CN110523261A - Flue gas desulphurization system - Google Patents
Flue gas desulphurization system Download PDFInfo
- Publication number
- CN110523261A CN110523261A CN201910930694.1A CN201910930694A CN110523261A CN 110523261 A CN110523261 A CN 110523261A CN 201910930694 A CN201910930694 A CN 201910930694A CN 110523261 A CN110523261 A CN 110523261A
- Authority
- CN
- China
- Prior art keywords
- tower
- flue gas
- tower body
- desulphurization system
- gas desulphurization
- 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.)
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Links
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 53
- 239000003546 flue gas Substances 0.000 title claims abstract description 53
- 239000002002 slurry Substances 0.000 claims abstract description 85
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 69
- 230000001590 oxidative effect Effects 0.000 claims abstract description 65
- 238000005273 aeration Methods 0.000 claims abstract description 34
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims abstract description 32
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims abstract description 31
- 235000011130 ammonium sulphate Nutrition 0.000 claims abstract description 31
- 238000004064 recycling Methods 0.000 claims abstract description 6
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 3
- 238000005507 spraying Methods 0.000 claims description 50
- 239000007921 spray Substances 0.000 claims description 43
- 239000007788 liquid Substances 0.000 claims description 30
- 238000006477 desulfuration reaction Methods 0.000 claims description 26
- 230000023556 desulfurization Effects 0.000 claims description 25
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 22
- 238000006243 chemical reaction Methods 0.000 claims description 22
- 239000002562 thickening agent Substances 0.000 claims description 20
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 17
- 229910052760 oxygen Inorganic materials 0.000 claims description 17
- 239000001301 oxygen Substances 0.000 claims description 17
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 16
- 239000000908 ammonium hydroxide Substances 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 229910021529 ammonia Inorganic materials 0.000 claims description 11
- 239000012530 fluid Substances 0.000 claims description 11
- 239000007789 gas Substances 0.000 claims description 10
- 238000002360 preparation method Methods 0.000 claims description 10
- BIGPRXCJEDHCLP-UHFFFAOYSA-N ammonium bisulfate Chemical compound [NH4+].OS([O-])(=O)=O BIGPRXCJEDHCLP-UHFFFAOYSA-N 0.000 claims description 8
- 239000012452 mother liquor Substances 0.000 claims description 7
- 230000001376 precipitating effect Effects 0.000 claims description 5
- 239000004744 fabric Substances 0.000 claims 1
- 239000000779 smoke Substances 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 230000003647 oxidation Effects 0.000 abstract description 5
- 238000007254 oxidation reaction Methods 0.000 abstract description 5
- 239000003517 fume Substances 0.000 abstract description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 abstract 1
- PQUCIEFHOVEZAU-UHFFFAOYSA-N Diammonium sulfite Chemical compound [NH4+].[NH4+].[O-]S([O-])=O PQUCIEFHOVEZAU-UHFFFAOYSA-N 0.000 description 17
- 235000011114 ammonium hydroxide Nutrition 0.000 description 15
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 239000000243 solution Substances 0.000 description 8
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- 239000013078 crystal Substances 0.000 description 6
- 239000013589 supplement Substances 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000005864 Sulphur Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 238000012870 ammonium sulfate precipitation Methods 0.000 description 2
- 235000019504 cigarettes Nutrition 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004176 ammonification Methods 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- TXKMVPPZCYKFAC-UHFFFAOYSA-N disulfur monoxide Inorganic materials O=S=S TXKMVPPZCYKFAC-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 230000003020 moisturizing effect Effects 0.000 description 1
- 238000006213 oxygenation reaction Methods 0.000 description 1
- 230000003389 potentiating effect Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 230000002335 preservative effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 239000002351 wastewater Substances 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
- B01D53/46—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
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/24—Sulfates of ammonium
-
- 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
-
- 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)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
The present invention provides a kind of flue gas desulphurization systems, are related to the technical field of fume treatment auxiliary, including desulfurizing tower, and desulfurizing tower includes tower body, and tower body bottom is provided with concentration basin；The first air aeration layer is equipped in the concentration basin of tower body, the first air aeration layer is for being aerated the slurries in concentration basin；Flue gas desulphurization system further includes oxidizing tower, and oxidizing tower is connected to tower body, and the slurries of recycling are re-fed into tower body after oxidizing tower slurries, the second air aeration layer is equipped in oxidizing tower, the second air aeration layer is for being aerated the slurries in oxidizing tower.Solve smoke components fluctuation it is larger when, not can guarantee the high-efficient technical problem of sulfite oxidation, reached improve ammonium sulfate formation efficiency technical effect.
