DE2551087A1 - BURNERS FOR LIQUID FUEL - Google Patents

Description

255108?

MJ-WAY HEATING PLM (TS LIMITED, P ₀ Q. Box 1, Vines Lane Droitwioh, Worcestershire »England

Liquid fuel burners

The present invention relates to liquid fuel burners

According to the present invention, "the burner for the liquid fuel from a pipe element used for feeding the same, which is located at its outlet end having a nozzle and is characterized in that a second tubular element, the first tubular element to form a surrounds first annular air passage, which has a divergent shape at the outlet end, that a third tubular element is provided which encloses the second tubular element to form a second annular air passage and in the vicinity the outlet end of the first tubular element has an outlet, which converges in the exit direction, and that swirl inserts are provided in the first and second air passages «.

According to a preferred embodiment of the invention, the swirl inserts in the first and second air passages are arranged in such a way that they give the air a movement in the same direction of rotation _{or the like}

According to another advantageous embodiment of the invention the third pipe element is surrounded by a bushing which defines a third air passage

In the following an embodiment will be described with reference to the drawing, which is a longitudinal section through illustrated a liquid fuel burner according to the invention

609822/0698

7551087

The illustrated burner has a central rod-shaped Pipe element 10, which is provided on the outlet side with a nozzle 11, which passes through the pipe element 10 Fuel is sprayed in the form of a conical jet. A second cylindrical tubular element 12 surrounds the first tubular element 10 and together with this defines an annular air passage Let 13 · an outer conical surface 14 · on the tube 12, which with a correspondingly extending conical inner surface 15 on the spray nozzle 11 cooperates, defines an outlet for the air passage 13, the outlet in the direction of flow of the liquid Fuel diverges · The passage 13 is provided with a plurality of swirl plates 17, which are arranged so that that they are the air flowing through the passage 13 during operation impose a helical movement.

A third cylindrical pipe element 19 gives the pipe 12 to form a further annular passage 19. Swirl plates 23 are also provided in passage 19, which are arranged so that they give the air flow through the passage 19 a helical movement in the same sense as the flow through the Grant passage 13 _o The first tubular element 10 as well as the second and third tubular elements 12 and 18 and the baffle plates 17 and 23 are made entirely of metal.

The arrangement described above forms a unit through which in operation the liquid fuel and the primary combustion gases, e.g. air is supplied. The occurring Helical primary air flow through outlets 16 and 22 causes the air to mix with the fuel and leads to great flame stability without the need consists in providing a ceramic flame protection.

The tube 18 forms the outer wall of that described above Device o It is inserted into a cylindrical socket 24,

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which in turn forms the inner wall of a secondary air supply. The cylindrical sleeves 25 and 26 are concentric arranged to the socket 24 and define secondary air passages 27 and 28o Two sets of swirl plates 29, 30 are arranged in the passages 27 and 28 and also produce a helical movement of the secondary air This helical movement is also given in the same direction of rotation as with the primary air.

The ends of the tube 18 and the sockets 24 and 25 are in the illustrated embodiment essentially in the same Level. The end of the socket 26 protrudes above this plane an amount that does not exceed the amount of the diameter of the bushing 26. In addition, the end of the socket 26 - as illustrated - be designed to converge in the direction of the air flow. But it can also take the form of a zy « Continue the Lindrian approach.

The burner device according to the invention can in particular with an air supply fan that has separate high and low pressure outlets. A blower of the foregoing Type is described in the British file * 1 125 075 *

Expectations

609822/0698

Claims (13)

'Expectations 1) burner for liquid fuel consisting of a first V _- / pipe element used for feeding the liquid fuel, which has a nozzle at the outlet end, characterized in that a second tubular element (12) is the surrounds the first tubular element (10) to form a first annular air passage (13) which at the outlet end has a diver- gente shape (16) has that a third tubular element (18) is provided, which the second tubular element (12) to form a second annular air passage (19) surrounds and in the M & e of the exit of the first pipe element (10) has an outlet (22) which converges in the outlet direction and that swirl inserts in the first and second air passages (17 »2J) are provided. 2) burner according to claim 1, characterized in that swirl- inserts (17 »23) in the first and second air outlet (13, 19) are provided which give the two air currents a helical movement in the same direction of rotation. 3) burner according to claim 1 or 2, characterized in that the first, second and third tubular elements (10, 12, 18) and the twist inserts (17, 23) are made of metal » 4) burner according to one of the preceding claims, characterized in that that the outlet (16) of the first air passage (13) between an outer conical surface (15) on the Dt "e (11) and an inner conical surface (14) of the second Pipe element (12) was lying - 5 -609822/0698 ? B R 1 O 8 7 5) burner according to one of the preceding claims, characterized characterized in that the second air passage (19) has an outlet (22) having between a conical outer surface of the second tubular element (12) and an inner conical Surface of the third tubular element (18) was located 6) Burner according to one of the preceding claims, characterized in that it has a socket (25) which surrounds the second tubular element (18) and delimits with this a third annular air passage (27) 7) Burner according to claim 6, characterized in that swirl inserts (29) are arranged in the third air passage (27) 8) burner according to claim 7 »characterized in that the Twist inserts or swirlers (17 »23, 29) in the first, second and third air passage are arranged to cause helical movement of the air currents in the same Cause turning senses, 9) Burner according to claim 8, characterized in that a second socket (26) is provided which supports the first beech (25) surrounds and that the annular space between the two sockets delimited a fourth air passage (28) 10) Burner according to claim 9 »characterized in that swirl inserts (30) are provided in the fourth air passage. 11) Burner according to claim 10, characterized in that the swirl inserts (30) are arranged in the fourth air passage (28) are that they impart a movement to the air flowing through, which is in the same direction of rotation as the air movement takes place in the first, second and third air passages. ■■ »6« · 609822/0698 551087- 12) Burner according to one of Claims 8 "to 11, characterized in that indicates that the end of the third tubular element (18) and the first socket (25) are substantially in the same plane lie and that the end of the second socket (26) protruded beyond this plane 13) Burner according to claim 12, characterized in that the second bushing (26) has a substantially cylindrical shape and that the part of the second bushing projecting beyond the plane is not longer than the cylindrical diameter
the second socket (26) is _o 609822/0698