Rotary nozzle boiler pulse soot blower and working method thereof

Abstract

The invention provides a rotary nozzle boiler pulse soot blower and a working method thereof, and belongs to the technical field of boiler soot blowing. The problems that in the prior art, power for driving a nozzle to rotate is insufficient, and the structure is prone to damage are solved. The device comprises an inner core set, a rotating part cavity, an outer nozzle, a cooling air wall box device, an angle rotating mechanism and a base, the inner core set is connected with the rotating part cavity, the rotating part cavity is connected with the outer nozzle, the cooling air wall box device is installed on the outer side of the outer nozzle, the tail of the rotating part cavity is connected with the angle rotating mechanism, and the angle rotating mechanism is connected with the base. The outer nozzle is installed on the base, the angle rotating mechanism comprises a tooth column disc and blade teeth, the tooth column disc is connected with the blade teeth in a meshed mode, the tooth column disc is connected with a connecting shaft at the tail of the rotating part cavity, and the blade teeth are installed on the inner side of the L-shaped plate. The soot blower is mainly used for boiler soot blowing.

Description

Technical Field

[0001] The invention belongs to the technical field of boiler soot blowing, and particularly relates to a rotary nozzle boiler pulse soot blower and a working method thereof. Background Art

[0002] As a traditional soot blower, the types of gas pulse soot blowers are very few. The most common one is the fixed gas pulse soot blower, but this kind of soot blower can only blow soot in a single direction, which has certain limitations. In order to achieve a more comprehensive soot blowing effect (360° "dead angle free" soot blowing) in the prior art, several types of rotary pulse soot blowers have been derived accordingly. The mainstream ones are ① the combination of cylinder drive + one-way bearing (ratchet bearing) and ② the combination of motor reducer drive + chain and sprocket. However, they all have their own deficiencies. Firstly, for the combination of cylinder drive + one-way bearing, its power is weak, the internal environment of the boiler room is generally poor, ash blockage and jamming often occur, and the cylinder and one-way bearing are damaged relatively frequently. Secondly, for the combination of motor reducer drive + chain and sprocket, although the driving power is sufficient, the maintenance and replacement of the chain and sprocket structure are cumbersome, and there are problems such as flue gas backflow in the gun barrel and corrosion by condensate water. In addition to their respective problems, the above two types of soot blowers also have a common problem that the wall box at the connection with the boiler often has poor sealing. Due to the high temperature at the connection with the boiler, ordinary sealing rings cannot be used in this case. Summary of the Invention

[0003] In view of this, the present invention aims to provide a rotary nozzle boiler pulse soot blower and a working method thereof to solve the problems of insufficient power for driving the nozzle to rotate and easy damage of the structure in the prior art.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A rotary nozzle boiler pulse soot blower includes an inner core group, a rotary part chamber, an outer nozzle, a cooling air wall box device, an angle rotation mechanism and a base. The inner core group is connected to the rotary part chamber, the rotary part chamber is connected to the outer nozzle, a cooling air wall box device is installed outside the outer nozzle, the tail of the rotary part chamber is connected to the angle rotation mechanism, and the outer nozzle is installed on the base.

[0006] Furthermore, the angle rotation mechanism includes a tooth column disk and leaf teeth. The tooth column disk is meshed with the leaf teeth, the tooth column disk is connected to the connecting shaft at the tail of the rotary part chamber, and the leaf teeth are installed inside the L-shaped plate.

[0007] Furthermore, the outside of the tooth column disk is connected to a motor-reducer unit.

[0008] Furthermore, an angle positioning switch is installed below the tooth column disk, and a zero position alignment proximity switch is provided above the leaf teeth.

[0009] Furthermore, the leaf teeth are double-leaf teeth or triple-leaf teeth.

[0010] Furthermore, the cooling air wall box device includes a fluororubber skeleton seal, a cooling chamber, a steering pipe, and an air curtain chamber. The fluororubber skeleton seal is installed outside the outer nozzle. The two ends of the steering pipe are respectively communicated with the cooling chamber and the air curtain chamber. Both the cooling chamber and the air curtain chamber are arranged inside the fluororubber skeleton seal.

[0011] Furthermore, a high-water-based seal ring is provided in the middle of the fluororubber skeleton seal.

[0012] Furthermore, a labyrinth seal structure is provided on the outside of the part of the outer nozzle located inside the boiler, and a drain port is provided at the side end of the labyrinth seal structure.

[0013] Furthermore, the outer nozzle is installed on the base through a roller bracket.

