{"id":1364,"date":"2026-06-26T06:20:27","date_gmt":"2026-06-26T06:20:27","guid":{"rendered":"https:\/\/worm-and-worm-wheel.com\/?p=1364"},"modified":"2026-06-26T06:20:27","modified_gmt":"2026-06-26T06:20:27","slug":"worm-and-worm-wheel-for-wastewater-treatment-mixers-and-scrapers","status":"publish","type":"post","link":"https:\/\/worm-and-worm-wheel.com\/cs\/worm-and-worm-wheel-for-wastewater-treatment-mixers-and-scrapers\/","title":{"rendered":"\u0160nek a \u0161nekov\u00e9 kolo pro m\u00edcha\u010dky a \u0161krabky na \u010di\u0161t\u011bn\u00ed odpadn\u00edch vod"},"content":{"rendered":"
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Korea Ever-Power \u00b7 Pr\u016fvodce aplika\u010dn\u00edm in\u017een\u00fdrstv\u00edm<\/p>\n

\u0160nek a \u0161nekov\u00e9 kolo pro m\u00edcha\u010dky a \u0161krabky na \u010di\u0161t\u011bn\u00ed odpadn\u00edch vod<\/h1>\n

M\u011bstsk\u00e1 \u010dist\u00edrna odpadn\u00edch vod zpracov\u00e1v\u00e1 odpadn\u00ed vody 24 hodin denn\u011b v atmosf\u00e9\u0159e nasycen\u00e9 sirovod\u00edkem o koncentraci 20 a\u017e 80 ppm. Pohon \u0161krab\u00e1ku \u010disti\u010de \u2013 \u0161nekov\u00e9 soukol\u00ed ot\u00e1\u010dej\u00edc\u00ed se rychlost\u00ed 0,05 ot\/min na venkovn\u00ed betonov\u00e9 plo\u0161in\u011b \u2013 se v t\u00e9to korozivn\u00ed atmosf\u00e9\u0159e nach\u00e1z\u00ed nep\u0159etr\u017eit\u011b 15 a\u017e 25 let. Standardn\u00ed pr\u016fmyslov\u00e1 ocel a bronz viditeln\u011b koroduj\u00ed b\u011bhem 12 m\u011bs\u00edc\u016f. Koncentrace H\u2082S ur\u010duje, kter\u00fd materi\u00e1l p\u0159e\u017eije.<\/p>\n

Promluvte si s technikem pro \u010di\u0161t\u011bn\u00ed odpadn\u00edch vod \u2192<\/a><\/p>\n<\/div>\n

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Rychl\u00e1 odpov\u011b\u010f<\/div>\n

\u010cist\u00edrny odpadn\u00edch vod pou\u017e\u00edvaj\u00ed \u0161nekov\u00e9 p\u0159evody pro \u0161krabky \u010disti\u010d\u016f, zahu\u0161\u0165ova\u010de kal\u016f, provzdu\u0161\u0148ovac\u00ed m\u00edcha\u010dky a pohony lopatek flokula\u010dn\u00edch za\u0159\u00edzen\u00ed \u2013 v\u0161echny tyto prvky vy\u017eaduj\u00ed ultran\u00edzk\u00e9 v\u00fdstupn\u00ed ot\u00e1\u010dky (0,02 a\u017e 2 ot.\/min), vysok\u00fd to\u010div\u00fd moment (500 a\u017e 10 000+ N\u00b7m) a nep\u0159etr\u017eit\u00fd venkovn\u00ed provoz v atmosf\u00e9\u0159e sirovod\u00edku (H\u2082S). Rozhodovac\u00ed strom pro materi\u00e1l H\u2082S klasifikuje expozici do \u010dty\u0159 koncentra\u010dn\u00edch p\u00e1sem a ka\u017ed\u00e9 z nich mapuje na po\u017eadovan\u00fd materi\u00e1l \u0161neku, slitinu kola, povrchovou \u00fapravu sk\u0159\u00edn\u011b a specifikaci t\u011bsn\u011bn\u00ed. P\u0159i koncentraci pod 5 ppm H\u2082S p\u0159e\u017eij\u00ed standardn\u00ed pozinkovan\u00e1 ocel a fosforov\u00fd bronz 10 a v\u00edce let. P\u0159i koncentraci 50 a\u017e 200 ppm poskytuje p\u0159ijatelnou \u017eivotnost pouze nerezov\u00e1 ocel 316L s hlin\u00edkov\u00fdm bronzem a pln\u00fdm epoxidov\u00fdm zapouzd\u0159en\u00edm. Provoz s ultran\u00edzk\u00fdmi ot\u00e1\u010dkami 0,02 a\u017e 0,1 ot.\/min pro \u0161krabky \u010disti\u010de vy\u017eaduje celkov\u00e9 p\u0159evodov\u00e9 pom\u011bry 1 000:1 a\u017e 5 000:1 \u2013 \u010deho\u017e se dosahuje kombinac\u00ed \u0161nekov\u00e9ho soukol\u00ed (40:1 a\u017e 80:1) se sekund\u00e1rn\u00edm \u010deln\u00edm nebo planetov\u00fdm stupn\u011bm (25:1 a\u017e 80:1), proto\u017ee p\u0159evodov\u00e9 pom\u011bry jednostup\u0148ov\u00fdch \u0161nek\u016f nad 100:1 jsou nepraktick\u00e9.<\/p>\n<\/div>\n

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Pro\u010d za\u0159\u00edzen\u00ed na \u010di\u0161t\u011bn\u00ed odpadn\u00edch vod pou\u017e\u00edv\u00e1 \u0161nekov\u00e9 p\u0159evody<\/h2>\n
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Procesy \u010di\u0161t\u011bn\u00ed odpadn\u00edch vod vy\u017eaduj\u00ed extr\u00e9mn\u011b pomal\u00e9 ot\u00e1\u010den\u00ed s vysok\u00fdm to\u010div\u00fdm momentem. St\u011brka prim\u00e1rn\u00edho \u010disti\u010de ot\u00e1\u010d\u00ed mostem o pr\u016fm\u011bru 30 metr\u016f rychlost\u00ed 0,03 a\u017e 0,05 ot.\/min \u2013 jednu plnou ot\u00e1\u010dku ka\u017ed\u00fdch 20 a\u017e 33 minut. Zahu\u0161\u0165ova\u010d kalu ot\u00e1\u010d\u00ed hr\u00e1b\u011b rychlost\u00ed 0,1 a\u017e 0,5 ot.\/min. M\u00edcha\u010dka v provzdu\u0161\u0148ovac\u00ed n\u00e1dr\u017ei ot\u00e1\u010d\u00ed vrtuli rychlost\u00ed 20 a\u017e 60 ot.\/min \u2013 rychleji, ale st\u00e1le hluboko pod typick\u00fdmi ot\u00e1\u010dkami motoru.<\/p>\n

