CN107789984B - A kind of denitrating system and method for gas turbine - Google Patents
A kind of denitrating system and method for gas turbine Download PDFInfo
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- CN107789984B CN107789984B CN201711038818.2A CN201711038818A CN107789984B CN 107789984 B CN107789984 B CN 107789984B CN 201711038818 A CN201711038818 A CN 201711038818A CN 107789984 B CN107789984 B CN 107789984B
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 135
- 239000007789 gas Substances 0.000 claims abstract description 81
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims abstract description 40
- 238000006243 chemical reaction Methods 0.000 claims abstract description 39
- 239000003546 flue gas Substances 0.000 claims abstract description 35
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 32
- 238000002485 combustion reaction Methods 0.000 claims abstract description 23
- 230000007246 mechanism Effects 0.000 claims abstract description 19
- 238000010531 catalytic reduction reaction Methods 0.000 claims abstract description 15
- 230000002829 reductive effect Effects 0.000 claims abstract description 12
- 238000003851 corona treatment Methods 0.000 claims abstract description 5
- 238000006722 reduction reaction Methods 0.000 claims description 14
- 230000009467 reduction Effects 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 11
- 239000000446 fuel Substances 0.000 claims description 8
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 5
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 4
- 239000004202 carbamide Substances 0.000 claims description 4
- 239000000567 combustion gas Substances 0.000 claims description 4
- 238000009738 saturating Methods 0.000 claims description 4
- 150000003254 radicals Chemical class 0.000 description 15
- 239000003795 chemical substances by application Substances 0.000 description 9
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 8
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- -1 nitrogenous oxygen Compound Chemical class 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005662 electromechanics Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000009832 plasma treatment Methods 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
Classifications
-
- 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
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9404—Removing only nitrogen compounds
- B01D53/9409—Nitrogen oxides
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use
-
- 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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Analytical Chemistry (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Treating Waste Gases (AREA)
- Exhaust Gas After Treatment (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The present invention provides a kind of denitrating system of gas turbine and method, which includes: gas turbine and reducing agent feeding mechanism.Denitrification reducing agent is provided into turbine using the reducing agent output pipe at the turbine level-one movable vane piece rear portion for being connected to gas turbine；Nitrogen oxides in the combustion chamber discharge flue gas of gas turbine contacts in gas turbine turbine with denitrification reducing agent carries out selective non-catalytic reduction reaction, completes the denitration to flue gas.Wherein reducing agent can generate more polyradical, by corona treatment before entering turbine reaction conducive to the progress of denitration reaction.Utilize technical solution provided by the invention, due to realizing denitration in gas turbine turbine, it is fast to take full advantage of pressure height, revolving speed in gas turbine turbine, not only facilitate the mixing of reducing agent and flue gas, promote denitration reaction, denitration efficiency is improved, equipment for after-treatment can also be reduced, reduces system complexity and equipment investment expense.
Description
Technical field
The present invention relates to denitration method for flue gas, more particularly to the denitrating system and method for a kind of gas turbine.
Background technique
A kind of advanced generation mode by the combined cycle generation of core of gas turbine, have high-efficient, start and stop it is fast,
The pollutant feature low compared with coal fired power plant, plays an important role in energy-saving and emission-reduction.The development trend of modern gas turbines is
It improves turbine-inlet temperature (combustor exit temperature), to improve efficiency.But combustor exit temperature raising will discharge nitrogenous oxygen
Compound (NOx) higher flue gas.NOxOne of major pollutants as discharge of gas turbine, can cause acid rain, photochemical pollution
And haze problem, it is detrimental to health.
At present there are mainly two types of thermal power station's flue gas post-processing approach: selective non-catalytic reduction (selective non-
Catalytic reduction SNCR) and selective catalytic reduction (selective catalytic reduction, SCR).
