Diffusion type pulverized coal combustion device

Abstract

The utility model relates to the technical field of pulverized coal combustion devices, in particular to a diffusion type pulverized coal combustion device for a cement kiln decomposing furnace. In the using process of a traditional pulverized coal combustion device, due to the fact that pulverized coal is not evenly distributed, part of pulverized coal is not fully combusted in a furnace, energy is wasted, a large amount of harmful gas of carbon monoxide is easily generated, and therefore even dispersion and efficient combustion of fuel are inconvenient to achieve. The utility model provides a diffusion type pulverized coal combustion device. The diffusion type pulverized coal combustion device comprises a main pulverized coal feeding pipeline, a coal injection pipe, a connecting assembly, a coal feeding assembly, a mounting assembly, a reinforcing assembly, a coal uniformizing assembly and a coal injection assembly. Compared with a traditional pulverized coal combustion device in the using process, the pulverized coal combustion device sprays pulverized coal into the decomposing furnace through a plurality of sets of coal spraying structures, a plurality of fine pulverized coal spraying points are formed, the pulverized coal is evenly dispersed in the decomposing furnace and rapidly mixed with high-temperature gas, and therefore sufficient combustion of the pulverized coal is achieved; therefore, the purposes of uniform dispersion and efficient combustion can be achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of coal combustion device, especially to a diffusion type coal combustion device for cement kiln decomposing furnace. BACKGROUND

[0002] Coal combustion device (coal injection pipe) is a common device in cement kiln decomposing furnace, but most coal combustion devices are inconvenient to realize uniform dispersion and efficient combustion of fuel, affecting operation and use. In actual use, most coal injection pipes cannot uniformly disperse coal powder to the entire section of the decomposing furnace due to design limitations, leading to uneven combustion of coal powder in the furnace, easy to cause local high temperature, and further cause skinning phenomenon, affecting continuous and stable operation of the decomposing furnace. Due to uneven distribution of coal powder, partial coal powder is not fully combusted in the furnace, not only wasting energy, but also easily producing a large amount of carbon monoxide and other harmful gases, which is neither economical nor environmentally friendly. SUMMARY

[0003] In order to overcome the problem that most coal injection pipes cannot uniformly disperse coal powder to the entire section of the decomposing furnace due to design limitations, leading to uneven combustion of coal powder in the furnace, easy to cause local high temperature, and further cause skinning phenomenon, affecting continuous and stable operation of the decomposing furnace, due to uneven distribution of coal powder, partial coal powder is not fully combusted in the furnace, not only wasting energy, but also easily producing a large amount of carbon monoxide and other harmful gases, which cannot realize uniform dispersion and efficient combustion of fuel.

[0004] The technical scheme of the utility model is: a diffusion type coal combustion device, comprising a main coal powder inlet pipe, a coal injection pipe, a connecting assembly, a coal inlet assembly, a mounting assembly, a reinforcing assembly, a coal uniformizing assembly and a coal injection assembly; one end of the main coal powder inlet pipe is provided with the connecting assembly, one end of the connecting assembly is provided with the coal inlet assembly, a side wall of the coal inlet assembly is provided with the mounting assembly, a side wall of the main coal powder inlet pipe is provided with the reinforcing assembly, the other end of the main coal powder inlet pipe is provided with the coal injection pipe, the inside of the coal injection pipe is provided with the coal uniformizing assembly, one side of the coal uniformizing assembly is provided with the coal injection assembly.

[0005] As a preferred, the connecting assembly comprises a mounting sleeve, a mounting flange and a mounting hole; one end of the main coal powder inlet pipe is provided with the mounting sleeve, one side of the mounting sleeve is provided with the mounting flange, a side wall of the mounting flange is provided with the mounting hole, and the mounting hole is provided with multiple groups.

