CN218494984U - Rotary kiln combustor welded with wear-resisting plates - Google Patents

Abstract

The utility model discloses a rotary kiln burner welded with wear-resisting plates, belonging to the technical field of rotary kiln burners and comprising an ignition pipeline; the coal air inner cylinder is sleeved on the periphery of the ignition pipeline and is coaxial with the ignition pipeline; the coal air outer cylinder is sleeved on the periphery of the coal air inner cylinder and is coaxial with the ignition pipeline, a coal air channel is formed between the coal air inner cylinder and the coal air outer cylinder, and the coal air channel is provided with a coal air inlet and a coal air outlet which are arranged oppositely; and a plurality of wear-resistant concentric plates which are welded on the periphery of the coal air inner cylinder and distributed in an annular array by taking the axis of the ignition channel as the center, and a surfacing layer is arranged on the surface of the wear-resistant concentric plates departing from the coal air outlet. The performance of the burner for resisting coal wind abrasion is improved, the service life is prolonged, and the symmetry and the stability of the structure are kept.

Description

Rotary kiln combustor welded with wear-resisting plates

Technical Field

The utility model belongs to the technical field of the rotary kiln combustor, concretely relates to welding has rotary kiln combustor of antifriction plate.

Background

The rotary kiln combustor sprays coal dust from a coal air channel from inside to outside according to a certain diffusion angle, fully mixes the coal dust with axial air, rotary air and central air, and ignites the mixture to combust, and is widely applied to the cement production industry at present.

The patent No. 200920289762.2 discloses a pulverized coal and gas fuel mixed combustion burner for a rotary kiln, wherein six channels of axial flow wind, rotational flow wind, coal gas, coal wind, central wind and ignition are sequentially arranged at the nozzle head part of the burner from outside to inside; the combustor body is respectively provided with an axial flow air outlet section adjusting device, a rotational flow air outlet section adjusting device and a coal air outlet section adjusting device, and a central air end cover plate adjusting device; the combustor is provided with a clean air side air pipe, and the clean air side air pipe is provided with two side air pipe adjusting and compensating devices.

In the above patent, because buggy needs to mix with circumference wind and central wind, buggy density is big, and in the operation process, it is serious to wash the head of combustor, often can be serious at the head damage.

SUMMERY OF THE UTILITY MODEL

The utility model provides a welding has rotary kiln combustor of antifriction plate for solve the serious problem of present rotary kiln combustor wearing and tearing.

In order to solve the technical problem, the technical scheme of the utility model is that: a rotary kiln combustor welded with a wear-resistant plate comprises an ignition pipeline;

the coal air inner cylinder is sleeved on the periphery of the ignition pipeline and is coaxial with the ignition pipeline;

the coal air outer cylinder is sleeved on the periphery of the coal air inner cylinder and is coaxial with the ignition pipeline, a coal air channel is formed between the coal air inner cylinder and the coal air outer cylinder, and the coal air channel is provided with a coal air inlet and a coal air outlet which are arranged oppositely;

and a plurality of wear-resistant concentric plates which are welded on the periphery of the coal air inner cylinder and distributed in an annular array by taking the axis of the ignition channel as the center, and a surfacing layer is arranged on the surface of the wear-resistant concentric plates departing from the coal air outlet.

Specifically, the height of the surfacing layer is more than or equal to 8mm.

Specifically, the far end of the surfacing layer, which faces away from the wear-resistant concentric plate, is arc-shaped.

Specifically, the welding material of the overlay is a cobalt-based alloy.

Specifically, the plurality of wear-resistant concentric plates are perpendicular to a tangent line passing through a welding point of the wear-resistant concentric plates and the coal air inner cylinder.

Specifically, the welding position of the wear-resistant concentric plate and the coal air inner cylinder is provided with a 3mm extending part.

Specifically, the coal air burner also comprises a central air channel formed between the ignition pipeline and the coal air inner cylinder;

the central wind end cover plate is arranged at the outlet of the central wind channel;

the spiral wind barrel is sleeved on the periphery of the coal wind outer barrel;

and the axial air duct is sleeved on the periphery of the coal air outer barrel.

Specifically, the lengths of the ignition pipeline, the coal air inner cylinder, the coal air outer cylinder, the rotary air cylinder and the axial air cylinder are sequentially increased.

