Efficient soot blower for power plant boiler

Abstract

The invention relates to the technical field of boiler soot blowing, and particularly discloses a power plant boiler efficient soot blowing device which comprises a steam pipe, a valve arranged on the steam pipe and a steam nozzle arranged at one end of the steam pipe and used for blowing soot. A dust suction mechanism is arranged on the steam spray head, the dust suction mechanism comprises a rotary drum which is arranged on the outer side of the steam spray head and rotates around the axis of the steam spray head, grooves are uniformly formed in the outer wall of the rotary drum, and racks are arranged on the two sides of an inner cavity of each groove respectively. According to the efficient soot blowing device for the power plant boiler, the arranged soot suction mechanism is matched with a driving source to further suck and remove dust drifting away from a hearth after soot blowing is finished, the situation that the dust is accumulated and attached to a heated surface again is avoided, the soot blowing effect is improved, and the soot suction branch pipe can rotate while moving back and forth in cooperation with the rotating mechanism, so that the soot blowing efficiency is improved. Therefore, the dust suction range is widened, the structure is compact, and use is convenient.

Description

Technical Field

[0001] The invention relates to the technical field of boiler sootblowing, and in particular to a high-efficiency sootblowing device for a boiler in a power plant. Background Art

[0002] As a key equipment for energy conversion, the operating efficiency and maintenance status of power plant boilers are directly related to the cost of power production and environmental protection indicators. During the operation of the boiler, the ash produced by fuel combustion will be deposited on the heating surface to form an ash layer, which will not only reduce the heat transfer efficiency of the boiler and increase fuel consumption, but may also cause problems such as overheating and corrosion of the heating surface, and even affect the safe operation of the boiler in severe cases. Therefore, the application of efficient sootblowing devices is crucial to keep the interior of the boiler clean and improve the overall operating efficiency.

[0003] At present, the traditional soot blowing method mostly adopts steam soot blowing, that is, steam is sprayed to the heating surface through a high-pressure steam nozzle, and the high-speed flow and kinetic energy impact of steam are used to remove the ash attached to the heating surface. Steam soot blowing has the advantages of simple operation and wide application range, but it also exposes some problems in practical applications. In particular, when the steam nozzle completes a soot blowing cycle, due to the influence of the front airflow, there are often more dust particles floating in the furnace. These particles will not completely settle due to gravity in a short time, but will continue to float in the furnace. After the steam nozzle stops spraying and the steam pressure drops, these floating dust particles will gradually diffuse to the surrounding area and re-deposit due to the lack of sufficient driving force to maintain their suspension state, and often accumulate on the soot-blown heating surface again. This phenomenon is called "re-deposition". Re-deposition not only weakens the effect of the soot blowing operation, but may also accelerate the wear of the heating surface, shorten the life of the equipment, and even form hard scale that is more difficult to remove in some cases, further reducing the efficiency of the boiler.

[0004] Therefore, it is necessary to propose an efficient sootblowing device for power plant boilers to solve the above problems. Summary of the invention

[0005] The main purpose of the present invention is to provide a high-efficiency sootblowing device for a power plant boiler, which can effectively solve the problems in the background technology.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] A high-efficiency sootblowing device for a power plant boiler comprises a steam pipe, a valve arranged on the steam pipe, and a steam nozzle arranged at one end of the steam pipe for sootblowing;

[0008] The steam nozzle is provided with an ash suction mechanism, which includes a rotating drum which is arranged at the outside of the steam nozzle and rotates around the axis of the steam nozzle, the outer wall of the rotating drum is evenly provided with grooves, racks are respectively provided on both sides of the inner cavity of the groove, and the two racks in each groove are staggered, the outer side of the rotating drum is movably connected with a movable sleeve along the axial direction of the rotating drum, the outer side of the movable sleeve is fixedly provided with an ash suction branch pipe corresponding to the groove one by one, the surface of the ash suction branch pipe is provided with ash suction holes, the inner side of the ash suction branch pipe is rotatably connected with a rotating shaft, the end of the ash suction branch pipe away from the movable sleeve is connected with a wind hood, the end of the rotating shaft away from the movable sleeve extends to the inner side of the wind hood and is provided with fan blades, and the wind hood is away from the ash suction branch pipe. A connecting pipe is provided at one end, and the end of the connecting pipe away from the wind hood is connected to a dust collecting ring located outside the steam nozzle. The dust collecting ring is located at one end of the ash suction branch pipe close to the steam pipe, and an annular opening is provided at one end of the dust collecting ring close to the steam pipe, and an annular filter plate is provided on the inner side of the annular opening. The end of the rotating shaft close to the movable sleeve extends to the inner side of the groove and is provided with a pair of second gears corresponding to and meshing with the rack one by one. A one-way bearing is fixed to the outer wall of the corresponding part of the rotating shaft and the second gear. The second gear is fixed to the outer wall of the one-way bearing, and the rotation directions of the pair of one-way bearings at the end of each rotating shaft are opposite. A driving source for driving the movable sleeve to move outside the rotating drum is provided at one end of the steam nozzle close to the steam pipe.

[0009] Preferably, it also includes a rotating mechanism for guiding the movable sleeve and the rotating drum to rotate as a whole, the rotating mechanism includes a guide cylinder fixedly arranged on the outside of the steam nozzle, and the guide cylinder is located inside the rotating drum, the outer wall of the guide cylinder is provided with a second spiral guide groove, the inner wall of one of the grooves is provided with a first through groove corresponding to the guide cylinder, and a spherical guide block is provided at one end of the rotating shaft corresponding to the first through groove close to the rotating drum, the guide block passes through the first through groove and cooperates with the movable guide of the second guide groove.

