CN106178896A - The desulfurizer of a kind of ammonia circulation utilization and method - Google Patents
The desulfurizer of a kind of ammonia circulation utilization and method Download PDFInfo
- Publication number
- CN106178896A CN106178896A CN201610730990.3A CN201610730990A CN106178896A CN 106178896 A CN106178896 A CN 106178896A CN 201610730990 A CN201610730990 A CN 201610730990A CN 106178896 A CN106178896 A CN 106178896A
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- Prior art keywords
- ammonia
- desulfurizing tower
- regeneration tank
- underflow
- tower
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 164
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 79
- 238000000034 method Methods 0.000 title claims abstract description 33
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 66
- 238000011069 regeneration method Methods 0.000 claims abstract description 50
- 230000008929 regeneration Effects 0.000 claims abstract description 49
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 38
- 230000003647 oxidation Effects 0.000 claims abstract description 37
- 238000005507 spraying Methods 0.000 claims abstract description 31
- 239000002250 absorbent Substances 0.000 claims abstract description 18
- 230000002745 absorbent Effects 0.000 claims abstract description 18
- 230000001079 digestive effect Effects 0.000 claims abstract description 17
- 238000001035 drying Methods 0.000 claims abstract description 17
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 16
- 230000023556 desulfurization Effects 0.000 claims abstract description 14
- 238000010521 absorption reaction Methods 0.000 claims abstract description 13
- 230000001172 regenerating effect Effects 0.000 claims abstract description 13
- 239000000706 filtrate Substances 0.000 claims abstract description 9
- 239000003595 mist Substances 0.000 claims abstract description 9
- 238000004062 sedimentation Methods 0.000 claims abstract description 8
- 239000000779 smoke Substances 0.000 claims abstract description 7
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims description 38
- 239000000243 solution Substances 0.000 claims description 32
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 31
- 239000003546 flue gas Substances 0.000 claims description 31
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 22
- 239000007789 gas Substances 0.000 claims description 20
- 239000003795 chemical substances by application Substances 0.000 claims description 18
- 229910052717 sulfur Inorganic materials 0.000 claims description 16
- 239000011593 sulfur Substances 0.000 claims description 16
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 12
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 claims description 8
- 239000000292 calcium oxide Substances 0.000 claims description 6
- 235000012255 calcium oxide Nutrition 0.000 claims description 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 5
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 claims description 5
- 238000005276 aerator Methods 0.000 claims description 5
- 239000001257 hydrogen Substances 0.000 claims description 5
- 229910052739 hydrogen Inorganic materials 0.000 claims description 5
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims description 5
- 238000001556 precipitation Methods 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 4
- ZETCGWYACBNPIH-UHFFFAOYSA-N azane;sulfurous acid Chemical compound N.OS(O)=O ZETCGWYACBNPIH-UHFFFAOYSA-N 0.000 claims description 3
- -1 react Chemical compound 0.000 claims description 3
- 239000012266 salt solution Substances 0.000 claims description 3
- 238000001291 vacuum drying Methods 0.000 claims description 3
- 238000004064 recycling Methods 0.000 claims description 2
- PWDCHDJZNJXFSH-UHFFFAOYSA-L [O-]S([O-])=O.OS(O)=O.O.[Ca+2] Chemical compound [O-]S([O-])=O.OS(O)=O.O.[Ca+2] PWDCHDJZNJXFSH-UHFFFAOYSA-L 0.000 claims 1
- 230000029087 digestion Effects 0.000 claims 1
- 239000004744 fabric Substances 0.000 claims 1
- 238000001914 filtration Methods 0.000 claims 1
- 230000001105 regulatory effect Effects 0.000 claims 1
- 239000012047 saturated solution Substances 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 10
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 17
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 5
- 239000000920 calcium hydroxide Substances 0.000 description 5
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000006227 byproduct Substances 0.000 description 4
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000004575 stone Substances 0.000 description 4
- GBAOBIBJACZTNA-UHFFFAOYSA-L calcium sulfite Chemical compound [Ca+2].[O-]S([O-])=O GBAOBIBJACZTNA-UHFFFAOYSA-L 0.000 description 3
- 235000010261 calcium sulphite Nutrition 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910052602 gypsum Inorganic materials 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 239000013589 supplement Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 2
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 2
- 235000011130 ammonium sulphate Nutrition 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 235000011116 calcium hydroxide Nutrition 0.000 description 2
- 235000011132 calcium sulphate Nutrition 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000006071 cream Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- TXKMVPPZCYKFAC-UHFFFAOYSA-N disulfur monoxide Inorganic materials O=S=S TXKMVPPZCYKFAC-UHFFFAOYSA-N 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000000618 nitrogen fertilizer Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 230000009719 regenerative response Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 239000002912 waste gas 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
