CN110201524A - A kind of wet desulphurization device and method of semi-dry desulphurization ash resource utilization - Google Patents
A kind of wet desulphurization device and method of semi-dry desulphurization ash resource utilization Download PDFInfo
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- CN110201524A CN110201524A CN201910433638.7A CN201910433638A CN110201524A CN 110201524 A CN110201524 A CN 110201524A CN 201910433638 A CN201910433638 A CN 201910433638A CN 110201524 A CN110201524 A CN 110201524A
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- desulphurization
- slurries
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- gypsum
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- 238000000034 method Methods 0.000 title claims abstract description 48
- 239000002002 slurry Substances 0.000 claims abstract description 143
- 239000010440 gypsum Substances 0.000 claims abstract description 89
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 89
- 239000007788 liquid Substances 0.000 claims abstract description 83
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 74
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 57
- 230000023556 desulfurization Effects 0.000 claims abstract description 56
- 230000003647 oxidation Effects 0.000 claims abstract description 56
- 230000001590 oxidative effect Effects 0.000 claims abstract description 55
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 47
- 239000007921 spray Substances 0.000 claims abstract description 42
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 33
- 230000008569 process Effects 0.000 claims abstract description 31
- 238000003860 storage Methods 0.000 claims abstract description 25
- 230000007246 mechanism Effects 0.000 claims abstract description 24
- 238000005406 washing Methods 0.000 claims abstract description 20
- 238000004537 pulping Methods 0.000 claims abstract description 8
- 238000005507 spraying Methods 0.000 claims description 58
- 239000003546 flue gas Substances 0.000 claims description 42
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 40
- 239000007789 gas Substances 0.000 claims description 38
- 238000003892 spreading Methods 0.000 claims description 28
- 229910052717 sulfur Inorganic materials 0.000 claims description 17
- 239000011593 sulfur Substances 0.000 claims description 17
- 239000012530 fluid Substances 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 239000000706 filtrate Substances 0.000 claims description 15
- 238000004090 dissolution Methods 0.000 claims description 12
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 8
- 239000006071 cream Substances 0.000 claims description 8
- 238000009826 distribution Methods 0.000 claims description 8
- 229910052760 oxygen Inorganic materials 0.000 claims description 8
- 239000001301 oxygen Substances 0.000 claims description 8
- 230000005484 gravity Effects 0.000 claims description 7
- 239000004575 stone Substances 0.000 claims description 6
- 230000018044 dehydration Effects 0.000 claims description 5
- 238000006297 dehydration reaction Methods 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- 239000005864 Sulphur Substances 0.000 claims description 4
- 230000001174 ascending effect Effects 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 4
- 239000011505 plaster Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 3
- 229910052925 anhydrite Inorganic materials 0.000 claims description 3
- 238000000889 atomisation Methods 0.000 claims description 3
- 229910052791 calcium Inorganic materials 0.000 claims description 3
- 239000011575 calcium Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000002955 isolation Methods 0.000 claims description 2
- 239000012535 impurity Substances 0.000 claims 2
- 239000004744 fabric Substances 0.000 claims 1
- 238000000746 purification Methods 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 33
- 239000000292 calcium oxide Substances 0.000 description 26
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 26
- GBAOBIBJACZTNA-UHFFFAOYSA-L calcium sulfite Chemical compound [Ca+2].[O-]S([O-])=O GBAOBIBJACZTNA-UHFFFAOYSA-L 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 8
- 229910001385 heavy metal Inorganic materials 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 235000010261 calcium sulphite Nutrition 0.000 description 6
- 239000000779 smoke Substances 0.000 description 6
- 239000006227 byproduct Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 239000013589 supplement Substances 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- -1 amphoteric oxide Inorganic materials 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 238000002386 leaching Methods 0.000 description 2
- 239000002923 metal particle Substances 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical class [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000009102 absorption Effects 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- FYHXNYLLNIKZMR-UHFFFAOYSA-N calcium;carbonic acid Chemical compound [Ca].OC(O)=O FYHXNYLLNIKZMR-UHFFFAOYSA-N 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000002594 sorbent Substances 0.000 description 1
- 150000003463 sulfur Chemical class 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/75—Multi-step processes
-
- 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
- B01D53/77—Liquid phase processes
- B01D53/79—Injecting reactants
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/46—Sulfates
- C01F11/464—Sulfates of Ca from gases containing sulfur oxides
-
- 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
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/602—Oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/608—Sulfates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses the wet desulphurization devices and method of a kind of semi-dry desulphurization ash resource utilization, it is characterized in that, including desulfurization washing mechanism, Desulphurization pulping mechanism and oxidation and concentration processes mechanism, the desulfurization washing mechanism includes at least desulfurizing tower (1), desulfuration recycle pump (2), Desulphurization slurries spray pump (6) and gypsum slurries spray pump (9)；The Desulphurization pulping mechanism includes at least Desulphurization slurrying tank (3), desulfurized mortar liquid pump (4) and desulfurized mortar liquid storage tank (5)；The oxidation and concentration processes mechanism includes at least oxidizing tower (7), oxidation fan (8) and gypsum discharge pump (10).Compared with prior art, the present invention solves semi-dry desulphurization ash resource utilization problem by wet desulfurizing process, wet desulphurization device purification efficiency is improved while reducing wet desulphurization device operating cost and reducing energy consumption, and secondary system pollution is small.
Description
Technical field
The present invention relates to the wet desulphurization devices and method of a kind of semi-dry desulphurization ash resource utilization, belong to resource and ring
Protect field in border.
