CN108714368A - A kind of SCR flue gas denitrification systems - Google Patents
A kind of SCR flue gas denitrification systems Download PDFInfo
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- CN108714368A CN108714368A CN201810603466.9A CN201810603466A CN108714368A CN 108714368 A CN108714368 A CN 108714368A CN 201810603466 A CN201810603466 A CN 201810603466A CN 108714368 A CN108714368 A CN 108714368A
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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
- B01D53/8631—Processes characterised by a specific device
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
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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
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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Abstract
The invention belongs to gas denitrifying technology field, specifically a kind of SCR flue gas denitrification systems, including shell, smoke inlet, exhanst gas outlet, cycleization pipe, ammonia jet module and filter；Smoke inlet is located at housing tip, and smoke inlet is connected to the beginning of cycleization pipe；Exhanst gas outlet is located at smoke inlet side, and exhanst gas outlet is connected to the end of cycleization pipe；Cycleization pipe is located in shell, and cycleization pipe is used for denitrating flue gas；Ammonia jet module is located in cycleization pipe, and ammonia jet module is used to provide catalyst for denitration reaction.Filter is located at the bottom end of cycleization pipe, and filter is connected to cycleization pipe, and filter is for the moisture and filtering dust in the flue gas to flowing through cycleization pipe；Flue gas is divided into several shallow bid flue gases, improves time of contact and the contact area of flue gas and ammonia and catalyst, be conducive to the raising of the effect of denitrating flue gas by the present invention by the way that flue gas to be introduced into multiple subcycle pipes in cycleization pipe.
Description
Technical field
The invention belongs to gas denitrifying technology field, specifically a kind of SCR flue gas denitrification systems.
Background technology
Denitrating flue gas refers to that generated NOX is reduced to N2, to remove the NOX in flue gas, can be divided by Processing tecchnics
For wet denitration and Dry denitration.Due to the NOx in the flue gas that is discharged from combustion system, 90% or more is NO, and NO is insoluble in
Water, therefore simple washing method cannot be used to the wet-treating of NOx.The principle of denitrating flue gas is to be oxidized to NO with oxidant
The NO2 of NO2, generation use water or alkaline solution absorption again, to realize denitration.The factor for influencing denitration efficiency includes reaction temperature
Degree, residence time, reducing agent and the mixture homogeneity of flue gas, the stoichiometric ratio of reducing agent and NOx, catalyst performance etc..?
In the case that reaction temperature is certain, the mixability of ammonia and NOx have strong influence to the denitration efficiency of SCR techniques, if
The catalytic effect for improving catalyst, the denitration effect of raising SCR techniques that also can be larger.
Also occur the technical solution of some denitrating flue gas, such as one application No. is CN201510768338 in the prior art
Chinese patent discloses a kind of double-rotation type SCR denitration method and its device, including：" the is provided with along denitrating tower ontology
One and second eddy flow be catalyzed reaction chamber；Flue gas is passed through pipeline and is located at tower body upper side wall；Along flue gas be passed through the inner peripheral surface of pipeline with
And first eddy flow catalysis reaction chamber at the top of inner peripheral surface be respectively disposed with multiple vortex atomizing nozzles；Lead to when flue gas enters flue gas
It when entering pipeline, mutually intervolves persorption with the ammonia of vortex atomizing nozzle injection and closes, the circumference of reaction chamber is catalyzed from upper along the first eddy flow
Spiral is sunk in a manner of the circle of contact under and, and under the action of cyclone, and is catalyzed the circumference of reaction chamber under along the second eddy flow
On and in a manner of the circle of contact spiral ".
The technical solution is catalyzed reaction chamber by the way that two eddy flows are arranged, and is sprayed in a manner of eddy flow by vortex atomizing nozzle
Ammonia realizes being sufficiently mixed for ammonia and flue gas, can improve ammonia and the mixing of NOx to a certain extent；But ammonia is only in cigarette
It being discharged at gas inlet port, the mixability of ammonia and flue gas is limited, meanwhile, flue gas is with big stock flue gas by revolving flow catalytic reaction
Chamber so that contact of the ammonia with flue gas is still limited.
