CN209596902U - A kind of spray ammonia conglomerate integration AIG for Gas Generator Set waste heat boiler - Google Patents
A kind of spray ammonia conglomerate integration AIG for Gas Generator Set waste heat boiler Download PDFInfo
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- CN209596902U CN209596902U CN201821496302.2U CN201821496302U CN209596902U CN 209596902 U CN209596902 U CN 209596902U CN 201821496302 U CN201821496302 U CN 201821496302U CN 209596902 U CN209596902 U CN 209596902U
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Abstract
The utility model provides a kind of spray ammonia conglomerate integration AIG for Gas Generator Set waste heat boiler, including air inlet pipe, header, nipple, spray ammonia conglomerate integration device；Air inlet pipe is connected with header, the non-side for being set to header at equal intervals of nipple, is provided with spray ammonia conglomerate integration device on nipple；Spraying ammonia conglomerate integration device includes air jet pipe, disturbing flow device and nozzle, and air jet pipe is arranged in parallel on nipple, and disturbing flow device and the non-spaced set of nozzle are on air jet pipe.The spray ammonia conglomerate integration AIG of the utility model can be remarkably reinforced ammonia and mix with flue gas degree, and catalyst inlet NH is substantially improved3/NOxMolar ratio distributing homogeneity improves catalyst inlet velocity of flue gas distributing homogeneity；The technical issues of significant shortening ammonia and flue gas are sufficiently mixed required height, solve the universal less than normal, ammonia of the reserved denitrating system position height of existing Gas Generator Set waste heat boiler and flue gas undercompounding, denitration efficiency decline, the escaping of ammonia is caused to increase.
Description
Technical field
The utility model relates to a kind of environmental technology field more particularly to a kind of spray ammonia for Gas Generator Set waste heat boiler
Conglomerate integration AIG.
Background technique
The rapid expansion of pneumoelectric installed capacity in recent years, plant gas is predominantly located at economically developed, environmental sensitive area in addition
Domain, environmental issue are increasingly prominent.The atmosphere pollution of Gas Turbine Generating Units discharge is mainly NOx.For this purpose, emphasis
Area further reduced Gas Turbine Generating Units NOxEmission limit, local electricity power enterprise even require subordinate's gas electricity generator
Group NOxConcentration of emission should be lower than 5mg/m3.To realize the target, except in addition to combustion engine is equipped with dry type low NO, still needing to continue to adopt
Remainder heat boiler SCR (Selective Catalytic Reduction, abbreviation SCR) denitration technology.SCR denitration technology refers to
Within the scope of 280~420 DEG C, reducing agent (such as liquefied ammonia, urea and ammonium hydroxide) under the action of catalyst, " selective " and cigarette
NO in gasxReaction, generates free of contamination N2And H2The NO of OxEmission-reduction technology.SCR denitration technology is mature to be applied to coal burning machine
Group, plant gas lack associated specifications and experience accumulation, there is also problems in design and operation using less.
For example, the denitrating system position height that Gas Generator Set waste heat boiler is reserved is universal (about 3~5m) less than normal, SCR equipment for denitrifying flue gas
Ammonia spray grid (abbreviation AIG, Ammonia Injection Grid), AIG system is closer apart from catalyst layer, nozzle spray
Ammonia and flue gas do not obtain being sufficiently mixed just enter catalyst carry out denitration reaction, cause denitration efficiency decline, the escaping of ammonia increase
Add.Further, since mixing is apart from short, flue inner supporting structure such as I-beam and AIG main pipeline can all be mixed flue gas and ammonia
It closes and catalyst inlet velocity of flue gas distributing homogeneity generates adverse effect.
