CN218409914U

CN218409914U - Multipoint-dispersed pulverized coal burner

Info

Publication number: CN218409914U
Application number: CN202222711018.5U
Authority: CN
Inventors: 夏国栋; 罗金富; 郦文静; 丁苏东
Original assignee: Nanjing Juhua Industrial Technology Co ltd
Current assignee: Nanjing Juhua Industrial Technology Co ltd
Priority date: 2022-10-14
Filing date: 2022-10-14
Publication date: 2023-01-31
Anticipated expiration: 2032-10-14

Abstract

The utility model discloses a multipoint dispersed pulverized coal burner, which extends into the furnace body of a decomposing furnace and is provided with a main pulverized coal channel, wherein one end of the main pulverized coal channel of the burner is provided with a pulverized coal inlet, and one end and two sides of the burner, which are far away from the pulverized coal inlet, are provided with a plurality of coal injection nozzles; the burner is provided with a fixed support at the position close to the pulverized coal inlet, the fixed support is fixed on the furnace wall of the decomposing furnace, the burner is connected with the decomposing furnace through the fixed support, and the multiple coal injection nozzles realize multipoint dispersed injection of pulverized coal, so that the pulverized coal is uniformly distributed and combusted, and the defect of single-point concentrated combustion of the traditional single-channel burner is overcome. The pulverized coal is uniformly distributed and combusted, so that local high temperature can be avoided, the emission of nitric oxide and carbon monoxide in flue gas is reduced, and the effects of energy conservation and emission reduction are realized.

Description

Multipoint-dispersed pulverized coal burner

The technical field is as follows:

the utility model relates to a pulverized coal burner of multiple spot dispersion belongs to cement kiln tail combustor field.

Background art:

the kiln tail preheating and predecomposition system in cement industry has the preheating function of raw materials, and the decomposing furnace also completes the decomposition process of the raw materials, and the coal consumption ratio is about 60%.

The traditional kiln tail combustor is a single-channel single-point pulverized coal injection combustor, so that pulverized coal is easily distributed unevenly, the combustion is insufficient, and the condition that the furnace wall is burnt through is caused. In order to make the pulverized coal uniformly distributed as much as possible, a form in which a plurality of burners are uniformly distributed along the circumferential direction of the decomposing furnace is generally adopted. However, the arrangement mode is high in cost and limited by the arrangement of the pulverized coal pipelines, the number of the burners is not too large, the dispersibility of the pulverized coal is still poor, and the combustion is incomplete.

The invention content is as follows:

the utility model provides a pulverized coal burner with multi-point dispersion for solving the problem of single-point coal supply in the prior art.

The utility model discloses the technical scheme who adopts has: a multipoint dispersed pulverized coal burner extends into a furnace body of a decomposing furnace and is provided with a main pulverized coal channel, one end of the main pulverized coal channel of the burner is provided with a pulverized coal inlet, and one end and two sides of the burner, which are far away from the pulverized coal inlet, are provided with a plurality of coal injection nozzles; the combustor is provided with a fixed support at a position close to a pulverized coal inlet, the fixed support is fixed on the furnace wall of the decomposing furnace, and the combustor is connected with the decomposing furnace through the fixed support.

And a plurality of coal injection nozzles at two sides of the combustor are mutually symmetrical and uniformly distributed.

The axial direction of the coal injection nozzles at two sides of the combustor has a certain inclination angle with the horizontal plane and inclines downwards.

The inclination angle between the axial direction of the coal injection nozzles at the two sides of the combustor and the horizontal plane is 10 to 30 degrees.

The end part of the combustor is provided with two coal injection nozzles which are distributed up and down.

And a plurality of reinforcing ribs are arranged on the periphery of the combustor along the axial direction.

And a plurality of anchoring pieces are uniformly distributed on the periphery of the combustor.

And a lining layer is poured on the periphery of the combustor.

The utility model discloses following beneficial effect has:

the utility model discloses a combustor tip and both sides are equipped with a plurality of coal injection mouths, carry out the multiple spot dispersion jetting, on the basis of practicing thrift the cost, have realized the evenly distributed burning of buggy, have avoided the defect that traditional single channel combustor single-point concentrated burning, and local high temperature can be avoided in the buggy evenly distributed burning, and has avoided the adherence burning, has improved the combustion condition, has reduced nitrogen oxide and carbon monoxide emission in the flue gas, realizes energy saving and emission reduction's effect.

Description of the drawings:

fig. 1 is a schematic perspective view of the burner of the present invention;

fig. 2 is a front view of the burner of the present invention;

fig. 3 is a left side view of fig. 2.

