Flue Gas Desulphurisation (FGD)

Flue Gas Desulphurisation in Coal Power Plants

Coal-fired Power Stations

Large gas to gas (air to air) heat exchanger built up air volumes more than 1 million m3 per hour

The GUPEX® gas to gas plate heat exchangers are designed for lower-range temperature areas of flue gasses from coal fired power station processes. The air air (gas gas) plate heat exchanger is a very good alternative to the rotating heat exhangers. And with no moving parts and with its excellent chemical resistance the plate heat exchanger improves efficiency and pay-back time and reduce the cost.

Untreated flue gas enters at 100 - 150°C and is cooled down to 70 - 100°C, which is below the acid dew point. The clean gas enters saturated with moisture at 45 - 50°C and is re-heated to typically 75 - 90°C to give the outlet gas the buoyancy required to lift it through the chimney. The flue gas at this stage typically contain fly ash, condensing acid, water with a high chlorine content, unbleacted limestone, remnants of SO2 and SO3 etc. The use of a corrosion resistant high temperature resistant vinylester plate heat exchanger can remove the need for large rotating heat exchangers which typically are made of coated or enamelled steel.

GUPEX gas-to-gas plate heat exchanger in FGD process

Since the GUPEX® gas to gas plate heat exchanger has no moving parts there will be no air leakage caused by the design of the heat exchanger, so no cross contamination of gas flows will occur.

The GUPEX® air to air (gas to gas) plate heat exchangers are scaleable to suit air and gas volumes from flue gasses in coal fired power stations (up to several million m3 per hour, or more than 1 million cfm).