CN105289272B - A kind of low-temperature denitration device and the method using its denitration - Google Patents
A kind of low-temperature denitration device and the method using its denitration Download PDFInfo
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- CN105289272B CN105289272B CN201510707691.3A CN201510707691A CN105289272B CN 105289272 B CN105289272 B CN 105289272B CN 201510707691 A CN201510707691 A CN 201510707691A CN 105289272 B CN105289272 B CN 105289272B
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- spray gun
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- pulvis
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000007921 spray Substances 0.000 claims abstract description 57
- 239000003054 catalyst Substances 0.000 claims abstract description 41
- 238000006243 chemical reaction Methods 0.000 claims abstract description 39
- 239000000843 powder Substances 0.000 claims abstract description 30
- 238000003892 spreading Methods 0.000 claims abstract description 13
- 230000007480 spreading Effects 0.000 claims abstract description 13
- 238000003860 storage Methods 0.000 claims abstract description 9
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 18
- 229910021529 ammonia Inorganic materials 0.000 claims description 9
- 238000004458 analytical method Methods 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 6
- 239000000779 smoke Substances 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 5
- 229910045601 alloy Inorganic materials 0.000 claims description 5
- 239000012895 dilution Substances 0.000 claims description 4
- 238000010790 dilution Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 238000006722 reduction reaction Methods 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- 238000013461 design Methods 0.000 claims description 3
- 239000003595 mist Substances 0.000 claims description 2
- 230000003116 impacting effect Effects 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 8
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 abstract 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 11
- 239000003546 flue gas Substances 0.000 description 11
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 3
- 239000000920 calcium hydroxide Substances 0.000 description 3
- 235000011116 calcium hydroxide Nutrition 0.000 description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- WWILHZQYNPQALT-UHFFFAOYSA-N 2-methyl-2-morpholin-4-ylpropanal Chemical compound O=CC(C)(C)N1CCOCC1 WWILHZQYNPQALT-UHFFFAOYSA-N 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000004176 ammonification Methods 0.000 description 1
- BIGPRXCJEDHCLP-UHFFFAOYSA-N ammonium bisulfate Chemical compound [NH4+].OS([O-])(=O)=O BIGPRXCJEDHCLP-UHFFFAOYSA-N 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005094 computer simulation Methods 0.000 description 1
- 230000009849 deactivation Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000011859 microparticle Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 150000005837 radical ions Chemical class 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000005514 two-phase flow Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Treating Waste Gases (AREA)
Abstract
The present invention relates to a kind of low-temperature denitration device and using the method for its denitration, belong to air environmental technology field.Including powder adding device, ammonifying device, mixing arrangement and reaction unit, the powder adding device includes digester and storage arrangement, the outlet of the digester is connected with the entrance of the storage arrangement, the outlet of the storage arrangement connects spreading device by regulating valve, the spreading device includes at least one set of vaporific spray gun, the impact spray gun of one group of nozzle upwards is correspondingly arranged immediately below every group of vaporific spray gun, V-type support is set between the vaporific spray gun and impact spray gun, set between circular groove uniform board, the uniform board and connected by spring on the V-type support.Compared with prior art, using the method for device denitration of the present invention, unfavorable interference serious during catalyst operation is eliminated, the normal operation of catalyst is realized, so that the low-temperature denitration ability of denitrification apparatus is improved, the real trouble and worry for solving associated emissions enterprise.
Description
Technical field
The present invention relates to a kind of denitrification apparatus and method of denitration, and in particular to a kind of low-temperature denitration device and utilize its denitration
Method, belong to air environmental technology field.
Background technology
Electric power, including metallurgical, cement and glass industry, due to operational characteristic, its Industrial Stoves operating temperature is usually in
Below low temperature；Although some kiln associated hot combustion reactions have high temperature, only office is confined to small space；1~2 meter of flame kernel
Outer temperature drastically declines；Especially as rotary kiln high temperature section or rotating operation mode；SNCR denitration technology can be operated in
Burner hearth, but need 900 DEG C~1000 DEG C temperature sections of burner hearth and need a certain size space.
The waste gas of a large amount of nitrogen-containing oxides can be produced in production process, its concentration usually has been out the discharge standard of country,
Therefore need to carry out denitration process, the flue gas of the above-mentioned nearly all burner afterbody discharge of these industries is approximately less than 220 DEG C
Temperature；And traditional denitration reaction (SCR) needs reaction temperature 300 DEG C~420 DEG C higher interval.
