Process gas chromatographs have been used since the 1950s to provide real-time compositional data to process control systems. Today, there are tens of thousands of process gas chromatographs in use throughout the process industry making the gas chromatograph the analytical workhorse for on-line compositional measurements.
When it comes to providing one of the most versatile additives and fillers, NYCO Minerals, Inc., has accomplished this for over 50 years with its production of wollastonite using Schenck Accurate's weighing and feeding equipment.
Use of online instrumentation for process control purposes is very common in wastewater treatment facilities. At one time, plants used online analyzers and instrumentation for monitoring only. Today, they are critical process control tools.
This is a plant that collects wastewater from plant processes and run-off in a large storage tank that is treated with sulfidic caustic. The conventional process utilized DE as a precoat for the filter to assist in facilitating the separation of solid contaminates. This process is to prevent contamination of the downhole formations of the deep well injection system where the wastewater is ultimately sent. After the filter leaf vessel, the water is then sent to tertiary vessels using string-wound cartridges for final solids removal before being disposed of via deep well injection.