow, the setpoint requirements are constantly changing and efficient and maintenance-free heating is required.
- a high efficiency of the heating burner and a low-emission and soot-free burning of the fuel used in each case is required in the commercial heating burners.
- the modulating procedure In intermittent control, an area is set around the desired setpoint temperature. During combustion, the heating burner knows only two congestion. In a burning status, unregulated fuel is burned and heat energy is produced. In a switched-off state, no fuel is burned, additional heat energy is not passed on to the heating system. If the actual value falls below the lower interval limit of the setpoint, the heating burner is ignited and burns until the actual value exceeds the upper limit of the interval. The burner is then switched off again and remains in this state until the actual value specifies that a renewed ignition is necessary. An actual temperature curve, as is usually the case with a heating burner with an intermittent process, can be seen from FIG. 4a.
- the intermingling method has the disadvantage that in order to ensure low-emission combustion and the calorific value of the fuel optimally exploiting combustion, the interval length is chosen to be relatively generous and, in addition, because of the possibly long reaction time hysteresis occurs. Therefore, there is a strong over- and under-regulation that affects the quality and efficiency of the system. On the one hand, only the heat energy that is really desired is rarely delivered; on the other hand, the excessive overriding of the actual power increases the heat loss in the piping systems and leads to wear (eg calcification).
- the modulating process regulates the heating power in the same way as the actual value of the temperature in the system.
- the fuel supply can be regulated within the scope of a control range.
- the control range is finite, if the control range is exceeded or not reached, the intermittent procedure must be changed. The disadvantages mentioned in this method occur in the same way, if not even stronger.
- control variables for example, air supply and fuel supply
- a heating burner for a heating system with a control device, with at least one primary sensor for detecting a heating power of the heating burner and with actuators having an ignition device for igniting fuel, an air conveying device for conveying combustion air and a fuel delivery device for conveying fuel to the ignition device, wherein the delivery rate of the fuel delivery device is substantially freely adjustable and the control device adjusts the actuators such that the fuel is ignited in periodically recurring ignition intervals and burns for an adjustable combustion interval, wherein the heating power by the control device over the length of the firing interval in respective ignition interval is adjustable.
- the central idea of the invention is therefore that the control device ignites the fuel at regular intervals and operates a combustion flame at a predefined power.
- the heating power produced by the heating burner is only regulated by the respective burning time, ie the adjustable burning interval.
- the control device only has to differentiate between three phases within a combustion interval, an initialization phase in which the combustion power is increased to a pre-defined value, a constant combustion phase in which the combustion power is kept at a constant value, and a stop phase, in which the burning power is reduced back to almost zero.
- the control device can thus be designed so that they for these three phases
- actuators so optimally that an efficient burning of the fuel is ensured.
- the control device of the actuators is particularly the regulation of the fuel-air ratio decide, therefore, according to the invention, at least the flow rate of the fuel conveyor freely adjustable.
- the ignition intervals are less than or equal to 60 seconds.
- a fast reaction of the heating burner is thus ensured and the actual output of the heating burner adapts optimally to the target power. An overshoot and undershoot the heating power can be avoided.
- the fuel is a liquid fuel, especially rapeseed oil or other natural oils.
- the actuators comprise a motor which sets a truncated cone in rotational movements about its longitudinal axis such that fuel introduced into the truncated cone via an inlet opening escapes at an outlet opening due to the centrifugal force and is atomized.
- the truncated cone is thus a cylindrically shaped tube through which at the inlet opening, where the tube has the smaller diameter, fuel is introduced, which is driven due to the rotation in the direction of the outlet opening. If the truncated cone is driven fast enough, the fuel emerging at the outlet opening is atomized due to the centrifugal forces acting on it. Long-chain liquid fuels crack the molecular chains.
- the ignition device comprises a heat return, which is made of tageleitfä- higem material and emits heat occurring in a combustion of the fuel to inflowing fuel.
- the heat recovery may be, for example, a rod, an internally-powered, motor-driven impeller, or other construction suitable for dissipating some of the heat generated during the combustion of the fuel. This derivation takes place in the direction of a fuel supply line.
