CN113819473A - Ash blockage preventing device for ash bucket under convection tube bundle of boiler - Google Patents
Ash blockage preventing device for ash bucket under convection tube bundle of boiler Download PDFInfo
- Publication number
- CN113819473A CN113819473A CN202111112925.1A CN202111112925A CN113819473A CN 113819473 A CN113819473 A CN 113819473A CN 202111112925 A CN202111112925 A CN 202111112925A CN 113819473 A CN113819473 A CN 113819473A
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- Prior art keywords
- ash
- air
- boiler
- exhaust
- fluidization
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Links
- 238000005243 fluidization Methods 0.000 claims abstract description 37
- 238000007664 blowing Methods 0.000 claims abstract description 14
- 238000004140 cleaning Methods 0.000 claims abstract description 8
- 230000005484 gravity Effects 0.000 claims abstract description 6
- 239000002956 ash Substances 0.000 claims description 80
- 239000010881 fly ash Substances 0.000 claims description 12
- 230000002265 prevention Effects 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 3
- 235000008331 Pinus X rigitaeda Nutrition 0.000 claims 1
- 235000011613 Pinus brutia Nutrition 0.000 claims 1
- 241000018646 Pinus brutia Species 0.000 claims 1
- 230000008021 deposition Effects 0.000 abstract 2
- 238000010586 diagram Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 239000000428 dust Substances 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J3/00—Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers
- F23J3/02—Cleaning furnace tubes; Cleaning flues or chimneys
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J3/00—Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers
- F23J3/04—Traps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
The invention provides an anti-blocking ash device for an ash bucket under a boiler convection tube bundle, which comprises a blowing structure and an ash collection box communicated and connected with the bottom of a boiler body, wherein the bottom of the ash collection box is communicated and provided with a plurality of ash discharge pipes, and each ash discharge pipe is provided with a gravity valve; the blowing structure comprises an air cannon and a plurality of exhaust fluidization air caps, each ash discharge pipe is internally provided with an exhaust fluidization air cap, the exhaust fluidization air caps are positioned above the top ends of the ash discharge pipes, the bottom of each exhaust fluidization air cap is communicated with an air supply pipe, the air supply pipe penetrates through the side wall of each ash discharge pipe, the plurality of air supply pipes are communicated with a collecting pipe, the air inlet of each collecting pipe is communicated with the air outlet of the air cannon, air flow supplied by the air cannon is ejected out through the exhaust fluidization air caps, and high-pressure air flow is used for cleaning the top ends of the ash discharge pipes; its novel structure, accessible jetting high-pressure draught's mode is spouted the deposition and is blown the clearance, discharge with higher speed, effectively prevents the long-time stacking bridge of deposition, avoids influencing the normal work efficiency of boiler.
Description
Technical Field
The invention relates to the field of anti-blocking structures, in particular to an anti-blocking ash device for an ash bucket under a boiler convection bank.
Background
The convection bank is arranged between an upper boiler barrel and a lower boiler barrel of the chain boiler, flue gas flows to exchange heat with the outer wall of the convection bank, furnace water in the heating pipe is heated, and meanwhile fly ash in the flue gas is accumulated outside the convection bank. Because the temperature of the fly ash is high, the surface of the tail ash collecting hopper needs to be coated with refractory castable, so that the fly ash has poor sliding property on the surface of the refractory material, a bridge is easily accumulated at the cone opening of the tail ash collecting hopper, and the fly ash reaches a certain height to bury part of convection tube bundles, thereby influencing heat transfer and reducing boiler efficiency. In order to ensure the maximum efficient utilization of heat energy, the boiler needs to be shut down periodically for manual cleaning, but the manual cleaning has high labor intensity, and fly ash in the boiler site is easy to scatter, so that the environment is polluted.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to solve the technical problem of providing the ash blockage prevention device for the ash bucket under the convection tube bundle of the boiler, which has a novel structure, can perform blowing cleaning and accelerated discharge on accumulated ash in a high-pressure air flow blowing mode, effectively prevents the accumulated ash from being stacked and bridged for a long time, and avoids influencing the normal working efficiency of the boiler.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides an anti-blocking ash device for an ash bucket under a boiler convection tube bundle, which comprises a blowing structure and an ash collection box communicated and connected with the bottom of a boiler body, wherein the bottom of the ash collection box is communicated and provided with a plurality of ash discharge pipes, and each ash discharge pipe is provided with a gravity valve; the jetting structure comprises an air cannon and a plurality of exhaust fluidization air caps, each ash discharge pipe is internally provided with an exhaust fluidization air cap, the exhaust fluidization air caps are positioned above the top ends of the ash discharge pipes, an air supply pipe is communicated with the bottom of the exhaust fluidization air caps and penetrates through the side walls of the ash discharge pipes, the air supply pipes are communicated with a collecting pipe, the air inlet of the collecting pipe is communicated with the air outlet of the air cannon, air flow fed by the air cannon is ejected through the exhaust fluidization air caps, high-pressure air flow is used for cleaning ash on the top ends of the ash discharge pipes, and fluidized fly ash is formed above the exhaust fluidization air caps to prevent stacking bridges.
