JPS61143611A - Burner device for combustion furnace - Google Patents

Abstract

PURPOSE:To miniaturize the size and to lighten the weight of an injection gun, and to omit a changing action between a preheating burner and the injection gun, by projecting a truncated conical burner tile out of a furnace wall, and by forming primary air holes on the burner tile. CONSTITUTION:A truncated conical burner tile 14 is projected from a furnace wall 13, and primary air holes 15 are formed in the middle of a burner part in the axial direction having proper gaps in the circumferential direction. After preheating is completed by injecting preheating fuel from a nozzle 18, melted sulfur is injected into a furnace, and the primary air is injected into a conical space encircled by a burner tile 14 from the primary air holes 15. Stabilized combustion is taken place in the center of a conical space by the effect of reversing air flow. The secondary air is fed into a combustion chamber 12 from secondary air feed pores 20. In this structure, a widow box 16 can be set on the outer side of a burner tile. The size of an injection gun 17 can be shortened, because it is not necessary for the injection gun 17 to pierce through the window box 16. Besides, an changing action between the nozzle 18 and the gun 17 is not necessary, because the nozzle 18 to inject preheating fuel is set on the primary air hole 15.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a burner device for a combustion furnace.

In conventional technology, for example, in molten sulfur combustion furnaces applied to sulfuric acid plants, the use of atomizing media is undesirable from both performance and economical points of view, and pressure spray type injection guns are used. In this case, in order to always obtain a good spray condition, it is necessary to prepare a plurality of spray tips in response to load fluctuations and to replace them with appropriate spray tips as needed. When starting up the combustion furnace, a preheating burner is used to preheat the sulfur to a stable ignition temperature, and then the sulfur is replaced with an injection gun that injects molten sulfur, which ignites the sulfur in the high-temperature atmosphere inside the furnace.

Such a conventional combustion furnace burner will be explained using FIG. 8. In Figure 8, (υ is the combustion chamber, (2)
is the furnace wall, (3) is the burner tile, (4) is the wind box for primary air, (4a) is the primary air inlet for combustion, (5) is 2
A wind box for secondary air, (5a) is a secondary air inlet for combustion,
(6) is an injection gun that injects molten sulfur, (7) is a primary air supply port, (8) is a secondary air supply port, and the injection gun (6) includes an injection nozzle body (9), It consists of a spray tip attached to the tip of the injection nozzle body (9) and a steam jacket Qυ that covers the injection nozzle body (9). (lla) is the steam inlet, (llb)
is the drain pipe.

Problems to be Solved by the Invention According to the above-mentioned conventional configuration, the injection gun (6) is provided through the primary air wind box (4), which makes it dimensionally long. The injection gun (6) has to be integrated with the steam jacket (b) to maintain the viscosity of molten sulfur at a low level, which increases its weight, making it difficult to inject when replacing the spray tip aO or replacing it with a preheating burner. There was a problem in that the work of attaching and detaching the gun (6) was difficult and took a long time.

An object of the present invention is to provide a burner device for a combustion furnace that eliminates the above-mentioned problems.

° Means for solving the problem In order to solve the above problem, the burner device for a combustion furnace of the present invention has a top part located outside the furnace wall, a bottom part continuous with the furnace wall, and further located in the axially intermediate part. An injection gun having a truncated conical cylindrical burner tile in which primary air holes are formed at appropriate intervals in the circumferential direction, and an injection nozzle body with a spray tip attached to the tip located near the top opening of the burner tile. The configuration includes the following.

Function In the above configuration, the truncated conical cylindrical burner tile is made to protrude outward from the furnace wall, and the primary air hole is formed in this burner tile, so that the wind box for the primary air is designed to cover the burner tile. Since there is no need for the injection gun to penetrate the wind box, the injection gun can be made smaller and lighter. The combustion fluid injected from the spray tip of the injection gun is maintained in the conical space inside the burner tile by the backflow vortex airflow by introducing primary air for combustion from the primary air hole formed in the burner tile. A stable flame is formed by the flame effect.

EXAMPLE Hereinafter, an example of the present invention will be described based on FIGS. 1 and 2.

FIG. 1 is a sectional view of a burner device for a combustion furnace in an embodiment of the present invention, where -(2) is a combustion chamber, (to) is a furnace wall,
A truncated conical cylindrical burner tile α◆ whose top is located outside the furnace wall and whose bottom is continuous with the furnace wall is protruded from the furnace wall. In this burner tile α4, primary air holes (G) are formed at appropriate intervals in the circumferential direction at the center in the narrow direction. QllG is the furnace wall (2)
A wind box for primary air installed on the side of the combustion chamber.
It has a secondary air inlet (16a) and surrounds the burner tile Q4. (B) is an injection gun that injects molten sulfur, (Foundation) is a preheating fuel injection nozzle whose tip passes through the air box α and faces into the primary air hole, (
1 is a wind box for secondary air, (19a) is a secondary air inlet for combustion, and 2 is a plurality of secondary air supply ports formed in the furnace wall (to).

