Pretreatment device for ash removal of boiler of thermal power plant

Abstract

The invention discloses a pretreatment device for thermal power plant boiler ash removal, and particularly relates to the technical field of thermal power plant boiler cleaning, the pretreatment device comprises a bearing cross bar and a boiler water cooling wall, the top of the bearing cross bar is fixedly provided with a liquid conveying pipe, and the front side of the top of a horizontal frame is symmetrically provided with auxiliary permeation mechanisms left and right; and a hammering part is fixed between the two mounting frames, first guide rods are symmetrically arranged on the left portion and the right portion of the horizontal frame in a sliding mode, and an arc-shaped hollow scraper knife is jointly fixed to the lower portions of the two first guide rods. According to the pretreatment device for ash removal of the thermal power plant boiler, ash attached to the inner wall of the boiler is pretreated through the ash removing agent, the ash removing agent is injected while cleaning is conducted, the ash can be decomposed and loosened, the adhesion force between the ash and the inner wall of the boiler is reduced, the ash can be separated from the inner wall of the boiler, and the ash removal efficiency is improved. Subsequent cleaning work is facilitated, and the pretreatment efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of boiler cleaning in thermal power plants, in particular to a pretreatment device for removing ash from boilers in thermal power plants. Background Art

[0002] A thermal power plant is a plant that uses combustibles (such as coal) as fuel to produce electricity. Its basic production process is: when the fuel is burned, it heats water to generate steam, converting the chemical energy of the fuel into thermal energy. The steam pressure drives the turbine to rotate, converting the thermal energy into mechanical energy. The turbine then drives the generator to rotate, converting the mechanical energy into electrical energy.

[0003] Fuel is usually burned in a boiler; The inner wall of the boiler used in thermal power plants is attached with a large number of water pipes. During the combustion of fuel, the water inside the water pipes will absorb the heat generated by the combustion of fuel. However, the combustion of fuel will produce soot, which will adhere to the water pipes. Over time, the soot will become thicker and thicker, which will greatly hinder the heat transfer. Therefore, the water pipes on the inner wall of the boiler need to be cleaned regularly.

[0004] Chinese patent document CN218328201U discloses a pretreatment device for ash removal of a thermal power plant boiler, which includes a fixing unit, a supporting unit and a processing unit. The above patent document sets a pretreatment device at the furnace well mouth of the boiler, which is connected to the furnace well mouth through a fixing unit. The supporting unit on the fixing unit is used for moving and installing the processing unit, and the processing unit is used for pretreatment before the furnace ash scale treatment. However, the patent document still has the following defects in the implementation process: During the implementation process, the above patent document can only operate on the boiler intersection, but cannot operate on the inside of the boiler. It can be seen from the actual situation that the boilers used in thermal power plants are generally very large, their internal space is also very large, and their vertical height is also very high. Therefore, when the soot cleaning agent is injected into the boiler furnace mouth, it takes a long time for the soot cleaning agent to reach the bottom of the boiler, and its working efficiency needs to be improved. Summary of the invention

[0005] The main purpose of the present invention is to provide a pretreatment device for ash removal of thermal power plant boilers, which can effectively solve the problem that when the ash cleaning agent is injected into the boiler furnace, it takes a long time for the ash cleaning agent to reach the bottom of the boiler and its working efficiency needs to be improved.

[0006] To achieve the above object, the technical solution adopted by the present invention is: A pretreatment device for ash removal of boilers in thermal power plants comprises a supporting crossbar and a boiler water-cooled wall, a liquid infusion pipe is fixed on the top of the supporting crossbar, a horizontal frame is fixed on the front side of the supporting crossbar, an auxiliary penetration mechanism is symmetrically installed on the front side of the top of the horizontal frame, two mounting frames are installed on the outside of the horizontal frame, a hammer part is fixed between the two mounting frames, a guide rod 1 is symmetrically slid on the left and right parts of the horizontal frame, an arc-shaped hollow scraper is commonly fixed on the lower part of the two guide rods, the lower part of the hammer part is connected to the arc-shaped hollow scraper, counterweights are installed on the left and right parts of the lower end of the supporting crossbar, lifting rings are installed on the left and right sides of the top of the horizontal frame, and limiting rings are fixed on the upper parts of the outer surfaces of the two guide rods.

[0007] Preferably, the auxiliary permeation mechanism includes two vertical plates fixed on one side of the top of the horizontal frame, a rotating wheel and a speed increasing mechanism are provided between the opposite surfaces of the two vertical plates, the two sides of the rotating wheel are respectively installed on the inner side of the vertical plate and the output end of the speed increasing mechanism, a rubber wheel is rotated at the end of the vertical plate away from the speed increasing mechanism, the axis of the rubber wheel passes through the vertical plate on the same side and is fixedly connected to the input end of the speed increasing mechanism, the rubber wheel is in contact with the outer surface of the boiler water-cooled wall, a plurality of elastic metal sheets are installed in a ring array on the outer surface of the rotating wheel, and a steel ball is installed on the side of each elastic metal sheet away from the rotating wheel.

[0008] Preferably, the arc-shaped inner surface of the arc-shaped hollow scraper is provided with a plurality of liquid outlet holes which are all inclined downward.

