CN104006376B - A kind of barn combustion chamber with inclined double-deck fire grate - Google Patents

Abstract

The invention discloses a combustion chamber of a barn with an inclined double-layer grate, which comprises a furnace wall, a furnace door, a spring, a circular top cover, an upper grate, a movable ash removal door, a lower grate and a grate. Slag plate; the round top cover can make the flue gas swirl, increase the residence time of the flue gas in the furnace, make it burn more fully, improve the combustion efficiency, and reduce the emission of fly ash; the upper grate is inclined , using segmented air supply structure; the slag discharge plate is connected with the upper grate and kept horizontal under the action of the spring force. When the cinder exceeds a certain quality, the cinder plate will tilt downward, and the cinder will slide into the ash chamber. After slag removal The slag discharge plate returns to the horizontal position under the action of the spring force; the gap between the lower grate is relatively close, which can effectively prevent the unburned or incompletely burned fine coal particles from the upper grate from falling directly into the ash chamber, which can make It continues to burn in the lower grate to achieve the purpose of improving coal combustion efficiency and saving resources.

Description

Combustion chamber of a barn with inclined double-layer grate

technical field

The invention relates to the structure of a combustion chamber used in a barn, in particular to a combustion chamber suitable for a tobacco barn.

Background technique

At present, the grate of the combustion chamber of most barns is set horizontally at the bottom of the combustion chamber, and the coal blocks are distributed horizontally in the furnace. The disadvantage is: during the combustion process of the combustion chamber, the fireman needs to frequently add coal to the furnace, hook ash, poke the fire, etc., and most combustion chambers do not have an ash door, which may cause too much cold air entering the furnace. The air excess coefficient exceeds the limit, which reduces the furnace temperature and increases coal consumption. In addition, the height of the furnace is low, and the residence time of the flue gas in the furnace is short. The volatile components (including fine coal particles and combustible gaseous substances) produced during the pyrolysis of the coal block are not fully burned in the furnace and will be released with the smoke. The gas is discharged from the furnace, and the flue gas contains a large amount of unburned volatile matter and unburned fine coal particles, resulting in increased coal consumption and low thermal efficiency of the furnace. At the same time, the furnace grate usually adopts a single layer, and the fine coal particles whose size is smaller than the aperture of the grate fall into the ash chamber before burning or completely unburned, which reduces the utilization rate of coal and causes a waste of resources.

Contents of the invention

In order to solve the above problems, the present invention provides a combustion chamber for a barn with an inclined double-layer fire grate, which has more complete combustion, improved combustion efficiency and reduced labor intensity.

In order to solve the problems of the technologies described above, the present invention adopts the following technical solutions:

A combustion chamber of a barn with an inclined double-layer fire grate, including a furnace wall, a furnace door, a spring, a circular top cover, an upper fire grate, a movable ash removal door, a lower fire grate and a slag discharge plate;

The furnace wall body consists of a furnace lining, an insulation layer and a red brick exterior wall from the inside to the outside; the furnace door is arranged on the upper part of the front wall of the furnace wall body; , the movable ash removal door is installed on the ash removal port and is slidably matched with the chute provided on the front wall in the vertical direction; the circular top cover is arranged on the top of the furnace wall, and the circular top cover Made of refractory material, the circular top cover is evenly distributed with a plurality of fan-shaped flue flow channels radially outward from the center;

The upper grate is embedded in the left and right walls and the front wall of the furnace wall, the upper grate is inclined, and the height of the upper grate near the front wall is higher than the height of the side away from the front wall. The distance between the bars on the side of the row near the front wall is greater than the distance between the bars on the side away from the front wall;

One side of the slag discharge plate is hinged on the back wall of the furnace wall, the spring is arranged under the slag discharge plate, one end of the spring is connected to the back wall of the furnace wall, and the other end of the spring is connected to the The other side of the slag discharge plate is on and supports the slag discharge plate, the slag discharge plate is arranged horizontally, and the other side of the slag discharge plate is close to the side of the upper grate away from the front wall;

The lower grate is embedded in the left and right walls of the furnace wall, the lower grate is arranged horizontally, the height of the lower grate is located at the upper position of the ash removal port, and a plurality of furnace holes are evenly distributed on the lower grate, so that The bottom of the furnace wall body is located below the lower fire grate to form an ash chamber.

