CN212929994U - Four-corner tangential pure oxygen flat flame burner - Google Patents

Abstract

The utility model discloses a circle formula pure oxygen flat flame nozzle is cut in four corners belongs to the energy utilization field, including installation piece, gas pipe, whirl chamber, horn tube, whirl structure, air chamber, oxygen interface, No. two air chambers, communicating pipe, oxygen spray tube. The utility model discloses a change the whirl structure of gas export mode and spiral-flow number, promote the horn tube that radial minute speed increases, arrange through letting the oxygen spray tube be the tangent circle in the outside inboard of horn mouth, spun oxygen produces the oxygen whirl, make and lead to the fact negative pressure region on the axis, the resistance of backward flow reduces, thereby the flame core department is flowed back to the high temperature burner gas, and the extrusion is central to the whirl, the design of horn tube also makes the air current attach the wall, and then makes along the radius direction on the gas and the combustion-supporting gas mix more evenly, and then the utility model discloses an utilize the pure oxygen combustion-supporting and then avoid producing nitrogen oxide, and combustion efficiency height avoids the problem that the air combustion-supporting nitrogen carried the heat.

Description

Four-corner tangential pure oxygen flat flame burner

Technical Field

The utility model relates to an energy utilization field, especially a four corners tangential circle formula pure oxygen flat flame nozzle.

Background

With the development of economy and the increase of population, the problems of energy efficient utilization and emission of combustion pollutants are becoming more serious. Since 80% or more of atmospheric pollutants are generated by combustion of fuel, research on efficient and clean combustion has become one of the popular problems at home and abroad. The difference of combustion method and combustion environment also is different to the pollutant content that discharges, and at present, the industrial gas combustion method mainly has flat flame burning and direct flame burning, and flat flame burning is a novel gas combustion apparatus that recent development got up, compares with traditional combustion method and has the heating evenly, characteristics such as heating power reinforce and flame stabilization. The combustion environment also comprises air, pure oxygen and the like, and in the flat flame combustion process, compared with air combustion supporting, the pure oxygen is adopted to replace air combustion supporting, so that the production of thermal NOX can be effectively controlled, high-concentration CO2 in the flue gas can be better collected and utilized, and the heat carried in the flue gas and the tail gas emission are reduced.

Obviously, pure oxygen flat flame combustion achieves the purpose of high efficiency and cleanness, but still has a plurality of technical problems at present, so that the popularization of the pure oxygen flat flame combustion is limited. Such as: the gas reaction is incomplete, and pollutants such as CO, NO and the like are produced; local high temperature causes burning loss of the burner; factors such as the size of a combustion surface, the stability, the size of a combustion area and the like are all places to be improved for the pure oxygen flat flame technology.

The important influence of the pure oxygen flat flame combustion on the burner can directly influence the flow field characteristics of the fuel gas and the combustion-supporting gas, thereby changing the combustion characteristics. The present burner used at home and abroad is mainly a coaxial sleeve type rotational flow flat flame burner, and the design principle is that under the action of a swirler, coal gas and oxygen are strongly rotated, spread along the surface of a furnace wall vertical to the central line of a burner block, and are burnt out in a layer of space next to the furnace wall to form disc-shaped flame. The gas and oxygen sprayed by the burner are in flat flow and have the basic characteristics of a strong rotating jet flow field, so that the velocity field is uneven, the mixing proportion of the gas and the oxygen in each part is different, the diameter of the combustion-supporting gas nozzle relates to a technical contradiction, if the diameter of the nozzle is reduced, the oxygen has higher spraying speed, but local high temperature is caused (the temperature of pure oxygen combustion-supporting flame is high, and the problem of high temperature zone concentration is easily caused). So that the problems of insufficient combustion, generation of pollutants such as CO, NO and the like, flame blackness and the like of the existing flat flame burner generally exist.

