{"id":3954,"date":"2018-08-05T12:28:53","date_gmt":"2018-08-05T11:28:53","guid":{"rendered":"https:\/\/water.ma\/?p=3954"},"modified":"2019-01-17T23:23:00","modified_gmt":"2019-01-17T22:23:00","slug":"%d8%aa%d8%b5%d9%85%d9%8a%d9%85-%d9%85%d8%ad%d8%b7%d8%a7%d8%aa-%d9%85%d9%8a%d8%a7%d8%a9-%d8%a7%d9%84%d8%b4%d8%b1%d8%a8-%d8%aa%d8%ad%d9%84%d9%8a%d8%a9-%d8%a7%d9%84%d9%85%d9%8a%d8%a7%d8%a9-ro-plant","status":"publish","type":"post","link":"https:\/\/water.ma\/ar\/%d8%aa%d8%b5%d9%85%d9%8a%d9%85-%d9%85%d8%ad%d8%b7%d8%a7%d8%aa-%d9%85%d9%8a%d8%a7%d8%a9-%d8%a7%d9%84%d8%b4%d8%b1%d8%a8-%d8%aa%d8%ad%d9%84%d9%8a%d8%a9-%d8%a7%d9%84%d9%85%d9%8a%d8%a7%d8%a9-ro-plant\/","title":{"rendered":"\u062a\u0635\u0645\u064a\u0645 \u0645\u062d\u0637\u0627\u062a \u0645\u064a\u0627\u0629 \u0627\u0644\u0634\u0631\u0628 \u062a\u062d\u0644\u064a\u0629 \u0627\u0644\u0645\u064a\u0627\u0629 RO plant"},"content":{"rendered":"<p><\/p>\n<div>\n<ul>\n<li style=\"text-align: right\">\u00a0\u062a\u0639\u0631\u0641\u0646\u0627 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\u0627\u0644\u0645\u064a\u0627\u0647 pdf \u0627\u0644\u062a\u0646\u0627\u0636\u062d \u0627\u0644\u0639\u0643\u0633\u0649<\/p>\n<h2 style=\"text-align: right\"\/>\n<h2 style=\"text-align: left\"><span style=\"color: #0000ff\">Examples from desing calculation to ro plant<\/span><\/h2>\n<p style=\"text-align: left\">Assume feed water TDS = 40000 ppm, so Osmotic pressure =30<\/p>\n<h3 style=\"text-align: left\"><span style=\"color: #993300\">:Selection for F.F.P<\/span><\/h3>\n<p style=\"text-align: left\">\u00a0 % (For sea water recovery (20:40<\/p>\n<p style=\"text-align: left\"><span style=\"color: #ff0000\">%so select 30<\/span><\/p>\n<p style=\"text-align: left\">Recovery = Qp\/Qf<br \/>0.3= 1000m3\/d\/ Qf<br \/>Qf = 3000 m3\/d<\/p>\n<p style=\"text-align: left\">Q = A*V From curve \u03b7 = 75%<br \/>P = pghQ\/ \u03b7<\/p>\n<p style=\"text-align: left\">P= 1000*9.8*50*0.0347\/0.75=22.68 kw<\/p>\n<p style=\"text-align: left\">. <span style=\"color: #ff0000\">Assume Head = 50 m<\/span><\/p>\n<p style=\"text-align: left\">so we already make selection for <span style=\"color: #993300\">F.F.P<\/span><br \/>by deter P ,Q<\/p>\n<p style=\"text-align: left\">(Head &gt; ^P (S.F.)+ ^ P (C.F.) + Suction P of <span style=\"color: #993300\">H.P.P<\/span>. + losses + P (Sand filter<\/p>\n<h3 style=\"text-align: left\"><span style=\"color: #993300\">selection for pipeline<\/span><\/h3>\n<p style=\"text-align: left\">Assume water velocity <span style=\"color: #ff6600\">V = 2 m\/sec<\/span><\/p>\n<p style=\"text-align: left\"><span style=\"color: #ff6600\">Q<\/span> = A*V , 0.0347 = 3.14\/4*D\u00b2*2<\/p>\n<p style=\"text-align: left\"><span style=\"color: #ff6600\">D = 0.148 m<\/span><br \/><span style=\"color: #ff6600\">D = 6 inch<\/span><\/p>\n<h3 style=\"text-align: left\"><span style=\"color: #993300\">\u00a0Selection for Sand filter<\/span><\/h3>\n<p style=\"text-align: left\">Assume No. of <span style=\"color: #ff6600\">S.F.