CN206483342U - The SCR denitration system that a kind of catalyst is in tilted layout - Google Patents
The SCR denitration system that a kind of catalyst is in tilted layout Download PDFInfo
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- CN206483342U CN206483342U CN201720081491.6U CN201720081491U CN206483342U CN 206483342 U CN206483342 U CN 206483342U CN 201720081491 U CN201720081491 U CN 201720081491U CN 206483342 U CN206483342 U CN 206483342U
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- denitration
- flue
- vertical
- gas approach
- catalyst
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Abstract
The utility model discloses the SCR denitration system that a kind of catalyst is in tilted layout, including economizer exit flue, denitration gas approach, the vertical flue of denitration, denitration inclination flue, denitration reaction area and air preheater gas approach；Economizer exit flue is connected with one end of denitration gas approach, the other end of denitration gas approach is connected with the lower end of the vertical flue of denitration, the lower end that the upper end of the vertical flue of denitration tilts flue with denitration is connected, denitration tilts upper end being connected through denitration reaction area and air preheater gas approach of flue, wherein, ammonia-spraying grid is provided with the vertical flue of denitration, denitration, which is tilted, is provided with catalyst layer in flue；The one end being connected on the bottom of denitration gas approach with the vertical flue of denitration is communicated with ash bucket, denitration gas approach provided with the first multistage impingement separators, the problem of system can effectively solve Catalytic Layer dust stratification.
Description
Technical field
The utility model is related to a kind of SCR denitration system, and in particular to the SCR denitration system that a kind of catalyst is in tilted layout
System.
Background technology
NOx gases containing high level in the flue gas of power plant emission, directly discharge will trigger acid rain, photochemical fog
Etc. meteorological disaster, selective catalytic reduction (SCR, Selective Catalytic Reduction) is thermal power plant
In wide variety of flue gas NOx Treatment process.In power plant's SCR denitration system, ammonia is ejected into flue as reducing agent,
Catalyst layer is flowed through after being mixed with flue gas.Under catalyst action, in 300 DEG C~400 DEG C of temperature range, in ammonia and flue gas
NOx, O2 etc. occur following reaction：
4NH3+4NO+O2→4N2+6H2O
NO+NO2+2NH3→2N2+3H2O
Dusty gas NOx is reduced into harmless N2, it is ultimately discharged into air.
In actual power plant's SCR denitration system, catalyst layer is horizontally mounted in the vertical flue of denitration, flue gas and NH3
Mixed gas from top to bottom pass through catalyst layer, occur denitration reaction.Multi-layer catalyst (figure below institute kept flat in vertical flue
Show), as filter screen, the soot particle in ash-laden gas is filtered down, and due to Action of Gravity Field, the cigarette flowed through from top to bottom
Whole soot particles that gas can carry it blow to catalyst layer, and this will undoubtedly aggravate the fouling potential of catalyst layer significantly.Catalyst
Thick dust stratification on layer, can reduce the contact area of denitration reaction, influence the performance of catalyst, reduce the ring of fired power generating unit
Water conservation is put down.In order to clean dust stratification layer, denitrating system will need to arrange more soot blowers, and frequent carry out soot blowing causes system
The cost that comes into operation increase.
Utility model content
The purpose of this utility model is to overcome what the shortcoming of above-mentioned prior art was in tilted layout there is provided a kind of catalyst
SCR denitration system, the problem of system can effectively solve Catalytic Layer dust stratification.
To reach above-mentioned purpose, the SCR denitration system that catalyst described in the utility model is in tilted layout includes economizer
Exhaust pass, denitration gas approach, the vertical flue of denitration, denitration tilt flue, denitration reaction area and air preheater gas approach；
Economizer exit flue is connected with one end of denitration gas approach, and the other end and the denitration of denitration gas approach are erected
The lower end of straight flue is connected, and the upper end of the vertical flue of denitration is connected with the lower end that denitration tilts flue, and denitration tilts flue
Upper end being connected through denitration reaction area and air preheater gas approach, wherein, ammonia-spraying grid is provided with the vertical flue of denitration, is taken off
Nitre, which is tilted, is provided with catalyst layer in flue；
The one end being connected on the bottom of denitration gas approach with the vertical flue of denitration is communicated with ash bucket, denitration gas approach
Inside it is provided with the first multistage impingement separators.
Described first multistage impingement separators are by some horizontal ash resistanting plates.
Provided with the second multistage impingement separators in the vertical flue of denitration.
