CN105597530B - A kind of denitrating system applied in pulverized-coal fired boiler - Google Patents
A kind of denitrating system applied in pulverized-coal fired boiler Download PDFInfo
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- CN105597530B CN105597530B CN201511010060.2A CN201511010060A CN105597530B CN 105597530 B CN105597530 B CN 105597530B CN 201511010060 A CN201511010060 A CN 201511010060A CN 105597530 B CN105597530 B CN 105597530B
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- flue
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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
- B01D53/8628—Processes characterised by a specific catalyst
-
- 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
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
-
- 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
- B01D53/76—Gas phase processes, e.g. by using aerosols
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
-
- 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
-
- 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
Abstract
The invention discloses the denitrating system applied in a kind of pulverized-coal fired boiler, it is desirable to provide a kind of to complete the denitrating system of denitration transformation in the case where the economizer and air preheater position for keeping boiler are motionless.It includes high-temperature flue, economizer, air preheater, intensive flue transformational structure and the SCR reactors outside high-temperature flue, intensive flue transformational structure includes flue changeable and the tilt clapboard being arranged in flue changeable, and the upper end of flue changeable is provided with the first flue changeable entrance, and flue changeable side is exported provided with the first flue changeable, flue changeable side is provided with the second flue changeable entrance, and the lower end of flue changeable is exported provided with the second flue changeable；First flue changeable entrance is connected with the outlet of economizer, and the outlet of the first flue changeable is connected with the smoke inlet of SCR reactors, and the exhaust opening of SCR reactors is connected with the second flue changeable entrance, and the outlet of the second flue changeable is connected with the entrance of air preheater.
Description
Technical field
The present invention relates to pulverized-coal fired boiler exhaust system, and in particular to the denitrating system applied in a kind of pulverized-coal fired boiler.
Background technology
With the increasingly raising of environmental requirement, to N0x in existing thermal power plant, the discharge index requirement of S02 and flue dust is got over
Come stricter.Emission limit requirement of the national standard now performed to N0x is high, and the requirement of minimum discharge is even less than 50 mg/m3.Mesh
Preceding built large quantities of power plant are not up to standard because discharging, and denitration transformation need to be carried out, with emission request to be reached.At present, the side of most main flow
Method is to use SCR reactors（Selective Catalytic Reduction）As SCR technology.
SCR reactors are main by SCR catalytic reactors, ammonia spraying system, the deposit of ammonia and supply system, soot blower system
Deng composition.The arrangement of SCR catalytic reactors, typically uses high dirt arrangement, that is, is arranged in economizer both at home and abroad at present
In high-temperature flue between air preheater；In the position, flue-gas temperature can reach the optimum temperature of reaction.Flue gas is by high temperature cigarette
The outlet of the economizer in road enters in a vertically arranged SCR reactor, provided with ammonia spray before flue gas enters catalyst layer
System is penetrated, flue gas enters catalyst layer after being sufficiently mixed with ammonia, carries out catalyst reaction, slough NOX.Reacted flue gas enters
Enter after air preheater, electric cleaner, air-introduced machine and desulfurizer, be discharged into chimney.
The pulverized-coal fired boiler for needing denitration to transform at present, the overwhelming majority does not reserve the arrangement space of SCR reactors, thus needs
After flue gas is first drawn between economizer and air preheater, led back again after SCR reactors；But the coal-fired pot of the overwhelming majority
Do not there are enough spaces to draw flue gas between the economizer and air preheater of stove to introduce again, its need to the economizer on top or
The air preheater of person bottom is transformed and increases the space between economizer and air preheater；Regardless of whether being to economizer or empty pre-
The transformation of device, not only brings influence, and significantly increase cost and construction period to the original performance of boiler.
The content of the invention
The invention aims to overcome the deficiencies in the prior art de- there is provided what is applied in a kind of pulverized-coal fired boiler
Nitre system, it can complete denitration transformation, make SCR anti-in the case where the economizer and air preheater position for keeping boiler are motionless
Device normal work is answered, with fume emission requirement to be reached.
