CN220870857U - Pulverized coal burner of cement kiln - Google Patents

Abstract

The application relates to the field of coal combustion equipment, in particular to a pulverized coal burner of a cement kiln, which comprises a shell, wherein an air chamber and a combustion chamber are arranged in the shell, one end of the shell is arranged in an opening manner, an air inlet pipe is connected to the shell, the air inlet pipe is communicated with the air chamber, a coal inlet pipe is connected to the shell, one end part of the coal inlet pipe extends into the air chamber, a mounting frame is arranged on the air chamber, a plurality of air guide blades are arranged in the mounting frame, the air guide blades are obliquely arranged, one end of each air guide blade is connected to the inner wall of the mounting frame, the other ends of the plurality of air guide blades are mutually connected with a connecting ring, the end part of the coal inlet pipe penetrates through the connecting ring, pulverized coal enters the combustion chamber through the coal inlet pipe, and air enters the combustion chamber through the air guide blades.

Description

Pulverized coal burner of cement kiln

Technical Field

The application relates to the field of coal combustion equipment, in particular to a pulverized coal burner of a cement kiln.

Background

Cement is a building material which is a grey powder formed by calcining limestone, clay and other raw materials at high temperatures. Cement has good adhesion and plasticity, and can be mixed with water to form a hard and durable material. In the current cement manufacturing process, cement kilns are required for production, where the materials (typically limestone, clay and other raw materials) are heated to an elevated temperature to melt and mix them together. This process is called calcination. After calcination, the material is cooled and broken into small pieces, which are then ground into fine powder, finally making cement. In the production process of cement kilns, coal powder is generally combusted by using a coal powder burner to provide heat for the cement kilns, but the coal powder and air of the conventional coal powder burner are not uniformly mixed, and the coal powder is insufficiently combusted, so that further improvement is needed.

Disclosure of Invention

The embodiment of the application aims to provide a pulverized coal burner of a cement kiln, which can solve the technical problem of uneven mixing of pulverized coal and air.

The embodiment of the application provides a pulverized coal burner of a cement kiln, which adopts the following technical scheme,

The utility model provides a coal burner of cement kiln, includes the shell, be provided with air cavity and combustion chamber in the shell, the one end of shell is the opening setting, connect the intake pipe on the shell, the intake pipe communicate in air cavity, be connected with into the coal pipe on the shell, advance the one end tip of coal pipe and extend to in the air cavity, be provided with the installing frame on the air cavity, be provided with a plurality of wind-guiding blades in the installing frame, wind-guiding blade is the slope setting, wind-guiding blade's one end connect in the inner wall of installing frame, a plurality of wind-guiding blade's the other end interconnect has the go-between, advance the tip of coal pipe and pass through the go-between, the buggy passes through advance the coal pipe to enter into in the combustion chamber, the air by air cavity passes through wind-guiding blade gets into in the combustion chamber.

Further, the inner wall of the connecting ring is provided with internal threads, the outer circumferential surface of the end part of the coal inlet pipe is provided with external threads, and the connecting ring is in threaded connection with the end part of the coal inlet pipe.

Further, a sliding sleeve is arranged in the air chamber, the mounting frame is in plug-in fit with the sliding sleeve, and when the connecting ring is in threaded connection with the coal inlet pipe, the mounting frame is plugged in the sliding sleeve.

Further, a limiting ring is circumferentially arranged on the inner wall of the sliding sleeve, and the mounting frame is attached to the limiting ring.

Further, a plurality of support plates are connected between the sliding sleeve and the inner wall of the air chamber.

Further, a plurality of through holes are formed in the mounting frame, and the through holes are communicated with the air chamber and the combustion chamber.

Further, a plurality of refractory bricks are arranged in the combustion chamber.

Further, a plurality of empty slots are circumferentially arranged on the shell at intervals, and the empty slots are arranged along the length direction of the shell.

