Type of burning device for producing gas mixtures

Abstract

A new type of burning device for producing hydrohalogen compounds.

Claims

1. A burning device for producing hydrogen halide, comprising at least two concentrically arranged combustion tubes, wherein a swirl generator is arranged in an inner combustion tube, wherein the swirl generator has an outer diameter of at least 30 mm.

2. The burning device according to claim 1, wherein the outer combustion tube, the inner combustion tube and the swirl generator comprise corrosion-resistant material, preferably selected from the group consisting of graphite, synthetic graphite, graphite impregnated with synthetic resin, preferably graphite impregnated with phenolic resin, silicon carbide, graphite coated with silicon carbide, silica glass, aluminum oxide or any mixtures thereof.

3. The burning device according to claim 1, wherein the swirl generator is from 0.5 to 2 times the length.

4. The burning device according to claim 1, wherein the swirl generator has the outer diameter from 30 mm to 300 mm.

5. The burning device according to claim 1, wherein the ratio of a core diameter to an outer diameter of the swirl generator is from 1:2.5 to 1:1.5.

6. The burning device according to claim 1, wherein the swirl generator has at least two guide vanes.

7. The burning device according to claim 6, wherein a free cross-sectional area, based on a total cross-sectional area of the swirl generator that is subject to flow, is from 15 to 75%.

8. The burning device according to claim 6, wherein the guide vanes extend in a spiral shape along a longitudinal axis of the swirl generator.

9. The burning device according to claim 6, wherein the guide vanes have an average angle of incidence of from 35 to 85.

10. The burning device according to claim 1, wherein a supplied gas is discharged axially out of the outer combustion tube.

11. The burning device according to claim 1, wherein the inner combustion tube and the outer combustion tube are closed off at the same height.

12. The burning device according to claim 1, wherein a spindle is arranged in the inner combustion tube on a side of the swirl generator that is subject to flow.

13. The burning device according to claim 12, wherein the spindle diameter and core diameter are equal.

14. The burning device according to claim 2, wherein the diameter of the outer combustion tube narrows toward the combustion chamber.

15. The burning device according to claim 1, wherein the swirl generator is recessed in the inner combustion tube by up to two times the outer diameter of the swirl generator.

Description

BRIEF DESCRIPTION OF THE DRAWING

(1) In the following, purely by way of example, the present invention is described by way of advantageous embodiments and with reference to the accompanying drawings. The invention is not limited by the figures.

(2) FIG. 1 is a cross-sectional view of a part of the hydrogen halide synthesis unit

(3) FIG. 2 is a cross-sectional view of a burning device

(4) FIG. 3 is a cross-sectional view of a detail from the upper region of the burning device

(5) FIG. 4a shows a swirl generator

(6) FIG. 4b is a plan view of a swirl generator

(7) FIG. 5 is a cross-sectional view of a swirl generator comprising a spindle

DETAILED DESCRIPTION OF THE DRAWING

(8) FIG. 1 is a cross-sectional view of a part of the hydrogen halide synthesis unit. The gases are supplied to the combustion chamber (2) by means of the burning device (1). The gases are discharged out of the burning device at the burner outlet (3). In the combustion chamber (2), the supplied gases react by burning and form a flame (4).

(9) FIG. 2 shows a burning device (1) comprising two concentrically arranged combustion tubes, namely the inner combustion tube (7) and the outer combustion tube (8). A swirl generator (9) is arranged in the inner combustion tube (7), said swirl generator being attached via a spindle (10). The hydrogen gas is transported over the gap between the inner and outer combustion tubes, the hydrogen gas being supplied to the burner via the supply (6). The chlorine gas is supplied to the inner combustion tube via (5).

(10) FIG. 3 is a cross-sectional view of a detail from the upper region of the burning device (1) comprising two concentrically arranged combustion tubes, namely the inner combustion tube (7) and the outer combustion tube (8). The inner combustion tube (7) has an inner diameter D.sup.I.sub.Innen an outer diameter D.sup.A.sub.Innen. The swirl generator (12) is located in the inner combustion tube (7). The swirl generator (12) comprises guide vanes (11) and a core (9), the core of the swirl generator having a diameter of D.sub.Kern. The swirl generator (9) is recessed, since it does not close off with the inner combustion tube (7) and outer combustion tube (8) at the burner outlet.

(11) FIG. 4a shows a swirl generator (12). The swirl generator (12) comprises guide vanes (11), said guide vanes having an average angle of incidence y.

(12) FIG. 4b is a plan view of a swirl generator (12), the swirl generator (12) having guide vanes (11), a core (9) and an outer diameter (14). The free cross-sectional area (15), through which the chlorine gas flows, is between the guide vanes (11).

(13) FIG. 5 is a cross-sectional view of the swirl generator (12), the swirl generator comprising a spindle (13).

(14) In the following, the present invention is described by way of embodiments, wherein the embodiments do not restrict the invention.

Embodiment 1

(15) An outer combustion tube (8) and an inner combustion tube (7) made of graphite are provided. The two tubes have a length of 40 cm. The outer combustion tube (8) has an outer diameter of 18 cm. The inner combustion tube (7) has a diameter (D.sup.A.sub.Innen) of 12 cm. A swirl generator (9) made of graphite is inserted in the inner combustion tube (7). The swirl generator (9) has a length of 14 cm, the guide vanes having an average angle of incidence y of 60. The free cross-sectional area is 25%. The core of the swirl generator has a diameter of 5 cm. The swirl generator closes off flush with the inner combustion tube (7) and outer combustion tube (8) and is glued into the inner combustion tube (7).

Embodiment 2

(16) An outer combustion tube (8) and an inner combustion tube (7) made of graphite are provided. The two tubes have a length of 40 cm. The outer combustion tube (8) has a diameter of 18 cm. The inner combustion tube (7) has a diameter of 12 cm. A swirl generator (9) made of graphite is inserted in the inner combustion tube (7). The swirl generator (9) has a length of 14 cm, the guide vanes having an angle of incidence y of 60. The free cross-sectional area is 40%. The core of the swirl generator has a diameter of 5 cm. The swirl generator is recessed in the inner combustion tube (7) by 2.5 cm and is glued into the inner combustion tube (7).