CN212408703U - Ash conveying device for boiler flue - Google Patents
Ash conveying device for boiler flue Download PDFInfo
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- CN212408703U CN212408703U CN202021013738.9U CN202021013738U CN212408703U CN 212408703 U CN212408703 U CN 212408703U CN 202021013738 U CN202021013738 U CN 202021013738U CN 212408703 U CN212408703 U CN 212408703U
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- bin
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- flue
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- 239000000428 dust Substances 0.000 claims abstract description 51
- 230000008021 deposition Effects 0.000 claims abstract description 43
- 238000003860 storage Methods 0.000 claims description 18
- 238000011144 upstream manufacturing Methods 0.000 claims description 8
- 238000005243 fluidization Methods 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 230000001276 controlling effect Effects 0.000 claims description 2
- 239000007789 gas Substances 0.000 abstract description 24
- 238000009825 accumulation Methods 0.000 abstract description 14
- 230000002829 reductive effect Effects 0.000 abstract description 10
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 6
- 239000003546 flue gas Substances 0.000 abstract description 6
- 230000036961 partial effect Effects 0.000 abstract description 2
- 238000000926 separation method Methods 0.000 abstract description 2
- 239000002245 particle Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 239000003500 flue dust Substances 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 239000004071 soot Substances 0.000 description 2
- 239000010866 blackwater Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses an defeated grey device for boiler flue belongs to boiler corollary equipment technical field, and it includes: the ash accumulation bin A is arranged at the bottom of the flue in a conduction mode, a baffle is arranged in the flue above the ash accumulation bin A, and the ash accumulation bin A is divided into two chambers through a filter screen; the first dust collecting bin B and the second dust collecting bin B are respectively arranged at the bottoms of the two chambers of the dust collecting bin A in a conducting manner; the first bin pump and the second bin pump are used for conveying the furnace dust in the first dust deposition bin B and the second dust deposition bin B through pneumatic power. The utility model realizes the preliminary separation of the furnace dust from the flue gas and reduces the load of the dust remover by arranging the clapboard and the filter screen in the flue; through first storehouse pump and second storehouse pump series connection, partial valve and pipe fitting have been shared, the cost is reduced to rationally utilize compressed gas, reduced the gas consumption.
Description
Technical Field
The utility model relates to an ash conveying device for boiler flue belongs to boiler corollary equipment technical field.
Background
After the pulverized coal boiler is operated for a long time, a large amount of dust can be attached to and accumulated in the parts of a hearth, a superheater, an economizer, an air preheater and the like which are in contact with smoke, so that the heat exchange effect of the boiler is influenced, the smoke exhaust temperature can be increased, and the electrical load of the induced draft fan is greatly increased. In order to ensure that the heat exchange surface of the boiler is clean so as to improve the heat exchange efficiency, avoid the overtemperature of heat exchange equipment and improve the energy utilization rate, the pulverized coal fired boiler is generally matched with a plurality of sets of steam soot blowers and sound wave soot blowers in a hearth, a superheater area, an economizer area, an air preheater area and a denitration area so as to ensure the safe operation of the boiler. However, the blown-down ash tends to accumulate a large amount of ash due to gravity during the transportation process, especially at the bottom of the flue between the outlet of the flue of the boiler and the dust removing device. Because the density of furnace dust is small, the operation space of dust deposition equipment is extremely small, the manual and mechanical cleaning is very difficult, the environmental pollution is serious, the influence on the occupational health and health of personnel is prominent, and if a water washing method is adopted, a large amount of black water can be generated and cannot be treated. On the other hand, the furnace dust is discharged from the flue and then is conveyed to the dust removal equipment to be separated, the flue dust is purified and then is discharged into the atmosphere, the load of the dust remover can be increased when the furnace dust is carried in the flue gas in a large quantity, and the maintenance cost of the dust remover is increased.
