A boiler slag removal system based on cleaning chain

Abstract

The embodiment of the present application provides a boiler slag discharge system based on a cleaning chain, including a slag dryer, a slag crusher, a bucket elevator, and a transfer assembly. The transfer assembly includes a conveyor belt and a cleaning chain. The conveyor belt is used to receive and transfer slag discharged from the boiler. The slag dryer is arranged on the circumferential side of the conveyor belt along a first direction. The slag crusher corresponds to the discharge port of the conveyor belt. The cleaning chain is arranged below the conveyor belt. The cleaning chain includes multiple rotating wheels and a chain. The chain is sleeved on the multiple rotating wheels and the chain is meshed with the multiple rotating wheels. The first direction is parallel to the length direction of the conveyor belt. At least one cleaning plate is provided on the chain. The cleaning plate is driven by the chain. The cleaning plate includes a main scraper and a pre-scraper. The main scraper extends along the second direction. One end of the pre-scraper is detachably connected to the main scraper, and the other end extends forward of the main scraper's movement direction. The angle between the extension direction of the pre-scraper and the second direction is an acute angle.

Description

Technical Field

[0001] The present application belongs to the technical field of combustion boilers, and in particular relates to a boiler slag removal system based on a cleaning chain. Background Art

[0002] In the actual use of combustion boilers, a slag discharge system is required to meet the needs of boiler fuel replacement. In related technologies, the accumulation of ash inside the slag discharge system is one of the important factors affecting the normal operation of the slag discharge system. During use, due to the small size of the ash, some of the fallen ash does not enter the transmission component, but falls directly below the slag discharge system. As the fallen ash continues to accumulate, when the ash accumulates too much, it will cause chain derailment, increased chain wear, and other equipment damage. Therefore, a cleaning mechanism will also be set up inside the relevant slag discharge system to meet the cleaning needs of the slag discharge system.

[0003] However, due to the high working intensity of the slag discharge system, the wear of the cleaning mechanism is aggravated, resulting in a limited actual service life of the cleaning mechanism, which is not conducive to the long-term use of the slag discharge system. Summary of the Invention

[0004] The embodiment of the present application provides a boiler slag discharge system based on a cleaning chain, which is convenient for improving the cleaning quality of the slag discharge system and extending the service life of the cleaning mechanism of the slag discharge system.

[0005] The present application provides a boiler slag removal system based on a sweeping chain, comprising a slag dryer, a slag crusher, a bucket elevator, and a transfer assembly. The slag dryer is used to dry the slag discharged from the boiler, the slag crusher is used to crush the slag dried by the dryer, and the bucket elevator, corresponding to the discharge port of the slag crusher, is used to transport the crushed slag.

[0006] The transfer component includes a conveyor belt and a cleaning chain. The conveyor belt is used to receive and transfer the slag discharged from the boiler. The slag dryer is arranged on the circumferential side of the conveyor belt along the first direction. The slag crusher corresponds to the discharge port of the conveyor belt. The cleaning chain is arranged below the conveyor belt. The cleaning chain includes multiple rotating wheels and chains. The chain is sleeved on the multiple rotating wheels, and the chain is meshed with the multiple rotating wheels. The first direction is parallel to the length direction of the conveyor belt.

[0007] At least one cleaning plate is provided on the chain, and the cleaning plate is driven by the chain. The cleaning plate includes a main scraper and a pre-scraper. The main scraper extends along the second direction. One end of the pre-scraper is detachably connected to the main scraper, and the other end extends toward the front of the movement direction of the main scraper. The angle between the extension direction of the pre-scraper and the second direction is an acute angle, and the second direction is perpendicular to the first direction and the thickness direction of the main scraper.

[0008] By adopting the above structure and setting a pre-scraper, firstly, the cleaning chain can have a multi-stage cleaning capability, thereby improving the cleaning effect; secondly, the pre-scraper cleans first and then the main scraper cleans, which can effectively reduce the cleaning wear on the main scraper; thirdly, the main scraper and the pre-scraper are detachably connected, which facilitates the removal and modification of the pre-scraper from the main scraper, thereby reducing the maintenance difficulty of the cleaning chain and facilitating the adaptation of the cleaning chain to a high-intensity working environment; fourthly, the main scraper and the pre-scraper are detachably connected, which also facilitates the flexible selection of the pre-scraper according to the working conditions, thereby reducing the situation where the ash is not thoroughly cleaned due to the fixed size of the cleaning mechanism set inside the equipment.

[0009] In some optional embodiments of the present application, the main scraper includes a mounting hole, which is used to connect with the pre-scraper, and the mounting hole includes a hole body and a snap-on sub-hole, and the hole body is arranged along the thickness direction of the main scraper, and the inner wall of the hole body on the side close to the chain is a first wall, and the first wall is inclined and parallel to the extension direction of the pre-scraper, and the snap-on sub-hole is located on the first wall away from the end of the pre-scraper, and extends toward the chain along the second direction.

