Horizontal flue settled ash dredging device and coal-fired boiler
By designing a horizontal flue settlement ash cleaning device, the combination of ash bucket, ash guide tube and a shutter is used to solve the problems of poor effect, high energy consumption and easy corrosion in the traditional soot blowing method, and achieves an efficient and low-consumption ash cleaning effect.
Patent Information
- Application Number
- CN202421649317.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-11
- Publication Date
- 2025-04-18
- Estimated Expiration
- 2034-07-11
AI Technical Summary
The traditional horizontal flue ash removal method has problems such as poor soot blowing effect, high energy consumption, and easy corrosion of the pipe wall.
A horizontal flue settlement ash cleaning device is designed, including ash bucket, ash guide tube and a shutter. The ash bucket is set below the position of easy accumulation of dust. The ash guide tube is connected to the water-cooled wall of the boiler slope through the ash bucket. The shutter opens the ash guide tube when there is settlement ash, and cuts off the ash guide tube when there is no settlement ash.
It realizes effective cleaning of settlement ash, reduces energy consumption, avoids cavitation, and ensures the normal use of the boiler.
Smart Images
Figure CN222773323U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of boiler ash cleaning, in particular to a horizontal flue ash settling cleaning device and a coal-fired boiler. Background Art
[0002] The boiler structure of coal-fired power units is diverse. The bottom of the boiler horizontal flue (from the turning point of the flame folding angle to the center line of the front wall of the rear shaft) is mainly composed of water-cooled wall tube screens. The bottom slope of the front section of the horizontal flue of some units is 35°, while the bottom slope of the rear section is only 5°. In addition, in order to reduce the cost of power generation, power generation companies often burn economic coal with high ash content, which makes it easier for ash to accumulate at the bottom of the rear section of the flue during normal operation of the unit. The average ash accumulation thickness is more than 1.5 meters, which has submerged the U-shaped bend pipe at the lower part of the heating surface at this position and caused the tube screen to overheat, deform and be out of the column due to limited expansion, seriously affecting the safe and economical operation of the boiler. Under low-load conditions, the flue gas volume is reduced, the flue gas flow rate is reduced, and the ash accumulation problem in the horizontal flue is more serious.
[0003] At present, the soot removal of horizontal flue is mainly done by sootblowing with sootblower and steam medium sootblowing. Among them, the sootblowing method with sootblower cannot completely blow the soot at the soot accumulation position, and the sootblowing effect is poor. The sootblowing method with steam medium consumes a lot of energy and is prone to cavitation of the pipe wall. It can be seen that the traditional sootblowing method has technical problems such as poor sootblowing effect, high energy consumption, and easy corrosion of the pipe wall. Utility Model Content
[0004] In order to solve the technical problems of poor soot blowing effect, high energy consumption and easy corrosion of pipe wall in the traditional soot blowing method, the utility model provides a horizontal flue sedimentation ash cleaning device and a coal-fired boiler.
[0005] The utility model provides a horizontal flue ash clearing device, comprising at least one clearing component, the clearing component comprising:
[0006] An ash hopper, the ash hopper is used to be arranged below the position of the horizontal flue where ash is easily accumulated, the top of the ash hopper is open, and the open end of the ash hopper is connected to the ash falling gap opened on the horizontal flue;
[0007] An ash guide pipe, the top of which is connected to the ash hopper, and the bottom of which is used to be connected to an opening at the upper part of the sloped water-cooled wall of the boiler; and
[0008] The baffle is arranged inside the ash guide pipe, and the baffle can open the ash guide pipe when there is settling ash falling, and cut off the ash guide pipe when there is no settling ash falling.
[0009] Optionally, the ash guiding pipe comprises a vertical section and an inclined section which are connected to each other, the vertical section is connected to the bottom of the ash hopper, and the inclined section is used to be connected to an opening at the upper part of the sloped water-cooled wall of the boiler.
[0010] Optionally, the inclination angle of the inclined section is adapted to the inclination angle of the sloped water-cooled wall of the boiler.
[0011] Optionally, a sparse plate is provided at the open end of the ash hopper, an ash passing gap is provided at a position of the sparse plate corresponding to the ash falling gap opened on the horizontal flue, and the ash passing gap is communicated with the open end of the ash hopper.
[0012] Optionally, the horizontal flue settled ash cleaning device includes a support bracket for supporting the ash hopper, and the support bracket is arranged below the horizontal flue.
