Monitoring Coal and Fly Ash Flows
For Flow of Coal, Pulverized Coal, Fly Ash, Slurries, and Fugitive Dust
Monitoring of coal and fly ash movement and flow is important for detection of line and hopper plugging and filter and precipitator malfunction.
Applications
precipitator malfunction and incipient bag filter failurecoal flow (plugging) in bunkers, hoppers, and feeders
fugitive dust in coal yard and in the fly ash handling areas
monitor of precipitator and filter efficiency
monitoring and alarm for pulverized coal line flow
Figure 1. Placement of Detecting Probes for System Monitoring
Description
The Jonas, Inc. Coal and Fly Ash Flow Monitor and Alarm are instruments for continuous, inline monitoring of flows of granular materials and powders or dust in a space. The medium containing the particles can be air, gas or liquid. The instrument can operate at temperatures up to 1800 F and pressures up to 10,000 psi.
Particle Flow Alarm: gives one or two alarm signals at pre-determined levels of the particle flow rate in particles/second or total mass/second. It works well in detecting small filter bag holes before a major bag failure, thus providing an opportunity for scheduled maintenance.
Particle Flow Monitor: detects particle flows and provides advanced warning of potential line plugging.
A non-penetrating sensor can be used with both instruments. This allows for easy installation and eliminates any probe erosion problems.
Description of Method
The instruments are based on the monitoring of minute shock waves produced by the impact of solid or liquid particles on a Detecting Probe. A transducer converts these waves, which are proportional to the kinetic energy of the impacting particles, into an electrical signal.
