Ignition combustion device of circulating fluidized bed boiler

Abstract

The utility model discloses an ignition combustion device of a circulating fluidized bed boiler, which relates to the technical field of circulating fluidized beds and comprises a kiln, an ignition chamber is arranged at the bottom end of the kiln, an ignition gun for igniting coal is arranged in an inner cavity of the ignition chamber, and a sealing plate for sealing the ignition chamber is arranged at the end of the ignition chamber. The transmission mechanism is arranged on the ignition chamber and the ignition gun and used for providing transmission for limiting and separating of the ignition gun. Through the arrangement of the transmission mechanism, when the ignition gun which finishes ignition needs to be moved out, the ignition gun can be rotated, so that the sealing plate is not limited by the upper abutting rod any more and is partially lifted upwards under the thrust of the lower abutting rod any more, and space is conveniently provided for upward movement of the sealing plate when the ignition gun is pulled out; and the burning torch can be conveniently and rapidly separated and extracted, scalding caused by manual contact with the sealing plate is avoided, and the safety and the working efficiency are further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of circulating fluidized beds, in particular to an ignition and combustion device for a circulating fluidized bed boiler. Background Art

[0002] The circulating fluidized bed boiler uses the most industrialized clean coal combustion technology. The circulating fluidized bed boiler uses fluidized combustion, and its main structure includes two parts: the combustion chamber (including the dense phase zone and the dilute phase zone) and the circulating furnace (including the high-temperature gas-solid separator and the return system).

[0003] A combustion chamber for igniting the kiln is arranged at the bottom of the circulating fluidized bed boiler, the bed material is blown up by a hood, and then an ignition device is used to ignite the bed material in the kiln to make the bed material boil, thereby completing the operation of igniting the boiler, and then the ignition device needs to be manually removed. In order to facilitate the release of the limit on the ignition device and to facilitate the rapid removal of the ignition device, the utility model proposes an ignition and combustion device for a circulating fluidized bed boiler. Utility Model Content

[0004] The purpose of the utility model is to provide an ignition and combustion device for a circulating fluidized bed boiler in order to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a circulating fluidized bed boiler ignition and combustion device, comprising a furnace, an ignition chamber is arranged at the bottom end of the furnace, an ignition gun for igniting coal is arranged in the inner cavity of the ignition chamber, a sealing plate for sealing the ignition chamber is arranged at the end of the ignition chamber, and a transmission mechanism is arranged on the ignition chamber and the ignition gun, and the transmission mechanism is used to provide transmission for the limiting and separation of the ignition gun;

[0006] The transmission mechanism includes a transmission unit and a limit unit;

[0007] The limiting unit is used to limit the butt connection between the sealing plate and the ignition gun;

[0008] The transmission unit is used to provide transmission for the separation of the ignition gun and the sealing plate.

[0009] As a further solution of the utility model: the limiting unit includes a rotating rod, an upper support rod, a lower support rod, and a guide rod;

[0010] The rotating rod is rotatably mounted on the ignition chamber and penetrates the ignition chamber to the inside of the ignition chamber, and the rotating rod is used to synchronously drive the upper push rod and the lower push rod to rotate;

[0011] The guide rod is fixed on the top of the sealing plate and passes through the ignition chamber to the inside of the ignition chamber, and the guide rod is used to drive the sealing plate to move synchronously;

[0012] The upper push rod is fixed to the outer wall of the rotating rod and is located above the guide rod, and the upper push rod is used to limit the upward movement of the guide rod;

[0013] The lower push rod is fixed on the outer wall of the rotating rod and is located inside the ignition chamber. The lower push rod is used to provide thrust for the upward movement of the guide rod.

