CN108339390A - A kind of fractional order reaction high-efficiency desulfurization collaboration dedusting absorption tower - Google Patents
A kind of fractional order reaction high-efficiency desulfurization collaboration dedusting absorption tower Download PDFInfo
- Publication number
- CN108339390A CN108339390A CN201710046513.XA CN201710046513A CN108339390A CN 108339390 A CN108339390 A CN 108339390A CN 201710046513 A CN201710046513 A CN 201710046513A CN 108339390 A CN108339390 A CN 108339390A
- Authority
- CN
- China
- Prior art keywords
- absorption tower
- uptake zone
- flue gas
- spraying layer
- absorption
- 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.)
- Pending
Links
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 50
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 25
- 230000023556 desulfurization Effects 0.000 title claims abstract description 21
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 11
- 239000003546 flue gas Substances 0.000 claims abstract description 33
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000002002 slurry Substances 0.000 claims abstract description 20
- 238000005507 spraying Methods 0.000 claims abstract description 20
- 235000019738 Limestone Nutrition 0.000 claims abstract description 5
- 239000006028 limestone Substances 0.000 claims abstract description 5
- 239000000779 smoke Substances 0.000 abstract description 9
- 238000005516 engineering process Methods 0.000 abstract description 8
- 230000003009 desulfurizing effect Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 4
- 239000010440 gypsum Substances 0.000 abstract description 3
- 229910052602 gypsum Inorganic materials 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 11
- 239000007788 liquid Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 239000000428 dust Substances 0.000 description 5
- 239000003500 flue dust Substances 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 239000007921 spray Substances 0.000 description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- GBAOBIBJACZTNA-UHFFFAOYSA-L calcium sulfite Chemical compound [Ca+2].[O-]S([O-])=O GBAOBIBJACZTNA-UHFFFAOYSA-L 0.000 description 2
- 235000010261 calcium sulphite Nutrition 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- 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
- B01D53/80—Semi-solid phase processes, i.e. by using slurries
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
-
- 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
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/502—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Treating Waste Gases (AREA)
Abstract
A kind of fractional order reaction high-efficiency desulfurization collaboration dedusting absorption tower, is related to the lime stone gypsum wet flue gas desulfurizing technique of environmental protection technical field.The lower part on absorption tower of the present invention is absorption tower stock tank, and the top on absorption tower is equipped with high efficiency demister, and top exports for absorption tower.It is structurally characterized in that, first order absorption area and two level uptake zone are respectively provided with from bottom to up in its inner cavity, above smoke inlet.First order absorption area include be placed in bottom stream pallet and its above spraying layer one, two level uptake zone include be placed in bottom again stream pallet and its above spraying layer two.Compared with the existing technology, apparatus of the present invention not only can the short flow problem of effective solution flue gas, improve flue gas flow field uniformity, and the pH value of uptake zone slurries can be improved, extend high pH slurries and smoke contacts time, effectively promotion absorption tower desulfuration efficiency.
Description
Technical field
The present invention relates to the wet desulfurization of flue gas by limestone-gypsum method technique of environmental protection technical field, especially classification are anti-
High-efficiency desulfurization is answered to cooperate with dedusting absorption tower.
Background technology
In recent years, many urban atmospheric pollutions in China are serious, and especially haze meteorological disaster takes place frequently, and it is strong to seriously endanger the mankind
Health and existence.For this purpose, relevant government department has formulated a series of law, regulation, and some areas then put into effect it is more stringent
Atmosphere pollution Prevention Plans, it is desirable that it is newly-built, the ultra-clean draining technology of flue gas must be used building fired power generating unit, existing 600,000 kilowatts
The above fired power generating unit is basically completed the ultra-clean draining technology transformation of flue gas, reaches the requirement of Gas Generator Set discharge standard(SO2< 35mg/
Nm3, flue dust< 5mg/Nm3, NOx<50mg/Nm 3), realize ultra-clean discharge.
