CN206543470U - A kind of grey blocking apparatus of efficient low-resistance twin-stage SCR denitration bulky grain - Google Patents
A kind of grey blocking apparatus of efficient low-resistance twin-stage SCR denitration bulky grain Download PDFInfo
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- CN206543470U CN206543470U CN201720062669.2U CN201720062669U CN206543470U CN 206543470 U CN206543470 U CN 206543470U CN 201720062669 U CN201720062669 U CN 201720062669U CN 206543470 U CN206543470 U CN 206543470U
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Abstract
The utility model discloses a kind of grey blocking apparatus of efficient low-resistance twin-stage SCR denitration bulky grain, including：First order Lan Hui mechanisms and second level Lan Hui mechanisms, wherein the first order Lan Hui mechanisms are arranged at economizer exit, including the dark-grey bucket of the first deflector, economizer, ash bucket outlet is short blocks grey net；It blocks grey mechanism connection by a horizontal flue and the second level；The second level Lan Hui mechanisms are arranged at vertical flue entrance, and it includes wall and the second deflector after denitration ash bucket, gas solid separation, wherein the denitration ash bucket is arranged on below the vertical flue, second deflector is arranged in the vertical flue entrance；After the gas solid separation wall be arranged on after vertical flue wall just to horizontal flue at.The utility model is collected in the efficient interception that bulky grain ash is not substantially realized on the premise of increase flue resistance, so as to effectively prevent the problem of catalyst layer Severe blockage caused by the grey blocking catalyst duct of bulky grain.
Description
Technical field
The utility model is related to technical field of atmospheric pollution control, particularly relates to a kind of efficient low-resistance twin-stage SCR and takes off
Nitre bulky grain ash blocking apparatus.
Background technology
SCR：Selective Catalytic Reduction, abbreviation SCR.SCR denitration technology refers to 280~420
In the range of DEG C, reducing agent (such as NH3, urea and ammoniacal liquor) under catalyst action, " selective " it is anti-with NOx in flue gas
Should, generate free of contamination N2 and H2O NOx abatement technology.
In the prior art in order to meet increasingly strict NOx emission standard, coal-burning power plant is generally mounted with high-temperature high dust formula
SCR equipment for denitrifying flue gas, SCR reactors are arranged in economizer, and (economizer, which is mounted to boiler back end ductwork bottom, to be used to reclaim
A kind of device of waste heat, the heating surface for saturation water boiler feedwater being heated under drum pressure, because it absorbs low-temperature flue gas
Heat, reduce the exhaust gas temperature of flue gas, save the energy, improve efficiency, so referred to as economizer) and air preheat
Between device.Investigation finds that catalyst layer there occurs that serious flying dust is blocked during part SCR equipment for denitrifying flue gas puts into operation, and block
Area is even up to more than 30%.Denitrification apparatus performance is not only greatly lowered in this, also improves unplugged region catalyst pores
Interior velocity of flue gas, deteriorated catalyst erosive wear.The root for causing catalyst seriously to block up ash is clinker bulky grain or accumulation
Flying dust caves in blocking catalyst duct, and the accumulation of blocking region flying dust, which gradually increases, becomes big.Therefore, in order to mitigate catalyst layer fly
Ash is blocked, need to also be in economizer exit to the flue between SCR reactors in addition to installing soot blower in SCR reactors
Arrangement blocks apparatus for ash, reduces the flying dust quantity for entering SCR reactors, particularly bulky grain ash.
Coal-burning power plant's SCR denitration device generally only sets ash bucket collection to fly in economizer exit and/or vertical flue entrance
Ash.Although conventional ash bucket can also intercept bulky grain ash, intercepting efficiency needs further improve.Specially grind both at home and abroad at present
The grey Interception Technology of the SCR equipment for denitrifying flue gas bulky grain of hair mainly includes three types：Baffle plate blocks grey method, screen cloth or porous plate and blocked
Grey method, unhurried current flue sedimentation.Wherein, baffle plate method makes flying dust by blocking grey baffle plate with outlet setting above economizer hopper
Change the direction of motion after collision overhead gage and fall into ash bucket, and stop that flying dust is escaped from from economizer hopper by outlet damper, from
And realize the interception of bulky grain ash and collect.It is in horizontal flue entrance or the installation of vertical flue entrance that screen cloth or porous plate, which block grey method,
The metallic sieve or porous plate in a certain angle with flue cross section, is collected by filtration the fly ash granule bigger than mesh, or pass through collision
Bulky grain ash is collected in sedimentation.Metallic sieve and porous plate are generally covered with whole flue cross section.The flue method that flows slowly is by reducing cigarette
Gas velocity makes flying dust be deposited under gravity in the denitration ash bucket of vertical flue entrance.