[0010] The pre-scraping plate includes a pre-scraping body and a connecting sub-plate, the connecting sub-plate is arranged at one end of the pre-scraping body and extends along the second direction, the connecting sub-plate cooperates with and is connected to the buckle sub-hole, and the cleaning plate also includes a fixing member, which is used to fix the connecting sub-plate and the buckle sub-hole.

[0011] By adopting the above structure, firstly, by setting a first wall parallel to the extension direction of the pre-scraper, it is possible to facilitate the pre-scraper to fit with the mounting hole, thereby improving the overall structural strength after the pre-scraper is connected to the main scraper; secondly, by setting a connecting sub-plate and a snap-on sub-hole extending along the second direction, the connection structure between the pre-scraper and the main scraper can be made simpler while meeting the fixing requirements, thereby reducing the difficulty of disassembly and installation; thirdly, by setting a connecting sub-plate and a snap-on sub-hole, sufficient area can be reserved on the pre-scraper for fixing the structural setting of the pre-scraper and the main scraper.

[0012] In some optional embodiments of the present application, the main scraper also includes a first fixing hole, the connecting sub-plate also includes a second fixing hole, the fixing part includes a fixing bolt and a fixing nut, the fixing bolt is passed through the first fixing hole and the second fixing hole, and is connected to the fixing nut.

[0013] With the above structure, the main scraper and the pre-scraper can be stably connected by providing the first fixing hole, the second fixing hole, the fixing bolt and the fixing nut.

[0014] In some optional embodiments of the present application, the inner wall on the side of the hole body away from the chain is a second wall, and the cleaning plate also includes a pad detachably connected to the second wall, and the pad is used to fill the gap between the second wall and the pre-scraper, and the pad can abut against the pre-scraper.

[0015] By adopting the above structure and providing the spacer, the contact area between the main scraper and the pre-scraper can be increased, and the structural strength between the main scraper and the pre-scraper can be improved.

[0016] In some optional embodiments of the present application, along the second direction, a bottom edge of the pre-scraper away from the chain is higher than a bottom edge of the main scraper away from the chain.

[0017] By adopting the above structure, multi-level cleaning can be achieved by making the bottom edge of the pre-scraper away from the chain higher than the bottom edge of the main scraper away from the chain, reducing the amount of ash cleaned on each plate. This can not only reduce the leakage of ash caused by excessive cleaning volume and improve the cleaning effect, but also reduce the wear intensity of the main scraper and pre-scraper, and increase the service life of the cleaning plate.

[0018] In some optional embodiments of the present application, the main scraper also includes a scratch-resistant coating, which is arranged on the bottom edge of the main scraper away from the chain. The width of the scratch-resistant coating in the second direction is L1, and the distance between the bottom edge of the pre-scraper away from the chain and the bottom edge of the main scraper away from the chain in the second direction is L2, satisfying L1>L2.

[0019] With the above structure, by making L1>L2, the parts of the main scraper that come into contact with ash during cleaning can be coated with a wear-resistant coating, thereby improving the wear resistance of the main scraper.

[0020] In some optional embodiments of the present application, along the second direction, the bottom edge of the pre-scraper away from the chain is serrated.

[0021] With the above structure, by setting the bottom edge of the pre-scraper away from the chain to a serrated shape, the ash to be cleaned can be scraped and combed, making the ash more dispersed and reducing the cleaning difficulty of the main scraper.

[0022] In some optional embodiments of the present application, the conveyor belt includes a horizontally arranged straight section and a lifting section arranged at an angle to the straight section, and the cleaning chain at least partially extends below the lifting section.

[0023] With the above structure, by extending the cleaning chain at least partially to below the lifting section, the ash accumulated below the lifting section can be effectively cleaned.

[0024] In some optional embodiments of the present application, the included angle between the extension direction of the pre-scraper and the second direction is α, which satisfies 45°≥α≥15°.

[0025] By adopting the above structure, by constraining the range of the angle α between the extension direction of the pre-scraper and the second direction, the problem of excessive force on the pre-scraper and damage to the pre-scraper due to the angle α being too large can be reduced. It can also reduce the problem of the pre-scraper and the main scraper being too close due to the angle α being too small, resulting in poor graded cleaning effect.

[0026] In some optional embodiments of the present application, the boiler slag discharge system also includes a cleaning component, which includes a ventilation pipeline and an air source connected to the ventilation pipeline; the ventilation pipeline includes a first pipeline arranged along the length direction of the cleaning chain, one end of each of the first pipelines is connected to the air source for receiving gas, and the other end is closed, and the first pipeline is arranged on both sides of the cleaning chain; the ventilation pipeline also includes a second pipeline whose two ends are respectively connected to the first pipeline arranged on both sides of the cleaning chain, and the second pipeline is provided with a first air outlet.

