CN110314543A - Dirt arrangement SCR denitration device and technique in a kind of cement kiln - Google Patents
Dirt arrangement SCR denitration device and technique in a kind of cement kiln Download PDFInfo
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- CN110314543A CN110314543A CN201910712367.9A CN201910712367A CN110314543A CN 110314543 A CN110314543 A CN 110314543A CN 201910712367 A CN201910712367 A CN 201910712367A CN 110314543 A CN110314543 A CN 110314543A
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- 239000004568 cement Substances 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000003546 flue gas Substances 0.000 claims abstract description 32
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000003054 catalyst Substances 0.000 claims abstract description 28
- 239000000428 dust Substances 0.000 claims abstract description 19
- 239000002918 waste heat Substances 0.000 claims abstract description 12
- 230000003750 conditioning effect Effects 0.000 claims abstract description 11
- 239000007789 gas Substances 0.000 claims abstract description 10
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 18
- 229910021529 ammonia Inorganic materials 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 239000012716 precipitator Substances 0.000 claims description 3
- 239000000779 smoke Substances 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 2
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 14
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 239000000446 fuel Substances 0.000 description 3
- 238000010531 catalytic reduction reaction Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 235000019504 cigarettes Nutrition 0.000 description 2
- 239000002817 coal dust Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003500 flue dust Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000005619 thermoelectricity Effects 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 208000005374 Poisoning Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000000809 air pollutant Substances 0.000 description 1
- 231100001243 air pollutant Toxicity 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001723 carbon free-radicals Chemical class 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000012717 electrostatic precipitator Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000010304 firing Methods 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
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
-
- 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
-
- 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
- B01D53/90—Injecting reactants
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
-
- 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
- B01D2258/0233—Other waste gases from cement factories
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D2017/009—Cyclone for separating fines from gas
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The invention belongs to cement kiln smoke gas treatment environmental technology fields, more particularly to dirt arrangement SCR denitration device and technique in a kind of cement kiln, including rotary kiln, kiln tail exhaust treatment system and kiln hood exhaust treatment system, the kiln tail exhaust treatment system includes that five-stage cyclone preheater, SP furnace, deduster, SCR reactor, high-temperature blower, conditioning Tower/waste heat boiler, the dedusting of kiln tail bag, cave tail's releaser and kiln tail chimney, the five-stage cyclone preheater are connected to the kiln tail of the rotary kiln；Flue gas ash removal is carried out by the way that cyclone dust collectors are arranged before SCR reactor, reduce the smoke content at SCR reactor, the hole count of honeycomb catalyst can increase, and in the case where catalyst cubic number and the constant number of plies, can effectively reduce the whole height of catalyst and reactor；The pressure loss of entire reactor reduces, and can reduce the power output of rear end blower, reduces energy consumption.
Description
Technical field
The invention belongs to cement kiln smoke gas treatment environmental technology fields, and in particular to dirt arrangement in a kind of cement kiln
SCR denitration device and technique.
Background technique
In recent years, China's nitrogen oxide emission increases year by year, and quick increasing is also presented in cement industry nitrogen oxide emission
Long trend becomes the third-largest discharged nitrous oxides source after thermoelectricity and motor vehicle.Nitrogen oxide emission, which increases sharply, to be caused
A series of city and regional environment problem, after Thermal Power Generation Industry denitration works large-scale promotion, China will be promoted with cement
Other industry discharged nitrous oxides control based on industry.
In March, 2014 " cement industry atmosphere pollutants emission standards " GB4915-2013 editions comes into effect, and creates cement kiln
And kiln tail regulation atmosphere pollution NOx emission limit value is increased to 400mg/Nm3, special emission limit 320mg/Nm3.For thermoelectricity,
Steel industry, air pollution emission requirement is more and more tighter, the requirement of " ultralow " discharge has been proposed in industry and major
Implement in project.In July, 2018, " the Guanzhong area key industry Air Pollutant Emission limit value " that Shaanxi Province's provincial standard is announced
It is explicitly pointed out in exposure draft, the industrial enterprise's production facility built up after 2015 executes NOx emission limit value 260mg/
Nm3, from October 1st, 2019, all cement industries executed NOx emission limit value 150mg/Nm3, from this, cement industry
Minimum discharge is also imperative.