Baffle plate, which blocks the usual stream field of grey method, considerable influence, and flow field uniformity is often resulted in significantly pursuing when height blocks grey rate
Degree declines, the problem of flow resistance significantly rises.Screen cloth and porous plate can intercept in theory it is all than mesh size greatly fly
Ash particle, blocks grey rate and SR and is inversely proportional with mesh size.Because metallic sieve and porous plate are generally covered with whole flue
Section, thus this technology exist the big resistance of mesh size it is relatively low to block grey effect poor, and reduce and occur resistance after mesh size
Excessive the problem of.In addition, also there is the problem of easily galling in metallic sieve.Limited by site space, the unhurried current of vertical flue entrance
The size of flue can not be too big, it is difficult to the effect of flying dust deceleration sedimentation is realized in short distance.
Therefore, utility model people of the present utility model needs a kind of new technology of design badly to improve its problem.
Utility model content
The utility model aims to provide a kind of grey blocking apparatus of efficient low-resistance twin-stage SCR denitration bulky grain, and it can be not
The efficient interception that bulky grain ash is substantially realized on the premise of increase flue resistance is collected, so as to effectively prevent because of bulky grain ash
The problem of catalyst layer Severe blockage that blocking catalyst duct is caused.
In order to solve the above technical problems, the technical solution of the utility model is：
A kind of grey blocking apparatus of efficient low-resistance twin-stage SCR denitration bulky grain, including：First order Lan Hui mechanisms and the second level are blocked
Grey mechanism, wherein the first order Lan Hui mechanisms are arranged at economizer exit, including the dark-grey bucket of the first deflector, economizer,
Ash bucket outlet is short to block grey net；It blocks grey mechanism connection by a horizontal flue and the second level；The second level Lan Hui mechanisms
It is arranged at vertical flue entrance, it includes wall and the second deflector after denitration ash bucket, gas solid separation, wherein the denitration ash bucket
It is arranged on below the vertical flue, second deflector is arranged in the vertical flue entrance；After the gas solid separation
Wall be arranged on after vertical flue wall just to horizontal flue at.
Preferably, the first order Lan Hui mechanisms include the dark-grey bucket of the first deflector, economizer, ash bucket outlet is short blocks ash
Net；Wherein described first deflector is arranged at economizer exit and is inclined relative to horizontal setting, and the economizer is dark-grey
Bucket is arranged on below first deflector and is fixedly connected with the horizontal flue；Ash bucket outlet is short to block grey net and is arranged on
The horizontal flue enters at the dark-grey bucket of the intraoral close economizer, and is inclined relative to horizontal setting.
Preferably, wall is wall after wall after fold-line-shaped gas solid separation or arc line shaped gas solid separation after the gas solid separation.
Preferably, ash bucket outlet is short blocks grey net and blocks grey net for porous plate.
Preferably, first deflector is slide plate.
Preferably, the bucket depth of the dark-grey bucket of the economizer is more than the bucket depth of the denitration ash bucket.
Preferably, the rear wall of the dark-grey bucket of the economizer and the angle of the horizontal flue are between 80-90 degree angle.
Preferably, the short angle for blocking grey net and the horizontal flue in ash bucket outlet is 60 degree of angles.
Preferably, the short length for blocking ash net in ash bucket outlet for the horizontal flue height 1 to two/8ths/
One.
Preferably, the ash bucket outlet is short blocks a quarter that the grey length netted is the horizontal flue height.
Using above-mentioned technical proposal, the utility model at least includes following beneficial effect：
The grey blocking apparatus of efficient low-resistance twin-stage SCR denitration bulky grain described in the utility model, is not substantially increasing flue
The efficient interception that bulky grain ash is realized on the premise of resistance is collected, so as to effectively prevent because of the grey blocking catalyst hole of bulky grain
The problem of catalyst layer Severe blockage that road is caused.
Brief description of the drawings
Fig. 1 is the structural representation of the grey blocking apparatus of efficient low-resistance twin-stage SCR denitration bulky grain described in the utility model；
Fig. 2 is the structural representation of the first deflector described in the utility model；
Fig. 3 is that ash bucket described in the utility model exports the short structural representation for blocking ash net；
Fig. 4 is the top view of the dark-grey bucket of economizer described in the utility model.
Wherein：1st, grey net 5, water short are blocked in the dark-grey bucket 4 of economizer exit 2, the first deflector 3, economizer, ash bucket outlet
Wall 8, the second deflector 9, vertical flue after flat flue 6, denitration ash bucket 7, gas solid separation.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belongs to the scope of the utility model protection.
