CN109999630A - A kind of SNCR denitration system - Google Patents
A kind of SNCR denitration system Download PDFInfo
- Publication number
- CN109999630A CN109999630A CN201910379873.0A CN201910379873A CN109999630A CN 109999630 A CN109999630 A CN 109999630A CN 201910379873 A CN201910379873 A CN 201910379873A CN 109999630 A CN109999630 A CN 109999630A
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- Prior art keywords
- spray gun
- denitration system
- sncr denitration
- boiler body
- reducing agent
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- 239000007921 spray Substances 0.000 claims abstract description 96
- 239000003638 chemical reducing agent Substances 0.000 claims description 45
- 238000010790 dilution Methods 0.000 claims description 16
- 239000012895 dilution Substances 0.000 claims description 16
- 238000001816 cooling Methods 0.000 claims description 13
- 238000002347 injection Methods 0.000 claims description 13
- 239000007924 injection Substances 0.000 claims description 13
- 238000009530 blood pressure measurement Methods 0.000 claims description 10
- 230000001105 regulatory effect Effects 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 239000007789 gas Substances 0.000 description 16
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 12
- 239000003546 flue gas Substances 0.000 description 12
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000003054 catalyst Substances 0.000 description 4
- 239000000411 inducer Substances 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 239000000839 emulsion Substances 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 238000010531 catalytic reduction reaction Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- DWNBOPVKNPVNQG-LURJTMIESA-N (2s)-4-hydroxy-2-(propylamino)butanoic acid Chemical compound CCCN[C@H](C(O)=O)CCO DWNBOPVKNPVNQG-LURJTMIESA-N 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 210000002700 urine Anatomy 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—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
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The present invention relates to a kind of SNCR denitration system, in particular to a kind of circulating fluidized bed boiler SNCR denitration system.A kind of SNCR denitration system, including boiler body and separator, the boiler body is connect by gas approach with separator, is additionally provided with exhaust pass on the separator, several secondary air ducts are additionally provided on the boiler body, the secondary air duct passes through elbow air hose and boiler body；Spray gun is equipped in the gas approach, in exhaust pass and in elbow air hose.Of the invention is used to solve the problems, such as not can guarantee the denitration efficiency under circulating fluidized bed boiler full load mode in the prior art, i.e., the low problem of denitration efficiency under full load mode.The present invention passes through the setting of different location, various forms of spray guns, can preferably realize the requirement of circulating fluidized bed boiler minimum discharge.
Description
Technical field
The present invention relates to a kind of SNCR denitration system, in particular to a kind of circulating fluidized bed boiler SNCR denitration system.
Background technique
Under the action of selective non-catalytic reduction (SNCR) refers to no catalyst, in " temperature window " for being suitble to denitration reaction
Nitrogen oxides in flue gas is reduced to harmless nitrogen and water by interior penetrating reducing agent.The technology generally uses spray ammonia, urine in furnace
Element or hydrogen propylhomoserin are as reducing agent reduction NOx.NOx reaction of the reducing agent only and in flue gas, does not react generally, the technology is not with oxygen
Using catalyst, it is referred to as selective non-catalytic reduction method (SNCR) in this way.Since the technique does not have to catalyst, because
Reducing agent must be added in high-temperature region in this.It is 850~1100 DEG C of region that reducing agent, which sprays into fire box temperature, rapid thermal decomposition at
NH3 reacts with the NOx in flue gas and generates N2 and water.
Circulating fluidized bed boiler is using the highest clean coal combustion technology of industrialization degree.Circulating fluidized bed boiler is adopted
With fluidized combustion, primary structure includes combustion chamber (including emulsion zone and dilute-phase zone) and circulation melts down (including high-temperature gas-solid point
From device and revert system) two large divisions." adhering to that the whole people control altogether, source prevents and treats at present, persistently implementing prevention and control of air pollution row
It is dynamic, win blue sky defended war " under the new situation, it is desirable that further it is substantially reduced PM2.5 concentration, hence it is evident that heavily contaminated number of days is reduced,
It is obviously improved atmosphere quality, hence it is evident that enhance the blue sky happiness of the people.Circulating fluidized bed boiler is also faced with minimum discharge
Tightened up requirement, circulating fluidized bed boiler mostly uses greatly low nitrogen burning+SNCR denitration mode at present, reduces NOx emission.