The operating temperature section of SNCR is about 800 to 1200 DEG C, and the operation interval of SCR is generally at 300 to 400 DEG C.Gas turbine is saturating
Flat exit gas temperature is about 500 to 600 DEG C, the operating temperature section lower than SNCR, thus Gas Turbine Combined-cycle Power Plant
Generally use SCR method.However SCR method denitration needs that expensive catalyst, equipment investment be big, the higher pressure loss and lead
The disadvantages of causing decrease of power generation.In addition, increasing with renewable energy (such as solar energy, wind-powered electricity generation), power grid needs combustion gas wheel
Electromechanics station frequent start-stop carries out peak regulation, the NO in gas turbine start-up coursexDischarge is also taken seriously.For example, European Union in recent years
Start the NO of limitation combustion engine startup stagexDischarge, SCR after-treatment device temperature in gas turbine startup stage is lower, can not
Effectively work.
Summary of the invention
It is an object of the present invention to provide a kind of denitrating system of gas turbine, SCR and SNCR reaction can be reduced
Device.
A further object of the present invention is to the pressure losses to be reduced, and improve gas turbine proficiency.
Another further object of the present invention is to provide the method for denitration in a kind of gas turbine turbine, improve out of stock
Efficiency.
Particularly, the present invention provides a kind of denitrating systems of gas turbine, comprising:
Gas turbine comprising compressor, combustion chamber and gas turbine turbine, gas turbine turbine are used for combustion chamber
The energy that fuel combustion generates is converted into mechanical energy；Reducing agent feeding mechanism is used to provide in reduction burning discharge flue gas
Nitrogen oxides denitrification reducing agent, and the reducing agent output pipe of reducing agent feeding mechanism is connected to the turbine of gas turbine
Level-one movable vane piece rear portion, so that nitrogen oxides is reduced in gas turbine turbine.
Preferably, reducing agent feeding mechanism includes: reducing agent storage tank, for storing denitrification reducing agent；Evaporator, with reduction
Agent storage tank connection, for the denitrification reducing agent of liquid to be evaporated to gaseous state denitrification reducing agent；Gaseous state denitrification reducing agent passes through reduction
Agent output pipe is delivered to the turbine level-one movable vane piece rear portion of gas turbine.
Preferably, reducing agent feeding mechanism further include: check valve, for controlling the conveying gaseous state denitration of reducing agent output pipe
Reducing agent is to the level-one movable vane piece rear portion of gas turbine turbine.
Preferably, reducing agent feeding mechanism further includes plasma reactor, set on the reducing agent of reducing agent feeding mechanism
In the bypass of output pipe, it is anti-to flow through plasma for denitrification reducing agent after corona treatment is provided for gas turbine turbine
Device denitrification reducing agent is answered to account for the 0~100% of denitrification reducing agent quality total amount；Flow divider, for adjusting the gaseous state of evaporator output
Denitrification reducing agent branches to the mass ratio in reducing agent output pipe and its bypass.
Preferably, reducing agent feeding mechanism further includes plasma reactor power supply, is electrically connected with plasma reactor
Electric energy is provided for it.
The present invention also provides the method for denitration in a kind of gas turbine turbine, including the use of being connected to the saturating of gas turbine
The reducing agent output pipe at flat level-one movable vane piece rear portion provides denitrification reducing agent into turbine；Cigarette is discharged in the combustion chamber of gas turbine
Nitrogen oxides in gas contacts in gas turbine turbine with denitrification reducing agent carries out selective non-catalytic reduction reaction, completion pair
The denitration of flue gas.
Preferably, method of denitration further includes, before denitrification reducing agent and nitrogen oxides haptoreaction, through plasma reaction
Device processing, generates free radicals, and promotes denitration reaction.
Preferably, by mass percentage, it is total that the denitrification reducing agent handled through plasma reactor accounts for denitrification reducing agent
The 0~100% of amount.
Preferably, the urea liquid that denitrification reducing agent is concentrated ammonia liquor or mass fraction is 45~60%.
Out of stock system of the invention makes full use of in gas turbine turbine due to realizing denitration in gas turbine turbine
Pressure is high, revolving speed is fast, facilitates the mixing of reducing agent and flue gas, promotes denitration reaction, it is possible to reduce equipment for after-treatment, such as SCR
With SNCR reactor and complicated spray equipment, system complexity and equipment investment expense are not only reduced, but also is avoided
Droop loss in equipment for after-treatment is conducive to the efficiency for improving gas turbine.
