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Starting Sequence:
1. Close flock tank drain valve. (Valve provided by customer)
2. Turn on control power.
3. Turn on water (open inlet valve) to spray header and turn on the booster pump for 5
minutes before continuing with the next step.
4. Turn on unit drive and set proper speed.
5. Turn on flock drive and set proper speed.
6. Turn on sludge feed system.
7. Turn on polymer feed system.
8. Adjust polymer dosage to achieve desired solids consistency.
Note: The water spray system should always be ON when the rotary drum is
running!
Adjustments to Optimize Unit Performance:
The ThickTech rotary drum thickener can be adjusted to optimize performance.
Adjustments can be made by adjusting the polymer dosage, opening/closing the rotary
drum detention ring port closures, adjusting the drum rotation speed, adjusting the spray
header impact angle, and adjusting the flock drive speed.
Polymer Dosage:
It is possible to have too much or too little polymer. When working with polymers
“more” is not always better. A proper polymer dosage will yield thickened sludge,
clear return water, and the treated sludge in the flock tank will have a distinct
separation of flocculated solids dispersed in clear water.
When the polymer dosage is too low, the discharge sludge will be runny with little to
no flock. The return water will contain excess solids. When looking into the flock
tank, the treated sludge will have little to no flocculated solids. The ThickTech rotary
drum thickener responds quickly to changes in polymer dosage. If you conclude
that there is insufficient polymer, increase the dosage in small increments, waiting 5
minutes between increases until you get the desired solids consistency.
When there is too much polymer there will be screen blinding, the discharge sludge
will be runny with water and flocked solids. The return water will be clear, but
because of the blinded screen, a portion of the return water will be discharging with
the thickened sludge. Looking into the flock tank the treated sludge will have the
appearance of being well conditioned. It may have a “slick” feeling or a milky water
appearance. If over treating of the sludge is determined, back off the polymer
dosage in large increments until the screen blinding clears. If severely blinded, it
may take up to 15 minutes for the screen to clear. It is much easier to work up to
the proper polymer dosage, so do not hesitate to greatly decrease the amount of
polymer being added or shut off the polymer feed for a short time.
Any increase or decrease in either solids content or sludge flow will require chemical
adjustment to maintain treatment balance. Be alert to any possibilities of a
treatment imbalance and the resulting change in thickened sludge consistency.
4-2
Содержание Hycor ThickTech RDT400
Страница 7: ...EXHIBITS ...
Страница 28: ...CYLINDER ROTATION RDT CYLINDER ROTATION AS VIEWED FROM DISCHARGE END 4 1A ...
Страница 42: ...DRIVEN IDLER SPROCKET CHAIN DRIVE SPROCKET CHAIN AND SPROCKET ASSEMBLY SPROCKET TENSIONER 6 1A ...
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Страница 181: ...Control Panel BOM Drawings ...
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Страница 196: ...Equipment Drawings ...