Romanian coal-fired power station meets national pollution directives with  flexible and scalable DCS solution from Rockwell Automation

A large combined heat and power (CHP) plant in Iași, Romania needed to meet new So2 emission limits. Two of the plant’s 420 T/hr steam boilers still operate on pit coal, with a fuel oil back up, and the plant  took this project as an opportunity to upgrade the entire control infrastructure for the power-generation system. For this project it employed Romanian company Elsaco Electronic SRL – a member of the Rockwell Automation PartnerNetwork™.

The CHP plant needed to deploy a new flue gas desulphurisation (FGD) solution in the two boilers’ shared smokestack, which would better manage the SO2 levels, while also undertaking a number of other improvements, such as refurbishing water boilers, electrostatic precipitators, pumps & transfer systems and the installation of low-NOx burners.

The target of this process was to reduce the SO₂ concentration from 2,190 mg/m³ STP dry basis to 50 mg/m³ STP dry basis and to reduce the solids content from 50 mg/Nm³ on 6% dry basis to less than 20 mg/Nm³ on 6% dry basis in the cleaned flue gas.

The new FGD plant comprises a circulating fluidised bed (CFB) reactor, a fabric filter, a booster fan and multiple auxiliary systems.

The target of this process was to reduce the SO₂ concentration from 2.190 mg/m³ STP dry basis to 50 mg/m³ STP dry basis and to reduce the solids content from 50 mg/Nm³ on 6% dry basis to less than 20 mg/Nm³ on 6% dry basis in the cleaned flue gas.

The PlantPAx® DCS from Rockwell Automation is deployed for control of the FGD System.