Invention content
In order to make up for the deficiencies of the prior art, a kind of SCR flue gas denitrification systems proposed by the present invention, by introducing flue gas
Into multiple subcycle pipes in cycleization pipe, flue gas is divided into several shallow bid flue gases, improves flue gas and ammonia and catalyst
Time of contact and contact area, be conducive to the raising of the effect of denitrating flue gas；Pass through many places setting ammonia in subcycle pipe
Jet module so that flue gas in flow process fully with mix ammonia mixing, be conducive to denitrating flue gas efficiency improve；Pass through
Filtering module by flue gas moisture and dust point collect respectively, reduce the pollution to air.
The technical solution adopted by the present invention to solve the technical problems is：A kind of SCR denitrating flue gas system of the present invention
System, including shell, smoke inlet, exhanst gas outlet, cycleization pipe, ammonia jet module and filter；The smoke inlet is located at
Housing tip, smoke inlet are connected to the beginning of cycleization pipe；The exhanst gas outlet is located at smoke inlet side, exhanst gas outlet with
The end of cycleization pipe is connected to；The cycleization pipe is located in shell, and cycleization pipe is used for denitrating flue gas；The filter is located at
The bottom end of cycleization pipe, filter are connected to cycleization pipe, filter in flue gas to flowing through cycleization pipe moisture with
Filtering dust；Wherein,
The cycleization pipe includes multiple subcycle pipes；The shape of the subcycle pipe is U-shaped, the tube section of subcycle pipe
It is rectangular, facilitates and place ammonia jet module, subcycle pipe is evenly equipped with a circle centered on gas inlet, flue-gas denitrification can be improved
Efficiency；The ammonia jet module is located in subcycle pipe, and ammonia jet module is used to provide catalyst for denitration reaction.Work
When making, flue gas enters in subcycle pipe, and ammonia jet module makes ammonia to the flue gas injection mixing ammonia in subcycle Bottomhole pressure
Gas and nitrogen oxide NOXFully reaction removes the nitrogen oxide NO in flue gasX。
Preferably, the ammonia jet module includes fixed frame, spray thrower and catalytic plate；The fixed frame is the V at right angle
Font, fixed frame include fixed frame one and fixed frame two；The fixed frame one is located at two adjacent corners of subcycle pipe, fixed frame
Two are located at another two adjacent corners of subcycle pipe, and diagonal fixed frame one is located at fixed frame two in same level, fixed
Spray interface is provided on frame one；The spray thrower is arranged on diagonal fixed frame one and fixed frame two, between spray thrower etc.
Spacing arranged crosswise, one end and the spray orifice of spray thrower；The catalytic plate is between adjacent fixed frame, catalytic plate
For square, the catalyst of denitration reaction is disposed on catalytic plate.When work, pressure value is passed through to spray thrower by spraying interface
High pressure mixing ammonia more than 1.2MPa, effect of the mixing ammonia through spray thrower spray into flue gas, meanwhile, flue gas is by catalysis
Plate is attached with catalyst on catalytic plate, wherein catalyst be include V2O5WO3、Fe2O3、MoO3Equal metal oxides or its joint
The mixture of effect, and with TiO2、Al2O3、ZrO2、SiO2, activated carbon AC etc. is one such or several is used as carrier；Spray thrower
Between equidistant arranged crosswise, by many places to flue gas injection mixing ammonia, the mixability for improving flue gas and mixing ammonia,
Denitration reaction is promoted to be smoothed out.
Preferably, the spray thrower includes entrance, spray section and linkage section；The entrance is that the small other end in one end is big
Hollow pipe, entrance with spray orifice, and entrance with spray interface rotation connection；The spray section is located at entrance
Among linkage section, spray section is hollow circular-tube, and spray section is connected to entrance, and spray section is connected to rotation connection with entrance,
Spray apertures are provided in spray section；It is provided with helicla flute on the inner wall of spray section；The linkage section be solid circular pipe, linkage section with
Fixed frame two is rotatablely connected.When work, high pressure mixing ammonia enters spray section by spraying interface and entrance, because spray section is set
It is equipped with helicla flute, high pressure mixing ammonia enters spray section and drives entire spray thrower rotation so that spray thrower injection mixing ammonia effect
Fruit is more preferable, improves the reaction efficiency of denitration reaction.
Preferably, the end set of the fixed frame is fluted；It is disposed with spring and grip block in the groove；The bullet
One end of spring and the cell wall of groove are connected, and the other end and the grip block of spring are connected, and spring and grip block separate from groove
The both sides of cell wall, grip block is for being clamped catalytic plate.It, can be easily by catalytic plate when needing replacing catalytic plate when work
It removes and re-replaces from grip block, meanwhile, high pressure mixing ammonia impacts on catalytic plate, can promote stretching for groove inner spring
Contracting makes catalytic plate generate shake, and catalytic action of the catalyst to denitration reaction on the catalytic plate of promotion improves denitrating flue gas
Efficiency and denitrating flue gas ability.