\u0160nekov\u00fd p\u0159evodov\u00fd p\u00e1r zaji\u0161\u0165uje vysok\u00fd jednostup\u0148ov\u00fd p\u0159evodov\u00fd pom\u011br pot\u0159ebn\u00fd k p\u0159eklenut\u00ed rozd\u00edlu v ot\u00e1\u010dk\u00e1ch mezi motorem (1 450 ot.\/min.) a procesem (0,03 a\u017e 60 ot.\/min.), zat\u00edmco samosvorn\u00e1 vlastnost zabra\u0148uje un\u00e1\u0161en\u00ed ramene \u0161krab\u00e1ku vlivem un\u00e1\u0161en\u00ed kalem, kdy\u017e se motor zastav\u00ed z d\u016fvodu \u00fadr\u017eby nebo p\u0159eru\u0161en\u00ed nap\u00e1jen\u00ed.<\/p>\n<\/div>\n

\"Princip<\/div>\n<\/div>\n
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Ultravysok\u00fd pom\u011br v kompaktn\u00edm proveden\u00ed<\/div>\n

\u0160nekov\u00fd p\u0159evod s p\u0159evodem 60:1 v kombinaci s \u010deln\u00ed redukc\u00ed 50:1 vytv\u00e1\u0159\u00ed celkov\u00fd p\u0159evod 3 000:1 v pohonn\u00e9m bloku, kter\u00fd se umis\u0165uje na m\u016fstek \u010disti\u010de \u2013 p\u0159ev\u00e1d\u00ed ot\u00e1\u010dky motoru 1 450 ot.\/min na ot\u00e1\u010dky \u0161krab\u00e1ku 0,48 ot.\/min, ani\u017e by bylo nutn\u00e9 pou\u017e\u00edt samostatnou p\u0159evodovou v\u011b\u017e.<\/p>\n<\/div>\n

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Zadr\u017eov\u00e1n\u00ed kalov\u00e9ho ta\u017een\u00ed<\/div>\n

\u0160krabky \u010disti\u010d\u016f a zahu\u0161\u0165ovadel jsou vystaveny neust\u00e1l\u00e9mu ta\u017en\u00e9mu momentu od usazen\u00e9ho kalu. Pokud by pohon nebyl samosvorn\u00fd, \u0161krtic\u00ed mechanismus by \u0161krabku ot\u00e1\u010del dozadu \u2013 u v\u00edceramenn\u00fdch \u010disti\u010d\u016f by mohlo doj\u00edt k zamot\u00e1n\u00ed \u0159et\u011bz\u016f \u0161krabek.<\/p>\n<\/div>\n

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Nep\u0159etr\u017eit\u00fd venkovn\u00ed provoz 24\/7<\/div>\n

Procesy \u00fapravy prob\u00edhaj\u00ed nep\u0159etr\u017eit\u011b. \u0160nekov\u00fd p\u0159evod pracuje 8 760 hodin ro\u010dn\u011b \u2013 co\u017e je jedna z nejdel\u0161\u00edch ro\u010dn\u00edch provozn\u00edch hodin ze v\u0161ech aplikac\u00ed v t\u00e9to 30\u010dlenn\u00e9 \u0159ad\u011b. Maz\u00e1n\u00ed olejovou l\u00e1zn\u00ed s teplotn\u011b kompenzovanou v\u00fdm\u011bnou oleje je pro tento \u00fa\u010del standardn\u00ed.<\/p>\n<\/div>\n<\/div>\n

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Rozhodovac\u00ed strom pro korozivn\u00ed prost\u0159ed\u00ed s H\u2082S \u2013 od koncentrace po specifikaci materi\u00e1lu<\/h2>\n

Sirovod\u00edk (H\u2082S) je charakteristick\u00fd korozivn\u00ed plyn v prost\u0159ed\u00ed \u010dist\u00edren odpadn\u00edch vod. Vznik\u00e1 anaerobn\u00edm rozkladem organick\u00e9 hmoty \u2013 zejm\u00e9na v p\u0159ed\u010dist\u00edrn\u00e1ch, prim\u00e1rn\u00edch do\u010di\u0161\u0165ova\u010d\u00edch, kalov\u00fdch n\u00e1dr\u017e\u00edch a kryt\u00fdch fermentorech. Koncentrace H\u2082S se v r\u00e1mci jedn\u00e9 \u010cOV zna\u010dn\u011b li\u0161\u00ed: v oblasti filtrace p\u0159ed\u010dist\u00edrny m\u016f\u017ee b\u00fdt 50 a\u017e 200 ppm, zat\u00edmco v sekund\u00e1rn\u00ed do\u010di\u0161\u0165ovac\u00ed plo\u0161in\u011b m\u016f\u017ee b\u00fdt pouze 5 a\u017e 15 ppm. Materi\u00e1l \u0161nekov\u00e9ho kola mus\u00ed odpov\u00eddat m\u00edstn\u00ed koncentraci H\u2082S v m\u00edst\u011b jeho instalace \u2013 nikoli pr\u016fm\u011bru v \u010dist\u00edrn\u011b.<\/p>\n

\n\n\n\n\n\n\n\n\n
H\u2082S p\u00e1smo<\/th>\nTypick\u00e9 um\u00edst\u011bn\u00ed \u010cOV<\/th>\nMateri\u00e1l \u010derv\u016f<\/th>\nKola z lehk\u00fdch slitin<\/th>\nOchrana bydlen\u00ed<\/th>\nO\u010dek\u00e1van\u00e1 \u017eivotnost<\/th>\n<\/tr>\n<\/thead>\n
Pod 5 ppm (m\u00edrn\u00e9)<\/td>\nSekund\u00e1rn\u00ed usazovac\u00ed plo\u0161ina, odtokov\u00fd kan\u00e1l<\/td>\n\u017d\u00e1rov\u011b pozinkovan\u00e1 ocel<\/td>\nFosforov\u00fd bronz CuSn12Ni<\/td>\nEpoxidov\u00e1 barva, standardn\u00ed t\u011bsn\u011bn\u00ed<\/td>\n10 \u2013 15 let<\/td>\n<\/tr>\n
5 \u2013 25 ppm (st\u0159edn\u00ed)<\/td>\nPrim\u00e1rn\u00ed usazova\u010d, vstup do provzdu\u0161\u0148ovac\u00ed n\u00e1dr\u017ee<\/td>\nNerezov\u00e1 ocel 304<\/td>\nHlin\u00edkov\u00fd bronz CuAl10Fe5Ni5<\/td>\nSiln\u011b nan\u00e1\u0161iv\u00fd epoxid, t\u011bsn\u011bn\u00ed z PTFE<\/td>\n8 \u2013 12 let<\/td>\n<\/tr>\n
25 \u2013 100 ppm (vysok\u00e1)<\/td>\nHlavn\u00ed d\u00edlo, kryt\u00e1 prim\u00e1rn\u00ed n\u00e1dr\u017e, zahu\u0161\u0165ova\u010d kalu<\/td>\nNerezov\u00e1 ocel 316L<\/td>\nHlin\u00edkov\u00fd bronz CuAl10Fe5Ni5<\/td>\nT\u011bsn\u011bn\u00ed z epoxidu z \u010dernouheln\u00e9ho dehtu nebo vinylesteru, FKM<\/td>\n6 \u2013 10 let<\/td>\n<\/tr>\n
Nad 100 ppm (z\u00e1va\u017en\u00e9)<\/td>\nKryt\u00fd fermentor, uzav\u0159en\u00e1 manipulace s kalem<\/td>\nDuplexn\u00ed nerezov\u00e1 ocel 316L nebo 2205<\/td>\nNAB nikl-hlin\u00edkov\u00fd bronz<\/td>\nPln\u00e9 epoxidov\u00e9 zapouzd\u0159en\u00ed, p\u0159etlakov\u00e9 pouzdro<\/td>\n5 \u2013 8 let<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Jak H\u2082S po\u0161kozuje ozuben\u00e1 kola.<\/strong> H\u2082S se rozpou\u0161t\u00ed ve vlhk\u00e9m filmu na kovov\u00fdch povr\u0161\u00edch a tvo\u0159\u00ed kyselinu s\u00edrovou (za p\u0159\u00edtomnosti kysl\u00edku a vody). Tato kyselina napad\u00e1 jak ocelov\u00fd \u0161nek, tak bronzov\u00e9 kolo \u2013 ale r\u016fzn\u00fdmi mechanismy. Na oceli kyselina zp\u016fsobuje d\u016flkovou korozi, kter\u00e1 zdrs\u0148uje povrch z\u00e1vitu a zvy\u0161uje t\u0159en\u00ed. Na standardn\u00edm fosforov\u00e9m bronzu (CuSn12Ni) reaguje H\u2082S s m\u011bd\u00ed za vzniku sulfidu m\u011b\u010fnat\u00e9ho (Cu\u2082S) \u2013 \u010dern\u00e9 vrstvy, kter\u00e1 nep\u0159etr\u017eit\u011b roste a spot\u0159ebov\u00e1v\u00e1 povrch bronzu rychlost\u00ed 0,05 a\u017e 0,3 mm za rok v z\u00e1vislosti na koncentraci H\u2082S. Hlin\u00edkov\u00fd bronz (CuAl10Fe5Ni5) odol\u00e1v\u00e1 napaden\u00ed sulfidy, proto\u017ee povrchov\u00e1 vrstva oxidu hlinit\u00e9ho je v atmosf\u00e9\u0159e H\u2082S stabiln\u00ed \u2013 proto hlin\u00edkov\u00fd bronz nahrazuje fosforov\u00fd bronz p\u0159i koncentrac\u00edch H\u2082S nad 5 ppm.<\/p>\n

