KR20020002036A - Burner for annealing furnace - Google Patents

Abstract

PURPOSE: A burner for an annealing furnace is provided in which an air distribution part increasing mixing efficiency of gas and air is integrated with a heat source storage part storing a heat source in front of the air distribution part so as to improve combustion efficiency of a main burner for the annealing furnace heat treating a cold steel sheet. CONSTITUTION: The burner for an annealing furnace comprises an air distribution part(10) which is equipped with an air distribution tube(20) having air suction holes(22) formed along the rear circumference and plural air distribution holes(24a,24b) formed on projection parts of the outer and inner parts, wherein a main burner pipe(30) and an auxiliary burner pipe(40) are inserted into the inner side of the air distribution tube(20); a burner nozzle part which is integrally connected to a main burner(30) at the inner side of the front part of the air distribution tube(20), and which is equipped with a flame holder(54), wherein plural gas discharging holes(52a,52b) discharging a gas are formed at the outer part and the front part of the flame holder(54); and a heat source storage part(60) which is equipped with a storage tube(70) consisting of inner and outer pipes, wherein the storage tube(70) is installed in front of a connection part(72) screw linked to the center of the flame holder(54), a storage column(78) is laterally installed inside the inner pipe, plural storage pins(78a) storing a heat source are formed on the outer circumferential surface of the storage column(78), and a waveform flame distribution pipe(80) is installed between the inner and outer pipes.

Description

Annealing Furnace Burner Device {BURNER FOR ANNEALING FURNACE}

The present invention relates to a main burner installed in the annealing furnace to perform a heat treatment of the cold rolled steel sheet through the annealing furnace, and more particularly, to improve combustion efficiency of the main burner for annealing furnace heat treatment of the cold rolled steel sheet. It relates to a hand-furnace furnace burner device which comprises an air distribution unit and a heat source storage unit equipped with an air distribution unit for increasing the mixing efficiency and a heat source storage unit for storing the heat source in front thereof.

In general, the annealing furnace that performs heat treatment of cold-rolled steel sheet using radiant heat is the core equipment of steel sheet manufacturing to determine the material of the metal. Such annealing furnace recrystallizes and grows the rolled structure by heating the steel. And the annealing furnace is heated to a predetermined temperature in accordance with the carbon component and the added element to cool and remove the internal stress of the steel. It is to make the material of the metal that you want to demand.

In addition, the annealing furnace as described above, a preheating furnace for removing the rolling oil and foreign matter on the surface of the steel sheet, a heating table for heating the steel sheet, a cracking table for maintaining a constant temperature of the heated steel sheet, a slow cooling table for gradually cooling the steel sheet, and a steel sheet It is composed of a period of exaggeration and finally a quench to prevent aging.

In this case, the heating tube and the cracking zone are combined to be called a radiant tube section (RTS). The main component of the radiant tube section is to ignite the main burner and the main burner, which supply heat by mixing combustion gas and air. It consists of a radiant tube that transfers heat to the steel plate by the convection and radiation of the waste gas burned by the auxiliary burner and the pilot burner.

In addition, the main burner is ignited by the auxiliary burner, and the air and gas supplied during combustion are mixed around the main flame sprayer (MIXING) to combust the combustion, and the combusted waste gas is transported to the atmosphere through a designated suction duct. It is important to ensure that the gas and air are combusted in a completely mixed state in order to ensure heat for continuous operation.

The conventional annealing furnace burner device related to this technique is shown in FIG.

That is, as shown in FIG. 1, the main burner 100 is ignited by using the auxiliary burner 110 as an ignition source, and the flame unit 130 in which the combustion air and the gas in the radiant tube 120 meet and form a flame. Radiant heat of the radiant tube 120 is transmitted to the steel sheet (S) through the annealing furnace in the heat of the flame (F) burned around.

In addition, the air to be supplied is preheated at about 350-400 ° C. at an atmospheric temperature through one exchanger 140 of the radiant tube 120, and is supplied to the main burner 100, and the incoming combustion gas G is air. It is regulated according to the flow rate.

However, in the conventional burner main burner as described above, when air (A) and gas (G) are introduced through each of the suction pipes (150a) and (150b), the waste gas discharge pressure is rapidly passed to the rear end through the combustion system. As the combustion takes place, the combustion takes place before the air and gas are completely mixed so that the air and gas are discharged without supplying a sufficient heat source, which leads to secondary combustion in the surrounding duct equipment. To induce,

Therefore, the bellows portion 160 that connects the pipe portion or the air is not completely mixed with the gas is not made due to the environmental pollution problem due to CO gas which is quite harmful to the human body.