Further, denitrating system of the invention, can the denitration in gas turbine start-up course, inside turbine at this time
Reached denitration reaction required temperature, avoids NO in gas turbine startup programxDischarge.
The present invention also provides a kind of method of denitration in gas turbine turbine, NO in flue gasxIt is straight with denitrification reducing agent
The progress selective non-catalytic reduction reaction in turbine is connect, the denitration to the flue gas is completed and not only subtracts compared with prior art
Equipment needed for having lacked reaction, and simplify reaction process, make reaction process operation easier to control.
Further, method of denitration of the invention, before denitrification reducing agent carries out selective non-catalytic reduction reaction, warp
The pretreatment for crossing plasma reactor, generates free radicals, and promotes denitration reaction, improves denitration efficiency.
According to the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will be brighter
The above and other objects, advantages and features of the present invention.
Detailed description of the invention
Some specific embodiments of the present invention is described in detail by way of example and not limitation with reference to the accompanying drawings hereinafter.
Identical appended drawing reference denotes same or similar part or part in attached drawing.It should be appreciated by those skilled in the art that these
What attached drawing was not necessarily drawn to scale.In attached drawing:
Fig. 1 is the schematic diagram of denitrating system of the invention；
Fig. 2 is the flow diagram of denitrating system shown in FIG. 1；
Fig. 3 is the flow diagram of method of denitration of the invention.
Specific embodiment
Fig. 1 is the schematic diagram of denitrating system according to an embodiment of the invention.This denitrating system 10 includes
Gas turbine 100, for skilled person will appreciate that, gas turbine 100 includes: gas turbine blower 110, continuously from
Air is sucked in atmosphere and is compressed it；Gas-turbine combustion chamber 120, fuel with from the gas turbine blower 110
Air is mixed and burned；Gas turbine turbine 130, the energy that 120 fuel combustion of gas-turbine combustion chamber is generated convert
For mechanical energy, converts the energy of fuel in the flue gas generated after mechanical energy and contain nitrogen oxides.It is general, gas turbine
It is also connected with generator 300 after turbine 130, converts power output for mechanical energy.
In some embodiments, denitrating system 10 of the invention further includes reducing agent feeding mechanism 200, is used to provide also
The denitrification reducing agent of nitrogen oxides in original burning discharge flue gas comprising reducing agent storage tank 210 and evaporator 220 are stored in
The liquid denitrification reducing agent of reducing agent storage tank 210 is evaporated to gaseous state after evaporator 220, and it is saturating that gaseous reducing agent inputs gas turbine
The rear portion of flat 130 level-one movable vanes, so that nitrogen oxides is reduced in gas turbine turbine 130.
Particularly, the SNCR reaction in the present invention is carried out in gas turbine turbine 130, and denitrification process makes full use of combustion
Pressure height, revolving speed are fast in gas-turbine turbine 130, facilitate the mixing of reducing agent and flue gas, promote denitration reaction, it is possible to reduce after
Processing equipment not only reduces system complexity and equipment investment expense such as SCR and SNCR reactor and complicated spray equipment
With, and the droop loss in equipment for after-treatment is also avoided, be conducive to the efficiency for improving gas turbine 100.
In addition, since the denitrification process in the present invention is carried out in gas turbine turbine 130, the present invention provides
Denitrating system 10, also can the denitration in 100 start-up course of gas turbine, it is anti-to have reached denitration inside turbine 130 at this time
Required temperature is answered, NO in 100 startup program of gas turbine is avoidedxDischarge.
In other embodiments of denitrating system 10 provided by the invention, also set up in reducing agent feeding mechanism 200
Have plasma reactor 230, provide the denitrification reducing agent after corona treatment for gas turbine turbine 130, flow through etc. from
230 denitrification reducing agent of daughter reactor accounts for the 0~100% of denitrification reducing agent quality total amount.Plasma-treated reduction
Agent can produce more reduction free radicals, accelerates denitration reaction, improves denitration efficiency.
