CN107626202A - A kind of SCR denitration device, the method and its application of aluminium oxide calcining flue gas - Google Patents
A kind of SCR denitration device, the method and its application of aluminium oxide calcining flue gas Download PDFInfo
- Publication number
- CN107626202A CN107626202A CN201711078478.6A CN201711078478A CN107626202A CN 107626202 A CN107626202 A CN 107626202A CN 201711078478 A CN201711078478 A CN 201711078478A CN 107626202 A CN107626202 A CN 107626202A
- Authority
- CN
- China
- Prior art keywords
- flue gas
- guard board
- electric guard
- aluminium oxide
- flue
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Catalysts (AREA)
- Electrostatic Separation (AREA)
Abstract
The present invention relates to a kind of SCR denitration device, the method and its application of aluminium oxide calcining flue gas.The secondary cyclone that described device includes being sequentially connected is exported to flue, hot electrostatic precipitator and SCR denitration reactor between wet hydrogen aluminum oxide entrance.Flue gas outlet is disposed with flue and flue gas leads back mouth；Install No.1 electric guard board door in it additional.No. two electric guard board doors and emergent coolant entrance are set gradually between flue gas outlet and hot electrostatic precipitator.SCR denitration reactor and flue gas set No. three electric guard board doors between leading back mouth.No.1, No. two, No. three electric guard board doors, emergent coolant entrance the automatic switchover of each electric guard board door and the penetrating or stopping of cooling agent are realized by flue-gas temperature test system.This device denitration efficiency can meet increasingly strict aluminium oxide calcining flue gas NOxDischarge standard, can tackle the high temperature impact under aluminium oxide calcining production system non-normal condition, have stronger applicability to aluminium oxide calcining flue gas.
Description
Technical field
The present invention relates to Pollutant Control Technology field, more particularly to a kind of SCR denitration device of aluminium oxide calcining flue gas,
Method and its application.
Background technology
Nitrogen oxides (NOx) it is a kind of important atmosphere pollution, it can form acid rain, can also be organic with volatility
Thing issues third contact of a total solar or lunar eclipse chemical reaction in illumination condition, generates ozone and PM2.5.In recent years, it is gradual with fossil energy consumption amount
Increase, the atmosphere pollutants emission standardses of every profession and trade it is increasingly severe, denitrating flue gas Treatment process demand is urgent.
Aluminum smelting technology industry occupies main status in the national economy and social development in China, but during aluminum smelting technology,
Especially aluminium oxide calcining process, NOxIt is larger to discharge intensity.China's alumina producing generally uses circulating fluidized roaster,
In roasting process, substantial amounts of coal gas need to be consumed, temperature is up to 900-1100 DEG C or so, while generates substantial amounts of NOx, its concentration height
Up to 500mg/m3Left and right, it is far above《Aluminum i ndustry pollutant emission standard》Middle 100mg/m3Special emission limit.In May, 2017
The issue of part Chinese Ministry of Environmental Protection《The bulletin that the special emission limit of atmosphere pollution is performed on Jing-jin-ji region and surrounding area (consults on
Original text)》In clearly propose, multiple industries including coloured in Jing-jin-ji region propagation in atmosphere passage city are newly-built and existing enterprise holds
The special emission limit of row atmosphere pollution, and aluminum smelting technology industry be included in coloured industry within, and standard perform from Jing-jin-ji region to
The trend that the whole nation is promoted is extremely urgent.Therefore, it is necessary to using appropriate method to the NO in aluminium oxide calcining flue gasxIt is discharged into
Row is efficiently administered.
Current gas denitrifying technology mainly includes SNCR method (SNCR) and selective catalytic reduction
(SCR).SNCR technologies are that ammonia or urea are sprayed into flue gas in high temperature section (900-1100 DEG C), by NOxIt is reduced to N2.But SNCR
Denitration efficiency it is relatively low, generally below 50%, and the escaping of ammonia easily be present.