[0010] Preferably, the driving source includes a fixed frame arranged at one end of the steam pipe, a traction main frame is horizontally movably connected to a side of the fixed frame close to the steam nozzle, a second pulling groove is arranged at an end of the traction main frame close to the fixed frame, a turntable is arranged at the bottom of the traction main frame, a traction wheel movably connected to the second pulling groove is arranged at one end of the top of the turntable, a motor for driving the turntable to rotate is arranged at one end of the bottom of the fixed frame, a first pulling groove is arranged at one end of the traction main frame close to the steam nozzle, a swivel is rotatably connected to an end of the movable sleeve close to the steam pipe, a traction sub-frame is fixed to the side wall of the swivel, and the traction sub-frame is displaced along the axial direction of the steam nozzle, and an arc plate is arranged at the bottom of the end of the traction sub-frame away from the swivel, and a pin connected to the first pulling groove is vertically arranged on the arc plate.

[0011] Preferably, a guide rod movably and guidely connected to the fixing frame is provided on one side of the traction main frame close to the fixing frame.

[0012] Preferably, a swinging assembly for horizontal swinging of the steam nozzle is provided at the end close to the steam nozzle and the steam pipe, the swinging assembly includes a second connector in an arc shape which is arranged at one end of the steam nozzle close to the steam pipe, the second connector is provided with a through hole connected to the steam nozzle, the end of the steam pipe close to the steam nozzle is provided with a first connector in an arc shape, the first connector is provided with a through hole connected to the steam pipe, the second connector is rotatably connected to the inside of one side of the first connector, a first gear corresponding to a traction main frame is fixed to the bottom of the second connector, and gear teeth meshing with the first gear are evenly provided at one end of the inner side of the traction main frame.

[0013] Preferably, the steam nozzle is provided with a pressure drive assembly for controlling the lifting and lowering of the latch, the pressure drive assembly includes a pressure storage cylinder arranged on the top of the steam nozzle and connected to the steam nozzle, a piston rod is vertically and movably connected to the inner side of the pressure storage cylinder, a second spring is arranged between the top of the piston rod and the inner top wall of the pressure storage cylinder, a lifting plate corresponding to the piston rod and the arc plate is arranged at the bottom of the steam nozzle, and the lifting plate is located at the top of the arc plate, the lower end of the piston rod extends to the bottom of the steam nozzle and is connected to the lifting plate, so that when the steam nozzle is in the spraying state, the piston The rod drives the lifting plate to rise, and when the spraying stops, the second spring resets and drives the lifting plate to move downward, a fixed cylinder is arranged through the arc plate, the latch is vertically movably connected to the inner side of the fixed cylinder, a stop block is arranged on the inner wall of the fixed cylinder, and a side wall of the latch is provided with a second through groove which slides with the stop block, a fourth spring is arranged between the top wall of the inner cavity of the second through groove and the top of the stop block, and it is configured that when the fourth spring is in the reset state, the lower end of the latch disengages from the first pulling groove, the top of the latch slides with the bottom wall of the lifting plate, and the lifting plate is used to push the latch to move downward.

[0014] Preferably, an ash hole for discharging ash is provided at one end of the dust collecting ring, and a sealing assembly is provided in the ash hole. The sealing assembly includes a sealing cone arranged on the inner side of the dust collecting ring for plugging and cooperating with the ash hole, a guide column corresponding to the sealing cone is fixedly provided on one side of the interior of the dust collecting ring, one end of the sealing cone is movably sleeved on the outer side of the guide column, a first spring is provided between the side of the sealing cone close to the guide column and the inner wall of the dust collecting ring, and the sealing cone and the ash hole are in a tightly plugged state when the first spring is in a reset state.

[0015] Preferably, a pusher for driving the displacement of the sealing cone is provided at the bottom of the lifting plate, and the pusher includes an ash falling frame fixed to one end of the bottom of the lifting plate, and a positioning pin located at the bottom of the dust collecting ring is vertically provided at the lower end of the ash falling frame, and the positioning pin is used to be plugged and matched with the inner side of one end of the sealing cone away from the guide column;

[0016] When the movable sleeve is located at one end of the rotating drum close to the steam pipe, the sealing cone is just located on the top of the positioning needle, and is configured so that when the steam nozzle is in a spraying state, the positioning needle and the inner side of the end of the sealing cone away from the guide column are plugged in, and when the spraying stops, the positioning needle and the sealing cone are in a separated state.

[0017] Preferably, the traction sub-frame is provided with a knocking assembly for knocking the filter plate, the knocking assembly includes a cleaning rod arranged on the side wall of the traction sub-frame, and the cleaning rod is located on the side of the dust collecting ring close to the filter plate, and a sliding groove is provided on the side of the cleaning rod close to the filter plate, and the sliding groove is slidably connected with a floating frame, and a third spring is provided between the side of the floating frame close to the sliding groove and the inner wall of the sliding groove, and a knocking head corresponding to the filter plate is provided at one end of the floating frame close to the filter plate, and a driving block corresponding to one end of the floating frame is evenly provided on the circumferential side wall of the dust collecting ring, and the end of the driving block close to the floating frame is an inclined surface, and the corresponding parts of the floating frame and the driving block are rotatably connected with rollers.

[0018] Preferably, an arc-shaped guide rail is disposed on the inner wall of the first connector, and a first guide groove corresponding to the guide rail is disposed on the top and bottom of the second connector, and the guide rail is movably guided and connected to the inner side of the first guide groove.

