CN106621753B - Desulfurization treatment method for ceramic industrial kiln - Google Patents
Desulfurization treatment method for ceramic industrial kiln Download PDFInfo
- Publication number
- CN106621753B CN106621753B CN201611219566.9A CN201611219566A CN106621753B CN 106621753 B CN106621753 B CN 106621753B CN 201611219566 A CN201611219566 A CN 201611219566A CN 106621753 B CN106621753 B CN 106621753B
- Authority
- CN
- China
- Prior art keywords
- flue gas
- alkali liquor
- desulfurization
- desulfurizing tower
- treatment method
- 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.)
- Active
Links
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 36
- 230000023556 desulfurization Effects 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000000919 ceramic Substances 0.000 title claims abstract description 13
- 239000003546 flue gas Substances 0.000 claims abstract description 72
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 68
- 239000003513 alkali Substances 0.000 claims abstract description 32
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000001816 cooling Methods 0.000 claims abstract description 17
- 239000000428 dust Substances 0.000 claims abstract description 16
- 238000005695 dehalogenation reaction Methods 0.000 claims abstract description 11
- 238000005507 spraying Methods 0.000 claims abstract description 8
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 7
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 7
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000002893 slag Substances 0.000 claims abstract description 7
- 238000005406 washing Methods 0.000 claims abstract description 7
- 238000006243 chemical reaction Methods 0.000 claims abstract description 5
- 238000001704 evaporation Methods 0.000 claims abstract description 4
- 230000008020 evaporation Effects 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims abstract description 4
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims description 14
- 229910000040 hydrogen fluoride Inorganic materials 0.000 claims description 12
- 239000007789 gas Substances 0.000 claims description 10
- 239000000243 solution Substances 0.000 claims description 10
- 239000002002 slurry Substances 0.000 claims description 7
- 239000002245 particle 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
- 239000006028 limestone Substances 0.000 claims description 5
- 239000000779 smoke Substances 0.000 claims description 5
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical group 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 group [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-O ammonium group Chemical group [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 3
- 239000007864 aqueous solution Substances 0.000 claims description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 3
- 239000000920 calcium hydroxide Substances 0.000 claims description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 3
- 235000011116 calcium hydroxide Nutrition 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
- 229910000039 hydrogen halide Inorganic materials 0.000 abstract description 2
- 239000012433 hydrogen halide Substances 0.000 abstract description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 16
- 229910052753 mercury Inorganic materials 0.000 description 14
- RAHZWNYVWXNFOC-UHFFFAOYSA-N sulfur dioxide Inorganic materials O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 14
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 description 11
- 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
- 238000007254 oxidation reaction Methods 0.000 description 5
- 239000010440 gypsum Substances 0.000 description 4
- 229910052602 gypsum Inorganic materials 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 239000002912 waste gas Substances 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000002585 base Substances 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000000443 aerosol Substances 0.000 description 2
- 238000006115 defluorination reaction Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
- 230000003179 granulation Effects 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 235000015424 sodium Nutrition 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 239000012670 alkaline solution Substances 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
- 239000003518 caustics Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000002440 industrial waste Substances 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
- 229940100892 mercury compound Drugs 0.000 description 1
- -1 mercury compound mercurous sulfate Chemical class 0.000 description 1
- 229910000474 mercury oxide Inorganic materials 0.000 description 1
- 229910000371 mercury(I) sulfate 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
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 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
- 239000000376 reactant Substances 0.000 description 1
- 238000005201 scrubbing Methods 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Images
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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/80—Type of catalytic reaction
- B01D2255/802—Photocatalytic
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Biomedical Technology (AREA)
- Toxicology (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention provides a desulfurization treatment method for a ceramic industrial kiln, which comprises the following steps: 1) after the pressure of the flue gas from the electrostatic dust collector is increased by a booster fan, firstly, cooling and dehalogenating by using alkali liquor, and simultaneously, reducing the temperature of the flue gas to below 160 ℃ by evaporation of the alkali liquor and process water, wherein the alkali liquor is boiler ash washing slag water and a solution of magnesium oxide dissolved in water; 2) the flue gas after cooling and dehalogenation enters a desulfurizing tower through a flue gas heater, the desulfurizing tower is sequentially provided with a demister, an ultraviolet generator, a spraying layer, a flue gas input area and an alkali liquor pool area from top to bottom, the flue gas enters the desulfurizing tower from the flue gas input area, and SO in the flue gas2Reacting with alkali liquor in the desulfurizing tower; 3) and demisting the flue gas subjected to desulfurization reaction to remove liquid drops carried in the flue gas and separate clean flue gas. The desulfurization treatment method can effectively remove the hydrogen halide in the flue gas, improve the desulfurization efficiency of the desulfurization tower and prolong the service life of the desulfurization tower.