- the inflowing fuel can be heated to just below the ignition temperature without the provision of additional preheaters.
- this heat recovery is at least partially arranged in the interior of the above-described hollow cylinder, the outlet opening towering.
- the heat generated at the outlet opening of the truncated cone is transported away in the direction of the inlet opening of the truncated cone.
- the fuel can be preheated to temperatures above the ignition point. Only at the exit from the truncated cone through the outlet opening it comes to the inflammation.
- the ignition device preferably comprises a preheating, which heats the fuel to ignition temperature. Since there is not enough burning power outside the firing interval to sufficiently preheat the inflowing fuel in the initialization interval, it is helpful to provide external preheating. Preheating can be ohmic or inductive. It is crucial that the preheating is controllable by the control device and is regulated according to the phases.
- the preheating comprises a heating coil which surrounds the truncated cone.
- the fuel is heated indirectly via the truncated cone.
- the control device is designed such that it controls the fuel delivery device and the air conveyor so that during the firing interval, preferably in an initialization and initialization phase and a stop interval or stop phase, there is a substantially constant air-fuel ratio at the ignition device.
- the air-fuel ratio can be chosen so that the most efficient, especially soot-free combustion of the fuel is ensured. Because of this type of intelligent control device, the heating burner rarely needs servicing and ensures efficient fuel utilization despite the frequent relight.
- the heating burner has an air flow sensor for determining the delivery rate of the air delivery device.
- the control device can thus not only control the air required for igniting and burning the fuel according to a preset mode, but also regulate it as needed.
- air flow sensors various temperature sensors for both fuel and air as well as flow sensors for the flow rate of the fuel can be provided.
- the control device adjusts the actuators, in particular the fuel pump or conveying device and the air conveying device, in such a way that outside the firing interval a pilot flame is present. A reignition of the fuel is thus not necessary and a sufficiently powerful device for this need not be provided.
- the pilot flame may also serve to provide heat for preheating fuel and thus ensure efficient burning of the fuel throughout the ignition interval.
- control device is designed such that, in order to supply the pilot flame, it controls the fuel pump outside the firing interval so that less than one percent, preferably less than one per thousand, of the maximum delivery rate of the fuel pump is conveyed.
- FIG. 1a is a block diagram of a control device of a heating burner according to the invention with associated actuators and sensors;
- FIG. 2 shows the functional arrangement of the individual components of a heating burner according to the invention
- FIG. 3 shows the structure of a heating burner according to the invention
- FIG. 4a shows a time-temperature diagram of a heating burner with intermittent control
- FIG. 4b shows a time-temperature diagram of a heating burner according to the invention
- - Figut 5a the burning power of a heating burner according to the invention over several ignition intervals
- FIG. 5b shows the burning power of a heating burner according to the invention over a first ignition interval
- a heating burner according to the invention may comprise the components shown in FIG. 1a.
- a central unit of the Schubtenners forms the control device 10. This is connected to a plurality of actuators, in the present example an ignition device 50, an atomizer 70, an air conveyor 80, a fuel conveyor 20, a cracking device 30 and a preheater 40.
- the control device 10 of the heating burner controls or controls the respective actuators such that an efficient burning, ignition and down rules or deletion of the fuel is ensured. Efficient in this case means that the calorific value of the fuel is utilized optimally while a low-pollution and soot-free combustion is ensured, so that maintenance of the heating burner according to the invention is rarely necessary.
- the control device 10 receives signals from a plurality of sensors 60. These sensors 60 comprise at least one primary sensor, by means of which the control device can determine an actual temperature of the system to be heated.
- this primary sensor is a heating water temperature sensor 65, which determines the temperature of a heated by the heating burner heat cycle.
- the control device is designed such that it can determine a difference between the actual temperature and a setpoint temperature and regulates the actuators in such a way that this difference is as small as possible at any point in time. Since the heating burner according to the invention has a very low number of states, namely the ignition of fuel, the burning of fuel, the extinction of the combustion flame or the reduction of the combustion flame and an idle without combustion flame or with a reduced combustion flame, a preconfiguration of the control device 10 is conceivable. This preconfiguration determines, for each of the states mentioned, optimal parameters for controlling the actuators. In the embodiment illustrated in FIGS.
