CN214700672U - Combustor, combustion furnace and flame stabilizing device for combustion equipment - Google Patents

Abstract

The utility model discloses a flame stabilizing device for combustion apparatus to and contain the burning furnace of flame stabilizing device and combustor. The flame stabilizing device comprises a flame generating cylinder and a plurality of flame stabilizing wires arranged in the flame generating cylinder; the flame generating cylinder is cylindrical and comprises a first end and a second end which are oppositely arranged; the first end is provided with a through hole communicated with the flame source channel, and the second end is of a closed structure; the wall of the flame generation tube is provided with a plurality of through holes. The utility model discloses rational in infrastructure, the volume is less, simple structure, simple to operate, manufacturing material is common, has reduced manufacturing cost, can ensure that low heat value blast furnace gas keeps good ignition quality under low temperature and normal atmospheric temperature state, maintains flame combustion stability, and anti external air current interference performance is strong, and the security performance is good.

Description

Combustor, combustion furnace and flame stabilizing device for combustion equipment

Technical Field

The utility model relates to a combustion apparatus field especially relates to a flame stabilizing device, combustor and fire burning furnace for realizing low heat value blast furnace gas stable combustion under the low temperature condition.

Background

Low-heat value gas such as blast furnace gas is a byproduct combustible gas in the blast furnace ironmaking production process. The blast furnace gas comprises 6-12% of carbon dioxide, 28-33% of carbon monoxide, 1-4% of hydrogen, 55-60% of nitrogen, 0.2-0.5% of hydrocarbon and a small amount of sulfur dioxide; the dust concentration is 10-50 g/cubic meter (standard condition), the dust yield is 50kg/t (pig iron) -75kg/t (pig iron) on average, the particle size of the dust is below 500 mu m, and the dust mainly comprises iron, ferrous oxide, alumina, silicon oxide, magnesium oxide and coke powder. The blast furnace gas can be used as self-used gas for metallurgical enterprises, such as heating hot rolled steel ingots, preheating ladles and the like. However, the blast furnace gas has the characteristics of high ignition temperature (about 600 ℃), unstable low-temperature combustion and easy flameout and flameout, and the safety of the blast furnace gas in the combustion process is poor due to poor external interference resistance of the flame, so that the blast furnace gas can not be directly and stably combusted in an open space under normal conditions and can continuously provide a stable heat source for the next process, and the application range of the blast furnace gas is reduced.

At present, compared with the conventional use mode of low-calorific-value blast furnace gas, as shown in fig. 1, a special combustion furnace (such as a boiler, an industrial furnace and the like) with a larger volume and fixed blast furnace gas must be built, when in use, high-calorific-value gas such as blast furnace gas, coke oven gas or natural gas and combustion-supporting air are simultaneously introduced into a combustor 2 through an air inlet 1, the high-calorific-value gas such as the blast furnace gas, the coke oven gas or the natural gas and the combustion-supporting air are mixed in the combustor 2 according to a certain proportion and a certain mixing condition, an ignition device in the combustor 2 ignites the introduced fuel (the mixed gas of the low-calorific-value blast furnace gas, the high-calorific-value gas and the combustion-supporting air), and one part of the introduced fuel (the mixed gas of the low-calorific-value blast furnace gas, the high-value gas and the combustion-supporting air) enters a combustion chamber 3 after being combusted; the combustion chamber 3 is a closed combustion chamber, can resist the negative effects on the combustion of the blast furnace gas in the combustion chamber caused by the external temperature, airflow and the like, supplies heat for subsequent processes after the high-temperature flue gas generated by the combustion of the blast furnace gas in the combustion chamber is used, the high-temperature flue gas is discharged from a high-temperature flue gas port 5, an observation ignition port 4 is generally arranged in the combustion chamber 3, the flame combustion condition is convenient to observe, and the surface of the combustion chamber 3 is covered with a thick refractory lining 6; the traditional combustion furnace has the advantages of complex structure, high manufacturing cost, unstable combustion and poor safety, and is easy to extinguish and release fire under the low-temperature condition.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a combustor, fire burning furnace and be used for combustion apparatus's flame stabilizing device, it is unstable to aim at solving the burning of low heat value coal gas especially blast furnace gas under normal atmospheric temperature and low temperature condition, need rely on independent combustion chamber burning heating mode for the later process energy supply, anti external air current interference performance is poor, the structure is complicated, high in manufacturing cost, and is bulky, and easy flame-out, take off the fire under normal atmospheric temperature and low temperature condition, the burning is unstable, the relatively poor problem of security.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a flame stabilizing device for a combustion device comprises a flame generating cylinder and a plurality of flame stabilizing wires arranged in the flame generating cylinder; the flame generating cylinder is cylindrical and comprises a first end and a second end which are oppositely arranged; the first end is provided with a through hole communicated with the flame source channel, and the second end is of a closed structure; the wall of the flame generation tube is provided with a plurality of through holes.

