High-pressure water soot blower convenient to adjust and control method thereof

Abstract

The invention discloses a high-pressure water soot blower convenient to adjust and a control method thereof, and particularly relates to the technical field of soot blowers.The high-pressure water soot blower convenient to adjust comprises a soot blowing box and a connecting plate and further comprises a driving part, the driving part comprises a moving box, a moving pipe is rotationally connected into the moving box, and an adjusting part comprises an adjusting head which communicates with the moving pipe; two symmetrically-arranged spray heads are rotationally connected into the adjusting head, a limiting mechanism is arranged between the adjusting head and the spray heads, when the movable pipe enters the pipe box from the outside, each spray head swings in the direction away from the movable box, and when the movable pipe moves outwards from the interior of the pipe box, each spray head swings in the direction close to the movable box. And the limiting mechanism can limit different swing positions of the spray head, soot blowing dead angles on the inner wall of the heat transfer pipe can be eliminated, and meanwhile the service life of the spray head is prolonged.

Description

Technical Field

[0001] This invention relates to the field of soot blower technology, and more specifically, to a high-pressure water soot blower that is easy to adjust and its control method. Background Technology

[0002] The core component of a tubular air preheater consists of numerous metal pipes called heat transfer tubes. These pipes are typically made of carbon steel or enamel and are used for heat exchange between flue gas and air. Multiple heat transfer tubes are combined to form a tube box, which is the basic unit of the tubular air preheater. After prolonged operation, ash accumulation on the heat transfer tubes of the air preheater forms a thermal resistance layer, leading to a decrease in the heat exchange efficiency between flue gas and air. Statistics show that for every 1mm increase in ash accumulation, the boiler thermal efficiency decreases by 2%-5%. After removing the ash by blowing away the ash, the heating surface can be restored to a clean state, reducing the exhaust gas temperature and thus improving the thermal efficiency by about 5%-10%. The improvement in heat transfer efficiency directly reduces fuel consumption and operating costs.

[0003] In existing technology, when soot blowing an air preheater, high-pressure water is used to blow soot from the heat transfer tubes inside the air preheater. A moving tube in the soot blower enters the air preheater and rotates simultaneously, driving the nozzles to blow soot from the tube box units inside the air preheater. Typically, multiple sets of nozzles spray high-pressure water at angles perpendicular to the inner surface of the tube box, cleaning the accumulated ash through the sprayed high-pressure water. However, there are dead zones for cleaning between the sidewalls of two adjacent heat transfer tubes in each set, and similar dead zones exist between the sidewalls of adjacent tube boxes in each set, reducing the cleaning effect. Furthermore, the high-pressure water jet impacts the inner wall of the nozzle at extremely high speeds, easily causing the nozzle surface to be continuously subjected to impact force, gradually forming and expanding micro-cracks, resulting in a short nozzle lifespan and requiring frequent replacement. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides an easily adjustable high-pressure water soot blower and its control method to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a high-pressure water soot blower that is easy to adjust, comprising a soot blowing box and a connecting plate for installation, and further comprising: The drive unit includes a movable box that can move within the soot blowing box, and a movable tube that is rotatably connected inside the movable box and can rotate as the movable box moves. The adjustment unit includes an adjustment head, which is connected to a moving tube. Two symmetrically arranged nozzles are rotatably connected inside the adjustment head, and a limiting mechanism is provided between the adjustment head and the nozzles. When the moving tube enters the tube box from the outside, each nozzle swings away from the moving box. When the moving tube moves outward from inside the tube box, each nozzle swings closer to the moving box. The limiting mechanism can limit the different swing positions of the nozzles.

[0006] Preferably, the connecting plate has an inlet slot, a screw is rotatably connected inside the soot blowing box, the screw is threadedly connected to the soot blowing box, a motor is provided on the top of the soot blowing box, and pulleys are coaxially provided at the output end of the motor and the end of the screw. The two pulleys are connected by a synchronous belt, and a control component is provided on the top of the soot blowing box. The control component is electrically connected to the motor.