-
- 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
- B01D53/504—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 device
-
- 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
- B01D53/96—Regeneration, reactivation or recycling of reactants
-
- 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
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (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)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Treating Waste Gases (AREA)
Abstract
nullThe invention discloses desulfurizer and method that a kind of ammonia circulation utilizes，The desulfurizer that a kind of ammonia circulation utilizes includes the desulfurizing tower being provided with smoke inlet and chimney，It is sequentially provided with from top to bottom except mist layer inside desulfurizing tower、Scrubber layer、Absorb spraying layer and gas distributor，Ammonia regenerative system it is additionally provided with outside described desulfurizing tower，Ammonia regenerative system includes and the regeneration tank being connected at the bottom of desulfurizing tower tower，The bottom of regeneration tank is connected by underflow pipeline oxidation trough，The bottom of oxidation trough connects swirl concentrator，The top of swirl concentrator is connected by overflow pipe digestive shelf，Digestive shelf is passed in described regeneration tank，The bottom of described swirl concentrator connects drying machine，Filtrate port bottom drying machine is connected with described regeneration tank，It is also associated with sedimentation tank on described regeneration tank，Sedimentation tank is connected by pipeline the circulating slot being passed in described absorption spraying layer.The present invention can make to realize absorbent ammonia circulation and utilize, and just significantly reduces the operating cost of the ammonia process of desulfurization.
Description
Technical field
The invention belongs to waste gas pollution control and treatment field, for processing the sour gas such as sulfur dioxide in boiler smoke, concrete
Say and relate to a kind of desulfurizer and the method that ammonia circulation utilizes.
Background technology
Air is the most basic environmental key-element that the mankind depend on for existence, but is as human production activity and social activity
Increase, particularly a large amount of fuel combustions, industrial waste gas and the discharge of vehicle exhaust, make atmosphere quality increasingly deteriorate.Respectively
In class atmosphere pollution, it is most important that the pollution that fire coal causes.The coal-fired sulfur dioxide produced and nitrogen oxides pollution control
It it is the most urgent task in current China's Air Pollution Control field.The controlling soil moist of sulfur dioxide has three at present: de-before burning
Desulfurization (i.e. flue gas desulfurization FGD) after desulfurization in sulfur, burning, burning.Flue gas desulfurization at present is considered as that control sulfur dioxide is the most capable
Effective approach.Flue gas desulfurization is mainly wet method and dry method/semidry method.Wet fuel gas desulfurizing technology according to selected desulfurizing agent,
Desulphurization mechanism difference is broadly divided into following several: limestone/gypsum method, Dual alkali, ammonia process, magnesium processes, seawater method.Wherein ammonia process with
It is swift in response, without fouling and clogging, invest the feature such as low and become the developing direction of current wet desulphurization.But current ammonia process takes off
Sulfur technique absorbent ammonia price is higher, byproduct of ammonium sulfate is at a discount or selling price is low, and this becomes ammonia process of desulfurization application
Important restriction factor.
Summary of the invention
It is an object of the invention to provide one can make desulfurizing agent ammonia realize recycle, operating cost is low, adaptability
The desulfurizer of strong ammonia circulation utilization and method.
The present invention adopts the following technical scheme that the desulfurizer that a kind of ammonia circulation utilizes, including be provided with smoke inlet and
The desulfurizing tower of chimney, is sequentially provided with except mist layer, scrubber layer, absorption spraying layer and gas distributor from top to bottom inside desulfurizing tower,
Being additionally provided with ammonia regenerative system outside described desulfurizing tower, ammonia regenerative system includes and the regeneration tank being connected at the bottom of desulfurizing tower tower, regeneration
The bottom of groove is connected by underflow pipeline oxidation trough, and the bottom of oxidation trough connects swirl concentrator, swirl concentrator upper
Portion is connected by overflow pipe has digestive shelf, digestive shelf to be passed in described regeneration tank, and the bottom of described swirl concentrator connects to be had
Drying machine, the filtrate port bottom drying machine is connected with described regeneration tank, and described regeneration tank is also associated with sedimentation tank, and sedimentation tank leads to
Piping connects the circulating slot being passed in described absorption spraying layer.