[0019] Compared with the prior art, the present invention provides a high-efficiency sootblowing device for power plant boilers, which has the following features:

[0020] Beneficial effects:

[0021] 1. The high-efficiency sootblowing device of the power plant boiler can further absorb and remove the dust floating in the furnace after the sootblowing is completed through the soot suction mechanism and the driving source, thereby avoiding the dust from accumulating again and adhering to the heating surface, and improving the sootblowing effect. In combination with the rotating mechanism, the soot suction branch pipe can be rotated while being moved back and forth, thereby increasing the soot suction range, and only one driving source is required to realize the rotation, displacement and soot suction of the soot suction branch pipe, with a compact structure and easy use.

[0022] 2. The high-efficiency sootblowing device of the power plant boiler can increase the spray range when the steam nozzle is spraying through the swing component, thereby improving the sootblowing efficiency, and shares the driving source with the soot suction mechanism, which is easy to use. In combination with the pressure drive component, the soot suction can be stopped when the steam nozzle is spraying sootblowing, and only soot suction can be performed after the sootblowing is completed. The steam pressure in the steam nozzle is used to realize the switching between soot suction and sootblowing. The structure is compact and easy to use.

[0023] 3. The high-efficiency soot blowing device of the power plant boiler can discharge the dust obtained from the previous soot suction during soot blowing through the cooperation of the ash dropping holes, sealing components and pushing parts. It also uses the pressure drive components to realize the ash discharge, which is easy to use.

[0024] 4. The high-efficiency sootblowing device of the power plant boiler can automatically realize intermittent knocking of the filter plate by the rotation of the dust collecting ring through the set knocking assembly, which is convenient for knocking off dust, avoiding blockage and facilitating subsequent use. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the present invention;

[0026] Figure 2 It is a structural schematic diagram of another perspective of the present invention;

[0027] Figure 3 It is a schematic diagram of the structure of the steam nozzle and the fixing frame of the present invention in a disassembled state;

[0028] Figure 4 It is a structural schematic diagram of the present invention in which the traction main frame and the turntable are disassembled;

[0029] Figure 5 It is a schematic diagram of the specific structure of the first connector and the second connector of the present invention;

[0030] Figure 6 The present invention Figure 5 A structural diagram from another perspective based on the above;

[0031] Figure 7 It is a schematic diagram of the overall structure of the steam nozzle, the rotating drum and the movable sleeve of the present invention;

[0032] Figure 8 The present invention Figure 7 Schematic diagram of the structure of the steam nozzle and the drum in the disassembled state;

[0033] Fig. 9 The present invention Figure 8 Schematic diagram of the structure of the base with the rotating drum, guide drum, rotating ring and movable sleeve in the disassembled state;

[0034] Fig.10 It is a schematic diagram of the longitudinal cross-section structure of one end of the rotating drum of the present invention;

[0035] Fig.11 It is a schematic diagram of the longitudinal cross-section structure of the movable sleeve and the ash suction branch pipe of the present invention;

[0036] Fig.12 It is a structural schematic diagram of the guide block of the present invention;

[0037] Fig.13 It is a schematic diagram of the structure of the filter plate, the sealing cone and the dust collecting ring of the present invention in a disassembled state;

[0038] Fig.14 It is a schematic diagram of the structure of the pressure storage cylinder, the movable sleeve, the ash falling rack and the steam nozzle of the present invention in a disassembled state;

[0039] Fig.15 It is a schematic diagram of the overall structure of the traction sub-frame, the swivel and the arc-shaped plate of the present invention;

[0040] Fig.16 It is a schematic diagram of the structure of the floating frame and the cleaning rod of the present invention in a disassembled state;

[0041] Fig.17 It is a schematic diagram of the structure of the present invention when the latch and the fixing cylinder are disassembled.

[0042] In the figure: 1, steam nozzle; 2, fixed frame; 3, steam pipe; 4, valve; 5, ash suction branch pipe; 6, ash suction hole; 7, wind cover; 8, connecting pipe; 9, dust collecting ring; 10, rotating drum; 11, moving sleeve; 12, rotating ring; 13, first connecting head; 14, second connecting head; 15, filter plate; 16, motor; 17, traction main frame; 18, pressure storage cylinder; 19, rotating disk; 20, first pulling groove; 21, second pulling groove; 22, guide rod; 23, pulling wheel; 24, first gear; 25, first guide groove; 26, guide rail; 27, traction auxiliary frame; 28, cleaning rod; 29, protective plate; 30, Ash drop frame; 31. lifting plate; 32. guide cylinder; 33. second guide groove; 34. groove; 35. rack; 36. first through groove; 37. rotating shaft; 38. fan blade; 39. second gear; 40. guide block; 41. driving block; 42. ash drop hole; 43. sealing cone; 44. first spring; 45. guide column; 46. piston rod; 47. second spring; 48. stop block; 49. positioning pin; 50. roller; 51. arc plate; 52. fixing cylinder; 53. latch; 54. floating frame; 55. knocking head; 56. third spring; 57. sliding groove; 58. second through groove; 59. fourth spring. DETAILED DESCRIPTION

