Three-page bulletin in PDF form from ABB describes how accurate positioning of air dampers, louvers, and diverters by pneumatic actuators can improve boiler efficiencies. The document states that accurate positioning is essential to ensure compliance with increasingly stringent regulations governing plant emissions.
The document notes that inadequate excess air results in unburned combustibles, producing soot, smoke, and carbon monoxide. Too much air results in heat lost due to the increased flue gas flow lowering the overall boiler fuel-to-steam efficiency. The use of Digital Positioning Technology ensures accuracy while providing advanced diagnostics and predictive maintenance information.
Page 2 offers illustrations of UP (Universal Pneumatic) and LP (Linear Pneumatic) actuators designed to precisely position final control elements based on the setpoint from a control system. Included are torque specifications and, in the case of linear models, cylinder sizes.
ABB is a leader in power and automation technologies that enable utility and industry customers to improve performance while lowering environmental impact. The ABB Group of companies operates in around 100 countries and employs about 124,000 people.
SOURCE: ABB Measurement & Analytics