As shown in Figures 1 to 4, intercepted to meet a kind of efficient low-resistance twin-stage SCR denitration bulky grain ash of the present utility model
Device, including：First order Lan Hui mechanisms and second level Lan Hui mechanisms, wherein the first order Lan Hui mechanisms are arranged on economizer and gone out
At mouth 1, it blocks grey mechanism connection by a horizontal flue 5 with the second level；The second level Lan Hui mechanisms are arranged on vertically
The porch of flue 9, it includes the deflector 8 of wall 7 and second after denitration ash bucket 6, gas solid separation, wherein the denitration ash bucket 6 is set
Below the vertical flue 9, second deflector 8 be arranged on the vertical flue 9 enter it is intraoral；After the gas solid separation
Wall 7 be arranged on after vertical flue 9 wall just to horizontal flue 5 at.
Preferably, the first order Lan Hui mechanisms include the dark-grey bucket 3 of the first deflector 2, economizer, ash bucket outlet is short blocks ash
Net 4；Wherein described first deflector 2 is arranged at economizer exit 1 and is inclined relative to horizontal setting, and the economizer is deep
Ash bucket 3 is arranged on the lower section of the first deflector 2 and is fixedly connected with the horizontal flue 5；The ash bucket outlet is short to block grey net 4
It is arranged on the horizontal flue 5 to enter at the intraoral dark-grey bucket 3 of the close economizer, and is inclined relative to horizontal setting.
Preferably, wall 7 is wall 7 after wall 7 after fold-line-shaped gas solid separation or arc line shaped gas solid separation after the gas solid separation.
Preferably, ash bucket outlet is short blocks grey net 4 and blocks grey net for porous plate.
Preferably, first deflector 2 is slide plate.
Preferably, the bucket depth of the dark-grey bucket 3 of the economizer is more than the bucket depth of the denitration ash bucket 6.
Preferably, the dark-grey bucket 3 of the economizer is inverted trapezoidal.
Preferably, the rear wall of the dark-grey bucket 3 of the economizer and the angle of the horizontal flue 5 are between 80-90 degree angle.
Preferably, the short angle for blocking grey net 4 and the horizontal flue 5 in ash bucket outlet is 60 degree of angles.
Preferably, the short length for blocking grey net 4 in ash bucket outlet is 1 to two/8ths points of the height of horizontal flue 5
One of.
Preferably, the ash bucket exports a quarter that the short length for blocking grey net 4 is the height of horizontal flue 5.
The operation principle of the present embodiment is：First order Lan Hui mechanisms are by most of bulky grain by the first deflector 2
Ash introduces the dark-grey bucket 3 of economizer, and reduces bulky grain ash from ash using nearly vertical economizer 3 Hou Qiang of dark-grey bucket and big depth ash bucket
The amount of escaping from bucket.In addition, the porous plate for setting the length about height of horizontal flue 5 1/4 in economizer exit 1 blocks grey net, with big
About 60 degree of angle is arranged on the entrance of horizontal flue 5 to not fallen into the small density bulky grain ash of the dark-grey bucket 3 of economizer and from province
The bulky grain ash that coal device ash bucket is escaped from carries out interception collection.Second level Lan Hui mechanisms are will by wall 7 after broken line type gas solid separation
Be usually located at 5 times half storeys of horizontal flue bulky grain ash collision deceleration spring back into denitration ash bucket 6, while by flue gas water conservancy diversion to erect
Straight flue 9, passes through vertical flue 9 to SCR reactors.
The utility model proposes the grey Interception Technology of efficient low-resistance SCR denitration device bulky grain in two-stage block gray technology and be
Separate, i.e., user individually can block grey machine according to site space condition limit value using first order Lan Hui mechanisms or the second level
Structure, also can substantially increase the practicality of institute's research and development technology and device at the scene using two-stage combination Lan Hui mechanisms.
In order to verify the effect of technical solutions of the utility model, using physical model test method is to its resistance and blocks grey effect
Fruit is measured, as a result as shown in table 1 below.As can be seen from the table, the utility model proposes the grey Interception Technology of bulky grain
Substantially do not increase flue resistance, or even flue resistance can be reduced by improving flow field.When only with first order Lan Hui mechanisms, escape
The flying dust escaped to SCR reactors can reduce 88.5%, be reduced to 0.71%.During only with second level Lan Hui mechanisms, escape extremely
The flying dust of SCR reactors can reduce 42.4%, be reduced to 3.57%.
The bulky grain of table 1 ash Interception Technology physical experiments result
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or new using this practicality
Type.A variety of modifications to these embodiments will be apparent for those skilled in the art, determine herein
The General Principle of justice can in other embodiments be realized in the case where not departing from spirit or scope of the present utility model.Cause
This, the utility model is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The most wide scope consistent with features of novelty.