A kind of spray gun arragement construction (application number CN201520385787) applied to SNCR denitration system of Chinese patent, packet
Include: boiler furnace, cyclone separator, boiler furnace are connected to the cyclone separator by least two separator inducers,
Reducing agent spray gun is respectively arranged in the outer panel and upper plate of each separator inducer.Due to separator inducer flow area
Relatively narrow, reducing agent can be sufficiently mixed with flue gas here after spraying into, and the spray gun being simutaneously arranged in inducer upper plate effectively increases
The big spray penetration of reducing agent, increases area coverage, the promotion of promotion system denitration efficiency.But this Mode S NCR spray gun
Arrangement appoints right existing defects, often not can guarantee the denitration under circulating fluidized bed boiler full load mode, i.e., under full load mode
Denitration efficiency is low, and then brings the secondary pollution of huge cost and catalyst dangerous waste product to enterprise using SCR denitration technology,
Therefore it needs under existing low nitrogen+SNCR denitration mode, existing spray gun installation site is optimized, guarantee recirculating fluidized bed pot
The minimum discharge of furnace.
Summary of the invention
The purpose of the present invention is to provide a kind of SNCR denitration systems, for solving circulating fluidized bed boiler in the prior art
The low problem of denitration efficiency under full load mode.
To achieve the above object, the technical solution used in the present invention is:
A kind of SNCR denitration system, including boiler body and separator, the boiler body by gas approach with separate
Device connects, and is additionally provided with exhaust pass on the separator, several secondary air ducts, the Secondary Air are additionally provided on the boiler body
Road passes through elbow air hose and boiler body；It is characterized by: being all provided in the gas approach, in exhaust pass and in elbow air hose
There is spray gun.
Further, expansion joint is equipped in the gas approach, the spray gun is located in front of expansion joint.
Further, be equipped with several spray guns for being vertically evenly arranged Cheng Yilie in the gas approach, several spray guns be located at into
The side of mouth flue.
Further, flow angle≤60 ° of the spray gun at the gas approach, and the ejection end of the spray gun protrude into
10mm in mouth flue, the spray gun 6 tilt down 3~10 °.
Further, the spray gun in the elbow air hose and elbow air hose are coaxially arranged.
Further, several secondary air ducts are arranged circumferentially on boiler body, and are arranged up and down two layers, and upper layer is located at
Elbow air hose in be equipped with spray gun.
Further, flow angle≤90 ° of the spray gun at the elbow air hose.
Further, several spray guns, the spray gun and exhaust pass center line are symmetrically disposed in the exhaust pass
Angle≤90 °, flow angle >=60 ° of the spray gun are simultaneously≤120 °.
Further, the spray gun input terminal is connected with injection control module, and the injection control module includes for spray
Rifle is passed through the atomizing air pipeline of atomizing air, the reducing agent pipeline for being passed through reducing agent to spray gun and for being passed through to spray gun
The cooling wind pipeline of cooling wind.
Further, filter, delivery pump, check (non-return) valve, regulating valve, mixing are successively arranged along flow direction on the reducing agent pipeline
Device, flowmeter and device for pressure measurement；The dilution waterpipe for being passed through dilution water is connected on the original agent pipeline, it is described dilute
Waterpipe output end is released to connect with mixer input terminal, on the dilution waterpipe along flow direction be successively arranged filter, delivery pump,
Check (non-return) valve, regulating valve, flowmeter and device for pressure measurement.
The invention has the benefit that of the invention complete for solving not can guarantee circulating fluidized bed boiler in the prior art
Denitration efficiency problem under load condition, i.e., the low problem of denitration efficiency under full load mode.The present invention passes through different location, no
With the setting of the spray gun of form, the requirement of circulating fluidized bed boiler minimum discharge can be preferably realized.And it can solve existing
There is the NOx emission index in technology to be unable to reach the requirement of ultra-clean discharge.The present invention is by SNCR spray gun in boiler and separator
The setting of corresponding position, it is ensured that the purpose of boiler nitrogen oxides minimum discharge may be implemented in the efficiency of SNCR denitration system.
Detailed description of the invention
Fig. 1 is overall schematic of the invention.
Fig. 2 is the structural schematic diagram of injection control module in the present invention.