The above description is included in the technical recognition scope of the inventors, and does not necessarily constitute the prior art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to solve the problem that prior art exists, provide an ash conveying device for boiler flue, ash conveying process is high-efficient, safe, environmental protection to can reduce the load of dust remover, reduce the gas consumption, reduce cost.
The utility model discloses an adopt following technical scheme to realize above-mentioned purpose:
an ash transport device for a boiler flue, comprising:
the dust collecting bin A is arranged at the bottom of the flue in a conduction mode, a baffle facing the airflow direction is arranged in the flue above the dust collecting bin A, the dust collecting bin A is divided into two chambers located at the upstream and the downstream of the airflow through a filter screen, and the top of the filter screen is connected with the bottom of the baffle;
the first dust collecting bin B and the second dust collecting bin B are respectively arranged at the bottoms of the two chambers of the dust collecting bin A in a conducting manner;
the first bin pump and the second bin pump are respectively communicated and arranged below the first ash deposition bin B and the second ash deposition bin B and are used for pneumatically conveying furnace ash in the first ash deposition bin B and the second ash deposition bin B.
Optionally, the baffle is provided with a through hole, and the aperture of the through hole is smaller than the aperture of the mesh of the filter screen.
Optionally, the shape of the ash accumulation bin a, the first ash accumulation bin B and the second ash accumulation bin B is a bucket shape with a thick upper part and a thin lower part.
Optionally, the top of the baffle and the top of the screen are both inclined towards the upstream of the airflow.
Optionally, the first bin pump and the second bin pump both include a bin body, a discharge valve arranged at the top of the bin body, an exhaust pipe arranged at the upper part of the bin body in a communicating manner, and fluidization chambers arranged at the bottom of the bin body in a communicating manner, each fluidization chamber is provided with an air inlet pipe and an ash conveying pipe in a communicating manner, the air inlet pipe of the first bin pump is communicated with the compressed gas storage tank, and the ash conveying pipe of the first bin pump is communicated with the air inlet pipe of the second bin pump;
and the blanking valve is respectively used for controlling the conduction of the first dust deposition bin B and the first bin pump and the conduction of the second dust deposition bin B and the second bin pump.
Optionally, the ash conveying device for the boiler flue further comprises an air supply pipeline, one end of the air supply pipeline is communicated with the compressed gas storage tank, the other end of the air supply pipeline is respectively communicated with the ash conveying pipes of the first bin pump and the second bin pump, and a check valve is arranged on the air supply pipeline.
Optionally, the exhaust pipes of the first bin pump and the second bin pump are communicated with the flue.
Optionally, the ash conveying device for the boiler flue further comprises an ash storage, and the ash conveying pipe of the second bin pump is communicated with the ash storage.
Optionally, the air inlet pipe of the first bin pump and the air supply pipeline are both provided with pressure regulating valves.
Benefits of the present application include, but are not limited to:
according to the flue dust collector, the partition plate and the filter screen are arranged in the flue, so that the primary separation of the furnace dust from the flue gas is realized, and the load of the dust collector is reduced; the separated furnace ash is conveyed to an ash storehouse through a first storehouse pump and a second storehouse pump, and compared with manual mechanical cleaning, the method is more efficient, safer and more environment-friendly; through first storehouse pump and second storehouse pump series connection, partial valve and pipe fitting have been shared, the cost is reduced to rationally utilize compressed gas, reduced the gas consumption.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a schematic structural view of an ash conveying device for a boiler flue according to the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1;
100 in the figure, an ash chamber A; 210. a first dust accumulation bin B; 220. a second dust accumulation bin B; 310. a first bin pump; 320. a second bin pump; 301. a bin body; 302. a discharge valve; 303. an exhaust pipe; 304. a fluidizing chamber; 305. an air inlet pipe; 306. an ash conveying pipe; 307. a compressed gas storage tank; 410. a baffle plate; 420. filtering with a screen; 500. a gas supply pipeline; 600. a dust storehouse.
Detailed Description
In order to clearly illustrate the technical features of the present invention, the present invention is explained in detail by the following embodiments in combination with the accompanying drawings.
