CN210980757U

CN210980757U - Head structure of rotary kiln pulverized coal burner

Info

Publication number: CN210980757U
Application number: CN201921916638.4U
Authority: CN
Inventors: 刘庆平; 何彪; 郄红波; 田硕
Original assignee: Quyang Jinyu Cement Co ltd
Current assignee: Quyang Jinyu Cement Co ltd
Priority date: 2019-11-08
Filing date: 2019-11-08
Publication date: 2020-07-10
Anticipated expiration: 2029-11-08

Abstract

The utility model belongs to the technical field of rotary kiln pulverized coal burner's technique and specifically relates to a rotary kiln pulverized coal burner head structure is related to, including well core plate, well core plate outer interval in proper order has set up first crown plate, second crown plate, third crown plate, first crown plate, second crown plate and third crown plate all are the tube-shape board coaxial with well core plate, the clearance between well core plate and the first crown plate forms central wind chamber, clearance between second crown plate and the third crown plate forms the coal chamber, fixedly connected with end plate on the first crown plate, the end plate extends to the second crown plate, the whirl wind hole has been seted up on the end plate, axial flow wind hole has been seted up on the third crown plate, well core plate cavity sets up to the oil pocket. The utility model discloses have the even effect of air inlet.

Description

Head structure of rotary kiln pulverized coal burner

Technical Field

The utility model belongs to the technical field of rotary kiln pulverized coal burner's technique and specifically relates to a rotary kiln pulverized coal burner head structure is related to.

Background

The rotary kiln is commonly called as rotary calcining kiln, belonging to the field of building material equipment. The rotary kiln is composed of gas flow, fuel combustion, heat transfer and material movement. The rotary kiln fully burns fuel and fully and effectively transfers the heat of burning to the material, so that the material generates a series of physical and chemical changes after receiving the heat, and finally forms finished clinker.

A pulverized coal burner refers to a device which can make pulverized coal fully burn in a short time and generate high-temperature eddy current. Depending on the application, pulverized coal burners can be divided into: the special pulverized coal burner for the rotary kiln, the special pulverized coal burner for the boiler and the special pulverized coal burner for the asphalt mixing station. The pulverized coal burner has a multi-stage multi-nozzle air supply guide structure, can generate high-temperature vortex for pulverized coal in a short time, has the advantages of high complete combustion heat utilization rate, smoke prevention and dust removal, high efficiency, energy conservation, improvement on working conditions, reduction of labor intensity and the like, and is an ideal energy-saving and environment-friendly product.

The design wind eye narrow of current pulverized coal burner head structure makes wind speed low in the wind channel, and flame kinetic energy is not enough, leads to the buggy to fly away along with the wind current, and the burning is not enough.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a rotary kiln pulverized coal burner head structure has the even effect of air inlet.

The above technical purpose of the present invention can be achieved by the following technical solutions:

the utility model provides a rotary kiln pulverized coal burner head structure, includes well core plate, well core plate is outer to be provided with first crown plate, second crown plate, third crown plate in proper order the interval, first crown plate, second crown plate and third crown plate all are the tube-shape board coaxial with well core plate, the clearance between well core plate and the first crown plate forms central wind chamber, clearance between second crown plate and the third crown plate forms the coal chamber, fixedly connected with end plate on the first crown plate, the end plate extends to second crown plate, the whirl wind hole has been seted up on the end plate, axial flow wind hole has been seted up on the third crown plate, well core plate cavity sets up to the oil pocket.

By adopting the technical scheme, the oil cavity, the central air cavity, the rotational flow air holes, the coal cavity and the axial flow air holes are sequentially arranged from inside to outside, and the rotational flow air holes and the axial flow air holes are arranged on two sides of the coal cavity, so that the rotational flow air and the axial flow air are not interfered with each other and the flame shape of pulverized coal combustion is adjusted through matching.

The utility model discloses further set up to: the inner diameter of the end plate is consistent with that of the first ring plate, and the outer diameter of the end plate is consistent with that of the second ring plate.

By adopting the technical scheme, the two ends of the end plate are respectively connected with the first annular plate and the second annular plate, so that the end plate covers the gap between the first annular plate and the second annular plate, the position and the shape of the rotational flow air hole are more accurate, and the air quantity is more conveniently controlled.

The utility model discloses further set up to: the cyclone air holes are located at one end, close to the second annular plate, of the end plate, and a plurality of cyclone air holes are uniformly distributed along the circumferential direction of the end plate.

By adopting the technical scheme, the cyclone air holes are far away from the central air cavity and are close to the coal cavity, cyclone air can act on coal powder in the coal cavity more favorably, the cyclone air is uniformly distributed in the circumferential direction of the coal cavity, and wind power and wind speed are more uniform to act on the coal powder in the coal cavity.