Compared with the prior art, a kind of barn combustion chamber with inclined double-layer fire grate of the present invention has the following advantages:

1. The circular top cover has a fan-shaped array structure, which can make the flow and temperature distribution of the outflowing smoke more uniform, and the rising smoke meets the baffle on the circular top cover, turns back and turns downward to make it burn It is more fully and improves the combustion efficiency; at the same time, it also increases the residence time of flue gas in the furnace and reduces the emission of volatile matter and fly ash.

2. The side of the upper grate close to the front wall has the thickest coal seam and the largest ventilation resistance. At this time, a large amount of volatile matter in the coal is decomposed, and a large amount of air is required for the combustion of volatile matter and coke. Therefore, the distance between the grate and the grate on the side of the upper grate near the front wall is greater than the distance between the grate and the grate on the side far from the front wall, and the gap between the grate and the grate is larger , so that sufficient air can be provided to make it burn fully; for the coal seam on the side of the upper grate far away from the front wall is thinner, the gap between the grate is set to be small, which can effectively prevent excessive air from entering the furnace and causing the heat loss of exhaust smoke Increase.

3. It can discharge slag automatically, and the slag discharge plate remains horizontal under the action of the spring force. When the coal slag on the slag discharge plate exceeds a certain quality, the slag plate will tilt downward, and the coal slag will slide down to the ash chamber, and the slag removal plate will be removed after slag removal Return to the horizontal position under the action of spring force.

4. The lower grate is evenly distributed with a plurality of furnace holes with smaller apertures, which can effectively prevent the unburned or incompletely burned fine coal particles from the upper grate from falling directly into the ash chamber, so as to save resources.

5. The movable ash removal door can flexibly adjust the opening size according to the required ventilation volume to ensure the air volume required for combustion and prevent excessive air from entering the furnace, increasing the heat loss of exhaust smoke and reducing the temperature of the combustion chamber.

6. The inclined distribution of the upper grate automatically realizes the process of preheating, drying, ignition, burning, and burnout. It does not require the fireman to add coal, stir the fire, and hook ash frequently, which reduces the labor intensity of the fireman.

Description of drawings

Fig. 1 is a kind of structural representation of the combustion chamber of the barn with inclined type double-deck fire grate;

Fig. 2 is the structural representation of circular top cover;

Fig. 3 is the structural representation of upper grate;

Fig. 4 is a structural schematic diagram of the lower grate.

In the attached drawings: 1—red brick exterior wall; 2—spring; 3—insulation layer; 4—furnace lining; 5—round top cover; 6—furnace door; 7—upper grate; 8—movable ash removal door; 9—lower grate; 10—slag discharge plate; 11—ash chamber; 12—flue flow channel; 13—baffle; 14—fire grate; 15—furnace bar; 16—circular iron plate; hole.

detailed description

As shown in Figure 1, a combustion chamber of a barn with an inclined double-layer grate includes a furnace wall, a furnace door 6, a spring 2, a circular top cover 5, an upper grate 7, and a movable ash removal door. 8. Lower fire grate 9 and slag discharge plate 10. The wall body of the furnace wall is a furnace lining 4, an insulation layer 3 and a red brick outer wall 1 successively from the inside to the outside. The furnace door 6 is arranged on the top of the front wall of the furnace wall, and the lower part of the front wall of the furnace wall is provided with an ash removal port. It can be slidably matched in the direction, and can flexibly move up and down according to the required ventilation to adjust the size of the opening. It can be taken out of the chute when dust and slag removal is required.

The structure of the circular top cover is shown in Figure 2. The circular top cover 5 is arranged on the top of the furnace wall. The circular top cover 5 is made of refractory material. The flue gas flow channel 12 is fan-shaped radially outward. After the rising flue gas encounters the baffle plate 13 on the circular top cover 5, it turns back and turns downward, which increases the residence time of the flue gas in the furnace, makes it burn more fully, improves the combustion efficiency, and reduces Fly ash emission, so that the flue gas out more evenly.

The structure of the upper grate is shown in Figure 3, and the upper grate 7 is embedded in the left and right walls and the front wall of the furnace wall, which has better stability. The upper grate 7 is inclined, the height of the upper grate 7 near the front wall is higher than the height of the side away from the front wall, and the distance between the grate 15 on the side of the front wall and the grate 15 is Greater than the distance between the fire bar 15 and the fire bar 15 on the side away from the front wall.

