Soot blower for horizontal flue of boiler

Abstract

The utility model relates to the field of boiler soot blowing equipment, and discloses a soot blowing device for a horizontal flue of a boiler, which comprises a cyclone separator, a booster fan, an inner pipe, a gas guide sleeve, an outer pipe, a gas distribution cavity, a soot blowing head and a rotary driving component. The rotary driving component drives the inner pipe to rotate, the inner pipe drives the outer pipe to rotate synchronously, the outer pipe drives the soot blowing head to rotate, and the soot blowing angle can be adjusted, so that the soot blowing effect of the soot blower can be improved, and the problem that soot blowing is not thorough in the prior art is effectively solved.

Description

Technical Field

[0001] The utility model relates to the field of boiler soot blowing equipment, in particular to a soot blowing device for a boiler horizontal flue. Background Technique

[0002] When a coal-fired boiler operates at low load, ash will precipitate in the horizontal flue of the coal-fired boiler due to coal combustion. Excessive furnace ash on the heating surface will increase the thermal resistance of the heating surface, reduce the thermal conductivity coefficient, affect the heat transfer effect, increase the exhaust gas temperature, reduce the boiler efficiency, and in severe cases, it will even cause a tube explosion accident in the superheater. Therefore, the soot blowing device is regularly used to timely remove the ash in the horizontal flue to ensure the safety of the boiler.

[0003] Chinese Patent with publication number CN216346338U discloses a system for preventing ash accumulation in the horizontal flue of a boiler, including a furnace, a horizontal flue, a turning chamber, a cyclone separator and a booster fan; the outlet of the furnace is connected to the inlet of the horizontal flue, the outlet of the horizontal flue is connected to the turning chamber, the horizontal flue is provided with a superheater and a reheater, the bottom of the horizontal flue is provided with air caps, and a low-temperature heat exchanger is arranged in the turning chamber. Among them, a flue gas extraction port is arranged on the side wall of the turning chamber, the flue gas extraction port is connected to the inlet of the cyclone separator, and the outlet of the cyclone separator is connected to the air caps through the booster fan; although this patent can achieve the effect of soot blowing on the horizontal flue of the boiler, the blowing angle is not adjustable, and the problem of incomplete soot blowing is likely to occur. Content of the Utility Model

[0004] Based on the above problems, the purpose of the utility model is to provide a soot blowing device for a boiler horizontal flue to solve the problems existing in the above-mentioned prior art.

[0005] The utility model adopts the following technical scheme:

[0006] The utility model provides a soot blowing device for a boiler horizontal flue, including a cyclone separator and a booster fan. The inlet of the cyclone separator is communicated with the flue gas extraction port on the side wall of the turning chamber, and the outlet of the cyclone separator is communicated with the inlet of the booster fan. The device further includes:

[0007] An inner tube, which is a structure with both ends closed and a hollow interior. One end of the inner tube is located inside the horizontal flue, and the other end penetrates to the outside of the horizontal flue, and the inner tube is rotationally and sealingly connected to the horizontal flue;

[0008] A gas guide sleeve, which is rotationally and sealingly sleeved on the inner tube. The gas guide sleeve is located outside the horizontal flue and is connected to the outer wall of the horizontal flue; the outlet of the booster fan is communicated with the interior of the inner tube through the gas guide sleeve;

[0009] An outer pipe, the outer pipe is located inside the horizontal flue, the outer pipe is sleeved on the outer periphery of the inner pipe, and both ends thereof are connected to the outer wall of the inner pipe through retaining rings; the outer pipe, the retaining rings, and the inner pipe together enclose an air distribution chamber, and the air distribution chamber is communicated with the inside of the inner pipe;

[0010] A soot blowing head, the soot blowing head is arranged on the outer pipe and is communicated with the air distribution chamber;

[0011] A rotary drive member, the rotary drive member is arranged outside the horizontal flue, and its output shaft is power-connected to the end face of the inner pipe.