Claims (10)
1. a kind of grey blocking apparatus of efficient low-resistance twin-stage SCR denitration bulky grain, it is characterised in that including：First order Lan Hui mechanisms
With second level Lan Hui mechanisms, wherein the first order Lan Hui mechanisms are arranged at economizer exit, its by a horizontal flue with
Block grey mechanism connection in the second level；The second level Lan Hui mechanisms are arranged at vertical flue entrance, it include denitration ash bucket,
Wall and the second deflector after gas solid separation, wherein the denitration ash bucket is arranged on below the vertical flue, second water conservancy diversion
Plate is arranged in the vertical flue entrance；After the gas solid separation wall be arranged on after vertical flue wall just to horizontal flue at.
2. the grey blocking apparatus of efficient low-resistance twin-stage SCR denitration bulky grain as claimed in claim 1, it is characterised in that：Described
One-level Lan Hui mechanisms include the dark-grey bucket of the first deflector, economizer, ash bucket outlet is short blocks grey net；Wherein described first deflector is set
Put at economizer exit and be inclined relative to horizontal setting, the dark-grey bucket of economizer is arranged under first deflector
Horizontal flue is fixedly connected described in Fang Bingyu；Ash bucket outlet is short block grey net be arranged on the horizontal flue enter it is intraoral close to institute
State at the dark-grey bucket of economizer, and be inclined relative to horizontal setting.
3. the grey blocking apparatus of efficient low-resistance twin-stage SCR denitration bulky grain as claimed in claim 2, it is characterised in that：The gas
Gu wall is wall after wall after fold-line-shaped gas solid separation or arc line shaped gas solid separation after separation.
4. the grey blocking apparatus of efficient low-resistance twin-stage SCR denitration bulky grain as claimed in claim 2 or claim 3, it is characterised in that：It is described
Ash bucket outlet is short to block grey net and blocks grey net for porous plate.
5. the grey blocking apparatus of efficient low-resistance twin-stage SCR denitration bulky grain as claimed in claim 2, it is characterised in that：Described
One deflector is slide plate.
6. the grey blocking apparatus of efficient low-resistance twin-stage SCR denitration bulky grain as described in claim 2-, it is characterised in that：The province
The bucket depth of the dark-grey bucket of coal device is more than the bucket depth of the denitration ash bucket.
7. the grey blocking apparatus of efficient low-resistance twin-stage SCR denitration bulky grain as claimed in claim 2, it is characterised in that：The province
The rear wall of the dark-grey bucket of coal device and the angle of the horizontal flue are between 80-90 degree angle.
8. the grey blocking apparatus of efficient low-resistance twin-stage SCR denitration bulky grain as claimed in claim 2, it is characterised in that：The ash
The short angle for blocking grey net and the horizontal flue in bucket outlet is 60 degree of angles.
9. the grey blocking apparatus of efficient low-resistance twin-stage SCR denitration bulky grain as claimed in claim 2, it is characterised in that：The ash
The short length for blocking ash net in bucket outlet is 1st/1 to two/8ths of the horizontal flue height.
10. the grey blocking apparatus of efficient low-resistance twin-stage SCR denitration bulky grain as claimed in claim 2, it is characterised in that：The ash
Bucket outlet is short to block a quarter that the grey length netted is the horizontal flue height.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720062669.2U CN206543470U (en) | 2017-01-19 | 2017-01-19 | A kind of grey blocking apparatus of efficient low-resistance twin-stage SCR denitration bulky grain |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720062669.2U CN206543470U (en) | 2017-01-19 | 2017-01-19 | A kind of grey blocking apparatus of efficient low-resistance twin-stage SCR denitration bulky grain |
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| CN206543470U true CN206543470U (en) | 2017-10-10 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106731250A (en) * | 2017-01-19 | 2017-05-31 | 苏州西热节能环保技术有限公司 | A kind of efficient low-resistance twin-stage SCR denitration bulky grain ash blocking apparatus |
| CN112569774A (en) * | 2020-12-25 | 2021-03-30 | 郑州市天之蓝环保科技有限公司 | Dust-containing flue gas conveying reversing pipeline and dry desulfurization system |
-
2017
- 2017-01-19 CN CN201720062669.2U patent/CN206543470U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106731250A (en) * | 2017-01-19 | 2017-05-31 | 苏州西热节能环保技术有限公司 | A kind of efficient low-resistance twin-stage SCR denitration bulky grain ash blocking apparatus |
| CN112569774A (en) * | 2020-12-25 | 2021-03-30 | 郑州市天之蓝环保科技有限公司 | Dust-containing flue gas conveying reversing pipeline and dry desulfurization system |
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