Contain a large amount of SO in coal-fired flue-gas2, flue dust, also contain a small amount of HC1, HF, SO3, the pollutants such as heavy metal, mesh
It is wet fuel gas desulfurizing technology that preceding flue gas desulfurization, which uses at most,.Lime stone-gypsum desulfurization in wet method, technology maturation, fortune
Row is stablized, and is that most sulfur removal technologies is applied in the world today.In the prior art, the desulfurizing tower that ultra-clean draining technology uses uses
The form of spray column, reflux type arrangement.Flue gas is entered from slurry pool top in absorption tower by absorption tower entrance, is passed sequentially through
After pallet, spraying layer, demister, through smoke stack emission.Pallet, which is formed by, holds point that the drag of liquid layer generation keeps flue gas uniform
Cloth is in tower section.Flue gas passes through gas-liquid close contact when holding liquid layer, generates strong eddy diffusivity and molecule diffusion, realizes SO2
Absorption and dust removing.Slurries are sprayed by the multiple nozzles of each spraying layer, are moved downward, and are contacted with flue gas adverse current and physics occurs
And chemical action, washing removing is carried out to the sulfur dioxide in flue gas, while occurring between the dust particles and drop in air-flow
The effects that inertial collision, interception, diffusion, cohesion and gravitational settling, dust is made to be captured.Slurries are from the SO in flue gas2, flue dust
And desulfurizing tower hypomere stock tank is fallen into after other pollutants, and it is forced oxidation, crystallization in stock tank.
It is above-mentioned in the prior art, in desulfurizing tower that flue gas flow field is uneven and the short stream of flue gas is influences smoke desulfurization efficiency and remove
An important factor for dirt effect.In Practical Project, the nozzle of uptake zone spraying layer, which is difficult to, to be completely evenly arranged, and office will be caused
Short stream occurs for portion's flue gas.The flue gas of short stream will pass quickly through uptake zone, cannot carry out sufficient mass transfer, SO with slurries2Absorb effect
Fruit is poor.Untreated flue gas SO2Dense, the flue gas of a small amount of short stream will seriously reduce desulfuration efficiency.In addition, flue gas passes through pallet
Hold liquid layer it is uniformly distributed after enter uptake zone, a large amount of nozzle in uptake zone, spraying layer pipeline, spraying layer supporting beam inhibition make
Flue gas flow field is inhomogenous.
Slurry pH value is normally controlled in 5.2 ~ 6.0 in absorption tower, to meet uptake zone SO simultaneously2Absorption and stock tank area it is sub-
The oxidation of calcium sulfate.Lower pH contributes to the oxidation of stock tank area calcium sulfite, but is unfavorable for SO2Absorption, desulfurization will be caused
Efficiency reduces;Higher pH contributes to SO2Absorption, but be unfavorable for the oxidation of stock tank area calcium sulfite, scale problems will be caused.
Above-mentioned absorption tower structure in the prior art can not regulate and control pH value well, influence the desulfuration efficiency on absorption tower.
Invention content
To solve the above-mentioned problems of the prior art, the purpose of the present invention is to provide a kind of fractional order reaction high-efficiency desulfurizations
Cooperate with dedusting absorption tower.The device not only can the short flow problem of effective solution flue gas, improve flue gas flow field uniformity, and can carry
The pH value of high absorbing area slurries extends high pH slurries and smoke contacts time, effectively promotes absorption tower desulfuration efficiency.
In order to achieve the above-mentioned object of the invention, technical scheme of the present invention is realized as follows:
The lower part of a kind of fractional order reaction high-efficiency desulfurization collaboration dedusting absorption tower, absorption tower is absorption tower stock tank, the top on absorption tower
It is equipped with high efficiency demister, top exports for absorption tower.It is structurally characterized in that, in its inner cavity, above smoke inlet from bottom to up
It is respectively provided with first order absorption area and two level uptake zone.First order absorption area includes the stream pallet for being placed in bottom and the spray above it
Drenching layer one, two level uptake zone include be placed in bottom again stream pallet and its above spraying layer two.
In above-mentioned absorption tower, the spraying layer one in the first order absorption area is 2 ~ 3 floor, and the spraying layer two of two level uptake zone is
1 ~ 2 layer.
In above-mentioned absorption tower, lime is added at two inlet duct of circulating pump that two level uptake zone spraying layer two connects
Stone slurries.
