CN219550511U - Diffusion type burner for decomposing furnace - Google Patents

Abstract

The utility model discloses a diffusion type combustor used for a decomposing furnace, which relates to the technical field of combustors and comprises a coal feeding pipe extending to the inner middle part of the decomposing furnace, wherein a coal injection head is arranged at the lower end of the coal feeding pipe, the lower end of the coal feeding pipe is bent and is rotatably provided with the coal injection head, a rotational flow mechanism rotated by coal powder flow is arranged in the coal injection head, and coal injection holes for circumferentially and uniformly injecting coal powder at the inner middle part of the decomposing furnace are formed in the coal injection head. The coal injection head is arranged in the middle of the decomposing furnace and is vertical to the horizontal plane. The coal injection hole comprises a bottom hole positioned at the lowest end of the coal injection head and a plurality of side holes distributed on the side surface of the coal injection head. The utility model has reasonable structure, can lead the coal injection head to rotate at the lower end of the coal feeding pipe, and is matched with the bottom hole and the side hole arranged on the surface of the coal injection head, thereby being capable of uniformly and circumferentially diffusing the coal dust in the decomposing furnace, leading the coal dust to be uniformly mixed, being capable of fully burning in the decomposing furnace and having good use effect.

Description

Diffusion type burner for decomposing furnace

Technical Field

The utility model relates to the technical field of combustors, in particular to a diffusion type combustor for a decomposing furnace.

Background

The decomposing furnace is a new type of thermal equipment with simultaneous fuel burning, heat exchange and decomposing reaction, and through feeding preheated raw material, fuel in certain amount and hot gas in proper amount into the decomposing furnace, the raw material is suspended or boiled inside the furnace and is burnt at 900 deg.c and below, and the heat transfer and calcium carbonate decomposing process is completed at high speed.

At present, a burner of a decomposing furnace generally adopts two structures, one is a straight pipe, the structure is simple, and a heat-resistant steel pipe conveys coal to directly blow into the furnace through wind, and the straight pipe type coal injection pipe 01 is shown in figure 1; the other is to add a cyclone device at the outlet of the coal pipe to rotate the coal supply air, so as to increase the diffusion area of the coal supply air, specifically to a cyclone coal injection pipe 02 as shown in fig. 1.

In order to ensure uniform dispersion of pulverized coal, the burner structure is generally provided with a plurality of straight cylinder coal injection pipes 01 in the circumferential direction in the decomposing furnace, but the burner structure has the problems that pulverized coal is more around the installation point and pulverized coal is less at other positions no matter how the burner structure is installed, so that the actual use effect is poor. In addition, although the swirl type coal injection pipe 02 has a better diffusion effect than the straight type coal injection pipe 01, the installation mode is the same, the problem is not fundamentally solved, and the problem that coal dust cannot be uniformly mixed and the combustion is insufficient still exists.

Therefore, the utility model provides a diffusion type burner for a decomposing furnace to solve the technical problems.

Disclosure of Invention

The utility model aims to provide a diffusion type burner for a decomposing furnace, which can ensure that the coal injection head can rotate at the lower end of the coal feeding pipe and is matched with bottom holes and side holes formed on the surface of the coal injection head through the matching of the coal injection head and the coal feeding pipe and the structural arrangement of the coal injection head, so that coal dust can be uniformly mixed in the decomposing furnace and can be fully combusted in the decomposing furnace, and compared with the existing burner, the diffusion type burner has a good using effect.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a diffusion formula combustor that decomposing furnace used, includes the coal feed pipe that extends to middle part in the decomposing furnace, the coal injection head is installed to the lower extreme of coal feed pipe, the lower extreme of coal feed pipe is crooked, and rotatory install the coal injection head, be provided with in the coal injection head and receive the buggy stream to carry out pivoted whirl mechanism, the last coal injection hole that is used for evenly spouting buggy in middle part circumference in the decomposing furnace that has seted up of coal injection head.

As a further preferable scheme, the coal injection head is arranged in the middle of the decomposing furnace and is vertical to the horizontal plane.

As a further preferable scheme, the coal injection hole comprises a bottom hole positioned at the lowest end of the coal injection head and a plurality of side holes distributed on the side surface of the coal injection head.

As a further preferable mode, a plurality of the coal injection holes are provided, and the sum of the hole areas of the plurality of the coal injection holes is equal to the cross-sectional area of the coal feeding pipe.