The technical scheme provided by the utility model compare with prior art and have following advantage:

1. the wear-resistant concentric plate is additionally arranged in the coal air channel, and the surfacing layer is welded on the wear-resistant concentric plate, so that the coal air wear resistance of the burner is improved, the damage of pulverized coal to the head of the burner is reduced, and the service life of the burner is prolonged;

2. the wear-resistant concentric plates are annularly distributed in the coal air channel, so that the coal air channel can be supported, the channel is prevented from being compressed and narrowed, the coal air inner cylinder and the ignition channel can be kept coaxial, and the symmetry and the stability of the combustor structure are improved.

Drawings

FIG. 1 is an overall structure diagram of a rotary kiln burner with a wear-resisting plate welded therein according to an embodiment of the present invention;

FIG. 2 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 1 in accordance with the present invention;

FIG. 3 is a connection diagram of the wear-resistant plate and the coal air inner cylinder in the embodiment of the present invention;

fig. 4 is a cross-sectional view taken along line B-B of fig. 3 in accordance with the present invention;

fig. 5 is a wear plate structure diagram in an embodiment of the present invention.

Shown in the figure:

1. an ignition conduit; 2. an inner barrel of coal air; 3. a coal air outer cylinder; 4. rotating the wind barrel; 5. an axial air duct; 6. a central wind end cover plate; 61. a through hole; 7. a wear plate; 71. a wear-resistant concentric plate; 72. overlaying a welding layer; 8. and (5) machining allowance.

Detailed Description

For ease of understanding, the rotary kiln burner with the wear plate welded thereto is described below with reference to examples, which are intended to illustrate the present invention and are not intended to limit the scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations and positional relationships based on the orientation and positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "connected" are to be interpreted broadly, and may be, for example, a fixed connection, a detachable 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 meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 to 2, a rotary kiln burner welded with a wear-resistant plate comprises an ignition pipeline 1, wherein an oil pipe provided with an atomizer nozzle or a gas pipe provided with an igniter is inserted into the ignition pipeline 1, the atomizer nozzle is used for igniting oil mist sprayed from the oil pipe, the igniter is used for igniting natural gas output from the gas pipe, and flame generated after ignition ignites coal air mixed with pulverized coal;

the coal air inner cylinder 2, the coal air outer cylinder 3, the rotary air cylinder 4 and the axial air cylinder 5 are sequentially sleeved from inside to outside the ignition pipeline 1, the coal air inner cylinder 2, the coal air outer cylinder 3, the rotary air cylinder 4 and the axial air cylinder 5 are coaxial with the ignition pipeline 1, the lengths of the ignition pipeline 1, the coal air inner cylinder 2, the coal air outer cylinder 3, the rotary air cylinder 4 and the axial air cylinder 5 are sequentially increased, a central air channel A for central air circulation is formed between the ignition pipeline 1 and the coal air inner cylinder 2, a central air end cover plate 6 provided with a through hole 61 is arranged at the outlet of the central air channel A, and the through hole 61 is used for central air circulation; a coal air channel B for the circulation of coal air mixed with coal powder is formed between the coal air inner cylinder 2 and the coal air outer cylinder 3, the coal air channel B is provided with a coal air inlet and a coal air outlet which are arranged oppositely, the coal air mixed with the coal powder enters the coal air channel B from the coal air inlet, and the coal air outlet discharges the coal air channel B; a spiral wind channel C for the circulation of spiral wind is formed between the coal wind outer barrel 3 and the spiral wind barrel 4, and an axial wind channel D for the circulation of axial wind is formed between the spiral wind barrel 4 and the axial wind barrel 5; the flowing directions of the central wind, the rotational wind and the axial wind are all consistent with the flowing direction of the coal wind.