Since cement kiln flue gas is different from the flue gas that general coal-burning boiler generates, there is smoke components complexity and flue dust to contain
It measures the features such as high, selective non-catalytic reduction (SNCR) the removal of nitrogen oxide efficiency that cement kiln generallys use at present is on 60% left side
It is right, it is difficult to meet increasingly stringent discharge standard.SCR gas denitrifying technology is highly developed in Thermal Power Generation Industry, but cement
Industry SCR denitrating flue gas is largely also in pilot plant test, end item demonstration and accumulation test data and operating experience
Stage, also lack the experience of engineer application.To realize that qualified discharge, denitration efficiency should be not less than 90%.Certainly in conjunction with coke oven
The denitration technology route of body feature and existing maturation, need to be using mature, efficient selective catalytic reduction (SCR).
Using ammonia as the reducing agent of reaction, under the effect of the catalyst, nitrogen oxides is restored the nitrogen for generating environmental sound by ammonia
Gas and water.
The NOx generated in cement industry kiln is there are mainly three types of form, and N2 reacts the heating power type of generation with O2 under high temperature
Due to momentary type that the presence containing carbon radicals generates under fuel type NOx that fixed nitrogen in NOx, fuel generates, cold flame
NOx.Mainly (temperature is up to 1600 DEG C or more, main to produce in rotary kiln for distribution of the nitrogen oxides on cement clinker production line
Caloricity type and burning type NOx) and dore furnace in (temperature at 800 DEG C~1100 DEG C, main to generate fuel type NOx).Although kiln
The NOx generated in furnace has several forms, but is formed during improving temperature.The heating of cement kiln depends on coal dust
Burning, so the position for forming NOx in process flow is in two coal dust firing links of kiln hood and dore furnace, therefore urgently
The device and technique of NOx are removed at a kind of kiln hood in process flow of need and dore furnace.
Summary of the invention
The present invention provides dirt arrangement SCR denitration device and techniques in a kind of cement kiln, to solve above-mentioned background technique
The problem of middle proposition.
To achieve the above object, the invention provides the following technical scheme: dirt arranges SCR denitration device in a kind of cement kiln
And technique, including rotary kiln, kiln tail exhaust treatment system and kiln hood exhaust treatment system, the kiln tail exhaust treatment system include
Five-stage cyclone preheater, SP furnace, deduster, SCR reactor, high-temperature blower, conditioning Tower/waste heat boiler, the dedusting of kiln tail bag, kiln tail
Exhaust blower and kiln tail chimney, the five-stage cyclone preheater are connected to the kiln tail of the rotary kiln, the five-stage cyclone preheater
The input terminal of the deduster is connected to by the SP furnace, the deduster is used for flue gas ash removal, the deduster output
End is connected to the input terminal of the SCR reactor, and tail gas is introduced into the increasing by the high-temperature blower by the SCR reactor
In wet tower/waste heat boiler, and by after the dedusting of the kiln tail bag dedusting through the kiln tail smoke stack emission.
Preferably, porous several honeycomb catalysts are used in the SCR reactor.
Preferably, the deduster is cyclone dust collectors or electric precipitator.
Preferably, the kiln hood exhaust treatment system include kiln head cover, burner, controlled-flow grate cooler, expansion chamber,
AQC furnace, cottrell, kiln head exhaust fan and kiln hood chimney, the burner are connected to the input terminal of the kiln head cover, the combustion
Burner is connected to the kiln hood of the rotary kiln, and the controlled-flow grate cooler is connected to the output end of the kiln head cover, described
The output end of controlled-flow grate cooler is connected with the expansion chamber, and the output end of the expansion chamber is connected with the AQC furnace, and
The cottrell is connected to the output end of the AQC furnace, controlled-flow grate cooler, and the cottrell passes through the kiln hood
Exhaust blower connection is connect with the kiln hood chimney.
Dirt arranges SCR denitration process in a kind of cement kiln, comprising:
It is open from the hot air flue that five-stage cyclone preheater preheater C is exported, the flue gas that rotary kiln generates first is introduced
Deduster；
Flue gas by preliminary dust removal is re-introduced into SCR reactor, the exhaust gas volumn handled as needed in the SCR reactor
And NOXConcentration is calculated, and the catalyst of the suitable number of plies is selected；
After flue gas is mixed with ammonia, under the effect of the catalyst, ammonia is by the NO in high-temperature flue gasXIt is reduced into N2With H2O；
Treated, and flue gas is sent by high-temperature blower to conditioning Tower/waste heat boiler, is led to after eventually passing through kiln tail bag dedusting dedusting
Cross kiln tail smoke stack emission.
Preferably, common middle temperature catalyst may be selected in SCR denitration at 300~350 DEG C.