Compared with prior art, fractional order reaction high-efficiency desulfurization collaboration dedusting and desulfurizing tower provided by the invention has following spy
Point:
(1)Two layers of stream pallet has blocked the short flow path of flue gas due to the uneven generation of the arrangement of nozzles of spraying layer.Level-one is inhaled
Receive the high concentration SO of the short stream in area2Flue gas again through two level uptake zone again stream pallet hold liquid layer re-mix uniformly after, into two
Realize high-efficiency desulfurization in grade uptake zone.
(2)Passing through the flue gas of two-stage uptake zone successively can be further evenly distributed with.
(3)Lime stone slurry is added on corresponding two inlet duct of circulating pump in two level uptake zone so that the pH of sprayed slurry
Between 5.4 ~ 6.5, SO is significantly improved2Assimilation effect.
(4)The higher pH slurries in two level uptake zone again flow pallet on formed hold liquid layer, extend high pH slurries and flue gas
Time of contact realizes high-efficiency desulfurization and dust cooperation-removal.
The present invention will be further described with reference to the accompanying drawings and detailed description.
Description of the drawings
Fig. 1 is schematic structural view of the invention.
Specific implementation mode
Referring to Fig. 1, it is absorption tower stock tank 11 that fractional order reaction high-efficiency desulfurization of the present invention, which cooperates with dedusting absorption tower, its lower part,
Its top is equipped with high efficiency demister 9, and top is that absorption tower exports 10.In the inner cavity on absorption tower, the top of smoke inlet 1 from down toward
On be respectively provided with first order absorption area and two level uptake zone.First order absorption area includes stream pallet 5 and its top for being placed in bottom
2 ~ 3 layers of spraying layer 1, two level uptake zone include be placed in bottom again stream pallet 7 and its above 1 ~ 2 layer of spraying layer
28.Lime stone slurry is added at 22 inlet duct of circulating pump that two level uptake zone spraying layer 28 connects.
The present invention flows pallet 7 again first order absorption area and two level uptake zone intermediate arrangement, it has been blocked due to spray
The short flow path of flue gas of the uneven generation of layer arrangement.The high concentration SO of the short stream in first order absorption area2Flue gas holds liquid through stream pallet 7 again
After layer re-mixes uniformly, high-efficiency desulfurization is realized into two level uptake zone.Become uneven by the flue gas flow field in first order absorption area
One, then stream pallet 7 can be evenly distributed with flue gas again.The corresponding pump entry pipeline in two level uptake zone is added in lime stone slurry
On so that the pH of sprayed slurry significantly improves SO between 5.4 ~ 6.52Assimilation effect.The higher pH slurries in two level uptake zone exist
Liquid layer is held in the formation of stream pallet 7 again, extends high pH slurries and smoke contacts time, realizes that high-efficiency desulfurization and dust collaboration are de-
It removes.
Dedusting absorption tower is cooperateed with using aforementioned present invention fractional order reaction high-efficiency desulfurization, purifying smoke, experiment card can be segmented
It is bright to reach the requirement of Gas Generator Set discharge standard(SO2< 35mg/ Nm3, flue dust< 5mg/Nm3), realize ultra-clean discharge.
Claims (3)
1. a kind of fractional order reaction high-efficiency desulfurization cooperates with dedusting absorption tower, absorption tower(4)Lower part be absorption tower stock tank(11), absorb
Tower(4)Top be equipped with high efficiency demister(9), top exports for absorption tower(10);It is characterized in that, in its inner cavity, flue gas
Entrance(1)Top is respectively provided with first order absorption area and two level uptake zone from bottom to up, and first order absorption area includes being placed in bottom
Flow pallet(5)With the spraying layer one above it(6), two level uptake zone include be placed in bottom flow pallet again(7)Thereon
The spraying layer two of side(8).
2. fractional order reaction high-efficiency desulfurization according to claim 1 cooperates with dedusting absorption tower, which is characterized in that the level-one is inhaled
Receive the spraying layer one in area(6)It is 2 ~ 3 layers, the spraying layer two of two level uptake zone(8)It is 1 ~ 2 layer.
