CN106132505B - 滤袋组件 - Google Patents
滤袋组件 Download PDFInfo
- Publication number
- CN106132505B CN106132505B CN201580015291.4A CN201580015291A CN106132505B CN 106132505 B CN106132505 B CN 106132505B CN 201580015291 A CN201580015291 A CN 201580015291A CN 106132505 B CN106132505 B CN 106132505B
- Authority
- CN
- China
- Prior art keywords
- filter
- filter bag
- bag
- bay assembly
- tubular filter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000011149 active material Substances 0.000 claims abstract description 24
- 238000004140 cleaning Methods 0.000 claims abstract description 12
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Chemical compound [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 claims description 34
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 30
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 26
- 239000000463 material Substances 0.000 claims description 14
- 239000004408 titanium dioxide Substances 0.000 claims description 13
- 229910052763 palladium Inorganic materials 0.000 claims description 9
- 230000000694 effects Effects 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 230000003197 catalytic effect Effects 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 229920006254 polymer film Polymers 0.000 claims description 4
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- -1 polytetrafluoroethylene Polymers 0.000 claims description 2
- 238000000429 assembly Methods 0.000 abstract description 7
- 230000000712 assembly Effects 0.000 abstract description 7
- 239000003054 catalyst Substances 0.000 description 37
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 15
- 239000010936 titanium Substances 0.000 description 14
- 239000004744 fabric Substances 0.000 description 13
- GNTDGMZSJNCJKK-UHFFFAOYSA-N divanadium pentaoxide Chemical compound O=[V](=O)O[V](=O)=O GNTDGMZSJNCJKK-UHFFFAOYSA-N 0.000 description 12
- 239000000428 dust Substances 0.000 description 12
- 239000012855 volatile organic compound Substances 0.000 description 12
- 238000007254 oxidation reaction Methods 0.000 description 11
- 239000003344 environmental pollutant Substances 0.000 description 7
- 230000003647 oxidation Effects 0.000 description 7
