CN208612146U - A kind of dedusting denitration device - Google Patents
A kind of dedusting denitration device Download PDFInfo
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- CN208612146U CN208612146U CN201821118032.1U CN201821118032U CN208612146U CN 208612146 U CN208612146 U CN 208612146U CN 201821118032 U CN201821118032 U CN 201821118032U CN 208612146 U CN208612146 U CN 208612146U
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- denitration device
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 82
- 239000000428 dust Substances 0.000 claims abstract description 62
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 40
- 239000012716 precipitator Substances 0.000 claims abstract description 32
- 239000007921 spray Substances 0.000 claims abstract description 27
- 239000002918 waste heat Substances 0.000 claims abstract description 22
- 230000003750 conditioning effect Effects 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 7
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 claims description 4
- 239000003054 catalyst Substances 0.000 abstract description 19
- 238000013517 stratification Methods 0.000 abstract description 9
- 238000005299 abrasion Methods 0.000 abstract description 8
- 239000012141 concentrate Substances 0.000 abstract description 5
- 231100000572 poisoning Toxicity 0.000 abstract description 3
- 230000000607 poisoning effect Effects 0.000 abstract description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 18
- 239000003546 flue gas Substances 0.000 description 18
- 238000000034 method Methods 0.000 description 17
- 238000005516 engineering process Methods 0.000 description 13
- 238000010586 diagram Methods 0.000 description 10
- 230000008901 benefit Effects 0.000 description 8
- 239000004568 cement Substances 0.000 description 8
- 239000000919 ceramic Substances 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 230000009466 transformation Effects 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 6
- 238000001914 filtration Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 229920000914 Metallic fiber Polymers 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 230000010354 integration Effects 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000007634 remodeling Methods 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000012717 electrostatic precipitator Substances 0.000 description 2
- 238000002309 gasification Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008092 positive effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- WWILHZQYNPQALT-UHFFFAOYSA-N 2-methyl-2-morpholin-4-ylpropanal Chemical compound O=CC(C)(C)N1CCOCC1 WWILHZQYNPQALT-UHFFFAOYSA-N 0.000 description 1
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 206010027439 Metal poisoning Diseases 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 239000000908 ammonium hydroxide Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 239000007789 gas 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
- 238000010438 heat treatment Methods 0.000 description 1
- 235000012054 meals Nutrition 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
Abstract
The utility model belongs to dedusting denitration field, in particular to a kind of dedusting denitration device, the dedusting denitration device includes hot precipitator, spray ammonia system and SCR reactor, the outlet of the hot precipitator is connected with the entrance of SCR reactor, before the spray ammonia system is placed in hot precipitator or is placed between hot precipitator and SCR reactor.The utility model provides a kind of solution SCR catalyst in high concentrate dust environment, easy to wear, poisoning, blockage problem, while solving waste heat boiler abrasion, tube wall dust stratification problem, denitration efficiency is improved, equipment land occupation is saved, greatly improves the dedusting denitration device of heat exchange efficiency and boiler life.
Description
Technical field
The utility model belongs to dedusting denitration field, in particular to a kind of dedusting denitration device.
Background technique
With the continuous improvement of national environmental standard, the existing denitration technology of cement industry (including SNCR denitration, low nitrogen combustion
Burning, fractional combustion etc.) denitration efficiency is low, generally 60%~80% or so, has been unable to satisfy higher NOx emission standard, it needs
Using highly efficient SCR denitration technology.It is influenced by SCR catalyst optimal reaction temperature and ammonium hydrogen sulfate, carries out SCR denitration
Optimum position is in preheater near exit.In order to save the energy, cement industry using multistage cyclone cylinder pre-heating to raw meal powder into
Row heat exchange preheating, efficiency of dust collection is low, and it is higher that level-one cylinder exports dust concentration.High concentrate dust can make SCR catalyst produce quickly
Phenomena such as raw abrasion, alkali metal poisoning, blocking, denitration efficiency and the service life of SCR catalyst is greatly reduced, therefore, is carrying out SCR
It needs to carry out high-temperature dust removal before denitration.But existing cement production process equipment is more, spaces compact, places high temperature without redundant space
Deduster.Meanwhile existing UTILIZATION OF VESIDUAL HEAT IN technique high concentrate dust enters waste heat boiler will cause heat exchange pipe abrasion, dust stratification reduces
The problems such as heat exchange efficiency.