A kind of current relatively advanced gas method of denitration is selective catalytic reduction denitration technology (SCR), will be contained
The waste gas of nitrogen oxides carries out mixing feeding SCR reactors with ammonia according to a certain percentage, at a certain temperature and passes through SCR
The effect of catalyst in reactor, makes nitrogen oxides with ammonia reaction generation ammonia and water, realizes the purpose of gas denitration, still
Existing denitration reaction device be mainly for the denitration of high temperature catalyst design, its temperature in use be 300 DEG C~420 DEG C even
It is higher, and the flue gas of the almost all of burner afterbody discharge of these above-mentioned industries is less than 220 DEG C, at this temperature, denitration
SO2 is oxidized to SO3 by the catalyst in reaction unit, and SO3 reacts rapidly with ammonia and produces ammonium sulfate and ammonium hydrogen sulfate, sulfuric acid
Ammonium and ammonium hydrogen sulfate can be covered in denitration reaction device at the micropore of production catalyst, cause rapid catalyst deactivation, therefore,
The research and development of low temperature section denitration technology will open huge Environmental Protection Market.
The content of the invention
Goal of the invention：For currently available technology not enough, there is provided a kind of device that can adapt to denitration under lower temperature
And utilize the method for its denitration.
Technical scheme：A kind of low-temperature denitration device, including ammonifying device, mixing arrangement and reaction unit, the ammonification dress
Put to embed and be connected in flue, the mixing arrangement and reaction unit are placed in outside flue, the outlet of the ammonifying device and institute
State the entrance connection of mixing arrangement, the outlet of the entrance of the reaction unit and the mixing arrangement；Also include being placed in cigarette
Powder adding device inside road, the outlet of the powder adding device is connected with the entrance of the mixing arrangement；The powder adding device includes
At least one set of spreading device, the spreading device includes vaporific spray gun and impact spray gun, and the vaporific spray gun is set vertically downward,
The impact spray gun is arranged at the underface of the vaporific spray gun, and the vaporific spray gun is relative with the spray outlet of impact spray gun to be set
Put, also, circular groove shape uniform board be set above the shower nozzle of the impact spray gun, the uniform board and the vaporific spray gun it
Between form uniform cavity.
Further, it is that resistance to break-in is set at one-shot forming eccentric screw structure, end nozzle inside the vaporific spray gun
Gold five ties up channel-type blade.
Further, it is that antifriction alloy three-dimensional channel is set at hollow wimble structure, end nozzle inside the impact spray gun
Formula blade.
Further, the uniform board is fixedly installed by V-type support.
Further, when the spreading device is more than 2 groups, connected between the uniform board by spring.
Further, at least provided with one layer of catalyst module in the reaction unit.
Further, the catalyst module of the reaction unit is 3 layers.
Further, the catalyst module of the reaction unit is V-Ti series ceramic homogeneous materials.
Further, the reaction unit designs for flow fieldization, its velocity vector angle<10°.
The invention also discloses a kind of method using above-mentioned low-temperature denitration device denitration, comprise the following steps：
(1) the denitration pulvis prepared by digester is by Geldart-D particle to storage arrangement, through smoke components feedback signal
The PLC control centres of afferent module, PLC control centres analysis sends signal, and commander's adjustment unit controls this module to run, entirely
Module passes through flow field analysis, under the instruction of PLC control centres, denitration pulvis is injected to powder adding device, in vaporific spray gun and punching
Hit under the collective effect of spray gun, form diffused pulvis group, when reaching the concentration of default diffused pulvis group, stop sprinkling de-
Nitre pulvis；Occur to start to spray pulvis again after changing features cause interlocking action in parameter, so go round and begin again；
(2) in the presence of dilution air, the ammonia that ammonifying device is produced reaches preset concentration, with being produced in step (1)
Raw diffused pulvis group is sufficiently mixed in mixing arrangement and sequentially enters reaction unit；
(3) in reaction unit in the presence of catalyst module, occurs denitration reduction reaction.
Beneficial effect：Compared with prior art, advantages of the present invention：Denitration pulvis is by spreading device formation diffused powder
Group, spreads in smoke space, the SO2 and SO3 in flue gas is sponged, so as to prevent sticky sulfate from being formed in catalyst surface
Shielding, eliminates unfavorable interference serious during catalyst operation, realizes the normal operation of catalyst；3 layers of catalyst module are set,
The reaction contact surface and probability of catalyst are considerably increased, the denitration efficiency of catalyst is improved, so as to improve denitrification apparatus
Low-temperature denitration ability, the real trouble and worry for solving associated emissions enterprise.