In addition, it becomes difficult to supply sufficient heat source of the main burner 100, as well as the heat amount of the annealing furnace itself decreases, so that the annealing work of the steel becomes poor, in particular, the duct and piping connections are damaged due to incomplete combustion and secondary combustion. There were several problems, such as being.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. The object of the present invention is to achieve a complete mixing of air and gas in an annealing furnace burner and to store heat sources in front of the burner through which combustion gases pass. In order to improve productivity by supplying sufficient heat during annealing, the efficient mixing of gas and air prevents the generation of CO gas harmful to the human body and damage to the peripheral equipment such as duct and bellows pipe by secondary combustion. It is to provide an annealing furnace burner device that blocks the production of combustion inhibitors, ie unburned deposits.

1 is a schematic perspective view showing a burner structure of a conventional annealing furnace

Figure 2 is an overall configuration showing an annealing furnace burner device according to the present invention

Figure 3 is a partial cutaway perspective view showing the air distribution of the present invention annealing furnace burner device

4 is a perspective view showing a nozzle unit and a heat source storage unit of the present invention annealing furnace burner apparatus;

Figure 5 is a front view showing a heat source storage unit of the present invention annealing furnace burner device

Explanation of symbols on the main parts of the drawings

1 .... annealing furnace burner unit 2 .... radiant tube

10 .... Air Distribution 20 .... Air Distribution Tube

22 .. Air suction hole 24 .... Air distribution hole

30 .... main burner tube 40 .... auxiliary burner tube

50 ... burner nozzle 52.

54 .... Inflammator 60 .... Heat Source Storage

70 .... Storage tube 74,76 .... Inner and outer

78 .... Storage post 78a .... Storage pin

80 .... heat source distribution pipe

As a technical configuration for achieving the above object, the present invention includes an air distribution tube having an air intake hole formed along the rear circumference and a plurality of air distribution holes formed in the outer and inner protrusions, the air distribution tube An air distribution unit to which the main burner pipe and the auxiliary burner pipe are inserted into the

A burner nozzle part integrally connected to the main burner tube in front of the air distribution tube, and having a flame sprayer having a plurality of gas discharge holes for discharging gas at the outside and the front;

The inner tube has a storage tube made of an inner and an outer tube which is installed in front of the connection portion screwed to the center of the flame reinforcement, the storage column is formed in the inner tube is formed with a plurality of storage fins for storing a heat source on the outer peripheral surface, By providing an annealing furnace burner device configured as a heat source storage unit in which the corrugated flame distribution pipe is installed between the exteriors.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

2 is an overall configuration diagram showing an annealing furnace burner device according to the present invention, Figure 3 is a partial cutaway perspective view showing an air distribution of the present invention annealing furnace burner device, Figure 4 is a nozzle of the present invention annealing furnace burner apparatus 5 is a perspective view of the heat source storage unit, and FIG. 5 is a front view illustrating the heat source storage unit of the annealing furnace burner apparatus of the present invention.

Figure 2 shows the overall configuration of the annealing furnace burner device 1 of the present invention, such a burner device 1 of the present invention is largely located in front of the air distribution portion 10 to facilitate the distribution of air and the front The burner nozzle unit 50 is divided into a heat source base unit 60 for storing a heat source of the combustion flame applied from the burner nozzle unit 50, which will be described in detail below.

First, the air distribution unit 10 is shown in FIGS. 2 and 3, and the air distribution unit 10 protrudes out of the annealing furnace partition wall to the inside of the radial tube 2. It is provided with an air distribution tube 20, the air distribution tube 20 is formed in a cylindrical shape which is fixed as a fixed ring 26 formed integrally in the outer center in the annealing furnace radial tube (2) Although not shown in detail in the drawings, the air distribution tube 20 is firmly fixed to the end of the radial tube 2 by using a separate fixture.

In addition, the air distribution tube 20 is formed with an air suction hole 22 formed along the rear circumferential surface thereof and a plurality of air distribution holes 24 formed in the outer and inner protrusions 28. A plurality of air suction holes 22 are formed through the tube 20 at one end of the circumference, and a burner hole 40a into which the auxiliary burner tube 40 is inserted is mounted inside the air distribution tube 20. It is formed integrally.

