CN209302540U - A kind of SCR flue gas denitrification system - Google Patents
A kind of SCR flue gas denitrification system Download PDFInfo
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- CN209302540U CN209302540U CN201821785662.4U CN201821785662U CN209302540U CN 209302540 U CN209302540 U CN 209302540U CN 201821785662 U CN201821785662 U CN 201821785662U CN 209302540 U CN209302540 U CN 209302540U
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- flue gas
- gas denitrification
- denitrification system
- scr flue
- primary air
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Abstract
SCR flue gas denitrification system in the application is newly established and exports the pipeline that access dilution air exports from primary air fan all the way, and and connecting on the pipeline the first non-return valve and the first regulating valve.Load and the primary air fan wind pressure random groups load variations of SCR flue gas denitrification system and the variation that is positively correlated, primary air fan unit are arranged in parallel with dilution air unit, can adapt to system different load state, while energy saving.
Description
Technical field
The utility model relates to thermal power plant SCR technology fields, specifically, are related to a kind of SCR flue gas denitrification system.
Background technique
The effect of dilution air is to blast large quantity of air ammonia is diluted to after certain proportion through spraying by ammonia-air mixer
Enter pipe reactor, prevents ammonia from mixing with air and reach explosion ratio, to avoid danger.Thermal power plant SCR (choosing
Selecting property catalytic reduction reaction) dilution air unit is connect with ammonia-air mixer in area.Since dilution air unit uses always
Constant wind quantity operation, when system is under low load condition, ammonia spraying amount is low, and it is relatively bigger than normal to dilute air quantity, dilution air unit
Efficiency is relatively low, and total energy consumption is higher；When system is under higher load condition, ammonia spraying amount is high, and it is relatively small to dilute air quantity, needs more
The operation of dilution air unit, total energy consumption are equally higher.
Therefore, how a kind of SCR flue gas denitrification system is provided, can adapt to system different load state, while saving energy
Consumption, is a technical problem that technical personnel in the field need to solve at present.
Utility model content
In view of this, the present invention provides a kind of SCR flue gas denitrification systems, can adapt to system different load shape
State, while energy saving.
To achieve the above object, the utility model provides the following technical solutions:
A kind of SCR flue gas denitrification system, including dilution air unit and ammonia/air mixer, which is characterized in that further include
The primary air fan unit being arranged in parallel with the dilution air unit, the primary air fan unit with the dilution air unit
The first non-return valve and the first regulating valve are in series in the outlet main pipe of connection.
Preferably, in above-mentioned SCR flue gas denitrification system, the ammonia/air mixer includes that two be connected in parallel mix
Clutch.
Preferably, in above-mentioned SCR flue gas denitrification system, the dilution air unit includes at least two and is connected in parallel
Dilution air is in series with the second non-return valve and the second regulating valve on the outlet conduit of the dilution air.
Preferably, in above-mentioned SCR flue gas denitrification system, the primary air fan unit includes at least two and is connected in parallel
Primary air fan is in series with third regulating valve on the outlet conduit of the primary air fan.
Preferably, in above-mentioned SCR flue gas denitrification system, first regulating valve, second regulating valve and/or described
Third regulating valve is manual modulation valve.
Preferably, in above-mentioned SCR flue gas denitrification system, the manual modulation valve is Hand-operated butterfly valve or manual ball valve.
Preferably, in above-mentioned SCR flue gas denitrification system, the primary air fan unit is adjusting rotor blade blower.
It can be seen via above technical scheme that the SCR flue gas denitrification system in the application, newly establishes primary air fan all the way and goes out
Mouthful to dilution air outlet conduit, and connect on the pipeline the first non-return valve and the first regulating valve.SCR flue gas denitrification system
Load and primary air fan unit wind pressure random groups load variations and be positively correlated, primary air fan unit is in parallel with dilution air unit
Setting, can adapt to system different load state, while energy saving.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is the embodiments of the present invention, for those of ordinary skill in the art, without creative efforts, also
Other attached drawings can be obtained according to the attached drawing of offer.
Fig. 1 provides the structural schematic diagram of SCR flue gas denitrification system for the utility model embodiment.
In figure, operation dilution air A, spare dilution air A ', the first ammonia/air mixer B, the second ammonia/air mixing
Device B ', operation primary air fan C, C ', the first non-return valve 1, the first regulating valve 2.
Specific embodiment
The core of the utility model is to provide a kind of SCR flue gas denitrification system, can adapt to system different load state, together
When energy saving.
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
As shown in Figure 1, the utility model discloses a kind of SCR flue gas denitrification system, including dilution air unit and ammonia/sky
Gas mixer, further includes the primary air fan unit being arranged in parallel with dilution air unit, primary air fan unit with dilution air
The first non-return valve 1 and the first regulating valve 2 are in series in the outlet main pipe of unit connection.First non-return valve 1 is used in dilution air
Prevent dilution wind from entering in primary air fan unit when operation, the first regulating valve 2 is passed through ammonia/air for adjusting primary air fan unit
First air air quantity in mixer.
It should be noted that considering in thermal power plants starting/shutdown phase for overall cost, dilution wind is only opened
Machine unit；In normal operating phase, open primary air fan unit, shut down dilution air unit, primary air fan unit wind pressure with
Load variations and change, primary air fan unit can meet system volume of air supply at this time, and can reduce operation rotating machinery, efficiency compared with
Dilution air unit is high, reduces energy consumption.When system is under middle higher load condition, primary air fan unit wind pressure is with load variations
And change, to provide corresponding system volume of air supply.
