CN218583154U - Gas channel of rotary kiln burner nozzle and burner nozzle - Google Patents

Abstract

The utility model provides a gas passageway and combustor nozzle of rotary kiln combustor nozzle. The gas channel of the rotary kiln burner nozzle comprises a gas inner pipe and a gas outer pipe which are concentrically arranged, wherein the gas outer pipe is arranged outside the gas inner pipe; a first gas channel is formed between the outer wall of the gas inner pipe and the inner wall of the gas outer pipe; the outer wall of the gas inner pipe or the inner wall of the gas outer pipe is provided with a plurality of helical blades along the circumference; the helical blades divide the first fuel gas channel into a plurality of helical rotational flow fuel gas channels. The angle of the helical blade is between 15 and 25 degrees. The rotating direction of the spiral blade is the same as the rotating direction of the rotary kiln. A burner nozzle comprising the first gas passage with the helical blades. The utility model discloses the gas has certain rotational speed can more even diffusion after flowing from whirl gas passageway, is favorable to the follow-up ignition.

Description

Gas channel of rotary kiln burner nozzle and burner nozzle

Technical Field

The utility model belongs to rotary kiln combustor field, concretely relates to gas channel and combustor nozzle of rotary kiln combustor nozzle.

Background

In the existing rotary kiln combustor, no matter a pure coal powder combustor, a gas combustor and a combustor for mixing coal powder and gas, spiral flow guide structures are never arranged in a coal powder channel and a gas channel. After the pulverized coal and the fuel gas are blown out, the blown pulverized coal and the blown fuel gas are diffused only by the compressed air in the rotational flow air duct and the like, so that the pulverized coal and the fuel gas are convenient to burn. And pulverized coal and gas combustion all need the oil spout passageway through the nozzle from inside ignition. For a pure gas burner, the gas can be ignited by an electric igniter, and a special oil gun is not required to be arranged.

SUMMERY OF THE UTILITY MODEL

The utility model provides a gas passageway and combustor nozzle of rotary kiln combustor nozzle.

The purpose of the utility model is realized with the following mode: the gas channel of the rotary kiln burner nozzle comprises a gas inner pipe and a gas outer pipe which are concentrically arranged, and the gas outer pipe is arranged outside the gas inner pipe; a first gas channel is formed between the outer wall of the gas inner pipe and the inner wall of the gas outer pipe; a plurality of helical blades are arranged on the outer wall of the gas inner pipe or the inner wall of the gas outer pipe along the circumference; the helical blades divide the first fuel gas channel into a plurality of helical swirl fuel gas channels.

The angle of the helical blade is between 15 and 25 degrees.

Six helical blades are uniformly distributed in the first gas channel along the circumference.

The rotating direction of the spiral blade is the same as the rotating direction of the rotary kiln.

A burner nozzle comprising the first gas passage with the helical blades.

An outer shaft is concentrically arranged outside the gas outer pipe, and a second gas channel is formed between the inner wall of the outer shaft and the outer wall of the gas outer pipe; the helical blades are also arranged in the second gas channel along the circumference, and the second gas channel is also divided into a plurality of helical rotational flow gas channels; and the rotational flow direction of the first fuel gas channel and the second fuel gas channel is the same as the rotation direction of the rotary kiln.

The nozzle comprises a central shaft, an ignition channel is arranged in the central shaft, and an electric ignition mechanism is arranged in the ignition channel; and no coal dust channel is arranged in the nozzle.

The utility model has the advantages that: set up helical blade and divide into a plurality of spiral heliciform whirl gas passageways with first gas passageway, the gas has certain rotational speed can more even diffusion after flowing from whirl gas passageway, is favorable to follow-up ignition.

Drawings

Fig. 1 is an overall schematic view of a combustor.

Fig. 2 is a perspective view of the nozzle.

FIG. 3 is a cross-sectional view of the nozzle portion.

Fig. 4 is a central axis perspective view.