[0012] Further, the soot blowing head includes a soot blowing pipe, the soot blowing pipe is a structure with both ends open and hollow inside, one side of which is connected to the outer pipe and is communicated with the air distribution chamber; soot blowing holes are provided on the circumferential side wall of the soot blowing pipe, and a cover body is movably sleeved on the side of the soot blowing pipe away from the outer pipe, and the cover body seals or opens the soot blowing holes through an adjusting assembly.

[0013] Still further, the adjusting assembly includes an adjusting rod arranged in the soot blowing pipe, one end of the adjusting rod is connected to the cover body, and the other end penetrates through a perforated plate and is slidably connected thereto, and the perforated plate is connected to the inner wall of the soot blowing pipe; a tension spring is sleeved on the outer periphery of the adjusting rod, the upper end of the tension spring is connected to the adjusting rod, and the lower end is connected to the perforated plate.

[0014] Still further, a limiting block is connected to the end of the adjusting rod away from the cover body.

[0015] Still further, a plurality of air guide holes are provided on the circumferential side wall of the inner pipe, and all the plurality of air guide holes are within the range surrounded by the air guide sleeve, and the inside of the air guide sleeve is communicated with the inside of the inner pipe through the air guide holes.

[0016] Compared with the prior art, the beneficial technical effects of the present utility model are:

[0017] By driving the inner pipe to rotate through the rotary drive member, the inner pipe drives the outer pipe to rotate synchronously, and the outer pipe drives the soot blowing head to rotate, so that the angle of soot blowing can be adjusted, thereby improving the soot blowing effect of the present utility model and effectively solving the problem of incomplete soot blowing existing in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present utility model will be further described below with reference to the drawings.

[0019] Figure 1 It is a schematic structural diagram of the soot blowing device for the boiler horizontal flue of the present utility model;

[0020] Figure 2This is a top view of the inner tube and the outer tube of the present utility model;

[0021] Figure 3 This is a cross-sectional view of the air guide sleeve of the present utility model;

[0022] Figure 4 This is a cross-sectional view of the soot blower head of the present utility model.

[0023] Explanation of reference numerals in the drawings: 1, cyclone separator; 2, booster fan; 3, inner tube; 301, through hole; 302, air guide hole; 4, air guide sleeve; 5, outer tube; 6, air distribution cavity; 7, soot blower head; 71, soot blowing pipe; 72, soot blowing hole; 73, cover body; 74, adjustment assembly; 741, adjustment rod; 742, perforated plate; 7421, air passing hole; 743, tension spring; 75, limit block; 8, rotation driving member. Specific embodiments

[0024] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model more clear and understandable, the present utility model will be further described in detail below with reference to the drawings and embodiments.

[0025] As Figures 1-4 shown, in this embodiment, a soot blowing device for a boiler horizontal flue is disclosed, which includes a cyclone separator 1 and a booster fan 2. The inlet of the cyclone separator 1 is communicated with the flue gas suction port on the side wall of the turning chamber, and the outlet of the cyclone separator 1 is communicated with the inlet of the booster fan 2; the inner tube 3 is a structure with both ends closed and hollow inside. One end of the inner tube 3 is located inside the horizontal flue, and the other end penetrates to the outside of the horizontal flue, and the inner tube 3 is rotationally and sealingly connected with the side wall of the horizontal flue; the air guide sleeve 4 is rotationally and sealingly sleeved on the inner tube 3. The air guide sleeve 4 is located outside the horizontal flue, and the outer wall of the air guide sleeve 4 is fixedly connected with the outer wall of the horizontal flue through a connecting rod; the air outlet of the booster fan 2 is communicated with the inside of the inner tube 3 through the air guide sleeve 4; the outer tube 5 is located inside the horizontal flue, and the outer tube 5 is sleeved on the outer periphery of the inner tube 3, and both ends thereof are fixedly connected with the outer wall of the inner tube 3 through a retaining ring; the outer tube 5, the retaining ring and the inner tube 3 together enclose an air distribution cavity 6, and the air distribution cavity 6 is communicated with the inside of the inner tube 3; the soot blower head 7 is arranged on the outer tube 5 and is communicated with the air distribution cavity 6; the rotation driving member 8 is arranged outside the horizontal flue, and its output shaft is power-connected with the end face of the inner tube 3.

