CN217503673U - Seven-channel combustor nozzle and combustor - Google Patents

Abstract

The seven-channel burner nozzle comprises a central shaft, a swirler, a pulverized coal pipe, an inner shaft pipe, a gas inner pipe, a gas outer pipe, an outer shaft pipe and an outer air pipe which are sequentially arranged from inside to outside; the ignition device comprises a central shaft, a cyclone, an inner shaft tube, a fuel gas inner tube, a fuel gas outer tube, an ignition channel, an inner cyclone air channel, an outer cyclone air channel, a coal powder channel, an inner axial flow air channel and a first fuel gas channel, wherein the ignition channel is arranged in the central shaft, the inner cyclone air channel is arranged between the central shaft and the cyclone, the outer cyclone air channel is arranged between the cyclone and the coal powder tube, the inner axial flow air channel is arranged between the coal powder tube and the inner shaft tube, the inner axial flow air channel is arranged between the inner shaft tube and the fuel gas inner tube, and the first fuel gas channel is arranged between the fuel gas inner tube and the fuel gas outer tube. Compared with the prior art, the utility model discloses a nozzle the buggy passageway sets up the interior axial flow wind channel that is used for gathering together specially outward, cooperates outermost outer axial flow wind channel, can play the better effect of gathering together flame. The seven-channel combustor can simultaneously adopt pulverized coal and gas as fuels, conveniently adjusts the size and the direction of air, and realizes flame adjustment.

Description

Seven-channel burner nozzle and burner

Technical Field

The utility model belongs to rotary kiln combustor field, concretely relates to seven passageway combustor nozzles and combustor.

Background

The rotary kiln combustor comprises various pure coal powder combustors, gas combustors and a mixed combustor for mixing coal powder and gas. The hybrid burner is a burner commonly used in a conventional cement kiln or the like, and uses pulverized coal as a fuel, and can also reuse gas generated in industry, such as coke oven gas, blast furnace gas, converter gas, or the like. The number of the specific gas passages and the width of each gas passage are determined according to various kinds of gas actually generated in each plant, and are different from each other. In the existing burner, an outer axial flow air channel is generally arranged at the outermost layer of the burner to gather flame. However, in some combustors used in factories, the number of gas channels is large, or the number of layers of gas channels is large, the distance between the pulverized coal channel and the outer axial flow air channel is too large, the gathering effect of the outer axial flow air on flame cannot meet the requirement, and the overall effect of the combustor is not good.

Disclosure of Invention

The utility model provides a seven passageway combustor nozzles and combustor.

The purpose of the utility model is realized with the following mode:

the seven-channel burner nozzle comprises a central shaft, a swirler, a pulverized coal pipe, an inner shaft pipe, a gas inner pipe, a gas outer pipe, an outer shaft pipe and an outer air pipe which are sequentially arranged from inside to outside; the ignition device comprises a central shaft, a cyclone, a coal powder pipe, an inner shaft pipe, a gas inner pipe, a gas outer pipe, a second gas channel, an ignition channel, an inner cyclone air channel, an outer cyclone air channel, an inner axial flow air channel, a first gas channel, a second gas channel and an outer axial flow air channel, wherein the ignition channel is arranged in the central shaft, the inner cyclone air channel is arranged between the central shaft and the cyclone, the outer cyclone air channel is arranged between the cyclone and the coal powder pipe, the coal powder channel is arranged between the coal powder pipe and the inner shaft pipe, the inner axial flow air channel is arranged between the inner shaft pipe and the gas inner pipe, the first gas channel is arranged between the gas inner pipe and the gas outer pipe, the second gas channel is arranged between the gas outer pipe and the outer axial flow air channel, and the outer axial flow air channel is arranged between the outer shaft and the outer pipe.

Inner shaft air outlet grooves are uniformly distributed at the front end of the outer circumferential surface of the inner shaft tube, and the flow direction of the inner shaft air outlet grooves is parallel to the axial direction of the inner shaft tube; the inner surface of the gas inner pipe is in a cylindrical hole shape; the front end of the outer shaft tube is an outer shaft wind head with a conical outer surface, the front end of the outer shaft wind head is large in diameter, the rear end of the outer shaft wind head is small in diameter, an outer shaft wind outlet groove is formed in the outer shaft wind head along the circumference and is a part of a cylindrical hole, and the axis of the outer shaft wind outlet groove is parallel to the axis of the outer shaft tube; the inner surface of the outer air duct is cylindrical and is matched with the outer surface of the outer shaft tube to form an outer axial flow air duct.