Preferably, the filtering module includes filter housing, filter centrifugation kettle, motor, dust collecting pipe and moisture collection pipe；Institute
It states filter housing and is located at subcycle bottom of the tube, filter housing is connected to subcycle pipe；The filter centrifugation kettle is located in filter housing, filter centrifugation kettle
Rotation throws away the dust centrifugation in the flue gas of subcycle Bottomhole pressure, and filter centrifugation kettle is rotated the cigarette of subcycle Bottomhole pressure
Moisture centrifugal filtration in gas；The motor is located at filter housing lower end, and motor is for driving filter centrifugation kettle to rotate；The dust is received
Collector is connected with filter housing top, and dust collecting pipe is located at filter centrifugation kettle upper end-face edge, and dust collecting pipe is filtered for extracting
The dust that centrifugation kettle is centrifuged out；The moisture collection pipe is connected with filter housing lower part, and moisture collection pipe is located under filter centrifugation kettle
Side, moisture collection pipe is for extracting the moisture that filter centrifugation kettle filters out.When work, motor rotation, motor drive filtering from
Heart kettle rotates, and when flue gas flows through filtering module, filter centrifugation kettle throws away the dust centrifugation in flue gas, and dust collecting pipe will be right
The dust extraction storage being thrown out of, and the moisture in flue gas flows downward through filter centrifugation kettle, and taken out by moisture collection pipe
Take collection.
Preferably, the filter centrifugation kettle is to be provided on the kettle wall of the filter centrifugation kettle multiple in flat bowl-shape
Filter opening, and filter opening is arranged along the tangential direction of filter centrifugation kettle inner wall, the rotation direction of the direction and filter centrifugation kettle of filter opening
On the contrary, multiple baffles perpendicular to filter centrifugation kettle inner wall are evenly equipped on the inner wall of filter centrifugation kettle, and baffle and filter opening interval
It arranges, multiple through-holes is provided on baffle.When work, filter centrifugation kettle high-speed rotation, baffle on filter centrifugation kettle is by flue gas
In dust gear under, and make dust under the influence of centrifugal force and make dust to be thrown to outside, the ash that dust collecting pipe will be thrown out of
Dirt extracts storage；Meanwhile the moisture so as to avoid in filter housing opposite with the rotation direction of filter centrifugation kettle of the direction because of filter opening
It flows back on filter centrifugation kettle, facilitates moisture collection pipe to the moisture collection saved bit by bit in filter housing.
Beneficial effects of the present invention are as follows：
1. flue gas is divided into several shallow bids by the present invention by the way that flue gas to be introduced into multiple subcycle pipes in cycleization pipe
Flue gas improves time of contact and the contact area of flue gas and ammonia and catalyst, is conducive to the raising of the effect of denitrating flue gas；
By spraying mould rotation injection mixing ammonia with ammonia, ammonia and flue gas are sufficiently mixed, the efficiency for being conducive to denitrating flue gas carries
It is high；By filtering module by flue gas moisture and dust point collect respectively, reduce the pollution to air.
2. the present invention sprays into ammonia by the way that ammonia jet module is arranged, with the mode of spray thrower rotation injection to flue gas, right
Flue gas has the effect of flow-disturbing, is conducive to being sufficiently mixed for ammonia and flue gas, meanwhile, catalyst is detachable in the form of catalytic plate
Be plugged in subcycle pipe, not only improve catalysis of the catalyst to denitration reaction, the catalyst after use also allows for replacing, and has
Conducive to the progress of denitration reaction.
3. the present invention by be arranged filter, by flue gas moisture and dust detached in a manner of centrifugal filtration, favorably
It is removed in by the particulate matter in flue gas, reduces the pollution to air, environmentally friendly protection after flue gas emission；Meanwhile it is logical
It crosses and arranges filter opening along the tangential direction of filter centrifugation kettle inner wall, be conducive to the removing of moisture after denitration reaction.
Description of the drawings
The invention will be further described below in conjunction with the accompanying drawings.