Description
Technical field
The present invention relates to the technical fields of fume treatment auxiliary, more particularly, to a kind of flue gas desulphurization system.
Background technique
Power plants and the flue gas of steel mill discharge contain a large amount of SOn, with the deterioration of environment, the discharge of China's atmosphere
Standard it is more stringent, for control SOn discharge, various desulfurizers application it is more universal.The ammonia process of desulfurization is to utilize amino
Absorbent (ammonium hydroxide or urea etc.) absorbs SO2 in flue gas and generates the processes of ammonium sulfate solids.Ammonia desulfurizing process has
Following advantages: amino desulfurizer activity is strong, and reaction rate is fast, and sulfur dioxide absorption is high-efficient, and liquid-gas ratio is low, and equipment is simple, energy
The advantages that consuming low, by-product (ammonium sulfate) high financial profit, not generating waste water.
Ammonia method desulfurizing system is broadly divided into compound single column formula and prewashing+desulfurization double-tower type at present, and main technique is to utilize Asia
Ammonium bisulfate solution absorbs the sulfur dioxide in flue gas, forms ammonium sulfite solution, then by blasting oxidation air, form sulfuric acid
Ammonium salt solution, while injecting the absorbability that ammonium hydroxide keeps solution.General desulfurization slurry is divided into concentrated slurry and desulfurization slurry, the former
Main function is to provide raw material to flue gas cool-down, evaporation water, for sulfuric acid preparation, does not have desulphurizing ability；The latter's main function
It is desulfurization.
The problem of ammonia method desulfurizing system is primarily present at present has: when smoke components fluctuation is larger, can generate in tower body a large amount of
Ammonium sulfite, part ammonium sulfite can not generate ammonium sulfate, and the easy deposit buildup of ammonium sulfite blocks tower body.
Summary of the invention
The purpose of the present invention is to provide flue gas desulphurization systems, to alleviate smoke components fluctuation existing in the prior art
When larger, a large amount of ammonium sulfite can be generated in tower body, part ammonium sulfite can not generate ammonium sulfate, and ammonium sulfite easily precipitates heap
The technical issues of product blocking tower body.
Flue gas desulphurization system provided by the invention, including desulfurizing tower, the desulfurizing tower include tower body, and the tower body bottom is set
It is equipped with concentration basin；The first air aeration layer is equipped in the concentration basin of the tower body, the first air aeration layer is used for described
Slurries in concentration basin are aerated；The flue gas desulphurization system further includes oxidizing tower, and the oxidizing tower is connected to the tower body,
The slurries of recycling are re-fed into the tower body after the oxidizing tower slurries, and the second air aeration is equipped in the oxidizing tower
Layer, the second air aeration layer is for being aerated the slurries in oxidizing tower.
Further, the concentration bottom of pond portion of the tower body is equipped with buildup plate；
The buildup plate is located at the bottom of the first air aeration layer, and the buildup plate in the concentration bottom of pond portion by separate
The side of the outlet of buildup discharge one is sloped downwardly setting to the outlet for being equipped with buildup discharge.
Further, pusher is connected on the tower body, pusher end and the outlet of the pusher are correspondingly arranged, institute
Stating pusher can extend into inside the tower body, and can act in the buildup of buildup plate, to push the buildup on buildup plate.
Further, the oxidizing tower includes slurry pool；
The slurry pool is located at the lower section of the second air aeration layer, and the slurry pool is connected to the concentration basin, uses
In supplementing slurries into the concentration basin.
Further, the circumferential direction of the concentration basin of the tower body is equipped with multiple fluid jet spray guns being arranged successively, for dense
Slurries in contracting pond are stirred；
Multiple fluid jet spray guns being arranged successively also are provided in the circumferential direction of the slurry pool of the oxidizing tower, for in oxidizing tower
Slurries be stirred.