[0007] Preferably, the screw has a keyway, a first gear is rotatably connected inside the movable box, the first gear is connected to the keyway via a connecting key, and a second gear is provided on the movable tube to mesh with the first gear.

[0008] Preferably, the soot blowing box is equipped with a high-pressure water pump, and the end of the high-pressure water pump near the moving box is connected to a transmission pipe. The transmission pipe is inserted into the moving pipe and slidably connected to it. The end of the high-pressure water pump near the side wall of the soot blowing box is connected to a water inlet pipe that penetrates the soot blowing box.

[0009] Preferably, each nozzle is connected to a guide tube, and a connecting rod is hinged to the lower end of each guide tube. The ends of two connecting rods near the moving box are fixedly connected by a sliding ring, and the sliding ring is slidably connected to the moving tube.

[0010] Preferably, the end of the sliding ring near the moving box is connected to the side wall of the moving box via a first spring, and a baffle is fixedly connected to the bottom of the soot blowing box. A passage groove is provided on the baffle, and the sliding ring can contact the baffle.

[0011] Preferably, the limiting mechanism includes two limiting posts corresponding to the connecting rods, the limiting posts being slidably connected to the corresponding connecting rods, and a second spring being fitted on the limiting post between its stepped surface and the connecting rod. The side wall of the moving tube has two limiting grooves corresponding to the limiting posts, and each limiting post can be inserted into the corresponding limiting groove.

[0012] Preferably, a push plate is fixedly connected to the end of the limiting post near the moving box, and a guide ring is fixedly connected to the end of the baffle away from the moving box. The end of the guide ring away from the moving box is an inclined surface, and the inclined surface of the guide ring can push the push plate to move in a direction away from the center of the moving tube.

[0013] Preferably, the adjusting head is provided with a connecting groove, and the adjusting head is provided with two ball grooves communicating with the connecting groove. The nozzle is rotatably connected to the corresponding ball groove. Each nozzle is provided with two water inlet grooves, and each water inlet groove is connected to a corresponding guide pipe. The guide pipe and the water inlet groove are provided with spiral blades.

[0014] A method for controlling a high-pressure water soot blower includes the following steps: S1. Based on the air preheater's condition, configure the control components to control the moving speed of the moving box; S2. After the motor starts, the moving box drives the moving tube to move toward the tube box. The moving tube drives the two nozzles to move and rotate at the same time. As the nozzles enter the tube box from the outside, the two nozzles deflect away from the moving box, which can clean the dead corners in the gap of the heat transfer tube. S3. When the moving tube moves from the tube box toward the outside, the adjustment unit controls the two nozzles to deflect toward the direction closer to the moving box, cleaning the other side of the dead corner in the gap of the heat transfer tube.

[0015] The technical effects and advantages of this invention are as follows: 1. This invention, through the coordinated arrangement of a nozzle, guide tube, connecting rod, sliding ring, first spring, guide ring, limiting post, and limiting groove, enables the nozzle to change its spray angle when entering or moving outward from the tube box. Since the spray angle of the guide tube is no longer perpendicular to the inner wall of the heat transfer tube, the high-pressure water sprayed from the guide tube can directly act between the side walls of every two adjacent heat transfer tubes, directly rinsing the original dead corners for ash blowing. At the same time, the high-pressure water sprayed from the guide tube can pass through the gaps in the heat transfer tubes and act on the side walls of adjacent tube boxes, i.e., the outer walls of the heat transfer tubes, further eliminating dead corners for ash blowing, increasing the radiation area of ​​the high-pressure water, avoiding ash residue, improving the heat exchange efficiency of the air preheater, and reducing airflow resistance.