Brief description of the drawings
Fig. 1 is a kind of low-temperature denitration device of the present invention and the process chart using its denitration；
Fig. 2 is a kind of structural representation of the powder adding device of low-temperature denitration device of the present invention.
Embodiment
Technical solution of the present invention is described in detail below by accompanying drawing：
Embodiment 1：A kind of low-temperature denitration device, its structure are as shown in figure 1, including ammonifying device 2, mixing arrangement 3 and anti-
Device 4 is answered, the ammonifying device 2 is embedded to be connected in flue, and the mixing arrangement 3 and reaction unit 4 are placed in outside flue, institute
The outlet for stating ammonifying device 2 is connected with the entrance of the mixing arrangement 3, the entrance of the reaction unit 4 and the mixing arrangement 3
Outlet；Also include the powder adding device 1 being placed in inside flue, outlet and the mixing arrangement 3 of the powder adding device 1
Entrance is connected；The structure of the powder adding device 1 is as shown in Fig. 2 including at least one set of spreading device, the spreading device includes mist
Shape spray gun 6 and impact spray gun 7, the vaporific spray gun 6 are set vertically downward, and the impact spray gun 7 is arranged at the vaporific spray gun 6
Underface, the vaporific spray gun 6 and impact spray gun 7 spray outlet be oppositely arranged, also, it is described impact spray gun 7 shower nozzle
Top sets circular groove shape uniform board 9, and uniform cavity is formed between the uniform board 9 and the vaporific spray gun 6.It is described uniform
Plate 9 is stainless steel uniform board, and is fixedly installed by V-type support 8, when the spreading device is more than 2 groups, the uniform board 9
Between connected by spring 10, it is ensured that uniform board 9 is indeformable.
Complete unit is arranged for dispersiveness, and leaves other module mating interfaces.The powder adding device 1 is that absorption plant is special
Levy, it is embedded；The ammonifying device 2 is put for distribution shape dress, embedded；The mixing arrangement 3 is externally positioned type equipment, special gas
Device；The reaction unit 4 is multimode combined unit, interior insert-type.
The powder adding device 1, ammonifying device 2 are originated for the reducing agent of the reaction unit 4.In the presence of catalyst,
Former flue gas obtains denitration reduction reaction；Bad air from interference source can not produce sticky sulphur under the obstruction of calcium hydroxide pulvis
Hydrochlorate；So as to prevent shielding in catalyst surface formation, catalyst poisoning is caused；The present invention is eliminated by powder adding device 1 to be urged
Serious unfavorable interference when agent is run, realizes that catalyst is normally run, and prevents flow velocity radical ion from reacting the screen to catalyst
Cover, considerably increase catalyst reaction contact surface, improve the denitration efficiency of catalyst；So as to really improve the low of denitrification apparatus
Temperature section denitration ability.
In the present embodiment, the powder adding device 1 is rectangle high temperature resistant stainless steel device, and the perpendicular bisector in its section is perpendicular to institute
The middle part of flue is stated, through Flow Field Calculation, supporting DCS switch boards operation；Its process upstream is preparation and storage arrangement；It is external airtight
Two-phase flow fluid.The device is according to flue gas flow size, flow velocity height；Gas, fixed double phase flow spray gun special are configured after being computed；This
In embodiment, the vaporific inside of spray gun 6 is to set antifriction alloy five to tie up at one-shot forming eccentric screw structure, end nozzle to lead to
Road formula blade.The inside of impact spray gun 7 is that antifriction alloy three-dimensional channel formula blade is set at hollow wimble structure, end nozzle,
By the collective effect of vaporific spray gun 6 and impact spray gun 7, maximized powder diffused can be made to be scattered in flue.
In the present embodiment, the pulvis be slaked lime powder, its particle diameter be 5~8 μm, particle diameter is excessive, can not react in time or
Reach on the inside of honeycomb, particle diameter is too small to be gone out from " floaing " on the inside of honeycomb；Therefore, pulvis alkali material injection simpler than conventional art
Want many of science；The pulvis is special pulvis, is prepared by digester, control time, humidity are needed during storage.The pulvis is manufactured
Standard is moral mark T40/T60, and in the market is fully able to buy.Boiler emission original flue gas injects at powder adding device meets specification
Calcium hydroxide pulvis, as a kind of diffused smog.
The powder adding device 1 is additionally provided with distribution apparatus, deposition blow device and deposit retracting device, heavy for reclaiming
Product reactant.