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Provoz s velmi n\u00edzk\u00fdmi ot\u00e1\u010dkami \u2013 0,02 a\u017e 2 ot.\/min. pro \u0161krabky \u010disti\u010de<\/h2>\n

\"\u0160nekov\u00fd<\/p>\n

\u0160krabky \u010disti\u010de pracuj\u00ed s tak n\u00edzk\u00fdmi v\u00fdstupn\u00edmi ot\u00e1\u010dkami, \u017ee ot\u00e1\u010den\u00ed je pro oko sotva post\u0159ehnuteln\u00e9 \u2013 0,03 a\u017e 0,05 ot.\/min u m\u016fstku prim\u00e1rn\u00edho \u010disti\u010de znamen\u00e1, \u017ee se \u0161pi\u010dka ramene \u0161krabky pohybuje po povrchu n\u00e1dr\u017ee rychlost\u00ed zhruba 5 a\u017e 8 metr\u016f za minutu. Tato ultran\u00edzk\u00e1 rychlost vy\u017eaduje celkov\u00e9 p\u0159evodov\u00e9 pom\u011bry 1 000:1 a\u017e 5 000:1 mezi motorem a hnac\u00ed h\u0159\u00eddel\u00ed \u0161krabky.<\/p>\n

Pro\u010d jednostup\u0148ov\u00e9 p\u00e1ry \u0161nekov\u00fdch p\u0159evod\u016f nemohou dos\u00e1hnout t\u011bchto p\u0159evodov\u00fdch pom\u011br\u016f.<\/strong> Jednostup\u0148ov\u00fd p\u00e1r \u0161nekov\u00fdch kol v modulu 3 a q = 10 m\u00e1 p\u0159evodov\u00fd pom\u011br p\u0159ibli\u017en\u011b 40:1. Zv\u00fd\u0161en\u00ed p\u0159evodov\u00e9ho pom\u011bru na 100:1 v r\u00e1mci jednoho stupn\u011b vy\u017eaduje bu\u010f neprakticky velk\u00e9 kolo (pr\u016fm\u011br se \u00fam\u011brn\u011b zv\u011bt\u0161uje), nebo neprakticky mal\u00fd pr\u016fm\u011br rozte\u010de \u0161neku (sn\u00ed\u017een\u00ed pevnosti). P\u0159evodov\u00e9 pom\u011bry nad 100:1 v jednom stupni \u0161nekov\u00e9ho kola jsou teoreticky mo\u017en\u00e9, ale vedou k p\u00e1r\u016fm s nepou\u017eitelnou geometri\u00ed \u2013 pr\u016fm\u011br \u0161neku se st\u00e1v\u00e1 p\u0159\u00edli\u0161 tenk\u00fdm pro kroutic\u00ed moment a kolo se st\u00e1v\u00e1 p\u0159\u00edli\u0161 velk\u00fdm pro sk\u0159\u00ed\u0148. Praktick\u00fdm \u0159e\u0161en\u00edm je slo\u017een\u00fd pohon: p\u00e1r \u0161nekov\u00fdch kol prvn\u00edho stupn\u011b (40:1 a\u017e 80:1) plus sekund\u00e1rn\u00ed \u010deln\u00ed, spir\u00e1lov\u00fd nebo planetov\u00fd stupe\u0148 (25:1 a\u017e 80:1). B\u011b\u017en\u00e9 slo\u017een\u00e9 pohony pro pohony \u010disti\u010d\u016f: \u0161nek 60:1 + \u010deln\u00ed kolo 50:1 = celkem 3 000:1 nebo \u0161nek 50:1 + planetov\u00e9 kolo 40:1 = celkem 2 000:1.<\/p>\n

Maz\u00e1n\u00ed p\u0159i ultran\u00edzk\u00e9 rychlosti.<\/strong> P\u0159i v\u00fdstupn\u00edch ot\u00e1\u010dk\u00e1ch 0,03 a\u017e 0,05 ot.\/min se vstupn\u00ed h\u0159\u00eddel \u0161neku ot\u00e1\u010d\u00ed rychlost\u00ed 50 a\u017e 250 ot.\/min (v z\u00e1vislosti na p\u0159evodov\u00e9m pom\u011bru \u0161neku v kombinovan\u00e9m pohonu). Tato vstupn\u00ed rychlost je dostate\u010dn\u00e1 k udr\u017een\u00ed hydrodynamick\u00e9ho olejov\u00e9ho filmu na z\u00e1vitu \u0161neku \u2013 na rozd\u00edl od n\u011bkter\u00fdch aplikac\u00ed s velmi n\u00edzk\u00fdmi ot\u00e1\u010dkami, kde dominuje mezn\u00ed maz\u00e1n\u00ed. Maz\u00e1n\u00ed v olejov\u00e9 l\u00e1zni je standardem pro \u0161nekov\u00e9 p\u0159evody \u010cOV, proto\u017ee nep\u0159etr\u017eit\u00fd provoz 24 hodin denn\u011b, 7 dn\u00ed v t\u00fddnu vytv\u00e1\u0159\u00ed trval\u00e9 teplo, kter\u00e9 se ut\u011bsn\u011bn\u00e9 mazivo nem\u016f\u017ee rozpt\u00fdlit b\u011bhem n\u011bkolikalet\u00fdch servisn\u00edch interval\u016f typick\u00fdch pro za\u0159\u00edzen\u00ed na \u00fapravu vody.<\/p>\n