Between absorption spraying layer and gas distributor, it is provided with concentration spraying layer, outside described desulfurizing tower in described desulfurizing tower
Being provided with from the concentrated solution circulating line being passed into described concentration spraying layer at the bottom of tower, concentrated solution circulating line is provided with concentrated solution circulation
Pump.
Described gas distributor is twisted tube assembly, and twisted tube assembly includes being full of the distortion of cross section in whole desulfurizing tower
Pipe.
Being provided with air sparger in described oxidation trough, described air sparger connects aerator.
Described drying machine is disc type vacuum drier.
Described underflow pipeline is provided with underflow pump, and the connection pipeline between described oxidation trough and swirl concentrator is provided with stone
Cream pump.
The sulfur method that a kind of ammonia circulation utilizes, comprises the following steps: flue gas enters in desulfurizing tower, sequentially passes through gas
Distributor, absorb spraying layer, scrubber layer and except mist layer, inversely contact with absorbent ammonia, react, sulfur dioxide in flue gas
Discharging from chimney after removing, the sulfur method that described ammonia circulation utilizes is further comprising the steps of: (1) absorbent ammonia and flue gas
In the reverse haptoreaction of sulfur dioxide after the bisulfite ammonium salt solution that generates fall at the bottom of desulfurizing tower tower, then from desulfurizing tower tower underflow
Enter regeneration tank；(2) underflow bottom regeneration tank being squeezed into oxidation trough, delivered to by air in oxidation trough, the oxygen in air is by Asia
Calcium sulfate is oxidized to calcium sulphate dihydrate；(3) underflow bottom oxidation trough being driven in swirl concentrator, slip is condensed to contain
Gu rate 30% supersaturated solution；(4) Gypsum Fibrosum will be further dried in the supersaturated solution feeding drying machine in previous step, will be true
Bottom empty drying machine, filtrate is back to regeneration tank；(5) overflowing liquid at swirl concentrator top is back to digestive shelf, by quick lime
In addition digestive shelf, the overflowing liquid with swirl concentrator top reacts generation regenerative agent Calx, and reacted Calx is supplemented in
Regeneration tank, desulfurizing agent ammonia is regenerated；(6) in regeneration tank regeneration desulfurizing agent ammonia through precipitation, filter and supplement liquefied ammonia or
After ammonia regulation pH value, it is passed into desulfurizing tower and absorbs recycling in spraying layer.
The sulfur method that described ammonia circulation utilizes is further comprising the steps of: absorbent ammonia and the sulfur dioxide in flue gas
After reverse haptoreaction, fall into bottom desulfurizing tower, be re-fed into concentrated solution spraying layer and be circulated absorption reaction, desulfurizing tower with flue gas
The concentration of bottom solution sulfite hydrogen ammonium is improved, then enters regeneration tank from desulfurizing tower underflow.
By underflow pump, the underflow bottom regeneration tank is squeezed into oxidation trough, by Gypsum Fibrosum pump, the underflow bottom oxidation trough is beaten
Enter in swirl concentrator.
In described step (4), the moisture content of the Gypsum Fibrosum that supersaturated solution is dried in drying machine is less than 10%.