Comprises the nozzle and a rear pipeline connected with the nozzle; the rear pipeline comprises a central pipeline, a first air pipeline, a second air pipeline, a pulverized coal pipeline, a third air pipeline, an inner gas pipeline, an outer gas pipeline and a fourth air pipeline from inside to outside; the central shaft of the nozzle is connected with the central pipeline; the swirler is connected with the first air pipeline; the pulverized coal pipe is connected with the second air pipeline; the inner shaft pipe is connected with the pulverized coal pipeline, the gas inner pipe is connected with the third air pipeline, the gas outer pipe is connected with the inner gas pipeline, the outer shaft pipe is connected with the outer gas pipeline, and the outer air pipe is connected with the fourth air pipeline.

The rear pipeline also comprises a main air supply pipeline communicated with compressed air, and the main air supply pipeline is provided with a first air supply pipeline, a second air supply pipeline, a third air supply pipeline and a fourth air supply pipeline which are respectively connected with the first air pipeline, the second air pipeline, the third air pipeline and the fourth air pipeline through valves; the rear ends of the inner gas pipeline and the outer gas pipeline are respectively communicated with a first gas inlet and a second gas inlet; a pulverized coal inlet is arranged at the rear end of the pulverized coal pipeline, and telescopic joints driven to stretch by a driving mechanism are respectively arranged between the rear end of the first air pipeline and the central pipeline, between the rear end of the second air pipeline and the first air pipeline, and between the fourth air pipeline and the outer gas pipeline; at least one telescopic joint is arranged on the main air supply pipeline.

Compared with the prior art, the utility model discloses a nozzle the buggy passageway sets up the interior axial flow wind channel that is used for gathering together specially outward, cooperates outermost outer axial flow wind channel, can play the better effect of gathering together flame. The seven-channel combustor can simultaneously adopt pulverized coal and fuel gas as fuels, and conveniently adjusts the size and the direction of air to realize flame adjustment.

Drawings

Fig. 1 is an overall view of a combustor.

Fig. 2 is an overall view of the nozzle.

Fig. 3 is a cross-sectional view of the nozzle.

Fig. 4 is a schematic view of the central axis.

FIG. 5 is a schematic view of a cyclone.

Fig. 6 is an illustration of the inner shaft tube.

Fig. 7 is a schematic view of an outer shaft tuyere.

Figure 8 is a schematic rear duct tail.

Wherein, 2 is a nozzle, 20 is a central shaft, 21 is a swirler, 22 is a pulverized coal pipe, 23 is an inner shaft pipe, 24 is a gas inner pipe, 25 is a gas outer pipe, 26 is an outer shaft pipe, and 27 is an outer air pipe; 200 is a conical outer surface, 201 is a helical protrusion, 210 is a helical groove, 240 is a helical blade; 230 is an inner shaft air outlet groove, 260 is an outer shaft air head, 261 is an outer shaft air outlet groove, 30 is an ignition channel, 31 is an inner rotational flow air channel, 32 is an outer rotational flow air channel, 33 is a pulverized coal channel, 34 is an inner axial flow air channel, 35 is a first fuel gas channel, 36 is a second fuel gas channel, 37 is an outer axial flow air channel, 4 is a rear pipeline, 40 is a central pipeline, 41 is a first air pipeline, 42 is a second air pipeline, 43 is a pulverized coal pipeline, 44 is a third air pipeline, 45 is an inner fuel gas pipeline, 46 is an outer fuel gas pipeline, and 47 is a fourth air pipeline; 48 is the main feed gas conduit, 49 is the first fuel gas inlet, 50 is the second fuel gas inlet, 51 is the pulverized coal inlet, 52 is the expansion joint.

Detailed Description

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 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. Terms used in the description such as "center", "transverse", "longitudinal", "length", "width", "thickness", "height", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description of the present invention and for simplification of the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation.