Background technique
Flue gas desulfurization mainly uses wet process, dry method and semidry process.Wherein semidry method is invested compared to wet desulfurizing process
Less, occupied area is small, saves water and energy, and pollutes without wastewater and waste acid, therefore deep by middle small power plant, metallurgy sintered, heating, change
The industries such as work building materials are welcome.In semidry process desulfurizer operational process, the high temperature original flue gas and mist of a large amount of dust particulate matter are carried
Desulfurizer slurry fine mist after change contacts, and the sour gas such as SOX, HCl, HF in flue gas and alkaline slurry droplet are quickly anti-
Should exchange heat, complete acid gas removal, while desulfurizer slurry droplet be evaporated by flue gas after with dust particles in flue gas by dedusting
Device traps to form semi-dry desulphurization by-product-Desulphurization.Semi-dry process flue gas desulphurization ash is a kind of grayish powder, and appearance is as water
Mud, water content 1%~5% (average value 3%), 0.55~1.0t/m3 of volume density, 2.25~2.69t/m3 of real density.Desulfurization
Ash particle partial size is smaller, and most partial sizes concentrate on 20um or less.Semi-dry desulphurization ash is by calcium sulfite, calcium sulfate, carbonic acid
Calcium, calcium hydroxide, a small amount of calcium chloride, calcirm-fluoride and flying dust composition, wherein CaO and SO3 content is higher.In addition, in Desulphurization
Also containing a large amount of aluminum oxides and Si oxide and detection device for multi metallic elements, such as Zn, Cu, Cd, Mo, Cr, Mn and Ni.
A large amount of calcium sulfite (CaSO in semi-dry desulphurization ash3) and unreacted calcium oxide (CaO) seriously limit half
The Land use systems and range of dry-process desulfurized ash, a large amount of calcium sulfite (CaSO3) cause semi-dry desulphurization ash property unstable, mistake
High CaO causes desulfurization ash alkalinity higher, larger to environmental hazard.Semi-dry desulphurization ash is only used for backfill or outdoor heap at present
It puts, does not only take up a large amount of soils, cause underground water pollution, since its density is smaller, lighter weight will be everywhere once wind
It flies upward, pollutes air；If serious secondary pollution can be caused to pollute to environment and water source using improper.National annual discharge
About 20,000,000 tons of Desulphurization, a large amount of semi-dry desulphurization ash can not be handled.This sulfur removal technology generates new dirt while desulfurization
Dye forms vicious circle.
Semi-dry desulphurization ash is used for wet desulphurization, as the desulfurizing agent of wet desulphurization device, not only can use desulfurization
Calcium sulfite (CaSO in tower oxidative system complete oxidation Desulphurization3), moreover it is possible to release is by calcium sulfite in oxidation process
(CaSO3) package calcium oxide (CaO), and using the alkalinity of calcium oxide (CaO) as wet desulphurization agent progress desulfurization, can compared with
The lower resource utilization for realizing semi-dry desulphurization ash of low cost.But semi-dry desulphurization ash is directly used in wet desulfurization system
There are following problems: (1) containing amphoteric oxides such as a large amount of aluminum oxide and Si oxides in semi-dry desulphurization ash, in wet process
Sweetening process can wrap up sorbent particle and increase the dehydration difficulty of desulfurizing byproduct；(2) and most of calcium oxide (CaO) is half
Calcium sulfite (the CaSO being generated during dry desulfurization3) package, Desulphurization slurries overall desulfurization capacity is lower, SO in flue gas2
When concentration is higher, wet desulfurization system desulfuration efficiency can be reduced；(3) contain a large amount of organic matter and heavy metal in Desulphurization, it will
Semi-dry desulphurization ash is directly used in wet desulphurization, can reduce by-product gypsum purity and desulfurization wastewater processing difficulty.
Therefore, the invention proposes the wet desulphurization devices and method of a kind of semi-dry desulphurization ash resource utilization, in reality
Existing semi-dry desulphurization ash sulfite calcium (CaSO3) and calcium oxide (CaO) complete resource raising wet desulphurization device processing effect
The operating cost of wet desulphurization device is greatly reduced while fruit.
Summary of the invention
The object of the present invention is to provide the wet desulphurization devices and method of a kind of semi-dry desulphurization ash resource utilization, will be wet
Method desulfurizing tower is divided into two absorber portions up and down by the liquid return trough layer that there is liter gas to connect liquid function, utilizes semi-dry desulphurization ash and stone
The semi-dry desulphurization ash slurries of cream filtrate and supplement process water preparation are used for the flue gas desulfurization of upper end low-sulfur, are sprayed by Desulphurization slurries
Porous plate layer reinforcing desulfuration ash sulfite calcium (CaSO below drenching layer3) oxidation and calcium oxide (CaO) dissolution, in conjunction with have point
The efficient oxidation tower of layer suspension separation function extracts high purity plaster, is realizing semi-dry desulphurization ash sulfite calcium (CaSO3) and
The operation of wet desulphurization device is greatly reduced in calcium oxide (CaO) complete resource while improving wet desulphurization device treatment effect
Cost.
To achieve the above object, the present invention provides technical solution below:
A kind of wet desulphurization device of semi-dry desulphurization ash resource utilization, which is characterized in that including desulfurization washing mechanism,
Desulphurization pulping mechanism and oxidation and concentration processes mechanism, in which:
The desulfurization washing mechanism include at least desulfurizing tower (1), desulfuration recycle pump (2), Desulphurization slurries spray pump (6) and
Gypsum slurries spray pump (9), the desulfurizing tower (1) are equipped with air inlet (1-1) and gas outlet (1-9), in the desulfurizing tower (1)
The part below air inlet (1-1) is desulfurization stock tank, edge between the interior air inlet of the desulfurizing tower (1) (1-1) and gas outlet (1-9)
The direction of flow of flue gas be successively arranged desulfurization spraying layer (1-2), level-one demister layer (1-3), liquid return trough layer (1-4), porous
Plate layer (1-5), Desulphurization slurries spraying layer (1-6), gypsum slurries spraying layer (1-7) and second level demister layer (1-8)；
The Desulphurization pulping mechanism includes at least Desulphurization slurrying tank (3), desulfurized mortar liquid pump (4) and Desulphurization slurries
Storage tank (5)；
The oxidation and concentration processes mechanism includes at least oxidizing tower (7), oxidation fan (8) and gypsum discharge pump (10).
