Iranian Chemical Engineering Journal

Iranian Chemical Engineering Journal

Providing Operational Solution to Reduce Water Consumption of Cooling Water Cycle in Montazer Ghaem Power Plant by Chemical Modification of Clarifier Water

Document Type : Original Article

Authors
Majid Ghahraman Afshar 1
M. R. Azimi 2
N. Habibi 2
M. Esmaeilpour 3
1 Assistant Professor, Chemistry and Process Research Department, Niroo Research Institute (NRI), Tehran, Iran
2 MSc. in Chemistry, Chemistry Depatment, Montazer Ghaem Power Plant
3 Assistant Professor of Chemistry, Chemistry & Research Process Depatment, Niroo Research Institute (NRI)
10.22034/ijche.2023.405752.1331
Abstract
Based on the previous experiences of the experts of the chemistry department of Montazer Ghaem power plant, the recovery of blowdown water to the cooling tower water doubles the water conductivity of the cooling tower water and increases the sedimentation rate. Increasing the conductivity as well as the deposition rate leads to acceleration and intensification of corrosion processes that must be controlled and prevented. In this proposed project, the main aim is to provide solutions such as adding coagulants, as well as determining the optimal concentration of reagent, reducing the conduction rate and water deposition factor of the clarifier water. Therefore, by controlling the conductivity and sedimentation rate of the clarifier water, it is possible to control and prevent the corrosion rate of the cooling tower water. According to the experimental data, the optimum chemical condition is obtained in the amount 80 ppm CaOH, 15 ppm FeCl3, 25 ppm Na2CO3 and PAC as the best coagulant in 5 ppm concentration range. The retention time in this test is 50 minutes, which is performed with a fast cycle and a slow cycle. The time of 40 seconds is the initial time to complete the reaction of CaOH and Na2CO3 in water. In these values, the chemical conditions of the water were optimized and the turbidity is reached a value around zero. In the optimization step, the COD of clarifier water is changed within the range of 1 to 40 ppm, while the BOD (Biological Oxygen Demand) value of clarifier water and raw water are kept constant at zero level.
Keywords
Montazer Ghaem Power Plant
Recovery of Blowdown
Water Treatment
Poly Aluminum Chloride (PAC)
Modifying Pattern of Water Consumption
Subjects
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Iranian Chemical Engineering Journal
Volume 25, Issue 144
May and June 2026
Pages 8-21