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Pozn\u00e1mka k in\u017een\u00fdrsk\u00e9mu stolu<\/div>\n

Korejsk\u00e1 m\u011bstsk\u00e1 \u010dist\u00edrna odpadn\u00edch vod s kapacitou 200 000 obyvatel specifikovala p\u00e1ry \u0161nekov\u00fdch kol pro 4 pohony \u0161krab\u00e1k\u016f prim\u00e1rn\u00edho \u010disti\u010de. \u010cisti\u010de byly kruhov\u00e9ho typu s otev\u0159en\u00fdm prostorem, o pr\u016fm\u011bru 30 m, s centr\u00e1ln\u00edm pod\u00e1v\u00e1n\u00edm a perifern\u00edm p\u0159epadem. Koncentrace H\u2082S byla nam\u011b\u0159ena na \u00farovni desky \u010disti\u010de na \u00farovni 15 a\u017e 25 ppm \u2013 co\u017e p\u0159edstavuje m\u00edrnou expozici. P\u016fvodn\u00ed specifikace pou\u017e\u00edvala standardn\u00ed pozinkovan\u00e9 ocelov\u00e9 \u0161neky s koly z fosforov\u00e9ho bronzu \u2013 vhodn\u00e9 pro expozici pod 5 ppm, ale nedostate\u010dn\u011b specifikovan\u00e9 pro skute\u010dn\u00e9 prost\u0159ed\u00ed s koncentrac\u00ed 15 a\u017e 25 ppm. Po 4 letech se u dvou ze \u010dty\u0159 p\u00e1r\u016f \u0161nekov\u00fdch kol vyvinulo siln\u00e9 zbarven\u00ed bronzov\u00fdch kol sulfidy \u2013 tlou\u0161\u0165ka zubu se zmen\u0161ila o 0,18 mm (zhruba 12 procent p\u016fvodn\u00ed hodnoty) a v\u016fle se zv\u00fd\u0161ila 2,5kr\u00e1t. Zb\u00fdvaj\u00edc\u00ed dva p\u00e1ry (na n\u00e1v\u011btrn\u00e9 stran\u011b \u010disti\u010dky, kde je v d\u016fsledku p\u0159evl\u00e1daj\u00edc\u00edho v\u011btru ni\u017e\u0161\u00ed koncentrace H\u2082S) vykazovaly pouze m\u00edrn\u00e9 zbarven\u00ed. Specifikace n\u00e1hrady pro v\u0161echny \u010dty\u0159i: \u0161nek z nerezov\u00e9 oceli 304, kolo z hlin\u00edkov\u00e9ho bronzu CuAl10Fe5Ni5, siln\u011b nan\u00e1\u0161en\u00fd epoxidov\u00fd n\u00e1t\u011br pouzdra. Zv\u00fd\u0161en\u00ed ceny za p\u00e1r: 420 USD (z 680 USD na 1 100 USD). Kontrola po v\u00fdm\u011bn\u011b ve 3. roce: v\u0161echny \u010dty\u0159i p\u00e1ry vykazovaly zanedbateln\u00e9 napaden\u00ed sulfidy \u2013 povrch z hlin\u00edkov\u00e9ho bronzu je \u010dist\u00fd a stabiln\u00ed. Ponau\u010den\u00ed: koncentrace H\u2082S mus\u00ed b\u00fdt m\u011b\u0159ena v m\u00edst\u011b skute\u010dn\u00e9 instalace, nikoli odhadov\u00e1na z typu \u010disti\u010dky. Dva \u010disti\u010de v t\u00e9\u017ee \u010disti\u010dce mohou zaznamenat r\u016fzn\u00e9 hladiny H\u2082S v z\u00e1vislosti na p\u0159evl\u00e1daj\u00edc\u00edm v\u011btru, stavu krytu a bl\u00edzkosti p\u0159ed\u0159adn\u00edk\u016f.<\/p>\n<\/div>\n

<\/p>\n

Nep\u0159etr\u017eit\u00fd venkovn\u00ed provoz \u2013 kondenzace, teplotn\u00ed cykly a biofilm<\/h2>\n
\n
\"Ut\u011bsn\u011bn\u00e9<\/div>\n
\n

\u0160nekov\u00e9 p\u0159evodovky \u010dist\u00edren odpadn\u00edch vod pracuj\u00ed venku na m\u016fstc\u00edch \u010disti\u010d\u016f, palub\u00e1ch n\u00e1dr\u017e\u00ed a plo\u0161in\u00e1ch zahu\u0161\u0165ova\u010d\u016f \u2013 jsou neust\u00e1le vystaveny de\u0161ti, slunci, v\u011btru a atmosf\u00e9\u0159e H\u2082S. T\u011bleso a t\u011bsn\u011bn\u00ed p\u0159evodovky ovliv\u0148uj\u00ed krom\u011b H\u2082S t\u0159i dal\u0161\u00ed faktory prost\u0159ed\u00ed.<\/p>\n

\u0158\u00edzen\u00ed t\u011bchto faktor\u016f pomoc\u00ed konstrukce sk\u0159\u00edn\u011b, specifikace t\u011bsn\u011bn\u00ed a pl\u00e1nov\u00e1n\u00ed \u00fadr\u017eby prodlu\u017euje \u017eivotnost \u0161nekov\u00e9ho p\u0159evodu z o\u010dek\u00e1van\u00e9 doby omezen\u00e9 obsahem H\u2082S (5 a\u017e 15 let) na plnou mechanickou \u017eivotnost (15 a\u017e 25 let).<\/p>\n<\/div>\n<\/div>\n

\n
\n
Kondenzace<\/div>\n

Denn\u00ed teplotn\u00ed cykly (den-noc, sez\u00f3nn\u00ed) zp\u016fsobuj\u00ed kondenzaci uvnit\u0159 p\u0159evodov\u00e9 sk\u0159\u00edn\u011b \u2013 vodu, kter\u00e1 emulguje olej a urychluje vnit\u0159n\u00ed korozi. Odvzdu\u0161\u0148ovac\u00ed ventily s vysou\u0161ec\u00edmi patronami vyrovn\u00e1vaj\u00ed tlak a z\u00e1rove\u0148 blokuj\u00ed vlhkost. Vysou\u0161ec\u00ed prost\u0159edek vym\u011b\u0148ujte ka\u017ed\u00fdch 6 m\u011bs\u00edc\u016f. U kritick\u00fdch pohon\u016f nainstalujte n\u00edzkop\u0159\u00edkonovou topnou patronu (5\u201310 W), kter\u00e1 udr\u017euje teplotu sk\u0159\u00edn\u011b o 5 \u00b0C vy\u0161\u0161\u00ed ne\u017e rosn\u00fd bod okol\u00ed.<\/p>\n<\/div>\n