Further, the entrance of the desulfurized mortar liquid pump (4) is connected by the bottom of pipeline and Desulphurization slurrying tank (3)
Logical, outlet is connected to by pipeline with the top of desulfurized mortar liquid storage tank (5), and the bottom of the desulfurized mortar liquid storage tank (5) is logical
It crosses Desulphurization slurries spray pump (6) to connect with Desulphurization slurries spraying layer (1-6), the entrance of the gypsum slurries spray pump (9)
It is connected to the top of oxidizing tower (7), the outlet of the gypsum slurries spray pump (9) is connected to gypsum slurries spraying layer (1-7)；Institute
The entrance for the desulfuration recycle pump (2) stated is connected to by pipeline with desulfurizing tower (1) stock tank, and outlet passes through pipeline and desulfurization spraying layer
(1-2) connection.
Further, the top of the Desulphurization slurrying tank (3) is equipped with gypsum filtrate pipe (3-1), Desulphurization delivery pipe
Agitating device is equipped in (3-2) and process water delivery pipe (3-3), Desulphurization slurrying tank (3) and desulfurized mortar liquid storage tank (5).
Further, the oxidizing tower (7) is sealing structure, and being equipped in tower body can be by the oxidizing tower (7) inner cavity point
It is segmented into the air-spreading disk (7-1) of upper and lower two chambers that can be connected to, on oxidizing tower (7) side wall above the air-spreading disk (7-1)
Liquid outlet equipped with leakage fluid dram (7-2) and with gypsum slurries spray pump (9) inlet communication, below the air-spreading disk (7-1)
Oxidizing tower (7) side wall is equipped with air inlet, the air inlet and oxidation fan (8) outlet, the top of the oxidizing tower (7)
Equipped with the exhaust passage (7-3) being connected to desulfurizing tower (1) air inlet (1-1), the bottom of the oxidizing tower (7) passes through pipeline and stone
Cream discharge pump (10) inlet communication.
Further, the air-spreading disk (7-1) is the plate body equipped with several apertures, the aperture of the aperture be 5mm~
20mm, percent opening are 30%~50%, i.e., the gross area of the described aperture is the 30%~50% of air-spreading disk (7-1) surface area, institute
Air-spreading disk (7-1) is stated to be located at 1/3~1/2 height of oxidizing tower (7).
Further, the liquid return trough layer (1-4) is arranged in the top of level-one demister layer (1-3), porous plate layer (1-5)
Lower section, be equipped in the liquid return trough layer (1-4) and rise gas and return liquid device, rise for lower section air-flow and its top slurries collect row
Outside, the liquid return trough layer (1-4) is equipped with the leakage fluid dram being connected to outside with tower, the drain of the liquid return trough layer (1-4) to desulfurizing tower (1) out
Mouth at the top of pipeline and oxidizing tower (7) by being connected to.
Further, the porous plate layer (1-5) is located at the top of liquid return trough layer (1-4), Desulphurization slurries spraying layer (1-
6) lower section, the porous plate layer (1-5) include the porous plate that several layers are equipped with aperture (11), and the aperture of the aperture (11) is
10mm~20mm, the gross area of the aperture (11) is the 15%~40% of desulfurizing tower (1) area of section, preferably, described
It is 1~2 layer that the number of plies, which is arranged, in porous plate.
A kind of wet desulphurization method of semi-dry desulphurization ash resource utilization, is provided using semi-dry desulphurization ash as described above
Source using wet desulphurization device implemented, specifically includes the following steps:
A, flue gas enters from the air inlet (1-1) of desulfurizing tower (1), inversely connects with the sprayed slurry of desulfurization spraying layer (1-2)
Touching washing, completes primary wash desulfurization；
B, the flue gas of the preliminary desulfurization of completion forms low-sulfur flue gas to upstream after passing upward through level-one demister layer (1-3) demisting
It is dynamic, sequentially pass through liquid return trough layer (1-4), porous plate layer (1-5), Desulphurization slurries spraying layer (1-6) and gypsum slurries spraying layer
(1-7) carries out deep desulfuration,
Wherein semi-dry desulphurization ash, gypsum filtrate and process water are sent by transfer pipeline into Desulphurization slurrying tank (3), de-
The semi-dry desulphurization that Desulphurization mass concentration is 5%~15% is configured under the stirring action of sulphur ash slurrying tank (3) interior blender
Grey slurries are simultaneously sent by desulfurized mortar liquid pump (4) to storage in desulfurized mortar liquid storage tank (5), and the basic components such as CaO are molten in Desulphurization
High pH slurries are formed out, and Desulphurization slurries pass through Desulphurization slurries spray pump (6) again and sent by desulfurized mortar liquid storage tank (5) to desulfurization
Grey slurries spraying layer (1-6) atomization, inversely contacts washing, the alkali such as CaO of dissolution with the low-sulfur flue gas for completing primary wash desulfurization
Property component spray washing process generate CaSO3；
C, the low pH Desulphurization slurries for completing spray washing desulfurization fall under gravity into porous plate layer (1-5), and wear
It crosses porous plate aperture and upward flue gas forms gas-liquid turbulence layer, the CaSO in Desulphurization slurries3It is contacted with the oxygen in flue gas
It is oxidized and generates CaSO4Gypsum slurries are formed, liquid return trough layer (1-4) is eventually fallen into and oxidizing tower (7) is guided to by leakage fluid dram
It is interior；
D, oxidation air is sent into oxidizing tower (7) by oxidation fan (8), to CaSO remaining in gypsum slurries3Into
Row oxidation, the gas distribution mode of the oxidation fan (8) are pipe network gas distribution, and the air-spreading disk (7-1) in the oxidizing tower (7) is broken
Layering isolation is carried out to gypsum slurries while broken oxidation air bubble, the biggish gypsum particle of density sinks to air-spreading disk (7-1)
Oxidizing tower (7) bottom below is discharged by gypsum discharge pump (10) and is dehydrated high purity gypsum；The lesser Desulphurization of density is miscellaneous
Matter, CaSO3The cavity on oxidizing tower (7) top for being influenced to be suspended in air-spreading disk (7-1) or more by ascending air with components such as CaO
It is interior, and given by gypsum slurries spray pump (9) to gypsum slurries spraying layer (1-7) and continue washing, oxidation, layering, and remaining is miscellaneous
Matter by oxidizing tower (7) sidewall upper leakage fluid dram (7-2) outlet；
E, the clean flue gas after completing deep desulfuration is after second level demister layer (1-8) demisting by the outlet of desulfurizing tower (1)
Mouth (1-9) discharge, it is final to realize semi-dry desulphurization ash resource utilization.
