CN107335327A - A kind of flue gas desulfurization denitration dust-removing integrated system - Google Patents
A kind of flue gas desulfurization denitration dust-removing integrated system Download PDFInfo
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- CN107335327A CN107335327A CN201710524742.8A CN201710524742A CN107335327A CN 107335327 A CN107335327 A CN 107335327A CN 201710524742 A CN201710524742 A CN 201710524742A CN 107335327 A CN107335327 A CN 107335327A
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- flue gas
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- desulfurization denitration
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- 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
- B01D53/76—Gas phase processes, e.g. by using aerosols
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- 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
- B01D53/02—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 by adsorption, e.g. preparative gas chromatography
- B01D53/04—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 by adsorption, e.g. preparative gas chromatography with stationary adsorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2062—Ammonia
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/12—Methods and means for introducing reactants
- B01D2259/122—Gaseous reactants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2267/00—Multiple filter elements specially adapted for separating dispersed particles from gases or vapours
- B01D2267/40—Different types of filters
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
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- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
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Abstract
The present invention discloses a kind of flue gas desulfurization denitration dust-removing integrated system, including the ICFB, deduster and double-layer filter material grain bed being sequentially connected, the ICFB is connected with boiler fired coal flue gas inlet pipe, the boiler fired coal flue gas inlet pipe is provided with Venturi tube with the ICFB junction, the ICFB adds system with modified active coke respectively and ammonia adds system and is connected, atomizer is provided with the middle part of the ICFB, the modified active coke is made up of following preparation methods：Activated coke or activated carbon are taken, is soaked with sulfuric acid solution, adds coal tar, Fe2O3And Cr2O3After well mixed shaping, dry, activate, crush under an inert atmosphere, producing.Inventive desulfurization denitration dust-removing integrated technique have technique simple, good reliability, take up an area less, reduced investment, operating cost are low, byproduct recovery it is alternative it is good, water consumption non-secondary pollution, that desulphurization denitration can be achieved is not dust removal integrated.
Description
Technical field
It is more particularly to a kind of flue gas desulfurization denitration dust-removing integrated the present invention relates to flue gas desulfurization environmental protection technical field
System.
Background technology
The coal resources medium-high sulfur coal content in China is more, according to incompletely statistics the resource coal sulfur-bearing in the whole nation about 13%
Measure (mass fraction) and be higher than 2%.And containing elements such as substantial amounts of C, H, S, N in coal, therefore the direct burning and exhausting of coal is substantial amounts of
Pollutant has resulted in China's atmospheric environment in serious coal-smoke pollution (i.e. with total suspended particles (TSP), sulfur dioxide
(SO2), oxynitrides (NOx) and carbon dioxide (CO2) it is principal character.About 85%SO in China's air2, 85%CO2,
60%NOx and 70% TSP is all from the burning of coal, and very big harm is all caused to natural ecological environment and the mankind.Its
In again with SO2It is the most serious with NOx, lose and endanger most acute caused by the life to natural environment and the mankind.Caused by them
Acid rain is known, or even is referred to as " aerial Death " by scientists from all over the world.
SO2Distribution is wide in an atmosphere, influences quite big, is the polluter of atmosphere pollution leading indicator, it is that have thorn
Swash the colourless gas of property and stinkpot, it is soluble in water.Oxynitrides (NOx) is another main harmful in atmosphere pollution
Material, its species is a lot, mainly there is 7 kinds of forms：N2O5、N2O4、N2O3、N2O2、N2O、NO、NO2, collectively referred to as NOx.
Therefore, the SO in coal-fired flue-gas how is cost-effectively removed2And NOxCountries in the world government and research are caused
The attention of person.At present, boiler smoke dust (particularly pellet), NOx and SO are controlled in the world2That discharges is most effective
Method is sack cleaner, ammine selectivity catalytic reduction method (SCR) and lime or limestone wet desulfurization respectively.But by this three
The flue gas purifying technique that individual link is together in series, because equipment flowsheet is grown, investment and operating cost are high, so being promoted in countries in the world
Application all suffers from very big economic pressures.
The content of the invention
The invention provides a kind of flue gas desulfurization denitration dust-removing integrated system, solves in existing removal coal-fired flue-gas
SO2And NOxThe problem of equipment flowsheet is long in technique, investment and operating cost are high.