Operationally, flue gas enters in desulfurizing tower the present invention through the smoke inlet of desulfurizing tower, sequentially pass through gas distributor,
Concentrate spraying layer, absorb spraying layer, scrubber layer and remove mist layer, inversely contact with concentrated solution and desulfurizing agent and react, remove two
Sulfur oxide, discharges from chimney.After the reverse haptoreaction of sulfur dioxide in absorbent ammonia and flue gas, fall into bottom desulfurizing tower,
Concentrated solution spraying layer sent into by concentrated liquid circulating pump, is circulated absorption reaction, the concentration of solution sulfite hydrogen ammonium with flue gas
Being improved, then enter regeneration tank from desulfurizing tower underflow, the slaked lime slurry come with digestive shelf reacts, and desulfurizing agent ammonia obtains again
Raw, use through precipitation and supplementary liquefied ammonia or ammonia regulation pH value Posterior circle.Regenerative agent Calx is by quick lime addition being disappeared
In change groove, the overflowing liquid with swirl concentrator top reacts generation, and reacted Calx is supplemented in regeneration tank.Bottom regeneration tank
Underflow squeeze into oxidation trough by underflow pump, air is delivered in oxidation trough by aerator, by air sparger, air is uniform
Feeding underflow in, calcium sulfite oxidation is become calcium sulphate dihydrate (Gypsum Fibrosum) by the oxygen in air.The bottom underflow of oxidation trough is led to
Crossing Gypsum Fibrosum pump and squeeze in swirl concentrator, slip is condensed to solid content 30% supersaturated solution, and this supersaturated solution sends into disk
Gypsum Fibrosum that moisture content be less than 10% is further dried in formula vacuum drier.The overflowing liquid at swirl concentrator top is back to disappear
Changing groove, disk vacuum drying motor spindle filtrate is back to regeneration tank.For preventing flue gas bias current in desulfurizing tower, at desulfurizing tower flue gas
Entrance top adds twisted tube gas distributor, and this gas distributor uses twisted tube assembly, by branched distortion bank of tubes
Row form, and are full of cross section in whole desulfurizing tower.After this distributor, there is strong spin disturbance in flue gas, extends flue gas
With the time of contact of absorbent, desulfuration efficiency is largely increased.
The theoretical basis of the present invention:
(1) reaction is absorbed
2NH3+H2O+SO2→(NH4)2SO3
(NH4)2SO3+SO2+H2O→2NH4HSO3
NH3+H2O+SO2→NH4HSO3
(2) regenerative response:
CaO+H2O→Ca(OH)2
2 NH4HSO3+ Ca(OH)2→(NH4)2SO3+CaSO3·1/2H2O+3/2H2O
(NH4)2SO3+ Ca(OH)2+1/2 H2O→2 NH3+ H2O+ CaSO3·1/2H2O
(3) oxidation reaction:
2CaSO3·1/2H2O+3H2O+O2→2CaSO4·2 H2O
The present invention, than prior art, has following remarkable advantage: one is that absorbent ammonia circulation utilizes, the restriction ammonia process of desulfurization
Matter of utmost importance is exactly that absorbent ammonia price is higher, and absorbent achieves and recycles, and just significantly reduces the fortune of the ammonia process of desulfurization
Row cost；Two is the CaSO of regeneration3Precipitation the most in a device, therefore will not produce fouling and clogging in device with flue；
Three is side-product CaSO4·2H2O stable performance, to environment non-secondary pollution, can do building materials or industrial raw materials, and it is convenient to dispose.
Using the present invention, the ammonia that price is higher is recycled, it is only necessary to supplement a small amount of consumption, and device is less scaling, blocking, regeneration
Agent Calx is cheap, and buying is convenient, and by-product Gypsum Fibrosum is disposed convenient, and the by-product ammonium sulfate of the ammonia process of desulfurization, make nitrogenous fertilizer and contain
Nitrogen quantity is low, easily makes the hardening soil, and often sales resistance or price are the lowest, it may be said that the present invention has had the ammonia process of desulfurization and Calx concurrently
The advantage of stone/gypsum desulfurization.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a kind of embodiment of the desulfurizer that ammonia circulation utilizes；
Fig. 2 is the structural representation of twisted tube distributor in Fig. 1.