Further, oxidizing tower (7) the interior slurries residence time is 15min~40min.
Further, Desulphurization slurries spraying layer (1-6) liquid-gas ratio is 1~3L/Nm3, spraying layer coverage rate is
200%~350%；Gypsum slurries spraying layer (1-7) liquid-gas ratio is 2~5L/Nm3, spraying layer coverage rate be 150%~
250%.
Compared with prior art, the invention has the following advantages:
(1) the present invention provides a kind of solution of semi-dry desulphurization ash resource utilization, semi-dry desulphurization ash is straight
It connects for wet desulphurization, aoxidizes CaSO using wet desulphurization device3And using the CaO of dissolution as the desulfurizing agent of wet desulphurization, most
CaSO at last3It is converted into the gypsum that resourcebility utilizes with CaO, while solving semi-dry desulphurization ash resource utilization problem
Reduce wet desulphurization device operating cost；
(2) the present invention provides a kind of solution party that wet desulphurization device purification efficiency is improved using semi-dry desulphurization ash
Case, by with higher pH but the not high Desulphurization slurries of desulfurization capacity are used to purify and have completed the low-sulfur flue gas of preliminary desulfurization,
While greatly improving low-sulfur gas cleaning efficiency, semi-dry desulphurization ash resource utilization is realized；
(3) the present invention provides the solutions that semi-dry desulphurization ash resource utilization is realized in a kind of low energy consumption, by setting
Porous plate layer is set, the turbulence layer formed above porous plate layer using rising flue gas stream and semi-dry desulphurization ash sprayed slurry,
Strengthen CaSO3Oxidation and CaO dissolution desulfurization, reduce Desulphurization in CaSO3While aoxidizing energy consumption, wet process is greatly improved
The purification efficiency of desulfurizing tower；
(4) it the present invention provides a kind of semi-dry desulphurization ash resource utilization scheme that secondary pollution is small, is filtered using gypsum
Pulping water of the liquid as semi-dry desulphurization ash, and desulfurizing tower is divided into two sections of absorptions, effectively avoid both sexes oxygen in Desulphurization
The influence of compound and heavy metal to wet desulfurization system and by-product, improve desulfurizer entirety purification efficiency, only need to administer by
The waste water of oxidizing tower leakage fluid dram discharge, secondary system pollution are small.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is the structural schematic diagram of porous plate in the present invention.
As shown in the figure: 1 is desulfurizing tower, and 1-1 is air inlet, and 1-2 is desulfurization spraying layer, and 1-3 is level-one demister layer, 1-4
It is liquid return trough layer, 1-5 is porous plate layer, and 1-6 is Desulphurization slurries spraying layer, and 1-7 is gypsum slurries spraying layer, and 1-8 is second level
Demister layer, 1-9 are gas outlets, and 2 be desulfuration recycle pump, and 3 be Desulphurization slurrying tank, and 3-1 is gypsum filtrate pipe, and 3-2 is desulfurization
Grey delivery pipe, 3-3 are process water delivery pipes, and 4 be desulfurized mortar liquid pump, and 5 be desulfurized mortar liquid storage tank, and 6 be the spray of Desulphurization slurries
Leaching pump, 7 be oxidizing tower, and 7-1 is air-spreading disk, and 7-2 is leakage fluid dram, and 7-3 is exhaust passage, and 8 be oxidation fan, and 9 be gypsum slurries
Spray pump, 10 be gypsum discharge pump, and 11 be aperture.
Specific embodiment
The following detailed description of the preferred embodiment of the present invention.
Embodiment 1: being the structural schematic diagram of the embodiment of the present invention 1 referring to Figures 1 and 2,
A kind of wet desulphurization device of semi-dry desulphurization ash resource utilization, including desulfurization washing mechanism, Desulphurization slurrying
Mechanism and oxidation and concentration processes mechanism, in which:
The desulfurization washing mechanism includes at least desulfurizing tower 1, desulfuration recycle pump 2, Desulphurization slurries spray pump 6 and calcium plaster
Liquid spray pump 9, the desulfurizing tower 1 are equipped with air inlet 1-1 and gas outlet 1-9, air inlet 1-1 and gas outlet in the desulfurizing tower 1
Direction between 1-9 along flow of flue gas is successively arranged desulfurization spraying layer 1-2, level-one demister layer 1-3, liquid return trough layer 1-4, more
Orifice layer 1-5, Desulphurization slurries spraying layer 1-6, gypsum slurries spraying layer 1-7 and second level demister layer 1-8；The desulfurization follows
The entrance of ring pump 2 is connected to by pipeline with 1 stock tank of desulfurizing tower, and outlet is connected to by pipeline with desulfurization spraying layer 1-2.Described time liquid
The top of level-one demister layer 1-3, the lower section of porous plate layer 1-5 is arranged in groove layer 1-4, and interior be equipped with of the liquid return trough layer 1-4 rises
Gas returns liquid device, rises for lower section air-flow and its top slurries are collected outside discharge desulfurizing tower 1, the liquid return trough layer 1-4 is equipped with
With the leakage fluid dram being connected to outside tower, liquid return trough leakage fluid dram at the top of pipeline and oxidizing tower 7 by being connected to.The porous plate layer 1-5 is located at
The top of liquid return trough layer 1-4, the lower section of Desulphurization slurries spraying layer 1-6, the porous plate layer 1-5 include that several layers are equipped with aperture
11 porous plate, the aperture of the aperture 11 are 10mm~20mm, and the gross area of the aperture 11 is 1 area of section of desulfurizing tower
15%~40%, preferably, the porous plate setting number of plies is 1~2 layer.