Further, it is provided with crystallized region in the tower body, conversion zone, spray section, captures section and demisting section；
The crystallized region, conversion zone, spray section, capture section and demisting section are set gradually from the bottom to top in the tower body,
The crystallized region includes concentration basin and the first air aeration layer, and for the precipitating of ammonium sulfate, the conversion zone is anti-for desulfurization
It answers, the spray section is used for sprayed slurry, and the ammonia for capturing section and being used to capture escape, the demisting section is for going water removal to steam
Gas.
Further, the spray section includes the first grade desulfurizing spraying layer being sequentially arranged from the bottom to top, first grade desulfurizing liquid collecting
Disk, two-grade desulfurizing spraying layer and three-level desulfurization spraying layer；
The concentration basin is connect with first grade desulfurizing spraying layer, for the slurries in concentration basin to be carried out secondary treatment；It is described
First grade desulfurizing catch tray is connect with oxidizing tower, for the buildup of the collection on first grade desulfurizing catch tray to be delivered in oxidizing tower；
The oxidizing tower is connect with two-grade desulfurizing spraying layer, for oxygen to be passed into spray section；The slurry pool of the oxidizing tower with
The connection of three-level desulfurization spraying layer, slurries are sent in the spray section.
Further, the flue gas desulphurization system further includes liquid collecting tank, and the capture section includes trapping layer, the trapping layer
Including catch tray and capture spraying layer；
The catch tray is set gradually with capture spraying layer along tower body inner wall from the bottom to top, the catch tray and the capture
Spraying layer is connected by liquid collecting tank, and the liquid collecting tank is connected to the oxidizing tower.
Further, the quantity of the liquid collecting tank is multiple, and the quantity of the trapping layer is multiple；
It is connected in series between multiple trapping layer.
Further, the demisting section includes multiple demisters；
Multiple demisters are set gradually from the bottom to top along the inner wall of tower body.
Further, the flue gas desulphurization system further includes water tank；
The water tank is connected to multiple demisters.
Further, the flue gas desulphurization system further includes ammonium hydroxide transport portion；
The ammonium hydroxide transport portion respectively with the slurry pool of the oxidizing tower, the upper end of the oxidizing tower, the desulfurizing tower
Concentration basin, the desulfurizing tower two-grade desulfurizing spraying layer and the desulfurizing tower three-level desulfurization spraying layer connection.
Further, the flue gas desulphurization system further includes ammonium sulfate preparation part；
Ammonium sulfate preparation part is connected to the outlet of tower body.
Further, ammonium sulfate preparation part includes from top to bottom sequentially connected level-one spiral board thickener, two
Grade spiral board thickener, centrifuge, drier and collecting tank；The level-one spiral board thickener and second level spiral board thickener and
The discharge liquor of centrifuge is connected to mother liquor tank；The mother liquor tank is connect with the conversion zone of the tower body.
The desulfurizing tower of flue gas desulphurization system provided by the invention includes tower body, and the bottom of the tower body is equipped with concentration basin, real
Now to the deposition of ammonium sulfate；The first air aeration layer is equipped in the concentration basin of the tower body, the first air aeration layer is used for
Slurries in the concentration basin are aerated；The flue gas desulphurization system further includes oxidizing tower, the oxidizing tower and the tower
Body connection, the slurries of recycling are re-fed into the tower body after the oxidizing tower slurries, and it is empty that second is equipped in the oxidizing tower
Gas is aerated layer, and the second air aeration layer is for being aerated the slurries in oxidizing tower.Slurries with after smoke reaction by collecting
The slurries that liquid disk is collected are before entering desulfurizing tower, first in oxidizing tower after the second air aeration layer is aerated and aoxidizes, then
It is delivered in the tower body of desulfurizing tower and carries out secondary Air Exposure, so that the slurries in concentration basin have passed through and be aerated twice, concentration basin
Interior slurries oxygen concentration is higher, and the ammonium sulfite in concentration basin can more be oxidized to ammonium sulfate, and ammonia sulfate crystal output increases
More, ammonium sulfite generation is less, reduces a possibility that ammonium sulfite is accumulated in tower body.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of flue gas desulphurization system provided in an embodiment of the present invention；
Fig. 2 is that the oxidizing tower of flue gas desulphurization system provided in an embodiment of the present invention is equipped with the structural representation of injection stream rifle
Figure；
Fig. 3 is the structural schematic diagram of the injection stream rifle of flue gas desulphurization system provided in an embodiment of the present invention；
Fig. 4 is another structural schematic diagram of the desulfurizing tower of flue gas desulphurization system provided in an embodiment of the present invention.