Description
Technical Field
The invention belongs to the technical field of desulfurization, and particularly relates to a desulfurization treatment method for a ceramic industrial kiln.
Background
SO2Is a global atmospheric pollutant due to SO2The environmental pollution problems such as acid rain and the like caused by the large amount of emission are very serious. SO of China2The emission source mainly comprises a coal-fired thermal power plant, a coal-fired industrial boiler and other industrial and civil facilities, wherein SO generated by the coal-fired industrial boiler2The emission occupies national SO230 percent of the total emission, therefore, the development and the application of the complete set of the flue gas desulfurization technology of the coal-fired industrial boiler are necessary. The flue gas of the coal-fired boiler not only contains SO2Further, hydrogen fluoride, mercury and the like are contained.
Limestone-gypsum wet desulphurization system for bivalent ion mercury Hg in flue gas2+The absorption efficiency is high, and the desulfurization and demercuration can be realized at the same time, but the demercuration of the existing limestone-gypsum wet desulfurization system has the following problems: firstly, because the elementary mercury in the flue gas is difficult to dissolve in water, when the mercury in the flue gas exists in the form of the elementary mercury, the mercury removal method is used for removing mercuryThe efficiency is not high; secondly, divalent ion mercury absorbed into the desulfurizer slurry is easily reduced by metal ions such as iron, manganese, nickel and the like and sulfite ions, and reenters the flue gas in the form of elemental mercury, so that the actual mercury removal efficiency is reduced; thirdly, the mercury entering the desulfurization waste water or the desulfurization slag still has the possibility of secondary pollution. Therefore, the core problem to be solved is to improve the mercury removal capability of the limestone-gypsum wet desulphurization system, reduce the reduction of divalent ion mercury, and reasonably treat the trapped mercury to form stable and low-toxicity substances.
The Chinese patent application publication No. CN1923337A discloses a method for producing ozone O3As an oxidant for simultaneous oxidation of sulfur dioxide SO2Nitric oxide NO and elemental mercury Hg0, then simultaneously desulfurising, denitriding and demercurating using a caustic scrubber, but this method does not address the absorbed divalent ionic mercury Hg2+The reduction problem in the washing tower is low in actual demercuration efficiency, and simultaneously, ozone O3 is utilized to remove sulfur dioxide SO2By oxidation to sulfur trioxide SO3But is disadvantageous for desulfurization because sulfur trioxide, SO3Fine aerosol particles are easily formed in the washing tower to prevent the absorption of the slurry and sulfur trioxide (SO)3Further reaction of (3).
Along with the development of society, people have stronger environmental awareness and the national environment protection is stronger, so the national industrial waste gas emission standard is higher; therefore, the requirement of the existing waste gas emission treatment is higher, especially for ceramic manufacturing enterprises, the waste gas emission generates more waste gas pollutants, and a large amount of dust and sulfur-containing components are generated in a spray granulation tower and a kiln; the exhaust gas needs to be treated before being discharged. The existing dust removal and desulfurization equipment is separated, and generally adopts two equipment, namely a spray granulation tower flue gas bag dust removal equipment and a desulfurization tower, and adopts a mode of removing dust firstly and then desulfurizing to perform waste gas treatment; and one kiln or spray tower corresponds to one dust removal cloth bag, and the existing desulfurization method is wet desulfurization, and calcium bicarbonate is adopted as a desulfurization reactant.
Disclosure of Invention
The invention provides a desulfurization treatment method for a ceramic industrial kiln, which can effectively remove hydrogen halide in flue gas, improve the desulfurization efficiency of a desulfurization tower and prolong the service life of the desulfurization tower.
The technical scheme of the invention is realized as follows:
a desulfurization treatment method for a ceramic industrial kiln comprises the following steps:
1) after the pressure of the flue gas from the electrostatic dust collector is increased by a booster fan, cooling and dehalogenation are firstly carried out, namely HF (hydrogen fluoride), HCl gas and large-particle smoke dust in the flue gas are basically removed by using alkali liquor, and simultaneously, the temperature of the flue gas is reduced to below 160 ℃ by evaporation of the alkali liquor and process water, wherein the alkali liquor is boiler ash washing slag water and a solution of magnesium oxide dissolved in water;
2) the flue gas after cooling and dehalogenation enters a desulfurizing tower through a flue gas heater, the desulfurizing tower is sequentially provided with a demister, an ultraviolet generator, a spraying layer, a flue gas input area and an alkali liquor pool area from top to bottom, the flue gas enters the desulfurizing tower from the flue gas input area, and SO in the flue gas2Reacting with alkali liquor in the desulfurizing tower;
3) and demisting the flue gas subjected to desulfurization reaction to remove liquid drops carried in the flue gas and separate clean flue gas.