In Gas Generator Set NOxNear-zero release (< 5mg/m3) under situation, SCR denitrating flue gas efficiency need to be increased to about 90%, right
The NH of catalyst inlet3/NOxMolar ratio distributing homogeneity proposes very high requirement.NH3/NOxMolar ratio distributing homogeneity with
Gaseous state NH at ammonia-spraying grid3, velocity of flue gas and NOxConcentration distribution is related, except carrying out multi-direction point of ammonia-spraying grid system ontology
Area's adjusting and enough nozzles uniformly spray outer, it is also necessary to improve ammonia-spraying grid gas ammonia injection hybrid technology.Coal burning machine at present
Group SCR denitration device have following characteristics: 1, ammonia-spraying grid system apart from catalyst layer farther out, typically up to 10-15m, thus spray
Ammonia and flue gas have sufficient incorporation time in flue；2, ammonia-spraying grid usually layered arrangement in the height direction, in width
Degree is evenly arranged on direction, and the static mixer of setting also usually is disposed on ammonia-spraying grid downstream；3, due to ammonia and flue gas
Distance is mixed, the lesser support construction of flue inside dimension and AIG main pipeline etc. will not mixing and catalysis to flue gas and ammonia
Agent inlet flue gas velocity distribution uniformity has much impact.And the denitrating system position height that Gas Generator Set waste heat boiler is reserved
Universal less than normal, ammonia-spraying grid system is closer apart from catalyst layer, about 3-5m, mixing of the ammonia and flue gas of ejection in flue
Apart from short, it be easy to cause ammonia and flue gas undercompounding；And flue inner supporting structure (such as I-beam) and AIG main pipeline are equal
Can have an adverse effect to the mixing of flue gas and ammonia and catalyst inlet velocity of flue gas distributing homogeneity.Due to coal unit with
Gas Generator Set is widely different in structure, and the SCR spray ammonia hybrid technology of coal unit can not be suitable for combustion gas in the prior art
Unit, therefore research and development are needed for the spray ammonia conglomerate integration AIG of the SCR denitration device of Gas Generator Set waste heat boiler.
Utility model content:
The utility model aim is solved there is provided a kind of spray ammonia conglomerate integration AIG of Gas Generator Set waste heat boiler
The ammonia that the universal less than normal, nozzle of the reserved denitrating system position height of existing Gas Generator Set waste heat boiler sprays mixes not with flue gas
Sufficiently, the problem of leading to denitration efficiency decline, the escaping of ammonia increase；Catalyst can be effectively promoted after the AIG system of this programme is installed
Entrance ammonia nitrogen molar ratio distributing homogeneity, and catalyst inlet velocity of flue gas distributing homogeneity is greatly improved, to improve denitration
Efficiency.
In order to achieve the above object, the utility model adopts the following technical solution:
A kind of spray ammonia conglomerate integration AIG for Gas Generator Set waste heat boiler, it is characterised in that: including air inlet pipe, connection
Case, nipple, spray ammonia conglomerate integration device；The air inlet pipe is connected with the header, connecting portion be among header it is excellent,
The nipple is non-to be set to the header side at equal intervals, and the spray ammonia conglomerate integration dress is provided on the nipple
It sets；The spray ammonia conglomerate integration device includes air jet pipe, disturbing flow device and nozzle, and the air jet pipe is arranged in parallel in described short
On adapter tube, the disturbing flow device and the non-spaced set of the nozzle are on the air jet pipe.By by ammonia-spraying grid and mixing
Device integrates, and disturbing flow device and nozzle are arranged on air jet pipe and are arranged in sustained height and nipple and jet
The non-spaced set of pipe, air jet pipe top nozzle, substantially reduces spray ammonia and ammonia and flue gas is sufficiently mixed required height, has
The ammonia and flue gas that solve the universal less than normal, nozzle of the reserved denitrating system position height of Gas Generator Set waste heat boiler and spray of effect
The problem of undercompounding.Air jet pipe is set on nipple, the non-spaced set of nipple is on header, being because by work
The barrier effect of word beam, flue gas have the case where flue gas flow rate is unevenly distributed when passing through flue, i.e., flow velocity is low near I-beam
(then ammonia spraying amount needed for the region is just few) is increased I-beam nozzle (or air jet pipe) spacing nearby, is made using non-spaced set
The region ammonia spraying amount is opposite to be reduced.Similarly, header size is larger, and by its inhibition, nearby flue gas flow rate is low in header downstream, spray
Tracheae top nozzle uses non-spaced set, increases spacing between the adjacent nozzle of header two sides, also makes header downstream area nearby
Ammonia spraying amount opposite reduce in domain can effectively promote the ammonia nitrogen molar ratio distributing homogeneity for reaching catalyst upstream flue gas；Using flow-disturbing
Device upsets the effect of smoke distribution, and the ammonia that nozzle sprays can obtain more sufficiently, uniformly mixing in short distance with flue gas.
