JP3019479U - Oxygen burner - Google Patents

Abstract

(57) [Summary] [Objective] To provide an oxygen burner which can be easily attached to a furnace wall and has a small arrangement space in the furnace. [Structure] A fuel gas passage 3 is formed in an inner cylinder 2 of a double-cylinder burner nozzle 1, and a fuel gas supply source is connected to the fuel gas passage 3. An oxygen passage 5 is formed in a space between the inner cylinder 2 and the outer cylinder 4 of the burner nozzle 1, and an oxygen supply source is connected to the oxygen passage 5. An ignition gas pipe 6 for passing a mixture of fuel gas and air is provided in the oxygen passage 5, and the tip of the ignition gas pipe 6 is connected to the tip of the fuel gas passage 3. Then, an air-fuel mixture from the ignition gas pipe 6 to the fuel gas passage 3 is ignited by an ignition plug 7 provided at a connecting portion between the ignition gas pipe 6 and the fuel gas passage 3, and combustion of the air-fuel mixture is performed as a pilot flame. Then, the fuel gas ejected from the fuel gas passage 3 into the furnace 20 is burned.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to improvement of an oxygen burner used in a melting furnace, an incinerator, or the like.

[0002]

[Prior art]

 Conventionally, oxygen burners used in melting furnaces and incinerators form a fuel gas passage in the inner cylinder of a double-cylinder burner nozzle, and an oxygen passage in the space between the inner cylinder and the outer cylinder. Has been formed. The tip of the burner nozzle is arranged in the furnace so that the fuel gas is ejected from the fuel gas passage into the furnace and the oxygen gas is ejected from the oxygen passage into the furnace.

In this oxygen burner, the tip of the ignition gas passage is arranged in the furnace independently of the burner nozzle, and the mixture of fuel gas and air is fed from the tip of the ignition gas passage to the furnace. The fuel gas injected from the burner nozzle into the furnace is ignited.

[0004]

[Problems to be solved by the device]

 In the conventional oxygen burner, since the burner nozzle and the ignition gas passage are configured independently, the burner nozzle and the ignition gas passage must be separately attached to the furnace wall, which is troublesome to install. It was Also, since both the tip of the burner nozzle and the ignition gas passage must be located on the furnace wall, the burner nozzle and the ignition gas passage occupy a relatively large space on the furnace wall, and the melting furnace and the incinerator can be used. It was an obstacle to miniaturization. An object of the present invention is to provide an oxygen burner which can be easily attached to the furnace wall and has a small space for disposing on the furnace wall.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention is configured as follows, as shown in FIGS. 1 and 2, for example. That is, the burner nozzle 1 is formed of an inner and outer double cylinder, the fuel gas passage 3 is formed in the inner cylinder 2 of the burner nozzle 1, the fuel gas supply source 16 is connected to the fuel gas passage 3, and the burner nozzle 1 In an oxygen burner in which an oxygen passage 5 is formed in the space between the cylinder 2 and the outer cylinder 4 and an oxygen supply source 17 is connected to the oxygen passage 5, an ignition gas that passes a mixture of fuel gas and air The passage 6 is provided in the oxygen passage 5, the tip of the ignition gas passage 6 is connected to the tip of the fuel gas passage 3, and the ignition device 7 is connected to the connection portion between the ignition gas passage 6 and the fuel gas passage 3. It is provided.

[0006]

[Action]

 The oxygen burner of the present invention operates as follows, as shown in FIGS. 1 and 2, for example. When the ignition device 7 is activated while the mixture gas of fuel gas and air is supplied to the ignition gas pipe 6, this mixture gas is generated by the ignition device 7 at the connection between the ignition gas passage 6 and the fuel gas passage 3. It is ignited and burns in the fuel gas passage 3 as a pilot fire.

In this state, when the fuel gas is supplied into the fuel gas passage 3 and the oxygen gas is supplied into the oxygen passage 5, the fuel gas supplied into the fuel gas passage 3 is fed into the furnace 20. Gushes into. At this time, part of the fuel gas mixes with the air contained in the air-fuel mixture from the ignition gas passage 6 and burns with the seed flame, and a flame is ejected into the furnace 20 together with the seed flame. Then, in the furnace 20, the fuel gas from the fuel gas passage 3 is mixed with the oxygen gas from the oxygen passage 5 and ignited by the flame.

This oxygen burner has a structure in which the burner nozzle 1 is attached to the furnace wall 21, and the oxygen gas passage 6 inside the burner nozzle 1 is not required to perform the work of attaching the ignition gas passage 6 to the furnace wall 21 separately from the burner nozzle 1. The fuel gas from the fuel gas passage 3 can be ignited by the pilot fire in the ignition gas passage 6 provided at 5.

[0009]

[Effect of device]

 The present invention has the following effects because it is configured and operates as described above. The ignition gas passage is provided in the oxygen passage in the burner nozzle, and the tip of this ignition gas passage is connected to the fuel gas passage so that the fuel gas ejected from the fuel gas passage to the outside of the burner nozzle is discharged from the ignition gas passage. Since it is possible to ignite by burning the mixture supplied to the gas passage, the oxygen burner of the present invention can be used simply by attaching the burner nozzle to the furnace wall, and the ignition gas passage separate from the burner nozzle. The work to attach to can be omitted. Therefore, the work of installing the oxygen burner in the furnace is facilitated, and the work time can be shortened.

