DE102007021927A1 - Oil gasification burner for ashless liquid fuel - Google Patents

Abstract

There is proposed an oil gasification burner for liquid fuel, comprising a centrally located pilot burner part (1), a concentric annular channel (2) for supplying the oxidant, a plurality outside the annular channel concentric with the burner axis arranged feed elements with Druckzerstäuberdüsen (5) for the introduction of liquid fuel (4) , The Druckzerstäuberdüsen are designed such that a fine atomization of the liquid fuel takes place before it comes into contact with the rotated oxidizing agent. Different liquid fuels can be supplied via the individual feed elements. By selecting the replaceable nozzle, the nozzle parameters can be adapted to the particular conditions (pressure difference, drop fineness, spray angle, etc.) of the respective liquid fuel.

Description

Of the The subject of the application relates to an oil gasification burner for liquid fuel, a method of operation an oil gasification burner for liquid fuel and method of putting an oil gasification burner into operation for liquid fuel.

The The invention relates to an oil gasification burner with Pressure atomizing nozzles for steam-oxygen gasification of ash-free liquid fuels under high pressure for example, 80 bar (8 MPa) and high temperatures of for example 1200 to 1900 degrees Celsius in ceramic lined reactors.

Known are oil burners with a pressure atomizing nozzle for the partial oxidation of liquid fuels with a cylindrical water-cooled housing and an internal liquid supply around the one coaxially arranged annulus for the supply the oxidizing agent is arranged. To start up this Burner serves a separate Aufheizbrenner, the first bring the masonry to temperature and ignited at the later of the oil burner becomes.

• 1. durch eine zentrale Flüssigkeitszuführung ist der Einsatz des Brenners auf einen einzigen Brennstoff festgelegt.
• 2. zu Inbetriebnahme des Brenners ist ein weiterer Brenner als Aufheizbrenner, der später ausgetauscht wird, notwendig.
• 3. die Inbetriebnahme des Ölbrenners erfolgt dabei grundsätzlich drucklos und unter oxidierender Atmosphäre und muss durch komplizierte Medienanpassungen zunächst langsam auf die reduzierende Reaktoratmosphäre überführt werden, bevor der eigentliche Vergasungsprozess beginnen kann.
• 4. sinkt nach dem Aufheizprozess die Mauerwerkstemperatur, durch Verzögerung bei der Ölbrennermontage, unter die vorgegebene Mauerwerkszündtemperatur, muss der gesamte Aufheizprozess wiederholt werden.

The known burner has the following disadvantages:

• 1. by a central liquid supply, the use of the burner is set to a single fuel.
• 2. to start-up of the burner is another burner as Aufheizbrenner, which is later replaced, necessary.
• 3. The commissioning of the oil burner takes place in principle without pressure and under oxidizing atmosphere and must be slowly transferred by complicated media adjustments initially to the reducing reactor atmosphere before the actual gasification process can begin.
• 4. If, after the heating process, the masonry temperature falls below the specified masonry ignition temperature due to a delay in the oil burner assembly, the entire heating process must be repeated.

Such typical solutions are shown in patent specifications no. DD 151020 such as DD 214911 ,

task the invention is the creation of an oil burner with Druckzerstäuberdüsen, under the conditions of vapor-oxygen gasification of liquid, Ashless fuels work reliably under pressure. By constructive measures, an oil burner be formed with Druckzerstäuberdüsen, the the mentioned disadvantages in the pressure gasification of liquid, Ashless fuels, compensated and safe operation ensured with uniform flame training.

The Task is in a generic subject solved by the features of claims 1, 7 and 8.

advantageous Further developments of the subject of the application are specified in the subclaims.

Of the Subject of the application is hereinafter as an exemplary embodiment to an extent necessary for the understanding of Figures explained in more detail. Showing:

1 a cross section through an oil gasification burner according to the invention and

2 a longitudinal section through an oil gasification burner according to the invention.

In the same designations denote the same elements.

The oil burner according to the invention with Druckzerstäuberdüsen has a pilot burner arranged in the center 1 , which is equipped with a fuel gas and Oxydationsmittelzuführung, a flame monitor and a high-voltage electrical ignition, on.

Around this assembly is an annulus 2 arranged to supply the oxidizing agent for the actual oil burner. At the annular outlet opening of the oxidant are swirl blades 3 provided for swirling the oxygen flow.

Both assemblies (pilot burner part and oxidant supply) are in another assembly, the burner holder 6 integrated. The entire burner holder assembly is implemented with a coiled tubing water cooling system to dissipate the heat applied to this assembly. In addition, the assemblies arranged in the center of the burner holder, pilot burner part and the further oxidant supply, are also equipped with separate water cooling systems.

