Everyone knows that FNV TYPE AIR COOLED CONDENSER is a kind of heat exchange equipment that works well, and liquid needs to be in the tube bundle during heat exchange. Under normal circumstances we call it cooling water, and its selection is also an important process, and it is also introduced in detail below.
The function of the FNV TYPE AIR COOLED CONDENSER circulating water system is to send cooling water (seawater) to the upper and lower pressure condensers to cool the exhaust steam of the high-pressure cylinder of the steam turbine, so as to maintain the vacuum of the upper and lower pressure condensers, so that the circulation of steam and water can be continued. In addition, it also supplies water to the open water system and the ash flushing system.
1. Try to use soft water or treated industrial circulating water, mainly to prevent scaling, so as not to affect the heat transfer effect. Calcium ions should be controlled at 50-80mg/L, magnesium ions should be controlled at 40-80mg/L, and bicarbonate ions should be controlled at 50-80mg/L. At 100-150mg/L, the content of chloride ions in circulating water.
2. Chloride is prone to stress corrosion on stainless steel. If the content is too high, it will cause pitting corrosion on the plate, causing oil-water mixing and circulation. The sheet material of less than 300mg/l can choose 316L.
3. The applicable range of stainless steel 304, 316L is water, river water, oil and other common inorganic and inorganic media. FNV TYPE AIR COOLED CONDENSER can be used for various concentrations of carbonic acid, ammonia, and alcohol at ≤100°C. It has poor corrosion resistance in sulfuric acid and hydrochloric acid, and is especially sensitive to leaky corrosion caused by chlorine-containing media. 316L has better corrosion resistance.