3. fractional order reaction high-efficiency desulfurization according to claim 1 or 2 cooperates with dedusting absorption tower, which is characterized in that described two
Grade uptake zone spraying layer two(8)The circulating pump two of connection(2)Lime stone slurry is added at inlet duct.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN201710046513.XA CN108339390A (en) | 2017-01-22 | 2017-01-22 | A kind of fractional order reaction high-efficiency desulfurization collaboration dedusting absorption tower |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN201710046513.XA CN108339390A (en) | 2017-01-22 | 2017-01-22 | A kind of fractional order reaction high-efficiency desulfurization collaboration dedusting absorption tower |
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CN108339390A true CN108339390A (en) | 2018-07-31 |
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CN201710046513.XA Pending CN108339390A (en) | 2017-01-22 | 2017-01-22 | A kind of fractional order reaction high-efficiency desulfurization collaboration dedusting absorption tower |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108905580A (en) * | 2018-08-13 | 2018-11-30 | 中国华电集团科学技术研究总院有限公司 | A kind of wet desulfuration tower configuring ridge type pallet |
CN110368792A (en) * | 2019-08-19 | 2019-10-25 | 北京首钢国际工程技术有限公司 | A kind of double tower Two-way Cycle wet desulphurization device for wearing series-parallel flue |
CN111054169A (en) * | 2019-12-27 | 2020-04-24 | 浙江德创环保科技股份有限公司 | Deep dedusting and demisting system for wet desulphurization |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN2546078Y (en) * | 2002-05-15 | 2003-04-23 | 中国石油化工股份有限公司 | Laminated spray cleaning gas treating apparatus |
US20040079235A1 (en) * | 2002-10-24 | 2004-04-29 | Vrotsos Jeffery J. | Flue gas desulfurization system with a stepped tray |
CN204841409U (en) * | 2015-07-21 | 2015-12-09 | 武汉凯迪电力环保有限公司 | High -efficient gradual change is compound desulfurizing tower in grades |
CN105617852A (en) * | 2016-03-28 | 2016-06-01 | 上海龙净环保科技工程有限公司 | Desulfurization and dedusting absorption tower with porous current equalizer |
CN205495319U (en) * | 2016-03-30 | 2016-08-24 | 西安西热锅炉环保工程有限公司 | Wet flue gas desulfurization is in coordination with removing dust absorption tower |
-
2017
- 2017-01-22 CN CN201710046513.XA patent/CN108339390A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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CN2546078Y (en) * | 2002-05-15 | 2003-04-23 | 中国石油化工股份有限公司 | Laminated spray cleaning gas treating apparatus |
US20040079235A1 (en) * | 2002-10-24 | 2004-04-29 | Vrotsos Jeffery J. | Flue gas desulfurization system with a stepped tray |
CN204841409U (en) * | 2015-07-21 | 2015-12-09 | 武汉凯迪电力环保有限公司 | High -efficient gradual change is compound desulfurizing tower in grades |
CN105617852A (en) * | 2016-03-28 | 2016-06-01 | 上海龙净环保科技工程有限公司 | Desulfurization and dedusting absorption tower with porous current equalizer |
CN205495319U (en) * | 2016-03-30 | 2016-08-24 | 西安西热锅炉环保工程有限公司 | Wet flue gas desulfurization is in coordination with removing dust absorption tower |
Non-Patent Citations (1)
Title |
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张磊,张立华, 中国电力出版社 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108905580A (en) * | 2018-08-13 | 2018-11-30 | 中国华电集团科学技术研究总院有限公司 | A kind of wet desulfuration tower configuring ridge type pallet |
CN108905580B (en) * | 2018-08-13 | 2024-03-19 | 中国华电集团科学技术研究总院有限公司 | Wet desulfurization tower provided with ridge type tray |
CN110368792A (en) * | 2019-08-19 | 2019-10-25 | 北京首钢国际工程技术有限公司 | A kind of double tower Two-way Cycle wet desulphurization device for wearing series-parallel flue |
CN111054169A (en) * | 2019-12-27 | 2020-04-24 | 浙江德创环保科技股份有限公司 | Deep dedusting and demisting system for wet desulphurization |
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Application publication date: 20180731 |