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Register a new userLimiting corrosion which formed by cooling water in jebessa gas factory
الحد من التآكل الناتج عن مياه التبريد في معمل غاز الجبسة
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يعالج هذا البحث الحد من التآكل و الترسب المتشكل في الأوساط المائية الآكالة عن طريق إضافة موانع تآكل و ترسب مثل كربونات الزنك و حمض هيدروكسيل ايتيلين دي فوسفوريك إلى الماء. تتجلى مشاكل التآكل و الترسب بشكل كبير في مجال هيدروليك الموائع , مثلا عند استخدام أوساط مائية آكالة للمعادن و غير معالجة ب موانع تآكل في دارات التبريد فان احتمال تشكل مناطق تآكلية و ترسبات تكون عالية, حيث يتآكل معدن الفولاذ و النحاس في دارات التبريد عند التماس مع الوسط المائي الحاوي مكونات آكالة مثل غاز الأوكسجين , أحادي اوكسيد الكربون , غاز الكلور وشوارد الكلوريد المنحل. تتمثل الحماية من التآكل عن طريق تشكيل غلاف HEDA و شوارد الزنك التي ما تلبث أن تتفاعل مع مكونات الوسط المائي الأكال , أما الحماية من الترسب تتجلى بتشكيل معقد مع الكالسيوم والمغنزيوم ذي انحلالية مرتفعة في الماء مع ارتفاع درجة الحرارة
This invention relates to process for preventing both corrosion and the formation of scale in water- conducting systems which comprises adding a zinc carbonate and hydroxyl ethylene diphosphoric acid (HEDA) to water. The main problems arising in hydraulic engineering, e.g. when untreated water for cooling purposes are the occurrence of corrosion and the formation of scale. The corrosion of metals such as steel, copper and alloys of these metals which commonly used for water circulation tanks is mainly due to the action of oxygen, carbon dioxide ,chloride gas , chloride ions and many others ions dissolved in the water. The prevention of corrosion by forming thin film of complex HEDA and zinc ions which actions with corrosion ions while the prevention of scale by forming heat stable soluble complexes with calcium and magnesium.
References used
RAYMOND,F1987-asmmetal handbook,vol13.asm international, USA ,p3455
SHREIR,L 2000- corrosion1, vol1.great Britain, British,P1432
SHREIR,L 2000- corrosion2, vol3.great Britain , British, P1478
MITCHELL,W 1994 -cooling tower iustitute annual meeting. Hosten, texas , USA
WILSY,C 1997 alternative water treatmaint for cooling towers ashrae journal, april ,p. 43-46
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This study aims to use the ash formed from the burning of firewood and the different
pruning residues to remove the hardness of water
Soda ash was characterized using different techniques, including XRD,flame
spectroscopy , volume titration and ot
hers.
These methods aim to determine the composition of the ash and the components
which are contributing to the removal process.
The optimum mixing time was determined using certain amount of soda ash to the
hard water and the water hardness was determined in the rang of time (0.5, 1, 2, 3, 4 and
5h) where the ideal time was 3 hours.
The removal ratios were determined when the mixing time of the two phases was 3
h, and adding directly the following quantities of ash (0.5,1,2,3,5,7,10,15,20,25) g to 200
ml of highly hardened water. The removal rate was increased by increasing the amount of
added ash. The removal rate was approximately 50% when 1 g of ash was used and the
complete removal rate of 100% was achieved when the amount of ash was 25 g.
This research aims to study the reduction of air heaters corrosion in
steam boilers and increasing their efficiency , by the application of
combined heating of air by steam and exhaust gases.
The experimental data of this research demonstrates tha
theater
corrosion could bereduced by maintaining the exhaust gases
temperature above the dew point of sulfuric acid depending onthe
amount of sulphur in the fuel oil ,by controlling air heat temperature
by steam.Which increases the boiler efficiency as a consequence of
reducing the fuel consumption by 9% as a maximum , reduces heat
loss, minimizes maintenance costs and reduces the time of emergency
shutdowns.
حسابات حمل التبريد، العوامل المؤثرة على اكتساب الحرارة، الحرارة المكتسبة, الحرارة المنتقلة خلال المبنى, الحرارة المكتسبة من الشمس, حرارة الإضاءة, حرارة المعدات والموتورات، الحرارة المكتسبة من الأشخاص, حرارة التهوية, الحرارة المكتسبة خلال المسالك الهوائية والمزيد.
This research was aimed to assess the pollution from Tartous Cement Factory of
some heavy metal by using of the bark of olive trees and Lichens as Bio-indicators. The
olive trees was chosen as that predominant vegetation type in the study area. Bar
k samples
of olive trees and the lichens were collected from several villages surrounding the Cement
Factory at different distances (1-2-3-4-5-6-7) km from the center of the Cement Factory in
the eastern and north-eastern region of the Cement plant (where the prevailing winds in the
region is western and southern Western).
The results showed that the concentration of heavy elements in the bark of olive trees
and lichens (ppm) take the same trend even thought there are differences in concentration
between them by the overall average for all sites was as follows: iron > manganese >
copper > lead. We note the high concentration of iron in bark of olive trees compared to
lichens, but the rest of the elements it was statistically identical. The results also showed a
significant correlation between the concentrations of manganese element in each of the
bark and Lichens, and the existence of a negative correlation between the concentration of
manganese and distance for both Lichens and bark. Concerning the altitude above sea level
the results showed existence of significant and negative correlation with all of Iron,
Manganese and Lead in Lichens.
In this paper, the seasonal variations of CO2 system and pH
values in surface seawater of Banias city are shown during the
period in spring 2015 and winter 2016, in addition to determine the
impact of hydrological factors.
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