Fig. 5 is a perspective view of the cyclone.

Fig. 6 is a perspective view of the gas inner tube.

Fig. 7 is a perspective view of the gas outer tube.

FIG. 8 is a schematic view of the nozzle concealing outer tube.

Fig. 9 is an enlarged perspective view of the burner tail.

Wherein 2 is a nozzle, 20 is a central shaft, 21 is a swirler, 22 is a gas inner pipe, 23 is a gas outer pipe, 24 is an outer shaft, and 25 is an outer pipe; 200 is a conical outer surface, 201 is a helical protrusion, 210 is a helical groove, 220 is a helical blade; 240 is an outer shaft tuyere, 241 is an air outlet groove, 30 is an ignition channel, 31 is an inner swirl air passage, 32 is an outer swirl air passage, 33 is a first gas passage, 34 is a second gas passage, 35 is an axial flow air passage, 4 is a rear pipe, 40 is a central pipe, 41 is a first air pipe, 42 is a second air pipe, 43 is an inner gas pipe, 44 is an outer gas pipe, and 45 is a third air pipe; 46 is a first gas feed conduit, 47 is a second gas feed conduit, 48 is a third gas feed conduit, 49 is a first gas inlet, and 50 is a second gas inlet.

Detailed Description

While the invention has been described in connection with certain specific embodiments and embodiments, it is to be understood that the same is by way of illustration and description only and is not to be taken by way of limitation, the scope of the invention should be limited only by the terms of the appended claims and the various changes and modifications that can be made by one skilled in the art based upon the teachings herein. In the present invention, unless otherwise specifically defined and limited, the technical terms used in the present application should be the meanings commonly understood by those skilled in the art to which the present invention belongs. The terms "connected", "fixed", "arranged" and the like are to be understood in a broad sense, and may be fixedly connected, detachably connected or integrated; can be directly connected or indirectly connected through an intermediate medium; either mechanically or electrically. Unless explicitly defined otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

Unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features, or indirectly contacting the first and second features through intervening media. Furthermore, a first feature may be "on" or "over" or "above" a second feature, and the like, may be directly on or obliquely above the second feature, or may simply mean that the first feature is at a higher level than the second feature. A first feature "under" or "beneath" a second feature may be directly under or obliquely under the first feature or may simply mean that the first feature is at a lesser level than the second feature. Relational terms such as first, 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. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.

As shown in fig. 1 to 9, the gas channel of the burner nozzle of the rotary kiln comprises a gas inner tube 22 and a gas outer tube 23 which are concentrically arranged, and the gas outer tube 23 is arranged outside the gas inner tube 22; a first fuel gas channel 33 is formed between the outer wall of the fuel gas inner pipe 22 and the inner wall of the fuel gas outer pipe 23; a plurality of helical blades 220 are arranged on the outer wall of the gas inner pipe 22 or the inner wall of the gas outer pipe 23 along the circumference; the helical blades 220 divide the first gas passage 33 into a plurality of helical swirl gas passages. In the existing rotary kiln combustor, no matter a pure coal powder combustor, a gas combustor and a combustor for mixing coal powder and gas, helical blades and rotational flow structures are never arranged in a coal powder channel and a gas channel. The compressed air in the cyclone air duct and the like is only used for diffusing the coal dust and the fuel gas. The utility model discloses in utilize helical blade 220 will first gas passageway 33 falls into a plurality of spiral shape whirl gas passageways, the gas has certain rotational speed can more even diffusion after flowing from whirl gas passageway, is favorable to the follow-up ignition.

Further, the spiral angle of the spiral blade 220 is between 15 and 25 degrees. Preferably 20 degrees. Six helical blades 220 are circumferentially and evenly distributed in the first gas passage 33. The rotation direction of the spiral blade 220 is the same as the rotation direction of the rotary kiln.

The burner nozzle adopting the gas channel of the rotary kiln burner nozzle comprises the first gas channel 33 with the spiral blade 220.

