CZ142897A3 - Evaporation burner for a heater - Google Patents

Abstract

In an evaporation burner with a combustion chamber (1) for a heater or the like with a peripheral boundary wall (29), a front boundary wall (6) and an air-supply nozzle (8) projecting coaxially into the combustion chamber (1) with radial air outlets (9) through the nozzle wall, a guiding device (32) for a whirling air supply is fitted at or upstream of the air supply nozzle (8) of the combustion chamber (1), in which said air supply nozzle has a diaphragm (10) for an axial back-flow (R) of the exhaust gas or the air at the centre of turbulence of the whirling air supply (L). In an axial extension of the combustion chamber may be fitted a coaxial flame pipe (20), which together with the peripheral boundary wall (2), may constitute a one-piece (deep-drawn) sheet-metal component and the rest of the combustion chamber may be a cast component.

Description

Technical field

BACKGROUND OF THE INVENTION The invention relates to a heater or flue gas particle having a peripheral wall having a side outer sleeve for receiving the ignition device, a front wall having a central opening, an air inlet tube extending coaxially into the combustion chamber, and air outlets radially extending air intake.

BACKGROUND OF THE INVENTION

The prior art evaporation burners have combustion chambers which operate on the principle of supplying fuel to a wall or porous material from which the fuel evaporates and burns. Evaporation and combustion take place simultaneously, not separately. Combustion air is supplied to the combustion chamber either directly and is distributed throughout the combustion chamber, or is supplied radially through openings (in the outer jacket) or through a central air inlet pipe provided with openings, the cylindrical combustion chamber being at a certain distance from the outlet air inlet oven. A common feature of these combustion chambers is that they have a relatively low power density, that is, a relatively low output power relative to the volume of the combustion chamber.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a combustion burner of this kind, which can be used in many fields, which allows, compared to the prior art, intensive combustion of another kind, is particularly simple, compact in construction and rationally manufactured and assembled. The invention solves this object.

SUMMARY OF THE INVENTION

Evaporative burner with a combustion chamber for a heater or for thermal regeneration of a particulate trap filter having a peripheral wall having a lateral outer sleeve to accommodate the ignition device, with a front wall having a central opening, with an air intake tube extending coaxially into the combustion chamber, According to the invention, the cylindrical air inlet pipe of the combustion chamber is associated with an integrated spiral air intake manifold.

In particular, it is ensured that an integrated distribution device is assigned and in particular upstream of the cylindrical air supply tube to the combustion chamber, by means of which the combustion air is supplied to the cylindrical air supply tube by the swirling flow during operation of the burner. The swirling flow is a three-dimensional flow whose principal component runs tangentially in the area of the wall close to the cylindrical air inlet tube, the radial flow component being relatively weak and the axial flow component being relatively strong. Radial air outlets through the wall of the oven ensure that the high tangential velocity component changes direction, whilst the swirl is substantially dead, or the positive or negative residual spiral and accelerated, only the flow is introduced.

causes longitudinal cylindrical air to perform particularly well in the annular form and increases combustion efficiency. Radial

This space outlets may be provided as open slots or closed through holes in the wall of the air inlet tube, distributed along the wall periphery, optionally arranged at an oblique position, or with curved edges, to provide said positive or negative residual spiral flow.

Advantageously, a distributor device is provided for generating a spiral flow in the form of guide vanes which can be integrally formed, i.e. in one piece with the cylindrical air inlet pipe, the cylindrical air inlet pipe forming a single casting with the guide vanes.

In a preferred further embodiment of the invention, a coaxial fire tube is arranged downstream of the combustion chamber, which stabilizes the flame during operation and serves to remove hot combustion products.

A particularly advantageous solution of the burner from the manufacturing and assembly point of view is that the fire tube and the peripheral wall, i.e. the burner jacket, are one piece, in particular of deep-drawing sheet, the other parts of the combustion chamber being castings, preferably one casting.

The deep-drawing sheet and the casting may be welded together, or, for example, a flat gasket may be rigidly connected to each other to provide thermal decoupling. In this variant, the direct binding of the hot parts is interrupted.