[0014] A working method of a rotary nozzle boiler pulse soot blower includes the following steps:

[0015] Step 1: Insert the outer nozzle into the boiler to be soot-blown;

[0016] Step 2: Start the motor-reducer unit to drive the tooth column disk to rotate. Through the meshing action with the leaf teeth, the rotary part chamber and the outer nozzle are driven to make a rotary motion, so as to realize soot blowing without dead angles within 360° in the furnace;

[0017] Step 3: During the soot blowing process, the cooling air enters the cooling chamber from the inlet of the cooling air box wall device, and the fluororubber skeleton seal is isolated from the hot air returning from the boiler by the cold air;

[0018] Step 4: The cooling air in the cooling chamber enters the air curtain chamber through the steering pipe to form an air wall to resist the leakage of flue gas to the outside of the furnace along the soot blower.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] 1. The present invention can realize soot blowing within 360° in the circumferential direction of the nozzle, increase the coverage area of the spherical wave after deflagration, and no longer clean the fixed heating surface, thereby preventing damage to the heating surface.

[0021] 2. The present invention adopts a multi-point rotation mechanism in which the tooth column disk is meshed and connected with the leaf teeth. This structure is simple to install, low in cost, convenient to maintain, and the power meets the requirements of long-term use. In terms of accuracy, it can fully meet the use requirements of boiler soot blowing.

[0022] 3. The cooling air wall box device of the present invention has a dual function. It not only cools but also ensures the sealing performance at the connection between the boiler and the nozzle through a sealing ring, solving the problem that the wall box at the connection with the existing boiler often has poor sealing. Since the temperature at the connection with the boiler is relatively high, ordinary sealing rings cannot be used in this case. Moreover, the cooled air directly enters the air curtain chamber to form an air curtain, playing a role in preventing and isolating smoke and returning smoke.

[0023] 4. When the rotary nozzle explodes, a reaction force will be generated. To protect the bearings and sealing rings inside the rotary part chamber, a labyrinth seal structure is provided. This structure not only prevents the reaction force but also has a function of discharging the generated condensate water. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings forming a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0025] Figure 1 is a schematic structural view of a rotary nozzle boiler pulse soot blower according to the present invention;

[0026] Figure 2 is a schematic connection view of the tooth column disk and the double - leaf tooth according to the present invention;

[0027] Figure 3 is a schematic structural view of the three - leaf tooth;

[0028] Figure 4 is a cross - sectional view of the cooling air wall box device;

[0029] Figure 5 is a cross - sectional view of the labyrinth seal structure;

[0030] Figure 6 is a left view of a rotary nozzle boiler pulse soot blower.

[0031] In the figures:

[0032] 1 - motor - speed reducer unit, 2 - inner core group, 3 - rotary part chamber, 4 - outer nozzle, 5 - cooling air wall box device, 6 - angle positioning switch, 7 - angle rotation mechanism, 8 - zero - position alignment proximity switch, 9 - base, 10 - roller bracket, 11 - tooth column disk, 12 - leaf tooth, 13 - fluororubber skeleton seal, 14 - cooling chamber, 15 - steering pipe, 16 - high - water - based sealing ring, 17 - air curtain chamber, 18 - labyrinth seal structure, 19 - drain port. DETAILED DESCRIPTION OF THE INVENTION

[0033] The following will clearly and completely elaborate on the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other. The described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0034] Specific Embodiment 1: Refer to Figures 1-6 In this embodiment, a rotary nozzle boiler pulse soot blower includes an inner core group 2, a rotary part chamber 3, an outer nozzle 4, a cooling air wall box device 5, an angle rotation mechanism 7, and a base 9. The inner core group 2 is connected to the rotary part chamber 3, the rotary part chamber 3 is connected to the outer nozzle 4, a cooling air wall box device 5 is installed outside the outer nozzle 4, the tail of the rotary part chamber 3 is connected to the angle rotation mechanism 7, the outer nozzle 4 is installed on the base 9. The angle rotation mechanism 7 includes a tooth column disk 11 and leaf teeth 12. The tooth column disk 11 is meshed and connected with the leaf teeth 12. The tooth column disk 11 is connected to the connecting shaft at the tail of the rotary part chamber 3. The leaf teeth 12 are installed inside the L-shaped plate. The outside of the tooth column disk 11 is connected to the motor-reduction unit group 1.

