Pulse cleaning on commercial filter systems is accomplished with a blast of compressed air. The systems usually have large diameter air valves and piping leading from an accumulator to the clean side of the filter. The valves are triggered in stages, so that each stage receives the full volume of the accumulated air.
Ideally you want the blower to be stopped while cleaning takes place, so that the dust falls into the hopper instead of being sucked back into the filter. So a good practice is to run a cleaning cycle after every shutdown. Some systems also run a cleaning cycle based on system vacuum between the blower and filter. In this case you sometimes can’t stop the filter, so you would slow it down as a compromise while the cleaning takes place, as the OP described. > On Aug 23, 2023, at 8:01 AM, Todd Zuercher <to...@pgrahamdunn.com> wrote: > > Just curious how this could work physically. I can't imagine how a dust > collector motor could reverse for a 10th of a second. Every dust collector > I've worked with seems to take at least half a second (or more, sometimes a > lot more if it's a big one) just to spin up to speed let alone move an > appreciable amount of air. I also can't imagine the impellers working well > with or liking being reversed. Or are you talking about diverting the air > flow to reverse the air flow to the filtration unit somehow? The large dust > collector systems I've worked with all use a separate blower contained within > the filter bag house system that blows a reverse pulse of air into the filter > bags to clean them, and the small ones don't have anything. > > Todd Zuercher > P. Graham Dunn Inc. > 630 Henry Street > Dalton, Ohio 44618 > Phone: (330)828-2105ext. 2031 > > -----Original Message----- > From: Earl Weaver <weaverst...@frontier.com> > Sent: Tuesday, August 22, 2023 11:41 AM > To: emc-users@lists.sourceforge.net > Subject: [Emc-users] Reverse Pulse Control on Dust Collectors > > [EXTERNAL EMAIL] Be sure links are safe. > > Hi everyone, > > Does anyone have suggestions what would be a good option for reverse pulse > control on my dust collectors? > > I have 3 separate dust collectors that use (two each) air solenoid valves to > give the filters an alternating 100 millisecond (1/10 second) pulse to remove > the dust from the filters. > I have solid state switch relays (triac) to pulse the 120 volt AC solenoid > valves. > > I already have this setup on my LinuxCNC Plasma cutter and have it working > with ClassicLadder in LinuxCNC. > It seems somewhat overkill to use a full LinuxCNC setup to control these > other three dust collectors. > > Would a micro-controller like Arduino be a better solution? > I have no experience with Arduino. > > What about a PLC? > > Any input, or suggestions? > > Thanks, > Earl > -- > > > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
