Optionally-electrostatic, sub-micron particle filtration system treating gases for analysis in chamber by calibrated sensors, includes fully-automatic gas-flushing equipment for filter, preventing sensor contamination

摘要

The filtration system comprises fully-automatic gas-flushing equipment, for continuous or intermittent cleaning. Preferred Features: The filter (1) is blasted by pressurized medium. With the fan shut off, a measured quantity of pre-pressurized medium in a cylinder (10) is delivered via a flushing line into the filter, to leave with the finest particles, via an outlet. In cyclic operation, the sample flow is interrupted by shutting off the fan, followed by injection of the medium. Inlet and outlet valves (8,11) open and close appropriately, ultimately restoring sample flow to the sensor chamber (2) and sensor (21). Timing is adjustable, or is controlled automatically in terms of total throughputs.