- 239000013618 particulate matter Substances 0.000 description 7
- 231100000719 pollutant Toxicity 0.000 description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- 239000000835 fiber Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- XHCLAFWTIXFWPH-UHFFFAOYSA-N [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] XHCLAFWTIXFWPH-UHFFFAOYSA-N 0.000 description 4
- 239000004568 cement Substances 0.000 description 4
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 229910001935 vanadium oxide Inorganic materials 0.000 description 4
- 229910021541 Vanadium(III) oxide Inorganic materials 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000012065 filter cake Substances 0.000 description 3
- 229910000510 noble metal Inorganic materials 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- KVGZZAHHUNAVKZ-UHFFFAOYSA-N 1,4-Dioxin Chemical compound O1C=COC=C1 KVGZZAHHUNAVKZ-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 229910021542 Vanadium(IV) oxide Inorganic materials 0.000 description 2
- QUEDYRXQWSDKKG-UHFFFAOYSA-M [O-2].[O-2].[V+5].[OH-] Chemical compound [O-2].[O-2].[V+5].[OH-] QUEDYRXQWSDKKG-UHFFFAOYSA-M 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 150000002240 furans Chemical class 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000004753 textile Substances 0.000 description 2
- GRUMUEUJTSXQOI-UHFFFAOYSA-N vanadium dioxide Chemical compound O=[V]=O GRUMUEUJTSXQOI-UHFFFAOYSA-N 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000010718 Oxidation Activity Effects 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009954 braiding Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 230000002779 inactivation Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000012784 inorganic fiber Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- KFAFTZQGYMGWLU-UHFFFAOYSA-N oxo(oxovanadiooxy)vanadium Chemical compound O=[V]O[V]=O KFAFTZQGYMGWLU-UHFFFAOYSA-N 0.000 description 1
- DUSYNUCUMASASA-UHFFFAOYSA-N oxygen(2-);vanadium(4+) Chemical compound [O-2].[O-2].[V+4] DUSYNUCUMASASA-UHFFFAOYSA-N 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
- IBYSTTGVDIFUAY-UHFFFAOYSA-N vanadium monoxide Chemical compound [V]=O IBYSTTGVDIFUAY-UHFFFAOYSA-N 0.000 description 1