[0016] 2. This invention utilizes the coordinated arrangement of a nozzle, guide tube, connecting groove, water inlet groove, and spiral blades. The spiral guide blades, with their special angle design, force the fluid to move along a spiral trajectory, decomposing the water flow into a main stream and an auxiliary stream. This structure can maintain 70% of the water flow in the high-pressure core area and form a protective water curtain with 30% of the water flow, reducing the impact on the inner wall of the nozzle. When the nozzle swings at different angles, the water inlet groove connected to the connecting groove inside the nozzle will switch alternately and synchronously, preventing the water inlet groove from being continuously impacted by high-pressure water. This allows the two water inlet grooves to be used alternately, effectively extending the service life of the nozzle. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 This is a full sectional front view of the present invention.

[0019] Figure 3 This is a structural diagram of the adjustment part of the present invention.

[0020] Figure 4 This is a schematic diagram of the limiting mechanism and adjusting head of the present invention.

[0021] Figure 5 This is a schematic diagram of the structure of the guide tube, nozzle, connecting rod and sliding ring of the present invention.

[0022] Figure 6 This is a schematic diagram of the structure of the adjusting head, nozzle, moving pipe, transmission pipe and high-pressure water pump of the present invention.

[0023] Figure 7 For the present invention Figure 6 A magnified view of A in the middle.

[0024] Figure 8 This is a part drawing of the helical blade of the present invention.

[0025] Figure 9 This is a schematic diagram of the structure of the pipe box and the moving pipe of the present invention.

[0026] Figure 10 This is a schematic diagram showing the direction of high-pressure water ejection when the moving tube of the present invention enters the tube box from the outside.

[0027] Figure 11 This is a schematic diagram showing the direction of high-pressure water ejection when the moving pipe of the present invention moves from inside the pipe box to the outside.

[0028] The attached figures are labeled as follows: 1. Soot blowing box; 2. Connecting plate; 201. Inlet groove; 3. Drive unit; 301. Moving box; 302. Moving tube; 303. Screw; 304. Motor; 305. Pulley; 306. Synchronous belt; 307. Control component; 308. First gear; 309. Second gear; 310. Connecting key; 4. Adjustment unit; 401. Adjustment head; 402. Nozzle; 403. Limiting mechanism; 404. 1. Limiting post; 4032. Second spring; 4033. Limiting groove; 4034. Push plate; 4035. Guide ring; 404. High-pressure water pump; 405. Transmission pipe; 406. Water inlet pipe; 407. Guide pipe; 408. Connecting rod; 409. Sliding ring; 410. First spring; 411. Baffle; 501. Connecting groove; 502. Water inlet groove; 503. Spiral blade; 6. Pipe box; 601. Heat transfer pipe. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0030] Example 1 In existing technologies, high-pressure water is typically used to clean the heat transfer tubes inside an air preheater during soot blowing. This is achieved by moving a tube and rotating a nozzle to blow soot onto the tube box units within the air preheater. However, the current nozzles spray high-pressure water at an angle perpendicular to the inner surface of the tube box. While this effectively removes accumulated ash, it has significant drawbacks. Firstly, a cleaning dead zone is created between every two adjacent heat transfer tubes. Secondly, there are also areas that are difficult to clean between the side walls of adjacent tube boxes on the left and right sides of each group. This results in ash remaining on the side walls of the heat transfer tubes, which negatively impacts the heat transfer efficiency of the air preheater. Ash accumulation not only reduces heat transfer efficiency, preventing heat from the flue gas from being effectively transferred to the air, but also narrows the flue gas passage and increases the resistance to flue gas flow.

[0031] To resolve the above technical issues, please refer to Figures 1 to 11 As shown, an easily adjustable high-pressure water soot blower includes a soot blowing box 1 and a connecting plate 2 for installation, as well as a drive unit 3 and an adjustment unit 4. The drive unit 3 includes a movable box 301, which can move within the soot blowing box 1. A movable pipe 302 is rotatably connected within the movable box 301, and the movable pipe 302 can rotate as the movable box 301 moves. The adjustment unit 4 includes an adjustment head 401, which is connected to the movable pipe 302. Two symmetrically arranged nozzles 402 are rotatably connected within the adjustment head 401. A limiting mechanism 403 is provided between the adjustment head 401 and the nozzles 402. When the movable pipe 302 enters the pipe box 6 from the outside, each nozzle 402 swings away from the movable box 301. When the movable pipe 302 moves outward from inside the pipe box 6, each nozzle 402 swings towards the movable box 301. The limiting mechanism 403 can limit the different swing positions of the nozzles 402.