CN106215652A discloses the combination denitrating system and method for a kind of aluminium oxide calcining flue gas, the aluminum oxide roasting
Burn flue gas combination denitrating system, along flow of flue gas direction, including be sequentially connected by exhaust gases passes roasting kiln, three-level rotation
Wind separator, secondary cyclone, primary cyclone and end deduster, described secondary cyclone and one-level
Moor dry materials import is provided between cyclone separator, it is described between three-stage cyclone separator and secondary cyclone
Provided with half-dried raw material dry import, between described roasting kiln and three-stage cyclone separator provided with dry raw material dry into
Mouthful, the gaseous mixture for including ammonia and alcohol type organic for being passed through is additionally provided between roasting kiln and dry raw material dry import
First purified gas entrance of body, be additionally provided with to be passed through ozone between primary cyclone and end deduster second are net
Change gas entrance.Described combination method of denitration comprises the following steps：(1) from the first purified gas entrance toward roasting kiln exit
The mixed gas comprising the ammoniacal liquor after gasification with alcohol type organic is added in high temperature section flue, to remove the part nitrogen oxygen in flue gas
Compound；(2) ozone is added in from the second purified gas entrance toward low-temperature zone flue, the remaining nitrogen oxides in flue gas is further turned
Turn to NO2；(3) moor material enters in flue from the import of moor dry materials, through flue gas drying, is changed into half-dried raw material successively
With dry raw material, during moor dry materials, to the NO in flue gas2Absorption is synchronized, realizes secondary denitration.But
It is that the combination denitrating system and method for the aluminium oxide calcining flue gas also have following deficiency：Alcohol type organic SNCR effects one
As, alkalescence is weaker in itself for aluminium material in system, to NO2Absorption also has certain limitation.
The content of the invention
In view of problems of the prior art, an object of the present invention is to provide a kind of aluminium oxide calcining flue gas
SCR denitration device and method, the SCR denitration device and method denitration efficiency of the aluminium oxide calcining flue gas are high.
To be adopted the following technical scheme that up to this purpose, the present invention：
In a first aspect, the present invention provides a kind of SCR denitration device of aluminium oxide calcining flue gas, including the two level being sequentially connected
Cyclone outlet is to the flue between wet hydrogen aluminum oxide entrance, hot electrostatic precipitator and SCR denitration reactor.
Flue gas outlet is disposed with along aluminium oxide calcining flow of flue gas direction and flue gas leads back mouth on the flue；Institute
State and install No.1 electric guard board door in flue additional.
Between the flue gas outlet and the hot electrostatic precipitator, along the flow direction of aluminium oxide calcining flue gas, successively
No. two electric guard board doors and emergent coolant entrance are set.
Between the SCR denitration reactor and the flue gas lead back mouth, No. three electric guard board doors are set.
The No.1 electric guard board door, No. two electric guard board doors, No. three electric guard board doors, the emergent cooling
Agent entrance realizes the automatic switchover of each electric guard board door and the penetrating of cooling agent by flue-gas temperature test system or stops spraying into.
The flue-gas temperature test system causes：In the case of flue gas working condition is normal, the No.1 electric guard board door, which is in, to close
Closed state, No. two electric guard board doors and No. three electric guard board doors are in open mode；Given birth in flue gas aluminium oxide calcining
When high temperature impact occurs for production system, the No.1 electric guard board door is in open mode, No. two electric guard board doors and described
No. three electric guard board doors are closed, while are sprayed into cooling agent to bypass flue temperature by the emergent coolant entrance and be
After less than 350 DEG C, the emergent coolant entrance stops spraying into cooling agent.
SCR denitration technology is in the presence of catalyst, using ammonia or other reducing agents in catalyst surface by NOxAlso
Originally it was N2, realize denitrating flue gas.Under the conditions of control preferably, generally up to more than 85%, its temperature section is SCR denitration efficiency
300~400 DEG C.In the circulating fluidized roasting technique of production aluminum oxide, baking flue gas is in secondary cyclone to hydroxide
Between aluminium injection point in flue, flue-gas temperature is more coincide at 300~350 DEG C or so, with SCR reaction temperatures section.But
The content of alumina particle thing is up to 35g/m in aluminium oxide calcining flue gas3Left and right, catalyst can be covered in after a period of time operation
Surface, so as to influence SCR denitration efficiency.In addition, that aluminium oxide calcining production system aluminium feeding is unusual, gas supply is out of control etc. is non-
Under normal condition, it may occur that 500~600 DEG C or so of high temperature impact of contingency, also make sintering of catalyst, cause permanently to lose
It is living.
