阅读说明：本技术 一种高速线性烧嘴 (High-speed linear burner ) 是由 张麒麟 陈恪彬 熊昌宇 吴镜 于 2021-06-18 设计创作，主要内容包括：本发明公开了一种高速线性烧嘴,该烧嘴包括燃烧室及与燃烧室导通的空气腔体、燃气腔体,空气腔体和燃气腔体上分别设有空气进口、燃气进口,燃烧室内设有点火棒,所述燃气腔体连接有位于燃烧室内的线性喷头,点火棒延伸至线性喷头内,燃气腔体出口位置处设有多个与线性喷头导通的燃气喷口,所述线性喷头的内腔大小沿烧嘴长度方向渐变式设置,线性喷头侧壁周向设有多个用于空气进入线性喷头内的空气喷口,燃烧室侧面设有火焰出口,火焰出口为缩口式的长方形。本发明出口火焰呈线性长条形,增大了火焰宽度及火焰面积,使得其供热扩散,加热更为均匀,在很多场合下可以实现对钢带/钢板的快速加热。(The invention discloses a high-speed linear burner, which comprises a combustion chamber, an air cavity and a gas cavity, wherein the air cavity and the gas cavity are communicated with the combustion chamber, the air cavity and the gas cavity are respectively provided with an air inlet and a gas inlet, an ignition rod is arranged in the combustion chamber, the gas cavity is connected with a linear nozzle positioned in the combustion chamber, the ignition rod extends into the linear nozzle, the outlet of the gas cavity is provided with a plurality of gas nozzles communicated with the linear nozzle, the size of the inner cavity of the linear nozzle is gradually changed along the length direction of the burner, the side wall of the linear nozzle is circumferentially provided with a plurality of air nozzles for air to enter the linear nozzle, the side surface of the combustion chamber is provided with a flame outlet, and the flame outlet is in the shape of a reduced opening. The flame at the outlet of the invention is linear and long-strip-shaped, thus increasing the flame width and the flame area, leading the heat supply to be diffused and the heating to be more uniform, and realizing the rapid heating of the steel belt/steel plate in many occasions.)

1. A high-speed linear burner comprises a combustion chamber, an air cavity (3) and a gas cavity (8), wherein the air cavity (3) and the gas cavity (8) are communicated with the combustion chamber, the air cavity (3) and the gas cavity (8) are respectively provided with an air inlet (1) and a gas inlet (7), an ignition rod (9) is arranged in the combustion chamber, the high-speed linear burner is characterized in that the gas cavity (8) is connected with a linear sprayer (5) positioned in the combustion chamber, the ignition rod (9) extends into the linear sprayer (5), a plurality of gas nozzles (13) communicated with the linear sprayer (5) are arranged at the outlet position of the gas cavity (8), the size of an inner cavity of the linear sprayer (5) is gradually changed along the length direction of the burner, a plurality of air nozzles (12) used for air to enter the linear sprayer (5) are circumferentially arranged on the side wall of the linear sprayer (5), and a flame outlet (11) is arranged on the side surface of the combustion chamber, the flame outlet (11) is in the shape of a necking rectangle.

2. The high-speed linear burner according to claim 1, wherein the outlet position of the gas cavity (8) is rectangular, a plurality of gas nozzles (13) are positioned on the same straight line, and the gas cavity (8) is connected with the linear nozzle (5) in a sealing and sleeving manner.

3. The high-speed linear burner according to claim 1, wherein the size of the inner cavity of the linear nozzle (5) is gradually increased from left to right, the side wall of the linear nozzle (5) is step-shaped, and the step surface is formed by an inclined surface and a horizontal surface.

4. A high-speed linear burner according to claim 1, characterized in that a matched air uniform plate (2) is vertically arranged in the air cavity (3), a plurality of air holes are uniformly distributed on the air uniform plate (2), the air uniform plate (2) is positioned between the air inlet (1) and the gas cavity (8), and the air uniform plate (1) is circumferentially fixed with the inner wall of the air cavity (3).