Particularly, denitrating system 10 of the invention further includes plasma reactor power supply 240, and the power supply used is AC/
DC power supply provides electric energy for plasma reactor 230.
Fig. 2 shows the flow diagrams of denitrating system 10 of the invention.In some embodiments, air is through compressor pressure
After contracting enter fuel chambers, fuel combustion chamber 120 burn after generate flue gas be sent into gas turbine turbine 130 in, with from also
The reducing agent haptoreaction denitration that former agent feeding mechanism 200 provides, the energy of the flue gas after denitration are converted into generator 300
Power output.
Wherein reducing agent feeding mechanism 200 includes reducing agent storage tank 210, evaporator 220 and reducing agent output pipe.Reduction
Agent storage tank 210 is concentrated ammonia liquor or urea liquid for storing denitrification reducing agent, the denitrification reducing agent of storage；Evaporator 220 with also
Former agent storage tank 210 is connected by transport pump, for the denitrification reducing agent of liquid to be evaporated to gaseous state；The connection of reducing agent output pipe
The rear portion of 130 level-one movable vane of evaporator 220 and gas turbine turbine, gaseous denitrification reducing agent is provided into turbine 130, so that
Nitrogen oxides is obtained to be reduced in gas turbine turbine 130.
Particularly, the denitration reaction of flue gas and reducing agent occur gas turbine turbine 130 level-one movable vane rear portion, because
For at the rear portion of level-one movable vane, the temperature of flue gas is about 800 to 1200 DEG C, and in this temperature range, it is anti-to be able to carry out SCNR
It answers, and denitration efficiency is high in this temperature range.
In further embodiments, the bypass of reducing agent output pipe is equipped with plasma reactor 230, denitration reduction
Agent can be sent by two circuits to gas turbine turbine 130.A part is directly sent by reducing agent output pipe to combustion gas wheel
In machine turbine 130, some is sent after being handled by plasma reactor 230 to gas turbine turbine 130, by it is equal from
The denitrification reducing agent of the processing of daughter reactor 230 accounts for the 0~100% of denitrification reducing agent gross mass.
Denitrification reducing agent after plasma treatment can generate more reduction free radicals, these reduction free radicals can be with
Accelerate the progress of denitration reaction, and then improves denitration efficiency.
Further, in some preferred embodiments, in reducing agent feeding mechanism 200, it is equipped with flow divider 260, is used for
Adjust the reducing agent quality that the gaseous state denitrification reducing agent that evaporator 220 exports branches in reducing agent output pipe and its bypass
Than.
Before denitrification reducing agent enters gas turbine turbine 130,280, check valve are equipped with, for controlling reducing agent output
It is delivered to the level-one movable vane piece rear portion of gas turbine turbine 130 after gaseous state denitrification reducing agent afflux in pipeline and its bypass, protects
Demonstrate,prove safety.
Preferably, combiner valve can be set in the gaseous state denitrification reducing agent meet in reducing agent output pipe and its bypass
270, after denitrification reducing agent is delivered to the level-one movable vane piece of gas turbine turbine 130 by check valve 280 after combiner valve 270
Portion.The double shield of combiner valve 270 and check valve 280, makes safety be guaranteed.
The present invention also provides the method for denitration in a kind of gas turbine turbine 130, Fig. 3 is that the process of method of denitration is illustrated
Figure is analyzed in conjunction with Fig. 2, using being connected to the reducing agent output pipe at 130 level-one movable vane piece rear portion of gas turbine turbine to turbine
Liquid denitrification reducing agent is provided in 130；The nitrogen oxides and denitrification reducing agent that gas-turbine combustion chamber 120 is discharged in flue gas are firing
Contact carries out selective non-catalytic reduction reaction in gas-turbine turbine 130, completes the denitration to flue gas.
Further, part gaseous reducing agent is after corona treatment, with flue gas in gas turbine turbine 130 into
Row reaction denitration.
