JPS60129520A - Burner generating inert gas - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a burner for producing an inert gas constructed according to the general idea of claim 1.

[Conventional technology]

For example, if a burner described in a technical document such as "Inert Gas Generator" No. 1824-4/83 published by the applicant company is used, almost stoichiometric combustion can be achieved. Inert gases can be produced from liquid or gaseous fuels.

In conventionally known burners constructed in this manner, the combustion is actively mixed with the combustion air in the region of turbulent flow caused by convection caused by the combustion air swirling tangentially into the specially designed combustion chamber. Since the burners known to date have been designed to produce an approximately constant amount of inert gas, it is possible to adjust this type of burner installation within certain limits, but the load When increases quadratically, the adjustment range is restricted due to air pressure loss. On the other hand, if the load decreases,
The lower part of the adjustment range is also restricted, since the impulse flow required to create convective turbulence is significantly reduced.

[Purpose of the invention]

The aim of the invention is to improve burners of the initially mentioned type in such a way that it is possible to adjust the load while maintaining the flow within the burner.

In order to achieve the above-mentioned object, a burner has been proposed according to the invention, which is characterized by the construction set forth in the characterizing claim of claim 1. For advantageous embodiments of the invention, reference is made to the patent claims 2 to 7.

It is possible to adapt the cross-sectional area of the flow path to the required air volume, so that pre-drainage is maintained over the entire adjustment range of the burner.
It is possible to use the burner while always keeping the velocity of the air flowing through the flow channels of the unit as constant as possible.

Furthermore, the cross-sectional area required to flow the tangentially supplied portion of the combustion air is reduced to allow the axially supplied portion of the combustion air to flow, which is smaller than the tangentially supplied portion. It can be adjusted according to the cross-sectional area required. Therefore, the velocity of the combustion air flowing tangentially into the combustion chamber is maintained at the same velocity, so that even in the case of partial load, a flow region in which a turbulent flow is formed due to convection can be maintained in the combustion chamber.

〔Example〕

The invention will now be described in detail with reference to the accompanying drawings, which illustrate two preferred embodiments of the invention.

The burner according to the invention comprises a casing 1 into which a burner lance 3 fitted with a nozzle is inserted through a front wall 2. In the embodiment shown, the burner lance 3 is designed as an oil lance.

The combustion chamber 4 is coaxially connected to the burner lance 3 in the casing 1
located within. The combustion chamber 4 comprises a conically widened section 5 extending into a conically tapered section 6. The walls of the combustion chamber 4 are made of metallic material.

The burner communicates with a cooling scrubber (not shown) that purifies the inert gas.

The combustion chamber 4 has at its upper part an inlet hole 7 through which fuel such as atomized oil and a part of the combustion air are introduced, and an inlet 8 through which the majority of the combustion air is introduced.
in the tangential direction. Two pipes 9 and 10 supplying combustion air are installed in the casing 1.

One of the pipe joints 9 is located near the front wall 2, and has a lower inlet hole 7 that opens in the axial direction and introduces a portion of the combustion air.
It communicates with The other fitting 10 is arranged in the side wall of the casing 1 and communicates with an inlet 8 which opens tangentially with respect to the combustion chamber 4 . A cylindrical peripheral wall 11 is provided between the pipe joint 10 and the combustion chamber 4. A number of holes 12 are drilled through the wall of the combustion chamber 4, and a portion of the combustion air supplied through the pipe fitting 10 flows into the combustion chamber 4 through the holes 12. . The direction of flow of fuel and combustion air is indicated by the arrows in FIGS. 1 and 4.

The inlet 8 , which is tangential to the combustion chamber 4 , is surrounded by a plaid unit 13 . The plaid
The unit 13 includes two spaced apart plates 14 and 15. One plate 14 is fixed to a conically expanded portion 5 forming the combustion chamber 4 . A curved plaid 16 between plates 14 and 15
and 17 are arranged to limit the flow path 18. The plaids 16 and 17 are spirally curved and are preferably designed as logarithmic short lines.

In the embodiment illustrated in FIGS. 1 to 3, the plaids 16 and 17 are mounted in pairs. One plaid 16 of the plaid pair is fixed to a plate 14 connected to the combustion chamber 4. Therefore, the plaid 16 is fixedly erected. A banking is provided between the rotatable plate 15 and the casing 1. Since the plaid 17 is fixed to the rotatable plate 15, the plaid 17 is rotatable.

The plate 15 is therefore rotatable about the longitudinal axis of the burner. The plate 15 can be rotated by drive means fixed to the plate 15.

In the embodiment shown in FIGS. 1 to 3, in order to rotate the plate 15, it is fixed to the plate 15 and is engaged with a rond (not shown) inserted through the casing 1. A rotary wheel 19 is used.

The rotatable plaid 17 has an arcuate section 2 on the inlet edge.
0. The radius of this section is equal to the radius of the fixed plaid inlet edge measured radially from the longitudinal axis of the burner plaid ring 13.

As shown in FIGS. 2 and 3, rotating the plate 15 and thereby the prered 17 changes the spacing between the plaid pairs 16 and 17. I can do it. In one end position, shown in the left half of FIGS. 2 and 1, the plaid pairs 16 and 17 are close together.

At this end position, the width of the channel 18 formed between the plaids 16 and 17 is the widest. As the load and therefore the air consumption decreases, the plate 15 is rotated until it reaches the end position shown in FIG. 3 and in the right half of FIG. As the play 1-15 rotates as described above, the arcuate section 20 of the rotating play 17 gradually moves away from the entrance edge of the stationary play 16.