Preferably, header both ends are fixed in Gas Generator Set waste heat boiler flue by I-beam, header and coupled
Air inlet pipe, nipple, spray ammonia conglomerate integration device constitute an injection unit, multiple injection units are arranged in matrix form
On flue cross section.Every air inlet pipe is an injection unit for ammonia, to realize that each injection unit can individually control spray
Ammonia amount is more advantageous to the adjusting for ammonia amount.
Preferably, disturbing flow device is fixed on air jet pipe, is distributed in nozzle two sides, the spoiler size of single-nozzle two sides
It is identical with shape, it is arranged symmetrically.Disturbing flow device is fixed on air jet pipe and is distributed in nozzle two sides so that spray ammonia and mixed process
It effectively is integrated to same level, the disturbance of flue gas near nozzle can be significantly increased, reinforces ammonia and mixes with flue gas, contract significantly
Distance required for short spray ammonia and ammonia mix sufficiently with flue gas；The spoiler size and shape of single-nozzle two sides is identical, right
Claim arrangement, is conducive to raising ammonia and mixes with flue gas uniformity.
Preferably, nozzle opening direction is identical as the flue gas flow direction in Gas Generator Set flue.It is arranged such, it is ensured that sprayed
Ammonia direction out is identical as flue gas flow direction, guarantees that the two mixing is more abundant, avoids flue gas pressures plug nozzle.
Preferably, the air jet pipe is non-on the header is equally spaced, the adjacent air jet pipe of the I-beam two sides
Between spacing be in other positions 1.3-1.7 times of spacing between adjacent air jet pipe.It is influenced by I-beam, the work of header two sides
Nearby flue gas flow rate is low for word beam, and it is after fully taking into account smoke distribution feature, to flue gas stream that air jet pipe, which uses non-spaced set,
The specific aim setting that the inhomogeneities of speed distribution is taken, can effectively promote catalyst inlet ammonia nitrogen molar ratio distributing homogeneity, subtract
Few the escaping of ammonia.It finds, is influenced by the fixed device I-beam in header both ends, flue gas flow rate distribution by CFD numerical experiments
In non-uniform Distribution, the flue gas flow rate near I-beam is lower.When the ratio of two groups of injector spacings is in 1.3-1.7 times of ratio
It when range, peomotes flue gas and is mixed with the full and uniform of ammonia, improve denitration performance.
Preferably, the nozzle quantity on the air jet pipe of the I-beam two sides is lower than the nozzle on the air jet pipe of other positions
Quantity.Since flue gas flow rate is low near I-beam downstream area, needs ammonia spraying amount relatively fewer, by the spray of I-beam two sides
The nozzle quantity that nozzle quantity on tracheae is designed at than other positions is few；And the flue gas flow rate of other positions is high, it is corresponding
Nozzle quantity is more, and the ammonia of effective guarantee ejection and being sufficiently mixed for flue gas, are the inhomogeneities for flue gas flow rate distribution
Targetedly design.