[0013] Optionally, the horizontal flue ash settling cleaning device comprises a first maintenance platform for supporting the ash guide pipe, the first maintenance platform is arranged close to the ash hopper, and a first isolation valve is arranged on a portion of the ash guide pipe located above the first maintenance platform;
[0014] And / or, the horizontal flue settled ash cleaning device includes a second maintenance platform for supporting the ash guide pipe, the second maintenance platform is arranged away from the ash hopper, and a second isolation valve is provided on the part of the ash guide pipe located above the second maintenance platform.
[0015] Optionally, the horizontal flue settled ash cleaning device further includes a purge pipe, and an outlet of the purge pipe is connected to the ash guiding pipe.
[0016] Optionally, a driving member is connected to the shield, and the shield can be flipped under the action of the driving member;
[0017] Alternatively, an elastic member is connected to the shutter, and the shutter can be flipped over to open the ash guide pipe after receiving a preset weight of settled ash, and the shutter can be reset under the action of the elastic member to cut off the ash guide pipe.
[0018] Optionally, there are multiple cleaning components, and the multiple cleaning components are evenly arranged along the width direction of the horizontal flue;
[0019] And / or, at least one expansion joint is provided on the ash guiding pipe.
[0020] The utility model also provides a coal-fired boiler, comprising:
[0021] Boiler body;
[0022] A horizontal flue is arranged on the boiler body, and a plurality of ash-falling gaps are provided at the bottom of the horizontal flue; and
[0023] The above-mentioned horizontal flue settled ash cleaning device, the open end of the ash hopper of the horizontal flue settled ash cleaning device is connected to the multiple ash falling gaps, and the ash guide pipe of the horizontal flue settled ash cleaning device is connected to the opening on the upper part of the boiler slope water-cooled wall of the boiler body.
[0024] Compared with the prior art, the technical solution provided by the present invention has the following advantages:
[0025] Based on the horizontal flue settled ash cleaning device provided by the utility model, the settled ash in the water-like flue enters the ash hopper through the ash falling gap under the action of its own gravity, and is then transported to the slope water-cooled wall of the boiler through the ash guide pipe, and then enters the furnace to achieve the cleaning of the settled ash in the horizontal flue. Compared with the traditional soot blowing method, the ash hopper is set below the ash-prone position of the horizontal flue, which can ensure the cleaning effect of the settled ash, and there is no need to introduce gas medium, reduce energy consumption, and avoid the phenomenon of cavitation of the pipe wall. The design method of the baffle can ensure the conveying effect of the settled ash while cutting off the ash guide pipe in the non-ash guiding state to ensure the normal use of the boiler. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present utility model, and together with the description, are used to explain the principles of the present utility model.
[0027] In order to more clearly illustrate the implementation mode of the utility model or the technical solution in the prior art, the drawings required for use in the implementation mode or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0028] Figure 1 This is a schematic diagram of the structure of the horizontal flue ash settling cleaning device according to the embodiment of the utility model;
[0029] Figure 2 This is a structural schematic diagram of a horizontal flue dust cleaning device when the cleaning components described in the embodiment of the utility model are multiple;
[0030] Figure 3 This is a schematic diagram of the structure of the coal-fired boiler described in the implementation mode of the utility model.
[0031] Description of Reference Numerals
[0032] 1. Cleaning components; 11. Ash hopper; 12. Ash guide pipe; 121. Vertical section; 122. Inclined section; 123. Expansion joint; 2. Horizontal flue; 3. Boiler slope water-cooled wall; 4. Support and hanger; 5. First maintenance platform; 6. First isolation valve; 7. Second maintenance platform; 8. Second isolation valve; 9. Purge pipeline. DETAILED DESCRIPTION
[0033] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the scheme of the utility model will be further described below. It should be noted that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.
[0034] The following description sets forth many specific details to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; obviously, the implementation methods in the specification are only part of the implementation methods of the present invention, rather than all of the implementation methods.
[0035] Combination Figures 1 to 3 As shown, the horizontal flue ash cleaning device provided by the embodiment of the utility model includes at least one cleaning component 1, that is, the cleaning component 1 can be one or more, which can be selected according to actual needs. The cleaning component 1 includes an ash hopper 11, an ash guide pipe 12 and a shield. The cleaning here refers to cleaning and unblocking.
