Advanced hybrid particulate collector. Quarterly technical progress report, April 1--June 30, 1996

The objective of the project is to develop a highly reliable advanced hybrid particulate collector (AHPC) that can provide > 99.99% particulate collection efficiency for all particle sizes from 0.01 to 50 {micro}m, is applicable for use with all US coals, and is cost-competitive with existing technologies. The main technical progress for the previous quarter was the design and construction of the 200-acfm working model of the AHPC. Some additional modifications to the 200-acfm AHPC were made during April through June, and extensive shakedown and cold-flow testing were completed. The initial modeling results by ALENTEC (presented in the last quarterly report) indicated that the flow baffling as constructed should be sufficient to direct most of the flow into the electrostatic precipitator (ESP) zone of the AHPC before it reaches the bags. Cold-flow tests now confirm that the baffle configuration is sufficient for proper AHPC performance. Cold-flow multiple cleaning cycle tests show that there is a huge benefit to having the electric field on compared to having the field off. These tests also show that the AHPC functions properly and that pressure drop can be easily controlled