Compared with prior art, the beneficial effects of the present invention are:
1, flue gas ash removal is carried out by the way that cyclone dust collectors are arranged before SCR reactor, reduces the flue dust at SCR reactor
The hole count of content, honeycomb catalyst can increase, and in the case where catalyst cubic number and the constant number of plies, can effectively reduce and urge
The whole height of agent and reactor.
2, the pressure loss of entire reactor reduces, and can reduce the power output of rear end blower, reduces energy consumption.
3, due to reducing the dust content in a large amount of flue gases containing Ca, Mg, Al and heavy metal, catalyst is reduced in alkali gold
The catalyst poisoning risk of subordinate indirectly extends the chemical service life of catalyst.
4, Dust Capacity reduces, and under fixed wind speed, dust constaining wind declines the surface erosion intensity of catalyst, also indirectly
The physical life for extending catalyst.
Detailed description of the invention
Attached drawing is used to provide further understanding of the present invention, and constitutes part of specification, with reality of the invention
It applies example to be used to explain the present invention together, not be construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the structural schematic diagram in the present invention.
In figure: 1, rotary kiln；2, five-stage cyclone preheater；3, SP furnace；4, deduster；5, SCR reactor；6, high temperature wind
Machine；7, conditioning Tower/waste heat boiler；8, kiln tail bag dedusting；9, cave tail's releaser；10, kiln tail chimney；11, kiln head cover；12, it burns
Device；13, controlled-flow grate cooler；14, expansion chamber；15, AQC furnace；16, cottrell；17, kiln head exhaust fan；18, kiln hood cigarette
Chimney.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to FIG. 1-2, the present invention the following technical schemes are provided: in a kind of cement kiln dirt arrangement SCR denitration device and
Technique, including rotary kiln 1, kiln tail exhaust treatment system and kiln hood exhaust treatment system, kiln tail exhaust treatment system include Pyatyi
Cyclone preheater 2, SP furnace 3, deduster 4, SCR reactor 5, high-temperature blower 6, conditioning Tower/waste heat boiler 7, kiln tail bag dedusting 8,
Cave tail's releaser 9 and kiln tail chimney 10, five-stage cyclone preheater 2 are connected to the kiln tail of rotary kiln 1, and five-stage cyclone preheater 2 is logical
The input terminal that SP furnace 3 is connected to deduster 4 is crossed, deduster 4 is used for flue gas ash removal, and 4 output end of deduster is connected to SCR reaction
The input terminal of device 5, tail gas is introduced into conditioning Tower/waste heat boiler 7 by SCR reactor 5 by high-temperature blower 6, and passes through kiln tail
It is discharged after the dedusting of bag dedusting 8 through kiln tail chimney 10.
In the present embodiment, it is open from the hot air flue that 2 preheater C1 of five-stage cyclone preheater is exported, rotary kiln 1 is produced
Raw flue gas first introduces cyclone dust collectors 4, and the flue gas by preliminary dust removal enters back into SCR reactor 5, in reactor as needed
The exhaust gas volumn and NOx concentration of processing are calculated, and the catalyst of the suitable number of plies are selected, after flue gas is mixed with ammonia, in the work of catalyst
Under, the NOx in high-temperature flue gas is reduced into N by ammonia2With H2O achievees the purpose that remove NOx, and treated flue gas is by high temperature wind
Machine 6 is sent to rear end conditioning Tower/waste heat boiler 7, is discharged after eventually passing through kiln tail bag dedusting 8 by kiln tail chimney 10, cyclone dust removal
The raw material and reactor lower part ash material that device is collected send raw material conveyor system back to.
Specifically, using porous several honeycomb catalysts in SCR reactor 5, deduster 4 reduces the cigarette at SCR reactor 5
The hole count of dust content, honeycomb catalyst can increase, and in the case where catalyst cubic number and the constant number of plies, can effectively reduce
The whole height of catalyst and reactor.
Specifically, deduster 4 is cyclone dust collectors or electric precipitator, middle dirt arrangement needs to pacify before SCR reactor 5
Dress hot electrostatic precipitator removes part dust in flue gas, to reduce the dust in flue gas to the mill of catalyst in SCR reactor 5
Damage.
