Dynamic Simulation Study on Anti-Scaling Corrosion Inhibitors of Circulating Cooling Water for Thermal Power Plants

Abstract

In order to choose one elixir from three anti-scaling inhibitors A, B and C that most suits for the circulating cooling water in thermal power plants under certain water condition, we used the dynamic simulation test method in this paper. Under high concentration rate (4.0), we comprehensively analyzed the three elixirs from the factors of their anti-scaling, corrosion and economical performances. According to the results, it was confirmed that elixir B displayed the relevant good properties for the water condition of the power plant. Meantime, the elixir components of the three elixirs were analyzed, and the results showed that all the indexes of them were in conformity with the national standards.

Optimization on Microbial Anti-Scaling and Corrosion Inhibition Technology for Low Alkalinity and Low Hardness Circulating Cooling Water in Thermal Power Plants

“…Numerical optimization research results indicate that when nutrient solution quantity, bacterial agent dosage, and aeration volume are set to 0.3‰, 0.5‰, and 1 L/min, respectively, the comprehensive effect of microbial technology on scale inhibition and corrosion inhibition is optimal (expected utility value = 0.939), representing the best operating conditions for this technology. Under these operating conditions, the predicted values for water calcium hardness level, brass corrosion rate, and stainless steel 304 corrosion rate are 14.62 mmol/L, 1.10 μm/a, and 0.68 μm/a, respectively, with the expected values for brass and stainless steel 304 corrosion rates significantly lower than the relevant national standards in China (< 5 μm/a) [13]. Therefore, microbial scale inhibition and corrosion inhibition technology provide an efficient and feasible technical solution for treating low-alkalinity and low-hardness thermal power plant circulating cooling water, and the results of this study can provide theoretical references for optimizing and controlling the technical application process.…”