The utility model discloses further set up to: the end face of the rotational flow air hole is rectangular.

By adopting the technical scheme, the rectangular holes are convenient for controlling the rotational flow wind speed and the wind quantity, and the problems that the flame generated by the pulverized coal does not reach the standard and the pulverized coal is not sufficiently combusted due to the fact that the rotational flow wind quantity and the wind speed are too large are avoided.

The utility model discloses further set up to: the axial flow air holes are uniformly distributed along the circumferential direction of the third annular plate.

By adopting the technical scheme, the plurality of mutually independent axial flow air holes enable axial flow air to be uniformly distributed in the peripheral circumference of the coal cavity, and the axial flow air holes can better act on pulverized coal to enable the pulverized coal to be fully combusted.

The utility model discloses further set up to: the end face of the axial flow air hole is circular.

By adopting the technical scheme, the circular hole ensures the air inlet amount and the air speed of the axial flow air hole, so that the circular hole is matched with the rotational flow air to adjust the shape of the pulverized coal combustion flame, and the pulverized coal is fully combusted.

The utility model discloses further set up to: an outer ring plate is sleeved outside the third ring plate, and one end of the outer ring plate, close to the third ring plate, is provided with a cooling air hole.

Through adopting above-mentioned technical scheme, the cooling air hole provides the cooling air passageway, retrieves the heat after the buggy burning, avoids the heat waste.

The utility model discloses further set up to: the cooling air holes are uniformly distributed along the circumferential direction of the outer ring plate.

Through adopting above-mentioned technical scheme, cooling air hole evenly distributed makes the cooling air evenly carry out recycle to remaining heat through the cooling air hole, carries out heat recovery as far as, reduces the heat and runs off.

The utility model discloses further set up to: the end face of the cooling air hole is in an arc shape with less than a semicircle.

Through adopting above-mentioned technical scheme, curved wind hole terminal surface increases cooling air and inside area of contact, better carries out heat recovery.

To sum up, the utility model discloses a beneficial technological effect does:

axial flow air holes and rotational flow air holes are respectively formed in two sides of the coal cavity, so that the axial flow air and the rotational flow air are not interfered with each other and act on the pulverized coal in a matched mode, the shape of flame for pulverized coal combustion meets the requirement, and the pulverized coal combustion is more thorough;

a cooling air hole is additionally arranged to provide a cooling air circulation channel, so that the cooling air can recover the residual heat generated by combustion, and the heat loss is reduced;

the rotational flow air holes are set to be rectangular, the axial flow air holes are set to be circular, so that the axial flow air and the rotational flow air can be conveniently and independently adjusted, and the axial flow air and the rotational flow air can be better matched to act on the pulverized coal.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic cross-sectional axial view of the present invention.

In the figure, 1, an oil chamber; 2. a central air cavity; 3. a rotational flow air hole; 4. a coal cavity; 5. an axial flow air hole; 6. cooling air holes; 7. a center plate; 8. a first ring plate; 9. a second ring plate; 10. an end plate; 11. a third ring plate; 12. an outer ring plate.

Detailed Description

Referring to fig. 1, the head structure of the rotary kiln pulverized coal burner disclosed by the present invention comprises a central plate 7, wherein the central plate 7 is a cylindrical plate. A first ring plate 8, a second ring plate 9 and a third ring plate 11 are sequentially arranged outside the central plate 7 at intervals, and the first ring plate 8, the second ring plate 9 and the third ring plate 11 are all cylindrical plates coaxial with the central plate 7. Be connected with end plate 10 on the first crown plate 8, end plate 10 is the annular and extends to second crown plate 9, and end plate 10 carries out fixed connection through the bolt respectively with first crown plate 8 and second crown plate 9. The inner diameter of the end plate 10 corresponds to the inner diameter of the first ring plate 8, and the outer diameter of the end plate 10 corresponds to the inner diameter of the second ring plate 9. An outer ring plate 12 is arranged outside the third ring plate 11, and the outer ring plate 12 is a cylindrical plate coaxial with the central plate 7 and is fixedly sleeved and connected with the third ring plate 11 in a gapless manner.

Referring to fig. 1 and 2, the hollow interior of the central plate 7 is provided as an oil chamber 1 for adding and containing oil for use. The gap between the central plate 7 and the first ring plate 8 is provided as a central air chamber 2 for central air circulation. The end plate 10 is provided with a rotational flow air hole 3 for rotational flow air circulation. The gap between the second ring plate 9 and the third ring plate 11 forms a coal cavity 4 for adding and containing pulverized coal. The third annular plate 11 is provided with an axial flow air hole 5 for the circulation of axial flow air. The outer ring plate 12 is provided with cooling air holes 6 for cooling air circulation.