Further, the cooling dehalogenation process in the step 1) is carried out in a cooling defluorinating device.
Further, the ultraviolet generator in the step 2) is used for generating ozone to react with unreacted SO completely2Oxidizing and then reacting with alkali liquor to desulfurize.
Further, the alkali liquor in step 2) comprises an aqueous solution or slurry prepared by one or more alkaline compounds of limestone, slaked lime, sodium base, magnesium base and ammonium base.
The invention has the beneficial effects that:
1. different from coal-fired boiler flue gas, each cubic meter of sintering flue gas contains dozens of even hundreds of milligrams of HF gas according to different sintering ores. HF gas has extremely strong corrosivity, hydrofluoric acid generated after being dissolved in water can severely corrode components and anticorrosive materials in the desulfurizing tower, the destructiveness to glass fiber reinforced plastic materials is particularly high, and the solution of boiler ash slag flushing water and magnesium oxide dissolved in water is used as alkali liquor required by dehalogenation, so that HF can be effectively removed. Because the HCl gas in the flue gas also has extremely high solubility, most HCl is removed during cooling and defluorination, and large-particle smoke is removed at the same time.
2. Improve the desulfurizing tower, be provided with ultraviolet generator between defroster and spraying area, pass through ultraviolet irradiation (the photocatalyst of oxidation) on the one hand, through spraying the flue gas that handles to discharge out, make most elementary substance mercury Hg0 and sulfur dioxide in the flue gas, oxygen take place abundant oxidation reaction, generate solid phase mercury compound mercurous sulfate and mercury oxide, the ozone that on the other hand produced can be called sulfur trioxide with the sulfur dioxide oxidation that does not react completely, avoided the trioxide to form tiny aerosol granule (influence alkali lye absorption) again easily in the scrubbing tower simultaneously.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a process system diagram of the desulfurization treatment method of the ceramic industrial kiln.
The attached drawings are as follows: 1. the system comprises a boiler, 2, an electrostatic dust collector, 3, a booster fan, 4, a cooling defluorinating device, 5, an alkali liquor pool, 6, a flue gas heater, 7, a desulfurizing tower, 8, an air supply system, 9, a limestone slurry supply system, 10, a circulating pump, 11, an induced draft fan, 12, a chimney, 71, a demister, 72, an ultraviolet generator, 73, a spraying area, 74, a flue gas input area, 75 and an alkali liquor pool area.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a desulfurization treatment method for a ceramic industrial kiln comprises the following steps:
1) after the pressure of the flue gas from the electrostatic dust collector 2 is increased by a booster fan 3, firstly, dehalogenation is carried out by a cooling defluorinating device 4, namely, HF, HCl gas and large-particle smoke dust in the flue gas are basically removed by using alkali liquor, and simultaneously, the temperature of the flue gas is reduced to below 160 ℃ by evaporation of the alkali liquor and process water, wherein the alkali liquor is boiler ash washing water and a solution of magnesium oxide dissolved in water.
In the step, the boiler ash slag flushing water and the solution of magnesium oxide dissolved in water are used as alkali liquor required by dehalogenation, so that HF can be effectively removed. Because the HCl gas in the flue gas also has extremely high solubility, most HCl is removed during cooling and defluorination, and large-particle smoke is removed at the same time.
2) The flue gas after cooling and dehalogenation enters a desulfurizing tower 7 through a flue gas heater 6, the desulfurizing tower 7 is sequentially provided with a demister 71, an ultraviolet generator 72, a spraying layer 73, a flue gas input area 74 and an alkali liquor pool area 75 from top to bottom, the flue gas enters the desulfurizing tower from the flue gas input area 74, and SO in the flue gas2Reacting with alkali liquor in the desulfurizing tower 7; the alkaline solution in the alkaline pool zone 75 comprises an aqueous solution or slurry prepared from one or more alkaline compounds such as limestone, slaked lime, sodium-based, magnesium-based, and ammonium-based.
3) And demisting the flue gas subjected to desulfurization reaction to remove liquid drops carried in the flue gas and separate clean flue gas.
