CN210448375U - Dust removal device of coal economizer - Google Patents
Dust removal device of coal economizer Download PDFInfo
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- CN210448375U CN210448375U CN201920708254.7U CN201920708254U CN210448375U CN 210448375 U CN210448375 U CN 210448375U CN 201920708254 U CN201920708254 U CN 201920708254U CN 210448375 U CN210448375 U CN 210448375U
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- dust
- flue
- economizer
- horizontal
- vertical
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- 239000000428 dust Substances 0.000 title claims abstract description 73
- 239000003245 coal Substances 0.000 title claims abstract description 13
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000003546 flue gas Substances 0.000 claims abstract description 32
- 239000000779 smoke Substances 0.000 claims abstract description 7
- 239000012530 fluid Substances 0.000 claims abstract description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 206010022000 influenza Diseases 0.000 claims description 3
- 238000010410 dusting Methods 0.000 claims 1
- 238000000605 extraction Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 9
- 238000004891 communication Methods 0.000 abstract description 2
- 239000002956 ash Substances 0.000 description 30
- 239000010881 fly ash Substances 0.000 description 17
- 239000002245 particle Substances 0.000 description 13
- 239000003054 catalyst Substances 0.000 description 8
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000005484 gravity Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- 241000482268 Zea mays subsp. mays Species 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004062 sedimentation 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 relates to a boiler environment-friendly device field discloses a coal economizer dust collector, and this coal economizer dust collector includes: a vertical flue; a horizontal flue disposed on one side of the vertical flue and in fluid communication with the vertical flue; the dust collecting hopper is arranged below the vertical flue and used for collecting dust in the dust-containing flue gas entering from the upper part of the vertical flue; the guide baffle is arranged at the corner between the vertical flue and the horizontal flue and is used for guiding the dust-containing flue gas before the dust-containing flue gas enters the horizontal flue from the vertical flue; the diversion baffle is a bent plate so that dust in the dust-containing smoke is gathered towards the middle of the dust collecting hopper. The technical scheme provided by the utility model can improve economizer dust collector's dust removal effect.
Description
Technical Field
The utility model relates to a boiler environment-friendly device field specifically relates to a higher economizer dust collector of dust removal efficiency.
Background
Coal is the main fossil energy in China, and the main utilization mode is direct combustion. Nitrogen oxides NO emitted from coal combustionxIs one of the main sources of air pollution. At present, a Selective Catalytic Reduction (SCR) method is generally adopted by a coal-fired power plant to reduce the emission of boiler nitrogen oxides, and the core technology of the method is a catalyst. However, fly ash in boiler flue gas, especially popcorn ash, is hardThe degree is great, and the diameter is more than 6mm, is difficult for being broken into the tiny particle at the flow in-process, can cause serious wear to the catalyst surface and even block up the catalyst passageway when getting into the catalyst passageway, causes the catalyst life to shorten greatly and denitration efficiency reduces scheduling problem, and fine ash also can adhere on the catalyst surface in the flue gas simultaneously, causes the catalyst to poison the scheduling problem. Therefore, the fly ash in the flue gas is removed as much as possible before the flue gas enters the denitration device, so that the service life of the catalyst is greatly prolonged, and the operation stability of the denitration device is improved.
The conventional dust removal ash bucket used at the exit of the coal-fired power station economizer at present deviates greatly from the operation condition due to design, the upper flue gas backflow is small, the fly ash is not favorable for sedimentation due to inertia and the like, meanwhile, the flow field in the ash bucket is complicated and disordered, secondary ash raising is easy to cause, part of collected fly ash cannot be discharged and is carried away by the flue gas again, the pre-removing effect of the ash bucket on the fly ash is greatly reduced, and the danger potential hazards to downstream flue equipment such as an SCR denitration system and an air preheater are increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the above-mentioned problem that prior art exists, provide the better economizer dust collector of dust removal effect altogether.
In order to achieve the above object, the utility model provides a coal economizer dust collector, this coal economizer dust collector includes:
a vertical flue;
a horizontal flue disposed on one side of the vertical flue and in fluid communication with the vertical flue;
the dust collecting hopper is arranged below the vertical flue and used for collecting dust in the dust-containing flue gas entering from the upper part of the vertical flue;
the guide baffle is arranged at the corner between the vertical flue and the horizontal flue and is used for guiding the dust-containing flue gas before the dust-containing flue gas enters the horizontal flue from the vertical flue;
the diversion baffle is a bent plate so that dust in the dust-containing smoke is gathered towards the middle of the dust collecting hopper. Preferably, the diversion baffle is any one of a wave-shaped plate, a ridge-shaped plate, a circular arc-shaped plate or an inverted pyramid-shaped plate.