[0006] As a preferred, the coal inlet assembly comprises a support rib plate, a connecting flange and a coal powder inlet pipe; one side of the mounting flange is provided with the connecting flange, one side of the connecting flange is provided with the coal powder inlet pipe, a side wall of the coal powder inlet pipe is provided with the support rib plate, the support rib plate is provided with multiple groups, and the other mounting hole is provided on a side wall of the connecting flange.

[0007] As preferred, the mounting assembly comprises a mounting bolt and a mounting nut; the mounting hole is internally provided with the mounting bolt, one end of the mounting bolt is provided with the mounting nut, and the mounting nut is threadedly connected with the mounting bolt; the mounting bolt penetrates through the mounting flange and the connecting flange through the mounting hole, and is fastened at one end by the mounting nut.

[0008] As preferred, the reinforcing assembly comprises an anchor and a fin plate; the anchor is arranged on the side wall of the main pulverized coal inlet pipeline, and a plurality of groups of anchors are arranged; the fin plate is arranged on the side wall of the main pulverized coal inlet pipeline, and a plurality of groups of fin plates are arranged.

[0009] As preferred, the coal uniformizing assembly comprises a coal uniformizing chamber, a wear-resistant sheet and a partition plate; the coal uniformizing chamber is arranged in the internal of the coal injection pipe, the partition plate is arranged in the internal of the coal uniformizing chamber, and the wear-resistant sheet is arranged on the side wall of the partition plate.

[0010] As preferred, the coal injection assembly comprises a pulverized coal injection nozzle; the pulverized coal injection nozzle is arranged on the side wall of the coal injection pipe, and a plurality of groups of the pulverized coal injection nozzles are arranged; another pulverized coal injection nozzle is arranged on the main pulverized coal inlet pipeline.

[0011] The beneficial effects of the present application are as follows:

[0012] The installation assembly can fasten and install the coal inlet assembly and the connecting assembly, the pulverized coal firstly enters the internal of the main pulverized coal inlet pipeline through the coal inlet assembly, then enters the internal of the coal uniformizing assembly through the main pulverized coal inlet pipeline, is uniformly distributed to the internal of each coal injection assembly in the coal uniformizing assembly, and is injected into the decomposition furnace by the plurality of groups of coal injection assemblies, so that a plurality of small pulverized coal injection points are formed, the pulverized coal is uniformly dispersed in the decomposition furnace, and is rapidly mixed with the high-temperature gas, thereby realizing the full combustion of the pulverized coal. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 A first three-dimensional structure schematic view of the diffusion type pulverized coal combustion device is shown;

[0014] Figure 2 A first partial three-dimensional structure schematic view of the diffusion type pulverized coal combustion device is shown;

[0015] Figure 3 A second partial three-dimensional structure schematic view of the diffusion type pulverized coal combustion device is shown;

[0016] Figure 4 A third partial three-dimensional structure schematic view of the diffusion type pulverized coal combustion device is shown;

[0017] Explanation of reference signs: 1, connecting assembly; 2, coal feeding assembly; 3, mounting assembly; 4, reinforcing assembly; 5, coal uniformizing assembly; 6, coal injection assembly; 7, main coal powder feeding pipeline; 8, coal injection pipe; 101, mounting sleeve; 102, mounting flange; 103, mounting hole; 201, support rib plate; 202, connecting flange; 203, coal powder inlet pipe; 301, mounting bolt; 302, mounting nut; 401, anchor; 402, fin plate; 501, coal powder uniformizing chamber; 502, wear plate; 503, partition plate; 601, coal powder injection nozzle. DETAILED DESCRIPTION

[0018] The utility model is further explained in connection with the drawings and examples.

