{"id":223,"date":"2020-11-17T13:38:51","date_gmt":"2020-11-17T13:38:51","guid":{"rendered":"https:\/\/www.aleroma.ro\/blog\/?p=223"},"modified":"2026-01-19T12:12:06","modified_gmt":"2026-01-19T10:12:06","slug":"magnetita-ce-este-si-cum-scapi-de-ea-la-centralele-electrice","status":"publish","type":"post","link":"https:\/\/www.aleroma.ro\/blog\/magnetita-ce-este-si-cum-scapi-de-ea-la-centralele-electrice\/","title":{"rendered":"Magnetita: Ce este \u0219i cum scapi de ea la centralele electrice?"},"content":{"rendered":"\n<p>Odat\u0103 cu schimbarea anotimpurilor \u0219i apropierea iernii, orice posesor de central\u0103 termic\u0103 \u0219tie c\u0103 a venit timpul s\u0103 \u00eenceap\u0103 preg\u0103tirile pentru revizia \u0219i punerea \u00een func\u021biune a centralei.<\/p>\n\n\n\n<p>Datorit\u0103 func\u021bion\u0103rii intense, \u00een timp, centrala poate da semne c\u0103 are mici disfunc\u021bionalit\u0103\u021bi. Una dintre principalele probleme care apare \u00een utilizarea centralelor electrice este magnetita.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Ce este magnetita?<\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/www.aleroma.ro\/centrala-termica-motan-kplus-23-erp-23-kw-filtru-antimagnetita-ultra-mag-p2763\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"698\" src=\"https:\/\/www.aleroma.ro\/blog\/wp-content\/uploads\/2020\/11\/magnetita-si-centrala-electrica-1.jpg\" alt=\"Ce este magnetita?\" class=\"wp-image-231\" srcset=\"https:\/\/www.aleroma.ro\/blog\/wp-content\/uploads\/2020\/11\/magnetita-si-centrala-electrica-1.jpg 800w, https:\/\/www.aleroma.ro\/blog\/wp-content\/uploads\/2020\/11\/magnetita-si-centrala-electrica-1-300x262.jpg 300w, https:\/\/www.aleroma.ro\/blog\/wp-content\/uploads\/2020\/11\/magnetita-si-centrala-electrica-1-768x670.jpg 768w\" sizes=\"auto, (max-width: 767px) 89vw, (max-width: 1000px) 54vw, (max-width: 1071px) 543px, 580px\" \/><\/a><figcaption>Sursa: Aleroma.ro<\/figcaption><\/figure>\n\n\n\n<p><strong>Magnetitul<\/strong>&nbsp;(sau&nbsp;<strong>magnetita<\/strong>&nbsp;cum este denumirea comun\u0103) este un oxid de fier de culoare neagr\u0103, cu caracteristici feromagnetice. Se g\u0103se\u0219te \u00een natur\u0103 sub form\u0103 cristalin\u0103, fiind un rezultat al proceselor de vulcanism. El mai poate fi poate fi produs \u0219i artificial, pe cale industrial\u0103, prin procese de prelucrare la mare temperatur\u0103.<\/p>\n\n\n\n<p>Ca&nbsp;<strong>structur\u0103<\/strong>, acest oxid este lucios, de culoare neagr\u0103, iar datorit\u0103 propriet\u0103\u021bilor sale, magnetitul este unul dintre cei mai rezisten\u021bi oxizi \u00een reac\u021bie cu acizi \u0219i baze. Formula chimic\u0103 este Fe3O4.<\/p>\n\n\n\n<p>Tocmai datorit\u0103 stabilit\u0103\u021bii sale \u00een reac\u021bie cu acizi \u0219i baze, magnetitul este amestecat cu alte substan\u021be cum ar fi uleiuri, vaseline sau alte minerale folosite de produc\u0103tori pentru a proteja echipamentul pe durata depozit\u0103rii. Odat\u0103 instalat\u0103 \u0219i pus\u0103 \u00een func\u021biune centrala electric\u0103, \u00een cazul \u00een care exist\u0103 pe undeva magnetit\u0103, aceasta poate afecta serios instala\u021bia de \u00eenc\u0103lzire.