5. The high-speed linear burner according to claim 1, wherein a flame monitoring interface (4) is arranged on the burner, one end of the flame monitoring interface (4) located outside the burner is used for connecting flame monitoring equipment, and one end of the flame monitoring interface (4) connected with the sensor is located inside the linear nozzle (5).

6. A high-velocity linear burner according to claim 5, wherein the flame monitoring device is a UV or ion rod.

7. A high-speed linear burner according to claim 1, characterized in that the air chamber (3) and the combustion chamber are rectangular.

8. A high-speed linear burner according to claim 7, characterized in that the combustion chamber is an alloy tube combustion chamber (6), and the alloy tube combustion chamber (6) is hermetically connected with the air cavity (3) in a sleeving manner.

9. A high-speed linear burner according to claim 7, characterized in that the combustion chamber is a burner block combustion chamber (10), and the burner block combustion chamber (10) is connected with the air cavity (3) in a sealing manner through a flange.

Technical Field

The invention relates to the technical field of burners, in particular to a high-speed linear burner.

Background

In our production technology for producing steel parts, some heating technologies for steel strips/plates require high heating speed and uniform heating temperature, and the traditional shaft type burner has the phenomenon of uneven heating easily caused by centralized heat supply due to a small flame surface.

Disclosure of Invention

The invention aims to provide a high-speed linear burner, wherein the flame at the outlet of the burner is linear and long-strip-shaped, so that the width and area of the flame are increased, the heat supply is diffused, the heating is more uniform, and the steel belt/steel plate can be rapidly heated in many occasions.

In order to solve the technical problem, the invention adopts the following scheme:

the utility model provides a high-speed linear nozzle, this nozzle include the combustion chamber and with the air cavity, the gas cavity that the combustion chamber switched on, be equipped with air inlet, gas import on air cavity and the gas cavity respectively, be equipped with the ignition stick in the combustion chamber, the gas cavity is connected with the linear shower nozzle that is located the combustion chamber, and the ignition stick extends to linear shower nozzle in, and gas cavity exit position department is equipped with a plurality of gas spouts that switch on with linear shower nozzle, the inner chamber size of linear shower nozzle sets up along nozzle length direction gradual change formula, and linear shower nozzle lateral wall circumference is equipped with a plurality of air spouts that are used for in the air admission linear shower nozzle, and the combustion chamber side is equipped with flame outlet, and flame outlet is the rectangle of throat formula. In the scheme, combustion-supporting air is blown into the burner from the air inlet, is uniformly sprayed into the air cavity along the width direction of the burner, bypasses from the gap between the upper end and the lower end of the gas cavity to enter the linear nozzle, and then enters the combustion chamber through air nozzles at all levels on the linear nozzle and the space above and below the nozzle; meanwhile, gas enters the gas cavity from the gas inlet, and is uniformly sprayed into the combustion chamber along the width direction of the burner through the gas nozzles on the gas cavity, and the gas entering the combustion chamber is mixed with air entering the combustion chamber in a grading manner. The ignition rod generates high-voltage electric arc under high pressure of a control system to form electric spark, mixed gas of fuel gas/air is ignited, the mixed gas is burnt to release heat, the temperature is raised, the volume is expanded, high-speed airflow is generated after expanding burnt flue gas and part of the mixed gas without burning pass through a combustion chamber and is sprayed out from a flame outlet of the combustion chamber along the width direction of the combustor, high-speed airflow is generated after a necking of the flame outlet is arranged and is sprayed out from a rectangular flame outlet of the combustion chamber along the width direction of the combustor, high-speed linear strip-shaped flame is formed, the flame area and the flame width are enlarged, the heat transfer speed is enhanced, and the direct and rapid heating of strip steel and steel plates is beneficial to uniform heating of the strip steel and the steel plates in the width direction.

