CN110508132A - A kind of denitrating system and method for denitration of the denitration of gas turbine unit SCR efficient - Google Patents
A kind of denitrating system and method for denitration of the denitration of gas turbine unit SCR efficient Download PDFInfo
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- CN110508132A CN110508132A CN201910889201.4A CN201910889201A CN110508132A CN 110508132 A CN110508132 A CN 110508132A CN 201910889201 A CN201910889201 A CN 201910889201A CN 110508132 A CN110508132 A CN 110508132A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2062—Ammonia
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/01—Engine exhaust gases
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Abstract
The invention discloses a kind of denitrating systems of gas turbine unit SCR efficient denitration, comprising: exhaust gases passes, upstream end thereof with gas turbine group for connecting, and end with chimney for connecting downstream；Preheating pipe, disk are placed in the upstream of exhaust gases passes, and one end with urea liquid source for connecting, and the other end is provided with spray gun, and the injection direction of spray gun and the axis direction of exhaust gases passes are consistent；Racemization device, is set in exhaust gases passes, and is located at the downstream of preheating pipe, for converting the screw of flue gas to the linear motion along exhaust gases passes；And catalyst layer, setting with exhaust gases passes in, and be located at heat-exchanging tube bundle downstream, catalyst layer be honeycomb or corrugated plate dst structure.The denitrating system has many advantages, such as that denitration efficiency height, performance stabilization, characteristics of compact layout, equipment be simple, energy conservation and environmental protection.
Description
Technical field
The invention belongs to exhaust emission control technology fields, and in particular to be a kind of gas turbine unit SCR efficient denitration
Denitrating system and method for denitration.
Background technique
Disclosing the information of the background technology part, it is only intended to increase understanding of the overall background of the invention, without certainty
It is considered as recognizing or implying in any form that information composition has become existing skill well known to persons skilled in the art
Art.
With the fast development of the whole world especially Chinese society, safe and environment-friendly and new energy becomes theme, gas-liquid-solid pollution
The discharge and improvement of object refer to unprecedented height.Gaseous contamination improvement is also become for the emission control of nitrogen oxides
The most important thing.Stringent combustion engine discharged nitrous oxides standard has all been put into effect in country Beijing, Tianjin, Shenzhen at present, and Beijing, Tianjin are all
It is required that nitrogen oxides control is in 30mg/m3Within, Shenzhen even requires nitrogen oxides control in 15mg/m3Within, Hebei will also go out
The new environmental protection index of platform.
The fuel of combustion engine is based on natural gas etc., and the flue gas of discharge has the characteristics that low dirt low-sulfur high-nitrogen, using efficient
Polluted gas ultra-low concentration discharge may be implemented in nitrogen oxides emission-reduction technology.And the SCR process system of fuel engine power generation unit and master
The design of device is wanted, the design feature of exhaust conditions and UTILIZATION OF VESIDUAL HEAT IN, the key influence factor and parameter of process modeling need to be adapted to
Setting has larger difference with coal unit, to conversion zone flow field control, high activated catalyst configuration parameter, denitrification reducing agent
Eject position and mode etc. have high requirement.
Current SCR technique, which mainly passes through heat source and draws, to be connect, and is pyrolyzed urea in the ammonia preparation facilities outside combustion engine, is prepared
Ammonia, then sprayed into flue by ammonia-spraying grid and carry out denitration.Processes and apparatus is complicated, takes up a large area, and heat source, which draws, to be connect and ammonia
Gas preparation storage is difficult, and system pipeline is complicated, it is difficult to meet the compact Layout requirement of combustion engine.Urea pyrolysis response is too long, and heat
Solution reactor longtime running easily goes wrong, to influence the denitration efficiency of combustion engine.In addition, by ammonia-spraying grid it is difficult to ensure that cigarette
The mixing uniformity and completeness of gas and ammonia, and make flue flow field situation complicated, contact of the catalyst with flue gas is not filled
Point, reduce denitration efficiency.
Summary of the invention
In order to solve the technical problems existing in the prior art, the object of the present invention is to provide a kind of gas turbine units
The denitrating system and method for denitration of SCR efficient denitration.The denitrating system has denitration efficiency height, performance stabilization, characteristics of compact layout, sets
The advantages that standby simple, energy conservation and environmental protection.
