improved reliability of high-avt (high-ph water treatment for sale

improved reliability of high-avt (high-ph water treatment for sale
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  • What is high AVT water treatment?
  • In High-AVT operation, the boiler water can be stored under the same water condition as in operation, and the simplification of stop/start-up process and the reduction of the amount of pure water used can be expected. 4. Steps for introducing High-AVT (LO) water treatment to HRSG
  • Is AVT a new water condition?
  • Therefore, AVT (LO) (Low oxidizing condition) is set as a new water condition. Table 4 shows a comparison of the conventional phosphate treatment and the High-AVT water treatment. It has been verified that at a high pH, the tube thinning rate by FAC is reduced, and the inhibition effect has been expected.
  • What is a normal AVT pH?
  • A typical AVT guideline is to maintain a pH of about 9.3–9.6 and the dissolved solids concentration to less than 2 ppm in the feedwater entering the boiler. The ammonia concentration typically ranges between 0.5 and 2 ppm as required to maintain the desired pH. 6 There are some inherent problems associated with using AVT.
  • What is high-AVT?
  • High-AVT is an all-volatile treatment method for feedwater with a pH level exceeding the Japanese feedwater quality control standards (upper limit: pH 9.7) provided by JIS B 8223:2006, and is mainly used in nuclear power plants. Figure 6shows the relationship between pH levels and flow-accelerated corrosion (FAC) rates (dissolution of iron).