Fig. 1 is the front view of the present invention；
Fig. 2 is A-A sectional views in Fig. 1；
Fig. 3 is B-B sectional views in Fig. 1；
Fig. 4 is the spray thrower structural schematic diagram of the present invention；
Fig. 5 is the fixed rack structure schematic diagram of the present invention；
Fig. 6 is the filtering module structural schematic diagram of the present invention；
Fig. 7 is C-C sectional views in Fig. 6；
In figure：Shell 1, exhanst gas outlet 3, cycleization pipe 4, subcycle pipe 41, ammonia jet module 5, is consolidated smoke inlet 2
Determine frame 51, groove 511, spring 512, grip block 513, fixed frame 1, spray interface 521, fixed frame 2 522, spray thrower 53,
Entrance 531, spray section 532, linkage section 533, catalytic plate 54, filter 6, filter housing 61, filter centrifugation kettle 62, filter opening 621, gear
Plate 622, motor 63, dust collecting pipe 64, moisture collection pipe 65.
Specific implementation mode
In order to make the technical means, the creative features, the aims and the efficiencies achieved by the present invention be easy to understand, tie below
Specific implementation mode is closed, the present invention is further explained.
As shown in Figures 1 to 7, a kind of SCR flue gas denitrification systems of the present invention, including shell 1, smoke inlet 2, cigarette
Gas outlet 3, cycleization pipe 4, ammonia jet module 5 and filter 6；The smoke inlet 2 is located at 1 top of shell, smoke inlet 2
It is connected to the beginning of cycleization pipe 4；The exhanst gas outlet 3 is located at 2 side of smoke inlet, the end of exhanst gas outlet 3 and cycleization pipe 4
End connection；The cycleization pipe 4 is located in shell 1, and cycleization pipe 4 is used for denitrating flue gas；The filter 6 is located at cycleization pipe
4 bottom end, filter 6 are connected to cycleization pipe 4, and filter 6 is for the moisture and dust in the flue gas to flowing through cycleization pipe 4
Filtering；Wherein,
The cycleization pipe 4 includes multiple subcycle pipes 41；The shape of the subcycle pipe 41 is U-shaped, subcycle pipe 41
Tube section be rectangular, facilitate and place ammonia jet module 5, subcycle pipe 41 is evenly equipped with a circle centered on gas inlet, can
Improve the efficiency of flue-gas denitrification；The ammonia jet module 5 is located in subcycle pipe 41, and ammonia jet module 5 is used to be denitration
Reaction provides catalyst.When work, flue gas enters in subcycle pipe 41, and ammonia jet module 5 is to the flowing in subcycle pipe 41
Flue gas injection mixing ammonia, make ammonia and nitrogen oxide NOXFully reaction removes the nitrogen oxide NO in flue gasX。
As one embodiment of the present invention, the ammonia jet module 5 includes fixed frame 51, spray thrower 53 and catalysis
Plate 54；The fixed frame 51 is the V-shaped at right angle, and fixed frame 51 includes fixed frame 1 and fixed frame 2 522；The fixed frame
One 52 are located at two adjacent corners of subcycle pipe 41, and fixed frame 2 522 is located at another two adjacent corners of subcycle pipe 41, and diagonal
Fixed frame 1 and fixed frame 2 522 be located in same level, be provided on fixed frame 1 and spray interface 521；It is described
Spray thrower 53 is arranged on diagonal fixed frame 1 and fixed frame 2 522, equidistant arranged crosswise between spray thrower 53, spray
One end of device 53 is connected to spray interface 521；For the catalytic plate 54 between adjacent fixed frame 51, catalytic plate 54 is square
Shape is disposed with the catalyst of denitration reaction on catalytic plate 54.When work, pressure is passed through to spray thrower 53 by spraying interface 521
High pressure mixing ammonia of the value more than 1.2MPa, effect of the mixing ammonia through spray thrower 53 spray into flue gas, meanwhile, flue gas is by urging
Change plate 54, be attached with catalyst on catalytic plate 54, wherein catalyst be include V2O5WO3、Fe2O3、MoO3Equal metal oxides or
The mixture of its synergy, and with TiO2、Al2O3、ZrO2、SiO2, activated carbon AC etc. is one such or several is used as carrier；
Equidistant arranged crosswise between spray thrower 53, by, to flue gas injection mixing ammonia, improving flue gas in many places and mixing ammonia
Mixability promotes denitration reaction to be smoothed out.