[0032] The connecting plate 2 has an inlet slot 201. A screw 303 is rotatably connected inside the soot blowing box 1. The screw 303 is threadedly connected to the soot blowing box 1. A motor 304 is provided on the top of the soot blowing box 1. The output end of the motor 304 and the end of the screw 303 are both coaxially provided with pulleys 305. The two pulleys 305 are connected by a synchronous belt 306. A control component 307 is provided on the top of the soot blowing box 1. The control component 307 is electrically connected to the motor 304.

[0033] A keyway is provided on the screw 303. A first gear 308 is rotatably connected inside the movable box 301. The first gear 308 is connected to the keyway via a connecting key 310. A second gear 309 is provided on the movable tube 302, which meshes with the first gear 308. When the screw 303 rotates, it drives the first gear 308 to rotate via the keyway and the connecting key 310. The first gear 308 drives the second gear 309 and the movable tube 302 to rotate through meshing. The movable tube 302 can move and rotate with the movable box 301.

[0034] The soot blowing box 1 is equipped with a high-pressure water pump 404. One end of the high-pressure water pump 404 near the movable box 301 is connected to a transmission pipe 405. The transmission pipe 405 is inserted into the movable pipe 302 and slidably connected to it. One end of the high-pressure water pump 404 near the side wall of the soot blowing box 1 is connected to a water inlet pipe 406 that penetrates the soot blowing box 1. The water inlet pipe 406 is used to connect to a water source.

[0035] Each nozzle 402 is connected to a guide tube 407, and each guide tube 407 is hinged to a connecting rod 408 at its lower end. The two connecting rods 408 are fixedly connected at one end near the moving box 301 by a sliding ring 409, and the sliding ring 409 is slidably connected to the moving tube 302.

[0036] The end of the sliding ring 409 near the moving box 301 is connected to the side wall of the moving box 301 via the first spring 410. A baffle 411 is fixedly connected to the bottom of the soot blowing box 1. A passage groove is provided on the baffle 411, and the sliding ring 409 can contact the baffle 411. The moving tube 302 and the connecting rod 408 can pass through the groove.

[0037] The limiting mechanism 403 includes two limiting posts 4031 that correspond one-to-one with the connecting rods 408. The limiting posts 4031 are slidably connected to the corresponding connecting rods 408. The limiting posts 4031 are T-shaped. A second spring 4032 is fitted on the limiting post 4031 between its stepped surface and the connecting rod 408. Two limiting grooves 4033 that correspond one-to-one with the limiting posts 4031 are opened on the side wall of the moving tube 302. Each limiting post 4031 can be inserted into the corresponding limiting groove 4033.

[0038] A push plate 4034 is fixedly connected to one end of the limiting post 4031 near the moving box 301. The end of the push plate 4034 near the moving box 301 is an inclined surface. The length of the end of the push plate 4034 near the connecting rod 408 is greater than the length of the end away from the connecting rod 408. A guide ring 4035 is fixedly connected to one end of the baffle 411 away from the moving box 301. The end of the guide ring 4035 away from the moving box 301 is an inclined surface. The length of the outer ring of the guide ring 4035 is less than the length of its inner ring. The inclined surface of the guide ring 4035 can push the push plate 4034 to move in a direction away from the center of the moving tube 302.