[0035] Insert the outer nozzle 4 into the boiler to be soot blown, start the motor-reduction unit group 1, drive the tooth column disk 11 to rotate, and through the meshing action with the leaf teeth 12, drive the rotary part chamber 3 and the outer nozzle 4 to perform a rotary motion, realizing 360° dead-angle-free soot blowing in the furnace. During the soot blowing process, the cooling air enters the cooling chamber 14 from the cooling air box wall device inlet, isolates the fluororubber skeleton seal 13 from the hot air returning from the boiler through the cold air, and cools the fluororubber skeleton seal 13. The cooling air in the cooling chamber 14 enters the air curtain chamber 17 through the steering pipe 15 to form an air wall to resist the leakage of flue gas to the outside of the furnace along the soot blower. The tooth column disk 11 of this device has 18 columns, realizing an angle of 20° for each angle, achieving 360° soot blowing in the circumferential direction of the nozzle, increasing the coverage area of the spherical wave after deflagration, no longer cleaning the fixed heating surface, preventing damage to the heating surface. Adopt a multi-point rotation mechanism with the tooth column disk 11 meshed and connected with the leaf teeth 12. This structure is simple to install, low in cost, convenient to maintain, and the power meets the requirements for long-term use. In terms of accuracy, it can fully meet the use requirements of boiler soot blowing. Through the cooling air wall box device, it plays a dual role. Not only does it have a cooling effect, it can ensure the sealing performance at the connection between the boiler and the nozzle through the sealing ring, solving the problem that the wall box at the connection with the existing boiler often has poor sealing, and due to the high temperature at the connection with the boiler, ordinary sealing rings cannot be used in this case. Moreover, the cooled cooling air directly enters the air curtain chamber to form an air curtain, playing a role in preventing and isolating smoke and returning smoke.

[0036] Furthermore, the flatness of the device base 9 must be corrected to ensure that it is within ±0.2 mm of flatness. If it exceeds the range, mechanical methods will be used for leveling. The coaxiality of the inner core group 2, the rotating part chamber 3, and the outer nozzle 4 must be ≤0.3. When installing the fixed inner core tube group 2 and the base 9, the levelness must be ≤0.5 mm. The supporting wheels on the roller bracket 10 must ensure full contact with the outer gun barrel, and there should be no phenomenon of the gun barrel being "suspended". The coaxial bearings in the traveling device must ensure their coaxiality, and grease should be added after installation. When the inner core tube has special requirements, it can be chrome-plated to increase the surface hardness. The leaf teeth 12 and the tooth column disk 11 must ensure precision, and there should be no defects such as burrs and pits.

[0037] Specific Embodiment 2: Refer to Figures 1-6 This embodiment is described. An angle positioning switch 6 is installed below the tooth column disk 11, and a zero position alignment proximity switch 8 is provided above the leaf teeth 12. The zero position alignment proximity switch 8 plays a role in returning the nozzle to the zero position during rotation, that is, the nozzle opening faces downward, and the angle positioning proximity switch 6 controls the nozzle angle.

[0038] Specific Embodiment 3: Refer to Figures 2-3 This embodiment is described. The leaf teeth 12 are double leaf teeth or triple leaf teeth.

[0039] Specific Embodiment 4: Refer to Figures 1-6 This embodiment is described. The cooling air wall box device 5 includes a fluororubber skeleton seal 13, a cooling chamber 14, a steering pipe 15, and an air curtain chamber 17. The fluororubber skeleton seal 13 is installed outside the outer nozzle 4. The two ends of the steering pipe 15 are respectively connected to the cooling chamber 14 and the air curtain chamber 17. The cooling chamber 14 and the air curtain chamber 17 are both arranged within the fluororubber skeleton seal 13. A high water-based seal ring 16 is provided in the middle of the fluororubber skeleton seal 13. During the soot blowing process, the cooling air enters the cooling chamber 14 from the cooling air box wall device inlet, and the fluororubber skeleton seal 13 is isolated from the hot air returning from the boiler by the cold air. The cooling air in the cooling chamber 14 enters the air curtain chamber 17 through the steering pipe 15 to form an air wall to resist the leakage of flue gas along the soot blower to the outside of the furnace, providing double isolation to ensure safety.

[0040] Specific Embodiment 5: Refer to Figures 1-6 This embodiment is described. A labyrinth seal structure 18 is provided on the outer side of the part of the outer nozzle 4 located inside the boiler. A drain port 19 is provided at the side end of the labyrinth seal structure 18. Since a reaction force will be generated when the rotating nozzle explodes, in order to protect the bearings and seals inside the rotating part chamber, the labyrinth seal structure 18 is provided. This structure not only prevents the reaction force but also has the function of discharging the generated condensed water.