To achieve the goals above, the technical solution of the present invention is as follows:
A kind of denitrating system of gas turbine unit SCR efficient denitration, comprising:
Exhaust gases passes, upstream end thereof with gas turbine group for connecting, and end with chimney for connecting downstream；
Preheating pipe, disk are placed in the upstream of exhaust gases passes, and for connecting with urea liquid source, the other end is provided with one end
Spray gun, the injection direction of spray gun and the axis direction of exhaust gases passes are consistent；
Racemization device, is set in exhaust gases passes, and is located at the downstream of preheating pipe, for turning the screw of flue gas
Turn to the linear motion along exhaust gases passes；
And catalyst layer, setting with exhaust gases passes in, and be located at heat-exchanging tube bundle downstream, catalyst layer be honeycomb knot
Structure or corrugated plate dst structure.
Combustion turbine exhaustion temperature is higher, and preheating pipe is arranged in the upstream of exhaust gases passes, urea liquid is injected and is preheated
In pipeline after preheating, temperature is up to 300-400 DEG C, it is easier to realize the atomization and pyrolysis of subsequent urea liquid.
The flue gas of gas turbine discharge is helical flow, and the urea liquid after atomization is sprayed along the axis direction of exhaust gases passes
Enter in the flue gas of helical flow, due to atomization after urea droplets injection direction and flue gas local flow direction difference compared with
Greatly, under the disturbance of flue gas, it is easier to be uniformly mixed with flue gas.Finely dispersed urea droplets are easier to divide after being heated evenly
Solution.
After urea decomposes completely, the ammonia that flue gas carries after decomposing flows through racemization device, and racemization device plays rotation to flue gas
The integration for turning air-flow, forward by spiral by mixed flue gas, turn to along flue it is straight it is forward move, further promote cigarette
The mixing of gas and ammonia, and keep smoke distribution uniform, catalyst layer is entered with excellent flow field characteristic, to improve denitrating flue gas
Uniformity coefficient, and mitigate the percussion to catalyst layer, carry out denitrating flue gas process more steadily, effectively.Catalyst layer
For honeycomb or corrugated board structures, there is biggish specific surface area, fluid resistance loss can be reduced, cigarette can be significantly improved
Gas denitration efficiency.
In some embodiments, the denitrating system contains the heat-exchanging tube bundles such as the superheater of waste heat boiler, economizer, heat exchange
Tube bank is set in exhaust gases passes, and between racemization device and catalyst layer.
Since flue inner wall can generate certain frictional resistance to the flue gas of flowing, so close to the flue gas stream of flue inner wall
Speed is slower, and more difficult is uniformly mixed with ammonia.So when heat-exchanging tube bundle is arranged in upstream on a catalyst, it on the one hand can be to cigarette
Waste heat in gas is recycled, and the waste of energy is reduced, and flue-gas temperature is adjusted to the suitable temperature of denitrating flue gas, improves cigarette
The denitration efficiency of gas；On the other hand rectified action is played to the flowing of flue gas, is uniformly mixed flue gas further with ammonia, and make
The mixed gas of flue gas and ammonia is evenly distributed in entire flue cross section, when using catalyst layer, can not only make to be catalyzed
Each position of oxidant layer is all utilized effectively, and the uniformity coefficient of denitrating flue gas can be improved.
In some embodiments, the spray gun is air atomization spray gun.Air atomization spray gun can be such that ammonia spirit is atomized
It is more uniform.
Further, the quantity of the spray gun is 2-10, and multiple spray guns are uniform in the cross section upper annular of exhaust gases passes
Distribution.
Further, the circle where multiple spray guns and exhaust gases passes are concentric circles.
Spray gun is uniformly distributed on the concentric circles of exhaust gases passes, can by urea liquid multiple spot, more equably spray into cigarette
In gas, it is easier to realize being uniformly mixed for flue gas and urea liquid.
In some embodiments, the racemization device is internally provided with several rectification channels, each rectification channel
Axis is parallel with the axis of the exhaust gases passes, and is provided at least one straightener(stator) blade in each rectification channel.