Specifically, kiln hood exhaust treatment system includes kiln head cover 11, burner 12, controlled-flow grate cooler 13, sedimentation
Room 14, AQC furnace 15, cottrell 16, kiln head exhaust fan 17 and kiln hood chimney 18, burner 12 are connected to the input of kiln head cover 11
End, burner 12 are connected to the kiln hood of rotary kiln 1, and controlled-flow grate cooler 13 is connected to the output end of kiln head cover 11, control
The output end of stream grate cooler 13 is connected with expansion chamber 14, and the output end of expansion chamber 14 is connected with AQC furnace 15, and cottrell
16 are connected to the output end of AQC furnace 15, controlled-flow grate cooler 13, and cottrell 16 is connected by kiln head exhaust fan 17 and kiln
Head chimney 18 connects.
Dirt arranges SCR denitration process in a kind of cement kiln, comprising: exports from 2 preheater C1 of five-stage cyclone preheater
It is open at hot air flue, the flue gas that rotary kiln 1 generates first is introduced into cyclone dust collectors；It is re-introduced by the flue gas of preliminary dust removal
SCR reactor 5, the exhaust gas volumn handled in SCR reactor 5 as needed and NOXConcentration is calculated, and the catalysis of the suitable number of plies is selected
Agent；After flue gas is mixed with ammonia, under the effect of the catalyst, ammonia is by the NO in high-temperature flue gasXIt is reduced into N2With H2O；After processing
Flue gas sent by high-temperature blower 6 to conditioning Tower/waste heat boiler 7, eventually pass through after 8 dedusting of kiln tail bag dedusting through kiln tail chimney 10
Discharge, the raw material and reactor lower part ash material that cyclone dust collectors are collected send raw material conveyor system back to.
Specifically, common middle temperature catalyst may be selected in SCR denitration at 300~350 DEG C.
Finally, it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not intended to restrict the invention,
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features.
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention
Within protection scope.
Claims (6)
1. dirt arranges SCR denitration device in a kind of cement kiln, it is characterised in that: including rotary kiln (1), kiln tail vent gas treatment system
System and kiln hood exhaust treatment system, the kiln tail exhaust treatment system includes five-stage cyclone preheater (2), SP furnace (3), deduster
(4), SCR reactor (5), high-temperature blower (6), conditioning Tower/waste heat boiler (7), kiln tail bag dedusting (8), cave tail's releaser (9) and
Kiln tail chimney (10), the five-stage cyclone preheater (2) are connected to the kiln tail of the rotary kiln (1), the five-stage whirlwind preheating
Device (2) is connected to the input terminal of the deduster (4) by the SP furnace (3), and the deduster (4) is used for flue gas ash removal,
Deduster (4) output end is connected to the input terminal of the SCR reactor (5), and the SCR reactor (5) passes through the height
Tail gas is introduced into the conditioning Tower/waste heat boiler (7) by warm blower (6), and by the dedusting of the kiln tail bag dedusting (8) after
It is discharged through the kiln tail chimney (10).
2. dirt arranges SCR denitration device in a kind of cement kiln according to claim 1, it is characterised in that: the SCR is anti-
It answers and uses porous several honeycomb catalysts in device (5).
3. dirt arranges SCR denitration device in a kind of cement kiln according to claim 1, it is characterised in that: the dedusting
Device (4) is cyclone dust collectors or electric precipitator.
4. dirt arranges SCR denitration device in a kind of cement kiln according to claim 1, it is characterised in that: the kiln hood
Exhaust treatment system includes kiln head cover (11), burner (12), controlled-flow grate cooler (13), expansion chamber (14), AQC furnace
(15), cottrell (16), kiln head exhaust fan (17) and kiln hood chimney (18), the burner (12) are connected to the kiln head cover
(11) input terminal, the burner (12) are connected to the kiln hood of the rotary kiln (1), the controlled-flow grate cooler (13)
It is connected to the output end of the kiln head cover (11), the output end of the controlled-flow grate cooler (13) is connected with the expansion chamber
(14), the output end of the expansion chamber (14) is connected with the AQC furnace (15), and the cottrell (16) be connected to it is described
The output end of AQC furnace (15), controlled-flow grate cooler (13), the cottrell (16) pass through the kiln head exhaust fan (17)
Connection is connect with the kiln hood chimney (18).
5. dirt arranges SCR denitration process in a kind of cement kiln, it is characterised in that: include:
It is open from the hot air flue that five-stage cyclone preheater (2) preheater C1 is exported, the flue gas that rotary kiln (1) generates first is drawn
Enter deduster (4)；
Flue gas by preliminary dust removal is re-introduced into SCR reactor (5), the flue gas handled as needed in the SCR reactor (5)
Amount and NOXConcentration is calculated, and the catalyst of the suitable number of plies is selected；
After flue gas is mixed with ammonia, under the effect of the catalyst, ammonia is by the NO in high-temperature flue gasXIt is reduced into N2With H2O；
Treated, and flue gas is sent by high-temperature blower (6) to conditioning Tower/waste heat boiler (7), eventually passes through the dedusting of kiln tail bag (8) dedusting
It is discharged afterwards by kiln tail chimney (10).