Icon: 100- tower body；200- oxidizing tower；300- liquid collecting tank；400- water tank；500- ammonium hydroxide transport portion；600- sulphur
Sour ammonium prepares part；700- fluid jet spray gun；101- concentration basin；102- gas inlet；103- exhanst gas outlet；The first air of 104- exposes
Gas-bearing formation；105- buildup plate；106- crystallized region；107- conversion zone；108- spray section；109- captures section；110- demisting section；111- mono-
Grade desulfurization spraying layer；112- first grade desulfurizing catch tray；113- two-grade desulfurizing spraying layer；114- three-level desulfurization spraying layer；115- collection
Liquid disk；116- captures spraying layer；117- demister；118- outlet；201- the second air aeration layer；202- slurry pool；601-
Level-one spiral board thickener；602- second level spiral board thickener；603- centrifuge；604- drier；605- collecting tank；606- is female
Flow container.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with embodiment, it is clear that described reality
Applying example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, the common skill in this field
Art personnel every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
In the description of the present invention, it should be noted that such as occur term " center ", "upper", "lower", "left", "right",
The orientation or positional relationship of the instructions such as "vertical", "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings,
Be merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must have it is specific
Orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.In addition, such as there is term "
One ", " second ", " third " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " peace such as occur
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
The concrete meaning of language in the present invention.
The present invention provides a kind of flue gas desulphurization systems, as shown in Figure 1, the flue gas desulphurization system includes desulfurizing tower, institute
Stating desulfurizing tower includes tower body 100, and the bottom of the tower body 100 is provided with concentration basin 101, and the middle part of the tower body 100 is equipped with cigarette
The top of gas import 102, the tower body 100 is equipped with exhanst gas outlet 103；The flue gas desulphurization system further includes oxidizing tower 200；Institute
It states and is equipped with the first air aeration layer 104 in the concentration basin 101 of tower body 100, the first air aeration layer 104 passes through oxidation fan
Oxygen supply, so that the oxygen in air increases the oxygen concentration in concentration basin 101, improve sulfuric acid well into arriving in concentration basin 101
The output of ammonium；The second air aeration layer 201, the middle part of the oxidizing tower 200 and tower body 100 are equipped in the oxidizing tower 200
Connection, the second air aeration layer 201 are used to for oxygen being sent into oxidizing tower 200, the second air aeration layer in oxidizing tower 200
201 oxygen and slurries can be also passed into tower body 100, wherein the oxygen of the second air aeration layer 201 passes through oxidation fan
Oxygen supply, enables to the oxygen concentration in concentration basin 101 higher, improves the output of ammonium sulfate, so that the flue gas in tower body 100
No matter can adequately be reacted, the ammonium sulfite of generation can be oxidized generation sulphur in great concentration range
Sour ammonium avoids the occurrence of the phenomenon that ammonium sulfite is accumulated in tower body 100；That is, collected after slurries and smoke reaction by catch tray
Slurries first in oxidizing tower 200 after the second air aeration layer 201 is aerated and aoxidizes, then convey before entering desulfurizing tower
Secondary Air Exposure is carried out in the tower body 100 of desulfurizing tower, so that the slurries in concentration basin 101 have passed through and be aerated twice, concentration
Slurries oxygen concentration in pond 101 is higher, and the ammonium sulfite in concentration basin 101 can more be oxidized to ammonium sulfate, and ammonium sulfate is brilliant
Body output increases, and ammonium sulfite generation is less, reduces a possibility that ammonium sulfite is accumulated in tower body 100.
Further, as shown in Figure 1, the bottom of the concentration basin 101 of the tower body 100 is equipped with buildup plate 105, the buildup
Plate 105 is located at the bottom of the first air aeration layer 104, and as shown in Figure 1, buildup plate 105 is set by right side to left side towards tower bottom
It sets, outlet 118 is located at the left side of tower body 100, enables the ammonium sulfate for being deposited on buildup plate 105 along buildup plate 105 in weight
Tower body 100 is discharged under the action of power；Be arranged buildup plate 105 be it is inclined, facilitate the discharge of ammonia sulfate crystal, ammonium sulfate avoided to exist
The large area of 100 bottom of tower body is accumulated；That is, the width of buildup plate 105 is identical as the diameter of tower body 100, a left side for buildup plate 105
End and the outlet 118 of tower body 100 are in the same direction, guarantee that precipitating flows at the outlet 118 of tower body 100 naturally by gravity in slurries,
Reduce the accumulation in concentration basin 101, it is convenient that ammonium sulfate is delivered in subsequent process in time.