<\/p>\n\n\n\n<p>Magnetita mai poate ajunge \u00een circuitul de \u00eenc\u0103lzire&nbsp;<em>fie pe cale natural\u0103<\/em>,&nbsp;<em>prin reziduuri din construc\u021bii<\/em>&nbsp;sau&nbsp;<em>din ap\u0103<\/em>. De asemenea, \u00een timpul exploat\u0103rii sistemului de \u00eenc\u0103lzire, magnetita poate fi creat\u0103 ca urmare a temperaturilor \u0219i presiunii ridicate.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Cum afecteaz\u0103 magnetita centrala?<\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"507\" src=\"https:\/\/www.aleroma.ro\/blog\/wp-content\/uploads\/2020\/11\/cum-afecteaza-magnetita-centrala-electrica-1024x507.jpg\" alt=\"Cum este afectat\u0103 centrala de magnetit\u0103?\" class=\"wp-image-225\" srcset=\"https:\/\/www.aleroma.ro\/blog\/wp-content\/uploads\/2020\/11\/cum-afecteaza-magnetita-centrala-electrica-1024x507.jpg 1024w, https:\/\/www.aleroma.ro\/blog\/wp-content\/uploads\/2020\/11\/cum-afecteaza-magnetita-centrala-electrica-300x148.jpg 300w, https:\/\/www.aleroma.ro\/blog\/wp-content\/uploads\/2020\/11\/cum-afecteaza-magnetita-centrala-electrica-768x380.jpg 768w, https:\/\/www.aleroma.ro\/blog\/wp-content\/uploads\/2020\/11\/cum-afecteaza-magnetita-centrala-electrica-1536x760.jpg 1536w, https:\/\/www.aleroma.ro\/blog\/wp-content\/uploads\/2020\/11\/cum-afecteaza-magnetita-centrala-electrica-2048x1013.jpg 2048w\" sizes=\"auto, (max-width: 767px) 89vw, (max-width: 1000px) 54vw, (max-width: 1071px) 543px, 580px\" \/><figcaption>Sursa: Freepik.com<\/figcaption><\/figure>\n\n\n\n<p>\u00cenainte de a porni centrala termic\u0103, ar fi bine s\u0103 te asiguri c\u0103&nbsp;<em>magnetita ce a servit drept drept protec\u021bie \u00een perioada de depozitare a fost \u00eenl\u0103turat\u0103<\/em>. \u00cen caz contrar, aceasta, se poate depune pe componentele func\u021bionale ale sistemului de \u00eenc\u0103lzire, afect\u00e2nd \u00eentregul circuit.<\/p>\n\n\n\n<p>Din moment ce filtrele standard cu care sunt prev\u0103zute echipamentele de \u00eenc\u0103lzire nu pot filtra acest ferometal, magnetita poate fi proveni \u0219i din afara sistemului. Acest oxid de fier se depune pe piesele mecanice ale centralei afect\u00e2ndu-i func\u021bionarea \u0219i produc\u00e2nd defec\u021biuni severe.<\/p>\n\n\n\n<p>Magnetita este <em>rezistent\u0103 la coroziune<\/em>. O putem g\u0103si, de asemenea, \u00een instala\u021biile cu componente din o\u021bel \u0219i font\u0103. Acest lucru este determinat de procesele complexe de oxidare din cauza&nbsp;<em>condi\u021biilor de temperatur\u0103<\/em>,&nbsp;<em>presiune&nbsp;<\/em>\u0219i&nbsp;<em>oxigen&nbsp;<\/em>din fluidul termic.<\/p>\n\n\n\n<p>Dac\u0103 centrala prezint\u0103 avarie, acest lucru poate fi cauzat\u0103 de depunerile de magnetit\u0103 pe pompa de circula\u021bie a centralei sau pe schimb\u0103torul de c\u0103ldur\u0103. De asemenea, magnetita se mai sedimenteaz\u0103 \u0219i pe robine\u021bii de \u00eenchidere de urgen\u021b\u0103, \u00eempiedic\u00e2nd proprietarul s\u0103 \u00eentrerup\u0103 alimentarea cu gaz sau apa de la robine\u021bi.<\/p>\n\n\n\n<p>Chiar dac\u0103 echipamentul de \u00eenc\u0103lzire nu se defecteaz\u0103 complet, zgomotele puternice, imposibilitatea centralei de a \u00eenc\u0103lzi agentul termic la temperatura reglat\u0103 de c\u0103tre utilizator indic\u0103 existen\u021ba depunerilor de magnetit\u0103.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Cum afecteaz\u0103 magnetita circuitul de \u00eenc\u0103lzire?