Eka BMU is a unit for online measurement of total solids and ash content in broke.
The unit consists of a dilution vessel, mixer, level probe, pump, Chemtronics CWF sensor, valves and piping, and a cabinet with computer and electronics, all housed in a stainless steel frame.
The unit runs cyclically with the following sequences: dilution, water intake, broke intake, mixing and circulation through a sensor while measuring and emptying takes place. Cycle time is 6-8 minutes, depending on conditions.
The broke is diluted to about 6 g/l in order to obtain an optimal measuring concentration. The dilution factor is precisely calculated at each cycle.
Installation is done near a broke pipe after the broke pump to avoid plugging the sampling pipe. The broke is continuously circulated through the three-way valve and the unit.
The unit operates in parallel with the broke pump and operating mode. Sensor reading and calculations are controlled by the process computer (First Control µController). A printer in the operating panel is used for sensor signal recording when taking laboratory samples for calibration.
Calibration is done on a PC and the calibration constants are easily put into the unit. Typical accuracy (fine paper coated broke) for total solids is ±1.5 g/l and for ash content ±1 g/l.