Meanwhile, the plurality of air distribution holes 24 are formed through the first air distribution holes 24a formed in the circumferential direction along the fixing ring 26 and the protrusions 28 formed inside the tube 20. It is formed as a second air distribution hole (24b), the air flows in the center of the air distribution tube 20, the main hole 32 is inserted into the main burner tube 30 through the radial tube (2) It is integrally formed inside the tube 20.

Next, the burner nozzle part 50 is illustrated in FIGS. 2 and 4, and the burner nozzle part 50 is integrally connected to the main burner tube 30 in front of the air distribution tube 20. In addition, the outer and front side is provided with an insulator 54 which is formed with a plurality of gas discharge holes 52 for discharging gas.

On the other hand, the gas discharge hole 52 of the burner nozzle part 50 is the first and second gas discharge holes 52a and 52b which are integrally penetrated toward the outer circumferential surface and the front surface of the flame sprayer 54. The discharge holes 52 are configured to communicate with the main burner pipe 30 connected to the injector 54.

Next, FIGS. 2, 4, and 5 illustrate the heat source storage part 60, and the inner and outer parts 74 installed in front of the connection part 72 screwed to the center of the inflammator 50. A storage column 80 having a storage tube 70 made of 76 and having a plurality of storage pins 80a for storing a heat source on an outer circumferential surface of the inner tube 74 of the tube 70 is rolled up. A corrugated flame distribution pipe 80 is provided between the inner and outer tubes 74 and 76.

And, the flame distribution pipe 80 of the storage tube 70, the wave outlet (80a) and the wave body (80b) in the longitudinal direction of the storage tube 70 connected in succession to the semicircular shape of the front end of the storage tube (70). Equipped with a portion of the tube, the outer portion of the tube (74) 76 in contact with the pin (80c) is fixed.

Referring to the operation and effects of the present invention made of the above configuration in detail as follows.

As shown in FIGS. 2 to 5, when air is supplied through the connecting pipe 8 connected to the radiant tube 2 protruding through the annealing passage partition wall 4, the air is distributed through the air distribution unit. It is sucked into the air distribution tube 20 through the rear air suction hole 22 of the air distribution tube 20 of (10), and at this time, a part of the air passes through the air distribution tube 20 to the radial tube (2). Is primarily distributed through the first air distribution hole 24a formed along the circumference of the fixing ring 26, and the air through the suction hole 22 of the distribution tube 20 is distributed through the distribution tube ( It is secondarily distributed through the second air distribution hole 24b formed in the inner protrusion 28 of 20).

Therefore, as shown in FIGS. 2 and 3, the supplied air is smoothly distributed to the burner device 1 inside the radiant tube 2 through the first and second distribution holes 24a and 24b. In addition, such a smooth distribution of air is very smooth mixing with the gas through the main burner pipe 30 to be described later.

Next, as shown in FIG. 2, when fuel is supplied through the fuel pipe 9a installed at the rear end of the radiant tube 2, the fuel is connected to the fuel tube 9a and is formed at the protrusion 28 of the air distribution tube 20. A flame for igniting the burner device 1 is generated at the tip of the auxiliary burner tube 40 mounted in the burner hole 40a.

At this time, when the gas is supplied from the gas pipe (9b) installed in the center of the rear end of the radiant tube (2), it is connected to the gas pipe (9b), the air distribution tube (20) inside the radial tube (2) It is supplied through the main burner pipe 30 connected to the center, and at this time is connected to the front end of the main burner pipe 40 and the outer and front of the flame sprayer 54 located inside the front end of the air distribution tube 20 Gas is discharged through the first and second gas discharge holes 52a and 52b which are formed so as to face each other.

Accordingly, the air supplied through the first and second air distribution holes 24a and 24b of the air spray tube 20 is injected from the first and second gas discharge holes 52a and 52b and the beam. The burner device 1 burns smoothly around the base 54 and as a ignition flame from the auxiliary burner tube 40.

That is, the air distributed from the first air distribution hole 24a on the circumferential side of the air distribution tube 20 and the air distributed as the inner second air distribution hole 24b of the air distribution tube 20 are separated from the gas. Make the mixing extremely efficient.

And, as shown in Figures 2 and 4, the combustion of the burner device (1) is started, the combustion flame is generated, the source storage unit 60 is screwed to the connection portion 72 to the flame reinforcement 54 Is applied toward the heat source magnetic field tube 70, wherein the storage fins 78a protruding outward from the storage column 78 integrally extending from the connection portion 72 of the storage tube 70 are applied to the heat source of the applied flame. Will be saved.