The technical scheme is that：
The denitrating system applied in a kind of pulverized-coal fired boiler, including high-temperature flue, the economizer being arranged in high-temperature flue and
Air preheater, in addition to be arranged in high-temperature flue and positioned at the intensive flue transformational structure between economizer and air preheater and position
In the SCR reactors outside high-temperature flue, the intensive flue transformational structure includes flue changeable and is arranged in flue changeable
And flue changeable is separated into two-part tilt clapboard up and down, the upper end of the flue changeable enters provided with the first flue changeable
Mouthful, flue changeable side is above and positioned at tilt clapboard top provided with the outlet of the first flue changeable, and flue changeable is upper sideways and is located at
The second flue changeable entrance is provided with below tilt clapboard, the lower end of the flue changeable is exported provided with the second flue changeable；It is described
First flue changeable entrance is connected with the outlet of economizer, the first flue changeable outlet and the smoke inlet of SCR reactors
It is connected, the exhaust opening of SCR reactors is connected with the second flue changeable entrance, the outlet of the second flue changeable enters with air preheater
Mouth is connected.
The size of the flue changeable of this programme intensive style flue transformational structure in the height direction（I.e. two above and below flue changeable
Spacing between end）Can greatly it be compressed, it smoothly can first draw flue gas between economizer and air preheater
After going out, in the case of being led back again after SCR reactors, greatly reduce the size of flue changeable in the height direction, make it
Between the economizer and air preheater that may be mounted at current existing coal-burning boiler；Thus applied in the pulverized-coal fired boiler of this programme
Denitrating system can complete denitration transformation, react SCR in the case where the economizer and air preheater position for keeping boiler are motionless
Device normal work, with fume emission requirement to be reached.
Preferably, SCR reactors include SCR flues and the ammonia-gas spraying device being arranged on SCR flues, it is described
SCR flues include vertical smoke-intake pipe road, and the ammonia-gas spraying device includes ammonia admission line and some circumferences are distributed on vertically
Ammonia shower nozzle on smoke-intake pipe road,
Spray ammonia self-adaption regulation system is additionally provided with the vertical smoke-intake pipe road, if the spray ammonia self-adaption regulation system includes
Dry to spray ammonia adaptive regulating mechanism correspondingly with ammonia shower nozzle, the spray ammonia adaptive regulating mechanism includes being arranged on vertically
Automatic adjusument aerofoil in smoke-intake pipe road, is arranged on the horizontal cylinder body on vertical smoke-intake pipe road, is arranged in horizontal cylinder body
First piston body and second piston body, the first connecting rod of connection first piston body and second piston body, are arranged on horizontal cylinder body
Air inlet and exhaust outlet, the air inlet is connected with ammonia admission line, the exhaust outlet and corresponding ammonia shower nozzle
Import is connected；
The lower end of the automatic adjusument aerofoil is hinged on the medial surface in vertical smoke-intake pipe road, and upper end is toward vertical smoke-intake pipe
The center position in road extends obliquely, and one end of the horizontal cylinder body is located in vertical smoke-intake pipe road, and the other end is located to enter vertically
Outside in smoke pipeline, and the one end open of the horizontal cylinder body in vertical smoke-intake pipe road, the water outside vertical smoke-intake pipe road
One end of flat cylinder body is provided with ventilative through hole, and side is provided with the first limited block and the second limited block in the horizontal cylinder body, and the
The end of the close horizontal cylinder body in vertical smoke-intake pipe road of one limited block,
The first piston body, second piston body, air inlet and exhaust outlet be located at the first limited block and the second limited block it
Between, and first piston body leans on close to the first limited block, positioned at the end of second piston body and horizontal cylinder body in the horizontal cylinder body
Provided with compression spring, and compression spring is located at the same side of second piston body, the automatic adjusument aerofoil with the second limited block
It is connected between first piston body by second connecting rod, the first piston body end portion that one end of second connecting rod is hinged, other end hinge
Connect the top of automatic adjusument aerofoil；
When first piston body is resisted against on the first limited block：The air inlet is located at first piston body and second piston body
Between, the part in the exhaust outlet is sealed by second piston body to be hidden；
When second piston body is resisted against on the second limited block：The air inlet and exhaust outlet are located at first piston body and the
Between two piston bodies.