The fuel is supplied to the annular space of the burner either by an annular channel in a frontal configuration relative to the muscular chamber shell, or alternatively via an external lateral nozzle in which the igniter, for example a glow plug or bulb is in different positions (obliquely, radially, tangentially to the combustion chamber axis. ).

Inside the combustion chamber shell, i.e. on the peripheral wall of the combustion chamber, there may be a porous lining to vaporize the supplied fuel.

The cylindrical air supply tube may be closed at the end in the flow direction or in another preferred embodiment open and provided with a shutter. During operation of the burner, the flue gas or air in the axial region of the burner or in the center of the swirling air supply in the axial direction flows back through the central orifice of the shutter, but is supplied to the annular space of the combustion chamber through radial air passages. This recirculated flue gas or air stream contributes at least once again to combustion (recirculation), thereby providing combustion with a low content of pollutants with little emission of pollutants. The diameter of the through hole or the diaphragm diameter is determined by trial.

It is recalled that in a closed system (for example, in heating) hot flue gas, or in an open system, fresh air can be fed back through the shutter.

When referring to an end in the direction of flow of a cylindrical air inlet pipe, it is meant exclusively the flow of combustion air inlet, not the axial backflow in the axial counter-direction. The same is true when defining the upstream end in the specification, in the description of the figures, and in the claims.

The invention makes it possible to design a burner which is very simple in construction, easy to manufacture and install, and very efficient to operate. The burner is particularly suitable for auxiliary heaters such as additional heating, booster heater, stove, camping stove, but also for so-called soot burners, vehicle preheating of the catalytic converter, fridge, field kitchen, house heating or fireboxes. The burner is a so-called blue burner with a flue gas return, which results in the combustion of the pollutant-poor. The burner is able to burn various substances. There is a slight load on the components, since a diffuse flame is produced in the annular space between the air tube and the peripheral wall of the combustion chamber. Since the flame is homogeneous, the burner can be operated with high efficiency even with a heat exchanger.

If the burner according to the invention can also be a coaxial flame arrester or coaxial flame screen after the air curtain of the cylindrical air supply tube, such devices may be dispensed with under certain requirements or provisions.

In the case of atmospheric burners or atmospheric blue burners, ambient air can be sucked in automatically during operation, and the shutter can also be designed as a jet cone or similar device (for example in a stove).

Suitably, a homogeneous flame pattern between the circumferential wall and the cylindrical air inlet tube is supported by supplying liquid fuel from the front over the entire circumference of the porous liner, which means that the supplied fuel can vaporize in the porous liner over the entire circumference of the shell into the annular space. (gasification zones). To achieve this, preferably in the case of a porous lining, an annular fuel channel is provided on the front side, which is formed as a distributor ring having a circular or angular cross-section with bevels which is inserted into the respective inner wall pocket in the region of the front wall. The annular channel preferably has an axial connection for the fuel supply line, which can be deflected radially outwardly from the connection region outside the annular channel, i.e. parallel to the front wall of the combustion chamber.

The distribution ring may have particularly uniformly distributed axial holes around the circumference, and preferably the number of axial holes may be equal to the number of radial air outlets, which are preferably uniformly distributed around the circumference of the air supply tube.

A transition ring may be arranged between the face of the porous liner, of sintered metal or the like, around the annular channel to compensate for manufacturing tolerances, for example a triton ring which is particularly absorbent and adaptable.

The combustion air is thus supplied to the central tube of the chamber by a supply coil. The orifice and combustion slots also open radial air, the component diverted by the device in the air distributor extending into the oven is provided with a radial shutter, which can be closed or closed. The combustion air enters through the slots into the annular combustion chamber. Combustion fed in three directions, has a large tangential on the radial slots, the oven with slits is destroyed as a spiral flow destroyer), peeled off and rectified. Rays of speed that a accelerates (this spiral flow works)

The air cylinder, so to speak accelerated air emerging from the slots, forms in its peripheral region highly turbulent zones (vortices) which extend to the wall of the combustion chamber. Highly turbulent zones are formed to the right and left of the slots, i.e. in the region of the bridges. The height of the annular space, the width of the slots, their number and length are determined according to the required burner performance.

