پديد آورنده :
نجفي سمناني، مطهره
عنوان :
ارتقا كيفيت آب شستشوي مستعمل واحد اسيد شويي مجتمع فولاد مباركه به روش تعويض يوني
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
فرآيندهاي جداسازي
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده مهندسي شيمي
صفحه شمار :
دوازده، 66ص.: مصور، جدول، نمودار
يادداشت :
ص.ع. به فارسي و انگليسي
استاد راهنما :
محمد چالكش اميري
توصيفگر ها :
رزين تعويض يوني , تصفيه ي پساب , هدايت الكتريكي , ورقه هاي فولاد
تاريخ نمايه سازي :
28/2/94
استاد داور :
حميد زيلويي، علي اكبر دادخواه
تاريخ ورود اطلاعات :
1396/09/27
رشته تحصيلي :
مهندسي شيمي
چكيده انگليسي :
67 Upgrading Used the Rinse Water in Pickling Unit by Ion Exchange Resins Method Motahare Nadjafi Semnani m nadjafi@ce iut ac ir Date of Submission Department of Chemical Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Farsi Dr Mohammad Amiri amir33@cc iut ac ir AbstractOne of the significant today s concerns is the problems wastewater generated by variousindustries Steel industry is one of the most consumer of water Restoring or purifyingwastewater of such industries can save a huge volume of water One of the most goodcandidates for water saving in steel industry is final rinsing water at pickling unit In MobarakeSteel Complex unit the steel pieces are washed by DM water after acid pickling to remove alltraces of impurities on the surface of steel pieces The pure rinse water is polluted with thelatest remained acid and iron chloride scales and discharged as wastewater with electricalconductivity about 16000 to 55000 S cm and pH about 0 55 to 1 3 The volume of thiswastewater is about 20 25 cubic meter per hour The main purpose of this experimental workwas to purify and recycle this wastewater to pickling unit by ion exchange method To removeFe II ion from this wastewater two methods were used cationic resin and neutralization withcaustic soda methods For further treatment an advanced resin method called APU withweakly basic anion resin has been employed During this experiment hydrochloridric adsorbedby resin and iron chloride discharged from resin bed During this research the effect of pH electrical conductivity have been investigated Optimum residual time of operation was 5minute Optimum ratio of wastewater volume to resin volume 3 to 2 and the volume of waterof resin regeneration was about 1bed volume The recovered water of this research has EC lessthan 300 S cm and its iron concentration is less than 300ppm while its pH is about 6 Thisrecovered water had requirement condition of pickling unit of Mobarake Steel Complex In thenext step of this research the combination method of using neutralization and anionic resin hasbeen examined In first step neutralization by adding caustic soda 100 of iron hadprecipitated and acidity was removed The final results shows that using this combinationmethod produced water with electrical conductivity about 30 S cm and pH about 7 5 such adesirable quality that can be recycled in pickling unit The combination method had betterresults but required caustic soda for regeneration and more water was consumed duringregeneration Keywords Ion exchange resin waste water treatment electrical conductivity pickling unit of Mobarake Steel Complex steel sheets
استاد راهنما :
محمد چالكش اميري
استاد داور :
حميد زيلويي، علي اكبر دادخواه