The Desulphurization pulping mechanism includes at least Desulphurization slurrying tank 3, desulfurized mortar liquid pump 4 and desulfurized mortar liquid storage tank
5；
The entrance of the desulfurized mortar liquid pump 4 is connected to by pipeline with the bottom of Desulphurization slurrying tank 3, and outlet passes through pipe
Road is connected to the top of desulfurized mortar liquid storage tank 5, and the bottom of the desulfurized mortar liquid storage tank 5 passes through Desulphurization slurries spray pump 6
It is connect with Desulphurization slurries spraying layer 1-6, the entrance of the gypsum slurries spray pump 9 is connected to the top of oxidizing tower 7, the stone
The outlet of cream slurries spray pump 9 is connected to gypsum slurries spraying layer 1-7；The top of the Desulphurization slurrying tank 3 is equipped with gypsum
Filtrate pipe 3-1, Desulphurization delivery pipe 3-2 and process water delivery pipe 3-3, in Desulphurization slurrying tank 3 and desulfurized mortar liquid storage tank 5
Equipped with agitating device.
The oxidation and concentration processes mechanism includes at least oxidizing tower 7, oxidation fan 8 and gypsum discharge pump 10.
The oxidizing tower 7 is sealing structure, can equipped with two above and below capable of being divided into 7 inner cavity of oxidizing tower in tower body
Leakage fluid dram 7-2 and and stone are equipped with 7 side wall of oxidizing tower above the air-spreading disk 7-1, the air-spreading disk 7-1 of the chamber of connection
The liquid outlet that cream slurries spray pump 9 is connected to, 7 side wall of oxidizing tower below the air-spreading disk 7-1 are equipped with air inlet, the air inlet
Mouth is connect with oxidation fan 8, and the top of the oxidizing tower 7 is equipped with the exhaust passage 7-3 being connected to 1 air inlet 1-1 of desulfurizing tower, institute
The bottom for stating oxidizing tower 7 is connected to by pipeline with gypsum discharge pump 10.
The air-spreading disk 7-1 is the plate body equipped with several apertures, and the aperture of the aperture is 5mm~20mm, percent opening
It is 30%~50%, the air-spreading disk 7-1 is located at 1/3~1/2 height of oxidizing tower 7.
In actual use: sulfur-containing smoke gas enters into and up movement, desulfurization slurry by the air inlet 1-1 of 1 bottom side of the wall of desulfurizing tower
Desulphurization circulating liquid in pond is sent by desulfuration recycle pump 2 to desulfurization spraying layer 1-2, after desulfurization spraying layer 1-2 spray atomizing under
Flowing and the reverse haptoreaction of sulfur-containing smoke gas, major part SO in flue gas2Absorbed by sprayed slurry, flue gas complete preliminary desulfurization and with
Sprayed slurry heat exchange cooling, the flue gas for completing preliminary desulfurization continue to flow up after level-one demister layer 1-3 demisting destarch,
It is successively carried out by liquid return trough layer 1-4, porous plate layer 1-5, Desulphurization slurries spraying layer 1-6 and gypsum slurries spraying layer 1-7 deep
Desulfurizing and purifying is spent, the flue gas of completion deep desulfuration purification is after second level demister layer 1-8 demisting by the gas outlet at 1 top of desulfurizing tower
1-9 discharge.
Gypsum filtrate and semi-dry desulphurization ash are sent into Desulphurization slurrying by gypsum filtrate pipe 3-1 and Desulphurization delivery pipe 3-2
It is configured to the Desulphurization slurries that Desulphurization mass concentration is 5%~15% in tank 3, is equipped with blender in Desulphurization slurrying tank 3 and uses
It is stirred evenly in by Desulphurization slurries, when gypsum amount of filtrate is inadequate, then from process water delivery pipe 3-3 to Desulphurization slurrying tank 3
Interior supplement process water guarantees that Desulphurization mass concentration is met the requirements in slurries.Configured Desulphurization slurries are by Desulphurization slurries
Pump 4 is sent to desulfurized mortar liquid storage tank 5, and the interior blender that is equipped with of desulfurized mortar liquid storage tank 5 also can with preventing slurries from depositing
Promote the dissolution of CaO in Desulphurization, improves the pH of Desulphurization slurries in desulfurized mortar liquid storage tank 5.
The Desulphurization slurries of higher pH carry a large amount of CaSO3, CaO, amphoteric oxide, heavy metal etc. spray by Desulphurization slurries
Leaching pump 6, which is sent to Desulphurization slurries spraying layer 1-6, carries out spray atomizing, inversely connects with the low-sulfur flue gas flowed up along desulfurizing tower 1
It touches, completes to remain SO in the CaO and flue gas of dissolution in Desulphurization slurries2Reaction generates CaSO3Flue gas realizes deep purifying simultaneously.