Straightener(stator) blade is fixed on rectification channel, is rectified channel for air-flow and is divided into draft, by the parabolic of blade
Face shape makes angular speed of the swirling eddy on blade face by collision reaction abatement rotation, and the air-flow for converting rotation is along axial fortune
The direction of dynamic straight air-flow, blade is opposite with combustion engine intra vane direction.
Further, the straightener(stator) blade is parabolic shape, the length direction of straightener(stator) blade and the flow direction of flue gas
Vertically.
Inside racemization device setting several rectify channels, it is several at this, can for 4,5,6,7 even more
It is multiple.Flue gas is divided into several pieces to rectify, is easier to carry out the rectification of flue gas, and makes each position in flue gas section
Setting successfully to rectify.
Further, the internal diameter in each rectification channel is the internal diameter in each rectification channel are as follows:
Wherein W is the width of flue, and n is the number for rectifying channel；
Rectify the length in channel are as follows: LZ=(16~20) × d, wherein d is the internal diameter for rectifying channel, and rectification passage length is protected
Uniform axial straight air-flow is turned to after card rectification.
In some embodiments, since the dust content of gas turbine is extremely low, thus choose inner wall thickness be 0.6~
The thin-walled catalyst layer of 0.7mm, can reduce cost.Catalyst uses multi-tier arrangement, such as uses 4+1 arrangement.
In some embodiments, the distance between the spray gun and racemization device meet following requirements:
Wherein, m is the quality for single spray gun unit time spraying urea liquid；ρ is the mass density of urea liquid；T is
The urea liquid is pyrolyzed the required time under the flue-gas temperature；D1The diameter of a circle surrounded for multiple spray guns.
A kind of method of denitration of gas turbine unit SCR efficient denitration, includes the following steps:
Urea liquid is preheated to 300-400 DEG C under the heat effect of high-temperature flue gas, and the urea liquid after preheating is by spray
Rifle atomized spray is thermally decomposed into ammonia during mixing with flue gas into the flue gas of spiral flow forward；
After urea decomposes completely, the mixed gas of flue gas and ammonia flows through racemization device and is rectified, and transports spiral forward
It is dynamic to be rectified into linear motion, it is uniformly mixed flue gas with ammonia；
Mixed uniformly mixed gas is after waste heat recycles, into catalyst layer, catalytic denitration.
In some embodiments, uniform concentration distribution of the ammonia in flue gas need to meet it is claimed below:
On the cross section at the 0.5m of catalyst layer upstream, maximum deviation coefficient CV≤5% of ammonia concentration VELOCITY DISTRIBUTION,
Wherein: Mean concentration；Vi: sampled value；N sampling number.
The invention has the benefit that
1) process flow of combustion engine SCR denitration is simplified.Ammonia is directly generated in flue by urea pyrolysis, eliminates system
The process of standby ammonia and spray ammonia, reduces the operating time of combustion engine denitration, improves work efficiency.
2) technique directly sprayed using urea is not needed complicated bulky ammonia gas generating device, makes denitrating system more
Succinctly, cost is reduced.The storage transport of urea is more convenient compared with ammonia, avoids pollution caused by ammonia leakage.
3) combustion turbine exhaustion feature is made full use of, mixes urea and flue gas naturally uniformly using the screw of flue gas
It closes, the preheating and pyrolysis of urea is carried out using fume afterheat, it is higher compared with ammonia-spraying grid that ammonia mixes with flue gas the uniformity, effectively
Improve denitration efficiency.
4) flue gas of spiral can be rectified using racemization device, eliminates the rotation of flue gas, to realize pair
The flow fieldoptimization of entire exhaust gases passes；In addition partial fume heat-exchanging tube bundle is added in waste heat boiler, on the one hand urea can be made molten
Liquid preheating can be such that flue gas further rectifies with fast pyrogenation, another aspect heat-exchanging tube bundle, and flue gas flow field is optimised；It reaches
Before catalyst layer, flue gas in flue is evenly distributed, and ammonia is sufficiently mixed with flue gas, and ammonia and flue gas mix deviations compare conventional spray
Ammonia system more optimizes.