Preferably, the flame generation cylinder is made of heat-resistant steel, the second end is sealed by an end plate, and the through hole is a circular hole formed in the end face of the first end.

Preferably, the end face of the first end is further provided with a fixing part for fixing the flame holder.

Preferably, the through holes are circular and are uniformly distributed on the wall of the flame generating cylinder and the end plate.

Preferably, the flame stabilizing wire is an iron wire or a stainless steel wire.

Preferably, the plurality of flame holding wires are interwoven into a mesh shape within the flame generating barrel.

The utility model also provides a combustor, including intake pipe, some firearm and flame nozzle, still include as above arbitrary the flame holding device, the flame holding device passes through the fixed part with in the combustor the flame nozzle is fixed.

The utility model also provides a combustion furnace, which comprises a combustion chamber body, an ignition hole arranged on the combustion chamber body, a burner and a flame stabilizing device as described above; the combustion chamber body comprises a side wall and a combustion chamber formed by surrounding the side wall, and the ignition hole is formed in the side wall; the flame generating cylinder is fixed at the ignition hole on the inner side of the side wall through the fixing part; the combustor includes intake pipe, some firearm and flame nozzle, the intake pipe set up in the outside of combustion chamber body, the flame nozzle stretch into and be fixed in it is downthehole to ignite, the opening of flame stabilizing device with the flame nozzle is linked together.

Preferably, the inner side of the side wall is covered with an inner lining, and the inner lining is made of refractory materials.

Preferably, the burner is a portable burner.

The unique flame stabilizing wire and the flame generating cylinder of the utility model can keep a continuous high temperature state in the blow-in stage, and other high-heat value coal gas does not need to be added, and the flame stabilizing wire and the flame generating cylinder are mixed to improve the heat value and then are used; meanwhile, the structure of the flame generating cylinder can play a stabilizing role in burning flame, reduce airflow disturbance from the adjustment of air and gas flow in a burner or the adjustment of high-temperature flue gas parameters in the next process, is not easy to extinguish and extinguish, can directly and stably burn and continuously provide a stable heat source for the next process, and solves the problems of high ignition temperature and poor ignition performance of low-heat-value gas, particularly low-heat-value blast furnace gas, during ignition and combustion; simultaneously, still simplified burning heating equipment, reduced product equipment's volume, simple structure, simple to operate, manufacturing material is comparatively common, has reduced manufacturing cost widely, and can make portable burning furnace that fires, widened the utility model discloses the audience scope of product.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic view of a prior art burner configuration;

fig. 2 is a schematic structural diagram of a flame holding device for a combustion apparatus according to an embodiment of the present invention;

fig. 3 is a schematic view of a burner according to an embodiment of the present invention;

wherein: 1-an air inlet; 2-a burner; 3-a combustion chamber; 4-observing the ignition port; 5-high temperature flue gas port; 6-refractory lining; 11-a flame nozzle; 12-an igniter; 13-an air inlet pipe; 14-a burner; 15-lining; 16-a side wall; 17-high temperature flue gas port; 18-a combustion chamber; 19-a combustion chamber body; 20-a viewing port; 21-a fixed part; 22-ignition hole; 23-a through hole; 24-a flame generating cylinder; 25-flame stabilizing filaments; 26-a second end; 27-a first end; 271-port.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 2 and 3, there are shown schematic structural diagrams of a flame stabilizer and a combustion furnace for a combustion apparatus according to an embodiment of the present invention. It should be understood that fig. 2 is only used to illustrate the structure example of the present embodiment, and is not the only limitation of the present invention.

The flame holding device of the present invention, as shown in fig. 2 and 3, is used in cooperation with a common burner 14.

The flame stabilizing device comprises a flame generating cylinder 24 and a plurality of flame stabilizing wires 25 arranged in the flame generating cylinder 24; the flame generating cylinder 24 is cylindrical and comprises a first end 27 and a second end 26 which are oppositely arranged; the first end 27 is provided with a through hole 271 communicated with a flame source channel, namely the flame nozzle 11, and the second end 26 is of a closed structure; the wall of the flame generating tube 24 is provided with a plurality of through holes 23.