Preferably, the nozzle is non-on the air jet pipe is equally spaced, between the adjacent nozzle of the header two sides
Spacing is in other positions 1.2-1.3 times of spacing between adjacent nozzle.It is influenced by header, flue gas flow rate near header downstream
Low, nozzle uses non-spaced set, is to adopt after fully taking into account smoke distribution feature to the inhomogeneities of flue gas flow rate distribution
The specific aim setting taken.It is found by CFD numerical experiments, when the ratio of two groups of injector spacings is in 1.2-1.3 times of ratio
It when example range, peomotes flue gas and is mixed with the full and uniform of ammonia, improve denitration performance.
Preferably, the cross sectional shape of disturbing flow device is semicircle.A large amount of tests have been done for different shape disturbing flow device, have been sent out
Existing flue gas is after cross sectional shape is semicircular disturbing flow device, distributing homogeneity and more fully mixed more evenly with ammonia.
Preferably, disturbing flow device is alternately arranged setting according to specified angle on the air jet pipe of adjacent nozzle two sides, can fill
Divide and upset smoke distribution, improves ammonia and mix with flue gas uniformity and efficiency.
Preferably, the specified angle is that the disturbing flow device of the adjacent nozzle two sides is in respectively with flue gas flow direction in flue
50~65 ° and -50~65 ° are alternately arranged.Found by many experimental results early period, when disturbing flow device and flue gas flow direction in 50~
When 65 ° and -50~65 ° are alternately arranged, flue gas resistance can be reduced while effectively improving ammonia and mixing with flue gas efficiency,
Reach more energy efficient efficient effect.
It preferably, further include the external regulating valve being connected with the air inlet pipe, each external regulating valve controls one
The ammonia spraying amount of the nozzle of the injection unit.By the way that control valve is arranged, ammonia spraying amount can be adjusted in real time according to flue gas flow, guaranteed
It proportional region between ammonia and flue gas and is sufficiently mixed, and improves catalyst inlet velocity of flue gas distributing homogeneity, Jin Erti
High denitration efficiency；Increase the controllability and practicability of this AIG system.
The technical solution of the utility model has following advantageous effects:
1, this programme by by ammonia-spraying grid and mixing arrangement integrated and be arranged in sustained height and nipple and
The non-spaced set of air jet pipe, air jet pipe top nozzle, significantly shortens spray ammonia and ammonia and flue gas is sufficiently mixed required height
Degree effectively overcomes the universal problem less than normal of the reserved denitrating system position height of Gas Generator Set waste heat boiler；
2, nozzle is equally spaced, disturbing flow device is according to specified angle by this programme according to smoke distribution feature according to non-
It is alternately arranged and is set to nozzle two sides, by the effect of disturbing flow device, the ammonia and flue gas that nozzle sprays obtain in short distance
More sufficiently, uniform to mix, the NH at SCR denitration system catalyst inlet3/NOxMolar ratio distributing homogeneity significantly improves, and mentions
High denitration efficiency, reduces the escaping of ammonia；
3, the effectively save energy of spray ammonia conglomerate integration AIG and cost of this programme, and this programme AIG system can carry out
It adjusts, is practical, the low nitrogen retrofit work of depth for carrying out Gas Generator Set for China has preferable practical value.
Detailed description of the invention
From following description with reference to the accompanying drawings it will be further appreciated that the utility model.Component in figure is drawn not necessarily to scale
System, but focus on and show in the principle of embodiment.In the figure in different views, identical appended drawing reference is specified
Corresponding part.
Fig. 1 is the structural schematic diagram of the utility model spray ammonia conglomerate integration AIG；
Fig. 2 is the main view that ammonia conglomerate integration AIG is sprayed in Fig. 1；
Fig. 3 is the top view that ammonia conglomerate integration AIG is sprayed in Fig. 1；
The label in accompanying drawing is: 1- air inlet pipe, 2- header, 3- nipple, 4- spray ammonia conglomerate integration device, 5- jet
Pipe, 51- I-beam two sides air jet pipe, 52- inoperative beam two sides air jet pipe, 6- nozzle, 7- spoiler, 8- I-beam.