It should be noted that the bottom on the right side of the buildup plate 105 is equipped with supporting element, it can guarantee buildup plate 105
The presence of tilt angle, furthermore, the upper surface of buildup plate 105 has carried out preservative treatment, avoids the corrosion to ammonia sulfate crystal.
It should also be noted that, supporting element is supporting block or support plate.
Further, pusher is connected on the tower body 100, the pusher end of the pusher is corresponding with outlet 118
Setting, can extend into inside the tower body 100, and can act in the buildup of buildup plate 105, to push on buildup plate 105
Buildup, avoid buildup from pushing away product on buildup plate 105.
It should be noted that the pusher is located on the right side of tower body 100, the pusher can be cylinder, cylinder
Cylinder rod acted in buildup far from one end of cylinder, and the inclined direction one of the inclined direction of cylinder rod and buildup plate 105
It causes, realizes the promotion to buildup on buildup plate 105.
Specifically, it can be provided with through-hole on the right side of tower body 100, is equipped with the position of through-hole in the lateral wall of tower body 100
Locate mounting flange, cylinder rod passes through through-hole and extend into inside tower body 100, and cylinder is fixedly connected by flange with tower body 100, realizes
With the connection of tower body 100.
As shown in Figure 1, the oxidizing tower 200 includes slurry pool 202, the slurry pool 202 is located at the second air aeration layer
201 lower section, the slurry pool 202 is connected to by the pump housing with concentration basin 101, for supplementing slurries into concentration basin 101.
Further, the circumferential direction of the concentration basin 101 of the tower body 100 is equipped with multiple fluid jet spray guns 700 being arranged successively,
Fluid jet spray gun 700 realizes the stirring to slurries in concentration basin 101, keeps the slurries in concentration basin 101 more uniform, prevents ammonium sulfate
The generation of precipitating；As shown in Fig. 2, also being provided with multiple jet streams being arranged successively in the circumferential direction of the slurry pool 202 of the oxidizing tower 200
Spray gun 700, fluid jet spray gun 700 realize the stirring to slurries in slurry pool 202, keep the slurries in slurry pool 202 more uniform, prevent
The only generation of ammonium sulfate precipitation.
It should be noted that the fluid jet spray gun 700 can be set to the structure for capableing of up and down adjustment along the vertical direction, specifically
Up and down adjustment structure can be set into support in the prior art be liftable structure.
It should also be noted that, guarantee is to concentration basin as shown in Fig. 2, the quantity of fluid jet spray gun 700 can be set to four
The slurries of all directions in 101 and in slurry pool 202 are sufficiently stirred.
Specifically, as shown in figure 3, the fluid jet spray gun 700 is spray gun in the prior art.
As shown in Figure 1, including the crystallized region 106 set gradually from the bottom to top, conversion zone 107, spray in the tower body 100
Section 108 captures section 109 and demisting section 110；Wherein, crystallized region 106 is concentration basin 101, the precipitating for ammonium sulfate；It is described anti-
Reaction of the section 107 for sulfur dioxide, ammonium hydroxide and oxygen is answered, the spray section 108 is used for the spray of slurries, the capture section
109 for capturing the ammonium hydroxide of escape, and the demisting section 110 realizes the desulfurization to flue gas for removing vapor.
It should be noted that as shown in figure 4, the concentration basin 101 of the tower body 100, the i.e. sectional area of conversion zone 107 can increase
Greatly, originally spray section 108 captures section 109 and the sectional area of demisting section 110 is constant, at this point, forming taper in conversion zone 107
Section, can decline the whole height of tower body 100, and the contact area of air and slurries increases, so that ammonium sulfate is preferably precipitated.
