KR20020040946A - Main burnner for preventing of flowing backward fire in a direct rired furnace - Google Patents

Abstract

PURPOSE: A main burner of a direct flame furnace is provided to prevent explosion via counterflow of burner flame, low efficiency and heat capacity via unstable mixing, and early wearing via an oxidation of a nozzle tip by improving burner structure. CONSTITUTION: A main burner of a direct flame furnace comprises a body having an air pipe connecting flange(22), a packing(23) bolted to the body, and a gas pipe(24) installed through the body. A regulator(16) and a nozzle tip(17) are fastened to back of the body, and the packing having a packing pad(23c) is bolted to a body hole(21) in front of the body. A coupling portion(24b) with a union flange(24c) is fastened in front of the gas pipe. A screw thread(17d) with a seat(17b) formed thereon is coupled with a screw thread(24a) on back and outer circumferential portion of the gas pipe. In front of the nozzle tip is included a gas blocker, with a spring installed on its middle portion, and an air nozzle hole(17c). The nozzle tip also includes a fireproof materials(17f) back of the nozzle tip.

Description

MAIN BURNNER FOR PREVENTING OF FLOWING BACKWARD FIRE IN A DIRECT RIRED FURNACE}

The present invention is a process for maintaining the surface of the strip in the continuous plating line facility to ensure the plating adhesion as a direct burner main burner to give the heat source to the surface of the strip in the direct furnace, more specifically the strip passing through the furnace. When the heat source is applied to the surface for a long time, the burner defects cause the burner to be replaced by the main burner because of the problems such as low calorie value due to the explosion and instability of the burner flame, unstable mixing, and premature wear due to the oxidation of the nozzle tip. And it is related to the main burner with an efficient high-efficiency flashback prevention fire that improved in order to prevent the inefficient working process is generated.

In general, the main burner is composed of a burner body 10, a gas pipe 13, a packing 11, and the like, as shown in FIG. Since the mixed gas of GAS is passed through the burner and the ignition 15 is made inside the ignition furnace, calorie reduction due to unstable mixing and deterioration of plating adhesion due to instability of the ignition furnace are accompanied, and due to overheating of the burner tip 14 Oxidation and deformation of burner tip causes clogging of shio hose and unstable mixing of air and shio to cause discoloration (staining pattern due to heat deviation) on strip surface. Marking (DENT) phenomenon occurs on the surface of the strip due to foreign substances on the surface of the driving roll driven by the plate, and the plating peeling phenomenon occurs due to the deterioration of the quality and the decrease of the adhesion of the plating. , The risk of a large accident leading to a large explosion in the fire caused by burner backfire, and the nozzle mix (NOZZLE MIX) in the form of a calorie reduction due to unstable mixing of air and shiji and the refractory in the burner is broken and the fragments are driven. Falling to the roll side is a cause of strip breakage and equipment accidents, and also has a number of problems, such as cost loss, reduced productivity and quality degradation, such as the entire burner should be replaced when the burner tip is oxidized.

The present invention has been made in order to solve the above problems, it is an effective nozzle tip and burner main body of the circulation of burner reverse circulation due to calorie reduction and burner tip overheating due to unstable mixing of air and shioji when igniting main burner By inserting refractory to block high temperature of burner tip with improvement, it prevents tip deformation, oxidation, and burner tip mixing with air in the burner tip firstly, and the flame vortex as the flame rotates inside the furnace. It prevents phenomena, secures high heat and stabilizes the surface of the strip by stabilizing air and sioji atmosphere, improves plating adhesion due to stabilization by direct fire, and prevents premature oxidation because only burner tip can be separated and assembled when replacing burners. Problems caused by burner ignition, such as extending burner life by preventing deformation of burner tips The aim is to solve the problem by stabilizing the atmosphere in the stove and eliminating the risk factors caused by the main burner, and improving productivity, quality, cost and stabilization.

In order to achieve the above object, the present invention provides a main burner including a main body having an air pipe connection flange at an upper outer periphery, a packing bolted to a front side of the main body, and a gas pipe installed through the inside of the main body. The main body having a flange on one side of the outer periphery is screwed with the adjuster and the nozzle tip to the rear, and the packing with the packing pad at the front is bolted to the body hole, and the gas pipe has a union flange at the front. It is screwed with the joint, and forms a screw thread on the rear outer circumference and is coupled with the threaded thread of the nozzle tip. The front side of the nozzle tip has a gas circuit breaker with a spring in the center and a gas nozzle on the inner circumference. The air outlet hole is provided outside the center and the seating hole formed in the hole, and the refractory is in the center part at the rear side. And, to a main burner of a backfire preventing direct heat, characterized in that said air nozzle having a hole communicated with the central portion outward.

1 is an exploded perspective view of a conventional burner body;

2 is a cross-sectional view of the main burner according to the present invention;

Figure 3 is an exploded perspective view of the main burner according to the present invention.

Explanation of symbols on the main parts of the drawings

10: finish burner body 11: packing

13 gas pipe 14 burner tip

16: adjuster 17: nozzle tip

17b: seating hole 17c: air nozzle hole

17d: internal thread 17e: gas nozzle hole

17f: (Nozzle Tip) Refractory 20: Burner Body

20c: Flange 21: Body hole

22: air piping connection flange 23: packing

23a: packing hole 23c: packing pad

24: gas pipe 24a: thread

24b: seam 24c: union flange

30: gas circuit breaker 31: spring

Hereinafter, an embodiment of the present invention will be described in more detail with reference to the accompanying drawings.