The utility model has the beneficial effects that:

According to the pulverized coal burner provided by the utility model, air enters the combustion chamber from the air chamber, and the air generates vortex under the guiding action of the air guide blade, so that the air and the pulverized coal are mixed more uniformly, and the pulverized coal is combusted more fully.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an overall structure of an embodiment of the present utility model;

FIG. 2 is a schematic cross-sectional view of an embodiment of the present utility model;

FIG. 3 is an exploded view of an embodiment of the present utility model;

The reference numerals are respectively: 1. a housing; 11. an air chamber; 12. a combustion chamber; 13. a sliding sleeve; 131. a limiting ring; 132. a support plate; 14. refractory bricks; 15. a hollow groove; 2. an air inlet pipe; 3. a coal inlet pipe; 4. a mounting frame; 41. wind guiding blades; 42. a connecting ring; 43. and a through hole.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the application, as presented in the figures, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present application, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or those that are conventionally put in use of the product of the application, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," "overhang," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

The embodiment of the application discloses a pulverized coal burner of a cement kiln

Referring to fig. 1 to 3, a pulverized coal burner of a cement kiln comprises a housing 1, wherein the housing 1 is cylindrically provided, an air chamber 11 and a combustion chamber 12 are arranged in the housing 1, one end of the housing 1 is provided with an opening, the air chamber 11 is positioned far away from the opening end of the housing 1, the combustion chamber 12 is positioned close to the opening end of the housing 1, and when pulverized coal is combusted in the combustion chamber 12, heat is transmitted to the next process from the opening of the housing 1. Meanwhile, the shell 1 is connected with the air inlet pipe 2, one end of the air inlet pipe 2 extends into the shell 1 and is communicated with the air chamber 11, the shell 1 is connected with the coal inlet pipe 3, and one end of the coal inlet pipe 3 extends into the air chamber 11. During combustion, the coal inlet pipe 3 conveys a mixture of coal dust and air into the combustion chamber 12, the air inlet pipe 2 conveys air into the air chamber 11, the air enters the combustion chamber 12 from the air chamber 11, and then the coal dust and the air are mixed in the combustion chamber 12 for combustion.

In addition, be provided with the installing frame 4 on the air chamber 11, the installing frame 4 is the ring form setting, be provided with a plurality of wind-guiding blades 41 in the installing frame 4, a plurality of wind-guiding blades 41 are along the circumferencial direction interval arrangement of installing frame 4, wind-guiding blades 41 are the slope setting, the one end of wind-guiding blades 41 is connected in the inner wall of installing frame 4, the other end interconnect of a plurality of wind-guiding blades 41 has go-between 42, the tip and the outer peripheral face welded connection of go-between 42 of wind-guiding blades 41, installing frame 4 is located the juncture of air chamber 11 and combustion chamber 12, the tip of advance coal pipe 3 then passes in go-between 42, the air is then passed through wind-guiding blades 41 by air chamber 11 and is got into combustion chamber 12, and the air then produces the vortex under the direction effect of wind-guiding blades 41, and advance coal pipe 3 in the central point of a plurality of wind-guiding blades 41, thereby make air and buggy mix more even, thereby make buggy burning more abundant. Meanwhile, the mounting frame 4 is provided with a plurality of through holes 43, the through holes 43 penetrate through the surfaces of two opposite sides of the mounting frame 4, the through holes 43 are communicated with the air chamber 11 and the combustion chamber 12, and part of air can enter the combustion chamber 12 through the through holes 43, so that a separation layer is formed between the combustion chamber 12 and flame generated by pulverized coal combustion, a certain heat insulation effect is achieved, excessive heat is prevented from being conducted out from the inner wall of the combustion chamber 12, and heat waste is caused.