Device of the present invention realizes the automatic of baffle door by the linkage of electric guard board door and flue-gas temperature test system
The emergent setting of switching, the electric guard board door can tackle the high temperature under aluminium oxide calcining production system contingency non-normal condition
Impact, during high temperature impact of the emergent coolant entrance under aluminium oxide calcining production system contingency non-normal condition pair
Flow is cooled in SCR denitration device, so as to prevent sintering of catalyst from inactivating.Therefore, the SCR of the aluminium oxide calcining flue gas
Denitrification apparatus can tackle the high temperature impact under aluminium oxide calcining production system contingency non-normal condition, to aluminium oxide calcining flue gas
With stronger applicability.
The high temperature impact under aluminium oxide calcining production system contingency non-normal condition can be tackled, to aluminium oxide calcining flue gas
With stronger applicability.
Heretofore described hot electrostatic precipitator can realize the removing of alumina particle thing in flue gas, so as to reduce in flue gas
Influence of the particulate matter to catalyst.The SCR denitration device and method denitration efficiency of the aluminium oxide calcining flue gas are higher, can reduce
The overlay capacity of catalyst surface aluminium species, so as to extend the service life of catalyst.
Preferably, between the SCR denitration reactor and the flue gas lead back mouth, along the flowing side of aluminium oxide calcining flue gas
To setting gradually feedback outlet and No. three electric guard board doors.
Preferably, deduster separation hopper is provided with below the hot electrostatic precipitator.
Preferably, the deduster separation hopper is connected with the feedback outlet.
Preferably, deflector, spray ammonia nozzle and catalyst are sequentially provided with the SCR denitration reactor from top to bottom.
Second aspect, the present invention provides a kind of method that denitration is carried out using device as described in relation to the first aspect, when flue gas work
When condition condition is normal, the No.1 electric guard board door is closed, No. two electric guard board doors and it is described No. three it is electronic
Baffle door is in open mode；Methods described comprises the following steps：
1) aluminium oxide calcining flue gas flue gas passes through after hot electrostatic precipitator, removes the alumina particle thing in flue gas；
2) flue gas enters SCR denitration reactor after dedusting, NO in flue gasxWith NH3SCR occurs under catalyst effect
Denitration reaction is converted into N2, it is purified rear flue gas；
3) flue gas leads back a mouthful returning alumina roasting production system through flue gas after the purification.
When high temperature impact occurs for flue gas aluminium oxide calcining production system, the No.1 electric guard board door is in open shape
State, No. two electric guard board doors and No. three electric guard board doors are closed, while are entered by the emergent cooling agent
After mouth penetrating cooling agent to bypass flue temperature is less than 350 DEG C, the emergent coolant entrance stops spraying into cooling agent.
Preferably, the step 1) hot electrostatic precipitator uses an electric field, two electric fields or three electric fields.
Preferably, NH described in step 2)3In ammoniacal liquor, urea or liquefied ammonia any one or at least two group
Close, wherein, it is typical but non-limiting to be combined as：The combination of the combination of ammoniacal liquor and urea, ammoniacal liquor and liquefied ammonia, urea and liquefied ammonia
Combination, the combination of ammoniacal liquor, urea and liquefied ammonia.
Preferably, the step 2) NH3With NO in flue gasxMol ratio be (0.5~1.2): 1, such as 0.5: 1,0.6: 1,
0.8: 1,0.9: 1,1.0: 1,1.1: 1 or 1.2: 1 etc..
Preferably, the temperature of step 2) SCR denitration reaction is 300~350 DEG C, for example, 300 DEG C, 310 DEG C, 320 DEG C,
330 DEG C, 340 DEG C or 350 DEG C etc..
Preferably, the step 2) catalyst is vanadium tungsten titanium honeycomb and/or vanadium tungsten titanium plate formula catalyst.
Preferably, step 1) the alumina particle thing enters deduster separation hopper, then is entered by feedback outlet and purified
Flue gas afterwards.