[0014] As a further solution of the utility model: the transmission unit includes a first bevel gear, a second bevel gear, a spur gear, and a gear ring;

[0015] The first bevel gear is fixed to the bottom end of the rotating rod, and the first bevel gear is used to drive the second bevel gear to rotate;

[0016] The second bevel gear is fixed to one end of the spur gear, and the second bevel gear is used to synchronously drive the spur gear to rotate;

[0017] The spur gear is rotatably mounted inside the ignition chamber, and the spur gear is used to receive the rotational thrust from the gear ring;

[0018] The gear ring is fixed on the outer wall of the ignition gun, and the gear ring is used to give the spur gear a rotational thrust.

[0019] As a further solution of the present invention: the outer wall of the guide rod is in an "L"-shaped structure as a whole, and the outer wall of the ignition chamber is formed with a hole groove for the end of the guide rod to enter.

[0020] As a further solution of the utility model: the outer walls of the lower push rod and the upper push rod are both inclined, and the inclined surfaces of the upper push rod and the lower push rod are close to each other.

[0021] As a further solution of the utility model: the upper push rod and the lower push rod are distributed on the outer wall of the rotating rod at a 90-degree angle, and the upper push rod and the lower push rod are staggered up and down.

[0022] As a further solution of the utility model: the inner wall of the sealing plate is formed with a docking groove matching the outer wall of the ignition gun, and the inner cavity of the docking groove is formed with a semicircular rotating ring in contact with the outer wall of the ignition gun.

[0023] Compared with the prior art, the beneficial effects of the utility model are:

[0024] By setting up a transmission mechanism, when it is necessary to move out the ignition gun that has completed ignition, the ignition gun can be rotated so that the sealing plate is no longer limited by the upper push rod and the upward lifting part is no longer subject to the thrust of the lower push rod. This provides space for the sealing plate to move upward when the ignition gun is drawn out, facilitates the rapid separation and withdrawal of the ignition gun, avoids burns caused by manual contact with the sealing plate, and further improves safety and work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the utility model;

[0026] Figure 2 This is a cross-sectional view of the internal structure of the ignition chamber of the utility model;

[0027] Figure 3 It is a partial enlarged view of point A of the present utility model.

[0028] In the figure: 1. furnace; 2. ignition chamber; 3. ignition gun; 4. sealing plate; 5. transmission mechanism; 501. rotating rod; 502. upper push rod; 503. lower push rod; 504. first bevel gear; 505. second bevel gear; 506. spur gear; 507. gear ring; 508. guide rod. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] See also Figure 1-Figure 3 In the embodiment of the utility model, a circulating fluidized bed boiler ignition and combustion device comprises a furnace 1, an ignition chamber 2 is arranged at the bottom end of the furnace 1, an ignition gun 3 for igniting coal is arranged in the inner cavity of the ignition chamber 2, a sealing plate 4 for sealing the ignition chamber 2 is arranged at the end of the ignition chamber 2, and a transmission mechanism 5 is arranged on the ignition chamber 2 and the ignition gun 3, and the transmission mechanism 5 is used to provide transmission for the limit and separation of the ignition gun 3;

[0031] The transmission mechanism 5 includes a transmission unit and a limit unit;

[0032] The limiting unit is used to limit the butt joint of the sealing plate 4 and the ignition gun 3;

[0033] The transmission unit is used to provide transmission for the separation of the ignition gun 3 and the sealing plate 4;

[0034] The limiting unit includes a rotating rod 501, an upper support rod 502, a lower support rod 503, and a guide rod 508;

[0035] The rotating rod 501 is rotatably mounted on the ignition chamber 2 and penetrates the ignition chamber 2 to the inside of the ignition chamber 2. The rotating rod 501 is used to synchronously drive the upper supporting rod 502 and the lower supporting rod 503 to rotate;

[0036] The guide rod 508 is fixed to the top of the sealing plate 4 and passes through the ignition chamber 2 to the inside of the ignition chamber 2. The guide rod 508 is used to drive the sealing plate 4 to move synchronously;

[0037] The upper push rod 502 is fixed to the outer wall of the rotating rod 501 and is located above the guide rod 508. The upper push rod 502 is used to limit the upward movement of the guide rod 508.