[0036] The ash hopper 11 is used to be arranged below the position of the horizontal flue 2 where dust is easily accumulated, so that the settled ash can fall into the ash hopper 11, ensuring the cleaning effect of the settled ash. The top of the ash hopper 11 is open, and the open end of the ash hopper 11 is connected to the ash-falling gap opened on the horizontal flue 2, that is, a plurality of ash-falling gaps are opened at the position of the horizontal flue 2 where dust is easily accumulated, and the open end of the ash hopper 11 is covered on the periphery of the plurality of ash-falling gaps, so that the settled ash in the horizontal flue 2 enters the ash hopper 11 through the ash-falling gaps. The top of the ash guide pipe 12 is connected to the ash hopper 11, and the bottom of the ash guide pipe 12 is used to communicate with the opening on the upper part of the boiler slope water-cooled wall 3, that is, the inlet of the ash guide pipe 12 is connected to the outlet of the ash hopper 11, and the inlet of the ash hopper 11 is the inlet of the device, which is used to communicate with the ash-falling gap at the bottom of the horizontal flue 2, and the outlet of the ash guide pipe 12 is the outlet of the device, so that the settled ash in the ash hopper 11 can fall into the position of the boiler slope water-cooled wall 3 through the ash guide pipe 12, and is used to guide the settled ash in the horizontal flue 2 in the furnace to the bottom of the furnace. The shutter is set inside the ash guide pipe 12, and the shutter can open the ash guide pipe 12 when there is settled ash falling, and cut off the ash guide pipe 12 when there is no settled ash falling. That is, under normal conditions, the shutter is set along the cross-sectional direction of the ash guide pipe 12 to cut off the ash guide pipe 12 to ensure the normal use of the boiler. When the ash falls, the shutter flips over so that the ash guide pipe 12 is in an open state for the settled ash to flow.
[0037] Based on the horizontal flue settled ash cleaning device provided by the utility model, the settled ash in the water sample flue enters the ash hopper 11 through the ash falling gap under the action of its own gravity, and is then transported to the boiler slope water-cooled wall 3 through the ash guide pipe 12, and then enters the furnace to achieve the cleaning of the settled ash in the horizontal flue 2. Compared with the traditional soot blowing method, the ash hopper 11 is set below the ash-prone position of the horizontal flue 2, which can ensure the cleaning effect of the settled ash, and there is no need to introduce a gas medium, reduce energy consumption, and avoid the phenomenon of cavitation of the pipe wall. The design method of the baffle can ensure the conveying effect of the settled ash while cutting off the ash guide pipe 12 in the non-ash guiding state to ensure the normal use of the boiler.
[0038] In some embodiments, in combination Figure 1 and Figure 3 As shown, the ash guide pipe 12 includes a vertical section 121 and an inclined section 122 which are connected to each other. The vertical section 121 is connected to the bottom of the ash hopper 11 , and the inclined section 122 is used to be connected to the opening at the upper part of the boiler slope water-cooled wall 3 .
[0039] In this design, the vertical section 121 is used to receive the ash from the ash hopper 11, and the inclined section 122 is used to guide the transportation of the settled ash, so that the settled ash can enter the boiler slope water-cooled wall 3 and then enter the furnace, which is convenient for cleaning and recycling, without the need to use other recycling equipment, thus reducing costs. The design of the vertical section 121 and the inclined section 122 can ensure the transportation effect of the settled ash.
[0040] In some embodiments, the inclination angle of the inclined section 122 is adapted to the inclination angle of the boiler slope water-cooled wall 3. Adaptation here means that the inclination angle of the inclined section 122 is the same as the inclination angle of the boiler slope water-cooled wall 3, so that the conveying direction of the settled ash is parallel to the extension direction of the boiler slope water-cooled wall 3. Or the inclination angle of the inclined section 122 is slightly smaller than the inclination angle of the boiler slope water-cooled wall 3, so that the conveying direction of the settled ash forms an angle with the extension direction of the boiler slope water-cooled wall 3, and the conveying direction of the settled ash is away from the boiler slope water-cooled wall 3.
[0041] Under this design mode, the scouring damage of the discharged sedimentation ash to the boiler slope water-cooled wall 3 can be reduced, thereby ensuring the service life of the boiler slope water-cooled wall 3.
[0042] In some embodiments, a sparse plate is provided at the open end of the ash hopper 11 , and an ash passing gap is provided at a position of the sparse plate corresponding to the ash falling gap opened on the horizontal flue 2 , and the ash passing gap is connected to the open end of the ash hopper 11 .