As one embodiment of the present invention, the spray thrower 53 includes entrance 531, spray section 532 and linkage section
533；The entrance 531 is the big hollow pipe of the small other end in one end, and entrance 531 is connected to spray interface 521, and entrance
531 are rotatablely connected with spray interface 521；The spray section 532 is located among entrance 531 and linkage section 533, spray section 532
For hollow circular-tube, spray section 532 is connected to entrance 531, and spray section 532 is connected to rotation connection, spray section with entrance 531
Spray apertures are provided on 532；It is provided with helicla flute on the inner wall of spray section 532；The linkage section 533 is solid circular pipe, connection
Section 533 is rotatablely connected with fixed frame 2 522.When work, high pressure mixing ammonia is entered by spraying interface 521 and entrance 531
Spray section 532, because spray section 532 is provided with helicla flute, high pressure mixing ammonia enters spray section 532 and entire spray thrower 53 is driven to revolve
Turn so that the injection mixing ammonia effect of spray thrower 53 is more preferable, improves the reaction efficiency of denitration reaction.
As one embodiment of the present invention, the end set fluted 511 of the fixed frame 51；The groove 511
Inside it is disposed with spring 512 and grip block 513；One end of the spring 512 and the cell wall of groove 511 are connected, spring 512 it is another
End is connected with grip block 513, and spring 512 and grip block 513 separate from the both sides of 511 cell wall of groove, and grip block 513 is used for
Catalytic plate 54 is clamped.When work, when needing replacing catalytic plate 54, easily catalytic plate 54 can be taken from grip block 513
It descends and re-replaces, meanwhile, high pressure mixing ammonia impacts on catalytic plate 54, can promote the flexible of 511 inner spring 512 of groove,
Catalytic plate 54 is set to generate shake, it is de- to improve flue gas for catalytic action of the catalyst to denitration reaction on the catalytic plate 54 of promotion
The efficiency of nitre and the ability of denitrating flue gas.
As one embodiment of the present invention, the filtering module include filter housing 61, filter centrifugation kettle 62, motor 63,
Dust collecting pipe 64 and moisture collection pipe 65；The filter housing 61 is located at 41 bottom of subcycle pipe, and filter housing 61 connects with subcycle pipe 41
It is logical；The filter centrifugation kettle 62 is located in filter housing 61, and the rotation of filter centrifugation kettle 62 will be in the flue gas that flowed in subcycle pipe 41
Dust centrifugation is thrown away, and filter centrifugation kettle 62 rotates the moisture centrifugal filtration in the flue gas that will be flowed in subcycle pipe 41；The electricity
Machine 63 is located at 61 lower end of filter housing, and motor 63 is for driving filter centrifugation kettle 62 to rotate；On the dust collecting pipe 64 and filter housing 61
Portion connects, and dust collecting pipe 64 is located at 62 upper end-face edge of filter centrifugation kettle, and dust collecting pipe 64 is for extracting filter centrifugation kettle
62 dusts being centrifuged out；The moisture collection pipe 65 is connected with 61 lower part of filter housing, and moisture collection pipe 65 is located at filter centrifugation kettle
62 lower sections, moisture collection pipe 65 is for extracting the moisture that filter centrifugation kettle 62 filters out.When work, motor 63 rotates, motor
63 drive filter centrifugation kettles 62 to rotate, and when flue gas flows through filtering module, filter centrifugation kettle 62 is by the dust centrifugal drying in flue gas
Go out, dust collecting pipe 64 will store the dust extraction being thrown out of, and the moisture in flue gas is downward through filter centrifugation kettle 62
Flowing, and extracted and collect by moisture collection pipe 65.
As one embodiment of the present invention, the filter centrifugation kettle 62 is in flat bowl-shape, the filter centrifugation
Multiple filter openings 621 are provided on the kettle wall of kettle 62, and filter opening 621 is arranged along the tangential direction of 62 inner wall of filter centrifugation kettle, filter
The rotation direction of the direction in hole 621 and filter centrifugation kettle 62 on the contrary, be evenly equipped on the inner wall of filter centrifugation kettle 62 it is multiple perpendicular to
The baffle 622 of 62 inner wall of filter centrifugation kettle, and baffle 622 and 621 arranged for interval of filter opening are provided with multiple through-holes on baffle 622.
