| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent a gas supply pipe to a column and a peripheral part thereof from becoming corroded and thereby enable a device to be operated continuously for a long time by fitting a tantalum sleeve to the inner wall of the gas supply pipe on the column with a water spray means having water spray holes installed at the internal upper part and the gas supply pipe installed at the lower part. SOLUTION: A water spray device 3 is installed at the inner upper part of a column 1. In a gas supply pipe 5, a water supply pipe 7 made of tantalum with a spray nozzle 8 or the like fitted at the tip, is installed. A dry gas containing hydrogen chloride is supplied to the gas supply pipe 5 and then is supplied into an absorption column 1 while the gas is cooled by water sprayed from the spray nozzle 8 after being fed from the water supply pipe 7. In this case, a tantalum sleeve 6 is mounted in the gas supply pipe 5 so that the corrosion of a material for piping is inhibited and at the same time, the gas supply pipe 5 is protected against a hot gas. After this procedure, the gas is brought into counter-contact with the spray in the absorption column 1 to cool/absorb the gas. On the other hand, the water absorbing the hydrogen chloride is unloaded from a line 10 and then is circulated for use.</p> |
