Kurz Instruments, Inc. applications

Thermal mass flow meters provide excellent measurement capabilities in dry gas flows. They have proven durability, accuracy, and repeatability. However, thermal flow meters are sensitive to liquid droplets in a wet gas stream. For a thermal flow meter to work accurately in a condensing gas environment, the probe must be placed far enough downstream so that the entrained water has condensed onto the pipe wall. In a very wet environment, any condensing liquid (commonly referred to as mist or fog) contacting the sensor probes causes a high reading due to the liquid vaporizing on the heated portion of the sensor. As a result of this deficiency, measurements with conventional thermal meters are largely ignored when moisture levels rise because there is no confidence that the measurements are true.

In a recent project and the subject of this paper, Kurz engineers conducted a study that lead to a unique, new design that allows thermal flow meters to perform accurately within a wet digester gas environment. The testing environment applies to landfill and digester applications.

Secondary Air Flow Overview: The need for accurate, repeatable & reliable combustion air measurements in power generation plants is critical to efficient operation and safety throughout the entire facility and processes. Accurate secondary air flow measurement to the burners is critical for maintaining the proper air to fuel ratio, result­ing in more complete and stable combustion, better performance and lower emissions. Coal-fired power plant applications pose a number of challenges to obtaining these critical flow measurements including large ducts, limited metering runs, poor velocity and temperature profiles, vibration and high temperatures.

Aeration Process Introduction: Waste Water Treatment removes impurities and contaminants from a com¬munity`s sewage utilizing a number of different processes and a variety of equipment. One of the processes is the use of surface aerated basins that use aerobic micro-organisms to remove 80 to 90% of organic matter in waste water. Oxygen concentration in the water basins is a critical factor to promote the optimum micro-organism growth rate needed to treat the water in the shortest amount of time. As a result, large compressors are used to force air through hundreds of air diffusion filters at the bottom of the aeration basins, providing a constant 24/7 supply of oxygen to the micro-organisms in the water.

Kurz Thermal Insertion Mass Flow Meter systems provide proven accuracy and reliability in the most difficult of EPA Title IV applications with the ability to survive for long periods of time without maintenance.

The Kurz Insertion Mass Flow Meter products provide extremely reliable and accurate measurements for the harsh environment of a recovery boiler facility, without restricting airflow even in short run ducts.

The Kurz Insertion Mass Flow Meter products provide extremely reliable and accurate measurements with a number of features specifi cally tailored for landfi ll gas monitoring applications.

Kurz Insertion Mass Flow Meters provide precise monitoring for compressed air and gas applications resulting in increased efficiency and decreased overall operating costs.

Kurz thermal mass flow meters exceed the certification levels required by the Mandatory GHG Reporting regulation and are approved for these applications.