The supply of liquid fuel is inventively provided so that between the housing wall of the burner holder and the central Oxydationsmittelzufuhr several (n = 2, 3, ...) straight fuel supply elements 4 are located. The feed elements are arranged concentrically around the central axis of the burner with the same angular offset. At the in 1 illustrated embodiment with three dust-feeding elements, they are concentric about the central axis of the Brenners arranged with an angular offset of 120 degrees. The feed elements are embodied in a straight line, essentially parallel to the central axis of the burner, and terminate at the burner mouth in addition to the oxidant outlet in the form of an oil pressure atomizing nozzle 5 ,

By the special design of the pressure atomizing nozzle a fine atomization of the liquid fuel takes place before it comes in contact with the oxidizing agent. The special pressure atomizer nozzle is connected to the feed pipe over connected a screw, so that replaced if necessary, the nozzle can be. This can be done by selecting the nozzle, the nozzle parameters to the particular conditions (pressure difference, Drop fineness, spray angle, etc.) of the liquid fuel be adjusted.

By the introduction of the liquid fuel in individual tubes with a corresponding nozzle can simultaneously over the individual feeders different liquid fuels fed and reacted in a flame reaction.

By the execution of the oxidant supply with Swirl blades, the exiting oxygen flow is strongly in rotation offset in, that over the feeder elements exiting finely atomized liquid jets, be sucked in.

At the Outlet of the media, the individual streams mix to a single rotating liquid-oxygen stream. This will result in a uniform flame formation and stabilization achieved.

simultaneously can by a different employment of the swirl blades the Flame formation influenced in its width and length become.

The Commissioning of the oil burner with pressure atomizing nozzles takes place by means of the integrated pilot burner under reducing Conditions and operating pressure of the reactor plant. The ignition of the Pilot burner at light reactor pressure (2-5 bar) and also under reducing reaction space conditions.

The invention includes an atomized spray oil burner for the gasification of liquid ashless fuels at high pressures of, for example, 80 bar (8 MPa) and high temperatures of, for example, 1200 to 1900 degrees Celsius in ceramic lined reactors for oxygen gasification, comprising a cooled housing ( 6 ) for receiving a centrally located pilot burner ( 1 ) for commissioning the oil burner unit with a gas and oxidant supply and an integrated flame monitoring and high-voltage ignition, one around this pilot burner ( 1 ) arranged annular channel ( 2 ) for the supply of the oxidizing agent and straight feed elements for the introduction of liquid fuel ( 4 ), characterized in that a plurality of feed elements ( 4 ) and these feed elements ( 4 ) in itself and at the outlet immediately adjacent to the annular channel for oxidant supply ( 2 ) with a nozzle ( 5 ), at the exit swirling devices ( 3 ) which contain the oxidant stream ( 2 ) in strong rotational movement and thus allow the design of influencing the flame geometry.

In a further embodiment, a plurality of feed elements ( 4 / 5 ) are arranged, via which different liquid fuels can be introduced, which end in a common flame and their commissioning by means of a built-in center pilot burner ( 1 ) under reducing conditions and under reactor operating pressure.

In a further embodiment, the invention comprises a method in which the pilot burner integrated in the center of the burner unit (FIG. 1 ) is ignited under reducing reactor atmosphere and at slightly elevated system pressure and then raised with increasing the performance of the pilot burner, the reaction space pressure to the necessary to ignite the oil burner operating pressure.

1

pilot burner with gas and oxygen supply and integrated flame monitoring and high voltage ignition device

2

Oxydationsmittelzuführung for the liquid fuel

3

swirl blades for turbulence of the oxidizing agent

4

feed pipe for liquid fuel

5

pressure atomizer

6

water-cooled torch holder

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DD 151020 [0005]
• - DD 214911 [0005]

Claims (8)

Oil gasification burner for liquid fuel, comprising a centrally arranged pilot burner part ( 1 ), a concentric annular channel ( 2 ) for supplying the oxidizing agent, a plurality of outside the annular channel concentric with the burner axis arranged feed elements for the introduction of liquid fuel ( 4 ), characterized in that • in the burner, the individual feed elements are running in itself, • the individual feed elements are aligned substantially parallel to the burner axis, • at the individual feed elements on the Brennermund side facing each a Druckzerstäuberdüse is attached and • the individual feed elements at Brennermund end near the Oxydationsmittelaustritt. Oil gasification burner for liquid fuel according to Claim 1, characterized in that a Druckzerstäuberdüse about a screw attached to the feed element is. Oil gasification burner for liquid fuel according to one of the preceding claims characterized the pressure atomizing nozzle is designed in this way is that a fine atomization of the liquid fuel before it comes into contact with the oxidizing agent comes. Oil gasification burner for liquid fuel according to one of the preceding claims, characterized in that the annular channel ( 2 ) is running from the burner inlet to the burner mouth is tapered. Oil gasification burner for liquid fuel according to one of the preceding claims, characterized in that the annular channel ( 2 ) Swirling devices ( 3 ) for a displacement of the oxidant stream in strong rotational motion. Oil gasification burner for liquid fuel according to one of the preceding claims characterized that on the individual feed elements different Liquid fuels are fed. Method of operating an oil gasification burner for liquid fuel according to one of the preceding Claims 1 to 6, characterized in that over the individual feed elements different liquid fuels be supplied. Procedure for commissioning an oil gasification burner for liquid fuel according to one of the preceding Claims 1 to 7, wherein in the center of the burner unit integrated pilot burner under reducing reactor atmosphere and ignited at slightly elevated system pressure and then under increase in performance of the pilot burner, the reaction space pressure on the necessary to ignite the oil burner Operating pressure is raised.