[0039] In actual use, the initial state is that the first spring 410 is in a compressed state. At this time, the displacement between the sliding ring 409 and the moving box 301 is the largest. The two guide tubes 407 deflect away from the moving box 301. They are fixedly installed to the side wall of the air preheater through the connecting plate 2. The inlet groove 201 on the connecting plate 2 corresponds to each tube box 6 unit. The control component 307 is set according to the ash accumulation inside the air preheater to regulate the feed speed of the moving tube 302. When the motor 304 rotates, the motor 304 drives the pulley 305 to rotate. The pulley 305 drives the screw 303 to rotate via the synchronous belt 306. Since the screw 303 is threadedly connected to the movable box 301, the movable box 301 moves towards the connecting plate 2, i.e., the tube box 6, inside the soot blowing box 1. The movable box 301 drives the movable tube 302, the first gear 308, and the second gear 309 to move towards the tube box 6. At the same time, the screw 303 drives the first gear 308 to rotate via the keyway and the connecting key 310. After the first gear 308 and the second gear 309 mesh, the movable tube 302 moves towards the tube box 6 and rotates at the same time.

[0040] The water source is connected to an external water source through the inlet pipe 406. The water source enters the high-pressure water pump 404 through the inlet pipe 406. The water is pressurized by the high-pressure water pump 404 to form high-pressure water. The high-pressure water enters the transmission pipe 405. The transmission pipe 405 is a fixed part and does not participate in the movement. The high-pressure water in the transmission pipe 405 enters the moving pipe 302, so that the moving pipe 302 has a continuous supply of high-pressure water during its movement and rotation. The high-pressure water in the moving pipe 302 is sprayed out through two nozzles 402 and the guide pipe 407. While the moving pipe 302 moves, it also drives the nozzles 402 and the guide pipe 407 to rotate, thus rinsing the heat transfer pipe 601 in the pipe box 6.

[0041] When the moving tube 302 begins to move towards the tube box 6, due to the constraint of the first spring 410, there is no relative displacement between the sliding ring 409 and the moving tube 302. The sliding ring 409 and the moving tube 302 move synchronously with the moving box 301 towards the tube box 6, so that the two connecting rods 408 do not move relative to the moving tube 302. The swing angle of the two nozzles 402 is limited by the first spring 410. That is, when the moving tube 302 drives the two nozzles 402 to move towards the tube box 6, the nozzles 402 swing in a direction away from the moving box 301. Figure 10As shown, two guide pipes 407 are used to flush the sidewalls of the heat transfer tubes 601 inside the tube box 6 at this angle. Since the spray angle of the guide pipes 407 is no longer perpendicular to the inner wall of the heat transfer tubes 601, the high-pressure water sprayed from the guide pipes 407 can directly act between the sidewalls of every two adjacent heat transfer tubes 601, directly flushing the original dead corners. At the same time, the high-pressure water sprayed from the guide pipes 407 can pass through the gaps of the heat transfer tubes 601 and act on the sidewalls of the adjacent tube box 6, that is, the outer wall of the heat transfer tubes 601, further eliminating the dead corners of soot blowing, increasing the radiation area of ​​the high-pressure water, avoiding the residue of ash accumulation, improving the heat exchange efficiency of the air preheater, and reducing the resistance of air flow.

