Pressure Compensation and Correction for Differential Pressure Water Level Gauge of Sub-critical Drum Boilers

To reduce the influence of boiler pressure on indicating value of the differential pressure drum level gauge in sub-critical power units, an analysis has been performed on the working principles of differential pressure water level gauges, thus obtaining the rule of violent changes in indication due to pressure fluctuation. Corresponding adjustment methods are proposed, so as to prevent any full and lack of water accidents, which is of great significance in keeping safe and stable operation of the boiler.