石英砂濾料是采用天然石英礦石,經破碎、篩選、水洗、烘干、二次篩選而成,顏色純白雜質含量小,機械強度高,截污能力強,化學性能穩定,是凈水處理的理想材料.其價格低廉,使用周期較長,機械強度高,不易破碎,天然(ran)(ran)石英(ying)砂(sha)比-的破粹石英(ying)砂(sha)使用周期長3—8倍,且濾后水質穩定,相對(dui)而(er)言,天然(ran)(ran)石英(ying)砂(sha)更為(wei)低廉耐用.
正向過濾的雙層濾料和三層濾料是在正向過濾的條件下,根據理想濾層的概念,用天然材料所構成的濾層.雙層濾料是由上層的蘇麗無煙煤濾料和下層(ceng)(ceng)(ceng)的(de)細(xi)粒石(shi)(shi)(shi)(shi)英(ying)砂(sha)構成的(de).由(you)于無(wu)(wu)煙(yan)煤(mei)(mei)濾(lv)(lv)(lv)(lv)料(liao)(liao)(liao)(liao)(liao)(liao)(liao)的(de)密(mi)度(du)比石(shi)(shi)(shi)(shi)英(ying)砂(sha)小(xiao),在(zai)反(fan)沖(chong)洗(xi)后(hou)無(wu)(wu)煙(yan)煤(mei)(mei)濾(lv)(lv)(lv)(lv)料(liao)(liao)(liao)(liao)(liao)(liao)(liao)層(ceng)(ceng)(ceng)仍(reng)然保(bao)持(chi)在(zai)石(shi)(shi)(shi)(shi)英(ying)砂(sha)層(ceng)(ceng)(ceng)上(shang)面(mian)(mian),就整(zheng)體來(lai)說(shuo),雙(shuang)(shuang)層(ceng)(ceng)(ceng)濾(lv)(lv)(lv)(lv)料(liao)(liao)(liao)(liao)(liao)(liao)(liao)體現了水先通過粗(cu)粒濾(lv)(lv)(lv)(lv)料(liao)(liao)(liao)(liao)(liao)(liao)(liao)后(hou)通過細(xi)粒濾(lv)(lv)(lv)(lv)料(liao)(liao)(liao)(liao)(liao)(liao)(liao)的(de)理想(xiang)(xiang)濾(lv)(lv)(lv)(lv)層(ceng)(ceng)(ceng)概(gai)念.但(dan)是(shi)(shi)在(zai)無(wu)(wu)煙(yan)煤(mei)(mei)濾(lv)(lv)(lv)(lv)料(liao)(liao)(liao)(liao)(liao)(liao)(liao)層(ceng)(ceng)(ceng)和石(shi)(shi)(shi)(shi)英(ying)砂(sha)層(ceng)(ceng)(ceng)本身內,仍(reng)然不能避免(mian)反(fan)沖(chong)洗(xi)是(shi)(shi)的(de)分(fen)級作用(yong).因此可以說(shuo),雙(shuang)(shuang)層(ceng)(ceng)(ceng)濾(lv)(lv)(lv)(lv)料(liao)(liao)(liao)(liao)(liao)(liao)(liao)是(shi)(shi)由(you)兩層(ceng)(ceng)(ceng)分(fen)級濾(lv)(lv)(lv)(lv)料(liao)(liao)(liao)(liao)(liao)(liao)(liao)所構成的(de),在(zai)整(zheng)體上(shang)具(ju)有理想(xiang)(xiang)濾(lv)(lv)(lv)(lv)層(ceng)(ceng)(ceng)概(gai)念的(de)濾(lv)(lv)(lv)(lv)層(ceng)(ceng)(ceng).三層(ceng)(ceng)(ceng)濾(lv)(lv)(lv)(lv)料(liao)(liao)(liao)(liao)(liao)(liao)(liao)是(shi)(shi)沿著雙(shuang)(shuang)層(ceng)(ceng)(ceng)濾(lv)(lv)(lv)(lv)料(liao)(liao)(liao)(liao)(liao)(liao)(liao)思路,追求理想(xiang)(xiang)濾(lv)(lv)(lv)(lv)層(ceng)(ceng)(ceng)的(de)結果(guo).三層(ceng)(ceng)(ceng)濾(lv)(lv)(lv)(lv)料(liao)(liao)(liao)(liao)(liao)(liao)(liao)是(shi)(shi)在(zai)無(wu)(wu)煙(yan)煤(mei)(mei)層(ceng)(ceng)(ceng)和石(shi)(shi)(shi)(shi)英(ying)砂(sha)層(ceng)(ceng)(ceng)的(de)下面(mian)(mian),加(jia)設一(yi)層(ceng)(ceng)(ceng)密(mi)度(du)比石(shi)(shi)(shi)(shi)英(ying)砂(sha)大,力度(du)比石(shi)(shi)(shi)(shi)英(ying)砂(sha)小(xiao)的(de)濾(lv)(lv)(lv)(lv)料(liao)(liao)(liao)(liao)(liao)(liao)(liao)構成的(de).這zui下一(yi)層(ceng)(ceng)(ceng)一(yi)般用(yong)石(shi)(shi)(shi)(shi)榴石(shi)(shi)(shi)(shi)濾(lv)(lv)(lv)(lv)料(liao)(liao)(liao)(liao)(liao)(liao)(liao)、磁(ci)鐵礦濾(lv)(lv)(lv)(lv)料(liao)(liao)(liao)(liao)(liao)(liao)(liao)等為材料(liao)(liao)(liao)(liao)(liao)(liao)(liao).
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