In figure: 1, boiler body, 2, separator, 3, gas approach, 4, expansion joint, 5, secondary air duct, 6, spray gun, 7, injection
Control module, 8, exhaust pass, 9, elbow air hose；10, atomizing air pipeline, 11, cooling wind pipeline, 12, reducing agent pipeline,
13, waterpipe, 14, ball valve, 15, pressure regulator valve, 16, device for pressure measurement, 17, flowmeter, 18, filter, 19, conveying are diluted
Pump, 20, check (non-return) valve, 21, regulating valve, 22, mixer.
Specific embodiment
For a better understanding of the present invention, technical solution of the present invention is done further below with reference to embodiment and attached drawing
Explanation.
A kind of SNCR denitration system, including boiler body 1 and separator 2, the boiler body 1 by gas approach 3 with
Separator 2 connects, and exhaust pass 8 is additionally provided on the separator 2, and the gas approach 3 is equipped with expansion joint 4；The boiler
Several secondary air ducts 5 are additionally provided on ontology 1, several secondary air ducts 5 are arranged circumferentially on boiler body 1, and upper and lower cloth
It sets two layers, the secondary air duct 5 passes through elbow air hose 9 and boiler body 1.
Five spray guns 6 for being vertically evenly arranged Cheng Yilie, five spray guns 6 are equipped in the gas approach 3 in front of expansion joint 4
Positioned at the side of gas approach 3, the spray gun 6 should be configured according to flue height and flue cross section, general adjacent two sprays
Spacing is maintained at 500~1200mm between rifle 6.Flow angle≤60 ° of spray gun 6 at this, and the ejection end of the spray gun 6 is stretched
Enter 10mm in gas approach 3 (preferably using the spray gun 6 of the big rigid jet stream of small flow), the spray gun 6 tilts down 3~10 °.By
Belong to the flared section of flue in front of expansion joint 4, and 4 rear of expansion joint belongs to the necking section that flue is connect with separator 2, will spray
Rifle 6 can then guarantee being sufficiently mixed for flue gas and reducing agent well before expansion joint 4 is arranged in.Due to stream of the flue gas in flue
Dynamic to belong to a kind of strong turbulence flowing, flow velocity is high, using be vertically evenly arranged can be realized in 4 flue cross section of expansion joint flue gas with also
Former agent is sufficiently mixed, and guarantees denitration efficiency, and in different load difference exhaust gas volumn, can pass through every 6 ammonia spraying amount of spray gun
Adjustment realizes being sufficiently mixed for reducing agent and flue gas in flue cross section, guarantees denitration efficiency.To avoid wall surface to 6 jet stream of spray gun
Injection influence, and guarantee not because the status that the presence of failure generates reducing agent dropping liquid corrosion furnace wall occurs, using by spray gun 6
Ejection end protrudes into 10mm in gas approach 3, and the mode that the spray gun 6 tilts down 3~10 ° is installed；Because of flow velocity at gas approach 3
Height, if 6 flow angle of spray gun is excessive, reducing agent can not be penetrated into the center of flue gas, so at the gas approach 3
Flow angle≤60 ° of spray gun 6 can be very good to realize that reducing agent is penetrated into the centre of flue gas and sufficiently anti-with flue gas
It reflects.
It is equipped with spray gun 6 in the elbow air hose 9 on upper layer, coaxially arranged (the i.e. spray gun 6 of the spray gun 6 and elbow air hose 9
Injection direction is consistent with the air-out direction of elbow air hose 9), flow angle≤90 ° of spray gun 6 at this, it is preferred to use small flow is small
The spray gun 6 of partial size.Because lower layer's secondary air duct 5 is typically located at the emulsion zone of boiler, and upper layer secondary air duct 5 is arranged in boiler
Dilute-phase zone, and spray gun 6 is arranged in upper layer secondary air duct 5 by emulsion zone since fuel turbulence intensity is big, can preferably be realized also
The penetrability of former agent.Since boiler setting width is wide, and the arrangement of elbow air hose 9 meets the spreadability of width direction, so adopting
It is arranged in the mode of elbow air hose 9 with spray gun 6, and spray gun 6 and elbow air hose 9 are coaxial, meets the same phasic property needs of jet stream, together
When also ensure the jet stream rigidity and penetrability needs of reducing agent.Since the spray gun 6 at elbow air hose 9 is in boiler at low load
It uses, exhaust gas volumn is small when underload, and the atomizing effect of reducing agent had both been able to achieve using the spray gun of flow angle≤90 °, can also have been protected
Card reducing agent penetrates.