In addition, an outer shaft 24 is concentrically arranged outside the gas outer pipe 23, and a second gas channel 34 is formed between the inner wall of the outer shaft 24 and the outer wall of the gas outer pipe 23; the helical blades 220 are also arranged in the second gas channel 34 along the circumference, so that the second gas channel 34 is also divided into a plurality of helical swirl gas channels; the swirling directions of the first gas channel 33 and the second gas channel 34 are the same as the rotation direction of the rotary kiln. Of course, the helical blade 220 may not be disposed in the second gas passage 34, but the conventional structure may be maintained.

Further, the nozzle 2 comprises a central shaft 20, an ignition channel 30 is arranged in the central shaft 20, an electric ignition mechanism is arranged in the ignition channel 30, and the specific structure of the electric ignition mechanism is not shown in the drawing; and a pulverized coal channel is not arranged in the nozzle 2. The pulverized coal in the pulverized coal channel is difficult to ignite, and a high-pressure oil gun is required to be arranged in an ignition channel of a common burner with the pulverized coal channel. For a pure fuel gas channel without pulverized coal, fuel gas is easy to burn, so an electric ignition mechanism can be adopted for ignition. The rear end of the electric ignition mechanism is connected with a controller, and ignition is controlled through the controller. Electric ignition mechanisms are prior art and available from procurement. And will not be described in detail. The combustor nozzle of the electric ignition mechanism is adopted, the gas channel is more suitable for being provided with the helical blade 220, so that the gas coming out from the gas channel can be diffused by itself to accelerate combustion.

As shown in fig. 1 to 9, the nozzle 2 of the six-channel gas burner is provided with a central shaft 20, a swirler 21, a gas inner pipe 22, a gas outer pipe 23, an outer shaft 24 and an outer pipe 25 concentrically from inside to outside; an ignition channel 30 is arranged in the central shaft 20, an inner swirling air channel 31 is arranged in front of the central shaft 20 and the swirler 21, an outer swirling air channel 32 is arranged between the swirler 21 and the gas inner pipe 22, a first gas channel 33 is arranged between the gas inner pipe 22 and the gas outer pipe 23, and a second gas channel 34 is arranged between the gas outer pipe 23 and the outer shaft 24; between the outer shaft 24 and the outer tube 25 is an axial air duct 35.

Wherein, a plurality of helical blades 220 are arranged on any one or both of the first gas channel 33 and the second gas channel 34 along the circumference to form a rotational flow gas channel; the rotational directions of the rotational flow gas channel, the inner rotational flow air channel and the outer rotational flow air channel are the same. The rotation direction of the rotary kiln is kept consistent, so that the uniform mixing of the fuel gas and the materials is ensured. The angle of the helical blades 220 and other technical features are described in detail above in the gas passage of the rotary kiln burner nozzle and will not be repeated.

In a specific embodiment, the first gas channel 33 is a channel for passing converter gas; the second gas passage 34 is a passage through which coke oven gas is passed; a plurality of helical blades 220 are arranged on the outer wall of the gas inner pipe 22 or the inner wall of the gas outer pipe 23 along the circumference; the helical blades 220 divide the first gas passage 33 into a plurality of helical swirl gas passages. The helical blade 220 is not provided in the second gas passage 34. The second gas passage 34 is provided with a support plate therein for supporting without swirling effect. Since the coke oven gas is more easily burned than the converter gas and the second gas passage 34 is wider, the helical blade 220 may not be provided and the materials can be easily burned after being mixed. The angle of the helical blade 220 is between 15 and 25 degrees. An oil gun and an electric ignition mechanism are not arranged in the ignition channel 30. Of course, the oil gun ignition mechanism can also achieve the ignition effect.

