CN106621753A - Ceramic industry kiln furnace desulfurization treatment method - Google Patents
Ceramic industry kiln furnace desulfurization treatment method Download PDFInfo
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- CN106621753A CN106621753A CN201611219566.9A CN201611219566A CN106621753A CN 106621753 A CN106621753 A CN 106621753A CN 201611219566 A CN201611219566 A CN 201611219566A CN 106621753 A CN106621753 A CN 106621753A
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- China
- Prior art keywords
- flue gas
- desulfurizing tower
- ceramic industry
- alkali lye
- industry kiln
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000023556 desulfurization Effects 0.000 title claims abstract description 21
- 239000000919 ceramic Substances 0.000 title claims abstract description 13
- 239000003546 flue gas Substances 0.000 claims abstract description 68
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 66
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000001816 cooling Methods 0.000 claims abstract description 13
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000006243 chemical reaction Methods 0.000 claims abstract description 12
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 7
- 238000005507 spraying Methods 0.000 claims abstract description 7
- 239000007864 aqueous solution Substances 0.000 claims abstract description 4
- 238000001704 evaporation Methods 0.000 claims abstract description 4
- 230000008020 evaporation Effects 0.000 claims abstract description 4
- 239000003513 alkali Substances 0.000 claims description 28
- 239000007789 gas Substances 0.000 claims description 12
- 238000003672 processing method Methods 0.000 claims description 11
- 238000005695 dehalogenation reaction Methods 0.000 claims description 10
- 235000019504 cigarettes Nutrition 0.000 claims description 7
- 239000002893 slag Substances 0.000 claims description 7
- 239000002002 slurry Substances 0.000 claims description 7
- 239000000243 solution Substances 0.000 claims description 6
- 235000019738 Limestone Nutrition 0.000 claims description 5
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 5
- 239000012717 electrostatic precipitator Substances 0.000 claims description 5
- 239000003500 flue dust Substances 0.000 claims description 5
- 239000006028 limestone Substances 0.000 claims description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 3
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 3
- 239000002585 base Substances 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
- 239000004571 lime Substances 0.000 claims description 3
- 239000011777 magnesium Substances 0.000 claims description 3
- 229910052749 magnesium Inorganic materials 0.000 claims description 3
- 239000011734 sodium Substances 0.000 claims description 3
- 229910052708 sodium Inorganic materials 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims 1
- 239000007788 liquid Substances 0.000 abstract description 6
- 239000000428 dust Substances 0.000 abstract description 2
- 238000005406 washing Methods 0.000 abstract description 2
- 229910000039 hydrogen halide Inorganic materials 0.000 abstract 1
- 239000012433 hydrogen halide Substances 0.000 abstract 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- RAHZWNYVWXNFOC-UHFFFAOYSA-N sulfur dioxide Inorganic materials O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 15
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 14
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 description 12
- 229910052753 mercury Inorganic materials 0.000 description 9
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 8
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 8
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 8
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 4
- 239000010440 gypsum Substances 0.000 description 4
- 229910052602 gypsum Inorganic materials 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 239000003245 coal Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- -1 hydrogen halides Chemical class 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000005201 scrubbing Methods 0.000 description 3
- 239000002912 waste gas Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical group [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000000443 aerosol Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000013505 freshwater Substances 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 229910000040 hydrogen fluoride Inorganic materials 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- NKWPZUCBCARRDP-UHFFFAOYSA-L calcium bicarbonate Chemical compound [Ca+2].OC([O-])=O.OC([O-])=O NKWPZUCBCARRDP-UHFFFAOYSA-L 0.000 description 1
- 229910000020 calcium bicarbonate Inorganic materials 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 231100000053 low toxicity Toxicity 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229940100892 mercury compound Drugs 0.000 description 1
- 150000002731 mercury compounds Chemical class 0.000 description 1
- 229910000474 mercury oxide Inorganic materials 0.000 description 1
- UKWHYYKOEPRTIC-UHFFFAOYSA-N mercury(ii) oxide Chemical compound [Hg]=O UKWHYYKOEPRTIC-UHFFFAOYSA-N 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000011941 photocatalyst Substances 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—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
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/007—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by irradiation
-
- 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
- B01D53/64—Heavy metals or compounds thereof, e.g. mercury
-