In the figure: 1-main coal powder channel, 11-coal powder inlet, 2-coal injection nozzle, 3-fixed support, 4-reinforcing rib, 5-anchoring piece, 6-lining layer and 7-furnace wall.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Examples

As shown in fig. 1, the multipoint dispersed pulverized coal burner of the present embodiment is used in a decomposing furnace, wherein the burner body extends into the center of the furnace body of the decomposing furnace, and a main pulverized coal passage 1 is arranged inside the burner; the combustor is provided with a pulverized coal inlet 11 at one end of a main pulverized coal channel 1, a plurality of coal injection nozzles 2 are arranged at the end part and two sides of the other end of the combustor, and the plurality of coal injection nozzles 2 can realize the dispersed injection of pulverized coal, so that the uniformly distributed combustion of the pulverized coal is realized; the burner is provided with a fixed support 3 at a position close to a pulverized coal inlet 11, the burner is installed on a furnace wall 7 of the decomposing furnace through the fixed support 3, the pulverized coal inlet 11 extends out of the decomposing furnace and is used for being connected with a pulverized coal pipeline, and pulverized coal enters a main pulverized coal channel 1 and then is uniformly sprayed into the decomposing furnace through a plurality of coal spraying nozzles 2.

Example two

The structure of the multi-point pulverized coal burner of this embodiment is substantially the same as that of the first embodiment except that: the burner is characterized in that two rows of coal injection nozzles 2 are respectively arranged on two sides of a main coal powder channel 1 of the burner, the two rows of coal injection nozzles 2 are symmetrically distributed, the coal injection nozzles 2 in each row are uniformly distributed along the axial direction of the main coal powder channel 1, and as shown in a combined graph of fig. 2 and fig. 3, the coal injection nozzles 2 on two sides of the main coal powder channel 1 of the burner are inclined downwards at a certain inclination angle with respect to the horizontal plane, and the inclination angle is 10 to 30 in the embodiment, so that sprayed coal powder is uniformly distributed in a furnace body.

As shown in fig. 3, two coal injection nozzles 2 are arranged at the end of the main pulverized coal passage 1 of the burner, and the two coal injection nozzles 2 are direct injection nozzles.

The casing periphery of combustor is equipped with a plurality of strengthening ribs 4 along the axial in this embodiment, and strengthening rib 4 distributes along the main buggy passageway 1's of combustor axial for strengthen main buggy passageway 1's intensity, the casing periphery of combustor still evenly distributed has a plurality of anchor assembly 5, anchor assembly 5 is the rake nail in this embodiment, and the casing periphery pouring of combustor has lining layer 6, and anchor assembly multiplicable lining layer 6's intensity effectively protects interior passageway.

In this embodiment, the fixing support 3 is a sleeve, and the burner body part extending into the decomposing furnace is detachably inserted into the sleeve, so that the disassembly and the maintenance are convenient.

The technical scheme of the utility model is not limited to above-mentioned each embodiment, and the technical scheme that all adopt to equate substitution mode to obtain all falls the utility model discloses the within range that claims.

Claims

1. The utility model provides a pulverized coal burner of multiple spot dispersion, the combustor stretches into in the furnace body of dore furnace, and is equipped with main buggy passageway, its characterized in that: the combustor is provided with a pulverized coal inlet at one end of the main pulverized coal channel, and a plurality of coal injection nozzles are arranged at one end and two sides of the combustor, which are far away from the pulverized coal inlet; the combustor is provided with a fixed support at a position close to the pulverized coal inlet, the fixed support is fixed on the furnace wall of the decomposing furnace, and the combustor is connected with the decomposing furnace through the fixed support.

2. The multi-point dispersed pulverized coal burner of claim 1, wherein: and a plurality of coal injection nozzles at two sides of the burner are mutually symmetrical and uniformly distributed.

3. The multi-point dispersed pulverized coal burner as set forth in claim 2, wherein: the axial direction of the coal injection nozzles at two sides of the combustor has a certain inclination angle with the horizontal plane and inclines downwards.

4. The multi-point dispersed pulverized coal burner as set forth in claim 3, wherein: the inclination angle between the axial direction of the coal injection nozzles at the two sides of the combustor and the horizontal plane is 10 to 30 degrees.

5. The multi-point dispersed pulverized coal burner as set forth in claim 4, wherein: the end part of the combustor is provided with two coal injection nozzles which are distributed up and down.

6. The multi-point dispersed pulverized coal burner of claim 1, wherein: and a plurality of reinforcing ribs are arranged on the periphery of the combustor along the axial direction.

7. The multi-point dispersed pulverized coal burner of claim 1, wherein: and a plurality of anchoring pieces are uniformly distributed on the periphery of the combustor.

8. The multi-point dispersed pulverized coal burner as set forth in claim 7, wherein: and a lining layer is poured on the periphery of the combustor.