| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To surely prevent the flow of sulfuric acid toward a rear stage while being entrained in gas, and to suppress the increase of pressure loss. <P>SOLUTION: The drying tower is provided with a sulfuric acid supply nozzle 1 for bringing gas A into contact with sulfuric acid, and a gas-liquid separation part 3 disposed in the downstream of the gas flow from the sulfuric acid supply nozzle 1 and separating the gas A from the sulfuric acid entrained in the gas A. The gas-liquid separation part 3 has demisters 3b, 3c packed with packings in the gas A flow path in this order. Thus, sulfuric acid entrained in the gas A is sufficiently collected by the demisters 3b, 3c to surely prevent the flow of the sulfuric acid toward the rear stage while being entrained in the gas A. By setting a packing density in the demister 3b lower than that in the demister 3c, deposit such as simple substance of sulfur can be coarsely taken out by the demister 3b on the upstream side of the gas flow causing little impairment of gas permeability due to the lower packing density, thus causing little impairment of gas permeability in the demister 3c downstream of the gas flow, to suppress the increase of pressure loss. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