2 is a cross-sectional view of the main burner according to the present invention, Figure 3 is an exploded perspective view of the main burner according to the present invention. Therefore, it will be described in detail with reference to FIGS.

In order to achieve the above object, the present invention, the burner body 20, the regulator 16, the nozzle tip 17, the gas pipe 24, the packing 23 to the main burner by the individual to enable the exchange The burner body 20 is screwed in the order of the adjuster 16 and the nozzle tip 17 in the nozzle direction, and the packing 23 is coupled to the main body hole 21 toward the gas inlet and the inside thereof. The gas pipe 24 penetrates the burner body 20 for a long time. In addition, the distal end portion of the gas pipe 24 screws the inner circumferential thread 17d formed inside the rear side of the nozzle tip 17 coupled to the regulator 16 and the thread 24a of the gas pipe end. Then, the bolt 23b of the packing 23 is coupled to the bolt hole 21a of the burner body 20, and the packing pad 23c in close contact with the gas pipe 24 prevents air leakage. In addition, the main body 20 and the flange 20c, the flange portion 22 and the packing 23 and the packing pad 23c by welding, the gas pipe 24 and the joint 24b is screwed, union The flange 24c and the joint 24b have a ring-type packing (not shown) inserted therein so that the union can be coupled and tightened.

The rear nozzle tip 17 and the refractory 17f are designed reversely so that they do not fall out once constructed, and the inside of the nozzle tip 17 prevents burner backfire to prevent burner backfire generated from unsafe conditions during ignition. The gas circuit breaker 30 is mounted to the gas circuit breaker seat 17b together with the spring 31 having good elasticity. Accordingly, a large circular radial nozzle hole 17c is formed at the rear side of the nozzle tip 17 outside the refractory 17f at the center, and the seating hole 17b is located at the front side of the nozzle tip, and the gas nozzle hole 17e at the inner circumference of the eyeball. ), And a small circular radial nozzle hole (air) is formed at an upward angle of 15 ° to 45 ° outside the seating hole. The burner in which the nozzle tip 17 is coupled as described above is bolted and fixed to the bolt hole 22b of the line burner block air flange (not shown) and the burner body flange 22, and the line facility gas piping (not shown) Is connected to the gas pipe union flange (24c) to burner ignition.

Hereinafter, with reference to the accompanying drawings will be described in detail the operation of the present invention. Air passing through the air pipe connection flange 22 to the burner that has been combined in the same manner as described above goes out through the air nozzle hole 17c, and Shiji gas passed through the union flange 24c is a gas pipe 24. Through the gas nozzle (17e) through the inner pipe of the air nozzle hole (17c) is automatically mixed with the air to form a flame, the flame is swirled by the high-speed mixing of air and gas in the air nozzle hole (17c) Since it is injected by the shape and the upward angle of the air nozzle hole 17c, it produces high heat and removes foreign substances from the strip and gives a heat source, thereby improving the plating adhesion in the zinc port. In addition, the nozzle tip 17 is designed so that the refractory 17f blocks high heat to prevent nozzle tip oxidation and burner backfire, and the flame exiting from the burner is normally discharged or prevented from backfire. In order to prevent the flame generated from being backfired during the operation, the risk of flame backfire caused by the gas circuit breaker 30 using the elastic principle of the spring 31 is eliminated to prevent the explosion due to the backfire during the operation and to prevent refractory damage due to the explosion of the direct fire It consists of one feature.

According to the present invention, the nozzle tip maximizes the amount of heat caused by the complete mixing of air and shiji and charges refractory to the nozzle tip to prevent overheating of the nozzle tip to prevent oxidation and premature burnout, and to prevent burner backfire, the cause of explosion. The burner configuration can be replaced by parts such as nozzle tip, regulator, burner body, and gas pipe packing, and it is possible to reduce the cost and work efficiency during burner replacement and to prevent the occurrence of large accidents due to refractory damage and to improve the quality. The practical effect which can operate is obtained.

Claims (4)

A main body 20 having an air pipe connection flange 22 on an upper outer periphery, and a packing 23 bolted to a front side of the main body 20; In the main burner composed of a gas pipe 24 installed to penetrate the inside of the body 20, The main body 20 having the flange 20c on one side outer periphery is screwed with the adjuster 16 and the nozzle tip 17 to the rear, and the packing 23 with the packing pad 23c to the front is the main body. Bolted to the hole 21; The gas pipe 24 is screwed with a joint 24b having a union flange 24c in the front, and forms a thread 24a at the rear outer periphery, so that the seating hole 17b of the nozzle tip 17 is formed. Is combined with the formed thread 17d; On the front side of the nozzle tip 17, there is a gas breaker 30 having a spring 31 attached to a central portion thereof, and a seating hole 17b having a gas nozzle hole 17e formed on an inner circumference thereof and an air nozzle hole outside the center portion. 17c), and at the rear side, a refractory (17f) is embedded in the central portion, and the air nozzle hole (17c) formed in communication with the outside of the central portion is formed. The method of claim 1, The main burner of the backfire prevention fire burner, characterized in that the packing pad (23c) for preventing the air leakage is provided inside the packing (23). The method of claim 1, And a nozzle hole (17c) communicating with the nozzle tip (17c) is formed so as to have an upward inclination angle of 15 ° to 45 °. The method of claim 1, Refractory (17f) formed in the center of the rear side of the nozzle tip 17 is a reverse burner main burner, characterized in that the reverse area is constructed.