[0043] In this design, the sparse plate is pre-buried to be rigidly connected to the water-cooled wall at the bottom of the horizontal flue 2, and the edge of the interface is ensured to be completely sealed. The water-cooled wall of the horizontal flue 2 is provided with ash-falling gaps according to the actual size of the ash accumulation area on site. Specifically, several ash-falling gaps are opened by directly cutting the water-cooled wall flat steel at the edge. A large hole is opened in the center of the ash hopper 11. The number and opening positions of the ash-passing gaps on the sparse plate are the same as those of the ash-falling gaps, ensuring that the settled ash falling through the ash-falling gaps can smoothly enter the ash hopper 11.
[0044] In some embodiments, the horizontal flue ash settling cleaning device includes a support bracket 4 for supporting the ash hopper 11, and the support bracket 4 is arranged below the horizontal flue 2. Specifically, the support bracket 4 is arranged at a position close to the lower part of the horizontal flue 2, so that the ash hopper 11 can be fastened by the support bracket 4 to ensure the fixing and supporting effect of the ash hopper 11.
[0045] In some embodiments, the horizontal flue ash settling cleaning device includes a first maintenance platform 5 for supporting the ash guide pipe 12 . The first maintenance platform 5 is arranged close to the ash hopper 11 . A first isolation valve 6 is provided on a portion of the ash guide pipe 12 located above the first maintenance platform 5 .
[0046] In this design, the ash guide pipe 12 can be fixed and supported by the first maintenance platform 5, and the first isolation valve 6 can be a manual isolation valve, which is arranged at a high position of the vertical section 121 of the ash guide pipe 12 and close to the outlet of the ash hopper 11, and is used for temporary isolation and maintenance of the equipment during operation. The first isolation valve 6 is arranged close to the first maintenance platform 5, which is convenient for the staff to step on and convenient for maintenance.
[0047] In some embodiments, the horizontal flue ash settling cleaning device includes a second maintenance platform 7 for supporting the ash guide pipe 12, the second maintenance platform 7 is arranged away from the ash hopper 11, and a second isolation valve 8 is arranged on a portion of the ash guide pipe 12 located above the second maintenance platform 7. The second isolation valve 8 is arranged close to the second maintenance platform 7 for easy maintenance.
[0048] In this design, the ash guide pipe 12 can be fixed and supported by the second maintenance platform 7, and the fixing and supporting effect of the ash guide pipe 12 can be ensured by cooperating with the first maintenance platform 5. The second isolation valve 8 is an electric isolation valve, which is arranged at the tail of the vertical section 121 of the ash guide pipe 12, and is used to control the start and stop action of the ash cleaning and ash discharging device of the present invention, and the power supply is taken from the factory power. The electric isolation valve is opened once every 6 hours. The operating personnel decides the duration of the ash discharging operation based on the boiler load and coal burning conditions 6 hours before the electric isolation valve is opened, and closes the electric isolation valve after completing all ash discharging operations.
[0049] In some embodiments, the horizontal flue ash clearing device further includes a purge pipe 9, the outlet of which is connected to the ash guide pipe 12. Specifically, the purge pipe 9 is arranged on the second maintenance platform 7, and is used to purge the ash guide pipe 12 online, and the compressed air purge pipe gas source is taken from the compressed air main pipe in the factory. In addition, the purge pipe 9 can also provide compressed air when the ash guide pipe 12 is blocked or the ash falling gap is blocked, so as to ensure the transportation of the settled ash.
[0050] In some embodiments, a driving member is connected to the shutter, and the shutter can be turned over under the action of the driving member. In this design, the shutter can be turned over to open the ash guide pipe 12 when conveying settled ash, and can cut off the ash guide pipe 12 in a non-ash-conducting state to ensure the normal use of the boiler. In addition, the shutter can cut off the ash guide pipe 12 together with the electric isolation valve to ensure the isolation effect of the ash guide pipe 12.
[0051] In some embodiments, an elastic member is connected to the shutter, and the shutter can be flipped after receiving a preset weight of settled ash to open the ash guide tube 12, and the shutter can be reset under the action of the elastic member to cut off the ash guide tube 12. Specifically, the elastic member can be a coil spring, which is arranged on one side of the shutter, and can provide a vertical upward elastic force for the shutter. A limit plate is arranged on the side of the shutter away from the coil spring to limit the flipping angle of the shutter, so as to ensure that the shutter can be arranged along the radial direction of the ash guide tube 12 under the action of the elastic force of the coil spring, and the truncation effect of the ash guide tube 12 is ensured.
[0052] In this design, the ash guide pipe 12 can be automatically controlled to be on and off when the electric isolation valve is in the open state. That is, during the conveying process of settled ash, the settled ash falls to the top of the shutter. When the weight of the settled ash falling to the top of the shutter reaches a certain weight, the settled ash will press the shutter to overcome the elastic force of the coil spring to flip and open the ash guide pipe 12, ensuring the conveying of the settled ash. When the falling amount of the settled ash is small or no longer falls, the shutter is in a cut-off state to ensure the normal use of the boiler.
[0053] In some embodiments, Figure 2 As shown, there are multiple cleaning components 1, and the multiple cleaning components 1 are evenly arranged along the width direction of the horizontal flue 2. In this design mode, multiple cleaning components 1 are independently set to reduce the volume of a single cleaning component 1 and increase the convenience of production and transportation. Preferably, there are 6-10 cleaning components 1, and the multiple cleaning components 1 are compactly arranged below the vertical section of the horizontal flue 2 of the boiler.
[0054] In some embodiments, a plurality of cleaning components 1 can be opened independently, so that corresponding cleaning components 1 can be opened according to the accumulation of settled ash at corresponding positions to ensure the conveying effect of the settled ash.
[0055] In some embodiments, at least one expansion joint 123 is provided on the ash guide pipe 12. There may be multiple expansion joints 123, and the multiple expansion joints 123 are evenly distributed on the ash guide pipe 12, so that the multiple expansion joints 123 are connected in series on the ash guide pipe 12. Specifically, the vertical section 121 and the inclined section 122 of the ash guide pipe 12 are both provided with expansion joints 123. The expansion joint 123 can compensate for the axial, lateral and angular displacement of the pipeline caused by temperature changes, mechanical vibrations or other external factors. The expansion joint 123 isolates the ash guide pipe 12 from the boiler body into two different independent expansion systems, ensuring the normal use of the ash guide pipe 12.
[0056] In some embodiments, the pipe material of the ash guide pipe 12 of the present application needs to be selected in a stepwise manner, that is, the pipe material between the connection between the ash guide pipe 12 and the ash hopper 11 and the second isolation valve 8 is selected from heat-resistant steel, such as SA-213TP304H steel, and the pipe material below the second isolation valve 8 is selected from low-alloy steel, such as 15CrMo. Correspondingly, the thickness of the heat preservation and anti-scalding layer of different pipe sections is successively thinned from top to bottom, and the pipe diameter is 20 to 30CM.
[0057] The ash guide pipe 12 designed in this way can ensure its own structural strength while meeting the transportation requirements of the settled ash.
[0058] In some embodiments, the outer wall of the ash hopper 11 is provided with a reinforcing rib plate. Under this design, the inherent strength of the ash hopper 11 can be increased.
[0059] In some embodiments, the distance between the outlet of the ash hopper 11 and the first isolation valve 6 is smaller than the distance between the first isolation valve 6 and the second isolation valve 8. In this design, the first isolation valve 6 can cut off the falling of the settled ash from the entrance of the ash guide pipe 12, and the second isolation valve 8 is far away from the first isolation valve 6, so that the first isolation valve 6 and the second isolation valve 8 act independently to avoid overlapping.
[0060] When the horizontal flue ash settling cleaning device provided in the present application is not in use, the ash conveying bypass can be closed by closing the first isolation valve 6 or the second isolation valve 8. The operation is simple and the safety of the unit operation is improved.
[0061] This application can keep the original system process unchanged and automatically control the generator set through the DCS integrated coordinated control system. After the transformation, only the automatic function of the electric isolation valve is added, which hardly affects the original control logic and system, and does not change the original operating logic and operating habits.
[0062] like Figure 3As shown, the utility model also provides a coal-fired boiler, which includes a boiler body, a horizontal flue 2 and the above-mentioned horizontal flue sedimentation ash cleaning device, and the horizontal flue sedimentation ash cleaning device here includes all the technical features of the above-mentioned horizontal flue sedimentation ash cleaning device.
[0063] The horizontal flue 2 is arranged on the boiler body, and a plurality of ash-falling gaps are provided at the bottom of the horizontal flue 2, wherein a plurality of ash-falling gaps are provided at positions where ash is easily accumulated in the horizontal flue 2. The open end of the ash hopper 11 of the horizontal flue ash settling cleaning device is connected to the plurality of ash-falling gaps, and the ash guide pipe 12 of the horizontal flue ash settling cleaning device is connected to the opening at the upper portion of the boiler slope water-cooled wall 3 of the boiler body.