In addition, the front end of the central shaft 20 is provided with a conical outer surface 200, and the diameter of one side of the conical outer surface 200 close to the front end face of the central shaft 20 is the largest; a plurality of spiral protrusions 201 are circumferentially arranged on the cylindrical surface of the front end of the central shaft 20 close to the conical outer surface 200; the inner surface of the swirler 21 is in a cylindrical hole shape, and the inner surface of the swirler 21 is matched with the outer surface of the central shaft 20 provided with the spiral protrusion 201 and the conical outer surface 200 to form the inner swirling air duct. The compressed air forms swirling wind through the passages between the spiral protrusions 201 and then is ejected from the gaps between the tapered outer surface 200 and the inner surface of the swirler 21. By adjusting the central shaft 20 or the swirler 21 back and forth, the gap between the tapered outer surface 200 and the inner surface of the swirler 21 is changed, thereby adjusting the air volume and the air speed. The angle of the helical protrusion 201 is between 35 and 45 degrees.

A plurality of spiral grooves 210 are arranged on the outer surface of the swirler 21 along the circumference; the inner surface of the gas inner pipe 22 and the outer surface of the swirler 21 provided with the spiral groove 210 form the outer swirl air duct 32; the cross-sectional area of the spiral groove 210 is gradually reduced as the spiral groove 210 extends toward the nozzle 2. The relative positions of the swirler 21 and the gas inner pipe 22 are adjusted back and forth, so that the wind speed and the flow rate of the outlet of the outer swirling air channel 32 can be adjusted. In addition, the front end of the outer shaft 24 is an outer shaft tuyere 240 with a conical outer surface, the front end of the outer shaft tuyere 240 has a large diameter and the rear end has a small diameter, an air outlet groove 241 is formed in the outer shaft tuyere 240 along the circumference, the air outlet groove 241 is a part of a cylindrical hole, and the axis of the air outlet groove 241 is parallel to the axis of the outer shaft 24; the inner surface of the outer tube 25 is cylindrical hole shape, and forms an axial flow air duct 35 by matching with the outer surface of the outer shaft 24. Moving either the outer shaft 24 or the outer tube 25 forward or backward can change the flow rate and volume of the axial flow duct 35. The structure of the outer shaft 24 belongs to the prior art, and the axial flow air channel structure of the burner nozzle of the patent CN209726202U and the burner nozzle are described in detail. And will not be described in detail.

As shown in fig. 1-9, a six-channel kiln tail burner includes the nozzle 2 described above and the rear duct 4 connected to the nozzle 2. The rear duct 4 includes, from inside to outside, a center duct 40, a first air duct 41, a second air duct 42, an inner air duct 43, an outer gas duct 44, and a third air duct 45. The nozzle 2 is concentrically provided with a central shaft 20, a swirler 21, a gas inner pipe 22, a gas outer pipe 23, an outer shaft 24 and an outer pipe 25 from inside to outside in sequence; an ignition channel 30 is arranged in the central shaft 20, an inner swirling air channel 31 is arranged in front of the central shaft 20 and the swirler 21, an outer swirling air channel 32 is arranged between the swirler 21 and the gas inner pipe 22, a first gas channel 33 is arranged between the gas inner pipe 22 and the gas outer pipe 23, and a second gas channel 34 is arranged between the gas outer pipe 23 and the outer shaft 24; between the outer shaft 24 and the outer tube 25 is an axial air duct 35. The central shaft 20 of the nozzle 2 is connected with the central pipeline 40; the cyclone 21 is connected to the first air duct 41; the gas inner pipe 22 is connected with the second air pipeline 42; the outer gas pipe 23 is connected with the inner gas pipeline 43; the outer shaft 24 is connected to the outer gas duct 44, and the outer tube 25 is connected to the third air duct 45.