After being entered due to flue gas by the outlet of economizer in the vertical smoke-intake pipe road of vertically arranged SCR reactors, exist
The problem of air-flow velocity in vertical smoke-intake pipe road is uneven, and the ammonia emitted dose phase of each ammonia shower nozzle of ammonia-gas spraying device
Together；This allows for the flue gas of each several part and the mixed proportion of ammonia in vertical smoke-intake pipe road and had differences, and air-flow velocity is bigger
Part ammonia ratio is lower so that flue gas mixes uneven with ammonia, and then influences catalytic effect of the flue gas in catalyst layer.
This is improved this programme to this problem, and spray ammonia self-adaption regulation system can be by the air-flow velocity in vertical smoke-intake pipe road
Carry out adaptive regulation ammonia emitted dose, the bigger ammonia emitted dose of air-flow velocity also increases accordingly, so as to be effectively improved vertically
The problem of flue gas of each several part and the mixed proportion of ammonia have differences in smoke-intake pipe road, makes flue gas mix homogeneous with ammonia, protects
Demonstrate,prove catalytic effect of the flue gas in catalyst layer.
Preferably, automatic adjusument aerofoil is located at the underface of corresponding ammonia shower nozzle.
Preferably, ammonia shower nozzle is located at sustained height, the inner chamber of the puff prot of ammonia shower nozzle and vertical smoke-intake pipe road connects
Logical, the import of ammonia shower nozzle is located at the outside in vertical smoke-intake pipe road.
Preferably, horizontal cylinder body radially extending along vertical smoke-intake pipe road.
Preferably, ammonia admission line include being set in annular mozzle on vertical smoke-intake pipe road and with annular water conservancy diversion
The ammonia-feeding pipe road that pipe is connected, the air inlet is connected by the first connecting tube with annular mozzle.
Preferably, the top edge of tilt clapboard is close to the upper end of flue changeable, the lower edge of tilt clapboard is close to conversion
The lower end of flue.
Preferably, economizer is located at the top of air preheater.
Preferably, the outlet of the first flue changeable is located at the opposite sides of flue changeable with the second flue changeable entrance.
The beneficial effects of the invention are as follows：Can be complete in the case where the economizer and air preheater position for keeping boiler are motionless
Into denitration transformation, make SCR reactor normal works, with fume emission requirement to be reached.
Brief description of the drawings
Fig. 1 is a kind of structural representation of denitrating system applied in the pulverized-coal fired boiler of the present invention.
Fig. 2 is a kind of structural representation of the intensive flue transformational structure of the present invention.
Fig. 3 is a kind of structural representation of the SCR reactors of the present invention.
Fig. 4 is the partial enlarged drawing at A in Fig. 3.
Fig. 5 is the partial enlarged drawing at A in Fig. 4.
In figure：Economizer 1, intensive flue transformational structure 2, the first flue changeable export the 21, second flue changeable entrance
22nd, flue changeable 23, tilt clapboard 24, the first flue changeable entrance 25, the second flue changeable outlet 26, smoke discharge tube road 3,
Air preheater 4, flue gas is discharged into pipeline 5, vertical smoke-intake pipe road 6, spray ammonia adaptive regulating mechanism 7, automatic adjusument aerofoil 71, second
Connecting rod 72, horizontal cylinder body 73, second piston body 74, air inlet 75, the first limited block 76, first piston body 77, first connecting rod 78,
And exhaust outlet 79, the second limited block 710, compression spring 711, ventilative through hole 712, ammonia-gas spraying device 8, ammonia shower nozzle 81, second connect
Adapter 82, the first connecting tube 83, ammonia-feeding pipe road 84, annular mozzle 85, SCR catalytic device 9.
