| 摘要 |
A tubular ceramic column (1) locates over an outlet nozzle (2) in a melt-containing vessel. Lower part of column (1) comprises two galleries, separated by weir (3). Up-feed gallery (4) has inlet orifice (5) near vessel floor for liquid to enter. Down-feed gallery (6) passes directly into outlet nozzle (2). Pressurised gas is fed into upper chamber (7) via supply hose (10) located in fittings (8) sealed into top of column. Chamber (7) may also be vented to atmosphere as desired. Interaction between outflow and input upon gas confined in chamber (7) results in a self-regulating condition so that column height in down-feed gallery (6) remains stable at any given height. Outflow rate is instantly altered by adjusting column height in down-feed gallery (6); this is achieved by increasing or decreasing system pressure. The column completely drains in halting outflow; this makes for ease of re-start after long halt times. <IMAGE> |
