Boiler bottom ash coking crusher

Abstract

The utility model relates to a boiler bottom ash coking crusher which comprises a base arranged outside a boiler, a track frame rotationally connected with the base and a crushing device capable of sliding on the track frame, and the crushing device comprises a drill rod extending into a coke poking hole of the boiler. The boiler comprises a base, a drill rod arranged on the base, a drill bit arranged on the drill rod and used for crushing ash, and a driving component for driving the drill rod to rotate, the base is arranged outside the boiler, a rotatable track frame is arranged on the base, the angle of the track frame can be adjusted, and the drill bit is driven by the driving component to rotate to crush the coking ash. And crushed ash is conveyed through the ash dryer, so that the ash coke removal speed and efficiency at the bottom of the boiler are improved, the ash coke at the bottom of the boiler is prevented from being deteriorated to block a slag well, the operation efficiency of the boiler is effectively improved, the labor force of workers is liberated, and the safety risk of field operation personnel and the potential safety hazard of boiler operation are completely eradicated.

Description

Technical Field

[0001] This utility model belongs to the field of boiler technology, and specifically relates to a boiler bottom ash and slag coking crusher. Background Technology

[0002] Due to rising market coal prices in recent years, thermal power plants have been blending coal to reduce production and operating costs, adding large quantities of low-priced, low-quality coal, such as high-sulfur coal, to the boilers. However, this lowers the melting point of the fly ash produced during combustion. The low-melting-point fly ash adheres to the heating surfaces of the furnace, and large clumps of sintered ash and coke fall into the narrow slag pit due to soot blowing and other reasons. Instead of reaching the working area of ​​the hydraulic slag squeeze gate, the ash cannot be crushed by the hydraulic slag squeeze gate, and cannot be cleaned and transported away in time, resulting in clumps and blockages. Over time, slag wells become completely blocked, reducing air leakage below the furnace and causing the flame to shift downwards. The accumulated ash and slag in the slag well hardens and hardens under high temperatures, exacerbating the difficulty of slag blockage treatment. If not addressed promptly, excessive accumulation of sintered slag inside the furnace affects boiler safety, necessitating an emergency shutdown and waiting for the furnace temperature to drop to acceptable levels before a professional blasting team can handle the situation. However, this process severely damages equipment at the lower heating surfaces of the boiler, creating a serious hazard for future boiler tube rupture. Such accidents have occurred repeatedly in several thermal power plants in China, causing significant economic losses and negative social impact. The root cause is that in the initial stages of slag blockage, the hard ash and slag accumulated above the hydraulic slag extrusion gate cannot be crushed and is not promptly removed by the dry slag machine. This leads to a gradual accumulation of ash and slag, eventually causing the slag well to be completely sealed off, resulting in a serious boiler safety accident.

[0003] The inventor's known method of handling ash is to manually break and clean the ash from the top of the ash dryer by using simple equipment such as long iron pipes and pneumatic picks. However, this method is labor-intensive, has high on-site safety risks, and is slow in terms of efficiency and speed. Often, the delay in the best handling time causes the ash to harden after cooling, making it difficult to clean quickly. This leads to the accumulation of ash and sintered ash, which further blocks the ash well. Ultimately, the only solution is to reduce the amount of fuel in the boiler, reduce the load on the unit, or even shut down the unit, which can cause the accident to escalate.

[0004] Therefore, providing a boiler bottom ash and slag coking crusher to improve the speed and efficiency of bottom ash and slag coking removal, prevent the bottom ash and slag coking from worsening and clogging the slag well, effectively improve boiler operating efficiency, free up workers' labor, and eliminate safety risks to on-site operators and boiler operating safety hazards is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides a boiler bottom ash and slag coking crusher, which improves the speed and efficiency of bottom ash and slag coking removal, prevents bottom ash and slag coking from worsening and clogging the slag well, effectively improves boiler operating efficiency, frees up workers' labor, and eliminates safety risks and potential hazards to boiler operation for on-site personnel.

[0006] To achieve the above objectives, this utility model provides the following solution:

[0007] A boiler bottom ash and slag coking crusher includes a base disposed outside the boiler, a track frame rotatably connected to the base, and a crushing device that can slide on the track frame. The crushing device includes a drill rod extending into a coking hole of the boiler, a drill bit disposed on the drill rod for crushing ash and slag, and a drive component for driving the drill rod to rotate.

[0008] Preferably, a screw is provided on the track frame along the axial direction of the drill rod, a sliding base is slidably fitted on the screw, the driving component is fixedly mounted on the sliding base, and a drive motor for driving the screw to rotate is provided on the track frame.

[0009] Preferably, the base is provided with a rotating shaft, and the area of ​​the track frame near the end is disposed on the rotating shaft.

[0010] Preferably, the base and the track frame are connected by a ball joint structure.

[0011] Preferably, a fixing device is provided at one end of the track frame away from the base. The fixing device includes a connecting rod provided on the track frame and hooks provided at both ends of the connecting rod for engaging with the lower outer edge of the scorch hole.

[0012] Preferably, the end of the track frame away from the hook is provided with a handle for gripping.

[0013] Preferably, the connecting rod is equipped with a water spray gun in the same axial direction as the drill rod.

[0014] Preferably, the water outlet of the water gun is provided with an atomizing nozzle.

[0015] Preferably, the track frame is provided with a transparent baffle to prevent ash and slag from splashing, and the transparent baffle is provided with an insertion hole for the drill rod to pass through.

[0016] Preferably, the driving component includes a mining electric drill motor and a reducer connected to the output shaft of the electric drill motor, wherein the output shaft of the reducer is connected to the drill rod in a transmission connection.

[0017] The present invention achieves the following technical advantages over the prior art:

[0018] By installing a base on the outside of the boiler and a rotatable track frame on the base, the track frame can be adjusted in angle to extend into the coking hole. The movement of the crushing device on the track frame aligns it with the ash and slag to be crushed. The drive component drives the drill bit to rotate, thus crushing the coking ash and slag. The crushed ash and slag is then transported by a dry slag machine. This improves the speed and efficiency of removing coking ash and slag from the bottom of the boiler, prevents the coking ash and slag from worsening and clogging the slag well, effectively improves the boiler's operating efficiency, frees up workers' labor, and eliminates safety risks and potential hazards to on-site personnel and boiler operation. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Appendix Figure 1 This is a side view schematic diagram of the boiler bottom ash and slag coking crusher and boiler bottom dry slag machine disclosed in the embodiments of this utility model;

[0021] Appendix Figure 2 This is a schematic diagram of the overall structure of the boiler bottom ash and slag coking crusher disclosed in the embodiments of this utility model;

[0022] Appendix Figure 3 This is a schematic diagram of crushing coke ash residue in the prior art;

[0023] Appendix Figure 4 This is a schematic diagram of a boiler bottom ash and slag crusher crushing coking ash and slag as disclosed in an embodiment of this utility model.

[0024] Among them, 1. Slag well; 2. Hydraulic slag squeezing gate; 3. Coke slag removal hole; 4. Dry slag machine; 5. Track frame; 6. Rotary shaft; 7. Sliding base; 8. Electric drill motor for mining; 9. Drill rod; 10. Transparent baffle; 11. Hook; 12. Water spray gun; 13. Base; 14. Water supply equipment; 15. Connecting rod. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] The purpose of this utility model is to provide a boiler bottom ash and slag coking crusher, which improves the speed and efficiency of bottom ash and slag coking removal, avoids the deterioration of bottom ash and slag coking and blockage of the slag well, effectively improves boiler operating efficiency, frees up workers' labor, and eliminates safety risks and boiler operating safety hazards for on-site operators.

[0027] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] refer to Figure 1 and Figure 2 The boiler bottom ash slag coking crusher disclosed in this utility model embodiment includes at least a base 13 set outside the boiler, a track frame 5 rotatably connected to the base 13, and a crushing device for crushing ash slag slidably set on the track frame 5. The crushing device includes a drill rod 9 extending into the coking hole 3 of the boiler, a drill bit set on the drill rod 9 for crushing ash slag, and a driving component for driving the drill rod 9 to drive the drill bit to rotate.

[0029] In this embodiment, when ash falls into the slag well 1 with a narrow opening but does not reach the working area of ​​the hydraulic slag squeezing gate 2, and cannot be crushed by the hydraulic slag squeezing gate 2, a base 13 is set outside the boiler, and a rotatable track frame 5 is set on the base 13. The track frame 5 can be adjusted in angle to extend into the coking hole 3. By moving the crushing device on the track frame 5, it is aligned with the ash that needs to be crushed. The drive component drives the drill bit to rotate to crush the coking ash. The crushed ash is then transported by the dry slag machine 4, thereby improving the speed and efficiency of removing coking ash from the furnace bottom, preventing the coking ash from worsening and clogging the slag well 1, effectively improving the boiler operating efficiency, freeing up workers' labor, and eliminating safety risks and boiler operation hazards for on-site operators.

[0030] It should be noted that the drill bit and drill rod 9 are detachable. The drill rod 9 is a high-strength threaded drill rod commonly used in mining. The diameter of the drill rod 9 can be selected as a solid rock drill rod of φ50-100mm as needed, and the length can be selected as a multi-model threaded rod of 5-8 meters as needed. The drill bit can also be selected as needed.

[0031] The base 13 is made of angle steel and is 1700mm long, 800mm wide and 1200mm high. The track frame 5 is 1500mm long and 400mm wide.

[0032] refer to Figure 2 and Figure 4In one embodiment, a screw is arranged parallel to the axial direction of the drill rod 9 on the track frame 5. A sliding base 7 is slidably fitted on the screw. The driving component is fixed on the sliding base 7. A drive motor for driving the screw to rotate is provided on the track frame 5. When the drive motor drives the screw to rotate, the rotational motion of the screw is converted into the sliding of the sliding base 7 on the screw, thereby realizing the movement of the driving component on the track frame 5, so that the drill rod 9 can drive the drill bit to approach or move away from the coking hole 3.

[0033] It should be noted that the drive motor is started and stopped by the control system to realize the start and stop of the sliding base 7 at a specified position on the track frame 5. The control system for starting and stopping the motor is existing technology and will not be described in detail here.

[0034] In one embodiment, a guide rail is provided on the track frame 5, and a slider that cooperates with the guide rail is provided on the guide rail. A hydraulic cylinder or a pneumatic cylinder is provided on the vertical end face of the slider and the guide rail. The movement of the slider on the track frame 5 is achieved by the movement of the piston inside the hydraulic cylinder or pneumatic cylinder.

[0035] refer to Figure 2 and Figure 4 In one implementation, a rotating shaft 6 is provided on the base 13, and the area of ​​the track frame 5 near the end is set on the rotating shaft 6. Specifically, the rotating shaft 6 is set at the end of the base 13 away from the drill rod 9. By setting the rotating shaft 6, the angle of the track frame 5 on the base 13 can be adjusted up and down, which facilitates the adjustment of the angle of the drill rod 9 in the coking hole 3.

[0036] In one implementation, the bottom surface of the track frame 5 near the drill rod 9 is provided with two or more abutment grooves, and the base 13 is provided with an abutment rod that cooperates with the abutment groove. The abutment rod is hinged to the base 13. When the track frame 5 is adjusted to a preset angle, the angle of the track frame 5 is fixed by abutting the abutment rod with the abutment groove on the track frame 5. The ash and slag can be crushed without the need for manual holding of the track frame 5.

[0037] refer to Figure 2 and Figure 4 In a preferred embodiment, the base 13 and the track frame 5 are connected by a ball joint structure. By setting the ball joint structure, the angle of the track frame 5 can be adjusted in multiple directions.

[0038] In one embodiment, a sphere is provided on the track frame 5, and a spherical shell that mates with the sphere is provided on the base 13. A limiting component is also provided between the spherical shell and the sphere to limit the sphere. The limiting component can be used to achieve locking and limiting of the sphere and the shell by adjusting the friction between the sphere and the shell, or it can be used to provide a through hole on the shell and limit the sphere by using a pin that mates with the through hole.

[0039] refer to Figure 2 and Figure 4 As one implementation method, a connecting rod 15 is provided at one end of the track frame 5 away from the base 13. The two ends of the connecting rod 15 are provided with hooks 11 for overlapping the lower outer edge of the coke hole 3. The hooks 11 can be used to overlap and fix the track frame 5 with the coke hole 3, so that the track frame 5 has a force point when crushing ash and slag, which is convenient for the operator.

[0040] As one implementation method, the lower part of the base 13 is provided with movable rollers, and the rollers are provided with locking components. When the base 13 needs to be moved, the base 13 can be moved by the rollers provided at the bottom of the base 13. After the angle of the track frame 5 is adjusted, the base 13 moves to the appropriate position and the rollers are locked by the locking components to avoid the problem of the base 13 moving during the ash crushing process.

[0041] refer to Figure 2 and Figure 4 In one embodiment, the end of the track frame 5 away from the hook 11 is provided with a handle for gripping, which facilitates the operator's control of the track frame 5.

[0042] refer to Figure 2 and Figure 4 In one embodiment, a water spray gun 12 is provided on the connecting rod 15 in the same axial direction as the drill rod 9, that is, the water spray gun 12 is arranged parallel to the axis of the drill rod 9. By setting the water spray gun 12, the drill rod 9 and the drill bit can be cooled by spraying water during the crushing of ash and slag, so as to ensure that the rigidity of the drill rod 9 and the drill bit is not affected by the high temperature of ash and slag and the high speed of friction heat.

[0043] refer to Figure 2 and Figure 4 As one implementation method, the water outlet of the water gun 12 is provided with an atomizing nozzle, and the water inlet of the water gun 12 is connected to the water supply device 14. By setting the atomizing nozzle, the liquid sprayed by the water gun 12 can be atomized, thereby improving the cooling effect of the drill rod 9 and the drill bit.

[0044] It should be noted that the water spray gun 12 extends into the coke hole 3, and its extension length is less than the extension length of the drill bit. That is, the extension position of the water spray gun 12 is between the coke hole 3 and the drill bit. The water supply device 14 can be the water supply tank of the crusher itself, or it can be the on-site tap water pipe or fire pipe, as long as it can provide a water source for the water spray gun.

[0045] refer to Figure 2 and Figure 4As one implementation method, a transparent baffle 10 is provided on the track frame 5 to prevent ash and slag from splashing. The transparent baffle 10 is provided with an insertion hole for the drill rod 9 to pass through. The transparent baffle 10 can facilitate the operator's observation and prevent ash and slag from splashing onto the operator's position.

[0046] It should be noted that the transparent baffle 10 is tilted towards the position close to the coke hole 3, and its tilt angle ranges from 0 degrees to 90 degrees, which can effectively prevent the splashing of ash and slag. The transparent baffle 10 is set at the position of the track frame 5 close to the hook 11. When the hook 11 is engaged with the lower outer edge 3 of the coke hole, the transparent baffle 10 can completely cover the coke hole 3.

[0047] The transparent baffle 10 is made of acrylic sheet, but it can also be made of other materials, as long as it allows operators to observe the equipment and prevents dust and debris from splashing.

[0048] refer to Figure 2 and Figure 4 In one implementation, the driving component includes a mining electric drill motor 8 and a reducer connected to the output shaft of the electric drill motor. The output shaft of the reducer is connected to the drill rod 9 for transmission. The mining general electric drill motor and the matching reducer can be selected as 5-10kW motors as needed.

[0049] The usage process of this utility model is as follows: fix the front hook 11 of the track frame 5 to the lower outer edge of the coke hole 3, fix the base 13, install the transparent baffle 10 and the spray gun water pipe, push the drill bit from bottom to top to press the bottom of the slag coke block, turn on the spray gun 12 and start the mining electric drill motor 8. Since the drill head is a pagoda-shaped cone, it can quickly drill into the interior of the sintered ash coke block and break it open, greatly improving the cleaning efficiency of ash coke block, and safely and efficiently handling the ash coke coking accident on the upper part of the furnace bottom dry slag machine 4. Through the drill bit and the threaded drill rod 9, which is similar to a self-tapping screw, the mining electric motor drives the drill into the gaps and holes of the ash coke block at the bottom of the furnace. The threaded drill bit drives the drill rod 9 to rotate, generating a strong spiraling, squeezing, cutting and crushing effect into the coke block, thereby breaking the large hard slag coke block into small pieces, which are finally transported away by the dry slag machine 4.

[0050] Any adaptive changes made according to actual needs are within the protection scope of this utility model.

[0051] It should be noted that, for those skilled in the art, it is obvious that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered as exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A boiler furnace bottom ash clinker breaker characterized by, The application relates to a coke breaking device, which comprises a base arranged outside a boiler, a track frame rotatably connected with the base, and a breaking device capable of sliding on the track frame, wherein the breaking device comprises a drill rod extending into a coke poking hole of the boiler, a drill bit arranged on the drill rod for breaking ash and slag, and a driving member for driving the drill rod to rotate.

2. A boiler furnace bottom ash clinker breaker according to claim 1, characterised in that, A screw rod is arranged on the track frame in the axial direction of the drill rod, a sliding base is slidingly arranged on the screw rod, and the driving member is fixedly arranged on the sliding base.

3. A boiler furnace bottom ash clinker breaker according to claim 1, characterized in that, A rotating shaft is arranged on the base, and the area close to the end of the track frame is arranged on the rotating shaft.

4. The boiler furnace bottom ash clinker breaker according to claim 1, characterized in that, The base and the track frame are connected through a ball hinge structure.

5. The boiler furnace bottom ash clinker breaker according to claim 1, characterized in that, A fixing device is arranged at the end of the track frame away from the base, and the fixing device comprises a connecting rod arranged on the track frame and a hook arranged at the two ends of the connecting rod for lapping the lower edge outside the coke poking hole.

6. A boiler furnace bottom ash clinker breaker according to claim 5, characterised in that, A handle is arranged at the end of the track frame away from the hook.

7. A boiler furnace bottom ash clinker breaker according to claim 5, characterised in that, A water gun with the same axial direction as the drill rod is arranged on the connecting rod.

8. A boiler furnace bottom ash clinker breaker according to claim 7, characterised in that, A water outlet of the water gun is provided with an atomizing nozzle.

9. The boiler furnace bottom ash clinker breaker of claim 5, wherein, A transparent baffle for preventing ash and slag from splashing is arranged on the track frame, and the transparent baffle is provided with a penetrating hole for the drill rod to penetrate.

10. The boiler furnace bottom ash clinker breaker according to claim 1, characterized in that, The driving member comprises a mine electric drill motor and a speed reducer connected with the output shaft of the electric drill motor, and the output shaft of the speed reducer is in transmission connection with the drill rod.

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