It should be noted that in the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those described herein. Accordingly, the scope of the present invention is not limited by the specific embodiments disclosed below.
As shown in fig. 1 and 2, the present application discloses an ash conveying apparatus for a boiler flue, which includes an ash storage bin a 100, a first ash storage bin B210 and a second ash storage bin B220 connected to the boiler flue, and a first bin pump 310 and a second bin pump 320.
The ash deposition bin A100 is arranged at the bottom of the flue in a conduction mode, and a baffle 410 facing to the airflow direction is arranged in the flue above the ash deposition bin A100, so that the airflow in the flue rushes to the baffle 410 to change the flowing direction; a filter screen 420 is arranged in the ash deposition bin A100 and is divided into two chambers positioned at the upstream and the downstream of the airflow by the filter screen 420, and the top of the filter screen 420 is connected with the bottom of the baffle plate 410; the first ash deposition bin B210 and the second ash deposition bin B220 are respectively communicated and arranged at the bottoms of the two chambers of the ash deposition bin A100;
the first bin pump 310 and the second bin pump 320 are respectively arranged below the first ash deposition bin B210 and the second ash deposition bin B220 in a conducting manner and are used for pneumatically conveying the furnace ash in the first ash deposition bin B210 and the second ash deposition bin B220.
When the boiler works, the discharged flue gas airflow rushes to the baffle plate 410 and then turns, the cross section area of the flow channel at the ash deposition bin A100 is increased, so that the flow speed of the flue gas is reduced, large-particle furnace ash is difficult to turn along with the airflow due to large inertia, and the large-particle furnace ash falls into the first ash deposition bin B210 from the upstream cavity of the ash deposition bin A100 after striking the baffle plate 410, so that the large-particle furnace ash is primarily separated. The airflow continues to advance after passing through the upstream chamber of the ash deposition chamber A100, the larger-particle furnace ash is further separated when the airflow passes through the filter screen 420, then the airflow carries the remaining furnace ash with smaller particle size to pass through the filter screen 420 and enter the downstream chamber of the ash deposition chamber A100, and because the flow speed of the airflow in the downstream chamber of the ash deposition chamber A100 is still smaller, part of the furnace ash with smaller particle size falls into the second ash deposition chamber B220 from the downstream chamber of the ash deposition chamber A100, the furnace ash is further separated, and the working load of the dust remover is reduced. The airflow then proceeds back into the flue and eventually enters a dust separator where it is cleaned of emissions.
Specifically, the baffle 410 is disposed in the flue so as to change the direction of the airflow, and the top and two sides thereof may be connected to the inner wall of the flue. The top of the filter screen 420 is connected with the baffle 410, the two sides are connected with the inner wall of the flue, and the aperture of the mesh of the filter screen 420 is determined according to the particle size distribution of the furnace ash. The ash accumulation bin A100, the first ash accumulation bin B210 and the second ash accumulation bin B220 are in a bucket shape with a thick upper part and a thin lower part, so that furnace ash can conveniently fall, and the sectional area of a flow channel is increased due to the arrangement of the ash accumulation bin A100, the first ash accumulation bin B210 and the second ash accumulation bin B220, so that a certain static pressure value is formed in the flow channel, large-particle furnace ash can smoothly fall, and the air flow interference is reduced.
In one embodiment, the baffle 410 may be provided with through holes, and the aperture of the through holes is smaller than the aperture of the meshes of the filter screen 420, so that part of the airflow can pass through the through holes, and the airflow velocity loss is prevented from being too large.
In one embodiment, the top of the baffle 410 and screen 420 are both angled upstream toward the air flow, with an angle of inclination to the vertical in the range of 15-50.