Second multistage impingement separators are by some vertical ash resistanting plates.
Each horizontal ash resistanting plate is identical with the angle of horizontal direction.
Each vertical ash resistanting plate is identical with the angle of vertical direction.
Catalyst layer tilts the axis perpendicular of flue with denitration.
The utility model has the advantages that：
The SCR denitration system that catalyst described in the utility model is in tilted layout carries a large amount of soot particles in specific works
Flue gas enter from economizer exhaust pass in denitration gas approach, run into after horizontal ash resistanting plate, due to the quality of soot particle and used
Property it is larger, therefore soot particle strike the first multistage impingement separators after can change its direction of motion, it is dropped obliquely, and by
The flue gas stream blow-through that level comes is stored into ash bucket, realizes the purification of flue gas, while catalyst layer is arranged at denitration inclination
In flue, flue gas and remaining soot particle under gravity, there is angle between catalyst layer, so as to effectively reduce remaining ash
Grain hit catalyst layer dynamics so that significantly mitigate catalyst layer enter ash, dust stratification problem, it is ensured that the section of SCR denitration system
Energy Effec-tive Function, simple in construction, easy to operate, practicality is extremely strong.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the schematic diagram of prior art；
Structural representation when Fig. 3 uses for the utility model.
Wherein, 1 be economizer exit flue, 2 be denitration gas approach, 3 be horizontal ash resistanting plate, 4 be ash bucket, 5 be spray ammonia
Grid, 6 be vertical ash resistanting plate, 7 be the vertical flue of denitration, 8 be denitration tilt flue, 9 be catalyst layer, 10 be denitration reaction
Area, 11 are air preheater gas approach.
Embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings：
With reference to Fig. 1, the SCR denitration system that catalyst described in the utility model is in tilted layout includes economizer exit flue
1st, denitration gas approach 2, the vertical flue 7 of denitration, denitration tilt flue 8, denitration reaction area 10 and air preheater gas approach 11；Save
Coal device exhaust pass 1 is connected with one end of denitration gas approach 2, the other end and the vertical flue 7 of denitration of denitration gas approach 2
Lower end be connected, the lower end that the upper end of the vertical flue 7 of denitration tilts flue 8 with denitration is connected, and denitration tilts the upper of flue 8
Being connected through denitration reaction area 10 and air preheater gas approach 11 is held, wherein, provided with ammonia-spraying grid 5 in the vertical flue 7 of denitration,
Denitration, which is tilted, is provided with catalyst layer 9 in flue 8；The one end being connected on the bottom of denitration gas approach 2 with the vertical flue of denitration 7
It is communicated with ash bucket 4, denitration gas approach 2 provided with the first multistage impingement separators.
Described first multistage impingement separators are by some horizontal ash resistanting plates 3, each horizontal ash resistanting plate 3 and the angle of horizontal direction
It is identical.
Provided with the second multistage impingement separators in the vertical flue 7 of denitration；Second multistage impingement separators are by some vertical resistances
Hawk 6；Each vertical ash resistanting plate 6 is identical with the angle of vertical direction.
Catalyst layer 9 tilts the axis perpendicular of flue 8 with denitration.
Specific work process of the present utility model is：
The flue gas for carrying a large amount of soot particles enters in denitration gas approach 2 from economizer exhaust pass 1, runs into horizontal ash resistanting plate
After 3, because the quality and inertia of soot particle are larger, so its direction of motion can be changed after striking horizontal ash resistanting plate 3, make its oblique
Under drop, and stored by the flue gas stream blow-through that level comes into ash bucket 4；Flue gas is not influenceed then by horizontal ash resistanting plate 3, folding
An ash disposal for realizing flue gas is continued up backward.The NH injected from ammonia-spraying grid 53, it is mixed into the flue gas of an ash disposal upwards
Flowing, occurs shock ash disposal with vertical ash resistanting plate 6 when running into vertical ash resistanting plate 6, in addition, the presence of vertical ash resistanting plate 6 makes flue gas
Air-flow formation turbulent flow, increase disturbance promotes NH3With the mixing of flue gas, the generation for being conducive to denitrating flue gas to react.By hitting twice
The flue gas for hitting ash disposal is folded to and enters denitration and tilt in flue 8 again, and enters denitration reaction in the presence of catalyst layer 9
Reacted in area 10, realize the denitration of flue gas, then entered through air preheater gas approach 11 in air preheater.