- 238000004056 waste incineration Methods 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Classifications
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Health & Medical Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Catalysts (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Filtering Materials (AREA)
- Chimneys And Flues (AREA)
Abstract
本发明涉及用于清洁工艺气体的滤袋组件,其包括外部管状滤袋和一个或多个独立布置在外部管状滤袋内的内部管状滤袋,并且所述一个或多个内部管状滤袋还独立地布置在彼此之内,一个或多个内部管状滤袋和外部管状滤袋具有开口端和封闭端,并且至少一个内部管状滤袋和/或外部管状滤袋设置有催化活性材料。
Description
本发明涉及滤袋组件,其包括同轴布置在外部滤袋内的多个织物滤袋。更具体地说,本发明提供了一种过滤器组件,其包括外部管状滤袋和在外部滤袋内的一个或多个内部管状滤袋,该一个或多个内部管状滤袋独立地安装在外部滤袋内和彼此内部,以去除工艺气体中的灰尘和颗粒物质。滤袋中的至少一个是催化的滤袋,以去除工艺气体中含有的有害组分。滤袋组件特别可用于清洁来自涉及燃烧的工业过程如矿物、水泥、垃圾焚烧的生产或来自燃煤锅炉的工艺气体或原料气体。
滤袋形式的织物过滤器广泛用于许多工业中以从工艺气体除去颗粒物质。其是可用的最有效的集尘器类型之一,并且对于颗粒物可达到99%以上的收集效率。袋可以从各种编织或毡材料或其混合物制成,包括天然纤维、合成纤维或其它纤维(如玻璃、陶瓷或金属纤维)。
织物过滤器高的颗粒物去除效率部分源于在滤袋表面上形成的灰尘饼,并且部分源于滤袋的组成和生产质量以及织物过滤器结构本身的质量。织物提供了表面,在其上灰尘颗粒物被收集。由于构成滤袋的纤维组成,其通常在低于250℃的温度下操作。
含有颗粒的工艺气体经常含有多种污染物,例如NOx、挥发性有机化合物(VOC)、SO2、CO、Hg、NH3、二噁英和呋喃,其浓度取决于当地法规必须降低。为了这个目的,几种常规方法是可用的。在所有情况下,必须安装和运行在织物滤袋上/下游的额外设备。
气态污染物如NOx、VOC、二噁英和呋喃的消减可通过与催化剂接触而有效地进行。具体而言,基于钒氧化物的催化剂是通常使用的催化剂,以在静止和汽车应用中通过用NH3选择性还原NOx来还原NOx。
本发明总的目的是将灰尘和颗粒物质的机械去除与气态污染物的催化去除合并,这些污染物通过织物滤袋组件产品包含在工业过程中。
因此,本发明提供了用于清洁工艺气体的滤袋组件,其包括外部管状滤袋和一个或多个独立地布置在所述外部管状滤袋内的内部管状滤袋,并且所述一个或多个内部管状滤袋还独立地布置在彼此之内,所述一个或多个内部管状滤袋和所述外部管状滤袋具有开口端和封闭端,并且至少一个内部管状滤袋和/或外部管状滤袋提供有催化活性材料。
本发明的滤袋组件的进一步细节可见于以下对于本发明、附图和从属权利要求的描述中。
术语“外袋”,如本文之前和在以下说明书和所附权利要求中所用,是指工艺气体首先在其中通过的滤袋;术语“内袋”是指工艺气体在通过外袋之后随后在其中通过的滤袋。
在根据本发明的滤袋组件的不同滤袋上的催化活性材料可选自不同的催化剂组合物,从而使得在通过过滤器组件的工艺气体的流动方向中的上游滤袋中的催化活性材料能够有效降低工艺气体中第一气态组分的含量,所述第一组分可降低在工艺气体的流动方向中的下游滤袋的催化活性材料的催化活性,并且所述下游活性滤袋可有效降低工艺气体中第二气体组分的含量。
在一个或多个管状内部滤袋的至少一个中和/或在外部管状滤袋中的催化活性材料提供有包含钒氧化物和二氧化钛的催化剂组合物。
术语“钒氧化物(a vanadium oxide或vanadium oxide)”是指:
钒(II)氧化物(一氧化钒),VO;或者
钒(III)氧化物(三氧化二钒,vanadium sesquioxide或vanadium trioxide),V2O3;或者
钒(IV)氧化物(二氧化钒),VO2;或者
钒(V)氧化物(五氧化二钒),V2O5。
优选地,用于本发明的钒氧化物包括钒(V)氧化物(五氧化二钒),V2O5或由其组成。
术语“钛氧化物(titania)”指二氧化钛(TiO2)。
催化活性材料可进一步包括金属和/或氧化物形式的钯。
这些催化剂可有效用于烃(VOC)和一氧化碳的去除以及通过NH3经由SCR反应去除NOx二者中。
这些催化剂基于以下原因是优选的。该Pd/V/Ti催化剂具有i)双重功能(去除NOx和去除VOC,挥发性有机化合物);ii)S-耐受性;和iii)与其他催化剂组合物(如基于Pt的催化剂)相比更低的SO2氧化活性。