The porous structure of the flame generating cylinder 24 can form a relatively stable gas combustion space, can overcome the problems of easy flameout and flameout when the airflow from the adjustment of air and gas flow in the combustor 14 or the adjustment of high-temperature flue gas parameters by the next process is disturbed, reduces the airflow disturbance caused by the opening of the observation hole of the combustion chamber, has strong external airflow interference resistance and better safety performance, and redundant low-calorific-value gas can pass through the flame generating cylinder to be combusted outside. The flame stabilizing wire 25 can play a certain role in stabilizing flame and provide a continuous high-temperature glowing surface, and the low-heat value blast furnace gas is used without adding other high-heat value gas into the combustor 14 in a normal-temperature or low-temperature environment to improve the heat value and directly provide a uniform and stable heat source for the next procedure.

Preferably, the flame generating cylinder is made of heat-resistant steel, the second end 26 is sealed by an end plate, and the through hole 23 is a circular hole formed in the end face of the first end 27.

Preferably, a fixing part 21 for fixing the flame holder is further arranged on the end surface of the first end 27; the fixing portion 21 may be a fixing and mounting part such as a buckle, a screw hole, a fixing pin, etc. for combining the flame generating cylinder 24 and the burner 14 or the burner wall into an integral component according to the actual production requirement, thereby reducing the manufacturing process of the whole device, improving the production efficiency and reducing the manufacturing cost.

Preferably, the through holes 23 are circular holes and are uniformly distributed on the side wall of the flame generating cylinder 24 and the end plate of the second end 26, so that the combustion flame uniformly passes through the flame generating cylinder 24, and the function of the flame stabilizing device is further improved.

Preferably, the flame holding wires 25 are iron or stainless steel wires, and the plurality of flame holding wires 25 may be interwoven into a net shape in the flame generating cylinder 4, or may be independently and uniformly distributed in strips in the flame generating cylinder 24. For example, the flame holding filaments 25 may be interlaced in a mesh shape in the same plane, or may be interlaced in different planes. The flame holding filaments 25 are uniformly or interwoven into a mesh structure to uniformly provide a continuous high temperature hot surface.

Referring to fig. 2 and 3, a combustion furnace using the flame stabilizing device according to an embodiment of the present invention is shown. The combustion furnace comprises a combustion chamber body 19, an ignition hole 22 formed in the combustion chamber body 19, and a burner 14, wherein the combustion chamber body 19 comprises a side wall 16 and a combustion chamber 18 formed by the side wall 16 in a surrounding mode, and the ignition hole 22 is formed in the side wall 16; the flame generating tube 24 is fixed at the position of the ignition hole 22 on the inner side of the side wall 16 through the fixing part 21; the combustor 14 comprises an air inlet pipe 13, an igniter 12 and a flame nozzle 11, wherein the air inlet pipe 13 is arranged on the outer side of the combustion chamber body 19, the flame nozzle 11 extends into and is fixed in the ignition hole 22, and a through hole 271 of the flame stabilizing device is communicated with the flame nozzle 11.

Preferably, the inboard of lateral wall coats and is stamped inside lining 15, inside lining 15 can be refractory materials such as firebrick brickwork, indefinite form refractory material (mainly refractory castable, fire-resistant spray coating, fire-resistant ramming mass), thermal-insulated ceramic fibre refractory material, has good thermal-insulated and heat-resisting effect.

Preferably, the combustion furnace is a portable combustion furnace, and the size of the combustion furnace can be adjusted and changed according to actual production requirements.

Specifically, the burner 14 is a heat source of the whole device, when in use, low-calorific-value gas such as blast furnace gas and combustion-supporting air are introduced into the burner 14 through the gas inlet pipe 13, and are mixed in the burner 14 according to a certain proportion and a certain mixing condition, and the introduced fuel (mixed gas of the low-calorific-value blast furnace gas and the combustion-supporting air) is sprayed out and then combusted by the flame nozzle 11 in the burner 14; one part of the flame generated by the burner 14 enters the flame generating cylinder 24 and is stably combusted in the flame generating cylinder 24, the flame stabilizing wire 25 is arranged in the flame generating cylinder 24, the flame stabilizing wire 25 provides a continuous high-temperature glowing surface, the problems of high ignition temperature and poor ignition performance of low-heat-value blast furnace gas are solved, the stable combustion of the low-heat-value blast furnace gas is ensured, and the other part of the flame passes through the through holes 23 on the cylinder wall of the flame generating cylinder 24 and the end head seal plate and is combusted outside. The porous structure of the flame generating cylinder 24 forms a relatively stable gas combustion space, so that the adverse effect of external airflow change and temperature change on combustion can be overcome, and redundant gas can penetrate through the flame generating cylinder to be combusted outside; by the embodiment, the stable combustion of the low-calorific-value blast furnace gas at normal temperature or low temperature can be realized, and the low-calorific-value blast furnace gas has good capacity of resisting external airflow interference; the burner 14 and the flame generating tube 24 can be assembled or assembled as a single unit according to actual production requirements, and the inner liner 15 can be arranged between the burner 14 and the flame generating tube 24 for separation according to the heating or structural requirements of the equipment.