Detailed description of the invention
The Figure of description for constituting a part of the invention is used to provide further understanding of the present invention, and of the invention shows
Examples and descriptions thereof are used to explain the present invention for meaning property, does not constitute improper limitations of the present invention.
Fig. 1 is the SCR denitration process flow chart of the embodiment of the present invention；
Fig. 2 is the structural schematic diagram of the air atomization spray gun of the embodiment of the present invention；
Fig. 3 is arrangement schematic diagram of the spray gun in flue in the embodiment of the present invention；
Fig. 4 is the structural schematic diagram of racemization device in the embodiment of the present invention；
Fig. 5 is the structural schematic diagram of the cross section of racemization device in the embodiment of the present invention；
Fig. 6 is the structural schematic diagram of blade in the embodiment of the present invention.
In figure: 1. gas turbine flues, 2. preheating pipes, 3. spray guns, 4. racemization devices, 5. heat-exchanging tube bundles, 6. catalyst
Layer, 7. back-end ductworks, 8. chimneys, 9. conduits, 10. exhaust gases passes.
Specific embodiment
It is noted that described further below be all exemplary, it is intended to provide further instruction to the present invention.Unless another
It indicates, all technical and scientific terms used herein has usual with general technical staff of the technical field of the invention
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to exemplary embodiments of the present invention.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
As shown in Figure 1, a kind of denitrating system of gas turbine unit SCR efficient denitration, comprising:
Exhaust gases passes 10, upstream end thereof are connect by gas turbine flue 1 with gas turbine group, and end is used for downstream
It is connect with chimney 8 or flue gas processing device；
Preheating pipe 2, disk are placed in the upstream of exhaust gases passes 10, and for connecting with urea liquid source, the other end is set one end
It is equipped with spray gun 3, the injection direction of spray gun 3 and the axis direction of exhaust gases passes are consistent；As shown in Fig. 2, spray gun 3 is air atomizing spray
Rifle.As shown in figure 3, air atomization spray gun can make ammonia spirit atomization more uniform；The quantity of spray gun 3 is 2-10, such as 2
A, 3,4,5,6,7,8,9,10, multiple spray guns 3 uniformly divide in the cross section upper annular of exhaust gases passes
Cloth；Circle and exhaust gases passes where multiple spray guns 3 are concentric circles.
Spray gun 3 is uniformly distributed on the concentric circles of exhaust gases passes 10, can be by urea liquid multiple spot, more equably spray into
In flue gas, it is easier to realize being uniformly mixed for flue gas and urea liquid.
Racemization device 4 as shown in figure 4, being set in exhaust gases passes 10, and is located at the downstream of preheating pipe 2, is used for cigarette
The screw of gas is converted into the linear motion along exhaust gases passes；The distance between the spray gun and racemization device meet following want
It asks:
Wherein, m is the quality for single spray gun unit time spraying urea liquid；ρ is the mass density of urea liquid；T is
The urea liquid is pyrolyzed the required time under the flue-gas temperature；D1The diameter of a circle surrounded for multiple spray guns.
As shown in figure 5, racemization device 4 is internally provided with several rectification channels, the axis in each rectification channel and institute
The axis for stating exhaust gases passes is parallel, and is provided at least one straightener(stator) blade in each rectification channel.Straightener(stator) blade is paraboloid
Shape, straightener(stator) blade is vertical with the flow direction of flue gas, as shown in Figure 6.Straightener(stator) blade is fixed on rectification channel, by blade
Parabolic shape make swirling eddy on blade face by collision reaction abatement rotation angular speed, convert rotation air-flow be edge
The straight air-flow being axially moved.
Inside racemization device setting several rectify channels, it is several at this, can for 4,5,6,7 even more
It is multiple.Flue gas is divided into several pieces to rectify, is easier to carry out the rectification of flue gas, and makes each position in flue gas section
Setting successfully to rectify.
The internal diameter in each rectification channel are as follows:
Wherein W is the width of flue, and n is the number for rectifying channel；
Rectify the length in channel are as follows: LZ=(16~20) × d, wherein d is the internal diameter for rectifying channel.
Heat-exchanging tube bundle 5 is set in exhaust gases passes 10, and between racemization device 4 and catalyst layer 6, heat-exchanging tube bundle 5
It is connect with waste heat boiler 7.