The Desulphurization slurries for completing spray washing fall under gravity into porous plate layer 1-5, in the height that porous plate layer 1-5 stomata rises
Under fast airflow function, gas-liquid turbulence layer is formed above porous plate layer 1-5 with perforation air-flow.Under gas-liquid disturbance, in Desulphurization
Original CaSO3The CaSO generated with wash spray sweetening process3It contacts, aoxidize with the oxygen in flue gas, release and wrapped up
CaO；Meanwhile strong gas-liquid turbulence also promotes the dissolution of CaO, improves the smoke desulfurization efficiency of turbulence layer.It is big in Desulphurization
Part CaSO3, CaO be converted into byproduct rock cream in the oxidation, dissolution, desulphurization reaction of gas-liquid turbulence layer, form gypsum slurries.
Gypsum slurries carry a small amount of CaSO for not completing conversion3, CaO passes through and porous plate layer 1-5 and falls under the effect of gravity
Enter liquid return trough layer 1-4, and oxidizing tower 7 is discharged by pipeline through liquid return trough layer 1-4.Oxidation air is sent into oxidizing tower 7 by oxidation fan 8
The gas distribution pipe network of lower section floats under buoyancy upwards after gas distribution pipe network is broken into bubble, to remaining in gypsum slurries
CaSO3Deep oxidation is carried out, while suspension stirring action is played to gypsum slurries.It is several small equipped with being provided in the middle part of oxidizing tower 7
The air-spreading disk 7-1 in hole completes oxidation knot for being crushed ascending gas bubbles offer gas liquid interfacial area and being layered to gypsum slurries
Brilliant gypsum crystal grain density is larger, falls under gravity into below air-spreading disk 7-1, and in outstanding under oxidation air effect
Floating state；CaSO in Desulphurization3, CaO, the partial size and density of amphoteric oxide and heavy metal fine particle it is smaller, aoxidizing
It is in suspended state above air-spreading disk 7-1 under aerostatic buoyancy effect, the gypsum slurries pH through two-stage oxidation drops to 4.5~6.0.
The upper layer gypsum slurries that deep oxidation is completed in oxidizing tower 7 contain a small amount of unreacted CaO, by gypsum slurries spray pump 9 send to
Gypsum slurries spraying layer 1-7 atomization, the reaction was continued with sulfur-containing smoke gas, while avoiding the Desulphurization slurries spraying layer due to higher pH
1-6 slurries avoid generating scale formation in desulfurizing tower 1；Amphoteric oxide, heavy metal particles in gypsum slurries is by oxidizing tower side
The leakage fluid dram 7-2 of wall is discharged；The gypsum slurries for completing sedimentation concentration, which are sent by gypsum discharge pump 10 to dewatering system dehydration, produces height
Pure gypsum, gypsum dehydration filtrate are sent by pipeline to Desulphurization slurrying tank 3.Oxidation process pH is too low in order to prevent causes SO2Escape,
The exhaust passage 7-3 being connected to 1 air inlet 1-1 of desulfurizing tower is equipped at the top of oxidizing tower 7, for sending the oxidation air for completing oxidation
Enter in desulfurizing tower 1.
Embodiment 2: a kind of wet desulphurization method of semi-dry desulphurization ash resource utilization, specifically includes the following steps:
A, sulfur-containing smoke gas enters into and up movement from the air inlet 1-1 of 1 bottom side of the wall of desulfurizing tower, the desulfurization in desulfurization stock tank
Circulation fluid is sent by desulfuration recycle pump 2 to desulfurization spraying layer 1-2, is flowed downward after desulfurization spraying layer 1-2 spray atomizing and sulfur-bearing
Flue gas inversely contacts washing, major part SO in flue gas2It is absorbed by sprayed slurry, complete primary wash desulfurization and is changed with sprayed slurry
Heat drop temperature；
B, the flue gas of the preliminary desulfurization of completion forms low-sulfur flue gas to upstream after passing upward through level-one demister layer 1-3 demisting
It is dynamic, sequentially pass through liquid return trough layer 1-4, porous plate layer 1-5, Desulphurization slurries spraying layer 1-6 and gypsum slurries spraying layer 1-7 progress
Deep desulfuration,
Gypsum filtrate and semi-dry desulphurization ash are sent into Desulphurization slurrying by gypsum filtrate pipe 3-1 and Desulphurization delivery pipe 3-2
It is configured to the Desulphurization slurries that Desulphurization mass concentration is 5%~15% in tank 3, is equipped with blender in Desulphurization slurrying tank 3 and uses
It is stirred evenly in by Desulphurization slurries, when gypsum amount of filtrate is inadequate, then from process water delivery pipe 3-3 to Desulphurization slurrying tank 3
Interior supplement process water guarantees that Desulphurization mass concentration is met the requirements in slurries.Configured Desulphurization slurries are by Desulphurization slurries
Pump 4 is sent to storing in desulfurized mortar liquid storage tank 5, and blender is equipped in the desulfurized mortar liquid storage tank 5 to prevent slurries from depositing, together
When can also promote the dissolution of CaO in Desulphurization, improve the pH of Desulphurization slurries in desulfurized mortar liquid storage tank 5.
The Desulphurization slurries of higher pH carry a large amount of CaSO3, CaO, amphoteric oxide, heavy metal etc. pass through Desulphurization slurries
Spray pump 6 is sent to Desulphurization slurries spraying layer 1-6 by desulfurized mortar liquid storage tank 5 and carries out spray atomizing, with along desulfurizing tower 1 to upstream
Dynamic low-sulfur flue gas inversely contacts, and completes to remain SO in the CaO and flue gas of dissolution in Desulphurization slurries2Reaction generates CaSO3Simultaneously
Flue gas realizes deep purifying.