Preferably, the outlet position of the gas cavity is rectangular, the plurality of gas nozzles are positioned on the same straight line, and the gas cavity is connected with the linear sprayer in a closed sleeving manner. The gas is ensured to enter the linear nozzle in a dispersing and uniform manner, and the phenomenon of gas concentration at a certain position in the linear nozzle is avoided, so that the gas and the air in the nozzle can be mixed more uniformly.

Preferably, the size of the inner cavity of the linear nozzle is gradually increased from left to right, the side wall of the linear nozzle is step-shaped, and the step surface is composed of an inclined surface and a horizontal surface. The linear nozzle presents a trumpet-shaped diffusion shape, so that air is in a diffusion state inside, the gas/air mixing uniformity is higher, the air and gas are mixed in a grading mode and combusted in a grading mode at the existing nozzle, the NOx emission is effectively reduced, and the ultralow emission of NOx can be realized if a flue gas backflow technology is combined.

Preferably, the air cavity is vertically provided with a matched air uniform plate, the air uniform plate is provided with a plurality of uniformly distributed air holes, the air uniform plate is positioned between the air inlet and the gas cavity, and the air uniform plate is circumferentially fixed with the inner wall of the air cavity. The air uniform velocity plate ensures the uniformity of the passing air velocity and flow, so that the air can uniformly enter the linear spray nozzle to be mixed with the gas after passing through the air uniform velocity plate, and the air is more sufficiently and uniformly mixed with the gas.

Preferably, a flame monitoring interface is arranged on the burner, one end of the flame monitoring interface, which is located outside the burner, is used for connecting flame monitoring equipment, and one end of the flame monitoring interface, which is connected with the sensor, is located inside the linear sprayer.

Preferably, the flame monitoring device is a UV or ion bar. The flame monitoring equipment can carry out continuous flame signal monitoring to the combustion chamber, and the combustion control system ignites and safety control according to the flame monitoring signal of feedback to this nozzle, improves the security of nozzle.

Preferably, the air chamber and the combustion chamber are both rectangular.

Preferably, the combustion chamber is an alloy pipe combustion chamber, and the alloy pipe combustion chamber is hermetically connected with the air cavity in a sleeving manner.

Preferably, the combustion chamber is a burner block combustion chamber, and the burner block combustion chamber is hermetically connected with the air cavity through a flange. The burner can be applied to high-temperature environment, and the highest applicable hearth temperature can reach 1500 ℃ when the firebricks are selected for the combustion chamber.

The invention has the following beneficial effects:

1. the special linear nozzle structure design is adopted to form linear high-speed flame, the flame area is enlarged, the heat transfer speed is enhanced, and the uniform heating in the width direction of the strip steel and the steel plate is facilitated in the direct and rapid heating of the strip steel and the steel plate.

2. The burner can be applied to high-temperature environment, and the highest applicable hearth temperature can reach 1500 ℃ when the firebricks are selected for the combustion chamber.

3. The combustion air and the fuel gas are mixed and combusted in a grading way at the linear nozzle, the NOx emission is effectively reduced, and if the flue gas backflow technology is combined, the ultralow emission of the NOx can be realized.

4. The combustion-supporting air of the burner can be preheated to 450 ℃ at most, and the perfect combination of rapid and uniform heating and heat recovery can be realized.

5. The burner regulation ratio reaches 30: 1

6. The specific burner structure is suitable for gas fuels with various heat values, is flexible to apply, and can be suitable for various application environments with abundant combustion air, air/gas ratio adjustment and excessive gas.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic cross-sectional view of FIG. 1;

FIG. 3 is a schematic top view of the structure of FIG. 1;

FIG. 4 is a schematic view of the structure of a burner block combustion chamber;

FIG. 5 is a schematic cross-sectional view of FIG. 4;

fig. 6 is a schematic top view of the structure of fig. 4.

Reference numerals: the burner comprises the following components, by weight, 1-an air inlet, 2-an air uniform plate, 3-an air cavity, 4-a flame monitoring interface, 5-a linear nozzle, 6-an alloy tube combustion chamber, 7-a gas inlet, 8-a gas cavity, 9-an ignition rod, 10-a burner block combustion chamber, 11-a flame outlet, 12-an air nozzle and 13-a gas nozzle.

