Advanced ESP Designs for Black Liquor Recovery Boilers, 2013 PEERS Conference

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This paper discusses advanced designs for black liquor recovery boiler ESPs. Using only commercially proven technologies such as Southern Environmental’s customized current distributing rigid discharge electrodes and NWL’s PowerPlus™ Switchmode power supply (SMPS) sets, it is demonstrated how a stringent stack PM emissions standard of 0.010 grains/dscf at 8% O2, at conditions of 70% design flow through one chamber of a dual chamber ESP, can be achieved with an advanced ESP design that has 48% less collecting plate area and 21% lower installed cost than a conventional retrofit ESP. The superior PM emissions performance and lower installed costs associated with advanced ESP designs are discussed when retrofitting a new ESP and also when rebuilding an existing ESP.