Chemical scrubbing is the removal of odor-causing chemicals from air and liquid streams. Basically, a process gas or liquid stream flows counter-currently past a liquid chemical which removes the undesirable component of the gas (or liquid). It is important in waste treatment as well as industrial processes, and it is the most common method for odor control. The process of chemical scrubbing requires the addition of large amounts of caustic and dangerous chemicals.
Measurements in scrubbing applications:
Flow:
Monitor flow of the make up water .
Monitor levels of waste water being discharged into the sewer system.
pH:
Monitor pH of the liquid in the misters. If pH of the recycled liquid through the misters (droplets) exceeds the process requirements, the scrubbing becomes inefficient. Once the pH exceeds the predetermined level, the scrubbing solution is discharged and replaced.
Monitor pH of the make up water. This pH measurement is critical to ensure an effective scrubbing process.
Conductivity: Monitor the water supply's TDS levels when required.
Level using a pressure sensor : Measure the hydrostatic level to accurately monitor the liquid level in the scrubber.
Signet Product Line - Features & Benefits
Flow
515, 2536
• High quality, low cost
paddlewheel for reliable
measurement
• Wide flow range for measuring
varying flow rates
• Choice of wetted materials for
compatibility to process
environment
2551
• Insertion style magmeter for
easy installation in up to 8
in. pipes
• Accurate measurement
even in dirty liquids
• 4 to 20 mA output available
for direct input to PLCs or
chart recorders
• Digital (S3L) output for long
cable runs without
compromising signal output
pH
2724, 2726,
2774, 2776
• DryLoc® connectors for
quick & easy installation
• Reliable flat or bulb designs
for long service life
• Various mounting styles
to fit piping designs
2764, 2766
• Differential reference designed
to withstand harsh chemical
compounds commonly found in
scrubber wastewater