To achieve an optimum combustion chamber, a positive flow can be maintained. This can be done with cut slits.

Certain constructions in the combustion chamber or negative residual spiral to achieve obliquely (at a certain angle) The slots then affect the stronger or combustion at the expedient that the milder deflection of the tangential component of velocity.

The purpose of the shutter in the cylindrical central air distributor tube is to divert the combustion air spirally through the slots. In order to achieve low emission combustion, a partial flue gas stream can be recycled through this shutter orifice (the orifice diameter is tested by experiment), which again contributes to the combustion (recirculation).

To achieve this, a three-dimensional spiral in the center of the central air distributor tube expediently has a current cone with a negative axial velocity component in the orifice region. The high spiral flow required for this can be achieved by the corresponding insertion device (blade angle, blade height, number of blades), which, however, entails greater energy requirements for the blower (for example, increasing the power consumption of the burner in the home).

If it is desired to operate a combustion chamber with low energy requirements (blower input as low as possible) (eg in vehicle holding heater, stove), it is advisable to dispense with the return flow cone and completely close the central air manifold. In this way, as above, the combustion air is diverted through the slots, but the hot flue gas is now not returned.

According to the invention, this is a dual operation of a burner (with or without hot gas recirculation) which operates according to one basic principle, is sufficiently tested and brings corresponding advantages to its intended use.

The advantage of this air distribution is that when the spiral air distributor is properly adjusted and the oven arrangement is closed to the annular combustion chamber, which allows for a shortened density, combustion occurs throughout and is after a few millimeters of construction (greater power flame. It may be expedient to employ a turbulence flame shield for additional mixing and combustion.

dispensing with the trap is additional to some embodiments

With respect to fuel preparation, air is supplied through the central air distributor tube to the combustion chamber at a certain distance from the bottom of the combustion chamber in a certain zone to be investigated by experiment. The axial zone located between the bottom of the combustion chamber and the air outlet zone serves as a gasification space. In this space, most of the fuel vaporizes beforehand and is introduced in the gaseous state into the highly turbulent combustion air zone, where it then reacts and burns. The fuel remaining in the wall lining is conveyed by capillary action in the liquid state up to the combustion air zone, where it evaporates completely and burns in a diffuse flame. By advantageous treatment of the fuel according to the invention it is possible to create a relatively homogeneous combustion (the annular space is fully utilized) in the annular combustion space. The combustion is terminated a few millimeters behind the air distributor oven.

An ignition device is mounted in or on the gasification chamber. Ideally, the ignition device creates a separate pilot flame that initiates the evaporation process in the pre-evaporation zone. The ignition flame continues to burn automatically after the ignition aids (glow plugs, glow plugs) have been shut down. The fuel can be supplied to the combustion chamber directly or via the ignition device. The ignition device preferably has a supply of ignition air.

Preferably, the air intake components are of fine-grained cast iron, which is an insertion device, an air distributor tube and, if necessary, a connecting flange.

In combustion chambers with delayed start-up (time to maximum power) and high durability requirements, or for production reasons, it may be advantageous to make the combustion chamber jacket and hot flue gas inlet tube (hot-tube) also made of china cast iron, be associated with the air intake parts.

Since this embodiment has the drawback that relatively large masses have to be heated, and in some embodiments of burners the maximum output is to be achieved as quickly as possible (additional heating), it is advantageous to separate the combustion chamber casing and the hot flue gas inlet pipe. made of thin sheet metal. This essentially one-piece part has the advantage of low weight and heats up very quickly, which is advantageous for the gasification and evaporation process. A further advantage is that the air intake part is a smaller component than the entire cylindrical combustion chamber and thus produces more parts as a single casting, which reduces the unit cost.

Said component may be designed for thermal separation (note: the air conducting components cool or conduct the heat further to the electric motor) by inserting an insulator in the form of a seal between the combustion chamber casing and the air supply element.

The burner according to the invention differs from the aforementioned known burners both in the method of air distribution and incineration, and in the method of preparation of the mixture and in its high power density, which means that higher outputs are achieved from a comparable combustion chamber volume.