A burner is a combustion device which industrially performs a post-combustion function of distributing fuel and combustion-supporting gas and ejecting them in a certain manner. As a flat flame combustion technology generally applied in industry, a burner plays an indispensable role in flat flame combustion, how to improve the existing problems by changing the structure and parameters of the burner, has a vital significance for efficient clean utilization of gas, and has a very important social value in developing novel burner equipment, so that a four-corner tangential pure oxygen flat flame burner for solving the problems proposed in the background technology is needed.

Disclosure of Invention

The utility model aims at solving the problem of proposing in the background art, a four-corner tangent circle type pure oxygen flat flame burner is designed.

The technical scheme of the utility model is that the four-corner tangential pure oxygen flat flame burner comprises an installation block, a gas pipe, a swirl cavity, a horn pipe, a swirl structure, a first air chamber, an oxygen interface, a second air chamber, a communicating pipe and an oxygen spraying pipe, wherein the gas pipe is fixedly arranged on the side surface of the installation block, the swirl cavity is arranged in the middle of the installation block, the horn pipe is fixedly arranged below the installation block and communicated with the swirl cavity, the swirl structure is arranged in the swirl cavity, the first air chamber is sleeved outside the installation block, the oxygen interface is fixedly arranged on one side of the upper surface of the first air chamber and communicated with the inside of the first air chamber, the second air chamber is fixedly sleeved at the lower part of the horn pipe, three communicating pipes are uniformly arranged between the first air chamber and the second air chamber in an annular array manner and are communicated with the first air chamber and the second air chamber, and four oxygen spraying pipes are fixedly arranged inside the second air chamber and extend into the inner side of the outer part, the outlet directions of the four oxygen nozzles are the same clockwise direction, and the outlet directions are tangent to the same circle.

Furthermore, the rotational flow structure comprises a fixed shaft and rotational flow blades, the fixed shaft is fixedly arranged on the upper surface in the rotational flow cavity and extends downwards, and the rotational flow blades are fixedly sleeved outside the fixed shaft.

Furthermore, the swirl vanes are in a swirl fan-blade-shaped structure.

Furthermore, the oxygen nozzle is positioned at the inner side of the outermost end of the flared tube.

Further, the first air chamber and the second air chamber are of hollow annular structures.

The utility model provides a circle formula pure oxygen flat flame nozzle is cut in four corners possesses following beneficial effect, this device is through its structural design, the utilization is through oxygen spray tube position design, four oxygen spray tube pipe tangent circle designs promptly, make the oxygen cyclone form the flow field of well low pressure, compensate the defect that backflow resistance is big in the gas produces the flow field through the whirl structure, make the gathering on the axis follow many high temperature furnace gas, thereby make the gas meet the face effect better, thereby reach the purpose of homogeneous combustion, the peak value of temperature in the combustion process has been reduced.

Because the combustion improver is pure oxygen, N2 can not take away a large amount of heat in the combustion process, the heat efficiency is improved, the combustion temperature and the combustion efficiency are higher, according to element conservation, no N element is added, NOX is hardly generated when natural gas (fuel without N) is combusted, and high-concentration CO2 and H2O are mainly contained in tail gas, so that the collection and utilization of CO2 in the tail gas are facilitated. The carbon emission is reduced on the whole, and the energy is efficiently utilized.

In the metallurgical industry, a large amount of low calorific value fuels such as blast furnace gas, converter gas and the like are generated, and the theoretical combustion temperature is low, so that the low calorific value fuels cannot be independently used in the combustion process of a metallurgical furnace. The theoretical combustion problem of the low-heat-value fuel can be greatly improved by pure oxygen combustion of the burner, and many problems in flat flame combustion are solved by the structural design of the burner, so that the low-heat-value fuel is diversified and clean in use, and a new way is provided for the application of the low-heat-value fuel.

Drawings

FIG. 1 is a schematic structural view of the four-corner tangential pure oxygen flat flame burner of the present invention;

FIG. 2 is a schematic view of the structure of the four-corner tangential pure oxygen flat flame burner of the present invention;

FIG. 3 is a schematic structural view of a cross section taken along line A-A of FIG. 2 according to the present invention;

fig. 4 is a schematic view of the structure of the four-corner tangential pure oxygen flat flame burner of the present invention.