And catalyst layer 6, setting with exhaust gases passes in, and be located at heat-exchanging tube bundle 5 downstream, catalyst layer 6 be honeycomb
Structure or corrugated plate dst structure；The catalyst layer 6 since the dust content of gas turbine is extremely low, therefore chooses inner wall thickness
For the thin-walled catalyst layer of 0.6~0.7mm, cost can be reduced.Catalyst uses multi-tier arrangement, such as uses 4+1 arrangement.
Gas turbine flue gas enters exhaust gases passes by gas turbine flue 1, and preheats the urine in urea liquid preheating pipe 2
Plain solution, it is therefore an objective to promote the atomization and pyrolysis of urea liquid, temperature should be preheating between 150-200 DEG C.Urine after preheating
Plain solution is flow to after atomizing lance 3 is atomized through conduit 9 enters flue.In flue, the urea droplets cigarette next with screw
Gas mixing.Since the flue-gas temperature of combustion engine is higher, generally between 500-900 DEG C, urea liquid evaporation pyrolysis generates ammonia.Through
After crossing sufficiently long flue (urea liquid is made sufficiently to evaporate pyrolysis), mixed gas becomes uniform by airflow rectifier 4
Waste heat boiler 7 axially is flowed into, is exchanged heat at exchanging pipe of boiler by waste beam 5, the catalyst in waste heat boiler SCR denitration part
Denitration at layer 6, last processed flue gas enter the discharge of chimney 8.
Urea liquid on flue atomizing lance shown in layout drawing 2 by atomization after spray into flue in.The arrangement of spray gun
Signal is as shown in figure 3, use eight spray guns to be evenly arranged in diameter as D1Rounded face on, the atomized drop that spray gun sprays is horizontal
Into flue, evaporation pyrolysis is ammonia under the action of high-temperature flue gas.
In evaporation pyrolytic process, ammonia obtains a degree of mix with flue gas.To optimize flow field, improves and be uniformly mixed
Degree installs racemization device 4 additional before waste heat boiler 7.Install the straightener(stator) blade of paraboloidal additional by board-like rectifier and in pipeline,
Become the air-flow of rotation after shaping along axial Uniform Flow, optimizes flue flow field.It is remaining after gasotron
Heat boiler heat-exchanging tube bundle 5 can be improved ammonia and mix with flue gas the uniformity, and the flue gas in flow field is more uniform, also be effectively reduced
The escape amount of ammonia.
The examination face of the uniform concentration distribution of ammonia is the cross section at first layer catalyst surface upstream 0.5m, it is desirable that should
The maximum deviation coefficient (CV)≤5% of the ammonia density VELOCITY DISTRIBUTION of section part.CV's is defined as:
Wherein: Mean concentration；Vi: sampled value；N sampling number.
By the effect of airflow rectifier and exchanging pipe of boiler by waste beam, the mixing uniformity of flue gas and ammonia be can reach
(CV)≤5% index request can make rectification degree of mixing higher, flue gas flow field is more without adding ammonia-spraying grid and deflector
Optimization.
Catalyst layer 6 need to select the honeycomb or corrugated plate dst catalyst of bigger serface, keep ammonia abundant with nitrogen oxides
Reaction reduces fluid resistance loss, improves flue gas utilization efficiency, achievees the purpose that high efficiency denitration.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of denitrating system of gas turbine unit SCR efficient denitration, it is characterised in that: include:
Exhaust gases passes, upstream end thereof with gas turbine group for connecting, and end with chimney for connecting downstream；
Preheating pipe, disk are placed in the upstream of exhaust gases passes, and for one end for connecting with urea liquid source, the other end is provided with spray
Rifle, the injection direction of spray gun and the axis direction of exhaust gases passes are consistent；
Racemization device, is set in exhaust gases passes, and is located at the downstream of preheating pipe, for converting the screw of flue gas to
Along the linear motion of exhaust gases passes；
And catalyst layer, setting with exhaust gases passes in, and be located at heat-exchanging tube bundle downstream, catalyst layer be honeycomb or
Corrugated plate dst structure.
