Black Liquor is the waste product from the process of
digesting pulpwood into paper pulp by removing various elements to free
the cellulose fibers. Electron Machine's long history with this application has resulted in numerous design
features that specifically address problems associated with this harsh
process measurement.
Green liquor is the dissolved concentration of sodium
sulfide, sodium carbonate, and other compounds from the recovery boiler
in the paper making process. Electron Machine Corporation has been actively refining the use of
refractometers for measuring green liquor density for over 30 years. The current system
uses the MPR E-Scan refractometer combined with heated high-pressure
water for cleaning. The resulting combination provides an effective
removal of optical coatings by reducing thermal changes, minimizing
maintenance to allow for a reliable measurement source for on-line
automatic control.
The MDS Monitor Divert System is a BLRBAC compliant Black Liquor solids monitoring system designed specifically for Black Liquor recovery boilers. The MDS Monitor Divert System consists of two completely independent MPR
E-Scan Hybrid-Digital refractometers with a separate monitor console
that supervises the proper operation of each refractometer. The monitor
constantly insures that all parameters remain within operational limits
and applies the proper divert or alarm actions should a fault or low
solids liquor be detected. A built-in printer records all actions with a
date and time stamp. The entire system is designed to be user friendly
with large daylight-readable color displays and an intuitive menu-driven
interface.
The MPR E-Scan also gives paper companies the ability to accurately control the washing line, by detecting changes in the total dissolved solids coming off the washers. This precise measurement allows effective control of the fresh water flow to the washers, reducing excessive water usage. Combining the measurement with data- analysis tools, a company can monitor inefficiencies in the washing line and evaluate the washing results. Allowing improvements in washing efficiency and overall reduction in water. The MPR E- Scan will reduce the overall time needed to meet target dilution. With near instant readings of black liquor concentration and temperature, the instrument removes the reliance on offline testing.
For more information, visit http://www.electronmachine.com or call 352-669-3101.