[0009] Preferably, the hammering part includes a liquid storage shell fixed between two mounting frames, a liquid storage rubber bag is fixed on the top of the liquid storage shell, a piston is slidably provided in the inner cavity of the liquid storage shell, a spring is fixed between the piston and the top wall of the inner cavity of the liquid storage shell, a push rod is fixed to the lower end of the piston and extends to the outside through the liquid storage shell, a water guiding device is fixed to the left side of the lower end of the liquid storage shell, a limiting mechanism 2 and a limiting mechanism 3 are fixed on the right side between the two mounting frames, the limiting mechanism 2 is located on the upper part of the limiting mechanism 3, a slide groove is provided on the upper right part of the outer surface of the liquid storage shell, and the output side of one of the branches of the infusion tube is fixed to the right side of the lower end of the liquid storage shell.

[0010] Preferably, a liquid outlet pipe and a liquid inlet pipe communicating with the inner cavity of the liquid storage rubber bag are respectively fixed on the left and right sides of the liquid storage rubber bag.

[0011] Preferably, the second limiting mechanism includes a second support plate and a second extrusion rod, the second support plate is fixed at the upper right side between the two mounting frames, the liquid inlet pipe is located between the second extrusion rod and the second support plate, and push rods three and springs two are fixed on both sides of the second extrusion rod from the inside to the outside, the lower ends of the two second springs are fixedly connected to the second support plate, the two push rods three pass through the second support plate to extend to the lower part and are jointly fixed with a connecting rod two, and the connecting rod two passes through the same side slide groove and extends to the inner cavity of the liquid storage shell.

[0012] Preferably, the limiting mechanism three includes a top plate one fixed to the right side between the two mounting frames, two guide rods one are fixed to one end of the top plate one close to the liquid storage shell, a magnetic plate one is slidably mounted on the outer surfaces of the two guide rods one, a wedge block one is fixed to one end of the magnetic plate one close to the liquid storage shell, a wedge block two matching with the wedge block one is fixed to the vertical part of the outer surface of the connecting rod two, the outer surfaces of the two guide rods one are located between the magnetic plate one and the top plate one and slide with the magnetic plate two, and the outer surfaces of the two guide rods one are located between the magnetic plate two and the top plate one and are sleeved with springs four; The first magnetic plate and the second magnetic plate are both magnetic and have the same magnetic properties.

[0013] Preferably, the water guiding device includes a water guiding pipe, the upper and lower ends of the water guiding pipe are respectively fixed to the upper end of the arc-shaped hollow scraper and the lower end of the liquid storage shell, and the inner cavity of the water guiding pipe is communicated with the inner cavity of the liquid storage shell and the inner cavity of the arc-shaped hollow scraper, the lower end of the liquid outlet pipe is fixedly connected to the water guiding pipe and the inner cavities of the two are communicated, a fixing mechanism is installed on the side of the outer surface of the water guiding pipe close to the push rod, a delayed liquid outlet mechanism is fixed to the upper part of the inner cavity of the water guiding pipe, and the middle part of the inner cavity of the water guiding pipe is made of soft material.

[0014] Preferably, the fixing mechanism comprises two elastic clamps fixed to the outer surface of the water pipe, and limiting grooves are provided at the lower parts of the two elastic clamps on the sides close to each other.

[0015] Preferably, the delayed liquid discharge mechanism comprises a guide rod 2, the upper portion of the outer surface of the guide rod 2 is provided with a lower plate and a fixed plate sliding on the outer surface of the guide rod 2, and an upper plate fixed to the outer surface of the guide rod 2, the upper plate is located between the fixed plate and the lower plate, a plurality of connecting rods 3 are fixed to the outer surface of the fixed plate, the plurality of connecting rods 3 are all fixed to the inner surface of the water pipe, the outer surface of the lower plate is also fixed to the inner surface of the water pipe, an L-shaped plate is fixed to the lower end of the guide rod 2, a limit block matching with the two upper plates is rotatably provided at the upper end of the vertical part of the L-shaped plate, and a spring 3 is fixed between the upper plate and the fixed plate; A sealing ring is fixed on the outer side of the upper end of the lower plate, a plurality of water grooves are opened on the outer side of the lower plate, and a plurality of water holes are opened on the inner side of the upper plate.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. In the implementation process of the present invention, the soot attached to the inner wall of the boiler is pre-treated by using a soot remover, which can decompose and loosen the soot, reduce the adhesion between the soot and the inner wall of the boiler, so that it can be separated from the inner wall of the boiler, and facilitate subsequent cleaning work. In addition, the device used in this case can be used to shovel the inner wall of the boiler from the boiler mouth to the bottom of the boiler, while cleaning and injecting the soot remover, shortening the penetration time of the soot remover and improving the pretreatment efficiency.

[0017] In the present invention, the power generated by the arc-shaped hollow scraper during the flow of the soot remover is used to scrape away the soot attached to the local inner wall of the boiler, exposing the cleaning surface to facilitate the soot remover to enter the gap between the soot and the inner wall of the boiler, thereby improving the decomposition effect of the soot remover and further improving the pretreatment effect of the soot remover.

