Clariflocculator

Question

I would like to know why it is that in a clariflocculator the flocculator drive system rotates opposite to the clarifier drive system.

Philippe Drouet · Answer

There is no rule: the direction is selected during the design phase or even the  commissionning to minimize hydraulic short circuits.

Roop Kishore · Answer

1.
  Two separate drive units are provided for flocculator & clarifier mechanism so that both are operative independently. Flocculator will rotate from the centre while clarifier will rotate from end.
  
  Flocculator drive
The flocculator drive comprises of motor connected by worm reduction gear of suitable ratio through flexible coupling, chain & sprocket to get required RPM of suitably sized flocculator paddles which are suspended from the arms of central flocculation zone made of RCC.
Clarifier drive  
Clarifier mechanism is used continuously to remove the settled sludge from the centre of the tank. 
Clarifier drive comprises of motor connected with worm reduction gear box by chain & sprockets to impart slow motion to the driving steel/tyred wheel moving on periphery of the clariflocculator tank.
    2. 
  Superstructure comprising of moving steel structural bridge spanning half the diameter of the tank. The bridge is provided with chequered plate, MS hand railing & trolley with steel/tyred wheel.
    3. 
  Sludge rake arm is suspended from the bridge (moving) which rakes the tank bottom once in revolution. Sludge rake arm is provided with adjustable brass/rubber squeezes for proper sludge scrapping.
    4. 
  The feed is let into the clariflocculator by means of hollowed central RCC column at the bottom. The flocculator drive unit, drive cage & rake arms are supported by central RCC column.
    5. Necessary weir plates to be fixed to the outlet launder can also be provided on request.
    6.
  Floating scum scrapper with scum box & high torque switch can also be provided on special request.
    7.  
  Painting - parts suitably cleaned & under water parts are cleaned with wire brush & provided with one coat of red oxide primer. Epoxy painting is provided on special request if required.
    8.Telescopic sludge removal arrangement can also be provided on request.
    9. Access ladders/staircase to the bridge can also be provided on request.
    10. Full bridge can be provided on request.

Rajendrakumar Saraf · Answer

This is manufacturer decision. Both direction can give the same result.
Rajendrakumar V Saraf, FIE, FIWWA
Chairman
 
Viraj Envirozing India Pvt. Ltd
21, Radhakrishna, Near SBI, Paud Road
Pune 41038
Tel 02015433445, 9822186763
www.virajenvirozing.com

Kudakwashe Sanyamandwe · Answer

Thanks for the information Roop

Clariflocculator

Taxonomy

4 Answers

1.	Two separate drive units are provided for flocculator & clarifier mechanism so that both are operative independently. Flocculator will rotate from the centre while clarifier will rotate from end.

	Flocculator drive The flocculator drive comprises of motor connected by worm reduction gear of suitable ratio through flexible coupling, chain & sprocket to get required RPM of suitably sized flocculator paddles which are suspended from the arms of central flocculation zone made of RCC. Clarifier drive Clarifier mechanism is used continuously to remove the settled sludge from the centre of the tank. Clarifier drive comprises of motor connected with worm reduction gear box by chain & sprockets to impart slow motion to the driving steel/tyred wheel moving on periphery of the clariflocculator tank.

2.	Superstructure comprising of moving steel structural bridge spanning half the diameter of the tank. The bridge is provided with chequered plate, MS hand railing & trolley with steel/tyred wheel.

3.	Sludge rake arm is suspended from the bridge (moving) which rakes the tank bottom once in revolution. Sludge rake arm is provided with adjustable brass/rubber squeezes for proper sludge scrapping.

4.	The feed is let into the clariflocculator by means of hollowed central RCC column at the bottom. The flocculator drive unit, drive cage & rake arms are supported by central RCC column.

5.	Necessary weir plates to be fixed to the outlet launder can also be provided on request.

6.	Floating scum scrapper with scum box & high torque switch can also be provided on special request.

7.	Painting - parts suitably cleaned & under water parts are cleaned with wire brush & provided with one coat of red oxide primer. Epoxy painting is provided on special request if required.

8.	Telescopic sludge removal arrangement can also be provided on request.

9.	Access ladders/staircase to the bridge can also be provided on request.

10.	Full bridge can be provided on request.