As currently preferred technical scheme, the method for denitration includes：
When flue gas working condition is normal, the No.1 electric guard board door is closed, No. two electric guard boards
Door and No. three electric guard board doors are in open mode；Methods described comprises the following steps：
1) aluminium oxide calcining flue gas flue gas passes through after hot electrostatic precipitator, removes the alumina particle thing in flue gas；Institute
Alumina particle thing is stated into deduster separation hopper, then passes through flue gas after feedback outlet entrance purification；
2) flue gas enters SCR denitration reactor after dedusting, NO in flue gasxWith NH3In vanadium tungsten titanium honeycomb and/or vanadium tungsten titanium plate
SCR denitration reaction occurs in 300~350 DEG C under the catalytic action of formula catalyst and is converted into N2, it is purified rear flue gas；The NH3
In ammoniacal liquor, urea or liquefied ammonia any one or at least two combination；The NH3With NO in flue gasxMol ratio be
(0.5~1.2): 1；
3) the alumina particle thing enters deduster separation hopper, then passes through flue gas after feedback outlet entrance purification；
4) flue gas leads back a mouthful returning alumina roasting production system through flue gas after the purification；
When high temperature impact occurs for flue gas aluminium oxide calcining production system, the No.1 electric guard board door is in open shape
State, No. two electric guard board doors and No. three electric guard board doors are closed, while are entered by the emergent cooling agent
After mouth penetrating cooling agent to bypass flue temperature is less than 350 DEG C, the emergent coolant entrance stops spraying into cooling agent.
The third aspect, the present invention provide application of the device in aluminium oxide calcining denitrating flue gas as described in relation to the first aspect.
Number range of the present invention not only includes the above-mentioned point value enumerated, in addition to the above-mentioned numerical value not included
Arbitrary point value between scope, as space is limited and the consideration for simplicity, no longer scope described in exclusive list of the invention include
Specific point value.
Compared with prior art, the present invention at least has the advantages that：
1. the SCR denitration device and method of denitration denitration efficiency of aluminium oxide calcining flue gas provided by the invention disclosure satisfy that day
Gradually strict aluminium oxide calcining flue gas NOxDischarge standard, it can also tackle aluminium oxide calcining production system contingency non-normal condition
Under high temperature impact, there is stronger applicability to aluminium oxide calcining flue gas；
2. heretofore described hot electrostatic precipitator can realize the removing of alumina particle thing in flue gas, so as to reduce flue gas
Influence of the middle particulate matter to catalyst.The SCR denitration device and method denitration efficiency of the aluminium oxide calcining flue gas are relatively up to
More than 90%, and denitration efficiency is hardly influenceed by high temperature impact, and it can reduce the overlay capacity of catalyst surface aluminium species,
So as to extend the service life of catalyst.
Brief description of the drawings
Fig. 1 is the SCR denitration device schematic diagram of aluminium oxide calcining flue gas in the embodiment of the present invention 1
Mark is illustrated as in figure：1- secondary cyclones are exported to the flue between wet hydrogen aluminum oxide entrance；2- No.1s
Electric guard board door；3- flue gas outlets；No. bis- electric guard board doors of 4-；5- meets an urgent need coolant entrance；6- hot electrostatic precipitators；7- is removed
Dirt device separates hopper；8-- deflectors；9- sprays ammonia nozzle；10-SCR Benitration reactors；11- catalyst；12- feedback outlets；13- tri-
Number electric guard board door；14- flue gases lead back mouth
Embodiment
Further illustrate technical scheme below in conjunction with the accompanying drawings and by embodiment.But following reality
The simple example that example is only the present invention is applied, does not represent or limit the scope of the present invention, protection model of the invention
Enclose and be defined by claims.
Embodiment 1
A kind of SCR denitration device of aluminium oxide calcining flue gas, including be sequentially connected be exported to wet hydrogen aluminum oxide entrance it
Between flue 1, hot electrostatic precipitator 6 and SCR denitration reactor 10, before the secondary cyclone to wet hydrogen aluminum oxide entrance
Install No.1 electric guard board door 2 in flue 1 additional, the top of the No.1 electric guard board door 2 is provided with flue gas outlet 3, the flue gas
Between outlet 3 and hot electrostatic precipitator 6 along the flow direction of aluminium oxide calcining flue gas set gradually No. two electric guard board doors 4 and
Emergent coolant entrance 5, the lower section of hot electrostatic precipitator 6 are provided with deduster separation hopper 7, and the deduster separates hopper 7
It is connected with feedback outlet 12, the feedback outlet 12 is located at after SCR denitration reactor 10, by upper in the SCR denitration reactor 10
Deflector 8, spray ammonia nozzle 9 and catalyst 11 are sequentially provided with, the feedback outlet 12 is afterwards along the stream of aluminium oxide calcining flue gas
Dynamic direction sets gradually No. three electric guard board doors 13 and flue gas leads back mouth 14.