[0042] When the moving tube 302 moves towards the tube box 6 and approaches its limit position, the moving box 301, driven by the first spring 410, causes the sliding ring 409 to contact the baffle 411. As the moving box 301 continues to move towards the tube box 6, the sliding ring 409 no longer moves with the moving tube 302. The sliding ring 409 moves relative to the moving tube 302, causing the first spring 410 to be compressed. The sliding ring 409 drives the two connecting rods 408 to move relative to the moving tube 302 towards the moving box 301. The two moving rods drive the guide tube 407 and the nozzle 402 to rotate, causing the nozzle 402 to drive the guide tube 407 to swing towards the moving box 301. When the moving box 301 drives the moving tube 302 to move towards the tube box 6, the sliding ring 409 no longer moves with the moving tube 302. When the moving tube 302 moves to its limit position relative to the tube box 6, the sliding ring 409 moves to its maximum position relative to the moving tube 302. The sliding ring 409 then drives the connecting rod 408 to move to its maximum position relative to the moving tube 302. At this time, the connecting rod 408 drives the limiting post 4031 to move to the corresponding limiting groove 4033. Under the force of the second spring 4032, the limiting post 4031 inserts into the corresponding limiting groove 4033. The position of the connecting rod 408 relative to the moving tube 302 is then limited. As the control component 307 drives the motor 304 to rotate in the opposite direction, the moving box 301 moves away from the tube box 6. The moving box 301 then drives the moving tube 302 to move closer to the soot blowing box 1. Figure 11 As shown, the two nozzles 402 drive the guide tube 407 to rotate and move simultaneously, so as to Figure 11 The heat transfer tube 601 is blown with soot at the middle angle, and the other gap end face of the heat transfer tube 601 is also blown with soot. The guide tube 407 is adjusted by moving the moving tube 302 to the limit position, thereby eliminating the dead angle of soot blowing in the tube box 6 from multiple angles.

[0043] When the connecting rod 408 moves the limiting post 4031 and the push plate 4034 to contact the inclined surface of the guide ring 4035, the inclined surface of the guide ring 4035 will push the push plate 4034 to move away from the center of the moving tube 302, so that the end of the limiting post 4031 moves out of the limiting groove 4033, releasing the limitation on the connecting rod 408. At this time, the sliding ring 409 and the two connecting rods 408 are reset under the action of the first spring 410, so that the connecting rod 408 drives the guide tube 407 and the nozzle 402 to rotate to the initial position, ensuring the spray angle of the nozzle 402 when it enters the tube box 6 next time. At this time, the water inlet 502 in the nozzle 402 is switched synchronously.

[0044] Example 2 Based on the above embodiments, during the operation of the high-pressure soot blower, the high-pressure water pump continuously supplies high-pressure water. This high-pressure water continuously impacts the nozzle, and the high-pressure water jet violently strikes the inner wall of the nozzle at extremely high speed. Under this long-term and high-intensity impact, the surface of the nozzle material is continuously subjected to the dual effects of shear force and impact force. Over time, micro-cracks gradually appear on the surface of the material. These micro-cracks continue to expand under the continuous external force, resulting in a significant reduction in the service life of the nozzle. Due to the poor durability of the nozzle, it needs to be replaced frequently in actual use, which not only increases maintenance costs but also affects the normal operating efficiency of the equipment to a certain extent.

[0045] Please see Figures 1 to 11 As shown, the adjusting head 401 has a connecting groove 501, which is T-shaped. One end of the connecting groove 501 is connected to the moving tube 302, and the other two ends of the connecting groove 501 are connected to the nozzle 402 respectively. The adjusting head 401 has two ball grooves connected to the connecting groove 501. The nozzle 402 is rotatably connected to the corresponding ball groove. Each nozzle 402 has two water inlet grooves 502. Each water inlet groove 502 is connected to the corresponding guide tube 407. The guide tube 407 and the water inlet groove 502 are equipped with spiral blades 503.

[0046] Based on the above embodiment, the high-pressure water in the moving pipe 302 will enter the connecting groove 501 in the regulating head 401. The high-pressure water enters one of the water inlet grooves 502 of the two nozzles 402 through the connecting groove 501. Since the water inlet groove 502 is equipped with a spiral blade 503, the spiral guide vane is designed with a special angle to force the fluid to move along the spiral trajectory, decomposing the water flow into the main flow and auxiliary flow. This structure can maintain 70% of the water flow in the high-pressure core area and form a protective water curtain with 30% of the water flow, reducing the impact on the inner wall of the nozzle 402.