Specific embodiment
The selected embodiment of the utility model is illustrated referring now to specification and its attached drawing, those skilled in the art are according to this
Subordinate's explanation of disclosed the embodiments of the present invention is merely exemplary, and is not intended to the side of limitation the utility model
Case.
Embodiment
Referring to illustrate it is shown in FIG. 1 for Gas Generator Set waste heat boiler spray ammonia conglomerate integration AIG structural schematic diagram,
Including air inlet pipe 1, header 2, nipple 3, spray ammonia conglomerate integration device 4.Air inlet pipe 1 is set to 2 side of header；Nipple 3
Non- to be set to the other side opposite with air inlet pipe 1 on header 2 at equal intervals, nipple 3 is connected to header 2；On each nipple 3
It is provided with spray ammonia conglomerate integration device 4；Header 2 and coupled air inlet pipe 1, nipple 3, spray ammonia conglomerate integration dress
4 composition, one injection unit is set, multiple injection units are arranged on flue cross section in matrix form and (illustrate only one in Fig. 1
Injection unit).2 both ends of header are fixed in Gas Generator Set waste heat boiler flue by I-beam 8, ammonia by air inlet pipe 1 into
Enter the nipple 3 of injection unit, then is ejected into waste heat boiler flue by spraying ammonia conglomerate integration device 4.
Referring to shown in schematic diagram 2, spray ammonia conglomerate integration device 4 includes air jet pipe 5, disturbing flow device 7 and nozzle 6, jet
Pipe 5 is arranged in parallel on nipple 3, and disturbing flow device 7 and the non-spaced set of nozzle 6 are on air jet pipe 5.Disturbing flow device 7 is cut
Face shape be it is semicircle, the disturbing flow device 7 of 6 two sides of single-nozzle is symmetrical set on air jet pipe 5, and according to flue gas flow direction
It carries out being alternately arranged arrangement in the angle that angle is 60 ° and -60 °.Air jet pipe is arranged in parallel on nipple, disturbing flow device and
The non-spaced set of nozzle, so that ammonia-spraying grid and mixing arrangement integrate, is arranged in sustained height on air jet pipe；It disturbs
It flows device and disturbs flue gas, the ammonia for spraying nozzle obtains more sufficiently, uniformly mixing in short distance with flue gas, greatly improves
Denitration efficiency, reduces the escaping of ammonia.In other embodiments, it is according to flue gas flow direction on the air jet pipe 5 of 6 two sides of nozzle
50 ° and -50 ° are alternately arranged setting or 65 ° and 65 ° are alternately arranged setting.By pre-stage test count find, when disturbing flow device with
When flue gas flow direction is alternately arranged in 50~65 ° and -50~65 °, can while effectively improving ammonia and mixing with flue gas efficiency,
Flue gas resistance is reduced, more energy efficient efficient effect is reached.
Referring to exemplary diagram 3, air jet pipe 5 be on header 2 it is non-be equally spaced, spacing between I-beam two sides air jet pipe 51
For 346mm, spacing is 250mm between non-I-beam two sides air jet pipe 52；Single 51 top nozzle 6 of I-beam two sides air jet pipe number
Amount is 12, and single 6 quantity of I-beam two sides 52 top nozzle of air jet pipe is 14.It is sent out by CFD numerical experiments early period
It is existing, it is lower in the downstream area flue gas flow rate of I-beam, it is not higher by the flue gas flow rate of I-beam occlusion area, therefore I-beam
The jet tube spacing of two sides need to be greater than non-I-beam two sides jet tube spacing, and the air jet pipe top nozzle quantity of I-beam two sides needs
Lower than non-I-beam two sides air jet pipe top nozzle quantity.It is found by CFD numerical experiments, the adjacent jet of I-beam two sides
Spacing is 1.3-1.7 times of spacing between the air jet pipe of non-I-beam two sides between pipe, is conducive to the full and uniform of flue gas and ammonia
Mixing reduces the escaping of ammonia to improve denitration efficiency.