[0027] By adopting the above scheme, first, first pipes are arranged along the length direction of the cleaning chain on both sides of the cleaning chain, one end of each of the first pipes is connected to the gas source to access the gas, and the other end is closed, so that the gases accessed by the two first pipes are output relative to each other and merged in the second pipe, thereby increasing the output pressure of the first air outlet in the second pipe, and using the gas output from the first air outlet to blow the slag, thereby improving the slag cleaning capacity.

[0028] Compared with the related art, in the boiler slag discharge system based on the cleaning chain of the embodiment of the present application, by setting a pre-scraper, first, the cleaning chain can have multi-stage cleaning capabilities, thereby improving the cleaning effect; second, the pre-scraper cleans first and then the main scraper cleans, which can effectively reduce the cleaning wear on the main scraper; third, the main scraper and the pre-scraper are detachably connected, which facilitates the removal and modification of the pre-scraper from the main scraper, thereby reducing the maintenance difficulty of the cleaning chain and facilitating the adaptation of the cleaning chain to high-intensity working environments; fourth, the main scraper and the pre-scraper are detachably connected, which also facilitates the flexible selection of the pre-scraper according to the working conditions, thereby reducing the situation where the ash cleaning is not thorough due to the fixed size of the cleaning mechanism set inside the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 It is a structural schematic diagram of an embodiment of a boiler slag discharge system in this application.

[0031] Figure 2 It is a schematic diagram of the internal structure of an embodiment of the transfer component in this application.

[0032] Figure 3 It is a partially enlarged schematic diagram of an embodiment of the cleaning chain in this application.

[0033] Figure 4 yes Figure 3 Schematic diagram of the internal structure at A in the middle.

[0034] Figure 5 yes Figure 4 A schematic structural diagram of an embodiment of the middle main scraper.

[0035] Figure 6 yes Figure 4 A schematic structural diagram of an embodiment of a middle pre-scraper.

[0036] Figure 7 It is a structural schematic diagram of an embodiment of a pre-scraper in this application.

[0037] Figure 8 It is a structural schematic diagram of another embodiment of the boiler slag discharge system in this application.

[0038] Figure 9 It is a schematic diagram of the internal structure of another embodiment of the boiler slag discharge system in this application.

[0039] Figure 10 It is a side view schematic diagram of an embodiment of the cleaning component in this application.

[0040] Figure 11 It is a top view schematic diagram of an embodiment of the cleaning component in this application.

[0041] Figure 12 It is a schematic diagram of the external structure of an embodiment of the first pipeline in this application.

[0042] Figure 13 It is a schematic diagram of the internal structure of the first pipeline embodiment in this application.

[0043] Figure 14 It is a structural diagram of an embodiment of the support foot in this application.

[0044] In the attached figure:

[0045] 1. Slag dryer; 2. Slag crusher; 3. Bucket elevator; 4. Transfer assembly; 41. Feed hopper; 42. Transfer housing; 43. Conveyor belt; 431. Straight section; 432. Elevator section; 44. Cleaning chain; 441. Rotating wheel; 442. Chain; 443. Cleaning plate; 4431. Main scraper; 4432. Pre-scraper; 4433. Spacer; 444. Fixing piece; 4441. Fixing bolt; 4442. Fixing nut; 5. Silo;

[0046] 311, mounting hole; 3111, hole body; 3112, buckle sub-hole; 3113, first wall; 3114, second wall; 312, first fixing hole; 321, pre-scratching body; 322, connecting sub-plate; 323, second fixing hole;

[0047] 6. Cleaning assembly; 61. Ventilation pipeline; 611. First pipeline; 612. Second pipeline; 6121. First air outlet; 62. Air source; 63. Drive chain; 64. Drive motor; 65. Support foot; 651. Connector; 652. Support member. DETAILED DESCRIPTION

[0048] The following embodiments of the technical solution of the present application are described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0050] In the description of the implementation methods of this application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features.

[0051] Reference herein to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it refer to independent or alternative embodiments that are mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0052] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0053] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0054] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the embodiments of the present application.

[0055] In the description of the embodiments of this application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of this application based on specific circumstances.

[0056] Example

[0057] The first direction referred to in the embodiments of the present application is the x-axis direction in the figure, and the second direction is the y-axis direction in the figure.

[0058] Figure 1 It is a structural schematic diagram of an embodiment of a boiler slag discharge system in this application; Figure 2 It is a schematic diagram of the internal structure of the transfer component 4 in this application; Figure 3 It is a partially enlarged schematic diagram of the cleaning chain 44 in this application.

[0059] like Figures 1 to 3As shown, in some embodiments of the present application, a boiler slag discharge system based on a cleaning chain 44 is provided, comprising a slag dryer 1, a slag crusher 2, a bucket elevator 3, and a transfer assembly 4. The slag dryer 1 is used to dry the slag discharged from the boiler, the slag crusher 2 is used to crush the slag dried by the slag dryer 1, and the bucket elevator 3, corresponding to the discharge port of the slag crusher 2, is used to transport the slag crushed by the slag crusher 2.

