Flue gas circulation boiler with low-nitrogen burner

Abstract

The utility model discloses a flue gas circulation boiler with a low-nitrogen burner, which relates to the technical field of flue gas circulation boilers and comprises a boiler body and a burner body connected with the boiler body, a mounting frame is fixedly arranged on the outer wall of the burner body, a protective box is fixedly arranged on the mounting frame, and a fixing block is fixedly arranged on the inner wall of the protective box. A fusion box is rotationally arranged in the middle of the fixing block, a conveying pipe is fixedly arranged at the upper end of the protection box, a rotating assembly for driving the fusion box to rotate is arranged in the protection box, and a gas conveying assembly is arranged in the fusion box. Air and circulating flue gas are fed into the fusion box through the gas inlet pipe, the fusion box is driven to rotate on the fixing block in the protection box through the rotating assembly, centrifugal force is generated in the fusion box, and the air and the circulating flue gas are rotationally fused and located in the middle of the fusion box; and the fusion box is arranged to fuse air and smoke entering the combustor, so that the stability of flames is improved, and combustion is more sufficient.

Description

Technical Field

[0001] The utility model relates to the field of flue gas circulation boilers, in particular to a flue gas circulation boiler with a low-nitrogen burner. Background Art

[0002] The low-nitrogen burner flue gas circulation boiler generates heat by burning fuel through the burner and releasing combustion products. The heat generated by the combustion is transferred to the water in the boiler through the boiler wall, causing the water to be heated and generate steam. The heated water gradually turns into steam, and steam is generated and accumulated in the boiler. The steam is transported to the equipment or production line that requires steam through pipes to provide power or heating. After the flue gas is generated in the boiler, it passes through the low-nitrogen burner and the flue gas circulation system. Part of the flue gas is circulated back to the combustion chamber, and the other part of the flue gas is purified by denitrification, desulfurization and other equipment before being discharged.

[0003] Currently, when the boiler flue gas circulates into the burner along with the air, the air and the circulating flue gas cannot be quickly and fully integrated, resulting in unstable flames ejected from the burner, thereby affecting the temperature control of the boiler. Utility Model Content

[0004] The utility model aims to solve the defect in the prior art that the flue gas of the burner and the air cannot be quickly integrated, and proposes a flue gas circulation boiler with a low-nitrogen burner.

[0005] In order to solve the problems existing in the prior art, the utility model adopts the following technical solutions:

[0006] A flue gas circulation boiler with a low-nitrogen burner comprises a boiler body and a burner body connected to the boiler body, a mounting frame is fixedly provided on the outer wall of the burner body, a protective box is fixedly provided on the mounting frame, a fixing block is fixedly provided on the inner wall of the protective box, a fusion box is rotatably provided in the middle of the fixing block, a delivery pipe is fixedly provided at the upper end of the protective box, the lower end of the delivery pipe is rotatably connected to the fusion box, the upper end of the delivery pipe is connected to the burner body, a gas inlet pipe is fixedly provided at the lower end of the mounting frame, the upper end of the gas inlet pipe is rotatably connected to the fusion box, a rotating assembly for driving the fusion box to rotate is provided in the protective box, and a gas delivery assembly is provided in the fusion box.

[0007] Preferably, the rotating assembly comprises a gear ring fixedly connected to the outer wall of the fusion box, a motor is fixedly provided in the protection box, a pinion is fixedly provided at the output end of the motor, and the pinion is meshed with the gear ring.

[0008] Preferably, the gas delivery assembly includes a fixed plate fixedly connected to the inner wall of the fusion box, a fixed frame is slidably provided in the middle of the fixed plate, a connecting frame is fixedly provided on the inner side of the fixed frame, a disc is fixedly provided at the upper end of the middle of the connecting frame, two springs are fixedly provided on the upper surface of the disc, a fixing rod is fixedly provided at the upper end of the two springs, one end of the two fixing rods is fixedly connected to the inner wall of the delivery pipe, a guide rod is fixedly provided on the top of the inner wall of the fusion box, and the lower end of the guide rod is in contact with the inner wall of the annular groove of the fixing frame.

[0009] Preferably, the outer wall of the disc is sleeved with a rubber ring, and the rubber ring fits with the inner wall of the delivery tube.

[0010] Preferably, a conical guide tube is fixedly provided on the inner wall of the fusion box.

[0011] Preferably, a rectangular block is fixedly provided on the outer wall of the fixing frame, the rectangular block is fitted with the inner wall of the fixing plate, and the bottom of the annular groove of the fixing frame is an inclined surface.