- the sensors 60 additionally include an air temperature sensor 61, an air flow sensor 62, a fuel temperature sensor 63, and a fuel flow sensor 64.
- the fuel flow sensor 64 and the air flow sensor 62 provide signals to the controller 10 that allow it To draw conclusions about the performance of the fuel conveyor 20 and the air conveyor 80.
- the air temperature sensor 61 and the fuel temperature sensor 63 help the controller 10 to control the preheater 40 so that optimum combustion of the fuel occurs.
- a combustion chamber 1 comprises, as shown schematically in FIG. 2, two supply lines.
- the fuel to be combusted is rapeseed oil.
- the fuel is stored in a fuel tank 24 and conveyed via the fuel line 21 by means of a fuel delivery device 20 to the combustion chamber 1.
- the crude oil passes through a preheater 40, which heats the fuel for easier ignition, and a cracker 30, which processes the fuel.
- Another functional unit, an atomizer 70 is provided directly on the combustion chamber 1 and mixes the
- An ignition device 50 ensures the ignition of the air fuel mixture in the combustion chamber. 1
- FIG. 3 shows the structure of the embodiment shown schematically in FIG. 2 of the heating burner according to the invention.
- the air line 81 is in the form of a generously sized tube. At a point of the air pipe 81, the fuel pipe 21 passes through the outer wall of the air pipe 81 and continues inside the same. The fuel line 21 and the air line 81 are still separated from each other.
- a first opening of the fuel line 21 opens into the fuel tank 24 from which the fuel is conveyed to a second opening of the fuel line 21.
- This second opening closes in the interior of the air line 81 airtight with an inlet opening 35 of a truncated cone 32 from.
- the truncated cone is driven by a motor 37, not shown, such that the fuel entering via the inlet opening 35 is conveyed inside the hollow truncated cone 32 due to the centrifugal force to an outlet opening 36 which opposes the inlet opening 35, but due to the shape of the Truncated cone 32 has a larger diameter.
- the crude oil introduced into the truncated cone 32 is mechanically cracked at a spoiler edge along the outlet opening 36 as well as mixed with the air surrounding the truncated cone 42 via the air line 81.
- the motor 37 and the truncated cone 32 thus form the functional units of the atomizer 70 and the cracking device 30 of FIG. 1a.
- the truncated cone 32 is loosely surrounded by a heating coil 44. This heats not only the surrounding the truncated cone air but also the truncated cone 32 itself. Since the truncated cone 32 is made of thermally conductive material, the heat energy of the heating coil 44 is passed on to the fuel inside the truncated cone 32.
- the heating coil 44 thus has a dual functionality and heats both air and fuel.
- the preheated fuel ignites as soon as it is mixed with the air.
- the resulting heat output is not only given off as heating power of the heating burner but to a small extent via a heat return 42, which extends in the form of a metal rod in the interior of the truncated cone, delivered to the inflowing fuel in the truncated cone 32.
- a fuel delivery device 20 and an air delivery device 80 are not shown in FIG. 3, but can be provided without problem on or in the fuel line 21 or the air line 81.
- the actuators are connected to the control device 10 and control the heating burner in accordance with the invention by controlling the combustion flame to a preset combustion output L at constant preset ignition intervals t z and maintaining it for the duration of the combustion interval t B (FIG. compare Figure 5a).
- the duration of the combustion interval t B is determined by the control device 10 as a function of the heating power to be provided by the heating burner.
- FIG. 5a shows a time
- Burning power graph Here are three ignition intervals t z shown.
- An ignition interval in the selected embodiment has the length of 100 seconds.
- the control unit thus regulates the burning power L to a preset level every 100 seconds. And keeps this higher burning power L during the firing interval t B.
- the actuators are controlled by the controller 10 so that the burning power L is virtually zero.
- the control device 10 determines that approximately 60% of the maximum power is required for optimum heating power in a second ignition interval t z . Accordingly, the firing interval t B in this second firing interval t z is about 60 seconds long.
- Figure 5b shows a time-burning power graph of the first firing interval t z in Figure 5a, the focal length of the interval t B is as mentioned 20 seconds.