The denitration pulvis prepared by digester extremely adds powder to fill by Geldart-D particle to storage arrangement by Geldart-D particle
Put, the PLC control centres through smoke components feedback signal afferent module, control centre's analysis sends command signal, commander's regulation
Unit control present apparatus operation；Through flow field analysis, spray gun technique is designed using special type in advance for whole module, sets equal in flue
Flow module device, vaporific spray gun 6 and the impact scientific matching of spray gun 7, Special composition scattered distribution, the science under feedback signal commander
Plus powder, and diffused powder ball is formed, smoke space is spread in, whole space does not have bubble, section alveolation, inequality to homogenize；Can
Reach the reverse side of catalyst in reaction unit；And traditional powder adding device is only simply to blow；Its effect necessarily has very big inequality
Even property, and can not reach the reverse side of catalyst.Diffused powder ball sponges the SO2 and SO3 in flue gas, so that anti-
Only sticky sulfate is shielded in catalyst surface formation, is eliminated unfavorable interference serious during catalyst operation, is realized catalyst
Normal operation.
The perpendicular bisector in section is perpendicular to the middle part of the flue described in the ammonifying device 2, and module of the invention is through flow field
Calculate, operation can far be operated by DCS.Dilution air is inside set, because ammonia is special gas, the device also has anti-riot work(concurrently
Energy；By the device, under the monitoring of instrument, preset requirement is fully achieved in ammonia, without occurring layering, point group, cutout.
The mixing arrangement 3 is arranged against device 4；Without operation after parameter preset when equipment is produced.
The reaction unit 4 is low-temperature denitration of flue gas main region, is designed using rectangle flow fieldization, and the perpendicular bisector in its section hangs down
Directly in the middle part of the flue, it is mainly characterized by concordant flow field, is calculated by flow field computer simulation, velocity vector angle<
10°；Without operation after parameter preset when equipment is produced；In the present embodiment, the catalyst module that haves three layers is set in the reaction unit 4
11, the catalyst module 11 is low temperature catalyst, using V-Ti series ceramics homogeneous material, it is necessary to customize.In device 4 tiltedly
Under the drive of air-flow technology, accordingly attach interference source microparticle occur it is secondary kick up phenomenon, and can be exited from micropore, pot
Stove original flue gas completes denitration reaction as neat stress behind the region, and delivers to following device through flow field according to technological requirement.
In addition, the predeterminable reserved layer of reaction unit 4, prevents inconvenience when boiler ultra-long time is run.
Using the method for above-mentioned low-temperature denitration device denitration, comprise the following steps：
(1) pulvis prepared by digester is incoming through smoke components feedback signal by Geldart-D particle to storage arrangement
The PLC control centres of module, PLC control centres analysis sends signal, and commander's adjustment unit controls this module to run, whole module
By flow field analysis, under the instruction of PLC control centres, denitration pulvis is injected to powder adding device 2, in vaporific spray gun 6 and impact
Under the collective effect of spray gun 7, diffused pulvis group is formed, when reaching the concentration of default diffused pulvis group, stops sprinkling de-
Nitre pulvis；Occur to start to spray pulvis again after changing features cause interlocking action in parameter, so go round and begin again；
(2) in the presence of dilution air, the ammonia that ammonifying device 2 is produced reaches preset concentration, with being produced in step (1)
Raw diffused pulvis group is sufficiently mixed in mixing arrangement 3 and sequentially enters reaction unit 4；
(3) in the presence of the catalyst module 11 of reaction unit 4, occurs denitration reduction reaction.
The absorbent that the present invention is prepared by digester spreads in flue gas empty by spreading device formation diffused powder ball
Between, the SO2 and SO3 in flue gas are sponged, so as to prevent sticky sulfate from being shielded in catalyst surface formation, catalysis is eliminated
Serious unfavorable interference, realizes the normal operation of catalyst when agent is run；3 layers of catalyst module 1 are set, catalysis is considerably increased
The reaction contact surface and probability of agent, improve the denitration efficiency of catalyst, so as to improve the low-temperature denitration ability of denitrification apparatus, very
The positive trouble and worry for solving associated emissions enterprise.
As described above, although the present invention has been represented and described with reference to specific preferred embodiment, it must not be explained
For to the limitation of itself of the invention., can be right under the premise of the spirit and scope of the present invention that appended claims are defined are not departed from
Various changes can be made in the form and details for it.