[0047] Since each nozzle 402 has two water inlet grooves 502, and as can be seen from the above embodiments, the nozzle 402 can change its swing angle as the moving pipe 302 moves to a special position, such as... Figure 7 As shown, at this time, the two nozzles 402 swing at an angle that allows them to enter the pipe box 6. One of the water inlet channels 502 inside the nozzle 402 is blocked by the side wall of the adjusting head 401. After the high-pressure water enters the connecting groove 501, it can only enter the nozzle 402 through one of the water inlet channels 502. Due to the diversion effect of the spiral blades 503, the high-pressure water has less impact on the side wall of the water inlet channel 502 after entering the water inlet channel 502. When the moving pipe 302 moves from inside the pipe box 6 towards the soot blowing box 1, as mentioned above, the nozzle 402 will change its swing angle. At this time, because the nozzle 402 drives the two water inlet channels 502 to rotate, the water inlet channel 502 that was originally connected to the connecting groove 501 rotates to the side wall of the adjusting head 401 and is no longer connected to the connecting groove 501. The connecting groove 501 is connected, while the water inlet groove 502, which was not originally connected to the connecting groove 501, rotates to a position where it is connected to the water inlet groove 502. When the angle of the nozzle 402 swings, the water inlet groove 502 connected to the connecting groove 501 inside the nozzle 402 will switch alternately in sync, avoiding the continuous impact of high-pressure water on the water inlet groove 502. This allows the two water inlet grooves 502 to be used alternately, which can effectively extend the service life. At the same time, since the guide tube 407 and the water inlet groove 502 are equipped with spiral blades 503, the fluid is forced to move along the spiral trajectory, decomposing the water flow into the main flow and the auxiliary flow. A portion of the auxiliary water flow forms a protective water curtain, further weakening the impact of high-pressure water on the inner wall of the nozzle 402, thereby extending the service life of the nozzle 402.

[0048] Example 3 This embodiment provides a control method for a high-pressure water soot blower, including the following steps: S1. Based on the condition of the air preheater, the control component 307 is configured to control the moving speed of the moving box 301. S2. After the motor 304 starts, the moving box 301 drives the moving tube 302 to move toward the tube box 6. The moving tube 302 drives the two nozzles 402 to move and rotate at the same time. As the nozzles 402 enter the tube box 6 from the outside, the two nozzles 402 deflect in the direction away from the moving box 301, which can clean the dead corners in the gap of the heat transfer tube 601. S3. When the moving tube 302 moves from the tube box 6 toward the outside, the adjusting unit 4 controls the two nozzles 402 to deflect toward the direction close to the moving box 301, and cleans the other side of the dead corner in the gap of the heat transfer tube 601.

[0049] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An easily adjustable high-pressure water soot blower, comprising a soot blowing box (1) and a connecting plate (2) for installation, characterized in that, Also includes: The drive unit (3) includes a movable box (301) that can move inside the soot blowing box (1). A movable tube (302) is rotatably connected inside the movable box (301) and can rotate as the movable box (301) moves. Adjustment unit (4), the adjustment unit (4) includes adjustment head (401), the adjustment head (401) is connected to moving tube (302), two symmetrically arranged nozzles (402) are rotatably connected inside the adjustment head (401), and a limiting mechanism (403) is provided between the adjustment head (401) and the nozzles (402). When the moving tube (302) enters the tube box (6) from the outside, each nozzle (402) swings away from the moving box (301). When the moving tube (302) moves outward from the inside of the tube box (6), each nozzle (402) swings towards the moving box (301). The limiting mechanism (403) can limit the different swing positions of the nozzles (402).

2. The easily adjustable high-pressure water soot blower according to claim 1, characterized in that, The connecting plate (2) has an inlet groove (201). A screw (303) is rotatably connected inside the soot blowing box (1). The screw (303) is threadedly connected to the soot blowing box (1). A motor (304) is provided on the top of the soot blowing box (1). The output end of the motor (304) and the end of the screw (303) are both coaxially provided with pulleys (305). The two pulleys (305) are connected by a synchronous belt (306). A control component (307) is provided on the top of the soot blowing box (1). The control component (307) is electrically connected to the motor (304).