6. dirt arranges SCR denitration process in a kind of cement kiln according to claim 5, it is characterised in that: SCR denitration is urged
Common middle temperature catalyst may be selected in agent at 300~350 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910712367.9A CN110314543A (en) | 2019-08-02 | 2019-08-02 | Dirt arrangement SCR denitration device and technique in a kind of cement kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910712367.9A CN110314543A (en) | 2019-08-02 | 2019-08-02 | Dirt arrangement SCR denitration device and technique in a kind of cement kiln |
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| Publication Number | Publication Date |
|---|---|
| CN110314543A true CN110314543A (en) | 2019-10-11 |
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| CN201910712367.9A Pending CN110314543A (en) | 2019-08-02 | 2019-08-02 | Dirt arrangement SCR denitration device and technique in a kind of cement kiln |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111551038A (en) * | 2020-05-14 | 2020-08-18 | 中国科学院过程工程研究所 | Medium-temperature SCR denitration system and medium-temperature SCR denitration method for kiln tail flue gas |
| CN112179156A (en) * | 2020-09-30 | 2021-01-05 | 大连九五高科新能源发展有限公司 | Bypass air-bleeding energy-saving emission-reduction utilization system and process for cooperatively treating waste in cement kiln |
| CN112212702A (en) * | 2020-09-30 | 2021-01-12 | 大连九五高科新能源发展有限公司 | Cement kiln bypass air-bleeding energy-saving emission-reduction comprehensive utilization system and process |
| CN113217935A (en) * | 2021-05-20 | 2021-08-06 | 南阳中联水泥有限公司 | Tail gas treatment system of recycling for cement manufacture |
| CN113247909A (en) * | 2021-05-17 | 2021-08-13 | 李朝侠 | Process for recycling red mud by rotary kiln method and rotary kiln |
| CN113578045A (en) * | 2021-08-18 | 2021-11-02 | 中航超能(北京)科技有限公司 | Dust removal and denitration treatment process for cement kiln tail flue gas |
| CN114279212A (en) * | 2021-12-27 | 2022-04-05 | 天津金隅振兴环保科技有限公司 | Quenching process for large-scale treatment of waste flue gas by using rotary cement kiln |
| CN114413642A (en) * | 2022-03-01 | 2022-04-29 | 思安新能源股份有限公司 | Cement kiln waste heat utilization system based on high-temperature SCR device |
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| CN111551038A (en) * | 2020-05-14 | 2020-08-18 | 中国科学院过程工程研究所 | Medium-temperature SCR denitration system and medium-temperature SCR denitration method for kiln tail flue gas |
| CN112179156A (en) * | 2020-09-30 | 2021-01-05 | 大连九五高科新能源发展有限公司 | Bypass air-bleeding energy-saving emission-reduction utilization system and process for cooperatively treating waste in cement kiln |
| CN112212702A (en) * | 2020-09-30 | 2021-01-12 | 大连九五高科新能源发展有限公司 | Cement kiln bypass air-bleeding energy-saving emission-reduction comprehensive utilization system and process |
| CN113247909A (en) * | 2021-05-17 | 2021-08-13 | 李朝侠 | Process for recycling red mud by rotary kiln method and rotary kiln |
| CN113217935A (en) * | 2021-05-20 | 2021-08-06 | 南阳中联水泥有限公司 | Tail gas treatment system of recycling for cement manufacture |
| CN113578045A (en) * | 2021-08-18 | 2021-11-02 | 中航超能(北京)科技有限公司 | Dust removal and denitration treatment process for cement kiln tail flue gas |
| CN114279212A (en) * | 2021-12-27 | 2022-04-05 | 天津金隅振兴环保科技有限公司 | Quenching process for large-scale treatment of waste flue gas by using rotary cement kiln |
| CN114279212B (en) * | 2021-12-27 | 2024-07-12 | 天津金隅振兴环保科技有限公司 | Quenching process for treating waste smoke in large scale by using cement rotary kiln |
| CN114413642A (en) * | 2022-03-01 | 2022-04-29 | 思安新能源股份有限公司 | Cement kiln waste heat utilization system based on high-temperature SCR device |
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