Preferably, the included angle between the flow guide baffle and the horizontal direction is 0-60 degrees.
Preferably, the corner between the vertical and horizontal flues has a corner tip extending towards the inside of the vertical flue.
Preferably, the cross sections of the vertical flue and the horizontal flue are both rectangular.
Preferably, the horizontal distance between the second side wall where the corner tip is located and the first side wall is 10% -30% of the distance between the first side wall and the second side wall where the corner tip is located.
Preferably, the guide baffle is a steel plate, and the thickness of the steel plate is 6mm-10 mm.
Preferably, the diversion baffle is formed by splicing a plurality of steel plates.
Preferably, a support frame for supporting the diversion baffle is arranged below the diversion baffle.
Preferably, the hopper has two hopper units arranged side by side.
The utility model provides a technical scheme has following beneficial effect:
the dust removal device of the coal economizer comprises a vertical flue, a horizontal flue, an ash collecting hopper and a flow guide baffle plate, wherein dust-containing flue gas enters from the upper part of the vertical flue and deflects towards the middle of the vertical flue when passing through the flow guide baffle plate, and fly ash in the flue gas is separated from the flue gas and falls into the ash collecting hopper due to the influence of inertia and initial kinetic energy when flowing through the upper part of the ash collecting hopper; the guide plate is arranged into a bent plate, so that the flow field distribution of the flue gas can be optimized, a flow field with relatively low flow velocity is organized above the ash collecting hopper, and the initial kinetic energy direction of the fly ash particles in the flue gas is consistent with the gravity direction, so that the fly ash particles in the flue gas can be gathered towards the middle of the ash collecting hopper as far as possible under the action of gravity and inertia force and are separated and collected by the ash collecting hopper as much as possible, and compared with a flat plate, the guide plate has higher collection rate of the fly ash particles in the flue gas and better dust removal effect;
in addition, the resistance caused by the bent plate type guide plate is smaller than that of the guide plate with a flat plate structure, so that the eddy generated when the smoke turns from the vertical flue to the horizontal flue is effectively slowed down, the pressure loss caused by the eddy is small, the power consumption of the fan is not increased much, and the energy is saved.
Drawings
FIG. 1 is a front view of a dust removing device of an economizer provided in an embodiment of the present invention;
FIG. 2 is a top view of an economizer dust collector provided in an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of an economizer dust removing device without a diversion baffle provided in an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of an economizer dust collector with an inverted pyramid-shaped deflector according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of an economizer dust removing device with a ridge-shaped deflector according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of an economizer dust collector with a wave-shaped flow guide baffle according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an economizer dust collector applied to an SCR system according to an embodiment of the present invention.
Description of the reference numerals
1-vertical flue 2-second side wall
3-diversion baffle 4-ash collecting bucket
5-horizontal flue 6-front side plate
7-rear side panel 8-first side wall
Detailed Description
In the embodiments of the present invention, the use of directional terms such as "upper, lower, left, and right" generally means upper, lower, left, and right with reference to the accompanying drawings, unless otherwise specified. "inner and outer" refer to the inner and outer relative to the contour of the component itself.
Referring to fig. 1 to 7, an embodiment of the present invention provides a dust removing device for an economizer, which includes a vertical flue 1, a horizontal flue 5, an ash collecting hopper 4 and a flow guiding baffle 3;
the horizontal flue 5 is arranged on one side of the vertical flue 1 and is communicated with the vertical flue 1; the ash collecting hopper 4 is arranged below the vertical flue 1 and is coaxial with the vertical flue 1, the opening at the upper part of the ash collecting hopper is larger than the opening at the lower part of the ash collecting hopper, and the opening at the upper part of the ash collecting hopper is communicated with the vertical flue 1; the diversion baffle 3 is arranged at the corner between the vertical flue 1 and the horizontal flue 5, and the diversion baffle 3 is a bent plate, so that the effect of gathering dust in the dust-containing flue gas to the middle of the dust collecting hopper 4 is achieved.