Specifically, as shown in Figure 1, the supreme first grade desulfurizing spraying layer being sequentially arranged under including in the spray section 108
111, first grade desulfurizing catch tray 112, two-grade desulfurizing spraying layer 113 and three-level desulfurization spraying layer 114；The first grade desulfurizing spraying layer
111 are connected with concentration basin 101 by pump, and the ammonium sulfite in concentration basin 101 is sent in first grade desulfurizing spraying layer 111 by pump,
By the spray of first grade desulfurizing spraying layer 111, so that ammonium hydroxide and oxygen in the conversion zone 107 of ammonium sulfite and tower body 100 are again
It is secondary to be reacted, ammonium sulfate is generated, guarantees the abundant precipitation of ammonia sulfate crystal；The two-grade desulfurizing spraying layer 113 passes through the pump housing
It is connect with oxidizing tower 200, the oxygen in oxidizing tower 200 is passed into spray section 108, realization sufficiently makes oxygen
With；The three-level desulfurization spraying layer 114 is connected to by the pump housing with the slurry pool 202 of oxidizing tower 200, slurries is sent to described
In spray section 108, guarantee that the flue gas in desulfurizing tower can generate ammonium sulfate precipitation, reach the de- of depth again with slurry reaction
Sulphur effect；The first grade desulfurizing catch tray 112 is connect with oxidizing tower 200, by the buildup of the collection on first grade desulfurizing catch tray 112
It is delivered in oxidizing tower 200, first grade desulfurizing catch tray 112 can collect the ammonium sulfate after reaction, later by the sulfuric acid after collection
Ammonium is passed into the slurry pool 202 of oxidizing tower 200, and the slurries in the slurry pool 202 of oxidizing tower 200 are also dense with tower body 100
Contracting pond 101 is connected to, and realizes the recycling to slurries.
As shown in Figure 1, the flue gas desulphurization system further includes liquid collecting tank 300, the trapping layer includes catch tray 115 and catches
Spraying layer 116 is caught, the catch tray 115 and trapping layer are set gradually from the bottom to top along the inner wall of tower body 100, the catch tray
115 for collecting with the spray liquid after smoke reaction, in the concentration basin 101 for preventing spray liquid from falling into tower, while the cigarette of uplink
Gas can pass through, described to capture the ammonia of capture escape of spraying layer 116, while have the effect of dedusting；The catch tray 115 with
It captures spraying layer 116 to connect by liquid collecting tank 300, and is equipped with the pump housing on each connecting line, the spray that will be collected on catch tray 115
Leaching liquid is transported in liquid collecting tank 300, realizes the collection to spray liquid；Liquid collecting tank 300 is connected to oxidizing tower 200, realizes spray liquid
Recycling.
Further, as shown in Figure 1, the quantity of the liquid collecting tank 300 is two, the quantity of the trapping layer is two,
It is connected in series, is realized to the abundant collection of spray liquid and circulation between two trapping layer.
Further, as shown in Figure 1, the quantity of the demister 117 is three, three demisters 117 are along tower body 100
Wall is set gradually from top to bottom, realizes the abundant collection to vapor in tower body 100.
Further, as shown in Figure 1, the flue gas desulphurization system further includes water tank 400, water tank 400 and multiple demisters
117 connections, water are stored in water tank 400, are delivered in the demister 117 at the top of desulfurizing tower by the pump housing, water is recycled to by trapping layer
Liquid collecting tank 300, most of pump housing using liquid collecting tank 300 are delivered to capture spraying layer 116 and recycle, and fraction is delivered to collection
Flow container 300 is as supplement water, and similarly slurries largely recycle in liquid collecting tank 300, and fraction is delivered to 200 conduct of oxidizing tower
Moisturizing.
Further, as shown in Figure 1, the flue gas desulphurization system further includes ammonium hydroxide transport portion 500, the ammonium hydroxide conveying
Part 500 is connected to the slurry pool 202 of oxidizing tower 200 by the pump housing, realizes the supplement to the ammonia in slurry pool 202；The ammonia
Water transport portion 500 is connected to the upper end of oxidizing tower 200 by the pump housing, facilitate by oxidizing tower 200 oxygen and ammonium hydroxide simultaneously
It is transported in the tower body 100 of desulfurizing tower；The ammonium hydroxide transport portion 500 is connected to the concentration basin 101 of desulfurizing tower by the pump housing, real
Now to the supplement of the ammonia in the concentration basin of desulfurizing tower 101；The two-grade desulfurizing spraying layer of the ammonium hydroxide transport portion 500 and desulfurizing tower
113 are connected to by the pump housing, guarantee the supplement to the ammonia of 100 spray section 108 of tower body, so that the slurry in the concentration basin 101 of tower body 100
Liquid has both the function of cooling and desulfurization；The ammonium hydroxide transport portion 500 is connected to the three-level desulfurization spraying layer 114 of desulfurizing tower, is protected
Demonstrate,prove the supplement of the ammonia of 100 spray section 108 of tower body.