= 2<\/span><\/p>\n<p style=\"text-align: left\">V = 0.2 m\/sec<br \/>Q = 0.0347\/2 =0.0174 m3\/sec<br \/>Q = A*V, 0.0174= D\u00b2\/4 *# * 0.2\/60<br \/>D = 2.5<\/p>\n<h3 style=\"text-align: left\"><span style=\"color: #993300\">selection for cartridge filatr<\/span><\/h3>\n<p style=\"text-align: left\">Flow per cart. 10&#8243; =5 GPM= 5\/4.4033 = <span style=\"color: #ff6600\">1.13 m3\/h<\/span><\/p>\n<p style=\"text-align: left\">Assume no. of C.F. = 2 filter<br \/>Q1 = 125\/2 = 62.5 m3\/h=<span style=\"color: #ff6600\">70m3\/h<\/span><\/p>\n<p style=\"text-align: left\">Q1 = no. of cartridge * qc, no. of cart. = 70\/1.13 = 61.6 for cart.10<\/p>\n<p style=\"text-align: left\">For 40 &#8221; no. of cart. = <span style=\"color: #ff6600\">14 cart<\/span><\/p>\n<h3 style=\"text-align: left\"><span style=\"color: #993300\">-:Selection for R.O. membrane<\/span><\/h3>\n<p style=\"text-align: left\">Membrane product = 8 m3\/ d<br \/>No. of membranes = 1000\/8 = <span style=\"color: #ff6600\">125 membrane<\/span><br \/>No. of vessels = 125\/6 = 20.8 =21 vessel + 3 vessel standby<\/p>\n<h3 style=\"text-align: left\"><span style=\"color: #993300\">Selection for flushing pump<\/span><\/h3>\n<p style=\"text-align: left\">Assume vessel need 8 m3\/ h<\/p>\n<p style=\"text-align: left\">Q = 8*24=192 m3\/ hr<\/p>\n<h3 style=\"text-align: left\"><span style=\"color: #993300\">Selection for cleaning pump<\/span><\/h3>\n<p style=\"text-align: left\">Assume each vessel need 5.5 m3\/h<\/p>\n<p style=\"text-align: left\">Q = 5.5*24 = 132 m3\/ hr<\/p>\n<p style=\"text-align: left\">At case 500m3\/ d -2<\/p>\n<p style=\"text-align: left\">Q =A*V\u00a0 70\/3= D\u00b2*3.14*V\/4<\/p>\n<p style=\"text-align: left\">V = 23.3*4\/3.14*2.8*2.8=3.78 m\/ hr<\/p>\n<p style=\"text-align: left\"><span style=\"color: #ff6600\">At case 2x 500m3\/ d<br \/><\/span><br \/>Q =A*V , 140\/3= D\u00b2*3.14*V\/4<br \/>V = 4.6.6*4\/3.14*2.8*2.8=7.5 m\/ hr<\/p>\n<p style=\"text-align: left\"><span style=\"color: #ff6600\">Filtration rate between (10 :25 ) m3\/m2.hr<\/span><\/p>\n<p style=\"text-align: left\">Back Washe rate (20 : 40 ) m3\/m2.hr<\/p>\n<p style=\"text-align: left\">Air filtration rate (40 : 60 ) m3\/m2.hr<\/p>\n<p style=\"text-align: left\"><span style=\"color: #ff6600\">Q=A*V = 240m3\/hr<\/span><\/p>\n<p style=\"text-align: left\">Retention time = Raw water tank volume \/HPP (Q )m3\/hr<\/p>\n<p style=\"text-align: left\">To obtain the power for Pelton wheel<\/p>\n<p style=\"text-align: left\">P1 (pelton) = Q*inlet P* 10.2 \/367<\/p>\n<p style=\"text-align: left\">(Consumed power = pump power (without pelton) \u2013 P1 (pelton<\/p>\n<h3 style=\"text-align: left\"><span style=\"color: #993300\">?\u00a0 \u00a0How to calculate cleaning tank volume<\/span><\/h3>\n<p style=\"text-align: left\">No. of vessels to be cleaned = 8 vessel<br \/>Volume of each vessel = 200 liter<br \/>Empty<br \/>so Min.