{"id":5852,"date":"2020-10-21T05:51:37","date_gmt":"2020-10-21T05:51:37","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=5852"},"modified":"2020-10-21T05:52:05","modified_gmt":"2020-10-21T05:52:05","slug":"filtration-efficiency","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/filtration-efficiency\/","title":{"rendered":"Efici\u00eancia de filtragem"},"content":{"rendered":"

A efici\u00eancia de filtra\u00e7\u00e3o \u00e9 o principal \u00edndice para avaliar o meio filtrante ou o filtro, sendo expressa pela raz\u00e3o entre a massa de s\u00f3lidos capturados pela opera\u00e7\u00e3o de filtra\u00e7\u00e3o e o teor original. Os fatores que afetam a efici\u00eancia de filtra\u00e7\u00e3o dos meios filtrantes incluem as propriedades dos meios filtrantes e dos s\u00f3lidos em suspens\u00e3o.<\/p>\n

Influ\u00eancia do meio filtrante na efici\u00eancia de reten\u00e7\u00e3o<\/strong><\/p>\n

1) Tamanho das part\u00edculas. A efici\u00eancia de filtra\u00e7\u00e3o \u00e9 inversamente proporcional ao tamanho das part\u00edculas; ou seja, quanto menor o tamanho das part\u00edculas, maior a efici\u00eancia de filtra\u00e7\u00e3o, mas a perda de carga tamb\u00e9m aumenta<\/p>\n

2) Forma. A \u00e1rea superficial do material angular \u00e9 maior do que a do material filtrante esf\u00e9rico com o mesmo volume. Portanto, quando a porosidade \u00e9 a mesma, a efici\u00eancia de filtragem do material filtrante angular \u00e9 elevada.<\/p>\n

3) Porosidade. A porosidade das esferas meio filtrante<\/a> tem pouca rela\u00e7\u00e3o com o tamanho das part\u00edculas. No entanto, a porosidade dos meios filtrantes angulares depende do tamanho das part\u00edculas e de sua distribui\u00e7\u00e3o.<\/p>\n

4) Espessura. Quanto mais espesso for o leito filtrante, mais l\u00edmpido ser\u00e1 o filtrado e mais longo ser\u00e1 o ciclo de opera\u00e7\u00e3o.<\/p>\n

5) Propriedades da superf\u00edcie. A carga superficial do material filtrante, quando neutra ou com carga oposta \u00e0 carga superficial das part\u00edculas em suspens\u00e3o, favorece a adsor\u00e7\u00e3o e a condensa\u00e7\u00e3o por contato dessas part\u00edculas na superf\u00edcie.<\/p>\n

\"Efici\u00eancia<\/p>\n

Efeito dos s\u00f3lidos em suspens\u00e3o na efici\u00eancia de intercepta\u00e7\u00e3o<\/strong><\/p>\n

1) Tamanho das part\u00edculas. Quase todos os mecanismos de filtra\u00e7\u00e3o s\u00e3o afetados pelo tamanho dos s\u00f3lidos em suspens\u00e3o. Quanto maior for o tamanho das part\u00edculas, mais f\u00e1cil ser\u00e1 remov\u00ea-las por peneiramento<\/p>\n

2) Forma. A efici\u00eancia de remo\u00e7\u00e3o das part\u00edculas angulares \u00e9 maior do que a das part\u00edculas esf\u00e9ricas, devido \u00e0 sua grande \u00e1rea superficial espec\u00edfica.<\/p>\n

3) Densidade. A densidade das part\u00edculas afeta a taxa de filtra\u00e7\u00e3o principalmente por meio dos mecanismos de precipita\u00e7\u00e3o, in\u00e9rcia e movimento browniano.<\/p>\n

4) Concentra\u00e7\u00e3o. Quanto maior a concentra\u00e7\u00e3o, mais f\u00e1cil \u00e9 a penetra\u00e7\u00e3o e mais r\u00e1pido aumenta a perda de carga.<\/p>\n

5) Temperatura. A temperatura afeta a densidade e a viscosidade e, por sua vez, influencia a efici\u00eancia da filtra\u00e7\u00e3o por meio dos mecanismos de precipita\u00e7\u00e3o e ades\u00e3o. Reduzir a temperatura n\u00e3o \u00e9 ben\u00e9fico para a filtra\u00e7\u00e3o.<\/p>\n

6) Propriedades superficiais. As caracter\u00edsticas de flocula\u00e7\u00e3o e o potencial eletromotriz dos s\u00f3lidos em suspens\u00e3o dependem principalmente das propriedades superficiais. Portanto, as propriedades superficiais das part\u00edculas s\u00e3o fatores importantes que afetam a efici\u00eancia da filtra\u00e7\u00e3o.<\/p>","protected":false},"excerpt":{"rendered":"

Filtration efficiency is the primary index to evaluate the filter medium or filter, which is expressed by the ratio of the mass of solid captured…<\/p>","protected":false},"author":1,"featured_media":5853,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-5852","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\nFiltration Efficiency of Filter Media | Filtration Mechanisms<\/title>\n<meta name=\"description\" content=\"The factors affecting the filtration efficiency of filter media include the properties of filter media and suspended solids.\" \/>\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.alalloycasting.com\/pt\/filtration-efficiency\/\" \/>\n<meta property=\"og:locale\" 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