Detailed Description

The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited to these examples.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", and the like indicate orientations or positional relationships that are based on the orientations or positional relationships shown in the drawings, or that are conventionally placed when the product of the present invention is used, and are used only for convenience in describing and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "open," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

As shown in fig. 1-4, a high-speed linear burner, this burner includes combustion chamber and the air cavity 3, the gas cavity 8 that switch on with the combustion chamber, and air cavity 3 and combustion chamber are the rectangle, are equipped with air inlet 1, gas inlet 7 on air cavity 3 and the gas cavity 8 respectively, are equipped with ignition bar 9 in the combustion chamber, gas cavity 8 is connected with the linear shower nozzle 5 that is located in the combustion chamber, and ignition bar 9 extends to in the linear shower nozzle 5, and 8 exit positions of gas cavity department is equipped with a plurality of gas spouts 13 that switch on with linear shower nozzle 5, the inner chamber size of linear shower nozzle 5 sets up along nozzle length direction gradient formula, and 5 lateral wall circumference of linear shower nozzle is equipped with a plurality of air spouts 12 that are used for the air to get into in the linear shower nozzle 5, and the combustion chamber lateral surface is equipped with flame export 11, and flame export 11 is the rectangle of throat formula. In the embodiment, combustion-supporting air is blown into the burner from an air inlet (the hollow arrow in fig. 1 and 4 indicates the air flowing direction), the combustion-supporting air is uniformly sprayed into the air cavity 3 along the width direction of the burner, bypasses the gap between the upper end and the lower end of the gas cavity 8 and enters the linear nozzle 5, and then enters the combustion chamber through the air nozzles 12 at all levels on the linear nozzle 5 and the space above and below the nozzle; meanwhile, the gas enters the gas cavity 8 from the gas inlet 7 (the solid arrows in fig. 1 and 4 indicate the flowing direction of the gas), and then is uniformly sprayed into the combustion chamber along the width direction of the burner through the gas nozzles 13 on the gas cavity 8, and the gas entering the combustion chamber is mixed with the air entering the combustion chamber in a grading manner. The ignition rod 9 generates high-voltage electric arc under the high pressure of 6-8kv given by the control system to form electric spark, and ignites the mixed gas of fuel gas/air, the mixed gas is heated up in heat release temperature and expanded in volume, high-speed airflow generated by the expanded combustion flue gas and the part of the mixed gas without combustion passes through the combustion chamber and is ejected out from the flame outlet 11 of the combustion chamber along the width direction of the combustor, and the high-speed airflow generated by the contraction of the flame outlet 11 is ejected out from the rectangular flame outlet 11 of the combustion chamber along the width direction of the combustor to form high-speed linear strip-shaped flame, so that the flame area and the flame width are enlarged, the heat transfer speed is enhanced, and the direct and rapid heating of strip steel and steel plates is beneficial to the uniform heating of the strip steel and the steel plates in the width direction.

Example 2

As shown in fig. 2 and 5, the outlet of the gas cavity 8 is rectangular, the plurality of gas nozzles 13 are located on the same straight line, and the gas cavity 8 is connected with the linear nozzle 5 in a sealed sleeving manner. The gas is ensured to enter the linear nozzle 5 in a dispersed and uniform manner, and the phenomenon of gas concentration at a certain position in the linear nozzle 5 is avoided, so that the gas and the air in the nozzle can be mixed more uniformly.