[0018] During the descent of the device, the present invention can synchronously drive the auxiliary penetration mechanism to operate and knock on the inner wall of the boiler, which can not only loosen the ash that has not been scraped off, but also accelerate the penetration effect of the ash remover in the ash gaps through the vibration force generated during the knocking process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of another viewing angle of the overall structure of the present invention; Figure 3 It is a schematic diagram of another viewing angle of the overall structure of the present invention; Figure 4 For the present invention Figure 3 The enlarged schematic diagram at A in the middle; Figure 5 It is a partial schematic diagram of the present invention; Figure 6 It is a partial cross-sectional schematic diagram of the overall structure of the hammering part of the present invention; Figure 7 For the present invention Figure 6 The enlarged schematic diagram at C in the middle; Figure 8 For the present invention Figure 6 The enlarged schematic diagram at D in the middle; Fig. 9 For the present invention Figure 8 The enlarged schematic diagram at E in the middle; Fig.10 It is a schematic diagram of the overall structure of the delayed liquid discharge mechanism of the present invention; Fig.11 It is a schematic diagram of the overall structure of the auxiliary penetration mechanism of the present invention.

[0020] In the figure: 1, supporting cross bar; 2, infusion tube; 3, counterweight; 4, horizontal frame; 5, auxiliary penetration mechanism; 51, rubber wheel; 52, vertical plate 1; 53, speed increasing mechanism; 54, rotating wheel; 55, elastic metal sheet; 56, steel ball; 6, mounting frame; 7, hammering part; 71, liquid storage shell; 72, piston; 73, push rod 1; 74, water guide device; 741, water guide tube; 742, fixing mechanism; 7421, limit groove; 7422, elastic splint; 743, delayed liquid discharge mechanism; 7431, upper plate; 7432, lower plate; 7433, sealing ring; 7434, guide rod 2; 7435, L-shaped plate; 7436, limit block; 74 37. Spring three; 7438. Fixed plate; 7439. Connecting rod three; 75. Liquid storage rubber bag; 751. Liquid outlet pipe; 752. Liquid inlet pipe; 77. Limiting mechanism two; 771. Support plate two; 772. Push rod three; 773. Spring two; 774. Connecting rod two; 775. Extrusion rod two; 78. Limiting mechanism three; 781. Top plate one; 782. Guide rod one; 783. Magnetic plate one; 784. Wedge block one; 785. Wedge block two; 786. Spring four; 787. Magnetic plate two; 79. Spring one; 70. Slide; 8. Arc-shaped hollow scraper; 81. Liquid outlet hole; 9. Guide rod one; 10. Boiler water-cooled wall; 11. Limiting ring. DETAILED DESCRIPTION

[0021] 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.

[0022] Embodiment 1, as Figure 1 - Figure 4 As shown, a pretreatment device for ash removal of a boiler in a thermal power plant comprises a supporting horizontal bar 1 and a boiler water-cooled wall 10, a liquid infusion pipe 2 is fixed on the top of the supporting horizontal bar 1, a horizontal frame 4 is fixed on the front side of the supporting horizontal bar 1, an auxiliary penetration mechanism 5 is symmetrically installed on the front side of the top of the horizontal frame 4, two mounting frames 6 are installed on the outside of the horizontal frame 4, a hammering part 7 is fixed between the two mounting frames 6, a guide rod 9 is symmetrically slid on the left and right parts of the horizontal frame 4, an arc-shaped hollow scraper 8 is commonly fixed on the lower parts of the two guide rods 9, and the lower part of the hammering part 7 is connected to the arc-shaped hollow scraper 8, a counterweight 3 is installed on the left and right parts of the lower end of the supporting horizontal bar 1, a lifting ring is installed on the left and right sides of the top of the horizontal frame 4, and a limit ring 11 is fixed on the upper part of the outer surface of the two guide rods 9; The boiler water-cooled wall 10 in this case is a pipe installed on the inner wall of the boiler in a thermal power plant. Water flows in the inner cavity of the boiler water-cooled wall 10, which can absorb the heat generated by the combustion of coal, etc. The boiler water-cooled wall 10 is only used for demonstration in this case and does not participate in the actual cleaning process. The boiler water-cooled wall 10 is the object to be cleaned.

[0023] The horizontal frame 4, the auxiliary penetration mechanism 5, the hammering part 7 and the arc-shaped hollow scraper 8 in this case are only part of the whole device. Figure 2 The overall structure shown is composed of a plurality of components, and the specific number thereof can be designed according to the actual usage scenario.

[0024] During the implementation of this case, a soot remover is used to assist the device in treating soot. The soot remover can use the existing technology: Soot Clean Plus soot dissipation treatment agent, model BF5006.