Referring to schematic diagram 3, nozzle 6 is planar equally spaced to be non-, 2 two sides of I-beam two sides 51 upper header of air jet pipe
Adjacent nozzle 6 apart from for 370mm, spacing is 283mm between the adjacent nozzle 6 of remaining position；Non- I-beam two sides air jet pipe
The adjacent nozzle 6 of 52 upper header, 2 two sides is apart from for 306mm, and spacing is 245mm, nozzle bore between the adjacent nozzle 6 of remaining position
Diameter is 4mm.The cross sectional shape of disturbing flow device 7 is semicircle, and two pieces of semicircles are symmetrical arranged on the air jet pipe 5 of 6 two sides of nozzle.
It is found by CFD numerical experiments early period, it is lower in header downstream area flue gas flow rate, not by the flue gas of header occlusion area
Flow velocity is higher, therefore spacing need to be greater than non-header two sides injector spacing between two side nozzle of header namely nozzle is adopted on air jet pipe
It is equally spaced with non-.It is found by CFD numerical experiments, spacing is in other positions between the adjacent nozzle of header two sides
When 1.2-1.3 times of spacing between adjacent nozzle, be conducive to the full and uniform mixing of flue gas and ammonia, to improve denitration effect
Rate reduces the escaping of ammonia.In the present embodiment, the length of nipple 3 is 100mm, and the cross sectional shape of disturbing flow device 7 is that radius is
The semicircle of 150mm.The discovery of CFD numerical experiments, the section radius of disturbing flow device are set as 150mm, and flue gas and ammonia are mixed
The adequacy and flue gas resistance of conjunction are in optimal equalization point, so as to reach more energy efficient efficient effect.In other embodiments
In, the form and dimension of disturbing flow device can be specifically designed according to AIG system components size and flue gas flow rate.
In the present embodiment, spacing is 346mm between I-beam two sides air jet pipe 51, between non-I-beam two sides air jet pipe 52
Spacing is 250mm.The adjacent nozzle 6 of 2 two sides of I-beam two sides 51 upper header of air jet pipe is apart from for 370mm, the phase of remaining position
Spacing is 283mm between adjacent nozzle 6；The adjacent nozzle 6 of 2 two sides of non-I-beam two sides 52 upper header of air jet pipe apart from for 306mm,
Spacing between the adjacent nozzle 6 of remaining position is 245mm.Ammonia flow direction and the flue gas flow direction phase in flue that nozzle 6 sprays
Together, the aperture of nozzle 6 is set as 4mm.It calculates it is found that being spaced about non-two side spray of I-beam between I-beam two sides air jet pipe 51
1.4 times of spacing between tracheae 52, spacing is other between the adjacent nozzle 6 of 2 two sides of I-beam two sides 51 upper header of air jet pipe
1.3 times of 6 spacing of position nozzle, spacing is other between the adjacent nozzle 6 of 2 two sides of non-I-beam two sides 52 upper header of air jet pipe
1.2 times of 6 spacing of position nozzle.In other embodiments, the spacing on header between air jet pipe and air jet pipe top nozzle it
Between spacing can be set to other numerical value, the section radius of disturbing flow device also needs to be made the appropriate adjustments according to the distance between nozzle.
Spray ammonia conglomerate integration AIG in the present embodiment is additionally provided with external regulating valve (not illustrating in figure), external regulating valve
Control the ammonia amount of air inlet pipe and nozzle.The nozzle 6 of each injection unit by an air inlet pipe 1 for ammonia, and by external regulating valve
Control, each regulating valve control the ammonia spraying amount of an injection unit nozzle 6.In this way, can be adjusted in real time according to flue gas flow
Ammonia spraying amount is saved, guarantee the proportional region in ammonia and flue between flue gas and is sufficiently mixed, catalyst inlet velocity of flue gas is improved
Distributing homogeneity, and then improve denitration efficiency；Increase the modulability and practicability of this AIG system.