Detailed description of the invention
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
The structure of a kind of embodiment of the desulfurizer that ammonia circulation of the present invention utilizes is as it is shown in figure 1, it includes being provided with cigarette
The desulfurizing tower 2 of gas entrance 8 and chimney 1, desulfurizing tower (2) is internal to be sequentially provided with from top to bottom except mist layer 3, scrubber layer 4, absorption spray
Layer 5 and gas distributor 7, be provided with concentration spraying layer 8 between absorption spraying layer 5 and gas distributor 7 in described desulfurizing tower,
Described desulfurizing tower 2 is externally provided with from the concentrated solution circulating line being passed into described concentration spraying layer 8 at the bottom of tower, on concentrated solution circulating line
It is provided with concentrated solution circulating pump 9.Being additionally provided with ammonia regenerative system outside described desulfurizing tower 2, ammonia regenerative system includes and desulfurizing tower tower
The regeneration tank 10 that the end connects, the bottom of regeneration tank 10 is connected by underflow pipeline oxidation trough 15, and the bottom of oxidation trough 15 connects
Having swirl concentrator 13, it is described that the top of swirl concentrator 13 has digestive shelf 12, digestive shelf 12 to be passed into by overflow pipe connection
In regeneration tank 10, the bottom of described swirl concentrator 13 connects drying machine 14, the filtrate port bottom drying machine 14 with described again
Raw groove 10 connects, and described regeneration tank 10 is also associated with sedimentation tank 11, and sedimentation tank 11 is passed into described suction by pipeline connection
Receive the circulating slot 20 in spraying layer 5.Described gas distributor 7 is twisted tube assembly, and twisted tube assembly includes being full of whole desulfurization
The twisted tube distributor of cross section in tower.It is provided with air sparger 16 in described oxidation trough, described air sparger 16 connects
There is aerator 18.Described drying machine 14 is disc type vacuum drier.Described underflow pipeline is provided with underflow pump 19, described oxidation
Connection pipeline between groove and swirl concentrator is provided with Gypsum Fibrosum pump 17.
Operationally, flue gas enters in desulfurizing tower through the smoke inlet 8 of desulfurizing tower 2 the present embodiment, sequentially passes through twisted tube
Gas distributor 7, concentrate spraying layer 6, absorb spraying layer 5, scrubber layer 4 and except mist layer 3, inversely connect with concentrated solution and desulfurizing agent
Touch, react, remove sulfur dioxide, discharge from chimney 1.Absorbent ammonia and the reverse haptoreaction of sulfur dioxide in flue gas
After, fall into bottom desulfurizing tower, concentrated liquid circulating pump 9 is sent into concentrated solution spraying layer 6 and is circulated absorption reaction, solution with flue gas
The concentration of sulfite hydrogen ammonium is improved, then enters regeneration tank 10 from desulfurizing tower underflow, sends out with the slaked lime slurry of digestive shelf 12
Raw reaction, desulfurizing agent ammonia is regenerated, and uses through precipitation and supplementary liquefied ammonia or ammonia regulation pH value Posterior circle.The ripe stone of regenerative agent
Ash is to react generation, reacted ripe stone by quick lime adds in digestive shelf 12 overflowing liquid with swirl concentrator 13 top
Ash is supplemented in regeneration tank 10.Underflow bottom regeneration tank 10 squeezes into oxidation trough 15 by underflow pump 19, and air is sent by aerator 18
To oxidation trough, being sent into uniformly in underflow by air by air sparger 16, the oxygen in air is by calcium sulfite oxidation
Become calcium sulfate.The bottom underflow of oxidation trough 15 is squeezed in swirl concentrator 13 by Gypsum Fibrosum pump 17, and slip is condensed to solid content
30% supersaturated solution, is further dried into moisture content in this supersaturated solution feeding disc type vacuum drier 14 and is less than 10%
Gypsum Fibrosum.These Gypsum Fibrosum may be used for building materials or industrial raw materials, or directly fills.The overflowing liquid at swirl concentrator 13 top returns
Being back to digestive shelf 12, bottom disk vacuum drier 14, filtrate is back to regeneration tank 10.The twisted tube gas on smoke inlet top
Distributor 7 is to be formed by the arrangement of multiple twisted tubes, is full of cross section in whole tower, plays uniform flue gas and make flue gas spin
The effect of disturbance, extends the time of contact of flue gas and absorbent, and desulfuration efficiency is largely increased.