Example 3

As shown in fig. 1 and 4, the size of the inner cavity of the linear nozzle 5 is gradually increased from left to right, the side wall of the linear nozzle 5 is step-shaped, and the step surface is composed of an inclined surface and a horizontal surface. Air nozzle 12 sets up on the inclined plane of step, and increase step by step along with linear inner chamber, the diameter of air nozzle 12 is also increasing step by step, the volume that can guarantee like this that the air gets into linear shower nozzle 5 increases step by step, realize the hierarchical mixed combustion with the gas, this linear shower nozzle 5 demonstrates the diffusion of tubaeform and appears, make the air also become the diffusion state in inside, gas/air mixing degree of consistency is higher like this, realize that air and gas mix in grades in present shape shower nozzle department, the hierarchical combustion, NOx emission has been reduced effectively, if combining the flue gas reflux technique, can realize NOx's ultralow emission.

Example 4

As shown in fig. 1, a matched air uniform plate is vertically arranged in the air cavity 3, a plurality of uniformly distributed air holes are annularly formed in the air uniform plate, the air uniform plate is located between the air inlet 1 and the fuel gas cavity 8, and the air uniform plate is circumferentially fixed to the inner wall of the air cavity 3. The air uniform velocity plate ensures the uniformity of the passing air velocity and flow, so that the air can uniformly enter the linear spray nozzle 5 to be mixed with the gas after passing through the air uniform velocity plate, and the air is more sufficiently and uniformly mixed with the gas.

Example 4

As shown in fig. 1, a flame monitoring interface 4 is arranged on the burner, one end of the flame monitoring interface 4, which is located outside the burner, is used for connecting flame monitoring equipment, and one end of the flame monitoring interface 4, which is connected with a sensor, is located inside the linear nozzle 5. The flame monitoring device is a UV or ion rod. The flame monitoring equipment can carry out continuous flame signal monitoring to the combustion chamber, and the combustion control system ignites and safety control according to the flame monitoring signal of feedback to this nozzle, improves the security of nozzle.

Example 5

As shown in fig. 1, the combustion chamber is an alloy pipe combustion chamber 6, and the alloy pipe combustion chamber 6 is hermetically connected with the air cavity 3 in a sleeving manner.

Example 6

As shown in fig. 4-6, the combustion chamber is a burner block combustion chamber 10, and the burner block combustion chamber 10 and the air cavity 3 are hermetically connected together through flanges and matching screws. The burner can be applied to high-temperature environment, and the highest applicable hearth temperature can reach 1500 ℃ when the firebricks are selected for the combustion chamber.

The working principle of the invention is as follows: combustion-supporting air is blown into the burner from the air inlet 11, and after passing through the air uniform velocity plate, the combustion-supporting air is uniformly sprayed into the air cavity 3 along the width direction of the burner, bypasses the gap between the upper end and the lower end of the gas cavity 8 and enters the linear nozzle 5, and then enters the combustion chamber through air nozzles 12 at different levels on the linear nozzle 5 and the space above and below the nozzle. Meanwhile, gas enters the gas cavity 8 from the gas inlet 7, and then is uniformly sprayed into the combustion chamber along the width direction of the burner through a row of gas nozzles 13 on the gas cavity 8, and the gas entering the combustion chamber is mixed with air entering the combustion chamber in a grading manner. The ignition rod 9 generates high-voltage electric arc under the high pressure of 6-8Kv given by the control system to form electric spark, mixed gas of fuel gas/air is ignited, the heat release temperature of the mixed gas is increased after combustion, the volume of the mixed gas is expanded, high-speed airflow is generated after the expanded combustion flue gas and the part of the mixed gas which is not combusted pass through a necking part of the combustion chamber, the high-speed airflow is sprayed out from a rectangular flame outlet 11 of the combustion chamber along the width direction of the combustor, high-speed linear flame is formed, meanwhile, the control system carries out continuous flame signal monitoring through flame monitoring equipment (U.V or an ion rod) arranged on a flame monitoring interface 4, and the combustion control system carries out ignition and safety control on the burner according to the fed-back flame monitoring signal.

The foregoing is only a preferred embodiment of the present invention, and the present invention is not limited thereto in any way, and any simple modification, equivalent replacement and improvement made to the above embodiment within the spirit and principle of the present invention still fall within the protection scope of the present invention.