GGH ELEMENT

Gas gas heater (GGH in short) is a heat exchanger used in power plant to heat treated flue gas (40-50℃) with raw flue gas (130-150℃) in FGD system. GGH plays dual function: flue gas cooling and reheating. Raw flue gas is cooled down by GGH. If hot flue gas enters FGD tower, it would cause damage to anti-corrosion coating inside FGD tower. And a lower temperature is good for the absorption of SO2.
Since it works in harsh environment long time, high corrosion resistance of heat element is requested. Manufacturers usually adopt decarburized steel and wet static electricity method for double enameling to solve this problem.

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