Surveyed by electric guard board door 2, electric guard board door 4, electric guard board door 13 and emergent coolant entrance 5 and flue-gas temperature
The linkage of test system, realize the emergent setting of the automatic switchover of baffle door and penetrating/stopping of cooling agent.In flue gas working condition
In the case of normal, No.1 electric guard board door 2 is closed, at No. two electric guard board doors 4 and No. three electric guard board doors 13
In open mode；Under high temperature impact under flue gas aluminium oxide calcining production system contingency non-normal condition, No.1 electric gear
Plate door 2 is in open mode, and No. two electric guard board doors 4 and No. three electric guard board doors 13 are closed, while by answering chilling
But agent entrance 5 sprays into cooling agent to bypass flue temperature to less than 350 DEG C, then stops spraying into cooling agent.
Using the method for denitration of said apparatus, comprise the following steps：
1) initial flue gas passes through after hot electrostatic precipitator 6, removes the alumina particle thing in flue gas；
2) flue gas enters SCR denitration reactor 10 after dedusting, NO in flue gasxWith NH3Converted under the catalytic action of catalyst 11
For N2；
3) alumina material passes through flue gas after the entrance purification of feedback outlet 12.
4) flue gas leads back the returning alumina roasting production system of mouth 14 through flue gas after purifying.
Step 1) high temperature electric cleaner 6 uses an electric field.
NH in step 2)3From ammoniacal liquor.
Step 2) NH3With NO in flue gasxMol ratio be 1: 1.
The reaction of step 2) SCR denitration is carried out under the conditions of 350 DEG C.
The catalyst 11 that the reaction of step 2) SCR denitration uses is vanadium tungsten titanium honeycomb catalyst.
When high temperature impact occurs for flue gas aluminium oxide calcining production system, flue-gas temperature test system emergency, No.1
Electric guard board door 2 is in open mode, and No. two electric guard board doors 4 and No. three electric guard board doors 13 are closed, while by
After the emergent penetrating cooling agent of coolant entrance 5 is less than 350 DEG C to bypass flue temperature, coolant entrance 5 of meeting an urgent need stops spraying into
Cooling agent.
Embodiment 2
Device is same as Example 1, unlike：Step 1) high temperature electric cleaner 6 uses two electric fields.In step 2)
NH3From urea.Step 2) NH3With NO in flue gasxMol ratio be 0.5: 1.Step 2) SCR denitration is reacted in 300 DEG C of conditions
Lower progress.The catalyst 11 that the reaction of step 2) SCR denitration uses is vanadium tungsten titanium plate formula catalyst.
Embodiment 3
Device is same as Example 1, unlike：Step 1) high temperature electric cleaner 6 uses three electric fields.In step 2)
NH3From liquefied ammonia.Step 2) NH3With NO in flue gasxMol ratio be 1.2: 1.Step 2) SCR denitration is reacted in 330 DEG C of conditions
Lower progress.The catalyst 11 that the reaction of step 2) SCR denitration uses is vanadium tungsten titanium plate formula catalyst.
Comparative example 1
With differing only in for embodiment 1：Save all electric guard board doors and emergent coolant entrance and flue-gas temperature
Test system.
Comparative example 2
With differing only in for embodiment 1：Save the hot electrostatic precipitator 6.
Exemplarily, the aluminium oxide calcining using the device described in embodiment 1, comparative example 1, comparative example 2 to certain factory
Flue gas carries out denitration purification：
Exhaust gas volumn is 100000m3/ h, NOxConcentration is 500mg/m3,
Test the NO of purifying smoke under normal circumstancesxConcentration, embodiment 1, comparative example 1, contrast after manufacture high temperature impact 1 time
The NO of purifying smoke obtained by device described in example 2xConcentration, add up using 3 months, 6 months, the NO of 1 year after-purification flue gasxConcentration,
Test result is as shown in table 1.Embodiment 2~3 is similar with the result of embodiment 1, repeats no more.
Table 1
As it can be seen from table 1 with the increase of device usage time, under the denitration efficiency of comparative example 1 and comparative example 2 is obvious
Drop, on the one hand, if dispensed with hot electrostatic precipitator, particulate matter is then covered in catalyst surface in flue gas, reduces catalyst
Activity and service life, on the other hand, surveyed if dispensed with all electric guard board doors and emergent coolant entrance and flue-gas temperature
Test system, denitrification apparatus can not tackle the high temperature impact under aluminium oxide calcining production system contingency non-normal condition, to oxidation
Aluminium baking flue gas it is poor for applicability, it is necessary to carry out stopping production and re-replace catalyst, otherwise denitration efficiency can not show a candle to apparatus of the present invention.
