High pressure fluid cleaning method - involves using equation with deviation detected to selectively halt operation

摘要

The method monitors the nozzles in a high-pressure cleaning system, where more than five nozzles are grouped together and supplied by a common pipe (9). Pressure and rate of flow in the pipe are continuously measured, and compared with those obtained in a calibrating run and stored. From the values obtained in the calibrating run an equation is defined of Q = c.f(p) where Q is the flow rate p is the pressure and c is a characteristic factor for the nozzles. The momentary measured values of p and Q are processed, and where there is a discrepancy of more than 1 percent between the value of c and that obtained from the calibration run a fault is indicated or prodn. is stopped. ADVANTAGE - Early detection of even slightly choked nozzle.