Shown in specific steps Fig. 3:
Step S302: liquid reducing agent becomes gaseous reducing agent after evaporator 220；
Step S304: flue gas in gas turbine turbine 130 with reducing agent reaction denitration；
Step S306: other reducing agents of part are plasma treated, continue to execute step S302.
Before executing step S302, the reducing agent in reducing agent storage tank 210 is under the action of delivery pump 250 along delivery pipe
Line enters in evaporator 220, the gaseous reducing agent that the reducing agent of liquid generates in evaporator 220.
Before executing step S304, air enters in gas turbine blower 110, presses under the action of compressor 110
Power rises, temperature increases, and mixes into combustion chamber 120 with fuel, and mixture burns in combustion chamber 120, and it is high to generate high temperature
The flue gas of pressure, flue gas enter therewith in combustion engine turbine 130.
Finally, gaseous reducing agent is delivered in turbine 130 by reducing agent output pipe, connect in turbine 130 with flue gas
Touching carries out selective non-catalytic reduction reaction, completes the denitration to flue gas.
Wherein, selective non-catalytic reduction (SNCR), being is a kind of reduction NO at this stagexDischarge technology, exist
Combustion gas, oil fired power plant are used widely, by by reducing agent under specific temperature, aerobic environment with NOxIt is anti-to carry out selectivity
It answers, is reduced to harmless N2。
In the present invention, the urea liquid that the reducing agent used is concentrated ammonia liquor or mass fraction is 45~60%.
For using concentrated ammonia liquor as reducing agent, SNCR reaction reduces NOxThe overall reaction of discharge can be written as:
4NO+4NH3+O2=4N2+6H2O (1)
Its principle is the NH that reducing agent generates2Free radical restores NO, key reaction are as follows:
NO+NH2·→N2+H2O (2)
NO+NH2·→NNH·+OH· (3)
The spontaneous progress of above-mentioned reaction energy is reacted due to following chain components:
NNH·+NO→N2+HNO· (4)
HNO·+M→H·+NO+M (5)
Wherein, M represents any inert molecule in system.
NH2The generating mode of free radical can be indicated by following reaction:
NH3+OH·→NH2·+H2O (6)
NH3+O·→NH2·+OH· (7)
The O in (6) and (7) is reacted, OH free radical is generated by following reaction:
H·+O2→OH·+O· (8)
O·+H2O→OH·+OH· (9)
NO is reduced in SNCR methodxDischarge, it is desirable that reaction temperature is in suitable section: when temperature is very low, O, OH
The reaction rate of the generation reaction (8) and (9) of free radical is very low, leads to NH2Free radical generates reaction (6) and (7) and is difficult to carry out,
Reductive free radical content is low, it is difficult to reduce NOxContent；When temperature is higher, part NHi(i value 1 or 2) free radical can aoxidize
NO is generated, this can reduce the emission reduction effect of SNCR；When temperature further increases, more NHiFree radical, which can aoxidize, generates NO,
It is unable to reach emission reduction purpose.With reducing agent NH3For, the reaction interval of SNCR is about 800 to 1200 DEG C, this temperature range with
The temperature at 130 level-one movable vane rear portion of gas turbine turbine is consistent, in addition, the rotation of turbine 130 in combustion engine turbine 130 facilitates also
Former agent mixes with flue gas, while high pressure also contributes to promoting denitration reaction.
It further, can also be in 130 other positions of turbine if temperature range meets the temperature of the reaction interval of SNCR
Carry out SNCR reaction.
Method of denitration provided by the invention in gas turbine turbine 130, NO in flue gasxDirectly exist with denitrification reducing agent
Selective non-catalytic reduction reaction is carried out in turbine 130, is completed the denitration to flue gas and is not only reduced compared with prior art
Equipment needed for reacting, and simplify reaction process, make reaction process operation easier to control.
Particularly, denitrification reducing agent enters plasma reactor 230 along bypass segment, and generates reproducibility wherein certainly
By base, remaining reducing agent is then handled without plasma reactor, directly by bypassing into combustion engine turbine 130.Into etc. from
The reducing agent ratio of daughter processor can be adjusted by flow divider 260, and the ratio for accounting for reducing agent quality total amount is 0 to 100%.Also
Former agent enters the level-one movable vane rear portion of combustion engine turbine 130 by check valve 280.In turbine 130, in reducing agent and flue gas
NOxOccur selective non-catalytic reduction (SNCR), generates harmless product (such as N2And H2O), achieve the purpose that denitration.