已知含Pd的催化剂的氧化活性由于存在几个ppm的NH3而降低。在外袋或外袋和第一内袋中使用V/Ti催化剂降低或消除了NH3的含量,其过量地存在于来自水泥厂的NOx的SCR反应的工艺气体中,而VOC被氧化成CO和CO2的混合物。也已知的是,除了是NOx的NH3-SCR的活性催化剂之外,钒氧化物也是活性的氧化催化剂。与贵金属催化剂如Pd催化剂相比,钒氧化物催化剂在CO2的形成中选择性较差,一些量的CO在氧化反应期间产生。CO不能通过与钒氧化物催化剂接触而以可行的反应速率被氧化为CO2,而是要求贵金属催化剂如钯的存在。因此,如果气体中存在NH3,则其优选用V/Ti催化剂催化外部滤袋,并且如果CO存在于工艺气体中或通过在外袋中的VOC的催化氧化而形成,至少一个内袋用Pd/V/Ti催化剂催化。
作为一个例子,当含有氨和VOC的工艺气体通过装有基于钒氧化物的催化剂的滤袋组件的外袋时,在其与内袋接触之前,氨通过NOx的NH3-SCR从气体中去除。在通过外袋期间由于VOC的不完全氧化,在直接接触V/Ti催化剂之后形成一些量的CO。然后通过使内袋装载Pd/V/Ti催化剂,CO和剩余量的VOC被有效氧化为CO2。以这种方式,可实现内部滤袋中昂贵贵金属的最少装载。
此外,当采用Pd/V/Ti催化剂时,催化剂滤袋是耐硫的,即不经受硫失活。Pd/V/Ti催化剂额外降低了通过SO2的氧化而形成的SO3的量。如果H2S也存在于进入滤袋组件的工艺气体中,其也将在V/Ti和Pd/V/Ti催化剂二者上被氧化为SO2。
因此,在本发明的一个具体实施方案中,在外部管状滤袋中的催化活性材料包含钒氧化物和二氧化钛。
在本发明的另一个具体的实施方案中,一个或多个内部管状滤袋中的至少一个包含钒氧化物和二氧化钛以及金属和/或氧化物形式的钯。
催化活性材料通过用含有二氧化钛微粒形式的催化活性材料和该活性材料的前体即钒和钯的盐的浆料浸渍而施加至在材料纤维上的织物材料中的滤袋上。然后浸渍可通过使滤袋浸蘸在浆料中或使溶液喷雾在滤袋上来进行。由于滤袋织物潜在的疏水性,可将表面活性剂添加至浆料中以促进液体至织物材料中的渗透。一旦浸渍了,随后使袋干燥和加热至所需温度,以分解所有的前体和使催化剂活化。
或者,可在浸渍步骤之前以粉末形式制备、干燥和活化该催化剂。然后,可用活性催化剂粉末制备浆料,并如上所述浸渍滤袋。通过后者的方法,浸渍的滤袋在使用之前仅需要干燥。
在本发明的一个实施方案中,滤袋组件包括至少第一和第二内部管状滤袋。
优选在外部管状滤袋中的催化活性材料包括钒氧化物和二氧化钛,并且在第一内部管状滤袋中的催化活性材料包括钒氧化物和二氧化钛。
进一步优选的是在外部管状滤袋中的催化活性材料包括钒氧化物和二氧化钛,并且在第二内部滤袋中的催化活性材料包括钒氧化物、二氧化钛和金属和/或氧化形式的钯。
管状外部滤袋和随后一系列(subsequent series)的内部滤袋是由适合于不同工艺条件的材料的多孔过滤介质制成。袋材料缝合或焊接成管状滤袋。
优选地,外部管状滤袋和一个或多个内部管状滤袋是由编织织物(woven fabric)或单独的有机或无机纤维的针轧毛毡(needle felt)制成。
催化活性材料负载在编织织物或针轧毛毡上。
在例如水泥窑的应用中最常用的滤袋材料是玻璃纤维材料,任选地在外袋朝向工艺气体的外侧具有薄的聚合物膜。
聚合物膜可以由聚四氟乙烯制成。
膜保护催化剂免受颗粒物中含有的催化剂毒物的污染。
为了便于使滤袋安装在管板(tube sheet)中,外部管状滤袋和每个内部管状滤袋均设置有顶部套箍(top cuff),其在袋的开口端处形成中空套管(hollow casing)并保持一个或多个不锈钢带卡扣(snap band),在其上附着线体(a string)。顶部套箍和卡扣带以及线体一起形成围绕滤袋的开口端的密封带(a sealing band),如附图的图1所示。密封带的尺寸应当设计,以适合卡扣带的整个周长。可在玻璃袋上布置多个密封带。
外部管状滤袋的顶部套箍保持上部密封带和任选的额外的下部密封带。
上部密封带布置在管板上侧上方的袋的开口端处的外部管状滤袋上,而任选的下部密封带上则在管板下方。
当外部管状滤袋安装在管板中时,密封带确保袋被牢固安装在管板上并且在过滤器的污浊侧和清洁侧之间提供有效密封。
在根据本发明的管状滤袋组件中,具有其直径比外袋的直径更小的第一内部管状袋独立布置在外袋内侧。
具有比先前管状袋更小直径的下一个内部管状滤袋可然后独立布置在先前的内袋内。任选地,两个以上的内袋可以与第一和第二内部管状袋相同的方式布置在根据本发明的滤袋组件中。
每个内袋仅设置一个密封带。
滤袋一个一个地装配在滤袋组件中。外袋卡入管板中,而第一内袋通过使其密封带卡至外袋的上部密封带的顶部而固定,并且第二内袋通过将其密封带卡至第一内袋的密封带上而固定。任选地,以相同方式安装其他内袋。因此,根据本发明的滤袋组件设计的优点尤其在于,所有的管状滤袋都可以各自容易地移除和替换。因此,通过该布置,可只替换表现欠佳的滤袋。此外,即使要替换所有滤袋,也优化了再利用和再循环,因为在特定袋上的材料能够各自以最佳的方式被处理。
当操作根据本发明的管状滤袋组件时,具有高的粉尘负荷的原工艺气体进入容纳所述多个管状过滤器组件的滤袋套管的入口歧管。气体通过气体分配筛网装置,并在滤袋区域的过滤器组件之间分配。因为在这个区域中的低的气体速度,在灰尘到达管状过滤器组件的表面之前,部分灰尘掉下来。在管状滤袋区域的入口,气体路径被扩展,气体速度降低,部分灰尘掉至位于滤袋区域下方的底料斗。