Embodiment
The present invention is described in further detail with embodiment below in conjunction with the accompanying drawings：
As shown in Figure 1, Figure 2, Figure 3 shows, the denitrating system applied in a kind of pulverized-coal fired boiler includes high-temperature flue, is arranged on high temperature
Economizer 1 and air preheater 4 in flue, are arranged in high-temperature flue and positioned at the intensive flue between economizer and air preheater
Transformational structure 2 and the SCR reactors outside high-temperature flue.Economizer is located at the top of air preheater.SCR reactors include SCR
Flue, is arranged on ammonia-gas spraying device 8 and SCR catalytic device 9 on SCR flues, and ammonia-gas spraying device and SCR catalytic device
Successively arranged along the air current flow direction of SCR flues.SCR flues include vertical smoke-intake pipe road 6.
Intensive flue transformational structure includes flue changeable 23 and is arranged in flue changeable and is separated into flue changeable
Two-part tilt clapboard 24 up and down.The top edge of tilt clapboard is leaned on close to the upper end of flue changeable, the lower edge of tilt clapboard
The lower end of nearly flue changeable.The upper end of flue changeable is provided with the first flue changeable entrance 25.Flue changeable side, which is gone up and is located at, inclines
Provided with the first flue changeable outlet 21 above inclined clapboard.Flue changeable side is upper and the second conversion is provided with below tilt clapboard
Flue entrance 22.The lower end of flue changeable is provided with the second flue changeable outlet 26.First flue changeable is exported and the second conversion cigarette
Road entrance is located at the opposite sides of flue changeable.
First flue changeable entrance is connected with the outlet of economizer.The outlet of first flue changeable is entered with SCR reactors
Mouth is connected, specifically, the lower port phase that the outlet of the first flue changeable passes through smoke discharge tube road 3 and vertical smoke-intake pipe road
Connection.The lower port in vertical smoke-intake pipe road is located at the smoke inlet of SCR reactors.The exhaust opening of SCR reactors and the second conversion
Flue entrance is connected, and specifically, pipe is discharged into by flue gas between the exhaust opening of SCR reactors and the second flue changeable entrance
Road 5 is connected.The outlet of second flue changeable is connected with the entrance of air preheater.
As shown in Figure 1 and Figure 2, the size of the flue changeable of the intensive flue transformational structure of this programme in the height direction（I.e.
Spacing between flue changeable upper and lower ends）Can greatly be compressed, its can smoothly by flue gas in economizer and
After first being drawn between air preheater, in the case of being led back again after SCR reactors, greatly reduce flue changeable in short transverse
On size, it is may be mounted between the economizer and air preheater of current existing coal-burning boiler；Thus the coal of this programme
The denitrating system applied in powder boiler can complete denitration in the case where the economizer and air preheater position for keeping boiler are motionless
Transformation.
As shown in Figure 3, Figure 4, ammonia-gas spraying device 8 includes ammonia admission line and some circumferences are distributed on vertical smoke-intake pipe road
Ammonia shower nozzle 81.Ammonia admission line include being set in annular mozzle 85 on vertical smoke-intake pipe road and with annular mozzle
The ammonia-feeding pipe road 84 being connected.Each ammonia shower nozzle is located at sustained height.The puff prot of ammonia shower nozzle is interior with vertical smoke-intake pipe road
Chamber is connected, and the import of ammonia shower nozzle is located at the outside in vertical smoke-intake pipe road.