Applicant states that the present invention illustrates the detailed process equipment of the present invention and technological process by above-described embodiment,
But the invention is not limited in above-mentioned detailed process equipment and technological process, that is, it is above-mentioned detailed not mean that the present invention has to rely on
Process equipment and technological process could be implemented.Person of ordinary skill in the field it will be clearly understood that any improvement in the present invention,
The addition of equivalence replacement and auxiliary element to each raw material of product of the present invention, selection of concrete mode etc., all fall within the present invention's
Within the scope of protection domain and disclosure.
Claims (10)
1. a kind of SCR denitration device of aluminium oxide calcining flue gas, it is characterised in that including the secondary cyclone being sequentially connected
Flue (1), hot electrostatic precipitator (6) and the SCR denitration reactor (10) being exported between wet hydrogen aluminum oxide entrance；
Flue gas outlet (3) is disposed with along aluminium oxide calcining flow of flue gas direction and flue gas leads back mouth on the flue (1)
(14)；Install No.1 electric guard board door (2) in the flue (1) additional；
Between the flue gas outlet (3) and the hot electrostatic precipitator (6), along the flow direction of aluminium oxide calcining flue gas, according to
No. two electric guard board doors (4) of secondary setting and emergent coolant entrance (5)；
The SCR denitration reactor (10) and the flue gas set No. three electric guard board doors (13) between leading back mouth (14)；
The No.1 electric guard board door (2), No. two electric guard board doors (4), No. three electric guard board doors (13), it is described should
Anxious coolant entrance (5) by flue-gas temperature test system realize the automatic switchover of each electric guard board door and the penetrating of cooling agent or
Stop spraying into.The flue-gas temperature test system causes：In the case of flue gas working condition is normal, the No.1 electric guard board
Door (2) is closed, and No. two electric guard board doors (4) and No. three electric guard board doors (13) are in open mode；
When high temperature impact occurs for flue gas aluminium oxide calcining production system, the No.1 electric guard board door (2) is in open mode, described
No. two electric guard board doors (4) and No. three electric guard board doors (13) are closed, while are entered by the emergent cooling agent
After mouth (5) penetrating cooling agent to bypass flue temperature is less than 350 DEG C, the emergent coolant entrance (5), which stops spraying into, to be cooled down
Agent.
2. device as claimed in claim 1, it is characterised in that the SCR denitration reactor (10) leads back mouth with the flue gas
(14) between, along the flow direction of aluminium oxide calcining flue gas, feedback outlet (12) and No. three electric guard board doors are set gradually
(13)。
3. device as claimed in claim 1 or 2, it is characterised in that provided with deduster point below the hot electrostatic precipitator (6)
From hopper (7)；
Preferably, the deduster separation hopper (7) is connected with the feedback outlet (12).
4. the device as described in any one of claims 1 to 3, it is characterised in that arrived in the SCR denitration reactor (10) from above
Under be sequentially provided with deflector (8), spray ammonia nozzle (9) and catalyst (11).
A kind of 5. method that denitration is carried out using any one of Claims 1 to 44 described device, it is characterised in that when flue gas operating mode
When condition is normal, the No.1 electric guard board door (2) is closed, No. two electric guard board doors (4) and described No. three
Electric guard board door (13) is in open mode；Methods described comprises the following steps：
1) aluminium oxide calcining flue gas flue gas passes through after hot electrostatic precipitator (6), removes the alumina particle thing in flue gas；
2) flue gas enters SCR denitration reactor (10) after dedusting, NO in flue gasxWith NH3Occur under catalyst (11) catalytic action
SCR denitration reaction is converted into N2, it is purified rear flue gas；
3) flue gas leads back mouth (14) returning alumina roasting production system through flue gas after the purification；
When high temperature impact occurs for flue gas aluminium oxide calcining production system, the No.1 electric guard board door (2) is in open mode,
No. two electric guard board doors (4) and No. three electric guard board doors (13) are closed, while by the emergent cooling
After agent entrance (5) penetrating cooling agent to bypass flue temperature is less than 350 DEG C, the emergent coolant entrance (5) stops spraying into
Cooling agent.
6. according to the method for claim 5, it is characterised in that the step 1) hot electrostatic precipitator is using an electric field, two
Electric field or three electric fields.
