| 摘要 |
PURPOSE:To measure automatically the concentration of a pickling liquid by constituting a device so that a filter, which is provided in a duct from a continuous pickling tank of steel bands, is prevented from being clogged with sludge. CONSTITUTION:A sample liquid has coarse refuse eliminated by a primary filter and is sent to a secondary filter 4a or 4b and has sludge eliminated, and the clean sample liquid passes a flow meter and is supplied to an automatic titration device. A filter medium 42 is inserted into a filter body 41 by a guide 46 and is attached and fixed there. The filter medium is divided equally into, for example, three of an upper part, a middle part, and a lower part, and perforations 50 having 1-5mm. diameter are provided in the upper part, and perforations 51 having 100mu-1mm. diameter are provided in the middle part, and no perforations are provided at all in a lower part 42a; and the sample liquid is stagnated in this part 42a, and iron having a high specific gravity is settled and accumulated there. |