As shown in Fig. 3, Fig. 4, Fig. 5, spray ammonia self-adaption regulation system is additionally provided with vertical smoke-intake pipe road.The spray ammonia is adaptive
Regulating system includes some and ammonia shower nozzle and sprays ammonia adaptive regulating mechanism 7 correspondingly.Spray ammonia adaptive regulating mechanism bag
The automatic adjusument aerofoil 71 being arranged in vertical smoke-intake pipe road is included, the horizontal cylinder body 73 on vertical smoke-intake pipe road is arranged on, if
First piston body 77 and second piston body 74 in horizontal cylinder body are put, connection first piston body connects with the first of second piston body
Bar 78, is arranged on air inlet 75 and exhaust outlet 79 on horizontal cylinder body.Air inlet is connected with ammonia admission line, specifically
It is that air inlet is connected by the first connecting tube 83 with annular mozzle.Exhaust outlet is connected with the import of corresponding ammonia shower nozzle
Connect, specifically, be connected between exhaust outlet and the import of corresponding ammonia shower nozzle by the second connecting tube 82.
Horizontal cylinder body is radially extended along vertical smoke-intake pipe road.One end of horizontal cylinder body is located in vertical smoke-intake pipe road, separately
One end is located at outside in vertical smoke-intake pipe road, and the one end open of the horizontal cylinder body in vertical smoke-intake pipe road, positioned at vertical
One end of horizontal cylinder body outside smoke-intake pipe road is provided with ventilative through hole 712.In horizontal cylinder body side provided with the first limited block 76 and
Second limited block 710, and the first limited block is close to the end of the horizontal cylinder body in vertical smoke-intake pipe road.First piston body,
Second piston body, air inlet and exhaust outlet are located between the first limited block and the second limited block, and first piston body is close to first
Limited block is leaned on.Be provided with compression spring 711 positioned at the end of second piston body and horizontal cylinder body in horizontal cylinder body, and compression spring with
Second limited block is located at the same side of second piston body.
Automatic adjusument aerofoil is located at the underface of corresponding ammonia shower nozzle.The lower end of automatic adjusument aerofoil is hinged on perpendicular
On the medial surface of straight smoke pipeline, the center position in upper end toward the vertical smoke-intake pipe road of automatic adjusument aerofoil extends obliquely.
It is connected between automatic adjusument aerofoil and first piston body by second connecting rod 72.The first piston that one end of second connecting rod is hinged
Body end portion, the other end is hinged the top of automatic adjusument aerofoil.
As shown in figure 5, when first piston body is resisted against on the first limited block：Air inlet is located at first piston body and second
Between piston body, the part in exhaust outlet is sealed by second piston body to be hidden.
When second piston body is resisted against on the second limited block：Air inlet and exhaust outlet are located at first piston body and second and lived
Between cock body.
The specific work process for the denitrating system applied in the pulverized-coal fired boiler of the present embodiment is as follows：
First, flue gas sequentially passes through the first flue changeable entrance, the outlet of the first flue changeable and cigarette by the outlet of economizer
Gas discharge line enters in SCR reactors.
Second, after flue gas enters SCR reactors：
First, flue gas passes through vertical smoke-intake pipe road, and during flue gas passes through vertical smoke-intake pipe road, ammonia-gas spraying device
The lasting injection ammonia of ammonia shower nozzle.
On the other hand, as shown in figure 4, during flue gas passes through vertical smoke-intake pipe road：Air-flow flowing through from bottom to top
During automatic adjusument aerofoil, due to the effect of wind-force, the upper end of automatic adjusument aerofoil is by toward vertical smoke-intake pipe road
Medial surface direction is rotated；And the air-flow velocity at the position in the vertical smoke-intake pipe road where automatic adjusument aerofoil is bigger, then
The distance that the medial surface direction in the upper end of automatic adjusument aerofoil toward vertical smoke-intake pipe road is rotated is also bigger；
As shown in figure 5, when the medial surface direction in upper end toward the vertical smoke-intake pipe road of automatic adjusument aerofoil is rotated, second
Connecting rod will drive first piston body, second piston body toward the second spacing Block direction movement, so as to increase the aperture of exhaust outlet；And
The distance that the medial surface direction in the upper end of automatic adjusument aerofoil toward vertical smoke-intake pipe road is rotated is bigger, then first piston body, the
Two piston bodies are also bigger toward the distance of the second spacing Block direction movement, and the aperture of corresponding exhaust outlet is also bigger；And exhaust outlet
The ammonia emitted dose of the more big then ammonia shower nozzle of aperture is also bigger.
