Chain grate furnace with air inlet heating function

Abstract

The utility model discloses a chain grate furnace with an air inlet heating function, which relates to the technical field of chain grate furnaces and comprises a furnace body and a chain grate arranged in a combustion cavity, an ash cavity is arranged on one side of a discharge end of the chain grate in the furnace body, and an upper air cavity and a lower air cavity are respectively arranged on the furnace body on the upper side and the lower side of the ash cavity. A plurality of hollow heat exchange plates are fixedly arranged in the ash cavity, a gap allowing ash to flow is reserved between every two adjacent hollow heat exchange plates, the upper ends and the lower ends of the hollow heat exchange plates are communicated with the upper air cavity and the lower air cavity, a fan is fixedly arranged on the furnace body, the air inlet end of the fan is communicated with the upper air cavity, and the air outlet end of the fan is communicated with the lower air cavity. According to the boiler, waste heat in ash can be used for heating air entering the boiler body, meanwhile, the air entering the boiler body can be heated while the chain grate is cooled, and therefore the situation that the temperature in the boiler is reduced due to the fact that cold air enters the boiler body is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of chain furnaces, in particular to a chain furnace with an air intake heating function. Background Art

[0002] The chain grate furnace is a moving layer combustion furnace. Its working method is that after the coal falls from one end of the grate onto the grate surface and enters the furnace, it gradually moves slowly from front to back along with the grate. The air required for combustion passes through the gap of the grate from bottom to top and intersects vertically with the moving coal layer. The ignition of coal mainly depends on the flame of the furnace and the radiation heat of the arch. Therefore, the upper coal ignites first and then gradually burns downwards. It is a single-sided ignition method.

[0003] For example, in the utility model patent with the announcement number CN214619496U, a chain furnace is disclosed, including a boiler body, a feed box is installed on one side of the boiler body, and a feed port is opened at the top of the feed box, an adjusting wheel is arranged inside the feed box, and a discharge port is arranged on one side of the feed box inside the boiler body, a temperature sensor is installed on the inner wall of the boiler body, and a cooling box is arranged inside the boiler body, a cooling nozzle is arranged on the top of the cooling box, and a roller is installed inside the boiler body above the cooling box;

[0004] However, in the utility model, the air required for combustion is discharged into the furnace body without being heated. The entry of cold air will lower the temperature in the furnace, resulting in heat loss, and the use effect is not good. Utility Model Content

[0005] In view of the deficiencies of the prior art, the utility model provides a chain furnace with an air intake heating function, which solves the technical problem that the prior device cannot utilize the waste heat of ash to heat the required air and then discharge it into the furnace body, thereby causing the temperature in the furnace to drop.

[0006] To achieve the above objectives, the utility model is implemented through the following technical solutions: a chain furnace with air intake heating function, comprising a furnace body and a chain grate arranged in a combustion chamber, an ash chamber is arranged in the furnace body on one side of the discharge end of the chain grate, an upper air chamber and a lower air chamber are respectively arranged on the furnace body at the upper and lower sides of the ash chamber, a plurality of hollow heat exchange plates are fixedly arranged in the ash chamber, a gap for ash flow is left between two adjacent hollow heat exchange plates, the upper and lower ends of the plurality of hollow heat exchange plates are connected with the upper air chamber and the lower air chamber, a fan is fixedly arranged on the furnace body, the air inlet end of the fan is connected with the upper air chamber, the air outlet end of the fan is connected to the lower side of the load-bearing side of the chain grate through an air supply pipe, and a feed hopper is arranged on the furnace body above the chain grate.

[0007] Preferably, a cooling box is fixedly installed in the furnace body, and openings are provided at both ends of the cooling box. The return side of the chain grate is placed in the cooling box through the openings. One end of the cooling box is located below the return side of the chain grate and is connected to the lower air cavity, and the other end of the cooling box is located above the return side of the chain grate and is provided with an air inlet.

[0008] Preferably, an air blowing groove is fixedly provided above the cooling box, the upper end opening of the air blowing groove is placed below the load-bearing side of the chain grate, and the air supply pipe is connected to the air blowing groove.

[0009] Preferably, a slag discharge port is provided on one side of the bottom of the ash chamber.

[0010] Preferably, one end of the hollow heat exchange plate close to the chain grate is a pointed structure.

[0011] Beneficial Effects

[0012] The utility model provides a chain furnace with an air intake heating function, which has the following beneficial effects: by starting the fan, external cold air can enter the cooling box through the air inlet, cool the return side of the chain grate, and prevent the chain grate from being shortened due to overheating; the air in the cooling box enters a plurality of hollow heat exchange plates through the lower air cavity under the pumping of the fan, and the air in the hollow heat exchange plates is heated by the residual heat remaining in the ash, and the heated air is discharged to the bottom of the chain grate through the air supply pipe for combustion. The device can utilize the residual heat in the ash to heat the air entering the furnace body, and can also heat the air entering the furnace body while cooling the chain grate, thereby preventing the temperature in the furnace from decreasing due to the entry of cold air into the furnace body. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is the main internal structure diagram of the utility model;

[0014] Figure 2 for Figure 1 Sectional view of AA.