In a preferred technical scheme of the invention, the top end of the ash discharge pipe is in a cone-bucket-shaped structure.
In a preferred technical scheme of the invention, the exhaust fluidization hood comprises a first hood body and a second hood body, wherein the first hood body is positioned above the second hood body, and the first hood body and the second hood body are spliced to form a spherical structure; the bottom end of the second cover body is communicated with an air inlet pipe, and the air inlet pipe is in threaded connection and matching with the top end of the air supply pipe; a support rod is fixedly arranged inside the first cover body, a support is erected at the top of the second cover body, a bearing is arranged in the middle of the support, and the bottom end of the support rod is clamped on the bearing; the first cover body can rotate around the axis of the bearing; the lateral wall of the first cover body is provided with a plurality of layers of first air outlet holes, the plurality of first air outlet holes on the same layer are distributed in a circumferential array mode around the supporting rod, the axes of the first air outlet holes are not parallel to the axis of the supporting rod, the air outlets of the first air outlet holes are arranged downwards and incline in a clockwise or anticlockwise unified mode, and high-pressure air flow is sprayed out through the first air outlet holes and can drive the first cover body to rotate.
In a preferred technical scheme of the invention, a limiting ring and a clamping groove are fixedly arranged on the side wall of the bottom of the supporting rod, the clamping groove is positioned below the limiting ring, when the bottom of the supporting rod penetrates through the bearing, the limiting ring is abutted against the top surface of the bearing, the clamping groove is positioned below the bearing, and a clamp spring is arranged at the clamping groove and used for preventing the bottom end of the supporting rod from loosening from the bearing.
In a preferred technical scheme of the invention, the side wall of the second cover body is provided with a plurality of layers of second air outlet holes, the plurality of second air outlet holes in the same layer are distributed in a circumferential array around the axis of the air inlet pipe, the axes of the second air outlet holes are all communicated with the spherical center point of the second cover body, and the second air outlet holes are all blown downwards.
In a preferred technical scheme of the invention, a convex ring is fixedly arranged on the inner wall of the bottom end of the first cover body, a groove is fixedly arranged on the inner wall of the top of the second cover body, and the groove is matched with the convex ring in shape and is in inserted connection and rotating fit.
In a better technical scheme of the invention, a notch is formed in the side wall of the ash discharge pipe, the width of the notch is larger than the diameter of the exhaust fluidization hood, a baffle is arranged on the outer side of the notch, the baffle blocks the notch, and the air supply pipe penetrates through the baffle and is welded at the penetrating connection position in a sealing manner.
In a preferred technical scheme of the invention, a manual valve and an electromagnetic valve are sequentially arranged on the collecting pipe along the conveying direction.
The invention has the beneficial effects that:
the invention provides an ash blockage preventing device for an ash bucket under a boiler convection tube bundle, which is novel in structure, an air cannon in a blowing structure can provide instantaneous high-pressure airflow, the airflow fed by the air cannon enters the interior of an ash discharge pipe and is ejected by an exhaust fluidization hood, the high-pressure airflow effectively impacts and blows the top end of the ash discharge pipe, deposited ash is promoted to fall and be discharged at an accelerated speed, fly ash can be maintained in a fluidization state, the deposited ash is effectively prevented from being accumulated and bridged for a long time, and the normal working efficiency of the boiler is prevented from being influenced.
