Annual Report 2001-2002

NRI Annual Research Report 2001-2002Project Title:Hydrazine Omitting or Substitution by Non-toxic Materials inProtection Operation of Power Plant’s Equipment from CorrosionDepartment: Chemistry & Process Project Manager: A. AhmadiContractor: Niroo Research Institute Project Code: PPCPN02Project Staff: M. Ghadimi, M.S. Ahadi, S. EmamiSummary:Since 1950 Hydrazine has been the most popular chemical for removal of residualoxygen from boiler feed water. Hydrazine has the particular advantage that itsbreakdown products are volatile and therefore do not contribute to TDS in the boiler.But the rate of Hydrazine reaction with dissolved oxygen in the low pressure feedsystem is slow and toxic. The main purpose of this project is the determination of nontoxicchemicals for substitution of Hydrazine in power plants steam cycle. Inassessment of various chemicals the some practical aspects such as cost, availability,handling and storage, health risks and analytical monitoring for dosing control havebeen considered.−Project Results:Gathering Statistical information from power plants chemical conditioningand Hydrazine annual consumption.Determining and reducing of dangers of hydrazine usage in industry forpersonnel.Determining and reducing of dangers of hydrazine usage in industry forpersonnel.Determining essential condition for omitting hydrazine usage from chemicalcontrol programs industry by use of Alternative chemical conditioning programs.Determining suitable chemicals for hydrazine substitution.Designing and developing prototype for assessment of substitute chemicalsvia test in simulated conditions (pilot plants).Project Documentation:Chemistry & Process Department; Report of “Chemical conditioningprograms in Iran’s power stations”; Chemistry & Materials Research Center; NRI;September 1998; Code: PPCPN02/T01.56