Thus the spray ammonia self-adaption regulation system of the present embodiment can be come from by the air-flow velocity in vertical smoke-intake pipe road
The regulation ammonia emitted dose of adaptation, the bigger ammonia emitted dose of air-flow velocity also increases accordingly, and cigarette is entered vertically so as to be effectively improved
The problem of flue gas of each several part and the mixed proportion of ammonia have differences in pipeline, makes flue gas mix homogeneous with ammonia, it is ensured that cigarette
Catalytic effect of the gas in catalyst layer.
Then, enter after flue gas is sufficiently mixed with ammonia in SCR catalytic device, carry out catalyst reaction, slough NOX。
Followed by reacted flue gas sequentially passes through flue gas and is discharged into pipeline, the second flue changeable entrance and the second conversion cigarette
Road outlet enters air preheater, and is discharged by air preheater.
Claims (8)
1. the denitrating system applied in a kind of pulverized-coal fired boiler, including high-temperature flue, are arranged on economizer and sky in high-temperature flue
Pre- device, it is characterized in that, in addition to be arranged in high-temperature flue and positioned at the intensive flue conversion between economizer and air preheater
Structure and the SCR reactors outside high-temperature flue,
The intensive flue transformational structure includes flue changeable and is arranged in flue changeable and is separated into flue changeable
Under two-part tilt clapboard, the upper end of the flue changeable is provided with the first flue changeable entrance, and flue changeable side is upper and position
Provided with the outlet of the first flue changeable above tilt clapboard, flue changeable side above and below tilt clapboard is provided with second turn
Flue entrance is changed, the lower end of the flue changeable is exported provided with the second flue changeable；The first flue changeable entrance is with saving coal
The outlet of device is connected, and the first flue changeable outlet is connected with the smoke inlet of SCR reactors, the smoke evacuation of SCR reactors
Mouth is connected with the second flue changeable entrance, and the outlet of the second flue changeable is connected with the entrance of air preheater；
The SCR reactors include SCR flues and the ammonia-gas spraying device being arranged on SCR flues, the SCR fume pipes
Road includes vertical smoke-intake pipe road, and the ammonia-gas spraying device includes ammonia admission line and some circumferences are distributed on vertical smoke-intake pipe road
Ammonia shower nozzle,
Be additionally provided with the vertical smoke-intake pipe road spray ammonia self-adaption regulation system, the spray ammonia self-adaption regulation system include it is some with
Ammonia shower nozzle sprays ammonia adaptive regulating mechanism correspondingly, and the spray ammonia adaptive regulating mechanism includes being arranged on enters cigarette vertically
Automatic adjusument aerofoil in pipeline, is arranged on the horizontal cylinder body on vertical smoke-intake pipe road, is arranged on first in horizontal cylinder body
Piston body and second piston body, the first connecting rod of connection first piston body and second piston body, are arranged on entering on horizontal cylinder body
Gas port and exhaust outlet, the air inlet are connected with ammonia admission line, the import of the exhaust outlet and corresponding ammonia shower nozzle
It is connected；
The lower end of the automatic adjusument aerofoil is hinged on the medial surface in vertical smoke-intake pipe road, and upper end is toward vertical smoke-intake pipe road
Center position extends obliquely, and one end of the horizontal cylinder body is located in vertical smoke-intake pipe road, and the other end is located at vertical smoke-intake pipe
Outside in road, and the one end open of the horizontal cylinder body in vertical smoke-intake pipe road, the horizontal cylinder outside vertical smoke-intake pipe road
One end of body is provided with side in ventilative through hole, the horizontal cylinder body and is provided with the first limited block and the second limited block, and the first limit
The end of the close horizontal cylinder body in vertical smoke-intake pipe road of position block,
The first piston body, second piston body, air inlet and exhaust outlet are located between the first limited block and the second limited block, and
First piston body is leaned on close to the first limited block, and the end in the horizontal cylinder body positioned at second piston body and horizontal cylinder body is provided with pressure
Contracting spring, and compression spring is located at the same side of second piston body, the automatic adjusument aerofoil and first with the second limited block
It is connected between piston body by second connecting rod, the first piston body end portion that one end of second connecting rod is hinged, the other end is hinged adaptive
The top of aerofoil should be adjusted；
When first piston body is resisted against on the first limited block：The air inlet be located at first piston body and second piston body it
Between, the part in the exhaust outlet is sealed by second piston body to be hidden；
When second piston body is resisted against on the second limited block：The air inlet and exhaust outlet are located at first piston body and second and lived
Between cock body.
