CN217110412U

CN217110412U - Chute of chain grate

Info

Publication number: CN217110412U
Application number: CN202220641868.XU
Authority: CN
Inventors: 杨凌; 万文余; 倪禄
Original assignee: Xinyu Iron and Steel Co Ltd
Current assignee: Xinyu Iron and Steel Co Ltd
Priority date: 2022-03-23
Filing date: 2022-03-23
Publication date: 2022-08-02
Anticipated expiration: 2032-03-23

Abstract

The utility model discloses a grate chute, including the horizontal guide section, slope guide section and the bottom guide section that set gradually, the top surface of bottom guide section is the guide face that contacts with the pelletizing, and the guide face is the inclined plane that the downward sloping extends, the guide face with contained angle between the slope guide section is the obtuse angle. The utility model discloses a grate chute shortens the dwell time of pelletizing in the lower part, and the pelletizing material flows from grate to rotary kiln gliding very smooth and easy, can reduce the piling up of pelletizing, prevents the nodulation and produces.

Description

Chute of chain grate

Technical Field

The utility model belongs to the technical field of the discharge apparatus, concretely relates to chain grate machine chute.

Background

The chute of the chain grate machine is used for connecting the chain grate machine and the rotary kiln, pellets which are static relative to the grate bed on the chain grate machine enter the top of the chute and then continuously roll to the lower area with acceleration under the action of gravity, and the pellets are buffered and then collided by subsequent pellets to enter the rotary kiln. The upper surface of the lower area of the chute is relatively flat, the angle is close to the horizontal, and the pellets can stay for 1-2 seconds to release most kinetic energy and then can continue to advance and fall to the rotary kiln under the collision of subsequent pellets. The resistance of the pellet to advance is greatly increased after the upper surface of the lower area is provided with broken balls, dust or nodules, so that the dust and the broken balls are easily accumulated, and conditions are provided for the generation of the nodules.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a chute of a chain grate machine, aiming at shortening the retention time of pellets in the lower area of the chute and preventing the generation of nodules.

In order to realize the purpose, the utility model discloses the technical scheme who takes does: the chute of the chain grate comprises a horizontal guide section, an inclined guide section and a bottom guide section which are sequentially arranged, wherein the top surface of the bottom guide section is a guide surface which is contacted with the pellets, the guide surface is an inclined plane which is inclined and extended downwards, and the guide surface and an included angle between the inclined guide sections are obtuse angles.

The included angle between the material guiding surface and the horizontal plane is 45 degrees.

The distance between the upper end of the material guiding surface and the horizontal material guiding section is 4.5 meters.

The utility model discloses a grate chute shortens the dwell time of pelletizing in the lower part, and the pelletizing material flows from grate to rotary kiln gliding very smooth and easy, can reduce the piling up of pelletizing, prevents the nodulation and produces.

Drawings

The present specification includes the following figures, which show the contents:

FIG. 1 is a schematic structural view of a chute of a chain grate;

labeled as:

1. a horizontal material guiding section; 2. a material guide section is inclined; 3. a bottom material guiding section; 4. and (7) material guiding surface.

Detailed Description

The following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings, for the purpose of helping those skilled in the art to understand more completely, accurately and deeply the conception and technical solution of the present invention, and to facilitate its implementation.

As shown in fig. 1, the utility model provides a drying grate chute, including the horizontal guide section 1 that sets gradually, slope guide section 2 and bottom guide section 3, the top surface of bottom guide section 3 is guide face 4 that contacts with the pelletizing, and guide face 4 is the inclined plane that the downward sloping extends, and the contained angle between guide face 4 and the slope guide section 2 is the obtuse angle.

Specifically, as shown in fig. 1, the horizontal guiding section 1 is arranged horizontally, the inclined guiding section 2 is arranged obliquely, the upper end of the inclined guiding section 2 is connected with one end of the horizontal guiding section 1, the lower end of the inclined guiding section 2 is connected with one end of the bottom guiding section 3, and an included angle is formed between the length direction of the inclined guiding section 2 and the horizontal plane and is an acute angle. The material guiding surface 4 extends obliquely towards the lower part of the inclined material guiding section 2, and the included angle between the material guiding surface 4 and the horizontal plane is an acute angle. The bottom conducting section 3 is cast from a heat resistant material.

As shown in fig. 1, preferably, the included angle between the material guiding surface 4 and the horizontal plane is 45 degrees, and the vertical distance between the upper end of the material guiding surface 4 and the horizontal material guiding section 1 is 4.5 meters.

The friction coefficient of the pellet is very small when the pellet rolls, so that the speed of the green pellet is reduced as much as possible after the lower structure of the green pellet is improved, and the included angle between the green pellet and the horizontal plane is not too large. According to the analysis, the broken ball volume is doubled when the included angle between the material guide surface 4 and the plane is set to be more than 65 degrees, the material flow is smooth after a small amount of nodules is formed when the included angle is set to be less than 30 degrees (the material flow of the pellets is most stable, the impact on the whole structure is minimum), the final angle is set to be 45 degrees, so that the pellets can still smoothly enter the kiln through the obstruction of the nodules after the bottom material guide section 3 forms the small amount of nodules, the speed of the pellets entering the kiln is reduced as much as possible, and broken balls and dust are reduced. In order to ensure the improvement effect, the rolling condition is simulated on the wood board by using the naturally cooled preheating balls, and the cracking rate is extremely low (less than or equal to 1 percent) when the inclination angle of the material guiding surface 4 is controlled to be about 45 degrees, so that the expected target can be achieved.

After the material sliding mode is improved, the pellet material flow slides down very smoothly from the chain grate to the rotary kiln without obvious retention time, and no material is accumulated at the middle lower part of the chute. Although the speed of the pellets entering the kiln is increased, the fall of the pellets leaving the chute entering the kiln is reduced, the height difference of the upper part is shortened, and the whole pellet crushing amount is reduced. When the pellet material flow slides smoothly, a small amount of pellets with poor drying and preheating performance are easy to wash away after being cracked in the rolling process and are taken away by system air, the stacking is reduced, although the temperature of a centralized deflagration position after pulverized coal is incompletely combusted is higher than 1200 ℃, the rolling speed of the pellets is high, the dust amount is small, and the unfavorable condition that a large amount of static dust in the original structure or broken pellets grow continuously after being melted cannot be caused after a small amount of pulverized coal is melted.

The invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above-described manner. Various insubstantial improvements are made by adopting the method conception and the technical proposal of the utility model; or without improvement, the above conception and technical solution of the present invention can be directly applied to other occasions, all within the protection scope of the present invention.

Claims

1. Chain grate machine chute, including the horizontal guide section that sets gradually, slope guide section and bottom guide section, its characterized in that: the top surface of the bottom material guiding section is a material guiding surface which is in contact with the pellets, the material guiding surface is an inclined plane which is inclined downwards and extends, and an included angle between the material guiding surface and the inclined material guiding section is an obtuse angle.

2. The grate chute of claim 1 wherein: the included angle between the material guiding surface and the horizontal plane is 45 degrees.

3. The grate chute of claim 1 or 2 wherein: the distance between the upper end of the material guiding surface and the horizontal material guiding section is 4.5 meters.