C, the low pH Desulphurization slurries for completing spray washing fall under gravity into porous plate layer 1-5, in porous plate layer
Under the action of high-speed airflow that 1-5 stomata rises, and porous plate aperture is passed through and upward flue gas is formed above porous plate layer 1-5
Gas-liquid turbulence layer, under gas-liquid disturbance, original CaSO in Desulphurization3The CaSO generated with wash spray sweetening process3With flue gas
In oxygen contact be oxidized generate CaSO4, release the CaO wrapped up；Meanwhile strong gas-liquid turbulence also promotes CaO
Dissolution, improve turbulence layer smoke desulfurization efficiency.Major part CaSO in Desulphurization3, CaO gas-liquid turbulence layer oxidation, molten
Out, it is converted into byproduct rock cream in desulphurization reaction, forms gypsum slurries, gypsum slurries carry a small amount of CaSO for not completing conversion3、
CaO passes through porous plate layer 1-5 and falls under gravity into liquid return trough layer 1-4, and is discharged into oxidation by pipeline through liquid return trough layer 1-4
Tower 7；
D, oxidation air is sent into the gas distribution pipe network of 7 lower section of oxidizing tower by oxidation fan 8, and oxidation air is broken through gas distribution pipe network
At floating upwards under buoyancy after bubble, to CaSO remaining in gypsum slurries3Deep oxidation is carried out, while to calcium plaster
Liquid plays suspension stirring action.The air-spreading disk 7-1 for being provided with several apertures is equipped in the middle part of oxidizing tower 7, for being crushed ascending gas bubbles
Gas liquid interfacial area is provided and gypsum slurries are layered, the gypsum crystal grain density for completing oxidizing and crystallizing is larger, in weight
It is fallen into below air-spreading disk 7-1 under power effect, and is in suspended state under oxidation air effect；CaSO in Desulphurization3, CaO, two
The partial size and density of property oxide and heavy metal fine particle are smaller, under oxidation air buoyancy above air-spreading disk 7-1
In suspended state, the gypsum slurries pH through two-stage oxidation drops to 4.5~6.0.The upper layer stone of deep oxidation is completed in oxidizing tower 7
Cream slurries contain a small amount of unreacted CaO, are sent by gypsum slurries spray pump 9 to gypsum slurries spraying layer 1-7 and are atomized, with sulfur-bearing cigarette
The reaction was continued for gas, while the Desulphurization slurries spraying layer 1-6 slurries due to higher pH being avoided to avoid generation fouling existing in desulfurizing tower 1
As；Amphoteric oxide, heavy metal particles in gypsum slurries are discharged by the leakage fluid dram 7-2 of oxidation tower side wall；Complete sedimentation concentration
Gypsum slurries sent by gypsum discharge pump 10 to dewatering system and be dehydrated high purity gypsum, gypsum dehydration filtrate has pipeline to send to de-
Sulphur ash slurrying tank 3.Oxidation process pH is too low in order to prevent causes SO2Escape, is equipped at the top of oxidizing tower 7 and 1 air inlet of desulfurizing tower
The exhaust passage 7-3 of 1-1 connection, the oxidation air for that will complete oxidation are sent into desulfurizing tower 1.
E, the clean flue gas after completing deep desulfuration is after second level demister layer 1-8 demisting by the outlet at 1 top of desulfurizing tower
Mouth 1-9 discharge, it is final to realize semi-dry desulphurization ash resource utilization.
The slurries residence time is 15min~40min in the oxidizing tower 7.
The Desulphurization slurries spraying layer 1-6 liquid-gas ratio is 1~3L/Nm3, spraying layer coverage rate be 200%~
350%；The gypsum slurries spraying layer 1-7 liquid-gas ratio is 2~5L/Nm3, spraying layer coverage rate is 150%~250%.
What has been described above is only a preferred embodiment of the present invention, it is noted that for those of ordinary skill in the art
For, without departing from the concept of the premise of the invention, several changes and improvements can also be made, these belong to the present invention
Protection scope.
Claims (10)
1. a kind of wet desulphurization device of semi-dry desulphurization ash resource utilization, which is characterized in that including desulfurization washing mechanism, take off
Sulphur ash pulping mechanism and oxidation and concentration processes mechanism, in which:
The desulfurization washing mechanism includes at least desulfurizing tower (1), desulfuration recycle pump (2), Desulphurization slurries spray pump (6) and gypsum
Slurries spray pump (9), the desulfurizing tower (1) are equipped with air inlet (1-1) and gas outlet (1-9), the interior air inlet of the desulfurizing tower (1)
Desulfurization spraying layer (1-2), level-one demister layer are successively arranged along the direction of flow of flue gas between (1-1) and gas outlet (1-9)
(1-3), liquid return trough layer (1-4), porous plate layer (1-5), Desulphurization slurries spraying layer (1-6), gypsum slurries spraying layer (1-7) and
Second level demister layer (1-8)；
The Desulphurization pulping mechanism includes at least Desulphurization slurrying tank (3), desulfurized mortar liquid pump (4) and desulfurized mortar liquid storage tank
(5)；
The oxidation and concentration processes mechanism includes at least oxidizing tower (7), oxidation fan (8) and gypsum discharge pump (10).
2. the wet desulphurization device of semi-dry desulphurization ash resource utilization as described in claim 1, which is characterized in that described de-
The entrance of sulphur mortar liquid pump (4) is connected to the bottom of Desulphurization slurrying tank (3), the top of outlet and desulfurized mortar liquid storage tank (5)
The bottom of portion's connection, the desulfurized mortar liquid storage tank (5) passes through Desulphurization slurries spray pump (6) and Desulphurization slurries spraying layer
(1-6) connection, the entrance of the gypsum slurries spray pump (9) are connected to the top of oxidizing tower (7), the gypsum slurries spray pump
(9) outlet is connected to gypsum slurries spraying layer (1-7).
