CN208260547U - Power station SCR system ash hopper device based on high centrifugal force flue and brave tooth plate - Google Patents
Power station SCR system ash hopper device based on high centrifugal force flue and brave tooth plate Download PDFInfo
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- CN208260547U CN208260547U CN201820623457.1U CN201820623457U CN208260547U CN 208260547 U CN208260547 U CN 208260547U CN 201820623457 U CN201820623457 U CN 201820623457U CN 208260547 U CN208260547 U CN 208260547U
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Abstract
The utility model discloses a kind of power station SCR system ash hopper device based on high centrifugal force flue and brave tooth plate, the device include: oblique mouth flue, the segmentation arc ash-containing plate below oblique mouth flue, rise oblique angle flue and the oblique mouth flue of connection and the ash bucket for rising oblique angle flue；Deflector, outlet setting flow straightening grid are set inside oblique mouth flue；There is small ash leakage hole on segmentation arc ash-containing plate, there is big ash leakage hole in end；Rising bottom in oblique angle flue has brave tooth plate and leaks grey channel.The utility model has the following beneficial effects: the centrifugal action area being made of oblique mouth flue, segmentation arc ash-containing plate and rising oblique angle flue, more traditional ash bucket greatly improves effective capture area of flying dust and the supplementary set rate to big partial size flying dust, the ash cutting for slowing down catalyst in SCR system extends the service life of catalyst；And after increasing the devices such as deflector, flow straightening grid and brave tooth plate, the utility model meets design requirement together with the pressure drop of SCR reactor assembly.
Description
Technical field
The utility model relates to the collection of station boiler flying dust and capturing technology fields, in particular to one kind based on height
The power station SCR system ash hopper device of centrifugal force flue and brave tooth plate.
Background technique
Nitrogen oxides is to cause one of primary pollution source of atmosphere pollution, wherein nearly 30% derives from coal burning boiler of power station
Discharge.In the existing Flue Gas Denitrification Technologies on Coal-fired Boilers in China, most large-sized station boilers are run using high dirt environment
Selective catalytic reduction (SCR) equipment, chemical reaction therein must just be able to achieve by catalyst.Catalyst is SCR anti-
Most important critical component, reliability and the service life in device is answered to have direct shadow to the reliability service and denitration efficiency of SCR system
It rings, and catalyst is also the highest part of cost in SCR system, accounts for the 30%~50% of system synthesis sheet, therefore catalyst
Production preparation, performance quality and life-span management it is most important to SCR system.
In SCR device actual motion, there are many reasons may result in catalyst activity reduction, the service life is reduced, wherein
Catalyst blockage and abrasion are to influence its mechanical life and active principal element.Excessive wear can make catalyst surface active group
Divide too fast loss, to reduce the service life of active component, and also catalyst can be made thinning, cause catalyst to be broken, damage it
The equipment in downstream.The flue between SCR and economizer is generally fitted with ash bucket system at present, however the flying dust supplementary set of traditional ash bucket is imitated
Effective capture area effect of the rate by ash bucket, it is difficult to it is horizontal to reach higher flying dust abjection.Therefore trip design is efficient on a catalyst
Flying dust supplementary set device it is particularly important.
Utility model content
To solve the above problems, the purpose of this utility model is to provide a kind of based on high centrifugal force flue and brave tooth plate
Power station SCR system ash hopper device, can flying dust more effectively in supplementary set flue gas, avoid damaging upstream device.
The utility model provides a kind of power station SCR system ash hopper device based on high centrifugal force flue and brave tooth plate, should
Device includes: the oblique mouth flue connecting with economizer, the segmentation arc ash-containing plate below oblique mouth flue and SCR reactor
Spray the ash bucket for rising oblique angle flue and the connection oblique mouth flue and the rising oblique angle flue that ammonia flue is connected；Described point
Section arc ash-containing plate upper end is connected with oblique mouth flue, and brave tooth plate is arranged in rising oblique angle flue and leaks grey channel.
It is further improved as the utility model, several deflectors of setting in the oblique mouth flue.
It is further improved as the utility model, the deflector slant setting.
It is further improved as the utility model, several deflectors are straight panel deflector, arc panel deflector
Or semi-arc plate deflector.
It is further improved as the utility model, the quantity of the deflector is 2.
It is further improved as the utility model, flow straightening grid is set at the oblique mouth flue outlet.
It is further improved as the utility model, small ash leakage hole, end setting is set on the segmentation arc ash-containing plate
Big ash leakage hole.
It is further improved as the utility model, the aperture of the big ash leakage hole is 3 times of the small ash leakage hole aperture.
It is further improved as the utility model, the ash bucket and the rising oblique angle flue pass through one section of horizontal wall surface
Connection.