\n
Degradace UV z\u00e1\u0159en\u00edm a de\u0161t\u011bm<\/div>\n

UV z\u00e1\u0159en\u00ed degraduje standardn\u00ed nitrilov\u00e1 a NBR t\u011bsn\u011bn\u00ed b\u011bhem 2 a\u017e 3 let (prask\u00e1n\u00ed, k\u0159ehnut\u00ed). T\u011bsn\u011bn\u00ed z EPDM odol\u00e1vaj\u00ed UV z\u00e1\u0159en\u00ed 5 a\u017e 8 let; t\u011bsn\u011bn\u00ed z FKM (Viton) 10+ let. Pr\u016fnik vody zp\u016fsoben\u00fd de\u0161t\u011bm p\u0159es degradovan\u00e1 t\u011bsn\u011bn\u00ed vn\u00e1\u0161\u00ed vlhkost a rozpu\u0161t\u011bn\u00fd H\u2082S do oleje \u2013 co\u017e urychluje vnit\u0159n\u00ed korozi, i kdy\u017e je vn\u011bj\u0161\u00ed n\u00e1t\u011br sk\u0159\u00edn\u011b neporu\u0161en\u00fd.<\/p>\n<\/div>\n

\n
Biofilm a \u0159asy<\/div>\n

Tepl\u00e1, vlhk\u00e1 a na \u017eiviny bohat\u00e1 atmosf\u00e9ra \u010cOV podporuje r\u016fst biofilmu a \u0159as na povrchu sk\u0159\u00edn\u011b p\u0159evodovky. Biofilm zachycuje vlhkost na sk\u0159\u00edni, co\u017e urychluje degradaci barvy pod n\u00ed. Ka\u017edoro\u010dn\u00ed tlakov\u00e9 myt\u00ed vn\u011bj\u0161\u00edch \u010d\u00e1st\u00ed sk\u0159\u00edn\u011b odstra\u0148uje biofilm a umo\u017e\u0148uje vizu\u00e1ln\u00ed kontrolu stavu n\u00e1t\u011bru. Specifikujte antimikrobi\u00e1ln\u00ed p\u0159\u00edsadu do n\u00e1t\u011br\u016f sk\u0159\u00edn\u00ed v tropick\u00fdch instalac\u00edch \u010cOV.<\/p>\n<\/div>\n<\/div>\n

<\/p>\n

T\u0159i p\u0159\u00edpady specifikace p\u00e1ru \u0161nekov\u00fdch p\u0159evod\u016f pro \u010di\u0161t\u011bn\u00ed odpadn\u00edch vod<\/h2>\n

\"korozivzdorn\u00e9<\/p>\n

P\u0159\u00edpad 1 \u2013 Korejsk\u00e1 m\u011bstsk\u00e1 \u010cOV: 30 m \u010distic\u00ed \u0161krabka, 0,04 ot.\/min, m\u00edrn\u00fd obsah H\u2082S<\/h3>\n

Korejsk\u00e1 m\u011bstsk\u00e1 \u010dist\u00edrna odpadn\u00edch vod obsluhuj\u00edc\u00ed 200 000 obyvatel specifikovala \u0161nekov\u00e9 p\u0159evody pro 4 pohony \u0161krab\u00e1k\u016f prim\u00e1rn\u00edho \u010disti\u010de. Pr\u016fm\u011br \u010disti\u010de: 30 m. Typ \u0161krab\u00e1ku: oto\u010dn\u00fd most s oto\u010dn\u00fdm \u010depem a 4 \u0161krab\u00e1ky. V\u00fdstupn\u00ed ot\u00e1\u010dky: 0,04 ot.\/min (jedna ot\u00e1\u010dka za 25 minut). V\u00fdstupn\u00ed to\u010div\u00fd moment na kloubov\u00e9m h\u0159\u00eddeli: 6 500 N\u00b7m (odpor kalu p\u0159i maxim\u00e1ln\u00ed hloubce vrstven\u00ed). H\u2082S na plo\u0161in\u011b \u010disti\u010de: 15 a\u017e 25 ppm (st\u0159edn\u00ed p\u00e1smo). Slo\u017een\u00fd pohon: \u0161nekov\u00fd p\u0159evod 60:1 + \u010deln\u00ed p\u0159evod 60:1 = celkem 3 600:1. Motor: 3 kW, 1 450 ot.\/min. \u0160nekov\u00fd p\u0159evod (korigovan\u00e1 specifikace): jednostup\u0148ov\u00fd, modul 5, rozte\u010d 125 mm, jmenovit\u00fd kroutic\u00ed moment 2 200 N\u00b7m (\u010deln\u00ed p\u0159evod nese zb\u00fdvaj\u00edc\u00ed p\u0159evodov\u00fd pom\u011br). Materi\u00e1l: \u0161nek z nerezov\u00e9 oceli 304, kolo z hlin\u00edkov\u00e9ho bronzu CuAl10Fe5Ni5. Maz\u00e1n\u00ed v olejov\u00e9 l\u00e1zni se syntetick\u00fdm PAG dle normy ISO VG 460 (soubor aditiv odoln\u00fdch v\u016f\u010di H\u2082S). Pouzdro: siln\u011b nan\u00e1\u0161en\u00fd epoxidov\u00fd n\u00e1t\u011br (such\u00fd film minim\u00e1ln\u011b 250 \u00b5m). T\u011bsn\u011bn\u00ed: FKM (Viton) IP66 s vysou\u0161ec\u00edm odvzdu\u0161\u0148ova\u010dem. V\u00fdm\u011bna oleje: ka\u017ed\u00e9 2 roky na z\u00e1klad\u011b sledov\u00e1n\u00ed \u010d\u00edsla kyselosti. Cena za p\u00e1r \u0161nekov\u00fdch kol: 1 100 USD. C\u00edlov\u00e1 \u017eivotnost: 12 let.<\/p>\n

P\u0159\u00edpad 2 \u2013 Japonsk\u00e1 pr\u016fmyslov\u00e1 \u010cOV: zahu\u0161\u0165ovadlo kalu, 0,3 ot.\/min, vysok\u00fd obsah H\u2082S v bl\u00edzkosti fermentoru<\/h3>\n