In order to solve the above technical problems, the technical proposal of the invention is realized in this way：
A kind of flue gas desulfurization denitration dust-removing integrated system, including ICFB, the deduster and double being sequentially connected
Layer filtering material particle bed, the ICFB are connected with boiler fired coal flue gas inlet pipe, the boiler fired coal flue gas inlet pipe and institute
State ICFB junction and be provided with Venturi tube, the ICFB added respectively with modified active coke system and
Ammonia adds system connection, is provided with atomizer in the middle part of the ICFB, is provided with atomizer, drop is played to flue gas
The effect of temperature.The modified active coke is made up of following preparation methods：Activated coke or activated carbon are taken, is soaked with sulfuric acid solution,
Add coal tar, Fe2O3And Cr2O3After well mixed shaping, dry, activate, crush under an inert atmosphere, producing.
Wherein it is preferred to the Fe2O3Addition be the 5~15% of activated coke or quality of activated carbon, the Cr2O3's
Addition is the 5~15% of activated coke or quality of activated carbon, and the addition of the coal tar is the 5 of activated coke or quality of activated carbon
~10%.
Wherein it is preferred to which the activation temperature is 300~700 DEG C, the soak time is 1~3 hour.
Wherein it is preferred to the modified active coke, which adds system, includes storage bin and screw(-type) feeder, the screw feeder
Machine is connected by pipeline with the ICFB.
Wherein it is preferred to which the double-layer filter material grain bed bottom is connected with regenerator, the regenerator connects with separator
Connect, the separator is connected with the storage bin.
Wherein it is preferred to the regenerator is connected with sulfur recovery system.
Wherein it is preferred to be provided with multiple filter beds in the double-layer filter material grain bed, the filter bed includes cloth wind
Plate, quartz sand filtration layer is provided with the air distribution plate, expanded perlite filter layer is provided with the quartz sand filtration layer.
Wherein it is preferred to which the particle diameter of the expanded perlite is 2~5mm, the particle diameter of the quartz sand is 0.5~1mm.
Modified active focus layer, the modified active focus layer are additionally provided between the air distribution plate and the quartz sand filtration layer
Highly it is 7~8cm, the particle diameter of modified active coke is 2~3mm in the modified active focus layer.
Wherein it is preferred to the filter bed is connected with reverse-blow pipe.
Beneficial effect of the present invention：
The modified active coke specific surface area of the present invention is big, activity is high, stability is good, low-temperature catalyzed desulfurized effect is good.60
In long-time simulated experiment in the range of~150 DEG C, desulfuration efficiency is resistant to system middle and high concentration NO up to more than 85%XWith
The interference of the components such as CO.And NH3Addition, greatly improve the desulfurized effect of ICFB.
Double-layer filter material grain bed of the present invention uses two kinds of filtrates of thickness, and the coarse filtration bed of material is upper, and for the fine filtering bed of material under, collection is coarse-fine
Two-stage step is filtered in one, can obtain high filter efficiency and a lot of dust amount simultaneously.And add below double-layer filter material particle
Last layer modified active focus layer, greatly improves denitration effect.
Inventive desulfurization denitration dust-removing integrated technique have technique simple, good reliability, take up an area less, reduced investment, operation
Cost is low, byproduct recovery alternative is good, water consumption non-secondary pollution, achievable desulphurization denitration be not dust removal integrated, and desulfurization
Denitration dust collecting efficiency high (desulfurization degree ＞ 95%, denitration rate ＞ 90%, dust removal efficiency ＞ 99.994%), has a extensive future.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
To obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is the process chart of flue gas desulfurization denitration dust-removing integrated system in the present invention；
Fig. 2 is the structural representation of filter bed in the present invention.
In figure, 1- Venturi tubes, 2- ICFBs, 3- dedusters, 4- storage bins, 5- atomizers, 6- double-layer filter materials
Grain bed, 7- regenerators, 8- separators, 9- sulfur recovery systems, 10- filter beds, 11- air distribution plates, 12- quartz sand filtration layers,
13- expanded perlite filter layers, 14- modified active focus layer, 15- screw(-type) feeders
Embodiment
The technical scheme in the embodiment of the present invention is clearly and completely described below, it is clear that described embodiment
Only part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, the common skill in this area
The every other embodiment that art personnel are obtained under the premise of creative work is not made, belong to the model that the present invention protects
Enclose.