[0026] In this embodiment, a plurality of through holes 301 are provided on the circumferential side wall of the inner tube 3. The plurality of through holes 301 are all within the range surrounded by the outer tube 5. The air distribution cavity 6 is communicated with the inside of the inner tube 3 through the through holes 301. A plurality of air guide holes 302 are provided on the circumferential side wall of the inner tube 3. The plurality of air guide holes 302 are all within the range surrounded by the air guide sleeve 4. The inside of the air guide sleeve 4 is communicated with the inside of the inner tube 3 through the air guide holes 302. Rotary sealing rings are arranged on both sides of the air guide holes 302. The two sides of the air guide sleeve 4 and the inner tube 3 are rotationally sealed through the rotary sealing rings. The number of soot blowing heads 7 is set to be plural, and the plural soot blowing heads 7 are arranged at intervals along the axial direction of the outer tube 5. The rotary driving member 8 is set as a self-locking motor. The rotary driving member 8 is fixedly installed on the mounting seat, and the mounting seat is fixed on the ground.

[0027] The working principle of the above technical solution is as follows: The booster fan 2 pressurizes the high-temperature flue gas separated by the cyclone separator 1 and then transports it to the air guide sleeve 4. The flue gas in the air guide sleeve 4 enters the inside of the inner tube 3 through the air guide holes 302, and then enters the air distribution cavity 6 through the through holes 301. The flue gas in the air distribution cavity 6 can be blown out through the soot blowing heads 7.

[0028] Adopting this solution, the inner tube 3 is driven to rotate by the rotary driving member 8. The inner tube 3 drives the outer tube 5 to rotate synchronously, and the outer tube 5 drives the soot blowing heads 7 to rotate, so that the angle of soot blowing can be adjusted, thereby improving the soot blowing effect of the present invention and effectively solving the problem of incomplete soot blowing in the prior art.

[0029] In a further optimized solution, the soot blowing head 7 includes a soot blowing pipe 71. The soot blowing pipe 71 has an open structure at both ends and a hollow interior. One side of it is fixedly connected to the outer tube 5 and is communicated with the air distribution cavity 6. Soot blowing holes 72 are provided on the circumferential side wall of the soot blowing pipe 71. A cover body 73 is movably covered on the side of the soot blowing pipe 71 away from the outer tube 5. The cover body 73 blocks or opens the soot blowing holes 72 through the adjusting assembly 74.

[0030] Adopting this solution, through the mutual cooperation of the adjusting assembly 74 and the cover body 73, the soot blowing holes 72 can be opened when the present invention works, and the soot blowing holes 72 can be closed when the present invention does not work, which can not only ensure the normal operation of the present invention, but also avoid the situation of blockage of the soot blowing holes 72.

[0031] In a further optimized solution, the adjusting assembly 74 includes an adjusting rod 741 arranged in the soot blowing pipe 71. One end of the adjusting rod 741 is fixedly connected to the cover body 73, and the other end passes through the porous plate 742 and is slidably connected thereto. The porous plate 742 is fixedly connected to the inner wall of the soot blowing pipe 71. A tension spring 743 is sleeved on the outer periphery of the adjusting rod 741. The upper end of the tension spring 743 is fixedly connected to the adjusting rod 741, and the lower end is fixedly connected to the porous plate 742.

[0032] In this embodiment, a plurality of air passing holes 7421 are provided on the porous plate 742, and the flue gas in the air distribution chamber 6 can enter the area between the porous plate 742 and the cover body 73 through the air passing holes 7421; in the initial state, the area between the porous plate 742 and the cover body 73 is a closed space; as the flue gas in this closed space increases, the gas pressure will gradually increase, and under the action of the gas pressure, the cover body 73 and the adjusting rod 741 will slide in a direction away from the outer tube 5; when the cover body 73 no longer blocks the soot blowing hole 72, the flue gas can be ejected through the soot blowing hole 72; at this time, the tension spring 743 is in a stretched state; when the present utility model does not work, under the action of the restoring force of the tension spring 743, the cover body 73 and the adjusting rod 741 will slide in a direction close to the outer tube 5, and finally the cover body 73 can block the soot blowing hole 72.