灰尘沉积在朝向污浊工艺气体流袋的外部管状过滤器的外表面,并形成滤饼,同时气体通过滤袋组件的外袋和内袋进入滤袋区域附近的清洁空气区域。使空气通过滤袋的压差由位于织物过滤器下游的ID-扇产生。
外部滤袋上的膜增强了形成于朝向工艺气体的外部滤袋侧上的滤饼的形成。颗粒不能渗透外部滤袋的织物/纤维,因而外袋和/或内袋上负载的催化剂被有效保护,避免了工艺气体中含有的颗粒中存在的潜在催化剂毒物的影响。
在如水泥生产工艺中,进入过滤器结构的工艺气体可以含有不同类型的污染物,包括VOC、NOx、NH3和SO2。通过根据本发明的具有至少两个或更多个在彼此内独立地布置的管状滤袋的滤袋组件,每个滤袋均能够负载不同的催化剂,其使得可以有效地催化地去除在不同组件的滤袋中的不同污染物,每一个滤袋用活性催化剂来催化以去除特定污染物。
跨滤袋的压降将随着过滤器组件的外侧上的滤饼量的增加而增大。因此,灰尘必须定期从袋上去除。
该清洁操作通过不同行的以预设顺序清洁的滤袋来顺序进行。该顺序通过过滤器控制器自动控制。该清洁根据原料气体歧管和清洁气体岐管之间的压差进行,或者以特定频率(如基于小时)周期性地强迫性地进行。
滤袋通过以与向上通过袋的清洁气体流相反方向的向下通过袋的脉冲注入压缩空气来清洁(脉冲清洁)。袋被充气,以使灰尘层从袋释放并落入底部料斗中,灰尘层在底部料斗中通过灰尘排出系统被除去。清洁气体通过袋,并在释放到大气中之前进入清洁空气腔室。
清洗过程对于滤袋上的催化剂负载没有影响,因为在清洁期间,流动通过滤袋的清洁空气是非常有限的。
为了支持滤袋,将由圆的钢丝或棒形成的笼安装在最里面的管状滤袋的内侧。笼被设计为均匀支持滤袋的织物并且限制滤袋的弯曲和磨损,但允许在清洁顺序期间的最佳粉尘释放。
笼可以是单件或多件结构的形式,其包括多个垂直的沿周长均匀间隔开的丝(线体)。垂直丝优选连接到沿笼的长度以适当间隔布置的水平支撑环上。
文氏管可以安装在笼的顶部。文氏管可安装在笼子内或位于笼的顶部。设计文氏管以增强滤袋的脉冲清洁效果并节省清洁空气的消耗。文氏管的底部部分形成为垫圈(base ring),其围绕所有安装在管板中和在每个滤袋上密封带并保护密封带。该垫圈位于管板上并承担笼的重量。
参照附图更详细地描述本发明,其中
图1示出了如上所述的根据本发明的实施方案的滤袋顶部上的密封带的布置;和
图2示出了根据本发明的一个特定特征的滤袋组件的顶部的过滤器的横截面。
现在参照图2,根据本发明的一个具体实施方案的滤袋组件2包括外部管状滤袋4,同轴布置在外部滤袋4内的第一内部管状滤袋6,以及同轴布置在第一内部管状滤袋6内的第二内部滤袋8。每个滤袋分别设置有顶部套箍4a、6a和8a。每个顶部套箍4a、6a和8a分别围绕钢带卡扣10、12和14。外部滤袋4通过上部密封带18b,任选额外通过下部密封带18a来安装并悬挂在管板16中。第一内部滤袋6被同轴布置在外部滤袋4内,并且通过滤袋6的密封带20和外部滤袋4中的上部密封带18b悬挂在外部滤袋4的开口端。第二内部滤袋8被同轴布置在第一内部滤袋6内,并且通过内部滤袋8的密封带22悬挂在第一内部滤袋6的顶部。密封带被垫圈24围绕,以保护密封带。垫圈24位于管板16上并且同时用作笼26的锚。笼26支撑第二内部滤袋8。笼26由多个垂直的钢丝或棒28组成,其确保袋8在操作和脉冲清洁期间不发生倒塌和磨损。脉冲清洁通过安装在垫圈24顶部的文氏管30来增强。
实施例1
以下实施例说明了在甲苯氧化中用V/Ti催化剂浸渍的单一一个袋可获得的性能。入口气体含40ppm的干燥甲苯,19体积%的O2和8体积%的H2O。
在V/Ti浸渍袋上的甲苯氧化
温度,℃ | 迎面风速,m/min | 甲苯转化率,% | 出口CO,ppm,湿 |
220 | 1.28 | 59 | 17 |
240 | 1.34 | 85 | 35 |
如从上表可知,85%的甲苯在240℃被氧化。在相同温度下的CO排放等于35ppm,湿。
实施例2
下面的例子说明了用Pd/V/Ti催化剂浸渍的一个滤袋的CO氧化性能。该测试用含有约150ppm,湿CO、19%的O2和8%的H2O的气体进行。
在Pd/V/Ti浸渍袋上的CO氧化
在240℃,97%的CO被氧化成CO2。
通过结合实施例1和实施例2所报告的滤袋的性能,可得出以下结论,由实施例1和实施例2的两个袋组成的滤袋组件,仅排放了1ppm的CO。
Claims (20)
1.一种用于清洁工艺气体的滤袋组件,其包括外部管状滤袋和一个或多个独立布置在所述外部管状滤袋内的内部管状滤袋,并且所述一个或多个内部管状滤袋还独立地布置在彼此之内,所述一个或多个内部管状滤袋和所述外部管状滤袋具有开口端和封闭端,并且所述一个或多个内部管状滤袋中的至少之一和所述外部管状滤袋包含催化活性材料,其中所述一个或多个内部管状滤袋中的第一个通过在所述外部管状滤袋的开口端处的密封带和第一内部管状滤袋的开口端处的密封带布置在所述外部管状滤袋内,其中在所述外部管状滤袋中的催化活性材料包含钒氧化物和二氧化钛,且在所述一个或多个内部滤袋中的至少之一中的催化活性材料包含钒氧化物、二氧化钛和金属和/或氧化物形式的钯。