[0043] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0044] like Figure 1-Figure 12 , Fig.15As shown, a high-efficiency sootblowing device for a power plant boiler comprises a steam pipe 3, a valve 4 arranged on the steam pipe 3, and a steam nozzle 1 arranged at one end of the steam pipe 3 for sootblowing, wherein the valve 4 is used to control the on and off of steam, and an ash suction mechanism is arranged on the steam nozzle 1, and the ash suction mechanism comprises a rotating drum 10 arranged on the outside of the steam nozzle 1 and rotating around the axis of the steam nozzle 1, and the outer wall of the rotating drum 10 is evenly provided with grooves 34, and racks 35 are respectively arranged on both sides of the inner cavity of the groove 34, and the two racks 35 in each groove 34 are staggered, and the outer side of the rotating drum 10 is movably connected with a movable sleeve 11 along the axial direction of the rotating drum 10, and the outer side of the movable sleeve 11 is fixedly provided with an ash suction branch pipe 5 corresponding to the groove 34 one by one, and the surface of the ash suction branch pipe 5 is provided with ash suction holes 6, A rotating shaft 37 is rotatably connected to the inner side of the ash suction branch pipe 5. The end of the ash suction branch pipe 5 away from the movable sleeve 11 is connected to the wind hood 7. The end of the rotating shaft 37 away from the movable sleeve 11 extends to the inner side of the wind hood 7 and is provided with a fan blade 38. The end of the wind hood 7 away from the ash suction branch pipe 5 is provided with a connecting pipe 8. The end of the connecting pipe 8 away from the wind hood 7 is connected to a dust collecting ring 9 located outside the steam nozzle 1. The dust collecting ring 9 is located at the end of the ash suction branch pipe 5 close to the steam pipe 3, and the end of the dust collecting ring 9 close to the steam pipe 3 is provided with an annular opening, and an annular filter plate 15 is provided inside the annular opening. The end of the rotating shaft 37 close to the movable sleeve 11 extends to the inner side of the groove 34 and is provided with a pair of second gears 39 corresponding to and meshing with the rack 35. The rotating shaft 37 and the second gear 39 are meshed with each other. A one-way bearing is fixed on the outer wall at the corresponding position, the second gear 39 is fixed on the outer wall of the one-way bearing, and the rotation directions of a pair of one-way bearings at the end of each rotating shaft 37 are opposite, and in order to cover the groove 34 and prevent dust from entering, a protective plate 29 corresponding to the groove 34 is arranged on the inner wall of the movable sleeve 11, and the protective plate 29 is slidably matched with the outer wall of the rotating drum 10, and the protective plate 29 can always cover the groove 34 during the displacement of the movable sleeve 11. A driving source for driving the movable sleeve 11 to move outside the rotating drum 10 is arranged at one end of the steam nozzle 1 close to the steam pipe 3. As a preferred embodiment, the driving source includes a fixed frame 2 arranged at one end of the steam pipe 3, and a traction main frame 17 is horizontally movably connected to one side of the fixed frame 2 close to the steam nozzle 1. The traction main frame 17 is provided with a guide rod 22 movably connected to the fixed frame 2 on one side thereof, thereby increasing the stability of the traction main frame 17. The traction main frame 17 is provided with a second pulling groove 21 on one end thereof close to the fixed frame 2. A turntable 19 is provided at the bottom of the traction main frame 17. A pulling wheel 23 movably connected to the second pulling groove 21 is provided at one end of the top of the turntable 19. A motor 16 for driving the turntable 19 to rotate is provided at one end of the bottom of the fixed frame 2. A first pulling groove 20 is provided at one end of the traction main frame 17 close to the steam nozzle 1. A swivel 12 is rotatably connected to one end of the movable sleeve 11 close to the steam pipe 3. A traction sub-frame 27 is fixed to the side wall of the swivel 12. The traction sub-frame 27 is displaced along the axial direction of the steam nozzle 1. Specifically,A linear guide rail corresponding to the traction sub-frame 27 is arranged on the side wall of the steam spray head 1, and one end of the traction sub-frame 27 cooperates with the movable guide of the linear guide rail to ensure that the traction sub-frame 27 can only move back and forth along the axial direction of the steam spray head 1. An arc plate 51 located below the steam spray head 1 is arranged at the bottom of one end of the traction sub-frame 27 away from the rotating ring 12, and a latch 53 plugged into the first pulling groove 20 is vertically arranged on the arc plate 51, and the first pulling groove 20 and the second pulling groove 21 are both strip-shaped;

[0045] like Figure 9-10 , Fig.12 As shown, in order to further increase the dust suction range, it also includes a rotating mechanism for guiding the movable sleeve 11 and the rotating drum 10 to rotate as a whole, the rotating mechanism includes a guide cylinder 32 fixedly arranged on the outside of the steam nozzle 1, and the guide cylinder 32 is located inside the rotating drum 10, the outer wall of the guide cylinder 32 is provided with a spiral second guide groove 33, the inner wall of one of the grooves 34 is provided with a first through groove 36 corresponding to the guide cylinder 32, and the rotating shaft 37 corresponding to the first through groove 36 is provided with a spherical guide block 40 at one end close to the rotating drum 10, the guide block 40 passes through the first through groove 36 and cooperates with the second guide groove 33 for movable guidance.

[0046] like Figure 1-Figure 8 As shown, in order to increase the range of soot suction and soot blowing, a swing assembly for horizontal swing of the steam nozzle head 1 is provided at the end close to the steam nozzle head 1 and the steam pipe 3, and the swing assembly includes a second connector 14 in a circular arc shape and arranged at the end of the steam nozzle head 1 close to the steam pipe 3, and the second connector 14 is provided with a through hole connected to the steam nozzle head 1, and the end of the steam pipe 3 close to the steam nozzle head 1 is provided with a first connector 13 in a circular arc shape, and the first connector 13 is provided with a through hole connected to the steam pipe 3, and the second connector 14 is rotatably connected to the inside of one side of the first connector 13, and is a movable sealed connection to prevent leakage. In order to increase stability, an arc-shaped guide rail 26 is provided on the inner wall of the first connecting head 13, and a first guide groove 25 corresponding to the guide rail 26 is provided on the top and bottom of the second connecting head 14, and the guide rail 26 is movably guided and connected to the inner side of the first guide groove 25, and a first gear 24 corresponding to the traction main frame 17 is fixed to the bottom of the second connecting head 14, and one end of the inner side of the traction main frame 17 is evenly provided with gear teeth meshing with the first gear 24. During the rotation of the second connecting head 14, the steam nozzle 1 and the steam pipe 3 are always connected through the through holes on the first connecting head 13 and the second connecting head 14, so that the steam enters the steam nozzle 1 conveniently.