Japonsk\u00e1 chemick\u00e1 spole\u010dnost specifikovala \u0161nekov\u00e9 p\u0159evody pro 2 pohony zahu\u0161\u0165ovadla s gravita\u010dn\u00edm p\u00e1sem ve sv\u00e9m za\u0159\u00edzen\u00ed na \u010di\u0161t\u011bn\u00ed pr\u016fmyslov\u00fdch odpadn\u00edch vod. Zahu\u0161\u0165ovadla byla um\u00edst\u011bna vedle anaerobn\u00edho digestoru \u2013 koncentrace H\u2082S m\u011b\u0159ena v rozmez\u00ed 60 a\u017e 90 ppm (horn\u00ed p\u00e1smo). V\u00fdstupn\u00ed ot\u00e1\u010dky: 0,3 ot\/min. V\u00fdstupn\u00ed to\u010div\u00fd moment: 1 800 N\u00b7m. Prost\u0159ed\u00ed s vysok\u00fdm obsahem H\u2082S vy\u017eadovalo plnou specifikaci protikorozn\u00ed ochrany: \u0161nekov\u00e9 p\u0159evody p\u0159i jednom spu\u0161t\u011bn\u00ed, modul 4, rozte\u010d 100 mm, p\u0159evodov\u00fd pom\u011br 40:1. Materi\u00e1l: \u0161nek z nerezov\u00e9 oceli 316L, kolo z hlin\u00edkov\u00e9ho bronzu. Pouzdro: epoxidov\u00fd povlak z \u010dernouheln\u00e9ho dehtu (vynikaj\u00edc\u00ed odolnost v\u016f\u010di H\u2082S oproti standardn\u00edmu epoxidu). T\u011bsn\u011bn\u00ed: FKM s tlakov\u00fdm labyrintem \u2013 pozitivn\u00ed vnit\u0159n\u00ed tlak dus\u00edku (0,3 bar) zabr\u00e1nil vnik\u00e1n\u00ed H\u2082S do sk\u0159\u00edn\u011b, i kdy\u017e koncentrace v atmosf\u00e9\u0159e dos\u00e1hla vrcholu 90 ppm b\u011bhem odv\u011btr\u00e1v\u00e1n\u00ed digestoru. Olej: syntetick\u00fd PAG ISO VG 680 s p\u0159\u00edsadou zachycuj\u00edc\u00ed s\u00edru. Cena za p\u00e1r: 1 850 USD (v\u010detn\u011b syst\u00e9mu tlakov\u00e9ho t\u011bsn\u011bn\u00ed). Dosa\u017een\u00e1 \u017eivotnost: 7 let do v\u00fdm\u011bny prvn\u00edho kola \u2013 v souladu s o\u010dek\u00e1v\u00e1n\u00edm 6 a\u017e 10 let pro 60 a\u017e 90 ppm H\u2082S. Proch\u00e1zet \u0161nekov\u00fd reduktor odoln\u00fd proti korozi<\/a> mo\u017enosti \u010di\u0161t\u011bn\u00ed odpadn\u00edch vod a pr\u016fmyslov\u00fdch aplikac\u00ed v atmosf\u00e9\u0159e H\u2082S.<\/p>\n

P\u0159\u00edpad 3 \u2013 Vietnamsk\u00fd akvakulturn\u00ed rybn\u00edk: lopatkov\u00fd provzdu\u0161\u0148ova\u010d, 20 ot.\/min, m\u00edrn\u00e1 atmosf\u00e9ra<\/h3>\n

Vietnamsk\u00e1 farma na chov krevet specifikovala \u0161nekov\u00e9 p\u0159evody pro 36 lopatkov\u00fdch aer\u00e1tor\u016f rozm\u00edst\u011bn\u00fdch ve 12 akvakulturn\u00edch rybn\u00edc\u00edch. Aer\u00e1tory v\u00ed\u0159ily vodu v rybn\u00edku, aby udr\u017eely rozpu\u0161t\u011bn\u00fd kysl\u00edk pro p\u0159e\u017eit\u00ed krevet \u2013 co\u017e je \u017eivotn\u011b d\u016fle\u017eit\u00e1 aplikace, kde by selh\u00e1n\u00ed aer\u00e1toru mohlo zp\u016fsobit hromadn\u00fd \u00fahyn krevet b\u011bhem n\u011bkolika hodin. V\u00fdstupn\u00ed ot\u00e1\u010dky: 20 ot.\/min (mnohem rychlej\u0161\u00ed ne\u017e u \u0161krabek \u010disti\u010de). V\u00fdstupn\u00ed to\u010div\u00fd moment: 120 N\u00b7m na aer\u00e1tor. H\u2082S: pod 3 ppm (m\u00edrn\u00e9 \u2013 otev\u0159en\u00e9 rybn\u00edky s dobr\u00fdm provzdu\u0161\u0148ov\u00e1n\u00edm). Specifikace byla \u0159\u00edzena n\u00e1klady: 36 jednotek s nejni\u017e\u0161\u00edmi n\u00e1klady na materi\u00e1l, kter\u00e9 spl\u0148uj\u00ed 5letou c\u00edlovou \u017eivotnost v m\u00edrn\u00e9m prost\u0159ed\u00ed. \u0160nekov\u00fd p\u0159evod: jednostup\u0148ov\u00fd, modul 3, rozte\u010d 63 mm, p\u0159evodov\u00fd pom\u011br 30:1. Materi\u00e1l: \u017e\u00e1rov\u011b pozinkovan\u00fd \u0161nek (adekv\u00e1tn\u00ed pro m\u00e9n\u011b ne\u017e 3 ppm H\u2082S), kolo z fosforov\u00e9ho bronzu. T\u011bsn\u011bn\u00ed: EPDM IP55 (z\u00f3na st\u0159\u00edkaj\u00edc\u00ed vody \u2013 aer\u00e1tory chrl\u00ed vodu, ale nejsou pono\u0159eny). Mazivo: standardn\u00ed lithn\u00fd komplexn\u00ed EP, domaz\u00e1van\u00e9 ka\u017ed\u00fdch 6 m\u011bs\u00edc\u016f pomoc\u00ed mazac\u00edho armatury. Cena za p\u00e1r: 48 USD. Cena za 36 kus\u016f: 1 728 USD. Cena 48 USD za p\u00e1r ochr\u00e1nila zhruba 5 000 USD krevet na rybn\u00edk a jeden cyklus chovu. Ro\u010dn\u00ed \u00fadr\u017eba: 6m\u011bs\u00ed\u010dn\u00ed maz\u00e1n\u00ed, ro\u010dn\u00ed kontrola t\u011bsn\u011bn\u00ed, 3let\u00e1 kontrola zinkov\u00e9ho povlaku (znovu pozinkovat nebo vym\u011bnit, pokud \u00fabytek zinku p\u0159es\u00e1hne 50 procent p\u016fvodn\u00ed tlou\u0161\u0165ky).<\/p>\n

\"workshop<\/p>\n

\u010casto kladen\u00e9 ot\u00e1zky<\/h2>\n
\n
\nOt\u00e1zka: Jak zm\u011b\u0159\u00edm koncentraci H\u2082S v m\u00edst\u011b instalace \u0161nekov\u00e9ho p\u0159evodu?<\/summary>\n

Pou\u017eijte p\u0159enosn\u00fd elektrochemick\u00fd detektor H\u2082S (cena: 200 a\u017e 500 USD) um\u00edst\u011bn\u00fd ve v\u00fd\u0161ce sk\u0159\u00edn\u011b \u0161nekov\u00e9ho p\u0159evodu na palub\u011b \u010disti\u010dky nebo plo\u0161in\u011b n\u00e1dr\u017ee. M\u011b\u0159te za nejhor\u0161\u00edch podm\u00ednek: tepl\u00e9 po\u010das\u00ed (emise H\u2082S se zvy\u0161uj\u00ed s teplotou), slab\u00fd v\u00edtr (koncentrace se hromad\u00ed) a maxim\u00e1ln\u00ed organick\u00e9 zat\u00ed\u017een\u00ed (obvykle v polovin\u011b odpoledne v m\u011bstsk\u00fdch \u010dist\u00edrn\u00e1ch odpadn\u00edch vod). Zaznamenejte pr\u016fm\u011brnou hodinovou koncentraci. M\u011b\u0159en\u00ed opakujte sez\u00f3nn\u011b \u2013 hladiny H\u2082S se mohou na stejn\u00e9m m\u00edst\u011b mezi zimou a l\u00e9tem 3 a\u017e 5kr\u00e1t li\u0161it. Pro specifikaci materi\u00e1lu pou\u017eijte nejvy\u0161\u0161\u00ed sez\u00f3nn\u00ed nam\u011b\u0159enou hodnotu.<\/p>\n<\/details>\n