Drawings
FIG. 1 is a schematic view of an ash blocking prevention device for an ash hopper under a convection bank of a boiler according to an embodiment of the present invention;
FIG. 2 is a side view of the embodiment of the present invention illustrating the positioning of the ash discharge pipe and the exhaust fluidization hood;
FIG. 3 is a schematic structural diagram illustrating an exhaust fluidization hood in accordance with an exemplary embodiment of the present invention;
FIG. 4 is a schematic structural diagram illustrating a first cover according to an embodiment of the present invention;
FIG. 5 is a schematic gas injection diagram illustrating the first shroud in an embodiment of the present invention;
fig. 6 is a schematic structural diagram disclosing a second cover in a specific embodiment of the present invention.
In the figure:
100. a blowing structure; 110. an air cannon; 120. a gas supply pipe; 130. a collector pipe; 140. a baffle plate; 150. a manual valve; 160. an electromagnetic valve; 200. a dust collection box; 300. an ash discharge pipe; 310. a notch; 400. a gravity valve; 500. an exhaust fluidization hood; 510. a first cover body; 511. a support bar; 512. a first air outlet hole; 513. a limiting ring; 514. a card slot; 520. a second cover body; 521. an air inlet pipe; 522. a bearing; 523. a second air outlet; 530. a convex ring; 540. a groove; 600. a boiler body.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
As shown in fig. 1 to 6, in the embodiment of the present invention, an ash blockage preventing device for an ash bucket under a boiler convection bank is disclosed, which comprises a blowing structure 100, an ash collecting box 200 connected to the bottom of a boiler body, a plurality of ash discharging pipes 300 connected to the bottom of the ash collecting box 200, and a gravity valve 400 installed on each ash discharging pipe 300;
the blowing structure 100 comprises an air cannon 110 and a plurality of exhaust fluidization hoods 500, each ash discharge pipe 300 is internally provided with the exhaust fluidization hood 500, the exhaust fluidization hoods 500 are positioned above the top end of the ash discharge pipe 300, the bottom of each exhaust fluidization hood 500 is communicated with an air supply pipe 120, the air supply pipe 120 penetrates through the side wall of the ash discharge pipe 300, the air supply pipes 120 are communicated with a collecting pipe 130, an air inlet of the collecting pipe 130 is communicated with an air outlet of the air cannon 110, air flow supplied by the air cannon 110 is sprayed out through the exhaust fluidization hoods 500, high-pressure air flow is used for cleaning ash at the top end of the ash discharge pipe 300, and fluidized fly ash is formed above the exhaust fluidization hoods to prevent bridging.
The anti-blocking device for the ash bucket under the convection tube bundle of the boiler is novel in structure, the air cannon in the injection structure can provide instantaneous high-pressure airflow, the airflow fed by the air cannon enters the ash discharge pipe and is injected out through the exhaust fluidization hood, and the high-pressure airflow effectively impacts and injects the top end of the ash discharge pipe to promote the falling and accelerated discharge of accumulated ash, so that fly ash can be maintained in a fluidization state, the long-time accumulation and bridging of the accumulated ash can be effectively prevented, and the normal working efficiency of the boiler is prevented from being influenced; the gravity valve is designed to facilitate the ash collection to fall and be discharged after reaching the opening weight, and the use and the operation are convenient.
Further, the top end of the ash discharge pipe 300 is in a cone-bucket structure, so that the fly ash can move towards the ash discharge pipe.