[0033] With this solution, by providing the adjusting rod 741 and the tension spring 743, the soot blowing hole 72 can be automatically opened when the present utility model works, and the soot blowing hole 72 can be automatically closed when the present utility model does not work.

[0034] In a further optimized solution, a limiting block 75 is fixedly connected to the end of the adjusting rod 741 away from the cover body 73. By providing the limiting block 75, the adjusting rod 741 can be limited, and the situation that the adjusting rod 741 disengages from the porous plate 742 can be avoided.

[0035] The embodiments described above are only descriptions of the preferred modes of the present utility model, and do not limit the scope of the present utility model. Without departing from the design spirit of the present utility model, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present utility model shall fall within the protection scope determined by the claims of the present utility model.

Claims

1. A soot blowing device for a boiler's horizontal flue, comprising a cyclone separator (1) and a booster fan (2). The inlet of the cyclone separator (1) is communicated with the flue gas suction port on the side wall of the turning chamber, and the outlet of the cyclone separator (1) is communicated with the inlet of the booster fan (2), characterized in that: Further included are: An inner tube (3), the inner tube (3) has a structure with both ends closed and hollow inside, one end of the inner tube (3) is located inside the horizontal flue, the other end penetrates to the outside of the horizontal flue, and the inner tube (3) is rotationally and sealingly connected to the horizontal flue; An air guide sleeve (4), the air guide sleeve (4) is rotationally and sealingly sleeved on the inner tube (3), the air guide sleeve (4) is located outside the horizontal flue and is connected to the outer wall of the horizontal flue; the air outlet of the booster fan (2) is communicated with the inside of the inner tube (3) through the air guide sleeve (4); An outer tube (5), the outer tube (5) is located inside the horizontal flue, the outer tube (5) is sleeved on the outer periphery of the inner tube (3), and both ends thereof are connected to the outer wall of the inner tube (3) through retaining rings; the outer tube (5), the retaining rings and the inner tube (3) jointly enclose an air distribution cavity (6), and the air distribution cavity (6) is communicated with the inside of the inner tube (3); A soot blowing head (7), the soot blowing head (7) is arranged on the outer tube (5) and is communicated with the air distribution cavity (6); A rotation driving member (8), the rotation driving member (8) is arranged outside the horizontal flue, and its output shaft is power-connected to the end face of the inner tube (3).

2. The soot blowing device for the horizontal flue of the boiler according to claim 1, wherein: The soot blowing head (7) includes a soot blowing pipe (71), the soot blowing pipe (71) has a structure with both ends open and hollow inside, one side thereof is connected to the outer tube (5) and is communicated with the air distribution cavity (6); soot blowing holes (72) are provided on the peripheral side wall of the soot blowing pipe (71), a cover body (73) is movably covered on the side of the soot blowing pipe (71) away from the outer tube (5), and the cover body (73) blocks or opens the soot blowing holes (72) through an adjusting assembly (74).

3. The soot blowing device for the horizontal flue of the boiler according to claim 2, characterized in that: The adjusting assembly (74) includes an adjusting rod (741) arranged in the soot blowing pipe (71), one end of the adjusting rod (741) is connected to the cover body (73), the other end penetrates through a perforated plate (742) and is slidably connected thereto, and the perforated plate (742) is connected to the inner wall of the soot blowing pipe (71); a tension spring (743) is sleeved on the outer periphery of the adjusting rod (741), the upper end of the tension spring (743) is connected to the adjusting rod (741), and the lower end is connected to the perforated plate (742).

4. The soot blowing device for the horizontal flue of the boiler according to claim 3, wherein: A limiting block (75) is connected to the end of the adjusting rod (741) away from the cover body (73).

5. The sootblowing device for the horizontal flue of the boiler according to claim 1, characterized in that: A plurality of air guide holes (302) are provided on the peripheral side wall of the inner tube (3), and all the plurality of air guide holes (302) are within the range surrounded by the air guide sleeve (4), and the inside of the air guide sleeve (4) is communicated with the inside of the inner tube (3) through the air guide holes (302).

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