<\/p>\n<p style=\"text-align: left\">required tank volume = 2*200 =1600 lit<\/p>\n<p style=\"text-align: left\">&#8211; The first 20 % of water is drained = 0.20*1600\/10 = 320 liter<\/p>\n<p style=\"text-align: left\">&#8211; The total capacity = 1600+320 =~2 m3<br \/>So<br \/><span style=\"color: #ff6600\">for tank retention time with respect to pump 5*60\/44 = 6.82 min<\/span><\/p>\n<h3 style=\"text-align: left\"><span style=\"color: #993300\">?How to calculate Raw water tank volume<\/span><\/h3>\n<p style=\"text-align: left\">2&#215;146+2&#215;70+10=442 m3\/h<br \/>Assume retention time = 1.5 hr , tank volume = 1.5&#215;442 =663 m3 ~740 m3<\/p>\n<h3 style=\"text-align: left\"\/>\n<h3 style=\"text-align: left\"><span style=\"color: #993300\">How to calculate Backwash water tank volume<\/span><\/h3>\n<p style=\"text-align: left\">for 500 m\/d unit<\/p>\n<p style=\"text-align: left\">backwash rate = 25-35 m3\/m2.h<\/p>\n<p style=\"text-align: left\">Required water for back wash = 3.14*(2.8\/2)*30 = 184.7m3\/h<\/p>\n<p style=\"text-align: left\">The time required for backwash = 15 min<br \/>So the max.daily water required for backwash (3 filters) =184.7*15*3\/60=<span style=\"color: #ff6600\"><strong>138.5m3<\/strong><\/span><\/p>\n<p style=\"text-align: left\">For 1000 m3\/d unit<\/p>\n<p style=\"text-align: left\">backwash rate = 25-35 m3\/m2.h<\/p>\n<p style=\"text-align: left\">Required water for back wash = 3.14*(2.8\/2)*30 = 184.7m3\/h<br \/>The time required for backwash = 15 min<br \/>&#8211; So the max.daily water required for backwash(5 filters ) =184.7*15*5\/60=230.8m3<br \/>Backwash tank volume = 231+138=369~400 m3<\/p>\n<h3 style=\"text-align: left\"><span style=\"color: #993300\">How to calculate Brine( reject) water tank volume<\/span><\/h3>\n<p style=\"text-align: left\">Reject water = brine water + Backwash water = (92.5*2 + 49*2) + (185) = 476 m3\/h<br \/>Retention time = 15 min<br \/>Tank volume = 476\/60*18=150m3<\/p>\n<h3 style=\"text-align: left\"><span style=\"color: #993300\">How to calculate flushing water tank volume<\/span><\/h3>\n<p style=\"text-align: left\">Say 5 min. for RO (500) &amp;(1000) , 64*15\/2\/60+128*15*2\/60=12+22+91(constant)=150m3<\/p>\n<p style=\"text-align: left\"><strong><span style=\"color: #339966\">by eng\/Ahmed Mahmoud<\/span><\/strong><\/p>\n<\/div>\n<p>\n<a href=\"https:\/\/ro-blog.com\/desing-calculation-to-ro-plant\/\">Source link <\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u00a0\u062a\u0639\u0631\u0641\u0646\u0627 \u0641\u0649 \u0639\u062f\u0647 \u0645\u0642\u0627\u0644\u0627\u062a \u0645\u062a\u0644\u0627\u062d\u0642\u0629 \u0639\u0646 \u0643\u064a\u0641\u064a\u0629 \u062a\u0635\u0645\u064a\u0645 \u0645\u062d\u0637\u0627\u062a \u0645\u064a\u0627\u0647 \u0627\u0644\u062a\u062d\u0644\u064a\u0629 \u0628\u0646\u0638\u0627\u0645 \u0627\u0644\u062a\u0646\u0627\u0636\u062d \u0627\u0644\u0639\u0643\u0633\u0649\u00a0 ro\u0648\u0627\u0644\u064a\u0648\u0645 \u0646\u0643\u0645\u0644 \u0647\u0630\u0647 \u0627\u0644\u0633\u0644\u0633\u0629 \u0628\u0634\u0631\u062d \u062a\u0635\u0645\u064a\u0645 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