[0019] Please refer to Figure 1 The utility model provides a kind of example: a diffusion type coal powder combustion device, including main coal powder feeding pipeline 7, coal injection pipe 8, connecting assembly 1, coal feeding assembly 2, mounting assembly 3, reinforcing assembly 4, coal uniformizing assembly 5 and coal injection assembly 6;One end of main coal powder feeding pipeline 7 is provided with connecting assembly 1, one end of connecting assembly 1 is provided with coal feeding assembly 2, and mounting assembly 3 is arranged on the side wall of coal feeding assembly 2, reinforcing assembly 4 is arranged on the side wall of main coal powder feeding pipeline 7, the other end of main coal powder feeding pipeline 7 is provided with coal injection pipe 8, coal injection pipe 8 is provided with coal uniformizing assembly 5 inside, and coal injection assembly 6 is arranged on one side of coal uniformizing assembly 5.

[0020] Please refer to Figure 2The connecting assembly 1 comprises a mounting sleeve 101, a mounting flange 102 and a mounting hole 103. One end of the main pulverized coal inlet pipe 7 is provided with the mounting sleeve 101. The mounting sleeve 101 is provided with the mounting flange 102 on one side. The mounting flange 102 is provided with the mounting hole 103 on the side wall. The mounting hole 103 is provided with multiple groups. The coal inlet assembly 2 and the connecting assembly 1 can be fastened and installed through the mounting assembly 3. The coal inlet assembly 2 comprises a support rib plate 201, a connecting flange 202 and a pulverized coal inlet pipe 203. The mounting flange 102 is provided with the connecting flange 202 on one side. The connecting flange 202 is provided with the pulverized coal inlet pipe 203 on one side. The pulverized coal inlet pipe 203 is provided with the support rib plate 201 on the side wall. The support rib plate 201 is provided with multiple groups. Another mounting hole 103 is provided on the side wall of the connecting flange 202. The support rib plate 201 is used to enhance the structural strength of the connecting assembly 1 and ensure its stability during work. The mounting assembly 3 comprises a mounting bolt 301 and a mounting nut 302. The mounting hole 103 is provided with the mounting bolt 301 inside. The mounting bolt 301 is provided with the mounting nut 302 on one end. The mounting nut 302 is threadedly connected with the mounting bolt 301. The mounting bolt 301 penetrates the mounting flange 102 and the connecting flange 202 through the mounting hole 103 and is fastened at one end through the mounting nut 302. In this way, the mounting flange 102, the connecting flange 202 and the pulverized coal inlet pipe 203 and other components are firmly connected together to form a whole. The connecting assembly 1 is tightly matched through the mounting sleeve 101, the mounting flange 102, the connecting flange 202 and other components. The mounting bolt 301 and the mounting nut 302 are fastened to realize the reliable connection between the pulverized coal inlet pipe 203 and the main pulverized coal inlet pipe 7, ensuring the smooth conveying of the pulverized coal and the stable operation of the system.