At the same time, the flame distribution pipe (80) formed between the inner tube (74) and the outer tube (76) of the storage tube (70) is a flame outlet (80a) and the storage tube connected in series in a half arc shape in front of the storage tube (70). Wave body 80b is provided in the longitudinal direction of 70, and thus, the flame applied is sprayed more uniformly as half arc-shaped flame outlet 80a at its tip while passing through wave body 80b. In this case, as shown in Figure 2, the storage pin (78a) of the storage pin (78a) in the center of the fixing portion (78a ') is formed so that the storage pin (78a) is the inner tube of the storage tube (70) 74) is tightly fixed.

Accordingly, compared to the conventional simple tube nozzle type burner, in the present invention, the air supplied as the air distribution tube 20 is distributed and supplied in various directions to be completely mixed with the gas, and then through the heat source tube 70. The combustion flame is added to the radiant tube 2 more uniformly, thereby maximizing the combustion efficiency of the burner device 1.

As described above, according to the annealing furnace burner device of the present invention, the main burner for the annealing furnace is completely mixed with air, and the heat source is stored in front of the burner through which the combustion gas passes, thereby supplying sufficient heat during the annealing operation. This has the advantage of improving the annealing productivity of the steel.

In addition, the efficient mixing of gas and air reduces the generation of CO gas harmful to the human body, and prevents secondary combustion due to unburned and prevents damage to peripheral equipment such as ducts, connecting pipes and bellows pipes for connecting pipes. At the same time, there is an excellent effect of blocking the production of unburned deposits.

Claims (5)

In the burner apparatus for annealing furnace, An air distribution tube 20 having an air intake hole 22 formed along the rear circumference and a plurality of air distribution holes 24 formed in the outer and inner protrusions, the main body of the air distribution tube 20 An air distribution unit 10 into which the burner pipe 30 and the auxiliary burner pipe 40 are inserted and mounted; And, Integrally connected with the main burner tube 30 to the front and the inside of the air distribution tube 20, the outer and front is provided with a flame gun 54 is formed with a plurality of gas discharge holes 52 for discharging gas Burner nozzle unit 50; And, It has a storage tube 70 of the inner and outer tubes 74, 76 installed in the front of the connection portion 72 screwed to the center of the inflammator 50, the inner tube 74 in the outer peripheral surface A storage column 78 is formed in which a plurality of storage pins 78a for storing a heat source are formed, and a heat source storage unit in which a flame distribution pipe 80 having a waveform is installed between the inner and outer tubes 74 and 76. 60) annealing furnace burner device, characterized in that configured as The air distribution tube (20) of the air distribution unit (10) is fixed as a fixing ring (26) integrally formed at an outer center in the annealing furnace radial tube (2), and an end thereof is ready. Annealing furnace burner device characterized in that it is formed in a cylindrical shape fixed to one end of the unherted tube (2) The air intake hole 22 of the air distribution tube 20, the plurality of air distribution holes 24 are formed through the rear circumference of the air distribution tube 20, the plurality of air distribution holes 24 A plurality of second air distribution holes (24b) formed in the longitudinal direction of the first air distribution hole (24a) formed in the circumferential direction along the fixing ring 26 and the protruding portion (28) formed inside the tube (20). ), The protruding portion 28 is integrally formed with a burner hole 40a into which the auxiliary burner tube 40 inserted through the rear end of the annealing furnace radial tube 2 is inserted, and the center of the air distribution tube 20. An annealing furnace burner device, characterized in that the air flows through the main tube 32 is inserted into the main burner tube 30 through the radial tube (2) is formed The first and second gas ejection holes 52a of claim 1, wherein the gas ejection holes 52 of the burner nozzle part 50 are integrally penetrated to face the outer circumferential surface and the front surface of the flame sprayer 54. An annealing furnace burner device, characterized in that the discharge holes 52 communicate with the main burner pipe 30 connected to the inflammator 54. The flame distribution pipe (80) of the storage tube (70) is a wave in the longitudinal direction of the storage outlet (70a) and the storage tube (70) connected in series with a half arc of the front end of the storage tube (70). The body (80b) is provided in the tube, the outer portion (74, 76) in contact with the pin (80c) is fixed, the middle of the storage pin (78a) of the storage pin (70a) of the storage tube 70 Annealing furnace burner device, characterized in that the fixing portion (78a ') is tightly fixed to the inner tube (74) is formed