In the figure, 1, a mounting block; 2. a gas pipe; 3. a vortex chamber; 4. a flare tube; 5. a first air chamber; 6. an oxygen interface; 7. a second air chamber; 8. a communicating pipe; 9. an oxygen nozzle; 11. a fixed shaft; 12. and (4) swirl vanes.

Detailed Description

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 work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper/lower end", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "disposed/sleeved," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-4, the present invention provides a technical solution: a four-corner tangential pure oxygen flat flame burner comprises a mounting block 1, a gas pipe 2, a rotational flow cavity 3, a horn pipe 4, a rotational flow structure, a first gas chamber 5, an oxygen interface 6, a second gas chamber 7, communicating pipes 8 and oxygen spray pipes 9, wherein the gas pipe 2 is fixedly arranged on the side surface of the mounting block 1, the rotational flow cavity 3 is arranged in the middle of the mounting block 1, the horn pipe 4 is fixedly arranged below the mounting block 1 and communicated with the rotational flow cavity 3, the rotational flow structure is arranged in the rotational flow cavity 3, the first gas chamber 5 is sleeved outside the mounting block 1, the oxygen interface 6 is fixedly arranged on one side of the upper surface of the first gas chamber 5 and communicated with the inside of the first gas chamber 5, the second gas chamber 7 is fixedly sleeved on the outer lower part of the horn pipe 4, the three communicating pipes 8 are uniformly arranged between the first gas chamber 5 and the second gas chamber 7 in an annular array mode and communicated with the first gas chamber 5 and the second gas chamber 7, the four oxygen spray pipes 9 are fixedly arranged on, the outlet directions of the four oxygen nozzles 9 are the same clockwise direction and are tangent to the same circle.

The utility model discloses in, the whirl structure includes fixed axle 11, whirl blade 12, 11 fixed mounting of fixed axle just downwardly extending on whirl chamber 3 internal upper surface, and whirl blade 12 is fixed suit outside fixed axle 11, and when the gas entered into whirl chamber 3 in, through whirl blade 12 in whirl chamber 3, through the 12 blade shape guide effects of whirl blade on the fixed axle 11, and then make the gas take place rotatoryly, and then when the export mode of rotation type as the gas, its relative area is big and relative stability is even to the temperature distribution is more even.

The utility model discloses in, swirl vane 12 is swirl flabellum column structure, swirl flabellum column structure is heliciform sheet structure, and then gas swirl vane 12 leads the gas when through, and then makes the gas take place to rotate, then outwards discharges.

The utility model discloses in, the oxygen spray tube 9 position is located 4 outermost ends inboards of horn tube, and oxygen and gas mixing speed are extremely fast, and the required big fire plate of flat flame burning, so with the design of oxygen spray tube 9 outside horn tube 4 most suitable.

The utility model discloses in, air chamber 5 and No. two air chambers 7 are hollow annular structure, and then flow equalize through air chamber 5 after admitting air through oxygen interface 6, then lead-in No. two air chambers 7 and then oxygen spout in the comparatively even follow oxygen spray tube 9 through three communicating pipe 8 intercommunication back, wherein, three designs of communicating pipe 8 are convenient for the equipartition of oxygen in No. two air chambers 7.

The utility model discloses in, the figure of a plurality of oxygen spray tubes 9 is four, the export extension line of a plurality of oxygen spray tubes 9 all is tangent with same circle, and above-mentioned extension line mutually perpendicular, the oxygen spray tube 9 that the overcut circle was arranged produces the oxygen whirl for cause the negative pressure zone on the axis, thereby the resistance of backward flow reduces, make the high temperature furnace gas flow back to flame core department again, and the extrusion is in whirl central authorities, also make the air current attach the wall, when making stable combustion, reach the even effect of burning.

The utility model discloses in, horn tube 4 is high temperature resistant material's horn mouth column structure, and then through the radial component velocity increase of horn tube 4 and then promotion gas of above-mentioned horn mouth column structure, and the attaches the wall when the gas mist discharges.