The cross sections of the horizontal flue 5 and the vertical flue 1 can be square, the ash collecting hopper 4 is in a quadrangular pyramid shape, the upper side plate of the horizontal flue 5 is connected with the right side plate of the vertical flue 1 and is perpendicular to the right side plate, the lower side plate is connected with one side plate of the ash collecting hopper 4, and the front side plate 6 and the rear side plate 7 are correspondingly connected with the front side plate 6 and the rear side plate 7 of the vertical flue 1 respectively and are located on the same plane.
As shown in fig. 7, the economizer outlet flue communicates with the downstream flue through the economizer dust removing device, and the direction of the arrow in fig. 1 and 7 is the flow direction of the flue gas. The dust-containing flue gas discharged from the outlet of the coal economizer enters from the upper part of the vertical flue 1, deflects towards the middle of the vertical flue 1 when passing through the flow guide baffle 3, and the fly ash in the flue gas is separated from the flue gas and falls into the ash hopper due to the influence of inertia and initial kinetic energy when passing through the upper part of the ash collecting hopper 4; the guide plate is arranged into a bent plate, so that the flow field distribution of the flue gas can be optimized, a flow field with relatively low flow velocity is organized above the ash collecting hopper 4, and the initial kinetic energy direction of the fly ash particles in the flue gas is consistent with the gravity direction, so that the fly ash particles in the flue gas can be gathered towards the middle of the ash collecting hopper 4 as far as possible under the action of gravity and inertia force and are separated and collected by the ash collecting hopper 4 as much as possible, and compared with a flat plate, the guide plate has higher collection rate of the fly ash particles in the flue gas and better dust removal effect;
in addition, the resistance caused by the bent plate type guide plate is smaller than that of the guide plate with a flat plate structure, so that the eddy generated when the smoke turns from the vertical flue 1 to the horizontal flue 5 is effectively slowed down, the pressure loss caused by the eddy is small, the power consumption of the fan is not increased much, and the energy is saved.
The concrete structure of the deflector 3 may be various, such as an inverted pyramid-shaped plate as shown in fig. 4, a ridge-shaped plate as shown in fig. 5, a wave-shaped plate as shown in fig. 6, or a circular arc-shaped plate (not shown). The diversion baffle 3 has various structures and wide application range, and can be selected according to actual conditions when the tail flue is reformed.
A set of diversion baffle 3 such as an inverted pyramid-shaped plate is correspondingly arranged on a dust removing device of the coal economizer, so that the effect of gathering the fly ash particles flowing through the inverted pyramid-shaped diversion baffle 3 can be achieved, and the fly ash particles can more easily enter the ash collecting hopper 4 to be collected.
The guide baffle 3 may be, for example, a hot-pressed steel plate, the thickness of which may be generally selected from 6mm to 10mm, and has certain wear resistance, which is helpful to improve the service life of the guide baffle 3 while maintaining the performance of the guide baffle 3, and the guide baffle 3 may be a whole plate, or may be formed by splicing a plurality of plates, such as hot-pressed steel plates.
The lower part of the diversion baffle plate is provided with a support frame such as a triangular support, the triangular support is welded with the inner surface of the upper side plate of the horizontal flue 5, or a cross beam is built between the front side plate 6 and the rear side plate 7 of the horizontal flue 5 below the diversion baffle plate 3, the diversion baffle plate 3 is supported by the cross beam, and the diversion baffle plate 3 is ensured to have certain strength and firmness.
As shown in fig. 1-2, in a preferred embodiment, the corner between the vertical flue 1 and the horizontal flue 5 has a corner tip extending towards the inside of the vertical flue 1, and the deflector 3 is connected to the corner tip and extends towards a first side wall 8 of the vertical flue 1 opposite to the corner tip. On one hand, the corner tip has a certain flow guide effect on smoke and dust smoke, and on the other hand, the flow guide baffle 3 can be conveniently installed and the position angle can be conveniently determined.
The included angle between the diversion baffle 3 and the horizontal direction and the length of the diversion baffle 3 have important influence on the dust removal efficiency of the dust removal device of the coal economizer. Preferably, the angle between the baffle 3 and the horizontal direction may be, for example, 0 ° to 60 °, and the horizontal distance that the baffle 3 extends is 10% to 30% of the horizontal distance between the second sidewall 2 where the corner tip is located and the first sidewall 8. The second side wall 2 is an inner wall of a right side plate of the vertical flue 1 in fig. 1, and the first side wall 8 is an inner wall of a left side plate of the vertical flue 1 in fig. 1.