<\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"496\" src=\"https:\/\/www.aleroma.ro\/blog\/wp-content\/uploads\/2020\/11\/cum-afecteaza-magnetita-intregul-circuit-1-1024x496.png\" alt=\"Cum este afectat circuitul termic de c\u0103tre magnetit\u0103?\" class=\"wp-image-227\" srcset=\"https:\/\/www.aleroma.ro\/blog\/wp-content\/uploads\/2020\/11\/cum-afecteaza-magnetita-intregul-circuit-1-1024x496.png 1024w, https:\/\/www.aleroma.ro\/blog\/wp-content\/uploads\/2020\/11\/cum-afecteaza-magnetita-intregul-circuit-1-300x145.png 300w, https:\/\/www.aleroma.ro\/blog\/wp-content\/uploads\/2020\/11\/cum-afecteaza-magnetita-intregul-circuit-1-768x372.png 768w, https:\/\/www.aleroma.ro\/blog\/wp-content\/uploads\/2020\/11\/cum-afecteaza-magnetita-intregul-circuit-1-1536x744.png 1536w, https:\/\/www.aleroma.ro\/blog\/wp-content\/uploads\/2020\/11\/cum-afecteaza-magnetita-intregul-circuit-1.png 1865w\" sizes=\"auto, (max-width: 767px) 89vw, (max-width: 1000px) 54vw, (max-width: 1071px) 543px, 580px\" \/><figcaption>Sursa: Freepik.com<\/figcaption><\/figure>\n\n\n\n<p>Magnetita se depune \u00een interiorul caloriferelor \u0219i al conductelor \u0219i \u00een felul acesta afecteaz\u0103 \u00eentregul circuit de \u00eenc\u0103lzire. Din cauza existen\u021bei acestui strat metaloferos, agentul termic nu mai curge normal prin sistem, iar locuin\u021ba nu se mai \u00eenc\u0103lze\u0219te eficient.<\/p>\n\n\n\n<p>Magnetita din calorifere genereaz\u0103 zgomote nepl\u0103cute, iar la cur\u0103\u021barea radiatoarelor se observ\u0103 c\u0103 apa are o culoare maronie spre negricioas\u0103 \u0219i textur\u0103 m\u00e2zgoas\u0103 (fiind \u00een amestec cu alte reziduuri). Din p\u0103cate, din cauza acestui oxid, locuin\u021ba nu se mai \u00eenc\u0103lze\u0219te la nivelul dorit.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">De ce se formeaz\u0103 rugina \u0219i n\u0103molul?<\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/www.aleroma.ro\/blog\/wp-content\/uploads\/2020\/11\/de-ce-se-formeaza-rugina-1024x768.jpg\" alt=\"Motivul pentru care se formeaz\u0103 rugina \u0219i n\u0103molul\" class=\"wp-image-228\" srcset=\"https:\/\/www.aleroma.ro\/blog\/wp-content\/uploads\/2020\/11\/de-ce-se-formeaza-rugina-1024x768.jpg 1024w, https:\/\/www.aleroma.ro\/blog\/wp-content\/uploads\/2020\/11\/de-ce-se-formeaza-rugina-300x225.jpg 300w, https:\/\/www.aleroma.ro\/blog\/wp-content\/uploads\/2020\/11\/de-ce-se-formeaza-rugina-768x576.jpg 768w, https:\/\/www.aleroma.ro\/blog\/wp-content\/uploads\/2020\/11\/de-ce-se-formeaza-rugina-1536x1152.jpg 1536w, https:\/\/www.aleroma.ro\/blog\/wp-content\/uploads\/2020\/11\/de-ce-se-formeaza-rugina-320x240.jpg 320w, https:\/\/www.aleroma.ro\/blog\/wp-content\/uploads\/2020\/11\/de-ce-se-formeaza-rugina-100x75.jpg 100w, https:\/\/www.aleroma.ro\/blog\/wp-content\/uploads\/2020\/11\/de-ce-se-formeaza-rugina.jpg 1920w\" sizes=\"auto, (max-width: 767px) 89vw, (max-width: 1000px) 54vw, (max-width: 1071px) 543px, 580px\" \/><figcaption>Sursa: Unsplash.com<\/figcaption><\/figure>\n\n\n\n<p>Rugina se creeaz\u0103 ca rezultat al fluxului de ap\u0103 prin conductele metalice, prin central\u0103 \u0219i calorifere. Dac\u0103 aceast\u0103 rugin\u0103 se amestec\u0103 cu alte impurit\u0103\u021bi, se formeaz\u0103 un fel de n\u0103mol, iar apa devine \u00eenchis\u0103 la culoare.