One side of the slag discharge plate 10 is hinged on the back wall of the furnace wall, the spring 2 is arranged under the slag discharge plate 10, one end of the spring 2 is connected to the back wall of the furnace wall, and the other end of the spring 2 is connected to On the other side of the slag discharge plate 10 and support the slag discharge plate 10, the slag discharge plate 10 is arranged horizontally, and the other side of the slag discharge plate 10 is close to the side of the upper grate 7 away from the front wall.

The structure of the lower grate is shown in Figure 4. The lower grate 10 is embedded in the left and right walls of the furnace wall. The lower grate is made of circular iron plates 16. The lower grate 9 is horizontally arranged. The height is located at the upper position of the ash removal port, and does not affect the slag discharge of the slag discharge plate 10. A plurality of furnace holes 17 are evenly distributed on the lower grate 9 , and ash chamber 11 is formed at the bottom of the furnace wall and below the lower grate 9 .

Coal is fed from the furnace door 6, placed on the inclined upper grate 7, and burnt in sections on the upper grate 7, and gradually slides down to the slag discharge plate 10 under the action of gravity during the combustion process, from the upper grate 7. The unburned or incompletely burned fine coal particles that fall will fall on the lower fire grate 9 to continue burning. The air enters through the movable ash removal door 8 and contacts with the coal on the fire grate 14 to make it burn; The level of the slag discharge plate 10 kept horizontal under the action is corresponding. The ash after coal combustion can automatically (or under manual action) slide onto the slag discharge plate 10, when the coal slag on the slag discharge plate 10 exceeds a certain quality, the slag discharge plate 10 is tilted, and the ash slag slides down to the ash chamber In 11, the ash that lower fire grate 9 produces can be manually removed by movable ash removal door 8, and the flue gas that coal combustion produces, flows out from circular top cover 5.

The upper grate 7 is arranged obliquely, and the lower grate 9 is arranged horizontally. The coal on the upper grate 7 can automatically slide down along the grate under its own gravity to realize the process of preheating, drying, igniting, burning, and burning out, which can reduce the number of times the fireman adds coal, stirs the fire, and hooks ash, and reduces The labor intensity of the fireman. The aperture of the furnace hole 17 on the lower fire grate 9 is less, and can effectively catch the small coal particles that have not yet had time to burn or not completely burnt from the upper fire grate 7 .

Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present invention without limitation. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be carried out Modifications or equivalent replacements without departing from the spirit and scope of the technical solution of the present invention shall be covered by the claims of the present invention.

Claims (1)

1. A combustion chamber of a barn with an inclined double-layer grate, including a furnace wall and a furnace door (6), and the furnace wall is a furnace lining (4) and an insulation layer (3) from the inside to the outside and a red brick exterior wall (1); the furnace door (6) is arranged on the front wall of the furnace wall; it is characterized in that it also includes a spring (2), a circular top cover (5), an upper grate ( 7), removable ash removal door (8), lower grate (9) and slag discharge plate (10); The lower part of the front wall of the furnace wall is provided with an ash removal port, and the movable ash removal door (8) is installed on the ash removal port and is slidably matched with the chute provided on the front wall in the vertical direction; the The circular top cover (5) is arranged on the top of the furnace wall, and the circular top cover (5) is made of refractory material, and a plurality of circular top covers (5) are evenly arranged on the circular top cover (5) and are arranged radially from the center. A fan-shaped flue flow channel (12); The upper grate (7) is embedded in the left and right walls and the front wall of the furnace wall, the upper grate (7) is inclined, and the height of the upper grate (7) near the front wall is higher than that away from the front wall The height of one side, the distance between the fire bar (15) and the fire bar (15) on the side of the upper fire grate (7) close to the front wall is greater than the distance between the fire bar (15) and the fire bar (15) on the side far from the front wall ( 15) the distance between; One side of the slag discharge plate (10) is hinged on the back wall of the furnace wall, the spring (2) is arranged under the slag discharge plate (10), and one end of the spring (2) is connected to the furnace wall On the rear wall of the body, the other end of the spring (2) is connected to the other side of the slag discharge plate (10) and supports the slag discharge plate (10), the slag discharge plate (10) is horizontally arranged, and the slag discharge plate (10) ) is close to the side of the upper grate (7) away from the front wall; The lower grate (9) is embedded in the left and right walls of the furnace wall, the lower grate is made of circular iron plates, the lower grate (9) is set horizontally, and the height of the lower grate (9) is at the The upper position of the mouth, the lower fire grate (9) is evenly arranged with a plurality of furnace holes (17), and the bottom of the furnace wall is located below the lower fire grate (9) to form the ash chamber (11 ).