NH can be promoted by handling reducing agent with plasma reactor 2302The generation of free radical, thus intensified response (2)
(3), and then play the role of accelerating denitration.Equally with NH3For reducing agent, reaction is expressed as follows:
e-+N2→e-+N2* (10)
NH3+e-→NH2·+H·+e- (11)
NH3+N2*→NH2·+H·+N2 (12)
Wherein N2* the nitrogen molecule for being in excitation state is represented.
Further, the N in plasma reactor 2302From air, the common carrier of reducing agent is air.
Method of denitration of the invention, before denitrification reducing agent carries out selective non-catalytic reduction reaction, by plasma
The pretreatment of reactor according 230, generates free radicals, and promotes denitration reaction, improves denitration efficiency.When reducing agent does not pass through plasma
When the processing of reactor according 230, denitration efficiency is 30~50%；When reducing agent by plasma reactor 230 processing after,
Denitration efficiency reaches 80%.
Particularly, all there is NH_3 leakage in existing SCR, SNCR technology, by controlling the input quantity of reducing agent, make
The ammonia that exit is not reacted completely meets discharge standard.Compared to the flue gas flow that combustion chamber 120 exports, reducing agent input flow rate is small
In flue gas flow, makes ammonia reaction sufficiently, reach discharge standard.
So far, although those skilled in the art will appreciate that present invention has been shown and described in detail herein multiple shows
Example property embodiment still without departing from the spirit and scope of the present invention, still can according to the present disclosure directly
Determine or deduce out many other variations or modifications consistent with the principles of the invention.Therefore, the scope of the present invention is understood that and recognizes
It is set to and covers all such other variations or modifications.
Claims (6)
1. a kind of denitrating system of gas turbine, comprising:
Gas turbine comprising compressor, combustion chamber and gas turbine turbine, the gas turbine turbine are used for the combustion
It burns the energy that indoor fuel combustion generates and is converted into mechanical energy；
Reducing agent feeding mechanism is used to provide the denitrification reducing agent of the nitrogen oxides in reduction burning discharge flue gas, and
The reducing agent output pipe of the reducing agent feeding mechanism is connected to the turbine level-one movable vane piece rear portion of the gas turbine,
So that nitrogen oxides is reduced in the gas turbine turbine；
The reducing agent feeding mechanism includes:
Reducing agent storage tank, for storing denitrification reducing agent；
Evaporator is connect with the reducing agent storage tank, for the denitrification reducing agent of liquid to be evaporated to gaseous state denitrification reducing agent；Institute
State the turbine level-one movable vane piece rear portion that gaseous state denitrification reducing agent is delivered to the gas turbine by reducing agent output pipe；
Plasma reactor is the combustion gas in the bypass of the reducing agent output pipe of the reducing agent feeding mechanism
Turbine turbine provides the denitrification reducing agent after corona treatment；
Flow divider, the gaseous state denitrification reducing agent for adjusting the evaporator output branch to the reducing agent output pipe and its
Mass ratio in bypass.
2. denitrating system according to claim 1, wherein
The reducing agent feeding mechanism further include:
Check valve conveys the gaseous state denitrification reducing agent to the gas turbine turbine for controlling the reducing agent output pipe
Level-one movable vane piece rear portion.
3. denitrating system according to claim 1, wherein
The reducing agent feeding mechanism further include:
Plasma reactor power supply electrically connects as it with the plasma reactor and provides electric energy.
4. a kind of method of denitration of gas turbine, including,
It is mentioned using the reducing agent output pipe at the turbine level-one movable vane piece rear portion for being connected to the gas turbine into the turbine
For denitrification reducing agent；
Nitrogen oxides and the denitrification reducing agent in the combustion chamber discharge flue gas of the gas turbine is saturating in the gas turbine
Contact carries out selective non-catalytic reduction reaction in flat, completes the denitration to the flue gas；
Before the denitrification reducing agent and the nitrogen oxides haptoreaction, handles, generates free radicals through plasma reactor,
Promote denitration reaction.