Therefore, these problems are based on, provide a kind of solution SCR catalyst in high concentrate dust environment, it is easy to wear, in
Poison, blockage problem, while waste heat boiler abrasion is solved, tube wall dust stratification problem improves denitration efficiency, saves equipment land occupation, significantly
The dedusting denitration device for improving heat exchange efficiency and boiler life has important practical significance.
Utility model content
The utility model is to solve technical problem present in well-known technique and provide a kind of solution SCR catalyst highly concentrated
It spends in dust atmosphere, easy to wear, poisoning, blockage problem, while solving waste heat boiler abrasion, tube wall dust stratification problem improves denitration
Efficiency saves equipment land occupation, greatly improves the dedusting denitration device of heat exchange efficiency and boiler life.
The utility model is adopted the technical scheme that solve technical problem present in well-known technique:
A kind of dedusting denitration device, the dedusting denitration device include hot precipitator, spray ammonia system and SCR reactor,
The outlet of the hot precipitator is connected with the entrance of SCR reactor, the spray ammonia system be placed in front of hot precipitator or
Person is placed between hot precipitator and SCR reactor.
The utility model can also use following technical scheme:
In above-mentioned dedusting denitration device, further, the SCR reactor and the hot precipitator are designed as one
Body equipment, is denoted as high-temperature dust removal SCR denitration integrated equipment, and the spray ammonia system is placed in the high-temperature dust removal SCR denitration one
Before equipment.
In above-mentioned dedusting denitration device, further, the dedusting denitration device further includes waste heat boiler and humidification
Tower, the SCR reactor, waste heat boiler and conditioning Tower are sequentially connected.
In above-mentioned dedusting denitration device, further, the waste heat boiler downstream be also connected in turn high-temperature blower,
Raw mill, deduster and last row blower.
In above-mentioned dedusting denitration device, further, the dedusting denitration device further includes preheater, the preheating
Device is Pyatyi preheater, and the Pyatyi preheater includes the Pyatyi cylinder being sequentially connected, level Four cylinder, three-level cylinder, second level cylinder and level-one
Cylinder, the level-one cylinder are removed, and the outlet of the second level cylinder of the preheater is connected with the entrance of the hot precipitator, the height
Warm deduster, spray ammonia system and SCR reactor are placed on the position of the level-one cylinder.
In above-mentioned dedusting denitration device, further, the dedusting denitration device further includes that SNCR denitration processing is set
Standby, the outlet of the SNCR denitration processing equipment is connected with the entrance of the preheater.
The utility model has the advantages and positive effects of:
1, by SCR catalyst after dedusting, catalyst is not influenced the utility model high-temperature flue gas by dust, can be improved de-
Nitre efficiency reduces catalyst amount, greatly improves catalyst service life.
2, the utility model high-temperature flue gas enters rear class waste heat boiler after dedusting denitration, and waste heat boiler mill can be greatly decreased
Damage, tube wall dust stratification reduce plant maintenance work and fund；Heat exchange efficiency can be improved, so that the long-term high-efficiency operation of equipment.
3, existing SNCR technology denitration efficiency 60~80%, the utility model allow cement industry using SNCR+SCR
Denitration technology or SCR technology realize high efficiency denitration, and efficiency reaches 90% or more, can meet dust and NOxMinimum discharge want
It asks.SNCR system equipment mainly has ammonia storage tank, and pump group and spray gun etc. do not carry out SNCR system any in this technological transformation
Change, only by SNCR system and we changed behind high-temperature dust removal add SCR denitration system to connect.
4, the utility model utilizes the spatial position of original preheater level-one cylinder, is not necessarily to additional floor space, mentions for transformation
For advantage.
5, ammonia NH in the utility model3It is the reducing agent of denitration reaction, therefore the application increases spray ammonia system.Spray ammonia system
System is mainly pump group and spray gun, and ammonia is exactly uniformly sprayed into pipeline by main function, so that ammonia and high-temperature flue gas are sufficiently mixed,
Improve reaction efficiency.
6, level-one cylinder is changed to high-temperature dust removal SCR denitration integration apparatus by improving by the utility model.
7, after the utility model level-one cylinder is changed to hot precipitator and SCR reactor or integration apparatus, overall resistance meeting
It increased, therefore fan pressure head needs to increase.
Detailed description of the invention
The technical solution of the utility model is described in further detail below with reference to drawings and examples, still
It should be known that these attached drawings are designed for task of explanation, therefore not as the restriction of the scope of the utility model.In addition,
Unless otherwise indicated, these attached drawings are meant only to conceptually illustrate structure construction described herein, without to carry out to scale
It draws.