3. the wet desulphurization device of semi-dry desulphurization ash resource utilization as described in claim 1, which is characterized in that described
The top of Desulphurization slurrying tank (3) is equipped with gypsum filtrate pipe (3-1), Desulphurization delivery pipe (3-2) and process water delivery pipe (3-
3), agitating device is equipped in Desulphurization slurrying tank (3) and desulfurized mortar liquid storage tank (5).
4. the wet desulphurization device of semi-dry desulphurization ash resource utilization as described in claim 1, which is characterized in that the oxygen
Changing tower (7) is sealing structure, air-spreading disk (7-1) is equipped in tower body, on oxidizing tower (7) side wall above the air-spreading disk (7-1)
Liquid outlet equipped with leakage fluid dram (7-2) and with gypsum slurries spray pump (9) inlet communication, below the air-spreading disk (7-1)
Oxidizing tower (7) side wall is equipped with air inlet (1-1), the air inlet (1-1) and oxidation fan (8) outlet, the oxidation
The top of tower (7) is equipped with the exhaust passage (7-3) being connected to desulfurizing tower (1) air inlet (1-1), the bottom of the oxidizing tower (7)
With gypsum discharge pump (10) inlet communication.
5. the wet desulphurization device of semi-dry desulphurization ash resource utilization as claimed in claim 4, which is characterized in that the cloth
Gas disk (7-1) is the plate body equipped with several apertures, and the aperture of the aperture is 5mm~20mm, and percent opening is 30%~50%,
The air-spreading disk (7-1) is located at 1/3~1/2 height of oxidizing tower (7).
6. the wet desulphurization device of semi-dry desulphurization ash resource utilization as described in claim 1, which is characterized in that described time
Liquid bath layer (1-4) setting is equipped with leakage fluid dram, the drain in the top of level-one demister layer (1-3), the liquid return trough layer (1-4)
Mouth is connected to by pipeline with the top of oxidizing tower (7).
7. the wet desulphurization device of semi-dry desulphurization ash resource utilization as described in claim 1, which is characterized in that described more
Orifice layer (1-5) includes the porous plate that several layers are equipped with aperture (11), and the aperture of the aperture (11) is 10mm~20mm, described
The gross area of aperture (11) is the 15%~40% of desulfurizing tower (1) area of section.
8. a kind of wet desulphurization method of semi-dry desulphurization ash resource utilization, which is characterized in that using such as claim 1~7
The device, and the following steps are included:
A, flue gas enters from the air inlet (1-1) of desulfurizing tower (1), inversely contacts and washes with the sprayed slurry of desulfurization spraying layer (1-2)
It washs, completes primary wash desulfurization；
B, formation low-sulfur flue gas flows up after the flue gas of the preliminary desulfurization of completion passes upward through level-one demister layer (1-3) demisting,
Sequentially pass through liquid return trough layer (1-4), porous plate layer (1-5), Desulphurization slurries spraying layer (1-6) and gypsum slurries spraying layer (1-
7) deep desulfuration is carried out,
Wherein semi-dry desulphurization ash, gypsum filtrate and process water are sent by transfer pipeline into Desulphurization slurrying tank (3), stirring configuration
The semi-dry desulphurization ash slurries for being 5%~15% at Desulphurization mass concentration are simultaneously sent by desulfurized mortar liquid pump (4) to desulfurized mortar
Liquid storage tank (5), the basic components such as CaO dissolve out to form high pH slurries in Desulphurization, then by Desulphurization slurries spray pump (6) send to
Desulphurization slurries spraying layer (1-6) atomization inversely contacts washing, the CaO of dissolution with the low-sulfur flue gas for completing primary wash desulfurization
Equal basic components generate CaSO in spray washing process3；
C, the low pH Desulphurization slurries for completing spray washing desulfurization fall under gravity into porous plate layer (1-5), more with passing through
Orifice plate aperture and upward flue gas form gas-liquid turbulence layer, the CaSO in Desulphurization slurries3It is oxidized and generates CaSO4Form gypsum
Slurries eventually fall into liquid return trough layer (1-4) and are guided in oxidizing tower (7) by leakage fluid dram；
D, oxidation air is sent into oxidizing tower (7) by oxidation fan (8), to CaSO remaining in gypsum slurries3Carry out oxygen
Change, the gas distribution mode of the oxidation fan (8) is pipe network gas distribution, and the air-spreading disk (7-1) in the oxidizing tower (7) is in broken oxygen
Layering isolation is carried out to gypsum slurries while changing air bubble, the biggish gypsum particle of density sinks to air-spreading disk (7-1) below
Oxidizing tower (7) bottom, by gypsum discharge pump (10) be discharged dehydration high purity gypsum；The lesser Desulphurization impurity of density,
CaSO3Oxidizing tower (7) top for being suspended in air-spreading disk (7-1) or more is influenced by ascending air with the components such as CaO, and by calcium plaster
Liquid spray pump (9), which is sent to gypsum slurries spraying layer (1-7), continues washing, oxidation, layering, and impurity is by oxidizing tower (7) sidewall upper
Leakage fluid dram (7-2) outlet；
E, the clean flue gas after completing deep desulfuration is after second level demister layer (1-8) demisting by the gas outlet (1- of desulfurizing tower (1)
9) it is discharged, it is final to realize semi-dry desulphurization ash resource utilization.
9. the wet desulphurization method of semi-dry desulphurization ash resource utilization as claimed in claim 8, which is characterized in that the oxygen
Change tower (7) interior slurries residence time is 15min~40min.
10. the wet desulphurization method of semi-dry desulphurization ash resource utilization as claimed in claim 8, which is characterized in that described
Desulphurization slurries spraying layer (1-6) liquid-gas ratio be 1~3L/Nm3, spraying layer coverage rate is 200%~350%；The stone
Cream slurries spraying layer (1-7) liquid-gas ratio is 2~5L/Nm3, spraying layer coverage rate is 150%~250%.
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