Claims (8)
1. a kind of low-temperature denitration device, including ammonifying device (2), mixing arrangement (3) and reaction unit (4), the ammonifying device
(2) embed and be connected in flue, the mixing arrangement (3) and reaction unit (4) are placed in outside flue, the ammonifying device (2)
Outlet connected with the entrance of the mixing arrangement (3), the entrance of the reaction unit (4) and going out for the mixing arrangement (3)
Mouth connection；Characterized in that, also include the powder adding device (1) that is placed in inside flue, the outlet of the powder adding device (1) with it is described
The entrance connection of mixing arrangement (3)；The powder adding device (1) includes at least one set of spreading device, and the spreading device includes mist
Shape spray gun (6) and impact spray gun (7), the vaporific spray gun (6) are set vertically downward, and the impact spray gun (7) is arranged at described
The spray outlet of the underface of vaporific spray gun (6), the vaporific spray gun (6) and impact spray gun (7) is oppositely arranged, also, described
Impact and circular groove shape uniform board (9) be set above the shower nozzle of spray gun (7), the uniform board (9) and the vaporific spray gun (6) it
Between form uniform cavity；
It is to set antifriction alloy five to tie up passage at one-shot forming eccentric screw structure, end nozzle inside the vaporific spray gun (6)
Formula blade；It is that antifriction alloy three-dimensional channel formula blade is set at hollow wimble structure, end nozzle inside the impact spray gun (7).
2. a kind of low-temperature denitration device according to claim 1, it is characterised in that the uniform board (9) passes through V-type support
(8) it is fixedly installed.
3. a kind of low-temperature denitration device according to claim 1, it is characterised in that when the spreading device is more than 2 groups,
Connected between the uniform board (9) by spring (10).
4. a kind of low-temperature denitration device according to claim 1, it is characterised in that at least set in the reaction unit (4)
There is one layer of catalyst module (11).
5. a kind of low-temperature denitration device according to claim 4, it is characterised in that the catalyst of the reaction unit (4)
Module (11) is 3 layers.
6. a kind of low-temperature denitration device according to claim 4, it is characterised in that the catalyst of the reaction unit (4)
Module (11) is V-Ti series ceramic homogeneous materials.
7. a kind of low-temperature denitration device according to claim 4, it is characterised in that the reaction unit (4) is flow field
Design, its velocity vector angle<10°.
8. utilize a kind of method of low-temperature denitration device denitration described in claim 1-7 any claims, it is characterised in that
Comprise the following steps：
(1) the denitration pulvis prepared by digester is incoming through smoke components feedback signal by Geldart-D particle to storage arrangement
The PLC control centres of module, PLC control centres analysis sends signal, and commander's adjustment unit controls this module to run, whole module
By flow field analysis, under the instruction of PLC control centres, denitration pulvis is injected to powder adding device (1), in vaporific spray gun (6) and
Under the collective effect for impacting spray gun (7), diffused pulvis group is formed, when reaching the concentration of default diffused pulvis group, is stopped
Spray denitration pulvis；Occur to start to spray pulvis again after changing features cause interlocking action in parameter, so go round and begin again；
(2) in the presence of dilution air, the ammonia that ammonifying device (2) is produced reaches preset concentration, and with being produced in step (1)
Raw diffused pulvis group is sufficiently mixed in mixing arrangement (3) and sequentially enters reaction unit (4)；
(3) in reaction unit (4) in the presence of catalyst module (11), occurs denitration reduction reaction.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510707691.3A CN105289272B (en) | 2015-10-27 | 2015-10-27 | A kind of low-temperature denitration device and the method using its denitration |
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| CN201510707691.3A CN105289272B (en) | 2015-10-27 | 2015-10-27 | A kind of low-temperature denitration device and the method using its denitration |
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| CN105289272B true CN105289272B (en) | 2017-07-28 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108854528A (en) * | 2018-08-17 | 2018-11-23 | 深圳市凯盛科技工程有限公司 | Cement industry kiln low-temperature denitration dust removal integrated plant |
| CN116768299B (en) * | 2023-08-23 | 2023-10-20 | 南京旺德福环保科技有限公司 | Sewage treatment equipment based on environment protection and control method thereof |
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| CN203678250U (en) * | 2013-12-26 | 2014-07-02 | 浙江德创环保科技股份有限公司 | Selective non-catalytic reduction (SNCR) denitration reactor provided with double-fluid spray gun |
| CN104971613B (en) * | 2015-07-24 | 2017-06-23 | 江苏揽山环境科技股份有限公司 | Denitration method for flue gas and the powder material spray gun suitable for flue-gas denitration process |
| CN205095643U (en) * | 2015-10-27 | 2016-03-23 | 江苏海澜正和环境科技有限公司 | Low temperature denitrification facility |
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