[0060] The transfer component 4 includes a conveyor belt 43 and a cleaning chain 44. The conveyor belt 43 is used to receive and transfer the slag discharged from the boiler. The slag dryer 1 is arranged on the circumferential side of the conveyor belt 43 along the first direction. The slag crusher 2 corresponds to the discharge port of the conveyor belt 43. The cleaning chain 44 is arranged below the conveyor belt 43. The cleaning chain 44 includes multiple rotating wheels 441 and a chain 442. The chain 442 is sleeved on the multiple rotating wheels 441, and the chain 442 is engaged with the multiple rotating wheels 441. The first direction is parallel to the length direction of the conveyor belt 43.

[0061] At least one cleaning plate 443 is provided on the chain 442, and the cleaning plate 443 is driven by the chain 442. The cleaning plate 443 includes a main scraper 4431 and a pre-scraper 4432. The main scraper 4431 extends along the second direction. One end of the pre-scraper 4432 is detachably connected to the main scraper 4431, and the other end extends toward the front of the movement direction of the main scraper 4431. The angle between the extension direction of the pre-scraper 4432 and the second direction is an acute angle, and the second direction is perpendicular to the first direction and the thickness direction of the main scraper 4431.

[0062] The slag discharged from the boiler refers to the combustion residue in the boiler, such as ash.

[0063] The rotating wheel 441 may be a sprocket matched with the chain 442 .

[0064] One end of the pre-scraper 4432 is detachably connected to the main scraper 4431 , and one end of the pre-scraper 4432 can be threadedly connected to the main scraper 4431 , or snap-connected.

[0065] By setting the pre-scraper 4432, firstly, the cleaning chain 44 can have a multi-stage cleaning capability, thereby improving the cleaning effect; secondly, the pre-scraper 4432 cleans first, and then the main scraper 4431 cleans, which can effectively reduce the cleaning wear on the main scraper 4431; thirdly, the main scraper 4431 and the pre-scraper 4432 are detachably connected, which facilitates the removal and modification of the pre-scraper 4432 from the main scraper 4431, thereby reducing the maintenance difficulty of the cleaning chain 44 and facilitating the adaptation of the cleaning chain 44 to a high-intensity working environment; fourthly, the main scraper 4431 and the pre-scraper 4432 are detachably connected, which also facilitates the flexible selection of the pre-scraper 4432 according to the working conditions, thereby reducing the situation where the ash is not thoroughly cleaned due to the fixed size of the cleaning mechanism set inside the equipment.

[0066] Optionally, the transfer component 4 further includes a transfer shell 42 , which is a shell-like structure having an independent space inside, and the conveyor belt 43 and the cleaning chain 44 are arranged in the transfer shell 42 .

[0067] Optionally, a feed hopper 41 is further provided on the transfer shell 42 , and the feed hopper 41 is communicated with the internal space of the transfer shell 42 for allowing the slag to enter the transfer component 4 .

[0068] Optionally, the slag dryer 1 may be arranged on the outer wall of the transfer shell 42 , such as the slag dryer 1 is arranged on the outer wall of the top of the lifting section 432 on the transfer shell 42 .

[0069] Optionally, the silo 5 may be arranged opposite to the bucket elevator 3 to receive the slag material transmitted by the bucket elevator 3 .

[0070] In actual use, the running direction of the cleaning chain 44 is the same as the running direction of the conveyor belt 43 , such as the upper surface of the conveyor belt 43 is transported from the straight section 431 to the lifting section 432 .

[0071] Figure 4 yes Figure 3 Schematic diagram of the internal structure at A in the middle. Figure 5 yes Figure 4 Schematic diagram of the structure of the middle main scraper 4431, Figure 6 yes Figure 4 Schematic diagram of the structure of the middle pre-scraper 4432.

[0072] like Figures 3 to 6 As shown, in some optional embodiments of the present application, the main scraper 4431 includes a mounting hole 311, which is used to connect with the pre-scraper 4432. The mounting hole 311 includes a hole body 3111 and a snap-on sub-hole 3112. The hole body 3111 is arranged along the thickness direction of the main scraper 4431. The inner wall of the hole body 3111 on the side close to the chain 442 is a first wall 3113. The first wall 3113 is inclined and parallel to the extension direction of the pre-scraper 4432. The snap-on sub-hole 3112 is located on the first wall 3113 away from the end of the pre-scraper 4432 and extends along the second direction toward the chain 442.

[0073] The pre-scraping plate 4432 includes a pre-scraping body 321 and a connecting sub-plate 322. The connecting sub-plate 322 is arranged at one end of the pre-scraping body 321 and extends along the second direction. The connecting sub-plate 322 cooperates with and is connected to the buckle sub-hole 3112. The cleaning plate 443 also includes a fixing part 444, which is used to fix the connecting sub-plate 322 and the buckle sub-hole 3112.