[0047] like Figure 8 , Figure 14-15 , Fig.17As shown, in order to achieve the temporary loss of ash suction effect during soot blowing, a pressure drive assembly for controlling the lifting and lowering of the latch 53 is provided on the steam nozzle 1, and the pressure drive assembly includes a pressure storage cylinder 18 arranged at the top of the steam nozzle 1 and connected to the steam nozzle 1, and a piston rod 46 is vertically and movably connected to the inner side of the pressure storage cylinder 18, and a second spring 47 is arranged between the top of the piston rod 46 and the inner top wall of the pressure storage cylinder 18, and a lifting plate 31 corresponding to the piston rod 46 and the arc plate 51 is arranged at the bottom of the steam nozzle 1, and the lifting plate 31 is located at the top of the arc plate 51, and the lower end of the piston rod 46 extends to the bottom of the steam nozzle 1 and is connected to the lifting plate 31, so that when the steam nozzle 1 is in the spraying state, the piston rod 46 drives the lifting plate 31 to rise, and when the spraying stops, the second spring 47 resets and drives the lifting plate 31 to move downward, and a fixed cylinder 52 is arranged through the arc plate 51, and the latch 53 is vertically and movably connected in the fixed cylinder 52 On the other hand, a stop block 48 is provided on the inner wall of the fixed cylinder 52, and a second through groove 58 is provided on the side wall of the latch 53 to slide with the stop block 48. A fourth spring 59 is provided between the top wall of the inner cavity of the second through groove 58 and the top of the stop block 48, and is configured so that when the fourth spring 59 is in the reset state, the lower end of the latch 53 is disengaged from the first pulling groove 20, and the top of the latch 53 slides with the bottom wall of the lifting plate 31. In order to reduce the friction, a ball bearing can be provided on the top of the latch 53, and the lifting plate 31 is used to push the latch 53 downward, so that when there is steam pressure inside the steam nozzle 1, the latch 53 can be pushed downward into the first pulling groove 20, and when the traction sub-frame 27 is displaced, the latch 53 always corresponds to the lifting plate 31 to ensure that the latch 53 is always in a pressed state. It should be noted that a vent hole with an inner diameter smaller than the diameter of the second spring 47 is provided on the top of the pressure storage cylinder 18 for ventilation when the piston rod 46 is raised or lowered.

[0048] like Fig.13 As shown, in order to facilitate the discharge of dust, an ash hole 42 for ash discharge is provided at one end of the dust collecting ring 9. In order to seal the ash hole 42 when sucking ash, a sealing assembly is provided in the ash hole 42. The sealing assembly includes a sealing cone 43 arranged on the inner side of the dust collecting ring 9 for plugging and cooperating with the ash hole 42. A guide column 45 corresponding to the sealing cone 43 is fixedly provided on one side of the interior of the dust collecting ring 9. One end of the sealing cone 43 is movably sleeved on the outer side of the guide column 45. A first spring 44 is provided between the side of the sealing cone 43 close to the guide column 45 and the inner wall of the dust collecting ring 9. When the first spring 44 is in the reset state, the sealing cone 43 and the ash hole 42 are in a tightly plugged and sealed state.

[0049] like Figure 8 , Fig.14As shown, in order to discharge the dust in the dust collecting ring 9 during soot blowing, a pusher for driving the displacement of the sealing cone 43 is provided at the bottom of the lifting plate 31, and the pusher includes an ash falling frame 30 fixed to one end of the bottom of the lifting plate 31, and a positioning pin 49 located at the bottom of the dust collecting ring 9 is vertically provided at the lower end of the ash falling frame 30, and the positioning pin 49 is used to be plugged with the inner side of the end of the sealing cone 43 away from the guide column 45. When the movable sleeve 11 is located at the end of the rotating drum 10 close to the steam pipe 3, the sealing cone 43 is just located at the top of the positioning pin 49, and is configured so that when the steam nozzle 1 is in the spraying state, the positioning pin 49 is plugged with the inner side of the end of the sealing cone 43 away from the guide column 45, and when the spraying is stopped, the positioning pin 49 is 9 is in a separated state from the sealing cone 43. It should be noted that the principles of the positioning pin 49 and the latch 53 are similar, but when the latch 53 is plugged into the first pulling groove 20, the positioning pin 49 and the sealing cone 43 are in a separated state, and when the latch 53 is separated from the first pulling groove 20, the positioning pin 49 and the sealing cone 43 are in a plugged state. Both are achieved by using the steam pressure in the steam nozzle 1. The plugging of the positioning pin 49 and the sealing cone 43 is for ash discharge during ash blowing. At the same time, the dust collecting ring 9 and the movable sleeve 11 can be positioned as a whole to prevent the movable sleeve 11 from moving outside the drum 10 during the swinging of the steam nozzle 1 for ash blowing, which will cause the subsequent latch 53 to not match the first pulling groove 20 and make it difficult to plug in.

[0050] like Figure 7-Figure 9 , Fig.13 , Figure 15-16 As shown, in order to avoid clogging of the filter plate 15, a knocking assembly for knocking the filter plate 15 is provided on the traction sub-frame 27, and the knocking assembly includes a cleaning rod 28 arranged on the side wall of the traction sub-frame 27, and the cleaning rod 28 is located on the side of the dust collecting ring 9 close to the filter plate 15, and a sliding groove 57 is provided on the side of the cleaning rod 28 close to the filter plate 15, and the sliding groove 57 is slidably connected with a floating frame 54, and a third spring 56 is provided between the side of the floating frame 54 close to the sliding groove 57 and the inner wall of the sliding groove 57, and a knocking head 55 corresponding to the filter plate 15 is provided at one end of the floating frame 54 close to the filter plate 15, and a driving block 41 corresponding to one end of the floating frame 54 is evenly provided on the circumferential side wall of the dust collecting ring 9, and the end of the driving block 41 close to the floating frame 54 is an inclined surface, and the corresponding part of the floating frame 54 and the driving block 41 is rotatably connected with a roller 50.

