APPARATUS FOR MEASURING DISSOVLED OXYGEN IN HIGH CONCENTRATION SALT SOLUTION

摘要

PURPOSE:To enable automatic and continuous analysis of dissolved oxygen with a dissovled oxygen measuring device by measuring a mixture of a high temperature/high concentration solution to be measured and a deaired pure water after it is diluted and cooled. CONSTITUTION:A sampling tube 2 is communicated to a tube 1 through which a solution containing a high concentration salt flows and provided with a regulation valve 8 for regulating the flow rate and an insulation heat trace 9 for preventing precipitation of the salt. A high temperature fluid with a high concentration of salts being fed from the sampling tube 2 is mixed with a deaired pure water from a tank 3 with a mixer 4. The concentration of the salts in the fluid shall be less than they are precipitated at a temperature near the normal temperature near the normal temperature while the temperature is lowered. Then, the fluid is introduced into a cooling section 5 to lower the temperature thereof down to the vicinity of the normal temperature and dissolved oxygen is measured with a sensor 15 in a sensor box 14.