2.如权利要求1所述的滤袋组件,其中在通过滤袋组件的工艺气体的流动方向中的一个或多个上游滤袋中的催化活性材料能够有效降低所述工艺气体中第一组分的含量,所述第一组分能够降低在所述工艺气体的流动方向中的一个或多个下游滤袋的催化活性材料的催化活性,并且所述下游活性滤袋能够有效降低所述工艺气体中第二组分的含量。
3.如权利要求2所述的滤袋组件,其中在所述一个或多个上游滤袋中的催化活性材料包含钒氧化物和二氧化钛。
4.如权利要求2或3所述的滤袋组件,其中在所述一个或多个下游滤袋中的催化活性材料包含钒氧化物、二氧化钛和金属和/或氧化物形式的钯。
5.如权利要求1所述的滤袋组件,其中在所述一个或多个管状内部滤袋中的至少之一和所述外部管状滤袋中的催化活性材料由包含钒氧化物和二氧化钛的催化剂组合物提供。
6.如权利要求5所述的滤袋组件,其中所述催化活性材料还包含金属和/或氧化物形式的钯。
7.如权利要求1所述的滤袋组件,其至少包括第一和第二内部管状滤袋。
8.如权利要求1所述的滤袋组件,其中所述催化活性材料负载在各个滤袋各自的有机或无机纤维上。
9.如权利要求1所述的滤袋组件,其中所述外部管状滤袋用聚合物膜涂覆在所述外部管状滤袋朝向工艺气体的外侧。
10.如权利要求9所述的滤袋组件,其中所述聚合物膜由聚四氟乙烯制成。
11.如权利要求1所述的滤袋组件,其中所述外部管状滤袋和所述一个或多个内部管状滤袋设置有顶部套箍,其在开口端处形成中空套管并保持一个或多个钢带卡扣,在各个所述钢带卡扣上附着线体,其与所述顶部套箍和卡扣带一起形成密封带。
12.如权利要求11所述的滤袋组件,其中所述外部管状滤袋设置有上部密封带。
13.如权利要求12所述的滤袋组件,其中所述外部管状滤袋还设置有下部密封带。
14.如权利要求12所述的滤袋组件,其中所述外部管状滤袋通过所述上部密封带使滤袋安装在管板中。
15.如权利要求13所述的滤袋组件,其中所述外部管状滤袋通过上部和下部密封使滤袋安装在管板中。
16.如权利要求11所述的滤袋组件,其中所述一个或多个内部管状滤袋中的第二个通过在第二内部管状滤袋的开口端处的密封带布置在所述第一内部管状滤袋内。
17.如权利要求1所述的滤袋组件,其中所述一个或多个内部管状滤袋的最里面的一个通过在该最里面的内部管状滤袋的内侧布置的笼来支持。
18.如权利要求17所述的滤袋组件,其中文氏管固定至在所述最里面的内部滤袋的开口端处的笼的顶部。
19.如权利要求18所述的滤袋组件,其中所述文氏管的底部部分通过垫圈固定至所述笼。
20.如权利要求19所述的滤袋组件,其中所述垫圈围绕所述密封带。
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PCT/EP2015/055950 WO2015140305A1 (en) | 2014-03-21 | 2015-03-20 | Filter bag assembly |
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TW201834543A (zh) * | 2016-07-04 | 2018-09-16 | 托普索公司 | 過濾袋裝配 |
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TW201838708A (zh) * | 2017-03-02 | 2018-11-01 | 丹麥商托普索公司 | 用於移除來自工廠的廢氣所含有的硫氧化物和氮氧化物的方法 |
TW201838707A (zh) * | 2017-03-02 | 2018-11-01 | 丹麥商托普索公司 | 用於移除來自工廠的廢氣所含有的硫氧化物和氮氧化物的方法 |
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CN107213716A (zh) * | 2017-07-18 | 2017-09-29 | 江苏新科达滤袋有限公司 | 一种多功能滤袋 |
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CN106132505A (zh) | 2016-11-16 |
JP2017517394A (ja) | 2017-06-29 |
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KR20160130794A (ko) | 2016-11-14 |
AR100119A1 (es) | 2016-09-14 |
WO2015140305A1 (en) | 2015-09-24 |
US20170080387A1 (en) | 2017-03-23 |
KR102209923B1 (ko) | 2021-02-02 |
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TW201603864A (zh) | 2016-02-01 |
US10071340B2 (en) | 2018-09-11 |
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