[0025] In this case, two lifting rings are installed on the horizontal frame 4. During the implementation process, the gravity distribution on the front and rear sides of the horizontal frame 4 is uneven, which makes the center of gravity of the device move backward. Therefore, during the implementation process, after the supporting cross bar 1 is close to the boiler water-cooled wall 10, under the action of the two counterweights 3, the arc-shaped hollow scraper 8 will be tightly attached to the surface of the boiler water-cooled wall 10, and then the soot remover that can soften and adsorb on the surface of the boiler water-cooled wall 10 is injected into the hammer part 7 through the infusion tube 2. The soot remover is injected into the inner cavity of the arc-shaped hollow scraper 8 through the infusion tube 2 and flows out to the surface of the boiler water-cooled wall 10. The soot remover is injected into the soot through the capillary holes between the soot, so that it can be softened, reducing the adsorption force between the soot and the boiler water-cooled wall 10, pre-treating the soot, and facilitating the subsequent removal of the soot.

[0026] During the implementation process, the arc-shaped hollow scraper 8 can, with the assistance of the hammer part 7, scrape out a channel on the surface of the boiler water-cooled wall 10, so that the soot remover can penetrate into the gap between the soot and the boiler water-cooled wall 10 more quickly.

[0027] The above-mentioned middle limiting ring 11 can limit the horizontal projection distance between the horizontal frame 4 and the arc-shaped hollow scraper 8, and can be adjusted according to the actual use scenario; In addition, during the implementation of the device, the auxiliary penetration mechanism 5 can be operated synchronously to knock the surface of the boiler water-cooled wall 10, thereby expanding the gap between the soot and the surface of the boiler water-cooled wall 10 through vibration force, thereby improving the penetration efficiency of the soot remover.

[0028] For further information, see Figure 2 and Figure 5 In this embodiment, the arc-shaped inner surface of the arc-shaped hollow scraper 8 is provided with a plurality of liquid outlet holes 81 which are all inclined downward.

[0029] In this case, the plurality of liquid outlet holes 81 are opened at an angle in order to change the contact angle between the soot remover and the surface of the boiler water-cooled wall 10; It can be seen from the actual situation that the angle between water and the object it contacts during the spraying process determines the range of water splashing outward. The smaller the angle, the smaller the splashing range. Therefore, in this case, several liquid outlets 81 are all set at an angle to reduce the spraying angle between the soot remover and the boiler water-cooled wall 10, thereby reducing the splashing area of ​​the soot remover, allowing the soot remover to penetrate as much as possible from the contact surface between the soot and the boiler water-cooled wall 10 to reduce waste.

[0030] Embodiment 2: Based on Embodiment 1, the hammering part 7 is optimized in this embodiment, so that the hammering part 7 can further improve the cleaning effect of the arc-shaped hollow scraper 8 on the soot on the surface of the boiler water-cooled wall 10 .

[0031] Specifically, in order to achieve the above purpose, refer to Figure 6 - Fig.11 In this case, the hammering part 7 includes a liquid storage shell 71 fixed between two mounting frames 6, a liquid storage rubber bag 75 is fixed on the top of the liquid storage shell 71, a piston 72 is slidably arranged in the inner cavity of the liquid storage shell 71, a spring 79 is fixed between the piston 72 and the inner cavity top wall of the liquid storage shell 71, a push rod 73 is fixed at the lower end of the piston 72 and extends to the outside through the liquid storage shell 71, a water guide device 74 is fixed to the left side of the lower end of the liquid storage shell 71, a limiting mechanism 2 77 and a limiting mechanism 3 78 are fixed on the right side between the two mounting frames 6, the limiting mechanism 2 77 is located on the upper part of the limiting mechanism 3 78, a slide groove 70 is provided on the upper right part of the outer surface of the liquid storage shell 71, and the output side of one of the branches of the infusion tube 2 is fixed to the right side of the lower end of the liquid storage shell 71; Depend on Figure 6 Combination Figure 2 It can be seen that the infusion tube 2 is composed of a straight tube and a number of branch tubes; Use an external liquid lifting device to inject the ash remover into the inner cavity of the liquid storage shell 71 through the liquid infusion tube 2, and lift the piston 72. At this time, the water guide device 74 is in a closed state. During the process of the piston 72 being lifted, the position of the push rod 1 73 is also lifted synchronously, and the spring 1 79 is gradually compressed to generate elastic force, and the ash remover is temporarily stored in the inner cavity of the liquid storage shell 71; When the piston 72 is lifted, the water guide device 74, the second limiting mechanism 77 and the third limiting mechanism 78 are also driven to operate synchronously; The above process is divided into two stages: 1. The first stage: during the upward movement of the piston 72, the second limit mechanism 77 is driven to operate and release the restriction on the liquid inlet pipe 752, so that the soot remover can flow through the inner cavity of the liquid inlet pipe 752 and finally flow into the water guide device 74 through the liquid storage rubber bag 75 and the liquid outlet pipe 751; 2. Second stage: the piston 72 continues to move upward, driving the limiting mechanism 3 78 to operate, gradually closing the branch of the infusion tube 2 and driving the water guide device 74 to operate and lock itself, so that the ash remover no longer flows through the lower inner cavity of the branch of the infusion tube 2, and the ash remover in the upper inner cavity of the infusion tube 2 all flows into the inner cavity of the liquid storage rubber bag 75 through the liquid inlet pipe 752; 3. The third stage: after the soot remover in the inner cavity of the liquid storage shell 71 leaves quickly, the push rod 1 73 will impact the arc hollow scraper 8, which can improve the cleaning effect of the cutting edge of the arc hollow scraper 8 on the soot attached to the outer surface of the boiler water-cooled wall 10.