As a further preferable scheme, a butt joint cylinder is constructed at the top of the coal injection head, the butt joint cylinder is inserted into the port of the coal conveying pipe, a groove is annularly formed in the outer edge surface of the butt joint cylinder, and a limit edge matched with the groove in a clamping manner is annularly constructed on the inner wall of the port of the coal conveying pipe.

As a further preferable mode, the cyclone mechanism is fixed in the butt joint barrel and is communicated with the coal feeding pipe.

As a further preferable mode, the swirling mechanism is a plurality of spiral inclined blades fixed in the butt joint barrel.

In summary, the utility model has the technical effects and advantages that:

the utility model benefits from the rotary installation of the coal feeding pipe and the coal injection head, and the cyclone mechanism arranged in the butt joint barrel at the inner top of the coal injection head, so that the coal injection head can rotate at the lower end of the coal feeding pipe, and simultaneously, the bottom holes and the side holes formed on the surface of the coal injection head are matched, so that the coal dust can be uniformly and circumferentially diffused in the decomposing furnace, the coal dust can be uniformly mixed, and the coal dust can be fully combusted in the decomposing furnace, and the use effect is good.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other 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 two burner coal injection pipes in the prior art;

FIG. 2 is a schematic diagram of the structure of the present utility model;

FIG. 3 is a schematic diagram of a coal injection head according to the present utility model;

FIG. 4 is a schematic view showing the structure of the coal injection head according to the present utility model;

FIG. 5 is a schematic view of the internal structure of the present utility model;

FIG. 6 is a schematic diagram of another embodiment of the present utility model;

fig. 7 is a cross-sectional view of another embodiment of the present utility model.

In the figure: 01. straight cylinder coal injection pipe; 02. a cyclone coal injection pipe; 1. a coal feeding pipe; 101. limit edges; 2. a coal injection head; 3. coal injection holes; 301. a bottom hole; 302. a side hole; 4. a butt joint barrel; 401. a groove; 5. a rotational flow mechanism; 6. a coal outlet head; 601. a coal outlet pipe; 7. a coal outlet hole; 701. a first hole; 702. a second hole; 8. a connecting pipe; 9. a rotational flow device.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Examples: referring to fig. 2, fig. 3, fig. 4 and fig. 5, a diffusion burner for a decomposing furnace is shown, and comprises a coal feeding pipe 1 extending to the middle part in the decomposing furnace, wherein the lower end of the coal feeding pipe 1 is bent and rotatably provided with a coal injection head 2, in specific implementation, the top of the coal injection head 2 is provided with a butt joint cylinder 4, the butt joint cylinder 4 is inserted into a port of the coal feeding pipe 1, the outer edge surface of the butt joint cylinder 4 is provided with a groove 401 in a ring shape, and the inner wall of the port of the coal feeding pipe 1 is provided with a limit rib 101 in clamping fit with the groove 401 in a ring shape, so that the coal injection head 2 can rotate at the lower end of the coal feeding pipe 1.

The coal injection head 2 is arranged in the middle part in the decomposing furnace and is vertical to the horizontal plane, a rotational flow mechanism 5 which is rotated by the flow of coal powder is arranged in the coal injection head 2, the rotational flow mechanism 5 is fixed in the butt joint barrel 4 and is communicated with the coal injection head 2, in the embodiment, the rotational flow mechanism 5 is a plurality of spiral inclined blades fixed in the butt joint barrel 4, and when the coal powder passes through the coal injection head 2 in the coal injection tube 1, the butt joint barrel 4 is driven to rotate with the coal injection head 2.

Meanwhile, the coal injection head 2 is provided with coal injection holes 3 for uniformly injecting pulverized coal in the middle part in the decomposing furnace in the circumferential direction, the coal injection holes 3 comprise bottom holes 301 positioned at the lowest end of the coal injection head 2, and a plurality of side holes 302 distributed on the side face of the coal injection head 2, and the coal injection holes 3 are provided in a plurality, in this embodiment, the coal injection holes 3 are provided with thirteen, and the total hole area of the thirteen coal injection holes 3 is equal to the cross-sectional area of the coal feeding pipe 1 so as to ensure that the injected wind speed is the same as the transported wind speed.