Fig. 1 is the structural schematic diagram of the prior art；
Fig. 2 is the structural schematic diagram of embodiment one；
Fig. 3 is the structural schematic diagram of embodiment two；
Fig. 4 is the layout of equipment of the prior art；
Fig. 5 is the layout of equipment of embodiment one；
Fig. 6 is the layout of equipment of embodiment two；
Fig. 7 is the structural schematic diagram before the transformation of level-one cylinder；
Fig. 8 is the improved structural schematic diagram of level-one cylinder.
In figure:
1, SNCR denitration processing equipment, 2, preheater, 3, hot precipitator, 4, spray ammonia system, 5, SCR reactor, 6, remaining
Heat boiler, 8, high-temperature dust removal SCR denitration integrated equipment, 9, cement kiln, 10, dore furnace, 11, level-one cylinder, 12, second level cylinder, 13, three
Grade cylinder, 14, level Four cylinder, 15, Pyatyi cylinder, 16, conditioning Tower, 17, high-temperature blower, 18, raw mill, 19, deduster, 20, last row wind
Machine, 22, dust-laden room, 23, air-purifying chamber, 24, filter cylinder, 25, orifice plate.
Specific embodiment
Firstly, it is necessary to which explanation, illustrates the dedusting denitration device of the utility model for by way of example below
Specific structure, features and advantages etc., however what all descriptions were intended merely to be illustrated, and should not be construed as to this
Utility model forms any restrictions.In addition, any single technology for being described by or implying in each embodiment mentioned by this paper
Feature, or shown or implicit any single technical characteristic in the drawings, still can these technical characteristics (or its etc.
Jljl) between continue any combination or delete, to obtain the utility model that may do not referred to directly herein
More other embodiments.In addition, same or like technical characteristic in the same figure may be only for the sake of simplifying drawing
It is indicated at one.
It will be understood that when component ' attach ' to another component when it is said that, it can be directly connected to another component or
There may be intermediate members.On the contrary, when component " being directly connected to " being arrived another component when it is said that, then it represents that middle part is not present
Part.
Fig. 1 gives the structural schematic diagram of the prior art, and by Fig. 2 shows the structural schematic diagram of embodiment one,
And the structural schematic diagram of embodiment two is shown by Fig. 3, and the layout of equipment of the prior art is shown by Fig. 4,
And the layout of equipment of embodiment one is shown by Fig. 5, and the layout of equipment of embodiment two is shown by Fig. 6,
And the structural schematic diagram before the transformation of level-one cylinder is shown by Fig. 7, and the improved structure of level-one cylinder is shown by Fig. 8
Schematic diagram, below just illustrate the utility model in conjunction with Fig. 1 to Fig. 8.
For the utility model content, feature and effect that can further appreciate that the utility model, the following examples are hereby given, and
It is described in detail with the accompanying drawings as follows:
A kind of dedusting denitration device, the dedusting denitration device include hot precipitator 3, spray ammonia system 4 and SCR reactor
5, the outlet of the hot precipitator 3 is connected with the entrance of SCR reactor 5, and the spray ammonia system 4 is placed in hot precipitator 3
Before or it is placed between hot precipitator 3 and SCR reactor 5.
By SCR catalyst after dedusting, catalyst is not influenced the utility model high-temperature flue gas by dust, and denitration can be improved
Efficiency reduces catalyst amount, greatly improves catalyst service life.
For further, it can also consider in the present invention, the SCR reactor 5 and the hot precipitator 3
It is designed as integrated equipment, is denoted as high-temperature dust removal SCR denitration integrated equipment 8, the spray ammonia system 4 is placed in the high-temperature dust removal
Before SCR denitration integrated equipment 8.
As an example, in the present embodiment, hot precipitator 3 can be hot electrostatic precipitator, can also remove for high temperature filter cylinder 24
Dirt device, filtering material can be ceramic fibre, ceramic membrane, metallic fiber, metal film, the high-temperature dust removal denitrification integral equipment
The filtering material used can be ceramic fibre, ceramic membrane, metallic fiber, metal film.
It should be pointed out that the dedusting denitration device further includes waste heat boiler 6 and conditioning Tower 16, the SCR reactor
5, waste heat boiler 6 and conditioning Tower 16 are sequentially connected.