The working principle of ammonia conglomerate integration AIG is sprayed in the present embodiment and the course of work is described below:
1, the spray ammonia conglomerate integration AIG for being used for Gas Generator Set waste heat boiler is arranged in waste heat boiler flue, makes to spray
Mouth is equally spaced on flue cross section in matrix form is non-, and the position of each nozzle two sides is respectively provided with spoiler；
2, start Gas Generator Set and AIG system, flue gas in flue by I-beam and AIG main pipeline influenced flow velocity occur it is non-
Even property distribution, ammonia are sprayed from the nozzle of spray ammonia conglomerate integration AIG, and disturbing flow device sufficiently upsets smoke distribution, improves ammonia
Mix with flue gas uniformity；
3, according to the change in flow of flue gas in flue, the spray ammonia that external regulating valve controls corresponding injection unit nozzle is adjusted
Amount, real-time control adjusts ammonia spraying amount, and then controls the performance indexes of the flue gas flow field of SCR denitration upstream, finally
Reach optimal denitration effect.
The following are the SCR spray ammonia in the 2 comparison AIG systems and the utility model that use certain Gas Generator Set power plant respectively is mixed
It closes integration AIG system and carries out SCR denitrating flue gas numerical experiments, count the flue gas stream of SCR denitration system catalyst upstream
The performance indexes of field, statistical result are as shown in table 1.
The flue gas flow field performance indicator statistical data of 1 difference AIG system of table
Wherein, comparative example 1 is that comparative example 1 is not using in spray ammonia conglomerate integration device with embodiment comparison difference
Disturbing flow device, nipple, air jet pipe and nozzle use spaced set；Comparative example 2 is distinguished with embodiment comparison to be, comparative example
2 using the disturbing flow device in spray ammonia conglomerate integration device.
As it can be seen from table 1 multiple nipples, air jet pipe and nozzle use spaced set, NH in comparative example 13/NOx
Molar ratio distribution relative standard deviation is significantly greater than comparative example 2 and embodiment.In comparative example 2 to multiple nipples, air jet pipe and
Nozzle uses non-spaced set, but is not provided with disturbing flow device, VELOCITY DISTRIBUTION relative standard deviation and NH3/NOxIt rubs
You are all larger than the data of embodiment than distribution relative standard deviation.
The above correlation data shows, the smoke distribution using the AIG system of the present embodiment, in the flue of entire catalyst upstream
More uniformly, ammonia and flue gas are more fully mixed.Illustrate to use non-spaced set to multiple nipples, air jet pipe and nozzle,
And disturbing flow device is installed, can greatly shorten spray ammonia and ammonia mix with flue gas it is abundant it is required apart from while, substantially mention
Rise catalyst inlet NH3/NOxMolar ratio distributing homogeneity and velocity of flue gas distributing homogeneity；To solve Gas Generator Set waste heat pot
The universal problem less than normal of the reserved denitrating system position height of furnace, substantially increases the denitration efficiency of Gas Generator Set, reduces ammonia
Escape.
Finally it should be noted that above embodiments are merely to illustrate the technical solution of the application rather than to its protection scope
Limitation, although the application is described in detail referring to above-described embodiment, the those of ordinary skill in the field should
Understand: those skilled in the art read the specific embodiment of application can still be carried out after the application various changes, modification or
Equivalent replacement, but the above change, modification or equivalent replacement, in the application wait authorize or the claim of issued for approval protection model
Within enclosing.