As depicted in figs. 1 and 2, the present embodiment provides a kind of flue gas desulfurization denitration dust-removing integrated system, including connects successively
ICFB 2, deduster 3 and the double-layer filter material grain bed 6 connect, ICFB 2 connect with boiler fired coal flue gas inlet pipe
Connect, boiler fired coal flue gas inlet pipe is provided with Venturi tube 1 with the junction of ICFB 2, and ICFB 2 is respectively with changing
Property activated coke add system and ammonia and add system and connect, the middle part of ICFB 2 is provided with atomizer 5, modified active
Jiao is made up of following preparation methods：Activated coke or activated carbon are taken, is soaked with sulfuric acid solution, adds coal tar, Fe2O3And Cr2O3
After well mixed shaping, dry, activate, crush under an inert atmosphere, producing.
Wherein, Fe2O3Addition for activated coke or quality of activated carbon 10%, Cr2O3Addition be activated coke or work
Property carbonaceous amount 10%, the addition of coal tar is the 7% of activated coke or quality of activated carbon.Activation temperature is 300~700 DEG C,
Soak time is 1~3 hour.Fe2O3And Cr2O3Addition not office in this, in the present invention, Fe2O3And Cr2O3Addition
It can be 5~15 to measure the component in flue gas.Also, in the present invention, using Fe2O3And Cr2O3Mixing add, it is de-
Sulphur nitrogen removal performance is all greatly improved, wherein using Fe2O3It can be reached as its desulfurization degree after catalyst modification activated coke
98.0%；Use Cr2O3Activated coke is modified, modified active coke desulfurization removing nitric effect can be increased substantially.Both add in mixing
96.0% can be brought up to from 55.7% by entering its desulfurization degree；Denitrification percent can bring up to 76.2% from 41.8%, and highest can reach
To 94.1%.And common activated coke its denitration rate is only 60% or so.
Wherein, modified active coke, which adds system, includes storage bin 4 and screw(-type) feeder 15, and screw(-type) feeder 15 passes through pipeline
It is connected with ICFB 2.The bottom of double-layer filter material grain bed 6 is connected with regenerator 7, and regenerator 7 is connected with separator 8,
Separator 8 is connected with storage bin 4.Regenerator 7 and separator 8 be set, and the modified active coke of double-layer filter material grain bed 6 can be with
Recycling.
In order to further improve the utilization rate of waste, regenerator 7 is connected with sulfur recovery system 9.
Wherein, multiple filter beds 10 are provided with double-layer filter material grain bed 6, filter bed 10 includes air distribution plate 11, air distribution plate
Quartz sand filtration layer 12 is provided with 11, expanded perlite filter layer 13 is provided with quartz sand filtration layer 12.Expanded perlite
Particle diameter be 2~5mm, the particle diameter of quartz sand is 0.5~1mm.
Modified active focus layer 14, the height of modified active focus layer 14 are additionally provided between air distribution plate 11 and quartz sand filtration layer 12
For 7~8cm, the particle diameter of modified active coke is 2~3mm in modified active focus layer 14.Double-layer filter material grain bed 6 collects coarse-fine two-stage ladder
Level is filtered in one, can obtain high filter efficiency and a lot of dust amount simultaneously.And add last layer below double-layer filter material particle
Modified active focus layer 14, greatly improves denitration effect.
Wherein, filter bed 10 is connected with reverse-blow pipe, for the blowback of filter bed 10, as filter layer dust is more long-pending more
More, working resistance increases to range of set value (1200~1600Pa), and PLC starts reverse gas cleaning system.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God any modification, equivalent substitution and improvements made etc., should be included in the scope of the protection with principle.
Claims (10)
- A kind of 1. flue gas desulfurization denitration dust-removing integrated system, it is characterised in that：Including be sequentially connected ICFB, remove Dirt device and double-layer filter material grain bed, the ICFB are connected with boiler fired coal flue gas inlet pipe, the boiler fired coal flue gas Inlet pipe is provided with Venturi tube with the ICFB junction, and the ICFB adds with modified active coke respectively Enter system to connect with ammonia addition system, atomizer is provided with the middle part of the ICFB, the modified active coke is It is made up of following preparation methods：Activated coke or activated carbon are taken, is soaked with sulfuric acid solution, adds coal tar, Fe2O3And Cr2O3Mixing Uniformly after shaping, dry, activate, crush under an inert atmosphere, producing.
- A kind of 2. flue gas desulfurization denitration dust-removing integrated system according to claim 1, it is characterised in that：The Fe2O3's Addition is the 5~15% of activated coke or quality of activated carbon, the Cr2O3Addition for activated coke or quality of activated carbon 5~ 15%, the addition of the coal tar is the 5~10% of activated coke or quality of activated carbon.
- A kind of 3. flue gas desulfurization denitration dust-removing integrated system according to claim 1, it is characterised in that：The activation temperature Spend for 300~700 DEG C, the soak time is 1~3 hour.
- A kind of 4. flue gas desulfurization denitration dust-removing integrated system according to claim 1, it is characterised in that：It is described modified living Property Jiao's addition system include storage bin and screw(-type) feeder, the screw(-type) feeder passes through pipeline and connected with the ICFB Connect.
- A kind of 5. flue gas desulfurization denitration dust-removing integrated system according to claim 4, it is characterised in that：The double-deck filter Material grain bed bottom is connected with regenerator, and the regenerator is connected with separator, and the separator connects with the storage bin Connect.
- A kind of 6. flue gas desulfurization denitration dust-removing integrated system according to claim 5, it is characterised in that：The regenerator It is connected with sulfur recovery system.
- A kind of 7. flue gas desulfurization denitration dust-removing integrated system according to claim 1, it is characterised in that：The double-deck filter Multiple filter beds are provided with material grain bed, the filter bed includes air distribution plate, quartz sand filtration is provided with the air distribution plate Layer, it is provided with expanded perlite filter layer on the quartz sand filtration layer.
- A kind of 8. flue gas desulfurization denitration dust-removing integrated system according to claim 7, it is characterised in that：The expansion is precious Zhu Yan particle diameter is 2~5mm, and the particle diameter of the quartz sand is 0.5~1mm.
- A kind of 9. flue gas desulfurization denitration dust-removing integrated system according to claim 7, it is characterised in that：The air distribution plate Modified active focus layer is additionally provided between the quartz sand filtration layer, the modified active coke layer height is 7~8cm, described The particle diameter of modified active coke is 2~3mm in modified active focus layer.
- A kind of 10. flue gas desulfurization denitration dust-removing integrated system according to claim 7, it is characterised in that：The filtering Bed is connected with reverse-blow pipe.
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| CN201710524742.8A CN107335327A (en) | 2017-06-30 | 2017-06-30 | A kind of flue gas desulfurization denitration dust-removing integrated system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111282343A (en) * | 2020-03-05 | 2020-06-16 | 安徽世倾环保科技有限公司 | Oxidation-resistant filter material and preparation method thereof |
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| CN103433034A (en) * | 2013-09-13 | 2013-12-11 | 国电环境保护研究院 | Low-temperature SCR (Selective Catalytic Reduction) catalyst based on active coke loaded manganese-cerium composite oxide and preparation method of low-temperature SCR catalyst |
| CN105695754A (en) * | 2014-11-27 | 2016-06-22 | 江苏康洁环境工程有限公司 | Method and device for removing NOX, SOX, dioxins and heavy metals from leaded exhaust gas as well as recovering lead dust |
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2017
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| CN1911491A (en) * | 2006-08-03 | 2007-02-14 | 长春惠工净化工业有限公司 | Moving bed smoke desulfur denitrate and dust removal technology |
| CN101767041A (en) * | 2009-07-06 | 2010-07-07 | 王向明 | Preparation method of flue gas denitration catalyst |
| CN103433034A (en) * | 2013-09-13 | 2013-12-11 | 国电环境保护研究院 | Low-temperature SCR (Selective Catalytic Reduction) catalyst based on active coke loaded manganese-cerium composite oxide and preparation method of low-temperature SCR catalyst |
| CN105695754A (en) * | 2014-11-27 | 2016-06-22 | 江苏康洁环境工程有限公司 | Method and device for removing NOX, SOX, dioxins and heavy metals from leaded exhaust gas as well as recovering lead dust |
| CN105727708A (en) * | 2016-02-29 | 2016-07-06 | 中国科学院过程工程研究所 | Multi-layer fluidized bed two-stage activated carbon/coke flue gas simultaneous-desulfurization and denitrification system and method |
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| CN111282343A (en) * | 2020-03-05 | 2020-06-16 | 安徽世倾环保科技有限公司 | Oxidation-resistant filter material and preparation method thereof |
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Application publication date: 20171110 |