The first bin pump 310 and the second bin pump 320 are used for pneumatically conveying furnace ash in the first ash deposition bin B210 and the second ash deposition bin B220, in a specific embodiment, each of the first bin pump 310 and the second bin pump 320 comprises a bin body 301, a discharge valve 302 arranged at the top of the bin body 301, an exhaust pipe 303 communicated with the upper part of the bin body 301, and fluidizing chambers 304 communicated with the bottom of the bin body 301, each fluidizing chamber 304 is communicated with an air inlet pipe 305 and an ash conveying pipe 306, the air inlet pipe of the first bin pump 310 is communicated with a compressed air storage tank 307, and the ash conveying pipe of the first bin pump 310 is communicated with the air inlet pipe of the second bin pump 320.
The blanking valve 302 is used to control the conduction between the first ash deposition bin B210 and the first bin pump 310, and the conduction between the second ash deposition bin B220 and the second bin pump 320, respectively.
The first bin pump 310 and the second bin pump 320 are connected in series, so that part of valves and pipe fittings are shared, and the cost is reduced. Moreover, the air inlet pipe of the first bin pump 310 is connected with the compressed gas storage tank 307, and the sufficient strength is provided for conveying the furnace dust with large quantity and large particle size in the first ash deposition bin B210, and the furnace dust with small quantity and small particle size in the second ash deposition bin B220, so that the furnace dust in the second ash deposition bin B220 can be taken away by the ash-carrying airflow discharged by the ash conveying pipe of the first bin pump 310, the compressed gas is reasonably utilized, and the gas consumption is reduced.
When more furnace dust in the flue needs to be cleaned, the method is operated according to the following steps:
1. the blanking valve 302 is opened, furnace dust in the first dust deposition bin B210 and the second dust deposition bin B220 respectively falls into bin bodies of a first bin pump 310 and a second bin pump 320, the bin bodies are provided with exhaust pipes 303, gas in the bin bodies 301 can be exhausted while the furnace dust enters, and the blanking valve 302 and the exhaust pipes 303 are closed after the furnace dust falls off or the furnace dust in the bin bodies 301 reaches a set material level;
2. the compressed gas enters the fluidizing chamber of the first bin pump 310 through the gas inlet pipe at a set pressure, and the gas flow exits from the ash conveying pipe along with the furnace ash in the process of passing through the fluidizing chamber; the gas flow carrying the furnace ash is discharged from the ash conveying pipe of the first bin pump 310 and enters the fluidization chamber of the second bin pump 320, and the gas flow further carrying the furnace ash in the bin body of the second bin pump 320 is discharged from the ash conveying pipe of the second bin pump 320; and continuously introducing compressed gas until the furnace ash in the bin body 301 is completely discharged.
In order to avoid excessive loss of the flow rate of the flue gas, in one embodiment, the ash conveying device for the boiler flue provided by the present application further includes an air supply pipeline 500, one end of the air supply pipeline 500 is communicated with the compressed gas storage tank 307, the other end of the air supply pipeline 500 is respectively communicated with the ash conveying pipes of the first bin pump 310 and the second bin pump 320, and the air supply pipeline 500 is provided with a check valve, so that the compressed air flows in a single direction, and the reverse flow of the furnace ash is prevented.
Generally, the compressed gas provided by the gas supply pipeline 500 is injected into the ash conveying pipe 306 through a nozzle to disturb and boost the furnace ash, so that the deposition of the furnace ash is avoided, the flow velocity of the gas flow is ensured, and the pneumatic conveying efficiency is improved.
In one embodiment, the exhaust pipes of the first bin pump 310 and the second bin pump 320 are communicated with the flue, so that the exhausted gas flows back to the flue, and pollution caused by direct discharge is avoided.
In one embodiment, the ash conveying device for the boiler flue further includes an ash storage 600 for storing furnace ash, and the ash conveying pipe of the second bin pump 320 is communicated with the ash storage.
In one embodiment, the air inlet pipe of the first bin pump 310 and the air supply pipe 500 are both provided with pressure regulating valves for regulating the pressure of the compressed air.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
The above-mentioned specific embodiments can not be regarded as the restriction to the protection scope of the present invention, to the technical personnel in this technical field, it is right that any replacement improvement or transformation that the embodiment of the present invention made all fall within the protection scope of the utility model.