5. method of denitration according to claim 4, wherein
By mass percentage, the denitrification reducing agent handled through plasma reactor accounts for the denitrification reducing agent total amount
0~100%.
6. method of denitration according to claim 4, wherein
The urea liquid that the denitrification reducing agent is concentrated ammonia liquor or mass fraction is 45~60%.
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| CN201711038818.2A CN107789984B (en) | 2017-10-30 | 2017-10-30 | A kind of denitrating system and method for gas turbine |
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| JP6819323B2 (en) * | 2017-01-31 | 2021-01-27 | 株式会社Ihi | Thermal cycle equipment |
| CN110878715A (en) * | 2018-12-20 | 2020-03-13 | 国网上海市电力公司 | Reducing NO during low power operation of gas turbinexMethod of discharging |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5132103A (en) * | 1989-02-10 | 1992-07-21 | Haldor Topsoe A/S | Process for the removal of nitrogen oxides from offgases from turbines |
| FR2942502A1 (en) * | 2009-02-24 | 2010-08-27 | Peugeot Citroen Automobiles Sa | Nitrogen oxide controlling method for oil engine of motor vehicle, involves operating engine according to calibration so as to provoke reduction of nitrogen oxide production source, when engine is placed in specific environment |
| CN102272428A (en) * | 2009-01-14 | 2011-12-07 | 丰田自动车株式会社 | Engine |
| CN102688672A (en) * | 2012-06-08 | 2012-09-26 | 深圳市泓耀环境科技发展股份有限公司 | Denitration method for waste gas generated by burning system and denitration device thereof |
| CN105545434A (en) * | 2014-10-28 | 2016-05-04 | 通用电气公司 | System and method for emissions control in gas turbine systems |
| CN206215015U (en) * | 2016-11-23 | 2017-06-06 | 碧水蓝天环保集团有限公司 | Sncr denitration system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100907819B1 (en) * | 2007-10-08 | 2009-07-16 | 재단법인 포항산업과학연구원 | Selective non-catalytic reduction and removal of nitrogen oxides in exhaust gas |
| JP2015190466A (en) * | 2014-03-31 | 2015-11-02 | 株式会社Ihi | Combustion device, gas turbine and power generation device |
| KR20160009367A (en) * | 2014-07-16 | 2016-01-26 | 현대중공업 주식회사 | Selective Non-Catalytic Reduction System |
| KR102024397B1 (en) * | 2014-07-16 | 2019-09-23 | 한국조선해양 주식회사 | Selective Non-Catalytic Reduction System |
| JP6482020B2 (en) * | 2015-03-26 | 2019-03-13 | 一般財団法人電力中央研究所 | Coal gasification combined power generation facility |
-
2017
- 2017-10-30 CN CN201711038818.2A patent/CN107789984B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5132103A (en) * | 1989-02-10 | 1992-07-21 | Haldor Topsoe A/S | Process for the removal of nitrogen oxides from offgases from turbines |
| CN102272428A (en) * | 2009-01-14 | 2011-12-07 | 丰田自动车株式会社 | Engine |
| FR2942502A1 (en) * | 2009-02-24 | 2010-08-27 | Peugeot Citroen Automobiles Sa | Nitrogen oxide controlling method for oil engine of motor vehicle, involves operating engine according to calibration so as to provoke reduction of nitrogen oxide production source, when engine is placed in specific environment |
| CN102688672A (en) * | 2012-06-08 | 2012-09-26 | 深圳市泓耀环境科技发展股份有限公司 | Denitration method for waste gas generated by burning system and denitration device thereof |
| CN105545434A (en) * | 2014-10-28 | 2016-05-04 | 通用电气公司 | System and method for emissions control in gas turbine systems |
| CN206215015U (en) * | 2016-11-23 | 2017-06-06 | 碧水蓝天环保集团有限公司 | Sncr denitration system |
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