The utility model high-temperature flue gas enters rear class waste heat boiler 6 after dedusting denitration, and the mill of waste heat boiler 6 can be greatly decreased
Damage, tube wall dust stratification reduce plant maintenance work and fund；Heat exchange efficiency can be improved, so that the long-term high-efficiency operation of equipment.
It should be pointed out that the dedusting denitration device further includes preheater 2, the preheater 2 is Pyatyi preheater 2,
The Pyatyi preheater 2 includes Pyatyi cylinder 15, level Four cylinder 14, three-level cylinder 13, second level cylinder 12 and the level-one cylinder 11 being sequentially connected, institute
It states level-one cylinder 11 to be removed, the outlet of the second level cylinder 12 of the preheater 2 is connected with the entrance of the hot precipitator 3, described
Hot precipitator 3, spray ammonia system 4 and SCR reactor 5 are placed on the position of the level-one cylinder 11.
For further, it can also consider in the present invention, the dedusting denitration device further includes SNCR denitration
The outlet of processing equipment 1, the SNCR denitration processing equipment 1 is connected with the entrance of the preheater 2.
It should be pointed out that 6 downstream of waste heat boiler is also connected with high-temperature blower 17, raw mill 18, deduster in turn
19 and last row blower 20.
In the prior art, first is that denitration efficiency is low to can only achieve 60-80%, it is unable to satisfy higher environmental requirement.Second is that
Cyclone dust removal low efficiency, into the high 60-100g/m of exhaust gas dust content of afterheat generating system3, will lead to the mill of waste heat boiler 6
The problems such as damage, tube wall dust stratification, reduction heat exchange efficiency.
Currently, there is the case where using individual SNCR technology in the prior art, which is had the disadvantage in that in dore furnace
Ammonia is sprayed in 10, the dust concentration of flue gas is high, and ammonia is understood some and taken away by dust, do not participate in denitration reaction, cause ammonia spraying amount
High (operating cost increase) and the escaping of ammonia (environmental protection is not up to standard).Theoretically ammonia nitrogen molar ratio is 1:1, but SNCR in practical operation
Ammonia nitrogen molar ratio to reach 1:1.4~1:1.6 even higher.After high-temperature dust removal, using SCR, the ammonia nitrogen molar ratio of ammonia is sprayed only
Need 1:1.05.
Existing SNCR technology denitration efficiency 60~80%, the utility model allow cement industry de- using SNCR+SCR
Nitre technology or SCR technology realize high efficiency denitration, and efficiency reaches 90% or more, can meet dust and NOxMinimum discharge want
It asks.SNCR system equipment mainly has ammonia storage tank, and pump group and spray gun etc. do not carry out SNCR system any in this technological transformation
Change, only by SNCR system and we changed behind high-temperature dust removal add SCR denitration system to connect.
The course of work: the high-temperature flue gas in cement kiln 9 is introduced into dore furnace 10, (it is de- that SNCR is carried out in dore furnace 10
Nitre, can also be without SNCR denitration, if having carried out SNCR denitration, and entire technique is exactly SNCR+ high-temperature dust removal+SCR；If without
SNCR denitration, high-temperature flue gas only passed through in dore furnace 10, not denitration, entire technique is exactly high-temperature dust removal+SCR) again into 2 to
5 grades of preheaters 2, complete the heat exchange of high-temperature flue gas and low-temperature material in preheater 2, and high-temperature flue gas enters improved high temperature
Deduster 3 or integration apparatus.After carrying out high-temperature dust removal and SCR denitration, afterheat generating system is entered back into, fume afterheat is carried out and returns
It receives, enters back into backend process system.
The utility model has the advantages that meet minimum discharge first is that denitration efficiency is high by 90%, second is that high dust collection efficiency, into cogeneration
The dust of system can be controlled in 10mg/m3Hereinafter, dustless state is basically reached, so that the abrasion of waste heat boiler 6 is solved, tube wall product
The problems such as ash, reduction heat exchange efficiency.Third is that ammonia spraying amount is few, ammonia spraying amount 50% can be saved.
Our process flow should be the high-temperature flue gas of calcining in kiln through dore furnace 10, and SNCR is carried out in dore furnace 10
Denitration, then preheated device 2 gradually exchange heat, and flue-gas temperature is down to 300-350 DEG C, are removed using improved hot precipitator 3
Dirt, then SCR denitration is carried out, enter back into rear class afterheat generating system.And our technique can not have to SNCR, direct preheater
2 high-temperature flue gas come out carry out SCR denitration after carrying out high-temperature dust removal again.It is de- that SNCR+ high-temperature dust removal+SCR can namely be formed
The process of nitre can also directly adopt the process of high-temperature dust removal+SCR.