[0021] Please refer to Figures 3-4In the embodiment, the reinforcing assembly 4 includes anchors 401 and fins 402; the anchors 401 are arranged on the side wall of the main pulverized coal pipeline 7, and multiple sets of anchors 401 are arranged on the side wall of the main pulverized coal pipeline 7; the fins 402 are arranged on the side wall of the main pulverized coal pipeline 7, and multiple sets of fins 402 are arranged on the side wall of the main pulverized coal pipeline 7; the anchors 401 and the fins 402 serve as the reinforcing assembly 4 and play an important role in supporting and stabilizing the main pulverized coal pipeline 7; they work together to ensure the safe and stable operation of the main pulverized coal pipeline 7 through fixing, bearing tension, enhancing structural strength, supporting, enhancing rigidity, preventing vibration, and the like; the coal uniformizing assembly 5 includes a pulverized coal uniformizing chamber 501, wear-resistant sheets 502, and a partition plate 503; the pulverized coal uniformizing chamber 501 is arranged inside the coal injection pipe 8, the partition plate 503 is arranged inside the pulverized coal uniformizing chamber 501, and the wear-resistant sheets 502 are arranged on the side wall of the partition plate 503; when the pulverized coal flows from the main pulverized coal pipeline 7 into the pulverized coal uniformizing chamber 501, it is first dispersed by the multiple partitioned areas formed by the partition plate 503; due to the effect of the partition plate 503, the pulverized coal is evenly distributed in each area, thereby achieving uniform distribution of the pulverized coal; the wear-resistant sheets 502 covering the partition plate 503 can effectively reduce the wear of the partition plate 503 by the pulverized coal, ensuring that the partition plate 503 can maintain its original shape and function for a long time; through such a design, the pulverized coal has been uniformly distributed and mixed before entering the next stage of processing or combustion, which helps to improve the operating efficiency and stability of the entire system; the coal injection assembly 6 includes pulverized coal nozzles 601; the pulverized coal nozzles 601 are arranged on the side wall of the coal injection pipe 8, and multiple sets of pulverized coal nozzles 601 are arranged on the side wall of the coal injection pipe 8; another pulverized coal nozzle 601 is arranged on the main pulverized coal pipeline 7; the part of the coal injection pipe 8 inserted into the inside of the decomposition furnace is protected by refractory castable; the pulverized coal fed into the decomposition furnace can be uniformly dispersed to the cross section of the decomposition furnace through the coal injection pipe 8, so that it can be uniformly and rapidly mixed with the high-temperature gas in the decomposition furnace; the combustion of the pulverized coal is more uniform and rapid, which can avoid local high temperature in the decomposition furnace, reduce the skin formation in the decomposition furnace, fully utilize the furnace capacity of the decomposition furnace, reduce the content of carbon monoxide at the outlet of the decomposition furnace, and achieve the effect of stable operation, high efficiency, energy saving, and emission reduction;

[0022] When the pulverized coal combustion device is in use, multiple sets of mounting bolts 301 are inserted into the mounting holes 103 in sequence, and then the mounting nuts 302 are assembled and fixed with one end of the mounting bolts 301, so that the connecting flange 202 and the mounting flange 102 can be tightly installed;

[0023] In addition, the connecting assembly 1 realizes reliable connection between the pulverized coal inlet pipe 203 and the main pulverized coal pipeline 7 through the close cooperation of the mounting sleeve 101, the mounting flange 102, the connecting flange 202, and the fastening effect of the mounting bolt 301 and the mounting nut 302, thereby ensuring the smooth conveying of the pulverized coal and the stable operation of the system;

[0024] And, the pulverized coal firstly enters into the inside of the main pulverized coal pipeline 7 through the pulverized coal inlet pipe 203, and then enters into the inside of the uniform distribution pulverized coal chamber 501 through the main pulverized coal pipeline 7. The pulverized coal in the uniform distribution pulverized coal chamber 501 is sprayed into the decomposing furnace by the multiple groups of pulverized coal nozzles 601, multiple tiny pulverized coal spraying points are formed, the pulverized coal is uniformly dispersed in the decomposing furnace and rapidly mixes with the high-temperature gas, so that the pulverized coal is fully combusted;

[0025] In addition, the part of the coal injection pipe 8 inserted into the inside of the decomposing furnace is protected by using the refractory castable. The pulverized coal fed into the decomposing furnace is uniformly dispersed to the cross section of the decomposing furnace through the coal injection pipe 8, so that the pulverized coal can be uniformly and rapidly mixed with the high-temperature gas in the decomposing furnace. The pulverized coal is combusted more uniformly and rapidly, the local high temperature in the decomposing furnace can be avoided, the decomposing furnace skin can be reduced, the decomposing furnace capacity can be fully utilized, the content of carbon monoxide at the outlet of the decomposing furnace can be reduced, and the effects of stable operation, high efficiency, energy saving and emission reduction can be achieved.

[0026] Through the above steps, when the pulverized coal combustion device is in use, the coal feeding assembly 2 can be fastened and installed with the connecting assembly 1 through the installation assembly 3, and the pulverized coal firstly enters into the inside of the main pulverized coal pipeline 7 through the coal feeding assembly 2, and then enters into the inside of the coal uniform distribution assembly 5 through the main pulverized coal pipeline 7, is uniformly distributed to the inside of each coal injection assembly 6 in the coal uniform distribution assembly 5, and is sprayed into the decomposing furnace by the multiple groups of coal injection assemblies 6, multiple tiny pulverized coal spraying points are formed, the pulverized coal is uniformly dispersed in the decomposing furnace and rapidly mixes with the high-temperature gas, so that the pulverized coal is fully combusted.