[0038] The lower push rod 503 is fixed to the outer wall of the rotating rod 501 and is located inside the ignition chamber 2. The lower push rod 503 is used to provide thrust for the upward movement of the guide rod 508;

[0039] The transmission unit includes a first bevel gear 504, a second bevel gear 505, a spur gear 506, and a gear ring 507;

[0040] The first bevel gear 504 is fixed to the bottom end of the rotating rod 501, and the first bevel gear 504 is used to drive the second bevel gear 505 to rotate;

[0041] The second bevel gear 505 is fixed to one end of the spur gear 506, and the second bevel gear 505 is used to synchronously drive the spur gear 506 to rotate;

[0042] The spur gear 506 is rotatably mounted inside the ignition chamber 2, and the spur gear 506 is used to receive the rotation thrust from the gear ring 507;

[0043] The gear ring 507 is fixed to the outer wall of the ignition gun 3, and the gear ring 507 is used to give the spur gear 506 a rotational thrust;

[0044] The inner wall of the sealing plate 4 is formed with a docking groove matching the outer wall of the ignition gun 3 , and the inner cavity of the docking groove is formed with a semicircular rotating ring in contact with the outer wall of the ignition gun 3 .

[0045] In this embodiment, when the ignition gun 3 that has been ignited needs to be pulled out, the ignition gun 3 can be rotated to rotate about the axis of the docking groove of the sealing plate 4. The rotating ignition gun 3 will synchronously drive the gear ring 507 to rotate. The rotation of the gear ring 507 will give a rotation thrust to the spur gear 506 meshing with its outer wall. The spur gear 506 will be rotated under the force, thereby synchronously driving the second bevel gear 505 to rotate. The rotating second bevel gear 505 will give a rotation thrust to the first bevel gear 504, thereby synchronously driving the rotating rod 501 to rotate. The lower push rod 503 and the upper push rod 502 on the outer wall of the rotating rod 501 will also rotate with the rotation of the rotating rod 501. At this time The upper push rod 502 will first move out from above the guide rod 508 and will no longer limit the guide rod 508. The continuous rotation of the lower push rod 503 will contact the protrusion at the lower end of the guide rod 508. The inclined surface of the lower push rod 503 gives the guide rod 508 an upward thrust, thereby driving the guide rod 508 and the sealing plate 4 to move upward, so that the sealing plate 4 is separated from the outer wall portion of the ignition gun 3, so that in the process of withdrawing the ignition gun 3, the end firing port of the ignition gun 3 contacts this gap, giving the sealing plate 4 an upward thrust, thereby completing the removal of the ignition gun 3, and manual labor does not directly contact the sealing plate 4, thus avoiding burns and further improving work efficiency.

[0046] Please refer to Figure 1-Figure 3 The outer wall of the guide rod 508 is an "L"-shaped structure as a whole. The outer wall of the ignition chamber 2 is formed with a hole groove for the end of the guide rod 508 to enter. The outer walls of the lower push rod 503 and the upper push rod 502 are both inclined, and the inclined surfaces of the upper push rod 502 and the lower push rod 503 are close to each other. The upper push rod 502 and the lower push rod 503 are distributed at ninety degrees on the outer wall of the rotating rod 501, and the upper push rod 502 and the lower push rod 503 are staggered up and down.

[0047] In this embodiment: through this structure, after the ignition gun 3 is inserted into the ignition chamber 2, the gear ring 507 can be connected and meshed with the outer wall of the spur gear 506. By rotating the ignition gun 3, the rotating ignition gun 3 will synchronously drive the rotating rod 501 to rotate, so that the upper support rod 502 on the outer wall of the rotating rod 501 rotates synchronously, so that the outer wall of the upper support rod 502 contacts the top of the guide rod 508, limiting the movement of the guide rod 508, and simultaneously giving the guide rod 508 and the sealing plate 4 a downward extrusion force to limit the ignition gun 3.