Have above-mentioned angle and length through setting up water conservancy diversion baffle 3, can improve economizer dust collector's dust removal effect, more specific length and the angle of setting up can be adjusted according to actual demand.
Referring to fig. 3-6, the dust hopper 4 is used for collecting fly ash particles in the dust-containing flue gas, and in order to improve the collecting capability of the dust hopper 4 for fly ash particles, in the preferred embodiment of the present invention, the dust hopper 4 has two hopper units arranged side by side. Compared with the arrangement of one large ash collecting hopper 4, the arrangement mode of the ash collecting hopper 4 can effectively improve the particle collecting capacity of the ash collecting hopper 4, can reduce the system pressure of the outlet section of the economizer, and is beneficial to improving the stability of the particle collecting capacity of the ash collecting hopper 4 under the working condition of variable wind speed.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited thereto. The technical scheme of the utility model in the technical conception scope, can be right carry out multiple simple variant. Including each of the specific features, are combined in any suitable manner. In order to avoid unnecessary repetition, the present invention does not separately describe various possible combinations. These simple variations and combinations should also be considered as disclosed in the present invention, all falling within the scope of protection of the present invention.
Claims (10)
1. An economizer dust removal device, characterized in that, this economizer dust removal device includes:
a vertical flue (1);
the horizontal flue (5), the horizontal flue (5) is arranged on one side of the vertical flue (1) and is communicated with the fluid of the vertical flue (1);
the dust collecting hopper (4) is arranged below the vertical flue (1) and is used for collecting dust in the dust-containing flue gas entering from the upper part of the vertical flue (1);
the flow guide baffle (3) is arranged at the corner between the vertical flue (1) and the horizontal flue (5), and is used for guiding the dust-containing flue gas before the dust-containing flue gas enters the horizontal flue (5) from the vertical flue (1);
the diversion baffle (3) is a bent plate so that dust in the dust-containing smoke is gathered towards the middle of the dust collecting hopper (4).
2. The economizer dust collector of claim 1, wherein the deflector (3) is any one of a wave-shaped plate, a ridge-shaped plate, a circular arc-shaped plate or an inverted pyramid-shaped plate.
3. The dust removing device of the coal economizer as claimed in claim 1, wherein the angle between the flow guide baffle (3) and the horizontal direction is 0-60 °.
4. The economizer dusting device according to claim 1, characterized in that the corner between the vertical flue (1) and the horizontal flue (5) has a corner tip extending towards the inside of the vertical flue (1), the deflector baffle (3) being connected to the corner tip and extending towards a first side wall (8) of the vertical flue (1) opposite to the corner tip.
5. The economizer dedusting apparatus according to claim 4, characterized in that the vertical flues (1) and the horizontal flues (5) are both rectangular in cross section.
6. The economizer dust extraction device according to claim 5, characterized in that the deflector (3) extends from the corner tip towards the first side wall (8) for a horizontal distance which is 10-30% of the horizontal spacing between the second side wall (2) and the first side wall (8) where the corner tip is located.
7. The economizer dust collector of claim 1, wherein the deflector (3) is a steel plate having a thickness of 6mm to 10 mm.
8. The economizer dust collector of claim 7, wherein the deflector (3) is made by splicing a plurality of steel plates.
9. The economizer dust collector of claim 1, wherein a support frame for supporting the deflector (3) is arranged below the deflector (3).
10. The economizer dust removal device according to claim 1, characterized in that the hopper (4) has two hopper units arranged side by side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920708254.7U CN210448375U (en) | 2019-05-16 | 2019-05-16 | Dust removal device of coal economizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920708254.7U CN210448375U (en) | 2019-05-16 | 2019-05-16 | Dust removal device of coal economizer |
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| Publication Number | Publication Date |
|---|---|
| CN210448375U true CN210448375U (en) | 2020-05-05 |
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| CN201920708254.7U Active CN210448375U (en) | 2019-05-16 | 2019-05-16 | Dust removal device of coal economizer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112178629A (en) * | 2020-10-30 | 2021-01-05 | 北京热华能源科技有限公司 | Tail shaft flue separation device and multi-process circulating fluidized bed |
-
2019
- 2019-05-16 CN CN201920708254.7U patent/CN210448375U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112178629A (en) * | 2020-10-30 | 2021-01-05 | 北京热华能源科技有限公司 | Tail shaft flue separation device and multi-process circulating fluidized bed |
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