- the start or stop phase that is to say the period in which the control device 10 up-regulates the firing power L to the preset high level or downshifts it, is referred to as initialization interval t, or stop interval t s .
- initialization interval t or stop interval t s .
- a constant combustion Substance oxygen ratio in these phases is particularly crucial.
- the controller 10 controls the actuators accordingly.
- FIG. 5 c A detailed view of the second ignition interval t z from FIG. 5 a can be taken from the time-burning diagram of FIG. 5 c.
- this precise control of the heating power can be an improved actual value setting, as shown in Figure 4b, achieve.
- the abscissa indicates the time and the ordinate the actual temperature.
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)
- Control Of Combustion (AREA)
Abstract
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006000620 | 2006-01-02 | ||
DE102006014633A DE102006014633B4 (de) | 2006-03-29 | 2006-03-29 | Heizbrenner |
PCT/EP2006/012407 WO2007076962A1 (fr) | 2006-01-02 | 2006-12-21 | Bruleur de chauffage |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1971805A1 true EP1971805A1 (fr) | 2008-09-24 |
EP1971805B1 EP1971805B1 (fr) | 2012-10-31 |
Family
ID=37834174
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06841098A Not-in-force EP1971805B1 (fr) | 2006-01-02 | 2006-12-21 | Bruleur de chauffage |
Country Status (3)
Country | Link |
---|---|
US (1) | US20080318173A1 (fr) |
EP (1) | EP1971805B1 (fr) |
WO (1) | WO2007076962A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11543126B2 (en) | 2019-04-08 | 2023-01-03 | Carrier Corporation | Method and apparatus for mitigating premix burner combustion tone |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3739812A (en) * | 1970-06-18 | 1973-06-19 | Robertshaw Controls Co | Fuel control system and control device therefor or the like |
US3771724A (en) * | 1972-07-19 | 1973-11-13 | Richards Of Rockford Inc | Apparatus and process for spraying liquids |
DE3524230A1 (de) * | 1985-07-06 | 1987-01-08 | Honeywell Bv | Einrichtung zur regelung der raumtemperatur |
KR910000677B1 (ko) * | 1985-07-15 | 1991-01-31 | 도오도오 기기 가부시기가이샤 | 가스 순간식 급탕기(給湯機) |
JPH03282116A (ja) * | 1990-03-30 | 1991-12-12 | Toto Ltd | 給湯機における燃焼制御方法 |
DE4215995C5 (de) * | 1992-05-12 | 2008-02-21 | Suntec Industries France, S.A. | Düsenstock für Öldruckzerstäubungsbrenner |
JP3282944B2 (ja) * | 1994-07-18 | 2002-05-20 | トヨタ自動車株式会社 | 低NOxバーナ |
GB9503065D0 (en) * | 1995-02-16 | 1995-04-05 | British Gas Plc | Apparatus for providing an air/fuel mixture to a fully premixed burner |
FR2764674B1 (fr) * | 1997-06-11 | 1999-07-16 | Gaz De France | Procede et dispositif associe de regulation de la temperature d'un fluide chauffe par un bruleur |
AU2003220021A1 (en) * | 2002-03-19 | 2004-07-09 | New Power Concepts Llc | Fuel injector for a liquid fuel burner |
DE10342763A1 (de) * | 2003-09-16 | 2005-07-07 | BSH Bosch und Siemens Hausgeräte GmbH | Gasbrenner für flüssigen Brennstoff |
-
2006
- 2006-12-21 US US12/159,239 patent/US20080318173A1/en not_active Abandoned
- 2006-12-21 WO PCT/EP2006/012407 patent/WO2007076962A1/fr active Application Filing
- 2006-12-21 EP EP06841098A patent/EP1971805B1/fr not_active Not-in-force
Non-Patent Citations (1)
Title |
---|
See references of WO2007076962A1 * |
Also Published As
Publication number | Publication date |
---|---|
US20080318173A1 (en) | 2008-12-25 |
WO2007076962A1 (fr) | 2007-07-12 |
EP1971805B1 (fr) | 2012-10-31 |
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