The parts of the present invention not described in detail are the known techniques of those skilled in the art.
Claims (9)
1. An ash conveying device for a boiler flue, comprising:
the dust collecting bin A is arranged at the bottom of the flue in a conduction mode, a baffle facing the airflow direction is arranged in the flue above the dust collecting bin A, the dust collecting bin A is divided into two chambers located at the upstream and the downstream of the airflow through a filter screen, and the top of the filter screen is connected with the bottom of the baffle;
the first dust collecting bin B and the second dust collecting bin B are respectively arranged at the bottoms of the two chambers of the dust collecting bin A in a conducting manner;
the first bin pump and the second bin pump are respectively communicated and arranged below the first ash deposition bin B and the second ash deposition bin B and are used for pneumatically conveying furnace ash in the first ash deposition bin B and the second ash deposition bin B.
2. The ash conveying device for the boiler flue according to claim 1, wherein the baffle is provided with through holes, and the aperture of the through holes is smaller than the aperture of the meshes of the filter screen.
3. The ash conveying device for the boiler flue according to claim 1, wherein the shape of the ash storage bin A, the first ash storage bin B and the second ash storage bin B is a bucket shape with a thick upper part and a thin lower part.
4. The ash transport device for a boiler flue of claim 1, wherein the top of the baffle and the screen are both inclined toward the upstream of the gas flow.
5. The ash conveying device for the boiler flue according to claim 1, wherein the first bin pump and the second bin pump respectively comprise a bin body, a discharge valve arranged at the top of the bin body, an exhaust pipe communicated with the upper part of the bin body, and fluidization chambers communicated with the bottom of the bin body, each fluidization chamber is communicated with an air inlet pipe and an ash conveying pipe, the air inlet pipe of the first bin pump is communicated with a compressed gas storage tank, and the ash conveying pipe of the first bin pump is communicated with the air inlet pipe of the second bin pump;
and the blanking valve is respectively used for controlling the conduction of the first dust deposition bin B and the first bin pump and the conduction of the second dust deposition bin B and the second bin pump.
6. The ash conveying device for the boiler flue as claimed in claim 5, further comprising an air supply pipeline, wherein one end of the air supply pipeline is communicated with the compressed gas storage tank, the other end of the air supply pipeline is respectively communicated with the ash conveying pipes of the first bin pump and the second bin pump, and the air supply pipeline is provided with a check valve.
7. The ash conveying device for the boiler flue according to claim 5, wherein the exhaust pipes of the first bin pump and the second bin pump are communicated with the flue.
8. The ash conveying device for the boiler flue according to claim 5, further comprising an ash silo, wherein the ash conveying pipe of the second silo pump is communicated with the ash silo.
9. The ash conveying device for the boiler flue as claimed in claim 6, wherein the air inlet pipe of the first bin pump and the air supply pipeline are provided with pressure regulating valves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021013738.9U CN212408703U (en) | 2020-06-05 | 2020-06-05 | Ash conveying device for boiler flue |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021013738.9U CN212408703U (en) | 2020-06-05 | 2020-06-05 | Ash conveying device for boiler flue |
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| Publication Number | Publication Date |
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| CN212408703U true CN212408703U (en) | 2021-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021013738.9U Active CN212408703U (en) | 2020-06-05 | 2020-06-05 | Ash conveying device for boiler flue |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120740075A (en) * | 2025-08-06 | 2025-10-03 | 望江宁能热电有限公司 | Fly ash conveying system for tail flue of circulating fluidized bed boiler |
-
2020
- 2020-06-05 CN CN202021013738.9U patent/CN212408703U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120740075A (en) * | 2025-08-06 | 2025-10-03 | 望江宁能热电有限公司 | Fly ash conveying system for tail flue of circulating fluidized bed boiler |
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