Moreover, since only the burner nozzle is attached to the furnace wall, the space for disposing the oxygen burner can be reduced, and the furnace can be easily downsized without the oxygen burner being bulky. When the flame detection device located at the base end of the fuel gas passage is configured to detect the combustion of the air-fuel mixture supplied into the fuel gas passage, the burner nozzle can be attached to the furnace wall only. The combustion of the air-fuel mixture can be detected without installing a flame detection device separately from the burner nozzle on the furnace wall.

When the flame detection device detects combustion of the air-fuel mixture supplied into the fuel gas passage, the oxygen on-off valve and the fuel gas on-off valve are opened and the air-fuel mixture on-off valve is closed. When configured to operate, the fuel gas and oxygen gas may jet into the furnace before the mixture gas from the ignition gas passage to the fuel gas passage burns, or the fuel gas may burn in the furnace. Nevertheless, the combustion of the air-fuel mixture from the ignition gas passage to the fuel gas passage is prevented from continuing. This prevents waste of combustion gas and oxygen gas.

[0012]

【Example】

 An embodiment of the oxygen burner of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 is a vertical sectional view of the oxygen burner, and FIG. 2 is a schematic configuration diagram showing a gas pipe and a control system of the oxygen burner.

In this oxygen burner, the burner nozzle 1 is formed as an inner and outer double cylinder, and the tip portion [the left side in FIG. 1] of the burner nozzle 1 is projected into a furnace 20 such as a melting furnace or an incinerator. It is attached to the furnace wall 21 in a state. That is, the fuel gas passage 3 is formed in the inner cylinder 2 of the burner nozzle 1, and the oxygen passage 5 is formed in the space between the inner cylinder 2 and the outer cylinder 4 of the burner nozzle 1. These fuel gas passage 3 and oxygen passage 5 are communicated with the inside of the furnace 20 through openings 3a and 5a formed in the tip wall 1a of the burner nozzle 1.

An ignition gas pipe (ignition gas passage) 6 is inserted into the oxygen passage 5, and the tip of the ignition gas pipe 6 is connected to the tip of the fuel gas passage 3 [in FIG. 1]. It is connected to the left side]. A spark plug (ignition device) 7 is provided at the connection between the ignition gas pipe 6 and the fuel gas passage 3.

A flame detection device 8 is provided at the base end portion of the fuel gas passage 3 outside the furnace [on the right side in FIG. 1]. The flame detection device 8 detects an ignition pilot flame that burns at the tip of the fuel gas passage 3 through a space inside the fuel gas passage 3, and also supplies a fuel gas supply source 16 through a solenoid valve 11 described later. The flame due to the combustion of the fuel gas supplied from the inside to the fuel gas passage 3 is detected.

As described above, the ignition gas pipe 6 is arranged in the burner nozzle 1, and the flame detection device 8 is arranged at the base end portion of the burner nozzle 1 outside the furnace. Compared to the case where the flame detection device 8 and the burner nozzle 1 are separately arranged in the furnace 20, the oxygen burner is compact and can be easily attached to the furnace wall 21, and the space for arranging the oxygen burner can be reduced. .

The fuel gas passage 3 is connected to a fuel gas supply source 16 via a solenoid valve (fuel gas opening / closing valve) 11, and the oxygen passage 5 is connected to a solenoid valve (oxygen opening / closing valve) 12. Connected to an oxygen source 17. On the other hand, the ignition gas pipe 6 is connected to the fuel gas supply source 16 and the air supply source 18 via solenoid valves (mixture mixture opening / closing valve) 13 and 14, and in a state where the fuel gas and air are mixed. It flows through the ignition gas pipe 6. A liquefied gas fuel such as liquefied petroleum gas or liquefied natural gas is applied to the fuel gas.

The solenoid valves 11 to 14 are connected to a control device (control means) 9, and the control device 9 is connected to a flame detection device 8 and an ignition plug 7. The ignition plug 7 generates sparks by, for example, electric discharge, and the sparks ignite the air-fuel mixture flowing from the ignition gas pipe 6 into the fuel gas passage 3. Then, the control device 9 controls the operation of the ignition plug 7 and the opening / closing operation of the solenoid valves 11 to 14 according to the flame detection result by the flame detection device 8.

The opening 5a of the oxygen passage 5 is formed so as to surround the opening 3a of the fuel gas passage 3 and is formed so as to be inclined toward the opening 3a. As a result, oxygen gas is ejected from the opening 5a of the oxygen passage 5 toward the fuel gas ejected from the opening 3a of the fuel gas passage 3, and the mixing of the fuel gas and the oxygen gas in the furnace 20 is promoted. It

Next, the operation of the oxygen burner having the above structure will be described. First, the control device 9 closes the solenoid valves 11 and 12, and opens the solenoid valves 13 and 14 to supply the fuel gas and air to the ignition gas pipe 6. Further, the spark plug 7 is operated by the control device 9.