The process system of the embodiment specifically comprises:
the boiler 1 removes dust through the electrostatic dust collector 2, then the flue gas after dust removal enters the cooling defluorinating device 4 through the booster fan 3, the cooling defluorinating device 4 is connected with the alkali liquor pool 5, the solution of boiler ash washing slag water and magnesium oxide dissolved in water is arranged in the alkali liquor pool 5, and the solution reacts with HF and HCl gas in the flue gas to be removed. The dehalogenated flue gas enters a flue gas input area 74 of a desulfurizing tower 7 through a flue gas feeder 6, and the bottom of the desulfurizing tower 7 is also connected with an air supply system 8 and a limestone slurry supply system 9. The alkali liquor pool area 75 in the desulfurizing tower 7 realizes gypsum circulation through the circulating pump 10 and the spraying area 73. The flue gas treated by the demister 71 needs to be heated to 80 ℃ by the flue gas heater 6 and then can be discharged into the chimney 12 by the induced draft fan 11. The desulfurization rate of the flue gas treated by the system reaches 98.5%, and the content of hydrogen fluoride and hydrogen chloride in the flue gas cannot be detected (indicating that the content is extremely low).
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (4)
1. The desulfurization treatment method for the ceramic industrial kiln is characterized by comprising the following steps of:
1) after the pressure of the flue gas from the electrostatic dust collector is increased by a booster fan, cooling and dehalogenation are firstly carried out, namely HF (hydrogen fluoride), HCl gas and large-particle smoke dust in the flue gas are basically removed by using alkali liquor, and simultaneously, the temperature of the flue gas is reduced to below 160 ℃ by evaporation of the alkali liquor and process water, wherein the alkali liquor is boiler ash washing slag water and a solution of magnesium oxide dissolved in water;
2) the flue gas after cooling and dehalogenation enters a desulfurizing tower through a flue gas heater, the desulfurizing tower is sequentially provided with a demister, an ultraviolet generator, a spraying layer, a flue gas input area and an alkali liquor pool area from top to bottom, the flue gas enters the desulfurizing tower from the flue gas input area, and SO in the flue gas2Reacting with alkali liquor in the desulfurizing tower;
3) and demisting the flue gas subjected to desulfurization reaction to remove liquid drops carried in the flue gas and separate clean flue gas.
2. The desulfurization treatment method for ceramic industrial kilns as set forth in claim 1, wherein the cooling dehalogenation process in the step 1) is performed in a cooling defluorinating device.
3. The desulfurization treatment method for ceramic industrial kilns as claimed in claim 1, wherein the ultraviolet generator in step 2) is used for generating ozone for completely reacting SO2Oxidizing and then reacting with alkali liquor to desulfurize.
4. The ceramic industrial kiln desulfurization treatment method according to claim 1 or 3, wherein the alkali solution in the step 2) includes an aqueous solution or slurry configured of one or more alkaline compounds of limestone, slaked lime, sodium group, magnesium group, and ammonium group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611219566.9A CN106621753B (en) | 2016-12-26 | 2016-12-26 | Desulfurization treatment method for ceramic industrial kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611219566.9A CN106621753B (en) | 2016-12-26 | 2016-12-26 | Desulfurization treatment method for ceramic industrial kiln |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106621753A CN106621753A (en) | 2017-05-10 |
| CN106621753B true CN106621753B (en) | 2020-01-24 |
Family
ID=58827506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611219566.9A Active CN106621753B (en) | 2016-12-26 | 2016-12-26 | Desulfurization treatment method for ceramic industrial kiln |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106621753B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101053750A (en) * | 2007-02-09 | 2007-10-17 | 浙江大学 | Flue gas combined desulfurization and denitration method |
| CN101168118A (en) * | 2006-10-25 | 2008-04-30 | 宝山钢铁股份有限公司 | Sintering smoke wet method sulphur removing and dust removing technology |
| CN101822937A (en) * | 2010-05-11 | 2010-09-08 | 武汉科技学院 | Method for synchronous desulfurization and denitrification of marine vessel exhaust |
| CN202096874U (en) * | 2011-02-25 | 2012-01-04 | 东南大学 | Flue gas purification device based on advanced oxidization combined with wet washing |