[0027] The embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge range of the person skilled in the art without departing from the purpose of the utility model.

Claims

1. A diffusion-type pulverized coal combustion device, comprising a main pulverized coal inlet pipe (7), characterized in that: It also includes a pulverized coal injection pipe (8), a connecting component (1), a coal feeding component (2), an installation component (3), a reinforcing component (4), a coal equalization component (5), and a pulverized coal injection component (6); a connecting component (1) is provided at one end of the main pulverized coal feeding pipe (7), a coal feeding component (2) is provided at one end of the connecting component (1), an installation component (3) is provided on the side wall of the coal feeding component (2), a reinforcing component (4) is provided on the side wall of the main pulverized coal feeding pipe (7), a pulverized coal injection pipe (8) is provided at the other end of the main pulverized coal feeding pipe (7), a coal equalization component (5) is provided inside the pulverized coal injection pipe (8), and a pulverized coal injection component (6) is provided on one side of the coal equalization component (5).

2. The diffusion-type pulverized coal combustion device according to claim 1, characterized in that: The connecting assembly (1) includes an installation sleeve (101), an installation flange (102), and an installation hole (103); an installation sleeve (101) is provided at one end of the main pulverized coal inlet pipe (7), an installation flange (102) is provided on one side of the installation sleeve (101), and an installation hole (103) is provided on the side wall of the installation flange (102), and multiple sets of installation holes (103) are provided.

3. The diffusion-type pulverized coal combustion device according to claim 2, characterized in that: The coal feeding assembly (2) includes a support stiffener (201), a connecting flange (202), and a pulverized coal inlet pipe (203). A connecting flange (202) is provided on one side of the mounting flange (102), and a pulverized coal inlet pipe (203) is provided on one side of the connecting flange (202). A support stiffener (201) is provided on the side wall of the pulverized coal inlet pipe (203). Multiple sets of support stiffeners (201) are provided, and another mounting hole (103) is opened on the side wall of the connecting flange (202).

4. A diffusion-type pulverized coal combustion device according to claim 2, characterized in that: The mounting assembly (3) includes a mounting bolt (301) and a mounting nut (302); the mounting hole (103) is provided with a mounting bolt (301), and a mounting nut (302) is provided at one end of the mounting bolt (301), and the mounting nut (302) is threadedly connected to the mounting bolt (301).

5. A diffusion-type pulverized coal combustion device according to claim 1, characterized in that: The reinforcing component (4) includes anchors (401) and fins (402); anchors (401) are provided on the side wall of the main pulverized coal inlet pipe (7), and multiple sets of anchors (401) are provided; fins (402) are provided on the side wall of the main pulverized coal inlet pipe (7), and multiple sets of fins (402) are provided.

6. The diffusion-type pulverized coal combustion device according to claim 1, characterized in that: The coal equalization assembly (5) includes a coal powder equalization chamber (501), wear-resistant plates (502) and a partition plate (503); the coal injection pipe (8) is provided with a coal powder equalization chamber (501), the coal powder equalization chamber (501) is provided with a partition plate (503) inside the coal powder equalization chamber (501), and wear-resistant plates (502) are provided on the side wall of the partition plate (503).

7. A diffusion-type pulverized coal combustion device according to claim 6, characterized in that: The pulverized coal injection assembly (6) includes a pulverized coal nozzle (601); a pulverized coal nozzle (601) is provided on the side wall of the pulverized coal injection pipe (8), and multiple sets of pulverized coal nozzles (601) are provided, with another pulverized coal nozzle (601) provided in the main pulverized coal inlet pipe (7).

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