2. the denitrating system of gas turbine unit SCR efficient denitration according to claim 1, it is characterised in that: further include
The superheater and/or economizer of waste heat boiler, superheater and/or economizer are set in exhaust gases passes, and are located at racemization device
Between catalyst layer.
3. the denitrating system of gas turbine unit SCR efficient denitration according to claim 1, it is characterised in that: the spray
Rifle is air atomization spray gun；
Further, the quantity of the spray gun is 2-10, and multiple spray guns are uniformly distributed in the cross section upper annular of exhaust gases passes；
Further, the circle where multiple spray guns and exhaust gases passes are concentric circles.
4. the denitrating system of gas turbine unit SCR efficient denitration according to claim 1, it is characterised in that: described to disappear
Cyclone is internally provided with several rectification channels, and the axis in each rectification channel is parallel with the axis of the exhaust gases passes,
And at least one straightener(stator) blade is provided in each rectification channel.
5. the denitrating system of gas turbine unit SCR efficient denitration according to claim 4, it is characterised in that: described whole
Stream blade is parabolic shape, and the length direction of straightener(stator) blade and the flow direction of flue gas are vertical.
6. the denitrating system of gas turbine unit SCR efficient denitration according to claim 4, it is characterised in that: each whole
The internal diameter of circulation road are as follows:
Wherein W is the width of flue, and n is the number for rectifying channel；
Rectify the length in channel are as follows: LZ=(16~20) × d, wherein d is the internal diameter for rectifying channel.
7. the denitrating system of gas turbine unit SCR efficient denitration according to claim 1, it is characterised in that: described to urge
The inner wall thickness of agent layer is the thin-walled of 0.6~0.7mm, and catalyst uses multi-tier arrangement.
8. the denitrating system of gas turbine unit SCR efficient denitration according to claim 1, it is characterised in that: the spray
The distance between rifle and racemization device meet following requirements:
Wherein, m is the quality for single spray gun unit time spraying urea liquid；ρ is the mass density of urea liquid；T is the urine
Plain solution is pyrolyzed the required time under the flue-gas temperature；D1The diameter of a circle surrounded for multiple spray guns.
9. a kind of method of denitration of gas turbine unit SCR efficient denitration, characterized by the following steps:
Urea liquid is preheated to 300-400 DEG C under the heat effect of high-temperature flue gas, and the urea liquid after preheating passes through spray gun mist
Change is ejected into the flue gas of spiral flow forward, is thermally decomposed into ammonia during mixing with flue gas；
After urea decomposes completely, the mixed gas of flue gas and ammonia flows through racemization device and is rectified, and so that spiral is travelled forward whole
Stream is linear motion, is uniformly mixed flue gas with ammonia；
Mixed uniformly mixed gas is after waste heat recycles, into catalyst layer, catalytic denitration.
10. the method for denitration of gas turbine unit SCR efficient denitration according to claim 9, it is characterised in that: ammonia exists
Meeting for uniform concentration distribution in flue gas is claimed below:
On the cross section at the 0.5m of catalyst layer upstream, maximum deviation coefficient CV≤5% of ammonia concentration VELOCITY DISTRIBUTION,
Wherein: Mean concentration；Vi: sampled value；N sampling number.