In this embodiment:

the burner can be arranged on the furnace top or the side wall, the distance between the burners is determined according to the process requirement and the specific performance, and can be 1-2 meters generally.

When the burner works, the gas pipe 2 is connected to a gas loop, the oxygen interface 6 is connected to an oxygen loop, then the gas and the oxygen are connected, and the gas in the flared pipe 4 is ignited by using the igniter, so that the burner starts to work;

during operation, gas is discharged from the horn tube 4 after being swirled by the swirling structure in the swirling cavity 3, meanwhile, oxygen enters the first gas chamber 5 through the oxygen interface 6 and is uniformly distributed for the first time, then enters the second gas chamber 7 through the three communicating tubes 8, then oxygen in the second gas chamber 7 is uniformly distributed in the second gas chamber 7 and is discharged through the oxygen spray tube 9, then the oxygen is mixed with the gas in the horn tube 4 and is violently combusted, through the four-tube tangential design of the oxygen spray tube 9, the oxygen cyclone forms a middle-low pressure flow field, the defect that the backflow resistance in the flow field is large when the gas passes through the swirling structure is overcome, so that more high-temperature furnace gas is gathered on the axis, the gas surface attaching effect is better, and the purpose of uniform combustion is achieved, because the gas is attached to the wall on the horn tube 4 and then the gas forms a larger surface, under the cooperation of the oxygen spray tube 9, a larger combustion surface is generated;

the burner is combustion-supporting through the pure oxygen, so that the nitrogen is prevented from participating in combustion reaction, the generation of nitrogen oxide is further avoided, the water and the carbon dioxide which are generated simultaneously are convenient for recovery processing, the combustion-supporting thermal efficiency of the pure oxygen is high, the requirements of the current energy-saving and emission-reducing situation are met, and the burner has great market potential.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation. The use of the phrase "comprising one of the elements does not exclude the presence of other like elements in the process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. A four-corner tangential pure oxygen flat flame burner comprises a mounting block (1), a gas pipe (2), a cyclone cavity (3), a horn pipe (4), a cyclone structure, a first gas chamber (5), an oxygen interface (6), a second gas chamber (7), a communicating pipe (8) and an oxygen spray pipe (9), and is characterized in that the gas pipe (2) is fixedly mounted on the side surface of the mounting block (1), the cyclone cavity (3) is arranged in the middle of the mounting block (1), the horn pipe (4) is fixedly mounted below the mounting block (1) and communicated with the cyclone cavity (3), the cyclone structure is mounted in the cyclone cavity (3), the first gas chamber (5) is mounted outside the mounting block (1) in a sleeved mode, the oxygen interface (6) is fixedly mounted on one side of the upper surface of the first gas chamber (5) and communicated with the inside of the first gas chamber (5), and the second gas chamber (7) is fixedly sleeved on the lower portion of the outside of the horn pipe (4), three communicating pipe (8) are the annular array equipartition and install between air chamber (5) and No. two air chambers (7) and communicate air chamber (5) and No. two air chambers (7), four oxygen spray tube (9) fixed mounting just stretches into horn pipe (4) outside inboard in No. two air chambers (7) inboards, four oxygen spray tube (9) export direction is same hour hand direction and above-mentioned export direction is tangent with same circle.

2. The corner-truncated-circle pure-oxygen flat-flame burner according to claim 1, wherein the swirling structure comprises a fixed shaft (11) and swirling blades (12), the fixed shaft (11) is fixedly installed on the upper inner surface of the swirling cavity (3) and extends downwards, and the swirling blades (12) are fixedly sleeved outside the fixed shaft (11).

3. The corner-tangential pure oxygen flat flame burner according to claim 2, characterized in that the swirl vanes (12) are of a swirl fan-blade-like structure.

4. The flat flame burner with pure oxygen in the form of a truncated circle at four corners as claimed in claim 1, characterized in that the position of the oxygen nozzle (9) is located inside the outermost end of the flare (4).

5. The flat flame burner with pure oxygen in the form of a truncated circle at four corners of claim 1, characterized in that the first air chamber (5) and the second air chamber (7) are hollow ring structures.

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