[0015] In the figure: 1. furnace body; 2. combustion chamber; 3. chain grate; 4. ash chamber; 5. cooling box; 6. lower air chamber; 7. upper air chamber; 8. hollow heat exchange plate; 9. air inlet; 10. air blowing slot; 11. fan; 12. air supply pipe; 13. slag discharge port; 14. opening; 15. feed hopper. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0017] See also Figure 1-2The utility model provides a technical solution: a chain furnace with air intake heating function, comprising a furnace body 1 and a chain grate 3 arranged in a combustion chamber 2, a slag chamber 4 is arranged at one side of the discharge end of the chain grate 3 in the furnace body 1, and the slag discharged by the chain grate 3 will enter the slag chamber 4, and an upper air chamber 7 and a lower air chamber 6 are respectively arranged on the furnace body 1 at the upper and lower sides of the slag chamber 4, and a plurality of hollow heat exchange plates 8 are fixedly arranged in the slag chamber 4, and a gap for the slag to flow is left between two adjacent hollow heat exchange plates 8, and a plurality of hollow heat exchange plates 8 are provided. The upper and lower ends are connected with the upper air cavity 7 and the lower air cavity 6. The air can enter into several hollow heat exchange plates 8 through the lower air cavity 6. The air is heated by the residual heat remaining in the ash on the outside of the hollow heat exchange plates 8. A fan 11 is fixedly arranged on the furnace body 1. The air inlet end of the fan 11 is connected with the upper air cavity 7. The air outlet end of the fan 11 is connected to the lower side of the load-bearing side of the chain grate 3 through the air supply pipe 12. The heated air can be transported to the lower side of the chain grate 3 through the fan 11. A feed hopper 15 is arranged on the furnace body 1 above the chain grate 3.

[0018] As an embodiment of the utility model, a cooling box 5 is fixedly arranged in the furnace body 1, and openings 14 are provided at both ends of the cooling box 5. The return side of the chain grate 3 is placed in the cooling box 5 through the opening 14, and one end of the cooling box 5 is located below the return side of the chain grate and is connected with the lower air cavity 6, and the other end of the cooling box 5 is located above the return side of the chain grate and is provided with an air inlet 9. When the fan 11 is started, external cold air can enter the cooling box 5 through the air inlet 9 to cool the chain grate 3 in the cooling box 5. At the same time, the air can also be heated through the chain grate 3, so that the air is preliminarily heated and then enters the hollow heat exchange plate 8 for heating.

[0019] As an embodiment of the utility model, an air blowing groove 10 is fixedly arranged above the cooling box 5, and the upper end opening 14 of the air blowing groove 10 is placed below the load-bearing side of the chain grate 3. The air supply pipe 12 is connected to the air blowing groove 10, and the air is provided to a large area of ​​the load-bearing side of the chain grate 3 through the air blowing groove 10.

[0020] As an embodiment of the present invention, a slag discharge port 13 is provided at one side of the bottom of the ash chamber 4 for discharging ash.

[0021] As an embodiment of the present invention, one end of the hollow heat exchange plate 8 close to the chain grate is a pointed structure, which facilitates ash to enter the gap between two adjacent hollow heat exchange plates 8 .

[0022] The working principle and use process of the utility model are as follows: when in use, the fuel enters the chain grate 3 through the feed hopper 15 for combustion, and the ash after combustion will be discharged into the ash cavity 4 and finally discharged through the slag discharge port 13. Starting the fan 11 can allow external cold air to enter the cooling box 5 through the air inlet 9 to cool the return side of the chain grate 3 to prevent the service life of the chain grate 3 from being reduced due to overheating. The air in the cooling box 5 enters a plurality of hollow heat exchange plates 8 through the lower air cavity 6 under the pumping of the fan 11, and the air in the hollow heat exchange plates 8 is heated by the residual heat remaining in the ash. The heated air is discharged to the bottom of the chain grate 3 through the air supply pipe 12 for combustion, thereby preventing the temperature in the furnace from decreasing due to the cold air entering the furnace body 1.

[0023] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A chain grate furnace with an air intake heating function, comprising a furnace body (1) and a chain grate (3) arranged in a combustion chamber (2), characterized in that: An ash chamber (4) is provided in the furnace body (1) at one side of the discharge end of the chain grate (3); an upper air chamber (7) and a lower air chamber (6) are provided on the furnace body (1) at the upper and lower sides of the ash chamber (4), respectively; a plurality of hollow heat exchange plates (8) are fixedly provided in the ash chamber (4); a gap for ash to flow is left between two adjacent hollow heat exchange plates (8); upper and lower ends of the plurality of hollow heat exchange plates (8) are connected to the upper air chamber (7) and the lower air chamber (6); a fan (11) is fixedly provided on the furnace body (1); an air inlet end of the fan (11) is connected to the upper air chamber (7); an air outlet end of the fan (11) is connected to the lower side of the load-bearing side of the chain grate (3) through an air supply pipe (12); and a feed hopper (15) is provided on the furnace body (1) above the chain grate (3).

2. The chain grate furnace with air intake heating function according to claim 1, characterized in that: A cooling box (5) is fixedly arranged in the furnace body (1), and openings (14) are provided at both ends of the cooling box (5). The return side of the chain grate (3) passes through the opening (14) and is placed in the cooling box (5). One end of the cooling box (5) is located below the return side of the chain grate and is connected to the lower air cavity (6), and the other end of the cooling box (5) is located above the return side of the chain grate and is provided with an air inlet (9).

3. The chain grate furnace with air intake heating function according to claim 2, characterized in that: An air blowing groove (10) is fixedly arranged above the cooling box (5), an upper opening (14) of the air blowing groove (10) is placed below the load-bearing side of the chain grate (3), and the air supply pipe (12) is connected to the air blowing groove (10).

4. The chain grate furnace with air intake heating function according to claim 1, characterized in that: A slag discharge port (13) is provided at one side of the bottom of the ash chamber (4).

5. The chain grate furnace with air intake heating function according to claim 1, characterized in that: One end of the hollow heat exchange plate (8) close to the chain grate is a pointed structure.

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