Further, as shown in fig. 3 to 6, the exhaust fluidization hood 500 includes a first hood 510 and a second hood 520, the first hood 510 is located above the second hood 520, and the first hood 510 and the second hood 520 are spliced to form a spherical structure; the bottom end of the second cover body 520 is communicated with an air inlet pipe 521, and the air inlet pipe 521 is in threaded connection and matching with the top end of the air supply pipe 120; a support rod 511 is fixedly arranged inside the first cover body 510, a support is erected at the top of the second cover body 520, a bearing 522 is arranged in the middle of the support, and the bottom end of the support rod 511 is clamped on the bearing 522; the first cover 510 can rotate around the axis of the bearing 522; the side wall of the first cover body 510 is provided with a plurality of layers of first air outlet holes, the plurality of first air outlet holes 512 in the same layer are distributed in a circumferential array around the support rod 511, the axes of the first air outlet holes 512 are not all connected with the axis of the support rod 511, the air outlets of the first air outlet holes 512 are arranged downwards and uniformly inclined in a clockwise or anticlockwise direction, as shown in fig. 5, high-pressure air flow is ejected through the first air outlet holes 512 to form clockwise blowing air flow, and the first cover body 510 can be driven to rotate anticlockwise; in the rotating process, the blowing area can be enlarged, and more dust-deposition areas are covered, so that the dust-cleaning effect is further enhanced; in addition, the ejected airflow can form rotational flow to promote the fly ash to form a fluidized state, thereby further preventing the accumulation and bridging; it should be noted that, when the first air outlet is arranged in the opposite direction, the blowing air flow in the counterclockwise direction is formed, and the first cover 510 can be driven to rotate clockwise, so that the effect is the same.
Furthermore, a limiting ring 513 and a clamping groove 514 are fixedly arranged on the side wall of the bottom of the supporting rod 511, the clamping groove 514 is positioned below the limiting ring 513, when the bottom of the supporting rod 511 penetrates through the bearing 522, the limiting ring 513 abuts against the top surface of the bearing 522, the clamping groove 514 is positioned below the bearing 522, a clamping spring is arranged at the clamping groove 514 and used for preventing the bottom end of the supporting rod 511 from loosening from the bearing 522; this structural design can make things convenient for bracing piece bottom and bearing to carry out the cooperation of rotation joint, prevents to take place to loosen and take off at high-pressure draught impact or first cover body pivoted in-process.
Further, the lateral wall of the second cover body 520 is provided with a plurality of layers of second air outlets, the plurality of second air outlets 523 in the same layer are distributed in a circumferential array mode around the axis of the air inlet pipe 521, the axis of the second air outlets 523 is equal to the spherical center point of the second cover body 520, the direction of the second air outlets is inclined, the second air outlets 523 are blown downwards, the dust discharging pipe is better matched with the conical hopper-shaped structure at the top of the dust discharging pipe, the better blowing impacts the inner wall of the hopper-shaped part, and the ash removal is accelerated.
Further, the inner wall of the bottom end of the first cover 510 is fixedly provided with a convex ring 530, the inner wall of the top of the second cover 520 is fixedly provided with a groove 540, the groove 540 is matched with the convex ring 530 in shape and is in inserted connection and rotation fit, the structural design can further enhance the connection between the first cover and the second cover, enhance the rotation fit, and also prevent the exhaust from the connection.
Further, a notch 310 is formed in the side wall of the ash discharge pipe 300, the width of the notch 310 is greater than the diameter of the exhaust fluidization hood 500, a baffle 140 is installed outside the notch 310, the notch 310 is sealed by the baffle 140, and the air supply pipe 120 penetrates through the baffle 140 and is welded at the penetrating connection position in a sealing manner; this structural design can conveniently be to the dismouting of exhaust fluidization hood to overhaul or replace.
Further, a manual valve 150 and a solenoid valve 160 are sequentially installed on the manifold 130 along the conveying direction, compressed air is remotely controlled to enter through the solenoid valve, and the manual valve is used for temporary adjustment when the solenoid valve is remotely controlled to fail.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention. The present invention is not to be limited by the specific embodiments disclosed herein, and other embodiments that fall within the scope of the claims of the present application are intended to be within the scope of the present invention.
Claims (8)
1. The utility model provides a prevent stifled grey device that is used for ash bucket under boiler convection bank which characterized in that:
the boiler comprises a blowing structure and an ash collection box communicated and connected with the bottom of a boiler body, wherein the bottom of the ash collection box is communicated and provided with a plurality of ash discharge pipes, and each ash discharge pipe is provided with a gravity valve;
the jetting structure comprises an air cannon and a plurality of exhaust fluidization air caps, each ash discharge pipe is internally provided with an exhaust fluidization air cap, the exhaust fluidization air caps are positioned above the top ends of the ash discharge pipes, an air supply pipe is communicated with the bottom of the exhaust fluidization air caps and penetrates through the side walls of the ash discharge pipes, the air supply pipes are communicated with a collecting pipe, the air inlet of the collecting pipe is communicated with the air outlet of the air cannon, air flow fed by the air cannon is ejected through the exhaust fluidization air caps, high-pressure air flow is used for cleaning ash on the top ends of the ash discharge pipes, and fluidized fly ash is formed above the exhaust fluidization air caps to prevent stacking bridges.