The embodiment of the sulfur method that ammonia circulation of the present invention utilizes, comprises the following steps: flue gas enters in desulfurizing tower, depends on
Secondary through gas distributor, absorb spraying layer, scrubber layer and except mist layer, inversely contact with absorbent ammonia, react, flue gas
Middle sulfur dioxide is discharged from chimney after removing, and the sulfur method that described ammonia circulation utilizes is further comprising the steps of: (1) absorbent
The bisulfite ammonium salt solution generated after the reverse haptoreaction of sulfur dioxide in ammonia and flue gas falls at the bottom of desulfurizing tower tower, then from de-
Sulfur tower tower underflow enters regeneration tank；(2) by underflow pump, the underflow bottom regeneration tank is squeezed into oxidation trough, air is delivered to oxidation trough
In, calcium sulfite oxidation is become calcium sulphate dihydrate by the oxygen in air；(3) by Gypsum Fibrosum pump, the underflow bottom oxidation trough is squeezed into
In swirl concentrator, slip is condensed to solid content 30% supersaturated solution；(4) supersaturated solution in previous step is sent into
Gypsum Fibrosum that moisture content be less than 10% is further dried in drying machine, vacuum drying motor spindle filtrate is back to regeneration tank；(5)
The overflowing liquid at swirl concentrator top is back to digestive shelf, quick lime is added in digestive shelf with swirl concentrator top overflow
Flow liquid reaction generates regenerative agent Calx, and reacted Calx is supplemented in regeneration tank, and desulfurizing agent ammonia is regenerated；(6) again
In raw groove, the desulfurizing agent ammonia of regeneration is after precipitating, filter and supplement liquefied ammonia or ammonia regulation pH value, is passed into desulfurizing tower and absorbs
Spraying layer recycles.
The sulfur method that described ammonia circulation utilizes is further comprising the steps of: absorbent ammonia and the sulfur dioxide in flue gas
After reverse haptoreaction, fall into bottom desulfurizing tower, be re-fed into concentrated solution spraying layer and be circulated absorption reaction, desulfurizing tower with flue gas
The concentration of bottom solution sulfite hydrogen ammonium is improved, then enters regeneration tank from desulfurizing tower underflow.
Claims (10)
1. the desulfurizer that ammonia circulation utilizes, including being provided with the desulfurizing tower (2) of smoke inlet (8) and chimney (1), desulfurization
Tower (2) is internal to be sequentially provided with except mist layer (3), scrubber layer (4), absorption spraying layer (5) and gas distributor (7) from top to bottom, its
Being characterised by: be additionally provided with ammonia regenerative system outside described desulfurizing tower (2), ammonia regenerative system includes and is connected at the bottom of desulfurizing tower tower
Regeneration tank (10), the bottom of regeneration tank (10) is connected by underflow pipeline oxidation trough (15), and the bottom of oxidation trough (15) connects
Having swirl concentrator (13), the top of swirl concentrator (13) is connected by overflow pipe digestive shelf (12), and digestive shelf (12) leads to
Entering in described regeneration tank (10), the bottom of described swirl concentrator (13) connects drying machine (14), drying machine (14) bottom
Filtrate port be connected with described regeneration tank (10), described regeneration tank (10) is also associated with sedimentation tank (11), sedimentation tank (11) lead to
Piping connects the circulating slot (20) being passed in described absorption spraying layer (5).
The desulfurizer that ammonia circulation the most according to claim 1 utilizes, it is characterised in that: it is positioned at suction in described desulfurizing tower
Receiving and be provided with concentration spraying layer (8) between spraying layer (5) and gas distributor (7), described desulfurizing tower (2) is externally provided with and is passed through from the bottom of tower
To the concentrated solution circulating line of described concentration spraying layer (8), concentrated solution circulating line is provided with concentrated solution circulating pump (9).
The desulfurizer that ammonia circulation the most according to claim 1 utilizes, it is characterised in that: described gas distributor (7)
For twisted tube assembly, twisted tube assembly includes being full of the twisted tube of cross section in whole desulfurizing tower.
The desulfurizer that ammonia circulation the most according to claim 1 utilizes, it is characterised in that: it is provided with sky in described oxidation trough
Gas distributor (16), the upper connection of described air sparger (16) has aerator (18).
The desulfurizer that ammonia circulation the most according to claim 1 utilizes, it is characterised in that: described drying machine (14) is circle
Disc type vacuum drier.