Further, as shown in Figure 1, the flue gas desulphurization system further includes ammonium sulfate preparation part 600, the ammonium sulfate
Preparation part 600 is connected to the outlet 118 of tower body 100 by the pump housing, the convenient precipitation to ammonia sulfate crystal.
Specifically, as shown in Figure 1, ammonium sulfate preparation part 600 includes sequentially connected level-one eddy flow from top to bottom
Plate thickener 601, second level spiral board thickener 602, centrifuge 603, drier 604 and collecting tank 605；The level-one spiral board
Thickener 601 is connected to mother liquor tank 606 with the discharge liquor of second level spiral board thickener 602 and centrifuge 603；The mother liquor tank
606 connect with the conversion zone 107 of the tower body 100.
Wherein, 101 slurries of concentration basin that solid content reaches 40% desulfurizing tower are delivered to ammonium sulfate preparation part by the pump housing
600, successively pass through 601-second level of level-one spiral board thickener spiral board 602-centrifuge of thickener, 603-drier 604, most
Ammonia sulfate crystal of the whole moisture content less than 5% flows into collecting tank 605.Level-one spiral board thickener 601, second level spiral board stiff
Device 602 and the isolated clear liquid of centrifuge 603 are back to mother liquor tank 606 after summarizing, and ammonium sulfate liquor pump group is utilized to return to desulfurizing tower
It is recycled in concentration basin 101.
It should be noted that above-mentioned described the first air aeration layer 104, the second air aeration layer 201 and the prior art
In aeration layer structure it is identical；First grade desulfurizing spraying layer 111, three-level desulfurization spraying layer 114, is caught at two-grade desulfurizing spraying layer 113
It is identical as spraying layer structure in the prior art to catch spraying layer 116；First grade desulfurizing catch tray 112, catch tray 115 and the prior art
In liquid collector structure it is identical；Demister 117 is identical as the structure of demister in the prior art；The level-one eddy flow
Plate thickener 601, the structure of second level spiral board thickener 602 are identical as the structure of thickener in the prior art.
The present invention simultaneously carries out the slurries in the slurries of concentration basin 101 and the slurry pool 202 of oxidizing tower 200 of desulfurizing tower
Oxidation and ammonification operation, make 80% or so slurries oxygenation efficiency of script be increased to 90%, the yield about 5% of ammonium sulfate can be improved.Together
When first grade desulfurizing spraying layer 111, two-grade desulfurizing spraying layer 113 and three-level desulfurization spraying layer 114 all have desulphurizing ability and each other
It is independent, first grade desulfurizing spraying layer 111 can be only opened in underload flue gas, 200 circulating pump of oxidizing tower is not involved in work at this time, section
The about energy；When flue gas load is higher, while first grade desulfurizing spraying layer 111, two-grade desulfurizing spraying layer 113 (two layers totally) are opened,
Up to potent desulfurization effect.Three layers of desulfurization, which are sprayed while being opened, can be improved desulphurizing ability about 50%, and desulfuration efficiency 99% can reach two
Sulfur oxide content 30mg/Nm3Minimum discharge below.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (14)
1. a kind of flue gas desulphurization system, including desulfurizing tower, the desulfurizing tower includes tower body, and the tower body bottom is provided with concentration
Pond；The first air aeration layer is equipped in the concentration basin of the tower body, the first air aeration layer is used for in the concentration basin
Slurries be aerated；It is characterized in that, the flue gas desulphurization system further includes oxidizing tower, the oxidizing tower and the tower body connect
Logical, the slurries of recycling are re-fed into the tower body after the oxidizing tower slurries, and the second air is equipped in the oxidizing tower and is exposed
Gas-bearing formation, the second air aeration layer is for being aerated the slurries in oxidizing tower.
2. flue gas desulphurization system according to claim 1, which is characterized in that the concentration bottom of pond portion of the tower body is equipped with buildup
Plate；
The buildup plate is located at the bottom of the first air aeration layer, and the buildup plate in the concentration bottom of pond portion by far from buildup
The side of the outlet of discharge one is sloped downwardly setting to the outlet for being equipped with buildup discharge.