The interval between the plaids 16 and 17 constituting the plaid pair is thick (the arc-shaped section 20 is the plaid pair).
The space 21 formed between the plaids 16 and 17 forming the pair is closed. (Thus, the cross-sectional area of the passage 18 used for passing the combustion air is reduced. If the consumption of combustion air is reduced, the flow can be reduced by reducing the flow cross-sectional area as described above. Road 18
The velocity of combustion air flowing through can be kept constant.

That is, by changing the length of the arcuate section 20, the two plaids 16 and 17 forming the plaid pair
You can change the width of the space in between.

The direction in which plate 15 is rotated to occupy the other end position is indicated by arrows in FIGS. 2 and 3.

In adjusting the channel width as described above, the axial The cross-sectional area of the inlet hole 7 in the direction can be adjusted to an appropriate degree. The cross-sectional area of the axial inlet hole 7 is limited by the inlet nozzle 24 .

This inlet nozzle widens conically in the direction in which the fuel lance 3 extends. The fuel lance 3 is axially movable and can project into the inlet nozzle 24 .

Depending on the position of the fuel lance 3 within the inlet nozzle 24, the cross-sectional area increases or decreases through which combustion air is passed. therefore,
By moving the fuel lance 3 in the axial direction, the cross-sectional area through which the combustion air supplied in the axial direction flows can be appropriately adjusted according to the position of the plaid. Another embodiment for adjusting the flow cross-section of the passageway 18 within the plaid unit 13 is shown in FIG. This example is
The embodiment is basically the same as the embodiment shown in FIG. 1, except that the rotatable plate 15 shown in FIG. be. A slot is formed in the plate 22, into which the plaid 16 fixedly erected on the plate 14 is inserted. The side of the plate 16 remote from the fixed plates 1 and 14 is closed by a cover 23, and by operating a rod 25 from the outside of the casing 1, the plate 22 can be moved in the axial direction. Regarding the fixed plate 14 of the plaid unit 13, the plate 2
The cross-sectional area of the passage 18 can be changed by moving the passage 2 in the axial direction and changing the passage height while keeping the passage width constant. In this embodiment as well, the burner lance 3 is moved axially with respect to the inlet nozzle 24 in accordance with the change in the cross-sectional area of the flow path 18.

[Brief explanation of drawings]

FIG. 1 is a one-to-one view of a burner constructed in accordance with one embodiment of the present invention, taken along its length, with the plays shown in the right and left halves of the figure; - The unit is shown occupying both extreme positions. FIG. 2 is a cross-sectional view of the burner taken along the line ■-n in FIG. 1. FIG. 3 is a cross-sectional view of the burner taken along line Ill, -Ill in FIG. 1. FIG. 4 is a longitudinal cross-sectional view of a burner constructed in accordance with another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1...Casing, 2...Front wall, 3...Burner lance, 4...Combustion chamber, 5...Conically tapered part, 6...・Conical expanded part, 7... Entrance hole, 8... Entrance, 9.10...
・Pipe joint, 11... Peripheral wall, 12... Hole, 13.
...Plaid unit, 14.15...Plate, 16.17...Plaid, 18...
Channel, 19... Turning wheel, 20... Arc-shaped section,
21... Vacancy, 22... Axially movable plate, 23... Cover, 24... Inlet nozzle, 25... Rod. Patent applicant: German Che Habcock Welke Akchengesellschaft Representative patent attorney: Kimio Hashimoto

Claims (1)

[Scope of Claims] (L) A fuel lance disposed within a casing (1), consisting of a combustion chamber (4) that widens into a conical shape and then tapers; It has an axial inlet hole (7) and a tangential inlet (8) for introducing combustion air, which inlet (8) is connected to two plates (14, 15, 22).
a curved plaid (16, 1) forming a channel (18) between said two plates (14, 15, 22);
7) a burner for producing an inert gas configured to arrange a flow path (18) and an axial inlet hole (9);
A burner characterized in that the cross-sectional area of the burner can be varied depending on the amount of air flowing through the flow path (18) and the inlet hole (9). (2) that the axial artificial hole (7) is limited by an inlet nozzle (24) that widens conically in the direction in which the fuel lance (3) extends; Burner according to claim 1, characterized in that it is movable within the nozzle (24). (3) The plaids (16, 17) are arranged in pairs, and one plaid (16) constituting the plaid pair is fixed, and the other plaid (17) is a plaid unit ( 13) is rotatably arranged about a longitudinal axis, and the rotatable plaid (17) is provided with an arc-shaped section (20); radius is plaid unit (13)
A fixed plaid (1
6) The burner according to claim 1 or 2, characterized in that the distance is equal to the entrance distance of item 6). (4) The fixed plaid (16) is the plaid unit (1
3), the plate (14) is connected to the combustion chamber (4), and the rotatable plaid (17) is attached to the plaid unit (13). and that said plate (15) is rotatably held in a sealed manner in the casing (1) of the burner. A burner according to claim 3. (5) Plaid (16) is Plaid unit (13)
The plate (14) connected to the combustion chamber (4)
fixed to and slidably opposite plates (
22) and said plate (22).
A burner according to claim 1 or 2, characterized in that the plate (16) is movable in the axial direction within the casing (1). )
A burner according to claim 1, 2 or 5, characterized in that the area through which the burner is inserted is sealed. (7) The part according to any one of claims 1 to 6, which is curved in a spiral shape from the plaids (16, 17).