2. The ash blockage prevention device for the ash bucket under the convection bank of the boiler as claimed in claim 1, wherein:
the top end of the ash discharge pipe is in a cone-shaped structure.
3. An ash blockage prevention device for an ash bucket under a convection bank of a boiler, according to claim 2, characterized in that:
the exhaust fluidization hood comprises a first hood body and a second hood body, the first hood body is positioned above the second hood body, and the first hood body and the second hood body are spliced to form a spherical structure; the bottom end of the second cover body is communicated with an air inlet pipe, and the air inlet pipe is in threaded connection and matching with the top end of the air supply pipe;
a support rod is fixedly arranged inside the first cover body, a support is erected at the top of the second cover body, a bearing is arranged in the middle of the support, and the bottom end of the support rod is clamped on the bearing; the first cover body can rotate around the axis of the bearing;
the lateral wall of the first cover body is provided with a plurality of layers of first air outlet holes, the plurality of first air outlet holes on the same layer are distributed in a circumferential array mode around the supporting rod, the axes of the first air outlet holes are not parallel to the axis of the supporting rod, the air outlets of the first air outlet holes are arranged downwards and incline in a clockwise or anticlockwise unified mode, and high-pressure air flow is sprayed out through the first air outlet holes and can drive the first cover body to rotate.
4. An ash blockage prevention device for an ash bucket under a convection bank of a boiler, according to claim 2, characterized in that:
the fixed spacing ring and the draw-in groove of being equipped with of bottom lateral wall of bracing piece, the draw-in groove is located the below of spacing ring, and when the bottom of bracing piece was run through the bearing, the spacing ring supported and was held in the top surface of bearing, and the draw-in groove is located the below of bearing, and draw-in groove department installs the jump ring, the jump ring is used for preventing the bottom of bracing piece from taking off from the bearing pine.
5. An ash blockage prevention device for an ash bucket under a convection bank of a boiler, according to claim 2, characterized in that:
the side wall of the second cover body is provided with a plurality of layers of second air outlet holes, the plurality of second air outlet holes in the same layer are distributed in a circumferential array mode around the axis of the air inlet pipe, the axes of the second air outlet holes are all located at the center of the sphere of the second cover body, and the second air outlet holes are all blown downwards.
6. An ash blockage prevention device for an ash bucket under a convection bank of a boiler, according to claim 2, characterized in that:
the bottom inner wall of the first cover body is fixedly provided with a convex ring, the top inner wall of the second cover body is fixedly provided with a groove, and the groove is matched with the convex ring in shape and is in inserting and rotating fit.
7. The ash blockage prevention device for the ash bucket under the convection bank of the boiler as claimed in claim 1, wherein:
the notch has been seted up to the lateral wall of ash discharge pipe, and the width of notch is greater than the diameter of exhaust fluidization hood, and the baffle is installed in the outside of notch, and the baffle carries out the shutoff to the notch, and the air supply pipe runs through the baffle, just in the sealing weld of through connection department.
8. The ash blockage prevention device for the ash bucket under the convection bank of the boiler as claimed in claim 1, wherein:
and a manual valve and an electromagnetic valve are sequentially arranged on the collecting pipe along the conveying direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111112925.1A CN113819473B (en) | 2021-09-18 | 2021-09-18 | Anti-ash blocking device for ash hopper under convection tube bundle of boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111112925.1A CN113819473B (en) | 2021-09-18 | 2021-09-18 | Anti-ash blocking device for ash hopper under convection tube bundle of boiler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113819473A true CN113819473A (en) | 2021-12-21 |
| CN113819473B CN113819473B (en) | 2024-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111112925.1A Active CN113819473B (en) | 2021-09-18 | 2021-09-18 | Anti-ash blocking device for ash hopper under convection tube bundle of boiler |
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| Publication number | Publication date |
|---|---|
| CN113819473B (en) | 2024-01-26 |
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