[0051] When in use, in the initial state, the valve 4 is in a closed state, the movable sleeve 11 is located at one end of the rotating drum 10 close to the steam pipe 3, and the sealing cone 43 is located directly above the positioning needle 49. Since there is no steam pressure in the steam nozzle 1, under the downward return force of the second spring 47, the piston rod 46 pushes the lifting plate 31 downward, and then the lifting plate 31 is located at the lowest point, the positioning needle 49 and the sealing cone 43 are not plugged in, and since the lifting plate 31 is in a downward pressing state on the latch 53, the fourth spring 59 is in a contracted state, and the lower end of the latch 53 is located inside the first pulling groove 20, and the dust suction operation can be carried out at this time. Specifically, the motor 16 drives the turntable 19 to rotate, the turntable 19 drives the pulling wheel 23 to rotate, the pulling wheel 23 drives the traction main frame 17 to move back and forth through the second pulling groove 21, and the traction main frame 17 continuously drives the first gear 24 and the steam nozzle 1 to swing horizontally as a whole through the gear teeth at one end of the inner side, and when the traction main frame 17 moves back and forth, it will drive the arc plate 51, the traction sub-frame 27, the rotating ring 12, and the movable sleeve 11 to move back and forth as a whole through the combination of the first pulling groove 20 and the latch 53. When the movable sleeve 11 moves, it will also drive the dust suction branch pipe 5, the wind cover 7, the connecting pipe 8, and the dust collecting ring 9 to move as a whole, and the rotating shaft The second gear 39 is displaced inside the groove 34. Since the pair of second gears 39 at the end of the rotating shaft 37 are respectively meshed with the pair of racks 35 inside the groove 34, and the pair of second gears 39 are fixed to the end of the rotating shaft 37 by a one-way bearing with opposite rotation directions, when the rotating shaft 37 is displaced in one direction, one of the second gears 39 on the rotating shaft 37 will not rotate relative to the rotating shaft 37 due to the meshing with the rack 35. At this time, the second gear 39 plays a role and drives the rotating shaft 37 to rotate, while the other second gear 39 will mesh with the rack 35. The second gear 39 does not work when the shaft 37 rotates relative to the shaft 37. When the shaft 37 moves in the other direction, the second gear 39 at the end of the shaft 37 drives the shaft 37 to rotate alternately, ensuring that the shaft 37 always rotates in one direction, so that the shaft 37 drives the fan blades 38 to always rotate in one direction, and then the fan blades 38 generate negative pressure in the wind cover 7. The dust suction holes 6 on the dust suction branch pipe 5 suck the dust. After the dust is sucked into the dust suction branch pipe 5, it passes through the wind cover 7 and the connecting pipe 8 and enters the dust collecting ring 9. Finally, it is blocked by the filter plate 15, and the gas is discharged. The dust is stored in the dust collecting ring 9.In addition, due to the action of the guide block 40 and the second guide groove 33, and the rotation of the drum 10 on the steam nozzle 1, the movable sleeve 11 will also drive the drum 10, the dust suction branch pipe 5, the wind cover 7, the connecting pipe 8, and the dust collecting ring 9 to rotate as a whole while moving back and forth, thereby increasing the dust suction range and effect, and the steam nozzle 1 will also drive the horizontal swing while moving back and forth and rotating, so that the dust raised around can be absorbed and removed in a larger range, and the dust collecting ring 9 will drive the driving block 41 to rotate while moving back and forth, and the traction sub-frame 27 is along the steam nozzle 1. The nozzle 1 is axially displaced, and the rotating ring 12 is rotationally connected to the movable sleeve 11, so the traction sub-frame 27 only follows the movable sleeve 11 to make linear motion, and the traction sub-frame 27 is located on the side of the dust collecting ring 9 close to the filter plate 15, so when the dust collecting ring 9 rotates, it will drive multiple driving blocks 41 to intermittently touch the roller 50. When touching, due to the inclined surface of the driving block 41, the roller 50 is pressed to drive the floating frame 54 and the knocking head 55 to compress the third spring 56 as a whole. After separation, the third spring 56 is reset, and the knocking head 55 knocks on the filter plate 15 to shake off the dust;

[0052] During soot blowing, the motor 16 is similarly controlled so that the movable sleeve 11 is located at one end of the rotating drum 10 close to the steam pipe 3. At this time, the sealing cone 43 corresponds to the positioning needle 49, the valve 4 is opened, pressure is generated in the steam nozzle 1, the piston rod 46 rises, the second spring 47 is compressed, the lifting plate 31 rises, and the positioning needle 49 is plugged into the inner side of the bottom of the sealing cone 43. After the positioning needle 49 is plugged into the sealing cone 43, it will also push the sealing cone 43 up a distance. Therefore, the sealing cone 43 moves up and compresses the first spring 44. A gap is generated between the sealing cone 43 and the ash falling hole 42. The dust in the dust collecting ring 9 can fall from the gap between the ash falling hole 42 and the sealing cone 43. In addition, the fourth spring 59 will be reset due to the rise of the lifting plate 31, and the lower end of the latch 53 will move from the first The pulling groove 20 is disengaged. At this stage, the displacement of the pulling main frame 17 will only drive the steam nozzle 1 to swing and blow soot through the cooperation of the gear teeth and the first gear 24. The swinging is also conducive to the dust falling from the ash dropping hole 42, and because the dust falling at this time is less affected by the airflow and will not be lifted up on a large scale, the movable sleeve 11 remains stationary during the soot blowing, and due to the insertion of the positioning pin 49 and the sealing cone 43, the dust collecting ring 9 and the movable sleeve 11 are positioned as a whole to prevent the movable sleeve 11 from moving outside the drum 10 when the steam nozzle 1 swings, thereby preventing the pin 53 from offsetting the first pulling groove 20, facilitating the insertion of the pin 53 and the first pulling groove 20 during subsequent soot suction, and then suctioning the soot after the soot blowing is completed. The specific soot suction method is as described above.