It is further improved as the utility model, the height for leaking grey channel is the 1/4 of the horizontal wall surface length.
The utility model has the following beneficial effects: by below oblique mouth flue, oblique mouth flue segmentation arc ash-containing plate and rising
The first segment in the centrifugal operation area that oblique angle flue is formed, centrifugal operation area passes through the small ash leakage hole and ash-containing plate on arc ash-containing plate
The big ash leakage hole supplementary set flying dust of end, the second segment in centrifugal operation area by rise brave tooth plate on oblique angle flue stop flying dust and by
Grey channel supplementary set flying dust is leaked, effective capture area of flying dust is increased；Deflector is set in oblique angle flue and flow straightening grid is protected
The uniformity into SCR spray ammonia flue gas is demonstrate,proved.
Detailed description of the invention
Fig. 1 is the power station SCR system ash bucket described in the utility model embodiment based on high centrifugal force flue and brave tooth plate
The structural schematic diagram of device；
Fig. 2 is the power station SCR system ash bucket described in the utility model embodiment based on high centrifugal force flue and brave tooth plate
Effective ash disposal area of device；
Fig. 3 is effective ash disposal area of traditional ash bucket；
Fig. 4 is the power station SCR system ash bucket described in the utility model embodiment based on high centrifugal force flue and brave tooth plate
Exemplary diagram when device is specifically used.
In figure,
1, deflector；2 flow straightening grids；3, oblique mouth flue；4, small ash leakage hole；5, it is segmented arc ash-containing plate；6, big ash leakage hole；
7, ash bucket；8, grey channel is leaked；9, brave tooth plate；10, rise oblique angle flue；11, horizontal wall surface；12, ammonia-spraying grid；13, SCR reacts
Device；14, two layers of catalyst.
Specific embodiment
Below by specific embodiment and in conjunction with attached drawing, the utility model is further described in detail.
As shown in Figure 1, a kind of power station SCR based on high centrifugal force flue and brave tooth plate described in the utility model embodiment
System ash hopper device, the device include: oblique mouth flue 3, and entrance is connect with economizer exit；
It is segmented arc ash-containing plate 5, is located at the lower section of oblique mouth flue 3 outlet, and upper end is connected with oblique 3 inner wall of mouth flue；
Ash bucket 7 is located at 5 lower section of segmentation arc ash-containing plate, and one end is connected with described oblique 3 one end of mouth flue；Rise oblique angle cigarette
Road 10, entrance are connected with 7 other end of ash bucket and oblique 3 other end of mouth flue, and outlet is connected with SCR reactor spray ammonia flue；Tiger
Tooth plate 9 is located at and rises in oblique angle flue 10, and leakage ash is formed between 10 inner wall of rising oblique angle flue of brave tooth plate 9 corresponding thereto
Channel 8.Entire flue presentation one arc-shaped, and the flying dust flowed out from economizer is generated a kind of centrifugal movement by the effect of flue.
Further, several deflectors 1 are set in oblique mouth flue 3, the flue gas flowed out from economizer is made to become uniform.
Further, 1 slant setting of deflector, with oblique mouth flue 3 be in similar gradient, guidance air-flow be close to walling of flue and
It is segmented arc ash-containing plate 5 to move, is conducive to flying dust separation.
Select excellent, several deflectors 1 are that straight panel deflector, arc plate deflector or half arc plate deflector, preferably straight panel are led
Flowing plate.
More select it is excellent, the quantity of deflector 1 preferably 2.
Further, flow straightening grid 2 is set in oblique 3 exit of mouth flue, by the traction of flow straightening grid, makes to flow into SCR spray
The air-flow of ammonia flue is more evenly.
Further, it is segmented on arc ash-containing plate 5 and small ash leakage hole 4 is set, the big leakage ash of segmentation 5 end of arc ash-containing plate setting
Hole 6；Since short grained flying dust quality is small, relative velocity is small, and centrifugalization filters short grained flying dust first；Bulky grain
Flying dust quality it is big, relative velocity is larger, has just enter into centrifugation area and is unfavorable for the separation of bulky grain flying dust, removes when entering segmentation arc
Speed is slowed down when hawk end, and centrifugalization is easier to filter the flying dust of bulky grain.
Select excellent, the aperture of big ash leakage hole is 3 times of the small ash leakage hole aperture.
Further, ash bucket 7 is connect with rising oblique angle flue 10 by one section of horizontal wall surface 11, further increases dress
The flying dust set effectively captures area.
Select excellent, the height for leaking grey channel 8 is the 1/4 of 11 length of horizontal wall surface.