The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. As shown in fig. 1 to 8, a burner nozzle of a kiln head comprises a pulverized coal channel 33 and at least one gas channel concentrically arranged from inside to outside, wherein an external axial flow air duct 37 is arranged outside the gas channel at the outermost layer: the method is characterized in that: an inner axial flow air duct 34 is arranged between the coal powder channel 33 and a fuel gas channel close to the coal powder channel 33. The pulverized coal passage 33 is used for introducing pulverized coal; the gas channel is used for coke oven gas, converter gas, blast furnace gas and the like on the same day. Axial flow wind, namely direct blowing wind, is communicated in the outer axial flow wind channel, and the function of gathering flame can be achieved. For the nozzle 2 of the mixing burner with a wider gas channel, the distance effect of the outer axial flow wind to the pulverized coal is not good. The utility model discloses buggy passageway 33 sets up the interior axial flow wind channel 34 that is used for gathering together specially outward, cooperates outmost outer axial flow wind channel 37, can play the better effect of gathering together flame. And the air channel is added between the coal powder channel 33 and the fuel gas channel, so that more oxygen can be brought, and the combustion is more sufficient.

The inner axial flow air duct 34 is a passage between the inner shaft tube 23 and the gas inner tube 24 which are concentrically arranged; the gas inner pipe 24 is arranged outside the inner shaft pipe 23; inner shaft air outlet grooves 230 are uniformly distributed at the front end of the inner shaft tube 23 along the outer circumferential surface; the flow direction of the inner shaft air outlet slot 230 is parallel to the axial direction of the inner shaft tube 23; the inner surface of the gas inner pipe 24 is cylindrical hole shape. The flow direction of the outer shaft air-out groove 261 here means a direction in which the wind passes through the outer shaft air-out groove 261. Generally in the direction of the centerline or axis of the outer shaft air outlet channel 261. The flow direction of the outer shaft air outlet groove 261 is parallel to the axial direction of the inner shaft tube 23, so that the air of the outer shaft air duct 37 is blown out along the axial direction, and the effect of folding flame is achieved.

The inner axial air outlet groove 230 is a semi-cylindrical hole. Here, the cross section of the semi-cylindrical hole is not strictly semicircular, and an angle greater than or less than 180 degrees is possible.

The outer axial flow air duct 37 is a channel between the outer shaft tube 26 and the outer air tube 27 which are concentrically arranged; the front end of the outer shaft tube 26 is an outer shaft tuyere 260 with a conical outer surface, the front end of the outer shaft tuyere 260 has a large diameter and a small diameter at the rear end, an outer shaft air outlet groove 261 is formed in the outer shaft tuyere 260 along the circumference, the outer shaft air outlet groove 261 is a part of a cylindrical hole, and the axis of the outer shaft air outlet groove 261 is parallel to the axis of the outer shaft tube 26; the inner surface of the outer air duct 27 is cylindrical and is matched with the outer surface of the outer shaft tube 26 to form an outer axial air duct 37.

At least one of the gas passages is provided with a plurality of helical blades 240 along the circumference to form a rotational flow gas passage.

The seven-channel nozzle 2 shown in fig. 1 to 8, wherein the nozzle 2 comprises a central shaft 20, a swirler 21, a pulverized coal pipe 22, an inner shaft pipe 23, a gas inner pipe 24, a gas outer pipe 25, an outer shaft pipe 26 and an outer air pipe 27 which are arranged in sequence from inside to outside; an ignition channel 30 is arranged inside the central shaft 20, an inner swirling air duct 31 is arranged between the central shaft 20 and the swirler 21, an outer swirling air duct 32 is arranged between the swirler 21 and the pulverized coal pipe 22, a pulverized coal channel 33 is arranged between the pulverized coal pipe 22 and the inner shaft pipe 23, an inner axial air duct 34 is arranged between the inner shaft pipe 23 and the gas inner pipe 24, a first gas channel 35 is arranged between the gas inner pipe 24 and the gas outer pipe 25, a second gas channel 36 is arranged between the gas outer pipe 25 and the outer shaft pipe 26, and an outer axial air duct 37 is arranged between the outer shaft pipe 26 and the outer air pipe 27. Typically, the ignition channel 30 is not counted in the air duct of the burner. The utility model discloses an include in seven passageway combustor nozzles 2 outer whirl wind channel 32, interior whirl wind channel 31, buggy passageway 33, first gas passageway 35, second gas passageway 36, outer axial flow wind channel 37. An ignition device is arranged in the ignition channel 30. The ignition device can be an oil gun or an electric ignition mechanism. According to the actual situation.