[0012] Preferably, two air inlets are provided at the lower end of the gas inlet pipe.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. In the utility model, air and circulating flue gas are sent into the fusion box through the gas inlet pipe, and the fusion box is driven to rotate on the fixed block in the protection box through the rotating assembly. Centrifugal force is generated in the fusion box, so that the air and circulating flue gas rotate and merge and are located in the middle of the fusion box. The fusion box is set to allow the air and flue gas entering the burner to merge, thereby increasing the stability of the flame and making the combustion more complete;

[0015] 2. In the present invention, the rotation of the fusion box will drive the gas delivery assembly to operate, so that the fused gas in the fusion box can be quickly delivered to the burner, making the gas supply more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the protection box of the utility model;

[0019] Figure 3 This is a schematic diagram of the internal structure of the protective box of the utility model;

[0020] Figure 4 This is a schematic diagram of the internal structure of the fusion box of the utility model;

[0021] Figure 5 It is a schematic diagram of the internal structure of the delivery pipe of the utility model.

[0022] Serial numbers in the figure: 1. Boiler body; 11. Burner body; 12. Mounting frame; 13. Protective box; 14. Fixing block; 15. Fusion box; 16. Delivery pipe; 17. Gas inlet pipe; 2. Gear ring; 21. Motor; 22. Pinion; 3. Fixing plate; 31. Fixing frame; 32. Connecting frame; 33. Disc; 34. Spring; 35. Fixing rod; 36. Guide rod; 4. Rectangular block; 5. Rubber ring; 6. Guide pipe. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] Embodiment: This embodiment provides a flue gas circulation boiler with a low nitrogen burner, see Figure 1-5 Specifically, it includes a boiler body 1 and a burner body 11 connected to the boiler body 1, a mounting frame 12 is fixedly provided on the outer wall of the burner body 11, a protection box 13 is fixedly provided on the mounting frame 12, a fixing block 14 is fixedly provided on the inner wall of the protection box 13, a fusion box 15 is rotatably provided in the middle of the fixing block 14, a delivery pipe 16 is fixedly provided on the upper end of the protection box 13, the lower end of the delivery pipe 16 is rotatably connected to the fusion box 15, the upper end of the delivery pipe 16 is connected to the burner body 11, a gas inlet pipe 17 is fixedly provided on the lower end of the mounting frame 12, the upper end of the gas inlet pipe 17 is rotatably connected to the fusion box 15, the lower end of the gas inlet pipe 17 is provided with two air inlets, a rotating component for driving the fusion box 15 to rotate is provided in the protection box 13, and a gas delivery component is provided in the fusion box 15;

[0025] Connect the external air duct to the lower end of the gas inlet pipe 17, and then connect the flue gas circulation pipe to the lower end of the gas inlet pipe 17, and send the air and the circulating flue gas into the fusion box 15 through the gas inlet pipe 17. The fusion box 15 is driven to rotate on the fixed block 14 in the protection box 13 through the rotating assembly. Centrifugal force is generated in the fusion box 15, so that the air and the circulating flue gas rotate and merge and are in the middle position of the fusion box 15. The rotation of the fusion box 15 will drive the gas delivery assembly to operate, and deliver the fused gas from the delivery pipe 16 to the burner body 11, so that the combustion is more complete. The connection between the delivery pipe 16 and the gas inlet pipe 17 and the fusion box 15 is provided with a sealing gasket, so that when the fusion box 15 rotates, the delivery pipe 16 and the gas inlet pipe 17 will not be driven, and it plays a sealing role.

[0026] In the specific implementation process, Figure 3 and Figure 4 As shown, the rotating assembly includes a gear ring 2 fixedly connected to the outer wall of the fusion box 15, a motor 21 is fixedly arranged in the protection box 13, a pinion 22 is fixedly arranged at the output end of the motor 21, and the pinion 22 is meshed with the gear ring 2;

[0027] The motor 21 drives the pinion 22 to rotate, and the pinion 22 drives the fusion box 15 to rotate through the gear ring 2, so that the air in the fusion box 15 is fused with the flue gas.

[0028] In the specific implementation process, Figure 4 and Figure 5 As shown, the gas delivery assembly includes a fixed plate 3 fixedly connected to the inner wall of the fusion box 15, a fixed frame 31 is slidably provided in the middle of the fixed plate 3, a connecting frame 32 is fixedly provided on the inner side of the fixed frame 31, a disc 33 is fixedly provided at the upper end of the middle of the connecting frame 32, two springs 34 are fixedly provided on the upper surface of the disc 33, and a fixing rod 35 is fixedly provided at the upper end of the two springs 34, and one end of the two fixing rods 35 is fixedly connected to the inner wall of the delivery pipe 16, a guide rod 36 is fixedly provided on the top of the inner wall of the fusion box 15, and the lower end of the guide rod 36 is fitted with the inner wall of the annular groove of the fixed frame 31, a rectangular block 4 is fixedly provided on the outer wall of the fixed frame 31, and the rectangular block 4 is fitted with the inner wall of the fixed plate 3, and the bottom of the annular groove of the fixed frame 31 is an inclined surface, a rubber ring 5 is sleeved on the outer wall of the disc 33, and the rubber ring 5 is fitted with the inner wall of the delivery pipe 16, and a conical guide tube 6 is fixedly provided on the inner wall of the fusion box 15;