When work, 62 high-speed rotation of filter centrifugation kettle, baffle 622 on filter centrifugation kettle 62 makes ash by under the dust gear in flue gas
Dirt makes dust be thrown to outside under the influence of centrifugal force, and dust collecting pipe 64 stores the dust extraction being thrown out of；Meanwhile because
The direction of filter opening 621 moisture so as to avoid in filter housing 61 opposite with the rotation direction of filter centrifugation kettle 62 flow back into filtering from
On heart kettle 62, moisture collection pipe 65 is facilitated to the moisture collection saved bit by bit in filter housing 61.
When work, mixing ammonia is introduced at spray interface 521, and pressure is passed through to spray thrower 53 by spraying interface 521
Force value is more than the high pressure mixing ammonia of 1.2MPa, and mixing effect of the ammonia through spray thrower 53 is sprayed into flue gas, high pressure mixing ammonia
Gas enters spray section 532 by spraying interface 521 and entrance 531, because spray section 532 is provided with helicla flute, high pressure mixing ammonia
Gas enters spray section 532 and entire spray thrower 53 is driven to rotate so that the injection mixing ammonia effect of spray thrower 53 is more preferable, improves de-
The reaction efficiency of nitre reaction；Meanwhile flue gas passes through catalytic plate 54, and catalyst is attached on catalytic plate 54, wherein catalyst is packet
Include V2O5WO3、Fe2O3、MoO3The mixture of equal metal oxides or its synergy, and with TiO2、Al2O3、ZrO2、SiO2, it is living
Property charcoal AC etc. is one such or several is used as carrier；Equidistant arranged crosswise between spray thrower 53, by many places to flue gas
Injection mixing ammonia, improves flue gas and the mixability for mixing ammonia, denitration reaction is promoted to be smoothed out；It is catalyzed when needing replacing
When plate 54, can easily catalytic plate 54 be removed and be re-replaced from grip block 513, meanwhile, the impact of high pressure mixing ammonia
On catalytic plate 54, the flexible of 511 inner spring 512 of groove can be promoted, so that catalytic plate 54 is generated and shake, on the catalytic plate 54 of promotion
Catalytic action of the catalyst to denitration reaction, improve the efficiency of denitrating flue gas and the ability of denitrating flue gas.When flue gas into
When entering filtering module, motor 63 rotates, and motor 63 drives filter centrifugation kettle 62 to rotate, 62 high-speed rotation of filter centrifugation kettle, filtering
Under baffle 622 on centrifugation kettle 62 keeps off the dust in flue gas, and making dust under the influence of centrifugal force makes dust be thrown to outside
Side, dust collecting pipe 64 store the dust extraction being thrown out of；Meanwhile turn of the direction because of filter opening 621 and filter centrifugation kettle 62
Dynamic direction flows back into so as to avoid the moisture in filter housing 61 on filter centrifugation kettle 62 on the contrary, facilitates moisture collection pipe 65 to filter
Moisture collection in shell 61, and processed flue gas is gushed out by exhanst gas outlet 3 in cycleization pipe 4.
Although the present invention is illustrated by specific embodiment, it will be appreciated by those skilled in the art that, it is not departing from
In the case of the scope of the invention, various transformation and equivalent substitute can also be carried out to the present invention.In addition, being directed to particular condition or material
Material, can do various modifications, without departing from the scope of the present invention to the present invention.Therefore, the present invention is not limited to disclosed tool
Body embodiment, and should include the whole embodiments fallen within the scope of the appended claims.
Claims (6)
1. a kind of SCR flue gas denitrification systems, including shell (1), smoke inlet (2), exhanst gas outlet (3), cycleization pipe (4), ammonia
Gas jet module (5) and filter (6)；The smoke inlet (2) is located at shell (1) top, and smoke inlet (2) is managed with cycleization
(4) beginning connection；The exhanst gas outlet (3) is located at smoke inlet (2) side, the end of exhanst gas outlet (3) and cycleization pipe (4)
End connection；The cycleization pipe (4) is located in shell (1), and cycleization manages (4) and is used for denitrating flue gas；The filter (6) is located at
Cycleization manages the bottom end of (4), and filter (6) is connected to cycleization pipe (4), and filter (6) is used to manage (4) to flowing through cycleization
Moisture in flue gas and filtering dust；It is characterized in that：The cycleization pipe (4) includes multiple subcycle pipes (41)；The son
The shape of circulation pipe (41) is U-shaped, and the tube section of subcycle pipe (41) is rectangular, and subcycle pipe (41) is centered on gas inlet
It is evenly equipped with a circle；The ammonia jet module (5) is located in subcycle pipe (41), and ammonia jet module (5) is used to be that denitration is anti-
Catalyst should be provided.
