AN AUTO PURGING SYSTEM FOR SKIRT PRESSURE IMPULSE LINES IN LD CONVERTORS OF STEEL PLANTS.

摘要

ABSTRACT TITLE: AN AUTO PURGING SYSTEM FOR SKIRT PRESSURE IMPULSE LINES IN LD CONVERTORS OF STEEL PLANTS. The present invention relates to auto purging system for skirt pressure impulse lines in LD Convertors of Steel Plants for controlled auto purging of the tapping points of impulse pipes for measuring Skirt Pressure, positioned at the peripheral of lower portion of hood in circular circumference 45 deg apart to each other involving high pressure nitrogen back purging automatically after each blow and slag splashing, thus not allowing dust to be settled at the mouth of the impulse lines preventing it from choking. The new system is not only more efficient and clean, but has replaced manual purging as a reliable, more ergonomic and speedy alternative. The system employs PLC based control of auto purging of impulse lines favouring correct measurement of Skirt pressure for controlling damper movement which in turn controls the draught in Gas duct of Gas Cleaning Plant required for suppressed combustion in LD Convertor Shop. (Figure 1)