Several spray guns 6, the folder of the spray gun 6 and 8 center line of exhaust pass are symmetrically disposed in the exhaust pass 8
Angle≤90 °, flow angle >=60 ° of the spray gun 6 are simultaneously≤120 °.It is preferred that the spray gun 6 of the big covering of small flow is used, due to outlet
Spray gun 6 at flue 8 is used as supplement spray gun 6, then spray gun 6 only needs good, wide coverage the spray gun using atomizing effect
6, therefore then using flow angle >=60 ° spray gun 6 simultaneously≤120 ° as supplement spray gun 6.
The principle of the present invention and application method: in boiler at low load, since temperature is difficult to reach 850 DEG C at separator 2
~1100 DEG C, and fire box temperature can satisfy the needs of SNCR denitration, in order to reduce NOx emission, boiler emission be made to reach ultralow
Emission request then needs to arrange spray gun 6 at the burner hearth in elbow air hose 9；And in boiler high load capacity, due to fire box temperature and divide
It is then led from the requirement that 2 entrance of device and outlet temperature can meet injection reducing agent simultaneously to guarantee that the reducing agent of minimum consumption uses
Reducing agent, side of the 2 exit spray gun 6 of separator as postinjection are sprayed using spray gun 6 at 2 entrance expansion joint 4 of separator
Formula, Lai Shixian flue gas and reducing agent are sufficiently mixed, the final requirement for realizing low-reductant consumption and minimum discharge.
Above-mentioned 6 input terminal of all spray guns is respectively connected with an injection control module 7, and the injection control module 7 includes being used for
The atomizing air pipeline 10 of atomizing air, the reducing agent pipeline 12 for being passed through reducing agent to spray gun 6 are passed through to spray gun 6 and are used for
The cooling wind pipeline 11 of cooling wind is passed through to spray gun 6.In order to guarantee the atomization of reducing agent and the cooling of spray gun 6, then need to spray
Rifle 6 increases atomizing air pipeline 10 and cooling wind pipeline 11.
Described 10 one end of atomizing air pipeline is connect with 6 compressed air inlet of spray gun, and the other end is passed through atomizing air；It is described
Ball valve 14, pressure regulator valve 15, device for pressure measurement 16 and ball valve 14 are successively arranged along flow direction in atomizing air pipeline 10.
Described 12 one end of reducing agent pipeline is connect with 6 reducing agent solution entrance of spray gun, and the other end is passed through reducing agent；It is described to go back
On former agent pipeline 12 along flow direction be successively arranged ball valve 14, filter 18, delivery pump 19, check (non-return) valve 20, ball valve 14, regulating valve 21,
Ball valve 14, mixer 22, flowmeter 17, ball valve 14 and device for pressure measurement 16 (device for pressure measurement 16 and dilution waterpipe
Ball valve 14 is equipped between 13)；The dilution waterpipe 13 for being passed through dilution water, the dilution are connected on the original agent pipeline 12
13 output end of waterpipe is connect with 22 input terminal of mixer, is successively arranged ball valve 14, mistake along flow direction on the dilution waterpipe 13
Filter 18, delivery pump 19, check (non-return) valve 20, ball valve 14, regulating valve 21, flowmeter 17, ball valve 14 and the (pressure of device for pressure measurement 16
Ball valve 14 is equipped between force measuring device 16 and dilution waterpipe 13).Since reducing agent consumption is small, to guarantee reducing agent technique system
The design of system needs, then needs reducing agent being diluted to a certain range, just the needs of pump valve etc. are able to satisfy, and dilute in order to guarantee
Being sufficiently mixed for water and reducing agent is released, then needs to guarantee that dilution water is uniformly mixed with reducing agent by mixer 22.
Described 11 one end of cooling wind pipeline is connect with 6 cooling air inlet of spray gun, and the other end is passed through cooling wind, the cooling wind
Pipeline 11 is equipped with ball valve 14.
The mode of flowmeter 17 is arranged to ensure the metering accuracy of reducing agent in reducing agent pipeline 12, dilution waterpipe 13.
Regulating valve 21 and device for pressure measurement 16 is arranged in reducing agent pipeline 12, dilution waterpipe 13, to meet different pots
Reducing agent demand when furnace.And the flow equilibrium to adjust each branch line and pressure balance.