3. The easily adjustable high-pressure water soot blower according to claim 2, characterized in that, The screw (303) has a keyway, and the movable box (301) is rotatably connected to a first gear (308). The first gear (308) is connected to the keyway via a connecting key (310). The movable tube (302) is provided with a second gear (309) that meshes with the first gear (308).

4. The easily adjustable high-pressure water soot blower according to claim 3, characterized in that, The soot blowing box (1) is equipped with a high-pressure water pump (404). The end of the high-pressure water pump (404) near the movable box (301) is connected to a transmission pipe (405). The transmission pipe (405) is inserted into the movable pipe (302) and slidably connected to it. The end of the high-pressure water pump (404) near the side wall of the soot blowing box (1) is connected to a water inlet pipe (406) that penetrates the soot blowing box (1).

5. The easily adjustable high-pressure water soot blower according to claim 4, characterized in that, Each of the nozzles (402) is connected to a guide tube (407), and each guide tube (407) is hinged to a connecting rod (408) at its lower end. The two connecting rods (408) are fixedly connected at one end near the moving box (301) by a sliding ring (409), and the sliding ring (409) is slidably connected to the moving tube (302).

6. The easily adjustable high-pressure water soot blower according to claim 5, characterized in that, The sliding ring (409) is connected to the side wall of the moving box (301) at one end near the moving box (301) via a first spring (410). A baffle (411) is fixedly connected to the bottom of the soot blowing box (1). A through groove is provided on the baffle (411), and the sliding ring (409) can contact the baffle (411).

7. The easily adjustable high-pressure water soot blower according to claim 6, characterized in that, The limiting mechanism (403) includes two limiting posts (4031) corresponding to the connecting rods (408). The limiting posts (4031) are slidably connected to the corresponding connecting rods (408). A second spring (4032) is fitted on the limiting post (4031) between its stepped surface and the connecting rod (408). Two limiting grooves (4033) corresponding to the limiting posts (4031) are opened on the side wall of the moving tube (302). Each limiting post (4031) can be inserted into the corresponding limiting groove (4033).

8. The easily adjustable high-pressure water soot blower according to claim 7, characterized in that, The end of the limiting post (4031) near the moving box (301) is fixedly connected to a push plate (4034), and the end of the baffle (411) away from the moving box (301) is fixedly connected to a guide ring (4035). The end of the guide ring (4035) away from the moving box (301) is an inclined surface. The inclined surface of the guide ring (4035) can push the push plate (4034) to move in a direction away from the center of the moving tube (302).

9. The easily adjustable high-pressure water soot blower according to claim 8, characterized in that, The adjusting head (401) is provided with a connecting groove (501), and the adjusting head (401) is provided with two ball grooves that communicate with the connecting groove (501). The nozzle (402) is rotatably connected to the corresponding ball groove. Each nozzle (402) is provided with two water inlet grooves (502). Each water inlet groove (502) is connected to the corresponding guide pipe (407). The guide pipe (407) and the water inlet groove (502) are provided with spiral blades (503).

10. A method for controlling a sootblower applied to an easily adjustable high-pressure water sootblower as described in claims 1-9, characterized in that, The control method includes the following steps: S1. Based on the condition of the air preheater, the control component (307) is configured to control the moving speed of the moving box (301); S2. After the motor (304) is started, the moving box (301) drives the moving tube (302) to move toward the tube box (6). The moving tube (302) drives the two nozzles (402) to move and rotate at the same time. During the process of the nozzles (402) entering the tube box (6) from the outside, the two nozzles (402) deflect away from the moving box (301), which can clean the dead corners in the gap of the heat transfer tube (601). S3. When the moving tube (302) moves from the tube box (6) toward the outside, the adjustment unit (4) controls the two nozzles (402) to deflect toward the direction close to the moving box (301) to clean the other side of the dead corner in the gap of the heat transfer tube (601).

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