The invention is illustrated, but not limited, by the following examples.

Picture list:

On giant . 1 Yippee evaporative burner in schematic axial cut. On giant . 2 Yippee other evaporation burner similar to Figure 1. On giant . 3 Yippee third variant design of evaporative burner in longitudinal cut as FIG. 1 and 2. On giant . 4 Yippee fourth variant design. On giant . 5 Yippee detail A of FIG. 4. On giant . 6 Yippee detail of FIG elsewhere in the circuit. On giant . 7 Yippee detail FIG. 6 in another embodiment.

Fig. 8 shows a variant of the embodiment according to Fig. 7 with a transition ring in the direction of the porous lining.

Fig. 9 is a schematic partial cross-sectional view of the end of the air intake cylindrical tube in the direction of flow with the shutter.

Fig. 10 is a cross-sectional view B-B of the air inlet tube of Fig. 9.

Fig. 11 is a cross-sectional view of an evaporative burner with side ignition device shown.

DETAILED DESCRIPTION OF THE INVENTION

The evaporator burner shown in FIG. 1 consists of a cylindrical combustion chamber X and a coaxial fire tube 20 shown in FIG. 1 as an upwardly open connection.

The cylindrical combustion chamber X comprises a planar front wall X, a substantially cylindrical peripheral wall 2 that extends from the planar front wall 6 at right angles upward, further comprising a cylindrical air intake tube 8 coaxial with the cylindrical peripheral wall 2 and projecting at right angles. and a porous lining 3, wherein an outer side sleeve X is integrated in the cylindrical circumferential wall 2 to accommodate an ignition device X, for example a hot pin.

Fuel is also supplied to the cylindrical combustion chamber X by an outer side nozzle X, as further described in connection with FIG. 11.

In the region of the outer side nipple X, the porous lining X has at least one radial orifice or through hole 24 allowing ignition or passage of flame from the outer side nipple X to the annular space between the cylindrical circumferential wall X or porous lining X and the cylindrical air inlet tube X to which is assigned an integral distributor device with guide vanes 31 according to FIG. 2, which are preferably adhered.

The cylindrical air inlet tube 8 is made together with the end wall 6 as a single casting and, at its upper end, i.e. in the downstream direction, is provided with radial air outlets 6 which are evenly distributed around the sleeve circumference. and are described in more detail.

Coaxially downstream of the air inlet tube 11 is a flame orifice 19, or a flame trap with a central orifice, which (or which) is fixed by a cylindrical outer flange to the inner circumference of the cylindrical peripheral wall 2.

The heat pipe 20 and the cylindrical peripheral wall 2 of FIG. 1 are made in one piece from a deep-drawing sheet and are welded by a peripheral weld 25 to said casting consisting of a front wall 6 and a cylindrical air supply tube 8. This makes production and assembly simple. The casting is relatively small. Therefore, several castings can be cast in a single casting frame, which reduces the manufacturing cost. An advantage is furthermore that the cylindrical air supply tube 8 is accessible all around (molding). The combustion chamber casing or cylindrical peripheral wall 2 with an integrated fire tube 20 made of sheet metal requires relatively little material and contributes substantially to the reduction of the burner weight. The overall result in operation is rapid heating of the evaporation surfaces and very good starting behavior. Smoke is negligible.

In contrast to the variant of FIG. 1, the cylindrical combustion chamber 7 can also be operated without a porous liner 3, since the fuel supply and evaporation takes place via the outer side sleeve 4 of the ignition device 5 (FIG. 11).

In front of the cylindrical air inlet tube 8 (as shown in FIG. 1 below) is coaxially integrated integrated distributor device 32 according to FIG. 2, which supplies air to the cylindrical air inlet tube 8 by a spiral flow, wherein the spiral flow

The air supply is predominantly applied to the inner circumference of the cylindrical tube 8 and the air is fed by a force component directed radially outwardly through the radial air outlets 6 into the annular space of the combustion chamber, i.e. the annular space is filled with air.