[0048] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A circulating fluidized bed boiler ignition and combustion device, comprising a furnace (1), wherein an ignition chamber (2) is arranged at the bottom end of the furnace (1), an ignition gun (3) for igniting coal is arranged in the inner cavity of the ignition chamber (2), and a sealing plate (4) for sealing the ignition chamber (2) is arranged at the end of the ignition chamber (2), wherein: A transmission mechanism (5) is arranged on the ignition chamber (2) and the ignition gun (3), and the transmission mechanism (5) is used to provide transmission for limiting and separating the ignition gun (3); The transmission mechanism (5) comprises a transmission unit and a limiting unit; The limiting unit is used to provide limiting for the butt connection between the sealing plate (4) and the ignition gun (3); The transmission unit is used to provide transmission for the separation of the ignition gun (3) and the sealing plate (4).

2. The circulating fluidized bed boiler ignition combustion device according to claim 1, characterized in that: The limiting unit comprises a rotating rod (501), an upper supporting rod (502), a lower supporting rod (503), and a guide rod (508); The rotating rod (501) is rotatably mounted on the ignition chamber (2) and penetrates the ignition chamber (2) to the inside of the ignition chamber (2), and the rotating rod (501) is used to synchronously drive the upper supporting rod (502) and the lower supporting rod (503) to rotate; The guide rod (508) is fixed to the top of the sealing plate (4) and passes through the ignition chamber (2) to the inside of the ignition chamber (2), and the guide rod (508) is used to drive the sealing plate (4) to move synchronously; The upper push rod (502) is fixed to the outer wall of the rotating rod (501) and is located above the guide rod (508), and the upper push rod (502) is used to limit the upward movement of the guide rod (508); The lower push rod (503) is fixed to the outer wall of the rotating rod (501) and is located inside the ignition chamber (2). The lower push rod (503) is used to provide a thrust for the upward movement of the guide rod (508).

3. The circulating fluidized bed boiler ignition combustion device according to claim 2, characterized in that: The transmission unit comprises a first bevel gear (504), a second bevel gear (505), a spur gear (506), and a gear ring (507); The first bevel gear (504) is fixed to the bottom end of the rotating rod (501), and the first bevel gear (504) is used to drive the second bevel gear (505) to rotate; The second bevel gear (505) is fixed to one end of the spur gear (506), and the second bevel gear (505) is used to synchronously drive the spur gear (506) to rotate; The spur gear (506) is rotatably mounted inside the ignition chamber (2), and the spur gear (506) is used to receive the rotational thrust from the gear ring (507); The gear ring (507) is fixed to the outer wall of the ignition gun (3), and the gear ring (507) is used to give the spur gear (506) a rotational thrust.

4. The circulating fluidized bed boiler ignition combustion device according to claim 2, characterized in that: The outer wall of the guide rod (508) is in an "L"-shaped structure as a whole, and the outer wall of the ignition chamber (2) is formed with a hole groove for the end of the guide rod (508) to enter.

5. The circulating fluidized bed boiler ignition combustion device according to claim 2, characterized in that: The outer walls of the lower support rod (503) and the upper support rod (502) are both in an inclined state, and the inclined surfaces of the upper support rod (502) and the lower support rod (503) are close to each other.

6. The circulating fluidized bed boiler ignition combustion device according to claim 2, characterized in that: The upper support rod (502) and the lower support rod (503) are distributed at a 90-degree angle on the outer wall of the rotating rod (501), and the upper support rod (502) and the lower support rod (503) are distributed alternately up and down.

7. The circulating fluidized bed boiler ignition combustion device according to claim 1, characterized in that: The inner wall of the sealing plate (4) is formed with a docking groove matching the outer wall of the ignition gun (3), and the inner cavity of the docking groove is formed with a semicircular rotating ring in contact with the outer wall of the ignition gun (3).

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