The rear pipeline 4 further comprises a main air supply pipeline communicated with a compressed air source, and a first air supply pipeline 46, a second air supply pipeline 47 and a third air supply pipeline 48 which are respectively communicated with the first air pipeline 41, the second air pipeline 42 and the third air pipeline 45 are arranged on the main air supply pipeline; a first gas inlet 49 is arranged on the inner gas pipeline 43, and a second gas inlet 50 is arranged on the outer gas pipeline 44. Wherein, the first air supply pipeline 46, the second air supply pipeline 47 and the third air supply pipeline 48 are respectively provided with a valve or a flowmeter to control the flow rate of the entering compressed air.

The rear end of any one of the third air pipeline 45 and the outer gas pipeline 44 is provided with an expansion joint; the rear ends of the first air passage 41 and the second air passage 42 are respectively provided with a telescopic joint. The telescopic joint can be pulled to adjust the corresponding pipeline back and forth, so that the wind direction and the wind speed of the nozzle can be adjusted. The remaining structure of the nozzle 2 may be that described above and will not be described in detail.

In specific implementation, compressed air is respectively fed into the first air feeding pipeline 46, the second air feeding pipeline 47 and the third air feeding pipeline 48; coal gas is introduced into the first coal gas inlet 49 and the second coal gas inlet 50. The controller controls the electric ignition mechanism to ignite, so that the burner burns.

It should be noted that terms such as "central," "lateral," "longitudinal," "length," "width," "thickness," "height," "front," "rear," "left," "right," "up," "down," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," "clockwise," "counterclockwise," and the like used in the description are used in an orientation or positional relationship indicated based on the orientation or positional relationship shown in the drawings, and are used for convenience of description only and for simplicity of description, and 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. Therefore, should not be construed as limiting the scope of the invention.

The foregoing is only a preferred embodiment of the present invention, rather than all embodiments, and the scope of the present invention is not limited thereto. The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features. When the technical solutions are contradictory or cannot be combined, the combination of the technical solutions should be considered to be absent, and is not within the protection scope of the present invention. It should be noted that those skilled in the art and any person skilled in the art can equally replace or change the technical solution of the present invention and the inventive concept thereof, and make several changes and improvements without departing from the spirit of the present invention and the present invention, which should be considered as the protection scope of the present invention.

Claims (7)

1. The gas channel of the rotary kiln burner nozzle comprises a gas inner pipe and a gas outer pipe which are concentrically arranged, wherein the gas outer pipe is arranged outside the gas inner pipe; a first gas channel is formed between the outer wall of the gas inner pipe and the inner wall of the gas outer pipe; the method is characterized in that: a plurality of helical blades are arranged on the outer wall of the gas inner pipe or the inner wall of the gas outer pipe along the circumference; the helical blades divide the first fuel gas channel into a plurality of helical swirl fuel gas channels.

2. The gas channel of the burner nozzle of the rotary kiln as set forth in claim 1, wherein: the angle of the helical blade is between 15 and 25 degrees.

3. The gas channel of the burner nozzle of the rotary kiln according to claim 1, wherein: six helical blades are uniformly distributed in the first gas channel along the circumference.

4. The gas channel of the burner nozzle of the rotary kiln as set forth in claim 1, wherein: the rotating direction of the spiral blade is the same as the rotating direction of the rotary kiln.

5. Burner nozzle for gas channel of burner nozzle of rotary kiln according to any of claims 1 to 4, characterized in that: comprising said first gas channel with said helical blade.

6. The burner nozzle of claim 5, wherein: an outer shaft is concentrically arranged outside the gas outer pipe, and a second gas channel is formed between the inner wall of the outer shaft and the outer wall of the gas outer pipe; the helical blades are also arranged in the second gas channel along the circumference, and the second gas channel is also divided into a plurality of helical rotational flow gas channels; and the rotational flow direction of the first fuel gas channel and the second fuel gas channel is the same as the rotation direction of the rotary kiln.

7. The combustor nozzle as in claim 5, wherein: the nozzle comprises a central shaft, an ignition channel is arranged in the central shaft, and an electric ignition mechanism is arranged in the ignition channel; and a pulverized coal channel is not arranged in the nozzle.

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