Then, the fuel gas and air flow in the ignition gas pipe 6 while being mixed, and are ignited by the ignition plug 7 at the connecting portion between the ignition gas pipe 6 and the fuel gas passage 3. As a result, the air-fuel mixture from the ignition gas pipe 6 burns in the fuel gas passage 3 as a pilot fire.

When the occurrence of this kind of fire is detected by the flame detection device 8, the solenoid valves 11 and 12 are opened by the control device 9 so that the fuel gas is supplied into the fuel gas passage 3 and the oxygen passage Oxygen gas is supplied to the inside of the container 5. Further, the operation of the spark plug 7 is stopped.

That is, when the pilot fire in the fuel gas passage 3 is detected by the flame detection device 8, the supply of the fuel gas and the oxygen gas to the fuel gas passage 3 and the oxygen passage 5 is automatically started. It is possible to prevent the fuel gas and the oxygen gas from being jetted into the furnace 20 before the ignition of the pilot fire and prevent the combustion gas and the oxygen gas from being wasted.

Then, the fuel gas supplied into the fuel gas passage 3 is mixed with the oxygen gas ejected into the furnace 20 and ejected from the oxygen passage 5 while the fuel gas is introduced into the fuel gas passage 3. A part of the supplied fuel gas is mixed with air contained in the air-fuel mixture from the ignition gas passage 6 and burned in the fuel gas passage 3 by the seed flame, and becomes a flame together with the seed flame to form a flame in the furnace. Erupt to 20. Then, the fuel gas jetted into the furnace 20 is ignited by the flame and burned.

On the other hand, when the flame detection device 8 detects the flame due to the combustion of the fuel gas supplied into the fuel gas passage 3, the control device 9 closes the solenoid valves 13 and 14 to ignite the fuel gas. The supply of fuel gas and air to the gas pipe 6 is stopped, and the pilot fire is extinguished. That is, when the fuel gas supplied into the fuel gas passage 3 is burned by the pilot fire and this flame is detected by the flame detection device 8, the pilot flame is automatically extinguished, so that the inside of the furnace 20 It prevents the burning of the fuel gas even though it has already burned, and the waste of combustion gas and oxygen gas.

The above embodiment can be modified as follows. That is, the position where the tip of the ignition gas passage 6 is connected to the fuel gas passage 3 is not limited to the tip portion of the fuel gas passage 3, but may be the middle portion or the base portion of the fuel gas passage 3. Good.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of an oxygen burner of the present invention.

FIG. 2 is a schematic configuration diagram showing a gas pipe and a control system of the oxygen burner.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Burner nozzle, 2 ... Burner nozzle inner cylinder, 3 ... Fuel gas passage, 4 ... Burner nozzle outer cylinder, 5 ... Oxygen passage, 6
... ignition gas pipe (ignition gas passage), 7 ... spark plug (ignition device), 8 ... flame detection device, 11 ... solenoid valve (fuel gas opening / closing valve), 12 ... solenoid valve (oxygen opening / closing valve), 13 ... 14 ... Electromagnetic valve (mixture open / close valve), 16 ... Fuel gas supply source, 17 ... Oxygen supply source.

Claims (3)

[Scope of utility model registration request] 1. The burner nozzle (1) is formed of an inner and outer double cylinder, and a fuel gas passage (3) is formed in the inner cylinder (2) of the burner nozzle (1).
To form a fuel gas supply source (1
6) is connected to form an oxygen passageway (5) in a space between the inner cylinder (2) and the outer cylinder (4) of the burner nozzle (1), and an oxygen supply source is provided in the oxygen passageway (5). In the oxygen burner to which (17) is connected, an ignition gas passage (6) for passing a mixture of fuel gas and air is provided in the oxygen passage (5), and the tip of the ignition gas passage (6) is An oxygen burner characterized by being connected to the fuel gas passage (3) and provided with an ignition device (7) at a connecting portion between the ignition gas passage (6) and the fuel gas passage (3). . 2. The oxygen burner according to claim 1, wherein a flame detection device (8) is arranged at a base end portion of the fuel gas passage (3), and the ignition gas passage is provided by the flame detection device (8). An oxygen burner characterized by being configured to detect the combustion of the air-fuel mixture supplied from (6) into the fuel gas passage (3). 3. The oxygen burner according to claim 2, wherein an oxygen on-off valve (12) that opens and closes the oxygen passage (5), and a fuel gas on-off valve (11) that opens and closes the fuel gas passage (3). A mixture gas on-off valve (13) (14) for opening and closing the ignition gas passage (6), and a control means (9) for controlling these on-off valves (11) to (14), The detection result of the flame detection device (8) is configured to be output to the control means (9), and the control means (9) supplies the fuel gas passage (3) in the flame detection device (8). When combustion of the air-fuel mixture is detected, the oxygen on-off valve (12) and the fuel gas on-off valve (11)
Open the valve and open / close the mixture opening / closing valves (13) (14)
An oxygen burner, which is configured to close the valve.