[0032] The fourth stage: when the piston 72 moves to the lowermost part, the limiting mechanism 2 77 first re-closes the liquid inlet pipe 752, and the limiting mechanism 3 78 gradually releases the sealing effect on the branch of the infusion tube 2, and the piston 72 re-drives the water guiding device 74 to continue to close the lower end of the liquid storage shell 71, so that the liquid storage shell 71 can continue to store liquid and accumulate force again for the next impact with the arc-shaped hollow scraper 8.

[0033] A liquid outlet pipe 751 and a liquid inlet pipe 752 communicating with the inner cavity of the liquid storage rubber bag 75 are respectively fixed on the left and right sides of the liquid storage rubber bag 75; In order to drain the soot remover, the liquid outlet pipe 751 and the liquid inlet pipe 752 do not need to shut down the external liquid lifting equipment, so that the soot remover can continue to flow; Secondly, during the implementation process, the liquid storage rubber bag 75 can buffer the sudden increase in liquid flow rate due to its own expansion and contraction characteristics, thereby reducing the flow rate of the soot remover.

[0034] Specifically, in order to achieve the technical effects of the second and third stages above, refer to Figure 6 - Figure 8 In this embodiment, the limiting mechanism 2 77 includes a support plate 2 771 and an extrusion rod 2 775. The support plate 2 771 is fixed to the upper right side between the two mounting frames 6. The liquid inlet pipe 752 is located between the extrusion rod 2 775 and the support plate 2 771. Push rods 3 772 and springs 2 773 are fixed on both sides of the extrusion rod 2 775 from the inside to the outside. The lower ends of the two springs 2 773 are fixedly connected to the support plate 2 771. The two push rods 3 772 penetrate the support plate 2 771 and extend to the lower part and are commonly fixed with a connecting rod 2 774. The connecting rod 2 774 penetrates the same side slide groove 70 and extends to the inner cavity of the liquid storage shell 71. In the above, when the piston 72 moves upward to contact the connecting rod 2 774, the vertical height of the connecting rod 2 774 can be raised, and the squeezing rod 2 775 can be pushed upward, so that the connecting rod 2 774 releases the restraining effect on the liquid inlet pipe 752, so that the ash remover can flow in the inner cavity of the liquid inlet pipe 752. During this process, the two springs 2 773 are stretched. Conversely, after the piston 72 moves downward, the two springs 2 773 will stretch the squeezing rod 2 775 to the initial position again, so that the squeezing rod 2 775 will close and restrain the liquid inlet pipe 752 again.

[0035] Specifically, in order to cooperate with the operation of the limiting mechanism 2 77 to close the branch of the infusion tube 2, refer to Figure 7 In this embodiment, the limiting mechanism three 78 includes a top plate 781 fixed on the right side between the two mounting frames 6, two guide rods 782 are fixed to one end of the top plate 781 close to the liquid storage shell 71, and a magnetic plate 783 is slid together on the outer surfaces of the two guide rods 782, and a wedge block 784 is fixed to one end of the magnetic plate 783 close to the liquid storage shell 71, and a wedge block 785 matching the wedge block 784 is fixed to the vertical part of the outer surface of the connecting rod 2 774, and a magnetic plate 787 is slid between the magnetic plate 783 and the top plate 781 on the outer surfaces of the two guide rods 782, and a spring 786 is sleeved on the outer surfaces of the two guide rods 782 between the magnetic plate 787 and the top plate 781; For further information, see Figure 7 In this embodiment, magnetic plate 1 783 and magnetic plate 2 787 are both magnetic and have the same magnetic properties.

[0036] In the above, when the second squeezing rod 775 releases the restriction on the liquid inlet pipe 752, the inner cavity of the liquid inlet pipe 752 can flow the ash remover, and at this time the piston 72 continues to move upward, driving the second wedge block 785 to push the wedge block 1 784 to move outward. Since the magnetic plate 1 783 and the second magnetic plate 787 have the same magnetic properties, the two will repel each other, so that the magnetic plate 1 783 can push the second magnetic plate 787 to move, and the two springs 4 786 are compressed to generate elastic force. In this process, the lower part of the branch of the infusion pipe 2 is gradually completely closed, so that the ash remover can flow from the inner cavity of the liquid inlet pipe 752. On the contrary, after the connecting rod 2 774 moves downward, the wedge block 2 785 moves downward first, and the magnetic plate 1 783 and the magnetic plate 2 787 move inward under the action of the spring 4 786, and the extrusion rod 2 775 squeezes and closes the liquid inlet pipe 752 again under the pulling force of the spring 2 773. In this process, the contact area between the wedge block 2 785 and the wedge block 1 784 gradually increases, and under the action of the spring 4 786, the guide rod 1 782 and the magnetic plate 1 783 gradually move inward, and the distance between the two also gradually increases, dynamically converting the flow path of the ash remover from the inner cavity of the liquid inlet pipe 752 to the lower part of the branch of the infusion pipe 2.

[0037] It can be seen from this that the maximum elastic force that can be generated by the two springs 4 786 is smaller than the maximum repulsive force between the magnetic plate 1 783 and the magnetic plate 2 787.

[0038] Embodiment 3: Based on embodiment 2, this embodiment quickly releases the soot remover stored in the inner cavity of the liquid storage shell 71 , and the auxiliary push rod 1 73 impacts the arc-shaped hollow scraper 8 .

[0039] Specifically, to achieve the above purpose, refer to Figure 8 - Fig.10 In this embodiment, the water guide device 74 includes a water guide pipe 741, the upper and lower ends of the water guide pipe 741 are respectively fixed to the upper end of the arc-shaped hollow scraper 8 and the lower end of the liquid storage shell 71, and the inner cavity of the water guide pipe 741 is communicated with the inner cavity of the liquid storage shell 71 and the inner cavity of the arc-shaped hollow scraper 8. The lower end of the liquid outlet pipe 751 is fixedly connected to the water guide pipe 741 and the inner cavities of the two are communicated. The middle part of the inner cavity of the water guide pipe 741 is made of soft material; In the above, the liquid storage shell 71 is connected to the arc-shaped hollow scraper 8, so that the soot remover stored in the inner cavity of the liquid storage shell 71 can be released into the inner cavity of the arc-shaped hollow scraper 8, and flows to the outer surface of the boiler water-cooled wall 10 through the arc-shaped hollow scraper 8.

[0040] For further information, see Figure 8 - Fig.10 In this embodiment, a fixing mechanism 742 is installed on the side of the outer surface of the water pipe 741 close to the push rod 1 73, and the fixing mechanism 742 includes two elastic clamping plates 7422 fixed on the outer surface of the water pipe 741, and the lower part of the side where the two elastic clamping plates 7422 are close to each other is provided with a limiting groove 7421; For further information, see Figure 8 and Fig.10 In this embodiment, a delayed liquid discharge mechanism 743 is fixed to the upper part of the inner cavity of the water guide pipe 741. The delayed liquid discharge mechanism 743 includes a second guide rod 7434. The upper part of the outer surface of the second guide rod 7434 is provided with a lower plate 7432 and a fixed plate 7438 sliding on the outer surface of the second guide rod 7434, and an upper plate 7431 fixed to the outer surface of the second guide rod 7434. The upper plate 7431 is located between the fixed plate 7438 and the lower plate 7432. The outer surface of the fixed plate 7438 A plurality of connecting rods 7439 are fixed on the surface, and the plurality of connecting rods 7439 are fixed on the inner surface of the water pipe 741. The outer surface of the lower plate 7432 is also fixed on the inner surface of the water pipe 741. An L-shaped plate 7435 is fixed on the lower end of the guide rod 2 7434. A limit block 7436 that cooperates with the two upper plates 7431 is rotated on the upper end of the vertical part of the L-shaped plate 7435. A spring 7437 is fixed between the upper plate 7431 and the fixed plate 7438. A sealing ring 7433 is fixed to the outer side of the upper end of the lower plate 7432 , a plurality of water grooves are opened on the outer side of the lower plate 7432 , and a plurality of water holes are opened on the inner side of the upper plate 7431 .

[0041] Depend on Figure 8 It can be seen that the bottom of the push rod 1 73 is disc-shaped, which can increase the contact area between the push rod 1 73 and the L-shaped plate 7435 during implementation, making it easier to push the guide rod 2 7434 and the like to move; In the above, when the soot remover is gradually injected into the inner cavity of the liquid storage shell 71, the piston 72 is lifted up and drives the push rod 1 73 to move upward. When the piston 72 gradually moves to the highest point, the push rod 1 73 contacts the L-shaped plate 7435 and drags the L-shaped plate 7435 to move synchronously. During this process, the upper plate 7431 is separated from the sealing ring 7433, and the soot remover stored in the inner cavity of the liquid storage shell 71 flows out through a plurality of water grooves and water holes. Since the speed at which the soot remover in the inner cavity of the liquid infusion tube 2 is injected into the inner cavity of the liquid storage shell 71 is greater than the speed at which the soot remover flows out of the inner cavity of the water guide tube 741, the upper plate 7431 will gradually move upwards during this process. When the limit block 7436 is inserted into the inner cavity of the two limit grooves 7421, the elastic clamping plate 7422 tightly clamps the limit block 7436 to prevent it from falling off, and the distance between the upper plate 7431 and the lower plate 7432 is pulled to the maximum, reducing the resistance of the soot remover to the push rod 1 73 when flowing in the inner cavity of the water guide pipe 741, so that the push rod 1 73 can normally hammer the arc hollow scraper 8. When the piston 72 rises to the top, the branch pipe of the infusion pipe 2 and the liquid inlet pipe 752 complete the switching process under the action of the limit mechanism 2 77 and the limit mechanism 3 78, the limit block 7436 is locked, and the flow direction of the soot remover changes; When the distance between the upper plate 7431 and the lower plate 7432 is pulled to the maximum, the push rod 73 is released instantly, hitting the upper part of the arc-shaped hollow scraper 8, so that the arc-shaped hollow scraper 8 can scrape off the soot attached to the surface of the boiler water-cooled wall 10, thereby improving the cleaning effect; After the piston 72 returns to its initial position, the piston 72 will push the guide rod 2 7434 to move, so that the limit block 7436 is separated from the elastic clamp 7422, and the upper plate 7431 and the sealing ring 7433 are used to block the lower plate 7432 again, and the branch pipe of the infusion tube 2 and the liquid inlet pipe 752 are switched again to store energy for the push rod 1 73 again.

[0042] Embodiment 4: Based on Embodiment 3, this embodiment improves the penetration effect of the soot remover in the soot by synchronous operation of the auxiliary penetration mechanism 5.

[0043] Specifically, in order to achieve the above technical effects, refer to Fig.11In this embodiment, the auxiliary permeation mechanism 5 includes two vertical plates 52 fixed on one side of the top of the horizontal frame 4, and a rotating wheel 54 and a speed increasing mechanism 53 are arranged between the opposite surfaces of the two vertical plates 52. The two sides of the rotating wheel 54 are respectively installed on the inner side of the vertical plate 52 and the output end of the speed increasing mechanism 53. A rubber wheel 51 is rotated at one end of the vertical plate 52 away from the speed increasing mechanism 53. The axis of the rubber wheel 51 passes through the vertical plate 52 on the same side and is fixedly connected to the input end of the speed increasing mechanism 53. The rubber wheel 51 is in contact with the outer surface of the boiler water-cooled wall 10. A plurality of elastic metal sheets 55 are installed in a ring array on the outer surface of the rotating wheel 54, and a steel ball 56 is installed on the side of each elastic metal sheet 55 away from the rotating wheel 54.

[0044] In the above, when the arc-shaped hollow scraper 8 is in contact with the surface of the boiler water-cooled wall 10, the rubber wheel 51 will also be in contact with the surface of the boiler water-cooled wall 10. During the downward movement of the supporting cross bar 1, the rubber wheel 51 will rotate, and after being accelerated by the speed-increasing mechanism 53, it will drive a number of elastic metal sheets 55 and steel balls 56 to rotate. By knocking the surface of the boiler water-cooled wall 10 with a number of steel balls 56, not only can the soot that has not been scraped off be loosened, but also the vibration force generated during the knocking process can accelerate the penetration effect of the soot remover in the soot gaps.

[0045] 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 to the above embodiments. 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, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A pretreatment device for removing ash from a boiler in a thermal power plant, comprising a supporting horizontal bar (1) and a boiler water-cooled wall (10), characterized in that: An infusion tube (2) is fixed to the top of the supporting crossbar (1), a horizontal frame (4) is fixed to the front side of the supporting crossbar (1), an auxiliary penetration mechanism (5) is symmetrically installed on the left and right sides of the top front side of the horizontal frame (4), two mounting frames (6) are installed on the outside of the horizontal frame (4), a hammering part (7) is fixed between the two mounting frames (6), a guide rod (9) is symmetrically slidable on the left and right sides of the horizontal frame (4), an arc-shaped hollow scraper (8) is commonly fixed to the lower parts of the two guide rods (9), and the lower part of the hammering part (7) is connected to the arc-shaped hollow scraper (8), a counterweight (3) is installed on the left and right sides of the lower end of the supporting crossbar (1), a lifting ring is installed on the left and right sides of the top of the horizontal frame (4), and a limiting ring (11) is fixed to the upper part of the outer surface of the two guide rods (9).

2. A pretreatment device for ash removal of a thermal power plant boiler according to claim 1, characterized in that: The auxiliary permeation mechanism (5) comprises two vertical plates (52) fixed on one side of the top of the horizontal frame (4); a rotating wheel (54) and a speed increasing mechanism (53) are arranged between the opposite surfaces of the two vertical plates (52); the two sides of the rotating wheel (54) are respectively mounted on the inner side of the vertical plate (52) and the output end of the speed increasing mechanism (53); a rubber wheel (51) is rotatably arranged at one end of the vertical plate (52) away from the speed increasing mechanism (53); the axis of the rubber wheel (51) passes through the vertical plate (52) on the same side and is fixedly connected to the input end of the speed increasing mechanism (53); the rubber wheel (51) is in contact with the outer surface of the boiler water-cooled wall (10); a plurality of elastic metal sheets (55) are mounted in a ring array on the outer surface of the rotating wheel (54); a steel ball (56) is mounted on the side of each elastic metal sheet (55) away from the rotating wheel (54).

3. A pretreatment device for ash removal of a thermal power plant boiler according to claim 1, characterized in that: The arc-shaped inner surface of the arc-shaped hollow scraper (8) is provided with a plurality of liquid outlet holes (81) which are all inclined downward.