2. a kind of SCR flue gas denitrification systems according to claim 1, it is characterised in that：Ammonia jet module (5) packet
Include fixed frame (51), spray thrower (53) and catalytic plate (54)；The fixed frame (51) is the V-shaped at right angle, fixed frame (51) packet
Include fixed frame one (52) and fixed frame two (522)；The fixed frame one (52) is located at two adjacent corners of subcycle pipe (41), Gu
Determine another two adjacent corners that frame two (522) is located at subcycle pipe (41), and diagonal fixed frame one (52) and fixed frame two (522)
In same level, spray interface (521) is provided on fixed frame one (52)；The spray thrower (53) is arranged in diagonal
On fixed frame one (52) and fixed frame two (522), equidistant arranged crosswise between spray thrower (53), one end of spray thrower (53) with
Interface (521) is sprayed to be connected to；The catalytic plate (54) is disposed with de- between adjacent fixed frame (51) on catalytic plate (54)
The catalyst of nitre reaction.
3. a kind of SCR flue gas denitrification systems according to claim 2, it is characterised in that：The spray thrower (53) include into
Mouth section (531), spray section (532) and linkage section (533)；The entrance (531) is the big hollow pipe of the small other end in one end, is entered
Mouth section (531) is connected to spray interface (521), and entrance (531) is rotatablely connected with spray interface (521)；The spray section
(532) it is located at entrance (531) and linkage section (533) is intermediate, spray section (532) is hollow circular-tube, spray section (532) and entrance
Section (531) connection, spray section (532) are connected to rotation connection with entrance (531), and spray section is provided with spray apertures on (532)；Spray
It is provided with helicla flute on the inner wall of leaching section (532)；The linkage section (533) is solid circular pipe, linkage section (533) and fixed frame two
(522) it is rotatablely connected.
4. a kind of SCR flue gas denitrification systems according to claim 2, it is characterised in that：The end of the fixed frame (51)
It is arranged fluted (511)；It is disposed with spring (512) and grip block (513) in the groove (511)；The one of the spring (512)
End and the cell wall of groove (511) are connected, and the other end and the grip block (513) of spring (512) are connected, and spring (512) and clamping
Plate (513) separates from the both sides of groove (511) cell wall, and grip block (513) is for being clamped catalytic plate (54).
5. a kind of SCR flue gas denitrification systems according to claim 1, it is characterised in that：The filtering module includes filter housing
(61), filter centrifugation kettle (62), motor (63), dust collecting pipe (64) and moisture collection pipe (65)；The filter housing (61) is located at
Subcycle pipe (41) bottom, filter housing (61) are connected to subcycle pipe (41)；The filter centrifugation kettle (62) is located in filter housing (61),
Filter centrifugation kettle (62) rotation throws away the dust centrifugation in the flue gas flowed in subcycle pipe (41), and filter centrifugation kettle (62) turns
The dynamic moisture centrifugal filtration by the flue gas flowed in subcycle pipe (41)；The motor (63) is located at filter housing (61) lower end, electricity
Machine (63) is for driving filter centrifugation kettle (62) to rotate；The dust collecting pipe (64) is connected with filter housing (61) top, and dust is received
Collector (64) is located at filter centrifugation kettle (62) upper end-face edge, and dust collecting pipe (64) is for extracting filter centrifugation kettle (62) centrifugation
Dust out；The moisture collection pipe (65) is connected with filter housing (61) lower part, and moisture collection pipe (65) is located at filter centrifugation kettle
(62) lower section, moisture collection pipe (65) is for extracting the moisture that filter centrifugation kettle (62) filters out.
6. a kind of SCR flue gas denitrification systems according to claim 5, it is characterised in that：The filter centrifugation kettle (62) is
In flat bowl-shape, multiple filter openings (621) are provided on the kettle wall of the filter centrifugation kettle (62), and filter opening (621) is along mistake
The tangential direction arrangement of filter centrifugation kettle (62) inner wall, the direction of filter opening (621) are opposite with the rotation direction of filter centrifugation kettle (62)；
Multiple baffles (622) perpendicular to filter centrifugation kettle (62) inner wall, and baffle are evenly equipped on the inner wall of filter centrifugation kettle (62)
(622) and filter opening (621) arranged for interval, baffle are provided with multiple through-holes on (622).
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| CN108714368B (en) | 2021-01-08 |
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