- 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
- B01D53/68—Halogens or halogen compounds
-
- 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
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- 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
- B01D53/86—Catalytic processes
- B01D53/8603—Removing sulfur compounds
- B01D53/8609—Sulfur oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/30—Alkali metal compounds
- B01D2251/304—Alkali metal compounds of sodium
-
- 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
- B01D2251/402—Alkaline earth metal or magnesium compounds of magnesium
-
- 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
- B01D2251/604—Hydroxides
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/80—Type of catalytic reaction
- B01D2255/802—Photocatalytic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/20—Halogens or halogen compounds
- B01D2257/204—Inorganic halogen compounds
- B01D2257/2045—Hydrochloric acid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/20—Halogens or halogen compounds
- B01D2257/204—Inorganic halogen compounds
- B01D2257/2047—Hydrofluoric acid
-
- 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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- Treating Waste Gases (AREA)
Abstract
The invention provides a ceramic industry kiln furnace desulfurization treatment method. The ceramic industry kiln furnace desulfurization treatment method comprises the following steps: 1) boosting flue gas from an electrostatic dust remover by a booster fan, cooling and dehalogenating the boosted flue gas by utilizing alkaline liquid, and reducing the flue gas temperature to be lower than 160 DEG C through evaporation of the alkaline water and process water, wherein the alkaline liquid boiler ash washing water and an aqueous solution of magnesium oxide; 2) enabling the cooled and dehalogenated flue gas to enter a desulfurizing tower, which is provided with a demister, an ultraviolet generator, a spraying layer, a flue gas input area and an alkaline liquid pool area sequentially from top to bottom, through a flue gas heater, wherein the flue gas enters the desulfurizing tower through the flue gas input area, and SO2 in the flue gas reacts with the alkaline liquid in the desulfurizing tower; 3) performing demisting treatment on the flue gas subjected to desulfurizing reaction to remove liquid drops carried by the flue gas and separate clean flue gas. Due to the adoption of the desulfurization treatment method, hydrogen halide can be effectively removed from the flue gas, the desulfurization efficiency of the desulfurizing tower is improved and the service life of the desulfurizing tower is prolonged.
Description
Technical field
The invention belongs to technical field of desulfurization, and in particular to a kind of ceramic industry kiln desulfuration processing method.
Background technology
SO2It is a kind of global atmosphere pollution, due to SO2A large amount of discharges and the environmental pollution such as caused acid rain is asked
Topic is extremely serious.The SO of China2Distributing source mainly has coal fired thermal power plant, coal-burned industrial boiler and other industry and civilian installation,
Wherein, the SO that coal-burned industrial boiler is produced2Discharge capacity accounts for national SO2The 30% of total emission volumn, therefore, coal-burned industrial boiler cigarette
The development and application of desulfurization complete set technology are very necessary.Not only contain SO in fire coal boiler fume2, also containing hydrogen fluoride, mercury etc..
Limestone-gypsum Wet Flue Gas Desulfurization Process system is to the divalent ion mercury Hg in flue gas2+With higher absorption efficiency, can be with
Simultaneously desulfuration demercuration is realized, but be there is problems using existing Limestone-gypsum Wet Flue Gas Desulfurization Process system demercuration：First,
Because the Elemental Mercury in flue gas is insoluble in water, in the presence of the mercury in flue gas is more in Elemental Mercury form, the demercuration efficiency of the method is not
It is high；Second, absorbing divalent ion mercury in desulfurizer slurry easily by the metal ions such as iron, manganese, nickel and sulfite ion
Reduction, and flue gas is reentered with the form of Elemental Mercury, so as to reduce the efficiency of the actual removal of mercury；Third, into desulfurization wastewater
Or the mercury in desulfurization slag still suffers from the possibility of secondary pollution.Therefore, the demercuration energy of Limestone-gypsum Wet Flue Gas Desulfurization Process system is improved
Power, while the reduction of divalent ion mercury is reduced, and the mercury to trapping rationally is processed, and is allowed to form stable, low toxicity
Material, is the key problem for needing to solve.
The Chinese invention patent application prospectus of Publication No. CN1923337A describe a kind of using ozone O3Make
For oxidant simultaneous oxidation sulfur dioxide SO2, nitric oxide NO and Elemental Mercury Hg0 then using the simultaneously desulfurization of alkali liquid washing tower,
Denitration and the method for demercuration, but the method does not solve absorbed divalent ion mercury Hg2+Reduction problem in scrubbing tower, its
Actual demercuration efficiency is not high, while using ozone O3 by sulfur dioxide SO2It is oxidized to sulfur trioxide SO3It is unfavorable for desulfurization on the contrary, this
It is because sulfur trioxide SO3Tiny aerosol particle is easily formed in scrubbing tower, prevents to absorb slurries and sulfur trioxide SO3
Further reaction.