<\/p>\n\n\n\n<p>Dac\u0103 nu sunt eliminate din instala\u021bie, n\u0103molul \u0219i particulele metalice pot genera anumite consecin\u021be asupra sistemului de \u00eenc\u0103lzire:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Zgomot de la centrala termic\u0103 \u0219i de la calorifere;<\/li><li>\u00cenc\u0103lzirea dificil\u0103 a caloriferelor;<\/li><li>Apa de culoare \u00eenchis\u0103 \u00een instala\u021bie;<\/li><li>Defectarea centralei.<\/li><\/ul>\n\n\n\n<p>\u00cen timp, centrala termic\u0103 nu va mai func\u021biona la nivelul dorit. Valoarea facturilor de \u00eenc\u0103lzire va cre\u0219te \u0219i, \u00een cel mai r\u0103u caz, va trebui s\u0103 schimbi centrala termic\u0103.<\/p>\n\n\n\n<p>Sedimentarea de n\u0103mol \u0219i magnetit\u0103 din calorifere nu permite:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u00eenc\u0103lzirea \u00eentregilor por\u021biuni;<\/li><li>eficientizarea circula\u021biei.<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Ce po\u021bi face pentru a preveni apari\u021bia magnetitei? <\/h2>\n\n\n\n<p>Prima \u0219i cea mai la \u00eendem\u00e2n\u0103 m\u0103sur\u0103 \u00eempotriva magnetitei este&nbsp;<strong>s\u0103 cure\u021bi echipamentul pentru a elimina substan\u021ba folosit\u0103 ca protec\u021bie<\/strong>&nbsp;\u00een timpul depozit\u0103rii. A doua m\u0103sur\u0103 este&nbsp;<strong>s\u0103 te g\u00e2nde\u0219ti la o protec\u021bie pe termen lung<\/strong>&nbsp;ca s\u0103 previi aceast\u0103 problem\u0103.<\/p>\n\n\n\n<p>Alternativ, centrala termic\u0103 \u0219i circuitul aferent se mai pot cur\u0103\u021ba cu ajutorul unor&nbsp;<strong>pompe externe de sp\u0103lare cu supape de sens<\/strong>. Astfel se schimb\u0103 direc\u021bia de sp\u0103lare la un interval similar de timp, p\u00e2n\u0103 c\u00e2nd lichidul iese curat. Procedura dureaz\u0103 aproximativ 30 de minute.<\/p>\n\n\n\n<p>O alt\u0103 posibilitate este s\u0103 apelezi la&nbsp;<strong>sp\u0103larea chimic\u0103<\/strong>. Este o procedur\u0103 care utilizeaz\u0103 o&nbsp;<em>substan\u021b\u0103 alcalin\u0103<\/em>&nbsp;prin care se \u00eendep\u0103rteaz\u0103 reziduuri sedimentate (m\u00e2l \u0219i al\u021bi compu\u0219i metalici), rezultate din coroziune mecanic\u0103 ca efect al presiunii apei \u0219i al mi\u0219c\u0103rii angrenajelor din circuit. Este o substan\u021b\u0103 non-coroziv\u0103, conform\u0103 cu legisla\u021bia \u00een vigoare privind protec\u021bia mediului.<\/p>\n\n\n\n<p>La sf\u00e2r\u0219it, apa va trebui cl\u0103tit\u0103 p\u00e2n\u0103 \u00een momentul \u00een care PH-ul circuitului ajunge la valoarea de 8 &#8211; 8,5. Pentru a determina nivelul de alcalinitate al unui sistem, trebuie s\u0103 utilizezi un kit special.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Ce este filtrul antimagnetit\u0103?<\/h2>\n\n\n\n<p>Din moment ce instala\u021bia de \u00eenc\u0103lzire este alimentat\u0103 cu ap\u0103 (\u00een mod repetat) \u0219i exist\u0103 posibilitatea p\u0103trunderii aerului \u00een anumite zone, se recomand\u0103&nbsp;<em>instalarea unui filtru antimagnetit\u0103<\/em>. Acesta reprezint\u0103 cea mai bun\u0103 metod\u0103 de prevenire \u00een timp.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/www.aleroma.ro\/blog\/wp-content\/uploads\/2020\/11\/filtru-antimagnetita.jpg\" alt=\"Ce reprezint\u0103 filtrul antimagnetit\u0103?