With reference to Fig. 2, in the horizontally disposed conventional scr denitrating system of catalyst layer 9, because flue is arranged vertically,
Flue gas stream passes through catalyst layer 9 from top to bottom, consistent with the direction of motion of ash particle in gravity direction, therefore gravity will accelerate ash
Particle arrives at catalyst surface, and increases the dynamics that ash particle hits catalyst layer 9, has essentially facilitated entering for catalyst layer 9
Ash and dust stratification.With reference to Fig. 3, the ash particle direction of motion is more than 90 °, the close catalysis of soot particle with gravity direction angle in the utility model
Oxidant layer 9 needs to overcome the effect of gravity, reduces the soot particle for arriving at catalyst layer 9, weakens the dynamics that soot particle hits catalyst layer 9,
So as to significantly mitigate catalyst layer 9 enter ash, dust stratification problem, it is ensured that SCR denitration system efficient energy-saving operation.
Claims (7)
1. the SCR denitration system that a kind of catalyst is in tilted layout, it is characterised in that enter including economizer exit flue (1), denitration
Mouth flue (2), the vertical flue of denitration (7), denitration tilt flue (8), denitration reaction area (10) and air preheater gas approach (11)；
Economizer exit flue (1) is connected with one end of denitration gas approach (2), the other end of denitration gas approach (2) with
The lower end of the vertical flue of denitration (7) is connected, and the upper end of the vertical flue of denitration (7) is connected with the lower end that denitration tilts flue (8)
Logical, denitration tilts upper end being connected through denitration reaction area (10) and air preheater gas approach (11) of flue (8), wherein, it is de-
Ammonia-spraying grid (5) is provided with the vertical flue of nitre (7), denitration, which is tilted, is provided with catalyst layer (9) in flue (8)；
The one end being connected on the bottom of denitration gas approach (2) with the vertical flue of denitration (7) is communicated with ash bucket (4), and denitration enters
Provided with the first multistage impingement separators in mouth flue (2).
2. the SCR denitration system that catalyst according to claim 1 is in tilted layout, it is characterised in that described first is multistage
Impingement separators are by some horizontal ash resistanting plates (3).
3. the SCR denitration system that catalyst according to claim 1 is in tilted layout, it is characterised in that the vertical flue of denitration
(7) provided with the second multistage impingement separators in.
4. the SCR denitration system that catalyst according to claim 3 is in tilted layout, it is characterised in that the second multistage shock
Separator is by some vertical ash resistanting plates (6).
5. the SCR denitration system that catalyst according to claim 1 is in tilted layout, it is characterised in that each horizontal ash resistanting plate
(3) it is identical with the angle of horizontal direction.
6. the SCR denitration system that catalyst according to claim 4 is in tilted layout, it is characterised in that each vertical ash resistanting plate
(6) it is identical with the angle of vertical direction.
7. the SCR denitration system that catalyst according to claim 1 is in tilted layout, it is characterised in that catalyst layer (9) with
Denitration tilts the axis perpendicular of flue (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720081491.6U CN206483342U (en) | 2017-01-22 | 2017-01-22 | The SCR denitration system that a kind of catalyst is in tilted layout |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720081491.6U CN206483342U (en) | 2017-01-22 | 2017-01-22 | The SCR denitration system that a kind of catalyst is in tilted layout |
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| CN206483342U true CN206483342U (en) | 2017-09-12 |
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| CN201720081491.6U Expired - Fee Related CN206483342U (en) | 2017-01-22 | 2017-01-22 | The SCR denitration system that a kind of catalyst is in tilted layout |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108786458A (en) * | 2018-07-10 | 2018-11-13 | 上海电力学院 | A kind of SCR denitration is anti-blocking to put forward effect system |
| CN114797292A (en) * | 2022-05-16 | 2022-07-29 | 大唐环境产业集团股份有限公司 | Large-particle fly ash intercepting device of multilayer corrugated plate type SCR system |
-
2017
- 2017-01-22 CN CN201720081491.6U patent/CN206483342U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108786458A (en) * | 2018-07-10 | 2018-11-13 | 上海电力学院 | A kind of SCR denitration is anti-blocking to put forward effect system |
| CN114797292A (en) * | 2022-05-16 | 2022-07-29 | 大唐环境产业集团股份有限公司 | Large-particle fly ash intercepting device of multilayer corrugated plate type SCR system |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170912 Termination date: 20190122 |