7. the method according to claim 5 or 6, it is characterised in that NH described in step 2)3From ammoniacal liquor, urea or liquid
In ammonia any one or at least two combination；
Preferably, the step 2) NH3With NO in flue gasxMol ratio be (0.5~1.2):1；
Preferably, the temperature of step 2) the SCR denitration reaction is 300~350 DEG C；
Preferably, the step 2) catalyst is vanadium tungsten titanium honeycomb and/or vanadium tungsten titanium plate formula catalyst.
8. according to the method described in any one of claim 5~7, it is characterised in that step 1) the alumina particle thing enters
Deduster separation hopper (7), then pass through flue gas after feedback outlet (12) entrance purification.
9. according to the method described in any one of claim 5~8, it is characterised in that when flue gas working condition is normal, described one
Number electric guard board door (2) is closed, and No. two electric guard board doors (4) and No. three electric guard board doors (13) are in
Open mode；Methods described comprises the following steps：
1) aluminium oxide calcining flue gas flue gas passes through after hot electrostatic precipitator (6), removes the alumina particle thing in flue gas；It is described
Alumina particle thing enters deduster separation hopper (7), then passes through flue gas after feedback outlet (12) entrance purification；
2) flue gas enters SCR denitration reactor (10) after dedusting, NO in flue gasxWith NH3In vanadium tungsten titanium honeycomb and/or vanadium tungsten titanium plate
SCR denitration reaction occurs in 300~350 DEG C under the catalytic action of formula catalyst and is converted into N2, it is purified rear flue gas；The NH3
In ammoniacal liquor, urea or liquefied ammonia any one or at least two combination；The NH3With NO in flue gasxMol ratio be
(0.5~1.2):1；
3) the alumina particle thing enters deduster separation hopper (7), then passes through flue gas after feedback outlet (12) entrance purification；
4) flue gas leads back mouth (14) returning alumina roasting production system through flue gas after the purification；
When high temperature impact occurs for flue gas aluminium oxide calcining production system, the No.1 electric guard board door (2) is in open mode,
No. two electric guard board doors (4) and No. three electric guard board doors (13) are closed, while by the emergent cooling
After agent entrance (5) penetrating cooling agent to bypass flue temperature is less than 350 DEG C, the emergent coolant entrance (5) stops spraying into
Cooling agent.
10. such as any one of Claims 1 to 4 application of the described device in aluminium oxide calcining denitrating flue gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711078478.6A CN107626202B (en) | 2017-11-06 | 2017-11-06 | A kind of SCR denitration device, the method and its application of aluminium oxide calcining flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711078478.6A CN107626202B (en) | 2017-11-06 | 2017-11-06 | A kind of SCR denitration device, the method and its application of aluminium oxide calcining flue gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107626202A true CN107626202A (en) | 2018-01-26 |
| CN107626202B CN107626202B (en) | 2019-12-03 |
Family
ID=61107230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711078478.6A Active CN107626202B (en) | 2017-11-06 | 2017-11-06 | A kind of SCR denitration device, the method and its application of aluminium oxide calcining flue gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107626202B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111085105A (en) * | 2018-10-24 | 2020-05-01 | 中国石油化工股份有限公司 | Method and device for treating acrylonitrile catalyst roasting tail gas |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201108808Y (en) * | 2007-09-27 | 2008-09-03 | 中电投远达环保工程有限公司 | Prepositioned cyclone pre-dedusting SCR smoke-gas denitration device |
| WO2015067363A1 (en) * | 2013-11-06 | 2015-05-14 | Thyssenkrupp Industrial Solutions Ag | Method for cleaning bypass gases of the cement or mineral industry, and system of the cement or mineral industry |
| CN106215652A (en) * | 2016-08-31 | 2016-12-14 | 上海交通大学 | The combination denitrating system of a kind of aluminium oxide calcining flue gas and method |
| CN106687200A (en) * | 2014-09-24 | 2017-05-17 | 林德股份公司 | Methods for removing contaminants from exhaust gases |
| CN107243235A (en) * | 2017-06-16 | 2017-10-13 | 江苏科行环保科技有限公司 | A kind of aluminium oxide calcining composite S NCR SCR flue-gas denitration process |
| CN107281915A (en) * | 2017-07-19 | 2017-10-24 | 中国科学院过程工程研究所 | SNCR and SCR the combination denitrating system and method for denitration of a kind of aluminium oxide calcining flue gas |