Power station SCR system ash hopper device described in the utility model based on high centrifugal force flue and brave tooth plate it is worked
Journey:
The dust concentration of SCR denitration system will generally be controlled in 50g/Nm in power station3It is interior, prevent catalyst abrasion from inactivating.
When unit is run, the flying dust flowed out from economizer flue is influenced by oblique mouth flue 3 and effect of inertia, is close to segmentation arc ash-containing plate
5 movements, and flue gas is drawn by oblique 3 inner deflector 1 of mouth flue and tiltedly mouth flue outlet flow straightening grid 2, uniformly flows to SCR spray ammonia cigarette
Road.Part flying dust is flowed by the big ash leakage hole 6 of small ash leakage hole 4 and segmentation 5 end of arc ash-containing plate between segmentation arc ash-containing plate 5
Enter ash bucket 7, part flying dust flows into flue gas and rises an oblique angle flue 10, centrifugalization and hit the brave tooth risen in oblique angle flue 10
Plate 9, and be collected into ash bucket 7 by the leakage ash channel 8 between brave tooth plate 9 and rising oblique angle flue 10.Since the utility model is
Using the oblique mouth flue 3 being connected with economizer, it is segmented arc ash-containing plate 5 below oblique mouth flue 3 and rises oblique angle flue 10 is formed
The first segment in centrifugal action area, centrifugal action area passes through small ash leakage hole 4, the segmentation arc ash-containing plate 5 between segmentation arc ash-containing plate 5
The 6 supplementary set flying dust of big ash leakage hole of end, the second segment in centrifugal action area pass through brave tooth plate 9 and rise the leakage ash between oblique angle flue 10
8 supplementary set flying dust of channel, more traditional ash bucket greatly improve effective capture area of flying dust, and as shown in Figures 2 and 3, this is practical
Effective ash disposal area of the novel power station SCR system ash hopper device based on high centrifugal force flue and brave tooth plate is significantly greater than tradition ash
Effective ash disposal area of bucket；Ammonia flue is sprayed by arranging that deflector 1 and flow straightening grid 2 ensure that into SCR in oblique mouth flue 3
The uniformity of flue gas.
When specifically used:
Exemplary application Mr. Yu's 660MW coal unit SCR denitration system gas approach, as shown in figure 4,12 be ammonia-spraying grid,
13 be SCR reactor, and 14 be two layers of catalyst.In the base of spray ammonia flue entrance (economizer flue outlet) installation the utility model
In the power station SCR system ash hopper device of high centrifugal force flue and brave tooth plate, including oblique mouth flue 3, the Xie Zui being connected with economizer
3 inner deflector 1 of flue, oblique mouth flue 3 outlet flow straightening grid 2, be segmented arc ash-containing plate 5 below oblique mouth flue 3, segmentation arc removes
The big ash leakage hole 6 of small ash leakage hole 4, segmentation 5 end of arc ash-containing plate between hawk 5 sprays what ammonia flue was connected with SCR reactor
Rise oblique angle flue 10, the brave tooth plate 9 in rising oblique angle flue 10, brave tooth plate 9 and rises the leakage ash channel between oblique angle flue 10
8.Rise oblique angle flue 10 to be connected with one end of ash bucket 7 and oblique mouth flue 3 respectively, rises and used between oblique angle flue 10 and ash bucket 7
One section of horizontal wall surface 11 connects, and rising the grey channel 8 of the leakage between oblique angle flue 10 is highly about the 1/4 of 11 length of horizontal wall surface；Point
The size of the big ash leakage hole 6 of 5 end of section arc ash-containing plate is about 3 times of 4 size of small ash leakage hole being segmented between arc ash-containing plate 5；
Oblique 3 inner deflector 1 of mouth flue is straight panel deflector, and quantity is 2.The flying dust flowed out from economizer flue is by oblique 3 He of mouth flue
Effect of inertia influences, and is close to segmentation arc ash-containing plate 5 and moves, and flue gas is gone out by oblique 3 inner deflector 1 of mouth flue and oblique mouth flue 3
Mouth flow straightening grid 2 is drawn, and uniformly flows to SCR spray ammonia flue.Part flying dust passes through the small ash leakage hole 4 between segmentation arc ash-containing plate 5
And segmentation 5 end of arc ash-containing plate big ash leakage hole 6 flow into ash bucket 7, part flying dust with flue gas flow into rise an oblique angle flue 10, by from
The heart acts on and hits the brave tooth plate 9 risen in oblique angle flue 10, and logical by the leakage ash between brave tooth plate 9 and rising oblique angle flue 10
Road 8 is collected into ash bucket 7.
Due to the utility model use by oblique mouth flue 3, segmentation arc ash-containing plate 5 and rise oblique angle flue 10 formed from
The first segment of heart active region, centrifugal action area passes through the small ash leakage hole 4 and segmentation arc ash-containing plate 5 between segmentation arc ash-containing plate 5
The 6 supplementary set flying dust of big ash leakage hole of end, the second segment in centrifugal action area pass through brave tooth plate 9 and rise the leakage ash between oblique angle flue 10
8 supplementary set flying dust of channel, more traditional ash bucket greatly improve effective capture area of flying dust；And by oblique 3 cloth of mouth flue
It sets deflector 1 and flow straightening grid 2 ensure that the uniformity into SCR spray ammonia flue gas.It can be seen that by Fig. 2 and Fig. 3, this is practical
Novel effective flying dust supplementary set area (S2) is about 1.7 times of the effective supplementary set area (S1) of traditional ash bucket system, is calculated through simulation,
The utility model to 1.3 times that the supplementary set rate of bulky grain flying dust is about traditional ash bucket system, and increase deflector, flow straightening grid,
After the devices such as brave tooth, the utility model is less than 1000Pa together with the pressure drop of SCR reactor assembly, meets design requirement.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (10)
1. a kind of power station SCR system ash hopper device based on high centrifugal force flue and brave tooth plate, which is characterized in that the device packet
It includes:
Oblique mouth flue (3), entrance is connect with economizer exit；
It is segmented arc ash-containing plate (5), is located at the lower section of oblique mouth flue (3) outlet, and upper end and oblique mouth flue (3) inner wall
It is connected；
Ash bucket (7) is located at below the segmentation arc ash-containing plate (5), and one end is connected with described oblique mouth flue (3) one end；
Rise oblique angle flue (10), entrance is connected with the ash bucket (7) other end and oblique mouth flue (3) other end, out
Mouth is connected with SCR reactor spray ammonia flue；
Brave tooth plate (9) is located in the rising oblique angle flue (10), the rising oblique angle cigarette of the tiger tooth plate (9) corresponding thereto
It is formed between road (10) inner wall and leaks grey channel (8).
2. the power station SCR system ash hopper device according to claim 1 based on high centrifugal force flue and brave tooth plate, feature
It is, several deflectors (1) of setting in the oblique mouth flue (3).
3. the power station SCR system ash hopper device according to claim 2 based on high centrifugal force flue and brave tooth plate, feature
It is, several deflector (1) slant settings.
4. the power station SCR system ash hopper device according to claim 2 based on high centrifugal force flue and brave tooth plate, feature
It is, several deflectors (1) are straight panel deflector, arc panel deflector or semi-arc plate deflector.
5. the power station SCR system ash hopper device according to claim 2 based on high centrifugal force flue and brave tooth plate, feature
It is, the quantity of deflector (1) is 2.
6. the power station SCR system ash hopper device according to claim 1 based on high centrifugal force flue and brave tooth plate, feature
It is, oblique mouth flue (3) exit setting flow straightening grid (2).
7. the power station SCR system ash hopper device according to claim 1 based on high centrifugal force flue and brave tooth plate, feature
It is, several small ash leakage holes (4) is set on the segmentation arc ash-containing plate (5)；The setting of the segmentation arc ash-containing plate (5) end
Big ash leakage hole (6).
8. the power station SCR system ash hopper device according to claim 7 based on high centrifugal force flue and brave tooth plate, feature
It is, the aperture of the big ash leakage hole (6) is 3 times of small ash leakage hole (4) aperture.
9. the power station SCR system ash hopper device according to claim 1 based on high centrifugal force flue and brave tooth plate, feature
It is, the ash bucket (7) is connect with the rising oblique angle flue (10) by one section of horizontal wall surface (11).
10. the power station SCR system ash hopper device according to claim 9 based on high centrifugal force flue and brave tooth plate, special
Sign is that the height for leaking grey channel (8) is 1/4 times of the horizontal wall surface (11) length.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820623457.1U CN208260547U (en) | 2018-04-28 | 2018-04-28 | Power station SCR system ash hopper device based on high centrifugal force flue and brave tooth plate |
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| CN201820623457.1U CN208260547U (en) | 2018-04-28 | 2018-04-28 | Power station SCR system ash hopper device based on high centrifugal force flue and brave tooth plate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108339398A (en) * | 2018-04-28 | 2018-07-31 | 大唐环境产业集团股份有限公司 | Power station SCR system ash hopper device based on high centrifugal force flue and brave tooth plate |
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- 2018-04-28 CN CN201820623457.1U patent/CN208260547U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108339398A (en) * | 2018-04-28 | 2018-07-31 | 大唐环境产业集团股份有限公司 | Power station SCR system ash hopper device based on high centrifugal force flue and brave tooth plate |
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