As an example, in the present embodiment, dedusting denitration device described in any of the above embodiments is to utilize preheating by described
Device level-one cylinder is dusted the dedusting denitration device after denitration remodeling method is transformed, described to be carried out using preheater level-one cylinder
Dedusting denitration remodeling method the following steps are included:
Step 1: original 2 level-one cylinder 11 of preheater is removed, using its shell or spatial position, places newly-increased high temperature
Deduster 3 and SCR reactor 5；
Step 2: increase spray ammonia system 4 on the pipeline before hot precipitator 3, or in hot precipitator 3 and SCR
Increase spray ammonia system 4 on pipeline between reactor 5.
The utility model utilizes the spatial position of original 2 level-one cylinder 11 of preheater, is not necessarily to additional floor space, mentions for transformation
For advantage.
It should be pointed out that the SCR reactor 5 and the hot precipitator 3 are designed as integrated equipment, it is denoted as high temperature and removes
Dirt SCR denitration integrated equipment 8 is equipped with spray ammonia system 4 before the high-temperature dust removal SCR denitration integrated equipment 8.
Spray ammonia has several at present, first is that being pyrolyzed using urea to it, generates ammonia, pipeline is sprayed into, second is that using liquid
Ammonia is injected directly into pipeline, and direct gasification is ammonia, third is that being equally directly injected directly into pipeline using ammonium hydroxide, direct gasification is ammonia
Gas.
Ammonia NH in the utility model3It is the reducing agent of denitration reaction, therefore the application increases spray ammonia system 4.Spray ammonia system
Ammonia is exactly uniformly sprayed into pipeline by system 4 mainly pump group and spray gun, main function, so that ammonia and high-temperature flue gas are sufficiently mixed
It closes, improves reaction efficiency.
It for further, can also consider in the present invention, be using the step of its shell in the step 1
With orifice plate 25 and the filter cylinder 24 being mounted on the orifice plate 25 inside level-one cylinder 11, air-purifying chamber will be divided into inside level-one cylinder 11
23 and 22 two parts of dust-laden room, it is denoted as sack cleaner structure.
Level-one cylinder 11 is changed to high-temperature dust removal SCR denitration integration apparatus by improving by the utility model.
It should be pointed out that the sack cleaner structure be outside filtering type or inward flow filtration-type, air inlet mode be upper air or under
Air inlet.
For further, it can also consider in the present invention, to the high-temperature blower in 16 exit of conditioning Tower
17 carry out pressure head increase transformation.
The utility model level-one cylinder 11 is changed to hot precipitator 3 and SCR reactor 5 or high-temperature dust removal SCR denitration is integrally set
After standby 8, overall resistance can be increased, therefore fan pressure head needs to increase.
As an example, the hot precipitator 3 for replacing or being transformed level-one cylinder 11 can be hot electrostatic precipitator, can also be height
Warm 24 deduster of filter cylinder (filtering material can be ceramic fibre, ceramic membrane, metallic fiber, metal film).For replacing or being transformed one
The filtering material that the high-temperature dust removal SCR denitration integrated equipment 8 of grade cylinder 11 uses can be ceramic fibre, ceramic membrane, metallic fiber, gold
Belong to film.Its dedusting denitrification process are as follows: if the original SNCR denitration system of benefit, flue gas first carries out SNCR denitration, then carries out high temperature and remove
Dirt, then SCR denitration is carried out, form SNCR+ high-temperature dust removal+SCR denitration process.If not having to original SNCR system, flue gas is direct
High-temperature dust removal is carried out, then carries out SCR denitration, forms high-temperature dust removal+SCR denitration process.
The advantages and positive effects of the utility model are as follows: allow cement industry using SNCR+SCR denitration technology, or
SCR technology realizes high efficiency denitration (90% or more efficiency), can meet dust and the minimum discharge requirement of NOx.High-temperature flue gas warp
By SCR catalyst after dedusting, catalyst is not influenced by dust, and denitration efficiency can be improved, and is reduced catalyst amount, is greatly improved
Catalyst service life.High-temperature flue gas enters rear class waste heat boiler 6 after dedusting denitration, and the abrasion of waste heat boiler 6 can be greatly decreased,
Tube wall dust stratification reduces plant maintenance work and fund；Heat exchange efficiency can be improved, so that the long-term high-efficiency operation of equipment.Original preheating
2 level-one cylinder of device, 11 efficiency of dust collection exports dust concentration up to 60g/Nm 90% or so3, dust takes away heat about 7.33Kcal/
kg.cl.After being changed to hot precipitator 3, efficiency of dust collection exports dust concentration in 10mg/m 99.9% or more3Hereinafter, dust institute
Heat is substantially all recycles into kiln system for band.5000t/d production line operate per year 300 days calculate, can save mark 1500 tons of coal/
Year.Meanwhile the spatial position of the original 2 level-one cylinder 11 of preheater of the utility model technology utilization, it is not necessarily to additional floor space, to change
Offer advantage is provided.
In conclusion the utility model can provide a kind of solution SCR catalyst in high concentrate dust environment, it is easy to wear,
Poisoning, blockage problem, while waste heat boiler abrasion is solved, tube wall dust stratification problem improves denitration efficiency, saves equipment land occupation, greatly
The big dedusting denitration device and its remodeling method for improving heat exchange efficiency and boiler life.
The utility model is described in detail in above embodiments, but the content is only the preferable reality of the utility model
Example is applied, should not be considered as limiting the scope of the present invention.Equalization made according to the scope of application of this utility model
Variation and improvement etc., should still belong within the patent covering scope of the utility model.
Claims (6)
1. a kind of dedusting denitration device, it is characterised in that: the dedusting denitration device include hot precipitator, spray ammonia system and
The outlet of SCR reactor, the hot precipitator is connected with the entrance of SCR reactor, and the spray ammonia system is placed in high temperature and removes
Before dirt device or it is placed between hot precipitator and SCR reactor.
2. dedusting denitration device according to claim 1, it is characterised in that: the SCR reactor and the high-temperature dust removal
Device is designed as integrated equipment, is denoted as high-temperature dust removal SCR denitration integrated equipment, and the spray ammonia system is placed in the high-temperature dust removal
Before SCR denitration integrated equipment.
3. dedusting denitration device according to claim 1, it is characterised in that: the dedusting denitration device further includes waste heat pot
Furnace and conditioning Tower, the SCR reactor, waste heat boiler and conditioning Tower are sequentially connected.
4. dedusting denitration device according to claim 3, it is characterised in that: the waste heat boiler downstream is also connected in turn
High-temperature blower, raw mill, deduster and last row blower.
5. dedusting denitration device according to claim 1, it is characterised in that: the dedusting denitration device further includes preheating
Device, the preheater are Pyatyi preheater, and the Pyatyi preheater includes the Pyatyi cylinder, level Four cylinder, three-level cylinder, two being sequentially connected
Grade cylinder and level-one cylinder, the level-one cylinder are removed, the outlet of the second level cylinder of the preheater and the entrance of the hot precipitator
It is connected, the hot precipitator, spray ammonia system and SCR reactor are placed on the position of the level-one cylinder.
6. dedusting denitration device according to claim 5, it is characterised in that: the dedusting denitration device further includes SNCR de-
The outlet of nitre processing equipment, the SNCR denitration processing equipment is connected with the entrance of the preheater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821118032.1U CN208612146U (en) | 2018-07-13 | 2018-07-13 | A kind of dedusting denitration device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821118032.1U CN208612146U (en) | 2018-07-13 | 2018-07-13 | A kind of dedusting denitration device |
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| Publication Number | Publication Date |
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| CN208612146U true CN208612146U (en) | 2019-03-19 |
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| CN201821118032.1U Withdrawn - After Issue CN208612146U (en) | 2018-07-13 | 2018-07-13 | A kind of dedusting denitration device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108686475A (en) * | 2018-07-13 | 2018-10-23 | 天津水泥工业设计研究院有限公司 | A kind of dedusting denitration device and its remodeling method |
-
2018
- 2018-07-13 CN CN201821118032.1U patent/CN208612146U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108686475A (en) * | 2018-07-13 | 2018-10-23 | 天津水泥工业设计研究院有限公司 | A kind of dedusting denitration device and its remodeling method |
| CN108686475B (en) * | 2018-07-13 | 2024-01-12 | 天津水泥工业设计研究院有限公司 | Dedusting and denitration equipment and transformation method thereof |
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