[0074] The fixing member 444 refers to a component used to fix the connecting sub-plate 322 and the buckle sub-hole 3112, such as a threaded structure, a locking pin, a buckle, etc.

[0075] First, by setting a first wall 3113 parallel to the extension direction of the pre-scraper 4432, the pre-scraper 4432 can be easily fitted with the mounting hole 311, thereby improving the overall structural strength of the pre-scraper 4432 after being connected to the main scraper 4431. Secondly, by setting a connecting sub-plate 322 and a snap-on sub-hole 3112 extending along the second direction, the connection structure between the pre-scraper 4432 and the main scraper 4431 can be made simpler while meeting the fixing requirements, thereby reducing the difficulty of disassembly and installation. Thirdly, by setting the connecting sub-plate 322 and the snap-on sub-hole 3112, sufficient area can be reserved on the pre-scraper 4432 for fixing the structural setting of the pre-scraper 4432 and the main scraper 4431.

[0076] like Figures 4 to 6 As shown, in some optional embodiments of the present application, the main scraper 4431 further includes a first fixing hole 312, the connecting sub-plate 322 further includes a second fixing hole 323, and the fixing member 444 includes a fixing bolt 4441 and a fixing nut 4442. The fixing bolt 4441 is inserted through the first fixing hole 312 and the second fixing hole 323 and connected to the fixing nut 4442. The provision of the first fixing hole 312, the second fixing hole 323, the fixing bolt 4441, and the fixing nut 4442 enables a stable connection between the main scraper 4431 and the pre-scraper 4432.

[0077] It can be understood that one end of the first fixing hole 312 is arranged in the snap-on sub-hole 3112, and the other end passes through the hole body of the main scraper 4431 along the thickness direction. In order to facilitate the passage of the fixing bolt 4441, the first fixing hole 312 and the second fixing hole 323 are configured to overlap when the connecting sub-plate 322 is matched with the snap-on sub-hole 3112.

[0078] like Figure 4 As shown, in some optional embodiments of the present application, the inner wall of the hole body 3111 on the side away from the chain 442 is the second wall 3114, and the cleaning plate 443 further includes a spacer 4433 detachably connected to the second wall 3114. The spacer 4433 is used to fill the gap between the second wall 3114 and the pre-scraping plate 4432, and the spacer 4433 can abut against the pre-scraping plate 4432. By providing the spacer 4433, the contact area between the main scraper 4431 and the pre-scraping plate 4432 can be increased, thereby improving the structural strength between the main scraper 4431 and the pre-scraping plate 4432.

[0079] The pad 4433 is detachably connected to the second wall 3114 , and the pad 4433 can be threadedly connected to the second wall 3114 , snap-fitted, etc.

[0080] like Figure 3As shown, in some optional embodiments of the present application, along the second direction, the bottom edge of the pre-scraper 4432 away from the chain 442 is higher than the bottom edge of the main scraper 4431 away from the chain 442 .

[0081] By making the bottom edge of the pre-scraper 4432 away from the chain 442 higher than the bottom edge of the main scraper 4431 away from the chain 442, multi-stage cleaning can be achieved, reducing the amount of ash cleaned on each plate. This not only reduces the leakage of ash caused by excessive cleaning volume and improves the cleaning effect, but also reduces the wear intensity of the main scraper 4431 and the pre-scraper 4432, and increases the service life of the cleaning plate 443.

[0082] like Figure 3 As shown, in some optional embodiments of the present application, the main scraper 4431 further includes a scratch-resistant coating. The scratch-resistant coating is disposed on the bottom edge of the main scraper 4431 away from the chain 442. The width of the scratch-resistant coating in the second direction is L1. The distance in the second direction between the bottom edge of the pre-scraper 4432 away from the chain 442 and the bottom edge of the main scraper 4431 away from the chain 442 is L2, satisfying the condition L1>L2. By ensuring that L1>L2, the areas of the main scraper 4431 that come into contact with ash during cleaning can be coated with a wear-resistant coating, thereby improving the wear resistance of the main scraper 4431.

[0083] Optionally, the bottom of the pre-scraper 4432 away from the chain 442 may also be provided with a scratch-resistant coating.

[0084] It can be understood that the scratch-resistant coating is a coating-like structure applied on the main scraper 4431, and the wear resistance of the material used for the scratch-resistant coating is better than that of the main scraper 4431. For example, when the main scraper 4431 is made of steel, the scratch-resistant coating can be a chrome-plated layer.

[0085] Figure 7 It is a structural diagram of the pre-scraper 4432 in this application.

[0086] like Figure 7 As shown, in some optional embodiments of the present application, along the second direction, the bottom edge of the pre-scraper 4432 away from the chain 442 is serrated. By setting the bottom edge of the pre-scraper 4432 away from the chain 442 to be serrated, the ash to be cleaned can be scraped and combed, making the ash more dispersed, and reducing the cleaning difficulty of the main scraper 4431.

[0087] It can be understood that the bottom edge of the pre-scraper 4432 away from the chain 442 can also be wavy, comb-shaped, etc., and at this time, in the second direction, the farthest point of the pre-scraper 4432 away from the chain 442 is higher than the bottom edge of the main scraper 4431 away from the chain 442.

[0088] like Figure 2As shown, in some optional embodiments of the present application, the conveyor belt 43 includes a horizontally arranged straight section 431 and an elevated section 432 arranged at an angle to the straight section 431, and the cleaning chain 44 at least partially extends below the elevated section 432. By extending the cleaning chain 44 at least partially below the elevated section 432, the ash accumulated below the elevated section 432 can be effectively cleaned.

[0089] Optionally, the upward lifting angle of the lifting section 432 can be any value within a range of 10° to 30°, such as 15°, 20° or 25°.

[0090] Figure 3 : is a schematic structural diagram of the pre-scraping plate 4432 in the present application. In some optional embodiments of the present application, the angle between the extension direction of the pre-scraping plate 4432 and the second direction is α, which satisfies 45°≥α≥15°.

[0091] By constraining the range of the angle α between the extension direction of the pre-scraper 4432 and the second direction, the problem of excessive force on the pre-scraper 4432 and damage to the pre-scraper 4432 due to the angle α being too large can be reduced. It can also reduce the problem of the pre-scraper 4432 and the main scraper 4431 being too close due to the angle α being too small, resulting in poor graded cleaning effect.

[0092] Optionally, the included angle α between the extension direction of the pre-scraper 4432 and the second direction satisfies 40°≥α≥20°, 35°≥α≥25°, or 33°≥α≥30°.

[0093] Figure 8 This is a structural diagram of another embodiment of the boiler slag discharge system in this application. Figure 9 This is a schematic diagram of the internal structure of another embodiment of the boiler slag discharge system in this application. Figure 10 It is a side view schematic diagram of an embodiment of the cleaning component 6 in this application, Figure 11 This is a top view of an embodiment of the cleaning component 6 in this application. Figure 12 It is a schematic diagram of the external structure of an embodiment of the first pipeline 611 in this application.

[0094] like Figures 8 to 12As shown, in some optional embodiments of the present application, the boiler slag discharge system also includes a cleaning chain 44 and a cleaning assembly 6, the cleaning assembly 6 includes a ventilation pipeline 61 and a gas source 62 connected to the ventilation pipeline 61, the ventilation pipeline 61 includes a first pipe 611 arranged along the length direction of the cleaning chain 44, one end of each first pipe 611 is connected to the gas source 62 for receiving gas, and the other end is closed, the first pipe 611 is arranged on both sides of the cleaning chain 44, the ventilation pipeline 61 also includes a second pipe 612 whose two ends are respectively connected to the first pipe 611 arranged on both sides of the cleaning chain 44, and the second pipe 612 is provided with a first air outlet 6121.

[0095] Optionally, the ventilation line 61 is made of metal, and the interior and exterior of the metal ventilation line 61 are provided with an anti-corrosion coating. The anti-corrosion coating may be made of graphene oxide. As a derivative of graphene, graphene oxide has a single-layer two-dimensional network structure similar to graphene, and has oxygen-containing functional groups such as carboxyl, hydroxyl, and epoxy groups. This structure enables GO to have the advantages of graphene such as excellent shielding performance, high aspect ratio, ultra-high strength, ultra-high thermal conductivity, and high surface activity, while also having excellent physical, chemical, optical, and electrical properties.

[0096] First, first pipes 611 are arranged on both sides of the cleaning chain 44 along the length direction of the cleaning chain 44, one end of each first pipe 611 is connected to the gas source 62 to access the gas, and the other end is closed, so that the gases accessed by the two first pipes 611 are output relative to and merged in the second pipe 612, thereby increasing the output pressure of the first air outlet 6121 in the second pipe 612, and using the gas output from the first air outlet 6121 to blow the slag, thereby improving the slag cleaning ability.

[0097] In some optional embodiments of the present application, the first air outlet holes 6121 are arranged in an array along the length direction of the second pipe 612, and there is at least one row of first air outlet holes 6121. In the cross section of the first pipe 611, the angles between two adjacent rows of first air outlet holes 6121 are the same.

[0098] Since the first pipe 611 is arranged on both sides of the cleaning chain 44, and the two ends of the second pipe 612 are respectively connected to the first pipe 611 arranged on both sides of the cleaning chain 44, the first air outlet holes 6121 arranged in a row of the second pipe 612 can cover the entire width range of the cleaning chain 44, thereby improving the cleaning ability.

[0099] In some optional embodiments of the present application, the second pipe 612 is provided with a row of first air outlet holes 6121. Since the first pipe 611 is provided with only one row of first air outlet holes 6121, the air outlet is more concentrated, thereby improving the cleaning ability.