The embodiment of the diffusion flame vaporizer burner, i.e. the carburetor burner in FIG. 2, is substantially similar to that of FIG. 1, except that there is no deep-drawn sheet molding consisting of a heat pipe 20 and a peripheral wall 2 and a front wall casting. (5 and cylindrical tubes 8 of the air intake, and the integrated distribution device 32 with the guide vanes 31 connected by a weld 25, but is provided at this circumference with an insulating element 21, the sheet metal and the casting being firmly connected to each other by a tight joint (not shown) As a result, the sheet metal molding and the casting are thermally separated, and the direct connection to the hot parts is thereby interrupted.

The embodiment shown in FIG. 3 corresponds essentially to the embodiment of FIGS. 1 and 2, but there is no flame screen 19. Furthermore, the peripheral wall 2 is formed as a single casting together with the end wall 6 and the cylindrical air supply tube 8, while the heat pipe 20 is a deep-drawn sheet metal blank.

The cylindrical air supply tube 8 has at its upper end a stopper 10 in the form of a plug, which may also be a plate or diffuser. The shutter 10 has a central through hole 11 that is exactly coaxial with the overall structure and creates an axial return flow R for the combustion of combustion air or flue gas, as will be described hereinafter.

The vaporizer burner of FIG. 3, in contrast to the two variants in which fuel is supplied through the outer side nozzle 4 to the ignition device, has a fuel supply 6 with fuel line 13, as shown as a variant of the vaporizer burner of FIG. uses an annular channel 1 2.

The cylindrical combustion chamber 1 is essentially an evaporative combustion chamber, which is preferably constructed as a cylindrical cast combustion chamber with a bottom, and the combustion chamber housing on the housing has an axial pocket for an ignition device, for example a pin or a candle, and the ignition device may extend obliquely into the annular space of the combustion chamber. Further arrangements for the ignition device are described in connection with FIG. 11.

In the middle of the combustion chamber pot there is a cylindrical air inlet tube 8 or a longitudinal slot which distributes air L supplied from below by a spiral flow evenly in a radial direction to the inner shell of the combustion chamber, the spiral flow preferably being formed by a vortex chamber or supply device. The radial air outlets 6 through the wall of the air inlet tube may also be oblique slots and other geometric openings with additional deflection or form, for example through holes 22 according to FIGS. 9 and 10 which have deflected edges with respect to the radial extension of the air inlet tube.

The axially supplied combustion air thus flows spirally L, the maximum velocity being near the wall of the oven and, due to the open shutter 10, forms a backflow cone in the middle of the shutter 10, causing a partial backflow R during combustion. the air outlets 6 in the wall of the oven into a circular combustion chamber ("recirculation") and re-participate in the combustion, giving combustion particularly free of pollutants.

The partial return flow may be a flue gas return line in a closed burner system or in an open atmospheric burner system by sucking in ambient air, which then results in a blue burner.

The shutter may be a plate, diffuser or the like having preferably a cylindrical through hole 11, which may also be frustoconical and extend conically in the direction of the end wall 6.

Since, in the case of heaters, smaller amounts of fuel, the fuel distribution is provided by the combustion chamber space, which provides this distribution

Optimal Circular To achieve amounts as follows:

There must be a small problem of fuel distribution, it is necessary to make full use of the fuel when it is available, these small fuels need to create capillaries. You get it

Fuel is supplied through the annular channel 12 of Figures 5-8, which is formed near the interior of the bottom of the combustion chamber. This annular channel 12 is formed especially in the region of the end wall 6 in the form of a wall pocket 15 on the inside of the combustion chamber into which the concentric distribution ring 14 is inserted. The distribution ring 14 can have a circular cross section according to FIGS. 7. The distribution ring 14 may extend through the uniformly or unevenly distributed axial holes 17 so that the fuel side facing away from the annular channel can also be supplied with fuel. Above the separating ring 14 there is a casing porous liner 3, a web or the like as shown in FIGS. 5 and 6, or a transition ring 18 preferably of Triton or the like adjacent the front of the casing porous liner 3. and compensates the manufacturing tolerances of the individual parts.