Claims (11)
1. a kind of spray ammonia conglomerate integration AIG for Gas Generator Set waste heat boiler, it is characterised in that: including air inlet pipe, header,
Nipple, spray ammonia conglomerate integration device；The air inlet pipe is connected with the header, and the nipple is non-to be set at equal intervals
The side of the header is provided with the spray ammonia conglomerate integration device on the nipple；The spray ammonia conglomerate integration dress
It sets including air jet pipe, disturbing flow device and nozzle, the air jet pipe is arranged in parallel on the nipple, the disturbing flow device and institute
The non-spaced set of nozzle is stated on the air jet pipe.
2. the spray ammonia conglomerate integration AIG according to claim 1 for Gas Generator Set waste heat boiler, it is characterised in that:
The header both ends are fixed in Gas Generator Set waste heat boiler flue by I-beam, the header and it is coupled it is described into
Tracheae, nipple, spray ammonia conglomerate integration device constitute an injection unit, and multiple injection units are arranged in matrix form
On flue cross section.
3. the spray ammonia conglomerate integration AIG according to claim 1 for Gas Generator Set waste heat boiler, it is characterised in that:
The disturbing flow device is fixed on the air jet pipe of the nozzle two sides, the spoiler size and shape phase of the single nozzle two sides
Together.
4. the spray ammonia conglomerate integration AIG according to claim 3 for Gas Generator Set waste heat boiler, it is characterised in that:
The nozzle opening direction is identical as the flue gas flow direction in Gas Generator Set flue.
5. the spray ammonia conglomerate integration AIG according to claim 2 for Gas Generator Set waste heat boiler, it is characterised in that:
The air jet pipe is non-on the header to be equally spaced, and spacing is non-I-shaped between the adjacent air jet pipe of the I-beam two sides
1.3-1.7 times of spacing between the adjacent air jet pipe of beam two sides.
6. the spray ammonia conglomerate integration AIG according to claim 2 for Gas Generator Set waste heat boiler, it is characterised in that:
Nozzle quantity on the air jet pipe of the I-beam two sides is lower than the nozzle quantity on the air jet pipe of non-two side position of I-beam.
7. the spray ammonia conglomerate integration AIG according to claim 1 for Gas Generator Set waste heat boiler, it is characterised in that:
The nozzle is non-on the air jet pipe to be equally spaced, and spacing is non-header two sides between the adjacent nozzle of the header two sides
Adjacent nozzle between 1.2-1.3 times of spacing.
8. the spray ammonia conglomerate integration AIG according to claim 1 for Gas Generator Set waste heat boiler, it is characterised in that:
The cross sectional shape of the disturbing flow device is semicircle.
9. the spray ammonia conglomerate integration AIG according to claim 8 for Gas Generator Set waste heat boiler, it is characterised in that:
The disturbing flow device is alternately arranged setting according to specified angle on the air jet pipe of the adjacent nozzle two sides.
10. the spray ammonia conglomerate integration AIG according to claim 9 for Gas Generator Set waste heat boiler, it is characterised in that:
The specified angle be the adjacent nozzle two sides disturbing flow device respectively with flue gas flow direction in flue in 50~65 ° and -50~
65 ° are alternately arranged.
11. the spray ammonia conglomerate integration AIG according to claim 2 for Gas Generator Set waste heat boiler, it is characterised in that:
It further include the external regulating valve being connected with the air inlet pipe, each external regulating valve controls an injection unit nozzle
Ammonia spraying amount.
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| CN109045967A (en) * | 2018-09-13 | 2018-12-21 | 苏州西热节能环保技术有限公司 | A kind of spray ammonia conglomerate integration AIG for Gas Generator Set waste heat boiler |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109045967A (en) * | 2018-09-13 | 2018-12-21 | 苏州西热节能环保技术有限公司 | A kind of spray ammonia conglomerate integration AIG for Gas Generator Set waste heat boiler |
| CN109045967B (en) * | 2018-09-13 | 2023-10-24 | 苏州西热节能环保技术有限公司 | Ammonia spraying and mixing integrated AIG for waste heat boiler of gas unit |
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