The invention also provides a burner 14, wherein the burner 14 comprises an air inlet pipe 13, an igniter 12 and a flame nozzle 11 which are arranged in a common burner; the flame stabilizing device is fixed with the flame nozzle 11 in the combustor 14 into a whole through the fixing part 21, the combustor additionally provided with the flame stabilizing device can play a role in maintaining stable combustion of materials and also can play a role in continuously providing a uniform and stable heat source in the next process, and is convenient to mount and carry. In a specific case, the burner with the flame holder does not need the combustion chamber 18, and can be used independently in an open space.

To sum up, the burner, the combustion furnace and the flame stabilizing device for the combustion equipment in the embodiment of the utility model cancel the traditional combustion heat supply mode depending on an independent closed combustion chamber to ensure the high temperature state and stable combustion of low heat value gas, in particular low heat value blast furnace gas, simplify the combustion heat supply equipment, reduce the volume of product equipment, have simple structure, convenient installation, common manufacturing materials, greatly reduce the manufacturing cost, and can be made into a portable combustion furnace, but also can be arranged in the combustor 14 and the combustion furnace, thereby widening the audience range of the product of the utility model, having unique structure of the embodiment, the stable combustion of the low-heat-value blast furnace gas under the normal temperature or low temperature condition can be realized, the combustion stability and the combustion safety of the low-heat-value blast furnace gas in combustion equipment are improved, and the low-heat-value blast furnace gas has good capacity of resisting external airflow interference.

The above is only the preferred embodiment of the present invention, and not the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings or the direct or indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims (9)

1. A flame stabilizing device for a combustion device is characterized by comprising a flame generating cylinder and a plurality of flame stabilizing wires arranged in the flame generating cylinder; the flame generating cylinder is cylindrical and comprises a first end and a second end which are oppositely arranged; the first end is provided with a through hole communicated with the flame source channel, and the second end is of a closed structure; the flame generating tube is characterized in that a plurality of through holes are formed in the wall of the flame generating tube, and a fixing part for fixing the flame stabilizing device is further arranged on the end face of the first end.

2. The flame holder for a combustion device of claim 1, wherein the flame generating cylinder is made of heat-resistant steel, the second end is sealed by an end plate, and the through hole is a circular hole formed in the end face of the first end.

3. A flame holding device for a combustion apparatus as claimed in claim 2, wherein the through holes are circular and evenly distributed over the wall of the flame generating cylinder and the end plate.

4. A flame holding device for a combustion apparatus as claimed in claim 1, wherein the flame holding wire is an iron wire or a stainless steel wire.

5. A flame holding device for a combustion apparatus as claimed in claim 1, wherein the plurality of flame holding wires are interwoven in a mesh within the flame generating barrel.

6. A burner comprising an inlet pipe, an igniter and a flame nozzle, characterized by further comprising a flame holder as defined in any one of claims 1 to 5, said flame holder being fixed to said flame nozzle in said burner by said fixing portion.

7. A combustion furnace comprising a combustion chamber body, a firing hole provided in said combustion chamber body, and a burner, characterized by further comprising flame holding means as defined in any one of claims 1 to 5; the combustion chamber body comprises a side wall and a combustion chamber formed by surrounding the side wall, and the ignition hole is formed in the side wall; the flame generating cylinder is fixed at the ignition hole on the inner side of the side wall through the fixing part; the combustor includes intake pipe, some firearm and flame nozzle, the intake pipe set up in the outside of combustion chamber body, the flame nozzle stretch into and be fixed in it is downthehole to ignite, the opening of flame stabilizing device with the flame nozzle is linked together.

8. The furnace of claim 7, wherein the sidewalls are lined on the inside with an inner lining, the inner lining being a refractory material.

9. Furnace according to any of claims 7-8, characterized in that the furnace is a portable furnace.

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