Referring to fig. 6 and 7, in another embodiment of the present utility model, a coal outlet head 6 is rotatably installed at the lower end of the coal feeding pipe 1, a coal outlet hole 7 is formed on the surface of the coal outlet head 6, the coal outlet hole 7 includes a first hole 701 located at the lower end of the coal outlet head 6, and a plurality of second holes 702 distributed on the side surface of the coal outlet head 6, which corresponds to the cooperation of the coal feeding pipe 1, the coal injection head 2 and the coal injection hole 3 in the above embodiment, and is different in that a plurality of coal outlet pipes 601 are installed in the coal outlet head 6, one end of the coal outlet pipe 601 is communicated with the first hole 701 or the second hole 702, and the other end is communicated with a chamber in the coal outlet head 6, which is communicated with the coal feeding pipe 1.

Meanwhile, in this other embodiment, a connection pipe 8 that is in running fit with the lower end of the coal pipe 1 is fixed on the top of the coal outlet head 6 (in a specific implementation, a rotational connection manner between the connection pipe 8 and the coal pipe 1 is the same as that between the butt joint barrel 4 and the coal pipe 1 in the above embodiment), and a cyclone device 9 that is rotated by the flow of pulverized coal is configured in the connection pipe 8, which corresponds to the cooperation between the butt joint barrel 4 and the cyclone mechanism 5 in the above embodiment, and is different in that the cyclone device 9 is a plate structure with a plurality of spiral through holes.

The working principle of the utility model is as follows: when the diffusion type burner is used in the decomposing furnace, the coal feeding pipe 1 is connected with the coal feeding device, coal dust is introduced into the coal injection head 2 through the coal feeding pipe 1, and when the coal dust flows through the cyclone mechanism 5 in the butt joint barrel 4 at the top of the coal injection head 2, the cyclone mechanism 5 is impacted to drive the cyclone mechanism 5 to rotate with the butt joint barrel 4 at the lower end of the coal feeding pipe 1, meanwhile, the coal dust can evenly spray out towards the decomposing furnace through the plurality of coal injection holes 3, circumferential diffusion is realized, and compared with the mixed coal dust which can be better in the prior art, the coal dust is fully combusted, and the using effect is good.

Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present utility model, and although the present utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present utility model.

Claims (7)

1. The utility model provides a diffusion formula combustor that decomposition furnace used, includes to extend to middle part in the decomposition furnace and send coal pipe (1), send the lower extreme of coal pipe (1) to install coal injection head (2), its characterized in that: the lower end of the coal feeding pipe (1) is bent, the coal injection head (2) is rotatably arranged, a rotational flow mechanism (5) which is rotated by coal powder flow is arranged in the coal injection head (2), and a coal injection hole (3) for uniformly injecting coal powder in the circumferential direction of the middle part in the decomposing furnace is formed in the coal injection head (2).

2. A diffusion burner for a decomposing furnace as claimed in claim 1, wherein: the coal injection head (2) is arranged in the middle of the decomposing furnace and is vertical to the horizontal plane.

3. A diffusion burner for a decomposing furnace as claimed in claim 1, wherein: the coal injection hole (3) comprises a bottom hole (301) positioned at the lowest end of the coal injection head (2), and a plurality of side holes (302) distributed on the side surface of the coal injection head (2).

4. A diffusion burner for a decomposing furnace as claimed in claim 3, wherein: the coal injection holes (3) are provided in a plurality, and the total hole area of the plurality of coal injection holes (3) is equal to the cross-sectional area of the coal feeding pipe (1).

5. A diffusion burner for a decomposing furnace as claimed in claim 1, wherein: the top of the coal injection head (2) is provided with a butt joint barrel (4), the butt joint barrel (4) is inserted into a port of the coal pipe (1), a groove (401) is formed in an annular mode on the outer edge surface of the butt joint barrel (4), and a limit edge (101) matched with the groove (401) in a clamping mode is formed in the annular mode on the inner wall of the port of the coal pipe (1).

6. A diffusion burner for a decomposing furnace as claimed in claim 5, wherein: the rotational flow mechanism (5) is fixed in the butt joint barrel (4) and is communicated with the coal conveying pipe (1).

7. A diffusion burner for a decomposing furnace as claimed in claim 6, wherein: the rotational flow mechanism (5) is a plurality of spiral inclined blades fixed in the butt joint barrel (4).