With the development of society, the environmental consciousness of people is more and more stronger, and the increasing of Environmental protection, state
Family is also higher for industrial gas emission standard；So existing waste gas discharge processing requirement is also higher, especially for pottery
For porcelain manufacturing enterprise, the exhaust emission that waste gas discharge is produced is more, and substantial amounts of powder is produced in mist projection granulating tower and kiln
Dirt and sulfur-bearing composition；So waste gas needs first to be processed before discharge.The equipment of existing dedusting and desulfurization is to separate
, usually using two equipment of mist projection granulating tower flue gas bag-type dust and desulfurizing tower, entered by the way of desulfurization after first dedusting
Row exhaust-gas treatment；And be a kiln or spray tower one dust-removal cloth-bag of correspondence, and existing sulfur method is wet desulphurization,
Using calcium bicarbonate as desulphurization reaction thing.
The content of the invention
The present invention proposes a kind of ceramic industry kiln desulfuration processing method, and the desulfuration processing method can effectively remove flue gas
In hydrogen halides, improve desulfurizing tower desulfuration efficiency, extend desulfurizing tower service life.
The technical scheme is that what is be achieved in that：
A kind of ceramic industry kiln desulfuration processing method, comprises the following steps：
1) from electrostatic precipitator flue gas out Jing after booster fan boosting cooling dehalogenation is carried out first, i.e., using alkali lye
HF, HCl gas and bulky grain flue dust in flue gas is removed substantially, while being arrived cigarette temperature drop by alkali lye and technique evaporation of water
Less than 160 DEG C, the alkali lye is the solution that boiler ash wash slag water and magnesia are dissolved in water；
2) flue gas after cooling dehalogenation is entered into desulfurizing tower by flue gas heater, the desulfurizing tower from top to bottom sets successively
Demister, ultraviolet generator, spraying layer, flue gas input area and alkali lye Chi Qu are equipped with, flue gas enters desulfurization by flue gas input area
Tower, the SO in flue gas2With the alkaline reaction in desulfurizing tower；
3) demisting process is carried out to the flue gas through desulphurization reaction, drop entrained in flue gas is removed, while isolating
Clean flue gas.
Further, the step 1) in cooling dehalogenation process one cooling defluorinate device in carry out.
Further, the step 2) in ultraviolet generator be to produce ozone, to unreacted completely SO2Aoxidized again
Desulfurization is carried out with alkaline reaction.
Further, the step 2) in alkali lye include by one kind or many of lime stone, white lime, sodium base, magnesium-based and ammonium
Plant the aqueous solution or slurries that alkali compounds is configured to.
Beneficial effects of the present invention：
1st, different from fire coal boiler fume, according to the difference of sintering deposit, tens are contained even in per cubic metre of sintering flue gas
Hundreds of milligram of HF gases.HF gas attacks are extremely strong, and being dissolved in the hydrofluoric acid generated after water can be to desulfurizing tower inner member and anti-corrosion
Material produces serious corrosion, especially big to the destructiveness of glass-reinforced plastic material, and with boiler ash wash slag water and magnesia water is dissolved in
Solution as alkali lye needed for dehalogenation, can effectively remove HF.Because the HCl gases in flue gas also have high solubility,
Therefore when defluorinate is cooled down, most HCl is removed, while removing oarse-grained flue dust.
2nd, desulfurizing tower is improved, ultraviolet generator is provided between demister and spraying zone, on the one hand by purple
(photocatalyst of oxidation) is irradiated in outside line, through the flue gas that spray process is given off, make in flue gas most Elemental Mercury Hg0 with
There is sufficient oxidation reaction in sulfur dioxide, oxygen, generate solid phase mercury compound mereurous sulfate and mercury oxide, on the other hand produce
Ozone can completely oxidizing sulfur dioxide claims sulfur trioxide by unreacted, while turn avoid three oxidations in scrubbing tower content
Easily form tiny aerosol particle (impact alkali liquor absorption).
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the process system sketch of ceramic industry kiln desulfuration processing method of the present invention.
Accompanying drawing is identified：1st, boiler, 2, electrostatic precipitator, 3, booster fan, 4, cooling defluorinate device, 5, alkali lye pond, 6, flue gas
Heater, 7, desulfurizing tower, 8, air supply system, 9, lime stone slurry make-up system, 10, circulating pump, 11, air-introduced machine, 12, cigarette
Chimney, 71, demister, 72, ultraviolet generator, 73, spraying zone, 74, flue gas input area, 75, alkali lye Chi Qu.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
With reference to Fig. 1, a kind of ceramic industry kiln desulfuration processing method is comprised the following steps：
1) from the flue gas out of electrostatic precipitator 2 Jing after the boosting of booster fan 3, carry out being taken off by cooling down defluorinate device 4 first
Halogen, i.e., substantially removed HF, HCl gas and bulky grain flue dust in flue gas using alkali lye, while by alkali lye and fresh water (FW)
By cigarette temperature drop to less than 160 DEG C, the alkali lye is the solution that boiler ash wash slag water and magnesia are dissolved in water for evaporation.
