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| | | Forum Newbie
Group: Forum Members
Last Login: 4/23/2008 10:57:17 AM
Posts: 3, Visits: 29 |
| | Looking to install a barscreen,now have a channel monster and want to replace it will some kind of new barscreen,climbing screen,flexrake sick and tired of problems at our head works want something low maint. and very reliable looking for some feed back from plant mechs who have something they like. I know there lots of new things out there want something that works! jstew DCWWTP |
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| | | Forum Newbie
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Last Login: 3/28/2008 4:37:05 PM
Posts: 8, Visits: 3 |
| | I am a fan of the center flow concept though I think the design is still a little lacking, blinding issues are overstated as a rule, bricks and logs I think are overstated as well, of course the critical issue is, is system a gravity system by and large or a force main system, in other words lots of non dissolved solids or mainly dissolved solids. In a force main system I think it is a fine choice. Issues are drive mechanisms and cleaning. I am familiar with both Bracket Green and Jones and Attwood now G L &V/ EIMCO. I thought US Filter had the best drive, with drive sprockets outside of media instead of inside, but they dropped the ball on media. I also thought JWC might be a contender though they are new to the screen game or at least center flows. I think center flows have one main advantage, no carry over. Not a big fan of Parkson AquaGuard or Climbers, two technologies that had a long good run but had design shortcomings. I think step screens an interesting concept that may prove a good idea so long as you do not have extensive grit issues that may prove wearing on the tight clearances of a step screen, there may be ways to work around that, a sump in fornt to catch grit that you might have to clean out periodically but the issue again is flow a gravity system or force main system? On climbers I had heard from a good source a common design rule of thumb was no more than 20 square feet, of course if a retro to an existing channel they will sell perhaps whatever you say you need but if wide or deep you will have issues related to alignment eventually. Rich |
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| | | Forum Newbie
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Last Login: 4/23/2008 10:57:17 AM
Posts: 3, Visits: 29 |
| | Thanks for your input our plant is a 4.0mgd activated sludge with 2mgd reclaim is in the foot hills with 35 lift stations so we get very little dissolved solids are problems are high maint. costs and hair,lit&small rags plugging pumps & mixers. we have come down to two choices bandsceen- M,M.or 1/4 barscreen-flexrake by duperon. don't know how the bandscreen will handle larger material or how much small material will get though 1/4" barscreen. jstew |
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| | | Supreme Being
Group: Forum Members
Last Login: Yesterday @ 5:20:14 PM
Posts: 210, Visits: 626 |
| | jstew, It is surprising what can get through a 1/4 screen at times. However it is really important that you monitor the way the edges of the screen are designed and the unit installed because i have seen what would otherwise be a good installation let down by a gap here or there where larger material will get through. Regards TerryF |
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| | | Forum Newbie
Group: Forum Members
Last Login: 4/1/2008 1:27:34 PM
Posts: 1, Visits: 3 |
| Hello, I work for a major barscreen manufacturer and develop technology. I agree that 1/4" opening screens can allow quite a few items to pass. However I would evaluate if those items really impact what is downstream. Most people who have installed ¼” screens. Installation is critical. If any fine screen is installed improperly it will allow debris to pass. I have attended a membrane conference recently and that was the #1 issue with fine screens, second was leakage through seals. Also drum screens are becoming favored over dual flow type screens. The dual flow screens tend to leak as they have complicated sealing mechanics. Headworks is a difficult area to design for, that is why most equipment requires heavy maintenance schedules. I would select a piece of equipment that you feel is simple and easy to maintain. I would also select a manufacturer that is based in the states and offers timely/effective service. Some manufacturers have lead times exceeding 6 weeks for parts. Good Luck, and enjoy your new screen. |
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