\nOt\u00e1zka: Lze standardn\u00ed fosforov\u00fd bronz pou\u017e\u00edt v jak\u00e9koli aplikaci \u010cOV?<\/summary>\n

Pouze tam, kde je koncentrace H\u2082S trvale pod 5 ppm \u2013 typicky se jedn\u00e1 o sekund\u00e1rn\u00ed do\u010di\u0161\u0165ovac\u00ed desky, odpadn\u00ed kan\u00e1ly a filtra\u010dn\u00ed budovy v dob\u0159e v\u011btran\u00fdch za\u0159\u00edzen\u00edch. Nad 5 ppm se zmat\u0148ov\u00e1n\u00ed fosforov\u00e9ho bronzu sulfidy zrychluje do bodu, kdy doch\u00e1z\u00ed k m\u011b\u0159iteln\u00e9 ztr\u00e1t\u011b tlou\u0161\u0165ky zubu b\u011bhem 3 a\u017e 5 let. Hlin\u00edkov\u00fd bronz (CuAl10Fe5Ni5) je standardn\u00ed modernizac\u00ed pro v\u0161echna m\u00edsta s \u010dist\u00edrnami odpadn\u00edch vod nad 5 ppm H\u2082S \u2013 vrstva oxidu hlinit\u00e9ho odol\u00e1v\u00e1 napaden\u00ed sulfidy, na rozd\u00edl od fosforov\u00e9ho bronzu. N\u00e1kladov\u00e1 p\u0159ir\u00e1\u017eka hlin\u00edkov\u00e9ho bronzu oproti fosforov\u00e9mu bronzu je obvykle 30 a\u017e 50 procent na kolo \u2013 co\u017e je opodstatn\u011bn\u00e9 u d\u00edlu, u kter\u00e9ho se o\u010dek\u00e1v\u00e1, \u017ee v korozivn\u00edm prost\u0159ed\u00ed vydr\u017e\u00ed 10 a\u017e 15 let.<\/p>\n<\/details>\n

\nOt\u00e1zka: Jak\u00fd interval v\u00fdm\u011bny oleje by m\u011bly dodr\u017eovat p\u00e1ry \u0161nekov\u00fdch p\u0159evod\u016f \u010cOV?<\/summary>\n

Pro prost\u0159ed\u00ed s m\u00edrn\u00fdm obsahem H\u2082S (pod 5 ppm): ka\u017ed\u00e9 3 a\u017e 4 roky na z\u00e1klad\u011b anal\u00fdzy oleje (\u010d\u00edslo kyselosti pod 2,0 mgKOH\/g, obsah vody pod 0,1 procenta). Pro prost\u0159ed\u00ed se st\u0159edn\u00edm obsahem (5 a\u017e 25 ppm): ka\u017ed\u00e9 2 roky \u2013 stopy H\u2082S, kter\u00e9 pronikaj\u00ed do sk\u0159\u00edn\u011b, tvo\u0159\u00ed v oleji kyselinu s\u00edrovou, \u010d\u00edm\u017e se \u010d\u00edslo kyselosti zvy\u0161uje rychleji ne\u017e v \u010dist\u00fdch atmosf\u00e9r\u00e1ch. Pro prost\u0159ed\u00ed s vysok\u00fdm obsahem (nad 25 ppm): ka\u017edoro\u010dn\u00ed v\u00fdm\u011bna oleje bez ohledu na anal\u00fdzu \u2013 zat\u00ed\u017een\u00ed kontaminac\u00ed s\u00edrou je p\u0159\u00edli\u0161 vysok\u00e9 na to, aby bylo mo\u017en\u00e9 prodlou\u017eit intervaly. P\u0159idejte do v\u0161ech sk\u0159\u00edn\u00ed \u0161nekov\u00fdch p\u0159evod\u016f \u010cOV odvzdu\u0161\u0148ovac\u00ed filtr s obsahem desikantu bez ohledu na hladinu H\u2082S \u2013 samotn\u00e1 regulace vlhkosti prodlu\u017euje \u017eivotnost oleje o 30 a\u017e 50 procent.<\/p>\n<\/details>\n

\nOt\u00e1zka: Jak se m\u011bn\u00ed po\u017eadovan\u00fd to\u010div\u00fd moment s m\u011bn\u00edc\u00ed se hloubkou kalov\u00e9ho vlo\u010dkov\u00e9ho krytu?<\/summary>\n

To\u010div\u00fd moment \u0161nekov\u00e9ho kola se zvy\u0161uje zhruba line\u00e1rn\u011b s hloubkou kalov\u00e9ho krytu. \u010cisti\u010d s tenk\u00fdm krytem (100 a\u017e 200 mm) generuje n\u00edzk\u00fd odpor; stejn\u00fd \u010disti\u010d s tlust\u00fdm krytem (500 a\u017e 800 mm b\u011bhem \u0161pi\u010dkov\u00e9ho zat\u00ed\u017een\u00ed) generuje 2 a\u017e 4kr\u00e1t v\u011bt\u0161\u00ed odpor. \u0160nekov\u00fd p\u0159evod mus\u00ed b\u00fdt dimenzov\u00e1n na maxim\u00e1ln\u00ed podm\u00ednky krytu \u2013 ke kter\u00fdm m\u016f\u017ee doj\u00edt pouze b\u011bhem proud\u011bn\u00ed za vlhk\u00e9ho po\u010das\u00ed, kdy hydraulick\u00e9 zat\u00ed\u017een\u00ed vrchol\u00ed. Ur\u010den\u00ed podle pr\u016fm\u011brn\u00e9 hloubky krytu podhodnocuje dvojici zhruba o 50 procent. P\u0159idejte senzor p\u0159et\u00ed\u017een\u00ed to\u010div\u00e9ho momentu (monitorov\u00e1n\u00ed proudu na motoru), kter\u00fd upozorn\u00ed obsluhu, kdy\u017e se to\u010div\u00fd moment bl\u00ed\u017e\u00ed 80 procent\u016fm jmenovit\u00e9 kapacity \u2013 co\u017e signalizuje, \u017ee hloubka kalov\u00e9ho krytu vy\u017eaduje zv\u00fd\u0161en\u00e9 od\u010derp\u00e1v\u00e1n\u00ed, ne\u017e se \u0161krabka zastav\u00ed.<\/p>\n<\/details>\n

\nOt\u00e1zka: Jak\u00e1 je typick\u00e1 \u017eivotnost \u0161nekov\u00e9ho soukol\u00ed \u010cOV?<\/summary>\n