[0053] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A high-efficiency sootblowing device for a power plant boiler, comprising a steam pipe (3), a valve (4) arranged on the steam pipe (3), and a steam nozzle (1) arranged at one end of the steam pipe (3) for sootblowing; Features: The steam nozzle (1) is provided with an ash suction mechanism, the ash suction mechanism comprising a rotating drum (10) arranged outside the steam nozzle (1) and rotating around the axis of the steam nozzle (1), the outer wall of the rotating drum (10) is evenly provided with grooves (34), racks (35) are respectively provided on both sides of the inner cavity of the groove (34), and the two racks (35) in each groove (34) are staggered, and the outer side of the rotating drum (10) is movably connected to a movable sleeve (35) along the axial direction of the rotating drum (10). 11), an ash suction branch pipe (5) corresponding to the groove (34) is fixedly arranged on the outer side of the movable sleeve (11), an ash suction branch pipe (5) is arranged on the surface of the ash suction branch pipe (5) with ash suction holes (6), a rotating shaft (37) is rotatably connected to the inner side of the ash suction branch pipe (5), an end of the ash suction branch pipe (5) away from the movable sleeve (11) is connected to a wind shield (7), an end of the rotating shaft (37) away from the movable sleeve (11) extends to the inner side of the wind shield (7) and is provided with a fan blade (38), and the wind shield (7) A connecting pipe (8) is provided at one end away from the dust suction branch pipe (5); the end of the connecting pipe (8) away from the wind cover (7) is connected to a dust collecting ring (9) located outside the steam nozzle (1); the dust collecting ring (9) is located at one end of the dust suction branch pipe (5) close to the steam pipe (3); and an annular opening is provided at one end of the dust collecting ring (9) close to the steam pipe (3), and an annular filter plate (15) is provided inside the annular opening; the end of the rotating shaft (37) close to the movable sleeve (11) extends to the groove A pair of second gears (39) corresponding to and meshing with the rack (35) are arranged on the inner side of the rotating shaft (34); a one-way bearing is fixed on the outer wall of the corresponding part of the rotating shaft (37) and the second gear (39); the second gear (39) is fixed to the outer wall of the one-way bearing, and the pair of one-way bearings at the end of each rotating shaft (37) rotate in opposite directions; and a driving source for driving the movable sleeve (11) to move outside the rotating drum (10) is arranged at one end of the steam nozzle (1) close to the steam pipe (3).

2. A high-efficiency sootblowing device for a power plant boiler according to claim 1, characterized in that: The invention also comprises a rotating mechanism for guiding the movable sleeve (11) and the rotating drum (10) to rotate as a whole, the rotating mechanism comprising a guiding drum (32) fixedly arranged outside the steam nozzle (1), and the guiding drum (32) is located inside the rotating drum (10), the outer wall of the guiding drum (32) is provided with a second spiral guide groove (33), the inner wall of one of the grooves (34) is provided with a first through groove (36) corresponding to the guiding drum (32), and a spherical guide block (40) is provided at one end of the rotating shaft (37) corresponding to the first through groove (36) close to the rotating drum (10), and the guide block (40) passes through the first through groove (36) and cooperates with the second guide groove (33) for movable guidance.

3. A high-efficiency sootblowing device for a power plant boiler according to claim 2, characterized in that: The driving source comprises a fixed frame (2) arranged at one end of the steam pipe (3); a traction main frame (17) is horizontally movably connected to a side of the fixed frame (2) close to the steam nozzle (1); a second pulling groove (21) is arranged at one end of the traction main frame (17) close to the fixed frame (2); a rotating disk (19) is arranged at the bottom of the traction main frame (17); a pulling wheel (23) movably connected to the second pulling groove (21) is arranged at one end of the top of the rotating disk (19); and an electric motor for driving the rotating disk (19) to rotate is arranged at one end of the bottom of the fixed frame (2). The invention relates to a steam ejector (16), wherein a first pulling groove (20) is arranged at one end of the pulling main frame (17) close to the steam ejector head (1), a rotating ring (12) is rotatably connected to one end of the movable sleeve (11) close to the steam pipe (3), a pulling sub-frame (27) is fixed to the side wall of the rotating ring (12), and the pulling sub-frame (27) is displaced along the axial direction of the steam ejector head (1), and an arc plate (51) is arranged at the bottom of one end of the pulling sub-frame (27) away from the rotating ring (12), and a latch (53) plugged into the first pulling groove (20) is vertically arranged on the arc plate (51).

4. A high-efficiency sootblowing device for a power plant boiler according to claim 3, characterized in that: A guide rod (22) movably and guidingly connected to the fixing frame (2) is provided on one side of the traction main frame (17) close to the fixing frame (2).

5. The high-efficiency sootblowing device for a power plant boiler according to claim 3, characterized in that: The steam nozzle (1) and the steam pipe (3) are provided with a swinging assembly for horizontally swinging the steam nozzle (1) at the ends thereof close to each other. The swinging assembly comprises a second connecting head (14) in the shape of an arc and provided at the end of the steam nozzle (1) close to the steam pipe (3). The second connecting head (14) is provided with a through hole connected to the steam nozzle (1). The end of the steam pipe (3) close to the steam nozzle (1) is provided with a first connecting head (13) in the shape of an arc. The first connecting head (13) is provided with a through hole connected to the steam pipe (3). The second connecting head (14) is rotatably connected to the inside of one side of the first connecting head (13). A first gear (24) corresponding to the traction main frame (17) is fixed at the bottom of the second connecting head (14). One end of the inner side of the traction main frame (17) is evenly provided with gear teeth meshing with the first gear (24).

6. A high-efficiency sootblowing device for a power plant boiler according to claim 5, characterized in that: The steam nozzle (1) is provided with a pressure drive assembly for controlling the lifting and lowering of the latch (53), the pressure drive assembly comprising a pressure storage cylinder (18) arranged at the top of the steam nozzle (1) and connected to the steam nozzle (1), a piston rod (46) is vertically and movably connected to the inner side of the pressure storage cylinder (18), a second spring (47) is arranged between the top of the piston rod (46) and the inner top wall of the pressure storage cylinder (18), a lifting plate (31) corresponding to the piston rod (46) and the arc plate (51) is arranged at the bottom of the steam nozzle (1), and the lifting plate (31) is located at the top of the arc plate (51), and the lower end of the piston rod (46) extends to the bottom of the steam nozzle (1) and is connected to the lifting plate (31), so that when the steam nozzle (1) is in the spraying state, the piston rod (46) drives the lifting plate (31) to move upward. When the spraying stops, the second spring (47) resets and drives the lifting plate (31) to move downward. A fixed cylinder (52) is provided through the arc plate (51). The latch (53) is vertically movably connected to the inner side of the fixed cylinder (52). The inner wall of the fixed cylinder (52) is provided with a stop block (48). The side wall of the latch (53) is provided with a second through groove (58) slidably matched with the stop block (48). A fourth spring (59) is provided between the top wall of the inner cavity of the second through groove (58) and the top of the stop block (48). The fourth spring (59) is configured so that when the fourth spring (59) is in the reset state, the lower end of the latch (53) is disengaged from the first pulling groove (20), the top of the latch (53) is slidably matched with the bottom wall of the lifting plate (31), and the lifting plate (31) is used to push the latch (53) to move downward.

7. A high-efficiency sootblowing device for a power plant boiler according to claim 6, characterized in that: One end of the dust collecting ring (9) is provided with an ash dropping hole (42) for discharging ash, and a sealing assembly is provided in the ash dropping hole (42). The sealing assembly includes a sealing cone (43) provided on the inner side of the dust collecting ring (9) for plugging and matching with the ash dropping hole (42). A guide column (45) corresponding to the sealing cone (43) is fixedly provided on one side of the interior of the dust collecting ring (9), and one end of the sealing cone (43) is movably sleeved on the outer side of the guide column (45). A first spring (44) is provided between the side of the sealing cone (43) close to the guide column (45) and the inner wall of the dust collecting ring (9), and when the first spring (44) is in a reset state, the sealing cone (43) and the ash dropping hole (42) are in a tightly plugged state.

8. The high-efficiency sootblowing device for a power plant boiler according to claim 7, characterized in that: A pusher for driving the sealing cone (43) to move is disposed at the bottom of the lifting plate (31), and the pusher includes an ash falling frame (30) fixed to one end of the bottom of the lifting plate (31), and a positioning pin (49) located at the bottom of the dust collecting ring (9) is vertically disposed at the lower end of the ash falling frame (30), and the positioning pin (49) is used to be plugged into and matched with the inner side of one end of the sealing cone (43) away from the guide column (45); When the movable sleeve (11) is located at one end of the rotating drum (10) close to the steam pipe (3), the sealing cone (43) is just located at the top of the positioning needle (49), and is configured so that when the steam nozzle (1) is in a spraying state, the positioning needle (49) is plugged into the inner side of one end of the sealing cone (43) away from the guide column (45), and when the spraying stops, the positioning needle (49) and the sealing cone (43) are in a separated state.

9. The high-efficiency sootblowing device for a power plant boiler according to claim 3, characterized in that: The traction sub-frame (27) is provided with a knocking assembly for knocking the filter plate (15), the knocking assembly comprising a cleaning rod (28) arranged on the side wall of the traction sub-frame (27), and the cleaning rod (28) is located on a side of the dust collecting ring (9) close to the filter plate (15), and a sliding groove (57) is arranged on the side of the cleaning rod (28) close to the filter plate (15), and the sliding groove (57) is slidably connected to a floating frame (54), and the floating frame (54) close to the sliding groove (57) is provided with a sliding groove (57). A third spring (56) is arranged between one side and the inner wall of the sliding groove (57); a striking head (55) corresponding to the filter plate (15) is arranged at one end of the floating frame (54) close to the filter plate (15); a driving block (41) corresponding to one end of the floating frame (54) is evenly arranged on the circumferential side wall of the dust collecting ring (9); and one end of the driving block (41) close to the floating frame (54) is an inclined surface; and a roller (50) is rotatably connected to the corresponding portion of the floating frame (54) and the driving block (41).

10. The high-efficiency sootblowing device for a power plant boiler according to claim 6, characterized in that: The inner wall of the first connecting head (13) is provided with an arc-shaped guide rail (26), the top and bottom of the second connecting head (14) are provided with a first guide groove (25) corresponding to the guide rail (26), and the guide rail (26) is movably guided and connected to the inner side of the first guide groove (25).

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