Thermo Fisher Scientific Gmbh

Other

Thermo Electron Corporation

Schneider Electric Systems Usa, Inc.

Applied Instrument Technologies, Inc.

James H Grassi

Jeffrey S Socha

Dieter Kita

Dirk Appel

Brian W Cranton

Bryan A Marcotte

Michael Burka

David Erickson

Matthew Patrick Hammond

Gordon C Brown

Maximillan Ben Shaffer

Pierre Villeneuve

Jeffrey Socha

Automated measurement of fluid solution capacitance in industrial processes to determine solution concentration. Industrial process control transmitters determine solution concentration directly from solution capacitance and confirm concentration determinations based on solution conductivity. The industrial process control transmitters include terminals embodied in wire coils and/or metallic plates, at least one processor, and at least one computer readable memory device.

Industrial process control transmitter for determining solution concentration

An oxidized mercury converter utilizes a combination of heat, reduced pressure, and dilution when converting oxidized mercury in a gas sample into elemental mercury. The converter applies heat to a gas sample to thermally convert oxidized mercury within a gas sample into elemental mercury and an oxidizing component, and thereafter reduces the pressure of the gas sample to minimize combination of the elemental mercury with other oxidizing compounds present in the gas sample and/or with byproducts of the thermal conversion (e.g., the oxidizing components). The converter thus allows an accurate analysis of the total amount of mercury, both oxidized and elemental forms, present within a gas sample without the need to use consumable reagents in the mercury conversion process.

Method and apparatus for converting oxidized mercury into elemental mercury

An optical apparatus for measurement of industrial chemical processes. The analyzer uses Raman scattering and performs measurement of chemical concentrations in continuous or batch processes. The analyzer operates at a standoff distance from the analyte (or analytes) and can measure concentrations through an optical port, facilitating continuous, non-destructive, and non-invasive analysis without extracting the analyte or analytes from the process. The analyzer can measure one or several solid, liquid, or gaseous analytes, or a mixture thereof.

Chemical analyzer for industrial process control

A calibration assembly generates elemental mercury and oxidized mercury for calibrating components of a mercury monitoring system, including making necessary adjustments to efficiencies of a mercury compound converter and an elemental mercury detector. The calibrator generates an elemental mercury sample having a known elemental mercury concentration, [Hg]and combines an oxidizing component with the elemental mercury sample, thereby producing a reduced concentration of elemental mercury [Hg]within the sample. The calibrator measures the concentration of elemental mercury [Hg]within the sample and calculates a difference between the known elemental mercury concentration, [Hg]and the reduced concentration [Hg]. The difference between [Hg]and [Hg]is substantially equal to the concentration of oxidized mercury produced by the calibrator. The concentration of oxidized mercury can also be calculated as the difference between elemental mercury detected after passing a sample stream containing oxidized mercury through a channel which includes the converter and the reduced concentration [Hg]detected after passing the sample stream through a channel which bypasses the converter. By providing oxidized mercury at calculated concentrations, the calibrator allows a user to calibrate continuous emission monitoring systems for accurate response to both elemental mercury and oxidized mercury.

Mercury monitoring system and calibration

Disclosed are a system and method for monitoring total mercury within a gas sample in a substantially continuous manner and for calibrating for both elemental and oxidized mercury. A converter of the Continuous Emission Monitoring System (CEMS) receives a gas sample containing vaporized mercury from a probe. The converter converts oxidized mercury present within the gas sample into an elemental mercury component and an oxidizing component using thermal cracking. The converter also reduces the pressure of the gas sample to minimize recombination of the elemental mercury component with the oxidizing components. A mercury analyzer of the system receives the reduced pressure gas sample from the converter and detects the fluorescence of the elemental mercury within the sample. The mercury analyzer holds the gas sample at the reduced pressure to reduce an effect of fluorescence quenching on the fluorescence of the elemental mercury within the sample and provides substantially accurate measurement of the concentration of the elemental mercury in the gas sample.

Method and apparatus for monitoring mercury in a gas sample

An improved elemental mercury analyzer utilizes a fluorescence assembly in combination with a fluorescence quenching reduction mechanism to detect the concentration of elemental mercury within an emission gas sample, via fluorescence of the mercury within the gas sample, while minimizing fluorescence quenching of the gas sample. In one arrangement, the analyzer contains the emission gas sample under a vacuum or negative pressure while detecting fluorescence of the elemental mercury within the emission gas sample. By performing fluorescence detection of the emission gas sample at reduced pressure relative to the pressure of the as-sampled emission gas, the analyzer reduces the number of particle collisions within the emission gas sample over a certain period of time. Such collisional deactivation, and/or the addition of oxygen depleted gas such as nitrogen to the gas sample, reduces fluorescence quenching of the emission gas sample, improving accuracy of detection of mercury.

Method and apparatus for detecting the presence of elemental mercury in a gas sample

Growing community of inventors

Westwood, MA, United States of America

James H Grassi