[0064] The coal-fired boiler under this design method can improve the boiler ash cleaning and ash removal capacity during the operation of the unit. The settled ash in the horizontal flue 2 is cleaned and unblocked in time, avoiding overheating and deformation of the heating surface pipe, reducing the maintenance cost of the enterprise, improving the operation reliability of the unit, and improving the adaptability of the unit to different coal qualities.
[0065] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.
[0066] The above description is only a specific embodiment of the utility model, so that those skilled in the art can understand or implement the utility model. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to these embodiments described herein, but should conform to the widest scope consistent with the principles and novel features of the utility model described herein.
Claims
1. A horizontal flue ash cleaning device, characterized in that: The invention comprises at least one clearing assembly (1), wherein the clearing assembly (1) comprises: An ash hopper (11), the ash hopper (11) is used to be arranged below a position of the horizontal flue (2) where ash is easily accumulated, the top of the ash hopper (11) is open, and the open end of the ash hopper (11) is connected to an ash-falling gap opened on the horizontal flue (2); an ash guide pipe (12), the top of which is in communication with the ash hopper (11), and the bottom of which is in communication with an opening at the top of the boiler slope water-cooled wall (3); and A baffle is arranged inside the ash guide pipe (12), and the baffle can open the ash guide pipe (12) when settled ash falls, and cut off the ash guide pipe (12) when no settled ash falls.
2. The horizontal flue ash cleaning device according to claim 1 is characterized in that: The ash guide pipe (12) comprises a vertical section (121) and an inclined section (122) which are connected to each other. The vertical section (121) is connected to the bottom of the ash hopper (11), and the inclined section (122) is used to be connected to an opening at the upper part of the boiler slope water-cooled wall (3).
3. The horizontal flue ash cleaning device according to claim 2 is characterized in that: The inclination angle of the inclined section (122) is adapted to the inclination angle of the boiler slope water-cooled wall (3).
4. The horizontal flue ash cleaning device according to claim 1 is characterized in that: The open end of the ash hopper (11) is provided with a sparse plate, and an ash passing gap is provided at a position of the sparse plate corresponding to the ash falling gap opened on the horizontal flue (2), and the ash passing gap is connected to the open end of the ash hopper (11).
5. The horizontal flue ash cleaning device according to claim 1 is characterized in that: The horizontal flue ash settling cleaning device comprises a support bracket (4) for supporting the ash hopper (11), and the support bracket (4) is arranged below the horizontal flue (2).
6. The horizontal flue ash cleaning device according to claim 1 is characterized in that: The horizontal flue ash settling cleaning device comprises a first maintenance platform (5) for supporting the ash guide pipe (12), the first maintenance platform (5) being arranged close to the ash hopper (11), and a first isolation valve (6) being arranged on a portion of the ash guide pipe (12) located above the first maintenance platform (5); And / or, the horizontal flue ash settling cleaning device comprises a second maintenance platform (7) for supporting the ash guide pipe (12), the second maintenance platform (7) is arranged away from the ash hopper (11), and a second isolation valve (8) is provided on the part of the ash guide pipe (12) located above the second maintenance platform (7).
7. The horizontal flue ash cleaning device according to claim 1 is characterized in that: The horizontal flue ash settling cleaning device further comprises a purge pipe (9), the outlet of the purge pipe (9) being in communication with the ash guide pipe (12).
8. The horizontal flue ash cleaning device according to claim 1 is characterized in that: The shield is connected to a driving member, and the shield can be turned over under the action of the driving member; Alternatively, an elastic member is connected to the shutter, and the shutter can flip over to open the ash guide pipe (12) after receiving a preset weight of settled ash, and the shutter can be reset under the action of the elastic member to cut off the ash guide pipe (12).
9. The horizontal flue ash cleaning device according to claim 1 is characterized in that: There are a plurality of cleaning components (1), and the plurality of cleaning components (1) are evenly arranged along the width direction of the horizontal flue (2); And / or, at least one expansion joint (123) is provided on the ash guiding pipe (12).
10. A coal-fired boiler, characterized in that: include: Boiler body; A horizontal flue (2) is arranged on the boiler body, and a plurality of ash-falling gaps are provided at the bottom of the horizontal flue (2); as well as The horizontal flue settled ash cleaning device as described in any one of claims 1 to 9, wherein the open end of the ash hopper (11) of the horizontal flue settled ash cleaning device is connected to the plurality of ash falling gaps, and the ash guide pipe (12) of the horizontal flue settled ash cleaning device is connected to the opening on the upper portion of the boiler slope water-cooled wall (3) of the boiler body.