2. the denitrating system applied in a kind of pulverized-coal fired boiler according to claim 1, it is characterized in that, the automatic adjusument
Aerofoil is located at the underface of corresponding ammonia shower nozzle.
3. the denitrating system applied in a kind of pulverized-coal fired boiler according to claim 1 or 2, it is characterized in that, the ammonia spray
Head is located at sustained height, and the puff prot of ammonia shower nozzle is connected with the inner chamber in vertical smoke-intake pipe road, and the import of ammonia shower nozzle, which is located at, erects
The outside of straight smoke pipeline.
4. the denitrating system applied in a kind of pulverized-coal fired boiler according to claim 1 or 2, it is characterized in that, the horizontal cylinder
Body is radially extended along vertical smoke-intake pipe road.
5. the denitrating system applied in a kind of pulverized-coal fired boiler according to claim 1 or 2, it is characterized in that, the ammonia enters
Feed channel includes the annular mozzle being set on vertical smoke-intake pipe road and the ammonia-feeding pipe road being connected with annular mozzle, described
Air inlet is connected by the first connecting tube with annular mozzle.
6. the denitrating system applied in a kind of pulverized-coal fired boiler according to claim 1 or 2, it is characterized in that, it is described tilt every
The top edge of plate is close to the upper end of flue changeable, and the lower edge of tilt clapboard is close to the lower end of flue changeable.
7. the denitrating system applied in a kind of pulverized-coal fired boiler according to claim 1 or 2, it is characterized in that, the economizer
Positioned at the top of air preheater.
8. the denitrating system applied in a kind of pulverized-coal fired boiler according to claim 1 or 2, it is characterized in that, described first turn
Change flue outlet and the second flue changeable entrance is located at the opposite sides of flue changeable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN107869726A (en) * | 2017-09-30 | 2018-04-03 | 大唐东北电力试验研究所有限公司 | Thermal generation unit denitrating flue gas remodeling method |
| CN109966812A (en) * | 2019-03-29 | 2019-07-05 | 北京国电龙源环保工程有限公司 | A kind of cement kiln end denitrating flue gas and system, the process of waste heat recycling |
| CN115006984A (en) * | 2022-06-14 | 2022-09-06 | 安徽欣创节能环保科技股份有限公司 | Convection type fixed bed desulfurization modular reactor |
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| CN103506005A (en) * | 2013-10-11 | 2014-01-15 | 东南大学 | SCR denitration device and denitration method applicable to middle and small-size boilers |
| CN103900097A (en) * | 2014-03-26 | 2014-07-02 | 东南大学 | SCR (selective catalytic reduction) denitrification modification method and SCR denitrification modification device for boilers |
| CN203916465U (en) * | 2014-06-17 | 2014-11-05 | 宁波连通设备制造有限公司 | A kind of equipment for denitrifying flue gas |
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