[0100] In some optional embodiments of the present application, the second pipe 612 is provided with two rows of first air outlet holes 6121. The first pipe 611 is provided with two rows of first air outlet holes 6121, and the two rows of first air outlet holes 6121 can alternately discharge air, thereby improving cleaning efficiency while ensuring air pressure.

[0101] Figure 13 It is a schematic diagram of the internal structure of an embodiment of the first pipeline 611 in this application.

[0102] like Figure 13 As shown, in some optional embodiments of the present application, the opening area of the first air outlet 6121 arranged inside the second pipe 612 is larger than the opening area arranged outside the second pipe 612, and the cross-sectional area of the first air outlet 6121 decreases uniformly from the inside side of the second pipe 612 to the outside side of the second pipe 612, and the line connecting the center of gravity of the opening of the first air outlet 6121 on the inside side of the second pipe 612 and the center of gravity of the opening of the first air outlet 6121 on the outside side of the second pipe 612 is the axis of the internal space of the first air outlet 6121.

[0103] In some optional embodiments of the present application, the openings of the first air outlet 6121 inside and outside the second pipe 612 are both circular, the opening area of the first air outlet 6121 arranged inside the second pipe 612 is larger than the opening area arranged outside the second pipe 612, and the cross-sectional area of the first air outlet 6121 decreases uniformly from the inside side of the second pipe 612 to the outside side of the second pipe 612, so that each first air outlet 6121 is a conical cavity.

[0104] Since the opening area of the first air outlet 6121 inside the second pipe 612 is larger than the opening area set on the outside, on the one hand, it can prevent external furnace ash from entering the first air outlet 6121. On the other hand, since the external opening area is smaller, the output pressure of the gas can be increased and the cleaning ability can be improved.

[0105] Optionally, the gas source 62 may include a gas storage tank and a pressure pump, wherein the pressure pump is used to pressurize the output gas of the gas storage tank. By pressurizing the output gas through the pressure pump, the output gas pressure is increased, thereby improving the gas cleaning effect.

[0106] Optionally, a gas tank is used to store inert gas.

[0107] Optionally, the first pipe 611 is provided with a connecting hole, and one end of the second pipe 612 extends into the connecting hole of the first pipe 611, so that the second pipe 612 is movably connected to the first pipe 611, and the second pipe 612 is connected to a drive chain 63, and the drive chain 63 drives the second pipe 612 to rotate, so that the first air outlet 6121 rotates to discharge air, and the drive chain 63 is connected to a drive motor 64.

[0108] Optionally, the second pipe 612 is movably connected to the first pipe 611 so that the second pipe 612 can rotate freely, and the drive chain 63 cooperates with the outer wall of the second pipe 612 to drive the second pipe 612 to rotate.

[0109] In some optional embodiments of the present application, the outer wall of the second pipe 612 is provided with transmission teeth, which cooperate with the drive chain 63. The first air outlet 6121 can rotate to discharge air, and can discharge air in all directions, thereby improving the air discharge and cleaning ability of the second pipe 612.

[0110] In some optional embodiments of the present application, the first pipe 611 is provided with second air outlets at equal intervals along the length direction of the first pipe 611 , and the second air outlets of the first pipe 611 on both sides of the cleaning chain 44 are arranged opposite to each other.

[0111] In some optional embodiments of the present application, the structure of the second air outlet is the same as the first air outlet 6121. The second air outlets of the first pipe 611 on both sides of the cleaning chain 44 are arranged opposite to each other, so that the second air outlets discharge air relative to each other, thereby improving the cleaning ability of the first pipe 611.

[0112] Figure 14 It is a structural diagram of an embodiment of the support foot 65 in this application.

[0113] like Figure 14 As shown, in some optional embodiments of the present application, the first pipe 611 is provided with a support foot 65 at one closed end, and the support foot 65 includes a connecting member 651 and a supporting member 652. The connecting member 651 is connected to the end face of the closed end of the first pipe 611, and one end of the supporting member 652 is connected to the connecting member 651. The support foot 65 is used to provide support for the first pipe 611 on the side away from the connection end.

[0114] Optionally, the closed end of the first pipe 611 is the end away from the connection between the first pipe 611 and the gas source 62, and the support foot 65 can provide support for the first pipe 611 on the side away from the connection end. The support foot 65 is used to provide support for the first pipe 611 on the side away from the connection end to prevent the first pipe 611 from collapsing during long-term use, which would affect the gas outlet effect of the pipe.