[0029] When the fusion box 15 rotates, it will drive the guide rod 36 to rotate, and the guide rod 36 moves along the inner wall of the annular groove of the fixed frame 31. Since the inner wall of the annular groove is inclined, when the guide rod 36 is located at the high point of the inner wall of the annular groove, it will push the fixed frame 31 downward, and the fixed frame 31 moves downward along the fixed plate 3. The fixed frame 31 drives the connecting frame 32 and the disc 33 to move downward synchronously, and the disc 33 leaves the inside of the delivery pipe 16 and pulls the spring 34, and the flue gas passes through the upper end of the guide pipe 6 into the delivery pipe 16. Since the guide rod 36 is always rotating, when the guide rod 36 moves to the bottom of the inner wall of the annular groove, the disc 33 enters the delivery pipe 16, and through the rubber ring 5 on the outer wall of the disc 33, pressure is generated in the delivery pipe 16, and the flue gas is quickly delivered from the delivery pipe 16 to the burner body 11.

[0030] The above description 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 flue gas circulation boiler with a low-nitrogen burner, comprising a boiler body (1) and a burner body (11) connected to the boiler body (1), characterized in that: A mounting frame (12) is fixedly provided on the outer wall of the burner body (11), a protection box (13) is fixedly provided on the mounting frame (12), a fixing block (14) is fixedly provided on the inner wall of the protection box (13), a fusion box (15) is rotatably provided in the middle of the fixing block (14), a delivery pipe (16) is fixedly provided on the upper end of the protection box (13), the lower end of the delivery pipe (16) is rotatably connected to the fusion box (15), the upper end of the delivery pipe (16) is connected to the burner body (11), a gas inlet pipe (17) is fixedly provided on the lower end of the mounting frame (12), the upper end of the gas inlet pipe (17) is rotatably connected to the fusion box (15), a rotating assembly for driving the fusion box (15) to rotate is provided in the protection box (13), and a gas delivery assembly is provided in the fusion box (15).

2. The flue gas circulation boiler with a low nitrogen burner according to claim 1, characterized in that: The rotating assembly comprises a gear ring (2) fixedly connected to the outer wall of the fusion box (15), a motor (21) is fixedly arranged in the protection box (13), a pinion (22) is fixedly arranged at the output end of the motor (21), and the pinion (22) is meshed with the gear ring (2).

3. The flue gas circulation boiler with a low nitrogen burner according to claim 1, characterized in that: The gas delivery assembly comprises a fixing plate (3) fixedly connected to the inner wall of the fusion box (15); a fixing frame (31) is slidably provided in the middle of the fixing plate (3); a connecting frame (32) is fixedly provided inside the fixing frame (31); a disc (33) is fixedly provided at the upper end of the middle of the connecting frame (32); two springs (34) are fixedly provided on the upper surface of the disc (33); fixing rods (35) are fixedly provided at the upper ends of the two springs (34); one end of the two fixing rods (35) is fixedly connected to the inner wall of the delivery pipe (16); a guide rod (36) is fixedly provided at the top of the inner wall of the fusion box (15); the lower end of the guide rod (36) is in contact with the inner wall of the annular groove of the fixing frame (31).

4. The flue gas circulation boiler with a low nitrogen burner according to claim 3 is characterized in that: The outer wall of the disc (33) is sleeved with a rubber ring (5), and the rubber ring (5) is in contact with the inner wall of the delivery pipe (16).

5. The flue gas circulation boiler with a low nitrogen burner according to claim 1, characterized in that: A conical guide tube (6) is fixedly provided on the inner wall of the fusion box (15).

6. The flue gas circulation boiler with a low nitrogen burner according to claim 3, characterized in that: A rectangular block (4) is fixedly provided on the outer wall of the fixing frame (31), the rectangular block (4) is fitted with the inner wall of the fixing plate (3), and the bottom of the annular groove of the fixing frame (31) is an inclined surface.

7. The flue gas circulation boiler with a low nitrogen burner according to claim 1, characterized in that: The lower end of the gas inlet pipe (17) is provided with two gas inlets.

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