In addition, the inner wall of the connecting ring 42 is provided with internal threads, the outer circumferential surface of the end part of the coal inlet pipe 3 is provided with external threads, and the connecting ring 42 is in threaded connection with the end part of the coal inlet pipe 3, so that the mounting frame 4 and the coal inlet pipe 3 can be firmly connected together, and meanwhile, when the air guide blade 41 is damaged, the mounting frame 4 can be conveniently detached for maintenance and replacement. Simultaneously, be provided with sliding sleeve 13 in the air chamber 11, sliding sleeve 13 sets up along the axial length direction of shell 1, and installation frame 4 and sliding sleeve 13 grafting cooperation, and when go-between 42 threaded connection in advance coal pipe 3, installation frame 4 grafting in sliding sleeve 13, sliding sleeve 13 can play certain supporting role to installation frame 4. Simultaneously, the inner wall circumference of the sliding sleeve 13 is welded with a limiting ring 131 in a surrounding manner, the mounting frame 4 is attached to the limiting ring 131, and the limiting ring 131 can prevent the mounting frame 4 from excessively sliding into the sliding sleeve 13. A plurality of support plates 132 are welded between the sliding sleeve 13 and the inner wall of the air chamber 11, and the plurality of support plates 132 are arranged at intervals along the circumferential direction of the sliding sleeve 13. Meanwhile, the inner wall of the combustion chamber 12 is fixedly provided with a plurality of refractory bricks 14, and the refractory bricks 14 can improve the heat resistance of the shell 1, so that the shell 1 is not easy to burn out, and heat loss can be further isolated. In addition, a plurality of empty slots 15 are circumferentially arranged at intervals on the end face of the housing 1, the empty slots 15 are arranged along the length direction of the housing 1, and the empty slots 15 can reduce the weight of the housing 1 and improve the mechanical strength of the housing 1.

The implementation principle of the pulverized coal burner of the cement kiln provided by the embodiment of the application is as follows: the coal inlet pipe 3 conveys the mixture of coal dust and air into the combustion chamber 12, the air inlet pipe 2 conveys the air into the air chamber 11, the air enters the combustion chamber 12 from the air chamber 11, and the air is subjected to vortex under the guiding action of the air guide blades 41, so that the air and the coal dust are more uniformly mixed, the coal dust is more fully combusted, and then the coal dust and the air are mixed in the combustion chamber 12 for combustion. After the pulverized coal is burned in the combustion chamber 12, heat is transferred from the opening of the housing 1 to the next process.

The above is only a preferred embodiment of the present application, and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (8)

1. A pulverized coal burner of a cement kiln, characterized in that: the air inlet pipe is connected to the outer shell, the air inlet pipe is communicated to the air chamber, a coal inlet pipe is connected to the outer shell, one end of the coal inlet pipe extends to the air chamber, an installation frame is arranged on the air chamber, a plurality of air guide blades are arranged in the installation frame, the air guide blades are obliquely arranged, one ends of the air guide blades are connected to the inner wall of the installation frame, a plurality of connecting rings are connected to one another of the air guide blades, the end of the coal inlet pipe penetrates through the connecting rings, coal dust enters the combustion chamber through the coal inlet pipe, and air passes through the air guide blades to enter the combustion chamber.

2. The pulverized coal burner of a cement kiln according to claim 1, wherein the inner wall of the connecting ring is provided with internal threads, the outer circumferential surface of the end portion of the coal inlet pipe is provided with external threads, and the connecting ring is in threaded connection with the end portion of the coal inlet pipe.

3. The pulverized coal burner of a cement kiln according to claim 2, wherein a sliding sleeve is arranged in the air chamber, the mounting frame is in plug-in fit with the sliding sleeve, and when the connecting ring is in threaded connection with the coal inlet pipe, the mounting frame is plugged in the sliding sleeve.

4. A pulverized coal burner for a cement kiln according to claim 3, wherein a limit ring is circumferentially arranged on the inner wall of the sliding sleeve, and the mounting frame is attached to the limit ring.

5. A pulverized coal burner for a cement kiln according to claim 3, characterized in that a plurality of support plates are connected between the sliding sleeve and the inner wall of the air chamber.

6. The pulverized coal burner of a cement kiln according to claim 1, wherein a plurality of through holes are formed in the mounting frame, and the through holes are communicated with the air chamber and the combustion chamber.

7. A pulverized coal burner for a cement kiln according to claim 1, characterized in that a plurality of refractory bricks are arranged in the combustion chamber.

8. The pulverized coal burner of a cement kiln according to claim 1, wherein a plurality of empty slots are circumferentially arranged on the housing at intervals, and the empty slots are arranged along the length direction of the housing.