| CN103055675A (en) * | 2013-01-18 | 2013-04-24 | 大恩(天津)环境技术研发有限公司 | Industrial smoke comprehensive treatment system and method based on advanced oxidation |
| CN203916392U (en) * | 2014-05-08 | 2014-11-05 | 曹润塬 | A kind of can free customized type multifunctional modular gas cleaning plant |
| CN106000047A (en) * | 2016-06-20 | 2016-10-12 | 安庆宜源石油机械配件制造有限责任公司 | Peculiar smell purifier for petrochemical plant |
-
2016
- 2016-12-26 CN CN201611219566.9A patent/CN106621753B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101168118A (en) * | 2006-10-25 | 2008-04-30 | 宝山钢铁股份有限公司 | Sintering smoke wet method sulphur removing and dust removing technology |
| CN101053750A (en) * | 2007-02-09 | 2007-10-17 | 浙江大学 | Flue gas combined desulfurization and denitration method |
| CN101822937A (en) * | 2010-05-11 | 2010-09-08 | 武汉科技学院 | Method for synchronous desulfurization and denitrification of marine vessel exhaust |
| CN202096874U (en) * | 2011-02-25 | 2012-01-04 | 东南大学 | Flue gas purification device based on advanced oxidization combined with wet washing |
| CN103055675A (en) * | 2013-01-18 | 2013-04-24 | 大恩(天津)环境技术研发有限公司 | Industrial smoke comprehensive treatment system and method based on advanced oxidation |
| CN203916392U (en) * | 2014-05-08 | 2014-11-05 | 曹润塬 | A kind of can free customized type multifunctional modular gas cleaning plant |
| CN106000047A (en) * | 2016-06-20 | 2016-10-12 | 安庆宜源石油机械配件制造有限责任公司 | Peculiar smell purifier for petrochemical plant |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106621753A (en) | 2017-05-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101352644B (en) | Wet flue gas denitration technique for nitrite recovery | |
| US10835862B2 (en) | Air pollution control system and method | |
| CN102489132B (en) | Novel dual-alkali desulfurization method for removal of sulfur dioxide from flue gas and generation of elemental sulfur as byproduct | |
| AU2008331589B2 (en) | Process for promoting mercury retention in wet flue gas desulfurization systems | |
| CN101352642A (en) | Flue gas desulfurization system by lime-sodium alkaline method | |
| CN102205203A (en) | Desulfuration and mercury-removing combined smoke purifying process and system based on magnesium oxide method desulfuration process | |
| JP2009220021A (en) | Wet-type flue gas desulfurization apparatus | |
| CN101590369B (en) | Mercury removal process based on lime-gypsum method desulphurization system and mercury removal absorption liquid | |
| JP2013039511A (en) | Wet type flue-gas desulfurization apparatus and thermal power plant having the same | |
| CN105107373B (en) | Composite desulfurizer for oxidizing elemental mercury and removing HCl and preparation method thereof | |
| CN110479057A (en) | A kind of method of chemical oxidation absorbing treating smoke pollutant | |
| CN109985509A (en) | A kind of zinc oxide method form waste gas of sulfur dioxide treatment process | |
| CN103007718A (en) | Wet redox, desulfuration and resource utilization method for flue gas | |
| CN202860378U (en) | Smoke forced oxidation desulfurization and denitrification integrated device | |
| CN104324585A (en) | Method for purifying blast furnace flue gas by using ionic liquid | |
| CN103505997B (en) | A kind of flue gas multiple pollutant efficient synergistic purification method and application thereof | |
| CN107042052A (en) | A kind of dry desulfurization denitrification integral handling process | |
| CN106512611A (en) | Method for desulfurizing and treating flue gas from boiler of thermal power plant | |
| CN104437031A (en) | Iron smelting flue gas treatment method | |
| CN106621753B (en) | Desulfurization treatment method for ceramic industrial kiln | |
| CN104941417A (en) | Flue gas treatment device and method | |
| CN104548877A (en) | Preparation method of compound absorbent capable of realizing desulfurization and denitrification simultaneously | |
| CN102688677B (en) | Method for enhancing total mercury recovery rate of metallurgical fume by reducing bivalent mercury | |
| KR102349120B1 (en) | Exhaust gas purifying agent and exhaust gas purifying method using the same | |
| CN106582246A (en) | Carbide slag wet-method flue gas simultaneous desulfurization and denitrification process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20191230 Address after: 274900 Tianzhuang Town Industrial Park, Juye County, Heze City, Shandong Province (South S254 Road East, Nanyu Village) Applicant after: SHANDONG HAILIN ENVIRONMENTAL PROTECTION EQUIPMENT ENGINEERING Co.,Ltd. Address before: No. 1003 Huizhou Avenue in Baohe District of Hefei city of Anhui Province in 230000 Applicant before: HEFEI TIANXIANG ENVIROMENT PROJECT Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
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 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |