WO2014133016A1 - Filter cloth for bag filter, and bag filter device including same - Google Patents
Filter cloth for bag filter, and bag filter device including same Download PDFInfo
- Publication number
- WO2014133016A1 WO2014133016A1 PCT/JP2014/054717 JP2014054717W WO2014133016A1 WO 2014133016 A1 WO2014133016 A1 WO 2014133016A1 JP 2014054717 W JP2014054717 W JP 2014054717W WO 2014133016 A1 WO2014133016 A1 WO 2014133016A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- filter cloth
- filter
- bag filter
- bag
- cloth
- Prior art date
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- 239000004744 fabric Substances 0.000 title claims abstract description 211
- 239000003054 catalyst Substances 0.000 claims abstract description 62
- 150000002013 dioxins Chemical class 0.000 claims abstract description 58
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 claims abstract description 58
- KVGZZAHHUNAVKZ-UHFFFAOYSA-N 1,4-Dioxin Chemical compound O1C=COC=C1 KVGZZAHHUNAVKZ-UHFFFAOYSA-N 0.000 claims abstract 4
- 239000000835 fiber Substances 0.000 claims description 48
- 239000000126 substance Substances 0.000 claims description 34
- 239000003365 glass fiber Substances 0.000 claims description 23
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 17
- 229910052731 fluorine Inorganic materials 0.000 claims description 17
- 239000011737 fluorine Substances 0.000 claims description 17
- 150000003377 silicon compounds Chemical class 0.000 claims description 16
- 238000001914 filtration Methods 0.000 claims description 11
- 239000002245 particle Substances 0.000 claims description 11
- 230000009467 reduction Effects 0.000 claims description 11
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 9
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 9
- 230000035699 permeability Effects 0.000 claims description 7
- 231100000419 toxicity Toxicity 0.000 claims description 5
- 230000001988 toxicity Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 15
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 178
- 239000007789 gas Substances 0.000 description 80
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 32
- 239000010410 layer Substances 0.000 description 26
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 18
- 239000000463 material Substances 0.000 description 18
- GNTDGMZSJNCJKK-UHFFFAOYSA-N divanadium pentaoxide Chemical compound O=[V](=O)O[V](=O)=O GNTDGMZSJNCJKK-UHFFFAOYSA-N 0.000 description 10
- 238000000354 decomposition reaction Methods 0.000 description 9
- 239000011572 manganese Substances 0.000 description 9
- 239000000428 dust Substances 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- -1 polytetrafluoroethylene Polymers 0.000 description 6
- 239000011550 stock solution Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000001179 sorption measurement Methods 0.000 description 5
- 238000011144 upstream manufacturing Methods 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000006185 dispersion Substances 0.000 description 4
- 229910052748 manganese Inorganic materials 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 150000003071 polychlorinated biphenyls Chemical class 0.000 description 4
- 238000010998 test method Methods 0.000 description 4
- 239000003463 adsorbent Substances 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 230000000185 dioxinlike effect Effects 0.000 description 3
- 239000002612 dispersion medium Substances 0.000 description 3
- TXKMVPPZCYKFAC-UHFFFAOYSA-N disulfur monoxide Inorganic materials O=S=S TXKMVPPZCYKFAC-UHFFFAOYSA-N 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 238000004898 kneading Methods 0.000 description 3
- 238000011068 loading method Methods 0.000 description 3
- 239000003960 organic solvent Substances 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 3
- 231100000331 toxic Toxicity 0.000 description 3
- 230000002588 toxic effect Effects 0.000 description 3
- 239000002759 woven fabric Substances 0.000 description 3
- LGIRBUBHIWTVCK-UHFFFAOYSA-N 1,2,3,7,8,9-Hexachlorodibenzodioxin Chemical compound O1C2=CC(Cl)=C(Cl)C(Cl)=C2OC2=C1C=C(Cl)C(Cl)=C2Cl LGIRBUBHIWTVCK-UHFFFAOYSA-N 0.000 description 2
- OGBQILNBLMPPDP-UHFFFAOYSA-N 2,3,4,7,8-Pentachlorodibenzofuran Chemical compound O1C2=C(Cl)C(Cl)=C(Cl)C=C2C2=C1C=C(Cl)C(Cl)=C2 OGBQILNBLMPPDP-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 239000004734 Polyphenylene sulfide Substances 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 231100000770 Toxic Equivalency Factor Toxicity 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 150000004826 dibenzofurans Chemical class 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 2
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- 150000002484 inorganic compounds Chemical class 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- OKKJLVBELUTLKV-UHFFFAOYSA-N methanol Substances OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical compound O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 description 2
- 239000004745 nonwoven fabric Substances 0.000 description 2
- VASIZKWUTCETSD-UHFFFAOYSA-N oxomanganese Chemical compound [Mn]=O VASIZKWUTCETSD-UHFFFAOYSA-N 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 229920000069 polyphenylene sulfide Polymers 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 238000007581 slurry coating method Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 229910001930 tungsten oxide Inorganic materials 0.000 description 2
- ZNOKGRXACCSDPY-UHFFFAOYSA-N tungsten trioxide Chemical compound O=[W](=O)=O ZNOKGRXACCSDPY-UHFFFAOYSA-N 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- FOIBFBMSLDGNHL-UHFFFAOYSA-N 1,2,3,4,6,7,8,9-Octachlorodibenzo-p-dioxin Chemical compound ClC1=C(Cl)C(Cl)=C2OC3=C(Cl)C(Cl)=C(Cl)C(Cl)=C3OC2=C1Cl FOIBFBMSLDGNHL-UHFFFAOYSA-N 0.000 description 1
- RHIROFAGUQOFLU-UHFFFAOYSA-N 1,2,3,4,6,7,8,9-Octachlorodibenzofuran Chemical compound ClC1=C(Cl)C(Cl)=C2C3=C(Cl)C(Cl)=C(Cl)C(Cl)=C3OC2=C1Cl RHIROFAGUQOFLU-UHFFFAOYSA-N 0.000 description 1
- WCLNVRQZUKYVAI-UHFFFAOYSA-N 1,2,3,4,6,7,8-Heptachlorodibenzodioxin Chemical compound O1C2=C(Cl)C(Cl)=C(Cl)C(Cl)=C2OC2=C1C=C(Cl)C(Cl)=C2Cl WCLNVRQZUKYVAI-UHFFFAOYSA-N 0.000 description 1
- VEZCTZWLJYWARH-UHFFFAOYSA-N 1,2,3,4,7,8,9-Heptachlorodibenzofuran Chemical compound O1C2=C(Cl)C(Cl)=C(Cl)C(Cl)=C2C2=C1C=C(Cl)C(Cl)=C2Cl VEZCTZWLJYWARH-UHFFFAOYSA-N 0.000 description 1
- WCYYQNSQJHPVMG-UHFFFAOYSA-N 1,2,3,4,7,8-Hexachlorodibenzodioxin Chemical compound O1C2=C(Cl)C(Cl)=C(Cl)C(Cl)=C2OC2=C1C=C(Cl)C(Cl)=C2 WCYYQNSQJHPVMG-UHFFFAOYSA-N 0.000 description 1
- LVYBAQIVPKCOEE-UHFFFAOYSA-N 1,2,3,4,7,8-Hexachlorodibenzofuran Chemical compound O1C2=C(Cl)C(Cl)=C(Cl)C(Cl)=C2C2=C1C=C(Cl)C(Cl)=C2 LVYBAQIVPKCOEE-UHFFFAOYSA-N 0.000 description 1
- BKIXWRBZCQEZAQ-UHFFFAOYSA-N 1,2,3,4,7,9-hexachlorodibenzofuran Chemical compound ClC1=C(Cl)C(Cl)=C2C3=C(Cl)C=C(Cl)C=C3OC2=C1Cl BKIXWRBZCQEZAQ-UHFFFAOYSA-N 0.000 description 1
- YCLUIPQDHHPDJJ-UHFFFAOYSA-N 1,2,3,6,7,8-Hexachlorodibenzodioxin Chemical compound O1C2=C(Cl)C(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2Cl YCLUIPQDHHPDJJ-UHFFFAOYSA-N 0.000 description 1
- JEYJJJXOFWNEHN-UHFFFAOYSA-N 1,2,3,6,7,8-Hexachlorodibenzofuran Chemical compound O1C2=C(Cl)C(Cl)=C(Cl)C=C2C2=C1C=C(Cl)C(Cl)=C2Cl JEYJJJXOFWNEHN-UHFFFAOYSA-N 0.000 description 1
- PYUSJFJVDVSXIU-UHFFFAOYSA-N 1,2,3,7,8,9-Hexachlorodibenzofuran Chemical compound O1C2=CC(Cl)=C(Cl)C(Cl)=C2C2=C1C=C(Cl)C(Cl)=C2Cl PYUSJFJVDVSXIU-UHFFFAOYSA-N 0.000 description 1
- FSPZPQQWDODWAU-UHFFFAOYSA-N 1,2,3,7,8-Pentachlorodibenzodioxin Chemical compound O1C2=CC(Cl)=C(Cl)C(Cl)=C2OC2=C1C=C(Cl)C(Cl)=C2 FSPZPQQWDODWAU-UHFFFAOYSA-N 0.000 description 1
- SBMIVUVRFPGOEB-UHFFFAOYSA-N 1,2,3,7,8-Pentachlorodibenzofuran Chemical compound O1C2=CC(Cl)=C(Cl)C(Cl)=C2C2=C1C=C(Cl)C(Cl)=C2 SBMIVUVRFPGOEB-UHFFFAOYSA-N 0.000 description 1
- XTAHLACQOVXINQ-UHFFFAOYSA-N 2,3,4,6,7,8-Hexachlorodibenzofuran Chemical compound ClC1=C(Cl)C=C2C(C=C(C(=C3Cl)Cl)Cl)=C3OC2=C1Cl XTAHLACQOVXINQ-UHFFFAOYSA-N 0.000 description 1
- 229920002972 Acrylic fiber Polymers 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 206010074268 Reproductive toxicity Diseases 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000002939 deleterious effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 231100000386 immunotoxicity Toxicity 0.000 description 1
- 230000007688 immunotoxicity Effects 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 239000012784 inorganic fiber Substances 0.000 description 1
- 238000007561 laser diffraction method Methods 0.000 description 1
- GEYXPJBPASPPLI-UHFFFAOYSA-N manganese(iii) oxide Chemical compound O=[Mn]O[Mn]=O GEYXPJBPASPPLI-UHFFFAOYSA-N 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 150000004045 organic chlorine compounds Chemical class 0.000 description 1
- 150000002896 organic halogen compounds Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 231100000372 reproductive toxicity Toxicity 0.000 description 1
- 230000007696 reproductive toxicity Effects 0.000 description 1
- 238000000790 scattering method Methods 0.000 description 1
- 238000009958 sewing Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000004056 waste incineration Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/32—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond
- D06M11/36—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond with oxides, hydroxides or mixed oxides; with salts derived from anions with an amphoteric element-oxygen bond
- D06M11/44—Oxides or hydroxides of elements of Groups 2 or 12 of the Periodic Table; Zincates; Cadmates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/32—Manganese, technetium or rhenium
- B01J23/34—Manganese
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
- B01J35/58—Fabrics or filaments
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
- B01J35/61—Surface area
- B01J35/615—100-500 m2/g
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/0215—Coating
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/30—Capture or disposal of greenhouse gases of perfluorocarbons [PFC], hydrofluorocarbons [HFC] or sulfur hexafluoride [SF6]
Definitions
- the present invention relates to a filter cloth used for a bag filter and a bag filter device using the same. More specifically, the present invention relates to a filter cloth for treating exhaust gas containing dioxins and a bag filter device using the same.
- Exhaust gas generated from waste incineration facilities that treat industrial waste and municipal waste, as well as exhaust gas generated from steelworks, steelworks, or metal refining plants contain various harmful substances. Typical harmful substances are dust, hydrogen chloride, sulfur oxide (SOx), nitrogen oxide (NOx), and toxic organochlorine compounds such as dioxins and PCBs.
- dioxins exhibit carcinogenic toxicity, reproductive toxicity, and immunotoxicity to the human body, and since they are stable substances, they do not dissolve in water and are semipermanently toxic. .
- the international equivalent equivalent concentration of dioxins after exhaust gas treatment is required to be a predetermined value or less.
- Dioxins in exhaust gas are generally treated by “adsorption removal” or “decomposition removal” performed upstream or downstream of the bag filter.
- “Adsorption removal” uses an adsorbent such as activated carbon, and makes the exhaust gas contact with the adsorbent before or after the bag filter treatment, thereby adsorbing the dioxins onto the adsorbent. Yes.
- the “decomposition removal” uses a catalyst, and the exhaust gas is brought into contact with the catalyst before or after the bag filter treatment, thereby promoting the decomposition reaction of dioxins (for example, FIG. 8). reference).
- the catalyst used for decomposition and removal is used as a honeycomb layer in consideration of the required residence time (the time during which the exhaust gas is in contact with the catalyst), and the exhaust gas is passed through the honeycomb catalyst layer. Dioxins are decomposed together with NOx.
- the catalyst used is generally a denitration catalyst composed of vanadium pentoxide, tungsten oxide, titanium, or the like, or a catalyst in which platinum element is added thereto.
- the above catalyst is preferable in terms of dioxin decomposition and removal efficiency, it is relatively expensive and needs to be used after being molded into a honeycomb or the like from the viewpoint of securing a necessary “residence time (catalyst contact time)”. is there. This is because if sufficient “residence time (catalyst contact time)” cannot be ensured, the desired decomposition and removal rate may not be achieved.
- “dust collection using a bag filter” and “decomposition treatment of harmful substances” are performed in separate steps in the first place. Absent.
- the main object of the present invention is to provide a dioxin removal technique that satisfies both desired dioxin removal efficiency and simple process steps and equipment.
- the present invention provides a filter cloth for a bag filter in which manganese oxide is supported on a filter cloth as a catalyst for reducing dioxin substances in exhaust gas.
- a bag cloth for bag filter carrying a catalyst made of manganese dioxide is provided to reduce dioxin substances in exhaust gas.
- the feature of the filter cloth for bag filter according to the present invention is that manganese oxide such as manganese dioxide used as a catalyst for reducing dioxin substances is provided directly on the filter cloth of the bag filter, and is used alone. It is used in.
- dioxin substances substantially refers to polychlorinated dibenzopararadioxin (PCDD), polychlorinated dibenzofuran (PCDF), and dioxin-like polychlorinated biphenyl (DL-PCB).
- PCDD polychlorinated dibenzopararadioxin
- PCDF polychlorinated dibenzofuran
- DL-PCB dioxin-like polychlorinated biphenyl
- the manganese oxide supported on the filter cloth for bag filter preferably has a specific surface area of 20 m 2 / g to 300 m 2 / g. Further, it is also preferable that the manganese oxide supported on the bag filter cloth has an average particle size of 0.5 ⁇ m to 1.5 ⁇ m.
- the manganese oxide supported on the filter cloth for bag filter may be manganese dioxide.
- Manganese dioxide supported on the filter cloth for bag filter may comprise ⁇ type (epsilon type) as its crystal structure.
- the amount of manganese oxide supported is at least 20 g / m 2 . That is, it is preferable that the amount of manganese oxide provided directly on the bag filter cloth is at least 20 g / m 2 .
- the filter cloth for bag filter has fluorine-based fibers. That is, it is preferable that the cloth itself constituting the bag filter cloth has fluorine-based fibers.
- the fluorine-based fiber is preferably, for example, PTFE fiber (polytetrafluoroethylene fiber).
- the glass fiber may be further contained.
- the filter cloth for a bag filter according to a preferred embodiment has at least both a fluorine-based fiber and a glass fiber (for example, the fineness of the glass fiber is 3 to 15 ⁇ m).
- the bag filter cloth includes a silicon compound. That is, the filter cloth for bag filters of the present invention may have a silicon compound component in addition to the fiber component and the manganese oxide catalyst component.
- the filter cloth for a bag filter according to the present invention has an air permeability of 3 to 15 cm 3 / cm 2 / sec.
- the air permeability of the bag filter filter cloth carrying manganese oxide is preferably 3 to 15 cm 3 / cm 2 / sec.
- the bag filter cloth is relatively thin, for example, the filter cloth has a thickness of 1.5 mm to 5.0 mm. That is, the filter cloth for bag filter carrying manganese oxide preferably has a thickness of 1.5 mm to 5.0 mm.
- the filter cloth for bag filter of the present invention preferably has a reduction rate of toxic equivalent (ng-TEQ / Nm 3 ) of dioxin substances of 45% to 75% under the following conditions: ⁇ Exhaust gas linear velocity: 0.8-1.2m / sec ⁇ Exhaust gas temperature: 100-200 °C ⁇ Dioxin concentration in the exhaust gas before filtration: 1 to 5 ng-TEQ / Nm 3 -Filtration area: 120-160 cm 2
- the present invention also provides a bag filter device having the bag filter cloth described above. That is, this invention provides the bag filter apparatus comprised at least from the hanging tool and housing of a filter cloth other than the said filter cloth for bag filters.
- the filter cloth for bag filter of the present invention can reduce not only dust substances in the exhaust gas passing therethrough but also dioxin substances in the exhaust gas passing therethrough. That is, according to the present invention, dioxin substances can be reduced during the exhaust gas dust collection treatment.
- the dioxin decomposition treatment was carried out in a separate process from the bag filter dust collection treatment, and these can be carried out in one process / equipment, and the exhaust gas treatment process / equipment becomes simple as a whole.
- the catalyst used is not relatively expensive such as vanadium pentoxide, tungsten oxide, titanium and / or platinum, but is manganese dioxide, which is advantageous in terms of material cost.
- the filter cloth for bag filters is thin and has a mesh structure, so “exhaust gas to be treated” will pass through the filter cloth in a short time. Even under the conditions, the concentration of the dioxin substance in the exhaust gas passing therethrough can be reduced. That is, the filter cloth for bag filter of the present invention has a condition that the catalyst contact time is considered to be shorter than that of a conventional honeycomb catalyst layer (catalytic reaction tower) or the like (for example, exhaust gas of the filter cloth for bag filter) The passage time is extremely short, about 1/5 to 1/20 of the exhaust gas passage time of the honeycomb catalyst layer), and the concentration of the dioxin substance in the exhaust gas can be effectively reduced.
- FIG. 3 (a) loading by impregnation in manganese oxide dispersion
- FIG. 3 (b) loading by kneading into fabric base fiber
- FIG. (C) Support by sandwiching slurry coating
- FIG. 3 (d) Support by sandwiching impregnated base fabric
- FIG. 4 (a) pulse jet backwash system
- the filter cloth of the present invention is a bag filter cloth used for exhaust gas treatment. Therefore, the filter cloth of the present invention is generally used in a bag shape or a cylindrical shape. For example, it is used by sewing into a cylindrical shape as shown in FIG. When “exhaust gas containing dust substance” is passed through such a filter cloth, the dust substance is captured by the filter cloth due to the filter action caused by the gap of the cloth, and as a result, the dust substance is extracted from the exhaust gas. Removed.
- the feature of the present invention is that “manganese oxide” is supported as a “catalyst for reducing dioxin substances in exhaust gas” on such a filter cloth for bag filter (see FIG. 2). . That is, in the present invention, the filter cloth for bag filter itself has a catalyst for reducing dioxins. In other words, the present invention does not intend to provide a manganese oxide catalyst for reducing dioxin substances in exhaust gas at a place other than a bag filter filter cloth (hence, for example, manganese oxide). It is not intended to use the catalyst by blowing it into the exhaust gas), but to use manganese oxide (particularly “manganese dioxide” as described later) directly on the filter cloth for the bag filter. Intended.
- oxides such as manganese have an oxidation catalytic ability, and therefore it is known to oxidatively decompose halogenated organic compounds such as dioxins.
- Catalyst contact time was necessary. Therefore, oxides such as manganese are used as a honeycomb layer catalyst in the prior art, or a “residence time (catalyst contact) required by performing a treatment (for example, Japanese Patent Application Laid-Open No. 2005-287759) or the like that is blown into exhaust gas. Time) ”.
- the concentration of dioxins in the exhaust gas can be effectively reduced unexpectedly when manganese oxide is directly used in the bag filter cloth. It was.
- the manganese oxide catalyst that is, the manganese oxide catalyst is a powder material and is difficult to apply to the filter cloth, and the manganese oxide catalyst against exhaust gas that passes through the mesh of the filter cloth in a relatively short time.
- the concentration of dioxins cannot be effectively reduced (for effective reduction of the concentration of dioxins, as disclosed in JP-A-2001-104728, TiO 2 is used as a carrier).
- manganese oxide is directly incorporated into the filter cloth for the bag filter as a catalyst that reduces and reduces only the dioxins among various harmful substances in the exhaust gas. ing.
- only manganese oxide is used as “a catalyst for reducing dioxins in exhaust gas”.
- “only manganese oxide is used (that is, only manganese oxide is supported on the filter cloth for bag filter)” is a catalyst for reducing dioxins contained in exhaust gas. This means that no substance other than manganese oxide is provided on the filter cloth. That is, in order to reduce dioxins, “catalysts other than manganese oxide” are not supported or held on the filter cloth for bag filters.
- manganese oxide is not used in a bag filter cloth in combination with other metals or metal compounds in order to reduce dioxins, and for bag filters.
- Manganese oxide used for the filter cloth is not a compound (for example, complex oxide) containing other elements.
- manganese oxide supported on the filter cloth for bag filters examples include manganese monoxide (MnO), trimanganese tetroxide (Mn 3 O 4 ), manganese dioxide (MnO 2 ), manganese trioxide (MnO 3 ), and dioxide trioxide. At least one selected from the group consisting of manganese (Mn 2 O 3 ), trimanganese tetroxide (Mn 3 O 4 ), pentamanganese tetroxide (Mn 5 O 4 ) and dimanganese heptaoxide (Mn 2 O 7 ) Can be mentioned.
- Manganese dioxide is preferred as the manganese oxide supported on the bag filter cloth according to the present invention.
- the filter cloth for a bag filter according to the present invention it is preferable that only “manganese dioxide” is directly used as “a catalyst for reducing dioxin substances in exhaust gas”.
- the “catalyst made of manganese dioxide” is supported on the filter cloth for bag filter only as “a catalyst for reducing dioxin substances in exhaust gas”. preferable.
- “manganese dioxide” is directly used in the filter cloth for bag filter as a catalyst for decomposing and removing dioxins,
- the catalyst material (catalyst material aiming at dioxin reduction effect) is not used for the filter cloth for bag filters.
- the bag filter carrying the catalyst made of manganese dioxide carries the vanadium pentoxide catalyst that has been continuously used.
- Dioxins can be removed more effectively than a bug filter. That is, the filter cloth for bag filter of the present invention can effectively remove dioxins with a bag filter carrying a catalyst made of manganese dioxide without using a catalyst designated as a deleterious substance. Therefore, the filter cloth for bag filter of the present invention is excellent in that dioxins can be safely removed and the material cost can be suppressed because it is not toxic.
- the filter cloth for bag filter of the present invention can reduce the concentration of dioxin substances contained in the exhaust gas passing through the filter cloth.
- the “dioxin substances” here refers to polychlorinated dibenzoparaffins. It refers essentially to dioxinpox (PCDD), polychlorinated dibenzofuran (PCDF) and dioxin-like polychlorinated biphenyl (DL-PCB).
- PCDD polychlorinated dibenzopararadioxin
- TeCDD for example, 2,3,7,8-TeCDD
- PeCDD for example, 1,2,3,7,8-PeCDD, etc.
- HxCDD eg, 1,2,3,4,7,8-HxCDD, 1,2,3,6,7,8-HxCDD, 1,2,3,7,8,9-HxCDD, etc.
- HpCDD Form example, 1,2,3,4,6,7,8-HpCDD, etc.
- OCDD OCDD
- PCDF polychlorinated dibensofuran
- TeCDF for example, 2,3,7,8-TeCDF
- PeCDF for example, 1,2,3,7,8-PeCDF, 1,2,3,4,8.
- -PeCDF, 2,3,4,7,8-PeCDF HxCDF (eg 1,2,3,4,7,8-HxCDF, 1,2,3,4,7,9-HxCDF, 1,2 , 3,6,7,8-HxCDF, 1,2,3,7,8,9-HxCDF, 2,3,4,6,7,8-HxCDF), HpCDF (eg, 1,2,3,4) , 6,7,8-HpCDF, 1,2,3,4,7,8,9-HpCDF) and / or OCDF.
- TeCDF for example, 2,3,7,8-TeCDF
- PeCDF for example, 1,2,3,7,8-PeCDF, 1,2,3,4,8).
- HxCDF eg 1,2,3,4,7,
- Non-ortho PCB for example, 3,4,4 ′, 5-TeCB, 3,3 ′, 4,4′-TeCB, 3,3 ′, 4) , 4 ', 5-PeCB, 3,3', 4,4 ', 5,5'-HxCB), Mono-ortho PCB (eg 2', 3,4,4 ', 5-PeCB, 2,3' , 4,4 ′, 5-PeCB, 2,3,3 ′, 4,4′-PeCB, 2,3,4,4 ′, 5-PeCB, 2,3 ′, 4,4 ′, 5,5 '-HxCB, 2,3,3', 4,4 ', 5-HxCB, 2,3,3', 4,4 ', 5'-HxCB, 2,3,3', 4,4 ', 5 , 5′-HpCB).
- DL-PCB dioxin-like polychlorinated biphenyl
- the manganese oxide for example, manganese dioxide (MnO 2)
- the specific surface area of preferably 20m 2 / g ⁇ 300m 2 / g, more preferably 100m 2 / g ⁇ 300m 2 / g, more preferably 130m 2 / g ⁇ 270 m 2 / g (for example, it may be about 150 m 2 / g, about 200 m 2 / g, about 250 m 2 / g, etc.).
- the “specific surface area” here refers to the BET specific surface area. That is, the “specific surface area” in the present invention is a specific surface area obtained by measurement according to JIS Z 8830-1990 (method for measuring the specific surface area of powder by gas adsorption). A specific measuring device is Macsorb model-1201 manufactured by Mountec.
- the supported manganese oxide for example, manganese dioxide (MnO 2 )
- the “average particle diameter” refers to a particle diameter measured by a laser diffraction / scattering method (microtrack method). That is, the “average particle diameter” in the present invention is a particle diameter obtained by measurement using a laser diffraction / scattering particle size analyzer.
- a specific laser diffraction / scattering particle size analyzer is SALD-2000A manufactured by Shimadzu Corporation.
- the amount of manganese oxide supported on the bag filter cloth that is, the amount of manganese oxide supported is preferably at least 10 g / m 2 , more preferably at least 20 g / m 2 , and still more preferably. At least 30 g / m 2 (eg at least 40 g / m 2 ).
- the “supported amount of manganese oxide” herein means the supported amount of manganese oxide per unit area of the filter cloth. That is, the amount of manganese oxide per area (m 2 ) of the filtration surface of the bag filter cloth is preferably at least 10 g, more preferably at least 20 g, and even more preferably at least 30 g (for example, at least 40 g).
- the upper limit of the amount of manganese oxide supported is not particularly limited, but is preferably about 160 g / m 2 , more preferably 90 g / m 2 , and still more preferably about 50 g / m 2 . Even with such a relatively small amount of manganese oxide, the concentration of dioxin substances in the exhaust gas can be effectively reduced (that is, dioxins in the exhaust gas, as will be described in detail below). The toxicity equivalent of the substance (ng-TEQ / Nm 3 ) can be reduced by at least about 45% to about 75%).
- the dioxin concentration is effectively reduced by the fact that the filter base of the bag filter filter cloth. This is thought to be due to the synergistic effect of the “material itself” and the “manganese oxide”.
- the crystal structure is not particularly limited.
- It may be manganese dioxide having a structure.
- the manganese dioxide supported on the bag filter cloth of the present invention comprises at least an ⁇ -type (epsilon-type) portion as its crystal structure.
- the cloth base material itself of the filter cloth may be made of at least one of a woven cloth and a non-woven cloth (for example, spunbond or felt).
- the woven fabric or non-woven fabric of the filter fabric includes fluorine-based fibers, PPS fibers (polyphenylene sulfide fibers), aramid fibers, polyamide fibers, polyimide fibers, polyester fibers and acrylic fibers, natural fibers such as cotton and wool, glass fibers And inorganic fibers such as ceramic fibers, and at least one fiber selected from the group consisting of metal fibers such as stainless steel fibers.
- the woven or non-woven fabric of the filter cloth is made of a fluorine-based fiber.
- Such fluorine-based fibers are preferably, for example, polytetrafluoroethylene fibers (PTFE fibers).
- PTFE fibers polytetrafluoroethylene fibers
- the cloth base material of the filter cloth may further contain glass fiber. That is, the cloth base material is preferably composed of fluorine-based fibers (for example, PTFE) and glass fibers. In such a case, it is preferable that the fluorine-based fiber (for example, PTFE) and the glass fiber have a suitable fiber diameter.
- the fineness of the glass fiber is preferably 3 to 15 ⁇ m, more preferably 5 to 15 ⁇ m (for example, about 5 to 8 ⁇ m or about 9 to 15 ⁇ m). This is because such glass fibers (glass fibers having the fineness as described above) can contribute to a reduction in the concentration of dioxins.
- the fiber diameter of the fluorinated fiber is, for example, about 6 to 12 ⁇ m.
- the glass fineness of the cloth base material of the filter cloth it may be particularly thin (for example, the fineness of about 5 to 8 ⁇ m described above), and such thin glass fibers constitute the cloth base material together with the fluorine-based fibers. It may be.
- the structure itself of the cloth base material of the filter cloth may be a single layer structure or a multiple layer structure.
- the fluorine-based fiber and / or the glass fiber are configured to form one layer.
- the “fluorine fiber layer A” and the “glass fiber-containing layer B” may be formed in layers. In such a case, it is preferable that manganese oxide is supported on the “layer B containing glass fibers”.
- the “fluorine fiber layer A” may be a layer containing a Teflon (registered trademark) component in addition to the PTFE component, and the “layer B containing glass fiber” may be added to the glass fiber component.
- the layer B may have a manganese oxide catalyst supported thereon.
- the cloth base material of the filter cloth is “layer B containing glass fibers (particularly preferably, layer B carrying a manganese oxide catalyst)” is “fluorine-based fiber layer A”. It may have a three-layer structure sandwiched from both sides.
- the filter cloth for bag filter according to the present invention (that is, the filter cloth in a state after being supported with manganese oxide) has an air permeability of preferably 3 to 20 cm 3 / cm 2 / sec, more preferably 3 to It is about 15 cm 3 / cm 2 / sec, more preferably about 4 to 10 cm 3 / cm 2 / sec.
- the air permeability of the filter cloth before supporting the manganese oxide is preferably 5 to 50 cm 3 / cm 2 / sec, more preferably 7 to 30 cm 3 / cm 2 / sec, and still more preferably 10 to 30 cm. It may be about 3 / cm 2 / sec.
- air permeability (before or after supporting manganese oxide) refers to JIS-L-1096. 27.1 Percentage value measured by the A method (Fragile method).
- the bag filter filter cloth (filter cloth carrying manganese oxide) according to the present invention has a thickness of, for example, about 1.0 mm to 20 mm, preferably 1.5 mm to 5.0 mm, and more preferably 1 mm. It may be about 5 mm to 3.0 mm. In the present invention, even with such a thin filter cloth (that is, even if the catalyst contact time is considered to be extremely short compared to the conventional honeycomb catalyst layer / catalyst reaction tower, etc.), As described above, the concentration of dioxins in the exhaust gas can be effectively reduced.
- the filter cloth for bag filter according to the present invention (that is, the filter cloth in a state after supporting manganese oxide) comprises an inorganic compound (an inorganic compound used for supporting the catalyst), more preferably a silicon compound.
- an inorganic compound an inorganic compound used for supporting the catalyst
- the filter cloth for bag filters according to the present invention may comprise a silicon compound in addition to the fibers of the cloth base material.
- the silicon compound is preferably amorphous silica, for example.
- Such a silicon compound may be contained in the “layer B containing glass fibers” together with the manganese oxide catalyst.
- the silicon compound preferably has a content of 10 to 80 g / m 2 , more preferably a content of 20 to 70 g / m 2 (based on the entire layer B) in the “layer B including glass fibers”. It's okay.
- Such a silicon compound can contribute to the effect of reducing the concentration of dioxins by combining with “the cloth base material itself of the filter cloth for bag filter” and / or “manganese oxide”.
- the manner of supporting manganese oxide in the filter cloth for bag filter is not particularly limited as long as manganese oxide is provided on the cloth base material.
- manganese oxide can be supported on the cloth base material of a bag filter cloth by the following method.
- the carrying form is a form in which manganese oxide is provided on the filter cloth by immersing the bag cloth filter cloth in the manganese oxide dispersion. More specifically, as shown in FIG. 3 (a), a filter cloth for a bag filter is applied to “a stock solution in which manganese oxide is dispersed in a dispersion medium containing at least water or a volatile organic solvent”. Soak and then subject to drying.
- This supporting form is a filter cloth in which manganese oxide-containing slurry coated on a base cloth (woven cloth) is sandwiched between webs (for example, cotton-like cloth). It is a form provided in More specifically, as shown in FIG. 3C, a “slurry stock solution in which manganese oxide is dispersed in a dispersion medium containing at least water or a volatile organic solvent” is used as a base fabric (woven fabric). After being coated on the cloth), it is sandwiched from both sides with a web (for example, cotton-like cloth), and then subjected to drying (needling treatment is performed if necessary). Thereby, since manganese oxide remains in the filter cloth, manganese oxide is suitably supported.
- a silicon compound for example, amorphous silica
- a silicon compound for example, amorphous silica
- a fabric member eg, base fabric and / or fiber layer
- a manganese oxide dispersion as another fiber layer or web (eg, cotton-like fabric).
- the bag member for bag filter is attached to a “stock solution in which manganese oxide is dispersed in a dispersion medium containing at least water or a volatile organic solvent”.
- the impregnated cloth member obtained by soaking is sandwiched from both sides by another fiber layer or web (for example, cotton-like cloth), and then subjected to drying (needling treatment is performed if necessary).
- another fiber layer or web for example, cotton-like cloth
- seedling treatment is performed if necessary.
- manganese oxide remains in the filter cloth for bag filters, manganese oxide is suitably supported.
- a silicon compound for example, amorphous silica
- a silicon compound for example, amorphous silica
- the filter cloth for bag filter of the present invention can effectively reduce the concentration of dioxins in exhaust gas passing therethrough. More specifically, in the filter cloth for bag filter of the present invention, the toxic equivalent (ng-TEQ / Nm 3 ) of dioxins is preferably reduced by 40% to 90% (for example, 45% to 75%) under the following conditions. % Reduction or 50% to 70% reduction).
- Exhaust gas temperature 100 to 200 ° C.
- Dioxin concentration in the exhaust gas before filtration 1 to 5 ng-TEQ / Nm 3
- Filtration area 120 to 160 cm 2 (for example, the thickness of the filter cloth in the filtration area is 2.0 mm to 3.0 mm)
- the exhaust gas provided to the bag filter cloth of the present invention contains at least a dioxin substance.
- the temperature of the exhaust gas supplied to the bag filter cloth is preferably about 80 ° C. to 250 ° C., more preferably about 100 ° C. to 200 ° C., and still more preferably 120 ° C. to It is about 180 ° C.
- the bag filter device of the present invention is characterized by comprising the above-described bag filter cloth. That is, the bag filter device of the present invention comprises a filter cloth for bag filter carrying manganese oxide as a catalyst for reducing dioxins.
- the bag filter device of the present invention comprises a bag filter filter cloth on which manganese dioxide (MnO 2 ) is supported as a catalyst for reducing dioxins. Since the filter cloth for bag filter used in the apparatus of the present invention is touched in the above-mentioned [filter cloth for bag filter of the present invention], description thereof is omitted to avoid duplication.
- manganese oxide may be evenly supported on the bag filter cloth, but when there is a portion through which exhaust gas passes well and a portion through which exhaust gas does not pass, there is a portion through which exhaust gas passes well. More manganese oxide may be supported.
- the configuration and form of the bag filter device of the present invention is not particularly limited as long as it is the same as a conventional bug filter.
- the bag filter device of the present invention includes the above-described bag filter filter cloth 10 (particularly a bag filter filter cloth sewn in a cylindrical shape) and a retainer used therefor.
- the tool 20 and the housing 30 for housing them (the upper part of the housing is provided with a device for hanging the bag filter, etc., while the lower part of the housing is provided with a hopper 38 with a rotary valve 36 attached thereto. ) At least.
- the filter cloth for bag filters of the present invention only needs to support manganese oxide as a “catalyst for reducing dioxins”, it does not contain harmful substances other than dioxins such as HCl, SOx and / or NOx. As long as it is a catalyst for reduction, such a catalyst may be carried on a bag filter cloth as necessary.
- Test method A bag filter made of the filter cloth for bag filter shown in Table 1 below and FIG. 5 was attached to the test apparatus shown in FIG. The bag filter was ventilated under the conditions shown in Table 2, and dioxin concentrations were measured on the upstream side and downstream side of the bag filter (see also FIG. 7). Specifically, the test procedure is as follows.
- Adjustment of test conditions 1) Compressor air and cylinder gas were mixed to prepare a simulated gas having a predetermined oxygen / nitrogen oxide concentration. 2) Water was supplied to the simulated gas by heating and vaporizing the water. 3) About 4000 ng-TEQ / L of dioxins-methanol solution extracted and adjusted from the fly ash of the incineration facility was sprayed into an electric tube furnace under a nitrogen stream, heated and vaporized, and mixed with the simulated gas. 4) The suction amount of the air pump was adjusted so that the flow rate of the simulated gas passing through the bag filter was a predetermined linear velocity (LV). Excess gas was used to confirm the inlet concentration.
- LV linear velocity
- the test temperature was adjusted so that the temperature in the vicinity of the bag filter outlet was a predetermined temperature. 2. Sampling of dioxins 1) Considering the influence of dioxins concentration due to adsorption of dioxins into the test equipment, simulated gas was circulated for 10 hours or more in advance. 2) Prior to collecting dioxins, simulated gas was circulated for 4 hours at a predetermined temperature and linear velocity (LV) to stabilize the bag filter as much as possible. 3) Subsequently, dioxins were collected for 4 hours on the upstream and downstream sides of the bag filter in accordance with JIS K0311 and subjected to analysis. 4) During the measurement of dioxins, the oxygen concentration was continuously measured downstream of the bag filter, and the test conditions were monitored. [Table 1] [Table 2]
- Test results The test results are shown in Table 4 below. [Table 4]
- the filter cloth for bag filter loaded with manganese oxide has the effect of reducing dioxins. Specifically, it was confirmed that the concentration of dioxins (international equivalent equivalent concentration) could be reduced by 45% to 75% under the above test conditions.
- Example 2 dioxins of a bag filter carrying manganese oxide (corresponding to the specimen C of Example 1 above) and a bag filter carrying vanadium pentoxide (hereinafter referred to as specimen E). In order to confirm the difference in the reduction effect, the following tests were conducted.
- Test method A bag filter made of a filter cloth for bag filter shown in Table 5 below was attached to the test apparatus shown in FIG. The bag cloth was ventilated under the conditions shown in Table 6, and the dioxins concentration was measured on the upstream side and downstream side of the bag filter. Specifically, the test procedure is as follows.
- Adjustment of test conditions 1) Compressor air and cylinder gas were mixed to prepare a simulated gas having a predetermined oxygen / nitrogen oxide concentration. 2) Water was supplied to the simulated gas by heating and vaporizing the water. 3) About 2500 ng-TEQ / L of dioxins-methanol solution extracted and adjusted from the fly ash of the incineration facility was sprayed into an electric tube furnace under a nitrogen stream, heated and vaporized, and mixed with the simulated gas. 4) The suction amount of the air pump was adjusted so that the flow rate of the simulated gas passing through the bag filter was a predetermined linear velocity (LV). Excess gas was used to confirm the inlet concentration.
- LV linear velocity
- the test temperature was adjusted so that the temperature in the vicinity of the bag filter outlet was a predetermined temperature. 6) The oxygen concentration was continuously measured after the bag filter, and the dioxins concentration (toxicity conversion value) was converted to an oxygen concentration of 12% and evaluated using the average value.
- the removal rate of the dioxins of the specimen E was 65%, whereas the removal rate of the dioxins of the specimen C was 68%. That is, it was found that the dioxin removal rate of the specimen C exceeded the dioxin removal rate of the specimen E.
- the filter cloth of the present invention is used for a bag filter for treating various exhaust gases.
- the filter cloth of the present invention can be used for a bag filter for treating exhaust gas (especially gas that may contain dioxins) generated from incineration facilities, steelworks / steelworks, metal refining plants, and the like.
- this invention includes the following aspects: First aspect : A filter cloth used for bag filters, A filter cloth for a bag filter, characterized in that manganese oxide is supported on the filter cloth as a catalyst for reducing dioxin substances in exhaust gas.
- Second aspect The filter cloth for bag filters according to the first aspect, wherein the manganese oxide is manganese dioxide.
- Third aspect The filter cloth for bag filter according to the first aspect, wherein the thickness of the filter cloth is 1.5 mm to 5.0 mm.
- Fourth aspect The filter cloth for a bag filter according to any one of the first to third aspects, wherein the specific surface area of manganese dioxide is 20 m 2 / g to 300 m 2 / g.
- Fifth aspect The filter cloth for a bag filter according to any one of the first to fourth aspects, wherein an average particle diameter of manganese dioxide is 0.5 ⁇ m to 1.5 ⁇ m.
- Sixth aspect The bag filter filter cloth according to any one of the first to fifth aspects, wherein the supported amount of manganese oxide per unit area of the filter cloth is at least 20 g / m 2 .
- Seventh aspect The bag filter filter cloth according to any one of the first to sixth aspects, wherein the filter cloth includes a fluorine-based fiber.
- Said 7th aspect WHEREIN: The filter cloth for bag filters characterized by a fluorine-type fiber being a PTFE fiber.
- Ninth aspect The filter cloth for bag filter according to the seventh or eighth aspect, wherein the filter cloth further comprises glass fibers.
- Tenth aspect The filter cloth for bag filter according to the ninth aspect, wherein the glass fiber is 3 to 15 ⁇ m.
- Eleventh aspect The filter cloth for a bag filter according to any one of the first to tenth aspects, wherein the filter cloth comprises a silicon compound.
- the filter cloth for bag filter is characterized in that the air permeability of the filter cloth carrying manganese oxide is 3 to 15 cm 3 / cm 2 / sec. 13th aspect : The filter cloth for bag filter according to any one of the first to twelfth aspects, wherein the reduction rate of toxicity equivalent (ng-TEQ / Nm 3 ) of the dioxins substance under the following conditions is 45% to 75%.
- a bag filter device comprising the bag filter cloth according to any one of the first to thirteenth aspects.
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- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
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Abstract
In order to provide a dioxin removal technique that satisfies both a desired dioxin removal efficiency and a simple process step/equipment, the present invention provides a filter cloth for bag filters which is characterized by having, supported thereon, a catalyst for reducing the amount of dioxins contained in a discharge gas, the catalyst comprising manganese dioxide.
Description
本発明は、バグフィルターに用いられる濾過布およびそれを用いたバグフィルター装置に関する。より詳細には、ダイオキシン類物質を含んだ排ガスを処理するための濾過布およびそれを用いたバグフィルター装置に関する。
The present invention relates to a filter cloth used for a bag filter and a bag filter device using the same. More specifically, the present invention relates to a filter cloth for treating exhaust gas containing dioxins and a bag filter device using the same.
産業廃棄物や都市廃棄物を処理するごみ焼却施設から発生する排気ガスを始め、製鉄所・製鋼所または金属精錬工場から発生する排気ガスには様々な有害物質が含まれている。代表的な有害物質は、煤塵、塩化水素、硫黄酸化物（ＳＯｘ）、窒素酸化物（ＮＯｘ）の他、ダイオキシン類、ＰＣＢなどの毒性有機塩素化合物である。
Exhaust gas generated from waste incineration facilities that treat industrial waste and municipal waste, as well as exhaust gas generated from steelworks, steelworks, or metal refining plants contain various harmful substances. Typical harmful substances are dust, hydrogen chloride, sulfur oxide (SOx), nitrogen oxide (NOx), and toxic organochlorine compounds such as dioxins and PCBs.
このような有害物質は、環境保護の観点や人体に悪影響を及ぼす虞があるので除去ないしは低減することが求められている。特に、ダイオキシンン類は、人体に対して発癌毒性・生殖毒性・免疫毒性を呈すると共に、安定な物質ゆえ水に溶けず、半永久的に毒性を示すので、除去・低減が特に強く求められている。例えば、厚生省のガイドライン（１９９０年１２月）によれば、排ガス処理後のダイオキシン類の国際毒性等価換算濃度を所定値以下にすることが求められている。
Such harmful substances are required to be removed or reduced because they may adversely affect the environment and human health. In particular, dioxins exhibit carcinogenic toxicity, reproductive toxicity, and immunotoxicity to the human body, and since they are stable substances, they do not dissolve in water and are semipermanently toxic. . For example, according to the guidelines of the Ministry of Health and Welfare (December 1990), the international equivalent equivalent concentration of dioxins after exhaust gas treatment is required to be a predetermined value or less.
排気ガス中のダイオキシン類は、バグフィルターの上流側ないしは下流側で行われる“吸着除去”や“分解除去”によって一般的に処理される。“吸着除去”は、活性炭などの吸着材を用いており、バグフィルターの処理前または処理後において排気ガスを吸着材に接触させ、それによって、ダイオキシン類を吸着材へと吸着させる処理を行っている。一方、“分解除去”は触媒を用いており、バグフィルターの処理前または処理後において排気ガスを触媒に接触させ、それによって、ダイオキシン類の分解反応を促進させる処理を行っている（例えば図８参照）。
Dioxins in exhaust gas are generally treated by “adsorption removal” or “decomposition removal” performed upstream or downstream of the bag filter. “Adsorption removal” uses an adsorbent such as activated carbon, and makes the exhaust gas contact with the adsorbent before or after the bag filter treatment, thereby adsorbing the dioxins onto the adsorbent. Yes. On the other hand, the “decomposition removal” uses a catalyst, and the exhaust gas is brought into contact with the catalyst before or after the bag filter treatment, thereby promoting the decomposition reaction of dioxins (for example, FIG. 8). reference).
特に分解除去に用いられる触媒は、必要とされる滞留時間の点（排気ガスが触媒と接している時間）などを考慮してハニカム層として用いており、かかるハニカム触媒層に排気ガスを通すことによってＮＯｘなど共にダイオキシン類を分解させている。用いられる触媒は、五酸化バナジウム、酸化タングステン、チタンなどから成る脱硝触媒や、それに白金元素を加えた触媒などが一般的である。
In particular, the catalyst used for decomposition and removal is used as a honeycomb layer in consideration of the required residence time (the time during which the exhaust gas is in contact with the catalyst), and the exhaust gas is passed through the honeycomb catalyst layer. Dioxins are decomposed together with NOx. The catalyst used is generally a denitration catalyst composed of vanadium pentoxide, tungsten oxide, titanium, or the like, or a catalyst in which platinum element is added thereto.
上記触媒は、ダイオキシンの分解除去効率の点で好ましいものの、比較的高価であり、かつ、必要な“滞留時間（触媒接触時間）”を確保する点からハニカム状などに成型して使用する必要がある。十分な“滞留時間（触媒接触時間）”が確保できないと、所望の分解除去率を結局は達成できない虞があるからである。また、上記のような分解除去法では、そもそも“バグフィルターによる集塵処理”と“有害物質の分解処理”とをそれぞれ別個の工程で行っており、プロセス工程・設備の点で簡易とはいえない。
Although the above catalyst is preferable in terms of dioxin decomposition and removal efficiency, it is relatively expensive and needs to be used after being molded into a honeycomb or the like from the viewpoint of securing a necessary “residence time (catalyst contact time)”. is there. This is because if sufficient “residence time (catalyst contact time)” cannot be ensured, the desired decomposition and removal rate may not be achieved. In the above-described decomposition and removal method, “dust collection using a bag filter” and “decomposition treatment of harmful substances” are performed in separate steps in the first place. Absent.
本発明はかかる事情に鑑みて為されたものである。即ち、本発明の主たる目的は、所望のダイオキシン除去効率および簡易なプロセス工程・設備の双方を満たすダイオキシン除去技術を提供することである。
The present invention has been made in view of such circumstances. That is, the main object of the present invention is to provide a dioxin removal technique that satisfies both desired dioxin removal efficiency and simple process steps and equipment.
本願発明者らは、従来技術の延長線上で対応するのではなく、新たな方向にて対処することによって上記目的の達成を試みた。その結果、上記目的が達成されたバグフィルター用濾過布およびそれを用いたバグフィルター装置の発明に至った。具体的には、排気ガス中のダイオキシン類物質を減じるための触媒として、マンガン酸化物が濾過布に担持されて成るバグフィルター用濾過布を提供する。好ましくは、排気ガス中のダイオキシン類物質を減じるため、二酸化マンガンから成る触媒を担持させたバグフィルター用濾過布を提供する。
The inventors of the present application tried to achieve the above object by addressing in a new direction rather than responding on the extension of the prior art. As a result, the filter cloth for bag filter and the bag filter apparatus using the same have been achieved. Specifically, the present invention provides a filter cloth for a bag filter in which manganese oxide is supported on a filter cloth as a catalyst for reducing dioxin substances in exhaust gas. Preferably, a bag cloth for bag filter carrying a catalyst made of manganese dioxide is provided to reduce dioxin substances in exhaust gas.
本発明に係るバグフィルター用濾過布の特徴は、ダイオキシン類物質を減じるための触媒として用いられる二酸化マンガン等のマンガン酸化物を、あくまでもバグフィルターの濾過布に対して直接的に設け、かつ、単独で用いていることを特徴とする。
The feature of the filter cloth for bag filter according to the present invention is that manganese oxide such as manganese dioxide used as a catalyst for reducing dioxin substances is provided directly on the filter cloth of the bag filter, and is used alone. It is used in.
本明細書において「ダイオキシン類物質」とは、ポリ塩化ジベンゾパラジオキシン (ＰＣＤＤ)、ポリ塩化ジベンゾフラン（ＰＣＤＦ）およびダイオキシン様ポリ塩化ビフェニル(ＤＬ－ＰＣＢ)のことを実質的に指している。
As used herein, “dioxin substances” substantially refers to polychlorinated dibenzopararadioxin (PCDD), polychlorinated dibenzofuran (PCDF), and dioxin-like polychlorinated biphenyl (DL-PCB).
ある好適な態様において、バグフィルター用濾過布に担持されているマンガン酸化物は、その比表面積が２０ｍ２／ｇ～３００ｍ２／ｇであることが好ましい。また、バグフィルター用濾過布に担持されているマンガン酸化物は、その平均粒径が０．５μｍ～１．５μｍであることも好ましい。例えば、バグフィルター用濾過布に担持されているマンガン酸化物は二酸化マンガンであってよい。バグフィルター用濾過布に担持されている二酸化マンガンは、その結晶構造としてε型（イプシロン型）を含んでなるものであってよい。
In a preferred embodiment, the manganese oxide supported on the filter cloth for bag filter preferably has a specific surface area of 20 m 2 / g to 300 m 2 / g. Further, it is also preferable that the manganese oxide supported on the bag filter cloth has an average particle size of 0.5 μm to 1.5 μm. For example, the manganese oxide supported on the filter cloth for bag filter may be manganese dioxide. Manganese dioxide supported on the filter cloth for bag filter may comprise ε type (epsilon type) as its crystal structure.
別のある好適な態様において、マンガン酸化物の担持量は少なくとも２０ｇ／ｍ２である。つまり、バグフィルター用濾過布に直接的に設けられているマンガン酸化物の量は少なくとも２０ｇ／ｍ２であることが好ましい。
In another preferred embodiment, the amount of manganese oxide supported is at least 20 g / m 2 . That is, it is preferable that the amount of manganese oxide provided directly on the bag filter cloth is at least 20 g / m 2 .
更に別のある好適な態様において、バグフィルター用濾過布はフッ素系繊維を有して成っている。つまり、バグフィルター用濾過布を構成する布自体がフッ素系繊維を有して成ることが好ましい。かかる場合、フッ素系繊維は例えばＰＴＦＥ繊維（ポリテトラフルオロエチレン繊維）であることが好ましい。尚、ガラス繊維が更に含まれていてもよい。つまり、ある好適な態様のバグフィルター用濾過布はフッ素系繊維とガラス繊維との双方を少なくとも有して成る（例えば、ガラス繊維の繊度は３～１５μｍである）。
In yet another preferred embodiment, the filter cloth for bag filter has fluorine-based fibers. That is, it is preferable that the cloth itself constituting the bag filter cloth has fluorine-based fibers. In such a case, the fluorine-based fiber is preferably, for example, PTFE fiber (polytetrafluoroethylene fiber). In addition, the glass fiber may be further contained. In other words, the filter cloth for a bag filter according to a preferred embodiment has at least both a fluorine-based fiber and a glass fiber (for example, the fineness of the glass fiber is 3 to 15 μm).
更に別のある好適な態様において、バグフィルター用濾過布は珪素化合物を有して成る。つまり、本発明のバグフィルター用濾過布が上記の繊維成分およびマンガン酸化物触媒成分に加えて、珪素化合物成分を有して成るものであってもよい。
In still another preferred embodiment, the bag filter cloth includes a silicon compound. That is, the filter cloth for bag filters of the present invention may have a silicon compound component in addition to the fiber component and the manganese oxide catalyst component.
更に別のある好適な態様において、本発明に係るバグフィルター用濾過布は、その通気度が３～１５ｃｍ３／ｃｍ２／ｓｅｃとなっている。つまり、マンガン酸化物を担持されたバグフィルター用濾過布の通気度は好ましくは３～１５ｃｍ３／ｃｍ２／ｓｅｃである。
In still another preferred embodiment, the filter cloth for a bag filter according to the present invention has an air permeability of 3 to 15 cm 3 / cm 2 / sec. In other words, the air permeability of the bag filter filter cloth carrying manganese oxide is preferably 3 to 15 cm 3 / cm 2 / sec.
更に別のある好適な態様において、バグフィルター用濾過布は厚さが比較的薄く、例えば濾過布が１．５ｍｍ～５．０ｍｍの厚さを有している。つまり、マンガン酸化物が担持されたバグフィルター用濾過布は、好ましくは１．５ｍｍ～５．０ｍｍの厚さを有している。
In still another preferred embodiment, the bag filter cloth is relatively thin, for example, the filter cloth has a thickness of 1.5 mm to 5.0 mm. That is, the filter cloth for bag filter carrying manganese oxide preferably has a thickness of 1.5 mm to 5.0 mm.
本発明のバグフィルター用濾過布は、好ましくは、下記条件におけるダイオキシン類物質の毒性等価（ｎｇ－ＴＥＱ／Ｎｍ３）の低減率が４５％～７５％となっている：
・排気ガス線速度：０．８～１．２ｍ／ｓｅｃ
・排気ガス温度：１００～２００℃
・濾過前の排気ガス中のダイオキシン濃度：１～５ｎｇ－ＴＥＱ／Ｎｍ３
・濾過面積：１２０～１６０ｃｍ２ The filter cloth for bag filter of the present invention preferably has a reduction rate of toxic equivalent (ng-TEQ / Nm 3 ) of dioxin substances of 45% to 75% under the following conditions:
・ Exhaust gas linear velocity: 0.8-1.2m / sec
・ Exhaust gas temperature: 100-200 ℃
・ Dioxin concentration in the exhaust gas before filtration: 1 to 5 ng-TEQ / Nm 3
-Filtration area: 120-160 cm 2
・排気ガス線速度：０．８～１．２ｍ／ｓｅｃ
・排気ガス温度：１００～２００℃
・濾過前の排気ガス中のダイオキシン濃度：１～５ｎｇ－ＴＥＱ／Ｎｍ３
・濾過面積：１２０～１６０ｃｍ２ The filter cloth for bag filter of the present invention preferably has a reduction rate of toxic equivalent (ng-TEQ / Nm 3 ) of dioxin substances of 45% to 75% under the following conditions:
・ Exhaust gas linear velocity: 0.8-1.2m / sec
・ Exhaust gas temperature: 100-200 ℃
・ Dioxin concentration in the exhaust gas before filtration: 1 to 5 ng-TEQ / Nm 3
-Filtration area: 120-160 cm 2
本発明では、上記のバグフィルター用濾過布を有して成るバグフィルター装置も提供される。つまり、本発明は、上記バグフィルター用濾過布の他に、濾過布の吊下げ具やハウジングから少なくとも構成されるバグフィルター装置を提供する。
The present invention also provides a bag filter device having the bag filter cloth described above. That is, this invention provides the bag filter apparatus comprised at least from the hanging tool and housing of a filter cloth other than the said filter cloth for bag filters.
本発明のバグフィルター用濾過布は、そこを通過する排気ガス中の粉塵物質を低減できるのみならず、通過する排気ガス中のダイオキシン類物質をも低減できる。つまり、本発明に従えば、排気ガスの集塵処理に際してダイオキシン類物質を低減することができる。
The filter cloth for bag filter of the present invention can reduce not only dust substances in the exhaust gas passing therethrough but also dioxin substances in the exhaust gas passing therethrough. That is, according to the present invention, dioxin substances can be reduced during the exhaust gas dust collection treatment.
特に、従前の排気ガス処理ではダイオキシン分解処理はバグフィルターの集塵処理とは別個の工程で行っていたところ、それらを１つの工程・装置で行うことができ、排気ガス処理のプロセス工程・設備が全体として簡易になる。また、用いられる触媒は、五酸化バナジウム、酸化タングステン、チタンおよび／または白金などの比較的高価なものでなく、あくまでも二酸化マンガンであるので、材料コストの点でも有利である。
In particular, in the conventional exhaust gas treatment, the dioxin decomposition treatment was carried out in a separate process from the bag filter dust collection treatment, and these can be carried out in one process / equipment, and the exhaust gas treatment process / equipment Becomes simple as a whole. Further, the catalyst used is not relatively expensive such as vanadium pentoxide, tungsten oxide, titanium and / or platinum, but is manganese dioxide, which is advantageous in terms of material cost.
後述でも触れているが、バグフィルター用の濾過布は薄くかつ網の目構造を有しているので「処理される排気ガス」は短時間で濾過布を通過することになるものの、そのような条件であっても、通過する排気ガス中のダイオキシン類物質の濃度を低減することができる。つまり、本発明のバグフィルター用濾過布は、従前のハニカム触媒層（触媒反応塔）などと比較すると、触媒接触時間が短いと考えられる条件であるものの（例えば、バグフィルター用濾過布の排気ガス通過時間は、ハニカム触媒層の排気ガス通過時間よりも１／５～１／２０程度と極端に短い）、排気ガス中のダイオキシン類物質の濃度を効果的に低減できる。
As mentioned later, the filter cloth for bag filters is thin and has a mesh structure, so “exhaust gas to be treated” will pass through the filter cloth in a short time. Even under the conditions, the concentration of the dioxin substance in the exhaust gas passing therethrough can be reduced. That is, the filter cloth for bag filter of the present invention has a condition that the catalyst contact time is considered to be shorter than that of a conventional honeycomb catalyst layer (catalytic reaction tower) or the like (for example, exhaust gas of the filter cloth for bag filter) The passage time is extremely short, about 1/5 to 1/20 of the exhaust gas passage time of the honeycomb catalyst layer), and the concentration of the dioxin substance in the exhaust gas can be effectively reduced.
以下にて、本発明のバグフィルター用濾過布およびそれを用いたバグフィルター装置を詳細に説明する。尚、図面に示す形態や各種の要素は、本発明の理解のために模式的に示したにすぎず、寸法比や外観などは実物と異なり得ることに留意されたい。
Hereinafter, the filter cloth for bag filter of the present invention and the bag filter apparatus using the same will be described in detail. It should be noted that the forms and various elements shown in the drawings are merely schematically shown for the purpose of understanding the present invention, and the dimensional ratio, appearance, and the like may be different from the actual ones.
［本発明のバグフィルター用濾過布］
本発明の濾過布は、排気ガス処理に用いられるバグフィルターの濾布である。それゆえ、本発明の濾過布は、一般的には袋状または筒状にして用いられる。例えば、図１に示すような円筒形状に縫製して用いられる。このような濾過布に対して“粉塵物質を含んだ排気ガス”を通過させると、布の空隙に起因したフィルター作用によって粉塵物質が濾過布に捕捉され、その結果、排気ガス中から粉塵物質が除去される。 [Filter cloth for bag filter of the present invention]
The filter cloth of the present invention is a bag filter cloth used for exhaust gas treatment. Therefore, the filter cloth of the present invention is generally used in a bag shape or a cylindrical shape. For example, it is used by sewing into a cylindrical shape as shown in FIG. When “exhaust gas containing dust substance” is passed through such a filter cloth, the dust substance is captured by the filter cloth due to the filter action caused by the gap of the cloth, and as a result, the dust substance is extracted from the exhaust gas. Removed.
本発明の濾過布は、排気ガス処理に用いられるバグフィルターの濾布である。それゆえ、本発明の濾過布は、一般的には袋状または筒状にして用いられる。例えば、図１に示すような円筒形状に縫製して用いられる。このような濾過布に対して“粉塵物質を含んだ排気ガス”を通過させると、布の空隙に起因したフィルター作用によって粉塵物質が濾過布に捕捉され、その結果、排気ガス中から粉塵物質が除去される。 [Filter cloth for bag filter of the present invention]
The filter cloth of the present invention is a bag filter cloth used for exhaust gas treatment. Therefore, the filter cloth of the present invention is generally used in a bag shape or a cylindrical shape. For example, it is used by sewing into a cylindrical shape as shown in FIG. When “exhaust gas containing dust substance” is passed through such a filter cloth, the dust substance is captured by the filter cloth due to the filter action caused by the gap of the cloth, and as a result, the dust substance is extracted from the exhaust gas. Removed.
本発明の特徴は、このようなバグフィルター用濾過布に対して「排気ガス中のダイオキシン類物質を減じるための触媒」として“マンガン酸化物”が担持されていることである（図２参照）。つまり、本発明においては、バグフィルター用濾過布そのものが、ダイオキシン類を減じるための触媒を有して成る。換言すれば、本発明は、排気ガス中のダイオキシン類物質を減じるためのマンガン酸化物触媒をバグフィルター用濾過布以外の個所に設けることは意図しておらず（それゆえ、例えば、マンガン酸化物触媒を排気ガス中に吹き込んで使用することなどは意図されておらず）、あくまでもバグフィルター用濾過布に対して直接的にマンガン酸化物（特に後述するように“二酸化マンガン”）を用いることを意図している。
The feature of the present invention is that “manganese oxide” is supported as a “catalyst for reducing dioxin substances in exhaust gas” on such a filter cloth for bag filter (see FIG. 2). . That is, in the present invention, the filter cloth for bag filter itself has a catalyst for reducing dioxins. In other words, the present invention does not intend to provide a manganese oxide catalyst for reducing dioxin substances in exhaust gas at a place other than a bag filter filter cloth (hence, for example, manganese oxide). It is not intended to use the catalyst by blowing it into the exhaust gas), but to use manganese oxide (particularly “manganese dioxide” as described later) directly on the filter cloth for the bag filter. Intended.
ここで従来技術における当業者の認識について説明しておく。従来においては、マンガンなどの酸化物は酸化触媒能を有し、それゆえ、ダイオキシン類などのハロゲン化有機化合物を酸化分解させることは知られているものの、かかる酸化分解のためには、ある程度長い“触媒接触時間”が必要である、との当業者の認識であった。従って、マンガンなどの酸化物は、従来技術ではハニカム層触媒として用いたり、あるいは、排気ガス中に吹き込む処理（例えば特開２００５－２８７７５９号公報）などを行うことによって必要な“滞留時間（触媒接触時間）”を稼いでいた。この点につき、本願発明者らが鋭意検討した結果、マンガン酸化物をバグフィルター用濾過布に直接用いると、予想外にも排気ガス中のダイオキシン類の濃度を効果的に減じることができることを見出した。つまり、マンガン酸化物触媒、すなわち、酸化マンガン触媒は粉体物質であり濾過布に適用し難く、かつ、濾過布などの網の目を比較的短時間で通過する排気ガスに対して酸化マンガン触媒はダイオキシン類濃度を効果的に減じることができないと従来一般に考えられていたところ（ダイオキシン類濃度の効果的な低減のためには、特開２００１－１０４７２８号公報のように、ＴｉＯ２を担体として五酸化バナジムと三酸化タングステンを活性成分として用いることなどにより酸化力を高めた触媒を用いることが従来一般に行われている）、本願発明者らはバグフィルター用濾過布に対して直接的にマンガン酸化物を敢えて適用してみることで、排気ガス中のダイオキシン類濃度を効果的に減じることができることを見出し、本発明を完成させた（特定の理論に拘束されることを意図していないが、バグフィルター用濾過布に担持されたマンガン酸化物でもダイオキシン濃度が効果的に低減するのは、“バグフィルター用濾過布の布基材自体”と“マンガン酸化物”との互いの好適な組合せ相性に起因するものと考えられる）。
Here, the recognition of those skilled in the art in the prior art will be described. Conventionally, oxides such as manganese have an oxidation catalytic ability, and therefore it is known to oxidatively decompose halogenated organic compounds such as dioxins. One skilled in the art recognized that “catalyst contact time” was necessary. Therefore, oxides such as manganese are used as a honeycomb layer catalyst in the prior art, or a “residence time (catalyst contact) required by performing a treatment (for example, Japanese Patent Application Laid-Open No. 2005-287759) or the like that is blown into exhaust gas. Time) ”. As a result of intensive studies by the inventors of the present invention, it was found that the concentration of dioxins in the exhaust gas can be effectively reduced unexpectedly when manganese oxide is directly used in the bag filter cloth. It was. In other words, the manganese oxide catalyst, that is, the manganese oxide catalyst is a powder material and is difficult to apply to the filter cloth, and the manganese oxide catalyst against exhaust gas that passes through the mesh of the filter cloth in a relatively short time. Has been generally considered that the concentration of dioxins cannot be effectively reduced (for effective reduction of the concentration of dioxins, as disclosed in JP-A-2001-104728, TiO 2 is used as a carrier). In the past, it has been generally used to use a catalyst having enhanced oxidizing power by using vanadium pentoxide and tungsten trioxide as active components), and the present inventors directly applied manganese to the filter cloth for bag filters. Discovering that dioxins concentration in exhaust gas can be effectively reduced by darely applying oxides, and completed the present invention (It is not intended to be bound by a specific theory, but the manganese oxide supported on the filter cloth for bag filters effectively reduces the dioxin concentration as well. This is considered to be due to the favorable combination compatibility between the “substrate itself” and the “manganese oxide”.
このように案出されたものゆえ、本発明においては、排気ガス中の種々の有害物質のうちあくまでもダイオキシン類物質に特化して減じる触媒として、マンガン酸化物がバグフィルター用濾過布に直接組み込まれている。
Thus, in the present invention, in the present invention, manganese oxide is directly incorporated into the filter cloth for the bag filter as a catalyst that reduces and reduces only the dioxins among various harmful substances in the exhaust gas. ing.
好ましくは、本発明に係るバグフィルター用濾過布では、「排気ガス中のダイオキシン類を減じるための触媒」としてマンガン酸化物のみが用いられている。ここでいう『マンガン酸化物のみが用いられている（即ち、マンガン酸化物のみがバグフィルター用濾過布に担持されている）』とは、排気ガスに含まれるダイオキシン類物質を減じるための触媒として、マンガン酸化物以外の物質が濾過布に設けられていないことを意味している。つまり、ダイオキシン類を減じるため“マンガン酸化物以外の触媒”がバグフィルター用濾過布に担持または保持されていない。これにつき換言すれば、本発明においては、ダイオキシン類物質を減じるためにマンガン酸化物が他の金属または金属化合物等と併用してバグフィルター用濾過布に用いられておらず、また、バグフィルター用濾過布に用いられるマンガン酸化物が、他の元素を含んだ化合物（例えば複合酸化物）などとなっていない。
Preferably, in the filter cloth for bag filter according to the present invention, only manganese oxide is used as “a catalyst for reducing dioxins in exhaust gas”. Here, “only manganese oxide is used (that is, only manganese oxide is supported on the filter cloth for bag filter)” is a catalyst for reducing dioxins contained in exhaust gas. This means that no substance other than manganese oxide is provided on the filter cloth. That is, in order to reduce dioxins, “catalysts other than manganese oxide” are not supported or held on the filter cloth for bag filters. In other words, in the present invention, manganese oxide is not used in a bag filter cloth in combination with other metals or metal compounds in order to reduce dioxins, and for bag filters. Manganese oxide used for the filter cloth is not a compound (for example, complex oxide) containing other elements.
バグフィルター用濾過布に担持される酸化マンガンとしては、一酸化マンガン（ＭｎＯ）、四酸化三マンガン（Ｍｎ３Ｏ４）、二酸化マンガン（ＭｎＯ２）、三酸化マンガン（ＭｎＯ３）、三酸化二マンガン（Ｍｎ２Ｏ３）、四酸化三マンガン（Ｍｎ３Ｏ４）、四酸化五マンガン（Ｍｎ５Ｏ４）および七酸化二マンガン（Ｍｎ２Ｏ７）から成る群から選択される少なくとも１種を挙げることができる。本発明に係るバグフィルター用濾過布に担持される酸化マンガンとしては、二酸化マンガンが好ましい。
Examples of manganese oxide supported on the filter cloth for bag filters include manganese monoxide (MnO), trimanganese tetroxide (Mn 3 O 4 ), manganese dioxide (MnO 2 ), manganese trioxide (MnO 3 ), and dioxide trioxide. At least one selected from the group consisting of manganese (Mn 2 O 3 ), trimanganese tetroxide (Mn 3 O 4 ), pentamanganese tetroxide (Mn 5 O 4 ) and dimanganese heptaoxide (Mn 2 O 7 ) Can be mentioned. Manganese dioxide is preferred as the manganese oxide supported on the bag filter cloth according to the present invention.
すなわち、本発明に係るバグフィルター用濾過布では、「排気ガス中のダイオキシン類物質を減じるための触媒」として、“二酸化マンガン”のみが直接的に用いられていることが好ましい。つまり、本発明に係るバグフィルター用濾過布では、「排気ガス中のダイオキシン類物質を減じるための触媒」として、あくまでも“二酸化マンガンから成る触媒”がバグフィルター用濾過布に担持されていることが好ましい。
That is, in the filter cloth for a bag filter according to the present invention, it is preferable that only “manganese dioxide” is directly used as “a catalyst for reducing dioxin substances in exhaust gas”. In other words, in the filter cloth for bag filter according to the present invention, the “catalyst made of manganese dioxide” is supported on the filter cloth for bag filter only as “a catalyst for reducing dioxin substances in exhaust gas”. preferable.
より具体的には、本発明に係るバグフィルター用濾過布では、ダイオキシン類物質を分解除去するための触媒として、“二酸化マンガン”がバグフィルター用濾過布に直接的に用いられており、それ以外の触媒物質（ダイオキシン低減効果を狙った触媒物質）がバグフィルター用濾過布に用いられていない。
More specifically, in the filter cloth for bag filter according to the present invention, “manganese dioxide” is directly used in the filter cloth for bag filter as a catalyst for decomposing and removing dioxins, The catalyst material (catalyst material aiming at dioxin reduction effect) is not used for the filter cloth for bag filters.
後述の実施例２にも示すように、マンガン酸化物が二酸化マンガンである場合、二酸化マンガンから成る触媒を担持させたバグフィルターは、従来から継続的に用いられている五酸化バナジウム系触媒を担持させたバグフィルターよりも、ダイオキシン類を効果的に除去できる。すなわち、本発明のバグフィルター用濾過布は、劇物に指定されている触媒を用いることなく、二酸化マンガンから成る触媒を担持させたバグフィルターでダイオキシン類を効果的に除去できる。それ故、本発明のバグフィルター用濾過布は、毒性がないが故に安全にダイオキシン類を除去でき、かつ、材料コストを抑えることができる点で優れている。
As shown in Example 2 to be described later, when the manganese oxide is manganese dioxide, the bag filter carrying the catalyst made of manganese dioxide carries the vanadium pentoxide catalyst that has been continuously used. Dioxins can be removed more effectively than a bug filter. That is, the filter cloth for bag filter of the present invention can effectively remove dioxins with a bag filter carrying a catalyst made of manganese dioxide without using a catalyst designated as a deleterious substance. Therefore, the filter cloth for bag filter of the present invention is excellent in that dioxins can be safely removed and the material cost can be suppressed because it is not toxic.
また、本発明のバグフィルター用濾過布は、その濾過布を通過する排気ガスに含まれるダイオキシン類物質の濃度を減じることができるが、ここでいう「ダイオキシン類物質」とは、ポリ塩化ジベンゾパラジオキシン (ＰＣＤＤ)、ポリ塩化ジベンゾフラン（ＰＣＤＦ）およびダイオキシン様ポリ塩化ビフェニル(ＤＬ－ＰＣＢ)のことを実質的に指している。より具体的に例示すると、ポリ塩化ジベンゾパラジオキシン (ＰＣＤＤ)としては、例えば、ＴｅＣＤＤ（例えば２,３,７,８－ＴｅＣＤＤなど）、ＰｅＣＤＤ（例えば１,２,３,７,８－ＰｅＣＤＤなど）、ＨｘＣＤＤ（例えば１,２,３,４,７,８－ＨｘＣＤＤ、１,２,３,６,７,８－ＨｘＣＤＤ、１,２,３,７,８,９－ＨｘＣＤＤなど）、ＨｐＣＤＤ（例えば１,２,３,４,６,７,８－ＨｐＣＤＤなど）および／またはＯＣＤＤなどを挙げることができる。ポリ塩化ジベンソフラン（ＰＣＤＦ）としては、例えば、ＴｅＣＤＦ（例えば２,３,７,８－ＴｅＣＤＦなど）、ＰｅＣＤＦ（例えば１,２,３,７,８－ＰｅＣＤＦ、１,２,３,４,８－ＰｅＣＤＦ、２,３,４,７,８－ＰｅＣＤＦ）、ＨｘＣＤＦ（例えば１,２,３,４,７,８－ＨｘＣＤＦ、１,２,３,４,７,９－ＨｘＣＤＦ、１,２,３,６,７,８－ＨｘＣＤＦ、１,２,３,７,８,９－ＨｘＣＤＦ、２,３,４,６,７,８－ＨｘＣＤＦ）、ＨｐＣＤＦ（例えば１,２,３,４,６,７,８－ＨｐＣＤＦ、１,２,３,４,７,８,９－ＨｐＣＤＦ）および／またはＯＣＤＦなどを挙げることができる。また、ダイオキシン様ポリ塩化ビフェニル(ＤＬ－ＰＣＢ)としては、Ｎｏｎ－ｏｒｔｈｏ ＰＣＢ（例えば３,４,４',５－ＴｅＣＢ、３,３',４,４'－ＴｅＣＢ、３,３',４,４',５－ＰｅＣＢ、３,３',４,４',５,５'－ＨｘＣＢ）、Ｍｏｎｏ－ｏｒｔｈｏ ＰＣＢ（例えば２',３,４,４',５－ＰｅＣＢ、２,３',４,４',５－ＰｅＣＢ、２,３,３',４,４'－ＰｅＣＢ、２,３,４,４',５－ＰｅＣＢ、２,３',４,４',５,５'－ＨｘＣＢ、２,３,３',４,４',５－ＨｘＣＢ、２,３,３',４,４',５'－ＨｘＣＢ、２,３,３',４,４',５,５'－ＨｐＣＢ）などを挙げることができる。
In addition, the filter cloth for bag filter of the present invention can reduce the concentration of dioxin substances contained in the exhaust gas passing through the filter cloth. The “dioxin substances” here refers to polychlorinated dibenzoparaffins. It refers essentially to dioxinpox (PCDD), polychlorinated dibenzofuran (PCDF) and dioxin-like polychlorinated biphenyl (DL-PCB). More specifically, examples of polychlorinated dibenzopararadioxin (PCDD) include, for example, TeCDD (for example, 2,3,7,8-TeCDD), PeCDD (for example, 1,2,3,7,8-PeCDD, etc.) ), HxCDD (eg, 1,2,3,4,7,8-HxCDD, 1,2,3,6,7,8-HxCDD, 1,2,3,7,8,9-HxCDD, etc.), HpCDD (For example, 1,2,3,4,6,7,8-HpCDD, etc.) and / or OCDD. Examples of the polychlorinated dibensofuran (PCDF) include TeCDF (for example, 2,3,7,8-TeCDF), PeCDF (for example, 1,2,3,7,8-PeCDF, 1,2,3,4,8). -PeCDF, 2,3,4,7,8-PeCDF), HxCDF (eg 1,2,3,4,7,8-HxCDF, 1,2,3,4,7,9-HxCDF, 1,2 , 3,6,7,8-HxCDF, 1,2,3,7,8,9-HxCDF, 2,3,4,6,7,8-HxCDF), HpCDF (eg, 1,2,3,4) , 6,7,8-HpCDF, 1,2,3,4,7,8,9-HpCDF) and / or OCDF. Further, as dioxin-like polychlorinated biphenyl (DL-PCB), Non-ortho PCB (for example, 3,4,4 ′, 5-TeCB, 3,3 ′, 4,4′-TeCB, 3,3 ′, 4) , 4 ', 5-PeCB, 3,3', 4,4 ', 5,5'-HxCB), Mono-ortho PCB (eg 2', 3,4,4 ', 5-PeCB, 2,3' , 4,4 ′, 5-PeCB, 2,3,3 ′, 4,4′-PeCB, 2,3,4,4 ′, 5-PeCB, 2,3 ′, 4,4 ′, 5,5 '-HxCB, 2,3,3', 4,4 ', 5-HxCB, 2,3,3', 4,4 ', 5'-HxCB, 2,3,3', 4,4 ', 5 , 5′-HpCB).
担持される酸化マンガン、例えば二酸化マンガン（ＭｎＯ２）は、その比表面積が好ましくは２０ｍ２／ｇ～３００ｍ２／ｇ、より好ましくは１００ｍ２／ｇ～３００ｍ２／ｇ、更に好ましくは１３０ｍ２／ｇ～２７０ｍ２／ｇとなっている（例えば、約１５０ｍ２／ｇ、約２００ｍ２／ｇ、約２５０ｍ２／ｇなどであってよい）。ここでいう「比表面積」は、ＢＥＴ比表面積のことを指している。つまり、本発明における「比表面積」は、ＪＩＳ Ｚ ８８３０－１９９０（気体吸着による粉体の比表面積測定方法）に従って測定して得られる比表面積である。具体的な測定装置としては、マウンテック社製のMacsorb model-1201である。
Supported the manganese oxide, for example, manganese dioxide (MnO 2), the specific surface area of preferably 20m 2 / g ~ 300m 2 / g, more preferably 100m 2 / g ~ 300m 2 / g, more preferably 130m 2 / g˜270 m 2 / g (for example, it may be about 150 m 2 / g, about 200 m 2 / g, about 250 m 2 / g, etc.). The “specific surface area” here refers to the BET specific surface area. That is, the “specific surface area” in the present invention is a specific surface area obtained by measurement according to JIS Z 8830-1990 (method for measuring the specific surface area of powder by gas adsorption). A specific measuring device is Macsorb model-1201 manufactured by Mountec.
また、担持される酸化マンガン、例えば二酸化マンガン（ＭｎＯ２）は、その平均粒径が好ましくは０．２μｍ～１０μｍ、より好ましくは０．５μｍ～１．５μｍ、更に好ましくは０．７μｍ～１．３μｍである（例えば、平均粒径が約１μｍであってよい）。尚、ここでいう「平均粒径」は、レーザー回折・散乱法(マイクロトラック法)で測定した粒径を指している。つまり、本発明における「平均粒径」は、レーザー回折・散乱式の粒度分析計を用いて測定して得られる粒径である。具体的なレーザー回折・散乱式の粒度分析計としては、島津製作所社製 SALD-2000Aである。
Further, the supported manganese oxide, for example, manganese dioxide (MnO 2 ), has an average particle size of preferably 0.2 μm to 10 μm, more preferably 0.5 μm to 1.5 μm, still more preferably 0.7 μm to 1. 3 μm (for example, the average particle size may be about 1 μm). Here, the “average particle diameter” refers to a particle diameter measured by a laser diffraction / scattering method (microtrack method). That is, the “average particle diameter” in the present invention is a particle diameter obtained by measurement using a laser diffraction / scattering particle size analyzer. A specific laser diffraction / scattering particle size analyzer is SALD-2000A manufactured by Shimadzu Corporation.
バグフィルター用濾過布に担持されるマンガン酸化物の量、即ち、マンガン酸化物の担持量は、少なくとも１０ｇ／ｍ２であることが好ましく、より好ましくは少なくとも２０ｇ／ｍ２であり、更に好ましくは少なくとも３０ｇ／ｍ２である（例えば少なくとも４０ｇ／ｍ２である）。ここでいう「マンガン酸化物の担持量」とは、濾過布の単位面積当たりのマンガン酸化物の担持量のことを意味している。つまり、バグフィルター用濾過布の濾過面の面積（ｍ２）あたりのマンガン酸化物量が好ましくは少なくとも１０ｇ、より好ましくは少なくとも２０ｇ、更に好ましくは少なくとも３０ｇ（例えば少なくとも４０ｇ）となっている。マンガン酸化物の担持量の上限値は、特に制限はないものの、例えば、好ましくは１６０ｇ／ｍ２、より好ましくは９０ｇ／ｍ２、更に好ましくは５０ｇ／ｍ２程度である。このような比較的少量なマンガン酸化物量であっても、下記で詳述するように、排気ガス中のダイオキシン類物質の濃度を効果的に低減することができる（即ち、排気ガス中のダイオキシン類物質の毒性等価（ｎｇ－ＴＥＱ／Ｎｍ３）を少なくとも約４５％～約７５％減じることができる）。特定の理論に拘束されることを意図しないが、このような比較的少量のマンガン酸化物の担持量であってもダイオキシン濃度が効果的に低減するのは、“バグフィルター用濾過布の布基材自体”と“マンガン酸化物”との相乗効果に起因するものと考えられる。
The amount of manganese oxide supported on the bag filter cloth, that is, the amount of manganese oxide supported is preferably at least 10 g / m 2 , more preferably at least 20 g / m 2 , and still more preferably. At least 30 g / m 2 (eg at least 40 g / m 2 ). The “supported amount of manganese oxide” herein means the supported amount of manganese oxide per unit area of the filter cloth. That is, the amount of manganese oxide per area (m 2 ) of the filtration surface of the bag filter cloth is preferably at least 10 g, more preferably at least 20 g, and even more preferably at least 30 g (for example, at least 40 g). The upper limit of the amount of manganese oxide supported is not particularly limited, but is preferably about 160 g / m 2 , more preferably 90 g / m 2 , and still more preferably about 50 g / m 2 . Even with such a relatively small amount of manganese oxide, the concentration of dioxin substances in the exhaust gas can be effectively reduced (that is, dioxins in the exhaust gas, as will be described in detail below). The toxicity equivalent of the substance (ng-TEQ / Nm 3 ) can be reduced by at least about 45% to about 75%). Although not intending to be bound by a specific theory, even if such a relatively small amount of manganese oxide is supported, the dioxin concentration is effectively reduced by the fact that the filter base of the bag filter filter cloth. This is thought to be due to the synergistic effect of the “material itself” and the “manganese oxide”.
尚、マンガン酸化物が二酸化マンガンである場合、その結晶構造は特に制限されず、例えば、α型、β型、γ型、ε型、R型、λ型またはそれらの少なくとも２種の組合せの結晶構造を有する二酸化マンガンであってよい。ある１つの好適な態様でいえば、本発明のバグフィルター用濾過布に担持される二酸化マンガンは、その結晶構造としてε型（イプシロン型）の部分を少なくとも含んで成る。
When the manganese oxide is manganese dioxide, the crystal structure is not particularly limited. For example, α-type, β-type, γ-type, ε-type, R-type, λ-type, or a combination of at least two of them. It may be manganese dioxide having a structure. In one preferred embodiment, the manganese dioxide supported on the bag filter cloth of the present invention comprises at least an ε-type (epsilon-type) portion as its crystal structure.
濾過布の布基材自体は、織布および不織布（例えばスパンボンドやフェルトなど）の少なくとも一方から成るものであってよい。濾過布の織布または不織布は、フッ素系繊維、ＰＰＳ繊維（ポリフェニレンサルファイド繊維）、アラミド繊維、ポリアミド繊維、ポリイミド繊維、ポリエステル繊維およびアクリル繊維などの合成繊維、木綿および羊毛などの天然繊維、ガラス繊維およびセラミック繊維などの無機繊維、ならびに、ステンレス繊維などの金属繊維から成る群から選択される少なくとも１種の繊維から成るものであってよい。例えば、濾過布の織布または不織布がフッ素系繊維から成ることが好ましい。かかるフッ素系繊維は、例えば、ポリテトラフルオロエチレン繊維（ＰＴＦＥ繊維）であることが好ましい。なぜなら、ごみ焼却施設や、製鉄所・製鋼所または金属精錬工場で使用されるバグフィルターは比較的高温に曝されるところ、濾過布が好適な耐熱性を有していることが求められると共に、少なからずダイオキシン類濃度の低減効果に寄与し得るからである。
The cloth base material itself of the filter cloth may be made of at least one of a woven cloth and a non-woven cloth (for example, spunbond or felt). The woven fabric or non-woven fabric of the filter fabric includes fluorine-based fibers, PPS fibers (polyphenylene sulfide fibers), aramid fibers, polyamide fibers, polyimide fibers, polyester fibers and acrylic fibers, natural fibers such as cotton and wool, glass fibers And inorganic fibers such as ceramic fibers, and at least one fiber selected from the group consisting of metal fibers such as stainless steel fibers. For example, it is preferable that the woven or non-woven fabric of the filter cloth is made of a fluorine-based fiber. Such fluorine-based fibers are preferably, for example, polytetrafluoroethylene fibers (PTFE fibers). Because bag filters used in garbage incineration facilities, steelworks, steelworks or metal smelting plants are exposed to relatively high temperatures, the filter cloth is required to have suitable heat resistance, This is because it can contribute to the effect of reducing the concentration of dioxins.
尚、フッ素系繊維から成る場合、濾過布の布基材はガラス繊維を更に含んで成るものであってよい。即ち、好ましくは布基材がフッ素系繊維（例えばＰＴＦＥ）とガラス繊維とから構成されている。かかる場合、フッ素系繊維（例えばＰＴＦＥ）およびガラス繊維が好適な繊維径を有していることが好ましい。例えば、ガラス繊維の繊度が好ましくは３～１５μｍ、より好ましくは５～１５μｍ（たとえば、５～８μｍ程度あるいは９～１５μｍ程度）である。このようなガラス繊維（上記のような繊度を有するガラス繊維）は、少なからずダイオキシン類濃度の低減に寄与し得るからである。一方、フッ素系繊維の繊維径は例えば６～１２μｍ程度である。尚、濾過布の布基材のガラス繊度についていえば、特に細いもの（例えば上記５～８μｍ程度の繊度）であってよく、そのような細いガラス繊維がフッ素系繊維と共に布基材を構成していてよい。
In addition, when it consists of a fluorine-type fiber, the cloth base material of the filter cloth may further contain glass fiber. That is, the cloth base material is preferably composed of fluorine-based fibers (for example, PTFE) and glass fibers. In such a case, it is preferable that the fluorine-based fiber (for example, PTFE) and the glass fiber have a suitable fiber diameter. For example, the fineness of the glass fiber is preferably 3 to 15 μm, more preferably 5 to 15 μm (for example, about 5 to 8 μm or about 9 to 15 μm). This is because such glass fibers (glass fibers having the fineness as described above) can contribute to a reduction in the concentration of dioxins. On the other hand, the fiber diameter of the fluorinated fiber is, for example, about 6 to 12 μm. Regarding the glass fineness of the cloth base material of the filter cloth, it may be particularly thin (for example, the fineness of about 5 to 8 μm described above), and such thin glass fibers constitute the cloth base material together with the fluorine-based fibers. It may be.
例えば、濾過布の布基材の構成自体は、単一層構成となっていてよいもよいし、複数層構成であってもよい。例えば、単一層構成では、フッ素系繊維および／またはガラス繊維が１つの層を成すように構成されている。一方、複数層では、「フッ素系繊維の層Ａ」と「ガラス繊維を含んだ層Ｂ」とが層状に構成されていてよい。かかる場合、「ガラス繊維を含んだ層Ｂ」に対してマンガン酸化物が担持されていることが好ましい。例示すると、「フッ素系繊維の層Ａ」がＰＴＦＥ成分に加えてテフロン（登録商標）成分を含んで成る層であってもよく、「ガラス繊維を含んだ層Ｂ」が、ガラス繊維成分に加えてＰＴＦＥ基布を有して成るものであってもよく、そのような層Ｂに対してマンガン酸化物触媒が担持されていてよい。あくまでも１つの例にすぎないが、濾過布の布基材は「ガラス繊維を含んだ層Ｂ（特に好ましくはマンガン酸化物触媒が担持された層Ｂ）」が「フッ素系繊維の層Ａ」で両側面から挟まれたような３層構造を有するものであってもよい。
For example, the structure itself of the cloth base material of the filter cloth may be a single layer structure or a multiple layer structure. For example, in the single layer configuration, the fluorine-based fiber and / or the glass fiber are configured to form one layer. On the other hand, in the plurality of layers, the “fluorine fiber layer A” and the “glass fiber-containing layer B” may be formed in layers. In such a case, it is preferable that manganese oxide is supported on the “layer B containing glass fibers”. For example, the “fluorine fiber layer A” may be a layer containing a Teflon (registered trademark) component in addition to the PTFE component, and the “layer B containing glass fiber” may be added to the glass fiber component. In other words, the layer B may have a manganese oxide catalyst supported thereon. Although only one example, the cloth base material of the filter cloth is “layer B containing glass fibers (particularly preferably, layer B carrying a manganese oxide catalyst)” is “fluorine-based fiber layer A”. It may have a three-layer structure sandwiched from both sides.
本発明に係るバグフィルター用濾過布（即ち、マンガン酸化物を担持された後の状態の濾過布）は、その通気度が、好ましくは３～２０ｃｍ３／ｃｍ２／ｓｅｃ、より好ましくは３～１５ｃｍ３／ｃｍ２／ｓｅｃ、更に好ましくは４～１０ｃｍ３／ｃｍ２／ｓｅｃ程度となっている。一方、マンガン酸化物を担持する前の状態の濾過布の通気度は、好ましくは５～５０ｃｍ３／ｃｍ２／ｓｅｃ、より好ましくは７～３０ｃｍ３／ｃｍ２／ｓｅｃ、更に好ましくは１０～３０ｃｍ３／ｃｍ２／ｓｅｃ程度となっていてよい。ここでいう「通気度（マンガン酸化物の担持前または担持後）」とは、ＪＩＳ－Ｌ－１０９６ ８． ２７．１ Ａ法（フラジール法）によって測定した通気度値を指している。尚、本発明に係るバグフィルター用濾過布（マンガン酸化物が担持された濾過布）は、その厚さが例えば１．０ｍｍ～２０ｍｍ程度、好ましくは１．５ｍｍ～５．０ｍｍ、更に好ましくは１．５ｍｍ～３．０ｍｍ程度であってよい。本発明では、このように薄い濾過布であっても（即ち、従前のハニカム触媒層・触媒反応塔などと比較すると、触媒接触時間が極端に短いと考えられる条件であっても）、上述したように排気ガス中のダイオキシン類物質の濃度を効果的に低減できる。
The filter cloth for bag filter according to the present invention (that is, the filter cloth in a state after being supported with manganese oxide) has an air permeability of preferably 3 to 20 cm 3 / cm 2 / sec, more preferably 3 to It is about 15 cm 3 / cm 2 / sec, more preferably about 4 to 10 cm 3 / cm 2 / sec. On the other hand, the air permeability of the filter cloth before supporting the manganese oxide is preferably 5 to 50 cm 3 / cm 2 / sec, more preferably 7 to 30 cm 3 / cm 2 / sec, and still more preferably 10 to 30 cm. It may be about 3 / cm 2 / sec. As used herein, “air permeability (before or after supporting manganese oxide)” refers to JIS-L-1096. 27.1 Percentage value measured by the A method (Fragile method). The bag filter filter cloth (filter cloth carrying manganese oxide) according to the present invention has a thickness of, for example, about 1.0 mm to 20 mm, preferably 1.5 mm to 5.0 mm, and more preferably 1 mm. It may be about 5 mm to 3.0 mm. In the present invention, even with such a thin filter cloth (that is, even if the catalyst contact time is considered to be extremely short compared to the conventional honeycomb catalyst layer / catalyst reaction tower, etc.), As described above, the concentration of dioxins in the exhaust gas can be effectively reduced.
本発明に係るバグフィルター用濾過布（即ち、マンガン酸化物を担持された後の状態の濾過布）は、無機化合物（触媒担持に際して用いられる無機化合物）を有して成り、より好ましくは珪素化合物を有して成り得る。つまり、本発明に係るバグフィルター用濾過布は、布基材の繊維に加えて珪素化合物を含んで成るものであってよい。珪素化合物は、例えばアモルファスシリカであることが好ましい。このような珪素化合物は、マンガン酸化物触媒と共に「ガラス繊維を含んだ層Ｂ」に含まれていてよい。かかる場合、珪素化合物は、「ガラス繊維を含んだ層Ｂ」において、好ましくは１０～８０ｇ／ｍ２の含有量、より好ましくは２０～７０ｇ／ｍ２の含有量（層Ｂ全体基準）であってよい。このような珪素化合物は、“バグフィルター用濾過布の布基材自体”および／または“マンガン酸化物”と相俟ることでダイオキシン類濃度の低減効果に寄与し得る。
The filter cloth for bag filter according to the present invention (that is, the filter cloth in a state after supporting manganese oxide) comprises an inorganic compound (an inorganic compound used for supporting the catalyst), more preferably a silicon compound. Can be formed. That is, the filter cloth for bag filters according to the present invention may comprise a silicon compound in addition to the fibers of the cloth base material. The silicon compound is preferably amorphous silica, for example. Such a silicon compound may be contained in the “layer B containing glass fibers” together with the manganese oxide catalyst. In such a case, the silicon compound preferably has a content of 10 to 80 g / m 2 , more preferably a content of 20 to 70 g / m 2 (based on the entire layer B) in the “layer B including glass fibers”. It's okay. Such a silicon compound can contribute to the effect of reducing the concentration of dioxins by combining with “the cloth base material itself of the filter cloth for bag filter” and / or “manganese oxide”.
バグフィルター用濾過布におけるマンガン酸化物の担持形態は、布基材に対してマンガン酸化物が設けられていれば、特に制限はない。例えば、以下の手法によりマンガン酸化物をバグフィルター用濾過布の布基材に担持させることができる。
（１）マンガン酸化物分散液への含浸による担持
かかる担持形態は、マンガン酸化物の分散液に対してバグフィルター用濾過布を浸漬させることによってマンガン酸化物を濾過布に設ける形態である。より具体的には、図３（ａ）に示すように、「水または揮発性有機溶剤などを少なくとも含んで成る分散媒に対してマンガン酸化物を分散させた原液」にバグフィルター用濾過布を浸漬させ、次いで、乾燥に付す。これにより、マンガン酸化物が濾過布に残るので、マンガン酸化物が好適に担持される。尚、布基材に珪素化合物を設ける場合には、バグフィルター用濾過布が浸漬される上記原液に珪素化合物（例えばアモルファスシリカ）を含ませておけばよい。
（２）布基材繊維への練込みによる担持
かかる担持形態は、予め布基材繊維に対してマンガン酸化物を練り込むことによりマンガン酸化物を濾過布に設ける形態である。つまり、図３（ｂ）に示すように、基材繊維の形成時にマンガン酸化物を含ませておき、得られたマンガン酸化物含有繊維を用いてバグフィルター用濾過布を得る形態である。
（３）スラリー・コーティングの挟込みによる担持
かかる担持形態は、基布（織布）に対してコーティングしたマンガン酸化物含有スラリーをウェブ（例えば綿状布）で挟み込むことによりマンガン酸化物を濾過布に設ける形態である。より具体的には、図３（ｃ）に示すように、「水または揮発性有機溶剤などを少なくとも含んで成る分散媒に対してマンガン酸化物を分散させたスラリー状原液」を基布（織布）にコーティングした後、それをウェブ（例えば綿状布）で両側から挟み込み、次いで、乾燥に付す（必要に応じてニードリング処理を施す）。これにより、マンガン酸化物が濾過布に残るので、マンガン酸化物が好適に担持される。尚、布基材に珪素化合物を設ける場合には、上記スラリー原液に珪素化合物（例えばアモルファスシリカ）を含ませておけばよい。
（４）含浸基布の挟込みによる担持
かかる担持形態は、マンガン酸化物の分散液を含浸させた布部材（例えば基布および／または繊維層）を別の繊維層やウェブ（例えば綿状布）で挟み込むことによりマンガン酸化物を濾過布に設ける形態である。より具体的には、図３（ｄ）に示すように、「水または揮発性有機溶剤などを少なくとも含んで成る分散媒に対してマンガン酸化物を分散させた原液」にバグフィルター用布部材を浸漬させ、それによって得られる含浸布部材を別の繊維層やウェブ（例えば綿状布）で両側から挟み込み、次いで、乾燥に付す（必要に応じてニードリング処理を施す）。これにより、マンガン酸化物がバグフィルター用濾過布に残るので、マンガン酸化物が好適に担持される。尚、布部材に珪素化合物を設ける場合には、かかる布部材が浸漬される上記原液に対して珪素化合物（例えばアモルファスシリカ）を含ませておけばよい。 The manner of supporting manganese oxide in the filter cloth for bag filter is not particularly limited as long as manganese oxide is provided on the cloth base material. For example, manganese oxide can be supported on the cloth base material of a bag filter cloth by the following method.
(1) Carrying by impregnation in manganese oxide dispersion The carrying form is a form in which manganese oxide is provided on the filter cloth by immersing the bag cloth filter cloth in the manganese oxide dispersion. More specifically, as shown in FIG. 3 (a), a filter cloth for a bag filter is applied to “a stock solution in which manganese oxide is dispersed in a dispersion medium containing at least water or a volatile organic solvent”. Soak and then subject to drying. Thereby, since manganese oxide remains in the filter cloth, manganese oxide is suitably supported. In the case where a silicon compound is provided on the cloth base, a silicon compound (for example, amorphous silica) may be included in the stock solution in which the bag filter cloth is immersed.
(2) Support by kneading into cloth base fiber This support form is a form in which manganese oxide is provided on the filter cloth by kneading manganese oxide into the cloth base fiber in advance. That is, as shown in FIG.3 (b), it is the form which obtains the filter cloth for bag filters using the manganese oxide containing fiber obtained by including manganese oxide at the time of formation of a base fiber.
(3) Supporting by sandwiching slurry coating This supporting form is a filter cloth in which manganese oxide-containing slurry coated on a base cloth (woven cloth) is sandwiched between webs (for example, cotton-like cloth). It is a form provided in More specifically, as shown in FIG. 3C, a “slurry stock solution in which manganese oxide is dispersed in a dispersion medium containing at least water or a volatile organic solvent” is used as a base fabric (woven fabric). After being coated on the cloth), it is sandwiched from both sides with a web (for example, cotton-like cloth), and then subjected to drying (needling treatment is performed if necessary). Thereby, since manganese oxide remains in the filter cloth, manganese oxide is suitably supported. When a silicon compound is provided on the cloth base material, a silicon compound (for example, amorphous silica) may be included in the slurry stock solution.
(4) Support by sandwiching impregnated base fabric This support form is obtained by using a fabric member (eg, base fabric and / or fiber layer) impregnated with a manganese oxide dispersion as another fiber layer or web (eg, cotton-like fabric). ) To provide manganese oxide on the filter cloth. More specifically, as shown in FIG. 3 (d), the bag member for bag filter is attached to a “stock solution in which manganese oxide is dispersed in a dispersion medium containing at least water or a volatile organic solvent”. The impregnated cloth member obtained by soaking is sandwiched from both sides by another fiber layer or web (for example, cotton-like cloth), and then subjected to drying (needling treatment is performed if necessary). Thereby, since manganese oxide remains in the filter cloth for bag filters, manganese oxide is suitably supported. In addition, when providing a silicon compound in a cloth member, a silicon compound (for example, amorphous silica) may be included in the stock solution in which the cloth member is immersed.
（１）マンガン酸化物分散液への含浸による担持
かかる担持形態は、マンガン酸化物の分散液に対してバグフィルター用濾過布を浸漬させることによってマンガン酸化物を濾過布に設ける形態である。より具体的には、図３（ａ）に示すように、「水または揮発性有機溶剤などを少なくとも含んで成る分散媒に対してマンガン酸化物を分散させた原液」にバグフィルター用濾過布を浸漬させ、次いで、乾燥に付す。これにより、マンガン酸化物が濾過布に残るので、マンガン酸化物が好適に担持される。尚、布基材に珪素化合物を設ける場合には、バグフィルター用濾過布が浸漬される上記原液に珪素化合物（例えばアモルファスシリカ）を含ませておけばよい。
（２）布基材繊維への練込みによる担持
かかる担持形態は、予め布基材繊維に対してマンガン酸化物を練り込むことによりマンガン酸化物を濾過布に設ける形態である。つまり、図３（ｂ）に示すように、基材繊維の形成時にマンガン酸化物を含ませておき、得られたマンガン酸化物含有繊維を用いてバグフィルター用濾過布を得る形態である。
（３）スラリー・コーティングの挟込みによる担持
かかる担持形態は、基布（織布）に対してコーティングしたマンガン酸化物含有スラリーをウェブ（例えば綿状布）で挟み込むことによりマンガン酸化物を濾過布に設ける形態である。より具体的には、図３（ｃ）に示すように、「水または揮発性有機溶剤などを少なくとも含んで成る分散媒に対してマンガン酸化物を分散させたスラリー状原液」を基布（織布）にコーティングした後、それをウェブ（例えば綿状布）で両側から挟み込み、次いで、乾燥に付す（必要に応じてニードリング処理を施す）。これにより、マンガン酸化物が濾過布に残るので、マンガン酸化物が好適に担持される。尚、布基材に珪素化合物を設ける場合には、上記スラリー原液に珪素化合物（例えばアモルファスシリカ）を含ませておけばよい。
（４）含浸基布の挟込みによる担持
かかる担持形態は、マンガン酸化物の分散液を含浸させた布部材（例えば基布および／または繊維層）を別の繊維層やウェブ（例えば綿状布）で挟み込むことによりマンガン酸化物を濾過布に設ける形態である。より具体的には、図３（ｄ）に示すように、「水または揮発性有機溶剤などを少なくとも含んで成る分散媒に対してマンガン酸化物を分散させた原液」にバグフィルター用布部材を浸漬させ、それによって得られる含浸布部材を別の繊維層やウェブ（例えば綿状布）で両側から挟み込み、次いで、乾燥に付す（必要に応じてニードリング処理を施す）。これにより、マンガン酸化物がバグフィルター用濾過布に残るので、マンガン酸化物が好適に担持される。尚、布部材に珪素化合物を設ける場合には、かかる布部材が浸漬される上記原液に対して珪素化合物（例えばアモルファスシリカ）を含ませておけばよい。 The manner of supporting manganese oxide in the filter cloth for bag filter is not particularly limited as long as manganese oxide is provided on the cloth base material. For example, manganese oxide can be supported on the cloth base material of a bag filter cloth by the following method.
(1) Carrying by impregnation in manganese oxide dispersion The carrying form is a form in which manganese oxide is provided on the filter cloth by immersing the bag cloth filter cloth in the manganese oxide dispersion. More specifically, as shown in FIG. 3 (a), a filter cloth for a bag filter is applied to “a stock solution in which manganese oxide is dispersed in a dispersion medium containing at least water or a volatile organic solvent”. Soak and then subject to drying. Thereby, since manganese oxide remains in the filter cloth, manganese oxide is suitably supported. In the case where a silicon compound is provided on the cloth base, a silicon compound (for example, amorphous silica) may be included in the stock solution in which the bag filter cloth is immersed.
(2) Support by kneading into cloth base fiber This support form is a form in which manganese oxide is provided on the filter cloth by kneading manganese oxide into the cloth base fiber in advance. That is, as shown in FIG.3 (b), it is the form which obtains the filter cloth for bag filters using the manganese oxide containing fiber obtained by including manganese oxide at the time of formation of a base fiber.
(3) Supporting by sandwiching slurry coating This supporting form is a filter cloth in which manganese oxide-containing slurry coated on a base cloth (woven cloth) is sandwiched between webs (for example, cotton-like cloth). It is a form provided in More specifically, as shown in FIG. 3C, a “slurry stock solution in which manganese oxide is dispersed in a dispersion medium containing at least water or a volatile organic solvent” is used as a base fabric (woven fabric). After being coated on the cloth), it is sandwiched from both sides with a web (for example, cotton-like cloth), and then subjected to drying (needling treatment is performed if necessary). Thereby, since manganese oxide remains in the filter cloth, manganese oxide is suitably supported. When a silicon compound is provided on the cloth base material, a silicon compound (for example, amorphous silica) may be included in the slurry stock solution.
(4) Support by sandwiching impregnated base fabric This support form is obtained by using a fabric member (eg, base fabric and / or fiber layer) impregnated with a manganese oxide dispersion as another fiber layer or web (eg, cotton-like fabric). ) To provide manganese oxide on the filter cloth. More specifically, as shown in FIG. 3 (d), the bag member for bag filter is attached to a “stock solution in which manganese oxide is dispersed in a dispersion medium containing at least water or a volatile organic solvent”. The impregnated cloth member obtained by soaking is sandwiched from both sides by another fiber layer or web (for example, cotton-like cloth), and then subjected to drying (needling treatment is performed if necessary). Thereby, since manganese oxide remains in the filter cloth for bag filters, manganese oxide is suitably supported. In addition, when providing a silicon compound in a cloth member, a silicon compound (for example, amorphous silica) may be included in the stock solution in which the cloth member is immersed.
本発明のバグフィルター用濾過布は、そこを通過する排気ガスのダイオキシン類の濃度を効果的に減じることができる。より具体的には、本発明のバグフィルター用濾過布では、以下条件下にてダイオキシン類物質の毒性等価（ｎｇ－ＴＥＱ／Ｎｍ３）を好ましくは４０％～９０％低減（例えば４５％～７５％低減または５０％～７０％低減）することができる。
・排気ガス線速度：０．８～１．２ｍ／ｓｅｃ
・排気ガス温度：１００～２００℃（例えば、バグフィルター用濾過布の通過後における排気ガス温度）
・濾過前の排気ガス中のダイオキシン濃度：１～５ｎｇ－ＴＥＱ／Ｎｍ３
・濾過面積：１２０～１６０ｃｍ２（例えば、かかる濾過面積における濾過布の厚さは２．０ｍｍ～３．０ｍｍである）
The filter cloth for bag filter of the present invention can effectively reduce the concentration of dioxins in exhaust gas passing therethrough. More specifically, in the filter cloth for bag filter of the present invention, the toxic equivalent (ng-TEQ / Nm 3 ) of dioxins is preferably reduced by 40% to 90% (for example, 45% to 75%) under the following conditions. % Reduction or 50% to 70% reduction).
・ Exhaust gas linear velocity: 0.8-1.2m / sec
・ Exhaust gas temperature: 100 to 200 ° C. (for example, exhaust gas temperature after passing through filter cloth for bag filter)
・ Dioxin concentration in the exhaust gas before filtration: 1 to 5 ng-TEQ / Nm 3
Filtration area: 120 to 160 cm 2 (for example, the thickness of the filter cloth in the filtration area is 2.0 mm to 3.0 mm)
・排気ガス線速度：０．８～１．２ｍ／ｓｅｃ
・排気ガス温度：１００～２００℃（例えば、バグフィルター用濾過布の通過後における排気ガス温度）
・濾過前の排気ガス中のダイオキシン濃度：１～５ｎｇ－ＴＥＱ／Ｎｍ３
・濾過面積：１２０～１６０ｃｍ２（例えば、かかる濾過面積における濾過布の厚さは２．０ｍｍ～３．０ｍｍである）
The filter cloth for bag filter of the present invention can effectively reduce the concentration of dioxins in exhaust gas passing therethrough. More specifically, in the filter cloth for bag filter of the present invention, the toxic equivalent (ng-TEQ / Nm 3 ) of dioxins is preferably reduced by 40% to 90% (for example, 45% to 75%) under the following conditions. % Reduction or 50% to 70% reduction).
・ Exhaust gas linear velocity: 0.8-1.2m / sec
・ Exhaust gas temperature: 100 to 200 ° C. (for example, exhaust gas temperature after passing through filter cloth for bag filter)
・ Dioxin concentration in the exhaust gas before filtration: 1 to 5 ng-TEQ / Nm 3
Filtration area: 120 to 160 cm 2 (for example, the thickness of the filter cloth in the filtration area is 2.0 mm to 3.0 mm)
本発明のバグフィルター用濾過布に供される排気ガスは、少なくともダイオキシン類物質を含んだものである。特に制限するわけではないが、例えば、バグフィルター用濾過布に供される排気ガスの温度は、好ましくは８０℃～２５０℃程度、より好ましくは１００℃～２００℃程度、更に好ましくは１２０℃～１８０℃程度である。
The exhaust gas provided to the bag filter cloth of the present invention contains at least a dioxin substance. Although not particularly limited, for example, the temperature of the exhaust gas supplied to the bag filter cloth is preferably about 80 ° C. to 250 ° C., more preferably about 100 ° C. to 200 ° C., and still more preferably 120 ° C. to It is about 180 ° C.
［本発明のバグフィルター装置］
本発明のバグフィルター装置は、上述のバグフィルター用濾過布を有して成ることを特徴としている。即ち、本発明のバグフィルター装置は、ダイオキシン類物質を減じるための触媒としてマンガン酸化物が担持されたバグフィルター用濾過布を有して成る。例えば、本発明のバグフィルター装置は、ダイオキシン類物質を減じるための触媒として二酸化マンガン（ＭｎＯ２）が担持されたバグフィルター用濾過布を有して成る。本発明の装置に用いられるバグフィルター用濾過布については、上述の［本発明のバグフィルター用濾過布］で触れているので、重複を避けるために説明を省略する。尚、バグフィルター装置においては、マンガン酸化物がバグフィルター用濾過布にまんべんなく担持されていてよいものの、排気ガスが良く通過する部分とそうでない部分が存在する場合では、排気ガスが良く通過する部分に対してより多くのマンガン酸化物が担持されてよい。 [Bug filter device of the present invention]
The bag filter device of the present invention is characterized by comprising the above-described bag filter cloth. That is, the bag filter device of the present invention comprises a filter cloth for bag filter carrying manganese oxide as a catalyst for reducing dioxins. For example, the bag filter device of the present invention comprises a bag filter filter cloth on which manganese dioxide (MnO 2 ) is supported as a catalyst for reducing dioxins. Since the filter cloth for bag filter used in the apparatus of the present invention is touched in the above-mentioned [filter cloth for bag filter of the present invention], description thereof is omitted to avoid duplication. In the bag filter device, manganese oxide may be evenly supported on the bag filter cloth, but when there is a portion through which exhaust gas passes well and a portion through which exhaust gas does not pass, there is a portion through which exhaust gas passes well. More manganese oxide may be supported.
本発明のバグフィルター装置は、上述のバグフィルター用濾過布を有して成ることを特徴としている。即ち、本発明のバグフィルター装置は、ダイオキシン類物質を減じるための触媒としてマンガン酸化物が担持されたバグフィルター用濾過布を有して成る。例えば、本発明のバグフィルター装置は、ダイオキシン類物質を減じるための触媒として二酸化マンガン（ＭｎＯ２）が担持されたバグフィルター用濾過布を有して成る。本発明の装置に用いられるバグフィルター用濾過布については、上述の［本発明のバグフィルター用濾過布］で触れているので、重複を避けるために説明を省略する。尚、バグフィルター装置においては、マンガン酸化物がバグフィルター用濾過布にまんべんなく担持されていてよいものの、排気ガスが良く通過する部分とそうでない部分が存在する場合では、排気ガスが良く通過する部分に対してより多くのマンガン酸化物が担持されてよい。 [Bug filter device of the present invention]
The bag filter device of the present invention is characterized by comprising the above-described bag filter cloth. That is, the bag filter device of the present invention comprises a filter cloth for bag filter carrying manganese oxide as a catalyst for reducing dioxins. For example, the bag filter device of the present invention comprises a bag filter filter cloth on which manganese dioxide (MnO 2 ) is supported as a catalyst for reducing dioxins. Since the filter cloth for bag filter used in the apparatus of the present invention is touched in the above-mentioned [filter cloth for bag filter of the present invention], description thereof is omitted to avoid duplication. In the bag filter device, manganese oxide may be evenly supported on the bag filter cloth, but when there is a portion through which exhaust gas passes well and a portion through which exhaust gas does not pass, there is a portion through which exhaust gas passes well. More manganese oxide may be supported.
本発明のバグフィルター装置の構成および形態などは、常套的なバグフィルターと同様であれば、特に制限はない。１つ例示しておくと、本発明のバグフィルター装置は、図４に示すように、上述のバグフィルター用濾過布１０（特に円筒形状に縫製されたバグフィルター用濾過布）およびそれに用いられるリテーナー具２０、ならびに、それらを収容するハウジング３０（ハウジング上部にはバグフィルターを吊下げる器具などが設けられている一方、ハウジング下部には、ロータリーバルブ３６が付属したホッパー部３８などが設けられている）から少なくとも構成されるものであってよい。
The configuration and form of the bag filter device of the present invention is not particularly limited as long as it is the same as a conventional bug filter. As an example, as shown in FIG. 4, the bag filter device of the present invention includes the above-described bag filter filter cloth 10 (particularly a bag filter filter cloth sewn in a cylindrical shape) and a retainer used therefor. The tool 20 and the housing 30 for housing them (the upper part of the housing is provided with a device for hanging the bag filter, etc., while the lower part of the housing is provided with a hopper 38 with a rotary valve 36 attached thereto. ) At least.
以上、本発明の好適な態様を中心に説明してきたが、本発明はこれに限定されず、種々の改変がなされ得ることを当業者は容易に理解されよう。例えば、本発明においては以下のような変更態様が考えられる。
As described above, the preferred embodiment of the present invention has been mainly described. However, the present invention is not limited to this, and those skilled in the art will easily understand that various modifications can be made. For example, the following modifications can be considered in the present invention.
本発明のバグフィルター用濾過布は、あくまでも「ダイオキシン類を減じるための触媒」としてマンガン酸化物のみが担持されていればよいので、ＨＣｌ、ＳＯｘおよび／またはＮＯｘなど、ダイオキシン類以外の有害物質を減じるための触媒であれば、必要に応じてかかる触媒がバグフィルター用濾過布に担持されていてもよい。
Since the filter cloth for bag filters of the present invention only needs to support manganese oxide as a “catalyst for reducing dioxins”, it does not contain harmful substances other than dioxins such as HCl, SOx and / or NOx. As long as it is a catalyst for reduction, such a catalyst may be carried on a bag filter cloth as necessary.
＜実施例１＞
マンガン酸化物が担持されたバグフィルター用濾過布のダイオキシン類の低減効果を確認するために、以下の試験を行った。 <Example 1>
In order to confirm the dioxin reduction effect of the filter cloth for bag filters carrying manganese oxide, the following tests were conducted.
マンガン酸化物が担持されたバグフィルター用濾過布のダイオキシン類の低減効果を確認するために、以下の試験を行った。 <Example 1>
In order to confirm the dioxin reduction effect of the filter cloth for bag filters carrying manganese oxide, the following tests were conducted.
（試験方法）
以下の表１および図５に示すバグフィルター用濾過布から成るバグフィルターを図６に示す試験装置に装着した。表２に示す条件でバグフィルター用濾過布に通気し、バグフィルターの上流側および下流側でダイオキシン類濃度を測定した（図７も併せて参照のこと）。具体的には、試験手順は以下の通りである。 (Test method)
A bag filter made of the filter cloth for bag filter shown in Table 1 below and FIG. 5 was attached to the test apparatus shown in FIG. The bag filter was ventilated under the conditions shown in Table 2, and dioxin concentrations were measured on the upstream side and downstream side of the bag filter (see also FIG. 7). Specifically, the test procedure is as follows.
以下の表１および図５に示すバグフィルター用濾過布から成るバグフィルターを図６に示す試験装置に装着した。表２に示す条件でバグフィルター用濾過布に通気し、バグフィルターの上流側および下流側でダイオキシン類濃度を測定した（図７も併せて参照のこと）。具体的には、試験手順は以下の通りである。 (Test method)
A bag filter made of the filter cloth for bag filter shown in Table 1 below and FIG. 5 was attached to the test apparatus shown in FIG. The bag filter was ventilated under the conditions shown in Table 2, and dioxin concentrations were measured on the upstream side and downstream side of the bag filter (see also FIG. 7). Specifically, the test procedure is as follows.
１．試験条件の調整
１）コンプレッサエアー及びボンベガスを混合し、所定の酸素・窒素酸化物濃度の模擬ガスを調整した。
２）水分は、水を加熱気化させることにより模擬ガスに供給した。
３）某焼却施設の飛灰から抽出・調整した約４０００ｎｇ－ＴＥＱ／Ｌのダイオキシン類－メタノール溶液を、窒素気流下で電気管状炉に噴霧して加熱気化させ、模擬ガスに混合した。
４）バグフィルターを通過する模擬ガスの流量が所定の線速度（ＬＶ）となるようにエアーポンプの吸引量を調節した。過剰のガスは入口濃度の確認に用いた。
５）試験温度は、バグフィルター出口付近の温度が所定温度となるように恒温槽温度を調節した。
２．ダイオキシン類のサンプリング
１）試験装置内へのダイオキシン類の吸着等によるダイオキシン類濃度の影響を考慮し、事前に１０時間以上模擬ガスの流通を行った。
２）ダイオキシンン類を採取するに先立っては、所定温度および線速度（ＬＶ）で模擬ガスを４時間流通してバグフィルターの状態をできるだけ安定させた。
３）引き続き、ＪＩＳ Ｋ０３１１に準じてバグフィルターの上流側および下流側にてダイオキシン類を４時間採取し、分析に供した。
４）ダイオキシン類の測定中はバグフィルターの下流側で酸素濃度を連続的に測定し、試験条件の監視を行った。
[表１]
[表２]
1. Adjustment of test conditions 1) Compressor air and cylinder gas were mixed to prepare a simulated gas having a predetermined oxygen / nitrogen oxide concentration.
2) Water was supplied to the simulated gas by heating and vaporizing the water.
3) About 4000 ng-TEQ / L of dioxins-methanol solution extracted and adjusted from the fly ash of the incineration facility was sprayed into an electric tube furnace under a nitrogen stream, heated and vaporized, and mixed with the simulated gas.
4) The suction amount of the air pump was adjusted so that the flow rate of the simulated gas passing through the bag filter was a predetermined linear velocity (LV). Excess gas was used to confirm the inlet concentration.
5) The test temperature was adjusted so that the temperature in the vicinity of the bag filter outlet was a predetermined temperature.
2. Sampling of dioxins 1) Considering the influence of dioxins concentration due to adsorption of dioxins into the test equipment, simulated gas was circulated for 10 hours or more in advance.
2) Prior to collecting dioxins, simulated gas was circulated for 4 hours at a predetermined temperature and linear velocity (LV) to stabilize the bag filter as much as possible.
3) Subsequently, dioxins were collected for 4 hours on the upstream and downstream sides of the bag filter in accordance with JIS K0311 and subjected to analysis.
4) During the measurement of dioxins, the oxygen concentration was continuously measured downstream of the bag filter, and the test conditions were monitored.
[Table 1]
[Table 2]
１）コンプレッサエアー及びボンベガスを混合し、所定の酸素・窒素酸化物濃度の模擬ガスを調整した。
２）水分は、水を加熱気化させることにより模擬ガスに供給した。
３）某焼却施設の飛灰から抽出・調整した約４０００ｎｇ－ＴＥＱ／Ｌのダイオキシン類－メタノール溶液を、窒素気流下で電気管状炉に噴霧して加熱気化させ、模擬ガスに混合した。
４）バグフィルターを通過する模擬ガスの流量が所定の線速度（ＬＶ）となるようにエアーポンプの吸引量を調節した。過剰のガスは入口濃度の確認に用いた。
５）試験温度は、バグフィルター出口付近の温度が所定温度となるように恒温槽温度を調節した。
２．ダイオキシン類のサンプリング
１）試験装置内へのダイオキシン類の吸着等によるダイオキシン類濃度の影響を考慮し、事前に１０時間以上模擬ガスの流通を行った。
２）ダイオキシンン類を採取するに先立っては、所定温度および線速度（ＬＶ）で模擬ガスを４時間流通してバグフィルターの状態をできるだけ安定させた。
３）引き続き、ＪＩＳ Ｋ０３１１に準じてバグフィルターの上流側および下流側にてダイオキシン類を４時間採取し、分析に供した。
４）ダイオキシン類の測定中はバグフィルターの下流側で酸素濃度を連続的に測定し、試験条件の監視を行った。
[表１]
[表２]
2) Water was supplied to the simulated gas by heating and vaporizing the water.
3) About 4000 ng-TEQ / L of dioxins-methanol solution extracted and adjusted from the fly ash of the incineration facility was sprayed into an electric tube furnace under a nitrogen stream, heated and vaporized, and mixed with the simulated gas.
4) The suction amount of the air pump was adjusted so that the flow rate of the simulated gas passing through the bag filter was a predetermined linear velocity (LV). Excess gas was used to confirm the inlet concentration.
5) The test temperature was adjusted so that the temperature in the vicinity of the bag filter outlet was a predetermined temperature.
2. Sampling of dioxins 1) Considering the influence of dioxins concentration due to adsorption of dioxins into the test equipment, simulated gas was circulated for 10 hours or more in advance.
2) Prior to collecting dioxins, simulated gas was circulated for 4 hours at a predetermined temperature and linear velocity (LV) to stabilize the bag filter as much as possible.
3) Subsequently, dioxins were collected for 4 hours on the upstream and downstream sides of the bag filter in accordance with JIS K0311 and subjected to analysis.
4) During the measurement of dioxins, the oxygen concentration was continuously measured downstream of the bag filter, and the test conditions were monitored.
[Table 1]
[Table 2]
３．試験ガスの実条件
上記条件で試験した際に得られた実際の実条件を表３に示す。
[表３]
3. Actual conditions of test gas Table 3 shows actual conditions obtained when the test was performed under the above conditions.
[Table 3]
上記条件で試験した際に得られた実際の実条件を表３に示す。
[表３]
[Table 3]
（試験結果）
試験結果を以下の表４に示す。
[表４]
(Test results)
The test results are shown in Table 4 below.
[Table 4]
試験結果を以下の表４に示す。
[表４]
The test results are shown in Table 4 below.
[Table 4]
上記実証試験から分かるように、マンガン酸化物が担持されたバグフィルター用濾過布はダイオキシン類の低減効果を奏することが確認できた。具体的には、上記試験条件下にてダイオキシン類物質の濃度（国際毒性等価換算濃度）を４５％～７５％低減することができることを確認できた。
As can be seen from the above demonstration test, it was confirmed that the filter cloth for bag filter loaded with manganese oxide has the effect of reducing dioxins. Specifically, it was confirmed that the concentration of dioxins (international equivalent equivalent concentration) could be reduced by 45% to 75% under the above test conditions.
＜実施例２＞
次に、マンガン酸化物が担持されたバグフィルター（上記実施例１の供試体Ｃに相当。）と、五酸化バナジウムが担持されたバグフィルター（以下、供試体Ｅと言う。）とのダイオキシン類の低減効果の違いを確認するために、以下の試験を行った。 <Example 2>
Next, dioxins of a bag filter carrying manganese oxide (corresponding to the specimen C of Example 1 above) and a bag filter carrying vanadium pentoxide (hereinafter referred to as specimen E). In order to confirm the difference in the reduction effect, the following tests were conducted.
次に、マンガン酸化物が担持されたバグフィルター（上記実施例１の供試体Ｃに相当。）と、五酸化バナジウムが担持されたバグフィルター（以下、供試体Ｅと言う。）とのダイオキシン類の低減効果の違いを確認するために、以下の試験を行った。 <Example 2>
Next, dioxins of a bag filter carrying manganese oxide (corresponding to the specimen C of Example 1 above) and a bag filter carrying vanadium pentoxide (hereinafter referred to as specimen E). In order to confirm the difference in the reduction effect, the following tests were conducted.
（試験方法）
以下の表５に示すバグフィルター用濾過布から成るバグフィルターを図６に示す試験装置に装着した。表６に示す条件でバグフィルター用濾過布に通気し、バグフィルターの上流側および下流側でダイオキシン類濃度を測定した。具体的には、試験手順は以下の通りである。 (Test method)
A bag filter made of a filter cloth for bag filter shown in Table 5 below was attached to the test apparatus shown in FIG. The bag cloth was ventilated under the conditions shown in Table 6, and the dioxins concentration was measured on the upstream side and downstream side of the bag filter. Specifically, the test procedure is as follows.
以下の表５に示すバグフィルター用濾過布から成るバグフィルターを図６に示す試験装置に装着した。表６に示す条件でバグフィルター用濾過布に通気し、バグフィルターの上流側および下流側でダイオキシン類濃度を測定した。具体的には、試験手順は以下の通りである。 (Test method)
A bag filter made of a filter cloth for bag filter shown in Table 5 below was attached to the test apparatus shown in FIG. The bag cloth was ventilated under the conditions shown in Table 6, and the dioxins concentration was measured on the upstream side and downstream side of the bag filter. Specifically, the test procedure is as follows.
１．試験条件の調整
１）コンプレッサエアー及びボンベガスを混合し、所定の酸素・窒素酸化物濃度の模擬ガスを調整した。
２）水分は、水を加熱気化させることにより模擬ガスに供給した。
３）某焼却施設の飛灰から抽出・調整した約２５００ｎｇ－ＴＥＱ／Ｌのダイオキシン類－メタノール溶液を、窒素気流下で電気管状炉に噴霧して加熱気化させ、模擬ガスに混合した。
４）バグフィルターを通過する模擬ガスの流量が所定の線速度（ＬＶ）となるようにエアーポンプの吸引量を調節した。過剰のガスは入口濃度の確認に用いた。
５）試験温度は、バグフィルター出口付近の温度が所定温度となるように恒温槽温度を調節した。
６）バグフィルター後で酸素濃度を連続で測定し、平均値を用いてダイオキシン類濃度（毒性換算値）を酸素濃度１２％に換算し評価した。 1. Adjustment of test conditions 1) Compressor air and cylinder gas were mixed to prepare a simulated gas having a predetermined oxygen / nitrogen oxide concentration.
2) Water was supplied to the simulated gas by heating and vaporizing the water.
3) About 2500 ng-TEQ / L of dioxins-methanol solution extracted and adjusted from the fly ash of the incineration facility was sprayed into an electric tube furnace under a nitrogen stream, heated and vaporized, and mixed with the simulated gas.
4) The suction amount of the air pump was adjusted so that the flow rate of the simulated gas passing through the bag filter was a predetermined linear velocity (LV). Excess gas was used to confirm the inlet concentration.
5) The test temperature was adjusted so that the temperature in the vicinity of the bag filter outlet was a predetermined temperature.
6) The oxygen concentration was continuously measured after the bag filter, and the dioxins concentration (toxicity conversion value) was converted to an oxygen concentration of 12% and evaluated using the average value.
１）コンプレッサエアー及びボンベガスを混合し、所定の酸素・窒素酸化物濃度の模擬ガスを調整した。
２）水分は、水を加熱気化させることにより模擬ガスに供給した。
３）某焼却施設の飛灰から抽出・調整した約２５００ｎｇ－ＴＥＱ／Ｌのダイオキシン類－メタノール溶液を、窒素気流下で電気管状炉に噴霧して加熱気化させ、模擬ガスに混合した。
４）バグフィルターを通過する模擬ガスの流量が所定の線速度（ＬＶ）となるようにエアーポンプの吸引量を調節した。過剰のガスは入口濃度の確認に用いた。
５）試験温度は、バグフィルター出口付近の温度が所定温度となるように恒温槽温度を調節した。
６）バグフィルター後で酸素濃度を連続で測定し、平均値を用いてダイオキシン類濃度（毒性換算値）を酸素濃度１２％に換算し評価した。 1. Adjustment of test conditions 1) Compressor air and cylinder gas were mixed to prepare a simulated gas having a predetermined oxygen / nitrogen oxide concentration.
2) Water was supplied to the simulated gas by heating and vaporizing the water.
3) About 2500 ng-TEQ / L of dioxins-methanol solution extracted and adjusted from the fly ash of the incineration facility was sprayed into an electric tube furnace under a nitrogen stream, heated and vaporized, and mixed with the simulated gas.
4) The suction amount of the air pump was adjusted so that the flow rate of the simulated gas passing through the bag filter was a predetermined linear velocity (LV). Excess gas was used to confirm the inlet concentration.
5) The test temperature was adjusted so that the temperature in the vicinity of the bag filter outlet was a predetermined temperature.
6) The oxygen concentration was continuously measured after the bag filter, and the dioxins concentration (toxicity conversion value) was converted to an oxygen concentration of 12% and evaluated using the average value.
２．ダイオキシン類のサンプリング
１）試験装置内へのダイオキシン類の吸着等によるダイオキシン類濃度の影響を考慮し、事前に１０時間以上模擬ガスの流通を行った。
２）ダイオキシンン類を採取する前に、所定温度および線速度（ＬＶ）で模擬ガスを５時間流通してバグフィルターの状態をできるだけ安定させた。
３）引き続き、ＪＩＳ Ｋ０３１１に準じてバグフィルターの上流側および下流側にてダイオキシン類を４時間採取し、分析に供した。
４）ダイオキシン類の測定中は酸素濃度を連続的に測定し、試験条件の監視を行った。
[表５]
[表６]
（ガス条件）
2. Sampling of dioxins 1) Considering the influence of dioxins concentration due to adsorption of dioxins into the test equipment, simulated gas was circulated for 10 hours or more in advance.
2) Before collecting dioxins, simulated gas was circulated for 5 hours at a predetermined temperature and linear velocity (LV) to stabilize the bag filter as much as possible.
3) Subsequently, dioxins were collected for 4 hours on the upstream and downstream sides of the bag filter in accordance with JIS K0311 and subjected to analysis.
4) During the measurement of dioxins, the oxygen concentration was continuously measured and the test conditions were monitored.
[Table 5]
[Table 6]
(Gas condition)
１）試験装置内へのダイオキシン類の吸着等によるダイオキシン類濃度の影響を考慮し、事前に１０時間以上模擬ガスの流通を行った。
２）ダイオキシンン類を採取する前に、所定温度および線速度（ＬＶ）で模擬ガスを５時間流通してバグフィルターの状態をできるだけ安定させた。
３）引き続き、ＪＩＳ Ｋ０３１１に準じてバグフィルターの上流側および下流側にてダイオキシン類を４時間採取し、分析に供した。
４）ダイオキシン類の測定中は酸素濃度を連続的に測定し、試験条件の監視を行った。
[表５]
[表６]
（ガス条件）
2) Before collecting dioxins, simulated gas was circulated for 5 hours at a predetermined temperature and linear velocity (LV) to stabilize the bag filter as much as possible.
3) Subsequently, dioxins were collected for 4 hours on the upstream and downstream sides of the bag filter in accordance with JIS K0311 and subjected to analysis.
4) During the measurement of dioxins, the oxygen concentration was continuously measured and the test conditions were monitored.
[Table 5]
[Table 6]
(Gas condition)
（試験結果）
試験結果を以下の表７に示す。
[表７]
(Test results)
The test results are shown in Table 7 below.
[Table 7]
試験結果を以下の表７に示す。
[表７]
The test results are shown in Table 7 below.
[Table 7]
上記試験結果から分かるように、供試体Ｅのダイオキシン類の除去率が６５％であるのに対して、供試体Ｃのダイオキシン類の除去率が６８％である結果が得られた。すなわち、供試体Ｃのダイオキシン類の除去率は、供試体Ｅのダイオキシン類の除去率を上回っていることが分かった。
As can be seen from the above test results, the removal rate of the dioxins of the specimen E was 65%, whereas the removal rate of the dioxins of the specimen C was 68%. That is, it was found that the dioxin removal rate of the specimen C exceeded the dioxin removal rate of the specimen E.
本発明の濾過布は、種々の排ガスを処理するためのバグフィルターに用いられる。例えば、焼却施設、製鉄所・製鋼所および金属精錬工場などから発生する排気ガス（特にダイオキシン類を含み得るガス）を処理するためのバグフィルターに本発明の濾過布を用いることができる。
なお、本発明は、以下の態様を包含する：
第１態様：
バグフィルターに用いられる濾過布であって、
排気ガス中のダイオキシン類物質を減じるための触媒としてマンガン酸化物が濾過布に担持されていることを特徴とする、バグフィルター用濾過布。
第２態様：
上記第１態様において、マンガン酸化物が二酸化マンガンであることを特徴とする、バグフィルター用濾過布。
第３態様：
上記第１態様において、濾過布の厚さが１．５ｍｍ～５．０ｍｍであることを特徴とする、バグフィルター用濾過布。
第４態様：
上記第１～第３態様のいずれかにおいて、二酸化マンガンの比表面積が２０ｍ２／ｇ～３００ｍ２／ｇであることを特徴とする、バグフィルター用濾過布。
第５態様：
上記第１～第４態様のいずれかにおいて、二酸化マンガンの平均粒径が０．５μｍ～１．５μｍであることを特徴とする、バグフィルター用濾過布。
第６態様：
上記第１～第５態様のいずれかにおいて、濾過布の単位面積当たりのマンガン酸化物の担持量が少なくとも２０ｇ／ｍ２であることを特徴とする、バグフィルター用濾過布。
第７態様：
上記第１～第６態様のいずれかにおいて、濾過布がフッ素系繊維を有して成ることを特徴とする、バグフィルター用濾過布。
第８態様：
上記第７態様において、フッ素系繊維がＰＴＦＥ繊維であることを特徴とする、バグフィルター用濾過布。
第９態様：
上記第７または第８態様において、濾過布がガラス繊維を更に有して成ることを特徴とする、バグフィルター用濾過布。
第１０態様：
上記第９態様において、ガラス繊維が３～１５μｍであることを特徴とする、バグフィルター用濾過布。
第１１態様：
上記第１～第１０態様において、濾過布が珪素化合物を有して成ることを特徴とする、バグフィルター用濾過布。
第１２態様：
上記第１～第１１態様において、マンガン酸化物が担持された濾過布の通気度が３～１５ｃｍ３／ｃｍ２／ｓｅｃであることを特徴とする、バグフィルター用濾過布。
第１３態様：
上記第１～第１２態様において、下記条件におけるダイオキシン類物質の毒性等価（ｎｇ－ＴＥＱ／Ｎｍ３）の低減率が４５％～７５％であることを特徴とする、バグフィルター用濾過布。
・排気ガス線速度：０．８～１．２ｍ／ｓｅｃ
・排気ガス温度：１００～２００℃
・濾過前の排気ガス中のダイオキシン濃度：１～５ｎｇ－ＴＥＱ／Ｎｍ３
・濾過面積：１２０～１６０ｃｍ２
第１４態様：
上記第１～第１３態様のいずれかのバグフィルター用濾過布を有して成るバグフィルター装置。 The filter cloth of the present invention is used for a bag filter for treating various exhaust gases. For example, the filter cloth of the present invention can be used for a bag filter for treating exhaust gas (especially gas that may contain dioxins) generated from incineration facilities, steelworks / steelworks, metal refining plants, and the like.
In addition, this invention includes the following aspects:
First aspect :
A filter cloth used for bag filters,
A filter cloth for a bag filter, characterized in that manganese oxide is supported on the filter cloth as a catalyst for reducing dioxin substances in exhaust gas.
Second aspect :
The filter cloth for bag filters according to the first aspect, wherein the manganese oxide is manganese dioxide.
Third aspect :
The filter cloth for bag filter according to the first aspect, wherein the thickness of the filter cloth is 1.5 mm to 5.0 mm.
Fourth aspect :
The filter cloth for a bag filter according to any one of the first to third aspects, wherein the specific surface area of manganese dioxide is 20 m 2 / g to 300 m 2 / g.
Fifth aspect :
The filter cloth for a bag filter according to any one of the first to fourth aspects, wherein an average particle diameter of manganese dioxide is 0.5 μm to 1.5 μm.
Sixth aspect :
The bag filter filter cloth according to any one of the first to fifth aspects, wherein the supported amount of manganese oxide per unit area of the filter cloth is at least 20 g / m 2 .
Seventh aspect :
The bag filter filter cloth according to any one of the first to sixth aspects, wherein the filter cloth includes a fluorine-based fiber.
Eighth aspect :
Said 7th aspect WHEREIN: The filter cloth for bag filters characterized by a fluorine-type fiber being a PTFE fiber.
Ninth aspect :
The filter cloth for bag filter according to the seventh or eighth aspect, wherein the filter cloth further comprises glass fibers.
Tenth aspect :
The filter cloth for bag filter according to the ninth aspect, wherein the glass fiber is 3 to 15 μm.
Eleventh aspect :
The filter cloth for a bag filter according to any one of the first to tenth aspects, wherein the filter cloth comprises a silicon compound.
12th aspect :
In the first to eleventh aspects, the filter cloth for bag filter is characterized in that the air permeability of the filter cloth carrying manganese oxide is 3 to 15 cm 3 / cm 2 / sec.
13th aspect :
The filter cloth for bag filter according to any one of the first to twelfth aspects, wherein the reduction rate of toxicity equivalent (ng-TEQ / Nm 3 ) of the dioxins substance under the following conditions is 45% to 75%.
・ Exhaust gas linear velocity: 0.8-1.2m / sec
・ Exhaust gas temperature: 100-200 ℃
・ Dioxin concentration in the exhaust gas before filtration: 1 to 5 ng-TEQ / Nm 3
-Filtration area: 120-160 cm 2
Fourteenth aspect :
A bag filter device comprising the bag filter cloth according to any one of the first to thirteenth aspects.
なお、本発明は、以下の態様を包含する：
第１態様：
バグフィルターに用いられる濾過布であって、
排気ガス中のダイオキシン類物質を減じるための触媒としてマンガン酸化物が濾過布に担持されていることを特徴とする、バグフィルター用濾過布。
第２態様：
上記第１態様において、マンガン酸化物が二酸化マンガンであることを特徴とする、バグフィルター用濾過布。
第３態様：
上記第１態様において、濾過布の厚さが１．５ｍｍ～５．０ｍｍであることを特徴とする、バグフィルター用濾過布。
第４態様：
上記第１～第３態様のいずれかにおいて、二酸化マンガンの比表面積が２０ｍ２／ｇ～３００ｍ２／ｇであることを特徴とする、バグフィルター用濾過布。
第５態様：
上記第１～第４態様のいずれかにおいて、二酸化マンガンの平均粒径が０．５μｍ～１．５μｍであることを特徴とする、バグフィルター用濾過布。
第６態様：
上記第１～第５態様のいずれかにおいて、濾過布の単位面積当たりのマンガン酸化物の担持量が少なくとも２０ｇ／ｍ２であることを特徴とする、バグフィルター用濾過布。
第７態様：
上記第１～第６態様のいずれかにおいて、濾過布がフッ素系繊維を有して成ることを特徴とする、バグフィルター用濾過布。
第８態様：
上記第７態様において、フッ素系繊維がＰＴＦＥ繊維であることを特徴とする、バグフィルター用濾過布。
第９態様：
上記第７または第８態様において、濾過布がガラス繊維を更に有して成ることを特徴とする、バグフィルター用濾過布。
第１０態様：
上記第９態様において、ガラス繊維が３～１５μｍであることを特徴とする、バグフィルター用濾過布。
第１１態様：
上記第１～第１０態様において、濾過布が珪素化合物を有して成ることを特徴とする、バグフィルター用濾過布。
第１２態様：
上記第１～第１１態様において、マンガン酸化物が担持された濾過布の通気度が３～１５ｃｍ３／ｃｍ２／ｓｅｃであることを特徴とする、バグフィルター用濾過布。
第１３態様：
上記第１～第１２態様において、下記条件におけるダイオキシン類物質の毒性等価（ｎｇ－ＴＥＱ／Ｎｍ３）の低減率が４５％～７５％であることを特徴とする、バグフィルター用濾過布。
・排気ガス線速度：０．８～１．２ｍ／ｓｅｃ
・排気ガス温度：１００～２００℃
・濾過前の排気ガス中のダイオキシン濃度：１～５ｎｇ－ＴＥＱ／Ｎｍ３
・濾過面積：１２０～１６０ｃｍ２
第１４態様：
上記第１～第１３態様のいずれかのバグフィルター用濾過布を有して成るバグフィルター装置。 The filter cloth of the present invention is used for a bag filter for treating various exhaust gases. For example, the filter cloth of the present invention can be used for a bag filter for treating exhaust gas (especially gas that may contain dioxins) generated from incineration facilities, steelworks / steelworks, metal refining plants, and the like.
In addition, this invention includes the following aspects:
First aspect :
A filter cloth used for bag filters,
A filter cloth for a bag filter, characterized in that manganese oxide is supported on the filter cloth as a catalyst for reducing dioxin substances in exhaust gas.
Second aspect :
The filter cloth for bag filters according to the first aspect, wherein the manganese oxide is manganese dioxide.
Third aspect :
The filter cloth for bag filter according to the first aspect, wherein the thickness of the filter cloth is 1.5 mm to 5.0 mm.
Fourth aspect :
The filter cloth for a bag filter according to any one of the first to third aspects, wherein the specific surface area of manganese dioxide is 20 m 2 / g to 300 m 2 / g.
Fifth aspect :
The filter cloth for a bag filter according to any one of the first to fourth aspects, wherein an average particle diameter of manganese dioxide is 0.5 μm to 1.5 μm.
Sixth aspect :
The bag filter filter cloth according to any one of the first to fifth aspects, wherein the supported amount of manganese oxide per unit area of the filter cloth is at least 20 g / m 2 .
Seventh aspect :
The bag filter filter cloth according to any one of the first to sixth aspects, wherein the filter cloth includes a fluorine-based fiber.
Eighth aspect :
Said 7th aspect WHEREIN: The filter cloth for bag filters characterized by a fluorine-type fiber being a PTFE fiber.
Ninth aspect :
The filter cloth for bag filter according to the seventh or eighth aspect, wherein the filter cloth further comprises glass fibers.
Tenth aspect :
The filter cloth for bag filter according to the ninth aspect, wherein the glass fiber is 3 to 15 μm.
Eleventh aspect :
The filter cloth for a bag filter according to any one of the first to tenth aspects, wherein the filter cloth comprises a silicon compound.
12th aspect :
In the first to eleventh aspects, the filter cloth for bag filter is characterized in that the air permeability of the filter cloth carrying manganese oxide is 3 to 15 cm 3 / cm 2 / sec.
13th aspect :
The filter cloth for bag filter according to any one of the first to twelfth aspects, wherein the reduction rate of toxicity equivalent (ng-TEQ / Nm 3 ) of the dioxins substance under the following conditions is 45% to 75%.
・ Exhaust gas linear velocity: 0.8-1.2m / sec
・ Exhaust gas temperature: 100-200 ℃
・ Dioxin concentration in the exhaust gas before filtration: 1 to 5 ng-TEQ / Nm 3
-Filtration area: 120-160 cm 2
Fourteenth aspect :
A bag filter device comprising the bag filter cloth according to any one of the first to thirteenth aspects.
本出願は、日本国特許出願第２０１３－３９２８１号（出願日：２０１３年２月２８日、発明の名称「バグフィルター用濾過布およびそれを用いたバグフィルター装置」）に基づくパリ条約上の優先権を主張する。当該出願に開示された内容は全て、この引用により、本明細書に含まれるとする。
This application is prioritized under the Paris Convention based on Japanese Patent Application No. 2013-39281 (filing date: February 28, 2013, title of the invention "filter cloth for bag filter and bag filter apparatus using the same"). Insist on the right. All the contents disclosed in the application are incorporated herein by this reference.
１０ 本発明のバグフィルター用濾過布
２０ リテーナー具
３０ ハウジング
３６ ロータリーバルブ
３８ ホッパー部
１００ 本発明のバグフィルター装置 DESCRIPTION OFSYMBOLS 10 Filter cloth for bag filters of this invention 20 Retainer tool 30 Housing 36 Rotary valve 38 Hopper part 100 Bag filter apparatus of this invention
２０ リテーナー具
３０ ハウジング
３６ ロータリーバルブ
３８ ホッパー部
１００ 本発明のバグフィルター装置 DESCRIPTION OF
Claims (13)
- バグフィルターに用いられる濾過布であって、
排気ガス中のダイオキシン類物質を減じるための触媒が濾過布に担持され、該触媒が二酸化マンガンから成ることを特徴とする、バグフィルター用濾過布。 A filter cloth used for bag filters,
A filter cloth for a bag filter, wherein a catalyst for reducing dioxin substances in exhaust gas is supported on the filter cloth, and the catalyst is made of manganese dioxide. - 前記濾過布の厚さが１．５ｍｍ～５．０ｍｍであることを特徴とする、請求項１に記載のバグフィルター用濾過布。 The filter cloth for bag filter according to claim 1, wherein the thickness of the filter cloth is 1.5 mm to 5.0 mm.
- 前記二酸化マンガンの比表面積が２０ｍ２／ｇ～３００ｍ２／ｇであることを特徴とする、請求項１に記載のバグフィルター用濾過布。 The filter cloth for bag filter according to claim 1, wherein the manganese dioxide has a specific surface area of 20 m 2 / g to 300 m 2 / g.
- 前記二酸化マンガンの平均粒径が０．５μｍ～１．５μｍであることを特徴とする、請求項１に記載のバグフィルター用濾過布。 The filter cloth for bag filter according to claim 1, wherein an average particle diameter of the manganese dioxide is 0.5 µm to 1.5 µm.
- 前記濾過布の単位面積当たりの前記二酸化マンガンの担持量が少なくとも２０ｇ／ｍ２であることを特徴とする、請求項１に記載のバグフィルター用濾過布。 The supported amount of the manganese dioxide per unit area of filter cloth is characterized in that at least 20 g / m 2, a bag filter for filtration cloth according to claim 1.
- 前記濾過布がフッ素系繊維を有して成ることを特徴とする、請求項１に記載のバグフィルター用濾過布。 The filter cloth for bag filter according to claim 1, wherein the filter cloth includes a fluorine-based fiber.
- 前記フッ素系繊維がＰＴＦＥ繊維であることを特徴とする、請求項６に記載のバグフィルター用濾過布。 The filter cloth for bag filter according to claim 6, wherein the fluorine-based fiber is PTFE fiber.
- 前記濾過布がガラス繊維を更に有して成ることを特徴とする、請求項６に記載のバグフィルター用濾過布。 The filter cloth for bag filter according to claim 6, wherein the filter cloth further comprises glass fibers.
- 前記ガラス繊維が３～１５μｍであることを特徴とする、請求項８に記載のバグフィルター用濾過布。 9. The filter cloth for bag filter according to claim 8, wherein the glass fiber is 3 to 15 μm.
- 前記濾過布が珪素化合物を有して成ることを特徴とする、請求項１に記載のバグフィルター用濾過布。 The filter cloth for bag filter according to claim 1, wherein the filter cloth comprises a silicon compound.
- 前記二酸化マンガンが担持された前記濾過布の通気度が３～１５ｃｍ３／ｃｍ２／ｓｅｃであることを特徴とする、請求項１に記載のバグフィルター用濾過布。 The filter cloth for bag filter according to claim 1, wherein the air permeability of the filter cloth carrying manganese dioxide is 3 to 15 cm 3 / cm 2 / sec.
- 下記条件におけるダイオキシン類物質の毒性等価（ｎｇ－ＴＥＱ／Ｎｍ３）の低減率が４５％～７５％であることを特徴とする、請求項１に記載のバグフィルター用濾過布。
・排気ガス線速度：０．８～１．２ｍ／ｓｅｃ
・排気ガス温度：１００～２００℃
・濾過前の排気ガス中のダイオキシン濃度：１～５ｎｇ－ＴＥＱ／Ｎｍ３
・濾過面積：１２０～１６０ｃｍ２ The filter cloth for a bag filter according to claim 1, wherein the reduction rate of toxicity equivalent (ng-TEQ / Nm 3 ) of dioxins is 45% to 75% under the following conditions.
・ Exhaust gas linear velocity: 0.8-1.2m / sec
・ Exhaust gas temperature: 100-200 ℃
・ Dioxin concentration in the exhaust gas before filtration: 1 to 5 ng-TEQ / Nm 3
-Filtration area: 120-160 cm 2 - 請求項１に記載のバグフィルター用濾過布を有して成るバグフィルター装置。 A bag filter device comprising the filter cloth for bag filter according to claim 1.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013039281A JP5496381B1 (en) | 2013-02-28 | 2013-02-28 | Bag filter filter cloth and bag filter device using the same |
| JP2013-039281 | 2013-02-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2014133016A1 true WO2014133016A1 (en) | 2014-09-04 |
Family
ID=50941638
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2014/054717 WO2014133016A1 (en) | 2013-02-28 | 2014-02-26 | Filter cloth for bag filter, and bag filter device including same |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5496381B1 (en) |
| WO (1) | WO2014133016A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020245243A1 (en) * | 2019-06-07 | 2020-12-10 | Haldor Topsøe A/S | A method for ozone-assisted dioxin removal |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101879027B1 (en) * | 2015-12-24 | 2018-07-16 | 주식회사 포스코 | Method of Removing Compositive Malodor of Cokes Oven Flue Gas and Bag Filter Dust Collector thereof |
| US20200038791A1 (en) | 2017-03-24 | 2020-02-06 | Toray Industries, Inc. | Filter medium and bag filter |
| JP6694936B1 (en) | 2018-11-12 | 2020-05-20 | 三菱重工業株式会社 | Method for manufacturing gas purification filter |
| CN111778732A (en) * | 2020-07-16 | 2020-10-16 | 抚顺天成环保科技有限公司 | High-temperature-resistant glass fiber woven fabric and preparation method thereof |
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| JP2001038209A (en) * | 1999-07-29 | 2001-02-13 | Kobe Steel Ltd | Catalyst for removing organohologen compound |
| JP2003340219A (en) * | 2002-05-30 | 2003-12-02 | Jfe Engineering Kk | Bag filter for removing organochlorine compound |
| JP2004195349A (en) * | 2002-12-18 | 2004-07-15 | Mitsui Eng & Shipbuild Co Ltd | Toxic substance decomposing/removing filter and bag filter |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3448246B2 (en) * | 1999-10-12 | 2003-09-22 | 三菱重工業株式会社 | Bag filter and exhaust gas purification method |
| JP3745768B2 (en) * | 2003-05-27 | 2006-02-15 | 三井造船株式会社 | Filter material manufacturing method, filter material, bag filter, and exhaust gas treatment method |
| JP2005287759A (en) * | 2004-03-31 | 2005-10-20 | Kurita Water Ind Ltd | Dioxin reducing agent and dioxin reducing method |
| JP4582475B2 (en) * | 2004-10-26 | 2010-11-17 | 日本フエルト株式会社 | Felt manufacturing method |
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2013
- 2013-02-28 JP JP2013039281A patent/JP5496381B1/en not_active Expired - Fee Related
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001038209A (en) * | 1999-07-29 | 2001-02-13 | Kobe Steel Ltd | Catalyst for removing organohologen compound |
| JP2003340219A (en) * | 2002-05-30 | 2003-12-02 | Jfe Engineering Kk | Bag filter for removing organochlorine compound |
| JP2004195349A (en) * | 2002-12-18 | 2004-07-15 | Mitsui Eng & Shipbuild Co Ltd | Toxic substance decomposing/removing filter and bag filter |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020245243A1 (en) * | 2019-06-07 | 2020-12-10 | Haldor Topsøe A/S | A method for ozone-assisted dioxin removal |
| CN113905805A (en) * | 2019-06-07 | 2022-01-07 | 托普索公司 | Ozone-assisted dioxin removal method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2014166614A (en) | 2014-09-11 |
| JP5496381B1 (en) | 2014-05-21 |
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