CN217082544U

CN217082544U - Jet type flat flame combustion device

Info

Publication number: CN217082544U
Application number: CN202121264795.9U
Authority: CN
Inventors: 甄从军; 陆旭
Original assignee: Foshan Enou Combustion Control Technology Co ltd
Current assignee: Foshan Enou Combustion Control Technology Co ltd
Priority date: 2021-06-07
Filing date: 2021-06-07
Publication date: 2022-07-29
Anticipated expiration: 2031-06-07

Abstract

The utility model discloses a jet-flow type flat flame burner, including the flat flame sprayer, the flat flame sprayer includes gas delivery portion and a plurality of nozzle, gas delivery portion is equipped with the gas delivery chamber, the nozzle is equipped with the intercommunication the gas delivery chamber just is the spout of platykurtic, and is a plurality of the nozzle hoop sets up in gas delivery portion, and is a plurality of the spout sets up and is corresponding the outer end of nozzle just arranges along the length direction hoop of its platykurtic. Compared with the prior art, the utility model discloses a jet-flow type flat flame burner, a plurality of nozzles arrange with the hoop mode, make a plurality of spout spun flame hoop that correspond arrange form approximate disc, press close to the plane flame of oven, produce the radiant flame heating effect similar with traditional flat flame burner, because gas in its higher flame speed can the intensive stirring stove in addition promotes the big multiplying power circulation of burner gas, improves furnace temperature homogeneity, improves heat transfer effect.

Description

Jet type flat flame combustion device

Technical Field

The utility model belongs to the technical field of the combustor, concretely relates to jet flow type flat flame burner.

Background

The high-speed burner and the flat flame burner are two special burners with special flame heating performance applied in a heating container (such as a kiln), and have important effects on improving heating efficiency and productivity, saving energy, improving heating quality and reducing emission when being used in specific occasions and working conditions.

Because the high-speed burner is burnt in the combustion chamber, high-temperature flame is ejected from the contraction nozzle of the high-speed burner at high speed under the action of back pressure in the combustion chamber. The high-speed burner has the advantages that 1, because the jet speed of the nozzle is high, a larger negative pressure area is arranged around the nozzle, a large amount of surrounding low-temperature furnace gas can be sucked into the stream, on one hand, the temperature of the high-temperature stream is rapidly reduced to be slightly higher than the furnace temperature, the workpiece is prevented from being burnt, on the other hand, the furnace temperature is homogenized due to the fact that the gas in the furnace is intensively stirred, and the heating quality is improved. 2. The high-speed burner nozzle can produce strong circulation of furnace gas by high-speed and low-temperature flame, and does not cause local overheating risk, so the structure of the furnace is greatly simplified; the number of burners is reduced.

The combustion flame of a flat flame burner is a disc-shaped thin layer flame. The flame sprayed by the flat flame burner is a disc-shaped thin layer which extends to the periphery along the furnace wall (the bottom wall of the heating container), namely, the flat flame with the opening angle of 180 degrees is formed. Air enters the volute in a tangential line to form strong rotating airflow which is sprayed out from the nozzle and mixed with the rotating airflow flowing out from the axial line for combustion, and the airflow obtains larger radial speed by virtue of the centrifugal force of the rotating airflow. After the airflow is sprayed out of the burner, the combustion flame can be diffused along the flared burner expanding opening under the action of centrifugal force to form disc-shaped flame. The flame attaches to the inner wall of the furnace wall to form an even glowing surface, so that the radiation heat transfer effect in the furnace is obviously improved.

The operating performance of flat flame burners is determined primarily by two factors. One is whether the rotating airflow can be unfolded into an ideal circular flat disc, and the other is whether the fuel and the air are effectively mixed in the unfolded circular flat disc to form a concentration distribution which can generate flame with a good shape. The flat flame burner has the advantages that 1, different from the traditional cylindrical direct flame, the flat flame is tightly attached to the furnace wall, the flame area is large, and strong flue gas backflow exists in the center, so that the heating is uniform, and the local overheating can be prevented. 2. Because the flame is tightly attached to the furnace wall, the temperature of the furnace wall is higher than that of the direct flame, and the heating speed of the material is increased by virtue of the high radiation capacity of the furnace wall, which is equivalent to the increase of the heating capacity of the furnace.

The main disadvantage of the flat flame burner is that 1, because the flat flame is the result of the combined action of the rotational flow of the gas and the air and the wall attachment effect of the expanding burner block, only when the intensity of the rotating airflow reaches enough, the ideal flat airflow can be obtained. Therefore, the supply parameters of gas and air have important influence on the formation of flat flame, and even the condition close to direct flame can occur, so that the flame directly impacts the heated material to locally burn. 2. The flat flame characteristic is diffusion combustion. The combustion path is long, the flame speed is low, the driving capability to furnace gas is weak, and the strong circulation capability of high-speed flame and the uniform effect of furnace temperature are not achieved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the problem that current flat flame combustor exists strong circulation ability and the even effect of furnace temperature that do not possess high-speed flame, provide a jet-type flat flame burner who forms the plane flame effect with a plurality of blowout flame hoop arrangements of a plurality of nozzles of ring direction arrangement.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

jet-flow flat flame burner, including flat flame sprayer, flat flame sprayer includes gas conveying portion and a plurality of nozzle, gas conveying portion is equipped with the gas delivery chamber, the nozzle is equipped with the intercommunication the gas delivery chamber just is the spout of platykurtic, and is a plurality of the nozzle hoop sets up in gas conveying portion, and is a plurality of the spout setting is corresponding the outer end of nozzle just follows the length direction hoop of its platykurtic and arranges.

Compared with the prior art, the utility model discloses a jet-flow type flat flame burner, a plurality of nozzles arrange with the hoop mode, make a plurality of spout spun flame hoop that correspond arrange form approximate disc, press close to the plane flame of oven, produce the radiant flame heating effect similar with traditional flat flame burner, because gas in its higher flame speed can the intensive stirring stove in addition promotes the big multiplying power circulation of burner gas, improves furnace temperature homogeneity, improves heat transfer effect.

Further, the nozzle is of an arc-shaped flat structure; by this arrangement, the flame of the nozzle is changed into a flat fan-shaped flame to increase the area of the flame, and a nearly complete disk flame can be obtained.

Furthermore, two sides of the nozzle are of an axis symmetrical structure; through the arrangement, the nozzles can generate flame to form fan-shaped flame which is uniform as a whole.

Furthermore, the outer end of the nozzle is provided with an upper guide part at the upper side of the nozzle and a lower guide part at the lower side of the nozzle, and the distance between the upper guide part and the lower guide part at the central line is gradually narrowed outwards; through the arrangement, the central lines of the nozzles extend outwards and the intervals are gradually narrowed, the flow resistance of central air flow is increased, the central lines are forced to distribute towards the edges at high speed, the flow difference between the central area and the edge area is reduced, and the fan-shaped flame is homogenized.

Furthermore, an avoidance port communicated with the nozzle is formed between two ends of the upper guide part and two ends of the lower guide part; by the arrangement, the transverse jet flow area of the nozzle can be further enlarged, and the flame plane area of the fan-shaped flame is increased.

Alternatively, the spout is a flat structure of rectangular or conical shape.

Further, a plurality of the nozzles are arranged in a rotational symmetry manner; through setting up like this, make the plane flame that forms whole more even, it is effectual to heat.

Furthermore, a plurality of nozzles are arranged at the end part of the gas conveying part along the gas conveying direction, and the included angle between the nozzles and the axis of the gas conveying part in the conveying direction is 45-90 degrees; by such an arrangement, the formed flat flame approaches the object to be heated, and the heating effect is improved.

Further, the nozzles are arranged in four in a rotationally symmetrical manner; by this arrangement, a flat flame can be obtained which is nearly a complete disk flame.

Furthermore, one end of the gas conveying part along the gas conveying direction is provided with a gas pressurizing part, and the inner diameter of the gas pressurizing part is smaller than that of the gas conveying part; through the arrangement, the air flow sprayed out from the nozzle has higher spraying speed, and the generated plane flame is good.

The gas mixer is provided with a gas input port, an air input port and a mixed gas output port connected with the gas conveying cavity; by means of the arrangement, the gas mixer can continuously provide gas-air mixed gas for the flat flame ejector, and continuous generation of flat flames is maintained.

Drawings

FIG. 1 is a schematic view of a jet type flat flame combustion apparatus

FIG. 2 is a structural view of a nozzle opening of an arc-shaped flat structure

FIG. 3 is a front view of a spout having an arcuate flat shape

FIG. 4 is a view showing a structure of a nozzle having a tapered flat structure (dotted line is a contour line of the nozzle and the evasion port)

FIG. 5 is a structural view of a nozzle opening having a rectangular flat structure (dotted line is a contour line of the nozzle opening and the evasion opening)

FIG. 6 is a schematic view of a fan-shaped flat flame generated by an arc-shaped flat nozzle (in the figure, the fan-shaped flat nozzle is a flat flame)

FIG. 7 is a diagram showing the operation of the jet type flat flame combustion apparatus

Detailed Description

The technical scheme of the utility model is described below with the accompanying drawings:

referring to fig. 1 to 7, the utility model discloses a jet-flow type flat flame burner, including flat flame sprayer 1, flat flame sprayer 1 includes gas delivery portion 11 and a plurality of nozzle 12, nozzle 12 is equipped with two at least, perhaps is equipped with three, four or five at least, gas delivery portion 11 is equipped with gas delivery chamber 13, nozzle 12 is equipped with the intercommunication gas delivery chamber 13 just is the spout 121 of platykurtic, and is a plurality of 12 rings of nozzle set up the tip at gas delivery portion 11's tip or output, and is a plurality of spout 121 sets up one to one and corresponds the outer end of nozzle 12 and arranges along its length direction ring of platykurtic.

Compared with the prior art, the utility model discloses a jet-flow type flat flame burner, a plurality of nozzles 12 arrange with the hoop mode, make a plurality of spouts 121 spun flame hoop that correspond arrange form approximate disc, press close to the plane flame of oven, produce the similar radiant flame heating effect with traditional flat flame burner, because gas in its higher flame speed can the intensive mixing stove in addition, promote the big multiplying power circulation of burner gas, improve furnace temperature homogeneity, improve heat transfer effect.

In one embodiment, a plurality of nozzles 12 are circumferentially disposed at the end of the output end of the gas delivery section 11 and each extend outwardly. Alternatively, the plurality of nozzles 12 are annularly disposed at the end of the gas delivery part 11 and do not extend outward, the plurality of nozzles 12 are integrally disposed at the end of the gas delivery part 11, and the plurality of nozzles 121 are annularly disposed at the end of the gas delivery part 11.

Referring to fig. 2 and 5, in one embodiment, a plurality of said nozzles 12 are arranged in rotational symmetry; through setting up like this, make the plane flame that forms whole more even, it is effectual to heat.

Referring to fig. 1 to 3, in an embodiment, the nozzle 121 is an arc-shaped flat structure, and the fan-shaped angle of the flame generated by the arc-shaped nozzle 121 may be set as required, and is preferably between 20 ° and 180 °, such as 30 °, 45 °, 60 °, 90 °, 120 ° or 180 °. The larger the fan-shaped angle of the flame formed by the nozzle holes 121 is, the smaller the number of the nozzles 12 of the flat-flame injector 1 can be set, so that the fan-shaped flames generated by the plurality of nozzle holes 121 are annularly arranged and combined to be a plane flame approximate to a disc; for example, when the fan angle of the flame generated by the nozzle 121 is close to 180 degrees, two nozzles 12 of the flat flame injector 1 may be provided; when the fan angle of the flame generated by the nozzle 121 is close to 120 degrees, three nozzles 12 of the flat flame injector 1 can be arranged; when the fan angle of the flame generated by the nozzle 121 is close to 90 degrees, four nozzles 12 of the flat flame injector 1 may be provided. By doing so, the flame of the nozzle 12 becomes a flat fan flame to increase the area of the flame, and a nearly complete disk flame can be obtained.