As shown in fig. 3 to 5, four wear-resistant plates 7 are arranged in the coal air pipeline, one ends of the four wear-resistant plates 7 are welded to the coal air inner cylinder 2, the other ends of the four wear-resistant plates are welded to the coal air outer cylinder 3, the welded wear-resistant plates 7 are perpendicular to a tangent line passing through a welding point between the wear-resistant plate 7 and the coal air inner cylinder 2, the four wear-resistant plates 7 are distributed in the coal air pipeline in an annular array manner, the four wear-resistant plates 7 are of an integral structure, and a central line of the integral structure is overlapped with an axis of the ignition channel; the wear-resistant plate 7 comprises a wear-resistant concentric plate 71 and a surfacing layer 72, the surfacing layer 72 is welded on the side, away from the coal air outlet, of the wear-resistant concentric plate 71, the welding material of the surfacing layer 72 is cobalt-based alloy, the distance between the far end, away from the wear-resistant concentric plate 71, of the surfacing layer 72 and the near end, in contact with the wear-resistant concentric plate 71, of the surfacing layer 72 is a height h, the height h is not less than 8mm, in the embodiment, the height h =8mm, the thickness of the plate body of the wear-resistant concentric plate 71 is 10mm, and the hardness of the wear-resistant concentric plate 71 facing the wind direction is guaranteed; the ports of the coal air inner cylinder 2 and the coal air outer cylinder 3 in the air incoming direction are opened outwards, air openings are enlarged, coal air is guided to enter the combustor conveniently, the far end of the surfacing layer 72, which deviates from the wear-resistant concentric plate 71, is arc-shaped, and the wind resistance of the surfacing layer 72 to the coal air is reduced.

Assembling; adopt the plasma cutting mode under water cut out with 2 welding departments of coal wind inner tube have the 8 plate bodys of machining allowance of 3mm to there is 8mm surfacing layer 72 of adjacent surface surfacing of 8 place faces of machining allowance at the plate body, form antifriction plate 7, then press close to the outer wall of firing the passageway with four wear-resisting concentric plate 71 bodies one side that has 8 of machining allowance, the welding mode is all fixed it on firing the passageway outer wall, according to 8 concentricity of adjusting antifriction plate 7 of 3mm machining allowance during the welding, guarantee the size, carry out the rotary kiln combustor equipment again.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: it is to be understood that modifications may be made to the above-described arrangements in the embodiments or equivalents may be substituted for some or all of the features thereof without departing from the scope of the present invention.

Claims (8)

1. A rotary kiln combustor welded with wear-resisting plates is characterized by comprising an ignition pipeline;

the coal air inner cylinder is sleeved on the periphery of the ignition pipeline and is coaxial with the ignition pipeline;

the coal air outer cylinder is sleeved on the periphery of the coal air inner cylinder and is coaxial with the ignition pipeline, a coal air channel is formed between the coal air inner cylinder and the coal air outer cylinder, and the coal air channel is provided with a coal air inlet and a coal air outlet which are arranged oppositely;

and a plurality of wear-resistant concentric plates which are welded on the periphery of the coal air inner cylinder and distributed in an annular array by taking the axis of the ignition channel as the center, wherein the surface of the wear-resistant concentric plates departing from the coal air outlet is provided with a surfacing layer.

2. A rotary kiln burner welded with wear plates as in claim 1, wherein the height of the weld-up layer is greater than or equal to 8mm.

3. A rotary kiln burner with a welded wear plate as in claim 2, wherein the far end of the weld overlay facing away from the wear concentric plate is curved.

4. A rotary kiln burner welded with wear plates as in claim 1, wherein the weld material of the weld overlay is a cobalt based alloy.

5. A rotary kiln burner with a wear plate welded thereto as claimed in claim 1, wherein a plurality of said wear concentric plates are perpendicular to a tangent line passing through a weld point of the wear concentric plates with the inner barrel of the coal air.

6. A rotary kiln burner welded with wear plates as in claim 1, wherein a 3mm machining allowance is provided at the welding position of the wear-resistant concentric plates and the coal air inner cylinder.

7. The rotary kiln burner welded with wear plates as claimed in claim 1, further comprising a central air channel formed between the ignition duct and the coal air inner cylinder;

the central wind end cover plate is arranged at the outlet of the central wind channel;

the spiral wind barrel is sleeved on the periphery of the coal wind outer barrel;

and the axial air duct is sleeved on the periphery of the coal air outer barrel.

8. The rotary kiln burner welded with wear plates as claimed in claim 7, wherein the lengths of the ignition pipeline, the coal air inner barrel, the coal air outer barrel, the rotary air cylinder and the axial air cylinder are increased in sequence.

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