Inner shaft air outlet grooves 230 are uniformly distributed at the front end of the outer circumferential surface of the inner shaft tube 23; outer axle pipe 26 front end is outer axle wind head 260 that the surface is conical, sets up outer axle air-out groove 261 along the circumference on outer axle wind head 260, outer axle air-out groove 261 is a part of cylindrical hole. These have already been described above.

A plurality of helical blades 240 are arranged on any one or both of the first fuel gas channel 35 and the second fuel gas channel 36 along the circumference to form a rotational flow fuel gas channel; the swirling gas passage, the inner swirling air duct 31 and the outer swirling air duct 32 have the same swirling direction. In the specific embodiment, coke oven gas is used as the fuel gas in the first fuel gas passage 35, and blast furnace gas is used as the fuel gas in the second fuel gas passage 36. The helical blades 240 are arranged in the first gas channel 35, and can play a role of divergence. 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 31; a plurality of spiral grooves 210 are arranged on the outer surface of the swirler 21 along the circumference; the inner side surface of the pulverized coal pipe 22 and the outer surface of the cyclone 21 provided with the spiral groove 210 form the outer cyclone 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 structures of the inner cyclone air duct 31 and the outer cyclone air duct 32 are prior art and will not be described in detail.

A seven-channel combustor comprising the nozzle 2 and an aft duct 4 connected to the nozzle 2; the rear pipeline 4 comprises a central pipeline 40, a first air pipeline 41, a second air pipeline 42, a pulverized coal pipeline 43, a third air pipeline 44, an inner air pipeline 45, an outer gas pipeline 46 and a fourth air pipeline 47 from inside to outside; 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 pulverized coal pipe 22 is connected with the second air pipe 42; the inner shaft tube 23 is connected to the pulverized coal pipeline 43, the gas inner tube 24 is connected to the third air pipeline 44, the gas outer tube 25 is connected to the inner gas pipeline 45, the outer shaft tube 26 is connected to the outer gas pipeline 46, and the outer air tube 27 is connected to the fourth air pipeline 47.

The rear pipeline 4 further comprises a main air supply pipeline 48 communicated with compressed air, and the main air supply pipeline 48 is provided with a first air supply pipeline, a second air supply pipeline, a third air supply pipeline and a fourth air supply pipeline which are respectively connected with the first air pipeline 41, the second air pipeline 42, the third air pipeline 44 and the fourth air pipeline 47 through valves; the rear ends of the inner gas pipeline 45 and the outer gas pipeline 46 are respectively communicated with a first gas inlet 49 and a second gas inlet 50; a pulverized coal inlet 51 is arranged at the rear end of the pulverized coal pipeline 43, and expansion joints 52 which are driven by a driving mechanism to expand and contract are respectively arranged between the rear end of the first air pipeline 41 and the central pipeline 40, between the rear end of the second air pipeline 42 and the first air pipeline 41, and between the fourth air pipeline 47 and the outer gas pipeline 46; at least one telescopic joint 52 is arranged on the main air supply pipeline 48. The driving mechanism for driving the telescopic joint 52 to extend and retract can be a lifter, which is already known and will not be described in detail. The telescopic joint 52 is arranged on the main air supply pipeline 48, so that the position of the main air supply pipeline 48 can be changed in a self-adaptive manner.

In the specific implementation: compressed air is respectively fed into the first air feeding pipeline, the second air feeding pipeline, the third air feeding pipeline and the third air feeding channel; gas is introduced into the first gas inlet 49 and the second gas inlet 50, and coal powder is introduced into the coal powder inlet 51. The controller controls the electric ignition mechanism to ignite or the oil gun to ignite, so that the combustor burns. The lifting structure drives the telescopic joint 52 to stretch, and the corresponding pipeline can be pulled forwards and backwards, so that the wind direction and the rotating speed of the air sprayed by the nozzle 2 can be adjusted, and the size and the shape of flame can be adjusted.