Thus, the fuel is fed through the annular space in the form of an annular channel 12, which may have a particularly rectangular, but also a trapezoidal cross-section, optionally with rounding. Fuel is supplied to this channel through the bottom of the combustion chamber through a fuel line 13 at an angle, preferably in the direction of the axis of the combustion chamber. In the immediate vicinity of the fuel inlet, the annular channel in the direction of the porous lining is substantially closed in order to ensure that the incoming fuel is distributed evenly around the circumference to the right and left, with two annular capillaries at the periphery of the combustion chamber. and divides them around the perimeter. Since there is a slight gap between the annular channel 12 due to the axial holes 17 and / or the clearance between the distribution ring 14 and the wall pocket 15, the fuel exits through these holes and gaps axially upwardly and sucks the porous lining 3 (fabric or sintered metal). and leads to combustion.

To start the operation, an ignition device 5, for example a glow plug with an external side nozzle 4, is heated, and a partial air flow is supplied through the side nozzle 4, which then forms a combustible mixture with the vaporised fuel. A small pilot flame heats the combustion chamber's circular space and ignites the vaporized fuel. The combustion air exiting through the slots or windows of the cylindrical air inlet tube 8 forms a turbulent zone with right-handed and left-handed swirl zones in the radial direction near the wall. For example, in a feed with 12 longitudinal slits, 12 left-handed and 12 right-handed swirls are formed. Fuel vaporized by combustion heat is carried by these vortices and burns with a blue diffuse flame. The flame fills the entire circular chamber of the combustion chamber. Preferably, a plurality of slits are used, as this increases the turbulent zone. The combustion takes place largely in the annular space of the combustion chamber between the bottom and the height of the slot in the cross-sectional plane and between the slots, i.e. in the region of the bridges. Thus, the combustion in the combustion chamber is closed. The heat pipe 20 serves only to remove hot flue gases and to homogenize the temperature distribution in the pipe, and no more fuel is burned in the pipe.

FIG. 1 shows an evaporative burner, in particular with a combustion chamber X with a porous lining 3 with an outer side sleeve 4 for a tangentially mounted ignition device X, for example with a hot pin.

The ignition device may also be axially or radially positioned relative to the torch axis.

Both the ignition air 26 and the fuel 27 are fed through annular channels around the igniter X, which is provided with a porous sheath or screen, the textile or fuel being ignited in the outer lateral flame is transferred through a passage 24 in the jacket porous lining X to a similar material. X, wherein the ignition opening of the annular space of the combustion chamber. Since the sheathed porous liner X adjoins the combustion chamber X, the fuel supplied to the porous sheath 30 of the liner X is transferred and vaporized on the inside of the sheath and ignited by a flame-penetrating opening 24.

for porous combustion chamber jacket with through ignition

It is further recalled that the subject-matter of protection is all the individual features of the claims. Thus, all inventive features fall within the protected scope of the invention.

Industrial applicability

Combustion burner enabling, from intensive combustion, simple, compact design rationally manufacture and mountable for all types of liquid fuel combustion.

Claims (28)