4. A pretreatment device for ash removal of a thermal power plant boiler according to claim 1, characterized in that: The hammering part (7) comprises a liquid storage shell (71) fixed between two mounting frames (6), a liquid storage rubber bag (75) is fixed on the top of the liquid storage shell (71), a piston (72) is slidably arranged in the inner cavity of the liquid storage shell (71), a spring (79) is fixed between the piston (72) and the inner cavity top wall of the liquid storage shell (71), a push rod (73) is fixed at the lower end of the piston (72) and extends to the outside through the liquid storage shell (71), a water guide device (74) is fixed on the left side of the lower end of the liquid storage shell (71), a limiting mechanism (77) and a limiting mechanism (78) are fixed on the right side between the two mounting frames (6), the limiting mechanism (77) is located on the upper part of the limiting mechanism (78), a slide groove (70) is provided on the upper right side of the outer surface of the liquid storage shell (71), and the output side of one branch of the infusion tube (2) is fixed on the right side of the lower end of the liquid storage shell (71).

5. A pretreatment device for ash removal of a thermal power plant boiler according to claim 4, characterized in that: A liquid outlet pipe (751) and a liquid inlet pipe (752) communicating with the inner cavity of the liquid storage rubber bag (75) are respectively fixed on the left and right sides of the liquid storage rubber bag (75).

6. A pretreatment device for ash removal of a thermal power plant boiler according to claim 4, characterized in that: The second limiting mechanism (77) includes a second support plate (771) and a second extrusion rod (775). The second support plate (771) is fixed to the upper right side between the two mounting frames (6). The liquid inlet pipe (752) is located between the second extrusion rod (775) and the second support plate (771). Push rods (772) and springs (773) are fixed to both sides of the second extrusion rod (775) from the inside to the outside. The lower ends of the two springs (773) are fixedly connected to the second support plate (771). The two push rods (772) penetrate the second support plate (771) and extend to the lower part and are commonly fixed with a second connecting rod (774). The second connecting rod (774) penetrates the same side slide groove (70) and extends to the inner cavity of the liquid storage shell (71).

7. A pretreatment device for ash removal of a thermal power plant boiler according to claim 6, characterized in that: The limiting mechanism three (78) comprises a top plate one (781) fixed on the right side between the two mounting frames (6), two guide rods one (782) are fixed to one end of the top plate one (781) close to the liquid storage shell (71), a magnetic plate one (783) is slidably mounted on the outer surfaces of the two guide rods one (782), a wedge block one (784) is fixed to one end of the magnetic plate one (783) close to the liquid storage shell (71), a wedge block two (785) matched with the wedge block one (784) is fixed to the vertical part of the outer surface of the connecting rod two (774), a magnetic plate two (787) is slidably mounted on the outer surfaces of the two guide rods one (782) between the magnetic plate one (783) and the top plate one (781), and springs four (786) are sleeved on the outer surfaces of the two guide rods one (782) between the magnetic plate two (787) and the top plate one (781); The magnetic plate 1 (783) and the magnetic plate 2 (787) are both magnetic and have the same magnetic properties.

8. The pretreatment device for ash removal of a thermal power plant boiler according to claim 1, characterized in that: The water guide device (74) comprises a water guide pipe (741), the upper and lower ends of the water guide pipe (741) are respectively fixed to the upper end of the arc-shaped hollow scraper (8) and the lower end of the liquid storage shell (71), and the inner cavity of the water guide pipe (741) is communicated with the inner cavity of the liquid storage shell (71) and the inner cavity of the arc-shaped hollow scraper (8). The lower end of the liquid outlet pipe (751) is fixedly connected to the water guide pipe (741), and the inner cavities of the two are communicated. A fixing mechanism (742) is installed on the side of the outer surface of the water guide pipe (741) close to the push rod (73), and a delayed liquid outlet mechanism (743) is fixed to the upper part of the inner cavity of the water guide pipe (741). The middle part of the inner cavity of the water guide pipe (741) is made of soft material.

9. A pretreatment device for ash removal of a thermal power plant boiler according to claim 8, characterized in that: The fixing mechanism (742) comprises two elastic clamping plates (7422) fixed on the outer surface of the water pipe (741), and a limiting groove (7421) is provided at the lower part of the side where the two elastic clamping plates (7422) are close to each other.

10. A pretreatment device for ash removal of a thermal power plant boiler according to claim 9, characterized in that: The delayed liquid discharge mechanism (743) comprises a second guide rod (7434), the upper portion of the outer surface of the second guide rod (7434) is provided with a lower plate (7432) and a fixed plate (7438) sliding on the outer surface of the second guide rod (7434), and an upper plate (7431) fixed on the outer surface of the second guide rod (7434), the upper plate (7431) is located between the fixed plate (7438) and the lower plate (7432), and the outer surface of the fixed plate (7438) is fixed with a plurality of third connecting rods (7439) , the plurality of connecting rods three (7439) are all fixed on the inner surface of the water pipe (741), the outer surface of the lower plate (7432) is also fixed on the inner surface of the water pipe (741), the lower end of the guide rod two (7434) is fixed with an L-shaped plate (7435), the upper end of the vertical part of the L-shaped plate (7435) is rotatably provided with a limit block (7436) matched with the two upper plates (7431), and a spring three (7437) is fixed between the upper plate (7431) and the fixed plate (7438); A sealing ring (7433) is fixed to the outer side of the upper end of the lower plate (7432), a plurality of water grooves are opened on the outer side of the lower plate (7432), and a plurality of water holes are opened on the inner side of the upper plate (7431).

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