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| CN115715928A (en) * | 2022-11-18 | 2023-02-28 | 江苏华南新能源科技有限公司 | Denitration equipment for gas turbine waste heat boiler |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102228793A (en) * | 2011-05-04 | 2011-11-02 | 上海电气石川岛电站环保工程有限公司 | Rectification grille for protecting fly ash particles on catalyst layer of SCR (Semiconductor Control Rectifier) denitration device |
| CN102410542A (en) * | 2011-12-27 | 2012-04-11 | 华南理工大学 | Waste incinerator urea spray gun prevents back leak pullover |
| CN102631849A (en) * | 2012-04-17 | 2012-08-15 | 哈尔滨工程大学 | Pre-heating spray-hole type static mixer |
| JP2014101869A (en) * | 2012-11-22 | 2014-06-05 | Toyota Industries Corp | Exhaust emission control system |
| US20150041014A1 (en) * | 2013-03-15 | 2015-02-12 | Honeywell International Inc. | Specialized ammonia injection grid with the dual purpose of suppressing noise |
| KR101724950B1 (en) * | 2015-11-19 | 2017-04-07 | 현대자동차주식회사 | Urea dosing injector cooling apparatus and method using the cooling water in reservoir tank |
| JP2017180298A (en) * | 2016-03-30 | 2017-10-05 | 日本碍子株式会社 | Reducer injection device, and exhaust gas treatment method |
| CN107261802A (en) * | 2017-08-11 | 2017-10-20 | 河南海力特机电制造有限公司 | Heavy pressure fine spray SNCR denitration system |
| CN107448962A (en) * | 2017-08-10 | 2017-12-08 | 江苏鲲鹏环保工程技术有限公司 | A kind of outer denitrating technique system of chain furnace high/low temperature flue gas holding furnace |
| CN206868015U (en) * | 2017-03-21 | 2018-01-12 | 华电电力科学研究院 | SCR denitration system SO can be reduced2/SO3The urea pyrolysis ammonia structure of conversion ratio |
| CN107899411A (en) * | 2017-09-29 | 2018-04-13 | 浙江省环境保护科学设计研究院 | A kind of SCR reaction units and method for the processing of cement clinker production line kiln exit gas |
| CN207913517U (en) * | 2017-07-07 | 2018-09-28 | 山东奥能电力科技有限公司 | A kind of tower urea composite hydrolysis reaction system of denitration |
| CN209378806U (en) * | 2018-10-16 | 2019-09-13 | 中国华电科工集团有限公司 | A kind of low energy consumption afterburning heated type denitrating system |
-
2019
- 2019-09-19 CN CN201910889201.4A patent/CN110508132B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102228793A (en) * | 2011-05-04 | 2011-11-02 | 上海电气石川岛电站环保工程有限公司 | Rectification grille for protecting fly ash particles on catalyst layer of SCR (Semiconductor Control Rectifier) denitration device |
| CN102410542A (en) * | 2011-12-27 | 2012-04-11 | 华南理工大学 | Waste incinerator urea spray gun prevents back leak pullover |
| CN102631849A (en) * | 2012-04-17 | 2012-08-15 | 哈尔滨工程大学 | Pre-heating spray-hole type static mixer |
| JP2014101869A (en) * | 2012-11-22 | 2014-06-05 | Toyota Industries Corp | Exhaust emission control system |
| US20150041014A1 (en) * | 2013-03-15 | 2015-02-12 | Honeywell International Inc. | Specialized ammonia injection grid with the dual purpose of suppressing noise |
| KR101724950B1 (en) * | 2015-11-19 | 2017-04-07 | 현대자동차주식회사 | Urea dosing injector cooling apparatus and method using the cooling water in reservoir tank |
| JP2017180298A (en) * | 2016-03-30 | 2017-10-05 | 日本碍子株式会社 | Reducer injection device, and exhaust gas treatment method |
| CN206868015U (en) * | 2017-03-21 | 2018-01-12 | 华电电力科学研究院 | SCR denitration system SO can be reduced2/SO3The urea pyrolysis ammonia structure of conversion ratio |
| CN207913517U (en) * | 2017-07-07 | 2018-09-28 | 山东奥能电力科技有限公司 | A kind of tower urea composite hydrolysis reaction system of denitration |
| CN107448962A (en) * | 2017-08-10 | 2017-12-08 | 江苏鲲鹏环保工程技术有限公司 | A kind of outer denitrating technique system of chain furnace high/low temperature flue gas holding furnace |
| CN107261802A (en) * | 2017-08-11 | 2017-10-20 | 河南海力特机电制造有限公司 | Heavy pressure fine spray SNCR denitration system |
| CN107899411A (en) * | 2017-09-29 | 2018-04-13 | 浙江省环境保护科学设计研究院 | A kind of SCR reaction units and method for the processing of cement clinker production line kiln exit gas |
| CN209378806U (en) * | 2018-10-16 | 2019-09-13 | 中国华电科工集团有限公司 | A kind of low energy consumption afterburning heated type denitrating system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115715928A (en) * | 2022-11-18 | 2023-02-28 | 江苏华南新能源科技有限公司 | Denitration equipment for gas turbine waste heat boiler |
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