\" class=\"wp-image-229\" srcset=\"https:\/\/www.aleroma.ro\/blog\/wp-content\/uploads\/2020\/11\/filtru-antimagnetita.jpg 500w, https:\/\/www.aleroma.ro\/blog\/wp-content\/uploads\/2020\/11\/filtru-antimagnetita-300x300.jpg 300w, https:\/\/www.aleroma.ro\/blog\/wp-content\/uploads\/2020\/11\/filtru-antimagnetita-150x150.jpg 150w, https:\/\/www.aleroma.ro\/blog\/wp-content\/uploads\/2020\/11\/filtru-antimagnetita-100x100.jpg 100w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><figcaption>Sursa: Aleroma.ro<\/figcaption><\/figure>\n\n\n\n<p><strong><a href=\"https:\/\/www.aleroma.ro\/filtru-magnetic-antimagnetita-honeywell-mhf49-22a-11-000-gauss-p3047\" target=\"_blank\" rel=\"noreferrer noopener\">Filtrul antimagnetit\u0103<\/a><\/strong>&nbsp;reprezint\u0103 o modalitate eficient\u0103 de a elimina sedimentele feroase din circuitul de \u00eenc\u0103lzire. Se instaleaz\u0103 pe \u021bevile centralei termice pentru:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>a \u00eendep\u0103rta n\u0103molul din ap\u0103<\/li><li>a evita depunerile sau \u00eenfundarea \u021bevilor.<\/li><\/ul>\n\n\n\n<p>Dac\u0103 vei monta un astfel de filtru la centrala termic\u0103, vei beneficia de&nbsp;<strong>avantaje&nbsp;<\/strong>precum:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Un sistem de \u00eenc\u0103lzire mai eficient;<\/li><li>Facturi de \u00eenc\u0103lzire mai mici;<\/li><li>protejarea centralei termic\u0103 de impurit\u0103\u021bile metalice \u0219i nisipoase acumulate \u00een sistemul de \u00eenc\u0103lzire \u0219i, \u00een felul acesta, reduci riscul unor repara\u021bii costisitoare;<\/li><li>\u00eempiedicarea \u00eenfund\u0103rii schimb\u0103torului \u00een pl\u0103ci al centralei;<\/li><li>Cre\u0219terea duratei de operare a centralei termice.<\/li><\/ul>\n\n\n\n<p>Majoritatea posesorilor de centrale termice nu cunosc acest am\u0103nunt pentru c\u0103 nu le spune nimeni de asta atunci c\u00e2nd achizi\u021bioneaz\u0103 o centrala electric\u0103. \u00cens\u0103, cunoa\u0219terea detaliului legat de posibilitatea form\u0103rii magnetitei (deloc de neglijat):<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u00ee\u021bi poate face via\u021ba mai u\u0219oar\u0103;<\/li><li>te poate scuti de repara\u021bii inutile \u0219i costisitoare.<\/li><\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Odat\u0103 cu schimbarea anotimpurilor \u0219i apropierea iernii, orice posesor de central\u0103 termic\u0103 \u0219tie c\u0103 a venit timpul s\u0103 \u00eenceap\u0103 preg\u0103tirile pentru revizia \u0219i punerea \u00een func\u021biune a centralei. Datorit\u0103 func\u021bion\u0103rii intense, \u00een timp, centrala poate da semne c\u0103 are mici disfunc\u021bionalit\u0103\u021bi. Una dintre principalele probleme care apare \u00een utilizarea centralelor electrice este magnetita. Ce este&#8230;<\/p>\n","protected":false},"author":2,"featured_media":233,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-223","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-intretinerea-si-alegerea-echipamentelor"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Magnetita: Ce este \u0219i cum scapi de ea la centralele electrice? - Aleroma<\/title>\n<meta name=\"description\" content=\"Magnetita: Ce este \u0219i cum scapi de ea la centralele electrice? - Aleroma\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.aleroma.ro\/blog\/magnetita-ce-este-si-cum-scapi-de-ea-la-centralele-electrice\/\" \/>\n<meta property=\"og:locale\" content=\"ro_RO\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Magnetita: Ce este \u0219i cum scapi de ea la centralele electrice? 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