As shown in detail in FIG. 2, the injection gun αη has a casing (2) attached to the burner tile α→ by bolts (2) and covering the top opening of the burner tile α→.
and an injection nozzle body (E) inserted into and removably into the casing 4, and the injection nozzle body (E) has a spray located near the top opening of the burner tile α→ at the tip of the injection nozzle body (E). Tep (goods) are installed.

The casing (2) also serves as a steam jacket,
It has a steam inlet (22a), a drain (22b), and a molten sulfur inlet (22c). A presser bolt support metal fitting (E) is attached to the casing (2) by a bolt (), and a presser bolt (F) is screwed into the presser bolt support metal fitting (E) K. This holding bolt (2) presses the injection nozzle body inserted into the casing (2) toward the burner tile Q4 side and positions it at a predetermined position. @ (2) is an annular sealing member that seals the gap between the casing (2) and the injection nozzle body (2), (1) is a closing plate that covers the top opening of the burner tile Q4, and this closing plate A hole is formed in the center portion, that is, the portion facing the spray tip. (B) is a flapper valve installed inside the casing (2), and this flapper valve (
b), the injection nozzle body (2) is the casing (support)
When the casing (
This is to close the communication path between the outside of 2) and the inside of the burner tile α→.

Hereinafter, the effects of the above configuration will be explained.

Preheating at startup is performed by a preheating fuel injection nozzle. After the preheating is completed, the molten sulfur is transferred to the molten sulfur inlet (22
At the same time, the primary air for combustion is injected from the spray tip (C) through the injection nozzle main body (16a) and the air box QQ (to the primary air hole (to)). is introduced into a conical space surrounded by burner tiles α→. In this way, the flame is held at the center of the conical space due to the backflow effect of the airflow, resulting in stable combustion. Secondary air for combustion is supplied through the secondary air inlet (19a) and the wind box (
(to) and from the secondary air supply port (e) to the combustion chamber (2).
supplied to

In this way, the burner tile α◆ was made to protrude outward from the furnace wall (2), and the primary air hole (G) was formed in this burner tile α◆. Since it can be installed on the side and there is no need to penetrate the wind box to install the injection gun αη,
) can be shortened, and the injection gun aη can be made smaller and lighter. Also, preheating fuel injection nozzle (g)
Since the preheating fuel injection nozzle (G) can be made to face the primary air hole (G), there is no need to replace the preheating fuel injection nozzle (G) with the injection gun αη. Furthermore, as in this embodiment, if the injection nozzle body is inserted into the casing K so that it can be inserted and removed,
Just pull out the spray tip (c) from the spray nozzle body
As the spray gun (b) is smaller and lighter, the spray tip can be replaced even more easily and quickly. In addition, the combustion furnace has a high temperature and an internal pressure of 2000
Since the positive pressure is ffH,O~5000su+H20,
It is necessary to prevent the backflow of high-temperature gas in the furnace during replacement work, but by providing the flapper valve c3 as in this example, it is possible to completely prevent the backflow of high-temperature gas in the furnace, making it possible to prevent the backflow of high-temperature gas in the furnace as in the case of replacement work. There is no need to stop the blower for supplying combustion air and stop the operation of the furnace.

In the above embodiments, a molten sulfur combustion furnace has been described, but it goes without saying that the present invention can be applied to the combustion of various other combustion fluids.

Effects of the Invention As described above, according to the present invention, there is no need to provide the injection gun by penetrating the wind box, so the size of the injection gun can be shortened, and the injection gun can be made smaller and lighter. Therefore, the spray tip can be replaced easily and quickly. Moreover, since the preheating burner can be placed facing the primary air hole formed in the burner tile, the work of replacing the preheating burner and the injection gun can be eliminated.

[Brief Description of the Drawings] Fig. 1 is a sectional view of a burner device for a combustion furnace according to an embodiment of the present invention, Fig. 2 is an enlarged sectional view of the main part of the burner device for a combustion furnace, and Fig. 8 is a conventional one. FIG. 2 is a sectional view of a burner device for a combustion furnace. (To)... Furnace wall, α fathom... Verna tile, (G)・
...Primary air hole αη...Injection gun, slope...Injection nozzle body, ■...Spray tip.

Claims (1)

[Claims] 1. A truncated conical cylindrical burner tile whose top part is located outside the furnace wall, whose bottom part is continuous with the furnace wall, and in which primary air holes are formed at appropriate intervals in the circumferential direction at the intermediate position in the axial direction. and an injection gun having an injection nozzle body with a spray tip attached to the tip located near the top opening of the burner tile.