Mixed reducing agent is delivered to spray gun 6, each injection control by injection control module 7 by a kind of SNCR denitration system
Molding block 7 adjusts nozzle parameter according to self-position situation respectively, is sprayed reducing agent to boiler body 1 and separation by spray gun 6
Corresponding position in device 2.
Described above is only Application Example of the invention, cannot limit the right model of the present invention with this certainly
It encloses, therefore according to equivalence changes made by scope of the present invention patent, still belongs to protection scope of the present invention.
Claims (10)
1. a kind of SNCR denitration system, including boiler body (1) and separator (2), the boiler body (1) pass through gas approach
(3) connect with separator (2), be additionally provided with exhaust pass (8) on the separator (2), the boiler body (1) if on be additionally provided with
Dry secondary air duct (5), the secondary air duct (5) pass through elbow air hose (9) and boiler body (1)；It is characterized by: the entrance
Flue (3) is interior, exhaust pass (8) is interior and elbow air hose (9) are interior is equipped with spray gun (6).
2. a kind of SNCR denitration system according to claim 1, it is characterised in that: be equipped in the gas approach (3)
Expansion joint (4), the spray gun (6) are located in front of expansion joint (4).
3. a kind of SNCR denitration system according to claim 1, it is characterised in that: be equipped in the gas approach (3) perpendicular
To several spray guns (6) for being evenly arranged Cheng Yilie, several spray guns (6) are located at the side of gas approach (3).
4. a kind of SNCR denitration system according to claim 1, it is characterised in that: the spray gun at the gas approach (3)
(6) flow angle≤60 °, and the ejection end of the spray gun (6) protrudes into gas approach (3) interior 10mm, the spray gun (6) to
Lower 3~10 ° of inclination.
5. a kind of SNCR denitration system according to claim 1, it is characterised in that: the spray gun in the elbow air hose (9)
(6) coaxially arranged with elbow air hose (9).
6. a kind of SNCR denitration system according to claim 1, it is characterised in that: several secondary air ducts (5) are circumferential uniformly
It is arranged on boiler body (1), and arranges up and down two layers, be equipped with spray gun (6) in the elbow air hose (9) on upper layer.
7. a kind of SNCR denitration system according to claim 1, it is characterised in that: the spray gun at the elbow air hose (9)
(6) flow angle≤90 °.
8. a kind of SNCR denitration system according to claim 1, it is characterised in that: uniformly right in the exhaust pass (8)
Title is disposed with several spray guns (6), and angle≤90 ° of the spray gun (6) and exhaust pass (8) center line, spray gun (6) are penetrated
Flow angle >=60 ° are simultaneously≤120 °.
9. a kind of SNCR denitration system according to claim 1, it is characterised in that: spray gun (6) input terminal is connected with
Injection control module (7), the injection control module (7) include the atomized air tube for being passed through atomizing air to spray gun (6)
Road (10), the reducing agent pipeline (12) for being passed through reducing agent to spray gun (6) and the cooling for being passed through cooling wind to spray gun (6)
Air piping (11).
10. a kind of SNCR denitration system according to claim 9, it is characterised in that: edge on the reducing agent pipeline (12)
Flow direction is successively arranged filter (18), delivery pump (19), check (non-return) valve (20), regulating valve (21), mixer (22), flowmeter (17)
With device for pressure measurement (16)；The dilution waterpipe (13) for being passed through dilution water, institute are connected on the original agent pipeline (12)
It states dilution waterpipe (13) output end to connect with mixer (22) input terminal, successively be set on the dilution waterpipe (13) along flow direction
There are filter (18), delivery pump (19), check (non-return) valve (20), regulating valve (21), flowmeter (17) and device for pressure measurement (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910379873.0A CN109999630A (en) | 2019-05-08 | 2019-05-08 | A kind of SNCR denitration system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910379873.0A CN109999630A (en) | 2019-05-08 | 2019-05-08 | A kind of SNCR denitration system |
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| CN109999630A true CN109999630A (en) | 2019-07-12 |
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ID=67176159
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910379873.0A Pending CN109999630A (en) | 2019-05-08 | 2019-05-08 | A kind of SNCR denitration system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110645584A (en) * | 2019-11-26 | 2020-01-03 | 山东中航天业科技有限公司 | Full operating mode flue gas denitration system |
| CN112791568A (en) * | 2021-01-29 | 2021-05-14 | 宁波科元精化股份有限公司 | Device and method for reducing nitrogen oxides in flue gas |
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