-
2017
- 2017-11-06 CN CN201711078478.6A patent/CN107626202B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201108808Y (en) * | 2007-09-27 | 2008-09-03 | 中电投远达环保工程有限公司 | Prepositioned cyclone pre-dedusting SCR smoke-gas denitration device |
| WO2015067363A1 (en) * | 2013-11-06 | 2015-05-14 | Thyssenkrupp Industrial Solutions Ag | Method for cleaning bypass gases of the cement or mineral industry, and system of the cement or mineral industry |
| CN106687200A (en) * | 2014-09-24 | 2017-05-17 | 林德股份公司 | Methods for removing contaminants from exhaust gases |
| CN106215652A (en) * | 2016-08-31 | 2016-12-14 | 上海交通大学 | The combination denitrating system of a kind of aluminium oxide calcining flue gas and method |
| CN107243235A (en) * | 2017-06-16 | 2017-10-13 | 江苏科行环保科技有限公司 | A kind of aluminium oxide calcining composite S NCR SCR flue-gas denitration process |
| CN107281915A (en) * | 2017-07-19 | 2017-10-24 | 中国科学院过程工程研究所 | SNCR and SCR the combination denitrating system and method for denitration of a kind of aluminium oxide calcining flue gas |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111085105A (en) * | 2018-10-24 | 2020-05-01 | 中国石油化工股份有限公司 | Method and device for treating acrylonitrile catalyst roasting tail gas |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107626202B (en) | 2019-12-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2971738C (en) | Method and apparatus for denitration and desulfurization of and dust removal from fcc tail gas by ammonia-based process | |
| CN103349892B (en) | A kind of cross-current type twin-stage moving-bed active coke waste gas integrated purification tower | |
| CN101564640B (en) | Combined removal method for contaminants from coal-fired flue gas and special purification reactor thereof | |
| CN107551757A (en) | A kind of flue gas desulfurization and denitration method and device | |
| CN109731451A (en) | A kind of cement kiln flue gas SDS dry desulfurization and low dirt SCR denitration purification device and technique | |
| CN101511446A (en) | Method for removing tittle deleterioussubstance in air exhaust and operation method thereof | |
| CN110052141A (en) | The desulphurization denitration dedusting minimum discharge technique and system of sour feedstock production cement | |
| CN107596798A (en) | A kind of pre- dedusting and desulphurization and denitration integrated treatment unit and method | |
| CN107281915A (en) | SNCR and SCR the combination denitrating system and method for denitration of a kind of aluminium oxide calcining flue gas | |
| CN105126567A (en) | Method and device for removing nitric oxide and sulfur oxide from gas flow | |
| CN201832548U (en) | Denitration treatment device for purifying flue gas | |
| CN102527207B (en) | Method for removing multiple pollutants at the same time through electrostatic enhanced catalytic oxidation device used therein | |
| CN103405991B (en) | Energy-efficient comprehensive desulfurization and purification system and method for active coke of different flue gases | |
| CN109647158B (en) | Flue gas desulfurization and denitrification system of circulating fluidized bed boiler and treatment method thereof | |
| CN114053812B (en) | High-temperature dust-containing gas dust removal, desulfurization and denitrification integrated device and method | |
| CN111495106B (en) | Temperature control system and temperature control method for active coke adsorption tower | |
| CN105833692B (en) | Industrial smoke dry type low temperature cooperates with dust-removal and desulfurizing denitration removal of mercury integrated apparatus and technique | |
| CN107961660A (en) | Flue gas dry desulfurizing method of denitration based on ozone and red mud | |
| CN107626202B (en) | A kind of SCR denitration device, the method and its application of aluminium oxide calcining flue gas | |
| CN104587812A (en) | Flue gas low-temperature efficient integrated desulfurization and denitrification method and system | |
| CN110180389A (en) | Flue gas treating process and its device in waste alumina regenerative process | |
| CN102961954B (en) | Exhaust gas NOx emission reduction device of cement kiln | |
| CN205815443U (en) | A kind of industry coal-boiler minimum discharge environmental protection island system | |
| CN103170229A (en) | Desulfurization and denitration integrated system of industrial kiln stove | |
| CN106731798A (en) | Granule materials Industrial Boiler flue gas denitrification system and method for denitration |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |