BM 70A gives reliable continuous measurement in a harsh environment

Problem
A Georgia paper mill needed to measure the level in a titanium generator containing chlorine dioxide. Feed must be kept constant in order to maintain a specified level range because if the level dropped, the entire pulp bleaching process would shut down and cost the company $10,000 per hour until they could resume operations. The mill was challenged to find a measurement unit that could withstand the harsh, “boiling cauldron” environment. They already knew that differential pressure level measurement didn’t work -- the gases generated below the liquid surface gave them false readings.

Solution
The only option was to look at the surface through a 6-inch sight glass, a technique that was not guaranteed to work given the cruel environment. KROHNE representative Tom Foster mounted the BM 70A over the sight glass, and the installation performed perfectly. The customer was amazed that the gauge could work under such adverse conditions. The BM 70A was put to a trial test for 30 days to ensure it would work under all the variety of conditions this particular vessel would produce. After 30 days, the KROHNE device was still giving accurate measurements and the customer purchased it outright. The system with installation cost roughly $8,000 and has been installed since October 1998. Although it is difficult to determine the total savings to the mill, it’s assumed that it is well over $100,000.

Key Words: Level, radar, chlorine dioxide, paper, bleach
AP0043