The features of the above-described embodiments may be arbitrarily combined, and the combination of the features should be considered as being within the scope of the present description, unless there is any contradiction between the combinations. Without departing from the overall concept of the present invention, the technical solution of the present invention and equivalent replacements or changes, and a plurality of changes and improvements made, should also be regarded as the protection scope of the present invention.

Claims (4)

1. Seven passageway combustor nozzles, its characterized in that: the nozzle comprises a central shaft, a cyclone, a pulverized coal pipe, an inner shaft pipe, a gas inner pipe, a gas outer pipe, an outer shaft pipe and an outer air pipe which are arranged in sequence from inside to outside; the ignition device comprises a central shaft, a cyclone, a coal powder pipe, an inner shaft pipe, a gas inner pipe, a gas outer pipe, a second gas channel, an ignition channel, an inner cyclone air channel, an outer cyclone air channel, an inner axial flow air channel, a first gas channel, a second gas channel and an outer axial flow air channel, wherein the ignition channel is arranged in the central shaft, the inner cyclone air channel is arranged between the central shaft and the cyclone, the outer cyclone air channel is arranged between the cyclone and the coal powder pipe, the coal powder channel is arranged between the coal powder pipe and the inner shaft pipe, the inner axial flow air channel is arranged between the inner shaft pipe and the gas inner pipe, the first gas channel is arranged between the gas inner pipe and the gas outer pipe, the second gas channel is arranged between the gas outer pipe and the outer axial flow air channel, and the outer axial flow air channel is arranged between the outer shaft and the outer pipe.

2. The seven-channel combustor nozzle of claim 1, wherein: inner shaft air outlet grooves are uniformly distributed at the front end of the outer circumferential surface of the inner shaft tube, and the flow direction of the inner shaft air outlet grooves is parallel to the axial direction of the inner shaft tube; the inner surface of the gas inner pipe is in a cylindrical hole shape; the front end of the outer shaft tube is an outer shaft wind head with a conical outer surface, the front end of the outer shaft wind head is large in diameter, the rear end of the outer shaft wind head is small in diameter, an outer shaft wind outlet groove is formed in the outer shaft wind head along the circumference and is a part of a cylindrical hole, and the axis of the outer shaft wind outlet groove is parallel to the axis of the outer shaft tube; the inner surface of the outer air duct is cylindrical and is matched with the outer surface of the outer shaft tube to form an outer axial flow air duct.

3. A burner comprising a seven-channel burner nozzle as claimed in any one of claims 1 to 2, wherein: comprises the nozzle and a rear pipeline connected with the nozzle; the rear pipeline comprises a central pipeline, a first air pipeline, a second air pipeline, a pulverized coal pipeline, a third air pipeline, an inner gas pipeline, an outer gas pipeline and a fourth air pipeline from inside to outside; the central shaft of the nozzle is connected with the central pipeline; the cyclone is connected with the first air pipeline; the pulverized coal pipe is connected with the second air pipeline; the inner shaft tube is connected with the pulverized coal pipeline, the gas inner tube is connected with the third air pipeline, the gas outer tube is connected with the inner gas pipeline, the outer shaft tube is connected with the outer gas pipeline, and the outer air tube is connected with the fourth air pipeline.

4. The burner of claim 3, wherein: the rear pipeline also comprises a main air supply pipeline communicated with compressed air, and the main air supply pipeline is provided with a first air supply pipeline, a second air supply pipeline, a third air supply pipeline and a fourth air supply pipeline which are respectively connected with the first air pipeline, the second air pipeline, the third air pipeline and the fourth air pipeline through valves; the rear ends of the inner gas pipeline and the outer gas pipeline are respectively communicated with a first gas inlet and a second gas inlet; a pulverized coal inlet is arranged at the rear end of the pulverized coal pipeline, and telescopic joints driven to stretch by a driving mechanism are respectively arranged between the rear end of the first air pipeline and the central pipeline, between the rear end of the second air pipeline and the first air pipeline, and between the fourth air pipeline and the outer gas pipeline; at least one telescopic joint is arranged on the main air supply pipeline.

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