Referring to fig. 1 to 3, in a further embodiment, the spout 121 is preferably axially symmetrical on two sides, the outer end of the nozzle 12 is provided with an upper guide portion 122 on the upper side of the spout 121 and a lower guide portion 123 on the lower side of the spout 121, the distance between the central lines of the upper guide portion 122 and the lower guide portion 123 gradually narrows towards the outside, and the arc line of the arc-shaped spout 121 is formed on the outer contour of the upper guide portion 122 and the lower guide portion 123, so that the nozzle 12 is designed into a duckbill shape; through the arrangement, the central line of the nozzle 121 extends outwards and the distance is gradually narrowed, the flow resistance of the central air flow is increased, the high-speed air flow of the central line is forced to be distributed to the edge, the flow difference between the central area and the edge area is reduced, and the fan-shaped flame is homogenized. Ensuring that the flame produced by the nozzle 121 forms an overall uniform fan flame. Further, the distance between the left and right inner side walls of the nozzle 121 gradually increases along the gas outflow direction.

Referring to fig. 2 to 5, in a further embodiment, an escape opening 124 communicating with the nozzle 121 is formed between both ends of the upper guide portion 122 and both ends of the lower guide portion 123; by such an arrangement, the lateral flow area of the nozzle 121 can be further enlarged, and the flame plane area of the fan-shaped flame can be increased.

Referring to fig. 1 to 3, in the present embodiment, the nozzle 12 is an arc-shaped flat structure, four nozzles 12 are arranged in a rotational symmetric manner, the fan-shaped angle of the flame generated by the nozzle 121 is between 70 ° and 85 °, and the furnace gas backflow 15 is generated between the fan-shaped flames generated by adjacent nozzles 121 and on the upper side and the lower side of the fan-shaped flames; through the arrangement, the flat flame can obtain almost complete disc flame, the stirring of furnace gas can be better strengthened, the uniformity of the furnace temperature is improved, and the heat transfer efficiency is improved.

Alternatively, referring to fig. 4, in an embodiment, the nozzle is a flat structure with a conical shape, and the fan angle of the flame generated by the conical nozzle can be set according to requirements, such as 30 °, 45 °, 60 °, 90 °, 120 °, 180 °, and the like. The larger the fan-shaped opening angle of the flame formed by the nozzles is, the smaller the number of the nozzles 12 of the flat flame injector 1 can be set, so that the fan-shaped flames generated by the plurality of nozzles are annularly arranged and combined to form a plane flame similar to a disc; for example, when the fan angle of the flame generated by the nozzle orifice approaches 180 degrees, two nozzles 12 of the flat flame injector 1 may be provided; when the fan angle of the flame generated by the nozzle is close to 120 degrees, three nozzles 12 of the flat flame injector 1 can be arranged; four nozzles 12 of the flat flame ejector 1 may be provided when the fan angle of the nozzle generating the flame approaches 90 degrees. By doing so, the flame of the nozzle 12 becomes a flat fan flame to increase the area of the flame, and a nearly complete disk flame can be obtained. The tapered nozzle means that the nozzle is provided with a taper along the gas outflow direction, and the distance between the left inner side wall and the right inner side wall of the nozzle 121 is gradually increased along the gas outflow direction.

Referring to fig. 4, in the embodiment that the nozzle orifice is a conical flat structure, an upper guide portion 122 is disposed at the upper side of the nozzle orifice at the outer end of the nozzle 12, and a lower guide portion is disposed at the lower side of the nozzle orifice, the distance between the center lines of the upper guide portion 122 and the lower guide portion gradually narrows towards the outside, and an escape opening communicating with the nozzle orifice is formed between two ends of the upper guide portion 122 and two ends of the lower guide portion; through the arrangement, the distance between the central lines of the nozzles is gradually narrowed towards the outside, the flow resistance of central air flow is increased, the central lines of high-speed air flow are forced to be distributed to the edges, the flow difference between the central area and the edge area is reduced, and the fan-shaped flame is homogenized.

Or, referring to fig. 5, in an embodiment, the nozzle is a rectangular flat structure, where the distance between the left and right inner side walls of the nozzle is kept constant along the gas outflow direction, and four, eight, or sixteen nozzles may be uniformly distributed according to requirements, so that the flames generated by the plurality of nozzles are annularly arranged and combined to form a planar flame similar to a disk. Further, the nozzle outer end of rectangle form is located the upside of spout is equipped with the guide part and is located the downside of spout and is equipped with down the guide part, go up the guide part and the interval that lower guide part is located the central line narrows to the outside gradually, form the intercommunication between the both ends of going up the both ends of guide part and the both ends of lower guide part the mouth of dodging of spout.