\u017divotnost je ur\u010dena t\u00edm, kter\u00e9ho limitu je dosa\u017eeno d\u0159\u00edve: koroze (zp\u016fsoben\u00e1 H\u2082S) nebo mechanick\u00e9 opot\u0159eben\u00ed. P\u0159i koncentraci pod 5 ppm H\u2082S se standardn\u00edmi materi\u00e1ly: 10 a\u017e 15 let p\u0159ed v\u00fdm\u011bnou z d\u016fvodu koroze. P\u0159i koncentraci 25 a\u017e 100 ppm s vhodn\u00fdmi materi\u00e1ly odoln\u00fdmi v\u016f\u010di H\u2082S: 6 a\u017e 10 let. Samotn\u00e9 mechanick\u00e9 opot\u0159eben\u00ed (v prost\u0159ed\u00ed s nulovou koroz\u00ed) by umo\u017enilo 15 a\u017e 25 let p\u0159i nep\u0159etr\u017eit\u00e9m provozu 24 hodin denn\u011b, 7 dn\u00ed v t\u00fddnu, kter\u00fd je typick\u00fd pro \u010cOV. Limit koroze t\u00e9m\u011b\u0159 v\u017edy nast\u00e1v\u00e1 p\u0159ed mechanick\u00fdm limitem \u2013 proto je koncentrace H\u2082S nejd\u016fle\u017eit\u011bj\u0161\u00edm vstupn\u00edm parametrem pro po\u0159\u00edzen\u00ed \u0161nekov\u00e9ho ozuben\u00e9ho kola pro \u010cOV. Spr\u00e1vn\u00fd v\u00fdb\u011br materi\u00e1lu pro skute\u010dnou hladinu H\u2082S zmen\u0161uje rozd\u00edl mezi korozn\u00ed a mechanickou \u017eivotnost\u00ed a maximalizuje n\u00e1vratnost investice do dra\u017e\u0161\u00ed specifikace odoln\u00e9 v\u016f\u010di H\u2082S.<\/p>\n<\/details>\n<\/div>\n

<\/p>\n

\u0160nekov\u00e9 p\u0159evody pro \u010di\u0161t\u011bn\u00ed odpadn\u00edch vod pracuj\u00ed na pr\u016fse\u010d\u00edku t\u0159\u00ed n\u00e1ro\u010dn\u00fdch podm\u00ednek: koroze sirovod\u00edkem (5 a\u017e 200+ ppm), ultran\u00edzk\u00e9 v\u00fdstupn\u00ed ot\u00e1\u010dky (0,02 a\u017e 2 ot.\/min. vy\u017eaduj\u00edc\u00ed slo\u017ekov\u00e9 pom\u011bry 1 000:1 a\u017e 5 000:1) a nep\u0159etr\u017eit\u00fd venkovn\u00ed provoz 24 hodin denn\u011b, 7 dn\u00ed v t\u00fddnu (8 760 provozn\u00edch hodin ro\u010dn\u011b). Rozhodovac\u00ed strom pro materi\u00e1l H\u2082S mapuje m\u00edstn\u00ed atmosf\u00e9rickou koncentraci v m\u00edst\u011b instalace na po\u017eadovan\u00fd materi\u00e1l \u0161neku, slitinu kola, povrchovou \u00fapravu sk\u0159\u00edn\u011b a specifikaci t\u011bsn\u011bn\u00ed \u2013 zaji\u0161\u0165uje tak, aby n\u00e1klady na materi\u00e1l odpov\u00eddaly skute\u010dn\u00e9 z\u00e1va\u017enosti koroze, a nikoliv aby se jednalo o nadm\u011brnou specifikaci (pl\u00fdtv\u00e1n\u00ed rozpo\u010dtem) nebo podm\u011bre\u010dnou specifikaci (zkr\u00e1cen\u00ed \u017eivotnosti na polovinu). Maz\u00e1n\u00ed v olejov\u00e9 l\u00e1zni s aditivy odoln\u00fdmi v\u016f\u010di H\u2082S a vysou\u0161ec\u00edmi odvzdu\u0161\u0148ova\u010di podporuje v\u00edcelet\u00e9 intervaly v\u00fdm\u011bny oleje, kter\u00e9 vy\u017eaduj\u00ed za\u0159\u00edzen\u00ed na \u00fapravu vody s nep\u0159etr\u017eit\u00fdm provozem.<\/p>\n

Pro v\u00fdrobce za\u0159\u00edzen\u00ed na \u00fapravu vody a provozovatele \u010cOV na\u0161e technick\u00e9 odd\u011blen\u00ed mapuje koncentraci H\u2082S na spr\u00e1vnou specifikaci materi\u00e1lu. Standardn\u00ed katalog korozivzdorn\u00e9 \u0161nekov\u00e9 p\u0159evodovky<\/a> Pokr\u00fdv\u00e1 velikosti \u010cOV s rozte\u010d\u00ed st\u0159ed\u016f od 80 do 200 mm s variantami z pozinkovan\u00e9 oceli, nerezov\u00e9 oceli 304 a nerezov\u00e9 oceli 316L v kombinaci s koly z fosforov\u00e9ho bronzu a hlin\u00edkov\u00e9ho bronzu. Za\u0161lete specifikaci pohonu odpadn\u00edch vod s m\u011b\u0159en\u00edm H\u2082S, v\u00fdstupn\u00edmi ot\u00e1\u010dkami, to\u010div\u00fdm momentem a m\u00edstem instalace v r\u00e1mci \u010dist\u00edrny.<\/p>\n

<\/p>\n

\n

Specifikace p\u00e1r\u016f \u0161nekov\u00fdch p\u0159evod\u016f pro za\u0159\u00edzen\u00ed na \u010di\u0161t\u011bn\u00ed odpadn\u00edch vod?<\/h3>\n

Ode\u0161lete koncentraci H\u2082S v m\u00edst\u011b instalace, v\u00fdstupn\u00ed ot\u00e1\u010dky a to\u010div\u00fd moment, typ \u010disti\u010de nebo za\u0159\u00edzen\u00ed a zda je pohon venkovn\u00ed nebo uzav\u0159en\u00fd. Za\u0159ad\u00edme p\u00e1smo H\u2082S a doporu\u010d\u00edme spr\u00e1vn\u00fd materi\u00e1l, povrchovou \u00fapravu a t\u011bsn\u011bn\u00ed.<\/p>\n

Vy\u017e\u00e1dejte si specifikaci pohonu odpadn\u00edch vod \u2192<\/a><\/p>\n<\/div>\n

St\u0159iha\u010d: Cxm<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

Korea Ever-Power \u00b7 Application Engineering Guide Worm and Worm Wheel for Wastewater Treatment Mixers and Scrapers A municipal wastewater treatment plant processes sewage 24 hours a day in an atmosphere saturated with hydrogen sulphide at 20 to 80 ppm. The clarifier scraper drive \u2014 a worm gear pair turning at 0.05 RPM on an outdoor […]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[2821],"tags":[],"class_list":["post-1364","post","type-post","status-publish","format-standard","hentry","category-worm-and-worm-wheel"],"_links":{"self":[{"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/posts\/1364","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/comments?post=1364"}],"version-history":[{"count":1,"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/posts\/1364\/revisions"}],"predecessor-version":[{"id":1366,"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/posts\/1364\/revisions\/1366"}],"wp:attachment":[{"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/media?parent=1364"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/categories?post=1364"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/tags?post=1364"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}