3. flue gas desulphurization system according to claim 2, which is characterized in that pusher is connected on the tower body, it is described
Pusher end and the outlet of pusher are correspondingly arranged, and the pusher can extend into inside the tower body, and can act on product
In the buildup of flitch, to push the buildup on buildup plate.
4. flue gas desulphurization system according to claim 3, which is characterized in that the oxidizing tower includes slurry pool；
The slurry pool is located at the lower section of the second air aeration layer, and the slurry pool is connected to the concentration basin, for
Slurries are supplemented in the concentration basin.
5. flue gas desulphurization system according to claim 4, which is characterized in that the circumferential direction of the concentration basin of the tower body is equipped with
Multiple fluid jet spray guns being arranged successively, for being stirred to the slurries in concentration basin；
Multiple fluid jet spray guns being arranged successively also are provided in the circumferential direction of the slurry pool of the oxidizing tower, for the slurry in oxidizing tower
Liquid is stirred.
6. flue gas desulphurization system according to claim 5, which is characterized in that be provided with crystallized region, reaction in the tower body
Section, captures section and demisting section at spray section；
The crystallized region, conversion zone, spray section, capture section and demisting section are set gradually from the bottom to top in the tower body, described
Crystallized region includes concentration basin and the first air aeration layer, and for the precipitating of ammonium sulfate, the conversion zone is used for the reaction of desulfurization, institute
Spray section is stated for sprayed slurry, the ammonia for capturing section and being used to capture escape, the demisting section is for removing vapor.
7. flue gas desulphurization system according to claim 6, which is characterized in that the spray section includes successively cloth from the bottom to top
First grade desulfurizing spraying layer, first grade desulfurizing catch tray, two-grade desulfurizing spraying layer and the three-level desulfurization spraying layer set；
The concentration basin is connect with first grade desulfurizing spraying layer, for the slurries in concentration basin to be carried out secondary treatment；The level-one
Desulfurization catch tray is connect with oxidizing tower, for the buildup of the collection on first grade desulfurizing catch tray to be delivered in oxidizing tower；It is described
Oxidizing tower is connect with two-grade desulfurizing spraying layer, for oxygen to be passed into spray section；The slurry pool and three-level of the oxidizing tower
The connection of desulfurization spraying layer, slurries are sent in the spray section.
8. flue gas desulphurization system according to claim 7, which is characterized in that the flue gas desulphurization system further includes liquid collecting
Tank, the capture section includes trapping layer, and the trapping layer includes catch tray and capture spraying layer；
The catch tray is set gradually with capture spraying layer along tower body inner wall from the bottom to top, and the catch tray and the capture spray
Layer is connected by liquid collecting tank, and the liquid collecting tank is connected to the oxidizing tower.
9. flue gas desulphurization system according to claim 8, which is characterized in that the quantity of the liquid collecting tank be it is multiple, it is described
The quantity of trapping layer is multiple；
It is connected in series between multiple trapping layer.
10. flue gas desulphurization system according to claim 9, which is characterized in that the demisting section includes multiple demisters；
Multiple demisters are set gradually from the bottom to top along the inner wall of tower body.
11. flue gas desulphurization system according to claim 10, which is characterized in that the flue gas desulphurization system further includes water
Case；
The water tank is connected to multiple demisters.
12. flue gas desulphurization system according to claim 8, which is characterized in that the flue gas desulphurization system further includes ammonium hydroxide
Transport portion；
The ammonium hydroxide transport portion respectively with the slurry pool of the oxidizing tower, the upper end of the oxidizing tower, the desulfurizing tower it is dense
The three-level desulfurization spraying layer in contracting pond, the two-grade desulfurizing spraying layer of the desulfurizing tower and the desulfurizing tower is connected to.
13. flue gas desulphurization system according to claim 1, which is characterized in that the flue gas desulphurization system further includes sulfuric acid
Ammonium prepares part；
Ammonium sulfate preparation part is connected to the outlet of tower body.
14. flue gas desulphurization system according to claim 13, which is characterized in that ammonium sulfate preparation part includes by upper
Sequentially connected level-one spiral board thickener, second level spiral board thickener, centrifuge, drier and collecting tank under；Described one
Grade spiral board thickener is connected to mother liquor tank with the discharge liquor of second level spiral board thickener and centrifuge；The mother liquor tank and institute
State the conversion zone connection of tower body.
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