Alkali lye needed for the solution as dehalogenation of water is dissolved in using boiler ash wash slag water and magnesia in this step, can be effective
Remove HF.Because the HCl gases in flue gas also have high solubility, therefore most HCl is able to when defluorinate is cooled down
Remove, while removing oarse-grained flue dust.
2) will cooling dehalogenation after flue gas by flue gas heater 6 enter desulfurizing tower 7, the desulfurizing tower 7 from top to bottom according to
Secondary to be provided with demister 71, ultraviolet generator 72, spraying layer 73, flue gas input area 74 and alkali lye pond area 75, flue gas is by flue gas
Input area 74 enters desulfurizing tower, the SO in flue gas2With the alkaline reaction in desulfurizing tower 7；Alkali lye is included by stone in alkali lye pond area 75
The aqueous solution or slurries that one or more alkali compounds such as lime stone, white lime, sodium base, magnesium-based and ammonium is configured to.
3) demisting process is carried out to the flue gas through desulphurization reaction, drop entrained in flue gas is removed, while isolating
Clean flue gas.
The process system of the present embodiment is specially：
Boiler 1 carries out dedusting by electrostatic precipitator 2, then the flue gas of dedusting is entered into cooling by booster fan 3
In defluorinate device 4, cooling defluorinate device 4 is connected with alkali lye pond 5, interior in alkali lye pond 5 to have boiler ash wash slag water and magnesia to be dissolved in water
Solution, removed with HF, HCl gas reaction in flue gas.Flue gas after dehalogenation adds device 6 to enter desulfurizing tower through flue gas
7 flue gas input area 74, the bottom of desulfurizing tower 7 is also associated with air supply system 8 and lime stone slurry make-up system 9.Desulfurization
Realize that gypsum is circulated by circulating pump 10 and spraying zone 73 in alkali lye pond area 75 in tower 7.Through the flue gas that demister 71 was processed,
Need to be entered in chimney 12 by air-introduced machine 11 after flue gas heater 6 is heated to 80 DEG C.Processed through the system
Flue gas, desulfurization degree reaches 98.5%, and the content detection of hydrogen fluoride and hydrogen chloride out (does not illustrate that its content is extremely low) in flue gas.
Presently preferred embodiments of the present invention is the foregoing is only, not to limit the present invention, all essences in the present invention
Within god and principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (4)
1. a kind of ceramic industry kiln desulfuration processing method, it is characterised in that comprise the following steps：
1) cooling dehalogenation is carried out first Jing after booster fan boosting from electrostatic precipitator flue gas out, i.e., using alkali lye by cigarette
HF, HCl gas and bulky grain flue dust in gas is removed substantially, while passing through alkali lye and technique evaporation of water by cigarette temperature drop to 160
Below DEG C, the alkali lye is the solution that boiler ash wash slag water and magnesia are dissolved in water；
2) flue gas after cooling dehalogenation is entered into desulfurizing tower by flue gas heater, the desulfurizing tower is from top to bottom disposed with
Demister, ultraviolet generator, spraying layer, flue gas input area and alkali lye Chi Qu, flue gas enters desulfurizing tower, cigarette by flue gas input area
SO in gas2With the alkaline reaction in desulfurizing tower；
3) demisting process is carried out to the flue gas through desulphurization reaction, drop entrained in flue gas is removed, while isolating cleaning
Flue gas.
2. ceramic industry kiln desulfuration processing method according to claim 1, it is characterised in that the step 1) in it is cold
But dehalogenation process is carried out in a cooling defluorinate device.
3. ceramic industry kiln desulfuration processing method according to claim 1, it is characterised in that the step 2) in purple
Outer generator is to produce ozone, to unreacted completely SO2Aoxidized carries out desulfurization with alkaline reaction again.
4. the ceramic industry kiln desulfuration processing method according to claim 1 or 3, it is characterised in that the step 2) in
Alkali lye include the aqueous solution being configured to by one or more alkali compounds of lime stone, white lime, sodium base, magnesium-based and ammonium or
Slurries.
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Denomination of invention: Desulfurization treatment methods for ceramic industry kilns Effective date of registration: 20231229 Granted publication date: 20200124 Pledgee: Shandong Juye Rural Commercial Bank Co.,Ltd. Pledgor: SHANDONG HAILIN ENVIRONMENTAL PROTECTION EQUIPMENT ENGINEERING Co.,Ltd. Registration number: Y2023980075418 |
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