[0115] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the various embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A boiler slag removal system based on a cleaning chain, characterized in that: include: Slag dryer (1), used for drying slag discharged from the boiler; A slag crusher (2) for crushing the slag dried by the slag dryer (1); A bucket elevator (3), corresponding to the discharge port of the slag crusher (2), for transporting slag crushed by the slag crusher (2); A transfer assembly (4) comprising a conveyor belt (43) and a cleaning chain (44), wherein the conveyor belt (43) is used to receive and transfer slag discharged from the boiler, the slag dryer (1) is arranged on the circumferential side of the conveyor belt (43) along a first direction, the slag crusher (2) corresponds to the discharge port of the conveyor belt (43), the cleaning chain (44) is arranged below the conveyor belt (43), the cleaning chain (44) comprises a plurality of rotating wheels (441) and a chain (442), the chain (442) is sleeved on the plurality of rotating wheels (441), and the chain (442) is meshed with the plurality of rotating wheels (441), and the first direction is parallel to the length direction of the conveyor belt (43); Wherein, at least one cleaning plate (443) is provided on the chain (442), and the cleaning plate (443) is driven by the chain (442). The cleaning plate (443) includes a main scraper (4431) and a pre-scraper (4432). The main scraper (4431) extends along the second direction. One end of the pre-scraper (4432) is detachably connected to the main scraper (4431), and the other end extends toward the front of the movement direction of the main scraper (4431). The angle between the extension direction of the pre-scraper (4432) and the second direction is an acute angle. The second direction is perpendicular to the first direction and the thickness direction of the main scraper (4431); the main scraper (4431) includes a mounting hole ( 311), the mounting hole (311) is used to connect with the pre-scraper (4432), the mounting hole (311) includes a hole body (3111) and a buckle hole (3112), the hole body (3111) is arranged along the thickness direction of the main scraper (4431), the inner wall of the hole body (3111) on the side close to the chain (442) is a first wall (3113), the first wall (3113) is inclined and parallel to the extension direction of the pre-scraper (4432), the buckle hole (3112) is located on the end of the first wall (3113) away from the pre-scraper (4432), and extends along the second direction toward the chain (442), The pre-scraping plate (4432) comprises a pre-scraping body (321) and a connecting sub-plate (322). The connecting sub-plate (322) is arranged at one end of the pre-scraping body (321) and extends along the second direction. The connecting sub-plate (322) is matched with and connected to the buckle sub-hole (3112). The cleaning plate (443) further comprises a fixing member (444), wherein the fixing member (444) is used to fix the connecting sub-plate (322) and the buckling sub-hole (3112).

2. The boiler slag removal system according to claim 1, characterized in that: The main scraper (4431) further includes a first fixing hole (312), the connecting sub-plate (322) further includes a second fixing hole (323), the fixing member (444) includes a fixing bolt (4441) and a fixing nut (4442), the fixing bolt (4441) is passed through the first fixing hole (312) and the second fixing hole (323), and is connected to the fixing nut (4442).

3. The boiler slag removal system according to claim 1, characterized in that: The inner wall of the hole body (3111) on the side away from the chain (442) is a second wall (3114), and the cleaning plate (443) further includes a pad (4433) detachably connected to the second wall (3114), and the pad (4433) is used to fill the gap between the second wall (3114) and the pre-scraping plate (4432), and the pad (4433) can abut against the pre-scraping plate (4432).

4. The boiler slag removal system according to claim 1, characterized in that: Along the second direction, the bottom edge of the pre-scraper (4432) away from the chain (442) is higher than the bottom edge of the main scraper (4431) away from the chain (442).

5. The boiler slag removal system according to claim 4, characterized in that: The main scraper (4431) further includes a scratch-resistant coating, which is provided on the main scraper (4431) at a bottom edge away from the chain (442). The width of the scratch-resistant coating in the second direction is L1. The distance between the bottom edge of the pre-scraper (4432) away from the chain (442) and the bottom edge of the main scraper (4431) away from the chain (442) in the second direction is L2, satisfying L1>L2.

6. The boiler slag removal system according to claim 1, characterized in that: Along the second direction, the bottom edge of the pre-scraper (4432) away from the chain (442) is serrated.

7. The boiler slag removal system according to claim 1, characterized in that: The conveyor belt (43) comprises a horizontally arranged straight section (431) and a lifting section (432) arranged at an angle to the straight section (431), and the cleaning chain (44) at least partially extends below the lifting section (432).

8. The boiler slag removal system according to claim 1, characterized in that: The included angle between the extension direction of the pre-scraper (4432) and the second direction is α, which satisfies the following conditions: 45°≥α≥15°.

9. The boiler slag removal system according to claim 1, characterized in that: The boiler slag discharge system further includes a cleaning component (6), the cleaning component (6) including a ventilation pipeline (61) and an air source (62) connected to the ventilation pipeline (61); the ventilation pipeline (61) includes a first pipe (611) arranged along the length direction of the cleaning chain (44), one end of each first pipe (611) is connected to the air source (62) for receiving gas, and the other end is closed, and the first pipe (611) is arranged on both sides of the cleaning chain (44); the ventilation pipeline (61) further includes a second pipe (612) whose two ends are respectively connected to the first pipe (611) arranged on both sides of the cleaning chain (44), and the second pipe (612) is provided with a first air outlet (6121).

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