Referring to fig. 1 and 2, the central wind chamber 2 is arranged in an overall ring shape, so that the central wind flow forms a complete ring distribution. The cyclone air holes 3 are rectangular holes which are positioned at one end of the end plate 10 close to the second annular plate 9, a plurality of cyclone air holes 3 are uniformly distributed along the circumferential direction of the end plate 10, the rectangular air ports are convenient for controlling the air inlet volume of cyclone air, and the cyclone air is uniformly distributed to ensure that the air inlet of the cyclone air is uniform. The axial flow air holes 5 are a plurality of circular holes uniformly distributed along the circumferential direction of the third annular plate 11, and the circular axial flow air holes 5 ensure the air inlet volume and the air speed of axial flow air. The axial flow air holes 5 and the rotational flow air holes 3 are respectively arranged at two sides of the coal cavity 4, so that the axial flow air and the rotational flow air are not interfered with each other, and the axial flow air and the rotational flow air can more fully act on the coal powder in the coal cavity 4, so that the coal powder can be more fully combusted.

Referring to fig. 1 and 2, a plurality of cooling air holes 6 are uniformly distributed along the circumferential direction of the outer ring plate 12, and the end faces of the cooling air holes 6 are in an arc shape with less semi-circles. The arrangement of the outer ring plate 12 not only protects the internal mechanism, but also provides the cooling air holes 6, thereby being more convenient for recovering the heat generated by burning the pulverized coal.

The implementation principle of the embodiment is as follows: the central plate 7, the first ring plate 8, the second ring plate 9, the third ring plate 11 and the outer ring plate 12 are sequentially arranged from inside to outside, an oil cavity 1, a central air cavity 2, a cyclone air hole 3, a coal cavity 4, an axial flow air hole 5 and a cooling air hole 6 which are sequentially arranged from inside to outside are formed by matching with an end plate 10, and pulverized coal in the coal cavity 4 is sprayed out under the action of cyclone air and axial flow air and is in contact combustion with hot air in an air duct, so that heat generated by combustion is transferred to raw materials, the cooling air is used for heat recovery, and heat loss is reduced.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The head structure of the rotary kiln pulverized coal burner comprises a central plate (7), wherein a first annular plate (8), a second annular plate (9) and a third annular plate (11) are sequentially arranged outside the central plate (7) at intervals, the first annular plate (8), the second annular plate (9) and the third annular plate (11) are all cylindrical plates coaxial with the central plate (7), and the rotary kiln pulverized coal burner is characterized in that: the utility model discloses a coal stove, including well core plate (7) and first crown plate (8), clearance between second crown plate (9) and third crown plate (11) forms coal chamber (4), fixedly connected with end plate (10) on first crown plate (8), end plate (10) extend to second crown plate (9), whirl wind hole (3) have been seted up on end plate (10), axial flow wind hole (5) have been seted up on third crown plate (11), well core plate (7) cavity sets up to oil pocket (1).

2. The head structure of the pulverized coal burner of the rotary kiln as claimed in claim 1, wherein: the inner diameter of the end plate (10) is consistent with that of the first ring plate (8), and the outer diameter of the end plate (10) is consistent with that of the second ring plate (9).

3. The head structure of the pulverized coal burner of the rotary kiln as claimed in claim 1, wherein: the cyclone air holes (3) are located at one end, close to the second annular plate (9), of the end plate (10), and a plurality of cyclone air holes (3) are uniformly distributed along the circumferential direction of the end plate (10).

4. The head structure of the pulverized coal burner of the rotary kiln as claimed in claim 1, wherein: the end face of the rotational flow air hole (3) is rectangular.

5. The head structure of the pulverized coal burner of the rotary kiln as claimed in claim 1, wherein: the axial flow air holes (5) are uniformly distributed along the circumferential direction of the third annular plate (11).

6. The head structure of the pulverized coal burner of the rotary kiln as claimed in claim 1, wherein: the end face of the axial flow air hole (5) is circular.

7. The head structure of the pulverized coal burner of the rotary kiln as claimed in claim 1, wherein: an outer ring plate (12) is sleeved outside the third ring plate (11), and one end, close to the third ring plate (11), of the outer ring plate (12) is provided with a cooling air hole (6).

8. The head structure of the pulverized coal burner of the rotary kiln as claimed in claim 7, wherein: the cooling air holes (6) are uniformly distributed along the circumferential direction of the outer ring plate (12).

9. The head structure of the rotary kiln pulverized coal burner as claimed in claim 8, wherein: the end face of the cooling air hole (6) is in an arc shape with less than a semicircle.