PATENT CLAIMS An evaporative burner with a combustion chamber for a heater or for thermal regeneration of a particulate trap filter having a peripheral wall having a lateral outer sleeve for receiving the ignition device, with a front wall having a central opening, with an air intake tube extending coaxially into the combustion chamber , with air outlets radially extending through the air inlet and fuel supply pipes, characterized in that the cylindrical air inlet pipe (8) of the combustion chamber (1) is associated with an integrated spiral air supply distributor (32). Evaporative burner according to claim 1, characterized in that the integrated distribution device (32) has distribution vanes (31) which are an integral part of the cylindrical air supply tube (8). Evaporative burner according to claim 1 or 2, characterized in that a fire tube (20) is arranged downstream of the combustion chamber (1). An evaporative burner according to claim 3, characterized in that the heat pipe (20) and the cylindrical peripheral wall (2) of the combustion chamber (1) are one piece. Evaporative burner according to claim 3 or 4, characterized in that the one-piece piece is a sheet metal molding. 6. An evaporative burner according to claim 5, wherein the one-piece piece is a deep-drawn sheet metal blank. Evaporative burner according to claims 4 to 6, characterized in that the front wall (6) of the combustion chamber (1) and the cylindrical air supply pipe (8) and the integrated insertion device (32) form a single casting. 8. Evaporative burner according to claim 7, characterized in that the one-piece piece is welded to the casting. Evaporative burner according to claim 7, characterized in that the one-piece piece is firmly connected to the casting via an insulating element (21) 10. characterized by (2) a combustion chamber of the porous lining (3). Evaporative burner according to claims 1 to 9, characterized in that the cylindrical peripheral wall (1) has a jacket on the jacket side. Evaporative burner according to claims 1 to 10, characterized in that the radial air outlets (9) of the cylindrical air inlet pipe (8) are distributed through the openings (22) or longitudinal slots open at the end of the pipe upstream. Evaporative burner according to claims 1 to 11, characterized in that the through holes (22) or longitudinal slots have curved edges with respect to the radial extension of the cylindrical air inlet pipe (8). Vaporizer burner according to one of Claims 1 to 12, characterized in that the fuel supply (7) is connected to the ignition device (5) via an external side nozzle (4). Evaporative burner according to one of Claims 1 to 12, characterized in that the fuel inlet (7) is supplied via an annular channel (12) in the region of the front wall (6) of the combustion chamber (1). Evaporative burner according to claims 1 to 14, characterized in that the cylindrical air inlet tube (8) is closed at the end in the direction of flow or has a closed front wall. Evaporating burner according to one of Claims 1 to 14, characterized in that the cylindrical air inlet pipe (8) at the end of the air flow deflects a shutter (10) with a central through hole (11) for axial return flow. (R) flue gas in the middle of a vortex of a spiral air stream (I.). An evaporative burner according to claim 16, characterized in that the shutter (10) is a plate or diffuser. Evaporator burner according to claim 16, characterized in that the central opening (11) of the shutter (10) is a truncated cone, the conical extension being upstream. or 17, through which The vaporizer burner of claim 17, wherein the conical extension comprises an inner annular extension of the shutter (10). Evaporative burner according to claims 14 to 19, characterized in that the entire front face of the jacket porous liner (3) is preceded by an annular channel (12) which is connected to the fuel line (13) outside the combustion chamber, which preferably opens in the axial direction of the combustion chamber (1) into the annular channel (12). 21. Evaporator burner according to claim 20, characterized in that the annular channel (12) forms a distribution ring (14) which is inserted into the wall pocket (15) at the end of the inner circumference of the cylindrical peripheral wall (2) upstream. An evaporative burner according to claim 21, characterized in that the distribution ring (14) has a circular cross-section. Vaporizer burner according to claim 21, characterized in that the distribution ring (14) has a rectangular, square or trapezoidal cross-section, the end facing upstream being chamfered (16). Evaporative burner according to claims 21 to 23, characterized in that the distribution ring (14) has circumferentially distributed axial holes (17). Evaporative burner according to claim 23, characterized in that the number of axial holes (17) corresponds to the number of radial air outlets (9) by the air supply tube (8). Evaporative burner according to claims 21 to 25, mark ící se team that between distributors ring (14) gradient circle and mantle (18). porous lining (3) is inserted 27. Evaporative burner according to claim 26, n ačující by that transition ring (18) is from Triton or of ceramic fibers. Evaporative burner according to claims 1 to 27, characterized in that a flame curtain (19) or a flame arrester is arranged coaxially downstream in the combustion chamber (1) downstream of the cylindrical air supply pipe (8). 29. An evaporative burner according to claim 1 to 28, mark ici with that when traffic atmospheric burner automatic suction takes place air from the surroundings. 30. An evaporative burner according to claim 1 to 29 mark ici is that the ignition equipment (5) the duty of the annular space of the combustion chamber extends obliquely. Evaporator burner according to claims 1 to 29, characterized in that the outer side sleeve (4) with the ignition device (5) is positioned upstream of the circular combustion chamber axially, tangentially or radially, the circular chamber of the combustion chamber being connected by the outer side sleeve (4). ) through at least one through hole