In other embodiments, the arrangement of the nozzle 121 is not limited to the arc-shaped flat structure, the conical flat structure, or the rectangular flat structure, and may be other structures that generate the fan-shaped flat flame.

Referring to fig. 1, 5 and 6, in one embodiment, a plurality of nozzles 12 are arranged at the end of the gas conveying part 11 along the gas conveying direction, and the included angle between the nozzles 12 and the axis of the conveying direction of the gas conveying part 11 is 45-90 degrees; by such an arrangement, the formed flat flame approaches the object to be heated, and the heating effect is improved.

Referring to fig. 1, in one embodiment, one end of the gas conveying part 11 in the gas conveying direction is provided with a gas pressurizing part 14, and the inner diameter of the gas pressurizing part 14 is smaller than that of the gas conveying part 11; by the arrangement, the airflow sprayed out of the nozzle 12 has higher spraying speed, the speed generated by flame is higher than 100m/s, the stirring of the road gas is strengthened, the exhaust gas is discharged in a large-ratio circulation mode, the uniformity of the furnace temperature is improved, the heat transfer efficiency is improved, and the generated plane flame is good.

When the nozzle 12 is in operation, the flame speed generated by the nozzle 121 is between 70m/s and 200m/s, and a better plane flame can be generated. When the flame speed generated by the nozzle 121 is higher, the stirring capability of furnace gas in the heating furnace can be enhanced, and the temperature uniformity in the furnace is better. On the contrary, when the flame speed generated by the nozzle 121 is lower, the stirring capability of the furnace gas in the heating furnace is weaker, and the temperature uniformity in the furnace is poorer.

Referring to fig. 1, in an embodiment, the gas mixer 2 is connected to the gas conveying part 11, and the gas mixer 2 is provided with a gas input port 21, an air input port 22 and a mixed gas output port 23 connected to the gas conveying cavity 13; by this arrangement, the gas mixer 2 can continuously supply the gas-air mixture gas to the flat flame injector 1, and the continuous generation of the flat flame can be maintained.

Variations and modifications to the above-described embodiments may occur to those skilled in the art, in light of the above teachings and teachings. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should fall within the protection scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims

1. Jet-flow flat flame burner, its characterized in that, including flat flame sprayer, flat flame sprayer includes gas conveying portion and a plurality of nozzle, gas conveying portion is equipped with the gas delivery chamber, the nozzle is equipped with the intercommunication gas delivery chamber just is the spout of platykurtic, and is a plurality of the nozzle hoop sets up in gas conveying portion, and is a plurality of the spout setting is in the correspondence the outer end of nozzle just arranges along its length direction hoop of platykurtic.

2. The jet flat flame combustion device of claim 1, wherein the nozzle orifice is an arc shaped flat structure.

3. The jet flow type flat flame combustion device according to claim 2, wherein the outer end of the nozzle is provided with an upper guide portion on the upper side of the nozzle and a lower guide portion on the lower side of the nozzle, and the distance between the upper guide portion and the lower guide portion on the center line is gradually narrowed toward the outer side.

4. The jet flow type flat flame combustion device according to claim 3, wherein an escape opening communicating with the nozzle is formed between both ends of the upper guide portion and both ends of the lower guide portion.

5. The jet flow type flat flame combustion device according to claim 1, wherein the nozzle is a flat structure with a rectangular or conical shape.

6. The jet flat flame combustion device of any of claims 1 to 5, wherein the plurality of nozzles are arranged in a rotational symmetry.

7. The jet flat flame combustion device according to any of claims 1 to 5, wherein a plurality of the nozzles are arranged at the end of the gas delivery portion in the gas delivery direction, and the angle between the nozzles and the axis of the gas delivery portion in the delivery direction is between 45 and 90 degrees.

8. The jet flat flame combustion device according to any of claims 1 to 5, wherein four nozzles are arranged in a rotationally symmetrical manner.

9. The jet flow type flat flame combustion device according to any one of claims 1 to 5, wherein a gas pressurizing portion having an inner diameter smaller than that of the gas conveying portion is provided at one end of the gas conveying portion in the gas conveying direction.

10. The jet flat flame combustion device according to any of claims 1 to 5, further comprising a gas mixer connected to the gas delivery portion, the gas mixer being provided with a gas input port, an air input port and a mixed gas output port connected to the gas delivery chamber.