[0041] Specific Embodiment 6: Refer to Figures 1-6Description of this embodiment, a working method of a rotary nozzle boiler pulse soot blower, which comprises the following steps:

[0042] Step 1: Insert the outer nozzle 4 into the boiler to be soot blown;

[0043] Step 2: Start the motor-reduction unit 1, drive the tooth column disk 11 to rotate, and through the meshing action with the leaf teeth 12, further drive the rotary part chamber 3 and the outer nozzle 4 to make a rotary motion, so as to realize soot blowing without dead angle in the furnace at 360°;

[0044] Step 3: During the soot blowing process, the cooling air enters the cooling chamber 14 from the cooling air box wall device inlet, and isolates the fluororubber skeleton seal 13 from the hot air returning from the boiler through the cold air;

[0045] Step 4: The cooling air in the cooling chamber 14 enters the air curtain chamber 17 through the turning pipe 15 to form an air wall to resist the leakage of flue gas to the outside of the furnace along the soot blower.

[0046] The specific embodiments of the present invention disclosed above are only used to help illustrate the present invention. The specific embodiments do not describe all the details in detail, nor limit the invention to the specific embodiments described. According to the content of this specification, many modifications and changes can be made. These embodiments are selected and specifically described in this specification to better explain the principle and practical application of the present invention, so that those skilled in the art in the relevant technical field can well understand and utilize the present invention.

Claims

1. A rotary nozzle boiler pulse soot blower, characterized in that: The invention comprises an inner core group (2), a rotating chamber (3), an outer nozzle (4), a cooling air wall box device (5), an angle rotation mechanism (7) and a base (9), wherein the inner core group (2) is connected to the rotating chamber (3), the rotating chamber (3) is connected to the outer nozzle (4), the outer side of the outer nozzle (4) is provided with a cooling air wall box device (5), the tail of the rotating chamber (3) is connected to the angle rotation mechanism (7), and the outer nozzle (4) is installed on the base (9).

2. A rotary nozzle boiler pulse sootblower according to claim 1, characterized in that: The angle rotation mechanism (7) comprises a tooth column plate (11) and blade teeth (12), wherein the tooth column plate (11) and the blade teeth (12) are meshedly connected, the tooth column plate (11) is connected to a connecting shaft at the tail of the rotating chamber (3), and the blade teeth (12) are installed on the inner side of the L-shaped plate.

3. A rotary nozzle boiler pulse sootblower according to claim 2, characterized in that: The outer side of the gear column disc (11) is connected to the motor-reducer unit (1).

4. A rotary nozzle boiler pulse sootblower according to claim 2, characterized in that: An angle positioning switch (6) is installed below the tooth column plate (11), and a zero position alignment proximity switch (8) is provided above the blade teeth (12).

5. The rotary nozzle boiler pulse sootblower according to claim 2, characterized in that: The leaf teeth (12) are double leaf teeth or three leaf teeth.

6. The rotary nozzle boiler pulse sootblower according to claim 1, characterized in that: The cooling air wall box device (5) comprises a fluororubber frame seal (13), a cooling chamber (14), a steering pipe (15) and an air curtain chamber (17); the fluororubber frame seal (13) is installed on the outside of the outer nozzle (4); the two ends of the steering pipe (15) are respectively connected to the cooling chamber (14) and the air curtain chamber (17); the cooling chamber (14) and the air curtain chamber (17) are both arranged in the fluororubber frame seal (13).

7. The rotary nozzle boiler pulse sootblower according to claim 6, characterized in that: A high water-based sealing ring (16) is provided in the middle of the fluororubber skeleton seal (13).

8. The rotary nozzle boiler pulse sootblower according to claim 1, characterized in that: A labyrinth sealing structure (18) is provided on the outer side of the portion of the outer nozzle (4) located in the boiler, and a drainage port (19) is provided at the side end of the labyrinth sealing structure (18).

9. The rotary nozzle boiler pulse sootblower according to claim 1, characterized in that: The outer nozzle (4) is mounted on the base (9) via a roller bracket (10).

10. A method for operating a rotary nozzle boiler pulse soot blower according to any one of claims 1 to 9, characterized in that: It includes the following steps: Step 1: Insert the outer nozzle (4) into the boiler to be sootblown; Step 2: Start the motor-reducer unit (1) to drive the tooth column disc (11) to rotate, and through the meshing action with the blade teeth (12), drive the rotating chamber (3) and the outer nozzle (4) to rotate, so as to achieve 360° soot blowing without dead angles in the furnace; Step 3: During the soot blowing process, cooling air enters the cooling chamber (14) from the inlet of the cooling air box wall device, and the fluororubber skeleton seal (13) is isolated from the hot air returned from the boiler by the cold air; Step 4: The cooling air from the cooling chamber (14) enters the air curtain chamber (17) through the turning pipe (15), forming an air wall to prevent the smoke from leaking out of the furnace through the soot blower.

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