A DEVICE FOR PROTECTION OF AN ANTENNA OF BLAST FURNACE STOCK LEVEL RADAR SYSTEMS TO REDUCE MALFUNCTIONING FREQUENCY OF THE RADAR SYSTEM OPERATING UNDER HARSH CONDITIONS

摘要

A device for protection of an antenna of blast furnace stock level radar systems to reduce malfunctioning frequency of the radar operating under harsh conditions, the device comprising an insulated cooling cabinet mounted over the radar flange to protect the radar electronics; a spool piece for protuberant orientation of the radar antenna provided with means for purging insert gases; and a ball valve assembly disposed at a predetermined distance for isolation of the radar from the harsh process conditions inside the blast furnace, wherein the predetermined distant (LAllowed) of the ball valve (BV) is selected based on the radius of the ball valve (RBV), sourcing angle of the microwave (θDispersion) generated by the radar in respect of vertical, length of the antenna (Lantenna), and internal diameter of the flange (Flange ID), wherein the distance allowed (LAllowed) = RBV x COT(θDispersion/2), wherein RBV = {(Lantenna + 2ΦFlangeID) x TAN (θDispersion/2)}, and wherein the θDispersion is between 6° to 8° from the vertical.