SCR flue gas denitrification system in the application newly establishes primary air fan all the way and is exported to dilution air outlet conduit, and
It connects on the pipeline the first non-return valve 1 and the first regulating valve 2.The load and primary air fan unit wind of SCR flue gas denitrification system
It presses random groups load variations and changes, and be positively correlated, primary air fan unit is arranged in parallel with dilution air unit, can adapt to
System different load state, while energy saving.
According to actual needs, ammonia/air mixer includes two mixers being connected in parallel, two same lucks of mixer
Row, will be used for ammonia and mix with Efficient air, ammonia concentration is diluted to 5% or so, can produce higher composite rate, mixing effect
Fruit is more excellent.
In preferred specific embodiment, dilution air unit includes at least two dilution airs being connected in parallel, dilution
The second non-return valve and the second regulating valve are in series on the outlet conduit of blower.Above-mentioned configuration mode carries out interlock protection test,
Just dilution air unit commitment is run in the ignition of the boiler stage.
Dilution air unit includes an operation dilution air A and a spare dilution air A ' (fortune one is standby).
Primary air fan unit includes at least two primary air fans being connected in parallel, and is gone here and there on the outlet conduit of the primary air fan
It is associated with third regulating valve.
As shown in Figure 1, SCR flue gas denitrification system is in a specific embodiment, including operation dilution air A, one
The spare dilution air A ' of platform, first ammonia/air mixer B, second ammonia/air mixer B ', two operations are primary
Blower C, C ', wherein operation dilution air A and spare dilution air A ' is connected in parallel and is respectively in series with the on export pipeline
Two non-return valves and the second regulating valve, export pipeline and the dilution air outlet for running dilution air A and spare dilution air A ' are female
Pipe connection, the dilution air outlet main pipe other end are separately connected the first ammonia/air mixer B and the second ammonia/air mixer B '.
Operation primary air fan C and C ' is connected in parallel and respective primary air fan outlet conduit is connected to primary air fan outlet main pipe, once
The fan outlet main pipe other end leads to repeatedly with dilution air outlet main pipe interphase.Primary air fan is exported to dilution air outlet
The first non-return valve 1 and the first regulating valve 2 are in series on road.
Preferably, the first regulating valve 2, the second regulating valve and/or third regulating valve are manual modulation valve or electric control valve.
Specifically, manual modulation valve is Hand-operated butterfly valve or manual ball valve.Its structure of Hand-operated butterfly valve is simple, at low cost, adjustable
Range is larger, is suitable for large diameter pipeline；And ball valve fluid pressure loses small, good seal performance, and it is at high cost, it is commonly available to
Small-bore pipeline.
Primary air fan unit concretely adjusting rotor blade blower.Relative to Silence Process blower, adjusting rotor blade Fan Regulation
Range is big, and energy conservation is preferably.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
The foregoing description of the disclosed embodiments can be realized professional and technical personnel in the field or using originally practical new
Type.Various modifications to these embodiments will be readily apparent to those skilled in the art, and determine herein
The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause
This, the present invention will not be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The widest scope consistent with features of novelty.
Claims (7)
1. a kind of SCR flue gas denitrification system, including dilution air unit and ammonia/air mixer, which is characterized in that further include with
The primary air fan unit that the dilution air unit is arranged in parallel, the primary air fan unit connect with the dilution air unit
The first non-return valve (1) and the first regulating valve (2) are in series in the outlet main pipe connect.
2. SCR flue gas denitrification system according to claim 1, which is characterized in that the ammonia/air mixer includes parallel connection
Two mixers of connection.
3. SCR flue gas denitrification system according to claim 1, which is characterized in that the dilution air unit includes at least
Two dilution airs being connected in parallel are in series with the second non-return valve and the second regulating valve on the outlet conduit of the dilution air.
4. SCR flue gas denitrification system according to claim 3, which is characterized in that the primary air fan unit includes at least
Two primary air fans being connected in parallel are in series with third regulating valve on the outlet conduit of the primary air fan.
5. SCR flue gas denitrification system according to claim 4, which is characterized in that first regulating valve (2), described
Two regulating valves and/or the third regulating valve are manual modulation valve.
6. SCR flue gas denitrification system according to claim 5, which is characterized in that the manual modulation valve is Hand-operated butterfly valve
Or manual ball valve.
7. SCR flue gas denitrification system according to claim 1-6, which is characterized in that the primary air fan unit
For adjusting rotor blade blower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821785662.4U CN209302540U (en) | 2018-10-31 | 2018-10-31 | A kind of SCR flue gas denitrification system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821785662.4U CN209302540U (en) | 2018-10-31 | 2018-10-31 | A kind of SCR flue gas denitrification system |
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| CN209302540U true CN209302540U (en) | 2019-08-27 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021046880A1 (en) * | 2019-09-11 | 2021-03-18 | 唐山维数科技有限公司 | Flue gas denitrification system |
| CN114073884A (en) * | 2021-11-26 | 2022-02-22 | 内蒙古大唐国际克什克腾煤制天然气有限责任公司 | Air dilution device of denitration system and process thereof |
-
2018
- 2018-10-31 CN CN201821785662.4U patent/CN209302540U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021046880A1 (en) * | 2019-09-11 | 2021-03-18 | 唐山维数科技有限公司 | Flue gas denitrification system |
| CN114073884A (en) * | 2021-11-26 | 2022-02-22 | 内蒙古大唐国际克什克腾煤制天然气有限责任公司 | Air dilution device of denitration system and process thereof |
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