Experimental Analysis And Research Of Scaling And Scale Prevention In Condenserin A Power Plant

The water used in the circulating cooling aqueous system has reached 30% to 50% of the total amount of water used in the thermal power plant; therefore, it’s a very important step to handle the water used in the circulating cooling aqueous system the for saving water resource and promoting electric development. Promoting the concentration percentage is the most effective method for saving water in present. However, there would be a serious problem while promoting the concentration percentage, that is, water recovery condenser, which is the main part in the circulating cooling aqueous system, would be decayed and scaling. In order to improve the concentration rate and conservation, while ensuring a secure economic operation of condenser, the power plants are actively improving the circulating cooling water treatment technologies. Because of its high rate of concentration of pharmaceutical co-scale and water efficiency, weak acid cation exchange process begins in the most obvious advantages of the use of thermal power plants.A power plant’s circulating cooling aqueous system in Inner Mongolia is using that part of water classic weak acid ionic exchange processing to throw jointly adds the antisludging method, but which made the water recovery condenser scaled and decayed seriously. In order to ensure that the power plant cooling water system to the high concentration ratio in the safe and stable operation, and the safe operation of steam equipment, operation parameters must adjust the cooling water system. Combined with the scaling and decayed water recovery condenser, and the low concentration percentage existing in the system, and after analyzing the decay and testing the system’s movement, this article finds out the reason, and then researches the main factors of scaing and decaying through the static test, the kinetic simulator experimented and revolving the lacing film corrosion test, that is, the water proportion, the medicament type and the added quantity in the circulating cooling aqueous system are researched in 6 test combinations of the static test, rotating hanging strip test and dynamic simulation.The experiment shows that after the static test, the kinetic simulator experimented and revolving the lacing film corrosion test, combination tests b is best suited to the plant circulating cooling aqueous system, and which can effectively alleviate the corrosion problems. When the weak acid ion water and the Yellow River water’s ratio is 6:4, and 2# pharmaceutical concentration is 12mg / L made by the HEDP, HPMA, HEDP compound, the dynamic simulation run-time has its limits concentration ratio can reach 4.69 times, and the dirt thermal resistance increases slowly, meanwhile the condenser pipe isn’t corroded. Through the simulating test of the related factors, this experiment solves the condenser tube corrosion in the application of weak acid ion exchange process combined pharmaceutical dosage scale in a power plant in Inner Mongolia, and meanwhile, combining with practical operation of the plant proposes some suggestions about operational controling、dosing and up water、discharging pollutions、and the way of turning on and off the machine, and also to other plants which also use this technology about the research on the scale control corrosion.