The desulfurizer that ammonia circulation the most according to claim 1 utilizes, it is characterised in that: described underflow pipeline is provided with
Underflow pump (19), the connection pipeline between described oxidation trough and swirl concentrator is provided with Gypsum Fibrosum pump (17).
7. the sulfur method that ammonia circulation utilizes, comprises the following steps: flue gas enters in desulfurizing tower, sequentially passes through gas and divides
Cloth device, absorbing spraying layer, scrubber layer and except mist layer, inversely contact with absorbent ammonia, react, sulfur dioxide in flue gas is removed
Discharge from chimney after going, it is characterised in that the sulfur method that described ammonia circulation utilizes is further comprising the steps of: (1) absorbent
The bisulfite ammonium salt solution generated after the reverse haptoreaction of sulfur dioxide in ammonia and flue gas falls at the bottom of desulfurizing tower tower, then from de-
Sulfur tower tower underflow enters regeneration tank；(2) underflow bottom regeneration tank is squeezed into oxidation trough, air is delivered in oxidation trough, in air
Oxygen calcium sulfite oxidation is become calcium sulphate dihydrate；(3) underflow bottom oxidation trough is driven in swirl concentrator, slip
It is condensed to solid content 30% supersaturated solution；(4) will be further dried in the supersaturated solution feeding drying machine in previous step
Gypsum Fibrosum, is back to regeneration tank by vacuum drying motor spindle filtrate；(5) overflowing liquid at swirl concentrator top is back to digestion
Groove, adds quick lime in digestive shelf the overflowing liquid with swirl concentrator top and reacts generation regenerative agent Calx, reacted
Calx is supplemented in regeneration tank, and desulfurizing agent ammonia is regenerated；(6) the desulfurizing agent ammonia regenerated in regeneration tank is through precipitation, filtration
After regulating pH value with supplementary liquefied ammonia or ammonia, it is passed into desulfurizing tower and absorbs recycling in spraying layer.
The sulfur method that ammonia circulation the most according to claim 7 utilizes, it is characterised in that: described ammonia circulation utilizes
Sulfur method is further comprising the steps of: after the reverse haptoreaction of sulfur dioxide in absorbent ammonia and flue gas, fall into desulfurizing tower
Bottom, is re-fed into concentrated solution spraying layer and flue gas and is circulated absorption reaction, desulfurizing tower bottom solution sulfite hydrogen ammonium dense
Degree is improved, then enters regeneration tank from desulfurizing tower underflow.
The sulfur method that ammonia circulation the most according to claim 7 utilizes, it is characterised in that: by underflow pump by regeneration tank
The underflow of bottom squeezes into oxidation trough, the underflow bottom oxidation trough is driven in swirl concentrator by Gypsum Fibrosum pump.
The sulfur method that ammonia circulation the most according to claim 7 utilizes, it is characterised in that: in described step (4), mistake
The moisture content of the Gypsum Fibrosum that saturated solution is dried in drying machine is less than 10%.
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| CN108786398A (en) * | 2017-05-02 | 2018-11-13 | 中国石油化工股份有限公司 | Flue gas desulfurization regenerates integrated tower and Regeneratable wet fuel gas desulfurizing method |
| CN109569222A (en) * | 2018-12-21 | 2019-04-05 | 张君宇 | The ammonia regeneration utilization process of the ammonia process of desulfurization |
| CN109749789A (en) * | 2019-03-15 | 2019-05-14 | 镇江东亚碳素焦化有限公司 | A kind of ammonia process coal gas desulfurization system and its ammonia process gas desulfurization method |
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| CN110302650B (en) * | 2019-07-30 | 2023-10-20 | 苏州仕净科技股份有限公司 | Desulfurization and denitrification system for waste gas treatment of thermal power plant |
| CN112326573A (en) * | 2020-11-03 | 2021-02-05 | 广西中检食品检测有限公司 | Method for rapidly determining mercury content in seasoning by direct mercury detector |
| CN112326573B (en) * | 2020-11-03 | 2024-03-08 | 广西中检食品检测有限公司 | Method for rapidly measuring mercury content in seasoning by direct mercury meter |
| CN115806398A (en) * | 2022-11-16 | 2023-03-17 | 新乡北新建材有限公司 | Ammonia water and calcium hydroxide automatic control system for gypsum board line |
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Application publication date: 20161207 |